Waste heat recovery device

Abstract

The utility model provides a waste heat recovery device, belongs to the technical field of power equipment in the lithium battery industry, and solves the technical problem that waste heat in a lithium battery cathode coating section cannot be recovered. According to the technical scheme, a water outlet and a cold air outlet are formed below the two sides of a chilled water tank respectively; the high-temperature humid and hot air inlet and the cold air outlet penetrate through the interior of the chilled water tank through a connecting pipe. The waste heat recovery system has the advantages that the whole structure of the waste heat recovery system is simple, and the waste heat recovery efficiency of the whole device is greatly improved through the connecting pipeline in the chilled water tank and the heat conduction interface material on the side wall of the chilled water tank.

Description

Technical Field

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

[0002] In the negative electrode coating section of lithium batteries, the coating machine will discharge a large amount of hot and humid air (waste gas). If this hot and humid air is directly discharged to the outside, it will not only cause certain pollution to the surrounding environment, but also waste a lot of heat energy. If this part of the heat energy can be recycled, it can not only reduce the pollution of the environment in this section, but also save a lot of resources. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is that in the negative electrode coating section of the lithium battery, the coating machine will discharge a large amount of high-temperature, humid and hot air (waste gas). If the high-temperature, humid and hot air is directly discharged to the outdoors, it will not only cause certain pollution to the surrounding environment, but also waste a lot of heat energy. The utility model provides a waste heat recovery device, which makes full use of the large amount of waste heat generated in the negative electrode coating section of the lithium battery industry to recover heat.

[0004] To this end, the utility model provides a waste heat recovery device, comprising:

[0005] A chilled water tank, wherein a water inlet and a high-temperature, humid, hot air inlet are arranged on the top of the chilled water tank; a water drain port and a cold air outlet are arranged below both sides of the chilled water tank; the high-temperature, humid, hot air inlet and the cold air outlet are penetrated through the interior of the chilled water tank by a connecting pipe.

[0006] Optionally, the cold air outlet is located below the water inlet on the same side, the drain port is located below the high-temperature hot and humid air inlet on the same side, and the water inlet and the drain port are arranged on opposite sides.

[0007] Optionally, the connecting pipe is a spiral steel pipe to increase the heat exchange area of ​​the connecting pipe.

[0008] Optionally, a thermal interface material is evenly coated on the side wall of the connecting pipe.

[0009] Optionally, the thermal interface material is made of silica gel or a phase change metal sheet.

[0010] Optionally, a first temperature-sensing valve and a second temperature-sensing valve are respectively provided at the water outlet and the cold air outlet.

[0011] Optionally, the water outlet is located lower than the cold air outlet.

[0012] Optionally, the valve electronic control driving ends of the first temperature-sensing valve and the second temperature-sensing valve are connected to the control end of the controller of the control workshop.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. The waste heat recovery device provided by the utility model has a spiral steel pipe structure as the connecting pipe, which is in the form of spiral winding, replacing the previous internal folded pipe form, greatly increasing the heat exchange area, so that the high-temperature and humid air passing through the spiral steel pipe can more fully pass through the pipe wall to exchange heat with the chilled water in the chilled water tank, and the heat is fully absorbed, which greatly improves the efficiency of the equipment;

[0015] 2. The waste heat recovery device provided by the utility model, the spiral steel pipe in the chilled water tank and the heat-conducting interface material evenly coated on its side wall replace the previous embedded heat conductor form, so that the efficiency of the overall waste heat recovery device is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the structure of a waste heat recovery device provided in an embodiment of the utility model;

[0018] Description of reference numerals:

[0019] 1. Chilled water tank; 2. Water inlet; 3. Drain; 4. High-temperature hot and humid air inlet; 5. Cold air outlet; 6. Connecting pipe; 7. Thermal interface material; 8. First temperature sensing valve; 9. Second temperature sensing valve. DETAILED DESCRIPTION

[0020] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating positions or positional relationships are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operate in a specific position, and therefore cannot be understood as limiting the present invention;

[0022] In the description of the present utility model application, it should be noted that, unless otherwise clearly specified and limited, the terms "assembly", "setting", "connection", "clamping" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model application can be understood according to specific circumstances.

[0023] Example 1

[0024] Figure 1 This is a schematic diagram of the structure of the waste heat recovery device provided in this embodiment. Figure 1 As shown, the waste heat recovery system of the negative electrode coating section of a lithium battery includes a chilled water tank 1, and a water inlet 2 and a high-temperature, humid, hot air inlet 4 are arranged on the top of the chilled water tank 1; a water outlet 3 and a cold air outlet 5 are respectively arranged below the two sides of the chilled water tank; the high-temperature, humid, hot air inlet 4 and the cold air outlet 5 are penetrated through the interior of the chilled water tank 1 by a connecting pipe 6.

