Pipe network simulator and water quality stability simulation test device

Abstract

This invention discloses a pipeline network simulator and a water quality stability simulation test device, belonging to the technical field of water quality stability simulation test. The pipeline network simulator includes a simulated pipe and an inner sleeve. The simulated pipe is taken from an actual water supply network and is used to simulate the real state of the inner wall of a pipeline in service. The simulated pipe has an inlet and an outlet at both ends. The inner sleeve is sealed at both ends and located inside the simulated pipe. The inner sleeve is used to reduce the water flow area of ​​the simulated pipe, thereby reducing the amount of water used in the test. The pipeline network simulator provided by this invention, by using in-service pipelines from an actual water supply network as the simulation body, can completely preserve the multi-layered structure of the inner wall. Compared with artificially cultivating biofilms or aging new pipes, the release patterns of corrosion layers and scale are closer to reality, and the test conclusions have stronger reference value.

Description

Technical Field

[0001] This invention belongs to the field of water quality stability simulation test technology, specifically relating to a pipeline simulator and a water quality stability simulation test device. Background Technology

[0002] Urban water supply transmits water from water treatment plants to end users through water supply networks. Although the water quality is strictly controlled at the water treatment plants, the water quality may be affected by biofilm layers, accumulated corrosion products, and scale layers on the inner walls of the pipes during the transportation process in the water supply network. Therefore, the water quality stability of the water supply network is directly related to the water safety of end users.

[0003] Therefore, it is necessary to conduct simulation tests on the water quality stability of the water supply network. Traditional water quality stability simulation tests require constructing a circulating test pipeline, allowing water to flow within the pipeline, and monitoring changes in the water quality to determine water quality stability. To simulate the actual condition of the inner walls of in-service pipes in the water supply network, a common method is to connect a biofilm culture module in series with the circulating test pipeline. However, biofilm culture is time-consuming, inefficient, and it is difficult to guarantee the realism of the simulation.

[0004] In summary, there is an urgent need to develop a pipeline network simulator and a water quality stability simulation test device to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a pipeline network simulator and a water quality stability simulation test device to solve the technical problem that it is difficult to ensure the authenticity of the internal wall condition of the pipeline in service in a water supply network when using biofilm culture components to simulate the water quality stability simulation test.

[0006] According to one aspect, in order to achieve the above objectives, an embodiment of the present invention provides a pipeline network simulator, including a simulated pipe and an inner sleeve. The simulated pipe is taken from an actual water supply network and is used to simulate the real state of the inner wall of the pipeline during service. The simulated pipe is provided with an inlet and an outlet at both ends, respectively. The inner sleeve is sealed at both ends and is located inside the simulated pipe. The inner sleeve is used to reduce the water flow area of ​​the simulated pipe to reduce the amount of water used in the test.

[0007] In one possible implementation, the simulated tube includes several simulated segments spliced ​​together along the axial direction. The ends of the simulated segments are provided with flanges for connecting with adjacent simulated segments. Both ends of the simulated tube are connected with plugs to ensure the sealing of the simulated tube. The plugs are provided with vent ports.

[0008] In one possible implementation, a support plate is sandwiched between two flanges that are spliced ​​together. The support plate has a support hole at its center. The inner diameter of the support hole is the same as the outer diameter of the inner sleeve. The inner sleeve passes through the support holes of multiple support plates. The support plate has multiple flow holes that are spaced apart circumferentially along the support plate.

[0009] In one possible implementation, the outer diameter of the inner sleeve is 0.4 to 0.7 times the simulated inner diameter, the inner sleeve is made of PE material, and the plug is made of PP material.

[0010] The present invention also provides a water quality stability simulation test device, including a simulation unit, the simulation unit including the aforementioned pipeline simulator, the water quality stability simulation test device further including a main water tank, a main pipeline, a circulation pump and a water quality test unit, both ends of the main pipeline are connected to the main water tank, the circulation pump is located on the main pipeline for circulating test water, the simulation unit and the water quality test unit are sequentially located on the main pipeline, and the water quality test unit is used to detect the water quality of the test water flowing through the simulation unit.

[0011] In one possible implementation, the simulation unit further includes a test pipe, which is a new pipe in an unused state. The pipeline simulator and the test pipe are connected in parallel on the main pipeline. The input end of the pipeline simulator is equipped with valve one, and the input end of the test pipe is equipped with valve two.

