A catalytic slurry oil heavy oil dewatering device, system and application thereof

Abstract

This invention discloses a catalytic oil slurry heavy oil dehydration device, system, and its application. The device may include: a dehydration tank, several heating rods, and a stirring assembly; wherein, a dehydrator, an exhaust pipe, and a pressure gauge are installed on the top wall of the dehydration tank, and a discharge pipe is installed at the bottom of the dehydration tank; several heating rods are vertically arranged inside the dehydration tank; the stirring assembly includes: a motor housing, a motor, a central shaft, several stirring rods, and a reciprocating screw; the motor housing is fixed to the outside of the dehydration tank wall, and the motor is installed in the motor housing; the reciprocating screw is located on the inside of the dehydration tank wall, away from the motor housing; the central shaft is located inside the dehydration tank, one end of which is connected to the reciprocating screw, and the other end extends out of the dehydration tank and connects to the output end of the motor; several stirring rods are connected to the central shaft and are offset from the heating rods; the motor drives the central shaft to rotate, thereby driving the stirring rods to rotate and reciprocatingly stirring the catalytic oil slurry heavy oil in the dehydration tank under the action of the reciprocating screw.

Description

Technical Field

[0001] This invention relates to the field of catalytic cracking technology, and in particular to a catalytic slurry heavy oil dehydration device, system, and its application. Background Technology

[0002] Catalytic cracking is one of the important processes for lightening heavy oil. 80% of gasoline used in Chinese vehicles comes from catalytic cracking. As of the end of 2022, my country's crude oil processing scale exceeded 420 million tons / year, and the catalytic cracking processing scale exceeded 100 million tons / year. Catalytic cracking is an important refining technology, and dehydration equipment is widely used in catalytic cracking units.

[0003] The prior art CN201821996799.4 discloses a dehydration tank for heavy oil components in catalytic slurry. It includes a horizontal tank body and supports symmetrically arranged at the bottom of the tank body. A dehydrator is provided on the top wall of the tank body. A vacuum port is provided at the top of the dehydrator. A feed port is provided on the middle wall of the dehydrator. A demister, a distributor and a packing layer are arranged in sequence from bottom to top in the dehydrator. The feed port is located between the demister and the distributor. A discharge port is provided on the bottom wall of the tank body. Summary of the Invention

[0004] To increase the selection space and enhance the heat transfer effect when heating heavy oil components in catalytic slurry, a catalytic slurry heavy oil dehydration device, system and its application are proposed.

[0005] In a first aspect, embodiments of the present invention provide a catalytic slurry heavy oil dehydration device, which may include: a dehydration tank, a plurality of heating rods, and a stirring assembly;

[0006] The dehydration tank is equipped with a dehydrator, an exhaust pipe and a pressure gauge on the top wall, and a discharge pipe is provided at the bottom of the dehydration tank.

[0007] Several heating rods are vertically arranged inside the dehydration tank;

[0008] The stirring assembly may include: a motor housing, a motor, a central shaft, several stirring rods, and a reciprocating screw; wherein, the motor housing is fixed to the outside of the dehydration tank wall, and the motor is disposed in the motor housing; the reciprocating screw is disposed on the inside of the dehydration tank wall, with one end away from the motor housing; the central shaft is located inside the dehydration tank, with one end connected to the reciprocating screw and the other end extending out of the dehydration tank and connected to the output end of the motor; several stirring rods are connected to the central shaft and are offset from the heating rods; the motor drives the central shaft to rotate, thereby causing the stirring rods to rotate and, under the action of the reciprocating screw, reciprocatingly stirring the catalytic oil slurry heavy oil in the dehydration tank.

[0009] Optionally, the stirring rod is vertically connected to the central shaft.

[0010] Optionally, the inner diameter of the dehydration tank is 1.5 to 2.5 m, the distance between the end of the stirring rod away from the central shaft and the inner wall of the dehydration tank is 1 to 10 cm, the first distance between adjacent heating rods is 0.4 to 0.8 m, the second distance between the stirring rod and adjacent heating rods is 0.2 to 0.4 m, and the reciprocating amplitude of the reciprocating screw is 0.1 to 0.9 times the second distance.

[0011] Optionally, the middle part of the stirring rod is perpendicularly connected to the central shaft; or, the end of the stirring rod is perpendicularly connected to the central shaft, and the opposite stirring rods are located on the same straight line.

[0012] Optionally, the dehydration tank is filled with a rock wool insulation layer.

