Integrated nanofiltration water purifier

Abstract

The utility model provides an integrated nanofiltration water purifier, which belongs to the technical field of water treatment and comprises an ultrafiltration membrane filter, a front granular active carbon filter, a polypropylene melt-blowing filter, a nanofiltration high-pressure pump, a nanofiltration membrane component, a rear granular active carbon filter and a water tank which are sequentially communicated through pipelines, a first polypropylene folding filter is also arranged between the rear granular active carbon filter and the water tank; and an ultraviolet sterilizer and a constant-pressure water supply pump are arranged on the water supply pipeline between the water tank and the water supply pipe network. After municipal tap water is treated by the integrated nanofiltration water purifier provided by the utility model, the effluent quality can meet the requirements of Water Quality Standard for Purified Water for Drinking (CJ94-2005), and the taste of the effluent quality can be improved through the rear granular active carbon, so that the water is sweet and delicious, the water quality is improved, and the satisfaction degree of a user is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment, and particularly relates to an integrated nanofiltration water purifier. Background Art

[0002] At present, with the improvement of people's living standards, the demand for direct drinking water has increased significantly, and the direct drinking water supply technology has been continuously developed. Although the existing direct drinking water treatment technologies such as nanofiltration, ultrafiltration, and reverse osmosis can meet the basic requirements of the "Drinking Water Quality Standard" (CJ94-2005) for the quality of the effluent, they still cannot meet the needs of users for high-quality water; secondly, the layout of the current direct drinking water purifiers is not compact enough, and the occupied area needs to be considered when they are arranged in public areas such as existing or under-construction communities, schools, and shopping malls. Therefore, there is also a need to provide an intensive water purifier. Summary of the Utility Model

[0003] An embodiment of the utility model provides an integrated nanofiltration water purifier, aiming to solve the higher requirements of users for water quality.

[0004] To achieve the above object, the technical solution adopted by the utility model is: to provide an integrated nanofiltration water purifier, including: an ultrafiltration membrane filter, a pre-filter granular activated carbon filter, a polypropylene meltblown filter, a nanofiltration high-pressure pump, a nanofiltration membrane module, a post-filter granular activated carbon filter, and a water tank, which are connected in sequence through pipelines; a first polypropylene folded filter is further arranged between the post-filter granular activated carbon filter and the water tank, and an ultraviolet disinfection device and a constant pressure water supply pump are arranged on the water supply pipeline between the water tank and the water supply network.

[0005] In an implementable manner, an ozone generator is further included, the ozone generator is used to convey ozone into the water tank, and the water tank is further connected to the end of the water supply network through a return pipe.

[0006] In an implementable manner, two-stage series-connected pre-filter granular activated carbon filters are included.

[0007] In an implementable manner, two groups of ultrafiltration membrane filters arranged in parallel on the pipeline are included, and the two groups of ultrafiltration membrane filters are respectively controlled by valves and can be used alternately.

[0008] In an implementable manner, two constant pressure water supply pumps arranged in parallel on the pipeline are included and can be used alternately.

[0009] In an implementable manner, it further includes a bottom plate, and the ultrafiltration membrane filter, the pre-filter granular activated carbon filter, the polypropylene meltblown filter, the nanofiltration high-pressure pump, the nanofiltration membrane module, the post-filter granular activated carbon filter, the first polypropylene pleated filter, the second polypropylene pleated filter, the ultraviolet disinfection device, the constant-pressure water supply pump and the ozone generator are integrated on the bottom plate in four rows.

[0010] In an implementable manner, the pre-filter granular activated carbon filter, the ozone generator and the control cabinet are arranged adjacent to each other in the first row; the nanofiltration membrane module, the constant-pressure water supply pump and the nanofiltration high-pressure pump are arranged in the second row; the ultrafiltration membrane filter and the polypropylene meltblown filter are arranged in the third row; the first polypropylene pleated filter and the second polypropylene pleated filter are arranged in the fourth row, and the ultraviolet disinfection device is arranged close to the water tank.

[0011] In an implementable manner, the nanofiltration membrane module and the ultrafiltration membrane filter are parallel and both are arranged vertically.

[0012] In an implementable manner, the constant-pressure water supply pump is arranged close to the water tank.

