CN217678315U

CN217678315U - Novel external blowing device for black liquor spray gun of alkali recovery boiler

Info

Publication number: CN217678315U
Application number: CN202221037668.XU
Authority: CN
Inventors: 刘刚; 吴渊
Original assignee: Hainan Jinhai Pulp and Paper Co Ltd
Current assignee: Hainan Jinhai Pulp and Paper Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-10-28
Anticipated expiration: 2032-04-29

Abstract

The utility model discloses a novel external device that sweeps of alkali recovery boiler black liquor spray gun, including house steward and branch pipe, the hyoplastron side of black liquor spray gun is located to the branch pipe, the branch pipe with the house steward intercommunication, house steward and high pressurized air source intercommunication follow branch pipe spun gas blows the hyoplastron both sides at black liquor spray gun. The utility model provides a novel external device that sweeps of alkali recovery boiler black liquor spray gun sweeps to the hyoplastron both sides jet-propelled of black liquor spray gun through the branch pipe, prevents to block up.

Description

Novel external blowing device for black liquor spray gun of alkali recovery boiler

Technical Field

The utility model relates to an alkali recovery boiler technical field, in particular to novel external device that sweeps of alkali recovery boiler black liquor spray gun.

Background

Present large-scale alkali recovery boiler design all can have the design of boiler furnace nose, is mainly used for protecting the over heater, prevents that the direct rising of flue gas of high temperature from causing the over temperature of over heater. However, the design also causes the smoke in the area below the furnace nose to generate rotational flow, thereby causing the smoke to flow back at the opening of the black liquor gun of the boiler, and the smoke in the boiler is mixed with some black liquor particles which are burning and is sprayed out from the opening. Under the condition, after the black liquor gun is installed and jetted for a period of time, the molten material particles carried by the backflow of the flue gas are accumulated at the gun head of the black liquor gun, and the accumulation is more serious along with the increase of the time, so that the gun mouth of the black liquor gun is blocked. The blockage can not only cause the service life of the black liquor gun head to be shortened due to poor heat exchange, but also cause the particle size, the injection area, the injection quantity and the like of the black liquor injected into the hearth to be changed, so that the combustion load of the boiler and the smoke emission data are fluctuated.

Disclosure of Invention

To the above-mentioned prior art, the utility model provides a novel alkali recovery boiler black liquor spray gun is external sweeps device sweeps through branch pipe to the hyoplastron both sides jet-propelled of black liquor spray gun, prevents to block up and influences black liquor rifle head life-span, makes boiler combustion data stable.

The technical scheme of the invention is realized as follows:

the utility model provides a novel external device that sweeps of alkali recovery boiler black liquor spray gun, includes house steward and branch pipe, the hyoplastron side of black liquor spray gun is located to the branch pipe, the branch pipe with the house steward intercommunication, house steward and high pressurized air source intercommunication follow branch pipe spun gas blows the hyoplastron both sides at black liquor spray gun.

Furthermore, the branch pipes comprise 2 front branch pipes, and the two front branch pipes are arranged on two sides of the tongue plate.

Furthermore, the air outlet direction of the front branch pipe is tangent to the outer side surface of the tongue plate.

Further, the header pipe is rotatably connected with a fixed support, the fixed support is provided with a fastening bolt, and the fastening bolt is used for clamping the header pipe.

Furthermore, the main pipe is communicated with a gas pipe of a high-pressure gas source through a hose, and a valve is arranged on the hose or the gas pipe.

Furthermore, the valve is an electromagnetic valve, and the electromagnetic valve is in signal connection with the controller.

Furthermore, a partition plate, an impeller and a baffle are arranged in the branch pipe, the partition plate divides the branch pipe into a left air flow passage and a right air flow passage, the baffle is connected with the impeller, the impeller is rotatably connected with the branch pipe, and the impeller drives the baffle to alternately shield the two air flow passages.

Furthermore, the baffle is provided with an inner gear ring, the impeller is provided with a first gear, the first gear is meshed with the inner gear ring through a second gear, and the baffle and the second gear are rotatably connected in the branch pipe.

