CN210559929U - Thermal hydrolysis recycling system for anaerobic digestion biogas slurry of livestock and poultry feces - Google Patents
Thermal hydrolysis recycling system for anaerobic digestion biogas slurry of livestock and poultry feces Download PDFInfo
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- CN210559929U CN210559929U CN201921231573.XU CN201921231573U CN210559929U CN 210559929 U CN210559929 U CN 210559929U CN 201921231573 U CN201921231573 U CN 201921231573U CN 210559929 U CN210559929 U CN 210559929U
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- 238000009283 thermal hydrolysis Methods 0.000 title claims abstract description 30
- 230000029087 digestion Effects 0.000 title claims abstract description 16
- 238000004064 recycling Methods 0.000 title claims abstract description 13
- 239000002002 slurry Substances 0.000 title abstract description 23
- 244000144972 livestock Species 0.000 title abstract description 9
- 244000144977 poultry Species 0.000 title abstract description 9
- 210000003608 fece Anatomy 0.000 title abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 238000006243 chemical reaction Methods 0.000 claims abstract description 43
- 238000002156 mixing Methods 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims description 27
- 239000002994 raw material Substances 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000026676 system process Effects 0.000 abstract description 2
- 238000000855 fermentation Methods 0.000 description 9
- 230000002550 fecal effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000010865 sewage Substances 0.000 description 8
- 230000004151 fermentation Effects 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 239000005416 organic matter Substances 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 239000010871 livestock manure Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000006065 biodegradation reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005297 material degradation process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The utility model relates to a thermal hydrolysis recycling system of livestock and poultry feces anaerobic digestion biogas slurry, which comprises a homogenizing pool, an anaerobic digester, a blending tank, a thermal hydrolysis reaction tank, a buffer tank, a solid-liquid separator, a three-way valve and a valve; the homogenizing tank, the anaerobic digester, the blending tank, the thermal hydrolysis reaction tank and the cache tank are sequentially connected; the anaerobic digester is connected with the solid-liquid separator A and the blending tank through a three-way valve; the blending tank, the thermal hydrolysis reaction tank and the buffer tank form a thermal hydrolysis unit; the upper ends of the blending tank, the thermal hydrolysis reaction tank and the cache tank are all provided with pipelines with valves and are communicated with one another; the rear end of the buffer tank is connected with a solid-liquid separator B, and the solid-liquid separator B is connected with a homogenizing pool. The utility model has the advantages that: the system process realizes the recycling of part of biogas slurry, reduces the treatment cost of the rear-end biogas slurry, and meanwhile, the biogas slurry after thermal hydrolysis treatment is rich in organic matters easy to biodegrade and can increase the gas production rate of raw materials in the anaerobic digester after being recycled for anaerobic digestion.
Description
Technical Field
The utility model relates to an anaerobic digestion natural pond liquid recycling system especially relates to a beasts and birds excrement is dirty anaerobism digestion natural pond liquid pyrohydrolysis recycling system.
Background
The medium-temperature wet anaerobic fermentation technology is a mainstream process of large-scale biogas engineering taking livestock and poultry manure as a raw material. However, the process has the following problems: although the retention time of the fecal sewage raw material in the reactor is longer (25-30 days) in large-scale biogas engineering, the fecal sewage raw material contains partial organic matters which are difficult to biodegrade, so that the biodegradation rate of the fecal sewage is still low, the biodegradation rate of the large-scale livestock and poultry fecal sewage biogas engineering is only 40% -50% at present, the gas production rate of the raw material is low, and the income of biogas power generation and purification projects is poor. In addition, the fermentation liquor after anaerobic digestion contains more organic matters, which causes difficulty in subsequent digestion and disposal of the biogas slurry.
