CN211999298U - Purified water preparation facilities - Google Patents
Purified water preparation facilities Download PDFInfo
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- CN211999298U CN211999298U CN202020273273.4U CN202020273273U CN211999298U CN 211999298 U CN211999298 U CN 211999298U CN 202020273273 U CN202020273273 U CN 202020273273U CN 211999298 U CN211999298 U CN 211999298U
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Abstract
The utility model provides a purified water preparation facilities, the device is through adopting the ultraviolet unit to replace the active carbon filter among the original pretreatment systems, and with safety filter setting before the ultraviolet unit simultaneously, the ultraviolet intensity of further guarantee ultraviolet unit not only can the desorption chlorine residue simultaneously and inactivate former water microorganism, moreover very big reduction pretreatment systems and reverse osmosis unit's pasteurization frequency, simplified the purified water treatment process, reduced manufacturing cost.
Description
Technical Field
The utility model relates to a purified water technical field especially relates to a purified water preparation facilities.
Background
The application of purified water is very wide in the current society, is widely applied to the fields of medicine, chemical industry, biology and the like, and plays an indispensable role in scientific research, but the existing production of purified water still has more problems, so that the quality and the efficiency of the production of purified water cannot meet the actual production requirements.
The content of impurities such as organic matters and the like, microorganisms such as bacteria and the like, pH value and suspended particles in purified water are strictly controlled, and at present, medicinal purified water used in pharmaceutical factories is usually prepared by a medicinal purified water preparation device; in particular to the preparation of raw water after a raw water pretreatment device, a purified water preparation device and a storage and outward transportation device.
The existing purified water making device can be prepared only by multi-layer filtration, and a pretreatment system in a traditional purified water preparation system is divided into a multi-medium filter, a softener and an activated carbon filter. In order to ensure the level of microorganisms in reverse osmosis water, sodium hypochlorite is usually added into a pretreatment system as a bacteriostatic agent, but residual chlorine is consumed while the activated carbon adsorbs organic matters, so that the activated carbon becomes a hotbed for the growth of the microorganisms after adsorbing the organic matters, the phenomenon that the microorganisms in the outlet water of the activated carbon exceed the standard frequently occurs in actual operation, and the pretreatment and reverse osmosis systems need to be pasteurized more frequently to ensure the level of the microorganisms in the outlet water of the water machine. Similarly, some organic compounds which are not easily adsorbed by activated carbon exist, so that the organic compounds in the purified water exceed the standard.
CN209226758U discloses a purified water making device, which comprises a softener, a quartz sand filter device, an activated carbon filter device, a reverse osmosis treatment device, a primary purified water tank, an evaporator, a heater and a purified water tank storage box, wherein the device improves the filtration efficiency of the device by alternately replacing the activated carbon filter plate on the third fixing plate, but the device adopts the activated carbon filter device, and the situation that microorganisms and organic matters exceed standards easily occurs.
CN204873919U discloses a heat disinfection device for an activated carbon filter of purified water equipment, which alleviates the problem that microorganisms and organic matters in the outlet water of the activated carbon equipment exceed standards by adding the heat disinfection device for activated carbon filtration, but the method has high energy consumption, needs frequent pasteurization to ensure the level of microorganisms in the outlet water, and has a complex process.
CN206538295U discloses a purified water preparation facilities, through set up ultraviolet germicidal device before the purification water tank, can ensure the level of purification water tank inlet department microorganism, but still adopt activated carbon filter can ensure the microorganism and the organic matter level in later stage aquatic among the device pretreatment system, and this activated carbon filter also has the problem such as need frequently disinfect.
Therefore, it is necessary to develop a new purified water preparation apparatus to solve the problems that the levels of microorganisms and organic substances are easily out of standard or the process is complicated in the existing purified water preparation process.
SUMMERY OF THE UTILITY MODEL
In view of the problem that exists among the prior art, the utility model provides a purified water preparation facilities, the device increases the ultraviolet unit on original pretreatment systems's basis to do not include the activated carbon filter, can thoroughly inactivate the microorganism in the former aquatic when getting rid of the chlorine residue, greatly reduced whole purified water preparation facilities's pasteurization frequency, reduced manufacturing cost, higher industrial application has worth.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a purified water preparation device, which comprises a pretreatment system and a purified water preparation system which are connected in sequence through pipelines; the pretreatment system comprises a raw water unit, a filtering unit, a softening unit and an ultraviolet unit which are sequentially connected; the purified water preparation system comprises a reverse osmosis unit, an electric desalting unit and a purified water distribution unit which are connected in sequence.
