Novel tubular thermocatalytic reactor

Abstract

The utility model relates to a novel tubular thermocatalytic reactor, which comprises a metal outer tube, a glass inner tube, an air inlet joint and an air outlet joint, the glass inner tube is inserted into the metal outer tube, a gap is reserved between the glass inner tube and the metal outer tube, the air inlet joint is hermetically connected with the front end of the metal outer tube, and an air passage communicated with the gap is arranged between the air inlet joint and the front end of the glass inner tube. An inner sealing ring is arranged in the air channel, and the air outlet connector is connected with the rear end of the metal outer pipe and the rear end of the glass inner pipe in a sealed mode. According to the novel tubular thermocatalytic reactor provided by the utility model, the metal outer tube is matched with the glass inner tube for use, the catalytic reaction of the novel tubular thermocatalytic reactor in normal-pressure and high-pressure environments can be realized by utilizing the inner sealing ring, a catalyst can be effectively prevented from being in contact with the metal tube wall, reaction gas is prevented from reacting with the metal wall surface, and the service life of the novel tubular thermocatalytic reactor is prolonged. The unique design structure can cover most reaction types, and the reactor has the advantages of simplicity and convenience in operation, wide application range and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the tubular reactor technical field, especially relates to a novel tubular thermal catalytic reactor. BACKGROUND

[0002] The fixed bed catalytic reaction device is the commonly used device for gas-solid phase reaction research and catalyst performance evaluation, the tubular reactor commonly used in the laboratory at present mostly adopts quartz tube (used under normal pressure) or metal reaction tube (used under high pressure), the metal reaction tube can be used for high-pressure catalytic reaction, but cannot avoid the reaction such as methane catalysis, and the gas will be catalyzed with the metal under high temperature, and then carbon deposition or by-product is generated on the inner wall of the metal tube, and the product detection is affected.

[0003] Therefore, it is of great significance to develop a tubular reactor which can be used under normal pressure and high pressure, and can effectively avoid the catalyst contacting the metal and the reaction gas reacting with the metal wall, thereby affecting the experimental results. UTILITY MODEL CONTENT

[0004] Therefore, the utility model discloses a novel tubular thermal catalytic reactor, which can be used for high-pressure reaction and effectively prevent the reaction gas from reacting with the reactor wall.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A novel tubular thermal catalytic reactor, comprising a metal outer tube, a glass inner tube, a gas inlet joint and a gas outlet joint, the glass inner tube is inserted into the metal outer tube, and a gap is left between the two, the gas inlet joint is in sealed connection with the front end of the metal outer tube, a gas channel is arranged between the gas inlet joint and the front end of the glass inner tube, and an inner sealing ring is arranged in the gas channel, and the gas outlet joint is in sealed connection with the rear end of the metal outer tube and the rear end of the glass inner tube.

[0007] In order to better realize the utility model, the front end of the metal outer tube is provided with a front cover structure, and the rear end of the metal outer tube is provided with a rear cover structure.

[0008] In order to better realize the utility model, the gas inlet joint and the front cover structure are provided with an outer sealing ring, and the gas outlet joint and the rear cover structure are also provided with an outer sealing ring.

[0009] In order to better realize the utility model, the gas outlet joint and the rear end of the glass inner tube are also provided with an inner sealing ring.

[0010] For better implementation of the utility model, in the above structure is further optimized, the air inlet joint is screwed with the front cover structure.

[0011] For better implementation of the utility model, in the above structure is further optimized, still include fixed sleeve, fixed sleeve is sleeved in the rear end of glass inner tube, the air outlet joint is screwed with fixed sleeve.

[0012] For better implementation of the utility model, in the above structure is further optimized, still include locking nut, locking nut is connected on the air outlet joint and is screwed with rear cover structure.

[0013] For better implementation of the utility model, in the above structure is further optimized, glass inner tube adopts quartz glass.

[0014] For better implementation of the utility model, in the above structure is further optimized, metal outer tube adopts stainless steel material.

[0015] For better implementation of the utility model, in the above structure is further optimized, inner sealing ring and outer sealing ring all adopt perfluorinated rubber material.

[0016] The utility model has the following beneficial effects compared with prior art:

[0017] The novel tubular thermal catalytic reactor provided by the utility model mainly uses metal outer tube in cooperation with glass inner tube, utilizes inner sealing ring to realize catalytic reaction of the device under normal pressure and high pressure, can effectively avoid catalyst contact with metal tube wall, prevents reaction gas from reacting with metal wall surface, and the unique design structure can be compatible with most reaction types, has the advantages of simple reactor operation, wide application range etc. BRIEF DESCRIPTION OF DRAWINGS

[0018] For more clearly explaining the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without paying creative labor.

