KR101652598B1 - Catalyst regeneration apparatus - Google Patents

Abstract

The present invention relates to a regeneration apparatus for regenerating catalyst particles, the regeneration apparatus comprising: a first catalyst separator for removing catalyst residues and contaminants from the supplied catalyst; A second catalyst separator for additionally separating and purifying unremoved catalyst residues and contaminants provided in the first catalyst separator, and a main body integrally formed with the first catalyst separator, Wherein the catalyst is continuously passed through the combustion zone, the chlorination zone and the drying zone into the mobile phase in the body, the body comprising a body comprising at least two radial combustion zones The present invention relates to a catalyst regeneration apparatus, and more particularly, to a catalyst regeneration apparatus in which a reactor main body is integrally formed with a first catalyst separator, and the separation and sorting of the catalyst proceeds in two steps to improve the regeneration reaction efficiency.

Description

[0001] CATALYST REGENERATION APPARATUS [0002]

The present invention relates to a catalyst regeneration apparatus, and more particularly, to a catalyst regeneration apparatus that effectively removes catalyst residues and contaminants to reduce clogging in a screen to improve the productivity of a regeneration reactor.

In the petrochemical industry, continuous catalytic conversion proceeds. Fluidized Catalyst Cracking is an important process in the production of light hydrocarbon components and an important process in the production of ethylene and propylene. In the flow catalytic cracking process, the fluidized catalyst is continuously circulated between the reactor and the regenerator.

The catalytic conversion reaction is mostly an endothermic reaction. Catalyst dehydrogenation for propylene production, for example, is a strong endothermic reaction and requires high temperatures to proceed at a satisfactory rate. As the catalytic reaction progresses at a high temperature, a side reaction therewith involves pyrolysis and coke formation reaction, and the degree of such side reaction is a key factor determining the selectivity and activity of the catalyst. One of the side reactions, the coke formation reaction, covers the active material on the catalyst with coke, thereby blocking the contact with the reactants, thereby lowering the overall reaction conversion rate. Further, as the production of coke proceeds, the inlet of the pores existing in the catalyst is blocked to dampen the active substance present in the pores, thereby promptly promoting deactivation. Thus, when the accumulation of coke deposits causes inactivation in the next stage of the dehydrogenation reactor, a catalyst regenerator is connected to regenerate the catalyst to regain the activity of the catalyst to remove coke deposits.

The catalyst regeneration apparatus in mobile phase mode generally comprises a reaction zone which may comprise a series of three or four reactors and a reaction zone comprising any number of stages, generally the combustion stage, the subsequent chlorination stage, Is used.

Referring to FIG. 1, U.S. Patent Application No. 2008/0159930 discloses a disinfection hopper 320 having an upper end and a lower end to remove catalyst contaminants and catalyst particles from a hydrocarbon conversion zone, Discloses a catalyst regeneration apparatus for a hydrocarbon conversion catalyst comprising a hydrocarbon conversion zone which is in communication with a hydrocarbon conversion zone (320) including a adsorption vessel (400) for receiving chlorinated gas and a regeneration vessel (420) .

However, in such a conventional catalyst regenerating apparatus, the disinfection hopper is disposed in a separate space above the regenerating reactor, and the apparatus is complicated in construction, resulting in an increase in facility cost and difficulty in operation and management.

SUMMARY OF THE INVENTION An object of the present invention is to overcome the problems of the prior art described above. One object of the present invention is to simplify the structure of a catalyst regeneration device, reduce facility cost, and improve the efficiency of a catalyst regeneration reaction.

Another object of the present invention is to improve process productivity by minimizing catalyst damage by suppressing hot spots inside the reactor by effectively controlling the flow of the gas in the combustion zone and the chlorination zone of the catalyst regenerator do.

It is another object of the present invention to solve the problem caused by catalyst clogging during catalyst regeneration because the gas circulation is the same as the catalyst flow from the upper part to the lower part in the combustion zone having a high coke content in the catalyst, To easily remove remaining coke, and to improve the efficiency and stability of the catalyst regeneration process by suppressing occurrence of hot spot due to good air dispersion in the chlorination zone.

