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Method for treating organic waste gas by using circulating fluidized bed

A circulating fluidized bed and organic waste gas technology, applied in the field of environmental management, can solve the problems of large number of equipment, fire, and inability to deal with organic tail gas, etc., and achieve high heat utilization rate and good heat transfer effect

Inactive Publication Date: 2014-12-10
清本环保工程(杭州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (3) It cannot handle the tail gas with high organic content, and the phenomenon of rapid bed temperature and even fire often occurs due to the generation of adsorption heat;
[0007] (4) The number of equipment is large, the area is large, and the investment cost of equipment is high

Method used

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  • Method for treating organic waste gas by using circulating fluidized bed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) An enterprise contains ethyl acetate organic waste gas, the treatment capacity is 10000m3 / h, and the ethyl acetate content is 15g / m3;

[0030] (2) First add the adsorbent to the adsorbent storage tank, turn on the cooling medium of the cooling finger tube, pass air into the adsorption fluidized bed from the inlet pipe, detect that the internal temperature of the adsorption fluidized bed is lower than 20°C, and turn on the spiral Add the adsorbent to the feeder, and then adjust the feeding speed after adding to the specified height to maintain the internal height of the adsorption fluidized bed to be stable;

[0031] (3) After the adsorption fluidized bed is stable, switch the air to the organic waste gas to be treated, maintain the temperature of the adsorption fluidized bed at 20±5°C, the residence time is 20s, and the tail gas emission concentration can reach 100mg / m3, which can reach the standard discharge;

[0032] (4) After the tail gas is separated from th...

Embodiment 2

[0037] (1) An enterprise has toluene-containing organic waste gas, the treatment capacity is 5000m3 / h, and the toluene content is 5g / m3;

[0038] (2) First add the adsorbent to the adsorbent storage tank, turn on the cooling medium of the cooling finger tube, pass air into the adsorption fluidized bed from the inlet pipe, detect that the internal temperature of the adsorption fluidized bed is lower than 20°C, and turn on the spiral Add the adsorbent to the feeder, and then adjust the feeding speed after adding to the specified height to maintain the internal height of the adsorption fluidized bed to be stable;

[0039] (3) After the adsorption fluidized bed is stabilized, switch the air to the organic waste gas to be treated, maintain the temperature of the adsorption fluidized bed at 20±5°C, the residence time is 15s, and the tail gas emission concentration can reach 30mg / m3, which can reach the standard discharge;

[0040] (4) After the tail gas is separated from the gas...

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Abstract

The invention discloses a method for treating organic waste gas by using a circulating fluidized bed. The method for treating the organic waste gas by using the circulating fluidized bed is characterized by comprising the following steps: the organic waste gas to be treated is in contact with an adsorbent in an adsorption fluidized bed, the adsorption temperature is 10-50 DEG C, the air speed is 100-750 h<-1> and the retention time of the gas in the bed layer is 3-20 seconds; then the tail gas is separated from the adsorbent by a cyclone separator and a bag type dust remover and the tail gas is directly discharged; the recycled adsorbent enters a desorption fluidized bed, a small amount of high-temperature carrier gas is filled and used for desorbing the adsorbent, the desorption temperature is 80-250 DEG C, the air speed is 50-200 h<-1> and the retention time of the gas in the bed layer is 10-50 seconds; the desorbed adsorbent returns to the adsorption fluidized bed by virtue of an adsorbent storage tank and a screw feeder. The method for continuously treating the organic waste gas by using the circulating fluidized bed is good in treatment effect, simple and stable to operate, low in equipment investment, high in heat utilization efficiency, small in adsorbent loss, and is especially suitable for high-concentration organic waste gas.

Description

technical field [0001] The invention belongs to the field of environmental treatment, and in particular relates to a method for treating organic waste gas by using a circulating fluidized bed. Background technique [0002] The treatment technology of organic waste gas is generally divided into two types: recycling method and destruction method. With the gradual development of non-renewable resources, the market share of recycling method will increase. [0003] The recovery method to treat organic waste gas generally adopts a fixed bed adsorption system, which consists of two or more towers, and performs intermittent operations of adsorption and desorption respectively. This method has the following disadvantages: [0004] (1) It is necessary to continuously switch between multiple fixed bed adsorbers, and the operation is cumbersome; [0005] (2) Higher requirements for adsorbents, generally requiring better adsorption effect and higher adsorption capacity for organic matte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/12B01J20/34
Inventor 刘硕肖新霞张越华
Owner 清本环保工程(杭州)有限公司