CN101503635B - Control device for oxygenation intermittent coal gas preparation - Google Patents
Control device for oxygenation intermittent coal gas preparation Download PDFInfo
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- CN101503635B CN101503635B CN2009100610209A CN200910061020A CN101503635B CN 101503635 B CN101503635 B CN 101503635B CN 2009100610209 A CN2009100610209 A CN 2009100610209A CN 200910061020 A CN200910061020 A CN 200910061020A CN 101503635 B CN101503635 B CN 101503635B
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention discloses an oxygen enrichment intermittent coal gas preparation control device, which comprises an air compression tank, a coal gas producer and a control system. In the control system of the device, an embedded control station is connected with a magnetic oxygen analyzer, an infrared CO/CO2 analyzer, a thermal conductivity hydrogen analyzer, a pneumatic diaphragm control valve and an automaton respectively, and the magnetic oxygen analyzer, the infrared CO/CO2 analyzer and the thermal conductivity hydrogen analyzer are connected with the coal gas producer respectively. The device adopts a quality feedback principle to determine the oxygen concentration in oxygen-enriched air and the oxygen enrichment time according to reference elements such as compositions of blown gas or uplink and downlink coal gas, the producer temperature and the like, adopts a feedforward plus feedback algorithm and an adjustment link to ensure the adjustability and stability of oxygen enriched concentration, and realizes data communication by connecting the Ethernet with production local area networks inside enterprises in an OPC mode.
Description
Technical field
The present invention relates to a kind of gas preparation device, relate to a kind of oxygenation intermittent coal gas more specifically and prepare control device.
Background technology
Traditional fixed bed (UGI stove) gas preparation technology was continued to use more than 100 year.Its production control system adopted former external supporting hydraulic pressure---mechanical type automat basically before the 1980s, progressively substituted by the electronic type of domestic-developed----oil pressure automat after the eighties.
The characteristics of its technology are with the coal cinder of air through burning, it is fully burnt reaches certain temperature, then with steam through scorching hot coal seam, carry out following chemical reaction with carbon (C) in the coal, produce CO and H
2
H
2O+C→CO+H
2
2H
2O+C→CO
2+2H
2
Air is a themopositive reaction through the coal seam, and steam produces coal gas (CO, CO through scorching hot coal
2And H
2) then be a thermonegative reaction.Therefore in order to produce sustainably, said process must hocket repeatedly.From Sustainable Production and safety, whole gas preparation process can be divided into following five little processes, that is:
Blowing (air makes coal combustion and intensification)
On blow (blow on the steam through coal seam produce coal gas)
Under blow (blow under the steam through coal seam produce coal gas)
Blow (replaced the coal gas of gas stove bottom from security consideration with steam, and blown generation coal gas on the steam once more) on the secondary
Blow off (air blasts from furnace bottom, and coal gas of being produced and nitrogen recycling are entered system, is " blowing " once more condition all set simultaneously)
The enforcement in these five stages is to lean on the switching of a series of valves to carry out; And from the supporting hydraulic pressure of original UGI stove--the widely used up till now electronic type of mechanical type automat---hydraulic pressure automat, its basic function is exactly to control the start and stop of this a whole set of automatic valve with programme controlled method.Like the appearance peak in Hunan, the ternary in Anhui, the grand automat that waits of the moral in Shijiazhuang.Secondly, for the operation of optimizing coal steam stove, some electronic type---hydraulic pressure automat has been introduced some point for measuring temperature of gas stove; Through means such as fuzzy controls; Look to the time in above-mentioned five stages of adjustment,, but all do not obtain desirable stable effect so that the operation of gas stove is optimized.In addition, the purpose of making coal gas owing to chemical fertilizer factory is for synthetic ammonia, i.e. N
2+ 3H
2→ 2NH
3H wherein
2Be the CO+H from coal gas
2Be transformed N
2Then be from the 5th system the blowing off of gas stage, and in upper and lower blowing, in steam, introduce portion of air and obtain.In order to make follow-up synthesizing section H
2: N
2=3: 1 requirement needs the above-mentioned air addition of control promptly to implement so-called hydrogen nitrogen than regulating.
Present electronic type---oil pressure automat mostly disposes hydrogen nitrogen than regulating but because the variation of air capacity can exert an influence to the working of a furnace of gas stove self, therefore can play the effect that the working of a furnace is worsened sometimes on the contrary, thereby not have real head it off.
