Recycling system for industrial waste heat

Abstract

The invention discloses a recycling system for industrial waste heat, which relates to the technical field of heat exchange and comprises an upper heat exchanger, a lower heat exchanger, a mounting frame, a heat exchange tube group, a flow baffle group and a plate group adjusting mechanism, the upper heat exchanger and the lower heat exchanger are arranged on the mounting frame, the industrial waste heat fluid flows from the upper heat exchanger to the lower heat exchanger, and water flow flows from the lower heat exchanger to the upper heat exchanger, so that two-stage heat exchange treatment of the industrial waste heat fluid is achieved, and a low-temperature waste heat section of the industrial waste heat fluid can preheat newly-fed cold water firstly; and the high-temperature section of the industrial waste heat fluid exchanges heat with the preheated water, so that the continuous heat exchange efficiency of the heat exchanger is effectively improved. Meanwhile, a plate set adjusting mechanism is arranged in the heat exchanger to drive an upper flow baffle and a lower flow baffle to move on a heat exchange pipe set so as to adjust the distance between flow baffle sets, the flow speed of industrial waste heat fluid in the heat exchanger can be adjusted, and the continuous heat exchange efficiency of the heat exchanger can be further improved.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchange, and in particular to a system for recovering and reusing industrial waste heat. Background Art

[0002] Industrial waste heat includes industrial waste gas and industrial waste water. Industrial waste gas refers to toxic and harmful gases discharged during production and life, especially chemical plants, steel plants and pharmaceutical plants, as well as coking plants and refineries. Industrial waste gas contains a lot of heat. Industrial waste water refers to the waste liquid generated in the industrial production process. The waste liquid contains industrial production materials, intermediate products, by-products and pollutants generated in the production process with high heat that are lost with the waste water. Therefore, the waste water generated in industry usually has a high heat. Industrial waste gas and industrial waste water are collectively referred to as industrial waste heat fluid.

[0003] At present, heat recovery of industrial waste heat fluid generally adopts heat exchange method. For example, a new type of shell and tube heat exchanger equipment with publication number CN222086785U includes a head, a tank body, a sealing splint, a partition, a pipeline, a baffle, and a support rod; the head is connected to the opening side of the tank body, and the other side of the tank body is a sealing setting; a first inlet is set at the top of the head, a first outlet is set at the bottom of the head, and the partition is set inside the head, the partition is arranged along the horizontal direction of the head, the first inlet is located at the upper part of the partition, the first outlet is located at the lower part of the partition, and the partition is used to separate the first inlet and the first outlet; a second inlet is set at the upper part of the tank body, and a second outlet is set at the lower part of the tank body; one end of the pipeline is connected to the upper part of the partition The other end of the pipeline is connected to the lower part of the partition, the pipeline extends along the length direction of the tank body and is in an arc shape at the end of the tank body, the liquid delivered through the first inlet of the head is delivered through the pipeline and flows out from the first outlet; a plurality of baffles are arranged at intervals in the tank body, the baffles are arranged in the vertical direction, the support rods are extended along the length direction of the tank body, the support rods are connected to the baffles, the 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, and the other end of the support rod is fixedly arranged on the end surface of the sealing clamp; the sealing clamp is clamped at the connection between the head and the tank body, and the end of the pipeline is passed through the sealing clamp.

[0004] The heat exchanger device disclosed above improves the stability of the end face connection by means of a sealing clamp fixedly connected between the head and the tank body, thereby preventing the liquid flow inside the tank body from flowing into the interior of the head. In order to improve the installation stability of the baffle inside the tank body and prevent the internal baffle from being impacted when the flow rate of the cold fluid is too large or the pressure is too high, a support rod is arranged inside the tank body, and the support rod is used to be fixedly connected to the baffle. The upper support rod and the lower support rod located inside the tank body are respectively connected in parallel and connected at the ends by connecting rods, thereby ensuring the connection stability of the support rod, and the ends of the support rods are fixedly connected to the sealing clamp, so that the sealing assembly of the inlet and outlet of the pipe pass can be achieved through the sealing clamp, and the assembly stability of the baffle inside the tank body is improved by the support rod.

[0005] However, the above-mentioned heat exchanger equipment adopts a single-shell structure. During the continuous use of the heat exchanger equipment, the temperature inside and on the inner wall will reach a certain thermal equilibrium, so that the waste heat fluid passing through it will be discharged with part of the heat, and the waste heat cannot be recycled for a second time; therefore, the present application proposes a double-shell system for the recovery and reuse of industrial waste heat. Summary of the invention

[0006] The purpose of the present invention is to address the deficiencies in the above-mentioned technology and to propose a system for recovering and reusing industrial waste heat, aiming to solve the problem that the above-mentioned heat exchanger equipment adopts a single-shell structure and cannot recycle the waste heat.

[0007] The present invention provides a system for recycling industrial waste heat, comprising: An upper heat exchanger, on which an upper connection port for the industrial waste heat fluid to be connected and an upper discharge port for the industrial waste heat fluid to be discharged, as well as an upper inlet and an upper outlet for the water to flow in and out are arranged; The lower heat exchanger 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; a lower inlet and a lower outlet are provided at one end of the lower heat exchanger, and the lower outlet is connected with the upper inlet; A mounting frame, on which the upper heat exchanger and the lower heat exchanger are fixedly mounted; Heat exchange tube groups are respectively arranged in the upper heat exchanger and the lower heat exchanger; the upper heat exchanger and the lower heat exchanger are provided with baffle groups for slowing down the flow of industrial waste heat fluid, the baffle groups include upper baffles and lower baffles, the upper baffles include upper baffles 1 and upper baffles 2, the lower baffles include lower baffles 1 and lower baffles 2, the upper baffles 1 and the lower baffles 2 are slidably arranged on the heat exchange tube group, and the upper baffles 2 and the lower baffles 1 are fixedly arranged on the heat exchange tube group; The plate group adjustment mechanism is arranged in the upper heat exchanger and / or the lower heat exchanger, and includes an upper screw and a lower screw. The upper screw is threadedly connected to the upper baffle plate 1, and the lower screw is threadedly connected to the lower baffle plate 2. The upper screw is provided with an external thread 1 and an external thread 2 with opposite thread rotation directions at intervals, and the lower screw is provided with an external thread 3. The upper screw and the lower screw are rotated to make two adjacent upper baffle plates 1 move relative to each other, and the lower baffle plate 2 moves to engage with the upper baffle plate 2 to adjust the spacing of the baffle plate group.

[0008] Preferably, the upper baffle plates and the lower baffle plates are vertically cross-arranged along the axis of the heat exchanger to separate the upper baffle plates and the lower baffle plates from each other, thereby allowing the industrial waste heat fluid to flow in an "S" shape in the upper heat exchanger and the lower heat exchanger.

[0009] The plate group adjustment mechanism also includes a drive motor, an upper screw is rotatably located in the upper heat exchanger and / or the lower heat exchanger and is threadedly connected to the upper baffle plate, and a lower screw is rotatably located in the upper heat exchanger and / or the lower heat exchanger and is threadedly connected to the lower baffle plate; the drive 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 drive motor is meshed and driven with the transmission gears at the ends of the upper screw and the lower screw through gears.

[0010] Preferably, two upper baffle plates 1 are slidably disposed on both sides of each fixed upper baffle plate 2, and one lower baffle plate 2 is slidably disposed on one side of each fixed lower baffle plate 1. The pitch of the external thread 3 is greater than the pitch of the external thread 1 and the external thread 2, 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 lower baffle plate 2 moves to engage with the upper baffle plate 2 under the rotation of the lower screw rod, so that the lower baffle plate 2 and the upper baffle plate 2 are engaged to form a baffle structure with the same shape and structure as the lower baffle plate 1.

[0011] Preferably, the heat exchange tube group includes heat exchange tube group 1 and heat exchange tube group 2, each of which includes a plurality of U-shaped heat exchange tubes, the upper heat exchanger and the lower heat exchanger each include a heat exchange chamber and an inlet and outlet water chamber, the inlet and outlet water chamber is connected to the heat exchange chamber, one end of the plurality of U-shaped heat exchange tubes is connected to the inlet and outlet water chamber, and the other end of the plurality of U-shaped heat exchange tubes is sleeved with a support plate; the support plate is fixedly connected to the inlet and outlet water chamber through a connecting rod.

[0012] Preferably, a main scraper is also slidably arranged on the heat exchange tube group, and the main scraper is slidably arranged on heat exchange tube group one and heat exchange tube group two. A reciprocating thread groove one is also provided on the upper screw and / or the lower screw, and the main scraper is threadably connected to the upper screw and / or the lower screw through the reciprocating thread groove one.

