CN105967414A - Biogas slurry resource concentration recycling treatment method and system - Google Patents

Biogas slurry resource concentration recycling treatment method and system Download PDF

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Publication number
CN105967414A
CN105967414A CN201610238912.1A CN201610238912A CN105967414A CN 105967414 A CN105967414 A CN 105967414A CN 201610238912 A CN201610238912 A CN 201610238912A CN 105967414 A CN105967414 A CN 105967414A
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biogas slurry
reverse osmosis
liquid fertilizer
storage tank
nanofiltration
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潘亚
罗荣晶
黄源桃
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Nanjing New Energy Co Ltd Titanium
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Nanjing New Energy Co Ltd Titanium
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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
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F5/00—Fertilisers from distillery wastes, molasses, vinasses, sugar plant or similar wastes or residues, e.g. from waste originating from industrial processing of raw material of agricultural origin or derived products thereof
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
    • 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
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • 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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • 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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
    • 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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/007—Modular design
    • 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
    • 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
    • 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
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Botany (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Fertilizers (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention relates to a biogas slurry resource recycling treatment method and treatment system; the treatment method includes the treatment processes of adjusting pond treatment, pretreatment, solid-liquid separation, multistage membrane concentration treatment, multi-effect evaporation, finished product sterilization packaging and cleaning and sewage treatment operation. Ordinary biogas slurry can be filtered and concentrated into an efficient organic liquid fertilizer product, the purpose of circular use of resources is achieved, moreover, the filtrate is up to standard and discharged or reused, the scope of use is expanded, high added value utilization of the biogas slurry is achieved, environmental pollution is also avoided, additional addition of substances is not need, and the product quality optimization can be ensured; and the diversity of the product is achieved.

Description

A kind of biogas slurry resource concentration and recovery utilizes processing method and system
Technical field
The invention belongs to biogas slurry application technology as the second resource field, be specifically related to a kind of biogas slurry resource recycling process side Method and processing system.
Background technology
Along with quantity and the intensive degree of China's scale livestock farming improve constantly, the amount that garbage produces is big and collects In, the problem of environmental pollution causing livestock and poultry feces is the most serious.It is a kind of for using Anaerobic Digestion livestock and poultry farm feces and sewage Very effective offal treatment and utilization ways, pass through anaerobic fermentation, it is possible to realizes garbage harmless treatment, moreover it is possible to produces The purposes such as substantial amounts of biogas is used for warming oneself, cooking and generating, do not contain only N P and K etc. in biogas residue after fermentation and biogas slurry simultaneously The micronutrient element such as macronutrient and zinc, and containing several amino acids, vitamin, protein, auxin, organized enzyme Deng material, farmland can be applied to as fertilizer and soil conditioner.
But, current scale biogas engineering produces a large amount of high concentration biogas residue, biogas slurry, and its process problem gradually highlights.Though So containing nutrient substance such as substantial amounts of organic matter, humic acid in biogas residue, biogas slurry, it is back to farmland and can be effectively improved agricultural product product Amount, but in biogas slurry, effective ingredient relative amount is relatively low, does not has enough farmlands to dissolve around offal treatment engineering, and distance is transported Defeated cost increases, and causes the limitation that biogas slurry is used, and it is little that the land management of China farmland disperses in addition, peasant household has land area, Biogas slurry also field still cannot be widely implemented in China.Simultaneously compared with chemical fertilizer or organic commercial fertilizer, every nutrition unit in biogas slurry Element concentration is on the low side, and the enthusiasm that peasant utilizes is the highest, limits the feasibility that agricultural is dissolved to a certain extent.Additionally, it is unreasonable Utilization will cause biogas slurry directly to be discharged, and causes the secondary pollution of environment.
Biogas slurry application technology as the second resource scheme of the prior art is mainly by biogas slurry after precipitation, filtration, through membrance concentration Process, produce biogas slurry concentrated solution.The subject matter that this processing mode exists is: biogas slurry is utilized the most complete by (1)；(2) Due to high containing substantial amounts of impurity and viscosity in biogas slurry, after simple precipitation, filtering and impurity removing, can not effectively change biogas slurry impurity The feature that many, viscosity is big, still has substantial amounts of impurity and insoluble matter blocking film, causes Membrane cleaning increased frequency, and film is fragile, increases Operating cost, engineering stability is poor.
Therefore, how to concentrate the effective ingredient in biogas slurry, common biogas slurry filtering and concentrating being made has efficiently Machine liquid fertilizer product, it is achieved the purpose of resource circulation utilization, make simultaneously filtered solution can qualified discharge or reuse, expand range, Realizing the high value added utilization of biogas slurry, avoid environmental pollution is the technical issues that need to address now simultaneously.
Summary of the invention
The present invention is according to the deficiencies in the prior art, it is provided that a kind of biogas slurry resource concentration and recovery utilize processing method and be System, the utility in biogas slurry is carried out resource recycling, filter, concentrate after biogas slurry can as foliage fertilizer mother solution, The treated equipment that may be used for of isolated sewage cleans and directly discharge.
The present invention is achieved by the following technical solutions:
The processing method that a kind of biogas slurry resource concentration and recovery utilizes, it is characterised in that this processing method includes following step Rapid:
S1, regulating reservoir process: store in first biogas slurry is delivered to biogas slurry regulating reservoir 1, with arrange in biogas slurry regulating reservoir 1 Biogas slurry is sufficiently stirred for homogenizing by diving mixer, and through filter screen 2, biogas slurry is carried out coarse filtration, to remove in the middle part of biogas slurry sub-sand gravel and big The insoluble impurity of granule, is then delivered to pretreatment unit by biogas slurry；
S2, pretreatment: the biogas slurry processed by regulating reservoir is acidified in being delivered to acidizing hydrolyzation tank 3 after air floatation machine Hydrolysis, controls temperature and is 25-30 DEG C, macromole in biogas slurry and part solid float is degraded, operates to help later separation；
S3, solid-liquid separation: pretreated biogas slurry is delivered in solid-liquid separation unit and separated further, concentrate, Described solid-liquid separation unit includes self priming pump 4 and biogas slurry defecator 5, biogas residue collecting box 6 and biogas slurry stock solution storage tank 7, described natural pond Liquid defecator 5 uses inorganic ceramic film as concentrating, separating film, enters the solid float in biogas slurry and larger molecular organics Row intercepts, and the permeate of generation enters Multistage Membranes upgrading unit, the dope of generation and biogas residue after being delivered to biogas slurry stock solution storage tank 7 and uses In making punching fertilising or solid biologic fertilizer；
S4, Multistage Membranes concentration: the biogas slurry operated through pretreatment and solid-liquid separation is delivered to biogas slurry stock solution storage tank 7, it is delivered to biogas slurry ultrafiltration apparatus 10 from biogas slurry stock solution storage tank 7 subsequently and it is carried out hyperfiltration treatment, biogas slurry hyperfiltration treatment uses even The continuous mode concentrated, described biogas slurry ultrafiltration apparatus 10 is provided with three grades of ultrafilter membranes, is directly entered by the concentrated solution of one-level ultrafilter membrane Enter two-stage ultrafiltering film to continue to concentrate, enter three grades of ultrafilter membranes by the concentrated solution of two-stage ultrafiltering film and continue to concentrate；At biogas slurry ultrafiltration Ultrafiltration permeate is obtained and containing solid float and the ultrafiltration dope of larger molecular organics after reason；Described ultrafiltration dope can conduct Punching fertilising；
Ultrafiltration permeate is delivered to biogas slurry nanofiltration device 13 and carries out nanofiltration process, obtain nanofiltration permeate and containing bivalence Ion salt and the relative molecular mass organic nanofiltration dope more than 200；
Nanofiltration permeate is delivered to the reverse osmosis membrane enrichment facility 17 only allowing ammonia nitrogen and water to pass through, obtains reverse osmosis saturating Cross liquid and the reverse osmosis dope containing monovalent ion salt with low-molecular-weight organic matter；
Reverse osmosis dope after nanofiltration dope after nanofiltration concentration and reverse osmosis concentration being processed is according to different proportion Mix and i.e. obtain different biogas slurry concentrated solutions；
Wherein, described biogas slurry ultrafiltration apparatus 10, biogas slurry nanofiltration device 13 and reverse osmosis membrane enrichment facility 17 all use PLC certainly Dynamic control unit controls；
S5, multiple-effect evaporation: biogas slurry concentrated solution is delivered to multiple-effect evaporation unit and concentrates further；Described multiple-effect evaporation Unit uses triple-effect evaporation plant, and wherein 1st effective evaporator control temperature is at 110-130 DEG C, and two effects and triple effect evaporator control temperature Degree is at 95-105 DEG C；
Biogas slurry concentrated solution, after multiple-effect evaporation unit concentrates and becomes liquid fertilizer, is delivered to organic dense through multiple-effect evaporation delivery pump 23 Store in contracting composite liquid fertilizer storage tank 24；
S6, finished product packing: the liquid fertilizer being stored in organic concentration composite liquid fertilizer storage tank (24) after concentrating multiple-effect evaporation enters Row packaging；
S7, cleaning and sewage disposal: after the evaporation condensate that multiple-effect evaporation processing procedure produces processes with reverse osmosis concentration Produced permeate carries out deamination process and is delivered to water purification storage tank, can be as the cleaning water of purging system device；Clean each Sewage after device enters sewage treatment plant and focuses on.