Therefore present electronic type--the main function of-oil pressure automat is that the program control of five stages of implementing gas preparation then still lacks effective measures to stable furnace condition and aspects such as improving system gas intensity.Oxygenation intermittent coal gas preparation technology is that to have caught the key of gas preparation be the thermal equilibrium of gas stove, if can make gas stove can under higher temperature, keep the balance of furnace temperature, then must improve steam decomposition rate greatly and improve system gas intensity, economizes on coal and reduces CO
2Discharging with sulfide.Its essential measure be blowing, blow off and on blow, blow down the concentration that in air, increases oxygen opportune moment in stage.Confirm the addition of oxygen and the time scale in each stage of adjustment based on the composition in system each stage of gas simultaneously, fundamentally strengthen and optimized the production of gas burner.
In order to implement oxygenation intermittent coal gas preparation technology, must solve:
1, formulates a whole set of oxygenation intermittent coal gas preparation technology's production control method of operating.
2, make the control system that a cover can be accomplished aforementioned production method.
The function of this cover control system is:
1, combines original electronic type----oil pressure automat to be in due course and add the oxygenation air of variable concentrations.The oxygen concentration of air main and blow the oxygen concentration that adds the nitrogen arm when blowing gas up and down up and down when promptly guaranteeing to blow off.
2, according to quality (CO, the CO of up-downgoing coal gas
2, H
2) and single stove steam flow, the indirect analysis steam decomposition rate.And the oxygenation concentration when combining furnace temperature to confirm to blow up and down and the addition of steam.
3, according to the composition in the blowing-out gas (CO, CO
2) or composition (CO, the CO in the coal gas when blowing off
2, H
2), and combine furnace temperature to confirm to blow off and the airborne oxygen concentration of oxygenation and duration of blowing off and drying when drying.
4, adjust single stove production efficiency and consumption indicators.
5, sending scheduling or data designated process computer through Ethernet with relevant data is that the production management of enterprise provides required data.
The present invention aims to provide the perfect oxygenation intermittent coal gas of a cover and prepares control device, and this a whole set of production control method is the electronic type of present gas preparation with the control equipment--and-oil pressure automat is not available, does not also have similar products like abroad.
Summary of the invention
The purpose of this invention is to provide a kind of oxygenation intermittent coal gas and prepare control device.Reliability height, realization be (putting into operation), reduced investment, instant effect easily.
For realizing the present invention, adopt following technical scheme:
A kind of oxygenation intermittent coal gas prepares control device, comprises air compression tank, producer gas generator and control system, in its control system:
No. 1 the embedded Control station is connected with No. 5 magnetic oxygen analyser AT-001, No. 5 pneumatic diaphragm control valve AV-001 respectively, and No. 5 magnetic oxygen analyser AT-001, No. 5 pneumatic diaphragm control valve AV-001 all are connected with the air mixed jar;
No. 1 the embedded Control station is connected with No. 1 magnetic oxygen analyser AT-101, No. 1 pneumatic diaphragm control valve AV-101, No. 1 automat respectively, and No. 1 magnetic oxygen analyser AT-101, No. 1 pneumatic diaphragm control valve AV-101, No. 1 automat all are connected with No. 1 producer gas generator;
No. 1 the embedded Control station is connected with No. 2 magnetic oxygen analyser AT-201, No. 2 pneumatic diaphragm control valve AV-201, No. 2 automats respectively, and No. 2 magnetic oxygen analyser AT-201, No. 2 pneumatic diaphragm control valve AV-201, No. 2 automats all are connected with No. 2 producer gas generators;
No. 1 the embedded Control station is connected with No. 3 magnetic oxygen analyser AT-301, No. 3 pneumatic diaphragm control valve AV-301, No. 3 automats respectively, and No. 3 magnetic oxygen analyser AT-301, No. 3 pneumatic diaphragm control valve AV-301, No. 3 automats all are connected with No. 3 producer gas generators;
No. 1 the embedded Control station is connected with No. 4 magnetic oxygen analyser AT-401, No. 4 pneumatic diaphragm control valve AV-401, No. 4 automats respectively, and No. 4 magnetic oxygen analyser AT-401, No. 4 pneumatic diaphragm control valve AV-401, No. 4 automats all are connected with No. 4 producer gas generators;
