CN109593641A - A kind of uniform feed supplement automatic control system that the opportunity of wheat stalk producing methane determines certainly - Google Patents

A kind of uniform feed supplement automatic control system that the opportunity of wheat stalk producing methane determines certainly Download PDF

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CN109593641A
CN109593641A CN201910082898.4A CN201910082898A CN109593641A CN 109593641 A CN109593641 A CN 109593641A CN 201910082898 A CN201910082898 A CN 201910082898A CN 109593641 A CN109593641 A CN 109593641A
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feed supplement
methane
wheat stalk
fermentation vat
fermentation
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沈丽尧
孙春华
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Jiaxing University
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    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M21/00—Bioreactors or fermenters specially adapted for specific uses
    • C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
    • C12M29/18—External loop; Means for reintroduction of fermented biomass or liquid percolate
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
    • C12M41/30—Means for regulation, monitoring, measurement or control, e.g. flow regulation of concentration
    • C12M41/34—Means for regulation, monitoring, measurement or control, e.g. flow regulation of concentration of gas
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
    • C12M41/48—Automatic or computerized control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

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Abstract

A kind of uniform feed supplement automatic control system that the opportunity of wheat stalk producing methane determines certainly, belongs to biogas production control technology field.Existing wheat stalk producing methane feeding-system is solved, because its feeding time, feed supplement amount, feed supplement uniformity do not consider to produce vaporous condition, the not high problem of caused gas producing efficiency.Control system proposed by the present invention can periodically pass through electronic control unit (11) acquisition and be arranged in the signal that fermentation vat produces gas flow sensor (17) and methane transducer (18) at gas export pipeline (19), it analyzes fermentation vat (2) and currently produces gas situation, determine a need for feed supplement；Once it is determined that feeding time, electronic control unit (11) calculates the stepping rate of feed supplement amount and fermentation liquid circulation time and stepper motor (15)；Electronic control unit (11) signals to control feed supplement solenoid valve (9), stepper motor and fermentation liquid circulation pump (6) operation.The feed supplement automatic control system of wheat stalk producing methane proposed by the present invention can accurately determine feeding time, feed supplement amount, and adjust material mixing uniformity in fermentor by fermentation liquid circulation program according to fermentation vat state.

Description

A kind of uniform feed supplement automatic control system that the opportunity of wheat stalk producing methane determines certainly
Technical field
The invention belongs to biogas production control technology field, in particular to a kind of control of additive raw material system of wheat stalk producing methane System.
Background technique
Wheat stalk producing methane meets environmental protection and sustainable development strategy, also has actively to guarantee Chinese energy safety Effect.At present in wheat stalk continuing fermentation producing methane commercial process, feed operation is typically all to be based on experience, with spy As feeding time at the time of fixing time behind interval, it is too late or too early feed supplement easily occur, and microbiologic population in fermentation vat is caused to be withered Contracting, abundance reduce or organic concentration crosses substantially that methanogen scale is not excessive, and biogas efficiency reduces.
To prevent wheat stalk after feed supplement from gathering in fermentation vat, the mixing uniformity of organic matter and bacterium is improved, to mention High yield gas efficiency.Patent CN2015209705953 and CN2015102553649 are respectively adopted design fermenting tank structure and are fermenting The methods of spray improves distributing homogeneity of the wheat stalk in fermentation vat in pond, but the above method does not consider that current fermentation vat produces Vaporous condition, distributing homogeneity degree of the material in fermentation vat are also uncontrollable.
Summary of the invention
The technical problem to be solved by the present invention is the feeding-system of existing wheat stalk producing methane, feeding time, benefit Expect that uniformity does not consider to produce vaporous condition, gas producing efficiency is not high.
It is proposed it is a kind of according to fermentation vat produce gas in methane total amount and methane concentration, feeding time, feed supplement can be judged automatically Amount, and adjust the wheat stalk producing methane feed supplement automatic control system of material distributing homogeneity in fermentation vat.
Technical solution of the present invention:
A kind of opportunity of wheat stalk producing methane from the uniform feed supplement automatic control system determined, the system include strainer, Fermentation liquid into circulation pump conduit, fermentation liquid circulation pump, fermentation liquid go out recycle pump conduit, wheat stalk feed supplement tank, feed supplement solenoid valve, The uniform bulk cargo outlet of feed supplement amount label, electronic control unit, feed supplement tank, binder piston rod part, stepper motor, straw powder are uniformly released Put sieve, gas flow sensor, sensing methane concentration device.
