CN109028063A - Low NOx pulsation fuel gas buring method and device with rotary barrel throttle - Google Patents
Low NOx pulsation fuel gas buring method and device with rotary barrel throttle Download PDFInfo
- Publication number
- CN109028063A CN109028063A CN201811024641.5A CN201811024641A CN109028063A CN 109028063 A CN109028063 A CN 109028063A CN 201811024641 A CN201811024641 A CN 201811024641A CN 109028063 A CN109028063 A CN 109028063A
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- China
- Prior art keywords
- gas
- air
- throttle valve
- throttle
- pipeline
- Prior art date
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- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000010349 pulsation Effects 0.000 title claims abstract description 13
- 239000002737 fuel gas Substances 0.000 title claims abstract description 9
- 239000007789 gas Substances 0.000 claims abstract description 51
- 239000000446 fuel Substances 0.000 claims abstract description 9
- 238000002485 combustion reaction Methods 0.000 claims description 35
- 239000000567 combustion gas Substances 0.000 claims description 11
- 238000009841 combustion method Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
- F23D14/08—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with axial outlets at the burner head
-
- 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
- F23D14/62—Mixing devices; Mixing tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2203/00—Gaseous fuel burners
- F23D2203/007—Mixing tubes, air supply regulation
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The low NOx pulsation fuel gas buring method and device with rotary barrel throttle that the present invention relates to a kind of.Device includes gas pipeline, air pipeline and gas burner etc., rotary throttle valve is set in gas pipeline and air pipeline, each throttle valve is provided with servo motor, and servo motor is connected with adjustable frequency power, and the throttle valve is at work with certain frequency high speed rotation.Combustion method is to be rotated in throttle valve with certain frequency, to generate fluctuating resistance, when air pressure and gaseous-pressure are constant, air is regularly fluctuated with gas flow, air is connected with same adjustable frequency power with gas throttle valve, and two throttle valve openings are consistent when initial, it can guarantee that two throttle valve opening states are always consistent at any time in this way, air is consistent with the changing rule of gas flow, gas quantity is also low when air capacity is low, vice versa, it is ensured that air-fuel ratio is constant.
Description
Technical field
The present invention relates to technical field of fuel combustion, in particular to a kind of low NOx pulsation combustion gas combustion with rotary barrel throttle
Firing method and device.
Background technique
As China's industry and expanding economy, all kinds of pollutant emission problems become increasingly conspicuous, huge pressure is caused to environment
Power.Natural gas is a kind of very high fuel of clean-up performance, will not generate oxysulfide and dust in use process, be significantly better than coal
Charcoal and fuel oil, it is rising.However, can still discharge nitrogen oxides pollution (NOx) in combustion of natural gas, NOx is acid rain
The mankind and ecological environment are had very big harm by the important predecessor that one of main source and photochemical fog are formed.
In gas process, what NOx was mainly oxidized to form by the nitrogen in air at high temperature.In order to reduce combustion gas
Discharged nitrous oxides in journey, scholars propose the sides such as air classification, fuel staging, primary zone water spray and flue gas recirculation
Method, main thought are attempt to reduce local high temperature zone when burning.
Intermittent combustion is a kind of special periodical combustion process, is generally shaken by acoustics in combustion flame system and combustion tube
Dynamic forward direction phase mutual excitation causes.Intermittent combustion has many advantages, such as that high combustion efficiency, combustion intensity and heat transfer intensity are big.In addition, arteries and veins
The peak temperature of the dynamic lower flame that burns is low, and more evenly, local high temperature zone is small for Temperature Distribution；Pulsation blends the air of flame inside
Amount increases, and enhances chemical reaction rate；Intermittent combustion reduces conversion zone, shortens gas in the stop of high-temperature region
Between, so that NOx generation amount is small.Therefore, intermittent combustion is burning means a kind of efficient and with low NOx drainage characteristic.