According to an aspect of the present invention,

A regeneration device for regenerating catalyst particles, wherein the regeneration device

A first catalyst separator for removing catalyst residues and contaminants from the supplied catalyst; A second catalyst separator for additionally separating and purifying unremoved catalyst residues and contaminants installed in the first catalyst separator,

A main body formed integrally with the first catalyst separator, the main body comprising at least one feed gas inlet tube and a catalyst outlet pipe for discharging the regenerated catalyst, the catalyst being arranged in the main body as a mobile phase, Characterized in that the body comprises a body comprising at least two radial combustion zones.

The combustion zone is provided with a screen dispersing plate for dispersing and injecting a supply gas into the center of the reactor so that the supply gas is injected through the screen dispersing plate.

The combustion zone and the chlorination zone are in the form of annular discs, the catalyst bed is flowed in a annular reaction zone defined by two coaxial cylindrical walls, the gas is introduced via one wall, To be discharged via the pipe.

In the catalyst regenerating apparatus of the present invention, the catalyst is passed between the combustion zone and the chlorination zone, and the barrier layer is impermeable to the gas, so that the gas circulation manner of the combustion zone and the chlorination zone are different from each other.

According to various embodiments of the present invention, the flow regime of the combustion zone and the chlorination zone in the catalyst regenerator can be effectively controlled to suppress the hot spot inside the reactor, thereby minimizing the catalyst damage and improving the productivity of the catalyst regeneration process have.

In addition, according to the present invention, the gas circulation in the combustion zone having a high coke content in the catalyst is the same as the flow of the catalyst in the downward direction from the top, thereby preventing problems caused by catalyst clogging during catalyst regeneration.

According to the present invention, it is possible to smoothly disperse the gas in the drying zone so that the remaining amount of the coke can be easily removed, and the air can be well dispersed in the chlorination zone, thereby suppressing occurrence of hot spot.

1 is a schematic view of a conventional catalyst regeneration apparatus.
2 is a schematic view of a catalyst regeneration apparatus according to an embodiment of the present invention.
3 is a schematic cross-sectional view of a triangular-pyramidal auxiliary plate of a catalyst regeneration apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The embodiments of the present invention are shown by way of example and are not limited to the features of the accompanying drawings. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. In the following, similar components will be described using similar reference numerals.

As used herein, the term " zone "refers to a specific area within a catalyst regenerator that includes at least one device or sub-zone, and the body of the catalyst regenerator in the present invention may include one or more zones And may include sub-zones.

2 is a schematic diagram of an apparatus for regenerating a catalyst according to an exemplary embodiment of the present invention. Referring to FIG. 2, the catalyst regeneration apparatus of one embodiment of the present invention includes a first catalyst separator 1 for removing catalyst residues and contaminants from supplied catalysts; A second catalyst separator (40, 50) for additionally separating and purifying unremoved catalyst residues and contaminants provided in the first catalyst separator, and a main body integrally formed with the first catalyst separator (1) And a catalyst outlet pipe (9) for discharging the regenerated catalyst, wherein the catalyst is introduced into the combustion zone (10, 10 '), the chlorination zone (10, 10' 20, 20 'and a drying zone 30, the body comprising a body comprising at least two radial combustion zones 10, 10'.

After the residue and contaminants are separated in the first catalyst separator 1, the second catalyst separator further separates the pollutants. The second catalyst separator includes a pollutant collector 40 for collecting dust, And a catalyst residue collector 50 for collecting fine catalyst microparticles. In the catalyst regenerating apparatus of the present invention, since the pollutants and the catalyst fine particles not separated in the first catalyst separator 1 are secondarily separated by the second catalyst separators 40 and 50, the screen clogging in the regenerator is reduced The cleaning cycle of the regenerating reactor can be shortened and the productivity can be improved.

