Central water purification equipment with ultrasonic descaling device

Abstract

The utility model discloses central water purification equipment with an ultrasonic descaling device, which comprises an equipment main body, and a raw water tank, a pretreatment system, a membrane filtration system, a membrane cleaning device, a water purification tank and a water supply system are arranged in the equipment main body. The membrane filtration system consists of two sets of reverse osmosis membrane stacks, each reverse osmosis membrane stack consists of two stages of membrane assemblies, and each membrane assembly consists of a membrane shell, a reverse osmosis membrane element and an ultrasonic device. The membrane cleaning device is composed of a cleaning water tank and a pressure pump. After the membrane filtration system runs for a period of time, the membrane cleaning device is opened to perform ultrasonic descaling on the membrane stack needing to be cleaned, and the other set of membrane stack is opened to produce water, so that the service life of the reverse osmosis membrane is prolonged, and the continuous water supply of the water purification equipment is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification equipment, in particular to a central water purification equipment with an ultrasonic descaling device. Background Art

[0002] Reverse osmosis is a water treatment process that has developed rapidly since the 1960s. It is the most advanced, efficient and energy-saving pure water technology and has been widely used in the treatment of piped drinking water. During the operation of reverse osmosis equipment, due to the high concentration of various ions in the concentrated water, Ca 2+ Mg 2+ The ions will be in the form of CaCO 3 MgCO 3 The scale is crystallized in the form of ions and deposited on the surface of the membrane element, forming scale, which causes the membrane to be blocked, reduces the water production rate of the equipment, and affects the stable operation of the reverse osmosis system. Therefore, the membrane element must be treated for scale prevention. At present, the method of adding antiscalants is commonly used to inhibit scaling. However, the performance of existing antiscalants is relatively simple, and some contain phosphorus. They are easily polluted by the discharge of reverse osmosis concentrated water, which has a certain negative impact on the environment. Summary of the invention

[0003] The utility model is to overcome the shortcomings of existing water purification equipment and propose a central water purification equipment with an ultrasonic descaling device. On the basis of the original water purification equipment, a set of reverse osmosis membrane stack and membrane cleaning device are additionally provided, so as to achieve the purpose of cleaning the reverse osmosis membrane stack without affecting water production.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:

[0005] A central water purification device with an ultrasonic descaling device, characterized in that: the central water purification device comprises a device body, in which a raw water tank, a pretreatment system, a membrane filtration system, a membrane cleaning device, a clean water tank and a water supply system are arranged;

[0006] Raw water enters the raw water tank through a water inlet solenoid valve;

[0007] The raw water tank is connected to the pretreatment system through a raw water pump and a first one-way valve;

[0008] The main body of the pretreatment system is provided with a quartz sand filter, an activated carbon filter and a precision filter which are connected in sequence, and the precision filter is a PP cotton filter;

[0009] The pretreatment system is connected to the membrane filtration system via a first booster pump;

[0010] The membrane filtration system is composed of two sets of reverse osmosis membrane stacks. The concentrated water of the reverse osmosis membrane stacks is directly connected to the sewer through the concentrated water valve. The clean water outlet pipeline is divided into two, one is connected to the clean water tank through the clean water valve, and the other is connected to the membrane cleaning device through the diversion regulating valve;

[0011] The clean water tank is connected to the water supply system through a water outlet valve, a clean water pump and a second one-way valve.

[0012] The reverse osmosis membrane stack is composed of a two-stage membrane assembly, and the membrane assembly is composed of a membrane shell, a reverse osmosis membrane element and an ultrasonic device;

[0013] The membrane cleaning device is composed of a cleaning water tank and a second booster pump;

[0014] The membrane cleaning device is connected to the membrane filtration system through a cleaning valve.

[0015] The technical solution of the utility model has the following beneficial effects:

[0016] The technical solution of the utility model adds a set of reverse osmosis membrane stack and membrane cleaning device on the basis of the original water purification equipment. After the reverse osmosis membrane stack of the membrane filtration system has been running for a period of time, the membrane elements are descaled and cleaned. The membrane cleaning device is turned on to perform ultrasonic descaling on the membrane stack that needs to be cleaned, and at the same time, another set of membrane stacks is turned on to produce water. The utility model not only extends the service life of the reverse osmosis membrane, but also ensures uninterrupted water supply to the water purification equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the reverse osmosis membrane assembly of the utility model.

[0019] Wherein: 1. water inlet solenoid valve; 2. raw water tank; 3. raw water pump; 4. first one-way valve; 5. pretreatment system; 6. first booster pump; 7. first diverter valve; 8. second diverter valve; 9. membrane filtration system; 10. reverse osmosis membrane assembly; 101. membrane shell; 102. reverse osmosis membrane element; 103. ultrasonic device; 11. concentrated water valve; 12. first clean water valve; 13. second clean water valve; 14. first diverter regulating valve; 15. second diverter regulating valve; 16. membrane cleaning device; 17. cleaning water tank; 18. second booster pump; 19. first cleaning valve; 20. second cleaning valve; 21. clean water tank; 22. water outlet valve; 23. clean water pump; 24. second one-way valve; 25 water supply system. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are now further described in conjunction with the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention. Example