[0013] Optionally, the motor housing is provided with multiple heat dissipation vents.

[0014] In a second aspect, embodiments of the present invention provide a catalytic slurry heavy oil dehydration system, which may include: a control device and a catalytic slurry heavy oil dehydration device as described in the first aspect;

[0015] The exhaust pipe and discharge pipe of the catalytic slurry heavy oil dehydration equipment are equipped with solenoid valves.

[0016] The control device is electrically connected to the dehydrator, the solenoid valve, the heating rod and the motor to control the catalytic slurry heavy oil dehydration equipment to perform dehydration operations on the catalytic slurry heavy oil in the dehydration tank.

[0017] Optionally, the system may further include: a feeding device, which is connected to the catalytic slurry heavy oil dehydration device through the feed inlet of the dehydrator.

[0018] Thirdly, embodiments of the present invention provide an application of the catalytic slurry heavy oil dehydration equipment as described in the first aspect in the catalytic cracking process.

[0019] Optionally, the reciprocating cycle of the reciprocating screw is 3 to 10 seconds, the speed of the motor is 50 to 100 r / min, and the heating temperature of the heating rod is 200 to 300°C.

[0020] The beneficial effects of the above-mentioned technical solutions provided in the embodiments of the present invention include at least the following:

[0021] This invention provides a catalytic oil slurry heavy oil dehydration device, system, and its application. The device heats the catalytic oil slurry heavy oil using multiple heating rods to evaporate the water. A motor drives a central shaft to rotate, which in turn rotates the stirring rods, ensuring uniform heating of the heavy oil. Furthermore, during rotation, the central shaft and a reciprocating screw work together to move the stirring rods back and forth perpendicular to the rotation direction, resulting in simultaneous stirring in a three-dimensional space. This improves the stirring effect on the catalytic oil slurry heavy oil, making the heating more uniform and the dehydration effect better. Moreover, the device provided in this invention, with the heating rods vertically positioned inside the dehydration tank, avoids the problem of slow heating of the catalytic oil slurry heavy oil at the top of the tank and the drawbacks of frequent cleaning and scaling of heating devices placed horizontally at the bottom of the tank.

[0022] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0023] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is one of the structural diagrams of the catalytic oil slurry heavy oil dehydration equipment provided in the embodiments of the present invention;

[0026] Figure 2 This is the second structural diagram of the catalytic oil slurry heavy oil dehydration equipment provided in the embodiments of the present invention;

[0027] Figure 3 This is a schematic diagram of the catalytic slurry heavy oil dehydration system provided in an embodiment of the present invention;

[0028] Among them, 1-catalytic slurry heavy oil dehydration equipment; 2-control equipment; 3-feeding equipment;

[0029] 11-Dehydration tank; 12-Heating rod; 13-Stirring assembly;

[0030] 111-Dehydrator; 112-Exhaust pipe; 113-Pressure gauge; 114-Discharge pipe; 115-Rock wool insulation layer;

[0031] 131-Motor housing; 132-Motor; 133-Central shaft; 134-Agitator rod; 135-Reciprocating lead screw; 1311-Heat vent. Detailed Implementation

[0032] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "far," "near," "front," and "rear," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0035] The inventors have discovered that in existing technologies, when a fixed heating coil is used to heat heavy oil components in catalytic oil slurry, the heating coil can only heat the heavy oil components closest to it. Components further away from the heating coil are heated slowly, resulting in poor heating efficiency. Furthermore, due to the high density of heavy oil, the oil near the heating coil is prone to crusting after cooling, requiring frequent manual cleaning. If cleaning is not timely, the heating coil cannot transfer heat to the heavy oil components during heating, potentially leading to explosions or other safety accidents. In view of these problems, this invention is proposed to provide a catalytic oil slurry heavy oil dehydration device, system, and its application that overcomes or at least partially solves these problems.

