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Halophilic alkalophilic biological desulfurizing treatment process and treatment device

A technology of biological desulfurization and treatment device, which is applied in the field of environmental engineering and can solve problems such as inhibition

Active Publication Date: 2019-09-17
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similarly, the activity of FCC is also inhibited

Method used

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  • Halophilic alkalophilic biological desulfurizing treatment process and treatment device
  • Halophilic alkalophilic biological desulfurizing treatment process and treatment device
  • Halophilic alkalophilic biological desulfurizing treatment process and treatment device

Examples

Experimental program
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Effect test

Embodiment 1

[0078] This embodiment provides a halophilic alkaliphilic biological desulfurization treatment device, such as figure 1 As shown, the device includes a sequentially connected biological purification tower 1, a deep adsorption tower 2, a biological regeneration tower 3 and a sulfur collection tower 4. The sulfur collection tower 4 is connected to the biological purification tower 1, and the above four tower units form a closed liquid circulation system;

[0079] Wherein, the deep adsorption tower 2 and the biological regeneration tower 3 are respectively provided with an aeration device;

[0080] A water pump is provided on the pipeline between the sulfur collection tower 4 and the biological purification tower 1;

[0081] The biological purification tower 1 is provided with an air intake pipeline and an air outlet pipeline, and a branch purification gas pipeline is provided on the air outlet pipeline, which is connected with the deep adsorption tower 2;

[0082] The deep ads...

Embodiment 2

[0085] This embodiment provides a halophilic and alkaliphilic biological desulfurization process, which is carried out using the device in Example 1, including the following steps:

[0086] (1) containing H 2 The S biogas is passed into the biological purification tower 1, and is countercurrently contacted with the absorption liquid to make the H 2 S to HS - Enter the liquid phase, the purified biogas is discharged from the purification tower, and one branch is separated from the purified biogas as the gas supply for the deep adsorption tower;

[0087] (2) The rich HS obtained in step (1) - The liquid enters the deep adsorption tower 2 through gravity flow, and the purified biogas derived from the biological purification tower 1 is used for the HS through the aeration device installed in the tower. - The rich liquid is aerated and stirred to form an anaerobic environment in the deep adsorption tower 2, strengthen the mass transfer of the system, and promote the reaction of ...

Embodiment 3

[0103] In this example, the device provided in Example 1 is used for halophilic and alkaliphilic biological desulfurization.

[0104] H in the biogas treated in this example 2 The S concentration is about 11000ppm, in addition to CH 4 58% with CO 2 32%, other gases accounted for about 10%.

[0105] Start the system according to the scheme of embodiment 2, the amount of biogas intake is 0.65m 3 / h, adjust the liquid flow, so that the H in the biogas purified at the gas outlet of the biological purification tower 2 The S content drops below 10ppm, at this time the liquid flow rate is 0.13m 3 / h.

[0106] In this embodiment, desulfurization biogas purification effect, sulfur generation rate, S 2 o 3 2- and SO 4 2- Generation rate as Figure 7 and Figure 8 Shown: The hydrogen sulfide removal rate of the system reaches over 99.9%, and the gas H 2 The S content is reduced to below 10ppm, and the biogas is fully purified. The maximum elemental sulfur generation rate r...

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Abstract

The invention relates to a halophilic alkalophilic biological desulfurizing treatment process and a treatment device. The device comprises a biological purification tower, a deep adsorption tower, a biological regeneration tower and a sulfur collection tower. The process comprises the following steps of: absorbing H2S in biogas through an absorption liquid containing sulfur oxidizing microorganisms, and then stirring a liquid phase in an anaerobic environment to strengthen the absorption of HS<-> by the sulfur oxidizing microorganisms; and under the condition of oxygen enrichment, oxidizing the HS<-> by the sulfur oxidizing microorganisms to generate elemental sulfur, and recovering the elemental sulfur. According to the invention, by adding the anaerobic strengthening treatment step in the biological desulfurizing process, the absorption of the HS<-> by the sulfur oxidizing microorganisms and the selection of HS<-> oxidation paths are strengthened, the chemical oxidation process existing in the biogas biological desulfurizing process is effectively weakened, the formation of S2O3<2->and SO4<2-> in the treatment process is greatly reduced, the generation rate of the elemental sulfur is increased, the requirement on liquid alkali for adjusting pH is reduced, and the treatment process has good economic benefits and application prospect.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and in particular relates to a halophilic and alkaliphilic biological desulfurization treatment process and a treatment device. Background technique [0002] Desulfurization of natural gas and biogas can not only obtain clean gas, but also recover sulfur. Therefore, desulfurization of such gases is an important technical means that kills two birds with one stone and turns waste into treasure. As early as the middle of the last century, France relied on the desulfurization of natural gas from the Lac gas field and became the world's third largest sulfur producer. In my country, 1 / 3 of sulfur comes from natural gas desulfurization in Sichuan. [0003] After decades of development, a variety of mature H 2 S removal technology. The most widely used are traditional physical and chemical methods, and the emergence of biological desulfurization technology has strongly promoted the development...

Claims

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Application Information

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IPC IPC(8): C10L3/10B01D53/84B01D53/52
CPCB01D53/52B01D53/84B01D2251/95C10L3/103Y02E50/30Y02A50/20
Inventor 穆廷桢邢建民杨茂华苗得露
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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