Horizontal shell and tube type energy-saving heat exchanger

Abstract

The invention discloses a horizontal shell and tube type energy-saving heat exchanger, and relates to the technical field of heat exchangers, the horizontal shell and tube type energy-saving heat exchanger comprises a shell, the shell is used for containing and protecting internal heat exchange elements, and a supporting seat is fixedly mounted at the bottom of the shell. According to the horizontal shell and tube type energy-saving heat exchanger, solid heat conduction is conducted from the outer walls to the inner walls of the spiral tubes, heat on the outer surfaces of the tube walls is transferred from the outer walls to the inner walls by means of the heat conductivity of materials of the heat exchange tubes, the heat conduction efficiency depends on the heat conduction coefficient of the materials and the thickness of the tube walls, and the higher the coefficient is, the thinner the tube walls are and the smaller the heat conduction resistance is, so that the multiple sets of spiral tubes are arranged in the shell; convective heat transfer is achieved between the inner walls of the multiple sets of spiral pipes and pipe pass fluid, heat on the inner surfaces of the pipe walls is transferred to low-temperature fluid flowing in the pipes through convective heat transfer, the spiral pipes arranged in a spiral surrounding mode are longer than straight pipes with the same length, and the retention time of the fluid in the pipes is obviously prolonged. The cold and hot fluid has more sufficient time for heat exchange, and the probability that the fluid flows out without sufficient heat exchange is reduced.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, specifically to a horizontal shell-and-tube energy-saving heat exchanger. Background Technology

[0002] A shell-and-tube heat exchanger is an indirect heat exchanger that uses the wall of a tube bundle enclosed in a shell as the heat transfer surface. It consists of a shell, tube sheet, heat exchange tubes, end caps, baffles, etc. The required materials can be ordinary carbon steel, copper, or stainless steel. During heat exchange, one fluid enters through the connecting pipe of the end cap, flows through the tubes, and exits through the outlet pipe at the other end of the end cap; this is called the tube side. The other fluid enters through a connecting pipe in the shell and exits through another connecting pipe on the shell; this is called the shell side. This type of heat exchanger has a simple structure, low cost, wide flow cross-section, and is easy to clean for scale buildup. However, it has a low heat transfer coefficient and a large footprint. It can be manufactured using various structural materials (mainly metals) and can be used under high temperature and high pressure, making it the most widely used type.

[0003] Existing shell-and-tube heat exchangers mostly use municipal tap water for cooling during heat exchange. Tap water contains a lot of scale, which easily accumulates on the inner wall of the heat exchange pipes over time. Scale can affect the heat exchange efficiency of shell-and-tube heat exchangers. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a horizontal shell-and-tube energy-saving heat exchanger, comprising: a shell, which is used to accommodate and protect the internal heat exchange elements, a support base is fixedly installed at the bottom of the shell, and a shell-side outlet and a shell-side inlet are fixedly installed on the outer surface of the shell respectively; A flow guide box is used to connect heat exchange tubes and external pipes and to distribute fluid evenly. The flow guide box is fixedly installed on the outside of the shell. A heat exchanger assembly is fixedly installed inside the shell and extends through the flow guide box into its interior. A cleaning component is used to clean impurities from the inner wall of the housing and the surface of the heat exchanger assembly. The cleaning component is fixedly installed inside the cavity of the housing and is threadedly sleeved on the outer surface of the heat exchanger assembly.

[0005] Preferably, the flow guide tube box includes a flow guide cavity, a tube-side inlet fixedly installed at the top of the flow guide cavity, an external pipe threaded onto the outer surface of the flow guide cavity, a tube-side outlet fixedly installed at the bottom of the external pipe, and a tube sheet fixedly installed between the external pipe and the flow guide cavity. Positioning holes are formed on the surface of the tube sheet. Hot and cold fluids enter their respective independent flow channels to avoid direct mixing. Specifically, the tube-side fluid enters the flow guide cavity through the tube-side inlet on the heat exchanger flow guide tube box, is evenly distributed to the internal channels of each spiral tube, and then flows along the tube length within the heat exchanger. The shell-side fluid enters the shell through the shell-side inlet installed on the shell surface. Because baffles are installed in the shell side, the fluid cannot flow in a straight line and is forced to bypass the complex flow channels formed by the baffles, evenly flushing the outer surface of the heat exchange tubes and preventing fluid short-circuiting.

