CN202216415U - Moving grate type energy-saving constant temperature automatic control device for furnace - Google Patents

Moving grate type energy-saving constant temperature automatic control device for furnace Download PDF

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Publication number
CN202216415U
CN202216415U CN2011202773129U CN201120277312U CN202216415U CN 202216415 U CN202216415 U CN 202216415U CN 2011202773129 U CN2011202773129 U CN 2011202773129U CN 201120277312 U CN201120277312 U CN 201120277312U CN 202216415 U CN202216415 U CN 202216415U
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CN
China
Prior art keywords
heat carrier
transmitter
moving grate
control system
control device
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Expired - Lifetime
Application number
CN2011202773129U
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Chinese (zh)
Inventor
张明龙
王明元
邹勇
殷晨光
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BAOYUAN ELECTRICAL Co Ltd
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BAOYUAN ELECTRICAL Co Ltd
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Priority to CN2011202773129U priority Critical patent/CN202216415U/en
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Abstract

The utility model relates to a moving grate type energy-saving constant temperature automatic control device for a furnace, which belongs to the furnace filed, adopts heat carrier temperature parameters, hearth temperature parameters, hearth negative pressure parameters, hearth smoke component content parameters, heat carrier flow parameters and heat carrier pressure parameters, determines optimum data of fuel supply amount, combustion air amount and hearth negative pressure in real time through software analysis and expert database reasoning operation, controls operation speed of a furnace moving grate supplying fuels, rotation speed of an air supply motor and rotation speed of an air inducing motor in real time, and further controls the fuel supply amount, the combustion air amount and the hearth negative pressure in real time. The moving grate type energy-saving constant temperature automatic control device and the methods can accurately control the fuel supply amount, the combustion air amount and the hearth negative pressure in real time in a combustion process, accurately controls temperature of output heat carriers, saves fuels and electric energy simultaneously, and achieves the purposes of energy conservation, emission reduction and consumption reduction.

