CN203963997U - A kind of gas fired-boiler combustion control system - Google Patents
A kind of gas fired-boiler combustion control system Download PDFInfo
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- CN203963997U CN203963997U CN201420379217.3U CN201420379217U CN203963997U CN 203963997 U CN203963997 U CN 203963997U CN 201420379217 U CN201420379217 U CN 201420379217U CN 203963997 U CN203963997 U CN 203963997U
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- boiler
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Abstract
The utility model relates to fuel gas buring and field of mechanical technique, specifically a kind of gas fired-boiler combustion control system.Comprise boiler-burner, PLC, the motor-driven butterfly valve of combustion gas, the motor-driven butterfly valve of air, air side servo motor, combustion gas side servo motor, smoke evacuation oxygen level sensor, it is characterized in that: described PLC is provided with two signal output parts and two signal input parts, the first signal output of PLC connects the signal input part of combustion gas side servo motor, one end of the motor-driven butterfly valve of described combustion gas connects the first input end of boiler-burner by pipeline, the second input of boiler-burner connects one end of the motor-driven butterfly valve of air by another pipeline, the motor-driven butterfly valve of described air connects air side servo motor.The utility model compared with the existing technology, control separately by combustion gas and air, avoids burner air-fuel ratio under sub-load to produce fluctuation; Meanwhile, in running, air-fuel ratio can be adjusted voluntarily according to oxygen content in exhaust smoke, reaches fuel-saving object.
Description
Technical field
The utility model relates to fuel gas buring and field of mechanical technique, specifically a kind of gas fired-boiler combustion control system.
Background technology
At present, most gas fired-boiler burnings are controlled and are all adopted mechanical cam push and pull system to control air-fuel ratio, in theory, mechanical cam connecting rod combustion control system in declared working condition once property set after air-fuel ratio, its air-fuel ratio under partial load condition all will keep constant and consistent with setting value with long playing air-fuel ratio, yet after burner long-play, often occur that servo motor moment of torsion is not enough, situations such as connecting rod bending and butterfly valve wearing and tearing and cause air-fuel ratio to occur fluctuation, even under partial load condition because combustion gas and the motor-driven butterfly valve of air are provided by different manufacturers, its rating curve can not meet equal percentage flow characteristic completely, also the phenomenon that there will be air-fuel ratio fluctuation.The fluctuation of air-fuel ratio comes down to the waste of the energy, is the phenomenon that should need as far as possible to avoid appearance in actual motion.
Summary of the invention
The utility model, for overcoming the deficiencies in the prior art, designs a kind of gas fired-boiler combustion control system and makes burner air-fuel ratio after long-play keep setting value constant, to reach the object of saving the energy.
For achieving the above object, design a kind of gas fired-boiler combustion control system, comprise boiler-burner, PLC, the motor-driven butterfly valve of combustion gas, the motor-driven butterfly valve of air, air side servo motor, combustion gas side servo motor, smoke evacuation oxygen level sensor, temperature sensor, it is characterized in that: described PLC is provided with two signal output parts and two signal input parts, the first signal input of PLC connects temperature sensor, the secondary signal input of PLC connects oxygen content in exhaust smoke sensor, the first signal output of PLC connects the signal input part of combustion gas side servo motor, described combustion gas side servo motor connects the motor-driven butterfly valve of combustion gas, one end of the motor-driven butterfly valve of described combustion gas connects boiler-burner by pipeline, described boiler-burner is provided with two inputs, the first input end of boiler-burner connects one end of the motor-driven butterfly valve of combustion gas by pipeline, the second input of boiler-burner connects one end of the motor-driven butterfly valve of air by another pipeline, the motor-driven butterfly valve of described air connects air side servo motor, the signal input part of air side servo motor connects another signal output part of PLC.
The other end of the motor-driven butterfly valve of described combustion gas connects fuel gas pipeline.
The other end of the motor-driven butterfly valve of described air connects air pipe line.
The utility model compared with the existing technology, control separately by combustion gas and air, avoids burner air-fuel ratio under sub-load to produce fluctuation; Meanwhile, in running, air-fuel ratio can be adjusted voluntarily according to oxygen content in exhaust smoke, reaches Optimizing Combustion, fuel-saving object.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing gas fired-boiler combustion control system.
Fig. 2 is the schematic diagram of the utility model gas fired-boiler combustion control system.
Referring to Fig. 1～Fig. 2, wherein, the 1st, boiler-burner, the 2nd, temperature sensor, the 3rd, PLC, the 4th, air side servo motor, the 5th, the motor-driven butterfly valve of combustion gas, the 6th, the motor-driven butterfly valve of air, the 7th, combustion gas side servo motor, the 8th, oxygen content in exhaust smoke sensor, the 9th, connecting rod.
The specific embodiment
With reference to the accompanying drawings the utility model is described further below.
Be illustrated in figure 1 existing gas fired-boiler combustion control system, it is mechanical cam push and pull system, by parts such as air side servo motor 4, the motor-driven butterfly valve 6 of air, the motor-driven butterfly valve 5 of combustion gas, connecting rod 9, PLC3, temperature sensors 2, formed, technical characteristics is for only installing an air side servo motor 4, PLC3 regulates the air capacity of passing through of the motor-driven butterfly valve 6 of air by air side servo motor 4, and make the motor-driven butterfly valve 6 of the motor-driven butterfly valve 5 of combustion gas and air keep synchronizeing by the motor-driven butterfly valve 5 of connecting rod 9 link combustion gas, thereby reach the object that boiler-burner 1 power output regulates in real time.
During existing gas fired-boiler combustion control system work, temperature sensor 2 contrasts boiler furnace actual temperature and design temperature, by PLC3, provide boiler-burner 1 Load Regulation signal to air side servo motor 4, air side servo motor 4 drives the motor-driven butterfly valve 6 regulating burner throttle apertures of air, it is combustion-supporting air quantity, the motor-driven butterfly valve 6 of air, by connecting rod 9 and motor-driven butterfly valve 5 interlocks of combustion gas, is realized the adjusted in concert of air and combustion gas simultaneously, reaches the object of controlling air-fuel ratio.
Be illustrated in figure 2 the utility model gas fired-boiler combustion control system, by parts such as air side servo motor 4, combustion gas side servo motor 7, the motor-driven butterfly valve 6 of air, the motor-driven butterfly valve 5 of combustion gas, PLC3, temperature sensor 2, smoke evacuation oxygen level sensors 8, formed.A kind of gas fired-boiler combustion control system, comprise boiler-burner, PLC, the motor-driven butterfly valve of combustion gas, the motor-driven butterfly valve of air, air side servo motor, combustion gas side servo motor, smoke evacuation oxygen level sensor, temperature sensor, it is characterized in that: described PLC3 is provided with two signal output parts and two signal input parts, the first signal input of PLC3 connects temperature sensor 2, the secondary signal input of PLC3 connects oxygen content in exhaust smoke sensor 8, the first signal output of PLC3 connects the signal input part of combustion gas side servo motor 7, described combustion gas side servo motor 7 connects the motor-driven butterfly valve 5 of combustion gas, one end of the motor-driven butterfly valve 5 of described combustion gas connects boiler-burner 1 by pipeline, described boiler-burner 1 is provided with two inputs, the first input end of boiler-burner 1 connects one end of the motor-driven butterfly valve 5 of combustion gas by pipeline, the second input of boiler-burner 1 connects one end of the motor-driven butterfly valve 6 of air by another pipeline, the motor-driven butterfly valve 6 of described air connects air side servo motor 4, the signal input part of air side servo motor 4 connects another signal output part of PLC3.
