CN109336271A - Depressurize the biogas slurry ammonia nitrogen film recovery system and method for auxiliary - Google Patents

Depressurize the biogas slurry ammonia nitrogen film recovery system and method for auxiliary Download PDF

Info

Publication number
CN109336271A
CN109336271A CN201811230621.3A CN201811230621A CN109336271A CN 109336271 A CN109336271 A CN 109336271A CN 201811230621 A CN201811230621 A CN 201811230621A CN 109336271 A CN109336271 A CN 109336271A
Authority
CN
China
Prior art keywords
biogas slurry
acid solution
hollow fiber
outlet
acid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201811230621.3A
Other languages
Chinese (zh)
Other versions
CN109336271B (en
Inventor
贺清尧
石明菲
晏水平
梁飞虹
涂特
徐立强
崔秋芳
徐朗
刘硕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huazhong Agricultural University
Original Assignee
Huazhong Agricultural University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huazhong Agricultural University filed Critical Huazhong Agricultural University
Priority to CN201811230621.3A priority Critical patent/CN109336271B/en
Publication of CN109336271A publication Critical patent/CN109336271A/en
Application granted granted Critical
Publication of CN109336271B publication Critical patent/CN109336271B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention discloses a kind of biogas slurry ammonia nitrogen film recovery systems of decompression auxiliary, the coarse filtration biogas slurry outlet of the input terminal connection solid-liquid separator of its fluid pump, the coarse filtration biogas slurry entrance of the output end connection biogas slurry circulating box of fluid pump, the vacuum orifice of the bleeding point connection biogas slurry circulating box of vacuum pump, the circulating box coarse filtration biogas slurry outlet of biogas slurry circulating box pumps the low temperature biogas slurry entrance of connection biogas slurry heater by biogas slurry, the high temperature biogas slurry outlet connection hollow fiber membrane contactors of biogas slurry heater, acid solution tank is equipped with the import of ortho acid liquid, the low temperature acid solution entrance of the ortho acid liquid outlet connection acid solution heater of acid solution tank, the ortho acid liquid entrance of the high temperature acid solution outlet connection hollow fiber membrane contactors of heater, the contactor biogas slurry outlet of hollow fiber membrane contactors and the biogas slurry outlet of biogas slurry circulating box access biogas slurry fluid reservoir, hollow fiber membrane contactors it is anti- Answer acid solution outlet connection acid solution tank.The ammonia nitrogen removal in biogas slurry is completed under the conditions of present invention realization low energy consumption.