The strainer is arranged in fermentation liquid into circulating pump pipe ends.
The fermentation liquid protrudes into fermentation vat into circulation pump conduit, one end, and end face is away from fermentation vat inner wall 5cm or so；Hair Zymotic fluid is provided with external screw thread into circulation pump conduit surface and is threadedly coupled with fermentation vat.
The fermentation liquid circulation pump, one end connect fermentation liquid into circulation pump conduit, and other end connection fermentation liquid goes out to follow Ring pump conduit.
The wheat stalk feed supplement tank, end are the uniform bulk cargo outlet of feed supplement tank；Go out away from the uniform bulk cargo of feed supplement tank Feed supplement valve is disposed at mouth 5-20cm；Wheat stalk feed supplement tank table between the uniform bulk cargo outlet of feed supplement tank and feed supplement solenoid valve Face is equipped with pipe screw thread, and goes out to recycle pump conduit with fermentation liquid and be connected.
The uniform bulk cargo outlet of the feed supplement tank, is made of, diameter is wheat stalk average length 8 incorgruous hole exits 3~5 times.
The wheat stalk feed supplement tank is marked equipped with feed supplement amount, convenient for determining feed supplement amount.
The stepper motor is connected by binder piston rod part with wheat stalk feed supplement tank.
The straw powder uniformly discharges sieve, goes out circulating pump pipe ends with fermentation liquid and is connected, protrude into fermentation vat, position is most It measures far from fermentation vat waste outlet；Straw powder uniformly discharges on sieve, and being disposed with diameter is 3~5 times of wheat stalk average length Relief hole.
The gas flow sensor produces gas export pipeline with fermentation vat and is connected by screw thread, and measurement fermentation vat is produced Various gas volume total flows.
The sensing methane concentration device produces gas export pipeline with fermentation vat and is connected by screw thread, and measurement fermentation vat produces gas Middle concentration of methane gas.
The electronic control unit is connect with gas flow sensor and sensing methane concentration device, acquisition gas flow sensing Device signal and sensing methane concentration device signal.
The electronic control unit is connect with feed supplement solenoid valve, and electronic control unit will control signal and export to feed supplement solenoid valve, control Feed supplement solenoid valve processed opens and closes.
The electronic control unit, connect with stepper motor, and electronic control unit will control signal and export to stepper motor, control step Into motor speed.
The electronic control unit is believed by the gas flow sensor signal and methane gas concentration sensor that collect Number, obtain the production gas total flow Q that current fermentation vat produces gas outletAlwaysAnd methane concentration CMethane, and calculated by simple multiplying It obtains fermentation vat and produces gas outlet methane total flow QMethane=Q × CMethane。
A kind of feed supplement automatic control system of wheat stalk producing methane, operational process include:
Step 1, the feed supplement automatic control system, after energization, every the gas flow sensor of acquisition in 2 hours Signal and methane gas concentration sensor signal obtain fermentation vat and produce gas outlet methane total flow QMethane is surveyedAnd methane concentration CMethane is surveyed。
Step 2, to whether feed supplement being needed to judge:
The fermentation vat that electronic control unit comparison present analysis obtains produces gas outlet methane total flow QMethane is surveyedIn electronic control unit The fermentation vat of portion's storage produces the methane total flow design value Q of gas outletMethane is set。
Situation a:QMethane is surveyed< k1×QMethane is set, k1For threshold coefficient, 0.6~0.8 is taken, fermentation vat needs feed supplement, enters step Three.
Situation b: other situations, fermentation vat do not need feed supplement, return step one.
Step 3, electronic control unit calculate wheat stalk feed supplement amount mWheat stalk, feed supplement solenoid valve open, stepper motor and fermentation Liquid recycles pump operation time T and stepper motor stepping rate v.
Step 4, the parameter that electronic control unit is calculated according to step 3: feed supplement solenoid valve, stepper motor and fermentation liquid follow Ring pump operation time T and stepper motor stepping rate v issues control signal to feed supplement solenoid valve, stepper motor and fermentation liquid Circulating pump.
