CN107117782B - Zero-pollution emission treatment system and method for livestock and poultry breeding industry - Google Patents
Zero-pollution emission treatment system and method for livestock and poultry breeding industry Download PDFInfo
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- CN107117782B CN107117782B CN201710529871.6A CN201710529871A CN107117782B CN 107117782 B CN107117782 B CN 107117782B CN 201710529871 A CN201710529871 A CN 201710529871A CN 107117782 B CN107117782 B CN 107117782B
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- 244000144972 livestock Species 0.000 title claims abstract description 65
- 244000144977 poultry Species 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000009395 breeding Methods 0.000 title abstract description 9
- 230000001488 breeding effect Effects 0.000 title abstract description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 108
- 238000000926 separation method Methods 0.000 claims abstract description 70
- 238000001035 drying Methods 0.000 claims abstract description 43
- 238000003825 pressing Methods 0.000 claims abstract description 40
- 238000003763 carbonization Methods 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims description 67
- 239000000463 material Substances 0.000 claims description 54
- 239000007790 solid phase Substances 0.000 claims description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 239000006004 Quartz sand Substances 0.000 claims description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 30
- 239000007791 liquid phase Substances 0.000 claims description 29
- 238000004062 sedimentation Methods 0.000 claims description 23
- 239000000126 substance Substances 0.000 claims description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 21
- 238000011010 flushing procedure Methods 0.000 claims description 17
- 239000010871 livestock manure Substances 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 11
- 210000003608 fece Anatomy 0.000 claims description 10
- 239000008394 flocculating agent Substances 0.000 claims description 10
- 238000005189 flocculation Methods 0.000 claims description 10
- 230000016615 flocculation Effects 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000000855 fermentation Methods 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 239000003344 environmental pollutant Substances 0.000 claims description 7
- 231100000719 pollutant Toxicity 0.000 claims description 7
- 239000003337 fertilizer Substances 0.000 claims description 6
- 229910001385 heavy metal Inorganic materials 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 6
- 239000005539 carbonized material Substances 0.000 claims description 5
- 239000012629 purifying agent Substances 0.000 claims description 5
- 239000004449 solid propellant Substances 0.000 claims description 5
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 4
- 238000005469 granulation Methods 0.000 claims description 4
- 230000003179 granulation Effects 0.000 claims description 4
- 150000002505 iron Chemical class 0.000 claims description 4
- 239000010865 sewage Substances 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 208000028659 discharge Diseases 0.000 claims 15
- 238000007664 blowing Methods 0.000 claims 2
- 238000009304 pastoral farming Methods 0.000 claims 2
- 238000009374 poultry farming Methods 0.000 claims 2
- 239000002689 soil Substances 0.000 claims 1
- 238000005406 washing Methods 0.000 description 7
- 230000004151 fermentation Effects 0.000 description 5
- 239000003516 soil conditioner Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000011001 backwashing Methods 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
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- 241000607479 Yersinia pestis Species 0.000 description 1
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- MXZRMHIULZDAKC-UHFFFAOYSA-L ammonium magnesium phosphate Chemical compound [NH4+].[Mg+2].[O-]P([O-])([O-])=O MXZRMHIULZDAKC-UHFFFAOYSA-L 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 229910052567 struvite Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a treatment system and a method for zero-pollution emission in livestock and poultry breeding industry, which comprises a livestock and poultry house, a collecting pool, a methane tank, a concentration and separation device, a blow-off device, a filter pressing device, a high-pressure steam boiler, a drying device and a carbonization furnace which are sequentially arranged.
Description
Technical Field
The invention relates to the technical field of breeding environments, in particular to a zero-pollution emission treatment system and method for livestock and poultry breeding.
Background
The environmental problem of livestock and poultry breeding is a problem which is a hot concern of the masses at present, wherein the problem of treatment of breeding wastewater and livestock and poultry manure is two major problems which always plague farmers, wherein, as the culture scale is continuously enlarged, the production of feed residue and livestock and poultry manure in the culture process is also continuously enlarged, and most of the prior methods recover the feed residue and the livestock and poultry manure as biogas fermentation raw materials for treatment, for large-scale farms, because livestock and poultry houses need to be cleaned regularly, a large amount of waste water is generated, if the waste water is used as a biogas fermentation raw material alone, a huge biogas treatment tank is needed for completion, but also generates a large amount of production place cost investment, and is extremely inconvenient and economic, so that a diversified culture system is urgently needed to be matched with the ecological cycle treatment of large-scale livestock and poultry culture at present.
Disclosure of Invention
Aiming at the defects of the prior art, the technical purpose of the invention is to provide a treatment system and a treatment method for zero-pollution emission in livestock and poultry breeding industry, which are reliable in implementation, good in treatment effect, economical and effective.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
a treatment system for zero pollution discharge of livestock and poultry breeding industry comprises a livestock and poultry house, a collecting tank, a methane tank, a concentration separation device, a blow-off device, a filter pressing device, a high-pressure steam boiler, a drying device and a carbonization furnace which are arranged in sequence, wherein a drain outlet of the livestock and poultry house is connected with a feed inlet of the collecting tank through a pipeline, a discharge outlet of the collecting tank is connected with a feed inlet of the methane tank, feed liquid fermented by the methane tank is conveyed to the feed inlet of the concentration separation device through the discharge outlet of the methane tank and enters the concentration separation device through the pipeline, a liquid phase outlet of the concentration separation device is connected with the feed inlet of the blow-off device, a solid phase outlet of the concentration separation device is connected with the feed inlet of the filter pressing device, a solid phase outlet of the filter pressing device is connected with the feed inlet of the high-pressure steam boiler, and, the liquid phase outlet of the high-pressure steam boiler is connected with the feed inlet of the blowing-off device, the discharge port of the blowing-off device is connected with the flushing fluid inlet of the livestock and poultry house, the solid phase outlet of the high-pressure steam boiler is connected with the feed inlet of the drying device, and the discharge port of the drying device is connected with the feed inlet of the carbonization furnace.
Further, a discharge port of the collecting tank is provided with a solid-liquid separation device, the liquid-phase substances separated by the solid-liquid separation device are conveyed to a feed port of the methane tank from the discharge port of the collecting tank through a pipeline, and the solid-phase substances separated by the solid-liquid separation device are conveyed to a feed port of the drying device through a conveying device and enter the drying device.
Furthermore, a first-stage sedimentation tank is further arranged on a connecting pipeline between the methane tank and the concentration and separation device, a feed inlet of the first-stage sedimentation tank is connected with a discharge outlet of the methane tank, a discharge outlet of the first-stage sedimentation tank is connected with a feed inlet of the concentration and separation device, and a branch connected with the feed inlet of the first-stage sedimentation tank is further arranged on a pipeline connecting the collection tank and the methane tank.
Further, still be equipped with the second grade sedimentation tank between the solid phase export of concentration separator and filter pressing device's the feed inlet, the feed inlet of second grade sedimentation tank and concentration separator's solid phase exit linkage, the discharge gate of second grade sedimentation tank is connected with filter pressing device's feed inlet.
Furthermore, a quartz sand filter tower is arranged between the blow-off device and the livestock and poultry house, a water inlet of the quartz sand filter tower is connected with a discharge hole of the blow-off device, and a water outlet of the quartz sand filter tower is connected with a flushing fluid inlet of the livestock and poultry house.
Preferably, the same end of the quartz sand filter tower, which is positioned at the water inlet, is also provided with a back flush water outlet connected with a feed inlet pipeline of the carbonization furnace, the same end of the quartz sand filter tower, which is positioned at the water outlet, is provided with a back flush water inlet, and the back flush water inlet is connected with an external water supply pipeline.
Preferably, an activated carbon filter tower is further arranged between the air stripping device and the quartz sand filter tower, a water inlet of the activated carbon filter tower is connected with a discharge port of the air stripping device, and a water outlet of the activated carbon filter tower is connected with a water inlet of the quartz sand filter tower.
