CN215756857U - Multi-media filter of purified water unit - Google Patents

Abstract

The application discloses a multi-media filter of a purified water unit, which comprises a raw water tank, a pretreatment system, an activated carbon filter and a first water storage tank which are sequentially communicated through a pipeline, wherein a TOC sensor connected with a controller through a signal is arranged in the first water storage tank, and the first water storage tank is communicated with a water inlet end of the activated carbon filter through a first pipeline with a first pump; the first water storage tank is also sequentially communicated with a first-stage reverse osmosis membrane filter and a second water storage tank, a first conductivity sensor is arranged in the second water storage tank, and the second water storage tank is communicated with the water inlet end of the first-stage reverse osmosis membrane filter through a second pipeline with a second pump; the second water storage tank is sequentially communicated with a PH value adjusting device and a third water storage tank, a first PH value sensor is arranged in the third water storage tank, and the third water storage tank is communicated with a water inlet end of the PH value adjusting device through a third pipeline with a third pump. The pH value, the conductivity and the total organic carbon value of the prepared purified water meet the requirements through the real-time detection of each sensor.

Description

Multi-media filter of purified water unit

Technical Field

The application relates to the technical field of purified water preparation, in particular to a multi-media filter of a purified water unit.

Background

Purified water is an extremely important raw material for pharmaceutical production. The preparation of purified water in the pharmaceutical industry requires the control of the pH value, the conductivity, the total organic carbon and the like of the purified water, but the existing purified water preparation system cannot maintain the control of each concentration value of the prepared purified water for a long time, so that the pH value, the conductivity or the total organic carbon and the like of part of the prepared purified water exceed the standard, and further the quality of the prepared medicine is insufficient.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solve at least one of the above technical problems in the related art to some extent, and therefore, the present invention provides a multimedia filter for a purified water unit, in which a TOC sensor, a first conductivity sensor and a first PH sensor are respectively disposed at water outlets of corresponding treatment devices to ensure that the PH, the conductivity and the total organic carbon value of the finally prepared purified water meet requirements.

The technical scheme of the utility model is realized as follows:

a multi-media filter of a purified water unit comprises a raw water tank, wherein an outlet of the raw water tank is communicated with a pretreatment system, a water outlet end of the pretreatment system is communicated with an activated carbon filter, a water outlet end of the activated carbon filter is communicated with a first water storage tank, a TOC sensor is arranged in the first water storage tank, the TOC sensor is in signal connection with a controller, a first water outlet end of the first water storage tank is communicated with a water inlet end of the activated carbon filter through a first pipeline, and a first pump in signal connection with the controller is arranged on the first pipeline; the second water outlet end of the first water storage tank is communicated with a first reverse osmosis membrane filter, the water outlet end of the first reverse osmosis membrane filter is communicated with a second water storage tank, a first conductivity sensor in signal connection with the controller is arranged in the second water storage tank, the first water outlet end of the second water storage tank is communicated with the water inlet end of the first reverse osmosis membrane filter through a second pipeline, and a second pump in signal connection with the controller is arranged on the second pipeline; the second water outlet end of the second water storage tank is communicated with a PH value adjusting device, the water outlet end of the PH value adjusting device is communicated with a third water storage tank, a first PH value sensor in signal connection with the controller is arranged in the third water storage tank, the first water outlet end of the third water storage tank is communicated with the water inlet end of the PH value adjusting device through a third pipeline, and a third pump in signal connection with the controller is arranged on the third pipeline.

Furthermore, the pretreatment system comprises a softener and a quartz sand filter which are sequentially communicated through a pipeline, the softener is communicated with the water outlet end of the raw water tank, and the water outlet end of the quartz sand filter is communicated with the water inlet end of the activated carbon filter.

Furthermore, a security filter is communicated between the quartz sand filter and the activated carbon filter tank, and a doser for adding sodium hydroxide is communicated between the security filter and the quartz sand filter.

Further, a medium-pressure ultraviolet lamp is arranged between the security filter and the active carbon filter.

Furthermore, a second water outlet end of the third water tank is communicated with a second-stage reverse osmosis membrane filter, a fourth water storage tank is connected with a water outlet end of the second-stage reverse osmosis membrane filter, a second conductivity sensor in signal connection with the controller is arranged in the fourth water storage tank, a first water outlet end of the fourth water storage tank is communicated with a water inlet end of the second-stage reverse osmosis membrane filter through a fourth pipeline, and a fourth pump in signal connection with the controller is arranged on the fourth pipeline.

Furthermore, the second water outlet end of the fourth water storage tank is communicated with a pure water tank, a liquid level sensor in signal connection with the controller is arranged in the pure water tank, the outlet end of the pure water tank is communicated with a pure water pipeline, and a water pump in signal connection with the controller is arranged on the pure water pipeline.

Furthermore, the TOC sensors are four, the four TOC sensors are respectively arranged on the front, rear, left and right inner walls of the first water storage tank, and the four TOC sensors are sequentially arranged at intervals along the vertical direction in an equal gradient manner.

Furthermore, the number of the first conductivity sensors is four, the four first conductivity sensors are respectively arranged on the front, rear, left and right inner walls of the second water storage tank, and the four first conductivity sensors are sequentially arranged at intervals along the up-down direction in an equal gradient manner.

Further, a fifth water tank is arranged between the second water storage tank and the PH value adjusting device, and a second PH value sensor in signal connection with the controller is arranged in the fifth water tank; the PH value adjusting device comprises a first PH value adjusting tank and a second PH value adjusting tank which are separated from each other, a first water outlet end and a second water outlet end of the fifth water tank are respectively communicated with the first PH value adjusting tank and the second PH value adjusting tank through a fifth pipeline and a sixth pipeline, and a fifth pump and a sixth pump which are in signal connection with the controller are respectively arranged on the fifth pipeline and the sixth pipeline; the feeding end of the first pH value adjusting tank is communicated with a third tank filled with a sodium hydroxide solution; the second PH value adjusting tank is communicated with a fourth tank filled with hydrochloric acid solution, and the first PH value adjusting tank and the second PH value adjusting tank are internally provided with stirring components.

Further, the stirring subassembly is including setting up first PH value regulation jar or the motor at second PH value regulation tank deck portion, the output of motor is connected with and is located first PH value regulation jar or the (mixing) shaft in the second PH value regulation jar, the interval is provided with a plurality of paddles on the (mixing) shaft, the length of paddle is from last to increasing gradually down.

Compared with the prior art, the utility model has the beneficial effects that:

(1) according to the utility model, the TOC sensor is arranged in the first water storage tank, the active carbon filter can effectively adsorb visible particles, organic matters and the like in the water body, so that the total organic carbon value in the water body treated by the active carbon filter can be reduced, at the moment, the water body treated by the active carbon filter is detected in real time through the TOC sensor, and when the total organic carbon value in the water body treated by the active carbon filter for the first time is detected to be higher than a set value, the controller controls the first pump to start to convey the water body back to the active carbon filter for secondary treatment again, so that the total organic carbon value of the prepared purified water can meet the requirement;

(2) the first conductivity sensor is arranged in the second water storage tank, so that the conductivity of the water body passing through the first conductivity sensor can be reduced by the first reverse osmosis membrane filter, the water body flowing out of the outlet end of the first reverse osmosis membrane filter is detected in real time by the first conductivity sensor, and when the fact that the conductivity of the water body treated by the first reverse osmosis membrane filter for the first time is higher than a set value is detected, the controller controls the second pump to be started to convey the water body to the first reverse osmosis membrane filter for the second time in a circulating mode, and the conductivity of the prepared purified water can meet requirements;

(3) the first PH value sensor is arranged in the third water storage tank, and the PH value of the water body can be adjusted by the PH value adjusting device, so that the water body flowing out of the outlet end of the PH value adjusting device is monitored in real time by the first PH value sensor at the moment, and when the PH value of the water body treated by the PH value adjusting device for the first time is detected to be not in accordance with the set range, the controller controls the third pump to start to circularly convey the water body back to the PH value adjusting device for secondary treatment, so that the PH value of the prepared purified water can meet the requirement.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 3 is a schematic view of an assembly structure of the first pH adjusting tank and the stirring tank of FIG. 2.

Wherein the reference numerals are:

100 raw water tanks;

210 a softener, 220 a quartz sand filter, 230 a safety filter, 240 a doser and 250 a medium-pressure ultraviolet lamp;

310 activated carbon filter tank, 320 first water storage tank, 330TOC sensor, 340 first pipeline, 350 first pump;

410 a first reverse osmosis membrane filter, 420 a second water storage tank, 430 a first conductivity sensor, 440 a second pipeline and 450 a second pump;

500PH value adjusting device, 510 first PH value adjusting tank, 520 second PH value adjusting tank, 530 third tank, 540 fourth tank, 551 motor, 552 stirring shaft and 553 blades;

610 a third water storage tank, 620 a first PH value sensor, 630 a third pipeline, 640 a third pump;

710 a two-stage reverse osmosis filter, 720 a fourth water storage tank, 730 a second conductivity sensor, 740 a fourth pipeline and 750 a fourth pump;

810 a pure water tank, 820 a liquid level sensor, 830 a water storage pipeline and 840 a water pump;

910 a fifth water tank, 920 a second PH sensor, 930 a fifth pipe, 940 a fifth pump, 950 a sixth pipe, 960 a sixth pump.

Detailed Description

In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless explicitly stated or limited otherwise; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.

Example 1

Referring to fig. 1, the multimedia filter of the purified water unit according to the embodiment of the present invention includes a raw water tank 100, an outlet of the raw water tank 100 is communicated with a pretreatment system, a water outlet of the pretreatment system is communicated with an activated carbon filter 310, a water outlet of the activated carbon filter 310 is communicated with a first water storage tank 320, a TOC sensor 330 is disposed in the first water storage tank 320, the TOC sensor 330 is in signal connection with a controller, a first water outlet of the first water storage tank 320 is communicated with a water inlet of the activated carbon filter 310 through a first pipeline 340, and a first pump 350 in signal connection with the controller is disposed on the first pipeline 340; the second water outlet end of the first water storage tank 320 is communicated with a first-stage reverse osmosis membrane filter 410, the water outlet end of the first-stage reverse osmosis membrane filter 410 is communicated with a second water storage tank 420, a first conductivity sensor 430 in signal connection with a controller is arranged in the second water storage tank 420, the first water outlet end of the second water storage tank 610 is communicated with the water inlet end of the first-stage reverse osmosis membrane filter 410 through a second pipeline 440, and a second pump 450 in signal connection with the controller is arranged on the second pipeline 440; the second outlet end of the second water storage tank 420 is communicated with a PH value adjusting device 500, the outlet end of the PH value adjusting device 500 is communicated with a third water storage tank 610, a first PH value sensor 620 in signal connection with a controller is arranged in the third water storage tank 610, the first outlet end of the third water storage tank 610 is communicated with the inlet end of the PH value adjusting device 500 through a third pipeline 630, and a third pump 640 in signal connection with the controller is arranged on the third pipeline 630. Note that the TOC sensor 330 herein refers to a total organic carbon sensor.

Compared with the prior art, the TOC sensor 330 is arranged in the first water storage tank 320, the active carbon filter 310 can effectively adsorb visible particles, organic matters and the like in the water body, so that the total organic carbon value in the water body treated by the active carbon filter 310 can be reduced, at the moment, the TOC sensor 330 is used for detecting the water body treated by the active carbon filter 310 in real time, and when the total organic carbon value in the water body treated by the active carbon filter 310 for the first time is detected to be higher than a set value, the controller controls the first pump 350 to be started to convey the water body back to the active carbon filter 310 for secondary treatment again, so that the total organic carbon value of the prepared purified water meets the requirement; the first conductivity sensor 430 is also arranged in the second water storage tank 420, so that the conductivity of the water passing through the first-stage reverse osmosis membrane filter 410 can be reduced, at the moment, the water flowing out of the outlet end of the first-stage reverse osmosis membrane filter 410 is detected in real time through the first conductivity sensor 430, and when the fact that the conductivity of the water passing through the first-stage reverse osmosis membrane filter 410 for the first time is higher than a set value is detected, the controller controls the second pump 450 to be started to convey the water back to the first-stage reverse osmosis membrane filter 410 for the second time in a circulating manner, so that the conductivity of the prepared purified water can meet the requirement; still through being equipped with first PH value sensor 620 in third storage water tank 610 simultaneously, because PH value adjusting device 500 can adjust the PH value of water, consequently carry out real-time supervision to the water body that flows from PH value adjusting device 500's exit end through first PH value sensor 620 this moment, when detecting that the PH value in the water that first process PH value adjusting device 500 handled does not conform to the settlement scope, the controller control third pump 640 starts to circulate the water again and carries back to PH value adjusting device 500 and handle again, in order to ensure that the PH value of the purified water of preparation satisfies the demands.

It can be understood that when the TOC sensor 330 detects that the total organic carbon value of the water body which is processed by being recycled to the activated carbon filter 310 for multiple times is always higher than the set value, a feedback signal is sent to the controller to alarm, so that an operator can overhaul the activated carbon filter 310 or detect raw water; when the first conductivity sensor 430 detects that the conductivity of the water body which is circulated for multiple times and returned to the first reverse osmosis membrane filter 410 for treatment is always higher than a set value, a feedback signal is sent to the controller to give an alarm so that an operator can overhaul the first reverse osmosis membrane filter 410; when the first PH sensor 620 detects that the PH value of the water body which is treated by the PH adjusting device 500 through multiple cycles does not reach the set range, the feedback signal is sent to the controller to give an alarm, so that the operator can overhaul the PH adjusting device 500.

As shown in fig. 1, the pretreatment system preferably includes a softener 210 and a quartz sand filter 220 which are sequentially communicated through a pipeline, the softener 210 is communicated with the water outlet end of the raw water tank 100, and the water outlet end of the quartz sand filter 220 is communicated with the water inlet end of the activated carbon filter 310. The raw water can be softened by the softener 210, so that the hardness of the prepared purified water can meet the requirement; impurities such as suspended substances, sludge, colloid and the like in raw water are removed through a quartz sand filter 220, so that the aim of pretreatment is fulfilled.

As shown in fig. 1, it is further preferable that a safety filter 230 is communicated between the quartz sand filter 220 and the activated carbon filter canister, and a chemical adding device 240 for adding sodium hydroxide is communicated between the safety filter 230 and the quartz sand filter 220. The water softened by the softener 210 and primarily filtered by the quartz sand filter 220 is sequentially mixed with the sodium hydroxide solution added by the doser 240, and then the residual substances such as trace suspended particles and colloids larger than 5 microns in the water can be effectively filtered by the cartridge filter 230.

As shown in fig. 1, it is further preferred that a medium-pressure uv lamp 250 is disposed between the canister filter 230 and the activated carbon filter 310. The medium-pressure ultraviolet lamp 250 is arranged behind the security filter 230, the intensity of ultraviolet rays can be effectively guaranteed, the ultraviolet rays with the wavelength range of 200-400 nm of the medium-pressure ultraviolet lamp 250 can sterilize the water body and remove residual chlorine, and microorganisms and organic matters in the water body flowing out of the pretreatment system are guaranteed to be at a low level.

As shown in fig. 1, preferably, the second water outlet end of the third water tank is communicated with a second reverse osmosis membrane filter 710, the water outlet end of the second reverse osmosis membrane filter 710 is connected with a fourth water storage tank 720, a second conductivity sensor 730 connected with a controller through a signal is arranged in the fourth water storage tank 720, the first water outlet end of the fourth water storage tank 720 is communicated with the water inlet end of the second reverse osmosis membrane filter 710 through a fourth pipeline 740, and the fourth pipeline 740 is provided with a fourth pump 750 connected with the controller through a signal. The water body is subjected to two-stage reverse osmosis treatment through the first-stage reverse osmosis membrane filter 410 and the second-stage reverse osmosis membrane filter 710, so that on one hand, the conductivity of the water body can be effectively reduced, and the conductivity of the prepared purified water is ensured to meet the requirement; on the other hand, the method also plays a role in prevention, and the prepared purified water cannot meet the requirement when one of the first-stage reverse osmosis membrane filter 410 or the second-stage reverse osmosis membrane filter 710 breaks down. Meanwhile, when the second conductivity sensor 730 detects that the conductivity of the water body primarily treated by the secondary reverse osmosis membrane filter 710 does not meet a set value, a signal is fed back to the controller, and the controller controls the fourth pump 750 to start to circularly convey the water body back to the secondary reverse osmosis membrane filter 710 for secondary treatment again, so as to ensure that the conductivity of the prepared purified water meets the requirement.

As shown in fig. 1, it is further preferable that the second water outlet end of the fourth water storage tank 720 is communicated with a pure water tank 810, a liquid level sensor 820 connected with a controller through a signal is arranged in the pure water tank 810, an outlet end of the pure water tank 810 is communicated with a pure water pipeline 830, and a water pump 840 connected with the controller through a signal is arranged on the pure water pipeline 830. The purified water obtained by preparation is collected by the pure water tank 810, and the purified water is output by controlling the water pump 840 to start up by the controller until the liquid level of the purified water accumulated in the pure water tank 810 reaches the position of the trigger liquid level sensor 820, so that the purified water is not required to be output all the time in the process of preparing the purified water.

Preferably, four TOC sensors 330 are provided, four TOC sensors 330 are respectively provided on the front, rear, left and right inner walls of the first water storage tank 320, and the four TOC sensors 330 are sequentially arranged at equal intervals in an up-down direction with equal gradient. By the arrangement, the difference of the total organic carbon values of the parts of the water body in different directions and different heights in the first water storage tank 320 can be fully considered, and the total organic carbon value of the prepared purified water can meet the requirement.

Preferably, the first conductivity sensors 430 are provided in four, four first conductivity sensors 430 are respectively provided on the front, rear, left and right inner walls of the second water storage tank 420, and the four first conductivity sensors 430 are sequentially arranged at equal intervals in an up-down direction with an equal gradient. By the arrangement, the difference of the conductivities of the parts of the water body in different directions and at different heights in the second water storage tank 420 can be fully considered, and the conductivity of the prepared purified water can meet the requirement.

Example 2

Referring to fig. 2 and 3, the embodiment of the present invention is different from embodiment 1 in that a fifth water tank 910 is disposed between the second water storage tank 420 and the PH adjusting device 500 in consideration of the presence of acid bias or alkali bias in raw water, and a second PH sensor 920 connected to a controller in signal is disposed in the fifth water tank 910; the PH adjusting device 500 comprises a first PH adjusting tank 510 and a second PH adjusting tank 520 which are separated from each other, a first water outlet end and a second water outlet end of the fifth water tank 910 are respectively communicated with the first PH adjusting tank 510 and the second PH adjusting tank 520 through a fifth pipeline 930 and a sixth pipeline 950, and the fifth pipeline 930 and the sixth pipeline 950 are respectively provided with a fifth pump 940 and a sixth pump 960 which are connected with a controller through signals; the feeding end of the first pH value adjusting tank 510 is communicated with a third tank 530 filled with a sodium hydroxide solution; the second pH value adjusting tank 520 is communicated with a fourth tank 540 filled with hydrochloric acid solution, and stirring components are arranged in the first pH value adjusting tank 510 and the second pH value adjusting tank 520. The water in the fifth water tank 910 is detected by the second PH sensor 920, and when the water is detected to be alkaline, the sixth pump 960 is controlled by the controller to start to convey the water to the second PH adjusting tank 520 for PH adjustment; when the water body is detected to be acidic, the fifth pump 940 is controlled by the controller to start to convey the water body to the first pH value adjusting tank 510 for pH value adjustment, so that the pH value adjustment of acidic or alkaline raw water is realized, and the application range is wide.

As shown in fig. 3, preferably, the stirring assembly includes a motor 551 disposed at the top of the first PH adjusting tank 510 or the second PH adjusting tank, a stirring shaft 552 disposed in the first PH adjusting tank 510 or the second PH adjusting tank 520 is connected to an output end of the motor 551, a plurality of blades 553 are spaced on the stirring shaft 552, and the length of the blades 553 is gradually increased from top to bottom. In the process of pH value adjustment, the solution can fully react by stirring the blades 553, and the pH adjustment effect is good; simultaneously with the length of paddle 553 from last crescent to, can increase the area of contact of paddle 553 with the solution among the stirring process to improve stirring effect.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (10)

1. The multi-media filter of the purified water unit is characterized by comprising a raw water tank, wherein an outlet of the raw water tank is communicated with a pretreatment system, a water outlet end of the pretreatment system is communicated with an activated carbon filter, a water outlet end of the activated carbon filter is communicated with a first water storage tank, a TOC sensor is arranged in the first water storage tank, the TOC sensor is in signal connection with a controller, a first water outlet end of the first water storage tank is communicated with a water inlet end of the activated carbon filter through a first pipeline, and a first pump in signal connection with the controller is arranged on the first pipeline; the second water outlet end of the first water storage tank is communicated with a first reverse osmosis membrane filter, the water outlet end of the first reverse osmosis membrane filter is communicated with a second water storage tank, a first conductivity sensor in signal connection with the controller is arranged in the second water storage tank, the first water outlet end of the second water storage tank is communicated with the water inlet end of the first reverse osmosis membrane filter through a second pipeline, and a second pump in signal connection with the controller is arranged on the second pipeline; the second water outlet end of the second water storage tank is communicated with a PH value adjusting device, the water outlet end of the PH value adjusting device is communicated with a third water storage tank, a first PH value sensor in signal connection with the controller is arranged in the third water storage tank, the first water outlet end of the third water storage tank is communicated with the water inlet end of the PH value adjusting device through a third pipeline, and a third pump in signal connection with the controller is arranged on the third pipeline.

2. The multi-media filter of the purified water unit as claimed in claim 1, wherein the pretreatment system comprises a softener and a quartz sand filter which are sequentially communicated through a pipeline, the softener is communicated with the water outlet end of the raw water tank, and the water outlet end of the quartz sand filter is communicated with the water inlet end of the activated carbon filter.

3. The multi-media filter of the purified water unit as claimed in claim 2, wherein a safety filter is communicated between the quartz sand filter and the activated carbon filter, and a doser for adding sodium hydroxide is communicated between the safety filter and the quartz sand filter.

4. The multi-media filter of a purified water unit according to claim 3, wherein a medium-pressure ultraviolet lamp is disposed between the cartridge filter and the activated carbon filter.

5. The multi-media filter of the purified water unit as claimed in claim 1, wherein the second water outlet end of the third water storage tank is communicated with a second reverse osmosis membrane filter, the water outlet end of the second reverse osmosis membrane filter is connected with a fourth water storage tank, a second conductivity sensor in signal connection with the controller is arranged in the fourth water storage tank, the first water outlet end of the fourth water storage tank is communicated with the water inlet end of the second reverse osmosis membrane filter through a fourth pipeline, and a fourth pump in signal connection with the controller is arranged on the fourth pipeline.

6. The multi-media filter of the purified water unit as claimed in claim 5, wherein the second outlet of the fourth water storage tank is connected to a pure water tank, the pure water tank is provided with a level sensor connected to the controller by signal, the outlet of the pure water tank is connected to a pure water pipe, and the pure water pipe is provided with a water pump connected to the controller by signal.

7. The multi-media filter of the purified water unit as claimed in claim 1, wherein four TOC sensors are provided, four TOC sensors are respectively provided on the front, rear, left and right inner walls of the first water storage tank, and the four TOC sensors are sequentially arranged at equal intervals along the up-down direction.

8. The multi-media filter of the purified water unit as claimed in claim 1, wherein four first conductivity sensors are provided, four first conductivity sensors are respectively provided on the front, rear, left and right inner walls of the second water storage tank, and the four first conductivity sensors are sequentially arranged at intervals along the up-down direction with equal gradient.

9. The multi-media filter of the purified water unit as claimed in claim 1, wherein a fifth water tank is disposed between the second water storage tank and the PH adjusting device, and a second PH sensor in signal connection with the controller is disposed in the fifth water tank; the PH value adjusting device comprises a first PH value adjusting tank and a second PH value adjusting tank which are separated from each other, a first water outlet end and a second water outlet end of the fifth water tank are respectively communicated with the first PH value adjusting tank and the second PH value adjusting tank through a fifth pipeline and a sixth pipeline, and a fifth pump and a sixth pump which are in signal connection with the controller are respectively arranged on the fifth pipeline and the sixth pipeline; the feeding end of the first pH value adjusting tank is communicated with a third tank filled with a sodium hydroxide solution; the second PH value adjusting tank is communicated with a fourth tank filled with hydrochloric acid solution, and the first PH value adjusting tank and the second PH value adjusting tank are internally provided with stirring components.

10. The multi-media filter of the water purification unit as claimed in claim 9, wherein the stirring assembly comprises a motor disposed on top of the first PH adjusting tank or the second PH adjusting tank, an output end of the motor is connected to a stirring shaft disposed in the first PH adjusting tank or the second PH adjusting tank, the stirring shaft is provided with a plurality of blades at intervals, and the length of the blades is gradually increased from top to bottom.

Images