The utility model provides a purified water preparation facilities is through increasing the ultraviolet unit on original pretreatment systems's basis, can eliminate the microorganism of chlorine residue and inactivation raw water simultaneously, has solved the problem that the microorganism that current active carbon filter brought exceeds standard and needs high frequency pasteurization well, not only greatly reduced whole purified water preparation systems's pasteurization frequency, reduced manufacturing cost, can ensure microorganism and organic matter level in the purified water better moreover.
Preferably, a cartridge filter is disposed between the softening unit and the ultraviolet unit.
The utility model is provided with a security filter in front of the ultraviolet unit, and uses the pores of the filter element with 5.0 μm to perform mechanical filtration; residual micro suspended particles, colloid and the like in water are intercepted or adsorbed in gaps on the surface of the filter element, and water passes through the filter element, so that the condition that ultraviolet intensity is influenced by the fact that substances with the size of 5.0 mu m are attached to the surface of the ultraviolet lamp by the ultraviolet lamp can be greatly relieved, and the inactivation effect of the ultraviolet unit on microorganisms is further guaranteed.
Preferably, the uv unit comprises a medium pressure uv lamp.
The vapor pressure of the medium-pressure ultraviolet lamp is 104～106Pa, for example, may be 1X 104Pa、2×104Pa、5×104Pa、8×104Pa、1×105Pa、2×105Pa、5×105Pa、8×105Pa、1×106Pa, preferably 5X 104～5×105Pa。
The ultraviolet wavelength range of the medium-pressure ultraviolet lamp is 180-400 nm, for example, 180nm, 190nm, 200nm, 210nm, 220nm, 230nm, 240nm, 260nm, 280nm, 300nm, 320nm, 340nm, 350nm, 370nm, 390nm or 400nm, preferably 200-400 nm.
The utility model discloses preferably with the ultraviolet wavelength range control of middling pressure ultraviolet lamp at 200 ~ 400nm, wherein, the ultraviolet ray of wavelength between 260nm-320nm can be decomposed into O with the effective chlorine of dissociating in aqueous2And HCl, the low-pressure ultraviolet ray with the wavelength of 254nm can effectively destroy microorganism DNA to achieve the effect of inactivating microorganisms, thereby ensuring the contents of microorganisms and residual chlorine in the effluent of the pretreatment system.
Preferably, the medium pressure uv lamp is a sleeve-type medium pressure uv lamp.
Preferably, the sleeve of the medium-pressure ultraviolet lamp is a quartz sleeve.
Preferably, the raw water unit comprises a raw water tank and a raw water pump which are connected in sequence.
Preferably, a first dosing unit is arranged in front of the raw water tank.
Preferably, the first dosing unit comprises a NaClO dosing unit.
Preferably, the filtration unit comprises a multi-media filter.
Preferably, the softening unit comprises at least two softeners in series.
The softening unit comprises a salt tank connected to at least two softeners.
Preferably, a water hardness detector is arranged at the outlet of the softener.
The utility model discloses a set up quality of water hardness detector in the softener export, can in time detect the water hardness condition after softening to better judgement softener saturation terminal point effectively practices thrift the quantity of salt.
Preferably, a second dosing unit is further provided between the softening unit and the cartridge filter.
Preferably, the second dosing unit comprises a NaOH dosing unit and a NaHSO dosing unit which are sequentially connected in series3A dosing unit.
Preferably, the reverse osmosis unit comprises at least two stages of reverse osmosis units in series.
A reverse osmosis water inlet pump is arranged in front of the reverse osmosis device.
Preferably, the reverse osmosis water inlet pump is a high pressure pump.
The high-pressure pump of reverse osmosis water intake pump's pressure application range is 0 ~ 2MPa, and this high-pressure pump includes multistage centrifugal pump.
Preferably, a heat exchange device is provided before the reverse osmosis unit.
The heat exchange device of the utility model has two functions, on one hand, the heat exchange device is used for improving the temperature of raw water so as to ensure the reverse osmosis performance of a reverse osmosis membrane (RO membrane) in a reverse osmosis unit and further ensure the quality of purified water; on the other hand, the heat exchange device can also be used for pasteurization of pretreatment units, reverse osmosis devices, electrodeionization devices and ultrafiltration devices.
