Continuous catalyst feeding equipment

Abstract

The utility model discloses continuous catalyst feeding equipment which comprises a catalyst tank, a first discharging pipe is arranged at the bottom of the catalyst tank, a second control valve is installed on the first discharging pipe, a discharging pipeline is connected to the bottom of the first discharging pipe, a discharging device is connected to the lower portion of the discharging pipeline, and a second control valve is installed on the second control valve. The continuous catalyst feeding equipment comprises a discharging device, a fixed air pipe is embedded in the side face of the discharging device, the lower end of the fixed air pipe is connected with an air blowing pipeline located in an inner cavity of the discharging device, and a plurality of air blowing holes are downwards formed in the circumferential face of the air blowing pipeline. The feeding position of the catalyst in the FCC device is changed, the catalyst is not directly injected into the regenerator any more, the catalyst is injected into the settler with the mild temperature condition, and meanwhile, the fresh catalyst is conveyed by adopting nitrogen, dry gas or high-temperature steam, so that the heat collapse rate of the fresh catalyst is reduced, and the loss of the catalyst is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of feeders, in particular to a catalyst continuous feeding device. Background Art

[0002] Normal catalyst wear in FCC units is mainly due to the generation of catalyst fines. Thermal collapse and wear will cause the catalyst to break and increase the fines content. The smaller the catalyst heat transfer temperature difference, the smaller the proportion of thermal collapse of the catalyst. At present, the regeneration temperature of the regenerator is relatively high, and the temperature difference during the catalyst filling process is large. The existing automatic feeding equipment is not suitable for high-temperature conveying media, and the filling process is intermittent, with large pulsation, which is not conducive to the stability of catalyst activity in the FCC unit. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a catalyst continuous feeding device, which is convenient for stable high-temperature continuous delivery of catalyst, reduces the thermal collapse rate of fresh catalyst, reduces catalyst loss, and can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A catalyst continuous feeding device comprises a catalyst tank, a first discharge pipe is provided at the bottom of the catalyst tank, a second control valve is installed on the first discharge pipe, a discharge pipe is connected to the bottom of the first discharge pipe, a discharge device is connected to the lower part of the discharge pipe, a fixed air duct is embedded in the side of the discharge device, a blowing pipe is connected to the lower end of the fixed air duct located in the inner cavity of the discharge device, a plurality of blowing holes are opened downward on the circumference of the blowing pipe, a first corrugated pipe is connected to the upper end of the fixed air duct, a conveying air duct is connected to the end of the first corrugated pipe, a first control valve is installed on the circumference of the fixed air duct and at a position outside the discharge device, a second discharge pipe is connected to the upper part of the side of the discharge device, a second discharge pipe is connected to the end of the second discharge pipe, a second corrugated pipe is connected to the end of the second corrugated pipe, a first feeding pipe is connected to the end of the first feeding pipe, and a settler is connected to the end of the first feeding pipe.

[0006] As a preferred technical solution of the utility model, a third bellows is connected to the feed channel of the catalyst tank, a feed pipe is connected to the top of the third bellows, and a feed valve is installed on the feed pipe.

[0007] As a preferred technical solution of the utility model, a second material delivery pipeline is connected between the blowing pipeline and the upper part of the catalyst tank, and a third control valve is installed on the second material delivery pipeline.

[0008] As a preferred technical solution of the utility model, the bottom of the discharge pipe extends to the lower part of the inner cavity of the discharger.

[0009] As a preferred technical solution of the utility model, the blowing duct is annularly sleeved on the lower part of the circumference of the discharge duct.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] This equipment is convenient for reducing the initial contact temperature difference between the catalyst and the balance agent in the system, changing the catalyst feeding position in the FCC unit, no longer directly adding the catalyst into the regenerator, but injecting the catalyst into the settler with milder temperature conditions, and using nitrogen, dry gas or high-temperature steam to transport fresh catalyst to reduce the thermal collapse rate of the fresh catalyst and reduce catalyst loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model.

[0013] Figure 2 It is a schematic diagram of the internal partial cross-sectional structure of the discharger of the utility model.

[0014] In the figure: catalyst tank 1, first discharge pipe 2, first control valve 3, conveying air duct 4, first bellows 5, discharge pipe 6, discharger 7, second discharge pipe 8, second bellows 9, second control valve 10, third control valve 11, first feed pipeline 12, second feed pipeline 13, settler 14, feed valve 15, feed pipeline 16, third bellows 17, blowing pipe 18, blowing hole 19, fixed air duct 20. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-2 , the utility model provides a technical solution:

[0017] A catalyst continuous feeding device comprises a catalyst tank 1, a first discharge pipe 2 is provided at the bottom of the catalyst tank 1, a second control valve 10 is installed on the first discharge pipe 2, a discharge pipe 6 is connected to the bottom of the first discharge pipe 2, a discharger 7 is connected to the lower part of the discharge pipe 6, a fixed air duct 20 is embedded in the side of the discharger 7, a blowing pipe 18 located in the inner cavity of the discharger 7 is connected to the lower end of the fixed air duct 20, a plurality of blowing holes 19 are opened downward on the circumference of the blowing pipe 18, a first corrugated pipe 5 is connected to the upper end of the fixed air duct 20, a conveying air duct 4 is connected to the end of the first corrugated pipe 5, a first control valve 3 is installed on the circumference of the fixed air duct 20 and at a position outside the discharger 7, a second discharge pipe 8 is connected to the upper part of the side of the discharger 7, a second corrugated pipe 9 is connected to the end of the second discharge pipe 8, a first feed pipe 12 is connected to the end of the second corrugated pipe 9, a settler 14 is connected to the end of the first feed pipe 12.