[0012] In one possible implementation, a test pipeline and a mixing pipeline are connected in parallel on the main pipeline. The simulation unit and the water quality test unit are sequentially arranged on the test pipeline. A valve three is provided at the input end of the test pipeline, and a valve four is provided on the mixing pipeline. A water quality mixing test unit is provided upstream of the test pipeline and the mixing pipeline on the main pipeline.

[0013] In one possible implementation, the water quality preparation and testing unit includes a conductivity sensor, a chloride ion sensor, a resistance temperature detector (RTD) sensor, a pH sensor, a hardness sensor, an alkalinity sensor, an iron ion sensor, and a turbidity sensor, all of which are installed on the main pipeline.

[0014] In one possible implementation, the main water tank is connected to a makeup water tank, a local water source unit, and a chemical dosing system. The makeup water tank is used to supply desalinated water to the main water tank, the local water source unit is used to supply local water to the main water tank, and the chemical dosing system is used to supply the main water tank with the chemicals required for water quality adjustment.

[0015] In one possible implementation, an aeration head is provided on the bottom wall of the main water tank. The aeration head is connected to an external air supply unit and is used to supply air into the main water tank to regulate the dissolved oxygen content of the test water.

[0016] The significant technical advantages of this invention are as follows: Compared with existing technologies, by using in-service pipes in actual water supply networks as the simulation subject, the multi-layered structure of the inner wall can be completely preserved. Compared with artificially cultivating biofilms or aging new pipes, the release patterns of corrosion layers and scale are closer to reality, and the experimental conclusions have stronger reference value. The built-in inner sleeve reduces the amount of water used in the experiment without changing the reaction interface of the simulated pipe's inner wall, making laboratory simulation of large-diameter pipe networks feasible. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a pipeline simulator in one embodiment of the present invention; Figure 2 for Figure 1 Internal structure diagram of the pipeline network simulator; Figure 3 for Figure 1 Schematic diagram of the inner sleeve; Figure 4 This is a schematic diagram of the structure of a water quality stability simulation test device in one embodiment of the present invention; Figure 5 for Figure 4 A schematic diagram of the structure of the water quality preparation and testing unit.

[0019] In the diagram: 101. Simulation pipe; 102. Inner sleeve; 103. Inlet; 104. Outlet; 105. Simulation section; 106. Flange; 107. Plug; 108. Support plate; 109. Support hole; 110. Flow hole; 111. Vent; 1. Pipeline simulator; 2. Main water tank; 3. Main pipeline; 4. Circulation pump; 5. Simulation unit; 6. Water quality test unit; 7. Test pipe body; 8. Valve one; 9. Valve two; 301. Test pipeline; 302. 10. Distribution pipeline; 11. Valve 3; 12. Valve 4; 13. Water quality distribution and testing unit; 14. Conductivity sensor; 15. Chloride ion sensor; 16. Resistance temperature detector (RTD) sensor; 17. pH sensor; 18. Hardness sensor; 19. Alkalinity sensor; 10. Iron ion sensor; 10. Turbidity sensor; 11. Makeup tank; 12. Local water source unit; 13. Chemical dosing system; 14. Aeration head; 15. Air supply unit. Detailed Implementation

[0020] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0022] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] In the description of the embodiments of this application, the term "and / or" is merely a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship. In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0025] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0026] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation", "connection", "linking", and "fixing" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components.

[0027] This embodiment provides a pipeline network simulator, primarily used for laboratory simulation studies of water quality stability in water supply networks. It is used to reproduce the water quality evolution patterns of real-world operating pipeline networks and to conduct related experiments on corrosion and scaling, pollutant release, and water quality risk control. This solution addresses the problems of insufficient realism in traditional artificially cultivated biofilm simulations and excessively high simulation costs due to excessively large diameter pipes. It directly uses operating pipes from actual water supply networks, preserving the realistic multi-layered corrosion, scaling, and biofilm structure of the inner wall. Simultaneously, through the built-in inner sleeve 102, the experimental water consumption is significantly reduced without altering the inner wall reaction surface.

[0028] Please see Figures 1-5This invention illustrates a pipeline simulator according to one embodiment of the present invention. The simulated pipe 101 is directly taken from an actual operating water supply network and is a large-diameter pipe that has been in long-term service. Its inner wall retains the corrosion product layer, biofilm layer, and scale deposit layer naturally formed during actual operation. Compared with traditional simulation methods that artificially cultivate biofilm or age new pipes, this method can accurately reproduce the real processes of scale erosion, corrosion product release, and microbial activity under hydraulic disturbance, thus improving the reference value and reliability of the experimental results. The simulated pipe 101 is equipped with an inlet 103 and an outlet 104, which can be connected in series to the circulating test pipeline 301. The simulated pipe 101 also has an exhaust port 111. The inlet 103 is located at the lower part of the simulated pipe 101, and the exhaust port 111 is located at the upper part of the simulated pipe 101, allowing water to slowly fill the pipe cavity from bottom to top. Accumulated air can be discharged through the exhaust port 111, preventing water hammer caused by excessive water volume and avoiding air masses interfering with the water flow pattern and pipe wall shear force.

[0029] To address the issue of excessive water consumption and high operating costs due to the large diameter of the service pipe, this design incorporates an inner sleeve 102 coaxially fitted inside the simulation pipe 101. The inner sleeve 102 is a hollow tube sealed at both ends, made of inert non-metallic materials such as PE, which is chemically stable, does not react with water, and will not interfere with water quality test results. The inner sleeve 102 occupies the central volume inside the simulation pipe 101, significantly reducing the effective cross-sectional area of ​​the simulation pipe 101, thereby reducing the water demand for the test and ensuring the feasibility of conducting water quality simulation tests under laboratory conditions.

[0030] In this embodiment, the diameter of the inner sleeve 102 is specifically 0.4 to 0.7 times the inner diameter of the simulated pipe 101. If the proportion is too small, the water passage cross section will be too narrow, which will lead to an abnormally high flow velocity and deviate from the hydraulic conditions of the real pipe network. If the proportion is too large, the water-saving effect of volume reduction will not be obvious and the operating cost cannot be effectively reduced.

[0031] The simulation tube 101 adopts a segmented assembly structure, consisting of several simulation segments 105 sequentially spliced ​​along the axial direction. Each simulation segment 105 has a flange 106 fixed at both ends, and adjacent simulation segments 105 are fastened together with bolts to the flanges 106. Plugs 107 are installed at both ends of the simulation tube 101 to achieve end sealing. The inlet 103, outlet 104, and vent 111 are located on the end plugs 107. The plugs 107 are made of corrosion-resistant PP non-metallic material and do not participate in the water quality reaction. The segmented structure of the simulation tube 101 allows for flexible adjustment of the number of simulation segments 105 and the total length of the simulation tube 101 according to experimental needs, thereby changing the hydraulic residence time of the water and adapting to research requirements with different experimental cycles and reaction durations. Furthermore, it facilitates the cutting of service pipe sections from the field, reducing the difficulty of transporting and installing long-distance pipelines.

[0032] To prevent the inner sleeve 102 from vibrating or shifting under the scouring of water flow, support plates 108 are sandwiched between adjacent flanges 106. The support plates 108 are tightened synchronously with the flanges 106, facilitating installation and, more importantly, avoiding the need for additional positioning structures on the inner wall of the simulated pipe 101, thus preventing damage to the corrosion product layer, biofilm layer, and scale deposit layer on the inner wall of the simulated pipe 101. A support hole 109 is formed in the center of each support plate 108, with its inner diameter matching the outer diameter of the inner sleeve 102. The inner sleeve 102 passes through the support holes 109 in the center of all support plates 108 sequentially, achieving multi-point coaxial support through multiple sets of support plates 108. Multiple flow holes 110 are evenly formed around the circumference of each support plate 108, allowing water to flow smoothly along the axial direction. The support plates 108 ensure the structural stability of the inner sleeve 102, preventing vibration and shifting caused by water flow impact, while also avoiding excessive disturbance to the water flow inside the pipe, ensuring the authenticity of the hydraulic conditions.

[0033] Based on the above-mentioned pipeline simulator, this embodiment also provides a water quality stability simulation test device, including a main water tank 2, a main pipeline 3, a circulating pump 4, a simulation unit 5, a water quality preparation test unit 12, and a water quality test unit 6.

[0034] The main water tank 2 serves as a storage and mixing container for the test water. The makeup water tank 13 and the local water source unit 14 are connected to the main water tank 2 via pipelines. The makeup water tank 13 is used to transport desalinated water, while the local water source unit 14 is used to transport actual municipal water. The two can be mixed in proportion to simulate water supply conditions of different water source types and qualities. The chemical dosing system 15 can quantitatively add various chemicals to the main water tank 2 to adjust water quality parameters such as pH, hardness, alkalinity, residual chlorine, and ionic strength. Aeration heads 16 are arranged on the bottom wall of the main water tank 2. These aeration heads 16 are connected to an external air supply unit 17, which can blow filtered clean air into the water to control the dissolved oxygen content.

[0035] Both ends of the main pipeline 3 are connected to the main water tank 2. The circulation pump 4 is installed on the main pipeline 3 to provide power for the entire circulation system, driving the water to flow continuously and simulating the continuous water supply and distribution state of a real pipe network. Compared with some static immersion tests in traditional technologies, continuous dynamic circulation can realistically reproduce the erosion effect of water flow shear force on the corrosion layer and scale layer of the pipe wall, and the water quality evolution pattern is closer to the actual pipe network operation state.

[0036] Downstream of the circulating pump 4, the main pipeline 3 splits into two parallel branches: a distribution pipeline 302 and a test pipeline 301. The input ends of the distribution pipeline 302 and the test pipeline 301 are respectively equipped with valve 11 (fourth valve) and valve 10 (third valve), which can be independently controlled for on / off switching. Upstream of the two branches, a water quality distribution and testing unit 12 is shared. Along the water flow direction, the water quality distribution and testing unit 12 integrates, in sequence, a conductivity sensor 1201, a chloride ion sensor 1202, a resistance temperature detector (RTD) sensor 1203, a pH sensor 1204, a hardness sensor 1205, an alkalinity sensor 1206, an iron ion sensor 1207, and a turbidity sensor 1208, enabling real-time monitoring of multiple water quality parameters.

[0037] By employing a dual-branch design of the distribution pipeline 302 and the test pipeline 301, during the test preparation phase, valve 310 can be closed and valve 411 opened. At this time, the water flows directly back to the main water tank 2 via the distribution pipeline 302, forming a pre-distribution cycle that bypasses the simulation unit 5. Water quality can then be adjusted through operations such as water source ratio, chemical dosing, and aeration. The water quality distribution test unit 12 monitors various parameters in real time. Once all indicators reach the test set values, the system switches to the test conditions. This design avoids water fluctuations during the distribution process impacting the simulation unit 5, preventing interference with the true state of the inner wall of the simulation pipe 101 under non-test conditions, thus ensuring accurate test conditions.

[0038] The test pipeline 301 is equipped with a simulation unit 5 and a water quality test unit 6. The simulation unit 5 adopts a parallel dual-branch design, comprising two parallel simulation pipes 101: one is the pipeline simulator 1 in service, and the other is a brand-new test pipe 7 in non-service condition. Valves 8 and 9 are respectively installed at the input ends of the two pipes. The water quality test unit 6 is located downstream of the simulation unit 5 and mainly includes an iron ion detection component and a turbidity detection component. It is used to monitor the water quality flowing out of the simulation pipe 101 in real time, thereby assessing the changes in water quality stability.

[0039] The simulation unit 5 of this scheme includes a parallel pipeline simulator 1 and a test pipe 7, which can switch test modes: In the first state, valve 411 is closed, valve 310 is open, valve 18 is opened alone, and only the pipeline simulator 1 in service is run to carry out water quality stability evolution test of long-term service pipelines. In the second state, valve 411 is closed, valve 310 is open, valve 29 is opened alone, and only the test pipe 7 is operated to carry out research on the initial corrosion and water quality change patterns of the newly laid pipeline.

[0040] By connecting the pipeline simulator 1 and the test pipe 7 in parallel, the two simulation pipes 101 can share a single test system. They can use the same local water source, dosing system 15, aeration conditions, and hydraulic conditions, making it easy to adjust the same water quality conditions. After conducting tests using the in-service pipeline simulator 1 and the new test pipe 7, it is convenient to compare the different effects of the two on water quality. This can reduce errors caused by variables such as water quality fluctuations and temperature differences, thereby improving the accuracy and comparability of the control data.

[0041] During the operation of this device, in the water quality preparation stage, valve 3 (10) is closed, valve 4 (11) is opened, and the circulation pump 4 is started to circulate the water between the main water tank 2, the water quality preparation and testing unit 12, and the preparation pipeline 302. According to the test objectives, the water supply tank 13 and the local water source unit 14 are replenished proportionally. Chemicals are added through the dosing system 15 to adjust water quality parameters. The air supply unit 17 is started to regulate dissolved oxygen content through the aeration heads 16. The water quality preparation and testing unit 12 monitors various water quality indicators. Once all parameters have stabilized and reached the test set values, the pre-preparation is complete.

[0042] During the pipeline simulation test, valve 4 (11) is closed, valve 3 (10) is opened, and valve 1 (8) or valve 2 (9) is opened according to the test requirements. Driven by the circulation pump 4, the water flows through the simulation unit 5 and the water quality test unit 6 before returning to the main water tank 2, forming a test cycle. During the test, changes in iron ions, turbidity, and other data in the water quality test unit 6 are recorded to analyze the influence of these factors on water quality stability.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of protection of the claims of the present invention.

Claims

1. A pipeline network simulator, characterized in that, It includes a simulation pipe (101) and an inner sleeve (102). The simulation pipe (101) is taken from the actual water supply network and is used to simulate the real state of the inner wall of the pipe during service. The simulation pipe (101) is provided with an inlet (103) and an outlet (104) at both ends. The inner sleeve (102) is sealed at both ends and is located inside the simulation pipe (101). The inner sleeve (102) is used to reduce the water flow area of ​​the simulation pipe (101) in order to reduce the amount of water used in the test.

2. A pipeline simulator according to claim 1, characterized in that, The simulation tube (101) includes several simulation segments (105) spliced ​​along the axial direction. The ends of the simulation segments (105) are provided with flanges (106) for connecting with adjacent simulation segments (105). Both ends of the simulation tube (101) are connected with plugs (107). The plugs (107) are used to ensure the sealing of the simulation tube (101). The plugs (107) are provided with vents (111).

3. A pipeline simulator according to claim 2, characterized in that, A support plate (108) is sandwiched between the two flanges (106) that are spliced ​​together. The support plate (108) has a support hole (109) in the center. The inner diameter of the support hole (109) is the same as the outer diameter of the inner sleeve (102). The inner sleeve (102) is provided to pass through the support holes (109) of multiple support plates (108). The support plate (108) has multiple flow holes (110) and is arranged at intervals along the circumference of the support plate (108).

4. A pipeline simulator according to claim 2, characterized in that, The outer diameter of the inner sleeve (102) is 0.4 to 0.7 times the inner diameter of the simulated tube (101). The inner sleeve (102) is made of PE material, and the plug (107) is made of PP material.

5. A water quality stability simulation test device, comprising a simulation unit (5), wherein the simulation unit (5) comprises a pipeline simulator (1) as described in any one of claims 1-4, characterized in that, The water quality stability simulation test device also includes a main water tank (2), a main pipeline (3), a circulating pump (4) and a water quality test unit (6). Both ends of the main pipeline (3) are connected to the main water tank (2). The circulating pump (4) is located on the main pipeline (3) and is used to circulate the test water. The simulation unit (5) and the water quality test unit (6) are located on the main pipeline (3) in sequence. The water quality test unit (6) is used to detect the water quality of the test water after it flows through the simulation unit (5).

6. The water quality stability simulation test apparatus according to claim 5, characterized in that, The simulation unit (5) also includes a test pipe body (7), which is a new pipe in an unused state. The pipeline simulator (1) and the test pipe body (7) are connected in parallel on the main pipeline (3). The input end of the pipeline simulator (1) is equipped with valve one (8), and the input end of the test pipe body (7) is equipped with valve two (9).

7. The water quality stability simulation test apparatus according to claim 6, characterized in that, The main pipeline (3) is connected in parallel with a test pipeline (301) and a mixing pipeline (302). The simulation unit (5) and the water quality test unit (6) are sequentially installed on the test pipeline (301). A valve three (10) is installed at the input end of the test pipeline (301). A valve four (11) is installed on the mixing pipeline (302). A water quality mixing test unit (12) is installed upstream of the test pipeline (301) and the mixing pipeline (302) on the main pipeline (3).

8. The water quality stability simulation test apparatus according to claim 7, characterized in that, The water quality preparation and testing unit (12) includes a conductivity sensor (1201), a chloride ion sensor (1202), a thermal resistance sensor (1203), a pH sensor (1204), a hardness sensor (1205), an alkalinity sensor (1206), an iron ion sensor (1207), and a turbidity sensor (1208), all of which are installed on the main pipeline (3).

9. The water quality stability simulation test apparatus according to claim 5, characterized in that, The main water tank (2) is connected to a water replenishment tank (13), a local water source unit (14), and a chemical dosing system (15). The water replenishment tank (13) is used to supply desalinated water to the main water tank (2), the local water source unit (14) is used to supply local water to the main water tank (2), and the chemical dosing system (15) is used to supply the chemicals required for water quality adjustment to the main water tank (2).

10. The water quality stability simulation test apparatus according to claim 9, characterized in that, The bottom wall of the main water tank (2) is provided with an aeration head (16), which is connected to an external air supply unit (17). The aeration head (16) is used to supply air into the main water tank (2) to regulate the dissolved oxygen content of the test water.

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