The current treatment modes of the biogas slurry include the following modes: 1) a land utilization mode, namely returning biogas slurry to the field, is greatly influenced by regions and seasons, and is difficult to be effectively consumed in scarce places of farmlands; 2) in an industrial treatment mode, a large amount of organic matters in the biogas slurry are degraded, and simultaneously nitrogen and phosphorus are removed, so that the effluent reaches the standard and is discharged, but the treatment cost is high due to the complex components of the biogas slurry and the high contents of SS, COD, ammonia nitrogen and the like compared with the common wastewater; 3) the high-added-value development mode is to properly concentrate biogas slurry to prepare liquid fertilizer, but the mode is not mature and the cost is high. The consumption and disposal of biogas slurry have become major factors restricting the development of large-scale biogas projects.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough among the prior art, providing a beasts and birds excrement and urine anaerobic digestion natural pond liquid pyrohydrolysis recycling system, rich in the organic matter of easy biodegradable in the natural pond liquid after handling, but retrieval and utilization to front end anaerobic digestion makes rear end natural pond liquid handling capacity reduce, and the gas rate is produced to multiplicable front end marsh gas simultaneously.
The livestock and poultry manure anaerobic digestion biogas slurry pyrohydrolysis recycling system comprises a homogenizing pool, an anaerobic digester, a blending tank, a pyrohydrolysis reaction tank, a cache tank, a solid-liquid separator, a three-way valve and a valve; the homogenizing tank, the anaerobic digester, the blending tank, the thermal hydrolysis reaction tank and the cache tank are sequentially connected; the anaerobic digester is connected with the solid-liquid separator A and the blending tank through a three-way valve; the blending tank, the thermal hydrolysis reaction tank and the buffer tank form a thermal hydrolysis unit; the upper ends of the blending tank, the thermal hydrolysis reaction tank and the cache tank are all provided with pipelines with valves and are communicated with one another; the rear end of the buffer tank is connected with a solid-liquid separator B, and the solid-liquid separator B is connected with a homogenizing pool.
Preferably, the method comprises the following steps: the homogenizing tank is connected with the anaerobic digester through a material pump A, the anaerobic digester is connected with the three-way valve through a material pump B, the blending tank is connected with the pyrohydrolysis reaction tank through a material pump C, the pyrohydrolysis reaction tank is connected with the cache tank through a valve, the cache tank is connected with the solid-liquid separator B through a material pump D, and the solid-liquid separator B is connected with the homogenizing tank through a material pump E.
Preferably, the method comprises the following steps: the homogenizing tank, the anaerobic digester and the blending tank are all provided with top stirrers, and the top stirrers adopt an upper double-blade mode and a lower double-blade mode.
Preferably, the method comprises the following steps: the top of the pyrohydrolysis reaction tank is provided with a steam evacuation valve, and the bottom of the pyrohydrolysis reaction tank is connected with a steam pipeline.
Preferably, the method comprises the following steps: each pyrohydrolysis unit is provided with a blending tank, a buffer tank and a plurality of pyrohydrolysis reaction tanks.
The utility model has the advantages that: the utility model discloses a allotment is carried out the zymotic fluid, then carries out the pyrohydrolysis through high temperature high pressure steam to allotment liquid and handles, under pyrohydrolysis and steam explosion effect, the macromolecule organic matter of difficult degradation converts the easy degradation organic matter in the allotment liquid, and after solid-liquid separation, the natural pond liquid that is rich in the easy degradation organic matter returns to the even pulp chest of front end for the allotment water of the dirty raw materials of excrement. The system process realizes the recycling of part of the biogas slurry, reduces the treatment cost of the rear-end biogas slurry, meanwhile, the biogas slurry after the thermal hydrolysis treatment is rich in organic matters easy to biodegrade, can increase the gas production rate of raw materials in an anaerobic digester after being recycled for anaerobic digestion, and can shorten the material degradation time by 5-8 days.
Drawings
FIG. 1 is a schematic structural view of the system for thermal hydrolysis and recycling of biogas slurry in anaerobic digestion of livestock and poultry manure;
FIG. 2 is a flow chart of the working process of the thermal hydrolysis recycling system for anaerobic digestion biogas slurry of livestock and poultry feces.
Description of reference numerals: the system comprises a homogenizing pool 1, an anaerobic digester 2, a blending tank 3, a thermal hydrolysis reaction tank 4, a buffer tank 5, a solid-liquid separator A6, a solid-liquid separator B7, a top stirrer A8, a top stirrer B9, a top stirrer C10, a material pump A11, a material pump B12, a material pump C13, a material pump D14, a material pump E15, a three-way valve 16 and a valve 17.