Description

Moving grate formula boiler energy-saving thermostatical automatic control device
Technical field
The utility model relates to field of boilers, specifically a kind of moving grate formula boiler energy-saving thermostatical automatic control device.
Background technology
As everyone knows, Industrial Boiler provides the visual plant of producing required heat energy, and through fuel combustion heat hot carrier, the heat carrier of uniform temperature is transported to the hot equipment of using in pipeline, to satisfy industrial needs.Improve in real time accurately the efficiency of combustion of Industrial Boiler control heat carrier heating-up temperature the time, energy-conservation, consumption reduction, reduction of discharging to commercial production and Industrial Boiler are significant.
Common moving grate Industrial Boiler is with as the coal main fuel; Moving grate slowly is delivered into the burner hearth burning with fuel under the drive of motor; The combustion air of burner hearth is provided by air blast, and the flue gas that the combustion chamber draft that air-introduced machine produces produces burning is discharged burner hearth through flue.The heat energy that the burner hearth fuel combustion produces makes the heat carrier heating, and the heat carrier of uniform temperature is transported to hot equipment to satisfy industrial needs.
For a long time, the especially middle-size and small-size Industrial Boiler of Industrial Boiler, major part is that veteran operating personnel rely on conventional instrument and operating means to control.Industrial boiler system is a multi-variable system, has a lot of controlled quentity controlled variables and controlled variable, and disturbance factor is too many, and control hysteresis property is very strong, obviously has complicated coupled relation between many parameters, causes Industrial Boiler to be in the inefficient running status of high energy consumption for a long time.Since the nearly more than ten years; Programmable controller (PLC) technical development is very fast; Make part Industrial Boiler control level that certain raising arranged, still, for the so very strong multi-variable system of control hysteresis property of Industrial Boiler; Because its internal energy transformation mechanism is too complicated; On control strategy, control method, do not innovate, systematically do not design the control scheme comprehensively, be difficult to solve the problem that heat carrier heating-up temperature error is big, Fuel Consumption is high, the thermal efficiency is low, pollutant discharge amount is big that Industrial Boiler still exists at present.
Summary of the invention
In order to overcome the deficiency of prior art; The utility model purpose is to solve the problem that heat carrier heating-up temperature error is big, Fuel Consumption is high, the thermal efficiency is low, pollutant discharge amount is big that Industrial Boiler still exists at present, and a kind of real-time autocontrol method and system that Industrial Boiler heat carrier heating-up temperature improves the efficiency of combustion of Industrial Boiler simultaneously that accurately control in real time is provided.
The utility model solves the technical scheme that its technical problem adopted: a kind of moving grate formula boiler energy-saving thermostatical automatic control device; Be provided with the heat carrier intake pipeline; It is characterized in that: heat carrier input temp transmitter, heat carrier input pressure transmitter, heat carrier input flow rate transmitter are housed on the heat carrier intake pipeline, and heat carrier input temp transmitter, heat carrier input pressure transmitter, heat carrier input flow rate transmitter are connected with control system arithmetic element; Heat carrier output temperature transmitter, heat carrier output pressure transmitter, heat carrier output flow transmitter are housed on the heat carrier export pipeline, and heat carrier output temperature transmitter, heat carrier output pressure transmitter, heat carrier output flow transmitter are connected with control system arithmetic element; Fire box temperature transmitter, burner hearth differential pressure transmitter are housed on Industrial Boiler, and fire box temperature transmitter, burner hearth differential pressure transmitter are connected with control system arithmetic element; At furnace outlet online flue gas analyzer being housed is connected with control system arithmetic element; Moving grate is dragged by the moving grate motor, and the moving grate motor is connected with control system performance element; Be connected for the wind-powered electricity generation machine with the system of control performance element; Blower motor is connected with control system performance element.
The utility model also can be realized through following measure: the heat carrier export pipeline is the export pipeline of conduction oil.The heat carrier export pipeline is the hot blast export pipeline.The heat carrier export pipeline is steam or the hot water delivery pipe's line that is communicated with the steam bag.
The beneficial effect of the utility model is, can synthetically carry out in real time control automatically to Industrial Boiler comprehensively, can guarantee that Industrial Boiler is in optimum Working all the time, can accurately control the temperature of heat outputting carrier; According to heat outputting carrier dynamic temperature parameter, control the quantity delivered of fuel in real time, reduce waste of fuel to the full extent; According to the dynamic smoke components parameter that online flue gas analyzer detects, control the quantity delivered of combustion air in real time, guarantee the burner hearth full combustion of fuel, improve the efficiency of combustion of fuel effectively; According to the dynamic fire box temperature parameter and the dynamic combustion chamber draft parameter of fire box temperature transmitter, the detection of burner hearth differential pressure transmitter, control air inducing amount and combustion chamber draft in real time, at normal discharging combustion product gases simultaneously, the assurance fire box temperature is stablized, and reduces the burner hearth thermal loss.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is the structural representation of the utility model, also is the sketch map of a kind of embodiment.
Fig. 2 is the structural representation of another embodiment of the utility model.
Among the figure: 1. moving grate motor; 2. give the wind-powered electricity generation machine; 3. blower motor; 4. chimney; 5. fuel hopper; 6. moving grate; 7. online flue gas analyzer; 8. heat carrier intake pipeline; 9. heat carrier input temp transmitter; 10. heat carrier input pressure transmitter; 11. heat carrier input flow rate transmitter; 12. fire box temperature transmitter; 13. burner hearth differential pressure transmitter; 14. Industrial Boiler; 15. heat carrier output temperature transmitter; 16. heat carrier output pressure transmitter; 17. heat carrier output flow transmitter; 18. heat carrier export pipeline; 19. steam bag.
The specific embodiment
Embodiment 1:
Shown in Figure 1; Heat carrier input temp transmitter 9, heat carrier input pressure transmitter 10, heat carrier input flow rate transmitter 11 are housed on the utility model heat carrier intake pipeline 8, and heat carrier input temp transmitter 9, heat carrier input pressure transmitter 10, heat carrier input flow rate transmitter 11 are connected with control system arithmetic element; Heat carrier output temperature transmitter 15, heat carrier output pressure transmitter 16, heat carrier output flow transmitter 17 are housed on heat carrier export pipeline 18, and heat carrier output temperature transmitter 15, heat carrier output pressure transmitter 16, heat carrier output flow transmitter 17 are connected with control system arithmetic element; Fire box temperature transmitter 12, burner hearth differential pressure transmitter 13 are housed on Industrial Boiler 14, and fire box temperature transmitter 12, burner hearth differential pressure transmitter 13 are connected with control system arithmetic element; At furnace outlet online flue gas analyzer 7 being housed is connected with control system arithmetic element; Moving grate 6 is dragged by moving grate motor 1, and moving grate motor 1 is connected with control system performance element; Be connected for wind-powered electricity generation machine 2 with the system of control performance element; Blower motor 3 is connected with control system performance element, and blower motor 3 is chimney 4 air inducing, and fuel hopper 5 is Industrial Boiler 14 supply fuel.
