CN112410190A - Three-box methane tank and fermentation method - Google Patents
Three-box methane tank and fermentation method Download PDFInfo
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- CN112410190A CN112410190A CN202011476809.3A CN202011476809A CN112410190A CN 112410190 A CN112410190 A CN 112410190A CN 202011476809 A CN202011476809 A CN 202011476809A CN 112410190 A CN112410190 A CN 112410190A
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 196
- 238000000855 fermentation Methods 0.000 title claims description 14
- 230000004151 fermentation Effects 0.000 title claims description 14
- 238000000034 method Methods 0.000 title claims description 12
- 239000000203 mixture Substances 0.000 claims description 37
- 238000005086 pumping Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 241000894006 Bacteria Species 0.000 description 13
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 102000004169 proteins and genes Human genes 0.000 description 3
- 108090000623 proteins and genes Proteins 0.000 description 3
- 239000010902 straw Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000001461 cytolytic effect Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/58—Reaction vessels connected in series or in parallel
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P5/00—Preparation of hydrocarbons or halogenated hydrocarbons
- C12P5/02—Preparation of hydrocarbons or halogenated hydrocarbons acyclic
- C12P5/023—Methane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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Abstract
A three-tank methane tank comprises a first methane tank, a second methane tank and a third methane tank, wherein the first, second and third methane tanks are all round and arranged in concentric circles, and are respectively the first, second and third methane tanks from outside to inside; the bottoms of the first methane tank, the second methane tank and the third methane tank are mutually isolated, the tops of the first methane tank, the second methane tank and the third methane tank are communicated, and the top of the first methane tank is provided with a dome; the heights of the first biogas tank, the second biogas tank and the third biogas tank are reduced in sequence. A first feeding pipe is arranged in the first methane tank, the first feeding pipe passes through the dome and then is provided with a first feeding valve, and a mixing tank is arranged on the first feeding valve.
Description
Technical Field
The invention relates to a methane tank and a methane fermentation method.
Background
The methane is a combustible gas produced by organic substances through microbial fermentation under the conditions of certain temperature, humidity and pH value in an anaerobic environment. This gas is called biogas because it is originally found in swamps, lakes, ponds. The biogas contains a plurality of gas components, [1]the major component is methane (CH 4). The process of decomposing organic matters by methane bacteria to produce methane is called methane fermentation. Biogas bacteria can be divided into two categories according to the action of various bacteria in the biogas fermentation process. The first group of bacteria is called decomposing bacteria, which function to decompose complex organic substances into simple organic substances and carbon dioxide (CO 2) and the like. Among them, those specially used for decomposing cellulose are called cellulolytic bacteria; the protein decomposing bacteria are called as protein decomposing bacteria which specially decompose protein; the special fat decomposing bacteria are called fat decomposing bacteria; the second group of bacteria is called methanogens, usually methanogens, whose actionSimple organic matter and carbon dioxide are oxidized or reduced to methane. Therefore, the process of converting organic matters into methane is similar to two processes of producing a product in a factory: firstly, decomposing bacteria to process complex organic matters such as excrement, straws, weeds and the like into semi-finished products, namely compounds with simple structures; then under the action of methane bacteria, the simple compound is processed into a product, namely methane is generated.
At present, the conventional methane tank cannot well strengthen the strains in the tank due to crusting, direct current running and the like, so that the gas output is less, which is represented by less dissolved gas output in the tank and less gas output per ton of straw, and thus the conventional methane tank cannot be well utilized and popularized.
Disclosure of Invention
In order to solve the technical problems, the invention provides a methane tank with high gas production rate and a fermentation method.
A three-tank methane tank comprises a first methane tank, a second methane tank and a third methane tank, wherein the first, second and third methane tanks are all round and arranged in concentric circles, and are respectively the first, second and third methane tanks from outside to inside; the bottoms of the first methane tank, the second methane tank and the third methane tank are mutually isolated, the tops of the first methane tank, the second methane tank and the third methane tank are communicated, and the top of the first methane tank is provided with a dome; the heights of the first biogas tank, the second biogas tank and the third biogas tank are reduced in sequence.
A first feeding pipe is arranged in the first methane tank, the first feeding pipe passes through the dome and then is provided with a first feeding valve, and a mixing tank is arranged on the first feeding valve.
A second discharge pipe is arranged in the second methane tank, and the lower part of the second discharge pipe is close to the bottom of the second methane tank; a second discharge valve is arranged on the second discharge pipe after the second discharge pipe passes through the dome; the second discharge valve is arranged on the intermediate tank, a second air pump valve is arranged on the intermediate tank, and the rear of the second air pump valve is connected with an air pump through a pipeline.
The bottom of the intermediate tank is provided with a connecting pipe, the highest position of the connecting pipe is not lower than the height of the intermediate tank, and the mixing tank is arranged below the outlet of the connecting pipe.
