Intelligent micro-level online precision filtering device

Abstract

The application relates to an intelligent micro-level online precision filtering device, and belongs to the technical field of non-metallic mineral processing. The device comprises a first branch, a second branch and a multi-stage filter group, a valve body for controlling the flow size and on-off is arranged on the pipeline of the branch, the valve body is connected with a control system, the multi-stage filter group has a liquid inlet end, a sewage discharge end, a filtrate discharge end and a backwashing inlet end, the sewage discharge end is connected with a sewage treatment tank through a pipeline, and the filtrate discharge end can be externally connected with a using device; the first branch comprises a first-stage filter, a first-stage filter liquid tank and a filter pump which are sequentially connected through pipelines, and the discharge end of the filter pump is connected with the liquid inlet end of the multi-stage filter group; the second branch comprises a clean water tank and a clean water pump which are sequentially connected through pipelines, and the output end of the clean water pump is connected with the backwashing inlet end of the multi-stage filter group. The application has the characteristics of simple structure, reliable performance, easy maintenance, low operation cost, effective and fast filtering and long service life.

Description

Technical Field

[0001] This invention relates to the field of non-metallic mineral processing technology, specifically to an intelligent micron-level online precision filtration device. Background Technology

[0002] With the improvement of people's living standards, the development of science and technology, and the country's support for strategic emerging industries, the future energy structure will continue to shift towards pollution-free green energy. Among them, photovoltaic solar energy, as an advantageous energy source, requires a large number of photovoltaic glass products, and its development is inseparable from high-quality quartz sand. The depletion of mineral resources makes it difficult to achieve the required purification standards through conventional separation operations such as gravity separation, magnetic separation, and flotation. Therefore, it is necessary to adopt a large number of media cleaning and purification processes such as acid leaching or dynamic acid washing to improve the quality of quartz sand.

[0003] The efficient operation of acid leaching and dynamic acid washing processes relies on reaction rates and rapid solid-liquid separation. Acid media recovery often employs processes such as natural sedimentation, siphon deacidification, and vacuum deacidification. However, all these processes share a common problem: the acid solution contains a large amount of suspended solid particles of 325 mesh or smaller. This results in the process water failing to meet the requirements for shaft seal water and sealing water. Using fresh water reduces the acid concentration in the system, increases the system's medium volume, and draining the solution wastes the effective components of the medium, increasing the difficulty of stabilizing system operation. Therefore, the key to solving this problem is to significantly reduce the particle size and content of solids in the liquid.

[0004] Current filtration technologies mostly rely on physical static filtration using one or more filter cartridges. This process easily leads to filter cartridge compaction and clogging, severely impacting the normal operation and lifespan of the filter. While adding automatic backwashing water to some equipment can extend its lifespan to some extent, the effect remains limited. Furthermore, the particle size of solid particles in the process water on the production line fluctuates widely. Direct physical static filtration causes the adsorption process on the filter cartridge to resemble the compaction process of river sedimentation, easily resulting in compaction, hindering water permeability, increasing filtration pressure, and reducing efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a simple, reliable, easy-to-maintain, low-cost, and intelligent micron-level online precision filtration device that solves the above-mentioned problems and overcomes the shortcomings of the prior art.

[0006] It adopts the following technical solution: An intelligent micron-level online precision filtration device includes a first branch, a second branch, and a multi-stage filter group. The pipes of the branch are equipped with valves that control the flow rate and on / off state, and the valves are connected to the control system. The multi-stage filter group has an inlet end, a drain end, a filtrate discharge end and a backwash inlet end. The drain end is connected to the sewage treatment tank through a pipeline, and the filtrate discharge end can be connected to external equipment. The first branch includes a primary filter, a primary filtrate tank, and a filter pump connected in sequence via pipelines. The discharge end of the filter pump is connected to the inlet end of the multi-stage filter group. The second branch includes a clear water tank and a clear water pump connected in sequence by pipes, and the output end of the clear water pump is connected to the backwash inlet of the multi-stage filter group; The primary filter includes an inlet and several small cone-angle precision hydrocyclones connected to it. The inlet is connected to the main process pipeline. The overflow end of the upper part of the small cone-angle precision hydrocyclone is connected to the inner collection tank and the drain outlet in sequence through a pipeline. The drain outlet is connected to the primary filter liquid tank. The underflow end of the lower part of the small cone-angle precision hydrocyclone is connected to the outer collection tank and the underflow drain outlet in sequence through a pipeline.

