CN216549982U - Double-circulation equipment for preparing ultrapure water - Google Patents
Double-circulation equipment for preparing ultrapure water Download PDFInfo
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- CN216549982U CN216549982U CN202123194683.3U CN202123194683U CN216549982U CN 216549982 U CN216549982 U CN 216549982U CN 202123194683 U CN202123194683 U CN 202123194683U CN 216549982 U CN216549982 U CN 216549982U
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Abstract
The utility model discloses double-circulation equipment for preparing ultrapure water, which comprises a pure water tank connected with an ultrapure water preparation control center, a first water circulation system and a second water circulation system, so as to form a double-water circulation loop for preparing ultrapure water. When the first water circulation system is in a pulse circulation mode, the water stored in the pure water tank is kept to continuously circulate in the second water circulation loop through switching of the electromagnetic valves of the first water circulation system and the second water circulation system; when the water storage continuous cycle timing in the pure water tank is finished, switching the water storage in the pure water tank by the electromagnetic valves of the first water circulation system and the second water circulation system until the water storage in the pure water tank is switched back to the internal circulation state; and repeating the steps until the next cycle period. The double-circulation equipment for preparing ultrapure water has extremely low added cost and low energy consumption, not only reduces the total organic carbon TOC of water stored in a pure water tank, but also creates the optimal total organic carbon TOC condition for a back-end ultrapure system; and the microorganism index of the water stored in the water tank can be controlled at a lower level, so that the pollution of the rear section is prevented.
Description
Technical Field
The utility model belongs to the technical field of water treatment, and particularly relates to an ultrapure water preparation system.
Background
At present, in a conventional small ultrapure water production system, the basic production flow is shown in FIG. 1. The principle is as follows: the primary/intermediate pure water produced by reverse osmosis or EDI principle is firstly stored in pure water tank T, then is sucked into an internal water circulating system formed from ultrapure component and necessary power valve by means of circulating pump P to make secondary purification so as to prepare ultrapure water with higher purity, and the ultrapure water is passed through the detection of conductivity meter C and passed through the detection process, and can be taken out. The ultra-purification component comprises an ultraviolet lamp U, an ion exchange column D and a conductivity meter C. Because ultrapure water is extremely unstable, when water is not taken, the internal water circulation system can keep a continuous or pulse circulation mode to ensure stable water quality so as to quickly reach the standard when the internal water circulation system is used next time.
In many applications, it is important that the organic index (expressed as total organic carbon TOC) of ultrapure water reach trace levels, which requires the following conditions to ensure (e.g., total organic carbon TOC <10 ppb):
first, the total organic carbon TOC of the feed water (i.e., the water stored in the tank) is sufficiently low, typically <50 ppb;
secondly, the online photo-oxidation device can continuously eliminate total organic carbon TOC;
thirdly, the ultra-pure column containing the special TOC filter material capable of removing the total organic carbon.
In fact, the total organic carbon TOC of the produced water of RO reverse osmosis or RO + EDI is unstable, is influenced by many conditions, and is difficult to control effectively, which is the most important influencing factor that causes the total organic carbon TOC index of the ultrapure water to be difficult to reach a low enough value. Although the internal water circulation system can repeatedly purify pure water in the internal circulation system to achieve a low enough Total Organic Carbon (TOC) level, once the pure water is continuously taken, the Total Organic Carbon (TOC) of the feed water is too high (exceeding the highest TOC requirement of the feed water of the system), which directly leads to the rapid exceeding of the Total Organic Carbon (TOC) of the finally produced ultrapure water.
In addition, the internal circulation system in the conventional process shown in fig. 1 cannot continuously treat the water stored in the pure water tank T, and the water stored in the pure water tank may be in a dead water state for a long time, so that microorganisms therein are propagated, the microorganism index is too high, and serious pollution is also brought to the ultrapure water preparation process.
In summary, there are two significant problems with conventional small ultrapure water preparation systems:
firstly, the total organic carbon TOC of the feed water is higher in requirement but cannot be effectively controlled;
secondly, the water stored in the pure water tank is easy to breed microorganisms, and the microorganisms are used as the water supply of the ultrapure system, so that the water tank faces higher risk of microbial pollution.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides a double water circulation device for preparing ultrapure water. By a mode without obviously increasing extra cost, the total organic carbon TOC stored in a pure water tank is reduced under the condition of only consuming a small amount of electric energy, and the optimal water supply total organic carbon TOC condition is created for a back-end ultrapure system; and can control the microorganism index of water stored in the pure water tank at a lower level, thereby preventing the pollution of the back section.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a double-circulation device for ultrapure water preparation comprises a pure water tank, a first water circulation system and a second water circulation system, wherein the pure water tank is connected with an ultrapure water preparation control center; wherein the content of the first and second substances,
the first water circulation system comprises a circulating pump, an online overflowing type dual-wavelength ultraviolet lamp, an online ultrapure column, an online conductivity meter and a first power valve group; the circulating pump is connected with the pure water tank, the online overflowing type dual-wavelength ultraviolet lamp is connected with the circulating pump and the online ultrapure column, and the online ultrapure column is connected with an online conductivity meter; the online conductivity meter is connected with a water taking valve; the first power valve group comprises a first electromagnetic valve and a first one-way valve which are connected, and the other end of the first electromagnetic valve is connected to a pipeline between the online conductivity meter and the water taking valve; the other end of the first one-way valve is connected to a pipeline between the pure water tank and the circulating pump; when the water taking valve does not work, the first water circulation system keeps a pulse circulation mode through the first power valve group;
the second water circulation system comprises a second electromagnetic valve and a second one-way valve; one end of the second one-way valve is connected with the pure water tank, and the other end of the second one-way valve is connected with the second electromagnetic valve; the other end of the second electromagnetic valve is connected to a pipeline between the on-line overflowing type double-wavelength ultraviolet lamp and the on-line ultrapure column.
According to the ultrapure water preparation double-circulation equipment, the top of the pure water tank is provided with the circulation water port, and the bottom of the pure water tank is provided with the water outlet; the circulating water port is connected to a second water circulating system, and the water outlet is connected to a circulating pump.
The technical scheme provided by the utility model has the following beneficial effects:
firstly, compared with the traditional ultrapure water preparation system, the ultrapure water preparation device is additionally provided with a second water circulation system behind the on-line over-flow type dual-wavelength ultraviolet lamp and in front of the on-line ultrapure column so as to form a second water circulation loop connected with a pure water tank, and main/branch switching is carried out through the electromagnetic valve group; the water stored in the pure water tank is not in a dead water condition any more, but is periodically sterilized by ultraviolet rays, and the reduction of the TOC index also plays a positive role in inhibiting the propagation of microorganisms; the water supply condition is greatly improved, and the method plays a critical role in stabilizing indexes of ultrapure water prepared in the later stage. Meanwhile, the workload of the filter material except TOC is greatly reduced, so that the effects of prolonging the column efficiency and reducing the operation cost are achieved.
Secondly, the second water circulation system of the utility model has extremely low added cost, and only has one electromagnetic valve and one-way valve, and partial pipe fitting cost.
Thirdly, the power consumption of the second water circulation system is extremely low, taking a conventional small laboratory ultra-pure water system as an example, the water tank is circulated for 15min per hour on average, and the power consumption is increased by about 11W/hour (6W of a circulating pump, 3.5W of an online overflowing dual-wavelength ultraviolet lamp and 1.5W of an electromagnetic valve).
Fourthly, the ultrapure water preparation device has obvious and efficient reduction of the TOC of water stored in the water tank (see figure 3), and for pure water with the volume of 30L, TOC ≈ 80ppb, the TOC can be reduced to 15ppb by only 40min under the condition of using 14W dual-wavelength ultraviolet and 1.5LPM flow rate, and the reduction range is as high as 80%.
Fifthly, the second water circulation system is connected behind the on-line overflowing type double-wavelength ultraviolet lamp U and in front of the on-line ultrapure column D, the water circulation loop of the pure water tank does not flow through the ultrapure column, extra loss of the service life of the ultrapure column is avoided, and the conductivity index of water stored in the water tank is not obviously changed.
Sixthly, the ultrapure water preparation equipment is connected with the second water circulation system through a circulation water port arranged at the top of the water tank, and water is discharged through a water outlet arranged at the bottom of the pure water tank, so that sufficient water body circulation is obtained.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic view showing the construction of a prior art ultrapure water production system;
FIG. 2 is a schematic view of the constitution of an ultrapure water production apparatus of the present invention;
FIG. 3 is a table showing TOC tester data during circulation of water stored in a water tank of an ultrapure water preparing apparatus of the present invention in a second water circulation circuit.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, the terms "first", "second" or "third", etc. are used for distinguishing between different items and not for describing a particular sequence.
