A water-induced gas release constant pressure test device and control method

Abstract

This invention discloses a water-induced gas release constant pressure test device and control method. The water-induced gas release constant pressure test device mainly consists of a reaction vessel, a brine preparation vessel, a wastewater vessel, a control unit, and a testing unit. This device and control method can achieve relatively precise control of the reaction rate and pressure during the water-induced reaction of material parts and larger structural parts, as well as monitoring of the heat generated during the reaction, gas flow rate, gas concentration, reaction intensity, and other states. It can simulate the process, state, and characteristics of the reaction between material parts and larger structural parts and seawater (lake water) at a certain depth of water (constant pressure) in the laboratory.

Description

Technical Field

[0001] This invention relates to the field of water-induced gas release testing technology for materials or structural components, and particularly to a constant pressure testing device and control method for water-induced gas release testing. Background Technology

[0002] Current water-reactive gas release testers are mainly used for analyzing the water-reactive gas release characteristics of smaller material components. The instrument capacity and the amount of gas release that can be measured are very small, limiting their ability to analyze only the water-reactive gas release characteristics of smaller material components. Furthermore, they lack constant pressure control capabilities. Therefore, they cannot accurately reflect the process, state, and characteristics of the reaction between the entire test piece (larger structural components) and water at a certain depth (constant pressure).

[0003] Therefore, it is necessary to develop a water-induced gas release constant pressure test device and control method to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to design a water-induced gas release constant pressure test device and control method to solve the above problems.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] A water-induced gas release constant pressure test apparatus, comprising:

[0007] The reaction vessel includes a cover and a cylindrical body. The cylindrical body is a barrel-shaped structure with one open end, and the cover is placed on the open end of the cylindrical body. A safety valve, a pressure sensor, and a through-hole are installed on the cover. A pipeline is connected to the cover, and a gas flow meter, a proportional valve, and a flashback valve are installed sequentially on the pipeline. The gas flow meter is located close to the cover. A hydraulic actuator is installed at the bottom of the cylindrical body. The working end of the hydraulic actuator passes through the bottom of the cylindrical body and is located inside the cylindrical body. The working end of the hydraulic actuator is connected to a lifting platform, which is located inside the cylindrical body. A level gauge, a temperature sensor, a hydrogen sensor, an oxygen sensor, a camera, and a lighting fixture are installed inside the cylindrical body. An air inlet is provided at the bottom of the cylindrical body, which is connected to a nitrogen purging device. The nitrogen purging device is connected to a nitrogen pressurization device. A water injection / drainage port I is provided at the bottom of the cylindrical body. Water injection / drainage port I is connected to the outlet of drainage pump I and the inlet of drainage pump II, respectively. The outlet of drainage pump II is connected to a wastewater container.

[0008] A brine preparation container; the brine preparation container is formed into a barrel-shaped structure, with a feed inlet at the top and a stirring device at the bottom. The active end of the stirring device passes through the bottom of the brine preparation container and is placed inside the brine preparation container. The active end of the stirring device is connected to a stirring blade, which is placed inside the brine preparation container. The brine preparation container is also equipped with a level gauge II and a brine concentration sensor. The bottom of the brine preparation container is equipped with a water injection / drainage port II, which is connected to the outlet of the water injection pump and the inlet of the drainage pump I, respectively. The inlet of the water injection pump is connected to a water source.

[0009] Wastewater containers;

[0010] A testing unit for real-time monitoring of heat generation, hydrogen production, and reaction intensity during a water-reaction reaction. The testing unit includes sensor components, a data processing and acquisition instrument, and an industrial control computer. The sensor components include a pressure sensor, a gas flow meter, a level gauge I, a level gauge II, a temperature sensor, a hydrogen sensor, an oxygen sensor, and a camera. The signal output terminals of the pressure sensor, the gas flow meter, the level gauge I, the level gauge II, the temperature sensor, the hydrogen sensor, the oxygen sensor, and the camera are all connected to the signal input terminal of the data processing and acquisition instrument. The signal output terminal of the data processing and acquisition instrument is connected to the signal input terminal of the industrial control computer and the signal input terminal of the safety protection module.

[0011] Furthermore, the water-induced gas release constant pressure test apparatus also includes a control unit for controlling the reaction rate of the test specimen within the reaction vessel while ensuring constant pressure. The control unit includes an interaction module, a data communication module, a calculation control module, and a safety protection module. The output of the interaction module is connected to the input of the calculation control module, the output of the calculation control module is connected to the input of the communication module, and the output of the communication module is connected to the input of the proportional valve, the nitrogen purging device, the nitrogen booster device, the water injection pump, the drain pump I, the drain pump II, and the safety protection module, respectively. The output of the safety protection module is connected to the input of the interaction module and the calculation control module, respectively. The outputs of the proportional valve, the nitrogen purging device, the nitrogen booster device, the water injection pump, the drain pump I, and the drain pump II are connected to the input of the test unit, respectively. The output of the test unit is connected to the input of the data communication module.

[0012] A control method for a water-induced gas release constant pressure test device includes the following steps:

[0013] S1. Prepare brine; Add salt into the brine preparation container through the inlet. The control unit controls the water injection pump to inject water into the brine preparation container based on the feedback value of the level gauge II. After the water injection is completed, the control unit controls the stirring device to automatically stir based on the feedback value of the brine concentration sensor until the brine preparation is complete.

[0014] S2. Open the hatch of the reaction vessel, install the test piece on the lifting platform, install the sensor assembly inside the cylinder, and pass the test cable through the hatch hole to connect it to the data processing and acquisition instrument; after installation, close the hatch and seal the reaction vessel.

[0015] S3. Control the nitrogen replacement equipment through the control unit to replace the air in the reaction vessel with nitrogen, and determine the nitrogen replacement rate based on the oxygen concentration measured by the oxygen sensor; after the nitrogen replacement is completed, control the drain pump II to inject the brine in the brine preparation container into the reaction vessel, and the level gauge II monitors the amount of brine injected into the reaction vessel; after the brine is injected, the control unit controls the nitrogen pressurization equipment to control the pressure in the reaction vessel according to the test requirements.

[0016] S4. The descent speed of the lifting platform inside the reaction vessel is controlled by the control unit, thereby controlling the reaction speed between the test piece and the brine. The hydrogen produced during the reaction is discharged after passing through the flow meter, proportional valve, and anti-backfire valve on the exhaust pipe. At the same time, the proportional valve maintains a constant pressure inside the reaction vessel. The heat generated by the reaction and the amount of hydrogen produced are obtained by combining the measurement parameters of the sensor components. The camera and lighting components monitor the intensity of the water reaction in real time.

[0017] S5. After the test, control the drainage pump II to pump the solution from the reaction vessel to the wastewater container.

[0018] The beneficial effects of this invention are as follows:

[0019] This application enables precise control of the reaction rate and pressure during the reaction of materials and larger structural components with water, as well as monitoring of the heat generated, gas flow rate, gas concentration, and intensity of the reaction. It can simulate the process, state, and characteristics of the reaction between materials and larger structural components and seawater (lake water) at a certain depth (constant pressure) in the laboratory. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the reaction vessel in this application;

[0021] Figure 2 This is a schematic diagram of the brine preparation container used in this application;

[0022] Figure 3 This is a connection diagram of the control unit in this application;

[0023] Figure 4 This is a connection diagram of the test unit in this application. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this invention, it should be understood that the terms "upper," "lower," "inner," "outer," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this invention and to simplify 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 this invention.

[0028] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0029] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0031] like Figure 1-4 As shown, a water-induced gas release constant pressure test device includes:

[0032] Reaction vessel 1; Reaction vessel 1 includes a cover 11 and a cylindrical body 12. The cylindrical body 12 is formed into a barrel-shaped structure with one end open. The cover 11 is placed on the open end of the cylindrical body 12. A safety valve 13, a pressure sensor 51-1, and a through-hole 14 are installed on the cover 11. A pipeline is connected to the cover, and a gas flow meter 51-2, a proportional valve 15, and a flashback arrestor 16 are installed sequentially on the pipeline. The gas flow meter 51-2 is located close to the cover 11. A hydraulic actuator 18 is installed at the bottom of the cylindrical body 12. The working end of the hydraulic actuator 18 passes through the bottom of the cylindrical body 12 and is placed inside the cylindrical body 12. The working end of the hydraulic actuator 18 is connected to a lifting platform 17. The lowering platform 17 is placed inside the cylinder 12; the level gauge 51-3, temperature sensor 51-5, hydrogen sensor 51-6, oxygen sensor 51-7, camera 51-8, and lighting 115 are installed inside the cylinder; the bottom of the cylinder 12 is provided with an air inlet 19, which is connected to a nitrogen replacement device 110, which is connected to a nitrogen booster device 111; the bottom of the cylinder 12 is provided with a water injection / drainage port I 112, which is connected to the outlet of drainage pump I 113 and the inlet of drainage pump II 114 respectively through a tee; the outlet of drainage pump II 114 is connected to the wastewater container 3.

[0033] A brine preparation container 2 is formed into a barrel shape. A feed inlet 21 is provided at the top of the brine preparation container 2, and a stirring device 22 is provided at the bottom of the brine preparation container 2. The active end of the stirring device 22 passes through the bottom of the brine preparation container 2 and is placed inside the brine preparation container 2. A stirring blade is connected to the active end of the stirring device 22 and is placed inside the brine preparation container 2. A level gauge II 51-4 and a brine concentration sensor 24 are also provided inside the brine preparation container 2. A water injection / drainage outlet II 25 is provided at the bottom of the brine preparation container 2. The water injection / drainage outlet II 25 is connected to the outlet of the water injection pump 26 and the inlet of the drainage pump I 113 via a tee. The inlet of the water injection pump 26 is connected to a water source.

[0034] Wastewater container 3 is used for collecting wastewater after the experiment in the reaction vessel;

[0035] A control unit 4 is used to control the reaction rate of the test specimen inside the reaction vessel 1 while ensuring constant pressure. The control unit 4 includes an interaction module 41, a data communication module 42, a calculation control module 43, and a safety protection module 44. The output of the interaction module 41 is connected to the input of the calculation control module 43, and the output of the calculation control module 43 is connected to the input of the communication module 42. The output of the communication module 42 is connected to the input of the proportional valve 15, the nitrogen purging device 110, the nitrogen booster device 111, the water injection pump 26, and the drainage device 111, respectively. The input terminals of pump I 113, drainage pump II 114, and safety protection module 44 are connected; the output terminals of safety protection module 44 are connected to the input terminals of interaction module 41 and operation control module 43, respectively; the output terminals of proportional valve 15, nitrogen replacement device 110, nitrogen booster device 111, water injection pump 26, drainage pump I 113, and drainage pump II 114 are connected to the input terminals of test unit 5, respectively; the output terminal of test unit 5 is connected to the input terminal of data communication module 42.

[0036] Test unit 5 is used for real-time monitoring of heat generation, hydrogen production, and reaction intensity during the water reaction process. Test unit 5 includes sensor assembly 51, data processing and acquisition instrument 52, and industrial control computer 53. Sensor assembly 51 includes pressure sensor 51-1, gas flow meter 51-2, level gauge I 51-3, level gauge II 51-4, temperature sensor 51-5, hydrogen sensor 51-6, oxygen sensor 51-7, and camera 51-8. The signal output terminals of pressure sensor 51-1, gas flow meter 51-2, level gauge I 51-3, level gauge II 51-4, temperature sensor 51-5, hydrogen sensor 51-6, oxygen sensor 51-7, and camera 51-8 are all connected to the signal input terminal of data processing and acquisition instrument 52. The signal output terminal of data processing and acquisition instrument 52 is connected to the signal input terminal of industrial control computer 53 and the signal input terminal of safety protection module 44, respectively.

[0037] The reaction vessel is a vertical pressure vessel with a certain pressure-bearing capacity. In the reaction vessel, the hatch cover and the cylinder are sealed by a self-sealing compression type seal. The lifting platform is driven by a hydraulic actuator and can move up and down in the cylinder. It is sealed to the bottom of the cylinder by a self-sealing compression type seal or a self-sealing self-tightening type seal. The inner wall material of the reaction vessel is resistant to salt and alkali corrosion, and the auxiliary equipment, pipelines and valves are also resistant to salt and alkali corrosion.

[0038] The brine preparation container has a feed inlet at the top; a stirring device is installed inside the brine preparation container, which has an automatic stirring function; a level gauge II is installed inside the brine preparation container, which has a level detection function; and a brine concentration sensor is installed inside the brine preparation container to determine the salt dissolution status.

[0039] The interactive module converts the input simulated conditions such as water reaction pressure and rate into control loading curves; the data communication module sends control commands and provides feedback test signals; the calculation and control module generates control commands in real time based on the control objectives and test signals; and the safety protection module provides system safety protection.

[0040] A control method for a water-induced gas release constant pressure test device includes the following steps:

[0041] S1. Prepare saline solution; to prepare 1m 3 Taking a 3.5% brine solution as an example, 35 kg of salt is added to the brine preparation container 2 through the inlet 21. The control unit 4, based on the feedback value from the level gauge II51-4, controls the water injection pump 26 to inject 1 ml of salt into the brine preparation container 2. 3 After the water is added, the control unit 4 controls the stirring device 22 to automatically stir according to the feedback value of the brine concentration sensor 24 until the brine is prepared.

[0042] S2. Open the hatch cover 11 of the reaction vessel 1, install the test piece on the lifting platform 17, install the sensor assembly 51 inside the cylinder 12 and pass the test cable through the hatch hole 14 to connect it to the data processing and acquisition instrument 52; after installation, close the hatch cover 11 to seal the reaction vessel 1.

[0043] S3. Control the nitrogen replacement device 110 through the control unit 4 to replace the air in the reaction container 1 with nitrogen, and determine the nitrogen replacement rate based on the oxygen concentration measured by the oxygen sensor 51-7. After the nitrogen replacement is completed, control the drain pump II 114 to inject the brine in the brine preparation container 2 into the reaction container 1. The level gauge II 51-4 monitors the amount of brine injected into the reaction container. After the brine is injected, control the nitrogen pressurization device 111 to control the pressure in the reaction container 1 according to the test requirements (pressurize the reaction container to a certain pressure, such as 4MPa (simulating a water depth of 400m), and set the back pressure valve to release pressure of 4MPa to ensure that the pressure in the reaction container remains constant during the test).

[0044] S4. The descent speed of the lifting platform 17 inside the reaction vessel 1 is controlled by the control unit 4, thereby controlling the reaction speed between the test piece and the brine. The hydrogen gas generated during the reaction is discharged after passing through the flow meter 51-2, proportional valve 15, and anti-backfire valve 16 on the exhaust pipe to ensure the safety of the test. At the same time, the proportional valve 15 maintains a constant pressure inside the reaction vessel. The heat generated by the reaction and the amount of hydrogen produced are obtained by combining the measurement parameters of the sensor assembly 51. The camera and lighting components monitor the intensity of the water reaction in real time.

[0045] S5. After the test, control the drainage pump II114 to pump the solution from reaction vessel 1 to wastewater vessel 3.

[0046] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A water-reactive gas release constant pressure test device, characterized in that, include: The reaction vessel (1) includes a hatch (11) and a cylindrical body (12). The cylindrical body (12) is formed as a barrel-shaped structure with one end open. The hatch (11) is placed on the open end of the cylindrical body (12). A safety valve (13), a pressure sensor (51-1), and a through-hole (14) are installed on the hatch (11). A pipeline is connected to the hatch, and a gas flow meter (51-2), a proportional valve (15), and a backfire prevention valve (16) are installed on the pipeline in sequence. The gas flow meter (51-2) is located close to the hatch (11). A hydraulic actuator (18) is installed at the bottom of the cylindrical body (12). The working end of the hydraulic actuator (18) passes through the bottom of the cylindrical body (12) and is placed inside the cylindrical body (12). The working end of the hydraulic actuator (18) is connected to a lifting platform (17). The lifting platform (17) is placed inside the cylinder (12); the level gauge I (51-3), temperature sensor (51-5), hydrogen sensor (51-6), oxygen sensor (51-7), camera (51-8), and lighting lamp (115) are installed inside the cylinder; an air inlet (19) is set at the bottom of the cylinder (12), and a nitrogen replacement device (110) is connected to the air inlet (19). The nitrogen replacement device (110) is connected to the nitrogen booster device (111). A water injection / drainage port I (112) is set at the bottom of the cylinder (12). The water injection / drainage port I (112) is connected to the outlet of drainage pump I (113) and the inlet of drainage pump II (114) respectively. The outlet of drainage pump II (114) is connected to the wastewater container (3). A brine preparation container (2); the brine preparation container (2) is formed into a barrel-shaped structure. The brine preparation container (2) has an inlet (21) at the top and a stirring device (22) at the bottom. The working end of the stirring device (22) passes through the bottom of the brine preparation container (2) and is placed inside the brine preparation container (2). The working end of the stirring device (22) is connected to a stirring blade, which is placed inside the brine preparation container (2). The brine preparation container (2) is also equipped with a level gauge II (51-4) and a brine concentration sensor (24). The brine preparation container (2) has a water injection / drainage port II (25) at the bottom. The water injection / drainage port II (25) is connected to the outlet of the water injection pump (26) and the inlet of the drainage pump I (113), respectively. The inlet of the water injection pump (26) is connected to a water source. A control unit (4) is used to control the reaction rate of the test specimen in the reaction vessel (1) while ensuring constant pressure. The control unit (4) includes an interaction module (41), a data communication module (42), an operation control module (43), and a safety protection module (44). The output of the interaction module (41) is connected to the input of the operation control module (43), the output of the operation control module (43) is connected to the input of the data communication module (42), and the output of the data communication module (42) is connected to the input of the proportional valve (15), the input of the nitrogen replacement device (110), the input of the nitrogen booster device (111), and the input of the water injection pump (26), respectively. The input terminals of drainage pump I (113), drainage pump II (114), and safety protection module (44) are connected; the output terminal of safety protection module (44) is connected to the input terminal of interactive module (41) and operation control module (43) respectively; the output terminals of proportional valve (15), nitrogen replacement device (110), nitrogen booster device (111), water injection pump (26), drainage pump I (113), and drainage pump II (114) are connected to the input terminal of test unit (5) respectively; the output terminal of test unit (5) is connected to the input terminal of data communication module (42); A test unit (5) for real-time monitoring of heat generation, hydrogen production, and reaction intensity during the water reaction process; the test unit (5) includes a sensor assembly (51), a data processing and acquisition instrument (52), and an industrial control computer (53); the sensor assembly (51) includes a pressure sensor (51-1), a gas flow meter (51-2), a level gauge I (51-3), a level gauge II (51-4), a temperature sensor (51-5), a hydrogen sensor (51-6), an oxygen sensor (51-7), and a camera (51-8); the signal output terminal of the pressure sensor (51-1) The signal output terminals of the gas flow meter (51-2), the liquid level gauge I (51-3), the liquid level gauge II (51-4), the temperature sensor (51-5), the hydrogen sensor (51-6), the oxygen sensor (51-7), and the camera (51-8) are all connected to the signal input terminal of the data processing and acquisition instrument (52). The signal output terminal of the data processing and acquisition instrument (52) is connected to the signal input terminal of the industrial control computer (53) and the signal input terminal of the safety protection module (44), respectively.

2. The control method for a water-induced gas release constant pressure test device according to claim 1, characterized in that, Includes the following steps: S1. Prepare brine; add salt from the inlet (21) of the brine preparation container (2), and control unit (4) controls water pump (26) to inject water into the brine preparation container (2) according to the feedback value of level gauge II (51-4). After the water injection is completed, control unit (4) controls stirring device (22) to automatically stir according to the feedback value of brine concentration sensor (24) until the brine preparation is completed. S2. Open the hatch cover (11) of the reaction vessel (1), install the test piece on the lifting platform (17), install the sensor assembly (51) inside the cylinder (12) and pass the test cable through the hatch hole (14) to connect it to the data processing and acquisition instrument (52); after installation, close the hatch cover (11) and seal the reaction vessel (1); S3. Control the nitrogen replacement device (110) through the control unit (4) to replace the air in the reaction container (1) with nitrogen, and determine the nitrogen replacement rate based on the oxygen concentration measured by the oxygen sensor (51-7); after the nitrogen replacement is completed, control the drain pump II (114) to inject the brine in the brine preparation container (2) into the reaction container (1), and the level gauge II (51-4) monitors the amount of brine injected into the reaction container; after the brine is injected, control the control unit (4) to control the nitrogen pressurization device (111) to control the pressure in the reaction container (1) according to the test requirements; S4. The lowering speed of the lifting platform (17) inside the reaction vessel (1) is controlled by the control unit (4), thereby controlling the reaction speed between the test piece and the brine. The hydrogen produced during the reaction is discharged after passing through the flow meter (51-2), proportional valve (15), and anti-backfire valve (16) on the exhaust pipe. At the same time, the proportional valve (15) maintains the pressure inside the reaction vessel. The heat generated by the reaction and the amount of hydrogen produced are obtained by combining the measurement parameters of the sensor assembly (51). The camera (51-8) and the lighting lamp (115) monitor the intensity of the reaction with water in real time. S5. After the test, control the drainage pump II (114) to pump the solution from the reaction vessel (1) to the wastewater container (3).

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