CN217808789U - Circulating water treatment system and control device thereof - Google Patents
Circulating water treatment system and control device thereof Download PDFInfo
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- CN217808789U CN217808789U CN202220618131.6U CN202220618131U CN217808789U CN 217808789 U CN217808789 U CN 217808789U CN 202220618131 U CN202220618131 U CN 202220618131U CN 217808789 U CN217808789 U CN 217808789U
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The present disclosure relates to a circulating water treatment system and a control device thereof, the control device including: a housing; the water quality testing unit is provided with a water inlet and a water outlet which are connected with the circulating water treatment system and is used for carrying out online detection on circulating water in the circulating water treatment system; the data analysis control unit is arranged in the shell, is in communication connection with the water quality testing unit, and is used for receiving the detection data of the water quality testing unit, comparing the detection data with preset data and sending a control instruction according to the comparison result; and the communication unit is connected with the data analysis control unit and used for receiving the control instruction and controlling the action of an actuating mechanism of the circulating water treatment system through the control instruction, wherein the actuating mechanism comprises one or more of a dosing device, an acid adding device, a water replenishing pump and a sewage pump. Through the technical scheme, the control device can realize real-time online monitoring of water quality, timely adjust the quality of circulating water, and realize water saving and emission reduction of the system.
Description
Technical Field
The disclosure relates to the technical field of circulating water treatment, in particular to a circulating water treatment system and a control device thereof.
Background
The circulating water treatment system is a system for heat exchange between water and materials adopted by refining enterprises and is one of the most water consumption units of the enterprises, and can achieve better water saving and emission reduction effects only by maintaining high concentration multiple operation. At present, the operation management mode of a circulating water system of domestic refining enterprises is mostly in a rough mode, stable dosing can be realized, the water quality is controlled in a larger range, and even if the enterprises are managed well, the fluctuation range of the concentration multiple is also between 1 and 1.5.
In the related art, one or more water quality indexes of circulating water in a circulating water treatment system are detected and analyzed, and then a worker needs to control a dosing device, an acid adding device, a water replenishing pump and a water discharging pump to perform corresponding operations according to detection results so as to maintain the range of the requirement of the water quality of the circulating water. The water quality control of the circulating water has the following defects: real-time monitoring of circulating water cannot be responded in time, and the circulating water is adjusted, so that hysteresis is caused, and water saving and emission reduction of a circulating water treatment system are not facilitated.
SUMMERY OF THE UTILITY MODEL
An object of this disclosure is to provide a controlling means of circulating water treatment system, this controlling means can realize real-time on-line monitoring quality of water, and in time adjust, realize the water conservation of circulating water system and reduce discharging.
Another object of the present disclosure is to provide a circulating water treatment system, which is applied with the above control device.
In order to achieve the above object, a first aspect of the present disclosure provides a control device for a circulating water treatment system, the control device including:
a housing;
the water quality testing unit is provided with a water inlet and a water outlet which are connected with the circulating water treatment system, and is used for carrying out online detection on circulating water in the circulating water treatment system;
and the data analysis control unit is arranged in the shell and is in communication connection with the water quality testing unit and used for receiving the detection data of the water quality testing unit, comparing the detection data with preset data and sending a control instruction according to a comparison result so as to control an actuating mechanism of the circulating water treatment system, wherein the actuating mechanism comprises one or more of a dosing device, an acid adding device, a water replenishing pump and a sewage discharging pump.
Optionally, the water quality testing unit includes one or more of a pH on-line analyzer, a water hardness on-line analyzer, an alkalinity on-line analyzer, a residual chlorine on-line analyzer, an oxidation-reduction potential on-line analyzer, and a conductivity on-line analyzer disposed in the casing, and when the plurality of sets of on-line analyzers are disposed in parallel and are respectively in communication connection with the data analysis control unit.
Optionally, the water quality testing unit further comprises a gas chromatography-mass spectrometer, the gas chromatography-mass spectrometer is in communication connection with the data analysis control unit, the gas chromatography-mass spectrometer is used for detecting leaked substances in the circulating water, and the data analysis control unit judges a water cooler with leakage according to the leaked substances.
