Waste heat recycling device

Abstract

The utility model relates to the technical field of waste heat recovery, in particular to a waste heat recycling device. According to the technical scheme, the device comprises a heat insulation cover, lead screw bodies, heat exchange pipes and a collecting groove, the heat exchange pipes distributed in a rectangular array are inserted into the heat insulation cover, the lead screw bodies are arranged on the two sides of the lower end of the inner wall of the heat insulation cover, sliding blocks are arranged on the outer walls of one sides of the lead screw bodies, and connecting plates are installed on the outer walls of the upper ends of the sliding blocks; a collecting groove is formed in the connecting plate, through holes distributed in a rectangular array are formed in the two sides of the inner wall of the collecting groove, and a connecting pipe is installed on one side of the lower end of the inner wall of the collecting groove in an inserted connection mode, by arranging a scraping plate, the collecting groove and a blow-off pipe, the effect of cleaning heat exchange pipes is achieved, impurities are collected in a centralized mode, and the impurities are prevented from scattering all around; the relative cleanliness of the outer wall of the heat exchange tube is guaranteed, the flue gas temperature transfer efficiency of the heat exchange tube is guaranteed, and heat loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, in particular to a waste heat recovery and utilization device. Background Art

[0002] During cement production, low- and medium-temperature exhaust gases from equipment like rotary kilns and coolers contain considerable heat energy. If left unused, this energy would be released directly into the atmosphere, causing energy waste and environmental thermal pollution. Therefore, cement production waste heat recovery technology has emerged. By recycling this waste heat for power generation or heating, it not only improves energy efficiency but also reduces environmental pollution.

[0003] Although the existing technology has many benefits during use, it still has the following problems: it lacks a cleaning structure for the heat exchange tubes, which causes impurities mixed in the high-temperature flue gas to adhere to the outer wall of the heat exchange tubes, affecting the heat exchange efficiency between the high-temperature flue gas and the medium inside the heat exchange tubes. Utility Model Content

[0004] The purpose of the present invention is to provide a waste heat recovery device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a waste heat recovery and utilization device, comprising a heat insulation cover, a screw body, a heat exchange tube and a collection tank, wherein the heat insulation cover is plugged and installed with heat exchange tubes distributed in a rectangular array, the lower end of the inner wall of the heat insulation cover is provided with a screw body on both sides, a slider is provided on the outer wall of one side of the screw body, a connecting plate is installed on the outer wall of the upper end of the slider, a collection tank is provided inside the connecting plate, through holes distributed in a rectangular array are provided on both sides of the inner wall of the collection tank, and a connecting tube is plugged and installed on one side of the lower end of the inner wall of the collection tank.

[0006] When using a waste heat recovery and utilization device in the present technical solution, the flue gas flows from right to left inside the heat insulation cover through the ventilation pipe, and the heat exchange medium is driven by an external power pump to flow inside the connecting pipe and the heat exchange pipe, thereby absorbing the temperature in the flue gas and achieving the purpose of heat recovery from the flue gas. The screw body drives the slider and the connecting plate to move horizontally, and the outer wall of the heat exchange pipe is scraped and cleaned by the scraper. The fallen impurities will fall into the collection tank, and due to the flow of the flue gas, the impurities are prevented from seeping out through the through hole. The external vacuum cleaner collects the impurities inside the collection tank through the drain pipe, extension pipe and connecting pipe.

[0007] Preferably, ventilation pipes are installed on both sides of the outer wall of the heat insulation cover, and the ventilation pipes are connected to the interior of the heat insulation cover. High-temperature flue gas flows inside the heat insulation cover through the ventilation pipes.

[0008] Preferably, connecting pipes are installed on the outer walls of both ends of the heat exchange tube, and the connecting pipes are located outside the heat insulation cover. The connecting pipes are connected to an external power pump, which drives the heat exchange medium to flow inside the heat exchange tube.

[0009] Preferably, the connecting plate is designed in a rectangular shape and is located inside the heat shield. The connecting plate can move horizontally inside the heat shield.

[0010] Preferably, the size of the through hole is larger than that of the heat exchange tube, and the heat exchange tube is located inside the through hole. The connecting plate moves outside the heat exchange tube through the through hole.

[0011] Preferably, a scraper is fixed on one side of the inner wall of the through hole, and the inner wall of the scraper contacts the outer wall of the heat exchange tube. The scraper scrapes and cleans the outer wall of the heat exchange tube to ensure the relative cleanliness of the outer wall of the heat exchange tube.

