CN212610183U

CN212610183U - Three-stage fermentation system for producing biogas

Info

Publication number: CN212610183U
Application number: CN202021016118.0U
Authority: CN
Inventors: 周嘉豪
Original assignee: Dihui Environmental Protection Equipment Hubei Co Ltd
Current assignee: Dihui Environmental Protection Equipment Hubei Co Ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-02-26
Anticipated expiration: 2030-06-05

Abstract

The utility model relates to a tertiary fermentation system for producing marsh gas, including CSTR fermentation cylinder, filter equipment, black membrane methane-generating pit and IC anaerobic reactor, the natural pond liquid outlet of CSTR fermentation cylinder connects filter equipment, filter equipment is used for separating out the natural pond sediment in the natural pond liquid, the natural pond liquid outlet of filter equipment connects the black membrane methane-generating pit, the natural pond liquid outlet of black membrane methane-generating pit connects IC anaerobic reactor, the natural pond gas outlet of CSTR fermentation cylinder, black membrane methane-generating pit and IC anaerobic reactor all connects desulfurization dewatering equipment, the natural pond gas outlet of desulfurization dewatering equipment connects the gas holder, the gas holder is used for storing marsh gas; the utility model improves the utilization rate of biogas slurry, improves the biogas yield and improves the economic benefit.

Description

Three-stage fermentation system for producing biogas

Technical Field

The utility model relates to the technical field of biogas power generation, in particular to a three-stage fermentation system for producing biogas.

Background

A large amount of excrement and urine can be produced in production activities of livestock and poultry, and is treated as waste or fertilizer by ordinary farmers, so that the livestock and poultry breeding industry is not environment-friendly, and the advanced treatment mode is that the excrement and urine is diluted and then is subjected to anaerobic fermentation process to generate methane, and the methane is used for generating electricity, so that the livestock and poultry breeding industry is environment-friendly and can generate electricity; the prior fermentation device has low utilization rate of biogas slurry and low biogas production rate.

Disclosure of Invention

The utility model aims at providing a tertiary fermentation system for producing marsh gas in order to solve the problem that the current fermenting installation is not high to the natural pond liquid utilization ratio, and the gas production of marsh gas is not high.

The utility model has the following concrete scheme: a three-stage fermentation system for producing biogas comprises a CSTR fermentation tank, a filtering device, a black film biogas digester and an IC anaerobic reactor, wherein a biogas slurry outlet of the CSTR fermentation tank is connected with the filtering device, the filtering device is used for separating biogas residues in the biogas slurry, a biogas slurry outlet of the filtering device is connected with the black film biogas digester, a biogas slurry outlet of the black film biogas digester is connected with the IC anaerobic reactor, biogas outlets of the CSTR fermentation tank, the black film biogas digester and the IC anaerobic reactor are all connected with desulfurization and dehydration equipment, a biogas outlet of the desulfurization and dehydration equipment is connected with a gas holder, and the gas holder is used for storing biogas.

Filter equipment includes the box, and the box top is equipped with the sieve of slope, and the box is located the sieve upper end and is equipped with the inlet pipe, and the box is located the sieve lower extreme and is equipped with and connects the sediment groove, connects the sediment inslot to be equipped with screw conveyer, and screw conveyer's output is equipped with the export of natural pond sediment, is located the sieve below in the box and is equipped with the export of natural pond liquid, screw conveyer's output stretches out to connect sediment groove outer end and overcoat to have a sleeve pipe, and the equipartition has a plurality of sieve meshes on the sheathed tube pipe wall, and the box outside is equipped with the water receiving tank, the sleeve pipe is located the water receiving tank, and water receiving tank bottom is equipped with the wet return, the inside intercommunication of wet return bottom and box, and water receiving tank front.

The box is located the sieve both sides and is equipped with the support, and the support top is equipped with the crossbeam, is equipped with vibrating motor on the crossbeam.

Lie in inlet pipe department on the box and be equipped with the header tank, inlet pipe inner and header tank intercommunication, the header tank upper end is equipped with the bulk cargo mouth, bulk cargo mouth length with the sieve width is the same.

