CN109519962A - Boiler low nitrogen burning air quantity adjustment equipment - Google Patents
Boiler low nitrogen burning air quantity adjustment equipment Download PDFInfo
- Publication number
- CN109519962A CN109519962A CN201811626154.6A CN201811626154A CN109519962A CN 109519962 A CN109519962 A CN 109519962A CN 201811626154 A CN201811626154 A CN 201811626154A CN 109519962 A CN109519962 A CN 109519962A
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- Prior art keywords
- boiler
- low nitrogen
- temperature
- air door
- air
- Prior art date
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 216
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 108
- 238000001514 detection method Methods 0.000 claims abstract description 38
- 239000003245 coal Substances 0.000 claims abstract description 9
- 239000000284 extract Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 230000008901 benefit Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 238000005336 cracking Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 6
- 239000001301 oxygen Substances 0.000 abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 abstract description 6
- 239000000779 smoke Substances 0.000 abstract description 5
- 230000036651 mood Effects 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/06—Regulating air supply or draught by conjoint operation of two or more valves or dampers
-
- 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
- F23N5/14—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermo-sensitive resistors
- F23N5/146—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermo-sensitive resistors using electrical or electromechanical means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The present invention relates to a kind of boiler low nitrogen burning air quantity adjustment equipments, it repeatedly matches adjusting by carrying out to multiple low nitrogen air doors with multiple air doors, the air quantity and fresh air matching amount for being passed through low nitrogen air door reach balance, both: oxygen content control is between 14% to 15%, it include: to be connected at low nitrogen blower and the new fan outlet to convey, to control the air door pipeline of low nitrogen wind Yu fresh air output quantity；The boiler of the air door pipeline output end is set, and the boiler internal is equipped with fire coal, generates heat to receive low nitrogen wind and fresh air mixing wind and burn；It is connected with the low nitrogen wind with fresh air air door pipeline, to detect and control the control unit of low nitrogen wind and fresh air mixing wind output quantity in air door pipeline.The present invention can complete the control to throttle opening in general mood pipeline step by step, to be gradually completing the accurate matching to coal-air ratio in boiler, reach the miscellaneous oxygen control of smoke evacuation within 9% by carrying out repeated detection and adjusting to air door.
Description
Technical field
The present invention relates to heat supply temperature self-regulation technical fields more particularly to a kind of adjusting of boiler low nitrogen burning air quantity to set
It is standby.
Background technique
The optimum condition of boiler combustion is the accurate match of coal-air ratio, and in the matching process, boiler uses a new blower
Air-supply, blasts multiple air doors, due to air door design and installation position many reasons, causes throttle opening ratio the same, but every
The fresh air volume deviation that one air door blasts boiler is very big, and traditional industries fireman uses throttle opening control method, does not accomplish essence
Quasi- control fresh air volume, causes furnace burning uneven, and some grate level burnings are clean, and (fresh air is greater than fire coal and needs oxygen
Amount), some grate level burnings are insufficient (fresh air is less than fire coal and needs oxygen amount).It causes under energy waste and equipment operating efficiency
Drop.
China Patent Publication No.: CN206545939U discloses a kind of boiler combustion system, comprising: boiler；For to pot
Air duct of furnace offer First air；For providing the secondary air duct of Secondary Air to boiler；For providing pressure cold wind to boiler
Cold wind circuit；The smoke-exhaust pipeline being connected with boiler flue gas outlet；It is arranged between an air duct, the second air duct and smoke-exhaust pipeline
Flue gas circuit；Flue gas circuit includes: smoke backflow section, fresh air section and mixed wind section, wherein the first end of smoke backflow section, cigarette
The first end of gas reflux section and the docking of mixed wind section first end, between the second end and electric dust removing system and chimney of smoke backflow section
Smoke-exhaust pipeline is connected, and the second end of fresh air section mixes the second end of wind section and the primary side of boiler combustion system for introducing fresh air
Air duct is connected with secondary side air duct；The air-introduced machine of the second end of smoke backflow section is set；The second end of fresh air section is set
Pressure fan.It can be seen that the system has the following problems:
First, the system be used only two flues, can not be comprehensive to boiler fill into fresh air, cause in boiler
Fresh air departure is big, and the fire coal in boiler is unable to fully burn.
Second, it is not transported to adjust the device of pipeline internal air stream amount in boiler in the flue of the system
Due to that can not control air mass flow in pipeline when row, accurate match can not be carried out so as to cause coal-air ratio in boiler.