Description

Depressurize the biogas slurry ammonia nitrogen film recovery system and method for auxiliary
Technical field
The invention belongs to biogas slurry treatment technical fields, and in particular to it is a kind of decompression auxiliary biogas slurry ammonia nitrogen film recovery system with Method.
Technical background
Biomass (such as agricultural crop straw, feces of livestock and poultry, kitchen garbage) under certain conditions can be through microbiological anaerobic Fermentation generates biogas.As a kind of renewable and clean energy resource, biogas can alleviate the imbalance between supply and demand of the energy to a certain extent.And As liquid remaining after anaerobic fermentation, biogas slurry can not only promote plant growth, but also can be effectively controlled plant disease Occur, is a kind of high-quality, organic fertilizer for imitating entirely.But ammonia-nitrogen content is higher in the biogas slurry that most of biogas projects generate, unsuitable Direct returning to farmland uses, while many biogas project locations lack soil required when biogas slurry returning to the field and dissolve area, to lead It causes biogas slurry that cannot be effectively treated, easily causes the secondary pollution of biogas slurry.Obviously, it needs to be effectively treated biogas slurry.From natural pond The nutriments such as ammonia nitrogen are recycled in liquid, are not only contributed to the returning to the field processing of biogas slurry, are reduced the biogas slurry containing high ammonia-nitrogen content to environment Potential threat, while acquisition nitrogenous fertilizer can also be recycled, be conducive to the further efficient utilization of nitrogen, increase the attached of biogas project It is value added, it is the important link during biogas slurry treatment.
So-called ammonia nitrogen refers to free state ammonia (NH3) or ammonium ion (NH4 +) nitrogen existing for form.For ammonia nitrogen in biogas slurry Recycling, currently used method mainly have chemical precipitation method, hyperfiltration, film vacuum distillation processing and gas stripping partition method Deng.Chemical precipitation method, which mainly passes through addition phosphoric acid and magnesium salts, to be made ammonia nitrogen be transferred to solid phase from liquid phase and further withdraws, and is convenient for Practical operation, low energy consumption, but needs to consume a large amount of chemicals.Ammonia nitrogen separation is carried out to biogas slurry using reverse osmosis technology, Advantage is that nutrient can be recycled simultaneously and produces cleaning water, but its high requirements on the equipment, and electric energy consumption is big, operational process In stability need to be further improved.The advantages of film vacuum distillation processing biogas slurry, is that ammonia nitrogen separative efficiency is higher, returns simultaneously Receiving product ammonium hydroxide can be using wide, but its thermal energy consumption is excessively high.The main advantage of gas stripping partition method is that ammonia nitrogen removal is steady Qualitative good but larger for chemical cost in the process, air stripping is easy to cause to foam and reduce ammonia nitrogen separative efficiency etc. and ask Topic.
Summary of the invention
The purpose of the present invention is in view of the above technical problems, provide it is a kind of decompression auxiliary biogas slurry ammonia nitrogen film recovery system with Method, the present invention can utilize the acid solution recycled in hollow-fibre membrane at reduced pressure conditions to absorb the ammonia nitrogen in biogas slurry, thus Ammonia nitrogen removal this purpose in biogas slurry is completed under the conditions of realization low energy consumption.The system carries out reduced pressure treatment, Ke Yishi to biogas slurry Conversion of the ammonia nitrogen to free ammonia in existing biogas slurry becomes ammonium salt so that free ammonia be allow to be absorbed through fenestra by acid solution.
In order to achieve this, the biogas slurry ammonia nitrogen film recovery system of decompression auxiliary designed by the present invention, it is characterised in that: it Including solid-liquid separator, fluid pump, vacuum pump, biogas slurry circulating box, biogas slurry fluid reservoir, biogas slurry pump, biogas slurry heater, doughnut Membrane contactor, acid solution heater, acid pump and acid solution tank, wherein solid-liquid separator is equipped with biogas slurry import, the input terminal of fluid pump Connect the coarse filtration biogas slurry outlet of solid-liquid separator, the coarse filtration biogas slurry entrance of the output end connection biogas slurry circulating box of fluid pump, vacuum The vacuum orifice of the bleeding point connection biogas slurry circulating box of pump, the circulating box coarse filtration biogas slurry outlet of biogas slurry circulating box is pumped by biogas slurry to be connected Connect the low temperature biogas slurry entrance of biogas slurry heater, the biogas slurry of the high temperature biogas slurry outlet connection hollow fiber membrane contactors of biogas slurry heater Entrance, acid solution tank are equipped with the import of ortho acid liquid, and the ortho acid liquid outlet of the acid solution tank connects the low of acid solution heater by acid pump Warm acid solution entrance, the ortho acid liquid entrance of the high temperature acid solution outlet connection hollow fiber membrane contactors of heater, hollow-fibre membrane connect The contactor biogas slurry outlet of tentaculum and the biogas slurry outlet of biogas slurry circulating box access biogas slurry fluid reservoir, hollow fiber membrane contactors Reaction acid solution outlet connection acid solution tank reaction acid solution import.
