CN201722242U - Rural drinking water treatment equipment with reverse osmosis equipment and ultrafiltration equipment connected in parallel - Google Patents

Abstract

The utility model discloses a rural drinking water treatment device connected in parallel with reverse osmosis and ultrafiltration, which comprises a raw water tank, a dosing system, a raw water pump, a multi-media filter, an active carbon filter, a security filter, a water inlet solenoid valve, a reverse An osmosis device, an ultrafiltration device, a produced water tank, a water supply booster pump, a chlorine dioxide generator and a drinking water tower, and a reverse osmosis device and an ultrafiltration device are connected in parallel. One way of raw water enters the ultrafiltration device through the regulating valve. When the salt content, TOC, COD, etc. in the raw water exceed the standard, the other way of raw water enters the high-pressure pump through the switching ball valve to the reverse osmosis device, and finally collects into the produced water tank, and then passes through the water supply booster pump. , The chlorine dioxide generator enters the drinking water tower. The device of the utility model adopts reverse osmosis/ultrafiltration parallel process for low-salinity rural brackish water, and adjusts the flow ratio of the ultrafiltration device and the reverse osmosis device through a regulating valve, so that the quality of the produced water reaches The national drinking water standard meets the requirements of economy, practicality and convenient operation.

Description

A rural drinking water treatment device connected in parallel with reverse osmosis and ultrafiltration

technical field

The utility model relates to the field of water treatment, in particular to a rural drinking water treatment device connected in parallel with reverse osmosis and ultrafiltration.

Background technique

Low-salinity brackish water (<2000ppm) and brackish water (1000-10000ppm) have long endangered the health of residents in the vast rural areas of our country. In addition, the total amount of water resources in my country ranks sixth in the world, but the per capita water resources are only a quarter of the world average, and it is also one of the 21 water-poor countries in the world, especially in coastal islands and northwest regions. It is even more scarce, seriously affecting the local economic development and the quality of life of the people. According to statistics and forecasts, in recent years, my country's water consumption has been increasing, and the water gap has become larger and larger. However, brackish water is widely distributed in coastal islands, northwest and northeast regions. Therefore, how to treat brackish water into healthy water that meets the national drinking water standard is an urgent problem to be solved at present. The salt content in brackish water is different in different regions, and even in the same region, the water quality indicators vary greatly with the seasons. For example, the salt content, organic matter, algae, bacteria, etc. of flat reservoirs and mountain ponds in island areas vary greatly with the seasons , sometimes fresh water and sometimes brackish water.

At present, brackish water treatment technologies mainly include: electrodialysis and reverse osmosis. Electrodialysis uses ion exchange membranes to separate anions and cations in brine under the action of an electric field, thereby reducing the salt concentration in the fresh water chamber and obtaining fresh water. The cost is high, and the desalination rate is not high, the raw water utilization rate is low, the equipment is easy to leak, and the organic pollutants cannot be removed. Reverse osmosis is a membrane separation technology driven by high pressure. It has excellent interception performance for salt ions, organic pollutants and microorganisms, and has the advantages of high degree of automation, stable operation, low desalination cost, wide application range and good effluent quality. Compared with the partial desalination nanofiltration membrane, the investment cost is low, and the source of the membrane is wide. Because the salinity of flat reservoirs and mountain ponds in island areas varies greatly with the rainy season and dry season, sometimes it is fresh water and sometimes it is brackish water. Therefore, it is difficult to meet the needs of rural drinking water treatment equipment by simply using high-pressure driven high-energy reverse osmosis. Economical and practical requirements.

Ultrafiltration is a membrane filtration technology driven by low pressure, which can efficiently intercept macromolecular organic matter, colloids, suspended solids, and microorganisms in raw water, but cannot remove soluble small molecules and ions, and has no ability to treat brackish water. Ultrafiltration can be used for the purification of high turbidity fresh water, and it is an economical and practical technology for rural drinking water treatment.

With the continuous development of membrane science and technology, the use of efficient and economical membrane integration technology to purify and treat brackish water will be an important direction for the future development of rural drinking water treatment technology.

