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Waste heat comprehensive utilization system of biogas project

An engineering and biogas technology, applied in the fields of gas production bioreactor, bioreactor/fermenter combination, bioreactor/fermenter for specific purposes, etc., which can solve the problem that low-grade heat cannot be used, biogas is difficult to guarantee, and the cost is high. problems, to achieve the effect of maintaining a virtuous circle, changing unprofitability and huge economic benefits

Active Publication Date: 2016-01-13
QINGDAO ZHONGKE HUATONG ENERGY ENG
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Problems solved by technology

[0005] The present invention aims at the problems of high energy consumption and high cost in the operation of the current biogas project, the large amount of low-grade heat generated cannot be utilized, the produced biogas is difficult to ensure the operation of the system, and the benefit is poor. A comprehensive utilization of waste heat in biogas projects is designed. system

Method used

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  • Waste heat comprehensive utilization system of biogas project

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Embodiment Construction

[0016] The waste heat comprehensive utilization system of the biogas project of the present invention, the biogas project includes a fermentation tank, a biogas residue biogas slurry pool, a water drying tower and an absorption tower. The waste heat comprehensive utilization system includes a hot water tank, a heat primary raising system and a heat secondary raising system.

[0017] The primary heat raising system includes a heat exchanger. The biogas residue biogas slurry pool is connected to the water inlet on the heat release side of the heat exchanger through pipelines and a biogas slurry circulation pump, and the water outlet on the heat release side of the heat exchanger is connected to the biogas slurry Slag biogas tank connection; the middle and lower part of the hot water tank is connected to the water inlet provided on the heat-absorbing side of the heat exchanger through the pipeline and the heat exchange pump, and the water outlet provided on the heat-absorbing side...

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Abstract

The invention relates to a novel comprehensive waste heat utilization system of biogas engineering. The biogas engineering comprises a fermentation tank and a biogas residue and liquid tank, and a step waste heat recycling system comprises a hot water tank, a primary heat lifting system and a secondary heat lifting system. According to the novel comprehensive waste heat utilization system of biogas engineering, the heat in the biogas resides and biogas liquids is collected into the hot water tank through the primary heat lifting system, heat in the hot water tank is further heated by using a small amount of electric energy through the second heat lifting system and is subsequently fed into a thermal storage tank, the heat in the thermal storage tank is further heated through a straight combustion type heat pump and is conducted to the fermentation tank, then the temperature necessary for biogas fermentation is maintained, the heat carried in the discharged biogas residue and the biogas liquid is effectively utilized, the energy consumption for maintaining the fermentation temperature is reduced, the normal operation of the biogas engineering is effectively maintained, the positive cycle of the system is maintained, the operation cost of the biogas engineering is reduced, the energy consumption is reduced by 50-90%, the situation that the biogas engineering can make no profit is changed, and great economic benefits are generated.

Description

technical field [0001] The invention relates to an energy recovery and utilization system, in particular to a comprehensive utilization system of waste heat in a biogas project. Background technique [0002] At present, fossil fuels such as oil, natural gas, and coal are increasingly scarce all over the world. Due to the non-renewability of fossil fuels, countries are actively looking for and researching alternative energy sources. Compared with fossil energy, biomass energy has very obvious advantages, and it is a form of renewable energy that integrates environmental protection and economic benefits. At the same time, the rapid development of China's economy has also brought serious environmental problems. Improving the ecological environment and realizing sustainable economic development are the policy priorities for China's future development. Water pollution and land pollution caused by biomass waste discharge have seriously restricted the sustainable development of my...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12M1/107C12M1/02
CPCC12M21/04C12M41/18C12M47/20Y02E50/30
Inventor 王传水夏晓芳张亮王倩任路路赵志斌武婧
Owner QINGDAO ZHONGKE HUATONG ENERGY ENG
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