Preferably, the outlet pipeline of the heat exchange device is connected with the raw water tank.
The outlet pipeline of the optimized heat exchange device of the utility model is connected with the raw water tank, on one hand, when the quality of the pretreated outlet water can not meet the requirement of the inlet water quality of the reverse osmosis unit, the outlet water can flow back to carry out secondary treatment; on the other hand, pasteurization of the pretreatment can be performed.
Preferably, the heat exchange device is a plate heat exchanger.
Preferably, the electrodeionization unit comprises an electrodeionization device.
And a water quality detection device is arranged on an outlet pipeline of the electric deionization device.
The utility model discloses be provided with water quality testing device on electrodeionization device's the outlet conduit, decide electrodeionization device play water through the testing result and get into the purification water pitcher or return pretreatment systems outlet conduit department to further ensure the stability of quality of water in the purification water pitcher.
Preferably, the water quality detection device comprises an organic matter detection device and a microorganism detection device.
The utility model discloses be provided with organic matter detection device and microorganism detection device on electrodeionization device's outlet pipeline, can in time detect electrodeionization device goes out organic matter and the microorganism level of water to judge better whether this goes out water and need circulate and handle, ensure to get into the quality of water of purification water distribution unit normal water.
The utility model has no limit to the organic matter detection device and the microorganism detection device, and can adopt any instrument which is well known by the technical personnel in the field and can be used for detecting the content of organic matters and microorganisms in water, and the organic matter detection device can be 5000TOC of Mettler-Torluo for example; the microorganism detection device may be, for example, 7000RMS mettler-toledo.
Preferably, a shunt pipeline connected with the ultraviolet unit outlet pipeline is arranged on the outlet pipeline of the electrodeionization device.
The utility model arranges the shunt pipeline connected with the ultraviolet unit outlet pipeline on the outlet pipeline of the electrodeionization device, so that water can be circulated to the ultraviolet unit outlet pipeline for retreatment when the quality of the effluent water of the electrodeionization device is unqualified, thereby ensuring the quality of the influent water of the purified water tank; meanwhile, the system can be ensured to quickly react when the water production is required.
Preferably, the purified water distribution unit comprises a purified water tank.
Preferably, the outlets of the multi-medium filter, the softener, the activated carbon filter, the reverse osmosis device and the electrodeionization device are provided with sampling detection devices.
The utility model is provided with sampling detection devices at the outlets of the devices, wherein sampling ports are separately arranged below the multi-medium filter, the softener and the active carbon filter devices; and sampling ports are arranged at the outlet pipelines of the reverse osmosis device and the electrodeionization device. The utility model discloses a set up the sample detection device in each device department to can in time know the undulant condition of quality of water in the preparation facilities processing procedure, be favorable to guaranteeing the stability of purification water quality of water in the final purification water distribution unit.
The utility model provides a purified water preparation facilities is used for preparing the process flow of purified water includes following step:
(1) raw water enters a raw water tank, is mixed with the medicament added in the first dosing unit and then enters a multi-media filter through a raw water pump for filtering, and impurities such as silt, suspended matters, colloid and the like in the raw water are removed;
(2) the water filtered by the multi-media filter enters at least two softeners for softening treatment, and the hardness of the water discharged from the softeners is monitored in real time;
(3) mixing the water softened by the softener with a medicament added by a second dosing unit, filtering out trace suspended particles, colloids, microorganisms and other substances remained in the water by a cartridge filter, sterilizing by ultraviolet rays with the wavelength range of 180-400 nm by an ultraviolet unit, and removing residual chlorine to complete pretreatment;
(4) the pretreated water is heated by a heat exchange device and then is pumped into a reverse osmosis device by a high-pressure pump for reverse osmosis treatment;
(5) the water after reverse osmosis treatment enters an electrodeionization device to remove salt, then organic matter and microorganism levels are respectively detected by an organic matter detection device and a microorganism detection device, and if the water does not meet the standard, the water is sent to a water outlet pipeline of a pretreatment system through a shunt pipeline to be subjected to secondary purification treatment; if meeting the standard, sending the purified water to a purified water distribution unit for storage and standby.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
(1) the utility model provides a purified water preparation facilities adopts the microorganism of middling pressure ultraviolet lamp desorption chlorine residue and complete inactivation raw water simultaneously, very big reduction pretreatment system and reverse osmosis unit middle pasteur's disinfection frequency, wherein, pretreatment system's pasteurization frequency can reduce to 6 months 1 time, reverse osmosis unit middle pasteurization frequency can reduce to 12 months 1 time;
(2) the purified water preparation device provided by the utility model does not comprise an active carbon filter, so that the device is simplified and the active carbon filter can be prevented from providing a hotbed for microorganisms;
(3) the utility model provides a purified water preparation facilities sets up safety filter before the ultraviolet unit, can effectively ensure ultraviolet intensity, and guarantee pretreatment systems goes out aquatic microorganism and organic matter and is in lower level.
