CN101303586A - Electric dust removal control system and control method thereof - Google Patents
Electric dust removal control system and control method thereof Download PDFInfo
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Abstract
The invention belongs to the field of an environment protective control, which particularly relates to an electric dedusting control system and a control method thereof; the invention is essentially applicable to the fields such as the power supply system, cement, metallurgy, nonferrous metals and chemical industries, including a central control system, an upper machine set and a lower machine set; the industrial Ethernet based on the TCP/IP protocol is adopted among upper computers in the upper machine set and between the upper computers and lower computers, the lower machine set is connected with the central control system by a switch software Ethernet, the central control system is taken as a monitoring control terminal to design, alter and debug the operation of the system in the upper computer image monitoring control terminal software; the electric dedusting control method includes a fan control, an evaporation low temperature control, an electric field control, a rapping control, a changing-over station control and a gas cold control. The environment protective control of the invention has high degree of automation, low operation cost, small electric energy consumption, convenient maintenance and management and relatively high dedusting efficiency.
Description
Technical field
The invention belongs to the environment protection control field, relate in particular to a kind of electric dust removal control system and control method thereof, be mainly used in electric system, cement, metallurgy, coloured, chemical industry.
Background technology
Along with environmental consciousness is constantly strengthened, environmental requirement improves constantly the steel industry dog-eat-dog, effectively improves quality, output, saves energy and the water resource of product, reduces environmental pollution, and these links are metallurgy industry problem demanding prompt solutions.Flue gas ash removal is used commonplace at steel industry, gravity, cyclone dust removal are arranged usually, bag-type dusting, and electric precipitations etc. are several.Advantages such as wherein electric precipitator has the efficiency of dust collection height, is suitable for high-temperature flue gas, and consumed power is few, and operating cost is low, and maintenance management is convenient.The application example of electric precipitation on converter gas is considerably less, but is finished by external producer, foreign technology fully.It is main because contain coal gas in the converter gas, and gases such as oxygen carry out the as easy as rolling off a log generation blast of dedusting with electric precipitator.
Summary of the invention
The present invention is intended to overcome the deficiencies in the prior art part, and a kind of automaticity height is provided, and operating cost is cheap, and consumed power is few, and maintenance management is convenient, has the electric dust removal control system and the control method thereof of higher efficiency of dust collection.
For achieving the above object, the present invention is achieved in that
Electric dust removal control system, it comprises: central control system, upper unit, the next unit; Adopt Industrial Ethernet network in the described upper unit between the host computer and between host computer and the slave computer based on ICP/IP protocol; Described the next unit links to each other with central monitor system by the switch software Ethernet; Described central control system is as monitoring that control terminal operation to system in host computer graphic monitoring terminal software designs, changes, debugs.
As a kind of preferred version, central control system of the present invention comprises active station and engineer station; Adopt the Industrial Ethernet network of ICP/IP protocol between active station and the engineer station; Active station is installed in the stokehold master-control room, is used for process values collection, monitoring, functions such as report printing; The engineer station is installed near in the sub-control room of fly-ash separator and is used for control terminals such as on-site supervision, modification.
As another kind of preferred version, the Industrial Ethernet network cable of ICP/IP protocol of the present invention adopts optical fiber at a distance.
As the third preferred version, the Industrial Ethernet network cable of ICP/IP protocol of the present invention closely adopts switch.
