Filtering device for diamond wire cleaning alkali liquor
By designing a lye filtration device including primary and secondary filtration equipment, the problems of insufficient filtration accuracy of lye filtration and easy blockage of single-stage filters in the prior art are solved, and high-efficiency filtration of lye and high-quality cleaning of black fine tungsten wires are achieved.
Patent Information
- Application Number
- CN202420858288.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-24
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-04-24
AI Technical Summary
In the prior art, the lye liquid filtration accuracy is insufficient, resulting in the black fine tungsten wire being unable to be completely whitened, and the single-stage filter is prone to clogging, affecting production efficiency and causing lye loss.
A filter device including a primary filtering equipment and a secondary filtering equipment is designed, and the primary filtering equipment, a magnetic pump and a secondary filtering equipment are connected in turn through a pipeline to form a lye filtration recycling system. The primary filter equipment adopts a three-layer screen filter, and the secondary filter equipment adopts a 10μm metal filter element.
Through this device, the cleanliness of the alkali liquid lasts for a long time, the amount of wire that can be cleaned by the same amount of alkali liquid increases by more than 2 times, the replacement cycle of the alkali liquid is longer than 1.5 times, and the surface of the washed white fine tungsten wire is bright and the wire diameter is uniform.
Smart Images
Figure CN222684827U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of filtration, in particular to a filtration device for diamond wire cleaning alkali solution. Background Art
[0002] The last step in the production of tungsten wire (also called diamond wire) used for cutting wires of photovoltaic silicon wafers is to use alkali solution to clean the graphite emulsion attached to the black tungsten wire in the electrolytic cell to produce white tungsten wire. The cleanliness of the circulating alkali solution directly affects the electrolysis efficiency and degree of the black tungsten wire in the alkali solution, and also directly determines the quality of the white tungsten wire. The alkali washing machine currently produced on the market has only single-stage filtration, and the filtration accuracy is not enough, resulting in a high content of graphite emulsion powder in the alkali solution, which ultimately makes it impossible to wash the black tungsten wire white. In addition, the single-stage filter is prone to clogging problems, and disassembly and cleaning are cumbersome, which affects production efficiency and also leads to a large loss of alkali solution. Utility Model Content
[0003] The utility model aims to provide a filtering device for cleaning alkali solution of diamond wire, so as to at least partially solve the problems existing in the prior art.
[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0005] A filtering device for diamond wire cleaning alkali solution comprises a primary filtering device, a magnetic pump and a secondary filtering device which are sequentially connected through pipelines; the diamond wire cleaning alkali solution is first filtered through the primary filtering device, and then transported to the secondary filtering device through the magnetic pump; the alkali solution filtered by the secondary filtering device is returned to the electrolytic cell for diamond wire cleaning, forming an alkali solution filtering and recycling system.
[0006] Preferably, the primary filtering equipment comprises an alkali solution tank and a three-layer mesh filter, the alkali solution tank serves as the alkali solution container body, and the three-layer mesh filter is installed at the upper end of the alkali solution tank.
[0007] Preferably, the three-layer screen filter is formed by 80-mesh screen, 120-mesh screen, and 150-mesh screen arranged in sequence from top to bottom and laid closely in a hollow square frame.
[0008] Preferably, the secondary filtration device is a filter using a 10 μm metal filter element.
[0009] The beneficial effects of the utility model are:
[0010] The utility model discloses a filtering device for diamond wire cleaning alkali solution, comprising a primary filtering device, a magnetic pump and a secondary filtering device which are sequentially connected through pipelines; the diamond wire cleaning alkali solution is first filtered through the primary filtering device, and then transported to the secondary filtering device through the magnetic pump; the alkali solution filtered by the secondary filtering device is returned to the electrolytic cell for diamond wire cleaning, forming an alkali solution filtering and recycling system; the cleanliness of the alkali solution filtered by the filtering device of the invention is maintained for a long time, the amount of wire material cleaned by the same amount of alkali solution can be increased by more than 2 times year-on-year, the replacement cycle of the alkali solution can be extended by more than 1.5 times, and the surface of the washed white fine tungsten wire is bright and the wire diameter is uniform. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0012] Figure 1 The utility model is a schematic diagram of the structure of the filtering device for cleaning alkali solution of diamond wire.
[0013] In the figure: 1-pipeline, 2-three-layer mesh filter, 3-alkali solution tank, 4-alkali solution, 5-magnetic pump, 6-secondary filtration equipment, 7-electrolytic cell.
[0014] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0015] The following will be described clearly and completely in conjunction with the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in 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.
[0016] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0017] The utility model discloses a filtering device for cleaning alkali solution of diamond wire.
[0018] According to the attached Figure 1 As shown, including:
[0019] The primary filtering device, magnetic pump 5 and secondary filtering device 6 are connected in sequence through pipeline 1; the diamond wire cleaning alkali solution is first filtered by the primary filtering device and then enters the alkali solution tank 3 to filter most of the graphite emulsion particles, and then the alkali solution 4 that enters the alkali solution tank 3 after being filtered by the primary filtering device is transported to the secondary filtering device 6 through the magnetic pump 5 to filter out some of the tungsten powder particles and ultrafine graphite emulsion particles remaining in the alkali solution 4 after being filtered by the primary filtering device, and the alkali solution filtered by the secondary filtering device 6 is returned to the electrolytic tank 7 for diamond wire cleaning, forming an alkali solution filtration and recycling system.
[0020] In one embodiment, the primary filtering equipment includes an alkali solution tank 3 and a three-layer mesh filter 2 . The alkali solution tank 3 serves as a container body for the alkali solution 4 , and the three-layer mesh filter 2 is installed on the upper end of the alkali solution tank 3 .