Further, drying device and carbide furnace between still be equipped with prilling granulator, prilling granulator's feed inlet and drying device's discharge gate are connected, prilling granulator's discharge gate and carbide furnace's feed inlet are connected.
A treatment method of a treatment system for zero pollutant discharge in livestock and poultry industry comprises the following steps:
(1) introducing flushing liquid into the livestock and poultry house to flush livestock and poultry manure and feed residues in the livestock and poultry house and conveying the livestock and poultry manure and the feed residues to a collection tank from a sewage discharge outlet of the livestock and poultry house through a pipeline, after the mixed liquid in the collection tank is subjected to preliminary solid-liquid separation, conveying a liquid-phase material to a feed inlet of a methane tank from a discharge outlet of the collection tank or directly outputting the liquid-phase material from a discharge outlet of the collection tank according to the capacity condition of the methane tank, then carrying out dosing flocculation treatment, then conveying the flocculated and precipitated material to a concentration separation device for solid-liquid separation, and conveying solid-phase substances with the water content of 60-70% in the mixed liquid subjected to preliminary solid-liquid separation in the collection tank to a drying device for drying;
(2) after anaerobic fermentation is carried out on liquid-phase materials entering a methane tank for 40-60 days at the temperature of 20-30 ℃, a flocculating agent is added into the methane liquid for flocculation reaction, so that suspended matters, phosphorus and heavy metal substances in the methane liquid are reacted and precipitated, and then the methane liquid and methane slag after flocculation reaction are conveyed to a concentration separation device for solid-liquid separation;
(3) supernatant obtained by separating materials entering the solid-liquid separation device is conveyed to a feed inlet of the air stripping device from a liquid phase outlet of the concentration separation device and enters the air stripping device, suspension and solid-phase materials in the concentration separation device are discharged from a solid phase outlet of the concentration separation device and are added with flocculating agent again for reaction, then the materials are conveyed to a filter pressing device for filter pressing, clear solution obtained by filter pressing of the filter pressing device is conveyed to the feed inlet of the air stripping device from the liquid phase outlet of the filter pressing device and enters the air stripping device, and solid-phase materials obtained by filter pressing of the filter pressing device are conveyed to the feed inlet of a high-pressure steam boiler from the solid phase outlet of the filter pressing device and enter a high-pressure steam boiler;
(4) after the high-pressure steam boiler processes the materials entering the high-pressure steam boiler for 20min according to the operation parameters of 0.5Mpa and 160-170 ℃, the generated high-pressure steam is conveyed to a feeding hole of the blowing-off device through a liquid-phase outlet at the upper end of the high-pressure steam boiler, and the solid-phase substances processed by the high-pressure steam boiler are conveyed to a feeding hole of the drying device through a solid-phase outlet at the lower part of the high-pressure steam boiler; after the material entering the stripping device is boiled at high temperature, the material in the stripping device is titrated by using an MAP method to remove ammonia nitrogen in the material, then the material is discharged from a discharge hole of the stripping device, and the treated solution is conveyed back to a flushing fluid inlet of a livestock and poultry house for recycling after being irradiated by an ultraviolet lamp, filtered by active carbon and filtered by quartz sand in sequence, wherein the back flushing fluid filtered by the quartz sand is conveyed to a feed hole of a carbonization furnace through a pipeline;
(5) after the materials entering the drying device are dried, the materials are conveyed to a granulating device from a discharge port of the drying device for granulation, then the materials are conveyed to a carbonization furnace for carbonization treatment at the temperature of 800 ℃, and finally the carbonized materials obtained by blanking can be used as a water purifying agent, a soil conditioner, a fertilizer or a solid fuel.
Further, the flocculating agent in the step (2) and the step (3) is inorganic aluminum salt or inorganic iron salt.
