Methane catalytic cracking hydrogen production device

Abstract

The invention belongs to the technical field of methane catalytic cracking hydrogen production, and particularly relates to a methane catalytic cracking hydrogen production device. Methane released by a methane buffer tank of the device enters a first-stage waste heat recoverer and a second-stage waste heat recoverer for primary heating, then enters a first-stage heater and a second-stage heater, is heated to a reaction temperature and then enters a cracking reactor to be in contact with a catalyst to generate hydrogen and byproduct carbon; hydrogen and by-product carbon are carried by methane to the second-stage waste heat recoverer and the first-stage waste heat recoverer to be primarily cooled, then enter the quench cooler to be cooled to the target temperature and then enter the bag type collector, the hydrogen and the methane penetrate through the bag type collector to enter the recovery section, and the by-product carbon is intercepted and stored in the bag type collector. Production and collection of hydrogen can be realized, and meanwhile, high-quality carbon by-products can be collected and utilized by optimizing reaction conditions and equipment design.

Description

Technical Field

[0001] The invention belongs to the technical field of methane catalytic cracking hydrogen production, and specifically relates to a methane catalytic cracking hydrogen production device. Background Art

[0002] As a hydrogen production technology, methane catalytic cracking has attracted widespread attention in recent years due to its huge potential. This process can not only effectively produce high-purity hydrogen, but also avoid the emission of carbon dioxide in traditional hydrogen production methods. However, in existing technologies and devices, the main purpose of development is to optimize the generation and collection of hydrogen, and the value and utilization of solid carbon byproducts produced during the reaction are often ignored.

[0003] Most traditional methane cracking devices regard solid carbon as a by-product and lack effective means to collect and utilize it. These carbon materials tend to accumulate in a disordered manner, leading to equipment blockage and catalyst deactivation problems, ultimately affecting the reaction efficiency and the service life of the device. However, the carbon by-products themselves have extremely high industrial application value. Materials such as carbon nanotubes, carbon black and graphite are widely used in electronics, aerospace, energy storage and other fields. If the formation and collection methods of carbon can be effectively controlled, it can not only improve the quality of carbon materials, but also turn these by-products into treasures, forming a dual value-added effect of hydrogen and carbon products. Summary of the invention

[0004] The purpose of the present invention is to provide a methane catalytic cracking hydrogen production device.

[0005] The present application provides a methane catalytic cracking hydrogen production device. The methane catalytic cracking hydrogen production device comprises: a methane buffer tank, a primary waste heat recovery device, a secondary waste heat recovery device, a primary heater, a secondary heater, a cracking reactor, a quencher and a bag collector connected in sequence; wherein

[0006] The methane released from the methane buffer tank enters the primary waste heat recovery device and the secondary waste heat recovery device for initial heating, and then enters the primary heater and the secondary heater. After being heated to the reaction temperature, it enters the cracking reactor to contact with the catalyst to generate hydrogen and by-product carbon; the hydrogen and by-product carbon are carried by methane to the secondary waste heat recovery device and the primary waste heat recovery device for initial cooling, and then enter the quench cooler to be cooled to the target temperature and then enter the bag collector. The hydrogen and methane pass through the bag collector and enter the recovery section, and the by-product carbon is intercepted and stored in the bag collector.

[0007] In one embodiment of the present application, the methane buffer tank is installed on a support, with an air inlet at the bottom and an air outlet, a pressure gauge and a safety valve at the top.

[0008] In one embodiment of the present application, the shell side of the primary waste heat recovery device is provided with a first methane inlet connected to the methane buffer tank, and a first methane outlet connected to the secondary waste heat recovery device;

[0009] The tube side of the first-stage waste heat recovery device is provided with a first gas production inlet connected to the second-stage waste heat recovery device, and a first gas production outlet connected to the quench cooler.

[0010] In one embodiment of the present application, the shell side of the secondary waste heat recovery device is provided with a second methane inlet connected to the primary waste heat recovery device, and a second methane outlet connected to the primary heater;

[0011] The tube side of the secondary waste heat recovery device is provided with a second gas production inlet connected to the cracking reactor, and a second gas production outlet connected to the primary waste heat recovery device.

