Annular coal discharging device for treating blockage of blast furnace coal injection gun

Abstract

The utility model discloses an annular coal discharge device for treating blockage of a blast furnace coal injection gun, belongs to the technical field of blast furnace coal injection equipment, and solves the problem of air pollution caused by air discharge of an existing coal gun. The coal discharging device comprises an annular coal discharging pipe surrounding the outer side of a tuyere platform furnace shell, a plurality of rubber pipes which are evenly arranged and communicated with the annular coal discharging pipe are arranged on the outer side of the annular coal discharging pipe, the other ends of the rubber pipes are communicated with coal guns of different labels respectively, one end of the annular coal discharging pipe is provided with a blowing device used for conveying pulverized coal, and the other end of the annular coal discharging pipe is provided with a blowing device used for blowing pulverized coal. A blow-off pipe communicated with the annular coal discharge pipe is arranged at the other end of the annular coal discharge pipe, and a dust falling device is arranged on the blow-off pipe. According to the annular coal discharging device for treating blockage of the blast furnace coal injection gun, after the coal gun is blocked, coal powder of the coal gun can be discharged in an environment-friendly mode, so that the environment is protected, pollution is reduced, and the annular coal discharging device has the advantages of being wide in application range and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace coal injection equipment, in particular to a ring-shaped coal discharge device for treating blockage of a blast furnace coal injection gun. Background Art

[0002] Pulverized coal injection in blast furnace is to inject finely ground anthracite or bituminous coal or a mixture of the two directly into the furnace from the tuyere of the blast furnace to replace coke to provide heat and reducer, thereby reducing the coke ratio and pig iron cost. It is a major technological revolution in modern blast furnace smelting. In the process of coal injection, existing blast furnaces often have coal gun blockage. When dealing with it, it is generally discharged into the air. Since the particle size of coal powder is as fine as -200 mesh, reaching 75-85%, it is equivalent to dust, which seriously pollutes the environment and causes air pollution. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a ring-shaped coal discharge device for treating blockage of a blast furnace coal injection gun in view of the above-mentioned deficiencies in the prior art. The device can discharge the coal powder from the coal gun in an environmentally friendly manner after the coal gun is blocked, thereby protecting the environment and reducing pollution. The device has the characteristics of wide application range and strong practicality.

[0004] The technical solution adopted by the utility model is: a ring-shaped coal discharge device for treating the blockage of the blast furnace pulverized coal gun, comprising a ring-shaped coal discharge pipe surrounding the outer side of the furnace shell of the tuyere platform, a plurality of rubber tubes evenly arranged and connected thereto are arranged on the outer side of the ring-shaped coal discharge pipe, the other end of each of the rubber tubes is respectively connected to a coal gun of a different number, a blowing device for conveying coal powder is arranged at one end of the ring-shaped coal discharge pipe, a sewage pipe connected thereto is arranged at the other end of the ring-shaped coal discharge pipe, and a dust reduction device is arranged on the sewage pipe.

[0005] As a further improvement, the blowing device includes an input pipe, a ball valve and a compressed air bag, one end of the input pipe is connected to the annular coal discharge pipe, one end of the input pipe is connected to the compressed air bag, and the ball valve is installed on the input pipe.

[0006] Furthermore, a quick connector is provided at one end of the input pipe, the quick connector is plugged into the compressed air bag, and a clamp is provided at the connection between the quick connector and the compressed air bag.

[0007] Furthermore, the dust reduction device includes a spray box, a water pump and multiple spray heads, the spray box is installed above the sewage pipe, the spray head is installed at the bottom of the spray box and connected to the interior thereof, the spray box is connected to the output end of the water pump, and the input end of the water pump is connected to an external water pool.

[0008] Furthermore, the sewage discharge pipe and the annular coal discharge pipe are connected via an air outlet pipe, and a pressure gauge is provided on the air outlet pipe.

[0009] Furthermore, the air outlet pipe is arranged obliquely, and the lowest end of the air outlet pipe is connected to a sewage pipe.

