CN211056982U - Biogas slurry resource utilization system device - Google Patents
Biogas slurry resource utilization system device Download PDFInfo
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- CN211056982U CN211056982U CN201921370927.9U CN201921370927U CN211056982U CN 211056982 U CN211056982 U CN 211056982U CN 201921370927 U CN201921370927 U CN 201921370927U CN 211056982 U CN211056982 U CN 211056982U
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- 239000002002 slurry Substances 0.000 title claims abstract description 57
- 239000007788 liquid Substances 0.000 claims abstract description 128
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 44
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000012528 membrane Substances 0.000 claims abstract description 35
- 238000004140 cleaning Methods 0.000 claims abstract description 26
- 238000004064 recycling Methods 0.000 claims abstract description 25
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 23
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000001223 reverse osmosis Methods 0.000 claims description 47
- 238000000108 ultra-filtration Methods 0.000 claims description 30
- 239000003814 drug Substances 0.000 claims description 18
- 238000003860 storage Methods 0.000 claims description 16
- 238000005273 aeration Methods 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 238000011084 recovery Methods 0.000 claims description 7
- 229940079593 drug Drugs 0.000 claims description 4
- 239000000706 filtrate Substances 0.000 claims description 4
- 230000001546 nitrifying effect Effects 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims 3
- 239000000618 nitrogen fertilizer Substances 0.000 abstract description 22
- 239000003337 fertilizer Substances 0.000 abstract description 21
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 abstract description 9
- 238000005496 tempering Methods 0.000 abstract description 7
- 235000012055 fruits and vegetables Nutrition 0.000 abstract description 2
- 244000037666 field crops Species 0.000 abstract 1
- 238000000926 separation method Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 239000003513 alkali Substances 0.000 description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- 239000012466 permeate Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 239000012141 concentrate Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 235000015097 nutrients Nutrition 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000029087 digestion Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 244000144972 livestock Species 0.000 description 3
- 244000144977 poultry Species 0.000 description 3
- 238000009395 breeding Methods 0.000 description 2
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- 210000003608 fece Anatomy 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000010871 livestock manure Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 229930192334 Auxin Natural products 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000002363 auxin Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000004021 humic acid Substances 0.000 description 1
- SEOVTRFCIGRIMH-UHFFFAOYSA-N indole-3-acetic acid Chemical compound C1=CC=C2C(CC(=O)O)=CNC2=C1 SEOVTRFCIGRIMH-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005180 public health Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 235000013343 vitamin Nutrition 0.000 description 1
- 229940088594 vitamin Drugs 0.000 description 1
- 229930003231 vitamin Natural products 0.000 description 1
- 239000011782 vitamin Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A system device for recycling biogas slurry belongs to the technical field of biogas slurry recycling. The method comprises the following steps: the device comprises a nitrogen treatment unit, a pretreatment unit, a membrane concentration treatment unit and a clear liquid recycling unit. The biogas slurry is subjected to nitrogen treatment, pretreatment and membrane concentration treatment, the concentrated solution can be used for producing fertilizers, clear liquid is reused for a membrane cleaning system and a raw material pool for tempering, ammonium nitrogen is treated by the nitrogen to be prepared into 3 fertilizers of ammonium nitrogen fertilizer, ammonium nitrate fertilizer and nitrate nitrogen fertilizer, the method for selecting the nitrogen treatment according to local conditions is adopted, and the produced fertilizer can be suitable for paddy fields and dry lands, and can also be suitable for field crops and greenhouse fruits and vegetables. Partial or all nitrification treatment is adopted to remove partial macromolecular organic matters, so that subsequent membrane pollution is reduced, nitrate nitrogen is not easy to volatilize and lose, and the concentration multiple of the biogas slurry can be improved.
Description
Technical Field
The utility model belongs to the technical field of natural pond liquid resourceization, a natural pond liquid utilization's system and device specifically says so.
