Reclaimed water outlet temperature control method and system

Abstract

The invention discloses a reclaimed water outlet temperature control method and system, and the method comprises the steps: obtaining the length of a water outlet pipeline of a reclaimed water treatment device, and calculating the water outlet control temperature according to the length of the water outlet pipeline; the outlet water control temperature is the lowest temperature which the reclaimed water treated by the reclaimed water treatment device should reach; monitoring the inlet water temperature, the outlet water temperature and the water flow rate of the reclaimed water treatment device in real time; and according to the difference between the outlet water temperature and the outlet water control temperature and the water flow, the inlet water temperature is adjusted till the difference between the outlet water temperature and the outlet water control temperature is smaller than a preset value. The heating equipment is controlled by controlling the duty ratio, the water inlet temperature can be effectively controlled, meanwhile, dynamic control is conducted in combination with the change of the water outlet temperature, the water temperature can be controlled within a proper range, and then the influence of the high water temperature on the equipment is reduced.

Description

Technical Field

[0001] The present invention relates to intelligent sewage treatment technology, and in particular to a method and system for controlling the temperature of reclaimed water outlet. Background Art

[0002] Construction wastewater treatment involves treating wastewater generated on construction sites to reduce environmental pollution and protect the ecological environment. Construction wastewater primarily originates from the construction process and the lives of construction workers, including concrete curing wastewater, building material cleaning wastewater, construction workers' domestic water, and toilet wastewater. This wastewater contains large amounts of suspended solids, chemicals, oil, bacteria, viruses, and other pollutants, making it challenging to treat. Construction wastewater treatment is crucial for reducing environmental pollution. Direct discharge of untreated construction wastewater can severely pollute the surrounding environment, impacting ecological balance and human health. Effective wastewater treatment can reduce pollutant emissions and protect water resources and the ecological environment. Construction in cold regions can expose greywater treatment plants to freezing water, necessitating heating during the greywater treatment process. Since neutralization reactions during greywater treatment also generate heat, controlling the heating temperature becomes challenging. Excessively high heating temperatures not only waste energy and damage greywater treatment equipment, but also can easily cause scale buildup in pipes, impacting equipment performance. Summary of the Invention

[0003] In order to at least overcome the above-mentioned deficiencies in the prior art, the purpose of the present application is to provide a method and system for controlling the outlet temperature of reclaimed water.

[0004] In a first aspect, an embodiment of the present application provides a method for controlling the outlet temperature of reclaimed water, comprising:

[0005] Obtaining the length of the outlet pipe of the reclaimed water treatment device and calculating the outlet water control temperature based on the outlet pipe length; the outlet water control temperature is the minimum temperature that the reclaimed water after being treated by the reclaimed water treatment device should reach;

[0006] Real-time monitoring of the inlet water temperature, outlet water temperature and water flow rate of the reclaimed water treatment device;

[0007] According to the difference between the outlet water temperature and the outlet water control temperature and the water flow rate, the inlet water temperature is adjusted until the difference between the outlet water temperature and the outlet water control temperature is less than a preset value.

[0008] In a possible implementation, calculating the outlet water control temperature according to the outlet water pipeline length includes:

[0009] Obtaining a heat loss value per unit length of the water outlet pipeline, and calculating a temperature drop value generated in the water outlet pipeline based on the heat loss value and the length of the water outlet pipeline;

[0010] The outlet water control temperature is calculated according to the temperature reduction value and the lowest temperature of the water finally outlet from the outlet water pipeline.

[0011] In a possible implementation, adjusting the inlet water temperature includes:

[0012] A heater is provided at the water inlet of the reclaimed water treatment device;

[0013] The heater periodically heats the incoming water through a control signal;

[0014] The control signal is a periodic signal, and when the control signal is 1, the heater works, and when the control signal is 0, the heater stops working.

[0015] In a possible implementation, adjusting the inlet water temperature according to the difference between the outlet water temperature and the outlet water control temperature, and the water flow rate includes:

[0016] Calculating the difference between the outlet water control temperature and the outlet water temperature as a control difference;

[0017] Multiplying the control difference by a preset control coefficient to form a correction difference; the control coefficient is a constant greater than 0 and less than 1;

[0018] The control duty cycle is calculated based on the corrected difference and the water flow rate, and the inlet water temperature is temperature-controlled by the control duty cycle; the control duty cycle is the ratio of the duration of 1 to the duration of 0 in the control signal within one cycle.

[0019] In a possible implementation, calculating the control duty cycle according to the corrected difference and the water flow rate includes:

[0020] Performing a water heating test on the reclaimed water treatment device and obtaining a corresponding plurality of test sample pairs; the test sample pairs include a correction difference, a water flow rate, and a control duty cycle;

[0021] Performing polynomial fitting on the test sample pair to generate a control equation; the independent variables of the control equation are the correction difference and the water flow rate, and the dependent variable of the control equation is the control duty cycle;

[0022] When calculating the control duty cycle, the corrected difference value and the water flow rate obtained in real time are input into the control equation to calculate the control duty cycle.

[0023] In a second aspect, the present application also provides a reclaimed water outlet temperature control system, comprising:

[0024] an acquisition unit configured to acquire the length of the outlet pipe of the reclaimed water treatment device and calculate the outlet water control temperature based on the outlet pipe length; the outlet water control temperature is the minimum temperature that the reclaimed water after being treated by the reclaimed water treatment device should reach;

[0025] A monitoring unit is configured to monitor the inlet water temperature, outlet water temperature and water flow rate of the reclaimed water treatment device in real time;

[0026] The adjustment unit is configured to adjust the inlet water temperature according to the difference between the outlet water temperature and the outlet water control temperature and the water flow rate until the difference between the outlet water temperature and the outlet water control temperature is less than a preset value.

[0027] In a possible implementation, the acquiring unit is further configured to:

[0028] Obtaining a heat loss value per unit length of the water outlet pipeline, and calculating a temperature drop value generated in the water outlet pipeline based on the heat loss value and the length of the water outlet pipeline;

[0029] The outlet water control temperature is calculated according to the temperature reduction value and the lowest temperature of the water finally outlet from the outlet water pipeline.

[0030] In a possible implementation, the adjusting unit is further configured to:

[0031] A heater is provided at the water inlet of the reclaimed water treatment device;

[0032] The heater periodically heats the incoming water through a control signal;

[0033] The control signal is a periodic signal, and when the control signal is 1, the heater works, and when the control signal is 0, the heater stops working.

[0034] In a possible implementation, the adjusting unit is further configured to:

[0035] Calculating the difference between the outlet water control temperature and the outlet water temperature as a control difference;

[0036] Multiplying the control difference by a preset control coefficient to form a correction difference; the control coefficient is a constant greater than 0 and less than 1;

[0037] The control duty cycle is calculated based on the corrected difference and the water flow rate, and the inlet water temperature is temperature-controlled by the control duty cycle; the control duty cycle is the ratio of the duration of 1 to the duration of 0 in the control signal within one cycle.

[0038] In a possible implementation, the adjusting unit is further configured to:

[0039] Performing a water heating test on the reclaimed water treatment device and obtaining a corresponding plurality of test sample pairs; the test sample pairs include a correction difference, a water flow rate, and a control duty cycle;

[0040] Performing polynomial fitting on the test sample pair to generate a control equation; the independent variables of the control equation are the correction difference and the water flow rate, and the dependent variable of the control equation is the control duty cycle;

[0041] When calculating the control duty cycle, the corrected difference value and the water flow rate obtained in real time are input into the control equation to calculate the control duty cycle.

[0042] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0043] The present invention provides a method and system for controlling the outlet temperature of reclaimed water. By controlling the duty cycle of the heating equipment, the inlet water temperature can be effectively controlled. At the same time, dynamic control is performed in combination with the change of the outlet water temperature, and the water temperature can be controlled within an appropriate range, thereby reducing the impact of high water temperature on the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0045] Figure 1 Schematic diagram of the method steps of an embodiment of the present invention. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of illustration and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate the operations implemented according to some embodiments of the embodiments of the present application. It should be understood that the operations of the flowcharts can be implemented out of sequence, and steps without logical context can be reversed or implemented simultaneously. In addition, those skilled in the art, under the guidance of the contents of this application, can add one or more other operations to the flowchart, or remove one or more operations from the flowchart.

[0047] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0048] Please refer to Figure 1 , which is a flow chart of a method for controlling the outlet temperature of reclaimed water provided by an embodiment of the present invention. Furthermore, the method for controlling the outlet temperature of reclaimed water may specifically include the contents described in the following steps S1 to S3.

[0049] S1: Obtain the length of the outlet pipe of the reclaimed water treatment device, and calculate the outlet water control temperature based on the outlet pipe length; the outlet water control temperature is the minimum temperature that the reclaimed water after being treated by the reclaimed water treatment device should reach;

[0050] S2: Real-time monitoring of the inlet water temperature, outlet water temperature and water flow rate of the reclaimed water treatment device;

[0051] S3: adjusting the inlet water temperature according to the difference between the outlet water temperature and the outlet water control temperature and the water flow rate until the difference between the outlet water temperature and the outlet water control temperature is less than a preset value.

[0052] When the embodiment of the present application is implemented, it takes a period of time for the reclaimed water to flow in the outlet pipe from the time it is treated to the time it is completely discharged from the reclaimed water treatment device. In high-altitude cold areas, the temperature drop over this distance may cause ice to form and affect drainage, and heating the reclaimed water may easily cause a large amount of calcium carbonate and magnesium carbonate to precipitate and form scale attached to the pipe, so a simpler and more practical way is needed to control the temperature of the reclaimed water. In the embodiment of the present application, it is necessary to first calculate the length of the outlet pipe and calculate the temperature drop that may occur in this length of the outlet pipe, and then calculate the outlet water control temperature; if the temperature of the water finally discharged from the pipe needs to be controlled at 10°C, and the calculated temperature drop of the outlet pipe is 2°C, then the outlet water control temperature needs to be controlled at about 12°C; it should be understood that the temperature drop of the outlet pipe is not only related to the length of the pipe, but also to the thermal insulation performance of the pipe, the temperature difference between the inside and outside of the pipe, and the pipe flow rate. Those skilled in the art can make more detailed calculations based on the existing technology, and the embodiment of the present application does not make any restrictions. In the embodiment of the present application, by comparing the difference between the outlet water temperature and the outlet water control temperature, the outlet water temperature can be controlled through heating control. It should be understood that as the ambient temperature, water flow rate, etc. change, the outlet water control temperature may also change accordingly.

[0053] In a possible implementation, calculating the outlet water control temperature according to the outlet water pipeline length includes:

[0054] Obtaining a heat loss value per unit length of the water outlet pipeline, and calculating a temperature drop value generated in the water outlet pipeline based on the heat loss value and the length of the water outlet pipeline;

[0055] The outlet water control temperature is calculated according to the temperature reduction value and the lowest temperature of the water finally outlet from the outlet water pipeline.

[0056] When implementing the embodiment of the present application, the heat loss value can be calculated based on the ambient temperature, insulation conditions, etc. For example, it can be calculated using the following formula:

[0057] Q=(T1-T2)*K*A

[0058] Where T1 is the temperature of the fluid in the pipe, T2 is the ambient temperature, K is the heat transfer coefficient of the pipe, and A is the surface area of the pipe;

[0059] When the heat loss value is calculated and obtained, the temperature drop value of the fluid in the pipeline per unit length can be calculated based on the specific heat capacity of the fluid in the pipeline.

[0060] In a possible implementation, adjusting the inlet water temperature includes:

[0061] A heater is provided at the water inlet of the reclaimed water treatment device;

[0062] The heater periodically heats the incoming water through a control signal;

[0063] The control signal is a periodic signal, and when the control signal is 1, the heater works, and when the control signal is 0, the heater stops working.

[0064] When the embodiment of the present application is implemented, the incoming water is heated by a heater, and this is achieved in a periodic heating manner, which facilitates heating control; at the same time, such control can also ensure that the water temperature near the heater is not too high, reducing the generation of scale.

[0065] In a possible implementation, adjusting the inlet water temperature according to the difference between the outlet water temperature and the outlet water control temperature, and the water flow rate includes:

[0066] Calculating the difference between the outlet water control temperature and the outlet water temperature as a control difference;

[0067] Multiplying the control difference by a preset control coefficient to form a correction difference; the control coefficient is a constant greater than 0 and less than 1;

[0068] The control duty cycle is calculated based on the corrected difference and the water flow rate, and the inlet water temperature is temperature-controlled by the control duty cycle; the control duty cycle is the ratio of the duration of 1 to the duration of 0 in the control signal within one cycle.

[0069] In a possible implementation, calculating the control duty cycle according to the corrected difference and the water flow rate includes:

[0070] Performing a water heating test on the reclaimed water treatment device and obtaining a corresponding plurality of test sample pairs; the test sample pairs include a correction difference, a water flow rate, and a control duty cycle;

[0071] Performing polynomial fitting on the test sample pair to generate a control equation; the independent variables of the control equation are the correction difference and the water flow rate, and the dependent variable of the control equation is the control duty cycle;

[0072] When calculating the control duty cycle, the corrected difference value and the water flow rate obtained in real time are input into the control equation to calculate the control duty cycle.

[0073] When implementing the embodiment of the present application, by controlling the duty cycle of the periodic heating signal, the heating duration can be controlled in disguise, thereby achieving temperature control. Specifically, it is necessary to first construct a fitting control equation by conducting an inlet water heating test on the reclaimed water treatment device. Since there are two independent variables, the constructed fitting equation is actually a three-dimensional equation:

[0074] D=A1x 2 +A2x+A3y 2 +A4y+A5yx+A6

[0075] Where D is the control duty cycle, x is the correction difference, and y is the water flow rate. By fitting the sample, we can find the fitting coefficients A1, A2, A3, A4, A5, and A6. When performing temperature control, we only need to obtain the corresponding correction difference and water flow rate to calculate the control duty cycle and achieve control. This simple and easy-to-implement control process also ensures the accuracy of the final control result due to dynamic control.

[0076] Based on the same inventive concept, the present application also provides a reclaimed water outlet temperature control system, comprising:

[0077] an acquisition unit configured to acquire the length of the outlet pipe of the reclaimed water treatment device and calculate the outlet water control temperature based on the outlet pipe length; the outlet water control temperature is the minimum temperature that the reclaimed water after being treated by the reclaimed water treatment device should reach;

[0078] A monitoring unit is configured to monitor the inlet water temperature, outlet water temperature and water flow rate of the reclaimed water treatment device in real time;

[0079] The adjustment unit is configured to adjust the inlet water temperature according to the difference between the outlet water temperature and the outlet water control temperature and the water flow rate until the difference between the outlet water temperature and the outlet water control temperature is less than a preset value.

[0080] In a possible implementation, the acquiring unit is further configured to:

[0081] Obtaining a heat loss value per unit length of the water outlet pipeline, and calculating a temperature drop value generated in the water outlet pipeline based on the heat loss value and the length of the water outlet pipeline;

[0082] The outlet water control temperature is calculated according to the temperature reduction value and the lowest temperature of the water finally outlet from the outlet water pipeline.

[0083] In a possible implementation, the adjusting unit is further configured to:

[0084] A heater is provided at the water inlet of the reclaimed water treatment device;

[0085] The heater periodically heats the incoming water through a control signal;

[0086] The control signal is a periodic signal, and when the control signal is 1, the heater works, and when the control signal is 0, the heater stops working.

[0087] In a possible implementation, the adjusting unit is further configured to:

[0088] Calculating the difference between the outlet water control temperature and the outlet water temperature as a control difference;

[0089] Multiplying the control difference by a preset control coefficient to form a correction difference; the control coefficient is a constant greater than 0 and less than 1;

[0090] The control duty cycle is calculated based on the corrected difference and the water flow rate, and the inlet water temperature is temperature-controlled by the control duty cycle; the control duty cycle is the ratio of the duration of 1 to the duration of 0 in the control signal within one cycle.

[0091] In a possible implementation, the adjusting unit is further configured to:

[0092] Performing a water heating test on the reclaimed water treatment device and obtaining a corresponding plurality of test sample pairs; the test sample pairs include a correction difference, a water flow rate, and a control duty cycle;

[0093] Performing polynomial fitting on the test sample pair to generate a control equation; the independent variables of the control equation are the correction difference and the water flow rate, and the dependent variable of the control equation is the control duty cycle;

[0094] When calculating the control duty cycle, the corrected difference value and the water flow rate obtained in real time are input into the control equation to calculate the control duty cycle.

[0095] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the composition and steps of each example according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0096] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or can be electrical, mechanical or other forms of connection.

[0097] The units described as separate components may or may not be physically separated. As units, it is obvious that a person of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0098] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0099] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or grid device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program code, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0100] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for controlling the outlet temperature of reclaimed water, characterized in that: include: Obtaining the length of the outlet pipe of the reclaimed water treatment device and calculating the outlet water control temperature based on the outlet pipe length; the outlet water control temperature is the minimum temperature that the reclaimed water after being treated by the reclaimed water treatment device should reach; Real-time monitoring of the inlet water temperature, outlet water temperature and water flow rate of the reclaimed water treatment device; According to the difference between the outlet water temperature and the outlet water control temperature and the water flow rate, the inlet water temperature is adjusted until the difference between the outlet water temperature and the outlet water control temperature is less than a preset value.

2. A method for controlling outlet water temperature of reclaimed water according to claim 1, characterized in that: Calculating the outlet water control temperature according to the outlet water pipeline length includes: Obtaining a heat loss value per unit length of the water outlet pipeline, and calculating a temperature drop value generated in the water outlet pipeline based on the heat loss value and the length of the water outlet pipeline; The outlet water control temperature is calculated according to the temperature reduction value and the lowest temperature of the water finally outlet from the outlet water pipeline.

3. The method for controlling outlet water temperature of claim 1, wherein: Adjusting the inlet water temperature includes: A heater is provided at the water inlet of the reclaimed water treatment device; The heater periodically heats the incoming water through a control signal; The control signal is a periodic signal, and when the control signal is 1, the heater works, and when the control signal is 0, the heater stops working.

4. A method for controlling outlet temperature of reclaimed water according to claim 3, characterized in that: Adjusting the inlet water temperature according to the difference between the outlet water temperature and the outlet water control temperature, and the water flow rate includes: Calculating the difference between the outlet water control temperature and the outlet water temperature as a control difference; Multiplying the control difference by a preset control coefficient to form a correction difference; the control coefficient is a constant greater than 0 and less than 1; The control duty cycle is calculated based on the corrected difference and the water flow rate, and the inlet water temperature is temperature-controlled by the control duty cycle; the control duty cycle is the ratio of the duration of 1 to the duration of 0 in the control signal within one cycle.

5. A method for controlling outlet temperature of reclaimed water according to claim 4, characterized in that: Calculating the control duty cycle according to the correction difference and the water flow rate includes: Performing a water heating test on the reclaimed water treatment device and obtaining a corresponding plurality of test sample pairs; the test sample pairs include a correction difference, a water flow rate, and a control duty cycle; Performing polynomial fitting on the test sample pair to generate a control equation; the independent variables of the control equation are the correction difference and the water flow rate, and the dependent variable of the control equation is the control duty cycle; When calculating the control duty cycle, the corrected difference value and the water flow rate obtained in real time are input into the control equation to calculate the control duty cycle.

6. A reclaimed water outlet temperature control system, characterized in that: include: an acquisition unit configured to acquire the length of the outlet pipe of the reclaimed water treatment device and calculate the outlet water control temperature based on the outlet pipe length; the outlet water control temperature is the minimum temperature that the reclaimed water after being treated by the reclaimed water treatment device should reach; A monitoring unit is configured to monitor the inlet water temperature, outlet water temperature and water flow rate of the reclaimed water treatment device in real time; The adjustment unit is configured to adjust the inlet water temperature until the difference between the outlet water temperature and the outlet water control temperature is less than a preset value according to the difference between the outlet water temperature and the outlet water control temperature and the water flow rate.

7. A reclaimed water outlet temperature control system according to claim 6, characterized in that: The acquisition unit is further configured to: Obtaining a heat loss value per unit length of the water outlet pipeline, and calculating a temperature drop value generated in the water outlet pipeline based on the heat loss value and the length of the water outlet pipeline; The outlet water control temperature is calculated according to the temperature reduction value and the lowest temperature of the water finally outlet from the outlet water pipeline.

8. The reclaimed water outlet temperature control system according to claim 6, characterized in that: The adjustment unit is further configured to: A heater is provided at the water inlet of the reclaimed water treatment device; The heater periodically heats the incoming water through a control signal; The control signal is a periodic signal, and when the control signal is 1, the heater works, and when the control signal is 0, the heater stops working.

9. The reclaimed water outlet temperature control system according to claim 8, characterized in that: The adjustment unit is further configured to: Calculating the difference between the outlet water control temperature and the outlet water temperature as a control difference; Multiplying the control difference by a preset control coefficient to form a correction difference; The control coefficient is a constant greater than 0 and less than 1; The control duty cycle is calculated based on the corrected difference and the water flow rate, and the inlet water temperature is temperature-controlled by the control duty cycle; the control duty cycle is the ratio of the duration of 1 to the duration of 0 in the control signal within one cycle.

10. A reclaimed water outlet temperature control system according to claim 9, characterized in that: The adjustment unit is further configured to: Performing a water heating test on the reclaimed water treatment device and obtaining a corresponding plurality of test sample pairs; the test sample pairs include a correction difference, a water flow rate, and a control duty cycle; Performing polynomial fitting on the test sample pairs to generate a control equation; The independent variables of the control equation are the correction difference and the water flow rate, and the dependent variable of the control equation is the control duty cycle; When calculating the control duty cycle, the corrected difference value and the water flow rate obtained in real time are input into the control equation to calculate the control duty cycle.

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