Catalytic cracking slurry pump preheating anticorrosion device

Abstract

The present application relates to oil slurry pump preheating technical field, especially catalytic cracking oil slurry pump preheating anticorrosion device, the present application includes box, the inside fixed communication pipe of box, the one end of communication pipe penetrates the lateral wall of box and with the fixed communication of oil slurry pump's feed port;The one end of communication pipe located inside the box is installed with installation shell, the inner wall of installation shell is slidably connected with the screen for filtering catalyst particles, before the start of oil slurry pump, fan will external air be sucked into and be transported to the inside of communication pipe, air is heated by the heater that is equipped, to make the air that enters into the inside of communication pipe, oil slurry pump and installation shell is hot air, and the heat exchange is carried out with installation shell, communication pipe and oil slurry pump by hot air, to preheating effect has been achieved, after the start of oil slurry pump, the air that fan sucks in enters into the inside of annular installation groove, for moving screen movement.

Description

TECHNICAL FIELD

[0001] The present application relates to oil slurry pump preheating technical field, especially to a catalytic cracking oil slurry pump preheating anticorrosion device. BACKGROUND

[0002] The oil slurry pump is a key important equipment in the catalytic cracking device, mainly used for establishing the circulation of the oil slurry at the bottom of the catalytic cracking fractionating column and providing the oil slurry back to the reaction riser, and whether the oil slurry pump can operate normally directly affects the quality of the target product and the stable operation of the reaction and regeneration system, and further affects the safety, stability and long-period operation of the device.

[0003] The patent with the publication number CN205687864U discloses a catalytic cracking device oil slurry pump preheating system. The problem that the catalyst particles contained in the oil slurry greatly affect the safety production due to the great wear of the preheating line is solved. The bottom of the back to the oil tank is connected with two back to the oil pumps, the two back to the oil pumps are connected with the fractionating column through the back to the oil pump outlet bus, and the bottom of the fractionating column is connected with two oil slurry pumps.

[0004] The oil slurry extracted by the catalytic cracking device oil slurry pump is the high-temperature oil slurry at the bottom of the fractionating column of the catalytic cracking device, the temperature of the oil slurry is 300-375 DEG C, and the oil slurry contains catalyst particles. Since the temperature of the oil slurry is high, when the high-temperature oil slurry enters the low-temperature pump body, the pump body is cracked or the internal components are damaged due to the large difference between the cold and hot temperatures, therefore, the oil slurry pump needs to be preheated before starting, the temperature difference between the oil slurry pump and the high-temperature oil slurry is reduced, the catalyst particles contained in the oil slurry enter the oil slurry pump, which not only causes the oil slurry pump to be blocked, but also causes the anticorrosion coating on the inner wall of the oil slurry pump to be damaged, and further causes the anticorrosion capacity of the oil slurry pump to be reduced. SUMMARY

[0005] The present application aims at solving the problem in the prior art that the pump body is cracked or the internal components are damaged due to the large difference between the cold and hot temperatures when the high-temperature oil slurry enters the low-temperature pump body, and the oil slurry pump needs to be preheated before starting, the temperature difference between the oil slurry pump and the high-temperature oil slurry is reduced, the catalyst particles contained in the oil slurry enter the oil slurry pump, which not only causes the oil slurry pump to be blocked, but also causes the anticorrosion coating on the inner wall of the oil slurry pump to be damaged, and further causes the anticorrosion capacity of the oil slurry pump to be reduced, and proposes a catalytic cracking oil slurry pump preheating anticorrosion device.

[0006] To achieve the above object, the technical scheme adopted by the present application is as follows: a catalytic cracking oil slurry pump preheating anticorrosion device, comprising a box body, a communication pipe is fixed in the box body, one end of the communication pipe penetrates through the side wall of the box body and is fixed in communication with the feed inlet of the oil slurry pump;

[0007] The end of the communication pipe inside the box is provided with a mounting shell, the inner wall of the mounting shell is slidably connected with a screen for filtering catalyst particles, the inside of the mounting shell is provided with an annular mounting groove, and the inside of the annular mounting groove is slidably connected with a ring that moves synchronously with the screen.

[0008] The top of the box is provided with an air inlet assembly, which is used to introduce hot air into the inside of the communication pipe when the slurry pump is not started, the hot air enters the inside of the communication pipe, the mounting shell and the slurry pump, and heat exchange is performed on the communication pipe, the mounting shell and the slurry pump, and after the slurry pump is started, the air inlet assembly introduces air into the inside of the annular mounting groove, and the screen is moved by the increase of air pressure in the inside of the annular mounting groove.

[0009] In further embodiments, the air inlet assembly includes a fan fixedly connected to the top of the box, an air inlet pipe fixedly communicated with the air inlet of the fan, an air outlet pipe fixedly communicated with the air outlet of the fan, the end of the air outlet pipe away from the fan penetrating through the top of the box and being communicated with a reversing valve fixedly connected to the inner top wall of the box.

[0010] The bottom of the reversing valve is fixedly communicated with a first connecting pipe, the bottom of the first connecting pipe is communicated with the inside of the communication pipe, a first one-way valve is fixedly installed in the inside of the first connecting pipe, a heater is fixedly installed on the top of the box, the heater is used for heating the air in the inside of the air inlet pipe, and the heater is fixedly sleeved on the outside of the air inlet pipe.

