Impurity sieving device for spent catalyst lifter

Abstract

The impurity screening device for the spent catalyst lifter comprises a filter cylinder capable of being arranged in a main pipeline of the spent catalyst lifter, the filter cylinder comprises a first screening cylinder part and a second screening cylinder part which are sequentially arranged from top to bottom, and the diameter of the first screening cylinder part is larger than that of the second screening cylinder part; a communicated transition screen drum part is arranged between the first screen drum part and the second screen drum part, and a screen is arranged in a port of the lower end of the second screen drum part. The lower portion of the second screen drum is divided into two areas through the partition plate, the anti-accumulation area is closed through the inclined screen, screened impurities are prevented from completely covering the screen, and materials falling into the filter drum are guided to the upper end of the inclined screen through the inclined guide plate to be screened. The impurities left on the inclined screen can slide down to the accumulation area to wait for cleaning, and are blocked by the inclined screen, so that the accumulation condition caused by the fact that part of the catalyst cannot be screened is avoided, the cleaning frequency of the filter cylinder is reduced, and the screening efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of catalyst production, in particular to a debris screening device for a catalyst lifter to be produced. Background Art

[0002] The catalyst to be regenerated refers to the catalyst with carbon deposits on the surface that comes out of the stripping section of the settler after the catalytic reaction. After the catalyst to be regenerated flows out from the bottom of the reactor, it will enter its specific lifting system lifter for the next process. However, if there are debris or coke blocks in the catalyst to be regenerated, it is easy to cause the "L valve group" at the bottom of the catalyst to be regenerated lifter to be blocked, which will affect the lifting of the catalyst to be regenerated. Once the blockage is serious, the lifting system to be regenerated needs to be stopped for processing, which seriously affects production efficiency. In order to solve the problem that debris or coke blocks easily block the pipeline, the prior art has a technical solution similar to Reference 1;

[0003] Reference 1: Chinese patent with publication number CN220328082U;

[0004] Reference 1: discloses a device for removing impurities from a catalyst to be regenerated, comprising a catalyst lifter to be regenerated and a filter screen arranged in the catalyst lifter to be regenerated, through which impurities or coke blocks in the catalyst to be regenerated are filtered to prevent them from entering the "L valve group" at the bottom of the catalyst lifter, and the filter screen is arranged as a four-section structure from top to bottom, the first section is a cylindrical filter screen with upper and lower openings, and the total outer diameter is the same as the inner diameter of the main pipeline; the third section is a cylindrical speed screen with an outer diameter smaller than that of the first section, and a circular filter screen is arranged at the bottom seal; the second section is a transition section between the first section and the third section, which is a conical filter screen.

[0005] When the device is working, the catalyst to be regenerated flows from the reactor to the catalyst to be regenerated lifter by gravity, flows into the main pipeline through the branch pipe, and passes through the circular filter screens at the bottom of the first to third sections of the filter screen in turn; when debris or coke gradually accumulates and there is too much debris above the circular filter screen, the catalyst flows out from the side walls of the second and third sections. When the debris is blocked to the point of affecting the catalyst lifting, the circulation can be stopped and the impurities in the filter screen can be cleaned. The device can remove the debris in the catalyst to be regenerated at the beginning of the operation and ensure the normal circulation of the catalyst. At the same time, it can shorten the parking time caused by the blockage of the catalyst lifting pipeline.

[0006] However, the fall of the catalyst to be generated is vertical falling due to gravity, and it falls directly onto the circular filter. When the circular filter is covered with debris intercepted, the catalyst falling on top of the accumulated debris will not be able to pass through the sieve and fall. Over time, a large amount of catalyst will easily accumulate. At the same time, the aperture of the side walls of the second and third sections of the filter will not be much larger than the size of the catalyst to prevent the outflow of debris. Due to the friction of the accumulated catalyst, the catalyst accumulated on top of the debris will not flow out smoothly from the side walls of the second and third sections of the filter. Therefore, the filter is easily clogged with debris and catalyst, and the blocked impurities and catalyst in the filter need to be cleaned frequently. Utility Model Content

[0007] The utility model aims to provide a debris screening device for a catalyst lifter to be regenerated, which can improve the filtering efficiency of the catalyst to be regenerated and reduce the cleaning frequency of the filter screen.

