CN111290447A - Air leakage control system of dry slag extractor of power plant - Google Patents
Air leakage control system of dry slag extractor of power plant Download PDFInfo
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- CN111290447A CN111290447A CN201911312278.1A CN201911312278A CN111290447A CN 111290447 A CN111290447 A CN 111290447A CN 201911312278 A CN201911312278 A CN 201911312278A CN 111290447 A CN111290447 A CN 111290447A
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- Prior art keywords
- dry slag
- slag extractor
- vacuum dust
- temperature sensor
- dust collection
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/22—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element being a thermocouple
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
- F23J1/06—Mechanically-operated devices, e.g. clinker pushers
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gasification And Melting Of Waste (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses an air leakage control system of a power plant dry slag extractor, which comprises a vacuum dust collection device, a vacuum dust collection pipe module, a first temperature sensor, a pressure sensor, a cooling air door, a conveying steel belt, a cleaning chain, a second temperature sensor, a PLC intelligent controller and a touch display screen, wherein the vacuum dust collection device is connected with the vacuum dust collection pipe module; the system realizes accurate distribution of the air quantity leaked into a hearth of the dry slag extractor by utilizing the optimal cooling air quantity theory of the dry slag extractor, the air leakage quantity online adjustment and the fine ash suction technology and adjusting the power of the vacuum dust collection device; can avoid the influence of power plant dry slag extractor unorganized hourglass wind to boiler efficiency to solved and cleaned the chain and failed the problem of ash difficulty at the climbing section, can reform transform on current dry slag extractor as the annex facility, can improve that power plant dry slag extractor is stable, economic operation provides reliable assurance.
Description
Technical Field
The invention belongs to the field of operation control of a power plant dry slag extractor, and particularly relates to an air leakage control system of the power plant dry slag extractor.
Background
The normal operation of the dry slag extractor of the power plant is the premise of ensuring the continuous operation of the boiler of the power plant and improving the boiler efficiency, because the dry slag extractor takes the negative pressure of a boiler furnace as power, air in the suction atmosphere cools the slag, the cooling air volume needs to be adjusted according to the change of the slag volume, the change of the slag volume is subjected to the sudden change of the unit load, the influence of soot blowing of a water-cooled wall is realized, the dry slag extractor has stronger randomness, the accurate and timely adjustment of the air leakage volume of the dry slag extractor is difficult to realize, the air leakage volume is increased, the operation efficiency of the boiler is seriously influenced, the flame temperature of the furnace is reduced, and. Therefore, the research on the air leakage control system of the dry slag extractor is not slow. At present: on the basis of the original dry slag extractor structure, multiple domestic power equipment companies develop the adaptability improvement of reducing unorganized air leakage and fine ash, namely, the tightness of the dry slag extractor body is enhanced, the structure of a conveying steel belt is changed to reduce ash leakage, and the structure of a cleaning chain is changed to improve the conveying capacity of fine ash. The air leakage control of the existing power plant dry slag extractor has the following defects and shortcomings:
(1) in the prior art, the air leakage control of the dry slag extractor is finished through manual adjustment, and the requirement of the change of the slag amount of a boiler cannot be met;
(2) the dry slag extractor body has a plurality of loose air leakage points, and cold air leaked into the dry slag extractor in the prior art completely enters a hearth, so that the air leakage rate exceeds the standard, secondary air quantity entering a boiler preheater is squeezed, the exhaust temperature of a boiler is increased, and the operating efficiency of the boiler is reduced; (3) get into boiler dry slag extractor except the slag, partial fine ash in addition, fine ash leaks down from carrying the steel band gap and falls into dry slag extractor bottom, cleans the chain and easily appears palirrhea when carrying fine ash to pile up in a large number in climbing department.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the air leakage control system of the dry slag extractor, which can be used as an accessory facility to be improved on the existing dry slag extractor, and can improve the stability and the economic operation of the dry slag extractor of a power plant and provide reliable guarantee for overcoming the defects in the prior art.