In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, all directional or positional relationships indicated by the terms "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," "counterclockwise," and the like are based on the directional or positional relationships indicated in the drawings and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element so indicated must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present invention.
In the claims, the description and the drawings of the present application, unless otherwise expressly limited, the terms "fixedly connected" or "fixedly connected" should be interpreted broadly, that is, any connection between the two that does not have a relative rotational or translational relationship, that is, non-detachably fixed, integrally connected, and fixedly connected by other devices or elements.
In the claims, the specification and the drawings of the present invention, the terms "including", "having" and their variants, if used, are intended to be inclusive and not limiting.
Referring now to fig. 2 and 3, a double circulation apparatus for ultrapure water production according to the present invention is illustrated, comprising a pure water tank connected to an ultrapure water production control center, a first water circulation system and a second water circulation system.
As shown in fig. 2, the primary/intermediate pure water produced via the reverse osmosis RO or EDI principle is first stored in the pure water tank T. The pure water tank T, the first water circulation system and the second water circulation system are connected to form an effective ultrapure water preparation double-water circulation loop.
The first water circulation system is connected with a pure water tank T to form a water circulation loop of the ultra-purification system, and comprises a circulation pump P, an ultra-purification component and a first power valve group.
The circulating pump P is connected with a pure water tank T, the ultrapure component comprises an online overflowing type dual-wavelength ultraviolet lamp U, an online ultrapure column D and an online conductivity meter C, the online overflowing type dual-wavelength ultraviolet lamp U is connected with the circulating pump P and the online ultrapure column D, and the online ultrapure column D is connected with the online conductivity meter C; and the online conductivity meter C is connected with a water taking valve.
The first power valve group comprises a first electromagnetic valve A and a first one-way valve B, one end of the first electromagnetic valve A is connected with the first one-way valve B, and the other end of the first electromagnetic valve A is connected to a pipeline between the on-line conductivity meter C and the water intake valve; the other end of the first one-way valve B is connected to a pipeline between the pure water tank T and the circulating pump P.
The first water circulation system has an internal circulation function, specifically, the circulation pump P sucks in primary/intermediate pure water of the pure water tank T, the primary/intermediate pure water flows through the on-line flow-through dual-wavelength ultraviolet lamp U for photo-oxidation and then flows through the on-line ultrapure column D for ion exchange, so that deep-layer repurified ultrapure water is prepared. If the ultrapure water which is repurified is qualified by the detection of the on-line conductivity meter C, the ultrapure water is immediately taken out and used through the water taking valve. If the repurified ultrapure water is unqualified when detected by the on-line conductivity meter C, the water taking valve does not work (is closed), and the first water circulation system is kept in a continuous or pulse circulation mode through the first power valve group so as to ensure that the water quality is stable or can quickly reach the standard when used next time (the repurified ultrapure water is qualified when detected by the on-line conductivity meter C).
The second water circulation system is formed by adding a circulation water port on the pure water tank T, except the water circulation loop of the ultra-purification system.
Specifically, the second water circulation system includes a second electromagnetic valve E and a second check valve F. One end of the second one-way valve F is connected with the pure water tank T, and the other end of the second one-way valve F is connected with the second electromagnetic valve E; the second check valve F has a function of preventing the backflow of pure water. The other end of the second electromagnetic valve E is connected to a pipeline between the on-line overflowing dual-wavelength ultraviolet lamp U and the on-line ultrapure column D. That is, the second water circulation system is connected to the pipeline after the on-line flow-through dual wavelength uv lamp U and before the on-line ultrapure column D. Thus, the second water circulation loop connected with the pure water tank T does not flow through the on-line ultrapure column D, does not cause extra loss to the service life of the on-line ultrapure column D, and does not obviously change the conductivity index of water stored in the pure water tank.