No. 1 embedded Control station (4) is connected with No. 1 infrared CO analyser AT-102a, and No. 1 infrared CO analyser AT-102a is connected with No. 1 producer gas generator, No. 2 producer gas generators, No. 3 producer gas generators, No. 4 producer gas generators respectively;
No. 1 embedded Control station (4) and No. 1 infrared CO
2Analyser AT-102b connects, No. 1 infrared CO
2Analyser AT-102b is connected with No. 1 producer gas generator, No. 2 producer gas generators, No. 3 producer gas generators, No. 4 producer gas generators respectively;
No. 1 embedded Control station (4) is connected with No. 1 heat-conducted hydrogen analyzer AT-102c, and No. 1 heat-conducted hydrogen analyzer AT-102c is connected with No. 1 producer gas generator, No. 2 producer gas generators, No. 3 producer gas generators, No. 4 producer gas generators respectively;
No. 1 embedded Control station (4) is connected with No. 2 infrared CO analyser AT-103a, and No. 2 infrared CO analyser AT-103a is connected with No. 1 producer gas generator, No. 2 producer gas generators, No. 3 producer gas generators, No. 4 producer gas generators respectively;
No. 1 embedded Control station (4) and No. 2 infrared CO
2Analyser AT-103b connects, No. 2 infrared CO
2Analyser AT-103b is connected with No. 1 producer gas generator, No. 2 producer gas generators, No. 3 producer gas generators, No. 4 producer gas generators respectively;
Many embedded Control stations can connect through Ethernet.
Wherein: magnetic oxygen analyser (AT-001) is used for the oxygen analysis, and infrared CO analyser (AT-102a) is used for the CO change and send infrared CO
2Analyser (AT-102b) is used for CO
2Change is sent, and heat-conducted hydrogen analyzer (AT-102c) is used for H
2Change is sent, and infrared CO analyser (AT-103a) is used for the CO change and send infrared CO
2Analyser (AT-103b) is used for CO
2Change is sent; Magnetic oxygen analyser (AT-101) is used for the analysis of 1# gas stove oxygen concentration, and magnetic oxygen analyser (AT-201) is used for the analysis of 2# gas stove oxygen concentration, and magnetic oxygen analyser (AT-301) is used for the analysis of 3# gas stove oxygen concentration; Magnetic oxygen analyser (AT-401) is used for the analysis of 4# gas stove oxygen concentration
Stage signal is gathered wiring diagram such as Fig. 2 of embedded workstation, analyser, program control solenoid valve, hydraulic pressure stop valve in the link; Program control solenoid valve is connected with analyser with embedded workstation respectively through relay; The hydraulic pressure stop valve is connected with program control solenoid valve, by program control solenoid control.
The characteristics of this control system are following:
1) keep original electronics--the fluid pressure type automat, with its program control instrument as original five stages of system gas of enforcement.
2) per four gas generators are a production unit, a cover oxygenation intermittent coal gas is set prepares dedicated control device, and the program by means of communication regulation and control electronics-fluid pressure type automatic machine, like duration of setting the blowing stages such as grade etc.
3) blowing, on blow, blow down and in stove, add the oxygenation air on opportunity that the stage that blows off is suitable.
4) adopt the Quality Feedback principle, confirm the time of airborne oxygen concentration of oxygenation and oxygenation according to reference elements such as the composition of blowing-out gas or up-downgoing coal gas and furnace temperature.
5) the employing feedforward adds the algorithm and the governing loop of feedback, guarantees the adjustability and the stability of oxygenation concentration.
6) be connected with the production LAN of enterprises with the OPC mode through Ethernet, realize data communication.
Specifically consisting of of this control system:
1. embedded Control station.
Comprising embedded workstation and I/O station.Embedded workstation (also can adopt industrial computer or business computer, but the performance of the performance of performance, particularly anti-adverse environment and anti-virus far can not satisfy the requirement of native system for the embedded computer of Ao Tai company exploitation.), be characterized in:
A) complete machine movement-less part and adopt the low power dissipation electron device, complete machine is made encapsulation process, is suitable for the such rugged surroundings of gas workshop (many dirt, humidity, corrosive gas environment, vibrations).
B) LINUX operating system and the operation platform of employing through cutting out, travelling speed is fast, the danger of basic virus-free infection.
C) can be connected with the Ethernet of enterprises as a node of LAN through the OPC interface, realize information sharing, not receive the danger of virus attack again basically.
I/O is made up of frame, I/O module, communication module, power supply and rack at the station.Wherein I/O adopts the RemoteI/O of Germany or homemade I/O series, can be selected based on user's demand.Communication and power supply are redundancy structure.Entire I/O mechanism is installed in the sealing cabinet of 800*600*1800.
1.1 hardware:
Storage medium: 64M～512M internal memory can be matched as required.
Communication interface: PS2 interface, RS232/485 interface and Ethernet interface.
Touch-screen (optional)
CPU(EP9315)
Power supply: AC220V 10%/DC 24V 10%, 3A.
Consumed power＜10W
Optional casing type of protection (common, moistureproof, dustproof, explosion-proof)
Optional casing form (desktop type, wall extension type, grounding, dish dress type, separation type)
1.2 software
Operating system: special-purpose Embedded Real-Time (SuSE) Linux OS.
Configuration software: special-purpose embedded configuration software.
1.3 function
Can realize network service, support the ICP/IP protocol of standard, can realize communication with the supervisory system with OPC interface (PLC, DCS, SCADA) of any opening.Link to each other with the main supervisory system (DCS/PLC) of enterprises through network at the scene, realize two-way data communication.
Can adopt redundant or nonredundant Ethernet structure as required.
Through taking the sealing and dustproof measure, embedded workstation can be installed in the abominable scene of environment.
If adopt explosion separation structure, can be installed in the place (II district) of requirement of explosion proof.
Adopt (SuSE) Linux OS and monitoring software, reliability is high, real-time, response speed soon (data and frame updating time＜500ms).
" industrial liquid crystal display, resolution are 640 * 480,800 * 600,1024 * 768, and brightness is 200,300 (cd/m to adopt industrial standard 15
2); Usable range is wide, and service condition is wide.Also can adopt the liquid crystal display of other specification as required.
1.4 products characteristics
For no floppy drive does not have the embedded computer of hard disk, volume is little.
Low power consumption CPU, no fan, Overall Power Consumption are low.
Complete machine does not have movable member, good reliability.
Network function is strong, can adopt Redundant Ethernet in case of necessity.
Adopt the main supervisory system communication that possesses the OPC interface of OPC technology and any opening, obtain all processes data, the both-way communication between realization and main supervisory system.
Adopt single task, stable extraordinary (SuSE) Linux OS, characteristics such as have after it is cut out, optimizes that system overhead is little, good stability, real-time be high, and the anti-virus ability is strong.When sudden power occurring, data can not lost, and can directly get into man machine operation interface behind the incoming call, and are simple to operate, are easy to safeguard.
Can load and move complicated software, like Optimization Software.
1.5 system gas stage signal of the present invention is gathered link
For realize drying, on blow, blow down and air that the stage that blows off adds certain oxygen concentration to realize oxygenation intermittent coal gas preparation technology, must gather the initial sum termination signal in each system gas stage of each stove in (or generation) four stoves.For this reason, can combine condition of different to adopt a kind of in following three kinds of methods:
A. the technology valve changeover program of every stove is generated and is carried out by control station, promptly replaces present electronics--the fluid pressure type automat, so each stage signal is the built-in variable in the application program in the control station.
B. keep original electronics--the fluid pressure type automat.With it as implementing the basic programme controlled means of valve.The relay contact signal in its each stage (or certain several solenoid valve) is introduced this ECS control station.
The c.ECS control station adopts the RS232 communication or OPC communication modes and electronics--the fluid pressure type automat interrelates, and sets up both-way communication.
1.6 compared with prior art the present invention has following tangible advantage:
(1) reduces the blowing heating-up time significantly, increase the system gas time;
The heat of carbon-coating improves steam decomposition rate when (2) increasing the steam decomposition;
(3) reduce the air gas discharging that blowing generates significantly, reduce the pollution of greenhouse gas and sulfide atmosphere.
(4) do not influence ordinary production in the technological transformation process basically, reduce the loss of stopping and transforming.
(5) go into the oxygen content of every increase one percentage point in the stove air in the gas-making process, carbon-coating has increased 55349kj/tNH in the gas-making process
3(13220Kcal/tNH
3) heat, make steam in higher furnace temperature, carry out decomposition reaction, improve gasification efficiency, save steam consumption.Reduce blow-time.
