Absorption liquid for gas desulfurization and its application

A technology for absorbing liquid and gas, applied in the field of absorbing liquid, can solve the problems of clogging the absorption tower, slow catalyst regeneration rate and high degradation rate, and achieve the effect of less side reactions, overcoming slow regeneration rate and low degradation rate.

Active Publication Date: 2005-06-01
BEIJING BAIAONA HI TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems of clogged absorption tower, slow catalyst regeneration rate

Method used

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  • Absorption liquid for gas desulfurization and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Prepare gas desulfurization absorption liquid, its composition and content are: sodium carbonate 0.5mol / L, nanometer α-type iron oxide with a diameter of 20-30nm 0.01mol / L, iron fulvic acid 0.01mol / L, methanol 0.05mol / L L, dimethyl sulfoxide 0.01mol / L, the balance is water. The preparation method is simple mixing.

[0033] Use the prepared absorption liquid to remove sulfur in the gas, the specific method is as follows:

[0034] (1) Enter the prepared absorption liquid from the upper part of the absorption tower at a flow rate of 100L / hr, containing 1g / m 3 The hydrogen sulfide nitrogen gas is introduced from the lower part of the absorption tower at a flow rate of 2000L / hr, the gas and liquid flow in reverse, the purified gas is released from the top of the tower, and the absorption liquid flows out from the tower kettle; the temperature of the absorption tower is 30°C, and the pressure is 1 atmosphere;

[0035] (2) The absorption liquid flowing out of the tower kettl...

Embodiment 2

[0042] Prepare gas desulfurization absorption liquid, its composition and content are: sodium carbonate 1mol / L, nanometer α-type iron oxide with a diameter of 30-35nm 0.001mol / L, fulvic acid iron 0.1mol / L, methanol 0.1mol / L , dimethyl sulfoxide 0.05mol / L, and the balance is water. The preparation method is simple mixing.

[0043] Adopt the prepared absorbing liquid to carry out gas desulfurization according to the same method as in Example 1, the difference is that the raw material gas contains 2g / m 3 Hydrogen sulfide nitrogen, the gas flow rate is 1800L / hr.

[0044] The sulfur content in the purified gas was analyzed, and the analysis results are listed in Table 1.

Embodiment 3

[0046] Prepare gas desulfurization absorption liquid, its composition and content are: 0.05mol / L sodium carbonate, 0.02mol / L nano-α-type iron oxide with a diameter of 5-10nm, 0.2mol / L iron humate, and 0.001mol / L formic acid , diethylsulfoxide 0.001mol / L, and the balance is water. The preparation method is simple mixing.

[0047] Using the prepared absorption liquid to carry out gas desulfurization according to the same method as in Example 1, the difference is that the feed gas contains 3g / m 3 Hydrogen sulfide nitrogen, the gas flow rate is 1600L / hr.

[0048] The sulfur content in the purified gas was analyzed, and the analysis results are listed in Table 1.

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Abstract

The present invention discloses one kind of gas desulfurizing absorption liquid and its desulfurizing method. The gas desulfurizing absorption liquid has nanometer alpha- or gamma-ferric oxide and iron chelate as catalyst. In the presence of organic compound and alkali compound and light irradiation, air is introduced and the absorption liquid absorbed inorganic and/or organic sulfide are oxidized into simple substance sulfur. The gas desulfurizing method of the present invention has the advantages of low catalyst consumption, fast regeneration of catalyst, no jamming of the absorption tower, etc.

Description

technical field [0001] The present invention relates to an absorbing liquid for gas desulfurization and its application, in particular, the present invention relates to an absorbing liquid for photocatalytically removing inorganic sulfur and / or organic sulfur in industrial feed gas or waste gas and its desulfurization method . Background technique [0002] From the 1950s to the 1970s, the desulfurization method that dominated the field of gas wet desulfurization was Anthraquinone disulponic acid (ADA) oxidation catalytic method. The desulfurization process used sodium carbonate as the absorbent and ADA as the oxidation catalyst, called Stretford process. During the operation of this process, three major shortcomings were gradually exposed: one is the small sulfur capacity, so the desulfurization liquid circulation volume is large, and the energy consumption is high; the second is the sulfur analysis process is slow, so the desulfurization efficiency is limited; Sodium sulf...

Claims

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Application Information

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IPC IPC(8): B01D53/14B01D53/48B01D53/78
Inventor 杨军杨晓进袁其朋
Owner BEIJING BAIAONA HI TECH
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