And a third discharge pipe is arranged in the third methane tank, and a third discharge valve is arranged behind the third discharge pipe through the dome.
Preferably, the first, second and third biogas tanks are constructed by concrete, and the volume ratio of the first, second and third biogas tanks is 1: 1: 1.
a biogas fermentation method of a three-box biogas digester, which comprises the following steps,
firstly, putting a biogas mixture into the first biogas tank through the first feeding pipe, and then closing the first feeding valve, the second discharging valve and the third discharging valve;
after the biogas mixture is primarily fermented, repeating the first step until the fermented mixture in the first biogas tank overflows into the second biogas tank through the tank wall of the second biogas tank;
thirdly, after the mixture in the second methane tank is fermented for a period of time, opening the second discharge valve and the second air pump valve, opening the air pump to enable the air pump to be in an air pumping mode, and pumping the mixture at the bottom of the second methane tank into the intermediate tank;
fourthly, when the mixture in the intermediate tank reaches a specified material level, closing the second discharge valve;
fifthly, enabling the air pump to be in an air pumping mode, pressurizing the intermediate tank, and pressing the mixture in the intermediate tank into the mixing tank;
sixthly, adding a fresh mixture into the mixing tank, and feeding the fresh mixture and the fermented mixture into the first methane tank again;
seventhly, repeating the second step to the sixth step to fully ferment the mixture in the second methane tank; simultaneously, the mixture in the first biogas tank can be fully fermented;
and eighthly, after full fermentation, the mixed material slag in the second methane tank enters the third methane tank.
The period of time for the third step may be 1-3 days.
The invention effectively solves the problem of less gas outlet of the prior methane tank, can lead the gas outlet per ton of straws to be more than 550 cubic meters, and has the capacity gas production rate of 1: 10.
drawings
Fig. 1 is a cross-sectional view of the present invention.
Fig. 2 is a top view of the present invention.
In the figure: 1-a first biogas tank, 2-a second biogas tank, 3-a third biogas tank, 4-a dome, 5-a third discharge valve, 6-a third discharge pipe, 7-a second discharge valve, 8-an intermediate tank, 9-a second air pump valve, 10-a connecting pipe, 11-an air pump pipeline, 12-an air pump, 13-a mixing tank, 14-a first feed valve and 15-a first feed pipeline.
Detailed Description
In order to more clearly illustrate the present invention, embodiments of the present invention are further described below with reference to the accompanying drawings.
As shown in fig. 1-2, a three-tank biogas digester comprises a first biogas tank, a second biogas tank and a third biogas tank, wherein the first, second and third biogas tanks are circular and arranged in concentric circles, and are respectively a first biogas tank, a second biogas tank and a third biogas tank from outside to inside; the bottoms of the first methane tank, the second methane tank and the third methane tank are mutually isolated, the tops of the first methane tank, the second methane tank and the third methane tank are communicated, and the top of the first methane tank is provided with a dome; the heights of the first methane tank, the second methane tank and the third methane tank are reduced in sequence.
A first feeding pipe is arranged in the first methane tank, a first feeding valve is arranged behind the first feeding pipe through a dome, and a mixing tank is arranged on the first feeding valve.
A second discharge pipe is arranged in the second methane tank, and the lower part of the second discharge pipe is close to the bottom of the second methane tank; a second discharge valve is arranged on the second discharge pipe after passing through the dome; the second discharge valve is arranged on the intermediate tank, the intermediate tank is provided with a second air pump valve, and the rear part of the second air pump valve is connected with an air pump through a pipeline.
The bottom of the intermediate tank is provided with a connecting pipe, the highest position of the connecting pipe is not lower than the height of the intermediate tank, and a mixing tank is arranged below an outlet of the connecting pipe.
A third discharge pipe is arranged in the third methane tank, and a third discharge valve is arranged behind the third discharge pipe through a dome.
The first biogas tank, the second biogas tank and the third biogas tank are built by concrete, and the volume ratio of the first biogas tank to the second biogas tank to the third biogas tank is 1: 1: 1.
a biogas fermentation method of a three-box biogas digester, which comprises the following steps,
firstly, putting a biogas mixture into a first biogas tank through a first feeding pipe, and then closing a first feeding valve, a second discharging valve and a third discharging valve;
secondly, after the biogas mixture is primarily fermented, repeating the first step until the fermented mixture in the first biogas tank overflows into the second biogas tank through the tank wall of the second biogas tank;
thirdly, after the mixture in the second methane tank is fermented for a period of time, opening a second discharge valve and a second air pump valve, opening an air pump to enable the air pump to be in an air pumping mode, and pumping the mixture at the bottom of the second methane tank into the intermediate tank;
fourthly, when the mixture in the intermediate tank reaches a specified material level, closing a second discharge valve;
fifthly, enabling the air pump to be in an air pumping mode, pressurizing the mixture in the intermediate tank, and pressing the mixture in the intermediate tank into the mixing tank;
sixthly, adding a fresh mixture into the mixing tank, and feeding the fresh mixture and the fermented mixture into the first methane tank again;
seventhly, repeating the second step to the sixth step to fully ferment the mixture in the second methane tank; simultaneously, the mixture in the first biogas tank can be fully fermented;
and step eight, after full fermentation, the mixed material slag in the second methane tank enters a third methane tank.
