Silicon carbide cutting fluid filtration device

Abstract

The silicon carbide cutting fluid filtering device disclosed in the application comprises a liquid inlet mechanism, a filtering mechanism and a backwashing mechanism, the filtering mechanism comprises a plurality of silicon carbide column membranes, the filtering mechanism can perform cyclic cross-flow filtration on raw water through the silicon carbide column membranes, the raw water is subjected to cross-flow filtration to obtain filtrate and concentrated water after entering the filtering mechanism from the liquid inlet mechanism, the filtrate flows into the backwashing mechanism and is stored in the backwashing mechanism, the concentrated water is discharged outside the filtering mechanism, and the backwashing mechanism can perform backwashing on the filtering mechanism by using part of the filtrate. The application can improve the filtering efficiency, easily maintain a high filtering flux, and still has good filtering performance after long-term use.

Description

Technical Field

[0001] This application relates to the field of filtration devices, and more particularly to silicon carbide cutting fluid filtration devices. Background Technology

[0002] In current cutting fluid treatment technologies, filtration is a crucial step in removing impurities from the cutting fluid. Traditional filtration methods are mostly dead-end filtration, where the cutting fluid passes directly through the filter medium. The filtration flux decreases significantly with prolonged filtration time, and the filter medium is easily contaminated. Once contaminated, the filtration efficiency drops drastically, requiring frequent replacement or cleaning of the filter medium. This not only increases maintenance costs but also reduces the utilization rate of raw water and the filtration rate.

[0003] Furthermore, during long-term operation, existing filtration equipment experiences a continuous accumulation of contaminants on the surface of the filter media, forming a filter cake. Over time, this filter cake thickens and becomes denser, leading to a continuous decrease in filtration flux. Consequently, it becomes impossible to maintain a high filtration flux effectively over the long term, thus impacting the operating efficiency and economic benefits of the filtration equipment. Utility Model Content

[0004] To address the problems of low filtration efficiency, difficulty in maintaining filtration flux, and ineffective filter cake removal leading to decreased filtration performance after long-term use in existing technologies, this application provides a silicon carbide cutting fluid filtration device, the specific solution of which is as follows: A silicon carbide cutting fluid filtration device includes an inlet mechanism, a filtration mechanism, and a backwashing mechanism. The filtration mechanism includes several silicon carbide column membranes. The filtration mechanism can perform cross-flow filtration of raw water through the silicon carbide column membranes. The raw water enters the filtration mechanism through the inlet mechanism and undergoes cross-flow filtration to obtain filtrate and concentrate. The filtrate flows into the backwashing mechanism and is stored therein. The concentrate is discharged to the outside of the filtration mechanism. The backwashing mechanism can use a portion of the filtrate to backwash the filtration mechanism.

[0005] Preferably, the filtration mechanism further includes a first filter cartridge, a second filter cartridge, and a circulation pump. A plurality of silicon carbide columnar membranes are fixedly disposed in the first filter cartridge and the second filter cartridge, respectively. The raw water circulates in the first filter cartridge and the second filter cartridge under the drive of the circulation pump.

[0006] Preferably, the filtration mechanism further includes a frequency converter, which is electrically connected to the circulating pump and can control the pumping speed of the circulating pump.

[0007] Preferably, the outer side of the plurality of silicon carbide columnar membranes in the first filter cartridge is provided with a first filtrate chamber for containing filtrate and isolating raw water, and the outer side of the plurality of silicon carbide columnar membranes in the second filter cartridge is provided with a second filtrate chamber for containing filtrate and isolating raw water.

[0008] Preferably, a first fixing plate and a second fixing plate are fixedly disposed inside the first filter cartridge, and a first filtrate cavity is formed between the first fixing plate and the second fixing plate, and a plurality of silicon carbide columnar membranes pass through the first fixing plate and the second fixing plate in sequence; a third fixing plate and a fourth fixing plate are fixedly disposed inside the second filter cartridge, and a second filtrate cavity is formed between the third fixing plate and the fourth fixing plate, and a plurality of silicon carbide columnar membranes pass through the third fixing plate and the fourth fixing plate in sequence.

[0009] Preferably, the first filter cylinder has a first filter outlet and a first backwash inlet on its wall, both of which are connected to the first filtrate chamber. The second filter cylinder has a second filter outlet and a second backwash inlet on its wall, both of which are connected to the second filtrate chamber. During filtration, the first and second backwash inlets are closed, and the filtrate flows into the backwashing mechanism from the first and second filter outlets. During backwashing, the first and second filter outlets are closed, a first portion of the filtrate flows into the first filter cylinder from the first backwash inlet, and a second portion of the filtrate flows into the second filter cylinder from the second backwash inlet.

[0010] Preferably, the backwashing mechanism includes a backwash water storage tank, a product water valve, a backwash pump, a backwash valve, and several drain valves. During filtration, the filtrate flowing out of the filtration mechanism flows through the product water valve and then into the backwash water storage tank. During backwashing, a portion of the filtrate in the backwash water storage tank flows through the backwash valve under the drive of the backwash pump and then into the filtration mechanism.

[0011] Preferably, the filtration mechanism further includes a concentrate valve, through which the concentrate flows from the first filter cylinder or the second filter cylinder and is discharged to the outside of the filtration mechanism.

[0012] Preferably, the liquid inlet mechanism includes a raw water tank, an inlet valve, and a booster pump. The raw water in the raw water tank flows through the booster pump and the inlet valve under the drive of the booster pump and then flows into the filtration mechanism.

[0013] Preferably, the silicon carbide cutting fluid filtration device further includes a control mechanism and several pressure and flow sensors. The control mechanism can set thresholds, including flow thresholds and pressure thresholds. The pressure and flow sensors are used to detect the flow rate and / or pressure of the liquid in the inlet mechanism, filtration mechanism, and backwashing mechanism and synchronize the detected values ​​to the control mechanism. When the detected values ​​exceed the thresholds, the control mechanism issues a warning.

[0014] One or more technical solutions provided in this application have at least the following technical effects or advantages: 1. The filtration mechanism performs cross-flow filtration of raw water. Cross-flow filtration can significantly improve the filtration flux and keep the filtration flux at a high level. The circulating cross-flow filtration ensures that the raw water is fully filtered, thereby separating more filtrate. Therefore, the utilization rate and filtration rate of raw water can be improved by using the filtration mechanism to perform cross-flow filtration of raw water. 2. During long-term use of the filtration mechanism, pollutants are continuously intercepted by the functional layer of the silicon carbide column membrane and form a thin filter cake. Over time, the filter cake will slowly thicken and become denser due to the driving force, thus reducing the filtration flux. By setting up a backwashing mechanism to perform backwashing operations on the filtration mechanism, the filter cake can be broken up and discharged, thereby enabling the filtration mechanism to maintain a high filtration flux during long-term use. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the silicon carbide cutting fluid filtration device provided in the embodiments of this application; Figure 2 This is a schematic diagram of the structure of the silicon carbide cutting fluid filtration device provided in the embodiments of this application; Figure 3 This is a top view of the silicon carbide columnar membrane and the first fixing plate provided in the embodiments of this application.

[0017] In the diagram: 1. First filter cartridge; 10. First filtrate chamber; 11. Silicon carbide column membrane; 12. First fixing plate; 13. Second fixing plate; 2. Second filter cartridge; 3. Circulation pump; 4. Booster pump; 5. Backwash pump; 101. Inlet valve; 102. Product water valve; 103. Concentrate valve; 104. Backwash valve; 105. Drain valve. Detailed Implementation

[0018] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described in this application are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0019] Please refer to the following: Figure 1 and Figure 3 A silicon carbide cutting fluid filtration device includes an inlet mechanism, a filtration mechanism, and a backwashing mechanism. The filtration mechanism includes several silicon carbide column membranes 11. The filtration mechanism can perform cross-flow filtration of raw water through the silicon carbide column membranes 11. The raw water enters the filtration mechanism through the inlet mechanism and undergoes cross-flow filtration to obtain filtrate and concentrate. The filtrate flows into the backwashing mechanism and is stored there. The concentrate is discharged outside the filtration mechanism. The backwashing mechanism can use a portion of the filtrate to backwash the filtration mechanism. Raw water refers to water containing impurities to be filtered. In this embodiment, raw water refers to cutting fluid. Concentrate refers to high-concentration raw water that has not passed through the silicon carbide column membranes 11 after cross-flow filtration.

[0020] Specifically, please refer to the following: Figure 1 and Figure 2 The filtration mechanism further includes a first filter cartridge 1, a second filter cartridge 2, and a circulation pump 3. A plurality of silicon carbide columnar membranes 11 are fixedly disposed inside the first filter cartridge 1 and the second filter cartridge 2, respectively. Raw water circulates within the first filter cartridge 1 and the second filter cartridge 2 under the drive of the circulation pump 3. The first end of the first filter cartridge 1 is fluidly connected to the first end of the second filter cartridge 2, and the second ends of the first filter cartridge 1 and the second filter cartridge 2 are fluidly connected via the circulation pump 3. The plurality of silicon carbide columnar membranes 11 are vertically arranged. The first end of the first filter cartridge 1 and the first end of the second filter cartridge 2 are either both upper or lower ends. The second end of the first filter cartridge 1 is the opposite end of the first end of the first filter cartridge 1, and the second end of the second filter cartridge 2 is the opposite end of the first end of the second filter cartridge 2.

[0021] Specifically, the filtration mechanism also includes a frequency converter, which is electrically connected to the circulating pump 3 and can control the pumping speed of the circulating pump 3.

[0022] Specifically, please refer to the following: Figure 2 and Figure 3The first filter cartridge 1 has a first filtrate chamber 10 on the outside of the silicon carbide column membranes 11 for containing filtrate and isolating raw water, and the second filter cartridge 2 has a second filtrate chamber on the outside of the silicon carbide column membranes 11 for containing filtrate and isolating raw water.

[0023] Specifically, please refer to the following: Figure 2 and Figure 3 The first filter cartridge 1 is fixedly provided with a first fixing plate 12 and a second fixing plate 13, and the first filtrate chamber 10 is formed between the first fixing plate 12 and the second fixing plate 13. A plurality of silicon carbide columnar membranes 11 pass through the first fixing plate 12 and the second fixing plate 13 in sequence, that is, the plurality of silicon carbide columnar membranes 11 are fixedly connected to the first filter cartridge 1 through the first fixing plate 12 and the second fixing plate 13. The second filter cartridge 2 is fixedly provided with a third fixing plate and a fourth fixing plate, and the second filtrate chamber is formed between the third fixing plate and the fourth fixing plate. A plurality of silicon carbide columnar membranes 11 pass through the third fixing plate and the fourth fixing plate in sequence, that is, the plurality of silicon carbide columnar membranes 11 are fixedly connected to the second filter cartridge 1 through the third fixing plate and the fourth fixing plate.

[0024] Specifically, please refer to the following: Figure 2 The first filter cylinder 1 has a first filter outlet and a first backwash inlet on its cylinder wall. Both the first filter outlet and the first backwash inlet are connected to the first filtrate chamber 10. The second filter cylinder 2 has a second filter outlet and a second backwash inlet on its cylinder wall. Both the second filter outlet and the second backwash inlet are connected to the second filtrate chamber. During filtration, the first backwash inlet and the second backwash inlet are closed, and the filtrate flows into the backwashing mechanism from the first filter outlet and the second filter outlet. During backwashing, the first filter outlet and the second filter outlet are closed, and a first portion of the filtrate flows into the first filter cylinder 1 from the first backwash inlet, and a second portion of the filtrate flows into the second filter cylinder 2 from the second backwash inlet.

[0025] Specifically, please refer to the following: Figure 1 The backwashing mechanism includes a backwash water storage tank, a product water valve 102, a backwash pump 5, a backwash valve 104, and several drain valves 105. The product water valve 102 can control the opening and closing of the first filter outlet and the second filter outlet, and the backwash pump 5 can control the opening and closing of the first backwash inlet and the second backwash inlet. During filtration, the filtrate flowing out of the filtration mechanism flows through the product water valve 102 and then into the backwash water storage tank. During backwashing, a portion of the filtrate in the backwash water storage tank flows through the backwash valve 104 under the drive of the backwash pump 5 and then into the filtration mechanism.

[0026] Specifically, please refer to the following: Figure 1 The filtration mechanism further includes a concentrate valve 103. The concentrate flows out from the first filter cylinder 1 or the second filter cylinder 2 and then flows through the concentrate valve 103. After flowing through the concentrate valve 103, the concentrate is discharged to the outside of the filtration mechanism.

[0027] Specifically, please refer to the following: Figure 1 The liquid inlet mechanism includes a raw water tank, an inlet valve 101, and a booster pump 4. The raw water in the raw water tank flows through the booster pump 4 and the inlet valve 101 under the drive of the booster pump 4 and then flows into the filtration mechanism.

[0028] Specifically, the silicon carbide cutting fluid filtration device also includes a control mechanism and several pressure and flow sensors. The control mechanism can set thresholds, including flow thresholds and pressure thresholds. The pressure and flow sensors are used to detect the flow rate and / or pressure of the liquid in the inlet mechanism, the filtration mechanism, and the backwashing mechanism and synchronize the detected values ​​to the control mechanism. When the detected values ​​exceed the thresholds, the control mechanism issues a warning.

[0029] Please refer to the following: Figure 1 and Figure 2 The control process of the silicon carbide cutting fluid filtration device is as follows: After opening the inlet valve 101, the booster pump 4 is started to send water into the first filter cartridge 1 and the second filter cartridge 2. A first pressure and flow sensor is installed on the water supply line from the booster pump 4 to the first filter cartridge 1 and the second filter cartridge 2. After the control mechanism detects that the pressure value returned by the first pressure and flow sensor is normal, the product water valve 102 and the circulation pump 3 are opened. The circulation pump 3 gradually increases the pumping speed through the frequency converter. During the filtration process, the booster pump 4 and the circulation pump 3 run continuously. The flow rate of the filtrate can be controlled by adjusting the opening of the product water valve 102, and the flow rate of the concentrate can be controlled by adjusting the opening of the concentrate valve 103. Backwashing is performed periodically during the filtration process.

[0030] Please refer to the following: Figure 1 and Figure 2 The backwashing operation procedure is as follows: shut down the booster pump 4 and the circulation pump 3, close the product water valve 102 and the concentrate valve 103; open the backwash valve 104 and all drain valves 105, and start the backwash pump 5 to perform backwashing.

[0031] A second pressure and flow sensor is installed between the product water valve 102 and the backwash water storage tank. When the flow rate returned by the second pressure and flow sensor is lower than the corresponding threshold, the control mechanism issues a warning related to the second pressure and flow sensor. The warning can be an audible alert or a warning message displayed on the control mechanism's screen. A decrease in the flow rate returned by the second pressure and flow sensor indicates a decrease in filtration flux; therefore, after the control mechanism issues the warning, a backwash operation must be performed immediately. By setting the backwash cleaning time through the control mechanism, the backwash operation can be performed automatically and periodically, thereby reducing the frequency of warnings related to the second pressure and flow sensor.

[0032] In summary, this application can improve filtration efficiency, easily maintain a high filtration flux, and still maintain good filtration performance after long-term use.

[0033] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0034] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of this application and its equivalents, this application also intends to include such modifications and variations.

