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Treatment system and process suitable for VOCs (Volatile Organic Compounds) in tar storage tank

A processing system and storage tank technology, applied in gas processing, membrane technology, dispersed particle separation, etc., can solve the problems of low processing efficiency, increased cost, complicated operation, etc.

Active Publication Date: 2021-07-06
SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that although its vapor pressure does not cause too much loss in the absorption process, it often leads to excessive concentrations of harmful substances contained in the exhaust gas
Washing oil has poor adsorption capacity for sulfide
In addition, wash oil must be regenerated before it can be returned to the system for reuse, increasing costs
[0005] Based on the analysis of existing technologies, the disadvantages can be sorted out as follows: low processing efficiency, high operating cost, complicated operation, large investment, large floor space, etc.

Method used

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  • Treatment system and process suitable for VOCs (Volatile Organic Compounds) in tar storage tank
  • Treatment system and process suitable for VOCs (Volatile Organic Compounds) in tar storage tank
  • Treatment system and process suitable for VOCs (Volatile Organic Compounds) in tar storage tank

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preparation example Construction

[0049] The preparation method of described VOCs absorbent is as follows:

[0050] 1) Add ethanol into the beaker, and heat it to 30-60°C with a water bath with a built-in stirring function. After the temperature stabilizes, add sodium benzoate, continue to add ethanol while stirring until the sodium benzoate is completely dissolved, and record it as solution A;

[0051] 2) After fully stirring cold methanol, butanediol, diethylhydroxylamine and liquid paraffin, add solution A while stirring at a speed of 0.1-3g / min to obtain solution B, the viscosity of solution B is 2000-3000cP;

[0052] 3) Stir and heat solution B to 60-70°C, then add washing oil, add polysorbate-80 and solubilizer during continuous stirring, and prepare the VOCs absorbent after the viscosity of the mixed solution reaches 10-50cP.

[0053] The solid recovering agent is used to absorb H 2 S, NH 3 gas, prepared as follows:

[0054] The carrier of the solid recovering agent is high specific surface modified ...

Embodiment 1

[0060] A treatment process suitable for VOCs in tar storage tanks, which mainly includes a liquid-carrying contact mixer 2, a down-rotating ridge liquid removal pipe 3, an absorption liquid collection tank 4, a reciprocating push-flow folded plate adsorption box 5, and a bundle tube type recycler6. The liquid-carrying contact mixer 2, the down-rotating ridge liquid removal pipe 3, the absorption liquid collection pool 4, the reciprocating push-flow folded plate adsorption box 5, the bundle tube type recovery unit 6 and other units pass through air ducts, fans, pumps, various The similar pipelines are connected in sequence, and the VOCs are purified in sequence. The VOCs absorbent used in the process is an efficient and environmentally friendly VOCs absorbent suitable for VOCs in tar storage tanks. The adsorbent used is a high specific surface modified slag suitable for VOCs in tar storage tanks. The recovery agent used is a suitable H 2 S, NH 3 Solid recovery agent for gas...

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Abstract

The invention relates to a treatment system and process suitable for VOCS (volatile organic compounds) in a tar storage tank. The system comprises a liquid carrying type contact mixer, an underspin ridge liquid removal pipe, an absorption liquid collection pool, a reciprocating plug-flow type folded plate adsorption box and a beam tube type recoverer. A waste gas outlet at the upper end of the liquid carrying type contact mixer is connected with an inlet at the upper end of the underspin ridge liquid removal pipe. The lower end of the underspin ridge liquid removal pipe is communicated with the absorption liquid collection pool, and the absorption liquid collection pool is communicated with the reciprocating plug-flow type folded plate adsorption box. The beam tube type recoverer is arranged at the upper end of the reciprocating plug-flow type folded plate adsorption box and is communicated with the reciprocating plug-flow type folded plate adsorption box. The absorption liquid collection pool is loaded with an absorbent, and the absorbent is fed into a perforated liquid distribution pipe and a Venturi injection pipe. The high-specific-surface-area modified slag fills the gaps between the folded plates. A hollow beam tube is filled with a solid recycling agent. The VOCs treatment modes for storage tanks of tar and various oil products in the coking industry, the metallurgy industry and the coal industry are optimized and integrated, the purification effect is guaranteed, and meanwhile the system has the advantages of small investment, small occupied area, easy operation and the like.

Description

technical field [0001] The invention belongs to a VOCs treatment process, which is applied to the waste gas treatment of storage tanks in coking, metallurgy and coal industries; in particular, it relates to a VOC method suitable for tar storage tanks. S processing systems and processes. Background technique [0002] Volatile organic compounds (VOCs) are a general term for all organic compounds that have a vapor pressure ≥ 0.01kPa at 20°C or are volatile under specific applicable conditions. During the storage process, the gas volume in the storage tank will expand through the tar feeding process or temperature changes, and a large amount of hydrogen sulfide, ammonia, hydrogen cyanide, tar, naphthalene, benzene series, polycyclic and heterocyclic aromatic hydrocarbons, etc. will be discharged. Mainly VOCs exhaust gas. Long-term storage of coal tar will also lead to stratification due to poor fluidity, tar residues will be deposited at the bottom, and the necessary stirring ...

Claims

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Application Information

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IPC IPC(8): B01D53/18B01D53/04
CPCB01D53/18B01D53/1487B01D53/1493B01D53/04B01D2257/304B01D2257/406Y02A50/20
Inventor 杨丙衡杨爽安路阳裴振谢国威方会斌李国成
Owner SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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