CN202046956U - Automatic control type backwashable reverse osmosis water purification machine - Google Patents

Abstract

The utility model relates to a reverse osmosis water purifier capable of reverse cleaning and automatic control. Raw water tanks, raw water pumps, multi-media filters, active carbon filters, scale inhibitor filling systems, security filters and high-pressure pumps pass through the After the water inlet pipeline is connected in sequence, it is connected to the inlet port of the reverse osmosis device and the RO cleaning system respectively. The outlet port of the reverse osmosis device is connected to the pure water tank and the pure water pump in turn through the outlet pipeline, and the pure water pump is connected to the pure water outlet; the RO cleaning system After connecting with the reverse osmosis device, connect the concentrated water outlet; the raw water tank inlet is equipped with a raw water electric valve, and the raw water tank and the purified water tank are respectively equipped with a liquid level gauge, a pipeline between the high-pressure pump and the RO cleaning system, and a reverse osmosis device Solenoid valves are installed on the pipelines between the outlet and concentrated water, the liquid level gauge is connected to the input end of the PLC, and the output end of the PLC is respectively connected to the raw water electric valve, raw water pump, pure water pump, and solenoid valve. The utility model can solve the problem that the reverse osmosis water purifier cannot reverse clean.

Description

Reverse osmosis water purifier with reverse cleaning and automatic control

technical field

The utility model relates to a reverse osmosis water purifier, in particular to a reverse osmosis water purifier capable of reverse cleaning and automatic control.

Background technique

Water is the source of human life, and people's requirements for drinking water quality and corresponding standards are constantly improving. However, due to the continuous increase in the discharge of industrial wastewater and domestic sewage and other water bodies, the pollution of water sources has become increasingly serious. Human beings have experienced the initial simple precipitation water purification to the traditional boiling treatment, and developed to the current deep purification of drinking water. At present, there are two ways to solve the problem of drinking water pollution: one is to protect drinking water sources and select high-quality drinking water sources; the other is to strengthen the drinking water treatment process. In developed countries, the drinking water purification process is very mature and the use of water purifiers is quite popular.

Reverse osmosis RO (Reverse osmosis, referred to as RO) membrane is a new type of purification material developed in recent years. The material uses reverse osmosis technology, that is, under the action of the osmotic pressure higher than the solution, only water is allowed to pass through, while other substances cannot pass through the semi-permeable membrane surface, so as to separate the moisture of some substances, so that the water can pass through. High salinity counterflows to low salinity, removes most harmful substances, heavy metals, soluble solids, etc. in the water, and only water molecules can pass through the reverse osmosis membrane to become pure water. Since the pore size of the reverse osmosis membrane is only 0.0001 microns, a bacterium must be reduced by 4000 times, and a filter virus must be reduced by more than 200 times to pass through, so it can effectively remove dissolved salts, colloids, microorganisms, organic matter, etc. in water. There are many kinds of reverse osmosis water purifiers at present, but because the RO membrane cannot be washed in time during use, too many impurities are deposited on the membrane, which will affect the filtration effect of the reverse osmosis water purifier and greatly reduce the reverse osmosis water purifier. The service life of the osmotic water purifier. Therefore, need to invent a kind of reverse osmosis water purifier that can regularly backwash.

Contents of the invention

The purpose of the invention of the utility model is to provide a reverse osmosis water purifier that can be automatically controlled for reverse cleaning to solve the above problems. The problem.

The utility model is realized through the following technical solutions: a reverse osmosis water purifier with reverse cleaning and automatic control, including a raw water tank, a raw water pump, a multi-media filter, an activated carbon filter, an antiscalant filling system, and a security filter device, high pressure pump, reverse osmosis device, pure water tank, pure water pump, RO cleaning system and programmable logic controller (Programmable Logic Controller, hereinafter referred to as PLC), among which, raw water tank, raw water pump, multimedia filter, activated carbon filter The antiscalant filling system, security filter and high-pressure pump are connected sequentially through the water inlet pipeline; the high-pressure pump is connected to the inlet port of the reverse osmosis device and the RO cleaning system respectively, and the outlet port of the reverse osmosis device is connected sequentially through the outlet pipeline. The pure water tank, the pure water pump, and the pure water pump are connected to the pure water outlet; the RO cleaning system is connected to the reverse osmosis device and connected to the concentrated water outlet; the raw water electric valve is installed at the inlet of the raw water tank, and the raw water tank and the pure water tank are respectively equipped with The liquid level gauge, the pipeline between the high pressure pump and the RO cleaning system, and the pipeline between the reverse osmosis device and the concentrated water outlet are respectively equipped with solenoid valves. The liquid level gauge is connected to the input end of the PLC, and the output of the PLC The terminals are respectively connected with the raw water electric valve, the raw water pump, the pure water pump and the solenoid valve.