[0019] Figure 1 It is the front view of the reactor of the utility model,

[0020] Figure 2 It is Figure 1 The local enlarged structure schematic view of A in it,

[0021] Figure 3 It is Figure 1 The local enlarged structure schematic view of B in it.

[0022] Fig.:

[0023] 1-metal outer tube, 101-front cover structure, 102-rear cover structure, 2-glass inner tube, 3-gas inlet joint, 4-gas outlet joint, 5-gap, 6-air channel, 7-inner sealing ring, 8-outer sealing ring, 9-fixing sleeve, 10-locking nut. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0025] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "multiple" is two or more than two; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present application, it should also be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] Please refer to Figures 1-3The utility model provides a novel tubular heat catalytic reactor, including metal outer tube 1, glass inner tube 2, gas inlet joint 3 and gas outlet joint 4, glass inner tube 2 inserts metal outer tube 1 and leaves gap 5 between both, and gas inlet joint 3 is connected with the front end of metal outer tube 1, and gas inlet joint 3 and glass inner tube 2 front end are provided with the air passage 6 of intercommunication gap 5, is provided with inner sealing ring 7 in air passage 6, can make air passage 6 block or intercommunication by installing or taking off inner sealing ring 7, after taking off inner sealing ring 7, air passage 6 is communicated with gap 5, and the gas that enters from gas inlet joint 3 can pass through air passage 6 and enter the gap 5 between glass inner tube 2 and metal outer tube 1. Gas outlet joint 4 is connected with the rear end of metal outer tube 1 and the rear end of glass inner tube 2 respectively, and the rear end of gap 5 is blocked, so that the catalytic gas can only pass through the air passage 6 of the front end of reactor and enter gap 5.

[0028] When used in normal pressure state, glass inner tube 2 can bear the pressure of gas completely, therefore, install inner sealing ring 7, make glass inner tube 2 and metal outer tube 1 be separated completely through sealing ring, and the catalytic gas enters glass inner tube 2 from gas inlet joint 3, then is discharged from gas outlet joint 4, and does not contact with metal outer tube 1 in the way, which avoids the influence of the reaction of catalytic gas and metal inner wall on experimental effect.

[0029] When used in high pressure state, glass inner tube 2 needs to bear greater gas pressure, therefore, take off inner sealing ring 7, make air passage 6 intercommunicate with gap 5, after intercommunication, the air pressure of glass inner tube 2 is transmitted to metal outer tube 1 outside, and glass inner tube 2 does not bear high pressure gas, but bears greater gas pressure through metal outer tube 1 outside instead. But metal outer tube 1 can react with catalytic gas, therefore, needs to pass inert gas into gap 5 to replace before carrying out catalytic reaction, and the inert gas in gap 5 after replacement is filled, and gap 5 can only enter through air passage 6, and the inert gas in the inside cannot be discharged, forming dead volume area, when the catalytic gas enters glass inner tube 2 from gas inlet joint 3, the inert gas in dead volume area cannot be discharged, and the catalytic gas is discharged directly through gas outlet joint 4 at the rear end of glass inner tube 2. A small amount of catalytic gas can pass through gas replacement with inert gas in the interlayer of gap 5 in the whole reaction process, but the whole process is slow, and most of the catalytic gas still flows directly through the inside of glass inner tube 2 to react, therefore, the catalytic gas almost has no contact with metal in the whole reaction process, and even if there is a small amount of catalytic gas replacement, the influence on experimental result is also very small.

[0030] In order to facilitate assembly and sealing, the front end of metal outer tube 1 is provided with front cover structure 101, and the rear end of metal outer tube 1 is provided with rear cover structure 102. Gas inlet joint 3 and front cover structure 101 are provided with outer sealing ring 8, and gas inlet joint 3 is threadedly connected with front cover structure 101, and the self-locking of thread and outer sealing ring 8 are used to tightly connect gas inlet joint 3 and the front end of metal outer tube 1, and the sealing performance is excellent.

[0031] An outer sealing ring 8 is also arranged between the gas outlet joint 4 and the rear cover structure 102. A locking nut 10 is also included, which is clamped on the gas outlet joint 4 and is threadedly connected with the rear cover structure 102, and the gas outlet joint 4 is tightly connected with the rear end of the metal outer tube 1 by the locking nut 10 and the outer sealing ring 8.

[0032] An inner sealing ring 7 is also arranged between the gas outlet joint 4 and the rear end of the glass inner tube 2. A fixing sleeve 9 is also included, which is sleeved on the rear end of the glass inner tube 2, and the gas outlet joint 4 is threadedly connected with the fixing sleeve 9, and the gas outlet joint 4 is tightly connected with the fixing sleeve 9 while being sealed with the rear end of the glass inner tube 2 by the inner sealing ring 7.

[0033] As a preferred solution, the glass inner tube 2 adopts quartz glass, uses a welded hollow quartz sand core as a catalyst loading platform, and a central hole can be inserted into a thermocouple to monitor the bed temperature. Moreover, the outer diameter of the glass inner tube 2 should be as close as possible to the inner diameter of the metal outer tube 1, which can effectively reduce the dead volume zone of the reactor. The metal outer tube 1 adopts stainless steel material and is welded at both ends with the front cover structure 101 and the rear cover structure 102. The inner sealing ring 7 and the outer sealing ring 8 both adopt perfluorinated rubber material.

[0034] When assembling, it should be ensured that the accessories are complete and the appearance is intact, the threads should not be knocked, the sealing surface should not have scratches, and the sealing ring should not have cracks. For dirty parts, they should be cleaned before use. It needs to be noted that the quartz reactor should be handled with care to avoid knocking.

[0035] Step one: first, the fixing sleeve 9 is sleeved on the rear end of the glass inner tube 2, and then the inner sealing ring 7 is also sleeved on the rear end of the glass inner tube 2,

[0036] Step two: insert the rear end of the glass inner tube 2 into the gas outlet joint 4, connect by threads, tightly connect the gas outlet joint 4 with the fixing sleeve 9, and the inner sealing ring 7 between them plays a sealing role.

[0037] Step three: place the outer sealing ring 8 on the sealing surface of the gas outlet joint 4, and then insert the whole into the metal outer tube 1, so that the rear cover structure 102 of the metal outer tube 1 is sealed with the gas outlet joint 4 by the outer sealing ring 8, and pay attention to keep the glass inner tube 2 centered.

[0038] Step four: clamp the locking nut 10 on the gas outlet joint 4 and threadedly connect it with the rear cover structure 102, and pay attention to keep the position of the outer sealing ring 8 correct when tightening, and do not twist.

[0039] Step five: place the inner seal ring 7 and outer seal ring 8 in front of the reactor, and screw the gas inlet joint 3 with the front cover structure 101 of the metal outer tube 1. (When used in high pressure state, pay attention to remove the inner seal ring 7, and replace with inert gas before introducing the reaction gas for catalytic reaction)

[0040] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A novel tubular thermal catalytic reactor characterized in that: It comprises a metal outer tube (1), a glass inner tube (2), an air inlet joint (3) and an air outlet joint (4), the glass inner tube (2) is inserted into the metal outer tube (1) and a gap (5) is left between the two, the air inlet joint (3) is in airtight connection with the front end of the metal outer tube (1), an air passage (6) is arranged between the air inlet joint (3) and the front end of the glass inner tube (2) and communicates with the gap (5), an inner sealing ring (7) is arranged in the air passage (6), and the air outlet joint (4) is in airtight connection with the rear end of the metal outer tube (1) and the rear end of the glass inner tube (2) respectively.

2. A novel tubular thermal catalytic reactor as claimed in claim 1, wherein: The front end of the metal outer tube (1) is provided with a front cover structure (101), and the rear end of the metal outer tube (1) is provided with a rear cover structure (102).

3. A novel tubular thermal catalytic reactor as claimed in claim 2, wherein: An outer sealing ring (8) is arranged between the air inlet joint (3) and the front cover structure (101), and the outer sealing ring (8) is also arranged between the air outlet joint (4) and the rear cover structure (102).

4. A novel tubular thermal catalytic reactor as claimed in claim 3, wherein: The inner sealing ring (7) is also arranged between the air outlet joint (4) and the rear end of the glass inner tube (2).

5. A novel tubular thermal catalytic reactor as claimed in claim 4, wherein: The air inlet joint (3) is in threaded connection with the front cover structure (101).

6. A novel tubular thermocatalytic reactor according to any one of claims 2-5, characterized in that: A fixing sleeve (9) is further arranged, the fixing sleeve (9) is sleeved on the rear end of the glass inner tube (2), and the air outlet joint (4) is in threaded connection with the fixing sleeve (9).

7. A novel tubular thermal catalytic reactor as claimed in claim 6, wherein: A locking nut (10) is further arranged, the locking nut (10) is clamped on the air outlet joint (4) and is in threaded connection with the rear cover structure (102).

8. A novel tubular thermal catalytic reactor as claimed in claim 1, wherein: The glass inner tube (2) is made of quartz glass.

9. A novel tubular thermal catalytic reactor as claimed in claim 1, wherein: The metal outer tube (1) is made of stainless steel.

10. A novel tubular thermal catalytic reactor as claimed in claim 4, wherein: The inner sealing ring (7) and the outer sealing ring (8) are both made of perfluorinated rubber.

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