Preferably, the described ultrafilter membrane of described biogas slurry ultrafiltration apparatus 10 uses inorganic ceramic film, and membrane aperture is 100- 200nm, membrane flux are 60-65L/m2.h, transmembrane pressure 0.10-0.20MPa；Described inorganic ceramic film is that multichannel is cylindrical, Using circular or sector channel, a length of 1100mm of membrane tube, membrane tube external diameter is 25-30mm, and effective film area is 0.19m2。
Preferably, the aperture of the NF membrane of described biogas slurry nanofiltration device 13 be 1-10nm, membrane flux be 40-50L/m2.h、 Inlet pressure is 1.0-2.0MPa.
Preferably, described reverse osmosis membrane enrichment facility 17 can effectively catching monovalent ion, make the deliquescent N in biogas slurry, P, K, micro-element nutrition element are trapped concentration, and the reverse osmosis dope obtained can be used for making high-grade foliage fertilizer, described reverse osmosis The reverse osmosis membrane aperture of permeable membrane enrichment facility 17 only allows NH3、H2O passes through, and membrane flux is 35-40L/m2.h, inlet pressure is 2.5-3.5MPa。
Present invention also offers a kind of biogas slurry resource concentration and recovery and utilize processing system, including biogas slurry regulating reservoir 1, locate in advance Reason unit, solid-liquid separation unit, Multistage Membranes upgrading unit, multiple-effect evaporation unit, sewage disposal and cleaning unit, packaging unit and Control unit；
Described biogas slurry regulating reservoir 1 is provided with diving mixer and filter screen 2；
Described pretreatment unit mainly includes that air floatation machine and acidizing hydrolyzation tank 3, described acidizing hydrolyzation tank 3 can destroy biogas slurry In charge balance, the macromole in biogas slurry and part solid content are degraded, contribute to later separation operation；
Described solid-liquid separation unit includes self priming pump 4, biogas slurry defecator 5, biogas residue collecting box 6 and biogas slurry stock solution storage tank 7, Described biogas slurry defecator 5 uses inorganic ceramic film as concentrating, separating film, hangs the solid in the biogas slurry after preprocessed Float and larger molecular organics intercept；
Described Multistage Membranes upgrading unit includes biogas slurry stock solution delivery pump 8, the biogas slurry stock solution being sequentially connected with by conveyance conduit Effusion meter 9, biogas slurry ultrafiltration apparatus 10, auxiliary delivery pump 11, nanofiltration device inlet flow rate meter 12, biogas slurry nanofiltration device 13, nanofiltration Liquid storage tank 14, nanofiltration liquid high-pressure delivery pump 15, reverse osmosis membrane apparatus inlet flow gauge 16, reverse osmosis membrane enrichment facility 17, reverse osmosis Permeable membrane enrichment facility concentrated solution discharge meter 18, reverse osmosis membrane enrichment facility permeate effusion meter 19 and biogas slurry concentrated solution storage tank 20, Described Multistage Membranes upgrading unit can retain the material of different molecular weight in biogas slurry respectively, forms different separation gradients, makes each section Isolate the concentrated solution of heterogeneity, can be made into the foliage fertilizer product of multi items；
Described multiple-effect evaporation unit includes biogas slurry concentrated solution delivery pump 21, multi-effect evaporating device 22, multiple-effect evaporation delivery pump 23；Described multi-effect evaporating device 22 uses two-stage or more than the vaporizer of two-stage series connection, can by one-level evaporator evaporation out Indirect steam introduces next stage vaporizer, utilizes it to condense the feed liquid in the energy heats vaporizer released to make full use of heat Energy；
Described sewage disposal and cleaning unit include deamination processing means, high pressure cleaning pump 30 and water purification storage tank 31；This is single Unit's produced permeate deamination after evaporation condensate Multi-effect Evaporation Processes produced processes with reverse osmosis concentration processes And it is delivered to water purification storage tank 31；
Described packaging unit includes organic concentration composite liquid fertilizer storage tank 24, liquid fertilizer delivery pump 25, liquid fertilizer effusion meter 26, liquid fertilizer Gravity tank 27, liquid fertilizer compensator 28 and liquid fertilizer flexible package heat-sealing machine 29, the liquid fertilizer after concentrating multiple-effect evaporation is packed；
Described control unit is for being controlled Multistage Membranes upgrading unit and multiple-effect evaporation unit；Described control unit Including PLC automatic control unit and electric control unit, wherein, described multiple-effect evaporation unit passes through electric control system, adopts Control the mode combined with instrument with execute-in-place.
In processing procedure, first biogas slurry stores in biogas slurry regulating reservoir 1, the submersible agitating arranged in biogas slurry regulating reservoir 1 Machine carries out coarse filtration through filter screen 2 after former biogas slurry is sufficiently stirred for homogenizing；Then the biogas slurry processed by regulating reservoir is through air floatation machine Acidification hydrolization is carried out in being delivered to acidizing hydrolyzation tank 3；Entered in biogas slurry defecator 5 by self priming pump 4 subsequently and divided further From, concentrate, the dope of generation and biogas residue flow into biogas residue collecting box 6 and are used for making punching fertilising or solid biologic is fertile, passing through of generation Liquid enters biogas slurry stock solution storage tank 7 and deposits；Biogas slurry in biogas slurry stock solution storage tank 7 is through biogas slurry stock solution delivery pump 8 and biogas slurry stock solution stream Gauge 9 enters biogas slurry ultrafiltration apparatus 10, obtains ultrafiltration permeate and the ultrafiltration containing solid float and larger molecular organics is dense Liquid；Ultrafiltration permeate is delivered to biogas slurry nanofiltration device 13 carries out nanofiltration through auxiliary delivery pump 11 and nanofiltration device inlet flow rate meter 12 Process, obtain nanofiltration permeate and the organic nanofiltration dope being more than 200 with relative molecular mass containing divalent ion salt；Receive Filter dope is delivered in biogas slurry concentrated solution storage tank 20 or directly derives and makes fertilizer；Nanofiltration permeate through nanofiltration liquid storage tank 14, receive Filtrate high-pressure delivery pump 15 and reverse osmosis membrane apparatus inlet flow gauge 16 are delivered to reverse osmosis membrane enrichment facility 17 further, through anti- Permeable membrane enrichment facility 17 is filtrated to get reverse osmosis permeate and the reverse osmosis containing monovalent ion salt with low-molecular-weight organic matter Dope；Reverse osmosis permeate can be delivered to be used as in water purification storage tank 31 cleaning water of equipment after deamination processes；Reverse osmosis Dope is delivered in biogas slurry concentrated solution storage tank 20 through reverse osmosis membrane enrichment facility concentrated solution discharge meter 18 or directly derives and makes fertilizer Material；Can be made from the nanofiltration dope of biogas slurry nanofiltration device 13 and anti-from reverse osmosis membrane enrichment facility 17 by regulation flow Infiltration dope is mixed to get different biogas slurry concentrated solutions according to different proportion in biogas slurry concentrated solution storage tank 20；Biogas slurry concentrated solution is again It is delivered to multi-effect evaporating device 22 through biogas slurry concentrated solution delivery pump 21 concentrate further；
Biogas slurry concentrated solution concentrates in multi-effect evaporating device 22 and becomes liquid fertilizer and be delivered to organic through multiple-effect evaporation delivery pump 23 Store in concentrating composite liquid fertilizer storage tank 24；Liquid fertilizer in organic concentration composite liquid fertilizer storage tank 24 is carried by liquid fertilizer through connecting pipeline Pump 25 is delivered to liquid fertilizer gravity tank 27 through liquid fertilizer effusion meter 26, and organic concentration composite liquid fertilizer relies on deadweight in liquid fertilizer gravity tank 27 Flow in liquid fertilizer compensator 28, then rely on liquid deadweight to pack in flowing to liquid fertilizer flexible package heat-sealing machine 29.