[0011] In further embodiments, the mounting shell is fixed to the outer wall of the communication pipe, the end of the mounting shell away from the communication pipe is fixedly provided with a feeding pipe penetrating through the side wall of the box, and a second one-way valve is fixedly installed in the inside of the feeding pipe.

[0012] In further embodiments, a plurality of connecting rods are fixedly arranged on one side of the screen, the ends of the plurality of connecting rods away from the screen penetrate through the inner wall of the mounting shell and enter the inside of the annular mounting groove, the ends of the plurality of connecting rods inside the annular mounting groove are jointly fixed with a ring, the ring is slidably connected with the annular mounting groove, and an elastic member for driving the ring to reset is installed on one side of the ring.

[0013] In further embodiments, the elastic member includes a plurality of round rods fixedly arranged in the inside of the annular mounting groove, the plurality of round rods penetrate through the ring and are slidably connected with the ring, a first spring is sleeved on the outside of each of the plurality of round rods, one end of the first spring abuts against the inner wall of the annular mounting groove, and the other end of the first spring abuts against the side wall of the ring.

[0014] In further embodiments, the reversing valve is fixedly communicated with a second connecting pipe on one side, and the end of the second connecting pipe away from the reversing valve is fixedly communicated with the inside of the annular mounting groove.

[0015] The side of the annular mounting groove is provided with an exhaust hole, and the exhaust hole is fixedly communicated with an exhaust pipe, and the exhaust pipe is fixedly communicated with the first pressure relief valve.

[0016] In a further embodiment, the installation shell is provided with a discharge port on one side close to the feed pipe, the discharge port is fixedly communicated with a discharge pipe, and the discharge pipe is fixedly communicated with a collecting box at an end away from the installation shell.

[0017] In a further embodiment, the outlet end of the first pressure relief valve is fixedly communicated with an outlet pipe, the end connected with the oil slurry pump is provided with a groove, an air bag is installed in the groove, the outlet pipe is fixedly communicated with the air bag, and a second pressure relief valve is fixedly installed on one side of the air bag.

[0018] In a further embodiment, the inside of the communication pipe is fixedly provided with a mounting bracket, the mounting bracket is rotatably connected with a hollow rod, the outer wall of the hollow rod is fixedly provided with a fan blade, the inside of the hollow rod is slidably connected with a rotating rod, one end of the rotating rod penetrates through the screen and is fixedly provided with a cleaning rod, and the rotating rod is rotatably connected with the screen.

[0019] In a further embodiment, the side close to the communication pipe of the screen is fixedly provided with a mounting ring, the mounting ring is rotatably connected with the rotating rod, the outer wall of the mounting ring is fixedly communicated with a connecting pipeline, and the other end of the connecting pipeline is fixedly communicated with the outlet pipe after penetrating through the side wall of the installation shell.

[0020] The inside of the cleaning rod is provided with a sliding groove, a sliding rod is slidably inserted into the end of the cleaning rod, a second spring is fixedly arranged in the inside of the sliding groove, the other end of the second spring is fixedly connected with the sliding rod, the inside of the rotating rod is provided with a communication groove, and the communication groove is communicated with the sliding groove.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] 1、The present application is provided with an air inlet assembly, before the oil slurry pump is started, the fan draws external air into the inside of the communication pipe and delivers it, the heater is arranged to heat the air, so that the air entering the inside of the communication pipe, the oil slurry pump and the installation shell is hot air, and heat exchange is carried out between the hot air and the installation shell, the communication pipe and the oil slurry pump, thereby playing a preheating role, after the oil slurry pump is started, the air drawn by the fan enters the inside of the annular mounting groove through the reversing valve, and is used to push the screen to move.

[0023] 2、The present application is provided with a screen, which can block the catalyst particles in the oil slurry, the blocked catalyst particles are deposited at the bottom of the installation shell under the action of gravity, and after the air pressure in the annular mounting groove is increased, the screen is pushed to move towards the direction from the oil slurry pump to the tank body, so that the catalyst particles deposited at the bottom of the installation shell are pushed into the collecting box.

[0024] 3、The present application is through the setting of the cleaning rod, the flow of oil slurry drives the fan blade rotation, the fan blade rotation can drive the cleaning rod rotation, the screen is cleaned, the catalyst particle is reduced to the screen blockage, the air flow of the first pressure relief valve is discharged, the air pressure in the chute is increased, thereby the slide rod is pushed out the cleaning rod, the cleaning area of the screen is increased. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the whole structure schematic diagram of the present application;

[0026] Figure 2 It is the internal structure schematic diagram of the box of the present application;

[0027] Figure 3 It is the structure of the present application Figure 2 Enlarged view of structure at A;

[0028] Figure 4 It is the internal structure section view of the box of the present application;

[0029] Figure 5 It is the structure of the present application Figure 4 Enlarged view of structure at B;

[0030] Figure 6 It is the structure of the present application Figure 4 Enlarged view of structure at C;

[0031] Figure 7 It is the structure of the present application Figure 6 Enlarged view of structure at D;

[0032] Figure 8 It is the structure section view of the rotating rod of the present application;

[0033] Figure 9 It is the structure of the present application Figure 8 Enlarged view of structure at E;

[0034] Figure 10 It is the structure section view of the cleaning rod of the present application.