A kind of biogas slurry ammonia nitrogen film recovery method based on above system, it includes the following steps:
Step 1: former biogas slurry is separated by solid-liquid separation in solid-liquid separator, to obtain coarse filtration biogas slurry and biogas residue；
Step 2: with the coarse filtration biogas slurry in fluid pump draws solid-liquid separator, and being sent into biogas slurry circulating box, solid-liquid separator In deposit by sediment export be discharged；
Step 3: opening vacuum pump and vacuumize process is carried out to biogas slurry circulating box, coarse filtration biogas slurry is pumped into biogas slurry with biogas slurry pump Heater is entered the shell side portion of hollow fiber membrane contactors by biogas slurry entrance after being heated to 65~75 DEG C in biogas slurry heater Point, acid solution is exported by ortho acid liquid with acid pump and is pumped into acid solution heater, acid solution is heated to 65~75 in acid solution heater Enter the tube side of hollow fiber membrane contactors after DEG C by ortho acid liquid entrance, hollow fiber membrane contactors are set as acid solution in hydrophobicity It is flowed through inside hollow-fibre membrane, biogas slurry is flowed in the shell side part of hollow fiber membrane contactors, and the mineralized nitrogen in biogas slurry is certainly Fenestra by can pass through hydrophobic hollow fiber film after ammonia is absorbed by the acid solution inside hydrophobic hollow fiber film, closes biogas slurry storage The second valve on the first valve and reaction acid solution import in flow container inlet duct, makes the biogas slurry and acid in biogas slurry circulating box Acid solution in flow container carries out circular treatment；
Step 4: the ammonia nitrogen concentration of biogas slurry outlet outflow in biogas slurry circulating box is detected in above-mentioned circulating treatment procedure, when this When ammonia nitrogen concentration is lower than 50~100mg/L, the first valve is opened, biogas slurry is sent into biogas slurry fluid reservoir；Above-mentioned circulating treatment procedure The reaction acid solution pH value that reaction acid solution inlet flow enters in middle detection acid solution tank, judges to react whether acid solution pH value is higher than 6.0, if instead It answers acid solution pH value to be higher than 6.0, opens the second valve, reaction acid is gone out by the reaction acid solution inlet flow of acid solution tank.
The present invention utilizes film absorption process at reduced pressure conditions, carries out the ammonia nitrogen recovery processing in biogas slurry.Certain true Biogas slurry is not easy to cause to foam under empty condition, and process is stablized, and ammonia nitrogen removal rate is fast, and since evaporated quantity of water substantially reduces in turn Keep thermal energy consumption low.Ammonia nitrogen absorption is carried out using acid solution, using different types of acid solution, available ammonium salt or ammonium hydroxide etc. are different Industrial chemicals increases the application value of biogas slurry.Therefore it is de- ammonia nitrogen to be carried out to biogas slurry under a reduced pressure using film absorption technique Except this system of recovery processing can carry out the product being recovered at concentration in realizing biogas slurry while ammonia nitrogen removal Reason, had both reached and ammonia-nitrogen content in biogas slurry is effectively reduced, and can also realize the purpose of biogas slurry recycling.
The beneficial effects of the present invention are:
1, the present invention is realized by using hollow fiber membrane contactors effectively removes biogas slurry under vacuum and sour acceptance condition The purpose of middle and high concentration ammonia nitrogen allows the biogas slurry after processing directly to carry out the irrigation in farmland, is conducive to the processing of biogas slurry Application is conducive to the production of agricultural.
2, the present invention may be implemented to absorb in biogas slurry after the free ammonia of mineralized nitrogen using acid solution, can be according to specific hydrochlorate Chemical characteristic different products is obtained using different chemical treatment methods, increase the surcharge of biogas slurry.
3, the present invention is to realize the conversion of free ammonia under vacuum conditions, can substantially reduce the amount of gas purging biogas slurry, into And avoid the problem that biogas slurry foams, while reaction rate can be made to greatly increase, effectively shorten the reaction time.
4, the present invention be not involved in the problems, such as steam latent heat lose, heat demand is smaller, reaction temperature reduce, and then cause be Low energy consumption for system.
5, the gas of intermediate pump extraction of the present invention is largely carbon dioxide, can extract this carbon dioxide gas out and be used as The gas fertilizer of greenhouse, increases the yield of greenhouse crops, realizes carbon negative emission.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Wherein, 1-solid-liquid separator, 1.1-biogas slurry imports, 1.2-coarse filtration biogas slurries outlet, 1.3-sediments outlet, 2-fluid pumps, 3-vacuum pumps, 3.1-bleeding points, 4-biogas slurry circulating boxes, 4.1-coarse filtration biogas slurry entrances, 4.2-vacuumize Mouth, the outlet of 4.3-circulating box coarse filtration biogas slurries, 4.4-biogas slurry outlets, 5-biogas slurry fluid reservoirs, 6-biogas slurries pump, 7-biogas slurries add Hot device, 7.1-low temperature biogas slurry entrances, the outlet of 7.2-high temperature biogas slurries, 8-hollow fiber membrane contactors, 8.1-biogas slurry entrances, It is 8.2-ortho acid liquid entrances, the outlet of 8.3-contactor biogas slurries, the outlet of 8.4-contactor biogas slurries, 9-acid solution heaters, 9.1-low Warm acid solution entrance, the outlet of 9.2-high temperature acid solutions, 10-acid pumps, 11-acid solution tanks, 11.1-ortho acid liquid imports, 11.2-originals Acid solution outlet, 11.3-reaction acid solution imports, the 12.1-the first valve, the 12.2-the second valve, 13-ammonia nitrogen concentration sensors, 14-pressure sensors, the 15.1-the first thermometer, 15.2-second temperature meters, 16-pH sensors.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
The biogas slurry ammonia nitrogen film recovery system of decompression auxiliary of the invention, as shown in Figure 1, it includes solid-liquid separator 1, fluid Pump 2, vacuum pump 3, biogas slurry circulating box 4, biogas slurry fluid reservoir 5, biogas slurry pump 6, biogas slurry heater 7, hollow fiber membrane contactors 8, acid Liquid heater 9, acid pump 10 and acid solution tank 11, wherein solid-liquid separator 1 is equipped with biogas slurry import 1.1, the input terminal of fluid pump 2 Connect the coarse filtration biogas slurry outlet 1.2 of solid-liquid separator 1, the coarse filtration biogas slurry entrance of the output end connection biogas slurry circulating box 4 of fluid pump 2 4.1, the bleeding point 3.1 of vacuum pump 3 connects the vacuum orifice 4.2 of biogas slurry circulating box 4, the circulating box coarse filtration natural pond of biogas slurry circulating box 4 Liquid outlet 4.3 connects the low temperature biogas slurry entrance 7.1 of biogas slurry heater 7 by biogas slurry pump 6, and the high temperature biogas slurry of biogas slurry heater 7 goes out Mouth 7.2 connects the biogas slurry entrance 8.1 (the shell side part that biogas slurry flows through hollow fiber membrane contactors) of hollow fiber membrane contactors 8, Acid solution tank 11 is equipped with ortho acid liquid import 11.1, and the ortho acid liquid outlet 11.2 of the acid solution tank 11 connects acid solution by acid pump 10 and adds The low temperature acid solution entrance 9.1 of hot device 9, the ortho acid liquid of the 9.2 connection hollow fiber membrane contactors 8 of high temperature acid solution outlet of heater 9 Entrance 8.2 (film internal flow of the ortho acid liquid in hollow fiber membrane contactors), the contactor biogas slurry of hollow fiber membrane contactors 8 Outlet 8.3 and the biogas slurry outlet 4.4 of biogas slurry circulating box 4 access biogas slurry fluid reservoir 5, the reaction of hollow fiber membrane contactors 8 The reaction acid solution import 11.3 of 8.4 connection acid solution tank 11 of acid solution outlet.
In above-mentioned technical proposal, high temperature biogas slurry outlet 7.2 and the hollow fiber membrane contactors 8 of the biogas slurry heater 7 Be equipped with the first thermometer 15.1 in pipeline between biogas slurry entrance 8.1, the high temperature acid solution outlet 9.2 of the acid solution heater 9 with Second temperature meter 15.2 is equipped in pipeline between the ortho acid liquid entrance 8.2 of hollow fiber membrane contactors 8, on biogas slurry circulating box 4 Equipped with pressure sensor 14 and ammonia nitrogen concentration sensor 13, the control of the signal output end connection vacuum pump 3 of pressure sensor 14 (vacuum pump 3 adjusts working condition according to the pressure signal received, guarantees that the absolute pressure of biogas slurry circulating box 4 is maintained at 30 at end ~35kPa), the acid solution tank 11 is equipped with pH sensor 16.If the pH value of acid solution is higher than 6.0 in acid solution tank 11, need more A collection of acid solution is changed, acid solution pH value will be consistently lower than 6.0.
Above-mentioned ammonia nitrogen concentration sensor 13, pressure sensor 14, the first thermometer 15.1, second temperature meter 15.2, pH are passed Sensor 16 is used to measure the relevant parameter of solution everywhere, determines whether this system runs in normal range, has insufficient or super Relevant parameter is crossed, biogas slurry fluid reservoir 4, vacuum pump 3, biogas slurry heater 7 and acid solution heater 9 and acid solution tank 11 etc. will be adjusted Section, guarantees the normal work of system.
In above-mentioned technical proposal, solid-liquid separator 1 (stirring that solid-liquid separator is mixed and precipitated for the material) bottom The sediment outlet 1.3 for discharging biogas residue is additionally provided in end.
It is hydrophobic hollow fiber film, hollow-fibre membrane inside the hollow fiber membrane contactors 8 in above-mentioned technical proposal Contactor 8 is set as acid solution and flows through inside hydrophobic hollow fiber film, and biogas slurry is in the shell side part of hollow fiber membrane contactors 8 Flowing, the mineralized nitrogen in biogas slurry are the fenestra of permeable hydrophobic hollow fiber film after free ammonia by hydrophobic hollow fiber film Internal acid solution absorbs.
In above-mentioned technical proposal, after the biogas slurry outlet 4.4 of the 8.3 access biogas slurry circulating box 4 of contactor biogas slurry outlet Biogas slurry fluid reservoir 5 is accessed by the first valve 12.1.
In above-mentioned technical proposal, the second valve 12.2 is provided in the reaction acid solution import 11.3 of the acid solution tank 11.It can The reaction acid solution of processing centralized recovery is carried out according to the chemical characteristic of different products.
