GCES is your VOC & Solvent pollution control solution source. We work with your team to assess your process, production and financial objectives and develop a solution that optimizes your operations and return. Our engineering services Process Design Services and Field & Site Services provide you with the best system selection and ongoing support to get the most out of your system as your process and other conditions change.

Based on your process criteria, throughput and economic goals we determine the best type of equipment for your application. These types of equipment include thermal and non-thermal systems.

Our thermal products include oxidizers, flares and ovens. Non thermal-systems include NOx abatement system, solvent recovery.

For more information : http://www.gcesystems.com/

Product selection and design takes into account materials selection, oftentimes using stainless or other corrosion-resistant metals or even plastics or fiberglass materials. Another key part of equipment design is the control system. GCES has extensive experience with control systems and designs the control panel and logic to your specific application. Typical control systems incorporate a programmable logic controller (PLC) for system functions that are fully automated. Special features include touch screens, remote monitoring and hazardous location consideration.

Thermal Oxidizers

Regenerative Thermal Oxidizers (RTOs)

One of today's most widely accepted air pollution control technologies across industry is a Regenerative Thermal Oxidizer, commonly referred to as a RTO. They are very versatile and extremely efficient - heat recovery efficiency can reach 97%. This is achieved through the storage of heat by dense ceramic stoneware. Regenerative Thermal Oxidizers are ideal in low VOC concentrations and during long continuous operations.

Catalytic Oxidizers
Catalytic oxidation occurs through a chemical reaction between the VOC hydrocarbon molecules and a precious-metal catalyst bed that is internal to the oxidizer system.  A catalyst is a substance that is used to accelerate the rate of a chemical reaction, allowing the reaction to occur in a normal temperature range of 550oF - 650oF (275oC to 350oC). 

Thermal Recuperative Oxidizers
A less commonly used thermal oxidizer technology is a thermal recuperative oxidizer. Thermal recuperative oxidizers have a primary and/or secondary heat exchanger within the system.  A primary heat exchanger preheats the incoming dirty air by recuperating heat from the exiting clean air.  This is done by a shell and tube heat exchanger or a plate-type exchanger.  As the incoming air passes on one side of the metal tube or plate, hot clean air from the combustion chamber passes on the other side of the tube or plate and heat is transferred to the incoming air through the process of conduction using the metal as the medium of heat transfer.  In a secondary heat exchanger the same concept applies for heat transfer, but the air being heated by the outgoing clean process stream is being returned to another part of the plant - perhaps back to the process.

Direct Fired Thermal Oxidizers - Afterburner
A direct-fired oxidizer is the simplest technology of thermal oxidation.  A process stream is introduced into a firing box through or near the burner and enough residence time is provided to get the desired destruction removal efficiency (DRE) of the VOCs.  Also called afterburners, these systems are the least capital intensive, but when applied incorrectly, the operating costs can be devastating because there is no form of heat recovery.  These are best applied where there is a very high concentration of VOCs to act as the fuel source (instead of natural gas or oil) for complete combustion at the targeted operating temperature.

Selective Catalytic Reduction (SCR)
NOx Reduction (NOX)

NOx is considered a harmful greenhouse gas and substantial releases into the atmosphere are prohibited. The abatement system is configured with a NOx reducing catalyst and an ammonia injection system. The catalytic reaction of the ammonia across the Selective Catalytic Reducer (SCR) reduces the emission of NOx by converting it into basic atmosphere elements (nitrogen, oxygen, and water). The catalyst comes in varying arrangements depending on the application.

The ammonia injection system allows ammonia to be introduced to the process to combine with the process NOx and reduce the amount of NOx emitted from the system. An Ammonia Flow Control Unit (AFCU) and Ammonia Injection Grid (AIG) provide a controlled supply of anhydrous ammonia as dictated by a NOx and Ammonia (NH3) analyzer system.

Solvent Recovery Systems
Adsorption is a filtration method used to remove volatile organic compounds (VOCs) from waste gas. The gas flows through an activated carbon bed that traps the VOC particulates on its surface. Various types of activated carbon are often used in adsorption systems.
Carbon is thermally or chemically activated with the objective of providing a large surface area. One way of considering carbons potential is to consider that 1 pound of carbon has more than 100 acres of surface, which enables activated carbon to have the tremendous ability to adsorb VOCs.
Initially for carbon adsorber system design we study the isotherm(s) for particular VOCs. Other considerations include air volume, pressure, elevation, relative humidity, temperature, and the potential effects of multiple compounds in the airstream. Adsorption is a heat-sensitive and relative humidity sensitive process. Additional considerations are particulate, oils, or other contaminants that may blind the carbon from adsorbing VOC at optimal rates.
While the top layers of the lightly packed carbon bed may attain high working saturation during the adsorption mode approaching those of the isotherm, the last third of the bed is basically a polishing zone. The effect leads to an empirical dynamic working capacity of 15% to 25% of the value given by the isotherm.