Optionally, the control device further comprises a water inlet pipe and a water outlet pipe;
one end of the water inlet pipe penetrates through the first side surface of the shell and then is communicated with the water inlet; one end of the water outlet pipe penetrates through the second side face of the shell and then is communicated with the water outlet.
Optionally, the first side and the second side are oppositely disposed.
Optionally, the control device of the circulating water treatment system further includes a display screen disposed on the housing, and the display screen is connected to the data analysis control unit.
Optionally, the display screen is a touch display screen, the touch display screen includes a display interface and an input interface, and the display interface is used for displaying the detection data of the water quality testing unit or the working state of the executing mechanism;
the input interface is used for manually inputting the preset data.
Optionally, the bottom of the housing is provided with road wheels.
Optionally, the road wheels are universal wheels.
In a second aspect of the present disclosure, a circulating water treatment system is further provided, where the circulating water treatment system includes a circulating water path, an execution mechanism disposed on the circulating water path, at least one water cooler, and a control device of the circulating water treatment system in the first aspect of the present disclosure, and the control device of the circulating water treatment system is connected in parallel to the circulating water path.
According to the technical scheme, namely the control device of the circulating water treatment system provided by the disclosure, the water quality of circulating water is detected in real time through the water quality testing unit connected in parallel to the circulating water path of the circulating water treatment system to obtain detection data, the detection data is compared with preset data through the data analysis control unit, a control instruction is sent to the execution mechanism according to the comparison result, and the action of the execution mechanism is controlled, for example, one or more of the dosing device, the acid adding device, the water replenishing pump and the sewage discharging pump is controlled to act.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 is a block diagram of a control apparatus of a circulating water treatment system according to some exemplary embodiments of the present disclosure;
FIG. 2 is a schematic structural diagram of a water quality testing unit based on the water quality testing unit in FIG. 1;
fig. 3 is a front view of a housing of a control device of a circulating water treatment system provided in some exemplary embodiments of the present disclosure;
fig. 4 is a rear view of a housing of a control device of a circulating water treatment system provided in some exemplary embodiments of the present disclosure.
Description of the reference numerals
100-a water quality testing unit; 110-pH on-line analyzer; 120-water hardness on-line analyzer; 130-alkalinity on-line analyzer; 140-residual chlorine on-line analyzer; 150-oxidation reduction potential on-line analyzer; 160-conductivity on-line analyzer; 200-a data analysis control unit; 300-a communication unit; 410-a water inlet pipe; 420-water outlet pipe; 500-a housing; 510-a travelling wheel; 600-a display screen; 610-display interface; 620 — input interface.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, the use of directional terms such as "upper" and "lower" in the drawings refers to the upper and lower directions in the drawings, unless otherwise specified; "inner and outer" refer to the inner and outer of the respective component profiles; "distal" and "proximal" refer to the relative structure or relative component being distal or another structure or component. In addition, it should be noted that terms such as "first", "second", and the like are used for distinguishing one element from another, and have no order or importance. In addition, in the description with reference to the drawings, the same reference numerals in different drawings denote the same elements.
As shown in fig. 1 to 4, in a first aspect of the present disclosure, there is provided a control device for a circulating water treatment system, the control device including: a housing 500; when the control device is configured as a control cabinet, the housing 500 may be configured as a rectangular parallelepiped, a square cube, or the like. The water quality testing unit 100 is provided with a water inlet and a water outlet which are connected with the circulating water treatment system, and the water quality testing unit 100 is used for carrying out online detection on circulating water in the circulating water treatment system; and the data analysis control unit 200 is in communication connection with the water quality testing unit 100, and is used for receiving the detection data of the water quality testing unit 100, comparing the detection data with preset data, and sending a control instruction according to a comparison result to control an execution mechanism of the circulating water treatment system, wherein the execution mechanism comprises one or more of a dosing device, an acid adding device, a water replenishing pump and a sewage pump.
