Catalytic cracking slurry oil filtering and recycling system

Abstract

The utility model discloses a catalytic cracking slurry oil filtering and recycling system, which belongs to the technical field of catalytic cracking and comprises a raw material heating tank, a cleaning liquid tank and a filtering tank, a rotating shaft and a separation assembly are arranged in the filtering tank; the separation assembly comprises a sleeve and a separation plate; a driving mechanism is arranged at the upper end of the rotating shaft; a blocking plate is arranged below the filter screen, and an adhesion mechanism is arranged in the cleaning area. After filter residues are accumulated on the filter screen, the filter screen in the working area can be rotated to the cleaning area through rotation of the rotating shaft, cleaning liquid is released into the cleaning area to soak the filter screen, the difficulty in removing the filter residues is reduced, and the filter residues are adhered through the adhesion mechanism, so that the system can be cleaned while filtering without stopping running; the filtering efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of catalytic cracking technology, specifically to a catalytic cracking slurry filtration and recovery system. Background Technology

[0002] Catalytic cracking is one of the most effective technologies for converting heavy oil into high-value-added products such as gasoline, diesel, and petroleum gas. In actual industrial production, the conversion rate of heavy oil is 80-90%, meaning that 10-12% of heavy oil remains unconverted, commonly known as catalytic slurry. With the development of heavy oil hydrotreating technology, the slurry can be hydrotreated before entering the catalytic cracking unit, which can improve the yield of gasoline and diesel.

[0003] However, catalytic slurry typically contains a large amount of highly acidic catalyst powder. If this powder enters the heavy oil hydrotreating reactor along with the catalytic slurry, it will cause serious problems such as carbon buildup on the surface of the hydrotreating catalyst and increased bed pressure drop, preventing the unit from operating normally. Therefore, the slurry needs to be filtered to remove the catalyst powder. However, after a period of use, existing slurry filtration equipment will accumulate residues, forming filter cake. This requires shutdown for manual cleaning, resulting in a decrease in slurry filtration efficiency. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a catalytic cracking slurry filtration and recovery system.

[0005] The technical solution of this utility model is: a catalytic cracking slurry filtration and recovery system, including a feed heating tank, a cleaning liquid tank, and a filter tank; the filter tank is vertically provided with a rotating shaft and a partition component for dividing the filter tank into a cleaning zone and a working zone, the cleaning zone being connected to the cleaning liquid tank and the working zone being connected to the feed heating tank; the partition component includes a sleeve rotatably mounted on the rotating shaft and partition plates respectively provided on both sides of the sleeve, both partition plates being fixedly connected to the filter tank; a filter screen is mounted on the rotating shaft located below the partition component, the upper end of the rotating shaft passing through the top surface of the filter tank and being provided with a driving mechanism; a sealing plate for sealing the filter screen is provided below the filter screen located in the cleaning zone, an adhesion mechanism for adhering filter residue on the filter screen is provided in the cleaning zone, and a drain port is provided on the side wall of the cleaning zone.

[0006] Explanation: The above system heats the oil slurry through a raw material heating tank and filters the oil slurry through the working area of ​​the filter tank. When filter residue accumulates on the filter screen, the rotating shaft can be controlled to rise so that the spline and spline groove are connected. The rotating shaft rotates the filter screen in the working area to the cleaning area. The filter screen is soaked by releasing cleaning liquid into the cleaning area, which reduces the difficulty of removing filter residue. Then, the filter residue is adhered by an adhesion mechanism. This allows the system to clean while filtering without stopping operation, thus improving filtration efficiency.

[0007] Furthermore, the lower end of the filter canister is funnel-shaped.

[0008] Note: The funnel shape can increase the discharge speed of the oil slurry, making it easier to discharge the oil slurry and preventing the oil slurry from accumulating in the filter tank.

[0009] Furthermore, the filter screen is rotatably connected to the inner wall of the filter tank, the lower end of the rotating shaft passes through the filter screen and is provided with a spline, and the bottom surface of the filter screen is provided with a spline groove that connects with the spline by the upward movement of the rotating shaft, and a rotating ring is fixedly sleeved on the rotating shaft; the sealing plate is provided with an air blowing port corresponding to the filter holes of the filter screen, the side wall of the rotating ring is provided with multiple protrusions, and the upper end of the partition plate is fixedly provided with an airbag that supplies air to the air blowing port by the pressure of the protrusions.