[0008] In order to solve the deficiencies of the above-mentioned technical problems, the utility model adopts the following technical solutions: a debris screening device for a catalyst lifter to be generated, comprising a filter cylinder that can be arranged in the main pipeline of the catalyst lifter to be generated, the filter cylinder comprising a first screen cylinder part and a second screen cylinder part that are arranged in sequence from top to bottom, the diameter of the first screen cylinder part is larger than the diameter of the second screen cylinder part, the first screen cylinder part and the second screen cylinder part are connected through a transition screen cylinder part, a screening mesh is arranged in the lower end port of the second screen cylinder part, a partition that divides the lower part of the second screen cylinder part into an anti-accumulation zone and an accumulation zone is arranged on the screening mesh, an inclined screening mesh is arranged at the entrance of the anti-accumulation zone to prevent debris from entering, the upper end of the inclined screening mesh is connected to the inner wall of the second screen cylinder part, the lower end of the inclined screening mesh is connected to the upper end of the partition, and an inclined material guide plate that guides materials to fall to the upper end of the inclined screening mesh is arranged above the inclined screening mesh.

[0009] As a further optimization of the debris screening device for the spent catalyst lifter of the utility model, there is a gap between the transition sieve cylinder part and the second sieve cylinder part and the main pipeline of the lifter.

[0010] As a further optimization of the debris screening device for the catalyst lifter to be produced according to the utility model, the gap between the transition sieve cylinder part and the second sieve cylinder part and the main pipeline of the lifter is 10-20 cm.

[0011] As a further optimization of the debris screening device for the catalyst lifter to be regenerated of the utility model, a conical dispersion head is provided in the filter cylinder on the same axis as the filter cylinder, the small diameter end of the conical dispersion head is located in the first screen cylinder part, and the large diameter end of the conical dispersion head is located in the transition screen cylinder part.

[0012] As a further optimization of the debris screening device for the catalyst lifter to be produced according to the utility model, the conical dispersing head is a hollow structure.

[0013] As a further optimization of the debris screening device for the catalyst lifter to be regenerated according to the utility model, a support frame which is cooperatively connected with the main pipeline of the catalyst lifter to be regenerated is provided at the lower end of the second screen cylinder.

[0014] As a further optimization of the debris screening device for the catalyst lifter to be regenerated according to the utility model, the inner angle between the inclined screening mesh and the partition is 125°-150°.

[0015] As a further optimization of the debris screening device for the spent catalyst lifter of the utility model, the inclined material guide plate is fixedly welded to the inner wall of the second screen cylinder part.

[0016] The utility model has the following beneficial effects:

[0017] 1. The utility model divides the lower part of the second screen cylinder into two areas by a partition, and closes the anti-accumulation area by tilting the screen to prevent the screened debris from completely covering the screen. The inclined material guide plate guides the material falling into the filter cylinder to the upper end of the inclined screen for screening. The debris left on the inclined screen will slide down to the accumulation area to wait for cleaning. The inclined screen is used to block it, so as to avoid the situation where some catalysts cannot be screened and cause accumulation, reduce the cleaning frequency of the filter cylinder, and improve the screening efficiency.

[0018] 2. In further optimization of the present embodiment, a conical dispersing head is provided in the filter cylinder on the same axis as the filter cylinder. After the material dropped from the first screen cylinder falls on the conical dispersing head, it can slide down along the inclined direction of the conical dispersing head and rush down toward the side wall of the transition screen cylinder. In the process of rushing down, part of the material can pass through the sieve holes of the transition screen cylinder and be screened in advance, thereby reducing the screening pressure of the screen and the inclined screen and improving the screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the screening device of the utility model;

[0020] Figure 2 It is a schematic cross-sectional view of the screening device of the utility model;

