CN114195301A

CN114195301A - Purified water preparation system

Info

Publication number: CN114195301A
Application number: CN202111543868.2A
Authority: CN
Inventors: 常季
Original assignee: Truking Watertown Pharmaceutical Equipment Co Ltd
Current assignee: Truking Watertown Pharmaceutical Equipment Co Ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-03-18

Abstract

The invention discloses a purified water preparation system, which comprises front-end processing equipment and rear-end processing equipment, wherein the front-end processing equipment comprises a first filter and a first buffer; the back-end processing equipment comprises an ion remover; the ion remover is connected with a liquid discharge pipe and a first return pipe, and the first return pipe is communicated with the first buffer. The ion remover discharges a part of the concentrated water through the liquid discharge pipe, but not all discharges, the discharge is reduced, the water resource is saved, the other part of the concentrated water discharged by the ion remover returns to the first buffer through the first return pipe, the water in the system is reused, the water resource utilization rate is improved, the returned concentrated water is mixed with the liquid cached in the first buffer, the ion concentration balance of the liquid in the system is ensured, the desalting efficiency is more stable, in addition, the whole system is not a closed system, the breeding of microorganisms is avoided, and the quality of the prepared purified water is improved.

Description

Purified water preparation system

Technical Field

The invention relates to the technical field of pharmaceutical water, in particular to a purified water preparation system.

Background

Pharmaceutical water is extremely demanding on water quality, usually purified water, which is prepared by a purified water preparation system for use in pharmaceutical plants. The production of purified water includes front-end treatment of raw water and back-end treatment for removing ions from the front-end treated water. The traditional purified water preparation system has the risks of unstable desalination, microorganism breeding and the like, and the quality of the prepared purified water is influenced.

Disclosure of Invention

Based on this, there is a need for a purified water preparation system; this purified water preparation system is at the in-process of preparing purified water, and the desalination is more stable, and has avoided the breeding problem of microorganism for the quality of the purified water of preparation is higher.

The technical scheme is as follows:

one embodiment provides a purified water preparation system comprising:

a front-end processing apparatus comprising a first filter and a first buffer for storing liquid output by the first filter;

a back-end processing device comprising an ion remover for de-ionizing liquid output by the front-end processing device;

the ion remover is connected with a liquid discharge pipe and a first return pipe, the liquid discharge pipe is used for discharging a part of concentrated water discharged by the ion remover, the first return pipe is communicated with the first buffer, and the first return pipe is used for enabling another part of concentrated water discharged by the ion remover to return to the first buffer.

In the purified water preparation system, liquid (such as raw water) is filtered by the first filter, the first buffer caches the liquid output by the first filter and continues to output towards the rear end, and the ion remover removes ions from the liquid output by the front-end processing equipment to obtain purified water; the ion remover discharges a part of the concentrated water through the liquid discharge pipe, but not all discharges, the discharge is reduced, the water resource is saved, the other part of the concentrated water discharged by the ion remover returns to the first buffer through the first return pipe, the water in the system is reused, the water resource utilization rate is improved, the returned concentrated water is mixed with the liquid cached in the first buffer, the ion concentration balance of the liquid in the system is ensured, the desalting efficiency is more stable, in addition, the whole system is not a closed system, the breeding of microorganisms is avoided, and the quality of the prepared purified water is improved.

The technical solution is further explained below:

in one embodiment, the ion remover comprises a primary removal assembly and a secondary removal assembly, the primary and secondary removal assemblies being arranged in series;

the first-stage removal assembly is used for receiving liquid output by the front-end processing equipment and carrying out deionization treatment, the liquid discharge pipe is connected with the first-stage removal assembly and used for discharging a part of concentrated water discharged by the first-stage removal assembly, and the first return pipe is connected with the first-stage removal assembly and used for enabling the other part of concentrated water discharged by the first-stage removal assembly to flow back to the first buffer;

the second-stage removing component is used for receiving the liquid output by the first-stage removing component and carrying out deionization treatment, the second-stage removing component is connected with a second return pipe, the second return pipe is communicated with the first buffer, and the second return pipe is used for enabling the concentrated water discharged by the second-stage removing component to return to the first buffer.

