Sand mill cleaning device

Abstract

The sand mill cleaning device comprises a first cleaning tank and a second cleaning tank, the first cleaning tank and the second cleaning tank are respectively connected with a discharge hole of a grinding cavity of the sand mill through pipelines; the pneumatic diaphragm pump is arranged on a liquid outlet pipeline of the first cleaning tank and the second cleaning tank and is used for pumping cleaning liquid or eluate from the first cleaning tank or the second cleaning tank to a grinding cavity of the sand mill; and the abrasive separation tank is arranged on liquid return pipelines of the first cleaning tank and the second cleaning tank, is connected with a feeding hole of the grinding cavity of the sand mill, and is used for separating a grinding medium and returning filtered clear liquid to the first cleaning tank or the second cleaning tank. The sand mill cleaning device has the advantages that the sand mill can be cleaned under the condition that the sand mill is not disassembled, manpower is saved, and production efficiency is improved; (2) the cleaning device is loaded through the moving platform, can be flexibly moved to the sand mill needing to be cleaned, and can flexibly clean sand mills with different sizes and positions.

Description

Technical Field

[0001] The utility model relates to the field of battery material production, in particular to a sand mill cleaning device. Background Art

[0002] In the existing production process of nano-sized battery materials, especially in the preparation of lithium iron phosphate, sand mills are one of the key equipment. Currently, most sand mills are equipped with a screen with a gap of approximately 0.15-0.2mm as a separator. During the operation of the sand mill, material will gradually accumulate on the screen, resulting in a reduction in the filtration area and eventually blocking the machine. Therefore, it is generally necessary to clean the screen regularly or perform emergency cleaning in the event of a blockage to ensure production use. The general cleaning method of the sand mill is to disassemble the grinding chamber, release the abrasive, remove the clogged screen, replace it with a new screen, and clean the blocked screen before it can be resumed. The disassembly process of the sand mill is time-consuming and laborious, and the abrasive needs to be refilled, which has a significant impact on the production schedule.

[0003] Chinese patent publication number CN117619506A discloses a sand mill blockage removal device and method for use. This device allows air to flow through the screen, reversing the flow and clearing the blockage. However, this method has drawbacks: after reaching a certain flow rate, the compressed air will preferentially escape through the unblocked pipes, preventing the entire screen from being thoroughly cleaned. Utility Model Content

[0004] The purpose of the utility model is to provide a high-efficiency cleaning device for a sand mill that is blocked without disassembling the machine, so as to solve the above technical problems.

[0005] A sand mill cleaning device comprises: a first cleaning tank for loading and providing cleaning liquid; a second cleaning tank for loading and providing eluate; the first cleaning tank and the second cleaning tank are connected to the discharge port of the sand mill grinding chamber through pipelines; a pneumatic diaphragm pump is arranged on the liquid outlet pipelines of the first cleaning tank and the second cleaning tank, and is used to pump cleaning liquid or eluate from the first cleaning tank or the second cleaning tank to the sand mill grinding chamber and an abrasive separation tank, and is arranged on the return liquid pipelines of the first cleaning tank and the second cleaning tank, connected to the feed port of the sand mill grinding chamber, and is used to separate grinding media and filter the supernatant liquid and return it to the first cleaning tank or the second cleaning tank.

[0006] Preferably, it further comprises a mobile platform, and the first cleaning tank, the second cleaning tank, the pneumatic diaphragm pump, the abrasive separation tank, etc. are all arranged on the mobile platform.

[0007] Preferably, the cleaning solution is a medium-concentration oxalic acid solution with a pH value not higher than 1; and the eluate is clean water or pure water.

[0008] Preferably, the volume of the first cleaning tank and the second cleaning tank is not less than the cavity volume of the grinding cavity of the sand mill.

[0009] Preferably, the first cleaning tank and the second cleaning tank have a heating function.

[0010] Preferably, it further comprises: a plurality of valves arranged on the liquid outlet pipes and liquid return pipes between the first cleaning tank, the second cleaning tank and the grinding chamber of the sand mill.

[0011] Preferably, the first cleaning tank and the second cleaning tank are provided with pure water interfaces for loading pure water.

[0012] The sand mill cleaning device of the utility model has the following advantages: 1) the sand mill can be cleaned without disassembling the sand mill, which saves manpower and improves production efficiency; 2) the cleaning device is loaded through a mobile platform and can be flexibly moved to the sand mill that needs to be cleaned. It can flexibly clean sand mills of different sizes and positions, and is convenient and flexible to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0014] Figure 1 It is a structural schematic diagram of the sand mill cleaning device of the present utility model. DETAILED DESCRIPTION

[0015] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0016] like Figure 1 As shown, a sand mill cleaning device 100 includes a mobile platform 110, which is generally a steel plate cart. A first cleaning tank 101 is mounted on the mobile platform 110 for loading and providing a cleaning solution, which is a medium-concentration oxalic acid solution with a pH value not higher than 1; a second cleaning tank 102 for loading and providing an eluate, which is clean or pure water. The volume of the first and second cleaning tanks 101, 102 is no less than the volume of the sand mill grinding chamber 103, and both have heating functions. The first and second cleaning tanks 101, 102 are provided with pure water ports 106 for loading pure water.

[0017] The first cleaning tank 101 and the second cleaning tank 102 are respectively connected to the discharge port 104 of the sand mill grinding chamber 103 via pipelines. A pneumatic diaphragm pump 105 is provided on the liquid discharge pipelines of the first cleaning tank 101 and the second cleaning tank 102 for pumping cleaning liquid or washing liquid from the first cleaning tank 101 or the second cleaning tank 102 to the sand mill grinding chamber 103. An abrasive separation tank 104 is provided on the liquid return pipelines of the first cleaning tank 101 and the second cleaning tank 102 and connected to the feed port 109 of the sand mill grinding chamber 103 for separating the grinding medium and returning the filtered supernatant liquid to the first cleaning tank 101 or the second cleaning tank 102. A plurality of valves are provided on the liquid discharge pipelines and liquid return pipelines between the first cleaning tank 101 and the second cleaning tank 102 and the sand mill grinding chamber 103.

[0018] The sand mill grinding chamber 103 is connected to the sand mill main unit 120, which drives the rotor in the sand mill grinding chamber 103 to perform grinding. The upper end of the sand mill grinding chamber 103 is a feed port 109, which can be connected to the feed pipe of the grinding reactor and the outlet of the cleaning liquid. The lower end of the sand mill grinding chamber 103 is a discharge port 107, which is connected to the feed pipe of the grinding reactor and the first and second cleaning tanks 101 and 102, or the pure water inlet.

[0019] For equipment where the grinding chamber 103 of the sand mill has been emptied and maintained normally, the cleaning process is as follows:

[0020] 1) Connect the abrasive separation tank 104 to the feed port of the sand mill grinding chamber 103 through a pipe, and connect the water outlet of the pneumatic diaphragm pump 105 to the discharge port of the sand mill grinding chamber 103, ensuring that the pipe connection is intact without leaks or other bypasses.

[0021] 2) Add a cleaning liquid (the cleaning liquid is a specific liquid that can dissolve scale) equivalent to the volume of the sand mill grinding chamber 103 into the first cleaning tank 101 and heat it to a certain temperature.

[0022] 3) Open the valves between the first cleaning tank 101 and the pneumatic diaphragm pump 105, as well as the valves between the abrasive separation tank 104 and the first cleaning tank 101, and start the sand mill grinding chamber 103 to achieve creeping rotation. Start the pneumatic diaphragm pump 105 and pump the cleaning solution into the sand mill grinding chamber 103 via a cycle of first cleaning tank 101 - pneumatic diaphragm pump 105 - sand mill grinding chamber 103 - abrasive separation tank 104 - first cleaning tank 101. The cycle lasts 2-6 hours, depending on the actual cleaning situation (which can be determined by pH changes). Once completed, close the pneumatic diaphragm pump 105 first, then close the valves involved in this step.

[0023] 4) Open the pure water valve and the connecting valve between the abrasive separation tank 104 and the second cleaning tank 102, start the pneumatic diaphragm pump 105, and control the pump speed of the pneumatic diaphragm pump 105. Use clean water to clean out all the cleaning liquid inside the sand mill grinding chamber 103 and enter the second cleaning tank 102.

[0024] 5) Restore the inlet and outlet of the sand mill grinding chamber 103 to complete the cleaning.

[0025] For equipment with blocked grinding chamber 103 of the sand mill and not properly emptied, the cleaning process is as follows:

[0026] 1) The pressure in the grinding chamber 103 of the sand mill is released to normal pressure through the pressure relief device of the grinding chamber 103 of the sand mill.

[0027] 2) Connect the abrasive separation tank 104 to the feed port of the sand mill grinding chamber 103 through a pipe, and connect the discharge port of the pneumatic diaphragm pump 105 to the discharge port of the sand mill grinding chamber 103, ensuring that the pipe connection is intact without leaks or other bypasses.

