CN109282283A - Heat-storage type burner combustion control device, control method and heat-storage type burner - Google Patents
Heat-storage type burner combustion control device, control method and heat-storage type burner Download PDFInfo
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- CN109282283A CN109282283A CN201811154405.5A CN201811154405A CN109282283A CN 109282283 A CN109282283 A CN 109282283A CN 201811154405 A CN201811154405 A CN 201811154405A CN 109282283 A CN109282283 A CN 109282283A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 204
- 238000005338 heat storage Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000003034 coal gas Substances 0.000 claims abstract description 71
- 239000000446 fuel Substances 0.000 claims abstract description 71
- 230000001105 regulatory effect Effects 0.000 claims abstract description 34
- 239000000203 mixture Substances 0.000 claims abstract description 20
- 238000004458 analytical method Methods 0.000 claims abstract description 15
- 230000001276 controlling effect Effects 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 113
- 230000008859 change Effects 0.000 description 17
- 239000001301 oxygen Substances 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- 239000003245 coal Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/027—Regulating fuel supply conjointly with air supply using mechanical means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The present invention provides a kind of heat-storage type burner combustion control devices, belong to heat-storage type burner technical field, including chamber temperature instrument, gas regulator and the combustion air regulating valve being electrically connected to the control system respectively；It further include the gas composition analysis meter and/or gas calorific value apparatus being electrically connected respectively with the control system；The control system includes automatic control unit, air-fuel ratio computing module and PID regulator.Additionally provide a kind of heat-storage type burner and heat-storage type burner method for controlling combustion.Heat-storage type burner combustion control device, control method and heat-storage type burner provided by the invention, it is intended to the technical issues of solving traditional coal gas circuit and air loop while using the control modes such as PID while adjusting, two control loops is caused to interfere with each other.
Description
Technical field
The invention belongs to heat-storage type burner technical fields, are to be related to a kind of heat-storage type burner burning more specifically
Control device, control method and heat-storage type burner.
Background technique
Heat-storage type burner is that normal temperature air is heated in a very short period of time, after the high temperature air being heated enters burner hearth,
The flue gas that volume inhales in surrounding furnace forms the thin oxygen deprivation high temperature gas flow that one oxygen content is significantly less than 21%, while past thin high temperature
Air nearby injects fuel, and fuel realizes burning under oxygen deprivation (2%~20%) state.Meanwhile the hot cigarette after furnace chamber inner combustion
Gas is emptied by another heat-storage type burner, and high-temperature flue gas sensible heat is stored in another heat-storage type burner.Work temperature
It spends not high reversal valve (22) to switch over certain frequency, common switching cycle is 0~300s.Two heat storage type combustions
Device is in accumulation of heat and heat release works alternatively state, to reach energy saving purpose.
The disturbance when control of heat-storage type burner is due to commutation to flow, traditional control method is coal gas circuit in addition
The control modes such as PID are used simultaneously with air loop while being adjusted, two control loops is caused to interfere with each other, and system puts into operation multiple
It is miscellaneous, it cannot achieve and automatically control for a long time, make Combustion System rely on operator's experience hand-manipulated substantially, heat-storage type burner
Gas consumption is big, and the insufficient hazardous emission of burning increases, and invents a kind of suitable for China, heat-storage type burner control easy to implement
Device processed and control method are significant.
Summary of the invention
The purpose of the present invention is to provide a kind of heat-storage type burner combustion control device, control method and heat storage type combustions
Device, it is intended to solve traditional coal gas circuit and air loop while use the control modes such as PID while adjusting, cause two controls
The technical issues of circuit interferes with each other.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of heat-storage type burner Combustion System dress is provided
It sets, including chamber temperature instrument, gas regulator and the combustion air regulating valve being electrically connected to the control system respectively；
It further include the gas composition analysis meter and/or gas calorific value apparatus being electrically connected respectively with the control system；
The control system includes automatic control unit, air-fuel ratio computing module and PID regulator；The PID regulator
The combustion chamber actual temperature detected for receiving the chamber temperature instrument, according to the combustion chamber actual temperature and burning
Room preset temperature controls gas regulator valve position；The air-fuel ratio computing module is for receiving the gas composition analyzer
Air-fuel ratio, the automatic control is calculated according to gas composition or calorific value of gas in the detection data of table or the gas calorific value apparatus
Unit processed combustion air regulating valve valve position according to the air-fuel ratio and the gas regulator control of valve position.
Further, the control system also respectively with gas temperature instrument, gas pressure instrument, gas flow instrument,
Combustion air pressure gauge, combustion air flow instrument, combustion air thermometric instrument and the electrical connection of coal gas fast cut valve.
Further, the control system is PLC control system or DCS control system.
