Catalytic cracking unit oil slurry pump with backwashing function

Abstract

The present application relates to oil slurry pump technical field, especially a catalytic cracking device oil slurry pump with backwashing function, the present application includes the installation base, the top one end of the installation base is fixedly connected with the oil slurry pump body, the oil inlet end of oil slurry pump body is connected with the front box for filtering, the oil outlet end of oil slurry pump body is connected with the oil outlet conduit.The present application is through the setting of backwashing component, through backwashing component to the front box is carried out reverse flushing, it is favorable to avoid the situation that oil slurry cannot enter into the oil slurry pump body due to the coking matter and solid particles contained in oil slurry solidification, after flushing the front box for a period of time, control backwashing component preheats the oil slurry pump body, avoid the pump body to start the empty condition that appears in the process of starting due to not preheating, can also avoid the coking matter and solid particles solidification due to low temperature and the situation that occurs.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of oil slurry pumps, in particular to a catalytic cracking device oil slurry pump with backwashing function. BACKGROUND

[0002] As an important secondary processing device of crude oil, whether the catalytic cracking device can run for a long period of time has a significant impact on the safe operation of the oil refining enterprise. The oil slurry pump is a key important equipment in the catalytic cracking device, which is mainly used to establish the circulation of the oil slurry at the bottom of the catalytic cracking fractionating column.

[0003] In the patent with publication number CN113048066A, a petroleum refining oil slurry pump is disclosed, which comprises a suction cover, a front wear plate, a pump body, an impeller, a rear wear plate, a pump cover, a bearing box and a pump shaft. The pump body is provided with a suction cover and a pump cover at the front and rear ends respectively, and the front wear plate is press-fitted between the suction cover and the pump body.

[0004] However, the above-mentioned oil slurry pump still has certain defects in use. Since the temperature of the oil slurry is relatively high, the oil slurry pump often needs to be preheated before use. If the oil slurry pump is not preheated, on the one hand, it will cause the oil slurry pump to be empty, and on the other hand, it will also cause the oil slurry pump to vibrate. In addition, since the coking matter and solid particles contained in the oil slurry will solidify at low temperature, if the oil slurry pump is not effectively preheated, the coking matter and solid particles will also solidify due to low temperature. SUMMARY

[0005] The present application aims to solve the problems in the prior art and provides a catalytic cracking device oil slurry pump with backwashing function.

[0006] To achieve the above purpose, the technical scheme adopted by the present application is as follows: a catalytic cracking device oil slurry pump with backwashing function, comprising a mounting base, the top end of the mounting base is fixedly connected with an oil slurry pump body, the oil inlet end of the oil slurry pump body is communicated with a pre-filtering tank for filtering, the oil outlet end of the oil slurry pump body is communicated with an oil outlet conduit, the oil outlet end of the oil slurry pump body is communicated with a backwashing assembly, the backwashing assembly is also used to preheat the oil slurry pump body, an empty slot is formed in the inside of the mounting base, the empty slot is used to recover the washing oil of the backwashing assembly, the oil outlet conduit is placed in the empty slot, and the oil outlet conduit penetrates through the end wall plate of the mounting base away from the oil slurry pump body.

[0007] Preferably, the oil slurry pump body is drivenly connected with a servo motor away from one side of the pre-tank, the servo motor is fixedly connected on the mounting base, the oil slurry pump body is rotatably connected with an impeller, each blade of the impeller is fixedly connected with an arc-shaped repulsion strip, the pre-tank is respectively communicated with an oil inlet pipe and an oil outlet pipe at two ends, the oil inlet pipe is communicated with the oil slurry pipeline, the oil outlet pipe is communicated with the input end of the oil slurry pump body, and the bottom of the oil outlet pipe is further communicated with a preheating water pipe, one end of the preheating water pipe away from the oil outlet pipe is communicated with the air slot.

[0008] Preferably, the backwashing assembly comprises a water tank, the water tank is pre-added with washing oil, the inside of the water tank is provided with a heat-resistant submersible pump, the input end of the heat-resistant submersible pump is communicated with a three-way electromagnetic valve, the output end of the three-way electromagnetic valve is communicated with the input end of the heat-resistant submersible pump, the three-way electromagnetic valve is provided with two input ends, the two input ends of the three-way electromagnetic valve are respectively communicated with the water tank and the air slot, the output end of the heat-resistant submersible pump is communicated with the output end of the oil slurry pump body, the inside of the water tank is provided with a heating plate, and the heating plate is used for increasing the temperature of the washing oil in the water tank and preheating the oil slurry pump body.