Detailed Description
The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
As shown in fig. 1 to 2, the thermal hydrolysis recycling system for anaerobic digestion biogas slurry of livestock and poultry feces comprises a homogenizing pool 1, an anaerobic digester 2, a blending tank 3, a thermal hydrolysis reaction tank 4, a buffer tank 5, a solid-liquid separator, a top stirrer, a material pump, a three-way valve 16 and a valve 17. The homogenizing tank 1, the anaerobic digester 2, the blending tank 3, the thermal hydrolysis reaction tank 4 and the buffer tank 5 are connected in sequence; the anaerobic digester 2 is connected with a solid-liquid separator A6 and a blending tank 3 through a three-way valve 16, one part of fermentation liquor enters the solid-liquid separator A6, and the other part of fermentation liquor enters the blending tank 3; the blending tank 3, the thermal hydrolysis reaction tank 4 and the buffer tank 5 form a thermal hydrolysis unit; the upper ends of the blending tank 3, the thermal hydrolysis reaction tank 4 and the cache tank 5 are respectively provided with a pipeline with a valve and are communicated with each other, and steam exhaust gas in the thermal hydrolysis reaction tank 4 and the cache tank 5 after thermal hydrolysis reaction flows into the blending tank 3 through a top pipeline and is used for pre-heating materials in the blending tank 3; the fermentation liquor after the completion of the thermal hydrolysis is temporarily stored in a buffer tank 5, the rear end of the buffer tank 5 is connected with a solid-liquid separator B7, a solid-liquid separator B7 is connected with a homogenizing pool 1 at the front end, and the liquid after the solid-liquid separation is returned to the homogenizing pool 1 for preparing water for the fecal sewage raw material. The method comprises the following specific steps:
step 1), preparing a fecal sewage raw material with a certain concentration (the solid content TS is 11% -12%) in a homogenizing pool 1, and sending the fecal sewage raw material into an anaerobic digester 2 by a material pump 11 to perform medium-temperature (38 ℃) wet anaerobic fermentation;
step 2), after fermenting for a certain time, feeding a part of fermentation liquor (TS is 7% -8%) into a solid-liquid separator A6 to be separated into biogas residues (TS is 25% -30%) and biogas slurry (TS is 3% -5%), feeding the other part of fermentation liquor into a blending tank 3, and blending the fermentation liquor and the separated biogas residues into concentrated liquid with TS of about 15%;
step 3), feeding the concentrated solution with the TS of 15% into a thermal hydrolysis reaction tank 4, introducing 130 ℃ saturated steam from the bottom of the thermal hydrolysis reaction tank 4, keeping the pressure in the thermal hydrolysis reaction tank 4 at about 0.3MPa, and keeping the temperature and the pressure for about 30 min;
step 4), opening a valve 17 between the pyrohydrolysis reaction tank 4 and the buffer tank 5, feeding the materials in the pyrohydrolysis reaction tank 4 into the buffer tank 5 under the steam explosion effect formed by high-pressure steam pressure, and simultaneously returning steam exhaust gas in the pyrohydrolysis reaction tank 4 and the buffer tank 5 into the distribution tank 3 through a tank body top pipeline to pre-heat the materials in the distribution tank 3;
and step 5), the materials in the buffer tank 5 enter a solid-liquid separator B7, and are separated to obtain biogas residues (TS is 25% -30%) and biogas slurry (TS is 3% -5%), wherein the biogas slurry is rich in easily degradable organic matters and returns to the front end homogenizing pool 1 to be used for preparing water of the fecal sewage raw material, and the biogas residues can be subsequently used for preparing organic fertilizers. Because the pyrohydrolysis unit is provided with a plurality of pyrohydrolysis reaction tanks 4, the whole system can be continuously operated.
The homogenizing tank 1 is connected with the anaerobic digester 2 through a material pump A11, the anaerobic digester 2 is connected with a three-way valve 16 through a material pump B12, the blending tank 3 is connected with the pyrohydrolysis reaction tank 4 through a material pump C13, the pyrohydrolysis reaction tank 4 is connected with the buffer tank 5 through a valve 17, the buffer tank 5 is connected with the solid-liquid separator B7 through a material pump D14, and the solid-liquid separator B7 is connected with the homogenizing tank 1 through a material pump E15.