By adopting the technical scheme, the invention has the beneficial effects that: the livestock manure and the feed residues in the livestock house are washed, the livestock manure and the feed residues are conveyed to a collecting tank through a pipeline for preliminary collection, then the mixed liquid in the collecting tank is subjected to preliminary solid-liquid separation, part of waste residues with high solid content are conveyed to a drying device for drying, the other liquid-phase mixed liquid is conveyed to a methane tank for methane fermentation and utilization, the fermented methane liquid and the fermented methane residues are added with a flocculating agent for precipitation, so that most of suspended matters and heavy metal substances in the methane liquid and the methane residues are precipitated and treated into precipitates, part of clear mixed liquid is separated by a concentration and separation device, and high-temperature treatment is carried out by an air stripping device, so that microorganisms in the separated clear mixed liquid are killed, and the solution obtained after treatment is subjected to ultraviolet lamp irradiation treatment, activated carbon filtration and quartz sand filtration is conveyed back to a flushing liquid inlet of the livestock house for recycling, the washing cost of the livestock and poultry house is greatly reduced, in addition, the carbonized materials obtained after the solid-phase substances obtained by concentration and separation sequentially pass through the high-pressure steam oven, the drying device, the granulating device and the carbonization oven can be used as a water quality purifying agent, a soil conditioner, a fertilizer or a solid fuel, secondary economic value is created, all wastes in the livestock and poultry house culture process are recycled, and the aim of zero pollution emission is fulfilled.
Drawings
The invention will be further elucidated with reference to the drawings and the detailed description:
FIG. 1 is a schematic diagram of a processing system of the present invention.
Detailed Description
As shown in figure 1, the invention comprises a livestock and poultry house 1, a collection pool 2, a methane tank 3, a concentration and separation device 5, a blow-off device 9, a filter pressing device 7, a high-pressure steam boiler 8, a drying device 13 and a carbonization furnace 12 which are arranged in sequence, wherein a sewage discharge outlet of the livestock and poultry house 1 is connected with a feed inlet of the collection pool 2 through a pipeline, a discharge outlet of the collection pool 2 is connected with a feed inlet of the methane tank 3, feed liquid fermented by the methane tank 3 is conveyed to the feed inlet of the concentration and separation device 5 through a pipeline from the discharge outlet of the methane tank 3 and enters the concentration and separation device 5, a liquid phase outlet of the concentration and separation device is connected with the feed inlet of the blow-off device 9, a solid phase outlet of the concentration and separation device 5 is connected with the feed inlet of the filter pressing device 7, a solid phase outlet of the filter pressing device 7 is connected with the feed inlet of, the liquid phase outlet of the high pressure steam boiler 8 is connected with the feed inlet of the blowing-off device 9, the discharge port of the blowing-off device 9 is connected with the flushing fluid inlet of the livestock and poultry house 1, the solid phase outlet of the high pressure steam boiler 8 is connected with the feed inlet of the drying device 13, and the discharge port of the drying device 13 is connected with the feed inlet of the carbonization furnace 12.
In order to avoid excessive accumulation of precipitated solid-phase substances in the collecting tank 2 and to enable the precipitated solid-phase substances to be utilized as early as possible, a solid-liquid separation device 21 is further arranged on a discharge port of the collecting tank 2, the liquid-phase substances separated by the solid-liquid separation device 21 are conveyed from the discharge port of the collecting tank 2 to a feed port of the methane tank 3 through a pipeline, and the solid-phase substances separated by the solid-liquid separation device 21 are conveyed to a feed port of the drying device 13 through a conveying device and enter the drying device 13.
In order to separate heavy metal substances and suspended matters in the biogas slurry after biogas fermentation, further, a first-stage sedimentation tank 4 is arranged on a connecting pipeline between the biogas digester 3 and a concentration separation device 5, a feed inlet of the first-stage sedimentation tank 4 is connected with a discharge outlet of the biogas digester 3, a discharge outlet of the first-stage sedimentation tank 4 is connected with a feed inlet of the concentration separation device 5, in addition, a branch connected with a feed inlet of the first-stage sedimentation tank 4 is also arranged on a pipeline connecting the collection tank 2 and the biogas digester 3, an operator can selectively close the feed inlet of the biogas digester 3 according to needs to ensure that flushing liquid of the collection tank 2 directly enters the first-stage sedimentation tank 4 for dosing and flocculation, and the branch connected with the feed inlet of the first-stage sedimentation tank 4 on the pipeline connecting the collection tank 2 and the biogas digester 3 can also be closed according to the condition of the biogas digester 3, so that the livestock and poultry manure, the feed residues and the flushing liquid in the collecting tank 2 are sent into the methane tank 3.
