Harmful gas leakage prevention sealing device of high-temperature rotary kiln for smelting

Abstract

The invention discloses a sealing device for preventing harmful gas leakage of a high-temperature rotary kiln for smelting, which belongs to the technical field of leakage prevention and environmental protection, and comprises a flange plate I hermetically fixed with the periphery of a kiln body, an annular wear-resistant plate arranged on one side, facing a negative pressure cover, of the flange plate I, and an elastic sealing ring pre-pressed between the wear-resistant plate and the flange plate I, the second flange plate is fixed to the end portion of the end, facing the wear-resisting disc, of the negative pressure cover in a sealed mode, and the annular self-lubricating grinding disc is fixed to the side, facing the wear-resisting disc, of the second flange plate in a sealed mode. The self-lubricating millstone is provided with a second abrasion plane, the first abrasion plane and the second abrasion plane are attached and pressed, and continuous attaching pressure is provided by the pre-pressed elastic sealing ring.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of high-temperature rotary kiln for smelting harmful gas leakage tight device, belong to the field of leakage prevention environmental protection. BACKGROUND

[0002] In the smelting process, high-temperature rotary kiln must be rotating, to promote the furnace charge in the furnace from the end of the pipe with the way of flow to the other end of the rotary kiln.In the smelting process of recovering useful substances in iron slag, iron slag is melted into a molten state in the high-temperature furnace, which will form a gas containing lead, zinc and sulfur, which will enter the specified recovery device under the action of negative pressure in the pipe to condense and recover valuable lead, zinc and other materials.But in the actual production process, the negative pressure in the pipe cannot make the gas containing lead, zinc and sulfur completely enter the designated recovery treatment device, and often leaks out of the two ends of the pipe, causing serious environmental pollution, is one of the key monitoring projects of environmental pollution sources, and often suffers from the punishment of relevant departments and is forced to stop production and rectification.

[0003] As shown in Figure 1 , 2 , take the negative pressure recovery of the rear end of the rotary kiln as an example, the kiln body 100 of the rotary kiln is cylindrical, the rear end is provided with a negative pressure cover 200, the conveying pipe 300 for conveying and processing materials is inserted into the furnace pipe 110 at the rear end of the rotary kiln from the rear end plate of the negative pressure cover 200, and the negative pressure cover 200 is provided with an exhaust pipe 210 connected to the flue gas recovery device, and the front end of the negative pressure cover 200 and the outer peripheral surface of the kiln body 100 can only be implemented as a movable seal, because the kiln body 100 is rotating, while the negative pressure cover 200 is fixed.

[0004] The way of movable seal between the front end of the negative pressure cover 200 and the outer peripheral surface of the kiln body 100 is to set a front end plate at the front end of the negative pressure cover 200, and set a sleeve hole 220 on the front end plate, which is sleeved on the outer peripheral surface of the kiln body 100, so that the hole diameter of the sleeve hole 220 is as close as possible to the outer diameter of the kiln body 100, and the inner circle surface of the sleeve hole 220 is as close as possible to the outer peripheral surface of the kiln body 100.But due to the continuous rotation of the kiln body 100, combined with the large diameter of the kiln body 100 and the deformation caused by high temperature and gravity, it is difficult to make the outer peripheral surface of the kiln body 100 a high-precision circle, even if the outer convexity is extremely small, it will form a heavy pressure friction on the inner circle surface of the sleeve hole 220 in the long-term rotation, so that the hole diameter of the sleeve hole 220 increases due to wear, and the inner circle surface of the sleeve hole 220 and the outer peripheral surface of the kiln body 100 inevitably form an air gap 1200.The existence of this air gap 1200 will cause the harmful gas in the furnace pipe 110 to leak out of the air gap 1200 when the negative pressure in the negative pressure cover 200 fluctuates slightly. SUMMARY

[0005] The technical problem to be solved by the present application is how to realize the movable sealing between the negative pressure cover and the outer peripheral surface of the kiln body without air permeability.