(6) adapt to colm and produce semiwater gas, the artificial briquette production of more favourable use reduces the Ammonia Production cost significantly.
(7) according to going into the variation of stove coal, adopt and regulate the airborne oxygen content optimization of stove automatically and stablize furnace temperature, make in the production run that the steam long-term stability decomposes under hot conditions.
(8) main procedure parameter comprises CO, CO in oxygen concentration, the up-downgoing coal gas
2, H
2, CO, CO in dropping a hint
2, key parameters such as furnace temperature, furnace pressure, steam in the boiler flow all have and show or control production management and operating personnel's easy master.
(9) blowing oxygenation and blow gas oxygenation up and down can be implemented step by step.
(10) gas composition of gas composition and traditional handicraft is approaching, and the downstream flow process need not transformed.
(11) reduced investment, system is simple, floor area is little, reliability is high, easy realization, with low cost.
Description of drawings
Fig. 1 prepares the control device structural drawing for a kind of oxygenation intermittent coal gas
Fig. 2 gathers the link wiring diagram for stage signal
Wherein: 1-5 magnetic oxygen analyser, 11-1 magnetic oxygen analyser, 12-2 magnetic oxygen analyser, 13-3 magnetic oxygen analyser, 14-4 magnetic oxygen analyser, 2-5 pneumatic diaphragm control valve, 21-1 pneumatic diaphragm control valve, 22-2 pneumatic diaphragm control valve, 23-3 pneumatic diaphragm control valve, 24-4 pneumatic diaphragm control valve, 31-1 automat, 32-2 automat, 33-3 automat, 34-4 automat, 12a-1 number infrared CO analyser, 12b-1 number infrared CO
2Analyser, 12c-1 number heat-conducted hydrogen analyzer, 13a-2 number infrared CO analyser, 13b-2 number infrared CO
2Analyser, 4-1 embedded Control station, 4a-2 embedded Control station, 4b-3 embedded Control station, 5-Ethernet, the embedded workstation of 6-, 7-analyser, the program control solenoid valve of 8-, 9-hydraulic pressure stop valve.
Embodiment
A kind of oxygenation intermittent coal gas prepares control device, comprises air compression tank, producer gas generator and control system, in its control system:
Embedded Control station 4 is connected with magnetic oxygen analyser 1, pneumatic diaphragm control valve 2 respectively, and magnetic oxygen analyser 1, pneumatic diaphragm control valve 2 all are connected with the air mixed jar;
Embedded Control station 4 is connected with magnetic oxygen analyser 11, pneumatic diaphragm control valve 21, automat 31 respectively, and magnetic oxygen analyser 11, pneumatic diaphragm control valve 21, automat 31 all are connected with No. 1 producer gas generator;
Embedded Control station 4 is connected with magnetic oxygen analyser 12, pneumatic diaphragm control valve 22, automat 32 respectively, and magnetic oxygen analyser 12, pneumatic diaphragm control valve 22, automat 32 all are connected with No. 2 producer gas generators;
Embedded Control station 4 is connected with magnetic oxygen analyser 13, pneumatic diaphragm control valve 23, automat 33 respectively, and magnetic oxygen analyser 13, pneumatic diaphragm control valve 23, automat 33 all are connected with No. 3 producer gas generators;
Embedded Control station 4 is connected with magnetic oxygen analyser 14, pneumatic diaphragm control valve 24, automat 34 respectively, and magnetic oxygen analyser 14, pneumatic diaphragm control valve 24, automat 34 all are connected with No. 4 producer gas generators;
Embedded Control station 4 and infrared CO/CO
2Analyser 12a connects, infrared CO/CO
2Analyser 12a is connected with No. 1 producer gas generator, No. 2 producer gas generators, No. 3 producer gas generators, No. 4 producer gas generators respectively;
Embedded Control station 4 and infrared CO/CO
2Analyser 12b connects, infrared CO/CO
2Analyser 12b is connected with No. 1 producer gas generator, No. 2 producer gas generators, No. 3 producer gas generators, No. 4 producer gas generators respectively;
Embedded Control station 4 is connected with heat-conducted hydrogen analyzer 12c, and heat-conducted hydrogen analyzer 12c is connected with No. 1 producer gas generator, No. 2 producer gas generators, No. 3 producer gas generators, No. 4 producer gas generators respectively;
Embedded Control station 4 and infrared CO/CO
2Analyser 13a connects, infrared CO/CO
2Analyser 13a is connected with No. 1 producer gas generator, No. 2 producer gas generators, No. 3 producer gas generators, No. 4 producer gas generators respectively;
Embedded Control station 4 and infrared CO/CO
2Analyser 13b connects, infrared CO/CO
2Analyser 13b is connected with No. 1 producer gas generator, No. 2 producer gas generators, No. 3 producer gas generators, No. 4 producer gas generators respectively;
Embedded Control station 4 is connected with embedded Control station 4a, embedded Control station 4b through Ethernet 5.
Wherein: magnetic oxygen analyser (AT-001) is used for the oxygen analysis, infrared CO, CO
2Analyser (AT-102a) is used for the CO change and send infrared CO, CO
2Analyser (AT-102b) is used for CO
2Change is sent, and heat-conducted hydrogen analyzer (AT-102c) is used for H
2Change is sent, infrared CO, CO
2Analyser (AT-103a) is used for the CO change and send infrared CO, CO
2Analyser (AT-103b) is used for CO
2Change is sent; Magnetic oxygen analyser (AT-101) is used to add the analysis of nitrogen house steward oxygen concentration, and magnetic oxygen analyser (AT-201) is used to add the analysis of nitrogen house steward oxygen concentration, and magnetic oxygen analyser (AT-301) is used to add the analysis of nitrogen house steward oxygen concentration; Magnetic oxygen analyser (AT-401) is used to add the analysis of nitrogen house steward oxygen concentration
Stage signal is gathered wiring diagram such as Fig. 2 of embedded workstation, analyser, program control solenoid valve, hydraulic pressure stop valve in the link; Program control solenoid valve is connected with analyser with embedded workstation respectively through relay; The hydraulic pressure stop valve is connected with program control solenoid valve, by program control solenoid control.
The characteristics of this control system are following:
1) keep original electronics--the fluid pressure type automat, with its program control instrument as original five stages of system gas of enforcement.
2) per four gas generators are a production unit, a cover oxygenation intermittent coal gas is set prepares dedicated control device, and the program by means of communication regulation and control electronics-fluid pressure type automatic machine, like duration of setting the blowing stages such as grade etc.
3) blowing, on blow, blow down and in stove, add the oxygenation air on opportunity that the stage that blows off is suitable.
4) adopt the Quality Feedback principle, confirm the time of airborne oxygen concentration of oxygenation and oxygenation according to reference elements such as the composition of blowing-out gas or up-downgoing coal gas and furnace temperature.
5) the employing feedforward adds the algorithm and the governing loop of feedback, guarantees the adjustability and the stability of oxygenation concentration.
6) be connected with the production LAN of enterprises with the OPC mode through Ethernet, realize data communication.
Specifically consisting of of this control system:
1. embedded Control station.
Comprising embedded workstation and I/O station.Embedded workstation (also can adopt industrial computer or business computer, but the performance of the performance of performance, particularly anti-adverse environment and anti-virus far can not satisfy the requirement of native system for the embedded computer of Ao Tai company exploitation.), be characterized in:
A) complete machine movement-less part and adopt the low power dissipation electron device, complete machine is made encapsulation process, is suitable for the such rugged surroundings of gas workshop (many dirt, humidity, corrosive gas environment, vibrations).
B) LINUX operating system and the operation platform of employing through cutting out, travelling speed is fast, the danger of basic virus-free infection.
C) can be connected with the Ethernet of enterprises as a node of LAN through the OPC interface, realize information sharing, not receive the danger of virus attack again basically.
I/O is made up of frame, I/O module, communication module, power machine rack at the station.Wherein I/O adopts the RemoteI/O of Germany or homemade I/O series, can be selected based on user's demand.Communication and power supply are redundancy structure.Entire I/O mechanism is installed in the sealing cabinet of 600*400*1800.
1.1 hardware:
Storage medium: 64M～512M internal memory can be matched as required.
Communication interface: PS2 interface, RS232/485 interface and Ethernet interface.
Touch-screen (optional)
CPU(EP9315)
Power supply: AC220V 10%/DC 24V 10%, 3A.