In one embodiment, the primary removing assembly comprises a first removing unit and a second removing unit, wherein the first removing unit is used for receiving the liquid output by the front-end processing equipment and carrying out deionization processing; the input end of the second removing unit is communicated with the discharge end of the first removing unit, the second removing unit is used for receiving the liquid discharged by the first removing unit and carrying out deionization treatment, and the liquid discharge pipe and the first return pipe are both communicated with the discharge end of the second removing unit;

the secondary removing assembly comprises a third removing unit, the input end of the third removing unit is communicated with the output end of the first removing unit and the output end of the second removing unit, the third removing unit is used for carrying out deionization treatment on the liquid output by the first removing unit and the liquid output by the second removing unit, and the second return pipe is communicated with the discharge end of the third removing unit.

In one embodiment, a drain valve is arranged on the drain pipe and used for controlling the discharge flow on the drain pipe;

the first return pipe is provided with a first return valve, and the first return valve is used for controlling the return flow on the first return pipe;

and a second backflow valve is arranged on the second backflow pipe and used for controlling backflow flow on the second backflow pipe.

In one embodiment, the first removal unit, the second removal unit, and the third removal unit are all reverse osmosis filters.

In one embodiment, the back-end processing apparatus further comprises a first water pump and a second water pump; the first water pump is arranged between the front-end processing equipment and the first-stage removing component, and the second water pump is arranged between the first-stage removing component and the second-stage removing component.

In one embodiment, the ion remover further comprises a third-stage removing assembly, the third-stage removing assembly is used for receiving the liquid output by the second-stage removing assembly and performing deionization treatment, the third-stage removing assembly is connected with a third return pipe, the third return pipe is communicated with the first buffer, and the third return pipe is used for returning concentrated water discharged by the third-stage removing assembly to the first buffer.

In one embodiment, the tertiary removal assembly comprises a continuous electric desalter; and a third backflow valve is arranged on the third backflow pipe and used for controlling backflow flow on the third backflow pipe.

In one embodiment, the front-end processing device further includes a main pipeline, a second buffer and a second filter, an output end of the main pipeline is communicated with the back-end processing device, and the second buffer, the first filter, the first buffer and the second filter are sequentially disposed on the main pipeline.

In one embodiment, the first filter is an ultrafiltration filter and the second filter is a microfiltration filter;

the front-end processing equipment further comprises a third filter, the third filter is arranged on the main pipeline and is positioned between the second cache and the first filter, and the filtering precision of the third filter is lower than that of the first filter;

the front-end processing equipment further comprises an ultraviolet lamp and a degassing membrane, wherein the ultraviolet lamp and the degassing membrane are arranged on the main pipeline, the second filter, the ultraviolet lamp and the degassing membrane are arranged in sequence, and the second filter is positioned between the first buffer and the ultraviolet lamp;

a first chemical adding port is formed in the main pipeline and is positioned on the liquid inlet side of the second buffer, and the first chemical adding port is used for adding a bactericide into liquid in the main pipeline;

a second dosing port is arranged on the main pipeline, is positioned on the liquid outlet side of the second buffer, is positioned between the second buffer and the third filter, and is used for adding an acidifying agent to the liquid in the main pipeline;

a third water pump and a fourth water pump are further arranged on the main pipeline, and the third water pump is arranged between the second buffer and the second dosing port; and the fourth water pump is arranged between the first buffer and the second filter.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Furthermore, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements in the drawings are drawn only by way of example, and not necessarily to true scale.

FIG. 1 is a schematic diagram of the overall configuration of a purified water production system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the overall structure of the front-end processing apparatus in the embodiment of FIG. 1;

fig. 3 is a schematic diagram of the overall structure of the back-end processing device in the embodiment of fig. 1.

Reference is made to the accompanying drawings in which:

110. a first filter; 120. a second filter; 130. a third filter; 140. a first buffer; 150. a second buffer; 160. an ultraviolet lamp; 170. degassing a membrane; 180. a main pipeline; 181. a first dosing port; 182. a second dosing port; 191. a third water pump; 192. a fourth water pump; 210. a primary removal assembly; 211. a first removing unit; 212. a second removing unit; 220. a secondary removal component; 221. a third removing unit; 230. a tertiary removal assembly; 241. a first return pipe; 242. a second return pipe; 243. a third return conduit; 244. a liquid discharge pipe; 251. a first reflux valve; 252. a second reflux valve; 253. a third reflux valve; 254. a drain valve; 261. a first water pump; 262. and a second water pump.

Detailed Description

Embodiments of the present invention are described in detail below with reference to the accompanying drawings:

in order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1 to 3, one embodiment provides a purified water preparation system, including a front-end processing device and a back-end processing device. Wherein:

as shown in fig. 1 and 2, the front-end processing apparatus includes a first filter 110 and a first buffer 140, and the first buffer 140 is used for storing the liquid output by the first filter 110.

As shown in fig. 1 and 3, the back-end processing apparatus includes an ion remover for performing a deionization process on the liquid output from the front-end processing apparatus.

As shown in fig. 1 and 3, the ion remover is connected with a drain pipe 244 and a first return pipe 241, the drain pipe 244 is used for discharging a part of the concentrated water discharged from the ion remover, the first return pipe 241 is communicated with the first buffer 140, and the first return pipe 241 is used for returning another part of the concentrated water discharged from the ion remover to the first buffer 140.

In the purified water preparation system, liquid (such as raw water) is filtered by the first filter 110, the first buffer 140 buffers the liquid output by the first filter 110 and continues to output towards the rear end, and the ion remover removes ions (such as acid-base ions and the like) from the liquid output by the front-end processing equipment to obtain purified water; the ion remover discharges a part of the concentrated water through the liquid discharge pipe 244, but not all discharges, the discharge is reduced, the water resource is saved, the other part of the concentrated water discharged by the ion remover returns to the first buffer 140 through the first return pipe 241, the water in the system is reused, the water resource utilization rate is improved, the returned concentrated water is mixed with the liquid cached in the first buffer 140, the ion concentration balance of the liquid in the system is ensured, the desalting efficiency is more stable, in addition, the whole system is not a closed system, the breeding of microorganisms is avoided, and the quality of the prepared purified water is improved.

It can be understood that:

after entering the ion remover, the liquid is divided into two parts, one part is the liquid after removing ions, and the other part is the liquid with higher ion concentration and mixed with part of the liquid without removing ions, the part is called as concentrated water, the concentrated water enters the liquid discharge pipe 244 and the first return pipe 241 through the discharge end of the ion remover, in the working process, the liquid discharge pipe 244 always discharges the concentrated water, the first return pipe 241 enables part of the concentrated water to flow back into the first buffer 140, the concentrated water and the liquid in the first buffer 140 are uniformly mixed, the ion concentration in the system is more balanced, and the phenomenon that the quality of produced water is influenced by unbalanced acid-base ion concentration caused by instant backflow into the pipeline is avoided.

In one embodiment, referring to fig. 1 and 3, the ion remover comprises a primary 210 and a secondary 220 removal assembly, the primary 210 and the secondary 220 removal assemblies being arranged in series.

In one embodiment, referring to fig. 3, the primary removing element 210 is configured to receive the liquid output by the front-end processing apparatus and perform a deionization process, the drain pipe 244 is connected to the primary removing element 210, the drain pipe 244 is configured to drain a portion of the concentrated water discharged from the primary removing element 210, and the first return pipe 241 is connected to the primary removing element 210 and configured to return another portion of the concentrated water discharged from the primary removing element 210 to the first buffer 140.

In one embodiment, referring to fig. 3, the secondary removing element 220 is configured to receive the liquid output by the primary removing element 210 and perform a deionization process, the secondary removing element 220 is connected to a second return pipe 242, the second return pipe 242 is communicated with the first buffer 140, and the second return pipe 242 is configured to return the concentrated water discharged by the secondary removing element 220 to the first buffer 140.

As shown in fig. 3, the primary removing component 210 and the secondary removing component 220 are arranged in series, and the liquid after the deionization treatment of the primary removing component 210 enters the secondary removing component 220 for deionization again to ensure the deionization effect; meanwhile, a part of concentrated water generated after the first-stage removing component 210 is deionized and all concentrated water generated after the second-stage removing component 220 is deionized flow back to the first cache tank, so that the ion concentration in the system is balanced.

An intermediate tank is not arranged between the primary removing component 210 and the secondary removing component 220, so that the sealing performance of the whole system is ensured, the breeding of microorganisms is reduced, and the derived risk of sterilizing the intermediate tank independently is avoided.

Optionally, both the primary removal assembly 210 and the secondary removal assembly 220 may include at least one removal unit to adjust the PH of the liquid.

In one embodiment, referring to fig. 3, the primary removing assembly 210 includes a first removing unit 211 and a second removing unit 212, where the first removing unit 211 is configured to receive the liquid output by the front-end processing apparatus and perform a deionization process; the input end of the second removing unit 212 is communicated with the discharge end of the first removing unit 211, the second removing unit 212 is used for receiving the liquid discharged by the first removing unit 211 and performing deionization treatment, and the drain pipe 244 and the first return pipe 241 are both communicated with the discharge end of the second removing unit 212.

In one embodiment, referring to fig. 3, the secondary removing assembly 220 includes a third removing unit 221, an input end of the third removing unit 221 is communicated with both an output end of the first removing unit 211 and an output end of the second removing unit 212, the third removing unit 221 is configured to perform a deionization treatment on the liquid output by the first removing unit 211 and the liquid output by the second removing unit 212, and the second return pipe 242 is communicated with a discharge end of the third removing unit 221.

In this embodiment, the primary removal assembly 210 includes two removal units, the secondary removal assembly 220 includes one removal unit, the primary removal assembly 210 and the secondary removal assembly 220 are connected in series, and the two removal units in the primary removal assembly 210 are caused to be in parallel.

It can be understood that:

the first removing unit 211 receives the liquid output by the front-end processing equipment and performs deionization treatment, the liquid generated after deionization treatment enters the third removing unit 221 to perform deionization treatment again, and the concentrated water and part of liquid which is not deionized enter the second removing unit 212 to perform deionization treatment; the liquid from which the ions are removed by the second removing unit 212 also enters the third removing unit 221 for further deionization, and a part of the concentrated water is discharged through the drain pipe 244, and the other part of the concentrated water flows back to the first buffer 140 through the first return pipe 241; the liquid from which the ions are removed by the third removing unit 221 is output, and the generated concentrated water is all returned to the first buffer 140 through the second return pipe 242.

In one embodiment, referring to FIG. 3, the drain line 244 is provided with a drain valve 254, and the drain valve 254 is used to control the discharge flow rate of the drain line 244.

In one embodiment, referring to fig. 3, a first return valve 251 is disposed on the first return pipe 241, and the first return valve 251 is used for controlling a return flow rate of the first return pipe 241.

In one embodiment, referring to fig. 3, a second return valve 252 is disposed on the second return pipe 242, and the second return valve 252 is used for controlling a return flow rate of the second return pipe 242.

The drain valve 254 is used to adjust the amount of concentrated water discharged from the drain pipe 244, and as shown in fig. 2, concentrated water in the drain valve 254 is discharged through the port C; the first reflux valve 251 is used for adjusting the amount of the concentrated water refluxed into the first buffer 140 by the first-stage removing assembly 210; the second recirculation valve 252 is used to adjust the amount of concentrate recirculated by the secondary removal module 220 into the first buffer 140 to more evenly balance the ion concentration throughout the system.

Optionally, the first return valve 251 is a manual angle seat valve.

In one embodiment, the first removal unit 211, the second removal unit 212, and the third removal unit 221 are all reverse osmosis filters.

The reverse osmosis filter is a RO (reverse osmosis) filter known to those skilled in the art.

In one embodiment, referring to fig. 1 and 3, the back end treatment apparatus further includes a first water pump 261 and a second water pump 262. The first water pump 261 is provided between the front-end processing apparatus and the primary removal module 210, and the second water pump 262 is provided between the primary removal module 210 and the secondary removal module 220.

In one embodiment, referring to fig. 3, the ion remover further includes a tertiary removal module 230, the tertiary removal module 230 is configured to receive the liquid output by the secondary removal module 220 and perform a deionization treatment, the tertiary removal module 230 is connected to a third return pipe 243, the third return pipe 243 is communicated with the first buffer 140, and the third return pipe 243 is configured to return the concentrated water discharged by the tertiary removal module 230 to the first buffer 140.

The third-stage removing assembly 230 is used for removing salt, and concentrated water generated after the salt removal flows back into the first buffer 140 through the third return pipe 243, so that the system is a closed system, the breeding of microorganisms is reduced, and the discharge is reduced; the liquid produced after the salt removal process by the tertiary removal assembly 230 is output through port B of fig. 3 for use or reprocessing to ultimately produce purified water.

In one embodiment, the tertiary removal assembly 230 includes a continuous electric desalter.

The continuous electric salt remover is known as EDI (electrodeionization) equipment by those skilled in the art.

In one embodiment, referring to fig. 3, a third return valve 253 is disposed on the third return pipe 243, and the third return valve 253 is used for controlling a return flow rate of the third return pipe 243.

Optionally, third return valve 253 is a manual diaphragm valve.

In one embodiment, referring to fig. 1 and 2, the front-end processing device further includes a main pipeline 180, a second buffer 150, and a second filter 120, an output end of the main pipeline 180 is communicated with the back-end processing device, and the second buffer 150, the first filter 110, the first buffer 140, and the second filter 120 are sequentially disposed on the main pipeline 180.

As shown in fig. 1 and 2, raw water enters through a port a of a main pipe 180, advances forward, and passes through the second buffer 150, the first filter 110, the first buffer 140, and the second filter 120 in sequence, thereby filtering the raw water.

In one embodiment, referring to fig. 1 and 2, the first filter 110 is an ultrafiltration filter, and the second filter 120 is a microfiltration filter.

The second filter 120 acts as a restriction. First filter 110 compares filtration structures such as traditional sand filtration, not only occupies smallly, can not lead to producing unstable problem of water because of the regularly changed filter material moreover. The liquid in the first buffer 140 can be used as a water source for backwashing the first filter 110, which is more convenient.

Optionally, a 5 μm filter unit is built in the precision filter to provide final protection for the back-end processing equipment.

In one embodiment, referring to fig. 1 and 2, the front-end processing apparatus further includes a third filter 130, the third filter 130 is disposed on the main pipeline 180 and located between the second buffer 150 and the first filter 110, and a filtering precision of the third filter 130 is lower than that of the first filter 110.

As shown in fig. 2, the liquid in the main pipeline 180 is primarily filtered by the third filter 130 to remove larger particles from the liquid, then filtered by the first filter 110, and then filtered by the second filter 120 to be filtered step by step with higher and higher filtering precision, thereby improving the filtering precision of the liquid.

Optionally, the third filter 130 is a self-cleaning filter.

It can be understood that:

self-cleaning filters, ultrafiltration filters and precision filters are all known to those skilled in the art and will not be described in detail here.

In one embodiment, referring to fig. 1 and 2, the front-end treatment apparatus further comprises an ultraviolet lamp 160 and a degassing membrane 170, wherein the ultraviolet lamp 160 and the degassing membrane 170 are both disposed on the main pipeline 180, the second filter 120, the ultraviolet lamp 160, and the degassing membrane 170 are disposed in sequence, and the second filter 120 is located between the first buffer 140 and the ultraviolet lamp 160.

The ultraviolet lamp 160 can decompose residual chlorine in the system and remove microorganisms in the system, thereby ensuring the normal operation of the back-end treatment equipment. Compared with the traditional activated carbon, the ultraviolet lamp 160 has small occupied area, has double functions of removing residual chlorine and removing microorganisms, does not need regular washing and pasteurization of the activated carbon, and ensures continuous operation of equipment.

The degassing membrane 170 can remove gas such as carbon dioxide dissolved in liquid in the system, and compared with the traditional manner of removing carbon dioxide by adding sodium hydroxide, the degassing effect is more stable. The degassing membrane 170 effectively removes carbon dioxide dissolved in the liquid, reduces the influence of carbon dioxide on the conductivity, and ensures the water production stability of the system.

Alternatively, the ultraviolet lamp 160 may be provided in the duct to decompose residual chlorine and remove microorganisms from the liquid.

Optionally, the ultraviolet lamp 160 is a medium pressure ultraviolet lamp 160.

In one embodiment, referring to fig. 1 and fig. 2, a first chemical adding port 181 is disposed on the main pipeline 180, the first chemical adding port 181 is located on a liquid inlet side of the second buffer 150, and the first chemical adding port 181 is used for adding a bactericide to the liquid in the main pipeline 180.

Alternatively, the first dosing port 181 may be a port structure and the antimicrobial agent may be sodium hypochlorite.

In one embodiment, referring to fig. 1 and fig. 2, a second dosing port 182 is disposed on the main pipeline 180, the second dosing port 182 is located at the liquid outlet side of the second buffer 150, the second dosing port 182 is located between the second buffer 150 and the third filter 130, and the second dosing port 182 is used for adding an acidifying agent to the liquid in the main pipeline 180.

The second chemical adding port 182 can be a port structure, and an acidifying agent is added to adjust the pH value of the liquid in the system, so that the concentration of carbonate ions in the liquid is changed, carbonate ions are prevented from being combined with calcium ions, magnesium ions and the like to form carbonate precipitates, and scale formed in the liquid is reduced through directional adjustment. Compared with a softener, the structure is simple, the consumption of regenerated salt is not needed, the discharge of high-concentration chloride ions is avoided, the pollution and the damage to the environment are reduced, and regular flushing and regular regeneration are not needed, so that a softener plasma exchange structure is replaced.

In one embodiment, referring to fig. 1 and fig. 2, a third water pump 191 and a fourth water pump 192 are further disposed on the main pipeline 180, and the third water pump 191 is disposed between the second buffer 150 and the second dosing port 182; the fourth water pump 192 is disposed between the first buffer 140 and the second filter 120.

Alternatively, the first, second, third, and fourth water pumps 261, 262, 191, and 192 may all be high-pressure pumps.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A purified water preparation system, comprising:

2. The purified water preparation system of claim 1 wherein said ion remover comprises a primary removal assembly and a secondary removal assembly, said primary and secondary removal assemblies being arranged in series;

3. The purified water preparation system of claim 2, wherein the primary removal assembly comprises a first removal unit and a second removal unit, the first removal unit being configured to receive the liquid output by the front-end processing device and perform a deionization process; the input end of the second removing unit is communicated with the discharge end of the first removing unit, the second removing unit is used for receiving the liquid discharged by the first removing unit and carrying out deionization treatment, and the liquid discharge pipe and the first return pipe are both communicated with the discharge end of the second removing unit;

4. The purified water preparation system of claim 3, wherein a drain valve is provided on the drain line, the drain valve being configured to control a discharge flow rate on the drain line;

5. The purified water preparation system of claim 3, wherein the first, second, and third removal units are reverse osmosis filters.

6. The purified water preparation system of claim 2 wherein the back end treatment apparatus further comprises a first water pump and a second water pump; the first water pump is arranged between the front-end processing equipment and the first-stage removing component, and the second water pump is arranged between the first-stage removing component and the second-stage removing component.

7. The purified water preparation system of claim 2, wherein the ion remover further comprises a tertiary removal assembly, the tertiary removal assembly is configured to receive the liquid output by the secondary removal assembly and perform deionization treatment, the tertiary removal assembly is connected to a third return pipe, the third return pipe is communicated with the first buffer, and the third return pipe is configured to return the concentrated water discharged by the tertiary removal assembly to the first buffer.

8. The purified water preparation system of claim 7, wherein the tertiary removal assembly comprises a continuous electric desalter; and a third backflow valve is arranged on the third backflow pipe and used for controlling backflow flow on the third backflow pipe.

9. The purified water preparation system of claim 7, wherein the front-end processing device further comprises a main pipeline, a second buffer and a second filter, wherein an output end of the main pipeline is communicated with the back-end processing device, and the second buffer, the first filter, the first buffer and the second filter are sequentially arranged on the main pipeline.

10. The purified water preparation system of claim 9, wherein the first filter is an ultrafiltration filter and the second filter is a precision filter;