CN217568654U - Radial moving bed reactor with lower inlet, middle outlet and upper inlet - Google Patents

Abstract

The utility model discloses a radial moving bed reactor with lower inlet and middle outlet to overcome the defects that the prior art catalyst bed layer is fluidized due to the influence of reaction airflow and expensive catalyst is brought out by reaction medium. Including reactor shell, intranet, extranet, sealed apron, catalyst conveyer pipe, reactant entry, product export, catalyst entry and catalyst export, sealed apron is the ring plate, and the level sets up between extranet top and intranet top, constitutes annular catalyst filling space between intranet and the extranet, and reactor upper portion space above the sealed apron sets up the sweep gas entry, reactant entry is located reactor shell lower part or bottom, and the product export is located the catalyst bed side department below the reactor extranet top, and reactant entry intercommunication intranet, the space that forms between extranet and the reactor shell is product stream accumulation space, and product export intercommunication product stream accumulation space.

Description

Radial moving bed reactor with lower inlet, middle outlet and upper inlet

Technical Field

The utility model belongs to the petrochemical field specifically, relates to a lower business turn over well play radial moving bed reactor.

Background

The moving bed technology is an important processing means in the field of oil refining chemical industry, is an important process technology for producing high-quality oil products and chemical products, and the core equipment of the moving bed technology is a radial moving bed reactor. The radial moving bed reactor refers to a reactor in which a catalyst passes through an annular space formed by an outer net and an inner net from top to bottom by virtue of self gravity, a medium flows from the outer net to the center of the reactor in the radial direction, and after the catalyst reacts through a catalyst bed layer, a reaction product is separated from the catalyst through the inner net.

Due to the continuous development of moving bed technology, such as propane dehydrogenation technology, there is an urgent need for a reactor with a flow direction opposite to that of the reaction medium in the prior art, so that the reaction medium can rapidly enter the reactor and react through the catalyst bed, the distribution of the medium in the catalyst bed is more uniform, fluidization of the catalyst bed due to the influence of the reaction gas flow and the entrainment of expensive catalyst by the reaction medium are avoided, and in order to meet the above requirements, the invention provides a novel radial moving bed reactor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a lower business turn over radial moving bed reactor to overcome prior art catalyst bed because the fluidization appears and avoid expensive catalyst to be taken over by reaction medium shortcoming such as the influence of reaction gas flow.

The utility model provides a lower business turn over radial moving bed reactor, including reactor shell, intranet, extranet, catalyst conveyer pipe, reactant entry, result export, catalyst entry and catalyst export, intranet and extranet setting are inside reactor shell, its characterized in that: the radial moving bed reactor with the lower inlet and the middle outlet further comprises a sealing cover plate, the outer net is located outside the inner net, the sealing cover plate is a circular ring-shaped plate and is horizontally arranged between the top end of the outer net and the top end of the inner net, the bottom ends of the inner net and the outer net are respectively arranged at the bottom of the reactor shell, the inner net and the outer net form an annular space which is a catalyst filling space, the upper space of the reactor above the sealing cover plate is provided with a blowing gas inlet, the reactant inlet is located at the lower part or the bottom of the reactor shell, the product outlet is located at the side of a catalyst bed layer below the top end of the outer net of the reactor, the catalyst inlet is located at the upper part or the top of the reactor shell, the catalyst outlet is located at the lower part or the bottom of the reactor shell, the reactant inlet is communicated with the inner net, the space formed between the outer net and the reactor shell is a product flow accumulation space, the product outlet is communicated with the accumulation product flow space, the catalyst inlet is communicated with the catalyst filling space through a catalyst conveying pipe, and the catalyst outlet is communicated with the bottom of the catalyst filling space.

A under advance in and go out radial moving bed reactor, preferably, should advance in and go out radial moving bed reactor still include the water conservancy diversion awl section of thick bamboo down, the water conservancy diversion awl section of thick bamboo sets up inside the intranet, and water conservancy diversion awl section of thick bamboo upper end is fixed in intranet upper portion, and the cone is down, and the water conservancy diversion awl section of thick bamboo can be for solid, also can be hollow, and the upper end is big, and the lower extreme is little, and the appearance is a back taper, and its upper end outer fringe is preferred 50 ~ 400mm apart from the intranet, and the intranet upper end is arranged in to the upper end, and the cone is down.

A lower business turn over well radial moving bed reactor, preferably, sealed apron piecemeal setting, sealed apron is the ring shape board that the combination of a plurality of boards formed, preferably 2 to 16 ring shape boards that the combination formed, and separation reaction medium flows to the reactor space more than the apron promptly.

The utility model relates to a radial moving bed reactor of business turn over in, preferably, the product export can be one, also can be two or more.

A under advance in and go out radial moving bed reactor, preferably, intranet and outer net bottom support respectively and set up in reactor casing bottom, upwards inflation.

The utility model discloses a radial moving bed reactor with lower inlet, middle outlet, preferably, the inner net is composed of an inner net V-shaped wire and an inclined support ring, and the length direction of the inner net V-shaped wire is parallel to the axis of the reactor; the inclined support ring forms a certain included angle with the length direction of the intranet V-shaped wire, and the included angle a between the inclined support ring and the horizontal reference line can be expressed and defined, and preferably the included angle a is 0-45 °. V-shaped wire is a triangular section wire with a triangular cross section.

A lower business turn over well radial moving bed reactor, preferably, the outer net comprises outer net V type silk and annular support ring welding, outer net V type silk length direction and reactor axial direction parallel, and annular support ring is perpendicular with outer net V type silk.

A radial moving bed reactor advances in, can be used to oil refining chemical industry field to carry out the effect process of fluid raw materials and solid catalyst (or solid adsorbent), for example can include low carbon hydrocarbon dehydrogenation reaction, isomerization reaction, reforming reaction, gaseous desulfurization, at least one in the liquid phase absorption, specifically, can make solid materials such as solid catalyst get into catalytic reaction district in succession, and move downwards along the axial, make reaction material get into the reactor and along flowing through catalytic reaction district along radial from this reactor lower part or bottom, carry out cross-flow contact reaction with solid catalyst.

A lower advance well and go out radial moving bed reactor, its advantage compared with prior art is: 1) The radial moving bed reactor with lower inlet, middle outlet and the like adopts the technical scheme that reactants enter from the lower part or the bottom of the reactor, and reaction products which radially pass through a catalyst bed layer to react flow out from the middle part of the reactor, so that the length of a pipeline between an outlet and a downstream heating furnace can be shortened, the investment is reduced, meanwhile, balance gas can be introduced into an upper space, and the fluidization tendency of the catalyst is overcome;

2) When the inclined supporting ring is preferably arranged on the supporting ring of the inner net, the reaction can change the flow direction of the reaction medium through the inclined supporting ring arranged on the inner net to ensure that the reaction medium has the tendency of flowing obliquely downwards while meeting the centrifugal flow of the reaction medium (namely reactant), thereby overcoming the fluidization tendency of the catalyst;

3) When the flow guide cone is preferably arranged in the inner net, the inner space of the inner net is small at the top and big at the bottom, so that reaction media entering the inner net can quickly enter a catalyst bed layer, and the requirements of high flow rate of process devices such as propane dehydrogenation and the like are met;

4) The purge gas inlet arranged in the upper area of the reactor of the utility model continuously purges the upper area, which can play a role in preventing the catalyst from escaping to the upper space;

5) The utility model discloses can promote device's throughput and the ability of long period operation.

The present invention will be described in further detail with reference to the drawings and the following detailed description, which should not be construed as limiting the scope of the invention.

Drawings

FIG. 1 is a front view of a radial moving bed reactor of the prior art;

FIG. 2 is a top view of FIG. 1;

fig. 3 is a front view of a radial moving bed reactor with lower inlet, middle outlet;

FIG. 4 is a top view of FIG. 3;

fig. 5 is a front view of an inner net of a radial moving bed reactor with lower inlet, middle outlet;

FIG. 6 is a top view of FIG. 5;

fig. 7 is a front view of an outer net of a radial moving bed reactor with lower inlet, middle outlet;

fig. 8 is a top view of fig. 7.

The reference numerals shown in the figures are:

1-inner net, 2-outer net, 3-catalyst filling space, 4-catalyst inlet, 5-catalyst conveying pipe, 6-catalyst outlet, 7-upper reactant inlet, 8-lower product outlet, 9-reactor shell, 11-reactant inlet, 12-product outlet, 13-purge gas inlet, 14-sealing cover plate, 15-guide cone, 16-inner net V-shaped wire, 17-inclined support ring, 18-outer net V-shaped wire and 19-annular support ring.

Detailed Description

As shown in fig. 1 and 2, the reactor is a radial moving bed reactor commonly used in industry, and comprises a reactor shell 9, an inner net 1, an outer net 2, a catalyst conveying pipe 5, an upper reactant inlet 7 and a lower product outlet 8, etc., wherein the upper reactant inlet 7 is arranged at the upper part or the top of the reactor shell 9, the lower product outlet 8 is arranged at the lower part or the bottom of the reactor shell 9, a reaction medium enters the reactor from the upper reactant inlet 7, flows to the center of the reactor from an annular space formed by the reactor shell 9 and the outer net 2, and flows downwards from the inner net through the lower product outlet 8 after reacting through a catalyst bed layer, and is led out of the reactor.

As shown in fig. 3-8, the present invention relates to a bottom-in and middle-out radial moving bed reactor, which comprises a reactor shell 9, an inner net 1, an outer net 2, a catalyst conveying pipe 5, a reactant inlet 11, a product outlet 12, a catalyst inlet 4 and a catalyst outlet 6, wherein the inner net 1 and the outer net 2 are arranged inside the reactor shell 9, the inner net 1, the outer net 2 and the reactor shell 9 are coaxially arranged, the bottom-in and middle-out radial moving bed reactor further comprises a sealing cover plate 14, the outer net 2 is arranged outside the inner net 1, the sealing cover plate 14 is a circular ring plate, the sealing cover plate is horizontally arranged between the top end of the outer net 2 and the top end of the inner net 1, the bottom ends of the inner net 1 and the outer net 2 are respectively arranged at the bottom of the reactor shell 9, the inner net 1 and the outer net 2 form a circular space, the space is a catalyst filling space 3, and the catalyst filling space 3 is filled with catalyst, the space formed between the outer net 2 and the reactor shell 9 is a product flow accumulation space for accumulating reaction products, a purge gas inlet 13 is arranged in the upper space of the reactor above a sealing cover plate 14, the reactant inlet 11 is positioned at the lower part or the bottom of the reactor shell 9, the product outlet 12 is positioned at the side of the catalyst bed layer below the top end of the outer net 2 of the reactor, the catalyst inlet 4 is positioned at the upper part or the top of the reactor shell 9, the catalyst outlet 6 is positioned at the lower part or the bottom of the reactor shell 9, the reactant inlet 11 is communicated with the inside of the inner net 1, the product outlet 12 is communicated with the product flow accumulation space, the product outlet 12 can be one or two or more (one is arranged in figure 3), the reaction products are discharged through the product outlet 12, the catalyst inlet 4 is communicated with the catalyst filling space 3 through a catalyst conveying pipe 5, and the catalyst outlet 6 is communicated with the bottom of the catalyst filling space 3, the reactor shell 9, the inner net 1 and the outer net 2 are coaxially arranged.

As shown in fig. 3, the radial moving bed reactor with downward-in, middle-out further includes a diversion cone cylinder 15, the diversion cone cylinder 15 is disposed inside the inner net 1 and coaxial with the inner net 1, the upper end of the diversion cone cylinder 15 is fixed on the upper portion of the inner net 1, the cone faces downward, and the diversion cone cylinder 15 is a closed cylinder. The guide cone cylinder 15 can be solid or hollow, the upper end is large, the lower end is small, the shape is an inverted cone, the distance between the outer edge of the upper end and the inner net is preferably 50-400 mm, the upper end is arranged at the upper end of the inner net, and the cone faces downwards.

The sealing cover plate 14 can be arranged in blocks, that is, the sealing cover plate 14 is a circular ring plate formed by combining a plurality of plates, preferably 2 to 16 plates, and blocks the reaction medium from flowing to the space of the reactor above the sealing cover plate.

The bottom ends of the inner net 1 and the outer net 2 are respectively supported and arranged at the bottom of the reactor shell 9 and can be expanded upwards.

The inner net 1 consists of an inner net V-shaped wire 16 and an inclined support ring 17 (preferably welded), and the length direction of the inner net V-shaped wire 16 is parallel to the axis of the reactor; the inclined support rings 17 form an included angle with the length direction of the intranet V-shaped wires 16, and the included angle a between the inclined support rings and the horizontal reference line is defined as denoted by an included angle a, and preferably, the included angle a is 0-45 °.

The V-shaped filament (including the outer net V-shaped filament 18 and the inner net V-shaped filament 16) is a triangular section filament with a triangular cross section.

The outer net 2 is composed of outer net V-shaped wires 18 and annular supporting rings 19 (preferably welded), the length direction of the outer net V-shaped wires 18 is parallel to the axial direction of the reactor, and the annular supporting rings 19 are perpendicular to the outer net V-shaped wires 18.

The bottom of intranet 1 and outer net 2 preferably supports respectively and sets up in reactor casing 9 bottoms for the separation reaction medium is to reactor upper portion space diffusion, and intranet 1 constitutes the annular space with outer net 2, and this space loads the catalyst, and the catalyst relies on self gravity top-down to pass through the annular space that intranet 1 and outer net 2 constitute.

As shown in fig. 3, the simple working process of the radial moving bed reactor with the lower inlet, the middle outlet and the upper outlet of the utility model is as follows: the catalyst enters the catalyst filling space 3 from the catalyst inlet 4 through the catalyst conveying pipe 5 and moves downwards along the axial direction, a catalytic reaction medium enters the inner net 1 from a reactant inlet 11 at the lower part of the reactor, flows around the reactor after being guided by the inclined supporting ring 17 of the inner net 1, radially penetrates through the annular catalyst filling space 3 filled with the catalyst and reacts with the catalyst in a cross flow contact manner, a reaction product flows out of the reactor from a product outlet 12 positioned on the side surface of a catalyst bed layer after being isolated by the outer net 2, a scavenging gas inlet 13 is arranged in the upper space of the reactor above the sealing cover plate 14, and the scavenging gas is introduced to continuously purge the top area of the reactor, wherein the pressure of the scavenging gas is usually slightly higher than the pressure of the reaction medium, so that pressure balance is realized, and the catalyst is prevented from escaping to the space above the sealing cover plate.

Claims (10)

1. The utility model provides a radial moving bed reactor of business turn over in lower, includes reactor shell, intranet, extranet, catalyst conveyer pipe, reactant entry, product export, catalyst entry and catalyst export, and intranet and extranet setting are inside its characterized in that at reactor shell: the lower-in middle-out radial moving bed reactor further comprises a sealing cover plate, an outer net is positioned outside the inner net, the sealing cover plate is a circular ring-shaped plate and is horizontally arranged between the top end of the outer net and the top end of the inner net, the bottom ends of the inner net and the outer net are respectively arranged at the bottom of the reactor shell, an annular space is formed between the inner net and the outer net and is a catalyst filling space, a purge gas inlet is arranged in the upper space of the reactor above the sealing cover plate, a reactant inlet is positioned at the lower part or the bottom of the reactor shell, a product outlet is positioned at the side face of a catalyst bed layer below the top end of the outer net of the reactor, the catalyst inlet is positioned at the upper part or the top of the reactor shell, a catalyst outlet is positioned at the lower part or the bottom of the reactor shell, the reactant inlet is communicated with the inner net, the space formed between the outer net and the reactor shell is a product flow accumulation space, the product outlet is communicated with the product flow accumulation space, the catalyst inlet is communicated with the catalyst filling space through a catalyst conveying pipe, and the catalyst outlet is communicated with the bottom of the catalyst filling space.

2. A lower-in, middle-out radial moving bed reactor as recited in claim 1, wherein: the radial moving bed reactor with the lower inlet, the middle outlet and the radial moving bed reactor further comprises a guide cone cylinder, the guide cone cylinder is arranged inside the inner net, the upper end of the guide cone cylinder is fixed on the upper portion of the inner net, and the cone faces downwards.

3. A lower-in, middle-out radial moving bed reactor as recited in claim 1, wherein: the sealing cover plate is arranged in blocks.

4. A lower-in, middle-out radial moving bed reactor as recited in claim 3, wherein: the sealing cover plate is a circular ring-shaped plate formed by combining 2 to 16 plates.

5. A lower-in, middle-out radial moving bed reactor as recited in claim 1, wherein: the number of the product outlets is one or more than two.

6. A lower-in, middle-out radial moving bed reactor as recited in claim 1, wherein: the bottom ends of the inner net and the outer net are respectively supported and arranged at the bottom of the reactor shell.

7. A lower-in, middle-out radial moving bed reactor as recited in claim 1, wherein: the intranet comprises intranet V type silk and slope support ring, and intranet V type silk length direction is parallel with the reactor axis, and slope support ring and intranet V type silk length direction are certain contained angle.

8. A lower-in, middle-out radial moving bed reactor as recited in claim 7, wherein: the inclined support ring and the horizontal reference line form an included angle a, and the included angle a is 0-45 degrees.

9. A lower-in, middle-out radial moving bed reactor as recited in claim 1, wherein: the outer net is composed of outer net V-shaped wires and an annular supporting ring, the length direction of the outer net V-shaped wires is parallel to the axial direction of the reactor, and the annular supporting ring is perpendicular to the outer net V-shaped wires.

10. A lower-in, middle-out radial moving bed reactor as recited in claim 2, wherein: the guide cone cylinder is solid or hollow, the upper end of the guide cone cylinder is large, the lower end of the guide cone cylinder is small, the guide cone cylinder is in an inverted cone shape, and the distance from the outer edge of the upper end of the guide cone cylinder to the inner net is 50-400 mm.

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