[0013] An auxiliary scraper is also slidably arranged on the heat exchange tube group, which is located at the end of the heat exchange tube group and on one side of the support plate. Two reciprocating thread grooves are also arranged on the upper screw and / or the lower screw, and the auxiliary scraper is threadably connected to the upper screw and / or the lower screw through the two reciprocating thread grooves.

[0014] The pitch of the reciprocating thread groove 1 and the reciprocating thread groove 2 is greater than the pitch of the external thread 1 and the external thread 2, 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 auxiliary scraper reciprocate on the upper screw rod and / or the lower screw rod to return to the position until they are in contact with the support plate.

[0015] Preferably, 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 to the lower heat exchanger.

[0016] Compared with the prior art, it has the following beneficial effects: 1. The present application realizes secondary heat exchange treatment of industrial waste heat fluid by arranging an upper heat exchanger and a lower heat exchanger on a mounting frame, and allowing the industrial waste heat fluid to flow from the upper heat exchanger to the lower heat exchanger, and the water to flow from the lower heat exchanger to the upper heat exchanger, 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 can heat the preheated water, effectively improving the continuous heat exchange efficiency of the heat exchanger.

[0017] 2. By setting a plate group adjustment mechanism in the heat exchanger to drive the upper baffle plate and the lower baffle plate to move on the heat exchange tube group respectively, the distance between the baffle plate groups is adjusted, thereby adjusting the number and width of the "S" flow channels in the heat exchanger, thereby adjusting the flow rate of the industrial waste heat fluid in the heat exchanger, and further improving the continuous heat exchange efficiency of the heat exchanger.

[0018] 3. The present application arranges a main scraper, an auxiliary scraper, and movable upper baffle plate 1 and lower baffle plate 2, and relies on the upper screw and the lower screw on the plate group adjustment mechanism to clean the outer wall of the heat exchange tube group, thereby effectively reducing the problem of reduced heat exchange efficiency caused by scaling on the heat exchange tube group. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a structural schematic diagram of a system for recycling and reusing industrial waste heat according to the present invention; Figure 2 This is a structural schematic diagram of a system for recycling and reusing industrial waste heat according to the present invention; Figure 3 It is a structural schematic diagram of the heat exchange tube group of the present invention; Figure 4 It is a structural schematic diagram of the heat exchange tube group of the present invention; Figure 5 Schematic diagram of another embodiment of the heat exchange tube group of the present invention Figure 6 It is an internal schematic diagram of the heat exchanger of the present invention; Figure 7 for Figure 6 A magnified schematic diagram of part A in FIG. Figure 8 for Figure 6 A magnified schematic diagram of part B in FIG. Fig. 9 It is an internal schematic diagram of the heat exchanger of the present invention; Fig.10 for Fig. 9 The enlarged schematic diagram of the C part in FIG. Fig.11 It is a schematic diagram of the baffle plate group and the plate group adjustment mechanism of the present invention; Fig.12 for Fig.11 An enlarged schematic diagram of the D portion in FIG. Fig.13 It is a schematic diagram of the baffle plate group and the plate group adjustment mechanism of the present invention; Fig.14 for Fig.13 The enlarged schematic diagram of part E in FIG. Fig.15 This is a schematic diagram of the baffle assembly of the present invention before adjustment; Fig.16 It is a schematic diagram of the baffle assembly after adjustment of the present invention; Fig.17 for Fig.16 Enlarged schematic diagram of part F in FIG.

[0021] In the figure, 1-upper heat exchanger; 11-upper connection port; 12-upper discharge port; 13-upper inlet; 14-upper outlet; 15-inlet and outlet water chamber; 151-water inlet chamber; 152-water outlet chamber; 16-partition; 2-lower heat exchanger; 21-lower connection port; 22-lower discharge port; 23-lower inlet; 24-lower outlet; 3-Mounting frame; 4-heat exchange tube group; 41-heat exchange tube group 1; 42-heat exchange tube group 2; 400-U-shaped heat exchange tube 5- baffle assembly; 51-upper baffle 1; 52-upper baffle 2; 53-lower baffle 1; 54-lower baffle 2; 6-plate group adjustment mechanism; 61-upper screw; 62-lower screw; 63-driving motor; 64-transmission gear; 611-external thread one; 612-external thread two; 613-reciprocating thread groove one; 614-reciprocating thread groove two; 621-external thread three; 7- Main scraper; 8- auxiliary scraper; 9- Temperature monitor; 10-support plate; 101-connecting rod. DETAILED DESCRIPTION

