Deionized water preparation system

Abstract

The utility model discloses a deionized water preparation system which is provided with a raw water unit, a first-stage filtering unit, a softening unit, a second-stage filtering unit, a heat exchange unit, a third-stage filtering unit, a reverse osmosis unit, a dosing unit and a water storage unit which are connected in sequence, the sterilization branch is used for communicating the heat exchange unit with the raw water unit, the first backflow branch is used for communicating the reverse osmosis unit with the heat exchange unit, and the second backflow branch is used for communicating the water storage unit with the heat exchange unit. Impurities in a water body are filtered out through the multi-stage filtering unit, dissolved salt and other impurities are prevented from passing through the reverse osmosis unit by adopting a reverse osmosis method and utilizing the selective permeation characteristic that only water molecules are allowed to pass through of a semi-permeable membrane, and finally the pH value of the water body is adjusted through the dosing unit, so that the deionized water is prepared.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of deionized water, especially to a deionized water preparation system. BACKGROUND

[0002] Deionized water (Deionized Water, simply DI water) is also called pure water or highly pure water. It is obtained by removing dissolved minerals, organic matter, microorganisms and most ionic substances in water through a series of processing techniques, so that the electrical conductivity of the water is reduced to a very low level. Its resistivity can be as high as 18MΩ·cm (25℃) or more, which belongs to a kind of high-purity water. It has the characteristics of high purity, low conductivity, no impurities and good chemical stability.

[0003] In the pharmaceutical field, the purity and quality of drugs are crucial. In order to prepare high-purity drugs, high-purity solvents are needed, among which deionized water is one of the most commonly used solvents. Deionized water reaches a high-purity state by removing ionic substances such as cations and anions in water, thereby ensuring the accuracy of chemical reactions during drug preparation and the purity of the product. Therefore, it is necessary to design a deionized water preparation system to meet the needs of the pharmaceutical industry. SUMMARY

[0004] The embodiment of the present application provides a deionized water preparation system for realizing the preparation function of deionized water.

[0005] The embodiment of the present application provides a deionized water preparation system, which comprises:

[0006] A raw water unit has a raw water tank for storing raw water;

[0007] A first-stage filtration unit is in communication with the raw water tank;

[0008] A softening unit is in communication with the first-stage filtration unit;

[0009] A second-stage filtration unit is in communication with the softening unit;

[0010] A heat exchange unit is in communication with the second-stage filtration unit;

[0011] A sterilization branch is in communication between the outlet of the heat exchange unit and the raw water tank;

[0012] A third-stage filtration unit is in communication with the heat exchange unit;

[0013] A reverse osmosis unit is in communication with the third-stage filtration unit;

[0014] A dosing unit is in communication with the pipeline on the water production side of the reverse osmosis unit;

[0015] A first backflow branch communicates the reverse osmosis unit with the heat exchange unit;

[0016] A water storage unit communicates a water production side of the reverse osmosis unit;

[0017] A second backflow branch communicates a water outlet of the water storage unit with the heat exchange unit.

[0018] The above embodiment has the beneficial effect that impurities in the water body are filtered by the multi-stage filtering unit, then the reverse osmosis unit uses the reverse osmosis method to block the dissolved salt and other impurities by using the selective permeation characteristics of the semi-permeable membrane that only allows water molecules to pass through, and finally the dosing unit adjusts the PH value of the water body, thereby realizing the preparation of deionized water.

[0019] On the basis of the above embodiment, the embodiments of the present application can also be improved as follows:

[0020] In one of the embodiments of the present application: the raw water unit further comprises: a water inlet pipeline, a first valve is connected in series in the water inlet pipeline, a liquid level transmitter is installed on the raw water tank, and the liquid level transmitter is connected with the first valve through an electric control signal. The beneficial effect of this step is that it can realize the function of disconnecting the water inlet pipeline when the water level is too high and opening the water replenishing pipeline when the water level is too low.

[0021] In one of the embodiments of the present application: the sterilization branch is configured with a second valve, and a third valve is configured between the sterilization branch and the three-stage filtering unit. The beneficial effect of this step is that the switching of the opening and closing states of the second valve and the third valve realizes the switching of the system sterilization function and the normal water production function.

[0022] In one of the embodiments of the present application: the reverse osmosis unit comprises: an RO membrane reverse osmosis device, a concentrated water discharge branch, and a backwashing branch, the concentrated water discharge branch is connected to the concentrated water side of the RO membrane reverse osmosis device, and the backwashing branch is connected between the water production side and the concentrated water side of the RO membrane reverse osmosis device. The beneficial effect of this step is that the RO membrane reverse osmosis device can be flushed through the backwashing branch.

[0023] In one of the embodiments of the present application: the first backflow branch is configured with a fourth valve, and a fifth valve is configured between the first backflow branch and the water inlet of the water storage unit. The beneficial effect of this step is that the switching of the opening and closing states of the fourth valve and the fifth valve realizes the function of guiding the water production into the heat exchange unit.

[0024] In one of the embodiments of the present application: the second backflow branch is configured with a sixth valve, and a seventh valve is configured between the second backflow branch and the water outlet. The beneficial effect of this step is that the switching of the opening and closing states of the sixth valve and the seventh valve realizes the function of guiding the water production into the heat exchange unit. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the specific embodiments or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0026] Figure 1 is a principle diagram of a deionized water preparation system;

[0027] Figure 2 is a principle diagram of a raw water unit;

[0028] Figure 3 is a principle diagram of a first-stage filtration unit;

[0029] Figure 4 is a principle diagram of a softening unit;

[0030] Figure 5 is a principle diagram of a second-stage filtration unit;

[0031] Figure 6 is a principle diagram of a heat exchange unit;

[0032] Figure 7 is a principle diagram of a third-stage filtration unit;

[0033] Figure 8 is a principle diagram of a reverse osmosis unit;

[0034] Figure 9 is a principle diagram of a dosing unit;

[0035] Figure 10 is a principle diagram of a water storage unit.

[0036] Among them, 1 is a raw water unit, 101 is a raw water tank, 102 is a first valve, 103 is a liquid level transmitter;

[0037] 2 is a first-stage filtration unit, 201 is a multi-medium filter;

[0038] 3 is a softening unit, 301 is a salt tank, 302 is a softener;

[0039] 4 is a second-stage filtration unit, 401 is an activated carbon filter;

[0040] 5 is a heat exchange unit, 501 is a plate heat exchanger;

[0041] 6 is a sterilization branch, 601 is a second valve;

[0042] 7 is a third-stage filtration unit, 701 is a third valve, 702 is a precision filter;

[0043] 8 reverse osmosis unit, 801 RO membrane reverse osmosis device;

[0044] 9 dosing unit, 901 dosing tank;

[0045] 10 first reflux branch, 1001 fourth valve;

[0046] 11 water storage unit, 1101 fifth valve, 1102 water storage tank;

[0047] 12 second reflux branch, 1201 sixth valve, 1202 seventh valve. DETAILED DESCRIPTION

[0048] In the present application, unless otherwise explicitly specified and limited, the terms in the present application should be understood in a broad sense, for example, the connection can be fixed connection, or detachable connection or integral, can be directly connected, or indirectly connected through intermediate medium; if related to power, electronic equipment, can also be electrical connection or communication signal connection, etc. For those skilled in the art, different terms in the present application can be understood according to the specific meaning in the specific context, and the scope of the specific meaning should be limited to the function of the present application.