Step 5, feed supplement solenoid valve execute electronic control unit open command；Fermentation liquid circulation pump executes electronic control unit operating life It enables；Stepper motor executes electronic control unit operating order, stepping rate v.
Step 6 after electronic control unit timing to T, issues control signal to feed supplement solenoid valve, stepper motor and fermentation liquid and follows Ring pump, closing feed supplement solenoid valve, stepper motor and fermentation liquid circulation pump, feed supplement terminates, return step one.
Beneficial effects of the present invention: the opportunity of wheat stalk producing methane of the invention automatically controls from the uniform feed supplement determined System has the advantage that
1, propose system, to former fermentation vat change it is small, only need to be opened up on fermentation vat fermentation liquid into circulation pump conduit and Fermentation liquid goes out to recycle pump conduit screw thread mouth；And it need to only be produced in fermentation vat and open up gas flow sensor and methane on gas export pipeline The mounting hole of two sensors of gas concentration sensor.
2, the system proposed can produce gas situation according to fermentation vat and determine feeding time, avoid feed supplement too early or too late, ferment The problem of organic matter surplus and fermentation vat gas production deficiency in pond improves gas producing efficiency.
3, the system proposed, can be according to fermentation vat methane phase gas concentration, when adaptive change fermentation liquid circulation pump operation Between, to realize that fermentation liquid circulation degree is controllable, and finally realize the control to material distribution consistency degree in fermentation vat, improves organic Object utilization rate.
4, the system proposed, high degree of automation, after filler is sufficient in feed supplement tank, can be realized feeding time, The automatic calculating and control of feed supplement amount, circulation degree, feed supplement time etc..
Detailed description of the invention
A kind of uniform feed supplement automatic control system schematic diagram of Fig. 1 opportunity of wheat stalk producing methane from judgement.
The uniform bulk cargo export structure schematic diagram of Fig. 2 feed supplement tank.
A kind of feed supplement automatic control system operational flow diagram of wheat stalk producing methane of Fig. 3.
In figure: 1. fermentation vats, 2. fermentation liquids, 3. fermentation vat waste outlets, 4. strainers, 5. fermentation liquids into circulation pump conduit, 6. fermentation liquid circulation pumps, 7. fermentation liquids go out to recycle pump conduit, 8. wheat stalk feed supplement tanks, 9. feed supplement solenoid valves, 10. feed supplement amount marks Note, 11. electronic control unit, the uniform bulk cargo outlet of 12. feed supplement tanks, 13. wheat stalk virgin materials, 14. binder piston rod parts, 15. Stepper motor, 16. straw powders uniformly discharge sieve, 17. gas flow sensors, 18. sensing methane concentration devices, the production of 19. fermentation vats Gas export pipeline.
Specific embodiment
The present invention will be further described below with reference to the drawings.
A kind of uniform feed supplement automatic control system that the opportunity of wheat stalk producing methane determines certainly, as shown in Figure 1.The system Go out to recycle pump conduit 7, wheat stalk feed supplement into circulation pump conduit 5, fermentation liquid circulation pump 6, fermentation liquid including strainer 4, fermentation liquid The uniform bulk cargo of tank 8, feed supplement solenoid valve 9, feed supplement amount label 10, electronic control unit 11, feed supplement tank exports 12, binder piston rod part 14, stepper motor 15, straw powder uniformly discharge sieve 16, gas flow sensor 17, sensing methane concentration device 18.
The strainer 4 is arranged in fermentation liquid into circulation 5 end of pump conduit.
The fermentation liquid protrudes into fermentation vat 1 into circulation pump conduit 5, one end, and end face is away from fermentation vat 5cm or so；Fermentation Liquid is provided with external screw thread into circulation 5 surface of pump conduit and is threadedly coupled with fermentation vat 1.
The fermentation liquid circulation pump 6, one end connect fermentation liquid into circulation pump conduit 5；Other end connection fermentation liquid goes out Recycle pump conduit 7.
The wheat stalk feed supplement tank 8, end are the uniform bulk cargo outlet 12 of feed supplement tank；Away from the uniform bulk cargo of feed supplement tank Feed supplement valve 9 is disposed at outlet 5-20cm；Wheat stalk between the uniform bulk cargo outlet 12 of feed supplement tank and feed supplement solenoid valve 9 is mended 8 surface of batch can is equipped with pipe screw thread, and goes out to recycle pump conduit 7 with fermentation liquid and be connected.