[0006] To solve the above problems, the technical solution provided by the present application is: A sealing device for preventing harmful gas leakage of a high-temperature rotary kiln for smelting, comprising a flange plate one fixedly sealed with the outer periphery of the kiln body, an annular wear plate provided on the side of the flange plate one facing the negative pressure cover, an elastic sealing ring pre-pressed between the wear plate and the flange plate one, a flange plate two sealingly fixed at the end of the negative pressure cover facing the wear plate, an annular self-lubricating wear plate sealingly fixed on the side of the flange plate two facing the wear plate, a circumferential restraint provided between the wear plate and the flange plate one to enable synchronous rotation of the wear plate and the flange plate one, the wear plate having a wear flat one, and the self-lubricating wear plate having a wear flat two, the wear flat one being in close contact with the wear flat two, and the continuous close contact force being provided by the pre-pressed elastic sealing ring.

[0007] The circumferential restraint is a plurality of limiting columns axially provided in the inner ring region of the flange plate one, and a plurality of guide limiting holes are provided in the inner ring region of the wear plate corresponding to the limiting columns, each limiting column being sleeved in the corresponding guide limiting hole and being capable of axially sliding in the guide limiting hole.

[0008] An installation flange is sealingly fixed on the outer periphery of the kiln body, and an extension sleeve for heat dissipation is provided on the side of the flange plate one opposite to the wear plate, the extension end of the extension sleeve being sealingly fixed with the installation flange.

[0009] An annular sealing groove is provided on the flange plate one, and a part of the elastic sealing ring is sunk into the sealing groove.

[0010] A structure is provided on the wear plate to enable the wear flat one to discharge water, so that a sealing water film is formed between the wear flat one and the wear flat two when the wear flat one rotates.

[0011] An annular water outlet groove axially deep into the wear flat one is provided on the wear flat one, and a radial water storage groove is provided around the outer periphery of the wear plate, the water outlet groove and the water storage groove being communicated through a water passing hole, and the water stored in the water storage groove being supplied to the water outlet groove through the water passing hole.

[0012] An arc-shaped water baffle is provided on the water storage groove, and a plurality of transverse partitions are provided in the water storage groove to divide the water storage groove into a plurality of independent water storage chambers, each water storage chamber being provided with a water inlet on the water baffle, and each water storage chamber and the water outlet groove being provided with a water passing hole, the diameter of the water inlet being larger than the diameter of the water passing hole.

[0013] A water taking groove is provided below the wear plate, and the water storage chamber and the corresponding water inlet in the lower part of the wear plate can be completely immersed in the water surface of the water taking groove from one end of the water taking groove, and then the water surface is turned out from the other end of the water taking groove, and the water in the water taking groove can be filled into the water storage chamber through the water inlet.

[0014] An elastic annular water absorbing cotton is arranged in the annular water outlet groove, and the outer side of the annular water absorbing cotton is always attached to the wear plane two of the self-lubricating grinding disc.

[0015] The bottom area of the water outlet groove is expanded to form an annular residual liquid cavity, which is used to supply water to the water outlet groove at the corresponding position from the residual liquid cavity when the water inlet is downward, the corresponding water storage cavity, the water passing hole and the water outlet groove at the corresponding position are used to pour water outward, so as to ensure that the annular water absorbing cotton maintains sufficient water content, the inner end of the annular water absorbing cotton extends into the residual liquid cavity, and the part of the annular water absorbing cotton located in the residual liquid cavity is an expanded limiting flange, and the expanded limiting flange can completely fill the residual liquid cavity. Advantages

