Electrode sealing device of yellow phosphorus electric furnace

Abstract

The utility model discloses a yellow phosphorus electric furnace electrode sealing device, which is characterized in that a sealing gasket is sleeved outside an electrode, one end of the sealing gasket is fixed by a sealing gasket clamping ring, the upper part of the other end of the sealing gasket is provided with an arc-shaped pressing ring, the top of the arc-shaped pressing ring is provided with a bolt fixing piece, and the bolt fixing piece is welded on a T-shaped water seal; and a water channel is arranged between the T-shaped water seal and the electrode base. The sealing gasket, the sealing gasket clamping ring and the surface of the electrode are tightly attached, loosening and fastening are achieved through the electric push rod, the sealing effect is good, automatic fire banking operation is achieved, and the problems of fire, smoke and visual pollution are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of yellow phosphorus processing, and particularly relates to a yellow phosphorus electric furnace electrode sealing device. Background Technique

[0002] In the production of phosphorus by electric furnace, the furnace charge is heated and melted in a closed and high-temperature electric furnace to undergo a reduction reaction. The heat in the reaction process is obtained by reducing the high-voltage electricity through an electric furnace transformer to a low voltage, and then introduced into the electric furnace through copper bars, short networks, copper busbars, copper tiles, and graphite electrodes. The current passes through the molten layer of the furnace charge to convert electrical energy into heat energy. The production load of the electric furnace is controlled by the lifting of the electrodes. The electrodes penetrate the furnace top and enter the furnace chamber. The electrode seal is an important auxiliary equipment in yellow phosphorus production. Its function is to seal the toxic gases in the furnace chamber and prevent gases such as phosphorus vapor and carbon monoxide generated by the reaction from being discharged, burned, and smoked from the gap between the electrode and the furnace cover, which may affect the physical health, safety, environment, and equipment of workers.

[0003] At present, the tailing grade of phosphate rock is between 15% - 17%. The grade of phosphate rock is relatively low, but the output is large. Therefore, it is mainly used for underground filling to treat goafs at present, resulting in a certain waste of resources. For this reason, the proportion of optoelectronic beneficiation and phosphate rock return beneficiation is increased to highly utilize resources. However, due to the small particle size of such phosphate rock, it is easy to cause material collapse inside the electric furnace and large fluctuations in furnace gas pressure, affecting the electrode seal of the electric furnace and the safe operation of the electric furnace.

[0004] CN218959153U discloses a yellow phosphorus electric furnace electrode sealing device. This device uses a water seal to seal the furnace gas in the furnace, and uses a sealing gland and graphite packing instead of asbestos rope to compact the filler in the gap between the electrode and the top of the water seal, avoiding the loosening of the seal caused by the displacement between the electrode and the seal and the leakage of furnace gas, improving the safety performance.

[0005] CN2221279Y discloses a yellow phosphorus electric furnace electrode sealing device. On the base of the original yellow phosphorus electric furnace electrode sealing device, a conical hopper is fixed. A sealing gasket made of insulating material is installed between the conical hopper and the base; the diameter of the bottom hole of the conical hopper is larger than the diameter of the electrode, and the inner hole diameter of the sealing gasket is equal to the diameter of the electrode; the electrode passes through the bottom hole of the conical hopper and the inner hole of the sealing gasket. The gap between the electrode and the bottom hole of the conical hopper is filled with a flexible insulating material; dry sand is installed in the conical hopper. When the electrode moves up and down, the dry sand, together with the flexible insulating material and the sealing gasket, prevents the furnace gas from escaping by its own weight, playing a sealing role.

[0006] However, in the prior art, when using a sand seal to seal the electrode, the sealing effect is poor, and a large amount of sand enters the furnace, which has an adverse impact on production control and product quality. During the lifting process of the electrode, there is irregular tilting, resulting in the loosening of the seals such as asbestos ropes in the water seal, causing furnace gas to escape. This requires frequent manual fire suppression, with a high labor intensity and a significant increase in the pressure of the charge in the furnace. As a result, there is a risk of furnace gas spraying out from the loose asbestos seal, triggering safety, environmental protection, and equipment accidents. There are also cases where, as described in Figure 1 acid ash packing is used for sealing. Due to the frequent lifting of the electrode and the processes of releasing and retracting the electrode, the acid ash compaction layer will loosen and form gaps, making it easy to catch fire and emit smoke. Therefore, the furnace maintenance workers need to frequently use insulating bars to suppress the fire. At the same time, the high temperature of the furnace gas will cause gaps to appear after the acid ash asbestos rope dries out, and watering is required to achieve a good sealing effect. Therefore, during the sealing process, there are often risks of electric shock, high-temperature scalds, and burns, as well as visual pollution problems. Summary of the Invention

[0007] In view of the above technical problems, the present utility model provides a yellow phosphorus electric furnace electrode sealing device. By using a sealing gasket, a sealing gasket clamping ring that closely fits the electrode surface, and an electric push rod to achieve loosening and fastening, it has a good sealing effect, realizes automatic fire suppression operation, and solves the problems of fire and smoke emission as well as visual pollution.

[0008] To achieve the above object, the present utility model provides a yellow phosphorus electric furnace electrode sealing device. A sealing gasket is sleeved outside the electrode. One end of the sealing gasket is fixed with a sealing gasket clamping ring, and an arc-shaped pressing ring is provided at the upper part of the other end. A bolt fixing member is provided at the top of the arc-shaped pressing ring, and the bolt fixing member is welded to the T-shaped water seal; a water channel is provided between the T-shaped water seal and the electrode base.

[0009] Preferably, the sealing gasket is made of thick silicone material that is acid and alkali resistant, high temperature resistant, and wear resistant, and is provided with spring steel wires inside.

[0010] Preferably, the sealing gasket clamping ring is composed of two semi-circular clamping rings, and the extended parts of the clamping rings are connected by clamping ring bolts.

[0011] Further preferably, an electric push rod is provided between the extended parts of the clamping rings.

[0012] Further preferably, springs are provided on the clamping ring bolts.

[0013] Preferably, the bolt fixing member includes a fixing bolt, a fixing pressing block, and an arc-shaped pressing ring; the fixing bolt passes through the fixing pressing block and is welded to the T-shaped water seal.

[0014] Further preferably, there are 8 groups of the bolt fixing members, which are evenly distributed on the outside of the sealing gasket.

[0015] Preferably, there are 4 groups of the arc-shaped pressing rings.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. A thickened silica gel support sealing gasket that is acid and alkali resistant, heat resistant up to 280°C, wear resistant, has good stretchability, and is embedded with steel wires and nylon threads is sleeved outside the electrode, and is tightly clamped and closely attached to the electrode surface through a sealing gasket clamping ring, achieving a good sealing effect. At the same time, automatic loosening and fastening are realized through an electric push rod, and with the help of the rebound of the steel wires embedded in the sealing gasket, it is convenient for the lowering and reverse movement of the electrode.

[0018] 2. After the power of the electric push rod is cut off, it automatically rebounds with the help of the spring on the clamping ring bolt, clamping the sealing gasket, achieving a good sealing effect and automatic fire suppression operation, and solving the environmental visual pollution problem of the electrode water seal emitting fire and smoke in the electric furnace cover area.

[0019] 3. The lower end of the sealing gasket is fixed to the water seal through a bolt fixing part, avoiding gaps during the lifting and lowering of the electrode, preventing the escape of high-temperature furnace gas, and at the same time, the water seal can further prevent the escape of yellow phosphorus furnace gas, reducing visual pollution.

[0020] 4. This device can achieve automatic sealing. There is no need for a furnace maintenance worker to operate near the electric furnace or the electrode. Only by remotely controlling the power on and off of the electric push rod can the sealing during the lifting and lowering process of the electrode be achieved, reducing potential safety hazards and labor intensity. Description of the Drawings

[0021] Figure 1 It is a structural schematic diagram of an acid ash packing sealing device. In the figure, 1 is the electrode, 2 is the fixing bolt, 3 is the acid ash, 4 is the water seal, 5 is the insulating pressing strip, and 6 is the water channel.

[0022] Figure 2 It is a cross-sectional view of the present utility model.

[0023] Figure 3 It is a top view of the present utility model.

[0024] Figure 4 It is a structural schematic diagram of the sealing gasket clamping ring in the present utility model. In the figure, A is the top view of the sealing gasket clamping ring, and B is the side cross-sectional view of the sealing gasket clamping ring.

[0025] Figure 5 It is a structural schematic diagram of the bolt fixing part in the present utility model.

[0026] Figure 6 It is a structural schematic diagram of the arc-shaped clamping ring in the present utility model. In the figure, A is the top view, and B is the side view.

[0027] Figure 2-6Among them, 1 is the electrode, 2 is the gasket, 3 is the gasket clamping ring, 4 is the T-shaped water seal, 5 is the fixing block, 6 is the fixing bolt, 7 is the water channel, 8 is the arc-shaped pressing ring, 9 is the electric push rod, 10 is the spring, 11 is the electrode base, 12 is the spring wire, 13 is the clamping ring, and 14 is the clamping ring bolt. Detailed implementation method

[0028] The technical solution of the present utility model will be further explained below in conjunction with the drawings and specific embodiments. It should be noted that the following embodiments are only the preferred embodiments of the present utility model and should not be construed as a limitation of the present utility model. The protection scope of the present utility model shall be subject to the content recorded in the claims. Any modifications and substitutions made by those skilled in the art to the technical solution of the present utility model without creative work fall within the protection scope of the present utility model.

