Safe explosion venting device for iron-making blast furnace dust remover

Abstract

The safe explosion venting device comprises an explosion venting barrel, an explosion venting hole is formed in the top of the explosion venting barrel, a flange is connected to the periphery of the bottom of the explosion venting barrel, and a pressing plate is arranged on the outer wall, above the flange, of the explosion venting barrel in a sleeving mode; an inner cavity of the explosion venting cylinder is connected with a horizontal sealing plate, a conical hole with a wide top and a narrow bottom is formed in the center of the sealing plate, a conical valve element is arranged in the conical hole, a supporting plate is connected to the top of the conical valve element, a spring is vertically connected between the supporting plate and the top of the explosion venting cylinder, and a bottom plate is connected to the bottom of the conical valve element. When the air pressure in the iron-making blast furnace dust remover is too high, the bottom plate and the compression spring can be jacked up, so that the cone valve element is jacked out of the gap from the conical hole of the sealing plate, excessive gas in the iron-making blast furnace dust remover enters the explosion venting barrel from the gap and then leaks out of the explosion venting hole in the top of the explosion venting barrel, and the air pressure of the iron-making blast furnace dust remover is greatly reduced; therefore, the dust remover is safe and practical.

Description

Technical Field

[0001] The utility model relates to the field of safety explosion-proof equipment, in particular to a safety explosion-relief device for an iron-making blast furnace dust collector. Background Art

[0002] With the progress of society, the demand for iron resources is increasing day by day. As an important ironmaking equipment, the blast furnace can produce iron in large quantities, so it has been widely used. Blast furnace smelting is a continuous production process, and the whole process is completed in the process of mutual contact between the charge from top to bottom and the gas from bottom to top. The charge is loaded into the furnace from the top of the furnace in a certain batch, and hot air heated to 1000-1300℃ by the hot blast furnace is blown into the tuyere from the tuyere. The coke in the charge burns in front of the tuyere to produce high temperature and reducing gas, which heats the slowly descending charge during the rising process in the furnace and reduces the oxides in the iron ore to metallic iron. In the production process of the ironmaking blast furnace, a large amount of gas is generated in the furnace due to the combustion of coke. Gases such as gas enter the dust collector through the guide pipe for dust removal and storage, which increases the pressure inside the dust collector. When the pressure in the dust collector is too high, it will cause damage to the dust collector. After the dust collector is damaged, the equipment needs to be shut down for maintenance, which greatly reduces the efficiency of metal smelting. Utility Model Content

[0003] The utility model provides a safety explosion relief device for an iron-making blast furnace dust collector, aiming to solve the problem that when there is a lot of gas stored in the dust collector, the pressure is too high, which causes damage to the dust collector and reduces the metal smelting efficiency.

[0004] The utility model is a safety explosion relief device for a dust collector of an iron-making blast furnace, comprising an explosion relief tube, an explosion relief hole is provided on the top of the explosion relief tube, a flange is connected to the outer periphery of the bottom of the explosion relief tube, a pressure plate is sleeved on the outer wall of the explosion relief tube above the flange; a horizontal sealing plate is connected to the inner cavity of the explosion relief tube, a tapered hole which is wide at the top and narrow at the bottom is provided at the center of the sealing plate, a tapered valve core is provided in the tapered hole, a support plate is connected to the top of the tapered valve core, a spring is vertically connected between the support plate and the top of the explosion relief tube, and a bottom plate is connected to the bottom of the tapered valve core.

[0005] Preferably, the explosion venting hole is opened at the center of the top of the explosion venting tube.

[0006] Preferably, the flange and the pressure plate are both in the shape of annular plates.

[0007] Preferably, the pressing plate is provided with a plurality of clearance holes which are compatible with the threaded holes of the iron-making blast furnace dust collector.

[0008] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0009] 1. After the safety explosion relief device provided by the utility model is used in the dust collector of an iron-making blast furnace, when the air pressure in the dust collector of the iron-making blast furnace is too high, the bottom plate will be lifted up, and the spring will be compressed, so that the cone valve core will be pushed out of the conical hole of the sealing plate to leak out of the gap. Excessive gas in the dust collector of the iron-making blast furnace enters the explosion relief tube through the gap, and then leaks out from the explosion relief hole on the top of the explosion relief tube, which greatly reduces the air pressure of the dust collector of the iron-making blast furnace. During the smelting process, the dust collector can be automatically exhausted and depressurized to avoid damage caused by excessive pressure in the dust collector. It is safe and practical.

