CN210165420U - Negative pressure timing back-blowing device for pulverized coal furnace hearth - Google Patents
Negative pressure timing back-blowing device for pulverized coal furnace hearth Download PDFInfo
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- CN210165420U CN210165420U CN201921027403.XU CN201921027403U CN210165420U CN 210165420 U CN210165420 U CN 210165420U CN 201921027403 U CN201921027403 U CN 201921027403U CN 210165420 U CN210165420 U CN 210165420U
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- blowing device
- blowing
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Abstract
The utility model discloses a buggy stove furnace negative pressure is blowback device regularly, including the boiler body, with this body coupling's of boiler wind pressure measuring device and DCS system, still include with the confluence valve that wind pressure measuring device connects, with the gas blowing device that the confluence valve is connected and the pressure measurement device that is used for measuring gas blowing device's gas blowing pressure variation, gas blowing device include with the solenoid valve that the confluence valve is connected, with the constant current device that the solenoid valve is connected, with the instrument air tank that constant current device connects, the solenoid valve with DCS headtotail be used for controlling solenoid valve's operating condition, the utility model provides a because of furnace negative pressure measuring system's jam problem, improved buggy stove furnace negative pressure measuring's accuracy, reduced the frequent online intensity of labour who overhauls of personnel that arouses because of furnace negative pressure measuring system's jam.
Description
Technical Field
The utility model relates to a pulverized coal furnace technical field especially relates to a pulverized coal furnace negative pressure is blowback device regularly.
Background
The negative pressure control of the hearth is used as one of three large links for controlling a boiler combustion loop and is an important index for measuring whether the air supply quantity and the air induction quantity are balanced. Maintaining the negative pressure stability of the hearth is vital to the safe production of the boiler, if the pressure of the hearth is greater than the atmospheric pressure, the flue gas in the hearth overflows, and the personal safety of the boiler, relevant equipment and operators is influenced; on the contrary, when the negative pressure of the hearth is seriously lower in operation, outside cold air can enter the hearth of the boiler in a large amount, so that the temperature in the hearth is reduced, the power consumption of the induced draft fan is increased, the heat loss of smoke exhaust is increased, and the thermal efficiency of the boiler is reduced. In the actual operation process, the furnace negative pressure of pulverized coal furnace often can appear the phenomenon that measurement system blockked up to cause furnace negative pressure measuring accuracy to receive serious influence, lead to boiler operation personnel can't carry out correct operation according to the furnace negative pressure of monitoring, need invest a large amount of manpower and materials and carry out routine maintenance, seriously influence boiler system's safety and stability operation.
Therefore, the device for improving the accuracy and stability of the negative pressure measurement of the pulverized coal furnace hearth and realizing the online automatic purging of the pressure guide pipeline by the negative pressure of the pulverized coal furnace hearth is a problem which needs to be solved urgently.
Disclosure of Invention
The utility model aims at providing a simple structure, the efficient coal powder stove furnace negative pressure of work is blowback device regularly.
The purpose of the utility model is realized like this:
the utility model provides a buggy stove furnace negative pressure is blowback device regularly, including the boiler body, with this body coupling's of boiler wind pressure measuring device and DCS system, still include with the confluence valve that wind pressure measuring device connects, with what the confluence valve is connected is used for the gas blowing device that sweeps to wind pressure measuring device pipeline and is used for measuring the pressure measurement device that gas blowing device's the pressure of blowing pressure changes, gas blowing device include with the solenoid valve that the confluence valve is connected, with the constant current device that the solenoid valve is connected, with the instrument air tank that constant current device is connected, the solenoid valve with DCS headtotail be used for the operating condition of control solenoid valve.
The pressure measuring device comprises a secondary valve connected with the flow merging valve and a pressure transmitter connected with the secondary valve.
The flow merging valve is connected with the wind pressure measuring device through a first pipeline.
The electromagnetic valve is connected with the flow merging valve through a second pipeline, and the secondary valve is connected with the flow merging valve through a third pipeline.
