Envitech systems are custom engineered to solve the most challenging air emission problems.
Envitech systems treat hot gases from thermal processes including kilns, furnaces, roasters, dryers, incinerators, hazardous waste combustors, thermal oxidizers, gasifiers, and pyrolyzers. Click on the links below to learn more about specific applications and to download literature.
Explore the technology solutions that Envitech provides.
Metal Refining
Equipment for calciners and roasters used in copper, gold, lithium, nickel, and other metal refining processes to achieve outlet gas emission requirements.
The transition to a low-carbon economy depends on the extraction and treatment of rare-earth elements. Lithium, nickel, and cobalt are the building blocks of the battery revolution, while copper and rare earth elements power the global electrical grid. However, extracting these materials from raw ore or recycled scrap is a thermally intensive process. Calciners, roasters, and smelting furnaces release a difficult mix of ultra-fine particulate, acid gases, and condensed metallic fumes that must be captured.
Envitech provides the comprehensive gas cleaning train required for these difficult refining operations. Envitech’s process begins with high-efficiency quenchers to instantly cool hot furnace off-gas, followed by packed beds and Venturi scrubbers for acid gas and primary particulate control. For facilities targeting the most stringent emission limits, Envitech’s proprietary Wet Electrostatic Precipitators (WESP) provide a final polishing stage, removing the fine metallic aerosols and blue smoke that traditional scrubbers miss.
Engineered for the corrosive and abrasive environments of modern hydrometallurgy and pyrometallurgy, Envitech systems are built for sustained uptime. Envitech helps refiners meet tough air quality standards – ensuring that rare-earth metals are produced through the cleanest processes available.
Oil Refining
and Sulfur
Recovery
Packed bed scrubbers to remove hydrogen sulfide (H2S), ammonia (NH3) and sulfur dioxide (SO2) from refinery vents.
Petroleum fuels the global economy—powering transportation, heavy manufacturing, and the infrastructure of modern life. As refineries transform crude into gasoline, lubricants, and plastic precursors, they must manage the impurities inherent in fossil feedstocks. The removal and recovery of sulfur is a critical step in this process.
Envitech delivers heavy-duty gas scrubbing solutions engineered for the demanding environments of the refining industry. Envitech's packed bed scrubbers are a primary defense for refinery vent emissions, whether serving as a backup to Sulfur Recovery Units (SRU) or providing the final polishing of tail gas emissions. By efficiently neutralizing H2S and SO2, Envitech systems provide the dependable performance and regulatory compliance necessary to maintain continuous plant uptime in high-output facilities.
Designed for long-term durability and pressurized operation, Envitech systems are built to integrate seamlessly into complex refinery architectures. Envitech understands that in the energy sector, environmental reliability is synonymous with operational profitability.
Waste Oil Refining, and Asphalt Production
Packed bed scrubbers to remove sulfur dioxide (SO2) from thermal oxidizers.
Waste oil re-refiners give used engine and equipment oil a second life by stripping away impurities to produce high-quality base oil. Similarly, asphalt production relies on the treatment and recycling of heavy hydrocarbons. These essential industries reduce waste, but the thermal treatment required to process these materials can generate volatile organic compounds (VOC) and acid gases that demand sophisticated abatement.
Envitech has become the premier partner for this industry due to its ability to maintain optimal performance despite challenging emission requirements and variable vent streams. Envitech’s packed bed scrubbers are equipped with industrial-grade instrumentation and controls to handle fluctuations in gas flow rates and acid loading.
Engineered for the rugged environments of re-refineries and asphalt plants, Envitech scrubbers deliver proven, best-in-class uptime. Envitech understands that equipment reliability and consistent environmental compliance are the cornerstones of profitable oil and asphalt production, ensuring these facilities stay online and in good environmental standing.
Hazardous
Waste
Incineration
Multi-step pollution control equipment to mitigate acid gases, particulate, heavy metals, mercury, and dioxins/furans from hazardous waste incinerators.