Drawings
Fig. 1 is a schematic view of a purified water preparation apparatus provided in embodiment 1 of the present invention.
In the figure: 101-NaClO dosing unit; 102-a raw water tank; 103-raw water pump; 104-a multi-media filter; 1051-a first softener; 1052-a first softener; 106-salt tank; 107-hardness detector; 1081-NaOH dosing unit; 1082-NaHSO3A dosing unit; 109-cartridge filter; 110-medium pressure ultraviolet lamp; 201-plate heat exchanger; 202-a first reverse osmosis water intake pump; 203-a first stage reverse osmosis unit; 204-a second reverse osmosis water inlet pump; 205-a second stage reverse osmosis unit; 206-an electrodeionization device; 207-mertler-toledo 5000 TOC; 208-Mettler-Torlods 7000 RMS; 209-purified water tank.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
The present invention will be described in further detail below. However, the following examples are only simple examples of the present invention, and do not represent or limit the scope of the present invention, which is defined by the appended claims.
First, an embodiment
Example 1
The present embodiment provides a purified water preparation apparatus, as shown in fig. 1, which includes a pretreatment system and a purified water preparation system that are sequentially connected by a pipe.
The pretreatment system comprises a raw water unit, a filtering unit, a softening unit, a second dosing unit, a cartridge filter 403 and an ultraviolet unit which are connected in sequence. The raw water unit comprises a NaClO dosing unit 101, a raw water tank 102 and a raw water pump 103 which are connected in sequence; the first filtration unit comprises a multimedia filter 104; the softening unit comprises a first softener 1051 and a second softener 1052 in series, the softening unit further comprising a salt tank 106 connected to the first softener 1051 and the second softener 1052; water hardness detectors 107 are arranged at the outlets of the first softener 1051 and the second softener 1052 (the figure does not show specific pipelines, and the letters B and C indicate that the first softener 1051 and the second softener 1052 are respectively communicated with the water hardness detectors 107); the second dosing unit comprises a NaOH dosing unit 1081 and a NaHSO which are sequentially connected3A dosing unit 1082; the ultraviolet unit comprises a medium-pressure ultraviolet lamp 110, a sleeve of the medium-pressure ultraviolet lamp is a quartz sleeve, and the ultraviolet wavelength range of the medium-pressure ultraviolet lamp is 200-400 nm.
The purified water preparation system comprises a plate heat exchanger 201, a reverse osmosis unit, an electric desalting unit and a purified water distribution unit which are connected in sequence; an outlet pipeline of the plate heat exchanger 201 is connected with the raw water tank 102 (the specific pipeline is not drawn in the figure, and the two pipelines are indicated by letter A); the reverse osmosis unit comprises two stages of reverse osmosis devices connected in series, and sequentially comprises a first reverse osmosis water inlet pump 202, a first stage reverse osmosis device 203, a second reverse osmosis water inlet pump 204 and a second stage reverse osmosis device 205; the electrodeionization unit includes an electrodeionization device 206; arranging a total organic carbon detection device 207 (Mettler-Torland 5000TOC) and a microorganism detection device 208 (Mettler-Torland 7000RMS) on an outlet pipeline of the electric deionization device; the purified water distribution unit includes a purified water tank 209.
