Filtering device and its liquid discharge device

Abstract

The application discloses a filtering device and a liquid discharge device thereof. The liquid discharge device comprises a vacuum container, a first air extraction assembly, an air inlet valve, a second air extraction assembly and a control module. The vacuum container has an extraction chamber and a liquid discharge chamber in the interior. The vacuum container is provided with a liquid inlet communicating with the extraction chamber. A communication assembly is arranged between the extraction chamber and the liquid discharge chamber. The vacuum container is further provided with a liquid discharge assembly communicating with the liquid discharge chamber. The first air extraction assembly is used for communicating with the extraction chamber. The air inlet valve and the liquid discharge chamber are communicated. The second air extraction assembly and the liquid discharge chamber are communicated. The control module is electrically connected with the air inlet valve and the second air extraction assembly. The control module controls the opening and closing of the air inlet valve and the second air extraction assembly in a time sequence mode. Compared with the mode of controlling multiple pneumatic valves by multiple time relays in the related art, the number of structures is reduced, the operation stability of the device is improved, the failure rate is reduced, the maintenance cost of the device is saved, the maintenance efficiency and the production cost are further improved.

Description

Technical Field

[0001] This application relates to the field of solid-liquid separation technology, specifically to a filtration device and its drainage device. Background Technology

[0002] Ceramic filtration equipment uses a vacuum device to create a vacuum that adsorbs the slurry onto the surface of the filter plate. Water in the slurry passes through the filter plate, while solid particles are trapped on the surface of the filter plate, thus achieving solid-liquid separation.

[0003] In ceramic filtration equipment, the dehydration and drainage process involves extracting the filtrate using a filtrate pump. The pressure of the extracted filtrate must exceed the negative pressure of the vacuum chamber for the filtrate to be drawn from the filter plates. The periodic filtration and drainage control of the vacuum chamber directly affect the filtration efficiency.

[0004] Currently, vacuum tank filtration and drainage typically employ a complex control loop consisting of four time relays and three pneumatic valves (such as a bypass valve, a secondary valve, and an inlet valve). Its operating cycle relies on the cascading and interlocking control of multiple time relays. For example, the second time relay first controls the secondary valve to open, then the third time relay controls the inlet valve to open, while the first time relay controls the bypass valve to close. This decentralized control architecture results in a large number of components, complex wiring, and rigid control logic. A failure in any one component will cause the control of the vacuum tank to fail, rendering the filtration equipment unusable and severely impacting the continuity and stability of production. Utility Model Content

[0005] This application mainly provides a filtration device and its drainage device, which can reduce the number of product components, improve the stability of equipment operation, reduce the failure rate, and save equipment maintenance costs.

[0006] According to a first aspect of this application, this application provides a draining device for a filtration apparatus, comprising: A vacuum container has a filtration chamber and a drain chamber inside. The vacuum container has a liquid inlet communicating with the filtration chamber. The liquid inlet is used to connect with the filtration mechanism of a filtration device that discharges filtrate. A conductive component is provided between the filtration chamber and the drain chamber. The vacuum container also has a drain component communicating with the drain chamber. A first air extraction assembly is used to connect to the filtration chamber; An air intake valve is connected to the drain chamber and is used to connect or disconnect the drain chamber from the outside. The second air extraction component is connected to the drain chamber and is used to connect or disconnect the drain chamber from the air extraction device. A control module is electrically connected to the air inlet valve and the second air extraction component. The control module has a filtration control mode and a drain control mode. The control module is configured to control the air inlet valve to close and the second air extraction component to open in the filtration control mode, or to control the air inlet valve to open and the second air extraction component to close in the drain control mode.

[0007] In one embodiment, an input module is further included, which is electrically connected to the control module. The input module is used to input control information to the control module to control the control module to switch to a filtration control mode or a drain control mode.

[0008] In one embodiment, a vacuum valve is also included, which is disposed at the liquid inlet and is used to connect or disconnect the liquid inlet from the filtration mechanism of the filtration device so that the filtrate flows to the suction chamber.