[0013] The integrated nanofiltration water purifier provided by the present utility model, compared with the prior art, has the beneficial effects that: taking municipal tap water as the raw water, first passing through the ultrafiltration membrane filter to filter out suspended particles, colloids and some bacteria and viruses in the water, the pre-filter granular activated carbon filter adsorbs organic matters and residual chlorine in the water, further filtering out impurities leaked through the previous stage by the polypropylene meltblown filter, and then entering the nanofiltration high-pressure pump; the nanofiltration high-pressure pump pressurizes the influent water to the osmotic pressure required by the nanofiltration membrane module, and utilizes the selective permeability of the membrane to intercept organic matters, bacteria and most metal salts, the produced water passes through the post-filter granular activated carbon filter to improve the taste, and then enters the stainless steel water tank, and after being treated by the ultraviolet disinfection device, it is transported to users. After such treatment of the municipal tap water, the quality of the effluent water can not only meet the requirements of the "Drinking Water Quality Standard" (CJ94-2005), but also improve the taste of the effluent water quality through the post-filter granular activated carbon, making the water sweet and delicious, improving the quality of the water and enhancing the satisfaction of users. Description of the Drawings

[0014] Figure 1 It is the front view structural schematic diagram of the integrated nanofiltration water purifier provided by the embodiment of the present utility model;

[0015] Figure 2 It is the side view structural schematic diagram of the integrated nanofiltration water purifier provided by the embodiment of the present utility model;

[0016] Figure 3 It is the rear view structural schematic diagram of the integrated nanofiltration water purifier provided by the embodiment of the present utility model;

[0017] Figure 4 This is a top - view structural schematic diagram of the integrated nanofiltration water purifier provided by the embodiment of the present utility model;

[0018] Explanation of the reference numerals in the drawings:

[0019] 1. Ultrafiltration membrane filter; 2. Pre - filter granular activated carbon filter; 3. Bottom plate; 4. Polypropylene melt - blown filter; 5. Nanofiltration high - pressure pump; 6. Nanofiltration membrane module; 7. Post - filter granular activated carbon filter; 8. First polypropylene folded filter; 9. Water tank; 10. Ultraviolet disinfection device; 11. Constant - pressure water supply pump; 12. Second polypropylene folded filter; 13. Ozone generator; 14. Control cabinet. Specific embodiments

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0021] Please refer to Figures 1 to 4 , and now the integrated nanofiltration water purifier provided by the present utility model will be described. The integrated nanofiltration water purifier includes: an ultrafiltration membrane filter 1, a pre - filter granular activated carbon filter 2, a polypropylene melt - blown filter 4, a nanofiltration high - pressure pump 5, a nanofiltration membrane module 6, a post - filter granular activated carbon filter 7 and a water tank 9 that are connected in sequence through pipelines; a first polypropylene folded filter 8 is further provided between the post - filter granular activated carbon filter 7 and the water tank 9, and an ultraviolet disinfection device 10 and a constant - pressure water supply pump 11 are provided on the water supply pipeline between the water tank 9 and the water supply network.

[0022] Compared with the prior art, the beneficial effects of the integrated nanofiltration water purifier provided by the present utility model are as follows: Taking municipal tap water as the raw water, first passing through the ultrafiltration membrane filter 1 to filter out suspended particles, colloids and some bacteria and viruses in the water, the pre - filter granular activated carbon filter 2 adsorbs organic matters and residual chlorine in the water, further filtering out impurities leaked through the previous stage by the polypropylene melt - blown filter 4, and then entering the nanofiltration high - pressure pump 5; the nanofiltration high - pressure pump 5 pressurizes the influent water to the osmotic pressure required by the nanofiltration membrane module 6, and using the selective permeability of the membrane, intercepts organic matters, bacteria and most metal salts. The produced water passes through the post - filter granular activated carbon filter 7 to improve the taste, and then enters the stainless - steel water tank 9. After being further treated by the ultraviolet disinfection device 10, it is transported to users. After such treatment of municipal tap water, the quality of the effluent water can not only meet the requirements of the "Drinking Water Quality Standard" (CJ94 - 2005), but also improve the taste of the effluent water through the post - filter granular activated carbon, making the water sweet and delicious, improving the quality of the water and enhancing the satisfaction of users.

[0023] In this application, the ultrafiltration membrane filter 1 mainly filters out particulate matter and suspended solids in water, prevents the particulate matter and suspended solids in water from clogging the membrane module, reduces the SDI value of municipal tap water, makes the water quality meet the requirements of the nanofiltration membrane element for the influent water, and plays a protective role for the nanofiltration membrane element. The filter medium of the ultrafiltration membrane filter 1 is the ultrafiltration membrane element.

[0024] The pre-filter granular activated carbon filter 2 in this application adopts a two-stage series mode to improve the treatment effect. The main functions of the pre-filter granular activated carbon filter 2 are: adsorbing about 60% of the organic matter in water; adsorbing the residual chlorine in water; further purifying inorganic colloids, organic colloids and dissolved organic macromolecular impurities to make them meet the nanofiltration influent index. The filter medium of the pre-filter granular activated carbon filter 2 is granular activated carbon.

