Feeding device and method for materials with high solid content in biogas fermentation

Abstract

The invention discloses a biogas fermentation high-solid-content material feeding device which comprises a conveying spiral, a pressurization spiral and a discharging spiral which are coaxially connected in sequence from front to back. A cutting knife is arranged on a spiral shaft between the pressurization spiral and the discharging spiral in a sleeving mode. The front end of a spiral shaft of the conveying spiral extends out of a spiral barrel body to be connected with a speed reducer through a coupler. A feeding hopper is arranged on the front portion of the spiral barrel body of the conveying spiral. The portion, behind the feeding hopper, of the spiral barrel body of the conveying spiral is provided with a water filter hole and sleeved with an outer barrel. The outer barrel is provided with a residual liquid outlet. The tail end of the discharging spiral is provided with a discharging outlet. The problems that an existing pump for biogas fermentation high-solid-content materials is prone to blockage during conveying, a spiral lifting upper portion feeding structure is complex, and the cost is high are solved. The biogas fermentation high-solid-content material feeding device is small in occupied area, simple in structure, flexible to install and low in maintenance cost.

Description

technical field [0001] The invention relates to a material feeding device, in particular to a feeding device and a feeding method for materials with high solid content for biogas fermentation. Background technique [0002] At present, large and medium-sized biogas projects basically use submersible sewage pumps or screw pumps to feed materials through pipelines, and pump feeding is generally suitable for raw materials with TS (solid content) <5%. If the TS in the raw material is more than 10% or the fiber is more and longer, it is difficult to feed the material through the submersible sewage pump or the screw pump, mainly because the pump and pipeline are easy to block, and the maintenance is difficult, which often causes the biogas project to stop production, and it takes a lot of money to resume production. A lot of manpower and time. In foreign countries, when the TS of the fermentation raw material is more than 20%, the screw is usually used to feed the material from...

AI Technical Summary

Problems solved by technology

If the TS in the raw material is more than 10% or the fiber is more and longer, it is difficult to feed the material through the submersible sewage pump or the screw pump, mainly because the pump and pipeline are easy to block, and the maintenance is difficult, which often causes the biogas project to stop production, and it takes a lot of money to resume production. a lot of manpower and time

In foreign countries, when the TS of the fermentation raw material is more than 20%, the spiral lifting is usually used to feed the material from the upper part of the fermentation tank. This method has the problems of a large feeding system, a complex structure, and high construction and maintenance costs.

In view of the problems that the feed of the pump is easy to block when the TS content of the raw material for biogas fermentation is high, the feeding structure of the upper part of the screw lift is complicated, the area is large, and the cost is high. The development of a new feeding device is an urgent need to be solved in the biogas fermentation industry. question

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