A recycling and reuse system for industrial waste heat

Abstract

The present invention discloses a recycling and reuse system for industrial waste heat, which relates to the technical field of heat exchange, and includes an upper heat exchanger, a lower heat exchanger, a mounting frame, a heat exchange tube group, a baffle plate group, and a plate group adjusting mechanism. In this application, the upper heat exchanger and the lower heat exchanger are arranged on the mounting frame, and the industrial waste heat fluid flows from the upper heat exchanger to the lower heat exchanger, while the water flows from the lower heat exchanger to the upper heat exchanger, so as to realize the secondary heat exchange treatment of the industrial waste heat fluid, so that the low-temperature waste heat section of the industrial waste heat fluid can first preheat the newly incoming cold water, and the high-temperature section of the industrial waste heat fluid exchanges heat with the preheated water, effectively improving the continuous heat exchange efficiency of the heat exchanger. At the same time, by arranging a plate group adjusting mechanism in the heat exchanger, the upper baffle plate and the lower baffle plate are respectively driven to move on the heat exchange tube group to adjust the distance between the baffle plate groups, so as to adjust the flow rate of the industrial waste heat fluid in the heat exchanger, and further improve the continuous heat exchange efficiency of the heat exchanger.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange, and particularly relates to a system for recycling industrial waste heat. Background Art

[0002] Industrial waste heat includes industrial waste gas and industrial waste water. Among them, industrial waste gas refers to the toxic and harmful gases discharged during the production and living processes, especially in chemical plants, steel plants, pharmaceutical factories, as well as coking plants and oil refineries, etc. A large amount of heat is contained in industrial waste gas. Industrial waste water refers to the waste liquid generated during the industrial production process. Among them, the waste liquid contains industrial production materials, intermediate products, by-products with relatively high heat lost with the waste water, as well as pollutants generated during the production process. Therefore, the waste water generated in industry usually has a very high temperature. Industrial waste gas and industrial waste water are collectively referred to as industrial waste heat fluid.

[0003] Currently, the heat recovery of industrial waste heat fluid generally adopts the method of heat exchange. For example, a new type of shell-and-tube heat exchanger device with the publication number of CN222086785U includes a head, a tank body, a sealing splint, a partition plate, a pipeline, a baffle plate, and a support rod; the head is connected to one side of the opening of the tank body, and the other side of the tank body is sealed; a first inlet is arranged at the top of the head, a first outlet is arranged at the bottom of the head, the partition plate is arranged inside the head, the partition plate is arranged along the horizontal direction of the head, the first inlet is located above the partition plate, the first outlet is located below the partition plate, and the partition plate is used to separate the first inlet and the first outlet; a second inlet is arranged at the upper part of the tank body, and a second outlet is arranged at the lower part of the tank body; one end of the pipeline is communicated with the upper part of the partition plate, the other end of the pipeline is communicated with the lower part of the partition plate, the pipeline extends along the length direction of the tank body and is arc-shaped at the end of the tank body, and the liquid flowing through the first inlet of the head is transported through the pipeline and flows out from the first outlet; a plurality of the baffle plates are arranged at intervals in the tank body, the baffle plates are arranged along the vertical direction, the support rod extends along the length direction of the tank body, the support rod is connected with the baffle plate, two support rods are respectively arranged above and below the inside of the tank body and are arranged in parallel, and the ends of the upper support rod and the lower support rod are connected by a connecting rod; the other end of the support rod is fixedly arranged on the end face of the sealing splint; the sealing splint is clamped at the connection between the head and the tank body, and the end of the pipeline passes through the sealing splint.

[0004] The heat exchanger device disclosed above improves the stability at the end connection by fixedly connecting a sealing splint between the head and the tank body, preventing the liquid flow inside the tank body from flowing into the inside of the head. To improve the installation stability of the baffle inside the tank body and prevent the impact on the internal baffle when the cold fluid flow rate is too high or the pressure is too high, a support rod is arranged inside the tank body. The support rod is used to fixedly connect with the baffle. The upper support rod and the lower support rod located in the upper part and the lower part inside the tank body are respectively connected in parallel and connected by a connecting rod at the end, thereby ensuring the connection stability of the support rod. And the end of the support rod is fixedly connected with the sealing splint, so that the sealing and assembly of the inlet and outlet of the tube side can be realized through the sealing splint, and the assembly stability of the baffle inside the tank body is improved through the support rod.

[0005] However, the above heat exchanger device adopts a single shell structure. During the continuous use of the heat exchanger device, the temperature inside and on the inner wall will reach a certain thermal equilibrium, so that the waste heat fluid passing through it will carry a part of the heat and be discharged, and the waste heat cannot be recycled secondarily. Therefore, the present application proposes a double shell type system for the recovery and reuse of industrial waste heat. Summary of the Invention

[0006] The object of the present invention is to address the deficiencies in the above technologies and propose a system for the recovery and reuse of industrial waste heat, aiming to solve the problem that the above heat exchanger device adopts a single shell structure and cannot recycle waste heat secondarily.

[0007] The present invention provides a system for the recovery and reuse of industrial waste heat, including:

[0008] An upper heat exchanger, which is provided with an upper connection port for accessing industrial waste heat fluid, an upper discharge port for discharging industrial waste heat fluid, and an upper inlet and an upper outlet for water to flow in and out;

[0009] A lower heat exchanger, which is provided with a lower connection port for connecting with the upper discharge port and a lower discharge port for discharging industrial waste heat fluid; one end of the lower heat exchanger is provided with a lower inlet and a lower outlet, and the lower outlet is connected with the upper inlet;

[0010] A mounting rack, on which the upper heat exchanger and the lower heat exchanger are fixedly arranged;

[0011] A heat exchange tube group, which is respectively arranged inside the upper heat exchanger and the lower heat exchanger; inside the upper heat exchanger and the lower heat exchanger, there are baffle plate groups for slowing down the flow of industrial waste heat fluid. The baffle plate group includes an upper baffle plate and a lower baffle plate. The upper baffle plate includes an upper baffle plate one and an upper baffle plate two, and the lower baffle plate includes a lower baffle plate one and a lower baffle plate two. The upper baffle plate one and the lower baffle plate two are slidably arranged on the heat exchange tube group, and the upper baffle plate two and the lower baffle plate one are fixedly arranged on the heat exchange tube group;

[0012] The plate group adjusting mechanism is arranged inside the upper heat exchanger and / or the lower heat exchanger, and includes an upper screw rod and a lower screw rod. The upper screw rod is in threaded connection with the first upper baffle plate, and the lower screw rod is in threaded connection with the second lower baffle plate. The upper screw rod is provided with first external threads and second external threads with opposite thread directions at intervals, and the lower screw rod is provided with third external threads. By rotating the upper screw rod and the lower screw rod, the two adjacent first upper baffle plates move relatively, and the second lower baffle plate moves to engage with the second upper baffle plate to adjust the distance between the baffle plate groups.

[0013] Preferably, the upper baffle plates and the lower baffle plates are vertically and crosswise arranged along the axial direction of the heat exchanger, so that the upper baffle plates are separated from each other and the lower baffle plates are separated from each other, so that the industrial waste heat fluid flows in an "S" shape inside the upper heat exchanger and the lower heat exchanger.

[0014] The plate group adjusting mechanism further includes a driving motor. The upper screw rod rotates inside the upper heat exchanger and / or the lower heat exchanger and is in threaded connection with the upper baffle plate, and the lower screw rod rotates inside the upper heat exchanger and / or the lower heat exchanger and is in threaded connection with the lower baffle plate; the driving motor is arranged on one side of the outer end of the upper heat exchanger and / or the lower heat exchanger, and the output end of the driving motor is in meshing transmission with the transmission gears at the ends of the upper screw rod and the lower screw rod through gears.

[0015] Preferably, two first upper baffle plates are slidably arranged on both sides of each fixed second upper baffle plate, and one second lower baffle plate is slidably arranged on one side of each fixed first lower baffle plate. The pitch of the third external threads is greater than the pitch of the first external threads and the second external threads, so that when the first upper baffle plate moves to the horizontal middle of the second upper baffle plate and the first lower baffle plate under the rotation of the upper screw rod, the second lower baffle plate moves to engage with the second upper baffle plate under the rotation of the lower screw rod, so that the second lower baffle plate and the second upper baffle plate engage to form a baffle structure with the same shape and structure as the first lower baffle plate.

[0016] Preferably, the heat exchange tube group includes a first heat exchange tube group and a second heat exchange tube group. Both the first heat exchange tube group and the second heat exchange tube group include multiple U-shaped heat exchange tubes. Both the upper heat exchanger and the lower heat exchanger include a heat exchange cavity and a water inlet and outlet cavity. The water inlet and outlet cavity is connected to the heat exchange cavity. One ends of the multiple U-shaped heat exchange tubes communicate with the water inlet and outlet cavity, and the other ends of the multiple U-shaped heat exchange tubes are sleeved with support plates; the support plates are fixedly connected to the water inlet and outlet cavity through connecting rods.

[0017] Preferably, a main scraper is also slidably arranged on the heat exchange tube group. The main scraper is slidably arranged on the first heat exchange tube group and the second heat exchange tube group. The upper screw rod and / or the lower screw rod is also provided with a first reciprocating thread groove, and the main scraper is in threaded connection with the upper screw rod and / or the lower screw rod through the first reciprocating thread groove.

[0018] A secondary scraper is also slidably arranged on the heat exchange tube group. The secondary scraper is located at the end of the heat exchange tube group and on one side of the support plate. The upper screw rod and / or the lower screw rod is also provided with a second reciprocating thread groove, and the secondary scraper is in threaded connection with the upper screw rod and / or the lower screw rod through the second reciprocating thread groove.

[0019] The pitches of the reciprocating thread grooves one and two are greater than the pitches of the external threads one and two, so that when the upper baffle one moves to the horizontal middle parts of the upper baffle two and the lower baffle one under the rotation of the upper screw rod, the main scraper and the auxiliary scraper reciprocate and return to fit with the support plate on the upper screw rod and / or the lower screw rod.

[0020] Preferably, it further includes a temperature monitor, which is arranged on the upper discharge port of the upper heat exchanger and / or the lower discharge port of the lower heat exchanger to monitor the temperature of the industrial waste heat fluid flowing from the upper discharge port into the lower heat exchanger.

[0021] Compared with the prior art, it has the following beneficial effects:

[0022] 1. In this application, the upper heat exchanger and the lower heat exchanger are arranged on the mounting frame, and the industrial waste heat fluid flows from the upper heat exchanger to the lower heat exchanger, and the water flows from the lower heat exchanger to the upper heat exchanger, so as to realize the secondary heat exchange treatment of the industrial waste heat fluid, so that the low-temperature waste heat section of the industrial waste heat fluid can first preheat the newly incoming cold water, and the high-temperature section of the industrial waste heat fluid exchanges heat with the preheated water, effectively improving the continuous heat exchange efficiency of the heat exchanger.

[0023] 2. By arranging a plate group adjusting mechanism in the heat exchanger to respectively drive the upper baffle and the lower baffle to move on the heat exchange tube group to adjust the distance between the baffle groups, thereby adjusting the number and width of the "S" flow channels in the heat exchanger, and thus adjusting the flow rate of the industrial waste heat fluid in the heat exchanger, further improving the continuous heat exchange efficiency of the heat exchanger.

[0024] 3. In this application, by arranging the main scraper, the auxiliary scraper, and the movable upper baffle one and lower baffle two, and relying on the upper screw rod and the lower screw rod on the plate group adjusting mechanism to clean the outer wall of the heat exchange tube group, effectively reducing the problem of the reduction of the heat exchange efficiency caused by scaling on the heat exchange tube group. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only the preferred embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic structural diagram of a system for the recovery and reuse of industrial waste heat according to the present invention;

[0027] Figure 2 It is a schematic structural diagram of a system for the recovery and reuse of industrial waste heat according to the present invention;

[0028] Figure 3 It is a schematic structural diagram of the heat exchange tube group of the present invention;

[0029] Figure 4 It is a schematic structural diagram of the heat exchange tube group of the present invention;

[0030] Figure 5 It is a schematic diagram of another embodiment of the heat exchange tube group of the present invention

[0031] Figure 6 It is a schematic internal diagram of the upper heat exchanger of the present invention;

[0032] Figure 7 It is Figure 6 an enlarged schematic diagram of part A in;

[0033] Figure 8 It is Figure 6 an enlarged schematic diagram of part B in;

[0034] Figure 9 It is a schematic internal diagram of the upper heat exchanger of the present invention;

[0035] Figure 10 It is Figure 9 an enlarged schematic diagram of part C in;

[0036] Figure 11 It is a schematic diagram of the baffle plate group and the plate group adjusting mechanism of the present invention;

[0037] Figure 12 It is Figure 11 an enlarged schematic diagram of part D in;

[0038] Figure 13 It is a schematic diagram of the baffle plate group and the plate group adjusting mechanism of the present invention;

[0039] Figure 14 It is Figure 13 an enlarged schematic diagram of part E in;

[0040] Figure 15 It is a schematic diagram of the baffle plate group before adjustment of the present invention;

[0041] Figure 16 It is a schematic diagram of the baffle plate group after adjustment of the present invention;

[0042] Figure 17 It is Figure 16 an enlarged schematic diagram of part F in.

[0043] In the figure, 1 - upper heat exchanger; 11 - upper connection port; 12 - upper discharge port; 13 - upper inlet; 14 - upper outlet; 15 - water inlet and outlet cavity; 151 - water inlet cavity; 152 - water outlet cavity; 16 - partition;

[0044] 2-Lower heat exchanger; 21-Lower connection port; 22-Lower discharge port; 23-Lower inlet; 24-Lower outlet;

[0045] 3-Mounting bracket;

[0046] 4-Heat exchange tube group; 41-First heat exchange tube group; 42-Second heat exchange tube group; 400-U-shaped heat exchange tube

[0047] 5-Baffle plate group; 51-First upper baffle plate; 52-Second upper baffle plate; 53-First lower baffle plate; 54-Second lower baffle plate;

[0048] 6-Board group adjustment mechanism; 61-Upper screw; 62-Lower screw; 63-Driving motor; 64-Driving gear; 611-First external thread; 612-Second external thread; 613-First reciprocating thread groove; 614-Second reciprocating thread groove; 621-Third external thread;

[0049] 7-Main scraper;

[0050] 8-Auxiliary scraper;

[0051] 9-Temperature monitor;

[0052] 10-Support plate; 101-Connecting rod. Detailed implementation mode

[0053] In order to more easily understand the structure of the present invention and the functional features and advantages that can be achieved, the following will describe the preferred embodiments of the present invention in detail in conjunction with the drawings as follows:

[0054] Embodiment 1:

[0055] As Figures 1 to 14 shown, the present invention provides a system for the recovery and reuse of industrial waste heat, including a plurality of heat exchangers, preferably two. When there are two heat exchangers, the recovery and reuse system of the present application includes:

[0056] Upper heat exchanger 1, which is provided with an upper connection port 11 for the access of industrial waste heat fluid, an upper discharge port 12 for discharging industrial waste heat fluid, and an upper inlet 13 and an upper outlet 14 for the inflow and outflow of water.

[0057] Lower heat exchanger 2, which is provided with a lower connection port 21 for connecting to the upper discharge port 12 and a lower discharge port 22 for discharging industrial waste heat fluid; on both sides of one end of the lower heat exchanger 2, there are respectively a lower inlet 23 and a lower outlet 24. The lower outlet 24 is connected to the upper inlet 13, so that the cold water to be heat-exchanged enters the lower heat exchanger 2 through the lower inlet 23, then enters the upper heat exchanger 1 through the lower outlet 24 and the upper inlet 13, and finally flows out of the upper heat exchanger 1 from the upper outlet 14. In this process, the cold water is preheated first and then heated. The upper connection port 11 of this application can be arranged on the side of the upper heat exchanger 1 close to the upper outlet 14 or on the side of the upper heat exchanger 1 far from the upper outlet 14; when the upper connection port 11 is arranged on the side of the upper heat exchanger 1 close to the upper outlet 14, the upper discharge port 12 is arranged on the side of the upper heat exchanger 1 far from the upper inlet 13; when the upper connection port 11 is arranged on the side of the upper heat exchanger 1 far from the upper outlet 14, the upper discharge port 12 is arranged on the side of the upper heat exchanger 1 close to the upper inlet 13.

[0058] Mounting frame 3, the upper heat exchanger 1 and the lower heat exchanger 2 are fixedly arranged on the mounting frame 3 from top to bottom. The mounting frame 3 adopts a multi-stage mounting structure to mount and fix the upper heat exchanger 1 and the lower heat exchanger 2, so as to facilitate disassembly and maintenance.

[0059] Heat exchange tube group 4, which is respectively arranged in the upper heat exchanger 1 and the lower heat exchanger 2; in the upper heat exchanger 1 and the lower heat exchanger 2, there is a baffle plate group 5 for slowing down the flow of industrial waste heat fluid. The baffle plate group 5 includes an upper baffle plate and a lower baffle plate. The upper baffle plate includes an upper baffle plate one 51 and an upper baffle plate two 52, and the lower baffle plate includes a lower baffle plate one 53 and a lower baffle plate two 54. The upper baffle plate one 51 and the lower baffle plate two 54 are slidably arranged on the heat exchange tube group 4, and the upper baffle plate two 52 and the lower baffle plate one 53 are fixedly arranged on the heat exchange tube group 4.

[0060] See Figure 8 , the plate group adjusting mechanism 6 of this application is arranged in the upper heat exchanger 1 and / or the lower heat exchanger 2, and includes an upper screw 61 and a lower screw 62. The upper screw 61 is threadedly connected to the upper baffle plate one 51, and the lower screw 62 is threadedly connected to the lower baffle plate two 54. On the upper screw 61, there are spaced external threads one 611 and external threads two 612 with opposite thread directions, and on the lower screw 62, there is an external thread three 621. By rotating the upper screw 61 and the lower screw 62, the two adjacent upper baffle plates one 51 move relative to each other, and the lower baffle plate two 54 moves to engage with the upper baffle plate two 52 to adjust the distance between the baffle plate groups 5, thereby effectively reducing the flow rate and residence time of the industrial waste heat fluid in the heat exchanger and effectively improving the heat exchange efficiency of the heat exchange tube group 4.

[0061] Specifically, the water to be heated enters the heat exchange tube group 4 in the lower heat exchanger 2 through the lower inlet 23, then enters the heat exchange tube group 4 in the upper heat exchanger 1 from the upper inlet 13 through the lower outlet 24, and finally flows out from the upper outlet 14 in the upper heat exchanger 1 to realize the flow heat exchange of the heating water from bottom to top. The industrial waste heat fluid enters through the upper connection port 11, then flows in the upper heat exchanger 1 to the upper discharge port 12 at the end, enters the end of the lower heat exchanger 2 from the lower connection port 21, then flows in the lower heat exchanger 2, and finally discharges from the lower discharge port 22 of the lower heat exchanger 2.

[0062] See Figure 6 and Figure 15 , the upper baffle and the lower baffle of the present application are vertically crossed along the axial direction of the heat exchanger, so that the spaces between the upper baffles and between the lower baffles are separated from each other, so that the industrial waste heat fluid flows in an "S" shape in the upper heat exchanger 1 and the lower heat exchanger 2, so that the industrial waste heat fluid can flow slowly in the heat exchanger for heat exchange. The setting of the double heat exchangers in the present application can realize the secondary recovery and utilization of waste heat, and effectively improve the heat recovery efficiency of the industrial waste heat fluid. Further, the upper connection port 11 of the present application is connected to the pipeline of the industrial waste heat fluid through a pipeline, and a filter is provided in the pipeline for filtering the industrial waste heat fluid.

