Lower end socket filter screen for nonene reactor, nonene reactor and application of lower end socket filter screen

Abstract

The invention discloses a lower end socket filter screen for a nonene reactor, the nonene reactor and application of the lower end socket filter screen and relates to the technical field of petrochemical engineering, the upper portion of the lower end socket filter screen is of a conical structure with the narrow upper portion and the wide lower portion, the side wall of the conical structure is a closed smooth inclined face, and the lower portion of the lower end socket filter screen is of a columnar structure. The side wall and the bottom of the columnar structure are each of a filter screen structure, a through hole is formed in the bottom of the columnar structure, and the through hole is downwards connected with a drainage pipe. The lower sealing head filter screen is additionally arranged in the lower sealing head of the nonene reactor, the lower sealing head filter screen is cleaned when the nonene reactor is switched every three months, an operator does not need to frequently clean the valve A any more, and it is guaranteed that the heat transfer effect and pressure drop of a downstream heat exchanger meet the process requirements.

Description

Technical Field

[0001] The invention relates to the technical field of petrochemical industry, and more particularly to a bottom head filter screen for a nonene reactor, a nonene reactor and applications thereof. Background Art

[0002] In the current nonene reaction process (such as Figure 1 ), the nonene reaction product flows out of the reactor, and after heat exchange in the heat exchanger, it goes to the downstream coalescer for oil-water separation. The separated water phase enters the water cut tank, and the oil phase enters the separation unit for distillation. Among them, the catalyst in the nonene reactor is solid particles. After long-term operation of the equipment, the catalyst will break and drop residues, causing blockage of the downstream heat exchanger and coalescer, especially the water cut regulating valve of the water phase of the coalescer (i.e. Figure 1 Valve A) in the heat exchanger is often blocked, and operators need to clean it frequently during the production and operation of the device. In addition, the aqueous medium contains a large amount of phosphoric acid, which is irritating and corrosive to the skin and eyes, and is not conducive to safe production. In addition, when the residue accumulates to a certain extent, the heat transfer effect of the heat exchanger will deteriorate, the pressure drop will increase, and it will not meet the process requirements. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a lower head filter for a nonene reactor, a nonene reactor and applications thereof. The present invention adds a lower head filter to the lower head of the nonene reactor, and cleans the lower head filter when the nonene reactor is switched every three months. The operator no longer needs to clean valve A frequently, thereby ensuring that the heat transfer effect and pressure drop of the downstream heat exchanger meet the process requirements.

[0004] One of the purposes of the present invention is to provide a bottom head filter screen for a nonene reactor.

[0005] The upper part of the lower head filter for the nonene reactor described in the present invention is a conical structure that is narrow at the top and wide at the bottom, and the side wall of the conical structure is a closed smooth inclined surface. The lower part of the lower head filter is a columnar structure, and the side wall and bottom of the columnar structure are both filter structures. A through hole is provided at the bottom of the columnar structure, and a drainage pipe is connected downward to the through hole.

[0006] Preferably,

[0007] The bottom edge of the conical structure is consistent in shape with the top edge of the columnar structure and is connected; and / or,

[0008] The conical structure is a cone or a frustum; preferably, a cone, a pyramid, a truncated cone or a prism; and / or,

[0009] The columnar structure is a cylinder or a prism; and / or,

[0010] The slope angle of the smooth inclined surface is greater than or equal to the sliding angle of the catalyst for the nonene reaction, and the sliding angle is related to the properties of the catalyst itself, such as: water content, particle shape, particle surface smoothness, etc. After research and analysis by the inventor, this slope angle is preferably 40° to 55°.

[0011] Preferably,

[0012] The filter structure is a wire mesh, and / or the mesh number of the filter structure is 100 to 800 meshes, preferably 200 to 800 meshes, and more preferably 800 meshes.

