Efficient shell-and-tube heat exchanger easy to clean

Abstract

The utility model discloses an efficient shell-and-tube heat exchanger easy to clean, and relates to the technical field of heat exchangers. The filter comprises a shell, a first connecting pipe is fixedly connected to the top of one end of the shell, a second connecting pipe is fixedly connected to the bottom of the other end of the shell, pipe plates are arranged on ports of the two ends of the shell, a third connecting pipe is fixedly connected to the top of one end socket, and a filter assembly is arranged in the third connecting pipe. According to the utility model, the filter assembly is arranged, so that the filter box can be conveniently taken out for cleaning, the filter box is simple and quick to mount and dismount due to the quick dismounting design, complicated tools or operation processes are not needed, and the continuous and effective filtering effect is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, and in particular relates to a high-efficiency shell and tube heat exchanger that is easy to clean. Background Art

[0002] A shell-and-tube heat exchanger consists of a shell and headers sealed at each end. The shell houses a tube bundle, which is secured by tubesheets at both ends. The tube bundle passes through the headers at both ends, and the tube bundle is restrained by the tubesheets. During heat exchange, one fluid enters the tube bundle through the header at one end, flows through the tube bundle, and then exits through the header at the other end. This is called the tube side. Another fluid enters the shell between the two tubesheets and flows outside the tube bundle. This is called the shell side.

[0003] Traditional shell-and-tube heat exchangers accumulate residual dirt after prolonged use, significantly reducing heat transfer efficiency. For example, pulp wastewater contains high levels of suspended matter, such as fibers, which deposit on the inner walls of the tube bundle, reducing heat transfer efficiency. Due to their compact structure, shell-and-tube heat exchangers require manual disassembly and cleaning, making cleaning difficult. Furthermore, the flow pattern of the fluid within the shell-and-tube heat exchanger significantly impacts its heat transfer efficiency. Improving heat transfer efficiency and fully recovering heat from pulp wastewater will help companies reduce overall production costs. Utility Model Content

[0004] The purpose of the utility model is to provide an easy-to-clean, high-efficiency shell and tube heat exchanger. By providing a filter assembly and a quick-release structure design, the installation and removal of the filter cartridge are simple and quick, and the filter device can be conveniently removed for cleaning without the need for complicated tools or operating procedures, thereby ensuring that the filtering effect of the shell and tube heat exchanger is continuously effective.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The utility model provides an easy-to-clean high-efficiency shell-and-tube heat exchanger, comprising a shell, wherein both ends of the shell are respectively sealed with a head, the top of one end of the shell is connected to a first pipe, and the bottom of the other end of the shell is connected to a second pipe; tube sheets are provided on both end ports of the shell, and the top of one of the heads is connected to a third pipe;

[0007] Two vertical grooves are provided on the inner wall of the third connecting pipe, and a filter assembly is provided inside the third connecting pipe. The filter assembly includes a filter box slidably connected in the third connecting pipe, and the outer edge of the top opening of the filter box is fixedly connected to a ring, and the ring is clamped in the pipe mouth of the third connecting pipe. A rotating plate is rotatably provided at the bottom of the filter box, and two limit blocks are fixedly connected to the left and right side walls of the outside of the filter box, and a spring and a support plate are sequentially provided below the rotating plate. Support rods are vertically provided on the left and right sides of the filter box respectively, the top of the support rod is fixedly connected to the inner wall of the head, the bottom of the support rod is fixedly connected to the support plate, and the lower end of the spring is fixed to the support plate.

[0008] Optionally, a plurality of heat transfer tubes are provided in the shell, and the end of each heat transfer tube passes through the corresponding tube sheet and communicates with the inner cavity of the head. A baffle is fixedly provided in the shell, and the heat transfer tube passes through the baffle.

[0009] Optionally, a fourth connecting pipe is provided at the bottom of another end cap, and a reciprocating assembly is provided inside the end cap; the reciprocating assembly includes a motor fixedly connected to the outside of the end cap, and the output end of the motor is fixedly connected to a connecting cylinder via a transmission shaft, and the connecting cylinder is provided inside the end cap;

[0010] A sliding rod is slidably provided at the end of the connecting tube, a limiting groove is formed around the inner wall of the connecting tube, and the limiting groove is wavy in shape. A limiting protrusion is fixedly provided at the end of the sliding rod, and the limiting protrusion is slidably connected in the limiting groove;

[0011] The sliding rod seal slides through the corresponding tube plate and extends to the inside of the shell. The sliding rod is fixedly connected to a disturbance plate. The heat transfer tube slides through the disturbance plate, and the sliding rod slides through the deflector.

[0012] Optionally, a connecting ring is rotatably provided on the outer side of the connecting cylinder, a connecting rod is fixedly provided on the outer side of the connecting ring, and the outer end of the connecting rod is fixedly connected to the inner wall of the head.

[0013] The utility model has the following beneficial effects:

[0014] 1. This utility model incorporates a filter assembly. Pulp wastewater is introduced through a third pipe, filtered through a filter cartridge, and then enters the heat transfer tube. This effectively prevents impurities in the wastewater from remaining on the inner wall of the heat transfer tube. When excessive impurities are filtered out of the filter cartridge, the rotating ring drives the filter cartridge, causing the stopper on the filter cartridge surface to align with the vertical groove on the inner wall of the third pipe. The elastic force generated by the compressed spring pushes the filter cartridge upward and off the third pipe, allowing it to be removed for cleaning. The quick-release design makes installation and removal of the filter cartridge simple and quick, without the need for complex tools or operating procedures.

[0015] 2. The utility model is provided with a reciprocating component. The starting motor drives the connecting cylinder to rotate through the transmission shaft. A limiting groove is provided on the inner wall of the connecting cylinder. The shape of the limiting groove is wavy. As the connecting cylinder rotates, the limiting protrusion slides along the wavy shape in the limiting groove, thereby driving the sliding rod to slide back and forth along the axis, causing the disturbance plate to move back and forth inside the shell, increasing the disturbance and turbulence of the fluid in the shell, making the flow of the fluid in the heat exchanger more complicated and chaotic, helping to break the fluid boundary layer, and improving the heat transfer coefficient to the heat transfer tube, thereby enhancing the heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the external structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 For this utility model Figure 2 A schematic diagram of the structure of the middle part;

[0020] Figure 4 This is a schematic diagram of the filtering structure of the utility model;

[0021] Figure 5 This is a schematic diagram of the reciprocating assembly structure of the utility model;

[0022] Figure 6 For this utility model Figure 5 A magnified schematic diagram of the structure of middle B;

[0023] Figure 7 This is a schematic diagram of the connecting tube structure of the utility model.

[0024] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0025] 1. Shell; 101. Head; 102. First connecting pipe; 103. Tube sheet; 104. Second connecting pipe; 105. Fourth connecting pipe; 106. Third connecting pipe; 107. Heat transfer pipe; 108. Baffle; 109. Vertical groove; 110. Support; 2. Filter assembly; 201. Filter box; 202. Ring; 203. Limit block; 204. Rotating plate; 205. Support rod; 206. Support plate; 207. Spring; 3. Reciprocating assembly; 301. Motor; 302. Connecting cylinder; 303. Limit groove; 304. Connecting ring; 305. Connecting rod; 306. Limit protrusion; 307. Sliding rod; 308. Disturbance plate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-7 As shown, the utility model provides an easy-to-clean high-efficiency shell and tube heat exchanger, including a shell 1, with heads 101 respectively sealed at both ends of the shell 1, a first pipe 102 fixedly connected to the top of the left end of the shell 1, and the first pipe 102 is connected to the interior of the shell 1, and a second pipe 104 is fixedly connected to the bottom of the right end of the shell 1, and the second pipe 104 is connected to the interior of the shell 1, and both end ports of the shell 1 are fixedly connected to tube sheets 103.

[0028] A third connecting pipe 106 is fixedly connected to the top of the left end seal 101 , and the third connecting pipe 106 is communicated with the interior of the end seal 101 .

[0029] The inner wall of the third connecting pipe 106 defines two vertical slots 109. A filter assembly 2 is disposed within the third connecting pipe 106. The filter assembly 2 comprises a filter cartridge 201 slidably connected to the inner wall of the third connecting pipe 106. A circular ring 202 is fixedly connected to the outer edge of the top opening of the filter cartridge 201, and the circular ring 202 is snap-fitted to the nozzle of the third connecting pipe 106. A rotating plate 204 is rotatably connected to the bottom of the filter cartridge 201. Two stoppers 203 are fixedly connected to the left and right outer walls of the filter cartridge 201.

[0030] A spring 207 and a support plate 206 are sequentially disposed below the rotating plate 204. Support rods 205 are vertically disposed on the left and right sides of the filter cartridge 201. The tops of the support rods 205 are fixedly connected to the inner wall of the head 101, and the bottoms of the support rods 205 are fixedly connected to the support plate 206. The lower end of the spring 207 is fixed to the support plate 206. The form of the filter cartridge 201 is not specifically limited and is composed of a support frame and a filter screen. The pore size of the filter screen is selected according to the sewage conditions.