Hazardous waste incinerators provide a critical service for the chemical, pharmaceutical, and manufacturing industries. High-temperature incineration remains the most effective method for neutralizing complex waste streams, but the process transforms liquid and solid hazards into a sophisticated mix of air pollutants. To operate safely, these facilities must meet the world’s most rigorous environmental standards, including the HWC MACT (Hazardous Waste Combustor) regulations.
Envitech is a global leader in providing the comprehensive gas cleaning trains required for hazardous waste applications. Envitech’s integrated approach typically begins with a high-efficiency quencher to cool hot gases from secondary thermal oxidizers, followed by a packed bed absorber for acid gas neutralization and a Venturi scrubber for particulate control and. For facilities facing the toughest limits on sub-micron particulate and heavy metals, Envitech incorporates its proprietary wet electrostatic precipitators (WESP) to ensure consistent compliance.
With decades of experience and dozens of successful installations, Envitech systems are engineered for the extreme corrosive environments and variable loads inherent in hazardous waste processing. Envitech provides reliable systems and ongoing technical expertise to plant operators that depend on these systems to protect the environment.
Specialty
Chemical
Processing
Acid and ammonia absorbers for chemical recovery and liquid contactors for solvent recovery.
Specialty chemical manufacturing is an engine of innovation, producing high-value additives, polymers, and catalysts. These processes often involve complex reactions that utilize concentrated acids, ammonia, and organic solvents. To maintain process efficiency and environmental stewardship, facilities must not only neutralize waste gases but, where possible, capture and recycle expensive chemical reagents back into the production loop.
Envitech specializes in the hard-to-solve emissions challenges of the chemical sector. Envitech’s custom-engineered absorbers and liquid contactors are designed to handle high-concentration vent streams with maximum mass-transfer efficiency. Whether it’s recovering ammonia for reuse or removing hydrochloric acid (HCl) and chlorine (Cl2) from a high-pressure reactor vent, Envitech systems are built to perform in a wide array of applications. Envitech utilizes corrosion-resistant materials, including exotic alloys and fluoropolymer linings, to prevent corrosion and ensure long-term reliability.
Beyond simple compliance, Envitech focuses on process integration. Envitech’s systems are engineered to minimize pressure drop and optimize reagent consumption, reducing the total cost of ownership. For specialty chemical producers, an Envitech scrubber is more than a pollution control device—it is a critical component of the manufacturing process.
NOx
Scrubbing
Removal of nitrogen oxide compounds via oxidation and absorption and selective and non-selective catalytic reduction.
Nitrogen oxides are among the most challenging pollutants to manage, contributing to smog, acid rain, and respiratory issues. Whether generated by high-temperature thermal combustion, the production of nitric acid for fertilizers and explosives, or the high-energy demands of rocket fuel oxidation, NOx emissions require specialized chemical treatment.
Unlike simple acid gases, NOx often exists in varying ratios of NO and NO2, necessitating a sophisticated, tailored approach to mitigation. Envitech provides engineered NOx scrubbing solutions that go beyond basic absorption. Envitech’s systems utilize single and multi-stage packed bed towers, often incorporating oxidation-reduction chemistry to convert insoluble NO into treatable forms. For aerospace applications, such as the treatment of hypergolic propellants like Nitrogen Tetroxide (N2O4) and Mixtures Oxides of Nitrogen (MON), Envitech’s scrubbers provide the flexibility and reliability required for engine testing environments.
From industrial boilers to defense and space exploration, Envitech systems are designed for high-efficiency removal and, where possible, the recovery of nitric acid as a valuable byproduct. Envitech’s deep expertise in reaction kinetics and mass transfer ensures that facilities meets the most stringent opacity and emission standards, regardless of the NOx source or concentration.
Pharmaceutical
Processing
Absorbers for chemical emissions from reactors and thermal oxidizers.
The pharmaceutical industry is defined by relentless innovation to produce life-saving medications and active pharmaceutical ingredients (APIs). However, the chemical synthesis required to create these complex molecules often involves exotic reagents and solvents. Reactor vents and process exhaust can release concentrated streams of hydrochloric acid (HCl), chlorine (Cl2), hydrogen sulfide (H2S) and various organic compounds that must be captured or destroyed prior to atmospheric release to maintain both environmental safety and cGMP standards.
