Waste heat recovery device

Abstract

The utility model discloses a waste heat recovery device which comprises a base and is characterized in that a heat exchange tank is fixedly connected with the base through a connecting rod, and a spiral heat exchange coil pipe is arranged in the heat exchange tank; the upper end of the heat exchange coil fixedly communicates with one end of a high-temperature water outlet, and the lower end of the heat exchange coil fixedly communicates with one end of a low-temperature water inlet; the high-temperature water outlet fixedly penetrates through the upper end of the arc-shaped wall surface of the heat exchange tank, and the low-temperature water inlet fixedly penetrates through the lower end of the arc-shaped wall surface of the heat exchange tank; a heat exchange coil cleaning assembly is arranged in the heat exchange tank and used for cleaning water and rust on the surface of the heat exchange coil. The utility model relates to the technical field of heat treatment, in particular to a waste heat recovery device. According to the utility model, the water rust on the surface of the heat exchange coil pipe is cleaned through the arranged heat exchange coil pipe cleaning assembly, so that the heat exchange effect of the heat exchange coil pipe is ensured, and the service life of the heat exchange coil pipe is prolonged.

Description

Technical Field

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

[0002] In the process of industrial production, a large amount of waste heat is often generated, such as flue gas, steam, hot water, etc. If this waste heat cannot be effectively recycled, it will cause energy waste and environmental pollution. Therefore, it is of great significance and value to develop a device that can recycle waste heat and improve its quality.

[0003] At present, there are some waste heat recovery devices, such as compression heat pumps, absorption heat pumps, absorption heat exchangers, etc. These devices can be driven by electricity or thermal energy to raise low-temperature waste heat to high temperature and then recycle it. However, these devices also have some shortcomings, such as:

[0004] The efficiency of compression heat pumps is limited by the choice of refrigerant and the circulation method, and they consume more electricity and are more expensive.

[0005] The efficiency of absorption heat pumps is limited by the choice of working fluid and the circulation method, and requires a higher driving temperature, so the scope of application is narrow.

[0006] The efficiency of the absorption heat exchanger is limited by the choice of working fluid and the structure of the heat exchanger, and it consumes more heat energy and has lower efficiency.

[0007] Moreover, these heat pumps lack the cleaning of water rust on the heat exchange coils during operation;

[0008] Therefore, in order to solve the above problems, the present invention proposes a novel waste heat recovery device capable of cleaning water scale from a heat exchange coil. Summary of the invention

[0009] The utility model provides a waste heat recovery device. The utility model can clean water rust on the surface of the heat exchange coil by means of a heat exchange coil cleaning component, thereby ensuring the heat exchange effect of the heat exchange coil and extending the service life of the heat exchange coil.

[0010] A waste heat recovery device comprises a base, characterized in that: a heat exchange tank is fixedly connected to the base through a connecting rod, a heat exchange coil is arranged in the heat exchange tank, and the heat exchange coil is spiral;

[0011] The upper end of the heat exchange coil is fixedly connected to one end of the high-temperature water outlet, and the lower end of the heat exchange coil is fixedly connected to one end of the low-temperature water inlet;

[0012] The high-temperature water outlet is fixed through the upper end of the arc-shaped wall surface of the heat exchange tank, and the low-temperature water inlet is fixed through the lower end of the arc-shaped wall surface of the heat exchange tank;

[0013] A heat exchange coil cleaning assembly is provided in the heat exchange tank to clean the water rust on the surface of the heat exchange coil;

[0014] The heat exchange coil cleaning assembly includes a movable ring, bristles, a connecting shaft, a universal joint, a sleeve and a cross rod. The upper end bearing of the cross rod is connected to the upper end center of the heat exchange tank. The cross rod is slidably connected to the sleeve. The arc wall of the sleeve is fixedly connected to the outer shell of the universal joint. The ball of the universal joint is fixedly connected to the outer wall of the movable ring through the connecting shaft. The movable ring is wrapped around the heat exchange coil. A group of bristles are fixed on the inner wall of the movable ring, and the bristles contact the outer wall of the heat exchange coil.

[0015] As a further limitation of the present technical solution, the cross-shaped rod is connected to a driving assembly for driving the rotation of the cross-shaped rod.

[0016] As a further limitation of the present technical solution, the driving assembly includes a motor, an output shaft of the motor is fixedly connected to the lower end of the cross rod, and the motor is fixed on the lower side of the heat exchange tank.

[0017] As a further limitation of the technical solution, the lower part of one side of the arc-shaped wall of the heat exchange tank is open, and the opening is threadedly connected to a sealing plate by bolts, and a sealing ring is provided on the inner edge of the sealing plate to improve the sealing performance.

[0018] As a further limitation of the present technical solution, the upper end of the arc-shaped wall surface of the heat exchange tank is fixedly connected to the steam inlet, and the lower end of the arc-shaped wall surface of the heat exchange tank is fixedly connected to the condensed water outlet.

[0019] As a further limitation of the present technical solution, solenoid valve flow meters are respectively provided on the high-temperature water outlet and the low-temperature water inlet.

[0020] As a further limitation of the present technical solution, a flow sensor and a temperature sensor are provided on the steam inlet, the flow sensor and the temperature sensor are connected to a controller, and the controller controls the solenoid valve flow meter.

[0021] Compared with the prior art, the advantages and positive effects of the utility model are:

[0022] This device uses a heat exchange coil as a heat exchange element, which has the characteristics of compact structure, high heat exchange efficiency, large heat transfer coefficient, and good anti-fouling performance. It can effectively utilize the waste heat in the heat exchange tank to heat the low-temperature water entering the water inlet to the high-temperature water at the outlet of the water outlet, thereby improving the quality of thermal energy.

[0023] The device is provided with a heat exchange coil cleaning component, which is used to clean the water rust on the surface of the heat exchange coil, ensure the heat exchange effect of the heat exchange coil, and extend the service life of the heat exchange coil. The cleaning component adopts structures such as a movable ring, bristles, a connecting shaft, a universal joint, a sleeve ring and a cross rod, which can realize all-round cleaning of the heat exchange coil, and is easy to operate and maintain.

[0024] The device is provided with a driving assembly for driving the rotation of the cross-shaped rod, thereby driving the moving ring to move along the spiral trajectory of the heat exchange coil to achieve cleaning of the heat exchange coil. The driving assembly uses a motor as a power source, which has the characteristics of stable operation, low noise, low energy consumption, etc., can save energy and reduce operating costs.

[0025] The device is provided with a sealing plate for sealing the opening at the lower part of one side of the arc-shaped wall of the heat exchange tank to prevent heat loss and air entry, thereby improving the sealing and safety of the system. A sealing ring is provided on the inner edge of the sealing plate to enhance the sealing effect and prevent water and air leakage.

[0026] The device is provided with a steam inlet pipe and a condensed water outlet pipe for connecting the heat exchange tank with an external waste heat source and a user side to realize the recovery and utilization of waste heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0028] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0029] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0030] Figure 3 The three-dimensional structure of the utility model is shown in FIG. Figure 3 ;

[0031] Figure 4 It is a three-dimensional cutaway schematic diagram of the utility model.

[0032] In the figure: 1-heat exchange tank, 2-condensate inlet, 3-low-temperature water inlet, 4-base, 41-connecting rod, 5-steam inlet, 6-high-temperature water outlet, 7-sealing plate, 71-bolt, 8-motor, 9-heat exchange coil, 10-cross rod, 11-ring, 12-brush, 13-moving ring, 14-connecting shaft, 15-universal joint. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-Figure 4 The utility model is further described with implementation modes.

[0034] The specific embodiments of the present utility model are:

[0035] Embodiment 1:

[0036] A waste heat recovery device comprises a base 4 and a heat exchange tank 1, wherein the base 4 is fixedly connected to the base 4 by a connecting rod 41, and a heat exchange coil 9 is arranged in the heat exchange tank 1, and the heat exchange coil 9 is spiral;

[0037] The upper end of the heat exchange coil 9 is fixedly connected to one end of the high-temperature water outlet 6, and the lower end of the heat exchange coil 9 is fixedly connected to one end of the low-temperature water inlet 3;

[0038] The high-temperature water outlet 6 is fixed through the upper end of the arc-shaped wall surface of the heat exchange tank 1, and the low-temperature water inlet 3 is fixed through the lower end of the arc-shaped wall surface of the heat exchange tank 1;