[0013] Preferably,

[0014] The nominal diameter of the draft tube matches the material outlet of the nonene reactor; and / or,

[0015] The height of the drainage pipe depends on the height of the residue accumulation in a switching cycle, plus a certain margin to ensure the area of ​​the flow region, preferably 500mm to 800mm.

[0016] Preferably,

[0017] The bottom diameter of the conical structure is determined by the filtration accuracy and the medium flow rate, preferably 800-1200 mm (DN800-DN1200), more preferably 1000 mm;

[0018] Preferably, when the cone-shaped structure is a pyramid or a prism, the bottom area of ​​the cone-shaped structure is 0.5 m 2 ~1.2m 2 .

[0019] Preferably,

[0020] The lower head filter is made of 321 stainless steel or titanium alloy, which can ensure the corrosion resistance of the reaction system.

[0021] Preferably,

[0022] The total height of the lower head filter screen (including the drainage pipe) is 1300mm-1700mm; and / or,

[0023] The height of the columnar structure is 200-400 mm, preferably 300 mm; the higher the height of the columnar structure, the larger the filtering area of ​​the filter structure, the better the filtering effect, and the service life of the filter structure can be extended. However, since the lower head filter is in the lower head of the reactor and the space is limited, the columnar structure should not be too high.

[0024] A second object of the present invention is to provide a nonene reactor.

[0025] The lower head filter screen is installed in the lower head of the nonene reactor described in the present invention, a material outlet is arranged at the bottom of the lower head of the nonene reactor, and the drainage pipe of the lower head filter screen is arranged above the material outlet at the bottom of the nonene reactor and is connected with the material outlet.

[0026] Preferably,

[0027] The nonene reactor is provided with a discharge port at the bottom; preferably,

[0028] The discharge port is arranged beside the material outlet; and / or

[0029] The nominal diameter of the discharge port depends on the operation requirements, and is preferably 150-250 mm (DN150-DN250), preferably 150 mm, to facilitate the discharge and replacement of the catalyst.

[0030] A third object of the present invention is to provide an application of a nonene reactor in a nonene preparation process.

[0031] The present invention adds a lower head filter at the lower head of the nonene reactor. The upper part of the lower head filter structure is a smooth plane with a certain slope, which is convenient for the top catalyst residue to fall to the bottom, avoids the residue accumulation in the flow area to cause blockage, and reduces the cleaning frequency of the lower head filter.

[0032] The present invention collects the residue dropped during the long-term operation of the nonene reactor, so that the residue is concentrated in the lower part of the lower head of the reactor and the filter screen structure of the lower head, which is convenient for the operator to perform a one-time cleaning when the reactor is switched, and avoids frequent cleaning of the water-phase shear regulating valve A of the coalescer during the production operation of the device. In addition, the medium of the downstream heat exchanger can be made cleaner, and the fouling coefficient can be reduced when designing the heat exchanger, the heat transfer coefficient becomes larger, the heat exchange area is reduced, and the floor space of the heat exchanger is reduced, thereby saving space; after the reaction product passes through the filter screen of the lower head, the abrasiveness of the medium is greatly reduced, and the abrasion of the internal parts of the coalescer is reduced, which is beneficial to prolonging the life of the internal parts of the coalescer. In summary, the filter screen of the lower head of the present invention helps to meet process requirements and improve the stability of the operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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.

[0034] Figure 1 This is a process flow chart of nonene reaction;

[0035] Figure 2 It is a cross-sectional view of the lower head of the nonene reactor of Examples 1 and 2 along the AA direction;

[0036] Figure 3 It is a cross-sectional view of the lower end cap of the nonene reactor of Example 3 taken along the AA direction;

[0037] Among them, 1-nonene reactor, 2-lower head filter, 3-drainage pipe, 4-material outlet, 5-discharge port, 6-conical structure, 7-columnar structure (filter structure). DETAILED DESCRIPTION

[0038] like Figure 1 In the current nonene reaction process shown in the figure, the nonene reaction product flows out of the reactor, and after heat exchange in the heat exchanger, it goes to the downstream coalescer for oil-water separation. The separated water phase enters the water cut tank, and the oil phase enters the separation unit for distillation. Figure 2 and Figure 3 As shown, the upper part of the lower head filter for the nonene reactor described in the present invention is a conical structure that is narrow at the top and wide at the bottom, and the side wall of the conical structure is a closed smooth inclined surface. The lower part of the lower head filter is a columnar structure, and the side wall and bottom of the columnar structure are both filter structures. A through hole is provided at the bottom of the columnar structure, and a drainage pipe is connected downwardly to the through hole.

