A low-pressure cross-flow filtration system for catalytic slurry

Abstract

The utility model relates to the technical field of filtration, more particularly to a catalytic oil slurry low pressure cross flow filtration system, a catalytic oil slurry low pressure cross flow filtration system, including: high oil tank: high oil tank is connected with raw material oil slurry through pipeline, cross flow filtration equipment: catalytic oil slurry low pressure cross flow filtration system still includes compressed gas storage tank, oil mist processor, dry type deslagging machine, relay pump, residual oil pump, clean oil pump, raw material oil slurry entrance of high oil tank is connected to several cross flow filtration equipment from the self-flow type, the purified oil slurry export is connected with clean oil pump through pipeline, the concentrated oil slurry export is connected with relay pump through pipeline, and relay pump is connected with high oil tank again through pipeline, compressed gas storage tank is connected with backwashing compressed air entrance through pipeline, and gas export is connected with high oil tank through pipeline, oil mist processor is connected with high oil tank through pipeline, high oil tank is connected with dry type deslagging machine through pipeline, and dry type deslagging machine is connected with high oil tank again through residual oil pump and pipeline.

Description

Technical Field

[0001] This utility model relates to the technical field of filtration, and more specifically, to a low-pressure cross-flow filtration system for catalytic oil slurry. Background Technology

[0002] As filtration progresses, solids gradually accumulate on the filter pores, forming a filter cake that clogs the filter media pores and causes a gradual decrease in output. When the output drops to a certain level, a backwashing operation is required to restore the filter media pores to their original state and ensure continued production. The value of the backwashing medium is usually higher than that of the oil slurry.

[0003] To ensure production output and reduce the frequency of backwashing operations, higher filtration pressures and even higher backwashing pressures are typically used. Filtration pressures are usually greater than 0.5 MPa, and backwashing pressures are greater than 0.7 MPa. Since the slurry contains mostly fine particles of extremely hard aluminum and silicon oxides, while stainless steel filter media typically has lower hardness, under pressure, some of these fine particles can severely clog some filter pores, a condition known as clogging. This clogging can persist even after backwashing, leading to a gradual reduction in the effective filtration area and a decrease in production output. Furthermore, the repeated action of filtration and backwashing pressures significantly impacts the lifespan of the filter media. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a low-pressure cross-flow filtration system for catalytic oil slurry, which is simple and quick to operate, and can operate stably and fully automatically.

[0005] The technical solution of this utility model is: a low-pressure cross-flow filtration system for catalytic oil slurry, comprising:

[0006] High-level oil tank: The high-level oil tank is connected to the raw material slurry via a pipeline;

[0007] Cross-flow filtration equipment: There are several cross-flow filtration devices, and the lowest point of the high-level oil tank is higher than the highest point of the several cross-flow filtration devices.

[0008] The cross-flow filtration device includes a tank, a raw material oil slurry inlet connected to the upper part of the tank, and a concentrated oil slurry outlet connected to the lower part of the tank. The tank is provided with a backwash compressed air inlet and a gas outlet. The bottom of the tank is provided with a purified oil slurry outlet. Several filter tubes are detachably connected inside the tank.

[0009] The catalytic slurry low-pressure cross-flow filtration system also includes a compressed gas storage tank, an oil mist processor, several dry slag removers, relay pumps, slag oil pumps, and clean oil pumps.

[0010] The high-level oil tank is connected by gravity to the raw oil slurry inlet of several cross-flow filtration devices; the purified oil slurry outlet is connected to the clean oil pump via a pipeline.

[0011] The concentrated oil slurry outlet is connected to a relay pump via a pipeline, and the relay pump is then connected to a high-level oil tank via a pipeline.

[0012] The compressed gas storage tank is connected to the backwash compressed air inlet via a pipeline, and the gas outlet is connected to the high-level oil tank via a pipeline.

[0013] The oil mist processor is connected to the high-level oil tank via a pipeline;

[0014] The elevated oil tank is connected to several dry slag removers via pipelines, and the dry slag removers are then connected to the elevated oil tank via slag oil pumps and pipelines.

[0015] More preferably, the high-level oil tank is connected to a liquid level regulating valve, which is connected to the raw material slurry through a pipeline.

[0016] Furthermore, the raw material slurry inlets of the aforementioned cross-flow filtration devices are all connected to pneumatic valves, which are connected to the high-level oil tank via pipelines.

