Blockage treatment device for coal injection gun

Abstract

The utility model discloses a gun blocking processing device for a coal injection gun, which belongs to the technical field of blast furnace ironmaking and comprises the coal injection gun, the coal injection gun is connected with a coal injection branch pipe through a coal injection hose, the coal injection branch pipe is communicated with an injection tank through a distributor, a first coal injection valve is arranged on the injection branch pipe, and a second coal injection valve is arranged on the injection tank. A second coal injection valve is arranged on the coal injection branch pipe close to the coal injection gun side, a recovery pipeline is arranged on the coal injection branch pipe between the second coal injection valve and the first coal injection valve in a communicating mode, the outlet end of the recovery pipeline is connected into the dust removal system, and a blow-off valve, a one-way valve and a recovery control valve are sequentially arranged on the recovery pipeline in the medium flow direction. According to the utility model, blockages and pulverized coal of the coal injection gun can be treated and recycled into a dust removal system under the action of the dust removal fan, leakage of the blockages and the pulverized coal is avoided, the risk of explosion and combustion of environmental pollution is reduced, and meanwhile, the original dust removal system is utilized, no additional dust removal equipment is needed, the production cost is reduced, and the equipment utilization rate is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of blast furnace ironmaking, and in particular relates to a gun blockage processing device for a coal injection gun. Background Art

[0002] The main function of the coal injection gun in blast furnace ironmaking technology is to spray coal powder into the blast furnace to meet the production needs of the blast furnace. During the blast furnace production process, the coal injection gun is inserted from the outside of the furnace body to spray coal powder into the blast furnace. The coal powder is mixed with hot air at high temperature and burned, releasing a large amount of heat energy to provide the required heat for the blast furnace. In this way, the blast furnace can be operated efficiently and stably.

[0003] However, the blast furnace coal injection gun may also be blocked during use. If the blockage occurs above the coal injection valve, the conventional operation is to open the valve body to release the blockage and coal powder. Such an operation will not only cause environmental pollution, but also may cause the risk of flash fire due to the spraying of a large amount of dust, posing a serious threat to environmental protection and safe production. Summary of the invention

[0004] In view of the problems existing in the prior art, the utility model provides a device for processing a coal injection gun blockage, which can process the blockage and coal powder of the coal injection gun under the action of a dust removal fan and recycle them into a dust removal system, thereby avoiding leakage of the blockage and coal powder and reducing the risk of environmental pollution and flash fire. At the same time, the original dust removal system is utilized without the need for additional dust removal equipment, thereby reducing production costs and improving equipment utilization.

[0005] The utility model is implemented as follows: a coal injection gun blockage processing device comprises a coal injection gun, wherein the coal injection gun is connected to a coal injection branch pipe through a coal injection hose, the coal injection branch pipe is connected to a blowing tank through a distributor, a first coal injection valve is arranged on the blowing branch pipe, a second coal injection valve is arranged on the coal injection branch pipe close to the coal injection gun side, a recovery pipeline is connected to the coal injection branch pipe between the second coal injection valve and the first coal injection valve, the outlet end of the recovery pipeline is connected to a dust removal system, and a relief valve, a one-way valve and a recovery control valve are sequentially arranged along the medium flow direction of the recovery pipeline.

[0006] Furthermore, a recovery hose is provided between the outlet end of the relief valve and the inlet end of the one-way valve via a first quick connector. The use of a recovery hose connection can overcome the problem of rigid connection, especially in situations where bending or changing direction is required, the recovery hose can more easily adapt to these changes, making installation and pipeline layout more flexible and convenient; and can adapt to thermal expansion and contraction caused by temperature changes, avoiding damage or leakage caused by pipeline stress.

[0007] Furthermore, the dust removal system includes a dust removal hood arranged at the top of the iron mouth and a dust removal pipe connected to the outlet end of the dust removal hood, a dust removal fan is arranged on the dust removal pipe, and the outlet end of the recovery pipeline extends into the dust suction hood and is placed on the inlet side of the dust removal pipe.

[0008] Furthermore, a coal injection gun control valve is provided at the inlet end of the coal injection gun.

[0009] Furthermore, both ends of the coal injection hose are connected to the coal injection gun and the coal injection branch pipe respectively through a second quick-release connector.

[0010] Furthermore, the recovery control valve is a ball valve.

[0011] The utility model has the following advantages and technical effects: due to the adoption of the above technical scheme, the blockage and coal powder of the coal injection gun can be processed and recovered into the dust removal system under the action of the dust removal fan, thereby avoiding the leakage of the blockage and coal powder and reducing the risk of environmental pollution and flash fire. At the same time, the original dust removal system is utilized without the need for additional dust removal equipment, thereby reducing production costs and improving equipment utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the utility model.

