Supercritical gasification environment material corrosion test system and method

Abstract

The application discloses a supercritical gasification environment material corrosion test experiment system and method, an outlet of a storage tank is connected with an inlet of a supercritical gasification reactor through a material injection valve, an outlet of the supercritical gasification reactor is connected with an inlet of a cooler, an outlet of the cooler is connected with an inlet of a corrosion reaction kettle through a corrosion reaction kettle inlet valve, an outlet of the corrosion reaction kettle is connected with the inlet of the cooler through a corrosion reaction kettle outlet valve, and the outlet of the cooler is connected with a gas production detection device through a cooler flow valve; a first auxiliary heating system is arranged on an outer wall of the supercritical gasification reactor; a second auxiliary heating system is arranged on an outer wall of the corrosion reaction kettle; a first temperature and pressure detection system is arranged on a side wall of the supercritical gasification reactor, and a second temperature and pressure detection system is arranged on a side wall of the corrosion reaction kettle. The system and method can realize real-time monitoring of gasification conditions, the temperature distribution of the reaction system is uniform, the temperature in the reactor is easy to control, and the material corrosion detection and corrosion performance theoretical research of various materials in the supercritical gasification environment can be realized.

Description

Technical Field

[0001] This invention belongs to the field of supercritical gasification technology and relates to an experimental system and method for testing the corrosion of materials in a supercritical gasification environment. Background Technology

[0002] Currently, coal is China's most important fossil fuel and is widely used as a crucial chemical raw material. Despite significant progress in new energy technologies, coal still occupies a vital position in China's energy structure. Traditional direct combustion of coal, using the heat generated to drive gas turbines, releases large amounts of polluting gases. Simultaneously, industrial and agricultural production easily generates large quantities of biomass and organic waste, the indiscriminate discharge of which causes significant pollution. With increasing environmental protection demands, the clean utilization of fossil fuels like coal, biomass materials, and organic waste has become a growing need. Supercritical gasification is an excellent solution to this problem. It is a novel organic material conversion technology that utilizes the excellent physicochemical properties of supercritical fluids, such as high diffusivity, high solubility, and low viscosity, to convert various organic substances into clean energy sources like hydrogen. Furthermore, supercritical gasification produces no NO. X SO X produce.

[0003] Supercritical gasification offers numerous advantages over other gasification technologies, such as high gasification efficiency, high hydrogen yield, and zero emissions of nitrogen oxides and sulfur oxides, thus avoiding the costs associated with desulfurization and denitrification. However, supercritical water gasification also has its drawbacks. To achieve complete gasification of coal and biomass materials, it is necessary to increase the temperature of the gasification reactor. Corrosion is a particularly serious problem in high-temperature environments, and current understanding of the corrosion characteristics of different materials in supercritical gasification environments is lacking. Therefore, there is an urgent need for material selection and optimization to better promote the technology's development.

[0004] Studies have shown that factors influencing supercritical gasification include temperature, pressure, reaction time, and concentration, with temperature being crucial for achieving complete gasification. Preventing equipment corrosion at high temperatures remains a challenge. Using suitable reactor materials, coating their surfaces with anti-corrosion layers, designing dedicated reactors for supercritical gasification processes, and optimizing operating conditions are effective ways to prevent supercritical corrosion. Therefore, experimental research and theoretical analysis of the corrosion performance of different reactor materials in supercritical gas environments are urgently needed.

[0005] Traditional supercritical gasification corrosion testing systems utilize high-temperature reactors. Reactants are added to the reactor, and the system temperature is raised to a supercritical state via electric heating or other methods. After the reaction, the reaction products are collected to study the material's corrosion performance. However, this supercritical gasification corrosion testing system has the following drawbacks: 1) Real-time monitoring of the material's gasification process is not possible, and errors caused by supercritical gasification cannot be eliminated from influencing material corrosion; 2) The high reaction temperature and uneven temperature distribution within the reactor make temperature control difficult. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a supercritical gasification environment material corrosion testing system and method. This system and method can monitor the gasification in real time, and the temperature distribution of the reaction system is uniform and the temperature inside the reactor is easy to control.

[0007] To achieve the above objectives, this invention discloses a supercritical gasification environment material corrosion testing system, including a storage tank, a feeding valve, a supercritical gasification reactor, a cooler, a corrosion reactor inlet valve, a corrosion reactor, a corrosion reactor outlet valve, a cooler flow valve, and a gas production detection device.

[0008] The outlet of the storage tank is connected to the inlet of the supercritical gasification reactor via a feeding valve. The outlet of the supercritical gasification reactor is connected to the inlet of the cooler. The outlet of the cooler is connected to the inlet of the corrosion reactor via the corrosion reactor inlet valve. The outlet of the corrosion reactor is connected to the inlet of the cooler via the corrosion reactor outlet valve. The outlet of the cooler is connected to the gas production detection device via the cooler flow valve.

[0009] A first auxiliary heating system is installed on the outer wall of the supercritical gasification reactor; a second auxiliary heating system is installed on the outer wall of the corrosion reactor; a first temperature and pressure detection system is installed on the side wall of the supercritical gasification reactor; and a second temperature and pressure detection system is installed on the side wall of the corrosion reactor.

[0010] The outlet of the storage tank is connected to the inlet of the supercritical gasification reactor via a feed pump and a feed valve.

[0011] The outlet of the supercritical gasification reactor is connected to the inlet of the cooler via a high-temperature shut-off valve.

[0012] The first auxiliary heating system includes a first auxiliary heating device, a second auxiliary heating device, and a third auxiliary heating device.

[0013] The first auxiliary heating device, the second auxiliary heating device, and the third auxiliary heating device are arranged sequentially along the axial direction of the supercritical gasification reactor.

[0014] The second auxiliary heating system includes a fourth auxiliary heating device and a fifth auxiliary heating device, which are arranged sequentially along the axial direction of the corrosion reactor.

[0015] The first temperature and pressure detection system includes a first temperature and pressure sensor, a second temperature and pressure sensor, and a third temperature and pressure sensor.

[0016] The second temperature and pressure detection system includes a fourth temperature and pressure sensor, a fifth temperature and pressure sensor, and a sixth temperature and pressure sensor.

[0017] This invention discloses an experimental method for testing the corrosion of materials in a supercritical gasification environment, comprising the following steps:

[0018] 1) Store the materials in storage tanks;

[0019] 2) Close the high-temperature shut-off valve;

[0020] 3) Open the injection valve;

[0021] 4) The material in the storage tank is transported to the supercritical gasification reactor. The temperature in the supercritical gasification reactor is supplemented and regulated by the first auxiliary heating system so that the temperature and pressure in the supercritical gasification reactor are maintained above the supercritical state.

[0022] 5) After the supercritical gasification reactor has been running stably for a preset time, open the high-temperature shut-off valve, close the outlet valve of the corrosion reactor and the flow valve of the cooler, so that the high-temperature and high-pressure hot fluid output from the supercritical gasification reactor is injected into the cooler and cooled in the cooler.

[0023] 6) Close the cooler flow valve and open the corrosion reactor inlet valve. The cooled supercritical gasification reaction product output from the cooler enters the corrosion reactor.

[0024] 7) After the pressure inside the corrosion reactor stabilizes, close the inlet valve of the corrosion reactor, open the outlet valve of the corrosion reactor and the flow valve of the cooler, and pass the supercritical gasification reaction product gas in the corrosion reactor into the product gas detection device for component detection.

[0025] 8) Close the cooler flow valve and the corrosion reactor outlet valve, open the corrosion reactor inlet valve, and introduce the supercritical gas produced by the cooled material into the corrosion reactor. Gradually adjust the gas flow rate until the reaction system reaches stability. Then close the corrosion reactor inlet valve and start the second auxiliary heating system to raise the temperature inside the corrosion reactor to the supercritical state, which will also serve to supplement the initial temperature and regulate the temperature.

[0026] 9) After the system has been running stably for a preset time, shut down the second auxiliary heating system, open the outlet valve of the corrosion reactor and the flow valve of the cooler, and pass the supercritical gasification reaction product gas in the corrosion reactor through the cooler into the product gas detection device for component detection.

[0027] 10) Compare the detection results of step 7) with the detection results of step 9) to determine the corrosion theory of the material in a supercritical gas environment.

[0028] The concentration of materials and the concentration of corrosion reaction gases in the supercritical gasification reactor are adjusted by the injection valve and the inlet valve of the corrosion reaction vessel.

[0029] The present invention has the following beneficial effects:

[0030] In the specific operation of the supercritical gasification environment material corrosion testing system and method described in this invention, a first auxiliary heating system is installed on the outer wall of the supercritical gasification reactor; a second auxiliary heating system is installed on the outer wall of the corrosion reactor; a first temperature and pressure detection system is installed on the side wall of the supercritical gasification reactor; and a second temperature and pressure detection system is installed on the side wall of the corrosion reactor. The first auxiliary heating system supplements and regulates the temperature within the supercritical gasification reactor, and the first temperature and pressure detection system detects the temperature and pressure within the supercritical gasification reactor. Similarly, the second auxiliary heating system supplements and regulates the temperature within the corrosion reactor, and the second temperature and pressure detection system detects the temperature and pressure within the corrosion reactor. Therefore, real-time monitoring of the gasification process is possible, and the temperature distribution within the reaction system is uniform, making temperature control within the reactor easy. In practical applications, flexible control of various materials under different temperatures and pressures in the supercritical gasification system is achieved, and the gas production status of different materials is monitored in real time, avoiding the influence of errors in supercritical gasification products on corrosion products and the study of material corrosion performance.

[0031] Furthermore, by adjusting the injection valve and the inlet valve of the corrosion reactor to select the material concentration and corrosion reaction gas concentration of the supercritical gasification reaction, coal slurry, industrial wastewater, organic waste, etc. can be directly used as materials, enabling the mechanistic exploration of corrosion problems arising in the industrial application of clean coal utilization and wastewater treatment. Attached Figure Description

[0032] Figure 1 This is a structural diagram of the present invention.

[0033] Among them, 1 is a storage tank, 2 is a feed pump, 3 is a feeding valve, 4 is a supercritical gasification reactor, 5 is a high-temperature shut-off valve, 6 is a cooler, 7 is an inlet valve for the corrosion reactor, 8 is a corrosion reactor, 9 is an outlet valve for the corrosion reactor, 10 is a cooler flow valve, 11 is a first auxiliary heating device, 12 is a second auxiliary heating device, 13 is a third auxiliary heating device, 14 is a fourth auxiliary heating device, 15 is a fifth auxiliary heating device, 16 is a first temperature and pressure sensor, 17 is a second temperature and pressure sensor, 18 is a third temperature and pressure sensor, 19 is a fourth temperature and pressure sensor, 20 is a fifth temperature and pressure sensor, 21 is a sixth temperature and pressure sensor, and 22 is a gas production detection device. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present invention, 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 merely some embodiments of the present invention, not all embodiments, and are not intended to limit the scope of the present invention. Furthermore, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion regarding the concepts disclosed in the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0035] The accompanying drawings show structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not drawn to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0036] refer to Figure 1 The supercritical gasification environment material corrosion testing experimental system of the present invention includes a storage tank 1, a material pump 2, a feeding valve 3, a supercritical gasification reactor 4, a high-temperature shut-off valve 5, a cooler 6, a corrosion reactor inlet valve 7, a corrosion reactor 8, a corrosion reactor outlet valve 9, a cooler flow valve 10, a first auxiliary heating device 11, a second auxiliary heating device 12, a third auxiliary heating device 13, a fourth auxiliary heating device 14, a fifth auxiliary heating device 15, a first temperature and pressure sensor 16, a second temperature and pressure sensor 17, a third temperature and pressure sensor 18, a fourth temperature and pressure sensor 19, a fifth temperature and pressure sensor 20, a sixth temperature and pressure sensor 21, and a gas production detection device 22.

[0037] The outlet of storage tank 1 is connected to the inlet of supercritical gasification reactor 4 via feed pump 2 and injection valve 3. The outlet of supercritical gasification reactor 4 is connected to the inlet of cooler 6 via high temperature shut-off valve 5. The outlet of cooler 6 is connected to the inlet of corrosion reactor 8 via corrosion reactor inlet valve 7. The outlet of corrosion reactor 8 is connected to the inlet of cooler 6 via corrosion reactor outlet valve 9. The outlet of cooler 6 is connected to gas generation detection device 22 via cooler flow valve 10.

[0038] In this embodiment, the outer wall of the supercritical gasification reactor 4 is provided with a first auxiliary heating device 11, a second auxiliary heating device 12 and a third auxiliary heating device 13.

[0039] In this embodiment, a first temperature and pressure sensor 16, a second temperature and pressure sensor 17, and a third temperature and pressure sensor 18 are provided on the side wall of the supercritical gasification reactor 4.

[0040] In this embodiment, a fourth auxiliary heating device 14 and a fifth auxiliary heating device 15 are provided on the outer wall of the corrosion reactor 8.

[0041] In this embodiment, a fourth temperature and pressure sensor 19, a fifth temperature and pressure sensor 20, and a sixth temperature and pressure sensor 21 are provided on the side wall of the corrosion reactor 8.

[0042] refer to Figure 1 The supercritical gasification environment material corrosion testing system and method of the present invention includes the following steps:

[0043] 1) The material is prepared by the material preparation device and then stored in the storage tank 1;

[0044] 2) Close the high-temperature shut-off valve 5;

[0045] 3) Open injection valve 3;

[0046] 4) The material in the storage tank 1 is transported to the supercritical gasification reactor 4 by the material pump 2. The temperature in the supercritical gasification reactor 4 is supplemented and regulated by the first auxiliary heating device 11, the second auxiliary heating device 12 and the third auxiliary heating device 13, so that the temperature and pressure in the supercritical gasification reactor 4 are maintained above the supercritical state.

[0047] 5) After the supercritical gasification reactor 4 has been running stably for a preset time, open the high temperature shut-off valve 5, close the corrosion reactor outlet valve 9 and the cooler flow valve 10, so that the high temperature and high pressure hot fluid output from the supercritical gasification reactor 4 is injected into the cooler 6 and cooled in the cooler 6.

[0048] 6) Close the cooler flow valve 10 and open the corrosion reactor inlet valve 7. The cooled supercritical gasification reaction product output from the cooler 6 enters the corrosion reactor 8.

[0049] 7) After the pressure inside the corrosion reactor 8 stabilizes, close the corrosion reactor inlet valve 7, open the corrosion reactor outlet valve 9 and the cooler flow valve 10, and pass the supercritical gasification reaction product gas in the corrosion reactor 8 into the product gas detection device 22 for component detection to determine the components of the material corrosion reaction.

[0050] 8) Close the cooler flow valve 10 and the corrosion reactor outlet valve 9, open the corrosion reactor inlet valve 7, and introduce the supercritical gas produced by the cooled material into the corrosion reactor 8. Gradually adjust the gas flow rate until the reaction system reaches stability. Then close the corrosion reactor inlet valve 7 and start the fourth auxiliary heating device 14 and the fifth auxiliary heating device 15 to raise the temperature in the corrosion reactor 8 to the supercritical state, which will also serve to supplement the initial temperature and regulate the temperature.

[0051] 9) After the system has been running stably for a preset time, turn off the fourth auxiliary heating device 14 and the fifth auxiliary heating device 15. After the system has cooled down, open the corrosion reactor outlet valve 9 and the cooler flow valve 10 to introduce the supercritical gasification reaction product gas in the corrosion reactor 8 into the product gas detection device 22 for component detection.

[0052] 10) Compare the detection results of step 7) with the detection results of step 9) to determine the corrosion theory of the material in a supercritical gas environment.

[0053] In operation, the material concentration and corrosion reaction gas concentration of the supercritical gasification reaction can be selected by adjusting the injection valve 3 and the corrosion reaction vessel inlet valve 7. The material applicability is wide, and coal slurry, industrial wastewater, organic waste, etc. can be used directly as materials. The mechanism of corrosion problems generated in the industrial application of clean coal utilization and wastewater treatment is explored.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A material corrosion testing system for a supercritical gasification environment, characterized in that, It includes a storage tank (1), a feeding valve (3), a supercritical gasification reactor (4), a cooler (6), an inlet valve for a corrosion reactor (7), a corrosion reactor (8), an outlet valve for a corrosion reactor (9), a flow valve for a cooler (10), and a gas production detection device (22). The outlet of the storage tank (1) is connected to the inlet of the supercritical gasification reactor (4) via the injection valve (3). The outlet of the supercritical gasification reactor (4) is connected to the inlet of the cooler (6). The outlet of the cooler (6) is connected to the inlet of the corrosion reactor (8) via the corrosion reactor inlet valve (7). The outlet of the corrosion reactor (8) is connected to the inlet of the cooler (6) via the corrosion reactor outlet valve (9). The outlet of the cooler (6) is connected to the gas generation detection device (22) via the cooler flow valve (10). The supercritical gasification reactor (4) is provided with a first auxiliary heating system on its outer wall; the corrosion reactor (8) is provided with a second auxiliary heating system on its outer wall; the supercritical gasification reactor (4) is provided with a first temperature and pressure detection system on its side wall; and the corrosion reactor (8) is provided with a second temperature and pressure detection system on its side wall.

2. The experimental system for testing material corrosion in a supercritical gasification environment according to claim 1, characterized in that, The outlet of the storage tank (1) is connected to the inlet of the supercritical gasification reactor (4) via the feed pump (2) and the injection valve (3).

3. The experimental system for testing material corrosion in a supercritical gasification environment according to claim 1, characterized in that, The outlet of the supercritical gasification reactor (4) is connected to the inlet of the cooler (6) via a high-temperature shut-off valve (5).

4. The experimental system for testing material corrosion in a supercritical gasification environment according to claim 1, characterized in that, The first auxiliary heating system includes a first auxiliary heating device (11), a second auxiliary heating device (12), and a third auxiliary heating device (13).

5. The experimental system for testing material corrosion in a supercritical gasification environment according to claim 4, characterized in that, The first auxiliary heating device (11), the second auxiliary heating device (12) and the third auxiliary heating device (13) are arranged sequentially along the axial direction of the supercritical gasification reactor.

6. The experimental system for testing material corrosion in a supercritical gasification environment according to claim 1, characterized in that, The second auxiliary heating system includes a fourth auxiliary heating device (14) and a fifth auxiliary heating device (15), which are arranged sequentially along the axial direction of the corrosion reactor (8).

7. The experimental system for testing material corrosion in a supercritical gasification environment according to claim 1, characterized in that, The first temperature and pressure detection system includes a first temperature and pressure sensor (16), a second temperature and pressure sensor (17), and a third temperature and pressure sensor (18).

8. The experimental system for testing material corrosion in a supercritical gasification environment according to claim 1, characterized in that, The second temperature and pressure detection system includes a fourth temperature and pressure sensor (19), a fifth temperature and pressure sensor (20), and a sixth temperature and pressure sensor (21).

9. A method for testing material corrosion in a supercritical gasification environment, characterized in that, The supercritical gasification environment material corrosion testing experimental system according to claim 1 includes the following steps: 1) Store the material in storage tank (1); 2) Close the high-temperature shut-off valve (5); 3) Open the injection valve (3); 4) The material in the storage tank (1) is transported to the supercritical gasification reactor (4). The temperature in the supercritical gasification reactor (4) is supplemented and regulated by the first auxiliary heating system so that the temperature and pressure in the supercritical gasification reactor (4) are maintained above the supercritical state. 5) After the supercritical gasification reactor (4) has been running stably for a preset time, open the high temperature shut-off valve (5), close the corrosion reactor outlet valve (9) and the cooler flow valve (10), so that the high temperature and high pressure hot fluid output by the supercritical gasification reactor (4) is injected into the cooler (6) and cooled in the cooler (6). 6) Close the cooler flow valve (10), open the corrosion reactor inlet valve (7), and the cooled supercritical gasification reaction product output from the cooler (6) enters the corrosion reactor (8); 7) After the pressure inside the corrosion reactor (8) stabilizes, close the inlet valve (7) of the corrosion reactor, open the outlet valve (9) of the corrosion reactor and the flow valve (10) of the cooler, and pass the supercritical gasification reaction product gas in the corrosion reactor (8) into the gas production detection device (22) for component detection. 8) Close the cooler flow valve (10) and the corrosion reactor outlet valve (9), open the corrosion reactor inlet valve (7), and introduce the supercritical gasification reaction product of the cooled material into the corrosion reactor (8). Gradually adjust the gas flow rate so that the reaction system reaches stability. Then close the corrosion reactor inlet valve (7) and start the second auxiliary heating system to raise the temperature in the corrosion reactor (8) to the supercritical state, and play the role of initial state temperature supplementation and temperature regulation. 9) After the system has been running stably for a preset time, shut down the second auxiliary heating system, open the outlet valve (9) of the corrosion reactor and the flow valve (10) of the cooler, and pass the supercritical gasification reaction product gas in the corrosion reactor (8) through the cooler (6) into the product gas detection device (22) for component detection. 10) Compare the detection results of step 7) with the detection results of step 9) to determine the corrosion theory of the material in a supercritical gas environment.

10. The experimental method for testing material corrosion in a supercritical gasification environment according to claim 9, characterized in that, The concentration of the supercritical gasification reaction material and the concentration of the corrosion reaction gas in the supercritical gasification reactor are adjusted by the injection valve (3) and the corrosion reaction vessel inlet valve (7).

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