Preferably, the liquid fertilizer in organic concentration composite liquid fertilizer storage tank 24 is by connecting pipeline through liquid fertilizer delivery pump 25 and liquid fertilizer After effusion meter 26, can be delivered directly at filling valve to realize barreled and bottled through an other branch line.
Preferably, the outlet at bottom of described liquid fertilizer gravity tank 27 is put down higher than the upper entrance of liquid fertilizer compensator 28, liquid fertilizer The outlet at bottom of weighing apparatus tank 28 is higher than the upper entrance of liquid fertilizer flexible package heat-sealing machine 29.
Compared with prior art, the invention has the beneficial effects as follows:
1, have selected more economically for the treatment of in accordance with local conditions, efficient technique；With the addition of pretreating process before film, including precipitation, Filter, the follow-up membrance concentration of acidification hydrolization technique, beneficially material processes, and improves membrane flux, reduces Membrane cleaning number of times, reduces film and damages Consumption.Testing and verification, former biogas slurry after pretreating process before film, membrane flux improves about 40%.
2, the macromolecular complex including antibacterial, Organic substance containing fishy odor is filtered by biogas slurry Multistage Membranes upgrading unit After matter, eliminate the abnormal flavour in biogas slurry, it is simple to it is fertile that people use biogas slurry.
3, biogas slurry filters at many levels, concentrates and the whole production process such as separation is all to carry out by the method for physics, filters Harmful components in biogas slurry also make the active ingredient of biogas slurry be sufficiently reserved and any change does not occur, the quality of liquid fertilizer It is improved；It is not required to extra substance, it is possible to ensure product quality optimization；Achieve the multiformity of product.
4, achieve through engineering approaches biogas slurry recycling treatment, solve the technical bottleneck that through engineering approaches membrance concentration processes.Utilize this The processing method of invention and system, working day 330 days per year, within 24 hours, run (wherein Membrane cleaning 4 hours) continuously, disposal ability For 5m3/h.For chicken manure or pig manure fermentation biogas slurry, the biogas slurry that every day processes is up to 100m3, produce 7 times of volume concentration punching fertilisings every day (or solid organic fertilizer) raw material 15 tons；Produce 10 times of volume concentration liquid fertilizers 10 tons every day；Produce recycle-water 75 tons every day.
5, the effectively integrating of the three concentrated filter membranes in road in Multistage Membranes upgrading unit, utilizes three road films to retain technology and retains difference The material of molecular weight, carries out differentiation exploitation for different dopes, improves biogas slurry value.After pretreating process before film Biogas slurry, first pass around the ultrafilter membrane of inorganic ceramic film and carry out filtering and impurity removing, then sequentially pass through NF membrane, reverse osmosis membrane carries out cutting Stay concentration, be finally reached the solid insoluble particles removed in biogas slurry and other is difficult to macromolecular substances absorbed by crops, high power Concentrate the purpose of biogas slurry organic molecule nutrient substance.
6, equipment is produced simple to operate, it is simple to grasp, be particularly well-suited to large methane tank and support the use；
What 7, whole production process finally obtained is that organic biogas slurry that concentration is the highest concentrates composite liquid fertilizer, makes liquid fertilizer use Quantity relatively reduce, reduce the labor intensity of liquid fertilizer freight and fertilising, expand the range that biogas slurry is fertile；
8, changing waste into resources receives rational application, and decreases the non-fertile dirt that season, environment was caused by the unordered discharge of biogas slurry Dye；
9, multiple-effect evaporation evaporation technique and membrane filtration technique are effectively combined, it is to avoid membrane separation technique cycles of concentration is little Inferior position, and multiple-effect evaporation counter film be in the case of temperature is higher run, the biological bacteria in biogas slurry is also had and kills work With so that the preservation condition of final products is more loose, need not consider the generation gone bad.Both possessed membrane separation technique technological process Simply, the fluid flowing strong advantage of controllability, possessing again multiple-effect evaporation can the advantage of Flexible Control cycles of concentration.
Accompanying drawing explanation
Fig. 1 is the flow diagram of the biogas slurry resource recycling processing method of the present invention；
Fig. 2 is each device connection diagram that the biogas slurry resource concentration and recovery of the present invention utilizes processing system；
Fig. 3 is the partial structurtes schematic diagram of the reverse osmosis membrane post in the reverse osmosis membrane enrichment facility in the present invention；
Fig. 4 is the structural representation of the multi-effect evaporating device in the present invention；
In figure: 1, biogas slurry regulating reservoir, 2, filter screen, 3, acidizing hydrolyzation tank, 4, self priming pump, 5, biogas slurry defecator, 6, biogas residue Collecting box, 7, biogas slurry stock solution storage tank, 8, biogas slurry stock solution delivery pump, 9, biogas slurry stock solution flow meter, 10, biogas slurry ultrafiltration apparatus, 11, auxiliary Help delivery pump, 12, nanofiltration device inlet flow rate meter, 13, biogas slurry nanofiltration device, 14, nanofiltration liquid storage tank, 15, nanofiltration liquid high pressure defeated Send pump, 16, reverse osmosis membrane apparatus inlet flow gauge, 17, reverse osmosis membrane enrichment facility, 18, reverse osmosis membrane enrichment facility concentrated solution Effusion meter, 19, reverse osmosis membrane enrichment facility permeate effusion meter, 20, biogas slurry concentrated solution storage tank, 21, biogas slurry concentrated solution delivery pump, 22, multi-effect evaporating device, 23, multiple-effect evaporation delivery pump, 24, organic concentration composite liquid fertilizer storage tank, 25, liquid fertilizer delivery pump, 26, liquid Fertile effusion meter, 27, liquid fertilizer gravity tank, 28, liquid fertilizer compensator, 29, liquid fertilizer flexible package heat-sealing machine, 30, high pressure cleaning pump, 31, clean Water storage tank, 32, reverse osmosis membrane post, 221, condensed water discharge outlet, 222, steam inlet, 223, feed liquid port, 224, evaporator, 225, steam (vapor) outlet, 226, heater, 227, steam pipe, 228, condenser, 229, liquid outlet, 321, shell, 322, multilayer film Sheet, 323, flow guiding disc.
Detailed description of the invention
Being described principle and the feature of the present invention below in conjunction with accompanying drawing, cited detailed description of the invention is served only for solving Release the present invention, be not intended to limit the scope of the present invention.
Fig. 1 is the flow diagram of the biogas slurry resource recycling processing method of the present invention；As it can be seen, this process side Method comprises the following steps:
S1, regulating reservoir process: store in first biogas slurry is delivered to biogas slurry regulating reservoir 1, with arrange in biogas slurry regulating reservoir 1 Biogas slurry is sufficiently stirred for homogenizing by diving mixer, and through filter screen 2, biogas slurry is carried out coarse filtration, to remove in the middle part of biogas slurry sub-sand gravel and big The insoluble impurity of granule, is then delivered to pretreatment unit by biogas slurry；
S2, pretreatment: the biogas slurry processed by regulating reservoir is acidified in being delivered to acidizing hydrolyzation tank 3 after air floatation machine Hydrolysis, acidizing hydrolyzation tank 3 can destroy the charge balance in biogas slurry, controls temperature and is 25-30 DEG C, by macromole in biogas slurry and portion Divide the degraded of solid float, operate to help later separation；
S3, solid-liquid separation: pretreated biogas slurry is delivered in solid-liquid separation unit and separated further, concentrate, Described solid-liquid separation unit includes self priming pump 4 and biogas slurry defecator 5, biogas residue collecting box 6 and biogas slurry stock solution storage tank 7, described natural pond Liquid defecator 5 uses inorganic ceramic film as concentrating, separating film, enters the solid float in biogas slurry and larger molecular organics Row intercepts, and the permeate of generation enters Multistage Membranes upgrading unit, the dope of generation and biogas residue after being delivered to biogas slurry stock solution storage tank 7 and uses In making punching fertilising or solid biologic fertilizer；
S4, Multistage Membranes concentration: the biogas slurry operated through pretreatment and solid-liquid separation is delivered to biogas slurry stock solution storage tank 7, it is delivered to biogas slurry ultrafiltration apparatus 10 from biogas slurry stock solution storage tank 7 subsequently and it is carried out hyperfiltration treatment, biogas slurry hyperfiltration treatment uses even The continuous mode concentrated, described biogas slurry ultrafiltration apparatus 10 is provided with three grades of ultrafilter membranes, is directly entered by the concentrated solution of one-level ultrafilter membrane Enter two-stage ultrafiltering film to continue to concentrate, enter three grades of ultrafilter membranes by the concentrated solution of two-stage ultrafiltering film and continue to concentrate；
The described ultrafilter membrane of described biogas slurry ultrafiltration apparatus 10 uses inorganic ceramic film, and membrane aperture is 100-200nm, membrane flux For 60-65L/m2.h, transmembrane pressure 0.10-0.20MPa；Described inorganic ceramic film is that multichannel is cylindrical, uses circular or fan Shape passage, a length of 1100mm of membrane tube, membrane tube external diameter is 25-30mm, and effective film area is 0.19m2；After biogas slurry hyperfiltration treatment Obtain ultrafiltration permeate and containing solid float and the ultrafiltration dope of larger molecular organics；Described ultrafiltration dope can be executed as punching Fertile；
Ultrafiltration permeate is delivered to biogas slurry nanofiltration device 13 and carries out nanofiltration process, the nanofiltration of described biogas slurry nanofiltration device 13 The aperture of film is 1-10nm, membrane flux is 40-50L/m2.h, inlet pressure is 1.0-2.0Mpa；Nanofiltration obtains nanofiltration after processing Permeate and the organic nanofiltration dope being more than 200 with relative molecular mass containing divalent ion salt；
Nanofiltration permeate is delivered to the reverse osmosis membrane enrichment facility 17 only allowing ammonia nitrogen and water to pass through, described reverse osmosis membrane Enrichment facility 17 energy effectively catching monovalent ion, makes the deliquescent N in biogas slurry, P, K, micro-element nutrition element be trapped dense Contracting, the reverse osmosis dope obtained can be used for making high-grade foliage fertilizer, and the reverse osmosis membrane aperture of reverse osmosis membrane enrichment facility 17 only permits Permitted NH3、H2O passes through, and membrane flux is 35-40L/m2.h, inlet pressure is 2.5-3.5Mpa；Reverse osmosis is obtained after reverse osmosis concentration Permeate and the reverse osmosis dope containing monovalent ion salt with low-molecular-weight organic matter；
Reverse osmosis dope after nanofiltration dope after nanofiltration concentration and reverse osmosis concentration being processed is according to different proportion Mix and i.e. obtain different biogas slurry concentrated solutions；
Wherein, described biogas slurry ultrafiltration apparatus 10, biogas slurry nanofiltration device 13 and reverse osmosis membrane enrichment facility 17 all use PLC certainly Dynamic control unit controls；
S5, multiple-effect evaporation: biogas slurry concentrated solution is delivered to multiple-effect evaporation unit and concentrates further；Described multiple-effect evaporation Unit uses triple-effect evaporation plant, and wherein 1st effective evaporator control temperature is at 110-130 DEG C, and two effects and triple effect evaporator control temperature Degree is at 95-105 DEG C；
Biogas slurry concentrated solution, after multiple-effect evaporation unit concentrates and becomes liquid fertilizer, is delivered to organic dense through multiple-effect evaporation delivery pump 23 Store in contracting composite liquid fertilizer storage tank 24；
S6, finished product packing: pack after the liquid fertilizer effusion meter 26 in organic concentration composite liquid fertilizer storage tank 24；
S7, cleaning and sewage disposal: after the evaporation condensate that multiple-effect evaporation processing procedure produces processes with reverse osmosis concentration Produced permeate carries out deamination process and is delivered to water purification storage tank, can be as the cleaning water of purging system device；Clean each Sewage after device enters sewage treatment plant and focuses on.
Fig. 2 is that a kind of biogas slurry resource concentration and recovery that the present invention provides utilizes each device of processing system to connect signal Figure, according to a specific embodiment of the present invention, this processing system includes that the biogas slurry being sequentially connected with by conveyance conduit is regulated Pond 1, pretreatment unit, solid-liquid separation unit, Multistage Membranes upgrading unit, multiple-effect evaporation unit, packaging unit, also include controlling list Unit and sewage disposal and cleaning unit.
Biogas slurry regulating reservoir 1 is wherein provided with diving mixer and filter screen 2；Diving mixer can will be stored in biogas slurry regulation In pond 1, biogas slurry is sufficiently stirred for homogenizing, and filter screen 2 carries out coarse filtration to it again, to remove the part gravel in biogas slurry and bulky grain not Molten impurity, is then delivered to pretreatment unit by biogas slurry.
Described pretreatment unit mainly includes air floatation machine (not shown) and acidizing hydrolyzation tank 3, described acidizing hydrolyzation tank 3 The charge balance in biogas slurry can be destroyed, the macromole in biogas slurry and part solid content are degraded, contribute to later separation operation.
Described solid-liquid separation unit includes self priming pump 4 and biogas slurry defecator 5, and described biogas slurry defecator 5 uses inorganic Solid float in biogas slurry after preprocessed and larger molecular organics, as concentrating, separating film, are blocked by ceramic membrane Cutting, isolate the biogas residue and the dope of thickness being mainly made up of solid portion, isolated permeate continues to concentrate；To isolate Biogas residue and the dope of thickness be delivered to its exterior by conveyer device, make punching fertilising or solid biologic be fertile.
Described Multistage Membranes upgrading unit includes biogas slurry stock solution delivery pump 8, the biogas slurry stock solution being sequentially connected with by conveyance conduit Effusion meter 9, biogas slurry ultrafiltration apparatus 10, auxiliary delivery pump 11, nanofiltration device inlet flow rate meter 12, biogas slurry nanofiltration device 13, nanofiltration Liquid storage tank 14, nanofiltration liquid high-pressure delivery pump 15, reverse osmosis membrane apparatus inlet flow gauge 16, reverse osmosis membrane enrichment facility 17, reverse osmosis Permeable membrane enrichment facility concentrated solution discharge meter 18, reverse osmosis membrane enrichment facility permeate effusion meter 19 and biogas slurry concentrated solution storage tank 20, Described Multistage Membranes upgrading unit can retain the material of different molecular weight in biogas slurry respectively, forms different separation gradients, makes each section Isolate the concentrated solution of heterogeneity, can be made into the foliage fertilizer product of multi items.
Described multiple-effect evaporation unit includes biogas slurry concentrated solution delivery pump 21, multi-effect evaporating device 22, multiple-effect evaporation delivery pump 23；Described multi-effect evaporating device 22 is triple effect evaporation, use the vaporizer of thtee-stage shiplock, can by one-level evaporator evaporation out Indirect steam introduces next stage vaporizer, utilizes it to condense the feed liquid in the energy heats vaporizer released to make full use of heat Energy；Fig. 2 only represents multi-effect evaporating device 22, and the vaporizer of not specifically illustrated three series connection with schematic diagram.
Described sewage disposal and cleaning unit include deamination processing means, high pressure cleaning pump 30 and water purification storage tank 31；This is single Unit's produced permeate deamination after evaporation condensate Multi-effect Evaporation Processes produced processes with reverse osmosis concentration processes And it being delivered to water purification storage tank 31, water purification storage tank 31 filters dress with biogas slurry respectively also by high pressure cleaning pump 30 and water purification conveyance conduit Put 5, biogas slurry stock solution storage tank 7, biogas slurry ultrafiltration apparatus 10, biogas slurry nanofiltration device 13, nanofiltration liquid storage tank 14, reverse osmosis membrane enrichment facility 17, biogas slurry concentrated solution storage tank 20, multi-effect evaporating device 22, organic concentration composite liquid fertilizer storage tank 24 and liquid fertilizer gravity tank 27 connect Come, when cleaning operation, open the valve into water conveyance conduit and high pressure cleaning pump 30, corresponding device can be carried out clearly Wash.
Described packaging unit includes organic concentration composite liquid fertilizer storage tank 24, liquid fertilizer delivery pump 25, liquid fertilizer effusion meter 26, liquid fertilizer Gravity tank 27, liquid fertilizer compensator 28 and liquid fertilizer flexible package heat-sealing machine 29, the liquid fertilizer after concentrating multiple-effect evaporation carries out sterilizing Packaging；
Described control unit is for being controlled Multistage Membranes upgrading unit and multiple-effect evaporation unit；Described control unit Including PLC automatic control unit and electric control unit, wherein, described multiple-effect evaporation unit passes through electric control system, adopts Control the mode combined with instrument with execute-in-place.
In processing procedure, first biogas slurry stores in biogas slurry regulating reservoir 1, the submersible agitating arranged in biogas slurry regulating reservoir 1 Machine carries out coarse filtration through filter screen 2 after former biogas slurry is sufficiently stirred for homogenizing；Then the biogas slurry processed by regulating reservoir is through air floatation machine Acidification hydrolization is carried out in being delivered to acidizing hydrolyzation tank 3；Entered in biogas slurry defecator 5 by self priming pump 4 subsequently and divided further From, concentrate, the dope of generation and biogas residue flow into biogas residue collecting box 6 and are used for making punching fertilising or solid biologic is fertile, passing through of generation Liquid enters biogas slurry stock solution storage tank 7 and deposits；Biogas slurry in biogas slurry stock solution storage tank 7 is through biogas slurry stock solution delivery pump 8 and biogas slurry stock solution stream Gauge 9 enters biogas slurry ultrafiltration apparatus 10, obtains ultrafiltration permeate and the ultrafiltration containing solid float and larger molecular organics is dense Liquid；Ultrafiltration permeate is delivered to biogas slurry nanofiltration device 13 carries out nanofiltration through auxiliary delivery pump 11 and nanofiltration device inlet flow rate meter 12 Process, obtain nanofiltration permeate and the organic nanofiltration dope being more than 200 with relative molecular mass containing divalent ion salt；Receive Filter dope is delivered in biogas slurry concentrated solution storage tank 20 or directly derives and makes fertilizer；Nanofiltration permeate through nanofiltration liquid storage tank 14, receive Filtrate high-pressure delivery pump 15 and reverse osmosis membrane apparatus inlet flow gauge 16 are delivered to reverse osmosis membrane enrichment facility 17 further, through anti- Permeable membrane enrichment facility 17 is filtrated to get reverse osmosis permeate and the reverse osmosis containing monovalent ion salt with low-molecular-weight organic matter Dope；Reverse osmosis permeate can be delivered to be used as in water purification storage tank 31 cleaning water of equipment after deamination processes；Reverse osmosis Dope is delivered in biogas slurry concentrated solution storage tank 20 through reverse osmosis membrane enrichment facility concentrated solution discharge meter 18 or directly derives and makes fertilizer Material；Can be made from the nanofiltration dope of biogas slurry nanofiltration device 13 and anti-from reverse osmosis membrane enrichment facility 17 by regulation flow Infiltration dope is mixed to get different biogas slurry concentrated solutions according to different proportion in biogas slurry concentrated solution storage tank 20；Biogas slurry concentrated solution is again It is delivered to multi-effect evaporating device 22 through biogas slurry concentrated solution delivery pump 21 concentrate further；
Biogas slurry concentrated solution concentrates in multi-effect evaporating device 22 and becomes liquid fertilizer and be delivered to organic through multiple-effect evaporation delivery pump 23 Store in concentrating composite liquid fertilizer storage tank 24；Liquid fertilizer in organic concentration composite liquid fertilizer storage tank 24 is carried by liquid fertilizer through connecting pipeline Pump 25 is delivered to liquid fertilizer gravity tank 27 through liquid fertilizer effusion meter 26, and organic concentration composite liquid fertilizer relies on deadweight in liquid fertilizer gravity tank 27 Flow in liquid fertilizer compensator 28, then rely on liquid deadweight to pack in flowing to liquid fertilizer flexible package heat-sealing machine 29；Described liquid fertilizer The outlet at bottom of gravity tank 27 is higher than the upper entrance of liquid fertilizer compensator 28, and the outlet at bottom of liquid fertilizer compensator 28 is soft higher than liquid fertilizer The upper entrance of packaging heat-sealing machine 29.
Liquid fertilizer in organic concentration composite liquid fertilizer storage tank 24 is through connecting pipeline by liquid fertilizer delivery pump 25 through liquid fertilizer effusion meter After 26, can be delivered directly at filling valve to realize barreled and bottled through an other branch line.
In a specific embodiment of the present invention, when the biogas residue of biogas slurry defecator 5 exports and has biogas slurry to flow out, table Drainage screen in bright biogas slurry defecator 5 there occurs blocking, now needs to clean in time, close in advance during cleaning self priming pump 4 and Corresponding control valve carries out reverse cleaning the most again, during reverse cleaning be by high pressure cleaning pump 30 aspirate in water purification storage tank 31 clean Water is supplied to biogas slurry defecator 5 cleans use, through high pressure water purification by passing through connection pipeline and control valve after pressurization again It is transported to sewage treatment plant outside sewage discharge biogas slurry defecator 5 after comprehensive cleaning focus on.
Biogas slurry stock solution storage tank 7, nanofiltration liquid storage tank 14, reverse osmosis membrane enrichment facility 17, biogas slurry concentrated solution storage tank 20, multiple-effect are steamed The cleaning water purification of transmitting apparatus 22, organic concentration composite liquid fertilizer storage tank 24 and liquid fertilizer gravity tank 27 is all that high pressure cleaning pump 30 aspirates Water purification in water purification storage tank 31 is by provide through connection pipeline and control valve after pressurization again, and cleaning sullage all enters dirt Water treatment plant focuses on.
Biogas slurry ultrafiltration apparatus 10 occur whether block be by biogas slurry ultrafiltration apparatus precondition pressure table (not shown in accompanying drawing) and The difference of the rearmounted Pressure gauge of biogas slurry ultrafiltration apparatus (not shown in accompanying drawing) judges, when two Pressure gauges show that difference is more than During 0.3MPa, it is determined that block for biogas slurry ultrafiltration apparatus 10, now need the filtration in back flush biogas slurry ultrafiltration apparatus 10 Medium.During back flush, high pressure cleaning pump 30 aspirate water purification in water purification storage tank 31 by after pressurization again through connection pipeline and Entrance recoils from biogas slurry ultrafiltration apparatus 10 exit to control valve, and porch blowdown, when biogas slurry ultrafiltration apparatus precondition pressure When the difference of table and biogas slurry ultrafiltration apparatus is less than 0.05MPa, it is determined that the blocking for biogas slurry ultrafiltration apparatus has been removed, permissible Carry out normal filtration work.
