CN105384271B - A kind of biogas slurry concentration and the method and device of product water circulation use - Google Patents

A kind of biogas slurry concentration and the method and device of product water circulation use Download PDF

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Publication number
CN105384271B
CN105384271B CN201510811424.0A CN201510811424A CN105384271B CN 105384271 B CN105384271 B CN 105384271B CN 201510811424 A CN201510811424 A CN 201510811424A CN 105384271 B CN105384271 B CN 105384271B
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hollow fiber
ultrafiltration membrane
fiber ultrafiltration
product water
cleaning
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CN105384271A (en
Inventor
刘伟
陆佳
王欣
徐晓秋
周闯
潘良
杨光
苏小红
郭广亮
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Energy and Environment Research Institute of Heilongjiang Province
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Energy and Environment Research Institute of Heilongjiang Province
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/16—Use of chemical agents
    • B01D2321/162—Use of acids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/16—Use of chemical agents
    • B01D2321/164—Use of bases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/16—Use of chemical agents
    • B01D2321/168—Use of other chemical agents
    • 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
    • C02F1/44—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

Abstract

A kind of biogas slurry concentration and the method and device of product water circulation use, it is related to a kind of biogas slurry concentration and the method and device of product water circulation use.The present invention is to solve existing ultrafiltration membrane treatment process cost height, fouling membrane are serious, the incomplete problem of waste water utilization is cleaned.It includes biogas slurry preprocessing process, biogas slurry ultrafiltration membrane treatment process and membrane cleaning process.Patent of the present invention is made full use of to obtained biogas residue, concentrate, product water, and particularly product water is recycled, and realizes the recycling treatment of biogas slurry, reduces biogas slurry treatment cost, reduces the pollution to environment.Applied to biogas slurry treatment field.

Description

A kind of biogas slurry concentration and the method and device of product water circulation use
Technical field
The present invention relates to a kind of concentration of biogas slurry and the method and device of product water circulation use, belong to agriculture field discarded object Resource recycling utilizes field.
Background technology
With China's animal husbandry scale, the raising of intensive degree, the total release of livestock and poultry feces is also passed year by year therewith Increase, have a strong impact on the living environment of resident, be detrimental to health.In recent years, livestock and poultry feces are controlled using anaerobic fermentation technology Biogas work receive the extensive concern of people.Although the gas that continues is a kind of convenience, the energy of cleaning, it can both alleviate energy pressure Power, can improve environment again, but produced therewith in production process of methane nitrogen in substantial amounts of biogas residue, biogas slurry, biogas slurry, phosphorus, The organic contamination such as COD, BOD and SS content is still very high, it is impossible to meet the requirement directly discharged, and biogas slurry utilization rate is not enough 30%, biogas slurry whereabouts becomes new problem.Biogas slurry contains the battalion such as abundant organic matter, humic acid, nitrogen, phosphorus, potassium, trace element The life active compound such as part and amino acid, vitamin, enzyme is formed, high-quality and efficient organic fertilizer can be used as.However, biogas slurry is foster Divide content too low, 95% above is moisture, causes packaging and cost of transportation high, be unsuitable for commercial requirements.Due in biogas slurry Conventional nutrients molecular mass it is larger, so it is direction that concentration is compared in current research that biogas slurry, which is concentrated, using milipore filter.
At present, biogas slurry treatment concentration flow path：Biogas slurry is after the unit operation such as precipitation, filtering using at milipore filter concentration Reason.The problem of existing be：(1) not complete enough is utilized to biogas slurry；(2) what preprocessing process was done is not perfect enough, careful, causes film dirty Dye is serious, and cost is higher；(3) pretreated filter medium cleaning needs substantial amounts of water, and filtering material is single；(4) film Cleaning module is complicated, and the liquid after Chemical cleaning causes medicament to waste using insufficient.These influence the effect that biogas slurry is concentrated Really, processing cost is added, the engineering development of film process biogas slurry is constrained.Therefore, developing intellectual resource, efficient biogas slurry concentration, The method and device that product water is utilized with waste liquid circulation after cleaning in Membrane cleaning module is particularly important.
The content of the invention
Utilized it is an object of the invention to provide cleaning waste liquid circulation in a kind of concentration of biogas slurry, product water and Membrane cleaning module Method and device, this method and apparatus solves existing ultrafiltration membrane treatment process cost height, fouling membrane seriously, cleans waste water utilization Incomplete problem.
A kind of biogas slurry concentration of the present invention and the method for product water circulation use, detailed process are as follows：
First, biogas slurry preprocessing process：Biogas slurry in biogas slurry holding vessel carries out thick mistake through being pumped into 5mm granular membranes Filter；Biogas slurry after coarse filtration, which enters in horizontal centrifuge, to be centrifuged, and obtains the solid portion and liquid portion of biogas residue；Liquid portion is passed through Pump is delivered to the one or more medium filters two of more medium filter, then in straw filtering device one or straw filtering device two, obtains Pre-process biogas slurry；
2nd, hollow fiber ultrafiltration membrane processing procedure：The preprocessed obtained biogas slurry of step one is directed into doughnut to surpass Concentration is carried out in filter membrane one or hollow fiber ultrafiltration membrane two, wherein, two hollow fiber ultrafiltration membranes one or doughnut are super The film average pore size of the membrane module of filter membrane two is 0.003 μm~0.01 μm；Pass through hollow fiber ultrafiltration membrane one or doughnut Milipore filter two processing after concentrate be delivered to concentration liquid storage tank in, concentrate partial reflux enter hollow fiber ultrafiltration membrane one or The circular treatment of hollow fiber ultrafiltration membrane two, after another part is excluded through electromagnetic valve 21, collection is used as liquid fertilizer；Its In, the product water of hollow fiber ultrafiltration membrane one or hollow fiber ultrafiltration membrane two is by being arranged on and hollow fiber ultrafiltration membrane one side Dump valve two, the dump valve four of dump valve three or hollow fiber ultrafiltration membrane two side faces, dump valve five product water out conveying Into product pond, after collection is sterile-processed, is discharged or recycled；
3rd, hollow fiber ultrafiltration membrane cleaning process：Product water of the step 2 through collection is prepared into three kinds of different chemistry clear Washing lotion, three kinds of different chemical cleaning solutions are respectively that mass concentration is 0.5%~0.8% citric acid cleaning liquid, and it is 2 to control its pH ~4；200mg/L~500mg/L NaOH cleaning fluids, it is 10~12 to control its pH；200mg/L~300mg/L NaClO cleanings Liquid；
Cleaning process is：
(1) soaking and washing is carried out first：
To the soaking and washing of hollow fiber ultrafiltration membrane one：
First electromagnetic valve six and electromagnetic valve 22 are closed, and the inlet solenoid valve eight of hollow fiber ultrafiltration membrane two is closed Close, citric acid cleaning liquid, NaOH cleaning fluids and NaClO cleaning fluids are then injected into hollow fiber ultrafiltration membrane one through pump successively In, then by electromagnetic valve seven, drain valve two, drain valve three, drain valve seven and the Close All of drain valve eight, to Hollow Fiber Ultrafiltration After the sealing of film one immersion 0.5~2 hour, vent valves seven, vent valves six and electromagnetic valve seven are opened, by the liquid after cleaning It is discharged to medicament and recycles case, then the product water collected with step 2 is rinsed well；
Or to the soaking and washing of hollow fiber ultrafiltration membrane two：
First electromagnetic valve six and electromagnetic valve 22 are closed, and the He of one inlet solenoid valve of hollow fiber ultrafiltration membrane seven Outlet drain valve seven is closed, and is then successively injected into citric acid cleaning liquid, NaOH cleaning fluids and NaClO cleaning fluids through pump hollow Fiber ultrafiltration membrane, by electromagnetic valve eight, drain valve four, drain valve five and the Close All of drain valve six, to hollow fiber ultrafiltration membrane After sealing immersion 0.5~2 hour, then discharge valve six and electromagnetic valve eight are opened, the liquid after cleaning is discharged into medicament follows Ring utilizes case, then the product water collected with step 2 to rinse well；
(2) secondly, wash cycles are carried out：
To the wash cycles of hollow fiber ultrafiltration membrane one：
First electromagnetic valve six and electromagnetic valve 22 are closed, the dump valve eight of two dump valve of dump valve three is turned off by The inlet solenoid valve door eight of fibre ultrafiltration film two, then will be injected into hollow fiber ultrafiltration membrane one by chemical cleaning solution through pump In, the pressure stability of hollow fiber ultrafiltration membrane one is adjusted to 0.1~0.25Mpa, and the medicament after cleaning is through dump valve seven and discharge Valve six is discharged into medicament and recycles case, each wash cycles 10~40 minutes；Wherein, the injection order of chemical cleaning solution is： Product water-citric acid cleaning liquid-product water-NaOH cleaning fluids-product water-NaClO solution-product water；Described product water is The product water that step 2 is collected；
Or to the wash cycles of hollow fiber ultrafiltration membrane two：
First electromagnetic valve six and electromagnetic valve 22 are closed, the inlet solenoid valve of hollow fiber ultrafiltration membrane one door is turned off 7th, dump valve seven and dump valve eight, beat the inlet solenoid valve door eight and dump valve six of hollow fiber ultrafiltration membrane two, close dump valve Four and dump valve five；Chemical cleaning solution is injected into hollow fiber ultrafiltration membrane two through pump, the pressure of hollow fiber ultrafiltration membrane is adjusted Power is stable to 0.1~0.25Mpa, and the medicament after cleaning enters medicament through dump valve six and recycles case, each wash cycles 10~40 minutes；Wherein, the injection order of chemical cleaning solution is：Product water-citric acid cleaning liquid-product water-NaOH cleaning fluids- Product water-NaClO solution-product water；Described product water is the product water that step 2 is collected；
(3) finally carry out that milipore filter is counter cleans：
Hollow fiber ultrafiltration membrane one is instead cleaned：
Electromagnetic valve six, electromagnetic valve seven, electromagnetic valve eight and electromagnetic valve 22 are closed, while opening drain valve two With drain valve three；And close drain valve four, drain valve five and drain valve eight, while vent valves seven and vent valves six are opened, Then chemical cleaning solution is injected into hollow fiber ultrafiltration membrane one through pump, adjust the pressure stability of hollow fiber ultrafiltration membrane one to 0.1~0.25Mpa, the medicament after cleaning is discharged into medicament and recycles case through vent valves seven and vent valves six, anti-every time Cleaning 10~40 minutes；Complete described hollow fiber ultrafiltration membrane cleaning；Wherein, the injection order of chemical cleaning solution is：Production Product water-citric acid cleaning liquid-product water-NaOH cleaning fluids-product water-NaClO solution-product water；Described product water is step Rapid two product waters collected；
Or hollow fiber ultrafiltration membrane two is instead cleaned：
Electromagnetic valve six, electromagnetic valve seven, electromagnetic valve eight and electromagnetic valve 22 are closed, while opening drain valve 4th, drain valve five and vent valves six, and drain valve two, drain valve three and vent valves seven are closed, by chemical cleaning solution through pump Two hollow fiber ultrafiltration membranes are injected into, the pressure of regulation hollow fiber ultrafiltration membrane two is stablized to 0.1~0.25Mpa, cleaning Medicament afterwards is discharged into medicament and recycles case through vent valves six, every time anti-cleaning 10~40 minutes；In described in completing Fibre ultrafiltration Membrane cleaning；Wherein, the injection order of chemical cleaning solution is：Product water-citric acid cleaning liquid-product water-NaOH Cleaning fluid-product water-NaClO solution-product water；Described product water is the product water that step 2 is collected；
Wherein, it is to prepare completion by cleaning dosing tank that the chemical cleaning solution described in step 3 kind, which is prepared,.