[0021] Reference Figure 1 , 2 A central water purification device with an ultrasonic descaling device, characterized in that: the central water purification device includes an equipment body, in which a raw water tank 2, a pretreatment system 5, a membrane filtration system 10, a membrane cleaning device 16, a clean water tank 21 and a water supply system 25 are arranged; raw water enters the raw water tank 2 through a water inlet solenoid valve 1; the raw water tank 2 is connected to the pretreatment system 5 through a raw water pump 3 and a first one-way valve 4; a quartz sand filter, an activated carbon filter and a precision filter are arranged in the main body of the pretreatment system 5 in sequence, and the precision filter The filter is a PP cotton filter; the pretreatment system 5 is connected to the membrane filtration system 9 through the first booster pump 6; the membrane filtration system 9 is composed of two sets of reverse osmosis membrane stacks, the concentrated water of the reverse osmosis membrane stacks is directly connected to the sewer through the concentrated water valve 11, and the clean water outlet pipeline is divided into two, one is connected to the clean water tank 21 through the clean water valves 12 and 13, and the other is connected to the membrane cleaning device 16 through the diversion regulating valves 14 and 15; the clean water tank 21 is connected to the water supply system 25 through the outlet valve 22, the clean water pump 23 and the second one-way valve 24. The reverse osmosis membrane stack is composed of a two-stage membrane assembly 10, and the membrane assembly 10 is composed of a membrane shell 101, a reverse osmosis membrane element 102 and an ultrasonic device 103; the membrane cleaning device 16 is composed of a cleaning water tank 17 and a second booster pump 18; the membrane cleaning device 16 is connected to the membrane filtration system 10 through cleaning valves 19 and 20.

[0022] A more detailed explanation is:

[0023] When the central water purification equipment with membrane stack automatic descaling device provided by the utility model is working, municipal tap water enters the raw water tank 2 through the water inlet solenoid valve 1, and the water in the raw water tank 2 is sent to the pretreatment system 5 through the raw water pump 3 and the first one-way valve 4 for preliminary filtration, filtering out large particle impurities such as rust and suspended matter in the water, and removing residual chlorine, odor and most organic pollutants in the water. The water filtered by the pretreatment system 5 enters the first set of reverse osmosis membrane stacks in the membrane filtration system 9 through the first booster pump 6 and the first diverter valve 7, filtering out harmful substances such as bacteria, viruses, heavy metals and organic matter in the water, and the filtered concentrated water is directly discharged into the sewer through the concentrated water valve 11, and the clean water enters the clean water tank 21 through the first clean water valve 12 for standby use. The clean water in the clean water tank is transported to the water supply system 25 through the outlet valve 22, the clean water pump 23, and the second one-way valve 24, and then transported to each household. After the first set of reverse osmosis membrane stacks in the membrane filtration system 9 has been running for a period of time, the membrane stacks are prone to scaling and pollution, which leads to a decrease in the water production efficiency and service life of the reverse osmosis membrane. Therefore, it is necessary to descale and clean it. At this time, the first diverter valve 7 is closed, and the second diverter valve 8, the second water purification valve 13, the diverter regulating valves 14, 15 and the first cleaning valve 19 are opened. The water filtered by the pretreatment system 5 passes through the first booster pump 6 and the second diverter valve 8 into the second set of reverse osmosis membrane stacks in the membrane filtration system 9 for filtration. After filtration, Part of the clean water enters the clean water tank 21, and the other part enters the cleaning water tank 17 in the membrane cleaning device 16 through the shunt regulating valves 14 and 15. When the cleaning water tank 17 is full of water, the second shunt regulating valve 14 is closed. Under the action of the second booster pump 18, the clean water enters the membrane assembly 10 of the first set of reverse osmosis membrane stack through the first cleaning valve 19. At this time, the ultrasonic device 103 in the membrane assembly 10 is turned on to perform ultrasonic descaling and cleaning on the membrane element 102. The concentrated water after cleaning enters the sewer through the concentrated water valve 11, and the clean water enters the cleaning water tank 17. When the second set of reverse osmosis membrane stack needs to be cleaned, the steps are the same as above. The utility model removes impurities such as scale formed on the membrane element through ultrasound, thereby extending the service life of the membrane stack.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A central water purification device with an ultrasonic descaling device, characterized in that: The central water purification equipment comprises an equipment body, in which a raw water tank, a pretreatment system, a membrane filtration system, a membrane cleaning device, a clean water tank and a water supply system are arranged; Raw water enters the raw water tank through a water inlet solenoid valve; The raw water tank is connected to the pretreatment system through a raw water pump and a first one-way valve; The main body of the pretreatment system is provided with a quartz sand filter, an activated carbon filter and a precision filter which are connected in sequence, and the precision filter is a PP cotton filter; The pretreatment system is connected to the membrane filtration system via a first booster pump; The membrane filtration system is composed of two sets of reverse osmosis membrane stacks. The concentrated water of the reverse osmosis membrane stacks is directly connected to the sewer through the concentrated water valve. The clean water outlet pipeline is divided into two, one is connected to the clean water tank through the clean water valve, and the other is connected to the membrane cleaning device through the diversion regulating valve; The clean water tank is connected to the water supply system through a water outlet valve, a clean water pump and a second one-way valve.

2. A central water purification device with an ultrasonic descaling device according to claim 1, characterized in that: The reverse osmosis membrane stack is composed of a two-stage membrane assembly, and the membrane assembly is composed of a membrane shell, a reverse osmosis membrane element and an ultrasonic device; The membrane cleaning device is composed of a cleaning water tank and a second booster pump; The membrane cleaning device is connected to the membrane filtration system through a cleaning valve.

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