CN115725389A - Two-section type anaerobic digestion biogas production process device - Google Patents
Two-section type anaerobic digestion biogas production process device Download PDFInfo
- Publication number
- CN115725389A CN115725389A CN202211474669.5A CN202211474669A CN115725389A CN 115725389 A CN115725389 A CN 115725389A CN 202211474669 A CN202211474669 A CN 202211474669A CN 115725389 A CN115725389 A CN 115725389A
- Authority
- CN
- China
- Prior art keywords
- anaerobic digester
- biogas
- tank
- communicated
- baffle plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000029087 digestion Effects 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 230000007062 hydrolysis Effects 0.000 claims abstract description 29
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 29
- 230000020477 pH reduction Effects 0.000 claims abstract description 29
- 239000002253 acid Substances 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 239000002002 slurry Substances 0.000 claims abstract description 12
- 239000003895 organic fertilizer Substances 0.000 claims description 11
- 238000004062 sedimentation Methods 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 26
- 230000001105 regulatory effect Effects 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 abstract description 5
- 150000007524 organic acids Chemical class 0.000 abstract description 4
- 239000007787 solid Substances 0.000 abstract description 4
- 239000007791 liquid phase Substances 0.000 abstract description 3
- 239000007790 solid phase Substances 0.000 abstract description 3
- 239000002893 slag Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 19
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 17
- 238000000034 method Methods 0.000 description 11
- 241000894006 Bacteria Species 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000012071 phase Substances 0.000 description 8
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 244000005700 microbiome Species 0.000 description 5
- 230000000789 acetogenic effect Effects 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000000813 microbial effect Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 230000002354 daily effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 230000003403 homoacetogenic effect Effects 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 230000000696 methanogenic effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008635 plant growth Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- ZDGGJQMSELMHLK-UHFFFAOYSA-N m-Trifluoromethylhippuric acid Chemical compound OC(=O)CNC(=O)C1=CC=CC(C(F)(F)F)=C1 ZDGGJQMSELMHLK-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000000896 monocarboxylic acid group Chemical group 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 1
Images
Classifications
-
- 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
Abstract
The invention discloses a two-stage anaerobic digestion biogas production process device, which comprises a fully-mixed hydrolysis acidification tank, a regulating tank, a primary anaerobic digester and a secondary anaerobic digester which are sequentially arranged, wherein the fully-mixed hydrolysis acidification tank is communicated with the regulating tank, the regulating tank is communicated with the lower part of the primary anaerobic digester, the primary anaerobic digester is communicated with the secondary anaerobic digester, the secondary anaerobic digester is connected with a biogas slurry pool, the fully-mixed hydrolysis acidification tank, the primary anaerobic digester and the secondary anaerobic digester are communicated with a gas storage cabinet, and the lower part of the fully-mixed hydrolysis acidification tank is communicated with a biogas residue storage yard. The invention divides the raw material for producing the methane into an acid liquid phase and a methane slag solid phase by utilizing the fully-mixed hydrolysis acidification tank, is only suitable for the acid liquid with more organic acid content to implement the anaerobic digestion stage, has higher controllability compared with the traditional methane engineering, and simultaneously avoids the problems of pipeline blockage and the like caused by excessive solid suspended matters so as to improve the efficiency of producing the methane by anaerobic digestion.
Description
Technical Field
The invention belongs to the technical field of processing equipment, and particularly relates to a two-section type process device for producing biogas through anaerobic digestion.
Background
Anaerobic digestion refers to a process in which organic matters are degraded by facultative bacteria and anaerobic bacteria under an anaerobic condition to generate methane, and the anaerobic digestion process is an extremely complex microbial chemical reaction process and takes part in reactions by various microorganisms. In the anaerobic digestion metabolic process, the anaerobic digestion reaction process is generally considered to be divided into three stages, namely a hydrolysis acidification stage, a hydrogen-producing acetogenic stage and a methanogenic stage, and the complex reaction process needs hydrolysis acidification bacteria, hydrogen-producing acetogenic bacteria, methanogenic bacteria and homoacetogenic bacteria to participate in the three metabolic stages together and interact with each other.
Wherein, the hydrolysis acidification stage: the hydrolysis acidification stage is divided into two steps, namely, water-insoluble macromolecular organic matters (such as polysaccharide, protein, lipid, cellulose and the like) are hydrolyzed into simple water-soluble micromolecular organic matters (such as glucose, amino acid, fatty acid, glycerol and the like) through the action of hydrolysis acidification bacteria outside microbial cells, and then the fermentation bacteria continue to degrade the soluble micromolecular organic matters generated by hydrolysis into simple products (such as volatile organic acids, alcohols, ammonia, CO and the like) through the participation of different hydrolytic enzymes in the microbial cells 2 、H 2 S、H 2 Etc.).
Hydrogen production and acetic acid production stages: the end product of hydrolytic acidification is further converted into acetic acid and H by hydrogen-producing acetogenic bacteria 2 、CO 2 Etc. H simultaneously with the function of hydrogen-producing acetogenic bacteria 2 And CO 2 Reacting under the action of homoacetogenic bacteria to generate acetic acid, and reacting in anaerobic digestionIn the process H 2 And CO 2 Can directly generate CH 4 H can also be produced by homoacetogens 2 And CO 2 Acetic acid is synthesized and decomposed into CH 4 Two kinds of generation of CH 4 The method (2) is shown in the following reaction formulas (1) and (2):
the reaction formula of the acetic acid for producing methane is as follows: CH (CH) 3 COOH→CH 4 +CO 2 (1)
H 2 And CO 2 The reaction formula for producing methane: CO 2 2 +4H 2 →CH 4 +2H 2 O (2)
A methanogenesis stage: the methanogenesis stage is to produce the end product H of the hydrogen-producing acetogenesis stage 2 、CO 2 With acetic acid and simple methyl compounds to produce CH under the action of methanogens 4 The process of (1). In the course of general anaerobic digestion, CH produced by decomposition of acetic acid 4 About 70% by weight, has H 2 And CO 2 Generated CH 4 About 30%.
In the traditional biogas engineering, all stages of anaerobic digestion are carried out in the same reactor, the anaerobic digestion is a complex process, all parameters are seriously coupled, a certain parameter variable is singly researched, the maximum limit of the methane yield cannot be embodied, and meanwhile, the raw material is feed liquid with large solid content, so that the problems of crusting and pipeline blockage exist in the traditional biogas engineering, and the defects of large occupied area of treatment equipment and poor system economy can be caused. Therefore, it is an urgent technical problem to be solved by the skilled person in the art to provide a two-stage process device for producing biogas by anaerobic digestion, which collects the useful volatile fatty acids of the raw materials in the form of acid solution and can achieve a higher biogas production effect by effective adjustment in the subsequent anaerobic digestion process.
Disclosure of Invention
The invention mainly aims to provide a two-section type anaerobic digestion biogas production process device, which solves the problems of incrustation and pipeline blockage in the traditional biogas engineering and avoids the defects of large occupied area of treatment equipment and poor system economy.
According to a first aspect of the invention, a two-stage process device for producing biogas through anaerobic digestion is provided, which comprises a fully-mixed hydrolysis acidification tank, a regulating tank, a primary anaerobic digester and a secondary anaerobic digester which are sequentially arranged, wherein the fully-mixed hydrolysis acidification tank is communicated with the regulating tank through a first pump, the regulating tank is used for regulating the pH value of acid liquor in the regulating tank to be in a range of 7.0-7.5, the regulating tank is communicated with the lower part of the primary anaerobic digester through a second pump, the primary anaerobic digester is communicated with the lower part of the secondary anaerobic digester through a third pump, the lower part of the secondary anaerobic digester is connected with a biogas slurry pool through a pipeline, the tops of the fully-mixed hydrolysis acidification tank, the primary anaerobic digester and the secondary anaerobic digester are communicated with a gas storage cabinet through pipelines, and the lower part of the fully-mixed hydrolysis acidification tank is communicated with a biogas residue storage yard.
In a specific embodiment of the invention, a first three-phase separator is arranged in the primary anaerobic digester, the first three-phase separator comprises a first baffle plate and a second baffle plate positioned on the inner wall of the primary anaerobic digester, a first settling zone is formed above the first baffle plate, a first backflow seam is formed between the first baffle plate and the second baffle plate, a first gas pipe communicated with a gas chamber in the first baffle plate is arranged at the top of the first baffle plate, the first gas pipe extends upwards to a position below a biogas outlet of the primary anaerobic digester, a liquid outlet of the primary anaerobic digester is positioned above the first baffle plate, and the liquid outlet is communicated with a third pump through a pipeline.