      In the first catalyst separator, the method of separating the residues and contaminants such as the catalyst is a method of separating the contaminants from the catalyst, , 10 '). In the second catalyst separator, the pollutant collector 40 separates the residues separated from the first catalyst separator and the pollutant-containing fluid by centrifugal separation, ), And the dense high-residue remnants and contaminants are accumulated at the bottom, and the fluid enters the first catalyst separator again through the upper exhaust port of the pollutant collector to separate the foreign substances in the catalyst. In the second catalyst separator, the catalyst residue collector 50 adjusts the interval between the screens with the upper screen structure, so that the catalyst particles having a constant size are moved to the combustion zones 10 and 10 'without passing through the screen, The catalyst fine particles pass through the screen and accumulate in the catalyst remnant collector 50, thereby separating the catalyst fine particles.

      Since the pollutant collector 40 and the catalyst remnant collector 50 in the second catalyst separator are auxiliary devices of the first catalyst separator, they perform their functions by removing the residues and contaminants accumulated in the catalyst regenerator during the repair period .

The combustion zone may be provided with a screen dispersing plate 11 for dispersing the feed gas into the center of the reactor so that the feed gas is injected through the screen dispersing plate. The screen distribution plate 11 is a donut-shaped plate-like structure including a plurality of orifices on a front surface or a side surface of a tube-shaped tube, which is in contact with the screen. This screen diffusing plate makes it possible to smoothly control the flow rate of the fluid.

In the catalyst regenerating apparatus of the present invention, the combustion zone and the chlorination zone are formed in an annular disc shape, and the catalyst bed is flowed in a annular reaction zone divided by two coaxial cylindrical walls, and the gas is introduced via one wall , And is discharged via the opposite wall.

The combustion zone is provided with one or more conduits 5 for introducing an oxygen-containing gas into the combustion zone 10, 10 ', starting from the lower end of the combustion zone and extending past the combustion zone 10, 10' To the side of the combustion zone at the top of the combustion chamber.

At least one conduit 14 for discharging gas from the combustion zone 10, 10 'is connected to the bottom of the combustion zone. Therefore, in the combustion zones 10 and 10 ', the gas circulation is the same as the catalyst flow from the upper part to the lower part, thereby preventing the problem caused by the catalyst clogging in the catalyst regeneration.

By separately managing the gases in each combustion zone, the inlet and outlet gas temperatures and their oxygen content can be accurately known at any time. In addition to maximum oxygen use, this management can control the coking combustion by adjusting the operating conditions within each zone.

After combustion, a catalyst having a reduced content of carbon-containing material passes through the conduit 12 and reaches the chlorination zone 20, 20 '. Thereafter, it flows into the drying zone 30 and is discharged from the main body via the catalyst outlet pipe 9.

Between the combustion zone 10, 10 'and the chlorination zone 20, 20' a plate or any other blocking plate 15 is arranged to pass the catalyst but not the gas. Conversely, the gas is freely circulated from the drying zone 30 to the chlorination zone 20, 20 '.

One or more conduits (7) for introducing a chlorinating agent into the chlorination zone and one or more conduits (7) formed upstream of the chlorination zone and located in the middle of the chlorination zone in the chlorination zone (20, 20 ' The conduit 6 is connected so that the circulation of the gas takes place from the lower to the upper direction. Thus, the gas circulation manner of the combustion zone 10, 10 'and the chlorination zone 20, 20' is configured to be different from each other.

The chlorination zone 20, 20 'is supplied with at least one chlorinating agent, at least one oxygen-containing gas and water. The chlorinating agent may be chlorine, HCl or chlorinated hydrocarbons (e.g., carbon tetrachloride) containing less than 4 carbon atoms and 1 to 6 chlorine atoms or any chlorinating agent known to release chlorine in such a catalyst regeneration process . It is preferable to introduce an oxygen-containing gas. If the chlorination zone is in the axial direction, it is advantageous to introduce it into the lower part of the chlorination zone so as to flow countercurrently to the catalyst.

In the chlorination zone 20, 20 ', the catalyst is contacted with the introduced gas, and is also contacted with the gas from the drying zone 30, and can be charged, recharged with oxygen and containing a small amount of water from the drying step have.

