Novel vacuum tank device

Abstract

This invention provides a novel vacuum tank device, comprising an impregnation tube, a lower tank, an upper tank, and an alloy chute. The lower end of the upper tank is sealed to the upper end of the lower tank. The alloy chute is inclined vertically on the outer wall of the upper tank and communicates with the inner cavity of the upper tank. The inner wall of the lower tank is covered with refractory material, and the outer wall of the lower tank is covered with a first water-cooling pipe. The outer wall of the upper tank is covered with a second water-cooling pipe. This invention divides the vacuum tank into two sections, a lower tank and an upper tank, requiring only the inner wall of the lower tank to be covered with refractory material. The lower and upper tanks are designed as water-cooled coil structures, effectively reducing the use and consumption of refractory material and significantly reducing the weight of the entire vacuum tank device. Furthermore, ambient temperature cooling water is introduced through the inlet, and high-temperature water or steam flows out through the outlet, achieving waste heat recovery from the production process through the utilization of the energy of the hot water or steam.

Description

Technical Field

[0001] This utility model relates to the field of RH ladle refining equipment, and more specifically, to a novel vacuum tank device. Background Technology

[0002] RH vacuum refining technology is an indispensable part of the refining process in modern steel enterprises, but the RH vacuum refining process increases costs significantly. Among these costs, the vacuum tank, as the core equipment in RH vacuum refining, accounts for one of the main expenses due to its refractory material consumption. Existing vacuum tanks, such as... Figure 1 As shown, the tank is an integral structure, with the inner wall of the tank being lined with refractory material from top to bottom. The extensive use of refractory material not only leads to a surge in the cost of the RH vacuum refining process, but also significantly increases the overall weight of the vacuum tank. Steel plants need to provide it with expensive overhead cranes, transport trolleys, and other supporting facilities. At the same time, the waste heat generated during the RH production process cannot be recovered and utilized, thus failing to meet current environmental protection requirements for energy conservation and emission reduction. Utility Model Content

[0003] The main objective of this invention is to provide a novel vacuum tank device to at least solve the problems of high cost of RH vacuum refining process due to the large amount of refractory material used in the vacuum tank for RH vacuum refining in the prior art, as well as the significant increase in equipment weight of the RH vacuum tank.

[0004] To achieve the above objectives, this utility model provides a novel vacuum tank device, comprising: an impregnation tube; a lower tank body, the lower end of which is installed inside the impregnation tube; an upper tank body, the lower end of which is sealed to the upper end of the lower tank body; and an alloy chute, inclined in the vertical direction on the outer wall of the upper tank body and communicating with the inner cavity of the upper tank body; wherein, the inner wall of the lower tank body is covered with refractory material, the outer wall of the lower tank body is covered with a first water-cooling pipe, and the outer wall of the upper tank body is covered with a second water-cooling pipe.

[0005] Furthermore, the first water-cooling pipe is in two sets, and both sets of the first water-cooling pipe are arranged to bend back and forth along the outer wall of the lower tank to cover the entire outer wall of the lower tank.

[0006] Furthermore, the outer wall areas of the lower tanks covered by the two sets of first water-cooling pipes are equal.

[0007] Furthermore, each group of first water-cooling pipes has a first water inlet and a first water outlet. The first water inlet is located at the lower end of the outer wall of the lower tank, and the first water outlet is located at the upper end of the outer wall of the lower tank.

[0008] Furthermore, the second water-cooling pipe consists of two sets, both sets of which are arranged to bend back and forth along the outer wall of the upper tank to cover the entire outer wall of the upper tank.

[0009] Furthermore, the outer wall areas of the upper tanks covered by the two sets of second water-cooling pipes are equal.

[0010] Furthermore, each group of second water-cooling pipes has a second water inlet and a second water outlet. The second water inlet is located at the lower end of the outer wall of the upper tank, and the second water outlet is located at the upper end of the outer wall of the lower tank.

[0011] Furthermore, the upper end of the lower tank has a first connecting flange, and the lower end of the upper tank has a second connecting flange. The upper end of the lower tank and the lower end of the upper tank are fastened together by the first connecting flange and the second connecting flange. The first connecting flange and the second connecting flange each have a water-cooling cavity inside. The outside of the first connecting flange is provided with a third water inlet and a third water outlet communicating with the water-cooling cavity inside. The outside of the second connecting flange is provided with a fourth water inlet and a fourth water outlet communicating with the water-cooling cavity inside.

[0012] Furthermore, the upper end of the upper tank has a third connecting flange, the interior of which has a water-cooling cavity, and the exterior of the third connecting flange is provided with a fifth water inlet and a fifth water outlet that communicate with the internal water-cooling cavity.

[0013] This utility model discloses a novel vacuum tank device, comprising an impregnation tube, a lower tank, an upper tank, and an alloy chute. The lower end of the lower tank is installed inside the impregnation tube. The lower end of the upper tank is sealed to the upper end of the lower tank. The alloy chute is inclined vertically on the outer wall of the upper tank and communicates with the inner cavity of the upper tank. The inner wall of the lower tank is covered with refractory material, and the outer wall of the lower tank is covered with a first water-cooling pipe. The outer wall of the upper tank is covered with a second water-cooling pipe. This utility model divides the vacuum tank into two sections, a lower tank and an upper tank, requiring only the inner wall of the lower tank to be covered with refractory material. The lower and upper tanks are designed as water-cooled coil structures, effectively reducing the use and consumption of refractory material and significantly reducing the weight of the entire vacuum tank device. Furthermore, ambient temperature cooling water is introduced at the inlet, and high-temperature water or steam flows out at the outlet, achieving waste heat recovery from the production process through the utilization of the energy of the hot water or steam. This invention solves the problems of high refractory material usage in vacuum tanks used for RH vacuum refining, which leads to high costs in the RH vacuum refining process, and the significant increase in equipment weight of RH vacuum tanks in existing technologies. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0015] Figure 1 This is a schematic diagram of an existing vacuum chamber;

[0016] Figure 2 This is a cross-sectional structural schematic diagram of a novel vacuum tank device according to an embodiment of the present utility model;

[0017] Figure 3 This is a first-view external structural schematic diagram of a novel vacuum tank device, which is an optional embodiment of the present utility model.

[0018] Figure 4 This is a second-view external structural schematic diagram of a novel vacuum tank device, which is an optional embodiment of the present utility model.

[0019] The above figures include the following reference numerals:

[0020] 10. Impregnation pipe; 20. Lower tank; 21. Refractory material; 22. First water-cooling pipe; 221. First water inlet; 222. First water outlet; 23. First connecting flange; 231. Third water inlet; 232. Third water outlet; 30. Upper tank; 31. Second water-cooling pipe; 311. Second water inlet; 312. Second water outlet; 32. Second connecting flange; 321. Fourth water inlet; 322. Fourth water outlet; 33. Third connecting flange; 331. Fifth water inlet; 332. Fifth water outlet; 40. Alloy chute. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] The novel vacuum chamber device of this utility model, such as Figures 2 to 3As shown, it includes an impregnation tube 10, a lower tank 20, an upper tank 30, and an alloy chute 40; the lower end of the lower tank 20 is installed inside the impregnation tube 10; the lower end of the upper tank 30 is sealed to the upper end of the lower tank 20; the alloy chute 40 is inclined in the vertical direction on the outer side wall of the upper tank 30 and communicates with the inner cavity of the upper tank 30; the inner wall of the lower tank 20 is covered with refractory material 21, the outer wall of the lower tank 20 is covered with a first water-cooling pipe 22, and the outer wall of the upper tank 30 is covered with a second water-cooling pipe 31. This invention divides the vacuum tank into two sections: a lower tank 20 and an upper tank 30. Only the inner wall of the lower tank 20 needs to be covered with refractory material 21. Both the lower tank 20 and the upper tank 30 are designed as water-cooled coil structures, effectively reducing the use and consumption of refractory material 21 and significantly reducing the weight of the entire vacuum tank device. Furthermore, ambient temperature cooling water is introduced through the inlet, and high-temperature water or steam flows out through the outlet, achieving waste heat recovery during the production process through the utilization of the energy from the hot water or steam. This solves the problems of high RH vacuum refining process costs due to the large amount of refractory material 21 used in existing RH vacuum refining vacuum tanks and the significant increase in equipment weight.

[0023] In practice, both the lower tank 20 and the upper tank 30 are cylindrical steel shell structures, with the diameter of the lower tank 20 slightly larger than that of the upper tank 30. The inner wall of the lower tank 20 is constructed using refractory material 21 to form a molten pool for the steel reaction. Based on a vacuum level of 67 Pa and a steel molten height of approximately 500 mm, the height of the lower tank 20 should be such that the steel molten material does not exceed the height of the refractory material 21 during boiling and oxygen blowing. This maximizes the height of the upper part of the vacuum tank, thereby recovering more heat.

[0024] Optionally, one or more immersion tubes 10 may be provided. Correspondingly, the lower end of the lower tank 20 has one or more connection interfaces. The one or more immersion tubes 10 are connected to the one or more connection interfaces via flange structures, facilitating disassembly and maintenance. The immersion tubes 10 form channels for molten steel to enter and exit the vacuum tank device. The alloy chute 40 communicates with the inner cavity of the upper tank 30 and is used to add alloys to the molten steel during production.

[0025] There are two sets of first water-cooling pipes 22. Both sets of first water-cooling pipes 22 are arranged to bend back and forth along the outer wall of the lower tank 20 to cover the entire outer wall of the lower tank 20. Specifically, the two sets of first water-cooling pipes 22 cover the same area of ​​the outer wall of the lower tank 20. Each set of first water-cooling pipes 22 covers half of the side wall area of ​​the lower tank 20. The first water-cooling pipe 22 includes a main body section and a connecting section. There are multiple main body sections. Each main body section extends vertically from the upper end to the lower end of the lower tank 20. The multiple main body sections are parallel to each other and are equally spaced. The connecting sections are arranged circumferentially along the lower tank 20. Each connecting section is relatively short and connects two adjacent main body sections. The two adjacent connecting sections are arranged alternately, so that the first water-cooling pipes 22 are arranged to bend back and forth along the outer wall of the lower tank 20 to cover the outer wall of the lower tank 20 for cooling. This not only effectively utilizes the waste heat, but also reduces the loss of refractory material 21.

[0026] Furthermore, each set of first water-cooling pipes 22 has a first inlet 221 and a first outlet 222. The first inlet 221 is located at the lower end of the outer wall of the lower tank 20, and the first outlet 222 is located at the upper end of the outer wall of the lower tank 20. The two first inlets 221 of the two sets of first water-cooling pipes 22 are adjacent to each other, and the two first outlets 222 of the two sets of first water-cooling pipes 22 are adjacent to each other, thereby facilitating the introduction and discharge of cooling water.

[0027] Furthermore, there are two sets of second water-cooling pipes 31. Both sets of second water-cooling pipes 31 are arranged to bend back and forth along the outer wall of the upper tank 30 to cover the entire outer wall of the upper tank 30. Specifically, the outer wall area of ​​the upper tank 30 covered by the two sets of second water-cooling pipes 31 is equal. Each set of second water-cooling pipes 31 covers half of the side wall area of ​​the upper tank 30. The second water-cooling pipe 31 includes a main body section and a connecting section. There are multiple main body sections, each extending vertically from the upper end to the lower end of the upper tank 30. The multiple main body sections are parallel to each other and equally spaced. The connecting sections are arranged circumferentially along the upper tank 30. Each connecting section is relatively short and connects two adjacent main body sections. The two adjacent connecting sections are arranged alternately, so that the second water-cooling pipes 31 are arranged to bend back and forth along the outer wall of the upper tank 30 to cover the outer wall of the upper tank 30 for cooling.

[0028] Furthermore, each set of second water-cooling pipes 31 has a second inlet 311 and a second outlet 312. The second inlet 311 is located at the lower end of the outer wall of the upper tank 30, and the second outlet 312 is located at the upper end of the outer wall of the lower tank 20. The two second inlets 311 of the two sets of second water-cooling pipes 31 are adjacent to each other, and the two second outlets 312 of the two sets of second water-cooling pipes 31 are adjacent to each other, thereby facilitating the introduction and discharge of cooling water.

[0029] Furthermore, the upper end of the lower tank 20 has a first connecting flange 23, and the lower end of the upper tank 30 has a second connecting flange 32. The upper end of the lower tank 20 and the lower end of the upper tank 30 are fastened together by the first connecting flange 23 and the second connecting flange 32. Specifically, a sealing ring is provided between the first connecting flange 23 and the second connecting flange 32 for sealing. Fastening bolts are evenly arranged around the first connecting flange 23 and the second connecting flange 32, and the first connecting flange 23 and the second connecting flange 32 are fastened together by the fastening bolts. Both the first connecting flange 23 and the second connecting flange 32 have water-cooling chambers inside. The first connecting flange 23 has a third water inlet 231 and a third water outlet 232 communicating with its internal water-cooling chamber on its outside. The second connecting flange 32 has a fourth water inlet 321 and a fourth water outlet 322 communicating with its internal water-cooling chamber on its outside. The lower tank 20 and the upper tank 30 are detachably connected by the first connecting flange 23 and the second connecting flange 32, which facilitates the disassembly of the upper tank 30 for inspection and maintenance. The third inlet 231, the third outlet 232, the fourth inlet 321, and the fourth outlet 322 respectively supply and discharge cooling water to the first connecting flange 23 and the second connecting flange 32, which further enhances the cooling effect.

[0030] Furthermore, the upper end of the upper tank 30 has a third connecting flange 33, which contains a water-cooling cavity. The exterior of the third connecting flange 33 is provided with a fifth water inlet 331 and a fifth water outlet 332, communicating with the internal water-cooling cavity. The upper end of the upper tank 30 is connected to other devices via the third connecting flange 33. Cooling water is supplied and discharged to the third connecting flange 33 through the fifth water inlet 331 and the fifth water outlet 332 to enhance the cooling effect.

[0031] Optionally, the first outlet 222, the second outlet 312, the third outlet 232, the fourth outlet 322 and the fifth outlet 332 are connected to the waste heat recovery device, and each outlet flows out with high-temperature water or steam. By utilizing the energy of hot water or steam, waste heat recovery in the production process is achieved.

[0032] In actual use, under vacuum conditions, molten steel enters the lower tank 20 for refining. When adding alloys, alloy slag can enter the molten steel in the lower tank 20 through the alloy chute 40. When the refractory material 21 needs to be replaced, the upper tank 30 is separated from the lower tank 20 by loosening the fastening bolts between the first connecting flange 23 and the second connecting flange 32 of the lower tank 20 and the upper tank 30, thus facilitating the replacement of the refractory material 21.

[0033] The device of this utility model has the following advantages:

[0034] 1) The novel vacuum tank device of this utility model effectively reduces the use of refractory material 21, thereby significantly reducing the weight of the vacuum tank device and reducing the investment and maintenance costs of the supporting facilities for steel plants.

[0035] 2) The novel vacuum tank device of this utility model, through the externally set water-cooling structures, helps to significantly reduce the consumption of refractory materials in the production process of the vacuum tank device.

[0036] 3) The novel vacuum tank device of this utility model creates conditions for the recovery of waste heat in the RH vacuum refining process by heating or vaporizing cooling water.

[0037] 4) This utility model helps to further reduce the production cost of the RH refining process and realize the recovery and utilization of waste heat, thereby achieving the goal of energy conservation and emission reduction.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel vacuum tank device, characterized by, include: Impregnation tube (10); The lower part of the lower part of the tank (20) is installed inside the impregnation tube (10); The upper tank (30) is sealed to the upper end of the lower tank (20). The alloy chute (40) is inclined in the vertical direction and is disposed on the outer side wall of the upper trough (30) and communicates with the inner cavity of the upper trough (30); The lower tank (20) has its inner wall covered with refractory material (21), its outer wall covered with a first water-cooling pipe (22), and its outer wall covered with a second water-cooling pipe (31).

2. The novel vacuum tank apparatus according to claim 1, characterized in that, The first water-cooling pipe (22) consists of two sets, and both sets of the first water-cooling pipe (22) are arranged to bend back and forth along the outer wall of the lower tank (20) to cover the entire outer wall of the lower tank (20).

3. The novel vacuum tank apparatus according to claim 2, characterized in that, The outer wall areas of the lower tank (20) covered by the two sets of first water-cooling pipes (22) are equal.

4. The novel vacuum chamber device according to claim 3, characterized in that, Each of the first water-cooling pipes (22) has a first inlet (221) and a first outlet (222). The first inlet (221) is located at the lower end of the outer wall of the lower tank (20), and the first outlet (222) is located at the upper end of the outer wall of the lower tank (20).

5. The novel vacuum chamber device according to claim 1, characterized in that, The second water-cooling pipe (31) consists of two sets, both sets of the second water-cooling pipe (31) are arranged to bend back and forth along the outer wall of the upper tank (30) to cover the entire outer wall of the upper tank (30).

6. The novel vacuum chamber device according to claim 5, characterized in that, The outer wall areas of the upper tank (30) covered by the two sets of second water-cooling pipes (31) are equal.

7. The novel vacuum chamber device according to claim 6, characterized in that, Each of the second water-cooling pipes (31) has a second inlet (311) and a second outlet (312). The second inlet (311) is located at the lower end of the outer wall of the upper tank (30), and the second outlet (312) is located at the upper end of the outer wall of the lower tank (20).

8. The novel vacuum chamber device according to claim 1, characterized in that, The upper end of the lower tank (20) has a first connecting flange (23), and the lower end of the upper tank (30) has a second connecting flange (32). The upper end of the lower tank (20) and the lower end of the upper tank (30) are fastened to each other through the first connecting flange (23) and the second connecting flange (32). The first connecting flange (23) and the second connecting flange (32) both have water-cooled chambers inside. The first connecting flange (23) is provided with a third water inlet (231) and a third water outlet (232) communicating with its internal water-cooled chamber. The second connecting flange (32) is provided with a fourth water inlet (321) and a fourth water outlet (322) communicating with its internal water-cooled chamber.

9. The novel vacuum chamber device according to claim 1, characterized in that, The upper end of the upper tank (30) has a third connecting flange (33), the third connecting flange (33) has a water cooling cavity inside, and the third connecting flange (33) has a fifth water inlet (331) and a fifth water outlet (332) communicating with the water cooling cavity inside.

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