Heat-storage type burner, including shell and claim or the heat-storage type burner combustion control device, the shell
The top or side of body are provided with combustion air burner, coal gas burner and the chamber temperature instrument, the combustion air burner with
Combustion-supporting air piping connection, the coal gas burner are connected to gas piping, and the combustion air thermometric instrument, the combustion air are adjusted
Valve, the combustion air flow instrument and the combustion air pressure gauge are arranged in the combustion-supporting air piping, the gas temperature
Instrument, the coal gas fast cut valve, the gas regulator, the gas flow instrument and the gas pressure instrument are arranged in institute
It states on gas piping, the gas calorific value apparatus and/or the gas composition analysis meter are also disposed on the gas piping.
Further, the combustion air burner includes the first combustion air burner and the second combustion air burner, and described first helps
Combustion wind burner and the second combustion air burner pass through reversal valve respectively and be connected to the combustion-supporting air piping, the reversal valve also with
Air-introduced machine connection, and the solenoid valve being electrically connected with the control system is additionally provided on the reversal valve, it is set on the air-introduced machine
It is equipped with air-introduced machine inlet temperature instrument, the automatic control unit is for receiving the air-introduced machine inlet temperature instrument detection knot
Fruit, and the valve events that commutate described in the solenoid valve control are passed through according to air-introduced machine inlet temperature.
Further, reversal valve setting on the ground, and the reversal valve by metal hose respectively with described the
One combustion air burner is connected with the second combustion air burner.
Further, the metal hose passes through steel pipe and the reversal valve, the first combustion air burner or institute respectively
State the connection of the second combustion air burner.
Heat-storage type burner method for controlling combustion, comprising the following steps:
Set given value of the combustion chamber preset temperature as PID regulator, combustion chamber measured by chamber temperature instrument
Actual temperature is as measured temperature；
Measured temperature and deviation from the index value are calculated, as the input data of the PID regulator, according to the PID tune
It saves device operation result and controls gas regulator valve position；
The detection data for receiving the gas composition analysis meter or the gas calorific value apparatus, according to the gas composition prestored
Or air-fuel ratio is calculated in calorific value of gas and the corresponding relationship of air-fuel ratio；
According to combustion air regulating valve valve position described in the air-fuel ratio and the gas regulator control of valve position.
Further, further comprising the steps of:
Commutation valve events are controlled according to air-introduced machine inlet temperature meter measurements, when the diverter valve outlet temperature is greater than
When preset value, the reversal valve commutation is controlled；
It is dynamic that the coal gas fast cut valve is controlled according to the gas pressure instrument or the combustion air pressure gauge testing result
Make, when gas pressure is lower than preset value lower than preset value or combustion air, the coal gas fast cut valve movement cutting coal gas.
Further, the combustion air regulating valve valve according to the air-fuel ratio and the gas regulator control of valve position
Position step institute is according to equation
FV2=β n*FV1
Wherein, β n is air-fuel ratio, and FV1 is gas regulator valve position, and FV2 is combustion air regulating valve valve position；
And when the value of β n*FV1 is more than 100%, FV2=100% is taken.
The beneficial effect of heat-storage type burner combustion control device provided by the invention and control method is: with existing skill
Art is compared, and heat-storage type burner combustion control device of the present invention and control method change traditional coal gas circuit and combustion air and return
The air-fuel ratio control mode that road uses the control modes such as PID simultaneously while adjusting has been changed to coal gas circuit using PID control side
Formula, combustion air circuit use the new paragon of control of valve position mode.In use, gas regulator valve position after PID is adjusted multiplied by
Setting value of the air-fuel ratio as combustion air regulating valve valve position, to control combustion air regulating valve, i.e. combustion air regulating valve valve position is set
Value=air-fuel ratio * gas regulator valve position.The change of valve position makes coal gas and combustion-supporting wind flow change, and then changes temperature
Become, realizes temperature automatic control.
The present invention utilizes traditional single loop pid control mode, the Complex Temperature of heat-storage type burner is controlled, i.e. coal gas
The double loop control that circuit and combustion air circuit intercouple, is reduced to coal gas circuit and combustion air circuit difference is completely self-contained
Unity loop control, i.e. coal gas circuit use single loop PID control, combustion air circuit using combustion air regulating valve valve position setting value=
The control mode of air-fuel ratio * gas regulator valve position controls, and is the huge innovation of Combustion System, solves conventional burners burning
Control problem, make burner combustion control become simply to be easily achieved and put into operation conveniently, reached gas saving, stablized burning
The purpose of room temperature, and in allowed limits by temperature control, fully meet the needs of the Combustion System of technique production.
