CN105090949B - Method for making air inflows of secondary air pipes of turbulent burner even and measuring device - Google Patents
Method for making air inflows of secondary air pipes of turbulent burner even and measuring device Download PDFInfo
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- CN105090949B CN105090949B CN201510556446.7A CN201510556446A CN105090949B CN 105090949 B CN105090949 B CN 105090949B CN 201510556446 A CN201510556446 A CN 201510556446A CN 105090949 B CN105090949 B CN 105090949B
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000002485 combustion reaction Methods 0.000 claims description 27
- 238000005259 measurement Methods 0.000 claims description 14
- 230000008676 import Effects 0.000 claims description 6
- 239000003245 coal Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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Abstract
The invention provides a method for making the air inflows of secondary air pipes of a turbulent burner even and a measuring device. The method includes the steps that the pressure of an inlet of each secondary air pipe of the turbulent burner is detected; and according to the pressure of the inlet of each secondary air pipe of the turbulent burner, the flow area of each secondary air pipe is adjusted, so that the equation shown in the specification is satisfied, wherein Ai is the flow area of the ith secondary air pipe of the turbulent burner, Pi is the pressure of the inlet of the ith secondary air pipe of the turbulent burner, deltaPmx is the largest difference value of the pressure of the corresponding secondary air pipe of the turbulent burner and the negative pressure of a hearth, and const is a constant. By the adoption of the method and the cutter, the problems that the air inflows of the secondary air pipes of the turbulent burner are not even due to the fact that the pressures inside an air box are not uniform can be solved.
Description
Technical field
The invention belongs to turbulent burner field, more particularly to one kind make turbulent burner secondary air channel intake uniform
Method and measurement apparatus.
Background technology
Coal burner is the major part of boiler combustion, and the performance of burner has to the stability burnt and economy
Very big impact, therefore the operation using rational combustion system and stable combustion technology to unit is most important.Turbulent burner energy
Enough ignited wind powder mixture using the high-temperature flue gas of Central backflow area, improve the stability of flame, led in station boiler application
Occupy certain ratio in domain.In the running of turbulent burner, First air passage is located in the middle part of burner, and First air is
Direct current, the both sides of big bellows of the secondary wind from burner region are entered so that in bellows, pressure at both sides is high, and intermediate pressure is inclined
It is low, based on this, if will be each combustor inlet adjustment consistent, the difference of the spout secondary wind of each turbulent burner will be caused,
Cause uneven into the air quantity in burner secondary air channel.Therefore need to set up a kind of method of adjustment combustor inlet, uniformly
Air quantity, to realize the steady combustion of boiler.
For the regulation of primary air piping, main stable combustion measure is：
1) under usual concentration of pulverized coal, build up smoke backflow is returned by the heat of produced high-temperature gas
Flow the means as stable ignition；
2) Dense Dilute Pulverized Coal Separator or pulverized coal concentrator are installed additional in primary air piping, wind powder air-flow is divided into after deep or light two strands
It is respectively fed to the deep or light spout of burner；
3) ring gear stabilizer is installed additional in primary air piping, form ring-type recirculating zone, postpone secondary wind and coal after making stabilizer
The incorporation time of powder air-flow, it is ensured that breeze airflow concentration.
For secondary wind and tertiary air, using air stage feeding and air register is installed additional, so as to flexible air quantity ratio and rotation
Intensity of flow, for Actual combustion ature of coal, determines optimal air quantity and swirl strength by burning optimization, realizes steady combustion.
Above-mentioned prior art, only realizes integrally-regulated, the combustion for not having the consideration for refining different of First air and secondary wind
The difference of the secondary wind between burner is simultaneously adjusted, and unresolved uneven into the air quantity in each turbulent burner secondary air channel
Even problem.
The content of the invention
The present invention provides one kind and makes the uniform method of turbulent burner secondary air channel intake and measurement apparatus, to solve
Due to the uneven problem of the secondary air flow entered in turbulent burner secondary air channel caused by inner bellows pressure disunity.
In order to achieve the above object, the present invention provides a kind of secondary air channel air output for making turbulent burner uniformly side
Method, the method include：
Detect the pressure of the turbulent burner secondary air channel entrance；
The circulation area of the secondary air channel is adjusted according to the pressure of the secondary air channel entrance so that equationSet up；
Wherein, AiFor the flow area of i-th turbulent burner secondary air channel, PiFor i-th turbulent burner secondary air channel
The pressure of entrance, Δ PmxFor the maximum of the pressure and combustion chamber draft difference of turbulent burner secondary air channel entrance, const
For constant.
