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System and method for adsorbing and purifying flue gas by using active coke

A technology of activated coke and flue gas, applied in chemical instruments and methods, separation methods, gas treatment and other directions, can solve the problems of secondary pollution of ammonia and increase of ammonia consumption.

Inactive Publication Date: 2020-03-03
SINOPEC ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the current production and operation experience, when the amount of ammonia injection increases, the amount of ammonia escaped from the flue gas outlet of the adsorption tower will reach 10-30 mg / Nm 3 , which brings secondary pollution of ammonia and increases the consumption of ammonia

Method used

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  • System and method for adsorbing and purifying flue gas by using active coke
  • System and method for adsorbing and purifying flue gas by using active coke

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Embodiment

[0067] Such as figure 2 As shown, the flue gas raw material 1 to be treated first enters the dust collector (cloth bag or electric bag) F for dust removal, and the obtained flue gas 5 after dust removal is mixed with the injected ammonia gas 6 and then enters the inlet distribution of the adsorption tower B Then enter the front room B2 of the adsorption tower for desulfurization and pre-dust removal, then enter the middle room B3 for desulfurization and denitrification, and then enter the back room B4 after desulfurization and denitrification, after the flue gas in the back room cross-flow contacts with the coke to be produced Capturing the ammonia in the flue gas and converting it to ammonium sulfate can greatly reduce the ammonia slip in the clean flue gas. The clean flue gas from the back room B4 enters the outlet distribution area B5, and then leaves the adsorption tower through the flue gas outlet to obtain purified flue gas 2.

[0068] The regenerated coke 4 enters the...

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Abstract

The invention relates to a system and a method for adsorbing and purifying flue gas by using active coke. The system comprises an ammonia spraying device, an adsorption tower, a regeneration tower anda lifting device, wherein a flue gas inlet, a regenerated coke adsorption area, a to-be-generated coke adsorption area and a flue gas outlet are in gas communication and are sequentially arranged inthe adsorption tower along a flue gas flowing direction, the to-be-generated coke adsorption area is used for loading to-be-generated coke formed after adsorption of sulfur oxide with active coke, theammonia spraying device is arranged between the inlet of the system and the flue gas inlet of the adsorption tower and is used for supplementing ammonia into a flue gas raw material, and the liftingdevice is respectively communicated with the adsorption tower and the regeneration tower and is used for lifting the to-be-regenerated coke obtained by the adsorption tower to the top of the adsorption tower and / or the regeneration tower and lifting the regenerated coke obtained by the regeneration tower to the top of the adsorption tower. According to the flue gas purification system disclosed bythe invention, the adsorption tower is internally provided with the to-be-coked adsorption area filled with the to-be-coked coke, the reaction activity of the to-be-coked coke to ammonia is high, andthe ammonia in flue gas can be fully captured, so that the reaction activity of ammonia escape of purified flue gas to ammonia can be effectively controlled.

Description

technical field [0001] The present disclosure relates to the field of activated coke dry flue gas desulfurization technology, and in particular, to a system and method for activated coke adsorption and purification of flue gas. Background technique [0002] The activated coke dry flue gas purification process began to be applied industrially in the 1980s. With the increasing environmental protection requirements, the activated coke dry flue gas purification process has outstanding advantages such as high desulfurization efficiency, simultaneous removal of multiple pollutants, no water consumption for reaction, no waste water and waste residue discharge, and no corrosion problems for system equipment. More and more attention has been paid to it, and the application of this process is becoming more and more extensive. [0003] Activated coke has the functions of desulfurization, denitrification, dust removal and simultaneous removal of various pollutants. The principle lies i...

Claims

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Application Information

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IPC IPC(8): B01D53/04B01D53/58B01D53/82
CPCB01D53/04B01D53/58B01D53/82B01D2253/102B01D2257/302B01D2258/0283Y02A50/20
Inventor 黄孟旗孙丽丽李浩郝少博周桂娟李出和
Owner SINOPEC ENG
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