[0007] Furthermore, the multi-stage filter group includes at least one filter group, which includes a secondary filter and a tertiary filter.

[0008] Furthermore, both the second- and third-stage filters include: an outer shell, within which is an inner shell containing a filter element; an inlet and a backwash water outlet that pass through the outer shell and communicate with the inner shell, and a backwash water inlet that passes through the outer shell and is connected to the lower side of the inner shell; a drain outlet connected to the lower side of the outer shell; and a filtrate outlet connected to the upper side of the outer shell. The inlet of the secondary filter serves as the inlet of the multi-stage filter assembly, and the filtrate outlet of the secondary filter is connected to the inlet of the tertiary filter via a pipe. The backwash water outlet and drain outlet of the secondary and tertiary filters are connected by a pipeline and serve as the drain end of the multi-stage filter group. The backwash water inlets of the secondary and tertiary filters are connected by pipelines and serve as the backwash inlet of the multi-stage filter group; The filtrate outlet of the three-stage filter serves as the filtrate discharge end of the multi-stage filter group.

[0009] Furthermore, the filter element of the secondary filter is a corrosion-resistant filter bag assembly.

[0010] Furthermore, the filter element of the three-stage filter is a micron-level precision filter cartridge.

[0011] Furthermore, a corrosion-resistant ultrasonic transducer is provided on the support at the top of the inner shell of the secondary filter.

[0012] Furthermore, the outer casing of the three-stage filter has several corrosion-resistant ultrasonic transducers distributed on its peripheral surface.

[0013] Furthermore, both the filter pump and the clean water pump are equipped with a pressure-stabilizing storage tank.

[0014] Furthermore, a Venturi tube is connected in series on the main process pipeline. The suction port of the Venturi tube is connected to the underflow discharge port. A regulating valve is provided on the suction port. When liquid flows through the main process pipeline, the substance from the underflow discharge port is drawn into the Venturi tube through the suction port and discharged along the liquid in the main process pipeline.

[0015] Furthermore, there are two filter groups connected in parallel and in series with the first and second branches. The control valve body switches one filter group to be in use while the other filter group is on standby.

[0016] The advantages of this invention compared to the prior art are as follows: (1) The primary filtration adopts a continuous open design. The liquid flow is concentrated and separated into +(2-5)μm solid large particles by a precision hydrocyclone group. The liquid flows through the bottom flow and is collected in the outer collection tank. It is then siphoned into the main process pipe through the Venturi tube and sent away or collected in the sewage treatment tank. The -(2-5)μm fine particles that have undergone preliminary concentration and classification overflow and are collected in the inner collection tank and flow into the primary filtration liquid tank. This reduces the impact of coarse particles on subsequent processes by more than 60%, and can significantly extend the filter cartridge of the secondary filter and the filter cylinder of the tertiary precision filter. (2) The secondary and tertiary filters are configured with one in use and one in standby. The system is equipped with an automated control cabinet, which can automatically adjust the flow rate within a certain range as needed and achieve seamless switching. It can perform online automatic cleaning, ultrasonic assisted cleaning and other operations, which provides favorable conditions and uninterrupted operation for ensuring the normal operation of the filter. (3) The secondary and tertiary filters are equipped with ultrasonic-assisted and backwash water rinsing cleaning methods. Based on the structural characteristics of the secondary and tertiary filters, the ultrasonic waves of the secondary filter are conducted in a solid-liquid and liquid-liquid manner, while the tertiary filter mainly uses liquid-liquid conduction. This reasonable distribution ensures high-efficiency cleaning and can further extend the filter life. (4) The device can achieve online filtration and cleaning, and provide sealing lubricating water, shaft seal water and sealing water for equipment such as belt vacuum filter, avoiding the problems of decreased medium concentration and increased medium volume caused by using new water seal, and further improving process stability and reliability.