[0009] In one embodiment, a balancing valve is also included, which is used to connect the filtration chamber to the air extraction device.

[0010] In one embodiment, a three-way connector is also included, which connects the balance valve and the second suction assembly to the suction device.

[0011] In one embodiment, the system further includes a first liquid level detection module, which is electrically connected to the control module and the control module is electrically connected to the conductive component. The first liquid level detection module is used to detect the liquid level in the filtration chamber and, when the liquid level reaches a first preset liquid level, controls the control module to activate the conductive component.

[0012] In one embodiment, the conductive assembly includes a conductive pipe and a first check valve. The conductive pipe connects the filtration chamber and the discharge chamber, and the first check valve is disposed on the conductive pipe and electrically connected to the first liquid level detection module.

[0013] In one embodiment, a second liquid level detection module is further included. The second liquid level detection module is electrically connected to the control module, and the control module is electrically connected to the drainage assembly. The second liquid level detection module is used to detect the liquid level in the drainage chamber and, when the liquid level reaches a second preset liquid level, controls the drainage assembly to be opened through the control module.

[0014] In one embodiment, the drainage assembly includes a drainage pipe and a second check valve. The drainage pipe is connected to the drainage chamber, the second check valve is installed on the drainage pipe, and the second check valve is electrically connected to the second liquid level detection module.

[0015] According to a second aspect of this application, this application also provides a filtration device, including a filtration mechanism and a drainage device for the filtration device.

[0016] According to the filtration equipment and its drainage device in the above embodiments, the control module controls the opening or closing of the air inlet valve and the second air extraction component in a timing manner. Compared with the method of controlling multiple pneumatic valves by multiple time relays in related technologies, this method can significantly improve the stability of equipment operation, reduce the failure rate, save equipment maintenance costs, and further improve maintenance efficiency and production costs while reducing the number of structures. Attached Figure Description

[0017] Figure 1 A schematic diagram of the drainage device of the filtration equipment provided in this application; Figure 2 This is a schematic diagram of the filtration device provided in this application. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of this application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to this application are not shown or described in the specification. This is to avoid obscuring the core parts of this application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0019] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0020] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0021] Typically, the control device for vacuum tank filtration and drainage uses a complex configuration of four time relays and three pneumatic valves (bypass valve, auxiliary valve, and inlet valve). Its working cycle is as follows: first, the second time relay controls the auxiliary valve to open, then the third time relay controls the inlet valve to open, and at the same time, the first time relay controls the bypass valve to close, and the system enters the drainage stage (15 seconds). After the drainage is completed, the status of each valve is reset, and the cycle starts again. In addition, the fourth time relay resets the first three time relays every 90 seconds after the interval.

[0022] The control logic of the above-mentioned device is complex and there are many components. In actual production, if any time relay or valve fails, the vacuum tank control will fail, the filtration equipment will not be able to work properly, seriously affect the continuity and stability of production, and cause significant economic losses.

[0023] To address the aforementioned issues, this application provides a filtration device and its drainage mechanism, which can reduce the number of components in the product structure, improve equipment operational stability, reduce failure rate, and save on equipment maintenance costs.

[0024] See Figure 1 and Figure 2 As shown, this application provides a filtration device and its drainage device. The filtration device 1000 includes a filtration mechanism 100 and a drainage device 200. The filtration mechanism 100 can separate solids and liquids through pressure difference to screen out minerals or other materials. The filtration mechanism 100 includes a ceramic filter plate 101. The inner cavity of the ceramic filter plate 101 is a cavity, and the surface is arranged with a plurality of micropores communicating with the cavity. When the filtration device 1000 is running, the inner cavity of the filtration mechanism 100 (preferably the ceramic filter plate 101) is drawn into a vacuum, so that a pressure difference is generated between the inner cavity of the filtration mechanism 100 and the outside. The suspended material is adsorbed onto the ceramic filter plate 101 of the filtration mechanism 100 under the action of negative pressure, while the liquid passes smoothly through the micropores of the ceramic filter plate 101 under the action of vacuum pressure difference and the hydrophilicity of the ceramic filter plate 101, and enters the drainage device 200 of the filtration device 1000. The liquid is discharged or recycled through the drainage device 200, achieving the purpose of solid-liquid separation. The solid material adsorbed on the ceramic filter plate 101 is then further dried and collected and transported to a designated location.

[0025] See also Figure 1 and Figure 2 As shown, the drainage device 200 of the filtration equipment provided in this embodiment includes a vacuum container 21, a first air extraction component 22, an air inlet valve 23, a second air extraction component 24, and a control module 25.

[0026] The vacuum container 21 has a filtration chamber 211 and a drain chamber 212 inside. The vacuum container has an inlet 213 communicating with the filtration chamber 211. The inlet 213 is used to connect to the filtration mechanism 100 of the filtration device 1000 that discharges filtrate. The filtration chamber 211 allows filtrate to enter through negative pressure, while the drain chamber 212 discharges filtrate. The filtrate is a liquid filtered by the ceramic filter plate 101. A connecting component 214 is provided between the filtration chamber 211 and the drain chamber 212, allowing the filtrate in the filtration chamber 211 to flow to the drain chamber 212. The vacuum container 21 also has a drain component 215 communicating with the drain chamber 212, which discharges the filtrate flowing into the drain chamber 212.

[0027] The first vacuum assembly 22 is used to connect to the filtration chamber 211 to evacuate the filtration chamber 211, so that the filtration chamber 211 generates a certain negative pressure. Under the action of this negative pressure, the filtrate in the filtration mechanism 100 enters the filtration chamber 211 through the liquid inlet 213.

[0028] The air inlet valve 23 is connected to the drain chamber 212, and the air inlet valve 23 is used to connect or disconnect the drain chamber 212 from the outside.

[0029] The second suction assembly 24 is connected to the drain chamber 212 and is used to connect or disconnect the drain chamber 212 from the suction device 30. The control module 25 is electrically connected to the air inlet valve 23 and the second vacuum assembly 24. The control module 25 has a filtration control mode and a drain control mode. The control module 25 is configured to control the air inlet valve 23 to close and the second vacuum assembly 24 to open in the filtration control mode, so that the second vacuum assembly 24 evacuates the drain chamber 212 through the vacuum device 30. Alternatively, the control module 25 is configured to control the air inlet valve 23 to open and the second vacuum assembly 24 to close in the drain control mode.

[0030] In a specific embodiment, the filtration chamber 211 is evacuated under the action of the first suction component 22 to generate a first preset negative pressure. Under the action of the first preset negative pressure, the filtrate in the filter mechanism 100 enters the filtration chamber 211 through the liquid inlet 213. When the filtrate in the filtration chamber 211 reaches the first preset liquid level, the conduction component 214 is opened to discharge the filtrate into the discharge chamber 212. The control module 25 then switches to the discharge control mode, opens the air inlet valve 23 and closes the second suction component 24, creating a pressure difference between the inside and outside of the discharge chamber 212. Under the action of the pressure difference, the filtrate in the discharge chamber 212 is discharged through the discharge component 215. This state can last for 15 seconds. After the discharge stage ends (after 15 seconds), the control module 25 switches to the vacuum control mode to close the air inlet valve 23 and open the second suction component 24 to restore the initial state.

[0031] In this embodiment, the control module 25 can be a time relay, and the intake valve 23 and the second suction assembly 24 can be solenoid valves. The output contacts of the time relay are respectively connected to the solenoid valve coils of the intake valve 23 and the second suction assembly 24, and their opening or closing sequence is set by programming. The time relay controls the intake valve 23 and the second suction assembly 24 to open or close according to a preset time. For example, in the drain control mode, the intake valve 23 is controlled to open and the second suction assembly 24 is controlled to close according to a preset time. Compared with the related technology of controlling multiple pneumatic valves by multiple time relays, this control structure and control method can significantly improve the stability of equipment operation, reduce the failure rate, save equipment maintenance costs, and further improve maintenance efficiency and production costs while reducing the number of structures.

[0032] like Figure 2 As shown, the drainage device 200 of the filtration equipment provided in this embodiment also includes an input module 26. The input module 26 is electrically connected to the control module 25. The input module 26 is used to input control information to the control module 25 to control the control module 25 to switch to the suction filtration control mode or the drainage control mode. In a specific embodiment, the input module 26 can be a PLC controller, which inputs control information to the control module 25 through programming settings, thereby enabling the control module 25 to switch to the suction filtration control mode or the drainage control mode.

[0033] The drain device 200 of the filtration equipment provided in this embodiment also includes a vacuum valve 27. The vacuum valve 27 is disposed at the inlet 213. The vacuum valve 27 is used to connect or disconnect the inlet 213 from the filtration mechanism 100 of the filtration equipment 100, so that the filtrate flows to the suction chamber 211 after the vacuum valve 27 connects the inlet 213 to the filtration mechanism 100 of the filtration equipment 100.

[0034] In this embodiment, the draining device 200 further includes a balancing valve 28, which is used to connect the filtration chamber 211 to the air extraction device 30. The balancing valve 28 can balance the air pressure in the filtration chamber 211.

[0035] To facilitate the connection between the balance valve 28 and the suction device 30, the draining device 200 also includes a three-way pipe 29, which is used to connect the balance valve 28 and the second suction assembly 24 to the suction device 30, so that the balance valve 28 and the second suction assembly 24 share the suction device 30, thus saving equipment costs.

[0036] The filtrate in the filtration mechanism 100 flows into the suction chamber 211 through the drain port 213. When the filtrate in the suction chamber 211 reaches a certain amount, the conductive component 214 should be actively opened. In this embodiment, the drain device 200 also includes a first liquid level detection module 2111. The first liquid level detection module 2111 is electrically connected to the control module 25, and the control module 25 is electrically connected to the conductive component 214. The first liquid level detection module 2111 is used to detect the liquid level in the suction chamber 211, and when the liquid level reaches the first preset liquid level, the control module 25 controls the opening of the conductive component 214 to avoid excessive filtrate in the suction chamber 211.

[0037] The connecting component 214 includes a connecting pipe 2141 and a first check valve 2142. The connecting pipe 2141 connects the filtration chamber 211 and the drainage chamber 212. The first check valve 2142 is installed on the connecting pipe 2141 and is electrically connected to the first liquid level detection module 2111. The first liquid level detection module 2111 can be one of an ultrasonic liquid level sensor, an infrared liquid level sensor, etc., and is installed at the height of a first preset liquid level in the filtration chamber 211. When the liquid level in the filtration chamber 211 reaches the height of the first preset liquid level, the first liquid level detection module 2111 generates a position signal and, under the control of the processor, controls the first check valve 2141 to open according to the position signal, so as to connect the filtration chamber 211 and the drainage chamber 212 through the connecting pipe 2141, thereby allowing the filtrate in the filtration chamber 211 to flow into the drainage chamber 212 through the connecting pipe 2141. When the liquid level is lower than the first preset liquid level, the first check valve 2142 is in the closed state.

[0038] In this embodiment, the air inlet valve 23 and the first air extraction assembly 24 are opened or closed under the control of the control module 25 to drain the liquid. Similarly, when the liquid level in the drain chamber 212 reaches the second preset liquid level (maximum liquid level), drainage is also required. To address this, the drain device 200 of the filtration equipment provided in this embodiment further includes a second liquid level detection module 2121. The second liquid level detection module 2121 is electrically connected to the control module 25, and the control module 25 is electrically connected to the drain assembly 215. The second liquid level detection module 2121 is used to detect the liquid level in the drain chamber 212, and when the liquid level reaches the second preset liquid level, the control module 25 controls the opening of the drain assembly 215.

[0039] The drainage assembly 215 includes a drainage pipe 2151 and a second check valve 2152. The drainage pipe 2151 is connected to the drainage chamber 212, and the second check valve 2152 is installed on the drainage pipe 2151 and electrically connected to the second liquid level detection module 2121. The second liquid level detection module 2121 can also be one of an ultrasonic liquid level sensor, an infrared liquid level sensor, etc., and is set at the height of the second preset liquid level in the drainage chamber 212. When the liquid level in the drainage chamber 212 reaches the height of the second preset liquid level, the second liquid level detection module 2121 can generate a position signal, and under the control of the processor, it controls the second check valve 2152 to open according to the position signal, so as to connect the drainage chamber 212 with the outside through the drainage pipe 2151, thereby allowing the filtrate in the drainage chamber 212 to flow to the outside of the drainage chamber 212 through the drainage pipe 2151. When the liquid level is lower than the second preset liquid level, the second check valve 2152 is in the closed state.

[0040] In summary, in the filtration equipment and its drainage device provided in this application, the control module controls the opening or closing of the air inlet valve and the second air extraction component in a timing manner. Compared with the related technology that controls multiple pneumatic valves through multiple time relays, this method reduces the number of structures, significantly improves the stability of equipment operation, reduces the failure rate, saves equipment maintenance costs, and further improves maintenance efficiency and production costs.

[0041] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A draining device for a filtration apparatus, characterized in that, include: A vacuum container has a filtration chamber and a drain chamber inside. The vacuum container has a liquid inlet communicating with the filtration chamber. The liquid inlet is used to connect with the filtration mechanism of a filtration device that discharges filtrate. A conductive component is provided between the filtration chamber and the drain chamber. The vacuum container also has a drain component communicating with the drain chamber. A first air extraction assembly is used to connect to the filtration chamber; An air intake valve is connected to the drain chamber and is used to connect or disconnect the drain chamber from the outside. The second air extraction component is connected to the drain chamber and is used to connect or disconnect the drain chamber from the air extraction device. A control module is electrically connected to the air inlet valve and the second air extraction component. The control module has a filtration control mode and a drain control mode. The control module is configured to control the air inlet valve to close and the second air extraction component to open in the filtration control mode, or to control the air inlet valve to open and the second air extraction component to close in the drain control mode.

2. The draining device of the filtration equipment as described in claim 1, characterized in that, It also includes an input module, which is electrically connected to the control module. The input module is used to input control information to the control module to control the control module to switch to a filtration control mode or a drain control mode.

3. The draining device of the filtration equipment as described in claim 1, characterized in that, It also includes a vacuum valve, which is located at the liquid inlet and is used to connect or disconnect the liquid inlet from the filtration mechanism of the filtration device so that the filtrate flows to the suction chamber.

4. The draining device of the filtration equipment as described in claim 1, characterized in that, It also includes a balancing valve for connecting the filtration chamber to the air extraction device.

5. The draining device of the filtration equipment as described in claim 4, characterized in that, It also includes a three-way pipe for connecting the balance valve and the second air extraction assembly to the air extraction device.

6. The draining device of the filtration equipment as described in claim 1, characterized in that, It also includes a first liquid level detection module, which is electrically connected to the control module and the control module is electrically connected to the conductive component. The first liquid level detection module is used to detect the liquid level in the filtration chamber and, when the liquid level reaches a first preset liquid level, controls the control module to open the conductive component.

7. The draining device of the filtration equipment as described in claim 6, characterized in that, The conductive assembly includes a conductive pipe and a first check valve. The conductive pipe connects the filtration chamber and the discharge chamber. The first check valve is disposed on the conductive pipe and is electrically connected to the first liquid level detection module.

8. The draining device of the filtration equipment as described in claim 1, characterized in that, It also includes a second liquid level detection module, which is electrically connected to the control module and the control module is electrically connected to the drainage assembly. The second liquid level detection module is used to detect the liquid level in the drainage chamber and, when the liquid level reaches a second preset level, controls the opening of the drainage assembly through the control module.

9. The draining device of the filtration equipment as described in claim 8, characterized in that, The drainage assembly includes a drainage pipe and a second check valve. The drainage pipe is connected to the drainage chamber, the second check valve is installed on the drainage pipe, and the second check valve is electrically connected to the second liquid level detection module.

10. A filtration device, characterized in that, It includes a filtration mechanism and a drainage device for the filtration equipment as described in any one of claims 1-9.

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