[0006] Preferably, the outer tube is fixedly installed on the outside of the shell, the tube sheet is fixedly installed on the outer surface of the heat exchange conductor, and the heat exchange conductor extends through the tube sheet into the interior of the flow guide cavity.

[0007] Preferably, the heat exchange conductor assembly includes positioning plates, and two positioning plates are provided. Each positioning plate has a locking hole on its surface, and a spiral guide is fixedly installed between the opposite surfaces of the positioning plates through the locking holes.

[0008] Preferably, several sets of spiral guides are provided, and these sets of spiral guides are fixedly installed inside the shell. The spiral guides extend through the positioning plate to its outer side. Solid heat conduction occurs from the outer wall to the inner wall of the spiral tube. The heat on the outer surface of the tube wall is transferred from the outer wall to the inner wall by means of the thermal conductivity of the heat exchange tube material. The heat conduction efficiency depends on the thermal conductivity coefficient of the material and the tube wall thickness. The higher the coefficient and the thinner the tube wall, the lower the thermal resistance. Therefore, multiple sets of spiral tubes are arranged inside the shell. The inner wall of the multiple sets of spiral tubes and the tube-side fluid undergo convective heat transfer. The heat on the inner surface of the tube wall is transferred to the low-temperature fluid flowing inside the tube through convection. The spiral tubes arranged in a spiral arrangement are longer than straight tubes of the same length, and the residence time of the fluid inside the tube is significantly increased. This allows the hot and cold fluids more time to exchange heat, reducing the probability of the fluid flowing out before sufficient heat exchange.

[0009] Preferably, the spiral guide includes a spiral tube, with a connecting bend fixedly installed on its surface. An inlet and an outlet are fixedly installed at both ends of the spiral tube, respectively. The outlet extends through the positioning plate into the interior of the outer tube, while the inlet extends through the positioning plate and the tube sheet into the interior of the flow guiding cavity. The hot and cold fluids that have completed heat exchange are discharged separately. The fluid that absorbs heat and increases in temperature within the tube side flows out from the outlet, merges into the outer tube, and is then discharged through the tube side outlet to enter subsequent processes. The fluid that releases heat and decreases in temperature within the shell side leaves the heat exchanger through the shell side outlet. The discharged low-temperature fluid or condensate can be further recycled, achieving energy savings.

[0010] Preferably, the cleaning component includes a baffle plate with flow guide holes on its surface. A guide rod is fixedly installed inside the flow guide holes, and a cleaning slider is slidably installed on the surface of the guide rod. Convective heat transfer occurs between the shell-side fluid and the outer wall of the helical tube. When the high-temperature shell-side fluid laterally washes against the tube wall, heat is transferred to the outer surface of the tube wall through convection. The baffle plate enhances the fluid turbulence, reduces the stagnant boundary layer, and improves heat transfer efficiency. If the fluid temperature is too high, some of it will condense outside the tube wall, releasing latent heat to further enhance heat transfer.

[0011] Preferably, the baffle is fixedly installed between the opposite faces of the positioning plate, and the baffle spirally wraps around the outer surface of the spiral tube. The cleaning slide is slidably installed inside the housing via the guide rod, and the cleaning slide is slidably adapted to the inside of the housing and the spiral tube. When the shell-side flow flows inside the housing, it pushes the cleaning slide to slide on the surface of the guide rod. At this time, the cleaning slide generates friction with the inner wall of the housing, and scrapes and cleans the impurities adhering to the inner wall of the housing, so as to avoid the impurities inside the housing settling and adhering to the inner wall of the housing.

[0012] Preferably, the cleaning slide includes a floating baffle. A groove is formed in the middle of the outer surface of the floating baffle, and flow grooves are formed on both sides of the outer surface of the floating baffle. A ball bearing is rotatably mounted on the top of the floating baffle, and a cleaning brush is disposed between adjacent surfaces of the ball bearing. The material density of the floating baffle is slightly less than that of the fluid. When the fluid flows through the shell side, the floating baffle deflects on the guide rod surface due to its own material properties, allowing it to naturally suspend with the fluid flow, thus cleaning scale, biological slime, and lightly suspended impurities adhering to the inner wall of the shell. The ball bearing contacts the inner wall of the shell and, with the fluid flow, drives the floating baffle to slide axially on the guide rod surface. The contact pressure between the bristles and the tube wall is affected by the fluid flow rate; the higher the flow rate, the greater the contact pressure and the stronger the cleaning effect.

