Drying system

Abstract

The utility model provides a drying system which comprises a drying machine, a vacuum condensing device, a heating device and a heat circulating device. The vacuum condensing device is communicated with the drying machine through a vacuum steam pipeline, and the vacuum condensing device is used for increasing the temperature of a refrigerant by utilizing heat of steam discharged during material drying; the heating device is communicated with the drying machine through a heat-conducting oil pipeline and is used for heating the drying machine through heat-conducting oil; and the heat circulating device is communicated with the vacuum condensing device through a refrigerant pipeline, is also communicated with the dryer and the heat-conducting oil pipeline through a heat-conducting oil recovery pipeline, and is used for absorbing heat of a refrigerant to heat the heat-conducting oil. The energy consumption of the heating device can be reduced, so that the production cost is reduced.

Description

Technical Field

[0001] The present application relates to a drying technology for ternary positive electrode materials, and in particular to a drying system. Background Art

[0002] With the advancement of science and technology, new energy material battery technology has developed rapidly. Among them, ternary cathode materials are widely used in the production of lithium-ion battery cathodes due to their high energy density. During the production process of ternary cathode materials, they need to be dried to remove excess moisture from the material.

[0003] In the related art, the ternary cathode material can be dried using a corresponding drying system, which includes a dryer, a vacuum condensing device, and a heating device. During use, the ternary cathode material is placed in the dryer, which is heated by the heating device to convert the liquid water in the ternary cathode material into a gaseous state and discharge it. The vacuum condensing device uses a vacuum pump to extract the gaseous water vapor from the dryer, cooling it in the condenser and converting it into a liquid state, achieving vacuum dehydration and drying of the material.

[0004] However, when the related art solutions are used for drying, energy consumption is large and production costs are high. Utility Model Content

[0005] In order to overcome the above-mentioned defects in the related art, the purpose of this application is to provide a drying system, which is conducive to reducing the energy consumption of the drying system and thus reducing production costs.

[0006] The present application provides a drying system, comprising:

[0007] A dryer, wherein the dryer is used to dry the material;

[0008] A vacuum condensing device, the vacuum condensing device is connected to the dryer through a vacuum steam pipeline, and the vacuum condensing device is used to increase the temperature of the refrigerant by utilizing the heat of the water vapor discharged when the material is dried;

[0009] A heating device, the heating device is connected to the dryer through a thermal oil pipeline, and the heating device is used to heat the dryer through the thermal oil;

[0010] A heat circulation device is connected to the vacuum condensing device through a refrigerant pipeline. The heat circulation device is also connected to the dryer and the heat transfer oil pipeline through a heat transfer oil recovery pipeline. The heat circulation device is used to absorb the heat of the refrigerant to heat the heat transfer oil.

[0011] In a possible implementation, the vacuum condensing device includes an evaporator, and the evaporator is connected to the dryer through the vacuum steam pipeline;

[0012] The heat circulation device includes a condenser, the refrigerant pipeline includes a first refrigerant pipeline and a second refrigerant pipeline, and the condenser is connected to the evaporator through the first refrigerant pipeline and the second refrigerant pipeline; the thermal oil recovery pipeline includes a first thermal oil recovery pipeline and a second thermal oil recovery pipeline, and the condenser is connected to the dryer through the first thermal oil recovery pipeline, and the condenser is connected to the thermal oil pipeline through the second thermal oil recovery pipeline.

[0013] In a possible implementation, a compressor is further provided on the first refrigerant pipeline, and the compressor is used to increase the temperature and pressure of the refrigerant entering the condenser.

[0014] In a possible implementation, a throttle valve is further provided on the second refrigerant pipeline, and the throttle valve is used to control the flow rate of the refrigerant entering the evaporator.

[0015] In a possible implementation, the dryer is further connected to a filter, and the filter is connected to the evaporator through the vacuum steam pipeline.