In order to solve the technical problems, the invention adopts the technical scheme that:
the air leakage control system of the power plant dry slag extractor is characterized by comprising a vacuum dust collection device (1), a dust collection pipe module (2), a first temperature sensor (3), a pressure sensor (4), a cooling air door (5), a conveying steel belt (6), a cleaning chain (7) and a second temperature sensor (8);
wherein the vacuum dust suction pipe module (2) comprises an annular dust suction pipe (2-1) arranged around the dry slag extractor body, a dust suction device interface pipe (2-2), a fine ash suction port (2-3) and an electromagnetic butterfly valve (2-4), the annular dust absorption pipe (2-1) is connected with the vacuum dust absorption device (1) through a dust absorption device interface tube (2-2), the fine ash suction port (2-3) and the electromagnetic butterfly valve (2-4) are arranged on the annular dust absorption pipe, the first temperature sensor (3) and the pressure sensor (4) are connected on the dust suction device mouthpiece (2-2), the cooling air door (5) is installed on the side face of the dry slag extractor body, the cleaning chain (7) is installed on the lower portion of the dry slag extractor body, and the conveying steel belt (6) is installed on the lower portion of a hearth of the dry slag extractor body; the second temperature sensor (8) is mounted above the conveying steel belt (6);
cold air entering the dry slag extractor through a cooling air door is divided into α 1 components and α 2 components, wherein α 1 components flow upwards, enter a slag hopper after being heated through a conveying steel belt (6), α 2 components flow downwards, pass through a cleaning chain (7), are mixed with unorganized air leakage of the dry slag extractor into α 3 components, and enter the vacuum dust collection device (1) through a vacuum dust collection pipe module (2), α 1 components flow through the temperature of the conveying steel belt (6) and are monitored by a second temperature sensor (8), the power of the vacuum dust collection device (1) is adjusted by changing the power of the vacuum dust collection device (1), and the power change of the vacuum dust collection device (1) is reflected by a pressure sensor (4).
Furthermore, the intelligent temperature control device further comprises a PLC intelligent controller (9) and a touch display screen (10), wherein the first temperature sensor (3), the pressure sensor (4) and the second temperature sensor (8) are connected with the PLC intelligent controller (9), and the PLC intelligent controller (9) is connected with the touch display screen (10);
the vacuum dust suction pipe module (2) comprises one or more fine ash suction ports (2-3) and electromagnetic butterfly valves (2-4), and the fine ash suction ports (2-3) and the electromagnetic butterfly valves (2-4) are arranged on the annular dust suction pipe at equal intervals in a one-to-one mode.
Furthermore, the PLC intelligent controller (9) adopts closed-loop control to accurately adjust the measured temperature parameters of the second temperature sensor (8), the PLC intelligent controller (9) adopts a sequential control mode to control the electromagnetic butterfly valves (2-4), and the control process is displayed on the touch display screen (10).
Furthermore, the first temperature sensor (3) is used for protecting the safe operation of the vacuum dust collection device (1) and preventing the smoke in the hearth from entering the vacuum dust collection pipe module (2) when the power of the vacuum dust collection device (1) is overlarge; the PLC intelligent controller (9) displays the collected running information of the dry slag extractor air leakage control system on the touch display screen (10) in real time, and operators can monitor the state on the touch display screen (10) and modify the program and the index fixed value on line.
Compared with the prior art, the invention has the following beneficial technical effects:
1. according to the invention, a set of air leakage control system is added on the original dry slag extractor, and the accurate control of the hearth air leakage can be realized by performing closed-loop control on the temperature of the slag bucket, so that the adverse effect of large air leakage on the boiler efficiency is eliminated.
2. The invention balances the suction effect of the negative pressure of the hearth on the dry-type slag extractor through the vacuum dust collection device, performs organized distribution control on the airflow in the dry-type slag extractor, and reasonably distributes the flow channels of the cooling air.
