CN108690804A - Bio-natural gas production system and control method - Google Patents
Bio-natural gas production system and control method Download PDFInfo
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- CN108690804A CN108690804A CN201810613227.1A CN201810613227A CN108690804A CN 108690804 A CN108690804 A CN 108690804A CN 201810613227 A CN201810613227 A CN 201810613227A CN 108690804 A CN108690804 A CN 108690804A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000003345 natural gas Substances 0.000 title claims abstract description 16
- 238000004891 communication Methods 0.000 claims abstract description 38
- 238000000855 fermentation Methods 0.000 claims abstract description 36
- 230000004151 fermentation Effects 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 238000005273 aeration Methods 0.000 claims abstract description 16
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 10
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 238000000926 separation method Methods 0.000 claims abstract description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims abstract description 7
- 239000001301 oxygen Substances 0.000 claims abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 7
- 238000003860 storage Methods 0.000 claims abstract description 6
- 238000004064 recycling Methods 0.000 claims abstract description 4
- 238000004378 air conditioning Methods 0.000 claims description 23
- 230000020477 pH reduction Effects 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- 238000005057 refrigeration Methods 0.000 claims description 4
- 238000012795 verification Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 claims description 3
- 230000023556 desulfurization Effects 0.000 claims description 3
- 239000013307 optical fiber Substances 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 2
- 239000000872 buffer Substances 0.000 claims description 2
- 239000000470 constituent Substances 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims description 2
- 230000007774 longterm Effects 0.000 claims description 2
- 230000004888 barrier function Effects 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 239000002002 slurry Substances 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 210000004209 hair Anatomy 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 206010019909 Hernia Diseases 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000016383 Zea mays subsp huehuetenangensis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 239000002154 agricultural waste Substances 0.000 description 1
- 239000010828 animal waste Substances 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 235000009973 maize Nutrition 0.000 description 1
- 239000003895 organic fertilizer Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
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- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/58—Reaction vessels connected in series or in parallel
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- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
- C12M29/06—Nozzles; Sprayers; Spargers; Diffusers
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- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
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- 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
- C12M41/12—Means for regulation, monitoring, measurement or control, e.g. flow regulation of temperature
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/26—Means for regulation, monitoring, measurement or control, e.g. flow regulation of pH
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- 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
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- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
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- C12M41/48—Automatic or computerized control
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- C12M47/00—Means for after-treatment of the produced biomass or of the fermentation or metabolic products, e.g. storage of biomass
- C12M47/18—Gas cleaning, e.g. scrubbers; Separation of different gases
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- C12Q3/00—Condition responsive control processes
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- 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
The present invention relates to production system field more particularly to bio-natural gas production systems and control method.Fermentation tank stretches out pipeline and is connected to booster fan, also includes Aeration fan, Aeration fan connection then can be inside fermentation tank;The pipeline that booster fan stretches out is connected to desulfurizing tower, and desulfurizing tower is connected to equipment for purifying, and equipment for purifying is connected to surge tank;Surge tank is connected to recycling can;The desulfurizing tower is connected to gas cylinder;Fermentation tank is connected to be separated by solid-liquid separation tank;The temperature sensor that includes inside fermentation tank, pressure sensor, oxygen content sensor, PH sensor;It include flow sensor on pipeline;Sensing system communication link then controls part in PLC;Booster fan, Aeration fan Switch Communication be connected to control part in PLC;Section communication is controlled in PLC is connected to CPU and storage section and display;Display being capable of display monitoring picture;Storage section can store data.
Description
Technical field
The present invention relates to production system field more particularly to bio-natural gas production systems and control method.
Background technology
Traditional control needs worker's execute-in-place, since field device is excessive, more disperses, can lost labor, increase
Labor intensity.Since in operation, worker is according to personal experience, and different people is different to production control accuracy, this is resulted in
Gas producing efficiency is different in production process.Simultaneously in biogas generating process, the biogas and hydrogen sulfide of spilling can be to execute-in-place people
Member generates serious harm.
It is mostly originally field control, with the development of DCS system, pharmacy producer also gradually requires to collect these air-conditionings
Middle monitoring does not do control system, and the communications protocol of air-conditioning itself is also mostly non-since production equipment is only done by air-conditioning producer
Mark, existing host computer configuration software cannot be satisfied, and mating control system producer can only use VB, VC to develop monitoring programme.
When air-conditioning quantity increases, resulting in pharmacy producer thermal control personnel can not change this program, can only ask the software people of profession again
Member writes modification debugging, increases expense and period.
Invention content
The purpose of invention:In order to provide a kind of effect preferably novel hernia bandage, specific purposes are shown in specific implementation part
Multiple substantial technological effects.
In order to reach purpose as above, the present invention adopts the following technical scheme that:
Bio-natural gas production system, which is characterized in that production system include multiple fermentation tanks being arranged in juxtaposition, it is multiple simultaneously
The fermentation tank of row arrangement stretches out pipeline and is connected to booster fan, also includes Aeration fan, Aeration fan connection then can be in fermentation tank
Portion;The pipeline that booster fan stretches out is connected to desulfurizing tower, and the pipeline that desulfurizing tower stretches out is connected to equipment for purifying, and equipment for purifying passes through
Pipeline is connected to surge tank;It buffers tank connected pipeline and is connected to recycling can;The desulfurizing tower is connected to gas cylinder by pipeline;
Fermentation tank is connected to be separated by solid-liquid separation tank;
Also include sensing system, sensing system includes:Temperature sensor, the pressure sensing for including inside fermentation tank
Device, oxygen content sensor, PH sensor;It include flow sensor on pipeline;Sensing system communication link then control portion in PLC
Point;
Booster fan, Aeration fan Switch Communication be connected to control part in PLC;
Section communication is controlled in PLC is connected to CPU and storage section and display;Display being capable of display monitoring picture;
Storage section can store data.
The further technical solution of the present invention is, according to situation in fermentation tank, timely feeding, discharge;Control Aeration fan
Run time ensures acidification pool oxygen content;Fermentation tank exports biogas constituent analysis, qualified through desulphurization plant desulfurization;Biogas is through carrying
After pure equipment, CH4 ingredients reach 95% or more;Fermentation tank discharge enters separation of solid and liquid tank, according to 4 separation of liquid level automatic start-stop
Machine;Biogas pressure before control equipment for purifying, meets equipment for purifying service requirement;When equipment for purifying disorderly closedown, automatically by natural pond
Autogenous cutting shifts to bypass progress torch and diffuses burning.
The control method of bio-natural gas production system, which is characterized in that produced using bio-natural gas as described above
System;Also include following setting and step,
1 set of PLC master station is located at switchgear house, and 1 set of PLC substations are located at tank bottom equipment room;Monitor Computer Control System configures two sets,
Optical-fibre communications is used between Central Control Room, with PLC for three layers positioned at office building;
Ethernet communication is used between PLC master station and equipment for purifying;
PLC master station is communicated with compression device using profibus;
It is communicated using RS485modbus between PLC master station and dry and cold machine;
Can intuitively reflect entire production procedure on host computer picture, including valve, stirring, Aeration fan, booster fan,
Screw pump, the operating status of solid-liquid separating machine, meter parameter.
The further technical solution of the present invention is, also includes the step of control by PLC system, can be according to technique
Situation realizes the control to all devices;It is required according to equipment for purifying, PID control booster fan makes its outlet pressure maintain
8KPa;Intuitive monitoring purification, compressor apparatus operating status, realize a distant place control.
The further technical solution of the present invention is, also includes setting interlocking item the step of control by PLC system
Part prevents maloperation;The feed liquid controlled in fermentation tank is stablized between height limits;Realize the automatic startup of solid-liquid separating machine, root
2,3 or 4 separation of solid and liquid tanks and seperator are respectively started according to hopper level condition, equipment loop start extends
Service life;Control acidification pit level, stops discharging when reaching low level;Control homogenate pit level, when attaining to a high place, stops fermentation
Tank discharges.
The further technical solution of the present invention is, when occurring alarming or when failure, have prompt on monitored picture;For existing
There is parameter in place, such as temperature, pressure, flow, monitored picture are respectively provided with tendency chart, facilitate observation Long-term change trend;It preserves simultaneously
All data, at least a year can export excell files, facilitate access.
The further technical solution of the present invention is, also includes the step of control the air-conditioning system in system,
Air-conditioner set communication mostly uses RS485 modes, and agreement uses off-gauge Modbus AscII;Communication baud rate is
9600,1 start bits, 8 data bit, 1 stop bits, no parity;Computer is host computer when normal, under air conditioner is
Position machine;Start air conditioner and be in reception state, when communication, side's transmission data waits for the feedback of another party, after being sent completely etc.
To be received, after having correctly received the data for sending back and, both sides return to reset condition;System configuration
Increase by 2 port Siemens CPU226CN modules;
Port0 connects live air-conditioner set by RS485 buses;
Port1 connection host computers;
Host computer uses KingView software;
System function is realized:
Host computer sends 15 byte control instructions to air-conditioning, and communication format is as follows:
0th byte:First code, computer are sent to air conditioner and are fixed as 0xAA;
1st byte:Air-conditioning address;
2nd byte:Start and close order;
3rd byte:Control operating modes of air conditioner;
4th byte:Indoor set temperature;
5th byte:Indoor setting humidity value;
6th byte:It is Two-channel switching time interval when computer is to Centralized Controller;
7th byte:Retain;
8th byte:Retain;
9th byte:Set wind blade position;
10th byte:Set indoor air velocity;
11st byte:Retain;
12nd byte:Retain;
13rd byte:Retain;
14th byte:Verification and;
After air-conditioning receives host computer instruction, 15 byte instructions are fed back to host computer, communication format is as follows:
0th byte:First code, air conditioner are sent to computer and are fixed as 0x55;
1st byte:Air-conditioning address;
2nd byte:Air-conditioner set state;
3rd byte:The air-conditioner set method of operation;
4th byte:Indoor actual temperature;
5th byte:Indoor actual humidity;
6th byte:Outdoor environment temperature;
7th byte:Current indoor coil temperature;
8th byte:Current outdoor coil temperature;
9th byte:Wind blade current location;
10th byte:Air-conditioner set actual wind speed;
11st byte:Outdoor fan current state;
12nd byte:Guard mode mark;
13rd byte:Failure code;
14th byte:Verification and;
According to communication protocol,
When setting booting, refrigeration mode, 24 degree of set temperature, transmission data is answered as follows:
AA 00 10 20 18 00 00 00 00 00 00 00 00 00 CD
Air-conditioning is replied:Indoor booting, refrigeration mode set 24 degree, and the temperature such as inner ring are 24 degree, outside inner blower compressor
55 00 01 02 48 18 18 18 18 00 01 11 00 00 ED of fan operation
S7-200PLC is programmed:
(5) S7-200 Free-port communications are the half-duplex operations based on RS485 communication infrastructures, therefore send and receive finger
Order is unable to simultaneously perform;
(6) port port0 is defined as Free-Mode, while corresponding communication baud rate and communication format is set, with
Air-conditioner set setting is consistent;
(7) definition sends, receives Data Data format;
(8) three air-conditioning data polling intervals 1.5s;
Host computer configuration programming, monitoring show three air-conditioning states.
Using the present invention of technical solution as above, have the advantages that compared with the existing technology:1) according to technological design,
It realizes fermentation tank timing feeding, discharging, realizes the best solid-liquid match ratio of biogas slurry.2) by PID control fermentation jar temperature 40
DEG C or so, PH in faintly acid, realize that biogas is happened at suitable environment;3) time opening fermentation tank circulating pump, by tank body upper layer natural pond
Liquid squeezes into lower layer, opens stirring, ensures that each orientation biogas slurry solid-to-liquid ratio is unanimous on the whole in tank;4) control acidification pool liquid temperature and
PH meets reaction bacterium and breeds under the best conditions;5) acidification pool aeration time is controlled, it is ensured that the amount of oxygen that reaction bacterium needs;6)
Since PLC program is write in strict accordance with producting rule, it can prevent staff from occurring maloperation;7) when failure signal,
System can warning reminding operating personnel immediately, ensure safety;8) by the long-time service of field device and system, work is fully met
Skill demand.Stable and reliable operation.
Description of the drawings
In order to further illustrate the present invention, it is further illustrated below in conjunction with the accompanying drawings:
Fig. 1 is production system schematic device of the present invention;
Fig. 2 charts for this production system air-conditioning part sub-control;Wherein:1. fermentation tank;2. booster fan;3. desulfurizing tower;4. carrying
Pure equipment;5. surge tank;6. recycling can;7. gas cylinder.
This attached drawing is the schematic diagram of present apparatus critical piece composition, does not represent the appearance and size, connection type, dress of the present invention
With form, position relationship etc., it is illustrated that partially manual valve, pipe fitting etc. is omitted.
Specific implementation mode
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated, it should be understood that following specific implementation modes are only
For illustrating the present invention rather than limiting the scope of the invention.It should be noted that word " preceding " used in the following description,
" rear ", "left", "right", "up" and "down" refer to that the direction in attached drawing, word "inner" and "outside" refer respectively to direction or remote
Direction from geometric center of specific component.
This patent provides a variety of concomitant regimens, in place of different expression, belong to modified scheme based on basic scheme or
It is parallel type scheme.Each scheme has the unique features of oneself.
Centralized-control center is arranged according to site technique situation in we, reduces execute-in-place as far as possible.It is live in conjunction with flag is pricked
Technique, PLC (programmable controller) select Siemens S7-300 series of products, and modular construction is easily achieved point
The configuration of cloth and cost-effective, Electro Magnetic Compatibility is strong, concussion resistibility performance is good, makes it in extensive industrial control field
In, become a kind of not only economic but also realistic solution;Upper computer software selects the KingView of Beijing Ya Kong companies
Kingview6.55, this product provide configuration interface abundant, simple to use, and history curve, report and web issue work(
It can be substantially improved and improved, the functionality and availability of software are greatly improved.
System configuration
8,1 set of PLC master station is located at switchgear house, and 1 set of PLC substations are located at tank bottom equipment room;
9, Monitor Computer Control System configures two sets, is located at three layers of office building and uses optical-fibre communications between Central Control Room, with PLC;
10, ethernet communication is used between equipment for purifying;
11, it is communicated using profibus with compression device;
12, it is communicated using RS485modbus between dry and cold machine;
13, according to technological requirement, scene is mounted with the sensors such as temperature, pressure, flow, PH respectively;
The function that the automated system is mainly realized:
1, it can intuitively reflect entire production procedure, including various equipment (valve, stirring, aeration wind on host computer picture
Machine, booster fan, screw pump, solid-liquid separating machine) operating status, meter parameter;
2, the control to all devices can be realized according to process condition;
3, it is required according to equipment for purifying, PID control booster fan makes its outlet pressure maintain 8KPa or so;
4, intuitive monitoring purification, compressor apparatus operating status, realize a distant place control;
5, interlock condition is set, maloperation is prevented;The feed liquid controlled in fermentation tank is stablized between height limits;Realize solid-liquid
2,3 or 4 seperators are respectively started according to hopper level condition in the automatic startup of seperator, and equipment loop start prolongs
Long life;Control acidification pit level, stops discharging when reaching low level;Control homogenate pit level, when attaining to a high place, stops hair
Fermentation tank discharges;
6, according to setup parameter, when occurring alarming or when failure, have prompt on monitored picture;
7, tendency chart is respectively provided with for all parameters in scene, such as temperature, pressure, flow, monitored picture, observation is facilitated to become
Gesture changes;All data are preserved simultaneously, at least a year can export excell files, facilitate access;
Its system flow is as follows:
Advantages of the present invention
1) according to technological design, fermentation tank timing feeding, discharging is realized, realizes the best solid-liquid match ratio of biogas slurry.
2) by PID control fermentation jar temperature in 40 DEG C or so, PH in faintly acid, realize that biogas is happened at suitable environment;
3) tank body upper layer biogas slurry is squeezed into lower layer, opens stirring, ensures each orientation in tank by time opening fermentation tank circulating pump
Biogas slurry solid-to-liquid ratio is unanimous on the whole;
4) temperature and PH for controlling acidification pool liquid meet reaction bacterium and breed under the best conditions;
5) acidification pool aeration time is controlled, it is ensured that the amount of oxygen that reaction bacterium needs;
6) it is write in strict accordance with producting rule due to PLC program, can prevent staff from maloperation occur;
7) when failure signal, system can warning reminding operating personnel immediately, ensure safety;
8) by the long-time service of field device and system, process requirements are fully met.Stable and reliable operation.