The control method of above-mentioned electric precipitation comprises blower fan control, the cold temperature control of evaporation, electric field controls, rapping control, switching station control and the cold control of coal gas:
1) blower fan control: when bringing into operation, blower fan is maintained fixed rotating speed, finishes nitrogen replacement, drives the flue gas circulation, and according to different operating modes, different cigarette amounts are stipulated several velocity stages in the steelmaking process, and different phase is used different velocity stages;
2) the cold temperature of evaporation control: as the benchmark reference mark, import cold outlet temperature signal into slave computer with the temperature of evaporating cold outlet, slave computer is according to hydraulic giant atomizing effect family curve, regulate the output by-pass valve control by PID, thus control water route pressure, the water route flow, vapor pressure, steam flow;
3) electric field controls: the electric field secondary current is transferred to an appropriate value, the arcing phenomenon frequently appears as electric field, then to reduce voltage of electric field, as not reaching dust removing effects after the step-down, then improve other voltage of electric field, as still occurring the arcing phenomenon for a long time, then need check dust situation on the pole plate, the rapping situation of vibration body;
4) rapping is controlled: the size according to fume amount is controlled the rapping time, and when the ash arrival high charge level in the grey storehouse, fly-ash separator bottom, prompting operation person unloads ash, and prompting also stops to unload ash automatically when material level is hanged down in ash arrival;
5) switching station control: analyser is with CO, O
2Concentration is converted to standard signal and is sent to slave computer, slave computer with its with diffuse, the recovery standard compares, as meet the standard of diffusing and close recovery valve earlier, open simultaneously and diffuse valve, as meet the recovery standard and close rapidly earlier and diffuse valve, slowly open recovery valve, when manifold pressure and gas-holder pressure near the time open recovery valve rapidly; The speed of threshold switch is controlled to the valve proportional amplifier by slave computer output analog quantity;
6) the cold control of coal gas:, guarantee the cold interior certain liquid level of coal gas according to the start-stop of the automatic control pump of liquid level gauge.
The present invention utilizes PLC industrial control technology and network communications technology, realizing the complex control system of electric precipitator supervisory system, and its automaticity height, consumed power is few, and operating cost is low, be convenient to safeguard.
The present invention system is based on the electric dust removal control system of infotech, advanced industry control, the electric-control system of the shared cover of on-the-spot electric dust-removing equipment, have the automaticity height, advantage such as operating cost is low, easy to maintenance is being represented electric precipitation controller developing direction at present.
Description of drawings
The invention will be further described below in conjunction with the drawings and specific embodiments.Protection scope of the present invention will be not limited only to the statement of following content.
Fig. 1 is control system network topology figure of the present invention;
Fig. 2 is a control method part process chart of the present invention.
Embodiment
Utilize the PLC network technology to realize that distributed sample has become a kind of common recognition in recent years, sampling unit one cover promptly is set near controlled point, finish the state sampling and the control output of controlled point nearby, linking to each other by industrial control network between each sampling unit constitutes the lower computer system of supervisory system.This network can constitute networks such as redundancy according to user's request, can fully satisfy the spot sampling demand technically.Have monitoring function active station and engineer station, adopt patterned monitor terminal to finish the Centralized Monitoring of controlled plant, data analysis, uniform dispatching and management etc.Communication between active station and slave computer can select industrial control network constituting local supervisory system, or selects telephonic communication circuit, wireless-transmission network etc. to constitute long distance control system.And PLC also has suitable advantage in network technology and system control field, with regard to external each major company, Schneider, AB, GE, SIEMENS company etc. have been applied to the PLC networking technology in many large-scale engineering projects, do control, interlocking, the communication of the bottom.
System of the present invention mainly comprises: engineer station, operator station, network portion, slave computer; Described engineer station and operator station arrange and characteristics that in conjunction with the produced on-site Wiring technology industrial computer is selected for use and ground magnificent industrial computer, and native system adopts three industrial computers, constitute Industrial Ethernet.Wherein two as monitoring equipment, and one as the engineer station.Two operator stations are installed in the stokehold master-control room respectively, are used for process values collection, monitoring, functions such as report printing, and the engineer station is installed near the control of fly-ash separator score indoor, is used for control terminals such as on-site supervision, modification.
Described network portion: adopt the Industrial Ethernet network based on ICP/IP protocol between the host computer HMI and between host computer and the PLC main website, network cable adopts optical fiber at a distance, closely adopts netting twine, uses switch technology, and communication speed is 10/100Mb/s.
Described slave computer part: adopt Simatic S7-300PLC to form, wherein one as main website, other four as slave station. S7-300 adopts ethernet communication module CP343-1 communication.Adopt the Profibus-DP net between the native system PLC.The built-in Profibus-DP interface of the CPU315-2DP that Simatic S7-300 is adopted can directly insert the Profibus-DP net, and speed reaches 12Mb/s the soonest.That slave station adopts is ET200M, and configuration IM153 is used to finish the communication of Profibus-DP.
Electric dust removal control system comprises: central control system, upper unit, the next unit; Adopt Industrial Ethernet network in the described upper unit between the host computer and between host computer and the slave computer based on ICP/IP protocol; Described the next unit links to each other with central monitor system by the switch software Ethernet; Described central control system is as monitoring that control terminal operation to system in host computer graphic monitoring terminal software designs, changes, debugs.Described central control system comprises active station and engineer station; Adopt the Industrial Ethernet network of ICP/IP protocol between active station and the engineer station; Active station is installed in the stokehold master-control room, is used for process values collection, monitoring, functions such as report printing; The engineer station is installed near in the sub-control room of fly-ash separator and is used for control terminals such as on-site supervision, modification.The Industrial Ethernet network cable of described ICP/IP protocol adopts optical fiber at a distance.The Industrial Ethernet network cable of described ICP/IP protocol closely adopts switch.
Above-mentioned electric precipitation control method comprises blower fan control, the cold temperature control of evaporation, electric field controls, rapping control, switching station control and the cold control of coal gas:
1) blower fan control: when bringing into operation, blower fan is maintained fixed rotating speed, finishes nitrogen replacement, drives the flue gas circulation, and according to different operating modes, different cigarette amounts are stipulated several velocity stages in the steelmaking process, and different phase is used different velocity stages;
2) the cold temperature of evaporation control: as the benchmark reference mark, import cold outlet temperature signal into slave computer with the temperature of evaporating cold outlet, slave computer is according to hydraulic giant atomizing effect family curve, regulate the output by-pass valve control by PID, thus control water route pressure, the water route flow, vapor pressure, steam flow;
3) electric field controls: the electric field secondary current is transferred to an appropriate value, the arcing phenomenon frequently appears as electric field, then to reduce voltage of electric field, as not reaching dust removing effects after the step-down, then improve other voltage of electric field, as still occurring the arcing phenomenon for a long time, then need check dust situation on the pole plate, the rapping situation of vibration body;
4) rapping is controlled: the size according to fume amount is controlled the rapping time, and when the ash arrival high charge level in the grey storehouse, fly-ash separator bottom, prompting operation person unloads ash, and prompting also stops to unload ash automatically when material level is hanged down in ash arrival;
5) switching station control: analyser is with CO, O
2Concentration is converted to standard signal and is sent to slave computer, slave computer with its with diffuse, the recovery standard compares, as meet the standard of diffusing and close recovery valve earlier, open simultaneously and diffuse valve, as meet the recovery standard and close rapidly earlier and diffuse valve, slowly open recovery valve, when manifold pressure and gas-holder pressure near the time open recovery valve rapidly; The speed of threshold switch is controlled to the valve proportional amplifier by slave computer output analog quantity;
6) the cold control of coal gas:, guarantee the cold interior certain liquid level of coal gas according to the start-stop of the automatic control pump of liquid level gauge.
In the described network portion between operator station and the engineer station HMI and with the PLC main website between employing based on the Industrial Ethernet network of ICP/IP protocol, network cable can adopt optical fiber at a distance, closely adopt ICP/IP protocol, use switch technology, communication speed is 10/100Mb/s.Adopt the Profibus-DP net between the native system PLC, speed reaches 12Mb/s the soonest.That slave station adopts is ET200M, and configuration IM153 is used to finish the communication of Profibus-DP.
Be example with middle steel Tangshan shellfish steel electric dust removal control system technology below:
Native system is divided into active station and two parts of slave computer, wherein:
Slave computer adopts the PLC product of the S7-300 series of Siemens company, and adopts the Step75.3 slave computer programming configuration software of the said firm to carry out the control system exploitation, and this software is supported ladder diagram, FBD (function block diagram), and many programming languages such as statement list carry out system development.Active station and engineer station then are equipped with relevant devices such as industrial controlling main frame, network interface card, as graphical supervision control terminal, do under the software environment at WINDOWS 2000, adopt Siemens WinCC programming software, develop monitoring software voluntarily, be used to realize electric dust removal control system all devices unified monitoring.
The local detection and control terminal of slave computer PLC system becomes local control network by Industry Control TCP/IP network protocol suite, link to each other with central monitor system (operator station and engineer station) by the switch software Ethernet, supervisory system is by the operating system of control computer, connect switch between operator station and the engineer station respectively, two inter-exchanges adopt the optical fiber connected mode, realize fast data exchange, to the operation conditions and the various device of whole electric dust removing system comprehensively monitor, harmony, control.
Supervisory system slave computer PLC controller carries MPI/DP and two communication ports of DP, PG/OP wherein, and HMI system and other automated systems are carried out communication, and MPI is a kind of economical and practical solution.Can connect 125 MPI nodes at most, communication speed 187.5kbit/s.Therefore Simatic S7-300 can be connected on the opening fieldbus PROFIBUS-DP, can set up relatively large distributed frame system.The expanded range that this makes communication, but all communications of field device provided to the third party for controller.Operator's control and function for monitoring and PG function can (MPI DP) all can finish by two kinds of interfaces.Can grow distance programming or the like function by programmable device/PC.
Active station and engineer station can be in host computer graphic monitoring terminal software design, change, debug the management of aspects such as the monitoring of the complete electric dust removal control system of final realization and data to operation of whole electric dust removal control system etc.
1. monitor terminal software design
Use the leading innovation in the market software of recent software technology during the SIMATIC WinCC that selects for use.WinCC is writing a Chinese character in simplified form of Windows Control Center, and in other words, it can provide the required all functions of security control process under Windows NT, Windows 2000/XP and Windows 2003 standard environments.WinCC according to price and performance classification, can efficiently control the process visualization system of automation process.Monitored picture is provided with main-process stream monitored picture, evaporative cooling picture, electric precipitator picture, switching station, PID picture, warning picture, trend picture, parameter setting picture, help screen etc.The blocked operation of picture adopts figure dynamically to connect, and set perfect in shape and function in the picture only needs just can finish screen operation and monitors whole unit, and method of operating is simple and convenient.
2. control mode design
According to technological process, Control essentials comprises blower fan control, evaporates cold temperature control, electric field controls, rapping control, switching station control, the cold control of coal gas etc.
Blower fan keeps a fixed rotating speed when bringing into operation, and finishes nitrogen replacement, drives the flue gas circulation.In the steelmaking process because the operating mode difference, cigarette amount difference.Can stipulate several velocity stages, different phase is used different velocity stages.It is crucial to evaporate cold temperature control ratio, and it directly influences the working condition of fly-ash separator.We, are installed in the cold outlet thermal resistance of evaporation and import temperature signal into PLC as the benchmark reference mark with the temperature of evaporating cold outlet, and PLC is according to hydraulic giant atomizing effect family curve, thereby regulate output by-pass valve control control water route pressure by PID, the water route flow, vapor pressure, steam flow.And then reach control temperature purpose.Owing to used the PID adjusting, valve can be done the self-adaptation adjusting according to design temperature and actual temperature.Realized that automatic control outlet actual temperature is in the design temperature scope.Electric field is the significant points of dedusting, and electric field will be done automatic adjusting according to fume amount, and when fume amount increased, voltage of electric field raise; When fume amount reduced, voltage of electric field reduced.Can also control spark rate, the control discharge time, control electric field does not have the arcing phenomenon, otherwise fragile pole plate.At first the electric field secondary current is transferred to an appropriate value during control, under the situation that can reach better dust removing effects, this value is low more good more.Like this can saves energy, can reduce the explosion danger coefficient again.The arcing phenomenon frequently occurs as electric field, then will reduce voltage of electric field.As not reaching dust removing effects after the step-down, can suitably improve other voltage of electric field.As still occurring the arcing phenomenon for a long time, then need check dust situation on the pole plate, the rapping situation of vibration body.As blast, unload quick-fried valve can open unload quick-fried.Unload and unload quick-fried