[0017] Furthermore, the compressed gas storage tank is connected to several solenoid valves, each of which is connected to the backwash compressed air inlet of each cross-flow filtration device.

[0018] Preferably, a raw material oil slurry guiding cavity is provided between the tank body and the raw material oil slurry inlet and they are interconnected, and a concentrated oil slurry collecting cavity is provided between the tank body and the concentrated oil slurry outlet and they are interconnected.

[0019] Furthermore, the filter element tube includes a tube wall, and the internal space of the tube wall is a filter chamber;

[0020] The space between the walls of several filter tubes and the tank body is the purification oil slurry chamber.

[0021] Specifically, the pipe wall is a sintered stainless steel metal filter screen.

[0022] Compared with the existing technology, the advantages are: the present invention uses cross-flow filtration equipment for low-pressure cross-flow filtration, which has good filtration effect and stable pressure.

[0023] This invention adds a rinsing step with the original solution, which enhances the rinsing effect.

[0024] This invention utilizes low-pressure gas explosion backwashing, resulting in low washing costs.

[0025] This invention can discharge dry slag without the need to treat backwash slurry.

[0026] The filtration system of this invention is simple and quick to operate, and it can operate stably and fully automatically.

[0027] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall system of this utility model.

[0029] Figure 2 This is a schematic diagram of the filtration process of this utility model.

[0030] Figure 3 This is a schematic diagram of the principle of the concentrated oil slurry reflux process of this utility model.

[0031] Figure 4 This is a schematic diagram of the first stage of the original solution rinsing process of this utility model.

[0032] Figure 5 This is a schematic diagram of the second stage of the original solution rinsing process of this utility model.

[0033] Figure 6 This is a schematic diagram illustrating the backwashing process principle of this utility model.

[0034] Figure 7 This is a schematic diagram illustrating the principle of the slag removal process of this utility model.

[0035] Figure 8 This is a schematic diagram of the overall structure of the cross-flow filtration device of this utility model.

[0036] Figure 9 This is a schematic diagram of the filtration and rinsing states of the cross-flow filtration device of this utility model.

[0037] Figure 10 This is a schematic diagram of the cross-sectional cross-flow filtration device of this utility model.

[0038] Figure 11 This is an enlarged schematic diagram of the filter element tube of the cross-flow filtration device of this utility model. Detailed Implementation

[0039] To make the objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0041] In this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. The terms "vertical," "horizontal," "left," "right," "above," "below," and similar expressions are for illustrative purposes only and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0042] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0043] like Figure 1-11 As shown, a low-pressure cross-flow filtration system for catalytic oil slurry includes:

[0044] High-level oil tank 2: High-level oil tank 2 is connected to the raw material slurry through a pipeline;

[0045] Cross-flow filtration device 1: The number of cross-flow filtration devices 1 is several, and the lowest end of the high-level oil tank 2 is higher than the highest end of several cross-flow filtration devices 1.

[0046] The cross-flow filtration device 1 includes a tank 100, a raw material oil slurry inlet 200 connected to the upper part of the tank 100, and a concentrated oil slurry outlet 400 connected to the lower part of the tank 100. The tank 100 is provided with a backwash compressed air inlet 500 and a gas outlet 600. The bottom of the tank 100 is provided with a purified oil slurry outlet 300. Several filter tubes 103 are detachably connected inside the tank 100.

[0047] The catalytic slurry low-pressure cross-flow filtration system also includes a compressed gas storage tank 3, an oil mist processor 4, several dry slag removers 5, a relay pump 6, a slag oil pump 7, and a clean oil pump 8.

[0048] The high-level oil tank 2 is connected by gravity to the raw oil slurry inlet 200 of several cross-flow filtration devices 1; the purified oil slurry outlet 300 is connected to the clean oil pump 8 through a pipeline.

[0049] The concentrated oil slurry outlet 400 is connected to the relay pump 6 via a pipeline, and the relay pump 6 is then connected to the high-level oil tank 2 via a pipeline.

[0050] The compressed gas storage tank 3 is connected to the backwash compressed air inlet 500 via a pipeline, and the gas outlet 600 is connected to the high-level oil tank 2 via a pipeline.