[0016] In one possible implementation, the vacuum condensing device also includes a water collecting tank, a vacuum pump and a liquid water recovery pipeline, the liquid water recovery pipeline is connected to the evaporator, the water collecting tank and the vacuum pump are both arranged on the liquid water recovery pipeline, and the water collecting tank is located between the evaporator and the vacuum pump.

[0017] In a possible implementation, the heating device includes a thermal oil tank, a thermal oil pump and a heater. The two ends of the thermal oil pipeline are respectively connected to the thermal oil tank and the dryer. The thermal oil pump and the heater are arranged on the thermal oil pipeline.

[0018] In a possible implementation, a temperature detection device is further included, and the temperature detection device is disposed on the second thermal oil recovery pipeline.

[0019] In a possible implementation, an oil-water separator is further provided between the condenser and the thermal oil pipeline. The condenser is connected to the oil-water separator through the second thermal oil recovery pipeline, and the oil-water separator is connected to the thermal oil pipeline.

[0020] In one possible implementation, a gaseous cavity and a liquid cavity are provided in the oil-water separator, the gaseous cavity is connected to the thermal oil tank through a gas recovery pipeline, the thermal oil tank is also provided with an exhaust valve, and the liquid cavity is connected to the thermal oil pipeline through a liquid recovery pipeline.

[0021] The present application provides a drying system, comprising a dryer, a vacuum condensing device, a heating device, and a heat circulation device. The dryer is used to dry materials; the vacuum condensing device is connected to the dryer via a vacuum steam line, and is used to increase the temperature of the refrigerant by utilizing the heat from the water vapor discharged during material drying; the heating device is connected to the dryer via a thermal oil line, and is used to heat the dryer with the thermal oil; the heat circulation device is connected to the vacuum condensing device via a refrigerant line, and is further connected to the dryer and the thermal oil line via a thermal oil recovery line, and is used to absorb heat from the refrigerant to heat the thermal oil. In the present application, the vacuum condensing device absorbs the heat from the water vapor discharged during material drying to increase the temperature of the refrigerant; the heat circulation device then utilizes the higher temperature refrigerant to heat the thermal oil, and the heated thermal oil flows back into the thermal oil line to dry the material again. The above structure can reduce the energy consumption of the heating device, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 This is a simplified structural diagram of a drying system provided in one embodiment of the present application.

[0024] Reference numerals:

[0025] 10- Vacuum steam pipeline; 11- Liquid water recovery pipeline;

[0026] 20-thermal oil pipeline;

[0027] 31-first refrigerant pipeline; 32-second refrigerant pipeline;

[0028] 41-first heat transfer oil recovery pipeline; 42-second heat transfer oil recovery pipeline;

[0029] 51-gas recovery pipeline; 52-liquid recovery pipeline;

[0030] 100-dryer; 110-filter;

[0031] 210-evaporator; 220-water collecting tank; 230-vacuum pump;

[0032] 310-thermal oil tank; 320-thermal oil pump; 330-heater;

[0033] 410-condenser; 420-compressor; 430-throttle valve;

[0034] 500-oil-water separator; 510-gas chamber; 520-liquid chamber. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0036] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0037] As described in the background, the related art drying system suffers from high energy consumption and production costs. This is due to the fact that the heating device needs to continuously heat the dryer to maintain the preset drying temperature. This continuous heating consumes a lot of energy, thereby increasing production costs.

[0038] In light of this, the present invention provides a drying system in which a vacuum condenser absorbs heat from the water vapor emitted during drying to raise the refrigerant temperature. A heat circulation device then uses the higher-temperature refrigerant to heat the thermal oil, which then flows back into the thermal oil pipeline to dry the material again. This structure reduces the energy consumption of the heating device, thereby lowering production costs.

[0039] The contents of the embodiments of the present application will be described in detail below with reference to the accompanying drawings so that those skilled in the art can understand the contents of the present application in more detail.