valve after quick-fried and can automatically reset.Occur unloading for a short time for 3-4 time quick-fried more normal weekly, equipment is gained everything and lose nothing.As unload quick-fried valve and open and do not reset, produce again after then must checking, otherwise easily blast more greatly.Host computer will monitor and unload quick-fried valve reset case, in time makes warning, prompting.It is that rapping falls to be adsorbed on the flue dust on the pole plate that electric motor of shaker mainly acts on, and needs its automatic discontinuous operation of control, as long-term work, will cause the situation that dust just has been adsorbed and has been shaken, and can not fall into the fly-ash separator bottom smoothly.As not working for a long time, will cause that a large amount of dusts are trapped on the pole plate, polar plate spacing diminishes, and easily arcing takes place and dust removing effects weakens.The size of the concrete time of control according to fume amount draws.Level-sensing device is each 1 about being equipped with in the grey storehouse bottom the fly-ash separator, and when ash arrival high charge level, prompting operation person unloads ash, and prompting also stops to unload ash automatically when material level is hanged down in ash arrival.Switching station is diffused valve by CO, O2 analyser, and recovery valve constitutes.Analyser is converted to standard signal with CO, O2 concentration and is sent to PLC.PLC with its with diffuse, the recovery standard compares, as meets the standard of diffusing and closes recovery valve earlier, open simultaneously and diffuse valve.As meet the recovery standard and close rapidly earlier and diffuse valve, slowly open recovery valve, when manifold pressure and gas-holder pressure near the time open recovery valve rapidly.The speed of threshold switch is controlled to the valve proportional amplifier by PLC output analog quantity.The cold control of coal gas is fairly simple, according to the start-stop of the automatic control pump of liquid level gauge, guarantees the cold interior certain liquid level of coal gas.
PLC at first checks nitrogen pressure, as hypotony, is ready to signal for the converter dust-removing device.Secondly PLC checks electrode temperature, low excessively as temperature, does not then allow electric field to power on.After each equipment operation of fly-ash separator is normal, provides fly-ash separator and be ready to signal.In the steelmaking process as the cold outlet temperature of evaporation to occur too high, or the blower fan stall, or lubricating oil pressure crosses abnormal conditions such as low, and PLC will stop the signal that blows to converter control system.
In supervisory system, the data of our required monitoring comprise following three classes, and discrete magnitude is imported (DI), comprise the location status of switch, operating mechanism state, malfunction etc.; Discrete magnitude output (DO) is as the branch of switch, the control of closing a floodgate; Analog quantity input (AI).With shellfish steel electric dust removal control system is example, and sampled point capacity required in it is roughly as follows:
| Sequence number | Type | PLC detection and control terminal sampling number |
| 1 | AI | 20 |
| 2 | RTD | 21 |
| 3 | AO | 7 |
| 4 | DI | 155 |
| 5 | DO | 56 |
On module constitutes, we selected each module specification and technical indicator are as follows: the host computer in system, it is central monitoring system, we select Industrial Control Computer and WINDOWS 2000 hardware platform and the software platform as the basis for use, to constitute patterned monitor terminal, this terminal is carried out data transmission by network interface card or telecommunication line and slave computer, carry out system development with the WinCC programming software simultaneously, be provided with multiple relevant databases such as dynamic real time data storehouse, historical record data storehouse, monitored object database in internal system.
| Sequence number | Model | Explanation |
| 1 | 6ES7315-2AG10-0AB0 | CPU-2DP |
| 2 | 6ES7307-1EA00-0AA0 | Power module |
| 3 | 6ES7953-8LL11-0AA0 | Storage card (MMC) |
| 4 | 6GK7343-1EX11-OXEO | The CP343-1 communication module |
| 5 | 6ES7153-1AA03-OXBO | The IM153-1 interface module |
| 6 | 6ES7321-1BL00-0AA0 | 32 switching input modules |
| 7 | 6ES7322-1BL00-0AA0 | 32 switching value output modules |
| 8 | 6ES7331-7KF02-0AB0 | The input of 8 tunnel analog quantitys |
| 9 | 6ES7331-7PF00-0AB0 | The input of 8 road thermal resistances |
| 10 | 6ES7332-5HF00-0AB0 | The output of 8 tunnel analog quantitys |
| 10 | 6ES7331-7PF10-0AB0 | The input of No. 8 thermopairs |
| 11 | 6ES7392-1AM00-0AA0 | 40 pin front connectors |
| 12 | 6ES7392-1AJ00-0AA0 | 20 pin front connectors |
| 13 | 6XV1830-0EH10 | The profibus communication cable |
3, systemic-function
(1) information acquisition
This function is mainly finished by slave computer, and each PLC sampling unit comes in the acquisition controlling cabinet each AI, DI to order equipment present located state and all kinds of warning message that is connected by scanning, and its sampled scan cycle is less than 10ms.
(2) coding transmission
Be used for various information that lower computer system collects being encoded and reaching host computer operating system, for further processing through communication network.
(3) device control
To be master system carry out long-range harmony control according to the operation conditions of dedusting controller to its each equipment to this function, is sent to slave computer through network; Operation information term of execution of being responsible for carrying out various operational orders and acquisition by lower computer system returns to master system.Its control mode has single object to control and pattern is controlled two kinds, adopts selection, affirmation, execution three to go on foot and operate, and when operation is under an embargo, system will provide information and remind the operator to note.
(4) status surveillance
At the display uplifting window mouth of master system with the patterned state picture that demonstrates all opertaing devices of air compressor machine.Current state with each opertaing device of real time monitoring air compressor machine.Native system also has been equipped with an operator station except that the engineer station, operator's communication and display system are based on SIMATIC WinCC (Windows Control Center).Utilize WinCC software whole flow process and each several part details can be explained in the mode of figure, when configuration, various device state and meter reading are divided into some width of cloth process flow diagrams according to process area, can freely switch by the mode of directory tree between the process flow diagram according to actual conditions.If a certain equipment on the operational flowchart only needs the enterprising line operate of panel that just can eject with click appliance icon or equipment item number.In operator station, can not only graphically monitor, also have alarm logging and historgraphic data recording function whole flow process.The reading of the state of each equipment, each instrument all is recorded in the project database in the flow process, and long preservation.In case of necessity the mode of mode that operating personnel can form or trend curve check or analytic record under data.Operating personnel can also preestablish some reference values (for example liquid level warning point) according to the actual conditions of equipment operation, system will refer to currency and setting to make comparisons when reading of data like this, on operation interface, can occur eye-catching warning message at once and send chimes of doom in case abnormality occurs, handle possible fault to remind operating personnel.
(5) fault alarm
Ejection is presented in the fault alarm window immediately after system detects failure message, demonstrates corresponding failure message, trouble spot and fault-time in different color grade modes; Simultaneously, deposit this failure message in failure information database automatically.
(6) document generates
This function is used for every information in the system is concluded, analyzed and puts in order, and generates required every form, as operation note, and alarm logging, requiring to be provided with according to the onsite user simultaneously is modes such as daily paper, monthly magazine and annual report.
(7) data statistics and analysis
The analog information that this function is used for measuring in the system records the analog quantity historical data base, simultaneously can be according to user's needs, the data message that is recorded in the database is added up and analyzed,, and can call at any time and search contrast etc. with generation real-time tendency figure and historical trend figure.
4. technical characterictic
Utilize PLC to realize that the principal character of air compressor machine supervisory system is as follows:
Distributed sampling unit is realized the sampling nearby of data.
The automatic collection of information and programming in logic control output, the dynamic real-time monitor of feasible system.
Internetwork data transmission is used to the interlock interlocked control of the equipment of realizing, has simplified the control operation of host computer greatly, makes things convenient for local operation.
PLC detection and control terminal modularization, volume is little, and is in light weight, safe and reliable, and has online self check and program power-down protection.Advantages such as high reliability, modular design, network structure, self-checking function, software programming and automaticity height, the easy upgrading of version.
The Programmable Logic Controller S7-300 series of Siemens Company has high reliability, stability and impayable network concatenation ability, the robotization control under the rugged surroundings such as is adapted in outdoor, the tunnel especially.
The graphic monitoring terminal is used to realize graphical, digitized Centralized Monitoring, and can generate all kinds of forms automatically according to user's request.
Communication ports such as built-in MPI/DP, DP can be used for on-the-spot programming, debugging, expansion and maintenance.
