Water rock corrosion experiment system with five reaction units

Abstract

The invention discloses a water rock corrosion experiment system with five reaction units, and relates to the technical field of corrosion experiments. Comprising a water container, a constant-speed constant-pressure pump, an intermediate container, a preheater, a first reaction kettle, a first liquid taking device, a first digital back-pressure valve, a first back-pressure pump, two convective circulating pumps, a second digital back-pressure valve, a second back-pressure pump, a second liquid taking device, a second reaction kettle, a third reaction kettle, an annular pressure tracking pump, a third liquid taking device, a third digital back-pressure valve and a third back-pressure pump, a real-time chemical signal acquisition device and a separator; the method comprises the following steps: injecting fluid into a reaction kettle filled with a carbonate rock sample at set temperature, pressure and flow velocity, and carrying out water-rock reaction of five circulation loops with the carbonate rock sample; therefore, the water rock corrosion experiment system is complex in structure, and can meet the experiment requirements of simulating a carbonate rock water rock corrosion mechanism in environments with different temperatures, different pressures, different flow speeds and different water chemical characteristics.

Description

Technical Field

[0001] The invention belongs to the technical field of dissolution experiments, and in particular relates to a water-rock dissolution experiment system with five-way reaction units. Background Art

[0002] Since the 1950s, domestic and foreign scholars have successively carried out experiments on the porosity and permeability evolution of carbonate rocks under effective stress. However, most of the previous test samples were low-porosity or fractured limestone, and there was a lack of research on the preservation mechanism of dolomite physical properties in the middle and deep diagenesis stages, especially the lack of a compaction simulation system for comparing dolomites of different rock properties and pore space types.

[0003] Dissolution experiments can be divided into two methods: indoor or outdoor. Indoor is carried out in the laboratory, and outdoor can be carried out in the atmosphere or buried in the soil. Most of the related experimental devices in the prior art only simulate a single external condition, which is not conducive to the analysis of the dissolution rate under different conditions. Therefore, it is necessary to design a multi-circulation loop water-rock dissolution experimental system for conducting experiments in the laboratory to study the dissolution characteristics of rocks under different temperature, flow rate and pressure conditions. Summary of the invention

[0004] The invention provides a water-rock erosion experimental system with five-way reaction units, which solves the problems existing in the prior art.

[0005] To solve the above problems, the technical solution provided by the present invention is as follows: The embodiment of the present invention provides a water-rock erosion experimental system with five-way reaction units, including a water container, a constant speed and constant pressure pump, an intermediate container, a preheater, a first reactor, a first liquid collector, a first digital back-pressure valve, a first back-pressure pump, two convection circulation pumps, a second digital back-pressure valve, a second back-pressure pump, a second liquid collector, a second reactor, a third reactor, an annular pressure tracking pump, a third liquid collector, a third digital back-pressure valve, a third back-pressure pump, a real-time chemical signal acquisition device and a separator; The pipe connected to the feed port of the constant speed and constant pressure pump is inserted into the water container, the pipe connected to the discharge port of the constant speed and constant pressure pump is connected to the intermediate container, the intermediate container is connected to the preheater, the preheater is respectively connected to the first reactor, the second digital back-pressure valve and the third reactor, the first reactor is connected to the first liquid extractor, the first liquid extractor is connected to the first digital back-pressure valve, and the first digital back-pressure valve is connected to the first back-pressure pump; Two convection circulation pumps are connected in parallel in the pipeline between the preheater and the second digital back-pressure valve, the second digital back-pressure valve is respectively connected to the second back-pressure pump and the second liquid extractor, the second liquid extractor is connected to the second reactor; the third reactor is connected to the ring pressure tracking pump, the first digital back-pressure valve, the second reactor and the third reactor are all connected to the third liquid extractor, the third liquid extractor is connected to the third digital back-pressure valve, the third digital back-pressure valve is connected to the third back-pressure pump and a real-time chemical signal acquisition device, and the third back-pressure pump and the real-time chemical signal acquisition device are both connected to the separator.

[0006] In an optional embodiment of the present invention, the intermediate container includes three parallel pressure transmitters, each of which is a piston structure with a volume of 100 ml and a maximum pressure resistance of 100 MPa. The material is Hastelloy HC276 and is used to store the injected fluid medium.

[0007] In an optional embodiment of the present invention, the preheater is a Hastelloy HC276 preheating coil, the heating power of which is 3KW and the pressure resistance of which is 100Mpa, and is used for preheating the injected fluid medium.

[0008] In an optional embodiment of the present invention, the first liquid extractor, the second liquid extractor and the third liquid extractor all use 6 groups of parallel liquid extraction tubes, the working pressure of each liquid extraction tube is 100Mpa, the volume is 10ml, the working temperature is room temperature to 500°C, and the material is Hastelloy HC276, which can be used for continuous liquid extraction.

[0009] In an optional embodiment of the present invention, the water container, the constant speed and constant pressure pump, the intermediate container, the preheater, the first reaction kettle, the first liquid extractor, the first digital back-pressure valve, the first back-pressure pump, the third liquid extractor, the third digital back-pressure valve, the third back-pressure pump, the real-time chemical signal acquisition device and the separator constitute a circulation loop of the first reaction unit.

[0010] In an optional embodiment of the present invention, the two convection circulation pumps, the second digital back-pressure valve, the second back-pressure pump, the second liquid extractor and the second reaction kettle constitute a circulation loop of the second reaction unit.

[0011] In an optional embodiment of the present invention, the water container, the constant speed and constant pressure pump, the intermediate container, the preheater, the third reaction kettle, the ring pressure tracking pump, the third liquid extractor, the third digital back pressure valve, the third back pressure pump, the real-time chemical signal acquisition device and the separator constitute a circulation loop of the third reaction unit.

[0012] In an optional embodiment of the present invention, the first reactor, the first liquid extractor, the first digital back-pressure valve, the first back-pressure pump, the two convection circulation pumps, the second digital back-pressure valve, the second back-pressure pump, the second liquid extractor and the second reactor constitute a circulation loop of the fourth reaction unit.

[0013] In an optional embodiment of the present invention, the water container, the constant speed and constant pressure pump, the intermediate container, the preheater, the first reactor, the first liquid extractor, the first digital back-pressure valve, the first back-pressure pump, the second digital back-pressure valve, the second back-pressure pump, the second liquid extractor, the second reactor, the third liquid extractor, the third digital back-pressure valve, the third back-pressure pump, the real-time chemical signal acquisition device and the separator constitute a circulation loop of the fifth reaction unit.

[0014] Beneficial effects: An embodiment of the present invention provides a water-rock corrosion experimental system with five-way reaction units, including a water container, a constant speed and constant pressure pump, an intermediate container, a preheater, a first reactor, a first liquid collector, a first digital back-pressure valve, a first back-pressure pump, two convection circulation pumps, a second digital back-pressure valve, a second back-pressure pump, a second liquid collector, a second reactor, a third reactor, an annular pressure tracking pump, a third liquid collector, a third digital back-pressure valve, a third back-pressure pump, a real-time chemical signal acquisition device and a separator; under the set temperature, pressure and flow rate, the fluid is injected into the reactor containing the carbonate rock sample, and a 5-way circulation loop water-rock reaction can be performed on the carbonate rock sample; therefore, the water-rock corrosion experimental system of the present invention has a complex structure and can meet the experimental requirements of simulating the carbonate rock water-rock corrosion mechanism under different temperatures, different pressures, different flow rates and different water chemical characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A schematic diagram of a circulation loop of the first reaction unit in a reactor of a water-rock karst experimental system with five reaction units provided in an embodiment of the present application.

[0017] Figure 2 A schematic diagram of a circulation loop of the second reaction unit in a reactor of a water-rock karst experimental system with five reaction units provided in an embodiment of the present application.

[0018] Figure 3A schematic diagram of a circulation loop of the third reaction unit in a reactor of a water-rock karst experimental system with five reaction units provided in an embodiment of the present application.

[0019] Figure 4 A schematic diagram of a circulation loop of the fourth reaction unit in a reactor of a water-rock karst experimental system having five reaction units provided in an embodiment of the present application.

[0020] Figure 5 A schematic diagram of a circulation loop of the fifth reaction unit in a reactor of a water-rock karst experimental system having five reaction units provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0022] Figure 1 to Figure 5 In the figure, V stands for valve, and the subscript number is the number of the valve; P stands for pressure sensor; Tc stands for temperature sensor, and the subscript number is the number of the temperature sensor.

[0023] like Figure 1 to Figure 5 As shown, an embodiment of the present invention provides a water-rock karst experimental system with five-way reaction units, including a water container 1, a constant speed and constant pressure pump 2, an intermediate container 3, a preheater 4, a first reactor 5, a first liquid collector 6, a first digital back-pressure valve 7, a first back-pressure pump 8, two convection circulation pumps 9, a second digital back-pressure valve 10, a second back-pressure pump 11, a second liquid collector 12, a second reactor 13, a third reactor 14, an annular pressure tracking pump 15, a third liquid collector 16, a third digital back-pressure valve 17, a third back-pressure pump 18, a real-time chemical signal acquisition device 19 and a separator 20.

[0024] The pipe connected to the feed port of the constant speed and constant pressure pump 2 is inserted into the water container 1, the pipe connected to the discharge port of the constant speed and constant pressure pump 2 is connected to the intermediate container 3, the intermediate container 3 is connected to the preheater 4, the preheater 4 is respectively connected to the first reactor 5, the second digital back pressure valve 10 and the third reactor 14, the first reactor 5 is connected to the first liquid extractor 6, the first liquid extractor 6 is connected to the first digital back pressure valve 7, and the first digital back pressure valve 7 is connected to the first back pressure pump 8.

[0025] Two convection circulation pumps 9 are connected in parallel in the pipeline between the preheater 4 and the second digital back-pressure valve 10. The second digital back-pressure valve 10 is respectively connected to the second back-pressure pump 11 and the second liquid collector 12, and the second liquid collector 12 is connected to the second reactor 13; the third reactor 14 is connected to the ring pressure tracking pump 15, the first digital back-pressure valve 7, the second reactor 13 and the third reactor 14 are all connected to the third liquid collector 16, the third liquid collector 16 is connected to the third digital back-pressure valve 17, the third digital back-pressure valve 17 is connected to the third back-pressure pump 18 and the real-time chemical signal acquisition device 19, and the third back-pressure pump 18 and the real-time chemical signal acquisition device 19 are both connected to the separator 20.

[0026] The intermediate container 3 includes three parallel pressure transmitters, each of which is a piston structure, with a volume of 100ml, a maximum pressure resistance of 100Mpa, and a material of Hastelloy HC276, which is used to store the injected fluid medium. The volume of the intermediate container 3 in other embodiments can be selected according to the needs of the experiment, and is not specifically limited. The preheater 4 is a Hastelloy HC276 preheating coil, with a heating power of 3KW and a pressure resistance of 100Mpa, which is used to preheat the injected fluid medium. The first liquid extractor 6, the second liquid extractor 12 and the third liquid extractor 16 all use 6 sets of parallel liquid extraction tubes, each of which has a working pressure of 100Mpa, a volume of 10ml, and a working temperature of room temperature to 500℃. It is made of Hastelloy HC276 and can be used for continuous liquid extraction. The preheater 4 is used to preheat the injected fluid, with a temperature control range of room temperature to 500℃, a temperature control accuracy of ±1℃, and a heating power of 3KW. HC276 preheating coil, pressure resistance 100Mpa. Constant speed constant pressure pump 2 has a working pressure of 100Mpa, a flow rate of 0.01-30ml / min, a constant speed and constant pressure working mode, and adopts an AC servo control system, which can be operated by panel or remotely controlled by computer.

[0027] The separator 20 is used for gas-liquid separation of the outlet medium, normal pressure, and a volume of 1000ml. The real-time chemical signal acquisition device 19 is an online calcium and magnesium ion monitor and determination instrument, with a measurement range of: Ca2+, Mg2+ ions: 0.00~20000ppm (the range can be selected according to calibration, and the minimum range is 1.00ppm); ORP: -2000.0~2000.0mV; Temp: -30.0~130.0℃ Resolution: 0.01ppm, 0.1ppm, 1ppm, 0.01ppm, 0.1ppm, 1ppm; Accuracy: ION: ±0.01ppm; ORP: ±0.06%; Temp: ±0.1℃; PH value measurement range: 0~14.00pH, graduation value 0.01pH; Repeatability error: ±0.02pH.

[0028] Automatic data acquisition, computer and software; data acquisition board: Taiwan MOXA, model: C168. The software runs in Windows 7 environment and is programmed using VB. The instrument workflow is displayed on the interface, which enables human-computer dialogue. After the operator sets the parameters, it can be unattended. The computer can automatically collect all pressures, temperatures, and images, and control the operation of the pump, the automatic tracking of the annular pressure pump, the reversal of the pressure reversing valve, etc., and calculate the core permeability. The data collected by the computer can be processed to generate raw data reports, analysis reports, and curves, and at the same time generate database file formats for users to use flexibly. Computer: Lenovo T4900.

[0029] like Figure 1 As shown, a water container 1, a constant speed and constant pressure pump 2, an intermediate container 3, a preheater 4, a first reaction kettle 5, a first liquid extractor 6, a first digital back-pressure valve 7, a first back-pressure pump 8, a third liquid extractor 16, a third digital back-pressure valve 17, a third back-pressure pump 18, a real-time chemical signal acquisition device 19 and a separator 20 constitute a circulation loop of the first reaction unit.

[0030] The working pressure of the first reactor 5 is 100Mpa, the volume is 25ml / 100ml, which can be changed according to the sample quantity and experimental requirements, the working temperature is room temperature ~ 500℃, and the material is Hastelloy HC276. The heating and temperature control system of the first reactor 5 adopts electric heating, PID adjustment and temperature control, the temperature control range is: room temperature ~ 500℃, the temperature control accuracy is ±1℃, and the heating power is: 3KW. The working pressure of the first liquid extractor 6 is 100Mpa, the volume is 10ml, the working temperature is room temperature ~ 500℃, the material is Hastelloy HC276, and the liquid can be taken continuously. 6 groups are connected in parallel. The first digital back pressure valve 7 controls the pressure of the first reactor 5, the control pressure range is: 0 ~ 100MPa, the control accuracy is ±0.1Mpa, the computer is automatically controlled, and the material is Hastelloy HC276. The intermediate container 3 is used for the pressure measurement of the first reaction system, and 3 pressure transmitters with different ranges are selected to automatically switch for measurement. The pressure transmitter has a measuring range of 5MPa, 10Mpa, 120Mpa and an accuracy of 0.25%FS.

[0031] like Figure 2As shown, two convection circulation pumps 9, a second digital back pressure valve 10, a second back pressure pump 11, a second liquid extractor 12 and a second reactor 13 form a circulation loop of the second reaction unit. The convection circulation pump 9 allows the medium to circulate repeatedly in the reactor 2, with a working pressure of 100 MPa, a circulation flow range of 0.01 to 20 ml ml / min, a working temperature of room temperature to 500°C, and a material of Hastelloy HC276. The working pressure of the second reactor 13 is 100 MPa, and the volume is 25 ml / 100 ml, which can be replaced according to the sample quantity and experimental requirements. The working temperature is room temperature to 500°C, and the material is Hastelloy HC276. The heating control system of the second reactor 13 adopts electric heating, PID regulation temperature control, temperature control range: room temperature to 500°C, temperature control accuracy ±1°C, heating power: 3KW. The second digital back pressure valve 10 controls the pressure of the reactor 2, with a control pressure range of 0-100 MPa, a control accuracy of ±0.1 MPa, and is automatically controlled by a computer. The material is Hastelloy HC276. The working pressure of the second liquid extractor 12 is 100 MPa, the volume is 10 ml, the working temperature is room temperature-500°C, and the material is Hastelloy HC276. It can extract liquid continuously, and 6 groups are connected in parallel.

[0032] like Figure 3 As shown, the water container 1, the constant speed and constant pressure pump 2, the intermediate container 3, the preheater 4, the third reaction kettle 14, the ring pressure tracking pump 15, the third liquid extractor 16, the third digital back pressure valve 17, the third back pressure pump 18, the real-time chemical signal acquisition device 19 and the separator 20 constitute the circulation loop of the third reaction unit.

[0033] The displacement pressure of the third reactor 14 is 80Mpa, the ring pressure is 100MPa, the core specification is φ25×100mm, the working temperature is 200℃, the material is Hastelloy HC276, and the real-time permeability change of the core sample is measured. The heating and temperature control system of the third reactor 14 adopts electric heating, PID adjustment and temperature control, the temperature control range is: room temperature ~ 200℃, the temperature control accuracy is ±1℃, and the heating power is 1KW. The working pressure of the ring pressure tracking pump 15 is 100Mpa, and the displacement pressure is automatically tracked with a tracking accuracy of ±0.1MPa, and the computer is automatically controlled. The intermediate container 3 is used for the pressure measurement of the third reaction system. Three pressure transmitters with different ranges are selected and automatically switched for measurement. The pressure transmitter range is 5MPa, 10Mpa, 120Mpa, and the accuracy is 0.25%FS; one set is installed at the inlet and outlet of the core. The working pressure of the third liquid extractor 16 is 100 MPa, the volume is 10 ml, the working temperature is room temperature to 500° C., the material is Hastelloy HC276, and the liquid can be continuously extracted. Six groups are connected in parallel.

[0034] like Figure 4As shown, the first reaction kettle 5, the first liquid extractor 6, the first digital back-pressure valve 7, the first back-pressure pump 8, two convection circulation pumps 9, the second digital back-pressure valve 10, the second back-pressure pump 11, the second liquid extractor 12 and the second reaction kettle 13 constitute a circulation loop of the fourth reaction unit.

[0035] The working pressure of the first reactor 5 and the second reactor 13 is 100Mpa, and the volume is 25ml / 100ml, which can be changed according to the sample quantity and experimental requirements. The working temperature is room temperature to 500℃, and the material is Hastelloy HC276. The heating and temperature control system of the first reactor 5 and the second reactor 13 adopts electric heating, PID adjustment and temperature control, temperature control range: room temperature to 200℃, temperature control accuracy ±1℃, heating power: 1KW. The first digital back pressure valve 7 and the second digital back pressure valve 10 control the pressure of the first reactor 5 and the second reactor 13 respectively, and the control pressure range is: 0∼100MPa, control accuracy ±0.1Mpa, computer automatic control, and the material is HC276. The convection circulation pump 9 allows the medium to circulate between the first reactor 5 and the second reactor 13 once or multiple times. The working pressure is 100MPa, the circulation flow range is 0.01~20mlml / min, the working temperature is room temperature to 500℃, and the material is Hastelloy HC276. The first liquid collector 6 and the second liquid collector 12 are used for sampling the circulation loop of the first reaction unit and the circulation loop of the second reaction unit respectively, with a working pressure of 100 MPa, a volume of 10 ml, a working temperature of room temperature to 500° C., and a material of Hastelloy HC276. Liquid can be continuously collected, and 6 groups are connected in parallel.

[0036] like Figure 5 As shown, the water container 1, the constant speed and constant pressure pump 2, the intermediate container 3, the preheater 4, the first reactor 5, the first liquid extractor 6, the first digital back-pressure valve 7, the first back-pressure pump 8, the second digital back-pressure valve 10, the second back-pressure pump 11, the second liquid extractor 12, the second reactor 13, the third liquid extractor 16, the third digital back-pressure valve 17, the third back-pressure pump 18, the real-time chemical signal acquisition device 19 and the separator 20 constitute a circulation loop of the fifth reaction unit.

[0037] The liquid passes through the first reactor 5 and the second reactor 13 in turn, and enters the separator after a single cycle. The working pressure of the first reactor 5 and the second reactor 13 is 100Mpa, and the volume is 25ml / 100ml, which can be replaced according to the sample volume and experimental requirements. The working temperature is room temperature to 500℃, and the material is Hastelloy HC276. The heating and temperature control system of the first reactor 5 and the second reactor 13 adopts electric heating, PID regulation and temperature control, temperature control range: room temperature to 200℃, temperature control accuracy ±1℃, heating power: 1KW. The first digital back pressure valve 7 and the second digital back pressure valve 10 control the pressure of the first reactor 5 and the second reactor 13 respectively, and the control pressure range is: 0~100MPa, the control accuracy is ±0.1Mpa, and the computer is automatically controlled. The material is Hastelloy HC276. The intermediate container 3 is used for the pressure measurement of the circulation loop of the reaction unit. Three pressure transmitters with different ranges are selected and automatically switched for measurement. The pressure transmitter has a measuring range of 5MPa, 10Mpa, 120Mpa, and an accuracy of 0.25%FS. The first liquid collector 6, the second liquid collector 12, and the third liquid collector 16 are used for sampling the circulation loop of the reaction unit. The working pressure is 100Mpa, the volume is 10ml, the working temperature is room temperature to 500℃, and the material is Hastelloy HC276. Liquid can be collected continuously, and 6 groups are connected in parallel.

[0038] The present invention injects fluid into a reactor containing carbonate rock samples at a set temperature, pressure and flow rate, and performs water-rock reaction with the carbonate rock samples. The carbonate rock samples can be subjected to a 5-way circulating loop water-rock reaction, which can meet the experimental requirements of carbonate rock water-rock dissolution mechanism under different temperature, pressure, flow rate and water chemical characteristic environments. The ion concentration in the generated solution in the sampler is determined, and the connected pore volume, gas porosity, gas permeability and quality of the carbonate rock sample after dissolution are determined, and the changes in gas porosity, gas permeability and quality before and after dissolution are calculated, so as to realize quantitative evaluation of the dissolution amount and dissolution effect of carbonate rock under different diagenetic environments.

[0039] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A water-rock erosion experimental system with five reaction units, characterized in that: It comprises a water container (1), a constant speed constant pressure pump (2), an intermediate container (3), a preheater (4), a first reaction kettle (5), a first liquid extractor (6), a first digital back pressure valve (7), a first back pressure pump (8), two convection circulation pumps (9), a second digital back pressure valve (10), a second back pressure pump (11), a second liquid extractor (12), a second reaction kettle (13), a third reaction kettle (14), an annular pressure tracking pump (15), a third liquid extractor (16), a third digital back pressure valve (17), a third back pressure pump (18), a real-time chemical signal acquisition device (19) and a separator (20); The pipe connected to the feed port of the constant speed and constant pressure pump (2) is inserted into the water container (1); the pipe connected to the discharge port of the constant speed and constant pressure pump (2) is connected to the intermediate container (3); the intermediate container (3) is connected to the preheater (4); the preheater (4) is respectively connected to the first reactor (5), the second digital back-pressure valve (10) and the third reactor (14); the first reactor (5) is connected to the first liquid extractor (6); the first liquid extractor (6) is connected to the first digital back-pressure valve (7); the first digital back-pressure valve (7) is connected to the first back-pressure pump (8); Two convection circulation pumps (9) are connected in parallel in a pipeline between the preheater (4) and the second digital back-pressure valve (10); the second digital back-pressure valve (10) is connected to the second back-pressure pump (11) and the second liquid extractor (12) respectively; the second liquid extractor (12) is connected to the second reactor (13); the third reactor (14) is connected to the ring pressure tracking pump (15); the first digital back-pressure valve (7), the second reactor (13) and the third reactor (14) are all connected to the third liquid extractor (16); the third liquid extractor (16) is connected to the third digital back-pressure valve (17); the third digital back-pressure valve (17) is connected to the third back-pressure pump (18) and a real-time chemical signal acquisition device (19); the third back-pressure pump (18) and the real-time chemical signal acquisition device (19) are both connected to the separator (20).

2. The water-rock erosion experimental system with five-way reaction units according to claim 1 is characterized in that: The intermediate container (3) comprises three parallel-connected pressure transmitters, each of which is a piston-type structure with a volume of 100 ml and a maximum pressure resistance of 100 MPa. The material is Hastelloy HC276 and is used to store the injected fluid medium.

3. The water-rock erosion experimental system with five-way reaction units according to claim 1 is characterized in that: The preheater (4) is a Hastelloy HC276 preheating coil, with a heating power of 3 kW and a pressure resistance of 100 MPa, and is used for preheating the injected fluid medium.

4. The water-rock erosion experimental system with five-way reaction units according to claim 1 is characterized in that: The first liquid extractor (6), the second liquid extractor (12) and the third liquid extractor (16) all use 6 groups of parallel liquid extracting tubes, each of which has a working pressure of 100 MPa, a volume of 10 ml, a working temperature of room temperature to 500° C. The material is Hastelloy HC276, and can be used for continuous liquid extraction.

5. The water-rock erosion experimental system with five-way reaction units according to claim 1 is characterized in that: The water container (1), the constant speed constant pressure pump (2), the intermediate container (3), the preheater (4), the first reaction kettle (5), the first liquid extractor (6), the first digital back pressure valve (7), the first back pressure pump (8), the third liquid extractor (16), the third digital back pressure valve (17), the third back pressure pump (18), the real-time chemical signal acquisition device (19) and the separator (20) form a circulation loop of the first reaction unit.

6. The water-rock erosion experimental system with five-way reaction units according to claim 1 is characterized in that: The two convection circulation pumps (9), the second digital back-pressure valve (10), the second back-pressure pump (11), the second liquid extractor (12) and the second reaction kettle (13) form a circulation loop of the second reaction unit.

7. The water-rock erosion experimental system with five-way reaction units according to claim 1 is characterized in that: The water container (1), the constant speed and constant pressure pump (2), the intermediate container (3), the preheater (4), the third reaction kettle (14), the ring pressure tracking pump (15), the third liquid extractor (16), the third digital back pressure valve (17), the third back pressure pump (18), the real-time chemical signal acquisition device (19) and the separator (20) form a circulation loop of the third reaction unit.

8. The water-rock erosion experimental system with five-way reaction units according to claim 1 is characterized in that: The first reaction kettle (5), the first liquid extractor (6), the first digital back-pressure valve (7), the first back-pressure pump (8), the two convection circulation pumps (9), the second digital back-pressure valve (10), the second back-pressure pump (11), the second liquid extractor (12) and the second reaction kettle (13) form a circulation loop of the fourth reaction unit.

9. The water-rock erosion experimental system with five-way reaction units according to claim 1, characterized in that: The water container (1), the constant speed constant pressure pump (2), the intermediate container (3), the preheater (4), the first reaction kettle (5), the first liquid extractor (6), the first digital back-pressure valve (7), the first back-pressure pump (8), the second digital back-pressure valve (10), the second back-pressure pump (11), the second liquid extractor (12), the second reaction kettle (13), the third liquid extractor (16), the third digital back-pressure valve (17), the third back-pressure pump (18), the real-time chemical signal acquisition device (19) and the separator (20) form a circulation loop of the fifth reaction unit.

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