[0013] Preferably, the floating fold is slidably mounted on the surface of the guide rod via a sleeve groove, the ball bearing is slidably adapted to the inner wall of the housing, and the cleaning brush is rubbed against the inner wall of the housing.

[0014] This invention provides a horizontal shell-and-tube energy-saving heat exchanger. It has the following beneficial effects: I. This horizontal shell-and-tube energy-saving heat exchanger allows hot and cold fluids to enter their respective independent channels, avoiding direct mixing. The tube-side fluid enters the flow guide cavity through the tube-side inlet on the heat exchanger's guide tube box, and is then evenly distributed to the internal channels of each spiral tube, flowing along the tube length within the heat exchanger. The shell-side fluid enters the shell through the shell-side inlet installed on the shell surface. Due to the baffles installed in the shell side, the fluid cannot flow in a straight line and is forced to bypass the complex flow channels formed by the baffles, evenly flushing the outer surface of the heat exchange tubes and preventing short-circuiting.

[0015] II. This horizontal shell-and-tube energy-saving heat exchanger conducts solid heat through the outer wall of the spiral tubes to the inner wall. Heat from the outer surface of the tube wall is transferred to the inner wall via the thermal conductivity of the tube material. The heat transfer efficiency depends on the thermal conductivity coefficient of the material and the tube wall thickness; a higher coefficient and a thinner wall result in lower thermal resistance. Therefore, multiple sets of spiral tubes are installed inside the shell. Heat transfer occurs through convection between the inner wall of these spiral tubes and the fluid flowing through them. Heat from the inner surface of the tube wall is transferred to the low-temperature fluid flowing inside the tubes via convection. The spiral tubes, arranged in a spiral configuration, are longer than straight tubes of the same length, significantly increasing the residence time of the fluid within the tubes. This allows for more time for heat exchange between the hot and cold fluids, reducing the probability of fluid flowing out before sufficient heat exchange.

[0016] 3. This horizontal shell-and-tube energy-saving heat exchanger transfers heat through convection between the shell-side fluid and the outer wall of the spiral tube. When the high-temperature shell-side fluid laterally washes over the tube wall, heat is transferred to the outer surface of the tube wall through convection. Because there are baffles in the shell side, the fluid cannot flow in a straight line and is forced to flow around the complex flow channel formed by the baffles, uniformly washing the outer surface of the heat exchange tube, avoiding fluid short-circuiting. The baffles enhance the degree of fluid turbulence, reduce the stagnant boundary layer, and improve the heat transfer efficiency. If the fluid temperature is too high, some of it will condense on the outside of the tube wall, releasing latent heat to further enhance heat transfer.

[0017] IV. This horizontal shell-and-tube energy-saving heat exchanger utilizes floating baffles whose material density is slightly less than that of the fluid. When fluid flows through the shell side, the floating baffles deflect on the guide rod surface due to their material composition, allowing them to naturally suspend with the fluid flow. This effectively cleans scale, biological sludge, and lightly suspended impurities adhering to the inner wall of the shell. The ball bearings contact the inner wall of the shell and, with the fluid flow, drive the floating baffles to slide axially on the guide rod surface. The contact pressure between the bristles and the tube wall is affected by the fluid velocity; the higher the velocity, the greater the contact pressure and the stronger the cleaning effect.

[0018] V. This horizontal shell-and-tube energy-saving heat exchanger allows for the separate discharge of hot and cold fluids after heat exchange. Fluid that absorbs heat and increases in temperature within the tubes flows out from the outlet, merges into the outer tube, and is then discharged through the tube outlet to enter subsequent processes. Fluid that releases heat and decreases in temperature within the shell leaves the heat exchanger through the shell outlet. The discharged low-temperature fluid or condensate can be further recycled, achieving energy transfer. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of a horizontal shell-and-tube energy-saving heat exchanger according to the present invention. Figure 2 This is a schematic diagram of the external structure of a horizontal shell-and-tube energy-saving heat exchanger according to the present invention from another angle. Figure 3 This is a schematic cross-sectional view of the internal structure of the housing of the present invention; Figure 4This is a schematic cross-sectional view of the flow guide box of the present invention; Figure 5 This is a schematic diagram of the connection structure between the heat exchange conductor assembly and the cleaning assembly of the present invention; Figure 6 This is a schematic diagram of the disassembled structure of the spiral guide of the present invention; Figure 7 This is a cross-sectional structural diagram of the cleaning component and housing of the present invention; Figure 8 This is a schematic diagram of the cleaning component structure of the present invention; Figure 9 This is an enlarged structural schematic diagram of the cleaning slider of the present invention; Figure 10 This is a schematic diagram of the cleaning slider of the present invention.