Background
With the rapid development of the livestock and poultry breeding industry in China, the problem of environmental pollution caused by a large amount of concentrated breeding waste is increasingly serious. The method for treating the livestock and poultry manure by adopting anaerobic digestion is an effective treatment and utilization method, realizes the harmless treatment of the livestock and poultry manure, can generate a large amount of biogas, contains a large amount of nutrient elements such as nitrogen, phosphorus and potassium, humic acid, auxin, vitamins, active enzyme and other substances in biogas residues and biogas slurry, and can be applied to farmlands as soil conditioners and fertilizers.
However, the large and medium-sized biogas projects in China mainly adopt a wet anaerobic digestion technology, the amount of biogas slurry generated is large, sufficient farmland consumption is not available around the biogas projects, and the biogas is directly discharged to pollute the environment and endanger the health of public health. The original biogas slurry has large volume, more impurities, lower concentration of nutrient substances and higher long-distance transportation cost, and is not beneficial to the commercialization and the commercialization of the biogas slurry. Therefore, the combined membrane technologies of ultrafiltration, nanofiltration, reverse osmosis and the like are adopted to treat the biogas slurry, so that the biogas slurry is concentrated, the storage and the transportation are convenient, and the resource utilization of the biogas slurry is promoted.
The membrane technology is utilized to treat the biogas slurry, the concentrated solution is prepared into liquid fertilizer, and the clear liquid is recycled or discharged after reaching the standard, so that the recycling of the biogas slurry is realized. The inventor of the related art has studied the biogas slurry concentration by using a combined membrane technology, for example, the Qinghua university discloses a mobile biogas slurry concentration integrated device (application number: CN201310571680.8), for example, the Huazhong agricultural university discloses a biogas slurry reduction treatment and biogas synergistic purification system and purification method (application number: CN201510407545.9), and the applicant mainly concentrates the raw biogas slurry to produce single-nitrogen ammonium nitrogen fertilizer, but the single-nitrogen ammonium nitrogen fertilizer has the following defects: ammonium nitrogen in the biogas slurry volatilizes and loses after being concentrated to a certain multiple, the ammonium nitrogen fertilizer is mainly applied to the paddy field and is not suitable for dry land, and the ammonium nitrogen fertilizer is easy to cause ammonium poisoning of greenhouse vegetables. The realization of the resource utilization of biogas slurry by using biogas slurry as a raw material to concentrate and manufacture multi-element nitrogen fertilizers (ammonium nitrogen fertilizer, nitrate nitrogen fertilizer and ammonium nitrate fertilizer) has not been reported yet.
SUMMERY OF THE UTILITY MODEL
To the concentrated problem of making single ammonium nitrogen fertilizer of present natural pond liquid, this application provides a natural pond liquid utilization's system's device, can concentrate and make ammonium nitrogen fertilizer, nitrate nitrogen fertilizer, ammonium nitrate fertilizer, the clear solution of system can be used for membrane washing and raw materials water distribution.
In order to achieve the purpose, the technical scheme of the application is as follows: a system device for biogas slurry resource utilization comprises: the device comprises a nitrogen treatment unit, a pretreatment unit, a membrane concentration treatment unit and a clear liquid recycling unit;
the method specifically comprises the following steps: a biogas liquid pool (1), a nitrification pool (2), a bedroom centrifuge (3), a security filter (4), an ultrafiltration filter (5), a reverse osmosis liquid storage tank (6), a reverse osmosis filter (7), a medicament recovery tank (8), a concentrated liquid tank (9), a clear liquid tank (10) and a dispensing tank (11);
