A coulter drying system

Abstract

The utility model discloses a plowshare drying system, including a plowshare dryer, the plowshare dryer including a tank body; a vacuum pump group, used to provide a negative pressure environment for the tank body; a first filter system, including a first negative pressure pipeline connected between the tank body and the vacuum pump group, and a first filter device, a dust concentration detection device and a first valve sequentially arranged on the first negative pressure pipeline along the air flow direction in the first negative pressure pipeline; a second filter system, including a second negative pressure pipeline, one end of the second negative pressure pipeline is connected to the first negative pressure pipeline and connected between the dust concentration detection device and the first valve, and the other end of the second negative pressure pipeline is connected to the vacuum pump group; the second valve and the second filter device are sequentially arranged on the second negative pressure pipeline along the air flow direction. In the normal state of the utility model, the first filter system works and the second filter system is on standby; when the dust concentration detection device detects that the concentration in the first negative pressure pipeline exceeds the limit, the second filter system replaces the first filter system.

Description

Technical Field

[0001] The utility model relates to the technical field of drying lithium battery positive electrode materials, and more specifically, to a plowshare drying system. Background Art

[0002] The coulter dryer is widely used for drying materials in the washing and coating process of lithium battery positive electrode materials. The coulter dryer dries materials by steam heating or electric heating, and the coulter dryer is in a negative pressure state. The high temperature negative pressure inside the coulter dryer accelerates the drying of materials in the coulter dryer. The water ring vacuum pump group is still widely used as the negative pressure source of the coulter dryer due to its simple structure and affordable price.

[0003] With the development of the lithium battery industry, the requirements for the yield of lithium battery materials are getting higher and higher, and the environmental emission requirements are becoming more and more stringent. Filters are widely used to intercept materials in negative pressure systems, but when the filter element fails, it will cause the dust material in the system to run into the water tank of the vacuum pump group, causing material waste, which will cause water pollution of the vacuum pump group and increase the failure rate of the vacuum pump group.

[0004] Therefore, how to provide a plow drying system that prevents dust materials in the system from escaping to the vacuum pump group after the filter element fails has become a technical problem that urgently needs to be solved in the field. Utility Model Content

[0005] The utility model aims to provide a coulter drying system which can prevent dust materials in the system from running to a vacuum pump group after a filter element fails.

[0006] The utility model provides a plowshare drying system, comprising a plowshare dryer, the plowshare dryer comprising a tank body; a vacuum pump group, used for providing a negative pressure environment for the tank body; a first filtering system, comprising a first negative pressure pipeline connected between the tank body and the vacuum pump group, and a first filtering device, a dust concentration detection device and a first valve sequentially arranged on the first negative pressure pipeline along the direction of air flow in the first negative pressure pipeline; a second filtering system, comprising a second negative pressure pipeline, one end of the second negative pressure pipeline is connected to the first negative pressure pipeline and connected between the dust concentration detection device and the first valve, and the other end of the second negative pressure pipeline is connected to the vacuum pump group; a second valve and a second filtering device are sequentially arranged on the second negative pressure pipeline along the direction of air flow.

[0007] Optionally, the vacuum pump group includes a common vacuum pump and a standby vacuum pump; the first filter system and the second filter system are connected to the common vacuum pump and the standby vacuum pump respectively;

[0008] The air inlet end of the standby vacuum pump is provided with a third valve.

[0009] Optionally, a pressure detection device is provided on the tank body.

[0010] Optionally, the first valve, the second valve and the third valve are all electrically controlled valves; the plow drying system also includes a PLC, which is electrically signal-connected to the pressure detection device, the first valve, the second valve and the third valve, respectively.

[0011] Optionally, the plow drying system further comprises a display, which is electrically connected to the dust concentration detection device.

[0012] Optionally, the first filtering device and / or the second filtering device is a back-blowing tank.

[0013] Optionally, the vacuum pump group further includes a frequency converter, and the frequency converter is electrically connected to the standby vacuum pump.

[0014] Optionally, the vacuum pump group further includes a vacuum pump water tank, and the common vacuum pump and the spare vacuum pump are both connected to the water tank.

[0015] Optionally, in the vacuum pump group, at least two common vacuum pumps are provided.

