Reactor for testing performance of methanol reforming catalyst

Abstract

The utility model relates to a reactor for testing the performance of a methanol reforming catalyst, which comprises a reactor shell, a methanol steam inlet is arranged at the head end of the reactor shell, a reforming gas outlet is arranged at the tail end of the reactor shell, and a plurality of heating devices are sleeved outside the reactor shell side by side. A temperature sensor for monitoring the temperature of different positions in the methanol reactor tube is arranged between every two adjacent heating devices, and a plurality of reforming catalysts with the length matched with that of the heating devices are arranged in the reactor shell. According to the utility model, different section positions of the reforming reactor are heated to different temperatures through the heating devices which are arranged in a sectional manner, and the temperature state is fed back in real time through the temperature sensors at the front end and the rear end of each section position, so that high-precision temperature control in the reforming reactor is realized. On the basis, reforming catalysts with different lengths, different types and different reaction temperature intervals can be arranged, and the quality of hydrogen in reformed gas discharged from the tail end is detected.

Description

Technical Field

[0001] The utility model belongs to the technical field of methanol reforming reactors, in particular to a reactor used for testing the performance of methanol reforming catalysts. Background Art

[0002] A methanol reformer is a device used in chemical engineering, especially in the field of fuel cell technology, that produces hydrogen for hydrogen fuel cells by reacting a mixture of methanol and water (steam). The methanol is converted into hydrogen and carbon dioxide by the combined action of pressure, heat and catalysts, and high-purity hydrogen can then be extracted by methods such as pressure swing adsorption (PSA) or separation membranes.

[0003] Conventional reactors used to test catalyst performance are integrated, and the temperature inside the tube can only be measured from the head and tail ends; when equipped with an evaporator, the fluid temperature in the reactor is overly dependent on the performance of the evaporator, and the optimal reaction temperature range of different types of methanol reforming catalysts is widely distributed in the large range of 200-550°C, so it is difficult to take into account the impact of changes in test gas flow, catalyst filling amount and reforming catalyst type on hydrogen production capacity; in addition, the tube body of the reforming reactor is relatively long, and there is an inevitable temperature difference between each section, resulting in changes in the reaction rate during fluid flow. It is difficult to feedback the most realistic performance of the catalyst by only monitoring the temperature from the head end, tail end or outside the reaction tube. Therefore, there is an urgent need for a device to determine the impact of the specific temperature of each point in the reforming reaction tube on the catalyst and hydrogen production efficiency. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a methanol reactor to provide required data for testing the performance of a methanol reforming catalyst.

[0005] The utility model solves the technical problem by adopting the following technical solution: providing a reactor for testing the performance of a methanol reforming catalyst, comprising a reactor shell with a methanol water vapor inlet at the head end and a reforming gas outlet at the tail end, a plurality of heating devices being arranged side by side outside the reactor shell, temperature sensors for monitoring the temperatures at different positions in a methanol reactor tube being arranged between adjacent heating devices, and a plurality of reforming catalysts having lengths matching the lengths of the heating devices being arranged inside the reactor shell.

[0006] Preferably, sensor installation tubes communicating with the interior of the reactor shell are provided at equal intervals on the surface of the reactor shell, and the aperture of the sensor installation tubes matches the outer diameter of the temperature sensor probe.

[0007] The sensor installation tube is arranged at the center of a convex tube protruding from the surface of the reactor shell, and the temperature sensor is connected to the sensor installation tube through a connecting joint.

[0008] Preferably, the reforming catalyst may be in the form of a cylinder or a sphere.

[0009] Preferably, the heating device is an electric heating ring.

[0010] Preferably, the head end of the reactor shell is provided with an inlet end cover, and the tail end is provided with an outlet end cover, and the outlet end cover is connected to the reactor shell via a flange provided with a sealing gasket. Beneficial Effects

[0011] The utility model heats different sections of the reforming reactor to different temperatures through a segmented arrangement of heating devices, and feeds back the temperature status in real time through the temperature sensors at the front and rear ends of each section, thereby realizing high-precision temperature control in the reforming reactor tube. On this basis, reforming catalysts of different lengths and types can be arranged in the reforming reaction tube, and the quality of hydrogen in the reforming gas discharged from the tail end can be detected. The specific detection items include gas-liquid chromatography component detection, flow detection, conductivity and PH detection, etc., to test the temperature, pipeline length and the production quality of the reforming gas under different heating conditions, and obtain the most suitable production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the three-dimensional structure of a reactor used to test the performance of methanol reforming catalyst.

[0013] Figure 2 It is a schematic cross-sectional view of a reactor used to test the performance of a methanol reforming catalyst.

[0014] Figure 3 An exploded diagram of a reactor used to test the performance of methanol reforming catalysts.

[0015] Among them, 1-fixed end; 2-sealing gasket; 3-electric heating ring; 4-temperature sensor; 5-reforming catalyst; 6-outlet end cover; 7-reactor shell; 8-methanol water vapor inlet; 9-reforming gas outlet; 10-sensor installation pipe; 11-connecting joint; 12-insulating thermal shell; 13-clamp; 14-flange.

[0016] The same reference numerals in the various drawings represent the same components. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0018] like Figure 1 , 2 As shown, the utility model provides a reactor for testing the performance of a methanol reforming catalyst, comprising a reactor shell 7 with a methanol water vapor inlet 8 at the head end and a reforming gas outlet 9 at the tail end, a plurality of heating devices are arranged side by side on the outside of the reactor shell 7, temperature sensors 4 for monitoring the temperature at different positions in a methanol reactor tube are arranged between adjacent heating devices, and a plurality of reforming catalysts 5 with a length matching the length of the heating devices are arranged in the reactor shell 7.

[0019] In a specific embodiment, the surface of the reactor shell 7 is provided with sensor installation tubes 10 communicating with the interior of the reactor shell 7 at equal intervals, and the aperture of the sensor installation tubes 10 matches the outer diameter of the probe of the temperature sensor 4. The temperature sensor 4 can be fixed on the surface of the reactor shell 7, and then its probe is inserted into the reactor tube to monitor the temperature at different positions in the tube.

[0020] In a specific embodiment, the temperature sensor 4 is connected to the sensor mounting tube 10 through a connecting joint 11. The connecting joint 11 is made of 316 stainless steel and is connected to the temperature sensor 4 through a pipe thread to achieve a sealing effect. The sensor mounting tube 10 and the connecting joint 11 are connected through a ferrule to prevent the internal high-temperature methanol vapor from overflowing from the reactor.

[0021] The reforming catalyst 5 can be in the form of a cylinder or a sphere, and can test commonly used reforming catalysts such as Pt-In methanol reforming precious metal catalysts or other types of reforming catalysts according to the test objectives. In the test, different numbers of reforming catalysts 5 can be set according to the length of the reforming reactor to be tested to simulate the effect of the pipeline length on the catalyst.

[0022] The heating device is an electric heating ring 3, and the temperature of the electric heating ring 3 at different positions can be changed by adjusting the power supply duration of the electric heating ring 3, replacing the uncontrollable hot flue gas flow channel, facilitating the testing of the performance of the reforming catalyst in different temperature ranges, or simulating different temperature conditions of the reforming reactor, or testing the influence of extreme temperature on the catalyst. In a specific embodiment, the electric heating ring 3 is covered with a heat-insulating shell 12 to reduce heat loss and power consumption.

[0023] The tail end of the reactor shell 7 is provided with an outlet end cover 6. The middle part of the inlet end cover 1 is provided with the methanol water vapor inlet 8, which is connected to the methanol water vapor storage tank or the evaporation side of the evaporator; the middle part of the outlet end cover 6 is provided with the reformed gas outlet 9, which is connected to the gas storage tank. The tail end of the reactor shell 7 and the outlet end cover 6 are provided with matching flanges 14, and the flange 14 is provided with a clamp 13 for connection, so that the outlet end cover 6 can be disassembled when necessary to replace the reforming catalyst 5 located in the tube.

Claims

1. A reactor for testing the performance of a methanol reforming catalyst, comprising a reactor shell (7) having a methanol water vapor inlet (8) at the head end and a reforming gas outlet (9) at the tail end, characterized in that: A plurality of heating devices are arranged side by side outside the reactor shell (7), and temperature sensors (4) for monitoring the temperature at different positions in the methanol reactor tube are arranged between adjacent heating devices. A plurality of reforming catalysts (5) having a length matching that of the heating devices are arranged inside the reactor shell (7).

2. A reactor for testing the performance of a methanol reforming catalyst according to claim 1, characterized in that: Sensor mounting tubes (10) communicating with the interior of the reactor shell (7) are provided at equal intervals on the surface of the reactor shell (7); the aperture of the sensor mounting tube (10) matches the outer diameter of the probe of the temperature sensor (4).

3. A reactor for testing the performance of a methanol reforming catalyst according to claim 2, characterized in that: The sensor installation tube (10) is arranged at the center of a protruding tube protruding from the surface of the reactor shell (7), and the temperature sensor (4) is connected to the sensor installation tube (10) via a connecting joint (11).

4. The reactor for testing the performance of a methanol reforming catalyst according to claim 1, characterized in that: The reforming catalyst (5) may be in the form of a cylinder or a sphere.

5. The reactor for testing the performance of methanol reforming catalyst according to claim 1, characterized in that: The heating device is an electric heating ring (3).

6. The reactor for testing the performance of methanol reforming catalyst according to claim 1, characterized in that: The head end of the reactor shell (7) is provided with an inlet end cover (1), and the tail end is provided with an outlet end cover (6), and the outlet end cover (6) and the reactor shell (7) are connected via a flange provided with a sealing gasket (2).

Images