Purified water production system

Abstract

The utility model discloses a purified water production system which comprises a raw water unit, a filtering and softening unit, a heat exchange unit, a primary reverse osmosis unit, a secondary reverse osmosis unit, a first control valve group, a deionization unit, an ultrafiltration unit, a second control valve group and a purified water unit which are connected in sequence, the sterilization branch is used for communicating the heat exchange unit with the filtering and softening unit and the raw water unit. Raw water is softened and filtered through the filtering and softening unit, and impurities in the water body are fully filtered through primary reverse osmosis, secondary reverse osmosis, deionization and ultrafiltration respectively, so that purified water with high purity is obtained, and the requirements of the pharmaceutical industry are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of purified water, especially a purified water production system. BACKGROUND

[0002] Purified water is a kind of water that has been specially treated to remove most of the impurities in water. Its purity is between tap water and high-purity ultrapure water. The preparation process aims to reduce the content of mineral matter, organic matter, microorganisms and particulate impurities in water to meet the needs of specific industries, medical or laboratory.

[0003] In the pharmaceutical production process, many enterprises need to use purified water as raw material to produce drugs. Because ordinary water contains many impurities, including suspended solids, colloids, organic matter, microorganisms, etc., it cannot meet the needs of drug production. The preparation of purified water is a process of removing impurities and preventing pollution, which improves product quality by improving water quality. Therefore, it is necessary to develop purified water preparation equipment to meet the needs of the medical industry. SUMMARY

[0004] The application provides a purified water production system to realize the preparation function of purified water.

[0005] The application provides a purified water production system, which comprises:

[0006] A raw water unit has a raw water tank.

[0007] A filter softening unit is in communication with the liquid outlet of the raw water tank.

[0008] A heat exchange unit is in communication with the filter softening unit.

[0009] A sterilization branch is in communication with the filter softening unit and the raw water unit.

[0010] A first reverse osmosis unit is in communication with the heat exchange unit, and the first reverse osmosis unit has a first backflow branch in communication with the heat exchange unit.

[0011] A second reverse osmosis unit is in communication with the water outlet of the first reverse osmosis unit, and the second reverse osmosis unit has a second backflow branch and a third backflow branch, wherein the second backflow branch is in communication with the heat exchange unit, and the third backflow branch is connected with the water inlet of the second reverse osmosis unit.

[0012] A first control valve group is in communication with the second reverse osmosis unit.

[0013] A deionization unit is in communication with the first control valve group.

[0014] an ultrafiltration unit, in communication with the deionization unit;

[0015] a second control valve group, in communication with the ultrafiltration unit, the second control valve group being in communication with the second backflow branch through a fourth backflow branch;

[0016] a purified water unit having a purified water tank, the purified water tank being connected with the second control valve group.

[0017] The above embodiment has the beneficial effect that the raw water is softened and filtered by the filter softening unit, and the impurities in the water body are fully filtered by the first reverse osmosis, the second reverse osmosis, the deionization and the ultrafiltration, so that the purified water with high purity is obtained to meet the needs of the pharmaceutical industry.

[0018] On the basis of the above embodiment, the embodiment of the present application can also be improved as follows:

[0019] In one embodiment of the present application: the filter softening unit comprises a multi-medium filter, a softener and an activated carbon filter connected in sequence.

[0020] In one embodiment of the present application: further comprising: a first dosing unit, in communication with the pipeline between the filter softening unit and the heat exchange unit, the first dosing unit being used for adding sodium bisulfite into the pipeline. The beneficial effect of this step is to reduce the residual chlorine in the water body to avoid the adverse effects of the residual chlorine in the water body on the RO membrane.

[0021] In one embodiment of the present application: further comprising: a second dosing unit, in communication with the pipeline between the first dosing unit and the heat exchange unit, the second dosing unit being used for adding sodium hydroxide into the pipeline. The beneficial effect of this step is to adjust the PH value of the water body and remove carbon dioxide in the water body to avoid the influence of carbon dioxide on the water body conductivity.

[0022] In one embodiment of the present application: further comprising: a security filter, connected in the pipeline between the first dosing unit and the second dosing unit. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed 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.

