Multistage absorption-desorption citrate process for purifying SO2 in flue gas

A citrate, SO2 technology, applied in chemical instruments and methods, dispersed particle separation, separation methods and other directions, can solve the problem of no multi-stage absorption-analysis process method, etc., to save equipment investment, increase driving force, and energy consumption. reduced effect

Active Publication Date: 2016-01-20
马鞍山艺诚机电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The methods in the prior art are all single-stage citrate solution absorption processes. At present, no citrate solution is used to absorb SO in flue gas 2 The multi-stage absorption-analysis process method

Method used

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  • Multistage absorption-desorption citrate process for purifying SO2 in flue gas
  • Multistage absorption-desorption citrate process for purifying SO2 in flue gas
  • Multistage absorption-desorption citrate process for purifying SO2 in flue gas

Examples

Experimental program
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Embodiment 1

[0065] Example 1 ( figure 1 )

[0066] Flue gas flow:

[0067] After dedusting and cooling, the flue gas 01 entering the primary absorber, its y 01 10g / m 3 , F 01 200000m 3 / h (dry basis), entering from the bottom of the primary absorber 101, in the primary absorber 101, contacts with the primary absorbent 09 sprayed down from the liquid distributor 501 in countercurrent, and removes part of SO 2 After that, it is flue gas 02 from the first-stage absorber, its y 02 2g / m 3 The flue gas 02 enters the bottom of the secondary absorber 102 through the partition 001 arranged between the primary absorber 101 and the secondary absorber 102, and sprays down from the liquid distributor 502 in the secondary absorber 102 The secondary absorbent 07 is contacted in countercurrent to remove part of SO 2 After that, it is flue gas 03 from the secondary absorber, its y 03 0.5g / m 3 The flue gas 03 enters the bottom of the third-stage absorber 103 through the partition 002 arranged bet...

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Abstract

The invention provides a multistage absorption-desorption citrate process for purifying SO2 in flue gas. The process comprises the following steps: multistage absorption; gradient utilization of solutions among absorption device stages; and multistage desorption. The multistage absorption-desorption citrate process has the following advantages: the utilization efficiency of an absorbent is improved; process media and flow are clear; configuration of each stage of device in process units is optimized; the sizes of absorption devices are small; the overall usage amount of the absorbent is small and power consumption in conveying is low; desorption impetus is great; the amount of process equipment is small; pressure systems are consistent; operation is convenient; etc.

Description

technical field [0001] The invention belongs to flue gas removal of SO 2 The field of the invention relates to a multi-stage absorption-desorption process using citrate solution as an absorbent. Background technique [0002] Among the current flue gas desulfurization technologies, the widely used calcium method, magnesium method, ammonia method, and seawater method all belong to the absorption-transfer method that does not regenerate the desulfurizer. Its main features are: all use desulfurizers to absorb SO in the flue gas 2 ; The resulting product is not regenerated, but transferred or discarded. [0003] 1) The desulfurizer of the wet calcium method uses CaCO 3 or CaO, the product is CaSO 4 , the overall response is: [0004] CaO+SO 2 +1 / 2O 2 +2H 2 O→CaSO 4 2H 2 o [0005] 2) The magnesium method uses MgO slurry as a desulfurizer, and the product is MgSO 3 , the overall response is: [0006] MgO+SO 2 →MgSO 3 [0007] 3) The ammonia method is to use ammonia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
Inventor 王先玉沈立嵩刘文胜崔有为
Owner 马鞍山艺诚机电有限公司
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