Heat exchange device of multi-effect evaporator

Abstract

The heat exchange device of the multi-effect evaporator comprises a barrel, baffles are installed on the outer walls of the two sides of the barrel through screws, the other end of a water inlet pipe is communicated with the interior of the barrel, a heat exchange pipe is installed in the barrel, the outer walls of the baffles are fixedly connected with refrigerant pipes, and the refrigerant pipes are communicated with the interior of the heat exchange pipe. The reciprocating lead screw is connected with multiple sets of scraping rings through a connecting mechanism, and the multiple sets of scraping rings are slidably connected to the outer wall of the heat exchange pipe. By means of an automatic scraping ring cleaning mechanism which is innovatively designed, the problem of incrustation on the surface of the heat exchange tube in the long-term heating process is solved, the multiple sets of scraping rings are connected to the outer wall of the heat exchange tube in a sliding mode and driven by the reciprocating lead screw to reciprocate, automatic scraping of the incrustation on the surface of the heat exchange tube is achieved, incrustation accumulation is effectively prevented, and the service life of the heat exchange tube is prolonged. The efficient heat transfer performance is kept, the problem that the heat exchange efficiency is reduced due to incrustation is greatly reduced, and the overall operation efficiency of the evaporator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporator heat exchange, in particular to a heat exchange device of a multiple-effect evaporator. Background Art

[0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid. It is also called a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial productions. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used.

[0003] At present, scale will condense on the surface of the heat exchange tube in the evaporator during the long-term heating of water, which not only leads to the deterioration of the heating effect of the heat exchanger, but also causes corrosive substances to adhere to the surface of the heat exchange tube, causing corrosion of the heat exchange tube, seriously affecting the service life of the heat exchanger. Therefore, it is necessary to redesign a heat exchange device of a multiple-effect evaporator to address the above problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a heat exchange device for a multiple-effect evaporator.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A heat exchange device for a multiple-effect evaporator comprises a cylinder, baffles are installed on the outer walls of both sides of the cylinder by screws, the other end of a water inlet pipe is connected to the interior of the cylinder, a heat exchange tube is installed in the cylinder, a cold medium tube is fixedly connected to the outer wall of the baffle, the cold medium tube is connected to the interior of the heat exchange tube, a reciprocating screw is rotatably connected to the inner wall of the cylinder, the reciprocating screw is connected to multiple groups of scraper rings through a connecting mechanism, and the multiple groups of scraper rings are slidably connected to the outer wall of the heat exchange tube.

[0007] Preferably, the connecting mechanism includes a screw sleeve threadedly connected to the threaded section of the reciprocating screw, and a plurality of connecting rods are fixedly connected to the outer wall of the screw sleeve. The number of the connecting rods is consistent with the number of scraper rings, and they are fixedly connected to the corresponding scraper rings respectively.

[0008] Preferably, the inner wall of the cylinder is fixedly connected to a limit rod, and the lead screw sleeve is slidably connected to the outer wall of the limit rod.

[0009] Preferably, two groups of limit blocks are fixedly connected to the reciprocating screw threaded section, the positions of the two groups of limit blocks are symmetrical to each other, and the distance between the two groups of limit blocks is smaller than the length of the heat exchange tube.

[0010] Preferably, two groups of water inlet pipes are fixedly connected to the upper end of the cylinder body, and the ends of the two groups of water inlet pipes are commonly fixedly connected to a conversion outer cylinder and communicated with the interior of the conversion outer cylinder.

[0011] Preferably, a servo motor is fixedly connected to the outer wall of the baffle, and the end of the output shaft of the servo motor is coaxially fixedly connected to the reciprocating screw.

[0012] The utility model has the following beneficial effects:

[0013] 1. The utility model solves the scaling problem on the surface of the heat exchange tube during long-term heating through an innovatively designed automatic scraper ring cleaning mechanism. Multiple groups of scraper rings are slidably connected to the outer wall of the heat exchange tube and driven by a reciprocating screw to perform reciprocating motion, thereby automatically scraping off the scale on the surface of the heat exchange tube. This not only effectively prevents scale accumulation and maintains efficient heat transfer performance, but also greatly reduces the problem of decreased heat exchange efficiency caused by scaling, thereby improving the overall operating efficiency of the evaporator.