Envitech provides highly engineered, compact scrubbing systems engineered to the specific footprints and stringent requirements of pharmaceutical plants. Because drug manufacturing often involves batch processing with shifting chemical profiles, Envitech’s systems are designed with maximum flexibility and advanced automation to account for variable pollutant loads. Utilizing corrosion-resistant materials such as Hastelloy, fiberglass, and high-performance plastics, Envitech scrubbers offer superior corrosion resistance against the harshest chemistries.
Beyond simple abatement, Envitech understands the importance of uptime in a high-value production environment. Our automated control systems integrate seamlessly with plant-wide DCS (Distributed Control Systems), providing real-time monitoring and data logging for regulatory reporting. With Envitech, pharmaceutical manufacturers can focus on the next medical breakthrough, confident that their emission control system is performing as well as their laboratory.
Geothermal
Power Generation
Envitech packed bed scrubbers remove hydrogen sulfide (H2S) and sulfur dioxide (SO2) for the treatment of non-condensable gases which evolve from the brine.
Geothermal energy is a cornerstone of the renewable energy transition, providing reliable, carbon-free baseload power by tapping into the earth’s natural heat. However, extracting energy from deep geothermal reservoirs often releases non-condensable gases (NCG) trapped in the steam. These gases, primarily hydrogen sulfide H2S and ammonia (NH3), are highly corrosive to power plant infrastructure and can release odors that impact power plant workers.
Envitech provides the advanced gas cleaning technology required to make geothermal energy truly sustainable. Envitech’s packed bed scrubbers and redox systems are engineered to handle the high-volume, saturated gas streams typical of geothermal flash and binary plants. By efficiently neutralizing H2S and NH3, Envitech systems prevent equipment corrosion and ensure that geothermal facilities maintain their status as clean, community-friendly power sources.
Designed for the remote and often harsh environments where geothermal resources are found, Envitech scrubbers emphasize rugged durability and automated operation. Envitech’s systems are built to withstand the scaling and mineral-heavy conditions of geothermal fluids, providing the reliable uptime necessary to keep the grid powered and the air clean.
Tank Vents
and Lab
Scrubbers
Packed bed absorbers to capture exhausts from filling activities, reaction vessels, and hoods.
Safe chemical management begins at the source. Across industrial plants, water treatment facilities, and research laboratories, the storage of concentrated acids, caustics, and reagents presents a constant challenge: venting. As storage tanks are filled or temperatures shift, displaced vapors such as HCl, NH3, or other semi-volatile liquids must be captured before they reach the atmosphere or the workplace floor.
Envitech offers a line of specialized, low-profile scrubbers designed specifically for localized vent control. Unlike large-scale process systems, these point-of-use units are engineered for high-efficiency removal in a compact footprint, making them ideal for integration into existing tank farms or lab rooftop installations. Constructed from corrosion-proof materials like fiberglass or stainless steel, Envitech’s lab and vent scrubbers provide a set-and-forget solution for managing intermittent or continuous low-flow emissions.
Whether protecting personnel from laboratory fumes or ensuring a facility remains a good neighbor by eliminating storage odors, Envitech systems deliver industrial-grade performance in a scaled-down package. With automated level controls and low-maintenance designs, Envitech’s vent scrubbers ensure compliance and odor-free operation with minimal operational oversight.
Petrochemicals
Venturi scrubbers for the capture of vinyl chloride emissions.
Petrochemicals are the building blocks of modern society, essential for everything from medical-grade plastics to essential construction materials. Polyvinyl chloride (PVC), in particular, is a critical component of plastic products and critical piping systems. However, the manufacturing process requires the use of vinyl chloride monomer (VCM), a hazardous air pollutant that requires absolute containment and high-efficiency removal. Managing these emissions is a critical mandate for maintaining facility safety and adhering to stringent EPA and global environmental regulations.
Envitech provides the specialized Venturi scrubbing technology required to manage the unique challenges of petrochemical vents. Envitech’s systems are engineered to provide maximum gas-liquid contact, ensuring the effective capture of pollutants even in high-volume process streams. By utilizing computational fluid dynamics and corrosion-resistant construction, Envitech scrubbers deliver the consistent performance required for the continuous-flow environments of large-scale petrochemical complexes.
