Multi-layer supported catalyst assembly

Abstract

The utility model belongs to the field of catalysts, and provides a multi-layer supported catalyst assembly, which comprises a supporting base, the first catalyst layer, the first grid layer, the second catalyst layer, the third catalyst layer, the second grid layer, the fourth catalyst layer, the fifth catalyst layer, the sixth catalyst layer and the third grid layer are sequentially arranged on the supporting base from top to bottom; and a silk screen is laid between every two layers. Multiple layers of catalysts are supported by multiple layers of grids, so that the contact area between reactants and the catalysts can be increased, the catalytic efficiency is improved, the fluid distribution is optimized, and the reactants are ensured to uniformly pass through the catalyst layers; in addition, the grid structure enhances the mechanical strength of the catalyst, prevents the catalyst from being damaged or pulverized in long-term operation, prolongs the service life, and ensures high efficiency and stability of catalytic reaction.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of catalyst, especially a kind of multilayer supported catalyst assembly. BACKGROUND

[0002] In the field of chemical industry, petrochemical industry and environmental protection, catalyst is widely used in various reaction processes, aiming at improving process efficiency by accelerating chemical reaction rate, reducing reaction temperature and improving reaction selectivity. The traditional catalyst structure is mainly single-layer or stacked catalyst bed, although these designs have certain advantages in specific applications, but with the industrial production of scale and process complexification, its limitations gradually appear.

[0003] The existing catalyst device often cannot fully optimize the distribution of fluid, in the traditional single-layer catalyst bed or stacked catalyst bed, the flow path of reactant is limited, and uneven distribution of fluid can lead to insufficient local reaction or premature failure of catalyst. Especially in larger scale reactor, fluid short circuit or local retention phenomenon can be more obvious, which directly affects the overall activity of catalyst and reaction efficiency.

[0004] Therefore, how to optimize the structural design of catalyst, improve the uniformity of fluid distribution, mechanical strength of catalyst and heat transfer efficiency, becomes a problem to be solved in the prior art. SUMMARY

[0005] The multilayer supported catalyst assembly of the utility model is used to solve the technical problems in the background art.

[0006] The technical scheme provided by the utility model is as follows: a multilayer supported catalyst assembly, comprising: a support base, a first catalyst layer, a first grid layer, a second catalyst layer, a third catalyst layer, a second grid layer, a fourth catalyst layer, a fifth catalyst layer, a sixth catalyst layer and a third grid layer are sequentially arranged on the support base from top to bottom.

[0007] Silk screen is arranged between each level of the first catalyst layer, the first grid layer, the second catalyst layer, the third catalyst layer, the second grid layer, the fourth catalyst layer, the fifth catalyst layer, the sixth catalyst layer and the third grid layer.

[0008] In an embodiment, the first catalyst layer, the second catalyst layer, the third catalyst layer, the fourth catalyst layer, the fifth catalyst layer and the sixth catalyst layer are respectively composed of first specification catalyst or second specification catalyst or combination of first specification catalyst and second specification catalyst; the specification of first specification catalyst is 100*100*50mm, and the specification of second specification catalyst is 100*50*50mm.

[0009] In one embodiment, the first catalyst layer, the second catalyst layer, the fourth catalyst layer and the sixth catalyst layer are all formed by full laying of the first specification catalyst, and the cross section is 1300*1300mm.

[0010] In one embodiment, the third catalyst layer and the fifth catalyst layer are both composed of the second specification catalyst filled around, and the first specification catalyst laid in the middle of the second specification catalyst.

[0011] In one embodiment, the first grid layer is a 304 stainless steel grid plate with a thickness of 50mm.

[0012] In one embodiment, the second grid layer is a 310S stainless steel grid plate with a thickness of 40mm.

[0013] In one embodiment, the third grid layer is a 310S stainless steel grid plate with a thickness of 50mm.

[0014] In one embodiment, the wire mesh has a precision of 1 mesh and a wire diameter of 2-3mm.

[0015] In one embodiment, the third grid layer is coated with refractory mortar on the outside around, and the refractory mortar is coated with aluminum silicate cotton on the outside around.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] (1) The multi-layer supported catalyst assembly of the utility model supports multiple catalysts through multiple grids, can increase the contact area of reactants and catalysts, improve the catalytic efficiency, optimize the distribution of fluid, and ensure that the reactants pass through the catalyst layer uniformly; in addition, the grid structure enhances the mechanical strength of the catalyst, prevents the catalyst from being damaged or pulverized during long-term operation, prolongs the service life, and ensures the high efficiency and stability of the catalytic reaction.

