A pilot test platform for catalytic oxidation of carbon monoxide in industrial flue gas

Abstract

The utility model discloses a kind of for industrial flue gas carbon monoxide catalytic oxidation pilot test platform, including the pry seat of frame structure, pry seat is connected with flue gas inlet pipe, flue gas inlet pipe is communicated flue gas heater;Flue gas inlet pipe is sequentially provided with flue gas inlet valve, flue gas inlet detection device;The flue gas second temperature measuring instrument is set on the outlet pipe of flue gas heater, another end is communicated reactor, and one carbon monoxide catalyst is equipped in reactor;The outlet of reactor is communicated flue gas outlet pipe, and induced draft fan, flue gas outlet valve are set on flue gas outlet pipe;Reactor sets inlet temperature detector, outlet temperature detector, differential pressure instrument.The utility model has the advantages of convenient to use, high degree of adaptation, high degree of automation, different temperature, different carbon monoxide concentration conditions under pilot test research can be carried out, to filter out suitable catalyst design and system operating condition for carbon monoxide processing in industrial flue gas.

Description

Technical Field

[0001] This utility model relates to the field of industrial flue gas treatment technology, and more specifically to a pilot-scale experimental platform for the catalytic oxidation of carbon monoxide in industrial flue gas. Background Technology

[0002] my country has long been the world's largest steel producer, resulting in a huge demand for fossil fuels. The incomplete combustion of fossil fuels produces large amounts of CO. If CO is emitted without proper control, it will not only pose a significant threat to the environment and human health, but also represent a serious waste of energy for steel mills by directly releasing CO into the atmosphere.

[0003] The carbon monoxide (CO) catalytic oxidation process is an effective end-of-pipe treatment measure for removing carbon monoxide from industrial flue gas. Its reaction mechanism is as follows: under the action of a carbon monoxide catalyst, carbon monoxide is oxidized into carbon dioxide and a certain amount of heat is released.

[0004] Because there are few actual projects implementing the catalytic oxidation of carbon monoxide in industrial flue gas, it is difficult for researchers to conduct industrial-scale testing and verification of catalyst performance and process operating conditions. Therefore, a pilot-scale experimental platform for the catalytic oxidation of carbon monoxide in industrial flue gas is needed to enable research on this project at a lower R&D cost, facilitating subsequent technology transfer. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a pilot-scale test platform for the catalytic oxidation of carbon monoxide in industrial flue gas, so as to solve the problems in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0007] A pilot-scale test platform for the catalytic oxidation of carbon monoxide in industrial flue gas includes a frame-structured skid. A flue gas inlet pipe, connected to an industrial flue gas pipeline, is mounted on the skid via a support. The other end of the flue gas inlet pipe is connected to a flue gas heater. A flue gas inlet valve and a flue gas inlet detection device are sequentially arranged along the inlet direction on the flue gas inlet pipe. A second flue gas temperature measuring instrument is installed on the flue gas outlet pipe of the flue gas heater. The other end of the outlet pipe is connected to a reactor containing a carbon monoxide catalyst. The reactor outlet is connected to a flue gas outlet pipe, on which are sequentially arranged... An induced draft fan is used to ensure smooth smoke output, and a flue gas outlet valve is used to control the smoke output speed. An inlet temperature detector is installed at the reactor inlet, an outlet temperature detector is installed at the reactor outlet, and a differential pressure gauge is installed on the reactor. The output terminals of the flue gas inlet detection device, the second flue gas temperature measuring instrument, the inlet temperature detector, the outlet temperature detector, and the differential pressure gauge are connected to a control cabinet mounted on a skid via a bracket. The input terminals of the flue gas heater, the reactor, the induced draft fan, the flue gas outlet valve, and the flue gas inlet valve are connected to the control cabinet, and the control cabinet is connected to an electrical cabinet mounted on the skid.

[0008] To further optimize the technical solution, an air intake pipe for adjusting the carbon monoxide concentration is connected to the flue gas intake pipe. An air intake valve and an air heater are sequentially arranged on the air intake pipe along the air intake direction, and the controlled ends of the air intake valve and the air heater are connected to the control cabinet.

[0009] To further optimize the technical solution, a first detection hole is provided on the flue gas inlet pipe and downstream of the air inlet pipe.

[0010] To further optimize the technical solution, a heat tracing and insulation layer is provided on the flue gas inlet pipe, and insulation layers are provided on both the air inlet pipe and the flue gas heater outlet pipe. An anti-scalding insulation layer is provided on the flue gas outlet pipe.

[0011] To further optimize the technical solution, the flue gas inlet detection device includes a pressure measuring instrument, a flow measuring instrument, and a first flue gas temperature measuring instrument, and the output terminals of the pressure measuring instrument, the flow measuring instrument, and the first flue gas temperature measuring instrument are connected to the control cabinet.

[0012] To further optimize the technical solution, a second detection hole is provided between the reactor and the induced draft fan on the flue gas outlet pipe.

[0013] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.

[0014] This invention provides a pilot-scale experimental platform for the catalytic oxidation of carbon monoxide in industrial flue gas. It adopts a skid-mounted modular design, offering advantages such as convenient installation and high system operability. A heater is installed to heat the flue gas, allowing for testing of carbon monoxide catalyst performance and system operating conditions under different temperature conditions. The heater and valves are interlocked with instruments via a control cabinet, achieving automated control. An air inlet pipe allows for mixing air with the original flue gas to alter the carbon monoxide concentration, facilitating testing of the carbon monoxide catalyst performance at different concentrations. This invention offers advantages such as ease of use, high adaptability, and high automation, enabling pilot-scale experimental studies under different temperatures and carbon monoxide concentrations to screen suitable catalyst designs and system operating conditions for carbon monoxide treatment in industrial flue gas. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram of the rear angle of this utility model; Figure 3 This is the left view of the present invention; Figure 4 This is a process flow diagram of the present invention.

[0016] The components include: 1. Flue gas inlet pipe, 2. Flue gas outlet pipe, 3. Air inlet pipe, 4. Flue gas heater, 5. Reactor, 6. Exhaust fan, 7. Air heater, 8. Flue gas inlet valve, 9. Flue gas outlet valve, 10. Air inlet valve, 111. Pressure measuring instrument, 112. Flow measuring instrument, 113. First flue gas temperature measuring instrument, 12. Second flue gas temperature measuring instrument, 13. Inlet temperature detector, 14. Differential pressure gauge, 15. Outlet temperature detector, 16. Carbon monoxide catalyst, 17. Skid, 18. First detection hole, 19. Second detection hole, 20. Control cabinet, 21. Electrical cabinet. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] A pilot-scale experimental platform for the catalytic oxidation of carbon monoxide in industrial flue gas, combined with Figures 1 to 4As shown, the system includes a flue gas inlet pipe 1, a flue gas outlet pipe 2, an air inlet pipe 3, a flue gas heater 4, a reactor 5, an induced draft fan 6, an air heater 7, a flue gas inlet valve 8, a flue gas outlet valve 9, an air inlet valve 10, a second flue gas temperature measuring instrument 12, an inlet temperature detector 13, a differential pressure gauge 14, an outlet temperature detector 15, a carbon monoxide catalyst 16, a skid 17, a first detection port 18, a second detection port 19, a control cabinet 20, and an electrical cabinet 21. The flue gas inlet detection device includes a pressure measuring instrument 111, a flow measuring instrument 112, and a first flue gas temperature measuring instrument 113.

[0019] Skid 17 is a frame structure that integrates equipment, pipelines, instruments, and control systems onto the skid 17 (steel chassis), featuring overall mobility and rapid deployment.

[0020] The skid 17 is connected to a flue gas inlet pipe 1 via a bracket, which is connected to an industrial flue gas pipeline. This pipe is used to introduce carbon monoxide gas into this pilot test. The other end of the flue gas inlet pipe 1 is connected to a flue gas heater 4.

[0021] A flue gas inlet valve 8 and a flue gas inlet detection device are sequentially installed along the inlet direction on the flue gas inlet pipe 1 to accurately measure the parameters of the flue gas entering the flue gas heater 4. The flue gas inlet detection device includes a pressure measuring instrument 111, a flow measuring instrument 112, and a first flue gas temperature measuring instrument 113, and the outputs of the pressure measuring instrument 111, the flow measuring instrument 112, and the first flue gas temperature measuring instrument 113 are connected to the control cabinet.

[0022] A second flue gas temperature measuring instrument 12 is installed on the flue gas heater 4 to accurately control the temperature of the flue gas heating and to be interlocked with the flue gas electric heater. The power and start / stop of the flue gas electric heater are adjusted according to the set value of the outlet temperature.

[0023] The other end of the flue gas outlet pipe is connected to reactor 5. Reactor 5 contains a carbon monoxide catalyst 16, which is horizontally positioned in the middle of reactor 5 so that the flue gas can pass vertically through it. An inlet temperature detector 13 and an outlet temperature detector 15 are installed at the inlet and outlet of reactor 5, respectively, to compare the temperature changes before and after reactor 5 and calculate the exothermic reaction under the action of the carbon monoxide catalyst 16. Differential pressure gauges 14 are installed on the upper wall of reactor 5 before and after the carbon monoxide catalyst 16 to measure the pressure loss under the action of the catalyst.

[0024] The outlet of reactor 5 is connected to flue gas outlet pipe 2. A draft fan 6 and a flue gas outlet valve 9 are installed sequentially on the flue gas outlet pipe 2. The draft fan 6 is used to ensure the smooth flow of flue gas, and the flue gas outlet valve 9 is used to control the speed of flue gas discharge.

[0025] A second detection hole 19 is provided between the reactor 5 and the induced draft fan 6 on the flue gas outlet pipe 2. A flange cover is provided on the second detection hole 19. When using a flue gas analyzer to detect carbon monoxide concentration, the flange cover is first removed, and then the sampling gun of the flue gas analyzer is inserted into the center of the flue gas outlet pipe 2 to sample and obtain the test value c2.

[0026] The outputs of the flue gas inlet detection device, the second flue gas temperature measuring instrument 12, the inlet temperature measuring instrument 13, the outlet temperature measuring instrument 15, and the differential pressure gauge 14 are connected to a control cabinet mounted on a skid 17 via a bracket. The inputs of the flue gas heater 4, the reactor 5, the induced draft fan 6, the flue gas outlet valve 9, and the flue gas inlet valve 8 are connected to the control cabinet. A touch screen is installed on the control cabinet, displaying the detected temperature and pressure values ​​in real time. The heating temperatures of the air heater and the temperature heater can be set via the touch screen.

[0027] The control cabinet is connected to the electrical cabinet mounted on the skid 17, which provides power to the entire platform.

[0028] An air inlet pipe 3 is connected to the flue gas inlet pipe 1. The connection point of the air inlet pipe 3 is located between the flue gas inlet valve 8 and the flue gas inlet detection device. An air inlet valve 10 and an air heater 7 are sequentially installed on the air inlet pipe 3 along the air inlet direction, and the controlled ends of the air inlet valve 10 and the air heater 7 are connected to the control cabinet. After the air in the air inlet pipe 3 is heated to the set temperature by the air heater 7, it is mixed with the original flue gas in a certain proportion to obtain carbon monoxide of a set concentration, and then enters the reactor 5 for pilot-scale testing.

[0029] A first detection hole 18 is provided on the flue gas inlet pipe 1 and downstream of the air inlet pipe 3. A flange cover is provided on the first detection hole 18. When using a flue gas analyzer to detect carbon monoxide concentration, the flange cover is first removed, and then the sampling gun of the flue gas analyzer is inserted into the center of the flue gas inlet pipe 1 to sample and test to obtain the test value c1.

[0030] A heat tracing and insulation layer is installed on the flue gas inlet pipe 1 to achieve active heating and insulation of the flue gas inlet pipe 1. Insulation layers are also installed on the air inlet pipe 3 and the flue gas heater 4's outlet pipe to prevent heat loss. An anti-scalding insulation layer is installed on the flue gas outlet pipe 2, which, while maintaining heat, reduces the surface temperature of the flue gas outlet pipe 2 to a suitable range, effectively preventing accidental burns to operators and also lowering the ambient temperature.

[0031] In practical use, the flue gas used in the pilot test enters the pilot test platform through the flue gas inlet pipe 1, and the pre-reaction concentration c1 is detected at the first detection port 18. Carbon monoxide with a concentration of c1 is heated to a set temperature by the flue gas heater and then enters the reactor 5. The heated flue gas passes vertically through the carbon monoxide catalyst 16, where the carbon monoxide is oxidized to carbon dioxide, effectively removing carbon monoxide. The pre-reaction concentration c2 is detected at the second detection port 19. The carbon monoxide removal rate is calculated using the following formula: .

[0032] During the experiment, the temperature changes before and after reactor 5 were compared using the inlet temperature detector 13 and the outlet temperature detector 15 connected to reactor 5, and the exothermic reaction of carbon monoxide catalytic oxidation was calculated. The pressure loss of catalytic oxidation was measured using the differential pressure gauge 14 at the positions before and after carbon monoxide catalyst 16 on the upper wall of reactor 5.

Claims

1. A pilot-scale experimental platform for the catalytic oxidation of carbon monoxide in industrial flue gas, characterized in that: The system includes a skid (17) with a frame structure. A flue gas inlet pipe (1) connected to an industrial flue gas pipeline is mounted on the skid (17) via a bracket. The other end of the flue gas inlet pipe (1) is connected to a flue gas heater (4). A flue gas inlet valve (8) and a flue gas inlet detection device are sequentially installed on the flue gas inlet pipe (1) along the inlet direction. A second flue gas temperature measuring instrument (12) is installed on the flue gas outlet pipe of the flue gas heater (4). The other end of the outlet pipe is connected to a reactor (5), and a carbon monoxide catalyst (16) is installed inside the reactor (5). The outlet of the reactor (5) is connected to a flue gas outlet pipe (2). An induced draft fan (6) for ensuring smooth flue gas discharge and a control for flue gas discharge speed are sequentially installed on the flue gas outlet pipe (2). The reactor (5) is equipped with a flue gas outlet valve (9); an inlet temperature detector (13) is installed at the inlet of the reactor (5), an outlet temperature detector (15) is installed at the outlet, and a differential pressure gauge (14) is installed on the reactor (5); the output ends of the flue gas inlet detection device, the second flue gas temperature measuring instrument (12), the inlet temperature detector (13), the outlet temperature detector (15), and the differential pressure gauge (14) are connected to a control cabinet (20) installed on the skid (17) by a bracket; the input ends of the flue gas heater (4), the reactor (5), the induced draft fan (6), the flue gas outlet valve (9), and the flue gas inlet valve (8) are connected to the control cabinet, and the control cabinet is connected to an electrical cabinet (21) installed on the skid (17).

2. The pilot-scale experimental platform for catalytic oxidation of carbon monoxide in industrial flue gas according to claim 1, characterized in that: The flue gas inlet pipe (1) is connected to an air inlet pipe (3) for adjusting the carbon monoxide concentration. An air inlet valve (10) and an air heater (7) are sequentially arranged on the air inlet pipe (3) along the air inlet direction. The controlled ends of the air inlet valve (10) and the air heater (7) are connected to the control cabinet.

3. The pilot-scale experimental platform for catalytic oxidation of carbon monoxide in industrial flue gas according to claim 2, characterized in that: A first detection hole (18) is provided on the upper part of the flue gas inlet pipe (1) and downstream of the air inlet pipe (3).

4. A pilot-scale experimental platform for the catalytic oxidation of carbon monoxide in industrial flue gas according to claim 2, characterized in that: A heat tracing and insulation layer is provided on the flue gas inlet pipe (1), and an insulation layer is provided on the air inlet pipe (3) and the flue gas heater (4) outlet pipe. An anti-scalding insulation layer is provided on the flue gas outlet pipe (2).

5. A pilot-scale experimental platform for the catalytic oxidation of carbon monoxide in industrial flue gas according to claim 1, characterized in that: The flue gas inlet detection device includes a pressure measuring instrument (111), a flow measuring instrument (112), and a first flue gas temperature measuring instrument (113), and the output terminals of the pressure measuring instrument (111), the flow measuring instrument (112), and the first flue gas temperature measuring instrument (113) are connected to the control cabinet.

6. The pilot-scale experimental platform for catalytic oxidation of carbon monoxide in industrial flue gas according to claim 1, characterized in that: A second detection hole (19) is provided between the reactor (5) and the induced draft fan (6) on the flue gas outlet pipe (2).

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