With a focus on reliability and fail-safe operation, Envitech systems are a trusted choice for the world’s leading chemical producers. Envitech understands that in the petrochemical sector, there is no room for compromise on emission control. Envitech’s solutions provide the peace of mind that comes with proven technology, helping facilities operate at peak capacity while protecting both its workforce and the environment.
Carbon Capture
Equipment for protecting carbon capture systems from particulate and acid gases.
As industries transition toward decarbonization, carbon capture technology has become instrumental to achieving global climate goals. Whether applied to hard-to-abate industrial exhaust or emerging direct air capture (DAC) facilities, the success of these projects depends on gas conditioning. Envitech supports the CCUS (Carbon Capture, Utilization, and Sequestration) sector with proven systems that protect sensitive downstream processes and enhance overall capture performance.
Amine-based CO2 absorbers are highly sensitive to temperature and chemical impurities. Upstream gases often carry NO2, SO2, SO3, ammonium compounds, and fine particulate that can degrade expensive amine solutions, cause foaming, and significantly reduce system efficiency. Envitech’s integrated systems using quenchers, packed bed absorbers, Venturi scrubbers, and Wet Electrostatic Precipitators (WESP) remove efficiently remove these contaminants, while Envitech’s direct contact condensers (DCC) provide efficient temperature control for optimal CO2 absorption.
From pilot-scale research to full-scale industrial deployment, Envitech’s technologies ensure the gas stream is prepared for CO2 capture. Envitech systems prevent solvent degradation while maximizing uptime, making carbon capture system more efficient and commercially viable for a sustainable future.
Sulfuric Acid
Manufacturing
Envitech provides gas cleanup systems for the production of sulfuric acid, including quenchers-Venturi’s scrubbers, condenser/absorbers, and wet electrostatic precipitators.
Envitech specializes in the critical front-end gas cleaning equipment required to protect these high-value assets. Envitech utilizes high-performance Venturi-style quenchers to rapidly cool the gas and remove bulk particulate, followed by Wet Electrostatic Precipitators (WESP) to eliminate sub-micron aerosols and metallic fumes. By delivering an ultra-clean SO2 stream to the drying tower and converter, Envitech ensures optimal conversion efficiency and prevents the premature degradation of the catalyst.
Engineered for the corrosive, high-temperature environments of acid plants, Envitech’s gas cleaning equipment is built with superior corrosion-resistant materials to ensure 24/7 reliability. Envitech understands that gas purity is the key to plant longevity and profitability.
Ceramic Tile
Manufacturing
Envitech packed bed absorbers remove acidic gases such as HF, HCl, and SO2 released from ceramic kilns.
Ceramic tile manufacturing combines ancient artistry with modern industrial processes. The high-temperature firing of clays and glazes in kilns releases specific chemical byproducts, most notably hydrogen fluoride (HF) and sulfur dioxide (SO2), alongside fine mineral dust. Because HF is exceptionally corrosive to both glass and metal, and highly regulated due to its environmental impact, specialized abatement technology is required to ensure air quality compliance.
Envitech provides robust gas cleaning solutions tailored to the unique exhaust profiles of ceramic kilns. Envitech’s packed bed absorbers are designed for high-efficiency neutralization of acid gases, while our Venturi scrubbers and Wet Electrostatic Precipitators (WESP) capture the fine particulate and aerosols generated during the drying and firing stages. By utilizing advanced, corrosion-resistant materials, Envitech systems are built to withstand the aggressive nature of fluorine-rich exhausts.
With a focus on minimizing water consumption and maximizing uptime, Envitech helps ceramic manufacturers maintain production lines without the risk of environmental downtime. Envitech’s systems provide the reliability and efficiency needed to meet stringent emission standards, allowing manufacturers to focus on delivering high-quality architectural products.
Ethanol Production
Envitech supplies packed bed condensers and absorbers for recovering ethanol from off-gases at production facilities and distilleries.
