Power plant water sample turbidity detection system and method

Abstract

The present invention discloses a power plant water sample turbidity detection system and method, and relates to the technical field of water body turbidity detection, the power plant water sample turbidity detection system comprises: a sampling module, which comprises a water sample flow pipe and a flow cell connected with the output end of the water sample flow pipe; the detection module comprises a turbidity meter, and the detection end of the turbidity meter is arranged in the flow cell and is in contact with a detection water sample; and a proofreading module. By using the turbidity meter and utilizing a photosensitive sensing technology, the turbidity of a water sample is monitored in real time, the water quality change can be quickly responded, and the real-time performance and the accuracy of water quality data are ensured; the calibration module is arranged to regularly calibrate the turbidity meter so as to improve the reliability of the accurate detection result of the turbidity meter under long-term use of the system, in the calibration process, the opening degree of a pump and a valve is automatically controlled by the controller to prepare a turbidity standard solution, accurate configuration is realized, the calibration accuracy is improved, the currently adopted manual calibration mode is optimized, and the calibration efficiency is improved. The calibration time is shortened; and the calibration precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water turbidity detection, and in particular to a system and method for detecting turbidity of water samples in a power plant. Background Art

[0002] Turbidity is one of the important water quality monitoring indicators in thermal power plants. In order to ensure the normal operation of water treatment equipment, most equipment has certain requirements for the turbidity of inlet water. Therefore, in order to monitor the turbidity of water quality, power plants usually install online turbidity meters in clarifiers, filter outlets and other locations to monitor the turbidity of outlet water in real time, which helps to quickly discover problems in the water treatment process, prevent water quality deterioration and equipment failure, and ensure the stable operation of the power plant water system.

[0003] During daily operation and use, online turbidity meters may have inaccurate measurements due to improper calibration, sensor aging, light source pollution and other problems. Workers are required to inspect the online turbidity meters in a timely manner, find the inaccurate instruments and calibrate them. Currently, manual inspection is usually used. Workers prepare turbidity standard solutions and fill the calibration cylinders. They remove the turbidity sensors and place them in the calibration cylinders for inspection. This process is cumbersome and time-consuming, and there is also a risk of damage to the sensors during removal. In addition, the current manual inspection cycle of online turbidity meters is long, and inaccurate measurements of online turbidity meters cannot be discovered in a timely manner, which is not conducive to the stable operation of the water production system of power plants. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the problems that the current turbidity meter calibration and maintenance process has a long cycle and complicated procedures, the present invention is proposed.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a power plant water sample turbidity detection system, comprising a sampling module, which includes a water sample circulation tube, and a circulation pool connected to the output end of the water sample circulation tube; a detection module, which includes a turbidity meter, and the detection end of the turbidity meter is arranged in the circulation pool and contacts with the detection water sample; and a proofreading module, which includes a turbidity-free water tank, a turbidity mother liquid tank and a descaling agent tank connected to the circulation pool, and a connecting pipeline.

[0007] As a preferred solution of the power plant water sample turbidity detection system of the present invention, the connecting pipeline includes a turbidity-free water circulation pipe connected to the output end of the turbidity-free water tank, a turbidity liquid circulation pipe connected to the output end of the turbidity mother liquid tank, and a mixing pipe connecting the output end of the turbidity-free water circulation pipe and the output end of the turbidity liquid circulation pipe to mix the turbidity-free water and the turbidity mother liquid; wherein the output end of the mixing pipe is connected to the circulation pool.

[0008] As a preferred solution of the power plant water sample turbidity detection system described in the present invention, wherein: the turbidity-free water circulation pipe is sequentially provided with a turbidity-free water electromagnetic metering pump and a turbidity-free water electromagnetic valve along the flow direction of the turbidity-free water; the turbidity liquid circulation pipe is sequentially provided with a turbidity mother liquid electromagnetic metering pump and a turbidity mother liquid electromagnetic valve along the flow direction of the turbidity mother liquid; and a turbidity standard liquid electromagnetic valve is installed on the mixing tube.

[0009] As a preferred solution of the power plant water sample turbidity detection system described in the present invention, the connecting pipeline also includes a descaling agent circulation pipe connecting the descaling agent box and the circulation pool, and a descaling agent electric pump and a descaling agent solenoid valve arranged on the descaling agent circulation pipe in sequence along the descaling agent flow direction.

[0010] As a preferred solution of the power plant water sample turbidity detection system of the present invention, the detection module also includes a secondary meter electrically connected to the turbidity meter, which is used to display the liquid turbidity value detected by the turbidity meter.

[0011] As a preferred solution of the power plant water sample turbidity detection system described in the present invention, wherein: a three-way solenoid valve is installed on the water sample circulation pipe, and the second port of the three-way solenoid valve is connected to a temporary drain pipe; a drain pipe is provided at the output end of the circulation pool, and a drain solenoid valve is installed on the drain pipe.

[0012] As a preferred solution of the power plant water sample turbidity detection system described in the present invention, it also includes a controller, which is used to read the detected turbidity value and control the start and stop of the pump and the opening and closing of the valve; the controller is electrically connected to the turbidity-free water electromagnetic metering pump, the turbidity-free water electromagnetic valve, the turbidity mother liquor electromagnetic metering pump, the turbidity mother liquor electromagnetic valve, the turbidity standard liquid electromagnetic valve, the descaling agent electric pump, the descaling agent electromagnetic valve, the three-way electromagnetic valve, and the water discharge electromagnetic valve.

[0013] In order to solve the above technical problems, the present invention also provides the following technical solutions: a method for detecting turbidity of water samples in a power plant, which is applied to the turbidity detection system of water samples in a power plant, specifically comprising the following steps:

[0014] S1: Close the No. 3 opening of the three-way solenoid valve and open the No. 2 opening to allow the test water sample to be discharged from the temporary drain pipe;

[0015] S2: Turn on the turbidity-free water electromagnetic metering pump, turbidity-free water electromagnetic valve, and turbidity standard solution electromagnetic valve, and use turbidity-free water to flush the circulation pool for 5 minutes;

[0016] S3: Turn on the electromagnetic metering pump and electromagnetic valve of the turbidity mother liquid to mix the turbidity-free water and the turbidity mother liquid into a turbidity standard solution, which flows into the circulation pool and is tested for turbidity by a turbidity meter for at least 5 minutes.

[0017] S4: Read the indication of the secondary meter of the online turbidity meter through the controller, and calculate the relative error of the whole machine of the online turbidity meter according to the indication;

[0018]

[0019] In the formula, δ z is the relative error of the whole machine, S i is the indication of the secondary meter, S b is the set value of the turbidity standard solution;

[0020] S5: If the relative error of the whole machine is less than 5%, the inspection is qualified;

[0021] Then, turn off the turbidity mother solution electromagnetic metering pump and the turbidity mother solution electromagnetic valve, flush the circulation pool with turbidity-free water for 5 minutes, then turn off the turbidity-free water electromagnetic metering pump, turbidity-free water electromagnetic valve and turbidity standard solution electromagnetic valve, close the No. 2 opening of the three-way electromagnetic valve and open the No. 3 opening to resume the online measurement of the turbidity of the water sample;

[0022] S6: If the relative error of the whole machine is ≥5%, the inspection fails;

[0023] Then, the turbidity-free water electromagnetic metering pump, the turbidity mother solution electromagnetic metering pump, the turbidity-free water electromagnetic valve, the turbidity mother solution electromagnetic valve and the turbidity standard solution electromagnetic valve are closed, and the descaling agent electric pump and the descaling agent electromagnetic valve are opened. After the descaling agent fills the circulation pool, the descaling agent electric pump and the descaling agent electromagnetic valve are closed;

[0024] S7: The turbidity meter and the inner wall of the circulation cell are immersed in the descaling agent for at least 1 hour;

[0025] Then repeat steps S2 to S4 until the relative error of the whole machine is less than 5%, and resume online measurement of the turbidity of the water sample; if the relative error of the whole machine is ≥5%, the test fails, and the controller sounds an alarm to remind the staff to calibrate the turbidity meter.

[0026] As a preferred embodiment of the method for detecting turbidity of water samples in power plants according to the present invention, when measuring the turbidity of water samples, openings No. 1 and No. 3 of the three-way solenoid valve and the water drain solenoid valve are all in the open state; opening No. 2 of the three-way solenoid valve, the turbidity-free water solenoid valve, the turbidity mother liquor solenoid valve, the turbidity standard solution solenoid valve, and the descaling agent solenoid valve are all closed.

[0027] As a preferred solution of the method for detecting turbidity of water samples in power plants of the present invention, the turbidity standard solution is prepared in equal proportions of turbidity-free water and turbidity mother solution.

[0028] The beneficial effects of the present invention are as follows: the present invention uses a turbidity meter and photosensitive sensing technology to monitor the turbidity of water samples in real time, can quickly respond to changes in water quality, and ensure the real-time and accuracy of water quality data; by setting a calibration module, the turbidity meter is regularly calibrated to improve the reliability of the accurate detection results of the turbidity meter under long-term use of the system; during the calibration process, the preparation of the turbidity standard solution is achieved by automatically controlling the opening of the pump and the valve through a controller, so as to achieve precise configuration, improve the accuracy of calibration, optimize the currently used manual calibration method, shorten the calibration time, and improve the calibration accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0030] Figure 1 It is a structural schematic diagram of the power plant water sample turbidity detection system of the present invention.

[0031] In the figure: sampling module; 101, water sample circulation pipe; 102, circulation pool; 103, drain pipe; 104, drain solenoid valve; 105, three-way solenoid valve; 106, temporary drain pipe; detection module; 201, turbidity meter; 202, secondary meter; proofreading module; 301, non-turbid water tank; 302, turbidity mother liquid tank; 303, descaling agent tank; 304, non-turbid water circulation pipe; 305, turbid liquid circulation pipe; 306, mixing pipe; 307, descaling agent circulation pipe; 308, non-turbid water electromagnetic metering pump; 309, non-turbid water electromagnetic valve; 310, turbidity mother liquid electromagnetic metering pump; 311, turbidity mother liquid electromagnetic valve; 312, turbidity standard liquid electromagnetic valve; 313, descaling agent electric pump; 314, descaling agent electromagnetic valve; 400, controller. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0035] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0036] Example 1

[0037] Reference Figure 1 , which is the first embodiment of the present invention, provides a power plant water sample turbidity detection system for real-time monitoring of the turbidity of water discharged after being treated by a clarifier or filter; and for automatically calibrating an online turbidity meter 201 to ensure the accuracy and reliability of water quality monitoring.

[0038] Specifically, the system includes a sampling module, a detection module, and a proofreading module; wherein the sampling module includes a water sample circulation tube 101 and a circulation pool 102, the input end of the water sample circulation tube 101 is connected to the water outlet of the clarification tank or filter of the power plant, the output end of the water sample circulation tube 101 is connected to the circulation pool 102, and the water flowing out of the clarification tank or filter is transported to the circulation pool 102 through the water sample circulation tube 101.

[0039] As a further improvement, a drain pipe 103 is provided at the output end of the circulation pool 102, and a drain solenoid valve 104 is installed on the drain pipe 103. The circulation pool 102 is a temporary storage area and turbidity detection area for water samples. During the detection process, the drain solenoid valve 104 is always open to ensure that the water sample is in a flowing state, the water particles in the circulation pool 102 are evenly distributed, and the particles in the water body do not settle, thereby reducing the influence of local turbidity differences on the detection results.

[0040] Furthermore, the detection module is used to detect the turbidity of the water sample, which includes a turbidity meter 201. The detection end of the turbidity meter 201 is arranged in the circulation pool 102 and contacts the detection water sample; the turbidity meter 201 is a turbidity sensor, which measures the turbidity of the water sample by sensing the scattering and absorption of light by suspended particles in the water sample.

[0041] Furthermore, the calibration module is used to calibrate the turbidity meter 201, which includes a turbidity-free water tank 301, a turbidity mother liquid tank 302 and a descaling agent tank 303 connected to the circulation pool 102, and a connecting pipeline; wherein the turbidity-free water tank 301, the turbidity mother liquid tank 302 and the descaling agent tank 303 respectively store turbidity-free water, turbidity mother liquid and descaling agent for calibration and maintenance of the turbidity meter 201; the connecting pipeline includes a turbidity-free water circulation pipe 304, a turbidity liquid circulation pipe 305 and a mixing pipe 306, as well as a descaling agent circulation pipe 307, which are used to transport turbidity-free water, turbidity mother liquid and descaling agent to the circulation pool 102.

[0042] Specifically, the turbidity-free water circulation pipe 304 is connected to the output end of the turbidity-free water tank 301; the turbidity liquid circulation pipe 305 is connected to the output end of the turbidity mother liquid tank 302; one end of the mixing pipe 306 is connected to the output ends of the turbidity-free water circulation pipe 304 and the output ends of the turbidity liquid circulation pipe 305, so that the turbidity-free water and the turbidity mother liquid are mixed to form a turbidity standard solution, and the other end of the mixing pipe 306 is connected to the circulation pool 102, and the turbidity standard solution is injected into the circulation pool 102 through the mixing pipe 306 for calibrating the turbidity meter 201.

[0043] As a further improvement, the turbidity-free water circulation pipe 304 is provided with a turbidity-free water electromagnetic metering pump 308 and a turbidity-free water electromagnetic valve 309 in sequence along the flow direction of the turbidity-free water; the turbidity liquid circulation pipe 305 is provided with a turbidity mother liquid electromagnetic metering pump 310 and a turbidity mother liquid electromagnetic valve 311 in sequence along the flow direction of the turbidity mother liquid; and a turbidity standard liquid electromagnetic valve 312 is installed on the mixing tube 306.

[0044] Specifically, by controlling the opening of the turbidity-free water electromagnetic metering pump 308, the turbidity-free water electromagnetic valve 309, the turbidity mother solution electromagnetic metering pump 310, the turbidity mother solution electromagnetic valve 311, and the turbidity standard solution electromagnetic valve 312, the flow rate and ratio of the turbidity-free water and the turbidity mother solution are controlled to prepare a turbidity standard solution of an accurate ratio for calibration of the turbidity meter 201.

[0045] Furthermore, one end of the descaling agent circulation pipe 307 is connected to the descaling agent box 303 , and the other end is connected to the circulation pool 102 , so as to transport the descaling agent to the circulation pool 102 to remove impurities attached to the wall of the circulation pool 102 and clean the circulation pool 102 .

[0046] As a further improvement, a descaling agent electric pump 313 and a descaling agent electromagnetic valve 314 are sequentially arranged on the descaling agent circulation pipe 307 along the descaling agent flow direction.

[0047] As a further improvement, the detection module further includes a secondary meter 202 electrically connected to the turbidity meter 201 , which is used to display the turbidity value of the liquid detected by the turbidity meter 201 .

[0048] As a further improvement, a controller 400 is further included, which is used to read the detected turbidity value and control the start and stop of the pump and the opening and closing of the valve.

[0049] Specifically, the controller 400 is electrically connected to the turbidity-free water electromagnetic metering pump 308 , the turbidity-free water electromagnetic valve 309 , the turbidity mother liquor electromagnetic metering pump 310 , the turbidity mother liquor electromagnetic valve 311 , the turbidity standard solution electromagnetic valve 312 , the descaling agent electric pump 313 , the descaling agent electromagnetic valve 314 , and the water drain electromagnetic valve 104 .

[0050] Example 2

[0051] Reference Figure 1 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that a three-way solenoid valve 105 is installed on the water sample circulation tube 101, and the second port of the three-way solenoid valve 105 is connected to a temporary drainage pipe 106; wherein, the temporary drainage pipe 106 is used for temporary drainage of water samples, and the three-way solenoid valve 105 is electrically connected to the controller 400.

[0052] The remaining structures are the same as those of Example 1.

[0053] Example 3

[0054] Reference Figure 1 , which is the third embodiment of the present invention, provides a method for detecting turbidity of water samples in a power plant, which is applied to the turbidity detection system for water samples in a power plant described in embodiments 1 and 2.

[0055] The specific steps include:

[0056] S1: close the No. 3 opening of the three-way solenoid valve 105 and open the No. 2 opening to discharge the test water sample from the temporary drainage pipe 106;

[0057] S2: Turn on the turbidity-free water electromagnetic metering pump 308, the turbidity-free water electromagnetic valve 309, and the turbidity standard solution electromagnetic valve 312, and use turbidity-free water to flush the circulation pool 102 for 5 minutes;

[0058] S3: Turn on the turbidity mother liquid electromagnetic metering pump 310 and the turbidity mother liquid electromagnetic valve 311 to mix the turbidity-free water and the turbidity mother liquid into a turbidity standard solution, which flows into the circulation pool 102 and is tested for turbidity by the turbidity meter 201 for at least 5 minutes;

[0059] S4: reading the indication of the secondary meter 202 of the online turbidity meter 201 through the controller 400, and calculating the whole machine relative error of the online turbidity meter 201 according to the indication;

[0060]

[0061] In the formula, is the relative error of the whole machine, is the indication of the secondary meter 202, and is the set value of the turbidity standard solution;

[0062] S5: If the relative error of the whole machine is less than 5%, the inspection is qualified;

[0063] Then, the turbidity mother liquid electromagnetic metering pump 310 and the turbidity mother liquid electromagnetic valve 311 are closed, and the circulation pool 102 is rinsed with turbidity-free water for 5 minutes, and then the turbidity-free water electromagnetic metering pump 308, the turbidity-free water electromagnetic valve 309 and the turbidity standard solution electromagnetic valve 312 are closed, the No. 2 opening of the three-way electromagnetic valve 105 is closed and the No. 3 opening is opened, and the online measurement of the turbidity of the water sample is resumed;

[0064] S6: If the relative error of the whole machine is ≥5%, the inspection fails;

[0065] Then, the turbidity-free water electromagnetic metering pump 308, the turbidity mother liquid electromagnetic metering pump 310, the turbidity-free water electromagnetic valve 309, the turbidity mother liquid electromagnetic valve 311 and the turbidity standard liquid electromagnetic valve 312 are closed, and the descaling agent electric pump 313 and the descaling agent electromagnetic valve 314 are opened. After the descaling agent fills the circulation pool 102, the descaling agent electric pump 313 and the descaling agent electromagnetic valve 314 are closed;

[0066] S7: The turbidity meter 201 and the inner wall of the circulation cell 102 are immersed in the descaling agent for at least 1 hour;

[0067] Then repeat steps S2 to S4 until the relative error of the whole machine is less than 5%, and resume online measurement of the turbidity of the water sample. If the relative error of the whole machine is not less than 5%, the staff needs to further calibrate the turbidity meter 201 or replace the turbidity meter 201, and then resume turbidity measurement of the water sample.

[0068] It is worth noting that when measuring the turbidity of the water sample, the No. 1 opening and the No. 3 opening of the three-way solenoid valve 105, and the water discharge solenoid valve 104 are all in the open state; the No. 2 opening of the three-way solenoid valve 105, the turbidity-free water solenoid valve 309, the turbidity mother liquid solenoid valve 311; the turbidity standard solution solenoid valve 312, and the descaling agent solenoid valve 314 are all closed.

[0069] It is worth noting that the turbidity standard solution is prepared in equal proportions of turbidity-free water and turbidity mother solution.

[0070] In summary, the present invention uses the turbidity meter 201 and the photosensitive sensing technology to monitor the turbidity of the water sample in real time, which can quickly respond to changes in water quality and ensure the real-time and accuracy of water quality data. By setting a calibration module, the turbidity meter 201 is calibrated regularly to improve the reliability of the accurate detection results of the turbidity meter 201 under long-term use of the system. The preparation of the turbidity standard solution for calibration is achieved by controlling the opening of the pump and the valve through the controller 400 to achieve accurate configuration and improve the accuracy of calibration.

[0071] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0072] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0073] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0074] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A power plant water sample turbidity detection system, characterized by: include, A sampling module, comprising a water sample circulation tube (101) and a circulation pool (102) connected to the output end of the water sample circulation tube (101); A detection module, comprising a turbidity meter (201), wherein a detection end of the turbidity meter (201) is arranged in the circulation pool (102) and in contact with a detection water sample; and The calibration module comprises a turbidity-free water tank (301), a turbidity mother liquid tank (302) and a descaling agent tank (303) which are connected to the circulation pool (102), and a connecting pipeline.

2. The power plant water sample turbidity detection system as claimed in claim 1, characterized in that: The connecting pipeline includes a turbidity-free water flow pipe (304) connected to the output end of the turbidity-free water tank (301), a turbidity liquid flow pipe (305) connected to the output end of the turbidity mother liquid tank (302), and a mixing pipe (306) connecting the output end of the turbidity-free water flow pipe (304) and the output end of the turbidity liquid flow pipe (305) to mix the turbidity-free water and the turbidity mother liquid; Wherein, the output end of the mixing tube (306) is connected to the circulation pool (102).

3. The power plant water sample turbidity detection system as claimed in claim 2, characterized in that: The non-turbid water flow pipe (304) is provided with a non-turbid water electromagnetic metering pump (308) and a non-turbid water electromagnetic valve (309) in sequence along the non-turbid water flow direction; The turbid liquid circulation pipe (305) is provided with a turbidity mother liquid electromagnetic metering pump (310) and a turbidity mother liquid electromagnetic valve (311) in sequence along the flow direction of the turbidity mother liquid; The mixing tube (306) is provided with a turbidity standard solution electromagnetic valve (312).

4. The power plant water sample turbidity detection system as claimed in claim 3, characterized in that: The connecting pipeline also includes a descaling agent circulation pipe (307) connecting the descaling agent box (303) and the circulation pool (102), and a descaling agent electric pump (313) and a descaling agent electromagnetic valve (314) arranged on the descaling agent circulation pipe (307) in sequence along the descaling agent flow direction.

5. The power plant water sample turbidity detection system as claimed in claim 1, characterized in that: The detection module also includes a secondary meter (202) electrically connected to the turbidity meter (201) and used to display the turbidity value of the liquid detected by the turbidity meter (201).

6. The power plant water sample turbidity detection system as claimed in claim 1, characterized in that: A three-way solenoid valve (105) is installed on the water sample circulation pipe (101), and the second port of the three-way solenoid valve (105) is connected to a temporary drainage pipe (106); The output end of the circulation pool (102) is provided with a water discharge pipe (103), and a water discharge solenoid valve (104) is installed on the water discharge pipe (103).

7. The power plant water sample turbidity detection system as claimed in claim 6, characterized in that: Also included is a controller (400) for reading the detected turbidity value and controlling the start and stop of the pump and the opening and closing of the valve; The controller (400) is electrically connected to a turbidity-free water electromagnetic metering pump (308), a turbidity-free water electromagnetic valve (309), a turbidity mother liquid electromagnetic metering pump (310), a turbidity mother liquid electromagnetic valve (311), a turbidity standard liquid electromagnetic valve (312), a descaling agent electric pump (313), a descaling agent electromagnetic valve (314), a three-way electromagnetic valve (105), and a water discharge electromagnetic valve (104).

8. A method for detecting turbidity of water samples in a power plant, characterized in that: The method is applied to the power plant water sample turbidity detection system as claimed in any one of claims 1 to 7, and specifically comprises the following steps: S1: closing the No. 3 opening of the three-way solenoid valve (105) and opening the No. 2 opening, so that the test water sample is discharged from the temporary drainage pipe (106); S2: Turn on the turbidity-free water electromagnetic metering pump (308), the turbidity-free water electromagnetic valve (309), and the turbidity standard solution electromagnetic valve (312), and use the turbidity-free water to flush the circulation pool (102) for 5 minutes; S3: Turn on the turbidity mother liquid electromagnetic metering pump (310) and the turbidity mother liquid electromagnetic valve (311), so that the turbidity-free water and the turbidity mother liquid are mixed into a turbidity standard solution, the turbidity standard solution flows into the circulation pool (102), and the turbidity of the turbidity standard solution is tested for at least 5 minutes by the turbidity meter (201); S4: reading the indication of the secondary meter (202) of the online turbidity meter (201) through the controller (400), and calculating the whole machine relative error of the online turbidity meter (201) according to the indication; Where, is the relative error of the whole machine, is the indication of the secondary meter (202), and is the set value of the turbidity standard solution; S5: If the relative error of the whole machine is less than 5%, the inspection is qualified; Then, the turbidity mother liquid electromagnetic metering pump (310) and the turbidity mother liquid electromagnetic valve (311) are closed, and the circulation pool (102) is rinsed with turbidity-free water for 5 minutes. Then, the turbidity-free water electromagnetic metering pump (308), the turbidity-free water electromagnetic valve (309) and the turbidity standard solution electromagnetic valve (312) are closed, and the No. 2 opening of the three-way electromagnetic valve (105) is closed and the No. 3 opening is opened to resume the online measurement of the turbidity of the water sample; S6: If the relative error of the whole machine is ≥5%, the inspection fails; Then, the turbidity-free water electromagnetic metering pump (308), the turbidity mother liquid electromagnetic metering pump (310), the turbidity-free water electromagnetic valve (309), the turbidity mother liquid electromagnetic valve (311) and the turbidity standard liquid electromagnetic valve (312) are closed, and the descaling agent electric pump (313) and the descaling agent electromagnetic valve (314) are opened, and after the descaling agent fills the circulation pool (102), the descaling agent electric pump (313) and the descaling agent electromagnetic valve (314) are closed; S7: The turbidity meter (201) and the inner wall of the circulation cell (102) are immersed in the descaling agent for at least 1 hour; Then, steps S2 to S4 are repeated until the relative error of the whole machine is less than 5%, and the online measurement of the turbidity of the water sample is restored; if the relative error of the whole machine is ≥ 5%, the test fails, and the controller (400) issues an alarm to remind the staff to calibrate the turbidity meter (201).

9. The method for detecting turbidity of water samples in a power plant according to claim 8, characterized in that: When measuring the turbidity of a water sample, the first opening and the third opening of the three-way solenoid valve (105), as well as the water discharge solenoid valve (104) are all in an open state; the second opening of the three-way solenoid valve (105), the turbidity-free water solenoid valve (309), the turbidity mother solution solenoid valve (311), the turbidity standard solution solenoid valve (312), and the descaling agent solenoid valve (314) are all closed.

10. The method for detecting turbidity of water samples in a power plant according to claim 8, characterized in that: The turbidity standard solution is prepared in equal proportions of turbidity-free water and turbidity mother solution.

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