The ultrapure water preparation double-circulation device provided by the utility model performs circulation loop switching through the first electromagnetic valve A and the second electromagnetic valve E, the circulation pump P sucks pure water in the pure water tank T, the pure water flows through the on-line flow-through dual-wavelength ultraviolet lamp U for photo-oxidation and then flows back into the pure water tank T through the second water circulation system, so that the water stored in the pure water tank T is not in a dead water condition any more but is periodically sterilized by ultraviolet rays, the TOC index of total organic carbon of the pure water is obviously reduced, and an active effect on inhibiting the propagation of microorganisms is achieved. The water supply condition is greatly improved, and the method plays a critical role in stabilizing indexes of ultrapure water prepared in the later stage. Meanwhile, the workload of the total organic carbon TOC filter material except pure water is greatly reduced, so that the effects of prolonging the column efficiency and reducing the operation cost are achieved.
Preferably, the top of the pure water tank T is provided with a circulating water port, and the bottom of the pure water tank T is provided with a water outlet. The circulating water port is connected to the second water circulating system to drain the pure water to the top of the pure water tank T; the water outlet is connected to the circulating pump P to discharge water from the bottom of the pure water tank T, so as to facilitate sufficient water body circulation.
The first electromagnetic valve A and the second electromagnetic valve E are both power valves capable of switching flow directions, or the first electromagnetic valve A and the second electromagnetic valve E are both three-way reversing valves.
The double-circulation control method of the double-circulation equipment for preparing ultrapure water comprises the following steps that when a first water circulation system is in a pulse circulation mode, a second electromagnetic valve E is opened, and a first electromagnetic valve A is closed; and the circulating pump P is started, and the on-line overflowing type dual-wavelength ultraviolet lamp U is started to keep the water stored in the pure water tank T continuously circulating for 15-30min (different time lengths can be preset according to the size of the water tank) in the second water circulating loop through the second water circulating system. When the water storage continuous cycle timing in the pure water tank T is finished, the circulating pump P and the online overflowing type dual-wavelength ultraviolet lamp U are powered off, the second electromagnetic valve E is closed, and the first electromagnetic valve A is opened; and then, the circulating pump P and the online overflowing type dual-wavelength ultraviolet lamp U are electrified again until the water stored in the pure water tank T is switched back to the internal circulation state of the first water circulation system until the next circulation period, and the steps are repeated.
While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the utility model is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (2)
1. A double-circulation device for preparing ultrapure water is characterized by comprising a pure water tank, a first water circulation system and a second water circulation system, wherein the pure water tank is connected with an ultrapure water preparation control center; wherein the content of the first and second substances,
the first water circulating system comprises a circulating pump (P), an online overflowing type dual-wavelength ultraviolet lamp (U), an online ultrapure column (D), an online conductivity meter (C) and a first power valve group; the circulating pump (P) is connected with a pure water tank (T), the online overflowing type dual-wavelength ultraviolet lamp (U) is connected with the circulating pump (P) and an online ultrapure column (D), and the online ultrapure column (D) is connected with an online conductivity meter (C); the online conductivity meter (C) is connected with a water taking valve; the first power valve group comprises a first electromagnetic valve (A) and a first one-way valve (B) which are connected, and the other end of the first electromagnetic valve (A) is connected to a pipeline between the online conductivity meter (C) and the water intake valve; the other end of the first one-way valve (B) is connected to a pipeline between the pure water tank (T) and the circulating pump (P); when the water taking valve does not work, the first water circulation system keeps a pulse circulation mode through the first power valve group;
a second water circulation system comprising a second solenoid valve (E) and a second one-way valve (F); one end of the second one-way valve (F) is connected with the pure water tank (T), and the other end of the second one-way valve (F) is connected with the second electromagnetic valve (E); the other end of the second electromagnetic valve (E) is connected to a pipeline between the on-line overflowing dual-wavelength ultraviolet lamp (U) and the on-line ultrapure column (D).
2. The double-circulation equipment for ultrapure water preparation according to claim 1, wherein the top of the pure water tank (T) is provided with a circulation water port, and the bottom of the pure water tank (T) is provided with a water outlet; the circulating water port is connected to a second water circulating system, and the water outlet is connected to a circulating pump (P).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123194683.3U CN216549982U (en) | 2021-12-17 | 2021-12-17 | Double-circulation equipment for preparing ultrapure water |
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| CN202123194683.3U CN216549982U (en) | 2021-12-17 | 2021-12-17 | Double-circulation equipment for preparing ultrapure water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114960844A (en) * | 2022-07-19 | 2022-08-30 | 正帆百泰(苏州)科技有限公司 | Water taking device and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114960844A (en) * | 2022-07-19 | 2022-08-30 | 正帆百泰(苏州)科技有限公司 | Water taking device and system |
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