[0020] In the diagram: 1. Shell-side outlet; 2. Shell; 3. Flow guide box; 31. Tube-side inlet; 32. Positioning hole; 33. External pipe; 34. Tube-side outlet; 35. Tube sheet; 36. Flow guide cavity; 4. Support seat; 5. Shell-side inlet; 6. Heat exchanger assembly; 61. Spiral guide; 611. Inlet; 612. Spiral tube; 613. Connecting bend; 614. Outlet; 62. Clip hole; 63. Positioning plate; 7. Cleaning assembly; 71. Baffle plate; 72. Flow guide hole; 73. Guide rod; 74. Cleaning slide; 741. Floating baffle; 742. Sleeve groove; 743. Flow groove; 744. Ball bearing; 745. Cleaning brush. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] First embodiment, such as Figures 1 to 10 As shown, the present invention provides a technical solution: a horizontal shell-and-tube energy-saving heat exchanger, comprising: a shell 2, which is used to accommodate and protect the internal heat exchange elements, a support base 4 is fixedly installed at the bottom of the shell 2, and a shell-side outlet 1 and a shell-side inlet 5 are fixedly installed on the outer surface of the shell 2 respectively; The flow guide box 3 is used to connect the heat exchange tube and the external pipe and to distribute the fluid evenly. The flow guide box 3 is fixedly installed on the outside of the shell 2. The flow guide tube box 3 includes a flow guide cavity 36. A tube-side inlet 31 is fixedly installed at the top of the flow guide cavity 36. An external pipe 33 is threaded onto the outer surface of the flow guide cavity 36. A tube-side outlet 34 is fixedly installed at the bottom of the external pipe 33. A tube sheet 35 is fixedly installed between the external pipe 33 and the flow guide cavity 36. Positioning holes 32 are opened on the surface of the tube sheet 35. Hot and cold fluids enter their respective independent flow channels to avoid direct mixing. Specifically, the tube-side fluid enters the flow guide cavity 36 through the tube-side inlet 31 on the heat exchanger flow guide tube box 3, and is evenly distributed to the internal channels of each spiral tube 612 through the flow guide cavity 36, and then flows along the tube length in the heat exchanger; the shell-side fluid enters the interior of the shell 2 through the shell-side inlet 5 installed on the surface of the shell 2. Because there is a baffle 71 in the shell side, the fluid cannot flow in a straight line and is forced to bypass the complex flow channel formed by the baffle 71, evenly flushing the outer surface of the heat exchange tube, avoiding fluid short-circuiting.

[0023] The outer tube 33 is fixedly installed on the outside of the shell 2, the tube sheet 35 is fixedly installed on the outer surface of the heat exchanger assembly 6, and the heat exchanger assembly 6 extends through the tube sheet 35 into the interior of the flow guide cavity 36.

[0024] Heat exchanger assembly 6 is fixedly installed inside the housing 2 and extends through the flow guide box 3 into its interior. Cleaning component 7 is used to clean impurities from the inner wall of the housing 2 and the surface of the heat exchanger assembly 6. The cleaning component 7 is fixedly installed inside the cavity of the housing 2 and is threadedly sleeved on the outer surface of the heat exchanger assembly 6.

[0025] The second embodiment is based on the first embodiment; please refer to [link / reference]. Figures 5 to 6 As shown, the heat exchange conductor group 6 includes a positioning plate 63. There are two positioning plates 63. Each of the two positioning plates 63 has a locking hole 62 on its surface. A spiral guide 61 is fixedly installed between the opposite surfaces of the positioning plates 63 through the locking hole 62.