In a specific embodiment of the invention, a second three-phase separator is arranged in the secondary anaerobic digester, the second three-phase separator comprises a third baffle and a fourth baffle positioned on the inner wall of the secondary anaerobic digester, a second sedimentation area is formed above the third baffle, a second backflow seam is formed between the third baffle and the fourth baffle, a second air pipe communicated with an air chamber in the third baffle is arranged at the top of the third baffle, and the second air pipe extends upwards to a position below a biogas outlet of the secondary anaerobic digester.
In a specific embodiment of the invention, an acid liquor temporary storage tank is arranged between the primary anaerobic digester and the third pump.
In a specific embodiment of the invention, a fourth pump and an acid liquor storage tank are arranged between the fully mixed hydrolysis acidification tank and the first pump.
In a particular embodiment of the invention, the acid storage tank, the conditioning tank and the acid storage tank are identical in geometry.
In a specific embodiment of the invention, the outlet of the gas storage cabinet is connected with a condenser and a compressor in sequence, and the compressor compresses the methane into a gas cylinder.
In a specific embodiment of the invention, the biogas slurry pool is communicated to the animal and plant cultivation area through a screw pump, and the screw pump pumps the biogas slurry in the biogas slurry pool to the animal and plant cultivation area.
In a specific embodiment of the invention, the biogas residue yard is communicated to an organic fertilizer workshop, and the organic fertilizer workshop prepares biogas residues into organic fertilizer.
One of the above technical solutions of the present invention has at least one of the following advantages or beneficial effects: the invention divides the raw material for producing the biogas into an acid liquid phase and a biogas residue solid phase by using the full-mixing hydrolysis acidification tank, only applies the acid liquid with more organic acid content to implement the anaerobic digestion stage, has higher controllability compared with the traditional biogas engineering, and simultaneously avoids the problems of pipeline blockage and the like caused by excessive solid suspended matters so as to improve the efficiency of producing the biogas by anaerobic digestion. The invention also arranges a first-stage anaerobic digester and a second-stage anaerobic digester, wherein COD in the first-stage anaerobic digester ranges from 3 to 1 ten thousand, and COD in the second-stage anaerobic digester ranges from 1 to 3 thousand, and the reduction of COD is controlled step by step, so as to improve the stability of the whole system.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, and may be, for example, a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other elements or indirectly connected through one or more other elements or in an interactive relationship between two elements.
The following disclosure provides many different embodiments, or examples, for implementing different aspects of the invention.
Referring to fig. 1, the two-stage anaerobic digestion biogas production process device comprises a full-mixing type hydrolysis acidification tank 1, an adjusting tank 3, a primary anaerobic digester 4 and a secondary anaerobic digester 11 which are sequentially arranged, wherein the full-mixing type hydrolysis acidification tank 1 is communicated with the adjusting tank 3 through a first pump 51, the adjusting tank 3 is used for adjusting the pH value of acid liquor in the adjusting tank 3 to enable the pH value to be within the range of 7.0-7.5, the adjusting tank 3 is communicated with the lower part of the primary anaerobic digester 4 through a second pump 52, the primary anaerobic digester 4 is communicated with the lower part of the secondary anaerobic digester 11 through a third pump 53, the lower part of the secondary anaerobic digester 11 is connected with a biogas liquid pool 14 through a pipeline, the tops of the full-mixing type hydrolysis acidification tank 1, the primary anaerobic digester 4 and the secondary anaerobic digester 11 are communicated with a gas storage cabinet 6 through pipelines, and the lower part of the full-mixing type hydrolysis acidification tank 1 is communicated with a biogas residue storage yard 12. The hydraulic retention time of the first-stage anaerobic digester 4 is 16 days, namely the average daily feeding amount and the average daily discharging amount are 1/16 of the tank volume, 3 times of feeding and discharging time are set every day, the time interval is 8 hours, namely the second pump 52 and the third pump 53 work every 8 hours, the discharging material of the first-stage anaerobic digester 4 enters the second-stage anaerobic digester 11, the pH value, the ORP value, the temperature value and the like are measured in the tank, and the first-stage anaerobic digester 4 and the second-stage anaerobic digester 11 are monitored.