the biogas liquid pool (1) is provided with a first ammonium nitrogen online monitor (1-1) and a first online liquid level meter (1-2); the biogas liquid pool (1) is in pipeline connection with the nitrification pool (2) through a first feeding pump (2-1) and a first on-line liquid flow meter (2-3), and meanwhile, the biogas liquid pool (1) is in pipeline connection with the bedroom centrifuge (3) through a second feeding pump (2-2) and a second on-line liquid flow meter (2-4); the upper part of the nitrification tank (2) is provided with a second online liquid level meter (2-5), a dissolved oxygen online monitor (2-6), a second ammonium nitrogen online monitor (2-7), a first nitrate nitrogen online monitor (2-8) and a temperature online monitor (2-9), the bottom surface in the nitrification tank (2) is provided with a microporous aeration pipe (2-11), and the microporous aeration pipe (2-11) is connected with an external air blower (2-10); a nitrified liquid outlet of the nitrifying tank (2) is connected with a bedroom centrifuge (3) through a third feeding pump (3-1); a filtered liquid outlet of the bedroom centrifuge (3) is connected with the security filter (4) through a fourth feeding pump (4-1) and a first electromagnetic valve (4-2); a filtered liquid outlet of the security filter (4) is connected with the upper part of the ultrafiltration filter (5) through a fifth feeding pump (5-1), and the intercepted filtrate of the security filter (4) is connected with an inlet of the bedroom centrifuge (3) through a second electromagnetic valve (4-3); the lower part of the ultrafiltration filter (5) is filtered out, the outlet of the liquid is connected with the inlet at the upper part of the reverse osmosis filter (7) through a sixth electromagnetic valve (5-4) and a sixth feed pump (7-1), and the interception filtrate of the ultrafiltration filter (5) is connected with the inlet of the bedroom centrifuge (3) through a fifth electromagnetic valve (5-3); a clear liquid outlet at the lower part of the reverse osmosis filter (7) is connected with a clear liquid tank (10) through an eleventh electromagnetic valve (7-5); the concentrated solution of the reverse osmosis filter (7) is connected with a reverse osmosis liquid storage tank (6) through a ninth electromagnetic valve (7-3), the outlet of the reverse osmosis liquid storage tank (6) is also connected with the reverse osmosis filter (7) through a seventh electromagnetic valve (6-1) and a sixth feed pump (7-1) to form a circulation loop, and meanwhile, the concentrated solution outlet of the reverse osmosis filter (7) is connected with a concentrated solution tank (9) through a tenth electromagnetic valve (7-4);
the clear liquid tank (10) is discharged through a first discharge pump (10-1), or is connected with a dispensing tank (11) through the first discharge pump (10-1), the dispensing tank (11) is connected with a second discharge pump (11-1), and the second discharge pump (11-1) is respectively connected with a security filter (4) through a first electromagnetic valve (4-2), an ultrafiltration filter (5) through a sixth electromagnetic valve (5-4), and a reverse osmosis filter (7) through an eleventh electromagnetic valve (7-5); meanwhile, the third electromagnetic valve (4-4), the fourth electromagnetic valve (5-2) and the eighth electromagnetic valve (7-2) are respectively connected with the medicament recovery tank (8); the above is a recycling process of cleaning clear liquid, and the dispensing tank (11) is used for adding medicines and preparing cleaning liquid medicine.
The reverse osmosis liquid storage tank (6) is provided with a third ammonium nitrogen on-line monitor (6-2) and a second nitrate nitrogen on-line monitor (6-3).
Nitrogen treatment: the biogas slurry discharged by the anaerobic digestion tank is firstly precipitated in a biogas slurry pool, the effluent of the biogas slurry pool can enter a centrifuge for solid-liquid separation to produce ammonium nitrogen fertilizer, and can also enter a nitrification pool for aerobic nitrification to enter the centrifuge for solid-liquid separation to produce nitrate nitrogen fertilizer and ammonium nitrate fertilizer.
A pretreatment unit: the nitrogen-treated biogas slurry is subjected to solid-liquid separation in a centrifuge, and the centrifuged biogas slurry is pretreated by a cartridge filter.
A membrane concentration unit: the pretreated biogas slurry is sequentially treated by an ultrafiltration membrane system and a reverse osmosis membrane system, wherein the biogas slurry treated by the reverse osmosis membrane system can flow back to a reverse osmosis liquid storage tank to improve the concentration multiple of the biogas slurry.
A clear liquid recycling unit: the clear liquid of the reverse osmosis system can be used as water for a membrane cleaning system and can also flow back to the raw material pool for tempering, so that the aim of recycling the clear liquid is fulfilled.