[0036] Reference Figure 1 and Figure 2As shown, this embodiment of the invention provides a catalytic oil slurry heavy oil dehydration device 1, which may include: a dehydration tank 11, a plurality of heating rods 12, and a stirring assembly 13; wherein, a dehydrator 111, an exhaust pipe 112, and a pressure gauge 113 are provided on the top wall of the dehydration tank 11, and a discharge pipe 114 is provided at the bottom of the dehydration tank 11; the plurality of heating rods 12 are vertically arranged inside the dehydration tank 11; the stirring assembly 13 may include: a motor housing 131, a motor 132, a central shaft 133, a plurality of stirring rods 134, and a reciprocating lead screw 135; wherein, the motor housing 131 is fixed to the dehydration tank 11. On the outside of the tank wall, the motor 132 is installed in the motor housing 131; the reciprocating screw 135 is installed on the inside of the tank wall of the dehydration tank 11, and at one end away from the motor housing 131; the central shaft 133 is located inside the dehydration tank 11, with one end connected to the reciprocating screw 135 and the other end extending out of the dehydration tank 11 and connected to the output end of the motor 132; several stirring rods 134 are connected to the central shaft 133 and are offset from the heating rod 12; the motor 132 drives the central shaft 133 to rotate so as to drive the stirring rods 134 to rotate and reciprocate the heavy catalytic oil slurry in the dehydration tank 11 under the action of the reciprocating screw 135.

[0037] The dehydration tank in this embodiment of the invention is a horizontal dehydration tank, which is used to evaporate water from heavy oil. The horizontal design increases the liquid surface area at the top of the tank, facilitating efficient evaporation of water from the heavy oil, reducing evaporation time, and improving evaporation efficiency. The central shaft in this embodiment can be sleeved on the outer wall of the reciprocating lead screw. In specific implementation, because the dehydration tank in this embodiment is relatively large, i.e., its horizontal length is long, the central shaft can be divided into at least two sections to facilitate installation and connection. When divided into two sections, one section penetrates the tank wall and connects to the output end of the motor, while the other section is entirely located inside the dehydration tank.

[0038] It should be noted that the dehydration tank is equipped with a mounting bracket on its outer side, and the motor box can be connected to the dehydration tank via the mounting bracket. For stable installation, the connection can be made by welding. It should also be noted that in this embodiment, the dehydration equipment is equipped with a feed pipe on the dehydrator. The heavy catalytic oil slurry from the feeding equipment is injected into the dehydration tank through the feed pipe on the dehydrator, which can separate the heavy catalytic oil slurry from the water. The exhaust pipe on the dehydration tank can discharge water vapor to ensure the safety of the internal air pressure. The pressure gauge can measure the internal air pressure value for timely adjustment. The discharge pipe at the bottom of the dehydration tank can discharge the dehydrated heavy oil in a timely manner. The dehydrator, exhaust pipe, and discharge pipe can all be equipped with safety valves or solenoid valves for connection to control equipment for management.

[0039] The catalytic oil slurry heavy oil dehydration equipment provided in this embodiment of the invention heats the catalytic oil slurry heavy oil using multiple heating rods to evaporate the water in the oil. A motor drives the central shaft to rotate, which in turn rotates the stirring rods, ensuring uniform heating of the heavy oil. Furthermore, during rotation, the central shaft and reciprocating screw work together to move the stirring rods back and forth perpendicular to the rotation direction, resulting in simultaneous stirring in a three-dimensional space. This improves the stirring effect on the catalytic oil slurry heavy oil, making the heating more uniform and the dehydration effect better. Moreover, because the heating rods are vertically positioned inside the dehydration tank, the equipment avoids the problem of slow heating of the catalytic oil slurry heavy oil at the top of the tank, and also avoids the drawbacks of frequent cleaning and scaling of heating devices placed horizontally at the bottom of the tank.

[0040] In an optional embodiment, refer to Figure 1 As shown, the stirring rod 134 is perpendicularly connected to the central shaft 133. In order to enhance the stirring efficiency of the horizontal tank, the inventors set the stirring rod to be perpendicular to the tank in the specific implementation. Compared with the vertical tank, the length of the stirring rod can also be shortened. This is because the density of heavy oil is relatively high, and the stirring rod receives stronger resistance during stirring. If the stirring rod is too long, there will be a greater risk of breakage. Therefore, the stirring rod in the horizontal tank is set to be vertical.

[0041] In another alternative embodiment, the inventors discovered that for heavy oils with high density, a layer of heavy oil may remain unmixed at the bottom of the stirring rod. To enhance the dehydrator's performance, the following settings were optimized: vertical inner diameter D of the dehydrator, length d of the stirring rod (d refers to the length of the two rods integrated together), distance L1 between adjacent stirring rods, distance L2 between the stirring rod and adjacent heating rod, and reciprocating amplitude L3 of the reciprocating screw. (Refer to...) Figure 1 As shown, the inner diameter D of the dehydration tank is 1.5 to 2.5 m, the distance (Dd) between the end of the stirring rod away from the central shaft and the inner wall of the dehydration tank is 1 to 10 cm, the first distance L1 between adjacent stirring rods is 0.4 to 0.8 m, the first distance between adjacent heating rods is 0.4 to 0.8 m, the second distance L2 between the stirring rod and the adjacent heating rod is 0.2 to 0.4 m, and the reciprocating amplitude L3 of the reciprocating screw is 0.1 to 0.9 times the second distance L2.

[0042] In this embodiment of the invention, the number of heating rods and stirring rods is not specifically limited. Since heating is achieved through heat transfer, the closer to the heating rod, the higher the heat. Heat superposition occurs between two heating rods, thus avoiding uneven heating caused by excessive distance from the heating rods. The heating rods are fixed to the tank wall and located at the center between the two heating rods. This ensures both uniform heating and allows for heat superposition between the two heating rods, preventing uneven heating caused by excessive distance from the heating rods. The temperature of the heating rods is generally controlled between 200 and 300°C. This is because the concentration of heavy oil is high, the heating rate is slow, and the center temperature of the tank needs to be above 100°C to ensure that all water vapor in the heavy oil in the tank evaporates, thereby achieving the dehydration effect.

[0043] In another alternative embodiment, refer to Figure 1 As shown, the middle part of the stirring rod is perpendicularly connected to the central shaft; or, the end of the stirring rod is perpendicularly connected to the central shaft, and the opposite stirring rods are located on the same straight line.

[0044] The stirring rod in this embodiment of the invention can be rod-shaped, blade-shaped, or plate-shaped; the specific structure is not limited in this embodiment. In specific implementation, the stirring rod can have two structures: one with a length greater than the radius of the dehydration tank but less than its diameter, and the other with a length less than the radius of the dehydration tank. In the first type, the middle part is vertically installed when connected to the central shaft; in the second type, the end of the stirring rod is vertically installed on the central shaft. To ensure uniform force on the central shaft, the two opposing stirring rods are located on the same straight line. More preferably, all stirring rods are located in the same plane, resulting in more uniform rotation and a consistent flow pattern of the heavy oil fluid during stirring, avoiding turbulence or uneven heating.

[0045] In another alternative embodiment, refer to Figure 1 As shown, the wall of the dehydration tank 11 is filled with a rock wool insulation layer 115. In this embodiment, the rock wool insulation layer can effectively isolate the inside and outside of the dehydration tank to keep it warm and prevent heat loss, thereby achieving the best dehydration effect.

[0046] In another alternative embodiment, refer to Figure 1 and Figure 2 As shown, the motor housing 131 is provided with multiple heat dissipation vents 1311. In this embodiment of the invention, the heat dissipation vents provided on the motor housing are preferably distributed at equal intervals, which can effectively dissipate the heat generated by the motor in a timely manner and avoid the motor from malfunctioning due to heat accumulation.

[0047] Based on the same inventive concept, this invention also provides a catalytic slurry heavy oil dehydration system, referring to... Figure 3 As shown, the system may include: a control device 2 and the aforementioned catalytic slurry heavy oil dehydration device 1; the exhaust pipe and discharge pipe of the catalytic slurry heavy oil dehydration device are equipped with solenoid valves; the control device is electrically connected to the dehydrator, solenoid valves, heating rods and motor to control the catalytic slurry heavy oil dehydration device to perform dehydration operations on the catalytic slurry heavy oil in the dehydration tank.

[0048] In another alternative embodiment, refer to Figure 3 As shown, the system may also include: a feeding device 3, which is connected to the catalytic oil slurry heavy oil dehydration device 1 through the feed inlet of the dehydrator.

[0049] Based on the same inventive concept, this embodiment of the invention also provides an application of the above-mentioned catalytic slurry heavy oil dehydration equipment in the catalytic cracking process.

[0050] In another optional embodiment, the reciprocating cycle of the reciprocating screw is 3 to 10 seconds, the speed of the motor is 50 to 100 r / min, and the heating temperature of the heating rod is 200 to 300°C.

