CN218969018U

CN218969018U - High recovery rate pure water treatment device

Info

Publication number: CN218969018U
Application number: CN202222567466.2U
Authority: CN
Inventors: 马兵; 李敏; 李京; 王纯刚; 陈云; 李炳云; 陈佳
Original assignee: Chongqing Molecular Water System Co ltd
Current assignee: Chongqing Molecular Water System Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-05-05
Anticipated expiration: 2032-09-27

Abstract

The utility model discloses a high-recovery pure water treatment device, which comprises a raw water tank, a raw water pump and a filtering device communicated with the raw water pump, wherein one end of the filtering device is provided with a cleaning device, the other end of the filtering device is provided with a primary RO device and a secondary RO device, the primary RO device is also communicated with a concentrated water recovery device, the water inlet end of the secondary RO device is communicated with the raw water tank, the water outlet end of the secondary RO device is sequentially provided with a secondary pure water tank, an EDI water supply pump, a precision filter, an EDI device, an ultrapure water tank and an ultrapure water conveying circulating pump, and one side of the EDI device is communicated with the raw water tank. The utility model is provided with the filtering device, the cleaning device and the concentrated water recovery device, and on the premise of ensuring the production of ultrapure water, the pretreated water is reasonably and orderly used for cleaning the filtering device, and the pretreated concentrated water is reasonably recovered for circulating treatment, so that the utilization efficiency of the concentrated water is improved while the discharge waste of the concentrated water is reduced, and the device has a simple structure and is convenient to operate.

Description

High recovery rate pure water treatment device

Technical Field

The utility model relates to the technical field of water treatment, in particular to a pure water treatment device with high recovery rate.

Background

The problem that the ultrapure water system for sampling the reverse osmosis membrane process is difficult to avoid is the comprehensive utilization rate problem of tap water, and the problems of pretreatment backwash water discharge, primary reverse osmosis concentrated water discharge, secondary concentrated water discharge, EDI concentrated water discharge and discharge with unqualified primary ultrapure water purity are involved in the process, and the conventional pretreated backwash water and the primary reverse osmosis concentrated water are discharged into a municipal sewage pipeline. The concentrated water discharged from a plurality of places is not effectively utilized, so that the total utilization rate of tap water is reduced, water resources are wasted, the water production cost of ultrapure water is increased, and meanwhile, the use cost of users is correspondingly increased, and the method is also a great waste of social resources.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to solve the technical problems that: a high recovery rate pure water treatment apparatus is provided which can improve the utilization rate of pretreated water and pure water while improving the recovery rate of pure water.

In order to solve the technical problems, the utility model adopts a technical scheme that: the utility model provides a high recovery pure water treatment facilities, including former water tank and the raw water pump that is linked together the setting to and the filter equipment who sets up with the raw water pump intercommunication, filter equipment's one end intercommunication is equipped with belt cleaning device, and the other end is equipped with one-level RO device and second grade RO device along the play water direction intercommunication in proper order, one-level RO device still communicates and is equipped with dense water recovery unit, the inlet end and the former water tank intercommunication of second grade RO device, the play water end of this second grade RO device communicates in proper order and is equipped with second grade pure water tank, EDI feed pump, precision filter, EDI device, ultrapure water tank and ultrapure water pump that carries, one side and former water tank (1) intercommunication of ultrapure water tank.

By adopting the structure, the cleaning device is communicated with the filtering device, and the water subjected to pretreatment cleaning is collected, clarified and then backflushed into the filtering device for cleaning operation, so that the running water is not externally connected for flushing in the process, the use cost of the running water is reduced, and the use efficiency of the pretreated water is improved; the arrangement of the concentrated water recovery device is to split a part of the concentrated water in the first-stage RO device and also perform reverse osmosis treatment at the same time, so that the capacity of the reverse osmosis treatment is increased and the efficiency of the reverse osmosis treatment is improved; when the concentrated water reaching the second-stage RO device still does not reach the standard, the concentrated water can flow back to the original water tank in time to carry out circulation treatment, and when the concentrated water reaches the standard, the concentrated water flows to the second-stage pure water tank, the EDI water supply pump, the precision filter and the EDI device in sequence to carry out treatment processing of ultrapure water, finally the concentrated water flows into the ultrapure water tank to be stored, the ultrapure water supply circulating pump is set to provide pressure and flow to a water point, if the quality of the ultrapure water exceeds the standard, the ultrapure water supply circulating pump is started to recycle the unqualified water into the EDI device and flows back to the original water tank to carry out relevant treatment steps of the ultrapure water again, the circulation treatment can be realized until the water quality reaches the standard, the use efficiency of the concentrated water in the ultrapure water tank is improved, the circulating reprocessing can be realized when the water quality exceeds the standard, the water cost is saved again, the setting structure is simple and compact, and the operation is convenient.

In order to ensure that the filtering effect meets the pretreatment requirement of ultrapure water, as an optimization, the filtering device comprises a mechanical filter communicated with the water outlet end of the raw water pump, the water outlet end of the mechanical filter is sequentially communicated with an activated carbon filter, a softening filter and a security filter, the water outlet end of the security filter is communicated with a primary RO device, a primary high-pressure pump is communicated between the security filter and the primary RO device, and a first stop valve is communicated between the primary high-pressure pump and the security filter.

For saving water, improve the availability factor of pretreatment water simultaneously, as the preference, belt cleaning device includes the backwash water clarifier that all communicates with mechanical filter, active carbon filter and softening filter, backwash water clarifier and three the hookup location department of filter respectively is equipped with a drain valve, and the play water end intercommunication of this backwash water clarifier is equipped with the clarification tank, the output intercommunication of clarification tank is equipped with the backwash pump, the play water end intercommunication of backwash pump is equipped with the outlet pipe, all communicate between outlet pipe and mechanical filter, active carbon filter and the softening filter and be equipped with the connecting pipe, every all be equipped with a purge valve on the connecting pipe.

In order to facilitate improvement of the flow efficiency of pure water, preferably, the water outlet end of the primary RO device is communicated with a primary pure water tank, and a secondary high-pressure pump is communicated between the water outlet end of the primary pure water tank and the secondary RO device.

For being convenient for improve the treatment effeciency of dense water, as the preference, dense water recovery unit includes the shunt tubes with one-level RO device water inlet end intercommunication, the play water end of shunt tubes is equipped with first control valve, the play water end and the dense water tank intercommunication of first control valve, the play water end of dense water tank communicates in proper order and is provided with dense water pump and dense water RO device, the water inlet end intercommunication of dense water RO device is equipped with the drain pipe, is equipped with the outlet valve on this drain pipe, and the play water end intercommunication of this dense water RO device is equipped with the three-way valve, the one end and the one-level pure water tank intercommunication of three-way valve, the other end and former water tank intercommunication between one-level pure water tank and the three-way valve the intercommunication is equipped with the second stop valve between former water tank and the three-way valve is equipped with the third stop valve.

In order to facilitate timely discharging of concentrated water generated by cleaning, preferably, a flushing pipe is communicated with one side of the shunt pipe, and a second control valve is arranged on the flushing pipe.

In order to control the flow direction of the purified water after treatment, preferably, a third control valve is arranged between the secondary RO device and the original water tank in a communicating way.

In order to control the flow direction of the ultrapure water after treatment conveniently, preferably, the water inlet end of the EDI device is also communicated with a return pipe, and the water outlet end of the return pipe is communicated with the primary pure water tank.

In order to facilitate recovery of the unacceptable ultrapure water, it is preferable that the return pipe is provided with a fourth control valve.

The beneficial effects are that: the utility model is provided with the filter device, is communicated with the filter device and is provided with the cleaning device and the concentrated water recovery device, the pretreated water is reasonably and orderly used for cleaning the filter device on the premise of ensuring the production of ultrapure water, and the pretreated concentrated water is reasonably recovered for circulation treatment, so that the utilization efficiency of the concentrated water is improved while the discharge waste of the concentrated water is reduced, and the utility model has the advantages of simple structure and convenient operation.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

fig. 1 is a schematic structural view of the present utility model.

The meaning of the reference numerals in the drawings are:

a raw water tank-1; a raw water pump-11; a mechanical filter-21; activated carbon filter-22; softening the filter-23; a cartridge filter-24; a first-stage high-pressure pump-241; a first shut-off valve-242;

shunt tube-30; a flush tube-301; a primary RO device-31; primary pure water tank-311; a second-stage RO device-32; a second-stage high-pressure pump-312;

a water-washing clarifier-41; a clear water tank-42; backwash pump-43; a water outlet pipe-44; a connecting pipe-45; a purge valve-46;

a secondary pure water tank-51; EDI feed pump-52; -a precision filter-53; EDI device-54; a return pipe-541; ultrapure water tank-55; an ultrapure water delivery circulation pump-56;

a concentrate tank-61; a concentrate pump-62; a dense water RO device-63; a drain pipe-631; a three-way valve-64; a second shut-off valve-641; a third shut-off valve-642;

a first control valve-71; a second control valve-72; a third control valve-73; fourth control valve-74.

Detailed Description

As shown in fig. 1, the utility model comprises a raw water tank 1 and a raw water pump 11 which are communicated, and a filtering device communicated with the raw water pump 11, wherein the filtering device comprises a mechanical filter 21 communicated with the water outlet end of the raw water pump 11, the water outlet end of the mechanical filter 21 is sequentially communicated with an activated carbon filter 22, a softening filter 23 and a security filter 24, the water outlet end of the security filter 24 is communicated with a primary RO device 31, a primary high-pressure pump 241 is communicated between the security filter 24 and the primary RO device 31, and a first stop valve 242 is communicated between the primary high-pressure pump 241 and the security filter 24.

The mechanical filter 21, the activated carbon filter 22 and the softening filter 23 are all communicated with a backwash water clarifier 41 in the cleaning device, and a drain valve 40 is arranged at each of the communication positions of the backwash water clarifier 41 and the three filters; the cleaning device further comprises a clarified water tank 42 communicated with the water outlet end of the backwash water clarifier 41, a backwash pump 43 is communicated with the output end of the clarified water tank 42, a water outlet pipe 44 is communicated with the water outlet end of the backwash pump 43, connecting pipes 45 are communicated between the water outlet pipe 44 and the mechanical filter 21, the activated carbon filter 22 and the softening filter 23, and a cleaning valve 46 is arranged on each connecting pipe 45.

The first-stage RO device 31 is also communicated with a concentrated water recovery device, the concentrated water recovery device comprises a shunt pipe 30 communicated with the water inlet end of the first-stage RO device 31, the water outlet end of the shunt pipe 30 is provided with a first control valve 71, the water outlet end of the first control valve 71 is communicated with a concentrated water tank 61, the water outlet end of the concentrated water tank 61 is sequentially communicated with a concentrated water pump 62 and a concentrated water RO device 63, the water inlet end of the concentrated water RO device 63 is communicated with a drain pipe 631, the drain pipe 631 is provided with a water outlet valve, the water outlet end of the concentrated water RO device 63 is communicated with a three-way valve 64, one end of the three-way valve 64 is communicated with a first-stage pure water tank 311, the other end of the three-way valve 64 is communicated with a raw water tank 1, a second stop valve 641 is communicated between the first-stage pure water tank 311 and the three-way valve 64, and a third stop valve 642 is communicated between the raw water tank 1 and the three-way valve 64; a flushing pipe 301 is provided in communication with one side of the shunt pipe 30, and a second control valve 72 is provided in the flushing pipe 301.

The water outlet end of the primary RO device 31 is sequentially communicated with a primary pure water tank 311 and a secondary RO device 32, and a secondary high-pressure pump 312 is communicated between the water outlet end of the primary pure water tank 311 and the secondary RO device 32.

The water inlet end of the secondary RO device 32 is communicated with the original water tank 1, and a third control valve 73 is arranged between the secondary RO device 32 and the original water tank 1; the water outlet end of the second-stage RO device 32 is sequentially communicated with a second-stage pure water tank 51, an EDI water supply pump 52, a precision filter 53, an EDI device 54, an ultrapure water tank 55 and an ultrapure water delivery circulating pump 56; the water inlet end of the EDI device 54 is further communicated with a return pipe 541, the water outlet end of the return pipe 541 is communicated with the first-stage pure water tank 311, and the return pipe 541 is provided with a fourth control valve 74.

The application method of the utility model is as follows:

as shown in fig. 1, a raw water pump 11 is arranged to provide the power for pumping water from a raw water tank 1, a mechanical filter 21 is arranged to filter and intercept suspended matters, sediment and the like in the inlet water, and when a certain pressure difference is reached, backwashing is needed to regenerate a filter material layer, so that the suspended matters are clearly intercepted; the active carbon filter 22 is arranged to intercept, absorb and filter organic matters in the inlet water, absorb the oxidative sterilizing available chlorine, avoid the oxidative damage to the rear reverse osmosis membrane, absorb and decolor the inlet water and ensure the clarity of the outlet water; the softening filter 23 is arranged, so that calcium and magnesium ions in the inlet water can be removed, and the deposition of calcium carbonate or calcium sulfate, magnesium carbonate or magnesium sulfate on the reverse osmosis membrane surface at the rear section is avoided; the cartridge filter 24 is a protection device in front of the reverse osmosis membrane, and can intercept and filter possible particulate matters in the pretreatment device, so as to avoid scratching or blocking the membrane.

The filter needs to be cleaned after a period of use, and in order to reduce the use of tap water, at this time, the first stop valve 242 is closed, so that the pretreated water does not flow to the first-stage RO device 31 any more, simultaneously, the three drain valves 40 communicated with the mechanical filter 21, the activated carbon filter 22 and the softened filter 23 are opened, the residual water in the filter and the raw water flowing into the raw water tank 1 are all discharged into the backwash water clarifier 41, the clarified water flows into the clarification water tank 42 and finally is pumped out to the water outlet pipe 44 by the backwash pump 43, and because the water quantity is limited, the water quantity and the water pressure for cleaning the three filters are not enough, at this time, only the cleaning valves 46 on the connecting pipes 45 communicated with the corresponding filters need to be opened one by one, the mechanical filter 21, the activated carbon filter 22 and the softened filter 23 need to be cleaned one by one, the cleaned water enters the backwash water clarifier 41 again through the drain valves, the water is collected and clarified by the pretreated cleaned water, and then the filter device is cleaned, in this process, the backwash operation is performed without external tap water is performed, the use cost of tap water is reduced, and the use efficiency of the pretreated water is improved.

It should be noted that, in the above process, if the amount of water and the water pressure of the cleaning water are sufficient, the raw water pump 11 should be turned off in time to stop the water supply; after the cleaning, after the cleaning water in the filter is shot, the drain valve 40 is closed, the raw water pump 11 and the first stop valve 242 are opened, the backwash pump 43 continues to pump the water in the clear water tank 42 to the filter for filtering operation, normal filtering treatment is started, waste is reduced, and the utilization efficiency of backwash water is improved.

Under the action of the primary high-pressure pump 241, the filtered water sequentially flows into the primary RO device 31 and the primary pure water tank 311, is pumped into the secondary RO device 32, the secondary pure water tank 51, the EDI water supply pump 52, the precise filter 53 and the EDI device 54 by the secondary high-pressure pump 312, and finally flows into the ultrapure water tank 55; the working pressure provided by the two high-pressure pumps is 12-15 kg force, the filtering precision of the precise filter 53 is 1um, and the EDI module is effectively protected by filtering particles.

In this process, if the reverse osmosis effect of the primary RO device 31 is reduced, the first control valve 71 is opened to allow part of the pretreated water to flow into the concentrate tank 61 through the shunt pipe 30, then the concentrate pump 62 is opened to pump the water in the concentrate tank 61 into the concentrate RO device 63 for reverse osmosis treatment, if the treatment reaches the standard, the second stop valve 641 is opened, the third stop valve 642 is closed, the water flows into the primary pure water tank 311, if the discharged concentrate water does not reach the standard, the third stop valve 642 is opened, the second stop valve 641 is closed, and the water flows into the raw water tank 1 for cyclic filtration treatment; in still another case, when the concentrated water discharged during the cleaning is discharged from the first-stage RO device 31, if the water quality is too poor and replacement is required, the second stop valve 641 and the third stop valve 642 are closed, the water outlet valve (not shown) is opened, and the concentrated water is directly discharged from the concentrated water RO device 63; when the concentrated water RO device 63 cannot work normally, the first control valve 71 is closed, the second control valve 72 is opened, and the concentrated water can be directly discharged; because of the technical requirements related to water quality judgment, the first control valve 71 and the second control valve 72 need to be closed at intervals at regular or irregular intervals so as to sample and observe, and the production of pure water is reasonably ensured, so that the discharge of concentrated water can be ensured, and the recycling of the concentrated water can be realized.

Similarly, when the pure water flowing into the secondary RO device 32 does not reach the standard, the third control valve 73 is opened, and the pure water directly flows back to the original water tank 1 at the water inlet end of the secondary RO device 32 for recycling and reprocessing.

The ultrapure water supply circulation pump 56 provides pressure and flow to water points, for example, the quality of the ultrapure water exceeds the standard, the ultrapure water supply circulation pump 56 is started to recycle the unqualified water into the EDI device 54 and back to the first-stage pure water tank 311, the relevant treatment steps of the ultrapure water are carried out again, the circulation treatment can be realized until the quality of the ultrapure water reaches the standard, and the ultrapure water is discharged into the ultrapure water tank 55 for standby, so that the consumption of tap water is saved.

The use state not only improves the use efficiency of the pretreated water and the concentrated water in the reverse osmosis device, but also can realize the cyclic reprocessing of the ultrapure water when the water quality exceeds the standard, thereby greatly saving the water cost and improving the use efficiency of the water body.

In addition, if the operability is to be improved, the labor intensity is reduced, and particularly, the operation of the first control valve 71 and the second control valve 72 that are closed at intervals may be adapted to connect the PLC controller to the raw water pump 11, the control valve, the high pressure pump and the stop valve in the present embodiment, so as to implement the operation automation.

Claims

1. A high recovery rate pure water treatment device is characterized in that: including former water tank (1) and raw water pump (11) that are linked together and the filter equipment who sets up with raw water pump (11) intercommunication, filter equipment's one end intercommunication is equipped with belt cleaning device, and the other end is equipped with one-level RO device (31) and second grade RO device (32) along play water direction intercommunication in proper order, one-level RO device (31) still communicates and is equipped with dense water recovery unit, the water inlet end and the former water tank (1) intercommunication of second grade RO device (32), the play water end of this second grade RO device (32) communicates in proper order and is equipped with second grade pure water tank (51), EDI feed water pump (52), precision filter (53), EDI device (54), ultrapure water tank (55) and ultrapure water delivery circulation pump (56), one side and the former water tank (1) intercommunication of EDI device (54).

2. A high recovery pure water treatment apparatus according to claim 1, wherein: the filtering device comprises a mechanical filter (21) communicated with the water outlet end of a raw water pump (11), an activated carbon filter (22), a softening filter (23) and a security filter (24) are sequentially communicated with the water outlet end of the mechanical filter (21), the water outlet end of the security filter (24) is communicated with a primary RO device (31), a primary high-pressure pump (241) is communicated between the security filter (24) and the primary RO device (31), and a first stop valve (242) is communicated between the primary high-pressure pump (241) and the security filter (24).

3. A high recovery pure water treatment apparatus according to claim 1, wherein: the cleaning device comprises a backwash water clarifier (41) which is communicated with a mechanical filter (21), an activated carbon filter (22) and a softening filter (23), wherein a drainage valve (40) is respectively arranged at the communication positions of the backwash water clarifier (41) and the three filters, a clarification water tank (42) is arranged at the water outlet end of the backwash water clarifier (41), a backwash pump (43) is arranged at the output end of the clarification water tank (42), a water outlet pipe (44) is arranged at the water outlet end of the backwash pump (43), a connecting pipe (45) is arranged between the water outlet pipe (44) and the mechanical filter (21), the activated carbon filter (22) and the softening filter (23), and a cleaning valve (46) is arranged on each connecting pipe (45).

4. A high recovery pure water treatment apparatus according to claim 1, wherein: the water outlet end of the primary RO device (31) is communicated with a primary pure water tank (311), and a secondary high-pressure pump (312) is communicated between the water outlet end of the primary pure water tank (311) and the secondary RO device (32).

5. The high recovery pure water treatment apparatus according to claim 4, wherein: the concentrated water recovery device comprises a shunt tube (30) communicated with the water inlet end of a primary RO device (31), a first control valve (71) is arranged at the water outlet end of the shunt tube (30), the water outlet end of the first control valve (71) is communicated with a concentrated water tank (61), a concentrated water pump (62) and a concentrated water RO device (63) are sequentially communicated with the water outlet end of the concentrated water tank (61), a drain pipe (631) is arranged at the water inlet end of the concentrated water RO device (63), a water outlet valve is arranged on the drain pipe (631), a three-way valve (64) is arranged at the water outlet end of the concentrated water RO device (63), one end of the three-way valve (64) is communicated with a primary pure water tank (311), the other end of the three-way valve (64) is communicated with a primary pure water tank (1), a second stop valve (641) is arranged between the primary pure water tank (311) and the three-way valve (64), and a third stop valve (642) is arranged between the primary pure water tank (1) and the three-way valve (64).

6. The high recovery pure water treatment apparatus according to claim 5, wherein: a flushing pipe (301) is communicated with one side of the shunt pipe (30), and a second control valve (72) is arranged on the flushing pipe (301).

7. A high recovery pure water treatment apparatus according to claim 1, wherein: and a third control valve (73) is communicated between the secondary RO device (32) and the original water tank (1).

8. A high recovery pure water treatment apparatus according to claim 1, wherein: the water inlet end of the EDI device (54) is also communicated with a return pipe (541), and the water outlet end of the return pipe (541) is communicated with the primary pure water tank (311).

9. The high recovery pure water treatment apparatus according to claim 8, wherein: a fourth control valve (74) is provided on the return pipe (541).