Process and equipment for preparing biogas by continuous mode dry fermentation

A dry fermentation and biogas technology, applied in the fields of energy utilization and environmental protection, can solve the problems of multiple storage shifts, large floor space, and high requirements for the manufacture of airtight doors

Inactive Publication Date: 2012-05-16
QINGDAO TIANREN ENVIRONMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing dry-type fermentation technologies are tank-type, chamber-type or other methods. Most of these methods are batch-based. These methods are either difficult to feed and discharge materials, e...

Method used

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  • Process and equipment for preparing biogas by continuous mode dry fermentation
  • Process and equipment for preparing biogas by continuous mode dry fermentation

Examples

Experimental program
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Embodiment Construction

[0007] According to the types of fermentation raw materials, a corresponding number of storage bins are equipped, and various fermentation raw materials are loaded into the storage bin 1 by the loader, and the speed of the corresponding metering belt 2 is adjusted according to the mixing ratio of the raw materials, and various raw materials fall to the collection belt. 3. The raw materials are conveyed to the mixer 5 through the feeding screw 4, and the raw materials mixed uniformly by the mixer fall to the feeding screw 6, and then go to the hoist 7 to lift to the feeding machine 8 located on the upper part of the fermentation tank 9, and the feeding machine 8 will The raw materials are pressed into the fermentation tank 9 for anaerobic fermentation; the generated biogas is output from the biogas outlet pipe 11, and the leachate of the raw materials in the tank is pumped out by the spray pump 14, heated to a suitable temperature by the heat exchanger 13, and then sent to the sp...

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Abstract

The invention discloses a process and equipment for preparing biogas by continuous mode dry fermentation. The process comprises the following steps of: mixing various green materials (animal manure, straw, organic waste and the like) uniformly, delivering into a fermentation tank, feeding and discharging once per day, recovering 25-35% of discharged materials into a stirrer and mixing with green materials uniformly, and heating the percolate in the fermentation tank through a spray pump by a heat exchanger and then spraying into a reaction tank. The major equipment comprises a storage bin, a measuring belt, a gathering belt, a screw feeder, a stirrer, a feed screw, an elevator, a feeder, a fermentation tank, a gas reservoir, a biogas outlet tube, a spray tube, a heat exchanger, a spray pump, a discharge screw, a gathering screw, a discharging machine, a recovery screw, a flow-dividing screw, a control system and the like.

Description

technical field [0001] The invention belongs to the fields of energy utilization and environmental protection, and relates to a process and equipment for producing biogas by continuous dry fermentation. Background technique [0002] Biogas anaerobic fermentation can be divided into two categories: wet and dry. Wet anaerobic fermentation is mainly used to produce biogas from liquid waste such as livestock and poultry manure and sludge. The gas production rate is low, and if a large amount of biogas slurry is not treated properly, it will cause secondary pollution. In addition, it will consume a lot of energy in cold regions. The economic benefits are poor. The dry fermentation technology is used to process solid organic waste, and produce organic fertilizer while obtaining biogas. Most of the existing dry-type fermentation technologies are tank-type, chamber-type or other methods. Most of these methods are batch-based. These methods are either difficult to feed and discharg...

Claims

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Application Information

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IPC IPC(8): C12P5/02C12M1/36C12M1/107C12M1/02C02F11/04
CPCY02E50/343C12M41/00C12M21/16C12M27/02C12M33/20C12M41/18C12M21/04Y02E50/30
Inventor 陈伯强
Owner QINGDAO TIANREN ENVIRONMENT
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