Treatment system and process suitable for waste gas of circulating ammonia water tank of coking plant

A technology of circulating ammonia water and treatment system, which is applied in gas treatment, air quality improvement, chemical instruments and methods, etc., can solve the problems of complicated operation, large investment and low treatment efficiency.

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

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Problems solved by technology

[0004] Analyzing the existing technology, the shortcomings 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 waste gas of circulating ammonia water tank of coking plant

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Experimental program
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preparation example Construction

[0040] The modified CaCl 2 The particles were prepared as follows:

[0041] 1) Preparation of the carrier: Sieve siderite slag with a particle size of 5-10mm, place it in a tube furnace, and roast it at 200-250°C for 3-10h in an inert atmosphere, and add nitric acid with a concentration of 10wt%-20wt% after cooling , stirred until no more white precipitates precipitated, the cations associated with siderite may have Bi 2+ 、Ba 2+ And ammonium compounds, etc., use nitric acid to replace the surface symbiosis, which is beneficial to increase the specific surface, fully stir until no white precipitate continues to precipitate; wash the surface of the slag with deionized water to pH = 6-7, add a small amount of anhydrous Diisopropylethylamine and sodium ethylate dissolved in ethanol, the molar ratio of diisopropylethylamine and sodium ethylate is 1:1, diisopropylethylamine and sodium ethylate account for 2%-10% of the mass of the carrier, add Submerge the mixture with deionized ...

Embodiment 1

[0057] A treatment system suitable for waste gas from circulating ammonia water pools in coking plants, including waste gas collection covers 13, collection main pipes 5, ammonia absorbers 4, push-flow folded plate absorption boxes 5, absorption liquid pools 11, and cover plates above the circulating ammonia water pools 2 1 The exhaust port is connected to the exhaust gas collection cover 13 through a pipeline, and the exhaust gas collection cover 13 is connected to the collection main pipe 5, and the collection main pipe 5 is connected to the lower inlet of the ammonia collector 4, and the 4 upper end outlets of the ammonia collector are connected to push through the pipeline. A flow-type folded-plate absorption box 8, the outlet of the push-flow type folded-plate absorption box 8 is connected to the aeration pan 10 at the bottom of the absorption liquid pool 11 through a pipeline, and the aeration pan 10 is immersed in the VOCs absorbent 12; The sulfide absorbent is filled be...

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Abstract

The invention relates to a treatment system and process suitable for waste gas of a circulating ammonia water tank of a coking plant. The treatment system comprises a waste gas collection cover, a collection header pipe, an ammonia absorber, a plug flow type folded plate absorption box and an absorption liquid tank. A cover plate exhaust port above the circulating ammonia water tank is connected with the waste gas collection cover through a pipeline, the waste gas collection cover is connected with the collection header pipe, the collection header pipe is connected with a lower inlet of the ammonia collector, an outlet in the upper end of the ammonia collector is connected with the plug-flow type folded plate absorption box through a pipeline, an outlet of the plug-flow type folded plate absorption box is connected with an aeration disc at the lower part of the absorption liquid pool through a pipeline, and the aeration disc is immersed in the absorption liquid. A sulfide absorbent fills the gap between folded plates of the plug flow type folded plate absorption box. The ammonia collector is filled with a modified CaCl2 particle filler. The waste gas treatment modes for tar and ammonia water storage tanks in coking, metallurgy and coal industries are optimized and integrated, and the system has the advantages of small investment, small occupied area, simplicity in operation and the like while the purification effect is ensured.

Description

technical field [0001] The invention belongs to the field of waste gas treatment and is applied to waste gas treatment of circulating ammonia water pools in coking, metallurgy and coal industries; in particular, it relates to a treatment system and process suitable for the waste gas of circulating ammonia water pools in coking plants. Background technique [0002] A large amount of ammonia water will be used in the process of gas washing, cooling, purification and chemical product recovery and refining. Coking plants often set up circulating ammonia water tanks or ammonia water tanks to store ammonia water. Due to liquid level fluctuations and respiratory exhaust, during the storage process, waste gas with the characteristics of low concentration, large air volume, high odor concentration, and stable and continuous exhaust will be emitted, mainly including hydrogen sulfide, ammonia and a small amount of cyanide. VOCs waste gas mainly including hydrogen, tar, naphthalene, be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04B01D53/18
CPCB01D53/04B01D53/18B01D53/1487B01D53/1493B01D2257/708B01D2257/406B01D2257/30Y02A50/20
Inventor 裴振杨丙衡杨爽李宝东谢国威方会斌窦吉平
Owner SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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