[0013] In the figure: 1. coal injection gun; 2. coal injection hose; 3. coal injection branch pipe; 4. second quick-release connector; 5. coal injection gun control valve; 6. first coal injection valve; 7. second coal injection valve; 8. recovery pipeline; 8-1. recovery hose; 9. relief valve; 10. one-way valve; 11. recovery control valve; 12. first quick connector; 13. dust removal hood; 14. dust removal pipeline; 15. dust removal fan. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0015] It should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0016] like Figure 1As shown, the present application provides a coal injection gun blockage treatment device, comprising a coal injection gun 1, wherein the coal injection gun 1 is connected to a coal injection branch pipe 3 through a coal injection hose 2, and preferably, both ends of the coal injection hose 2 are respectively connected to the coal injection gun 1 and the coal injection branch pipe 3 through a second quick-release connector 4. The coal injection branch pipe 3 is connected to the injection tank through a distributor, and specifically, a coal injection gun control valve 5 is provided at the inlet end of the coal injection gun 1.

[0017] The injection branch pipe is provided with a first coal injection valve 6, and the coal injection branch pipe 3 near the coal injection gun 1 is provided with a second coal injection valve 7. The coal injection branch pipe 3 between the second coal injection valve 7 and the first coal injection valve 6 is connected with a recovery pipeline 8, and the outlet end of the recovery pipeline 8 is connected to the dust removal system. The recovery pipeline 8 is provided with a relief valve 9, a one-way valve 10 and a recovery control valve 11 in sequence along the medium flow direction. Preferably, the recovery control valve 11 is a ball valve.

[0018] Specifically, the dust removal system includes a dust removal hood 13 arranged at the top of the iron mouth and a dust removal pipe 14 connected to the outlet end of the dust removal hood 13, and a dust removal fan 15 is arranged on the dust removal pipe 14. The outlet end of the recovery pipeline 8 extends into the dust suction hood 13 and is placed on the inlet side of the dust removal pipe 14.

[0019] A recovery hose 8-1 is provided between the outlet end of the relief valve 9 and the inlet end of the one-way valve 10 via a first quick connector 12. The use of the recovery hose 8-1 for connection can overcome the problem of rigid connection, especially in situations where bending or changing direction is required, the recovery hose 8-1 can more easily adapt to these changes, making installation and pipeline layout more flexible and convenient; and it can adapt to thermal expansion and contraction caused by temperature changes, avoiding damage or leakage caused by pipeline stress.

[0020] When dealing with gun blockage on the upper part of the first coal injection valve 6, first close the first coal injection valve 6 and the second coal injection valve 7, then use the recovery hose 8-1 to form a closed pipeline with the recovery pipeline 8, and connect the one-way valve 10 and the relief valve 9; after the connection is completed, recover the control valve 11 and the relief valve 9, and then open the first coal injection valve 6, and use the dust removal fan 15 to suck the blockage and coal powder into the dust removal hood 13 and suck them away through the dust removal pipe 14; after the treatment is completed, close the recovery control valve 11 and the relief valve 9, remove the recovery hose 8-1, open the first coal injection valve 6 and the second coal injection valve 7 to resume coal injection.

[0021] Due to the adoption of the above technical solution, the blockage and coal powder of the coal injection gun 1 can be processed and recovered into the dust removal system under the action of the dust removal fan 15, thereby avoiding the leakage of the blockage and coal powder and reducing the risk of environmental pollution and flash fire. At the same time, the original dust removal system is utilized without the need for additional dust removal equipment, thereby reducing production costs and improving equipment utilization.

[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A coal injection gun blockage treatment device, comprising a coal injection gun, wherein the coal injection gun is connected to a coal injection branch pipe through a coal injection hose, the coal injection branch pipe is connected to a spray tank through a distributor, and a first coal injection valve is arranged on the spray branch pipe, characterized in that: A second coal injection valve is arranged on the coal injection branch pipe close to the coal injection gun side, and a recovery pipeline is connected to the coal injection branch pipe between the second coal injection valve and the first coal injection valve. The outlet end of the recovery pipeline is connected to the dust removal system, and a relief valve, a one-way valve and a recovery control valve are arranged in sequence along the medium flow direction of the recovery pipeline.

2. The coal injection gun blockage treatment device according to claim 1, characterized in that: A recovery hose is arranged between the outlet end of the relief valve and the inlet end of the one-way valve via a first quick connector.

3. The coal injection gun blockage treatment device according to claim 1 or 2, characterized in that: The dust removal system includes a dust removal hood arranged at the top of the iron mouth and a dust removal pipe connected to the outlet end of the dust removal hood. A dust removal fan is arranged on the dust removal pipe. The outlet end of the recovery pipeline extends into the dust suction hood and is placed on the inlet side of the dust removal pipe.

4. The coal injection gun blockage treatment device according to claim 1, characterized in that: A coal injection gun control valve is arranged at the inlet end of the coal injection gun.

5. The coal injection gun blockage treatment device according to claim 1, characterized in that: The two ends of the coal injection hose are respectively connected to the coal injection gun and the coal injection branch pipe through a second quick-release connector.

6. The coal injection gun blockage treatment device according to claim 1, characterized in that: The recovery control valve is a ball valve.

Images