[0039] As a preferred embodiment of the present invention,

[0040] The bottom edge of the cone-shaped structure is consistent in shape with the top edge of the columnar structure and is connected;

[0041] The conical structure is a cone or a frustum; preferably, a cone, a pyramid, a truncated cone or a prism;

[0042] The columnar structure is a cylinder or a prism;

[0043] The slope angle of the smooth inclined surface is greater than or equal to the sliding angle of the catalyst for the nonene reaction, and the sliding angle is related to the properties of the catalyst itself, such as: water content, particle shape, particle surface smoothness, etc. After research and analysis by the inventor, this slope angle is preferably 40° to 55°.

[0044] As a preferred embodiment of the present invention,

[0045] The filter structure is a wire mesh, and / or the mesh number of the filter structure is 100 to 800 meshes, preferably 200 to 800 meshes, and more preferably 800 meshes.

[0046] As a preferred embodiment of the present invention,

[0047] The nominal diameter of the draft tube matches the material outlet of the nonene reactor;

[0048] The height of the drainage pipe depends on the height of the residue accumulation in a switching cycle, plus a certain margin to ensure the area of ​​the flow region, preferably 500mm to 800mm.

[0049] As a preferred embodiment of the present invention,

[0050] The bottom diameter of the conical structure is determined by the filtration accuracy and the medium flow rate, preferably 800-1200 mm (DN800-DN1200), more preferably 1000 mm;

[0051] Preferably, when the cone-shaped structure is a pyramid or a prism, the bottom area of ​​the cone-shaped structure is 0.5 m 2 ~1.2m 2 .

[0052] As a preferred embodiment of the present invention,

[0053] The lower head filter is made of 321 stainless steel or titanium alloy, which can ensure the corrosion resistance of the reaction system.

[0054] As a preferred embodiment of the present invention,

[0055] The total height of the lower head filter screen (including the drainage pipe) is 1300mm-1700mm; and / or,

[0056] The height of the columnar structure is 200-400 mm.

[0057] Further,

[0058] The lower head filter screen is installed in the lower head of the nonene reactor described in the present invention, a material outlet is arranged at the bottom of the lower head of the nonene reactor, and the drainage pipe of the lower head filter screen is arranged above the material outlet at the bottom of the nonene reactor and is connected with the material outlet.

[0059] As a preferred embodiment of the present invention,

[0060] The nonene reactor is provided with a discharge port at the bottom; preferably,

[0061] The discharge port is arranged beside the material outlet; and / or

[0062] The nominal diameter of the discharge port depends on the operation requirements, and is preferably 150-250 mm (DN150-DN250), preferably 150 mm, to facilitate the discharge and replacement of the catalyst.

[0063] The nonene reactor of the present invention is applied in the nonene preparation process. By adding a lower head filter in the lower head of the nonene reactor, the lower head filter is cleaned when the nonene reactor is switched every 3 months. The operator no longer needs to clean the valve A frequently, thereby ensuring that the heat transfer effect and pressure drop of the downstream heat exchanger can meet the process requirements.

[0064] The present invention is described in detail below in conjunction with specific drawings and embodiments. It is necessary to point out that the following embodiments are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made to the present invention by those skilled in the art based on the content of the present invention still fall within the scope of protection of the present invention.

[0065] Example 1

[0066] like Figure 2 As shown, a lower head filter screen 2 is installed in the lower head of the nonene reactor 1, a material outlet 4 is arranged at the bottom of the lower head of the nonene reactor 1, a drainage pipe 3 of the lower head filter screen 2 is arranged above the material outlet 4 at the bottom of the nonene reactor 1 and is connected thereto, a discharge port 5 is arranged beside the material outlet 4, and the nominal diameter of the discharge port 5 is 150 mm (DN150);

[0067] The upper part of the lower head filter 2 is a conical structure 6 which is narrow at the top and wide at the bottom. The conical structure 6 is a cone. The side wall of the conical structure 6 is a closed smooth inclined surface with a slope angle of 40°. The lower part of the lower head filter 2 is a columnar structure 7. The bottom edge of the conical structure 6 is consistent with the top edge of the columnar structure 7 and is connected. The columnar structure 7 is a cylinder. The side wall and bottom of the columnar structure 7 are both filter structures. The filter structure is a wire mesh with a mesh size of 100. A through hole is provided at the bottom of the columnar structure 7. The through hole is connected downwardly to a drainage pipe 3. The nominal diameter of the drainage pipe 3 matches the material outlet 4 of the nonene reactor 1. The height of the drainage pipe 3 is 500 mm. The bottom diameter of the conical structure 6 is 800 mm (DN800). The material of the lower head filter 2 is 321 stainless steel. The total height of the lower head filter 2 is 1300 mm. The height of the columnar structure 7 is 300 mm.

[0068] Example 2

[0069] Continue as Figure 2 As shown, a lower head filter screen 2 is installed in the lower head of the nonene reactor 1, a material outlet 4 is arranged at the bottom of the lower head of the nonene reactor 1, a drainage pipe 3 of the lower head filter screen 2 is arranged above the material outlet 4 at the bottom of the nonene reactor 1 and is connected thereto, a discharge port 5 is arranged beside the material outlet 4, and the nominal diameter of the discharge port 5 is 200 mm (DN200);

[0070] The upper part of the lower head filter 2 is a conical structure 6 which is narrow at the top and wide at the bottom. The conical structure 6 is a cone. The side wall of the conical structure 6 is a closed smooth inclined surface with a slope angle of 45°. The lower part of the lower head filter 2 is a columnar structure 7. The bottom edge of the conical structure 6 is consistent with the top edge of the columnar structure 7 and is connected. The columnar structure 7 is a cylinder. The side wall and bottom of the columnar structure 7 are both filter structures. The filter structure is a wire mesh with a mesh size of 150. A through hole is provided at the bottom of the columnar structure 7. The through hole is connected downwardly to a drainage pipe 3. The nominal diameter of the drainage pipe 3 matches the material outlet 4 of the nonene reactor 1. The height of the drainage pipe 3 is 600 mm. The bottom diameter of the conical structure 6 is 1000 mm (DN1000). The material of the lower head filter 2 is 321 stainless steel. The total height of the lower head filter 2 is 1500 mm. The height of the columnar structure 7 is 200 mm.

[0071] Example 3

[0072] like Figure 3 As shown, a lower head filter screen 2 is installed in the lower head of the nonene reactor 1, a material outlet 4 is arranged at the bottom of the lower head of the nonene reactor 1, a drainage pipe 3 of the lower head filter screen 2 is arranged above the material outlet 4 at the bottom of the nonene reactor 1 and is connected thereto, a discharge port 5 is arranged beside the material outlet 4, and the nominal diameter of the discharge port 5 is 250 mm (DN250);

[0073] The upper part of the lower head filter 2 is a conical structure 6 which is narrow at the top and wide at the bottom. The conical structure 6 is a truncated cone. The side wall of the conical structure 6 is a closed smooth inclined surface with a slope angle of 55°. The lower part of the lower head filter 2 is a columnar structure 7. The bottom edge of the conical structure 6 is consistent with the top edge of the columnar structure 7 and is connected. The columnar structure 7 is a cylinder. The side wall and bottom of the columnar structure 7 are both filter structures. The filter structure is a wire mesh with a mesh size of 200. A through hole is provided at the bottom of the columnar structure 7. The through hole is connected downwardly to a drainage pipe 3. The nominal diameter of the drainage pipe 3 matches the material outlet 4 of the nonene reactor 1. The height of the drainage pipe 3 is 800 mm. The bottom diameter of the conical structure 6 is 1200 mm (DN1200). The material of the lower head filter 2 is 321 stainless steel. The total height of the lower head filter 2 is 1700 mm. The height of the columnar structure 7 is 400 mm.

[0074] Comparative Example 1

[0075] In the attached Figure 1In the nonene reaction system, no filtering device is installed in the lower head of the reactor in the prior art. After the prior art equipment has been running for a long time, the catalyst will break and drop residues, causing the downstream heat exchanger and the coalescer to be blocked, especially the water cut-off regulating valve (A) of the water phase of the coalescer, which is often blocked, and the operator needs to clean it frequently during the production and operation of the device. In addition, the aqueous phase medium contains a large amount of phosphoric acid, which is irritating and corrosive to the skin and eyes, and is not conducive to safe production. In addition, when the residue accumulates to a certain extent, the heat transfer effect of the heat exchanger will deteriorate, the pressure drop will increase, and the process requirements cannot be met.

[0076] 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.

[0077] 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.

[0078] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A bottom head filter for a nonene reactor, characterized in that: The upper part of the lower head filter is a conical structure that is narrow at the top and wide at the bottom. The side wall of the conical structure is a closed smooth slope. The lower part of the lower head filter is a columnar structure. The side wall and bottom of the columnar structure are both filter structures. A through hole is provided at the bottom of the columnar structure, and a drainage pipe is connected downward to the through hole.

2. The lower head filter screen according to claim 1 is characterized in that: The bottom edge of the conical structure is consistent in shape with the top edge of the columnar structure and is connected; and / or, The conical structure is a cone or a frustum; preferably, a cone, a pyramid, a truncated cone or a prism; and / or, The columnar structure is a cylinder or a prism; and / or, The slope angle of the smooth inclined surface is greater than or equal to the sliding angle of the catalyst, and is preferably 40° to 55°.

3. The lower head filter screen according to claim 1, characterized in that: The filter structure is a wire mesh, and / or the mesh number of the filter structure is 100 to 800 meshes, preferably 200 to 800 meshes.

4. The lower head filter screen according to claim 1, characterized in that: The nominal diameter of the draft tube matches the material outlet of the nonene reactor; and / or, The height of the drainage tube is 500 mm to 800 mm.

5. The lower head filter screen according to claim 1, characterized in that: The bottom diameter of the cone-shaped structure is 800 to 1200 mm; Preferably, when the cone-shaped structure is a pyramid or a prism, the bottom area of ​​the cone-shaped structure is 0.5 m 2 ~1.2m 2 .

6. The lower head filter screen according to claim 1, characterized in that: The lower head filter screen is made of 321 stainless steel or titanium alloy.

7. The lower head filter screen according to claim 1, characterized in that: The total height of the lower head filter is 1300mm-1700mm; and / or, The height of the columnar structure is 200-400 mm.

8. A nonene reactor, characterized in that: The lower head filter screen as described in any one of claims 1 to 7 is installed in the lower head of the reactor, a material outlet is arranged at the bottom of the lower head of the nonene reactor, and the drainage pipe of the lower head filter screen is arranged above the material outlet at the bottom of the nonene reactor and is connected thereto.

9. The nonene reactor according to claim 8, characterized in that: The nonene reactor is provided with a discharge port at the bottom; preferably, The discharge port is arranged beside the material outlet; and / or The nominal diameter of the discharge port is 150-250 mm.

10. Use of the nonene reactor according to claim 8 or 9 in a nonene preparation process.

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