Method and device for removing hydrogen sulfide by methane

A technology for removing hydrogen sulfide and biogas, which is applied in the field of desulfurization of carbon dioxide-rich sulfur-containing gas and biogas desulfurization. The effect of blower, simplified process equipment, and avoidance of sulfur blockage

Active Publication Date: 2014-07-30
湖州旧馆頔南污水处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the problem of complexing agent or ligand degradation during the long-term operation of the desulfurizer, resulting in high consumption of chemicals, and problems such as product sulfur blockage, and difficulties in sulfur separation and sedimentation on the operating device, etc.

Method used

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  • Method and device for removing hydrogen sulfide by methane
  • Method and device for removing hydrogen sulfide by methane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] like figure 1 In the biogas purification and hydrogen sulfide removal method shown, the biogas enters the absorption tower 1 from the bottom a, and injects Na with a pH of 8.5 into the upper inlet b. 2 CO 3 Alkaline countercurrent contact, absorb the H 2 S, the desulfurization efficiency is up to 99.9%, and the purified biogas is discharged from the top of the tower; the rich liquid that has absorbed hydrogen sulfide enters the inlet d of the regeneration tower 3 through the rich liquid pump 2, and is fed from the upper part of the regeneration tower with a particle size of 1-5mm Iron ore, contacting with the rich liquid countercurrently produces a displacement reaction, so that the lye can be regenerated; the regenerated desulfurization liquid is first subjected to the action of the ultrasonic instrument 4 to enhance the stripping of the product sulfur, FeS and other precipitates from the lye, and then enters the precipitation separation The device 5 stands still to ...

Embodiment 2

[0027] like figure 2 In the biogas purification and hydrogen sulfide removal method shown, the biogas enters the absorption tower 1 from the bottom a, and is sprayed into the K with a pH of 9 from the upper inlet b. 2 CO 3 The lye is contacted in countercurrent to absorb the hydrogen sulfide in it, the desulfurization efficiency reaches 99.99%, and the purified biogas is discharged from the top of the tower; the absorbed H 2 The rich solution of S enters the inlet d of the regeneration tower 3 through the rich solution pump 2, and iron ore with a particle size of 5-10mm is put in from the upper part of the regeneration tower 3, and an ultrasonic device 4 is installed at the lower part of the regeneration tower 3 to give The continuous action of ultrasonic waves accelerates the replacement reaction between iron ore and rich liquid, so that the alkali liquor can be regenerated; the regenerated desulfurized liquid enters the precipitation separation device 5 from f to stand sti...

Embodiment 3

[0029] This example is the same as Example 1, except that the desulfurization solution used is Na with a pH of 8. 2 CO 3 with K 2 CO 3 Mixed lye, the desulfurization efficiency is 99.8%; the particle size of the iron ore used is 20-30mm.

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Abstract

The invention relates to a method and a device for removing hydrogen sulfide by methane. The method comprises the following steps: (1) washing for absorbing methane by using Na2CO3, K2CO3 or a mixture of Na2CO3 and K2CO3 as a sulfur removal absorption solution; (2) performing replacement reaction on the sulfur removal rich solution obtained in the step (1) and solid particles which have the particle size of 1-30mm and contain iron oxide or iron element, and regenerating to obtain regenerated Na2CO3 or K2CO3; (3) performing sulfur recovery and sulfur removal barren solution recycling on a product obtained in the step (2). According to the method, the alkaline liquor absorption and the iron ore replacement regeneration are carried out by unit, so that the problems of deposition, blockage and the like of sulfur in an absorption tower caused by high iron ion concentration during synchronous adding of alkaline liquor and iron ore is avoided; the iron ore replaces iron salt and is cheap and easily available, so that the sulfur removal cost is remarkably reduced; simple equipment is provided for purifying carbon dioxide-rich sulfur-containing gas.

Description

technical field [0001] The invention relates to a method and device for removing hydrogen sulfide from biogas, in particular to a method for removing hydrogen sulfide from carbon dioxide-rich and sulfur-containing gas, and belongs to the field of gas purification. Background technique [0002] In recent years, with the advancement of landfill construction and the rapid development of anaerobic digestion technology for organic waste and high-concentration organic wastewater at home and abroad, the development and utilization of clean biomass energy (biogas) produced thereby has also developed rapidly. However, raw biogas is a mixed gas, mainly containing CH 4 and CO 2 , also contains a small amount of water vapor, H 2 Unusable harmful gases such as S, these impurities have seriously affected the recovery and utilization of biogas. Although H 2 The S content varies due to different fermentation materials, but it must be removed before biogas utilization to avoid corrosion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10B01D53/78B01D53/52
Inventor 张书廷张利亚
Owner 湖州旧馆頔南污水处理有限公司
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