Positive effects of adopting the above-mentioned technical solution: the utility model is based on the existing reverse osmosis water purifier, and the RO cleaning system is added, and the electromagnetic valve connected with the RO cleaning system is controlled by PLC, and the RO cleaning system is switched on and off at regular intervals. The RO membrane in the reverse osmosis device is cleaned to remove the impurities deposited on the RO membrane, so that the RO membrane can maintain a good filtration effect and prolong the service life of the reverse osmosis water purifier; The switching status of raw water electric valve, raw water pump, pure water pump and solenoid valve is controlled, and the operation is convenient; the utility model is similar to a flowing small pure water plant, which can be sent to remote factories and mines or the field conveniently and quickly by means of transportation. On the construction site, use underground well water or rivers and lakes to soak water sources to ensure that people there drink pure water.

4. Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1 raw water tank, 2 raw water pump, 3 multi-media filter, 4 activated carbon filter, 5 security filter, 6 high pressure pump, 7 reverse osmosis device, 8 pure water tank, 9 pure water pump, 10 RO cleaning system, 11 Raw water electric valve, 12, 12a liquid level gauge, 13, 13a solenoid valve, 14 slow open electric valve, 15 solution tank, 16 metering pump.

Five, specific embodiment: the utility model is further described below in conjunction with accompanying drawing:

Fig. 1 is a schematic structural view of the utility model, as shown in the figure, a reverse osmosis water purifier that can be automatically controlled by reverse cleaning includes a raw water tank 1, a raw water pump 2, a multimedia filter 3, an activated carbon filter 4, Antiscalant filling system, security filter 5, high pressure pump 6, reverse osmosis device 7, pure water tank 8, pure water pump 9, RO cleaning system 10 and PLC. Among them, the raw water tank 1, the raw water pump 2, the multimedia filter 3, the activated carbon filter 4, the antiscalant filling system, the security filter 5 and the high-pressure pump 6 are sequentially connected through the water inlet pipeline. The high-pressure pump 6 is connected to the inlet port of the reverse osmosis device 7 and the RO cleaning system 10 respectively, and the outlet port of the reverse osmosis device 7 is connected to a pure water tank 8 and a pure water pump 9 in turn through the outlet pipeline, and the pure water pump 9 is connected to the pure water outlet. The RO cleaning system 10 is connected to the reverse osmosis device 7 and connected to the concentrated water outlet. Raw water electric valve 11 is installed at the inlet of raw water tank 1, liquid level gauge 12 is installed in raw water tank 1, liquid level gauge 12a is installed in pure water tank 8, and solenoid valve is installed on the pipeline between high pressure pump 6 and RO cleaning system 10 13. A solenoid valve 13a is installed on the pipeline between the reverse osmosis device 7 and the concentrated water outlet, wherein the liquid level gauge 12 and the liquid level gauge 12a are connected to the input end of the PLC, and the output end of the PLC is respectively connected to the raw water electric valve 11 , Raw water pump 2, pure water pump 9, solenoid valve 13, solenoid valve 13a are connected.

The main function of the raw water tank 1 is to ensure that the raw water pump 2 has a stable water supply, and prevent the raw water pump 2 from being directly connected to the water source to cause shocks and fluctuations that will affect the equipment. Raw water electric valve 11 is equipped with at the inlet end of raw water tank 1, and liquid level gauge 12 is housed in raw water tank 1, and liquid level gauge 12 is used for measuring the variation of the liquid level height of raw water tank 1. The liquid level gauge 12 is connected to the input end of the PLC, and the output end of the PLC is connected to the raw water electric valve 11 and the raw water pump 2 respectively. The raw water pump 2 is used to ensure the flow and pressure stability of the raw water entering the water purifier system. In actual work, two raw water pumps 2 are set, one for standby and the other for use. The parameters of the liquid level measured by the liquid level gauge 12 are input to the PLC, and the PLC outputs after calculation to control the working status of the raw water electric valve 11 and the raw water pump 2 to determine the water intake.