[0017] (5) The present invention has a simple structure, reliable performance, easy maintenance, low operating cost, and can effectively achieve rapid filtration and greatly extend the service life of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an intelligent micron-level online precision filtration device according to an embodiment of the present invention; Figure 2This is a schematic diagram of the structure of the primary filter in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the secondary filter in an embodiment of the present invention; Figure 4 This is a schematic diagram of the three-stage filter in an embodiment of the present invention; Figure 5 This is a schematic diagram of the connection of the venturi tube in an embodiment of the present invention; Figure 6 This is a schematic diagram of the pipeline connection of the filter pump / clean water pump in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached diagram: 100, First branch; 110, Primary filter; 111, Feed inlet; 112, Small cone angle precision hydrocyclone; 113, Inner collection tank; 114, Drain outlet; 115, Outer collection tank; 116, Underflow drain outlet; 120, Primary filtrate tank; 130, Filter pump; 131, Pressure stabilizing storage tank; 132, Control valve; 140, Main process pipeline; 141, Venturi tube; 142, Suction port; 143, Control valve; 200, Second branch; 210, Clear water tank; 2 20. Clean water pump; 300. Multi-stage filter assembly; 301. Liquid inlet; 302. Backwash water outlet; 303. Backwash water inlet; 304. Sewage outlet; 305. Filtrate outlet; 310. Secondary filter; 311. Outer casing; 312. Inner casing; 312a. Top compartment; 312b. Bottom compartment; 313. Filter element; 314. Corrosion-resistant ultrasonic transducer; 315. Support frame; 320. Tertiary filter; 400. Control system; 500. Wastewater treatment tank; 600. Flow meter unit. Detailed Implementation

[0020] To make the present invention clearer, the following description, in conjunction with the accompanying drawings, further illustrates an intelligent micron-level online precision filtration device of the present invention. The specific embodiments described herein are for illustrative purposes only and are not intended to limit the present invention.

[0021] like Figure 1 As shown, an intelligent micron-level online precision filtration device includes a first branch 100, a second branch 200, and a multi-stage filter assembly 300. Each branch has a valve on its pipe that controls the flow rate and on / off state; the valve is connected to a control system 400.

[0022] The multi-stage filter assembly 300 has multi-stage filtration and backwashing functions. It has an inlet end, a drain end, a filtrate discharge end and a backwashing inlet end that are connected to external pipelines.

[0023] In detail, the sewage discharge end of the multi-stage filter assembly 300 is connected to the sewage treatment tank 500 through a pipeline; the filtrate discharge end of the multi-stage filter assembly 300 is connected to the external equipment through the flow meter unit 600, which can control the quantitative use of the filtrate.

[0024] The first branch 100 includes a primary filter 110, a primary filtrate tank 120, and a filter pump 130 connected in sequence via pipes. The discharge end of the filter pump 130 is connected to the inlet end of the multi-stage filter assembly 300. The second branch 200 includes a clear water tank 210 and a clear water pump 220 connected in sequence via pipes. The output end of the clear water pump 220 is connected to the backwash inlet end of the multi-stage filter assembly 300.

[0025] Combination Figure 2 As shown, the primary filter 110 has the following specific structure: it includes an inlet 111, the inlet end of which is connected to the main process pipeline 140, and the outlet end of which is connected to 2-4 small cone-angle precision hydrocyclones 112 with anti-corrosion liners. The overflow end of the small cone-angle precision hydrocyclone 112 is connected to the inner collection tank 113 and the drain port 114 in sequence through a pipeline. The drain port 114 is connected to the primary filter liquid tank 120. The underflow end of the small cone-angle precision hydrocyclone 112 is connected to the outer collection tank 115 and the underflow drain port 116 in sequence through a pipeline.

[0026] The multi-stage filter group 300 includes at least one filter group, which includes a secondary filter 310 and a tertiary filter 320. In this embodiment, there are two filter groups connected in parallel and in series with the first and second branches. By controlling the valve body, one filter group is used while the other is kept on standby. This structure facilitates subsequent inspection and maintenance.

[0027] Combination Figure 3 , Figure 4 As shown, both the secondary and tertiary filters include: an outer casing 311, through which an inner casing 312 is connected by a corrosion-resistant metal alloy bracket 315, and a filter element 313 is disposed within the inner casing 312. An inlet 301 and a backwash water outlet 302 are provided, located on the upper side of the outer casing 311 and passing through the outer casing 311 and the inner casing 312. A backwash water inlet 303 is also provided, located on the lower side of the outer casing 311, passing through the outer casing 311 and connecting to the bottom of the inner casing 312. A drain outlet 304 is provided on the lower side of the outer casing 311, and a filtrate outlet 305 is provided on the upper side of the outer casing 311.

[0028] Among them, combined Figure 1As shown, the inlet 301 of the secondary filter serves as the inlet of the multi-stage filter assembly 300, and the filtrate outlet 305 of the secondary filter is connected to the inlet 301 of the tertiary filter via a pipe; the backwash water outlet 302 and the drain outlet 304 of the secondary and tertiary filters are connected via pipes and serve as the drain outlet of the multi-stage filter assembly 300; the backwash water inlet 303 of the secondary and tertiary filters are connected via pipes and serve as the backwash inlet of the multi-stage filter assembly 300; and the filtrate outlet 305 of the tertiary filter serves as the filtrate discharge outlet of the multi-stage filter assembly 300.