The solid-liquid separator adopts a solid-liquid separator combining an inclined sieve and screw extrusion, and biogas residues after solid-liquid separation by the solid-liquid separator A6 are sent into the blending tank 3 by a screw pump.
The homogenizing tank 1, the anaerobic digester 2 and the blending tank 3 are all provided with top stirrers which adopt an upper double-blade mode and a lower double-blade mode to prevent material deposition and surface crusting.
The top of the pyrohydrolysis reaction tank 4 is provided with a steam evacuation valve as a tank body protection device. The bottom of the pyrohydrolysis reaction tank 4 is connected with a steam pipeline for heating and pressurizing the reaction tank.
Each pyrohydrolysis unit is provided with a blending tank 3 and a cache tank 5, and a plurality of pyrohydrolysis reaction tanks 4 are arranged according to the amount of treatment capacity to carry out alternate pyrohydrolysis reaction, so that the whole system can continuously run.
Claims (5)
1. Beasts and birds excrement is dirty anaerobism digestion natural pond liquid pyrohydrolysis recycling system, its characterized in that: comprises a homogenate pool (1), an anaerobic digester (2), a blending tank (3), a pyrohydrolysis reaction tank (4), a buffer tank (5), a solid-liquid separator, a three-way valve (16) and a valve (17); the homogenizing tank (1), the anaerobic digester (2), the blending tank (3), the pyrohydrolysis reaction tank (4) and the buffer tank (5) are sequentially connected; the anaerobic digester (2) is connected with a solid-liquid separator A (6) and a blending tank (3) through a three-way valve (16); the blending tank (3), the pyrohydrolysis reaction tank (4) and the buffer tank (5) form a pyrohydrolysis unit; the upper ends of the blending tank (3), the thermal hydrolysis reaction tank (4) and the cache tank (5) are all provided with pipelines with valves and are communicated with one another; the rear end of the buffer tank (5) is connected with a solid-liquid separator B (7), and the solid-liquid separator B (7) is connected with the homogenizing tank (1).
2. The system according to claim 1, characterized in that: the homogenizing tank (1) is connected with the anaerobic digester (2) through a material pump A (11), the anaerobic digester (2) is connected with a three-way valve (16) through a material pump B (12), the blending tank (3) is connected with the pyrohydrolysis reaction tank (4) through a material pump C (13), the pyrohydrolysis reaction tank (4) is connected with the cache tank (5) through a valve (17), the cache tank (5) is connected with the solid-liquid separator B (7) through a material pump D (14), and the solid-liquid separator B (7) is connected with the homogenizing tank (1) through a material pump E (15).
3. The system according to claim 1, characterized in that: the homogenizing tank (1), the anaerobic digester (2) and the blending tank (3) are all provided with top stirrers, and the top stirrers adopt an upper double-blade form and a lower double-blade form.
4. The system according to claim 1, characterized in that: the top of the pyrohydrolysis reaction tank (4) is provided with a steam evacuation valve, and the bottom of the pyrohydrolysis reaction tank (4) is connected with a steam pipeline.
5. The system according to claim 1, characterized in that: each pyrohydrolysis unit is provided with a blending tank (3), a buffer tank (5) and a plurality of pyrohydrolysis reaction tanks (4).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110407411A (en) * | 2019-08-01 | 2019-11-05 | 浙江天地环保科技有限公司 | A kind of livestock and poultry feces anaerobic digestion biogas slurry pyrohydrolysis reclaiming system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110407411A (en) * | 2019-08-01 | 2019-11-05 | 浙江天地环保科技有限公司 | A kind of livestock and poultry feces anaerobic digestion biogas slurry pyrohydrolysis reclaiming system and method |
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Address after: 310012 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Patentee after: Zhejiang Tiandi Environmental Protection Technology Co.,Ltd. Address before: 310012 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Patentee before: ZHEJIANG TIANDI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
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Address after: 310012 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Patentee after: Zhejiang Zheneng Technology Environmental Protection Group Co.,Ltd. Country or region after: China Address before: 310012 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Patentee before: Zhejiang Tiandi Environmental Protection Technology Co.,Ltd. Country or region before: China |
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