[0029] Embodiment 1

[0030] As Figure 2-6 shown, a yellow phosphorus electric furnace electrode sealing device, the electrode 1 is sleeved with a gasket 2, one end of the gasket 2 is fixed on the electrode with a gasket clamping ring 3, and an arc-shaped pressing ring 8 is provided at the upper part of the other end. A bolt fixing part is provided at the top of the arc-shaped pressing ring 8, and the bolt fixing part is welded on the T-shaped water seal 4 to realize the fixation and sealing at both ends of the gasket, and prevent the leakage of furnace gas when the electrode is lifted and lowered; a water channel 7 is provided between the T-shaped water seal 4 and the electrode base 11, and water is injected into the water channel before operation to prevent the escape of yellow phosphorus furnace gas.

[0031] Preferably, the gasket 2 is made of thick silicone material that is acid and alkali resistant, high temperature resistant, wear resistant, and has good elasticity. It is provided with a spring wire 12 inside, which can be closely attached to the electrode surface and has a good sealing effect. When the gasket clamping ring 3 is loosened, the gasket 2 can quickly rebound by means of the internal spring wire 12, which is convenient for the electrode to be lowered and reversed.

[0032] Preferably, the gasket clamping ring 3 is composed of two semi-circular clamping rings 13, and the extended parts of the clamping rings 13 are connected by a clamping ring bolt 14; the semi-circular clamping rings 13 are formed into a circle by the clamping ring bolt 14 and sleeved outside the gasket. A spring 10 is provided on the clamping ring bolt 14, which can adjust the tightness of the clamping ring 13.

[0033] Further preferably, an electric push rod 9 is provided between the extended parts of the clamping ring 13. After the electric push rod 9 is powered off, it does not generate thrust on the clamping ring 13, and the automatic rebound of the spring 10 tightens the clamping ring, enhancing the clamping effect of the gasket clamping ring 3 on the gasket 2, realizing sealing and automatic fire suppression operations, and solving the visual pollution problem of the electrode water seal in the furnace cover area of the electric furnace from emitting fire and smoke.

[0034] Preferably, the bolt fixing member includes a fixing bolt 6 and a fixing pressing block 5; the fixing bolt 6 passes through the fixing pressing block 5 and is welded to the T-shaped water seal 4, and the fixing pressing block 5 is located at the top of the arc-shaped pressing ring 8. When the fixing bolt 6 is tightened, the fixing pressing block 5 presses the arc-shaped pressing ring 8, and the arc-shaped pressing ring 8 presses the gasket 2, so that the gasket 2 is closely attached to the top of the T-shaped water seal 4 to achieve sealing and prevent furnace gas from escaping.

[0035] More preferably, there are 8 groups of the bolt fixing members, which are evenly distributed outside the gasket 2, and press and fix the arc-shaped pressing ring 8 and the gasket 2 at multiple points and evenly.

[0036] Preferably, there are 4 arc-shaped pressing rings 8, and each of them is cooperated with each other through a trapezoidal structure, covering the upper part of the gasket 2 comprehensively, pressing the gasket 2 at 360°, achieving sealing and fire suppression, and avoiding leakage.

Claims

1. A yellow phosphorus electric furnace electrode sealing device, characterized in that: The electrode (1) is provided with a sealing gasket (2) on its outer sleeve. One end of the sealing gasket (2) is fixed by a sealing gasket clamp (3). The other end is provided with an arc-shaped pressing ring (8) on its upper portion. A bolt fixing part is provided on the top of the arc-shaped pressing ring (8). The bolt fixing part is welded to the T-shaped water seal (4). A water channel (7) is provided between the T-shaped water seal (4) and the electrode base (11).

2. A yellow phosphorus electric furnace electrode sealing device according to claim 1, characterized in that: The sealing gasket (2) contains a spring steel wire (12).

3. A yellow phosphorus electric furnace electrode sealing device according to claim 1, characterized in that: The sealing gasket clamping ring (3) is composed of two clamping rings (13), and the extended parts of the clamping rings (13) are connected by clamping ring bolts (14).

4. A yellow phosphorus electric furnace electrode sealing device according to claim 3, characterized in that: An electric push rod (9) is provided between the extended portions of the clamp ring (13).

5. A yellow phosphorus electric furnace electrode sealing device according to claim 3, characterized in that: A spring (10) is provided on the clamping ring bolt (14).

6. A yellow phosphorus electric furnace electrode sealing device according to claim 1, characterized in that: The bolt fixing member comprises a fixing bolt (6) and a fixing pressure block (5); the fixing bolt (6) passes through the fixing pressure block (5) and is welded to the T-shaped water seal (4).

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