[0010] 2. The explosion relief device provided by the utility model, the explosion relief tube, flange, pressure plate, cone valve core, support plate, sealing plate and bottom plate are all made of stainless steel, which is sturdy and durable, with good corrosion resistance. The spring is made of spring steel with high hardness and good elasticity. The overall device is ingeniously designed, simple to manufacture and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the overall structure of the safety explosion relief device of the utility model;

[0012] Figure 2 It is a half-section schematic diagram of the safety explosion relief device of the utility model;

[0013] In the figure: 1 - explosion-relief tube; 2 - flange; 3 - pressure plate; 4 - cone valve core; 5 - spring; 6 - support plate; 7 - sealing plate; 8 - bottom plate; 9 - explosion-relief hole. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings:

[0015] like Figure 1-2 As shown, the utility model is a safety explosion relief device for a dust collector of an iron-making blast furnace, comprising a cylindrical explosion relief tube 1, an explosion relief hole 9 is provided at the center of the top of the explosion relief tube 1, an annular plate-shaped flange 2 is connected to the outer periphery of the bottom of the explosion relief tube 1, an annular plate-shaped pressing plate 3 is sleeved on the outer wall of the explosion relief tube 1 above the flange 2, and the pressing plate 3 is provided with six clearance holes adapted to the threaded holes of the dust collector of the iron-making blast furnace; a horizontal sealing plate 7 is welded to the inner cavity of the explosion relief tube 1, a tapered hole with a wide top and a narrow bottom is provided at the center of the sealing plate 7, a cone valve core 4 is sealed in the tapered hole, a support plate 6 is welded to the top of the cone valve core 4, a spring 5 is vertically welded between the support plate 6 and the top of the explosion relief tube 1, and a bottom plate 8 is welded to the bottom of the cone valve core 4. Among them, the explosion relief tube 1, the flange 2, the pressing plate 3, the cone valve core 4, the support plate 6, the sealing plate 7 and the bottom plate 8 are all made of stainless steel, the spring 5 is made of spring steel, and the spring 5 is in a compressed state.

[0016] Before pressure relief, the safety explosion relief device of the present application is first installed on the iron-making blast furnace dust collector. During installation, the explosion relief tube 1 is inserted from the reserved hole of the iron-making blast furnace dust collector, so that the flange 2 fits with the inner wall of the iron-making blast furnace dust collector, and then the pressure plate 3 is sleeved on the outer wall of the explosion relief tube 1, so that the pressure plate 3 fits with the iron-making blast furnace dust collector, and finally a screw is passed through the clearance hole of the pressure plate 3 and tightened in the threaded hole of the iron-making blast furnace dust collector to fix the safety explosion relief device.

[0017] During pressure relief, when the air pressure in the iron-making blast furnace dust collector is too high, the bottom plate 8 will be lifted up, compressing the spring 5, so that the cone valve core 4 will be pushed out of the conical hole of the sealing plate 7 to leak out of the gap. At this time, the excess gas in the iron-making blast furnace dust collector will enter the explosion-proof tube 1 through the gap, and then leak out from the explosion-proof hole 9 at the top of the explosion-proof tube 1, thereby reducing the air pressure in the iron-making blast furnace dust collector. When the air pressure in the iron-making blast furnace dust collector drops to a safe value, the spring 5 will reset and press down the support plate 6, driving the cone valve core 4 to reseal and compress the conical hole of the sealing plate 7, and stop the explosion relief. The safety explosion relief device for the iron-making blast furnace dust collector of the present application can automatically exhaust and relieve the pressure inside the dust collector to avoid damage caused by excessive pressure in the dust collector.

Claims

1. A safety explosion relief device for an ironmaking blast furnace dust collector, characterized in that: The invention comprises an explosion-proof tube (1), wherein an explosion-proof hole (9) is formed at the top of the explosion-proof tube (1), a flange (2) is connected to the outer periphery of the bottom of the explosion-proof tube (1), and a pressure plate (3) is sleeved on the outer wall of the explosion-proof tube (1) above the flange (2); a horizontal sealing plate (7) is connected to the inner cavity of the explosion-proof tube (1), a tapered hole which is wider at the top and narrower at the bottom is formed at the center of the sealing plate (7), a tapered valve core (4) is provided in the tapered hole, a support plate (6) is connected to the top of the tapered valve core (4), a spring (5) is vertically connected between the support plate (6) and the top of the explosion-proof tube (1), and a bottom plate (8) is connected to the bottom of the tapered valve core (4).

2. The safety explosion relief device for an ironmaking blast furnace dust collector according to claim 1, characterized in that: The explosion relief hole (9) is opened at the top center of the explosion relief tube (1).

3. A safety explosion relief device for an ironmaking blast furnace dust collector as claimed in claim 1 or 2, characterized in that: The flange (2) and the pressure plate (3) are both in the shape of an annular plate.

4. The safety explosion relief device for an ironmaking blast furnace dust collector according to claim 3, characterized in that: The pressing plate (3) is provided with a plurality of clearance holes adapted to the threaded holes of the ironmaking blast furnace dust collector.

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