[0031] By setting up the filter assembly 2, the pulp wastewater is introduced from the mouth of the third connecting pipe 106, and the wastewater enters the interior of the filter box 201. After the wastewater is filtered, it enters the heat transfer tube 107, which can effectively prevent impurities in the wastewater from remaining on the inner wall of the heat transfer tube 107. When too many impurities are filtered out from the interior of the filter box 201, the rotating ring 202 drives the filter box 201 to rotate. When the limit block 203 on the surface of the filter box 201 is aligned with the vertical groove 109, the elastic force generated by the spring 207 in the compressed state pushes the filter box 201 to move upward and away from the inner wall of the third connecting pipe 106, and the filter box 201 can be removed for cleaning. The quick-release design makes the installation and removal of the filter box 201 simple and quick. The filter device can be easily removed for cleaning without complicated tools or operating procedures, ensuring that the filtering effect is continuously effective.

[0032] When the cleaned filter cartridge 201 is placed into the mouth of the third connecting pipe 106 , the rotating plate 204 at the bottom of the filter cartridge 201 squeezes the spring 207 . When the limit block 203 enters the head 101 through the third connecting pipe 106 , the rotating ring 202 drives the filter cartridge 201 to rotate, causing the limit block 203 to be misaligned with the vertical slot 109 , so that the filter cartridge 201 is fixed in the third connecting pipe 106 .

[0033] Specifically, a flange may be provided around the lower portion of the pulp sewage pipe and the third connecting pipe 106 , the pulp sewage pipe is docked on the ring 202 , and the pulp sewage pipe is installed and connected by bolts passing through the flange and the flange on the pulp sewage pipe.

[0034] Furthermore, a plurality of heat transfer tubes 107 are provided in the shell 1, and the end of each heat transfer tube 107 passes through the corresponding tube sheet 103 and is connected to the inner cavity of the head 101. A baffle 108 is fixedly provided in the shell 1, and the heat transfer tube 107 passes through the baffle 108; the arrangement of the baffle and the heat transfer tube is a well-known technology in the art.

[0035] In another embodiment, a fourth connecting pipe 105 is fixedly connected to the bottom of the right end head, and the fourth connecting pipe 105 is connected to the interior of the head. A reciprocating assembly 3 is provided inside the head 101.

[0036] The reciprocating assembly 3 includes a motor 301 fixedly connected to the outside of the head 101. The output end of the motor 301 is fixedly connected to a connecting cylinder 302 via a transmission shaft. The connecting cylinder 302 is arranged in the head 101. The output shaft of the motor 301 is sealed and rotatably connected to the head.

[0037] Furthermore, a connecting ring 304 is rotatably connected to the outer side of the connecting cylinder 302 , and a connecting rod 305 is fixedly connected to the outer surface of the connecting ring 304 . The end of the connecting rod 305 away from the connecting cylinder 302 is fixedly connected to the inner wall of the head 101 .

[0038] The inner wall of the connecting tube 302 is surrounded by a limiting groove 303. This groove 303 is wavy in shape, forming a circular ring with peaks and troughs along its circumference. A sliding rod 307 is slidably connected to the end of the connecting tube 302. The sliding rod 307 is fixedly connected to a limiting protrusion 306 near the outer surface of the connecting tube 302. The outer surface of the limiting protrusion 306 is slidably connected to the inner wall of the limiting groove 303.

[0039] The sliding rod 307 slides sealingly through the corresponding tube sheet 103 and extends to the interior of the shell 1. The extended end of the sliding rod 307 is fixedly connected to the disturbance plate 308. The disturbance plate 308 is slidably connected to the outer surface of the heat transfer tube 107. The outer surface of the sliding rod 307 is slidably connected to the deflector 108. The bottom of the shell 1 is fixedly connected to two supports 110.

[0040] By providing a reciprocating assembly 3, a starting motor 301 drives the connecting cylinder 302 to rotate via a drive shaft. A wavy limiting groove 303 is defined on the inner wall of the connecting cylinder 302. As the connecting cylinder 302 rotates, the limiting protrusion 306 slides along the limiting groove 303, thereby driving the sliding rod 307 to slide back and forth along the inner wall of the connecting cylinder 302. As the sliding rod 307 reciprocates, the disturbance plate 308 on the sliding rod 307 reciprocates within the housing 1, increasing the disturbance and turbulence of the cold fluid, making the flow of the fluid in the heat exchanger more complex and chaotic. This turbulence helps break up the fluid boundary layer, improving the heat transfer coefficient to the heat transfer tube 107, and thus enhancing the heat exchange effect.

