CN211822365U - Adjustable low-nitrogen flat flame burner - Google Patents
Adjustable low-nitrogen flat flame burner Download PDFInfo
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- CN211822365U CN211822365U CN202020031953.5U CN202020031953U CN211822365U CN 211822365 U CN211822365 U CN 211822365U CN 202020031953 U CN202020031953 U CN 202020031953U CN 211822365 U CN211822365 U CN 211822365U
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Abstract
The utility model provides an adjustable low-nitrogen flat flame burner, which comprises an air distribution body, an air partition plate, an air distribution valve, a swirler, burner bricks, a primary gas spray pipe, a secondary gas spray pipe and a gas distribution valve, wherein the air inlet pipe is divided into two air inlet channels by the partition plate embedded into the air inlet pipe, the original air channel is divided into primary air and secondary air, and the air distribution valve is fixedly connected with the end part of the partition plate; an air distribution valve is arranged at the air inlet pipe to divide an original gas channel into primary gas and secondary gas, namely a primary gas spray pipe and a secondary gas spray pipe. The mixing proportion and the mixing amount of the primary air and the primary fuel gas and the mixing proportion and the mixing amount of the secondary air and the secondary fuel gas are adjusted through the air distribution valve and the fuel gas distribution valve, the problem that the NOx emission value of the low-nitrogen flat flame burner cannot be adjusted and controlled is solved, and therefore the NOx emission can reach the design requirement under different fuel gas components.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a low nitrogen type flat flame burner, especially an adjustable low nitrogen flat flame burner.
[ background of the invention ]
At present, in the domestic metallurgical and mechanical industries, a flat flame burner is required to be added at the position of a furnace top of a furnace kiln to heat the furnace, and the furnace top can be flexibly arranged at the position of the furnace top to supplement a heating blind spot at the position due to low power, so that the furnace top can be widely applied to large push steel heating furnaces and wide and thick plate heating furnaces.
Conventional flat flame burners have been accepted by the industry for their mature performance and are widely used in heating furnace top locations. Conventional flat flame burner simple structure, the form is mostly fuel from combustor center blowout, and the peripheral mode of leading to the air mixing adopts outer mixed formula diffusion formula burning, through the burner block that has the horn mouth, and the wall-attached burning is realized to whole gas mixture field. It features simple pipeline arrangement on furnace top, good flame shape, uniform heating and high flame temperature. The disadvantage is that the flame temperature is concentrated, resulting in a temperature that is too high, causing the flame to heat the nitrogen and oxygen of the air for chemical reaction, producing NOx, and ultimately leading to higher NOx emissions.
With the national emphasis on the NOx emission of industrial furnaces, more and more severe emission indexes are established, and the low-nitrogen type flat-flame burner slowly replaces the conventional flat-flame burner.
However, in practical applications, the low-nitrogen flat flame burner may have poor NOx control.
[ Utility model ] content
The to-be-solved technical problem of the utility model lies in providing an adjustable low nitrogen flat flame burner, the combustion volume of adjustable fuel and air, dispersion flame reduces the flame concentration degree, and then the lowering temperature to adjust NOx's emission, realize reducing NOx's emission.
The utility model discloses a realize like this: an adjustable low-nitrogen flat-flame burner comprises
The wind distribution body is provided with a first mounting hole and a plurality of second mounting holes at one end; an air inlet pipe is convexly arranged on one side of the air distribution body;
the air baffle comprises an annular plate and an annular pipe, and the annular plate is also convexly provided with a separating plate; the annular plate is also provided with third mounting holes, and the number of the third mounting holes is equal to that of the second mounting holes; one port of the annular pipe is vertically connected with the annular plate; the annular plate is fixedly connected in the air distribution body, and the separation plate is embedded into the air inlet pipe to separate the air inlet pipe into two air inlet channels;
an air distribution valve fixedly connected to an end of the partition plate;
a swirler;
the burner block is characterized in that one end of the burner block is provided with a plurality of gas through holes, a plurality of air through holes and a central through hole; the air distribution body is fixedly connected to the burner block; the swirler is fixedly connected to the burner block and coaxially arranged with the burner block, the swirler is positioned in the air distribution body, the air inlet pipe is communicated with an inlet of the swirler, and an outlet of the swirler is communicated with the central through hole; the air through hole is communicated with the air inlet pipe;
the outlet end of the primary gas spray pipe is provided with a first gas nozzle, the primary gas spray pipe is fixedly connected to the air distribution body, and the primary gas spray pipe sequentially penetrates through the first mounting hole, the inner ring of the annular plate, the inner cavity of the annular pipe and the swirler, and then the first gas nozzle extends into the central through hole;
the outlet end of the secondary gas spray pipe is provided with a second gas spray head, and the secondary gas spray pipe and the second mounting holes are equal in number; the secondary gas spray pipe sequentially penetrates through the second mounting hole and the third mounting hole, and then the second gas spray head is embedded into the gas through hole;
the number of the gas distribution valves is equal to that of the secondary gas spray pipes; the outlet of the gas distribution valve is connected to the inlet end of the secondary gas spray pipe in an airtight manner; and the inlets of all the gas distribution valves are communicated with the inlet end of the primary gas spray pipe in an airtight manner.
Further, the plurality of air through holes are uniformly arranged outside the central through hole in a circumferential mode.
Furthermore, the second mounting holes, the third mounting holes and the gas through holes are circumferentially arranged.
The utility model has the advantages that: the utility model discloses an adjustable low-nitrogen flat flame burner, including air distribution body, air baffle, air distribution valve, swirler, burner block, primary gas spray tube, secondary gas spray tube, and gas distribution valve, the division board imbeds the air intake pipe and separates into two inlet channels with the air intake pipe, divide into primary air and secondary air with former air passage, the air distribution valve is fixed connection in the tip of division board; an air distribution valve is arranged at the air inlet pipe to divide an original gas channel into primary gas and secondary gas, namely a primary gas spray pipe and a secondary gas spray pipe. The utility model discloses an air distribution valve and gas distribution valve adjust the mixing proportion and the mixing amount of mixing amount, secondary air and secondary gas of primary air and primary gas, compare prior art and have increased the controllability function, have solved the problem that low nitrogen type flat flame burner NOx thing emission value can't be adjusted and controlled to under different gas composition, realize that NOx thing discharges and can reach the design requirement.
[ description of the drawings ]
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a gas classification schematic diagram of an adjustable low-nitrogen flat flame burner according to the present invention.
Fig. 2 is an air classification schematic diagram of the adjustable low-nitrogen flat flame burner of the present invention.
Fig. 3 is a top view of the burner block of the present invention.
Fig. 4 is a top view of the air baffle of the present invention.
Fig. 5 is a plan view of the air distributor according to the present invention.
Fig. 6 is a top view of the gas pipe mounting flange according to the present invention.
Description of reference numerals:
the air distribution body 1, a first mounting hole 11, a second mounting hole 12, an air inlet pipe 13, air inlet channels 131 and 132, a second screw hole 14, an end flange 15 and a third screw hole 151;
the air separation plate 2, the ring plate 21, the ring pipe 22, the separation plate 211, the third installation hole 212,
a swirler 3;
the burner block 4, a gas through hole 41, an air through hole 42, a central through hole 43 and a fourth screw hole 44;
a primary gas nozzle 5, a first gas nozzle 51;
a secondary gas nozzle 6 and a second gas nozzle 61;
a gas distribution valve 7;
an air distribution valve 8;
the gas pipe mounting flange 9, first perforation 91, second perforation 92, first screw 93.
[ detailed description ] embodiments
Word interpretation: NOx is a nitrogen oxide, where X is a subscript, e.g., when X ═ 1, is NO; when X is 2, it is NO2。
The utility model discloses the general concept of implementation as follows:
firstly, dividing a primary air channel into primary air and secondary air, namely embedding the partition plate 211 into the air inlet pipe 13 to divide the air inlet pipe 13 into two air inlet channels 131 and 132;
second, the air distribution valve 8 is provided at the air inlet pipe 13, and the amount of generation of NOx can be controlled by controlling the distribution ratio of the primary air and the secondary air.
And thirdly, dividing the original gas channel into primary gas and secondary gas according to the requirements of the gas classification principle, namely a primary gas spray pipe 5 and a secondary gas spray pipe 6.
Fourthly, a fuel gas distribution valve 7 is arranged at a fuel gas inlet, and the generation amount of NOx can be controlled by controlling the distribution ratio of the primary fuel gas and the secondary fuel gas.
The working conditions used by each use unit in each industry are different, the gas components are different, the optimal proportion is finely adjusted through the mixing proportion and the mixing amount of air and gas, and the emission of NOx can reach the lowest value.
Therefore, the utility model discloses an air distribution valve 8 and gas distribution valve 7 adjust the mixing proportion and the mixing amount of mixing amount, secondary air and secondary gas of primary air and primary gas, compare prior art and increased the controllability function, solved the problem that low nitrogen type flat flame burner NOx thing emission value can't be adjusted and control to under different gas composition, realize that NOx thing discharges and can reach the designing requirement.
Please refer to fig. 1 to 6.
The utility model discloses an adjustable low nitrogen flat flame burner, include
As shown in fig. 5, one end of the air distribution body 1 is provided with a first mounting hole 11 and a plurality of second mounting holes 12; an air inlet pipe 13 is convexly arranged on one side of the air distribution body 1; in a specific embodiment, as shown in fig. 5 and 6, the primary gas nozzle 5 and the secondary gas nozzle 6 pass through the gas pipe mounting flange 9, the gas mounting flange 9 is provided with a first through hole 91 and a second through hole 92, the first through hole 91 is used for penetrating the primary gas nozzle 5, the second through hole 92 is used for penetrating the secondary gas nozzle 6, the gas pipe mounting flange 9 is further provided with a first screw hole 93, the air distribution body 1 is provided with a second screw hole 14, the first screw hole 93 and the second screw hole 14 are locked by screws, so that the primary gas nozzle 5 and the secondary gas nozzle 6 are fixedly mounted on the air distribution body 1, and each gas pipe and each mounting hole can be fixed in an embedding or welding manner.
In a specific embodiment, an end flange 15 is disposed at the bottom end of the air distribution body 1, a third screw hole 151 is disposed on the end flange 15, a fourth screw hole 44 is disposed at the top of the burner block 4, and the air distribution body 1 is fixed on the burner block 4 by screwing the third screw hole 151 and the fourth screw hole 44. The air baffle 2 can be welded to the burner block 4 or welded into the air distributor 1 to fix it. The swirler 3 may be screwed to the burner block 4 or fixed in the distributor 1 by screws or welding, which is not shown here.
The air baffle plate 2 comprises an annular plate 21 and an annular pipe 22, and the annular plate 21 is also convexly provided with a separating plate 211; the annular plate 21 is further provided with third mounting holes 212, and the number of the third mounting holes 212 is equal to that of the second mounting holes 12; one port of the annular tube 22 is vertically connected to the annular plate 21; the annular plate 21 is fixedly connected in the air distribution body 1, and the separation plate 211 is embedded in the air inlet pipe 13 to separate the air inlet pipe 13 into two air inlet channels 131 and 132; as shown in fig. 2, the primary air passes through the inner ring of the annular plate 21 from the air inlet channel 131 and then enters the swirler 3, and then enters the central through hole 43 of the burner block 4 from the swirler 3 to provide oxygen for the combustion of the primary gas nozzle 5. The secondary air passes through the outer side of the annular pipe 22 from the air inlet channel 132 and then enters the air through holes 42 of the burner block 4 to provide oxygen for the combustion of the secondary gas nozzle 5.
As shown in figure 1, the primary gas enters the central through hole 43 of the burner block 4 from the primary gas nozzle 5, the secondary gas enters the gas through hole 41 of the burner block 4 from the secondary gas pipe 6 and then enters the inner cavity of the burner block 4, and the outlet of the gas through hole 41 in the burner block 4 is positioned behind the central through hole 43, so that the primary gas and the secondary gas are dispersed, the concentration degree is reduced, and NO is reducedXThereby reducing NOXAnd (4) discharging.
An air distribution valve 8 for dividing air into primary air and secondary air and adjusting the ratio and amount of the two to achieve precise adjustment, the air distribution valve 8 being fixedly connected to an end of the partition plate 211;
a swirler 3; is used for rotating the air, so that the air and the primary gas are mixed more uniformly and are dispersed in the central through hole 43 of the burner block 4 more uniformly.
The burner block 4 is characterized in that one end of the burner block 4 is provided with a plurality of gas through holes 41, a plurality of air through holes 42 and a central through hole 43; the air distribution body 1 is fixedly connected with the burner block 4; the swirler 3 is fixedly connected to the burner block 4 and coaxially arranged with the burner block 4, meanwhile, the swirler 3 is positioned in the air distribution body 1, the air inlet pipe 13 is communicated with an inlet of the swirler 3, and an outlet of the swirler 3 is communicated with the central through hole 43; the air through hole 42 is communicated with the air inlet pipe 13;
a primary gas spray pipe 5, wherein a first gas spray nozzle 51 is arranged at the outlet end of the primary gas spray pipe 5, the primary gas spray pipe 5 is fixedly connected to the air distribution body 1, and the first gas spray nozzle 51 extends into the central through hole 43 after the primary gas spray pipe 5 sequentially passes through the first mounting hole 11, the inner ring of the annular plate 21, the inner cavity of the annular pipe 22 and the swirler 3;
the outlet end of the secondary gas spray pipe 6 is provided with a second gas spray head 61, and the number of the secondary gas spray pipes 6 is equal to that of the second mounting holes 12; the secondary gas spray pipe sequentially penetrates through the second mounting hole 12 and the third mounting hole 212, and then the second gas spray head is embedded into the gas through hole 41;
the number of the gas distribution valves 7 is equal to that of the secondary gas spray pipes 6; the outlet of the gas distribution valve 7 is connected with the inlet end of the secondary gas spray pipe 6 in an airtight manner; the inlets of all the gas distribution valves 7 are in gas-tight communication with the inlet end of the primary gas nozzle 5. The gas quantity entering the secondary gas spray pipe 6 is controlled by the gas distribution valve 7, and the regulation and control principle is as follows: the amount of the entering gas is certain, and the amount of the entering gas enters the secondary gas spray pipe 6 through adjustment, and the rest amount enters the central through hole 43 from the primary gas spray pipe 5, so that the gas amount and proportion of the primary gas spray pipe 5 and the secondary gas spray pipe 6 are controlled, and the purpose of accurate adjustment is achieved. Of course, in another embodiment, a gas distribution valve 7 may also be provided at the inlet end of the primary gas nozzle 5, which is not shown here, and the gas in the primary gas nozzle 5 is also regulated.
In the implementation, a preferred embodiment is as follows: the plurality of air through holes 42 are circumferentially and uniformly arranged outside the central through hole 43, so that the air is more uniform respectively.
The second mounting holes 12, the third mounting holes 212 and the gas through holes 41 are circumferentially arranged, so that the gas is more uniform.
Example (b):
the air distribution valve 8 and the gas distribution valve 7 may be implemented by existing ball valves, butterfly valves, distribution valves, or the like.
The burner block 4 and the air distribution body 1 are respectively provided with mounting flanges and are tightly connected by bolts and nuts;
the swirler 3 is arranged on a hole position 43 of a central through hole of the burner block 4 and is tightly connected with the air distribution body 1 by bolts and nuts;
the air partition plate 2 divides the interior of the air distribution body 1 into a primary air channel and a secondary air channel;
an air distribution valve 8 is arranged in the air distribution body 1, and the distribution proportion of primary air and secondary air can be adjusted;
the secondary gas spray pipe 6 is connected with the secondary gas spray head 61, then is connected with the gas distribution valve 6, is connected with the primary gas spray pipe 5, and is connected with the air distribution body 1 through a gas mounting flange 9;
the primary gas spray pipe 5 is connected with a primary gas spray head 51 and extends into the central through hole 43 of the burner block 4;
uniformly drilling gas through holes 41 with the number n (n is more than or equal to 3) on the burner block 4 to receive the insertion of a secondary gas nozzle 61;
the secondary gas spray pipe 6 is inserted into the air partition 2 and extends into the gas through holes 41 which are uniformly distributed on the circumference corresponding to the burner block 4.
The mounting position of the whole set of components is arranged on the furnace top of the industrial furnace after being assembled.
In the attached figure 1, after entering a burner interface, gas respectively enters a primary gas spray pipe 5 and n (n is more than or equal to 3) secondary gas spray pipes 6, the primary gas enters the primary gas spray pipe 5, is radially and rotatably sprayed out through a primary gas spray nozzle 51 and is mixed with primary air to generate a partial premixed combustion area, and at the moment, the proportion that the primary air amount is smaller than the primary gas amount is adopted, so that the primary gas combustion is inhibited because the primary gas amount is smaller;
the secondary gas enters the secondary gas pipe 6, the secondary gas nozzle 61 and the gas through hole 41 in the burner block 4 through the gas distribution valve 7, is finally sprayed out of the inside of the burner block 4 and enters the outside of the central premixed combustion area for mixed combustion again, and the secondary combustion is also inhibited because the gas concentration is diluted by the smoke generated by the partial premixed combustion area.
In fig. 1, the gas distribution valve 7 is used to adjust the amount of the secondary gas, thereby indirectly adjusting the amount of the mixture ratio of the primary gas and the secondary gas.
In the attached figure 2, air enters the air distribution valve 8 and is distributed into primary air and secondary air, the primary air enters the swirler 3 through the air partition plate 2, the generated rotating airflow enters the central through hole 43 of the burner block 4, is converged with primary gas and enters a central part premixing combustion area, the air amount is small at the moment, and the combustion of the primary gas is inhibited;
the secondary air enters the air distribution body 1 through the distribution valve, is sprayed out from the air through holes 42 in the burner block 4, enters the outside of the central part premixed combustion area for mixed combustion again, the oxygen concentration is diluted by the smoke generated in the central part premixed combustion area, and the secondary gas combustion is inhibited.
In fig. 2, an air distribution valve 8 is used to adjust the ratio of primary air to secondary air.
By adjusting the respective opening degrees of the air distribution valve 8 and the fuel gas distribution valve 7, the minimum value of NOx corresponding to each fuel under each working condition can be accurately adjusted, and the optimal performance of the low-nitrogen flat flame burner is fully exerted.
Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.
Claims (3)
1. An adjustable low-nitrogen flat flame burner is characterized in that: comprises that
The wind distribution device comprises a wind distribution body (1), wherein one end of the wind distribution body (1) is provided with a first mounting hole (11) and a plurality of second mounting holes (12); an air inlet pipe (13) is convexly arranged on one side of the air distribution body (1);
the air baffle plate (2), the said air baffle plate (2) includes annular plate (21) and annular tube (22), the said annular plate (21) also protrudes and has a dividing plate (211); the annular plate (21) is also provided with third mounting holes (212), and the number of the third mounting holes (212) is equal to that of the second mounting holes (12); one end opening of the annular pipe (22) is vertically connected with the annular plate (21); the annular plate (21) is fixedly connected into the air distribution body (1), and the separation plate (211) is embedded into the air inlet pipe (13) to separate the air inlet pipe (13) into two air inlet channels (131, 132);
an air distribution valve (8), wherein the air distribution valve (8) is fixedly connected to the end part of the separation plate (211);
a swirler (3);
the burner block (4), one end of the burner block (4) is provided with a plurality of gas through holes (41), a plurality of air through holes (42) and a central through hole (43); the air distribution body (1) is fixedly connected to the burner block (4); the swirler (3) is fixedly connected to the burner block (4) and coaxially arranged with the burner block, meanwhile, the swirler (3) is positioned in the air distribution body (1), the air inlet pipe (13) is communicated with an inlet of the swirler (3), and an outlet of the swirler (3) is communicated with the central through hole (43); the air through hole (42) is communicated with the air inlet pipe (13);
the primary gas spray pipe (5) is fixedly connected to the air distribution body (1), and the primary gas spray pipe (5) sequentially penetrates through the first mounting hole (11), the inner ring of the annular plate (21), the inner cavity of the annular pipe (22) and the swirler (3) and then the first gas spray head (51) extends into the central through hole (43);
the outlet end of the secondary gas spray pipe (6) is provided with a second gas spray nozzle (61), and the secondary gas spray pipe (6) and the second mounting hole (12) are equal in number; the secondary gas spray pipe sequentially penetrates through the second mounting hole (12) and the third mounting hole (212) and then the second gas spray head is embedded into the gas through hole (41);
the number of the gas distribution valves (7) is equal to that of the secondary gas spray pipes (6); the outlet of the gas distribution valve (7) is connected with the inlet end of the secondary gas spray pipe (6) in an airtight manner; the inlets of all the gas distribution valves (7) are in gas-tight communication with the inlet end of the primary gas nozzle (5).
2. The adjustable low-nitrogen flat-flame burner of claim 1, wherein: the plurality of air through holes (42) are uniformly arranged outside the central through hole (43) in a circumferential mode.
3. The adjustable low-nitrogen flat-flame burner of claim 1, wherein: the second mounting holes (12), the third mounting holes (212) and the gas through holes (41) are circumferentially arranged respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020031953.5U CN211822365U (en) | 2020-01-08 | 2020-01-08 | Adjustable low-nitrogen flat flame burner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020031953.5U CN211822365U (en) | 2020-01-08 | 2020-01-08 | Adjustable low-nitrogen flat flame burner |
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| CN211822365U true CN211822365U (en) | 2020-10-30 |
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| CN202020031953.5U Active CN211822365U (en) | 2020-01-08 | 2020-01-08 | Adjustable low-nitrogen flat flame burner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114183755A (en) * | 2021-11-23 | 2022-03-15 | 佛山市顺德区美的洗涤电器制造有限公司 | Combustion device and gas stove |
-
2020
- 2020-01-08 CN CN202020031953.5U patent/CN211822365U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114183755A (en) * | 2021-11-23 | 2022-03-15 | 佛山市顺德区美的洗涤电器制造有限公司 | Combustion device and gas stove |
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