Summary of the invention
For this purpose, the present invention provides a kind of boiler low nitrogen burning air quantity adjustment equipment, to overcome low nitrogen wind in the prior art
Matching is matched with fresh air, and mixing wind oxygen amount reaches between 14-16%.
To achieve the above object, the present invention provides a kind of boiler low nitrogen burning air quantity adjustment equipment, by multiple low
Nitrogen air door is repeatedly adjusted, and the low nitrogen for being passed through multiple air doors reaches balance with fresh air volume and matches, and both: oxygen content control exists
Between 14% to 15%, comprising:
To convey low nitrogen blower, the low nitrogen blower can change the output quantity of low nitrogen wind according to watt level；
It is connected at the low nitrogen fan outlet, to control the air door pipeline of low nitrogen wind output quantity；
The boiler of the low nitrogen air door pipeline output end is set, and the boiler internal is equipped with fire coal, to receive low nitrogen
Mixing wind simultaneously burns and generates heat；
It is connected with the low nitrogen air door pipeline, to detect and control the control of low nitrogen wind output quantity in low nitrogen air door pipeline
Unit.
Further, the conveyance conduit that low nitrogen wind is mutually in parallel with fresh air is equipped in the low nitrogen air door pipeline.
Further, air door is equipped in the low nitrogen air door pipeline in each bypass line, by the aperture for adjusting each air door
Low nitrogen wind and new wind ratio are adjusted to accurate proportion.
Further, each low nitrogen air door is placed in 50% aperture before the equipment runs, to reserve each low nitrogen air door
Adjusting allowance.
Further, the boiler selects cylindrical tube, and its heating process includes:
(1) first stage
Step a1: first stage temperature to be achieved is needed to be set as t in boiler1, it is up to the first stage temperature t1It needs
Time be set as T1, due to selecting resistance in the present invention and being heated using electrically heated method to boiler, then in this stage
In resistance need to be selected；
W will be set as to heat required for first stage temperature is heated in boiler1, then W1It can be acquired by formula (1):
W1=cm Δ t1 (1)
Wherein c is air concentration in boiler, and m is quality coal-fired in boiler, Δ t1For in boiler from initial temperature t0Heating
To first stage temperature t1When temperature difference；
Step b1: W is calculated1Afterwards, formula (2) are carried it into, manufacture first stage heat W is found out1Required first stage function
Rate P1:
W1=η P1T1 (2)
Wherein η is the heat absorption efficiency of air in boiler；
Step c1: first stage power P is found out1Afterwards, the voltage U used according to the resistance is found out described using formula (3)
The specific resistance value R of resistance:
Step d1: the resistance value R can be determined by formula (4):
R=ρ ls (4)
Wherein ρ is resistivity, and specific value is related to the material of resistance, and l is the length of resistance wire, and s is resistance wire
Sectional area；
Step e1: resistance wire interface radius is set as r, then resistance wire sectional area s=π r2, formula (4) are carried it at this time
:
R=ρ l π r2(5)
The height of boiler is set as H, diameter is set as d, formula (6) can be obtained at this time:
WhereinIt is wrapped in the circle number on cracking reaction kettle for resistance wire, the length l of resistance wire can be found out by above formula
With section radius r；
Step f1: after finding out l and r, finding out electricalresistivityρ according to required resistance value R using formula (5), and selects corresponding resistance
The material of rate ρ enables resistance wire counterincision solution reaction kettle be heated after being installed as resistance wire using specified voltage value U,
Waste oil after pretreatment can be made within a specified time to be heated to assigned temperature；
(2) second stage
After the completion of the first stage, control system will control the heating temperature of resistance so that the temperature of the boiler maintains
In a certain range；
Due in second stage, the normal temperature t of boiler2With second stage temperature t1It is identical, therefore, in second stage
Described in control system it is not necessary that parameter is adjusted, root identical as the heat in boiler with the heat that this issues resistance wire
According to heating power law of conservation, the heat of the two will not occur to shift or transmit, so that the temperature in boiler maintains within the specified range.
Further, described control unit includes:
Timing module is connected with the boiler, to record the runing time of boiler, in boiler operatiopn, and the meter
When module the runing time of boiler can be recorded, upon recording between reach time rating after, timing module can stop timing,
Time and reclocking are reset after the completion of control unit adjusts the low nitrogen air door pipeline；
Detection module is connected with the low nitrogen air door pipeline, to detect each low nitrogen air door in low nitrogen air door pipeline
Inlet temperature, in equipment operation, detection module can carry out the temperature at low nitrogen air door in the low nitrogen air door pipeline
Detection；
Computing module is connected with the detection module, the temperature that detection module measures is counted and be calculated,
After the detection module is to the inlet temperature detection of low nitrogen air door, the temperature value measured is delivered to the computing module, it is described
Computing module can establish table to data and find out the average value in data, and it is each to find out that average value and each temperature data are made difference
The temperature difference of low nitrogen air door, and each temperature difference is found out into temperature error percentage compared with mean temperature, it is extracted according to percentage error
The high temperature group and low temperature group of specified quantity；
Control module is connected, to control new power of fan and air door respectively with the low nitrogen blower and air door pipeline
The aperture of air door inside pipeline, after the computing module extracts specified quantity high temperature group and low temperature group, can by high temperature group data and
Low temperature group data are delivered to the control module, and the control module can be according to the temperature error percentage in each data to fresh air
The aperture of machine power and corresponding air door is adjusted.
Further, the detection module is circumscribed with temperature detector, and the temperature detector is arranged in each air door
Inlet, to detect each air door inlet temperature and the temperature value measured is delivered to the detection module.
Further, described control unit at least carries out four detections to the low nitrogen air door pipeline and adjusts, comprising: thick
Tune, accurate adjustment, quasi- reconcile mend tune, to guarantee that mixing wind flow is identical in low each branch of nitrogen air door pipeline.
Further, described control unit is when carrying out coarse adjustment, high temperature group and low temperature group number that the computing module extracts
Amount is 30% in total amount of data；
For described control unit when carrying out accurate adjustment, the high temperature group and low temperature group quantity that the computing module extracts are data
20% in total amount；
Described control unit is carrying out quasi- timing, and the high temperature group and low temperature group quantity that the computing module extracts are data
10% in total amount；
Described control unit is carrying out benefit timing, and the high temperature group and low temperature group quantity that the computing module extracts are 1.
Compared with prior art, the beneficial effects of the present invention are the present invention is more by carrying out to low nitrogen blower and air door
Secondary detection and adjusting can complete the control to throttle opening in low nitrogen general mood pipeline, step by step to be gradually completing to fresh air
With accurate matching.
In particular, the more conveyance conduits being mutually in parallel are equipped in the low nitrogen air door pipeline, by the way that conveyance conduit is uniform
Be connected with boiler casing, mixed gas can be made to enter boiler from multiple directions, to guarantee in boiler containing sufficient mixed
Close wind.
Further, each low nitrogen air door before the equipment runs by aperture be arranged 50%, in this way, to air door into
When row is adjusted, it can guarantee that each air door has sufficient adjusting allowance, not appear in throttle opening in adjustment process and reach capacity
So as to cause that can not continue growing or reduce aperture, the degree of regulation of the equipment is improved.
Further, the timing module in described control unit can carry out timing to the runing time of the boiler, pass through
Runing time is constrained, can be derived that the statistical data of relative equality, to further increase the adjusting essence of the equipment
Degree.
In particular, its external temperature detector is separately positioned on the inlet of each air door by the detection module, by right
The temperature of low nitrogen air door inlet is checked obtaining each low nitrogen air door institute, whether air inflow is sufficient in the duct, can be to each
Mixed gas flow in pipeline is carried out accurate and is quickly detected, and improves the detection accuracy of the equipment.
In particular, the computing module can carry out the data detected to calculate and count calculated result, by right
The calculating of data and statistics can fast and accurately find the excessively high and too low air door of temperature, further improve the equipment
Detection efficiency.
Further, the equipment can gradually reduce the air door quantity of adjusting when repeatedly being adjusted, easy to operate,
And it can guarantee the temperature in stable regulation boiler.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of boiler low nitrogen burning air quantity adjustment equipment of the present invention.
Specific embodiment
In order to which objects and advantages of the present invention are more clearly understood, the present invention is further retouched below with reference to embodiment
It states；It should be appreciated that specific embodiment described herein is used only for explaining the present invention, it is not intended to limit the present invention.
Below in conjunction with attached drawing, the forgoing and additional technical features and advantages are described in more detail.
The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this
A little embodiments are used only for explaining technical principle of the invention, are not limiting the scope of the invention.
It should be noted that in the description of the present invention, the instruction such as term " on ", "lower", "left", "right", "inner", "outside"
Direction or the term of positional relationship be direction based on the figure or positional relationship, this is intended merely to facilitate description, and
It is not that indication or suggestion described device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.
In addition it is also necessary to explanation, in the description of the present invention unless specifically defined or limited otherwise, term " peace
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.To those skilled in the art, it can understand that above-mentioned term exists as the case may be
Concrete meaning in the present invention.
Refering to Figure 1, it is the structural schematic diagram of boiler low nitrogen burning air quantity adjustment equipment of the present invention, including
New blower 1, air door pipeline 2, boiler 3 and control unit 4；The wherein entrance of the air door pipeline 2 and the low nitrogen blower 1
Air outlet is connected, the mixing wind exported to convey the low nitrogen blower 1；The outlet phase of the boiler 3 and the air door pipeline 2
Even, to receive the low nitrogen mixing wind of the air door pipeline, make the fired coal combustion inside boiler 3 and generate heat；It is described
Control unit 4 is connected with the air door pipeline 2 and boiler 3 respectively, to detect the operation conditions of the equipment and to the wind
The flow of low nitrogen mixing wind is adjusted in door pipeline 2.When equipment operation, the low nitrogen blower 1 starts to blast mixing
Wind, and the low nitrogen air door pipeline 2 is output this to, mixing wind is delivered to the boiler 3, institute by the low nitrogen air door pipeline 2
Stating boiler 3 can be using the fire coal inside mixing wind burning boiler 3 to generate heat, in equipment operation, 4 meeting of described control unit
The runing time of boiler 3 is recorded, and make control unit 4 boiler 3 run specified time after to air door pipeline 2 inside
Temperature is detected, after testing and calculation after, control unit 4 conveys low nitrogen mixing wind to air door pipeline 2 according to calculated result
Flow is adjusted, so that the coal-air ratio in boiler 3 reaches specified proportion.It is understood that the equipment cannot be only used for
Air mass flow is adjusted, can also be used for that the flow of other gases is adjusted, this embodiment is not specifically limited, as long as
Its specified working condition can be reached by meeting the boiler low nitrogen burning air quantity adjustment equipment.
Please continue to refer to shown in Fig. 1, low nitrogen blower 1 of the present invention is connected with the low nitrogen air door pipeline 2, to low
Nitrogen air door pipeline 2 conveys mixing wind.When the equipment brings into operation, the low nitrogen blower 1 starts to start, will be by partial fume
It proportionally sucks and exports into the air door pipeline 2.It is understood that the type of the low nitrogen blower 1 can be for certainly
The low nitrogen blower of balanced type, the low nitrogen blower of wet control formula, the low nitrogen blower of bidirectional flow heat reclamation type or other kinds of low nitrogen blower, as long as
Gaseous mixture can be delivered in the air door pipeline 2 at runtime by meeting the new blower 1.
Please continue to refer to shown in Fig. 1, the import of low nitrogen air door pipeline 2 of the present invention is connected with the new blower 1, to
The mixing wind that the low nitrogen blower 1 exports is conveyed, the outlet of the low nitrogen air door pipeline 2 is the more pipelines being mutually in parallel,
Be uniformly arranged on it is on the side wall of the boiler 3 and coupled, to mixing wind to be delivered to inside boiler 3；In air door
It is equipped with air door 21 inside each branch of pipeline 2, to control mixed gas flow in each branch by opening size.In the low nitrogen
When air door pipeline 2 conveys low nitrogen mixing wind, the air door 21 is respectively provided with 50% aperture, and described control unit 4 can be according to boiler 3
The aperture of internal combustion burning of coal situation damper 21, to reach the accurate matching to coal-air ratio in boiler 3.
Please continue to refer to shown in Fig. 1, control unit 4 of the present invention is connected with the air door pipeline 2 and boiler 3 respectively,
To the mixing wind flow of each branch in damper pipeline 2, including timing module 41, detection module 42,43 and of computing module
Control module 44；Wherein the timing module 41 is connected with the boiler 3, to record the runing time of boiler 3, the detection
Module 42 is connected with each air door 21 respectively, to detect the inlet temperature of each air door 21；The computing module 43 with
The detection module 42 is connected, and the temperature value to measure to the detection module 42 calculates；The control module 44 is divided
It is not connected with each air door 21, is opened to adjust it according to the specified air door 21 of the calculated result of the computing module 43 control
Degree.
When equipment operation, the runing time of boiler 3 described in the meeting of timing module 41 start recording, when what is passed by one's way
After runing time reaches time rating, the detection module 42 starts the mixing wind to 21 inlet of air door each in air door pipeline 2
Temperature is detected, and the data measured are delivered to the meter of the clearing of timing module 41 simultaneously of computing module 43 by detection module 42 after detection
When, the computing module 43 can be counted and be calculated to the data of conveying, choose the excessively high and too low wind of temperature after computation
Door 21, and control signal is sent to control module 44, it controls it to specified air door 21, passes through opening for damper 21
The low nitrogen of its place branch of degree control mixes wind flow.
Specifically, the detection module 42 is circumscribed with temperature detector, the thermometer is separately positioned on each wind
The inlet of door 21, to measure the temperature of each 21 inlet of air door.When the detection module 42 is to 21 inlet temperature of air door
When measuring, the temperature detector starts to measure the inlet temperature of air door 21, and the data measured are conveyed
To the detection module 42.It is understood that this embodiment is not specifically limited for the type of the temperature detector, as long as full
The foot temperature detector can accurately detect each 21 inlet temperature of air door.
Specifically, the computing module 43 is connected with the detection module 42, to the number measured to detection module 42
According to being counted and being calculated, after the detection module 42 is to the inlet temperature detection of air door 21, the temperature value measured is delivered to
The computing module 43, the computing module 43 can establish table to data and find out the average value in data, by average value with
Each temperature data makees difference to find out the temperature difference of each air door 21, and each temperature difference is found out temperature error percentage compared with mean temperature
Than extracting the high temperature group and low temperature group of specified quantity according to percentage error.
Specifically, the control module 44 is connected with each air door 21, to control the specified adjusting of air door 21, it is opened
Degree is with the air mass flow of 21 place branch of damper, when the computing module 43 extracts the high temperature group and low temperature of specified quantity
After group, the control module 44 can be sent a control signal to, the control module 44 can control upon the reception of control signals to be referred to
Fixed air door 21 adjusts aperture, to guarantee the air mass flow of each branch in air door pipeline 2.
Embodiment 1
The present embodiment will use boiler low nitrogen burning air quantity adjustment equipment of the present invention and hollow to the air door pipeline 2
Throughput is adjusted, wherein being equipped with ten bypass lines in the air door pipeline 2, five settings are in 3 left side wall of boiler, and five
It is arranged in 3 right side wall of boiler.
Specifically, boiler described in the present embodiment selects cylindrical tube, and its heating process includes:
(1) first stage
Step a1: first stage temperature to be achieved is needed to be set as t in boiler1, it is up to the first stage temperature t1It needs
Time be set as T1, due to selecting resistance in the present invention and being heated using electrically heated method to boiler, then in this stage
In resistance need to be selected；
W will be set as to heat required for first stage temperature is heated in boiler1, then W1It can be acquired by formula (1):
W1=cm Δ t1(1)
Wherein c is air concentration in boiler, and m is quality coal-fired in boiler, Δ t1For in boiler from initial temperature t0Heating
To first stage temperature t1When temperature difference；
Step b1: W is calculated1Afterwards, formula (2) are carried it into, manufacture first stage heat W is found out1Required first stage function
Rate P1:
W1=η P1T1 (2)
Wherein η is the heat absorption efficiency of air in boiler；
Step c1: first stage power P is found out1Afterwards, the voltage U used according to the resistance is found out described using formula (3)
The specific resistance value R of resistance:
Step d1: the resistance value R can be determined by formula (4):
R=ρ ls (4)
Wherein ρ is resistivity, and specific value is related to the material of resistance, and l is the length of resistance wire, and s is resistance wire
Sectional area；
Step e1: resistance wire interface radius is set as r, then resistance wire sectional area s=π r2, formula (4) are carried it at this time
:
R=ρ l π r2 (5)
The height of boiler is set as H, diameter is set as d, formula (6) can be obtained at this time:
WhereinIt is wrapped in the circle number on cracking reaction kettle for resistance wire, the length l of resistance wire can be found out by above formula
With section radius r；
Step f1: after finding out l and r, finding out electricalresistivityρ according to required resistance value R using formula (5), and selects corresponding resistance
The material of rate ρ enables resistance wire counterincision solution reaction kettle be heated after being installed as resistance wire using specified voltage value U,
Waste oil after pretreatment can be made within a specified time to be heated to assigned temperature；
(2) second stage
After the completion of the first stage, control system will control the heating temperature of resistance so that the temperature of the boiler maintains
In a certain range；
Due in second stage, the normal temperature t of boiler2With second stage temperature t1It is identical, therefore, in second stage
Described in control system it is not necessary that parameter is adjusted, root identical as the heat in boiler with the heat that this issues resistance wire
According to heating power law of conservation, the heat of the two will not occur to shift or transmit, so that the temperature in boiler maintains within the specified range.
When adjusting beginning, the aperture of all air doors 21 is set as 50%, and carries out coarse adjustment, accurate adjustment, quasi- reconciliation respectively
It mends and adjusts, in which:
Coarse steps include: to measure the inlet temperature of each air door 21, and the temperature data of measurement is established electronic watch for the first time
Lattice seek temperature-averaging number；Subtracted each other with the temperature that each entrance measures with mean temperature, finds out each temperature difference；With each temperature difference and newly
Air door mean temperature compares, and seeks temperature error percentage, and margin of error is established three groups of data, and 30% 1 group of maximum temperature；It is minimum
It is 30% 1 group of temperature, 40% 1 group remaining；Then one group of maximum temperature is adjusted, turns 21 aperture of air door down according to error rate；It adjusts
One group of whole minimum temperature tunes up 21 aperture of air door according to error rate；Remaining one group does not adjust, and is adjusted by first time, allows pot
Furnace apparatus is run 30 minutes, after the completion of fresh air couples again according to adjustment ratio, re-measures each fresh air inlet temperature.
Fine tuning step includes: after the completion of adjusting for the first time, to measure each 21 inlet temperature of air door, establish electrical form for the second time
Input measurement temperature finds out inlet temperature average；Subtracted each other with the temperature that each 21 entrance of air door measures with mean temperature, asks each new
Air door temperature difference；With each new air door temperature difference compared with 21 mean temperature of air door, temperature error percentage is sought, margin of error is established
Three groups of data, 20% 1 group of maximum temperature；It is 20% 1 group of minimum temperature, 60% 1 group remaining；Then one group of maximum temperature is adjusted,
21 aperture of air door is turned down according to error rate；One group of minimum temperature of adjustment, tunes up 21 aperture of air door according to error rate；Residue one
Group does not adjust, and is adjusted by second, and boiler plant is allowed to run 30 minutes, after the completion of fresh air couples again according to adjustment ratio,
Each fresh air inlet temperature is measured again.
After the completion of quasi- pacing includes: second of adjustment suddenly, each 21 inlet temperature of air door is measured, establishes electrical form for the third time
Input measurement temperature finds out inlet temperature average；Subtracted each other with the temperature that each 21 entrance of air door measures with mean temperature, asks each new
Air door temperature difference；With each new air door temperature difference compared with 21 mean temperature of air door, temperature error percentage is sought, margin of error is established
Three groups of data, 10% 1 group of maximum temperature；It is 10% 1 group of minimum temperature, 80% 1 group remaining；Then one group of maximum temperature is adjusted,
21 aperture of air door is turned down according to error rate；One group of minimum temperature of adjustment, tunes up 21 aperture of air door according to error rate；Residue one
Group does not adjust, and is adjusted by third time, and boiler plant is allowed to run 30 minutes, after the completion of fresh air couples again according to adjustment ratio,
Each fresh air inlet temperature is measured again.
Mend pacing includes: after the completion of third time adjusts, to measure each 21 inlet temperature of air door, establish electrical form the 4th time suddenly
Input measurement temperature finds out inlet temperature average；Subtracted each other with the temperature that each 21 entrance of air door measures with mean temperature, asks each new
Air door temperature difference；With each new air door temperature difference compared with 21 mean temperature of air door, temperature error percentage is sought, margin of error is established
Three groups of data, maximum temperature one；It is minimum temperature one, one group remaining；Then maximum temperature air door 21 is adjusted, according to error ratio
Example turns 21 aperture of air door down；Minimum temperature air door 21 is adjusted, tunes up 21 aperture of air door according to error rate；Remaining one group uncomfortable
It is whole, so that the coal-air ratio in boiler 3 is reached specified proportion.
The parameter of the equipment each air door 21 after coarse adjustment is as shown in table 1:
Table 1
Method of adjustment: 16*30%=4.8 adjusts minimum number 4, most 5.
More than 55.5 degree air door 8, adjust 4.
Lower than 55.5 degree air door 5, adjust 4.
Remaining 8 air door automatic couplings, form new balance.
The parameter of the equipment each air door 21 after accurate adjustment is as shown in table 2:
Table 2
Method of adjustment: 16*20%=3.2 adjusts quantity 3.
More than 53.6 degree air door 8, adjust 3.
Lower than 53.6 degree air door 6, adjust 3.
Remaining 12 air door automatic couplings, form new balance.
The parameter of the equipment each air door 21 after quasi- adjust is as shown in table 3:
Table 3
Method of adjustment: 16*10%=1.6 adjusts quantity 2.
More than 52 degree air door 4, adjust 2.
Lower than 52 degree air door 7, adjust 1.
Remaining 13 air door automatic couplings, form new balance.
The parameter of the equipment each air door 21 after mending and adjusting is as shown in table 4:
Table 4
Method of adjustment:
More than 52 degree air door 1, adjust 1.
Lower than 52 degree air door 1, adjust 1.
Reach balance.
It can be obtained according to aforementioned four table, be adjusted rear air mass flow adjustment and be accurate to 2.8/1000ths, accurately reach again
5 times or so.
So far, it has been combined preferred embodiment shown in the drawings and describes technical solution of the present invention, still, this field
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific embodiments.Without departing from this
Under the premise of the principle of invention, those skilled in the art can make equivalent change or replacement to the relevant technologies feature, these
Technical solution after change or replacement will fall within the scope of protection of the present invention.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention；For those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of boiler low nitrogen burning air quantity adjustment equipment, which is characterized in that by multiple low nitrogen air doors and the progress of new blower
It repeatedly adjusts, the low nitrogen wind and fresh air volume and Coal-fired capacity for being passed through air door reach balance, comprising:
To convey low nitrogen wind and new blower, the low nitrogen wind and fresh air machine can change mixed gas according to watt level
Output quantity；
It is connected at the low new fan outlet of nitrogen blower, to control the air door pipeline of low nitrogen wind Yu fresh air output quantity；
The boiler of the low nitrogen air door pipeline output end is set, and the boiler internal is equipped with fire coal, to receive low nitrogen mixing
Wind simultaneously burns and generates heat；
It is connected with the low nitrogen air door pipeline, to detect and control the control unit of fresh air output quantity in low nitrogen air door pipeline.
2. boiler low nitrogen burning air quantity adjustment equipment according to claim 1, which is characterized in that every in the air door pipeline
A low nitrogen air door is equipped with the conveyance conduit being mutually in parallel.
3. boiler low nitrogen burning air quantity adjustment equipment according to claim 2, which is characterized in that the low nitrogen air door pipeline
In air door is equipped in each bypass line, by adjusting the aperture of each air door so that coal-air ratio is adjusted to accurate proportion.
4. boiler low nitrogen burning air quantity adjustment equipment according to claim 3, which is characterized in that each air door is in equipment
50% aperture is placed in front of operation, to reserve the adjusting allowance of each air door.
5. boiler low nitrogen burning air quantity adjustment equipment according to claim 1, which is characterized in that the boiler selects cylinder
Shape cylinder, and its heating process includes:
(1) first stage
Step a1: first stage temperature to be achieved is needed to be set as t in boiler1, it is up to the first stage temperature t1Need when
Between be set as T1, due to selecting resistance in the present invention and being heated using electrically heated method to boiler, then needed in this stage
Resistance is selected；
W will be set as to heat required for first stage temperature is heated in boiler1, then W1It can be acquired by formula (1):
W1=cm Δ t1 (1)
Wherein c is air concentration in boiler, and m is quality coal-fired in boiler, Δ t1For in boiler from initial temperature t0It is warming up to
One phase temperature t1When temperature difference；
Step b1: W is calculated1Afterwards, formula (2) are carried it into, manufacture first stage heat W is found out1Required first stage power
P1:
W1=η P1T1 (2)
Wherein η is the heat absorption efficiency of air in boiler；
Step c1: first stage power P is found out1Afterwards, the voltage U used according to the resistance finds out the resistance using formula (3)
Specific resistance value R:
Step d1: the resistance value R can be determined by formula (4):
R=ρ ls (4)
Wherein ρ is resistivity, and specific value is related to the material of resistance, and l is the length of resistance wire, and s is the section of resistance wire
Product；
Step e1: resistance wire interface radius is set as r, then resistance wire sectional area s=π r2, formula (4) are carried it at this time to be obtained:
R=ρ l π r2 (5)
The height of boiler is set as H, diameter is set as d, formula (6) can be obtained at this time:
WhereinIt is wrapped in the circle number on cracking reaction kettle for resistance wire, the length l of resistance wire can be found out by above formula and is cut
Radius surface r；
Step f1: after finding out l and r, finding out electricalresistivityρ according to required resistance value R using formula (5), and selects corresponding electricalresistivityρ's
Material enables resistance wire counterincision solution reaction kettle be heated, can make after being installed as resistance wire using specified voltage value U
Waste oil is within a specified time heated to assigned temperature after pretreatment；
(2) second stage
After the completion of the first stage, control system will control the heating temperature of resistance so that the temperature of the boiler maintains centainly
In range；
Due in second stage, the normal temperature t of boiler2With second stage temperature t1It is identical, therefore, the institute in second stage
Control system is stated it is not necessary that parameter is adjusted, keeps the heat of resistance wire sending identical as the heat in boiler with this, according to heat
Power law of conservation, the heat of the two will not occur to shift or transmit, so that the temperature in boiler maintains within the specified range.
6. boiler low nitrogen burning air quantity adjustment equipment according to claim 1, which is characterized in that described control unit packet
It includes:
Timing module is connected with the boiler, to record the runing time of boiler, in boiler operatiopn, and the timing mould
Block can record the runing time of boiler, upon recording between reach time rating after, timing module can stop timing, control
Unit processed resets time and reclocking after the completion of adjusting to the low nitrogen air door pipeline；
Detection module is connected with the low nitrogen air door pipeline, to detect the inlet temperature of each air door in low nitrogen air door pipeline,
In equipment operation, detection module can detect the temperature at low nitrogen air door in the air door pipeline；
Computing module is connected with the detection module, described the temperature that detection module measures is counted and be calculated
After detection module is to the inlet temperature detection of low nitrogen air door, the temperature value measured is delivered to the computing module, the calculating
Module can establish table to data and find out the average value in data, and average value and each temperature data are made difference to find out each low nitrogen
The temperature difference of air door, and each temperature difference is found out into temperature error percentage compared with mean temperature, it is extracted according to percentage error specified
The high temperature group and low temperature group of quantity；
Control module is connected, to control low nitrogen machine power and air door pipeline respectively with the low nitrogen blower and air door pipeline
The aperture of internal air door can be by high temperature group data and low temperature after the computing module extracts specified quantity high temperature group and low temperature group
Group data are delivered to the control module, and the control module can be according to the temperature error percentage in each data to low nitrogen blower
The aperture of power and corresponding low nitrogen air door is adjusted.
7. boiler low nitrogen burning air quantity adjustment equipment according to claim 6, which is characterized in that the detection module is external
There is temperature detector, the temperature detector is arranged in each low nitrogen air door inlet, to detect each air door inlet temperature
It spends and the temperature value measured is delivered to the detection module.
8. boiler low nitrogen burning air quantity adjustment equipment according to claim 6, which is characterized in that described control unit is to institute
It states air door pipeline at least to carry out four detections and adjust, comprising: coarse adjustment, accurate adjustment, the quasi- benefit that reconciles are adjusted, to guarantee each, air door pipeline
Air mass flow is identical in road.
9. boiler low nitrogen burning air quantity adjustment equipment according to claim 8, which is characterized in that described control unit into
When row coarse adjustment, high temperature group and low temperature group quantity that the computing module extracts are 30% in total amount of data；
For described control unit when carrying out coarse adjustment, the high temperature group and low temperature group quantity that the computing module extracts are total amount of data
In 20%；
For described control unit when carrying out coarse adjustment, the high temperature group and low temperature group quantity that the computing module extracts are total amount of data
In 10%；
For described control unit when carrying out coarse adjustment, the high temperature group and low temperature group quantity that the computing module extracts are 1.
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| CN201811626154.6A CN109519962B (en) | 2018-12-28 | 2018-12-28 | Low-nitrogen combustion air quantity adjusting equipment for boiler |
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|---|---|---|---|
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| CN206803215U (en) * | 2017-05-02 | 2017-12-26 | 浙江中力工具制造有限公司 | A kind of biomass fireplace that can automatically adjust intake |
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| CN210088914U (en) * | 2018-12-28 | 2020-02-18 | 启明星宇节能科技股份有限公司 | Boiler low-nitrogen combustion air quantity regulating equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5811319A (en) * | 1981-07-13 | 1983-01-22 | Kaneko Agricult Mach Co Ltd | Temperature controller in hot air generator |
| JPS5969612A (en) * | 1982-10-14 | 1984-04-19 | Matsushita Electric Ind Co Ltd | Gas combustion control device |
| JPS63267832A (en) * | 1987-04-24 | 1988-11-04 | Iseki & Co Ltd | Combustion control system for burner |
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| CN109519962B (en) | 2023-12-01 |
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