[0012] In one embodiment of the present application, a first heating rod is provided in the primary heater;

[0013] The primary heater is provided with a third methane inlet connected to the secondary waste heat recovery device, a third methane outlet connected to the primary heater, and a first temperature sensor located at the third methane outlet.

[0014] In one embodiment of the present application, a second heating rod is provided in the secondary heater;

[0015] The secondary heater is provided with a fourth methane inlet connected to the primary heater, a fourth methane outlet connected to the cracking reactor, and a second temperature sensor located at the fourth methane outlet.

[0016] In one embodiment of the present application, the cleavage reactor comprises:

[0017] A reaction tube, the bottom of which is provided with a fifth methane inlet;

[0018] The expansion tube, whose inner diameter is larger than that of the reaction tube, is arranged at the top of the reaction tube and is provided with a catalyst inlet and a third gas production outlet for connecting with the secondary waste heat recovery device.

[0019] In one embodiment of the present application, an electric heater is provided in the reaction tube;

[0020] The expansion tube is also provided with a bursting disc and a third temperature sensor.

[0021] In one embodiment of the present application, the tube side of the quench cooler is provided with a fourth gas production inlet connected to the primary waste heat recovery device, and a fourth gas production outlet connected to the bag collector;

[0022] The shell side of the quench cooler is provided with a cooling inlet and a cooling outlet.

[0023] In one embodiment of the present application, the bag collector comprises:

[0024] The cylinder has a capture bag disposed inside, a fifth gas production inlet disposed on the side wall, a fifth gas production outlet disposed at the upper end, and a carbon outlet disposed at the lower end; a control valve is disposed at the carbon outlet;

[0025] a load cell for supporting the cylinder; and

[0026] The fourth temperature sensor is arranged on the side wall of the cylinder.

[0027] The beneficial effects of the present invention are:

[0028] Different from the prior art, the present application provides a methane catalytic cracking hydrogen production device. The methane released from the methane buffer tank of the methane catalytic cracking hydrogen production device enters the primary waste heat recovery device and the secondary waste heat recovery device for preliminary heating, and then enters the primary heater and the secondary heater. After being heated to the reaction temperature, it enters the cracking reactor to contact the catalyst to generate hydrogen and by-product carbon; the hydrogen and by-product carbon are carried by methane to the secondary waste heat recovery device and the primary waste heat recovery device for preliminary cooling, and then enter the quencher to cool to the target temperature and enter the bag collector. The hydrogen and methane pass through the bag collector and enter the recovery section, and the by-product carbon is intercepted and stored in the bag collector. While realizing the production and collection of hydrogen, the collection and utilization of high-quality carbon by-products can be carried out by optimizing the reaction conditions and equipment design.

[0029] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 is a schematic diagram of a methane catalytic cracking hydrogen production device according to a preferred embodiment of the present invention;

[0033] Figure 2 is a schematic diagram of a methane buffer tank according to a preferred embodiment of the present invention;

[0034] Figure 3 is a schematic diagram of a primary waste heat recovery device and a secondary waste heat recovery device according to a preferred embodiment of the present invention;

[0035] Figure 4 is a schematic diagram of a primary heater and a secondary heater according to a preferred embodiment of the present invention;

[0036] Figure 5 is a schematic diagram of a cracking reactor according to a preferred embodiment of the present invention;

[0037] Figure 6 is a schematic diagram of a quench cooler according to a preferred embodiment of the present invention;

[0038] Figure 7 It is a schematic diagram of a bag collector according to a preferred embodiment of the present invention.

[0039] In the figure:

[0040] Methane buffer tank 1, support 11, air inlet 12, air outlet 13, pressure gauge 14, safety valve 15;

[0041] A primary waste heat recovery device 2, a first methane inlet 21, a first methane outlet 22, a first gas production inlet 23, and a first gas production outlet 24;

[0042] Secondary waste heat recovery device 3, second methane inlet 31, second methane outlet 32, second gas production inlet 33, second gas production outlet 34;

[0043] A primary heater 4, a first heating rod 41, a third methane inlet 42, a third methane outlet 43, and a first temperature sensor 44;

[0044] Secondary heater 5, second heating rod 51, fourth methane inlet 52, fourth methane outlet 53, second temperature sensor 54;

[0045] Cracking reactor 6, reaction tube 61, fifth methane inlet 62, expansion tube 63, catalyst inlet 64, third gas production outlet 65, electric heater 66, bursting disc 67, third temperature sensor 68;

[0046] Quick cooler 7, fourth gas production inlet 71, fourth gas production outlet 72, cooling inlet 73, cooling outlet 74;

[0047] Bag collector 8 , cylinder 81 , collection bag 82 , fifth gas production inlet 83 , fifth gas production outlet 84 , carbon outlet 85 , weighing sensor 86 , fourth temperature sensor 87 . DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] The present application provides a methane catalytic cracking hydrogen production device, which is described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0050] See also Figure 1 In one embodiment of the present application, a methane catalytic cracking hydrogen production device includes: a methane buffer tank 1, a primary waste heat recovery device 2, a secondary waste heat recovery device 3, a primary heater 4, a secondary heater 5, a cracking reactor 6, a quencher 7 and a bag collector 8 connected in sequence; wherein the methane released from the methane buffer tank 1 enters the primary waste heat recovery device 2 and the secondary waste heat recovery device 3 for preliminary heating, and then enters the primary heater 4 and the secondary heater 5, and after being heated to the reaction temperature, enters the cracking reactor 6 to contact with the catalyst to generate hydrogen and by-product carbon; the hydrogen and by-product carbon are carried by methane to the secondary waste heat recovery device 3 and the primary waste heat recovery device 2 for preliminary cooling, and then enters the quencher 7 to cool to the target temperature and then enters the bag collector 8, the hydrogen and methane pass through the bag collector 8 and enter the recovery section, and the by-product carbon is intercepted and stored in the bag collector.

[0051] In this embodiment, the methane catalytic cracking hydrogen production device can collect and utilize high-quality carbon by-products by optimizing reaction conditions and equipment design while producing and collecting hydrogen; a two-stage waste heat recovery device is provided to save energy consumption; and a bag collector 8 is provided to recover by-product carbon.

[0052] For details, see Figure 2 In one embodiment, the methane buffer tank 1 is installed on a support 11, an air inlet 12 is provided at the bottom, and an air outlet 13, a pressure gauge 14 and a safety valve 15 are provided at the top.

[0053] In this embodiment, the air inlet 12 on the methane buffer tank 1 may be connected to the methane storage container; and the air outlet 13 may be connected to the primary waste heat recovery device 2 .

[0054] For further information, see Figure 3The shell side of the first-stage waste heat recovery device 2 is provided with a first methane inlet 21 connected to the methane buffer tank 1, and a first methane outlet 22 connected to the second-stage waste heat recovery device 3; the tube side of the first-stage waste heat recovery device 2 is provided with a first gas production inlet 23 connected to the second-stage waste heat recovery device 3, and a first gas production outlet 24 connected to the quencher 7; the shell side of the second-stage waste heat recovery device 3 is provided with a second methane inlet 31 connected to the first-stage waste heat recovery device 2, and a second methane outlet 32 ​​connected to the first-stage heater 4; the tube side of the second-stage waste heat recovery device 3 is provided with a second gas production inlet 33 connected to the cracking reactor 6, and a second gas production outlet 34 connected to the first-stage waste heat recovery device 2.

[0055] In this embodiment, the two-stage waste heat recovery device can recover the waste heat of the gas produced by the cracking reactor 6 and preheat the methane discharged from the methane buffer tank 1 to achieve waste heat recovery and utilization.

[0056] For further information, see Figure 4 The first heater 4 is provided with a first heating rod 41; the first heater 4 is provided with a third methane inlet 42 connected to the second waste heat recovery device 3, a third methane outlet 43 connected to the first heater 4, and a first temperature sensor 44 located at the third methane outlet 43. The second heater 5 is provided with a second heating rod 51; the second heater 5 is provided with a fourth methane inlet 52 connected to the first heater 4, a fourth methane outlet 53 connected to the cracking reactor 6, and a second temperature sensor 54 located at the fourth methane outlet 53.

[0057] In this embodiment, the heating rod can be heated by an inserted ceramic electric heating rod, the temperature is controlled by a thyristor, and the thermometer sleeve is made of corundum; the heater adopts embedded heating, which has high heat transfer efficiency and saves space; the temperature sensor can be used to monitor the temperature of methane after heating, so as to feedback and adjust the output temperature of the heating rod; for further information, see Figure 5 The cracking reactor 6 includes: a reaction tube 61, a fifth methane inlet 62 is arranged at the bottom of the reaction tube 61; an expansion tube 63 with an inner diameter larger than that of the reaction tube 61, which is arranged at the top of the reaction tube 61 and has a catalyst inlet 64 and a third gas production outlet 65 for connecting to the secondary waste heat recovery device 3.

[0058] In this embodiment, the catalyst inlet 64 can be used to add catalyst into the reaction tube 61; methane heated to the reaction temperature enters the cracking reactor and contacts the catalyst to generate hydrogen and by-product carbon; methane flows from bottom to top and floats the catalyst; since the inner diameter of the expansion tube 63 is larger than the reaction tube 61, the gas flow rate decreases after entering the expansion tube 63, and the buoyancy of the catalyst is not sufficient to drive the catalyst after entering the expansion tube 63, so the catalyst can return to the reaction tube 61; and hydrogen and carbon are carried out of the expansion tube 63 by methane and discharged from the third gas production outlet 65.

[0059] Optionally, the reaction tube 61 is provided with an electric heater 66; the electric heater 66 can be heated by an inner wall electric heater; the embedded heating has high heat transfer efficiency and saves reactor space. The expansion tube 63 is also provided with a bursting disc 67 and a third temperature sensor 68; the bursting disc 67 can explode and release pressure when the pressure in the reactor exceeds the standard to protect the equipment; the third temperature sensor 68 can be used to detect the reaction temperature to feedback and adjust the output temperature of the electric heater 66.

[0060] For further information, see Figure 6 The tube side of the quench cooler 7 is provided with a fourth gas production inlet 71 connected to the first-stage waste heat recovery device 2, and a fourth gas production outlet 72 connected to the bag collector 8; the shell side of the quench cooler 7 is provided with a cooling inlet 73 and a cooling outlet 74.

[0061] In this embodiment, the cooling medium can enter from the cooling inlet 73 and be discharged from the cooling outlet 74; the mixed gas discharged from the cracking reactor 6 recovers the waste heat through the secondary waste heat recovery device 3 and the primary waste heat recovery device 2, enters the quench cooler 7 from the fourth gas production inlet 71 for cooling, and is discharged from the fourth gas production outlet 72.

[0062] For further information, see Figure 7 The bag collector 8 includes: a cylinder 81, in which a collecting bag 82 is arranged, a fifth gas production inlet 83 is arranged on the side wall, a fifth gas production outlet 84 is arranged at the upper end, and a carbon outlet 85 is arranged at the lower end; a control valve is arranged at the carbon outlet 85; a weighing sensor 86, used to support the cylinder 81; and a fourth temperature sensor 87, which is arranged on the side wall of the cylinder 81.

[0063] In this embodiment, the mixed gas after cooling enters the cylinder 81 from the fifth gas production inlet 83, the by-product carbon is intercepted by the capture bag 82 and falls on the bottom of the cylinder 81, and the hydrogen and methane pass through the capture bag 82 and are discharged from the fifth gas production outlet 84 to the subsequent hydrogen collection section; when the weighing sensor 86 detects that the by-product carbon in the cylinder 81 reaches a preset weight, the control valve can be controlled by the control module to open to discharge the by-product carbon.

[0064] Optionally, a nitrogen backwash port may be provided on the upper side of the capture bag 82 to backwash and clean the capture bag 82 .

[0065] It should be noted that the various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0066] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0068] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A methane catalytic cracking hydrogen production device, characterized in that: include: A methane buffer tank (1), a primary waste heat recovery device (2), a secondary waste heat recovery device (3), a primary heater (4), a secondary heater (5), a cracking reactor (6), a quencher (7) and a bag collector (8) are connected in sequence; wherein The methane released from the methane buffer tank (1) enters the primary waste heat recovery device (2) and the secondary waste heat recovery device (3) for preliminary heating, and then enters the primary heater (4) and the secondary heater (5). After being heated to the reaction temperature, the methane enters the cracking reactor (6) to contact with the catalyst to generate hydrogen and by-product carbon. The hydrogen and by-product carbon are carried by the methane to the secondary waste heat recovery device (3) and the primary waste heat recovery device (2) for preliminary cooling, and then enter the quench cooler (7) to cool to the target temperature and then enter the bag collector (8). The hydrogen and methane pass through the bag collector (8) and enter the recovery section, and the by-product carbon is intercepted and stored in the bag collector.

2. The methane catalytic cracking hydrogen production device according to claim 1, characterized in that: The methane buffer tank (1) is installed on a support (11), and is provided with an air inlet (12) at the bottom, and an air outlet (13), a pressure gauge (14) and a safety valve (15) at the top.

3. The methane catalytic cracking hydrogen production device according to claim 1, characterized in that: The shell side of the primary waste heat recovery device (2) is provided with a first methane inlet (21) connected to the methane buffer tank (1), and a first methane outlet (22) connected to the secondary waste heat recovery device (3); The tube side of the first-stage waste heat recovery device (2) is provided with a first gas production inlet (23) connected to the second-stage waste heat recovery device (3), and a first gas production outlet (24) connected to the quench cooler (7).

4. The methane catalytic cracking hydrogen production device according to claim 3, characterized in that: The shell side of the secondary waste heat recovery device (3) is provided with a second methane inlet (31) connected to the primary waste heat recovery device (2), and a second methane outlet (32) connected to the primary heater (4); The tube side of the secondary waste heat recovery device (3) is provided with a second gas production inlet (33) connected to the cracking reactor (6), and a second gas production outlet (34) connected to the primary waste heat recovery device (2).

5. The methane catalytic cracking hydrogen production device according to claim 1, characterized in that: The first-stage heater (4) is provided with a first heating rod (41); The primary heater (4) is provided with a third methane inlet (42) connected to the secondary waste heat recovery device (3), a third methane outlet (43) connected to the primary heater (4), and a first temperature sensor (44) located at the third methane outlet (43).

6. The methane catalytic cracking hydrogen production device according to claim 5, characterized in that: The secondary heater (5) is provided with a second heating rod (51); The secondary heater (5) is provided with a fourth methane inlet (52) connected to the primary heater (4), a fourth methane outlet (53) connected to the cracking reactor (6), and a second temperature sensor (54) located at the fourth methane outlet (53).

7. The methane catalytic cracking hydrogen production device according to claim 1, characterized in that: The cleavage reactor (6) comprises: A reaction tube (61) having a fifth methane inlet (62) disposed at the bottom thereof; An expansion tube (63) having an inner diameter larger than that of the reaction tube is arranged at the top end of the reaction tube (61) and is provided with a catalyst inlet (64) and a third gas production outlet (65) for connecting to the secondary waste heat recovery device (3).

8. The methane catalytic cracking hydrogen production device according to claim 7, characterized in that: An electric heater (66) is arranged in the reaction tube (61); The expansion tube (63) is also provided with a bursting disc (67) and a third temperature sensor (68).

9. The methane catalytic cracking hydrogen production device according to claim 1, characterized in that: The tube side of the quench cooler (7) is provided with a fourth gas production inlet (71) connected to the primary waste heat recovery device (2), and a fourth gas production outlet (72) connected to the bag collector (8); The shell side of the quench cooler (7) is provided with a cooling inlet (73) and a cooling outlet (74).

10. The methane catalytic cracking hydrogen production device according to claim 1, characterized in that: The bag-type collector (8) comprises: A cylinder (81) is provided with a capture bag (82) inside, a fifth gas production inlet (83) is provided on the side wall, a fifth gas production outlet (84) is provided at the upper end, and a carbon outlet (85) is provided at the lower end; a control valve is provided at the carbon outlet (85); A weighing sensor (86) for supporting the cylinder (81); and The fourth temperature sensor (87) is arranged on the side wall of the cylinder (81).

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