[0026] Several sets of spiral guides 61 are provided, and these sets of spiral guides 61 are fixedly installed inside the shell 2. The spiral guides 61 extend through the positioning plate 63 to its outer side. Solid heat conduction occurs from the outer wall to the inner wall of the spiral tube 612. The heat on the outer surface of the tube wall is transferred from the outer wall to the inner wall by means of the thermal conductivity of the heat exchange tube material. The heat conduction efficiency depends on the thermal conductivity coefficient of the material and the tube wall thickness. The higher the coefficient and the thinner the tube wall, the lower the thermal resistance. Therefore, multiple sets of spiral tubes 612 are provided inside the shell 2. The inner wall of the multiple sets of spiral tubes 612 and the tube-side fluid undergo convective heat transfer. The heat on the inner surface of the tube wall is transferred to the low-temperature fluid flowing inside the tube through convection. The spiral tube 612 with a spiral arrangement is longer than a straight tube of the same length, and the residence time of the fluid in the tube is significantly increased. This allows the hot and cold fluids more time to exchange heat, reducing the probability of the fluid flowing out before sufficient heat exchange.

[0027] The spiral guide 61 includes a spiral tube 612, on the surface of which a connecting bend 613 is fixedly installed. An inlet 611 and an outlet 614 are fixedly installed at both ends of the spiral tube 612. The outlet 614 extends through the positioning plate 63 into the interior of the outer tube 33, while the inlet 611 extends through the positioning plate 63 and the tube sheet 35 into the interior of the flow guiding cavity 36. The hot and cold fluids that have completed heat exchange are discharged separately. The fluid that absorbs heat and increases in temperature in the tube side flows out from the outlet 614, merges into the outer tube 33, and is then discharged through the tube side outlet 34 to enter subsequent processes. The fluid that releases heat and decreases in temperature in the shell side leaves the heat exchanger through the shell side outlet 1. The discharged low-temperature fluid or condensate can be further recycled, achieving energy savings.

[0028] The third embodiment is based on embodiments one and two; please refer to [link / reference]. Figures 7 to 10 As shown, the cleaning component 7 includes a baffle plate 71, with flow guide holes 72 on its surface. A guide rod 73 is fixedly installed inside the flow guide holes 72, and a cleaning slider 74 is slidably installed on the surface of the guide rod 73. Heat transfer occurs between the shell-side fluid and the outer wall of the helical tube 612 via convection. When the high-temperature shell-side fluid laterally washes against the tube wall, heat is transferred to the outer surface of the tube wall through convection. The baffle plate 71 enhances the fluid turbulence, reduces the stagnant boundary layer, and improves heat transfer efficiency. If the fluid temperature is too high, some of it will condense outside the tube wall, releasing latent heat to further enhance heat transfer.

[0029] The baffle plate 71 is fixedly installed between the opposite faces of the positioning plate 63, and the baffle plate 71 spirally wraps around the outer surface of the spiral tube 612. The cleaning slide 74 is slidably installed inside the housing 2 via the guide rod 73, and the cleaning slide 74 is slidably adapted to the inside of the housing 2 and the spiral tube 612. When the shell-side flow flows inside the housing 2, it pushes the cleaning slide 74 to slide on the surface of the guide rod 73. At this time, the cleaning slide 74 generates friction with the inner wall of the housing 2, and scrapes and cleans the impurities attached to the inner wall of the housing 2, so as to prevent impurities from settling and adhering to the inner wall of the housing 2.

[0030] The cleaning slide 74 includes a floating baffle 741. A groove 742 is formed in the middle of the outer surface of the floating baffle 741, and flow grooves 743 are formed on both sides of the outer surface. A ball bearing 744 is rotatably mounted on the top of the floating baffle 741, and a cleaning brush 745 is disposed between adjacent surfaces of the ball bearing 744. The material density of the floating baffle 741 is slightly less than that of the fluid. When the fluid flows through the shell side, the floating baffle 741 deflects on the surface of the guide rod 73 due to its own material properties, and can naturally suspend with the flow of the fluid to clean scale, biological slime, and lightly suspended impurities adhering to the inner wall of the shell 2. The ball bearing 744 contacts the inner wall of the shell 2 and, with the flow of the fluid, drives the floating baffle 741 to slide axially on the surface of the guide rod 73. The contact pressure between the bristles and the tube wall is affected by the fluid flow rate; the higher the flow rate, the greater the contact pressure and the stronger the cleaning effect.

