Double-fluidized bed adsorption and desorption device and method for continuous treatment of organic waste gas

An adsorption device and organic waste gas technology, applied in chemical instruments and methods, gas treatment, separation methods, etc., can solve the problems of uneven temperature distribution of the desorption device, high local temperature of the desorption device, inconvenient structure and use, etc. Good heat and mass transfer effect, wide concentration range, and the effect of promoting full contact

Inactive Publication Date: 2017-02-15
东莞市佳明环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main disadvantage of using moving bed for desorption is that the required equipment is bulky and the amount of adsorbent is large, resulting in high investment; moreover, the poor heat transfer of moving bed can easily cause uneven temperature distribution in the desorption device, resulting in desorption The local temperature of the attached device is too high, which brings the safety problem of fire
In summary, the currently developed fluidized bed adsorption-desorption systems have been improved to a certain extent, but there are still many inconveniences and defects in structure and use.

Method used

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  • Double-fluidized bed adsorption and desorption device and method for continuous treatment of organic waste gas
  • Double-fluidized bed adsorption and desorption device and method for continuous treatment of organic waste gas
  • Double-fluidized bed adsorption and desorption device and method for continuous treatment of organic waste gas

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Experimental program
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Effect test

Embodiment 1

[0043] Embodiment 1 utilizes the spherical polymer resin adsorbent provided by a certain company, and the treatment concentration is 214mg / m 3 Ethyl acetate exhaust gas

[0044] The exhaust gas is introduced from the bottom of the fluidized bed adsorption device, and the gas volume is 30m 3 / h, the internal components of the fluidized bed are three-layer trays; the air is introduced from the bottom of the pneumatic conveyor, carrying the adsorbent with ethyl acetate into the separator, and then continues to be sent into the silo by the separator, and the temperature is 150 ℃ preheater for preheating, and then enter the fluidized bed desorption device with a temperature of 150 ℃ for desorption. The internal components of the fluidized bed are five-layer trays, and 8m 3 / h purge gas, take out the removed ethyl acetate, and the collected concentration is 2400mg / m 3 The condensed gas, the degassed adsorbent is discharged from the bottom and carried by the air through the pneumat...

Embodiment 2

[0045] Embodiment 2 Utilizes the spherical polymer resin adsorbent provided by a certain company, and the treatment concentration is 1094mg / m 3 Exhaust gas of o-xylene

[0046] The exhaust gas is introduced from the bottom of the fluidized bed adsorption device, and the gas volume is 30m 3 / h, the internal components of the fluidized bed are three-layer trays; the nitrogen gas is introduced from the bottom of the pneumatic conveyor, carrying the adsorbent attached to o-xylene into the separator, and then continues to be sent into the silo by the separator, and the temperature is 170 ℃ preheater for preheating, and then enter the fluidized bed desorption device with a temperature of 170 ℃ for desorption. The internal components of the fluidized bed are five-layer trays, and 8m 3 / h purge gas, take out the removed o-xylene, and collect the concentration of 2500mg / m 3 The condensed gas, the degassed adsorbent is discharged from the bottom and carried by nitrogen into the separa...

Embodiment 3

[0047] Embodiment 3 Utilizes the spherical polymer resin adsorbent provided by a certain company to deal with the air volume and low concentration produced by the furniture spray painting industry, and contains acetone, ethyl acetate and xylene with a total concentration of 320mg / m 3 exhaust gas

[0048] The exhaust gas is introduced from the bottom of the fluidized bed adsorption device, and the gas volume is 20000m 3 / h, the internal components of the fluidized bed are three-layer trays, and the feeding rate of the adsorbent is controlled at the same time to 240kg / h; the air is introduced from the bottom of the pneumatic conveyor, and the adsorbent carrying the mixed gas enters the separator, and then continues to be separated by the separator It is sent into the silo, and enters the preheater with a temperature of 170°C for preheating, and then enters the fluidized bed desorption device with a temperature of 170°C for desorption. The internal components of the fluidized bed...

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Abstract

The invention relates to the field of organic waste gas treatment and resource utilization and particularly relates to a double-fluidized bed adsorption and desorption device and a method for continuous treatment of organic waste gas. The device provided by the invention comprises a fluidized bed adsorption device (1), a preheater (5) and a fluidized bed desorption device (6), wherein an adsorbent outlet at the bottom of the fluidized bed adsorption device (1) is connected with a feed port of the preheater (5); a discharge port of the preheater (5) is connected with a feed port of the fluidized bed desorption device (6); and a solid outlet of the fluidized bed desorption device (6) is connected with a solid inlet of the fluidized bed adsorption device (1). In the invention, continuous treatment of high-concentration organic waste gas can be realized, heat accumulation can be prevented, and the problems such as bed fire and explosion caused by the dissipation failure of the reaction heat due to the excessively high concentration of the high-concentration organic waste gas are avoided; and moreover, the desorption effect of the adsorbent and the exit concentration of concentrated VOC gas are improved, and the catalytic combustion or solvent recycling is facilitated.

Description

technical field [0001] The invention relates to the field of organic waste gas treatment and resource utilization, in particular to a double fluidized bed adsorption and desorption device and a method for continuously treating organic waste gas. Background technique [0002] Volatile organic waste gases (VOCs) have caused great harm to the environment, the growth of animals and plants, and human health. Therefore, more and more countries around the world have paid attention to them. Many developed countries have issued corresponding laws and regulations to limit the emission of VOCs. At present, for the treatment of organic waste gas, a fixed-bed adsorption system is generally used, consisting of two or more towers, which perform intermittent operations of adsorption and desorption respectively. Because this method adopts intermittent operation, it needs to switch between multiple fixed-bed adsorbers, and the operation is cumbersome; and it cannot treat the waste gas with hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/12
CPCB01D53/12B01D2259/40092B01D2259/4009B01D2257/708
Inventor 宋文立都林郝丽芳范垂钢李松庚董铭罗国荣
Owner 东莞市佳明环保科技有限公司
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