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Active coke adsorption tower and method for adsorbing and purifying flue gas by active coke

A technology of activated coke and adsorption tower, which is applied in the field of activated coke adsorption tower and activated coke adsorption and purification of flue gas, and can solve the problems of secondary pollution of ammonia and low adsorption capacity of activated coke.

Active Publication Date: 2020-03-24
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, due to the low adsorption capacity of activated coke for ammonia, the amount of ammonia escaped from the flue gas outlet of the adsorption tower reaches 10-30mg / Nm 3 , causing secondary pollution of ammonia

Method used

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  • Active coke adsorption tower and method for adsorbing and purifying flue gas by active coke
  • Active coke adsorption tower and method for adsorbing and purifying flue gas by active coke
  • Active coke adsorption tower and method for adsorbing and purifying flue gas by active coke

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Embodiment

[0066] This example is used to illustrate the method for purifying flue gas by activated coke adsorption of the present disclosure.

[0067] Such as figure 2 As shown, the adsorption tower adopts a three-stage cross-flow adsorption structure, and the flue gas 1 to be purified in the comparative example is used. From the upstream device, it first enters the inlet gas buffer A4 of the adsorption tower A, and then passes through the first-stage cross-flow adsorption bed A1 , cross-flow contact with activated coke to remove most of the SO in the flue gas 2 . The flue gas from the first-stage cross-flow adsorption bed A1 enters the first inter-stage gas buffer zone A5, where it is evenly mixed with the denitrification ammonia injection 5, and then enters the second-stage cross-flow adsorption bed A2, where it is mixed with the active coke cross-flow contact to remove the remaining SO 2 and NO X . The flue gas from the second-stage cross-flow adsorption bed layer A2 enters the...

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Abstract

The invention relates to an active coke adsorption tower and a method for adsorbing and purifying flue gas by active coke. According to the active coke adsorption tower disclosed by the invention, anactive coke adsorption area and a gas buffer area are arranged; flue gas firstly enters the upper gas buffer area, so that the flue gas is adsorbed through cross-flow contact with active coke at the upper portion of the active coke adsorption area, and is subjected to horizontal flow baffling in the tower so as to penetrate through the active coke adsorption area multiple times to form multi-stageadsorption; the flue gas adsorbed at the upper portion is fed into the lower portion of the active coke adsorption area through a gas pipeline, and is subjected to cross-flow contact with the activecoke flowing down from the upper portion of the adsorption area and adsorbing sulfur oxide; H2SO4 converted in the desulfurization process is stored in the pores of the active coke on the lower portion, wherein the H2SO4-containing active coke has high reaction activity to ammonia and can completely capture excessive ammonia in flue gas so as to effectively control ammonia escape of purified fluegas and avoid secondary pollution of ammonia.

Description

technical field [0001] The present disclosure relates to the technical field of activated coke dry flue gas desulfurization, in particular to an activated coke adsorption tower and a 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...

Claims

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Application Information

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IPC IPC(8): B01D53/04B01D53/58B01D53/82B01D53/86B01D53/56
CPCB01D53/04B01D53/58B01D53/82B01D53/8625B01D2253/102B01D2257/302B01D2258/0283
Inventor 郝少博李浩周桂娟黄孟旗李出和
Owner SINOPEC ENG
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