The beneficial effect of heat-storage type burner provided by the invention is: compared with prior art, heat accumulating type combustion of the present invention
Burner uses heat-storage type burner combustion control device provided by the present invention and control method, utilizes traditional single loop
Pid control mode controls the Complex Temperature of heat-storage type burner, i.e. the double back that intercouples of coal gas circuit and combustion air circuit
Road control is reduced to coal gas circuit and combustion air circuit and distinguishes completely self-contained unity loop control, i.e. coal gas circuit uses single time
Road PID control, combustion air circuit use combustion air regulating valve valve position setting value=air-fuel ratio * gas regulator valve position controlling party
Formula control, is the huge innovation of Combustion System, solves the control problem of conventional burners burning, becomes burner combustion control
It obtains and is simply easily achieved and puts into operation conveniently, achieved the purpose that gas saving, stablized chamber temperature, and temperature control is being permitted
Perhaps in the range of, the needs of the Combustion System of technique production are fully met.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the control structure wire schematic diagram of heat-storage type burner combustion control device provided in an embodiment of the present invention；
Fig. 2 is the schematic view of the front view of heat-storage type burner provided in an embodiment of the present invention；
Fig. 3 is the overlooking structure diagram of heat-storage type burner provided in an embodiment of the present invention；
Fig. 4 is the logical schematic of heat-storage type burner method for controlling combustion provided in an embodiment of the present invention.
In figure: 1, control system；2, chamber temperature instrument；3, gas regulator；4, combustion air regulating valve；5, coal gas at
Divide analysis meter；6, gas calorific value apparatus；7, automatic control unit；8, air-fuel ratio computing module；10, gas temperature instrument；11, coal
Atmospheric pressure instrument；12, gas flow instrument；13, combustion air pressure gauge；14, combustion air flow instrument；15, combustion-supporting air temperature
Instrument；16, coal gas fast cut valve；17, shell；18, combustion air burner；181, the first combustion air burner；182, the second combustion air is burnt
Mouth；19, coal gas burner；20, combustion-supporting air piping；21, gas piping；22, reversal valve；23, solenoid valve；24, air-introduced machine；25, draw
Fans entrance thermometric instrument；26, metal hose；27, steel pipe.
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, tie below
Accompanying drawings and embodiments are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
Also referring to Fig. 1, now heat-storage type burner combustion control device provided in an embodiment of the present invention is illustrated.
The heat-storage type burner combustion control device, including be electrically connected respectively with control system 1 chamber temperature instrument 2, coal gas
Regulating valve 3 and combustion air regulating valve 4；It further include the gas composition analysis meter 5 and/or coal being electrically connected respectively with control system 1
Gas calorific value instrument 6；Control system 1 includes automatic control unit 7, air-fuel ratio computing module 8 and PID regulator；PID regulator is used for
The combustion chamber actual temperature that chamber temperature instrument 2 detects is received, according to combustion chamber actual temperature and combustion chamber preset temperature
Control 3 valve position of gas regulator；Air-fuel ratio computing module 8 is used to receive the inspection of gas composition analysis meter 5 or gas calorific value apparatus 6
Air-fuel ratio is calculated according to gas composition or calorific value of gas in measured data, and automatic control unit 7 is adjusted according to air-fuel ratio and coal gas
3 control of valve position combustion air regulating valve of valve, 4 valve position.
Heat-storage type burner combustion control device provided by the invention changes traditional coal gas compared with prior art
The air-fuel ratio control mode that circuit and combustion air circuit use the control modes such as PID simultaneously while adjusting, has been changed to coal gas circuit
Using pid control mode, combustion air circuit uses the new paragon of control of valve position mode.In use, the coal gas tune after PID is adjusted
Setting value of the valve valve position multiplied by air-fuel ratio as combustion air regulating valve valve position is saved, to control combustion air regulating valve 4, i.e. combustion air tune
Save valve valve position setting value=air-fuel ratio * gas regulator valve position.The change of valve position makes coal gas and combustion-supporting wind flow change,
And then change temperature, realize temperature automatic control.
The present invention utilizes traditional single loop pid control mode, the Complex Temperature of heat-storage type burner is controlled, i.e. coal gas
The double loop control that circuit and combustion air circuit intercouple, is reduced to coal gas circuit and combustion air circuit difference is completely self-contained
Unity loop control, i.e. coal gas circuit use single loop PID control, combustion air circuit using combustion air regulating valve valve position setting value=
The control mode of air-fuel ratio * gas regulator valve position controls, and is the huge innovation of Combustion System, solves conventional burners burning
Control problem, make burner combustion control become simply to be easily achieved and put into operation conveniently, reached gas saving, stablized burning
The purpose of room temperature, and in allowed limits by temperature control, fully meet the needs of the Combustion System of technique production.
As a kind of specific embodiment of heat-storage type burner combustion control device provided by the invention, referring to Fig. 1,
Control system 1 also respectively with gas temperature instrument 10, gas pressure instrument 11, gas flow instrument 12, combustion air pressure gauge
13, combustion air flow instrument 14, combustion air thermometric instrument 15 and coal gas fast cut valve 16 are electrically connected.