The blocking decision method of biogas slurry nanofiltration device 13 and back flush method, identical with biogas slurry ultrafiltration apparatus 10.
When reverse osmosis membrane enrichment facility precondition pressure table is less than 0.05M Pa with rearmounted gage pressure display difference, sentence Being set to reverse osmosis membrane enrichment facility 17 to block, need to carry out back flush, high pressure cleaning pump 30 aspirates in water purification storage tank 31 Water purification by pressurization after again through connection pipeline and control valve from reverse osmosis membrane enrichment facility 17 outlet enter, from reverse osmosis The entrance of film condensing device 17 is discharged, and thing is blocked up in the dirt rinsing out membrane component surface.Treat reverse osmosis membrane enrichment facility precondition pressure table During with rearmounted manometric pressure display difference more than 0.25MPa, it is determined that can normally work for rinsing well.
The cleaning sullage of above equipment all enters sewage treatment plant and focuses on.
According to a specific embodiment of the present invention, the reverse osmosis membrane enrichment facility 17 in the present invention is by multiple reverse osmosiss Film post 32 forms.Reverse osmosis membrane post 32 is connected with nanofiltration liquid storage tank 14, from the nanofiltration of nanofiltration liquid storage tank 14 by conveyance conduit Permeate through nanofiltration liquid high-pressure delivery pump 15 and reverse osmosis membrane apparatus inlet flow gauge 16 from the side of this reverse osmosis membrane post 32 Pump into, under pressure sluggish flow filter and shunt in the inner flow passage of reverse osmosis membrane post 32, thus separate Go out permeate and reverse osmosis dope；Through this isolated permeate of reverse osmosis membrane post 32 through reverse osmosis membrane enrichment facility through liquid stream Gauge 19 is also delivered in water purification storage tank 31, as the cleaning water of purging system through conveyance conduit and deamination processing means；And Through this reverse osmosis membrane post 32 isolated reverse osmosis dope through reverse osmosis membrane enrichment facility concentrated solution discharge meter 18 and conveyance conduit It is transported in biogas slurry concentrated solution storage tank 20.
The partial structurtes schematic diagram of the reverse osmosis membrane post in the reverse osmosis membrane enrichment facility that Fig. 3 show in the present invention is (only A pair flow guiding disc 323 and the Multilayer Film 322 wherein clipped are shown).The reverse osmosis membrane post 32 of the present invention can use dish tubular membrane Column assembly realizes, and it specifically includes: shell 321, is made up of fiberglass；Multilayer Film 322, every tunic sheet by resistant to pollution instead Permeable membrane is made；And multiple flow guiding disc 323, it is made up of the high-strength material such as plastics or resin, the plurality of flow guiding disc 323 Each two is formed a pair, and the every pair of flow guiding disc 323 is positive and negative to interlock, and is clipped in wherein by described Multilayer Film 322, in this shell 321 Stacking multipair flow guiding disc 323 from bottom to top, described biogas slurry flows through the multilayer film in described multipair flow guiding disc 323 the most successively Sheet 322, the liquid filtered out by described diaphragm 322 forms permeate, and the liquid being trapped forms reverse osmosis dope, described Cross liquid and flow out this reverse osmosis membrane post 32 via different runners respectively from described reverse osmosis dope.
In the art, dish tubular membrane column assembly is usually used to carry out the process of percolate.It has open Wide runner and the band salient point flow guiding disc of uniqueness, feed liquid forms turbulence state in assembly, decreases film surface knot to the full extent Dirt, pollution and the generation of concentration polarization phenomenon so that even if dish tubular membrane column assembly also can embody under the operation pressure of high pressure Its superior performance.Additionally, dish tubular membrane column assembly can also be prevented effectively from the fouling of film, alleviate fouling membrane degree, make reverse osmosis The life of film, its special construction and Hydraulic design make membrane module be readily cleaned, and after cleaning, flux recovery is the best, from And extend the diaphragm life-span.
This dish tubular membrane column assembly is applied to concentration and the separation of biogas slurry by the present invention, it is possible to obtain good process effect Fruit and the highest treatment effeciency.
Fig. 4 is the structural representation of the multi-effect evaporating device in the present invention, as it can be seen, multi-effect evaporating device 22 includes three Individual evaporator 224 and condenser 228, evaporator 224 is made up of a final stage evaporator and two prime evaporators, each evaporation Steam inlet 222, feed liquid port 223, liquid outlet 229, condensed water discharge outlet 221 and steam (vapor) outlet 225 it is respectively provided with on tank 224, Steam (vapor) outlet 225 is connected by steam pipe 227 with the steam inlet 222 on adjacent next stage evaporator 224, liquid outlet 229 Connecting with the feed liquid port 223 on adjacent next stage evaporator 224, the steam (vapor) outlet 225 of final stage evaporator connects condenser 228, two prime evaporators arrange heater 226 and several heating muff, before heating muff is fixedly mounted on by support On level evaporator, heating muff is arranged on steam pipe 227 periphery, arranges heater strip in heating muff, and heater strip connects heater 226.The steam pipe of feeding secondary steam can be heated by this device, supplements the heat energy that indirect steam scatters and disappears, it is ensured that next The steam thermal energy that level utilizes improves, such that it is able to reduce the usage quantity of evaporator, improves efficiency.Multiple heating muff is used to enter Row heating, can be with stepped heating；Temperature according to indirect steam can regulate and control the quantity of heater strip heating, on-demand heating.
Feed liquid port 223 in the detailed description of the invention of the present invention, on the first order evaporator of multi-effect evaporating device 22 It is connected with biogas slurry concentrated solution storage tank 20 by conveyance conduit and biogas slurry concentrated solution delivery pump 21, accepts in biogas slurry concentrated solution storage tank 20 Biogas slurry concentrated solution be evaporated concentrating, condensed water discharge outlet on three evaporators 221 is by conveyance conduit, and condensed water is defeated Deliver in water purification storage tank 31, can be as the cleaning water of purging system.
In the detailed description of the invention of the present invention, about electric and automatic control scheme, wherein power supply uses 380V three-phase Four line single circuit power supplies, device uses the Parameters Monitoring of PLC+ industrial computer finishing device, shows, accumulates, reports to the police and control, Integration unified management is carried out by centralized control room.And according to process characteristic and safety requirements, to key position each in device, if Put the warning of necessity, automatically controlled and the control facility of automatic interlock parking.
The present invention is additionally provided with sludge-tank, the biogas residue obtained after can be used for storing every one-level processing unit processes and cleaning The mud retained after system.
Additionally, in the detailed description of the invention of the present invention, shown in the device parameter list 1-6 of main building and component:
The relevant parameter of table 1 Factory Building
Project Parameter
Quantity One
Specification 60m×15m×6m
Material Light steel (available old old factory rehabilitation)
The relevant parameter of table 2 regulating reservoir
Project Parameter
Quantity One
Specification Dischargeable capacity 1000m3, 20m × 10m × 6m
Material Steel concrete
Accessory 4 diving mixers
The relevant parameter of table 3 acidizing hydrolyzation tank
Project Parameter
Quantity 1
Specification Dischargeable capacity 80m3, 4m × 4m × 6m
Material Steel concrete
Accessory Containing water-locator, water collection device, 2 diving mixers etc.