[0039] The heat exchange tank 1 is provided with a heat exchange coil cleaning assembly for cleaning water scale on the surface of the heat exchange coil 9;

[0040] The heat exchange coil cleaning assembly includes a movable ring 13, bristles 12, a connecting shaft 14, a universal joint 15, a sleeve 11 and a cross rod 10. The upper end bearing of the cross rod 10 is connected to the upper end center of the heat exchange tank 1. The cross rod 10 is slidably connected to the sleeve 11. The arcuate wall surface of the sleeve 11 is fixedly connected to the outer shell of the universal joint 15. The ball of the universal joint 15 is fixedly connected to the outer wall of the movable ring 13 through the connecting shaft 14. The movable ring 13 is encircled by the heat exchange coil 9. A group of bristles 12 are fixed on the inner wall of the movable ring 13, and the bristles 12 contact the outer wall of the heat exchange coil 9.

[0041] The collar 11 is provided with a cross-shaped slideway penetrating therethrough and cooperating with the cross-shaped rod 10 .

[0042] The cross-shaped rod 10 is connected to a driving assembly for driving the rotation of the cross-shaped rod 10 .

[0043] The driving assembly includes a motor 8, the output shaft of the motor 8 is fixedly connected to the lower end of the cross rod 10, and the motor 8 is fixed to the lower side of the heat exchange tank 1. When the motor 8 is started, the cross rod 10 rotates accordingly, thereby driving the sleeve ring 11 to slide along the inner wall of the heat exchange tank 1, thereby driving the rotation of the universal joint 15 and the connecting shaft 14, and finally driving the moving ring 13 to move along the spiral trajectory of the heat exchange coil 9 to achieve cleaning of the heat exchange coil 9. During the movement, the bristles 12 can effectively scrape off the water rust on the surface of the heat exchange coil 9, thereby ensuring the heat exchange effect of the heat exchange coil 9 and extending the service life of the heat exchange coil 9.

[0044] The upper end of the arc-shaped wall surface of the heat exchange tank 1 is fixedly connected to the steam inlet 5 , and the lower end of the arc-shaped wall surface of the heat exchange tank 1 is fixedly connected to the condensed water outlet 2 .

[0045] The high-temperature water outlet 6 and the low-temperature water inlet 3 are respectively provided with electromagnetic valve flow meters.

[0046] The steam inlet 5 is provided with a flow sensor and a temperature sensor, and the flow sensor and the temperature sensor are connected to a controller, and the controller controls the solenoid valve flow meter.

[0047] The high-temperature water outlet 6 and the low-temperature water inlet 3 are respectively provided with temperature sensors. The solenoid valve flowmeter and the temperature sensor are connected to a controller. The controller controls the solenoid valve flowmeter to control the flow of steam and condensed water to ensure the operating balance and efficiency of the system. The steam inlet 5 is also provided with a flow sensor and a temperature sensor to detect the flow and temperature of the steam and transmit the signal to the controller. The controller controls the switch of the solenoid valve flowmeter to realize intelligent control of the system.

[0048] The working method of this embodiment is as follows: when the system is started, the external waste heat source (such as flue gas, steam, hot water, etc.) enters the heat exchange tank 1 through the steam inlet 5, exchanges heat with the heat exchange coil 9, and transfers heat energy to the water in the heat exchange coil 9, so that the water temperature increases. At the same time, the low-temperature water entering the low-temperature water inlet 3 also exchanges heat through the heat exchange coil 9, absorbs heat energy, and increases the water temperature. After heat exchange, the temperature of the external waste heat source decreases, and part or all of it is condensed into water, which is discharged from the system through the condensed water outlet 2 to recover the condensed water. After heat exchange, the water temperature in the heat exchange coil 9 increases, and is discharged from the system through the high-temperature water outlet 6 to be supplied to users, thereby realizing the utilization of thermal energy.

[0049] During system operation, the controller controls the switch of the solenoid valve flowmeter according to the signals from the flow sensor and temperature sensor, adjusts the flow of steam and condensate, and ensures the balance and efficiency of system operation.

[0050] At the same time, the motor 8 is started regularly or on demand to drive the cross rod 10 to rotate. The cross rod 10 rotates the ring 11, and the ring 11 drives the universal joint 15 and the movable ring 13 to rotate. The movable ring 13 moves along the spiral trajectory of the heat exchange coil 9. During this process, the ball of the universal joint 15 rotates in the outer shell to clean the heat exchange coil 9, ensure the heat exchange effect of the heat exchange coil 9, and extend the service life of the heat exchange coil 9.