In above-mentioned technical proposal, the heat source of heating tube uses solar energy or the waste heat energy, to reach energy-saving and environment-friendly Effect.Acid pump, acid solution tank are all made of acid resisting material and are made.The fluid pump 2 endures the hot stream of suspended matter using with height Body pump, to be conducive to extract biogas slurry without resulting in blockage.
A kind of biogas slurry ammonia nitrogen film recovery method based on above system, it includes the following steps:
Step 1: former biogas slurry is separated by solid-liquid separation in solid-liquid separator 1, to obtain coarse filtration biogas slurry and biogas residue；
Step 2: extracting the coarse filtration biogas slurry in solid-liquid separator 1 with fluid pump 2, and be sent into biogas slurry circulating box 4, be separated by solid-liquid separation Deposit in device 1 is by 1.3 discharge of sediment outlet；
Step 3: open vacuum pump 3 to biogas slurry circulating box 4 carry out vacuumize process (by the reading of pressure sensor 14 come Reflection), coarse filtration biogas slurry is pumped into biogas slurry heater 7 with biogas slurry pump 6, is heated in biogas slurry heater 7 after 65~75 DEG C by natural pond Liquid entrance 8.1 enters the shell side part of hollow fiber membrane contactors 8, with acid pump 10 by acid solution (phosphoric acid or sulfuric acid) by ortho acid liquid Outlet 11.2 be pumped into acid solution heaters 9 in, acid solution 65~75 DEG C are heated in acid solution heater 9 after by ortho acid liquid entrance 8.2 Into the tube side of hollow fiber membrane contactors 8, hollow fiber membrane contactors 8 are set as acid solution inside hydrophobic hollow fiber film It flows through, biogas slurry is flowed in the shell side part of hollow fiber membrane contactors 8, and the mineralized nitrogen in biogas slurry is dredged to can pass through after free ammonia The fenestra of aqueous hollow-fibre membrane is absorbed by the acid solution inside hydrophobic hollow fiber film, closes 5 inlet duct of biogas slurry fluid reservoir In the first valve 12.1 and the second valve 12.2 in reaction acid solution import 11.3, make biogas slurry in biogas slurry circulating box 4 and Acid solution in acid solution tank 11 carries out circular treatment；
Step 4: biogas slurry discharge in biogas slurry circulating box 4 being detected by ammonia nitrogen concentration sensor 13 in above-mentioned circulating treatment procedure The ammonia nitrogen concentrations of mouthfuls 4.4 outflows, when the ammonia nitrogen concentration is lower than 50~100mg/L, (at this time the ammonia nitrogen concentration in biogas slurry has been Very low, biogas slurry at this time can be directly when fertilizer irrigated farmland, will not be to the toxic effect of plant), open the first valve 12.1, biogas slurry is sent into biogas slurry fluid reservoir 5, farmland can be directly discharged to by the outlet of biogas slurry fluid reservoir and be irrigated；Above-mentioned circulation Reaction acid solution (sour ammonia and the acid that reaction acid solution import 11.3 flows into acid solution tank 11 are detected by pH sensor 16 in treatment process Mixed liquor) pH value, judge react acid solution pH value whether be higher than 6.0, if reaction acid solution pH value be higher than 6.0, open the second valve 12.2, reaction acid solution is flowed out by the reaction acid solution import 11.3 of acid solution tank 11, and reaction acid solution at this time is sour ammonia solution, is then closed It closes the second valve 12.2 and new ortho acid liquid is added, the reaction acid solution put together can be carried out according to different acid solution types different Processing operation.
In above-mentioned technical proposal, for different types of acid solution, different ammonium salts finally can be obtained.For example, acid solution can be with It is sulfuric acid and phosphoric acid etc., by taking phosphoric acid as an example, what is obtained after absorbing the ammonia nitrogen in biogas slurry is tricresyl phosphate hydrogen ammonium, three hydrogen ammonium of sulfuric acid Two molecules of ammonia can be lost under aqueous solution heating condition and form dihydrogen sulfate ammonium, and dihydrogen sulfate ammonium is higher than 180 DEG C in temperature When decompose lose ammonia and water, the conditions such as vacuum or gas stripping can be taken to recycle ammonium hydroxide in this course, used Wider array of product ammonium hydroxide on the way.
In the step 3 of above-mentioned technical proposal, opening vacuum pump 3 follows biogas slurry the progress of biogas slurry circulating box 4 vacuumize process The absolute pressure of ring case 4 is maintained at 30~35kPa.
The present invention uses hollow fiber membrane contactors, and realization removes ammonia in biogas slurry under conditions of vacuum and acid are absorbed and combined Nitrogen, while the reaction product of acid solution and ammonia is obtained, realize the control of ammonia-nitrogen content and the purpose of reaction product in biogas slurry.The present invention Removal of ammonia and nitrogen in biogas slurry can be achieved to realize that Fertilizer Transformed utilizes so as to directly discharge to farmland, guarantee the ammonia-nitrogen content in biogas slurry In reasonable utilization section, while according to the difference of acid solution type, different subsequent processing measures is taken, ammonium hydroxide or ammonium salt are recycled Equal industrial chemicals.In addition, the present invention fully relies on waste and low-grade energy, reach low-cost processes biogas slurry and industrial chemicals The purpose of production.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.

