Fume Incineration Systems

We offer both thermal and catalytic type fume incineration systems as well as one of the most efficient dual fuel electric and gas catalytic oxidizers on the market. Applications have been for SVE, VOC, and CO emissions. We have developed technology in thermal and catalytic fume systems utilizing a two-pass design with preheat exchangers for VOC disposal. Destruction efficiency of the catalyst systems can be as high as 95-99+%, with operating costs one of the lowest in the industry.

SVE applications will typically have high VOC levels during the first few months of operation. In these applications we recommend our thermal oxidizer, Model HTT FM-G with the optional catalyst module. The thermal systems can operate safely with VOC levels as high as 50% with operating temperatures up to 2,000F. In a few months, when the VOC levels drop, the catalyst module is bolted to the mounting flange and the temperature setpoint is reduced to 550F. The module is mounted to a flange located under the stack transition section. This system will dramatically reduce the fuel usage. The AT module can be purchased as part of the original order, or later as required.

HTT systems options can include preheat exchangers, induced draft or secondary combustion blower, modulating dilution air TEE's, stack extensions, and catalyst modules. The Catalytic Oxidizers function exactly the same as a Thermal Oxidizer. The major difference is the operating temperature necessary for destruction of the VOCs. The HTT Lo-Temp Catalyst can operate effectively at temperatures as low as 400 F in some applications. The fuel savings at these low temperatures can be significant in reducing operating costs. Catalysts cannot be used in applications where chemical poisons or particulates are present such as SOX and silicone compounds.

Systems will be of the two basic types of waste gas streams. The first is the most common. The application will have a waste gas stream that will be mostly ambient air with a small quantity of VOC. For these applications, you can select the size based on the flow rate in SCFM. The second type is more complicated. In these applications, the gas stream that will contain little or no oxygen and high concentrations of VOC. In these applications, we calculate the amount of combustion air necessary to burn all of the hydrocarbons in the stream and then must add sufficient additional combustion air so that the final exhaust gas will contain a minimum of 8-10 percent oxygen.

Exhaust gas from a chemical process that contains almost 100 percent VOC, can sometimes be injected directly through the burner nozzle. With this type the system the Oxidizer is started with natural gas and brought up to temperature. Once temperature is reached the waste stream is slowly added to the natural gas passing through the burner. When this occurs the temperature rises, the natural gas is throttled back, and the system uses the waste gas and thus displaces the natural gas. Should the temperature in the chamber rises above set point, and the burner output throttles back to low fire, the second temperature controller opens the damper on secondary air blower. During this condition, the secondary air is used
to maintain temperature.

In some applications the waste stream is diluted with secondary air before injection into the firing chamber. The same auxiliary temperature controller can be used to operate a bleed air tee valve thus controlling the amount of dilution air necessary during operation. For these special applications, we select a medium velocity premix type burner with an integral high-pressure combustion air blower sized for the waste gas volume plus the required combustion air.

Also furnished on our standard units, will be the natural gas valve train including, solenoid shutoff valves, flamerod detection, and gas butterfly valve with modulating control motor keeping the system in compliance with FM requirements. Components may be furnished pre-piped and wired or supplied loose for installation by others.

Download the Thermal and Catalytic Oxidizers PDF