CN203164076U - Device for determining gas-liquid chemical reaction rate based on volumetric method - Google Patents

Abstract

The invention relates to a device for measuring gas-liquid chemical reaction rate based on a volumetric method, which belongs to the field of chemical reaction engineering. It consists of eight parts: gas source system, vacuum system, gas metering system, gas-liquid reaction system, heating system, stirring system, cooling system and data acquisition system. The solution and the magnetic stirrer are placed in the gas-liquid reaction chamber through the liquid inlet, and the metering chamber and the gas-liquid reaction chamber are evacuated by a vacuum pump to remove residual gas, and the vacuum solenoid valve is closed, and the gas at a specified pressure is put into the metering chamber, and its Mole number, close the gas source solenoid valve, and then control and stir the solution. When the reaction conditions are reached, open the pressure equalization solenoid valve and inject the reaction gas into the gas-liquid reaction chamber. When the pressure is balanced, close the pressure equalization solenoid valve. The rate of chemical reaction is obtained by monitoring the change of gas pressure in the gas-liquid reaction chamber with time. The utility model has the advantages of automatic testing process, high precision of temperature control and temperature measurement, and convenient operation.

Description

A device for measuring gas-liquid chemical reaction rate based on volumetric method

technical field

The utility model belongs to the field of chemical reaction engineering, and relates to a device for measuring gas-liquid chemical reaction rate based on a volumetric method, which is suitable for measuring the rate constant when gas and liquid undergo chemical reactions, and obtaining a corresponding rate equation.

Background technique

Gas-liquid reaction is a typical process control link in chemical reaction engineering, and plays an important role in the fields of industry, medical treatment, teaching, and scientific research. For example, wet method is used to remove SO ₂ from power plants or kiln tail gas, copper ammonia solution is used to absorb CO in ammonia synthesis industry, alkaline solution is used to absorb CO ₂ in industrial biogas, NaOH solution is used to absorb residual CO ₂ in copper scrubbing, In chemical analysis, copper ammonia solution is used to calibrate the oxygen concentration, and in medical oxygen, silver ammonia solution is used to detect trace CO, etc. The speed of reaction determines the input capacity of raw materials, the output capacity of products and the size of the reaction vessel, which directly affects the one-time investment and operation and maintenance costs of the enterprise. Efficient reaction conditions play an important role in reducing energy consumption, improving efficiency and increasing profits. Therefore, the key to solving the above problems is to measure the rate of chemical reaction and obtain the corresponding rate equation.

Usually, the concentration of the liquid in the gas-liquid reaction is manually measured by titration, chromatography or pH value method, etc., the data acquisition lags behind, and the instantaneous value of the chemical reaction rate cannot be obtained, which affects the measurement accuracy of the data; and gas is a kind of The compressible medium, whether it is a reactant or a product, its volume or pressure will change instantaneously with the progress of the reaction, and the chemical reaction process is closely tracked, reflecting the real-time status of the chemical reaction. In addition, for high-temperature and high-pressure reaction conditions, the liquid analysis process is more difficult, and the measurement of liquid properties at room temperature and pressure cannot reflect the specific conditions of high-temperature and high-pressure conditions. At this time, the change of gas properties is more sensitive, and the physical parameters of the measured gas have expanded. The measurement range for the rate of a chemical reaction.

At present, reports on the determination of chemical reaction rates are mostly found in teaching experiments. For example, the article "Improvement of Experimental Devices for Measuring the Reaction Rate of Zinc and Sulfuric Acid" (Experimental Teaching and Instruments, 2010, (9): 30) uses a syringe to measure the volume of gas "' The effect of different catalysts on the reaction rate of hydrogen peroxide decomposition'Experimental device design and exploration" (Journal of Cangzhou Teachers College, 2008, 24 (3): 42) uses soap bubble flowmeter to measure the volume of gas generated; "Reaction of hydrochloric acid and acetic acid The article “Experimental Device for Rate Comparison and Ionization Balance Movement” (Teaching Instruments and Experiments, 2004, (4): 31-32) uses a graduated cylinder to measure the volume of the generated gas. These methods belong to the constant pressure method, and the chemical reaction rate is calculated by measuring the gas volume change, and its shortcomings are obvious. First of all, syringes, soap bubble flowmeters or measuring cylinders cannot automatically measure the volume, and must be manually operated and read, which increases the error and subjectivity of the indication; secondly, during the gas measurement process, due to the residual gas in the container, Errors caused by frictional resistance or soap bubble collapse are difficult to eliminate; thirdly, such experiments all use glass containers, which cannot be applied to high-pressure or high-temperature reaction conditions; finally, for the reaction rate measurement process under complex conditions, the labor cost is increased due to the inability to realize automation , it is difficult to improve efficiency.

Contents of the invention

The purpose of this utility model is to develop a device based on the volumetric method to measure the gas-liquid chemical reaction rate. Through the constant volume variable pressure method, the gas pressure can be dynamically measured in real time through a high-precision pressure sensor under the condition that the gas volume is constant, so as to avoid It eliminates the shortcomings of the traditional constant pressure method that cannot be automated in measuring volume, increases labor costs, and is difficult to improve efficiency. It has real-time and reliability.

A device for measuring the gas-liquid chemical reaction rate based on the volumetric method, which uses the constant volume method to control the reactants or products by using the buffer container to measure the gas intake or gas output step by step, and monitor the gas pressure in the chemical reaction The consumption of reactants or the output rate of products can be calculated in due course, so as to calculate the rate constant and rate equation of the chemical reaction process. The device consists of eight parts: gas source system, vacuum system, gas metering system, gas-liquid reaction system, heating system, stirring system, cooling system and data acquisition system.

The gas source system is composed of a gas source cylinder to be tested, a pressure reducing valve, a gas source solenoid valve and a gas source connection flange. The gas source gas cylinder to be tested is used to hold the gas that participates in the chemical reaction. Due to the high pressure of the gas cylinder, the pressure needs to be reduced to the pressure required for the chemical reaction operation through the pressure reducing valve. The pressure reducing valve is connected with the gas to be tested through the high pressure sealing thread connected to the source gas cylinder. The air source solenoid valve is opened or closed by program control, and is used to control the decompressed air source to be measured to enter the metering chamber. The air source solenoid valve is connected with the pressure reducing valve and the air source connecting flange through the pipeline, and the air source connecting flange For connecting the air supply system and the metering chamber.

The vacuum system consists of a vacuum connecting flange, a vacuum solenoid valve and a vacuum pump. The vacuum system is connected with the metering chamber through the vacuum connection flange, which is used to evacuate the metering chamber and eliminate the influence of residual gas. The vacuum pump, the vacuum solenoid valve and the vacuum connection flange are connected through pipelines, and the vacuum solenoid valve is opened or closed by program control.

The gas metering system is composed of a metering chamber, a metering chamber thermocouple casing, a metering chamber thermocouple, a pressure equalizing connection flange, a metering chamber pressure measuring connection flange and a metering chamber pressure sensor. The thermocouple of the metering chamber is placed in the thermocouple casing of the metering chamber, and the thermocouple casing of the metering chamber extends into the metering chamber, and is connected with the metering chamber through a welding process. The thermocouple of the metering chamber is used to measure the temperature of the gas in the metering chamber. The metering chamber pressure sensor is connected with the metering chamber through the metering chamber pressure measuring connecting flange, and is used to measure the pressure of the gas in the metering chamber. The metering chamber is connected with the pressure equalizing solenoid valve through the pressure equalizing connecting flange.

The gas-liquid reaction system consists of a pressure equalizing solenoid valve, a reaction chamber pressure sensor, a gas-liquid reaction chamber, a liquid inlet, a gas thermocouple casing, a gas temperature-measuring thermocouple, a liquid thermocouple casing and a liquid temperature-measuring thermoelectric Couple composition; the gas temperature measuring thermocouple is placed in the gas thermocouple casing, the gas temperature measuring casing is inserted into the upper part of the gas-liquid reaction chamber, and connected with the gas-liquid reaction chamber through welding process, and the gas temperature measuring thermocouple is used to measure The temperature of the gas in the upper space of the gas-liquid reaction chamber; the liquid thermocouple is placed in the liquid thermocouple sleeve, and the liquid thermocouple sleeve is inserted into the lower part of the gas-liquid reaction chamber, but it is higher than the height of the magnetic stirrer. Through the welding process and the gas The liquid reaction chambers are connected together, and the liquid temperature measuring thermocouple is used to measure the temperature of the liquid in the lower space of the gas-liquid reaction chamber; the liquid inlet is a pipeline with a square nut, which is connected with the gas-liquid reaction chamber through a welding process. When putting in or pouring out the liquid, putting in or pouring out the magnetic stirrer, it is sealed by matching bolts when working; the pressure sensor of the reaction chamber is installed above the Y-shaped cooling coil through threads, and is used to measure the pressure of the gas in the gas-liquid reaction chamber , when the gas-liquid reaction temperature is high, the liquid vapor is cooled by the cooling medium in the cooling water jacket to ensure that the reaction chamber pressure sensor measures the pressure of the reaction gas; the inner diameter of the Y-shaped cooling coil is between 4 and 7mm, and Large, the heat conduction cooling effect is poor, the inner diameter is too small, the condensed liquid will block the pipeline due to surface tension;

The gas heating system is composed of a heating wire, a metal spreader, a temperature control thermocouple, a heating cable and a temperature control instrument. The heating wire is evenly wound inside the metal heat spreader through the insulating material, and connected to the temperature control instrument through the heating cable. The temperature control thermocouple is placed inside the metal heat spreader and is in close contact with the gas-liquid reaction chamber to achieve rapid temperature measurement and control. The role of temperature. The metal heat spreader surrounds the periphery of the gas-liquid reaction chamber, and its bottom ends are anastomosed together by the metal crimping process. The metal heat spreader evenly distributes the heat generated by the heating wire on the outer wall of the gas-liquid reaction chamber, and heats the gas-liquid through heat conduction. The reactants inside the reaction chamber are heated.

The gas stirring system consists of a magnetic stirrer, a magnetic stirrer and a stirring acceleration knob. The magnetic stirrer is put into the gas-liquid reaction chamber through the liquid inlet. The magnetic stirrer is a magnetic material coated with wear-resistant organic materials, and it performs circular motion in the rotating moving magnetic field. The magnetic stirrer generates a rotating magnetic field, and the frequency of the rotating magnetic field can be changed by adjusting the stirring acceleration knob, thereby changing the circular motion speed of the magnetic stirrer.

The cooling system is composed of a cooling water jacket, an inlet of the cooling water jacket, an outlet of the cooling water jacket, a Y-shaped cooling coil and a connecting flange of the coil. The upper part of the Y-shaped cooling coil is a Y-shaped bifurcation, which allows the condensed liquid to flow into the gas-liquid reaction chamber. The lower part is a coiled or spiral pipeline that spirals upward. The bottom end is connected to the gas-liquid reaction chamber through a coil connecting flange. The cooling medium flows through the outside of the Y-shaped cooling coil, and the cooling medium enters from the inlet of the cooling water jacket and overflows from the outlet of the cooling water jacket. The Y-shaped cooling coil and the cooling water jacket (16) are connected together by welding.

The data acquisition system is composed of a data acquisition and valve control circuit board and a host computer. The data acquisition and valve control circuit board converts the voltage or current analog signals from the metering chamber thermocouple, gas temperature measuring thermocouple, liquid temperature measuring thermocouple, metering chamber pressure sensor and reaction chamber pressure sensor into digital signals and then transmits them to the host Computers as computational data. When the pressure conditions meet the set requirements, the host computer sends a digital switch instruction to the data acquisition and valve control circuit board, and the data acquisition and valve control circuit board converts the digital signal into a voltage signal to drive the air source solenoid valve, vacuum solenoid valve or equalizer. The pressure solenoid valve is opened or closed to realize the automatic control of the program.

The thermocouple casing of the metering chamber, the gas thermocouple casing and the liquid thermocouple casing are processed and thinned at the front end to enhance the heat conduction performance. Sensitivity of thermocouples and body temperature thermocouples.

The test process of the gas-liquid reaction rate of the device for measuring the gas-liquid chemical reaction rate based on the volumetric method is as follows: first, a magnetic stirrer is placed in the gas-liquid reaction chamber through the liquid inlet, and the prepared solution is passed through the funnel through the inlet. Put the liquid port into the gas-liquid reaction chamber, seal the liquid inlet, place the gas-liquid reaction chamber on the magnetic stirrer, turn on the switch of the magnetic stirrer, turn the stirring acceleration knob to make the magnetic stirrer rotate in the liquid, open The temperature control instrument sets the heating temperature, controls the temperature of the gas-liquid reaction chamber, and turns on the upper computer and the data acquisition and valve control circuit board. Then, turn on the vacuum pump, open the vacuum solenoid valve, pressure equalization solenoid valve and air source solenoid valve, vacuumize the gas circuit and cavity, remove impurity gas and liquid upper vapor, and when the pressure reaches the specified value, close the vacuum solenoid valve, Air source solenoid valve and pressure equalization solenoid valve, open the gas source cylinder to be measured, when the pressure of the pressure reducing valve is adjusted to the specified pressure value, open the air source solenoid valve, when the pressure value measured by the pressure sensor of the metering chamber and the thermocouple of the metering chamber After the measured temperature is stable, record the gas pressure and temperature values in the metering chamber. Since the volume of the metering chamber is known, the number of moles of gas entering the metering chamber is calculated according to the gas state equation. Afterwards, when the difference between the value of the liquid temperature measuring thermocouple in the gas-liquid reaction chamber and the set value of the temperature control instrument is constant, record the pressure value of the pressure sensor in the reaction chamber and the temperature value of the gas temperature measuring thermocouple, according to the volume of the gas-liquid reaction chamber Calculate the gas volume in the upper space of the gas-liquid reaction chamber with the volume of the solution contained, and then calculate the moles of liquid vapor according to the gas state equation. At this time, open the pressure equalizing solenoid valve, because the gas pressure in the metering chamber is higher than the vapor pressure in the gas-liquid reaction chamber, the gas in the metering chamber enters the gas-liquid reaction chamber through the pressure equalizing solenoid valve, and chemically reacts with the liquid. When the difference between the pressure value measured by the pressure sensor and the pressure value measured by the pressure sensor in the reaction chamber is constant, the pressure equalizing solenoid valve is closed, and the pressure in the gas-liquid reaction chamber changes with time through the data acquisition and valve control circuit board. The law of partial pressure can calculate the number of moles of gas reduced in the gas-liquid reaction chamber, thereby calculating the rate of the gas-liquid reaction.

The length of the Y-shaped cooling coil and the temperature of the cooling medium in the cooling water jacket are determined according to actual needs to ensure that there is no condensed liquid at the pressure sensor in the reaction chamber.

The temperature-controlling thermocouple can adopt temperature-measuring components such as thermal resistors and thermistors that meet the temperature-controlling accuracy requirements.

The metal heat spreader is made of copper, aluminum or stainless steel with good thermal conductivity.

The metering chamber thermocouple, liquid temperature measuring thermocouple and gas temperature measuring thermocouple can be replaced by other temperature measuring components that meet the field accuracy requirements, such as thermal resistors and thermistors.

The utility model proposes methods such as constant volume pressure measurement of the metering chamber, gas-liquid separation temperature measurement, uniform heating of the annular metal, external heating temperature control, cooling and liquid removal, and divided dosage of reaction gas to ensure the stability and reliability of the test performance of the device of the invention. , simple and convenient, it is a powerful test device for studying the gas-liquid reaction rate, suitable for the reaction of various gases and liquids at different temperatures and pressures, and can also measure the reaction rate of the liquid desorption gas reverse process and the dynamic state of the gas-liquid reaction Static gas uptake at equilibrium.

Description of drawings

Fig. 1 is the working principle schematic diagram of the utility model device;

In Figure 1: 1. gas cylinder to be tested; 2. pressure reducing valve; 3. gas source solenoid valve; 4. gas source connecting flange; 5. metering chamber; 6. metering chamber thermocouple sleeve; 7. Metering chamber thermocouple; 8. Pressure equalizing connecting flange; 9. Measuring chamber pressure measuring connecting flange; 10. Measuring chamber pressure sensor; 11. Vacuum connecting flange; 12. Vacuum solenoid valve; 13. Vacuum pump; 14. Average 15. Reaction chamber pressure sensor; 16. Cooling water jacket; 17. Cooling water jacket inlet; 18. Cooling water jacket outlet; 19. Y-shaped cooling coil; 20. Coil connecting flange; 21. Gas-liquid reaction 22. Liquid inlet; 23. Gas thermocouple casing; 24. Gas temperature measuring thermocouple; 25. Liquid thermocouple casing; 26. Liquid temperature measuring thermocouple; 27. Heating wire; 28. Metal Spreader; 29. Magnetic Stirrer; 30. Magnetic Stirrer; 31. Stirring Acceleration Knob; 32. Temperature Control Thermocouple; 33. Heating Cable; 34. Temperature Control Instrument; 35. Data Acquisition and Valve Control Circuit Board ; 36. Host computer;

Fig. 2 is all thermocouples and sleeve pipe sketches thereof that are placed in the container in the utility model device;

6. Measuring chamber thermocouple casing; 7. Measuring chamber thermocouple; 23. Gas thermocouple casing; 24. Gas temperature measuring thermocouple; 25. Liquid thermocouple casing; 26. Liquid temperature measuring thermocouple.

Detailed ways

Embodiments Measure the chemical reaction rate of monoethanolamine solution (MEA) and carbon dioxide gas, select 500mL of 30% MEA solution for use, the volume of metering chamber 5 is 500mL, the volume of gas-liquid reaction chamber 21 is 1000mL, metering chamber thermocouple 7, gas temperature measuring thermoelectric Both the couple 24 and the liquid temperature measuring thermocouple 26 are first-class T-type thermocouples with an accuracy of ±0.5°C. The metering chamber pressure sensor 10 adopts a piezoelectric sensor with a pressure range of 0~1MPa and an accuracy of ±0.06%. The reaction chamber pressure sensor 15 adopts a piezoelectric sensor with a working pressure range of 0~0.2MPa, a maximum pressure of 1MPa, and an accuracy of ±0.06%. piezoresistive sensor. The pumping rate of the vacuum pump 13 is 0.5L/s, the gas source gas cylinder 1 to be tested is a 40L carbon dioxide gas cylinder, the maximum pressure is 15MPa, and the maximum range of the pressure reducing valve 2 is 1.4MPa. The cooling water jacket 16 is connected with the circulating cooling water, and the temperature of the circulating cooling water is controlled at 1±0.1°C. The temperature of the metering chamber 5 is room temperature 28°C, and the temperature of the temperature control instrument 34 is set at 40°C.

1 and 2, place the magnetic stirrer 29 and the 30% MEA solution in the gas-liquid reaction chamber 21 through the liquid inlet 22, seal the liquid inlet, place the gas-liquid reaction chamber 21 on the magnetic stirrer 30, Adjust the stirring acceleration knob 31 to make the magnetic stirrer 29 rotate evenly in the liquid, turn on the temperature control instrument 34, set the heating temperature to 40°C, turn on the upper computer 36 and the data acquisition and valve control circuit board 35, turn on the vacuum pump 13, and turn on the The vacuum solenoid valve 12 and the pressure equalizing solenoid valve 14 are used to evacuate the air circuit and the cavity. When the instantaneous pressure value is lower than 1Pa, the pressure equalizing solenoid valve 14 and the vacuum solenoid valve 12 are closed, and the gas cylinder 1 to be tested is opened. Open pressure reducing valve 2 and adjust to 1MPa. Open the air source solenoid valve 3, and fill the metering chamber 5 with 1.0 MPa of carbon dioxide. After the pressure change of the metering chamber pressure sensor 10 becomes stable, close the air source solenoid valve 3, and calculate the gas filling rate of carbon dioxide gas in the metering chamber 5 according to the gas state equation. number of moles. When the temperature measured by the liquid temperature measuring thermocouple 26 in the gas-liquid reaction chamber 21 reaches 40±0.1°C, the pressure equalizing solenoid valve 14 is opened, and when the pressure value measured by the pressure sensor 10 in the metering chamber is different from the pressure value measured by the pressure sensor 15 in the reaction chamber When the program setting requirements are met, the pressure equalizing solenoid valve 14 is closed. At this time, monitor the change value of the pressure of the pressure sensor 15 in the reaction chamber, and draw a curve against time until the change rate of the pressure value is less than 120 Pa/s, and the reaction ends. Calculate the vapor pressure of the liquid according to the temperature of 40°C measured by the gas temperature measuring thermocouple 24, and then calculate the molar amount of carbon dioxide entering the gas-liquid reaction chamber 21 according to the gas state equation and Dalton's law of partial pressure. Calculate the change rate of carbon dioxide gas partial pressure with time through the reaction pressure curve, and then calculate the chemical reaction rate through the volume of the gas-liquid reaction chamber 21, so as to give the rate equation of the reaction between carbon dioxide and 30% MEA solution.

Claims (4)

1. device based on volumetric determination gas-liquid chemical reaction rate is characterized in that this device is made up of air supply system, vacuum system, gas metering system, gas liquid reaction system, heating system, stirring system, cooling system and data acquisition system (DAS) eight parts;

Wherein said air supply system is made up of source of the gas gas cylinder to be measured (1), reduction valve (2), source of the gas solenoid valve (3) and source of the gas joint flange (4); Reduction valve (2) links to each other with source of the gas gas cylinder to be measured (1) by the high pressure sealing screw thread, source of the gas solenoid valve (3) links to each other with source of the gas joint flange (4) with reduction valve (2) by pipeline, and source of the gas joint flange (4) is used for being connected of air supply system and measurement chamber (5);

Described vacuum system is made up of vacuum joint flange (11), vacuum solenoid (12) and vacuum pump (13); Vacuum system is joined by vacuum joint flange (11) and measurement chamber (5), and vacuum pump (13), vacuum solenoid (12) and vacuum joint flange (11) link to each other by pipeline;

Described gas metering system is by measurement chamber (5), measurement chamber thermocouple sheath (6), measurement chamber thermopair (7), all press joint flange (8), measurement chamber pressure measurement joint flange (9) and measurement chamber pressure transducer (10) to form; Measurement chamber thermopair (7) places in the measurement chamber thermocouple sheath (6), measurement chamber thermocouple sheath (6) stretches in the measurement chamber (5), link together by welding technology and measurement chamber (5), measurement chamber pressure transducer (10) links to each other with measurement chamber (5) by measurement chamber pressure measurement joint flange (9), and measurement chamber (5) links to each other with equal pressure electromagnetic valve (14) by all pressing joint flange (8);

Described gas liquid reaction system is made up of equal pressure electromagnetic valve (14), reaction chamber pressure transducer (15), gas liquid reaction chamber (21), inlet (22), gas thermometric idol sleeve pipe (23), gas temperature thermocouple (24), liquid thermometric idol sleeve pipe (25) and liquid temperature thermocouple (26); Gas temperature thermocouple (24) places in the gas thermometric idol sleeve pipe (23), gas thermometric idol sleeve pipe (24) inserts top, gas liquid reaction chamber (21), link together by welding technology and gas liquid reaction chamber (21), liquid temperature thermocouple (26) places in the liquid thermometric idol sleeve pipe (25), liquid thermometric idol sleeve pipe (25) inserts bottom, gas liquid reaction chamber (21), but be higher than the magnetic stir bar height, link together by welding technology and gas liquid reaction chamber (21), inlet (22) is for having the pipeline of square nut, link together by welding technology with gas liquid reaction chamber (21), during work, by supporting bolt seal; Reaction chamber pressure transducer (15) is installed in Y shape cooling worm (19) top by screw thread, and Y shape cooling worm (19) internal diameter is between 4 ~ 7mm;

Described gas heating system is made up of heater strip (27), the equal backing of metal (28), temperature-control heat couple (32), heating cable (33) and temperature control instrument (34); Heater strip (27) passes through the insulating material uniform winding in the equal backing of metal (28) inside, link to each other with temperature control instrument (34) by heating cable (33), temperature-control heat couple (32) places the equal backing of metal (28) inside, closely contact with gas liquid reaction chamber (21), the equal backing of metal (28) is looped around periphery, gas liquid reaction chamber (21), its bottom coincide together by metal flanging technology, and the heat that the equal backing of metal (28) produces heater strip (27) is evenly distributed on the outer wall of gas liquid reaction chamber (21);

Described gas stirring system accelerates knob (31) by magnetic stir bar (29), magnetic stirring apparatus (30) and stirring and forms; Magnetic stir bar (29) is put into gas liquid reaction chamber (21) by inlet, and magnetic stir bar (29) is the magnetic material that is coated by wear-resisting organic material, carries out circular motion in the moving magnetic field of rotation; Magnetic stirring apparatus (30) produces the magnetic field of rotation, accelerates the frequency that knob (31) changes rotating magnetic field by regulating to stir, thereby changes the circular motion speed of magnetic stir bar (29);

Described cooling system is made up of cooling jacket (16), cooling jacket entrance (17), cooling jacket outlet (18), Y shape cooling worm (19) and coiled pipe joint flange (20); Y shape cooling worm (19) top is Y shape bifurcated, makes condensed fluid flow into gas liquid reaction chamber (21), and the bottom is coiled pipe or the spirality pipeline that spirals and rise, and links to each other with gas liquid reaction chamber (21) by coiled pipe joint flange (20) bottom; Y shape cooling worm (19) outer flow supercooling medium, heat eliminating medium enters from cooling jacket entrance (17), overflows from cooling jacket outlet (18); Y shape cooling worm (19) and cooling jacket (16) are by being welded together;

Described data acquisition system (DAS) is made up of data acquisition and valve controling circuit plate (35) and host computer (36); After being converted into digital signal, the voltage that data acquisition and valve controling circuit plate (35) import measurement chamber thermopair (7), gas temperature thermocouple (24), liquid temperature thermocouple (26), measurement chamber pressure transducer (10) and reaction chamber pressure transducer (15) into or current analog signal import host computer (36) into as computational data; When the satisfied setting of pressure condition requires, host computer (36) sends the digital switch instruction to data acquisition and valve controling circuit plate (35), data acquisition and valve controling circuit plate (35) are converted into voltage signal with digital signal, drive source of the gas solenoid valve (3), vacuum solenoid (12) or equal pressure electromagnetic valve (14) and open or closure, realize the automatic control of program;

Described measurement chamber thermocouple sheath (6), gas thermometric idol sleeve pipe (23) and liquid thermometric idol sleeve pipe (26) front end are through the processing attenuate, and its wall thickness is no more than 0.3 mm.

2. the device based on volumetric determination gas-liquid chemical reaction rate as claimed in claim 1 is characterized in that temperature-control heat couple can substitute with thermal resistance, thermistor temperature detecting components and parts.

3. the device based on volumetric determination gas-liquid chemical reaction rate as claimed in claim 1 is characterized in that the equal backing of metal adopts good red copper, aluminium or the stainless steel of heat conductivility.

4. the device based on volumetric determination gas-liquid chemical reaction rate as claimed in claim 1 is characterized in that substituting with thermal resistance, thermistor at measurement chamber thermopair, the warm galvanic couple of the gentle body examination of liquid temperature thermocouple.

Images