CN218178880U

CN218178880U - Flue gas inner loop low-nitrogen gas burner

Info

Publication number: CN218178880U
Application number: CN202222702797.2U
Authority: CN
Inventors: 钟立平; 钟毓; 徐璐
Original assignee: Anhui Keli Thermal Energy Equipment Engineering Co ltd
Current assignee: Anhui Keli Thermal Energy Equipment Engineering Co ltd
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2022-12-30
Anticipated expiration: 2032-10-14

Abstract

The utility model relates to a low nitrogen gas burner of flue gas inner loop, include the casing and be located mixing tube in the casing, casing one side is provided with boiler body, mixing tube one side fixedly connected with air inlet shell, first one of air inlet shell with the mixing tube communicates with each other, and air inlet shell one side lower half is worn to be equipped with the gas intake pipe, the air inlet shell internal rotation is connected with the worm, and the fixed cover of worm outer peripheral face is equipped with the impeller, air inlet shell is close to one side inner wall of mixing tube and has been seted up and dodge the groove, dodges the groove part and extends to in the mixing tube, dodge to rotate between the roof in inslot diapire and the mixing tube and be connected with the driven lever. The utility model relates to a gas burner's technical field. The utility model discloses make and can drive the mixing rod rotation when the gas gets into the hybrid tube to make the abundant mixture of air and gas, prevent local high temperature from appearing when burning, improved furnace's life, and improved the abundant degree of burning of gas, reduced nitrogen oxide's emission.

Description

Flue gas inner loop low-nitrogen gas burner

Technical Field

The utility model belongs to the technical field of gas combustion ware's technique and specifically relates to a low nitrogen gas combustion ware of flue gas inner loop is related to.

Background

The gas burner is an important component of an industrial boiler, is a main device for converting fuel energy into heat energy, generates a large amount of nitrogen oxides when the gas burner is operated, and the nitrogen oxides are one of main pollutants of the atmosphere and are the main cause of PM2.5, so that a novel gas burner generating lower nitrogen oxides is required at present.

For example, chinese patent publication No. CN216244277U discloses a flue gas internal circulation dual-fuel low-nitrogen burner. The device's shell body tail end is connected with the air inlet pipeline, the spout device is connected to the shell body front end, the spout device stretches into in the furnace, the design of spout device front end has toper shrink cover, the inside circumference whirl board that sets up of spout device front end, the inside circumference equipartition of spout device front end has a plurality of gas spray guns, the shower nozzle of gas spray gun can the rotation regulation, be provided with the aviation baffle on the gas spray gun, the inside center of spout device front end sets up central fuel spray gun, the inside central gas spray gun that sets up of spout device front end. The utility model discloses a both can reduce nitrogen oxide and discharge, do not need flue gas extrinsic cycle pipeline and draught fan again, support the operation of dual fuel switch, simple structure occupies that the place space is little, and is with low costs.

This patent just discharges gas and air to the shell body in jointly, lets gas and air mix naturally, but in actual conditions, the difficult even mixture of gas and air, local high temperature appears easily when inhomogeneous gas mixture burns, leads to the temperature distribution inhomogeneous in the furnace, reduces furnace's life, and gas and air mix inhomogeneous also can cause the rising of nitrogen oxide emission.

SUMMERY OF THE UTILITY MODEL

According to the not enough of prior art existence, the utility model aims at providing a low nitrogen gas burner of flue gas inner loop has and makes gas and air mixing even, improves furnace's life, and reduces the effect of nitrogen oxide emission.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a low nitrogen gas burner of flue gas inner loop, includes the casing and is located hybrid tube in the casing, casing one side is provided with boiler body, hybrid tube one side fixedly connected with air inlet shell, first one of the shell that admits air with the hybrid tube communicates with each other, air inlet shell one side lower half is worn to be equipped with the gas intake pipe, the shell internal rotation that admits air is connected with the worm, the fixed cover of worm outer peripheral face is equipped with the impeller, the shell that admits air is close to one side inner wall of hybrid tube and has seted up and dodge the groove, dodge the groove part extend to in the hybrid tube, it is connected with the driven lever to dodge to rotate between inslot diapire and the internal roof of hybrid tube, the driven lever outer peripheral face is located it is equipped with the worm wheel to dodge the fixed cover of position in groove, the worm with the worm meshes mutually with the worm wheel, the fixed cover of driven lever outer peripheral face is equipped with a plurality of hybrid lever, air intake pipe is worn to be equipped with on one side.

Through adopting above-mentioned technical scheme, through the cooperation of worm, flabellum, worm wheel, driven lever and mixing arm, can drive the mixing arm when the gas gets into the hybrid tube and rotate to make the abundant mixture of air and gas, prevent local high temperature from appearing when the burning, improved furnace's life, and improved the abundant degree of burning of gas, reduced nitrogen oxide's emission.

The present invention may be further configured in a preferred embodiment as: the fixed cover of driven lever outer peripheral face is equipped with the guide block, the guide block outer peripheral face with the mixing tube laminating mutually, guide block bottom center department has seted up the guiding groove, first one has seted up a plurality of side channel in the guiding groove inside wall, a plurality of through-hole has been seted up to the side inslot roof.

Through adopting above-mentioned technical scheme, through the cooperation of guide block, guiding groove, side groove and through-hole, each position in the gas uniform diffusion to the mixing tube that makes the entering mixing tube, further improvement the mixed effect of gas and air.

The present invention in a preferred embodiment can be further configured to: and a smoke exhaust pipe penetrates through the top of the boiler body, and one end of the smoke exhaust pipe, which is far away from the boiler body, penetrates through the side wall of the shell and is communicated with the mixing pipe.

By adopting the technical scheme, through the arrangement of the smoke exhaust pipe, smoke generated after mixed combustion of gas and air is exhausted into the mixing pipe to participate in subsequent combustion, so that the flame temperature is controlled at a lower level, and the flame energy is insufficient to enable nitrogen in combustion air to react with oxygen to generate nitrogen oxide, thereby further reducing the generation of the nitrogen oxide.

The present invention may be further configured in a preferred embodiment as: the fixed cover of driven lever outer peripheral face is equipped with drive bevel gear, two mounts of the intraductal wall fixedly connected with of discharging fume are provided with the gangbar in discharging fume, the gangbar rotates and passes two mounts, and the driven bevel gear of gangbar one end fixedly connected with, driven bevel gear with drive bevel gear meshes mutually, the fixed cover of gangbar outer peripheral face is equipped with the flabellum.

Through adopting above-mentioned technical scheme, through the cooperation of drive bevel gear, driven bevel gear and flabellum, make the more efficient row of flue gas to in the mixing tube.

The present invention in a preferred embodiment can be further configured to: the inside wall that the shell of admitting air kept away from the hybrid tube sets up for the top slope is to the hybrid tube.

Through adopting above-mentioned technical scheme, the inside wall of keeping away from the hybrid tube through the air inlet shell is the directional hybrid tube setting of top slope, makes the gas flow rate increase gradually behind the entering air inlet shell, makes the rotation that worm and impeller can be stable.

The present invention in a preferred embodiment can be further configured to: the impeller portion is located within the avoidance slot.

Through adopting above-mentioned technical scheme, be located through the impeller part and dodge the inslot, the gas can only impact a part of impeller to make the rotation that the impeller can be more stable, and can not take place the reversal.

To sum up, the utility model discloses a following at least one useful technological effect:

1. through the cooperation of worm, flabellum, worm wheel, driven lever and mixing arm, can drive the mixing arm when the gas gets into the hybrid tube and rotate to make the abundant mixture of air and gas, prevent local high temperature from appearing when the burning, improved furnace's life, and improved the abundant degree of burning of gas, reduced nitrogen oxide's emission.

2. Through the cooperation of the smoke exhaust pipe, the driving bevel gear, the driven bevel gear and the fan blades, smoke generated after mixed combustion of gas and air can be exhausted into the mixing pipe to participate in subsequent combustion, smoke internal circulation is formed, the flame temperature is controlled at a low level, and the flame energy is insufficient to enable nitrogen in combustion air to react with oxygen to generate nitrogen oxides, so that the generation of the nitrogen oxides is further reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of the present embodiment;

FIG. 2 is a block diagram of the mixing tube and air intake housing of the present embodiment;

fig. 3 is an enlarged view of a portion a in fig. 2 according to the present embodiment.

In the figure, 1, a housing; 2. a mixing tube; 3. a boiler body; 4. an air inlet housing; 5. a gas inlet pipe; 6. a worm; 7. an impeller; 8. an avoidance groove; 9. a driven lever; 10. a worm gear; 11. a mixing rod; 12. an air inlet pipe; 13. a guide block; 14. a guide groove; 15. a side groove; 16. a through hole; 17. a smoke exhaust pipe; 18. a drive bevel gear; 19. a linkage rod; 20. a driven bevel gear; 21. and fan blades.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b):

referring to fig. 1 to 3, the utility model discloses a low nitrogen gas burner of flue gas inner loop, including casing 1 and the hybrid tube 2 that is located casing 1. The upper half portion is provided with combustion portion in the casing 1, and mixing pipe 2 top is provided with a plurality of gas shower nozzle, and gas shower nozzle blowout gas burns to combustion portion. The boiler body 3 is arranged on one side of the shell 1, the heat exhaust pipe is arranged between the top of the shell 1 and the boiler body 3 in a communicated mode, heat generated after combustion of combustion-supporting gas is exhausted into the boiler body 3 through the heat exhaust pipe, the introduction refers to the prior art, and the principle of the heat exhaust pipe is not introduced any more.

One side of the mixing pipe 2 is fixedly connected with an air inlet shell 4, and the upper half part of the air inlet shell 4 is communicated with the mixing pipe 2. The lower half part of one side of the air inlet shell 4 is provided with a gas inlet pipe 5 in a penetrating way, and gas enters the air inlet shell 4 through the gas inlet pipe 5. The gas inlet pipe 5 penetrates through the side wall of the shell 1.

A worm 6 is rotatably connected in the air inlet shell 4, and an impeller 7 is fixedly sleeved on the outer peripheral surface of the worm 6. The inner wall of one side of the air inlet shell 4 close to the mixing pipe 2 is provided with an avoiding groove 8, and the avoiding groove 8 partially extends into the mixing pipe 2. The gas flows into the mixing shell after entering the air inlet shell 4, and simultaneously blows to the impeller 7 to drive the impeller 7 to rotate, and the impeller 7 drives the worm 6 to rotate. The impeller 7 is partially positioned in the avoiding groove 8, so that the fuel gas can only blow to one side of the impeller 7, and the impeller 7 is prevented from rotating reversely or the two sides of the impeller 7 cannot rotate under the action of wind power.

Keep away and rotate between 8 interior diapalls of groove and the mixing tube 2 interior roof and be connected with driven lever 9, the fixed cover in position that the peripheral face of driven lever 9 is located keeps away groove 8 is equipped with worm wheel 10, worm 6 meshes with worm wheel 10 mutually. The worm 6 rotates to drive the worm wheel 10 to rotate, and the worm wheel 10 rotates to drive the driven rod 9 to rotate.

The fixed cover of 9 outer peripheral faces of driven lever is equipped with a plurality of mixing rod 11, and air intake pipe 12 wears to be equipped with in 2 one sides of hybrid tube, and the air passes through air intake pipe 12 and gets into hybrid tube 2, and air intake pipe 12 passes 1 lateral wall of casing, and air intake pipe 12 is located the 11 below of hybrid rod.

The inside wall that shell 4 admits air kept away from hybrid tube 2 sets up for top slope directional hybrid tube 2 for shell 4 admits air reduces from supreme inner space down gradually, thereby makes the gas velocity of flow increase gradually, and drive impeller 7 that can be stable rotates.

The peripheral surface of the driven rod 9 is fixedly sleeved with a guide block 13, and the guide block 13 is positioned below the air inlet pipe 12. The outer peripheral surface of the guide block 13 is attached to the inner wall of the mixing pipe 2, and the fuel gas cannot pass through the gap between the guide block 13 and the inner wall of the mixing pipe 2.

Guide groove 14 has been seted up at guide block 13 bottom center department, and a plurality of side channel 15 has been seted up to guide groove 14 inside wall first ring-type, and a plurality of through-hole 16 has been seted up to the roof in side channel 15. The gas enters each side groove 15 through the guide groove 14 and is discharged through the through hole 16, and meanwhile, the driven rod 9 drives the guide block 13 to rotate, so that the gas can be comprehensively and uniformly diffused to each position in the mixing pipe 2, and the subsequent and sufficient mixing with air is facilitated.

The top of the boiler body 3 is provided with a smoke exhaust pipe 17 in a penetrating way, one end of the smoke exhaust pipe 17 far away from the boiler body 3 penetrates through the side wall of the shell 1 to be communicated with the mixing pipe 2, smoke generated after combustion of gas and air enters the mixing pipe 2 along the smoke exhaust pipe 17 to participate in next combustion, smoke internal circulation is formed, and the flame temperature is controlled at a lower level. The connection of the smoke exhaust pipe 17 to the mixing pipe 2 is between the guide block 13 and the lowermost mixing rod 11.

The peripheral surface of the driven rod 9 is fixedly sleeved with a driving bevel gear 18, and the inner wall of the smoke exhaust pipe 17 is fixedly connected with two fixed frames. A linkage rod 19 is arranged in the smoke exhaust pipe 17, and the linkage rod 19 rotates to penetrate through the two fixing frames. One end of the linkage rod 19 is fixedly connected with a driven bevel gear 20, and the driven bevel gear 20 is meshed with the driving bevel gear 18.

The driven rod 9 rotates to drive the driving bevel gear 18 to rotate, the driving bevel gear 18 drives the driven bevel gear 20 to rotate, and the driven bevel gear 20 drives the linkage rod 19 to rotate. The outer peripheral surface of the linkage rod 19 is fixedly sleeved with the fan blades 21, and when the fan blades 21 rotate, air is blown towards the mixing pipe 2, so that negative pressure is formed at the part, close to the boiler body 3, in the smoke exhaust pipe 17, and smoke can enter the mixing pipe 2 more fully.

The implementation principle of the above embodiment is as follows:

add gas and air through gas intake pipe 5 and air intake pipe 12, the gas flows to the hybrid shell behind the entering shell 4, the gas blows to impeller 7 simultaneously and drives impeller 7 and rotate, impeller 7 drives worm 6 and rotates, worm 6 rotates and drives worm wheel 10 and rotate, worm wheel 10 rotates and drives driven lever 9 and rotate, driven lever 9 drives guide block 13 motion, the gas passes through guiding groove 14 simultaneously and gets into each side groove 15 in, and discharge through-hole 16, make each position in gas can comprehensive and even diffusion to hybrid tube 2, make things convenient for follow-up and the abundant mixture of air.

After being discharged from the through hole 16, the fuel gas is contacted and mixed with the air, meanwhile, the driven rod 9 drives the mixing rod 11 to rotate, the air and the fuel gas are uniformly mixed, and the mixed gas is sprayed out from the fuel gas nozzle to participate in combustion.

Driven lever 9 rotates and drives drive bevel gear 18 and rotate, drive bevel gear 18 drives driven bevel gear 20 and rotates, driven bevel gear 20 drives gangbar 19 and rotates, gangbar 19 rotates and drives flabellum 21 and rotates, blows towards mixing tube 2 when flabellum 21 rotates, makes the portion that is close to boiler body 3 in the pipe 17 of discharging fume form the negative pressure to make the flue gas can be more abundant get into mixing tube 2 and participate in follow-up burning, make flame temperature control at lower level, reduce nitrogen oxide's output.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a low nitrogen gas burner of flue gas inner loop, includes casing (1) and is located mixing tube (2) in casing (1), casing (1) one side is provided with boiler body (3), its characterized in that: mixing tube (2) one side fixedly connected with air inlet shell (4), air inlet shell (4) first one with mixing tube (2) communicate with each other, gas intake pipe (5) wear to be equipped with in air inlet shell (4) one side lower half, air inlet shell (4) internal rotation is connected with worm (6), the fixed cover in worm (6) outer peripheral face is equipped with impeller (7), air inlet shell (4) one side inner wall that is close to mixing tube (2) has been seted up and has been dodged groove (8), dodge groove (8) part extend to in mixing tube (2), it is connected with driven lever (9) to dodge to rotate between groove (8) internal bottom wall and mixing tube (2) internal top wall, driven lever (9) outer peripheral face is located dodge the fixed cover in position in groove (8) and be equipped with worm wheel (10), worm (6) with worm wheel (10) mesh mutually, the fixed cover in driven lever (9) outer peripheral face is equipped with a plurality of mixing rod (11), air intake pipe (2) one side is worn to be equipped with air intake pipe (12).

2. The low-nitrogen gas burner with internal circulation of flue gas as claimed in claim 1, characterized in that: the fixed cover in driven lever (9) outer peripheral face is equipped with guide block (13), guide block (13) outer peripheral face with hybrid tube (2) inner wall is laminated mutually, guide block (13) bottom center department has seted up guiding groove (14), a plurality of side channel (15) have been seted up to guiding groove (14) inside wall first, a plurality of through-hole (16) have been seted up to roof in side channel (15).

3. The low-nitrogen gas burner with internal circulation of flue gas as claimed in claim 1, wherein: the top of the boiler body (3) is provided with a smoke exhaust pipe (17) in a penetrating mode, and one end, far away from the boiler body (3), of the smoke exhaust pipe (17) penetrates through the side wall of the shell (1) and is communicated with the mixing pipe (2).

4. The low-nitrogen gas burner with internal circulation of flue gas as claimed in claim 3, wherein: the fixed cover of driven lever (9) outer peripheral face is equipped with drive bevel gear (18), two mounts of tub (17) inner wall fixedly connected with of discharging fume are provided with gangbar (19) in tub (17) of discharging fume, gangbar (19) rotate and pass two mounts, and gangbar (19) one end fixedly connected with driven bevel gear (20), driven bevel gear (20) with drive bevel gear (18) mesh mutually, the fixed cover of gangbar (19) outer peripheral face is equipped with flabellum (21).

5. The low-nitrogen gas burner with internal circulation of flue gas as claimed in claim 1, wherein: the inner side wall of the air inlet shell (4) far away from the mixing pipe (2) is arranged in a manner that the top of the inner side wall is inclined to the mixing pipe (2).

6. The low-nitrogen gas burner with internal circulation of flue gas as claimed in claim 1, wherein: the impeller (7) is partially positioned in the avoidance groove (8).