This patent is using experiment, using advanced efficient anaerobic fermentation technology to local abundant agricultural organic waste
(maize straw and animal wastes) carry out biogas fermentation, and it is natural can to produce 20,000 sides biology after the produced purified compression of biogas daily
Gas.So that agricultural wastes is recycled, reduce the environmental problem that crop straw burning is brought, while local agricultural can be effectively reduced
The use of agriculture chemical in production promotes to prick the sound development of flag agricultural.
Whole system includes pretreatment of raw material and feed system, CSTR anaerobic fermentation tanks and mating separation of solid and liquid system
A whole set of bio-natural gas production equipment such as system, marsh gas purifying purification system and methane utilizing system, and the same period one life of construction
Organic fertilizer workshop and a set of seedling-cultivation plate production line.
Airconditioning control part:1) system uses 200 free-port communication of Siemens, communication data format oneself definition convenient
Programming.
2) Siemens's series of PLC is applied very wide at the scene, and live thermal control personnel can oneself modification by simple training
Program.
3) host computer configuration software selects domestic KingView, powerful, easy to learn.
It is clear that the technique effect that the above structure is realized is realized, if the additional technical solution is not taken into account, this patent title is also
Can be a kind of PlC control methods.It is not shown in figure part details.
It should be noted that multiple schemes that this patent provides include the basic scheme of itself, independently of each other, not mutually
It restricts, but it can also be combined with each other in the absence of conflict, reach multiple effects and realize jointly.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of this field
Personnel should be recognized that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this hairs
Bright principle, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these variations
It is both fallen in claimed range with improving.
Claims (7)
1. bio-natural gas production system, which is characterized in that production system includes multiple fermentation tanks (1) being arranged in juxtaposition, multiple
The fermentation tank (1) being arranged in juxtaposition stretches out pipeline and is connected to booster fan (2), also includes Aeration fan, and Aeration fan connection then can
Inside fermentation tank;The pipeline that booster fan (2) stretches out is connected to desulfurizing tower (3), and the pipeline that desulfurizing tower (3) stretches out is connected to purify
Equipment (4), equipment for purifying (4) are connected to surge tank by pipeline;It buffers tank connected pipeline and is connected to recycling can (6);It is described
Desulfurizing tower (3) gas cylinder is connected to by pipeline;Fermentation tank is connected to be separated by solid-liquid separation tank;
Also include sensing system, sensing system includes:Temperature sensor, pressure sensor, the oxygen for including inside fermentation tank
Gas content sensor, PH sensor;It include flow sensor on pipeline;Sensing system communication link then controls part in PLC;
Booster fan (2), Aeration fan Switch Communication be connected to control part in PLC;
Section communication is controlled in PLC is connected to CPU and storage section and display;Display being capable of display monitoring picture;Storage
Part can store data.
2. bio-natural gas production system as described in claim 1, which is characterized in that according to situation in fermentation tank, in time on
Material, discharge;Aeration fan run time is controlled, ensures acidification pool oxygen content;Fermentation tank exports biogas constituent analysis, is set through desulfurization
Standby desulfurization is qualified;After the purified equipment of biogas, CH4 ingredients reach 95% or more;Fermentation tank discharge enters separation of solid and liquid tank, according to
4 seperators of liquid level automatic start-stop;Biogas pressure before control equipment for purifying, meets equipment for purifying service requirement;Work as equipment for purifying
When disorderly closedown, biogas is switched into bypass progress torch automatically and diffuses burning.
3. the control method of bio-natural gas production system, which is characterized in that given birth to using bio-natural gas described in claim 1
Production system;Also include following setting and step,
1 set of PLC master station is located at switchgear house, and 1 set of PLC substations are located at tank bottom equipment room;Monitor Computer Control System configures two sets, is located at
Three layers of office building uses optical-fibre communications between Central Control Room, with PLC;
1, ethernet communication is used between PLC master station and equipment for purifying;
2, PLC master station and compression device are communicated using profibus;
3, it is communicated using RS485modbus between PLC master station and dry and cold machine;
It can intuitively reflect entire production procedure, including valve, stirring, Aeration fan, booster fan, screw rod on host computer picture
Pump, the operating status of solid-liquid separating machine, meter parameter.
4. the control method of bio-natural gas production system as claimed in claim 3, which is characterized in that also include to pass through PLC
The step of system is controlled can realize the control to all devices according to process condition;It is required according to equipment for purifying, PID
Booster fan is controlled, its outlet pressure is made to maintain 8KPa;Intuitive monitoring purification, compressor apparatus operating status, realize remote
Side's control.