Further, the rotation is detected by way of pressure transducer is installed in turbulent burner secondary air channel entrance
The pressure of stream burner secondary air channel entrance.
Further, the pressure of the turbulent burner secondary air channel entrance and the maximum of combustion chamber draft difference according to
Equation below is calculated：
ΔPmx=max (P1+50,P2+50,…,Pn+ 50),
Wherein, n is constant, indicates n turbulent burner.
Another one kind that provides of the invention makes the uniform measurement apparatus of turbulent burner secondary air channel intake, the measurement apparatus bag
Include：Pressure transducer, processor and adjusting module；
The pressure transducer is used for the pressure for detecting the turbulent burner secondary air channel entrance；
The processor connects the pressure transducer, adjusts according to the Stress control of the secondary air channel entrance
Module adjusts the circulation area of the secondary air channel so that equationSet up；
Wherein, AiFor the flow area of i-th turbulent burner secondary air channel, PiFor i-th turbulent burner secondary air channel
The pressure of entrance；ΔPmxFor the maximum of the pressure and combustion chamber draft difference of turbulent burner secondary air channel entrance.
Further, the pressure of the turbulent burner secondary air channel entrance and the maximum of combustion chamber draft difference according to
Equation below is calculated：
ΔPmx=max (P1+50,P2+50,…,Pn+ 50),
Wherein, n is constant, indicates n turbulent burner.
One kind that the present invention is provided makes the uniform method of turbulent burner secondary air channel intake and measurement apparatus, by micro-
Piezometer will appreciate that the pressure distribution situation of each turbulent burner secondary air channel entrance in bellows, by the pressure pair for measuring
The flow area of each turbulent burner secondary air channel is adjusted, and then is adjusted into the secondary air flow of each secondary air channel, to reach
Uniform, the combustion stablized purpose to air quantity.
Description of the drawings
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below by the accompanying drawing to using required for embodiment
It is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, general for this area
For logical technical staff, without having to pay creative labor, can be with according to these other accompanying drawings of accompanying drawings acquisition.
The flow charts that make turbulent burner secondary air channel intake uniform method of the Fig. 1 for one embodiment of the invention；
Fig. 2 makes the uniform measurement apparatus pie graph of turbulent burner secondary air channel intake for one embodiment of the invention；
Fig. 3 is the position signal that the turbulent burner secondary air channel entrance of one embodiment of the invention installs micromanometer additional
Figure.
Specific embodiment
In order that the technical characterstic and effect of the present invention become apparent from, below in conjunction with the accompanying drawings technical scheme is done
Further illustrate, the instantiation that the present invention also can have other different being illustrated or implement, any those skilled in the art
The equivalents done within the scope of the claims belong to the protection category of the present invention.
As shown in figure 1, for the stream for making the uniform method of turbulent burner secondary air channel intake of one embodiment of the invention
Cheng Tu, the method include：
Step S1：Detect the pressure of the turbulent burner secondary air channel entrance.Specifically, by turbulent burner
The mode of pressure transducer (such as tosimeter) is installed and detects the turbulent burner secondary air channel entrance in secondary air channel entrance
Pressure.
Step S2：The circulation area of the secondary air channel is adjusted according to the pressure of the secondary air channel entrance so that etc.
FormulaSet up；
Wherein, AiFor the flow area of i-th turbulent burner secondary air channel, PiFor i-th turbulent burner secondary air channel
The pressure of entrance, Δ PmxFor the maximum of the pressure and combustion chamber draft difference of turbulent burner secondary air channel entrance, const
For constant.
It should be noted that the present invention is to the value of const and is not particularly limited, in concrete operations, according to secondary
The pressure of airduct entrance adjusts the circulation area of each secondary air channel, makes each secondary air channel circulation area after adjustment cause equationSet up, const does not have fixed value, according to actual adjustment
Depending on.
Specifically, each turbulent burner secondary air channel inlet pressure P is measured using minute-pressurei, find out secondary air channel and enter
The maximum Δ P of pressure and combustion chamber draft difference at mouthfulmx, calculateGo out in turbulent burner external secondary airduct
There is tune wind disk at mouthful, adjusting has scale on wind disk, staff adjusts secondary air channel import by adjusting the scale on wind disk
The flow area A of area, i.e. turbulent burner secondary air channeliSize, import secondary air flow is adjusted with this.When
When larger, reduce flow area A by adjusting wind dial scalei, conversely, working asWhen less, by adjusting wind disk
Scale increases flow area Ai, make eachValue it is identical.
In other embodiments of the present invention, other adjustment modes can also be adopted so that equation
Set up.
Further, it is generally the case that as hearth vacuum control is in -50Pa, therefore, i-th secondary air inlet static pressure
Difference with combustion chamber draft is Pi- (- 50)=Pi+ 50, the pressure and combustion chamber draft of the turbulent burner secondary air channel entrance
The maximum of difference is calculated according to equation below：
ΔPmx=max (P1+50,P2+50,…,Pn+ 50),
Wherein, n is constant, indicates n turbulent burner.
The present invention will appreciate that the pressure distribution of each turbulent burner secondary air channel entrance in bellows by micromanometer
Situation, is adjusted to the flow area of each turbulent burner secondary air channel by the pressure for measuring, and then is adjusted into each two
The secondary air flow of secondary airduct, to reach air quantity uniformly, combustion stablized purpose.
As described in Figure 2, it is that one embodiment of the invention makes the uniform measurement apparatus of turbulent burner secondary air channel intake,
The measurement apparatus include micromanometer 10, processor 20 and adjusting module 30.
With reference to shown in Fig. 3, the micromanometer 10 is arranged at the entrance of each turbulent burner secondary air channel 50, for examining
Survey the pressure of the turbulent burner secondary air channel entrance.Adjusting module is arranged at the outside of each secondary air channel, for basis
Adjust instruction, adjusts the circulation area of each secondary air channel.The processor 20 connects the micromanometer 10, according to described secondary
Described in the Stress control of airduct entrance, adjusting module 30 adjusts the circulation area of the secondary air channel so that equationSet up；
Wherein, AiFor the flow area of i-th turbulent burner secondary air channel, PiFor i-th turbulent burner secondary air channel
The pressure of entrance；ΔPmxFor the maximum of the pressure and combustion chamber draft difference of turbulent burner secondary air channel entrance.
Further, the pressure of the turbulent burner secondary air channel entrance and the maximum of combustion chamber draft difference according to
Equation below is calculated：
ΔPmx=max (P1+50,P2+50,…,Pn+ 50),
Wherein, n is constant, indicates n turbulent burner.
Fig. 3 being referred to again, being described for convenience, the secondary air channel 50 of each turbulent burner, eddy flow combustion are only gived in Fig. 3
The other structures of burner do not show that each secondary air channel is placed in big bellows 40, and secondary wind enters each secondary from the both sides of bellows
In airduct, the secondary air flow that can have by technical scheme in the different turbulent burner secondary air channels of the adjustment being directed to
Difference, solves that secondary air flow that the pressure difference of inner bellows zones of different caused entry in each secondary air channel is different to ask
Topic.
The present embodiment in the specific implementation, after processor obtains each turbulent burner secondary air channel import static pressure, according to public affairs
FormulaSend the adjusting module (such as operated pneumatic valve) of control instruction to each secondary air channel, adjusting module root
It is according to the circulation area of each turbulent burner secondary air channel of instruction adjustment, uniform so as to reach the secondary air flow in secondary air channel.
The present invention is not intended to limit secondary air channel circulation area method of adjustment, in other embodiments of the invention, can also be according to survey
The each turbulent burner secondary air channel static pressure for obtaining, the artificial regulated quantity for calculating each secondary air channel, staff is according to tune
Whole amount, adjusts the tune wind disk of turbulent burner, so as to reach the purpose of the circulation area for changing secondary air channel import.
What the present invention was provided makes the uniform measurement apparatus of turbulent burner secondary air channel intake, can by micromanometer
Understand the pressure distribution situation of each turbulent burner secondary air channel entrance in bellows, by the pressure of measurement to each swirl flow combustion
The flow area of device secondary air channel is adjusted, and then is adjusted into the secondary air flow of each secondary air channel, uniform to reach air quantity,
Combustion stablized purpose.
The above is merely to illustrate technical scheme, any those of ordinary skill in the art can without prejudice to
Under the spirit and the scope of the present invention, above-described embodiment is modified and is changed.Therefore, the scope of the present invention should be regarded
Right is defined.
Claims (5)
1. one kind makes the uniform method of turbulent burner secondary air channel intake, it is characterised in that the method includes：
Detect the pressure of the turbulent burner secondary air channel entrance；
The circulation area of the secondary air channel is adjusted according to the pressure of the secondary air channel entrance so that equation Set up；
Wherein, AiFor the flow area of i-th turbulent burner secondary air channel, PiFor i-th turbulent burner secondary air channel import
The pressure at place, Δ PmxFor the maximum of the pressure and combustion chamber draft difference of turbulent burner secondary air channel entrance, const is normal
Amount.
2. make the uniform method of turbulent burner secondary air channel intake as claimed in claim 1, it is characterised in that by
The mode of pressure transducer is installed and detects the turbulent burner secondary air channel entrance in turbulent burner secondary air channel entrance
Pressure.
3. the uniform method of turbulent burner secondary air channel intake is made as claimed in claim 1, it is characterised in that the rotation
The pressure of stream burner secondary air channel entrance is calculated according to equation below with the maximum of combustion chamber draft difference：
ΔPmx=max (P1+50,P2+50,…,Pn+ 50),
Wherein, n is constant, indicates n turbulent burner.
4. one kind makes the uniform measurement apparatus of turbulent burner secondary air channel intake, it is characterised in that the measurement apparatus include：
Pressure transducer, processor and adjusting module；
The pressure transducer is used for the pressure for detecting the turbulent burner secondary air channel entrance；
The processor connects the pressure transducer, the adjusting module according to the Stress control of the secondary air channel entrance
Adjust the circulation area of the secondary air channel so that equationSet up；
Wherein, AiFor the flow area of i-th turbulent burner secondary air channel, PiFor i-th turbulent burner secondary air channel import
The pressure at place；ΔPmxFor the maximum of the pressure and combustion chamber draft difference of turbulent burner secondary air channel entrance.
5. the uniform measurement apparatus of turbulent burner secondary air channel intake are made as claimed in claim 4, it is characterised in that institute
The pressure and the maximum of combustion chamber draft difference for stating turbulent burner secondary air channel entrance is calculated according to equation below：
ΔPmx=max (P1+50,P2+50,…,Pn+ 50),
Wherein, n is constant, indicates n turbulent burner.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105605565B (en) * | 2016-01-18 | 2017-09-22 | 华北电力科学研究院有限责任公司 | The method of adjustment of radial direction swirl vane best angle in turbulent burner |
| CN109187039B (en) * | 2018-07-09 | 2020-08-18 | 北京航空航天大学 | Spraying uniformity detection device of blade spraying type swirler |
| CN110043902B (en) * | 2019-03-07 | 2020-10-09 | 国网浙江省电力有限公司电力科学研究院 | Method and device capable of adjusting secondary air volume of cyclone burner in real time |
| CN110031176A (en) * | 2019-04-23 | 2019-07-19 | 华北电力科学研究院有限责任公司 | Boiler cold-state air force field measurement device and method |
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| CN103423765A (en) * | 2013-08-29 | 2013-12-04 | 国家电网公司 | Air distribution coupling burning method and system for reducing NOX exhaust |
| CN203364126U (en) * | 2013-06-03 | 2013-12-25 | 诸暨天立环保节能技术有限公司 | Efficient multivariant industrial boiler powder combustor |
| CN104040129A (en) * | 2012-01-04 | 2014-09-10 | 丰田自动车株式会社 | Secondary air supply system for internal combustion engine |
| CN104165357A (en) * | 2014-08-29 | 2014-11-26 | 中国建筑材料科学研究总院 | Burner |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104040129A (en) * | 2012-01-04 | 2014-09-10 | 丰田自动车株式会社 | Secondary air supply system for internal combustion engine |
| CN203364126U (en) * | 2013-06-03 | 2013-12-25 | 诸暨天立环保节能技术有限公司 | Efficient multivariant industrial boiler powder combustor |
| CN103423765A (en) * | 2013-08-29 | 2013-12-04 | 国家电网公司 | Air distribution coupling burning method and system for reducing NOX exhaust |
| CN104165357A (en) * | 2014-08-29 | 2014-11-26 | 中国建筑材料科学研究总院 | Burner |
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