The process flow of the purified water preparation device for preparing purified water provided by the embodiment comprises the following steps:
(1) raw water enters a raw water tank, is mixed with NaClO added in a NaClO dosing unit and then enters a multi-media filter through a raw water pump for filtering, and impurities such as silt, suspended matters, colloid and the like in the raw water are removed;
(2) the water filtered by the multi-media filter enters a first softener and a second softener for softening treatment, and the hardness of the water discharged from the softeners is monitored in real time;
(3) the water softened by the softener is sequentially mixed with a NaOH dosing unit and NaHSO3NaOH and NaHSO added by a dosing unit3Filtering out substances such as trace suspended particles and colloid which are more than 5 mu m and remain in water by a cartridge filter after mixing, and sterilizing by ultraviolet rays with the wavelength range of 200-400 nm by a medium-pressure ultraviolet lamp to remove residual chlorine to complete pretreatment;
(4) the pretreated water is heated by a plate heat exchanger, then is pumped into a first-stage reverse osmosis device by a first reverse osmosis water inlet pump for first-stage reverse osmosis treatment, and then is pumped into a second-stage reverse osmosis device by a second reverse osmosis water inlet pump for second-stage reverse osmosis treatment;
(5) the water after reverse osmosis treatment enters an electrodeionization device to remove salt, organic matter and microorganism levels are respectively detected by 5000TOC of Mettler-Torlo and 7000RMS of Mettler-Torlo, and if the water does not meet the standard, the water is sent to a water outlet pipeline of a pretreatment system through a shunt pipeline to be subjected to secondary purification treatment; if meeting the standard, sending the purified water into a purified water tank for storage.
Example 2
This example provides a purified water preparation apparatus similar to that of example 1 except that the order of the safety filter and the medium pressure uv lamp in the pretreatment system was changed.
The pretreatment system specifically comprises a raw water unit, a filtering unit, a softening unit, a second dosing unit, an ultraviolet unit and a security filter which are sequentially connected.
The raw water unit comprises a NaClO dosing unit, a raw water tank and a raw water pump which are connected in sequence; the first filtration unit comprises a multimedia filter; the softening unit comprises a first softener and a second softener which are connected in series, and the softening unit also comprises a salt tank connected with the first softener and the second softener; water hardness detectors are arranged at the outlets of the first softener and the second softener; the second dosing unit comprises a NaOH dosing unit and a NaHSO which are sequentially connected3A dosing unit; the ultraviolet unit comprises a medium-pressure ultraviolet lamp, a sleeve of the medium-pressure ultraviolet lamp is a quartz sleeve, and the ultraviolet wavelength range of the medium-pressure ultraviolet lamp is 200-400 nm.
The process flow of the purified water preparation apparatus provided in this example for preparing purified water is the same as that of example 1 except for step (3).
The step (3) specifically comprises the following steps:
(3) the water softened by the softener is sequentially mixed with a NaOH dosing unit and NaHSO3NaOH and NaHSO added by a dosing unit3After mixing, sterilizing by ultraviolet rays with the wavelength range of 200-400 nm of an ultraviolet unit to remove residual chlorine, and filtering out trace suspended particles, colloid and other substances with the particle size of more than 5 mu m remained in water by a security filter to finish pretreatment.
Second, comparative example
Comparative example 1
This comparative example provides a purified water production apparatus which was the same as that of example 2 except that the "ultraviolet unit" was replaced with the "activated carbon filter" in the pretreatment system and was placed after the softening unit.
The device pretreatment system specifically comprises a raw water unit, a filtering unit, a softening unit, an activated carbon filter, a second dosing unit and a security filter which are connected in sequence.
The raw water unit comprises a NaClO dosing unit, a raw water tank and a raw water pump which are connected in sequence; the first filtration unit comprises a multimedia filter; the softening unit comprises a first softener and a second softener which are connected in series, and the softening unit also comprises a first softener and a second softenerA salt tank connected; water hardness detectors are arranged at the outlets of the first softener and the second softener; the second dosing unit comprises a NaOH dosing unit and a NaHSO which are sequentially connected3A dosing unit.
The process flow of the purified water producing apparatus provided in this comparative example for producing purified water was the same as that of example 2 except for the step (3).
The step (3) specifically comprises the following steps:
(3) the water softened by the softener enters an active carbon filter to adsorb residual organic matters and residual chlorine, and the active carbon filter sequentially reacts with a NaOH dosing unit and NaHSO after yielding water3NaOH and NaHSO added by a dosing unit3After mixing, filtering out trace suspended particles, colloid and other substances which are more than 5 mu m and remain in water by a cartridge filter to complete the pretreatment.
Third, test and results
The city tap water is used as raw water, the purified water preparation devices provided in the embodiments 1-2 and the comparative example 1 are used for purification treatment, whether the water quality of the final purified water meets the national pharmacopoeia standard or not is detected, and the pasteurization frequency is examined.
