Straw anaerobic fermentation system and method

An anaerobic fermentation and straw technology, applied in fermentation, biochemical equipment and methods, bioreactor/fermenter combination, etc., can solve the problems of acidification, unrealistic large-scale biogas projects, etc., to increase contact and improve raw material processing. amount of effect

Inactive Publication Date: 2020-09-15
北京长信绿源节能科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the existing patent application No. 201510680539.0 discloses a straw fermentation process. This system combines storage and hydrolysis, but long-term storage of straw in the hydrolysis tank will easily lead to problems such as acidification, and it is not suitable for large-scale biogas projects. actual

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  • Straw anaerobic fermentation system and method

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Embodiment 1

[0042] Embodiment 1 of the present invention is a straw anaerobic fermentation system, comprising a straw feeding mechanism 1, a mixed feeding mechanism, a fermentation tank 3, a circulation mechanism, a gas storage membrane 304 and a reflux mechanism;

[0043]The straw feeding mechanism is used to transfer the crushed straw to the mixing feeding mechanism, and the downstream of the straw feeding mechanism is connected to the mixing feeding mechanism;

[0044] The mixing and feeding mechanism includes a mixing tank 2 and a lifting pump 201. The mixing tank 2 is used to mix the straw with the recirculated biogas slurry; the downstream of the mixing tank 2 is connected to the fermentation tank 3 through the lifting pump 201;

[0045] The fermenter 3 is connected with a circulation mechanism so that the material at the bottom of the fermenter 3 circulates and enters the fermenter 3 from the top of the fermenter 3. The fermenter 3 communicates with the gas storage membrane 304, the...

Embodiment 2

[0056] A straw anaerobic fermentation process adopts a straw anaerobic fermentation system disclosed in Example 1, specifically comprising the following steps:

[0057] (1) Pretreatment: The straw is first crushed in a pulverizer to a length of 2cm to 10cm. After crushing, it is placed in a ventilated and dry place for drying treatment, and then transported to the mixing tank through the straw feeding mechanism at a uniform speed, and processed with the biogas slurry produced after fermentation. Mixing ingredients, controlling the feeding speed of the straw feeding mechanism and the discharging speed of the mixing tank so that the dry matter content of the obtained mixed material is 8-10%;

[0058] (2) Feeding: The mixed material in the mixing tank is fed to the feeding port on the top of the fermentation tank through the lifting pump, and the feeding port is switched according to the feeding situation to achieve the purpose of uniform distribution;

[0059] (3) Anaerobic ferm...

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Abstract

The invention discloses a straw anaerobic fermentation system which comprises a mixing mechanism, a feeding mechanism, a fermentation tank, a circulating mechanism, a gas storage film and a backflow mechanism. The invention also discloses a straw anaerobic fermentation process, so that raw material treatment capacity can be improved, material circulation in the fermentation tank is realized, and the problems of difficult straw feeding and difficult straw discharging are solved. In addition, all biogas slurry is recycled, so that straw can be fully fermented, biogas can be continuously and stably produced, and the method is suitable for large-scale straw fermentation biogas production engineering.

Description

technical field [0001] The invention relates to the technical field of crop anaerobic fermentation technology, and more specifically relates to a straw anaerobic fermentation system and method. Background technique [0002] At present, my country produces a huge amount of crop straw, and the open burning of a large amount of straw leads to serious air pollution and fires, and affects the safe operation of aviation and highways. It is a major environmental problem faced by all parts of the country. The development and utilization of straw has become a It is one of the major environmental problems that urgently need to be solved in our country. In addition to being used for industrial raw materials such as fertilizer, feed, base material and papermaking, more than half of crop straw can also be used as energy. Through anaerobic digestion technology, agricultural waste such as livestock and poultry manure and straw can be converted into renewable and clean energy—biogas. [00...

Claims

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Application Information

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IPC IPC(8): C12M1/107C12M1/00C12P5/02
CPCC12M21/04C12M23/36C12M29/18C12M45/02C12M45/04C12M47/10C12P5/023Y02E50/30
Inventor 从明耀浦鹏李洪燕
Owner 北京长信绿源节能科技有限公司
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