[0040] Figure 1 This is a simplified structural diagram of the drying system provided in one embodiment of the present application. Figure 1 , this embodiment provides a drying system, including:

[0041] Dryer 100 is used to dry materials. For example, the materials in this embodiment can be ternary cathode materials or other materials. The type of dryer 100 can be selected based on specific needs. For example, the materials can be brought into indirect contact with a heat medium within the dryer, allowing the materials to absorb heat and reach a water evaporation temperature, thereby discharging the moisture in the materials as water vapor.

[0042] The vacuum condensing device is connected to the dryer 100 via a vacuum steam line 10. It utilizes the heat from the water vapor emitted during drying to raise the temperature of the refrigerant. For example, the vacuum condensing device can create a vacuum environment within the dryer 100, thereby lowering the evaporation temperature of the water and improving drying efficiency. The water vapor exchanges heat with the liquid refrigerant in the vacuum condensing device, raising the refrigerant's temperature and converting it from a liquid to a gaseous state.

[0043] A heating device is connected to the dryer 100 via a thermal oil pipeline 20 and is used to heat the dryer 100 with thermal oil. For example, the heating device can heat the thermal oil to a set temperature (it will be understood that the set temperature can be set according to the drying requirements of different materials) through electrical heating, fuel heating, etc., and then deliver the thermal oil into the dryer 100 to dry the material.

[0044] The heat circulation device is connected to the vacuum condensing unit via a refrigerant pipeline. It is also connected to the dryer 100 and the thermal oil pipeline 20 via a thermal oil recovery pipeline. The heat circulation device absorbs heat from the refrigerant to heat the thermal oil. For example, the refrigerant gas, which has a higher temperature after exchanging heat with water vapor, can be heated in the heat circulation device by exchanging heat with the thermal oil that has dried the material, thereby raising the temperature of the thermal oil. The heated thermal oil then flows back to the thermal oil pipeline 20 and continues to enter the dryer 100 to dry the material.

[0045] As can be seen from the above description, this embodiment utilizes a vacuum condenser to absorb heat from the water vapor emitted during material drying, thereby raising the refrigerant temperature. The heat circulation device then utilizes the higher-temperature refrigerant to heat the thermal oil, which then flows back into the thermal oil pipeline 20 for further material drying. This structure reduces the energy consumption of the heating device, thereby lowering production costs.

[0046] Please continue to refer to Figure 1 The vacuum condensing device of this embodiment includes an evaporator 210, which is connected to the dryer 100 through a vacuum steam pipeline 10. The water vapor discharged from the dryer 100 exchanges heat with the refrigerant in the evaporator 210, thereby increasing the temperature of the refrigerant and changing the refrigerant from liquid to gas.

[0047] The heat circulation device includes a condenser 410. The refrigerant pipeline includes a first refrigerant pipeline 31 and a second refrigerant pipeline 32. The condenser 410 is connected to the evaporator 210 via the first refrigerant pipeline 31 and the second refrigerant pipeline 32. The thermal oil recovery pipeline includes a first thermal oil recovery pipeline 41 and a second thermal oil recovery pipeline 42. The condenser 410 is connected to the dryer 100 via the first thermal oil recovery pipeline 41, and the condenser 410 is connected to the thermal oil pipeline 20 via the second thermal oil recovery pipeline 42.

[0048] The gaseous refrigerant with a higher temperature in the evaporator 210 enters the condenser 410 through the first refrigerant pipeline 31, and the thermal oil after drying the material enters the condenser 410 through the first thermal oil recovery pipeline 41. In the condenser 410, the gaseous refrigerant with a higher temperature exchanges heat with the thermal oil after drying the material to increase the temperature of the thermal oil. The thermal oil with a higher temperature enters the thermal oil pipeline 20 through the second thermal oil recovery pipeline 42, and then enters the dryer 100 again to continue drying the material. The temperature of the refrigerant after heat exchange in the condenser 410 decreases and becomes liquid, and enters the evaporator 210 again through the second refrigerant pipeline 32 to continue to exchange heat with water vapor to increase the temperature. In the above manner, this embodiment can reduce the energy consumption of the heating device, thereby reducing production costs.

