Catalytic slurry oil solid removal system for improving yield of clarified slurry oil

Abstract

The utility model provides a catalytic slurry oil solid removal system for improving the yield of clarified slurry oil, which comprises a primary solid removal device and a secondary solid removal device which are connected with each other, the primary solid removal device comprises a primary concentrated slurry oil discharge pipeline, and the secondary solid removal device comprises a secondary circulating pipeline, a secondary circulating pump and a secondary membrane separator group. The first-stage concentrated slurry oil discharge pipeline is continuously introduced into a second-stage circulating pipeline, the second-stage circulating pipeline is connected with a second-stage circulating pump, and the second-stage circulating pipeline and the second-stage circulating pump are connected with a second-stage membrane separator group; a plurality of groups of pressure sensors are arranged on the inner side of the pipe wall of a concentrated oil slurry discharging pipeline of the second-stage solid removal device, an electric control valve is arranged at the output end of the second-stage circulating pump, and the plurality of groups of pressure sensors are electrically connected with the electric control valve. According to the system, the second-stage solid removal device is used for further treating concentrated oil slurry generated by the first-stage solid removal device, the concentrated oil slurry generated by the first-stage solid removal device is deeply separated, and the total yield of clarified oil slurry is increased to 99% or above.

Description

TECHNICAL FIELD

[0001] The utility model relates to catalytic cracking oil slurry desolidification equipment technical field, especially improve the catalytic oil slurry desolidification system of clear oil slurry yield. BACKGROUND

[0002] As an important means of heavy oil lightening of oil refinery, the catalytic cracking process is accompanied by continuous popularization and application, and the quantity of by-product catalytic cracking oil slurry increases sharply, and the quality gradually deteriorates. A large amount of silicon-aluminum catalyst is used in the reaction process, and the catalyst powder will be entrained into the catalytic cracking fractionating column and enriched in the oil slurry at the bottom of the fractionating column. Moreover, with the increase of the content of solid particles and condensed ring aromatic hydrocarbons in the catalytic cracking oil slurry, the device is prone to be blocked and coked, the production cost increases, and the resources are wasted. Basically, all kinds of subsequent processing technologies of the catalytic oil slurry with high efficiency value need to remove the catalyst particles in the oil slurry to a certain extent, explore the high value-added utilization, and have important economic value and social benefits.

[0003] As a by-product of the catalytic cracking process, the catalytic cracking oil slurry accounts for about 4-8 w% of the processing capacity of the device, and is a high-quality raw material for producing high-value-added products due to the rich aromatic hydrocarbon components. However, the characteristics of the catalytic cracking process determine that part of the catalyst powder is carried in the oil slurry, and the content is generally 2000-7000 μg / g, which is much higher than the limitation of the downstream device on solid content, becoming a bottleneck for the oil slurry as a ship fuel or further processing and utilization. For a long time, most of the oil slurry is sold as a low-value intermediate product or used as fuel, and the effective utilization rate is less than 20%, resulting in great waste of resources and huge loss of benefits. It is of great significance to remove the solids in the catalytic cracking oil slurry by using appropriate technology for the processing and comprehensive utilization of the catalytic cracking oil slurry.

[0004] The electrostatic separation method is a mature technology developed abroad, but these technologies have problems in the application of oil slurry desolidification in China, such as poor raw material adaptability, complex device structure, and difficult industrialization of process operation. In recent years, there are also some new technologies for oil slurry desolidification, such as inorganic membrane filtration, water washing desolidification, extraction separation, and ultrasonic purification. Due to economic efficiency, raw material adaptability and other problems, they are also difficult to be industrialized at present. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a catalytic oil slurry desolidification system for improving the yield of clear oil slurry, which comprises a primary desolidification device and a secondary desolidification device connected with each other, the primary desolidification device comprises a primary concentrated oil slurry discharge pipeline, the secondary desolidification device comprises a secondary circulation pipeline, a secondary circulation pump and a secondary membrane separator group, the primary concentrated oil slurry discharge pipeline is continuously introduced into the secondary circulation pipeline, the secondary circulation pipeline is connected with the secondary circulation pump, and the secondary circulation pipeline and the secondary circulation pump are connected with the secondary membrane separator group.