General introduction is carried out with reference to Fig. 1 with product water circulation utilization method to the biogas slurry concentration of the present invention to be described as follows：
A kind of concentration of biogas slurry and the method for product water circulation use of the present invention, this method include biogas slurry preprocessing process, The cleaning process of hollow fiber ultrafiltration membrane processing procedure and hollow fiber ultrafiltration membrane film, detailed process is as follows：
First, biogas slurry preprocessing process：Biogas slurry in biogas slurry holding vessel carries out coarse filtration through being pumped into granular membrane, Bulky grain solid and part biogas residue in removal biogas slurry etc..Biogas slurry after coarse filtration, which enters in horizontal centrifuge, to be centrifuged, consolidate Body portion biogas residue and liquid portion.Liquid portion is delivered to more medium filter and straw filtering device through pump, obtains pre-processing natural pond Liquid；
The solid (i.e. tiny biogas residue and impurity) that coarse filtration and centrifugation are obtained in above-mentioned processing procedure is after collection, by warp Crossing certain proportioning can use as compound fertilizer raw material；
Filtrate in described processing procedure in straw filtering device is that average grain diameter is 1-2mm stalks, with 0.2mol/L- Neutrality is cleaned to after 2mol/L dipping by lye 24-48h, filling is compacted after drying；
More medium filter lower floor is particle diameter 3-5mm lightweight ANTHRACITE FILTER MEDIA in described processing procedure, and middle level is 0.4-0.45mm particle diameter quartz sand filter medias, upper strata is 0.2-0.4mm particle diameter walnut shell filtering materials；
Filtrate in described processing procedure in straw filtering device terminates to rinse in filtering, can be directly as fermentation Raw material is put into anaerobic fermentation tank；
2nd, ultrafiltration membrane treatment process：Step is subjected to milipore filter concentration once the biogas slurry that preprocessing process is obtained, led to The concentrate crossed after ultrafiltration membrane treatment is delivered to concentration liquid storage tank, and concentrate partial reflux enters milipore filter circular treatment, one The allotment of lease making suitably is used as liquid fertilizer；Product water (i.e. permeate) discharge or circulation profit after collecting and disinfecting With.
Concentration uses hollow fiber ultrafiltration membrane in described processing procedure, described polysulfone hollow fiber ultrafiltration membrane system Film average pore size is 0.003 μm -0.01 μm, and the pH scope of applications are 1~13；Temperature applicable range is 5 DEG C -45 DEG C；
3rd, hollow fiber ultrafiltration membrane cleaning process：Product water of the step 2 through collection is prepared into three kinds of different chemistry clear Washing lotion, three kinds of different chemical cleaning solutions are respectively that mass concentration is 0.5%-0.8% citric acid cleaning liquid, and it is 2- to control its pH 4；200mg/L-500mg/L NaOH cleaning fluids, it is 10-12 to control its pH；200mg/L-300mg/L NaClO cleaning fluids；Clearly Washed journey is：
Soaking and washing is carried out first：Citric acid cleaning liquid is injected after milipore filter that water intaking valve, drain valve and regulating valve is complete Portion is closed, and is rinsed well again with product water after being soaked 0.5~2 hour to milipore filter sealing.NaOH cleaning fluids are injected into milipore filter Afterwards by water intaking valve, drain valve and regulating valve Close All, rinsed again with product water after being soaked 0.5~2 hour to milipore filter sealing Totally.NaClO cleaning fluids are injected water intaking valve, drain valve and regulating valve Close All after milipore filter, milipore filter is sealed and soaked Bubble is rinsed well with product water again after 0.5~2 hour.
Secondly wash cycles are carried out：By configured three kinds of chemical cleaning solutions, after elder generation through pump at the water intaking valve of milipore filter Injection, production water valve is closed, and regulation drain valve is by pressure stability in 0.1~0.25Mpa, and cleaning every time is needed 10~40 minutes, will be super Washing lotion in filter membrane is rinsed well.The cleaning sequence of chemical is in above-mentioned processing procedure：Product water-citric acid cleaning Liquid-product water-NaOH cleaning fluid-product water-NaClO solution-product water, what described product water was collected for step 2 Product water；
Finally carry out the anti-cleaning of milipore filter：Successively three kinds of different cleaning fluids are noted at the outlet valve of milipore filter through pump Enter, adjusting water outlet valve is by pressure stability in 0.1~0.25Mpa, and cleaning every time is needed 10~40 minutes, and the washing lotion in milipore filter is rushed Wash clean.The cleaning sequence of chemical is in above-mentioned anti-cleaning process：Product water-citric acid cleaning liquid-product water- NaOH cleaning fluid-product water-NaClO solution-product water.
Three kinds of different chemical cleaning solutions after described hollow fiber ultrafiltration membrane cleaning are reclaimed and detected, pH value with it is original The pH value for the three kinds of different cleaning fluids prepared is respectively compared, and pH value difference is less than 1, carries out 2 utilizations, and pH value difference is more than 1, will It is injected into two more medium filters through pump, is carried out Chemical cleaning to two more medium filters, is taken full advantage of chemistry Cleaning agent and product water, the utilization rate of cleaning fluid are improved, it is to avoid medicament is wasted.
The present invention also provides a kind of concentration of biogas slurry and the device of product water circulation use, it include biogas slurry pretreatment unit, Biogas slurry ultrafiltration membrane treatment unit and Membrane cleaning construction unit；
Described biogas slurry pretreatment unit includes biogas slurry coarse filtration unit and the smart filter element of biogas slurry；Wherein, the thick mistake of biogas slurry Filtering unit includes biogas slurry holding vessel, raw liquor pump, granular membrane and horizontal centrifuge；Biogas slurry essence filter element includes pump, many Jie Mass filter one, more medium filter two, straw filtering device one and straw filtering device two；
Described biogas slurry ultrafiltration membrane treatment unit includes hollow fiber ultrafiltration membrane one, hollow fiber ultrafiltration membrane two and concentrate Storage tank；
Described Membrane cleaning construction unit includes cleaning dosing tank, medicament and recycles case and product pond；
The biogas slurry outlet of described biogas slurry holding vessel is connected with the inlet of raw liquor pump, and raw liquor pump passes through pipeline and screen cloth mistake The inlet connection of filter, the outlet of granular membrane and the inlet communication of horizontal centrifuge, the liquid outlet of horizontal centrifuge Connected with the inlet of pump；Lower end inlet communication of the pump discharge by pipeline respectively with two more medium filters, in multimedium Electromagnetic valve two and electromagnetic valve three are respectively arranged with pipeline at the lower end import of filter one and more medium filter two, The outlet of more medium filter one and the upper end of more medium filter two passes through pipeline and straw filtering device one and straw filtering device two Upper end inlet communication, be respectively arranged with electromagnetism on the pipeline at straw filtering device one and the upper end import of straw filtering device two Valve four and electromagnetic valve five；
Described straw filtering device one and the outlet of the lower end of straw filtering device two are connected with the one end of electromagnetic valve six, electromagnetism The other end of valve six respectively with hollow fiber ultrafiltration membrane one and the inlet communication of the lower end of hollow fiber ultrafiltration membrane two, and and medicament The inlet communication of case is recycled, while connecting the liquid outlet of concentration liquid storage tank；Case is recycled in electromagnetic valve six and medicament Import between be disposed with flowmeter one and electromagnetic valve 18；
Wherein, row of the import in product pond with being arranged on hollow fiber ultrafiltration membrane one and hollow fiber ultrafiltration membrane two side faces Valve two, vent valves three, vent valves four are put to connect with vent valves five；The delivery port in product pond respectively with electromagnetic valve 15 one end and the connection of the one end of electromagnetic valve 16；The other end and atmosphere of electromagnetic valve 15, electromagnetic valve 16 The other end is connected with one end of electromagnetic valve 17 and the product water lines water inlet of cleaning dosing tank respectively；Electromagnetic valve 17 The other end connected respectively with the import of pump and the liquid outlet of upper medicament liquid reserve tank；The outlet of pump respectively with more medium filter one And lower end import and the outlet of pump of more medium filter two；
Wherein, cleaning dosing tank is by product water lines, liquid feeding bucket, scalable air bag, pickling liquid case, alkali cleaning liquid case, secondary chlorine Sour sodium washing lotion case and product water lotion case is constituted；Described product water pipe water outlet is connected with the water inlet of liquid feeding bucket, liquid feeding Bucket is connected by spring with scalable air bag, and the air inlet of scalable air bag is connected with nine one end of air inlet electromagnetic valve door, magnetic valve Nine other ends of door and atmosphere, flowmeter four, electromagnetism are provided between the air inlet and electromagnetic valve nine of scalable air bag The air inlet and the outlet of flowmeter four of the import of valve ten respectively with scalable air bag；The bottom cleaned in dosing tank is set There are pickling liquid case, alkali cleaning liquid case, sodium hypochlorite washing lotion case and product water lotion case；Described pickling liquid case, alkali cleaning liquid case, secondary chlorine Sour sodium washing lotion case and product water lotion case passes through electromagnetic valve 11, electromagnetic valve 12, electromagnetic valve 13 and electromagnetism respectively Valve 14 is connected with the water inlet of pump, the delivery port of pump respectively with hollow fiber ultrafiltration membrane one and hollow fiber ultrafiltration membrane two The import at end and the inlet communication in product pond, while recycling the inlet communication of case with medicament；
Described medicament recycles case and is made up of upper medicament liquid reserve tank and lower medicament liquid reserve tank；Wherein, upper medicament liquid-storage The liquid outlet of case is connected with the inlet of lower medicament liquid reserve tank and the inlet of pump and the one end of electromagnetic valve 15 respectively；Lower medicament The liquid outlet of liquid reserve tank is connected with the inlet of pump；Between the inlet of the liquid outlet of upper medicament liquid reserve tank and lower medicament liquid reserve tank It is provided with electromagnetic valve 19；Described medicament recycles import and hollow fiber ultrafiltration membrane one and the Hollow Fiber Ultrafiltration of case The liquid outlet connection of the upper end of film two；Wherein, the liquid outlet of hollow fiber ultrafiltration membrane one and the upper end of hollow fiber ultrafiltration membrane two The import of concentration liquid storage tank is connected simultaneously.
