Integrated ultrafiltration water purification equipment

Abstract

The invention belongs to the technical field of water purification equipment, and particularly relates to integrated ultrafiltration water purification equipment which comprises a first ultrafiltration assembly, the first ultrafiltration assembly comprises a plurality of ultrafiltration tanks which are communicated with one another, the multiple ultrafiltration tanks form graded filtration in the filtration direction, and a middle pressurization assembly is arranged between every two adjacent ultrafiltration tanks; the middle pressurization assembly adjusts the pressurization direction according to the water flow direction, the first ultrafiltration assembly comprises a first primary ultrafiltration tank and a first secondary ultrafiltration tank, and the front end of the first primary ultrafiltration tank is provided with a first water inlet valve and a first primary blow-down valve; a first water outlet valve and a first secondary blow-down valve are respectively arranged at the rear end of the first secondary ultrafiltration tank; the problem of poor backwashing effect caused by insufficient backwashing water flow pressure due to small pore diameter in the backwashing process can be avoided.

Description

Technical Field

[0001] This invention belongs to the field of water purification equipment technology, specifically relating to an integrated ultrafiltration water purification device. Background Technology

[0002] Integrated ultrafiltration water purification equipment generally adopts a modular integrated design, mainly consisting of a raw water pressurization system, a pretreatment unit, an ultrafiltration membrane module, a backwashing system, an automatic control system, and a disinfection device. The raw water pressurization pump ensures the pressure required for system operation; the pretreatment unit (such as a multi-media or activated carbon filter) removes large particulate impurities to protect the membrane elements; the core ultrafiltration membrane module (usually a hollow fiber membrane made of PVDF or PES material) achieves efficient physical sieving through micropores of 0.01–0.1 micrometers, effectively trapping suspended solids, colloids, bacteria, viruses, and large molecular organic matter in the water, producing clear, low-turbidity purified water; the backwashing system periodically performs air-water combined backwashing or water backwashing on the membrane to remove surface contaminants and maintain stable flux; the automatic control system enables intelligent operation of the equipment, including automatic start / stop, backwashing, and fault alarm functions, ensuring system safety and reliability; the disinfection device can further ensure microbial safety through ultraviolet light or chlorination disinfection.

[0003] In ultrafiltration water purification equipment, water permeates from the outside (or inside) of the membrane fibers to the inside (or outside) during the ultrafiltration process. Suspended solids, colloids, microorganisms, and other contaminants in the water are trapped on the membrane surface or in the pores. Over time, a filter cake layer gradually forms on the membrane surface, leading to a decrease in membrane flux and an increase in transmembrane pressure, thus affecting the effluent efficiency. To restore the membrane's filtration performance, the backwashing system is activated periodically, using reverse water flow to flush out the contaminants deposited on the membrane surface and in the pores. However, in typical ultrafiltration water purification equipment, multiple filter cartridges have the same pore diameter. While this effectively traps suspended solids, colloids, bacteria, viruses, and large organic molecules in the water, it results in relatively low water pressure after filtration. During backwashing, this low pressure makes it difficult to completely remove the trapped suspended solids, colloids, bacteria, viruses, and large organic molecules from the pore structure. Although frequent cleaning is performed, some remain in the pore structure.

[0004] Based on this, in order to ensure the ultrafiltration effect and avoid the problem of insufficient backwash water pressure caused by small pore diameter during backwashing, resulting in poor backwashing effect, an integrated ultrafiltration water purification device is proposed. Summary of the Invention

[0005] To address the aforementioned problems in the existing technology, the present invention provides an integrated ultrafiltration water purification device.

[0006] The objective of this invention can be achieved through the following technical solutions: An integrated ultrafiltration water purification device includes a first ultrafiltration component, which includes several interconnected ultrafiltration tanks. The several ultrafiltration tanks form a staged filtration along the filtration direction. A first intermediate pressurization component is provided between two adjacent ultrafiltration tanks. The first intermediate pressurization component adjusts the pressurization direction according to the water flow direction.

[0007] As a further embodiment of the present invention, the first ultrafiltration assembly includes a first primary ultrafiltration tank and a first secondary ultrafiltration tank. The front end of the first primary ultrafiltration tank is provided with a first inlet valve and a first primary drain valve, and the rear end of the first secondary ultrafiltration tank is provided with a first outlet valve and a first secondary drain valve.

[0008] As a further aspect of the present invention, a second ultrafiltration assembly is also included. The second ultrafiltration assembly includes a second primary ultrafiltration tank and a second secondary ultrafiltration tank. A second intermediate pressurization assembly is provided between the second primary ultrafiltration tank and the second secondary ultrafiltration tank. A second inlet valve and a second primary drain valve are respectively provided at the front end of the second primary ultrafiltration tank. A second outlet valve and a second secondary drain valve are respectively provided at the rear end of the second secondary ultrafiltration tank. The first inlet valve and the second inlet valve are connected to the same raw water pump. The first outlet valve and the second outlet valve are connected to the same backwash pump assembly. The first ultrafiltration assembly and the second ultrafiltration assembly are used alternately for ultrafiltration and backwashing.

[0009] As a further embodiment of the present invention, the first inlet valve, the first primary drain valve, the first outlet valve, the first primary drain valve, the second inlet valve, the second primary drain valve, the second outlet valve, and the second primary drain valve are all solenoid valves and are electrically connected to the control module.

[0010] As a further aspect of the present invention, the first inlet valve and the second inlet valve form a circuit interlock.

[0011] As a further embodiment of the present invention, both the first intermediate boosting assembly and the second intermediate boosting assembly include a first boosting module and a second boosting module. Both the first boosting module and the second boosting module include a boosting pump and a boosting conversion valve. The first boosting module and the second boosting module are electrically connected to the control module and form a circuit interlock.

[0012] As a further embodiment of the present invention, the backwash pump assembly includes a first backwash module and a second backwash module. Both the first backwash module and the second backwash module include a backwash pump and a backwash switching valve. The first backwash module and the second backwash module are electrically connected to the control module and form a circuit interlock.

[0013] As a further embodiment of the present invention, the backwash pump assembly is provided with a water outlet and a water outlet valve, and the water outlet valve is electrically connected to the control module.

[0014] The beneficial effects of this invention are as follows: (1) By classifying multiple ultrafiltration tanks, the pore structure inside the multiple ultrafiltration tanks for filtration gradually decreases along the water flow direction. This allows the ultrafiltration tank at the front end of the filtration process to filter out larger suspended solids, colloids, bacteria, viruses, and large organic molecules. Then, some smaller solid particles are filtered through the next stage of ultrafiltration tank. By gradually decreasing the pore size inside the multiple ultrafiltration tanks, on the one hand, it avoids the ultrafiltration tank at the front end from intercepting a large number of solid particles, which would reduce the water flow and pressure. On the other hand, because the multi-stage filtration disperses and intercepts solid particles of different sizes, the impact of the single ultrafiltration tank on the water flow and pressure reduction per unit time due to the interception of solid particles is smaller. During backwashing, the effect of higher pressure and reverse water flow in flushing away solid particles on the pores is better. At the same time, because multiple ultrafiltration tanks are set up for graded filtration, the ultrafiltration tank at the end of the backwash water flow direction receives lower water pressure during backwashing, which may result in a poor backwashing effect. Therefore, an intermediate pressurization component is set between two ultrafiltration tanks to increase the pressure and improve the backwashing effect.

[0015] (2) By connecting the front and rear ends of the two sets of ultrafiltration components respectively, and by controlling the opening and closing states of the first inlet valve, the second inlet valve, the first outlet valve, and the second outlet valve respectively, the two sets of ultrafiltration components can be used for simultaneous filtration, and can also achieve the effect of alternating use for ultrafiltration and backwashing. When the first inlet valve, the second inlet valve, the first outlet valve, and the second outlet valve are all in the open state, the two sets of ultrafiltration components are used for filtration simultaneously. If the first inlet valve, the first outlet valve, and the second outlet valve are opened, while the second inlet valve is closed, and then the second primary drain valve and the second secondary drain valve are opened, the backwash pump assembly can use the water filtered in the first ultrafiltration component for backwashing the second ultrafiltration component, and vice versa. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the intermediate booster assembly structure of the present invention; Figure 3 This is a schematic diagram of the backwash pump assembly structure of the present invention; Explanation of reference numerals in the attached drawings: 1. First primary ultrafiltration tank; 2. First stage ultrafiltration tank; 3. First intermediate pressurization assembly; 31. First pressurization module; 32. Second pressurization module; 4. Second primary ultrafiltration tank; 5. Second stage ultrafiltration tank; 6. Second intermediate pressurization assembly; 7. First primary drain valve; 8. First stage drain valve; 9. Second stage drain valve; 10. Second primary drain valve; 11. First inlet valve; 12. Second inlet valve; 13. Raw water pump; 14. Second outlet valve; 15. First outlet valve; 16. Backwash pump assembly; 161. First backwash module; 162. Second backwash module. Detailed Implementation

[0018] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0019] like Figures 1-3 As shown, an integrated ultrafiltration water purification device includes a first ultrafiltration component, which includes several interconnected ultrafiltration tanks. The several ultrafiltration tanks form a staged filtration along the filtration direction. A first intermediate pressurization component 3 is provided between two adjacent ultrafiltration tanks. The first intermediate pressurization component 3 adjusts the pressurization direction according to the water flow direction.

