Propane dehydrogenation reactor

Abstract

The utility model discloses a propane dehydrogenation reactor which comprises a hollow ceramic inner cylinder body, a metal outer cylinder body sleeved on the outer side of the ceramic inner cylinder body by adopting a gap, inlet and outlet connectors arranged at the end parts of the ceramic inner cylinder body in a one-to-one correspondence manner, and sealing pressing caps sleeved on the outer sides of the inlet and outlet connectors, the sealing pressing cap, the inlet and outlet connector and the metal outer cylinder are sleeved with the connecting sleeve, the ceramic inner cylinder, the inlet and outlet connector and the sealing pressing cap are fixed through the connecting sleeve, and a gap between the ceramic inner cylinder and the metal outer cylinder is filled with the quartz powder. And the inner side of the inlet and outlet connector is arranged in the ceramic inner cylinder body. By means of the scheme, the propane dehydrogenation device has the advantages of being simple in structure, reliable in connection and the like, and has high practical value and popularization value in the technical field of propane dehydrogenation.

Description

Technical Field

[0001] The utility model relates to the technical field of propane dehydrogenation, in particular to a propane dehydrogenation reactor. Background Art

[0002] The propane dehydrogenation process is to dehydrogenate propane to obtain propylene, and its reaction formula is: C3H8→C3H6+H2. At present, the mainstream propane dehydrogenation processes include thermal cracking dehydrogenation and catalytic dehydrogenation. Among them, thermal cracking dehydrogenation is the interruption of CC and CH to produce ethylene and propylene. Its temperature is 800-920℃, and the conversion rate is about 93%. The proportion of ethylene in the obtained product is about 42%, and the proportion of propylene is about 17%. In addition, the temperature of catalytic dehydrogenation is 590-630℃, and the single-pass conversion rate is 33%-44%.

[0003] For example, the Chinese invention patent "Patent Publication Number: CN117582892A, Name: A Dehydrogenation Reactor Internal Part for a Propane Dehydrogenation Device" includes a reactor mechanism and a reaction tube mechanism arranged inside the reactor mechanism, and a catalyst tube mechanism is also arranged inside the reactor mechanism; the catalyst tube mechanism includes a catalyst tube body; a first buffer mechanism is arranged at the upper end of the catalyst tube mechanism, and the first buffer mechanism includes a sliding sleeve slidably mounted on the upper end of the catalyst tube body, and a first damping member fixedly mounted on the lower end of the sliding sleeve, and the first damping member is slidably mounted in the catalyst tube body.

[0004] Another example is the Chinese invention patent with the patent publication number: CN117582897A, entitled: A Large-Scale Propane Dehydrogenation Reactor for Propylene, which includes a kettle body and a mixing mechanism arranged inside the kettle body, wherein the mixing mechanism includes: a working component, wherein the working component is located at one end of the kettle body; a mixing component, wherein the mixing component includes a screw, and by arranging a spreading box and a mixing plate, the screw rotates through a spreading slider to drive the spreading box to slide along the outer wall of the reaction bed, so that the catalyst inside the spreading box falls onto the reaction bed through the spreading net.

[0005] The above technology adopts a catalytic dehydrogenation process, which has a relatively complex structure and requires the installation of corresponding components for catalyst addition and reaction.

[0006] In addition, in the Chinese invention patent "Patent Publication No.: CN114307866A, Name: A Novel Reaction System for Propane Dehydrogenation Device", the fresh propane raw material is first preheated by at least three parallel feed and discharge heat exchangers E-101A, E-101B, and E-101C, and the preheated raw gas is reheated by the heating furnace H-101; the obtained high-temperature raw gas is sent to the axial-radial propane dehydrogenation reactor R-101A and the axial-radial propane dehydrogenation reactor R-101B; the high-temperature reaction gas at the outlet of the axial-radial propane dehydrogenation reactor R-101A is mixed with the reduction purge steam of the axial-radial propane dehydrogenation reactor R-101B, and then enters the feed and discharge heat exchangers E-101A, E-101B, and E-101C to directly preheat the raw gas, and the obtained product gas is sent to the separation and recovery system. Although it explains the propane dehydrogenation reaction, it does not disclose its internal structure.

[0007] Therefore, there is an urgent need to provide a propane dehydrogenation reactor with a simple structure and reliable connection. Utility Model Content

[0008] In view of the above problems, the purpose of the present invention is to provide a propane dehydrogenation reactor. The technical solution adopted by the present invention is as follows:

[0009] A propane dehydrogenation reactor comprises a hollow ceramic inner cylinder, a metal outer cylinder which is sleeved on the outer side of the ceramic inner cylinder with a gap, inlet and outlet connectors which are arranged one by one at the ends of the ceramic inner cylinder, a sealing pressure cap which is sleeved on the outer side of the inlet and outlet connectors, a connecting sleeve which is sleeved on the sealing pressure cap, the inlet and outlet connectors and the metal outer cylinder and fixes the ceramic inner cylinder, the inlet and outlet connectors and the sealing pressure cap, and quartz powder which fills the gap between the ceramic inner cylinder and the metal outer cylinder; the inner side of the inlet and outlet connectors is placed in the ceramic inner cylinder.

[0010] Furthermore, a sealing gasket is arranged on the inner side of the connecting sleeve; the inner side of the sealing gasket is sleeved on the outer edge of the end of the ceramic inner cylinder.

[0011] Furthermore, a port pad is provided at the end of the ceramic inner cylinder; the port pad is squeezed between the inlet and outlet connector and the ceramic inner cylinder.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] (1) The utility model provides a metal outer cylinder to protect the ceramic inner cylinder, thereby extending the high-temperature durability of the ceramic inner cylinder. In addition, quartz powder is added between the metal outer cylinder and the ceramic inner cylinder to achieve heat transfer, which not only extends the high-temperature durability, but also ensures the reliability of heat transfer, and at the same time meets the heat transfer requirements of the ceramic inner cylinder and the metal outer cylinder due to thermal expansion and contraction.

[0014] (2) The utility model ensures the reliability of the sealing connection between the ceramic inner cylinder and the metal outer cylinder by arranging a sealing gasket, a port gasket, a sealing pressure cap and a connecting sleeve.

[0015] In summary, the utility model has the advantages of simple structure, reliable connection, etc., and has high practical value and promotion value in the field of propane dehydrogenation technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope of protection. For those skilled in the art, other relevant drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a cross-sectional schematic diagram of the utility model.

[0018] In the above drawings, the component names corresponding to the reference numerals are as follows:

[0019] 1. Ceramic inner cylinder; 2. Metal outer cylinder; 3. Connecting sleeve; 4. Sealing gasket; 5. Port gasket; 6. Inlet and outlet connectors; 7. Sealing cap. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of this application clearer, the utility model is further described below in conjunction with the accompanying drawings and embodiments, and the implementation methods of this utility model include but are not limited to the following embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0021] In this embodiment, the term "and / or" is merely a term used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0022] The terms "first" and "second" in the description and claims of this embodiment are used to distinguish different objects rather than to describe a specific order of objects. For example, a first target object and a second target object are used to distinguish different target objects rather than to describe a specific order of target objects.

[0023] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0024] In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more than two. For example, multiple processing units refer to two or more processing units; multiple systems refer to two or more systems.

[0025] like Figure 1 As shown, this embodiment provides a propane dehydrogenation reactor, which is used to dehydrogenate propane to obtain propylene and hydrogen, and is suitable for thermal cracking dehydrogenation process.

[0026] Specifically, the propane dehydrogenation reactor includes a hollow ceramic inner cylinder 1, a metal outer cylinder 2 which is gap-sleeved on the outside of the ceramic inner cylinder 1, inlet and outlet connectors 6 which are arranged one by one at the ends of the ceramic inner cylinder 1, a sealing pressure cap 7 which is sleeved on the outside of the inlet and outlet connector 6, a connecting sleeve 3 which is sleeved on the sealing pressure cap 7, the inlet and outlet connector 6 and the metal outer cylinder 2 and fixes the ceramic inner cylinder 1, the inlet and outlet connector 6 and the sealing pressure cap 7, and quartz powder which fills the gap between the ceramic inner cylinder 1 and the metal outer cylinder 2.

[0027] The inner side of the inlet and outlet connector 6 is placed in the ceramic inner cylinder 1, and a port pad 5 is provided at the end of the ceramic inner cylinder 1, and the port pad 5 is squeezed between the inlet and outlet connector 6 and the ceramic inner cylinder 1. In addition, a sealing gasket 4 is provided on the inner side of the connection sleeve 3, and the inner side of the sealing gasket 4 is sleeved on the outer edge of the end of the ceramic inner cylinder 1. In this way, a sealed connection can be achieved.

[0028] When in use, propane to be dehydrogenated is introduced from the inlet and outlet connector 6 to heat the metal outer cylinder 2, and the quartz powder is used to transfer the heat to the ceramic inner cylinder 1. In the ceramic inner cylinder 1, the propane to be dehydrogenated is thermally cracked and dehydrogenated.

[0029] The above embodiments are only preferred embodiments of the present utility model and are not intended to limit the protection scope of the present utility model. Any changes that adopt the design principles of the present utility model and are made through non-creative labor on this basis should fall within the protection scope of the present utility model.

Claims

1. A propane dehydrogenation reactor, characterized in that: The invention comprises a hollow ceramic inner cylinder (1), a metal outer cylinder (2) sleeved on the outer side of the ceramic inner cylinder (1) with a gap, inlet and outlet connectors (6) arranged one by one at the ends of the ceramic inner cylinder (1), a sealing pressure cap (7) sleeved on the outer side of the inlet and outlet connectors (6), a connecting sleeve (3) sleeved on the sealing pressure cap (7), the inlet and outlet connector (6) and the metal outer cylinder (2) and fixing the ceramic inner cylinder (1), the inlet and outlet connector (6) and the sealing pressure cap (7), and quartz powder filled in the gap between the ceramic inner cylinder (1) and the metal outer cylinder (2); the inner side of the inlet and outlet connector (6) is placed in the ceramic inner cylinder (1).

2. A propane dehydrogenation reactor according to claim 1, characterized in that: A sealing gasket (4) is arranged on the inner side of the connecting sleeve (3); the inner side of the sealing gasket (4) is sleeved on the outer edge of the end of the ceramic inner cylinder (1).

3. A propane dehydrogenation reactor according to claim 1 or 2, characterized in that: A port pad (5) is provided at the end of the ceramic inner cylinder (1); the port pad (5) is squeezed between the inlet and outlet connector (6) and the ceramic inner cylinder (1).

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