The present invention includes following beneficial effect：
1st, the present invention is made full use of to obtained biogas residue, concentrate, product water, and particularly product water is recycled, real Show the recycling treatment of biogas slurry, reduced biogas slurry treatment cost, reduce the pollution to environment.
2nd, preprocessing process of the invention, is conducive to follow-up film process biogas slurry, reduces fouling membrane degree, extend film Service life.
3rd, cleaning dosing tank of the invention realizes automatic preparation cleaning fluid, it is to avoid people prepares the danger that cleaning agent is brought, Reduce labor intensity.
4th, the cleaning module of film is simple in the present invention, and the liquid after Chemical cleaning is using fully, and the utilization rate of cleaning fluid is carried Height, it is cost-effective, promote the engineering development of film process biogas slurry.
5th, heretofore described method is all handled the processing of biogas slurry using physical operations, it is to avoid chemical Treatment Destruction to biogas slurry nutriment, high treating effect, product water can qualified discharge.
6th, straw filtering device uses the stalk that oxygenation pretreatment is crossed, advantages of good adsorption effect in the present invention, and stalk is cheap and easy to get. It need not be rinsed after biogas slurry filtering and can be directly used as fermentation raw material, realize recycling for stalk.
Brief description of the drawings
Fig. 1 is flow chart of the invention；
Fig. 2 is the structural representation of apparatus of the present invention.
Embodiment
Embodiment one：Illustrate present embodiment, a kind of concentration of biogas slurry and the production of present embodiment with reference to Fig. 1 and 2 The method of product water circulation use, detailed process is as follows：
First, biogas slurry preprocessing process：Biogas slurry in biogas slurry holding vessel 1 is transported to progress in 5mm granular membranes 3 through pump 2 Coarse filtration；Biogas slurry after coarse filtration, which enters in horizontal centrifuge 4, to be centrifuged, and obtains the solid portion and liquid portion of biogas residue；Liquid Part is delivered to the 8-1 of more medium filter one or the 8-2 of more medium filter two, and the 9-1 of straw filtering device one or stalk through pump 5 In the 9-2 of filter two, obtain pre-processing biogas slurry；
2nd, hollow fiber ultrafiltration membrane processing procedure：The preprocessed obtained biogas slurry of step one is directed into doughnut to surpass Concentration is carried out in the 10-1 of filter membrane one or the 10-2 of hollow fiber ultrafiltration membrane two, wherein, two 10-1 of hollow fiber ultrafiltration membrane one Or the film average pore size of the 10-2 of hollow fiber ultrafiltration membrane two membrane module is 0.003 μm~0.01 μm；It is super by doughnut Concentrate after the 10-1 of the filter membrane one or 10-2 of hollow fiber ultrafiltration membrane two processing is delivered in concentration liquid storage tank 11, concentrate part The 10-1 of hollow fiber ultrafiltration membrane one or the 10-2 circular treatments of hollow fiber ultrafiltration membrane two are flowed back into, another part is through electromagnetic valve After 21 15-21 are excluded, collection is used as liquid fertilizer；Wherein, the 10-1 of hollow fiber ultrafiltration membrane one or hollow fiber ultrafiltration membrane Two 10-2 product water is by being arranged on the 17-2 of dump valve two, the 17-3 of dump valve three with the 10-1 sides of hollow fiber ultrafiltration membrane one Or the 17-4 of dump valve four, the 17-5 of the dump valve five product water out of the 10-2 sides of hollow fiber ultrafiltration membrane two are delivered to product water In pond 14, after collection is sterile-processed, is discharged or recycled；
3rd, hollow fiber ultrafiltration membrane cleaning process：Product water of the step 2 through collection is prepared into three kinds of different chemistry clear Washing lotion, three kinds of different chemical cleaning solutions are respectively that mass concentration is 0.5%~0.8% citric acid cleaning liquid, and it is 2 to control its pH ~4；200mg/L~500mg/L NaOH cleaning fluids, it is 10~12 to control its pH；200mg/L~300mg/L NaClO cleanings Liquid；
Cleaning process is：
(1) soaking and washing is carried out first：
To the 10-1 soaking and washings of hollow fiber ultrafiltration membrane one：
First the 15-6 of the electromagnetic valve six and 15-22 of electromagnetic valve 22 is closed, and the 10-2 of hollow fiber ultrafiltration membrane two The 15-8 of inlet solenoid valve eight is closed, and then successively injects citric acid cleaning liquid, NaOH cleaning fluids and NaClO cleaning fluids through pump 17 Into the 10-1 of hollow fiber ultrafiltration membrane one, then by the 15-7 of electromagnetic valve seven, the 17-2 of drain valve two, the 17-3 of drain valve three, drain valve Seven 17-7 and the 17-8 Close Alls of drain valve eight, after the 10-1 of hollow fiber ultrafiltration membrane one sealings immersion 0.5~2 hour, are opened The 17-7 of vent valves seven, the 17-6 of vent valves six and the 15-7 of electromagnetic valve seven, medicament circulation profit is discharged to by the liquid after cleaning Rinsed well with case 13, then the product water collected with step 2；
Or to the 10-2 soaking and washings of hollow fiber ultrafiltration membrane two：
First the 15-6 of the electromagnetic valve six and 15-22 of electromagnetic valve 22 is closed, and the 10-1 of hollow fiber ultrafiltration membrane one The 15-7 of inlet solenoid valve seven and the 17-7 of outlet drain valve seven are closed, then successively by citric acid cleaning liquid, NaOH cleaning fluids and NaClO cleaning fluids are injected into hollow fiber ultrafiltration membrane 10-2 through pump 17, by the 15-8 of electromagnetic valve eight, the 17-4 of drain valve four, discharge The 17-5 of valve five and the 17-6 Close Alls of drain valve six, after hollow fiber ultrafiltration membrane 10-2 sealings immersion 0.5~2 hour, then beat The 17-6 of discharge valve six and the 15-8 of electromagnetic valve eight are opened, the liquid after cleaning is discharged into medicament recycles case 13, then with step Rapid two product waters collected are rinsed well；
(2) secondly, wash cycles are carried out：
To the 10-1 wash cycles of hollow fiber ultrafiltration membrane one：
First the 15-6 of the electromagnetic valve six and 15-22 of electromagnetic valve 22 is closed, the 17-2 dump valves of dump valve two are turned off The 17-8 of three 17-3 dump valves eight, will and then will be chemical clear by the 10-2 of hollow fiber ultrafiltration membrane two inlet solenoid valve eight 15-8 of door Washing lotion is injected into the 10-1 of hollow fiber ultrafiltration membrane one through pump 17, regulation hollow fiber ultrafiltration membrane one 10-1 pressure stability to 0.1~0.25Mpa, the medicament after cleaning is discharged into medicament through the 17-7 of dump valve seven and the 17-6 of dump valve six and recycles case 13, Each wash cycles 10~40 minutes；Wherein, the injection order of chemical cleaning solution is：Product water-citric acid cleaning liquid-product Water-NaOH cleaning fluids-product water-NaClO solution-product water；Described product water is the product water that step 2 is collected；
Or to the 10-2 wash cycles of hollow fiber ultrafiltration membrane two：
First the 15-6 of the electromagnetic valve six and 15-22 of electromagnetic valve 22 is closed, the 10- of hollow fiber ultrafiltration membrane one is turned off 1 inlet solenoid valve door, seven 15-7, the 17-7 of dump valve seven and the 17-8 of dump valve eight, beat the 10-2 of hollow fiber ultrafiltration membrane two entrance electricity The magnet valve door eight 15-8 and 17-6 of dump valve six, close the 17-4 of the dump valve four and 17-5 of dump valve five；By chemical cleaning solution through pump 17 It is injected into the 10-2 of hollow fiber ultrafiltration membrane two, adjusts hollow fiber ultrafiltration membrane 10-2 pressure stability to 0.1~0.25Mpa, Medicament after cleaning enters medicament through the 17-6 of dump valve six and recycles case 13, each wash cycles 10~40 minutes；Wherein, Chemical cleaning solution injection order be：Product water-citric acid cleaning liquid-product water-NaOH cleaning fluids-product water-NaClO is molten Liquid-product water；Described product water is the product water that step 2 is collected；
(3) finally carry out that milipore filter is counter cleans：
It is counter to the 10-1 of hollow fiber ultrafiltration membrane one to clean：
Close the 15-6 of electromagnetic valve six, the 15-7 of electromagnetic valve seven, the 15-8 of electromagnetic valve eight and the 15- of electromagnetic valve 22 22, while opening the 17-2 of the drain valve two and 17-3 of drain valve three；And close the 17-4 of drain valve four, the 17-5 of drain valve five and drain valve Eight 17-8, while the 17-7 of the vent valves seven and 17-6 of vent valves six is opened, during then chemical cleaning solution is injected into through pump 17 The 10-1 of fibre ultrafiltration film one, regulation hollow fiber ultrafiltration membrane one 10-1 pressure stability is to 0.1~0.25Mpa, after cleaning Medicament is discharged into medicament and recycles case 13 through the 17-7 of vent valves seven and the 17-6 of vent valves six, every time anti-cleaning 10~40 Minute；Complete described hollow fiber ultrafiltration membrane 10-1 cleanings；Wherein, the injection order of chemical cleaning solution is：Product water-lemon Lemon acid cleaning fluid-product water-NaOH cleaning fluids-product water-NaClO solution-product water；Described product water is collected for step 2 Product water；
Or cleaned to the 10-2 of hollow fiber ultrafiltration membrane two is counter：
Close the 15-6 of electromagnetic valve six, the 15-7 of electromagnetic valve seven, the 15-8 of electromagnetic valve eight and the 15- of electromagnetic valve 22 22, while opening the 17-4 of drain valve four, the 17-5 of drain valve five and the 17-6 of vent valves six, and close the 17-2 of drain valve two, discharge The 17-3 of the valve three and 17-7 of vent valves seven, two hollow fiber ultrafiltration membrane 10-2 are injected into by chemical cleaning solution through pump 17, regulation The 10-2 of hollow fiber ultrafiltration membrane two pressure is stablized to 0.1~0.25Mpa, the medicament after cleaning through the 17-6 of vent valves six, It is discharged into medicament and recycles case 13, every time anti-cleaning 10~40 minute；Complete described hollow fiber ultrafiltration membrane 10-2 clear Wash；Wherein, the injection order of chemical cleaning solution is：Product water-citric acid cleaning liquid-product water-NaOH cleaning fluid-product waters- NaClO solution-product water；Described product water is the product water that step 2 is collected；
Wherein, it is to prepare completion by cleaning dosing tank 12 that the chemical cleaning solution described in step 3 kind, which is prepared,.