[0029] Of course, corresponding valves can be set in each of the above interfaces / ports according to the usage requirements, such as regulating control valves, shut-off valves and pressure gauges, to control the flow rate and on / off status of each pipeline interface. According to the diagram, control valves and pressure gauges are set at the liquid inlet 301 of the secondary and tertiary filters, control valves are set at the filtrate outlet 305, and shut-off valves are set at the backwash water inlet 303 and the drain outlet.

[0030] In some preferred embodiments, the filter element 313 of the secondary filter 310 is a corrosion-resistant filter bag assembly, which corresponds to a lower filtration precision. The filter element 313 of the tertiary filter 320 is a micron-level precision filter cartridge, which, for higher filtration precision, is installed in the top compartment 312a and bottom compartment 312b of the inner housing 312 in an embedded state and is locked in place by upper and lower plates. A corrosion-resistant ultrasonic transducer 314 is installed on the bracket 315 at the top of the inner shell 312 of the secondary filter 310; 4-8 corrosion-resistant ultrasonic transducers 314 are evenly distributed on the periphery of the outer shell 311 of the tertiary filter 320. Based on the structural characteristics of the secondary and tertiary filters, the secondary filter uses solid-liquid and liquid-liquid conduction methods for ultrasonic waves, while the tertiary filter mainly uses liquid-liquid conduction. The filter body 313 is cleaned using ultrasonic waves through the installation of corrosion-resistant ultrasonic transducers 314, combined with backwashing. Specifically: The inner wall of the filter element 313 is easily clogged by large particles. When cleaning the secondary and tertiary filters, first turn on the backwash water, then turn on the ultrasonic wave. The ultrasonic waves are transmitted through the support 315 and the inner shell 312 in the secondary filter, causing the filter element 313 to vibrate, as well as the liquid inside the support 315 and the outer shell 311 to vibrate, so as to achieve efficient cleaning. In the tertiary filter, the ultrasonic waves are transmitted to the filter element 313 inside through the cavity liquid and the support 315. Under the action of ultrasonic vibration and backwash water pressure, the large particles clogging the filter element are separated and carried away, so as to achieve efficient cleaning and further extend the filter life.

[0031] Combination Figure 5As shown, a Venturi tube 141 is connected in series on the main process pipeline 140. The suction port 142 of the Venturi tube 141 is connected to the underflow discharge port 116. A regulating valve 143 is provided on the suction port 142. When liquid flows through the main process pipeline 140, the substance in the underflow discharge port 116 is drawn into the Venturi tube 141 through the suction port 142 by the Venturi characteristics of the Venturi tube 141, and then discharged along the liquid in the main process pipeline 140.

[0032] Combination Figure 6 As shown, the filter pump 130 and the clean water pump 220 are both connected to a pressure-stabilizing storage tank 131 equipped with a safety valve. A regulating valve 132 is installed on the pipeline where their pumping ends are located to ensure that the pump body can provide a stable and adjustable flow rate.

[0033] For the automation setup of this device, the control system 400 is electrically connected to each valve body, corrosion-resistant ultrasonic transducer 314, and other actuators. This control system 400 can automatically adjust the flow rate within a certain range and achieve seamless switching by controlling each actuator, enabling online automatic cleaning, ultrasonic-assisted cleaning, and other operations. This provides favorable conditions and uninterrupted operation for ensuring the normal operation of the filter. Since this control system 400 is conventional technology in this field, it will not be described in detail here.

[0034] In operation, the raw liquid to be filtered passes through the first branch 100: the raw liquid passes through the small cone-angle precision hydrocyclone 112 of the primary filter 110, where centrifugal force concentrates and separates large solid particles, which are then collected in the outer collection tank 115 via the underflow. The solids are then siphoned into the main process pipeline 140 via the Venturi tube 141 and either discharged or collected in the wastewater treatment tank. Fine particles, after preliminary concentration and classification, overflow and collect in the inner collection tank 113 and flow into the primary filtrate tank 120. From there, they enter the multi-stage filter group 300 via the filter pump 130. The filtered clear liquid can be connected to external equipment; waste liquid is treated in the wastewater treatment tank 500. The second branch 200 pumps clean water from the clear water tank 210 to the backwash inlet of the multi-stage filter group 300 via the clear water pump 220. After backwashing, the resulting waste liquid enters the wastewater treatment tank 500 for treatment.