The nitrogen treatment step comprises the following three treatment routes of A, directly pumping all biogas slurry into a centrifuge by a feed pump to perform solid-liquid separation, B, pumping all biogas slurry into a nitrification tank by the feed pump to perform aerobic nitrification, converting all ammonium nitrogen into nitrate nitrogen, aerating the biogas slurry in the nitrification tank by an air blower through a microporous aeration pipe, setting an online gas flow meter to monitor the flow in real time, and conveniently controlling the aeration amount, setting an online liquid level meter, a dissolved oxygen online monitor, an ammonium nitrogen online monitor, a nitrate nitrogen online monitor and a temperature online monitor in the biogas slurry tank to conveniently control the aerobic nitrification condition, feeding the biogas slurry of C.1/2-1/3 into the nitrification tank by the feed pump to perform nitrification, directly using the feed pump to set the online gas flow meter to monitor the flow in real time, conveniently controlling the aeration amount, setting an online liquid level meter, a dissolved oxygen online monitor, an ammonium nitrogen online monitor, an online temperature online monitor, controlling the aerobic aeration amount, setting an online liquid level meter, an online dissolved oxygen online monitor, an online nitrogen online monitor, an online liquid level meter, an aerobic nitrification temperature and an online liquid level meter to control range of L-25 mg of the nitrification tank.
The pretreatment step comprises the following steps: the biogas slurry treated by the nitrogen enters a centrifuge for solid-liquid separation, and is pumped into a cartridge filter by a feed pump for pretreatment of biogas slurry concentration, so that severe membrane pollution of a subsequent membrane concentration unit is prevented. The security filter is provided with an electromagnetic valve, an electromagnetic valve and an electromagnetic valve. The cartridge filter is a core type filter, the aperture is 10-30um, and the filter core is replaced when the pressure difference between the inlet and the outlet of the filter reaches 0.2 MPa.
The membrane concentration step: the biogas slurry is firstly sent to an ultrafiltration filter by a feed pump, ultrafiltration cut-off liquid flows back to a centrifuge or a discharge system by an electromagnetic valve, ultrafiltration permeate liquid is pumped into a reverse osmosis filter by the feed pump, reverse osmosis concentrated liquid can flow back to a reverse osmosis liquid storage tank by the electromagnetic valve to be concentrated again to improve the concentration multiple, and the concentrated liquid reaching the concentration multiple is discharged into a concentrated liquid tank. The ultrafiltration system adopts a tubular ultrafiltration membrane component with the aperture of 5-100 nm. The reverse osmosis system adopts a disc tube type reverse osmosis component with the aperture of 0.8-1 nm. The concentrated solution of the reverse osmosis system is subjected to nutrient blending, and 3 different fertilizers including ammonium nitrogen fertilizer, nitrate nitrogen fertilizer and ammonium nitrate fertilizer can be produced by different nitrogen treatment methods. The biogas slurry can be concentrated to 5 times, the ammonium nitrate fertilizer to 8 times and the nitrate nitrogen fertilizer to 10 times by membrane concentration of the ammonium nitrogen fertilizer.
The clear liquid recycling step: the ultrafiltration permeate enters a clear liquid tank for storage, clear liquid can be used as dispensing water of a medicine adding tank, cleaning liquid medicine is pumped into a cartridge filter, an ultrafiltration filter and a reverse osmosis filter through a cleaning pump, the cleaning liquid medicine is gathered into a medicine recovery tank, clear liquid can be adopted for cleaning at the initial stage of pollution, chemical cleaning is adopted when the membrane pressure difference rises or the permeate flow is reduced by 15%, the chemical cleaning mainly comprises alkali (sodium hydroxide) cleaning and acid (citric acid) cleaning, the alkali cleaning refers to that the pH range of alkali liquor is 11-12, and the pH of acid liquor is 2.5-3.5 during acid cleaning. The clear liquid can be directly reused for raw material pool tempering. And the clear liquid recycling unit returns clear liquid to the raw material pool for tempering and recycling for membrane cleaning, and the clear liquid recycling rate is over 80 percent.