The solid (i.e. tiny biogas residue and impurity) that coarse filtration and centrifugation in present embodiment biogas slurry preprocessing process are obtained After collection, it can be used by certain proportioning as compound fertilizer raw material.Filtrate in straw filtering device terminates not in filtering Need to rinse, put into anaerobic fermentation tank and ferment directly as fermentation raw material.
Pass through nitrogen, phosphorus, potassium and the micro member of organic matter in the concentrate after present embodiment hollow fiber ultrafiltration membrane film process The nutritional ingredient such as element concentration improves 4 times, and product water CODCr clearance is up to 99.2%.
Embodiment two：Illustrate present embodiment with reference to Fig. 1 and 2, present embodiment and embodiment one are not Be：It is that the medicament after the 10-1 of the hollow fiber ultrafiltration membrane one or 10-2 of hollow fiber ultrafiltration membrane two cleanings is reclaimed and examined Survey, pH value and the pH value of the chemical cleaning solution of original preparation are respectively compared, pH value difference is less than 1, carry out 2 utilizations, difference in pH Value is more than 1, it is injected into the 8-1 of more medium filter one or the 8-2 of more medium filter two through pump, to more medium filter one The 8-1 or 8-2 of more medium filter two carries out Chemical cleaning.It is other identical with embodiment one.
Embodiment three：Illustrate present embodiment with reference to Fig. 1 and 2, present embodiment and embodiment one are not Be：The biogas residue that granular membrane 3 and horizontal centrifuge 4 are obtained after handling as compound fertilizer raw material.It is other with it is specific Embodiment one is identical.
Embodiment four：Illustrate present embodiment with reference to Fig. 1 and 2, present embodiment and embodiment one are not It is with putting：The 8-1 of more medium filter one and the 8-2 of more medium filter two lower floor are 3~5mm of particle diameter lightweight anthracite Filtrate, middle level is 0.4~0.45mm particle diameter quartz sand filter medias, and upper strata is 0.2~0.4mm particle diameter walnut shell filtering materials.It is other Composition and connected mode are identical with embodiment one.
Embodiment five：Illustrate present embodiment with reference to Fig. 1 and 2, present embodiment and embodiment one are not It is with putting：The 9-1 of straw filtering device one and the 9-2 of straw filtering device two filtrate is：It is 1mm stalks by average grain diameter, uses After 1.5mol/L dipping by lye 36h, cleaning is neutral to pH, is compacted after drying, as filtrate.It is other composition and connected mode and Embodiment one is identical.
Embodiment six：Illustrate present embodiment with reference to Fig. 1 and 2, present embodiment and embodiment one are not It is with putting：The 10-1 of hollow fiber ultrafiltration membrane one and the 10-2 of hollow fiber ultrafiltration membrane two membrane module material are polypropylene PP, Film average pore size is 0.003 μm~0.01 μm, and the pH scope of applications are 1~13, and temperature applicable range is 5 DEG C~45 DEG C.It is other Composition and connected mode are identical with embodiment one.
Embodiment seven：Illustrate present embodiment with reference to Fig. 1 and 2, present embodiment and embodiment one are not It is with putting：Gas in scalable air bag (12-3) is the CO that methane purification comes out2.It is other composition and connected mode with specifically Embodiment one is identical.
Embodiment eight：Illustrate present embodiment, a kind of biogas slurry concentration of present embodiment and product water with reference to Fig. 2 The device recycled, it includes biogas slurry pretreatment unit, biogas slurry ultrafiltration membrane treatment unit and Membrane cleaning construction unit；
Described biogas slurry pretreatment unit includes biogas slurry coarse filtration unit and the smart filter element of biogas slurry；Wherein, the thick mistake of biogas slurry Filtering unit includes biogas slurry holding vessel 1, raw liquor pump 2, granular membrane 3 and horizontal centrifuge 4；Biogas slurry essence filter element include pump 5, The 8-1 of more medium filter one, the 8-2 of more medium filter two, the 9-1 of straw filtering device one and the 9-2 of straw filtering device two；
Described biogas slurry ultrafiltration membrane treatment unit includes the 10-1 of hollow fiber ultrafiltration membrane one, the 10-2 of hollow fiber ultrafiltration membrane two With concentration liquid storage tank 11；
Described Membrane cleaning construction unit includes cleaning dosing tank 12, medicament and recycles case 13 and product pond 14；
The biogas slurry outlet of described biogas slurry holding vessel 1 is connected with the inlet of raw liquor pump 2, and raw liquor pump 2 passes through pipeline and sieve The inlet connection of web filter 3, the outlet of granular membrane 3 and the inlet communication of horizontal centrifuge 4, horizontal centrifuge 4 Liquid outlet is connected with the inlet of pump 5；Lower end import of the outlet of pump 5 by pipeline respectively with two more medium filters 8 connects It is logical, it is respectively arranged with magnetic valve on the pipeline at the 8-1 of more medium filter one and the 8-2 of more medium filter two lower end import Door two 15-2 and electromagnetic valve three 15-3, the 8-1 of more medium filter one and the 8-2 upper ends of more medium filter two outlet pass through pipe Line and the inlet communication of the 9-1 of the straw filtering device one and 9-2 of straw filtering device two upper end, in the 9-1 of straw filtering device one and stalk The 15-4 of electromagnetic valve four and the 15-5 of electromagnetic valve five are respectively arranged with pipeline at the 9-1 upper ends import of filter two；
The described 9-1 of straw filtering device one and the outlet of the 9-1 lower ends of straw filtering device two with the 15-6 mono- of electromagnetic valve six End connection, the 15-6 of electromagnetic valve six other end respectively with the 10-1 of the hollow fiber ultrafiltration membrane one and 10-2 of hollow fiber ultrafiltration membrane two The inlet communication of lower end, and the inlet communication of case 13 is recycled with medicament, while connecting the liquid outlet of concentration liquid storage tank 11； The 15-6 of electromagnetic valve six and medicament are disposed with the 16-1 of flowmeter one and electromagnetic valve ten between recycling the import of case 13 Eight 15-18；
Wherein, the import in product pond 14 is with being arranged on the 10-1 of hollow fiber ultrafiltration membrane one and hollow fiber ultrafiltration membrane two The 17-2 of vent valves two, the 17-3 of vent valves three, the 17-4 of vent valves four of 10-2 sides are connected with the 17-5 of vent valves five；Production The delivery port in product pond 14 is connected with the 15-15 one end of electromagnetic valve 15 and the 15-16 one end of electromagnetic valve 16 respectively；Magnetic valve The Men Shiwu 15-15 other end and atmosphere, the 15-16 of electromagnetic valve 16 other end respectively with the 15- of electromagnetic valve 17 17 one end and the product water lines 12-1 water inlets connection for cleaning dosing tank 12；The 15-17 of electromagnetic valve 17 other end point Do not connected with the import of pump 18 and upper medicament liquid reserve tank 13-1 liquid outlet；The outlet of pump 18 respectively with the 8- of more medium filter one The 1 and 8-2 of more medium filter two lower end import and the outlet of pump 5；
Wherein, cleaning dosing tank 12 is by product water lines 12-1, liquid feeding bucket 12-2, scalable air bag 12-3, pickling liquid case 12-4, alkali cleaning liquid case 12-5, sodium hypochlorite washing lotion case 12-6 and product water lotion case 12-7 are constituted；Described product water lines 12-1 delivery ports are connected with liquid feeding bucket 12-2 water inlet, and liquid feeding bucket 12-2 is connected by spring with scalable air bag 12-3, can Extension airbag 12-3 air inlet is connected with nine 15-9 one end of air inlet electromagnetic valve door, and the 15-9 other ends of electromagnetic valve nine connect with air It is logical, it is provided with the 16-4 of flowmeter four, electromagnetic valve ten between scalable air bag 12-3 air inlet and the 15-9 of electromagnetic valve nine The air inlet and the 16-4 outlets of flowmeter four of 15-10 import respectively with scalable air bag 12-3；Clean in dosing tank 12 Bottom be provided with pickling liquid case 12-4, alkali cleaning liquid case 12-5, sodium hypochlorite washing lotion case 12-6 and product water lotion case 12-7；Institute Pickling liquid case 12-4, alkali cleaning liquid case 12-5, sodium hypochlorite washing lotion case 12-6 and the product water lotion case 12-7 stated is respectively by electricity Magnet valve Men Shiyi 15-11, the 15-12 of electromagnetic valve 12, the 15-13 of electromagnetic valve 13 and the 15-14 of electromagnetic valve 14 and pump 17 Water inlet connection, the delivery port of pump 17 respectively with the 10-1 of hollow fiber ultrafiltration membrane one and the 10-2 lower ends of hollow fiber ultrafiltration membrane two Import and product pond 14 inlet communication, while recycling the inlet communication of case 13 with medicament；
Described medicament recycles case 13 and is made up of upper medicament liquid reserve tank 13-1 and lower medicament liquid reserve tank 13-2；Wherein, The inlet and the inlet and magnetic valve of pump 18 of upper medicament liquid reserve tank 13-1 liquid outlet respectively with lower medicament liquid reserve tank 13-2 Men Shiwu 15-15 one end is connected；Lower medicament liquid reserve tank 13-2 liquid outlet is connected with the inlet of pump 17；Upper medicament liquid reserve tank The 15-19 of electromagnetic valve 19 is provided between 13-1 liquid outlet and lower medicament liquid reserve tank 13-2 inlet；Described medicament Recycle import and the 10-1 of hollow fiber ultrafiltration membrane one and the liquid outlet of the 10-2 upper ends of hollow fiber ultrafiltration membrane two of case 13 Connection；Wherein, the 10-1 of hollow fiber ultrafiltration membrane one connects dense simultaneously with the liquid outlet of the 10-2 upper ends of hollow fiber ultrafiltration membrane two The import of contracting liquid storage tank 11.