Contents of the invention

The utility model provides a rural drinking water treatment device connected in parallel with reverse osmosis and ultrafiltration. Drinking water that meets national standards.

A rural drinking water treatment device with reverse osmosis and ultrafiltration in parallel, including raw water tank, dosing system, raw water pump, multi-media filter, activated carbon filter, security filter, water inlet solenoid valve, reverse osmosis device, ultrafiltration device, produced water tank, water supply booster pump, chlorine dioxide generator and drinking water tower.

The raw water tank, raw water pump, multi-media filter, activated carbon filter, security filter and water inlet solenoid valve are connected in sequence. The outlet of the dosing system is connected between the raw water tank and the raw water pump. reverse osmosis and ultrafiltration.

The pipeline where the reverse osmosis device is located is equipped with a switching ball valve and a high-pressure pump, and the opening and closing of the reverse osmosis device can be controlled by switching the ball valve. The parallel pipeline where it is located is equipped with a regulating valve and a water production solenoid valve, through which the flow ratio of the water to be treated entering the reverse osmosis device and the ultrafiltration device can be adjusted.

The parallel pipeline of the reverse osmosis device and the ultrafiltration device is sequentially connected with the water production tank, the water supply booster pump and the drinking water tower, and the outlet of the chlorine dioxide generator is also connected between the water supply booster pump and the drinking water tower.

A backwashing device can also be installed between the ultrafiltration device and the produced water tank, and the backwashing device includes an ultrafiltration discharge solenoid valve, an unqualified water discharge solenoid valve and a backwash pump. When the backwashing device is installed, the pipeline from the produced water tank is divided into two paths, one path is connected to the water supply booster pump and the drinking water tower, and the outlet of the chlorine dioxide generator is connected between the water supply booster pump and the drinking water tower ;The other branch road is equipped with a backwash pump, which is connected between the ultrafiltration device and the produced water solenoid valve; the inlet of the unqualified water discharge solenoid valve is connected between the produced water solenoid valve and the ultrafiltration device; the ultrafiltration discharge solenoid valve The inlet is connected to the water production pipeline of the ultrafiltration device; the security filter, high pressure pump, reverse osmosis device, ultrafiltration device and automatic control box are collectively installed in the same area.

Raw water is poured into the raw water tank through the water pump. There is a high and low liquid level controller in the raw water tank. When the high liquid level is reached, the raw water pump is started, and the dosing system is also started at the same time. The antiscalant is injected into the pipeline and mixed with the antiscalant. Raw water enters the multi-media filter to filter out suspended matter and larger solid particles in the water. The head of the multi-media filter is equipped with a device for regular forward flushing and backflushing that can be set. The water from the multi-media filter enters the activated carbon filter for further filtration to remove some small suspended solids or microorganisms that were not removed in the previous step. The activated carbon filter is also equipped with a settable regular positive flushing and backflushing. device. Then the water from the activated carbon filter enters the security filter for further and more secure filtration. At this time, the water inlet solenoid valve is opened, and the water in the pipeline is divided into two paths. The valve enters the ultrafiltration device, and the ratio of water entering the reverse osmosis device and the ultrafiltration device can be adjusted by adjusting the switching ball valve and the regulating valve. When the water level of the raw water tank is lower than the low level controller, the device automatically closes the water inlet solenoid valve and the raw water pump, and starts to inject raw water into the raw water tank at the same time. The water exiting the ultrafiltration device passes through the produced water solenoid valve and is combined with the water exiting the reverse osmosis unit before entering the produced water tank. When the produced water tank reaches a high water level, the produced water solenoid valve, water inlet solenoid valve, high-pressure pump and raw water pump will be closed , stop adding raw water into the raw water tank. Part of the water in the produced water tank can be backwashed by the ultrafiltration device through the backwash pump; the other part of the water enters the drinking water tower through the water supply booster pump, and at the same time, the chlorine dioxide generator will regularly inject chlorine dioxide according to the flow rate. When the water level in the produced water tank is lower than the low water level controller, the water supply booster pump will be closed, and the produced water solenoid valve, water inlet solenoid valve, high pressure pump, and raw water pump will be turned on, and at the same time, raw water will be injected into the raw water tank. When the drinking water tower is higher than the high water level, the water supply booster pump will be automatically turned off.

