CN201080460Y - Vertical operation dry-type anaerobic digestion device - Google Patents

Abstract

Disclosed is a dry anaerobic digestion device which is vertically moved. The anaerobic digestion device comprises a tank body of a vertical anaerobic digestion tank; the top of the anaerobic digestion tank is provided with a biogas outlet, a relief valve connection and an inspection manhole and the bottom is a taper bucket. The anaerobic digestion device is characterized in that the lower opening of the taper bucket is communicated with the inlet of a control valve, while the outlet of the control valve is communicated with the upper opening of a feeding recycle pump through a pipeline; the upper opening of the feeding recycle pump is communicated with the lower opening of a feed hopper through a valve; the lower opening of the feeding recycle pump is communicated with the inlets of 2-10 vertical feeding pipes in the anaerobic digestion tank through the pipeline and the valve; the outlet of each feeding pipe is arranged close to the top of the tank body of the anaerobic digestion tank; the bottom of the tank body of the anaerobic digestion tank is provided with a steadier. When the utility model is used to treat materials, the solid content ratio can reach 15 to 40 percent. The utility model has the advantages of simple structure, free maintenance, and simple and convenient operation management; has no internal stirrer and moving parts; the volume biogas production can reach 5 to 20 square meters per cubic meter; and the utility model produces no liquid waste, no solid disposition and is sealed without releasing waste gas.

Description

A dry anaerobic digestion unit running vertically

technical field

The utility model relates to a device for anaerobic digestion of organic waste, in particular to a device for vertically running dry anaerobic digestion of organic waste.

Background technique

Organic waste includes agricultural product processing waste, livestock and poultry manure, municipal solid waste, urban sludge, etc. These wastes contain a large amount of organic components and are good raw materials for anaerobic fermentation, which can be converted into biogas for use as renewable energy, and the produced biogas residue It is a good organic fertilizer. Most of the anaerobic digestion devices currently used are wet fermentation with a solid content of 4-10%, which is characterized by high water consumption when treating organic waste, usually requiring a larger reactor, occupying a large area, and requiring more consumption In addition, a large amount of biogas slurry produced after fermentation needs to be treated. The wet fermentation device has large investment, large land occupation, high energy consumption, and low gas production rate per unit volume.

Contents of the invention

The purpose of this utility model is to provide a vertically running dry anaerobic digestion device, which can directly process organic waste, has the characteristics of simple operation and low investment, and can solve the above-mentioned shortcomings of the prior art.

A vertically running dry anaerobic digestion device with a vertical anaerobic digestion tank body, the top of which has a biogas outlet, a safety valve interface and a maintenance manhole, and a conical bucket at the bottom, which is characterized by a conical The lower port of the bucket is connected with the inlet of the control valve, the outlet of the control valve is connected with the upper port of the feeding circulation pump through the pipeline, and the upper port of the feeding circulating pump is also connected with the lower port of the feeding hopper through the valve, and the feeding circulating pump The lower opening of the anaerobic digestion tank communicates with the inlets of 2-10 vertically erected feed pipes in the anaerobic digestion tank through pipes and valves. The outlets of each feed pipe are close to the top of the anaerobic digestion tank. There are brackets at the bottom of the body.

When the utility model handles materials, the solid content rate can reach 15-40%; the structure is simple, without internal stirring machinery and moving parts, maintenance-free, easy to operate and manage; the gas production rate of the volume of the anaerobic digestion tank can reach 5-20m ³ / m ³ ; No waste water, no solid deposits, no waste gas release in airtight.

Description of drawings

Accompanying drawing is the structural representation of the utility model.

Detailed ways

The utility model has a vertical anaerobic digestion tank body 1, and its top has a biogas outlet (not shown in the figure), a safety valve interface (not shown in the figure) and a maintenance manhole (not shown in the figure). ), the bottom is a conical bucket 4, which is characterized in that the lower mouth of the conical bucket 4 communicates with the inlet of the control valve 5, and the outlet of the control valve 5 communicates with the upper mouth of the feed circulation pump 2 through a pipeline 8, and the feed circulation pump The upper port of 2 is also communicated with the lower port of the feed hopper 6 through the valve 7, and the lower port of the feed circulation pump 2 is connected with 2-10 feed pipes 3 vertically erected in the anaerobic digestion tank body 1 through pipelines and valves. The inlet of the feed pipe 3 is close to the top of the anaerobic digestion tank body 1, and the bottom of the anaerobic digestion tank body 1 has a bracket 9.

When using this vertically running dry anaerobic digestion device, organic waste (15-40% by weight of dry matter) enters the feed circulation pump 2 through the feed hopper 6, and the material is sent to the feed circulation pump 2 through pipelines and valves. into the feed pipe 3, run vertically upwards until the outlet of the feed pipe 3 is pushed out, and fall vertically into the anaerobic digestion tank body 1, and the material falling on the bottom of the anaerobic digestion tank body 1 is in the conical bucket 4 Under the guidance of the control valve 5 and pipeline 8, it is sent into the feed circulation pump 2. By adopting sequential batch feeding, the biological material and the recycled clinker can be mixed in a certain ratio. Open the valve 7 when feeding materials into the feed hopper 6, and close the valve 7 when not feeding materials. There is no mechanical stirring device in the tank body 1 of the anaerobic digestion tank, and the material circulates continuously and moves in layers through the feed circulation pump 2 in the tank body 1 of the anaerobic digestion tank from top to bottom. The tank body 1 of the anaerobic digestion tank can be a cylindrical steel tank, an assembled tank or a steel-mixed tank body. The feed circulation pump 2 can be a reciprocating pump, a rotor pump or a screw pump for conveying high-concentration materials.

Claims (2)

1. the dry anaerobic digestion device of a vertical operation has vertical type anaerobic digester tank body (1), and its top has biogas to efflux mouth; Relief valve connection and inspection manhole, the bottom is taper bucket (4), the end opening that it is characterized in that taper bucket (4) is communicated with the inlet of by-pass valve control (5), the outlet of by-pass valve control (5) is by suitable for reading being communicated with of pipeline (8) with feed cycle pump (2), the suitable for reading of feed cycle pump (2) also is communicated with the end opening of hopper (6) by valve (7), the end opening of feed cycle pump (2) passes through pipeline, the inlet of the 2-10 root feed pipe (3) that stands vertically in valve and the anaerobic digestion tank (1) is communicated with, all near the top of anaerobic digestion tank (1), support (9) is arranged at the bottom of anaerobic digestion tank (1) in the outlet of each feed pipe (3).

2. the dry anaerobic digestion device of vertical operation as claimed in claim 1 is characterized in that described feed cycle pump (2) is reciprocation pump, rotor pump or spiral pump.

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