[0021] In one embodiment, the three-layer screen filter 2 is formed by 80-mesh screen, 120-mesh screen, and 150-mesh screen arranged sequentially from top to bottom and laid closely in a hollow square frame.
[0022] In one embodiment, the secondary filtering device 6 is a filter using a 10 μm metal filter element.
[0023] When the diamond wire cleaning alkali solution filtering device described in the utility model is in use, the diamond wire cleaning alkali solution enters from the upper end of the three-layer screen filter 2 of the primary filtering device, and the alkali solution 4 after being filtered through the 80-mesh screen, the 120-mesh screen, and the 150-mesh screen arranged in sequence from top to bottom enters the alkali solution tank 3 to filter most of the graphite emulsion particles, and then the alkali solution 4 entering the alkali solution tank 3 after being filtered by the primary filtering device is transported to the secondary filtering device 6 through the magnetic pump 5 to filter the remaining tungsten powder particles and ultrafine graphite emulsion particles in the alkali solution 4 after being filtered by the primary filtering device, and the alkali solution filtered by the secondary filtering device 6 is returned to the electrolytic tank 7 for diamond wire cleaning, forming an alkali solution filtering and recycling system.
[0024] The filtration device for cleaning alkali solution of diamond wire of the utility model is used to clean a roll of 160km of black fine tungsten wire, and the amount of alkali solution is 38L. During the cleaning process, the voltage is stable at 18V, and the current is also stable at 10.25A. After cleaning, the wire is tested to be bright, the wire diameter is 0.0351mm, and the ellipticity is 0.0001mm, which is completely up to the standard. The C content in the alkali solution is only 0.006%, and the wire is relatively clean.
[0025] By using the filtration device for cleaning alkali solution of diamond wire described in the utility model, 38L of alkali solution is prepared to clean the black thin tungsten wire. Under the condition that the voltage and current do not fluctuate greatly, 900km of the black thin tungsten wire can be cleaned continuously. When it exceeds 900km, the current begins to fluctuate and the electrolysis efficiency begins to decrease.
[0026] The filtration device of the prior art "alkaline washing machine only has single-stage filtration and insufficient filtration accuracy" was used to clean a roll of 160km black fine tungsten wire. The alkaline solution capacity was 38L, and the alkaline washing operation was carried out. The first wire diameter was 0.0351mm. During the alkaline washing process, when the cleaning reached 20km, the current began to decrease, and the brightness of the washed wire began to decrease. When the wire was lightly touched with white paper after ultrasonic cleaning, there was obvious graphite milky black body, indicating that the wire was not cleaned; when the cleaning reached 60km, it was found that the liquid level in the electrolytic cell dropped and the current dropped, indicating that the primary filter of the alkaline washing machine was partially blocked, resulting in insufficient water pressure, unable to guarantee the liquid level in the electrolytic cell, and insufficient electrolysis. The detected wire diameter also reached 0.0354mm, which was out of tolerance. After the whole roll of wire was cleaned, the alkaline solution sample was taken for inspection, and the C content reached 0.19%, which showed that there were many graphite milk particles.
[0027] A filtering device of the prior art "alkaline washing machine has only single-stage filtration and insufficient filtration accuracy" is used to prepare 38L of alkaline solution to clean the black tungsten filament. Under the condition that the voltage and current do not fluctuate greatly, 430km of the black tungsten filament can be cleaned continuously. When it exceeds 430km, the current begins to fluctuate and the electrolysis efficiency begins to decrease.
[0028] The utility model discloses a filtering device for cleaning alkali solution of diamond wire, comprising a primary filtering device, a magnetic pump and a secondary filtering device which are sequentially connected through pipelines; the alkali solution for cleaning the diamond wire is first filtered through the primary filtering device, and then transported to the secondary filtering device through the magnetic pump; the alkali solution filtered by the secondary filtering device is returned to the electrolytic cell for cleaning the diamond wire, so as to form an alkali solution filtering and recycling system; the cleanliness of the alkali solution filtered by the filtering device of the invention is maintained for a long time, the amount of wire material cleaned by the same amount of alkali solution can be increased by more than 2 times year-on-year, the replacement cycle of the alkali solution can be extended by more than 1.5 times, and the surface of the washed white fine tungsten wire is bright and the wire diameter is uniform.
[0029] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.
Claims
1. A filtering device for cleaning alkali solution of diamond wire, characterized in that: It includes a primary filtering device, a magnetic pump, and a secondary filtering device which are connected in sequence through pipelines; the alkali solution for cleaning the diamond wire is first filtered through the primary filtering device, and then transported to the secondary filtering device through a magnetic pump; the alkali solution filtered by the secondary filtering device is returned to the electrolytic cell for diamond wire cleaning, thus forming an alkali solution filtration and recycling system.
2. The filtering device for diamond wire cleaning alkali solution according to claim 1, characterized in that: The primary filtering equipment includes an alkali solution tank and a three-layer mesh filter. The alkali solution tank serves as the main body of the alkali solution container, and the three-layer mesh filter is installed on the upper end of the alkali solution tank.
3. The filtering device for diamond wire cleaning alkali solution according to claim 2, characterized in that: The three-layer screen filter is formed by 80-mesh screen, 120-mesh screen and 150-mesh screen arranged in sequence from top to bottom and laid closely in a hollow square frame.
4. The filtering device for diamond wire cleaning alkali solution according to claim 1, characterized in that: The secondary filtration device is a filter using a 10μm metal filter element.