[0049] In this embodiment, the refrigerant may be, for example, dichlorofluoroethane, hydrofluorocarbons or hydrofluorocarbons.

[0050] Please continue to refer to Figure 1 In this embodiment, a compressor 420 is further provided on the first refrigerant pipeline 31. The compressor 420 is used to increase the temperature and pressure of the gaseous refrigerant entering the condenser 410, thereby improving the heat exchange efficiency between the heat transfer oil after drying the material and the refrigerant.

[0051] In a possible implementation manner, a throttle valve 430 is further provided on the second refrigerant pipeline 32 of this embodiment. The throttle valve 430 is used to control the flow rate of the liquid refrigerant entering the evaporator 210 to improve the evaporation efficiency of the evaporator 210 .

[0052] like Figure 1 As shown, the dryer 100 of this embodiment is further connected to a filter 110 , which is connected to the evaporator 210 through the vacuum steam pipeline 10 . The filter 110 can filter out impurities in the water vapor discharged from the dryer 100 to prevent the impurities from entering the evaporator 210 .

[0053] In one possible embodiment, the vacuum condensing device of this embodiment further includes a water collection tank 220, a vacuum pump 230, and a liquid water recovery line 11. The liquid water recovery line 11 is connected to the evaporator 210. Water vapor exhausted from the dryer 100 undergoes heat exchange with the refrigerant in the evaporator 210 and is converted into condensed water. The condensed water is then discharged from the liquid water recovery line 11. The water collection tank 220 and the vacuum pump 230 are both disposed on the liquid water recovery line 11, with the water collection tank 220 located between the evaporator 210 and the vacuum pump 230. The vacuum pump 230 evacuates the dryer 100 through the liquid water recovery line 11 and the vacuum steam line 10, maintaining a vacuum state within the dryer 100. The water collection tank 220 is used to collect the condensed water.

[0054] Please continue to refer to Figure 1 The heating device of this embodiment includes a thermal oil tank 310, a thermal oil pump 320 and a heater 330. The two ends of the thermal oil pipeline 20 are respectively connected to the thermal oil tank 310 and the dryer 100. The thermal oil pump 320 and the heater 330 are arranged on the thermal oil pipeline 20. The thermal oil pump 320 can control the flow rate of the thermal oil flowing out of the thermal oil tank 310. The heater 330 is used to heat the thermal oil to a preset temperature to dry the material in the dryer 100.

[0055] Furthermore, this embodiment further includes a temperature detection device (not shown), which can be disposed on the second thermal oil recovery line 42. The temperature detection device can measure the temperature of the thermal oil after heat exchange in the condenser 410. If the temperature of the thermal oil after heat exchange reaches a preset temperature, the heater 330 can be controlled to stop heating. If the temperature of the thermal oil after heat exchange does not reach the preset temperature, the heater 330 can be controlled to continue heating the thermal oil to the preset temperature.

[0056] Please continue to refer to Figure 1 In this embodiment, an oil-water separator 500 is further provided between the condenser 410 and the thermal oil pipeline 20. The condenser 410 is connected to the oil-water separator 500 through the second thermal oil recovery pipeline 42. The oil-water separator 500 is connected to the thermal oil pipeline 20. The oil-water separator 500 can discharge the air mixed in the thermal oil.

[0057] Specifically, the oil-water separator 500 is provided with a gas chamber 510 and a liquid chamber 520. The gas chamber 510 can be located above the liquid chamber 520. Air mixed with the thermal oil is concentrated in the gas chamber 510 due to gravity. The gas chamber 510 is connected to the thermal oil tank 310 via a gas recovery line 51. The thermal oil tank is also equipped with an exhaust valve, through which air is discharged from the thermal oil tank 310. The liquid chamber 520 is connected to the thermal oil pipeline 20 via a liquid recovery line 52. The thermal oil, after being deaerated, enters the thermal oil pipeline 20 and then enters the dryer 100 to continue the drying process.