5. the control method of bio-natural gas production system as claimed in claim 3, which is characterized in that also include to pass through PLC
The step of system is controlled is arranged interlock condition, prevents maloperation;The feed liquid in fermentation tank is controlled to stablize in height limit
Between;The automatic startup for realizing solid-liquid separating machine, 2,3 or 4 separation of solid and liquid are respectively started according to hopper level condition
Tank and seperator, equipment loop start, prolong the service life;Control acidification pit level, stops discharging when reaching low level;Control
It is homogenized pit level, when attaining to a high place, stops fermentation tank discharging.
6. the control method of bio-natural gas production system as claimed in claim 3, which is characterized in that when occur alarming or therefore
When barrier, there is prompt on monitored picture;All parameters in scene, such as temperature, pressure, flow, monitored picture are respectively provided with
Gesture figure facilitates observation Long-term change trend;All data are preserved simultaneously, at least a year can export excell files, facilitate access.
7. the control method of bio-natural gas production system as claimed in claim 3, which is characterized in that also include in system
Air-conditioning system the step of being controlled,
Air-conditioner set communication mostly uses RS485 modes, and agreement uses off-gauge Modbus AscII;Communication baud rate is
9600,1 start bits, 8 data bit, 1 stop bits, no parity;Computer is host computer when normal, under air conditioner is
Position machine;Start air conditioner and be in reception state, when communication, side's transmission data waits for the feedback of another party, after being sent completely etc.
To be received, after having correctly received the data for sending back and, both sides return to reset condition;
System configuration
4, increase by 2 port Siemens CPU226CN modules;
5, Port0 connects live air-conditioner set by RS485 buses;
6, Port1 connections host computer;
7, host computer uses KingView software;
System function is realized:
Host computer sends 15 byte control instructions to air-conditioning, and communication format is as follows:
0th byte:First code, computer are sent to air conditioner and are fixed as 0xAA;
1st byte:Air-conditioning address;
2nd byte:Start and close order;
3rd byte:Control operating modes of air conditioner;
4th byte:Indoor set temperature;
5th byte:Indoor setting humidity value;
6th byte:It is Two-channel switching time interval when computer is to Centralized Controller;
7th byte:Retain;
8th byte:Retain;
9th byte:Set wind blade position;
10th byte:Set indoor air velocity;
11st byte:Retain;
12nd byte:Retain;
13rd byte:Retain;
14th byte:Verification and;
After air-conditioning receives host computer instruction, 15 byte instructions are fed back to host computer, communication format is as follows:
0th byte:First code, air conditioner are sent to computer and are fixed as 0x55;
1st byte:Air-conditioning address;
2nd byte:Air-conditioner set state;
3rd byte:The air-conditioner set method of operation;
4th byte:Indoor actual temperature;
5th byte:Indoor actual humidity;
6th byte:Outdoor environment temperature;
7th byte:Current indoor coil temperature;
8th byte:Current outdoor coil temperature;
9th byte:Wind blade current location;
10th byte:Air-conditioner set actual wind speed;
11st byte:Outdoor fan current state;
12nd byte:Guard mode mark;
13rd byte:Failure code;
14th byte:Verification and;
According to communication protocol,
When setting booting, refrigeration mode, 24 degree of set temperature, transmission data is answered as follows:
AA 00 10 20 18 00 00 00 00 00 00 00 00 00 CD
Air-conditioning is replied:Indoor booting, refrigeration mode set 24 degree, and the temperature such as inner ring are 24 degree, the outer wind turbine of inner blower compressor
Run 55 00 01 02 48 18 18 18 18 00 01 11 00 00 ED
S7-200 PLC programmings:
(1) S7-200 Free-port communications are the half-duplex operations based on RS485 communication infrastructures, therefore send and receive instruction not
It can be performed simultaneously;
(2) port port0 is defined as Free-Mode, while corresponding communication baud rate and communication format is set, with air-conditioning
Unit setting is consistent;
(3) definition sends, receives Data Data format;
(4) three air-conditioning data polling intervals 1.5s;
Host computer configuration programming, monitoring show three air-conditioning states.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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