[0051] The following examples demonstrate the dehydration effect. It should be noted that Examples 1-3 and Comparative Example 1 are illustrated with the middle part of the stirring rod perpendicularly connected to the central shaft, as follows:

[0052] Example 1

[0053] The vertical inner diameter D of the dehydration tank is 1.5m long, the length d of the stirring rod is 1.45m, the distance L1 between two adjacent stirring rods is 0.4m, and the distance L2 between the stirring rod and the adjacent heating rod is 0.2m. Heavy catalytic slurry is injected into the dehydration tank through a dehydrator. Injection stops when the tank reaches 2 / 3 of its height. The density of the heavy catalytic slurry is 0.9836 g / ml. The motor in the motor box is started, with the reciprocating screw amplitude L3 set to 0.1 m and the reciprocating cycle to 3 s. The stirring rod rotation speed is set to 100 r / min, and the heating rod temperature is set to 300℃. The slurry temperature in the dehydration tank rises to 110℃. The pressure gauge displays the pressure in the dehydration tank in real time. When the water vapor pressure in the dehydration tank exceeds 0.5 MPa, the safety valve connected to the exhaust pipe automatically opens, continuously releasing water vapor. When the pressure in the dehydration tank falls below 0.5 MPa, the safety valve automatically resets and closes. After stirring for 2 hours, the water content of the slurry in the dehydration tank is measured to be 0.4%. The solenoid valve of the discharge pipe is then opened, and the dehydrated catalytic slurry is discharged from the dehydration tank.

[0054] Example 2

[0055] The vertical inner diameter D of the dehydration tank is 2.0m, the length d of the stirring rod is 1.98m, the distance L1 between two adjacent stirring rods is 0.5m, and the distance L2 between the stirring rod and the adjacent heating rod is 0.25m. Heavy catalytic slurry is injected into the dehydration tank through a dehydrator. Injection stops when the tank reaches 2 / 3 of its height. The density of the heavy catalytic slurry is 0.9836 g / ml. The motor in the motor box is started, and the reciprocating screw amplitude L3 is set to 0.2 m with a reciprocating cycle of 4 s. The stirring rod rotation speed is set to 50 r / min, and the heating rod temperature is set to 200℃. The slurry temperature in the dehydration tank rises to 100℃. The pressure gauge displays the pressure in the dehydration tank in real time. When the water vapor pressure in the dehydration tank exceeds 0.5 MPa, the safety valve connected to the exhaust pipe automatically opens, continuously releasing water vapor. When the pressure in the dehydration tank falls below 0.5 MPa, the safety valve automatically resets and closes. After stirring for 2 hours, the water content of the slurry in the dehydration tank is measured to be 0.5%. The solenoid valve of the discharge pipe is then opened, and the dehydrated catalytic slurry is discharged from the dehydration tank.

[0056] Example 3

[0057] The vertical inner diameter D of the dehydration tank is 2.5m long, the length d of the stirring rod is 2.4m, the distance L1 between two adjacent stirring rods is 0.8m, and the distance L2 between the stirring rod and the adjacent heating rod is 0.4m. Heavy catalytic slurry is injected into the dehydration tank through a dehydrator. Injection stops when the tank reaches 2 / 3 of its height. The density of the heavy catalytic slurry is 0.9836 g / ml. The motor in the motor box is started, with the reciprocating screw amplitude L3 set to 0.3 m and the reciprocating cycle to 10 s. The stirring rod rotation speed is set to 80 r / min, and the heating rod temperature is set to 250℃. The slurry temperature in the dehydration tank rises to 100℃. The pressure gauge displays the pressure in the dehydration tank in real time. When the water vapor pressure in the dehydration tank exceeds 0.5 MPa, the safety valve connected to the exhaust pipe automatically opens, continuously releasing water vapor. When the pressure in the dehydration tank falls below 0.5 MPa, the safety valve automatically resets and closes. After stirring for 2 hours, the water content of the slurry in the dehydration tank is measured to be 0.1%. The solenoid valve of the discharge pipe is then opened, and the dehydrated catalytic slurry is discharged from the dehydration tank.

[0058] Comparative Example 1

[0059] The vertical inner diameter D of the dehydration tank is 3m long, the length d of the stirring rod is 2.5m, the distance L1 between two adjacent stirring rods is 1m, and the distance L2 between the stirring rod and the adjacent heating rod is 0.5m. Heavy catalytic slurry is injected into the dehydration tank through a dehydrator. Injection stops when the tank reaches 2 / 3 of its height. The density of the heavy catalytic slurry is 0.9836 g / ml. The motor in the motor box is started, with the reciprocating screw amplitude L3 set to 0.4 m and the reciprocating cycle to 15 s. The stirring rod rotation speed is set to 20 r / min, and the heating rod temperature is set to 150℃. The slurry temperature in the dehydration tank rises to 100℃. The pressure gauge displays the pressure in the dehydration tank in real time. When the water vapor pressure in the dehydration tank exceeds 0.5 MPa, the safety valve connected to the exhaust pipe automatically opens, continuously releasing water vapor. When the pressure in the dehydration tank falls below 0.5 MPa, the safety valve automatically resets and closes. After stirring for 2 hours, the water content of the slurry in the dehydration tank is measured to be 1.0%. The solenoid valve of the discharge pipe is then opened, and the dehydrated catalytic slurry is discharged from the dehydration tank.

[0060] Compared to Comparative Example 1, using the design parameters of Examples 1-3, the vertical inner diameter D of the dehydration tank is 1.5m-2.5m, the difference between the vertical inner diameter D of the dehydration tank and the length d of the stirring rod is 2cm-10cm, the distance L1 between two adjacent stirring rods is 0.4m-0.8m, and since the heating rod is located in the middle of the two stirring rods, the distance L2 between the stirring rod and the adjacent heating rod is L1 / 2. The reciprocating amplitude L3 of the reciprocating screw is L2 / 10 to L2×9 / 10, the reciprocating cycle (one reciprocating cycle between the stirring rod and the adjacent heating rod) is 3s-10s, and the rotation speed of the stirring rod driven by the central shaft is 50-100r / min, resulting in a better dehydration effect, and the water content of the dehydrated catalytic oil slurry is no more than 0.5%.

[0061] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. This disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims. Thus, if these modifications and variations of the invention fall within the scope of the claims of the invention and their equivalents, the invention is also intended to include these modifications and variations.

Claims

1. A catalytic slurry heavy oil dehydration device, characterized in that, include: Dehydration tank, several heating rods, stirring assembly; The dehydration tank is equipped with a dehydrator, an exhaust pipe and a pressure gauge on the top wall, and a discharge pipe is provided at the bottom of the dehydration tank. Several heating rods are vertically arranged inside the dehydration tank; The stirring assembly includes: a motor housing, a motor, a central shaft, several stirring rods, and a reciprocating screw; wherein, the motor housing is fixed to the outside of the dehydration tank wall, and the motor is disposed in the motor housing; the reciprocating screw is disposed on the inside of the dehydration tank wall, with one end away from the motor housing; the central shaft is located inside the dehydration tank, with one end connected to the reciprocating screw and the other end extending out of the dehydration tank and connected to the output end of the motor; several stirring rods are connected to the central shaft and are offset from the heating rods; the motor drives the central shaft to rotate, thereby causing the stirring rods to rotate, and under the action of the reciprocating screw, the catalytic oil slurry heavy oil in the dehydration tank is reciprocated and stirred. The inner diameter of the dehydration tank is 1.5~2.5m, the distance between the end of the stirring rod away from the central shaft and the inner wall of the dehydration tank is 2~10cm, the first distance between adjacent heating rods is 0.4~0.8m, the second distance between the stirring rod and adjacent heating rods is 0.2~0.4m, and the reciprocating amplitude of the reciprocating screw is 0.1~0.9 times the second distance.

2. The device according to claim 1, characterized in that, The stirring rod is perpendicularly connected to the central shaft.

3. The device according to claim 2, characterized in that, The middle part of the stirring rod is perpendicularly connected to the central shaft.

4. The device according to any one of claims 1 to 3, characterized in that, The dehydration tank is filled with a rock wool insulation layer.

5. The device according to any one of claims 1 to 3, characterized in that, The motor housing is equipped with multiple heat dissipation vents.

6. A catalytic slurry heavy oil dehydration system, characterized in that, include: Control equipment and catalytic slurry heavy oil dehydration equipment as described in any one of claims 1 to 5; The exhaust pipe and discharge pipe of the catalytic slurry heavy oil dehydration equipment are equipped with solenoid valves. The control device is electrically connected to the dehydrator, the solenoid valve, the heating rod and the motor to control the catalytic slurry heavy oil dehydration equipment to perform dehydration operations on the catalytic slurry heavy oil in the dehydration tank.

7. The system according to claim 6, characterized in that, Also includes: The feeding device is connected to the catalytic oil slurry heavy oil dehydration device through the feed inlet of the dehydrator.

8. The application of a catalytic slurry heavy oil dehydration device as described in any one of claims 1 to 5 in a catalytic cracking process.

9. The application according to claim 8, characterized in that, The reciprocating cycle of the reciprocating screw is 3~10s, the speed of the motor is 50~100r / min, and the heating temperature of the heating rod is 200~300℃.

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