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Heat accumulation type thermal oxidation reactor and purification process technique for low concentration organic waste gas

A thermal oxidation and reactor technology, applied in the field of regenerative thermal oxidation reactors, can solve problems such as non-continuous reaction, large footprint of two-bed thermal storage oxidation processors, large system pressure fluctuations, etc. Low cost, small footprint and compact equipment

Inactive Publication Date: 2008-10-29
SHANGHAI DONGHUA ENVIRONMENT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the two-bed regenerative oxidation processor occupies a large area. After the regenerator is discharged, qualified clean gas must be introduced to clean the regenerator. Only after the cleaning is completed can the regenerative process be entered. Sexual switching, unable to respond continuously, and the system pressure fluctuates greatly

Method used

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  • Heat accumulation type thermal oxidation reactor and purification process technique for low concentration organic waste gas
  • Heat accumulation type thermal oxidation reactor and purification process technique for low concentration organic waste gas
  • Heat accumulation type thermal oxidation reactor and purification process technique for low concentration organic waste gas

Examples

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Effect test

Embodiment 1

[0033] Such as figure 1 , 2 As shown in and 3, the low-concentration organic waste gas rotary regenerative thermal oxidation processor A provided by the first embodiment of the present invention is used to treat low-concentration organic waste gas from a petrochemical company. The regenerative thermal oxidation processor A has an external purification gas channel The purified gas bypass valve B is used to adjust and control the temperature in the incineration chamber 4; a fan C is connected before the inlet of the sealed gas channel to introduce the sealed gas into the rotary valve 3 and the heat storage ceramic layer 1 to seal the gas channel.

[0034] The working conditions of the petrochemical company's low-concentration organic waste gas are shown in Table 1.

[0035] Table 1. Working condition table of low-concentration organic waste gas of a petrochemical company

[0036]

[0037] First, use the heat generated by the combustor 5 to burn the mixed gas of fuel gas and air t...

Embodiment 2

[0042] In the second embodiment of the present invention, the operating pressure of the low-concentration organic waste gas is 120KPa(A), the operating temperature is 36°C, and the flow rate is 30000Nm3 / h. The low-concentration organic waste gas is heated to 820°C by the high-temperature ceramics that have been thermally stored, and then enters the incineration chamber 4 for thermal oxidation reaction. The temperature rises to about 880°C, and then releases heat to the low-temperature ceramics. After testing, the temperature of the purified gas finally discharged from the thermal thermal oxidation reactor A is 80-90℃, the pressure is 114KPa(A), the average conversion rate of organic matter is 97.5%-98.5%, and the thermal efficiency of the regenerative thermal oxidation reactor It is about 96.6%.

no. 8 example

[0054] In the eighth embodiment of the present invention, the operating pressure of the low-concentration organic waste gas is 110KPa(A), the operating temperature is 30°C, and the flow rate is 96000Nm3 / h. The low-concentration organic waste gas is heated to 810°C by the high-temperature ceramic that has been thermally stored, and then enters the incineration chamber 4 for thermal oxidation reaction. The temperature is increased to about 860°C, and then the low-temperature ceramic is released. After testing, the temperature of the purified gas finally discharged from the regenerative thermal oxidation reactor A is 70~80℃, the pressure is 103KPa(A), and the average conversion rate of organic matter is 97.8%~98.7%. The thermal efficiency is about 97.1%.

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Abstract

The invention discloses a heat accumulating type thermal oxidation reactor. The reactor is mainly composed of an incineration chamber, a heat accumulating ceramic layer, a gas distribution chamber and a rotary valve. Through the distributional effect of the rotary valve, the incineration chamber can carry out rotary aeration, and the reactor carries out heat accumulation, heat emission and cleaning synchronously without intermission; the reaction is continuous without undulation; finally, the organic substances in the exhaust gas with low concentration can be transformed into harmless CO2 and H2O. The thermal oxidation reactor is suitable for processing the exhaust gas of low concentration. In addition, the invention further discloses the process for purifying the exhaust gas of low concentration.

Description

Technical field [0001] The invention relates to a regenerative thermal oxidation reactor; the invention also relates to a purification treatment process for low-concentration organic waste gas. Background technique [0002] For low-concentration organic waste gas, an incinerator with a shell-and-tube heat exchanger and a traditional two-bed regenerative oxidation treatment system are usually used in the prior art. [0003] Incinerators with shell-and-tube heat exchangers have high fuel costs, a large amount of secondary pollutants, NOx, and relatively low heat exchange efficiency. [0004] Chinese patent CN2473468Y disclosed a regenerative thermal oxidizer on January 23, 2002. It is mainly composed of a regenerative bed, a combustion chamber connected to the top of the regenerative bed, an automatic control valve, etc. The automatic control valve at the bottom of the regenerative bed The control valve is respectively connected with the intake manifold and the exhaust manifold. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G7/06
Inventor 赵小平何军民魏生桂王锡兵张超郭韬张津驰
Owner SHANGHAI DONGHUA ENVIRONMENT ENG
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