3. The air entering the cooling air door of the dry slag extractor is divided into two parts, one part flows upwards through the conveying steel belt to cool the slag and then enters the hearth, and the other part flows downwards through the sweeping chain, passes through the fine ash suction port and the electromagnetic butterfly valve and is collected to the annular vacuum dust collection pipe arranged around the body of the dry slag extractor.
4. The negative pressure in the dry slag extractor is controlled by the vacuum dust collection device, unorganized air leakage of the original dry slag extractor enters the annular vacuum dust collection pipe, the air supply volume of the boiler is not squeezed, and the boiler efficiency is improved.
5. According to the invention, the fine ash suction ports are opened intermittently and in groups, and the vacuum dust collection pipe is used for thoroughly removing the fine ash accumulated at the cleaning chain of the dry slag extractor without manual cleaning, so that the adverse effect of additional air leakage on the boiler in the manual cleaning process is eliminated.
6. The fine ash collected by the vacuum dust collector is discharged into the slag bin through the ash discharge pipe, so that the fine ash is completely recycled without generating environmental pollution and loss.
7. The dry slag extractor air leakage control system is controlled by a PLC (programmable logic controller), can realize closed-loop control of the temperature of a slag hopper, controls the suction process of fine ash by a program, and has a temperature protection signal to prevent boiler flue gas caused by overlarge output of a vacuum dust collection device from entering a vacuum dust collection pipe.
8. The invention conforms to the technical specification of the operation of the dry slag extractor of the power plant, has simple system structure, reduces the unorganized air leakage rate of the dry slag extractor by more than 60 percent, reduces the exhaust gas temperature by 5-7 ℃, and improves the boiler efficiency by 0.8-1 percent.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate a certain embodiment of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a flow diagram of the present invention;
FIG. 2 is a block diagram of the working principle of the present invention;
description of the reference numerals
1-vacuum cleaning device; 2-dust absorption pipe module; 3-a first temperature sensor; 4-a pressure sensor; 5-cooling the air door; 6, conveying a steel belt; 7-cleaning chain; 8-a second temperature sensor; 9-PLC intelligent controller; 10-touch display screen; 2-1-annular dust suction pipe; 2-a dust extraction mouthpiece; 2-3-fine ash suction port; 2-4-electromagnetic butterfly valve.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1 and 2, the air leakage control system of the power plant dry slag extractor of the invention comprises a vacuum dust collection device 1, a dust collection pipe module 2, a first temperature sensor 3, a pressure sensor 4, a cooling air door 5, a conveying steel belt 6, a cleaning chain 7, a second temperature sensor 8, a PLC intelligent controller 9 and a touch display screen 10; the vacuum dust suction pipe module 2 comprises an annular dust suction pipe 2-1, a dust suction device interface pipe 2-2, a fine ash suction port 2-3 and an electromagnetic butterfly valve 2-4 which are arranged around the dry slag extractor body, the annular dust suction pipe 2-1 is connected with the vacuum dust suction device 1 through the dust suction device interface pipe 2-2, the fine ash suction port 2-3 and the electromagnetic butterfly valve 2-4 are arranged on the annular dust suction pipe, the dust suction device interface pipe 2-2 is connected with a first temperature sensor 3 and a pressure sensor 4, and the cooling air door 5, a conveying steel belt 6 and a cleaning chain 7 are arranged on the dry slag extractor body.
In the embodiment, the intelligent temperature control device further comprises a PLC intelligent controller 9 and a touch display screen 10, wherein the first temperature sensor 3, the pressure sensor 4 and the second temperature sensor 8 are connected with the PLC intelligent controller 9, and the PLC intelligent controller 9 is connected with the touch display screen 10; the vacuum dust suction pipe module 2 comprises one or more fine ash suction ports 2-3 and electromagnetic butterfly valves 2-4, and the fine ash suction ports 2-3 and the electromagnetic butterfly valves 2-4 are arranged on an annular dust suction pipe at equal intervals in a one-to-one mode; the air dust collector adopts a fixed type, a discharge pipe is connected into a slag bin, the first temperature sensor 3 and the second temperature sensor 8 both adopt an inserted k-index armored thermocouple with protective sleeves, and the pressure sensor adopts a pressure transmitter
In this embodiment, the PLC intelligent controller 9 precisely adjusts the measured temperature parameter of the second temperature sensor 8 by using closed-loop control, and the PLC intelligent controller 9 controls the electromagnetic butterfly valves 2 to 4 by using a sequential control method, and displays the control process on the touch display screen 10.
In the embodiment, cold air entering a dry slag extractor through a cooling air door is divided into α 1 components and α 2 components, wherein α 1 components flow upwards, pass through a conveying steel belt 6, are heated and then enter a slag hopper, α 2 components flow downwards, pass through a cleaning chain 7, are mixed with unorganized air leakage of the dry slag extractor to form α 3 components, and enter a vacuum dust collector 1 through a vacuum dust collection pipe module 2, α 1 components pass through the temperature of the conveying steel belt 8 and are monitored by a second temperature sensor 8, the power of the vacuum dust collector 1 is adjusted by changing the power of the vacuum dust collector 1, the power change of the vacuum dust collector 1 is reflected by a pressure sensor 4, a PLC intelligent controller 9 compares the temperature collected by the second temperature sensor 8 with a preset ideal temperature of a touch display screen 10, controls the pressure collected by the pressure sensor 4 according to the comparison deviation, realizes smooth control of the temperature of the slag hopper by changing the distribution example of α 1 and α 2, and controls the temperature of the touch display screen 10 to exceed the preset temperature, and controls the temperature of the vacuum dust collector to alarm when the power of the vacuum dust collector exceeds the preset limit 1.
In this embodiment, the first temperature sensor 3 is used to protect the vacuum cleaner 1 from running safely, and prevent the flue gas in the furnace chamber from entering the vacuum cleaning pipe module 2 when the power of the vacuum cleaner 1 is too high; the PLC intelligent controller 9 displays the collected running information of the dry slag extractor air leakage control system on the touch display screen 10 in real time, and the operator can monitor the state on the touch display screen 10 and modify the program and the index fixed value on line.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (4)
1. The air leakage control system of the power plant dry slag extractor is characterized by comprising a vacuum dust collection device (1), a dust collection pipe module (2), a first temperature sensor (3), a pressure sensor (4), a cooling air door (5), a conveying steel belt (6), a cleaning chain (7) and a second temperature sensor (8);
wherein the vacuum dust suction pipe module (2) comprises an annular dust suction pipe (2-1) arranged around the dry slag extractor body, a dust suction device interface pipe (2-2), a fine ash suction port (2-3) and an electromagnetic butterfly valve (2-4), the annular dust absorption pipe (2-1) is connected with the vacuum dust absorption device (1) through a dust absorption device interface tube (2-2), the fine ash suction port (2-3) and the electromagnetic butterfly valve (2-4) are arranged on the annular dust absorption pipe, the first temperature sensor (3) and the pressure sensor (4) are connected on the dust suction device mouthpiece (2-2), the cooling air door (5) is installed on the side face of the dry slag extractor body, the cleaning chain (7) is installed on the lower portion of the dry slag extractor body, and the conveying steel belt (6) is installed on the lower portion of a hearth of the dry slag extractor body; the second temperature sensor (8) is mounted above the conveying steel belt (6);
cold air entering the dry slag extractor through a cooling air door is divided into α 1 components and α 2 components, wherein α 1 components flow upwards, enter a slag hopper after being heated through a conveying steel belt (6), α 2 components flow downwards, pass through a cleaning chain (7), are mixed with unorganized air leakage of the dry slag extractor into α 3 components, and enter the vacuum dust collection device (1) through a vacuum dust collection pipe module (2), α 1 components flow through the temperature of the conveying steel belt (6) and are monitored by a second temperature sensor (8), the power of the vacuum dust collection device (1) is adjusted by changing the power of the vacuum dust collection device (1), and the power change of the vacuum dust collection device (1) is reflected by a pressure sensor (4).
2. The air leakage control system of the power plant dry slag extractor according to claim 1, further comprising a PLC intelligent controller (9) and a touch display screen (10), wherein the first temperature sensor (3), the pressure sensor (4) and the second temperature sensor (8) are connected with the PLC intelligent controller (9), and the PLC intelligent controller (9) is connected with the touch display screen (10);
the vacuum dust suction pipe module (2) comprises one or more fine ash suction ports (2-3) and electromagnetic butterfly valves (2-4), and the fine ash suction ports (2-3) and the electromagnetic butterfly valves (2-4) are arranged on the annular dust suction pipe at equal intervals in a one-to-one mode.
3. The air leakage control system of the power plant dry slag extractor according to claim 2, characterized in that the PLC intelligent controller (9) adopts closed-loop control to accurately adjust the measured temperature parameter of the second temperature sensor (8), and the PLC intelligent controller (9) adopts a sequential control mode to control the electromagnetic butterfly valves (2-4) and display the control process on the touch display screen (10).
4. The air leakage control system of the power plant dry slag extractor according to claim 3, wherein the first temperature sensor (3) is used for protecting the safe operation of the vacuum dust collector (1) and preventing the flue gas in the hearth from entering the vacuum dust collecting pipe module (2) when the power of the vacuum dust collector (1) is too high; the PLC intelligent controller (9) displays the collected running information of the dry slag extractor air leakage control system on the touch display screen (10) in real time, and operators can monitor the state on the touch display screen (10) and modify the program and the index fixed value on line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911312278.1A CN111290447A (en) | 2019-12-18 | 2019-12-18 | Air leakage control system of dry slag extractor of power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911312278.1A CN111290447A (en) | 2019-12-18 | 2019-12-18 | Air leakage control system of dry slag extractor of power plant |
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| CN111290447A true CN111290447A (en) | 2020-06-16 |
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| CN201911312278.1A Pending CN111290447A (en) | 2019-12-18 | 2019-12-18 | Air leakage control system of dry slag extractor of power plant |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101660760A (en) * | 2009-05-20 | 2010-03-03 | 北京国电富通科技发展有限责任公司 | Dry-type slag-conveying device |
| CN202419677U (en) * | 2011-10-24 | 2012-09-05 | 河北省电力勘测设计研究院 | Dry slagging cooling air processing system |
| CN202747339U (en) * | 2012-07-27 | 2013-02-20 | 大唐华银电力股份有限公司 | Bottom slag transport system for a circulating fluidized bed boiler with faulty coal as fuel |
| CN103939924A (en) * | 2014-03-05 | 2014-07-23 | 北京国电富通科技发展有限责任公司 | Intelligent control system for dry slag cooling air amount |
| CN206449663U (en) * | 2017-01-23 | 2017-08-29 | 扬州荣辉化工设备有限公司 | Three-stage cools down slag extractor |
-
2019
- 2019-12-18 CN CN201911312278.1A patent/CN111290447A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101660760A (en) * | 2009-05-20 | 2010-03-03 | 北京国电富通科技发展有限责任公司 | Dry-type slag-conveying device |
| CN202419677U (en) * | 2011-10-24 | 2012-09-05 | 河北省电力勘测设计研究院 | Dry slagging cooling air processing system |
| CN202747339U (en) * | 2012-07-27 | 2013-02-20 | 大唐华银电力股份有限公司 | Bottom slag transport system for a circulating fluidized bed boiler with faulty coal as fuel |
| CN103939924A (en) * | 2014-03-05 | 2014-07-23 | 北京国电富通科技发展有限责任公司 | Intelligent control system for dry slag cooling air amount |
| CN206449663U (en) * | 2017-01-23 | 2017-08-29 | 扬州荣辉化工设备有限公司 | Three-stage cools down slag extractor |
Non-Patent Citations (1)
| Title |
|---|
| 王新 等: "《工程测试与过程控制系统》", 30 September 2017 * |
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