CN203798184U - Automatic control system for extra-high-voltage electric kiln - Google Patents
Automatic control system for extra-high-voltage electric kiln Download PDFInfo
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- CN203798184U CN203798184U CN201320634213.0U CN201320634213U CN203798184U CN 203798184 U CN203798184 U CN 203798184U CN 201320634213 U CN201320634213 U CN 201320634213U CN 203798184 U CN203798184 U CN 203798184U
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Abstract
The utility model relates to the field of industrial control and provides an automatic control system for an extra-high-voltage electric kiln. According to the automatic control system for the extra-high-voltage electric kiln, a PLC control panel serves as a control core, centralized control over multiple circuits can be achieved, all thermal control parameters and the self-adaptive fuzzy PID algorithm are written into a PLC closed-loop control unit in the PLC control panel, all kinds of safety interlocking control of the electric kiln are programmed in a unified mode, and programs are run automatically through the PLC control panel; displaying and modification of relevant execution instructions and parameters and processing of historical data and the like can be achieved through an upper computer. Once the automatic control system is debugged for kilning, when kilning is conducted for manufacturing the same products, a user just needs to call the corresponding program, then full automatic control can be achieved by the system, manual intervention is not needed, and the automatic control system can be suitable for various products. By the adoption of the automatic control system, data of temperatures and valve positions in the whole firing process are recorded completely, historical data can be checked conveniently, and the user can also print the relevant historical records.
Description
Technical field
The utility model relates to industrial control field, refers to especially a kind of extra-high voltage electroceramics kiln automatic control system.
Background technology
Electroceramics shuttle kiln control procedure presents the features such as large time delay, non-linear, time variation conventionally, and large-scale electroceramics shuttle kiln heating space is large, there is close coupling, on-the-spot strong jamming in temperature field, brings great uncertainty to the control of atmosphere temperature, has a strong impact on product quality.Therefore improving solution electroceramics shuttle kiln atmosphere temperature control system has important practical significance to meet electroceramics technological requirement.And existing extra-high voltage electroceramics formula kiln can't carry out full-automatic, multiloop centralized Control, and can not realize the two dynamic control technologies of atmosphere-temperature, guarantee that product burns till under the prerequisite of quality, can not reduce the fuel that burns till of product further.
Utility model content
The utility model proposes a kind of extra-high voltage electroceramics kiln automatic control system, it controls accurately stable, can carry out full-automatic and multiloop centralized Control.
The technical solution of the utility model is achieved in that a kind of extra-high voltage electroceramics kiln automatic control system, being included as kiln provides the burner of burning, described burner is connected with igniter, described burner is also distinguished pipeline and is connected gas header pipe, the first air-source and the second air-source, in the pipeline being connected with burner at gas header pipe, be provided with hand-operated valve, pressure regulator and gas electromagnetic valve, in the pipeline being connected with burner at the first air-source, be provided with combustion-supporting magnetic valve, described gas electromagnetic valve is all connected with PLC control panel with combustion-supporting magnetic valve, between described PLC control panel and gas electromagnetic valve, also loop control connection has gas actuator, between described gas electromagnetic valve and burner, be disposed with first flow sensor and burner magnetic valve, described igniter is connected with described burner magnetic valve, described first flow sensor and igniter are all connected with described PLC control panel, between described PLC control panel and combustion-supporting magnetic valve, also loop control connection has wind actuator, between described combustion-supporting magnetic valve and burner, be provided with second quantity sensor, described second quantity sensor and described PLC control panel connect, described the first air-source connects combustion-supporting magnetic valve by combustion-supporting frequency converter, combustion fan successively, the combustion-supporting frequency converter of described PLC control panel control connection, described burner is also connected with the second air-source, and described the second air-source is connected with described burner by temperature adjustment frequency converter, temperature adjustment blower fan, ball valve and check-valves successively, temperature adjustment frequency converter described in described PLC control panel control connection, described kiln is also connected with smoke exhaust fan, and between described PLC control panel and smoke exhaust fan, control connection has smoke evacuation frequency converter, in described kiln, be provided with little differential pressure sensor and for detection of three temperature sensors of described burner temperature, described little differential pressure sensor, temperature sensor are all connected with PLC control panel, the communication of described PLC control panel is connected with at least one host computer and alarm.
Wherein, described temperature sensor is thermocouple.
Wherein, described host computer is connected with printer.
