Natural gas hydrogen production convection section waste heat recovery device

Abstract

The utility model relates to the technical field of natural gas hydrogen production, in particular to a natural gas hydrogen production convection section waste heat recovery device which is characterized in that a plurality of connecting plates are arranged on the inner wall of a tank body; a plurality of limiting grooves are formed in the baffle; the device has the beneficial effects that when high-temperature flue gas enters the tank body, different gases in each heat exchange box can be respectively heated, so that each gas reaches the reaction temperature, the heat energy of the high-temperature flue gas is utilized in a grading manner, the heat energy is recycled to the greatest extent, and the heat efficiency of the device is improved; the movable plate moves along the limiting groove, the movable plate can block the vent groove and prevent high-temperature flue gas from entering the next cavity, the high-temperature flue gas directionally enters the designated cavity and the heat exchange box through the electric control valve and the connecting pipe, and a worker can control the high-temperature flue gas amount of the cavity in the tank body so as to change the temperature in each cavity. The temperature of gas in the heat exchange box is changed, and the recycling rate of the device is increased.

Description

Technical Field

[0001] The utility model relates to the field of natural gas hydrogen production, in particular to a waste heat recovery device for a convection section of natural gas hydrogen production. Background Art

[0002] Hydrogen energy is a secondary energy source. Common methods for producing hydrogen include: hydrogen production from various mineral fuels, hydrogen production from water electrolysis, hydrogen production from biomass, hydrogen production from other hydrogen-containing substances, and recovery of hydrogen produced as a by-product of various chemical processes. Hydrogen production from various mineral fuels is the main method for producing hydrogen, but its reserves are limited, and the hydrogen production process will cause pollution to the environment. In the long run, hydrogen production from water is the most promising method. The raw materials are inexhaustible, and hydrogen releases energy after combustion and generates water, which does not cause environmental pollution.

[0003] In the prior art, in the hydrogen production process, the front part requires high temperature operation, and the product hydrogen is close to room temperature. The recovery and utilization of waste heat during this period is crucial to the operating costs of the device and directly affects the energy consumption and hydrogen cost of the device.

[0004] However, the traditional waste heat recovery device recovers the waste heat from the high-temperature flue gas through a single operation, and the waste heat recovery efficiency is low. Most of the waste heat from the high-temperature flue gas cannot be effectively recovered, the thermal efficiency is low, and the practicality is low. Utility Model Content

[0005] The purpose of the utility model is to provide a waste heat recovery device for the convection section of natural gas hydrogen production to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a waste heat recovery device for a convection section of hydrogen production from natural gas, the waste heat recovery device for a convection section of hydrogen production from natural gas comprising: a tank body, a plurality of connecting plates are arranged on the inner wall of the tank body, and a plurality of electric control valves are arranged on the outer side of the tank body;

[0007] The baffle is provided with a plurality of limit grooves.

[0008] Preferably, the connecting plate is fixedly connected to the inner wall of the tank body, the connecting plate is a square plate structure, the connecting plate is fixedly connected to the heat exchange box, and the pipes on the heat exchange box are respectively connected to the air inlet valve and the air outlet valve fixedly connected to the tank body.

[0009] Preferably, the air outlets of the electric control valves are connected via a connecting pipe, the electric control valves are fixedly connected to the tank body, a plurality of temperature sensors are fixedly connected to the tank body, and a heat-insulating layer is fixedly connected to the outer wall of the tank body.

[0010] Preferably, the limiting groove is a "convex" groove structure, and a limiting block is arranged in the limiting groove, and the limiting block can slide along the limiting groove.

[0011] Preferably, the limit block is a "convex" plate-like structure, the limit block is fixedly connected to the movable plate, the movable plate is a square plate-like structure, the threaded hole on the movable plate is threadedly connected to the threaded rod, the movable plate is tightly attached to the baffle, the baffle is fixedly connected to the inner wall of the tank body, the baffle divides the tank body into several chambers, and a ventilation groove is opened on the baffle, and the ventilation groove is a square groove-like structure.

[0012] Preferably, the threaded rod is rotatably connected to the inner wall of the tank body, the threaded rod passes through the tank body and the hole opened on the insulation layer and is fixedly connected to the transmission shaft of the motor, the motor is fixedly connected to the insulation layer, and a bracket is fixedly connected to the insulation layer.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model proposes a waste heat recovery device for the convection section of hydrogen production from natural gas, which discharges high-temperature flue gas into the interior of a tank body through an air inlet pipe of the device, and a natural gas-steam mixture is discharged into a heat exchange box through a pipeline via an air inlet valve closest to the air inlet pipe. The high-temperature flue gas in the tank body heats the natural gas-steam mixture in the heat exchange box, and then is discharged to the reformer through an air outlet valve to participate in the reaction, and the raw gas, steam desalted water and air are respectively connected to the air inlet valve through pipes in sequence, and the high-temperature flue gas in the tank body heats the gas in each heat exchange box respectively, and then is discharged to the reformer through the air outlet valve to participate in the reaction, and the baffle divides the tank body into a plurality of chambers, each of which is provided with a heat exchange box. When the high-temperature flue gas enters the tank body, different gases in each heat exchange box can be heated respectively, so that each gas reaches the reaction temperature, and the high-temperature flue gas is utilized in a graded manner. The heat energy of the gas is recovered to the greatest extent possible, and the thermal efficiency of the device is improved. The staff can start the motor to drive the threaded rod to rotate in the direction of the threaded hole on the movable plate, so that the movable plate and the limit block move along the limit groove opened on the baffle plate. The movable plate can block the ventilation groove to prevent the high-temperature flue gas from entering the next chamber. The electric control valve is started to control the high-temperature flue gas to enter the designated chamber through the electric control valve and the connecting pipe. The heat exchange box, finally, the flue gas is discharged into the last chamber through the ventilation groove or the electric control valve in conjunction with the connecting pipe, and finally discharged from the exhaust pipe. The above is combined with the temperature sensor, so that the staff can directionally control the amount of high-temperature flue gas in the chamber of the tank body and thus change the temperature in each chamber, thereby changing the temperature of the gas in the heat exchange box, improving the reaction effect, facilitating the actual use of the staff, and improving the use effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0017] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0018] Figure 4 for Figure 2 Enlarged structural diagram at B in the middle.

[0019] In the figure: 1. tank body; 2. baffle; 3. connecting plate; 4. insulation layer; 5. electric control valve; 6. threaded rod;

[0020] 7. Temperature sensor; 8. Limiting groove; 9. Ventilation groove; 10. Limiting block; 11. Moving plate; 12. Heat exchange box; 13. Inlet valve; 14. Outlet valve; 15. Connecting pipe; 16. Bracket; 17. Motor. DETAILED DESCRIPTION

[0021] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1

[0023] See also Figure 1-Figure 4 The utility model provides a technical solution: a waste heat recovery device for the convection section of natural gas hydrogen production, the waste heat recovery device for the convection section of natural gas hydrogen production comprises: a tank body 1, a plurality of connecting plates 3 are arranged on the inner wall of the tank body 1, a plurality of electric control valves 5 are arranged on the outer side of the tank body 1; a baffle plate 2, a plurality of limit grooves 8 are opened on the baffle plate 2;

[0024] During specific use, the staff first discharges the high-temperature flue gas from the air inlet pipe of the device into the tank body 1, and the staff discharges the natural gas-steam mixture into the heat exchange box 12 through the air inlet valve 13 closest to the air inlet pipe. The high-temperature flue gas in the tank body 1 heats the natural gas-steam mixture in the heat exchange box 12, and then is discharged to the converter through the air outlet valve 14 to participate in the reaction. The staff then connects the raw gas, steam desalted water and air to the air inlet valve 13 through pipes in turn. The high-temperature flue gas in the tank body 1 heats the raw gas, steam desalted water and air in each heat exchange box 12 respectively, and the raw gas, steam desalted water and air are finally discharged to the converter through the air outlet valve 14 to participate in the reaction, and the flue gas in the tank body 1 is finally discharged from the air outlet pipe.

[0025] Embodiment 2

[0026] On the basis of the first embodiment, in order to improve the utilization rate of the high-temperature flue gas by the device, a connecting plate 3 is provided, the connecting plate 3 is fixedly connected to the inner wall of the tank body 1, the connecting plate 3 is a square plate structure, the connecting plate 3 is fixedly connected to the heat exchange box 12, the pipes on the heat exchange box 12 are respectively connected to the inlet valve 13 and the outlet valve 14 fixedly connected to the tank body 1, the staff discharges the gas into the heat exchange box 12 through the outlet valve 14, the high-temperature flue gas heats the gas in the heat exchange box 12 and is finally discharged into the reactor by the outlet valve 14 for reaction, the limit block 10 is a "convex" plate structure, the limit block 10 is fixedly connected to the movable plate 11, the movable plate 11 It has a square plate-like structure, the threaded holes on the movable plate 11 are threadedly connected to the threaded rod 6, the movable plate 11 is in close contact with the baffle 2, the baffle 2 is fixedly connected to the inner wall of the tank body 1, the baffle 2 divides the tank body 1 into a number of chambers, and the baffle 2 is provided with ventilation grooves 9, the ventilation grooves 9 are square groove-like structures, the baffle 2 divides the tank body 1 into a number of chambers, each chamber is provided with a heat exchange box 12, when the high-temperature flue gas enters the tank body 1, the different gases in each heat exchange box 12 can be heated separately, so that each gas reaches the reaction temperature, and the thermal energy of the high-temperature flue gas is utilized in a graded manner, the heat energy is recovered to the greatest extent possible, and the recovery efficiency of the device is improved.

[0027] Embodiment 3

[0028] On the basis of the second embodiment, in order to improve the use effect of the device, an electric control valve 5 is provided, and the air outlets of each electric control valve 5 are connected by a connecting pipe 15. The electric control valve 5 is fixedly connected to the tank body 1. A plurality of temperature sensors 7 are fixedly connected in the tank body 1. The outer wall of the tank body 1 is fixedly connected with a thermal insulation layer 4. Each electric control valve 5 is connected by a connecting pipe 15. The thermal insulation layer 4 can insulate the tank body 1. High-temperature flue gas can enter different chambers through the electric control valve 5 and the connecting pipe 15. The limit groove 8 is a "convex" groove structure. A limit block 10 is provided in the limit groove 8. The limit block 10 can slide along the limit groove 8. The staff starts the motor 17 to drive the threaded rod 6 to rotate. The threaded rod 6 cooperates with the threaded holes on the movable plate 11, so that the movable plate 11 and the limit block 10 can move along the limit groove 8. The threaded rod 6 and The inner wall of the tank body 1 is rotatably connected, the threaded rod 6 passes through the tank body 1 and the hole opened on the insulation layer 4 and is fixedly connected to the transmission shaft of the motor 17, the motor 17 is fixedly connected to the insulation layer 4, and the insulation layer 4 is fixedly connected with a bracket 16, and the bracket 16 on the device is fixed on a plane. The above structures cooperate with each other, and the staff can start the motor 17 to drive the threaded rod 6 to rotate, so that the movable plate 11 and the limit block 10 move along the limit groove 8. The movable plate 11 can block the ventilation groove 9 to prevent the high-temperature flue gas from entering the next chamber. Starting the electric control valve 5 can control the high-temperature flue gas to enter the designated chamber in a directional manner. The above is combined with the temperature sensor 7, so that the staff can directionally control the temperature in each chamber in the tank body 1, thereby changing the temperature of the gas in the heat exchange box 12, improving the reaction effect, and facilitating the actual use of the staff.

[0029] In actual use, the high-temperature flue gas is discharged into the tank body 1 through the air inlet pipe of the device, and the natural gas-steam mixture is discharged into the heat exchange box 12 through the pipeline through the air inlet valve 13 closest to the air inlet pipe. The high-temperature flue gas in the tank body 1 heats the natural gas-steam mixture in the heat exchange box 12, and then is discharged to the converter from the air outlet valve 14 to participate in the reaction. The raw gas, steam desalted water and air are connected to the air inlet valve 13 through pipes in turn. The high-temperature flue gas in the tank body 1 heats the gas in each heat exchange box 12 respectively, and then is discharged from the air outlet valve 14 to the converter to participate in the reaction. The baffle 2 divides the tank body 1 into several chambers, each of which is provided with a heat exchange box 12. When the high-temperature flue gas enters the tank body 1, different gases in each heat exchange box 12 can be heated separately to make each gas reach the reaction temperature, and the thermal energy of the high-temperature flue gas is utilized in a graded manner to maximize the recovery. Heat energy is collected to improve the thermal efficiency of the device, and the staff can start the motor 17 to drive the threaded rod 6 to rotate along the direction of the threaded hole on the movable plate 11, so that the movable plate 11 and the limit block 10 move along the limit groove 8 opened on the baffle 2, and the movable plate 11 can block the ventilation groove 9 to prevent the high-temperature flue gas from entering the next chamber, and start the electric control valve 5 to control the high-temperature flue gas to enter the heat exchange box 12 in the designated chamber through the electric control valve 5 and the connecting pipe 15. Finally, the flue gas is discharged into the last chamber through the ventilation groove 9 or the electric control valve 5 in conjunction with the connecting pipe 15, and finally discharged from the exhaust pipe. The above-mentioned temperature sensor 7 is combined to enable the staff to directionally control the amount of high-temperature flue gas in the chamber of the tank body 1 and thus change the temperature in each chamber, thereby changing the temperature of the gas in the heat exchange box 12, thereby improving the reaction effect, facilitating the actual use of the staff, and improving the use effect of the device.

[0030] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for the convection section of natural gas hydrogen production, characterized in that: The waste heat recovery device for the convection section of natural gas hydrogen production comprises: a tank body (1), a plurality of connecting plates (3) are arranged on the inner wall of the tank body (1), and a plurality of electric control valves (5) are arranged on the upper outer side of the tank body (1); The baffle plate (2) is provided with a plurality of limit grooves (8).

2. A waste heat recovery device for convection section of natural gas hydrogen production according to claim 1, characterized in that: The connecting plate (3) is fixedly connected to the inner wall of the tank body (1); the connecting plate (3) is in a square plate-shaped structure; the connecting plate (3) is fixedly connected to the heat exchange box (12); and the pipes on the heat exchange box (12) are respectively connected to the air inlet valve (13) and the air outlet valve (14) fixedly connected to the tank body (1).

3. A waste heat recovery device for convection section of natural gas hydrogen production according to claim 1, characterized in that: The air outlets of the electric control valves (5) are connected via a connecting pipe (15); the electric control valves (5) are fixedly connected to the tank body (1); a plurality of temperature sensors (7) are fixedly connected inside the tank body (1); and a heat-insulating layer (4) is fixedly connected to the outer wall of the tank body (1).

4. A waste heat recovery device for convection section of natural gas hydrogen production according to claim 1, characterized in that: The limiting groove (8) is in the form of a "convex" groove structure, a limiting block (10) is arranged in the limiting groove (8), and the limiting block (10) can slide along the limiting groove (8).

5. A waste heat recovery device for convection section of hydrogen production from natural gas according to claim 4, characterized in that: The limit block (10) is in a convex plate-like structure. The limit block (10) is fixedly connected to the movable plate (11). The movable plate (11) is in a square plate-like structure. The threaded hole on the movable plate (11) is threadedly connected to the threaded rod (6). The movable plate (11) is in close contact with the baffle plate (2). The baffle plate (2) is fixedly connected to the inner wall of the tank body (1). The baffle plate (2) divides the tank body (1) into a plurality of chambers. A ventilation groove (9) is provided on the baffle plate (2). The ventilation groove (9) is in a square groove-like structure.

6. A waste heat recovery device for convection section of natural gas hydrogen production according to claim 5, characterized in that: The threaded rod (6) is rotatably connected to the inner wall of the tank body (1); the threaded rod (6) passes through the tank body (1) and a hole opened on the thermal insulation layer (4) and is fixedly connected to the transmission shaft of the motor (17); the motor (17) is fixedly connected to the thermal insulation layer (4); and a bracket (16) is fixedly connected to the thermal insulation layer (4).

Images