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

6 Cites 11 Cited by

AI-Extracted 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...

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.

Application Domain

Gas treatmentDispersed particle separation

Technology Topic

Exhaust gasDefoaming Agents +8

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Examples

Experimental program(5)

Example Embodiment

[0033] Example 1

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

[0035] Take 50ml of the above solution for absorption at 50℃. After the absorption solution reaches saturation, perform thermal desorption at 102℃, and control the total flow 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 embodiment is 1.7059 mol/L, while the saturated absorption capacity of 50% 1,4-bis(2-hydroxyethyl)piperazine aqueous solution is 1.5792 mol/L when used as the desulfurizer. The saturated absorption capacity of the desulfurizer has increased by 8.02%; the desorption rate of the composite desulfurizer in this example is 91.10%, and the desorption rate when a 40% 1,4-bis(2-hydroxyethyl)piperazine aqueous solution is used as the desulfurizer At 87.24%, the desorption rate of the composite desulfurizer increased by 4.42%.

Example Embodiment

[0037] Example 2

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

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

[0040] The saturated absorption capacity of the composite desulfurizer in this example is 0.8093 mol/L, and when 22% 1,4-bis(2-hydroxypropyl)piperazine aqueous solution is used as the desulfurizer, the saturated absorption capacity is 0.6414 mol/L. The saturated absorption capacity of the desulfurizer increased by 26.18%; the desorption rate of the composite desulfurizer in this example was 88.4%, while the 22.5% 1,4-bis(2-hydroxypropyl)piperazine aqueous solution was used as the desulfurizer. At 86.51%, the desorption rate of the composite desulfurizer increased by 2.18%.

Example Embodiment

[0041] Example 3:

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

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

[0044] The saturated absorption capacity of the composite desulfurizer in this example is 1.1991 mol/L, and when 30% 1,4-bis(2-hydroxymethyl)piperazine aqueous solution is used as the desulfurizer, the saturated absorption capacity is 1.1536 mol/L. The saturated absorption capacity of the desulfurizer has increased by 3.94%; the desorption rate of the composite desulfurizer in this example is 90.88%, and the desorption rate when a 40% 1,4-bis(2-hydroxymethyl)piperazine aqueous solution is used as the desulfurizer At 88.46%, the desorption rate of the composite desulfurizer increased by 2.74%.

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Classification and recommendation of technical efficacy words

Good water solubility
low steam pressure

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

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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