so in the smoke 2 Purified Negative Pressure Multistage Nested Absorption-Analysis Citrate Process

A process and negative pressure technology, applied in the field of negative pressure multi-stage nested absorption-analysis, can solve the problems of multi-stage nested absorption-analysis without negative pressure, achieve volume reduction, reduce the number of theoretical plates, and reduce energy consumption Reduced effect

Active Publication Date: 2017-05-31
马鞍山艺诚机电有限公司
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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 Negative pressure multi-stage nested absorption-analytic process method

Method used

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  • so in the smoke <sub>2</sub> Purified Negative Pressure Multistage Nested Absorption-Analysis Citrate Process
  • so in the smoke <sub>2</sub> Purified Negative Pressure Multistage Nested Absorption-Analysis Citrate Process
  • so in the smoke <sub>2</sub> Purified Negative Pressure Multistage Nested Absorption-Analysis Citrate Process

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Embodiment 1

[0067] Example 1 ( figure 1 )

[0068] Flue gas flow:

[0069] 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), enters from the bottom of the primary absorber 101, and in the primary absorber 101 is in countercurrent contact with the primary absorbent 10 sprayed down from the liquid distributor 501 to remove 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 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 08 is in countercurrent contact, and part of the SO is removed 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 be...

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Abstract

The invention provides a citrate process for purifying SO2 in smoke through negative-pressure multi-stage nested absorption and desorption. The citrate process comprises multi-stage absorption; gradient utilization of a solution among stages of absorption devices; loop nesting use of part of an absorption solution in the stages; multi-stage desorption under the negative pressure. The process has the advantages as follows: the utilization efficiency of an absorbent is improved; the process medium procedure is clear; configuration of each stage of device of the process unit is optimized; the desorption driving force is large; the desorption temperature is low, a low grade heat source can be adopted for heating, and the cost of the heat source for desorption is reduced; thermal decomposition of citrate (a buffering agent) is slowed down; the size of each absorption device is small; few absorbents are used on the whole, and transmission power consumption is low; few process equipment is used; the pressure system is consistent, the operation is convenient and the like.

Description

technical field [0001] The invention belongs to flue gas removal of SO 2 The field of the invention relates to a negative pressure multi-stage nested absorption-analysis 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(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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