The pressure parameter that the temperature parameter that control system arithmetic element provides according to heat carrier output temperature transmitter 15 perhaps provides according to heat carrier output pressure transmitter 16; Judge whether according with process requirements and send corresponding control instruction of heat outputting bed temperature or pressure; The control system control unit is according to the instruction output control signal of control system arithmetic element; Control system performance element is adjusted the rotating speed of moving grate motor 1 according to control signal, and then controls fuel feed in real time.
The smoke components content parameter that control system arithmetic element detects according to the online flue gas analyzer that is equipped with at furnace outlet 7 is judged the efficiency of combustion of fuel and is sent corresponding control instruction; The control system control unit is according to the instruction output control signal of control system arithmetic element; Control system performance element is adjusted the rotating speed to wind-powered electricity generation machine 2 according to control signal, and then controls the combustion air quantity delivered in real time.
Control system arithmetic element is according to the fire box temperature transmitter 12 that on Industrial Boiler 14, is equipped with, fire box temperature parameter and the negative pressure parameter that burner hearth differential pressure transmitter 13 provides; Judge the burning velocity of fuel and send corresponding control instruction; The control system control unit is according to the instruction output control signal of control system arithmetic element; Control system performance element is adjusted the rotating speed of blower motor 3 according to control signal, and then controls combustion chamber draft in real time.
Online flue gas analyzer 7, heat carrier input temp transmitter 9, heat carrier input pressure transmitter 10, heat carrier input flow rate transmitter 11, fire box temperature transmitter 12, burner hearth differential pressure transmitter 13, heat carrier output temperature transmitter 15, heat carrier output pressure transmitter 16, heat carrier output flow transmitter 17 are all set the bound of above-mentioned various parameters; Set the bound of heat carrier pump operating cycle parameter, heat carrier make-up pump operational factor, heat carrier liquid level parameter simultaneously, transfinite and promptly take sound and light alarm or control measure such as stop in emergency.
The control system of Industrial Boiler 14 is made up of arithmetic element, control module and performance element.The arithmetic element of Industrial Boiler 14 is made up of industrial computer, configuration software, application software, communication module, expert database, analysis software.The control module of Industrial Boiler 14 is made up of nonshared control unit or PLC, touch-screen.The performance element of Industrial Boiler 14 can be frequency converter, YE.The heat carrier export pipeline 18 of Industrial Boiler 14 is export pipelines of conduction oil, and the heat carrier export pipeline 18 of Industrial Boiler 14 also can be the hot blast export pipeline.Industrial Boiler 14 is that organic heat is carried stove or steam boiler, hot-water boiler, hot-blast stove.
Embodiment 2:
As shown in Figure 2; The utility model heat carrier output temperature transmitter 15, heat carrier output pressure transmitter 16, heat carrier output flow transmitter 17 are installed on the heat carrier export pipeline 18 that is connected with steam bag 19, and other structure and embodiment 1 are identical.
The operation principle of the utility model is: the heat carrier of Industrial Boiler constantly circulates at the heating position with between with hot equipment through piping, to satisfy the industrial heat demand of using.The heat that needs with hot equipment is constantly to change; But the heat carrier temperature for importing with hot equipment then requires relatively stable; Dynamic need amount according to Industrial Boiler heat outputting carrier dynamic temperature calculation of parameter fuel; Adjust the speed of service of moving grate in real time through the control fire-grating motor speed, and then adjust the quantity delivered of fuel in real time, reach the purpose of accurately stable control heat carrier temperature.When Industrial Boiler heat outputting bed temperature begins to reduce, just strengthen the quantity delivered of fuel; When the heat carrier temperature begins to raise, just reduce the quantity delivered of fuel; All the time the quantity delivered that guarantees fuel changes with the heat carrier variations in temperature.
Smoke components content parameter according to online flue gas analyzer detection; Mainly be the content of carbon monoxide and oxygen; Judge the efficiency of combustion of fuel, calculate the dynamic need amount of combustion air, give the wind rotating speed of motor through control; Adjustment combustion air quantity delivered guarantees the burner hearth full combustion of fuel in real time.Fuel duty increases, and the combustion air supply also increases; Fuel duty diminishes, and the combustion air supply also diminishes; All the time guarantee that the burner hearth fuel-efficient fully burns.
Fuel combustion can produce great amount of heat and flue gas in burner hearth; Suitable negative pressure can make flue gas get rid of burner hearth and the burner hearth thermal loss little; Too small negative pressure makes the burner hearth thermal loss little but unfavorable to discharging flue gas, and excessive negative pressure helps discharging flue gas but the burner hearth thermal loss is big.According to dynamic fire box temperature parameter and dynamic combustion chamber draft parameter, calculate the reasonable numerical value of negative pressure, through the rotating speed of control blower motor, adjust combustion chamber draft in real time, make combustion chamber draft not only help discharging flue gas but also make the burner hearth thermal loss little.
Industry boiler control system is judged the complex working condition of Industrial Boiler through the various parameters of field instrument collection comprehensively; Through software analysis and expert database reasoning computing; In real time definite fuel feed, burner hearth are given the optimal data of air quantity or combustion-supporting air quantity and combustion chamber draft; Control in real time supply with the boiler moving grate of fuel the speed of service, give wind-powered electricity generation machine rotating speed, blower motor rotating speed; And then control fuel feed, combustion-supporting air quantity, combustion chamber draft in real time, Industrial Boiler is carried out comprehensive comprehensively control automatically in real time.
(1) control system is judged the complex working condition of Industrial Boiler according to the various parameters of gathering comprehensively; Draw the optimum control data through software analysis and expert database reasoning computing; Synthetically Industrial Boiler is carried out in real time control automatically comprehensively; Can guarantee that Industrial Boiler is in optimum Working all the time, can accurately control the temperature of heat outputting carrier.
(2) according to heat outputting carrier dynamic temperature parameter, control the quantity delivered of fuel in real time, accomplish " making the best use of everything ", reduce waste of fuel to the full extent.
(3) according to the dynamic smoke components parameter of online flue gas analyzer detection, control the quantity delivered of combustion air in real time, guarantee the burner hearth full combustion of fuel, improve the efficiency of combustion of fuel effectively.
(4) the dynamic fire box temperature parameter and the dynamic combustion chamber draft parameter that detect according to fire box temperature transmitter, burner hearth differential pressure transmitter; Control air inducing amount and combustion chamber draft in real time; At normal discharging combustion product gases simultaneously, guarantee that fire box temperature is stable, reduces the burner hearth thermal loss.
This system uses on 6,000,000 kilocalories of the sharp rich chemical industry in Shandong Co., Ltd and 3,000,000 kilocalorie organic heat carrier furnaces; Can the temperature error of the heat outputting carrier of setting be controlled at ± 1 ℃ of scope; The organic heat carrier furnace fuel savings reaches 30%; Saves energy is more than 31%, realized accurate control, energy-conservation, reduce discharging and the consumption reduction effect.