When the device of the utility model is equipped with a backwashing device, in the positive flushing state: the raw water pump, the water inlet electromagnetic valve, the regulating valve, the switching ball valve, the reverse osmosis forward flushing electromagnetic valve and the ultrafiltration discharge electromagnetic valve are opened, and the unqualified water discharge electromagnetic valve, produced water solenoid valve and backwash pump are closed, and the water after positive flushing is discharged from reverse osmosis positive flushing solenoid valve and ultrafiltration discharge solenoid valve respectively. In the state of backwashing: switching ball valve, raw water pump, water inlet solenoid valve, regulating valve, produced water solenoid valve and unqualified water discharge solenoid valve are closed, ultrafiltration discharge solenoid valve and backwash pump are opened, and the water after backwashing is UF discharge solenoid valve discharge. The backwashing device can effectively reduce membrane fouling and prolong the service life of the membrane.

When the device of the utility model is in operation, when the water quality in the ultrafiltration outlet pipe is very poor, the electromagnetic valve for producing water can be closed, and the electromagnetic valve for discharging unqualified water can be opened to discharge the water with poor water quality from the electromagnetic valve for discharging unqualified water.

At the same time, the utility model can also centrally control the entire water treatment device by setting a centralized control box. Two operating modes, manual control and automatic control, are set in the centralized control box, which is more convenient for the operator to operate the device and make the device operate more flexible.

In the device of the utility model, the security filter, the high-pressure pump, the reverse osmosis device, the ultrafiltration device and the automatic control box can be installed in the same area, which greatly reduces the occupied area.

The regular forward flushing and backflushing devices in the device of the utility model can respectively prolong the service life of the reverse osmosis membrane in the reverse osmosis device and the ultrafiltration membrane in the ultrafiltration device, greatly reducing the use cost of the equipment.

The device of the utility model connects the ultrafiltration device and the reverse osmosis device in parallel to process the pretreated low-salt surface brackish water or brackish water, which can be adjusted according to the different salinity in different seasons and the different salinity in raw water in different regions. Switching ball valves and regulating valves before the reverse osmosis device and the ultrafiltration device, so as to achieve the purpose of saving energy and obtaining suitable drinking water; through the parallel connection of the ultrafiltration device and the reverse osmosis device to treat low-salinity brackish water and rural drinking water , can fully meet the drinking water standard, and produce healthy water that is suitable for residents to drink and meets the national drinking water standard.

The rural drinking water purification equipment of the utility model is easy to use, occupies a small area, is low in cost, easy to maintain, economical and practical, and can adopt automatic and manual control methods, which solves the problem of coastal areas, island areas and western areas. Long-term drinking of low-salt brackish water and brackish water in rural areas.

Description of drawings

Fig. 1 is the schematic diagram of the utility model reverse osmosis and ultrafiltration parallel rural drinking water treatment device.

Detailed ways

As shown in Figure 1, a rural drinking water treatment device with reverse osmosis and ultrafiltration in parallel, including a raw water tank 1, a dosing system 2, a raw water pump 3, a multimedia filter 4, an activated carbon filter 5, and a security filter 6 , water inlet solenoid valve 7, reverse osmosis device 10, ultrafiltration device 15, water production tank 17, water supply booster pump 18, chlorine dioxide generator 20 and drinking water tower 21.

The raw water tank 1, the raw water pump 3, the multimedia filter 4, the activated carbon filter 5, the security filter 6 and the water inlet solenoid valve 7 are connected in sequence, and the outlet of the dosing system 2 is connected between the raw water tank 1 and the raw water pump 3. Drug system 2 and raw water pump 3 linkage control; reverse osmosis device 10 and ultrafiltration device 15 installed in parallel are connected behind water inlet solenoid valve 7, switching ball valve 8 and high-pressure pump 9 are installed in front of reverse osmosis device 10, and its concentrated water outlet A reverse osmosis forward solenoid valve 14 is installed on the pipeline; a regulating valve 11 is installed before the ultrafiltration device 15, and an unqualified water discharge solenoid valve 13 and a produced water solenoid valve 16 are successively installed after the ultrafiltration device 15; A backwashing device is installed between the produced water tanks 17, and the backwashing device includes an ultrafiltration discharge electromagnetic valve 12 and a backwashing pump 18.

The reverse osmosis device 10 and the ultrafiltration device 15 are connected in parallel to the water production tank 17, and the pipeline coming out of the water production tank 17 is divided into two roads, one road is connected to the water supply booster pump 18 and the drinking water tower 21, and the outlet of the chlorine dioxide generator 20 Connected between the water supply booster pump 18 and the drinking water tower 21; the other branch road is equipped with a backwash pump 19, which is connected between the ultrafiltration device 15 and the water production solenoid valve 16, and the water production solenoid valve 16 and the ultrafiltration device The pipeline between 15 is also connected with the inlet of unqualified water discharge solenoid valve 13; the inlet of ultrafiltration discharge solenoid valve 12 is connected on the water production pipeline of ultrafiltration device 15; wherein security filter 6, high pressure pump 9, reverse osmosis device 10. The ultrafiltration device 15 and the automatic control box are installed in the same area.

Raw water is poured into the raw water tank 1 through the water pump. There is a high and low liquid level controller in the raw water tank 1. When the high liquid level is reached, the raw water pump 3 is started, and the dosing system 2 is also started at the same time, and the antiscalant is injected into the pipeline, mixed into the The raw water of the antiscalant enters the multimedia filter 4 to filter out suspended solids and larger solid particles in the water, and the head of the multimedia filter 4 is equipped with a settable regular positive flushing and backflushing device. The water coming out of the multimedia filter 4 enters the activated carbon filter 5 for further filtration to remove some small suspended solids or microorganisms that were not removed in the previous step. Similarly, the activated carbon filter 5 is also equipped with regular positive flushing and backflushing that can be set. Then the water coming out of the activated carbon filter 5 enters the security filter 6 for further and more secure filtration. At this time, the water inlet solenoid valve 7 is opened, and the water in the pipeline is divided into two paths, one of which passes through the switching ball valve 8 and the high pressure pump 9. The reverse osmosis device 10; the other way enters the ultrafiltration device 15 through the regulating valve 11. The proportion of water entering the reverse osmosis device and the ultrafiltration device can be adjusted by adjusting the switching ball valve 8 and the regulating valve 11 . When the water level of the raw water tank 1 was lower than the low level controller, the device automatically closed the water inlet solenoid valve 7 and the raw water pump 3, and simultaneously injected raw water into the raw water tank 1. The water from the ultrafiltration device 15 enters the water production tank 17 after being collected with the water from the reverse osmosis device 10 through the water production solenoid valve 16. When the water production tank 17 reaches a high water level, the water production solenoid valve 16, the water inlet solenoid valve 7, The high-pressure pump 9 and the raw water pump 3 will be closed, and stop entering the raw water in the raw water tank 1. Part of the water in the produced water tank 17 can be backwashed by the ultrafiltration device 15 through the backwashing device; into chlorine dioxide. When the water level in the produced water tank 17 was lower than the low water level controller, the water supply booster pump 18 would be closed, and the produced water solenoid valve 16, the water inlet solenoid valve 7, the high-pressure pump 9, and the raw water pump 3 would be turned on, and the raw water pump 1 would be supplied to the raw water tank 1 simultaneously. Into the raw water, and when the drinking water tower 21 was higher than the high water level controller, the water supply booster pump 18 will be automatically closed.

In the state of positive flushing: the raw water pump 3, the water inlet solenoid valve 7, the regulating valve 11, the switching ball valve 8, the reverse osmosis positive flushing solenoid valve 14 and the ultrafiltration discharge solenoid valve 12 are opened, the unqualified water discharge solenoid valve 13, the produced water solenoid valve The valve 16 and the backwash pump 19 are closed, and the flushed water is discharged from the reverse osmosis forward flushing solenoid valve 14 and the ultrafiltration discharge solenoid valve 12 respectively; in the backwashing state, switch the ball valve 8, the raw water pump 3, and the water inlet solenoid valve 7 , regulating valve 11, produced water solenoid valve 16 and unqualified water discharge solenoid valve 13 are closed, ultrafiltration discharge solenoid valve 12 and backwash pump 19 are opened, and the water after backwashing is discharged from the flow discharge solenoid valve 12; the backwash device can be Effectively reduce membrane fouling, prolong the service life of the membrane, and greatly reduce the cost of equipment use.

When the water quality on the ultrafiltration outlet pipeline is very poor, the produced water solenoid valve 16 and the ultrafiltration discharge solenoid valve 12 are closed, the unqualified water discharge solenoid valve 13 is opened, and the water with poor water quality is discharged from the unqualified water discharge solenoid valve 13.

The circuit of this device is also equipped with a centralized control box, which provides manual and automatic operation options, which can not only carry out automatic control but also manual control, which also greatly increases the convenience of operation and reduces the labor intensity of the operator. .

The whole device can automatically complete the tasks of water intake, water production, disinfection and flushing, which greatly reduces the labor intensity of the operator.

Claims (5)

1. the rural drinking water processing device of reverse osmosis and ultrafiltration parallel, comprise raw water box (1), medicine system (2), raw water pump (3), more medium filter (4), activated charcoal filter (5), security personnel's strainer (6), entering water electromagnetic valve (7), reverse osmosis unit (10), ultra-filtration equipment (15), produce water tank (17), water supply topping-up pump (18), chlorine dioxide generator (20) and drink water tower (21), it is characterized in that: raw water box (1), raw water pump (3), more medium filter (4), activated charcoal filter (5), security personnel's strainers (6) are connected successively with entering water electromagnetic valve (7), the outlet of medicine system (2) is connected between raw water box (1) and the raw water pump (3), medicine system (2) and raw water pump (3) interlock control, be connected with the reverse osmosis unit (10) and the ultra-filtration equipment (15) that are installed in parallel behind the entering water electromagnetic valve (7), reverse osmosis unit (10) in parallel is connected product water tank (17) successively with ultra-filtration equipment (15) back, water supply topping-up pump (18) and drink water tower (21), the outlet of chlorine dioxide generator (20) is connected water supply topping-up pump (18) and drinks between the water tower (21).

2. the rural drinking water processing device of reverse osmosis according to claim 1 and ultrafiltration parallel is characterized in that: preceding being equipped with of described reverse osmosis unit (10) switched ball valve (8) and high-pressure pump (9);

3. the rural drinking water processing device of reverse osmosis according to claim 1 and ultrafiltration parallel is characterized in that: the preceding variable valve (11) that is equipped with of described ultra-filtration equipment (15), ultra-filtration equipment (15) back are equipped with and produce water solenoid valve (16).

4. the rural drinking water processing device of reverse osmosis according to claim 1 and ultrafiltration parallel is characterized in that: between described ultra-filtration equipment (15) and the product water tank (17) the backwash device is housed.

5. the rural drinking water processing device of reverse osmosis according to claim 4 and ultrafiltration parallel, it is characterized in that: described backwash device comprises ultrafiltration discharge solenoid valve (12), defective water discharge solenoid valve (13), reverse osmosis square impact discharge solenoid valve (14) and backwashing pump (19), the pipeline that comes out from product water tank (17) is divided into two the tunnel, one the tunnel connects water supply topping-up pump (18) and drinks water tower (21), and the outlet of chlorine dioxide generator (20) is connected water supply topping-up pump (18) and drinks between the water tower (21); Backwashing pump (19) is housed on another branch road, is connected between ultra-filtration equipment (15) and the product water solenoid valve (16), the import of defective water discharge solenoid valve (13) is connected produces between water solenoid valve (16) and the ultra-filtration equipment (15); The import of ultrafiltration discharge solenoid valve (12) is connected on ultra-filtration equipment (15) the water producing pipe road.

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