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Composite piperazine organic amine desulfurizing agent

A technology of organic amines and desulfurizers, applied in gas treatment, membrane technology, dispersed particle separation, etc., to achieve the effects of good water solubility, large absorption capacity, and low vapor pressure

Active Publication Date: 2016-12-07
HEFEI UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the crystallization problem of a single organic amine during use, enhance the stability of the desulfurizer, and improve the comprehensive absorption-desorption performance of the desulfurizer, the present invention provides a compound piperazine organic amine desulfurizer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Compound 40g of 1,4-bis(2-hydroxyethyl)piperazine with 10g of triethanolamine (the total amine concentration is 50%), add 40g of distilled water and stir to dissolve 0.1g of ethylene glycol siloxane. Add sulfuric acid to adjust the pH to 6.2, and then add distilled water to quantify to 100 g.

[0035] Take 50ml of the above solution for absorption at 50°C. After the absorption liquid reaches saturation, perform thermal desorption at 102°C. Control the total flow rate of the mixed gas to 500mL / min, SO 2 The concentration is 5000mg / m 3 .

[0036] The saturated absorption capacity of the composite desulfurizer in this example is 1.7059mol / L, while the saturated absorption capacity of 50% 1,4-bis(2-hydroxyethyl)piperazine aqueous solution is 1.5792mol / L when the desulfurizer is used. The saturated absorption of the desulfurizing agent has increased by 8.02%; the desorption rate of the composite desulfurizing agent in this example is 91.10%, while the desorption rate of 40...

Embodiment 2

[0038] Compound 20g of 1,4-bis(2-hydroxypropyl)piperazine with 2g of diethylenetriamine (the total amine concentration is 22%), add 5g of polypropylene glycol methyl ether and 0.1g of polyoxypropylene oxide ethylene glyceryl ether, Add 50 g of distilled water and stir to dissolve, add citric acid to adjust the pH to 6.2, then add distilled water to quantify to 100 g.

[0039] Take 50ml of the above solution for absorption at 50°C. After the absorption liquid reaches saturation, perform thermal desorption at 102°C. Control the total flow rate of the mixed gas to 500mL / min, SO 2 The concentration is 5000mg / m 3 . Absorption is carried out at 50°C, and after the absorption liquid reaches saturation, thermal desorption is carried out at 102°C, and the total flow rate of the mixed gas is controlled at 500mL / min, SO 2 The concentration is 5000mg / m 3 .

[0040] The saturated absorption capacity of the composite desulfurizing agent in this example is 0.8093mol / L, while the saturate...

Embodiment 3

[0042] Compound 25g of 1,4-bis(2-hydroxymethyl)piperazine with 15g of N-hydroxyethylpiperazine (the total amine concentration is 40%), add 5g of polyethylene glycol dimethyl ether and 0.1g of polydimethyl ether base siloxane, add 40g of distilled water and stir to dissolve, add phosphoric acid to adjust the pH to 6.2, then add distilled water to quantify to 100g.

[0043] Take 50ml of the above solution for absorption at 50°C. After the absorption liquid reaches saturation, perform thermal desorption at 102°C. Control the total flow rate of the mixed gas to 500mL / min, SO 2 The concentration is 5000mg / m 3 . Absorption is carried out at 50°C, and after the absorption liquid reaches saturation, thermal desorption is carried out at 102°C, and the total flow rate of the mixed gas is controlled at 500mL / min, SO 2 The concentration is 5000mg / m 3 .

[0044]The saturated absorption capacity of the composite desulfurizer in this example is 1.1991mol / L, while the saturated absorption...

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Abstract

The invention discloses a composite piperazine organic amine desulfurizing agent. The desulfurizing agent is prepared by uniformly mixing a main absorbent, a secondary absorbent, an auxiliary absorbent and additives, wherein the main absorbent is dihydroxyalkyl piperazine organic amine, the secondary absorbent comprises alkylol amine, aliphatic amine, alicyclic amine and aromatic amine type organic amine, the auxiliary absorbent is polyether glycol, and the additives comprise acids, water and a defoaming agent. A solidifying point of the composite amine is lower than that of single organic amine, so that system blockage caused by organic amine crystallization in a utilization process is reduced; the secondary absorbent and the main absorbent form absorption-desorption complementation; the auxiliary absorbent has a function of organic combination of a chemical absorption process and a physical absorption process to improve absorption-desorption comprehensive performances. According to different chemical components, contents and volumes of to-be-treated flue gas (tail gas), specific substances and consumption quantity of the main absorbent, the secondary absorbent and the auxiliary absorbent can be regulated to obtain favorable composite desulfurization effects.

Description

technical field [0001] The invention belongs to the technical field of flue gas (tail gas) desulfurization to be treated, in particular to a method for removing gas SO in flue gas (tail gas) to be treated 2 Compound piperazine organic amine desulfurizer. Background technique [0002] SO 2 It is one of the main pollutants in the atmosphere. It can not only endanger human health, but also form acid rain and destroy the ecological environment. Therefore, how to efficiently remove SO in the flue gas (tail gas) to be treated 2 It is a problem that China urgently needs to solve. The flue gas (tail gas) desulfurization by gypsum method is currently the most mature technology for flue gas (tail gas) desulfurization. The desulfurization efficiency of the limestone / gypsum method is higher than 95%, the utilization rate of the desulfurizer is higher than 90%, the stability is high, the adaptability to coal types is strong, and the raw material is cheap. But it also has disadvantage...

Claims

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Application Information

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IPC IPC(8): B01D53/14
CPCB01D53/1481B01D53/1493B01D2252/202B01D2252/204B01D2252/20447B01D2252/608B01D2258/0283
Inventor 崔鹏陈晓红左永伟窦焰史成武魏凤玉徐洁书吴炳智
Owner HEFEI UNIV OF TECH
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