[0014] 2. The utility model avoids the adhesion of corrosive substances on the surface of the heat exchange tube by adding a regular cleaning function, thereby greatly extending the service life of the heat exchange tube. The regular automatic scraping function can not only prevent the accumulation of scale, but also remove the attached corrosive substances in time to reduce the corrosion damage to the heat exchange tube. Compared with the traditional evaporator, this heat exchange device has significant advantages in maintaining the structural integrity and material durability of the heat exchange tube, which helps to extend the service life of the equipment and reduce the operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a heat exchange device of a multiple-effect evaporator proposed by the utility model;

[0016] Figure 2 for Figure 1 Section view.

[0017] Figure 3 for Figure 2 A schematic diagram of the enlarged structure in the middle.

[0018] Figure 4 for Figure 2 Schematic diagram of the structure of the heat exchange tube and scraper ring.

[0019] In the figure: 1. Cylinder; 2. Water inlet pipe; 3. Baffle; 4. Cold medium pipe; 5. Servo motor; 6. Conversion outer cylinder; 7. Reciprocating screw; 8. Limit rod; 9. Limit block; 10. Screw sleeve; 11. Connecting rod; 12. Scraper ring; 13. Heat exchange tube. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1-4 A heat exchange device for a multiple-effect evaporator comprises a cylinder 1, baffles 3 are installed on the outer walls of both sides of the cylinder 1 by screws, the other end of the water inlet pipe 2 is connected to the inside of the cylinder 1, a heat exchange tube 13 is installed in the cylinder 1, a cold medium tube 4 is fixedly connected to the outer wall of the baffle 3, the cold medium tube 4 is connected to the inside of the heat exchange tube 13, a reciprocating screw 7 is rotatably connected to the inner wall of the cylinder 1, the reciprocating screw 7 is connected to multiple groups of scraper rings 12 through a connecting mechanism, the multiple groups of scraper rings 12 are all slidably connected to the outer wall of the heat exchange tube 13, the connecting mechanism comprises a screw sleeve 10 threadedly connected to the threaded section of the reciprocating screw 7, the outer wall of the screw sleeve 10 is fixedly connected to multiple groups of connecting rods 11, the number of the multiple groups of connecting rods 11 is the same as the number of scraper rings 12, and they are respectively fixedly connected to the scraper rings 12;

[0022] The core of this evaporator device lies in the design of the cylinder 1 and the reasonable layout of the components inside the cylinder 1. The water inlet pipe 2 introduces the liquid material into the cylinder 1 for heating treatment. The baffles 3 on both sides of the cylinder 1 are installed by screws to increase the stability of the structure. At the same time, the fixedly connected cold medium pipe 4 provides the transmission of the cooling medium to ensure the temperature control inside the heat exchange tube 13. The outer wall of the core component heat exchange tube 13 is equipped with multiple groups of scraper rings 12. These scraper rings 12 are slidably connected to the outer wall of the heat exchange tube 13. Through the rotation of the reciprocating screw 7, the scale on the surface of the heat exchange tube 13 is automatically scraped off, which improves the heat exchange efficiency and service life of the equipment. The screw sleeve 10 threadedly connected to the threaded section of the reciprocating screw 7 is linked with the scraper ring 12 through multiple connecting rods 11, so that each scraper ring 12 can effectively clean the attachments on the surface of the heat exchange tube 13 during the reciprocating motion.

[0023] The inner wall of the cylinder 1 is fixedly connected to the limit rod 8, and the screw sleeve 10 is slidably connected to the outer wall of the limit rod 8; in order to ensure that the screw sleeve 10 remains stable and smooth during the reciprocating motion, the inner wall of the cylinder 1 guides the movement of the screw sleeve 10 by fixing the limit rod 8. The limit rod 8 is fixed to the inner wall of the cylinder 1, which plays a supporting and guiding role, so that the screw sleeve 10 slides along the surface of the limit rod 8, thereby avoiding the failure of the scraper ring 12 or the position deviation of the scraper ring 12 due to vibration and unstable factors, and maintaining the efficient operation of the entire cleaning system.

