Cold hydrogen port structure and hydrogenation reactor

Abstract

The utility model belongs to the technical field of petrochemical engineering, and discloses a cold hydrogen port structure and a hydrogenation reactor. The cold hydrogen port structure is arranged at a hydrogen injection port of the hydrogenation reactor and comprises an outer sleeve, a hydrogen injection pipe and an inner partition plate, and the outer sleeve is fixedly arranged in the hydrogen injection port; the hydrogen injection pipe is arranged in the outer sleeve in a penetrating mode and used for injecting hydrogen into the hydrogenation reactor, and a first heat insulation cavity is formed between the outer sleeve and the hydrogen injection pipe; the inner partition plate is annularly arranged at the end, close to the hydrogen injection opening, of the hydrogen injection pipe, and a second heat insulation cavity is formed between the inner partition plate and the inner wall face of the hydrogenation reactor. According to the hydrogenation reactor, the situation that local area temperature distribution is not uniform due to the influence of low-temperature hydrogen on the hydrogenation reactor and the outer sleeve can be avoided, and it is ensured that the hydrogenation reactor can operate safely and stably for a long period; meanwhile, the hydrogen injection pipe does not need to stretch into the deep interior of the hydrogenation reactor, and abrasion and blockage of solid particles such as coke powder and a catalyst to the hydrogen injection pipe are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical industry, in particular to a cold hydrogen port structure and a hydrogenation reactor. Background Art

[0002] The hydrogenation reactor is a commonly used equipment in the petrochemical field. It can not only be used as a container for hydrogenation reactions, but also can be used in situations where liquids and gases need to be fully mixed. It is often used to hydrogenate residual oil in the petroleum industry into light oil, thereby producing gasoline, diesel and other fuels.

[0003] The existing method of injecting hydrogen into a hydrogenation reactor is to connect an insertable pipe to the hydrogen injection port, and the pipe extends into the interior of the hydrogenation reactor to facilitate the injection of hydrogen. However, since the medium for the hydrogenation reaction contains solid particles such as coke powder and catalyst, these solid particles cause serious wear on the insertable pipe and there is a risk of blocking the pipe. Utility Model Content

[0004] The utility model aims to provide a cold hydrogen port structure and a hydrogenation reactor, which can avoid the situation that the hydrogenation reactor is affected by low-temperature hydrogen and has uneven temperature distribution in local areas, so as to ensure long-term, safe and stable operation.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a cold hydrogen port structure, which is arranged at the hydrogen injection port of a hydrogenation reactor, and comprises:

[0007] An outer sleeve, the outer sleeve being fixedly disposed in the hydrogen injection port;

[0008] A hydrogen injection pipe, the hydrogen injection pipe is inserted into the outer sleeve, the hydrogen injection pipe is used to inject hydrogen into the hydrogenation reactor, and a first insulation cavity is provided between the outer sleeve and the hydrogen injection pipe;

[0009] An inner baffle is arranged on the end of the hydrogen injection pipe close to the hydrogen injection port, and a second insulation cavity is provided between the inner baffle and the inner wall surface of the hydrogenation reactor.

[0010] Preferably, the first insulation cavity and the second insulation cavity are both filled with insulation refractory materials.

[0011] Preferably, the plane where the port of the hydrogen injection pipe is located is flush with the inner wall surface of the hydrogenation reactor.

[0012] Preferably, the inner partition includes a first partition and a second partition connected vertically;

[0013] The first baffle is arranged at the end of the hydrogen injection tube along the circumference of the hydrogen injection tube, and the first baffle extends along the length direction of the hydrogen injection tube. The second baffle is arranged on the first baffle, and the second baffle extends along the radial direction of the hydrogen injection tube.

[0014] Preferably, the first partition is connected to the hydrogen injection pipe by welding, and the second partition is connected to the inner wall surface of the hydrogenation reactor by welding.

[0015] Preferably, the first insulation cavity is communicated with the second insulation cavity.

[0016] Preferably, the outer sleeve is connected to the hydrogen injection port by welding.

[0017] The hydrogenation reactor comprises the above-mentioned cold hydrogen port structure.