[0051] Oil mist processor 4 is connected to high-level oil tank 2 via a pipe;

[0052] The high-level oil tank 2 is connected to several dry slag removers 5 via pipelines, and the several dry slag removers 5 are then connected to the high-level oil tank 2 via slag oil pump 7 and pipelines.

[0053] In this embodiment, an elevated oil tank 2 is provided. The raw oil slurry flows by gravity to a cross-flow filtration device 1 located at a lower level, maintaining a certain height difference between the two. This height difference provides a stable low-pressure filtration to the cross-flow filtration device 1. The elevated oil tank 2 is approximately 3.5 meters above the ground, and the filtration pressure is approximately 0.03 MPa.

[0054] Specifically, the high-level oil tank 2 is connected to a level regulating valve 9, which is connected to the raw material slurry via a pipeline. The level regulating valve 9 controls the input of the raw material slurry into the high-level oil tank 2.

[0055] Specifically, each of the raw material slurry inlets 200 of several cross-flow filtration devices 1 is connected to a pneumatic valve 10, which is connected to an elevated oil tank 2 via a pipeline. The pneumatic valve 10 controls the gravity flow of the raw material slurry from the elevated oil tank 2 to the several cross-flow filtration devices 1.

[0056] Specifically, the compressed gas storage tank 3 is connected to several solenoid valves 11, and each solenoid valve 11 is connected to the backwash compressed air inlet 500 of each cross-flow filter device 1. The solenoid valves 11 control the input of gas from the compressed gas storage tank 3 into the cross-flow filter device 1.

[0057] like Figure 8-11As shown, the core component of this utility model is a cross-flow filtration device. The device includes a tank 100, a raw material oil slurry guiding chamber 800 located at the top of the tank 100 and communicating with the tank 100, and a concentrated oil slurry collecting chamber 900 located at the bottom of the tank 100 and communicating with the tank 100. The raw material oil slurry guiding chamber 800 and the concentrated oil slurry collecting chamber 900 are detachably connected to the tank 100.

[0058] The raw material oil slurry guiding chamber 800 is connected to the top of the raw material oil slurry inlet 200, and the concentrated oil slurry collecting chamber 900 is connected to the bottom of the concentrated oil slurry outlet 400; the tank body 100 is provided with a backwash compressed air inlet 500 and a gas outlet 600 on one side, and a purified oil slurry outlet 300 at the bottom of the other side of the tank body 100.

[0059] Several filter tubes 103 are detachably connected inside the tank body 100.

[0060] In this invention, the tank 100 is the main structure of the equipment. The raw material slurry guiding chamber 800 serves to concentrate and guide the raw material slurry, effectively preventing blockage at the raw material slurry inlet 200 and ensuring that the raw material slurry flows evenly to each filter element tube 103. Similarly, the concentrated slurry collecting chamber 900 collects the concentrated slurry output from each filter element tube 103 before discharging it through the concentrated slurry outlet 400.

[0061] The backwash compressed air inlet 500 can input backwash compressed air to flush several filter tubes 103, and the gas outlet 600 is used to discharge gas. In this invention, the gas outlet 600 is located above the backwash compressed air inlet 500.

[0062] The filter element tube 103 is the core component of this equipment, and several filter element tubes 103 are evenly distributed vertically along the tank body 100. The filter element tube 103 is a cross-flow filtration filter element tube. The raw material oil slurry flows along the filter element tube 103 at a certain speed. During this process, a portion of the raw material oil slurry permeates through the filter element tube 103 by pressure difference and becomes purified oil slurry. The purified oil slurry is discharged from the purified oil slurry outlet 300 into the tank body 100. The flow direction of the raw material oil slurry is 90° with the flow direction of the purified oil slurry. The unfiltered raw material oil slurry continues to flow along the filter element tube 103 and becomes concentrated oil slurry.

[0063] In this embodiment, the raw material slurry guiding chamber 800 and the concentrated slurry collecting chamber 900 are detachably connected to the tank body 100, and several filter tubes 103 are detachably connected inside the tank body 100. That is, the upper and lower parts of the tank body 100 are detachable, and the filter tubes 103 are also detachable. This design facilitates the replacement of the filter tubes 103, eliminating the need for cumbersome procedures and greatly simplifying the operation process.