[0009] Preferably, the output end of the oil slurry pump body is further communicated with a "U"-shaped oil discharge pipe, one end of the oil discharge pipe away from the oil slurry pump body is communicated with an oil outlet duct, the output end of the heat-resistant submersible pump is communicated with a water inlet pipe, one end of the water inlet pipe away from the heat-resistant submersible pump is communicated on one side of the output end of the oil slurry pump body, and a first electromagnetic valve is arranged at the communicated position, a second electromagnetic valve is arranged at the communicated position of the oil discharge pipe and the output end of the oil slurry pump body, a backflow valve is arranged at the communicated position of the preheating water pipe and the oil outlet pipe, the backflow valve is used for recycling the washing oil into the air slot during the preheating process of the oil slurry pump body, and a plugging valve is arranged at the communicated position of the pre-tank and the oil outlet pipe.

[0010] Preferably, the inside bottom of the pre-tank is provided with a buffer cavity, the inside top of the pre-tank is provided with a buffer groove, one end of the buffer groove close to the oil outlet pipe is fixedly connected with an extension plate, the extension plate is located below the oil outlet pipe, one end of the extension plate away from the oil outlet pipe is fixedly connected with an inclined filter plate at the top, the filter plate is used for filtering the oil slurry drawn in by the oil inlet pipe, a plate valve is arranged between the buffer groove and the buffer cavity, one side of the buffer cavity is provided with a discharge port, a cover is movably arranged in the discharge port, and an air bag is arranged at the abutting position of the cover and the pre-tank.

[0011] Preferably, the inside of the pre-tank is provided with a mounting groove, the mounting groove is located between the buffer groove and the buffer cavity, the bottom of the buffer groove is provided with four discharge inclined surfaces, the discharge inclined surfaces are located at the top of the mounting groove, a rectangular frame-shaped vibration transmission plate is fixedly connected in the mounting groove, a plurality of vibration plates are equidistantly fixedly connected at the top and bottom of the vibration transmission plate, and the top wall plates of the plurality of vibration plates are fixedly connected to the bottom wall plates of the discharge inclined surfaces.

[0012] Preferably, the bottom of the oil slurry pump body is fixedly connected with a support, the support is fixedly connected to the top wall plate of the mounting base, the bottom of the servo motor is fixedly connected with a mounting seat, the mounting seat is also fixedly connected to the top wall plate of the mounting base, a plurality of support columns are fixedly connected in the mounting base, the plurality of support columns are distributed below the two ends of the support and below the center of the mounting seat, and the plurality of support columns are used for supporting the oil slurry pump body and the servo motor.

[0013] Preferably, a connecting plate is fixedly connected between every two adjacent support columns, a Z-shaped connecting rod is fixedly connected to the center of one end of the connecting plate close to the pre-tank, one end of the connecting rod away from the connecting plate penetrates the wall plate of the mounting base and the pre-tank, and the other end of the connecting rod away from the connecting plate is fixedly connected to one end of the vibration transmission plate close to the mounting base.

[0014] Preferably, an elastic push plate is fixedly connected to the connection between the top horizontal end and the vertical end of the connecting rod, and the elastic push plate is located below the communication between the preheating water pipe and the empty slot.

[0015] Preferably, the output shaft of the servo motor is fixedly connected with a pump shaft, the oil slurry pump body is in driving connection with the servo motor through the pump shaft, and the water tank is provided with a filling port at one end of the top, and the top of the filling port is provided with a cover plate.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] Through the setting of the backwashing assembly, the pre-tank is backwashed through the backwashing assembly, which is beneficial to avoid the situation that the oil slurry cannot enter the oil slurry pump body due to the solidification of coking substances and solid particles contained in the oil slurry, and after washing the pre-tank for a period of time, the backwashing assembly is controlled to preheat the oil slurry pump body, so as to avoid the situation that the pump body is started to be empty due to not being preheated during starting, and also to avoid the situation that the coking substances and solid particles are solidified due to low temperature.