[0024] Two groups of limit blocks 9 are fixedly connected to the threaded section of the reciprocating screw 7. The positions of the two groups of limit blocks 9 are symmetrical to each other. The distance between the two groups of limit blocks 9 is smaller than the length of the heat exchange tube 13. Two groups of water inlet pipes 2 are fixedly connected to the upper end of the cylinder 1. The ends of the two groups of water inlet pipes 2 are commonly fixedly connected to the conversion outer cylinder 6 and are connected to the interior of the conversion outer cylinder 6. The outer wall of the baffle 3 is fixedly connected to the servo motor 5, and the end of the output shaft of the servo motor 5 is coaxially fixedly connected to the reciprocating screw 7.

[0025] In the present invention, the specific function of the device is as follows: the material is introduced into the cylinder 1 through the water inlet pipe 2 for heating treatment. Two groups of water inlet pipes 2 are fixed at the upper end of the cylinder 1, and the ends are respectively fixedly connected to the conversion outer cylinder 6 to ensure that the material enters the cylinder 1 evenly, thereby improving the heating uniformity of the material. The heat exchange pipe 13 is installed in the cylinder 1. When the cooling medium is passed into the cold medium pipe 4, the heat transfer to the entering material is realized through the heat exchange pipe 13, completing the heating process.

[0026] During the long heating process, scale is easily condensed on the surface of the heat exchange tube 13. To ensure the heat exchange efficiency, the inner wall of the cylinder 1 is rotatably connected with a reciprocating screw 7, which drives multiple groups of scraper rings 12 to reciprocate on the outer wall of the heat exchange tube 13 through the screw sleeve 10 on its threaded section. The rotation of the screw sleeve 10 is controlled by the servo motor 5 fixed on the outer wall of the baffle 3, and the output shaft is coaxially connected with the reciprocating screw 7 to achieve precise rotation control.

[0027] Two sets of limit blocks 9 are fixedly connected to the threaded section of the reciprocating screw 7. The limit blocks 9 are symmetrical on the left and right, and the distance between them is less than the length of the heat exchange tube 13. The setting of the limit blocks 9 limits the stroke of the screw, ensuring that the scraping range of the scraper ring 12 covers the entire outer wall of the heat exchange tube 13, but will not move excessively to cause potential equipment damage.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heat exchange device for a multiple-effect evaporator, comprising a cylinder (1), characterized in that: Baffles (3) are installed on the outer walls of both sides of the cylinder (1) by screws, the other end of the water inlet pipe (2) is connected to the interior of the cylinder (1), a heat exchange tube (13) is installed in the cylinder (1), a cold medium tube (4) is fixedly connected to the outer wall of the baffle (3), the cold medium tube (4) is connected to the interior of the heat exchange tube (13), and a reciprocating screw (7) is rotatably connected to the inner wall of the cylinder (1), and the reciprocating screw (7) is connected to multiple groups of scraper rings (12) through a connecting mechanism, and the multiple groups of scraper rings (12) are all slidably connected to the outer wall of the heat exchange tube (13).

2. The heat exchange device of a multiple-effect evaporator according to claim 1, characterized in that: The connection mechanism comprises a screw sleeve (10) threadedly connected to a threaded section of a reciprocating screw (7), and a plurality of connecting rods (11) are fixedly connected to the outer wall of the screw sleeve (10), the number of the plurality of connecting rods (11) being the same as the number of scraper rings (12), and the connecting rods (11) are respectively fixedly connected to the scraper rings (12).

3. The heat exchange device of a multiple-effect evaporator according to claim 2, characterized in that: The inner wall of the cylinder (1) is fixedly connected to a limit rod (8), and the lead screw sleeve (10) is slidably connected to the outer wall of the limit rod (8).

4. The heat exchange device of a multiple-effect evaporator according to claim 3, characterized in that: Two groups of limit blocks (9) are fixedly connected to the threaded section of the reciprocating screw (7); the positions of the two groups of limit blocks (9) are symmetrical to each other; and the distance between the two groups of limit blocks (9) is smaller than the length of the heat exchange tube (13).

5. The heat exchange device of a multiple-effect evaporator according to claim 4, characterized in that: Two groups of water inlet pipes (2) are fixedly connected to the upper end of the cylinder (1), and the ends of the two groups of water inlet pipes (2) are commonly fixedly connected to a conversion outer cylinder (6) and are in communication with the interior of the conversion outer cylinder (6).

6. The heat exchange device of a multiple-effect evaporator according to claim 5, characterized in that: A servo motor (5) is fixedly connected to the outer wall of the baffle (3), and the end of the output shaft of the servo motor (5) is coaxially fixedly connected to the reciprocating screw (7).

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