The uniform bulk cargo outlet 12 of the feed supplement tank, is made of 8 incorgruous hole exits, as shown in Fig. 2, diameter is wheat 3~5 times of stalk average length.
The wheat stalk feed supplement tank 8 is equipped with feed supplement amount label 10, convenient for quantitatively determining feed supplement amount
The stepper motor 15 is connected by binder piston rod part 14 with wheat stalk feed supplement tank 8.
The straw powder uniformly discharges sieve 16, goes out circulation 7 end of pump conduit with fermentation liquid and is connected, protrudes into fermentation vat 1, position It sets as far as possible far from fermentation vat waste outlet 3；Straw powder uniformly discharges on sieve 16, and being disposed with diameter is wheat stalk average length 3~5 times of relief hole.
The gas flow sensor 17 produces gas export pipeline 19 with fermentation vat and is connected by screw thread, measures fermentation vat 1 Produce various gas volume total flows.
The sensing methane concentration device 18 produces gas export pipeline 19 with fermentation vat and is connected by screw thread, measures fermentation vat Concentration of methane gas in generating tube road 19.
The electronic control unit 11, connect with gas flow sensor 17 and sensing methane concentration device 18, acquires gas stream Quantity sensor signal and sensing methane concentration device signal.
The electronic control unit 11, connect with feed supplement solenoid valve 9, and electronic control unit 11 is exported signal is controlled to feed supplement electromagnetism Valve 9 controls the opening and closing of feed supplement solenoid valve 9.
The electronic control unit 11, connect with stepper motor 15, and electronic control unit 11 is exported signal is controlled to stepper motor 15, control the revolving speed of stepper motor 15.
The electronic control unit 11 passes through the gas flow sensor 17 and methane gas concentration sensor 18 collected Signal, obtain the production gas total flow Q that current fermentation vat produces gas outletAlwaysAnd methane concentration CMethane, and can be transported by simple multiplication Calculation is calculated fermentation vat and produces methane total flow Q at gas export pipeline 19Methane=Q × CMethane。
The methane total flow Q obtained according to electronic control unit 11MethaneWith methane concentration CMethane, determine whether fermentation vat 1 needs to mend Material does not need feed supplement such as, and feed supplement solenoid valve 9 is kept to be in off state；Feed supplement is such as needed, is calculated toward wheat stalk feed supplement amount mWheat stalk, 15 stepping rate v of stepper motor and feed supplement solenoid valve 9 open, stepper motor 15 and when fermentation liquid circulation 6 work of pump Between T, and issue signal, open feed supplement solenoid valve 9, and start stepper motor 15 and fermentation liquid circulation pump 6.
The feed supplement automatic control system of the wheat stalk producing methane, operational process are as shown in Figure 3, comprising:
Step 1, the feed supplement automatic control system, after energization, every the gas flow sensor of acquisition in 2 hours 18 signal of 17 signals and methane gas concentration sensor obtains fermentation vat and produces methane total flow Q at gas export pipeline 19Methane is surveyedAnd first Alkane concentration CMethane is surveyed。
Step 2, to whether feed supplement being needed to judge:
Electronic control unit 11 compares the fermentation vat that present analysis obtains and produces methane total flow Q at gas export pipeline 19Methane is surveyedWith electricity Control the methane total flow design value Q at the fermentation vat production gas export pipeline 19 of 11 storage inside of unitMethane is set。
Situation a:QMethane is surveyed< k1×QMethane is set, k1For threshold coefficient, 0.6~0.8 is taken, fermentation vat 1 needs feed supplement, enters step three.
Situation b: other situations, fermentation vat 1 do not need feed supplement, return step one.
Step 3, electronic control unit 11 calculate wheat stalk feed supplement amount mWheat stalk, feed supplement solenoid valve 9 open, 15 and of stepper motor Fermentation liquid circulation pumps 6 working time T and 15 stepping rate v of stepper motor.
Step 4, the parameter that electronic control unit 11 is calculated according to step 3: the unlatching of feed supplement solenoid valve 9, stepper motor 15 6 working time T and 15 stepping rate v of stepper motor are pumped with fermentation liquid circulation, issue control signal to feed supplement solenoid valve 9, step Into motor 15 and fermentation liquid circulation pump 6.