Wherein, described host computer is industrial computer, personal computer, notebook, PDA, mobile phone and/or panel computer.
Wherein, be provided with pressure sensor and YE on gas header pipe, this pressure sensor is connected with PLC control panel respectively with YE.
Native system adopts the control of adaptive fuzzy temperature, input and output quantizing factor, reverse gelatinization from computing, greatly improve the automatic control level of kiln, and effectively ensured enterprise's strict technology requirement to thermal parameters such as atmosphere, temperature in product is burnt till.Guaranteeing that product burns till under the prerequisite of quality, significantly reduced the consumption of fuel, the technical indicator of energy-saving and emission-reduction is on the leading domestic level.This control system is simple to operate, popular close friend's man-machine picture, easily-learned easily mastered; The degree of modularity is high, easy to maintenance.Sintering qualified rate is high, and energy-conserving and environment-protective, its control are stablized accurately, can carry out full-automatic and multiloop centralized Control.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the system construction drawing of the utility model extra-high voltage electroceramics kiln automatic control system;
Fig. 2 is the two control principle drawings that dynamically intersect of the atmosphere-temperature of the utility model extra-high voltage electroceramics kiln automatic control system;
Fig. 3 is the temperature flow series connection proportion control schematic diagram of the utility model extra-high voltage electroceramics kiln automatic control system.
The specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
A kind of extra-high voltage electroceramics kiln automatic control system, as shown in Figure 1, being included as kiln 1 provides the burner 2 of burning, described burner 2 is connected with igniter 3, described burner 2 is also distinguished pipeline and is connected gas header pipe 4, the first air-source 5 and the second air-source 6, in the pipeline being connected with burner 2 at gas header pipe 4, be provided with hand-operated valve 7, pressure regulator 8 and gas electromagnetic valve 9, in the pipeline being connected with burner 2 at the first air-source 5, be provided with combustion-supporting magnetic valve 10, described gas electromagnetic valve 9 is all connected with PLC control panel 11 with combustion-supporting magnetic valve 10, 9 of described PLC control panel 11 and gas electromagnetic valves are gone back loop control connection gas actuator 12, 2 of described gas electromagnetic valve 9 and burners are disposed with first flow sensor 13 and burner magnetic valve 14, described igniter 3 is connected with described burner magnetic valve 14, described first flow sensor 13 and igniter 3 are all connected with described PLC control panel 11,
10 of described PLC control panel 11 and combustion-supporting magnetic valves are gone back loop control connection wind actuator 15,2 of described combustion-supporting magnetic valve 10 and burners are provided with second quantity sensor 16, described second quantity sensor 16 connects with described PLC control panel 11, described the first air-source 5 connects combustion-supporting magnetic valve 10, the combustion-supporting frequency converter 17 of described PLC control panel 11 control connection by combustion-supporting frequency converter 17, combustion fan 18 successively;
Described the second air-source 6 is connected with described burner 2 by temperature adjustment frequency converter 19, temperature adjustment blower fan 20, ball valve 21 and check-valves 22 successively, temperature adjustment frequency converter 19 described in described PLC control panel 11 control connections; Described kiln 1 is also connected with smoke exhaust fan 23, and between described PLC control panel 11 and smoke exhaust fan 23, control connection has smoke evacuation frequency converter 24;
In described kiln 1, be provided with little differential pressure sensor 25 and for detection of three temperature sensors 26 of described burner 2, described little differential pressure sensor 25, temperature sensor 26 are connected with PLC control panel 11 respectively;
Described PLC control panel 11 communications are connected with at least one host computer 27 and alarm 28.
In the present embodiment, described host computer 27 is also connected with printer 29.In the present embodiment, described three TEMP sensors are located at respectively the interior position near described burner 2 of kiln 1, described three temperature sensors 26 are passed to the temperature signal of the burner detecting 2 respectively described PLC control panel 11, described PLC control panel 11 is done weighted comprehensive judgement according to three signals that transmit, and to make different control, processes.
In the present embodiment, described host computer 27 can be in industrial computer, personal computer, notebook, PDA, mobile phone and panel computer wherein one or more.Described host computer 27 is connected with described PLC control panel 11 communications, and user can be checked easily data, parameter and be sent instruction etc. by described host computer 27.
Native system adopts the two dynamic control technologies of atmosphere-temperature, atmosphere link adopts Kalman prediction algorithm to remove and measures noise and control noise, by compound more rules constraint, controls to maintain control accuracy under different temperatures atmosphere and the balance of temperature and atmosphere.It is control core that native system be take Programmable PLC control panel 11, each thermal technology is controlled to parameter and self-adaptive fuzzy algorithm is write into PLC Closed Loop Control Unit, and the various safety interlockings of electroceramics kiln are controlled to the unified program of enrolling, by PLC control panel 11, automatically moved, native system is owing to being connected with host computer 27 and alarm 28, and user can carry out by host computer 27 the checking etc. of input, parameter display, modification, historical data of instruction.Because the host computer 27 of native system is connected with printer 29, user can print relevant historical record.Because native system is connected with alarm 28, when in native system, a certain parts go wrong, alarm 28 can send warning with reminding user.
Further, be provided with pressure sensor and YE (scheming not shown) on gas header pipe 4, this pressure sensor is connected with PLC control panel 11 respectively with YE.Automatic control to gas header pipe 4: pressure sensor is uploaded pressure, host computer 27 shows and record, the Closed Loop Control Unit of PLC control panel 11 can be according in current process curve, the requirement of combustion gas automatically being held greatly or reduced the aperture of actuator, gaseous-pressure superpressure is under-voltage automatic alarm also cuts off main gas valve by YE, and only in the situation that smoke exhaust fan 23, cooling blower and combustion fan 18 are normally opened system allow to open main gas valve.
In native system, the automatic control of kiln 1 pressure: little differential pressure sensor 25 is installed, and the pressure monitoring shows at host computer 27, the furnace pressure automatic alarm that transfinites.The signal input that the signal of little differential pressure sensor 25 is controlled as smoke evacuation, the Closed Loop Control Unit in PLC control panel 11 can, according in current process curve, the requirement of furnace pressure being regulated to the size of combustion-supporting frequency converter 17 automatically, allow pressure control within requiring.
The automatic control of smoke exhaust fan 23: smoke evacuation frequency converter 24 is controlled, and the Closed Loop Control Unit in PLC control panel 11 can regulate automatically according to the requirement in current process curve the size of smoke evacuation frequency converter 24.If smoke exhaust fan 23 breaks down in safety interlocking, system is automatically cut off main gas valve and is stopped kiln and report to the police.On smoke exhaust fan 23, thermocouple is housed, when temperature surpasses 250 ℃, system can be pointed out by automatic alarm, prevents from damaging blower fan.
The automatic control of combustion fan 18: combustion-supporting frequency converter 17 is controlled, and the Closed Loop Control Unit in PLC control panel 11 can be according in current process curve, the requirement of combustion air being regulated to the size of combustion-supporting frequency converter 17 automatically.If combustion fan 18 breaks down in safety interlocking, system is automatically cut off main gas valve and is stopped kiln and report to the police.
The chain grade of electrical safety of native system is: smoke exhaust fan 23> combustion fan 18> main gas valve > gaseous-pressure > igniter 3> burner magnetic valve.
In the present embodiment, described PLC control panel 11 is selected the Programmable Logic Controller of SIEMENS Siemens S-300PLC model.Described industrial computer is selected the totally-enclosed industrial computer of Taiwan BOX270 fan-free, can under the mal-condition such as high temperature, dust is large, normally work.
Refer to Fig. 2, Fig. 2 is the two control principle drawings that dynamically intersect of the atmosphere-temperature of the utility model extra-high voltage electroceramics kiln automatic control system.Described atmosphere-temperature is two dynamically intersects in control principle, and atmosphere policy control is as follows: flame and the air-fuel ratio requirement of burning till default each temperature section in formula.When oxidizing atmosphere is controlled, the output of atmosphere FC controller is as the set input of wind FC controller; The output of temperature PID controller is as the set input of gas FC controller.When reducing atmosphere is controlled, the output of atmosphere FC controller is as the set input of gas FC controller; The output of temperature PID controller is as the set input of wind FC controller.Closed-loop adjustment by general mood FC controller separately meets traffic requirement.Therefore realizing the two dynamically intersections of atmosphere-temperature controls.The in the situation that of atmosphere-thermal ataxia, it is the alternately control of self energy of main temperature compromise that atmosphere control strategy can consider atmosphere under this temperature section, to guarantee the quality of product.