Biogas slurry in present embodiment in biogas slurry holding vessel 1 is transported in granular membrane 3 through pump 2 carries out coarse filtration, goes Except the bulky grain solid in biogas slurry and part biogas residue etc..Biogas slurry after coarse filtration, which enters in horizontal centrifuge 4, to be centrifuged, and obtains solid Part biogas residue and liquid portion.Liquid portion is delivered in two more medium filters 8 and two straw filtering devices 9 through pump 5 Row pretreatment, obtains pretreatment biogas slurry and is further processed.
Embodiment nine：Illustrate present embodiment, present embodiment and the difference of embodiment eight with reference to Fig. 2 It is：The 17-1 of drain valve one import respectively with the outlet of the 8-1 of more medium filter one and the 8-2 upper ends of more medium filter two and The 9-1 of straw filtering device one and the 9-2 upper ends inlet communication of straw filtering device two.Other compositions and connected mode and embodiment Eight is identical.
Embodiment ten：Illustrate present embodiment, present embodiment and the difference of embodiment eight with reference to Fig. 2 It is：The 10-1 of hollow fiber ultrafiltration membrane one sides are provided with two product water outs, product water out by the 17-2 of drain valve two, The 17-3 of drain valve three is discharged, and hollow fiber ultrafiltration membrane 10-2 sides are provided with two product water outs, and product water out passes through row Put the 17-4 of the valve four and 17-5 of drain valve five control discharges.Other compositions and connected mode are identical with embodiment eight.
Embodiment 11：Illustrate present embodiment with reference to Fig. 2, present embodiment is different from embodiment eight Point is：In entering for the 10-1 of hollow fiber ultrafiltration membrane one and the 10-2 products water out of hollow fiber ultrafiltration membrane two and product pond 14 The 15-20 of electromagnetic valve 20, the 18-3 of pressure gauge three and the 16-3 of flowmeter three are disposed between the mouth of a river.Other compositions and connection Mode is identical with embodiment eight.
Embodiment 12：Illustrate present embodiment with reference to Fig. 2, present embodiment is different from embodiment eight Point is：The 18-1 of pressure gauge one, electromagnetism are disposed between the 16-1 of flowmeter one and medicament recycle the import of case 13 The 15-18 of the valve 18 and 18-4 of pressure gauge four.Other compositions and connected mode are identical with embodiment eight.
Embodiment 13：Illustrate present embodiment with reference to Fig. 2, present embodiment is different from embodiment eight Point is：The 17-6 of drain valve six, the 17- of drain valve seven are disposed between the 18-4 of pressure gauge four and the concentration import of liquid storage tank 11 7th, the 18-2 of pressure gauge two, the 17-8 of drain valve eight and the 16-2 of flowmeter one.Other compositions and connected mode and embodiment eight It is identical.
Embodiment 14：Illustrate present embodiment with reference to Fig. 2, present embodiment is different from embodiment eight Point is：Concentration liquid storage tank 11 side is provided with the concentrate discharge 15-21 of electromagnetic valve 21, concentration liquid storage tank 11 lower end The 15-22 of electromagnetic valve 22 is provided with liquid outlet pipeline.Other compositions and connected mode are identical with embodiment eight.
Embodiment 15：Illustrate present embodiment with reference to Fig. 2, present embodiment is different from embodiment eight Point is：Sample electromagnetic valve 24 15-24 import respectively with the 9-1 of straw filtering device one and the 9-2 of straw filtering device two Mouth is brought out to connect with the 15-6 one end of electromagnetic valve six.Other compositions and connected mode are identical with embodiment one.
Embodiment 16：Illustrate present embodiment with reference to Fig. 2, present embodiment is different from embodiment eight Point is：The 15-1 of electromagnetic valve one is provided with the pipeline of raw liquor pump 2 and granular membrane 3.Other compositions and connected mode It is identical with embodiment eight.
Embodiment 17：Illustrate present embodiment with reference to Fig. 2, present embodiment is different from embodiment eight Point is：The 15-26 of electromagnetic valve 26 import respectively with the 15-1 one end of electromagnetic valve one and the outlet of raw liquor pump 2.Its It constitutes identical with embodiment eight with connected mode.
Embodiment 18：Illustrate present embodiment with reference to Fig. 2, present embodiment is different from embodiment eight Point is：Medicament recycles and is provided with electromagnetic valve 15-28 between the outlet of case 13 and the import of pump 17.Other compositions and company Connect mode identical with embodiment eight.
Embodiment 19：Illustrate present embodiment with reference to Fig. 2, present embodiment is different from embodiment eight Point is：The lower floor of two more medium filters 8 is 3~5mm of particle diameter lightweight ANTHRACITE FILTER MEDIA, and middle level is 0.4~ 0.45mm particle diameter quartz sand filter medias, upper strata is 0.2~0.4mm particle diameter walnut shell filtering materials.Other compositions and connected mode and tool Body embodiment eight is identical.
Embodiment 20：Illustrate present embodiment with reference to Fig. 2, present embodiment is different from embodiment eight Point is：The 9-1 of straw filtering device one and the 9-2 of straw filtering device one filtrate is：It is 1mm stalks by average grain diameter, uses After 1.5mol/L dipping by lye 36h, cleaning is neutral to pH, is compacted after drying, as filtrate.It is other composition and connected mode and Embodiment eight is identical.
Embodiment 21：Illustrate present embodiment with reference to Fig. 2, present embodiment and embodiment eight are not It is with putting：The 10-1 of hollow fiber ultrafiltration membrane one and the 10-2 of hollow fiber ultrafiltration membrane two membrane module material are polypropylene PP, Film average pore size is 0.003 μm~0.01 μm, and the pH scope of applications are 1~13, and temperature applicable range is 5 DEG C~45 DEG C.It is other Composition and connected mode are identical with embodiment eight.
Embodiment 22：Illustrate present embodiment with reference to Fig. 2, present embodiment and embodiment eight are not It is with putting：The 10-1 of hollow fiber ultrafiltration membrane one and the 10-2 cleaning processes of hollow fiber ultrafiltration membrane two include：The circulation of milipore filter Cleaning, the cleaning agent immersion of milipore filter and the anti-cleaning of milipore filter.Other compositions and connected mode and the phase of embodiment eight Together.
Embodiment 23：Illustrate present embodiment with reference to Fig. 2, present embodiment and embodiment eight are not It is with putting：Pickling liquid case 12-4, alkali cleaning liquid case 12-5, sodium hypochlorite washing lotion case 12-6 and product water lotion case 12-7 inwalls are equal Provided with electric boiling plate, bottom is equipped with electromagnetic mixing apparatus.Other compositions and connected mode are identical with embodiment eight.
Embodiment 24：Illustrate present embodiment with reference to Fig. 2, present embodiment and embodiment eight are not It is with putting：Gas in scalable air bag 12-3 is the CO that methane purification comes out2.Other compositions and connected mode and specific reality Apply mode eight identical.
Beneficial effects of the present invention are verified by following examples：
Embodiment 1
The present embodiment is illustrated with reference to Fig. 2.