Step 5, feed supplement solenoid valve 9 execute 11 open command of electronic control unit；Fermentation liquid circulation pump 6 executes electronic control unit 11 Operating order；Stepper motor 15 executes the operating order of electronic control unit 11, stepping rate v.
Step 6 after 11 timing to T of electronic control unit, issues control signal to feed supplement solenoid valve 9, stepper motor 15 and fermentation Liquid circulating pump 6 closes feed supplement solenoid valve 9, stepper motor 15 and fermentation liquid circulation pump 6, and feed supplement terminates, return step one.
The step 3 electronic control unit 11 calculates wheat stalk feed supplement amount mWheat stalk, feed supplement solenoid valve 9 open, stepper motor 15 and fermentation liquid circulation 6 working time T of pump and 15 stepping rate v of stepper motor, calculation method are as follows:
Wherein, mWheat stalk is setTo demarcate wheat stalk Quality Design value, it is added in wheat stalk feed supplement tank 8 for the first time Wheat stalk quality.
Wherein, k2For recycle ratio, 0.2~3 is taken；VFermentation vatFor 1 total volume of fermentation vat；For 6 stream of fermentation liquid circulation pump Amount, fermentation liquid circulation, which pumps 6 type selectings, should meet pump flowIts pump liquid volume V per hour1h2V should be metFermentation vat≤V1h ≤5VFermentation vat；CMethane is setThe methane concentration design value at gas export pipeline 19 is produced for the fermentation vat of 11 storage inside of electronic control unit, generally Take 0.4~0.6.
Wherein, ρWheat stalkFor the density of wheat stalk virgin material 13；SFeed supplement tank cross sectionFor the cross section face of wheat stalk feed supplement tank 8 Product.
The above single-chip microcontroller in eight tunnels of mainstream on the market can be selected in electronic control unit 11, can be fixed in the requsst listed below to single-chip microcontroller producer System:
1) methane total flow design value and methane concentration design value can be set；
It 2) can given threshold coefficient and recycle ratio；
3) has internal clocking program；
4) program can complete the functions such as simple comparison, addition subtraction multiplication and division operation.

Claims (4)

1. a kind of opportunity of wheat stalk producing methane, the system included: strainer from the uniform feed supplement automatic control system determined (4), fermentation liquid goes out to recycle pump conduit (7), wheat stalk feed supplement into circulation pump conduit (5), fermentation liquid circulation pump (6), fermentation liquid The uniform bulk cargo outlet (12) of tank (8), feed supplement solenoid valve (9), feed supplement amount label (10), electronic control unit (11), feed supplement tank, binder are living Plug link assembly (14), stepper motor (15), straw powder uniformly discharge sieve (16), gas flow sensor (17), methane concentration Sensor (18).
It is characterized in that:
The system is small to former fermentation vat (1) change, and fermentation liquid need to be only opened up on fermentation vat (1) into circulation pump conduit (5) and is sent out Zymotic fluid, which goes out, recycles pump conduit (7) screw thread, and produces in fermentation vat and open up gas flow sensor (17) on gas export pipeline (19) With the mounting hole of (18) two sensors of methane gas concentration sensor.
Into circulation pump conduit (5), one end protrudes into fermentation vat (1) fermentation liquid, and is threadedly coupled with fermentation vat (1).
Fermentation liquid goes out to recycle pump conduit (7), and one end protrudes at fermentation vat (1) separate fermentation vat waste outlet (3), the end cloth It sets straw powder and uniformly discharges sieve (16), having diameter thereon is 3~5 times of relief hole of wheat stalk average length.
Wheat stalk feed supplement tank (8) is equipped with feed supplement amount label 10, and end is that the uniform bulk cargo of feed supplement tank exports (12).Feed supplement tank Uniform bulk cargo outlet (12), is made of 8 incorgruous hole exits, and diameter is 3~5 times of wheat stalk average length.
Stepper motor (15) is connected by binder piston rod part (14) with wheat stalk feed supplement tank (8).
2. a kind of opportunity of wheat stalk producing methane according to claim 1 automatically controls system from the uniform feed supplement determined System, it is characterized in that:
Electronic control unit (11) is connect with gas flow sensor (17), sensing methane concentration device (18), acquisition gas flow sensing Device signal and sensing methane concentration device signal；It is connect with feed supplement solenoid valve (9), controls the opening and closing of feed supplement solenoid valve (9)； It is connect with stepper motor (15), controls stepper motor (15) revolving speed.
3. a kind of opportunity of wheat stalk producing methane according to claim 1 automatically controls system from the uniform feed supplement determined System, it is characterized in that:
Operational process includes the following steps:
Step 1, gas flow sensor (17) signal of feed supplement automatic control system timing acquiring and concentration of methane gas pass Sensor (18) signal obtains fermentation vat and produces methane total flow Q at gas export pipeline (19)Methane is surveyedAnd methane concentration CMethane is surveyed。
Step 2, to whether feed supplement being needed to judge:
Electronic control unit (11) compares current fermentation vat and produces methane total flow Q at gas export pipeline (19)Methane is surveyedWith electronic control unit (11) The fermentation vat of storage inside produces the methane total flow design value Q at gas export pipeline (19)Methane is set
Situation a:QMethane is surveyed< k1×QMethane is set, k1For threshold coefficient, 0.6~0.8 is taken, fermentation vat (1) needs feed supplement, enters step three.
Situation b: other situations, fermentation vat (1) do not need feed supplement, return step one.
Step 3, electronic control unit (11) calculate wheat stalk feed supplement amount mWheat stalk, feed supplement solenoid valve (9) open, stepper motor (15) (6) working time T and stepper motor (15) stepping rate v is pumped with fermentation liquid circulation.
Step 4, the parameter that electronic control unit (11) is calculated according to step 3: feed supplement solenoid valve (9) unlatching, stepper motor (15) and the stepping rate v of fermentation liquid circulation pump (6) working time T and stepper motor (15), sending control signal to feed supplement Solenoid valve (9), stepper motor (15) and fermentation liquid circulation pump (6).
Step 5, feed supplement solenoid valve (9) execute the open command of electronic control unit (11)；Fermentation liquid circulation pumps (6) and executes automatically controlled list The operating order of first (11)；Stepper motor (15) executes the operating order of electronic control unit (11), stepping rate v.
Step 6 after electronic control unit (11) timing to T, issues control signal to feed supplement solenoid valve (9), stepper motor (15) and hair Zymotic fluid circulating pump (6) closes feed supplement solenoid valve (9), stepper motor (15) and fermentation liquid circulation pump (6), and feed supplement terminates, and returns to step Rapid one.
4. a kind of opportunity of wheat stalk producing methane according to claim 3 automatically controls system from the uniform feed supplement determined System, it is characterised in that:
In the step 3, electronic control unit (11) calculates wheat stalk feed supplement amount mWheat stalk, feed supplement solenoid valve (9) open, stepping electricity The stepping rate v of machine (15) and fermentation liquid circulation pump (6) working time T and stepper motor (15), calculation method are as follows:
Wherein, mWheat stalk is setIt is small for what is be added in wheat stalk feed supplement tank (8) for the first time to demarcate wheat stalk Quality Design value Wheat Straw quality.
Wherein, k2For recycle ratio, 0.2~3 is taken；VFermentation vatFor fermentation vat (1) total volume；(6) stream is pumped for fermentation liquid circulation Amount, fermentation liquid circulation pump (6) type selecting should meet pump flowIts pump liquid volume V per hour1h2V should be metFermentation vat≤V1h ≤5VFermentation vat；CMethane is setThe methane concentration design value at gas export pipeline (19) is produced for the fermentation vat of electronic control unit (11) storage inside, Generally take 0.4~0.6.
Wherein, ρWheat stalkFor the density of wheat stalk virgin material (13)；SFeed supplement tank cross sectionFor the cross section face of wheat stalk feed supplement tank (8) Product.
CN201910082898.4A 2019-01-25 2019-01-25 A kind of uniform feed supplement automatic control system that the opportunity of wheat stalk producing methane determines certainly Pending CN109593641A (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN110551609A (en) * 2019-09-26 2019-12-10 芜湖市科邦新能源科技有限公司 Little biomass fuel fermentation conversion reaction equipment
CN111471586A (en) * 2020-04-23 2020-07-31 李锦记（新会）食品有限公司 Remote automatic oil sleeving system and method in soy sauce production
CN117164401A (en) * 2023-11-01 2023-12-05 北京世纪农丰土地科技有限公司 Solid waste fermentation system of farmland straw

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Application publication date: 20190409