The other end of the motor-driven butterfly valve 5 of described combustion gas connects fuel gas pipeline.The other end of the motor-driven butterfly valve 6 of described air connects air pipe line.
During the utility model work, first by temperature sensor 2, boiler furnace actual temperature and design temperature are contrasted, and according to the air-fuel ratio setting, by PLC3, provide boiler-burner 1 Load Regulation signal respectively to combustion gas side servo motor 7 and air side servo motor 4, combustion gas side servo motor 7 drives motor-driven butterfly valve 5 adjustment of combustion gas flows of combustion gas, air side servo motor 4 drives the motor-driven butterfly valve 6 of air to regulate air capacity, with this, realize combustion gas and air regulates simultaneously, and guarantee the constant of in boiler-burner 1 Load Regulation process air-fuel ratio.In addition, smoke evacuation oxygen level sensor 8 is passed to PLC3 by smoke evacuation oxygen content real time data, PLC3 contrasts itself and the smoke evacuation oxygen content of setting under air-fuel ratio, combustion gas side servo motor 7 is provided to conditioning signal, regulate in real time gas flow by the motor-driven butterfly valve 5 of combustion gas to reach the object of adjusting air-fuel ratio.
Claims (3)
1. a gas fired-boiler combustion control system, comprise boiler-burner, PLC, the motor-driven butterfly valve of combustion gas, the motor-driven butterfly valve of air, air side servo motor, combustion gas side servo motor, smoke evacuation oxygen level sensor, temperature sensor, it is characterized in that: described PLC(3) be provided with two signal output parts and two signal input parts, PLC(3) first signal input connects temperature sensor (2), PLC(3) secondary signal input connects oxygen content in exhaust smoke sensor (8), PLC(3) first signal output connects the signal input part of combustion gas side servo motor (7), described combustion gas side servo motor (7) connects the motor-driven butterfly valve of combustion gas (5), one end of the motor-driven butterfly valve of described combustion gas (5) connects boiler-burner (1) by pipeline, described boiler-burner (1) is provided with two inputs, the first input end of boiler-burner (1) connects one end of the motor-driven butterfly valve of combustion gas (5) by pipeline, the second input of boiler-burner (1) connects one end of the motor-driven butterfly valve of air (6) by another pipeline, the motor-driven butterfly valve of described air (6) connects air side servo motor (4), the signal input part connection PLC(3 of air side servo motor (4)) another signal output part.
2. a kind of gas fired-boiler combustion control system as claimed in claim 1, is characterized in that: the other end of the motor-driven butterfly valve of described combustion gas (5) connects fuel gas pipeline.
3. a kind of gas fired-boiler combustion control system as claimed in claim 1, is characterized in that: the other end of the motor-driven butterfly valve of described air (6) connects air pipe line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420379217.3U CN203963997U (en) | 2014-07-10 | 2014-07-10 | A kind of gas fired-boiler combustion control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420379217.3U CN203963997U (en) | 2014-07-10 | 2014-07-10 | A kind of gas fired-boiler combustion control system |
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| Publication Number | Publication Date |
|---|---|
| CN203963997U true CN203963997U (en) | 2014-11-26 |
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|---|---|---|---|
| CN201420379217.3U Expired - Fee Related CN203963997U (en) | 2014-07-10 | 2014-07-10 | A kind of gas fired-boiler combustion control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650672A (en) * | 2015-12-30 | 2016-06-08 | 重庆南方热力工程技术公司 | Electronic air-fuel ratio regulation system |
-
2014
- 2014-07-10 CN CN201420379217.3U patent/CN203963997U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650672A (en) * | 2015-12-30 | 2016-06-08 | 重庆南方热力工程技术公司 | Electronic air-fuel ratio regulation system |
| CN105650672B (en) * | 2015-12-30 | 2018-02-16 | 重庆南方热力工程技术公司 | Air-fuel electrical proportional regulating system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141126 |
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| CF01 | Termination of patent right due to non-payment of annual fee |