[0006] The inside of the pipe wall of the concentrated oil slurry discharge pipeline of the secondary desolidification device is provided with a plurality of groups of pressure sensors, the output end of the secondary circulating pump is provided with an electric control valve, and the plurality of groups of pressure sensors are electrically connected with the electric control valve.

[0007] In some embodiments, the primary concentrated oil slurry discharge pipeline adopts a variable diameter design, and the pipeline diameter of the secondary desolidification device is increased.

[0008] In some embodiments, the secondary membrane separator group uses a membrane tube with a smaller pore size, which inhibits the penetration of solid particles with a larger particle size, and separates the circulating oil slurry into a secondary clarified oil slurry in the shell side and a secondary circulating concentrated oil slurry in the tube side.

[0009] In some embodiments, the primary desolidification device further comprises a primary circulating pump, a primary circulating pipeline, a primary membrane separator group, a primary clarified oil slurry discharge pipeline, and a primary backwashing pipeline, the raw oil slurry pipeline is in communication with the primary circulating pump inlet end of the primary circulating pipeline, the primary circulating pipeline and the primary circulating pump are in communication with the primary membrane separator group, the primary clarified oil slurry discharge pipeline is in communication with the primary membrane separator group, and the primary concentrated oil slurry discharge pipeline is in communication with the primary circulating pipeline.

[0010] In some embodiments, the primary backwashing pipeline is in communication with the outlet of the primary membrane separator group for reverse flushing of the primary membrane separator group.

[0011] In some embodiments, the primary membrane separator group is composed of a single membrane separator or two or more membrane separators in series or parallel, and the membrane separator group separates the circulating oil slurry into a clarified oil slurry in the shell side and a circulating oil slurry in the tube side by using differential pressure penetration.

[0012] In some embodiments, the secondary desolidification device further comprises a secondary concentrated oil slurry discharge pipeline, a secondary clarified oil slurry discharge pipeline, and a secondary backwashing pipeline, the secondary clarified oil slurry discharge pipeline is in communication with the secondary membrane separator group, and the secondary concentrated oil slurry discharge pipeline is in communication with the secondary circulating pipeline.

[0013] In some embodiments, the secondary backwashing pipeline is in communication with the outlet of the secondary membrane separator group for reverse flushing of the secondary membrane separator group.

[0014] In some embodiments, the secondary membrane separator group is composed of a single membrane separator or two or more membrane separators in series or parallel, and the membrane separator group separates the circulating oil slurry into a clarified oil slurry in the shell side and a circulating oil slurry in the tube side by using differential pressure penetration.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The catalytic oil slurry desolidification system for improving the yield of clarified oil slurry provided by the utility model uses a secondary desolidification device to further treat the concentrated oil slurry generated by a primary desolidification device, deeply separates the concentrated oil slurry generated by the primary desolidification device, and improves the total yield of clarified oil slurry to more than 99%, with ash content of the clarified oil slurry being less than 20 mu g / g.

[0017] The catalytic oil slurry desolidification system for improving the yield of clarified oil slurry provided by the utility model has a yield of clarified oil slurry of up to 99%, in actual application, the yield of the secondary desolidification device is reduced according to the real-time pressure inside the concentrated oil slurry discharge pipeline, so as to prevent the problem of clogging of the conveying pipeline during the conveying process of the concentrated oil slurry due to excessively high solid content, and simultaneously prevent excessive wear of the equipment caused by excessively high concentration multiple of the desolidification system, thereby prolonging the service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 A structure schematic view of the primary desolidification device is shown in the catalytic oil slurry desolidification system for improving the yield of clarified oil slurry provided by the utility model embodiment;

[0019] Fig. 2 A structure schematic view of the primary desolidification device is shown in the catalytic oil slurry desolidification system for improving the yield of clarified oil slurry provided by the utility model embodiment;

[0020] Fig. 3 A structure schematic view of the secondary desolidification device is shown in the catalytic oil slurry desolidification system for improving the yield of clarified oil slurry provided by the utility model embodiment;

[0021] Among them, the sign:

[0022] 1 - primary desolidification device;

[0023] 101 - primary concentrated oil slurry discharge pipeline;

[0024] 102 - primary circulating pump;

[0025] 103 - primary circulating pipeline;

[0026] 104 - primary membrane separator group;

[0027] 105 - primary clarified oil slurry discharge pipeline;

[0028] 106 - primary backwashing pipeline;

[0029] 2 - secondary desolidification device;

[0030] 201 - secondary circulating pipeline;

[0031] 202 - secondary circulating pump;

[0032] 203 - secondary membrane separator group;

[0033] 204 - secondary concentrated oil slurry outfeed line;

[0034] 205 - secondary clarified oil slurry outfeed line;

[0035] 206 - secondary backflush line. DETAILED DESCRIPTION

[0036] The technical solutions of the present application will be described in detail below with reference to the drawings and specific embodiments, so as to further understand the purposes, solutions and effects of the present application, but not as a limitation of the protection scope of the appended claims of the present application.

[0037] In the description and the following claims, some words are used to refer to specific components or parts, and those skilled in the art should understand that the same component or part can be referred to by different names or terms by the user or manufacturer. The description and the following claims do not distinguish components or parts by name, but by functional differences. In the entire specification and the following claims, "including" and "containing" are open terms, which should be interpreted as "including but not limited to". In addition, the term "connected" herein includes any direct and indirect electrical connection means. Indirect electrical connection means includes connection through other devices.

[0038] It should be noted that in the description of the present application, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and "about", or "approximately", "substantially", "left and right" and the like indicate the orientation or positional relationship or parameters, etc. based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description content, and do not indicate or imply that the devices or elements referred to must have a specific orientation, a specific size or be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation of the present application.

[0039] Reference Figs. 1-3The utility model provides an embodiment provides a kind of catalytic slurry desolidation system of improving clarified slurry yield, including mutually connected first desolidation device 1 and secondary desolidation device 2, the first desolidation device 1 includes first concentrated slurry discharge pipeline 101, the secondary desolidation device 2 includes secondary circulating pipeline 201, secondary circulating pump 202 and secondary membrane separator group 203, the first concentrated slurry discharge pipeline 101 is introduced into secondary circulating pipeline 201 continuously, the secondary circulating pipeline 201 is connected with the secondary circulating pump 202, the secondary circulating pipeline 201 and the secondary circulating pump 202 are connected with the secondary membrane separator group 203;The inside of the pipe wall of the concentrated slurry discharge pipeline of the secondary desolidation device 2 is equipped with several groups of pressure sensors, the output end of the secondary circulating pump 202 is equipped with electric control valve, and the several groups of pressure sensors are electrically connected with the electric control valve.The first concentrated slurry discharge pipeline 101 uses variable diameter design, and the pipe diameter of the secondary desolidation device pipeline increases.The smaller pore size of the ultra-fine material membrane tube is used in the secondary membrane separator group 203, the solid particles of larger particle size are inhibited to penetrate, and the circulating slurry is separated into shell program secondary clarified slurry and pipe program secondary circulating concentrated slurry.