Ethanol is a vital component of the modern energy mix, serving as a renewable fuel source and a key industrial solvent. However, the biological fermentation of sugars and the subsequent distillation process generate a variety of emissions, including significant ethanol vapors and hazardous air pollutants (HAPs) such as acetaldehyde. These compounds are not only regulated for air quality but also represent lost product if not managed correctly within the facility’s vapor recovery strategy.
Envitech offers specialized scrubbing solutions designed to handle the high-moisture, high-VOC streams typical of ethanol plants. Envitech’s packed bed absorbers are engineered to provide maximum surface area for the capture and neutralization of organic vapors, ensuring that fermentation vents and CO₂ scrubbers achieve peak removal efficiency. By integrating advanced mist elimination and capable of capture at low liquid-to-gas ratios, Envitech systems maintain consistent performance while preventing plugging even during peak production cycles.
Whether upgrading an existing facility to meet RFS (Renewable Fuel Standard) mandates or equipping a new biorefinery, Envitech provides the technical expertise required to ensure continuous compliance. Envitech’s systems are built for the rugged, 24/7 nature of the ethanol industry, delivering the reliability needed to keep production moving and the surrounding air clean.
Potash Mining
Envitech Venturi scrubbers remove particulate, hydrofluoric acid and sulfuric acid formed in the mining and processing of potassium.
Potash is the lifeblood of global agriculture, providing the essential potassium required to improve crop yields and soil health. Transforming raw ore into high-grade fertilizer requires a series of energy-intensive steps, including crushing, flotation, and thermal drying. These processes release dense clouds of salt dust and, depending on the fuel source for the dryers, acidic gases that can jeopardize both air quality and the longevity of the surrounding plant infrastructure.
Envitech delivers battle-tested scrubbing solutions engineered specifically for the salt-heavy environments of potash facilities. Envitech’s Venturi scrubbers are the industry standard for handling the high particulate loads from dryers and granulators, utilizing a low-maintenance design that resists the scaling and buildup common in brine processing. For facilities facing strict sulfur limits, Envitech’s integrated systems combine particulate capture with packed bed absorption to provide a comprehensive, single-source compliance solution.
Designed for the remote and demanding locations of the world’s major potash basins, Envitech systems emphasize industrial-grade durability. Envitech understands that in the fertilizer industry, seasonal demand requires maximum production uptime. Envitech scrubbers provide the reliability and set-and-forget operation necessary to run at peak capacity through the busiest growing seasons.
Secondary
Lead Smelting
Envitech provides a host of technologies to the lead smelting industry, including packed bed scrubbers for acid gas control and and wet electrostatic precipitators for heavy metal removal.
Lead recycling is a critical industry for the modern world, ensuring that over 99% of lead-acid batteries are diverted from landfills and returned to the supply chain. While smelting is the primary method for recovering this valuable metal, it presents significant environmental challenges. The high-heat furnaces used to melt battery scrap release lead aerosols and acid gases that require rigorous abatement to protect public health and comply with strict National Emission Standards for Hazardous Air Pollutants (NESHAP).
Envitech provides the comprehensive gas cleaning technology required to meet the industry’s most demanding air permits. Envitech’s systems typically utilize high-efficiency quenchers to cool furnace off-gas, followed by Venturi scrubbers for primary lead and particulate capture. For facilities targeting the highest level of lead removal, Envitech’s proprietary Wet Electrostatic Precipitators (WESP) act as a final polishing stage, capturing the sub-micron metallic fumes that escape traditional fabric filters or dry systems.
Engineered for the corrosive and high-solids environments of lead refineries, Envitech systems emphasize industrial-grade uptime and ease of maintenance. With extensive experience in the industry, Envitech understands the special attention these facilities receive from regulators and the resulting need to always meet environmental compliance requirements.
Sewage Sludge
Incinerators (SSI)
Envitech equipment reduces mercury emissions from SSI.
Municipal wastewater treatment is an essential function to preserve waterway health, yet the management of the resulting biosolids presents a significant logistical and environmental challenge. Incineration offers a sustainable solution by drastically reducing waste volume and destroying pathogens and contaminants. However, the combustion of sewage sludge produces a complex exhaust stream containing fine particulate, heavy metals including mercury and cadmium and sulfur dioxide (SO2).