Claims

1. A silicon carbide cutting fluid filtration device, characterized in that, The system includes a liquid inlet mechanism, a filtration mechanism, and a backwashing mechanism. The filtration mechanism comprises several silicon carbide column membranes. The filtration mechanism can perform cross-flow filtration of raw water through the silicon carbide column membranes. The raw water enters the filtration mechanism through the liquid inlet mechanism and undergoes cross-flow filtration to obtain filtrate and concentrate. The filtrate flows into the backwashing mechanism and is stored there. The concentrate is discharged to the outside of the filtration mechanism. The backwashing mechanism can use a portion of the filtrate to backwash the filtration mechanism. The filtration mechanism further includes a first filter cartridge, a second filter cartridge, and a circulation pump. Several silicon carbide columnar membranes are fixedly installed in the first filter cartridge and the second filter cartridge, respectively. The raw water circulates in the first filter cartridge and the second filter cartridge under the drive of the circulation pump. The backwashing mechanism includes a backwashing water tank, a product water valve, a backwashing pump, a backwashing valve, and several drain valves. During filtration, the filtrate flowing out of the filtration mechanism flows through the product water valve and then into the backwashing water tank. During backwashing, a portion of the filtrate in the backwashing water tank flows through the backwashing valve under the drive of the backwashing pump and then into the filtration mechanism. The circulating pump, the first filter cartridge, and the second filter cartridge are connected in series. The raw water is driven by the circulating pump to flow through the first filter cartridge and the second filter cartridge in sequence for circulating filtration.

2. The silicon carbide cutting fluid filtration device as described in claim 1, characterized in that, The filtration mechanism also includes a frequency converter, which is electrically connected to the circulating pump and can control the pumping speed of the circulating pump.

3. The silicon carbide cutting fluid filtration device as described in claim 1, characterized in that, The first filter cartridge has a first filtrate chamber on the outside of the plurality of silicon carbide column membranes for containing filtrate and isolating raw water, and the second filter cartridge has a second filtrate chamber on the outside of the plurality of silicon carbide column membranes for containing filtrate and isolating raw water.

4. The silicon carbide cutting fluid filtration device as described in claim 3, characterized in that, The first filter cartridge is fixedly provided with a first fixing plate and a second fixing plate, and the first filtrate chamber is formed between the first fixing plate and the second fixing plate. A plurality of silicon carbide columnar membranes pass through the first fixing plate and the second fixing plate in sequence. The second filter cartridge is fixed with a third fixing plate and a fourth fixing plate, and the second filtrate chamber is formed between the third fixing plate and the fourth fixing plate. A plurality of silicon carbide columnar membranes pass through the third fixing plate and the fourth fixing plate in sequence.

5. The silicon carbide cutting fluid filtration device as described in claim 3, characterized in that, The first filter cylinder has a first filter outlet and a first backwash inlet on its wall, both of which are connected to the first filtrate chamber. The second filter cylinder has a second filter outlet and a second backwash inlet on its wall, both of which are connected to the second filtrate chamber. During filtration, the first backwash inlet and the second backwash inlet are closed, and the filtrate flows into the backwashing mechanism from the first filter outlet and the second filter outlet; During the backwashing operation, the first filter outlet and the second filter outlet are closed. The first portion of the filtrate flows into the first filter cartridge from the first backwash inlet, and the second portion of the filtrate flows into the second filter cartridge from the second backwash inlet.

6. The silicon carbide cutting fluid filtration device according to any one of claims 1 to 5, characterized in that, The filtration mechanism also includes a concentrate valve. The concentrate flows out of the first filter cartridge or the second filter cartridge and then flows through the concentrate valve. After passing through the concentrate valve, the concentrate is discharged to the outside of the filtration mechanism.

7. The silicon carbide cutting fluid filtration device as described in claim 1, characterized in that, The liquid inlet mechanism includes a raw water tank, an inlet valve, and a booster pump. The raw water in the raw water tank flows through the booster pump and the inlet valve under the drive of the booster pump and then flows into the filtration mechanism.

8. The silicon carbide cutting fluid filtration device as described in claim 1, characterized in that, It also includes a control mechanism and several pressure and flow sensors. The control mechanism can set thresholds, including flow thresholds and pressure thresholds. The pressure and flow sensors are used to detect the flow rate and / or pressure of the liquid in the liquid inlet mechanism, the filtration mechanism, and the backwashing mechanism and synchronize the detected values ​​to the control mechanism. When the detected values ​​exceed the thresholds, the control mechanism issues a warning.

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