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Valve

A technology of valve ports and flow distributors, applied in the field of valves, can solve the problems of expensive construction and maintenance of rotary valve systems, lower equipment removal efficiency, and leakage of partitions, and achieve excellent sealing characteristics, small bypass, and reduced volume Effect

Inactive Publication Date: 2008-07-16
MEGTEC SYST INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the untreated process gas leaks through the valve, allowing the gas to exit the unit untreated, such leakage will greatly reduce the removal efficiency of the equipment
In addition, conventional valve designs create pressure fluctuations when switching, which exacerbates the possibility of such leaks
[0006] The same leakage risk exists in conventional rotary valve systems
Also, such rotary valve systems typically include many internal baffles that can leak over time, and rotary valve systems are expensive to construct and maintain

Method used

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Embodiment Construction

[0027] first reference figure 1 and 2, a dual chamber regenerative thermal oxidizer 10 (catalytic or non-catalytic) is supported on a frame 12 as shown. The oxidizer 10 comprises a housing 15 in which there are first and second heat exchanger chambers communicating with a centrally disposed combustion zone. A burner (not shown) may be associated with the combustion zone and a combustion blower may be supported on frame 12 to supply combustion air to the burner. The combustion zone includes a bypass outlet 14 which is generally in fluid communication with an exhaust stack 16 to atmosphere. The control cabinet 11 houses various controls of the equipment. And preferably also on the frame 12 . Opposite the control cabinet 11 is a fan (not shown) supported on a frame 12 for driving process gas into the oxidation unit 10 . Housing 15 includes a top chamber or roof 17 having one or more access doors 18 to provide operator access to and from housing 15 . For those of ordinary ski...

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Abstract

Switching valve and a regenerative thermal oxidizer including the switching valve. The valve of the present invention exhibits excellent sealing characteristics and minimizes wear. The valve has a seal plate that defines two chambers, each chamber being a flow port that leads to one of two regenerative beds of the oxidizer. The valve also includes a switching flow distributor which provides alternate channeling of the inlet or outlet process gas to each half of the seal plate. The valve operates between two modes: a stationary mode and a valve movement mode. In the stationary mode, a tight gas seal is used to minimize or prevent process gas leakage. The gas seal also seals during valve movement.

Description

technical field [0001] The invention relates to a valve. Background technique [0002] Regenerative thermal oxidizers are commonly used to destroy volatile organic compounds (VOCs) in high-flow, low-concentration effluents from various industries and power plants. Such an oxidation device generally requires a high oxidation temperature in order to obtain a high VOC removal rate. In order to achieve high heat recovery efficiencies, the "dirty" process gas to be treated is preheated prior to oxidation. A heat exchanger column is generally installed to preheat these gases. The column is usually packed with a heat exchange material having good thermal and mechanical stability and sufficient thermal mass. In operation, a process gas is sent through a preheated heat exchanger column which in turn heats the process gas to near or to its VOC oxidation temperature. This preheated process gas is then introduced into the combustion zone where any incomplete oxidation of VOCs is typ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23G7/06F27D17/00F23L13/04F23D99/00F23L15/02F27D7/02
CPCF27D17/008F23G7/068F27D2017/007F27D7/02F23G2202/60Y10T137/5689F27D17/00
Inventor J·T·卡斯
Owner MEGTEC SYST INC
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