The materials in the multimedia filter 3 mainly include filter materials such as quartz sand, manganese sand, anthracite, magnetite, and zeolite. Materials in the activated carbon filter 4 include activated carbon, compressed activated carbon fibers, and the like. The combination of the two can use the oxidation-reduction reaction to filter out iron, manganese, particles, odors and residual chlorine in the process of dosing from raw water. At the same time, the electron exchange in the redox reaction produces an electrolyte environment that makes most microorganisms unable to survive, so it can control the growth of bacteria, algae, fungi, etc. in the filter, greatly improving the adsorption capacity and service life of activated carbon, and Ensure that the effluent pollution index is less than or equal to 5. The multi-media filter 3 and the active carbon filter 4 are all fully automatic control, automatic backwashing at regular intervals.

The antiscalant filling system is to prevent the fouling and pollution of the membrane, prevent the deposition of scaling substances such as CaCO ₃ , CaSO ₄ , and CaF ₂ on the surface of the membrane, and add antiscalant to the reverse osmosis water purifier to ensure that the reverse osmosis The water purifier system operates stably for a long time under high recovery rate. Antiscalant is preferably imported special antiscalant for reverse osmosis, such as MDC220. The antiscalant filling system includes a solution tank 15 and a metering pump 16. The metering pump 16 is connected to the solution tank 15 by pipelines, and the solution tank 15 is connected to the water inlet pipeline. An antiscaling agent is housed in the solution tank 15, and the antiscaling agent is squeezed into the water inlet pipeline by a metering pump 16.

The function of the security filter 5 is to hold back particulate impurities larger than 3-5 μm. The device acts as a security guard to prevent impurities leaked from the pretreatment system from entering the reverse osmosis device 7. The filter is made of stainless steel, and the filter element is made of polypropylene and polyethylene composite fibers, with a filtration accuracy of 3-5 μm.

The function of the high-pressure pump 6 is to pressurize the raw water, and then send it to the reverse osmosis device 7 to provide sufficient water inlet pressure for the reverse osmosis device 7, so that the inlet water can pass through the reverse osmosis membrane to remove impurities and achieve the designed output. water volume. In order to protect the high-pressure pump 6 and prevent the high-pressure pump 6 from idling without water, a low-voltage protection switch is installed at the inlet of the high-pressure pump 6 . When the pressure at the pump port is lower than 0.05MPa, the pressure controls its action, so that the high-pressure pump stops running, prevents the high-pressure pump from idling without water, and ensures the safety of the high-pressure pump. At the same time, a high-pressure protection switch is installed at the outlet of the high-pressure pump 6. When the pressure at the pump port is higher than 1.6MPa, the pressure controls its action to stop the high-pressure pump and ensure the safety of the high-pressure pump, membrane casing and membrane components. In order not to damage the instrument due to a sudden increase in pressure when the reverse osmosis water purifier starts to work, a slow-open electric valve 14 can be installed at the outlet of the high-pressure pump 6. When starting up, open the slow-open electric valve 14 to make the pressure slow down. Ascent, gradually reaching the working pressure of the reverse osmosis device, reducing damage to the instrument caused by high pressure.

The reverse osmosis membrane element in the reverse osmosis device 7 adopts CPA8040 or equivalent products produced by Wharton or Hyde Energy. This membrane element has the characteristics of high desalination rate, good chemical stability, and high water production. The value ranges from 2 to 11. Instruments such as conductance and flow are equipped in the reverse osmosis device 7 .

The RO cleaning system 10 is a device for regularly cleaning the reverse osmosis device 7 . A solenoid valve 13 is installed on the pipeline between the high-pressure pump 6 and the RO cleaning system 10, and a solenoid valve 13a is installed on the pipeline between the reverse osmosis device 7 and the concentrated water outlet. 13a is connected. Therefore, the solenoid valve 13 and solenoid valve 13a are regularly opened by the PLC to perform low-pressure cleaning on the surface of the membrane module, flushing away the concentrated water in the membrane module, preventing scaling on the concentrated water side of the reverse osmosis membrane, and prolonging the cleaning cycle.

In order to detect the amount of pure water and concentrated water, flowmeters can be installed at the outlet of pure water and concentrated water.

When in use, start the raw water pump 2 first, start the high-pressure pump 6 after 10 seconds, start the electric slow-opening valve 2 seconds later, open the solenoid valve 13a at the same time, and start the antiscalant filling system. The raw water passes through the raw water tank 1, the raw water pump 2, enters the water inlet pipeline, and then passes through the filtration of the multimedia filter 3 and the activated carbon filter 4 to remove some impurities, and then adds appropriate antiscalant to the raw water through the antiscalant filling system. The scale agent, when passing through the security filter 5, removes some impurities again, and then enters the high-pressure pump 6 for pressurization. Most of the pressurized high-pressure water enters the reverse osmosis device 7 for thorough filtration, and the filtered pure water is stored in the pure water tank 8, and is input to the water use site through the pure water pump 9. Since the solenoid valve 13 is installed on the pipeline between the high-pressure pump 6 and the RO cleaning system 10, when the filter membrane in the reverse osmosis device 7 needs to be cleaned, the PLC sends an instruction to the solenoid valve 13, and the solenoid valve 13 is opened. The water passes through the RO cleaning system 10 to clean the reverse osmosis device 7, and at the same time opens the electromagnetic valve 13a at the concentrated water outlet, and the cleaned concentrated water containing a large amount of impurities is discharged from the concentrated water outlet. After the cleaning is completed, the PLC sends instructions to the solenoid valve 13, the solenoid valve 13 is closed, and the high-pressure water re-enters the reverse osmosis device 7 for filtering.

Claims (5)

1. reverse osmosis water purifier that can instead clean automatic control type, it is characterized in that: this device comprises raw water box (1), raw water pump (2), more medium filter (3), activated charcoal filter (4), the Scale inhibitors loading system, security personnel's strainer (5), high-pressure pump (6), reverse osmosis unit (7), pure water water tank (8), pure water pump (9), RO cleaning system (10) and PLC, wherein, raw water box (1), raw water pump (2), more medium filter (3), activated charcoal filter (4), the Scale inhibitors loading system, security personnel's strainers (5) are connected by back with water inlet line successively with high-pressure pump (6); The inlet end of high-pressure pump (6) and reverse osmosis unit (7), RO cleaning system (10) are connected respectively, the exit end of reverse osmosis unit (7) is connected with pure water water tank (8), pure water pump (9) in turn by the water outlet pipeline, and pure water pump (9) is connected the pure water outlet; RO cleaning system (10) is connected the back and connects dense water out with reverse osmosis unit (7); Raw water box (1) inlet end is equipped with former water motorized valve (11), liquidometer (12,12a) is housed respectively in raw water box (1) and the pure water water tank (8), be separately installed with magnetic valve (13,13a) on pipeline between high-pressure pump (6) and the RO cleaning system (10) and the pipeline between reverse osmosis unit (7) and the dense water out, described liquidometer (12,12a) is connected with the input terminus of PLC, and the output terminal of PLC is connected with former water motorized valve (11), raw water pump (2), pure water pump (9), magnetic valve (13,13a) respectively.

2. the reverse osmosis water purifier that can instead clean automatic control type according to claim 1 is characterized in that: described high-pressure pump (6) inlet end is equipped with low-voltage protective switch, and exit end is equipped with the high voltage protective switch.

3. the reverse osmosis water purifier that can instead clean automatic control type according to claim 1 is characterized in that: described high-pressure pump (6) exit end is equipped with drives motorized valve (14) slowly.

4. the reverse osmosis water purifier that can instead clean automatic control type according to claim 1, it is characterized in that: described Scale inhibitors loading system comprises liquor box (15), volume pump (16), volume pump (16) is connected with liquor box (15) pipeline, and liquor box (15) is connected with back with water inlet line.

5. the reverse osmosis water purifier that can instead clean automatic control type according to claim 1 is characterized in that: described pure water exit and dense water out place all are equipped with under meter.

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