[0016] By designing the combination part of the negative pressure cover and the kiln body as the wear plane one of the wear-resistant disc and the wear plane two of the self-lubricating grinding disc, and providing a continuous pressing force by the elastic sealing ring, a very small gap between the wear plane one and the wear plane two can be maintained at all times, and as long as the negative pressure does not disappear or form a reverse positive pressure, the negative pressure inside the negative pressure cover can be ensured not to leak gas; by arranging a water sealing structure on the wear-resistant disc, a water sealing film can be further formed between the wear plane one and the wear plane two, so that even if the negative pressure disappears or forms a reverse positive pressure, the wear plane one and the wear plane two can be absolutely guaranteed not to leak gas; the sealing water film 10 formed between the wear plane one and the wear plane two becomes a good lubricant, greatly reducing the wear between the wear-resistant disc and the self-lubricating grinding disc, and significantly improving the service life of the wear-resistant disc and the self-lubricating grinding disc; the use of water can significantly reduce the temperature of related components such as the washing water cotton and the elastic sealing ring, and prolong the service life of such components. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Schematic diagram of the movable joint structure between the fixed negative pressure cover and the rotating kiln body in the prior art; Figure 2 Schematic diagram of the disassembly of the negative pressure cover and the kiln body in the prior art; Figure 3 Schematic diagram of the sealing device according to Embodiment One of the present application; Figure 4 Schematic diagram of the disassembly of the negative pressure cover and the self-lubricating grinding disc according to Embodiment One of the present application; Figure 5 Schematic diagram of the sealing solid of the mounting flange on the kiln body according to Embodiment One of the present application; Figure 6 Schematic diagram of the disassembly of the wear-resistant disc, the elastic sealing ring and the flange disc one according to Embodiment One of the present application; Figure 7A sectional view of the sealing device according to Embodiment One of the present application; Figure 8 A sectional view of the sealing device according to Embodiment Two of the present application; Figure 7 A sectional view of the sealing device according to Embodiment Two of the present application; Figure 9 A sectional view of the sealing device according to Embodiment Two of the present application; Figure 10 A sectional view of the sealing device according to Embodiment Two of the present application; Figure 11 A sectional view of the sealing device according to Embodiment Two of the present application; Figure 12 A sectional view of the sealing device according to Embodiment Two of the present application; Figure 13 A sectional view of the sealing device according to Embodiment Two of the present application; Figure 12 An enlarged view of the upper circle range, with the annular water-absorbing cotton not shown in the figure; Figure 14 An enlarged view of the upper circle range, with the annular water-absorbing cotton not shown in the figure; Figure 12 An enlarged view of the upper circle range, with the annular water-absorbing cotton shown in the figure; Figure 15 An enlarged view of the lower circle range. Figure 12

[0018] In the figure: 1, flange plate one; 101, limiting column; 102, sealing groove; 2, wear-resistant disc; 201, wear plane one; 202, water outlet groove; 203, water passing hole; 204, water storage cavity; 2041, transverse partition; 205, liquid retention cavity; 206, water baffle; 2061, water inlet; 207, screw; 208, guide limiting hole; 3, elastic sealing ring; 4, mounting flange; 5, extension sleeve; 6, annular water-absorbing cotton; 601, limiting flange; 7, flange plate two; 8, self-lubricating wear-resistant disc; 801, wear plane two; 9, water taking groove; 900, liquid level; 901, water supplement inlet; 902, overflow outlet; 10, sealing water film; 100, kiln body; 110, furnace tube; 200, negative pressure cover; 210, air suction pipe; 220, sleeve hole; 1200, air passing gap; 300, conveying pipe. DETAILED DESCRIPTION

[0019] The present application will be further described below in conjunction with embodiments and the accompanying drawings: Embodiment One (shown in the accompanying drawings) Figure 3 ​​The application discloses a sealing device for preventing harmful gas leakage of a high-temperature rotary kiln for smelting, which comprises a flange plate 1 fixedly sealed with the outer periphery of a kiln body 100, an annular wear plate 2 arranged on the side of the flange plate 1 facing a negative pressure cover 200, an elastic sealing ring 3 pre-pressed between the wear plate 2 and the flange plate 1, a flange plate 7 sealingly fixed at the end of the negative pressure cover 200 facing the wear plate 2, and an annular self-lubricating wear plate 8 sealingly fixed on the side of the flange plate 7 facing the wear plate 2. A circumferential constraint member is arranged between the wear plate 2 and the flange plate 1, so that the wear plate 2 and the flange plate 1 rotate synchronously. The wear plate 2 is provided with a wear plane 201, and the self-lubricating wear plate 8 is provided with a wear plane 801. The wear plane 201 and the wear plane 801 are in close contact and are provided with a continuous pressing force by the pre-pressed elastic sealing ring 3. The self-lubricating wear plate 8 is sealingly fixed with the negative pressure cover 200 and is static under working conditions. The wear plate 2 is sealingly arranged with the kiln body 100 of the rotary kiln and is constrained by the circumferential constraint member. Under working conditions, the wear plate 2 rotates with the kiln body 100 of the rotary kiln, that is, the wear plane 201 of the wear plate 2 and the wear plane 801 of the self-lubricating wear plate 8 are in close contact and relatively rotate. Due to the continuous pressing force provided by the elastic sealing ring 3, the gap between the wear plane 201 and the wear plane 801 is extremely small. Even if the negative pressure in the negative pressure cover 200 fluctuates, as long as the negative pressure disappears or forms a reverse positive pressure, the active joint part between the negative pressure cover 200 and the kiln body 100 of the rotary kiln will not leak harmful gas. Due to the continuous pressing force provided by the elastic sealing ring 3, even if the wear plane 201 of the wear plate 2 and the wear plane 801 of the self-lubricating wear plate 8 are worn, the extremely small gap between the wear plane 201 and the wear plane 801 will not be enlarged, so that the wear plane 201 and the wear plane 801 can be closely contacted for a long time. Compared with the prior art, the large air gap 1200 is formed and exists for a long time, and the requirement of preventing harmful gas leakage under negative pressure can be fully met.

[0020] The wear plate 2 is made of a wear-resistant and processable metal material, such as steel, alloy or the like, and the self-lubricating wear plate 8 is made of a self-lubricating high polymer material in the prior art.

[0021] The circumferential constraint member is a plurality of limiting columns 101 axially arranged in the inner ring region of the flange plate 1. A plurality of guide limiting holes 208 are arranged in the inner ring region of the wear plate 2 corresponding to the limiting columns 101. Each limiting column 101 is sleeved in the corresponding guide limiting hole 208 and can axially slide in the guide limiting hole 208. In this way, when the flange plate 1 rotates, the limiting column 101 drives the wear plate 2 to rotate. When the wear plane 201 and the wear plane 801 are worn, the wear plate 2 can be pushed by the elastic sealing ring 3 to the self-lubricating wear plate 8, so that the wear plane 201 and the wear plane 801 are continuously kept in close contact.

[0022] A mounting flange 4 is fixedly mounted on the outer periphery of the kiln body 100. An extending sleeve 5 for heat dissipation is arranged on the side of the flange plate 1 opposite to the wear plate 2. The extending end of the extending sleeve 5 is fixedly mounted with the mounting flange 4. Since the temperature in the furnace of the kiln body 100 is as high as about 2000 degrees, although the furnace wall is heat-insulated, the temperature outside the kiln body 100 is still very high. Directly connecting the wear plate 2 and the flange plate 1 with the mounting flange 4 close to the kiln body 100 will result in the temperature of the wear plate 2 and the flange plate 1 being too high, which will easily cause the elastic sealing ring 3 between the wear plate 2 and the flange plate 1 to age and lose elasticity. The use of the extending sleeve 5 can achieve a significant heat dissipation effect.

[0023] The flange plate 1 is provided with an annular sealing groove 102. A part of the elastic sealing ring 3 is sunk into the sealing groove 102, so as to limit the elastic sealing ring 3 by the flange plate 1.

