CN111637488A - Hydraulic deslagging type four-corner cut circular boiler coke falling monitoring and automatic stable combustion system - Google Patents

Hydraulic deslagging type four-corner cut circular boiler coke falling monitoring and automatic stable combustion system Download PDF

Info

Publication number
CN111637488A
CN111637488A CN202010378674.0A CN202010378674A CN111637488A CN 111637488 A CN111637488 A CN 111637488A CN 202010378674 A CN202010378674 A CN 202010378674A CN 111637488 A CN111637488 A CN 111637488A
Authority
CN
China
Prior art keywords
layer
bef
aft
dynamic pressure
boiler
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.)
Granted
Application number
CN202010378674.0A
Other languages
Chinese (zh)
Other versions
CN111637488B (en
Inventor
苏攀
祝广场
于鹏峰
刘林波
张才稳
韩静
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huadian Electric Power Research Institute Co Ltd
Original Assignee
Huadian Electric Power Research Institute Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Huadian Electric Power Research Institute Co Ltd filed Critical Huadian Electric Power Research Institute Co Ltd
Priority to CN202010378674.0A priority Critical patent/CN111637488B/en
Publication of CN111637488A publication Critical patent/CN111637488A/en
Application granted granted Critical
Publication of CN111637488B publication Critical patent/CN111637488B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M11/00—Safety arrangements
    • F23M11/04—Means for supervising combustion, e.g. windows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/025—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
    • F23N5/206—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/26—Details
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/02—Reliability analysis or reliability optimisation; Failure analysis, e.g. worst case scenario performance, failure mode and effects analysis [FMEA]

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Evolutionary Computation (AREA)
  • Geometry (AREA)
  • General Physics & Mathematics (AREA)
  • Regulation And Control Of Combustion (AREA)

Abstract

The invention discloses a hydraulic deslagging type four-corner tangential boiler coke falling monitoring and automatic stable combustion system, which comprises a hearth, wherein the hearth is provided with hearth pressure measuring points, and a layer C burner fire detection probe, a layer C burner oil gun, a layer B burner fire detection probe, a layer B burner oil gun, a layer A burner first fire detection probe, a layer A burner oil gun and a layer A burner second fire detection probe are sequentially arranged in a burner area from top to bottom; the first baffle and the second baffle are respectively connected with the cold ash hoppers on the left side and the right side of the hearth; a slag conveyor is arranged at the bottom of the hearth, and a first dynamic pressure sensor, a first thermocouple and a first electronic liquid level sensor are arranged on the left side of the slag conveyor; no. two dynamic pressure sensors, No. two thermocouples and No. two electronic liquid level sensors are arranged on the right side of the slag conveyor. The invention can effectively avoid the problem of non-stop of the unit caused by the coke falling problem of the boiler and improve the safe and stable operation level of the unit.

Description

Hydraulic deslagging type four-corner cut circular boiler coke falling monitoring and automatic stable combustion system
Technical Field
The invention relates to a hydraulic deslagging type four-corner tangential boiler coke falling monitoring and automatic combustion stabilizing system.
Background
The coke dropping problem of a coal-fired power plant is one of main factors influencing the safe and stable operation of boiler equipment, and the coking reasons of a boiler are more, for example, the coal types for combustion deviate from the designed coal types, and the coal types for combustion belong to easy-coking coal types with the softening temperature lower than the designed value; the design section of the boiler furnace has higher heat load, the design structure of the burner has original defects and the like, boiler coking is easily caused, and the problem is difficult to effectively solve; in addition, the problem of coking is easily caused by unreasonable control of parameters such as primary and secondary air distribution, oxygen amount and the like in the combustion adjustment of the boiler. After the boiler has coking tendency, the soot blowing effect of the boiler is poor, and the long-term low-load operation of a unit cannot carry out hearth soot blowing or the soot blowing is not timely, so that the problem of boiler coke falling is easily caused.
For the water conservancy deslagging formula boiler, because of great burnt piece falls into behind the dragveyer sediment fill from the furnace eminence, thermal shock effect produces a large amount of steam and gets into furnace, and the burnt fast whereabouts process causes the interference to furnace power field simultaneously, and combustion stability descends, generally can appear in the very short time combustor fire detection signal and weaken or the furnace pressure fluctuation, very easily triggers boiler main protection action, causes the boiler abnormal shutdown, and serious threat unit equipment security and economic loss are big. At present, operators judge the coke falling condition inside a boiler only through fire detection signals, hearth pressure and experience, the operation adjustment is not timely, the technical means for monitoring the coke falling of the boiler is incomplete at present, and a technical scheme for combining the coke falling monitoring of the boiler with the stable combustion of the boiler does not exist. Therefore, through combining the sensor technology of different grade type, fall burnt effective monitoring in the stove to carry out interlocking protection through the distributed control system of power plant, carry out the boiler automatically and stabilize the burning operation, in order to guarantee unit safety and stability operation, can improve the intelligent operation level of boiler.
Disclosure of Invention
The invention provides a boiler coke falling monitoring and automatic stable combustion system aiming at the problem of coke falling of a hydraulic deslagging type four-corner tangential boiler, which can monitor the changes of airflow dynamic pressure at the bottom of a hearth, slag water temperature of a slag conveyor and liquid level fluctuation in real time according to different sensor technologies, automatically judge the problem of coke falling of the boiler in real time by acquiring and calculating sensor data and boiler operation data, and automatically carry out stable combustion operation of the boiler by interlocking protection of a power plant distributed control system.
The technical scheme adopted by the invention for solving the problems is as follows: a hydraulic deslagging type four-corner tangential boiler coke falling monitoring and automatic combustion stabilizing system is characterized by comprising a hearth, wherein hearth pressure measuring points are arranged in the hearth, and a layer C burner fire detection probe, a layer C burner oil gun, a layer B burner fire detection probe, a layer B burner oil gun, a layer A burner first fire detection probe, a layer A burner oil gun and a layer A burner second fire detection probe are sequentially arranged in a burner area from top to bottom; the first baffle and the second baffle are respectively connected with the cold ash hoppers on the left side and the right side of the hearth and are arranged in parallel with the cold ash hoppers; the bottom of the hearth is provided with a slag conveyor, a first dynamic pressure sensor, a first thermocouple and a first electronic liquid level sensor are arranged on the left side of the slag conveyor, the first dynamic pressure sensor is horizontally arranged, the first thermocouple and the first electronic liquid level sensor are vertically arranged, and the right ends of the first dynamic pressure sensor, the first thermocouple and the first electronic liquid level sensor are not more than the vertical surface where the right end of the first baffle is located; no. two dynamic pressure sensors, No. two thermocouples and No. two electron level sensor arrange in the right side of dragveyer, No. two dynamic pressure sensors level is arranged, No. two thermocouples and No. two electron level sensor vertical arrange, No. two dynamic pressure sensors, No. two thermocouples and No. two electron level sensor's left end is no longer than the left end place perpendicular of No. two baffles.
Furthermore, the first thermocouple and the first electronic liquid level sensor are both connected with the DCS processor, and the first dynamic pressure sensor is connected with the pressure transmitter and then connected with the DCS processor; two pressure leading pipes of the first dynamic pressure sensor are respectively connected with a first compressed air electromagnetic valve and a second compressed air electromagnetic valve, and the first compressed air electromagnetic valve and the second compressed air electromagnetic valve are connected in parallel and then connected with a compressed air manual valve and a compressed air pipeline; the arrangement modes of the second dynamic pressure sensor, the second thermocouple and the second electronic liquid level sensor are the same as those of the first dynamic pressure sensor, the first thermocouple and the first electronic liquid level sensor.
Further, the hearth pressure measuring point, the flame detection probe of the layer C burner, the flame detection probe of the layer B burner, the flame detection probe of the layer A burner I and the flame detection probe of the layer A burner II are connected with the DCS processor; the layer C burner oil gun, the layer B burner oil gun and the layer A burner oil gun are respectively connected with a layer C burner oil gun electromagnetic valve, a layer B burner oil gun electromagnetic valve and a layer A burner oil gun electromagnetic valve, and the layer C burner oil gun electromagnetic valve, the layer B burner oil gun electromagnetic valve and the layer A burner oil gun electromagnetic valve are connected in parallel and then connected with a fuel pipeline main electromagnetic valve; and the layer C burner oil gun electromagnetic valve, the layer B burner oil gun electromagnetic valve and the layer A burner oil gun electromagnetic valve are connected to the DCS processor.
Furthermore, the layer A combustor of the hearth adopts a double-fire detection probe arrangement mode, and after the fire detection probe of the layer A combustor I and the fire detection probe of the layer A combustor II both meet the combustor fire extinguishing protection conditions, corresponding combustor fire extinguishing protection actions are triggered; the constant-period purging is carried out on the first dynamic pressure sensor and the second dynamic pressure sensor by switching on and off the compressed air solenoid valve, and the single-time purging time and the purging time interval are respectively set to tcAnd tj。
Further, a large coke block at a high position in the hearth falls to the slag conveyor, a large amount of water vapor generated by a thermal shock effect enters the hearth, the combustion stability is reduced, boiler coke falling monitoring is carried out through a first dynamic pressure sensor, a second dynamic pressure sensor, a first thermocouple, a second thermocouple, a first electronic liquid level sensor, a second electronic liquid level sensor and a hearth pressure measuring point, and the boiler coke falling judgment and calculation method of each sensor comprises the following steps:
a. in the coke dropping judgment and calculation method of the dynamic pressure sensor boiler,
such as △ P1,aft/△t1,aft>△P1,bef/△t1,bef+△P1,maxMarked as [ + P1]Indicates that this logic condition is satisfied, and the negative is marked as [ -P ]1]Indicating that this logical condition is not satisfied;
such as △ P2,aft/△t2,aft>△P2,bef/△t2,bef+△P2,maxMarked as [ + P2]Indicates that this logic condition is satisfied, and the negative is marked as [ -P ]2]Indicating that this logical condition is not satisfied;
in the formula, for a dynamic pressure sensor, P1,aftDynamic pressure after decoking, t1,aftTime after decoking, P1,befDynamic pressure, t, before decoking1,befTime before decoking, △ P1,maxMaximum dynamic pressure fluctuations during normal operation of the boiler; for dynamic pressure sensors of number two, P2,aftDynamic pressure after decoking, t2,aftTime after decoking, P2,befDynamic pressure, t, before decoking2,befTime before decoking, △ P2,maxMaximum dynamic pressure fluctuations during normal operation of the boiler;
b. in the judgment and calculation method for coke dropping of the thermocouple boiler,
such as △ T1,aft/△t1,aft>△T1,bef/△t1,bef+△T1,maxMarked as [ + T1]Indicates that this logic condition is satisfied, and if not, the flag is [ -T ]1]Indicating that this logical condition is not satisfied;
such as △ T2,aft/△t2,aft>△T2,bef/△t2,bef+△T2,maxMarked as [ + T2]Indicates that this logic condition is satisfied, and if not, the flag is [ -T ]2]Indicating that this logical condition is not satisfied;
in the formula, for thermocouple I, T1,aftTemperature of the decoking slag water, t1,aftTime after decoking, T1,befTemperature of slag water before decoking, t1,befTime before decoking, △ T1,maxMaximum slag water temperature fluctuations during normal boiler operation; for thermocouple II, T2,aftTemperature of the decoking slag water, t2,aftTime after decoking, T2,befTemperature of slag water before decoking, t2,befTime before decoking, △ T2,max―The maximum slag water temperature fluctuation when the boiler normally operates;
b. in the coke dropping judgment and calculation method of the boiler with the electronic liquid level sensor,
e.g. △ H1,aft/△t1,aft>△H1,bef/△t1,bef+△H1,maxMarked as [ + H1]Indicates that this logic condition is satisfied, and if not, the flag is [ -H1]Indicating that this logical condition is not satisfied;
e.g. △ H2,aft/△t2,aft>△H2,bef/△t2,bef+△H2,maxMarked as [ + H2]Indicates that this logic condition is satisfied, and if not, the flag is [ -H2]Indicating that this logical condition is not satisfied;
in the formula, for the electronic liquid level sensor I, H1,aftMaximum amplitude, t, of fluctuation of liquid level of slag water after decoking1,aftTime after decoking, H1,befMaximum amplitude, t, of fluctuation of liquid level of slag water before decoking1,befTime before decoking, △ H1,maxMaximum amplitude of fluctuation of the liquid level of the slag water during normal operation of the boiler; for electronic level sensors II, H2,aftMaximum amplitude, t, of fluctuation of liquid level of slag water after decoking2,aftTime after decoking, H2,befMaximum amplitude, t, of fluctuation of liquid level of slag water before decoking2,befTime before decoking, △ H2,maxMaximum amplitude of fluctuation of the liquid level of the slag water during normal operation of the boiler;
b. in the coke dropping judgment and calculation method of the boiler at the furnace pressure measuring point,
such as: l Pl│>PoIndicates thatThe logical condition is not satisfied if no;
in the formula, PlMeasured furnace pressure, Po-a pressure set value.
Further, dynamic pressure signal change, slag water temperature and liquid level fluctuation change at the bottom of the hearth after coke falling of the hearth are identified, automatic stable combustion protection action of the boiler is triggered through logic judgment, the condition that the temperature of the hearth is greater than 900 ℃ is met, and the logic judgment method comprises the following steps:
a.[+P1]&[+P2]、[+T1]&[+T2]and [ + H1]&[+H2]In, one of three conditions is satisfied, and | Pl│>PoTriggering oil spraying protection action of an oil gun of the layer A combustor;
b.[+P1]&[+P2]、[+T1]&[+T2]and [ + H1]&[+H2]In, two conditions of three out are satisfied, and-Pl│>PoTriggering oil spraying protection actions of the layer A burner oil guns and the layer B burner oil guns;
c.[+P1]&[+P2]、[+T1]&[+T2]and [ + H1]&[+H2]In the three-out-of-three condition, and-Pl│>PoTriggering the oil spraying protection actions of the layer A burner oil guns, the layer B burner oil guns and the layer C burner oil guns;
c. after the protection action is executed, when the logic condition is not met, and the oil injection time interval of the oil gun of the combustor is tpThen, the fuel injection operation is stopped.
Compared with the prior art, the invention has the following advantages and effects: (1) the coke falling problem in the boiler is effectively monitored by collecting sensor data and boiler operation data, and can be accurately and timely found out by automatically calculating and judging in real time through a factory distributed control system; (2) the grade is judged according to the coke falling problem, the distributed control system is subjected to interlocking protection, stable combustion operation of the boiler is automatically carried out, and the intelligent operation level of the boiler can be improved; (3) through implementing this technical scheme, can effectively avoid taking place the unit non-because of the boiler falls burnt problem and stop the problem, improve unit safety and stability operation level.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the system according to the embodiment of the present invention;
FIG. 2 is a schematic diagram of a system control structure according to an embodiment of the present invention;
FIG. 3 is a logic protection diagram for automatic stable combustion of a boiler in an embodiment of the invention.
In the figure: a hearth 1, a hearth pressure measuring point 2, a C-layer combustor fire detection probe 3, a C-layer combustor oil gun 4, a B-layer combustor fire detection probe 5, a B-layer combustor oil gun 6, a first A-layer combustor fire detection probe 7, a first A-layer combustor oil gun 8, a second A-layer combustor fire detection probe 9, a slag salvaging machine 10, a first baffle 11, a second baffle 12, a first dynamic pressure sensor 13 and a second dynamic pressure sensor 14, the system comprises a first thermocouple 15, a second thermocouple 16, a first electronic liquid level sensor 17, a second electronic liquid level sensor 18, a pressure transmitter 19, a DCS processor 20, a compressed air pipeline 21, a compressed air manual valve 22, a first compressed air electromagnetic valve 23, a second compressed air electromagnetic valve 24, a layer C burner oil gun electromagnetic valve 25, a layer B burner oil gun electromagnetic valve 26, a layer A burner oil gun electromagnetic valve 27 and a fuel pipeline main electromagnetic valve 28.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples are given.
A first unit of a certain company is a 300MW unit, all boilers are subcritical parameter, natural circulation steam pocket boilers, single hearth, single intermediate reheating, four-corner tangential circle combustion mode, intermediate storage bin type pulverizing system, balanced ventilation, n-shaped open-air arrangement, solid state deslagging and wet slag salvaging machine. 6 months in 2014, the denitration modification project of the unit is matched, and the low-nitrogen device of the boiler is modified by a middle-section ring stand (Wuhan) energy technology limited company. The boiler coking is serious due to poor quality of coal for combustion, and the problem of coke dropping and fire extinguishing of the unit I appears for many times.
The first unit is connected to the grid after minor repair is finished in 2018 in 10 months, and on a certain day in 2019 in 1 month,18:34, normal operation of the first unit, 165MW load, 12.8MPa main steam pressure, 538 ℃ main steam temperature, 536 ℃ reheated steam temperature, 13.3MPa steam drum pressure, 507t/h main steam flow, 511t/h water supply flow, fluctuation of furnace pressure between-20 Pa and-120 Pa, water level of the steam drum of-9 mm, and total air volume of 795-820 kNm3Fluctuation is carried out between the times per hour, the average oxygen amount is 5.2 percent, the total fuel amount is 70t/h, the powder feeder operates in the angles of No. 1 and No. 3 of the layer A/B/C/D and the layer E (wherein the revolution of each layer is respectively 530r/min, 500r/min, 420r/min, 400r/min and 240r/min), and the fire detection intensity of each operating burner is over 80 percent. The induced draft fan A/B, the blower A/B, the primary air fan A/B and the pulverizing system A/B/D operate.
18:34:08, the negative pressure of the first unit hearth begins to fluctuate and starts to increase from-118 Pa, the highest temperature of 18:34:09 rises to +284Pa, and the lowest temperature of 18:34:19 falls to-1003 Pa. 18:34:20, boiler I MFT, machine I and system II, and MFT starts 'fire extinguishing in the whole furnace chamber'. After the comprehensive inspection and the boiler purging, the first boiler is ignited at a ratio of 20: 10. And 23:15, connecting the first unit with the grid.
Analysis shows that the MFT reason of the boiler is as follows: fire extinguishing protection action of the whole furnace; the fire extinguishing reason of the whole furnace chamber is as follows: a unit low-load operation combustion stability is relatively poor, takes place in the operation furnace and falls burnt, and a large amount of burnt pieces fall to in dragging for the sediment machine, and the water in the sediment well is heated rapidly, produces big steam, and steam rises to cause the interior burning of stove to worsen sharply, leads to A, B, C, D, E layers of combustor fire to examine no fire, triggers the whole furnace chamber and puts out a fire. Coking and coke dropping reasons of the boiler: the unit runs continuously for a long time and frequently participates in peak regulation, the situation that the combustion adjustment is not timely occurs frequently to cause weakening of a power field in the furnace, and a main burner area is coked and gradually accumulated; the coal as fired is mixed for many times, and the coal quality with low volatile components for combustion is generated, so that the coking of the boiler is intensified; in the recent period, the peak-valley load of the unit is adjusted frequently, and coke falling is caused by thermal load disturbance of the boiler.
Aiming at the problems, the boiler is locally technically improved, referring to fig. 1 and fig. 2, a boiler coke falling monitoring and automatic combustion stabilizing system is adopted and comprises a hearth 1, hearth pressure measuring points 2 are arranged on the hearth 1, and a C-layer combustor fire detection probe 3, a C-layer combustor oil gun 4, a B-layer combustor fire detection probe 5, a B-layer combustor oil gun 6, a first-layer combustor fire detection probe 7, a first-layer combustor oil gun 8 and a second-layer combustor fire detection probe 9 are sequentially arranged in a combustor area from top to bottom; the first baffle 11 and the second baffle 12 are respectively connected with the cold ash hoppers on the left side and the right side of the hearth 1, and the first baffle 11 and the second baffle 12 are arranged in parallel with the cold ash hoppers; a slag conveyor 10 is configured at the bottom of the hearth 1, a first dynamic pressure sensor 13, a first thermocouple 15 and a first electronic liquid level sensor 17 are arranged on the left side of the slag conveyor 10, the first dynamic pressure sensor 13 is horizontally arranged, the first thermocouple 15 and the first electronic liquid level sensor 17 are vertically arranged, and the right ends of the first dynamic pressure sensor 13, the first thermocouple 15 and the first electronic liquid level sensor 17 are not more than the vertical plane where the right end of the first baffle 11 is located; no. two dynamic pressure sensor 14, No. two thermocouples 16 and No. two electron level sensor 18 arrange in the right side of dragveyer, and No. two dynamic pressure sensor 14 level is arranged, and No. two thermocouples 16 and No. two electron level sensor 18 are vertical to be arranged, and No. two dynamic pressure sensor 14, No. two thermocouples 16 and No. two electron level sensor 18's left end is no longer than the vertical plane of No. two baffle 12's left end place.
The first thermocouple 15 and the first electronic liquid level sensor 17 are both connected with the DCS processor 20, and the first dynamic pressure sensor 13 is connected with the pressure transmitter 19 and then connected with the DCS processor 20; two pressure leading pipes of the first dynamic pressure sensor 13 are respectively connected with a first compressed air electromagnetic valve 23 and a second compressed air electromagnetic valve 24, and the first compressed air electromagnetic valve 23 and the second compressed air electromagnetic valve 24 are connected in parallel and then are connected with a compressed air manual valve 22 and a compressed air pipeline 21; the arrangement of the dynamic pressure sensor 14, the thermocouple 16 and the electronic level sensor 18 is the same as that of the dynamic pressure sensor 13, the thermocouple 15 and the electronic level sensor 17.
The hearth pressure measuring point 2, the flame detection probe 3 of the combustor on the layer C, the flame detection probe 5 of the combustor on the layer B, the first flame detection probe 7 of the combustor on the layer A and the second flame detection probe 9 of the combustor on the layer A are connected with the DCS processor 20; the layer C burner oil gun 4, the layer B burner oil gun 6 and the layer A burner oil gun 8 are respectively connected with the layer C burner oil gun electromagnetic valve 25, the layer B burner oil gun electromagnetic valve 26 and the layer A burner oil gun electromagnetic valve 27, and the layer C burner oil gun electromagnetic valve 25, the layer B burner oil gun electromagnetic valve 26 and the layer A burner oil gun electromagnetic valve 27 are connected in parallel and then connected with the fuel pipeline main electromagnetic valve 28; the layer C burner oil gun electromagnetic valve 25, the layer B burner oil gun electromagnetic valve 26 and the layer A burner oil gun electromagnetic valve 27 are connected to the DCS processor 20.
A layer A combustor of the hearth 1 adopts a double-fire-detection-probe arrangement mode, and after a first fire detection probe 7 and a second fire detection probe 9 of the layer A combustor meet the combustor fire-extinguishing protection conditions, corresponding combustor fire-extinguishing protection actions are triggered; the first dynamic pressure sensor 13 and the second dynamic pressure sensor 14 are purged in a fixed period by switching the second compressed air solenoid valve 24, and the single-time purging time and the purging time interval are respectively set to tcAnd tj。
The large coke blocks at the middle and high positions in the hearth 1 fall down to the slag conveyor 10, a large amount of water vapor generated by thermal shock effect enters the hearth 1, the combustion stability is reduced, the boiler coke falling monitoring is carried out through a first dynamic pressure sensor 13, a second dynamic pressure sensor 14, a first thermocouple 15, a second thermocouple 16, a first electronic liquid level sensor 17, a second electronic liquid level sensor 18 and a hearth pressure measuring point 2, and the boiler coke falling judgment and calculation method of each sensor is as follows:
a. in the coke dropping judgment and calculation method of the dynamic pressure sensor boiler,
such as △ P1,aft/△t1,aft>△P1,bef/△t1,bef+△P1,maxMarked as [ + P1]Indicates that this logic condition is satisfied, and the negative is marked as [ -P ]1]Indicating that this logical condition is not satisfied;
such as △ P2,aft/△t2,aft>△P2,bef/△t2,bef+△P2,maxMarked as [ + P2]Indicates that this logic condition is satisfied, and the negative is marked as [ -P ]2]Indicating that this logical condition is not satisfied;
in the formula, P is a dynamic pressure sensor 131,aftDynamic pressure after decoking, t1,aftTime after decoking, P1,befDynamic pressure, t, before decoking1,befTime before decoking, △ P1,maxMaximum movement during normal operation of the boilerPressure fluctuation; for dynamic pressure sensor number two 14, P2,aftDynamic pressure after decoking, t2,aftTime after decoking, P2,befDynamic pressure, t, before decoking2,befTime before decoking, △ P2,maxMaximum dynamic pressure fluctuations during normal operation of the boiler;
b. in the judgment and calculation method for coke dropping of the thermocouple boiler,
such as △ T1,aft/△t1,aft>△T1,bef/△t1,bef+△T1,maxMarked as [ + T1]Indicates that this logic condition is satisfied, and if not, the flag is [ -T ]1]Indicating that this logical condition is not satisfied;
such as △ T2,aft/△t2,aft>△T2,bef/△t2,bef+△T2,maxMarked as [ + T2]Indicates that this logic condition is satisfied, and if not, the flag is [ -T ]2]Indicating that this logical condition is not satisfied;
in the formula, for thermocouple No. one 15, T1,aftTemperature of the decoking slag water, t1,aftTime after decoking, T1,befTemperature of slag water before decoking, t1,befTime before decoking, △ T1,maxMaximum slag water temperature fluctuations during normal boiler operation; for thermocouple number two 16, T2,aftTemperature of the decoking slag water, t2,aftTime after decoking, T2,befTemperature of slag water before decoking, t2,befTime before decoking, △ T2,max―The maximum slag water temperature fluctuation when the boiler normally operates;
b. in the coke dropping judgment and calculation method of the boiler with the electronic liquid level sensor,
e.g. △ H1,aft/△t1,aft>△H1,bef/△t1,bef+△H1,maxMarked as [ + H1]Indicates that this logic condition is satisfied, and if not, the flag is [ -H1]Indicating that this logical condition is not satisfied;
e.g. △ H2,aft/△t2,aft>△H2,bef/△t2,bef+△H2,maxMarked as [ + H2]Indicates that the logical condition is satisfied, NoIs marked as [ -H ]2]Indicating that this logical condition is not satisfied;
in the formula, for the electronic liquid level sensor 17I, H1,aftMaximum amplitude, t, of fluctuation of liquid level of slag water after decoking1,aftTime after decoking, H1,befMaximum amplitude, t, of fluctuation of liquid level of slag water before decoking1,befTime before decoking, △ H1,maxMaximum amplitude of fluctuation of the liquid level of the slag water during normal operation of the boiler; for electronic level sensor number two 18, H2,aftMaximum amplitude, t, of fluctuation of liquid level of slag water after decoking2,aftTime after decoking, H2,befMaximum amplitude, t, of fluctuation of liquid level of slag water before decoking2,befTime before decoking, △ H2,maxMaximum amplitude of fluctuation of the liquid level of the slag water during normal operation of the boiler;
b. in the coke dropping judgment and calculation method of the boiler at the furnace pressure measuring point,
such as: l Pl│>PoIf the logic condition is satisfied, the logic condition is not satisfied;
in the formula, PlMeasured furnace pressure, Po-a pressure set value.
The dynamic pressure signal change, the slag water temperature and the liquid level fluctuation change at the bottom of the hearth 1 are identified after the hearth 1 loses coke, the automatic stable combustion protection action of the boiler is triggered through logic judgment, the condition that the temperature of the hearth 1 is greater than 900 ℃ is met, and the logic judgment method comprises the following steps:
a.[+P1]&[+P2]、[+T1]&[+T2]and [ + H1]&[+H2]In, one of three conditions is satisfied, and | Pl│>PoTriggering the oil spraying protection action of an oil gun 8 of the layer A combustor;
b.[+P1]&[+P2]、[+T1]&[+T2]and [ + H1]&[+H2]In, two conditions of three out are satisfied, and-Pl│>PoTriggering the oil spraying protection actions of the layer A burner oil guns 8 and the layer B burner oil guns 6;
c.[+P1]&[+P2]、[+T1]&[+T2]and [ + H1]&[+H2]In the three-out-of-three condition, and-Pl│>PoTriggering the oil spraying protection actions of the layer A burner oil guns 8, the layer B burner oil guns 6 and the layer C burner oil guns 4;
c. after the protection action is executed, when the logic condition is not met, and the oil injection time interval of the oil gun of the combustor is tpThen, the fuel injection operation is stopped.
After the boiler is transformed and the starting operation is finished, t is set respectivelyc、tjAnd PoEqual parameter, real-time calculation △ P in the boiler operation process1,max、△P2,max、△T1,max、△T2,max、△H1,maxAnd △ H2,maxAnd (5) waiting for parameters, and putting the boiler into coke falling monitoring and automatic stable combustion logic protection. The temperature of the hearth is greater than 900 ℃, [ + P ] at a certain day after the boiler operates for 3 months1]&[+P2]、[+T1]&[+T2]And [ + H1]&[+H2]In, one of three conditions is satisfied, and | Pl│>PoAnd the oil gun of the layer A burner is triggered to spray oil to protect the action, so that stable combustion is carried out on the boiler in time, and the safe and stable operation of the unit is ensured.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.

Claims (6)

1. A hydraulic deslagging type four-corner tangential boiler coke falling monitoring and automatic stable combustion system is characterized by comprising a hearth (1), wherein hearth pressure measuring points (2) are arranged on the hearth (1), and a layer C burner fire detection probe (3), a layer C burner oil gun (4), a layer B burner fire detection probe (5), a layer B burner oil gun (6), a layer A burner first fire detection probe (7), a layer A burner oil gun (8) and a layer A burner second fire detection probe (9) are sequentially arranged in a burner area from top to bottom; the first baffle (11) and the second baffle (12) are respectively connected with the cold ash buckets on the left side and the right side of the hearth (1), and the first baffle (11) and the second baffle (12) are arranged in parallel with the cold ash buckets; the bottom of the hearth (1) is provided with a slag conveyor (10), a first dynamic pressure sensor (13), a first thermocouple (15) and a first electronic liquid level sensor (17) are arranged on the left side of the slag conveyor (10), the first dynamic pressure sensor (13) is horizontally arranged, the first thermocouple (15) and the first electronic liquid level sensor (17) are vertically arranged, and the right ends of the first dynamic pressure sensor (13), the first thermocouple (15) and the first electronic liquid level sensor (17) are not more than the vertical plane where the right end of the first baffle (11) is located; no. two dynamic pressure sensor (14), No. two thermocouples (16) and No. two electron level sensor (18) arrange in the right side of dragveyer, No. two dynamic pressure sensor (14) horizontal arrangement, No. two thermocouples (16) and No. two electron level sensor (18) vertical arrangement, No. two dynamic pressure sensor (14), No. two thermocouples (16) and No. two electron level sensor (18) the left end is no longer than the perpendicular plane of No. two baffle (12) the left end place.
2. The hydraulic deslagging type four-corner-cut circular boiler coke falling monitoring and automatic combustion stabilizing system according to claim 1, wherein the first thermocouple (15) and the first electronic liquid level sensor (17) are connected with a DCS processor (20), and the first dynamic pressure sensor (13) is connected with a pressure transmitter (19) and then is connected with the DCS processor (20); two pressure leading pipes of the first dynamic pressure sensor (13) are respectively connected with a first compressed air electromagnetic valve (23) and a second compressed air electromagnetic valve (24), and the first compressed air electromagnetic valve (23) and the second compressed air electromagnetic valve (24) are connected in parallel and then are connected with a compressed air manual valve (22) and a compressed air pipeline (21); the arrangement modes of the second dynamic pressure sensor (14), the second thermocouple (16) and the second electronic liquid level sensor (18) are the same as those of the first dynamic pressure sensor (13), the first thermocouple (15) and the first electronic liquid level sensor (17).
3. The hydraulic deslagging type four-corner tangential boiler coke falling monitoring and automatic combustion stabilizing system as recited in claim 1, wherein the furnace pressure measuring point (2), the burner fire detection probe (3) at the layer C, the burner fire detection probe (5) at the layer B, the first burner fire detection probe (7) at the layer A and the second burner fire detection probe (9) at the layer A are connected with a DCS processor (20); the layer C combustor oil gun (4), the layer B combustor oil gun (6) and the layer A combustor oil gun (8) are respectively connected with a layer C combustor oil gun electromagnetic valve (25), a layer B combustor oil gun electromagnetic valve (26) and a layer A combustor oil gun electromagnetic valve (27), and the layer C combustor oil gun electromagnetic valve (25), the layer B combustor oil gun electromagnetic valve (26) and the layer A combustor oil gun electromagnetic valve (27) are connected in parallel and then connected with a fuel pipeline main electromagnetic valve (28); and the layer C burner oil gun electromagnetic valve (25), the layer B burner oil gun electromagnetic valve (26) and the layer A burner oil gun electromagnetic valve (27) are connected to the DCS processor (20).
4. The hydraulic deslagging type four-corner-cutting circular boiler coke falling monitoring and automatic stable combustion system as claimed in claim 2, wherein a layer A combustor of a hearth (1) adopts a double-fire detection probe arrangement mode, and after a layer A combustor first fire detection probe (7) and a layer A combustor second fire detection probe (9) both meet combustor fire extinguishing protection conditions, corresponding combustor fire extinguishing protection actions are triggered; the constant-period purging is carried out on the first dynamic pressure sensor (13) and the second dynamic pressure sensor (14) by switching on and off the second compressed air solenoid valve (24), and the single-time purging time and the purging time interval are respectively set to tcAnd tj。
5. The hydraulic deslagging type four-corner tangential boiler coke-falling monitoring and automatic combustion stabilizing system according to any one of claims 1 to 3, characterized in that a large coke block at a high position in the furnace (1) falls to the slag conveyor (10), a large amount of water vapor is generated by a thermal shock effect to enter the furnace (1), the combustion stability is reduced, the boiler coke falling is monitored through a first dynamic pressure sensor (13), a second dynamic pressure sensor (14), a first thermocouple (15), a second thermocouple (16), a first electronic liquid level sensor (17), a second electronic liquid level sensor (18) and a furnace pressure measuring point (2), and the boiler coke falling judgment and calculation method of each sensor is as follows:
a. in the coke dropping judgment and calculation method of the dynamic pressure sensor boiler,
such as △ P1,aft/△t1,aft>△P1,bef/△t1,bef+△P1,maxMarked as [ + P1]Indicates that this logic condition is satisfied, and the negative is marked as [ -P ]1]Indicating that this logical condition is not satisfied;
such as △ P2,aft/△t2,aft>△P2,bef/△t2,bef+△P2,maxMarked as [ + P2]Indicates that this logic condition is satisfied, and the negative is marked as [ -P ]2]Indicating that this logical condition is not satisfied;
wherein, for the first dynamic pressure sensor (13), P1,aftDynamic pressure after decoking, t1,aftTime after decoking, P1,befDynamic pressure, t, before decoking1,befTime before decoking, △ P1,maxMaximum dynamic pressure fluctuations during normal operation of the boiler; for dynamic pressure sensor number two (14), P2,aftDynamic pressure after decoking, t2,aftTime after decoking, P2,befDynamic pressure, t, before decoking2,befTime before decoking, △ P2,maxMaximum dynamic pressure fluctuations during normal operation of the boiler;
b. in the judgment and calculation method for coke dropping of the thermocouple boiler,
such as △ T1,aft/△t1,aft>△T1,bef/△t1,bef+△T1,maxMarked as [ + T1]Indicates that this logic condition is satisfied, and if not, the flag is [ -T ]1]Indicating that this logical condition is not satisfied;
such as △ T2,aft/△t2,aft>△T2,bef/△t2,bef+△T2,maxMarked as [ + T2]Indicates that this logic condition is satisfied, and if not, the flag is [ -T ]2]Indicating that this logical condition is not satisfied;
wherein, for thermocouple number one (15), T1,aftTemperature of the decoking slag water, t1,aftTime after decoking, T1,befTemperature of slag water before decoking, t1,befTime before decoking, △ T1,maxMaximum slag water temperature fluctuations during normal boiler operation;
for thermocouple II (16), T2,aftTemperature of the decoking slag water, t2,aftTime after decoking, T2,befTemperature of slag water before decoking, t2,befTime before decoking, △ T2,max―The maximum slag water temperature fluctuation when the boiler normally operates;
b. in the coke dropping judgment and calculation method of the boiler with the electronic liquid level sensor,
e.g. △ H1,aft/△t1,aft>△H1,bef/△t1,bef+△H1,maxMarked as [ + H1]Indicates that this logic condition is satisfied, and if not, the flag is [ -H1]Indicating that this logical condition is not satisfied;
e.g. △ H2,aft/△t2,aft>△H2,bef/△t2,bef+△H2,maxMarked as [ + H2]Indicates that this logic condition is satisfied, and if not, the flag is [ -H2]Indicating that this logical condition is not satisfied;
in the formula, for the first electronic liquid level sensor (17), H1,aftMaximum amplitude, t, of fluctuation of liquid level of slag water after decoking1,aftTime after decoking, H1,befMaximum amplitude, t, of fluctuation of liquid level of slag water before decoking1,befTime before decoking, △ H1,maxMaximum amplitude of fluctuation of the liquid level of the slag water during normal operation of the boiler; for electronic level sensor number two (18), H2,aftMaximum amplitude, t, of fluctuation of liquid level of slag water after decoking2,aftTime after decoking, H2,befMaximum amplitude, t, of fluctuation of liquid level of slag water before decoking2,befTime before decoking, △ H2,maxMaximum amplitude of fluctuation of the liquid level of the slag water during normal operation of the boiler;
b. in the coke dropping judgment and calculation method of the boiler at the furnace pressure measuring point,
such as: l Pl│>PoIf the logic condition is satisfied, the logic condition is not satisfied;
in the formula, PlMeasured furnace pressure, Po-a pressure set value.
6. The hydraulic deslagging type four-corner-cut circular boiler coke falling monitoring and automatic combustion stabilizing system as claimed in claim 5, wherein dynamic pressure signal change, slag water temperature and liquid level fluctuation change at the bottom of the hearth (1) after coke falling of the hearth (1) are identified, through logical judgment, automatic combustion stabilizing protection action of the boiler is triggered, the condition that the temperature of the hearth (1) is greater than 900 ℃ is met, and the logical judgment method is as follows:
a.[+P1]&[+P2]、[+T1]&[+T2]and [ + H1]&[+H2]In, one of three conditions is satisfied, and | Pl│>PoTriggering the oil injection protection action of an oil gun (8) of the layer A burner;
b.[+P1]&[+P2]、[+T1]&[+T2]and [ + H1]&[+H2]In, two conditions of three out are satisfied, and-Pl│>PoTriggering oil spraying protection actions of the layer A burner oil guns (8) and the layer B burner oil guns (6);
c.[+P1]&[+P2]、[+T1]&[+T2]and [ + H1]&[+H2]In the three-out-of-three condition, and-Pl│>PoTriggering oil spraying protection actions of the layer A burner oil guns (8), the layer B burner oil guns (6) and the layer C burner oil guns (4);
c. after the protection action is executed, when the logic condition is not met, and the oil injection time interval of the oil gun of the combustor is tpThen, the fuel injection operation is stopped.
CN202010378674.0A 2020-05-07 2020-05-07 Hydraulic deslagging type four-corner cut circular boiler coke falling monitoring and automatic stable combustion system Active CN111637488B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010378674.0A CN111637488B (en) 2020-05-07 2020-05-07 Hydraulic deslagging type four-corner cut circular boiler coke falling monitoring and automatic stable combustion system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010378674.0A CN111637488B (en) 2020-05-07 2020-05-07 Hydraulic deslagging type four-corner cut circular boiler coke falling monitoring and automatic stable combustion system

Publications (2)

Publication Number Publication Date
CN111637488A true CN111637488A (en) 2020-09-08
CN111637488B CN111637488B (en) 2022-04-01

Family

ID=72331958

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010378674.0A Active CN111637488B (en) 2020-05-07 2020-05-07 Hydraulic deslagging type four-corner cut circular boiler coke falling monitoring and automatic stable combustion system

Country Status (1)

Country Link
CN (1) CN111637488B (en)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19638986A1 (en) * 1996-09-23 1998-03-26 Karl Von Wedel Arrangement for removing particulate material from a pressurised chamber
KR20100002682A (en) * 2008-06-30 2010-01-07 한국서부발전 주식회사 Clinker drop detection device
CN203981266U (en) * 2014-07-23 2014-12-03 国家电网公司 In a kind of station boiler, fall the real-time monitoring device of the burnt frequency
WO2016032414A1 (en) * 2014-08-26 2016-03-03 Agema Mühendi̇sli̇k Araştirma Geli̇şti̇rme Maki̇ne Endüstri̇yel Tesi̇sler Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Solid and liquid/gas fueled, fully automated, smokeless combustion hot water/steam boiler adjustable according to coal type
CN205208624U (en) * 2015-10-27 2016-05-04 国网山东省电力公司电力科学研究院 A pressure control device for coal fired boiler furnace hopper
CN107356200A (en) * 2017-07-03 2017-11-17 浙江大学 Slag measuring method and system in pulverized-coal fired boiler stove based on clinker track
WO2019013731A2 (en) * 2017-05-08 2019-01-17 Agema Muhendislik Arastirma Gelistirme Makine Endustriyel Tesisler Sanayi Ve Ticaret Anonim Sirketi Gasification process smokeless combustion, fully automated capacity and efficiency maximization solid fuel burner system
CN110056902A (en) * 2019-04-03 2019-07-26 华电电力科学研究院有限公司 A kind of system and its working method preventing wet type machinery slag-discharging boiler coke extinguishing
CN110762553A (en) * 2019-10-31 2020-02-07 国网河北省电力有限公司电力科学研究院 Method for preventing coke falling and fire extinguishing of boiler
WO2020054375A1 (en) * 2018-09-13 2020-03-19 日鉄エンジニアリング株式会社 Dry coke fire extinguishing apparatus and method for removing coke dust in boiler of dry coke fire extinguishing apparatus

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19638986A1 (en) * 1996-09-23 1998-03-26 Karl Von Wedel Arrangement for removing particulate material from a pressurised chamber
KR20100002682A (en) * 2008-06-30 2010-01-07 한국서부발전 주식회사 Clinker drop detection device
CN203981266U (en) * 2014-07-23 2014-12-03 国家电网公司 In a kind of station boiler, fall the real-time monitoring device of the burnt frequency
WO2016032414A1 (en) * 2014-08-26 2016-03-03 Agema Mühendi̇sli̇k Araştirma Geli̇şti̇rme Maki̇ne Endüstri̇yel Tesi̇sler Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Solid and liquid/gas fueled, fully automated, smokeless combustion hot water/steam boiler adjustable according to coal type
CN205208624U (en) * 2015-10-27 2016-05-04 国网山东省电力公司电力科学研究院 A pressure control device for coal fired boiler furnace hopper
WO2019013731A2 (en) * 2017-05-08 2019-01-17 Agema Muhendislik Arastirma Gelistirme Makine Endustriyel Tesisler Sanayi Ve Ticaret Anonim Sirketi Gasification process smokeless combustion, fully automated capacity and efficiency maximization solid fuel burner system
CN107356200A (en) * 2017-07-03 2017-11-17 浙江大学 Slag measuring method and system in pulverized-coal fired boiler stove based on clinker track
WO2020054375A1 (en) * 2018-09-13 2020-03-19 日鉄エンジニアリング株式会社 Dry coke fire extinguishing apparatus and method for removing coke dust in boiler of dry coke fire extinguishing apparatus
CN110056902A (en) * 2019-04-03 2019-07-26 华电电力科学研究院有限公司 A kind of system and its working method preventing wet type machinery slag-discharging boiler coke extinguishing
CN110762553A (en) * 2019-10-31 2020-02-07 国网河北省电力有限公司电力科学研究院 Method for preventing coke falling and fire extinguishing of boiler

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
陈之柏 等: "锅炉掉渣引起灭火的原因分析和预防", 《电站系统工程》 *

Also Published As

Publication number Publication date
CN111637488B (en) 2022-04-01

Similar Documents

Publication Publication Date Title
CN106678783A (en) Combustion optimization system and adjustment method for preventing water wall high-temperature corrosion
CN104633652B (en) Burning system of opposite firing boiler
CN112524637B (en) Boiler combustion optimization method and system based on air-powder and CO online monitoring
CN206739283U (en) A kind of depth peak regulation preheats low-load combustion-stabilizing combustion system with heat smoke
CN105783025A (en) Method for monitoring distribution of pulverized coal in low-NOx tangential coal-fired boiler
CN110762516B (en) Directional regulation and control method for combustion tissue in W-flame boiler
CN111609423A (en) Anti-slagging method based on boiler operation angle
CN111006239A (en) Method for automatically adjusting up-down position of flame center of hearth of front-and-back wall opposed pulverized coal fired boiler
CN104848252B (en) Micro- oil burner progress control method of 1050 megawatts of ultra supercritical pulverized-coal fired boilers
CN111637488B (en) Hydraulic deslagging type four-corner cut circular boiler coke falling monitoring and automatic stable combustion system
CN105202575A (en) Ignition method and device through high-temperature high oxygen torch generated by coal powder or crushed coal combustion
CN103292342A (en) Method for co-combusting Xinjiang Guanghui lignite in combusting bitumite boiler
CN105042632A (en) Control device and method for safety protection of boiler in oxygen-enriched combustion system
CN105757710B (en) A kind of accurate eastern coal mixes the optimization method of burning in the boiler of burning
CN105135411B (en) Prevent coal-burning boiler furnace hopper pressure jump from causing the regulating system and method for fire extinguishing
CN110762553B (en) Method for preventing coke falling and fire extinguishing of boiler
CN111006238A (en) Method for automatically adjusting up-down position of flame center of hearth of pulverized coal fired boiler with four tangential corners
CN110410768A (en) Pre- high temperature corrosion resistance System and method in Process In A Tangential Firing
CN213777698U (en) Stable combustion burner system
CN112856399B (en) Method for monitoring height of bed material in fluidized bed boiler operation in real time
CN110296386A (en) A kind of fuel control method under the coal unit FCB operating condition of Blending gas
CN106907736B (en) A kind of system and method for intelligent anti-furnace bottom combustible gas deflagrating
CN213119155U (en) Early warning system for preventing detonation in cold ash bucket area of power station boiler
CN215675286U (en) Early warning system for preventing flameout caused by coke collapse of boiler
CN217714977U (en) Soot blower

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant