A zinc sulfate solution preheating device

Abstract

The utility model relates to a chemical industry technical field, concretely relates to a zinc sulfate solution preheating device, including jar body, the one side of jar body top is connected with liquid inlet pipe, and the central connection of jar body bottom has liquid outlet pipe, the inside heat exchange pipe group is provided with in jar body, the heat exchange pipe group includes at least two heat exchange pipes, the heat exchange pipe is interval distribution from top to bottom, every heat exchange pipe includes straight pipe portion and U portion, and the U portion connects straight pipe portion and forms the serpentine heat exchange pipe, is provided with the fixed plate on jar body, and the both ends of heat exchange pipe pass through the hole of fixed plate, and the hole position of fixed plate is provided with sealing assembly, the utility model discloses at least two heat exchange pipes interval distribution from top to bottom and carry out preheating in the layering and regionalization, and heat exchange is more uniform, and heat exchange effect is better, and through setting sealing assembly, realizes the free expansion of heat exchange pipe, and also can realize sealing.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, specifically to a zinc sulfate solution preheating device. Background Technology

[0002] In the hydrometallurgical zinc smelting process, heating the zinc sulfate solution is a crucial step. Typically, the solution is heated to 70-85°C, a temperature range that helps improve the efficiency of subsequent purification processes. At this temperature, impurity ions in the solution react more readily with the added purifying agents to form precipitates, which are then removed. Furthermore, heating helps maintain the solution's acidity within a suitable range (pH 4.5-6.0), which is essential for ensuring effective purification. This treatment effectively reduces the content of impurities such as cadmium and cobalt in the solution, improving the quality of the zinc sulfate solution and meeting the requirements for zinc electrowinning.

[0003] As can be seen from the above analysis, preheating of the zinc sulfate solution is a key step in optimizing leaching efficiency, promoting impurity removal, and ensuring the stability of subsequent processes. However, traditional preheating devices mostly use steam heaters to directly heat the zinc sulfate solution in the tank as a whole, which results in low solution heating efficiency and is prone to uneven heating. Summary of the Invention

[0004] To address the problem that most traditional preheating devices use steam heaters to directly heat the zinc sulfate solution in the tank, resulting in low solution heating efficiency and uneven heating, this invention proposes a zinc sulfate solution preheating device. This device uses at least two heat exchange tubes spaced vertically for layered and zoned preheating, resulting in more uniform heat exchange and better heat exchange effect. This effectively eliminates the problem of uneven temperature in the zinc sulfate solution and reduces energy consumption.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A zinc sulfate solution preheating device includes a tank with an inlet pipe connected to one side of the top and an outlet pipe connected to the center of the bottom. Inside the tank is a heat exchange tube assembly, comprising at least two heat exchange tubes spaced vertically. Each heat exchange tube includes a straight section and a U-shaped section, with the U-shaped section connecting to the straight section to form a serpentine heat exchange tube. A fixing plate is mounted on the tank, and the two ends of the heat exchange tubes pass through through holes in the fixing plate. A sealing assembly is installed at the through holes of the fixing plate. This method of preheating by using at least two vertically spaced heat exchange tubes in a layered and zoned manner results in more uniform heat exchange. Furthermore, the sealing assembly allows for both free expansion of the heat exchange tubes and a sealed environment.

[0007] Furthermore, a level gauge and an armored thermal resistor are installed on the inner wall of the tank. The level gauge is used to obtain the height of the zinc sulfate solution inside the tank; the armored thermal resistor is used to obtain the temperature of the zinc sulfate solution inside the tank.

[0008] Furthermore, the top of the tank is also provided with a steam inlet pipe and a steam outlet pipe, and the two ends of the heat exchange pipe pass through the tank and the fixing plate in sequence and are connected to the steam inlet pipe and the steam outlet pipe respectively.

[0009] Furthermore, each of the steam outlet pipes is equipped with a steam trap. This allows for timely drainage of condensate and control of steam leakage.

[0010] Furthermore, the sealing assembly includes a sleeve and a gland. The sleeve is fixedly connected to a fixed plate, and packing is disposed inside the sleeve. One end of the packing is limited by an annular platform, and the gland is located at the other end of the packing. The heat exchange tube passes through the sleeve, the packing, and the gland in sequence. Several studs are provided at the top of the sleeve, and nuts are fitted on the studs. By turning the nuts, the gland is moved, and the gland cooperates with the annular platform to compress the packing. This allows the heat exchange tube to slide smoothly within the packing due to thermal expansion, realizing the free expansion of the heat exchange tube when heated, and also achieving a seal.

[0011] Furthermore, the heat exchange tube is evenly distributed with spiral fins.

[0012] Furthermore, valves are respectively installed on the inlet pipe and the outlet pipe.

[0013] Furthermore, a ladder is provided on one side of the tank, and a maintenance platform is provided on the outer wall of the tank. The ladder extends from the bottom of the tank to the maintenance platform, and the maintenance platform is fixedly connected to the ladder. By providing the ladder and maintenance platform, maintenance personnel can climb from the bottom of the tank to the maintenance platform, and perform maintenance and repairs on the top of the tank from the maintenance platform.

[0014] The beneficial effects of this utility model through the above technical solution are as follows:

[0015] This invention employs at least two heat exchange tubes spaced vertically for layered and zoned preheating, resulting in more uniform heat exchange and better heat exchange effect. It can effectively eliminate the problem of uneven temperature of zinc sulfate solution, reduce energy consumption, and by turning the nut to move the pressure cap, the pressure cap cooperates with the annular platform to compress the packing. This allows the heat exchange tubes to slide smoothly within the packing due to thermal expansion, realizing the free expansion of the heat exchange tubes when heated, and also achieving a seal to prevent zinc sulfate solution from overflowing. Attached Figure Description

[0016] Figure 1 This utility model relates to a three-dimensional zinc sulfate solution preheating device. Figure 1 ;

[0017] Figure 2 This utility model relates to a three-dimensional zinc sulfate solution preheating device. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the interior of the tank in a zinc sulfate solution preheating device according to this utility model;

[0019] Figure 4 This is a schematic diagram of the sealing component in a zinc sulfate solution preheating device according to the present invention;

[0020] Figure 5 This is a schematic diagram showing the distribution of fins on the heat exchange tube in a zinc sulfate solution preheating device according to this utility model.

[0021] The numbers in the attached diagram are:

[0022] 1. Tank body; 2. Inlet pipe; 3. Outlet pipe; 4. Heat exchanger tube; 401. Straight pipe section; 402. U-shaped section; 5. Fixing plate; 6. Liquid level gauge; 7. Armored thermal resistor; 8. Steam inlet pipe; 9. Steam outlet pipe; 10. Steam trap; 11. Sleeve; 12. Gland; 13. Packing; 14. Annular platform; 15. Stud; 16. Nut; 17. Fin; 18. Valve; 19. Ladder; 20. Maintenance platform. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0024] like Figures 1-5 As shown, this embodiment provides a zinc sulfate solution preheating device, including a tank 1. An inlet pipe 2 is connected to one side of the top of the tank 1, and an outlet pipe 3 is connected to the center of the bottom of the tank 1. A heat exchange tube assembly is provided inside the tank 1. The heat exchange tube assembly includes at least two heat exchange tubes 4, which are distributed vertically at intervals. Each heat exchange tube 4 includes a straight tube section 401 and a U-shaped section 402. The U-shaped section 402 connects to the straight tube section 401 to form a serpentine heat exchange tube 4. A fixing plate 5 is provided on the tank 1. The two ends of the heat exchange tubes 4 pass through through holes on the fixing plate 5, and a sealing component is provided at the through hole position of the fixing plate 5.

[0025] This invention employs at least two heat exchange tubes 4 spaced apart vertically for layered and zoned preheating, resulting in more uniform heat exchange and better heat exchange effect. It can effectively eliminate the problem of uneven temperature of zinc sulfate solution, reduce energy consumption, and by setting a sealing component, it can realize the free expansion of heat exchange tube 4 while also achieving a seal to prevent zinc sulfate solution from overflowing.

[0026] In this embodiment, a level gauge 6 and an armored thermal resistor 7 are provided on the inner wall of the tank 1. The level gauge 6 is used to obtain the height value of the zinc sulfate solution in the tank 1; the armored thermal resistor 7 is a temperature sensor, which is installed inside the tank 1 to obtain the temperature value of the zinc sulfate solution in the tank 1.

[0027] In this embodiment, the top of the tank body 1 is also provided with a steam inlet pipe 8 and a steam outlet pipe 9. The two ends of the heat exchange pipe 4 pass through the tank body 1 and the fixing plate 5 in sequence and are connected to the steam inlet pipe 8 and the steam outlet pipe 9 respectively.

[0028] In this embodiment, each steam outlet pipe 9 is equipped with a steam trap 10. Steam and condensate cooled from the steam flow out of the steam outlet pipe 9. During the outflow process, the steam and condensate are separated by the steam trap 10. The condensate is discharged to the outside of the heat exchange tube 4 by the steam trap 10, which can achieve the effects of timely discharge of condensate and control of steam leakage. Furthermore, the steam traps 10 on multiple steam outlet pipes 9 are connected sequentially by pipelines, making the steam trap system integrated and easy to operate.

[0029] Specifically, the sealing assembly includes a sleeve 11 and a gland 12. The sleeve 11 is fixedly connected to the fixing plate 5. A packing 13 is provided inside the sleeve 11. One end of the packing 13 is limited by an annular platform 14, and the gland 12 is located at the other end of the packing 13. The heat exchange tube 4 passes through the sleeve 11, the packing 13 and the gland 12 in sequence. A plurality of studs 15 are provided on the top of the sleeve 11, and nuts 16 are fitted on the studs 15.

[0030] To allow the heat exchange tube 4 to expand freely when heated, a certain gap is provided between the outer wall of the heat exchange tube 4 and the inner wall of the through hole on the fixing plate 5. This makes it easy for the zinc sulfate solution inside the tank 1 to overflow from the gap, causing leakage. To address this, the present invention also includes a sealing component. Specifically, the packing 13 has at least two rings. By tightening the nut 16, the pressure cap 12 is moved. The pressure cap 12 cooperates with the annular platform 14 to press the packing 13 tightly, allowing the heat exchange tube 4 to slide smoothly within the packing 13 due to thermal expansion. This achieves both free expansion of the heat exchange tube 4 and a seal.

[0031] Please refer to this again. Figure 5 The heat exchange tube 4 is evenly distributed with spiral fins 17. Using a serpentine heat exchange tube 4 with spiral fins 17 can increase the heat exchange area.

[0032] In addition, valves 18 are respectively installed on the inlet pipe 2 and the outlet pipe 3. This allows for the convenient replenishment of zinc sulfate solution into the tank 1 and the external delivery of zinc sulfate solution by controlling the opening of the valves 18.

[0033] It is worth mentioning that a ladder 19 is provided on one side of the tank body 1, and a maintenance platform 20 is provided on the outer wall of the tank body 1. The ladder 19 extends from the bottom of the tank body 1 to the maintenance platform 20, and the maintenance platform 20 is fixedly connected to the ladder 19.

[0034] The applicant wishes to explain that the storage tanks in this embodiment are often quite tall, and valves 18, interfaces, and various sensors are generally installed on the top of the tank. Regular maintenance and repairs are required during the use of the storage tanks, and for maintenance personnel, climbing to the top of the tank for maintenance work is very cumbersome. Therefore, this utility model provides a ladder 19 and a maintenance platform 20. The ladder 19 allows personnel to climb from the bottom of the tank to the maintenance platform 20, where maintenance personnel can perform maintenance and repairs on the top of the tank. The entire maintenance process does not require scaffolding or other climbing tools, making it convenient for maintenance personnel to maintain the storage tank. The maintenance platform 20 is also surrounded by a fence (not shown in the figure), which is used to protect climbing personnel.

[0035] The working principle of this utility model is as follows:

[0036] In use, this utility model employs at least two heat exchange tubes 4 spaced apart vertically for layered and zoned preheating, resulting in more uniform heat exchange and better heat exchange effect. This effectively eliminates the problem of uneven temperature in zinc sulfate solution, reduces energy consumption, and by turning the nut 16, the pressure cap 12 moves. The pressure cap 12 cooperates with the annular platform 14 to press the packing 13 tightly, allowing the heat exchange tubes 4 to slide smoothly within the packing 13 due to thermal expansion. This achieves free expansion of the heat exchange tubes 4 when heated and also ensures a seal.

[0037] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A zinc sulfate solution preheating device, comprising a tank (1), characterized in that, A liquid inlet pipe (2) is connected to one side of the top of the tank (1), and a liquid outlet pipe (3) is connected to the center of the bottom of the tank (1). A heat exchange tube group is provided inside the tank (1), and the heat exchange tube group includes at least two heat exchange tubes (4). The heat exchange tubes (4) are distributed vertically and horizontally. Each heat exchange tube (4) includes a straight tube section (401) and a U-shaped section (402). The U-shaped section (402) is connected to the straight tube section (401) to form a serpentine heat exchange tube (4). A fixing plate (5) is provided on the tank (1). The two ends of the heat exchange tubes (4) pass through the through holes on the fixing plate (5). A sealing component is provided at the through hole position of the fixing plate (5).

2. The zinc sulfate solution preheating device according to claim 1, characterized in that, The inner wall of the tank (1) is provided with a level gauge (6) and a sheathed thermal resistor (7).

3. The zinc sulfate solution preheating device according to claim 1, characterized in that, The top of the tank (1) is also provided with a steam inlet pipe (8) and a steam outlet pipe (9). The two ends of the heat exchange pipe (4) pass through the tank (1) and the fixing plate (5) in sequence and are connected to the steam inlet pipe (8) and the steam outlet pipe (9) respectively.

4. The zinc sulfate solution preheating device according to claim 3, characterized in that, Each of the steam outlet pipes (9) is equipped with a steam trap (10).

5. The zinc sulfate solution preheating device according to claim 1, characterized in that, The sealing assembly includes a sleeve (11) and a gland (12). The sleeve (11) is fixedly connected to the fixing plate (5). The sleeve (11) is filled with packing (13). One end of the packing (13) is limited by an annular platform (14). The gland (12) is located at the other end of the packing (13). The heat exchange tube (4) passes through the sleeve (11), the packing (13) and the gland (12) in sequence. The top of the sleeve (11) is provided with several studs (15). Nuts (16) are fitted on the studs (15).

6. The zinc sulfate solution preheating device according to claim 1, characterized in that, Spiral fins (17) are evenly distributed on the heat exchange tube (4).

7. The zinc sulfate solution preheating device according to claim 1, characterized in that, Valves (18) are respectively installed on the inlet pipe (2) and the outlet pipe (3).

8. The zinc sulfate solution preheating device according to claim 1, characterized in that, A ladder (19) is provided on one side of the tank (1), and a maintenance platform (20) is provided on the outer wall of the tank (1). The ladder (19) extends from the bottom of the tank (1) to the maintenance platform (20), and the maintenance platform (20) is fixedly connected to the ladder (19).

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