The electromagnetic valve is provided with a button for manually controlling the working state of the electromagnetic valve.
The model of the electromagnetic valve is TMF54-15HP, and the model of the confluence valve is 3100 series confluence three-way valves.
The model of the constant current device is DK 800-4F.
The utility model has the advantages that: the utility model discloses simple structure effectively solves because of furnace negative pressure measurement system's jam problem, has improved buggy stove furnace negative pressure measuring accuracy, provides the guarantee for the abundant burning of buggy, has reduced the intensity of labour that the personnel that arouse because of furnace negative pressure measurement system's jam frequently overhauls on line, and the device has important meaning to the control of buggy stove furnace negative pressure.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure: boiler body 1, wind pressure measuring device 2, first pipeline 3, flow converging valve 4, solenoid valve 5, constant current device 6, instrument air tank 7, DCS system 8, secondary valve 9, pressure transmitter 10, second pipeline 11, third pipeline 12.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, a pulverized coal furnace hearth negative pressure timing back-blowing device comprises a boiler body 1, a wind pressure measuring device 2 and a DCS system 8 which are connected with the boiler body 1, and further comprises a flow-merging valve 4 which is connected with the wind pressure measuring device 2, a blowing device which is connected with the flow-merging valve 4 and is used for blowing a pipeline of the wind pressure measuring device 2, and a pressure measuring device which is used for measuring the blowing pressure change of the blowing device, wherein the flow-merging valve 4 is connected with the wind pressure measuring device 2 through a first pipeline 3, the blowing device comprises an electromagnetic valve 5 which is connected with the flow-merging valve 4, a constant flow device 6 which is connected with the electromagnetic valve 5, and an instrument air tank 7 which is connected with the constant flow device 6, air in the instrument air tank 7 provides an air source for the blowing device, the electromagnetic valve 5 can control the on and off of the air source, and the constant flow, purging a pipeline of the wind pressure measuring device 2 through the flow merging valve 4, preventing a hearth negative pressure measuring system from being blocked, improving the accuracy of the hearth negative pressure measurement of the pulverized coal furnace, and providing guarantee for the sufficient combustion of pulverized coal; the electromagnetic valve 5 is connected with the DCS system 8 and used for controlling the working state of the electromagnetic valve 5, the model of the constant flow device 6 is DK 800-4F, the pressure measuring device comprises a secondary valve 9 connected with the flow merging valve 4 and a pressure transmitter 10 connected with the secondary valve 9, the pressure of the blowing gas entering the wind pressure measuring device 2 is conveniently displayed, so that the working state of the electromagnetic valve 5 is controlled by a DCS (distributed control System) 8, thereby controlling the state of the purge gas entering the wind pressure measuring device 2, the electromagnetic valve 5 is connected with the flow-merging valve 4 through a second pipeline 11, said secondary valve 9 is connected to said confluence valve 4 through a third conduit 12, said solenoid valve 5 being of the type TMF54-15HP, the electromagnetic valve 5 is provided with a button for manually controlling the working state of the electromagnetic valve, and the model 3100 series converging three-way valve of the converging valve 4.
The pulverized coal boiler adopts a Hardy-time DCS control system, the Hardy-time DCS control system transmits field instruments installed on a production field to a cabinet chamber of the control system after signal conversion, and the remote control and the image information display of field equipment are realized through a corresponding network communication protocol and a system controller according to a configured program. Realize man-machine information exchange through it, be connected with confluence valve 4 in every furnace negative pressure measuring device 2 on-the-spot, introduce pressure measurement device all the way, introduce gas blowing device all the way, install an solenoid valve 5 additional on instrument air source pipeline, lay a shielded signal cable of area from on-the-spot to the rack room, on the DO fastener of introducing the DCS control system, system configuration: the bit numbers are SV001, 002, 003 and the like, and the roll calling application is as follows: the hearth negative pressure back-blowing electromagnetic valve is added with a timer to carry out system configuration, remote automatic control of the electromagnetic valve 5 is realized through the system configuration, regular back-blowing of a hearth negative pressure measuring pipeline is achieved through the on-off of a power-on and power-off control air source of the electromagnetic valve 5, the power-on and power-off time of the electromagnetic valve 5 can be freely set, meanwhile, a control button of the electromagnetic valve 5 is added at the hearth negative pressure display position of each flow chart, automatic timing back-blowing can be realized, and manual control back-blowing can also be realized.
The specific parameters are introduced to carry out control scheme configuration and logic judgment, so that the regular back flushing, automatic back flushing under specific working conditions and manual back flushing can be realized, and dust accumulation and blockage prevention under all working conditions are met.
The wind pressure measuring device 2 is a wind pressure sampler installed on the boiler body, and can reduce the dust accumulation of the wind pressure measuring pipeline to a large extent and make the medium with the specific gravity larger than that of the air automatically sink.
The utility model has the advantages that: the utility model discloses simple structure effectively solves because of furnace negative pressure measurement system's jam problem, has improved buggy stove furnace negative pressure measuring accuracy, provides the guarantee for the abundant burning of buggy, has reduced the intensity of labour that the personnel that arouse because of furnace negative pressure measurement system's jam frequently overhauls on line, and the device has important meaning to the control of buggy stove furnace negative pressure.
Claims (7)
1. The utility model provides a buggy stove furnace negative pressure is blowback device regularly, including the boiler body, with this body coupling of boiler's wind pressure measuring device and DCS system, its characterized in that: the device comprises a wind pressure measuring device, a converging valve, a blowing device and a pressure measuring device, wherein the converging valve is connected with the wind pressure measuring device, the blowing device is used for blowing a wind pressure measuring device pipeline and is connected with the converging valve, the pressure measuring device is used for measuring blowing pressure change of the blowing device, the blowing device comprises an electromagnetic valve connected with the converging valve, a constant current device connected with the electromagnetic valve and an instrument air tank connected with the constant current device, and the electromagnetic valve is connected with a DCS (distributed control system) system and is used for controlling the working state of the electromagnetic valve.
2. The pulverized coal furnace hearth negative pressure timing back-blowing device as claimed in claim 1, wherein: the pressure measuring device comprises a secondary valve connected with the flow merging valve and a pressure transmitter connected with the secondary valve.
3. The pulverized coal furnace hearth negative pressure timing back-blowing device as claimed in claim 1, wherein: the flow merging valve is connected with the wind pressure measuring device through a first pipeline.
4. The pulverized coal furnace hearth negative pressure timing back-blowing device as claimed in claim 2, wherein: the electromagnetic valve is connected with the flow merging valve through a second pipeline, and the secondary valve is connected with the flow merging valve through a third pipeline.
5. The pulverized coal furnace hearth negative pressure timing back-blowing device as claimed in claim 1, wherein: the electromagnetic valve is provided with a button for manually controlling the working state of the electromagnetic valve.
6. The pulverized coal furnace hearth negative pressure timing back-blowing device as claimed in claim 1, wherein: the model of the electromagnetic valve is TMF54-15HP, and the model of the confluence valve is 3100 series confluence three-way valves.
7. The pulverized coal furnace hearth negative pressure timing back-blowing device as claimed in claim 1, wherein: the model of the constant current device is DK 800-4F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921027403.XU CN210165420U (en) | 2019-07-03 | 2019-07-03 | Negative pressure timing back-blowing device for pulverized coal furnace hearth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921027403.XU CN210165420U (en) | 2019-07-03 | 2019-07-03 | Negative pressure timing back-blowing device for pulverized coal furnace hearth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210165420U true CN210165420U (en) | 2020-03-20 |
Family
ID=69794038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921027403.XU Expired - Fee Related CN210165420U (en) | 2019-07-03 | 2019-07-03 | Negative pressure timing back-blowing device for pulverized coal furnace hearth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210165420U (en) |
-
2019
- 2019-07-03 CN CN201921027403.XU patent/CN210165420U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200320 Termination date: 20210703 |