[0010] Beneficial Effects

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] The utility model discloses an annular coal discharge device for treating the blockage of blast furnace coal injection lance. The device adopts a DN40 galvanized steel pipe, and makes an annular coal discharge pipe around the furnace shell on the tuyere platform. Then, the coal discharge port of each coal injection lance is connected to the annular coal discharge pipe with a rubber pipe. When the coal injection lance is found to be blocked, the coal powder is discharged into the annular pipe through the rubber pipe. Then, the compressed air in the compressed air bag is used as the power medium for conveying the coal discharge. The ball valve is opened to discharge the coal powder into the sewage pipe. Then, the water is pumped by the water pump of the dust suppression device, and then sprayed by multiple spray heads. The coal powder is quickly precipitated into the sewage and discharged into the wastewater treatment pool, which effectively avoids the dust phenomenon, solves the on-site environmental pollution, improves the environmental quality, and has the characteristics of strong practicality and wide application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0014] Figure 2 It is an enlarged schematic diagram of the cross-sectional structure of the sewage pipe in the utility model.

[0015] Among them: 1-annular coal discharge pipe, 2-blowing device, 3-dust suppression device, 4-rubber hose, 5-coal gun, 6-quick connector, 7-clamp, 8-air outlet pipe, 9-pressure gauge, 10-drain pipe, 21-inlet pipe, 22-ball valve, 23-compressed air bag, 31-spray box, 32-spray head, 33-water pump. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0017] See also Figure 1-2As shown, the utility model is a ring-shaped coal discharge device for treating the blockage of the blast furnace coal injection gun, comprising a ring-shaped coal discharge pipe 1 surrounding the outer side of the furnace shell of the tuyere platform, a plurality of rubber tubes 4 evenly arranged and connected thereto are arranged on the outer side of the ring-shaped coal discharge pipe 1, the other end of each rubber tube 4 is respectively connected to a coal gun 5 of a different number, a blowing device 2 for conveying coal powder is arranged at one end of the ring-shaped coal discharge pipe 1, a sewage pipe 10 connected thereto is arranged at the other end of the ring-shaped coal discharge pipe 1, a dust suppression device 3 is arranged on the sewage pipe 10, a DN40 galvanized steel pipe is used to make a ring-shaped coal discharge pipe 1 around the furnace shell on the tuyere platform, and then Then, the coal discharge port of each coal-spraying coal gun 5 is connected to the annular coal discharge pipe 1 with a rubber tube 4. When the coal-spraying coal gun 5 is found to be blocked, the coal powder is discharged into the annular pipe through the rubber tube 4, and then the compressed air in the compressed air bag 23 is used as the power medium for conveying the coal. The ball valve 22 is opened to discharge the coal powder into the sewage pipe 10, and then the water is pumped by the water pump 33 of the dust suppression device 3, followed by spraying through multiple spray heads 32, so that the coal powder is quickly precipitated into the sewage and discharged into the wastewater treatment pool, which effectively avoids dust phenomenon, solves on-site environmental pollution and improves environmental quality.

[0018] Specifically, the blowing device 2 includes an input pipe 21, a ball valve 22 and a compressed air bag 23. One end of the input pipe 21 is connected to the annular coal discharge pipe 1, and one end of the input pipe 21 is connected to the compressed air bag 23. The ball valve 22 is installed on the input pipe 21. The compressed air bag 23 is used to regularly clean the annular coal discharge pipe 1, and there is no need to install an air pump equipment, which saves costs.

[0019] Preferably, a quick connector 6 is provided at one end of the input pipe 21, and the quick connector 6 is inserted into the compressed air bag 23. A clamp 7 is provided at the connection between the quick connector 6 and the compressed air bag 23 to facilitate replacement of the compressed air bag 23 after the compressed air is used up. The clamp 7 plays a tightening role and effectively prevents air leakage at the connection.

[0020] Furthermore, the dust reduction device 3 includes a spray box 31, a water pump 33 and a plurality of spray heads 32. The spray box 31 is installed above the sewage pipe 10, and the spray head 32 is installed at the bottom of the spray box 31 and connected with the interior thereof. The spray box 31 is connected with the output end of the water pump 33, and the input end of the water pump 33 is connected with an external water pool. Water is pumped by the water pump of the dust reduction device and then sprayed by a plurality of spray heads, so that the coal powder is quickly precipitated into the sewage and discharged into the wastewater treatment pool, thereby effectively avoiding dust and solving the on-site environmental pollution.