[0031] The floating folding block 741 is slidably mounted on the surface of the guide rod 73 through the sleeve groove 742, the ball bearing 744 is slidably adapted to the inner wall of the housing 2, and the cleaning brush 745 is rubbed against the inner wall of the housing 2.

[0032] During use, the hot and cold fluids enter their respective independent flow channels to avoid direct mixing. Specifically, the tube-side fluid enters the flow guide cavity 36 through the tube-side inlet 31 on the heat exchanger's flow guide tube box 3, and is then evenly distributed to the internal channels of each spiral tube 612, and then flows along the tube length within the heat exchanger. The shell-side fluid enters the interior of the shell 2 through the shell-side inlet 5 installed on the surface of the shell 2. Because there are baffles 71 inside the shell side, the fluid cannot flow in a straight line and is forced to bypass the complex flow channels formed by the baffles 71, evenly flushing the outer surface of the heat exchange tubes to avoid fluid short-circuiting.

[0033] Solid-state heat conduction occurs from the outer wall to the inner wall of the spiral tube 612. Heat from the outer surface of the tube wall is transferred to the inner wall via the thermal conductivity of the heat exchange tube material. The heat conduction efficiency depends on the thermal conductivity coefficient of the material and the tube wall thickness; the higher the coefficient and the thinner the tube wall, the lower the thermal resistance. Therefore, multiple sets of spiral tubes 612 are arranged inside the shell 2. Convection heat transfer occurs between the inner wall of the spiral tubes 612 and the fluid flowing through the tube. Heat from the inner surface of the tube wall is transferred to the low-temperature fluid flowing inside the tube via convection. The spiral tubes 612, arranged in a spiral configuration, are longer than straight tubes of the same length, significantly increasing the residence time of the fluid inside the tube. This allows for more time for heat exchange between the hot and cold fluids, reducing the probability of fluid flowing out before sufficient heat exchange.

[0034] Heat transfer occurs between the shell-side fluid and the outer wall of the spiral tube 612 via convection. When the high-temperature shell-side fluid flows laterally across the tube wall, heat is transferred to the outer surface of the tube wall through convection. Because the shell-side fluid is equipped with baffles 71, the fluid cannot flow in a straight line and is forced to flow around the complex flow channel formed by the baffles 71, uniformly scouring the outer surface of the heat exchange tube to avoid fluid short-circuiting. The baffles 71 enhance the degree of fluid turbulence, reduce the stagnant boundary layer, and improve heat transfer efficiency. If the fluid temperature is too high, some of it will condense outside the tube wall, releasing latent heat to further enhance heat transfer.

[0035] When the shell side flows inside the shell 2, it pushes the cleaning slide 74 to slide on the surface of the guide rod 73. At this time, the cleaning slide 74 rubs against the inner wall of the shell 2 and scrapes and cleans the impurities attached to the inner wall of the shell 2 to prevent impurities from settling and adhering to the inner wall of the shell 2.

[0036] The floating baffle 741 has a material density slightly less than that of the fluid. When the fluid flows through the shell side, the floating baffle 741 deflects on the surface of the guide rod 73 due to its own material properties, and can naturally suspend with the flow of the fluid to clean scale, biological slime, and lightly suspended impurities adhering to the inner wall of the shell 2. The ball bearing 744 contacts the inner wall of the shell 2 and, with the flow of the fluid, drives the floating baffle 741 to slide axially on the surface of the guide rod 73. The contact pressure between the bristles and the tube wall is affected by the fluid flow rate; the higher the flow rate, the greater the contact pressure and the stronger the cleaning effect.