According to the invention, the raw material for producing the biogas is divided into an acid liquid phase and a biogas residue solid phase by using the fully-mixed hydrolysis acidification tank 1, and the anaerobic digestion stage is implemented only by using the acid liquid with a large organic acid content, so that the method has higher controllability compared with the traditional biogas engineering, and simultaneously avoids the problems of pipeline blockage and the like caused by excessive solid suspended matters, thereby improving the efficiency of producing the biogas by anaerobic digestion. The invention also controls the reduction of COD step by arranging the first-stage anaerobic digester 4 and the second-stage anaerobic digester 11, wherein the COD in the first-stage anaerobic digester 4 is from 3 to 1 ten thousand, and the COD in the second-stage anaerobic digester 11 is from 1 to 3 thousand, so as to improve the stability of the whole system.
In an embodiment of the present invention, a first three-phase separator is disposed in the primary anaerobic digester 4, the first three-phase separator includes a first baffle plate 41 and a second baffle plate 42 located on an inner wall of the primary anaerobic digester 4, a first settling zone is formed above the first baffle plate 41, a first return slit 44 is formed between the first baffle plate 41 and the second baffle plate 42, a first gas pipe 43 communicating with a gas chamber in the first baffle plate 41 is disposed at the top of the first baffle plate 41, the first gas pipe 43 extends upward to a position below a biogas outlet of the primary anaerobic digester 4, a liquid outlet of the primary anaerobic digester 4 is located above the first baffle plate 41, and the liquid outlet is communicated with the third pump 53 through a pipeline. Biogas bubbles in the primary anaerobic digester 4 enter a gas chamber below the first baffle plate 41, are discharged through water sealing treatment through a first gas pipe 43, and are finally discharged to the gas storage cabinet 6 through a biogas outlet of the primary anaerobic digester 4, a solid-liquid mixture enters a settling zone through a first backflow seam 44, sludge in the settling zone rises to the top under the drive of the bubbles formed by the biogas generated by microorganisms, and the microorganisms return to a sludge layer under the barrier of the first baffle plate 41 for recycling.
In an embodiment of the invention, a second three-phase separator is arranged in the secondary anaerobic digester 11, the second three-phase separator comprises a third baffle 111 and a fourth baffle 112 positioned on the inner wall of the secondary anaerobic digester 11, a second settling zone is formed above the third baffle 111, a second backflow seam 114 is formed between the third baffle 111 and the fourth baffle 112, a second air pipe 113 communicated with an air chamber in the third baffle 111 is arranged at the top of the third baffle 111, and the second air pipe 113 extends upwards to a position below a biogas outlet of the secondary anaerobic digester 11. The methane bubbles in the secondary anaerobic digester 11 enter the gas chamber below the third baffle 111, are discharged through water sealing treatment by the second gas pipe 113, the methane is finally discharged to the gas storage cabinet 6 through the methane outlet of the secondary anaerobic digester 11, the solid-liquid mixture enters the settling zone through the second backflow seam 114, the sludge in the settling zone rises to the top under the drive of the bubbles formed by the methane generated by the microorganisms, and the microorganisms return to the sludge layer under the block of the third baffle 111 for recycling.
In one embodiment of the present invention, an acid liquor temporary storage tank 10 is disposed between the primary anaerobic digester 4 and the third pump 53, the acid liquor temporary storage tank 10 is used for conveying acid liquor from the primary anaerobic digester 4 to the secondary anaerobic digester 11 at a fixed or fixed time by the third pump 53 according to the processing rate of the secondary anaerobic digester 11.
In one embodiment of the present invention, a fourth pump 54 and an acid storage tank 2 are disposed between the fully mixed hydrolysis-acidification tank 1 and the first pump 51. The fourth pump 54 sends the acid liquor in the fully mixed hydrolysis acidification tank 1 to the acid liquor storage tank 2 for storage, and the first pump 51 sends the acid liquor storage tank 2 to the first-stage anaerobic digester 4.
In an embodiment of the present invention, the acid storage tank, the adjustment tank 3 and the acid storage tank 10 have the same geometric shape, and the temperature of each tank can be set according to the reaction process of normal temperature (below 35 ℃), medium temperature (35-40 ℃), and high temperature (50-55 ℃) to obtain the best economic benefit.
In one embodiment of the invention, the outlet of the gas storage cabinet 6 is sequentially connected with a condenser 7 and a compressor 8, moisture in the biogas is removed from the biogas discharged from the outlet of the gas storage cabinet 6 through the condenser 7, and the dehydrated biogas is compressed into a gas cylinder 9 through the compressor 8.