[0024] Figure 1 a schematic diagram of a purified water production system;

[0025] Figure 2 a schematic diagram of a raw water unit;

[0026] Figure 3 schematic diagram of a filter softening unit;

[0027] Figure 4 schematic diagram of a heat exchange unit;

[0028] Figure 5 schematic diagram of a first reverse osmosis unit;

[0029] Figure 6 schematic diagram of a second reverse osmosis unit;

[0030] Figure 7 schematic diagram of a first control valve group, a second control valve group and a purified water unit;

[0031] Figure 8 schematic diagram of a deionization unit and an ultrafiltration unit.

[0032] 1, raw water unit, 101, raw water tank, 102, raw water pipeline, 2, filter softening unit, 201, multi-medium filter, 202, softener, 203, activated carbon filter, 3, heat exchange unit, 301, heat exchanger, 302, steam branch, 303, condensate water branch, 4, sterilization branch, 5, first reverse osmosis unit, 501, first reflux branch, 502, first RO membrane reverse osmosis device, 503, first external discharge branch, 6, second reverse osmosis unit, 601, second reflux branch, 602, third reflux branch, 603, second RO membrane reverse osmosis device, 604, second external discharge branch connection, 7, first control valve group, 8, deionization unit, 801, EDI electric deionization device, 9, ultrafiltration unit, 901, UF ultrafiltration device, 10, second control valve group, 1001, fourth reflux branch, 11, purified water unit, 1101, purified water tank, 12, first dosing unit, 13, second dosing unit, 14, safety filter. DETAILED DESCRIPTION

[0033] In the present application, unless otherwise explicitly specified and limited, the terms in the present application should be understood in a broad sense, such as connection, which can be fixed connection, detachable connection or integral, which can be directly connected or indirectly connected through an intermediate medium. If it involves power, electronic equipment, it can also be an electrical connection or a communication signal connection. For ordinary skilled in the art, different terms in the present application can be understood according to the specific meaning, and the scope of the specific meaning should be limited to the function of the present application.

[0034] In the description of the present application, it should be understood that the orientation terms or position relationship descriptions are based on the orientation or position relationship shown in the drawings or based on the actual use orientation or position relationship, only for the convenience of describing the content of the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0035] As shown in Figure 1 A purified water production system, comprising: a raw water unit 1, a filtration and softening unit 2, a heat exchange unit 3, a sterilization branch 4, a first reverse osmosis unit 5, a second reverse osmosis unit 6, a first control valve group 7, a deionization unit 8, an ultrafiltration unit 9, a second control valve group 10, a purified water unit 11, the raw water unit 1 has a raw water tank 101, the filtration and softening unit 2 is communicated with the liquid outlet of the raw water tank 101, the heat exchange unit 3 is communicated with the filtration and softening unit 2, the sterilization branch 4 communicates the heat exchange unit 3 with the filtration and softening unit 2 and the raw water unit 1, the first reverse osmosis unit 5 is communicated with the heat exchange unit 3, the first reverse osmosis unit 5 has a first backflow branch 501, the first backflow branch 501 is communicated with the heat exchange unit 3, the second reverse osmosis unit 6 is communicated with the water outlet of the first reverse osmosis unit 5, the second reverse osmosis unit 6 has a second backflow branch 601 and a third backflow branch 602, the second backflow branch 601 is communicated with the heat exchange unit 3, the third backflow branch 602 is connected with the water inlet of the second reverse osmosis unit 6, the first control valve group 7 is communicated with the second reverse osmosis unit 6, the deionization unit 8 is communicated with the first control valve group 7, the ultrafiltration unit 9 is communicated with the deionization unit 8, the second control valve group 10 is communicated with the ultrafiltration unit 9, the second control valve group 10 is communicated with the second backflow branch 601 through a fourth backflow branch 1001, and the purified water unit 11 has a purified water tank 1101, the purified water tank 1101 is connected with the second control valve group 10.

[0036] In some embodiments of the present application, as shown in Figure 2 The raw water tank 101 is circumscribed by a raw water pipeline 102, the raw water pipeline 102 controls the water flow through the control valve, the water outlet of the raw water tank 101 is connected with the filtration and softening unit 2 through the water pump, the raw water tank 101 is also provided with a liquid level sensor, the liquid level sensor is connected with the water pump through the electric control signal, specifically, the liquid level sensor is first connected with the controller through the electric control signal, the controller is connected with the water pump through the electric control signal, the controller adopts a PLC controller, an industrial computer or an industrial computer control device, when the liquid level is lower than the set value, the water pump is controlled to be closed, the raw water tank 101 is replenished by the raw water pipeline 102, when the liquid level is too high, the control valve is closed to the raw water pipeline 102.

[0037] In some embodiments of the present application, as shown in Figure 3As shown, the filter softening unit 2 comprises a multi-medium filter 201, a softener 202 and an activated carbon filter 203 connected in sequence. The water inlet of the multi-medium filter 201 is connected with the water pump. The water outlet of the multi-medium filter 201 is connected with the water inlet of the softener 202. The water outlet of the softener 202 is connected with the water inlet of the activated carbon filter 203. The softener 202 is further provided with a salt tank. The water outlet of the salt tank is communicated with the softener 202.

[0038] In some embodiments of the present application, as shown in Figure 1 As shown, the purified water production system further comprises a first dosing unit 12. The first dosing unit 12 comprises a first dosing tank. The first dosing unit 12 is communicated with the pipeline between the filter softening unit 2 and the heat exchange unit 3. The first dosing unit 12 is used for adding sodium bisulfite into the pipeline. The residual chlorine in the water body is reduced by the sodium bisulfite, so as to avoid the adverse effect of the residual chlorine in the water body on the RO membrane.

[0039] In some embodiments of the present application, as shown in Figure 1 As shown, the purified water production system further comprises a second dosing unit 13. The second dosing unit 13 comprises a second dosing tank. The second dosing unit 13 is communicated with the pipeline between the first dosing unit 12 and the heat exchange unit 3. The second dosing unit 13 is used for adding sodium hydroxide into the pipeline. The PH value of the water body is adjusted by the sodium hydroxide, and the carbon dioxide in the water body is removed, so as to avoid the influence of the carbon dioxide on the water body conductivity.

[0040] In some embodiments of the present application, as shown in Figure 1 As shown, the purified water production system further comprises a security filter 14 connected in the pipeline between the first dosing unit 12 and the second dosing unit 13.

[0041] In some embodiments of the present application, as shown in Figure 4 As shown, the heat exchange unit 3 adopts a plate heat exchanger 301. The plate heat exchanger 301 is connected with a steam branch 302 and a condensate water branch 303. The steam branch 302 is used for introducing steam for heating the softened water into the heat exchanger 301. The condensate water generated by the steam cooling and condensation is discharged through the condensate water branch 303. The water inlet of the heat exchanger 301 is communicated with the water outlet of the security filter 14. The water outlet of the heat exchanger 301 is communicated with the primary reverse osmosis filtration unit.

[0042] In some embodiments of the present application, as shown in Figure 1 As shown, the sterilization branch 4 is connected with the water outlet of the heat exchanger 301 through a pipeline. The sterilization branch 4 is provided with a valve for controlling the on-off of the sterilization branch 4. The sterilization branch 4 is communicated with the activated carbon filter 203 and the raw water tank 101.

[0043] In some embodiments of the present application, as shown in Figure 5As shown, the first reverse osmosis filtration unit includes a first RO membrane reverse osmosis device 502, a water outlet of the first RO membrane reverse osmosis device 502 is connected with the second reverse osmosis unit 6, a concentrated water outlet of the first RO membrane reverse osmosis device 502 is respectively connected with a first reflux branch 501 and a first external discharge branch 503, the first external discharge branch 503 is used for discharging concentrated water, the first reflux branch 501 is communicated with a water inlet of the heat exchanger 301, and through the first reflux branch 501, the concentrated water can be used to generate sterilization steam or perform secondary reverse osmosis filtration to improve the yield of purified water.

[0044] In some embodiments of the present application, as shown in Figure 6 As shown, the second reverse osmosis unit 6 includes a second RO membrane reverse osmosis device 603, a water outlet of the second RO membrane reverse osmosis device 603 is communicated with the first control valve group 7, a concentrated water outlet of the second RO membrane reverse osmosis device 603 is connected with the first control valve group 7 through a second reflux branch 601, and the first control valve group 7 connects the second reflux branch 601 with the water inlet of the heat exchanger 301 and connects the second reflux branch 601 with a second external discharge branch 604, the concentrated water outlet of the second RO membrane reverse osmosis device 603 is also connected with a water inlet of the second RO membrane reverse osmosis device 603 through a third reflux branch 602, and a one-way valve is arranged in the third reflux branch 602, so that the concentrated water can be refluxed to the second RO membrane reverse osmosis device 603 for further filtration and recovery.

[0045] In some embodiments of the present application, as shown in Figure 7 As shown, the first control valve group 7 and the second control valve group 10 are the same in structure, and the first control valve group 7 is taken as an example, the first control valve group 7 has an interface S1, an interface S2, an interface S3, an interface S4, an interface S5, an interface S6 and an interface S7, wherein the interface S1 is connected with the second control valve group 10 through a fourth reflux branch 1001, a one-way valve is arranged in the fourth reflux branch 1001, the one-way valve enables liquid to flow only from the second control valve group 10 to the first control valve group 7, the interface S2 is connected with the second reflux branch 601, the interface S3 is connected with the second external discharge branch 604, the interface S4 is connected with a third external discharge branch, a sampling valve is further arranged in the third external discharge branch, the interface S5 is connected with a water outlet of the second RO membrane reverse osmosis device 603, the interface S6 is connected with a conductivity meter and other detection equipment, and the interface S1 and the interface S7 are respectively provided with pneumatic normally closed valves, the interface S3 is provided with a pneumatic normally open valve, and the interface S4 is provided with a diaphragm valve.

[0046] In some embodiments of the present application, as shown in Figure 8As shown, the deionization unit 8 adopts an EDI electric deionization device 801, and the ultrafiltration unit 9 adopts an UF ultrafiltration device 901, the water outlet of the UF ultrafiltration device 901 is connected with the interface S2 of the second control valve group 10, and the interface S1 of the second control valve group 10 is connected with the raw water tank 101.

[0047] The purified water production system can soften and filter raw water through the filtering and softening unit 2, and can fully filter impurities in water through the first reverse osmosis unit, the second reverse osmosis unit, the deionization unit and the ultrafiltration unit, so that purified water with high purity is obtained, and the demand of the pharmaceutical industry is met.

[0048] The above is only an embodiment of the present application, and the well-known specific structure and characteristics and other common knowledge in the scheme are not described in detail, the ordinary skilled in the art knows all the ordinary technical knowledge in the technical field of the present application before the filing date or the priority date, can know all the prior art in the field and has the ability to apply conventional experimental means before the date, the ordinary skilled in the art can improve and implement the present scheme under the inspiration given by the present application combined with their own ability, and some typical known structures or known methods should not be an obstacle for the ordinary skilled 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, and these will not affect the effect and practicality of the present application.

Claims

1. A purified water production system, characterized by comprising: The application relates to a water purification system, comprising: a raw water unit having a raw water tank; a filter-softening unit in communication with a liquid outlet of the raw water tank; a heat exchange unit in communication with the filter-softening unit; a sterilization branch in communication with the heat exchange unit, the filter-softening unit and the raw water unit; a primary reverse osmosis unit in communication with the heat exchange unit, the primary reverse osmosis unit having a first backflow branch in communication with the heat exchange unit; a secondary reverse osmosis unit in communication with a water outlet of the primary reverse osmosis unit, the secondary reverse osmosis unit having a second backflow branch in communication with the heat exchange unit and a third backflow branch connected to a water inlet of the secondary reverse osmosis unit; a first control valve group in communication with the secondary reverse osmosis unit; a deionization unit in communication with the first control valve group; an ultrafiltration unit in communication with the deionization unit; a second control valve group in communication with the ultrafiltration unit, the second control valve group being in communication with the second backflow branch through a fourth backflow branch; a purified water unit having a purified water tank connected to the second control valve group.

2. The purified water production system according to claim 1, characterized by The filter-softening unit comprises a multi-medium filter, a softener and an activated carbon filter connected in sequence.

3. The purified water production system according to claim 1, characterized by The application further comprises: a first dosing unit in communication with a pipeline between the filter-softening unit and the heat exchange unit, the first dosing unit being used for adding sodium bisulfite into the pipeline.

4. The purified water production system according to claim 3, characterized by The application further comprises: a second dosing unit in communication with a pipeline between the first dosing unit and the heat exchange unit, the second dosing unit being used for adding sodium hydroxide into the pipeline.

5. The purified water production system according to claim 4, wherein The application further comprises: a safety filter connected to the pipeline between the first dosing unit and the second dosing unit.

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