[0040] The first desolidation device 1 in the catalytic slurry desolidation system for improving clarified slurry yield provided by the embodiment separates raw oil slurry into about 90% first clarified slurry and about 10% first concentrated slurry; the first concentrated slurry is continuously introduced into the secondary desolidation device 2, and the secondary desolidation device 2 separates the first concentrated slurry accounting for about 10% of the total amount of raw oil slurry into about 9% secondary clarified slurry and about 1% secondary concentrated slurry accounting for about 10% of the total amount of raw oil slurry; the first clarified slurry and the secondary clarified slurry are continuously introduced into downstream facilities respectively, or are introduced into downstream facilities after being combined; the total amount of the first clarified slurry and the secondary clarified slurry accounts for about 99% of the raw oil slurry, the total yield of clarified slurry is increased to 99%, the quantity of clarified slurry is increased, and the quality of clarified slurry is improved by improving the ultra-fine material membrane tube to inhibit solid particles of larger particle size, so that the ash content of clarified slurry is less than 20 μg / g.

[0041] Specifically, the primary desolidification device 1 in the embodiment further comprises a primary circulating pump 102, a primary circulating pipeline 103, a primary membrane separator group 104, a primary clarified oil slurry discharge pipeline 105, and a primary backwashing pipeline 106. The raw oil slurry pipeline is in communication with the inlet end of the primary circulating pump 102 of the primary circulating pipeline 103. The primary circulating pipeline 103 and the primary circulating pump 102 are in communication with the primary membrane separator group 104. The primary clarified oil slurry discharge pipeline 105 is in communication with the primary membrane separator group 104. The primary concentrated oil slurry discharge pipeline 101 is in communication with the primary circulating pipeline 103. The primary backwashing pipeline 106 is in communication with the outlet of the primary membrane separator group 104, and is used for backwashing the primary membrane separator group 104. The primary membrane separator group 104 is composed of a single membrane separator or two or more membrane separators connected in series or in parallel. The membrane separator group 104 separates the circulating oil slurry into shell-side clarified oil slurry and tube-side circulating oil slurry by using differential pressure penetration.

[0042] In the embodiment, the raw oil slurry is continuously introduced into the inlet end of the primary circulating pump 102 of the primary circulating pipeline 103, and is combined with the circulating oil slurry in the device. The raw oil slurry is pressurized by the primary circulating pump 102, and is introduced into the tube-side inlet of the radial flow continuous penetration primary membrane separator group 104. The clarified oil slurry is continuously discharged from the device through the primary clarified oil slurry discharge pipeline 105. Most of the circulating concentrated oil slurry is introduced into the inlet end of the primary circulating pump 102 through the primary circulating pipeline 103, combined with the continuously introduced raw oil slurry, and then continuously circulated in the primary circulating pipeline 103. A small part of the circulating oil slurry is continuously introduced from the primary circulating pipeline 103 after the tube-side outlet of the last membrane separator, and is continuously introduced out of the primary desolidification device 1 through the primary concentrated oil slurry discharge pipeline 101, which is called the primary concentrated oil slurry.

[0043] If the pressure difference between the tube side and the shell side of the primary membrane separator group 104 gradually increases to significantly affect the flow and yield of the clarified oil slurry, the backwashing liquid can be introduced from the shell-side outlet of each membrane separator through the primary backwashing pipeline 106 to backwash each membrane separator, so as to restore the effective flux of the membrane separator. The backwashing liquid can be the clarified oil slurry produced by the desolidification device, or an external pressurized fluid such as wax oil or diesel oil. After the backwashing is completed, the device returns to normal filtration.

[0044] The primary desolidification device 1 separates the raw oil slurry into about 90% of the primary clarified oil slurry and about 10% of the primary concentrated oil slurry. All the catalyst particles in the raw oil slurry are enriched in the primary concentrated oil slurry. The primary concentrated oil slurry is continuously introduced into the secondary desolidification device 2.

[0045] Further, the secondary desolidification device 2 in the embodiment also comprises a secondary concentrated oil slurry discharge pipeline 204, a secondary clarified oil slurry discharge pipeline 205 and a secondary backwashing pipeline 206. The secondary clarified oil slurry discharge pipeline 205 is in communication with the secondary membrane separator group 203, and the secondary concentrated oil slurry discharge pipeline 204 is in communication with the secondary circulating pipeline 201. The secondary backwashing pipeline 206 is in communication with the outlet of the secondary membrane separator group 203, and is used for backwashing the secondary membrane separator group 203. The secondary membrane separator group 203 is composed of a single membrane separator or two or more membrane separators connected in series or in parallel. The membrane separator group separates the circulating oil slurry into shell-side clarified oil slurry and tube-side circulating oil slurry by using differential pressure penetration.