[0028] 3) Open the valve between the pure water and the pneumatic diaphragm pump 105, as well as the valve between the abrasive separation tank 104 and the slurry return grinding reactor, and connect the first cleaning tank 101-pneumatic diaphragm pump 105-sand mill grinding chamber 103-abrasive separation tank 104-production grinding reactor (not shown in the figure).

[0029] 4) Start the pneumatic diaphragm pump 105 and pump pure water (pure water can be directly from the pure water interface 106 or the second cleaning tank 102) into the sand mill grinding chamber 103 to wash the material back to the production grinding reactor. It takes at least 3 times the volume of the sand mill grinding chamber 103 to wash the material in the sand mill grinding chamber 103 back to the reactor. Then stop the pneumatic diaphragm pump 105 and clean the sand mill grinding chamber 103.

[0030] 5) Add cleaning liquid equivalent to the volume of the sand mill grinding chamber 103 into the first cleaning tank 101, open the valve between the first cleaning tank 101 and the pneumatic diaphragm pump 105, as well as the valve between the abrasive separation tank 104 and the slurry return grinding reactor, and connect the first cleaning tank 101-pneumatic diaphragm pump 105-sand mill grinding chamber 103-abrasive separation tank 104-production grinding reactor.

[0031] 6) First, the sand mill grinding chamber 103 is peristaltic, and the pneumatic diaphragm pump 105 is started. The sand mill grinding chamber 103 is cleaned in a cycle that loops through the first cleaning tank 101, the pneumatic diaphragm pump 105, the sand mill grinding chamber 103, the abrasive separation tank 104, and the first cleaning tank 101. Depending on the actual cleaning situation (which can be determined by pH changes), the cycle lasts 2-6 hours. Upon completion, the pneumatic diaphragm pump 105 is turned off, followed by the valves involved in this step.

[0032] 7) Open the pure water valve and the connecting valve between the abrasive separation tank 104 and the second cleaning tank 102, start the pneumatic diaphragm pump 105, and control the pump speed of the pneumatic diaphragm pump 105. Use clean water to clean out all the cleaning liquid inside the sand mill grinding chamber 103 and enter the second cleaning tank 102.

[0033] 6) Restore the inlet and outlet of the sand mill grinding chamber 103 to complete the cleaning.

[0034] The above examples are merely embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims of the present invention.

Claims

1. A sand mill cleaning device (100), characterized in that include: A first cleaning tank (101), used for loading and providing cleaning liquid; A second cleaning tank (102) for loading and providing eluate; The first cleaning tank (101) and the second cleaning tank (102) are respectively connected to the discharge port (107) of the sand mill grinding chamber (103) through pipelines; an air-operated diaphragm pump (105), arranged on the liquid outlet pipelines of the first cleaning tank (101) and the second cleaning tank (102), for pumping cleaning liquid or washing liquid from the first cleaning tank (101) or the second cleaning tank (102) to the sand mill grinding chamber (103); and The abrasive separation tank (104) is arranged on the return liquid pipeline of the first cleaning tank (101) and the second cleaning tank (102), connected to the feed port (109) of the sand mill grinding chamber (103), and is used to separate the grinding medium and filter the clear liquid to return it to the first cleaning tank (101) or the second cleaning tank (102).

2. The sand mill cleaning device (100) according to claim 1, characterized in that: Also included is a mobile platform (110); The first cleaning tank (101), the second cleaning tank (102), the pneumatic diaphragm pump (105), the abrasive separation tank (104), etc. are all arranged on the mobile platform (110).

3. The sand mill cleaning device (100) according to claim 1, characterized in that: The cleaning solution is a medium-concentration oxalic acid solution with a pH value not higher than 1; The eluate is clean water or pure water.

4. The sand mill cleaning device (100) according to claim 1, characterized in that: The volumes of the first cleaning tank (101) and the second cleaning tank (102) are not less than the volume of the grinding chamber (103) of the sand mill.

5. The sand mill cleaning device (100) according to claim 1, characterized in that: The first cleaning tank (101) and the second cleaning tank (102) have a heating function.

6. The sand mill cleaning device (100) according to claim 1, characterized in that Also includes: A plurality of valves are provided on the liquid outlet pipes and liquid return pipes between the first cleaning tank (101), the second cleaning tank (102) and the sand mill grinding chamber (103).

7. The sand mill cleaning device (100) according to claim 1, characterized in that: The first cleaning tank (101) and the second cleaning tank (102) are provided with pure water interfaces (106) for loading pure water.

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