The catalyst regenerating apparatus of the present invention may include a screen dispersing plate 11 in which the horizontal cross-sectional area of the combustion zone 10, 10 'is increased toward the lower end of the body to control the flow rate of the catalyst.

Further, the catalyst regeneration apparatus according to an embodiment of the present invention may further include an inverted triangular-pyramid type auxiliary plate 35 for allowing the regenerated catalyst particles to be discharged smoothly without stagnation at the lower end of the main body. As shown in FIG. 3, the inverted triangular-pyramid type auxiliary plate 35 is composed of an inverted triangular pyramid having a vertex at an upper portion and a wider portion at a lower end, and an empty hollow portion. A catalyst layer and an empty space are formed therebetween, So that the catalyst can be discharged smoothly without stopping the gravity.

The drying zone 30 may include one or more means for cooling the gas, one or more means for treating the gas to remove impurities, one or more means for drying the gas, and one or more means for compressing the gas .

Hereinafter, the operation of the catalyst regenerating apparatus of the present invention will be described.

Referring to Figure 2, a stream containing spent catalyst particles comprising coke deposits is provided. In order to maintain or restore the catalytic activity of the spent catalyst particles, the spent catalyst particles must be regenerated, i.e. almost all of the coke must be removed from the spent catalyst particles.

The spent catalyst particles are separated and removed from the first catalyst separator 1 by the second catalyst separator 40 and 50 after the pollutant such as dust and the catalyst fine particles are separated and removed, 50). The catalyst particles, from which pollutants and residues are sufficiently removed, are introduced into the combustion zones 10, 10 '.

 The removal of the coke from the spent catalyst particles is effected by combustion in the combustion zone 10, 10 'of the apparatus 100. As shown, the combustion zones 10, 10 'include a first combustion zone 10 and a second combustion zone 10'.

The coke on the spent catalyst particles in the combustion zone 10, 10 'is burned. As shown, the catalyst regeneration apparatus 100 of the present invention also has at least one inlet 5 for supplying the combustion gas containing oxygen to the combustion zone 10, 10 '. In order to control the combustion of the coke in the combustion zone 10, 10 ', the oxygen content of the environment in the combustion gas and combustion zone is tightly controlled. After the combustion of the coke in the combustion zone 10, 10 ', the discharged gas is exhausted through one or more outlets 14 and some of the discharged gas goes to the removal facility for chlorine gas concentration control, Is re-introduced into the inlet (5) of the zone (10, 10 '). In order to keep the oxygen concentration in the combustion zones 10, 10 'constant, additional oxygen or air is injected and mixed.

The spent catalyst particles can be regarded as catalyst particles since they exit the combustion zone 10, 10 'after coke combustion. The catalyst particles migrate down the device 100 from the combustion zone 10, 10 'via the conduit 12 to the chlorination zone 20, 20'. Chlorinated gas is fed into the chlorination zone 20, 20 'through at least one inlet 5. The chlorinated gas includes a halogen-containing gas such as chlorine and an oxygen-containing gas such as air. 2, a single inlet 7 is illustrated as feeding a combined stream of halogen-containing gas and oxygen-containing gas to the chlorination zone 20, 20 ', but separate inlet For example. The presence of a halogen-containing gas and an oxygen-containing gas in the chlorination zone 20, 20 'is supplied for chlorination of the catalyst particles. Chlorination is essential because the platinum group metals in the catalyst particles experience aggregation at high temperatures encountered during processing. The aggregated platinum group metal on the catalyst particles is redispersed for better catalytic activity than the chlorination reaction.

The catalyst particles after chlorination can be regarded as chlorinated catalyst particles. The chlorinated catalyst particles are directed from the chlorination zone 20, 20 'to the drying zone 30 in the apparatus 100. In the steady state mode, the heated dry gas is supplied to the drying zone 30 through at least one inlet 7. The dry gas may comprise an oxygen containing gas such as an inert gas, a halogen containing gas and / or air. In the drying zone 30, the drying gas is vented through the catalyst particles to remove water due to the upstream reaction.

2, a single inlet 8 shows an exemplary embodiment for supplying a combined stream of different gases to the drying zone 30, but a separate inlet is provided for separate transport of various gases .

In one embodiment of the present invention, the drying zone 30 is in fluid communication with the chlorination zone 20, 20 'so that the gas required for the chlorination zone 20, 20' is passed through the drying zone 30 to the chlorination zone As shown in FIG. The gas from the chlorination zone 20, 20 'can be removed from the apparatus 100 via conduit 6. Some of the gas removed through the conduit 6 in the chlorination zone is transferred to the chlorination unit and most of the gas is recycled back into the inlet 7. At this time, in order to adjust the chlorine concentration uniformly, the amount of the chlorine is injected through the inlet 7.

2, the regenerated catalyst particles may exit the apparatus 100 after passing through the drying zone 30 and may be fed back to the catalytic reforming system or another catalytic system and the combustion zone 10, 10 ' ) ≪ / RTI > of the spent catalyst particles. In the case of a drying zone, oxygen is supplied and discharged through at least one conduit 8 and is discharged through the conduit 6 past the center of the chlorination zone 20, 20 'and back to the chlorination zone 20, 20' Through the conduit (7) of the conduit (7).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope thereof, The true scope of protection of the present invention should be defined in the scope including the appended claims and their legal equivalents.

1: first catalyst separator 40: dust collector
50: Catalyst residue collector 10, 10 ': combustion zone
20, 20 ': chlorination zone 30: drying zone
11: Screen diffuser plate

Claims (10)

A regeneration device for regenerating catalyst particles, wherein the regeneration device
A first catalyst separator for removing catalyst residues and contaminants from the supplied catalyst; A second catalyst separator for additionally separating and purifying unremoved catalyst residues and contaminants installed in the first catalyst separator; And
A main body formed integrally with the first catalyst separator, the main body comprising at least one feed gas inlet tube and a catalyst outlet pipe for discharging the regenerated catalyst, the catalyst being arranged in the main body as a mobile phase, Wherein the body comprises two or more radial combustion zones,
Wherein the combustion zone is provided with a screen dispersing plate having a donut-shaped plate-like structure including a plurality of orifices for dispersing a feed gas into the center of the reactor, and the feed gas is injected through the screen dispersing plate. .
delete The apparatus of claim 1, wherein the combustion zone and the chlorination zone are configured in an annular disc shape and the catalyst bed is configured to flow in a annular reaction zone defined by two coaxial cylindrical walls.
The catalyst regenerating apparatus according to claim 1, wherein a catalyst layer is provided between the combustion zone and the chlorination zone in the catalyst regenerating apparatus, and a barrier layer is provided so as to be impermeable to gas, so that the gas circulation manner of the combustion zone and the chlorination zone are different from each other Wherein the catalyst regeneration apparatus comprises:
The catalyst regenerating apparatus according to claim 1, wherein the catalyst regenerating apparatus includes at least one conduit for introducing an oxygen-containing gas into the combustion zone, wherein the conduit is provided at a lower end of the combustion zone, And the catalyst is regenerated.
The method of claim 1, wherein the chlorination zone of the body is disposed in the middle of the chlorination zone, the at least one conduit for introducing a chlorinating agent into the chlorination zone, Wherein at least one conduit is connected.
The catalyst regenerating apparatus according to claim 1, wherein the catalyst regeneration apparatus includes means for expanding the cross-sectional area of the combustion zone in the horizontal direction toward the lower end of the main body to control the flow rate of the catalyst.
The catalyst regeneration apparatus according to claim 1, wherein the catalyst regeneration apparatus further comprises an inverted triangular-pyramid assist plate for allowing the regenerated catalyst particles to be discharged smoothly without stagnation at the lower end of the main body.
The method of claim 1, wherein the drying zone comprises one or more means for cooling the gas, one or more means for treating the gas to remove impurities, one or more means for drying the gas, Wherein the catalyst regeneration means includes a catalyst regeneration means.
The catalyst regenerating apparatus according to claim 1, wherein the screen dispersing plate is a tube having a tube shape, and has a structure including a plurality of orifices on a front surface or side surfaces contacting the screen.

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