Consumed power＜10W
Optional casing type of protection (common, moistureproof, dustproof, explosion-proof)
Optional casing form (desktop type, wall extension type, grounding, dish dress type, separation type)
1.2 software
Operating system: special-purpose Embedded Real-Time (SuSE) Linux OS.
Configuration software: special-purpose embedded configuration software.
1.3 function
Can realize network service, support the ICP/IP protocol of standard, can realize communication with the supervisory system with OPC interface (PLC, DCS, SCADA) of any opening.Link to each other with the main supervisory system (DCS/PLC) of enterprises through network at the scene, realize two-way data communication.
Can adopt redundant or nonredundant Ethernet structure as required.
Through taking the sealing and dustproof measure, embedded workstation can be installed in the abominable scene of environment.
If adopt explosion separation structure, can be installed in the place (II district) of requirement of explosion proof.
Adopt (SuSE) Linux OS and monitoring software, reliability is high, real-time, response speed soon (data and frame updating time＜500ms).
" industrial liquid crystal display, resolution are 640 * 480,800 * 600,1024 * 768, and brightness is 200,300 (cd/m2) to adopt industrial standard 15; Usable range is wide, and service condition is wide.Also can adopt the liquid crystal display of other specification as required.
1.4 products characteristics
For no floppy drive does not have the embedded computer of hard disk, volume is little.
Low power consumption CPU, no fan, Overall Power Consumption are low.
Complete machine does not have movable member, good reliability.
Network function is strong, can adopt Redundant Ethernet in case of necessity.
Adopt the main supervisory system communication that possesses the OPC interface of OPC technology and any opening, obtain all processes data, the both-way communication between realization and main supervisory system.
Adopt single task, stable extraordinary (SuSE) Linux OS, characteristics such as have after it is cut out, optimizes that system overhead is little, good stability, real-time be high, and the anti-virus ability is strong.When sudden power occurring, data can not lost, and can directly get into man machine operation interface behind the incoming call, and are simple to operate, are easy to safeguard.
Can load and move complicated software, like Optimization Software.
System gas stage signal of the present invention is gathered link
For realize drying, on blow, blow down and air that the stage that blows off adds certain oxygen concentration to realize oxygenation clearance-type gas preparation technology, must gather the initial sum termination signal in each system gas stage of each stove in (or generation) four stoves.For this reason, can combine condition of different to adopt a kind of in following three kinds of methods:
A. the technology valve changeover program of every stove is generated and is carried out by control station, promptly replaces present electronics--the fluid pressure type automat, so each stage signal is the built-in variable in the application program in the control station.
B. keep original electronics--the fluid pressure type automat.With it as implementing the basic programme controlled means of valve.The relay contact signal in its each stage (or certain several solenoid valve) is introduced this ECS control station.
The c.ECS control station adopts the RS232 communication or OPC communication modes and electronics--the fluid pressure type automat interrelates, and sets up both-way communication.
Claims (2)
1. the control device of an oxygenation intermittent coal gas preparation comprises air compression tank, producer gas generator and control system, it is characterized in that:
In the control system:
Comprise No. 1 embedded computer and No. 1 I/O workstation in No. 1 embedded Control station (4);
No. 1 embedded computer is connected with No. 5 magnetic oxygen analysers (1), No. 5 pneumatic diaphragm control valves (2) respectively through No. 1 I/O workstation in No. 1 embedded Control station (4), and No. 5 magnetic oxygen analysers (1), No. 5 pneumatic diaphragm control valves (2) all are connected with the air mixed jar;
No. 1 embedded computer is connected with No. 1 magnetic oxygen analyser (11), No. 1 pneumatic diaphragm control valve (21), No. 1 automat (31) respectively through No. 1 I/O workstation in No. 1 embedded Control station (4), and No. 1 magnetic oxygen analyser (11), No. 1 pneumatic diaphragm control valve (21), No. 1 automat (31) all are connected with No. 1 producer gas generator;
