BRPI1106728A2 - CATALYST PARTICLE CHARGER FOR VERTICAL TUBULAR REACTOR AND LOADING METHOD - Google Patents

Abstract

CATALYST PARTICULAR CHARGER FOR VERTICAL TUBULAR REACTOR AND CHARGING METHOD - The charger consists of three interconnected parts: head (100) at the top, body (200) at the center and distributor (300) at the bottom. In its configuration, the equipment allows oriented loading of catalyst in multi-bed reactors, in addition to improving efficiency and operational safety when compared to the usual procedures.

Description

CATALYST PARTICLE CHARGER FOR VERTICAL TUBULAR REACTOR AND LOADING METHOD

FIELD OF INVENTION

The magazine is useful equipment for introducing catalyst particles into a vertical tubular reactor to create one or more dense catalyst beds with uniform particle distribution and leveling of each bed.

BACKGROUND OF THE INVENTION

The distribution of catalyst particles within a fixed bed reactor 10 usually impacts its performance, affecting the efficiency and throughput of the process to which it applies. Other aspects to consider are the possible mechanical damage to the catalyst particles that may occur during the loading procedure and the safety of the operation itself.

Oriented catalyst loading is a

It is used for fixed bed reactors in order to minimize void spaces between catalyst particles and to avoid preferential load paths in the catalyst bed of the reactor. When compared to the manual loading method from the top of the reactor to the loading zone 20, oriented loading enables an average increase of approximately 20% in the amount of catalyst in the generated bed to be obtained, and consequently greater interaction between the charge and the catalyst.

Loaders are usually referred to as equipment used to introduce catalyst particles into vertical tubular reactors according to the oriented loading procedure.

In the specialized literature several carriers are disclosed. However, shippers often do not allow a dense, homogeneous and uniform bed to be obtained, and / or involve complex and costly procedures, as disclosed in US patents 3,804,273 and US 3,995,753.

Pl 9001803-6 discloses a device and a simple procedure for oriented loading of reactors, wherein the device is supported on the manhole of a vertical tubular reactor, directly on the upper 5 flange, by means of support angles. With this device, as shown in Figure 1, the particles descend through the tubular body and are radially projected to create a dense, evenly distributed catalyst bed.

However, such a device only allows the loading of catalyst in a single bed reactor and requires personnel to enter the reactor to level the dense bed thus constituted. As shown in Figure 1, the device comprises a main tubular body (25) provided at its upper end with a flange (27) and an upper tubular body (29), laterally provided with an inlet connection (35) and upper of a flexible hose (37), and a tubular guide body (41) positioned between the main tubular body (25) and the upper tubular body (29), wherein the main tubular body (25) is internally and concentrically provided with a tubing ( 43) having at its lower end a sleeve (51) attached to a distributing disc (53) which connects to a loading disc (55) through regulators (57).

However, for one expert the difficulties of catalyst loading are evident, especially when dealing with a large reactor. A first difficulty relates to the handling of the charger itself, another to the labor to carry out the charging. Therefore, the development of a simple, efficient and safe charger to reduce the risk of accidents is still necessary. This need is enhanced when it comes to creating more than one dense catalyst bed so that, in addition to the good distribution of the catalyst particles, the beds are leveled out without the need for personal entry into the reactor.

DESCRIPTION OF DRAWINGS

Figure 1 shows a simplified schematic of an oriented loading device as described in Pl 9001803-6 (state of the art).

Figure 2 shows schematically the magazine consisting of head (100) in the upper part, body (200) in the central part, and terminal (300) in the lower part.

Figure 2a shows details of the upper part of the magazine to connect to a catalyst storage silo (not shown), one head being (100) in a single segmented block: a) a first tubular segment (1) with two side eyes (2); b) a second trunk-shaped tubular segment (3) joined to the first tubular segment (1) by its smaller diameter upper opening; c) a third cylindrical tubular segment (4) joined to the second tubular element (3) and terminated by a perforated ring-shaped flange (7); d) retractable arms (5) fixed radially to the side wall of the tubular segment (4), elongated and split, having a movable part (5a) that slides with the aid of the casters (5c) along a fixed part (5b) and it immobilizes within the cavity of the fixed part (5b) by means of locking pins that pass through holes (5d); and e) a flange (6) attached to the side wall of the tubular segment (4) for connecting a gas line from an external source (not shown).

Figure 2b shows details of the central part of the magazine, a body (200) consisting of a feed tube (8), terminated by a perforated ring flange (7a), and a gas tube (6a) for passage gas from an external source (not shown).

Figure 2c shows details of the lower part of the charger, consisting of a terminal (300) with a distributing disc (10), a blower disc (11), and a sleeve (12) that connects to a gas pipe (6a). (not shown).

DETAILED DESCRIPTION OF THE INVENTION

For ease of understanding, the catalyst particle loader equipment for a vertical tubular reactor is described with the aid of the accompanying figures.

The charger is useful for creating one or more dense, uniform, level catalyst beds within the reactor. The verticalization and movement of the loader inside the reactor is performed with the help of cables that support the loader also for mounting and alignment of its parts.

The charger must be assembled with its three interconnected constituent parts as illustrated in Figure 2, namely: head (100) at the top, body (200) at the center, and terminal (300) at the bottom 15, which have dimensions proportional to those of the reactor and the height of the catalyst bed to be created. Alignment between the three parts is critical to ensure the positioning of the loader within the centralized and vertical tubular reactor such that irregularities in the distribution of the catalyst particles are avoided and level beds in the loading are obtained.

The body (200) is comprised of a feed tube (8) of selected diameter in the range of 4 to 8 inches terminated at its upper end by a perforated ring-shaped flange (7a) to interconnect the body (200) to the head (100) having a gas pipe (6a) rigidly fixed to the inner wall of the feed pipe (8) centrally and longitudinally aligned to connect to terminal (300).

The length of the feed tube (8) is defined according to the height of the catalyst bed to be created, which makes it possible to perform multi-bed oriented loading by simply changing the feed tube (8) according to height of each feed tube bed (8) according to the height of each catalyst bed inside the reactor.

The head (100) consists of a single block, subdivided into tubular segments, as follows: a) a first tubular segment (1) at the top 5 to connect to an external silo, with two lateral eyes (2) for cable support ; b) a second trunk-shaped tubular segment (3) joined to the first tubular segment (1) by its smaller diameter upper opening; c) a third cylindrical tubular segment (4), equal in diameter to that of the body (200), joined to the second tubular member (3) and terminated by a perforated ring-shaped flange (7) interconnecting with the flange ring (7a) of the body (200) by means of adjusting pins which pass through the perforations of the flanges (7a) and (7) and secure the body (200) to the head (100);

d) retractable arms (5) radially fixed to the side wall of the elongated and split tubular segment (4), having a movable part (5a) that slides 15 with the aid of the castors (5c) along a fixed part (5b) and immobilizes within the cavity of the fixed part (5b) by means of locking pins that pass through holes (5d); and e) a flange (6) attached to the side wall of the tubular segment (4) for connecting a gas line from an external source to the interior of the magazine.

The terminal (300) is constituted at its end by a disk

diameter 10 'Ae3A greater than the diameter of the feed pipe (8), superimposed on a blower disc (11) between 1/4 and% smaller in diameter than that of the feed pipe (8), the discs (10) and (11) are fixed by means of an interlocking pin which adjusts the spacing 25 between the surfaces of the discs (10) and (11) to be interconnected to the end of the gas pipe (6a) by means of a sleeve (12) defining the height between the lower end of the body (200) and the surface of the distributing disc (10). This height varies between 10 mm and 21 mm, depending on the diameter of the reactor.

The dispensing disk 10 is comprised of a solid, cylindrical circular metal plate with a central bore. And the blower disc (11) is a solid, radially perforated cylindrical metal circular plate with multiple channels having openings in holes evenly distributed on the side surface for gas passage, 5 with a central bore to connect to the bore. distributor disc center (10) and sleeve (12). The radial channels converge to the central part of the blower disc (11), connecting to the gas pipe (6a) through the sleeve.

(12) to conduct gas entering the sleeve (6) from an external source.

The opening of passage for the catalyst particles between the

main tubular body (8) and the distributing disk (10), account for the best distribution of the catalyst in the dense bed created.

After alignment of its three parts: head (100), body (200) and terminal (300), the charger may be introduced into the reactor for oriented loading of multi-bed catalyst particles, in accordance with the method, in their steps:

a) selecting the three parts for mounting the loader having dimensions proportional to the width of the tubular reactor and the height of the catalyst bed to be loaded;

b) assemble the three parts, sequentially interconnecting: the head

(100) to the body (200) by means of adjusting pins; the gas pipe (6a) to the sleeve (6); and the body (200) to the terminal (300) by means of the sleeve (12);

c) supporting the charger vertically by means of cables that attach to the eyes (2);

d) vertically aligning the gas pipe (6) to the supply pipe (8) with the aid of the head adjusting pins (100) to the body (200);

e) radially aligning the distribution disc (10) and the blower disc (11), perpendicular to the gas pipe (6), with the aid of the sleeve (12);

f) connecting the tubular segment (1) of the head (100) to a catalyst storage silo by means of a hose connected to the silo outlet;

g) connecting the sleeve (6) to an external source of inert gas;

h) sliding the movable part (5a) of the retractable arms (5) with the aid of the casters (5c) along the fixed part (5b) and securing them by means of locking pins (5d);

i) lower the charger inside the reactor with the aid of the cables

to the position corresponding to the height set for the top of the

first catalyst bed;

j) connecting the external source of inert gas so that a uniform flow of gas passes through the blower disc (11) and exits through the side holes;

k) start transfer of catalyst to feed tube

(8);

I) keep the transfer of catalyst from the storage silo to the reactor constant until it reaches the defined bed height inside the reactor;

m) optionally support the charger at the height corresponding to

a second catalyst bed and restarting catalyst transfer from step j) to create a subsequent second bed inside the reactor, repeating this step to create one or more subsequent beds inside the reactor.

According to the method in its steps, the charger described

It is a useful equipment for oriented loading of catalysts in a vertical tubular reactor, and advantageously allows to create multiple beds that are homogeneous and level, with efficiency and operational safety with regard to time and labor.

Claims (6)

1. CATALYTIC PARTICULAR CHARGER FOR A VERTICAL TUBULAR REACTOR, characterized by comprising three interconnected parts: a head (100) at the top, a body (200) at the center and a terminal (300) at the bottom, proportional to the of the reactor and the height of the catalyst bed to be created: a) the head (100) consists of a single block, subdivided into tubular segments, with: a) a first tubular segment (1) at the top to connect to an external silo with two side eyes (2) for cable support; b) a second trunk-shaped tubular segment (3) joined to the first tubular segment (1) by its smaller diameter upper opening; c) a third cylindrical tubular segment (4), of equal diameter to the body (200), joined to the second tubular element (3) and terminated by a perforated ring-shaped flange (7) interconnecting with the flange ring ( 7a) of the body (200) by means of adjusting pins that pass through the perforations of the flanges (7a) and (7) and fix the body (200) to the head (100); d) retractable arms (5) fixed radially to the side wall of the tubular segment (4), elongated and split, having a movable part (5a) that slides with the aid of the casters (5c) along a fixed part (5b) and it immobilizes within the cavity of the fixed part (5b) by means of locking pins that pass through holes (5d); and e) a flange (6) attached to the side wall of the tubular segment (4) for connecting a gas line from an external source to the interior of the magazine; b) the body (200) consisting of a feed tube (8) of selected diameter in the range of 4 to 8 inches terminated at its upper end by a perforated ring-shaped flange (7a) to interconnect the body (200) to the head (100) having a gas pipe (6a) rigidly fixed to the inner wall of the feed pipe (8) centrally and longitudinally aligned to connect to the terminal (300); c) the terminal (300) constituted at its end by a distributing disc (10), with a diameter between 1/4 and 3A larger than the diameter of the supply pipe (8), superimposed on a blower disc (11) with a diameter between Yi is less than that of the feed tube (8), the discs (10) and (11) being fixed by means of an interlocking pin which adjusts the spacing between the surfaces of the discs (10) and (11) to be interconnected to the end of the gas pipe (6a) by means of a sleeve (12) defining the height between the lower end of the body (200) and the surface of the distributing disc (10). CHARGER according to claim 1, characterized in that the distributing disc (10) is a solid cylindrical circular metal plate with a central bore. CHARGER according to claim 1, characterized in that the blower disc (11) is a cylindrical, metallic, radially perforated, multi-channel circular plate with outlets in holes evenly distributed on the side surface for the passage of gas, with a borehole. central to connect to the distributing disk (10) and the sleeve (12). CHARGER according to Claim 3, characterized in that the channels converge on the central part of the blower disc (11), connecting to the gas pipe (6a) by means of the sleeve (12) to guide the incoming gas. by the glove (6). CHARGER according to claims 1, 2, 3 and 4, characterized in that the length of the charger body (200) is defined according to the height of the catalyst bed to be created. TUBULAR REACTOR CATALYST LOADING METHOD, utilizing the loader defined in claim 1, characterized by the following steps: a) selecting the three parts for loader mounting having dimensions proportional to the width of the tubular reactor and the height of the catalyst bed to be loaded; b) assemble the three parts, sequentially interconnecting: the head (100) to the body (200) by means of adjusting pins; the gas pipe (6a) to the sleeve (6); and the body (200) to the terminal (300) by means of the sleeve (12); c) supporting the charger vertically by means of cables that attach to the eyes (2); d) vertically aligning the gas pipe (6) to the supply pipe (8) with the aid of head adjustment pins (100) to the body (200); e) radially aligning the distribution disc (10) and the blower disc (11), perpendicular to the gas pipe (6), with the aid of the sleeve (12); f) connecting the tubular segment (1) of the head (100) to a catalyst storage silo by means of a hose connected to the silo outlet; g) connecting the sleeve (6) to an external source of inert gas; h) sliding the movable part (5a) of the retractable arms (5) with the aid of the casters (5c) along the fixed part (5b) and securing them by means of locking pins (5d); (i) lower the loader into the reactor using the cables to the position corresponding to the height set for the top of the first catalyst bed; j) connecting the external source of inert gas so that a uniform flow of gas passes through the blower disc (11) and exits through the side holes; k) initiate the transfer of the catalyst to the feed tube (8); I) keep the transfer of catalyst from the storage silo to the reactor constant until it reaches the defined bed height inside the reactor; m) optionally supporting the loader at a height corresponding to a second catalyst bed and restarting catalyst transfer from step j) to create a subsequent second bed within the reactor, repeating this step to create one or more subsequent beds in the reactor. inside of the reactor.