As a kind of specific embodiment of heat-storage type burner combustion control device provided by the invention, referring to Fig. 1,
Control system 1 is PLC control system or DCS control system.
Each instrument, electrical equipment pass through distributor respectively in the present invention or isolator is converted into 4~20mA and PLC or DCS
The input/output module of control system connects, and signal enters automatic control unit 7 after processing, handled by automatic control unit 7
After export to gas regulator 3 and combustion air regulating valve 4, realize the control to gas flow and combustion-supporting wind flow, and then realize
Control to chamber temperature.Automatic control unit 7 is the hardware or special module being built in PLC or DCS control system, together
When internal PID adjuster.
Part of devices model in the embodiment of the present invention is as follows:
Air-introduced machine inlet temperature instrument 25 is K-type thermocouple WRN-240；Chamber temperature instrument 2 is far infrared temperature measurement instrument
Pro SWF-16-30-C-FE；Gas pressure instrument 11 is EJA510A；Gas flow instrument 12 is that annular oriffice matches differential pressure transporting
Device, orifice plate model LGH, differential pressure transmitter are PMD235-KB4D2EB1C [GOT]；Gas regulator 3 is GYR71611-
DN150.PN6.D-BRL12S matches Siemens's valve positioner, 4~20mA input and output；Coal gas fast cut valve 16 is Q641--
16C—DN150；Gas temperature instrument 10 is thermocouple WRN-240；Combustion air pressure gauge 13 is EJA510A；Combustion-supporting wind flow
Instrument 14 is that standard throttle apparatus matches differential pressure transmitter, orifice plate model LGB, differential pressure transmitter PMD235-KB4D2EB1C
[GOT]；Combustion air regulating valve 4 is GYR71611-DN200.PN6.D-BRL14S, matches Siemens's valve positioner, and 4~20mA is defeated
Enter output；Combustion air thermometric instrument 15 is K-type thermocouple WRN-240；Gas composition analysis meter 5 is that GS-101M type divides automatically
Analyzer；Gas calorific value apparatus 6 is Germany's SMART2006 series caloric value instrument；PLC or DCS control system is Siemens S7-300 PLC system
System.
The above instrument, electrical equipment and control system are existing product mature in the market.
The present invention also provides a kind of heat-storage type burners, and please refer to figs. 2 and 3, including shell 17 and Claims 2 or 3
Heat-storage type burner combustion control device, the top or side of shell 17 are provided with combustion air burner 18, coal gas burner 19 and combustion
Room temperature instrument 2 is burnt, combustion air burner 18 is connected to combustion-supporting air piping 20, and coal gas burner 19 is connected to gas piping 21, combustion-supporting
Air temperature instrument 15, combustion air regulating valve 4, combustion air flow instrument 14 and combustion air pressure gauge 13 are arranged in combustion-supporting air piping
On 20, gas temperature instrument 10, coal gas fast cut valve 16, gas regulator 3, gas flow instrument 12 and gas pressure instrument 11 are set
It sets on gas piping 21, gas calorific value apparatus 6 and/or gas composition analysis meter 5 are also disposed on gas piping 21.
Heat-storage type burner provided by the invention changes traditional coal gas circuit and combustion air compared with prior art
The air-fuel ratio control mode that circuit uses the control modes such as PID simultaneously while adjusting has been changed to coal gas circuit using PID control side
Formula, combustion air circuit use the new paragon of control of valve position mode.In use, gas regulator valve position after PID is adjusted multiplied by
Setting value of the air-fuel ratio as combustion air regulating valve valve position, to control combustion air regulating valve 4, i.e. combustion air regulating valve valve position is set
Value=air-fuel ratio * gas regulator valve position.The change of valve position makes coal gas and combustion-supporting wind flow change, and then changes temperature
Become, realizes temperature automatic control.
The present invention utilizes traditional single loop pid control mode, the Complex Temperature of heat-storage type burner is controlled, i.e. coal gas
The double loop control that circuit and combustion air circuit intercouple, is reduced to coal gas circuit and combustion air circuit difference is completely self-contained
Unity loop control, i.e. coal gas circuit use single loop PID control, combustion air circuit using combustion air regulating valve valve position setting value=
The control mode of air-fuel ratio * gas regulator valve position controls, and is the huge innovation of Combustion System, solves conventional burners burning
Control problem, make burner combustion control become simply to be easily achieved and put into operation conveniently, reached gas saving, stablized burning
The purpose of room temperature, and in allowed limits by temperature control, fully meet the needs of the Combustion System of technique production.
As a kind of specific embodiment of heat-storage type burner combustion control device provided by the invention, Fig. 2 is please referred to
And Fig. 3, combustion air burner 18 include the first combustion air burner 181 and the second combustion air burner 182, the first combustion air burner 181
It is connected to respectively by reversal valve 22 with combustion-supporting air piping 20 with the second combustion air burner 182, reversal valve 22 also connects with air-introduced machine 24
It is logical, and the solenoid valve 23 being electrically connected with control system 1 is additionally provided on reversal valve 22, air-introduced machine entrance is provided on air-introduced machine 24
Thermometric instrument 25, automatic control unit 7 enter for receiving 25 testing result of air-introduced machine inlet temperature instrument according to air-introduced machine 24
Mouth temperature controls reversal valve 22 by solenoid valve 23 and acts.
Combustion air burner is arranged for two the present invention, and by two combustion air burners (181 He of the first combustion air burner
Second combustion air burner 182) it is connected to respectively with reversal valve 22, air-introduced machine inlet temperature instrument 25 is to 24 entrance of air-introduced machine when use
Temperature (i.e. 22 outlet temperature of reversal valve) carries out real-time measurement, when temperature is greater than 200 DEG C (100~300 DEG C of any settings), control
System 1 processed control solenoid valve 23 act so that 22 forced commutation of reversal valve (such as originally AB to, change into CD to；Originally in CD
To, change into AB to), can effectively protect reversal valve 22 and air-introduced machine 24 in this way, avoid flue-gas temperature height from burning and reversal valve 22 and draw
Blower 24.
As a kind of specific embodiment of heat-storage type burner combustion control device provided by the invention, Fig. 2 is please referred to
And Fig. 3, reversal valve 22 be arranged on the ground, and reversal valve 22 by metal hose 26 respectively with the first combustion air burner 181 and
The connection of second combustion air burner 182.
The present invention changes conventional rotary type regenerative burner, and reversal valve 22 and the setting of combustion air burner 18 is same in burner
The natural mode in region, it is innovative that reversal valve 22 is arranged on ground, so that reversal valve 22 and air-introduced machine 24 and heat source
It separates, effectively reduces the phenomenon that reversal valve 22 and 24 long-time of air-introduced machine are contacted with heat source, be easily damaged in use process
Occur.Wherein, reversal valve 22 is connected by metal hose 26 with the first combustion air burner 181 and the second combustion air burner 182 respectively
It connects, ensure that the first combustion air burner 181 and the second combustion air burner 182 not will receive with the normal overturning of burner lid and change
Adverse effect to 22 position change of valve.
As a kind of specific embodiment of heat-storage type burner combustion control device provided by the invention, Fig. 2 is please referred to
And Fig. 3, metal hose 26 pass through steel pipe 27 and reversal valve 22, the first combustion air burner 181 or the second combustion air burner 182 respectively
Connection.By the place for needing to bend using metal hose 26 when installation, other connecting tubes then use the stronger steel pipe of rigidity
27, this positioning ensures that the regularity of equipment overall structure, while also ensuring that the first combustion air burner 181 and second is combustion-supporting
Wind burner 182 not will receive the adverse effect of 22 position change of reversal valve with the normal overturning of burner lid.
Heat-storage type burner is recuperative heater or heat accumulating type Ladle-casting apparatus in the present embodiment.
The present invention also provides a kind of heat-storage type burner method for controlling combustion, referring to Fig. 4, the following steps are included:
1. automatic control unit 7 controls reversal valve 22 and commutates
When reversal valve 22 is in AB, combustion fan makes combustion air along combustion-supporting air piping 20, is entered by the E of reversal valve 22
Mouth, pipeline FG, reaches the first combustion air burner 181 at the direction EF of reversal valve 22；With the coal gas at coal gas burner 19 in burner
Interior formation burning.
Hot fume in burner along the second combustion air burner 182, pipeline IH, the direction HJ of reversal valve 22, pipeline JK,
Air-introduced machine 24, pipeline LM, chimney, are discharged into atmosphere.
When reversal valve 22 is in CD, combustion fan makes combustion air along combustion-supporting air piping 20, is entered by the E of reversal valve 22
Mouth, pipeline HI, reaches the second combustion air burner 182 at the direction EH of reversal valve 22；With the coal gas at coal gas burner 19 in burner
Interior formation burning.
Hot fume in burner along the first combustion air burner 181, pipeline GH, the direction FJ of reversal valve 22, pipeline JK,
Air-introduced machine 24, pipeline LM, chimney, are discharged into atmosphere.
The air-introduced machine inlet temperature instrument 25 installed on JK pipeline measures 22 outlet temperature of reversal valve, when temperature is greater than
At 200 DEG C (100~300 DEG C any setting), reversal valve 22 carry out forced commutation (such as originally AB to, change into CD to；Originally
CD to, change into AB to), in this way for protecting reversal valve 22 and air-introduced machine 24, flue-gas temperature height is avoided to burn 22 He of reversal valve
Air-introduced machine 24.
By automatic control unit 7, to control solenoid valve 23, and then control reversal valve 22 and act, the commutation cycle be (0~
300S) any setting.
2. automatic control unit 7 controls coal gas fast cut valve 16
The gas pressure instrument 11 and combustion air pressure gauge 13 being mounted on gas piping 21 and combustion-supporting air piping 20 are used
In detection gas pressure and combustion-supporting wind pressure.For open burner, when gas pressure is lower than 2KPa, coal gas fast cut valve 16
Movement cutting coal gas.For closed burner, when gas pressure is lower than 2KPa or combustion-supporting wind pressure is lower than 2KPa, coal gas is fast
Cut the movement cutting coal gas of valve 16.
3. air-fuel ratio computing module 8 obtains air-fuel ratio
Air-fuel ratio computing module 8 is for obtaining air-fuel ratio.Air-fuel ratio computing module 8 obtain gas composition analysis meter 5 or
The detected value of gas calorific value apparatus 6, while operator is by artificial experience value typing air-fuel ratio computing module 8, air-fuel ratio computing module 8
The air-fuel ratio obtained in accordance with the following methods:
1, pass through 6 detection data theoretical air-fuel ratio of fuel gas caloric value determination apparatus
Practical coal in the stove measured according to the corresponding relationship of the calorific value of gas and air-fuel ratio prestored and gas calorific value apparatus
Gas calorific value determines the actual air-fuel ratio in the stove；
Specifically, range of the kinds of gas according to calorific value of gas, is divided into blast furnace gas, coal gas of converter, mixed gas and coke
Producer gas, control system 1 calculate the air-fuel ratio of various coal gas according to calorific value of gas numerical value, test corresponding to the various coal gas of acquisition
Air-fuel ratio β n it is as shown in table 1:
Air-fuel ratio β n corresponding to the various coal gas of table 1
In table: β 0--- chemically correct fuel；β n--- actual air-fuel ratio；Q--- calorific value of gas, kcal/m3。
1 content of table is stored in control system 1, according to the real-time calorific value of gas numerical value that gas calorific value apparatus 6 measures, foundation
Thermal value range, control system 1 automatically select kinds of gas and air-fuel ratio calculation formula, calculate the practical sky of kiln burning automatically
Combustion is than β n.According to real-time calorific value of gas numerical classification, different kindss of gas corresponds to different actual air-fuel ratio calculation formula, has
Conducive to actual air-fuel ratio is accurately determined, accurate guarantee is provided for system regulation.
2, pass through 5 detection data theoretical air-fuel ratio of gas composition analysis meter
A. the oxygen content that flue measure of oxygen content device measures is converted into coefficient of excess air
The flue gas oxygen content that flue is obtained by flue measure of oxygen content device calculates coefficient of excess air using following formula:
μ=21/ (21-O2)=Ln/L0
In formula: μ --- coefficient of excess air, generally 1.05~1.25；O2--- oxygen content in flue gas, %；21——
Oxygen content in air；Ln --- burning 1m3The amount of actual air for combustion of coal gas of converter, m3；L0 --- burning 1m3The theory of coal gas of converter
Air capacity, m3。
B. burning computational chart is determined, as shown in table 2.
The burning computational chart of table 2
C. burn 1m3The theoretical air requirement L0 of coal gas of converter are as follows:
D. burn 1m3The amount of actual air for combustion Ln of coal gas of converter are as follows:
E. chemically correct fuel β 0=L0/1=L0, actual air-fuel ratio β n=Ln/1=L0 × μ are obtained.
The actual air-fuel ratio β n of this step, when gas composition analytical unit and flue measure of oxygen content device break down,
Using display device, operative employee inputs experience air-fuel ratio initial value, does not influence air-fuel ratio meter according to the manual operating experience for burning furnace
It calculates.
4. automatic control unit 7 controls chamber temperature
Automatic control unit 7 controls chamber temperature, is individually controlled using coal gas control loop and combustion air control loop.
A. coal gas control loop
A. given value SP (0~1600 DEG C) of the chamber temperature as PID regulator is set according to production requirement.
B. the output of chamber temperature instrument 2 is used as measured temperature PV (0~1600 DEG C).
C. deviation △ e=PV-SP, as the input of PID regulator, the output control of PID regulator after PID arithmetic are calculated
Gas regulator valve processed position FV1 (0~100%), and then the size of the measurement of gas flow value FT1 by temperature and pressure compensation is controlled,
It adjusts the flame size of burner in burner, and then controls chamber temperature, finally chamber temperature is controlled set in temperature
In definite value.
B. combustion air control loop
Air-fuel ratio computing module 8 obtains air-fuel ratio β n, air-fuel ratio * gas regulator valve position=β n*FV1 (0~100%),
As the given value of combustion air regulating valve valve position FV2, make FV2=β n*FV1 (0~100%), when the value of β n*FV1 is more than 100%
When, FV2=100% is taken, changes combustion air regulating valve valve position FV2 in the range of 0~100%, and then controls and passes through temperature and pressure
The size of the combustion air flow measurements FT2 of compensation, is adjusted combustion-supporting wind flow and gas flow by the relationship of air-fuel ratio,
And then control chamber temperature according to optimal air-fuel ratio, it realizes the best combustion of burner, reaches gas saving
Purpose.
When reversal valve 22 is commutated, in order to overcome commutation moment, combustion-supporting wind flow be 0 the case where, to combustion-supporting distinguished and admirable
Amount is handled, processing method: the commutation of reversal valve 22 (for 0), keeps combustion-supporting wind flow=change forward before signal arrives in place
Combustion-supporting wind flow, it is combustion-supporting distinguished and admirable after making combustion-supporting wind flow=commutation (for 1) after signal arrives the commutation of reversal valve 22 in place
Amount avoids the influence to commutate to control system.
Heat-storage type burner is for making steel ladle baking facility Combustion System.
Certain steel mill's packet roaster, 0~1000Nm of gas flow3/ h, combustion-supporting 0~2200Nm of wind flow3/ h, gas piping
DN150, combustion-supporting air piping DN200, mixed gas calorific value Q=2200kcal/m3, temperature control is at 900 DEG C, method for controlling combustion
It is as follows:
A. coal gas control loop
A. SP=900 DEG C of given value of chamber temperature as PID regulator is set according to production requirement.
B. the output of chamber temperature instrument 2 is used as measured temperature PV (0~1600 DEG C).
C. deviation △ e=PV-SP, as the input of PID regulator, the output control of PID regulator after PID arithmetic are calculated
Gas regulator valve processed position FV1 is fluctuated in the range of 20~30%, and then controls the measurement of gas flow for passing through temperature and pressure compensation
Value FT1 is in 750~800Nm3It is fluctuated in the range of/h.Pid parameter is proportional band P=0.22, time of integration Ti=3.1min.
B. combustion air control loop
The method that air-fuel ratio computing module 8 is introduced according to application publication number CN107238100A, according to obtaining air-fuel ratio β
N=1.141Q/1000=1.141*2200/1000=2.51.Air-fuel ratio * gas regulator valve position=β n*FV1=2.51*
(20%~30%)=50.2~75.3% make FV2=β n*FV1=as the given value of combustion air regulating valve valve position FV2
Change in the range of 50.2~75.3%, and then control by the combustion air flow measurements FT2 of temperature and pressure compensation 1800~
2000Nm3It is fluctuated in the range of/h, temperature controls in the range of 900 ± 10 DEG C, realizes the best combustion of burner, reaches section
The about purpose of coal gas meets the needs of technique production.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. heat-storage type burner combustion control device, it is characterised in that: including the combustion chamber being electrically connected respectively with control system (1)
Thermometric instrument (2), gas regulator (3) and combustion air regulating valve (4)；
It further include the gas composition analysis meter (5) and/or gas calorific value apparatus (6) being electrically connected respectively with the control system (1)；
The control system (1) includes automatic control unit (7), air-fuel ratio computing module (8) and PID regulator；The PID tune
Section device is for receiving the combustion chamber actual temperature that the chamber temperature instrument (2) detects, according to the practical temperature in the combustion chamber
Degree and combustion chamber preset temperature control gas regulator (3) the valve position；The air-fuel ratio computing module (8) is described for receiving
The detection data of gas composition analysis meter (5) or the gas calorific value apparatus (6), calculates according to gas composition or calorific value of gas
Air-fuel ratio out, the automatic control unit (7) are combustion-supporting according to the air-fuel ratio and the gas regulator (3) control of valve position
Wind regulating valve (4) valve position.
2. heat-storage type burner combustion control device as described in claim 1, it is characterised in that: the control system (1) is also
Respectively with gas temperature instrument (10), gas pressure instrument (11), gas flow instrument (12), combustion air pressure gauge (13),
Combustion air flow instrument (14), combustion air thermometric instrument (15) and coal gas fast cut valve (16) electrical connection.
3. heat-storage type burner combustion control device as claimed in claim 1 or 2, it is characterised in that: the control system (1)
For PLC control system or DCS control system.
4. heat-storage type burner, it is characterised in that: burn including heat-storage type burner described in shell (17) and Claims 2 or 3
Control device, the top or side of the shell (17) are provided with combustion air burner (18), coal gas burner (19) and the burning
Room temperature instrument (2), the combustion air burner (18) are connected to combustion-supporting air piping (20), the coal gas burner (19) and gas pipe
Road (21) connection, the combustion air thermometric instrument (15), the combustion air regulating valve (4), the combustion air flow instrument (14)
It is arranged on the combustion-supporting air piping (20) with the combustion air pressure gauge (13), it is the gas temperature instrument (10), described
Coal gas fast cut valve (16), the gas regulator (3), the gas flow instrument (12) and the gas pressure instrument (11) are set
It sets on the gas piping (21), the gas calorific value apparatus (6) and/or the gas composition analysis meter (5) are also disposed at
On the gas piping (21).
5. heat-storage type burner as claimed in claim 4, it is characterised in that: the combustion air burner (18) includes first combustion-supporting
Wind burner (181) and the second combustion air burner (182), the first combustion air burner (181) and the second combustion air burner
(182) be connected to the combustion-supporting air piping (20) by reversal valve (22) respectively, the reversal valve (22) also with air-introduced machine (24)
Connection, and the solenoid valve (23) being electrically connected with the control system (1), the air-introduced machine are additionally provided on the reversal valve (22)
(24) air-introduced machine inlet temperature instrument (25) is provided on, the automatic control unit (7) is for receiving the air-introduced machine entrance
Thermometric instrument (25) testing result, and the reversal valve is controlled by the solenoid valve (23) according to air-introduced machine (24) inlet temperature
(22) it acts.
6. heat-storage type burner as claimed in claim 5, it is characterised in that: the reversal valve (22) is arranged on the ground, and
The reversal valve (22) is burnt with the first combustion air burner (181) and second combustion air respectively by metal hose (26)
Mouth (182) connection.
7. heat-storage type burner as claimed in claim 6, it is characterised in that: the metal hose (26) passes through steel pipe respectively
(27) it is connect with the reversal valve (22), the first combustion air burner (181) or the second combustion air burner (182).
8. heat-storage type burner method for controlling combustion, which comprises the following steps:
Given value of the combustion chamber preset temperature as PID regulator is set, combustion chamber measured by chamber temperature instrument (2) is real
Border temperature is as measured temperature；
Measured temperature and deviation from the index value are calculated, as the input data of the PID regulator, according to the PID regulator
Operation result controls gas regulator (3) valve position；
The detection data for receiving the gas composition analysis meter (5) or the gas calorific value apparatus (6), according to the coal gas prestored at
Point or calorific value of gas and the corresponding relationship of air-fuel ratio air-fuel ratio is calculated；
According to combustion air regulating valve (4) valve position described in the air-fuel ratio and the gas regulator (3) control of valve position.
9. heat-storage type burner method for controlling combustion as claimed in claim 8, which is characterized in that further comprising the steps of:
Reversal valve (22) movement is controlled according to air-introduced machine inlet temperature instrument (25) measurement result, when the reversal valve (22) export
When temperature is greater than preset value, the reversal valve (22) commutation is controlled；
The coal gas is controlled according to the gas pressure instrument (11) or combustion air pressure gauge (13) testing result to cut fastly
Valve events, when gas pressure is lower than preset value lower than preset value or combustion air, coal gas fast cut valve (16) the movement cutting coal
Gas.
10. heat-storage type burner method for controlling combustion as claimed in claim 8 or 9, it is characterised in that: described according to the sky
Combustion than being according to equation with step institute in combustion air regulating valve (4) valve position described in the gas regulator (3) control of valve position
FV2=β n*FV1
Wherein, β n is air-fuel ratio, and FV1 is gas regulator (3) valve position, and FV2 is combustion air regulating valve (4) valve position；
And when the value of β n*FV1 is more than 100%, FV2=100% is taken.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811154405.5A CN109282283A (en) | 2018-09-30 | 2018-09-30 | Heat-storage type burner combustion control device, control method and heat-storage type burner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811154405.5A CN109282283A (en) | 2018-09-30 | 2018-09-30 | Heat-storage type burner combustion control device, control method and heat-storage type burner |
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| Publication Number | Publication Date |
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| CN109282283A true CN109282283A (en) | 2019-01-29 |
Family
ID=65182528
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811154405.5A Pending CN109282283A (en) | 2018-09-30 | 2018-09-30 | Heat-storage type burner combustion control device, control method and heat-storage type burner |
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| CN111076193A (en) * | 2019-12-17 | 2020-04-28 | 浙江天地环保科技有限公司 | Automatic adjusting and controlling system and method for temperature of combustion chamber of heat accumulating type thermal oxidation furnace |
| CN113513920A (en) * | 2021-07-14 | 2021-10-19 | 马鞍山钢铁股份有限公司 | Sintering ignition furnace capable of balancing ignition quality and control method thereof |
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| CN113513920A (en) * | 2021-07-14 | 2021-10-19 | 马鞍山钢铁股份有限公司 | Sintering ignition furnace capable of balancing ignition quality and control method thereof |
| CN113513920B (en) * | 2021-07-14 | 2022-12-16 | 马鞍山钢铁股份有限公司 | Sintering ignition furnace capable of balancing ignition quality and control method thereof |
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