[0049] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0050] As Figures 1-10As shown, a kind of deionized water preparation system, comprising: raw water unit 1, first filtering unit 2, softening unit 301, second filtering unit 4, heat exchange unit 5, sterilization branch 6, third filtering unit 7, reverse osmosis unit 8, dosing unit 9, first reflux branch 10, water storage unit 11, second reflux branch 12, raw water unit 1 has for containing raw material water raw water tank 101, first filtering unit 2 with raw water tank 101 communication, softening unit 301 with first filtering unit 2 communication, second filtering unit 4 with softening unit 301 communication, heat exchange unit 5 with second filtering unit 4 communication, sterilization branch 6 is connected with the water outlet of heat exchange unit 5 and the backwater of raw water tank 101, third filtering unit 7 with heat exchange unit 5 communication, reverse osmosis unit 8 with third filtering unit 7 communication, dosing unit 9 with the pipeline of the water production side of reverse osmosis unit 8 communication, first reflux branch 10 is connected with reverse osmosis unit 8 and heat exchange unit 5, water storage unit 11 with the water production side of reverse osmosis unit 8 communication, second reflux branch 12 is connected with the water outlet of water storage unit 11 and heat exchange unit 5.

[0051] In some embodiments of the present application, as shown in Figure 2 The raw water unit 1 further includes: an inlet pipeline, a first valve 102 is connected in series in the inlet pipeline, the raw water tank 101 is provided with a liquid level transmitter 103, and the liquid level transmitter 103 is connected with the first valve 102 through an electrical control signal. The first valve 102 is an electric butterfly valve, which is connected with the inlet of the raw water tank 101 in series with a pneumatic butterfly valve. The liquid level transmitter 103 is first connected with a controller through an electrical control signal, and the controller is connected with the electric butterfly valve through an electrical control signal. The controller can be a PLC controller, an industrial computer, an industrial computer, etc. According to the signal of the liquid level transmitter 103, the controller controls the opening and closing of the first valve 102, so as to realize the function of disconnecting the inlet pipeline when the water level is too high and opening the inlet pipeline when the water level is too low.

[0052] In some embodiments of the present application, as shown in Figure 3 The first filtering unit 2 includes a multi-medium filter 201, which is a commonly used filtering device in the field. The inlet of the multi-medium filter 201 is connected with the raw water tank 101 through a first water pump.

[0053] In some embodiments of the present application, as shown in Figure 4 The softening water unit includes a salt tank 302 and a softener 303, which are commonly used softening devices in the field. The softener 303 is connected with the multi-medium filter 201 and the salt tank 302. The water softener uses ion exchange resin to remove hardness minerals (such as calcium and magnesium) in water. This process gradually depletes the exchange capacity of the resin. In order to restore the softening capacity of the resin, it is necessary to periodically regenerate using salt. The salt solution flows through the resin, replacing the calcium and magnesium ions on the resin, releasing sodium ions, so that the resin can be used for softening water again.

[0054] In some embodiments of the present application, as shown in Figure 5 The secondary filtration unit 4 includes an activated carbon filter 401, which is a commonly used device in the art, and the water inlet of the activated carbon filter 401 is communicated with the water outlet of the softener 303.

[0055] In some embodiments of the present application, as shown in Figure 6 The heat exchange unit 5 includes a plate heat exchanger 501, the water inlet of the plate heat exchanger 501 is communicated with the water outlet of the activated carbon filter 401, and the plate heat exchanger 501 is further connected with a steam branch and a condensate water branch. The steam branch is connected with a steam pipeline outside through a temperature air regulating valve, a pneumatic angle seat valve and a Y-shaped filter in series, and is used for passing steam into the heat exchanger and heating the water entering the heat exchanger through the water inlet. The condensate water branch is connected with an external discharge pipeline through a parallel connection of a trap valve and a manual ball valve, and is used for discharging the condensate water after the steam is liquefied.

[0056] In some embodiments of the present application, as shown in Figure 1 , 7 The sterilization branch 6 is provided with a second valve 602, and the sterilization branch 6 and the tertiary filtration unit 7 are provided with a third valve 701. The second valve 602 and the third valve 701 are both pneumatic butterfly valves, and the switching of the open and closed states of the second valve 602 and the third valve 701 realizes the switching of the system sterilization function and the normal water production function.

[0057] In some embodiments of the present application, as shown in Figure 7 The tertiary filtration unit 7 includes a precision filter 702, which is a commonly used device in the art, and the water inlet of the precision filter 702 is communicated with the water outlet of the heat exchanger through the third valve 701.

[0058] In some embodiments of the present application, as shown in Figure 8 The reverse osmosis unit 8 includes an RO membrane reverse osmosis device 801, a concentrated water discharge branch and a backwashing branch. The concentrated water discharge branch is connected to the concentrated water side of the RO membrane reverse osmosis device 801, and the backwashing branch is connected between the water production side and the concentrated water side of the RO membrane reverse osmosis device 801. The RO membrane reverse osmosis device 801 is communicated with the precision filter 702 through a second water pump, and the RO membrane reverse osmosis device 801 is a commonly used device in the art. An electric valve is arranged in the concentrated water discharge branch, and two manual ball valves are arranged in the backwashing branch. One of the manual ball valves is connected with the water production side, and the other manual ball valve is connected with the electric valve in parallel on the concentrated water side. The concentrated water discharge branch and the backwashing branch are both communicated with an external discharge pipeline through manual butterfly valves.

[0059] In some embodiments of the present application, as shown in Figure 9As shown, the dosing unit 9 includes a dosing tank 901 and a pH meter. Both the dosing tank 901 and the pH meter are commonly used devices in the field. The pH meter is electrically connected to the dosing tank 901. The pH meter controls the dosing amount of the dosing tank 901 according to the pH value of the product water, thereby adjusting the pH value of the product water to the set range.

[0060] In some embodiments of this application, such as Figure 1 , 10 As shown, the first return branch 10 is equipped with a fourth valve 1001, and a fifth valve 1101 is configured between the first return branch 10 and the inlet of the water storage unit 11. The fourth valve 1001 and the fifth valve 1101 are pneumatic butterfly valves. By switching the open and closed states of the fourth valve 1001 and the fifth valve 1101, the function of introducing the produced water into the heat exchange unit 5 or the water storage unit 11 is realized.

[0061] In some embodiments of this application, such as Figure 1 , 10 As shown, the water storage unit 11 includes a water storage tank 1102, and the inlet of the water storage tank 1102 is connected to the RO membrane reverse osmosis device 801 through the fifth valve 1101.

[0062] In some embodiments of this application, such as Figure 1 , 10 As shown, the second return branch 12 is equipped with a sixth valve 1201, and a seventh valve 1202 is configured between the second return branch 12 and the outlet. The sixth valve 1201 and the seventh valve 1202 are pneumatic butterfly valves. The outlet of the water storage tank 1102 is connected to the sixth valve 1201 and the seventh valve 1202 via a third water pump and a check valve, respectively. By switching the opening and closing states of the sixth valve 1201 and the seventh valve 1202, the function of introducing the produced water into the heat exchange unit 5 or the water storage unit 11 is realized.

[0063] Impurities in the water are filtered out by a multi-stage filtration unit (primary filtration unit 2, secondary filtration unit 4, and tertiary filtration unit 7). Then, the reverse osmosis unit 8 uses the reverse osmosis method, which utilizes the selective permeability of the semi-permeable membrane to allow only water molecules to pass through, preventing dissolved salts and other impurities from passing through. Finally, the pH value of the water is adjusted by the dosing unit 9, thereby achieving the preparation of deionized water.

[0064] The above is only an embodiment of the present application, and the common knowledge of specific structures and properties in the scheme is not described in detail, the ordinary skilled person in the art knows all the ordinary technical knowledge in the technical field of the present application before the application date or the priority date, can know all the prior art in the field, and has the ability to apply conventional experimental means before that date, the ordinary skilled person in the art can improve and implement the present scheme under the inspiration given in the present application, and some typical known structures or known methods should not be an obstacle for the ordinary skilled person in the art to implement the present application. It should be pointed out that, for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the present application.

Claims

1. A deionized water preparation system characterized by, The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device.

2. The deionized water preparation system of claim 1, wherein, The application relates to a water purification device.

3. The deionized water preparation system of claim 1, wherein, The application relates to a water purification device.

4. The deionized water preparation system of claim 1, wherein, The application relates to a water purification device.

5. The deionized water preparation system of claim 1, wherein, The application relates to a water purification device.

6. The deionized water preparation system of claim 1, wherein, The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. The application relates to a water purification device. 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