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Organic solution absorbing sulfur dioxide in gas mixture

An organic solution, sulfur dioxide technology, applied in chemical instruments and methods, dispersed particle separation, separation methods, etc., to achieve the effects of small mass transfer resistance, high desulfurization rate, and rich raw material sources

Active Publication Date: 2013-12-11
徐州大晶新材料科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

We absorb SO in the membrane 2 A lot of experimental research work has been done on composite absorbents, and novel and efficient composite absorbents have been proposed, which are currently used in flue gas purification of SO 2 There is no use and report in the field

Method used

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  • Organic solution absorbing sulfur dioxide in gas mixture
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  • Organic solution absorbing sulfur dioxide in gas mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A performance evaluation method for the application of compound mixed organic solutions in membrane contactors.

[0033] Operating conditions: room temperature (19-22°C), mixed gas pressure 0.11MPa, membrane mass transfer area 1.5 m 2 , the gas flow rate is 0.5-2 L / min, and the liquid flow rate is 200-500mL / min.

[0034] Such as figure 1 shown, respectively from N 2 Gas cylinder 1-1 and SO 2 After the gas in the gas cylinder 1-2 is measured by the gas quality control instrument 2, it enters the mixing and stabilizing tank 3 to form SO containing 0.1%-0.6% (volume percentage). 2 Mixed gas, the mixed gas after the air flow is stabilized enters the membrane contactor 4, and the SO in the mixed gas 2 Diffuse to the other side of the membrane through the membrane pores, be absorbed by the composite desulfurizer, that is, the mixed organic solution mentioned above in the present invention, enter the liquid phase, and the absorbed gas phase is released from the gas outlet ...

Embodiment 2

[0044] The organic solution used to absorb sulfur dioxide in the mixed gas is an aqueous solution of potassium lactate / sodium lactate and ethylenediamine, the total concentration of potassium lactate / sodium lactate and ethylenediamine in the aqueous solution is 0.1~6mol / L, potassium lactate / sodium lactate and ethylenediamine The molar ratio of amine is 1:(0.5~4).

[0045] The performance evaluation method in Example 1 is used for detection.

[0046] Process operating conditions: room temperature, gas phase pressure 0.11MPa, mixed gas SO 2 Content 0.1%-0.6% (volume percentage), membrane mass transfer area 1.5m 2 , gas velocity: 0.5-2L / min, liquid velocity: 200-500mL / min.

[0047] The performance evaluation results of various desulfurizers under various conditions are shown in Table 1.

[0048] Table 1 Performance evaluation results of compound desulfurizer

[0049]

[0050] The results show that the composite desulfurizer has high adaptability, not only adapts to low-con...

Embodiment 3

[0053] The organic solution used to absorb sulfur dioxide in the mixed gas is an aqueous solution of potassium lactate / sodium lactate and methoxyethylamine, the total concentration of potassium lactate / sodium lactate and methoxyethylamine in the aqueous solution is 0.1~6mol / L, potassium lactate / The molar ratio of sodium lactate to methoxyethylamine is 1:(0.5~4).

[0054] The performance evaluation method in Example 1 is used for detection.

[0055] Process operating conditions: room temperature, gas phase pressure 0.11MPa, mixed gas SO 2 Content 0.1%-0.6% (volume percentage), membrane mass transfer area 1.5m 2 , gas velocity: 0.5-2L / min, liquid velocity: 200-500mL / min.

[0056] The performance evaluation results of various desulfurizers under various conditions are shown in Table 2.

[0057] Table 2 Performance evaluation results of compound desulfurizer

[0058]

[0059] The results show that the composite desulfurizer has high adaptability, not only adapts to low-con...

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Abstract

The invention relates to the field of liquid-gas separation, especially to the field of flue gas desulphurization, specifically to an organic solution absorbing sulfur dioxide in a gas mixture. The objective of the invention is to provide a sulfur dioxide absorbent used for absorption of a membrane contactor. The organic solution is composed of lactate and an aqueous solution of organic amine mixed according to a mol ratio of 1: 0.5-4. The compound desulfurizer, i.e., the organic solution, has the advantages of good chemical stability, small foamability, small viscosity and a wide source, easy purchasing and a low price of raw materials. A desulphurization process using the compound desulfurizer has the advantages of a high mass transfer coefficient, no disturbance during flowing of gas and liquid, small mass transfer resistance, a high desulfurization rate, convenience in operation, great operational flexibility, no secondary pollution and stable running in the membrane contactor.

Description

technical field [0001] The invention relates to the field of liquid-gas separation, in particular to the field of flue gas desulfurization, and more specifically relates to an organic solution for absorbing sulfur dioxide in mixed gas. [0002] Background technique [0003] SO in the flue gas of coal-fired power plants and metallurgical industries 2 It is one of the main pollutants in the atmosphere and the source of acid rain. With the increasing requirements of environmental protection on the emission of air pollutants, in the flue gas desulfurization purification, how to reasonably select the desulfurization process to achieve SO 2 Emissions in line with the national emission standards is a key issue for the healthy development of flue gas desulfurization in coal-fired power plants and metallurgical industries. Therefore, various high-performance SO 2 The development of absorbents is one of the research topics in this field. In recent years, composite absorbents have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
Inventor 陆建刚陆春婷陈悦曹馨元张慧许正文
Owner 徐州大晶新材料科技集团有限公司
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