A kind of biogas slurry concentration of the present embodiment and the method for product water circulation use, detailed process are as follows：
First, biogas slurry preprocessing process：Biogas slurry in biogas slurry holding vessel 1 is transported to progress in 5mm granular membranes 3 through pump 2 Coarse filtration；Biogas slurry after coarse filtration, which enters in horizontal centrifuge 4, to be centrifuged, and obtains the solid portion and liquid portion of biogas residue；Liquid Part is delivered to the 8-1 of more medium filter one or the 8-2 of more medium filter two, and the 9-1 of straw filtering device one or stalk through pump 5 In the 9-2 of filter two, obtain pre-processing biogas slurry；
The solid (i.e. tiny biogas residue and impurity) that coarse filtration and centrifugation are obtained in above-mentioned processing procedure is after collection, by warp Crossing certain proportioning can use as compound fertilizer raw material；
Filtrate in described processing procedure in the 9-1 of the straw filtering device one or 9-2 of straw filtering device two is equal for average grain diameter For 1~2mm stalks, with neutrality is cleaned to after 0.2mol/L~2mol/L 24~48h of dipping by lye, filling is compacted after drying is Can；The 8-1 of more medium filter one or the 8-2 lower floors of more medium filter two are that particle diameter is 3~5mm's in described processing procedure Lightweight ANTHRACITE FILTER MEDIA, middle level is 0.4~0.45mm particle diameter quartz sand filter medias, and upper strata is filtered for 0.2~0.4mm particle diameters walnut shell Material；Filtrate in described processing procedure in straw filtering device terminates to rinse in filtering, can be directly as fermentation raw material Put into anaerobic fermentation tank；
2nd, hollow fiber ultrafiltration membrane processing procedure：The preprocessed obtained biogas slurry of step one is directed into doughnut to surpass Concentration is carried out in the 10-1 of filter membrane one or the 10-2 of hollow fiber ultrafiltration membrane two, wherein, two 10-1 of hollow fiber ultrafiltration membrane one Or the film average pore size of the 10-2 of hollow fiber ultrafiltration membrane two membrane module is 0.003 μm~0.01 μm；It is super by doughnut Concentrate after the 10-1 of the filter membrane one or 10-2 of hollow fiber ultrafiltration membrane two processing is delivered in concentration liquid storage tank 11, concentrate part The 10-1 of hollow fiber ultrafiltration membrane one or the 10-2 circular treatments of hollow fiber ultrafiltration membrane two are flowed back into, another part is through electromagnetic valve After 21 15-21 are excluded, collection is used as liquid fertilizer；Wherein, the 10-1 of hollow fiber ultrafiltration membrane one or hollow fiber ultrafiltration membrane Two 10-2 product water is by being arranged on the 17-2 of dump valve two, the 17-3 of dump valve three with the 10-1 sides of hollow fiber ultrafiltration membrane one Or the 17-4 of dump valve four, the 17-5 of the dump valve five product water out of the 10-2 sides of hollow fiber ultrafiltration membrane two are delivered to product water In pond 14, after collection is sterile-processed, is discharged or recycled；
Concentration uses hollow fiber ultrafiltration membrane, the described 10-1 of hollow fiber ultrafiltration membrane one in described processing procedure Or the film average pore size of the 10-2 components of hollow fiber ultrafiltration membrane two is 0.003 μm~0.01 μm, the pH scope of applications are 1~13； Temperature applicable range is 5 DEG C~45 DEG C；
3rd, hollow fiber ultrafiltration membrane cleaning process：Product water of the step 2 through collection is prepared into three kinds of different chemistry clear Washing lotion, three kinds of different chemical cleaning solutions are respectively that mass concentration is 0.6% citric acid cleaning liquid, and its pH is 3.0；Concentration is 250mg/L NaOH cleaning fluids, its pH is 10；And the NaClO cleaning fluids that concentration is 300mg/L；
Cleaning process is：
(1) soaking and washing is carried out first：
To the 10-1 soaking and washings of hollow fiber ultrafiltration membrane one：
First the 15-6 of the electromagnetic valve six and 15-22 of electromagnetic valve 22 is closed, and the 10-2 of hollow fiber ultrafiltration membrane two The 15-8 of inlet solenoid valve eight is closed, and then successively injects citric acid cleaning liquid, NaOH cleaning fluids and NaClO cleaning fluids through pump 17 Into the 10-1 of hollow fiber ultrafiltration membrane one, then by the 15-7 of electromagnetic valve seven, the 17-2 of drain valve two, the 17-3 of drain valve three, drain valve Seven 17-7 and the 17-8 Close Alls of drain valve eight, after the 10-1 of hollow fiber ultrafiltration membrane one sealings immersion 0.5 hour, open discharge The 17-7 of valve seven, the 17-6 of vent valves six and the 15-7 of electromagnetic valve seven, are discharged to medicament by the liquid after cleaning and recycle case 13, then the product water collected with step 2 rinses well；
Or to the 10-2 soaking and washings of hollow fiber ultrafiltration membrane two：
First the 15-6 of the electromagnetic valve six and 15-22 of electromagnetic valve 22 is closed, and the 10-1 of hollow fiber ultrafiltration membrane one The 15-7 of inlet solenoid valve seven and the 17-7 of outlet drain valve seven are closed, then successively by citric acid cleaning liquid, NaOH cleaning fluids and NaClO cleaning fluids are injected into hollow fiber ultrafiltration membrane 10-2 through pump 17, by the 15-8 of electromagnetic valve eight, the 17-4 of drain valve four, discharge The 17-5 of valve five and the 17-6 Close Alls of drain valve six, after hollow fiber ultrafiltration membrane 10-2 sealings immersion 0.5 hour, then the row of opening Go out the 17-6 of valve six and the 15-8 of electromagnetic valve eight, the liquid after cleaning is discharged into medicament recycles case 13, then uses step 2 The product water of collection is rinsed well；
(2) secondly, wash cycles are carried out：
To the 10-1 wash cycles of hollow fiber ultrafiltration membrane one：
First the 15-6 of the electromagnetic valve six and 15-22 of electromagnetic valve 22 is closed, the 17-2 dump valves of dump valve two are turned off The 17-8 of three 17-3 dump valves eight, will and then will be chemical clear by the 10-2 of hollow fiber ultrafiltration membrane two inlet solenoid valve eight 15-8 of door Washing lotion is injected into the 10-1 of hollow fiber ultrafiltration membrane one through pump 17, regulation hollow fiber ultrafiltration membrane one 10-1 pressure stability to 0.15Mpa, the medicament after cleaning is discharged into medicament through the 17-7 of dump valve seven and the 17-6 of dump valve six and recycles case 13, follows every time Ring is cleaned 20 minutes；Wherein, the injection order of chemical cleaning solution is：Product water-citric acid cleaning liquid-product water-NaOH cleanings Liquid-product water-NaClO solution-product water；Described product water is the product water that step 2 is collected；
Or to the 10-2 wash cycles of hollow fiber ultrafiltration membrane two：
First the 15-6 of the electromagnetic valve six and 15-22 of electromagnetic valve 22 is closed, the 10- of hollow fiber ultrafiltration membrane one is turned off 1 inlet solenoid valve door, seven 15-7, the 17-7 of dump valve seven and the 17-8 of dump valve eight, beat the 10-2 of hollow fiber ultrafiltration membrane two entrance electricity The magnet valve door eight 15-8 and 17-6 of dump valve six, close the 17-4 of the dump valve four and 17-5 of dump valve five；By chemical cleaning solution through pump 17 It is injected into the 10-2 of hollow fiber ultrafiltration membrane two, regulation hollow fiber ultrafiltration membrane 10-2 pressure stability is to 0.15Mpa, after cleaning Medicament enter medicament through the 17-6 of dump valve six and recycle case 13, each wash cycles 20 minutes；Wherein, chemical cleaning solution Injection order be：Product water-citric acid cleaning liquid-product water-NaOH cleaning fluids-product water-NaClO solution-product water；Institute The product water stated is the product water that step 2 is collected；
(3) finally carry out that milipore filter is counter cleans：
It is counter to the 10-1 of hollow fiber ultrafiltration membrane one to clean：
Close the 15-6 of electromagnetic valve six, the 15-7 of electromagnetic valve seven, the 15-8 of electromagnetic valve eight and the 15- of electromagnetic valve 22 22, while opening the 17-2 of the drain valve two and 17-3 of drain valve three；And close the 17-4 of drain valve four, the 17-5 of drain valve five and drain valve Eight 17-8, while the 17-7 of the vent valves seven and 17-6 of vent valves six is opened, during then chemical cleaning solution is injected into through pump 17 The 10-1 of fibre ultrafiltration film one, regulation hollow fiber ultrafiltration membrane one 10-1 pressure stability are to 0.15Mpa, the medicament warp after cleaning The 17-7 of the vent valves seven and 17-6 of vent valves six, is discharged into medicament and recycles case 13, every time anti-cleaning 20 minutes；Complete Described hollow fiber ultrafiltration membrane 10-1 cleanings；Wherein, the injection order of chemical cleaning solution is：Product water-citric acid cleaning liquid- Product water-NaOH cleaning fluids-product water-NaClO solution-product water；Described product water is the product water that step 2 is collected；
Or cleaned to the 10-2 of hollow fiber ultrafiltration membrane two is counter：
Close the 15-6 of electromagnetic valve six, the 15-7 of electromagnetic valve seven, the 15-8 of electromagnetic valve eight and the 15- of electromagnetic valve 22 22, while opening the 17-4 of drain valve four, the 17-5 of drain valve five and the 17-6 of vent valves six, and close the 17-2 of drain valve two, discharge The 17-3 of the valve three and 17-7 of vent valves seven, two hollow fiber ultrafiltration membrane 10-2 are injected into by chemical cleaning solution through pump 17, regulation The 10-2 of hollow fiber ultrafiltration membrane two pressure is stablized to 0.15Mpa, and the medicament after cleaning is discharged into through the 17-6 of vent valves six Medicament recycles case 13, every time anti-cleaning 20 minutes；Complete described hollow fiber ultrafiltration membrane 10-2 cleanings；Wherein, change Learn cleaning fluid injection order be：Product water-citric acid cleaning liquid-product water-NaOH cleaning fluids-product water-NaClO solution- Product water；Described product water is the product water that step 2 is collected；
Wherein, it is to prepare completion by cleaning dosing tank 12 that the chemical cleaning solution described in step 3 kind, which is prepared,.