5. the key technical indexes
Remote command delivery time≤2.5 second
Remote information displacement delivery time≤2.5 second
Long-distance Control accuracy 〉=99.9% (not allowing malfunction)
Remote information response accuracy 〉=99.9%
Degree of protection: IP55
Working temperature: 0～60 ℃
Storing temperature :-40～+ 85 ℃ (IEC68-2-14)
Relative humidity: 0%～95% condensation not
Sea level elevation: 0～4500.
Claims (5)
1, a kind of electric dust removal control system is characterized in that, comprising: central control system, upper unit, the next unit; Adopt Industrial Ethernet network in the described upper unit between the host computer and between host computer and the slave computer based on ICP/IP protocol; Described the next unit links to each other with central monitor system by the switch software Ethernet; Described central control system is as monitoring that control terminal operation to system in host computer graphic monitoring terminal software designs, changes, debugs.
2, according to the described electric dust removal control system of claim 1, it is characterized in that: described central control system comprises active station and engineer station; Adopt the Industrial Ethernet network of ICP/IP protocol between active station and the engineer station; Active station is installed in the stokehold master-control room, is used for process values collection, monitoring, functions such as report printing; The engineer station is installed near in the sub-control room of fly-ash separator and is used for control terminals such as on-site supervision, modification.
3, according to the described electric dust removal control system of claim 2, it is characterized in that: the Industrial Ethernet network cable of described ICP/IP protocol adopts optical fiber at a distance.
4, according to the described electric dust removal control system of claim 2, it is characterized in that: the Industrial Ethernet network cable of described ICP/IP protocol closely adopts switch.
5, according to the described electric precipitation control method of claim 1, it is characterized in that, comprise blower fan control, the cold temperature control of evaporation, electric field controls, rapping control, switching station control and the cold control of coal gas:
1) blower fan control: when bringing into operation, blower fan is maintained fixed rotating speed, finishes nitrogen replacement, drives the flue gas circulation, and according to different operating modes, different cigarette amounts are stipulated several velocity stages in the steelmaking process, and different phase is used different velocity stages;
2) the cold temperature of evaporation control: as the benchmark reference mark, import cold outlet temperature signal into slave computer with the temperature of evaporating cold outlet, slave computer is according to hydraulic giant atomizing effect family curve, regulate the output by-pass valve control by PID, thus control water route pressure, the water route flow, vapor pressure, steam flow;
3) electric field controls: the electric field secondary current is transferred to an appropriate value, the arcing phenomenon frequently appears as electric field, then to reduce voltage of electric field, as not reaching dust removing effects after the step-down, then improve other voltage of electric field, as still occurring the arcing phenomenon for a long time, then need check dust situation on the pole plate, the rapping situation of vibration body;
4) rapping is controlled: the size according to fume amount is controlled the rapping time, and when the ash arrival high charge level in the grey storehouse, fly-ash separator bottom, prompting operation person unloads ash, and prompting also stops to unload ash automatically when material level is hanged down in ash arrival;
5) switching station control: analyser is with CO, O
2Concentration is converted to standard signal and is sent to slave computer, slave computer with its with diffuse, the recovery standard compares, as meet the standard of diffusing and close recovery valve earlier, open simultaneously and diffuse valve, as meet the recovery standard and close rapidly earlier and diffuse valve, slowly open recovery valve, when manifold pressure and gas-holder pressure near the time open recovery valve rapidly; The speed of threshold switch is controlled to the valve proportional amplifier by slave computer output analog quantity;
