CN211060108U - Gas and combustion-supporting gas premixing burner - Google Patents
Gas and combustion-supporting gas premixing burner Download PDFInfo
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- CN211060108U CN211060108U CN201921315799.8U CN201921315799U CN211060108U CN 211060108 U CN211060108 U CN 211060108U CN 201921315799 U CN201921315799 U CN 201921315799U CN 211060108 U CN211060108 U CN 211060108U
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Abstract
The utility model relates to a gas and combustion-supporting gas premixing burner, which comprises an ignition burner, a high calorific value gas channel, a combustion-supporting gas channel, a low calorific value gas channel and a combustion channel; the combustion channel is positioned at the front end of the combustion-supporting gas channel, the combustion channel and the combustion-supporting gas channel are communicated in front and back, an air inlet disc is arranged in the combustion channel, and the combustion channel is divided into a combustion area and a mixing area by the air inlet disc; the combustion-supporting gas channel is nested at the periphery of the high-calorific-value gas channel, and the rear end of the combustion-supporting gas channel seals the relatively high-calorific-value gas channel through a sealing end plate; the low-calorific-value gas channel is nested at the periphery of the combustion-supporting gas channel, the front end and the rear end of the low-calorific-value gas channel are respectively sealed relative to the combustion-supporting gas channel through the sealing end plates, the pipe wall of the combustion-supporting gas channel is provided with an air inlet through hole, so that the low-calorific-value gas enters the combustion-supporting gas channel from outside to inside, the combustion-supporting gas enters the combustion channel along with the low-calorific-value gas, is mixed in the mixing zone and then is input into the combustion zone through the air inlet disc, the full combustion of fuel.
Description
Technical Field
The utility model relates to a ignition formula nozzle, concretely relates to gas, combustion-supporting gas mix formula nozzle in advance.
Background
The tundish is an important production device of steel production enterprises, receives molten steel poured from a ladle, and then distributes the molten steel to each crystallizer through a tundish nozzle. The tundish is provided with a gas burner, and the baking tundish is used for maintaining the temperature of the molten steel in the tundish.
The patent application with publication number CN109277556A discloses a dual-purpose tundish roaster burner, which comprises a cylindrical burner body, wherein the front end of the burner body is open, and the rear end of the burner body is closed by an end plate; the end plate is provided with an air inlet; the end plate is connected with a three-way pipe, and a threaded sleeve and a screw matched with the threaded sleeve are fixed in the three-way pipe; the screw rod is coaxial with the burner body; a conical valve core is fixed at the front end of the screw rod and is positioned in the air inlet; the screw and the valve core are provided with axial through holes which are mutually communicated and can reach the inside of the burner body; the side wall of the burner body is provided with a plurality of air inlets. The dual-purpose tundish roaster burner with the structure can switch fuel between natural gas and converter gas. And because the heat values of the two fuel gases are greatly different, the air distribution of the different fuel gases can be adjusted to bake the fuel gases according to the optimal air-fuel ratio. In the technology, natural gas and coal gas are mutually switched and cannot be combusted simultaneously, and particularly, when the coal gas is combusted, the natural gas cannot supplement the coal gas; in addition, the mixing time of air and gas is short, and coal gas easily stays at the upper part of the gas burner, so that firepower fluctuation and safety risk exist.
In order to protect the ignition controller, the ignition controller is independently installed in the ignition box, the ignition box is connected to the main control cabinet, and the ignition control of the burner is inflexible.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a gas and combustion-supporting gas premixing burner which improves the mixing effect of the gas and the combustion-supporting gas, realizes the mixed combustion of a plurality of gases and widens the application range of the burner; and the ignition device is integrated on the burner, so that the integration degree of the burner and the use safety after integration are improved.
The utility model provides a technical scheme that above-mentioned problem adopted does: a gas and combustion-supporting gas premixing burner comprises an ignition burner, a high-calorific-value gas channel, a combustion-supporting gas channel, a low-calorific-value gas channel and a combustion channel; the combustion channel is positioned at the front end of the combustion-supporting gas channel, the combustion channel and the combustion-supporting gas channel are coaxially arranged and are communicated in the front and back directions, an air inlet disc is arranged in the combustion channel, and the combustion channel is divided into a front combustion area and a rear mixing area by the air inlet disc; the ignition burner axially penetrates through the high-calorific-value gas channel, a flame nozzle at the end part of the ignition burner extends to the combustion area, an end cap is arranged at the front end of the high-calorific-value gas channel, the flame nozzle is positioned in the end cap, and the rear end of the high-calorific-value gas channel is sealed relative to the ignition burner through a sealing end plate; the combustion-supporting gas channel is nested at the periphery of the high-calorific-value gas channel, and the rear end of the combustion-supporting gas channel seals the relatively high-calorific-value gas channel through a sealing end plate; the low-calorific-value gas channel is nested at the periphery of the combustion-supporting gas channel, the front end and the rear end of the low-calorific-value gas channel are respectively sealed relative to the combustion-supporting gas channel through sealing end plates, an air inlet through hole is formed in the pipe wall of the combustion-supporting gas channel, so that low-calorific-value gas enters the combustion-supporting gas channel from outside to inside, and the combustion-supporting gas enters the combustion channel along with the low-calorific-value gas, is mixed in the mixing area and then is input into the combustion area through the air inlet.
Preferably, the end cap is clamped on the air inlet disc, and a high-calorific-value gas outlet hole is formed in the end cap to enable the high-calorific-value gas channel to be communicated with the combustion zone. The high calorific value gas and the low calorific value gas can be used simultaneously to form a combustion mode of premixing the low calorific value gas and externally mixing the high calorific value gas, and the combustion mode can effectively control the flame rigidity, the flame combustion length and the flame jet speed.
Optionally, the combustion-supporting gas channel is flanged to the combustion channel.
Preferably, the air inlet disc is provided with a plurality of inclined holes distributed in a radial shape.
Optionally, the air inlet through hole is an inclined hole, and an included angle between the inclined hole and the radial direction is more than or equal to 50 degrees.
Optionally, a high-calorific-value gas inlet pipe is arranged on the pipe wall of the high-calorific-value gas channel, a combustion-supporting gas inlet pipe is arranged on the pipe wall of the combustion-supporting gas channel, and a low-calorific-value gas inlet pipe is arranged on the pipe wall of the low-calorific-value gas channel.
This application adopts integrated form ignition nozzle, with ignition controller and ignition box integration in an organic whole, installs in ignition passageway rear end, direct access main control cabinet. Because of nozzle main part operational environment temperature is higher, the fragile ignition controller in nozzle top is arranged in to the ignition box, and combustion air (cold air) that this application will ignite the nozzle and use lets in inclosed ignition box, cools off the ignition controller in to the ignition box through the cold air. The concrete structure is as follows:
the integrated ignition burner comprises an ignition channel, an ignition rod, an ignition gas channel, an ignition box and an ignition controller, wherein the ignition rod and the ignition gas channel are arranged inside the ignition channel, the ignition box is arranged at the rear end of the ignition channel and communicated with the ignition box, an ignition air inlet is formed in a box body of the ignition box, the ignition rod is connected with the ignition controller, and the ignition gas channel outwards penetrates out of the ignition box.
Furthermore, a fire-resistant plate made of flame-retardant materials is arranged at the rear end of the ignition channel, the ignition box is fixed on the fire-resistant plate, and the arrangement further reduces the temperature of the ignition controller in use and ensures the service life of the ignition system.
Compared with the prior art, the utility model has the advantages of:
the combustion efficiency of the burner is improved by promoting the sufficient combustion of the fuel by using a mode of mixing the combustion-supporting gas and the fuel gas before combustion, and the combustion mode is particularly suitable for the combustion of low-heating-value fuel gas such as coal gas.
Wherein: (1) the retention time of combustion-supporting gas and fuel gas at the upper part of the burner is reduced by using a mode of feeding fuel gas through the inclined holes, and the safety of the burner is improved; (2) the method adopts a mode of mixed combustion of a plurality of fuel gases including low-calorific value fuel gas and high-calorific value fuel gas, and widens the application range of the burner; (3) the integrated ignition burner is adopted, and the integrated degree of the burner is improved by combining the cooling of combustion air and the arrangement of the refractory plate, so that the integrated ignition burner has the function of automatic ignition.
Drawings
Fig. 1 is a schematic structural diagram of a burner in an embodiment of the present invention;
FIG. 2 is a schematic structural view of an upper portion of the burner shown in FIG. 1;
FIG. 3 is a schematic structural view of the lower portion of the burner shown in FIG. 1.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1-3, the embodiment relates to a nozzle for a tundish, which comprises an integrated ignition nozzle 1, a natural gas channel 2, a combustion air channel 3, a gas channel 4 and a combustion channel 5, wherein a natural gas inlet pipe is arranged on the pipe wall of the natural gas channel 2, a combustion air inlet pipe is arranged on the pipe wall of the combustion air channel 3, and a gas inlet pipe is arranged on the pipe wall of the gas channel 4. The combustion channel 5 is positioned at the front end of the combustion-supporting air channel 3, the combustion-supporting air channel and the combustion-supporting air channel are coaxially arranged and communicated with each other in a front-back mode through flange connection, an air inlet disc 6 is arranged in the combustion channel 5, and the combustion channel 5 is divided into a front combustion area and a rear mixing area by the air inlet disc 6. The ignition burner axially penetrates through the natural gas channel 2, the flame nozzle at the end of the ignition burner extends to the combustion area, the end cap 13 is arranged at the front end of the natural gas channel 2, the end cap 13 is clamped on the air inlet disc 6, and the end cap 13 is provided with a natural gas outlet hole 14 so that the natural gas channel 2 is communicated with the combustion area. The flame nozzle is positioned in the end cap 13, and the rear end of the natural gas channel 2 is sealed relative to the ignition burner through a sealing end plate. The combustion-supporting air channel 3 is nested at the periphery of the natural gas channel 2, and the rear end of the combustion-supporting air channel 3 is sealed relative to the natural gas channel 2 through a sealing end plate. The gas channel 4 is nested at the periphery of the combustion air channel 3, the front end and the rear end of the gas channel 4 are respectively sealed relative to the combustion air channel 3 through sealing end plates, the pipe wall of the combustion air channel 3 is provided with an air inlet through hole, so that the gas enters the combustion air channel 3 from outside to inside, the combustion air enters the combustion channel 5 along with the gas, is mixed in the mixing area and then is input into the combustion area through the air inlet disc 6.
The air inlet disk 6 is provided with a plurality of inclined holes distributed in a radial shape, so that the mixed gas of combustion-supporting air and coal gas enters a combustion area in a rotational flow mode, and premixing is realized while air is fed.
Furthermore, the integrated ignition burner 1 in this embodiment includes an ignition channel 7, an ignition rod 8 and an ignition gas channel 11 which are arranged inside the ignition channel 7, an ignition box 9, and an ignition controller, where the ignition controller is arranged inside the ignition box 9, the ignition box 9 is arranged at the rear end of the ignition channel 7 and is communicated with the ignition channel 7, a cold air inlet 10 is arranged on a box body of the ignition box 9, the ignition rod 8 is connected with the ignition controller, and the ignition gas channel 11 outwards penetrates out of the ignition box 9. A fire-resistant plate 12 made of flame-retardant materials is arranged at the rear end of the ignition channel 7, and the ignition box 9 is fixed on the fire-resistant plate 12.
The ignition rod and the corresponding ignition controller are commercially available products.
The integrated ignition burner of the embodiment has the following characteristics:
1. adopt the mode of integrated ignition controller, with ignition controller and ignition box integration in an organic whole, install in the top of nozzle, direct access main control cabinet.
2. Because of the nozzle main part operational environment temperature is higher, the ignition control box is arranged in the nozzle top and is fragile, lets in combustion air (cold air) that the ignition nozzle used in inclosed ignition control box, uses cold air to cool off the ignition box.
3. A special fire-resistant backing plate made of heat-resistant material is arranged below the ignition control box, so that the temperature of the ignition control box in use is further reduced, and the service life of the ignition system is ensured
Description of premixed combustion method of the present embodiment:
because the combustion efficiency is low and the combustion flame is unstable when low-calorific-value fuel gas such as coal gas and the like is mixed and combusted with air, in order to improve the combustion efficiency and the combustion effect of the low-calorific-value fuel gas such as converter coal gas, blast furnace coal gas and the like, the patent adopts a combustion mode of premixing the coal gas (the low-calorific-value fuel gas) and the air; under general conditions, the pipe network pressure of low heat value fuel gas is lower than combustion-supporting air pressure, and in order to prevent coal gas from flowing backwards, the patent adopts the mode as shown in the figure to set the air inlet and mixing mode: the air inlet is arranged above the coal gas inlet, so that the time of coal gas staying in the burner can be reduced, and the safety is improved; the gas is fed in an inclined hole mode, the axial included angle between the inclined hole and the pipe is more than or equal to 50 degrees, the gas can be ensured not to flow reversely, and the mixing of the gas and the air is promoted; the cyclone disc is arranged at the mixing end point, so that the coal gas and the air form rotational flow at the nozzle of the burner, and the mixing effect of the coal gas and the air is further improved.
Description of the present embodiment of setting the high heating value fuel gas inlet
1. Because the roaster has a plurality of uncertain factors in the using process, the temperature of the roasting end point and the roasting temperature rise speed are different. In the actual use process, some process requirements need the condition that the temperature rise speed is relatively fast and the end point temperature is relatively high, and the process requirements cannot be met by mixed combustion of single low-calorific-value fuel gas and air.
2. The high calorific value fuel gas and the low calorific value fuel gas can be used simultaneously to form a combustion mode of premixing the low calorific value fuel gas and externally mixing the high calorific value fuel gas, and the combustion mode can effectively control the flame rigidity, the flame combustion length and the flame injection speed.
Although the preferred embodiments of the present invention have been described in detail hereinabove, it should be clearly understood that modifications and variations of the present invention are possible to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a gas, combustion-supporting gas premix formula nozzle which characterized in that: the device comprises an ignition burner, a high-calorific-value gas channel, a combustion-supporting gas channel, a low-calorific-value gas channel and a combustion channel;
the combustion channel is positioned at the front end of the combustion-supporting gas channel, the combustion channel and the combustion-supporting gas channel are coaxially arranged and are communicated in the front and back directions, an air inlet disc is arranged in the combustion channel, and the combustion channel is divided into a front combustion area and a rear mixing area by the air inlet disc;
the ignition burner axially penetrates through the high-calorific-value gas channel, a flame nozzle at the end part of the ignition burner extends to the combustion area, an end cap is arranged at the front end of the high-calorific-value gas channel, the flame nozzle is positioned in the end cap, and the rear end of the high-calorific-value gas channel is sealed relative to the ignition burner through a sealing end plate;
the combustion-supporting gas channel is nested at the periphery of the high-calorific-value gas channel, and the rear end of the combustion-supporting gas channel seals the relatively high-calorific-value gas channel through a sealing end plate;
the low-calorific-value gas channel is nested at the periphery of the combustion-supporting gas channel, the front end and the rear end of the low-calorific-value gas channel are respectively sealed relative to the combustion-supporting gas channel through sealing end plates, an air inlet through hole is formed in the pipe wall of the combustion-supporting gas channel, so that low-calorific-value gas enters the combustion-supporting gas channel from outside to inside, and the combustion-supporting gas enters the combustion channel along with the low-calorific-value gas, is mixed in the mixing area and then is input into the combustion area through the air inlet.
2. The gas and combustion-supporting premixed burner as claimed in claim 1, wherein: the combustion-supporting gas channel is connected with the combustion channel through a flange.
3. The gas and combustion-supporting premixed burner as claimed in claim 1, wherein: the air inlet disk is provided with a plurality of inclined holes which are distributed in a radial shape.
4. The gas and combustion-supporting premixed burner as claimed in claim 1, wherein: the air inlet through hole is an inclined hole, and the included angle between the inclined hole and the radial direction is more than or equal to 50 degrees.
5. The gas and combustion-supporting premixed burner as claimed in claim 1, wherein: the high-calorific-value gas inlet pipe is arranged on the pipe wall of the high-calorific-value gas channel, the combustion-supporting gas inlet pipe is arranged on the pipe wall of the combustion-supporting gas channel, and the low-calorific-value gas inlet pipe is arranged on the pipe wall of the low-calorific-value gas channel.
6. The gas and combustion-supporting premixed burner as claimed in claim 1, wherein: the ignition burner is an integrated ignition burner.
7. The gas and combustion-supporting premixed burner as claimed in claim 6, wherein: the integrated ignition burner comprises an ignition channel, an ignition rod, an ignition gas channel, an ignition box and an ignition controller, wherein the ignition rod and the ignition gas channel are arranged inside the ignition channel, the ignition box is arranged at the rear end of the ignition channel and communicated with the ignition box, an ignition air inlet is formed in a box body of the ignition box, the ignition rod is connected with the ignition controller, and the ignition gas channel outwards penetrates out of the ignition box.
8. The gas-combustion premixed burner as claimed in claim 7, wherein: a fire-resistant plate made of flame-retardant materials is arranged at the rear end of the ignition channel, and the ignition box is fixed on the fire-resistant plate.
9. The gas and combustion-supporting premixed burner as claimed in claim 1, wherein: the end cap is clamped on the air inlet disc, and a high-calorific-value gas outlet hole is formed in the end cap to enable the high-calorific-value gas channel to be communicated with the combustion zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921315799.8U CN211060108U (en) | 2019-08-14 | 2019-08-14 | Gas and combustion-supporting gas premixing burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921315799.8U CN211060108U (en) | 2019-08-14 | 2019-08-14 | Gas and combustion-supporting gas premixing burner |
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| Publication Number | Publication Date |
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| CN211060108U true CN211060108U (en) | 2020-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921315799.8U Active CN211060108U (en) | 2019-08-14 | 2019-08-14 | Gas and combustion-supporting gas premixing burner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111947147A (en) * | 2020-08-10 | 2020-11-17 | 靖江博鑫柯曼燃烧器制造有限公司 | Double-preheating split type burner |
-
2019
- 2019-08-14 CN CN201921315799.8U patent/CN211060108U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111947147A (en) * | 2020-08-10 | 2020-11-17 | 靖江博鑫柯曼燃烧器制造有限公司 | Double-preheating split type burner |
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