Biogas slurry is after said apparatus and method processing, and pollutant load can reach national livestock and poultry cultivation and give up in product water Water discharge standard, as shown in table 1：The content of organic matter improves more than 4 times in condensed water, as shown in table 2：
The content (mg/L) of each pollutant in the product water of table 1
Test event TN TP SS CODCr
Biogas slurry stoste 690.78 34.2 372.34 12300.5
Product water 23.4 3 98.2 101.7
Standard 80 8.0 200 400
Main content of organics improves more than 4 times in condensed water, as shown in table 2：
Nutrition content (mg/L) in the condensed water of table 2
Test event Amino acid Humic acid Protein
Biogas slurry stoste 6.69 774.67 7999
Condensed water 27.54 3500 44000
Cycles of concentration 4.12 4.51 5.5

Claims (9)

1. a kind of biogas slurry concentration and the device of product water circulation use, it is characterised in that it includes biogas slurry pretreatment unit, biogas slurry Ultrafiltration membrane treatment unit and Membrane cleaning construction unit；
Described biogas slurry pretreatment unit includes biogas slurry coarse filtration unit and the smart filter element of biogas slurry；Wherein, biogas slurry coarse filtration list Member includes biogas slurry holding vessel（1）, raw liquor pump（2）, granular membrane（3）And horizontal centrifuge（4）；Biogas slurry essence filter element includes Pump one（5）, more medium filter one（8-1）, more medium filter two（8-2）, straw filtering device one（9-1）With straw filtering device Two（9-2）；
Described biogas slurry ultrafiltration membrane treatment unit includes hollow fiber ultrafiltration membrane one（10-1）, hollow fiber ultrafiltration membrane two（10-2） With concentration liquid storage tank（11）；
Described Membrane cleaning construction unit includes cleaning dosing tank（12）, medicament recycle case（13）With product pond（14）；
Described biogas slurry holding vessel（1）Biogas slurry outlet and raw liquor pump（2）Inlet connection, raw liquor pump（2）By pipeline with Granular membrane（3）Inlet connection, granular membrane（3）Outlet and horizontal centrifuge（4）Inlet communication, it is horizontal from Scheming（4）Liquid outlet and pump one（5）Inlet connection；Pump one（5）Outlet by pipeline respectively with two multimedium mistakes Filter（8）Lower end inlet communication, in more medium filter one（8-1）With more medium filter two（8-2）Lower end import at Pipeline on be respectively arranged with electromagnetic valve two（15-2）With electromagnetic valve three（15-3）, more medium filter one（8-1）With it is many Medium filter two（8-2）The outlet of upper end passes through pipeline and straw filtering device one（9-1）With straw filtering device two（9-2）It is upper The inlet communication at end, in straw filtering device one（9-1）With straw filtering device two（9-2）Set respectively on pipeline at the import of upper end There is electromagnetic valve four（15-4）With electromagnetic valve five（15-5）；
Described straw filtering device one（9-1）With straw filtering device two（9-2）The outlet of lower end with electromagnetic valve six（15-6） One end is connected, electromagnetic valve six（15-6）The other end respectively with hollow fiber ultrafiltration membrane one（10-1）And hollow fiber ultrafiltration membrane Two（10-2）The inlet communication of lower end, and recycle case with medicament（13）Inlet communication, while connect concentration liquid storage tank （11）Liquid outlet；In electromagnetic valve six（15-6）Case is recycled with medicament（13）Import between be disposed with flowmeter One（16-1）With electromagnetic valve 18（15-18）；
Wherein, product pond（14）Import and be arranged on hollow fiber ultrafiltration membrane one（10-1）With hollow fiber ultrafiltration membrane two （10-2）The drain valve two of side（17-2）, drain valve three（17-3）, drain valve four（17-4）With drain valve five（17-5）Connection； Product pond（14）Delivery port respectively with electromagnetic valve 15（15-15）One end and electromagnetic valve 16（15-16）One end connects It is logical；Electromagnetic valve 15（15-15）The other end and atmosphere, electromagnetic valve 16（15-16）The other end respectively with electricity Magnet valve door 17（15-17）One end and cleaning dosing tank（12）Product water lines（12-1）Water inlet is connected；Electromagnetic valve 17（15-17）The other end respectively with pump three（18）Import and upper medicament liquid reserve tank（13-1）Liquid outlet connection；Pump three （18）Outlet respectively with more medium filter one（8-1）And more medium filter two（8-2）Lower end import and pump one（5）'s Outlet；
Wherein, dosing tank is cleaned（12）By product water lines（12-1）, liquid feeding bucket（12-2）, scalable air bag（12-3）, pickling Liquid case（12-4）, alkali cleaning liquid case（12-5）, sodium hypochlorite washing lotion case（12-6）With product water lotion case（12-7）Constitute；Described Product water lines（12-1）Delivery port and liquid feeding bucket（12-2）Water inlet connection, liquid feeding bucket（12-2）By spring with it is scalable Air bag（12-3）Connection, scalable air bag（12-3）Air inlet and air inlet electromagnetic valve door nine（15-9）One end is connected, magnetic valve Men Jiu（15-9）The other end and atmosphere, in scalable air bag（12-3）Air inlet and electromagnetic valve nine（15-9）Between set It is equipped with flowmeter four（16-4）, electromagnetic valve ten（15-10）Import respectively with scalable air bag（12-3）Air inlet and stream Gauge four（16-4）Outlet；Clean dosing tank（12）Interior bottom is provided with pickling liquid case（12-4）, alkali cleaning liquid case（12- 5）, sodium hypochlorite washing lotion case（12-6）With product water lotion case（12-7）；Described pickling liquid case（12-4）, alkali cleaning liquid case（12- 5）, sodium hypochlorite washing lotion case（12-6）With product water lotion case（12-7）Pass through electromagnetic valve 11 respectively（15-11）, magnetic valve Door 12（15-12）, electromagnetic valve 13（15-13）With electromagnetic valve 14（15-14）With pump two（17）Water inlet connection, Pump two（17）Delivery port respectively with hollow fiber ultrafiltration membrane one（10-1）With hollow fiber ultrafiltration membrane two（10-2）Lower end is entered Mouth and product pond（14）Inlet communication, while recycling case with medicament（13）Inlet communication；
Described medicament recycles case（13）By upper medicament liquid reserve tank（13-1）With lower medicament liquid reserve tank（13-2）Constitute；Its In, upper medicament liquid reserve tank（13-1）Liquid outlet respectively with lower medicament liquid reserve tank（13-2）Inlet and pump three（18）Feed liquor Mouth and electromagnetic valve 15（15-15）One end is connected；Lower medicament liquid reserve tank（13-2）Liquid outlet and pump two（17）Inlet Connection；Upper medicament liquid reserve tank（13-1）Liquid outlet and lower medicament liquid reserve tank（13-2）Inlet between be provided with electromagnetic valve 19（15-19）；Described medicament recycles case（13）Import and hollow fiber ultrafiltration membrane one（10-1）And doughnut Milipore filter two（10-2）The liquid outlet connection of upper end；Wherein, hollow fiber ultrafiltration membrane one（10-1）And hollow fiber ultrafiltration membrane Two（10-2）The liquid outlet of upper end connects concentration liquid storage tank simultaneously（11）Import；
Biogas slurry concentration and the method for product water circulation use are carried out using the device, detailed process is as follows：
First, biogas slurry preprocessing process：Biogas slurry holding vessel（1）In biogas slurry through raw liquor pump（2）It is transported to 5mm granular membranes（3） Interior carry out coarse filtration；Biogas slurry after coarse filtration enters horizontal centrifuge（4）Middle centrifugation, obtains solid portion and the liquid portion of biogas residue Point；Liquid portion is through pump one（5）It is delivered to more medium filter one（8-1）Or more medium filter two（8-2）, then stalk mistake Filter one（9-1）Or straw filtering device two（9-2）In, obtain pre-processing biogas slurry；
2nd, hollow fiber ultrafiltration membrane processing procedure：The preprocessed obtained biogas slurry of step one is directed into hollow fiber ultrafiltration membrane One（10-1）Or hollow fiber ultrafiltration membrane two（10-2）Middle carry out concentration, wherein, hollow fiber ultrafiltration membrane one（10-1）Or Hollow fiber ultrafiltration membrane two（10-2）Membrane module film average pore size be 0.003 μm ~ 0.01 μm；Pass through hollow fiber ultrafiltration membrane One（10-1）Or hollow fiber ultrafiltration membrane two（10-2）Concentrate after processing is delivered to concentration liquid storage tank（11）It is interior, concentrate portion Divide and flow back into hollow fiber ultrafiltration membrane one（10-1）Or hollow fiber ultrafiltration membrane two（10-2）Circular treatment, another part is through electricity Magnet valve Men Ershi mono-（15-21）After exclusion, collection is used as liquid fertilizer；Wherein, hollow fiber ultrafiltration membrane one（10-1）Or it is hollow Fiber ultrafiltration membrane two（10-2）Product water by being arranged on and hollow fiber ultrafiltration membrane one（10-1）The drain valve two of side （17-2）, drain valve three（17-3）Or hollow fiber ultrafiltration membrane two（10-2）The drain valve four of side（17-4）, drain valve five （17-5）Product water out be delivered to product pond（14）In, after collection is sterile-processed, is discharged or recycled；
3rd, hollow fiber ultrafiltration membrane cleaning process：Product water of the step 2 through collection is prepared into three kinds of different chemical cleaning solutions, Three kinds of different chemical cleaning solutions are respectively that mass concentration is 0.5% ~ 0.8% citric acid cleaning liquid, and it is 2 ~ 4 to control its pH； 200mg/L ~ 500mg/L NaOH cleaning fluids, it is 10 ~ 12 to control its pH；200mg/L ~ 300mg/L NaClO cleaning fluids；
Cleaning process is：
（1）Soaking and washing is carried out first：
To hollow fiber ultrafiltration membrane one（10-1）Soaking and washing：
