CN211232866U - Double-induced-draft type fire tube combustion device - Google Patents
Double-induced-draft type fire tube combustion device Download PDFInfo
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- CN211232866U CN211232866U CN201922198392.8U CN201922198392U CN211232866U CN 211232866 U CN211232866 U CN 211232866U CN 201922198392 U CN201922198392 U CN 201922198392U CN 211232866 U CN211232866 U CN 211232866U
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Abstract
The utility model discloses a double-induced-draft fire tube combustion device, which comprises a primary air adjusting device, an air ejector, a backfire preventer, a secondary air adjusting device, a combustion fire tube and a water jacket furnace which are connected in sequence, wherein the secondary air adjusting device comprises fan blades, a secondary air door adjusting handle, a driving gear and a plurality of driven gears meshed with the driving gear, the driving gear is vertical to the axis of the driven gears, one fan blade is respectively and vertically arranged on the end surface of each driven gear, an air flow channel communicated with external air is formed between two adjacent fan blades, and the secondary air door adjusting handle is arranged on the central shaft of the driving gear; the utility model discloses can improve water jacket furnace heating efficiency, can reduce the pollution of burning back flue gas to the air, also can save the cost of crude oil heating. Meanwhile, the secondary air adjusting device adjusts the gear set through the secondary air door adjusting handle, and then drives the fan blades to be linked through the gear set, so that the transmission precision is high, and the service life of the fan blades can be effectively prolonged relative to the direct adjustment of the fan blades.
Description
Technical Field
The utility model relates to a petroleum processing handles technical field, concretely relates to two induced air formula firetube burner.
Background
In the oil production industry, the oil just produced needs to be heated by using a water jacket furnace, which is usually operated by inserting an open fire tube into the water jacket furnace, and an air inlet is arranged around the fire tube, so that air and fuel required for combustion are provided. The working mode causes uneven mixing of sleeve air and uneven distribution of temperature field, thus causing lower efficiency and waste of fuel.
Chinese patent CN 2081046U discloses a novel longitudinal jet secondary induced draft type full fire gas oven cooking range. The novel cooking range has the advantages that the central energy secondary induced air and gas supplementing combustion body is additionally arranged, the combustion cover which is provided with the vertical seam-shaped combustion ring as the main fire area and the thin combustion hole as the auxiliary fire area at the central part is assembled, the trumpet-shaped gas air injection mixing pipe and the secondary induced air and gas supplementing combustion body are sealed and insulated by the refractory fiber pad, and the annular pressing ring and the bolt are used for fastening and combining, so that the novel cooking range is even in gas supply, high in secondary induced air and gas supplementing combustion-supporting quantity, sufficient in combustion, high in heat value, small in heat loss, gas-saving and energy-saving, harmful gas in smoke is remarkably reduced, and single fire is changed into inside and outside full fire. But the size of the tuyere in the patent can not be adjusted, and the problem of uneven combustion still exists.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's not enough, provide a fire tube burner of two induced air formulas of simple structure easy operation, water jacket stove are efficient, its technical scheme is:
a double-induced-draft fire tube combustion device comprises an air ejector, wherein the air ejector comprises an air inlet section, an air suction contraction section and an air mixing section which are integrally formed, and further comprises a primary air adjusting device, a backfire preventer, a secondary air adjusting device, a combustion fire tube and a water jacket furnace, the primary air adjusting device is installed at an inlet of the air inlet section of the air ejector, an outlet of the air mixing section of the air ejector is connected with the backfire preventer, an outlet of the backfire preventer is connected with the combustion fire tube, and the combustion fire tube extends into the water jacket furnace;
the overgrate air adjusting device comprises fan blades, an overgrate air door adjusting handle, a driving gear and a plurality of driven gears meshed with the driving gear, wherein the driving gear is vertical to the axis of the driven gears, one fan blade is respectively and vertically arranged on the end surface of each driven gear, an air flow channel communicated with external air is formed between every two adjacent fan blades, the outer edges of the fan blades are in contact with the inner wall of an external frame of the overgrate air adjusting device, and the overgrate air door adjusting handle is arranged on the central shaft of the driving gear;
the secondary air adjusting device is installed at an inlet of the water jacket furnace, a driving gear central shaft of the secondary air adjusting device is sleeved on the outer surface of the combustion fire tube, a driven gear central shaft is vertically installed on the outer wall of the combustion fire tube, and the air flow channel is communicated with an inner cavity of the water jacket furnace.
Furthermore, the one end that burning firetube kept away from overgrate air adjusting device is equipped with a plurality of flame holes that have the flange, the flame hole includes main flame hole and steady flame hole, main flame hole position in the flame hole center, steady flame hole include to the slant passageway of flame hole outer wall direction slope and with the vertical passageway of slant passageway intercommunication, steady flame hole slant passageway bottom with the lateral wall intercommunication of main flame hole, steady flame hole vertical passageway with main flame hole is parallel.
Furthermore, the cross sections of the main fire hole and the flame stabilizing hole are both circular.
Further, a plurality of flame stabilizing holes are arranged around each main fire hole at equal intervals.
Further, the diameter of the flame stabilizing hole is smaller than that of the main fire hole.
Further, the diameter of the oblique channel is smaller than that of the longitudinal channel.
Further, a wind adjusting device includes center pin, fixed flabellum, rotatable flabellum and a wind air door adjustment handle, fixed flabellum with rotatable flabellum is formed by two fan-shaped blade amalgamations, fixed flabellum with rotatable flabellum is not in a plane to pass through in two fan-shaped blade amalgamations the center pin concatenates together, fixed flabellum is fixed on the center pin, a wind air door adjustment handle locates on the rotatable flabellum.
Furthermore, the secondary air damper adjusting handle is a plurality of long cylinders which are annularly arranged on the central shaft of the driving gear.
Furthermore, the air suction contraction section is of a horn mouth shape, the pipe diameter of one side close to the air inlet section is larger than that of one side close to the air mixing section, and a nozzle is arranged on one side close to the air inlet section.
Compared with the prior art, the utility model has the advantages of it is following: the utility model discloses a two induced air firetube burner, sleeve pipe gas homogeneous mixing primary air rethread fire pipe get into the water jacket stove in air ejector, open the overgrate air import on the water jacket stove, such design can come reasonable change temperature field and change the combustion method of sleeve pipe gas through the volume of reasonable regulation overgrate air to improve the heating efficiency of water jacket stove, can reduce the flue gas after the burning to the pollution of air, also can save the cost of crude oil heating. Meanwhile, the secondary air adjusting device adjusts the gear set through the secondary air door adjusting handle and then drives the fan blades to be linked through the gear set, the transmission precision is high, and the service life of the fan blades can be effectively prolonged compared with the traditional method for directly adjusting the fan blades.
Drawings
FIG. 1 is a sectional view of the present invention;
FIG. 2 is a sectional view of the fire hole structure of the present invention;
FIG. 3 is a view of the primary air door of the present invention;
FIG. 4 is a secondary air door of the present invention;
in the figure: 1-sleeve gas inlet, 2-primary air adjusting device, 3-nozzle, 4 air suction contraction section, 5-air inlet section, 6-air mixing section, 7-tempering preventing device, 8-secondary air adjusting device, 9-combustion fire tube, 10-water jacket furnace, 11-fire hole, 2-1-rotatable fan blade, 2-2 primary air damper adjusting handle, 2-3 fixed fan blade, 2-4-central shaft, 8-1-secondary air damper adjusting handle, 8-2-fan blade, 8-3-driving gear, 8-4-driven gear, 11-1-main fire hole, 11-2-flame stabilizing hole, 11-3-oblique channel and 11-4-longitudinal channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It should be noted that all directional indications (such as up, down, left, right, front, and back … …) in the embodiments of the present invention are limited to relative positions on a given view, not absolute positions.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Example 1
Referring to fig. 1, 3 and 4, the double-induced-air type fire tube combustion device comprises an air ejector, a primary air adjusting device 2, a backfire preventer 7, a secondary air adjusting device 8, a combustion fire tube 9 and a water jacket furnace 10, wherein the air ejector comprises an air inlet section 5, an air suction contraction section 4 and an air mixing section 6 which are integrally formed, the air suction contraction section 4 is of a bell mouth shape, the pipe diameter of one side close to the air inlet section is larger than that of one side close to the air mixing section, and a nozzle 3 is arranged on one side close to the air inlet section;
the primary air adjusting device 2 comprises a central shaft 2-4, a fixed fan blade 2-3, a rotatable fan blade 2-1 and a primary air door adjusting handle 2-2, wherein the fixed fan blade 2-3 and the rotatable fan blade 2-1 are formed by splicing two fan-shaped blades, the fixed fan blade 2-3 and the rotatable fan blade 2-1 are not in the same plane and are connected in series through the central shaft 2-4 at the splicing position of the two fan-shaped blades, the fixed fan blade 2-3 is welded and fixed on the central shaft 2-4, the primary air door adjusting handle 2-2 is arranged on the rotatable fan blade 2-1, and the rotatable fan blade 2-1 can be driven to rotate relative to the central shaft 2-4 by rotating the primary air door adjusting handle 2-2, so that the size of the primary air door is adjusted; the primary air adjusting device 2 is installed at an inlet of an air inlet section 5 of the air ejector, an outlet of an air mixing section 6 of the air ejector is connected with a backfire preventer 7, an outlet of the backfire preventer 7 is connected with a combustion fire tube 9, and the combustion fire tube 9 extends into the water jacket furnace 10;
the overgrate air adjusting device 8 comprises fan blades 8-2, an overgrate air throttle adjusting handle 8-1, a driving gear 8-3 and a plurality of driven gears 8-4 meshed with the driving gear 8-3, wherein the driving gear 8-3 is vertical to the axis of the driven gear 8-4, one fan blade 8-2 is respectively and vertically arranged on the end surface of each driven gear 8-4, an air flow channel communicated with the outside air is formed between every two adjacent fan blades 8-2, the outer edge of each fan blade 8-2 is in contact with the inner wall of an outer frame of the overgrate air adjusting device 8, the overgrate air throttle adjusting handle 8-1 is arranged on the central shaft of the driving gear 8-3, and the overgrate air throttle adjusting handle 8-1 is 4 long cylinders welded in an annular mode or in threaded connection with the;
the secondary air adjusting device 8 is arranged at an inlet of the water jacket furnace 10, a driving gear central shaft of the secondary air adjusting device 8 and a driving gear 8-3 are integrally formed, the driving gear central shaft is hollow and sleeved on the outer surface of the combustion fire tube 9, a driven gear 8-4 central shaft is vertically arranged on the outer wall of the combustion fire tube 9, and an air flow channel is communicated with an inner cavity of the water jacket furnace 10.
The working process is as follows: the dehydrated dry casing air firstly enters a nozzle 3 through a casing air inlet 1 and then enters an air suction shrinkage pipe 4 of an air ejector, meanwhile, primary air enters the air ejector through a primary air adjusting device 2 and also enters the air suction shrinkage pipe 4 after passing through an air inlet section 5, and the primary air adjusting device 2 can adjust a rotatable fan blade 2-1 through a primary air door adjusting handle 2-2 to change the relative position of the rotatable fan blade 2-1 and a fixed fan blade 2-3, so that the size of a primary air door is adjusted; the primary air and the sleeve air are preliminarily mixed in the air suction contraction pipe 4 and then are fully mixed in the air mixing section 6, the fully mixed sleeve air and the primary air enter the combustion fire pipe 9 after passing through the tempering preventer 7, and the tempering preventer 7 has the function that if tempering occurs, the tempering preventer rapidly reduces the tempering temperature through a wire mesh so that the tempering temperature cannot reach the ignition point temperature required by combustion, and the fire is prevented from being burned back; the combustion fire tube 9 extends into the water jacket furnace 10, when the sleeve gas is combusted through the fire hole 11, secondary air supplements air through the secondary air adjusting device 8, the combustion supporting effect is achieved, and the combustion quality of the sleeve gas is improved; the driving gear 8-3 can be driven to rotate by adjusting the adjusting handle 8-1 of the secondary air door, so as to drive the driven gear 8-4 to link, and further drive the fan blade 8-2 to turn over at a certain angle relative to the central shaft of the driven gear 8-4, so as to adjust the size of the secondary air door; the advantage of dividing into two air is that the primary air can provide the oxygen content that gives full play to the sleeve pipe gas heat, and the overgrate air plays the combustion-supporting effect, is the supplementary measure that improves combustion quality, is the regulation passageway that improves combustion efficiency, mainly supplements oxygen to flame rear portion.
Through the series of operation modes, better combustion of sleeve gas can be realized, the efficiency of the water jacket furnace is improved, the pollution of flue gas after combustion to air can be reduced, and the cost of crude oil heating can be saved.
Example 2
Referring to fig. 1, 3 and 4, the double-induced-air type fire tube combustion device comprises an air ejector, a primary air adjusting device 2, a backfire preventer 7, a secondary air adjusting device 8, a combustion fire tube 9 and a water jacket furnace 10, wherein the air ejector comprises an air inlet section 5, an air suction contraction section 4 and an air mixing section 6 which are integrally formed, the air suction contraction section 4 is of a bell mouth shape, the pipe diameter of one side close to the air inlet section is larger than that of one side close to the air mixing section, and a nozzle 3 is arranged on one side close to the air inlet section;
the primary air adjusting device 2 comprises a central shaft 2-4, a fixed fan blade 2-3, a rotatable fan blade 2-1 and a primary air door adjusting handle 2-2, wherein the fixed fan blade 2-3 and the rotatable fan blade 2-1 are formed by splicing two fan-shaped blades, the fixed fan blade 2-3 and the rotatable fan blade 2-1 are not in the same plane and are connected in series through the central shaft 2-4 at the splicing position of the two fan-shaped blades, the fixed fan blade 2-3 is welded and fixed on the central shaft 2-4, the primary air door adjusting handle 2-2 is arranged on the rotatable fan blade 2-1, and the rotatable fan blade 2-1 can be driven to rotate relative to the central shaft 2-4 by rotating the primary air door adjusting handle 2-2, so that the size of the primary air door is adjusted; the primary air adjusting device 2 is installed at an inlet of an air inlet section 5 of the air ejector, an outlet of an air mixing section 6 of the air ejector is connected with a backfire preventer 7, an outlet of the backfire preventer 7 is connected with a combustion fire tube 9, and the combustion fire tube 9 extends into the water jacket furnace 10;
the overgrate air adjusting device 8 comprises fan blades 8-2, an overgrate air throttle adjusting handle 8-1, a driving gear 8-3 and a plurality of driven gears 8-4 meshed with the driving gear 8-3, wherein the driving gear 8-3 is vertical to the axis of the driven gear 8-4, one fan blade 8-2 is respectively and vertically arranged on the end surface of each driven gear 8-4, an air flow channel communicated with the outside air is formed between every two adjacent fan blades 8-2, the outer edge of each fan blade 8-2 is in contact with the inner wall of an outer frame of the overgrate air adjusting device 8, the overgrate air throttle adjusting handle 8-1 is arranged on the central shaft of the driving gear 8-3, and the overgrate air throttle adjusting handle 8-1 is 4 long cylinders welded in an annular mode or in threaded connection with the;
the secondary air adjusting device 8 is arranged at an inlet of the water jacket furnace 10, a driving gear central shaft of the secondary air adjusting device 8 and a driving gear 8-3 are integrally formed, the driving gear central shaft is hollow and sleeved on the outer surface of the combustion fire tube 9, a driven gear 8-4 central shaft is vertically arranged on the outer wall of the combustion fire tube 9, and an air flow channel is communicated with an inner cavity of the water jacket furnace 10.
Referring to fig. 2, on the basis of the structure, one end of the combustion fire tube 9, which is far away from the secondary air adjusting device 8, is provided with a plurality of fire holes 11 with flanges, each fire hole 11 comprises a main fire hole 11-1 and a flame stabilizing hole 11-2, the main fire hole 11-1 is positioned in the center of the fire hole 11, each flame stabilizing hole 11-2 comprises an inclined channel 11-3 inclined towards the outer wall of the fire hole and a longitudinal channel 11-4 communicated with the inclined channel, the bottom of the inclined channel 11-3 of each flame stabilizing hole is communicated with the side wall of the main fire hole 11-1, and the longitudinal channel 11-4 of each flame stabilizing hole is parallel to the main fire hole 11-1. The flanged fire hole is more complicated than the flangeless manufacturing process, but the supply of secondary air and cooling of the fire hole is better than without the flange. The flame stabilizing holes 11-2 have the effects that when sleeve gas with high flame propagation speed is combusted, the resistance of the flame stabilizing holes 11-2 is high, the backfire of the main flame holes 11-1 can be prevented, when the flame propagation speed is low, the flame stabilizing holes 11-2 cannot be ignited, meanwhile, the formed auxiliary flame heats the root of the main flame, and the capability of preventing the main flame from being ignited is improved.
Example 3
Referring to fig. 1, 3 and 4, the double-induced-air type fire tube combustion device comprises an air ejector, a primary air adjusting device 2, a backfire preventer 7, a secondary air adjusting device 8, a combustion fire tube 9 and a water jacket furnace 10, wherein the air ejector comprises an air inlet section 5, an air suction contraction section 4 and an air mixing section 6 which are integrally formed, the air suction contraction section 4 is of a bell mouth shape, the pipe diameter of one side close to the air inlet section is larger than that of one side close to the air mixing section, and a nozzle 3 is arranged on one side close to the air inlet section;
the primary air adjusting device 2 comprises a central shaft 2-4, a fixed fan blade 2-3, a rotatable fan blade 2-1 and a primary air door adjusting handle 2-2, wherein the fixed fan blade 2-3 and the rotatable fan blade 2-1 are formed by splicing two fan-shaped blades, the fixed fan blade 2-3 and the rotatable fan blade 2-1 are not in the same plane and are connected in series through the central shaft 2-4 at the splicing position of the two fan-shaped blades, the fixed fan blade 2-3 is welded and fixed on the central shaft 2-4, the primary air door adjusting handle 2-2 is arranged on the rotatable fan blade 2-1, and the rotatable fan blade 2-1 can be driven to rotate relative to the central shaft 2-4 by rotating the primary air door adjusting handle 2-2, so that the size of the primary air door is adjusted; the primary air adjusting device 2 is installed at an inlet of an air inlet section 5 of the air ejector, an outlet of an air mixing section 6 of the air ejector is connected with a backfire preventer 7, an outlet of the backfire preventer 7 is connected with a combustion fire tube 9, and the combustion fire tube 9 extends into the water jacket furnace 10;
the overgrate air adjusting device 8 comprises fan blades 8-2, an overgrate air throttle adjusting handle 8-1, a driving gear 8-3 and a plurality of driven gears 8-4 meshed with the driving gear 8-3, wherein the driving gear 8-3 is vertical to the axis of the driven gear 8-4, one fan blade 8-2 is respectively and vertically arranged on the end surface of each driven gear 8-4, an air flow channel communicated with the outside air is formed between every two adjacent fan blades 8-2, the outer edge of each fan blade 8-2 is in contact with the inner wall of an outer frame of the overgrate air adjusting device 8, the overgrate air throttle adjusting handle 8-1 is arranged on the central shaft of the driving gear 8-3, and the overgrate air throttle adjusting handle 8-1 is 4 long cylinders welded in an annular mode or in threaded connection with the;
the secondary air adjusting device 8 is arranged at an inlet of the water jacket furnace 10, a driving gear central shaft of the secondary air adjusting device 8 and a driving gear 8-3 are integrally formed, the driving gear central shaft is hollow and sleeved on the outer surface of the combustion fire tube 9, a driven gear 8-4 central shaft is vertically arranged on the outer wall of the combustion fire tube 9, and an air flow channel is communicated with an inner cavity of the water jacket furnace 10.
Referring to fig. 2, on the basis of the structure, one end of the combustion fire tube 9, which is far away from the secondary air adjusting device 8, is provided with a plurality of fire holes 11 with flanges, each fire hole 11 comprises a main fire hole 11-1 and a flame stabilizing hole 11-2, the main fire hole 11-1 is positioned in the center of the fire hole 11, each flame stabilizing hole 11-2 comprises an inclined channel 11-3 inclined towards the outer wall of the fire hole and a longitudinal channel 11-4 communicated with the inclined channel, the bottom of the inclined channel 11-3 of each flame stabilizing hole is communicated with the side wall of the main fire hole 11-1, and the longitudinal channel 11-4 of each flame stabilizing hole is parallel to the main fire hole 11-1. The flanged fire hole is more complicated than the flangeless manufacturing process, but the supply of secondary air and cooling of the fire hole is better than without the flange. The flame stabilizing holes 11-2 have the effects that when sleeve gas with high flame propagation speed is combusted, the resistance of the flame stabilizing holes 11-2 is high, the backfire of the main flame holes 11-1 can be prevented, when the flame propagation speed is low, the flame stabilizing holes 11-2 cannot be ignited, meanwhile, the formed auxiliary flame heats the root of the main flame, and the capability of preventing the main flame from being ignited is improved.
On the basis of the structure, in order to better improve the flame stabilizing capability of the flame stabilizing holes and prevent the main flame holes from backfiring, the cross sections of the main flame holes 11-1 and the flame stabilizing holes 11-2 are both circular, a plurality of flame stabilizing holes 11-2 are arranged around each main flame hole 11-1 at equal intervals, the diameter of each flame stabilizing hole 11-2 is smaller than that of the corresponding main flame hole 11-1, and the diameter of each inclined channel 11-3 is smaller than that of each longitudinal channel 11-4.
The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the spirit of the present invention, and the changed contents still belong to the protection scope of the present invention.
Claims (9)
1. A double-induced-draft fire tube combustion device comprises an air ejector, wherein the air ejector comprises an air inlet section, an air suction contraction section and an air mixing section which are integrally formed, and is characterized by further comprising a primary air adjusting device, a tempering preventer, a secondary air adjusting device, a combustion fire tube and a water jacket furnace, wherein the primary air adjusting device is installed at an inlet of the air inlet section of the air ejector, an outlet of the air mixing section of the air ejector is connected with the tempering preventer, an outlet of the tempering preventer is connected with the combustion fire tube, and the combustion fire tube extends into the water jacket furnace;
the overgrate air adjusting device comprises fan blades, an overgrate air door adjusting handle, a driving gear and a plurality of driven gears meshed with the driving gear, wherein the driving gear is vertical to the axis of the driven gears, one fan blade is respectively and vertically arranged on the end surface of each driven gear, an air flow channel communicated with external air is formed between every two adjacent fan blades, the outer edges of the fan blades are in contact with the inner wall of an external frame of the overgrate air adjusting device, and the overgrate air door adjusting handle is arranged on the central shaft of the driving gear;
the secondary air adjusting device is installed at an inlet of the water jacket furnace, a driving gear central shaft of the secondary air adjusting device is sleeved on the outer surface of the combustion fire tube, a driven gear central shaft is vertically installed on the outer wall of the combustion fire tube, and the air flow channel is communicated with an inner cavity of the water jacket furnace.
2. The dual-induced-draft fire tube combustion device according to claim 1, wherein a plurality of flanged fire holes are formed in an end of the combustion fire tube, which is away from the secondary air adjusting device, the fire holes include a main fire hole and a flame stabilizing hole, the main fire hole is located in the center of the fire hole, the flame stabilizing hole includes an inclined channel inclined towards an outer wall of the fire hole and a longitudinal channel communicated with the inclined channel, a bottom of the inclined channel of the flame stabilizing hole is communicated with a side wall of the main fire hole, and the longitudinal channel of the flame stabilizing hole is parallel to the main fire hole.
3. The dual-induced-draft fire tube combustion device of claim 2, wherein the cross-sections of the main fire holes and the flame-stabilizing holes are circular.
4. The dual-induced-draft fire tube combustion device of claim 3, wherein a plurality of flame stabilizing holes are equidistantly disposed around each of the main flame holes.
5. The dual-induced-draft fire tube combustion device of claim 4, wherein the diameter of the flame-stabilizing hole is smaller than the diameter of the main fire hole.
6. The dual draft fire tube combustion device of claim 5 wherein the diameter of the angled passage is less than the diameter of the longitudinal passage.
7. The dual draft fire tube combustion device of claim 1 wherein said primary air damper assembly includes a central shaft, a fixed fan blade, a rotatable fan blade, and a primary air damper adjustment handle, said fixed fan blade and said rotatable fan blade are formed by two fan-shaped blades, said fixed fan blade and said rotatable fan blade are not in a plane and are serially connected together through said central shaft at the location where said two fan-shaped blades are joined, said fixed fan blade is fixed to said central shaft, and said primary air damper adjustment handle is disposed on said rotatable fan blade.
8. The dual-draft fire tube combustion device of claim 1 wherein the overfire air damper adjustment handle is a plurality of elongated cylinders annularly disposed on the central axis of the drive gear.
9. The dual draft fire tube combustion device of claim 1 wherein the air intake constriction is flared, the air intake section is larger in diameter on the side adjacent the air intake section than on the side adjacent the air mixing section, and a nozzle is provided on the side adjacent the air intake section.
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| CN201922198392.8U CN211232866U (en) | 2019-12-10 | 2019-12-10 | Double-induced-draft type fire tube combustion device |
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| CN201922198392.8U CN211232866U (en) | 2019-12-10 | 2019-12-10 | Double-induced-draft type fire tube combustion device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112128760A (en) * | 2020-08-24 | 2020-12-25 | 南京航空航天大学 | Jet pipe type burner with adjustable combustion mode |
| CN112944337A (en) * | 2019-12-10 | 2021-06-11 | 中国石油化工股份有限公司 | Double-induced-draft type fire tube combustion device |
| CN112944337B (en) * | 2019-12-10 | 2024-10-22 | 中国石油化工股份有限公司 | Double-induced air type fire tube combustion device |
-
2019
- 2019-12-10 CN CN201922198392.8U patent/CN211232866U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944337A (en) * | 2019-12-10 | 2021-06-11 | 中国石油化工股份有限公司 | Double-induced-draft type fire tube combustion device |
| CN112944337B (en) * | 2019-12-10 | 2024-10-22 | 中国石油化工股份有限公司 | Double-induced air type fire tube combustion device |
| CN112128760A (en) * | 2020-08-24 | 2020-12-25 | 南京航空航天大学 | Jet pipe type burner with adjustable combustion mode |
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