[0021] Figure numerals: 1. filter cylinder, 101. first screen cylinder part, 102. transition screen cylinder part, 103. second screen cylinder part, 104. screen, 105. support frame, 2. conical dispersion head, 3. connecting rod, 4. inclined material guide plate, 5. partition, 6. inclined screen. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] like Figure 1-2 As shown, the utility model provides a debris screening device for a catalyst lifter to be regenerated, which is used to improve the filtering efficiency of the catalyst to be regenerated and reduce the cleaning frequency of the filter. The screening device is similar to the prior art in that it includes a filter cylinder 1 that can be set in the main pipeline of the catalyst lifter to be regenerated, and the material entering the main pipeline of the catalyst lifter to be regenerated will enter the filter cylinder 1, and the debris will be filtered by the filter cylinder 1 to prevent the debris from clogging the inside of the lifter.

[0024] The filter cylinder 1 comprises a first screen cylinder part 101 and a second screen cylinder part 103 arranged in sequence from top to bottom, the diameter of the first screen cylinder part 101 is larger than the diameter of the second screen cylinder part 103, a transitional screen cylinder part 102 is arranged between the first screen cylinder part 101 and the second screen cylinder part 103, and a screen 104 is arranged in the lower end port of the second screen cylinder part 103. The outer diameter of the first screen cylinder part 101 is consistent with the inner diameter of the main pipeline of the catalyst lifter to be produced, and the material will fall into the filter cylinder 1 when falling in the main pipeline of the lifter, and will be discharged to the outside of the filter cylinder 1 after being screened by the screen 104, and the foreign matter in the material will be temporarily retained in the filter cylinder 1 after being filtered by the screen 104.

[0025] There is a gap between the transition sieve cylinder part 102 and the second sieve cylinder part 103 of the filter cylinder 1 and the main pipeline of the lifter. When too much foreign matter is accumulated on the screen 104, the material falling on the foreign matter can flow out from the sieve holes on the side walls of the transition sieve cylinder part 102 and the second sieve cylinder part 103, and be discharged into the main pipeline of the lifter through the gap. In this embodiment, the gap between the transition sieve cylinder part 102 and the second sieve cylinder part 103 and the main pipeline of the lifter is 10-20 cm.

[0026] In this embodiment, a support frame 105 is provided at the lower end of the second screen drum 103, which is connected to the main pipeline of the catalyst lifter to be regenerated. The connection between the support frame 105 and the inner wall of the main pipeline of the catalyst lifter to be regenerated is a common method in the industry, and no further description is given here.

[0027] The screening device of the present invention is different from the prior art in that: a partition 5 is provided on the screen 104, which divides the lower part of the second screen cylinder 103 into an anti-accumulation area and an accumulation area. The anti-accumulation area prevents the accumulation of sieved debris, and the accumulation area is used to accumulate the sieved debris to prevent the sieved debris from completely covering the screen 104 and reducing the screening efficiency of the filter cylinder 1.

[0028] In order to prevent debris from entering the anti-accumulation zone, an anti-tilting screen 6 is provided at the entrance of the anti-accumulation zone, the upper end of the tilted screen 6 is connected to the inner wall of the second screen cylinder portion 103, and the lower end of the tilted screen 6 is connected to the upper end of the partition 5. The material that will fall into the anti-accumulation zone is screened by the tilted screen 6, the catalyst can enter the anti-accumulation zone, and be discharged from the filter cylinder 1 through the screen 104, and the debris screened by the tilted screen 6 slides into the accumulation zone under the guidance of the tilted screen 6 to wait for cleaning, preventing the screened debris from completely covering the screen 104.

[0029] In this embodiment, in order to make all the materials fall on the inclined screen 6, the inclined screen 6 is screened, and an inclined guide plate 4 is provided above the inclined screen 6 to guide the materials to fall to the upper end of the inclined screen 6, and one end of the inclined guide plate 4 is fixedly welded to the second screen cylinder part 103. The inclined guide plate 4 guides the materials falling into the filter cylinder 1 to the upper end of the inclined screen 6 for screening, and the debris left on the inclined screen 6 will slide down to the accumulation area, and will be blocked by the inclined screen 6 to prevent the sieved debris from completely covering the screen 104, thereby avoiding the situation that some catalysts cannot be screened and cause accumulation, reducing the cleaning frequency of the filter cylinder 1, and improving the screening efficiency.