[0020] Because most ultrafiltration water purifiers have multiple filter cartridges with the same pore diameter, while they can effectively trap suspended solids, colloids, bacteria, viruses, and large organic molecules in the water, the filtered water pressure is relatively low. During backwashing, the low water pressure makes it difficult to completely backwash away the suspended solids, colloids, bacteria, viruses, and large organic molecules trapped in the pore structure. Even with frequent cleaning, some of these substances still remain in the pore structure.

[0021] To ensure effective ultrafiltration while avoiding insufficient backwash pressure due to small pore diameter during backwashing, multiple ultrafiltration tanks are staged. The pore structure within each tank progressively decreases in size along the flow direction. This allows the upstream ultrafiltration tanks to filter out larger suspended solids, colloids, bacteria, viruses, and large organic molecules, while smaller particles are passed to the next stage. This progressively smaller pore size prevents the upstream tanks from trapping too many particles, thus reducing water flow and pressure. Furthermore, the multi-stage filtration disperses and traps particles of varying sizes, minimizing the impact of reduced flow and pressure per unit time in a single tank. This results in better backwashing performance through higher pressure and counter-current flow.

[0022] Meanwhile, because multiple ultrafiltration tanks are set up for staged filtration, the ultrafiltration tank at the end of the backwash water flow direction experiences lower water pressure during backwashing, which can easily lead to poor backwashing effect. Therefore, an intermediate pressurization component is set up between two ultrafiltration tanks to increase the pressure and improve the backwashing effect.

[0023] As a further aspect of the present invention, the first ultrafiltration assembly includes a first primary ultrafiltration tank 1 and a first secondary ultrafiltration tank 2. The front end of the first primary ultrafiltration tank 1 is respectively provided with a first inlet valve 11 and a first primary drain valve 7, and the rear end of the first secondary ultrafiltration tank 2 is respectively provided with a first outlet valve 15 and a first secondary drain valve 8. The two-stage ultrafiltration tanks achieve graded filtration while avoiding the problem of insufficient water pressure. The first inlet valve 11 at the front end of the first primary ultrafiltration tank 1 is used to connect to a water source, the first outlet valve 15 at the rear end is used to discharge the filtered water, and the first primary drain valve 7 and the first secondary drain valve 8 are used to open during backwashing to discharge wastewater.

[0024] As a further aspect of the present invention, a second ultrafiltration assembly is also included. The second ultrafiltration assembly includes a second primary ultrafiltration tank 4 and a second secondary ultrafiltration tank 5. A second intermediate pressurization assembly 6 is provided between the second primary ultrafiltration tank 4 and the second secondary ultrafiltration tank 5. A second inlet valve 12 and a second primary drain valve 10 are respectively provided at the front end of the second primary ultrafiltration tank 4. A second outlet valve 14 and a second secondary drain valve 9 are respectively provided at the rear end of the second secondary ultrafiltration tank 5. A first inlet valve 11 and a second inlet valve 12 are connected to the same raw water pump 13. A first outlet valve 15 and a second outlet valve 14 are connected to the same backwash pump assembly 16. The first ultrafiltration assembly and the second ultrafiltration assembly are used alternately for ultrafiltration and backwashing.

[0025] Two identical ultrafiltration units are installed. By connecting the front and rear ends of the two units and controlling the opening and closing states of the first inlet valve 11, the second inlet valve 12, the first outlet valve 15, and the second outlet valve 14, the two units can be used for simultaneous filtration or for alternating ultrafiltration and backwashing. When all three valves are open, both units are used for filtration simultaneously. If the first inlet valve 11, the first outlet valve 15, and the second outlet valve 14 are opened, while the second inlet valve 12 is closed, and then the second primary drain valve 10 and the second secondary drain valve 9 are opened, the backwash pump assembly 16 can use the water filtered from the first ultrafiltration unit for backwashing the second ultrafiltration unit, and vice versa.

[0026] To facilitate easier switching between different operating states, in one embodiment, the first inlet valve 11, the first primary drain valve 7, the first outlet valve 15, the first primary drain valve 8, the second inlet valve 12, the second primary drain valve 10, the second outlet valve 14, and the second primary drain valve 9 are all solenoid valves electrically connected to the control module. By setting a control program in the control module, the solenoid valves in different positions can be adjusted to the corresponding opening and closing states according to the instructions of the control module, enabling rapid switching.

[0027] As a further aspect of the present invention, the first inlet valve 11 and the second inlet valve 12 form a circuit interlock when the first ultrafiltration component and the second ultrafiltration component are used alternately for ultrafiltration and backwashing. After the circuit interlock of the first inlet valve 11 and the second inlet valve 12, it can be used to avoid conflict between the two sets of opening and closing states when the first ultrafiltration component and the second ultrafiltration component are used for alternating ultrafiltration and backwashing.