Claims (8)

1. a kind of biogas slurry ammonia nitrogen film recovery system of decompression auxiliary, it is characterised in that: it includes solid-liquid separator (1), fluid pump (2), vacuum pump (3), biogas slurry circulating box (4), biogas slurry fluid reservoir (5), biogas slurry pump (6), biogas slurry heater (7), hollow-fibre membrane Contactor (8), acid solution heater (9), acid pump (10) and acid solution tank (11), wherein solid-liquid separator (1) is equipped with biogas slurry import (1.1), the coarse filtration biogas slurry of input terminal connection solid-liquid separator (1) of fluid pump (2) exports (1.2), the output end of fluid pump (2) The coarse filtration biogas slurry entrance (4.1) of biogas slurry circulating box (4) is connected, the bleeding point (3.1) of vacuum pump (3) connects biogas slurry circulating box (4) Vacuum orifice (4.2), biogas slurry circulating box (4) circulating box coarse filtration biogas slurry outlet (4.3) by biogas slurry pump (6) connection biogas slurry add The low temperature biogas slurry entrance (7.1) of hot device (7), high temperature biogas slurry outlet (7.2) the connection hollow-fibre membrane contact of biogas slurry heater (7) The biogas slurry entrance (8.1) of device (8), acid solution tank (11) are equipped with ortho acid liquid import (11.1), and the ortho acid liquid of the acid solution tank (11) goes out The low temperature acid solution entrance (9.1) of mouth (11.2) by acid pump (10) connection acid solution heater (9), the high-temperature acid of heater (9) Liquid exports the ortho acid liquid entrance (8.2) of (9.2) connection hollow fiber membrane contactors (8), the contact of hollow fiber membrane contactors (8) The biogas slurry outlet (4.4) of device biogas slurry outlet (8.3) and biogas slurry circulating box (4) accesses biogas slurry fluid reservoir (5), hollow-fibre membrane The reaction acid solution import (11.3) of reaction acid solution outlet (8.4) connection acid solution tank (11) of contactor (8).
2. the biogas slurry ammonia nitrogen film recovery system of decompression auxiliary according to claim 1, it is characterised in that: the biogas slurry heating It is equipped in pipeline between the high temperature biogas slurry outlet (7.2) of device (7) and the biogas slurry entrance (8.1) of hollow fiber membrane contactors (8) First thermometer (15.1), the high temperature acid solution outlet (9.2) and hollow fiber membrane contactors (8) of the acid solution heater (9) Second temperature meter (15.2) are equipped in pipeline between ortho acid liquid entrance (8.2), biogas slurry circulating box (4) is equipped with pressure sensor (14) and ammonia nitrogen concentration sensor (13), the control terminal of signal output end connection vacuum pump (3) of pressure sensor (14) are described Acid solution tank (11) is equipped with pH sensor (16).
3. the biogas slurry ammonia nitrogen film recovery system of decompression auxiliary according to claim 1, it is characterised in that: the separation of solid and liquid The sediment outlet (1.3) for discharging biogas residue is additionally provided in device (1) bottom end.
4. the biogas slurry ammonia nitrogen film recovery system of decompression auxiliary according to claim 1, it is characterised in that: the doughnut It is hydrophobic hollow fiber film inside membrane contactor (8), hollow fiber membrane contactors (8) are set as acid solution in the hollow fibre of hydrophobicity It is flowed through inside dimension film, biogas slurry is flowed in the shell side part of hollow fiber membrane contactors (8), and the mineralized nitrogen in biogas slurry is free ammonia The fenestra that can pass through hydrophobic hollow fiber film afterwards is absorbed by the acid solution inside hydrophobic hollow fiber film.
