CN216704824U

CN216704824U - Blast furnace spray gun blockage cleaning device

Info

Publication number: CN216704824U
Application number: CN202123071626.6U
Authority: CN
Inventors: 赵雪斌; 池逢源; 路振毅; 师青; 张尧
Original assignee: Shanxi Taigang Stainless Steel Co Ltd
Current assignee: Shanxi Taigang Stainless Steel Co Ltd
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-06-10
Anticipated expiration: 2031-12-09

Abstract

The utility model relates to the technical field of blast furnace iron making, in particular to a blast furnace spray gun blockage removing device which comprises a water tank, a coal inlet pipe, a high-pressure water pipe ball valve, a blow-off pipe and a coal inlet pipe ball valve. The water mist generated by the high-pressure water passing through the spray head is fully mixed with the coal spraying dust generated in the blockage removing process of the spray gun in the water tank, and the water tank is cooled and dusted, so that the safety and the environmental protection of the blockage removing process are realized.

Description

Blast furnace spray gun blockage cleaning device

Technical Field

The utility model relates to the technical field of blast furnace ironmaking, in particular to a blockage removing device for a blast furnace spray gun.

Background

At present, the blast furnace in China adopts a pulverized coal injection process to replace expensive coke, so that the aims of saving energy, reducing consumption and flexibly conditioning the furnace temperature are fulfilled. The coal powder is delivered to the distributor from the coal injection pipe and then injected into the blast furnace through the coal injection branch pipe and the coal injection gun. Coal injection branch pipes and coal injection guns are the tail ends of the whole coal injection system, are small in pipe diameter and large in resistance loss, and once sundries are mixed in coal powder, the blockage is easy to happen, so that the coal injection quantity in the circumferential direction of a blast furnace is not uniform, the air flow distribution changes, and the furnace condition is fluctuated. When a plurality of coal injection guns are blocked, the coal injection quantity of the blast furnace can be seriously influenced.

At present, the mode of dredging the coal injection branch pipe and the spray gun is to directly communicate a three-way valve connected with the branch pipe or the coal injection gun with the outside, and blow out the pulverized coal in a pipeline through the pressure in an injection system or the pressure in a blast furnace. A large amount of coal dust is discharged to cause environmental pollution, and high-temperature and high-pressure gas in the furnace can cause safety accidents such as burning or burning and scalding when the spray gun is dredged.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provides a blast furnace spray gun blockage cleaning device.

The purpose of the utility model is realized as follows: the utility model provides a clear stifled device of blast furnace spray gun, includes the water tank, advances coal pipe, high pressure water pipe ball valve, blow off pipe, advances the coal pipe ball valve, advances the coal union coupling to water tank, is connected with the blow off pipe on the water tank, and in high pressure water pipe is connected to the water tank, the one end of high pressure water pipe in the water tank was provided with the shower nozzle, advances to be provided with on the coal pipe and advances the coal pipe ball valve, is provided with high pressure water pipe ball valve on the high pressure water pipe.

Furthermore, one end of the coal inlet pipe, which is far away from the water tank, is connected with a tee joint, the other two ends of the tee joint are respectively connected with a coal injection branch pipe and a spray gun hose, the other end of the spray gun hose is connected with the blast furnace, and a spray gun ball valve is arranged on the spray gun hose.

The water mist generated by the high-pressure water passing through the spray head is fully mixed with the coal spraying dust generated in the blockage removing process of the spray gun in the water tank, and the water tank is cooled and dusted, so that the safety and the environmental protection of the blockage removing process are realized.

The utility model has the beneficial effects that:

the utility model can realize the quick and environment-friendly blockage removal of the spray gun and the coal injection branch pipe, is convenient to use, uses the quick connector to connect the tee joint between the coal injection branch pipe and the spray gun, can carry out the blockage removal of the spray gun after high-pressure water is introduced, can realize dust fall and temperature reduction effects by water mist generated by the high-pressure water, and ensures that no environment-friendly and safety accidents occur during the blockage removal operation.

The tai gang 1800m blast furnace uses the utility model discloses technique, and clear stifled operation is on average three times daily, and discharge buggy and plug 2kg at every turn, the annual dust emission that reduces has reduced environmental pollution 2.19 t. Meanwhile, due to high blockage removal efficiency and simple and convenient use, the blockage removal time is reduced, the uniform coal injection of the blast furnace is ensured, the airflow is stable, and the smooth operation of the furnace condition is ensured.

Drawings

The utility model is further described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a diagram of practical application of the present invention.

Fig. 3 is a schematic view showing the structure of the head in the water tank according to the present invention.

Wherein: 1-coal inlet pipe, 2-coal inlet pipe ball valve, 3-water tank, 4-nozzle 5-blow-off pipe, 6-high pressure water pipe ball valve, 7-high pressure water pipe, 8-blast furnace, 9-spray gun ball valve, 10-spray gun hose, 11-coal injection branch pipe and 12-tee joint.

Detailed Description

The utility model aims to provide a structure for reducing air pollution and avoiding safety accidents of burning and scalding caused by high-temperature gas in a furnace when a coal injection branch pipe or a coal injection gun is blocked.

The blockage clearing device comprises a water tank, a coal inlet pipe, a high-pressure water pipe and a blow-off pipe. Wherein the coal inlet pipe is connected to a three-way ball valve from a coal injection branch pipe to a coal injection gun through a metal hose, the high-pressure water pipe is led into high-pressure industrial circulating water, and a sewage outlet of the sewage discharge pipe is connected to a water outlet groove of the tuyere platform.

When the coal injection branch pipe or the spray gun is blocked, the blockage removing device is arranged on the coal injection branch pipe three-way valve and is connected with high-pressure water. Opening the high-pressure water pipe ball valve to introduce high-pressure water, then blowing pulverized coal and sundries in the coal injection branch pipe or the spray gun into the water tank according to the blockage clearing requirement, closing the three-way valve after blockage clearing is finished, closing the coal inlet pipe ball valve, closing the high-pressure water pipe ball valve after high-pressure water is stopped, and dismantling the device.

The blockage removing device generates water mist through the high-pressure water by the aid of the spray nozzle, and the water mist is fully mixed with pulverized coal discharged into the water tank, so that the effects of dust removal and temperature reduction are achieved, and safety accidents caused by flying dust and spraying of high-temperature gas in the furnace in the blockage removing process are avoided.

When the blockage is cleared, the coal inlet pipe is connected with a tee joint between the coal injection branch pipe and the spray gun, and the high-pressure water pipe is introduced with high-pressure water to form water mist in the water tank. By opening and closing the valves, plugs in the coal injection branch pipes or the spray guns are blown into the water tank by means of gas pressure in the coal injection system or gas pressure in the furnace, and are discharged through the blow-off pipe after dust fall and temperature reduction through water mist. The utility model has convenient, fast, efficient and safe operation, avoids the pollution caused by directly discharging coal powder into the atmosphere, can simultaneously avoid the injury of operators caused by the ejection of high-temperature gas, realizes fast and efficient blockage removal operation, and is beneficial to the uniform coal injection, stable air flow and smooth operation of a blast furnace.

The components of the utility model are shown in figure 1 and comprise 1-a coal inlet pipe, 2-a coal inlet pipe ball valve, 3-a water tank, 4-a spray head, 5-a sewage discharge pipe, 6-a high-pressure water pipe ball valve and 7-a high-pressure water pipe. The coal inlet pipe 1 is connected with a tee joint 12 between the coal injection branch pipe 11 and the coal injection hose 10. The water tank is a cylinder with the diameter of 400mm and the length of 500mm, and the internal structure is shown in figure 1. The diameter of the coal inlet pipe is 58mm, and a manual ball valve is arranged at the axis of the end face. The high-pressure water pipe is close to the side wall of the water tank, the central line of the high-pressure water pipe is 150mm away from the axis of the water tank, the tail end of the high-pressure water pipe is closed, and the high-pressure water pipe penetrates into the water tank to form a spray head. Nozzle structure referring to fig. 3, three conical holes with the diameter of 5mm60 degrees are formed every 50mm, the distance between every two conical holes is 30 degrees, and the holes face to the axis of the water tank.

The mode of use is shown in figure 2. When the coal injection branch pipe is blocked, the device is connected to the tee joint 12, the high-pressure water pipe 7 is introduced with high-pressure water, the high-pressure water pipe ball valve 6 is opened, after water returns and flows out of the sewage discharge pipe 5, the coal injection gun ball valve 9 is closed, the coal inlet pipe ball valve 2 is opened, the tee joint is turned to the coal injection branch pipe and the coal inlet pipe, coal dust and blocking objects are blown into a water tank by using the gas pressure in the coal injection system, are mixed with water mist formed by a nozzle and are discharged through the sewage discharge pipe 5. And after the blockage is cleared, the tee joint is turned to the coal injection branch pipe 11 and the spray gun 10, the ball valve 9 of the coal injection gun is opened, the ball valve 2 of the coal inlet pipe is closed, the introduction of high-pressure water is stopped, the ball valve 6 of the high-pressure water pipe is closed, and the device is released.

Referring to fig. 3, the high pressure water pipe extends into the water tank, the central line of the high pressure water pipe is 150mm away from the axis of the water drum, and the tail end of the high pressure water pipe is closed. Three conical holes with the diameter of 5mm60 degrees are arranged on the water pipe every 50mm, the distance between every two conical holes is 30 degrees, and the holes face to the axis of the water drum.

When the spray gun is blocked, the ball valve 9 of the coal injection gun is closed, the coal inlet pipe 1 is connected to the tee joint 12, the ball valve 2 of the coal inlet pipe is closed, high-pressure water is introduced into the high-pressure water pipe 7, the ball valve 6 of the high-pressure water pipe is opened, after the returned water flows out of the sewage discharge pipe 5, the tee joint 12 is turned to the spray gun 10 and the coal inlet pipe 1, the ball valve 2 of the coal inlet pipe is opened, the ball valve 9 of the spray gun is opened, and coal injection and blocking objects are blown into the water tank 3 by using the gas pressure in the furnace. And after the blockage is cleared, closing the ball valve 9 of the spray gun, and turning the tee joint to the coal injection branch pipe 11 and the spray gun 10. Closing the ball valve 2 of the coal inlet pipe. Stopping introducing the high-pressure water, closing the high-pressure water ball valve 6 and releasing the device.

The above description is only an embodiment of the present invention, but the structural features of the present invention are not limited thereto, and any changes or modifications within the scope of the present invention by those skilled in the art are covered by the present invention.

Claims

1. The utility model provides a clear stifled device of blast furnace spray gun which characterized in that: including the water tank, advance coal pipe, high pressure water pipe ball valve, blow off pipe, advance coal pipe ball valve, advance coal union coupling to water tank, be connected with the blow off pipe on the water tank, in high pressure water union coupling to water tank, high pressure water pipe one end in the water tank is provided with the shower nozzle, advances to be provided with on the coal pipe and advances coal pipe ball valve, is provided with high pressure water pipe ball valve on the high pressure water pipe.

2. The blast furnace spray gun blockage clearing device according to claim 1, characterized in that: one end of the coal inlet pipe, which is far away from the water tank, is connected with a tee joint, the other two ends of the tee joint are respectively connected with a coal injection branch pipe and a spray gun hose, the other end of the spray gun hose is connected with the blast furnace, and a spray gun ball valve is arranged on the spray gun hose.