[0035] In the figure: 1, box; 2, communication pipe; 3, mounting shell; 4, screen; 5, annular mounting groove; 6, circular ring; 7, fan; 8, air inlet pipe; 9, reversing valve; 10, first connecting pipe; 11, first check valve; 12, heater; 13, feed pipe; 14, second check valve; 15, connecting rod; 16, round rod; 17, first spring; 18, second connecting pipe; 19, first pressure relief valve; 20, discharge pipe; 21, collection box; 22, air outlet pipe; 23, air bag; 24, mounting bracket; 25, hollow rod; 26, fan blade; 27, rotating rod; 28, cleaning rod; 29, mounting ring; 30, connecting pipeline; 31, sliding rod; 32, second spring; 33, communication groove; 34, through hole; 35, second pressure relief valve. DETAILED DESCRIPTION

[0036] The following description is used to disclose the present application so that those skilled in the art can implement the present application. The preferred embodiments in the following description are only as examples, and other obvious modifications can be conceived by those skilled in the art.

[0037] As Figures 1 to 10 A catalytic cracking slurry pump preheating corrosion prevention device is shown, which comprises a box 1, a communication pipe 2 is fixed inside the box 1, one end of the communication pipe 2 penetrates through the side wall of the box 1 and is fixed in communication with the feed inlet of the slurry pump;

[0038] One end of the communication pipe 2 located inside the box 1 is provided with a mounting shell 3, a screen 4 for filtering catalyst particles is slidably connected to the inner wall of the mounting shell 3, an annular mounting groove 5 is formed in the inner part of the mounting shell 3, and a circular ring 6 that moves synchronously with the screen 4 is slidably connected to the inside of the annular mounting groove 5.

[0039] An air inlet assembly is mounted on the top of the box 1, which is used to introduce hot air into the inside of the communication pipe 2 when the slurry pump is not started, the hot air enters the inside of the slurry pump and the mounting shell 3 along the communication pipe 2, and heat exchange is carried out between the communication pipe 2, the mounting shell 3 and the slurry pump, after the slurry pump is started, the air inlet assembly introduces air into the inside of the annular mounting groove 5, and the screen 4 is moved by the increase of air pressure in the inside of the annular mounting groove 5.

[0040] In the specific implementation process, a support seat is further included, the support seat is fixedly installed with the slurry pump on the top, the support seat is fixedly installed with a lifting base on the top, the lifting base is fixedly provided with the box 1 on the top, a box door is hingedly connected to one side of the box 1, and a first pressure relief valve 19 is fixedly installed on one side of the annular mounting groove 5.

[0041] It should be noted that the lifting base is a hydraulic lifting platform, which is prior art and is only used for lifting and adjusting the box 1.

[0042] Specifically, since the temperature of the oil slurry is high, when the high-temperature oil slurry enters the low-temperature pump body, a large temperature difference between the cold and hot temperatures will cause the pump body to crack or the internal components to be damaged due to thermal expansion, so the oil slurry pump needs to be preheated before starting to reduce the temperature difference between the oil slurry pump and the high-temperature oil slurry. The catalyst particles contained in the oil slurry entering the oil slurry pump will not only cause the oil slurry pump to be blocked, but also cause the corrosion-resistant coating on the inner wall of the oil slurry pump to be damaged, thereby reducing the corrosion resistance of the oil slurry pump.

[0043] This embodiment of the present application can solve the above problems, and the specific implementation is as follows. First, before the oil slurry pump starts, the staff starts the air inlet assembly to suck air from the outside into the air inlet assembly, heats the air through the air inlet assembly, and then delivers it into the inside of the communication pipe 2. After the hot air flow enters the inside of the communication pipe 2, it enters the inside of the mounting shell 3 and the oil slurry pump from both ends of the communication pipe 2, respectively, to exchange heat with the inside of the communication pipe 2, the mounting shell 3 and the oil slurry pump, thereby increasing the temperature of the communication pipe 2, the mounting shell 3 and the oil slurry pump. Through heat exchange between hot air and the oil slurry pump, the temperature difference between the oil slurry pump and the high-temperature oil slurry is reduced, thereby preventing the pump body from cracking due to a large temperature difference.

[0044] After the oil slurry pump starts, the high-temperature oil slurry enters the inside of the mounting shell 3, the communication pipe 2 and the oil slurry pump under the action of the power of the oil slurry pump. In the process of flowing, the high-temperature oil slurry impacting on the screen 4 can drive the screen 4 to move in the direction from the box 1 to the oil slurry pump. The air inlet assembly stops air inlet into the inside of the communication pipe 2 and starts to fill air into the inside of the annular mounting groove 5. The air pressure in the inside of the annular mounting groove 5 rises, and the high-pressure gas drives the circular ring 6 to move in the direction from the oil slurry pump to the box 1. The circular ring 6 drives the screen 4 moving synchronously.

[0045] After the air pressure in the inside of the annular mounting groove 5 reaches a set value, the first pressure relief valve 19 is opened to reduce the air pressure in the inside of the annular mounting groove 5. The screen 4 is driven to move again by the flowing high-temperature oil slurry. On the one hand, the screen 4 can block the catalyst particles in the oil slurry to prevent the catalyst particles from entering the oil slurry pump to scratch the inner wall of the oil slurry pump, thereby protecting the corrosion-resistant coating on the inner wall of the oil slurry pump from being damaged by the catalyst particles. On the other hand, the reciprocating movement of the screen 4 can help to shake off the catalyst particles blocked on the screen 4.

[0046] In the further implementation process, the air inlet assembly includes a fan 7 fixedly connected to the top of the box 1. The air inlet of the fan 7 is fixedly communicated with an air inlet pipe 8. The air outlet of the fan 7 is fixedly communicated with an air outlet pipe. The end of the air outlet pipe away from the fan 7 penetrates through the top of the box 1 and is communicated with a reversing valve 9 fixedly connected to the inner top wall of the box 1.

[0047] The bottom of the reversing valve 9 is fixedly communicated with a first connecting pipe 10, the bottom of the first connecting pipe 10 is communicated with the inside of the communicating pipe 2, the inside of the first connecting pipe 10 is fixedly installed with a first one-way valve 11, the top of the box body 1 is fixedly installed with a heater 12, the heater 12 is used for heating the air in the inside of the air inlet pipe 8, and the heater 12 is fixedly sleeved outside the air inlet pipe 8.

[0048] Specifically, when the oil slurry pump is not started, the staff starts the fan 7, under the action of the fan 7, the external air enters the communicating pipe 2 in the air inlet pipe 8, the fan 7, the air outlet pipe, the reversing valve 9 and the first connecting pipe 10 in turn, the air temperature rises to become hot air after being heated in the air inlet pipe 8 by the heater 12, the hot air enters the communicating pipe 2 and enters the installation shell 3 and the oil slurry pump along the two ends of the communicating pipe 2, heat exchange is carried out in the inside of the installation shell 3, the communicating pipe 2 and the oil slurry pump, the preheating effect is achieved, so that the high-temperature oil slurry entering the inside of the installation shell 3, the connecting pipe and the oil slurry pump will not cause the expansion and cracking of the parts due to the high temperature difference, and the first one-way valve 11 can prevent the oil slurry in the inside of the communicating pipe 2 from entering the first connecting pipe 10.

[0049] The heater 12 heats the air inlet pipe 8, and the air in the external atmosphere is heated by the air inlet pipe 8 after entering the air inlet pipe 8, so that the air temperature is increased.

[0050] In further implementation process, the installation shell 3 is fixed on the outer wall of the communicating pipe 2, the installation shell 3 is fixed with a feeding pipe 13 away from the communicating pipe 2, the feeding pipe 13 penetrates the side wall of the box body 1, and the second one-way valve 14 is fixedly installed in the inside of the feeding pipe 13.

[0051] In the specific implementation process, a plurality of through holes 34 are formed in the outside of the installation shell 3, and all the through holes 34 are communicated with the inside of the annular installation groove 5.

[0052] Specifically, one end of the feeding pipe 13 is communicated with the bottom of the catalytic cracking device through a pipeline, after the staff starts the oil slurry pump, the high-temperature oil slurry enters the feeding pipe 13, the installation shell 3, the communicating pipe 2 and the oil slurry pump in turn under the action of the oil slurry pump.

[0053] In the process of introducing hot air into the inside of the communicating pipe 2 for heat exchange, the second one-way valve 14 can prevent the hot air from being discharged from the feeding pipe 13.

[0054] In the process of the oil slurry impacting the screen 4 and driving the screen 4 to move, the screen 4 drives the circular ring 6 to move synchronously, and after the circular ring 6 moves inside the annular mounting groove 5, the circular ring 6 divides the annular mounting groove 5 into two chambers. The movement of the circular ring 6 causes a negative pressure to be generated inside the chamber close to the screen 4, and the air outside is sucked into the chamber close to the screen 4 through the through hole 34, thereby avoiding the negative pressure inside the chamber close to the screen 4 from hindering the movement of the screen 4.

[0055] In further implementation, a plurality of connecting rods 15 are fixed circumferentially on one side of the screen 4, and the ends of the plurality of connecting rods 15 away from the screen 4 penetrate the inner wall of the mounting shell 3 and enter the inside of the annular mounting groove 5. The ends of the plurality of connecting rods 15 inside the annular mounting groove 5 are fixed together with the circular ring 6, and the circular ring 6 is in sliding connection with the annular mounting groove 5. An elastic member for driving the circular ring 6 to reset is mounted on one side of the circular ring 6.

[0056] Specifically, when the high-temperature oil slurry flows inside the mounting shell 3, the oil slurry impacts the screen 4 during the flow process, causing the screen 4 to move towards the direction from the tank 1 to the oil slurry pump. The movement of the screen 4 drives the plurality of connecting rods 15 to move, and the plurality of connecting rods 15 collectively drive the circular ring 6 to move. The arrangement of the plurality of connecting rods 15 also prevents the screen 4 from tilting under the impact of the oil slurry. The arrangement of the screen 4 can block the catalyst particles in the oil slurry during the flow process of the oil slurry, preventing the catalyst particles from entering the oil slurry pump and damaging the anticorrosive coating inside the oil slurry pump.

[0057] After the oil slurry pump is started, the flow direction of the air is changed by the reversing valve 9, causing the air drawn in by the fan 7 to flow into the inside of the annular mounting groove 5. After the air pressure inside the annular mounting groove 5 rises, the high-pressure air drives the circular ring 6 to move towards the direction from the oil slurry pump to the tank 1. The circular ring 6 collectively drives the plurality of connecting rods 15 to move, and the plurality of connecting rods 15 drive the screen 4 to move, causing the screen 4 to move towards the direction from the oil slurry pump to the tank 1. After the air pressure inside the annular mounting groove 5 is greater than a set value, the first pressure relief valve 19 opens, causing the air pressure inside the annular mounting groove 5 to decrease. After the air pressure inside the annular mounting groove 5 decreases, the screen 4 moves again towards the direction from the tank 1 to the oil slurry pump under the impact of the oil slurry. The reciprocating movement of the screen 4 is conducive to shaking off the catalyst particles clogging the mesh of the screen 4.

[0058] In further implementation, the elastic member includes a plurality of round rods 16 fixed circumferentially inside the annular mounting groove 5. The plurality of round rods 16 are in sliding connection with the circular ring 6 penetrating the circular ring 6. The outside of each of the plurality of round rods 16 is sleeved with a first spring 17. One end of the first spring 17 is in abutment with the inner wall of the annular mounting groove 5, and the other end of the first spring 17 is in abutment with the side wall of the circular ring 6.

[0059] Specifically, by the first spring 17, on the one hand, the movement of the ring 6 plays a buffering support role, after the oil slurry impacts on the screen 4, it will drive the screen 4 to move, the screen 4 drives the synchronous movement of the ring 6, the ring 6 moves in the annular mounting groove 5 to compress the first spring 17, which is beneficial to prevent the impact of the ring 6 on the inner wall of the annular mounting groove 5, after the oil slurry is extracted, the screen 4 is restored to the original position by the elastic force of the first spring 17, the circular rod 16 can support the first spring 17 to prevent the first spring 17 from bending in the compressed state.

[0060] On the other hand, in the process of oil slurry flowing, the impact force of oil slurry on the screen 4 is not constant, and the contact area between the oil slurry and the screen 4 increases due to the catalyst particles in the oil slurry blocking the screen 4, so that the impact force of the oil slurry on the screen 4 will fluctuate, and the first spring 17 will make the screen 4 vibrate under the action of the elastic force, thereby facilitating the removal of the catalyst particles blocked on the screen 4.

[0061] In further implementation, one side of the reversing valve 9 is fixedly communicated with a second connecting pipe 18, and the other end of the second connecting pipe 18 away from the reversing valve 9 is fixedly communicated with the inside of the annular mounting groove 5.

[0062] The annular mounting groove 5 is provided with an exhaust hole on one side, the exhaust hole is fixedly communicated with an exhaust pipe, and the exhaust pipe is fixedly communicated with the first pressure relief valve 19.

[0063] Specifically, after the oil slurry pump is started, the reversing valve 9 changes the flow direction of the air, and the air drawn in by the fan 7 enters the inside of the annular mounting groove 5 through the second connecting pipe 18, so that the air pressure in the annular mounting groove 5 increases, and the air pressure acts on one side of the ring 6 to push the ring 6 to move, and after the thrust generated by the increasing air pressure overcomes the impact force of the oil slurry flow on the screen 4, the ring 6 drives the screen 4 to move through the connecting rod 15.

[0064] In further implementation, the installation shell 3 is provided with a discharge port on one side close to the feed pipe 13, the discharge port is fixedly communicated with a discharge pipe 20, and the other end of the discharge pipe 20 away from the installation shell 3 is fixedly communicated with a collection box 21.

[0065] In specific implementation, the collection box 21 is installed in the inside of the box body 1, and the inlet of the collection box 21 is fixedly communicated with the outlet of the discharge pipe 20.

[0066] Specifically, in the process of oil slurry flowing in the inside of the installation shell 3, the screen 4 can intercept the catalyst particles in the oil slurry, and as the number of intercepted catalyst particles increases, the flow of the oil slurry and the filtering speed of the screen 4 are affected.

[0067] Under the action of gravity, the catalyst particles intercepted by the screen 4 will deposit at the bottom of the mounting shell 3. During the movement of the screen 4 towards the direction of the slurry pump to the tank 1, the catalyst particles deposited at the bottom of the mounting shell 3 will enter into the discharge port under the pushing of the screen 4, and then enter into the inside of the collecting tank 21 along the discharge port, thereby playing a role of recycling the intercepted catalyst and preventing the catalyst particles from accumulating in the inside of the mounting shell 3 to affect the filtering effect of the screen 4.

[0068] In further implementation process, the gas outlet end of the first pressure relief valve 19 is fixedly communicated with a gas outlet pipe 22, the end of the communication pipe 2 connected with the slurry pump is provided with a recess, and the inside of the recess is provided with an air bag 23. The air bag 23 is fixedly communicated with the gas outlet pipe 22, and one side of the air bag 23 is fixedly provided with a second pressure relief valve 35.

[0069] In specific implementation process, the end of the communication pipe 2 connected with the slurry pump is connected by bolts, and a sealing gasket is arranged between the end of the communication pipe 2 connected with the slurry pump.

[0070] Specifically, after the air pressure in the annular mounting groove 5 is greater than the set value, the first pressure relief valve 19 is opened to discharge the air in the annular mounting groove 5, so that the air pressure in the annular mounting groove 5 is reduced. The air flow discharged from the first pressure relief valve 19 enters the inside of the air bag 23 along the gas outlet pipe 22, the air pressure in the inside of the air bag 23 is increased to make the air bag 23 expand, which is beneficial to improve the sealing between the communication pipe 2 and the slurry pump.

[0071] After the air pressure in the inside of the air bag 23 is increased to a specified value, the second pressure relief valve 35 is opened to discharge the air, so that the air pressure in the inside of the air bag 23 is maintained at the specified value. The air discharged from the second pressure relief valve 35 is discharged near the connection between the communication pipe 2 and the slurry pump, which is beneficial to accelerate the air flow, thereby being beneficial to heat dissipation of the connection between the communication pipe 2 and the slurry pump.

[0072] It should be noted that the specified value is less than the set value, and the air pressure in the inside of the air bag 23 and the gas outlet pipe 22 will not affect the rapid pressure relief of the first pressure relief valve 19.

[0073] In further implementation process, the inside of the communication pipe 2 is fixedly provided with a mounting frame 24, the mounting frame 24 is rotatably connected with a hollow rod 25, the outer wall of a rotating rod 27 is fixedly provided with a fan blade 26, the inside of the hollow rod 25 is slidably connected with the rotating rod 27, one end of the rotating rod 27 penetrates through the screen 4 and is fixedly provided with a cleaning rod 28, and the rotating rod 27 is rotatably connected with the screen 4.

[0074] In specific implementation process, the inner wall of the hollow rod 25 is provided with a sliding groove, the outer wall of the rotating rod 27 is fixedly provided with a sliding block, and the sliding groove is slidably connected with the sliding block.

[0075] Specifically, during the process of the oil slurry flowing in the inside of the communication pipe 2, the flowing oil slurry drives the fan blade 26 to rotate, the fan blade 26 drives the hollow rod 25 to rotate, the hollow rod 25 drives the rotating rod 27 to rotate, and the rotating rod 27 drives the cleaning rod 28 to rotate to clean the screen 4, thereby facilitating the reduction of the catalyst particles blocked on the screen 4.

[0076] In further implementation, the screen 4 is fixed with a mounting ring 29 on the side close to the communication pipe 2, the mounting ring 29 is rotationally connected with the rotating rod 27, a connecting pipeline 30 is fixedly communicated on the outer wall of the mounting ring 29, and the other end of the connecting pipeline 30 is fixedly communicated with the air outlet pipe 22 after penetrating through the side wall of the mounting shell 3.

[0077] The inside of the cleaning rod 28 is provided with a sliding groove, the end of the cleaning rod 28 is slidingly inserted with a sliding rod 31, the inside of the sliding groove is fixedly provided with a second spring 32, the other end of the second spring 32 is fixedly connected with the sliding rod 31, the inside of the rotating rod 27 is provided with a communication groove 33, the communication groove 33 is communicated with the sliding groove, and the communication groove 33 is communicated with the inside of the mounting ring 29.

[0078] In specific implementation, the inside of the mounting ring 29 is provided with an annular groove, one end of the connecting pipeline 30 is fixedly communicated with the inside of the annular groove, and the outer wall of the rotating rod 27 is provided with an opening, the communication groove 33 is communicated with the annular groove through the opening.

[0079] It should be noted that the material of the connecting pipeline 30 is a high-temperature-resistant hose.

[0080] Specifically, after the first pressure relief valve 19 releases the high-pressure gas in the annular mounting groove 5, the screen 4 is moved under the impact of the oil slurry towards the direction from the box body 1 to the oil slurry pump, in the process of moving, the gas released by the first pressure relief valve 19 enters the air outlet pipe 22, part of the gas in the air outlet pipe 22 enters the inside of the sliding groove in turn through the connecting pipeline 30, the annular groove and the communication groove 33, and pushes the sliding rod 31 to the outside of the cleaning rod 28 with the increase of the air pressure, thereby being capable of cleaning the side of the screen 4 and increasing the cleaning area of the screen 4. When the air pressure in the air bag 23 is relatively large, the second pressure relief valve 35 is opened to exhaust, because the connecting pipeline, the air outlet pipe 22 and the air bag 23 are communicated, thereby reducing the air pressure in the sliding groove, under the elastic force of the second spring 32, the sliding rod 31 is retracted into the inside of the cleaning rod 28, thereby avoiding hindering the movement of the screen 4 towards the direction from the oil slurry pump to the box body 1, so that the screen 4 can be moved to be attached to the inner wall of the side wall and the mounting shell 3, thereby facilitating the screen 4 to push the catalyst particles deposited at the bottom of the mounting shell 3 into the discharge pipe 20.

[0081] Working principle of the present application:

[0082] In use, first, the staff adjusts the lifting base, so that the communication pipe 2 is aligned with the feed inlet of the oil slurry pump, then the bolt is used to fixedly connect the communication pipe 2, the sealing ring and the oil slurry pump, then the fan 7 is started, the fan 7 draws the external air into the inside of the communication pipe 2, the heater 12 is arranged to heat the air, so that the air entering the inside of the communication pipe 2, the oil slurry pump and the installation shell 3 is hot air, and the hot air exchanges heat with the installation shell 3, the communication pipe 2 and the oil slurry pump, thereby playing a preheating role, which is beneficial to prevent the case that the high-temperature oil slurry causes the internal expansion of the oil slurry pump when entering.

[0083] After the oil slurry pump is started, the high-temperature oil slurry at the bottom of the catalytic cracking device fractionating tower is drawn out by the oil slurry pump, and the oil slurry enters the feed pipe 13, the installation shell 3, the communication pipe 2 and the oil slurry pump in turn, in the process of conveying the oil slurry by the oil slurry pump, the sieve net 4 arranged can block the catalyst particles in the oil slurry, the blocked catalyst particles are deposited at the bottom of the installation shell 3 under the action of gravity, and the oil slurry impacts on the sieve net 4 to push the sieve net 4 to move, through the setting of the reversing valve 9, at this time, the heater 12 is closed, the air drawn in by the fan 7 is normal-temperature air, which is helpful to heat dissipation of the installation shell 3, the air enters the inside of the annular installation groove 5 from the second connecting pipe 18, and after the air pressure in the inside of the annular installation groove 5 is increased, the sieve net 4 is pushed to move towards the direction of the oil slurry pump to the box body 1, and the catalyst particles deposited at the bottom of the installation shell 3 are pushed into the collecting box 21.

[0084] The sieve net 4 moves towards the direction of the oil slurry pump to the box body 1, and the circular ring 6 is synchronously moved, the circular ring 6 compresses the first spring 17, the first spring 17 plays a buffering support role, the impact force of the oil slurry impacting on the sieve net 4 will change due to the catalyst particles blocking the mesh holes of the sieve net 4, after the impact force is floated, the first spring 17 pushes the sieve net 4 to slightly shake, which is beneficial to shake off the catalyst particles blocked in the mesh holes of the sieve net 4.

[0085] In the process of oil slurry pump conveying oil slurry, the flow of oil slurry drives the fan 26 to rotate, and the rotation of the fan 26 can drive the cleaning rod 28 to rotate, and the screen 4 is cleaned, further reducing the blockage of the screen 4, and the first spring 17 promotes the vibration of the screen 4 to clean the catalyst particles blocked on the screen 4. After the air pressure inside the annular mounting groove 5 reaches the set value, the first pressure relief valve 19 opens to release the airflow, the air pressure inside the annular mounting groove 5 decreases, and the screen 4 moves towards the direction of the oil slurry pump from the tank 1 under the impact of the oil slurry. The airflow discharged by the first pressure relief valve 19 increases the air pressure inside the chute, thereby pushing the slide rod 31 to extend the cleaning rod 28, increasing the cleaning area of the screen 4, and the airflow discharged by the first pressure relief valve 19 is also used to inflate the air bag 23. After the air bag 23 is inflated, the sealing performance of the gasket is improved. When the air pressure inside the air bag 23 is too high, the second pressure relief valve 35 opens to release the air, so that the air pressure inside the air bag 23 is maintained at a specified value. The airflow discharged by the second pressure relief valve 35 can increase the flow of external air, thereby facilitating heat dissipation at the connection between the connecting pipe 2 and the oil slurry pump.

[0086] After the airflow enters the inside of the annular mounting groove 5, it will push the screen 4 to move inside the mounting shell 3 towards the direction of the oil slurry pump from the tank 1. Through the setting of the first pressure relief valve 19, after the airflow is discharged from the first pressure relief valve 19, the screen 4 moves under the impact of the oil slurry, so that the screen 4 moves back and forth. After the airflow flows through the first pressure relief valve 19, it enters the air outlet pipe 22. Part of the airflow in the air outlet pipe 22 enters the chute through the connecting pipe 30, thereby pushing the slide rod 31 to extend the cleaning rod 28, achieving the purpose of increasing the cleaning area of the screen 4. Subsequently, the airflow in the air outlet pipe 22 enters the air bag 23, increasing the air pressure inside the air bag 23. When the pressure of the air bag 23 is greater than a specified value, the second pressure relief valve 35 opens, and then discharges the airflow.

[0087] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A catalytic cracking oil slurry pump preheating and anti-corrosion device, comprising a housing (1), characterized in that: A connecting pipe (2) is fixed inside the box (1), one end of the connecting pipe (2) passes through the side wall of the box (1) and is fixedly connected to the feed port of the slurry pump; A mounting shell (3) is installed at one end of the connecting pipe (2) located inside the box (1); a screen (4) for filtering catalyst particles is slidably connected to the inner wall of the mounting shell (3); an annular mounting groove (5) is provided inside the mounting shell (3); a circular ring (6) that moves synchronously with the screen (4) is slidably connected inside the annular mounting groove (5); An air intake assembly is installed on the top of the box body (1). When the oil slurry pump is not started, the air intake assembly is used to introduce hot air into the interior of the connecting pipe (2). The hot air enters the interior of the oil slurry pump and the mounting shell (3) along the connecting pipe (2), and performs heat exchange between the connecting pipe (2), the mounting shell (3) and the oil slurry pump. After the oil slurry pump is started, the air intake assembly introduces air into the interior of the annular mounting groove (5), and the screen (4) is driven to move by the increase in air pressure inside the annular mounting groove (5).