Envitech is a leader in upgrading and equipping SSI facilities to meet the stringent EPA Maximum Achievable Control Technology (MACT) standards. Envitech’s integrated systems are designed to handle the high moisture and variable ash content of sludge combustion. By combining high-efficiency Venturi scrubbers for particulate removal with specialized tray towers or packed bed absorbers for acid gas and mercury polishing, Envitech ensures that municipalities can manage their biosolids safely and sustainably.
With a deep portfolio of successful retrofits and new installations, Envitech provides the technical experience required for municipal infrastructure projects. Envitech systems are engineered for 24/7 operation, providing the durability and ease of maintenance required to keep essential public utility services running without interruption.
Mineral Wool
Fiber & Glass
Fiber Production
Envitech provides Venturi scrubbers and wet electrostatic precipitators to control particulate formed during fiberization and curing processes.
Fiber insulation is fundamental product for energy efficiency, providing the thermal barriers necessary to reduce energy consumption in residential and industrial buildings. Whether melting basalt for mineral wool or silica for glass fiber, the manufacturing process releases a complex mixture of fine fiber fragments, furnace dust, and volatile organic compounds (VOCs) from binder applications. These emissions are often characterized by their “sticky” nature, requiring robust gas cleaning solutions that can manage high solids loading without clogging.
Envitech delivers custom-engineered gas cleaning trains designed for the specific emission challenges of insulation manufacturing. Envitech’s equipment trains often begin with high-energy Venturi scrubbers to capture bulk particulate and fiber debris, followed by packed bed absorbers to neutralize gaseous pollutants like ammonia and phenol. For facilities facing strict opacity limits, Envitech’s proprietary Wet Electrostatic Precipitators (WESP) provide the final stage of treatment, effectively removing the sub-micron aerosols and condensable organics that create visible plumes.
Built to handle the abrasive and corrosive nature of glass and stone melt off-gas, Envitech systems emphasize performance and uptime. Envitech understands that insulation production is a continuous, high-volume process where downtime is costly. Envitech’s technology ensures full compliance with MACT (Maximum Achievable Control Technology) standards while maintaining the throughput necessary to meet the growing global demand for sustainable building materials.
Catalyst
Regeneration
Venturi scrubbers and packed bed absorbers to manage emissions for calciners, kilns, and afterburners.
Catalyst regeneration allows refineries and chemical plants to extend the life of expensive catalytic materials while minimizing waste. Regenerators thermally strip away carbon and contaminantsto restore catalyst performance to near-virgin levels. However, the off-gas from these regeneration kilns and roasters is notoriously corrosive, containing high concentrations of SO2 and abrasive catalyst particulate that must be treated to ensure regulatory compliance and prevent unsafe emissions.
Envitech provides specialized gas cleaning solutions designed to handle the thermal and chemical spikes inherent in regeneration cycles. Envitech utilizes high-performance quenchers to cool hot furnace gases, followed by packed bed absorbers that provide the maximum mass-transfer surface area for sulfur removal. This integrated approach ensures that even the most concentrated acid streams are neutralized, protecting the facility’s air permit and its bottom line.
Engineered for the 24/7 reliability, Envitech employs corrosion-resistant alloys and high-temperature linings to ensure equipment survives harsh process conditions. Envitech assists facilities to maximize the throughput of their catalyst regeneration assets, ensuring high-quality reusable catalysts with compliant emissions.
Medical Waste
Incineration
Skid-mounted pollution control systems to mitigate acid gases, particulate, heavy metals, mercury and dioxins/furans from medical waste incinerators.
Envitech sets the standard for clean air solutions in hazardous, industrial, and medical waste incineration. Envitech’s proven, multi-pollutant control systems help facilities achieve full compliance with the industry’s toughest emissions requirements — the NESHAP MACT standards.
Waste incinerators generate a complex mix of pollutants — particulate, heavy metals, dioxins, furans, and acid gases. Envitech’s integrated approach removes them all. Envitech combines quenchers, condenser/absorbers, Venturi scrubbers, wet electrostatic precipitators, fabric filters, and carbon beds into a reliable system with a long track record of meeting HMIWI requirements.
