Topic: rob

By Mike SimonDirector of Simulation Products, Digital Dimensions Understanding how simple design changes affect the airflow inside of Envitech's products is critical in designing efficient industrial gas cleaning systems.  Engineers who design this equipment need to analyze and understand the [...]

As the EPA continues to tighten the emissions belt, I am seeing new industries with air emissions issues. One such industry is pharmaceuticals, who are now more commonly regulated for acid gases on post-combustion devices. Pharmaceutical air emissions are typically [...]

Venturi scrubber performance hinges on four key design factors: pressure drop, particle size, water flow, and entrainment separation.  When a Venturi scrubber is not performing properly, it is best to review these design factors one-by-one. Pressure Drop Perhaps the most [...]

Acid gases can be found in the exhaust of a large number of combustion processes.  As a gas, the acid compounds usually are not particularly corrosive and are relatively easy to remove.  However, when the temperature of the gas drops below [...]

Envitech is often asked to make recommendations for particulate removal on a wide range of industrial applications.  This might entail deciding if a Venturi scrubber can do the job or if a wet electrostatic precipitator (WESP) is required.  Envitech uses proprietary modeling that [...]

The primary products of synthetic gas (syngas) production from biomass are hydrogen gas, carbon monoxide, and methane.  Unfortunately, those are not the only compounds formed.  Other compounds form depending on the elemental chemistry of the biomass.  One of the more common [...]

Concern for global climate change coupled with high oil prices has generated new interest in renewable energy sources.  One of these sources is waste to energy using gasification.  Gasification is a thermal destruction process which produces synthetic gas (syngas) as [...]

Venturi scrubbers are used for the removal of fine particulate.  Gas is accelerated at a high speed through a Venturi throat.  Water is injected perpendicular to the gas flow.  The large water drops injected into the gas stream collide with the [...]

Calcium scale occurs everywhere.  The photo on the right shows calcium carbonate scale lining the rock formations in Lake Mead, just above Hoover Dam.  The calcium from this photo deposited as a result of dissolution of calcium in upstream limestone rock formations along [...]

Acid gas scrubbers are commonly used for the removal of acid gases, such as sulfur dioxide, hydrochloric acid, chlorine, hydrofluoric acid, and nitrogen dioxide.  These scrubbers typically use a basic reagent; often sodium hydroxide, soda ash, or lime to keep the [...]