[0025] The function of the polypropylene melt-blown filter 4 is to intercept particles larger than 5μm in the water quality of the effluent from the ultrafiltration membrane filter 1 and the pre-filter granular activated carbon filter 2. Such particles may penetrate the nanofiltration membrane module 6 after being pressurized by the nanofiltration high-pressure pump 5, causing salt leakage, and at the same time preventing the impeller of the nanofiltration booster pump from being scratched.

[0026] The function of the nanofiltration high-pressure pump 5 is to provide sufficient influent pressure for the nanofiltration membrane module 6 to ensure the normal operation of the nanofiltration membrane. According to the characteristics of nanofiltration itself, a certain driving force is required to overcome resistance such as osmotic pressure to ensure the designed water production. Pressure is the driving force for the operation of the nanofiltration membrane module 6. In order to ensure the long-term stable water production of the nanofiltration membrane module 6, a low-pressure protection switch and a high-pressure protection switch should be installed at the inlet and outlet of the nanofiltration high-pressure pump 5. When the water supply pressure is insufficient and the inlet pressure of the nanofiltration high-pressure pump 5 is lower than a certain set value (normally 0.05MPa), it can automatically send a signal and interlock to stop the nanofiltration high-pressure pump 5 to protect the nanofiltration high-pressure pump 5 from idling; when the outlet pressure of the nanofiltration high-pressure pump 5 exceeds a certain set value due to misoperation for other reasons, the high-pressure protection switch at the outlet of the nanofiltration high-pressure pump 5 should be able to automatically interlock and cut off the power supply of the high-pressure pump to protect the system from operating under high pressure.

[0027] The nanofiltration membrane module 6 uses the highly selective permeability of the nanofiltration membrane to filter out most metal salts, organic matter, suspended solids, bacteria, etc. in water. The water is pressurized by the nanofiltration high-pressure pump 5 and enters the nanofiltration membrane module 6 installed in the nanofiltration membrane housing. Water molecules and a very small amount of small molecule organic matter pass through the membrane layer due to reverse osmotic pressure, are collected through the collection pipeline, enter the stainless steel water tank 9 after the taste is improved by the post-filter granular activated carbon filter 7, and the water that cannot pass through the nanofiltration membrane module 6 is discharged out of the system through the concentrated water pipe.

[0028] The function of the post-filter granular activated carbon filter 7 is to improve the taste of the effluent water quality through the post-filter granular activated carbon, making the water sweet and delicious.

[0029] The first polypropylene pleated filter 8 is a precision filter, which is set on the pipeline entering the water tank 9 and uses a 0.22 micron microporous pleated filter element to filter and intercept substances larger than 0.22 microns from the post-activated carbon water to keep the water entering the water tank 9 pure. The precision filter adopts the form of side inlet and bottom outlet, which is convenient for emptying the precision filter.

[0030] The water tank 9 is made of stainless steel and collects product water for drinking by customers.

[0031] The ultraviolet disinfector 10 is a built-in ultraviolet lamp. The ultraviolet wavelength in the range of 240 to 280 nm is most effective in destroying the molecular structure of DNA (deoxyribonucleic acid) or RNA (ribonucleic acid) in bacteria and viruses, causing growth cell death and (or) regenerative cell death, thereby achieving the effect of sterilization and disinfection; it mainly performs further sterilization and disinfection treatment on the water outlet of the water tank 9.

[0032] The constant pressure water supply pump 11 can be replaced according to the customer's water demand. The function of the constant pressure water supply pump 11 is to work under the set pressure and deliver the direct drinking water that meets the customer's needs to the water point. The constant pressure water supply pump 11 of this device adopts frequency conversion control. The constant pressure water supply pump 11 is an integrated structure, which has the characteristics of reliability, maturity, stable operation, low operating cost, minimal management and maintenance, high degree of automation, high degree of integration, small footprint, and convenient operation and maintenance.

[0033] See also Figures 1 to 4 The nanofiltration water purifier provided by the utility model also includes an ozone generator 13, which is used to transport ozone into the water tank 9. The water tank 9 is also connected to the end of the water supply network through a return pipe. The ozone generator 13 absorbs ozone and adds it to the water tank 9 through a small cycle established by a constant pressure water supply pump 11, a pressure reducing valve and a water ejector, thereby achieving the purpose of disinfecting the water tank 9 and the water supply network.

[0034] The constant pressure water supply system of the present application adopts a dual disinfection mode of an ultraviolet disinfector 10 and an ozone generator 13. In addition to disinfecting the water tank 9, it also takes effective disinfection measures for the water supply network; and takes measures to achieve ozone disinfection while also effectively solving the impact of ozone on the taste of direct drinking water.

[0035] The water in the water tank 9 is sterilized by the ultraviolet sterilizer and then boosted by the constant pressure water supply pump 11, and then delivered to the customer's point of use at a constant pressure through a pressure tank (not shown in the figure). When the system requires ozone sterilization, the ozone generator 13 is started to deliver ozone to the water tank 9; when the ozone concentration in the water tank 9 reaches the disinfection concentration, the ultraviolet sterilizer is turned off to disinfect the pipeline; after the disinfection is completed, the residual ozone in the system is eliminated and decomposed by the ultraviolet sterilizer.

[0036] Among them, comprehensive water quality monitoring is set at the end of the return water to real-time monitor water quality indicators such as permanganate index (COD Mn , calculated as O2), turbidity, total dissolved solids (TDS), temperature, etc. in the direct drinking water supply system.

[0037] The purification water supply system is fully automatic control, only need to be regularly inspected, without daily manual operation. According to the signal of the liquid level sensor on the water tank 9, it can realize automatic start / stop according to the liquid level. The water quality of the outlet water can be displayed by the on-line instrument. It operates stably under the set operating pressure of the system, and displays and alarms the faults of each component of the system; the pipeline direct drinking water of the system adopts sanitary grade stainless steel pipe fittings and valves, and the pipeline does not rust, which can effectively prevent the water from being polluted again and ensure the water quality.

[0038] In some embodiments, as Figures 1 to 4 shown, a second polypropylene folded filter 12 is provided on the return water pipe. A second polypropylene folded filter 12 is set on the return water pipeline as a fine filter, which uses a 0.22-micron microporous folded filter element to filter, intercepts substances larger than 0.22 microns in the circulating water in the pipe network, and keeps the return water pure.

[0039] As Figures 1 to 4 shown, the nanofiltration water purifier provided by the present utility model further includes two-stage series-connected pre-filter granular activated carbon filters 2.

[0040] As Figures 1 to 4 shown, the nanofiltration water purifier provided by the present utility model includes two groups of ultrafiltration membrane filters 1 arranged in parallel on the pipeline. The two groups of ultrafiltration membrane filters 1 are respectively controlled by valves and can be used alternately. Each of the two groups of ultrafiltration membrane filters 1 has two branches. The two groups rotate in operation, one for use and one for standby. The rotation time is determined according to the water production working conditions. Each time the water tank 9 is filled with water and the water production stops, the ultrafiltration membrane is backwashed, and the next group of membranes is rotated to the working duty state. During backwashing, the backwashing water source of each group of ultrafiltration membrane filters 1 is the ultrafiltration produced water of the other group. When the water production electric valve MV105 is closed, the nanofiltration high-pressure pump 5 and the nanofiltration high-pressure pump 5 inlet electric valve MV201 are closed at the same time to stop the nanofiltration water production.

[0041] As Figures 1 to 4As shown in the figure, the nanofiltration water purifier provided by the present utility model includes two constant pressure water supply pumps 11 arranged in parallel on the pipeline and can be used alternately. There are 2 constant pressure water supply pumps 11 in total, one in use and one in reserve. Usually, the 2 pumps run in rotation at regular intervals; a pressure sensor is provided at the outlet of the water supply pump group to adjust the pump speed according to the outlet pressure to maintain a constant working pressure of the system; when the water consumption is at a peak and the highest speed of one water pump still cannot meet the normal working pressure, the 2 pumps run simultaneously to achieve the purpose of constant pressure water supply; when the water pump maintains the outlet pressure at the set working pressure at the lowest speed, it is judged that there is no one using water in the system and the water pump stops running; when the outlet pressure is lower than the normal working pressure, the water pump starts to supply water again; when the water level in the water tank 9 is lower than the set water pump stop level, the constant pressure water supply pump 11 stops running, and the water pump can only be started when the water level in the water tank 9 is higher than the set water pump start level.

[0042] As Figures 1 to 4 As shown in the figure, the nanofiltration water purifier provided by the present utility model further includes a bottom plate 3. The ultrafiltration membrane filter 1, the pre-filter granular activated carbon filter 2, the polypropylene meltblown filter 4, the nanofiltration high-pressure pump 5, the nanofiltration membrane module 6, the post-filter granular activated carbon filter 7, the second polypropylene pleated filter 12, the first polypropylene pleated filter 8, the ultraviolet disinfection device 10, the constant pressure water supply pump 11 and the ozone generator 13 are integrated on the bottom plate 3 in four rows.