[0064] On the other hand, depending on the actual condition of the raw material slurry, filter tubes 103 with different filtration precisions can be tested and adjusted to select the filter tube 103 that best suits the actual condition of the raw material slurry. This equipment has a wide range of applications and can meet the needs of different filtration precisions.

[0065] Furthermore, a first perforated plate 101 is fixedly provided on the top of the tank body 100, and the first perforated plate 101 is located between the raw material oil slurry guiding cavity 800 and the tank body 100.

[0066] A second perforated plate 102 is fixedly provided at the bottom of the tank body 100. The second perforated plate 102 is located between the concentrated oil slurry collection chamber 900 and the tank body 100.

[0067] Several filter tubes 103 are inserted and positioned within the first porous plate 101 and the second porous plate 102.

[0068] In this embodiment, the structure of the first porous plate 101 and the second porous plate 102, along with the insertion and positioning of several filter tubes 103, is simple and quick, and can quickly achieve the positioning and coordination of several filter tubes 103 with the tank body 100.

[0069] Specifically, the first perforated plate 101 and the second perforated plate 102 are symmetrically arranged along the center of the tank 100. In this embodiment, the opening position, opening shape, and opening size of the first perforated plate 101 and the second perforated plate 102 are consistent, ensuring that the filter tube 103 is vertically distributed inside the tank 100.

[0070] Preferably, in this embodiment, such as Figure 8-10 As shown, the first porous plate 101 and the second porous plate 102 have 18 openings, which are evenly distributed. Figure 10 The distribution of the 18 openings is shown. Additionally, it should be noted that, for better observation of the vertical details inside the tank 100, Figure 8-9 Only two filter cartridges, 103, are shown.

[0071] Furthermore, filter element tube mounting portions 104 are provided within the holes of both the first porous plate 101 and the second porous plate 102, and the filter element tube mounting portions 104 are fixed to both ends of the filter element tube 103. In this embodiment, the filter element tube mounting portions 104 serve to position and support the filter element tube 103. The filter element tube mounting portions 104 are installed at both ends of the tank body 100 via the first porous plate 101 and the second porous plate 102, respectively, enabling rapid installation and positioning of the filter element tube 103.

[0072] Additionally, it should be noted that this equipment is also equipped with plugs for sealing the holes of the first perforated plate 101 and the second perforated plate 102. In actual filtration, to cope with different production capacity conditions, it is not always necessary for the holes of the first perforated plate 101 and the second perforated plate 102 to be fully filled with filter cartridges 103. Therefore, plugs are provided to seal the unused holes and prevent leakage of the raw material slurry.

[0073] Further preferred, such as Figure 8-11 As shown, a represents raw oil slurry, b represents purified oil slurry, c represents concentrated oil slurry, d represents backwash compressed air, e represents exhaust air, and f represents filter cake.

[0074] The filter element tube 103 includes a tube wall 103a, and the internal space of the tube wall 103a is a filter chamber 105;

[0075] The space between the pipe wall 103a of several filter tubes 103 and the tank body 100 is the purification oil slurry chamber 106.

[0076] In this embodiment, the internal space of the pipe wall 103a is a filter chamber 105, and the two ends of the filter chamber 105 are respectively connected to the raw material slurry guiding chamber 800 and the concentrated slurry collecting chamber 900. The space between the pipe wall 103a of the several filter element tubes 103 and the tank body 100 is a purified slurry chamber 106, which is connected to the purified slurry outlet 300. With the above structure, the raw material slurry a can only flow in the filter chamber 105 of each filter element tube 103, while the purified slurry b can only flow in the purified slurry chamber 106.

[0077] During filtration, the raw oil slurry a flows along the filter element tube 103 at a certain speed. During this process, a portion of the raw oil slurry a permeates the filter element tube 103 due to pressure difference, becoming purified oil slurry b. Purified oil slurry b is discharged from the purified oil slurry outlet 300 into the tank 100. The flow direction of the raw oil slurry a is at 90° to the flow direction of the purified oil slurry b. The unfiltered raw oil slurry a continues to flow along the filter element tube 103, becoming concentrated oil slurry c. Concentrated oil slurry c first collects in the concentrated oil slurry collection chamber 900, and then is discharged through the concentrated oil slurry outlet 400. In the above filtration process, as filtration proceeds, solids gradually accumulate inside the tube wall 103a, forming filter cake f, which clogs the filter pores, leading to a gradual decrease in output.

[0078] Specifically, the pipe wall 103a is a sintered stainless steel metal filter screen. Filter holes are formed on the sintered stainless steel metal filter screen, which can have filtration precisions of 2μm, 5μm, 7μm, 10μm, etc. Based on the actual conditions of the raw material oil slurry, filter tubes with different filtration precisions are tested to select the most suitable filter tube.

[0079] Furthermore, the top of the raw material oil slurry guiding cavity 800 is also provided with a raw material oil slurry inlet mounting cover 109, and the raw material oil slurry inlet 200 is fixed on the raw material oil slurry inlet mounting cover 109, and the raw material oil slurry inlet 200 is connected to the raw material oil slurry guiding cavity 800;

[0080] A first flange 111 is provided at the edge between the raw material oil slurry inlet mounting cover 109 and the raw material oil slurry guide cavity 800, and the two components are fixed by the first flange 111.

[0081] In this embodiment, the above-described structure allows for quick installation and disassembly of the raw material slurry inlet cover 109 and the raw material slurry guide cavity 800.

[0082] Specifically, an overflow pipe 700 is also provided at the raw material slurry inlet cover 109, which is connected to the raw material slurry guide cavity 800. This arrangement allows for observation of the liquid volume in the tank 100 and the raw material slurry guide cavity 800.

[0083] Furthermore, a second flange 112 is provided at the edge between the raw material oil slurry guide cavity 800 and the tank body 100, and the two components are fixed by the second flange 112;

[0084] A third flange 113 is provided at the edge between the tank body 100 and the concentrated oil slurry collection chamber 900, and the two components are fixed by the third flange 113.

[0085] The raw material slurry guiding chamber 800 and the tank body 100 can be quickly installed and disassembled via the second flange 112. The tank body 100 and the concentrated slurry collecting chamber 900 can be quickly installed and disassembled via the third flange 113.

[0086] Therefore, the upper and lower parts of the tank 100 are detachable, and the several filter tubes 103 are also detachable. This design facilitates the replacement of the filter tubes 103, eliminating the need for complicated operating procedures and greatly simplifying the operation process.

[0087] Furthermore, a bracket 107 is provided on the side of the tank body 100, and a lifting ring 108 is provided on the top of the raw material slurry inlet mounting cover 109. The bracket 107 and the lifting ring 108 facilitate the installation of the tank body 100 in different situations.

[0088] like Figure 1-11 As shown in the diagram, a represents the raw oil slurry, b represents the purified oil slurry, c represents the concentrated oil slurry, d represents the backwash compressed air, e represents the exhaust air, f represents the filter cake, g represents the dry residue, and h represents the oil slurry after residue removal. Additionally, it should be noted that to better represent the operating status of a particular process, [the diagram is incomplete]. Figure 2-7 The process is highlighted with red lines, but this does not mean that the processes outside the red lines have stopped.

[0089] The principle of the catalytic slurry low-pressure cross-flow filtration system of this invention is as follows, which includes the following steps:

[0090] Preparation steps: such as Figure 2 As shown in Figure 9, the raw material oil slurry a is transported to the high-level oil tank 2 through the pipeline and the liquid level regulating valve 9. After entering the high-level oil tank 2, the raw material oil slurry flows by gravity to several cross-flow filtration devices 1 through the pneumatic valve 10.

[0091] Filtration process: such as Figure 2 As shown in Figure 9, the raw material oil slurry a flows along the filter tube 103 at a certain speed. During this process, a portion of the raw material oil slurry a permeates the filter tube 103 by pressure difference and becomes purified oil slurry b. The purified oil slurry b is discharged from the purified oil slurry outlet 300 into the tank 100, and then output through the clean oil pump 8.

[0092] Concentrated oil slurry reflux process: such as Figure 3 As shown in 9, during the filtration process, the unfiltered raw material slurry a continues to flow along the filter tube 103 to become concentrated slurry c. The concentrated slurry c is discharged from the tank 100 through the concentrated slurry outlet 400, and then flows back to the high-level oil tank 2 through the relay pump 6.

[0093] Because it is low-pressure filtration, the solids adhere to the surface of the filter media, forming a loose filter cake f, which does not clog the filter pores. Due to cross-flow filtration, some of the solid filter cake f is returned to the high-level oil tank 2 via the relay pump 6 along with the concentrated slurry c, slowing down the rate of production decline. Therefore, after the filtration and concentrated slurry return processes have been running for one hour, the production rate drops to 70%, at which point the raw material rinsing process is restarted.