6) the cold control of coal gas:, guarantee the cold interior certain liquid level of coal gas according to the start-stop of the automatic control pump of liquid level gauge.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253653A (en) * | 2010-05-17 | 2011-11-23 | 上海超惠通风环保设备有限公司 | Automatic electrical control system for purification and recovery of submicron (high temperature acidic medium) |
| CN101670316B (en) * | 2008-09-03 | 2014-03-12 | 巴布科克和威尔科克斯能量产生集团公司 | System and method for monitoring rapping process |
| CN103673652A (en) * | 2013-12-26 | 2014-03-26 | 中冶东方工程技术有限公司 | Smoke cooling control method and system in dedusting process of electric furnace |
| CN103713614A (en) * | 2014-01-03 | 2014-04-09 | 福建龙净环保股份有限公司 | Wireless transmission system based on electrostatic fabric filter |
| CN104301189A (en) * | 2014-10-15 | 2015-01-21 | 东华大学 | Real-time data acquisition and communication system and method based on Ethernet |
| CN104615074A (en) * | 2015-02-02 | 2015-05-13 | 响水中联水泥有限公司 | Intelligent control system and method for cement grinding |
| CN106111343A (en) * | 2016-07-01 | 2016-11-16 | 盐城工学院 | Electric dust-removing equipment |
| CN107784782A (en) * | 2016-08-24 | 2018-03-09 | 广东中烟工业有限责任公司 | A kind of alarm method and system of the cigarette dust pelletizing system based on wincc |
| CN111570092A (en) * | 2020-04-15 | 2020-08-25 | 浙江大维高新技术股份有限公司 | High-voltage power supply control method for converter gas purification system |
| CN113061019A (en) * | 2021-04-16 | 2021-07-02 | 山西太钢工程技术有限公司 | Method for preparing shaped brick from chromic acid-containing mud through low-temperature drying modification of rotary kiln |
| CN114185316A (en) * | 2021-12-08 | 2022-03-15 | 山东中烟工业有限责任公司 | Fully-integrated monitoring and alarming system for distributed dust removing equipment |
| CN114622055A (en) * | 2022-03-08 | 2022-06-14 | 石横特钢集团有限公司 | Method for removing dust from primary flue gas of converter |
-
2007
- 2007-05-10 CN CNA2007100112473A patent/CN101303586A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101670316B (en) * | 2008-09-03 | 2014-03-12 | 巴布科克和威尔科克斯能量产生集团公司 | System and method for monitoring rapping process |
| CN102253653A (en) * | 2010-05-17 | 2011-11-23 | 上海超惠通风环保设备有限公司 | Automatic electrical control system for purification and recovery of submicron (high temperature acidic medium) |
| CN102253653B (en) * | 2010-05-17 | 2016-04-27 | 上海超惠通风环保设备有限公司 | Submicron order (high-temperature acidic medium) Recovery Purifying automatic electrical control system |
| CN103673652B (en) * | 2013-12-26 | 2015-12-09 | 中冶东方工程技术有限公司 | Flue gas cooling control method in a kind of electric stove dust process and system |
| CN103673652A (en) * | 2013-12-26 | 2014-03-26 | 中冶东方工程技术有限公司 | Smoke cooling control method and system in dedusting process of electric furnace |
| CN103713614A (en) * | 2014-01-03 | 2014-04-09 | 福建龙净环保股份有限公司 | Wireless transmission system based on electrostatic fabric filter |
| CN104301189A (en) * | 2014-10-15 | 2015-01-21 | 东华大学 | Real-time data acquisition and communication system and method based on Ethernet |
| CN104615074A (en) * | 2015-02-02 | 2015-05-13 | 响水中联水泥有限公司 | Intelligent control system and method for cement grinding |
| CN104615074B (en) * | 2015-02-02 | 2017-03-22 | 响水中联水泥有限公司 | Intelligent control system and method for cement grinding |
| CN106111343A (en) * | 2016-07-01 | 2016-11-16 | 盐城工学院 | Electric dust-removing equipment |
| CN107784782A (en) * | 2016-08-24 | 2018-03-09 | 广东中烟工业有限责任公司 | A kind of alarm method and system of the cigarette dust pelletizing system based on wincc |
| CN111570092A (en) * | 2020-04-15 | 2020-08-25 | 浙江大维高新技术股份有限公司 | High-voltage power supply control method for converter gas purification system |
| CN113061019A (en) * | 2021-04-16 | 2021-07-02 | 山西太钢工程技术有限公司 | Method for preparing shaped brick from chromic acid-containing mud through low-temperature drying modification of rotary kiln |
| CN114185316A (en) * | 2021-12-08 | 2022-03-15 | 山东中烟工业有限责任公司 | Fully-integrated monitoring and alarming system for distributed dust removing equipment |
| CN114622055A (en) * | 2022-03-08 | 2022-06-14 | 石横特钢集团有限公司 | Method for removing dust from primary flue gas of converter |
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