[0041] Connect the water pipe to the fourth connecting pipe 105, allowing cold water to enter the interior of the shell 1 through the fourth connecting pipe 105. The starting motor 301 drives the connecting cylinder 302 to rotate via the drive shaft. The inner wall of the connecting cylinder 302 is provided with a wavy limit groove 303. As the connecting cylinder 302 rotates, the limit protrusion 306 within the limit groove 303 slides along its inner wall, thereby driving the sliding rod 307 to slide back and forth within the connecting cylinder 302. As the sliding rod 307 reciprocates, the disturbance plate 308 at the end of the sliding rod 307 reciprocates within the shell 1, increasing the disturbance and turbulence of the cold fluid, making the flow in the heat exchanger more complex and chaotic. This turbulence helps break up the fluid boundary layer, improves the heat transfer coefficient to the heat transfer pipe 107, and thus enhances the heat exchange effect. The cold water after heat exchange is discharged through the first connecting pipe 102, and the cooled wastewater is finally discharged through the fourth connecting pipe 105.

[0042] The movable sealing connection method involved in the present invention is a conventional technical means in this field.

[0043] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0044] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An easy-to-clean high-efficiency shell and tube heat exchanger, characterized in that: The invention comprises a shell (1), wherein both ends of the shell (1) are respectively sealed with a head (101), the top of one end of the shell (1) is connected to a first connecting pipe (102), and the bottom of the other end of the shell (1) is connected to a second connecting pipe (104); tube sheets (103) are provided on both end ports of the shell (1), and the top of one of the heads (101) is connected to a third connecting pipe (106); The inner wall of the third connecting pipe (106) is provided with two vertical grooves (109), and a filter assembly (2) is provided inside the third connecting pipe (106). The filter assembly (2) includes a filter box (201) slidably connected to the third connecting pipe (106), and a ring (202) is fixedly connected to the outer edge of the top opening of the filter box (201), and the ring (202) is clamped on the pipe mouth of the third connecting pipe (106). A rotating plate (204) is rotatably provided at the bottom of the filter box (201). Two limit blocks (203) are fixedly connected to the left and right side walls of the outer side of the box (201), a spring (207) and a support plate (206) are sequentially arranged below the rotating plate (204), and support rods (205) are vertically arranged on the left and right sides of the filter box (201), the top of the support rod (205) is fixedly connected to the inner wall of the head (101), the bottom of the support rod (205) is fixedly connected to the support plate (206), and the lower end of the spring (207) is fixed on the support plate (206).

2. The easy-to-clean high-efficiency shell and tube heat exchanger according to claim 1, characterized in that: A plurality of heat transfer tubes (107) are arranged in the shell (1), and the end of each heat transfer tube (107) passes through the corresponding tube sheet (103) and is connected to the inner cavity of the head (101). A baffle (108) is fixedly arranged in the shell (1), and the heat transfer tube (107) passes through the baffle (108).

3. The easy-to-clean high-efficiency shell and tube heat exchanger according to claim 2, characterized in that: The bottom of the other end cap is connected to a fourth connecting pipe (105), and a reciprocating assembly (3) is provided inside the end cap (101); the reciprocating assembly (3) includes a motor (301) fixedly connected to the outside of the end cap (101), and the output end of the motor (301) is fixedly connected to a connecting cylinder (302) via a transmission shaft, and the connecting cylinder (302) is provided inside the end cap (101); A sliding rod (307) is slidably provided at the end of the connecting tube (302), a limiting groove (303) is provided around the inner wall of the connecting tube (302), and the limiting groove (303) is wavy in shape. A limiting protrusion (306) is fixedly provided at the end of the sliding rod (307), and the limiting protrusion (306) is slidably connected in the limiting groove (303); The sliding rod (307) seals and slides through the corresponding tube sheet (103) and extends into the interior of the shell (1). A disturbance plate (308) is fixedly connected to the sliding rod (307). The heat transfer tube (107) slides through the disturbance plate (308), and the sliding rod (307) slides through the deflector (108).

4. The easy-to-clean high-efficiency shell and tube heat exchanger according to claim 3, characterized in that: A connecting ring (304) is rotatably provided on the outer side of the connecting cylinder (302), a connecting rod (305) is fixedly provided on the outer side of the connecting ring (304), and the outer end of the connecting rod (305) is fixedly connected to the inner wall of the head (101).

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