[0094] Raw solution rinsing procedure: Close the pneumatic valve for approximately x seconds, while keeping relay pump 6 on. Figure 4 The blue line represents the raw material rinsing process. The blue pneumatic valve 10 is closed, while the other pneumatic valves 10 remain open. The concentrated oil slurry c accumulates in the concentrated oil slurry collecting chamber 900 and is then emptied by the relay pump 6. At this time, the first cross-flow filter 1 (blue line) is empty, containing no liquid. The pneumatic valve 10 is then reopened, and the raw material oil slurry a enters the cross-flow filter 1, completing one raw material rinsing process. Here, x seconds represents 20 seconds.

[0095] Next, as Figure 5 As shown, the blue line represents the raw solution rinsing process. The second cross-flow filtration device 1 (highlighted by the blue line) can repeat the above process to complete the raw solution rinsing process of the second cross-flow filtration device 1. The remaining raw solution rinsing processes of the cross-flow filtration device 1 are the same as those described above.

[0096] It should be noted that in the raw liquid rinsing process, the volume of the concentrated oil slurry collection chamber 900 is larger than the internal volume of the 18 filter element tubes 103. This arrangement ensures that approximately 20 seconds after the pneumatic valve 10 is closed, the concentrated oil slurry c accumulates in the concentrated oil slurry collection chamber 900, leaving the 18 filter element tubes 103 in an empty state. When the pneumatic valve 10 is reopened, the raw material oil slurry a re-enters the cross-flow filtration device 1. The raw material oil slurry a flows along the filter element tubes 103 at a certain speed, washing away the filter cake f. Therefore, this process is called the raw liquid rinsing process.

[0097] This invention adds a raw liquid rinsing process, which enhances the rinsing effect. The reason for the excellent rinsing effect is that, due to low-pressure filtration, the filter cake f is formed in a loose and attached state. This raw liquid rinsing process is similar to flushing a toilet or washing away stains. It utilizes the instantaneous force of the raw material slurry a when the pneumatic valve 10 is reopened to wash away the filter cake f.

[0098] The undiluted solution rinsing process is combined with low-pressure gas explosion backwashing (low rinsing cost). The combination of these two rinsing methods greatly enhances the rinsing effect, stabilizes the system's output, and extends the service life of the filter media.

[0099] After the original solution rinsing process is repeated 10 times, the output drops to 80%, and then the backwashing process is restarted.

[0100] Backwashing process: such as Figure 6 As shown in Figure 9, the filtration and concentrated slurry return processes operate normally. Solenoid valve 11 is opened for approximately y seconds (y seconds is 3 seconds). Backwash compressed air d enters the cross-flow filter 1 from the backwash compressed air inlet 500. The backwash compressed air d is approximately 0.08 MPa. Upon opening solenoid valve 11, the backwash compressed air d suddenly depressurizes, causing the gas to expand suddenly and create an explosive effect, instantly completing the explosive backwashing action on the cross-flow filter 1. Solenoid valve 11 is then closed, and the discharged air e flows back to the high-level oil tank 2 from the gas outlet 600. The oil mist processor 4 performs environmentally friendly treatment on the oil mist in the high-level oil tank 2, completing the backwashing process. No other operations are required, and production can be restored to 100%. The backwashing process is extremely simple to operate, takes very little time, has a perfect backwashing effect, and has low washing costs. After treatment by the oil mist processor 4, the treated gas meets environmental standards before being discharged.

[0101] Additionally, it should be noted that the oil mist processor 4 is always running throughout the filtration process. Even without backwashing, the oil slurry in the high-level oil tank 2 within the system is at a high temperature, which will generate oil mist that needs to be treated.

[0102] Slag removal process: such as Figure 7As shown in Figure 9, the concentrated oil slurry c flows by gravity from the bottom of the high-level oil tank 2 to the slag remover 5. After being processed by the slag remover 5, the dry slag g is discharged, and the slurry h after slag removal is returned to the high-level oil tank 2 via the slag-oil pump 7. The specific structure of the slag remover 5 can adopt the solid-liquid separation equipment previously applied for by the utility model applicant.