[0058] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0059] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0060] It should be noted that in the description of this application, the terms "first" and "second" are used solely to facilitate the description of different components and should not be understood to indicate or imply a sequential relationship, relative importance, or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0061] The various embodiments or implementation methods in this application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0062] In the description of this application, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of this application. In this application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A drying system, characterized in that: include: A dryer (100), the dryer (100) is used to dry the material; A vacuum condensing device, the vacuum condensing device being connected to the dryer (100) via a vacuum steam pipeline (10), the vacuum condensing device being used to increase the temperature of the refrigerant by utilizing the heat of water vapor discharged during material drying; a heating device, the heating device being connected to the dryer (100) via a heat-conducting oil pipeline (20), and the heating device being used to heat the dryer (100) via the heat-conducting oil; A heat circulation device is connected to the vacuum condensing device via a refrigerant pipeline, and the heat circulation device is also connected to the dryer (100) and the heat transfer oil pipeline (20) via a heat transfer oil recovery pipeline. The heat circulation device is used to absorb heat from the refrigerant to heat the heat transfer oil.

2. The drying system according to claim 1, characterized in that The vacuum condensing device comprises an evaporator (210), and the evaporator (210) is connected to the dryer (100) through the vacuum steam pipeline (10); The heat circulation device includes a condenser (410), the refrigerant pipeline includes a first refrigerant pipeline (31) and a second refrigerant pipeline (32), and the condenser (410) is connected to the evaporator (210) through the first refrigerant pipeline (31) and the second refrigerant pipeline (32); the thermal oil recovery pipeline includes a first thermal oil recovery pipeline (41) and a second thermal oil recovery pipeline (42), and the condenser (410) is connected to the dryer (100) through the first thermal oil recovery pipeline (41), and the condenser (410) is connected to the thermal oil pipeline (20) through the second thermal oil recovery pipeline (42).

3. The drying system according to claim 2, characterized in that A compressor (420) is also provided on the first refrigerant pipeline (31), and the compressor (420) is used to increase the temperature and pressure of the refrigerant entering the condenser (410).

4. The drying system according to claim 2, characterized in that The second refrigerant pipeline (32) is also provided with a throttle valve (430), and the throttle valve (430) is used to control the flow rate of the refrigerant entering the evaporator (210).

5. The drying system according to claim 2, characterized in that: The dryer (100) is further connected to a filter (110), and the filter (110) is connected to the evaporator (210) through the vacuum steam pipeline (10).

6. The drying system according to claim 2, characterized in that The vacuum condensing device further comprises a water collecting tank (220), a vacuum pump (230) and a liquid water recovery pipeline (11); the liquid water recovery pipeline (11) is connected to the evaporator (210); the water collecting tank (220) and the vacuum pump (230) are both arranged on the liquid water recovery pipeline (11), and the water collecting tank (220) is located between the evaporator (210) and the vacuum pump (230).

7. The drying system according to claim 2, characterized in that: The heating device comprises a thermal oil tank (310), a thermal oil pump (320) and a heater (330); two ends of the thermal oil pipeline (20) are connected to the thermal oil tank (310) and the dryer (100) respectively; and the thermal oil pump (320) and the heater (330) are arranged on the thermal oil pipeline (20).

8. The drying system according to claim 7, characterized in that It also includes a temperature detection device, which is arranged on the second heat transfer oil recovery pipeline (42).

9. The drying system according to claim 7, characterized in that: An oil-water separator (500) is further provided between the condenser (410) and the thermal oil pipeline (20); the condenser (410) is connected to the oil-water separator (500) via the second thermal oil recovery pipeline (42); and the oil-water separator (500) is connected to the thermal oil pipeline (20).

10. The drying system according to claim 9, characterized in that The oil-water separator (500) is provided with a gas chamber (510) and a liquid chamber (520). The gas chamber (510) is connected to the thermal oil tank (310) via a gas recovery pipeline (51). The thermal oil tank is also provided with an exhaust valve. The liquid chamber (520) is connected to the thermal oil pipeline (20) via a liquid water recovery pipeline (11).

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