[0046] In more detail, the primary concentrated oil slurry discharge pipeline 101 in the secondary desolidification device 2 in the embodiment is designed with a variable diameter, and is continuously introduced into the secondary circulating pipeline 201 of the secondary desolidification device 2. The secondary desolidification device 2 increases the pipeline diameter, and the secondary circulating pump 202 pressurizes the inlet of the secondary membrane separator group 203. A plurality of groups of pressure sensors are arranged on the inner side of the wall of the concentrated oil slurry discharge pipeline of the secondary desolidification device 2, and an electric control valve is arranged at the output end of the secondary circulating pump 202. The plurality of groups of pressure sensors are electrically connected to the electric control valve. Smaller aperture pore material membrane tubes are used in the secondary membrane separator group 203, so as to inhibit the penetration of solid particles with a larger particle size, and separate the circulating oil slurry into shell-side secondary clarified oil slurry and tube-side secondary circulating concentrated oil slurry. The secondary clarified oil slurry is continuously introduced out of the device through the secondary clarified oil slurry discharge pipeline 205. Most of the secondary circulating concentrated oil slurry is introduced into the inlet of the secondary circulating pump 202 through the secondary concentrated oil slurry circulating pipeline, and is combined with the continuously introduced primary concentrated oil slurry, and then continues to circulate in the secondary circulating pipeline 201. A small part of the secondary circulating concentrated oil slurry is introduced out of the secondary circulating pipeline 201 after the outlet of the last membrane separator, and is continuously introduced out of the device through the secondary concentrated oil slurry discharge pipeline 204. The secondary desolidification device 2 can also use secondary backwashing liquid to backwash the membrane tubes.

[0047] In summary, in the utility model, the viscosity of the first concentrated oil slurry is very large due to the enrichment of solid particles, and the flowability is poor in the actual production process, therefore, a variable diameter design is adopted at the connection of the two-stage desolidification device, the pipe diameter of the second-stage feeding pipeline is further increased, and the concentrated oil slurry is conveniently conveyed. On this basis, a plurality of groups of pressure sensors are arranged on the inner side of the pipe wall of the concentrated oil slurry discharge pipeline of the second-stage desolidification device, an electric control valve is arranged at the output end of the second-stage circulating pump, and the plurality of groups of pressure sensors are electrically connected with the electric control valve. The first concentrated oil slurry is continuously introduced into the circulating pipeline from the inlet of the circulating pump of the circulating pipeline of the second-stage desolidification device and combined with the original circulating oil slurry in the device to form a second-stage circulating oil slurry; the second-stage circulating oil slurry is pressurized by the second-stage circulating pump and introduced into the inlet of the second-stage separation membrane group. The second-stage separation membrane group separates the second-stage circulating oil slurry into a shell-stage second-stage clarified oil slurry and a tube-stage second-stage circulating oil slurry; the second-stage clarified oil slurry is continuously introduced out of the second-stage desolidification device through the second-stage clarified oil slurry discharge pipeline, and the second-stage clarified oil slurry can be combined with the first-stage clarified oil slurry and introduced into the downstream facility or can be introduced into the downstream facility respectively. Most of the second-stage circulating oil slurry is introduced into the inlet of the second-stage circulating pump through the concentrated oil slurry circulating pipeline, combined with the continuously introduced first concentrated oil slurry, and continuously circulated in the second-stage desolidification device; a small part of the second-stage circulating oil slurry is introduced out of the pipeline after the tube-stage outlet of the second-stage membrane separator, continuously introduced out of the second-stage desolidification device through the second-stage concentrated oil slurry discharge pipeline, and becomes second-stage concentrated oil slurry. The second-stage desolidification device separates about 10% of the first concentrated oil slurry in the total raw oil slurry into about 9% of the second-stage clarified oil slurry and about 1% of the second-stage concentrated oil slurry. The total amount of the clarified oil slurry separated by the first-stage desolidification device and the second-stage desolidification device accounts for about 99% of the raw oil slurry, that is, the total yield of the clarified oil slurry is 99%. Compared with the first-stage desolidification device, the second-stage desolidification device not only increases the pipe diameter, but also uses an ultra-fine material membrane tube with a smaller pore size in the membrane separator group, thereby inhibiting the penetration of solid particles with a larger particle size, and at the same time, the conveying pressure of the second-stage circulating pump is increased to ensure that the clarified oil slurry can smoothly penetrate into the shell. On the one hand, the total yield of the clarified oil slurry can reach 99%, and the amount of the clarified oil slurry is increased, and on the other hand, the quality of the clarified oil slurry is improved, and compared with the first-stage desolidification device, the second-stage desolidification device can obtain clarified oil slurry with less solid particles and lower ash content (the ash content is less than 20 μg / g), which can be further used to produce high-value-added carbon fiber materials.