The test results of the above examples and comparative examples are shown in table 1.
TABLE 1
From table 1, the following points can be seen:
(1) by combining the embodiment 1 and the embodiment 2, the utility model adopts the ultraviolet unit to replace the original active carbon filter, and finally the quality of the purified water can reach the standard of the national pharmacopoeia; meanwhile, the pasteurization frequency in the pretreatment system and the reverse osmosis device is greatly reduced, wherein the pasteurization frequency of the pretreatment system can be reduced to 6 months for sterilization, and the pasteurization frequency of the reverse osmosis device is reduced to 12 months for sterilization;
(2) by combining example 2 with comparative example 1, it can be seen that by using a medium-pressure ultraviolet lamp instead of an activated carbon system in example 2, the pasteurization frequency of the pretreatment system in example 2 is only 1 time per 6 months, the pasteurization frequency of the reverse osmosis unit is only once per 12 months, and the pasteurization frequency of the pretreatment system and the reverse osmosis unit in comparative example 1 are both pasteurized once per month, compared to the activated carbon filter in comparative example 1; therefore, the utility model greatly reduces the pasteurization frequency in the system by adopting the medium-pressure ultraviolet lamp.
To sum up, the utility model provides a purified water preparation facilities increases the ultraviolet unit on the system of original preliminary treatment, can thoroughly inactivate the microorganism in the former aquatic in the time of getting rid of the chlorine residue, and the pasteurization frequency of system with preliminary treatment reduces to 6 months and disinfects once, and reverse osmosis unit's pasteurization frequency reduces to 12 months and disinfects once, has reduced manufacturing cost, has higher industrial application and worth.
The applicant states that the present invention is described by the above embodiments, but the present invention is not limited to the above detailed structural features, i.e. the present invention can be implemented only by relying on the above detailed structural features. It should be clear to those skilled in the art that any modifications to the present invention, to the equivalent replacement of selected parts and the addition of auxiliary parts, the selection of specific modes, etc., all fall within the scope of protection and disclosure of the present invention.
Claims (10)
1. A purified water preparation device is characterized by comprising a pretreatment system and a purified water preparation system which are sequentially connected through a pipeline;
the pretreatment system comprises a raw water unit, a filtering unit, a softening unit and an ultraviolet unit which are sequentially connected; the purified water preparation system comprises a reverse osmosis unit, an electric desalting unit and a purified water distribution unit which are connected in sequence.
2. The purified water preparation apparatus of claim 1 wherein a cartridge filter is disposed between the softening unit and the ultraviolet unit.
3. The purified water preparation apparatus of claim 1 or 2, wherein the ultraviolet unit comprises a medium pressure ultraviolet lamp;
the vapor pressure of the medium-pressure ultraviolet lamp is 104～106Pa；
The ultraviolet wavelength range of the medium-pressure ultraviolet lamp is 180-400 nm.
4. The purified water producing apparatus of claim 1, wherein the raw water unit comprises a raw water tank and a raw water pump connected in sequence.
5. The purified water preparation device according to claim 4, wherein a first dosing unit is provided before the raw water tank.
6. The purified water preparation device of claim 1 or 2 wherein the filtration unit comprises a multi-media filter.
7. The purified water preparation apparatus of claim 1 or 2 wherein the softening unit comprises at least two softeners in series;
the softening unit comprises a salt tank connected to at least two softeners.
8. The purified water preparation device of claim 1 or 2 wherein the reverse osmosis unit comprises at least two stages of reverse osmosis devices in series;
a reverse osmosis water inlet pump is arranged in front of the reverse osmosis device.
9. The purified water preparation apparatus of claim 1 or 2, wherein said electrodeionization unit comprises an electrodeionization device;
and a water quality detection device is arranged on an outlet pipeline of the electric deionization device.
10. The purified water preparation apparatus of claim 9 wherein a bypass line is provided on the outlet line of the electrodeionization device that is connected to the uv unit outlet line.
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| CN202020273273.4U CN211999298U (en) | 2020-03-06 | 2020-03-06 | Purified water preparation facilities |
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| CN202020273273.4U CN211999298U (en) | 2020-03-06 | 2020-03-06 | Purified water preparation facilities |
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| CN211999298U true CN211999298U (en) | 2020-11-24 |
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