[0103] This utility model is compared with the applicant's prior application 202311417261.9, which describes a solid-liquid separation system and method, as well as a traditional high-pressure positive flow filtration process. The operation was compared using filter media with exactly the same specifications and parameters. The operation data is recorded in the table below. The data shows that this utility model has obvious advantages in practical applications.

[0104] As shown in the table below

[0105] Option A: The process of this utility model. Option B: 202311417261.9 A solid-liquid separation system and method. Option C: High-pressure positive flow filtration process.

[0106]

[0107]

[0108] As can be seen from the actual operation in the table above, this invention has a significant advantage in terms of output. The filtration system of this invention is simple and quick to operate, and it can operate stably and fully automatically. The various processes of this invention work closely together, ensuring high efficiency and stability. The entire system operates at low pressure, resulting in stable output and extending the service life of the filter media, thereby reducing costs.

[0109] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A low-pressure cross-flow filtration system for catalytic oil slurry, characterized in that, include: High-level oil tank (2): The high-level oil tank (2) is connected to the raw material slurry through a pipeline; Cross-flow filtration device (1): The number of cross-flow filtration devices (1) is several, and the lowest end of the high-level oil tank (2) is higher than the highest end of several cross-flow filtration devices (1); The cross-flow filtration device (1) includes a tank (100), a raw material oil slurry inlet (200) connected to the upper part of the tank (100), and a concentrated oil slurry outlet (400) connected to the lower part of the tank (100). The tank (100) is provided with a backwash compressed air inlet (500) and a gas outlet (600). The bottom of the tank (100) is provided with a purified oil slurry outlet (300). Several filter tubes (103) are detachably connected inside the tank (100). The catalytic slurry low-pressure cross-flow filtration system also includes a compressed gas storage tank (3), an oil mist processor (4), several dry slag removers (5), a relay pump (6), a slag oil pump (7), and a clean oil pump (8); The high-level oil tank (2) is connected by gravity to the raw material oil slurry inlet (200) of several cross-flow filtration devices (1); the purified oil slurry outlet (300) is connected to the purified oil pump (8) through a pipeline; The concentrated oil slurry outlet (400) is connected to the relay pump (6) via a pipeline, and the relay pump (6) is then connected to the high-level oil tank (2) via a pipeline. The compressed gas storage tank (3) is connected to the backwash compressed air inlet (500) via a pipeline, and the gas outlet (600) is connected to the high-level oil tank (2) via a pipeline; The oil mist processor (4) is connected to the high-level oil tank (2) via a pipe; The high-level oil tank (2) is connected to several dry slag removers (5) through pipelines, and the several dry slag removers (5) are then connected to the high-level oil tank (2) through slag oil pumps (7) and pipelines.

2. The catalytic slurry low-pressure cross-flow filtration system according to claim 1, characterized in that: The high-level oil tank (2) is connected to a liquid level regulating valve (9), which is connected to the raw material oil slurry through a pipeline.

3. The catalytic slurry low-pressure cross-flow filtration system according to claim 2, characterized in that: The raw material slurry inlet (200) of each of the aforementioned cross-flow filtration devices (1) is connected to a pneumatic valve (10), and the pneumatic valve (10) is connected to the high-level oil tank (2) through a pipeline.

4. The catalytic slurry low-pressure cross-flow filtration system according to claim 3, characterized in that: The compressed gas storage tank (3) is connected to several solenoid valves (11), and each solenoid valve (11) is connected to the backwash compressed air inlet (500) of each cross-flow filtration device (1).

5. The catalytic slurry low-pressure cross-flow filtration system according to claim 4, characterized in that: The tank (100) and the raw material slurry inlet (200) are provided with a raw material slurry guide cavity (800) and are interconnected. The tank (100) and the concentrated slurry outlet (400) are provided with a concentrated slurry collection cavity (900) and are interconnected.

6. The catalytic slurry low-pressure cross-flow filtration system according to claim 1, characterized in that: The filter tube (103) includes a tube wall (103a), and the internal space of the tube wall (103a) is a filter chamber (105); The space between the pipe wall (103a) of several filter tubes (103) and the tank body (100) is the purification oil slurry chamber (106).

7. The catalytic slurry low-pressure cross-flow filtration system according to claim 6, characterized in that: The tube wall (103a) is a stainless steel sintered metal filter screen.

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