Traditional intermittent combustion be by acoustic characteristic in pipe and flame system match in the way of realize, commonly set
Standby includes Schmidt's type and two kinds of Helmholtz pulsating combusting device.However, both burner structure design requirements are high, need
Burner acoustic characteristic is considered in detail, and is difficult to realize the conventional low NOx skill such as air classification and fuel staging in burner
Art.Meanwhile burner pulsation frequency is uncontrollable, adjustable range is small.
Summary of the invention
In order to make up for the deficiencies of the prior art, the low NOx pulsation combustion gas combustion with rotary barrel throttle that the present invention provides a kind of
Firing method and device.
The technical solution of the present invention is as follows:
A kind of low NOx pulsation gas combustion apparatus with rotary barrel throttle, which is characterized in that including gas pipeline, air
Rotary throttle valve is arranged in pipeline and gas burner etc. in gas pipeline and air pipeline, and each throttle valve, which is provided with, to be watched
Motor is taken, servo motor is connected with adjustable frequency power, and the throttle valve is at work with certain frequency high speed rotation.
The throttle valve uses butterfly valve form, and the ratio between area and the circulation area of airflow line are 0.1~0.2.
The servo motor that each throttle valve configures is all connected with same set of adjustable frequency power, two throttlings in initial position
The aperture of valve is consistent.
The frequency of the adjustable frequency power is consistent with the ripple frequency of burner combustion, frequency range 50-500Hz.
The gas burner can be it is any type of, only need to arrange swivel on gas pipeline and air pipeline
Flow valve, so that it may carry out intermittent combustion using this method.
Pulsed fuel gas buring method using the low NOx with rotary barrel throttle: gas burner air pipeline and
Rotary barrel throttle is respectively provided in gas pipeline, throttle valve is rotated with certain frequency, to generate fluctuating resistance, works as air pressure
When constant with gaseous-pressure, air is regularly fluctuated with gas flow.Air and gas throttle valve with same Frequency Adjustable
Power supply is connected, and it is initial when two throttle valve openings it is consistent, can guarantee two throttle valve opening states when any in this way
Carve always consistent, air is consistent with the changing rule of gas flow, and gas quantity is also low when air capacity is low, and vice versa, can
To guarantee that air-fuel ratio is constant.In the case, intermittent combustion is formed, combustion gas mixes with air intensity increase, can be used lower
Excess air coefficient, while intermittent combustion reduces conversion zone, shortens combustion gas in the residence time of high-temperature region, reduces
NOx emission.
The invention has the benefit that
1, the frequency of the intermittent combustion generated compared to traditional acoustics intermittent combustion mode, the present invention using rotary barrel throttle
Rate can be adjusted arbitrarily, not influenced by factors such as burner cavity geometric dimensions.
2, combustion method of the invention is not only suitable for new fuel gas combustion system, is also applied for existing burner reconstruction, the latter
It only needs to add throttle valve and related control device in combustion gas and air pipeline.
3, when using intermittent combustion, combustion gas mixes with air intensity increase, lower excess air coefficient can be used, together
When intermittent combustion reduce conversion zone, shorten combustion gas in the residence time of high-temperature region, reduce NOx emission.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is the low NOx pulsation gas combustion apparatus with rotary barrel throttle.
Fig. 2 is two typical operating positions of rotary barrel throttle, and (a) is that throttle valve is parallel with airflow direction, hardly
Generate resistance；(b) vertical with airflow direction for throttle valve, certain resistance can be generated.
Fig. 3 is the schematic three dimensional views that throttle valve is mounted in airflow line.
Fig. 4 is NOx emission experimental measurements when 2t/h gas burner uses this method, and wherein gas quantity is
164Nm3/ h, wind-warm syndrome and fuel gas temperature are room temperature, and burner is rotational flow gas-fired combustor.
In figure: 1, gas pipeline；2, gas throttle valve；3, gas throttle valve servo motor；4, air control shutter；5, air
Throttle valve servo motor；6, air pipeline；7, gas burner；8, adjustable frequency power.
Specific embodiment
Gas combustion apparatus, including gas pipeline 1, air as shown in Figure 1, a kind of low NOx with rotary barrel throttle is pulsed
Rotary throttle valve 2 and 4, each throttle valve is arranged in pipeline 6 and gas burner 7 etc. in gas pipeline 1 and air pipeline 6
It is provided with servo motor 3 and 5, two servo motors are connected with adjustable frequency power 8.Throttle valve is high with certain frequency at work
Speed rotation is only played the role of generating fluctuating resistance, can not cut off air-flow.As shown in Fig. 2, working as throttle valve and chimneying
When direction is parallel, it is nearly free from resistance, when rotation is extremely vertical with airflow direction, certain resistance can be generated.Work as throttling
When valve persistently rotates, air and the pulsation of gas flow pests occurrence rule.As shown in figure 3, throttle valve use butterfly valve form, area with
The ratio between circulation area of airflow line is 0.1~0.2.Throttle valve in gas pipeline 1 and air pipeline 6, servo motor are equal
It is controlled by same set of power supply, and aperture is consistent at the beginning, therefore can guarantee that the aperture of two throttle valves at any time is equal
Unanimously.The frequency of adjustable frequency power, frequency range 50-500Hz consistent with the ripple frequency of burning.
Its working principle is that: throttle valve 2 and 4 is rotated with certain frequency, to generate fluctuating resistance, when air pressure with
When gaseous-pressure is constant, air is regularly fluctuated with gas flow.Air and gas throttle valve with same Frequency Adjustable electricity
Source 8 is connected, and it is initial when two throttle valve openings it is consistent, can guarantee two throttle valve opening states so at any time
Always consistent, air is consistent with the changing rule of gas flow, and gas quantity is also low when air capacity is low, and vice versa, can be with
Guarantee that air-fuel ratio is constant.In the case, intermittent combustion is formed, combustion gas mixes with air intensity increase, can be used lower
Excess air coefficient, while intermittent combustion reduces conversion zone, shortens combustion gas in the residence time of high-temperature region, reduces
NOx emission.
Application Example
As shown in figure 4, having carried out experimental verification in the present inventive method.Select a 2t/h rotational flow gas-fired combustor, wind
Mild fuel gas temperature is room temperature, gas quantity 164Nm3/ h is mounted with rotary barrel throttle in fuel gas conduit and air hose, works as rotation
When trochanter stream valve frequency is 200Hz, intermittent combustion is produced, flame is fluctuated, and NOx emission value is substantially reduced, with stable state
Burning (rotary barrel throttle standard-sized sheet is simultaneously kept fixed) is compared, and in different air fuel ratio values, NOx abatement amount is about 25% or so.
Although in conjunction with attached drawing, the present invention is described, and those skilled in the art can without creative work
The various changes and modifications made, are within the scope of the invention.
Claims (5)
- The gas combustion apparatus 1. low NOx with rotary barrel throttle is pulsed, which is characterized in that including gas pipeline, air pipeline and Gas burner, is arranged rotary throttle valve in gas pipeline and air pipeline, and each throttle valve is provided with servo motor, watches It takes motor to be connected with adjustable frequency power, the throttle valve is at work with certain frequency high speed rotation.
- 2. the low NOx pulsation gas combustion apparatus with rotary barrel throttle, characteristic are the throttling as described in claim 1 Valve is butterfly valve structure, and the ratio between area and the circulation area of airflow line are 0.1~0.2.
- 3. the low NOx pulsation gas combustion apparatus with rotary barrel throttle, characteristic are as described in claim 1: each throttling The servo motor that valve configures is all connected with same set of adjustable frequency power, and in initial position, the aperture of two throttle valves is consistent.
- 4. the low NOx pulsation gas combustion apparatus with rotary barrel throttle, characteristic are as described in claim 1: described can The frequency of variable frequency power source and the ripple frequency of burner combustion are consistent, frequency range 50-500Hz.
- A kind of fuel gas buring method 5. low NOx with rotary barrel throttle is pulsed, it is characterised in that: in the air hose of gas burner Rotary barrel throttle is respectively provided in road and gas pipeline, throttle valve is rotated with certain frequency, to generate fluctuating resistance, works as air When pressure and gaseous-pressure are constant, air is regularly fluctuated with gas flow, and air and gas throttle valve can with same Variable frequency power source is connected, and it is initial when two throttle valve openings it is consistent, guarantee that two throttle valve opening states begin at any time It being consistent eventually, air is consistent with the changing rule of gas flow, and keep air-fuel ratio constant, in this case, intermittent combustion is formed, combustion Gas mixes with air intensity increase, reduces NOx emission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811024641.5A CN109028063A (en) | 2018-09-04 | 2018-09-04 | Low NOx pulsation fuel gas buring method and device with rotary barrel throttle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811024641.5A CN109028063A (en) | 2018-09-04 | 2018-09-04 | Low NOx pulsation fuel gas buring method and device with rotary barrel throttle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109028063A true CN109028063A (en) | 2018-12-18 |
Family
ID=64623210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811024641.5A Pending CN109028063A (en) | 2018-09-04 | 2018-09-04 | Low NOx pulsation fuel gas buring method and device with rotary barrel throttle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109028063A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116447518A (en) * | 2023-04-03 | 2023-07-18 | 广东港能新能源科技有限公司 | Natural gas conveying pipeline pressure regulating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2325665Y (en) * | 1998-03-13 | 1999-06-23 | 石油大学(华东) | Frequency regulation and revolving type pulsation generator |
| CN1389643A (en) * | 2001-06-04 | 2003-01-08 | 财团法人工业技术研究院 | Micropulsated fuel oil jetting system |
| CN101493229A (en) * | 2009-01-15 | 2009-07-29 | 哈尔滨工业大学 | Control method for multiple tail tube pulsating combustor and apparatus |
| CN102192500A (en) * | 2011-02-28 | 2011-09-21 | 哈尔滨工业大学 | Pulsation combustion heating furnace |
| CN105782963A (en) * | 2016-03-02 | 2016-07-20 | 马骏 | Pulsating combustion device with high interference resistance |
| CN107525066A (en) * | 2017-09-18 | 2017-12-29 | 中国矿业大学 | A kind of high-power array low concentration gas pulsating combustion method and device |
| CN107575858A (en) * | 2017-08-02 | 2018-01-12 | 时伟 | A kind of pulse combustion device having compared with strong anti-interference ability based on Internet of Things |
| CN208871622U (en) * | 2018-09-04 | 2019-05-17 | 浙江三杰能源科技有限公司 | Low NOx pulsation gas combustion apparatus with rotary barrel throttle |
-
2018
- 2018-09-04 CN CN201811024641.5A patent/CN109028063A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2325665Y (en) * | 1998-03-13 | 1999-06-23 | 石油大学(华东) | Frequency regulation and revolving type pulsation generator |
| CN1389643A (en) * | 2001-06-04 | 2003-01-08 | 财团法人工业技术研究院 | Micropulsated fuel oil jetting system |
| CN101493229A (en) * | 2009-01-15 | 2009-07-29 | 哈尔滨工业大学 | Control method for multiple tail tube pulsating combustor and apparatus |
| CN102192500A (en) * | 2011-02-28 | 2011-09-21 | 哈尔滨工业大学 | Pulsation combustion heating furnace |
| CN105782963A (en) * | 2016-03-02 | 2016-07-20 | 马骏 | Pulsating combustion device with high interference resistance |
| CN107575858A (en) * | 2017-08-02 | 2018-01-12 | 时伟 | A kind of pulse combustion device having compared with strong anti-interference ability based on Internet of Things |
| CN107525066A (en) * | 2017-09-18 | 2017-12-29 | 中国矿业大学 | A kind of high-power array low concentration gas pulsating combustion method and device |
| CN208871622U (en) * | 2018-09-04 | 2019-05-17 | 浙江三杰能源科技有限公司 | Low NOx pulsation gas combustion apparatus with rotary barrel throttle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116447518A (en) * | 2023-04-03 | 2023-07-18 | 广东港能新能源科技有限公司 | Natural gas conveying pipeline pressure regulating device |
| CN116447518B (en) * | 2023-04-03 | 2023-11-10 | 广东港能新能源科技有限公司 | Natural gas conveying pipeline pressure regulating device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20181218 |