[0010] Instructions: After the cleaning fluid is drained, the spindle can be moved downwards to separate the spline from the spline groove. Then, the spindle drives the rotating ring to rotate, causing the protruding column to intermittently squeeze the air bladder, which in turn blows the filter residue in the filter holes upwards through the air outlet, preventing the filter holes from becoming clogged and improving the cleaning effect.

[0011] Furthermore, the adhesion mechanism includes a lifting plate arranged laterally in the cleaning area, and a lifting assembly for driving the lifting plate to move up and down, wherein the bottom surface of the lifting plate is provided with cleaning soft rubber.

[0012] Note: After the cleaning fluid is drained, the lifting plate can be lowered by controlling the lifting assembly to allow the cleaning soft rubber to come into contact with the filter screen and adhere to the filter residue, preventing the filter residue from remaining in the cleaning area.

[0013] Furthermore, the adhesion mechanism includes two mounting plates respectively set on both sides of the cleaning area, three rollers arranged horizontally and parallel between the two mounting plates, and a transmission belt sleeved on the three rollers; both ends of the three rollers pass through the mounting plates, and the cleaning area is provided with a lifting assembly for driving the mounting plates to move up and down, and the transmission belt is provided with cleaning soft rubber.

[0014] Note: After the cleaning fluid is discharged, the mounting plate can be lowered by controlling the lifting component, so that the cleaning soft rubber on one side of the transmission belt adheres to the filter residue. When the adhesion ability of the cleaning soft rubber on one side of the transmission belt decreases, the other side of the transmission belt can be aligned with the filter screen by rotating the roller shaft, which increases the amount of filter residue adhered by the adhesion mechanism and avoids frequent manual cleaning of the adhesion mechanism.

[0015] The beneficial effects of this utility model are:

[0016] (1) When filter residue accumulates on the filter screen, the filter screen in the working area can be rotated to the cleaning area by rotating the shaft. The filter screen is soaked by releasing cleaning liquid into the cleaning area, which reduces the difficulty of removing the filter residue. Then, the filter residue is adhered by the adhesion mechanism, so that the system can be cleaned while filtering without stopping the operation, which improves the filtration efficiency.

[0017] (2) After the cleaning liquid is discharged, the present invention can drive the rotating ring to rotate through the rotating shaft, so that the convex column intermittently squeezes the air bag, and blows the filter residue in the filter hole upward through the air blowing port, so as to avoid the filter hole blockage and improve the cleaning effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the filter tank in Embodiment 1 of this utility model;

[0020] Figure 3 This is a schematic diagram of the filter structure in Embodiment 1 of this utility model;

[0021] Figure 4 This is a longitudinal sectional view of the filter tank in Embodiment 2 of this utility model;

[0022] Figure 5 This is a schematic diagram of the filter structure in Embodiment 2 of this utility model;

[0023] Figure 6 This is a longitudinal sectional view of the filter screen in Embodiment 2 of this utility model;

[0024] Figure 7 This is a schematic diagram of the overall structure of Embodiment 3 of this utility model;

[0025] Figure 8 This is a schematic diagram of the adhesion mechanism structure in Embodiment 3 of this utility model;

[0026] Among them, 1-heating tank, 2-cleaning fluid tank, 3-filter tank, 31-rotating shaft, 311-first gear, 312-lifting ring, 313-electric telescopic rod, 32-filter screen, 33-sleeve, 34-partition plate, 341-tapping column, 342-airbag, 35-rotating ring, 351-protruding column, 36-sealing plate, 37-drain port, 38-second motor, 381-second gear, 4-adhesion mechanism, 41-lifting plate, 42-roller shaft, 43-transmission belt, 44-mounting plate, 45-slide bar, 46-third motor, 47-second hydraulic rod. Detailed Implementation

[0027] The present invention will now be described in more detail with reference to specific embodiments, so as to better demonstrate the advantages of the present invention.

[0028] Example 1: As Figure 1 , Figure 2The catalytic cracking slurry filtration and recovery system shown includes a feedstock heating tank 1, a cleaning fluid tank 2, and a filter tank 3. The feedstock heating tank 1 has heating elements on its side wall. The filter tank 3 has a vertically mounted rotating shaft 31 and a partition assembly for dividing the filter tank 3 into a cleaning zone and a working zone. The cleaning zone is connected to the cleaning fluid tank 2 via a pipe, and the working zone is connected to the feedstock heating tank 1 via a pipe. Figure 3 As shown, the separating assembly includes a sleeve 33 rotatably mounted on a rotating shaft 31, and separating plates 34 respectively disposed on the left and right sides of the sleeve 33; both separating plates 34 are fixedly connected to the filter tank 3.