[0035] The above embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the implementation of the present invention. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. However, obvious variations or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. An intelligent micron-level online precision filtration device, characterized in that: It includes a first branch (100), a second branch (200) and a multi-stage filter group (300). The pipes of the branch are equipped with valves that control the flow rate and the on / off state. The valves are connected to the control system (400). The multi-stage filter assembly (300) has an inlet end, a drain end, a filtrate discharge end and a backwash inlet end. The drain end is connected to the sewage treatment tank (500) through a pipe, and the filtrate discharge end can be connected to external equipment. The first branch (100) includes a primary filter (110), a primary filtrate tank (120), and a filter pump (130) connected in sequence by pipes. The discharge end of the filter pump (130) is connected to the inlet end of the multi-stage filter group (300). The second branch (200) includes a clear water tank (210) and a clear water pump (220) connected in sequence by pipes. The output end of the clear water pump (220) is connected to the backwash inlet end of the multi-stage filter group (300). The primary filter (110) includes an inlet (111) and several small cone-angle precision hydrocyclones (112) connected thereto. The inlet (111) is connected to the main process pipeline (140). The overflow end of the upper part of the small cone-angle precision hydrocyclone (112) is connected to the inner collection tank (113) and the drain port (114) in sequence through the pipeline. The drain port (114) is connected to the primary filter liquid tank (120). The underflow end of the lower part of the small cone-angle precision hydrocyclone (112) is connected to the outer collection tank (115) and the underflow drain port (116) in sequence through the pipeline.

2. The intelligent micron-level online precision filtration device according to claim 1, characterized in that: The multi-stage filter group (300) includes at least one filter group, which includes a secondary filter (310) and a tertiary filter (320).

3. The intelligent micron-level online precision filtration device according to claim 2, characterized in that: Both the second- and third-stage filters include: an outer shell (311) with an inner shell (312) containing a filter element (313); an inlet (301) and a backwash water outlet (302) that pass through the outer shell (311) and communicate with the inner shell (312); a backwash water inlet (303) that passes through the outer shell (311) and is connected to the lower side of the inner shell (312); a drain outlet (304) connected to the lower side of the outer shell (311); and a filtrate outlet (305) connected to the upper side of the outer shell (311). The inlet (301) of the secondary filter serves as the inlet of the multi-stage filter group (300), and the filtrate outlet (305) of the secondary filter is connected to the inlet (301) of the tertiary filter through a pipe. The backwash water outlet (302) and drain outlet (304) of the secondary and tertiary filters are connected by pipes and serve as the drain end of the multi-stage filter group (300); The backwash water inlet (303) of the secondary and tertiary filters is connected by a pipeline and serves as the backwash inlet of the multi-stage filter group (300); The filtrate outlet (305) of the three-stage filter serves as the filtrate discharge end of the multi-stage filter assembly (300).

4. The intelligent micron-level online precision filtration device according to claim 3, characterized in that: The filter element (313) of the secondary filter (310) is a corrosion-resistant filter bag assembly.

5. The intelligent micron-level online precision filtration device according to claim 3, characterized in that: The filter element (313) of the three-stage filter (320) is a micron-level precision filter cartridge.

6. The intelligent micron-level online precision filtration device according to claim 3, characterized in that: The secondary filter (310) has a corrosion-resistant ultrasonic array (314) on the bracket (315) at the top of the inner shell (312).

7. The intelligent micron-level online precision filtration device according to claim 3, characterized in that: The outer casing (311) of the three-stage filter (320) has several corrosion-resistant ultrasonic elements (314) distributed on its peripheral side.

8. The intelligent micron-level online precision filtration device according to claim 1, characterized in that: The filter pump (130) and the clean water pump (220) are both equipped with a pressure-stabilizing storage tank (131).

9. The intelligent micron-level online precision filtration device according to claim 1, characterized in that: A venturi tube (141) is connected in series on the main process pipeline (140). The suction port (142) of the venturi tube (141) is connected to the underflow discharge port (116). A regulating valve (143) is provided on the suction port (142). When liquid flows through the main process pipeline (140), the substance from the underflow discharge port (116) is drawn into the venturi tube (141) through the suction port (142) and discharged along the liquid in the main process pipeline (140).

10. The intelligent micron-level online precision filtration device according to claim 2, characterized in that: The filter group consists of two filter groups connected in parallel and in series with the first and second branches. The control valve body switches one filter group to be in use while the other filter group is on standby.

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