The beneficial effects of the utility model reside in that:

the gas sprayed from the branch pipes sweeps the gun mouth of the black liquor gun and the welding side face of the tongue plate, namely, large black liquor particles which are not good in spraying are swept away in time under the action of gas blowing, and the phenomenon that the large black liquor blocks fall on a carbon bed after being accumulated for a long time is avoided, and scaling on two sides of the tongue plate can be avoided. Improves the black liquor spray combustion state and reduces the entrance of oversized particles into a hearth. And stabilizing the combustion state of the alkali furnace and stabilizing the smoke data. The combustion efficiency of the hearth is improved. Under the condition that the use function of the existing black liquor spray gun is not changed, a purging device is designed and arranged outside the gun head. The position of the black liquor gun head, which is easy to scale, is swept through the nozzle of the sweeping device, so that the cleanness of the black liquor gun head is maintained, the service life of the black liquor gun head is prolonged, and the potential injury risk caused by manually cleaning the gun head is avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive effort.

FIG. 1 is a schematic structural diagram of an external blowing device of a novel alkali recovery boiler black liquor spray gun in embodiment 1 of the present invention;

FIG. 2 is a schematic view of the internal structure of a branch pipe according to embodiment 2 of the present invention;

FIG. 3 is a schematic view of the internal structure of a branch pipe according to embodiment 2 of the present invention;

in the figure, a main pipe 1, branch pipes 2, black liquor spray guns 3, clappers 4, front branch pipes 5, fixing supports 7, fastening bolts 8, hoses 9, a high-pressure air source 10, valves 11, a controller 12, a separation plate 13, impellers 14, baffles 15, an inner gear ring 16, a first gear 17 and a second gear 18 are arranged.

Detailed Description

In order to better understand the technical content of the present invention, the following embodiments are provided, and the present invention is further described with reference to the accompanying drawings.

Example 1

Referring to fig. 1, the external purging device for the novel alkali recovery boiler black liquor spray gun comprises a main pipe 1 and branch pipes 2, wherein the branch pipes 2 are arranged on the side surface of a tongue plate 4 of the black liquor spray gun 3, the branch pipes 2 are communicated with the main pipe 1, the main pipe 1 is communicated with a high-pressure air source 10, and gas sprayed from the branch pipes 2 is blown to two sides 4 of the tongue plate of the black liquor spray gun 3. After entering the main pipe 1, the gas of the high-pressure gas source 10 flows from the main pipe 1 to the branch pipes 2, and finally is sprayed out from the branch pipes 2 and blown on two sides 4 of the tongue plate of the black liquor spray gun 3. The gas sprayed out through the branch pipes 2 sweeps the welding side face of the black liquor gun muzzle and the tongue plate 4, namely, the large black liquor particles which are not good in spraying are swept away in time under the gas blowing action, the phenomenon that the large black liquor blocks fall on a carbon bed after being accumulated for a long time is avoided, and scaling on two sides of the tongue plate 4 can be avoided. The black liquor spraying combustion state is improved, oversized particles are reduced from entering a hearth, the combustion state of the alkali furnace is stabilized, flue gas data are stabilized, and the combustion efficiency of the hearth is improved. Under the condition that the service function of the existing black liquor spray gun 3 is not changed, the purging device is arranged outside the gun head, the position of the black liquor gun head, which is easy to scale, is purged through the nozzle of the purging device, the cleanness of the black liquor gun head is kept, the service life of the black liquor gun head is prolonged, and the potential damage risk caused by manually cleaning the gun head is avoided.

Optionally, the high-pressure air source 10 is a compressed air pipeline for a paper mill, or the high-pressure air source 10 adopts an air compression pump.

Specifically, the branch pipes 2 comprise front branch pipes 5, the number of the front branch pipes 5 is 2, and the two front branch pipes 5 are arranged on two sides of the tongue plate 4. The two branch pipes 2 blow air from two sides of the tongue plate 4 respectively, and the blowing effect is improved.

Specifically, the air outlet direction of the front branch pipe 5 is tangent to the surfaces of the two sides of the tongue plate 4. The purged gas moves along the outer surfaces of the two sides 4 of the tongue plate to purge the black liquor on the two sides 4 of the tongue plate.

Specifically, the main pipe 1 is rotatably connected with a fixed support 7, the fixed support 7 is provided with a fastening bolt 8, and the fastening bolt 8 is used for clamping the main pipe 1. Fixed bolster 7 and house steward 1 can rotate relatively, twist fastening bolt 8 into fixed branch pipe 7 after rotating to suitable angle, utilize fastening bolt with house steward 1 chucking on fixed bolster 7, sweep the angle through the regulation and make the laminating of branch pipe 2 at 3 sides of black liquor spray gun, observe the effect of sweeping, ensure that 3 heads of black liquor spray gun do not pile up scaling article.

Specifically, the main pipe 1 is communicated with a gas pipe of a high-pressure gas source 10 through a hose 9, and a valve 11 is arranged on the hose 9 or the gas pipe. The angle of the main pipe 1 can be adjusted more conveniently by connecting the hose 9, the air blowing amount is adjusted by the valve 11, and the opening of the stop valve is adjusted to enable the purging to reach the optimal state.

Optionally, the valve 11 is an electromagnetic valve, and the electromagnetic valve is in signal connection with the controller 12. Can make factory's gas regularly sweep black liquor rifle hyoplastron 4 welding both sides through branch pipe 2 through setting for the solenoid valve time of opening and shutting, make the black liquor large granule that sprays not good in time drop.

Example 2

Referring to fig. 2 to 3, the present embodiment is different from embodiment 1 in that a partition plate 13, an impeller 14, and a baffle 15 are disposed in the branch pipe 2, the partition plate 13 divides the branch pipe 2 into a left air flow passage and a right air flow passage, the baffle 15 is connected to the impeller 14, the impeller 14 is rotatably connected to the branch pipe 2, and the impeller 14 drives the baffle 15 to alternately block the two air flow passages. When the airflow passes through the branch pipe 2, the impeller 14 is driven to rotate, so that the baffle 15 is driven to alternately open the left air flow channel and the right air flow channel, and the air is alternately discharged from the two air flow channels, thereby forming the effect of scavenging air left and right.

Specifically, the baffle 15 is provided with an inner gear ring 16, the impeller 14 is provided with a first gear 17, the first gear 17 is meshed with the inner gear ring 16 through a second gear 18, and the baffle 15 and the second gear 18 are rotatably connected in the branch pipe 2. When the impeller 14 rotates, the first gear 17 is driven to rotate, the transmission ratio of the first gear 17 to the inner gear ring 16 is large, the rotating speed of the first gear 17 is greater than that of the inner gear ring 16, and the low rotating speed rotation of the isolation plate 13 is ensured after the impeller 14 rotates rapidly after speed reduction.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a novel external device that sweeps of alkali recovery boiler black liquor spray gun, its characterized in that, includes house steward and branch pipe, the hyoplastron side of black liquor spray gun is located to the branch pipe, the branch pipe with the house steward intercommunication, house steward and high pressurized air source intercommunication follow branch pipe spun gas blows the hyoplastron both sides at black liquor spray gun.

2. The external sweeping device for the black liquor spray gun of the novel alkali recovery boiler according to claim 1, wherein the branch pipes comprise 2 front branch pipes, and two front branch pipes are arranged on two sides of the tongue plate.

3. The external sweeping device for the black liquor spray gun of the novel alkali recovery boiler according to claim 2, wherein the air outlet direction of the front branch pipe is tangential to the outer side surface of the tongue plate.

4. The external purging device for the black liquor spray gun of the novel alkali recovery boiler according to claim 1, is characterized in that the header pipe is rotatably connected with a fixed support, and the fixed support is provided with a fastening bolt which is used for clamping the header pipe.

5. The external purging device for the black liquor spray gun of the novel alkali recovery boiler according to claim 1, is characterized in that the main pipe is communicated with a gas pipe of a high-pressure gas source through a hose, and a valve is arranged on the hose or the gas pipe.

6. The external sweeping device for the black liquor spray gun of the novel alkali recovery boiler is characterized in that the valve is an electromagnetic valve, and the electromagnetic valve is in signal connection with a controller.

7. The external sweeping device for the black liquor spray gun of the novel alkali recovery boiler according to claim 1, wherein a partition plate, an impeller and a baffle are arranged in the branch pipe, the partition plate divides the branch pipe into a left air flow passage and a right air flow passage, the baffle is connected with the impeller, the impeller is rotatably connected with the branch pipe, and the impeller drives the baffle to alternately block the two air flow passages.

8. The external sweeping device for the black liquor spray gun of the novel alkali recovery boiler according to claim 7, wherein the baffle is provided with an inner gear ring, the impeller is provided with a first gear, the first gear is meshed with the inner gear ring through a second gear, and the baffle and the second gear are rotatably connected in the branch pipe.