CN109945212A - A kind of low-heating-value gas burner and combustion method - Google Patents
A kind of low-heating-value gas burner and combustion method Download PDFInfo
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- CN109945212A CN109945212A CN201711380248.5A CN201711380248A CN109945212A CN 109945212 A CN109945212 A CN 109945212A CN 201711380248 A CN201711380248 A CN 201711380248A CN 109945212 A CN109945212 A CN 109945212A
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Abstract
The present invention is regarding to the issue above, a kind of low-heating-value gas burner and its combustion method for improving combustibility, reducing discharge is disclosed, it realizes that burning is abundant, combustion zone temperature field distribution is uniform, the standard compliant purpose of discharged nitrous oxides, ensures the economy and the feature of environmental protection of burner operation.Low-heating-value gas burner, the combustion air channel formed including multiple cylinder coaxial packages and blast tube, the arrangement ecto-entad in channel is followed successively by axis stream wind channel 2, Whirl deposite tank channel 3, low-BTU gas channel 4, high heat value gas channel 5, center wind duct 6, ignition channel 7 is set in center wind duct 6, is provided with flame cover 1 outside axis stream wind channel 2.By the setting of low-BTU gas and high heat value gas ratio, distributing rationally for fuel is realized, stablize burning, reduce fuel cost, discharge amount reduction significantly.
Description
Technical field
The present invention relates to a kind of burners and its combustion method for lower heat of combustion gas, belong to combustion science technology
Field.
Technical background
Since energy supply tends to be nervous, fuel price goes up therewith, the fuel gas with low heat value conduct as industry byproduct
The application of alternative fuel is more and more studied.Burner is to convert thermal energy for the chemical energy of fuel in rotary system
Equipment, the quality of burner performance directly affect the efficiency of combustion of rotary kiln burning system and the discharge index of pollutant.It passes
The burner of system is dependent on the petrochemical industries fuel such as coal dust, natural gas, under the requirement that contemporary industry develops new situations, burner
It is faced with bring challenge the problems such as from energy shortage and environmental protection standard raising.Thus, low calorie fuels is in burner
On clean and effective utilize have important economic benefit and environment protection significance.
Gaseous fuel self-heating amount is usually lower than 6.28MJ/m3Fuel gas be divided into low-BTU gas.Industry
In common low calorific value gas fuel mainly have chemical process low-heating-value tail gas, blast furnace gas, petrochemical industry smelting exhaust,
Coal mine light concentration mash gas gas etc..The combustible component that low-BTU gas contains is low, and ignition point is high, is difficult to stablize burning, while also having
Standby: the advantage that industrial source is extensive, total amount is big, how preferably to play the superiority of fuel gas with low heat value on the burner has weight
The realistic meaning wanted.
In practical application, the method for thering is use raising combustion field local temperature to be readily burned low-BTU gas, but nitrogen
The production quantity of oxide with flame temperature raising exponent function relation increase, while also resulting in the uneven shadow of kiln temperature
The problem of ringing heating quality, the economical operation burnt to rotary kiln bring the drawbacks such as stability is poor, discharged nitrous oxides are exceeded.
Summary of the invention
The present invention in view of the above-mentioned problems, disclose it is a kind of raising combustibility, reduce discharge low-heating-value gas burner and
Its combustion method is realized that burning is abundant, combustion zone temperature field distribution is uniform, the standard compliant purpose of discharged nitrous oxides, is ensured
The economy and the feature of environmental protection of burner operation.
A kind of low-heating-value gas burner, the combustion air channel formed including multiple cylinder coaxial packages and combustion gas are logical
The outlet connection of road, combustion air channel and blast tube is in same mixed zone, it is characterised in that:
The arrangement ecto-entad of combustion air channel and blast tube is followed successively by axis stream wind channel 2, Whirl deposite tank channel 3, low heat value
Gas passage 4, high heat value gas channel 5, center wind duct 6, center wind duct 6 is interior to be arranged ignition channel 7, axis stream wind channel 2
It is provided with flame cover 1 outside.
It is provided with gas turbulator 8 in the low-BTU gas channel 4, is provided with gas in high heat value gas channel 5
Cyclone 9.
It is provided with axis stream wind regulating device 10 on the axis stream wind channel 2, is provided with Whirl deposite tank tune on Whirl deposite tank channel 3
Regulating device 11.
The discharge area in the low-BTU gas channel 4 and high heat value gas channel 5 is adjustable whole, adjusts ratio
Are as follows: 2.8:1, adjustable range are as follows: ± 20%；
The 8 eddy flow angle of gas turbulator in low-BTU gas channel 4 is 22 ° ~ 38 °；The gas cyclone in high heat value gas channel 5
9 eddy flow angle of device is 15 ° ~ 23 °；
It is adjustable into the low-BTU gas of burner, high heat value gas ratio, most preferably adjust ratio are as follows: 1:1~1:3；
A kind of low heat value gas burning method, by the high heating value gas of the low-BTU gas of larger volume flow and smaller size smaller flow
The air quantity ratio of body multifuel combustion, centre wind, Whirl deposite tank and axis stream wind is adjustable, it is characterised in that:
The low-BTU gas accounts for the 15% ~ 55% of combustion gas total amount of heat；
The ratio of the low-BTU gas and high heat value gas calorific value is 1:5；
Flow velocity of the low-BTU gas in pipeline is 15 ~ 25 m/s, muzzle velocity is 20 ~ 35 m/s, the height
Flow velocity of the calorific value gas in pipeline is 25 ~ 38 m/s, muzzle velocity is 45 ~ 65m/s；
The optimal proportion of centre wind, Whirl deposite tank and axis stream wind air quantity is 1:39:60, adjustable range are as follows: ± 20%.
Beneficial effects of the present invention:
1, using the less high heating value combustion gas of burning is mixed in fuel gas with low heat value as auxiliary fuel, high heating value combustion gas is formed after lighting
Stable high temperature heat source, optimizes ignition condition, solves the problems, such as that low-BTU gas kindling is difficult, is difficult to surely fire, makes low-heat
Value gas is widely applied, and high heat value gas is applied on a small quantity, significantly reduces fuel cost.
2, structure of the invention is provided with Whirl deposite tank channel and axis stream wind channel in the outside of low calorific value gas fuel, and passes through
Each parameter is distributed rationally, is enhanced the mixing of fuel and air, is made uniform distribution of temperature field, and unburnt fuel is reduced
Loss, effectively reduces the generation of nitrogen oxides, discharge amount is made to meet environmental requirement.
Detailed description of the invention
Fig. 1 is the head channel schematic diagram of burner of the present invention,
Fig. 2 is the overall structure diagram of burner of the present invention.
Specific embodiment
The invention will be further described by the following examples.From burner head figure shown in FIG. 1 as it can be seen that low heat value
4 radial space of blast tube is big, and the combustion gas of large volume flow is suitble to pass through；From the flow direction of combustion gas, fuel gas with low heat value
Enter in burner from entrance 12, fuel gas with low heat value channel 4 is located on the outside of high heating value blast tube 5, and combustion air is from combustion air
Entrance 14 enters burner, distributes to axis stream wind channel 2 and Whirl deposite tank channel 3, combustion air is located at outside fuel gas with low heat value channel 4
Side, high heating value combustion gas enter in burner from entrance 13, and fuel gas with low heat value channel 4, high heating value blast tube 5 and combustion air are logical
Same mixed zone is led in road outlet, and fuel gas with low heat value and combustion air are sufficiently mixed in mixed zone.High heating value combustion gas is easy to
Fire and kindling is stablized, combustion air and combustion gas axially spray, the rotation direction effect in Whirl deposite tank channel 3, blast tube gas cyclone
Device 8, the effect of 9 rotation directions, keep combustion gas and air radially more fully mixed, more evenly.High heating value combustion gas is drawn as the stable gas that ignites
A large amount of low-BTU gas kindling is fired, the centre wind in center wind duct 6 plays the role of that mixed airflow is prevented to flow back, mends simultaneously
Fill flame kernel position oxygen.Ignition channel 7 is set in center wind duct 6, is conveniently ignited.Hold together flame cover 1 eliminate flame diverging,
It expands outwardly, gathers air-flow to central area, there is good directionality and stability, do not occur localized hyperthermia and sweep kliner coating
The phenomenon that, the drawbacks of eliminating localized hyperthermia, make uniform distribution of temperature field, to reduce the generation of thermal NO x.Pass through axis
The Whirl deposite tank regulating device 11 flowed in the axis stream wind regulating device 10 and Whirl deposite tank channel 3 on wind channel 2 adjusts air quantity ratio, with
It adapts to kiln condition and reaches best combustion effect.
The present invention passes through the setting of low-BTU gas and high heat value gas ratio, realizes distributing rationally for fuel, stablizes combustion
It burns, reduce fuel cost, discharge amount reduces significantly.
Reduce the embodiment of NOx emission:
1, crude fuel is single fire high heating value combustion gas coke-stove gas
(1) desulfurization fans entrance smoke growing amount calculates as follows:
It according to gaseous fuel amount of theoretical flue gas calculation method, is computed, the amount of theoretical flue gas that coke-stove gas burning generates is
4.97m3 Flue gas/m3 Coke-stove gas
Calculation formula: operating condition exhaust gas volumn=mark condition exhaust gas volumn × 101.33 × (operating temperature+273.15)/(operating pressure+reality
Atmospheric pressure)/273.15,
Desulfurization fans entrance exhaust gas volumn calculates (exhaust gas volumn of fan outlet containing backheat and the cold two sections of exhaust gas volumns of ring, the cold two sections of blowers of ring
Air quantity 2500BM3/ min, based on actual use 90%.Desulfurization fans entrance pressure be -2.1kpa, 140 DEG C of temperature, local atmosphere
Pressure is 96KPa), another excess air coefficient of counting is 1.1, then can be calculated desulfurization fans entrance exhaust gas volumn is 331573m3/h。
(2) based on yield 6400t/d, finished ball intensity 2500N/, winter NOx discharge is 450mg/m3Flue gas contains
Backheat fan outlet exhaust gas volumn and other positions exhaust gas volumn, then NOx hours total emission volumns be 450 × 331573=
149207850mg/h
2, post fuel is improved using the present invention and uses blast furnace gas and coke-stove gas multifuel combustion, coke-stove gas dosage is 8350m3/ h,
Blast furnace gas dosage is 10000m3/ h, the amount of theoretical flue gas that blast furnace gas combustion generates are 1.54m3 Flue gas/m3 Blast furnace gas
(1) desulfurization fans entrance exhaust gas volumn calculates (the hot fume amount of the exhaust gas volumn of fan outlet containing backheat and the cold two sections of generations of ring),
Consider 1.1 excess air coefficients, then desulfurization fans entrance exhaust gas volumn is calculated as 344413m3/h。
(2) based on yield 6400t/d, finished ball intensity 2500N/, (winter NOx discharge is for NOx hours total emission volumns
< 300mg/m3Flue gas, the exhaust gas volumn of fan outlet containing backheat and other positions exhaust gas volumn):
300×344413=103323900mg/h
3, NOx hours discharge amounts are reduced compared to former burner after replacing burner: 149207850-103323900=
45883950mg/h
Using structure of the invention and method multifuel combustion fuel gas with low heat value and high heating value combustion gas, it can be effectively reduced kindling lower limit, make
Air mixture is easier to catch fire, while the combustion gas calorific value of unit volume increases, this burner structure makes fuel gas mixture as a result,
Easily reach ignition temperature, gas concentration in inflammability limit, combustion gas mix with air uniformly, so that burner is being kept low nitrogen oxygen
Sustainable utilization mixture carries out stablizing burning offer thermal energy in the case where compound production quantity.Burner structure and combustion of the invention
Firing method is suitable for the various low calorific value gas fuels that burn.
Claims (9)
1. a kind of low-heating-value gas burner, the combustion air channel formed including multiple cylinder coaxial packages and blast tube,
The outlet connection of combustion air channel and blast tube is in same mixed zone, it is characterised in that: combustion air channel and combustion gas are logical
The arrangement ecto-entad in road is followed successively by axis stream wind channel (2), Whirl deposite tank channel (3), low-BTU gas channel (4), high heating value gas
Body channel (5), center wind duct (6), center wind duct (6) is interior to be arranged ignition channel (7), is provided with outside axis stream wind channel (2)
Hold together flame cover (1).
2. a kind of low-heating-value gas burner according to claim 1, it is characterised in that: the low-BTU gas channel
(4) it is provided with gas turbulator (8) in, is provided with gas turbulator (9) in high heat value gas channel (5).
3. a kind of low-heating-value gas burner according to claim 1, it is characterised in that: the axis stream wind channel (2)
On be provided with axis stream wind regulating device (10), Whirl deposite tank regulating device (11) are provided on Whirl deposite tank channel (3).
4. a kind of low-heating-value gas burner according to claim 1, it is characterised in that: the low-BTU gas channel
(4) and the discharge area of high heat value gas channel (5) is adjustable whole, adjusts ratio are as follows: 2.8:1, adjustable range are as follows: ±
20% 。
5. a kind of low-heating-value gas burner according to claim 1, it is characterised in that: low-BTU gas channel (4)
Gas turbulator (8) eddy flow angle is 22 ° ~ 38 °；Gas turbulator (9) the eddy flow angle in high heat value gas channel (5) is
15°~ 23°。
6. a kind of low-heating-value gas burner according to claim 1, it is characterised in that: low-BTU gas, high heating value gas
Body ratio is adjustable, most preferably adjusting ratio are as follows: 1:1~1:3.
7. a kind of low heat value gas burning method, by the high heating value of the low-BTU gas of larger volume flow and smaller size smaller flow
The air quantity ratio of gas multifuel combustion, centre wind, Whirl deposite tank and axis stream wind is adjustable, it is characterised in that: the low-BTU gas accounts for
The 15% ~ 55% of combustion gas total amount of heat；The ratio of the low-BTU gas and high heat value gas calorific value is 1:5.
8. a kind of low heat value gas burning method according to claim 7, stream of the low-BTU gas in pipeline
Speed is 15 ~ 25 m/s, muzzle velocity is 20 ~ 35 m/s, and flow velocity of the high heat value gas in pipeline is 25 ~ 38 m/
S, muzzle velocity is 45 ~ 65m/s.
9. a kind of low heat value gas burning method according to claim 7, the centre wind, Whirl deposite tank and axis stream wind wind
The optimal proportion of amount is 1:39:60, adjustable range are as follows: ± 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711380248.5A CN109945212A (en) | 2017-12-20 | 2017-12-20 | A kind of low-heating-value gas burner and combustion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711380248.5A CN109945212A (en) | 2017-12-20 | 2017-12-20 | A kind of low-heating-value gas burner and combustion method |
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| CN109945212A true CN109945212A (en) | 2019-06-28 |
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ID=67004036
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| CN201711380248.5A Pending CN109945212A (en) | 2017-12-20 | 2017-12-20 | A kind of low-heating-value gas burner and combustion method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553263A (en) * | 2019-09-21 | 2019-12-10 | 襄阳中和机电技术有限公司 | five-channel gas burner with large energy-saving adjustment capability |
| CN111112299A (en) * | 2020-01-07 | 2020-05-08 | 上海锅炉厂有限公司 | Melting furnace for melting garbage fly ash and matched combustor thereof |
| CN114183758A (en) * | 2022-02-16 | 2022-03-15 | 浙江百能科技有限公司 | Device for burning wastes by low-calorific-value gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203893178U (en) * | 2014-03-18 | 2014-10-22 | 徐州能达燃烧控制工程有限公司 | High and low calorific value double-fuel combined burner |
| CN204535076U (en) * | 2014-12-10 | 2015-08-05 | 湖南华银能源技术有限公司 | A kind of heat smoke producer of lower heat of combustion coal pyrolysis gas |
| CN204786394U (en) * | 2015-06-26 | 2015-11-18 | 襄阳中和机电技术有限公司 | Effectively utilize low heat value gaseous fuel's multichannel combustor |
-
2017
- 2017-12-20 CN CN201711380248.5A patent/CN109945212A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203893178U (en) * | 2014-03-18 | 2014-10-22 | 徐州能达燃烧控制工程有限公司 | High and low calorific value double-fuel combined burner |
| CN204535076U (en) * | 2014-12-10 | 2015-08-05 | 湖南华银能源技术有限公司 | A kind of heat smoke producer of lower heat of combustion coal pyrolysis gas |
| CN204786394U (en) * | 2015-06-26 | 2015-11-18 | 襄阳中和机电技术有限公司 | Effectively utilize low heat value gaseous fuel's multichannel combustor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553263A (en) * | 2019-09-21 | 2019-12-10 | 襄阳中和机电技术有限公司 | five-channel gas burner with large energy-saving adjustment capability |
| CN111112299A (en) * | 2020-01-07 | 2020-05-08 | 上海锅炉厂有限公司 | Melting furnace for melting garbage fly ash and matched combustor thereof |
| CN111112299B (en) * | 2020-01-07 | 2023-10-31 | 上海锅炉厂有限公司 | Melting furnace for melting garbage fly ash |
| CN114183758A (en) * | 2022-02-16 | 2022-03-15 | 浙江百能科技有限公司 | Device for burning wastes by low-calorific-value gas |
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