[0024] Embodiment 2 (attached Figure 9 as shown in Fig. 15) It is a further improvement of the embodiment 1. The wear plate 2 is provided with a structure for supplying water to the wear plane 201, so as to form a sealing water film 10 between the wear plane 201 and the wear plane 2 801 when the wear plane 201 rotates. Since there is a long time friction under pressure between the wear plane 201 and the wear plane 2 801, it will result in wear debris between the wear plane 201 and the wear plane 2 801, which will cause a very small gap between the wear plane 201 and the wear plane 2 801. Therefore, in the case that the negative pressure in the negative pressure cover 200 is unstable, the negative pressure disappears or even forms a reverse positive pressure, the gas can still leak. The embodiment further forms a sealing water film 10 between the wear plane 201 and the wear plane 2 801 when the wear plane 201 rotates, so as to completely eliminate the gas leakage between the wear plane 201 and the wear plane 2 801 in this case.

[0025] An axially deep annular water outlet groove 202 is arranged on the wear plane 201 of the wear plate 2. A radial deep water storage groove is arranged around the wear plate 2. The water outlet groove 202 and the water storage groove are communicated through a water passing hole 203. An arc-shaped water baffle 206 is arranged on the water storage groove. A plurality of transverse partitions 2041 are arranged in the water storage groove, so as to divide the water storage groove into a plurality of independent water storage chambers 204. Each water storage chamber 204 is correspondingly provided with a water inlet 2061 on the water baffle 206. Each water storage chamber 204 is provided with a water passing hole 203 between the water outlet groove 202. The diameter of the water inlet 2061 is larger than that of the water passing hole 203. In use, water enters the water storage chamber 204 through the water inlet 2061. The water stored in the water storage groove is supplied to the water outlet groove 202 through the water passing hole 203. The water in the water outlet groove 202 directly flows between the wear plane 201 and the wear plane 2 801.

[0026] For the convenience of processing and assembling, the arc-shaped water baffle 206 is divided into two equal halves, which can be fixed on the outer periphery of the wear-resistant disc 2 by screws 207.

[0027] A water taking groove 9 is arranged below the wear-resistant disc 2. The water storage cavity 204 at the lower part of the wear-resistant disc 2 and the corresponding water inlet 2061 can be completely immersed in the water surface 900 of the water taking groove 9 from one end of the water taking groove 9, and then turned out of the water surface 900 from the other end of the water taking groove 9. The water in the water taking groove 9 can be filled into the water storage cavity 204 through the water inlet 2061.

[0028] The water taking groove 9 is provided with a water supplementing port 901 and a water overflow port 902 at a set water level.

[0029] A flexible annular water absorbing cotton 6 is arranged in the annular water outlet groove 202. The outer side of the annular water absorbing cotton 6 is always in contact with the wear plane two 801 of the self-lubricating grinding disc 8. In the working condition, the annular water absorbing cotton 6 can brush water on the wear plane two 801 like a brush pen head when the wear-resistant disc 2 rotates. The water brushed on the wear plane two 801 flows under the action of gravity and rotates with the wear plane one 201, so as to form a sealed water film 10 between the wear plane one 201 and the wear plane two 801.

[0030] Further, the bottom area of the water outlet groove 202 is expanded into a ring-shaped liquid retention cavity 205. When the water inlet 2061 faces downward, the corresponding water storage cavity 204, water passing hole 203 and the water outlet groove 202 at the corresponding position pour water outward, the liquid retention cavity 205 supplies water to the water outlet groove 202 at the position to ensure that the annular water absorbing cotton 6 maintains sufficient water content. The inner end of the annular water absorbing cotton 6 extends into the liquid retention cavity 205. The part of the annular water absorbing cotton 6 in the liquid retention cavity 205 is an expanded limiting flange 601. The expanded limiting flange 601 can completely fill the liquid retention cavity 205, so as to ensure that the annular water absorbing cotton 6 does not move inward and outward in the water outlet groove 202.

[0031] Now we will briefly describe the application process and principle of the embodiment: The self-lubricating grinding disc 8 is fixed statically to the negative pressure cover 200. The wear-resistant disc 2 rotates with the kiln body 100 under the restriction of the limiting post 101. The wear surface 201 of the wear-resistant disc 2 is pressed against the wear surface 801 of the self-lubricating grinding disc 8 and rotates. When a certain water storage cavity 204 and its corresponding water inlet 2061 at the lower part of the wear-resistant disc 2 are completely submerged below the water level 900 in the water intake trough 9 from one end, the water in the water intake trough 9 is poured into the water storage cavity 204 through the water inlet 2061. As the wear-resistant disc 2 continues to rotate, the water storage chamber 204, which has just been filled with water, and its inlet 2061 rotate upward from the other end of the water intake trough 9 to the water surface and continue to rotate upward to the top. During this process, the inlet 2061 always faces upward. The water in the water storage chamber 204 enters the liquid retention cavity 205 and the water outlet trough 202 through the water hole 203, and is supplied to the annular absorbent cotton 6 in the water outlet trough 202 to brush water onto the wear surface 801. As the wear-resistant disc 2 continues to rotate, the inlet 2061 of the water storage chamber 204 gradually tilts downward, and the water in the water storage chamber 204 begins to pour out through the inlet 2061. This process will last for more than ten seconds, and the water in the water storage chamber 204 will be basically emptied. The water in the outlet trough 202 also begins to flow back into the water storage chamber 204 through the water hole 203. Due to the small diameter of the water hole 203 and the obstruction effect of the annular absorbent cotton 6, very little water flows out of the outlet trough 202 into the water storage chamber 204. Since the water in the liquid retention cavity 205 is used for replenishment, it will not affect the continuous brushing of water by the annular absorbent cotton 6 onto the wear surface 801.

[0032] Due to the high temperature of the rotary kiln under operating conditions, although the wear-resistant disc 2 and the self-lubricating disc 8 are isolated from the kiln body, they still maintain a high temperature due to heat radiation. The application of water in the liquid seal structure, while forming a sealing water film 10, also plays a role in cooling. The water carried out by the wear-resistant disc 2 and the self-lubricating disc 8 after being submerged in the water tank 9 will carry away a large amount of heat in the form of evaporation, which can further reduce the temperature of related components such as the annular absorbent cotton 6 and the elastic sealing ring 3, and extend the service life of these components that are prone to aging at high temperatures.

[0033] In addition, the sealing water film 10 formed between the first wear surface 201 and the second wear surface 801 also serves as a good lubricant, greatly reducing wear between the wear-resistant disc 2 and the self-lubricating disc 8, and improving the service life of the wear-resistant disc 2 and the self-lubricating disc 8.

[0034] The above embodiments are only used to describe the present invention more clearly, and should not be regarded as limiting the scope of protection covered by the present invention. Any equivalent modifications should be regarded as falling within the scope of protection covered by the present invention.

Claims

1. A sealing device for preventing the leakage of harmful gases in a high-temperature rotary kiln used in smelting, characterized in that: The system includes a flange (1) that is sealed and fixed to the outer periphery of the kiln body (100), an annular wear-resistant disc (2) located on the side of the flange (1) facing the negative pressure hood, an elastic sealing ring (3) pre-pressed between the wear-resistant disc (2) and the flange (1), a flange (7) that is sealed and fixed to one end of the negative pressure hood (200) facing the wear-resistant disc (2), an annular self-lubricating grinding disc (8) that is sealed and fixed to the side of the flange (7) facing the wear-resistant disc (2), and a circumferential constraint member is provided between the wear-resistant disc (2) and the flange (1) to ensure that the wear-resistant disc (2) and the flange (1) are properly aligned. The first disc (1) rotates synchronously, the wear-resistant disc (2) has a wear surface (201), and the self-lubricating disc (8) has a wear surface (801). The first wear surface (201) and the second wear surface (801) are pressed together, and the pre-pressed elastic sealing ring (3) provides continuous pressure. There is a sealing and fixed mounting flange (4) on the outer periphery of the kiln body (100). On the side of the first flange (1) opposite to the wear-resistant disc (2), there is an extension sleeve (5) for heat dissipation. The extension end of the extension sleeve (5) is sealed and fixed to the mounting flange (4).

2. The sealing device for preventing harmful gas leakage in a high-temperature rotary kiln for smelting according to claim 1, characterized in that: The circumferential constraint is a plurality of limiting posts (101) axially arranged in the inner ring area of ​​the flange (1). A plurality of guide limiting holes (208) are provided in the inner ring area of ​​the wear-resistant disc (2) corresponding to the limiting posts (101). Each limiting post (101) is fitted in the corresponding guide limiting hole (208) and can slide axially in the guide limiting hole (208).

3. The sealing device for preventing harmful gas leakage in a high-temperature rotary kiln for smelting according to claim 1, characterized in that: The flange (1) is provided with an annular sealing groove (102), and a portion of the elastic sealing ring (3) is embedded in the sealing groove (102).

4. The sealing device for preventing harmful gas leakage in a high-temperature rotary kiln for smelting according to claim 1, characterized in that: The wear-resistant disc (2) is provided with a structure that allows water to flow out from the first wear surface (201), so that a sealed water film (10) is formed between the first wear surface (201) and the second wear surface (801) when the first wear surface (201) rotates.

5. The sealing device for preventing harmful gas leakage in a high-temperature rotary kiln for smelting according to claim 4, characterized in that: An axially extending annular water outlet groove (202) is provided on the wear plane (201) of the wear-resistant disc (2). The outer periphery of the annular wear-resistant disc (2) has a radially extending water storage groove. The water outlet groove (202) and the water storage groove are connected through a water passage hole (203). The water stored in the water storage groove is supplied to the water outlet groove (202) through the water passage hole (203).

6. The sealing device for preventing harmful gas leakage in a high-temperature rotary kiln for smelting according to claim 5, characterized in that: An arc-shaped baffle (206) is provided on the opening of the water storage tank. Multiple transverse partitions (2041) are provided inside the water storage tank to divide the water storage tank into multiple independent water storage chambers (204). Each water storage chamber (204) has a corresponding water inlet (2061) on the baffle (206). Each water storage chamber (204) is connected to the water outlet (202) by a water passage hole (203). The diameter of the water inlet (2061) is larger than the diameter of the water passage hole (203).

7. The sealing device for preventing harmful gas leakage in a high-temperature rotary kiln for smelting according to claim 6, characterized in that: A water intake trough (9) is provided below the wear-resistant disc (2). The water storage chamber (204) and its corresponding water inlet (2061) at the bottom of the wear-resistant disc (2) can be completely submerged below the water surface (900) of the water intake trough (9) from one end of the water intake trough (9) and then exited from the water surface (900) from the other end of the water intake trough (9). The water in the water intake trough (9) can be poured into the water storage chamber (204) through the water inlet (2061).

8. The sealing device for preventing harmful gas leakage in a high-temperature rotary kiln for smelting according to claim 5, characterized in that: An elastic annular absorbent cotton (6) is provided in the annular water outlet groove (202), and the outer side of the annular absorbent cotton (6) is always in contact with the wear plane (801) of the self-lubricating grinding disc (8).

9. The sealing device for preventing harmful gas leakage in a high-temperature rotary kiln for smelting according to claim 5, characterized in that: The bottom area of ​​the water outlet trough (202) is expanded into an annular liquid retention cavity (205), which is used to replenish water to the water outlet trough (202) at the corresponding position when the water inlet (2061) is facing down and water is poured out from the corresponding water storage cavity (204), water passage hole (203) and the corresponding water outlet trough (202), ensuring that the annular absorbent cotton (6) maintains sufficient water content. The inner end of the annular absorbent cotton (6) extends into the liquid retention cavity (205). The part of the annular absorbent cotton (6) located in the liquid retention cavity (205) is an enlarged limiting flange (601). The extended limiting flange (601) can completely fill the liquid retention cavity (205).

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