According to the technical scheme, the control device of the circulating water treatment system provided by the disclosure detects the water quality of circulating water in real time through the water quality testing unit 100 connected in parallel to the circulating water path of the circulating water treatment system to obtain detection data, compares the detection data with preset data by using the data analysis control unit 200, and sends a control instruction to the execution mechanism according to the comparison result to control the action of the execution mechanism, for example, one or more actions of a dosing device, an acid adding device, a water replenishing pump and a sewage discharging pump are controlled.
The data analysis control unit 200 may be connected to and communicate with each actuator through a connection line or wireless communication, and as shown in fig. 1, in some embodiments, the control device may further include a communication unit 300, where the communication unit 300 is connected to the data analysis control unit 200, and is configured to receive the control command, send the control command to the actuator, and control the actuator to be turned on, turned off, or adjusted in opening degree. It should be noted that the communication unit 300 is configured to facilitate communication between the data analysis control unit 200 and each actuator in a wired or wireless manner. The actuator may have access to a wireless network based on a communication standard, such as WiFi,2G or 3G or 4G or 5G, or a combination thereof.
It can be understood that the circulating water is used for exchanging heat with the water cooler, so that the higher water-saving and emission-reducing effect can be achieved only by maintaining the higher concentration multiple, meanwhile, the water quality of the circulating water is maintained to operate within the range of the higher concentration multiple, and depending on the medicament performance of the scale and corrosion inhibitor, the pH value, calcium hardness, total alkalinity, conductivity, free chlorine, ORP (oxidation-reduction potential) and the like of the circulating water need to be monitored, and all parameters are adjusted through the opening control of the dosing device, the acid adding device, the water supplementing pump and the sewage discharging pump.
It should be noted that the data analysis control unit 200 may be one of a single chip, a microprocessor, and a PLC, or may be another device capable of implementing the above functions in the prior art, and the disclosure is not limited thereto.
In order to realize the online detection of the above parameters of the circulating water, referring to fig. 1 and 2, in some embodiments disclosed herein, the water quality testing unit 100 includes one or more sets of a pH online analyzer 110, a water hardness online analyzer 120, an alkalinity online analyzer 130, a residual chlorine online analyzer 140, an oxidation-reduction potential online analyzer 150, and a conductivity online analyzer 160 disposed in the housing 500, and when the sets are provided, the sets are disposed in parallel and are respectively in communication with the data analysis control unit 200. According to actual needs, the water quality testing unit 100 can select one or more groups of the above analyzers, and when the water quality testing unit 100 comprises a plurality of online analyzers, the online analyzers are all connected to the circulating water path of the circulating water treatment system in a correlated manner, so as to realize independent detection of a certain water quality data by each online analyzer, and are all in communication connection with the data analysis control unit 200, so that the detection data can be transmitted to the data analysis control unit 200. Wherein, the pH on-line analyzer 110 is used for detecting the pH value in the circulating water; the water hardness on-line analyzer 120 is used for detecting the calcium hardness in the circulating water; the alkalinity online analyzer 130 is used for detecting the total alkalinity in the circulating water; the residual chlorine on-line analyzer 140 is used for detecting free chlorine in the circulating water; the oxidation-reduction potential on-line analyzer 150 is used for detecting the oxidation-reduction potential in the circulating water; the conductivity on-line analyzer 160 is used to detect the conductivity of the circulating water.
Compared with the prior art, in the present disclosure, indexes such as the pH value, calcium hardness, total alkalinity, free chlorine, oxidation-reduction potential, and conductivity of the circulating water are monitored on line through the water quality testing unit 100, the detection data is compared with preset data in the data analysis control unit 200, the running state of the water quality is judged, real-time adjustment is performed according to the water quality fluctuation of the circulating water, and the action of the actuating mechanism is controlled by the communication unit 300 according to the comparison result, i.e., dosing or acidification operation and the like are performed. The communication unit 300 can be in communication connection with an actuator by using a 4-20mA signal, wherein the actuator includes, but is not limited to, a dosing device containing a scale and corrosion inhibitor and/or a biocide, an acid adding device, and the like.
In some embodiments, the data analysis control unit 200 may specifically include a comparison module, a control module, and a storage module; the comparison module is respectively connected with the control module and the storage module, wherein the storage module is used for storing preset data; the preset data may include: the water quality range and the medicament concentration range of high concentration multiple which can be determined according to a circulating water treatment scheme can be obtained by implementing tests or experiences. The comparison module is used for receiving the detection data of the water quality testing unit 100 and comparing the detection data with preset data; the control module is used for outputting a control instruction according to the comparison result of the comparison module.
In the circulating water treatment system, due to the reasons of aging of the device, poor overhaul quality of a heat exchanger, poor chemical treatment effect of circulating water, fluctuation in production and the like, leakage of materials of a water cooler becomes a normal state of the circulating water system, and in order to reduce the influence of the leaked materials on the circulating water treatment effect, most enterprises adopt a large-emission large-compensation mode for replacement until the leaked water cooler is cut out. For the material leakage of the water cooler, the current leakage detection basis is a small amount of on-line detection and analysis aiming at certain indexes, a large amount of manual analysis and the past leakage history, hysteresis and uncertainty are provided, and the detection efficiency is greatly limited.
In order to realize accurate and rapid leak detection, in some embodiments of the present disclosure, the water quality testing unit 100 further includes a gas chromatograph-mass spectrometer (not shown in the figure), which is also connected in parallel to a circulating water path of the circulating water treatment system, and may be disposed inside the housing 500 or outside the housing 500, the gas chromatograph-mass spectrometer is in communication connection with the data analysis control unit 200, the gas chromatograph-mass spectrometer is configured to detect leaking substances in the circulating water, and the data analysis control unit 200 determines a water cooler having a leak according to the leaking substances. The storage module of the data analysis control unit 200 stores material data corresponding to materials of different water coolers, and when the gas chromatography-mass spectrometer detects a leaked substance, the detection result is sent to the data analysis control unit 200 and compared with the material data in the comparison module, so that the leaked water cooler is judged.
When the material leakage is judged, the water cooler with the material leakage can be rapidly positioned through the gas chromatography-mass spectrometer and the data analysis control unit 200, so that a worker can maintain the water cooler in time, the circulating water treatment system is ensured to operate under a higher and narrower concentration multiple, and compared with the prior art, the water cooler has higher automation level, accuracy and water saving and emission reduction effects and depends on a leakage detection mode of manual analysis.
In some embodiments, the control device may further include an alarm, which is connected to the data analysis control unit 200 through the communication unit 300, and when it is determined that a leak occurs, the alarm may give an alarm to prompt a worker to perform maintenance in time. It should be noted that the alarm can adopt buzzer or pilot lamp, when adopting the pilot lamp, can set up to a plurality ofly, and every pilot lamp corresponds a water cooler, and when judging that certain water cooler takes place to leak, the pilot lamp that corresponds with it lights in order to indicate the staff.
Referring to fig. 1, 3 and 4, in some embodiments of the present disclosure, the control device further includes an inlet pipe 410 and an outlet pipe 420; one end of the water inlet pipe 410 passes through the first side of the housing 500 and then is communicated with the water inlet; one end of the water outlet pipe 420 passes through the second side surface of the housing 500 and then is communicated with the water outlet. The water quality testing unit 100 comprises a plurality of on-line analyzers, the on-line analyzers are arranged in parallel, namely, the water inlets of the on-line analyzers are communicated with the water inlet pipe 410, and the water outlets of the on-line analyzers are communicated with the water outlet pipe 420, so that each on-line analyzer can independently detect a single water quality index, and the detection result is fed back to the data analysis control unit 200 in real time.
In some embodiments, the first side and the second side are opposite to each other, the water inlet pipe 410 is inserted from the first side of the housing 500, and the water outlet pipe 420 is inserted from the second side opposite to the first side, so that the arrangement of the water inlet pipe 410 and the water outlet pipe is convenient.
Referring to fig. 1 and 3, in some embodiments of the present disclosure, the control device of the circulating water treatment system further includes a display screen 600 disposed in the housing 500, wherein the display screen 600 is connected to the data analysis control unit 200, and is used for displaying a detection result of the water quality testing unit 100 or a comparison result of the data analysis control unit 200 or displaying a water cooler leaking; it will be appreciated that the display of the display screen 600 may also include the operating status of the actuators described above.
For convenience of display and input and modification of preset data by a worker, referring to fig. 3, in some embodiments of the present disclosure, the display screen 600 may be a touch display screen, the touch display screen includes a display interface 610 and an input interface 620, and the display interface 610 is used for displaying detection data of the water quality testing unit 100 or a working state of an actuator; the input interface 620 is used for manually inputting preset data.
To facilitate movement of the control device, in some embodiments, the bottom of the housing 500 is provided with road wheels 510, the road wheels 510 including, but not limited to, universal wheels.
The working principle and the working process of the control device of the circulating water treatment system provided by the embodiment of the disclosure are as follows:
the single water quality index is independently detected by each online analyzer in the water quality testing unit 100, the detection result is fed back to the data analysis and control unit 200 in real time, the detection result is compared with preset data in the comparison module, namely, the deviation condition of the detection data and the preset data is obtained, and then a control instruction is sent to an actuating mechanism by the communication unit 300 so as to control the action of the actuating mechanism, for example, the action of a chemical adding device (containing scale and corrosion inhibitor and/or biocide), an acid adding device, a water supplementing pump and a sewage pump is controlled, so that the purpose of quickly adjusting the water quality of circulating water is realized.
Meanwhile, the leaked material components in the circulating water can be judged through the gas chromatography-mass spectrometer, and the leaked material and material data (namely the preset data information corresponding to the water coolers one by one) are compared in the data analysis control unit 200, so that the leaked water cooler is locked quickly and maintained conveniently.
In some specific embodiments, the data analysis control unit 200 stores in advance a water quality range and a drug concentration range containing applicable high concentration multiple determined according to the water treatment scheme in the storage module, and therefore, the determination principle of the comparison module may be set as:
when the numerical values of the total alkalinity, the calcium hardness and the conductivity detected on line do not exceed the preset total alkalinity, the preset calcium hardness or +/-0.5 of the preset conductivity, the adjustment is not carried out, and when the numerical values exceed +/-0.5, the corresponding actuating mechanism is controlled to act for adjustment; when the concentration of the scale and corrosion inhibitor and the free chlorine or ORP value detected on line do not exceed +/-10% of the preset concentration of the scale and corrosion inhibitor, the preset free chlorine or the preset ORP value, the adjustment is not carried out, and when the concentration of the scale and corrosion inhibitor and the free chlorine or the ORP value exceed +/-10%, the corresponding actuating mechanism is controlled to act and adjust.
For example, the communication unit 300 controls the opening of the valves of the make-up pump and the sewage pump when the pH value, the calcium hardness, or the conductivity is lower or higher than a certain range of the preset pH value, calcium hardness, or conductivity.
If the total alkalinity is lower or higher than a certain range of the set total alkalinity value, the communication unit 300 controls the opening degree of the pump body of the acid adding device.
If the numerical value of the concentration of the scale and corrosion inhibitor, the free chlorine or the ORP value is lower than or higher than the preset concentration of the scale and corrosion inhibitor, the free chlorine or the ORP value within a certain range, the communication unit 300 controls the opening of the pump body of the dosing device for the corrosion and scale inhibitor and the biocide.
If the gas chromatography-mass spectrometer tests the detected leaked materials, the comparison module of the data analysis control unit 200 compares the leaked materials with the material library data to judge the water cooler corresponding to the leaked materials, and the communication unit 300 gives an alarm.
In order to develop a corrosion and scale inhibition scheme suitable for calcium hardness and total alkalinity of 1500mg/L when pursuing a more water-saving effect, additional conditions are set: the calcium hardness plus the total alkalinity was 1500mg/L.
When the pH value, the calcium hardness, the conductivity and the total alkalinity deviate from preset data, the communication unit 300 controls the operation of dosing devices such as valve openings of a water replenishing pump and a sewage pump, scale and corrosion inhibitors, biocides, acids and the like, and ensures that the operation state of the system is adjusted in real time according to water quality.
The second aspect of the disclosure also provides a circulating water treatment system, which comprises a circulating water path, an execution mechanism arranged on the circulating water path, at least one water cooler and a control device of the circulating water treatment system of the first aspect of the disclosure, wherein the control device of the circulating water treatment system is connected in parallel with the circulating water path, so that the circulating water in the circulating water path can be detected on line, and the action of the execution mechanism is controlled according to the detection result, thereby adjusting the quality of the circulating water, so that the circulating water operates under a higher and narrower concentration multiple. Wherein, the actuating mechanism comprises but is not limited to a dosing device, an acid adding device, a water replenishing pump and a sewage pump.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. A control device for a circulating water treatment system, the control device comprising:
a housing (500);
the water quality testing unit (100) is provided with a water inlet and a water outlet which are connected with the circulating water treatment system, and the water quality testing unit (100) is used for carrying out online detection on circulating water in the circulating water treatment system and obtaining detection data;
the water quality testing system comprises a shell (500), a data analysis control unit (200) and a water quality testing unit (100), wherein the data analysis control unit (200) is arranged in the shell (500), is in communication connection with the water quality testing unit (100), and is used for receiving detection data of the water quality testing unit (100), comparing the detection data with preset data, and sending a control instruction according to a comparison result to control an actuating mechanism of the circulating water treatment system, wherein the actuating mechanism comprises one or more of a dosing device, an acid adding device, a water replenishing pump and a sewage discharging pump.
2. The control device of the circulating water treatment system according to claim 1, wherein the water quality testing unit (100) comprises one or more groups of a pH on-line analyzer (110), a water hardness on-line analyzer (120), an alkalinity on-line analyzer (130), a residual chlorine on-line analyzer (140), an oxidation-reduction potential on-line analyzer (150), and a conductivity on-line analyzer (160) disposed in the housing (500), and when the groups are multiple, the multiple groups of on-line analyzers are disposed in parallel and are respectively in communication connection with the data analysis control unit (200).
3. The control device of the circulating water treatment system according to claim 2, wherein the water quality testing unit (100) further comprises a gas chromatograph-mass spectrometer, the gas chromatograph-mass spectrometer is in communication connection with the data analysis control unit (200), the gas chromatograph-mass spectrometer is used for detecting a leaking substance in the circulating water, and the data analysis control unit (200) judges a water cooler with a leak according to the leaking substance.
4. The control device of the circulating water treatment system according to claim 1, further comprising a water inlet pipe (410) and a water outlet pipe (420);
one end of the water inlet pipe (410) penetrates through the first side surface of the shell (500) and then is communicated with the water inlet; one end of the water outlet pipe (420) penetrates through the second side surface of the shell (500) and then is communicated with the water outlet.
5. The control device for a circulating water treatment system according to claim 4, wherein the first side surface and the second side surface are disposed to be opposite to each other.
6. The control device of the circulating water treatment system according to claim 4, further comprising a display screen (600) disposed on the housing (500), wherein the display screen (600) is connected to the data analysis control unit (200).
7. The control device of the circulating water treatment system according to claim 6, wherein the display screen (600) is a touch display screen, the touch display screen comprises a display interface (610) and an input interface (620), and the display interface (610) is used for displaying the detection data of the water quality testing unit (100) or the working state of the actuator;
the input interface (620) is used for manually inputting the preset data.
8. The control device of the circulating water treatment system according to any one of claims 4 to 7, wherein a traveling wheel (510) is provided at the bottom of the housing (500).
9. The control device of circulating water treatment system as claimed in claim 8, wherein the traveling wheels (510) are universal wheels.
10. A circulating water treatment system, comprising a circulating water path, an actuator arranged on the circulating water path, at least one water cooler, and the control device of the circulating water treatment system as claimed in any one of claims 1 to 9, wherein the control device of the circulating water treatment system is connected in parallel with the circulating water path.
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| CN202220618131.6U CN217808789U (en) | 2022-03-17 | 2022-03-17 | Circulating water treatment system and control device thereof |
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