[0037] The hot and cold fluids that have completed heat exchange are discharged separately. The fluid that absorbs heat and its temperature rises in the tube side flows out from the outlet 614, flows into the external tube 33, and then is discharged through the tube side outlet 34 to enter the subsequent process. The fluid that releases heat and its temperature drops in the shell side leaves the heat exchanger through the shell side outlet 1. The discharged low-temperature fluid or condensate can be further recycled to achieve energy savings.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A horizontal shell-and-tube energy-saving heat exchanger, characterized in that, include: The shell (2) is used to house and protect the internal heat exchange elements. A support base (4) is fixedly installed at the bottom of the shell (2). A shell-side outlet (1) and a shell-side inlet (5) are fixedly installed on the outer surface of the shell (2). The flow guide box (3) is used to connect the heat exchange tube and the external pipe and to distribute the fluid evenly. The flow guide box (3) is fixedly installed on the outside of the shell (2). Heat exchanger assembly (6), which is fixedly installed inside the shell (2) and extends through the flow guide box (3) into its interior; Cleaning component (7) is used to clean impurities from the inner wall of the housing (2) and the surface of the heat exchanger assembly (6). The cleaning component (7) is fixedly installed inside the cavity of the housing (2) and is threadedly sleeved on the outer surface of the heat exchanger assembly (6).

2. A horizontal shell-and-tube energy-saving heat exchanger according to claim 1, characterized in that: The flow guide box (3) includes a flow guide cavity (36), a tube inlet (31) is fixedly installed at the top of the flow guide cavity (36), an outer tube (33) is threadedly installed on the outer surface of the flow guide cavity (36), a tube outlet (34) is fixedly installed at the bottom of the outer tube (33), a tube sheet (35) is fixedly installed between the outer tube (33) and the flow guide cavity (36), and a positioning hole (32) is opened on the surface of the tube sheet (35).

3. A horizontal shell-and-tube energy-saving heat exchanger according to claim 2, characterized in that: The outer tube (33) is fixedly installed on the outside of the shell (2), the tube sheet (35) is fixedly installed on the outer surface of the heat exchange conductor (6), and the heat exchange conductor (6) extends through the tube sheet (35) to the inside of the flow guide cavity (36).

4. A horizontal shell-and-tube energy-saving heat exchanger according to claim 1, characterized in that: The heat exchange conductor assembly (6) includes a positioning plate (63), and there are two positioning plates (63). Each of the two positioning plates (63) has a locking hole (62) on its surface. A spiral guide (61) is fixedly installed between the opposite surfaces of the positioning plates (63) through the locking hole (62).

5. A horizontal shell-and-tube energy-saving heat exchanger according to claim 4, characterized in that: The spiral guide (61) is provided in several groups, and the spiral guide (61) is fixedly installed inside the housing (2). The spiral guide (61) extends through the positioning plate (63) to its outer side.

6. A horizontal shell-and-tube energy-saving heat exchanger according to claim 5, characterized in that: The spiral guide (61) includes a spiral tube (612), and a connecting bend (613) is fixedly installed on the surface of the spiral tube (612). An inlet (611) and an outlet (614) are fixedly installed at both ends of the spiral tube (612). The outlet (614) extends through the positioning plate (63) to the inside of the outer pipe (33), and the inlet (611) extends through the positioning plate (63) and the tube sheet (35) to the inside of the guide cavity (36).

7. A horizontal shell-and-tube energy-saving heat exchanger according to claim 1, characterized in that: The cleaning component (7) includes a baffle plate (71), the surface of which is provided with a guide hole (72), a guide rod (73) is fixedly installed inside the guide hole (72), and a cleaning slide (74) is slidably installed on the surface of the guide rod (73).

8. A horizontal shell-and-tube energy-saving heat exchanger according to claim 7, characterized in that: The baffle (71) is fixedly installed between the opposite faces of the positioning plate (63), and the baffle (71) spirally surrounds the outer surface of the spiral tube (612). The cleaning slide (74) is slidably installed inside the housing (2) through the guide rod (73), and the cleaning slide (74) is slidably adapted to the inside of the housing (2) and the spiral tube (612).

9. A horizontal shell-and-tube energy-saving heat exchanger according to claim 8, characterized in that: The cleaning slide (74) includes a floating fold block (741), a sleeve groove (742) is provided in the middle of the outer surface of the floating fold block (741), flow grooves (743) are provided on both sides of the outer surface of the floating fold block (741), a ball bearing (744) is rotatably mounted on the top of the floating fold block (741), and a cleaning brush (745) is provided between the adjacent surfaces of the ball bearing (744).

10. A horizontal shell-and-tube energy-saving heat exchanger according to claim 9, characterized in that: The floating fold (741) is slidably mounted on the surface of the guide rod (73) through the sleeve groove (742), the ball (744) is slidably adapted to the inner wall of the housing (2), and the cleaning brush (745) is rubbed against the inner wall of the housing (2).

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