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In-situ biogas coupling type long-acting desulfurizer

A desulfurizer and coupling type technology, applied in the field of in-situ biogas coupling type long-acting desulfurizer, can solve the problems of frequent replacement, inconvenience, short service cycle, etc., and achieve the effects of low operating cost, cost reduction and corrosion reduction.

Inactive Publication Date: 2012-07-11
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 coupling type long-acting desulfurizer that is added to a biogas fermentation device to synchronize desulfurization and raw material fermentation, which solves the problem of short service life, frequent replacement and inconvenience of existing biogas desulfurizers question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0016] Application examples of biogas engineering

[0017] 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 generated 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.

[0018] The desulfurization agent formula is: sodium molybdate 17.6g, formaldehyde 2g, gentamicin 0.4g, ferrous sulfate 80g.

[0019] After a on...

Embodiment approach 2

[0021] Application examples of household biogas digesters

[0022] 8m in different villages 3 2Kg, 4kg, and 8kg of desulfurizers were put into the household biogas digester (the fermentation raw material is a mixture of organic matter such as pig manure, straw, and vegetable leaves, containing about 0.20-0.48 tons of dry matter), and stirred evenly.

[0023] The formula of the desulfurizer is: 0.5g of sodium molybdate, 4.4g of formaldehyde, 0.1g of gentamicin, 30g of ferrous oxalate, 25g of ferric chloride, 25g of ferrous sulfate, and 15g of ferrous carbonate.

[0024] The experiments of each group showed that adding 2-8Kg desulfurizer into the biogas digester can make the biogas digester desulfurize continuously for 3-6 months. H in the biogas 2 S concentration from 2000 to 3000mg / m 3 Drop to 100~1000mg / m 3 , The removal rate can reach more than 95%.

[0025] The desulfurization effect of the household pool is better at the initial stage of adding, and the desulfurizatio...

Embodiment approach 4

[0041] Examples of Dry Fermentation Applications

[0042] 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. Coupling type long-acting desulfurizer 2~6g, formula of in-situ coupling type long-acting desulfurizing agent is: sodium molybdate 1.82g, gentamicin 0.18g, formaldehyde 16g, ferrous nitrate 20g, ferrous chloride 20g, ferric sulfate 17g, ferric nitrate 15g, ferric citrate 10g. When adding, mix the compound coupling type long-acting desulfurizer and fermentation raw materials evenly.

[0043] Tests have shown that the in-situ 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 an in-situ biogas coupling type long-acting desulfurizer, which is added into a biogas fermentation device to make desulfurization and raw material fermentation carried out synchronously, and solves the problems of short service cycle, frequent and inconvenient replacement and the like of the conventional biogas desulfurizer. The in-situ biogas coupling type long-acting desulfurizer adopts the technical key points that: the desulfurizer comprises a sulfate reducing bacteria inhibitor and a sulfureted hydrogen removing agent of which the mass ratio is (1-4): (19-16); and the mass ratio of the desulfurizer to the dried raw materials is (1-35): 1,000. The in-situ biogas coupling type long-acting desulfurizer directly added into the biogas fermentation device to desulfurize the in-situ biogas, and has the outstanding advantages of abundant raw materials, obvious improvement on desulfurization efficiency, simple process, convenient operation, economy and the like which cannot be matched by other desulfurizers; and through a process of coupling the biology with chemistry, the in-situ biogas coupling type long-acting desulfurizer comprehensively treats and removesthe sulfureted hydrogen in the in-situ biogas in a biogas pool, and is a new trend of desulfurizing the biogas.

Description

Technical field: [0001] The patent of the invention relates to an in-situ biogas-coupled long-acting desulfurizer that is directly added to a biogas fermentation device for desulfurization, and can be used for in-situ biogas desulfurization of large, medium and small anaerobic fermentation tanks 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 still dominated by traditional dry desulfurization (the desulfurizer is ferric oxide); some biogas projects abroad use ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L3/00C07C9/04C07C7/148
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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