Temperature control loop: by burning till formula dymamic setting design temperature, three adjacent temperature sensors 26 are as signal feedback, through the variation of temperature and rate of temperature change are carried out to Fuzzy Processing, fuzzy control rule, input and output quantizing factor, the automatic computing of these three parts of reverse gelatinization (membership function), output is the pid control parameter of optimum this moment, output error value after computing after temperature pid parameter, if burnt till while being given as oxidizing flame in formula, atmosphere automatic decision is controlled the output valve of temperature PID is sent in gas FC close loop control circuit, if observed temperature is lower than design temperature, temperature PID computing increases gas flow, through gas FC, closed-loop control is increased to setting gas flow gradually gas actuator 12, therefore burner power also strengthens gradually, temperature raises gradually, to design temperature, draw close, finally reach stable state, otherwise contrary.
Atmosphere control loop: set empty so than the setting value for the atmosphere air-fuel ratio of atmosphere FC of amassing with dynamic fine setting rule by burning till formula dymamic setting.Collection to blast, wind-warm syndrome, air pressure respectively, after the wind that collection is returned to flow-through orifice, throughput compensate, wind flow/throughput=actual mixing ratio.Through atmosphere FC computing, Output rusults is removed and is measured noise and control level of noise through Kalman filtering, obtains optimum prediction output valve.If now burnt till while being given as oxidizing flame in formula, atmosphere automatic decision is controlled the output valve of atmosphere FC computing is sent in wind FC close loop control circuit, if actual mixing ratio is lower than setting air-fuel ratio, atmosphere FC computing increases wind flow, through wind FC, the closed-loop control actuator 15 of keeping watch is increased to gradually and sets general mood flow, meet air-fuel ratio and set requirement, finally reach stable state.Otherwise contrary.
Refer to Fig. 3, Fig. 3 is the temperature flow series connection proportion control schematic diagram of the utility model extra-high voltage electroceramics kiln automatic control system.Series-connected stage is controlled and FEEDFORWARD CONTROL: atmosphere FC controller, temperature PID controller are master controller, forms series-connected stage controller respectively with corresponding secondary flow amount controller, so load variations, lag time are long, non-linear, time variation has good control ability.The introducing FEEDFORWARD CONTROL of keeping watch and calming the anger, when the fluctuation of blast, air pressure causes error, flow controller is made regulation output in the very first time, error concealment in rudiment section.The constraint of compound more rules is controlled: in four process sections of the low temperature-oxidation-reduction in electroceramics roasting process-cooling, the domestic only a few automatic control producer that only has has the constraint rule control technology to each temperature section at present, and the just air mass flow rule+air-fuel ratio fine setting rule having.Through practice and theoretical summary of experience, existing constraint control law, in addition refinement is perfect, includes that wind flow rule, throughput rule, air-fuel ratio fine setting are regular, atmosphere-equalized temperature selects excellent rule.
Native system adopts fully integratedization of Siemens SIMATIC-STEP7.0 Programmable Logic Controller as main control device, and this controller integrates superior control, management integration performance and high reliability, and has good man-machine interface and operability easily.System adopts the two dynamic control technologies of atmosphere-temperature, atmosphere link adopts Kalman prediction algorithm to remove and measures noise and control noise, the simultaneously online temperature adjustment of Adaptive Fuzzy PID based on expertise, controls to maintain control accuracy under different temperatures atmosphere and the balance of temperature and atmosphere by compound more rules constraint.By MATLAB emulation and a large amount of practice experiences, show that this algorithm is for multiple-input and multiple-output, pure hysteresis, strongly coupled system, there is good tracking performance, greatly improved the automatic control level of kiln 1, and effectively ensured that enterprise is in the strict technology requirement to thermal parameters such as atmosphere, temperature to electrotechnical porcelain product.Guaranteeing that product burns till under the prerequisite of quality, significantly reduced the consumption of fuel, the technical indicator of energy-saving and emission-reduction is on the leading domestic level.By native system, the temperature in whole sintering procedure, valve position have partial data record, conveniently check historical data, and user can be printed relevant historical record.