5. the biogas slurry ammonia nitrogen film recovery system of decompression auxiliary according to claim 1, it is characterised in that: the contactor natural pond Biogas slurry liquid storage is accessed by the first valve (12.1) after the biogas slurry outlet (4.4) of liquid outlet (8.3) access biogas slurry circulating box (4) Tank (5).
6. the biogas slurry ammonia nitrogen film recovery system of decompression auxiliary according to claim 1, it is characterised in that: the acid solution tank (11) the second valve (12.2) are provided in reaction acid solution import (11.3).
7. a kind of biogas slurry ammonia nitrogen film recovery method based on system described in claim 1, which is characterized in that it includes following step It is rapid:
Step 1: former biogas slurry is separated by solid-liquid separation in solid-liquid separator (1), to obtain coarse filtration biogas slurry and biogas residue；
Step 2: the coarse filtration biogas slurry in solid-liquid separator (1) is extracted with fluid pump (2), and is sent into biogas slurry circulating box (4), solid-liquid point From the deposit in device (1) by sediment outlet (1.3) discharge；
Step 3: opening vacuum pump (3) and vacuumize process is carried out to biogas slurry circulating box (4), taken out coarse filtration biogas slurry with biogas slurry pump (6) Enter biogas slurry heater (7), enters doughnut by biogas slurry entrance (8.1) after being heated to 65~75 DEG C in biogas slurry heater (7) Acid solution is pumped into acid solution heater (9) by ortho acid liquid outlet (11.2) with acid pump (10) by the shell side part of membrane contactor (8) In, acid solution be heated to 65~75 DEG C in acid solution heater (9) after by ortho acid liquid entrance (8.2) enter hollow fiber membrane contactors (8) tube side, hollow fiber membrane contactors (8) are set as acid solution and flow through inside hydrophobic hollow fiber film, and biogas slurry is hollow The shell side part of fiber-film contact (8) is flowed, and the mineralized nitrogen in biogas slurry is permeable hydrophobic hollow fiber after free ammonia The fenestra of film is absorbed by the acid solution inside hydrophobic hollow fiber film, closes the first valve in biogas slurry fluid reservoir (5) inlet duct The second valve (12.2) on door (12.1) and reaction acid solution import (11.3), makes the biogas slurry and acid in biogas slurry circulating box (4) Acid solution in flow container (11) carries out circular treatment；
Step 4: the ammonia nitrogen concentration of biogas slurry outlet (4.4) outflow in biogas slurry circulating box (4) is detected in above-mentioned circulating treatment procedure, It when the ammonia nitrogen concentration is lower than 50~100mg/L, opens the first valve (12.1), biogas slurry is sent into biogas slurry fluid reservoir (5)；It is above-mentioned The reaction acid solution pH value that reaction acid solution import (11.3) flows into acid solution tank (11) is detected in circulating treatment procedure, judges reaction acid Whether liquid pH value is higher than 6.0, if reaction acid solution pH value is higher than 6.0, opens the second valve (12.2), reaction acid is by acid solution tank (11) Reaction acid solution import (11.3) outflow.
8. biogas slurry ammonia nitrogen film recovery method according to claim 7, it is characterised in that: in the step 3, open vacuum pump (3) carrying out vacuumize process to biogas slurry circulating box (4) makes the absolute pressure of biogas slurry circulating box (4) be maintained at 30~35kPa.
CN201811230621.3A 2018-10-22 2018-10-22 Decompression-assisted biogas slurry ammonia nitrogen membrane recovery system and method Active CN109336271B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811230621.3A CN109336271B (en) 2018-10-22 2018-10-22 Decompression-assisted biogas slurry ammonia nitrogen membrane recovery system and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811230621.3A CN109336271B (en) 2018-10-22 2018-10-22 Decompression-assisted biogas slurry ammonia nitrogen membrane recovery system and method