[0063] See Figure 8 , the plate group adjusting mechanism 6 of the present application further includes a driving motor 63. The upper screw 61 rotates and is threadedly connected to the first upper baffle 51 in the upper heat exchanger 1 and / or the lower heat exchanger 2, and the lower screw 62 rotates and is threadedly connected to the second lower baffle 54 in the upper heat exchanger 1 and / or the lower heat exchanger 2; the driving motor 63 is arranged on one side of the outer end of the upper heat exchanger 1 and / or the lower heat exchanger 2 through a fixing frame, and the output end of the driving motor 63 is meshed and driven with the transmission gears 64 at the ends of the upper screw 61 and the lower screw 62 through gears, so that the driving motor 63 can drive the upper screw 61 and the lower screw 62 to rotate synchronously and in the same direction. It should be noted that waterproof and anti-corrosion bearings are provided at the rotational connection points of the upper screw 61 and the lower screw 62 with the upper heat exchanger 1 and the lower heat exchanger 2, so that the upper screw 61 and the lower screw 62 can rotate stably in the heat exchanger.

[0064] Further, the vertical length of the second lower baffle 54 moving to be vertically joined with the second upper baffle 52 is equal to the vertical length of the first lower baffle 53, and the vertical length of the first upper baffle 51 is equal to or less than the vertical length of the first lower baffle 53. Preferably, the vertical length of the first upper baffle 51 is equal to the vertical length of the first lower baffle 53.

[0065] Embodiment 2:

[0066] As another embodiment of the present application, as Figure 12 and Figure 14As shown, on both sides of each fixed upper baffle plate two 52 of the present application, two upper baffle plates one 51 are slidably arranged, and on one side of each fixed lower baffle plate one 53, one lower baffle plate two 54 is slidably arranged. The pitch of the external thread three 621 is greater than the pitches of the external thread one 611 and the external thread two 612. When the upper baffle plate one 51 moves to the horizontal middle parts of the upper baffle plate two 52 and the lower baffle plate one 53 under the rotation of the upper screw rod 61, the lower baffle plate two 54 moves to be joined with the upper baffle plate two 52 under the rotation of the lower screw rod 62, so that the lower baffle plate two 54 and the upper baffle plate two 52 are joined to form a baffle structure having the same shape and structure as the lower baffle plate one 53. Further, the pitch of the external thread three 621 is twice the pitch of the external thread one 611 and twice the pitch of the external thread two 612. With such an arrangement, not only can the distance between the baffle plates be adjusted, but also the upper baffle plate one 51 and the lower baffle plate two 54 can slide on the heat exchange tube group 4 through the upper screw rod 61 and the lower screw rod 62 to clean the outer wall of the entire heat exchange tube group 4. When the upper baffle plate one 51 moves to the lower baffle plate one 53, the lower baffle plate two 54 moves to the next lower baffle plate one 53.

[0067] See Figure 3 and Figure 4 , the heat exchange tube group 4 of the present application includes a heat exchange tube group one 41 and a heat exchange tube group two 42. Both the heat exchange tube group one 41 and the heat exchange tube group two 42 include multiple U-shaped heat exchange tubes 400. The upper heat exchanger 1 and the lower heat exchanger 2 both include a heat exchange cavity (not shown) and a water inlet and outlet cavity 15. The U-shaped heat exchange tubes 400 are located in the heat exchange cavity; the water inlet and outlet cavity 15 is connected to the heat exchange cavity and is isolated by a sealing plate. The ends of the upper screw rod 61 and the lower screw rod 62 are rotatably connected to the sealing plate. One ends of the multiple U-shaped heat exchange tubes 400 are communicated with the water inlet and outlet cavity 15, and the other ends of the multiple U-shaped heat exchange tubes 400 are sleeved with a support plate 10; the support plate 10 is fixedly connected to the water inlet and outlet cavity 15 through a connecting rod 101. A partition plate 16 is arranged in the water inlet and outlet cavity 15. The partition plate 16 is used to divide the water inlet and outlet cavity 15 into a water inlet cavity 151 and a water outlet cavity 152. One end of the U-shaped heat exchange tube 400 is connected to one side of the sealing plate and is communicated with the water inlet cavity 151, and the other end of the U-shaped heat exchange tube 400 is connected to the other side of the sealing plate and is communicated with the water outlet cavity 152, so that the water to be heated enters the U-shaped heat exchange tube 400 through the U-shaped heat exchange tube 400 inlet of the water inlet cavity 151 and then enters the water outlet cavity 152 from the outlet of the U-shaped heat exchange tube 400. By arranging the heat exchange tube group one 41 and the heat exchange tube group two 42, and relying on the rotation of the upper screw rod 61 and the lower screw rod 62 between the heat exchange tube group one 41 and the heat exchange tube group two 42 to drive the upper baffle plate one 51 and the lower baffle plate two 54 to move on the heat exchange tube group one 41 and the heat exchange tube group two 42, the distance between the baffle plate groups 5 can be adjusted, and the outer walls of the heat exchange tube group one 41 and the heat exchange tube group two 42 can also be cleaned.

