Aeration-free biological desulfurization system and treatment method

A technology of biological desulfurization and biological oxidation, which is applied in the field of environmental engineering, can solve the problems of difficulty in meeting industrial demands, low production rate of elemental sulfur, decreased production rate of elemental sulfur, etc., and achieves the effects of simple structure, convenient processing and reduced operating energy consumption.

Pending Publication Date: 2021-03-12
INST OF PROCESS ENG CHINESE ACAD OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the ORP is too high, the generated elemental sulfur will continue to be oxidized to sulfate, which will reduce the production rate of elemental sulfur; if the ORP is too low, the growth of microorganisms will be slow, and the production rate of elemental sulfur will be too low to meet industrial needs.

Method used

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  • Aeration-free biological desulfurization system and treatment method
  • Aeration-free biological desulfurization system and treatment method
  • Aeration-free biological desulfurization system and treatment method

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A biological desulfurization system, comprising an absorption tower 1, a biological oxidation reactor 4, and a sulfur separator 5, the bottom of the absorption tower 1 is connected to the sulfur separator 5 through the biological oxidation reactor 4, and the liquid outlet in the middle of the sulfur separator 5 (No. The second liquid outlet 13) is connected with the spray device 3 at the top of the absorption tower 1.

[0042] Biooxidation reactor 4 comprises biooxidation reactor body, ORP value detector 7, pH value detector 8 and temperature detector 9, and ORP value detector 7, pH value detector 8, temperature detector 9 all react with biological oxidation connected to the body of the device.

[0043] The bottom of the biooxidation reactor body is provided with a slope; the upper end of the biooxidation reactor body is provided with an opening.

[0044] The lower end of the absorption tower 1 is provided with an air inlet 10, the top of the absorption tower 1 is prov...

Embodiment 2

[0047] Adopt a kind of biological desulfurization system without aeration of embodiment 1, carry out biological desulfurization method for hydrogen sulfide-containing simulated gas:

[0048] (1) The hydrogen sulfide content in the simulated gas is 8000ppm, nitrogen accounts for 55%, and carbon dioxide accounts for 45%. The flow rate is 500L / h, and it is passed into the absorption tower 1. The hydrogen sulfide in the gas is absorbed by the lye, and the purified gas is discharged from the absorption tower. 1 Discharge from the top; absorbing lye is a buffer solution prepared by sodium carbonate-sodium bicarbonate, the pH is 9.0, and the concentration of sodium ions is 1.0mol / L;

[0049] (2) The high-sulfur solution after absorbing hydrogen sulfide flows into the biological oxidation reactor 4 to carry out sulfur oxidation reaction, and oxidizes hydrogen sulfide to elemental sulfur by sulfur-oxidizing microorganisms, forming an elemental sulfur layer on the upper layer of the solu...

Embodiment 3

[0056] Adopt a kind of biological desulfurization system without aeration of embodiment 1, carry out biological desulfurization method for high-sulfur biogas:

[0057] (1) The content of methane in the biogas is 60%, the content of carbon dioxide is 40%, and the content of hydrogen sulfide is 5000ppm. It is passed into the absorption tower 1 at a flow rate of 600L / h. The hydrogen sulfide in the gas is absorbed by the lye, and the purified gas passes through the absorption tower 1 Discharge from the top; absorbing lye is a buffer solution prepared by sodium carbonate-sodium bicarbonate, with a pH of 9.5 and a sodium ion concentration of 1.0mol / L;

[0058] (2) The high-sulfur solution after absorbing hydrogen sulfide flows into the biological oxidation reactor 4 to carry out sulfur oxidation reaction, and oxidizes hydrogen sulfide to elemental sulfur by sulfur-oxidizing microorganisms, forming an elemental sulfur layer on the upper layer of the solution;

[0059] Wherein, the mi...

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Abstract

The invention relates to an aeration-free biological desulfurization system and a treatment method. The aeration-free biological desulfurization system comprises an absorption tower, a biological oxidation reactor and a sulfur separator, the biological oxidation reactor comprises an ORP value detector, a pH value detector and a temperature detector, the ORP value detector, the pH value detector and the temperature detector are all connected with a biological oxidation reactor body, and an aeration device is not arranged; hydrogen sulfide is absorbed by alkali liquor in an absorption unit to form hydrosulfide, a high-sulfur solution containing the hydrosulfide enters a biological oxidation reactor, the hydrosulfide is firstly oxidized into elemental sulfur by sulfur-oxidizing microorganismson the surface layer of the solution, elemental sulfur particles are subjected to sedimentation and gravity separation in a sulfur separator, and a regenerated solution returns to an absorption tower, and the absorption cycle is started. Dissolved oxygen in a surface solution of the biological oxidation reactor is just provided for appropriate oxidation-reduction potential of microorganisms, hydrosulfide is oxidized into elemental sulfur, aeration is not needed, and the operation cost of biological desulfurization is greatly reduced.

Description

technical field [0001] The invention relates to the field of environmental engineering, in particular to a biological desulfurization system and a treatment method without aeration. Background technique [0002] Hydrogen sulfide is a colorless, toxic gas with the smell of rotten eggs, which often exists in natural gas, biogas, refinery gas, etc. Hydrogen sulfide not only has a strong corrosive effect on pipelines and equipment, but also produces sulfur dioxide, an important cause of acid rain and smog. In recent years, as my country's environmental protection emission requirements have become increasingly stringent, it has become increasingly important to effectively desulfurize gases containing hydrogen sulfide. Compared with traditional physical and chemical methods, biological desulfurization technology has the advantages of mild conditions, no secondary pollution, and no clogging of the system. Biological desulfurization technology can quickly absorb the hydrogen sulfi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/52C10L3/10C12M1/34C12M1/00C12P3/00
CPCB01D53/75B01D53/52C10L3/103C12M29/18C12M41/12C12M41/26C12M41/28C12M45/00C12M47/10C12P3/00
Inventor 邢建民杨茂华唐斌宋太沧卞艳飞
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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