[0029] like Figure 4 As shown, a filter screen 32 is fixedly sleeved on the rotating shaft 31 located below the separator assembly. The upper end of the rotating shaft 31 passes through the top surface of the filter tank 3 and is provided with a drive mechanism. The drive mechanism is a first motor located on the top surface of the filter tank 3. The first motor is a commercially available product. A sealing plate 36 for sealing the filter screen 32 is provided below the filter screen 32 in the cleaning area. An adhesion mechanism 4 for adhering the filter residue on the filter screen 32 is provided in the cleaning area, and a drain port 37 is provided on the side wall of the cleaning area.

[0030] The adhesion mechanism 4 includes a lifting plate 41 horizontally arranged in the cleaning area, and a lifting assembly for driving the lifting plate to move up and down. The lifting assembly is a first hydraulic rod arranged on the top surface of the filter tank 3. The first hydraulic rod is a commercially available product. The bottom surface of the lifting plate is provided with cleaning soft rubber, which is also a commercially available product. The lower end of the filter tank 3 is funnel-shaped, and the bottom surface of the filter tank 3 is provided with a discharge port.

[0031] The working principle of the above system is as follows: oil slurry is added to the raw material heating tank 1 and heated to keep the oil slurry fluid. The oil slurry flows into the working area of ​​the filter tank 3 through the pipeline and is filtered through the filter screen 32. After a period of use, the first motor 38 drives the rotating shaft 31 to rotate, so that the filter screen 32 in the working area rotates to the cleaning area. The cleaning liquid is released into the cleaning area through the cleaning liquid tank 2. The stickiness of the filter residue is weakened under the soaking of the filter screen 32 in the cleaning liquid. After soaking, the cleaning liquid is discharged through the drain port 37. Then, the lifting plate 41 is driven to descend by the hydraulic rod, so that the cleaning soft rubber on the lifting plate 41 comes into contact with the filter screen 32 and adheres to the filter residue, thereby cleaning the filter screen 32 in the cleaning area. The cleaning liquid in this embodiment is an alkaline solution.

[0032] Example 2: Figure 5 , Figure 6As shown, this embodiment is basically the same as embodiment 1, except that the driving mechanism includes a second motor 38 disposed on the top surface of the filter tank 3, a first gear 311 fixedly sleeved on the rotating shaft 31, and a lifting ring 312 rotatably sleeved on the rotating shaft 31; the second motor 38 is a commercially available product, the lifting ring 312 is rotatably connected to the annular groove provided on the rotating shaft 31, the output shaft of the second motor 38 is sleeved with a second gear 381 for meshing with the first gear 311, and the top surface of the filter tank 3 is provided with an electric telescopic rod 313 for driving the lifting ring 312, the electric telescopic rod is a commercially available product;

[0033] The filter screen 32 is rotatably connected to the inner wall of the filter tank 3. The lower end of the rotating shaft 31 passes through the filter screen 32 and is provided with a spline. The bottom surface of the filter screen 32 is provided with a spline groove that connects with the spline when the rotating shaft 31 rises. A rotating ring 35 is fixedly sleeved on the rotating shaft 31.

[0034] The sealing plate 36 has an air blowing port corresponding to the filter holes of the filter screen 32. The rotating ring 35 has eight protrusions 351 on its side wall. The upper end of the partition plate 34 is fixed with an airbag 342 that is supplied to the air blowing port by the protrusions 351. The air blowing port is connected to the gas channel in the sealing plate 36. The airbag 342 is connected to the gas channel through a pipe. Both the gas channel and the air inlet of the airbag 342 are equipped with one-way valves. The one-way valve of the gas channel is connected in one direction from the gas channel to the air blowing port. The one-way valve of the air inlet of the airbag 342 is connected in one direction from the outside to the airbag.

[0035] The working principle of the airbag 342 is as follows: After the lifting plate 41 descends and contacts the filter screen 32, the electric telescopic rod 313 can be shortened by controlling it to lower the rotating shaft 31. At this time, the spline and spline groove are disconnected, and the rotating shaft 31 no longer drives the filter screen 32 to rotate. Then, the second motor 38 can drive the rotating shaft 31 to rotate, so that the protrusion 351 intermittently squeezes the airbag 342. The gas in the airbag 342 can be released through the air blowing port, so that the gas blows the filter residue in the filter hole upward, so that the filter residue in the filter hole can adhere to the lifting plate 41.

