Spray gun muzzle smoke sealing device

Abstract

The utility model discloses a spray gun mouth flue gas sealing device which comprises a flue gas sealing cylinder and a flue gas sealing groove, the flue gas sealing groove is installed at a furnace top spray gun installation opening, sealing liquid is contained in the flue gas sealing groove, and the flue gas sealing cylinder is divided into a spray gun sleeving section and a flue gas sealing section. The diameter of the flue gas sealing section is greater than that of the spray gun sleeving section; and the smoke sealing section is inserted into the smoke sealing groove and is immersed below the liquid level. A liquid inlet pipe and a liquid return pipe are arranged on the outer side wall of the smoke sealing groove, and the liquid inlet pipe is located above the liquid return pipe. The liquid sealing mode is adopted, smoke is prevented from escaping, the use cost is reduced, and the liquid sealing device has the advantages of being simple in structure, high in practicability and easy to disassemble and replace.

Description

Technical Field

[0001] This utility model relates to a flue gas sealing device, specifically a flue gas sealing device for a spray gun nozzle. Background Technology

[0002] During normal production, pulverized coal injection lances inject the fuel required for the reaction into the furnace. However, due to fluctuations in the amount of material and unstable negative pressure in the furnace, some unorganized flue gas often escapes to the outside through the nozzles of the lances. This is not conducive to the daily inspection and operation of the personnel on duty, and also causes pollution to the production environment.

[0003] A search revealed CN202221763377.9, which discloses a flue gas sealing structure. This structure includes an outlet pipe extending through a furnace wall and a sealing body disposed on the outside of the furnace wall and surrounding the outlet pipe. The sealing body, the outer wall of the outlet pipe, and the outer wall surface of the furnace wall form a sealing cavity. Sealant is provided in the sealing cavity. The sealing body includes a first body and a second body, each having a U-shaped groove and circumferentially connected to each other. Each U-shaped groove is configured to fit against the outer wall surface of the outlet pipe. In this invention, the flue gas is directly sealed by the sealant in the sealing cavity, without contacting the sealing body, thus avoiding corrosion of the sealing body by acidic flue gas and effectively preventing flue gas leakage. The split design of the sealing body eliminates the need to cut the outlet pipe during installation, making installation convenient.

[0004] However, after the above-mentioned flue gas sealing device is applied to the top-blown smelting furnace, the sealing body will corrode and fail over time. Once the furnace pressure fluctuates, the flue gas will overflow from the joint between the two halves of the sealing body. To ensure this, the sealant needs to be replaced frequently, which is not conducive to the stable operation of the top-blown smelting process and cost reduction. Utility Model Content

[0005] The purpose of this utility model is to provide a spray gun nozzle smoke sealing device that is simple in structure, low in cost, and highly practical, so as to solve the problems existing in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A flue gas sealing device for a spray gun nozzle includes a flue gas sealing cylinder and a flue gas sealing groove. The flue gas sealing groove is installed at the spray gun mounting port on the furnace top and contains sealing liquid. The flue gas sealing cylinder is divided into a spray gun sleeve section and a flue gas sealing section, with the diameter of the flue gas sealing section being larger than the diameter of the spray gun sleeve section. The flue gas sealing section is inserted into the flue gas sealing groove and submerged below the liquid surface. An inlet pipe and a return pipe are provided on the outer wall of the flue gas sealing groove, with the inlet pipe located above the return pipe.

[0008] This utility model is mainly used for the treatment of fugitive flue gas at the nozzle of a spray gun during metallurgical furnace production. It can be manufactured according to on-site measurements. The flue gas sealing cylinder is fitted onto the spray gun and then inserted into a flue gas sealing groove pre-filled with clean water, achieving the effect of sealing fugitive flue gas. This utility model has a simple structure, strong practicality, and is easy to disassemble and replace, possessing excellent application prospects and practical value. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0010] Figure 2 for Figure 1 A cross-sectional view of the AA structure.

[0011] Figure 3 This is a three-dimensional structural view of the present invention.

[0012] In the diagram, 1-Flue gas sealing cylinder, 2-Flue gas sealing groove, 3-Spray gun sleeve section, 4-Flue gas sealing section, 5-Liquid inlet pipe, and 6-Liquid return pipe. Detailed Implementation

[0013] The present invention will be further explained below with reference to the accompanying drawings.

[0014] like Figure 1-3 As shown, a flue gas sealing device for a spray gun nozzle includes a flue gas sealing cylinder 1 and a flue gas sealing groove 2. The flue gas sealing groove 2 is installed at the spray gun mounting port on the furnace top and is filled with sealing fluid. The flue gas sealing cylinder 1 is divided into a spray gun sleeve section 3 and a flue gas sealing section 4, and the diameter of the flue gas sealing section 4 is larger than the diameter of the spray gun sleeve section 3. An inlet pipe 5 and a return pipe 6 are provided on the outer wall of the flue gas sealing groove 2, with the inlet pipe 5 located above the return pipe 6. In use, the spray gun sleeve section 3 is fitted onto the spray gun, and the flue gas sealing section 4 is inserted into the flue gas sealing groove 2 and submerged below the liquid surface.

[0015] First, according to the dimensions of the spray gun installation port and the diameter of the spray gun on the furnace top, a flue gas sealing cylinder 1 and a flue gas sealing groove 2 that meet the requirements are designed and manufactured. Then, the flue gas sealing cylinder 1 is fitted onto the spray gun and inserted into the flue gas sealing groove 2. Subsequently, sealing fluid is injected into the flue gas sealing groove 2 through the liquid inlet pipe 5 until the sealing fluid covers the lower edge of the flue gas sealing cylinder 1. Refractory insulation cotton is used to seal the connection between the flue gas sealing cylinder 1 and the spray gun. The sealing fluid can be clean water or an alkaline liquid (such as sodium carbonate or sodium bicarbonate solution) depending on the flue gas conditions. After a period of time, depending on the turbidity of the sealing fluid, the return pipe 6 is opened to recover the sealing fluid, and the sealing fluid is re-injected through the liquid inlet pipe 5. In addition, to prevent the spray gun from tripping due to furnace pressure fluctuations, a traction lug can be welded to the top of the flue gas sealing cylinder 1, and a chain is used to connect the traction lug to the spray gun body traction lug.

Claims

1. A fume seal for a lance, characterized in that It includes a flue gas sealing cylinder (1) and a flue gas sealing groove (2). The flue gas sealing groove (2) is installed at the nozzle of the spray gun on the top of the furnace and is filled with sealing liquid. The flue gas sealing cylinder (1) is divided into a spray gun sleeve section (3) and a flue gas sealing section (4). The diameter of the flue gas sealing section (4) is larger than the diameter of the spray gun sleeve section (3). The flue gas sealing section (4) is inserted into the flue gas sealing groove (2) and submerged below the liquid surface.

2. The nozzle gas sealing device as described in claim 1, characterized in that, The flue gas sealing groove (2) is provided with an inlet pipe (5) and a return pipe (6) on its outer wall, and the inlet pipe (5) is located above the return pipe (6).

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