[0016] According to the technical content disclosed in the utility model, the following beneficial effects are achieved:

[0017] The plowshare drying system provided by the utility model comprises a first filtering system and a second filtering system. Under normal working conditions, the first filtering system works and the second filtering system is on standby. When the dust concentration detection device detects that the concentration in the first negative pressure pipeline exceeds the limit, it represents that the first filtering device fails. At this time, the first valve is immediately closed and the second valve is opened. The second filtering system takes over the first filtering system to filter between the plowshare dryer and the vacuum pump group to prevent dust from entering the vacuum pump group from the first negative pressure pipeline.

[0018] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0020] Figure 1 This is a schematic diagram of the structure of the plowshare drying system of the utility model.

[0021] Explanation of the accompanying reference numerals: 1. tank body; 2. negative pressure gauge; 3. plowshare back-blowing tank; 4. detection probe; 5. display; 6. first valve; 7. second valve; 8. insurance back-blowing tank; 9. normal vacuum pump; 10. third valve; 11. spare vacuum pump; 12. vacuum pump water tank. DETAILED DESCRIPTION

[0022] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0023] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0024] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0025] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0026] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0027] Currently, filters are widely used in the negative pressure system of plow dryers to filter materials, but some companies have not added material filter failure alarm devices, dust collection devices after filter failure, and negative pressure system stabilization devices.

[0028] See also Figure 1 The utility model discloses a plowshare drying system, comprising a plowshare dryer, a vacuum pump group, a first filtering system, a second filtering system and a PLC.

[0029] The plow dryer includes a tank body 1, on which a pressure detection device is provided, and the pressure detection device is a negative pressure gauge 2. The vacuum pump group includes a frequency converter, a common vacuum pump 9, a standby vacuum pump 11 and a vacuum pump water tank 12. A plurality of common vacuum pumps 9 are provided, and two are provided in this embodiment. A plurality of standby vacuum pumps 11 can be provided, and one standby vacuum pump 11 can be provided, and only one standby vacuum pump 11 is provided in this embodiment; both the common vacuum pump 9 and the standby vacuum pump 11 are connected to the vacuum pump water tank 12, and the common vacuum pump 9 and the standby vacuum pump 11 are used to provide a negative pressure environment for the tank body 1. The frequency converter is electrically connected to the standby vacuum pump 11 to control the start and stop of the standby vacuum pump 11.

[0030] The first filtering system includes a first negative pressure pipeline connected between the tank body 1 and the vacuum pump group, and a first filtering device, a dust concentration detection device and a first valve arranged on the first negative pressure pipeline in sequence along the air flow direction in the first negative pressure pipeline; in this embodiment, the first filtering device is a plow blade backblowing tank 3, the dust concentration detection device includes a detection probe 4 arranged in the first negative pressure pipeline and a display 5 connected to the detection probe 4 for displaying the detection value, and the first valve 6 is an electrically controlled valve.

[0031] The second filtering system includes a second negative pressure pipeline, one end of which is connected to the first negative pressure pipeline and connected between the detection probe 4 and the first valve 6, and the other end of the second negative pressure pipeline is connected to the vacuum pump group; the second valve 7 and the second filtering device are sequentially arranged along the air flow direction on the second negative pressure pipeline, and the second filtering device is a safety back-blowing tank 8.

[0032] The first filter system and the second filter system are connected to the common vacuum pump and the standby vacuum pump respectively, and the air inlet end of the standby vacuum pump 11 is provided with a third valve 10, which is an electrically controlled valve.

[0033] The PLC is respectively connected with the negative pressure gauge 2, the first valve 6, the second valve 7 and the third valve 10 by electrical signals.