[0048] When the secondary concentrated oil slurry is discharged through the concentrated oil slurry discharge pipeline of the secondary desolidification device, a plurality of groups of pressure sensors detect the pressure applied by the concentrated oil slurry on the inner side of the pipeline wall in real time. When the pressure is detected to be too large, the electric control valve is closed to stop the first-stage concentrated oil slurry from being transported by the secondary circulating pump, thereby preventing the concentrated oil slurry from being blocked in the pipeline during transportation due to the excessively high solid content. After the electric control valve is closed to stop the secondary circulating pump, the first-stage desolidification device continues to operate normally, and the overall desolidification efficiency is not affected. At this time, the operator can adjust the yield of the secondary desolidification device and use the backflushing liquid to perform reverse flushing on the membrane tube, thereby reducing the excessive wear of the equipment and prolonging the service life of the equipment. As the separation and concentration proceed, a small amount of solid particles and macromolecular organic substances slowly accumulate on the inner wall of the membrane tube of the first-stage desolidification device and the second-stage desolidification device, causing the effective flux of the membrane tube to slowly decrease and the pressure difference between the inside and outside of the membrane tube to slowly increase. When the effective flux of the membrane tube decreases to significantly affect the flow rate and yield of the clarified oil slurry, a pressurized fluid can be introduced from the shell side outlet of each membrane separator in a reverse direction to perform reverse flushing, so as to restore the effective flux of the membrane tube. The pressurized fluid can be the clarified oil slurry of the desolidification device itself or the pressurized wax oil or diesel oil from the outside. The control of the backflushing is realized by the control program in cooperation with the related program-controlled valves and instruments.

[0049] The technology can keep the equipment continuously and stably operating under the premise of obtaining extremely low-ash clarified oil slurry, and avoids the problem that the filtration efficiency, pressure difference control and backflushing effect cannot be considered simultaneously when the oil slurry is treated by the traditional dead-end filtration method. The membrane tube in the membrane separator can be a tubular object made of various porous media, including but not limited to metal, ceramic, silicon carbide or other porous materials that can withstand a temperature above 200 DEG C. Due to good temperature resistance, mechanical ductility and mechanical strength, the desolidification device provided by the utility model preferably uses a membrane tube made of metal. Compared with the first-stage desolidification device, the second-stage desolidification device uses a membrane tube made of extremely fine material with a smaller pore size in the membrane separator group, so as to inhibit the penetration of solid particles with a larger particle size, and at the same time, the delivery pressure of the secondary circulating pump is increased to ensure that the clarified oil slurry can smoothly penetrate into the shell side.