The relevant parameter of table 4 nanofiltration liquid storage tank
Project Parameter
Quantity 1
Specification Dischargeable capacity 15m3, 2m × 1.5m × 6m
Material Steel concrete
Accessory Containing steam heater
The relevant parameter of table 5 biogas slurry concentrated solution storage tank
The relevant parameter of table 6 sludge-tank
Project Parameter
Quantity 1
Specification Dischargeable capacity 40m3, 4m × 2m × 6m
Material Steel concrete
The film diameter of the different membrane filtration systems that the present invention uses is different, can realize the ranking score of heterogeneity in biogas slurry From, and then the biogas slurry concentrated solution that different filtration approach obtains can prepare different grades of foliage fertilizer.The present invention is by steaming multiple-effect Send out evaporation technique and membrane filtration technique effectively to combine, it is to avoid the inferior position that membrane separation technique cycles of concentration is little, and multiple-effect evaporation It is to run in the case of temperature is higher, the biological bacteria in biogas slurry is also had the effect of killing so that the preservation bar of final products Part is more loose, need not consider the generation gone bad.Both possessed that membrane separation technique technological process is simple, fluid flowing controllability is strong Advantage, possessing again multiple-effect evaporation can the advantage of Flexible Control cycles of concentration.
The biogas slurry concentrated solution finished product of gained of the present invention is nanoscale organic small-molecule substance, and comprehensive nutrition equalizes, water-soluble Property fabulous, permeability is strong, and activity is high.There is promotion plant root growth, improve root growth environment, activating soil；Enhancing is planted Thing photosynthetic capacity, promotes plant sprouting, young leaves growth, makes leaf color dark green；Promoting flower, alabastrum is full, and uniformly, pattern is bright-coloured；Promote Bear fruit, swollen fruit, coloring mass color is good, mouthfeel is good；Improve plant products, improving quality, raising stress resistance of plant；There is sterilization, drive Worm, effect of minimizing pest and disease damage.
Obviously, above-mentioned embodiment is only for clearly demonstrating example, and not restriction to embodiment. For those of ordinary skill in the field, the change of other multi-form can also be made on the basis of the above description Or variation.Here without also cannot all of embodiment be given exhaustive.And the obvious change thus extended out Or change among still in protection scope of the present invention.

Claims (8)

1. the processing method that a biogas slurry resource concentration and recovery utilizes, it is characterised in that this processing method comprises the following steps:
S1, regulating reservoir process: store in first biogas slurry is delivered to biogas slurry regulating reservoir (1), with arrange in biogas slurry regulating reservoir (1) Biogas slurry is sufficiently stirred for homogenizing by diving mixer, and through filter screen (2), biogas slurry is carried out coarse filtration, with remove in the middle part of biogas slurry sub-sand gravel and The insoluble impurity of bulky grain, is then delivered to pretreatment unit by biogas slurry；
S2, pretreatment: the biogas slurry processed by regulating reservoir carries out acidifying water in being delivered to acidizing hydrolyzation tank (3) after air floatation machine Solve, control temperature and be 25-30 DEG C, macromole in biogas slurry and part solid float are degraded, operates to help later separation；
S3, solid-liquid separation: pretreated biogas slurry is delivered in solid-liquid separation unit and separated further, concentrate, described Solid-liquid separation unit includes self priming pump (4), biogas slurry defecator (5), biogas residue collecting box (6) and biogas slurry stock solution storage tank (7), described Biogas slurry defecator (5) uses inorganic ceramic film as concentration, separates film, organic to the solid float in biogas slurry and macromole Thing intercepts, and the permeate of generation is delivered to biogas slurry stock solution storage tank (7) and enters Multistage Membranes upgrading unit afterwards, the dope of generation or Biogas residue is used for making punching fertilising or solid biologic is fertile；
S4, Multistage Membranes concentration: the biogas slurry operated through pretreatment and solid-liquid separation is delivered to biogas slurry stock solution storage tank (7), Being delivered to biogas slurry ultrafiltration apparatus (10) from biogas slurry stock solution storage tank (7) subsequently and it is carried out hyperfiltration treatment, biogas slurry hyperfiltration treatment uses The mode of continuous concentration, described biogas slurry ultrafiltration apparatus (10) is provided with three grades of ultrafilter membranes, and the concentrated solution by one-level ultrafilter membrane is straight Tap into and continue to concentrate into two-stage ultrafiltering film, enter three grades of ultrafilter membranes by the concentrated solution of two-stage ultrafiltering film and continue to concentrate；Biogas slurry surpasses Filter obtains ultrafiltration permeate and containing solid float and the ultrafiltration dope of larger molecular organics after processing；Described ultrafiltration dope can As punching fertilising；
Ultrafiltration permeate is delivered to biogas slurry nanofiltration device (13) carry out nanofiltration process obtain nanofiltration permeate and containing bivalence from Alite and the relative molecular mass organic nanofiltration dope more than 200；
Nanofiltration permeate is delivered to the reverse osmosis membrane enrichment facility (17) only allowing ammonia nitrogen and water to pass through, obtains reverse osmosis and pass through Liquid and the reverse osmosis dope containing monovalent ion salt with low-molecular-weight organic matter；
Reverse osmosis dope after nanofiltration dope after nanofiltration concentration and reverse osmosis concentration being processed mixes according to different proportion Obtain different biogas slurry concentrated solutions；
Wherein, described biogas slurry ultrafiltration apparatus (10), biogas slurry nanofiltration device (13) and reverse osmosis membrane enrichment facility (17) all use PLC Automatic control unit controls；
S5, multiple-effect evaporation: biogas slurry concentrated solution is delivered to multiple-effect evaporation unit and concentrates further；Described multiple-effect evaporation unit Using triple-effect evaporation plant, wherein 1st effective evaporator control temperature is at 110-130 DEG C, and two effects and triple effect evaporator control temperature and exist 95-105℃；
Biogas slurry concentrated solution, after multiple-effect evaporation unit concentrates and becomes liquid fertilizer, is delivered to organic concentration through multiple-effect evaporation delivery pump (23) Store in composite liquid fertilizer storage tank (24)；
S6, finished product packing: the liquid fertilizer being stored in organic concentration composite liquid fertilizer storage tank (24) after concentrating multiple-effect evaporation wraps Dress；
S7, cleaning and sewage disposal: the evaporation condensate that multiple-effect evaporation processing procedure produces is produced after processing with reverse osmosis concentration Raw permeate carries out deamination process and is delivered to water purification storage tank, can be as the cleaning water of purging system device；Clean each device After sewage enter sewage treatment plant focus on.
The processing method that a kind of biogas slurry resource concentration and recovery the most according to claim 1 utilizes, it is characterised in that described The described ultrafilter membrane of biogas slurry ultrafiltration apparatus (10) uses inorganic ceramic film, and membrane aperture is 100-200nm, membrane flux is 60-65L/ m2.h, transmembrane pressure 0.10-0.20MPa；Described inorganic ceramic film is that multichannel is cylindrical, uses circular or sector channel, film The a length of 1100mm of pipe, membrane tube external diameter is 25-30mm, and effective film area is 0.19m2。
The processing method that a kind of biogas slurry resource concentration and recovery the most according to claim 1 utilizes, it is characterised in that described The aperture of the NF membrane of biogas slurry nanofiltration device (13) is 1-10nm, membrane flux is 40-50L/m2.h, inlet pressure is 1.0- 2.0MPa。
The processing method that a kind of biogas slurry resource concentration and recovery the most according to claim 1 utilizes, it is characterised in that described Reverse osmosis membrane enrichment facility (17) energy effectively catching monovalent ion, makes the deliquescent N in biogas slurry, P, K, micro-element nutrition unit Element is trapped concentration, and the reverse osmosis dope obtained can be used for making high-grade foliage fertilizer, described reverse osmosis membrane enrichment facility (17) Reverse osmosis membrane aperture only allows NH3、H2O passes through, and membrane flux is 35-40L/m2.h, inlet pressure is 2.5-3.5MPa.