[0036] Example 3: As Figure 7 , 8 As shown, this embodiment is basically the same as embodiment 1, except that the adhesion mechanism 4 includes two mounting plates 44 respectively set on both sides of the cleaning area, three rollers 42 arranged horizontally and parallel between the two mounting plates 44, and a transmission belt 43 sleeved on the three rollers 42; the left and right ends of the three rollers 42 pass through the mounting plates 44, and the cleaning area is provided with a lifting assembly for driving the mounting plates 44 to rise and fall, and the transmission belt 43 is provided with cleaning soft rubber;

[0037] The lifting assembly includes a slide bar 45 slidably disposed on the side wall of the filter tank 3, and a second hydraulic rod 47 fixedly disposed on the side wall of the filter tank 3 for driving the slide bar 45 to slide up and down. The second hydraulic rod 47 is a commercially available product. The left and right ends of the roller shaft 42 located at the highest point pass through the slide groove and the slide bar 45 provided on the side wall of the filter tank 3 in sequence, and a third motor 46 is provided at the front end of the roller shaft 42. The third motor 46 is a commercially available product.

[0038] The working principle of the aforementioned striking column 341 is as follows: When adhesion is required, the slide bar 45 is lowered by controlling the second hydraulic rod 47. The slide bar 45 will drive the three rollers 42 and the transmission belt 43 to descend as a whole, so that one side of the transmission belt 43 contacts the filter screen 32 for adhesion. After adhesion for a period of time, the rollers 42 can be rotated by the third motor 46, so that the transmission belt 43 moves to align the other side with the filter screen 32.

Claims

1. A catalytic cracking slurry filtration and recovery system, characterized in that, The system includes a raw material heating tank (1), a cleaning liquid tank (2), and a filter tank (3). The filter tank (3) is vertically equipped with a rotating shaft (31) and a partition assembly for dividing the filter tank (3) into a cleaning area and a working area. The cleaning area is connected to the cleaning liquid tank (2), and the working area is connected to the raw material heating tank (1). The partition assembly includes a sleeve (33) rotatably mounted on the rotating shaft (31) and partition plates (34) respectively set on both sides of the sleeve (33). Both partition plates (34) are fixedly connected to the filter tank (3). A filter screen (32) is mounted on the rotating shaft (31) located below the partition assembly. The upper end of the rotating shaft (31) passes through the top surface of the filter tank (3) and is equipped with a driving mechanism. A sealing plate (36) for sealing the filter screen (32) is provided below the filter screen (32) in the cleaning area. An adhesion mechanism (4) for adhering the filter residue on the filter screen (32) is provided in the cleaning area, and a drain port (37) is provided on the side wall of the cleaning area.

2. The catalytic cracking slurry filtration and recovery system according to claim 1, characterized in that, The lower end of the filter tank (3) is funnel-shaped.

3. The catalytic cracking slurry filtration and recovery system according to claim 1, characterized in that, The filter screen (32) is rotatably connected to the inner wall of the filter tank (3). The lower end of the rotating shaft (31) passes through the filter screen (32) and is provided with a spline. The bottom surface of the filter screen (32) is provided with a spline groove that is connected to the spline by the rotating shaft (31) rising. A rotating ring (35) is fixedly sleeved on the rotating shaft (31). The sealing plate (36) is provided with an air blowing port corresponding to the filter holes of the filter screen (32). The rotating ring (35) is provided with multiple protrusions (351) on its side wall. An air bag (342) is fixedly provided at the upper end of the partition plate (34) by the protrusions (351) to supply air to the air blowing port.

4. The catalytic cracking slurry filtration and recovery system according to claim 1, characterized in that, The adhesion mechanism (4) includes a lifting plate (41) arranged laterally in the cleaning area, and a lifting assembly for driving the lifting plate to move up and down. The bottom surface of the lifting plate is provided with cleaning soft rubber.

5. The catalytic cracking slurry filtration and recovery system according to claim 1, characterized in that, The adhesion mechanism (4) includes two mounting plates (44) respectively set on both sides of the cleaning area, three rollers (42) arranged horizontally and parallel between the two mounting plates (44), and a transmission belt (43) sleeved on the three rollers (42); both ends of the three rollers (42) pass through the mounting plates (44), and the cleaning area is provided with a lifting assembly for driving the mounting plates (44) to rise and fall, and the transmission belt (43) is provided with cleaning soft rubber.

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