Publications (2)

Publication Number Publication Date
CN109336271A true CN109336271A (en) 2019-02-15
CN109336271B CN109336271B (en) 2020-08-18

Family

ID=65311396

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811230621.3A Active CN109336271B (en) 2018-10-22 2018-10-22 Decompression-assisted biogas slurry ammonia nitrogen membrane recovery system and method

Country Status (1)

Country Link
CN (1) CN109336271B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111056719A (en) * 2019-12-02 2020-04-24 山西云海川环保科技有限公司 Sludge reduction deodorization system and process coupling belt type vacuum filtration and membrane absorption
KR102110441B1 (en) * 2019-12-17 2020-05-13 주식회사 퓨어엔비텍 The control method for ammonia removal system
CN112479483A (en) * 2020-11-02 2021-03-12 山西云海川环保科技有限公司 Anaerobic and aerobic wastewater treatment system and method based on hydrophobic membrane
CN113003884A (en) * 2021-03-16 2021-06-22 华中农业大学 Green ammonia water recovery system based on anaerobic fermentation and membrane distillation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204779209U (en) * 2015-07-10 2015-11-18 华中农业大学 Natural pond liquid subtracts quantization and clean system is cooperateed with to marsh gas
CN206188593U (en) * 2016-11-09 2017-05-24 英普（北京）环境科技有限公司 Anaerobic digestion processing system based on ammonia nitrogen is retrieved to membrane contactor side flow
CN106957133A (en) * 2017-04-19 2017-07-18 南昌航空大学 A kind of processing method of biogas slurry

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204779209U (en) * 2015-07-10 2015-11-18 华中农业大学 Natural pond liquid subtracts quantization and clean system is cooperateed with to marsh gas
CN206188593U (en) * 2016-11-09 2017-05-24 英普（北京）环境科技有限公司 Anaerobic digestion processing system based on ammonia nitrogen is retrieved to membrane contactor side flow
CN106957133A (en) * 2017-04-19 2017-07-18 南昌航空大学 A kind of processing method of biogas slurry

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111056719A (en) * 2019-12-02 2020-04-24 山西云海川环保科技有限公司 Sludge reduction deodorization system and process coupling belt type vacuum filtration and membrane absorption
KR102110441B1 (en) * 2019-12-17 2020-05-13 주식회사 퓨어엔비텍 The control method for ammonia removal system
CN112479483A (en) * 2020-11-02 2021-03-12 山西云海川环保科技有限公司 Anaerobic and aerobic wastewater treatment system and method based on hydrophobic membrane
CN113003884A (en) * 2021-03-16 2021-06-22 华中农业大学 Green ammonia water recovery system based on anaerobic fermentation and membrane distillation

Also Published As

Publication number Publication date
CN109336271B (en) 2020-08-18

Similar Documents

Publication Publication Date Title
CN109336271A (en) Depressurize the biogas slurry ammonia nitrogen film recovery system and method for auxiliary
CN105000739B (en) Biogas slurry minimizing treatment and biogas cooperated purification system and purification method
CN104261907B (en) The dry type anaerobic treatment method of rubbish from cooking
CN203904338U (en) Double-path reflux anaerobic reaction system and reactor for producing biogas by using straw
CN105731751A (en) System and method for co-producing bio-natural gas and ammonium bicarbonate from dried livestock and poultry manure
CN105543314A (en) Method for producing polymyxin E through fermentation and foam separation coupling
CN106754294A (en) A kind of apparatus and method of vinegar grain solid-liquid split-phase anaerobic digestion methane production
CN105985910A (en) Novel method and process for carbon supplement during microalgae culture
CN108658361A (en) The integrated livestock and poultry cultivating system of biomass cogeneration of heat and power
CN204779209U (en) Natural pond liquid subtracts quantization and clean system is cooperateed with to marsh gas
CN208980679U (en) Using the methane purification and fertilizer production integral system of renewable ammonium hydroxide
CN106007255A (en) Advanced treatment system and method for biogas slurry in domestic household biogas tank
CN104031834B (en) A kind of photosynthetic bacterium successive reaction hydrogen production process
CN108658406A (en) Manufacture the production system of compoiste fertilizer on the spot using animal waste
CN105176811B (en) System and method for utilizing biogas slurry and straw hydrolysate to prepare amino acid and separate CO2
CN208517294U (en) A kind of industrialized compost dehydration device
CN206680207U (en) COD, the processing system of ammonia nitrogen in a kind of removal steam
CN208545283U (en) A kind of Thermophilic Bacteria biological treatment sludge two-phase anaerobic digestion device
CN103589470A (en) Technology for preparing biogas through methane
CN207227416U (en) A kind of stalk marsh gas biogas slurry circulatory system
CN206646875U (en) The utilization system of livestock and poultry cultivation and agricultural greenhouse
CN205382166U (en) Device for producing polymyxin E by coupling fermentation and foam separation
CN213187194U (en) Electricity is assisted and is heated stirring fertilizer injection unit
CN210674465U (en) Ammonium sulfate recovery system
CN208791448U (en) A kind of device using Thermophilic Bacteria processing sludge acidogenic fermentation liquid recycling guanite

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant