Marsh gas biological desulphurization energy-saving method

A biological desulfurization and biogas technology, applied in gas fuel, petroleum industry, fuel and other directions, can solve the problems of difficult control, difficult removal of hydrogen sulfide, harsh conditions, etc., to achieve easy control, suitable for survival and reproduction, and loose conditions. Effect

Inactive Publication Date: 2011-04-06
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the existing process of biological desulfurization is not easy to control, the conditions are harsh, and hydrogen

Method used

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  • Marsh gas biological desulphurization energy-saving method

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Example Embodiment

[0014] Specific implementation mode 1: Combination figure 1 As shown, the energy-saving method of biogas biological desulfurization in this embodiment is carried out in the following steps: 1. Adding Thiobacillus denitrificans and nitrifying bacteria to the nutrient solution, and then spraying on the filler, at a temperature of 27-28°C and a pH of Cultivate for 2 weeks under the conditions of 6.7 to 7.3 to form a biofilm; 2. Biogas and biofilm contact to react to complete biogas desulfurization; where the volume ratio of Thiobacillus denitrifying bacteria and nitrifying bacteria in step 1 is 2:1; One nutrient solution contains 5g of Na per 1L 2 S 2 O 3 ·5H 2 O, 1g of K 2 HPO 4 , 1g of KNO 3 , 1g of NaHCO 3 , 0.2g of MgSO 4 ·7H 2 O, 1g of NH 4 Cl, 4g of NaNO 2 , 0.5g of FeSO 4 ·7H 2 O and the remainder of distilled water; in the first step, the filler adopts two layers of polyurethane foam filler, which are a soft polyurethane foam filler layer and a rigid polyurethane foam fille...

Example Embodiment

[0022] Specific embodiment two: this embodiment is different from specific embodiment one in that in step one, add Thiobacillus denitrificans and nitrifying bacteria into the nutrient solution, and then spray them on the filler at a temperature of 27°C and a pH of 6.7 Cultivate for 2 weeks under the conditions to form a biofilm. Other steps and parameters are the same as in the first embodiment.

Example Embodiment

[0023] Specific embodiment three: this embodiment is different from specific embodiment one in that in step one, add Thiobacillus denitrificans and nitrifying bacteria to the nutrient solution, and then spray them on the filler at a temperature of 28°C and a pH of 7.3 Cultivate for 2 weeks under the conditions to form a biofilm. Other steps and parameters are the same as in the first embodiment.

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Abstract

The invention provides a marsh gas biological desulphurization energy-saving method, which relates to a marsh gas desulphurization method. The invention solves the problems that the biological desulphurization process in the prior art is not easy to control, the conditions and requirements are harsh, and sulfureted hydrogen can be easily and directly converted into sulfur oxides by germs, so the sulfur oxide can not be easily discharged from a system. The method comprises the following steps of: 1. adding thiobacillus denitrificans and nitrobacteria into nutrient fluid, then spraying the nutrient fluid onto filling materials and culturing the filling materials until biomembranes are formed; and 2. completing the process after the marsh gas is in contact and reacts with the biomembranes. The biological desulphurization energy-saving method in the invention is easy to control, has slack condition requirements and solves the problem that the sulfureted hydrogen can be easily and directly converted into the sulfur oxides by the germs to be released to the marsh gas again, the desulphurization efficiency can achieve higher than 95 percent when the sulfureted hydrogen content in the marsh gas is between 1000 and 4000mg/L, in addition, elemental sulfur can be recovered, the thiobacillus denitrificans and the nitrobacteria are symbiotic systems, the self-sufficiency effect is realized basically through the marsh gas, and the energy-saving effect is realized.

Description

technical field [0001] The invention relates to a biogas desulfurization method. Background technique [0002] With the widespread application of anaerobic biological treatment technology for industrial and agricultural waste, biogas, as a renewable biomass energy, has attracted more and more attention and attention in today's increasingly scarce fossil energy. Under normal conditions, the main components of biogas are methane (50% to 70%) and carbon dioxide (30% to 40%), and contain a small amount of carbon monoxide, hydrogen, hydrogen sulfide, oxygen and nitrogen. Hydrogen sulfide in biogas is generated from the degradation process of protein and other sulfur-containing compounds. Therefore, the concentration of hydrogen sulfide depends on the feed of the biogas generator. It varies between 0.1% and 2%. Excessive concentration of hydrogen sulfide is one of the biggest limiting factors for the use of biogas as fuel gas, because hydrogen sulfide has a strong corrosive effec...

Claims

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Application Information

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IPC IPC(8): C10L3/10
Inventor 韩洪军周飞祥欧阳力张怡
Owner HARBIN INST OF TECH
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