A temperature-controlled safe catalytic oxidation vocs treatment method

A catalytic oxidation and safe technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of insufficient heat storage capacity, potential safety hazards, and explosion hazards of heat storage ceramics, and achieve accurate and reliable temperature of heat transfer materials. control, energy-saving effect, and system safety and reliability

Active Publication Date: 2022-02-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The initial reaction preparation time is long, inefficient, and has the following disadvantages:
When the VOCs material is in the explosive concentration range, it is easy to cause an explosion hazard when the surface temperature of the electric heating tube is too high, and there is a potential safety hazard;
[0006] 3) For the occasion of intermittent VOCs material intake, the current catalytic oxidation technology lacks effective heat storage methods or low heat storage efficiency (the heat storage capacity of traditional heat storage ceramics is insufficient)
In order to maintain the continuous response during intermittent air intake, the electric heater needs to be turned on normally and run at full power to maintain the temperature, which will easily cause huge energy loss;
[0007] 4) In the case of a large flow range, the VOCs gas heated by electric heating cannot effectively maintain the lowest temperature, thus affecting the processing capacity of the device and the processing efficiency of VOCs

Method used

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  • A temperature-controlled safe catalytic oxidation vocs treatment method
  • A temperature-controlled safe catalytic oxidation vocs treatment method
  • A temperature-controlled safe catalytic oxidation vocs treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Such as figure 1The temperature-controlled safe catalytic oxidation VOCs treatment device shown includes a catalytic reactor 4 and an air intake system connected to the catalytic reactor 4, a heat transfer oil circulation system and an air outlet system. The catalytic reactor 4 is provided with a reactor tube 43 , the upper layer of the reactor tube 43 is filled with stainless steel wire mesh or ceramic balls 431, the middle layer is filled with a catalyst 432, and the lower layer is filled with heat-conducting and supporting ceramic balls 433; between the reactor tube 43 and the catalytic reactor 4 The sealed cavity between them is filled with heat-conducting oil; the heat-conducting oil circulation system includes an oil-gas separator 8, a heat-conducting oil pump 7 and an electric heater 6 connected in sequence, and the oil-gas separator 8 is connected to the heat-conducting oil outlet 46 of the catalytic reactor 4 through a pipeline , the electric heater 6 is connec...

Embodiment 2

[0048] Such as figure 2 As shown, on the basis of Embodiment 1, a condensing unit 10 is added to the thermal circulation system of heat transfer oil, which is composed of a condenser and a cooling fan. The "high temperature" heat transfer oil can be cooled down through the condenser and cooling fan, which can better control the temperature of the heat transfer oil, so as not to cause "flying temperature" phenomenon, and can quickly take away the excessive heat released in the catalytic reactor 4.

Embodiment 3

[0050] Such as image 3 As shown, the catalytic reactor 4 includes two in parallel, and the mixed and diluted gas is transported to the two catalytic reactors 4 respectively through the blower, and the mixed gas exchanges heat with the heat transfer oil medium in the catalytic reactor 4 and raises the temperature to reach the initial stage of the reaction. temperature, and converted into carbon dioxide and water vapor under the action of the catalyst 432 in the middle layer of the reactor tube 43, releasing heat, which is then exchanged with the heat transfer oil in the lower layer of the reactor to lower the temperature. The two catalytic reactors 4 are identical in structure. The gas treatment capacity after the two catalytic reactors 4 are used in parallel is much larger than the processing scale of a single catalytic reactor 4 . The heat storage systems of the two catalytic reactors 4 are composed of a heat transfer oil circulation system.

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Abstract

The invention discloses a method for treating temperature-controlled and safe catalytic oxidation VOCs. The method is realized by using a temperature-controlled and safe catalytic oxidation VOCs treatment device. Heat transfer oil temperature: After the heat transfer oil heat storage completes normal operation, use the heat transfer oil thermal convection principle to achieve heat balance, or provide external power cycle heat transfer liquid or external power cycle and auxiliary heat dissipation and cooling to achieve heat balance, heat transfer oil absorbs catalytic reaction and releases The heat is absorbed by the fresh VOCs material to maintain thermal balance and self-continuous reaction, so as to achieve the purpose of energy saving and stable operation.

Description

technical field [0001] The invention relates to the field of volatile organic compounds (VOCs) treatment, in particular to a treatment device with strong heat storage capacity, precise and controllable reaction temperature, safe, reliable and efficient treatment of VOCs tail gas. Background technique [0002] Catalytic oxidation VOCs treatment technology is usually used to treat low-concentration VOCs materials. In recent years, with the upgrading of national and local environmental protection standards, VOCs emission limits have become increasingly stringent. Traditional VOCs treatment technologies such as adsorption and condensation methods cannot treat low-concentration VOCs materials with high efficiency for a long time, and this low-concentration VOCs materials are usually destroyed by catalytic oxidation VOCs treatment terminal technology, so as to meet the requirements of environmental protection indicators. [0003] When dealing with low-concentration VOCs materials ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01D53/88B01D53/44
CPCB01D53/8687B01D53/88B01D2257/708
Inventor 尹树孟牟善军刘全桢于辉牟小冬
Owner CHINA PETROLEUM & CHEM CORP
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