[0022] In order to make it easier to understand the structure of the present invention and the functional features and advantages that can be achieved, the preferred embodiments of the present invention are described in detail with reference to the drawings as follows: Embodiment 1: like Figures 1 to 14 As shown, the present invention provides a system for recycling and reusing industrial waste heat, including several heat exchangers, preferably two. When there are two heat exchangers, the recycling and reusing system of the present application includes: The upper heat exchanger 1 is provided with an upper connection port 11 for the connection of industrial waste heat fluid and an upper discharge port 12 for the discharge of industrial waste heat fluid, as well as an upper inlet 13 and an upper outlet 14 for the inflow and outflow of water.

[0023] The lower heat exchanger 2 is provided with a lower connecting port 21 for connecting with the upper discharge port 12, and a lower discharge port 22 for discharging industrial waste heat fluid; a lower inlet 23 and a lower outlet 24 are respectively provided on both sides of one end of the lower heat exchanger 2, and the lower outlet 24 is connected with the upper inlet 13, so that the cold water to be heat exchanged enters the lower heat exchanger 2 through the lower inlet 23, and then enters the upper heat exchanger 1 through the upper inlet 13 from the lower outlet 24, and finally flows out of the upper heat exchanger 1 from the upper outlet 14. In this process, the cold water is first preheated and then heated. The upper connection port 11 of the present 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 away 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 away from the upper inlet 13; when the upper connection port 11 is arranged on the side of the upper heat exchanger 1 away 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.

[0024] The mounting frame 3, the upper heat exchanger 1 and the lower heat exchanger 2 are fixed on the mounting frame 3 from top to bottom, and 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 for easy disassembly and maintenance.

[0025] The heat exchange tube group 4 is respectively arranged in the upper heat exchanger 1 and the lower heat exchanger 2; the upper heat exchanger 1 and the lower heat exchanger 2 are provided with a baffle group 5 for slowing down the flow of industrial waste heat fluid, the baffle group 5 includes an upper baffle and a lower baffle, the upper baffle includes an upper baffle 1 51 and an upper baffle 2 52, the lower baffle includes a lower baffle 1 53 and a lower baffle 2 54, the upper baffle 1 51 and the lower baffle 2 54 are slidably arranged on the heat exchange tube group 4, the upper baffle 2 52 and the lower baffle 1 53 are fixedly arranged on the heat exchange tube group 4.

[0026] See also Figure 8 The plate group adjustment mechanism 6 of the present 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 1 51, and the lower screw 62 is threadedly connected to the lower baffle plate 2 54. The upper screw 61 is provided with an external thread 1 611 and an external thread 2 612 with opposite thread rotation directions at intervals, and the lower screw 62 is provided with an external thread 3 621. The upper screw 61 and the lower screw 62 rotate to make two adjacent upper baffle plates 1 51 move relative to each other, and the lower baffle plate 2 54 moves to engage with the upper baffle plate 2 52 to adjust the spacing between the baffle plate groups 5, thereby effectively reducing the flow velocity 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.

[0027] 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 through the upper inlet 13 through the lower outlet 24, and finally flows out from the upper outlet 14 in the upper heat exchanger 1, so as to realize the flow heat exchange of the heated water from bottom to top. The industrial waste heat fluid flows in through the upper connection port 11, then flows in the upper heat exchanger 1 to the upper discharge port 12 at the end, and 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 the lower heat exchanger 2 from the lower discharge port 22.

[0028] See also Figure 6 and Fig.15 The upper baffle plate and the lower baffle plate of the present application are vertically cross-arranged along the axial direction of the heat exchanger to separate the upper baffle plates and the lower baffle plates 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 dual heat exchanger of 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. Furthermore, 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.