The utility model discloses owing to adopt above technical scheme, natural pond liquid is through nitrogen processing, preliminary treatment, membrane concentration, and fertilizer can be produced to the concentrate, and the clear liquid is recycled to membrane cleaning system and raw materials pond quenching and tempering, and this system and device have following advantage: (1) the ammonium nitrogen is treated by nitrogen to produce 3 kinds of fertilizers, ammonium nitrate fertilizer and nitrate nitrogen fertilizer, and the produced fertilizer is suitable for paddy field and dry land, field crop and greenhouse fruit and vegetable. (2) Partial or all nitrification treatment is adopted to remove partial macromolecular organic matters, so that subsequent membrane pollution is reduced, nitrate nitrogen is not easy to volatilize and lose, the concentration multiple of biogas slurry can be improved, and the transportation cost of the fertilizer is reduced. (3) The system and the device can realize the purpose of recycling biogas slurry, are simple and easy to implement, are green and environment-friendly, and are convenient to operate and manage.
Drawings
Fig. 1 is a flow chart of the present invention.
Fig. 2 is a schematic view of the structure of the device of the present invention.
In fig. 2: 1. the system comprises a biogas liquid pool, 1-1, a first ammonium nitrogen online monitor and 1-2 first online liquid level meters; 2. 2-1 parts of a nitrification tank, 2-2 parts of a first feeding pump, 2-3 parts of a second feeding pump, 2-4 parts of a first online liquid flow meter, 2-5 parts of a second online liquid flow meter, 2-6 parts of a second online liquid level meter, 2-7 parts of a dissolved oxygen online monitor, 2-8 parts of a second ammonium nitrogen online monitor, 2-9 parts of a first nitrate nitrogen online monitor, 2-10 parts of a temperature online monitor, 2-11 parts of a blower, a microporous aeration pipe and 2-12 parts of a gas flow meter; 3. a bedroom centrifuge, 3-1, a third feed pump; 4. a cartridge filter 4-1, a fourth feeding pump 4-2, a first electromagnetic valve 4-3, a second electromagnetic valve 4-4 and a third electromagnetic valve; 5. 5-1 parts of an ultrafiltration filter, 5-2 parts of a fifth feeding pump, 5-3 parts of a fourth electromagnetic valve, 5-4 parts of a fifth electromagnetic valve and a sixth electromagnetic valve; 6. a reverse osmosis liquid storage tank, 6-1, a seventh electromagnetic valve, 6-2, a third ammonium nitrogen online monitor, 6-3 and a second nitrate nitrogen online monitor; 7. the system comprises a reverse osmosis filter, 7-1 parts of a sixth feeding pump, 7-2 parts of an eighth electromagnetic valve, 7-3 parts of a ninth electromagnetic valve, 7-4 parts of a tenth electromagnetic valve, 7-5 parts of an eleventh electromagnetic valve; 8. a drug recovery tank; 9. a concentrated liquid tank; 10. a clear liquid tank 10-1 and a first discharge pump; 11. a dispensing tank, 11-1 and a second discharge pump.
Detailed Description
The principles and features of the present invention are described in further detail below with reference to the accompanying drawings and specific embodiments.