[0030] In this embodiment, the inner angle between the inclined screen 6 and the partition 5 is 125°-150°. The inclination of the inclined screen 6 should not be too large or too small. If the inclination is too small, it is easy to cause the foreign matter passing through the inclined screen 6 to slide unsmoothly. If the inclination is too large, the material will fall into the accumulation area before it can be filtered after falling through the inclined screen 6, which is easy to affect the screening effect.

[0031] A conical dispersing head 2 is arranged on the same axis as the filter cylinder 1. The conical dispersing head 2 is a hollow structure. The small diameter end of the conical dispersing head 2 is located in the first screen cylinder part 101, and the large diameter end of the conical dispersing head 2 is located in the transition screen cylinder part 102. After the material falling from the first screen cylinder part 101 falls on the conical dispersing head 2, it can slide down along the inclined direction of the conical dispersing head 2 and rush down toward the side wall of the transition screen cylinder part 102. In the process of rushing down, part of the material can pass through the sieve holes of the transition screen cylinder part 102, and be screened in advance, thereby reducing the screening pressure of the screen mesh 104 and the inclined screen mesh 6, and improving the screening efficiency.

[0032] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various modifications or variations within the scope of the claims, which does not affect the essence of the present invention.

Claims

1. A debris screening device for a catalyst lifter to be regenerated, comprising a filter cylinder (1) that can be arranged in a main pipeline of the catalyst lifter to be regenerated, the filter cylinder (1) comprising a first sieve cylinder portion (101) and a second sieve cylinder portion (103) arranged in sequence from top to bottom, the diameter of the first sieve cylinder portion (101) being larger than the diameter of the second sieve cylinder portion (103), the first sieve cylinder portion (101) and the second sieve cylinder portion (103) being connected via a transition sieve cylinder portion (102), a sieve net (104) being arranged in a lower end port of the second sieve cylinder portion (103), characterized in that: The screen (104) is provided with a partition (5) for dividing the lower part of the second screen cylinder (103) into an anti-accumulation zone and an accumulation zone. An inclined screen (6) is provided at the entrance of the anti-accumulation zone to prevent debris from entering. The upper end of the inclined screen (6) is connected to the inner wall of the second screen cylinder (103), the lower end of the inclined screen (6) is connected to the upper end of the partition (5), and an inclined material guide plate (4) is provided above the inclined screen (6) to guide materials to fall to the upper end of the inclined screen (6).

2. The debris screening device for a spent catalyst lifter according to claim 1, characterized in that: There is a gap between the transitional screen drum portion (102) and the second screen drum portion (103) and the main pipeline of the lifter.

3. The debris screening device for a spent catalyst lifter according to claim 2, characterized in that: The gap between the transition sieve drum part (102) and the second sieve drum part (103) and the main pipeline of the lifter is 10-20 cm.

4. The debris screening device for a spent catalyst lifter according to claim 1, characterized in that: The filter cylinder (1) is provided with a conical dispersion head (2) on the same axis as the filter cylinder, the small diameter end of the conical dispersion head (2) is located in the first screen cylinder part (101), and the large diameter end of the conical dispersion head (2) is located in the transition screen cylinder part (102).

5. The debris screening device for a spent catalyst lifter according to claim 4, characterized in that: The conical dispersing head (2) is a hollow structure.

6. The debris screening device for a spent catalyst lifter according to claim 1, characterized in that: A support frame (105) is provided at the lower end of the second sieve drum portion (103) and is connected to the main pipeline of the catalyst lifter to be generated.

7. The debris screening device for a spent catalyst lifter according to claim 1, characterized in that: The inner angle between the inclined screen (6) and the partition (5) is 125°-150°.

8. The debris screening device for a spent catalyst lifter according to claim 1, characterized in that: The inclined material guide plate (4) is fixedly welded to the inner wall of the second screen cylinder portion (103).

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