[0029] See also Figure 8The plate group adjustment mechanism 6 of the present application also includes a drive motor 63, an upper screw 61 is rotatably located in the upper heat exchanger 1 and / or the lower heat exchanger 2 and is threadedly connected to the upper baffle plate 1 51, and a lower screw 62 is rotatably located in the upper heat exchanger 1 and / or the lower heat exchanger 2 and is threadedly connected to the lower baffle plate 2 54; the drive motor 63 is fixedly mounted on one side of the outer end of the upper heat exchanger 1 and / or the lower heat exchanger 2, and the output end of the drive motor 63 is meshed with the transmission gear 64 at the end of the upper screw 61 and the lower screw 62 through a gear, so that the drive motor 63 can drive the upper screw 61 and the lower screw 62 to rotate synchronously in the same direction. It should be noted that the upper screw 61 and the lower screw 62 of the present application are provided with waterproof and anti-corrosion bearings at the rotational connection with the upper heat exchanger 1 and the lower heat exchanger 2, so that the upper screw 61 and the lower screw 62 can stably rotate in the heat exchanger.

[0030] Furthermore, the lower baffle plate 2 54 of the present application moves to a vertical length that is vertically coupled with the upper baffle plate 2 52 and is equal to the vertical length of the lower baffle plate 1 53, and the vertical length of the upper baffle plate 1 51 is equal to or less than the vertical length of the lower baffle plate 1 53. Preferably, the vertical length of the upper baffle plate 1 51 is equal to the vertical length of the lower baffle plate 1 53.

[0031] Embodiment 2: As another embodiment of the present application, Fig.12 and Fig.14 As shown, two upper baffle plates 1 51 are slidably arranged on both sides of each fixed upper baffle plate 2 52 of the present application, and one lower baffle plate 2 54 is slidably arranged on one side of each fixed lower baffle plate 1 53. The pitch of the external thread 3 621 is greater than the pitch of the external thread 1 611 and the external thread 2 612, so that when the upper baffle plate 1 51 moves to the horizontal middle of the upper baffle plate 2 52 and the lower baffle plate 1 53 under the rotation of the upper screw 61, the lower baffle plate 2 54 moves to engage with the upper baffle plate 2 52 under the rotation of the lower screw 62, so that the lower baffle plate 2 54 and the upper baffle plate 2 52 are engaged to form a baffle structure with the same shape and structure as the lower baffle plate 1 53. Further, the pitch of the external thread 3 621 is twice the pitch of the external thread 1 611, and twice the pitch of the external thread 2 612. With this arrangement, not only can the spacing of the baffles be adjusted, but also the upper baffle plate 1 51 and the lower baffle plate 2 54 can be slid on the heat exchange tube group 4 by the upper screw 61 and the lower screw 62 to clean the outer wall of the entire heat exchange tube group 4. When the upper baffle plate 1 51 moves to the lower baffle plate 1 53, the lower baffle plate 2 54 moves to the next lower baffle plate 1 53.

[0032] See also Figure 3 and Figure 4The heat exchange tube group 4 of the present application includes a heat exchange tube group 1 41 and a heat exchange tube group 2 42. The heat exchange tube group 1 41 and the heat exchange tube group 2 42 both 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 an inlet and outlet water cavity 15. The U-shaped heat exchange tube 400 is located in the heat exchange cavity; the inlet and outlet water cavity 15 is connected to the heat exchange cavity and isolated by a sealing plate. The ends of the upper screw 61 and the lower screw 62 are rotatably connected to the sealing plate. One end of the multiple U-shaped heat exchange tubes 400 is connected to the inlet and outlet water cavity 15, and the other end of the multiple U-shaped heat exchange tubes 400 is sleeved with a support plate 10; the support plate 10 is fixedly connected to the inlet and outlet water cavity 15 through a connecting rod 101. A partition 16 is provided in the water inlet and outlet chamber 15, and the partition 16 is used to separate the water inlet and outlet chamber 15 into a water inlet chamber 151 and a water outlet chamber 152. One end of the U-shaped heat exchange tube 400 is connected to one side of the sealing plate and communicates with the water inlet chamber 151, and the other end of the U-shaped heat exchange tube 400 is connected to the other side of the sealing plate and communicates with the water outlet chamber 152, so that the water to be heated enters the U-shaped heat exchange tube 400 through the inlet of the U-shaped heat exchange tube 400 of the water inlet chamber 151, and then enters the water outlet chamber 152 from the outlet of the U-shaped heat exchange tube 400. The present application sets a heat exchange tube group 1 41 and a heat exchange tube group 2 42, and relies on the upper screw 61 and the lower screw 62 to rotate between the heat exchange tube group 1 41 and the heat exchange tube group 2 42 to drive the upper baffle plate 1 51 and the lower baffle plate 2 54 to move on the heat exchange tube group 1 41 and the heat exchange tube group 2 42, so as to adjust the distance between the baffle plate groups 5 and clean the outer walls of the heat exchange tube group 1 41 and the heat exchange tube group 2 42.