[0012] Preferably, a drainage pipe is installed on one side of the lower end of the inner wall of the heat insulation cover, an extension pipe is installed on the outer wall of the upper end of the drainage pipe, and the other end of the extension pipe is connected to the connecting pipe. The extension pipe can be extended to ensure the sealing and stability of the connection between the drainage pipe and the connecting pipe.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention achieves the effect of cleaning the heat exchange tube by arranging a scraper, a collection trough and a drain pipe. The flue gas flows from right to left inside the heat insulation cover through the ventilation pipe, and the heat exchange medium is driven by an external power pump to flow inside the connecting pipe and the heat exchange tube, thereby absorbing the temperature in the flue gas and achieving the purpose of heat recovery from the flue gas. The screw body drives the slider and the connecting plate to move horizontally, and the outer wall of the heat exchange tube is scraped and cleaned by the scraper. The fallen impurities will fall into the collection trough, and due to the flow of the flue gas, the impurities are prevented from seeping out through the through hole. The external vacuum cleaner collects the impurities inside the collection trough through the drain pipe, extension pipe and connecting pipe to prevent the impurities from scattering, thereby ensuring the relative cleanliness of the outer wall of the heat exchange tube, ensuring the efficiency of the heat exchange tube in transmitting the flue gas temperature, and reducing heat loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the appearance of the heat shield structure of the present utility model;

[0015] Figure 2 This is a schematic cross-sectional view of the heat shield structure of the present invention;

[0016] Figure 3 It is a partial enlarged schematic diagram of the connecting plate structure of the present invention;

[0017] Figure 4 It is an enlarged schematic diagram of the connecting pipe structure of the present invention.

[0018] In the figure: 1. heat shield; 11. connecting pipe; 12. ventilation pipe; 13. heat exchange pipe; 14. sewage pipe; 15. extension pipe; 2. screw body; 21. slider; 22. connecting plate; 23. collecting tank; 24. through hole; 25. scraper; 26. connecting pipe. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 4 , the utility model provides two embodiments:

[0021] Embodiment 1: A waste heat recovery and utilization device comprises a heat insulation cover 1, a screw body 2, a heat exchange tube 13 and a collection tank 23. The heat exchange tube 13 distributed in a rectangular array is plugged and installed inside the heat insulation cover 1. The screw body 2 is provided on both sides of the lower end of the inner wall of the heat insulation cover 1. A slider 21 is provided on the outer wall of one side of the screw body 2. A connecting plate 22 is installed on the outer wall of the upper end of the slider 21. A collection tank 23 is provided inside the connecting plate 22. Through holes 24 distributed in a rectangular array are provided on both sides of the inner wall of the collection tank 23. A connecting tube 26 is plugged and installed on one side of the lower end of the inner wall of the collection tank 23.

[0022] Ventilation pipes 12 are installed on both sides of the outer wall of the heat insulation cover 1, and the ventilation pipes 12 are connected to the interior of the heat insulation cover 1. High-temperature flue gas flows inside the heat insulation cover 1 through the ventilation pipes 12.

[0023] Connecting pipes 11 are installed on the outer walls of both ends of the heat exchange tube 13, and are located outside the heat shield 1. Connecting pipes 11 are connected to an external power pump, which drives the heat exchange medium to flow inside the heat exchange tube 13. Flue gas flows from right to left inside the heat shield 1 through the ventilation pipe 12. The heat exchange medium is driven by the external power pump to flow inside the connecting pipe 11 and the heat exchange tube 13, thereby absorbing the heat in the flue gas and achieving the purpose of heat recovery from the flue gas.

[0024] Embodiment 2: A waste heat recovery and utilization device comprises a heat insulation cover 1, a screw body 2, a heat exchange tube 13 and a collection tank 23. The heat insulation cover 1 is plugged and installed with heat exchange tubes 13 distributed in a rectangular array, and screw bodies 2 are provided on both sides of the lower end of the inner wall of the heat insulation cover 1. As is well known to those skilled in the art, the waste heat recovery device of the present invention also needs to provide a screw body 2 to enable it to work normally, and as is well known to those skilled in the art, the provision of the screw body 2 is commonplace, and it all belongs to conventional means or common knowledge, and will not be repeated here. Those skilled in the art can make any selection according to their needs or convenience. A slider 21 is provided on the outer wall of one side of the screw body 2, and a connecting plate 22 is installed on the outer wall of the upper end of the slider 21. A collection tank 23 is provided inside the connecting plate 22, and through holes 24 distributed in a rectangular array are provided on both sides of the inner wall of the collection tank 23. A connecting pipe 26 is plugged and installed on one side of the lower end of the inner wall of the collection tank 23.

[0025] Ventilation pipes 12 are installed on both sides of the outer wall of the heat insulation cover 1, and the ventilation pipes 12 are connected to the interior of the heat insulation cover 1. High-temperature flue gas flows inside the heat insulation cover 1 through the ventilation pipes 12.

[0026] The outer walls of both ends of the heat exchange tube 13 are plugged with connecting pipes 11, and the connecting pipes 11 are located outside the heat insulation cover 1. The connecting pipes 11 are connected to an external power pump, which drives the heat exchange medium to flow inside the heat exchange tube 13.

[0027] The connecting plate 22 is designed in a rectangular shape and is located inside the heat shield 1. The connecting plate 22 can move horizontally inside the heat shield 1.

[0028] The through hole 24 is larger than the heat exchange tube 13 , and the heat exchange tube 13 is located inside the through hole 24 . The connecting plate 22 moves outside the heat exchange tube 13 through the through hole 24 .

[0029] A scraper 25 is fixed to one side of the inner wall of the through hole 24, and the inner wall of the scraper 25 contacts the outer wall of the heat exchange tube 13. The scraper 25 scrapes and cleans the outer wall of the heat exchange tube 13 to ensure the relative cleanliness of the outer wall of the heat exchange tube 13.

[0030] A sewage pipe 14 is installed on one side of the lower end of the inner wall of the heat insulation cover 1 , and an extension pipe 15 is installed on the outer wall of the upper end of the sewage pipe 14 . The other end of the extension pipe 15 is connected to the connecting pipe 26 . The extension pipe 15 can be extended and retracted to ensure the sealing and stability of the connection between the drain pipe 14 and the connecting pipe 26. The flue gas flows from right to left inside the heat insulation cover 1 through the ventilation pipe 12, and the heat exchange medium is driven by the external power pump to flow inside the connecting pipe 11 and the heat exchange pipe 13, thereby absorbing the temperature in the flue gas and achieving the purpose of heat recovery from the flue gas. The screw body 2 drives the slider 21 and the connecting plate 22 to move horizontally, and the scraper 25 is used to scrape and clean the outer wall of the heat exchange pipe 13. The fallen impurities will fall into the collection tank 23, and due to the flow of flue gas, the impurities are prevented from seeping out through the through hole 24. The external vacuum cleaner collects the impurities inside the collection tank 23 through the drain pipe 14, the extension pipe 15 and the connecting pipe 26 to prevent the impurities from scattering, thereby ensuring the relative cleanliness of the outer wall of the heat exchange pipe 13, ensuring the efficiency of the heat exchange pipe 13 in transmitting the flue gas temperature, and reducing heat loss.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A waste heat recovery device, comprising a heat shield (1), a screw body (2), a heat exchange tube (13) and a collection tank (23), characterized in that: The heat shield (1) is internally plugged with heat exchange tubes (13) distributed in a rectangular array. The inner wall of the heat shield (1) is provided with a lead screw body (2) on both sides of the lower end. The outer wall of one side of the lead screw body (2) is provided with a slider (21). The outer wall of the upper end of the slider (21) is provided with a connecting plate (22). The connecting plate (22) is provided with a collecting groove (23) inside. The inner wall of the collecting groove (23) is provided with through holes (24) distributed in a rectangular array on both sides. The inner wall of the collecting groove (23) is plugged with a lead screw body (2) on one side of the lower end. The connecting pipe (26) is provided; the size of the through hole (24) is larger than the size of the heat exchange pipe (13), and the heat exchange pipe (13) is located inside the through hole (24); a scraper (25) is fixed on one side of the inner wall of the through hole (24), and the inner wall of the scraper (25) is in contact with the outer wall of the heat exchange pipe (13); a sewage pipe (14) is plugged and installed on one side of the lower end of the inner wall of the heat insulation cover (1); an extension pipe (15) is plugged and installed on the outer wall of the upper end of the sewage pipe (14); and the other end of the extension pipe (15) is connected to the connecting pipe (26).

2. The waste heat recovery device according to claim 1, characterized in that: Ventilation pipes (12) are plugged and installed on the outer walls of both sides of the heat insulation cover (1), and the ventilation pipes (12) are connected to the interior of the heat insulation cover (1).

3. The waste heat recovery device according to claim 1, characterized in that: Connecting pipes (11) are inserted and installed on the outer walls of both ends of the heat exchange tube (13), and the connecting pipes (11) are located outside the heat insulation cover (1).

4. The waste heat recovery device according to claim 1, characterized in that: The connecting plate (22) is designed in a rectangular shape, and the connecting plate (22) is located inside the heat insulation cover (1).

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