[0043] The pretreatment equipment such as the ultrafiltration membrane filter 1, the pre-filter granular activated carbon filter 2, and the polypropylene meltblown filter 4, the post-treatment equipment such as the nanofiltration membrane module 6, the post-filter granular activated carbon filter 7, the second polypropylene pleated filter 12, the first polypropylene pleated filter 8, and the ultraviolet disinfection device 10, as well as the constant pressure water supply system are all centrally arranged and fixed to a bottom plate 3 with an integral structure. Such a setting makes the structure compact, saves space, and is also convenient for centralized maintenance and management.

[0044] In some embodiments, as Figures 1 to 4 shown, the pre-filter granular activated carbon filter 2, the ozone generator 13 and the control cabinet 14 are arranged adjacent to each other in the first row; the nanofiltration membrane module 6, the constant pressure water supply pump 11 and the nanofiltration high-pressure pump 5 are arranged in the second row; the ultrafiltration membrane filter 1 and the polypropylene meltblown filter 4 are arranged in the third row; the first polypropylene pleated filter 8 and the second polypropylene pleated filter 12 are arranged in the fourth row, and the ultraviolet disinfection device 10 is arranged close to the water tank 9.

[0045] In some embodiments, as Figures 1 to 4 shown, the nanofiltration membrane module 6 and the ultrafiltration membrane filter 1 are arranged in parallel and both are arranged vertically; they can also be arranged in parallel and horizontally.

[0046] In some embodiments, as Figures 1 to 4As shown, the constant pressure water supply pump 11 is arranged close to the water tank 9, which can shorten the length of the pipeline used.

[0047] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For parts not detailed or recorded in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0048] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An integrated nanofiltration water purifier, characterized in that: include: An ultrafiltration membrane filter (1), a pre-granular activated carbon filter (2), a polypropylene melt-blown filter (4), a nanofiltration high-pressure pump (5), a nanofiltration membrane assembly (6), a post-granular activated carbon filter (7) and a water tank (9) are sequentially connected through pipelines; a first polypropylene folded filter (8) is also arranged between the post-granular activated carbon filter (7) and the water tank (9), and an ultraviolet disinfector (10) and a constant-pressure water supply pump (11) are arranged on the water supply pipeline between the water tank (9) and the water supply network.

2. The integrated nanofiltration water purifier according to claim 1, characterized in that: It also comprises an ozone generator (13), the ozone generator (13) being used to transport ozone into the water tank (9), and the water tank (9) is also connected to the end of the water supply network through a return pipe.

3. The integrated nanofiltration water purifier according to claim 2, characterized in that: It comprises two stages of pre-placed granular activated carbon filters (2) connected in series.

4. The integrated nanofiltration water purifier according to claim 1, characterized in that: It comprises two groups of ultrafiltration membrane filters (1) arranged in parallel on a pipeline. The two groups of ultrafiltration membrane filters (1) are respectively controlled by valves and can be used alternately.

5. The integrated nanofiltration water purifier according to claim 1, characterized in that: It comprises two constant pressure water supply pumps (11) which are arranged in parallel on the pipeline and can be used alternately.

6. The integrated nanofiltration water purifier according to claim 3, characterized in that: It also includes a bottom plate (3), wherein the ultrafiltration membrane filter (1), the front granular activated carbon filter (2), the polypropylene melt-blown filter (4), the nanofiltration high-pressure pump (5), the nanofiltration membrane assembly (6), the rear granular activated carbon filter (7), the second polypropylene folded filter (12), the first polypropylene folded filter (8), an ultraviolet disinfector (10), the constant pressure water supply pump (11) and the ozone generator (13) are integrated on the bottom plate (3) in four rows.

7. The integrated nanofiltration water purifier according to claim 6, characterized in that: The pre-granular activated carbon filter (2), the ozone generator (13) and the control cabinet (14) are arranged adjacent to each other in the first row; the nanofiltration membrane assembly (6), the constant pressure water supply pump (11) and the nanofiltration high-pressure pump (5) are arranged in the second row; the ultrafiltration membrane filter (1) and the polypropylene melt-blown filter (4) are arranged in the third row; the first polypropylene folded filter (8) and the second polypropylene folded filter (12) are arranged in the fourth row, and the ultraviolet disinfector (10) is arranged close to the water tank (9).

8. The integrated nanofiltration water purifier according to claim 7, characterized in that: The nanofiltration membrane assembly (6) and the ultrafiltration membrane filter (1) are arranged in parallel and upright.

9. The integrated nanofiltration water purifier according to claim 7, characterized in that: The constant pressure water supply pump (11) is arranged close to the water tank (9).

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