[0033] The heat exchange tube group 1 41 and the heat exchange tube group 2 42 of the present application are multi-layer structures; further, see 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.

[0034] Furthermore, 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 facilitate connection with 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, an ultrasonic vibrator can be provided in the upper heat exchanger 1 and the lower heat exchanger 2 to remove the scale therein by ultrasonic vibration.

[0035] Embodiment three: As another embodiment of the present application, Figure 8 and Fig.14As shown, the heat exchange tube group 4 of the present application is also slidably provided with a main scraper 7, and the main scraper 7 is slidably provided on the heat exchange tube group 1 41 and the heat exchange tube group 2 42. The upper screw 61 and / or the lower screw 62 are also provided with a reciprocating thread groove 1 613. The main scraper 7 is threadedly connected with the upper screw 61 and / or the lower screw 62 through the reciprocating thread groove 1 613, so that when the upper screw 61 and the lower screw 62 rotate, the main scraper 7 can be driven to reciprocate on the heat exchange tube group 1 41 and the heat exchange tube group 2 42 to clean the outer walls of the heat exchange tube group 1 41 and the heat exchange tube group 2 42.

[0036] See also Fig.14 The heat exchange tube group 4 of the present application is also slidably provided with an auxiliary scraper 8, which is located at the end of the heat exchange tube group 4 and on one side of the support plate 10. The upper screw 61 and / or the lower screw 62 are also provided with a reciprocating thread groove 614, and the auxiliary scraper 8 is threadedly connected with the upper screw 61 and / or the lower screw 62 through the reciprocating thread groove 614; a plurality of strip holes are vertically arranged on the auxiliary scraper 8, so as to move 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 scaling 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.

[0037] See also Fig.14 The pitch of the reciprocating thread groove 1 613 and the reciprocating thread groove 2 614 of the present application is greater than the pitch of the external thread 1 611 and the external thread 2 612, so that when the upper baffle plate 1 51 moves to the horizontal middle of the upper baffle plate 2 52 and the lower baffle plate 1 53 under the rotation of the upper screw rod 61, the main scraper 7 and the auxiliary scraper 8 reciprocate on the upper screw rod 61 and / or the lower screw rod 62 to fit with the support plate 10, so that when the upper screw rod 61 and the lower screw rod 62 rotate, the main scraper 7 and the auxiliary scraper 8 can be driven to perform linear reciprocating motion to clean the arc-shaped end of the heat exchange tube group 4. At the same time, through the above-mentioned setting, it can effectively prevent the main scraper 7 and the auxiliary scraper 8 from returning quickly 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.

[0038] The present application realizes cleaning of the outer wall of the entire heat exchange tube group 4 by setting the main scraper 7, the auxiliary scraper 8, the upper baffle plate 1 51 and the lower baffle plate 2 54, which can effectively reduce the problem of the industrial waste heat fluid affecting the heat exchange efficiency due to scaling on the heat exchange tube group 4. At the same time, the main scraper 7, the auxiliary scraper 8, the upper baffle plate 1 51 and the lower baffle plate 2 54 can also clean the inner wall of the heat exchange cavity during the movement, effectively improving the cleaning efficiency inside the upper heat exchanger 1 and the lower heat exchanger 2.

[0039] Embodiment 4: As another embodiment of the present application, Figure 2As 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 a controller connected to a drive motor 63, so as to control the drive motor 63 through the controller, so that the drive motor 63 can drive the upper screw 61 and the lower screw 62 to work according to the discharge temperature of the industrial waste heat fluid under the monitoring of the temperature monitor 9, thereby adjusting the spacing between the upper baffle plate 1 51 and the lower baffle plate 1 53, and relying on the engagement of the lower baffle plate 2 54 with the upper baffle plate 2 52 to form an "S"-shaped channel with the upper baffle plates 1 51 on both sides.