In one embodiment of the present invention, the biogas slurry pool 14 is communicated to the animal and plant cultivation area 16 through a screw pump 15, and the screw pump pumps the biogas slurry in the biogas slurry pool 14 to the animal and plant cultivation area 16 for plant growth and animal consumption, so as to improve the utilization rate of resources.
In one embodiment of the invention, the biogas residue yard 12 is communicated to an organic fertilizer plant 13, and the organic fertilizer plant 13 prepares biogas residues into organic fertilizer. Specifically, biogas residues in the product of the full-mixing type hydrolysis acidification tank 1 enter a biogas residue storage yard 12 to be stacked, and biogas residues in the biogas residue storage yard 12 enter an organic fertilizer workshop to prepare an organic fertilizer which can be used as a fertilizer for plant growth, so that the recycling of the biogas residues is realized.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. The two-stage anaerobic digestion biogas production process device is characterized by comprising a full-mixing type hydrolysis acidification tank, an adjusting tank, a primary anaerobic digester and a secondary anaerobic digester which are sequentially arranged, wherein the full-mixing type hydrolysis acidification tank is communicated with the adjusting tank through a first pump, the adjusting tank is used for adjusting the pH value of acid liquid in the adjusting tank to enable the pH value to be in the range of 7.0-7.5, the adjusting tank is communicated with the lower part of the primary anaerobic digester through a second pump, the primary anaerobic digester is communicated with the lower part of the secondary anaerobic digester through a third pump, the lower part of the secondary anaerobic digester is connected with a biogas slurry pool through a pipeline, the tops of the full-mixing type hydrolysis acidification tank, the primary anaerobic digester and the secondary anaerobic digester are communicated with a biogas storage tank through pipelines, and the lower part of the full-mixing type hydrolysis acidification tank is communicated with a biogas residue storage yard.
2. The two-stage anaerobic digestion biogas production process device according to claim 1, wherein a first three-phase separator is arranged in the first stage anaerobic digester, the first three-phase separator comprises a first baffle plate and a second baffle plate positioned on the inner wall of the first stage anaerobic digester, a first settling zone is formed above the first baffle plate, a first backflow seam is formed between the first baffle plate and the second baffle plate, a first gas pipe communicated with a gas chamber in the first baffle plate is arranged at the top of the first baffle plate, the first gas pipe extends upwards to a position below a biogas outlet of the first stage anaerobic digester, a liquid outlet of the first stage anaerobic digester is positioned above the first baffle plate, and the liquid outlet is communicated with a third pump through a pipeline.
3. The two-stage anaerobic digestion biogas production process device according to claim 1 or 2, wherein a second three-phase separator is arranged in the secondary anaerobic digester, the second three-phase separator comprises a third baffle plate and a fourth baffle plate positioned on the inner wall of the secondary anaerobic digester, a second sedimentation zone is formed above the third baffle plate, a second backflow seam is formed between the third baffle plate and the fourth baffle plate, a second gas pipe communicated with a gas chamber in the third baffle plate is arranged at the top of the third baffle plate, and the second gas pipe extends upwards to below a biogas outlet of the secondary anaerobic digester.
4. The two-stage anaerobic digestion biogas production process device according to claim 1 or 2, characterized in that an acid liquor temporary storage tank is arranged between the primary anaerobic digester and the third pump.
5. The two-stage type anaerobic digestion biogas production process device according to claim 4, wherein a fourth pump and an acid liquor storage tank are arranged between the fully mixed hydrolysis acidification tank and the first pump.
6. The two-stage anaerobic digestion biogas production process device according to claim 5, wherein the acid storage tank, the adjusting tank and the acid temporary storage tank have identical geometric shapes.
7. The two-stage anaerobic digestion biogas production process device according to claim 1, wherein the outlet of the gas storage tank is connected with a condenser and a compressor in sequence, and the compressor compresses biogas into a gas cylinder.
8. The two-stage anaerobic digestion biogas production process device according to claim 1, wherein the biogas slurry tank is communicated to the animal and plant cultivation area through a screw pump, and the screw pump pumps the biogas slurry in the biogas slurry tank to the animal and plant cultivation area.