[0025] A heat-conducting medium, such as water, can be poured into and discharged from the chilled water tank 1 through the water inlet 2 and the water outlet 3. By passing high-temperature, humid and hot air (waste gas) into the chilled water tank 1 from the high-temperature, humid and hot air inlet 4 and out from the cold air outlet 5 after passing through the connecting pipe 6, the high-temperature, humid and hot air will exchange heat with the heat exchange medium in the chilled water tank 1 when passing through the connecting pipe 6. The cooling medium after heat exchange is discharged from the water outlet 3 and transported to the downstream where it is needed, and the waste gas is discharged from the cold air outlet 5. At the same time, the high-temperature, humid and hot air inlet 4 is arranged at the top of the chilled water tank 1, and the cold air outlet 5 is arranged at the side end of the chilled water tank 1. In this way, the position of the high-temperature, humid and hot air inlet 4 can be higher than the position of the cold air outlet 5, so that the high-temperature, humid and hot air can enter from a high place and exit from a low place, which is convenient for forming liquid water droplets. Under the push of their own gravity and steam, they only go downward in a consistent direction without forming a plunger.

[0026] In this embodiment, the cold air outlet 5 is located below the water inlet 2 on the same side, the drain port 3 is located below the high-temperature humid hot air inlet 4 on the same side, and the water inlet 2 and the drain port 3 are arranged on different sides.

[0027] The cold air outlet 5 is located below the same side as the water inlet 2, and the drain port 3 is located below the same side as the high-temperature, humid air inlet 4. The water inlet 2 and the drain port 3 are arranged on opposite sides. In this way, the cold air outlet 5 and the high-temperature, humid air inlet 4 are also on opposite sides of the chilled water tank 1. This increases the flow path of the high-temperature, humid air, increases the heat exchange time, and can increase the area of ​​the heat exchange region, thereby improving the heat exchange efficiency. At the same time, the water inlet 2 and the drain port 3 are arranged on opposite sides, which can also enable the cooling medium in the chilled water tank 1 to contact the connecting pipe 6 when flowing, thereby improving the heat exchange uniformity of the medium.

[0028] In this embodiment, the connecting pipe 6 is a spiral steel pipe.

[0029] The connecting pipe 6 adopts a spiral steel pipe structure and is in a spirally coiled form, which greatly increases the heat exchange area, so that the high-temperature humid hot air passing through the spiral steel pipe can more fully exchange heat with the cooling medium in the chilled water tank 1 passing through the outside of the pipe wall.

[0030] In this embodiment, the side wall of the connecting tube 6 is evenly coated with a thermal interface material 7 .

[0031] In this embodiment, the thermal interface material 7 is made of silica gel or phase change metal sheet.

[0032] The thermal conductive interface material 7 is made of silica gel or phase change metal sheet (pure indium sheet, tin, silver, copper), which needs to be evenly coated on the outside of the spiral steel pipe to reduce the thermal resistance of the spiral steel pipe and then improve the heat exchange efficiency.

[0033] In this embodiment, a first temperature-sensing valve 8 and a second temperature-sensing valve 9 are respectively provided at the water outlet 3 and the cold air outlet 5 .

[0034] The first temperature sensing valve 8 and the second temperature sensing valve 9 can control the opening and closing of the corresponding cold air outlet 5 and the water outlet 3 according to the set temperature.

[0035] In this embodiment, the water outlet 3 is located lower than the cold air outlet 5 .

[0036] In this way, the water in the chilled water tank 1 can be drained as much as possible.

[0037] In this embodiment, the valve electronic control driving ends of the first temperature-sensing valve 8 and the second temperature-sensing valve 9 are connected to the control end of the controller of the control workshop.

[0038] In this way, the valve can be controlled by the controller.

[0039] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A waste heat recovery device, characterized in that: include: A chilled water tank (1), wherein a water inlet (2) and a high-temperature, humid, hot air inlet (4) are arranged at the top of the chilled water tank (1); a water outlet (3) and a cold air outlet (5) are respectively arranged below the two sides of the chilled water tank; and a connecting pipe (6) runs through the interior of the chilled water tank (1) between the high-temperature, humid, hot air inlet (4) and the cold air outlet (5).

2. The waste heat recovery device according to claim 1, characterized in that: The cold air outlet (5) is located below the water inlet (2) on the same side, and the water outlet (3) is located below the high-temperature humid hot air inlet (4) on the same side. The water inlet (2) and the water outlet (3) are arranged on different sides.

3. The waste heat recovery device according to claim 1, characterized in that: The connecting pipe (6) is a spiral steel pipe.

4. The waste heat recovery device according to claim 3, characterized in that: The side wall of the connecting pipe (6) is evenly coated with a thermal interface material (7).

5. The waste heat recovery device according to claim 4, characterized in that: The thermal conductive interface material (7) is made of silica gel or a phase change metal sheet.

6. The waste heat recovery device according to claim 1, characterized in that: The water outlet (3) and the cold air outlet (5) are respectively provided with a first temperature-sensing valve (8) and a second temperature-sensing valve (9).

7. The waste heat recovery device according to claim 1, characterized in that: The water outlet (3) is located lower than the cold air outlet (5).

8. The waste heat recovery device according to claim 6, characterized in that: The valve electronic control drive ends of the first temperature-sensing valve (8) and the second temperature-sensing valve (9) are connected to the control end of the controller of the control workshop.

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