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In-situ biogas desulfurizer

A biogas desulfurization and desulfurization agent technology, applied in the direction of gas fuel, waste fuel, organic chemistry, etc., can solve the problems of short service life, inconvenience, frequent replacement, etc., and achieve the effect of reducing corrosion, simple process flow and low operating cost

Inactive Publication Date: 2010-05-12
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 desulfurizer that can be added to a biogas fermentation device to synchronize desulfurization and raw material fermentation, which solves the problems of short service life, frequent replacement and inconvenience in existing biogas desulfurizers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0015] Application examples of biogas engineering

[0016] Dissolve 90kg of desulfurizer into water for the first time, and add 100m 3 in a fermenter (approximately 3 to 5 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 iron salt every week, then add ferrous oxalate, ferrous chloride, ferrous sulfate, ferrous nitrate, ferrous carbonate, ferric chloride, ferric sulfate, ferric nitrate, lemon Iron salts such as ferric acid, add desulfurizer 1-10kg / T raw material with the raw material every day, add more when the sulfur content of the biogas is high...

Embodiment approach 2

[0020] Application examples of household biogas digesters

[0021] 8m in different villages 3 2Kg, 4kg, and 8kg of in-situ biogas desulfurizer and in-situ biogas desulfurizer are respectively put into the household biogas digester (containing about 0.20-0.48 tons of dry matter, and the fermentation raw material is a mixture of organic matter such as pig manure, straw, and vegetable leaves) at one time. For ferrous sulfate, stir well.

[0022] 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%.

[0023] The desulfurization effect of household ponds is better at the initial stage of addition, and the desulfurization efficiency decreases to a certain extent in the later stage, and the decline is slower when the addition amount is large.

Embodiment approach 3

[0025] Examples of Dry Fermentation Applications

[0026]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. Biogas desulfurizer 2-6g, in-situ biogas desulfurizer formula: 5g ferrous nitrate, 15g ferric nitrate, 25g ferric sulfate, 25g ferrous chloride, 5g ferric citrate, 25g ferrous carbonate. . When adding, mix the in-situ biogas desulfurizer and fermentation raw materials evenly.

[0027] Tests have shown that the in-situ biogas 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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PUM

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Abstract

The invention discloses an in-situ biogas 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 desulfurizer adopts the technical key points that: the desulfurizer is a ferric salt, and is one or more of ferric salts such as ferrous oxalate, ferrous chloride, ferrous sulphate, ferrous nitrate, ferrous carbonate, ferric chloride, ferric sulfate, ferric nitrate and ferric citrate; and a mass ratio of the desulfurizer to dried biogas fermentation raw materials is (1-30):1,000. The in-situ biogas desulfurizer is directly added into the biogas fermentation device to desulfurize the in-situ biogas, and has the advantages of abundant raw materials, obvious improvement on desulfurization efficiency, convenient operation, desulfurizing equipment cost conservation, low running cost and the like.

Description

Technical field: [0001] The patent of the invention relates to an in-situ biogas desulfurization agent directly added to a biogas fermentation device for desulfurization, which 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 biological desulf...

Claims

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Application Information

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IPC IPC(8): C10L3/00C07C9/04C07C7/148
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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