[0068] The heat exchange tube group one 41 and the heat exchange tube group two 42 of the present application are of multi-layer structure; further, refer to Figure 5 , the heat exchange tube group 4 of the present application can also adopt a double-layer structure, and the number of layers of the heat exchange tube group 4 can be selected according to the usage scenario.

[0069] Further, the upper heat exchanger 1 and the lower heat exchanger 2 of the present application are provided with flushing connection ports for flushing the inside thereof, so as to be connected to an external cleaning water pipe to clean the inside of the upper heat exchanger 1 and the lower heat exchanger 2. In order to improve the cleaning efficiency, ultrasonic vibrators can be arranged in the upper heat exchanger 1 and the lower heat exchanger 2 to ultrasonically vibrate and remove the scale inside.

[0070] Embodiment Three:

[0071] As another embodiment of the present application, as Figure 8 and Figure 14 shown, a main scraper 7 is also slidably arranged on the heat exchange tube group 4 of the present application. The main scraper 7 is slidably arranged on the heat exchange tube group one 41 and the heat exchange tube group two 42. A reciprocating thread groove one 613 is also arranged on the upper screw rod 61 and / or the lower screw rod 62. The main scraper 7 is threadedly connected to the upper screw rod 61 and / or the lower screw rod 62 through the reciprocating thread groove one 613, so that when the upper screw rod 61 and the lower screw rod 62 rotate, the main scraper 7 can be driven to reciprocate on the heat exchange tube group one 41 and the heat exchange tube group two 42 to clean the outer walls of the heat exchange tube group one 41 and the heat exchange tube group two 42.

[0072] Refer to Figure 14 , a secondary scraper 8 is also slidably arranged on the heat exchange tube group 4 of the present application. The secondary scraper 8 is located at the end of the heat exchange tube group 4 and on one side of the support plate 10. A reciprocating thread groove two 614 is also arranged on the upper screw rod 61 and / or the lower screw rod 62. The secondary scraper 8 is threadedly connected to the upper screw rod 61 and / or the lower screw rod 62 through the reciprocating thread groove two 614; multiple strip-shaped holes are vertically arranged on the secondary scraper 8 to facilitate the movement at the end of the heat exchange tube group 4 to clean the arc section at the end of the heat exchange tube group 4, so as to prevent the scale in the gap at the end of the heat exchange tube group 4 from hindering the contact between the industrial waste heat fluid and the heat exchange tube group 4.

[0073] Refer to Figure 14, the pitches of the reciprocating thread groove one 613 and the reciprocating thread groove two 614 of the present application are greater than the pitches of the external thread one 611 and the external thread two 612, so that when the upper baffle plate one 51 moves to the horizontal middle parts of the upper baffle plate two 52 and the lower baffle plate one 53 under the rotation of the upper screw rod 61, the main scraper 7 and the auxiliary scraper 8 reciprocate and return to fit with the support plate 10 on the upper screw rod 61 and / or the lower screw rod 62, so as to realize that when the upper screw rod 61 and the lower screw rod 62 rotate, they can drive the main scraper 7 and the auxiliary scraper 8 to perform linear reciprocating motion to clean the arc-shaped ends of the heat exchange tube group 4. At the same time, through the above settings, it can effectively prevent the main scraper 7 and the auxiliary scraper 8 from quickly returning when the upper baffle plate and the lower baffle plate are adjusted, so as to reduce the flow interference of the industrial waste heat fluid in the heat exchanger.

[0074] By providing the main scraper 7, the auxiliary scraper 8, the upper baffle plate one 51 and the lower baffle plate two 54, the present application realizes the cleaning of the outer wall of the entire heat exchange tube group 4, and can effectively reduce the problem that the heat exchange efficiency of the industrial waste heat fluid on the heat exchange tube group 4 is affected due to scaling. At the same time, during the movement of the main scraper 7, the auxiliary scraper 8, the upper baffle plate one 51 and the lower baffle plate two 54, the inner wall of the heat exchange cavity can also be cleaned, effectively improving the cleaning efficiency inside the upper heat exchanger 1 and the lower heat exchanger 2.

