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High-value utilization process for in-situ biogas desulfurization comprehensive treatment

A comprehensive treatment and biogas desulfurization technology, applied in biological sludge treatment, gas fuel, petroleum industry, etc., can solve the problems of short service life of desulfurizer, high operating cost, frequent replacement, etc., and achieve low construction investment and low operating cost , the effect of reducing workload

Inactive Publication Date: 2012-06-27
北京合百意可再生能源技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an in-situ biogas desulfurization comprehensive treatment high-value utilization process, which solves the problems of short service life of desulfurizers, frequent and inconvenient replacement, and high operating costs in existing biogas desulfurization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0019] Application examples of biogas engineering

[0020] Dissolve 300kg desulfurizer into water for the first time, and add 450m 3 in a fermenter (approximately 13-25 tons of dry matter, and the fermentation raw material is cow dung, chicken manure and other livestock and poultry manure), and then stirred for 5 minutes to make the desulfurizer evenly distributed in the fermenter, so that the H produced in the fermenter 2 S reacts with desulfurizers to form insoluble FeS precipitates, which are removed with the discharge of biogas residues, thereby realizing in-situ biogas desulfurization. After adding the desulfurizer for the first time, add 1-10kg / T of desulfurizer along with the raw material each time the raw material is added, add more when the sulfur content of the biogas is high, and add less when the sulfur content is low.

[0021] The desulfurization agent formula is: sodium molybdate 17.6g, formaldehyde 2g, gentamicin 0.4g, ferrous sulfate 80g.

[0022] After a one...

Embodiment approach 3

[0029] Application examples of batch fermentation

[0030] Add 1L of high-concentration organic wastewater into ten groups of 1.5L upper and lower suction filter flasks for biogas fermentation. The methane inoculum is 20%, and the total solids of the fermentation are about 1-3% (TS=1-3%). Add 0.5 to 2 g of coupling-type long-acting desulfurizer at one time, shake well and ferment at 30°C. A blank fermentation group without desulfurization agent was used as a control.

[0031] The formula of the first group of coupled long-acting desulfurizers is: sodium molybdate 2.9g, formaldehyde 7g, gentamicin 0.1g, ferric nitrate 90g.

[0032] The formula of the second group of coupled long-acting desulfurizers is: 2.9g of sodium molybdate, 7g of formaldehyde, 0.1g of gentamicin, and 90g of ferric citrate.

[0033] The formula of the third group of coupled long-acting desulfurizer is: sodium molybdate 2.9g, formaldehyde 7g, gentamicin 0.1g, ferrous chloride 90g.

[0034] The formula of ...

Embodiment approach 4

[0043] Examples of Dry Fermentation Applications

[0044] Add 200g of straw to a 2.5L large-mouth glass bottle, add an appropriate amount of inoculum and water, so that the total solid concentration in the fermentation bottle is about 35%, the biogas inoculum is about 20%, and ferment at 30°C. Long-acting desulfurizer 2~6g, the composition of coupling type long-acting desulfurizer is: sodium molybdate 1.82g, gentamicin 0.18g, formaldehyde 16g, ferrous oxalate 30g, ferrous chloride 25g, ferrous carbonate 17g, Iron citrate 10g. When adding, mix the coupling-type long-acting desulfurizer and fermentation raw materials evenly.

[0045] The actual test shows that the coupled long-acting desulfurizer can desulfurize continuously for 4 to 6 months. Make the concentration of hydrogen sulfide in the biogas produced by straw fermentation from 500 to 800 mg / m 3 Drop to 10~50mg / m 3 .

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Abstract

The invention discloses a high-value utilization process for in-situ biogas desulfurization comprehensive treatment, which solves the problems of short service cycle and frequent and inconvenient replacement of a desulfurizer, high running cost and the like in the conventional biogas desulfurization. The process comprises the following operating steps that: a coupling type long-acting desulfurizer is added into a biogas fermentation device through a dosing device to make desulfurization and raw material fermentation carried out synchronously; and the desulfurizer inhibits the activity of sulfureted hydrogen generating bacteria in the biogas fermentation device to reduce the generated sulfureted hydrogen in the in-situ biogas, and is also reacted with the sulfureted hydrogen generated in the fermentation process to generate water insoluble sulphide, and precipitate is discharged along with discharged materials, so that the in-situ biogas is comprehensively treated and desulfurized in the biogas fermentation device, and then is directly output and utilized. The process has the advantages of simple process flow, convenient operation, improvement of resource utilization values, obvious improvement of desulfurization efficiency, equipment cost conservation, low running cost and the like; and the service life of the biogas fermentation device and an output pipeline is prolonged.

Description

Technical field: [0001] The patent of the present invention relates to an in-situ biogas desulfurization comprehensive treatment high-value utilization process, which is especially suitable for various anaerobic fermentation processes with a fermentation concentration not greater than 35% (ie, TS≤35%). The process can be used for in-situ desulfurization of large, medium and small anaerobic fermentation devices and household biogas digesters. technical background: [0002] Hydrogen sulfide is a highly toxic gas that seriously endangers the safety of humans and animals. Due to the popularity of feed feeding, the sulfur content in livestock and poultry manure continues to increase, resulting in the hydrogen sulfide content in biogas generally changing from the original 1 to 2g / m 3 Rise to 3 ~ 4g / m 3 , biogas desulfurization is more urgent. In my country, whether it is a large or medium-sized biogas project or rural household biogas, the current desulfurization of biogas is s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P5/02C02F11/04C10L3/10
CPCY02E50/343Y02E50/30
Inventor 袁月祥颜开刘晓风闫志英
Owner 北京合百意可再生能源技术有限公司
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