2. A catalytic cracking slurry pump preheating and anti-corrosion device according to claim 1, characterized in that: The air intake assembly comprises a fan (7), the fan (7) is fixedly connected to the top of the box (1), the air inlet of the fan (7) is fixedly connected to an air inlet pipe (8), the air outlet of the fan (7) is fixedly connected to an air outlet pipe, the end of the air outlet pipe away from the fan (7) passes through the top of the box (1) and is connected to a reversing valve (9), and the reversing valve (9) is fixedly connected to the inner top wall plate of the box (1); The bottom of the reversing valve (9) is fixedly connected to a first connecting pipe (10), the bottom of the first connecting pipe (10) is connected to the inside of the connecting pipe (2), a first one-way valve (11) is fixedly installed inside the first connecting pipe (10), and a heater (12) is fixedly installed on the top of the box (1), the heater (12) is used to heat the air inside the air inlet pipe (8), and the heater (12) is fixedly sleeved on the outside of the air inlet pipe (8).

3. A catalytic cracking slurry pump preheating and anti-corrosion device according to claim 2, characterized in that: The mounting shell (3) is fixed on the outer wall of the connecting pipe (2); a feed pipe (13) is fixed to one end of the mounting shell (3) away from the connecting pipe (2); the feed pipe (13) passes through the side wall of the box body (1); and a second one-way valve (14) is fixedly installed inside the feed pipe (13).

4. A catalytic cracking slurry pump preheating and anti-corrosion device according to claim 3, characterized in that: A plurality of connecting rods (15) are fixed in a circumferential array on one side of the screen (4), and the ends of the plurality of connecting rods (15) away from the screen (4) all penetrate the inner wall of the mounting shell (3) and enter the interior of the annular mounting groove (5). A circular ring (6) is fixed to one end of the plurality of connecting rods (15) located inside the annular mounting groove (5), and the circular ring (6) is slidably connected to the annular mounting groove (5). An elastic member for driving the circular ring (6) to reset is installed on one side of the circular ring (6).

5. A catalytic cracking slurry pump preheating and anti-corrosion device according to claim 4, characterized in that: The elastic member comprises a plurality of round rods (16), which are fixed in a circumferential array inside the annular mounting groove (5), and the plurality of round rods (16) are all connected to the circular ring (6) and are slidably connected to the circular ring (6). The outsides of the plurality of round rods (16) are all sleeved with a first spring (17), one end of the first spring (17) contacts the inner wall of the annular mounting groove (5), and the other end of the first spring (17) contacts the side wall of the circular ring (6).

6. A catalytic cracking slurry pump preheating and anti-corrosion device according to claim 5, characterized in that: One side of the reversing valve (9) is fixedly connected to a second connecting pipe (18), and one end of the second connecting pipe (18) away from the reversing valve (9) is fixedly connected to the interior of the annular mounting groove (5); An exhaust hole is provided on one side of the annular mounting groove (5), and the exhaust hole is fixedly connected to an exhaust pipe, and the exhaust pipe is fixedly connected to the first pressure relief valve (19).

7. A catalytic cracking slurry pump preheating and anti-corrosion device according to claim 6, characterized in that: A discharge port is provided on one side of the mounting shell (3) close to the feed pipe (13), the discharge port is fixedly connected to a discharge pipe (20), and an end of the discharge pipe (20) away from the mounting shell (3) is fixedly connected to a collection box (21).

8. A catalytic cracking slurry pump preheating and anti-corrosion device according to claim 7, characterized in that: The outlet end of the first pressure relief valve (19) is fixedly connected to an outlet pipe (22); the end of the connecting pipe (2) connected to the slurry pump is provided with a groove; an air bag (23) is installed inside the groove; the outlet pipe (22) is fixedly connected to the air bag (23); and a second pressure relief valve (35) is fixedly installed on one side of the air bag (23).

9. A catalytic cracking slurry pump preheating and anti-corrosion device according to claim 8, characterized in that: A mounting frame (24) is fixed inside the communicating pipe (2), a hollow rod (25) is rotatably connected to the mounting frame (24), a fan blade (26) is fixed on the outer wall of the hollow rod (25), a rotating rod (27) is slidably connected inside the hollow rod (25), one end of the rotating rod (27) passes through the screen (4) and is fixed with a cleaning rod (28), and the rotating rod (27) is rotatably connected to the screen (4).

10. A catalytic cracking slurry pump preheating and anti-corrosion device according to claim 9, characterized in that: A mounting ring (29) is fixed on one side of the screen (4) close to the connecting pipe (2), the mounting ring (29) is rotatably connected to the rotating rod (27), a connecting pipe (30) is fixedly connected to the outer wall of the mounting ring (29), and the other end of the connecting pipe (30) passes through the side wall of the mounting shell (3) and is fixedly connected to the air outlet pipe (22); A sliding groove is provided inside the cleaning rod (28), a sliding rod (31) is slidably inserted at the end of the cleaning rod (28), a second spring (32) is fixed inside the sliding groove, and the other end of the second spring (32) is fixedly connected to the sliding rod (31), and a connecting groove (33) is provided inside the rotating rod (27), and the connecting groove (33) is connected to the sliding groove.

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