The period of time for the third step may be 1-3 days.
Claims (8)
1. A three-box methane tank is characterized in that: the methane tank comprises a first methane tank, a second methane tank and a third methane tank, wherein the first, second and third methane tanks are circular and arranged in concentric circles, and are respectively the first, second and third methane tanks from outside to inside; the bottoms of the first methane tank, the second methane tank and the third methane tank are mutually isolated, the tops of the first methane tank, the second methane tank and the third methane tank are communicated, and the top of the first methane tank is provided with a dome; the heights of the first biogas tank, the second biogas tank and the third biogas tank are reduced in sequence.
2. The three-tank biogas digester as claimed in claim 1, wherein: a first feeding pipe is arranged in the first methane tank, the first feeding pipe passes through the dome and then is provided with a first feeding valve, and a mixing tank is arranged on the first feeding valve.
3. The three-tank biogas digester as claimed in claim 1, wherein: a second discharge pipe is arranged in the second methane tank, and the lower part of the second discharge pipe is close to the bottom of the second methane tank; a second discharge valve is arranged on the second discharge pipe after the second discharge pipe passes through the dome; the second discharge valve is arranged on the intermediate tank, a second air pump valve is arranged on the intermediate tank, and the rear of the second air pump valve is connected with an air pump through a pipeline.
4. A three-tank biogas digester as claimed in claim 3, wherein: the bottom of the intermediate tank is provided with a connecting pipe, the highest position of the connecting pipe is not lower than the height of the intermediate tank, and the mixing tank is arranged below the outlet of the connecting pipe.
5. The three-tank biogas digester as claimed in claim 1, wherein: and a third discharge pipe is arranged in the third methane tank, and a third discharge valve is arranged behind the third discharge pipe through the dome.
6. The three-tank biogas digester as claimed in claim 1, wherein: the first biogas tank, the second biogas tank and the third biogas tank are built by concrete, and the volume ratio of the first biogas tank to the second biogas tank to the third biogas tank is 1: 1: 1.
7. a biogas fermentation method of a three-box biogas digester, which comprises the following steps,
firstly, putting a biogas mixture into the first biogas tank through the first feeding pipe, and then closing the first feeding valve, the second discharging valve and the third discharging valve;
after the biogas mixture is primarily fermented, repeating the first step until the fermented mixture in the first biogas tank overflows into the second biogas tank through the tank wall of the second biogas tank;
thirdly, after the mixture in the second methane tank is fermented for a period of time, opening the second discharge valve and the second air pump valve, opening the air pump to enable the air pump to be in an air pumping mode, and pumping the mixture at the bottom of the second methane tank into the intermediate tank;
fourthly, when the mixture in the intermediate tank reaches a specified material level, closing the second discharge valve;
fifthly, enabling the air pump to be in an air pumping mode, pressurizing the intermediate tank, and pressing the mixture in the intermediate tank into the mixing tank;
sixthly, adding a fresh mixture into the mixing tank, and feeding the fresh mixture and the fermented mixture into the first methane tank again;
seventhly, repeating the second step to the sixth step to fully ferment the mixture in the second methane tank; simultaneously, the mixture in the first biogas tank can be fully fermented;
and eighthly, after full fermentation, the mixed material slag in the second methane tank enters the third methane tank.
8. The biogas fermentation method of a three-tank biogas digester as claimed in claim 7, wherein: the period of time for the third step is 1-3 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011476809.3A CN112410190A (en) | 2020-12-15 | 2020-12-15 | Three-box methane tank and fermentation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011476809.3A CN112410190A (en) | 2020-12-15 | 2020-12-15 | Three-box methane tank and fermentation method |
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| CN112410190A true CN112410190A (en) | 2021-02-26 |
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| CN202011476809.3A Pending CN112410190A (en) | 2020-12-15 | 2020-12-15 | Three-box methane tank and fermentation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113045350A (en) * | 2021-04-07 | 2021-06-29 | 山东爱福地生物股份有限公司 | Method for producing organic fertilizer from livestock and poultry manure |
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2020
- 2020-12-15 CN CN202011476809.3A patent/CN112410190A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113045350A (en) * | 2021-04-07 | 2021-06-29 | 山东爱福地生物股份有限公司 | Method for producing organic fertilizer from livestock and poultry manure |
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Application publication date: 20210226 |