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Organic amine wet flue gas desulphurization and desorption system with high-efficiency and low-energy consumption

A wet flue gas desulfurization, organic amine technology, applied in separation methods, chemical instruments and methods, dispersed particle separation and other directions, can solve the problems of high energy consumption, low desorption efficiency, large steam consumption, etc. The effect of reducing sulfur dioxide content and reducing the amount of heating steam

Active Publication Date: 2016-01-13
TONGLING NON FERROUS METAL GROUP CORP +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems of large steam consumption, high energy consumption and low desorption efficiency in the desorption and regeneration process of the absorbent in the existing organic amine desulfurization system. 2 The high-temperature saturated water vapor (referred to as desorption gas) is directly used as the secondary heating medium of the rich amine liquid, so that the rich amine liquid entering the tower is at the bubble point temperature, that is, the high-temperature desorption gas is condensed step by step to cool the waste heat, and the bubble point of the rich amine liquid Feed, condensate bubble point reflux integrated process system, so as to realize the effective reuse of waste heat, reduce the consumption of cooling water and heating steam, and make the desorption tower desorb SO 2 Efficiency improvement, energy saving effect is very significant

Method used

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  • Organic amine wet flue gas desulphurization and desorption system with high-efficiency and low-energy consumption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] see figure 1 , the structure of this embodiment is described as follows:

[0026] A high-efficiency and low-energy organic amine wet flue gas desulfurization desorption system includes a desorption tower 1, a poor-rich amine liquid heat exchanger 3, a rich amine heater 4, a desorption tower 8, and an amine liquid purification system 9. In the desorption tower 1 A condensing cooler 6 and a separator are arranged in series between the desorption tower 8, and a reboiler 2 is arranged in the crude distillation section of the desorption tower 1.

[0027] The separator includes a primary separator 5 and a secondary separator 7; the condensation cooler 6 is located between the primary separator 5 and the secondary separator 7; the primary separator 5 is connected to the desorption tower 1, and the primary separator 5 A rich amine heater 4 is provided between the desorption tower 1 ; the secondary separator 7 is connected to the desorption tower 8 .

[0028] The rich amine li...

Embodiment 2

[0033] The structure of this embodiment is the same as that of Embodiment 1.

[0034] The working principle of this embodiment is described as follows:

[0035] The flow from the absorption tower is 220m 3 / h The rich amine liquid with a temperature of 40.7°C, after heat exchange between the poor and rich amine liquid heat exchanger 3 and the lean amine liquid, the temperature rises by 73.6°C, and then it is sent to the rich amine heater 4 to raise the temperature to 99.1°C for the second time, and then enters SO 2 Desorption tower; contains SO 2 The high-temperature saturated steam has a temperature of 111°C, is cooled and condensed in the rich amine heater, and the temperature drops to 100°C, and enters the primary separator 5 after heat exchange. The liquid is reused and sent to the liquid distributor in the rectification section, and the packing layer in the rectification section is mixed with SO 2 steam exposure. The kettle temperature was 113°C. The steam consumpti...

Embodiment 3

[0037] The structure of this embodiment is the same as that of Embodiment 1.

[0038] The working principle of this embodiment is described as follows:

[0039] The flow from the absorption tower is 308m 3 / h The rich amine liquid with a temperature of 42°C, after the heat exchange between the poor and rich amine liquid heat exchanger 3 and the lean amine liquid, the temperature rises by 71.4°C, and then it is transported to the rich amine heater 4 to raise the temperature to 98.2°C for the second time, and then enters SO 2 Desorption tower; contains SO 2 The high-temperature saturated water vapor has a temperature of 109°C, is cooled and condensed in the rich amine heater, and the temperature drops to 100°C, and enters the primary separator 5 after heat exchange. The liquid is reused and sent to the liquid distributor in the rectification section, and the packing layer in the rectification section is mixed with SO 2 steam exposure. The temperature in the bottom of the to...

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Abstract

The invention relates to an organic amine wet flue gas desulphurization and desorption system with high-efficiency and low-energy consumption. The desorption system comprises a desorber, a reboiler, a lean / rich amine liquid heat exchanger, a rich amine heater, a primary separator, a condensation cooler, a secondary separator, a desorption tower, an amine liquid purifying system and an electric regulating valve. A high-temperature saturated steam containing SO2 (desorbed gas for short) at the top of the desorber is directly used as a secondary heating medium of a rich amine liquid, so that the rich amine liquid entering the tower is at bubble point temperature; an integrated process system comprising step-by-step condensation cooling waste heat utilization of the high temperature desorbed gas, charging of the rich amine liquid at bubble point temperature, and backflow of a condensation liquid at bubble point temperature is used, so that effective reuse of the waste heat andreduced amounts of cooling water and heating steam are realized, the SO2 desorption efficiency of the desorber is improved, and the energy-saving effect is substantial.

Description

technical field [0001] The invention relates to the field of flue gas desulfurization in chemical industry, metallurgy, steel and other industries, in particular to an organic amine wet flue gas desulfurization and desorption system. Background technique [0002] Organic amine wet flue gas desulfurization technology mainly uses absorbents to selectively react with sulfur dioxide to form amine salts. The sulfur dioxide-rich amine salt solution is heated and stripped to recover high-concentration sulfur dioxide gas, and the organic amines are regenerated and recycled. Therefore, the The process has high desulfurization efficiency, desulfurizer can be recycled, SO 2 Resource utilization, no secondary pollution and other advantages. However, in practical engineering applications, there are problems such as low desorption rate, large steam consumption, and high energy consumption during the desorption regeneration process of the absorbent. [0003] At present, in the organic am...

Claims

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Application Information

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IPC IPC(8): B01D53/96B01D53/78B01D53/50
Inventor 左永伟徐光泽李正贤魏凤玉崔鹏徐洁书陈家欢王天保
Owner TONGLING NON FERROUS METAL GROUP CORP
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