CN108414673B - System and method for measuring combustion characteristics of hydrogen in supercritical mixed working medium - Google Patents
System and method for measuring combustion characteristics of hydrogen in supercritical mixed working medium Download PDFInfo
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Abstract
System for measuring combustion characteristics of hydrogen in supercritical mixed working mediumThe method comprises a methanol tank, a first high-pressure constant flow pump, a tubular electric furnace, a high-pressure gas cylinder, a water tank, a feeder, a hydrogen peroxide decomposition section, a reaction section, a gas-liquid separator, a gas flowmeter and a gas chromatograph; wherein the high-pressure gas cylinder is connected with the feeder; the water tank is connected with the feeder; the feeder is also connected with a hydrogen peroxide decomposition section, the hydrogen peroxide decomposition section is connected with a reaction section, outlet pipelines are arranged on the reaction section at different lengths, and each pipeline is connected with the gas chromatograph through a gas-liquid separator and a gas flowmeter; the methanol tank is connected with a tubular electric furnace through a first high-pressure constant flow pump, and the tubular electric furnace is connected with one path of outlet pipeline on the reaction section. The invention can measure the supercritical H under high temperature and high pressure 2 O/CO 2 /H 2 The concentration of medium hydrogen and oxygen varies before and after different reaction times to obtain kinetic parameters of the reaction including activation energy and pre-finger factors.
Description
Technical Field
The invention relates to the field of experimental measurement of combustion characteristics, in particular to a system and a method for measuring the combustion characteristics of hydrogen in a supercritical mixed working medium.
Background
The traditional coal combustion utilization mode has the inherent defects of low energy utilization efficiency, serious pollution and the like, and brings about increasingly serious social and environmental problems, so that a clean and efficient novel coal utilization technology is more and more focused. At present, the novel coal hydrogen production and power generation theory and technology taking water phase environment gas as a core converts coal into high-purity H in a one-pot water coal steaming mode by utilizing unique physical and chemical properties of supercritical water 2 And CO 2 Realize zero emission of nitrogen oxides, sulfur oxides and solid particles from the source and CO 2 Is used for recycling. However, supercritical water gasification of coal is an endothermic reaction, and a large amount of heat is required to be absorbed during the reaction. The traditional electric heating mode needs to add extra energy input, and the complexity of the equipment is increased. Supercritical H after gasification 2 O/CO 2 /H 2 Introducing oxygen into the mixed working medium to make H 2 The slow combustion releases heat, and self-heating of the system can be realized. Thus, a supercritical H is obtained 2 O/CO 2 /H 2 The kinetic parameters of medium hydrogen combustion are of great significance for the application of this technology.
Disclosure of Invention
In order to achieve the technical aim, the invention provides a system and a method for measuring the combustion characteristics of hydrogen in a supercritical mixed working medium, which can measure the combustion rate of hydrogen in the supercritical mixed working medium under different conditions, further obtain the kinetic parameters of the reaction and provide theoretical guidance for the industrialized application of hydrogen combustion in the supercritical mixed working medium.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a measurement system for the combustion characteristics of hydrogen in a supercritical mixed working medium comprises a methanol tank, a tubular electric furnace, a high-pressure gas cylinder, a water tank, a feeder, a hydrogen peroxide decomposition section, a reaction section, a gas-liquid separator and a gas chromatograph; wherein the high-pressure gas cylinder is connected with the feeder; the water tank is connected with the feeder; the feeder is also connected with a hydrogen peroxide decomposition section, the hydrogen peroxide decomposition section is connected with a reaction section, outlet pipelines are arranged on the reaction section at different lengths, and each pipeline is connected with the gas chromatograph through a gas-liquid separator; the methanol tank is connected with an inlet pipeline on the reaction section.
The invention is further improved in that a charging bucket is arranged between the high-pressure gas cylinder and the feeder, the feeder comprises a sealing seat, a sealing head, a device body and a piston, the sealing seat is arranged at the top of the device body, the sealing head is arranged on the sealing seat, the piston capable of moving up and down is arranged in the device body, and the piston divides an internal cavity of the device body into an upper cavity and a lower cavity; the material tank links to each other with the lower cavity of charging means, and the water tank links to each other with the upper cavity of charging means.
The invention is further improved in that the water tank is connected with a second high-pressure constant-flow pump, and the second high-pressure constant-flow pump is connected with the feeder.
The invention is further improved in that the hydrogen peroxide decomposing section and the reaction section are both arranged in the sand bath furnace; and the hydrogen peroxide decomposing section and the reaction section are arranged in a double-layer linear arrangement, a double-layer inclined arrangement or a spiral arrangement in the sand bath furnace.
The invention is further improved in that a cooler and a ball valve are arranged on each outlet pipeline of the reaction section.
The invention is further improved in that the cooler is a sleeve-type cooler; the hydrogen peroxide decomposing section and the reaction section are made of 316 stainless steel, inconel 625 stainless steel or hastelloy C276 stainless steel.
The invention is further improved in that each pipeline is connected with a back pressure valve, and the back pressure valve is connected with a gas-liquid separator.
A measuring method adopts a high-pressure constant-flow pump to input a methanol solution into a tubular electric furnace, so that the methanol is gasified into CO in supercritical water 2 And H 2 Forming supercritical H 2 O/CO 2 /H 2 Mixing working media; a high-pressure gas cylinder is adopted to drive hydrogen peroxide solution in a charging bucket to enter a lower cavity of a feeder; the water in the water tank enters the upper cavity of the feeder under the action of the high-pressure constant-flow pump, and drives the piston to enable the hydrogen peroxide solution in the lower cavity to enter the hydrogen peroxide decomposition section, and the supercritical H is formed 2 O/CO 2 /H 2 The working medium and the oxygen of the hydrogen peroxide solution are mixed in the reaction section and react, and H is changed by changing the length of the reaction section under the same working condition 2 O/CO 2 /H 2 Residence time of working medium in the reaction section; h after reaction 2 O/CO 2 /H 2 The working medium is cooled to room temperature after passing through the sleeve cooler, the content of different components in the mixed working medium is measured by a gas chromatograph, and the kinetic parameters of the reaction are obtained by measuring the burning rate of hydrogen in the supercritical mixed working medium under different working conditions.
The invention is further improved in that the operating temperature of the tubular electric furnace is 600-700 ℃.
The invention is further improved in that the working temperature of the sand bath furnace is 400-600 ℃.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention utilizes supercritical water gasification of methanol to generate supercritical H 2 O/CO 2 /H 2 The gasification efficiency of the mixed working medium and the methanol can reach more than 98%, so that the interference of other gasification products on the hydrogen combustion is avoided;
(2) Supercritical H generation by pyrolysis of hydrogen peroxide 2 O/O 2 The decomposition rate of the mixed working medium can reach99% or more, and the concentration of oxygen can be changed by changing the concentration of hydrogen peroxide;
(3) Compared with the technology of directly introducing hydrogen and oxygen into a supercritical system by utilizing a high-pressure gas cylinder, the experimental system avoids the possibility of explosion caused by gas backflow into the high-pressure gas cylinder, greatly improves the safety of experiments, saves space and is easy to arrange;
(4) The residence time of the mixed working medium in the reaction section under the same working condition in the system is changed by changing the length of the reaction section, so that the influence of changing the flow velocity on the experimental result is avoided, and the experimental precision is improved.
In measurement, the invention utilizes supercritical water gasification of methanol to generate supercritical H 2 O/CO 2 /H 2 Mixed working medium, oxygen is generated by utilizing high-temperature decomposition of hydrogen peroxide solution, and supercritical H is generated 2 O/CO 2 /H 2 The working medium and oxygen are mixed in the reaction section and react, and the residence time of the mixed working medium in the reaction sections with different lengths is changed by changing the length of the reaction section under the same working condition. The reacted mixed working medium is cooled to room temperature after passing through a sleeve-type cooler, and the contents of different components in the mixed working medium are measured by a gas chromatograph, so that the combustion rate of hydrogen in the supercritical mixed working medium under different working conditions is obtained, and further the kinetic parameters of the reaction including the activation energy and the pre-finger factor are obtained.
Drawings
FIG. 1 is a supercritical H according to an embodiment of the present invention 2 O/CO 2 /H 2 Schematic structural diagram of experimental measurement system of combustion characteristics of medium hydrogen;
FIG. 2 is the supercritical H shown in FIG. 1 2 O/CO 2 /H 2 Schematic structural diagram of feeder in experimental measurement system of combustion characteristics of medium hydrogen.
In the figure, a 1-methanol tank; 2-a first high-pressure constant flow pump; 3-tube electric furnace; 4-a high-pressure gas cylinder; 5-charging bucket; 6-a water tank; 7-a feeder; 8-a hydrogen peroxide decomposition section; 9-a reaction section; 10-Sha Yulu; 11-a cooler; 12-ball valve; 13-a back pressure valve; 14-a gas-liquid separator; 15-a gas flow meter; 16-gas chromatograph; 17-a sealing seat; 18-end socket; 19-a device body; 20-a piston; the high-pressure constant flow pump comprises a first high-pressure constant flow pump body, a second high-pressure constant flow pump body, a first inlet pipeline body, a second inlet pipeline body, a first outlet pipeline body, a second outlet pipeline body, a third outlet pipeline body and a fourth outlet pipeline body.
Detailed Description
The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent. In the drawings or description, like or identical parts are provided with the same reference numerals. Implementations not shown or described in the drawings are forms known to those of ordinary skill in the art. Additionally, although examples of parameters including particular values may be provided herein, it should be appreciated that the parameters need not be exactly equal to the corresponding values, but may approximate the corresponding values within acceptable error margins or design constraints. Directional terms such as "upper", "lower", "front", "rear", "left", "right", etc. mentioned in the embodiments are merely directions referring to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is not intended to be limiting of the scope of the invention.
Referring to fig. 1, the measuring system of the present invention comprises a methanol tank 1, a first high-pressure constant flow pump 2, a tubular electric furnace 3, a high-pressure gas cylinder 4, a charging tank 5, a water tank 6, a feeder 7, a hydrogen peroxide decomposition section 8, a reaction section 9, a sand bath 10, a cooler 11, a ball valve 12, a back pressure valve 13, a gas-liquid separator 14, a gas flowmeter 15 and a gas chromatograph 16. The methanol tank 1, the first high-pressure constant flow pump 2 and the tubular electric furnace 3 form CO 2 /H 2 A mixed working medium supply part; the high-pressure gas cylinder 4, the charging bucket 5, the water tank 6, the first high-pressure constant flow pump 2 and the feeder 7 form an oxygen supply part; the data acquisition part comprises a thermocouple, a pressure gauge, a pressure sensor and a gas chromatograph 16, and is used for obtaining parameters such as pressure, temperature and the like and measuring the contents of different components in the mixed working medium before and after the reaction. Wherein, the high-pressure gas cylinder 4 is connected with the charging bucket 5, and the charging bucket 5 is connected with the feeder 7; the water tank 6 is connected with a second high-pressure constant-flow pump 21, and the second high-pressure constant-flow pump 21 is connected with the feeder 7. The feeder 7 is also connected with a hydrogen peroxide decomposing section 8,the hydrogen peroxide decomposing section 8 is connected with the reaction section 9 through a second inlet pipeline 23, and the hydrogen peroxide decomposing section 8 and the reaction section 9 are both arranged in the sand bath furnace 10; the reaction section 9 is provided with outlet pipes at different lengths, specifically, the reaction section 9 is divided into four sections, 4 outlet pipes, two inlets are respectively a first inlet pipe 22 and a second inlet pipe 23, and 4 outlet pipes are respectively a first outlet pipe 24, a second outlet pipe 25, a third outlet pipe 26 and a fourth outlet pipe 27. The reaction section 9 is used for providing different residence time for the reaction of hydrogen and oxygen in the mixed working medium.
And each path of outlet pipeline is provided with a cooler 11 and a ball valve 12, each path of pipeline is connected with a back pressure valve 13, and the back pressure valve 13 is connected with a gas chromatograph 16 through a gas-liquid separator 14 and a gas flowmeter 15. Specifically, the cooler 11 is a sleeve-type cooler, the inner tube is spiral, and the cooler 11 is a cooling device for cooling the reacted high-temperature mixed working medium to room temperature. The back pressure valve 13 is used to achieve and regulate the high pressure environment in the system. The gas-liquid separator 14 is a gas-liquid separation device for separating gas and liquid in the cooled mixture, the gas flowing out from the upper outlet, and the liquid flowing out from the lower outlet. The gas flow meter 15 is used to measure the total flow of the mixed gas after the reaction. The gas chromatograph 16 is a data acquisition device for measuring the content of different components in the mixed gas.
The methanol tank 1 is connected with a tubular electric furnace 3 through a first high-pressure constant flow pump 2, and the tubular electric furnace 3 is connected with a first inlet pipeline 22 on the reaction section 9. The tubular electric furnace 3 is used for generating a high-temperature environment to gasify the methanol into CO in supercritical water 2 And H 2 Forming supercritical H 2 O/CO 2 /H 2 And (5) mixing working media.
Specifically, the feeder 7 includes: the sealing device comprises a sealing seat 17, a sealing head 18, a device body 19 and a piston 20, wherein the sealing seat 17 is arranged at the top of the device body 19, the sealing head 18 is arranged on the sealing seat 17, the piston 20 capable of moving up and down is arranged in the device body 19, and the piston 20 divides an inner cavity of the device body 19 into an upper cavity and a lower cavity. The charging bucket 5 is connected with the lower cavity of the feeder 7, and the second high-pressure constant-flow pump 21 is connected with the upper cavity of the feeder 7.
The hydrogen peroxide decomposing section 8 provides sufficient residence time for the hydrogen peroxide solution to be completely decomposed at high temperature to form a homogeneous mixed working medium in which oxygen and supercritical water are mutually soluble.
The supercritical H of the invention 2 O/CO 2 /H 2 The experimental measurement system of combustion characteristics of medium hydrogen includes: CO 2 /H 2 A mixed working medium supply part, an oxygen supply part, a reaction section 9 and a data acquisition part. Wherein CO 2 /H 2 The mixed working medium supply part utilizes a first high-pressure constant-flow pump 2 to input a methanol solution into a tubular electric furnace 3, so that methanol is gasified into CO in supercritical water 2 And H 2 Forming supercritical H 2 O/CO 2 /H 2 And (5) mixing working media. Before the system works, the oxygen supply part drives hydrogen peroxide solution in the charging bucket 5 to enter the lower part of a piston of the feeder 7 by using the high-pressure gas cylinder 4; when the system works, water in the water tank 6 enters the upper part of a piston of the feeder 7 under the action of the first high-pressure constant-flow pump 2, and hydrogen peroxide solution at the lower part of the piston is driven to enter the hydrogen peroxide decomposition section 8, so that continuous and stable oxygen supply is provided for the system. Supercritical H 2 O/CO 2 /H 2 The working medium and oxygen are mixed in the reaction section 9 and react, and the residence time of the mixed working medium in the reaction section 9 is changed by changing the length of the reaction section 9 under the same working condition. The reacted mixed working medium is cooled to room temperature after passing through a sleeve-type cooler 11, and the content of different components in the mixed working medium is measured by a gas chromatograph 16, so that the burning rate of hydrogen in the supercritical mixed working medium under different working conditions is obtained, and further the kinetic parameters of the reaction are obtained.
The data acquisition part measures temperature values by using an armored thermocouple, pressure values by using a pressure gauge and a pressure sensor, and contents of different components in the mixed working medium by using a gas chromatograph 16. Wherein, the armored thermocouple measurement arrangement points are eight in total. The first measuring point is arranged at the outlet of the tubular electric furnace 3, the second measuring point is arranged before the supercritical water/carbon dioxide/hydrogen mixed working medium enters the reaction section 9, the third measuring point is arranged before the supercritical water/oxygen mixed working medium enters the reaction section 9, the fourth measuring point is arranged at the inlet of the reaction section 9, and the fifth, sixth, seventh and eighth measuring points are respectively arranged at the four outlets of the reaction section 9. There are two pressure gauge measurement arrangement points, the first one is arranged at the outlet of the first high-pressure constant flow pump 2, and the second one is arranged at the outlet of the second high-pressure constant flow pump 21. The pressure sensor is arranged in front of the back pressure valve 13, i.e. at the inlet of the back pressure valve 13.
In the invention, supercritical H generated by gasifying supercritical water of methanol 2 O/CO 2 /H 2 Oxygen generated by high-temperature decomposition of the mixed working medium and the hydrogen peroxide solution is simultaneously input into the reaction section 9, the residence time of the working medium is changed by changing the length of the reaction section, the content of different components in the mixed gas after reaction is measured, and the reaction rate of hydrogen combustion under different working conditions is obtained, so that the kinetic parameters of the reaction can be obtained.
In an exemplary embodiment of the present invention, a supercritical H is provided 2 O/CO 2 /H 2 An experimental measurement system for combustion characteristics of medium hydrogen. FIG. 1 is a supercritical H according to an embodiment of the present invention 2 O/CO 2 /H 2 Schematic structural diagram of experimental measurement system of combustion characteristics of medium hydrogen. As shown in fig. 1, the experimental measurement system of the present embodiment includes: the device comprises a methanol tank 1, a high-pressure constant flow pump 2, a tubular electric furnace 3, a high-pressure gas cylinder 4, a charging bucket 5, a water tank 6, a feeder 7, a hydrogen peroxide decomposition section 8, a reaction section 9, a sand bath furnace 10, a cooler 11, a ball valve 12, a back pressure valve 13, a gas-liquid separator 14, a gas flowmeter 15 and a gas chromatograph 16.
Wherein, the tubular electric furnace 3 utilizes a high-temperature and high-pressure environment to gasify methanol into CO in supercritical water 2 And H 2 Forming supercritical H 2 O/CO 2 /H 2 And (5) mixing working media.
The hydrogen peroxide decomposing section 8 utilizes the complete decomposition of hydrogen peroxide under the high temperature condition to form homogeneous mixed working medium of oxygen and supercritical water, which is supercritical H 2 O/CO 2 /H 2 The combustion of the medium hydrogen provides oxygen.
FIG. 2 is the supercritical H shown in FIG. 1 2 O/CO 2 /H 2 Schematic of the structure of the feeder 7 in an experimental measurement system of the combustion characteristics of medium hydrogen. As shown in FIG. 2, the feeder 7 is packagedThe method comprises the following steps: a sealing seat 17, a sealing head 18, a device body 19 and a piston 20. Before the system works, the high-pressure gas cylinder 4 drives the hydrogen peroxide solution in the charging bucket 5 to enter the lower cavity of the piston 20 of the feeder 7 so as to be filled with the hydrogen peroxide solution; when the system works, water in the water tank 6 enters the upper cavity of the piston 20 of the feeder 7 under the action of the high-pressure constant-flow pump 2, the piston 20 is driven to move downwards, and hydrogen peroxide solution in the lower cavity of the piston 20 enters the hydrogen peroxide decomposition section 8, so that continuous and stable oxygen supply is provided for the system.
The high-pressure constant-flow pump 2 is used for conveying a methanol solution with constant flow rate into the tubular electric furnace 3 under the high-pressure condition; and the device is also used for conveying water with constant flow rate to the upper cavity of the piston in the feeder 7 under the high pressure condition, so as to drive the hydrogen peroxide solution in the lower cavity of the piston to enter the hydrogen peroxide decomposition section 8.
Before the system works, the high-pressure gas cylinder 4 drives hydrogen peroxide solution in the charging bucket 5 to enter the lower part of the piston of the feeder 7; when the system works, water in the water tank 6 enters the upper part of a piston of the feeder 7 under the action of the high-pressure constant-flow pump 2, and hydrogen peroxide solution in a cavity below the piston is driven to enter the hydrogen peroxide decomposition section 8, so that continuous and stable oxygen supply is provided for the system.
The measuring method based on the system of the invention is that on one hand, a high-pressure constant-flow pump 2 is utilized to input the methanol solution into a tubular electric furnace 3, so that the methanol is gasified into CO in supercritical water 2 And H 2 Forming supercritical H 2 O/CO 2 /H 2 And (5) mixing working media. On the other hand, water in the water tank 6 is input into the upper cavity of the piston 20 of the feeder 7 by the high-pressure constant-flow pump 2, and the hydrogen peroxide solution in the lower cavity of the piston 20 is driven to enter the hydrogen peroxide decomposition section 8, so that continuous and stable oxygen supply is provided for the system. Supercritical H 2 O/CO 2 /H 2 The working medium and oxygen are fully mixed in the reaction section 9 and react, and the residence time of the mixed working medium in the reaction section is changed by changing the length of the reaction section 9 under the same working condition. The reacted mixed working medium is cooled to room temperature after passing through a sleeve cooler 11, then gas phase and liquid phase are separated after passing through a gas-liquid separator 14, and the content of different components in the gas mixed working medium is measured by a gas chromatograph 16, so that different working mediums are obtainedUnder the condition, the burning rate of hydrogen in the supercritical mixed working medium is increased, so that the kinetic parameters of the reaction are obtained.
Although supercritical water gasification of methanol is used to generate supercritical H in the present embodiment 2 O/CO 2 /H 2 The working medium is mixed, but the invention is not limited thereto. For example: generating supercritical H 2 O/CO 2 /H 2 The mixed working medium can also be realized by supercritical water gasification of glycerol.
The hydrogen peroxide decomposing section 8 and the reaction section 9 can be arranged in a double-layer linear manner in the sand bath furnace 10, and can also be arranged in a double-layer inclined or spiral manner so as to improve the space utilization rate. The sand bath furnace 10 is used for providing heat for the hydrogen peroxide decomposition section 8 and the reaction section 9 to reach a required temperature value.
The hydrogen peroxide decomposition section 8 and the reaction section 9 are required to have high strength under high temperature and high pressure conditions, only a few materials meeting the requirements are given here, and the pipe is selected from one of the following materials by way of example: 316 stainless steel, inconel 625 stainless steel or hastelloy C276 stainless steel.
Supercritical H of this example 2 O/CO 2 /H 2 The operating temperature of the tubular electric furnace 3 in the experimental measurement system of the combustion characteristics of medium hydrogen is 600-700 ℃, the operating temperature of the sand bath furnace 10 is 400-600 ℃, and the operating pressure of the whole system including each pipeline is 23-30 MPa.
From the above description, the person skilled in the art shall be able to carry out the supercritical H of the invention 2 O/CO 2 /H 2 Experimental measurement systems for the combustion characteristics of medium hydrogen are well known.
Furthermore, the above definitions of the elements and methods are not limited to the specific structures, shapes or modes mentioned in the embodiments, and may be simply modified or replaced by those of ordinary skill in the art.
The invention utilizes supercritical water gasification of methanol to generate supercritical H 2 O/CO 2 /H 2 Mixing working medium, generating oxygen by high temperature decomposition of hydrogen peroxide solution, inputting the two into reaction section at the same time, and changing the reactionThe residence time of the working medium is changed according to the length of the reaction section, the content of different components in the mixed gas after reaction is measured by utilizing a gas chromatograph, and the reaction rate of hydrogen combustion under different working conditions is obtained, so that the reaction kinetic parameters of hydrogen combustion in the supercritical mixed working medium can be obtained, and the method has extremely high scientific research application value.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (9)
1. The system for measuring the combustion characteristics of hydrogen in the supercritical mixed working medium is characterized by comprising a methanol box (1), a high-pressure gas cylinder (4), a water tank (6), a feeder (7), a hydrogen peroxide decomposition section (8), a reaction section (9), a gas-liquid separator (14) and a gas chromatograph (16); wherein, the high-pressure gas cylinder (4) is connected with the feeder (7), and a charging bucket (5) is arranged between the high-pressure gas cylinder (4) and the feeder (7); the water tank (6) is connected with the feeder (7); the feeder (7) is also connected with the hydrogen peroxide decomposing section (8), the hydrogen peroxide decomposing section (8) is connected with the reaction section (9), outlet pipelines are arranged on the reaction section (9) at different lengths, and each pipeline is connected with the gas chromatograph (16) through the gas-liquid separator (14); the methanol tank (1) is connected with the high-pressure constant-flow pump (2), the high-pressure constant-flow pump (2) is connected with the tubular electric furnace (3), and the tubular electric furnace (3) is connected with an inlet pipeline on the reaction section (9); the high-pressure constant flow pump (2) inputs the methanol solution into the tubular electric furnace (3) to gasify the methanol into CO in the supercritical water 2 And H 2 Forming supercritical H 2 O/CO 2 /H 2 Mixing working media;
the feeder (7) comprises a sealing seat (17), an end socket (18), a device body (19) and a piston (20), wherein the sealing seat (17) is arranged at the top of the device body (19), the end socket (18) is arranged on the sealing seat (17), the piston (20) capable of moving up and down is arranged in the device body (19), and the piston (20) divides an inner cavity of the device body (19) into an upper cavity and a lower cavity; the charging bucket (5) is connected with the lower cavity of the feeder (7), and the water tank (6) is connected with the upper cavity of the feeder (7);
the hydrogen peroxide decomposing section (8) and the reaction section (9) are both arranged in the sand bath furnace (10); the working temperature of the tubular electric furnace (3) is 600-700 ℃, and the working temperature of the Sha Yulu (10) is 400-600 ℃.
2. The system for measuring the combustion characteristics of hydrogen in a supercritical mixed working medium according to claim 1, wherein the water tank (6) is connected with a second high-pressure constant-flow pump (21), and the second high-pressure constant-flow pump (21) is connected with the feeder (7).
3. The system for measuring the combustion characteristics of hydrogen in a supercritical mixed working medium according to claim 1, wherein the hydrogen peroxide decomposing section (8) and the reaction section (9) are arranged in a double-layer linear arrangement, a double-layer inclined arrangement or a spiral arrangement in Sha Yulu (10).
4. The system for measuring the combustion characteristics of hydrogen in a supercritical mixed working medium according to claim 1, wherein a cooler (11) and a ball valve (12) are arranged on each outlet pipeline of the reaction section (9).
5. The measurement system of the combustion characteristics of hydrogen in a supercritical mixed working medium according to claim 1, wherein the cooler (11) is a sleeve-type cooler; the hydrogen peroxide decomposing section (8) and the reaction section (9) are made of 316 stainless steel, inconel 625 stainless steel or hastelloy C276 stainless steel.
6. The system for measuring the combustion characteristics of hydrogen in a supercritical mixed working medium according to claim 1, wherein each pipeline is connected with a back pressure valve (13), and the back pressure valve (13) is connected with a gas-liquid separator (14).
7. A method of measuring a system as claimed in claim 1, characterized in that the methanol solution is fed into a tubular electric furnace (3) by means of a high-pressure constant-flow pump (2) for gasifying methanol into CO in supercritical water 2 And H 2 Forming supercritical H 2 O/CO 2 /H 2 Mixing working media; a high-pressure gas cylinder (4) is adopted to drive hydrogen peroxide solution in a charging bucket (5) to enter a lower cavity of a feeder (7); the water in the water tank (6) enters the upper cavity of the feeder (7) under the action of the high-pressure constant-flow pump (2), and drives the piston to enable the hydrogen peroxide solution in the lower cavity to enter the hydrogen peroxide decomposition section (8), and the supercritical H is formed 2 O/CO 2 /H 2 The working medium and the oxygen of the hydrogen peroxide solution are mixed and react in the reaction section (9), and H is changed by changing the length of the reaction section (9) under the same working condition 2 O/CO 2 /H 2 Residence time of working medium in the reaction section; h after reaction 2 O/CO 2 /H 2 The working medium is cooled to room temperature after passing through a sleeve-type cooler (11), the content of different components in the mixed working medium is measured by a gas chromatograph (16), and the kinetic parameters of the reaction are obtained by measuring the burning rate of hydrogen in the supercritical mixed working medium under different working conditions.
8. A measuring method according to claim 7, characterized in that the operating temperature of the tube furnace (3) is 600-700 ℃.
9. The method according to claim 7, wherein the operating temperature of Sha Yulu (10) is 400-600 ℃.
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