The embodiment provides a system and a device for recycling biogas slurry, which are sequentially provided with a nitrogen treatment unit, a pretreatment unit, a membrane concentration treatment unit, a clear liquid recycling unit and a blending unit, A. the nitrogen treatment unit is sequentially provided with a biogas liquid pool 1, a first ammonium nitrogen online monitor 1-1, a first online liquid level meter 1-2, a nitrification pool 2, a first feeding pump 2-1, a second feeding pump 2-2, a first online liquid flow meter 2-3, a second online liquid flow meter 2-4, a second online liquid level meter 2-5, a dissolved oxygen online monitor 2-6, a second ammonium nitrogen online monitor 2-7, a first nitrate nitrogen online monitor 2-8, a temperature online monitor 2-9, a blower 2-10, a microporous aeration pipe 2-11 and a gas flow meter 2-12; B. the pretreatment unit is sequentially provided with a bedroom centrifuge 3, a third feeding pump 3-1, a 4 security filter, a fourth feeding pump 4-1, a first electromagnetic valve 4-2, a second electromagnetic valve 4-3 and a third electromagnetic valve 4-4; C. the membrane concentration treatment unit is sequentially provided with an ultrafiltration filter 5, a fifth feed pump 5-1, a fourth electromagnetic valve 5-2, a fifth electromagnetic valve 5-3, a sixth electromagnetic valve 5-4, a reverse osmosis liquid storage tank 6, a seventh electromagnetic valve 6-1, a third ammonium nitrogen online monitor 6-2, a second nitrate nitrogen online monitor 6-3, a reverse osmosis filter 7, a sixth feed pump 7-1, an eighth electromagnetic valve 7-2, a ninth electromagnetic valve 7-3, a tenth electromagnetic valve 7-4 and an eleventh electromagnetic valve 7-5; D. the clear liquid recycling unit is sequentially provided with a medicament recycling tank 8, a concentrated liquid tank 9, a clear liquid tank 10, a first discharging pump 10-1, a dispensing tank 11 and a second discharging pump 11-1; E. the blending unit is provided with a concentrated liquid tank 9.
For ease of understanding, the present invention will be further described with reference to fig. 2 and the following detailed description.
The nitrogen treatment step comprises the steps that the biogas slurry is subjected to gravity precipitation in a biogas slurry pool 1 to remove impurities increased in particles, a first ammonium nitrogen online monitor 1-1 and a first online liquid level meter 1-2 are used for monitoring in real time, the biogas slurry is subjected to precipitation treatment, and then the three treatment routes are provided, namely, A, all the biogas slurry is directly pumped into a centrifuge 3 by a second feed pump 2-2 to perform solid-liquid separation, B, all the biogas slurry is pumped into a nitrification pool 2 by a first feed pump 2-1 to perform aerobic nitrification, all the ammonium nitrogen is converted into nitrate nitrogen, an air blower 2-10 aerates the biogas slurry in the nitrification pool through a microporous aeration pipe 2-11, an online gas flow meter 2-12 is arranged to monitor the flow in real time, and conveniently control the aeration amount, a second online liquid level meter 2-5, a dissolved oxygen online monitor 2-6, a second ammonium nitrogen online monitor 2-7, a first ammonium nitrogen online monitor 2-8 and a temperature online monitor 2-9 are arranged in the biogas slurry pool, the aerobic control of the nitrification condition, the nitrification is carried out by the first online liquid level meter 2-1, the nitrification pool 2-1, the dissolved oxygen online monitor 2-7, the aerobic nitrification flow meter is arranged in the nitrification pool, the nitrification pool 2-2, the aerobic nitrification flow meter is arranged in the nitrification pool, the aerobic nitrification pool 2-2 online monitor, the aerobic condition is directly controlled by the aerobic nitrification flow meter, the aerobic condition is controlled by the aerobic condition, the aerobic condition of the aerobic nitrification flow meter 2-6, the aerobic.
A pretreatment step: the biogas slurry treated by the nitrogen enters a centrifuge 3 for solid-liquid separation, and is pumped into a cartridge filter 4 by a fourth feed pump 4-1 for pretreatment of biogas membrane concentration, so that severe membrane pollution of a subsequent concentration unit is prevented. The cartridge filter 4 is provided with a first electromagnetic valve 4-2, a second electromagnetic valve 4-3 and a third electromagnetic valve 4-4. The cartridge filter is a core type filter, the aperture is 10-30um, and the filter core is replaced when the pressure difference between the inlet and the outlet of the filter reaches 0.2 MPa.
And (3) membrane concentration step: the biogas slurry is pumped into an ultrafiltration filter 5 by a fifth feed pump 5-1, ultrafiltration cut-off liquid flows back to a centrifuge 3 or a discharge system by a fifth electromagnetic valve 5-3, ultrafiltration permeate liquid is pumped into a reverse osmosis filter 7 by a sixth feed pump 7-1, reverse osmosis concentrated liquid can flow back to a reverse osmosis liquid storage tank 6 by a ninth electromagnetic valve 7-3 to be concentrated again to improve the concentration multiple, and the concentrated liquid reaching the concentration multiple is discharged into a concentrated liquid tank 9. The ultrafiltration system adopts a tubular ultrafiltration membrane component with the aperture of 5-100 nm. The reverse osmosis system adopts a disc tube type reverse osmosis component with the aperture of 0.8-1 nm. The concentrated solution of the reverse osmosis system is subjected to nutrient blending, and 3 different fertilizers including ammonium nitrogen fertilizer, nitrate nitrogen fertilizer and ammonium nitrate fertilizer can be produced by different nitrogen treatment methods. The biogas slurry can be concentrated to 5 times, the ammonium nitrate fertilizer to 8 times and the nitrate nitrogen fertilizer to 10 times by membrane concentration of the ammonium nitrogen fertilizer.
And (3) clear liquid recycling step: the ultrafiltration permeate enters a clear liquid tank 10 for storage, clear liquid can be used as dispensing water of a medicine adding tank 11, cleaning liquid medicine is pumped into a cartridge filter 4, an ultrafiltration filter 5 and a reverse osmosis filter 7 through a second discharging pump 11-1, the cleaned liquid medicine is converged into a medicine recovery tank 8, clear liquid can be adopted for cleaning at the initial pollution stage, chemical cleaning is adopted when the membrane pressure difference rises or the permeate flow is reduced by 15%, the chemical cleaning mainly comprises alkali (sodium hydroxide) cleaning and acid (citric acid) cleaning, the alkali cleaning is that the pH range of alkali liquor is 11-12, and the pH of acid liquor is 2.5-3.5 during acid cleaning. The clear liquid can be directly reused for raw material pool tempering. And the clear liquid recycling unit returns clear liquid to the raw material pool for tempering and recycling for membrane cleaning, and the clear liquid recycling rate is over 80 percent.
The above, only for the utility model discloses create the concrete implementation way of preferred, nevertheless the utility model discloses the protection scope of creation is not limited to this, and any person skilled in this technical field is in the utility model discloses create the technical scope of disclosure, according to the utility model discloses the technical scheme of creation and utility model design equivalence replacement or change all should be covered in the protection scope of creation of the utility model.
Claims (5)
1. The utility model provides a natural pond liquid utilization's system's device which characterized in that includes: the device comprises a nitrogen treatment unit, a pretreatment unit, a membrane concentration treatment unit and a clear liquid recycling unit;
the method specifically comprises the following steps: a biogas liquid pool (1), a nitrification pool (2), a bedroom centrifuge (3), a security filter (4), an ultrafiltration filter (5), a reverse osmosis liquid storage tank (6), a reverse osmosis filter (7), a medicament recovery tank (8), a concentrated liquid tank (9), a clear liquid tank (10) and a dispensing tank (11);
the biogas liquid pool (1) is provided with a first ammonium nitrogen online monitor (1-1) and a first online liquid level meter (1-2); the biogas liquid pool (1) is in pipeline connection with the nitrification pool (2) through a first feeding pump (2-1) and a first on-line liquid flow meter (2-3), and meanwhile, the biogas liquid pool (1) is in pipeline connection with the bedroom centrifuge (3) through a second feeding pump (2-2) and a second on-line liquid flow meter (2-4); the upper part of the nitrification tank (2) is provided with a second online liquid level meter (2-5), a dissolved oxygen online monitor (2-6), a second ammonium nitrogen online monitor (2-7), a first nitrate nitrogen online monitor (2-8) and a temperature online monitor (2-9), the bottom surface in the nitrification tank (2) is provided with a microporous aeration pipe (2-11), and the microporous aeration pipe (2-11) is connected with an external air blower (2-10); a nitrified liquid outlet of the nitrifying tank (2) is connected with a bedroom centrifuge (3) through a third feeding pump (3-1); a filtered liquid outlet of the bedroom centrifuge (3) is connected with the security filter (4) through a fourth feeding pump (4-1) and a first electromagnetic valve (4-2); a filtered liquid outlet of the security filter (4) is connected with the upper part of the ultrafiltration filter (5) through a fifth feeding pump (5-1), and the intercepted filtrate of the security filter (4) is connected with an inlet of the bedroom centrifuge (3) through a second electromagnetic valve (4-3); the lower part of the ultrafiltration filter (5) is filtered out, the outlet of the liquid is connected with the inlet at the upper part of the reverse osmosis filter (7) through a sixth electromagnetic valve (5-4) and a sixth feed pump (7-1), and the interception filtrate of the ultrafiltration filter (5) is connected with the inlet of the bedroom centrifuge (3) through a fifth electromagnetic valve (5-3); a clear liquid outlet at the lower part of the reverse osmosis filter (7) is connected with a clear liquid tank (10) through an eleventh electromagnetic valve (7-5); the concentrated solution of the reverse osmosis filter (7) is connected with a reverse osmosis liquid storage tank (6) through a ninth electromagnetic valve (7-3), the outlet of the reverse osmosis liquid storage tank (6) is also connected with the reverse osmosis filter (7) through a seventh electromagnetic valve (6-1) and a sixth feed pump (7-1) to form a circulation loop, and meanwhile, the concentrated solution outlet of the reverse osmosis filter (7) is connected with a concentrated solution tank (9) through a tenth electromagnetic valve (7-4);
the clear liquid tank (10) is discharged through a first discharge pump (10-1), or is connected with a dispensing tank (11) through the first discharge pump (10-1), the dispensing tank (11) is connected with a second discharge pump (11-1), and the second discharge pump (11-1) is respectively connected with a security filter (4) through a first electromagnetic valve (4-2), an ultrafiltration filter (5) through a sixth electromagnetic valve (5-4), and a reverse osmosis filter (7) through an eleventh electromagnetic valve (7-5); meanwhile, the third electromagnetic valve (4-4), the fourth electromagnetic valve (5-2) and the eighth electromagnetic valve (7-2) are respectively connected with the medicament recovery tank (8); the dispensing tank (11) is used for adding medicines and dispensing cleaning liquid medicines.
2. The system device for biogas slurry resource utilization according to claim 1, wherein the reverse osmosis liquid storage tank (6) is provided with a third ammonium nitrogen on-line monitor (6-2) and a second nitrate nitrogen on-line monitor (6-3).
3. The system device for recycling biogas slurry as claimed in claim 1, wherein the cartridge filter is a cartridge filter with a pore size of 10-30um, and the cartridge filter is replaced when the pressure difference between the inlet and the outlet of the filter reaches 0.2 MPa.
4. The system device for recycling biogas slurry as claimed in claim 1, wherein the ultrafiltration system adopts a tubular ultrafiltration membrane component with a pore size of 5-100 nm.
5. The system device for recycling biogas slurry as claimed in claim 1, wherein the reverse osmosis filter (7) is a disc tube type reverse osmosis module with a pore size of 0.8-1 nm.
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| CN201921370927.9U CN211056982U (en) | 2019-08-22 | 2019-08-22 | Biogas slurry resource utilization system device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113321560A (en) * | 2021-06-01 | 2021-08-31 | 仲恺农业工程学院 | Method and device for producing efficient organic liquid fertilizer by utilizing biogas slurry |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113321560A (en) * | 2021-06-01 | 2021-08-31 | 仲恺农业工程学院 | Method and device for producing efficient organic liquid fertilizer by utilizing biogas slurry |
| CN113321560B (en) * | 2021-06-01 | 2022-11-08 | 仲恺农业工程学院 | A method and device for producing high-efficiency organic liquid fertilizer using biogas slurry |
| WO2022253359A1 (en) * | 2021-06-01 | 2022-12-08 | 仲恺农业工程学院 | Method for producing high-efficiency organic liquid fertilizer by using biogas slurry and apparatus therefor |
| GB2611696A (en) * | 2021-06-01 | 2023-04-12 | Univ Zhongkai Agri & Eng | Method for producing high-efficiency organic liquid fertilizer by using biogas slurry and apparatus therefor |
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