[0018] The beneficial effects of the utility model are:

[0019] The cold hydrogen port structure provided by the utility model has an outer sleeve fixedly arranged in the hydrogen injection port, and the hydrogen injection pipe is passed through the outer sleeve, so that the hydrogen injection pipe can inject hydrogen into the hydrogenation reactor so that the hydrogenation reactor can carry out a normal hydrogenation reaction, and the outer sleeve increases the contact area between the hydrogenation reactor and the hydrogen injection pipe, thereby fixing and protecting the hydrogen injection pipe; an inner partition is arranged at the end of the hydrogen injection pipe close to the hydrogen injection port, and since a first insulation cavity is provided between the outer sleeve and the hydrogen injection pipe, and a second insulation cavity is provided between the inner partition and the inner wall surface of the hydrogenation reactor, when low-temperature hydrogen is injected into the hydrogenation reactor through the hydrogen injection pipe, the first insulation cavity and the second insulation cavity can play a role of heat preservation and heat insulation, thereby preventing the hydrogenation reactor and the outer sleeve from having uneven temperature distribution in local areas due to the influence of low-temperature hydrogen, thereby avoiding the occurrence of temperature difference stress and damaging the hydrogenation reactor, and ensuring that the hydrogenation reactor can operate safely and stably for a long period of time.

[0020] The hydrogenation reactor provided by the utility model adopts the above-mentioned cold hydrogen port structure, which can avoid the situation where the hydrogenation reactor and the outer sleeve are affected by low-temperature hydrogen and have uneven temperature distribution in local areas, thereby ensuring that the hydrogenation reactor can operate safely and stably for a long period of time; at the same time, the hydrogen injection pipe does not need to extend into the deeper interior of the hydrogenation reactor, thereby avoiding the wear and blockage of the hydrogen injection pipe by solid particles such as coke powder and catalyst. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional view of a cold hydrogen port structure provided by a specific embodiment of the utility model;

[0022] Figure 2 It is a cross-sectional view of another cold hydrogen port structure provided by a specific implementation manner of the utility model.

[0023] In the figure:

[0024] 100-flange structure;

[0025] 1-Outer sleeve;

[0026] 2-Hydrogen injection pipe;

[0027] 3-inner partition; 31-first partition; 32-second partition;

[0028] 4- Thermal insulation refractory materials. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0033] like Figure 1and Figure 2 As shown, the utility model provides a cold hydrogen port structure, which is arranged at the hydrogen injection port of the hydrogenation reactor, and includes an outer sleeve 1, a hydrogen injection pipe 2 and an inner partition 3. The outer sleeve 1 is fixedly arranged in the hydrogen injection port; the hydrogen injection pipe 2 is passed through the outer sleeve 1, and the hydrogen injection pipe 2 is used to inject hydrogen into the hydrogenation reactor, and a first insulation cavity is provided between the outer sleeve 1 and the hydrogen injection pipe 2; the inner partition 3 is arranged on the end of the hydrogen injection pipe 2 close to the hydrogen injection port, and a second insulation cavity is provided between the inner partition 3 and the inner wall surface of the hydrogenation reactor. In this embodiment, since the outer sleeve 1 is fixedly arranged in the hydrogen injection port and the hydrogen injection pipe 2 is passed through the outer sleeve 1, the hydrogen injection pipe 2 can inject hydrogen into the hydrogenation reactor so that the hydrogenation reactor can carry out a normal hydrogenation reaction, and the outer sleeve 1 can increase the contact area between the hydrogenation reactor and the hydrogen injection pipe 2, thereby fixing and protecting the hydrogen injection pipe 2; an inner partition 3 is arranged at the end of the hydrogen injection pipe 2 near the hydrogen injection port, and since there is a first insulation cavity between the outer sleeve 1 and the hydrogen injection pipe 2, and a second insulation cavity is provided between the inner partition 3 and the inner wall surface of the hydrogenation reactor, when low-temperature hydrogen is injected into the hydrogenation reactor through the hydrogen injection pipe 2, the air in the first insulation cavity and the second insulation cavity can play a role in heat preservation and insulation, preventing the hydrogenation reactor and the outer sleeve 1 from being affected by the low-temperature hydrogen and having uneven temperature distribution in local areas, thereby avoiding the occurrence of temperature difference stress and damaging the hydrogenation reactor, and ensuring that the hydrogenation reactor can operate safely and stably for a long period of time. Specifically, a hydrogen injection port for injecting hydrogen is provided on the wall of the hydrogenation reactor, an outer sleeve 1 is arranged in the hydrogen injection port, a hydrogen injection pipe 2 is passed through the outer sleeve 1, a port of the hydrogen injection pipe 2 extends into the hydrogenation reactor and the port can be close to the hydrogen injection port, and there is no need to extend into the deeper interior of the hydrogenation reactor, thereby avoiding wear and blockage of the hydrogen injection pipe 2 by solid particles such as coke powder and catalyst; a flange structure 100 is provided on the other end of the hydrogen injection pipe 2, and the flange structure 100 is used to connect an external hydrogen delivery pipeline to the hydrogen injection pipe 2.

[0034] Furthermore, if Figure 1 and Figure 2 As shown, the first insulation cavity and the second insulation cavity are filled with insulation refractory material 4. In this embodiment, the insulation refractory material 4 can be a ceramic fiber product, or can be a material such as aluminum silicate or rock wool, which can effectively block heat transfer and also has good high temperature resistance.

[0035] Furthermore, if Figure 2 As shown, the plane where the end of the hydrogen injection pipe 2 is located is flush with the inner wall surface of the hydrogenation reactor. In this embodiment, the hydrogen injection pipe 2 is inserted into the outer sleeve 1 and the plane where the end of the hydrogen injection pipe 2 is located is flush with the inner wall surface of the hydrogenation reactor, thereby minimizing the wear or blockage of the hydrogen injection pipe 2 by solid particles inside the hydrogenation reactor. Specifically, as Figure 2As shown, the inner partition 3 includes a first partition 31 and a second partition 32 connected vertically; the first partition 31 is arranged at the end of the hydrogen injection tube 2 along the circumference of the hydrogen injection tube 2, and the first partition 31 extends along the length direction of the hydrogen injection tube 2, and the second partition 32 is arranged on the first partition 31, and the second partition 32 extends along the radial direction of the hydrogen injection tube 2. In this embodiment, the first partition 31 is a cylindrical structure, the second partition 32 is an annular structure, the outer diameter of the first partition 31 is the same as the inner diameter of the second partition 32, the first partition 31 and the second partition 32 are an integrated structure, and the first partition 31 extends along the length direction of the hydrogen injection tube 2, so that there is a gap between the second partition 32 and the inner wall surface of the hydrogenation reactor to be filled with the heat-insulating refractory material 4. The first partition 31 is welded to the hydrogen injection tube 2, and the second partition 32 is welded to the inner wall surface of the hydrogenation reactor. In this embodiment, the second partition 32 is welded to the inner wall surface of the hydrogenation reactor, and the weld seals the insulating refractory material 4 tightly in the second insulating cavity along the circumference of the second partition 32, thereby preventing solid particles in the hydrogenation reactor from contaminating the insulating refractory material 4 and affecting the performance of the insulating refractory material 4.

[0036] In another embodiment, if Figure 1 As shown, the port of the hydrogen injection pipe 2 protrudes from the inner wall surface of the hydrogenation reactor in the direction close to the inside of the hydrogenation reactor, that is, the plane where the port of the hydrogen injection pipe 2 is located is not flush with the inner wall surface of the hydrogenation reactor; at this time, the inner partition 3 is an annular structure as a whole, the inner peripheral surface of the inner partition 3 is welded to the outer wall of the hydrogenation pipe 2, and the outer peripheral surface of the inner partition 3 is welded to the inner wall surface of the hydrogenation reactor, and the weld seals the insulating refractory material 4 in the second insulating cavity along the circumference of the inner partition 3, thereby preventing the solid particles in the hydrogenation reactor from polluting the insulating refractory material 4 and affecting the performance of the insulating refractory material 4. It can be understood that in this embodiment, the installer does not need to laboriously align the plane where the port of the hydrogen injection pipe 2 is located with the inner wall surface of the hydrogenation reactor, and can also avoid the solid particles inside the hydrogenation reactor from causing wear or blockage to the hydrogen injection pipe 2 to a certain extent.

[0037] Furthermore, if Figure 1 and Figure 2 As shown, the first heat insulation cavity is connected to the second heat insulation cavity. In this embodiment, the first heat insulation cavity is connected to the second heat insulation cavity, and no partition structure is required, which reduces the manufacturing cost and manufacturing difficulty.

[0038] Furthermore, if Figure 1 and Figure 2As shown, the outer sleeve 1 is welded and connected in the hydrogen injection port. In this embodiment, the outer sleeve 1 is matched with the hydrogen injection port and installed in the hydrogen injection port and connected by welding. The inner diameter of the outer sleeve 1 is larger than the outer diameter of the hydrogen injection pipe 2. The annular space between the outer sleeve 1 and the hydrogen injection pipe 2 is the first insulation cavity, which is evenly filled with insulation refractory material 4. The outer sleeve 1 is firmly connected to the hydrogenation reactor, and the hydrogen injection pipe 2 is inserted into the outer sleeve 1, so that the outer sleeve 1 can effectively support and fix the hydrogen injection pipe 2, and at the same time strengthen the structural strength of the hydrogen injection port on the hydrogenation reactor.

[0039] The utility model also provides a hydrogenation reactor, which includes the above-mentioned cold hydrogen port structure. The hydrogenation reactor is provided with an inner partition plate 3 on the hydrogenation reactor's hydrogenation pipe 2, and a second heat-insulating cavity is provided between the inner partition plate 3 and the inner wall surface of the hydrogenation reactor. At the same time, a first heat-insulating cavity is provided between the hydrogenation pipe 2 and the outer sleeve 1. The first heat-insulating cavity and the second heat-insulating cavity can play a role in heat preservation and heat insulation, preventing the hydrogenation reactor and the outer sleeve 1 from having uneven temperature distribution in local areas due to the influence of low-temperature hydrogen in the hydrogenation pipe 2, so as to reduce the stress level of the hydrogenation reactor cylinder, so that the hydrogenation pipe 2 does not need to extend into the deeper interior of the hydrogenation reactor, and avoids the wear and blockage of the hydrogenation pipe 2 by solid particles such as coke powder and catalyst.

[0040] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A cold hydrogen port structure, arranged at the hydrogen injection port of the hydrogenation reactor, characterized in that: include: An outer sleeve (1), the outer sleeve (1) being fixedly arranged in the hydrogen injection port; A hydrogen injection pipe (2), the hydrogen injection pipe (2) being inserted into the outer sleeve (1), the hydrogen injection pipe (2) being used to inject hydrogen into the hydrogenation reactor, and a first heat-insulating cavity being provided between the outer sleeve (1) and the hydrogen injection pipe (2); An inner baffle (3), the inner baffle (3) is arranged around the end of the hydrogen injection pipe (2) close to the hydrogen injection port, and a second insulation cavity is provided between the inner baffle (3) and the inner wall surface of the hydrogenation reactor.

2. The cold hydrogen port structure according to claim 1, characterized in that: The first heat-insulating cavity and the second heat-insulating cavity are both filled with heat-insulating refractory material (4).

3. The cold hydrogen port structure according to claim 1, characterized in that: The plane where the port of the hydrogen injection pipe (2) is located is flush with the inner wall surface of the hydrogenation reactor.

4. The cold hydrogen port structure according to claim 3, characterized in that: The inner partition (3) comprises a first partition (31) and a second partition (32) which are vertically connected; The first partition plate (31) is arranged at the end of the hydrogen injection tube (2) along the circumference of the hydrogen injection tube (2), and the first partition plate (31) extends along the length direction of the hydrogen injection tube (2). The second partition plate (32) is arranged on the first partition plate (31), and the second partition plate (32) extends along the radial direction of the hydrogen injection tube (2).

5. The cold hydrogen port structure according to claim 4, characterized in that: The first partition plate (31) is connected to the hydrogen injection pipe (2) by welding, and the second partition plate (32) is connected to the inner wall surface of the hydrogenation reactor by welding.

6. The cold hydrogen port structure according to claim 1, characterized in that: The first heat-insulating cavity is communicated with the second heat-insulating cavity.

7. The cold hydrogen port structure according to claim 1, characterized in that: The outer sleeve (1) is welded and connected to the hydrogen injection port.

8. A hydrogenation reactor, characterized in that It comprises the cold hydrogen port structure as described in any one of claims 1 to 7.

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