CN211176875U - Thermal power plant coal breakage port blockage clearing and fire reversing prevention device based on DCS system control - Google Patents
Thermal power plant coal breakage port blockage clearing and fire reversing prevention device based on DCS system control Download PDFInfo
- Publication number
- CN211176875U CN211176875U CN201921914126.4U CN201921914126U CN211176875U CN 211176875 U CN211176875 U CN 211176875U CN 201921914126 U CN201921914126 U CN 201921914126U CN 211176875 U CN211176875 U CN 211176875U
- Authority
- CN
- China
- Prior art keywords
- coal
- pipe
- dropping
- air
- thermal power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model is suitable for the thermal power generation technical field, provides a clear stifled anti-backfire device of thermal power plant's coal breakage mouth based on DCS system control, including furnace, air cannon subassembly and coal breakage subassembly, the air cannon subassembly includes coal breakage pipe, annular air duct, high-pressure gas air duct, air cannon pipe, solenoid valve, electromagnetic relay, the coal breakage pipe with furnace fixed connection, and the coal breakage pipe is located the lower part of furnace, and one side of solenoid valve is provided with electromagnetic relay, and electromagnetic relay receives start-stop signal, controls opening of solenoid valve to the opening and shutting of automatic control air cannon, through being provided with the coal breakage counter, the coal feeding volume of coal breakage pipe is gauged to the coal breakage counter, and through being provided with temperature detector, temperature detector surveys the temperature in the coal feeder simultaneously, the coal feeding volume of coal breakage pipe and the opening and shutting of coal breakage pipe valve control air cannon open and shut, the anti-backfire of the hearth is realized.
Description
Technical Field
The utility model belongs to the technical field of thermal power, especially, relate to a clear stifled anti-backfire device of thermal power plant's coal breakage mouth based on DCS system control.
Background
The coal feeder of the thermal power plant is of great importance in the safe and stable operation of the boiler, and the temperature in the coal feeder bin is strictly controlled. The outlet of the coal feeding machine coal dropping pipe of the traditional circulating fluidized bed boiler is connected with a hearth, and positive pressure is formed by coal feeding air and sealing air to prevent the hearth from returning fire. When the coal bunker is in normal coal dropping, the positive pressure can be maintained in the coal feeder. When the shed coal is serious, an air channel is formed in the coal bunker, the sealing air pressure cannot be maintained, if the outlet of the coal feeder is not closed in time, high-temperature bed materials in the hearth can flow back into the coal bunker through the coal dropping pipe, the belt of the coal feeder can be burnt in a short time (within 5 minutes), and the temperature of the raw coal bunker can be increased and the fire can be started after a long time (within 10 minutes).
The traditional problem of solving the furnace backfire can only be closed the export of coal breakage mouth as fast as possible usually, but when clearance coal breakage pipe blocks up the problem, coal breakage pipe export can not be closed, and has caused the problem of boiler backfire at the normal shutdown in-process, has the potential safety hazard.
SUMMERY OF THE UTILITY MODEL
The utility model provides a clear stifled anti-backfire device that prevents of coal breakage mouth of thermal power plant based on DCS system control aims at solving the problem that the coal breakage pipe of current thermal power plant blockked up the furnace backfire under the condition that the export of coal breakage pipe was not in time closed in the clearance.
The utility model discloses a clear stifled anti-backfire device that prevents of thermal power plant's coal breakage mouth based on DCS system control, including furnace, air cannon subassembly and coal breakage subassembly, the air cannon subassembly includes coal breakage pipe, annular air duct, high-pressure gas air duct, air cannon pipe, solenoid valve, electromagnetic relay, the coal breakage pipe with furnace fixed connection, and the coal breakage pipe is located the lower part of furnace, the quantity of air cannon pipe is provided with four, four the air cannon pipe with the exit of coal breakage pipe fixed communication, the annular air duct is square, the annular air duct is connected with the air cannon pipe respectively from top to bottom and from left to right, be provided with the solenoid valve on the air cannon pipe, and the solenoid valve is located the one end of air cannon pipe, electromagnetic relay with solenoid valve fixed connection, just electromagnetic relay is located one side of solenoid valve, the high-pressure gas air duct is fixedly communicated with the annular air duct and is positioned on the annular air duct;
the coal dropping component comprises a coal dropping meter, a coal dropping pipe valve, a coal feeder, a raw coal bunker and a temperature detector, the coal dropping meter is arranged on the coal dropping pipe, the coal dropping pipe valve is arranged on the coal dropping pipe and is positioned above the coal dropping meter, the coal feeder is fixedly communicated with the coal dropping pipe, the coal feeder is positioned above the coal dropping pipe, the raw coal bunker is fixedly communicated with the coal feeder and is positioned on the upper surface of the coal feeder, and the temperature detector is arranged on one side of the raw coal bunker.
Preferably, the coal dropping assembly further comprises a coal-feeding air pipeline, the coal-feeding air pipeline is fixedly communicated with the coal dropping pipe, and the coal-feeding air pipeline is located in the middle of the coal dropping pipe.
Preferably, the coal dropping pipe and the horizontal plane form an inclined angle.
Preferably, one ends of the four air cannon tubes are fixedly communicated with the coal dropping tube at different angles respectively.
Preferably, the four air cannon barrels are respectively provided with the electromagnetic valves, and one sides of the four electromagnetic valves are respectively provided with the electromagnetic relays.
Preferably, the probe of the temperature probe extends into the interior of the coal feeder.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a clear stifled anti-backfire device that prevents of coal breakage mouth of thermal power plant based on DCS system control, through being provided with the solenoid valve, one side of solenoid valve is provided with electromagnetic relay, electromagnetic relay receives and stops the signal, opening of control solenoid valve, thereby opening and shutting of automatic control air cannon, through being provided with the coal breakage counter, the coal feeding volume of coal breakage counter measurement coal breakage pipe, simultaneously through being provided with temperature detector, temperature in the coal feeder is surveyed to temperature detector, through the temperature in the coal feeder, the coal feeding volume of coal breakage pipe and opening and shutting of the aperture control air cannon of coal breakage pipe valve open and shut, thereby opening and shutting of accurate control air cannon, realize that furnace prevents backfire.
Drawings
FIG. 1 is a left side view of the structure of the present invention;
FIG. 2 is a schematic front view of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
fig. 4 is a schematic top view of the present invention;
in the figure: 1-hearth, 2-air cannon component, 20-coal dropping pipe, 21-annular gas guide pipe, 22-high pressure gas guide pipe, 23-air cannon pipe, 24-electromagnetic valve, 25-electromagnetic relay, 3-coal dropping component, 32-coal dropping meter, 33-coal dropping pipe valve, 34-coal feeder, 35-raw coal bunker, 36-temperature detector and 37-coal-spreading wind pipeline.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1-4, the utility model provides a clear stifled anti-backfire device technical scheme that prevents of thermal power plant's coal breakage mouth based on DCS system control: comprises a hearth 1, an air cannon component 2 and a coal dropping component 3, wherein the air cannon component 2 comprises a coal dropping pipe 20, an annular air duct 21, a high-pressure gas duct 22, an air cannon pipe 23, an electromagnetic valve 24 and an electromagnetic relay 25, the coal dropping pipe 20 is fixedly connected with the hearth 1, the coal dropping pipe 20 is positioned at the lower part of the hearth 1, four air gun pipes 23 are arranged, the four air gun pipes 23 are fixedly communicated with the outlet of the coal dropping pipe 20, the annular air duct 21 is square, the air gun pipes 23 are respectively connected with the upper part, the lower part, the left part and the right part of the annular air duct 21, the electromagnetic valve 24 is arranged on the air gun pipes 23, and the electromagnetic valve 24 is positioned at one end of the air gun tube 23, the electromagnetic relay 25 is fixedly connected with the electromagnetic valve 24, the electromagnetic relay 25 is positioned at one side of the electromagnetic valve 24, the high-pressure gas air duct 22 is fixedly communicated with the annular air duct 21, and the high-pressure gas air duct 22 is positioned on the annular air duct 21;
the coal dropping assembly 3 comprises a coal dropping meter 32, a coal dropping pipe valve 33, a coal feeder 34, a raw coal bin 35 and a temperature detector 36, the coal dropping meter 32 is arranged on the coal dropping pipe 20, the coal dropping pipe valve 33 is positioned above the coal dropping meter 32, the coal feeder 34 is fixedly communicated with the coal dropping pipe 20, the coal feeder 34 is positioned above the coal dropping pipe 20, the raw coal bin 35 is fixedly communicated with the coal feeder 34, the raw coal bin 35 is positioned on the upper surface of the coal feeder 34, and the temperature detector 36 is arranged on one side of the raw coal bin 35.
In the embodiment, by arranging the coal chute 20, the coal chute 20 is fixedly connected with the furnace 1, the fire coal is conveyed into the furnace 1 through the coal chute 20, by arranging the air cannon tubes 23, the number of the air cannon tubes 23 is four, the four air cannon tubes 23 are respectively and fixedly communicated with the outlet of the coal chute 20 at different angles, the blockage of the coal chute 20 can be conveniently cleaned by the air cannons from different angles, the cleaning efficiency is improved, by arranging the annular air guide tube 21, the annular air guide tube 21 is respectively connected with one air cannon tube 23 at the upper, lower, left and right sides, one end of the air cannon tube 23 is provided with the electromagnetic valve 24, one side of the electromagnetic valve 24 is provided with the electromagnetic relay 25, the start and stop signals are received by the electromagnetic relay 25, so as to control the start of the electromagnetic valve 23, by arranging the high-pressure gas guide tube 22, the high-pressure gas air duct 22 is connected with a high-pressure gas pump, gas generated by the high-pressure gas pump is conveyed to the annular air duct 21 through the high-pressure gas air duct 22, the coal falling meter 32 is arranged at one end of the coal falling pipe 20 and used for measuring the coal feeding amount of the coal falling pipe 20, the coal falling pipe 20 is provided with a coal falling pipe gate valve 33, a coal feeder 34 is arranged at one end of the coal falling pipe 20, the coal feeder 34 conveys a raw coal bin 35 to the coal falling pipe 20, a temperature detector 36 is arranged on the coal feeder 34, a probe of the temperature detector 36 extends into the coal feeder 34 and used for detecting the temperature inside the coal feeder 34, the coal falling meter 32, the coal falling pipe gate valve 33 and the temperature detector 36 are in signal connection with a DCS system, when the temperature detected by the temperature detector 36 is higher than a preset value, the coal falling pipe gate valve 33 is opened and the metering value of the coal falling meter 32 is 0, the DCS system automatically starts an, therefore, the starting and stopping of the air cannon are accurately controlled, when the automatic control system breaks down, an operator can control the air cannon to be opened or closed according to the three signals, and the function of manually preventing backfire is achieved.
Further, the coal dropping component 3 further comprises a coal feeding air pipeline 37, the coal feeding air pipeline 37 is fixedly communicated with the coal dropping pipe 20, and the coal feeding air pipeline 37 is located in the middle of the coal dropping pipe 20.
In this embodiment, the coal feeder 34 conveys the raw coal bunker 35 to the coal drop pipe 20, a coal-feeding air pipeline 37 is arranged on the coal drop pipe 20, one end of the coal-feeding air pipeline 37 is connected with a coal-feeding air box, coal-feeding air generated by the coal-feeding air box is conveyed to the coal drop pipe 20 through the coal-feeding air pipeline 37, the coal-feeding air can prevent high-temperature flue gas in the hearth 1 from flowing backwards, and simultaneously provides thrust for the coal to be blown into the hearth 1, so that the coal enters the hearth 1 at an accelerated speed.
Further, the coal dropping pipe 20 is inclined to the horizontal plane.
In the present embodiment, the coal dropping pipe 20 is inclined to the horizontal, and the coal is accelerated to enter the furnace 1 under the action of gravitational potential energy.
Further, one ends of the four air cannon tubes 23 are respectively fixedly communicated with the coal dropping tube 20 at different angles.
In the embodiment, one ends of the four air cannon tubes 23 are respectively fixedly communicated with the coal dropping tube 20 at different angles, so that the air cannons can conveniently clean the blockage of the coal dropping tube 20 from different angles, and the cleaning efficiency is improved.
Further, electromagnetic valves 24 are respectively arranged on the four air cannon barrels 23, and electromagnetic relays 25 are respectively arranged on one sides of the four electromagnetic valves 24.
In the present embodiment, the four air cannon barrels 23 are respectively provided with the electromagnetic valves 24, one sides of the four electromagnetic valves 24 are respectively provided with the electromagnetic relays 25, and the four electromagnetic relays 25 receive the start-stop signal and can respectively control the corresponding electromagnetic valves 24, so that the four air cannons can be spaced apart.
Further, the probe of the temperature probe 36 extends into the interior of the coal feeder 34.
In the present embodiment, the probe of the temperature detector 36 extends into the coal feeder 34, and the probe of the temperature detector 36 acquires the temperature inside the coal feeder 34, so that the acquired data is more accurate.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The utility model provides a clear stifled anti-backfire device that prevents of coal breakage mouth of thermal power plant based on DCS system control which characterized in that: the coal-dropping device comprises a hearth (1), an air cannon assembly (2) and a coal-dropping assembly (3), wherein the air cannon assembly (2) comprises a coal-dropping pipe (20), an annular air duct (21), high-pressure gas air ducts (22), air cannon tubes (23), four electromagnetic valves (24) and an electromagnetic relay (25), the coal-dropping pipe (20) is fixedly connected with the hearth (1), the coal-dropping pipe (20) is positioned at the lower part of the hearth (1), the number of the air cannon tubes (23) is four, the four air cannon tubes (23) are fixedly communicated with the outlet of the coal-dropping pipe (20), the annular air duct (21) is square, the air cannon tubes (23) are respectively connected with the annular air duct (21) from top to bottom and from left to right, the electromagnetic valves (24) are arranged on the air cannon tubes (23), and the electromagnetic valves (24) are positioned at one end of the air cannon tubes (23), the electromagnetic relay (25) is fixedly connected with the electromagnetic valve (24), the electromagnetic relay (25) is positioned on one side of the electromagnetic valve (24), the high-pressure gas air duct (22) is fixedly communicated with the annular air duct (21), and the high-pressure gas air duct (22) is positioned on the annular air duct (21);
therefore, the coal dropping assembly (3) comprises a coal dropping meter (32), a coal dropping pipe valve (33), a coal feeder (34), a raw coal bin (35) and a temperature detector (36), the coal dropping meter (32) is arranged on the coal dropping pipe (20), the coal dropping pipe valve (33) is located above the coal dropping meter (32), the coal feeder (34) is fixedly communicated with the coal dropping pipe (20), the coal feeder (34) is located above the coal dropping pipe (20), the raw coal bin (35) is fixedly communicated with the coal feeder (34), the raw coal bin (35) is located on the upper surface of the coal feeder (34), and the temperature detector (36) is arranged on one side of the raw coal bin (35).
2. The blockage-clearing and fire-preventing device for the coal drop port of the thermal power plant based on DCS system control of claim 1 is characterized in that: the coal dropping assembly (3) further comprises a coal-feeding air pipeline (37), the coal-feeding air pipeline (37) is fixedly communicated with the coal dropping pipe (20), and the coal-feeding air pipeline (37) is located in the middle of the coal dropping pipe (20).
3. The blockage-clearing and fire-preventing device for the coal drop port of the thermal power plant based on DCS system control of claim 1 is characterized in that: the coal dropping pipe (20) and the horizontal plane form an inclined angle.
4. The blockage-clearing and fire-preventing device for the coal drop port of the thermal power plant based on DCS system control of claim 1 is characterized in that: one ends of the four air gun pipes (23) are respectively fixedly communicated with the coal dropping pipe (20) at different angles.
5. The blockage-clearing and fire-preventing device for the coal drop port of the thermal power plant based on DCS system control of claim 1 is characterized in that: the four air gun tubes (23) are respectively provided with the electromagnetic valves (24), and one sides of the four electromagnetic valves (24) are respectively provided with the electromagnetic relays (25).
6. The blockage-clearing and fire-preventing device for the coal drop port of the thermal power plant based on DCS system control of claim 1 is characterized in that: the probe of the temperature probe (36) extends into the interior of the coal feeder (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921914126.4U CN211176875U (en) | 2019-11-08 | 2019-11-08 | Thermal power plant coal breakage port blockage clearing and fire reversing prevention device based on DCS system control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921914126.4U CN211176875U (en) | 2019-11-08 | 2019-11-08 | Thermal power plant coal breakage port blockage clearing and fire reversing prevention device based on DCS system control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211176875U true CN211176875U (en) | 2020-08-04 |
Family
ID=71801882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921914126.4U Active CN211176875U (en) | 2019-11-08 | 2019-11-08 | Thermal power plant coal breakage port blockage clearing and fire reversing prevention device based on DCS system control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211176875U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377897A (en) * | 2020-12-29 | 2021-02-19 | 金沂蒙集团有限公司 | Adjustable coal feeder pipe connecting device of coal feeding system of circulating fluidized bed boiler |
| CN112728530A (en) * | 2021-02-07 | 2021-04-30 | 西安交通大学 | Anti-blocking system for coal dropping pipe of circulating fluidized bed boiler |
-
2019
- 2019-11-08 CN CN201921914126.4U patent/CN211176875U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377897A (en) * | 2020-12-29 | 2021-02-19 | 金沂蒙集团有限公司 | Adjustable coal feeder pipe connecting device of coal feeding system of circulating fluidized bed boiler |
| CN112377897B (en) * | 2020-12-29 | 2022-07-15 | 金沂蒙集团有限公司 | Adjustable coal feeder pipe connecting device of coal feeding system of circulating fluidized bed boiler |
| CN112728530A (en) * | 2021-02-07 | 2021-04-30 | 西安交通大学 | Anti-blocking system for coal dropping pipe of circulating fluidized bed boiler |
| CN112728530B (en) * | 2021-02-07 | 2022-03-01 | 西安交通大学 | Anti-blocking system for coal dropping pipe of circulating fluidized bed boiler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211176875U (en) | Thermal power plant coal breakage port blockage clearing and fire reversing prevention device based on DCS system control | |
| CN213976087U (en) | Boosting type energy-saving anti-blocking pneumatic conveying device | |
| CN203682609U (en) | Pneumatic dust delivery device of boiler electric dust precipitation system | |
| CN204007783U (en) | A kind of level monitoring device and gasification system | |
| CN115069693B (en) | Anti-blocking purging system of acoustic temperature measuring equipment of coal-fired boiler and use method | |
| CN210394279U (en) | Coal feeding device of circulating fluidized bed gasification furnace | |
| CN207390481U (en) | The grey transport system of purification | |
| CN105387452A (en) | Biomass particle combustion boiler system capable of realizing automatic control | |
| CN203672406U (en) | Wind-pulverized coal on-line monitoring system used for boiler | |
| CN212228130U (en) | Coal-fired power plant boiler secondary air quantity measuring device capable of automatically purging | |
| CN211877532U (en) | Self-pumping type multipoint fly ash constant-speed sampling device | |
| CN107192846A (en) | A kind of anti-blocking resistant wear wind speed and wind system for measuring quantity | |
| CN104849108B (en) | Bleeder flue gas oxygen content on-line monitoring method and device | |
| CN207702451U (en) | A kind of boiler returning charge wind feedway | |
| CN206018661U (en) | A kind of automatic continuous discharger of boiler back end ductwork ash bucket dust stratification | |
| CN105785065A (en) | Power station boiler wind speed on-line monitoring system and speed measuring method | |
| CN106482142A (en) | A kind of coal additive feed arrangement and coal-burning boiler system | |
| CN214388579U (en) | Control system for CO automatic detection | |
| CN110440280B (en) | High-efficiency energy-saving boiler | |
| CN103277808A (en) | Small-scale industrial boiler coal dust storing and supplying system and control method | |
| CN203699084U (en) | External material level detector | |
| CN209415486U (en) | A kind of soot blower system that steam/compressed air automatically switches | |
| CN210198816U (en) | System for measuring oxygen content in flue gas in flue and coal-fired boiler with system | |
| CN202915387U (en) | Biomass boiler feed device | |
| CN206720333U (en) | The binary channels pneumatic ash transmitting system of conveying flying dust is controlled with tank capacitive weight change |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |