CN103869044A - Testing device and testing method for reaction of carbon dioxide and hot dry rock powder - Google Patents

Abstract

The invention discloses a carbon dioxide-hot dry rock powder reaction test device and a method thereof, and relates to a test technology for geological storage of carbon dioxide in the deep crust. The device is composed of a carbon dioxide gas pressurization system (10), a core reaction system (20), a cold well gas-water separation system (30) and an oil bath constant temperature system (40); the core reaction system (20) includes a pressure supplementary container (21 ), reaction kettle (22), adsorption kettle (23), PID automatic pressure control valve (24), air guide pipe (25); cold well gas-water separation system (30) includes cold well (31), secondary vacuum buffer container (32), primary vacuum buffer container (33), vacuum pump (34) and common valve (35). The data measurement of the present invention is very simple, and the amount of carbon dioxide consumed by the reaction can be calculated only by recording parameters such as temperature and pressure, which can effectively improve the test efficiency; and can provide more reliable theoretical and experimental basis for the carbon dioxide geological storage technology.

Description

Test device and method for carbon dioxide-hot dry rock powder reaction

technical field

The invention relates to a test technology for geological sequestration of carbon dioxide in the deep part of the earth's crust, in particular to a test device and method for simulating the reaction of carbon dioxide-hot dry rock powder under high temperature and high pressure conditions.

Background technique

The development and utilization of energy resources has not only promoted the rapid development of society, but also caused increasingly serious environmental problems. Among them, the use of fossil fuels is currently the largest source of gas pollution and the largest source of emissions of the greenhouse gas carbon dioxide. The emission of carbon dioxide will lead to global warming, which will cause negative environmental and ecological effects. Therefore, effective measures must be taken to control the emission of carbon dioxide and slow down the aggravation of the greenhouse effect. The enhanced geothermal system (EGS) using carbon dioxide as a working medium can not only extract heat but also store carbon dioxide, so it has a good development prospect. In the EGS system, carbon dioxide and dry hot rock powder react chemically under high temperature and high pressure conditions, so as to realize the solidification of carbon dioxide and permanently store it in the deep crust, which is the theoretical basis and key link of carbon dioxide geological storage technology. At present, there is no unified understanding of the optimal temperature and pressure for the reaction of carbon dioxide and hot dry rock powder. The reaction process cannot be accurately measured, the calculation of the amount of carbon dioxide consumed in the actual reaction cannot achieve sufficient accuracy, and the calculation method is not mature enough.

The existing technology at home and abroad for the reaction test device of carbon dioxide under high temperature and high pressure, the temperature range is limited to about 200 ℃, and the operation process of the test is relatively cumbersome, the safety is not high, and the large data measurement error leads to rough test results, which are not convincing. Not strong, and the cost is also very expensive.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, to provide a test device and method for the reaction of carbon dioxide-hot dry rock powder, to realize accurate measurement of a certain amount of hot dry rock powder based on water under high temperature and high pressure conditions. The amount of carbon dioxide that can be consumed when steam is assisted to react with carbon dioxide provides a reliable theoretical and experimental basis for carbon dioxide geological storage technology.

The purpose of the present invention is achieved like this:

1. Design ideas

1. Use the high-temperature oil bath heating system to keep the reaction kettle and the adsorption kettle at a constant temperature;

2. Use the PID automatic pressure control valve to keep the reaction kettle and the adsorption kettle in a constant pressure state;

3. Use the magnetic stirrer that comes with the reaction kettle to make the reactants fully contact and react;

4. By recording parameters such as temperature and pressure, the amount of carbon dioxide consumed by the reaction can be calculated.

2. Technical solution

1. A test device for carbon dioxide-hot dry rock powder reaction (device for short)

The device consists of a carbon dioxide gas pressurization system, a core reaction system, a cold well gas-water separation system and an oil bath constant temperature system;

The core reaction system includes a pressure-replenishing vessel, a reaction kettle, an adsorption kettle, a PID automatic pressure control valve, and an air duct; the PID automatic pressure control valve 2 includes the first, second...5 PID automatic pressure control valves;

The cold well gas-water separation system includes a cold well, a secondary vacuum buffer container, a primary vacuum buffer container, a vacuum pump and ordinary valves;

Its location and connection relationship are:

The reaction kettle and the adsorption kettle are placed in an oil bath constant temperature system;

The hot dry rock powder is placed in the reaction kettle and the adsorption kettle respectively;

The carbon dioxide gas pressurization system, the first PID automatic pressure control valve, the pressure supplement container and the second PID automatic pressure control valve are connected in sequence through the air guide tube to provide a pressurized carbon dioxide gas;

The 2nd PID automatic pressure control valve, the 3rd PID automatic pressure control valve, the reaction kettle, the 4th PID automatic pressure control valve, the cold well, the secondary vacuum buffer container, the common valve, the primary vacuum buffer container and the vacuum pump 34 are connected in sequence through the air duct, Realize the high temperature and high pressure reaction of dry hot rock powder in the reactor, and cool and measure the remaining water vapor in the reactor after the reaction test;

The 2nd PID automatic pressure control valve, the 5th PID automatic pressure control valve and the adsorption kettle are sequentially connected through the air guide tube, so as to realize the measurement of the carbon dioxide adsorbed by the hot dry rock powder G in the adsorption kettle during the reaction test.

2. A method for the reaction of carbon dioxide-hot dry rock powder (referred to as the method)

This method is based on above-mentioned a kind of carbon dioxide and hot dry rock reaction test device, comprises following reaction test, gas-liquid separation test, adsorption test and calculation method:

1) Reaction test

① Take hot dry rock powder with a volume of V ₀ and add it into the reaction kettle after weighing, the mass is m ₀ ;

② Take a sufficient amount of water and put it into the water storage device (measuring cup) in the reaction kettle, the water volume is V _w ;

③Seal the reactor, evacuate the reactor with a vacuum pump, and heat it to the temperature required for the test (room temperature to 350°C), and measure the internal pressure _P1 of the reactor after the internal and external temperature of the reactor is stable;

④ Open the 2nd and 3rd PID automatic pressure control valves, increase the pressure in the reactor to the pressure P (0 to 50MPa) required for the reaction, and record the pressure P _b1 of the pressure supplement container;

⑤ Turn on the reactor agitator to fully react in the reactor, and keep the pressure in the reactor constant through the 2nd and 3rd PID automatic pressure control valves during the reaction process;

⑥ After the reaction is completed, close the 2nd and 3rd PID automatic pressure control valves, and record the pressure P _b2 of the pressure replenishing container at this time;

2) Gas-liquid separation test

After the reaction test is completed, open the cold well at the outlet of the reactor and empty the gas in the reactor (this process needs to ensure that the temperature in the reactor is higher than the boiling point of water to ensure that the remaining carbon dioxide gas and water vapor in the reactor are completely released) , the exhaust gas is cooled at the outlet, and the amount of liquid water V _ws is measured to obtain the volume of remaining water in the reactor;

3) Adsorption test

A. Take out the remaining solid powder V _s in the reactor, dry it and vacuumize it, then weigh it, and the mass is m _s ;

B. Put the weighed solid powder into the adsorption kettle, and heat it to the temperature required for the reaction test (room temperature to 350°C). After the temperature inside and outside the adsorption kettle is balanced, open the 2nd and 5th PID automatic pressure control valves, and add Press to the pressure P required for the reaction test;

C. Keep this state and let it stand for a period of time, that is, when the pressure does not change any more, record the pressure P' of the adsorption kettle at this time;

4) Calculation method

When the temperature is T and the pressure is P, the volume V _wx of consumed water vapor and the volume of supplemented carbon dioxide can be obtained according to the reaction test and gas-liquid separation test data

${\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; wx</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; w</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; ws</span>}}<span\; class="notranslate">\; )</span>}{{\mathrm{<span\; class="notranslate">\; PV</span>}}_{\mathrm{<span\; class="notranslate">\; w</span>}}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; V</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$

${{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; co</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; P</span>}}{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; bu</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$

If the volume of water vapor consumed is converted into the volume of carbon dioxide under the same pressure, it is:

${{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; wco</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; wx</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; w</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; ws</span>}}<span\; class="notranslate">\; )</span>}{{\mathrm{<span\; class="notranslate">\; PV</span>}}_{\mathrm{<span\; class="notranslate">\; w</span>}}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; V</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; )</span>$

Where, V is the volume of the reactor,

V _bu is the volume of the pressure booster container,

The remaining symbols are consistent with those mentioned in the above operation steps;

At the same time, according to the adsorption test, it can be concluded that the adsorption capacity of this powder is:

${{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; xfco</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>\frac{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; P</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; P</span>}}^{<span\; class="notranslate">\; \&prime;</span>}<span\; class="notranslate">\; )</span>}{\mathrm{<span\; class="notranslate">\; P</span>}}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; x</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; )</span>$

in, is the volume of carbon dioxide adsorbed,

V _x is the volume of the adsorption tank,

The remaining symbols are consistent with those mentioned in the above operation steps;

为补压容器补充到反应釜中的CO2的总量

减去反应过程中因消耗水蒸气而补入的二氧化碳量

再减去粉末吸附的CO2的量

即：According to the above test and calculation, the amount of CO2 consumed in the reaction process can be known

The total amount of CO2 added to the reactor for the pressure booster vessel

Subtract the amount of carbon dioxide added due to the consumption of water vapor during the reaction

Subtract the amount of CO2 adsorbed by the powder

Right now:

${{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; xco</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>{{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; co</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; wco</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; xfco</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 4</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; .</span>$

The present invention has following characteristics and positive effect:

1. The whole device adopts modular design, which is convenient for operation and maintenance;

2. The high-temperature part adopts automatic lifting to avoid direct operation by people, so that the test is safe and reliable;

3. The carbon dioxide gas pressurization system uses a booster pump equipped with a high-pressure safety valve to control the ultimate pressure of the system to avoid accidents caused by overpressure;

4. The PID automatic pressure control valve can precisely control the pressure with an accuracy of 0.1MPa.

The present invention has the following advantages and positive effects:

1. Due to the modular design, the high temperature part adopts automatic lifting, which can reduce the cumbersome operation process and maintenance cost in the previous device, and the test process is safer and more reliable. The precision of the PID automatic pressure control valve can reach 0.1MPa, so the present invention The measurement results are more precise.

2. The precise processing and professional assembly of each system and parts in the whole device is conducive to reducing the source of error, reducing the size of the error, and efficient processing of the measurement results, making the present invention more promising and other potential application prospects;

3. The data measurement of the present invention is very simple, and the amount of carbon dioxide consumed by the reaction can be calculated by only recording parameters such as temperature and pressure, which can effectively improve the test efficiency;

4. The variable range of the working pressure and the temperature of the oil bath of the present invention is relatively large, which plays an important role in directly finding the optimum temperature and pressure for the reaction of carbon dioxide and hot dry rock powder. The reaction kettle is equipped with a magnetic stirrer, which can make the The reactants are fully contacted, the reaction is more complete, and the working effect of the whole device can provide a more reliable theoretical and experimental basis for carbon dioxide geological storage technology;

In a word, because of its low cost, simple operation, safety and reliability, and high measurement accuracy, the present invention has great theoretical research and laboratory test value.

Description of drawings

Fig. 1 is the structural block diagram of carbon dioxide-hot dry rock reaction test device;

Fig. 2 is a structural block diagram of the core reaction system;

Fig. 3 is a structural block diagram of the cold well gas-water separation system.

In the picture:

10—Carbon dioxide gas pressurization system;

20—Core Reaction System,

21—pressure supplement container;

22—reactor;

23—Absorptive kettle;

24—PID automatic pressure control valve,

241, 242...245—1st, 2nd...5 PID automatic pressure control valves;

25—tracheal tube;

30 - Cold Well Gas-Water Separation System,

31—cold well; 32—secondary vacuum buffer container; 33—first-level vacuum buffer container;

34—vacuum pump; 35—ordinary valve;

T—thermometer;

G—hot dry rock powder.

Detailed ways

Below in conjunction with accompanying drawing and embodiment describe in detail:

1. Device

1. Overall

As shown in Fig. 1, Fig. 2 and Fig. 3, the device consists of a carbon dioxide gas pressurization system 10, a core reaction system 20, a cold well gas-water separation system 30 and an oil bath constant temperature system 40;

The core reaction system 20 includes a pressure supplementing container 21, a reaction kettle 22, an adsorption kettle 23, a PID automatic pressure control valve 24, and an air guide pipe 25; the PID automatic pressure control valve 24 includes the first, second...5 PID automatic pressure control valves 241, 242 ... 245;

The cold well gas-water separation system 30 includes a cold well 31, a secondary vacuum buffer container 32, a primary vacuum buffer container 33, a vacuum pump 34 and a common valve 35;

Its location and connection relationship are:

The reaction kettle 22 and the adsorption kettle 23 are placed in the oil bath constant temperature system 40;

The hot dry rock powder G is placed in the reaction kettle 22 and the adsorption kettle 23 respectively;

The carbon dioxide gas pressurization system 10, the first PID automatic pressure control valve 241, the pressure supplement container 21 and the second PID automatic pressure control valve 242 are sequentially connected through the air guide tube 25 to provide a pressurized carbon dioxide gas;

The 2nd PID automatic pressure control valve 242, the 3rd PID automatic pressure control valve 243, the reactor 22, the 4th PID automatic pressure control valve 244, the cold well 31, the secondary vacuum buffer container 32, the ordinary valve 35, the primary vacuum buffer container 33 and The vacuum pump 34 is sequentially connected through the air duct 25 to realize the high-temperature and high-pressure reaction of the hot dry rock powder G in the reactor 22, and to cool and measure the remaining water vapor in the reactor 22 after the reaction test;

The 2nd PID automatic pressure control valve 242, the 5th PID automatic pressure control valve 245 and the adsorption kettle 23 are connected in sequence through the air duct 25 to realize the measurement of the carbon dioxide adsorbed by the hot dry rock powder G in the adsorption kettle 23 during the reaction test.

2. Working principle

The test of the present invention includes reaction test, gas-liquid separation test and adsorption test in core reaction system 20 and cold well gas-water separation system 30, and with carbon dioxide gas pressurization system 10 and oil bath constant temperature system 40 as auxiliary equipment, reaction The material is hot dry rock powder G, carbon dioxide and water vapor.

The carbon dioxide gas pressurization system 10 is directly connected with the pressure supplement container 21 as a pressure source and is equipped with a high-pressure safety valve to provide the pressure required by the system; The reaction kettle 22 and the adsorption kettle 23 are connected, so that the reaction kettle 22 and the adsorption kettle 23 are in a constant pressure state during the whole reaction process; the reaction kettle 22 and the adsorption kettle 23 are all placed in the oil bath constant temperature system 40 during their respective use stages , so that the whole reaction process is in a constant temperature state; then the reactor 22 is connected to the cold well gas-water separation system 30 through the air duct 25, and a vacuum pump 34 and a vacuum buffer container are equipped to fully release the remaining water in the reactor 22 after the reaction Water absorbed by steam and hot dry rock powder G.

2. Functional components

1) Carbon dioxide gas pressurization system 10

The carbon dioxide gas pressurization system 10 is composed of a booster pump, which is equipped with a high-pressure safety control valve, which can provide a pressure source for the system and prevent overpressure accidents.

2) Core Reaction System 20

As shown in Fig. 2, the core reaction system 20 includes a pressure-reinforcing vessel 21, a reaction kettle 22, an adsorption vessel 23, a PID automatic pressure control valve 24, and an air duct 25, wherein the pressure-replenishing vessel 21, the reaction vessel 22, and the adsorption vessel 23 are conventional high-pressure The kettle has the characteristics of high temperature and high pressure resistance, can withstand a high temperature of about 350°C and a pressure of about 50MPa, and is equipped with a thermometer T, which can display the temperature inside and outside the container in real time; on the one hand, the PID automatic pressure control valve 24 can be used as a switch to control The circulation of high-pressure airflow can also display the pressure inside each kettle in real time, with an accuracy of 0.1MPa.

① Pressure supplement container 21

The pressure boosting container 21 is used to store carbon dioxide gas under high pressure.

② Reactor 22

The reaction kettle 22 is used as a reaction vessel for carbon dioxide and hot dry rock powder G, and has a magnetic stirrer to fully contact the reactants.

③Absorptive kettle 23

The adsorption tank 23 is used to measure the amount of carbon dioxide absorbed by the hot dry rock powder G in the reaction tank 22 during the reaction test.

④PID automatic pressure control valve 24

PID automatic pressure control valve 24 is an automatic pressure control valve based on PID control technology, including the first, second...5PID automatic pressure control valves 241, 242...245, which can realize automatic pressure control and data output, and the accuracy can reach 0.1Mpa.

⑤ Airway 25

The air duct 25 is a conventional conduit that serves on the one hand as a connector for the components and on the other hand as a channel for the high-pressure air flow.

3) Cold well gas-water separation system 30

As shown in Figure 3, the cold well gas-water separation system 30 includes a cold well 31, a secondary vacuum buffer container 32, a primary vacuum buffer container 33, a vacuum pump 34 and a common valve 35, which are used to realize the recovery of the remaining water vapor in the reactor after the reaction test. cooling and metering;

① cold well 31

The cold well 31 is a standard part, which plays a cooling role, and the temperature range is -5 to 10°C;

②Secondary vacuum buffer container 32

The secondary vacuum buffer container 32 is a standard part, which plays a secondary buffer role when used for vacuuming;

③Level 1 vacuum buffer container 33

The primary vacuum buffer container 33 is a standard part, which plays a buffering role when used for vacuuming;

④ Vacuum pump 34

The vacuum pump 34 is a standard part and is used for pumping air to make the reaction kettle 22 reach the vacuum required by the test;

⑤ Ordinary valve 35

Ordinary valve 35 is a standard part and plays a control role.

4) Oil bath constant temperature system 40

The oil bath constant temperature system 40 is a standard part to realize the constant temperature control of the system. The temperature controllable range is from room temperature to 350°C, and the accuracy can reach ±0.5°C. An automatic heating device is used to avoid direct operation by humans and ensure the safety and reliability of the test.

After testing, the present invention has the following basic performance indicators:

1. Working pressure: 0~50MPa, accuracy ±0.1MPa;

2. Oil bath temperature: room temperature to 350°C, accuracy ±0.5°C;

3. Reactor specification: 50MPa/1L/350℃, magnetic stirring;

4. Cold well temperature: -5～10℃.

2. Application

The traditional carbon dioxide-hot dry rock powder reaction test device under high temperature and high pressure has narrow temperature range, cumbersome test operation process, low precision and high cost. The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, to provide a test device and method for the reaction of carbon dioxide-hot dry rock powder, to realize accurate measurement of a certain amount of hot dry rock powder based on water under high temperature and high pressure conditions. The amount of carbon dioxide that can be consumed when steam is assisted to react with carbon dioxide provides a reliable theoretical and experimental basis for carbon dioxide geological storage technology.

Claims (2)

1. A test device for carbon dioxide-hot dry rock powder reaction, characterized in that: It consists of a carbon dioxide gas pressurization system (10), a core reaction system (20), a cold well gas-water separation system (30) and an oil bath constant temperature system (40); The core reaction system (20) includes a pressure-reinforcing container (21), a reaction kettle (22), an adsorption kettle (23), a PID automatic pressure control valve (24), and an air duct (25); the PID automatic pressure control valve (24) includes No. 1, 2...5 PID automatic pressure control valves (241, 242...245); The cold well gas-water separation system (30) includes a cold well (31), a secondary vacuum buffer container (32), a primary vacuum buffer container (33), a vacuum pump (34) and an ordinary valve (35); Its location and connection relationship are: The reaction kettle (22) and the adsorption kettle (23) are placed in the oil bath constant temperature system (40); The hot dry rock powder (G) is placed in the reaction kettle (22) and the adsorption kettle (23) respectively; The carbon dioxide gas pressurization system (10), the first PID automatic pressure control valve (241), the pressure supplement container (21) and the second PID automatic pressure control valve (242) are connected in sequence through the air guide tube (25), providing a pressurized carbon dioxide gas; The 2nd PID automatic pressure control valve (242), the 3rd PID automatic pressure control valve (243), the reactor (22), the 4th PID automatic pressure control valve (244), the cold well (31), the secondary vacuum buffer container (32) , the common valve (35), the primary vacuum buffer container (33) and the vacuum pump (34) are sequentially connected through the air duct (25) to realize the high temperature and high pressure reaction of the hot dry rock powder (G) in the reactor (22), and After the reaction test, the remaining water vapor in the reactor (22) is cooled and measured; The 2nd PID automatic pressure control valve (242), the 5th PID automatic pressure control valve (245) and the adsorption kettle (23) are connected in sequence through the air guide pipe (25), so as to realize the dry hot rock powder (G) in the adsorption kettle (23) Measurement of adsorbed carbon dioxide during the reaction test. 2. by the test method of the test device of a kind of carbon dioxide-hot dry rock powder reaction according to claim 1, it is characterized in that: 1) Reaction test ① Take hot dry rock powder with a volume of V ₀ and add it into the reaction kettle after weighing, the mass is m ₀ ; ② Take a sufficient amount of water and put it into the water storage device (measuring cup) in the reaction kettle, the water volume is V _w ; ③Seal the reactor, evacuate the reactor with a vacuum pump, and heat it to the temperature required for the test (room temperature to 350°C), and measure the internal pressure _P1 of the reactor after the internal and external temperature of the reactor is stable; ④ Open the 2nd and 3rd PID automatic pressure control valves, increase the pressure in the reactor to the pressure P (0 to 50MPa) required for the reaction, and record the pressure P _b1 of the pressure supplement container; ⑤ Turn on the reactor agitator to fully react in the reactor, and keep the pressure in the reactor constant through the second and third PID automatic pressure control valves during the reaction; ⑥ After the reaction is completed, close the 2nd and 3rd PID automatic pressure control valves, and record the pressure P _b2 of the pressure replenishing container at this time; 2) Gas-liquid separation test After the reaction test is completed, open the cold well at the outlet of the reactor and empty the gas in the reactor (this process needs to ensure that the temperature in the reactor is higher than the boiling point of water to ensure that the remaining carbon dioxide gas and water vapor in the reactor are completely released) , the exhaust gas is cooled at the outlet, and the amount of liquid water V _ws is measured to obtain the volume of remaining water in the reactor; 3) Adsorption test A. Take out the remaining solid powder V _s in the reactor, dry it and vacuumize it, then weigh it, and the mass is m _s ; B. Put the weighed solid powder into the adsorption kettle, and heat it to the temperature required for the reaction test (room temperature to 350°C). After the temperature inside and outside the adsorption kettle is balanced, open the 2nd and 5th PID automatic pressure control valves, and add Press to the pressure P required for the reaction test; C. Keep this state and let it stand for a period of time, that is, when the pressure does not change any more, record the pressure P' of the adsorption kettle at this time; 4) Calculation method When the temperature is T and the pressure is P, the volume V _wx of consumed water vapor and the volume of supplemented carbon dioxide can be obtained according to the reaction test and gas-liquid separation test data

${\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; wx</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; w</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; ws</span>}}<span\; class="notranslate">\; )</span>}{{\mathrm{<span\; class="notranslate">\; PV</span>}}_{\mathrm{<span\; class="notranslate">\; w</span>}}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; V</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$ ${{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; co</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; P</span>}}{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; bu</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$ If the volume of water vapor consumed is converted into the volume of carbon dioxide under the same pressure, it is: ${{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; wco</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; wx</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; w</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; ws</span>}}<span\; class="notranslate">\; )</span>}{{\mathrm{<span\; class="notranslate">\; PV</span>}}_{\mathrm{<span\; class="notranslate">\; w</span>}}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; V</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; )</span>$ Where, V is the volume of the reactor, V _bu is the volume of the pressure booster container, The remaining symbols are consistent with those mentioned in the above operation steps; At the same time, according to the adsorption test, it can be concluded that the adsorption capacity of this powder is: ${V_{\mathrm{xfco}}}_2=\frac{(P-P^{\&prime;})}{P}(V_x-V_{\mathrm{the\; s}})---\left(3\right)$ in,

is the volume of carbon dioxide adsorbed, V _x is the volume of the adsorption tank, The remaining symbols are consistent with those mentioned in the above operation steps; According to the above test and calculation, the amount of CO2 consumed in the reaction process can be known

The total amount of CO2 added to the reactor for the pressure booster vessel

Subtract the amount of carbon dioxide added due to the consumption of water vapor during the reaction

Subtract the amount of CO2 adsorbed by the powder

Right now: ${{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; xco</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>{{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; co</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; wco</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; xfco</span>}}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 4</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; .</span>$

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