Biological desulfurization integrated system and method for hydrogen sulfide-containing gas

A biological desulfurization and biological technology, applied in the field of environmental engineering, can solve the problems of complex control, large area and many equipment, and achieve the effect of reducing the difficulty of control, reducing the area and convenient processing.

Pending Publication Date: 2021-03-16
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

[0005] In view of the problems of complex control of sulfur oxidation and sulfur separation process in the prior art, many equipments, large floor space, etc., the present invention integrates the process of biological oxidation and sulfur sedimentation into one reactor, and develops an integrated biological desulfurization system

Method used

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  • Biological desulfurization integrated system and method for hydrogen sulfide-containing gas
  • Biological desulfurization integrated system and method for hydrogen sulfide-containing gas
  • Biological desulfurization integrated system and method for hydrogen sulfide-containing gas

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A biological desulfurization system, comprising an absorption tower 1 and a biological sulfur oxidation-sulfur separation integrated device 4, the bottom end of the absorption tower 1 is connected to the lower end of the biological sulfur oxidation-sulfur separation integrated device 4, and the middle end of the biological sulfur oxidation-sulfur separation integrated device 4 It is connected with the top of absorption tower 1.

[0042] The biosulfur oxidation-sulfur separation integrated device 4 includes a device body, in which a biosulfur oxidation zone and a sulfur separation zone are arranged sequentially from left to right, and a first air inlet 14 and a feed inlet are arranged on the left side of the device body 15. The first air inlet 14 is set above the feed port 15, and a diversion cylinder 7 is provided inside the biosulfur oxidation zone. There are intervals between the upper and lower ends of the diversion cylinder 7 and the device body. The diversion cylind...

Embodiment 2

[0050] Using the integrated biological desulfurization system for hydrogen sulfide-containing gas in Example 1, the height of the isolation plate 8 in this example is 2 / 3 of the height of the device body.

[0051] A biological desulfurization method for simulated gas containing hydrogen sulfide:

[0052] (1) The hydrogen sulfide content in the simulated gas is 10000ppm, and the rest is nitrogen, which is passed into the absorption tower 1 at a flow rate of 500L / h. The hydrogen sulfide in the gas is absorbed by the lye, and the purified gas is discharged from the top of the absorption tower 1; the absorption liquid The buffer solution configured for sodium carbonate-sodium bicarbonate has a pH of 9.0 and a sodium ion concentration of 1.0mol / L;

[0053] (2) The high-sulfur solution after absorbing hydrogen sulfide flows into the biosulfur oxidation zone in the biosulfur oxidation-sulfur separation integrated device 4 to carry out sulfur oxidation reaction. Under the condition of...

Embodiment 3

[0058] Using the integrated system for biological desulfurization of hydrogen sulfide-containing gas in Example 1, the height of the isolation plate 8 is 1 / 2 of the height of the device body.

[0059] A biological desulfurization method for natural gas containing hydrogen sulfide:

[0060] (1) The content of methane in natural gas is 90%, that of ethane is 5.5%, and that of hydrogen sulfide is 10,000ppm. The flow rate of 600L / h is passed into the absorption tower 1. The hydrogen sulfide in the gas is absorbed by the lye, and the purified gas is absorbed from the absorption tower. The top of the tower 1 is discharged; the absorption liquid is a buffer solution configured by sodium carbonate-sodium bicarbonate, the pH is 9.3, and the concentration of sodium ions is 0.9mol / L;

[0061] (2) The high-sulfur solution after absorbing hydrogen sulfide flows into the biosulfur oxidation zone in the biosulfur oxidation-sulfur separation integrated device 4 to carry out sulfur oxidation r...

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Abstract

The invention relates to a biological desulfurization integrated system and method for hydrogen sulfide-containing gas, the biological desulfurization integrated system comprises an absorption tower and a biological sulfur oxide separation integrated device, the bottom end of the absorption tower is connected with the lower end of the biological sulfur oxide separation integrated device, and the middle end of the biological sulfur oxide separation integrated device is connected with the top end of the absorption tower; in the reaction process, hydrogen sulfide is absorbed by alkali liquor in the absorption tower to form hydrosulfide, a high-sulfur solution containing the hydrosulfide enters the biological oxidation sulfur separation integrated unit, the hydrosulfide is firstly oxidized into sulfur by microorganisms, and after sulfur particles are subjected to sedimentation and gravity separation, a regenerated solution returns to the absorption tower to restart absorption circulation;according to the invention, the biological oxidation process and the sulfur sedimentation process are integrated in one reactor, so that the occupied area of equipment is remarkably reduced, the operation difficulty is reduced, and the risk that air enters treated gas is reduced; and the system is simple in structure, convenient to process and beneficial to amplification.

Description

technical field [0001] The invention relates to the field of environmental engineering, in particular to an integrated system and method for biological desulfurization of gas containing hydrogen sulfide. 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 abs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/52C10L3/10C12M1/04C12M1/34C12M1/36C12M1/38C12M1/00C12P3/00
CPCB01D53/75B01D53/52C10L3/103C12M41/24C12M41/26C12M41/28C12M27/20C12M27/18C12M29/08C12P3/00
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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