9. The two-stage anaerobic digestion biogas production process device according to claim 1, wherein the biogas residue yard is communicated to an organic fertilizer workshop, and the organic fertilizer workshop prepares biogas residues into organic fertilizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211474669.5A CN115725389A (en) | 2022-11-23 | 2022-11-23 | Two-section type anaerobic digestion biogas production process device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211474669.5A CN115725389A (en) | 2022-11-23 | 2022-11-23 | Two-section type anaerobic digestion biogas production process device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115725389A true CN115725389A (en) | 2023-03-03 |
Family
ID=85298011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211474669.5A Pending CN115725389A (en) | 2022-11-23 | 2022-11-23 | Two-section type anaerobic digestion biogas production process device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115725389A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101009463B1 (en) * | 2010-11-12 | 2011-01-19 | 주식회사 한텍엔지니어링 | Apparatus for three phases separation in anaerobic waste water digestion facilities |
| CN103288207A (en) * | 2012-02-28 | 2013-09-11 | 沈炳国 | Integrated secondary-fermentation anaerobic digestion tank |
| CN108483641A (en) * | 2018-04-12 | 2018-09-04 | 南宁绿智环保科技有限公司 | A kind of Multistage self-circulation anaerobic digestion reaction vessel and its working method |
| CN208995481U (en) * | 2018-10-05 | 2019-06-18 | 北京汇园生态科技有限公司 | The anaerobic digester system of feces of livestock and poultry and stalk |
-
2022
- 2022-11-23 CN CN202211474669.5A patent/CN115725389A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101009463B1 (en) * | 2010-11-12 | 2011-01-19 | 주식회사 한텍엔지니어링 | Apparatus for three phases separation in anaerobic waste water digestion facilities |
| CN103288207A (en) * | 2012-02-28 | 2013-09-11 | 沈炳国 | Integrated secondary-fermentation anaerobic digestion tank |
| CN108483641A (en) * | 2018-04-12 | 2018-09-04 | 南宁绿智环保科技有限公司 | A kind of Multistage self-circulation anaerobic digestion reaction vessel and its working method |
| CN208995481U (en) * | 2018-10-05 | 2019-06-18 | 北京汇园生态科技有限公司 | The anaerobic digester system of feces of livestock and poultry and stalk |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101565719B (en) | Method for producing methane by two-phase multi-stage anaerobic fermentation of organic solid wastes | |
| US7556737B2 (en) | Anaerobic phased solids digester for biogas production from organic solid wastes | |
| EP2521768B1 (en) | Apparatus and preculture tank for biomethanation of biomass | |
| CN101638670B (en) | Method for co-producing hydrogen and methane by utilizing dry anaerobic fermentation of solid organic wastes | |
| CN102321675B (en) | Method and device for producing bio-gas by organic waste | |
| CN101778944A (en) | Method for the conversion of biomass from renewable raw materials in anaerobic fermenters | |
| CN104630283A (en) | System and method for bi-phase pressure anaerobic fermentation processing perishable waste for preparing marsh gas | |
| CN109401947B (en) | Sludge and kitchen waste co-digestion system and operation method thereof | |
| Lay et al. | Continuous anaerobic hydrogen and methane production using water hyacinth feedstock | |
| CN103992012A (en) | Recycling system and technique for producing wastewater by cellulosic ethanol | |
| CN107529552A (en) | Electromagnetism strengthens the method and device of wood fibre liquefaction jet cyclone multistage energy | |
| CN103243123A (en) | Novel recycling technology for high-value conversion of tubers vinasse | |
| CN102586336B (en) | Two-stage conversion method for producing bio-methane | |
| CN106883984B (en) | Lignocellulose material high-efficiency methane production device and method | |
| CN114671521B (en) | MBR biological flow separation two-phase upflow anaerobic digestion reactor | |
| CN115725389A (en) | Two-section type anaerobic digestion biogas production process device | |
| Lin et al. | High-strength wastewater treatment using anaerobic processes | |
| KR100692249B1 (en) | High rate methanc production system using anaerobic archaea | |
| CN211311474U (en) | Anaerobic digestion integration equipment | |
| CN108841580B (en) | Hydrogen-producing and methane-producing reactor for treating solid waste | |
| CN109207345B (en) | Device and process for coupling corn straw ethanol fermentation with municipal sludge anaerobic co-digestion | |
| CN207391436U (en) | Electromagnetism strengthens the device of wood fibre liquefaction-jet stream cyclone multistage energy | |
| CN111592974A (en) | Three-phase integrated plug flow type biogas fermentation system and fermentation method | |
| CN109628500A (en) | 3H efficient anaerobic fermentation solid organic castoff producing methane technology | |
| CN220788576U (en) | Anaerobic fermentation device taking ethanol as intermediate product of kitchen waste |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |