CN219775719U - Graded combustion equipment for gas boiler - Google Patents
Graded combustion equipment for gas boiler Download PDFInfo
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- CN219775719U CN219775719U CN202320517405.7U CN202320517405U CN219775719U CN 219775719 U CN219775719 U CN 219775719U CN 202320517405 U CN202320517405 U CN 202320517405U CN 219775719 U CN219775719 U CN 219775719U
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- gas
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- ignition
- fuel
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 97
- 239000007789 gas Substances 0.000 claims abstract description 88
- 239000000295 fuel oil Substances 0.000 claims abstract description 31
- 239000002737 fuel gas Substances 0.000 claims abstract description 28
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 11
- 238000010285 flame spraying Methods 0.000 claims abstract description 6
- 238000009826 distribution Methods 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 3
- 238000009851 ferrous metallurgy Methods 0.000 abstract description 2
- 239000003034 coal gas Substances 0.000 description 7
- 239000000446 fuel Substances 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 5
- 239000003921 oil Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Abstract
The utility model belongs to the technical field of ferrous metallurgy, and relates to a staged combustion device for a gas boiler, which comprises a stable combustion disc, a fuel oil ignition gun, a direct-fired gas ignition gun, a gas diversion chamber and a combustion-supporting air chamber; the combustion stabilizing disc is positioned at the front end, the gas diversion chamber connected with the blast furnace gas is arranged at the rear end, and the combustion supporting air chamber is positioned between the combustion stabilizing disc and the gas diversion chamber; the fuel oil ignition gun is arranged at the center of the stable combustion disc, and the direct-fired fuel gas ignition gun is positioned at one side of the fuel oil ignition gun; the stable combustion disk is uniformly distributed with an inner-middle-outer three-layer ignition unit around the fuel oil ignition gun, the middle-layer ignition unit and the outer-layer ignition unit comprise a plurality of independent fuel gas channels, and the rear end of the fuel gas flow dividing chamber gathers the fuel gas and then conveys the gathered fuel gas to the stable combustion disk through each fuel gas channel; the outside of each gas channel is sleeved with a combustion-supporting air channel communicated with the combustion-supporting air chamber, and each gas channel and the combustion-supporting air channel on the outside of each gas channel form an independent flame-spraying opening. The utility model can well realize the low nitrogen effect and stabilize the root flame.
Description
Technical Field
The utility model belongs to the technical field of ferrous metallurgy, and particularly relates to a staged combustion device for a gas boiler.
Background
The combustion equipment is an important equipment on the gas boiler, and the existing combustion equipment is as shown in fig. 1 and 2: comprising a fuel ignition gun 12 arranged on the burner; the fuel oil ignition gun is ignited by diesel oil, the blast furnace gas is used for conveying the gas to the burner to be used as fuel, and the combustion air of the burner is direct-current air and is conveyed to the stable combustion disc 11; however, the existing combustion system has the following problems:
1. with the requirements of clean, environment-friendly, safe and efficient production, the prior combustion equipment ignites the gas after igniting with diesel oil, so that ignition difficulty often occurs, and the ignition process burns incompletely to emit black smoke;
2. in the combustion process, the combustion air and the coal gas are improperly proportioned, the combustion state is unstable, the fire is suddenly extinguished and the like, so that NO is discharged from the flue gas X Under the condition of high pressure, the smoke emission is easy to reach the standard, and certain problems exist in the aspects of safety, environmental protection, efficiency and the like.
The present utility model has been made in view of this.
Disclosure of Invention
In order to solve the technical problems, the utility model adopts the basic conception of the technical scheme that:
the staged combustion device for the gas boiler comprises a stable combustion disc, a fuel oil ignition gun, a direct-fired fuel gas ignition gun, a fuel gas flow distribution chamber and a combustion-supporting air chamber;
the combustion stabilizing disc is positioned at the front end of the whole equipment, the gas diversion chamber connected with blast furnace gas is arranged at the rear end of the equipment, and the combustion supporting air chamber is positioned between the combustion stabilizing disc and the gas diversion chamber; the ignition end of the fuel oil ignition gun passes through the fuel gas diversion chamber and the combustion-supporting air chamber and is arranged at the center of the stable combustion disk, and the direct fuel gas ignition gun is positioned at one side of the fuel oil ignition gun;
the fuel-gas-stabilizing disc is uniformly distributed with three layers of ignition units, namely an inner layer ignition unit, a middle layer ignition unit and an outer layer ignition unit, which surround the fuel-gas ignition gun, wherein the middle layer ignition unit and the outer layer ignition unit comprise a plurality of independent fuel gas channels; the outside of each gas channel is sleeved with a combustion-supporting air channel communicated with a combustion-supporting air chamber, and each gas channel and the combustion-supporting air channel sleeved on the outside of each gas channel form an independent flame-spraying opening on the stable combustion disk.
As the preferable technical scheme, the combustion-supporting air chamber is divided into two independent parts, namely a direct-current air chamber and a rotational flow air chamber, and a direct-current air channel communicated with the direct-current air chamber is arranged on the outer side of the outer-layer gas pipeline so as to provide combustion-supporting air for the outer-layer ignition unit; the outer side of the middle layer gas pipeline is provided with a cyclone air channel communicated with the cyclone air chamber so as to provide combustion-supporting air for the middle layer ignition unit.
As the preferable technical scheme, a cyclone plate is arranged in the cyclone air channel and close to the cyclone air chamber, and combustion air of the cyclone air chamber can enter the cyclone air channel through the cyclone plate.
As a preferred technical scheme, the direct-fired coal gas ignition gun is positioned in the middle layer ignition unit.
As the preferable technical scheme, the fuel oil ignition gun is positioned on the inner layer ignition unit, and a plurality of ignition vent holes are distributed around the fuel oil ignition gun.
As an optimal technical scheme, each layer of ignition units in the stable combustion disk is provided with a wind mixing blade; the outer layer gas channel is flush with the direct current wind channel on the outer side and is positioned on the inner side of the outer layer mixing blade; the middle layer gas channel and the cyclone wind channel are flush with the middle layer mixing blade.
As a preferable technical scheme, the density of the middle layer and the inner layer mixed wind blades is higher than that of the outer layer mixed wind blades.
As the preferable technical proposal, the outer walls of the direct current air chamber and the cyclone air chamber are provided with air adjusting handles; the handle end of the air adjusting handle is positioned at the outer side of each air chamber, the tail end of the handle end is connected with an air adjusting valve plate positioned at the inlet of the air chamber, and the air adjusting valve plate can be driven to rotate by rotating the handle end within the range of 0-90 degrees, so that the air inlet quantity of direct-current air and rotational flow air is adjusted.
Compared with the prior art, the utility model has the following beneficial effects:
1. the middle layer and the outer layer ignition units of the stable combustion disk of the burner comprise a plurality of independent gas channels, the outside of each gas channel is sleeved with a combustion-supporting air channel communicated with a combustion-supporting air chamber, and each gas channel and the combustion-supporting air channel sleeved on the outside of each gas channel form an independent flame spraying port on the stable combustion disk, so that the full combustion and flame stabilization of gas are realized.
2. The combustion-supporting air chamber is divided into two independent parts, namely a direct-current air chamber and a rotational flow air chamber, and a direct-current air channel communicated with the direct-current air chamber is arranged on the outer side of a gas pipeline of the outer layer so as to provide combustion-supporting air for the outer layer ignition unit; the outer side of the gas pipeline of the middle layer is provided with a cyclone air channel communicated with the cyclone air chamber so as to provide combustion-supporting air for the middle layer ignition unit. The utility model adopts the arrangement mode of direct current-rotational flow-direct current staged combustion from inside to outside, divides the whole combustion equipment into two parts of central external mixed rotary combustion and peripheral multi-head internal mixed combustion, well realizes the low nitrogen effect and stabilizes the root flame.
3. The burner mainly adopts blast furnace gas as ignition fuel, can be directly ignited, is convenient and concise to ignite and realizes complete combustion of fuel; the fuel oil igniting gun takes fuel oil as a standby igniting mode so as to prevent abnormal ignition failure of the gas. The air blown out by the vent holes around the fuel oil ignition gun can prevent the gas and the combustion air in the boiler from flowing back along the burner, thereby playing a certain sealing effect.
4. The direct current wind chamber and the rotational flow wind chamber are both provided with wind adjusting handles, so that the wind inlet quantity of the direct current wind and the rotational flow wind is adjusted to change the flame shape, and stable flame shape and sufficient combustion are ensured.
The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings.
Drawings
In the drawings:
FIG. 1 is a front view of a prior art combustion apparatus;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a schematic view of a combustion apparatus according to the present utility model;
FIG. 4 is a side view of FIG. 3;
FIG. 5 is a schematic illustration of the application of the combustion apparatus of the present utility model to a combustion system.
In the figure: 1. a stable combustion disk; 2. a fuel oil ignition gun; 21. an oil inlet; 22. an air inlet; 3. a gas supply pipe; 4. a combustion-supporting air chamber; 41. a DC plenum; 411. a direct-current wind channel; 42. a cyclone air chamber; 421. a swirl wind channel; 5. a direct-fired gas ignition gun; 51. a gas inlet; 52. a combustion-supporting air inlet; 6. a gas diversion chamber; 7. a gas passage; 8. a flame spraying port; 9. a swirl plate; 10. an oil tank; 11. a vent hole; 12. an outer layer wind mixing blade; 13. middle layer wind mixing blade; 14. an air adjusting handle.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model.
The structure of the existing combustion apparatus is shown in fig. 1: comprises a fuel oil ignition gun 2 arranged at the axis of a blast furnace gas ignition device nozzle; a gas supply pipe 3 coaxially sleeved outside the fuel ignition gun; the stable combustion disc 1 is arranged at the front end of the fuel oil ignition gun 2; the combustion stabilizing disc 1 is communicated with the combustion supporting air chamber 4.
As shown in fig. 2 to 3, the present utility model discloses a staged combustion apparatus for a gas boiler, comprising a stable combustion disk 1, a fuel oil ignition gun 2, a direct fuel gas ignition gun 5, a gas diversion chamber 6 and a combustion-supporting air chamber 4;
the combustion stabilizing disc 1 is positioned at the front end of the whole equipment, the gas diversion chamber 6 connected with blast furnace gas is arranged at the rear end of the equipment, and the combustion supporting air chamber 4 is positioned between the combustion stabilizing disc 1 and the gas diversion chamber 6; the ignition end of the fuel oil ignition gun 2 passes through the fuel gas diversion chamber 6 and the combustion-supporting air chamber 4 and is arranged at the center of the stable combustion disk 1, and the direct-fired fuel gas ignition gun 5 is positioned at one side of the fuel oil ignition gun 2. The device mainly adopts blast furnace gas as ignition fuel, can be directly ignited, is convenient and concise to ignite and realizes complete combustion of fuel; the fuel oil igniting gun 2 takes fuel oil as a standby igniting mode to prevent abnormal ignition failure of the gas.
The stable combustion disk 1 is uniformly distributed with three layers of ignition units, namely an inner layer ignition unit, a middle layer ignition unit and an outer layer ignition unit, around the fuel oil ignition gun 2, wherein the middle layer ignition unit and the outer layer ignition unit comprise a plurality of independent fuel gas channels 7, and the rear end of the fuel gas flow distribution chamber 6 gathers fuel gas and then conveys the gathered fuel gas to the stable combustion disk 1 through each fuel gas channel 7; the outside of each gas channel 7 is sleeved with a combustion air channel 11 communicated with the combustion-supporting air chamber 4, and the gas outlet of each gas channel 7 and the air outlet of the combustion-supporting air channel 11 sleeved on the outside of the gas channel form an independent flame spraying port 8 on the stable combustion disk 1, so that the full combustion and flame stabilization of the gas are realized.
Specifically, the combustion-supporting air chamber 4 is divided into two independent parts, namely a direct-current air chamber 41 and a cyclone air chamber 42, and a direct-current air channel 411 communicated with the direct-current air chamber 41 is arranged on the outer side of the outer-layer gas pipeline so as to provide combustion-supporting air for the outer-layer ignition unit; a swirl air channel 421 communicated with the swirl air chamber 42 is arranged on the outer side of the middle-layer gas pipeline so as to provide combustion air for the middle-layer ignition unit; preferably, a cyclone plate 9 is arranged in the cyclone air channel 421 at a position close to the cyclone air chamber, and combustion air of the cyclone air chamber 42 can enter the cyclone air channel 421 through the cyclone plate 9; because the direct-fired coal gas ignition gun 5 is positioned in the middle layer ignition unit, combustion supporting through swirl wind is needed; the fuel oil ignition gun 2 is positioned in the inner layer ignition unit, a plurality of ignition vent holes 11 are annularly distributed around the outer side of the inner layer ignition unit, and direct-current combustion-supporting air is sprayed out through the vent holes 11 during ignition and is mixed with fuel oil at the outlet of the fuel oil ignition gun 2 to play a role in ignition combustion-supporting, and the vent holes 11 are not ventilated any more after ignition, but are used for supporting combustion through the middle layer ignition unit and the outer layer ignition unit.
Preferably, each layer of ignition units in the stable combustion disk is provided with a wind mixing blade; the air outlet of the outer layer gas channel is level with the air outlet of the direct current air channel, and is positioned at the position 8-10 cm inside the outer layer mixing fan blade 12, so that the gas in the outer layer gas channel and the direct current combustion air are mixed at the space inside the outer layer mixing fan blade 12 and then sprayed out; the air outlet of the middle-layer gas channel and the air outlet of the cyclone wind channel are flush with the middle-layer air mixing blade 13, so that the gas in the middle-layer gas channel and the combustion air thereof are mixed at the outlet of the middle-layer air mixing blade; the utility model adopts the arrangement mode of staged combustion for coal gas and combustion air, adopts the staged combustion technology for the mixed combustion of the middle layer and the outer layer, and well realizes the low nitrogen effect and stabilizes the root flame. When in combustion, the flame root is positioned at a distance of 4 cm to 5 cm from the flame stabilizing disc.
Preferably, the density of the middle layer and the inner layer mixing blades is higher than that of the outer layer mixing blades, so as to ensure that the fuel gas and the combustion air are fully mixed at the mixing blades when the outer mixing combustion is performed; the outer layer fuel gas and the combustion air are mixed in the stable combustion disk, so that the mixing effect is good due to the limitation of the inner space of the stable combustion disk, and the number of outer layer mixing blades can be properly reduced. Further preferably, the number of the outer layer air mixing blades is 12, the number of the outer layer flaming ports is 12, and each flaming port is arranged below the corresponding air mixing blade; the number of the middle layer and the inner layer air mixing blades is 20, and the number of the middle layer flaming ports is 4.
The outer walls of the direct current air chamber 41 and the cyclone air chamber 42 are respectively provided with an air adjusting handle 14; the handle end of the air regulating handle is positioned at the outer side of each air chamber, the tail end of the handle end is connected with an air regulating valve plate positioned at the inlet of the air chamber, and the air regulating valve plate can be driven to rotate by rotating the handle end within the range of 0-90 degrees, so that the air inlet quantity of direct-current air and rotational flow air is regulated to change the flame shape, and stable fire shape and full combustion are ensured. Specifically, when the air adjusting handle rotates to the 90-degree position, the air adjusting valve plate is completely opened, and when the air adjusting handle rotates to the 0-degree position, the air adjusting valve plate is completely closed; in this range, the amount of direct current wind can affect flame length; the air quantity of the cyclone air can influence the thickness of flame, and the flame is particularly regulated according to the shape of the flame in the boiler furnace observed by a flame camera.
A gas inlet 51 and a combustion air inlet 52 are arranged on the direct-fired coal gas ignition gun 5, one part of blast furnace gas enters the direct-fired coal gas ignition gun 5 through the gas inlet 51, the other part of blast furnace gas enters the gas flow distributing chamber 6, and redundant gas is diffused; the fuel oil ignition gun 2 is provided with an oil inlet 21 connected with the fuel oil tank 10 and an air inlet 22 connected with fuel oil ignition atomized wind. One part of the combustion air is communicated with the combustion air chamber 4, and the other part is communicated with the direct-fired coal gas ignition gun 5 through the combustion air inlet 52.
While the utility model has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the utility model and are intended to be within the scope of the utility model as claimed.
Claims (8)
1. The staged combustion device for the gas boiler comprises a stable combustion disc, a fuel oil ignition gun and is characterized by also comprising a direct-fired fuel gas ignition gun, a fuel gas flow distribution chamber and a combustion-supporting air chamber;
the combustion stabilizing disc is positioned at the front end of the whole equipment, the gas diversion chamber connected with blast furnace gas is arranged at the rear end of the equipment, and the combustion supporting air chamber is positioned between the combustion stabilizing disc and the gas diversion chamber; the ignition end of the fuel oil ignition gun passes through the fuel gas diversion chamber and the combustion-supporting air chamber and is arranged at the center of the stable combustion disk, and the direct fuel gas ignition gun is positioned at one side of the fuel oil ignition gun;
the fuel-gas-stabilizing disc is uniformly distributed with three layers of ignition units, namely an inner layer ignition unit, a middle layer ignition unit and an outer layer ignition unit, which surround the fuel-gas ignition gun, wherein the middle layer ignition unit and the outer layer ignition unit comprise a plurality of independent fuel gas channels; the outside of each gas channel is sleeved with a combustion-supporting air channel communicated with a combustion-supporting air chamber, and each gas channel and the combustion-supporting air channel sleeved on the outside of each gas channel form an independent flame-spraying opening on the stable combustion disk.
2. The staged combustion device for a gas boiler as claimed in claim 1, wherein the combustion-supporting plenum is divided into two independent parts of a direct current plenum and a cyclone plenum, and a direct current air passage communicated with the direct current plenum is provided outside the outer layer gas pipeline so as to provide combustion-supporting air for the outer layer ignition unit; the outer side of the middle layer gas pipeline is provided with a cyclone air channel communicated with the cyclone air chamber so as to provide combustion-supporting air for the middle layer ignition unit.
3. The staged combustion device for a gas boiler as claimed in claim 2, wherein a cyclone plate is provided in the cyclone air channel at a position close to the cyclone plenum, and combustion air of the cyclone plenum must enter the cyclone air channel through the cyclone plate.
4. The staged combustion device for a gas boiler as claimed in claim 1, wherein the direct fired gas firing gun is located in a middle layer firing unit.
5. The staged combustion device for a gas boiler as claimed in claim 1, wherein the fuel-fired gun is positioned in the inner-layer firing unit and a plurality of firing vents are circumferentially disposed around the fuel-fired gun.
6. The staged combustion device for a gas boiler as claimed in claim 1, wherein the stabilizing tray is provided with a mixing blade on each layer of ignition units inside-middle-outside; the outer layer gas channel is flush with the direct current wind channel on the outer side and is positioned on the inner side of the outer layer mixing blade; the middle layer gas channel and the cyclone wind channel are flush with the middle layer mixing blade.
7. The staged combustion device for a gas boiler as defined in claim 6, wherein the middle and inner layer mixing vanes are arranged at a density greater than the outer layer mixing vanes.
8. The staged combustion device for a gas boiler as claimed in claim 2, wherein air adjusting handles are provided at outer walls of the direct current air chamber and the cyclone air chamber; the handle end of the air adjusting handle is positioned at the outer side of each air chamber, the tail end of the handle end is connected with an air adjusting valve plate positioned at the inlet of the air chamber, and the air adjusting valve plate can be driven to rotate by rotating the handle end within the range of 0-90 degrees, so that the air inlet quantity of direct-current air and rotational flow air is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320517405.7U CN219775719U (en) | 2023-03-16 | 2023-03-16 | Graded combustion equipment for gas boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320517405.7U CN219775719U (en) | 2023-03-16 | 2023-03-16 | Graded combustion equipment for gas boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219775719U true CN219775719U (en) | 2023-09-29 |
Family
ID=88106522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320517405.7U Active CN219775719U (en) | 2023-03-16 | 2023-03-16 | Graded combustion equipment for gas boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219775719U (en) |
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2023
- 2023-03-16 CN CN202320517405.7U patent/CN219775719U/en active Active
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