With more than 50 successful installations, Envitech has a track record of delivering results. Envitech’s systems help protect the environment, ensure regulatory compliance, and support safe, sustainable waste management operations worldwide.
Biosolids
Packed bed absorbers for ammonia (NH3) and hydrogen sulfide (H2S) emissions and Venturi scrubbers for particulate capture from dryers and kilns.
Transforming municipal biosolids into high-energy supplemental fuel is a developing industry for reducing the maximizing global recycling efforts. By thermally removing moisture from treated residuals, facilities create a renewable, coal-like fuel pellet that reduces reliance on fossil fuels in industrial boilers and cement kilns. However, the drying process creates a challenging exhaust stream: a saturated, high-temperature mix of ammonia, organic odors, and fine dust that must be captured to protect the environment.
Envitech delivers optimized scrubbing solutions specifically designed for both the front-and back-end of biosolids fuel production. Envitech offers high-efficiency quenchers to cool and saturate dryer exhaust, chemical scrubbers to neutralize ammonia and volatile organic compounds (VOCs), and acid capture systems for back-end oxidation processes. By capturing fine organic particulate before it can accumulate in ductwork, Envitech systems mitigate the risk of fires and explosions while ensuring the facility remains a “good neighbor” by eliminating the pungent odors associated with sludge drying.
Engineered for the high-moisture and corrosive environments of fuel-processing plants, Envitech scrubbers provide the ruggedized performance needed for 24/7 operation. We help utilities and private contractors maximize the value of their residuals, providing the critical gas cleaning infrastructure that makes renewable fuel production safe, clean, and commercially viable.
Metal
Recycling
Packed bed absorbers and Venturi scrubbers to control halogens and particulate generated by the recovery and recycling of scrap metals and lithium batteries.
Automobile and scrap metal shredders are essential to the global metal supply chain, converting end-of-life products into high-quality melt stock. But the sheer force of shredding generates intense friction and heat, vaporizing trapped oils and lubricants into fine aerosols and volatile organic compounds (VOCs). Without specialized treatment, these emissions manifest as visible “blue smoke” plumes and hazardous air pollutants that can lead to strict regulatory scrutiny and community complaints.
Envitech provides industrial-grade gas cleaning solutions for the high-volume, variable-load of shredder vents. Envitech uses -energy Venturi scrubbers to capture bulk dust and fine particulate, combined with advanced mist elimination technology to knock out entrained oil mists.
Designed for the punishing environment of the scrap yard, Envitech systems emphasize heavy-duty construction. Envitech understands that in an environment with tight margins built on maximizing throughput, uptime is everything. Envitech employs low-maintenance designs to prevent the clogging and fouling common in oily exhaust streams, providing the reliability needed to keep the shredder running and the stack clean shift after shift.
Tire
Manufacturing
Collision scrubbers for the control of condensable emissions from Banbury mixers.
Tire production is a complex chemical and mechanical process, but the initial mixing stage presents one of the industry’s toughest air quality challenges. During the high-energy blending in Banbury mixers, the vaporization of process oils and additives creates a dense, “sticky” aerosol of condensable emissions. These sub-micron droplets, often combined with carbon black dust, are notorious for fouling traditional dry filters and ductwork, leading to increased maintenance costs and potential fire hazards.
Envitech delivers specialized collision scrubbers designed to handle the unique rheology of tire manufacturing exhaust. Unlike traditional scrubbers, Envitech’s collision scrubbers utilize high-velocity gas streams to force particulate and droplets into a high-energy collision zone, ensuring the capture of sub-micron condensables and fine dust. This wet-based approach not only achieves superior removal efficiency but also effectively cools the gas stream, preventing the re-condensation of oils in downstream equipment.
Built for the continuous, 24/7 demands of global tire plants, Envitech systems emphasize ruggedized performance and ease of cleanability. By mitigating the plugging risks associated with rubber-mixing byproducts, Envitech helps manufacturers maintain peak production uptime while meeting stringent environmental standards for VOCs and opacity.