Claims (4)

1. moving grate formula boiler energy-saving thermostatical automatic control device; Be provided with the heat carrier intake pipeline; It is characterized in that: heat carrier input temp transmitter, heat carrier input pressure transmitter, heat carrier input flow rate transmitter are housed on the heat carrier intake pipeline, and heat carrier input temp transmitter, heat carrier input pressure transmitter, heat carrier input flow rate transmitter are connected with control system arithmetic element; Heat carrier output temperature transmitter, heat carrier output pressure transmitter, heat carrier output flow transmitter are housed on the heat carrier export pipeline, and heat carrier output temperature transmitter, heat carrier output pressure transmitter, heat carrier output flow transmitter are connected with control system arithmetic element; Fire box temperature transmitter, burner hearth differential pressure transmitter are housed on Industrial Boiler, and fire box temperature transmitter, burner hearth differential pressure transmitter are connected with control system arithmetic element; At furnace outlet online flue gas analyzer being housed is connected with control system arithmetic element; Moving grate is dragged by the moving grate motor, and the moving grate motor is connected with control system performance element; Be connected for the wind-powered electricity generation machine with the system of control performance element; Blower motor is connected with control system performance element.
2. according to the said moving grate formula of claim 1 boiler energy-saving thermostatical automatic control device, it is characterized in that said heat carrier export pipeline is the export pipeline of conduction oil.
3. according to the said moving grate formula of claim 1 boiler energy-saving thermostatical automatic control device, it is characterized in that said heat carrier export pipeline is the hot blast export pipeline.
4. according to the said moving grate formula of claim 1 boiler energy-saving thermostatical automatic control device, it is characterized in that said heat carrier export pipeline is steam or the hot water delivery pipe's line that is communicated with the steam bag.
CN2011202773129U 2011-08-02 2011-08-02 Moving grate type energy-saving constant temperature automatic control device for furnace Expired - Lifetime CN202216415U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011202773129U CN202216415U (en) 2011-08-02 2011-08-02 Moving grate type energy-saving constant temperature automatic control device for furnace

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Application Number Priority Date Filing Date Title
CN2011202773129U CN202216415U (en) 2011-08-02 2011-08-02 Moving grate type energy-saving constant temperature automatic control device for furnace

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102278821A (en) * 2011-08-02 2011-12-14 威海宝源电气有限公司 Moving-grate-type boiler energy-saving constant-temperature automatic control method and device
WO2017147812A1 (en) * 2016-03-02 2017-09-08 马骏 Novel heating device applying pulsating combustion technology

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102278821A (en) * 2011-08-02 2011-12-14 威海宝源电气有限公司 Moving-grate-type boiler energy-saving constant-temperature automatic control method and device
WO2017147812A1 (en) * 2016-03-02 2017-09-08 马骏 Novel heating device applying pulsating combustion technology

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Granted publication date: 20120509