[0021] Furthermore, the sewage pipe 10 is connected to the annular coal discharge pipe 1 through an air outlet pipe 8, and a pressure gauge 9 is provided on the air outlet pipe 8 to detect the delivery pressure, thereby quickly judging whether there is leakage in the pipeline and improving the maintenance efficiency.

[0022] Furthermore, the gas outlet pipe 8 is arranged at an angle, and the lowest end of the gas outlet pipe 8 is connected to the sewage pipe 10 , which is conducive to the discharge of coal powder settled at the bottom of the gas outlet pipe 8 into the sewage pipe 10 .

[0023] When in use, a ring-shaped coal discharge device for treating blockage of a blast furnace coal injection lance of the present embodiment adopts a DN40 galvanized steel pipe, and a ring-shaped coal discharge pipe 1 is made on the tuyere platform around the furnace shell. Then, the coal discharge port of each coal injection lance 5 is connected to the ring-shaped coal discharge pipe 1 with a rubber tube 4. When the coal injection lance 5 is found to be blocked, the coal powder is discharged into the ring-shaped pipe through the rubber tube 4, and then the compressed air in the compressed air bag 23 is used as the power medium for conveying the discharged coal. The ball valve 22 is opened to discharge the coal powder into the sewage pipe 10, and then the water pump 33 of the dust suppression device 3 is used to pump water, followed by spraying through multiple spray heads 32, so that the coal powder is quickly precipitated into the sewage and discharged into the wastewater treatment pool, which effectively avoids dust phenomenon, solves on-site environmental pollution, and improves environmental quality. The utility model discloses a ring-shaped coal discharge device for treating blockage of a blast furnace coal injection lance. After the coal lance is blocked, the coal powder of the coal lance can be discharged in an environmentally friendly manner, thereby protecting the environment and reducing pollution. The utility model has the characteristics of wide application range and strong practicality.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A ring-type coal discharge device for treating blockage of blast furnace coal injection gun, characterized in that: The invention comprises an annular coal discharge pipe (1) surrounding the outer side of the furnace shell of the tuyere platform, wherein the outer side of the annular coal discharge pipe (1) is provided with a plurality of rubber tubes (4) evenly arranged and connected thereto, and the other end of each of the rubber tubes (4) is respectively connected to a coal gun (5) of a different number, and one end of the annular coal discharge pipe (1) is provided with a blowing device (2) for conveying coal powder, and the other end of the annular coal discharge pipe (1) is provided with a sewage discharge pipe (10) connected thereto, and the sewage discharge pipe (10) is provided with a dust suppression device (3).

2. The ring-type coal discharge device for treating blockage of blast furnace coal injection lance according to claim 1, characterized in that: The blowing device (2) comprises an input pipe (21), a ball valve (22) and a compressed air bag (23); one end of the input pipe (21) is connected to the annular coal discharge pipe (1); one end of the input pipe (21) is connected to the compressed air bag (23); and the ball valve (22) is installed on the input pipe (21).

3. The ring-type coal discharge device for treating blockage of blast furnace coal injection lance according to claim 2, characterized in that: A quick connector (6) is provided at one end of the input pipe (21), and the quick connector (6) is plugged into the compressed air bag (23). A clamp (7) is provided at the connection between the quick connector (6) and the compressed air bag (23).

4. The ring-type coal discharge device for treating blockage of blast furnace coal injection lance according to claim 1, characterized in that: The dust suppression device (3) comprises a spray box (31), a water pump (33) and a plurality of spray heads (32); the spray box (31) is installed above the sewage pipe (10); the spray heads (32) are installed at the bottom of the spray box (31) and are connected to the interior thereof; the spray box (31) is connected to the output end of the water pump (33); and the input end of the water pump (33) is connected to an external water pool.

5. The ring-type coal discharge device for treating blockage of blast furnace coal injection lance according to claim 1, characterized in that: The sewage discharge pipe (10) is connected to the annular coal discharge pipe (1) via an air outlet pipe (8), and a pressure gauge (9) is provided on the air outlet pipe (8).

6. The ring-type coal discharge device for treating blockage of blast furnace coal injection lance according to claim 5, characterized in that: The air outlet pipe (8) is arranged obliquely, and the lowest end of the air outlet pipe (8) is connected to the sewage discharge pipe (10).

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