Further, still be equipped with second grade sedimentation tank 6 between the solid phase export of separation by concentration device 5 and the feed inlet of filter pressing device 7, the feed inlet of second grade sedimentation tank 6 and separation by concentration device 5's solid phase exit linkage, the discharge gate of second grade sedimentation tank 6 is connected with the feed inlet of filter pressing device 7.
In order to make the clear solution after the air stripping treatment be reused as the washing liquid more safely and reliably, further, a quartz sand filter tower 11 is further arranged between the air stripping device 9 and the livestock and poultry house 1, a water inlet of the quartz sand filter tower 11 is connected with a discharge hole of the air stripping device 9, a water outlet of the quartz sand filter tower 11 is connected with a washing liquid inlet of the livestock and poultry house 1, after the quartz sand filter tower 11 is filtered for a period of time, partial precipitates or filtered large granular substances are accumulated and pressed in the quartz sand filter tower 11, for the convenience of washing and washing liquid recycling, preferably, a back washing water outlet (not shown) connected with a feed inlet pipeline of the carbonization furnace 12 is further arranged at the same end of the water inlet of the quartz sand filter tower 11, a back washing water inlet is arranged at the same end of the water outlet, and the back washing water inlet is connected with an external water supply pipeline, .
As another additional preferable scheme of this embodiment, an activated carbon filter tower 10 is further disposed between the air stripping device 9 and the quartz sand filter tower 11, a water inlet of the activated carbon filter tower 10 is connected with a material outlet of the air stripping device 9, and a water outlet of the activated carbon filter tower 10 is connected with a water inlet of the quartz sand filter tower 11.
Further, drying device 13 and carbide furnace 12 between still be equipped with prilling granulator 14, prilling granulator 14's feed inlet is connected with drying device 13's discharge gate, and prilling granulator 14's discharge gate is connected with carbide furnace 12's feed inlet, can make things convenient for carbide furnace 12's carbonization through the solid phase material after the granulation.
A treatment method of a treatment system for zero pollutant discharge in livestock and poultry industry comprises the following steps:
(1) introducing flushing liquid into the livestock and poultry house 1 to flush livestock and poultry manure and feed residues in the livestock and poultry house 1 and conveying the livestock and poultry manure and the feed residues from a drain outlet of the livestock and poultry house 1 to a collection tank 2 through a pipeline, after primary solid-liquid separation is carried out on mixed liquid in the collection tank 2, conveying liquid-phase materials to a feed inlet of a methane tank 3 from a discharge outlet of the collection tank 2 or directly outputting the liquid-phase materials from a discharge outlet of the collection tank 2 according to the capacity condition of the methane tank 3, then carrying out dosing flocculation treatment, then conveying the flocculated and precipitated materials to a concentration separation device 5 for solid-liquid separation, and conveying solid-phase substances with the water content of 60-70% in the mixed liquid after the primary solid-liquid separation in the collection tank to a drying device 13 for drying;
(2) after anaerobic fermentation is carried out on liquid-phase materials entering a methane tank 3 for 40-60 days at the temperature of 20-30 ℃, a flocculating agent is added into the methane liquid for flocculation reaction, suspended matters, phosphorus and heavy metal substances in the methane liquid are reacted and precipitated, and then the methane liquid and the methane slag after the flocculation reaction are conveyed to a concentration separation device 5 for solid-liquid separation, wherein the flocculating agent can be inorganic aluminum salt or inorganic iron salt;
(3) supernatant obtained by separating materials entering the solid-liquid separation device 5 is conveyed to a feed inlet of the air stripping device 9 from a liquid phase outlet of the concentration separation device 5 and enters the air stripping device 9, suspension and solid-phase materials in the concentration separation device 5 are discharged from a solid phase outlet of the concentration separation device 5 and are added with flocculant again for reaction, then the materials are conveyed to a filter pressing device 7 for filter pressing, clear solution obtained by filter pressing of the filter pressing device 7 is conveyed to the feed inlet of the air stripping device 9 from the liquid phase outlet of the filter pressing device 7 and enters the air stripping device 9, and solid-phase materials obtained by filter pressing of the filter pressing device are conveyed to a feed inlet of a high-pressure steam boiler 8 from the solid phase outlet of the filter pressing device and enter the high-pressure steam boiler 8, wherein the flocculant can be inorganic aluminum salt or inorganic iron salt;
(4) after the high-pressure steam boiler 8 processes the materials entering the high-pressure steam boiler 8 for 20min according to the operation parameters of 0.5Mpa and 160-170 ℃, the generated high-pressure steam is conveyed to the feeding hole of the blowing-off device 9 through a liquid phase outlet at the upper end of the high-pressure steam boiler 8, and the solid phase substances processed by the high-pressure steam boiler 8 are conveyed to the feeding hole of the drying device 13 through a solid phase outlet at the lower part of the high-pressure steam boiler 8; after the material entering the stripping device 9 is boiled at a high temperature, the material in the stripping device 9 is titrated by using an MAP method to remove ammonia nitrogen in the material, then the material is discharged from a discharge hole of the stripping device 13, and the solution obtained by treatment can be conveyed back to a flushing fluid inlet of the livestock and poultry house 1 for recycling after being irradiated by an ultraviolet lamp, filtered by active carbon and filtered by quartz sand in sequence, wherein the back flushing fluid filtered by the quartz sand is conveyed to a feed inlet of a carbonization furnace through a pipeline;
(5) after the materials entering the drying device 13 are dried, the materials are conveyed to the granulating device 14 from a discharge port of the drying device 13 for granulation, then the materials are conveyed to the carbonization furnace 12 for carbonization treatment at the temperature of 800 ℃, and finally the carbonized materials obtained by blanking can be used as a water purifying agent, a soil conditioner, a fertilizer or a solid fuel.
The invention adopts the technical scheme that livestock manure and feed residues in the livestock house are washed and conveyed to a collecting tank from a sewage outlet of the livestock house through a pipeline for preliminary collection, then the mixed liquid in the collecting tank is subjected to preliminary solid-liquid separation, part of waste residues with higher solid content are conveyed to a drying device for drying, the other liquid-phase mixed liquid is conveyed to a methane tank for methane fermentation and utilization, a flocculating agent is added into the fermented methane liquid and the fermented methane residues for precipitation, so that most of suspended matters and heavy metal substances in the methane liquid and the methane residues are precipitated and treated into precipitates, part of clear mixed liquid is separated by a concentration and separation device, high-temperature treatment is carried out by an air stripping device, microorganisms in the separated clear mixed liquid are killed, and the materials in the air stripping device are titrated by an MAP method to remove ammonia nitrogen in the materials, the generated magnesium ammonium phosphate can be used as a fertilizer and can be separated out only by simple solid-liquid separation, therefore, the problem of secondary pollution in the material treatment process can not be caused, the material output from the discharge hole of the air stripping device is irradiated by an ultraviolet lamp, filtered by active carbon and filtered by quartz sand, and then the solution obtained by treatment is conveyed back to the washing liquid inlet of the livestock and poultry house for recycling, so that the washing cost of the livestock and poultry house is greatly reduced, in addition, the carbonized materials obtained after the solid-phase substances obtained by concentration and separation sequentially pass through the high-pressure steam oven, the drying device, the granulating device and the carbonization oven can be used as a water quality purifying agent, a soil conditioner, a fertilizer or a solid fuel, secondary economic value is created, all wastes in the livestock and poultry house culture process are recycled, and the aim of zero pollution emission is fulfilled.
The foregoing is directed to embodiments of the present invention, and equivalents, modifications, substitutions and variations such as will occur to those skilled in the art, which fall within the scope and spirit of the appended claims.
Claims (8)
1. A processing system that is used for zero pollutant discharge of livestock and poultry industry, its characterized in that: it comprises a livestock and poultry house, a collecting tank, a methane tank, a concentration and separation device, a blowing and separating device, a filter pressing device, a high-pressure steam boiler, a drying device and a carbonization furnace which are arranged in sequence, wherein a drain outlet of the livestock and poultry house is connected with a feed inlet of the collecting tank through a pipeline, a discharge outlet of the collecting tank is connected with the feed inlet of the methane tank, feed liquid fermented by the methane tank is conveyed to the feed inlet of the concentration and separation device through the discharge outlet of the methane tank and enters the concentration and separation device through the pipeline, a liquid phase outlet of the concentration and separation device is connected with the feed inlet of the blowing and separating device, a solid phase outlet of the concentration and separation device is connected with the feed inlet of the filter pressing device, a solid phase outlet of the filter pressing device is connected with the feed inlet of the high-pressure steam boiler, a liquid phase outlet of the, the discharge hole of the blowing-off device is connected with a flushing fluid inlet of a livestock and poultry house, the solid phase outlet of the high-pressure steam boiler is connected with the feed inlet of the drying device, and the discharge hole of the drying device is connected with the feed inlet of the carbonization furnace;
a discharge port of the collecting tank is provided with a solid-liquid separation device, liquid-phase substances separated by the solid-liquid separation device are conveyed to a feed port of the methane tank from the discharge port of the collecting tank through a pipeline, and solid-phase substances separated by the solid-liquid separation device are conveyed to a feed port of a drying device through a conveying device and enter the drying device;
the device is characterized in that a primary sedimentation tank is further arranged on a connecting pipeline between the methane tank and the concentration and separation device, a feed inlet of the primary sedimentation tank is connected with a discharge outlet of the methane tank, a discharge outlet of the primary sedimentation tank is connected with a feed inlet of the concentration and separation device, and a branch connected with the feed inlet of the primary sedimentation tank is further arranged on a pipeline connecting the collection tank and the methane tank.
2. The zero pollutant discharge treatment system for livestock and poultry industry of claim 1, wherein: still be equipped with the second grade sedimentation tank between the solid phase export of concentration separator and filter pressing device's the feed inlet, the feed inlet and the solid phase exit linkage of concentration separator of second grade sedimentation tank, the discharge gate and the filter pressing device's of second grade sedimentation tank feed inlet are connected.
3. The zero pollutant discharge treatment system for livestock and poultry industry of claim 1, wherein: and a quartz sand filter tower is also arranged between the blow-off device and the livestock and poultry house, a water inlet of the quartz sand filter tower is connected with a discharge hole of the blow-off device, and a water outlet of the quartz sand filter tower is connected with a flushing fluid inlet of the livestock and poultry house.
4. A treatment system for zero polluting emissions from livestock and poultry farming according to claim 3 wherein: the same end of the quartz sand filter tower, which is positioned at the water inlet, is also provided with a back flush water outlet which is connected with a feed inlet pipeline of the carbonization furnace, the same end of the quartz sand filter tower, which is positioned at the water outlet, is provided with a back flush water inlet, and the back flush water inlet is connected with an external water supply pipeline.
5. A treatment system for zero polluting emissions from livestock and poultry farming according to claim 3 wherein: and an active carbon filter tower is also arranged between the air stripping device and the quartz sand filter tower, a water inlet of the active carbon filter tower is connected with a discharge hole of the air stripping device, and a water outlet of the active carbon filter tower is connected with a water inlet of the quartz sand filter tower.
6. The zero pollutant discharge treatment system for livestock and poultry industry of claim 1, wherein: drying device and carbide furnace between still be equipped with prilling granulator, prilling granulator's feed inlet is connected with drying device's discharge gate, prilling granulator's discharge gate is connected with the feed inlet of carbide furnace.
7. The method as claimed in any one of claims 1 to 6, wherein the treatment system comprises: which comprises the following steps:
(1) introducing flushing liquid into the livestock and poultry house to flush livestock and poultry manure and feed residues in the livestock and poultry house and conveying the livestock and poultry manure and the feed residues to a collection tank from a sewage discharge outlet of the livestock and poultry house through a pipeline, after the mixed liquid in the collection tank is subjected to preliminary solid-liquid separation, conveying a liquid-phase material to a feed inlet of a methane tank from a discharge outlet of the collection tank or directly outputting the liquid-phase material from a discharge outlet of the collection tank according to the capacity condition of the methane tank, then carrying out dosing flocculation treatment, then conveying the flocculated and precipitated material to a concentration separation device for solid-liquid separation, and conveying solid-phase substances with the water content of 60-70% in the mixed liquid subjected to preliminary solid-liquid separation in the collection tank to a drying device for drying;
(2) after anaerobic fermentation is carried out on liquid-phase materials entering a methane tank for 40-60 days at the temperature of 20-30 ℃, a flocculating agent is added into the methane liquid for flocculation reaction, so that suspended matters, phosphorus and heavy metal substances in the methane liquid are reacted and precipitated, and then the methane liquid and methane slag after flocculation reaction are conveyed to a concentration separation device for solid-liquid separation;
(3) supernatant obtained by separating materials entering the solid-liquid separation device is conveyed to a feed inlet of the air stripping device from a liquid phase outlet of the concentration separation device and enters the air stripping device, suspension and solid-phase materials in the concentration separation device are discharged from a solid phase outlet of the concentration separation device and are added with flocculating agent again for reaction, then the materials are conveyed to a filter pressing device for filter pressing, clear solution obtained by filter pressing of the filter pressing device is conveyed to the feed inlet of the air stripping device from the liquid phase outlet of the filter pressing device and enters the air stripping device, and solid-phase materials obtained by filter pressing of the filter pressing device are conveyed to the feed inlet of a high-pressure steam boiler from the solid phase outlet of the filter pressing device and enter a high-pressure steam boiler;
(4) after the high-pressure steam boiler processes the materials entering the high-pressure steam boiler for 20min according to the operation parameters of 0.5Mpa and 160-170 ℃, the generated high-pressure steam is conveyed to a feeding hole of the blowing-off device through a liquid-phase outlet at the upper end of the high-pressure steam boiler, and the solid-phase substances processed by the high-pressure steam boiler are conveyed to a feeding hole of the drying device through a solid-phase outlet at the lower part of the high-pressure steam boiler; after the material entering the stripping device is boiled at high temperature, the material in the stripping device is titrated by using an MAP method to remove ammonia nitrogen in the material, then the material is discharged from a discharge hole of the stripping device, and the treated solution is conveyed back to a flushing fluid inlet of a livestock and poultry house for recycling after being irradiated by an ultraviolet lamp, filtered by active carbon and filtered by quartz sand in sequence, wherein the back flushing fluid filtered by the quartz sand is conveyed to a feed hole of a carbonization furnace through a pipeline;
(5) after the materials entering the drying device are dried, the materials are conveyed to a granulating device from a discharge port of the drying device for granulation, then the materials are conveyed to a carbonization furnace for carbonization treatment at the temperature of 800 ℃, and finally the carbonized materials obtained by blanking are used as water purifying agents, soil conditioners, fertilizers or solid fuels.
8. The zero pollutant discharge treatment system for livestock and poultry industry of claim 7, wherein: and the flocculating agent in the step (2) and the step (3) is inorganic aluminum salt or inorganic iron salt.
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| CN108727071A (en) * | 2018-07-03 | 2018-11-02 | 深圳市朗坤环境集团股份有限公司 | A kind of method of livestock and poultry feces recycling |
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