CN116443990A - Purified water preparation system and control method - Google Patents

Purified water preparation system and control method Download PDF

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Publication number
CN116443990A
CN116443990A CN202310499642.XA CN202310499642A CN116443990A CN 116443990 A CN116443990 A CN 116443990A CN 202310499642 A CN202310499642 A CN 202310499642A CN 116443990 A CN116443990 A CN 116443990A
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CN
China
Prior art keywords
pipeline
heat exchange
output
temperature
ultrafiltration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310499642.XA
Other languages
Chinese (zh)
Inventor
崔吉想
欧阳健
张耀良
王敦品
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuxi Yaoming Biotechnology Co ltd
Original Assignee
Wuxi Yaoming Biotechnology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuxi Yaoming Biotechnology Co ltd filed Critical Wuxi Yaoming Biotechnology Co ltd
Priority to CN202310499642.XA priority Critical patent/CN116443990A/en
Publication of CN116443990A publication Critical patent/CN116443990A/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/145—Ultrafiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/16—Feed pretreatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/18—Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/22—Controlling or regulating
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/02—Non-contaminated water, e.g. for industrial water supply
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/02—Temperature
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/046—Recirculation with an external loop

Abstract

The invention relates to a purified water preparation system and a control method, wherein, the system comprises a source water storage tank, heat exchange equipment, ultrafiltration equipment, a first pipeline, a second pipeline, a switch assembly, a temperature measuring assembly and a main control module; the output end of the source water storage tank is connected with the input end of the heat exchange device, the output end of the heat exchange device is respectively connected with the input end of the first pipeline and the input end of the second pipeline, the output end of the first pipeline is connected with the input end of the ultrafiltration device, and the output end of the second pipeline is connected with the reflux end of the source water storage tank; the main control module is connected with the switch assembly and the temperature measuring assembly respectively, the temperature measuring assembly is used for detecting the temperature of liquid output by the heat exchange equipment, and the switch assembly is used for controlling the on-off of the first pipeline and the second pipeline respectively. The heat exchange equipment combines with the corresponding control method and has the characteristics of good performance, high stability, long service life and effective guarantee of the maximum effect of the ultrafiltration equipment.

Description

Purified water preparation system and control method
Technical Field
The invention relates to the technical field of purified water preparation, in particular to a purified water preparation system and a control method.
Background
In the prior art, in the preparation equipment for purifying water by using ultrafiltration equipment, a water source to be prepared is usually directly conveyed to the ultrafiltration equipment for preparation, however, the ultrafiltration equipment can achieve optimal filtration efficiency only when treating the water source with the temperature of about 25 ℃, and the temperature of the water source to be prepared is usually changed along with the change of air temperature, and cannot be maintained at about 25 ℃, for example: the actual water temperature of the source water in winter and summer is 25 deg.c off.
If the temperature supplied to the production plant is below the standard temperature, it only affects the treatment efficiency of the ultrafilter. However, if the temperature supplied to the production facility is higher than the standard temperature, the ultrafilter may be damaged.
There is an urgent need for a purified water preparation system that can solve the above problems to prepare purified water.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to overcome the drawbacks of the prior art, and to provide a purified water preparation system with good performance, high stability, and effective guarantee of maximum effectiveness of ultrafiltration apparatuses.
In order to achieve the above object, the purified water preparation system of the present invention is as follows:
the purified water preparation system is mainly characterized by comprising a source water storage tank, heat exchange equipment, ultrafiltration equipment, a first pipeline, a second pipeline, a switch assembly, a temperature measuring assembly and a main control module;
the output end of the source water storage tank is connected with the input end of the heat exchange device, the output end of the heat exchange device is respectively connected with the input end of the first pipeline and the input end of the second pipeline, the output end of the first pipeline is connected with the input end of the ultrafiltration device, and the output end of the second pipeline is connected with the reflux end of the source water storage tank;
the main control module is respectively connected with the switch assembly and the temperature measuring assembly, the temperature measuring assembly is used for detecting the temperature of liquid output by the heat exchange equipment, and the switch assembly is used for respectively controlling the on-off of the first pipeline and the second pipeline.
The purified water preparation system comprises a first valve and a second valve, wherein the first valve is arranged on the first pipeline, the second valve is arranged on the second pipeline, and the control end of the first valve and the control end of the second valve are respectively connected with the main control module.
The purified water preparation system further comprises a filter assembly, and the output end of the heat exchange device is connected with the input end of the first pipeline and the input end of the second pipeline through the filter assembly respectively.
The purified water preparation system comprises a plurality of filters, wherein the input ends of the filters jointly form the input end of the filter assembly to be connected with the output end of the heat exchange equipment, and the output ends of the filters jointly form the output end of the filter assembly to be connected with the input end of the first pipeline and the input end of the second pipeline.
The purified water preparation system, wherein the filter is a self-cleaning filter.
The purified water preparation system further comprises a first pump, wherein the first pump is arranged between the output end of the source water storage tank and the input end of the heat exchange device.
The purified water preparation system further comprises a second pump, wherein the second pump is connected with the output end of the ultrafiltration device.
The purified water preparation system, wherein the ultrafiltration equipment comprises a plurality of ultrafilters and an ultrafiltration tank;
the input ends of the ultrafilters jointly form the input end of the ultrafiltration device, the output ends of the ultrafilters are connected with the input end of the ultrafiltration tank, and the output end of the ultrafiltration tank forms the output end of the ultrafiltration device.
The purified water preparation system comprises a temperature measuring assembly, wherein the temperature measuring assembly comprises a temperature sensor, the temperature sensor is arranged at the output end of the heat exchange equipment, and the temperature sensor is connected with the main control module.
The purified water preparation system is characterized in that the main control module is composed of a programmable logic controller.
The pure water preparation method based on the purified water preparation system is mainly characterized by comprising the following steps of:
the temperature measuring component detects the temperature of the liquid output by the heat exchange equipment;
when the temperature of the liquid output by the heat exchange equipment is detected to be not in accordance with a preset temperature interval of the system, the first pipeline is controlled to be closed, and the second pipeline is controlled to circulate, so that the liquid output by the heat exchange equipment flows back to the source water storage tank and does not flow to the ultrafiltration equipment; when the temperature of the liquid output by the heat exchange equipment is detected to be in accordance with a preset temperature interval of the system, the first pipeline is controlled to circulate, so that the liquid output by the heat exchange equipment flows to the ultrafiltration equipment.
The pure water preparation method, wherein the method further comprises the following steps: when the temperature of the liquid output by the heat exchange equipment is detected to be in accordance with a preset temperature interval of a system, the opening proportion of the first pipeline and the second pipeline is controlled according to the preset proportion of the system, so that one part of the liquid output by the heat exchange equipment flows to the ultrafiltration equipment, and the other part of the liquid flows back to the source water storage tank.
The purified water preparation system and the control method have the beneficial effects that:
through setting up heat exchange device, temperature measurement subassembly and the second pipeline that flows back to the source water storage tank in purified water preparation system for can be after guaranteeing that the export of heat exchanger is stable and reach the requirement, send into ultrafiltration device again and handle, in order to ensure that ultrafiltration device can keep operating in the best filtration efficiency state, effectively avoid leading to the damage of ultrafiltration device because of the water source temperature is unstable, the purified water preparation treatment process before the ultrafiltration of realization that cooperates corresponding control method can be better. The purified water preparation system and the control method have the characteristics of good performance, high stability, long service life and effective guarantee of the maximum effect of the ultrafiltration equipment.
Drawings
The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.
FIG. 1 is a schematic block diagram of a purified water production system of the present invention.
Reference numerals
1. Source water storage tank
2. Heat exchange device
3. First pipeline
4. Second pipeline
5. First valve
6. Second valve
7. Filter device
8. First pump
9. Second pump
10. Ultra-filter
11. Ultrafiltration tank
Detailed Description
The invention is further described with reference to the following detailed description in order to make the technical means, the inventive features, the achieved objects and the effects of the invention easy to understand. The present invention is not limited to the following examples.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the invention, are not intended to be critical to the essential characteristics of the invention, but are intended to fall within the spirit and scope of the invention.
As shown in fig. 1, the purified water preparation system in this embodiment includes a source water storage tank 1, a heat exchange device 2, an ultrafiltration device, a first pipeline 3, a second pipeline 4, a switch assembly, a temperature measuring assembly and a main control module;
the output end of the source water storage tank 1 is connected with the input end of the heat exchange device 2, the output end of the heat exchange device 2 is respectively connected with the input end of the first pipeline 3 and the input end of the second pipeline 4, the output end of the first pipeline 3 is connected with the input end of the ultrafiltration device, and the output end of the second pipeline 4 is connected with the reflux end of the source water storage tank 1;
the main control module is respectively connected with the switch assembly and the temperature measuring assembly, the temperature measuring assembly is used for detecting the temperature of liquid output by the heat exchange equipment 2, and the switch assembly is used for respectively controlling the on-off of the first pipeline 3 and the second pipeline 4.
In this embodiment, the temperature of the water source output from the source water storage tank 1 may be raised or lowered by the heat exchange device 2, so as to adjust the temperature of the water source conveyed to the ultrafiltration device to a preset temperature range, in order to avoid unstable temperature of the water source output from the heat exchange device 2 when the heat exchange device 2 just begins to work, the system detects the temperature of the water source output from the heat exchange device 2 by using the temperature measuring component, when the water temperature does not reach the preset temperature range (for example, the actual water temperature of the source water in winter and summer deviates from the preset temperature range, the preset temperature range may be set within 25 ℃ ± 2 ℃ in practical implementation), the second pipeline 4 is opened to close the first pipeline 3, so that the water source regulated by the heat exchange device 2 is conveyed back to the source water storage tank 1, and when the water temperature reaches the preset temperature range, the first pipeline 3 is opened to close the second pipeline 4, so that the water source regulated by the heat exchange device 2 is conveyed to the ultrafiltration device for filtration.
In specific implementation, when the temperature of the source water is higher in summer and needs to be reduced, the heat exchange device 2 is filled with chilled water to reduce the temperature of the source water, and when the temperature of the source water is lower in winter and needs to be increased, the heat exchange device 2 is filled with hot water or steam to increase the temperature of the source water.
In a preferred embodiment, chilled water at 7-12 ℃ is typically used as the refrigerant. When hot water is used as a heating medium, the temperature of the hot water is optimally selected to be 40-65 ℃. When the heat exchanger is actually used, the heat exchanger is filled with chilled water to cool the source water when the source water temperature is higher in summer. When the source water temperature is lower in winter, the heat exchanger is filled with hot water or steam to heat the source water. The water temperature entering the ultrafilter 10 is always maintained at 25 c 2 c.
In the process of preparing purified water, the water treated by the heat exchange equipment 2 can be returned to the source water storage tank 1 through a circulation loop, and then whether the temperature is required to be increased or decreased is judged according to the actual water temperature measured by the temperature measuring component, so that the heating medium or the cooling medium is switched into the heat exchanger for temperature adjustment. The water temperature in the source water tank 1 is changed with the outside air temperature, so frequent switching of the refrigerant and the heating medium in the heat exchanger generally does not occur. The heat exchange device 2 (i.e., the heat exchanger) can smoothly control the water temperature so as to fluctuate around a desired temperature when the purified water preparation system is in a water producing operation. After the water in the circulation loop reaches the required water temperature, the water is cut into the ultrafilter 10 for treatment, so that the water deviating from 25+/-2 ℃ is prevented from entering the ultrafiltration equipment, and the working efficiency and the service life of the ultrafiltration equipment are prevented from being influenced.
In this embodiment, the switch assembly includes a first valve 5 and a second valve 6, the first valve 5 is disposed on the first pipeline 3, the second valve 6 is disposed on the second pipeline 4, and a control end of the first valve 5 and a control end of the second valve 6 are respectively connected with the main control module.
In this embodiment, the purified water preparation system further comprises a filter assembly, through which the output of the heat exchange device 2 is connected to the input of the first pipe 3 and the input of the second pipe 4, respectively.
In this embodiment, the filter assembly comprises a plurality of filters 7, the input ends of the filters 7 jointly form the input end of the filter assembly to be connected with the output end of the heat exchange device 2, and the output ends of the filters 7 jointly form the output end of the filter assembly to be connected with the input end of the first pipeline 3 and the input end of the second pipeline 4.
In this embodiment, the filter 7 is a self-cleaning filter. The filtering precision of the self-cleaning filter is 100-200 mu m, and the interior of the self-cleaning filter is used for filtering particles larger than the pore diameter of the filter screen through the filter screen. The dirt removing brush is arranged outside the filter screen, so that the dirt removing brush can automatically brush off and clean off the trapped particles outside the filter screen at regular time. Other forms of filters may be used in place of the self-cleaning filter in other embodiments, such as: bag filters and laminated filters.
The water coming out of the source water storage tank 1 through the heat exchanger and the filter can be selectively entered into the ultrafiltration device or returned to the source water storage tank 1 by switching the first valve 5 and the second valve 6.
Through setting up the filter at the front end of ultrafiltration apparatus, can realize preliminary interception large granule insoluble matter, prevent the membrane silk in the filter of damage back end, realize redundancy through setting up two in this embodiment the filter to realize that the system is continuous to produce water and is not shut down when overhauling, washing.
In this embodiment, the purified water preparation system further comprises a first pump 8, said first pump 8 being arranged between the output of the source water storage tank 1 and the input of the heat exchange device 2.
In this embodiment, the purified water preparation system further comprises a second pump 9, said second pump 9 being connected to the output of the ultrafiltration device.
In this embodiment, the ultrafiltration apparatus comprises a plurality of ultrafilters 10 and an ultrafiltration tank 11;
the input ends of the two ultrafilters 10 jointly form the input end of the ultrafiltration device, the output ends of the two ultrafilters 10 are connected with the input end of the ultrafiltration tank 11, and the output end of the ultrafiltration tank 11 forms the output end of the ultrafiltration device.
In this embodiment, the temperature measuring component includes a temperature sensor, where the temperature sensor is disposed at an output end of the heat exchange device 2, and the temperature sensor is connected with the main control module.
When in implementation, whether the water source temperature output by the output end of the heat exchange equipment 2 detected by the temperature sensor meets the preset requirement or not is used for judging how to control the switch of the switch assembly so as to realize the selection of the liquid circulation path. And control of the operating mode of the heat exchange device 2 is achieved.
In other embodiments, an additional temperature sensor may be provided to detect the temperature of the liquid in the source water tank 1, and the heating/cooling condition of the heat exchanger may be switched according to the temperature determination value.
In this embodiment, the master control module is constituted by a programmable logic controller (i.e., PLC). In other embodiments, the main control module may be formed by other control elements that can achieve the same function. The main control module only needs to receive the temperature detected by the temperature measuring assembly, and then controls the corresponding valve switch according to the temperature to change the flow direction of the water flow. In some embodiments the master control module may also be connected to the heat exchange device 2 and adjust the operating mode of the heat exchange device 2 based on the detected temperature.
The purified water preparation system in the above embodiment is provided with the circulation pipeline formed by the second pipeline 4 and other components in front of the ultrafiltration device, so as to realize that when the raw water temperature is detected to reach the preset temperature requirement after being treated by the heat exchange device 2, the raw water is conveyed to the ultrafiltration device for filtration (namely, the source water is required to be heated and cooled in winter and summer, so that the water temperature of the RO membrane entering the ultrafiltration device and the inside of the ultrafiltration device is about 25 ℃), and the membrane device in the water treatment process can exert the maximum effect.
When the system is in a stopped state and enters a production state, the heat exchange device 2 cannot instantaneously regulate the required temperature, but has a large fluctuation in the initial stage. This fluctuation lowers the temperature down, only affecting the treatment efficiency of the film. However, excessive temperatures can damage the ultrafilter 10 when the oscillations are upward. It is desirable to try to avoid such fluctuations in the water temperature entering the ultrafilter 10.
By using the circulation loop formed by the second pipeline 4, water can still return to the source water storage tank 1 at the initial stage of the action of the heat exchanger, and is switched into the ultrafiltration device after the outlet water temperature is stable, so that the problem that the output water temperature of the heat exchanger is not stable at the beginning although the heat exchanger starts to act when the water pump of the source water tank is suddenly started after the purified water preparation system does not work for a long time can be effectively solved. It can be ensured to the greatest extent that the water entering the ultrafiltration unit is at a proper temperature, and does not cause any damage to the ultrafilter 10, avoiding the problems that the efficiency of the ultrafilter 10 is affected by low temperature and the ultrafilter 10 is damaged by high temperature.
In the purified water production system of this embodiment, after a circulation circuit is provided before ultrafiltration, when the temperature is in a fluctuating period, water can be switched by a regulating valve to enter the ultrafiltration apparatus or return to the source water storage tank 1. Always ensures that the water entering the ultrafiltration equipment is in the required temperature range, thereby not only improving the efficiency of membrane treatment, but also effectively avoiding the risk of high temperature on the membrane. Because the circulation loop operates to make the loop in a turbulent flushing state, the water containing residual chlorine can be conveyed to each unit, and the concentration of sodium hypochlorite in the source water storage tank 1 can be uniform in both production and internal circulation, so that the bacteriostasis of the source water is in an optimal state.
The purified water preparation system in the above-described embodiment may perform the pure water preparation method as follows:
after the system starts to work, the temperature measuring component detects the temperature of the liquid output by the heat exchange equipment;
when the temperature of the liquid output by the heat exchange equipment is detected to be not in accordance with a preset temperature interval of the system, the first pipeline is controlled to be closed, and the second pipeline is controlled to circulate, so that the liquid output by the heat exchange equipment flows back to the source water storage tank and does not flow to the ultrafiltration equipment; when the temperature of the liquid output by the heat exchange equipment is detected to be in accordance with a preset temperature interval of the system, the first pipeline is controlled to circulate, so that the liquid output by the heat exchange equipment flows to the ultrafiltration equipment.
In some implementations, when the temperature of the liquid output by the heat exchange device is detected to be in accordance with a preset temperature interval of the system, the first pipeline can be selectively controlled to be fully opened, and the second pipeline can be selectively closed, so that the liquid output by the heat exchange device flows to the ultrafiltration device, and the opening proportion of the first pipeline and the second pipeline can be controlled according to the preset proportion of the system, so that one part of the liquid output by the heat exchange device flows to the ultrafiltration device, and the other part flows back to the source water storage tank. And further, the uniformity of the concentration of sodium hypochlorite in the source water storage tank 1 can be uniform by utilizing the liquid circulated to the source water storage tank, so that the bacteriostasis of the source water is in an optimal state.
In a preferred embodiment, when the temperature of the liquid output by the heat exchange device is detected to be in accordance with the preset temperature interval of the system, the water source of 70% is controlled to be delivered to the ultrafiltration device, and the water source of 30% is controlled to be delivered back to the source water storage tank. The specific distribution proportion can be preset in the system according to actual conditions.
Since the circulation circuit in the purified water production system of the above embodiment can circulate the whole circulation even when the system is not producing water in a production state, the circulation circuit is in a circulation state for a long time, and thus it is possible to be able to be used to uniformly control the uniformity of the concentration of sodium hypochlorite in the source water tank 1 to ensure that the system starts to reduce the microbial load from the source.
The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention without requiring creative effort by one of ordinary skill in the art. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims (10)

1. The purified water preparation system is characterized by comprising a source water storage tank, heat exchange equipment, ultrafiltration equipment, a first pipeline, a second pipeline, a switch assembly, a temperature measuring assembly and a main control module;
the output end of the source water storage tank is connected with the input end of the heat exchange device, the output end of the heat exchange device is respectively connected with the input end of the first pipeline and the input end of the second pipeline, the output end of the first pipeline is connected with the input end of the ultrafiltration device, and the output end of the second pipeline is connected with the reflux end of the source water storage tank;
the main control module is respectively connected with the switch assembly and the temperature measuring assembly, the temperature measuring assembly is used for detecting the temperature of liquid output by the heat exchange equipment, and the switch assembly is used for respectively controlling the on-off of the first pipeline and the second pipeline.
2. The purified water preparation system of claim 1, wherein the switch assembly comprises a first valve and a second valve, the first valve is disposed on the first pipeline, the second valve is disposed on the second pipeline, and a control end of the first valve and a control end of the second valve are respectively connected with the main control module.
3. The purified water preparation system of claim 1, further comprising a filter assembly, wherein the output of the heat exchange device is connected to the input of the first conduit and the input of the second conduit, respectively, through the filter assembly.
4. A purified water preparation system as claimed in claim 3, wherein the filter assembly comprises a plurality of filters, the input of each filter together forming the input of the filter assembly being connected to the output of the heat exchange device, and the output of each filter together forming the output of the filter assembly being connected to the input of the first conduit and the input of the second conduit.
5. The purified water preparation system of claim 4, wherein the filter is a self-cleaning filter.
6. The purified water preparation system of claim 1, further comprising a first pump disposed between an output of the source water storage tank and an input of the heat exchange device.
7. The purified water preparation system of claim 1, further comprising a second pump connected to an output of the ultrafiltration device.
8. The purified water preparation system of claim 1, wherein the ultrafiltration device comprises a plurality of ultrafilters and ultrafiltration tanks;
the input ends of the ultrafilters jointly form the input end of the ultrafiltration device, the output ends of the ultrafilters are connected with the input end of the ultrafiltration tank, and the output end of the ultrafiltration tank forms the output end of the ultrafiltration device.
9. A pure water production method based on the purified water production system according to any one of claims 1 to 8, characterized in that the method comprises:
the temperature measuring component detects the temperature of the liquid output by the heat exchange equipment;
when the temperature of the liquid output by the heat exchange equipment is detected to be not in accordance with a preset temperature interval of the system, the first pipeline is controlled to be closed, and the second pipeline is controlled to circulate, so that the liquid output by the heat exchange equipment flows back to the source water storage tank and does not flow to the ultrafiltration equipment; when the temperature of the liquid output by the heat exchange equipment is detected to be in accordance with a preset temperature interval of the system, the first pipeline is controlled to circulate, so that the liquid output by the heat exchange equipment flows to the ultrafiltration equipment.
10. The pure water production method according to claim 9, characterized in that the method further comprises:
when the temperature of the liquid output by the heat exchange equipment is detected to be in accordance with a preset temperature interval of the system, the opening proportion of the first pipeline and the second pipeline is controlled according to the preset proportion of the system.
CN202310499642.XA 2023-05-05 2023-05-05 Purified water preparation system and control method Pending CN116443990A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310499642.XA CN116443990A (en) 2023-05-05 2023-05-05 Purified water preparation system and control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310499642.XA CN116443990A (en) 2023-05-05 2023-05-05 Purified water preparation system and control method

Publications (1)

Publication Number Publication Date
CN116443990A true CN116443990A (en) 2023-07-18

Family

ID=87122009

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310499642.XA Pending CN116443990A (en) 2023-05-05 2023-05-05 Purified water preparation system and control method

Country Status (1)

Country Link
CN (1) CN116443990A (en)

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