[0050] The above is only a preferred embodiment of the utility model, and does not limit the utility model in other forms. Any person skilled in the art can modify or change the above disclosed technology content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the utility model still belong to the protection scope of the utility model technical scheme.

Claims

1. A catalytic slurry desolidification system for improving the yield of clarified slurry, characterized in that: The device includes a primary desolidification unit and a secondary desolidification unit connected to each other. The primary desolidification unit includes a primary concentrated oil slurry discharge pipeline, and the secondary desolidification unit includes a secondary circulation pipeline, a secondary circulation pump, and a secondary membrane separator assembly. The primary concentrated oil slurry discharge pipeline is continuously introduced into the secondary circulation pipeline. The secondary circulation pipeline is connected to the secondary circulation pump, and the secondary circulation pipeline and the secondary circulation pump are connected to the secondary membrane separator assembly. The inner wall of the concentrated oil slurry discharge pipeline of the secondary desolidification device is equipped with several sets of pressure sensors, and the output end of the secondary circulation pump is equipped with an electric control valve. The several sets of pressure sensors are electrically connected to the electric control valve.

2. The catalytic slurry desolidification system for improving the yield of clarified slurry according to claim 1, characterized in that: The primary concentrated oil slurry discharge pipeline adopts a variable diameter design, and the pipeline diameter of the secondary desolidification device is increased.

3. The catalytic slurry desolidification system for improving the yield of clarified slurry according to claim 1, characterized in that: The secondary membrane separator assembly uses ultra-fine membrane tubes with smaller pore sizes to suppress the permeation of large-diameter solid particles, separating the circulating slurry into shell-side secondary clarified slurry and tube-side secondary circulating concentrated slurry.

4. The catalytic slurry desolidification system for improving the yield of clarified slurry according to claim 1, characterized in that: The catalytic slurry desolidification system also includes a raw material slurry pipeline; the primary desolidification device further includes: a primary circulation pump, a primary circulation pipeline, a primary membrane separator group, a primary clarified slurry discharge pipeline, and a primary backwashing pipeline. The raw material slurry pipeline is connected to the inlet end of the primary circulation pump of the primary circulation pipeline. The primary circulation pipeline and the primary circulation pump are connected to the primary membrane separator group. The primary clarified slurry discharge pipeline is connected to the primary membrane separator group. The primary concentrated slurry discharge pipeline is connected to the primary circulation pipeline.

5. The catalytic slurry desolidification system for improving the yield of clarified slurry according to claim 4, characterized in that: The primary backwashing pipeline is connected to the outlet of the primary membrane separator group and is used to backwash the primary membrane separator group.

6. The catalytic slurry desolidification system for improving the yield of clarified slurry according to claim 4, characterized in that: The primary membrane separator group consists of a single membrane separator, or two or more membrane separators connected in series or parallel. The membrane separator group uses differential pressure osmosis to separate the circulating oil slurry into shell-side clarified oil slurry and tube-side circulating oil slurry.

7. The catalytic slurry desolidification system for improving the yield of clarified slurry according to claim 1, characterized in that: The secondary desolidification device also includes a secondary concentrated slurry discharge pipeline, a secondary clarified slurry discharge pipeline, and a secondary backwashing pipeline. The secondary clarified slurry discharge pipeline is connected to the secondary membrane separator assembly, and the secondary concentrated slurry discharge pipeline is connected to the secondary circulation pipeline.

8. The catalytic slurry desolidification system for improving the yield of clarified slurry according to claim 7, characterized in that: The secondary backwashing pipeline is connected to the outlet of the secondary membrane separator group and is used to backwash the secondary membrane separator group.

9. The catalytic slurry desolidification system for improving the yield of clarified slurry according to claim 7, characterized in that: The secondary membrane separator group consists of a single membrane separator, or two or more membrane separators connected in series or parallel. The membrane separator group uses differential pressure osmosis to separate the circulating oil slurry into shell-side clarified oil slurry and tube-side circulating oil slurry.

Images