IC anaerobic reactor includes the cylindric shell, and vapour and liquid separator is equipped with at cylindric shell top, and upper three-phase separator is equipped with to the upper end in the cylindric shell, and lower floor's three-phase separator is equipped with at the middle part, upper three-phase separator all through the connecting pipe with the gas outlet of lower floor's three-phase separator vapour and liquid separator intercommunication, vapour and liquid separator bottom are equipped with the wet return, and the wet return bottom is stretched to bottom in the cylindric shell, and cylindric shell lower extreme is equipped with the natural pond liquid import, and vapour and liquid separator top is equipped.

The working principle of the utility model is as follows: adding water to livestock and poultry manure, diluting, pretreating, conveying the livestock and poultry manure into a CSTR fermentation tank for primary fermentation, overflowing biogas slurry into an intermediate tank for storage after fermenting for a certain time, filtering biogas slurry in the intermediate tank by a filtering device, conveying the biogas slurry into a black film biogas pool for secondary fermentation, pumping the biogas slurry into an IC anaerobic reactor for tertiary fermentation by a liquid pump after fermenting for a certain time, and desulfurizing and drying biogas generated by primary, secondary and tertiary fermentation and then conveying the biogas into a gas cabinet for storage.

The utility model discloses following beneficial effect has: 1. the biogas slurry is fermented for three times, so that the biogas yield is improved, and the biogas slurry utilization rate is improved; 2. the biogas slurry and the biogas residues are respectively treated by filtering, and the biogas residues can be made into fertilizers for sale, so that the economic benefit is improved.

Drawings

FIG. 1 is a schematic diagram of the system of the present invention;

fig. 2 is a perspective view of the filtering device of the present invention;

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a view A-A of FIG. 3;

FIG. 5 is a view B-B of FIG. 3;

FIG. 6 is a schematic structural diagram of the IC anaerobic reactor of the present invention;

in the figure: 1-filtering device, 101-box body, 102-water collecting tank, 103-feeding pipe, 104-sieve plate, 105-vibrating motor, 106-bracket, 107-slag receiving tank, 108-screw conveyor, 109-water receiving tank, 110-sleeve, 111-baffle, 112-supporting rod, 113-water return pipe, 114-biogas slurry outlet, 2-IC anaerobic reactor, 201-biogas slurry inlet, 202-water return pipe, 203-lower layer three-phase separator, 204-upper layer three-phase separator, 205-gas-liquid separator, 206-biogas pipe and 207-connecting pipe.

Detailed Description

Referring to fig. 1, the embodiment includes a CSTR fermentation tank, a filtering device 1, a black film methane tank and an IC anaerobic reactor 2, wherein a methane liquid outlet of the CSTR fermentation tank is connected with the filtering device 1, the filtering device 1 is used for separating methane slag from the methane liquid, a methane liquid outlet of the filtering device 1 is connected with the black film methane tank, a methane liquid outlet of the black film methane tank is connected with the IC anaerobic reactor 2, methane outlets of the CSTR fermentation tank, the black film methane tank and the IC anaerobic reactor 2 are all connected with a desulfurization and dehydration device, a methane outlet of the desulfurization and dehydration device is connected with a gas holder, and the gas holder is used for storing methane.

Referring to fig. 2-5, an input end of the filtering device of this embodiment is connected to a biogas slurry discharge port of a fermentation tank, the filtering device 1 is provided with a biogas slurry outlet 114 and a biogas residue outlet, the biogas slurry outlet 114 is connected to a biogas slurry tank, the filtering device 1 includes a box body 101, an inclined sieve plate 104 is arranged at a top end of the box body 101, a feed pipe 103 is arranged at an upper end of the sieve plate 104 of the box body 101, a residue receiving groove 107 is arranged at a lower end of the sieve plate 104 of the box body 101, a spiral conveyor 108 is installed in the residue receiving groove 107, an output end of the spiral conveyor 108 is provided with the biogas residue outlet, and the biogas; this embodiment the output of screw conveyer 108 stretches out and connects slag receiving groove 109 outer end and overcoat to have a sleeve pipe 110, and the equipartition has a plurality of sieve meshes on sleeve pipe 110's the pipe wall, and the box 101 outside is equipped with water receiving tank 109, sleeve pipe 110 is located water receiving tank 109, and water receiving tank 109 bottom is equipped with wet return 113, and wet return 113 bottom and the inside intercommunication of box 101, water receiving tank 109 front end are equipped with bracing piece 112, and a baffle 111 is equipped with to bracing piece 112 outer end, and screw conveyer 108's main shaft tip passes through the bearing and is connected with baffle 111.