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. an extra-high voltage electroceramics kiln automatic control system, being included as kiln provides the burner of burning, described burner is connected with igniter, described burner is also distinguished pipeline and is connected gas header pipe, the first air-source and the second air-source, in the pipeline being connected with burner at gas header pipe, be provided with hand-operated valve, pressure regulator and gas electromagnetic valve, in the pipeline being connected with burner at the first air-source, be provided with combustion-supporting magnetic valve, described gas electromagnetic valve is all connected with PLC control panel with combustion-supporting magnetic valve, between described PLC control panel and gas electromagnetic valve, also loop control connection has gas actuator, between described gas electromagnetic valve and burner, be disposed with first flow sensor and burner magnetic valve, described igniter is connected with described burner magnetic valve, described first flow sensor and igniter are all connected with described PLC control panel,
Between described PLC control panel and combustion-supporting magnetic valve, also loop control connection has wind actuator, between described combustion-supporting magnetic valve and burner, be provided with second quantity sensor, described second quantity sensor and described PLC control panel connect, described the first air-source connects combustion-supporting magnetic valve by combustion-supporting frequency converter, combustion fan successively, the combustion-supporting frequency converter of described PLC control panel control connection;
Described the second air-source is connected with described burner by temperature adjustment frequency converter, temperature adjustment blower fan, ball valve and check-valves successively, temperature adjustment frequency converter described in described PLC control panel control connection;
Described kiln is also connected with smoke exhaust fan, and between described PLC control panel and smoke exhaust fan, control connection has smoke evacuation frequency converter;
In described kiln, be provided with little differential pressure sensor and for detection of three temperature sensors of described burner temperature, described little differential pressure sensor, temperature sensor are all connected with PLC control panel;
The communication of described PLC control panel is connected with at least one host computer and alarm.
2. extra-high voltage electroceramics kiln automatic control system as claimed in claim 1, is characterized in that: described temperature sensor is thermocouple.
3. extra-high voltage electroceramics kiln automatic control system as claimed in claim 1, is characterized in that: described host computer is connected with printer.
4. extra-high voltage electroceramics kiln automatic control system as claimed in claim 1, is characterized in that: described host computer is industrial computer, notebook, PDA, mobile phone or panel computer.
5. extra-high voltage electroceramics kiln automatic control system as claimed in claim 1, is characterized in that: on gas header pipe, be provided with pressure sensor and YE, this pressure sensor is connected with PLC control panel respectively with YE.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320634213.0U CN203798184U (en) | 2013-10-14 | 2013-10-14 | Automatic control system for extra-high-voltage electric kiln |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320634213.0U CN203798184U (en) | 2013-10-14 | 2013-10-14 | Automatic control system for extra-high-voltage electric kiln |
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| CN203798184U true CN203798184U (en) | 2014-08-27 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104296548A (en) * | 2014-09-25 | 2015-01-21 | 苏州新长光热能科技有限公司 | Temperature cascade control system of casting holding furnace and control method of temperature cascade control system |
| CN104833235A (en) * | 2015-04-27 | 2015-08-12 | 沈阳鑫博工业技术股份有限公司 | Safety detection device and method for industrial furnace |
| CN104913658A (en) * | 2015-06-05 | 2015-09-16 | 广东中鹏热能科技有限公司 | Production management system of ceramic tile kiln and control method of production management system |
| CN107091577A (en) * | 2017-05-18 | 2017-08-25 | 佛山市安然热工机电设备有限公司 | A kind of online linear scale control combustion system and its control method |
| CN112179129A (en) * | 2020-09-28 | 2021-01-05 | 江西永兴特钢新能源科技有限公司 | Novel tunnel kiln roasting lepidolite for preparing lithium carbonate |
-
2013
- 2013-10-14 CN CN201320634213.0U patent/CN203798184U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104296548A (en) * | 2014-09-25 | 2015-01-21 | 苏州新长光热能科技有限公司 | Temperature cascade control system of casting holding furnace and control method of temperature cascade control system |
| CN104833235A (en) * | 2015-04-27 | 2015-08-12 | 沈阳鑫博工业技术股份有限公司 | Safety detection device and method for industrial furnace |
| CN104913658A (en) * | 2015-06-05 | 2015-09-16 | 广东中鹏热能科技有限公司 | Production management system of ceramic tile kiln and control method of production management system |
| CN107091577A (en) * | 2017-05-18 | 2017-08-25 | 佛山市安然热工机电设备有限公司 | A kind of online linear scale control combustion system and its control method |
| CN112179129A (en) * | 2020-09-28 | 2021-01-05 | 江西永兴特钢新能源科技有限公司 | Novel tunnel kiln roasting lepidolite for preparing lithium carbonate |
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Granted publication date: 20140827 Termination date: 20171014 |