5. biogas slurry resource concentration and recovery utilizes a processing system, uses the processing method as described in claim 1-4 is arbitrary, It is characterized in that, including biogas slurry regulating reservoir (1), pretreatment unit, solid-liquid separation unit, Multistage Membranes upgrading unit, multiple-effect evaporation Unit, sewage disposal and cleaning unit, packaging unit and control unit；
Described biogas slurry regulating reservoir (1) is provided with diving mixer and filter screen (2)；
Described pretreatment unit mainly includes air floatation machine and acidizing hydrolyzation tank (3), and described acidizing hydrolyzation tank (3) can destroy in biogas slurry Charge balance, the macromole in biogas slurry and part solid content are degraded, contribute to later separation operation；
Described solid-liquid separation unit includes self priming pump (4), biogas slurry defecator (5), biogas residue collecting box (6) and biogas slurry stock solution storage tank (7), described biogas slurry defecator (5) use inorganic ceramic film as concentrating, separating film, in the biogas slurry after preprocessed Solid float and larger molecular organics intercept；
Described Multistage Membranes upgrading unit includes biogas slurry stock solution delivery pump (8), the biogas slurry stock solution stream being sequentially connected with by conveyance conduit Gauge (9), biogas slurry ultrafiltration apparatus (10), auxiliary delivery pump (11), nanofiltration device inlet flow rate meter (12), biogas slurry nanofiltration device (13), nanofiltration liquid storage tank (14), nanofiltration liquid high-pressure delivery pump (15), reverse osmosis membrane apparatus inlet flow gauge (16), reverse osmosis membrane Enrichment facility (17), reverse osmosis membrane enrichment facility concentrated solution discharge meter (18), reverse osmosis membrane enrichment facility permeate effusion meter And biogas slurry concentrated solution storage tank (20) (19), described Multistage Membranes upgrading unit can retain the material of different molecular weight in biogas slurry respectively, Form different separation gradients, make each section of concentrated solution isolating heterogeneity, can be made into the foliage fertilizer product of multi items；
Described multiple-effect evaporation unit includes biogas slurry concentrated solution delivery pump (21), multi-effect evaporating device (22), multiple-effect evaporation delivery pump (23)；Described multi-effect evaporating device (22) uses two-stage or the vaporizer more than two-stage series connection, can one-level evaporator evaporation be gone out The indirect steam come introduces next stage vaporizer, utilizes it to condense the feed liquid in the energy heats vaporizer released to make full use of Heat energy；
Described sewage disposal and cleaning unit include deamination processing means, high pressure cleaning pump (30) and water purification storage tank (31)；This is single Unit's produced permeate deamination after evaporation condensate Multi-effect Evaporation Processes produced processes with reverse osmosis concentration processes And it is delivered to water purification storage tank (31)；
Described packaging unit includes organic concentration composite liquid fertilizer storage tank (24), liquid fertilizer delivery pump (25), liquid fertilizer effusion meter (26), liquid Fertile gravity tank (27), liquid fertilizer compensator (28) and liquid fertilizer flexible package heat-sealing machine (29), the liquid fertilizer after multiple-effect evaporation is concentrated Pack；
Described control unit is for being controlled Multistage Membranes upgrading unit and multiple-effect evaporation unit；Described control unit includes PLC automatic control unit and electric control unit, wherein, described multiple-effect evaporation unit passes through electric control system, uses existing Field operation controls the mode combined with instrument.
A kind of biogas slurry resource concentration and recovery the most according to claim 5 utilizes processing system, it is characterised in that processing During, first biogas slurry stores in biogas slurry regulating reservoir (1), and the diving mixer arranged in biogas slurry regulating reservoir (1) is by former biogas slurry Coarse filtration is carried out through filter screen (2) after being sufficiently stirred for homogenizing；Then the biogas slurry that regulating reservoir processed is delivered to acid through air floatation machine Acidification hydrolization is carried out in changing hydrolytic tank (3)；Entered in biogas slurry defecator (5) by self priming pump (4) subsequently separated further, Concentrating, the dope of generation and biogas residue flow into biogas residue collecting box (6) and are used for making punching fertilising or solid biologic fertilizer, the permeate of generation Enter biogas slurry stock solution storage tank (7) to deposit；Biogas slurry in biogas slurry stock solution storage tank (7) is former through biogas slurry stock solution delivery pump (8) and biogas slurry Flow meters (9) enters biogas slurry ultrafiltration apparatus (10), obtains ultrafiltration permeate and containing solid float and larger molecular organics Ultrafiltration dope；Ultrafiltration permeate is delivered to biogas slurry nanofiltration dress through auxiliary delivery pump (11) and nanofiltration device inlet flow rate meter (12) Put (13) and carry out nanofiltration process, obtain nanofiltration permeate and containing divalent ion salt and relative molecular mass be more than 200 organic The nanofiltration dope of thing；Nanofiltration dope is delivered in biogas slurry concentrated solution storage tank (20) or directly derives and makes fertilizer；Nanofiltration permeate It is delivered to further through nanofiltration liquid storage tank (14), nanofiltration liquid high-pressure delivery pump (15) and reverse osmosis membrane apparatus inlet flow gauge (16) Reverse osmosis membrane enrichment facility (17), is filtrated to get reverse osmosis permeate and containing monovalent ion through reverse osmosis membrane enrichment facility (17) Salt and the reverse osmosis dope of low-molecular-weight organic matter；Reverse osmosis permeate is delivered to use in water purification storage tank (31) after deamination processes Make the cleaning water of equipment；Reverse osmosis dope is delivered to biogas slurry concentrated solution through reverse osmosis membrane enrichment facility concentrated solution discharge meter (18) In storage tank (20) or directly derive and make fertilizer；By regulation flow make from biogas slurry nanofiltration device (13) nanofiltration dope and come It is mixed to get according to different proportion in biogas slurry concentrated solution storage tank (20) from the reverse osmosis dope of reverse osmosis membrane enrichment facility (17) Different biogas slurry concentrated solutions；Biogas slurry concentrated solution is delivered to multi-effect evaporating device (22) through biogas slurry concentrated solution delivery pump (21) again to be carried out Concentrate further；Biogas slurry concentrated solution concentrates in multi-effect evaporating device (22) becomes liquid fertilizer through multiple-effect evaporation delivery pump (23) conveying Store to organic concentration composite liquid fertilizer storage tank (24)；Liquid fertilizer in organic concentration composite liquid fertilizer storage tank (24) is through connecting pipeline Being delivered to liquid fertilizer gravity tank (27) by liquid fertilizer delivery pump (25) through liquid fertilizer effusion meter (26), organic concentration composite liquid fertilizer is high at liquid fertilizer Rely on deadweight to flow in liquid fertilizer compensator (28) in position tank (27), then rely on liquid deadweight to flow to liquid fertilizer flexible package heat-sealing machine (29) Inside pack.
A kind of biogas slurry resource concentration and recovery the most according to claim 6 utilizes processing system, it is characterised in that You Jinong Liquid fertilizer in contracting composite liquid fertilizer storage tank (24) is by connection pipeline after liquid fertilizer delivery pump (25) and liquid fertilizer effusion meter (26), and warp is another An outer branch line is delivered directly at filling valve to realize barreled and bottled.
8. utilize processing system according to a kind of biogas slurry resource concentration and recovery described in claim 6 or 7, it is characterised in that institute The outlet at bottom of the liquid fertilizer gravity tank (27) stated is higher than the upper entrance of liquid fertilizer compensator (28), the bottom of liquid fertilizer compensator (28) Outlet is higher than the upper entrance of liquid fertilizer flexible package heat-sealing machine (29).
CN201610238912.1A 2016-04-12 2016-04-12 Biogas slurry resource concentration recycling treatment method and system Pending CN105967414A (en)

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CN110002917A (en) * 2019-04-25 2019-07-12 中国科学院广州能源研究所 A kind of preparing process and compounding system of biogas slurry Liquid Fertilizer
CN110117120A (en) * 2019-05-13 2019-08-13 华中农业大学 A kind of reverse osmosis membrane combines the method for concentration biogas slurry with solar energy heating negative pressure evaporation
CN110227352A (en) * 2019-05-29 2019-09-13 河南省图天新能源科技有限公司 A kind of biogas slurry method for concentration based on UF membrane
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CN110117120A (en) * 2019-05-13 2019-08-13 华中农业大学 A kind of reverse osmosis membrane combines the method for concentration biogas slurry with solar energy heating negative pressure evaporation
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