[0040] Embodiment five: As another embodiment of the present application, Figure 1 As shown, the mounting frame 3 of the present application includes frame body 1, frame body 2 and frame body 3, frame body 1 is used to support the entire system, frame body 2 is used to fix the lower heat exchanger 2 and support the upper heat exchanger 1, and frame body 3 is used to fix the upper heat exchanger 1. The mounting frame 3 is divided into two groups, and frame body 1, frame body 2 and frame body 3 of each group of mounting frames 3 are connected by detachable bolts to fix and support the upper heat exchanger 1 and the lower heat exchanger 2, so as to facilitate daily disassembly, repair and maintenance.

[0041] The working principle of the present application is as follows: the industrial waste heat fluid flows into the heat exchange chamber 151 of the upper heat exchanger 1 through the upper connecting port 11, then flows in the heat exchange chamber 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 chamber 151 of the lower heat exchanger 2 from the lower connecting port 21, flows in the heat exchange chamber 151, and is finally discharged 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 inlet and outlet water chamber 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 inlet and outlet water chamber 152, and finally flows out from the upper outlet 14 of the inlet and outlet water chamber 152 in the upper heat exchanger 1, so as 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 heat exchange tube group 4 preheated in the upper heat exchanger 1, and then the residual temperature preheats the cold water in the lower heat exchanger 2, so that the industrial waste heat fluid is recovered and utilized through secondary recovery. The heated hot water can be used for industrial production, life, heating, etc.

[0042] The temperature monitor 9 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 discharge heat of the industrial waste heat fluid of the upper heat exchanger 1 and / or the lower heat exchanger 2. When the discharge heat of 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 1 51 moves to the horizontal middle of the upper baffle plate 2 52 and the lower baffle plate 1 53 under the rotation of the upper screw 61, and the lower baffle plate 2 54 moves to vertically engage with the upper baffle plate 2 52 under the rotation of the lower screw 62, so that the lower baffle plate 2 54 and the upper baffle plate 2 52 are engaged to form a baffle structure with the same shape and structure as the lower baffle plate 1 53, so as to realize the re-division of multiple "S"-shaped channels, so that each original "S"-shaped channel becomes two "S"-shaped channels of equal 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. The present application provides a plate group adjustment mechanism 6 to double the upper baffle plate and the lower baffle plate on the basis of the existing multi-stage "S"-shaped channel.

[0043] The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any technician familiar with 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 of equivalent changes. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments based on the technology of the present invention without departing from the content of the technical solution of the present invention belong to the protection scope of the present technical solution.

Claims

1. A system for recycling industrial waste heat, characterized in that ,include: An upper heat exchanger (1) is provided with an upper connection port (11) for receiving industrial waste heat fluid and an upper discharge port (12) for discharging the industrial waste heat fluid, as well as an upper inlet (13) and an upper outlet (14) for water to flow in and out; A lower heat exchanger (2) 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; a lower inlet (23) and a lower outlet (24) are provided at one end of the lower heat exchanger (2), and the lower outlet (24) is connected to the upper inlet (13); A mounting frame (3), the upper heat exchanger (1) and the lower heat exchanger (2) being fixedly mounted on the mounting frame (3); The heat exchange tube groups (4) are respectively arranged in the upper heat exchanger (1) and the lower heat exchanger (2); the upper heat exchanger (1) and the lower heat exchanger (2) are provided with baffle groups (5) for slowing down the flow of industrial waste heat fluid; A plate group adjustment mechanism (6) is disposed in the upper heat exchanger (1) and / or the lower heat exchanger (2), and is threadedly connected to the baffle group (5) to drive the baffle group (5) to move on the heat exchange tube group (4) to adjust the spacing of the baffle group (5).

2. The system for recycling and reusing industrial waste heat according to claim 1, characterized in that: The baffle group (5) comprises an upper baffle and a lower baffle, the upper baffle comprising an upper baffle 1 (51) and an upper baffle 2 (52), the lower baffle comprising a lower baffle 1 (53) and a lower baffle 2 (54), the upper baffle 1 (51) and the lower baffle 2 (54) being slidably arranged on the heat exchange tube group (4), the upper baffle 2 (52) and the lower baffle 1 (53) being fixedly arranged on the heat exchange tube group (4), the upper baffle and the lower baffle being arranged vertically and crosswise along the axial direction of the heat exchanger so that the upper baffles and the lower baffles are separated from each other, thereby allowing the industrial waste heat fluid to flow in the upper heat exchanger (1) and the lower heat exchanger (2) in an "S" shape.

