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Process for desulphurizing methane through Fe-Cl mixed solution

A mixed solution and biogas technology, applied in the petroleum industry, gas fuel, fuel and other directions, can solve the problems of incomplete absorption of lye, non-renewable absorbing liquid, low efficiency of lye wet desulfurization, etc. , Reasonable design effect

Active Publication Date: 2012-11-14
杭州坚膜新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a Fe—Cl mixed solution absorption and electrochemical regeneration method for desulfurization of biogas in view of the problems of low desulfurization efficiency of lye wet method, incomplete lye absorption and non-renewable absorption liquid in the above method craft

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  • Process for desulphurizing methane through Fe-Cl mixed solution

Examples

Experimental program
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Effect test

Embodiment 1

[0025] According to the structure shown in Figure 1, this embodiment is a device for absorbing hydrogen sulfide in biogas in the desulfurization tower: there are biogas inlet pipe 1, rotating bubble cup 2, atomizing nozzle 3, demister 4, biogas outlet pipe 5, absorption Tail liquid conduit 6, water pump 7 for absorbing tail liquid entering the sedimentation tank, and regeneration absorption liquid conduit 20; sedimentation tank 8, sulfur mud tank 9, sulfur mud conduit 10, water pump 11 for absorbing tail liquid entering the electrolyzer, and absorption tail liquid conduit 12 , the tail liquid absorption conduit 6 is connected to the sedimentation tank 8; the bucket center of the sulfur sludge tank 9 is connected to the sulfur sludge conduit 10. The regenerated absorption liquid conduit 20 is connected to the top of the desulfurization tower and the atomizing nozzle installed on the inner wall of the tower; the demister 4 is above the atomizing nozzle on the top of the tower and...

Embodiment 2

[0031]According to the flowchart structure diagram shown in accompanying drawing 1, the same biogas in embodiment 1 was subjected to treatment test.

[0032] The Fe—Cl mixed solution is used as the absorption liquid, and the Fe in the mixed solution 3+ and Fe 2+ The concentration is 1.2mol / L, where Fe 2+ The proportion of Fe element in the absorption liquid system is 10%, and the concentration range of HCl is 4.0mol / L; when the volume of the absorption liquid in the desulfurization tower reaches 1 / 3 of the internal volume of the desulfurization tower, open the atomization nozzle and the biogas inlet valve , let the rotating bubbling cup bubble with a bubble diameter of 0.2~2.0 mm, the rotation speed of the rotating bubbling cup is about 5000rpm, and the residence time of the biogas in the tower is about 5 minutes; the temperature range of the absorption liquid: 80 ℃; the absorption liquid and Biogas formation countercurrent contact;

[0033] (2) The biogas after the desulfu...

Embodiment 3

[0037] According to the flow chart shown in Figure 1, the treatment test was carried out relative to the biogas with higher sulfur content in Example 1.

[0038] The Fe—Cl mixed solution is used as the absorption liquid, and the Fe in the mixed solution 3+ and Fe 2+ The concentration is 1.5mol / L, where Fe 2+ The proportion of Fe element in the absorption liquid system is 15%, and the concentration range of HCl is 5.0mol / L; when the volume of the absorption liquid in the desulfurization tower reaches 1 / 2 of the internal volume of the desulfurization tower, open the atomization nozzle and the biogas inlet valve , let the rotating bubbling cup bubble with a bubble diameter of 0.2~2.0 mm, the rotation speed of the rotating bubbling cup is about 6000rpm, and the residence time of the biogas in the tower is about 6 minutes; the temperature range of the absorption liquid: 70 ℃; the absorption liquid and Biogas formation countercurrent contact;

[0039] (2) The biogas after the des...

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Abstract

The invention discloses the technical field of methane purification, in particular a process for removing H2S in large and medium-sized methane projects through a Fe-Cl mixed solution absorption and electrochemical regeneration method. According to the process, an Fe-Cl mixed solution is adopted as absorption liquid, and an atomizing nozzle and a methane inlet valve are opened after the volume of the absorption liquid in a desulfurizing tower reaches to a certain volume in the desulfurizing tower, so that the absorption liquid and methane form countercurrent contact; the methane passing through the desulfurizing tower flows out through an outlet of a demister; the absorption liquid which absorbs sulphur-containing substances in the methane is precipitated, solid contents are removed, and the liquid is electrolyzed in an anode chamber of an electrolytic cell; and the electrolyzed liquid is returned to the desulfurizing tower so as to be used as the absorption liquid. The process has the advantages that the design is reasonable, the process is feasible, the operation is simple and convenient, the absorption effect is high, the absorption liquid is renewable, a by-product hydrogen can be used as energy, the chemical absorption liquid can be recycled, and the absorption speed is faster.

Description

technical field [0001] The invention relates to the technical field of biogas purification, in particular to a Fe-Cl mixed solution absorption and electrochemical regeneration method for removing H in large and medium-sized biogas projects. 2 S craft. technical background [0002] With the deepening development of the development and utilization of renewable energy in my country, the construction and retention of large and medium-sized biogas projects in the country continue to increase. During the anaerobic fermentation of raw materials in large and medium-sized biogas projects to generate biogas, certain harmful hydrogen sulfide gas will also be produced. The presence of hydrogen sulfide greatly limits the widespread use of biogas as a renewable biomass energy source. Hydrogen sulfide is a toxic gas with a smell of rotten eggs. Human body will cause adverse reactions after inhalation, and severe cases will be life-threatening; this gas has a strong corrosive effect on co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10
Inventor 陈锋涛张云飞
Owner 杭州坚膜新材料有限公司
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