CN214300115U

CN214300115U - Improved anaerobic digester

Info

Publication number: CN214300115U
Application number: CN202023214901.0U
Authority: CN
Inventors: 罗娟; 赵立欣; 姚宗路; 于佳动
Original assignee: Institute of Environment and Sustainable Development in Agriculturem of CAAS
Current assignee: Institute of Environment and Sustainable Development in Agriculturem of CAAS
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-09-28
Anticipated expiration: 2030-12-28

Abstract

An improved anaerobic digester is characterized in that an annular groove is formed in the bottom of the anaerobic digester, one end of a slag discharge pipe extends into the annular groove, and a discharge pump is arranged at the other end of the slag discharge pipe and is communicated into peripheral equipment. The end of the slag discharge pipe in the ring groove is a bell mouth. The utility model discloses an anaerobic digestion reactor's institutional advancement can realize getting rid of the at least partly sediment in reactor bottom (solid matter that can not degrade) under the condition of uninterrupted anaerobic digestion process (not stopping the reactor operation promptly), increases the effective volume of reactor, prolongs the continuous operation time of engineering, and can not produce the essential interference to anaerobic digestion system's normal clear to improve the operating efficiency and the engineering benefit of engineering.

Description

Improved anaerobic digester

Technical Field

The utility model relates to the technical field of anaerobic digestion equipment, in particular to an improved anaerobic digester.

Background

China is a big agricultural country and a big population country, and generates a large amount of organic wastes such as straws, livestock and poultry manure, domestic garbage and the like every year, if the organic wastes are not properly treated in time, the problem of serious environmental pollution can be caused. The anaerobic digestion technology is an effective way for treating organic wastes, the method not only can realize the harmless and quantitative reduction treatment of the organic wastes, but also can produce renewable clean energy, namely methane, so that the energy utilization problem in rural areas can be solved according to local conditions, the energy structure is improved, the living environment in rural areas is improved, in addition, the fermentation residues are rich in nutrition, and the fermentation residues can also be used as fertilizers to be applied to farmlands.

The anaerobic digestion technology is a good organic waste resource utilization technology, and can treat various organic raw materials such as straws, livestock and poultry manure, household garbage and the like. During the collection process of the fermentation raw materials, due to the complex and various types and components of the raw materials and the great difference of the production conditions and environments, some solid pollutants (such as sand, stones and other solids which cannot be digested anaerobically) are often entrained in the mixed raw materials. In the operation process of the anaerobic digestion reactor, the solid pollutants are often precipitated to the bottom of the reactor gradually due to relatively high density, so that the effective volume of the reactor is reduced, sometimes even the normal operation of the anaerobic digestion reactor is disturbed, and the solid pollutants are required to be removed in time. Typically, these solid contaminants are periodically removed by emptying the reactor and cleaning the bottom of the reactor of the sediment. Because the anaerobic digestion reaction is a complex biochemical reaction process, the time from starting debugging to stable operation of the reactor is 5-10 days or even longer, and if the reactor is stopped to be cleaned, the operation efficiency of the engineering is directly influenced, and the engineering benefit is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a modified anaerobic digester can clear up the precipitate of reactor bottom automatically in order to empty the reactor, improves the operating efficiency and the engineering benefit of engineering.

The utility model discloses the technical scheme who adopts does:

an improved anaerobic digester is characterized in that an annular groove is formed in the bottom of the anaerobic digester, one end of a slag discharge pipe extends into the annular groove, and a discharge pump is arranged at the other end of the slag discharge pipe and is communicated into peripheral equipment.

The end of the slag discharge pipe in the ring groove is a bell mouth.

A double-layer soft film type gas storage cabinet is arranged above a top cover of the anaerobic digester, and a gas outlet pipe is arranged on the top cover of the double-layer soft film type gas storage cabinet.

And a plurality of side stirring devices are arranged in the circumferential direction below the top cover of the anaerobic digester.

The utility model discloses an anaerobic digestion reactor's institutional advancement can realize getting rid of the at least partly sediment in reactor bottom (solid matter that can not degrade) under the condition of uninterrupted anaerobic digestion process (not stopping the reactor operation promptly), increases the effective volume of reactor, prolongs the continuous operation time of engineering, and can not produce the essential interference to anaerobic digestion system's normal clear to improve the operating efficiency and the engineering benefit of engineering.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a sectional view a-a in fig. 1.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1 and 2, the improved anaerobic digester is characterized in that an annular groove 17 is formed in the bottom of the anaerobic digester 1, one end of a slag discharge pipe 15 extends into the annular groove 17, and the other end of the slag discharge pipe is provided with a discharge pump 13 and leads into peripheral equipment. The ring groove 17 collects the relatively dense solid pollutants (such as sand, stone and the like) settled to the bottom of the reactor in the fermentation process, so that the solid pollutants at the bottom of the reactor are further concentrated, and are continuously extracted outwards through the slag discharge pipe 15 and the discharge pump 13, so that at least one part of sediments (non-degradable solid matters) at the bottom of the reactor can be removed under the condition of not interrupting the anaerobic digestion process (namely not stopping the operation of the reactor), the effective volume of the reactor is increased, the continuous operation time of the engineering is prolonged, the essential interference on the normal operation of an anaerobic digestion system is avoided, and the operation benefit of the engineering is improved. The reactor discharge system of this example is still present.

The end of the slag discharge pipe 15 in the ring groove 17 is a bell mouth, which is convenient for extracting the settled material.

A double-layer soft film type gas storage cabinet 2 is arranged above a top cover of the anaerobic digester 1, and a gas outlet pipe 4 is arranged on the top cover of the double-layer soft film type gas storage cabinet 2. The top cover is used for storing methane, the flexible membrane is used as the flexible top cover of the reactor, the opening is relatively convenient, and the maintenance of the reactor is facilitated; the weight is light, and the construction cost is low; the air tightness is good, and the gas is not easy to diffuse; the pressure of the outlet methane is constant.

A plurality of side stirring devices 6 are arranged in the circumferential direction below the top cover of the anaerobic digester 1. The device is used for uniformly mixing materials in the reactor, and improves the material conversion efficiency and the reactor operation efficiency.

Claims

1. An improved anaerobic digester is characterized in that an annular groove (17) is formed in the bottom of the anaerobic digester (1), one end of a slag discharge pipe (15) extends into the annular groove (17), and the other end of the slag discharge pipe is provided with a discharge pump (13) and is communicated into peripheral equipment.

2. An improved anaerobic digester as claimed in claim 1 wherein the end of the slag discharge pipe (15) in the ring groove (17) is flared.

3. An improved anaerobic digester as claimed in claim 1, wherein the top of the anaerobic digester (1) is provided with a double-layer soft membrane gas holder (2), and the top of the double-layer soft membrane gas holder (2) is provided with an outlet pipe (4).

4. An improved anaerobic digester as claimed in claim 1 characterised in that there are side agitation means (6) located circumferentially below the top lid of the anaerobic digester (1).