Biogas slurry reduction treatment and biogas collaborative purification system and purification method

A purification system and reduction technology, applied in chemical instruments and methods, separation methods, water/sewage multi-stage treatment, etc., can solve the problems of large volume, low utilization rate and low fertilizer efficiency, and achieve low temperature requirements and reduced The equipment covers an area and the effect of enhancing fertilizer efficiency

Active Publication Date: 2017-05-31
HUAZHONG AGRI UNIV
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Problems solved by technology

Plant ash can be used as fertilizer directly, but because of its high alkalinity, low fertilizer efficiency, and bulky volume, its utilization rate is low, and it is piled up around the biomass power plant in large quantities, becoming the waste of the biomass power plant

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  • Biogas slurry reduction treatment and biogas collaborative purification system and purification method

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Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments:

[0036] like figure 1 The shown biogas slurry reduction treatment and biogas collaborative purification system and purification method include a biogas slurry mixing and stirring tank 1, a centrifugal pump 2, a security filter 3, a fine filtration biogas slurry storage tank 4, a fine filtration biogas slurry pump 5, Heater 6, hollow fiber membrane contactor 7, vacuum pump 9, washing and purification tower 10, condenser 11, ammonia water storage tank 13, ammonia water pump 14, ammonia water rich liquid storage tank 16, desulfurization and decarbonization tower 15, biogas liquid rich liquid storage tank The liquid tank 17 also includes a three-way valve 8, a first valve 12.1, and a second valve 12.2. The biogas slurry mixing and stirring tank 1 is provided with a biogas slurry inlet 1.1 and a plant ash inlet 1.2. The input of the centrif...

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Abstract

According to a biogas liquid reducing treatment and a biogas collaborative purification system and purification method disclosed by the present invention, by adding plant ash into the biogas liquid, alkalinity and pH value of the biogas liquid are increased, biogas liquid COD and suspended matter concentration of the biogas liquid are reduced, and by film decompression concentration technology, ammonia is recovered from the biogas liquid and biogas liquid concentration is performed, and therefore an objective of ammonia nitrogen content control in the biogas liquid and biogas liquid reducing treatment is achieved. In the biogas liquid film decompression process, ammonia enrichment can be further achieved, biogas can be desulfurized and decarburized at the same time by using enriched ammonia from the biogas liquid, and therefore preliminary purification of the biogas is achieved, then ammonia gas (NH3) entrained in the biogas is washed and CO2 in the biogas is further absorbed by using concentrated biogas liquid with high pH value, and therefore the biogas is purified and nitrogen content in the biogas liquid is controlled. The present invention can realize the biogas liquid reducing treatment, increase the nutrient content in the biogas liquid, and ensure that the ammonia nitrogen content is in a reasonable utilization range; and meanwhile the present invention is relied on low grade energy, and can therefore reduce costs.

Description

technical field [0001] The invention relates to the technical field of biogas liquid treatment and biogas purification in biogas engineering, in particular to a biogas liquid reduction treatment and biogas synergistic purification system and purification method. [0002] technical background [0003] Biogas, biogas residue and biogas slurry can be obtained by anaerobic fermentation of organic wastes such as livestock and poultry manure, crop straw, kitchen waste, etc. Among them, biogas, as a clean renewable energy, can realize carbon dioxide (CO2) in the energy utilization process. 2 ) near zero emissions, while biogas residue and biogas slurry are high-quality organic fertilizers, which can reduce the application of chemical fertilizers and pesticides and increase efficiency in agricultural production applications. However, at this stage, China's major large and medium-sized biogas projects all use mature wet anaerobic fermentation technology, which produces a large amount ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10B01D53/78B01D53/52B01D53/62B01D53/58C10L3/10
CPCY02A50/20
Inventor 晏水平贺清尧王文超张衍林艾平王媛媛袁巧霞
Owner HUAZHONG AGRI UNIV
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