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Method and system for biogas desulfurization using electrolysis and air flotation to treat biogas slurry

A biogas desulfurization and biogas slurry technology, which is applied in chemical instruments and methods, flotation water/sewage treatment, sedimentation treatment, etc., can solve the problems of cumbersome operation, high desulfurization cost, and poor control, and achieve simple process and desulfurization effect Obvious, easy-to-operate effect

Active Publication Date: 2020-01-07
SHANDONG MINHE BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the problems of high energy consumption and poor control in the desulfurization method in the prior art; cumbersome operation, low desulfurization efficiency; Method and system for treating biogas slurry for biogas desulfurization

Method used

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  • Method and system for biogas desulfurization using electrolysis and air flotation to treat biogas slurry
  • Method and system for biogas desulfurization using electrolysis and air flotation to treat biogas slurry
  • Method and system for biogas desulfurization using electrolysis and air flotation to treat biogas slurry

Examples

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Embodiment 1

[0051] Example 1 A system for biogas desulfurization using electrolysis and air flotation to treat biogas slurry

[0052] A biogas desulfurization system using electrolysis and air flotation to treat biogas slurry, which includes a sedimentation tank 1, an electrolytic cell 2, an air flotation machine 3, a desulfurization tower 5, a water condenser 6, and a dry desulfurization tank 7; it is characterized in that the Sedimentation tank 1 has a biogas slurry inlet and a biogas slurry outlet; electrolytic tank 2 includes 2 biogas slurry inlets and a biogas slurry outlet, a biogas inlet and a biogas outlet, and the air flotation machine 3 includes a biogas slurry inlet and a biogas slurry outlet; the desulfurization tower 5 includes a biogas inlet and a biogas outlet, a biogas inlet and a biogas outlet; the condenser 6 includes a biogas inlet and a biogas outlet; the dry desulfurization tank 7 includes a biogas inlet and a biogas outlet The biogas slurry inlet of the sedimentation...

Embodiment 2

[0053] Example 2 A system for biogas desulfurization using electrolysis and air flotation to treat biogas slurry

[0054] A biogas desulfurization system using electrolysis and air flotation to treat biogas slurry, which includes a sedimentation tank 1, an electrolytic cell 2, an air flotation machine 3, a desulfurization tower 5, a water condenser 6, and a dry desulfurization tank 7; it is characterized in that the Sedimentation tank 1 has a biogas slurry inlet and a biogas slurry outlet; electrolytic tank 2 includes 2 biogas slurry inlets and a biogas slurry outlet, a biogas inlet and a biogas outlet, and the air flotation machine 3 includes a biogas slurry inlet and a biogas slurry outlet; the desulfurization tower 5 includes a biogas inlet and a biogas outlet, a biogas inlet and a biogas outlet; the condenser 6 includes a biogas inlet and a biogas outlet; the dry desulfurization tank 7 includes a biogas inlet and a biogas outlet The biogas slurry inlet of the sedimentation...

Embodiment 3

[0059] Example 3 A method of biogas desulfurization using electrolysis and air flotation to treat biogas slurry

[0060] A method of biogas desulfurization using electrolysis and air flotation to treat biogas slurry is as follows:

[0061] (1) The fresh biogas slurry discharged from the anaerobic fermentation tank first enters the sedimentation tank 1 through the biogas slurry transportation pipeline through the biogas slurry delivery pump, and settles for 24 hours, which is used for preliminary precipitation to remove large particles of impurities in the biogas slurry.

[0062] (2) The biogas slurry comes from the sedimentation tank 1 when it is used for the first time, and then the biogas slurry is recycled. The electrolytic cell 2 is equipped with an anode and a negative electrode made of metal materials. There are multiple anodes, usually 2 to 6. The metal ions in the biogas slurry gather at the anode when the electricity is applied. The electrolytic cell 2 is a closed ele...

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Abstract

The invention relate to a system for desulfurizing biogas by use electrolysis and air floatation to treat biogas slurry, and the system comprises a sedimentation tank, an electrolytic cell, an air floatation machine, a desulfurizing tower, a water condense and a dry desulfurizing tank. The biogas slurry sequentially passes through the electrolytic cell and reacts with the biogas slurry in the electrolytic cell, then enters the desulfurizing tower, and then enters the condenser and the dry desulfurizing tank in sequence, then clean biogas is discharged, the biogas slurry sequentially passes through the sedimentation tank, the electrolytic cell and the air floatation machine, then is sprayed into the desulfurizing tower, and then returns to the electrolytic cell for recycling. Through two flow paths of the biogas and the biogas slurry, the biogas and the biogas slurry contact and react in the electrolytic cell and the desulfurizing tower, biogas desulfurizing is completed, and subsequent biogas slurry treatment is facilitated. After passing through the above system, the removal rate of COD in the biogas slurry reaches 28%, and the removal rate of H2S in the biogas is 99.9%.

Description

technical field [0001] The invention belongs to the technical field of large-scale biogas desulfurization using livestock and poultry manure as raw materials, and specifically relates to a method and system for biogas desulfurization by using electrolysis and air flotation to treat biogas slurry. Background technique [0002] For large-scale biogas projects that use livestock and poultry manure as raw materials, the biogas produced by anaerobic fermentation contains a large amount of hydrogen sulfide gas, and its hydrogen sulfide content is usually 1000ppm-5000ppm. Hydrogen sulfide is not only a poisonous and harmful gas, but the sulfur dioxide produced after combustion is highly corrosive to combustion equipment and metal pipes, and is discharged into the air to cause air pollution. Therefore, in order to use biogas safely, it is necessary to desulfurize the biogas before use. [0003] At present, there are two main methods for removing high-concentration hydrogen sulfide ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C10L3/10
CPCC02F1/24C02F1/461C02F1/46104C02F9/00C02F2001/007C02F2301/043C10L3/103
Inventor 董泰丽崔青青孙颖材陈莉
Owner SHANDONG MINHE BIOTECHNOLOGY CO LTD
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