[0018] A third bellows 17 is connected to the feed channel of the catalyst tank 1 , a feed pipe 16 is connected to the top of the third bellows 17 , and a feed valve 15 is installed on the feed pipe 16 .

[0019] A second material delivery pipeline 13 is connected between the blowing pipeline 18 and the upper portion of the catalyst tank 1 , and a third control valve 11 is installed on the second material delivery pipeline 13 .

[0020] The bottom of the discharge pipe 6 extends to the lower part of the inner cavity of the discharger 7 .

[0021] The blowing duct 18 is annularly sleeved on the lower part of the circumference of the discharge duct 6 .

[0022] The catalyst in the catalyst tank 1 automatically flows into the discharger 7 through the discharge pipe 6 and accumulates at the bottom of the discharger 7, blocking the excess catalyst in the catalyst tank 1 from continuing to flow in. When the delivery air is blown to the surface of the accumulated catalyst through the delivery air duct 4 and the fixed air duct 20 in conjunction with the blowing pipe 18 and the blowing hole 19, the catalyst on the accumulation surface is lifted up, so that a dilute phase area with catalyst particles is formed on the upper part of the accumulation surface. The catalyst enters the second discharge pipe 8 through the discharge port. The feeding speed of the discharger 7 can be controlled by changing the purge delivery air volume. When the amount of catalyst accumulation at the bottom of the discharger 7 decreases, the catalyst in the catalyst tank 1 will automatically replenish the catalyst to the discharger 7 through the discharge pipe 6.

[0023] The catalyst tank 1 is placed on three weighing sensors. In addition to being in contact with the weighing sensors, the catalyst tank 1 is also connected to other external pipelines by means of elastic bellows (first bellows 5, second bellows 9 and third bellows 17). The entire feeding system is in an elastic environment and can be weighed. The change (reduction) in the weight of the catalyst in the catalyst tank 1 per unit time can be measured to know the catalyst conveying speed. By adjusting the air volume of the conveying air through the first control valve 3, the catalyst conveying speed can be controlled. The weight reduction values ​​of the feeder in each time period are accumulated to obtain the cumulative value of the feeding amount.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A catalyst continuous feeding device, comprising a catalyst tank (1), characterized in that: The bottom of the catalyst tank (1) is provided with a first discharge pipe (2), a second control valve (10) is installed on the first discharge pipe (2), the bottom of the first discharge pipe (2) is connected to a discharge pipe (6), the lower part of the discharge pipe (6) is connected to a discharger (7), a fixed air duct (20) is embedded in the side of the discharger (7), the lower end of the fixed air duct (20) is connected to a blowing pipe (18) located in the inner cavity of the discharger (7), a plurality of blowing holes (19) are opened on the circumference of the blowing pipe (18) facing downwards, and the fixed air duct (20) is provided with a plurality of blowing holes (19) on the circumference of the blowing pipe (18) facing downwards. The upper end of the tube (20) is connected to a first bellows (5), the end of the first bellows (5) is connected to a conveying air duct (4), a first control valve (3) is installed on the circumference of the fixed air duct (20) and at a position outside the discharger (7), the upper part of the side of the discharger (7) is connected to a second discharge pipe (8), the end of the second discharge pipe (8) is connected to a second bellows (9), the end of the second bellows (9) is connected to a first conveying pipeline (12), and the end of the first conveying pipeline (12) is connected to a settler (14).

2. The catalyst continuous feeding device according to claim 1, characterized in that: The feed channel of the catalyst tank (1) is connected to a third bellows (17), the top of the third bellows (17) is connected to a feed pipeline (16), and a feed valve (15) is installed on the feed pipeline (16).

3. The catalyst continuous feeding device according to claim 1, characterized in that: A second material delivery pipeline (13) is connected between the blowing pipeline (18) and the upper part of the catalyst tank (1), and a third control valve (11) is installed on the second material delivery pipeline (13).

4. The catalyst continuous feeding device according to claim 1, characterized in that: The bottom of the discharge pipe (6) extends to the lower part of the inner cavity of the discharger (7).

5. The catalyst continuous feeding device according to claim 1, characterized in that: The blowing pipe (18) is annularly sleeved on the lower part of the circumference of the discharge pipe (6).

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