[0051] Embodiment 2:

[0052] Based on the waste heat recovery device provided in the first embodiment of the present application, the second embodiment of the present application provides another waste heat recovery device. The second embodiment is only a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0053] Specifically, the waste heat recovery device provided in the second embodiment of the present application is different in that it also includes the following features: the lower part of one side of the curved wall of the heat exchange tank 1 is open, and the opening is threadedly connected to the sealing plate 7 by bolts 71, and a sealing ring is provided at the inner edge of the sealing plate 7 to improve the sealing performance. The opening can facilitate the installation, disassembly and maintenance of the heat exchange coil 9 and the heat exchange coil cleaning assembly in the heat exchange tank 1, thereby improving the reliability and convenience of the system.

[0054] The principle of the utility model is as follows: by unscrewing the bolts 71, removing the sealing plate 7, and opening the opening, it is convenient to install, disassemble and maintain the heat exchange coil 9 and the heat exchange coil cleaning assembly in the heat exchange tank 1.

[0055] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A waste heat recovery device, comprising a base (4), characterized in that: A heat exchange tank (1) is fixedly connected to the base (4) via a connecting rod (41), a heat exchange coil (9) is arranged inside the heat exchange tank (1), and the heat exchange coil (9) is spiral-shaped; The upper end of the heat exchange coil (9) is fixedly connected to one end of the high-temperature water outlet (6), and the lower end of the heat exchange coil (9) is fixedly connected to one end of the low-temperature water inlet (3); The high-temperature water outlet (6) is fixedly passed through the upper end of the arc-shaped wall surface of the heat exchange tank (1), and the low-temperature water inlet (3) is fixedly passed through the lower end of the arc-shaped wall surface of the heat exchange tank (1); The heat exchange tank (1) is provided with a heat exchange coil cleaning component for cleaning water scale on the surface of the heat exchange coil (9); The heat exchange coil cleaning assembly comprises a movable ring (13), bristles (12), a connecting shaft (14), a universal joint (15), a sleeve ring (11) and a cross rod (10); the upper end bearing of the cross rod (10) is connected to the upper end center of the heat exchange tank (1); the cross rod (10) is slidably connected to the sleeve ring (11); the arcuate wall surface of the sleeve ring (11) is fixedly connected to the outer shell of the universal joint (15); the ball of the universal joint (15) is fixedly connected to the outer wall of the movable ring (13) through the connecting shaft (14); the movable ring (13) is sleeved around the heat exchange coil (9); a group of bristles (12) is fixed to the inner wall of the movable ring (13); the bristles (12) contact the outer wall of the heat exchange coil (9).

2. A waste heat recovery device according to claim 1, characterized in that: The cross-shaped rod (10) is connected to a driving assembly and is used to drive the cross-shaped rod (10) to rotate.

3. A waste heat recovery device according to claim 2, characterized in that: The driving assembly comprises a motor (8), the output shaft of the motor (8) being fixedly connected to the lower end of the cross-shaped rod (10), and the motor (8) being fixed on the lower side of the heat exchange tank (1).

4. A waste heat recovery device according to claim 1, characterized in that: The lower part of one side of the arc-shaped wall of the heat exchange tank (1) is open, and the opening is threadedly connected to a sealing plate (7) via a bolt (71), and a sealing ring is provided on the inner edge of the sealing plate (7) to improve the sealing performance.

5. The waste heat recovery device according to claim 1, characterized in that: The upper end of the arc-shaped wall surface of the heat exchange tank (1) is fixedly connected to a steam inlet (5), and the lower end of the arc-shaped wall surface of the heat exchange tank (1) is fixedly connected to a condensed water outlet (2).

6. A waste heat recovery device according to claim 5, characterized in that: The high temperature water outlet (6) Solenoid valve flow meters are respectively provided on the low-temperature water inlet (3).

7. A waste heat recovery device according to claim 6, characterized in that: The steam inlet (5) is provided with a flow sensor and a temperature sensor, the flow sensor and the temperature sensor are connected to a controller, and the controller controls the solenoid valve flow meter.

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