[0034] Working principle: the plowshare backblowing tank 3 is installed on the upper part of the tank body 1, and is used to intercept material dust to prevent material dust from entering the vacuum pump water tank 12 from the first negative pressure pipeline; the detection probe 4 detects the dust concentration in the negative pressure gas, and the detection result is displayed on the display screen of the display 5. When the dust concentration is greater than the set value, an alarm is issued to remind the staff on duty that the filter element of the plowshare backblowing tank 3 is damaged. At the same time, the PLC controls the first valve 6 to close automatically and the second valve 7 to open automatically; the gas passes through the safety backblowing tank 8 of the second negative pressure pipeline, and the material in the gas is filtered through the filter in the safety backblowing tank 8, which plays the role of automatic insurance interception of materials. The standby vacuum pump 11 uses the reading of the plow blade negative pressure gauge 2 as the start and stop signal of the standby vacuum pump 11. The PLC controls the opening and closing of the third valve 10, and the frequency converter controls the start and stop of the standby vacuum pump 11. Under normal circumstances, multiple common vacuum pumps 9 are put into operation at the same time. However, when the common vacuum pump 9 fails, the negative pressure in the system will drop sharply, and the reading of the plow blade negative pressure gauge 2 will drop sharply. At this time, the standby vacuum pump 11 uses the reading of the plow blade negative pressure gauge 2 as the start and stop signal of the negative pressure regulating device. Under normal conditions, the standby vacuum pump 11 is in a normally closed state, and the third valve 10 is in a normally closed state. When the system negative pressure reaches the set lower limit, the third valve 10 opens, and the frequency converter controls the standby vacuum pump 11 to automatically start and be put into use, so as to ensure the stability of the negative pressure in the tank body 1 and the drying efficiency of the plow blade dryer. It should be noted that the common vacuum pump 9 is also electrically connected to the frequency converter to adjust the internal pressure of the tank body 1 in real time according to the pressure feedback of the plow blade negative pressure gauge 2 at any time.

[0035] In summary, the plowshare drying system provided by the utility model has a simple structure and is easy to operate. When the first filter system fails, the dust concentration detection device can send out an alarm, automatically switch to the second filter system for use to intercept materials, and the vacuum pump group automatically adjusts the negative pressure system pressure according to the negative pressure value in the plowshare dryer, which not only ensures that the materials in the system are smoothly intercepted and reused, but also ensures the stability of the negative pressure system pressure, thereby ensuring the drying efficiency of the plowshare dryer. The plowshare back-blowing tank 3 can intercept and return the dust materials in the plowshare dryer; the dust concentration detection device detects the dust concentration in the gas online, and automatically alarms when the dust concentration exceeds the set value, and the PLC controls each valve to automatically switch, and the negative pressure gas circulates from the insurance back-blowing tank 8. When the negative pressure of the plowshare dryer drops to the set lower limit, the third valve 10 opens, and the frequency converter controls the standby vacuum pump 11 to automatically start and be put into use, so as to ensure the stability of the negative pressure in the tank body 1.

[0036] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A plow blade drying system, characterized in that: include: A coulter dryer, the coulter dryer comprising a tank body; A vacuum pump set, used for providing a negative pressure environment for the tank; A first filtering system includes a first negative pressure pipeline connected between the tank body and the vacuum pump group, and a first filtering device, a dust concentration detection device and a first valve sequentially arranged on the first negative pressure pipeline along the air flow direction in the first negative pressure pipeline; The second filtering system includes a second negative pressure pipeline, one end of the second negative pressure pipeline is connected to the first negative pressure pipeline and is connected between the dust concentration detection device and the first valve, and the other end of the second negative pressure pipeline is connected to the vacuum pump group; the second valve and the second filtering device are sequentially arranged on the second negative pressure pipeline along the air flow direction.

2. The plow blade drying system according to claim 1, characterized in that: The vacuum pump group includes a common vacuum pump and a standby vacuum pump; the first filter system and the second filter system are connected to the common vacuum pump and the standby vacuum pump respectively; The air inlet end of the standby vacuum pump is provided with a third valve.

3. The plowshare drying system according to claim 2, characterized in that: The tank body is provided with a pressure detection device.

4. The plowshare drying system according to claim 3, characterized in that: The first valve, the second valve and the third valve are all electrically controlled valves; The plowshare drying system further comprises a PLC, and the PLC is respectively connected to the pressure detection device, the first valve, the second valve and the third valve by electrical signals.

5. The plowshare drying system according to any one of claims 1 to 4, characterized in that: The plow blade drying system further comprises a display, and the display is electrically connected to the dust concentration detection device.

6. The plowshare drying system according to any one of claims 1 to 4, characterized in that: The first filtering device and / or the second filtering device is a back-blowing tank.

7. The plowshare drying system according to any one of claims 2 to 4, characterized in that: The vacuum pump group further includes a frequency converter, and the frequency converter is electrically connected to the standby vacuum pump.

8. The plowshare drying system according to any one of claims 2 to 4, characterized in that: The vacuum pump group also includes a vacuum pump water tank, and the common vacuum pump and the standby vacuum pump are both connected to the water tank.

9. The plowshare drying system according to any one of claims 2 to 4, characterized in that: In the vacuum pump group, at least two common vacuum pumps are provided.

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