Syngas and
Waste to Energy
Cleanup of synthetic gases from alternative fuels including tar removal, acid gases, char, and condensed salts.
Waste-to-Energy is the holy grail of the circular economy, diverting landfill-bound materials to produce renewable electricity, heat, and synthetic fuels. Whether through gasification or pyrolysis, the resulting syngas is a potent energy source, but it is often laden with contaminants like hydrogen chloride (HCl), sulfur compounds, and fine char. To utilize this gas in high-efficiency engines or for downstream chemical synthesis, it must be cooled and cleaned to rigorous specifications to prevent equipment erosion and catalyst poisoning.
Envitech specializes in the precision purification of syngas streams. Envitech utilize high-performance quenchers to rapidly cool the syngas, followed by Venturi scrubbers for the removal of particulate and tars. For facilities requiring ultra-low acid gas concentrations, Envitech includes packed bed absorbers to provide the final stage of chemical neutralization. This integrated approach ensures that the syngas meets the “engine-ready” standards required for 24/7 power production, protecting valuable downstream assets from corrosion and fouling.
Designed for the high-temperature, variable-feedstock nature of the WtE industry, Envitech systems emphasize rugged durability and operational flexibility. Envitech understands that reliability is the key to bankability. Envitech provides the proven technology and engineering depth needed to make waste-to-energy projects commercially successful.
Drying and
Heat Transfer
Direct contact condensers for the recovery of waste heat and Venturi scrubbers for the capture of particulate emissions.
Industrial drying is one of the most energy-intensive stages of manufacturing, essential for creating stable, shippable, and high-quality final products. Whether processing specialty minerals, salts, or agricultural products, the drying cycle generates exhaust gases containing fine particulate and moisture. Managing these emissions is a balancing act: systems must achieve stringent air quality standards without allowing the high-humidity gas to reach its dew point prematurely, which can lead to catastrophic clogging and corrosion in the ductwork.
Envitech provides heavy-duty gas cleaning solutions designed to the unique thermodynamics of heat transfer processes. Envitech’s Venturi scrubbers are the preferred choice for high-solids loading, providing simultaneous cooling and particulate capture in a single, compact footprint. For applications requiring the removal of acidic combustion gases from burners, Envitech’s packed bed absorbers deliver high-efficiency neutralization. With automated industrial controls, Envitech controls the saturation temperature of the gas, preventing mudding and buildup, and ensuring continuous operation even in the most demanding environments.
Engineered for the abrasive and high-moisture nature of industrial dryer exhaust, Envitech systems utilize materials and designs that emphasize long-term mechanical integrity. Envitech understands that an upset is more than just a reportable emission, it can ruin upstream and downstream equipment. Envitech’s technology provides the high-availability performance needed to keep your dryers running at maximum throughput while maintaining a clean, compliant stack.
Wood Pellets
and Products
Venturi scrubbers and wet electrostatic precipitators for the removal of particulate and condensables from wood processing facilities.
As the global demand for renewable energy and sustainable building materials grows, the wood products sector has become a vital component of the bio-economy. However, converting raw timber into pellets or structural panels requires high-temperature drying that dries the wood, releasing pinenes, terpenes, and other volatile organic compounds. These emissions, combined with ultra-fine wood dust, create a high-moisture, highly flammable exhaust stream that requires highly-efficient and safe capture and to meet stringent air quality permits.
Envitech offers specialized scrubbing technology designed to handle the sticky nature of wood product emissions. Envitech’s Venturi scrubbers are engineered to provide the high-energy contact necessary to capture fine wood fibers and condense organic aerosols into the liquid phase, preventing the buildup of flammable resins in downstream ductwork. For facilities with strict opacity or VOC requirements, Envitech’s Wet Electrostatic Precipitators (WESP) remove condensable VOCs, effectively controlling the blue smoke that often characterizes wood drying operations.
Engineered for the 24/7, high-volume production cycles of modern pellet mills and panel plants, Envitech systems emphasize ease of maintenance and fire safety. Envitech provides the rugged equipment needed to keep dryers running at peak capacity while maintaining a clean, compliant, and safe facility.