First by electromagnetic valve six（15-6）With electromagnetic valve 22（15-22）Close, and hollow fiber ultrafiltration membrane two（10- 2）Inlet solenoid valve door eight（15-8）Close, then successively by citric acid cleaning liquid, NaOH cleaning fluids and NaClO cleaning fluids through pump Two（17）It is injected into hollow fiber ultrafiltration membrane one（10-1）In, then by electromagnetic valve seven（15-7）, drain valve two（17-2）, discharge Valve three（17-3）, drain valve seven（17-7）With drain valve eight（17-8）Close All, to hollow fiber ultrafiltration membrane one（10-1）It is close After envelope immersion 0.5 ~ 2 hour, drain valve seven is opened（17-7）, drain valve six（17-6）With electromagnetic valve seven（15-7）, will clean Liquid afterwards is discharged to medicament and recycles case（13）, then the product water collected with step 2 rinses well；
Or to hollow fiber ultrafiltration membrane two（10-2）Soaking and washing：
First by electromagnetic valve six（15-6）With electromagnetic valve 22（15-22）Close, and hollow fiber ultrafiltration membrane one（10- 1）Inlet solenoid valve door seven（15-7）With outlet drain valve seven（17-7）Close, it is then successively that citric acid cleaning liquid, NaOH is clear Washing lotion and NaClO cleaning fluids are through pump two（17）It is injected into hollow fiber ultrafiltration membrane two（10-2）, by electromagnetic valve eight（15-8）, row Put valve four（17-4）, drain valve five（17-5）With drain valve six（17-6）Close All, to hollow fiber ultrafiltration membrane two（10-2） After sealing immersion 0.5 ~ 2 hour, then open drain valve six（17-6）With electromagnetic valve eight（15-8）, the liquid after cleaning is discharged Case is recycled to medicament（13）, then the product water collected with step 2 rinses well；
（2）Secondly, wash cycles are carried out：
To hollow fiber ultrafiltration membrane one（10-1）Wash cycles：
First by electromagnetic valve six（15-6）With electromagnetic valve 22（15-22）Close, turn off drain valve two（17-2）, discharge Valve three（17-3）, drain valve eight（17-8）, by hollow fiber ultrafiltration membrane two（10-2）Inlet solenoid valve door eight（15-8）Close, Will be then by chemical cleaning solution through pump two（17）It is injected into hollow fiber ultrafiltration membrane one（10-1）In, adjust hollow fiber ultrafiltration membrane One（10-1）Pressure stability to 0.1 ~ 0.25Mpa, the medicament after cleaning is through drain valve seven（17-7）With drain valve six（17-6） It is discharged into medicament and recycles case（13）, each wash cycles 10 ~ 40 minutes；Wherein, the injection order of chemical cleaning solution is：Production Product water-citric acid cleaning liquid-product water-NaOH cleaning fluids-product water-NaClO solution-product water；Described product water is step Rapid two product waters collected；
Or to hollow fiber ultrafiltration membrane two（10-2）Wash cycles：
First by electromagnetic valve six（15-6）With electromagnetic valve 22（15-22）Close, turn off hollow fiber ultrafiltration membrane one （10-1）Inlet solenoid valve door seven（15-7）, drain valve seven（17-7）With drain valve eight（17-8）, open hollow fiber ultrafiltration membrane Two（10-2）Inlet solenoid valve door eight（15-8）And drain valve six（17-6）, close drain valve four（17-4）With drain valve five （17-5）；By chemical cleaning solution through pump two（17）It is injected into hollow fiber ultrafiltration membrane two（10-2）In, adjust Hollow Fiber Ultrafiltration Film two（10-2）Pressure stability to 0.1 ~ 0.25Mpa, the medicament after cleaning is through drain valve six（17-6）Enter medicament circulation Utilize case（13）, each wash cycles 10 ~ 40 minutes；Wherein, the injection order of chemical cleaning solution is：Product water-citric acid is clear Washing lotion-product water-NaOH cleaning fluids-product water-NaClO solution-product water；Described product water is the product that step 2 is collected Water；
（3）Finally carry out that milipore filter is counter cleans：
To hollow fiber ultrafiltration membrane one（10-1）Anti- cleaning：
Close electromagnetic valve six（15-6）, electromagnetic valve seven（15-7）, electromagnetic valve eight（15-8）With electromagnetic valve 22 （15-22）, while opening drain valve two（17-2）With drain valve three（17-3）；And close drain valve four（17-4）, drain valve five （17-5）With drain valve eight（17-8）, while opening drain valve seven（17-7）With drain valve six（17-6）, then by Chemical cleaning Liquid is through pump two（17）It is injected into hollow fiber ultrafiltration membrane one（10-1）, adjust hollow fiber ultrafiltration membrane one（10-1）Pressure stability To 0.1 ~ 0.25Mpa, the medicament after cleaning is through drain valve seven（17-7）With drain valve six（17-6）, it is discharged into medicament and recycles Case（13）, it is anti-every time to clean 10 ~ 40 minutes；Complete described hollow fiber ultrafiltration membrane one（10-1）Cleaning；Wherein, chemistry is clear Washing lotion injection order be：Product water-citric acid cleaning liquid-product water-NaOH cleaning fluids-product water-NaClO solution-product Water；Described product water is the product water that step 2 is collected；
Or to hollow fiber ultrafiltration membrane two（10-2）Anti- cleaning：
Close electromagnetic valve six（15-6）, electromagnetic valve seven（15-7）, electromagnetic valve eight（15-8）With electromagnetic valve 22 （15-22）, while opening drain valve four（17-4）, drain valve five（17-5）With drain valve six（17-6）, and close drain valve two （17-2）, drain valve three（17-3）With drain valve seven（17-7）, by chemical cleaning solution through pump two（17）Doughnut is injected into surpass Filter membrane two（10-2）, adjust hollow fiber ultrafiltration membrane two（10-2）Pressure stability to 0.1 ~ 0.25Mpa, the medicament warp after cleaning Drain valve six（17-6）, it is discharged into medicament and recycles case（13）, it is anti-every time to clean 10 ~ 40 minutes；It is hollow described in completing Fiber ultrafiltration membrane two（10-2）Cleaning；Wherein, the injection order of chemical cleaning solution is：Product water-citric acid cleaning liquid-product Water-NaOH cleaning fluids-product water-NaClO solution-product water；Described product water is the product water that step 2 is collected；
Wherein, it is by cleaning dosing tank that the chemical cleaning solution described in step 3, which is prepared,（12）Prepare what is completed.
2. a kind of biogas slurry concentration according to claim 1 and the device of product water circulation use, it is characterised in that hollow Fiber ultrafiltration membrane one（10-1）Or hollow fiber ultrafiltration membrane two（10-2）Medicament after cleaning is reclaimed and detected, pH value is matched somebody with somebody with original The pH value of the chemical cleaning solution of system is respectively compared, and pH value difference is less than 1, carries out 2 utilizations, pH value difference is more than 1, by it through pump It is injected into more medium filter one（8-1）Or more medium filter two（8-2）In, to more medium filter one（8-1）Or many Jie Mass filter two（8-2）Carry out Chemical cleaning.
3. a kind of biogas slurry concentration according to claim 1 and the device of product water circulation use, it is characterised in that screen cloth mistake Filter（3）With horizontal centrifuge（4）The biogas residue obtained after processing as compound fertilizer raw material.
4. a kind of biogas slurry concentration according to claim 1 and the device of product water circulation use, it is characterised in that multimedium Filter one（8-1）And more medium filter two（8-2）Lower floor be 3 ~ 5mm of particle diameter lightweight ANTHRACITE FILTER MEDIA, middle level is equal For 0.4 ~ 0.45mm particle diameter quartz sand filter medias, upper strata is 0.2 ~ 0.4mm particle diameter walnut shell filtering materials.
5. a kind of biogas slurry concentration according to claim 1 and the device of product water circulation use, it is characterised in that stalk mistake Filter one（9-1）With straw filtering device two（9-2）Filtrate be：It is 1mm stalks by average grain diameter, with 1.5mol/L alkali lye Soak after 36h, cleaning is neutral to pH, is compacted after drying, as filtrate.
6. a kind of biogas slurry concentration according to claim 1 and the device of product water circulation use, it is characterised in that hollow fibre Tie up milipore filter one（10-1）With hollow fiber ultrafiltration membrane two（10-2）Membrane module material be polypropylene PP, film average pore size is equal For 0.003 μm ~ 0.01 μm, the pH scope of applications are 1~13, and temperature applicable range is 5 DEG C ~ 45 DEG C.
7. a kind of biogas slurry concentration according to claim 1 and the device of product water circulation use, it is characterised in that in two Fibre ultrafiltration film（10-1）、（10-2）Cleaning process includes：The wash cycles of milipore filter, the cleaning agent of milipore filter soak and super The anti-cleaning of filter membrane.
8. a kind of biogas slurry concentration according to claim 1 and the device of product water circulation use, it is characterised in that pickle Case（12-4）, alkali cleaning liquid case（12-5）, sodium hypochlorite washing lotion case（12-6）With product water lotion case（12-7）Inwall is equipped with electricity Heating plate, bottom is equipped with electromagnetic mixing apparatus.
9. a kind of biogas slurry concentration according to claim 1 and the device of product water circulation use, it is characterised in that scalable Air bag（12-3）In gas be the CO that comes out of methane purification2。
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0679275A (en) * 1991-11-22 1994-03-22 Daicel Chem Ind Ltd Treatment of waste water
JP2012239948A (en) * 2011-05-17 2012-12-10 Toray Ind Inc Method for washing filter medium, and water treatment apparatus
CN103613214A (en) * 2013-11-13 2014-03-05 清华大学 Movable type biogas slurry concentrating integrated equipment
CN105036245A (en) * 2015-06-09 2015-11-11 合肥信达膜科技有限公司 Medium-temperature biogas slurry wastewater pipe-type ultrafiltration membrane system treatment and recycling technique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0679275A (en) * 1991-11-22 1994-03-22 Daicel Chem Ind Ltd Treatment of waste water
JP2012239948A (en) * 2011-05-17 2012-12-10 Toray Ind Inc Method for washing filter medium, and water treatment apparatus
CN103613214A (en) * 2013-11-13 2014-03-05 清华大学 Movable type biogas slurry concentrating integrated equipment
CN105036245A (en) * 2015-06-09 2015-11-11 合肥信达膜科技有限公司 Medium-temperature biogas slurry wastewater pipe-type ultrafiltration membrane system treatment and recycling technique

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