3. The system for recycling and reusing industrial waste heat according to claim 2, characterized in that: The plate group adjustment mechanism (6) comprises an upper screw (61), a lower screw (62) and a drive motor (63); the upper screw (61) is rotatably located in the upper heat exchanger (1) and / or the lower heat exchanger (2) and is threadedly connected to the upper baffle plate 1 (51); the lower screw (62) is rotatably located in the upper heat exchanger (1) and / or the lower heat exchanger (2) and is threadedly connected to the lower baffle plate 2 (54); the upper screw (61) is provided with an outer thread 1 (611) and an outer thread 2 (612) with opposite thread rotation directions at intervals; the lower screw (62) is provided with an outer thread 1 (611) and an outer thread 2 (612) with opposite thread rotation directions at intervals; The rod (62) is provided with an external thread three (621); the upper screw rod (61) and the lower screw rod (62) rotate to cause two adjacent upper baffle plates (51) to move relative to each other, and the lower baffle plate (54) moves to engage with the upper baffle plate (52); the drive motor (63) is arranged on one side of the outer end of the upper heat exchanger (1) and / or the lower heat exchanger (2), and the output end of the drive motor (63) is meshed with the transmission gear (64) at the end of the upper screw rod (61) and the lower screw rod (62) through a gear for transmission.

4. The system for recycling and reusing industrial waste heat according to claim 3, characterized in that: Two upper baffle plates (51) are slidably arranged on both sides of each fixed upper baffle plate (52), and one lower baffle plate (54) is slidably arranged on one side of each fixed lower baffle plate (53).

5. The system for recycling and reusing industrial waste heat according to claim 4, characterized in that: The pitch of the external thread three (621) is greater than the pitch 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 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 engage 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 engaged to form a baffle structure with the same shape and structure as the lower baffle plate one (53).

6. The system for recycling and reusing industrial waste heat according to claim 3, characterized in that: The heat exchange tube group (4) comprises a heat exchange tube group 1 (41) and a heat exchange tube group 2 (42), each of the heat exchange tube group 1 (41) and the heat exchange tube group 2 (42) comprising a plurality of U-shaped heat exchange tubes (400), the upper heat exchanger (1) and the lower heat exchanger (2) comprising a heat exchange cavity and an inlet and outlet water cavity (15), the inlet and outlet water cavity (15) being connected to the heat exchange cavity, one end of the plurality of U-shaped heat exchange tubes (400) being in communication with the inlet and outlet water cavity (15), and the other end of the plurality of U-shaped heat exchange tubes (400) being sleeved with a support plate (10); the support plate (10) being fixedly connected to the inlet and outlet water cavity (15) via a connecting rod (101).

7. The system for recycling and reusing industrial waste heat according to claim 6, characterized in that: A main scraper (7) is also slidably provided on the heat exchange tube group (4), and the main scraper (7) is slidably provided on the heat exchange tube group 1 (41) and the heat exchange tube group 2 (42). A reciprocating thread groove 1 (613) is also provided on the upper screw rod (61) and / or the lower screw rod (62), and the main scraper (7) is threadedly connected to the upper screw rod (61) and / or the lower screw rod (62) via the reciprocating thread groove 1 (613).

8. The system for recycling and reusing industrial waste heat according to claim 7, characterized in that: The heat exchange tube group (4) is also slidably provided with an auxiliary scraper (8), the auxiliary scraper (8) being located at the end of the heat exchange tube group (4) and at one side of the support plate (10), and the upper screw rod (61) and / or the lower screw rod (62) are also provided with a second reciprocating thread groove (614), and the auxiliary scraper (8) is threadedly connected to the upper screw rod (61) and / or the lower screw rod (62) via the second reciprocating thread groove (614).

9. The system for recycling and reusing industrial waste heat according to claim 8, characterized in that: The pitch of the reciprocating thread groove 1 (613) and the reciprocating thread groove 2 (614) is greater than the pitch of the external thread 1 (611) and the external thread 2 (612), so that when the upper baffle plate 1 (51) moves to the horizontal middle of the upper baffle plate 2 (52) and the lower baffle plate 1 (53) under the rotation of the upper screw rod (61), the main scraper (7) and the auxiliary scraper (8) reciprocate on the upper screw rod (61) and / or the lower screw rod (62) to return to the position in contact with the support plate (10).

10. The system for recycling and reusing industrial waste heat according to claim 3, characterized in that: It also 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).

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