[0018] (2) The multi-layer supported catalyst assembly of the utility model lays a wire mesh between each layer, realizes efficient heat transfer between each catalyst layer through the wire mesh, effectively improves the heat transfer efficiency between each catalyst layer, and thus improves the catalytic efficiency of each catalyst layer. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 is the three-dimensional structure schematic view of the multi-layer supported catalyst assembly of the utility model;

[0020] Fig. 2 is the sectional view of the utility model.

[0021] The reference signs are as follows: 1, support base; 2, first catalyst layer; 3, first grid layer; 4, second catalyst layer; 5, third catalyst layer; 6, second grid layer; 7, fourth catalyst layer; 8, fifth catalyst layer; 9, sixth catalyst layer; 10, third grid layer; 11, wire mesh; 12, refractory mortar; 13, aluminum silicate cotton. DETAILED DESCRIPTION

[0022] The application will be described in detail below with specific examples. The following examples will help those skilled in the art to further understand the application, but do not limit the application in any form. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the concept of the application. These are within the scope of protection of the application.

[0023] As Figs. 1-2 shown, the utility model is a kind of multilayer support's catalyst assembly, comprising: support base 1, support base 1 is sequentially provided with first catalyst layer 2, first grid layer 3, second catalyst layer 4, third catalyst layer 5, second grid layer 6, fourth catalyst layer 7, fifth catalyst layer 8, sixth catalyst layer 9 and third grid layer 10 from top to bottom;First catalyst layer 2, first grid layer 3, second catalyst layer 4, third catalyst layer 5, second grid layer 6, fourth catalyst layer 7, fifth catalyst layer 8, sixth catalyst layer 9 and third grid layer 10 are each laid with wire mesh 11 between levels.The utility model multilayer support's catalyst assembly, by multilayer grid supports multilayer catalyst, can increase the contact area of reactant and catalyst, improve catalytic efficiency, optimize the distribution of fluid at the same time, ensure that reactant passes through catalyst layer uniformly;In addition, the mechanical strength of grid structure is strengthened to catalyst, prevent catalyst from breaking or pulverization in long-term operation, prolong service life, ensure that catalytic reaction is efficient and stable.

[0024] In the embodiment, wire mesh 11 is heat-resistant wire mesh, for efficient heat transfer between each catalyst layer, effectively improving the heat transfer efficiency between each catalyst layer, thereby improving the catalytic efficiency of each catalyst layer.

[0025] In the embodiment, the catalyst used in first catalyst layer 2, second catalyst layer 4, third catalyst layer 5, fourth catalyst layer 7, fifth catalyst layer 8 and sixth catalyst layer 9 has two specifications, respectively first specification catalyst and second specification catalyst, the specification of first specification catalyst is 100*100*50mm, and the specification of second specification catalyst is 100*50*50mm. By placing the upper and lower layers of first specification catalyst and second specification catalyst staggered, the problem of short flow of gas flow caused by the gap between the catalyst block body shape size error and the box body periphery when filling is avoided, so that the catalyst achieves stable treatment effect.

[0026] The first catalyst layer 2, the second catalyst layer 4, the fourth catalyst layer 7 and the sixth catalyst layer 9 are all formed by full filling of the first specification catalyst, and the cross section is 1300*1300mm.

[0027] The third catalyst layer 5 and the fifth catalyst layer 8 respectively include: the second specification catalyst filled around, in a frame type structure, and the first specification catalyst is filled between the second specification catalyst; in the third catalyst layer 5 and the fifth catalyst layer 8, the cross section size of the first specification catalyst is 1300*1300mm, and the cross section size of the second specification catalyst is 1300*1300mm, and in the third catalyst layer 5 and the fifth catalyst layer 8, the smaller second specification catalyst is used to fill the surrounding area, so that the overall area of the catalyst bed can be fully utilized, and the filling density of the catalyst is improved.

[0028] The first grid layer 3 is a 304 stainless steel grid plate with a thickness of 50mm; the 304 stainless steel grid plate has excellent corrosion resistance and can remain stable in a wide temperature range, and the thickness of 50mm provides high mechanical strength, which can effectively support the first catalyst layer 2, ensure stable laying of the catalyst, and prevent deformation or collapse.

[0029] The second grid layer 6 is a 310S stainless steel grid plate with a thickness of 40mm; the 310S stainless steel grid plate has higher heat resistance and can withstand high-temperature catalytic reaction, and the thickness of 40mm is slightly thinner than that of the first grid layer 3 and the third grid layer 10, which can reduce the resistance when the gas flows through, optimize the gas flow channel, and improve the reaction efficiency of each catalyst layer.

[0030] The third grid layer 10 is a 310S stainless steel grid plate with a thickness of 50mm; the 310S stainless steel grid plate with a thickness of 50mm can still maintain good mechanical strength in a high-temperature environment, ensuring the stability of the upper catalyst and structure.

[0031] The wire mesh 11 has an accuracy of 1 mesh and a wire diameter of 2-3mm; the wire mesh 11 helps to improve the heat transfer efficiency and ensures the thermal stability of the catalytic reaction; the design of the accuracy and the wire diameter ensures smooth airflow while preventing catalyst displacement or sinking, improving the stability of the equipment.

[0032] Further, the support base 1 is an open-top frame structure, the third grid layer 10 is connected in the frame of the support base 1, the refractory mortar 12 is filled at the outer gap around the third grid layer 10, the aluminum silicate cotton 13 is coated outside the refractory mortar 12, and the aluminum silicate cotton 13 is compacted and adhered between the refractory mortar 12 and the support base 1; the filling of the refractory mortar 12 ensures the sealing property in the high-temperature environment, prevents heat leakage, and the aluminum silicate cotton 13 as an excellent heat insulation material can further insulate heat transfer, reduce heat exchange between the catalyst layer and the external structure, maintain the thermal stability in the reaction area, and improve the efficiency of the catalytic reaction.

[0033] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0034] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A multilayer supported catalyst assembly, characterized by, It comprises: A support base (1), a first catalyst layer (2), a first grid layer (3), a second catalyst layer (4), a third catalyst layer (5), a second grid layer (6), a fourth catalyst layer (7), a fifth catalyst layer (8), a sixth catalyst layer (9) and a third grid layer (10) are sequentially arranged on the support base (1) from top to bottom; Each layer of the first catalyst layer (2), the first grid layer (3), the second catalyst layer (4), the third catalyst layer (5), the second grid layer (6), the fourth catalyst layer (7), the fifth catalyst layer (8), the sixth catalyst layer (9) and the third grid layer (10) is laid with a wire mesh (11).

2. A multiple layer supported catalyst assembly as claimed in claim 1 wherein, The first catalyst layer (2), the second catalyst layer (4), the third catalyst layer (5), the fourth catalyst layer (7), the fifth catalyst layer (8) and the sixth catalyst layer (9) are respectively composed of a first specification catalyst or a second specification catalyst or a combination of a first specification catalyst and a second specification catalyst; the specification of the first specification catalyst is 100*100*50mm, and the specification of the second specification catalyst is 100*50*50mm.

3. A multiple layer supported catalyst assembly as claimed in claim 2 wherein, The first catalyst layer (2), the second catalyst layer (4), the fourth catalyst layer (7) and the sixth catalyst layer (9) are all formed by full laying of the first specification catalyst, and the cross section is 1300*1300mm.

4. A multiple layer supported catalyst assembly as claimed in claim 2 wherein, The third catalyst layer (5) and the fifth catalyst layer (8) are both composed of the second specification catalyst filled around, and the first specification catalyst laid in the middle of the second specification catalyst.

5. A multiple layer supported catalyst assembly as claimed in claim 1 wherein, The first grid layer (3) is a 304 stainless steel grid plate with a thickness of 50mm.

6. A multiple layer supported catalyst assembly as claimed in claim 1 wherein, The second grid layer (6) is a 310S stainless steel grid plate with a thickness of 40mm.

7. A multiple layer supported catalyst assembly as claimed in claim 1 wherein, The third grid layer (10) is a 310S stainless steel grid plate with a thickness of 50mm.

8. A multiple layer supported catalyst assembly as in claim 1 wherein, The wire mesh (11) has an accuracy of 1 mesh and a wire diameter of 2-3mm.

9. A multiple layer supported catalyst assembly as in claim 1 wherein, The third grid layer (10) is externally coated with refractory mortar (12) around, and the refractory mortar (12) is externally coated with aluminum silicate cotton (13) around.

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