[0075] Embodiment Four:

[0076] As another embodiment of the present application, as Figure 2 shown, the present application further includes a temperature monitor 9, which is arranged on the upper discharge port 12 of the upper heat exchanger 1 and / or the lower discharge port 22 of the lower heat exchanger 2 to monitor the temperature of the industrial waste heat fluid flowing from the upper discharge port 12 into the lower heat exchanger 2 and the temperature of the industrial waste heat fluid discharged from the lower heat exchanger 2. Further, the temperature monitor 9 is electrically connected to the controller connected to the driving motor 63, so as to control the driving motor 63 through the controller. Under the monitoring of the temperature monitor 9, the driving motor 63 can drive the upper screw rod 61 and the lower screw rod 62 to work according to the discharge temperature of the industrial waste heat fluid, so as to adjust the distance between the upper baffle plate one 51 and the lower baffle plate one 53, and rely on the engagement of the lower baffle plate two 54 with the upper baffle plate two 52 to form an "S"-shaped channel with the upper baffle plate one 51 on both sides.

[0077] Embodiment Five:

[0078] As another embodiment of the present application, as Figure 1 shown, the mounting frame 3 of the present application includes a frame body one, a frame body two and a frame body three. The frame body one is used to support the whole system, the frame body two is used to fix the lower heat exchanger 2 and support the upper heat exchanger 1, and the frame body three is used to fix the upper heat exchanger 1. There are two groups of mounting frames 3. The frame body one, the frame body two and the frame body three of each group of mounting frames 3 are fixedly connected by detachable bolts to support the upper heat exchanger 1 and the lower heat exchanger 2, so as to facilitate daily disassembly, repair and maintenance.

[0079] Working principle of this application: The industrial waste heat fluid flows into the heat exchange cavity 151 of the upper heat exchanger 1 through the upper connection port 11, then flows in the heat exchange cavity 151 to the upper discharge port 12 at the end of the upper heat exchanger 1, and enters the inner end of the heat exchange cavity 151 of the lower heat exchanger 2 from the lower connection port 21, and flows in the heat exchange cavity 151, and finally discharges from the lower discharge port 22 of the lower heat exchanger 2; The water to be heated enters the heat exchange tube group 4 in the lower heat exchanger 2 through the lower inlet 23 of the water inlet and outlet cavity 152, and then enters the heat exchange tube group 4 in the upper heat exchanger 1 from the upper inlet 13 through the lower outlet 24 of the water inlet and outlet cavity 152, and finally flows out from the upper outlet 14 of the water inlet and outlet cavity 152 in the upper heat exchanger 1 to realize the flow heat exchange of the heated water from bottom to top. In this process, the high temperature of the industrial waste heat fluid first contacts the water in the preheated heat exchange tube group 4 in the upper heat exchanger 1, and then the remaining temperature preheats the cold water in the lower heat exchanger 2, so as to recover the heat of the industrial waste heat fluid by means of secondary recovery. The heated hot water can be used for industrial production, life, heating, etc.

[0080] The temperature monitor 9 arranged on the upper discharge port 12 of the upper heat exchanger 1 and / or the lower discharge port 22 of the lower heat exchanger 2 is used to monitor the heat discharged by the industrial waste heat fluid of the upper heat exchanger 1 and / or the lower heat exchanger 2. When the heat discharged by the industrial waste heat fluid exceeds the set standard, the driving motor 63 works to drive the upper screw 61 and the lower screw 62 to rotate simultaneously, so that the upper baffle plate 51 moves to the horizontal middle part of the upper baffle plate 52 and the lower baffle plate 53 under the rotation of the upper screw 61, and the lower baffle plate 54 moves to vertically engage with the upper baffle plate 52 under the rotation of the lower screw 62, so that the lower baffle plate 54 and the upper baffle plate 52 are engaged to form a baffle structure with the same shape and structure as the lower baffle plate 53, so as to realize the re-splitting of multiple "S"-shaped channels, and make each original "S"-shaped channel become two "S"-shaped channels with the same length, so as to slow down the flow rate of the industrial waste heat fluid, so that it can stay in the heat exchanger for a longer time. This application doubles the upper baffle plate and the lower baffle plate by setting the plate group adjusting mechanism 6 on the basis of the existing multi-stage "S"-shaped channel.

[0081] The above is only the preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention by using the above technical content without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments according to the technical solution of the present invention without departing from the content of the technical solution of the present invention all belong to the protection scope of this technical solution.