[0028] As a further embodiment of the present invention, both the first intermediate pressurization assembly 3 and the second intermediate pressurization assembly 6 include a first pressurization module 31 and a second pressurization module 32. Both the first pressurization module 31 and the second pressurization module 32 include a pressurization pump and a pressurization switching valve. The first pressurization module 31 and the second pressurization module 32 are electrically connected to the control module and form a circuit interlock. The first pressurization module 31 and the second pressurization module 32 are connected in parallel in the pipeline of the first ultrafiltration assembly or the second ultrafiltration assembly. Since the water flow direction is different during filtration and backwashing, the first pressurization module 31 and the second pressurization module 32 need to be respectively configured to switch the corresponding pressurization pump and pressurization switching valve according to different working states for pressurization, while the pressurization pump and pressurization switching valve in the opposite direction need to be closed.

[0029] As a further embodiment of the present invention, the backwash pump assembly 16 includes a first backwash module 161 and a second backwash module 162. Both the first backwash module 161 and the second backwash module 162 include a backwash pump and a backwash switching valve. The first backwash module 161 and the second backwash module 162 are electrically connected to the control module and form a circuit interlock. The backwash pump also forms a parallel structure between the connecting pipes of the first ultrafiltration component and the second ultrafiltration component. Since the water flow direction is opposite when the first ultrafiltration component and the second ultrafiltration component are used alternately for ultrafiltration and backwashing, the opening and closing states of the first backwash module 161 and the second backwash module 162 are controlled according to the working states of the first ultrafiltration component and the second ultrafiltration component, respectively.

[0030] As a further aspect of the present invention, the backwash pump assembly 16 is provided with a water outlet and a water outlet valve, and the water outlet valve is electrically connected to the control module. Controlled by the control module, rapid switching can be achieved, reducing manual operation.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An integrated ultrafiltration water purification device, characterized in that: It includes a first ultrafiltration component, which includes several interconnected ultrafiltration tanks. The several ultrafiltration tanks form a staged filtration along the filtration direction. A first intermediate pressurization component is provided between two adjacent ultrafiltration tanks. The first intermediate pressurization component adjusts the pressurization direction according to the water flow direction.

2. The integrated ultrafiltration water purification equipment according to claim 1, characterized in that: The first ultrafiltration assembly includes a first primary ultrafiltration tank and a first secondary ultrafiltration tank. The front end of the first primary ultrafiltration tank is provided with a first inlet valve and a first primary drain valve, and the rear end of the first secondary ultrafiltration tank is provided with a first outlet valve and a first secondary drain valve.

3. The integrated ultrafiltration water purification device according to claim 2, characterized in that: It also includes a second ultrafiltration assembly, which includes a second primary ultrafiltration tank and a second secondary ultrafiltration tank. A second intermediate pressurization assembly is provided between the second primary ultrafiltration tank and the second secondary ultrafiltration tank. A second inlet valve and a second primary drain valve are respectively provided at the front end of the second primary ultrafiltration tank. A second outlet valve and a second secondary drain valve are respectively provided at the rear end of the second secondary ultrafiltration tank. The first inlet valve and the second inlet valve are connected to the same raw water pump. The first outlet valve and the second outlet valve are connected to the same backwash pump assembly. The first ultrafiltration assembly and the second ultrafiltration assembly are used alternately for ultrafiltration and backwashing.

4. The integrated ultrafiltration water purification device according to claim 3, characterized in that: The first inlet valve, the first primary drain valve, the first outlet valve, the first primary drain valve, the second inlet valve, the second primary drain valve, the second outlet valve, and the second primary drain valve are all solenoid valves and are electrically connected to the control module.

5. The integrated ultrafiltration water purification device according to claim 4, characterized in that: The first inlet valve and the second inlet valve form a circuit interlock.

6. The integrated ultrafiltration water purification device according to claim 4, characterized in that: The first intermediate booster assembly and the second intermediate booster assembly each include a first booster module and a second booster module. The first booster module and the second booster module each include a booster pump and a booster switching valve. The first booster module and the second booster module are electrically connected to the control module and form a circuit interlock.

7. The integrated ultrafiltration water purification device according to claim 4, characterized in that: The backwash pump assembly includes a first backwash module and a second backwash module. Both the first and second backwash modules include a backwash pump and a backwash switching valve. The first and second backwash modules are electrically connected to the control module and form a circuit interlock.

8. The integrated ultrafiltration water purification device according to claim 4, characterized in that: The backwash pump assembly is equipped with a water outlet and a water outlet valve, and the water outlet valve is electrically connected to the control module.

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