In this embodiment, the box 101 is provided with brackets 106 at two sides of the screen deck 104, and a beam is provided at the top of the brackets 106 and provided with a vibration motor 105.

In this embodiment, a water collecting tank 102 is arranged at a position of the feeding pipe 103 on the box body 101, the inner end of the feeding pipe 103 is communicated with the water collecting tank 102, a material scattering opening is arranged at the upper end of the water collecting tank 102, and the length of the material scattering opening is the same as the width of the sieve plate 104.

In this embodiment, the IC anaerobic reactor 2 includes a cylindrical housing, a gas-liquid separator 205 is installed at the top of the cylindrical housing, an upper three-phase separator 204 is installed at the upper end in the cylindrical housing, a lower three-phase separator 203 is installed at the middle part, the gas outlets of the upper three-phase separator 204 and the lower three-phase separator 203 are communicated with the gas-liquid separator 205 through a connecting pipe 207, a water return pipe 202 is installed at the bottom of the gas-liquid separator 205, the bottom of the water return pipe 202 extends to the bottom end in the cylindrical housing, a biogas slurry inlet 201 is installed at the lower end of the cylindrical housing, and a.

Claims

1. A tertiary fermentation system for producing marsh gas, characterized by: the system comprises a CSTR fermentation tank, a filtering device, a black film methane tank and an IC anaerobic reactor, wherein a methane liquid outlet of the CSTR fermentation tank is connected with the filtering device, the filtering device is used for separating methane residues in methane liquid, a methane liquid outlet of the filtering device is connected with the black film methane tank, a methane liquid outlet of the black film methane tank is connected with the IC anaerobic reactor, methane outlets of the CSTR fermentation tank, the black film methane tank and the IC anaerobic reactor are all connected with desulfurization and dehydration equipment, a methane outlet of the desulfurization and dehydration equipment is connected with a gas holder, and the gas holder is used for storing methane.

2. The three-stage fermentation system for producing biogas according to claim 1, wherein: the filter equipment includes the box, and the box top is equipped with the sieve of slope, and the box is located the sieve upper end and is equipped with the inlet pipe, and the box is located the sieve lower extreme and is equipped with and connects the sediment groove, connects the sediment inslot to be equipped with screw conveyer, and screw conveyer's output is equipped with the marsh slag export, is located the sieve below in the box and is equipped with the natural pond liquid export, screw conveyer's output stretches out and connects sediment groove outer end and overcoat and have a sleeve pipe, and the equipartition has a plurality of sieve meshes on the sheathed tube pipe wall, and the box outside is equipped with the water receiving tank, the sleeve pipe is located the water receiving tank, and water receiving tank bottom is equipped with the wet return, and wet return bottom and the inside intercommunication of box, water receiving tank.

3. The three-stage fermentation system for producing biogas according to claim 1, wherein: IC anaerobic reactor includes the cylindric shell, and vapour and liquid separator is equipped with at cylindric shell top, and upper three-phase separator is equipped with to the upper end in the cylindric shell, and lower floor's three-phase separator is equipped with in the middle part, upper three-phase separator all through the connecting pipe with the gas and liquid separator intercommunication, vapour and liquid separator bottom is equipped with the wet return, and the wet return bottom is stretched to bottom in the cylindric shell, and cylindric shell lower extreme is equipped with the natural pond liquid import, and the gas and liquid separator top is equipped with the natural pond pipe.