Claims

1. A recycling and reuse system for industrial waste heat, characterized in that , including: An upper heat exchanger, which is provided with an upper connection port for accessing industrial waste heat fluid, an upper discharge port for discharging industrial waste heat fluid, an upper inlet and an upper outlet for water inflow and outflow; A lower heat exchanger, which is provided with a lower connection port for connecting with the upper discharge port and a lower discharge port for discharging industrial waste heat fluid; one end of the lower heat exchanger is provided with a lower inlet and a lower outlet, and the lower outlet is connected to the upper inlet; A mounting rack, on which the upper heat exchanger and the lower heat exchanger are fixedly arranged; A heat exchange tube group, which is respectively arranged in the upper heat exchanger and the lower heat exchanger; a baffle plate group for slowing down the flow of industrial waste heat fluid is arranged in the upper heat exchanger and the lower heat exchanger; A plate group adjusting mechanism, which is arranged in the upper heat exchanger and / or the lower heat exchanger and is threadedly connected to the baffle plate group to drive the baffle plate group to move on the heat exchange tube group to adjust the distance between the baffle plate groups; The baffle plate group includes an upper baffle plate and a lower baffle plate. The upper baffle plate includes an upper baffle plate one and an upper baffle plate two. The lower baffle plate includes a lower baffle plate one and a lower baffle plate two. The upper baffle plate one and the lower baffle plate two are slidably arranged on the heat exchange tube group. The upper baffle plate two and the lower baffle plate one are fixedly arranged on the heat exchange tube group; The plate group adjusting mechanism includes an upper screw rod, a lower screw rod and a driving motor. The upper screw rod rotates in the upper heat exchanger and / or the lower heat exchanger and is threadedly connected to the upper baffle plate one. The lower screw rod rotates in the upper heat exchanger and / or the lower heat exchanger and is threadedly connected to the lower baffle plate two; opposite-threaded external threads one and two are arranged at intervals on the upper screw rod, and an external thread three is arranged on the lower screw rod; by rotating the upper screw rod and the lower screw rod, the adjacent upper baffle plate ones perform relative movement, and the lower baffle plate two moves to be joined with the upper baffle plate two.

2. The recovery and reuse system for industrial waste heat according to claim 1, wherein The upper baffle plate and the lower baffle plate are vertically and crosswise arranged along the axial direction of the heat exchanger, so that the spaces between the upper baffle plates and the spaces between the lower baffle plates are separated from each other, so that the industrial waste heat fluid flows in an "S" shape in the upper heat exchanger and the lower heat exchanger.

3. The recycling and reuse system for industrial waste heat according to claim 2, wherein The driving motor is arranged on one side of the outer end of the upper heat exchanger and / or the lower heat exchanger, and the output end of the driving motor is meshed and driven with the transmission gears at the ends of the upper screw rod and the lower screw rod through gears.

4. The recycling and reuse system for industrial waste heat according to claim 3, wherein Two upper baffle plate ones are slidably arranged on both sides of each fixed upper baffle plate two, and one lower baffle plate two is slidably arranged on one side of each fixed lower baffle plate one.

5. The recycling and reuse system for industrial waste heat according to claim 4, wherein, The pitch of the external thread three is greater than the pitches of the external thread one and the external thread two, so that when the upper baffle plate one moves to the horizontal middle of the upper baffle plate two and the lower baffle plate one under the rotation of the upper screw rod, the lower baffle plate two moves to be joined with the upper baffle plate two under the rotation of the lower screw rod, so that the lower baffle plate two and the upper baffle plate two are joined to form a baffle structure with the same shape and structure as the lower baffle plate one.

6. The recycling and reuse system for industrial waste heat according to claim 3, characterized in that, The heat exchange tube group includes a first heat exchange tube group and a second heat exchange tube group. Both the first heat exchange tube group and the second heat exchange tube group include multiple U-shaped heat exchange tubes. Both the upper heat exchanger and the lower heat exchanger include a heat exchange chamber and a water inlet / outlet chamber. The water inlet / outlet chamber is connected to the heat exchange chamber. One ends of the multiple U-shaped heat exchange tubes communicate with the water inlet / outlet chamber, and the other ends of the multiple U-shaped heat exchange tubes are sleeved with support plates; the support plates are fixedly connected to the water inlet / outlet chamber through connecting rods.

7. The recycling and reuse system for industrial waste heat according to claim 6, characterized in that, A main scraper is also slidably arranged on the heat exchange tube group. The main scraper is slidably arranged on the first heat exchange tube group and the second heat exchange tube group. A first reciprocating thread groove is also arranged on the upper screw rod and / or the lower screw rod. The main scraper is threadedly connected to the upper screw rod and / or the lower screw rod through the first reciprocating thread groove.

8. The recycling and reuse system for industrial waste heat according to claim 7, characterized in that, A secondary scraper is also slidably arranged on the heat exchange tube group. The secondary scraper is located at the end of the heat exchange tube group and on one side of the support plate. A second reciprocating thread groove is also arranged on the upper screw rod and / or the lower screw rod. The secondary scraper is threadedly connected to the upper screw rod and / or the lower screw rod through the second reciprocating thread groove.

9. The recycling and reuse system for industrial waste heat according to claim 8, characterized in that, The pitch of the first reciprocating thread groove and the second reciprocating thread groove is greater than the pitch of the first external thread and the second external thread, so that when the upper baffle plate 1 moves to the horizontal middle of the upper baffle plate 2 and the lower baffle plate 1 under the rotation of the upper screw rod, the main scraper and the secondary scraper reciprocate and return to fit with the support plate on the upper screw rod and / or the lower screw rod.

10. The recycling and reuse system for industrial waste heat according to claim 3, characterized in that, It also includes a temperature monitor, which is arranged on the upper discharge port of the upper heat exchanger and / or the lower discharge port of the lower heat exchanger to monitor the temperature of the industrial waste heat fluid flowing from the upper discharge port into the lower heat exchanger.

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