No. 1 embedded computer is connected with No. 2 magnetic oxygen analysers (12), No. 2 pneumatic diaphragm control valves (22), No. 2 automats (32) respectively through No. 1 I/O workstation in No. 1 embedded Control station (4), and No. 2 magnetic oxygen analysers (12), No. 2 pneumatic diaphragm control valves (22), No. 2 automats (32) all are connected with No. 2 producer gas generators;
No. 1 embedded computer is connected with No. 3 magnetic oxygen analysers (13), No. 3 pneumatic diaphragm control valves (23), No. 3 automats (33) respectively through No. 1 I/O workstation in No. 1 embedded Control station (4), and No. 3 magnetic oxygen analysers (13), No. 3 pneumatic diaphragm control valves (23), No. 3 automats (33) all are connected with No. 3 producer gas generators;
No. 1 embedded computer is connected with No. 4 magnetic oxygen analysers (14), No. 4 pneumatic diaphragm control valves (24), No. 4 automats (34) respectively through No. 1 I/O workstation in No. 1 embedded Control station (4), and No. 4 magnetic oxygen analysers (14), No. 4 pneumatic diaphragm control valves (24), No. 4 automats (34) all are connected with No. 4 producer gas generators;
No. 1 embedded computer is connected with No. 1 infrared CO analyser (12a) through No. 1 I/O workstation in No. 1 embedded Control station (4), and No. 1 infrared CO analyser (12a) is connected with No. 1 producer gas generator, No. 2 producer gas generators, No. 3 producer gas generators, No. 4 producer gas generators respectively;
No. 1 embedded computer is through No. 1 I/O workstation and No. 1 infrared CO in No. 1 embedded Control station (4)
2Analyser (12b) connects, No. 1 infrared CO
2Analyser (12b) is connected with No. 1 producer gas generator, No. 2 producer gas generators, No. 3 producer gas generators, No. 4 producer gas generators respectively;
No. 1 embedded computer is connected with No. 1 heat-conducted hydrogen analyzer (12c) through No. 1 I/O workstation in No. 1 embedded Control station (4), and No. 1 heat-conducted hydrogen analyzer (12c) is connected with No. 1 producer gas generator, No. 2 producer gas generators, No. 3 producer gas generators, No. 4 producer gas generators respectively;
No. 1 embedded computer is connected with No. 2 infrared CO analysers (13a) through No. 1 I/O workstation in No. 1 embedded Control station (4), and No. 2 infrared CO analysers (13a) are connected with No. 1 producer gas generator, No. 2 producer gas generators, No. 3 producer gas generators, No. 4 producer gas generators respectively;
No. 1 embedded computer is through No. 1 I/O workstation and No. 2 infrared CO in No. 1 embedded Control station (4)
2Analyser (13b) connects, No. 2 infrared CO
2Analyser (13b) is connected with No. 1 producer gas generator, No. 2 producer gas generators, No. 3 producer gas generators, No. 4 producer gas generators respectively;
No. 1 embedded Control station (4) is connected with No. 2 embedded Control stations (4a), No. 3 embedded Control stations (4b) through Ethernet (5);
Program control solenoid valve (8) is connected with analyser (7) with embedded workstation (6) respectively through relay in the stage signal collection link, and hydraulic pressure stop valve (9) is connected (8) with program control solenoid valve.
2. the control device of a kind of oxygenation intermittent coal gas preparation as claimed in claim 1 is characterized in that:
The CPU of embedded computer is EP9315 in No. 1 embedded Control station (4), No. 2 embedded Control stations (4a), No. 3 embedded Control stations (4b); Storage medium is 64M to a 512M internal memory; Communication interface is PS2 interface, RS232/485 interface and Ethernet interface; Display screen is a touch-screen, and the I/O workstation is Remote I/O.
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| CN2009100610209A CN101503635B (en) | 2009-03-06 | 2009-03-06 | Control device for oxygenation intermittent coal gas preparation |
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| CN2009100610209A CN101503635B (en) | 2009-03-06 | 2009-03-06 | Control device for oxygenation intermittent coal gas preparation |
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| CN101503635B true CN101503635B (en) | 2012-11-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1261353A (en) * | 1960-04-06 | 1961-05-19 | Stein & Roubaix | Improvements to automatic control devices, for the implementation of cyclic processes |
| CN101215478A (en) * | 2008-01-04 | 2008-07-09 | 郭海峰 | Oxygen-increasing intermittent gasification method and technique for fixed bed coal gas producer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1261353A (en) * | 1960-04-06 | 1961-05-19 | Stein & Roubaix | Improvements to automatic control devices, for the implementation of cyclic processes |
| CN101215478A (en) * | 2008-01-04 | 2008-07-09 | 郭海峰 | Oxygen-increasing intermittent gasification method and technique for fixed bed coal gas producer |
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