[0018] Through the setting of the empty slot, the preheated washing oil is recycled and temporarily stored in the empty slot, the temperature of the washing oil in the empty slot can be raised by using the heat of the oil slurry, which is beneficial to avoid the solidification of coking substances and solid particles due to too low temperature of the washing oil in the subsequent backwashing process. Secondly, the stability of the mounting base can be improved by increasing the weight, and during the working of the oil slurry pump body, a certain vibration will be generated, the washing oil is recycled into the empty slot, and due to the viscosity and flowability of the liquid, the vibration energy can be absorbed, thereby achieving a certain damping effect.

[0019] The present application reduces the probability of coking and solid particles in oil slurry being stuck on the filter plate during the working process of the oil slurry pump body by the inclined arrangement of the filter plate, generates a downward component force by the horizontal impact force, reduces the impact of coking and solid particles on the filter plate, and also reduces the probability of coking and solid particles being stuck on the filter plate, which is beneficial to avoid the situation of coking and solid particles in the oil slurry being stuck on the filter plate. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0021] Figure 2 It is a schematic diagram of the overall structure of the present application from another perspective;

[0022] Figure 3 It is a schematic diagram of the structure of the oil slurry pump body of the present application;

[0023] Figure 4 It is a schematic diagram of the structure of the mounting base of the present application;

[0024] Figure 5 It is a schematic diagram of the structure of the mounting base of the present application; Figure 4 It is an enlarged schematic diagram of the structure of part A shown in the figure;

[0025] Figure 6 It is a schematic diagram of the structure of the pre-positioned box of the present application;

[0026] Figure 7 It is a schematic diagram of the connecting structure of the connecting rod of the present application;

[0027] Figure 8 It is a schematic diagram of the overall structure of the impeller of the present application.

[0028] In the figure: 1, mounting base; 2, servo motor; 3, oil slurry pump body; 4, oil discharge pipe; 5, pre-positioned box; 6, water tank; 7, water inlet pipe; 8, oil inlet pipe; 9, oil outlet pipe; 10, preheating water pipe; 11, heat-resistant submersible pump; 12, three-way electromagnetic valve; 13, empty groove; 14, support column; 15, impeller; 16, first electromagnetic valve; 17, second electromagnetic valve; 18, filter plate; 19, buffer cavity; 20, vibration transmission plate; 21, plate valve; 22, connecting rod; 23, plugging valve; 24, backflow valve; 25, discharge slope; 26, mounting groove; 27, cover; 28, connecting plate; 29, vibration plate; 30, repulsion strip; 31, oil outlet guide pipe; 32, elastic push plate. DETAILED DESCRIPTION

[0029] 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.

[0030] AsFigures 1 to 8 The oil slurry pump with backwashing function of catalytic cracking device shown comprises a mounting base 1, an oil slurry pump body 3 fixedly connected to one end of the top of the mounting base 1, a front box 5 for filtering communicated with the oil inlet end of the oil slurry pump body 3, an oil outlet conduit 31 communicated with the oil outlet end of the oil slurry pump body 3, a backwashing assembly communicated with the oil outlet end of the oil slurry pump body 3, the backwashing assembly also used for preheating the oil slurry pump body 3, an empty groove 13 formed in the mounting base 1, the empty groove 13 used for recycling the washing oil of the backwashing assembly, the oil outlet conduit 31 placed in the empty groove 13 and the oil outlet conduit 31 penetrating through one end wall of the mounting base 1 away from the oil slurry pump body 3. The washing oil used in the process of backwashing of the backwashing assembly is a common knowledge in the field and is not disclosed in detail here.

[0031] In the specific implementation, the oil slurry is a mixture of components such as alkanes, aromatic hydrocarbons, resins, sulfur and catalyst particles. In actual production, when the oil slurry pump extracts the oil slurry, the coking substances contained in the oil slurry and the solid particles contained in the oil slurry will impact the blades inside the oil slurry pump body 3, thereby easily causing blade wear. In addition, since the oil slurry pump of the catalytic cracking device is a centrifugal pump, the working temperature is 350°C, and therefore the oil slurry pump needs to be preheated before working.

[0032] By additionally providing the front box 5 at the oil inlet end of the oil slurry pump body 3, the coking substances contained in the oil slurry and the solid particles contained in the oil slurry are filtered by the front box 5 during the working of the oil slurry pump body 3, thereby reducing the impact of the coking substances contained in the oil slurry and the solid particles contained in the oil slurry on the blades and achieving the purpose of protecting the oil slurry pump body 3.

[0033] Before the oil slurry pump body 3 is used to transport the oil slurry, the front box 5 is first backwashed by the backwashing assembly, which is conducive to avoiding the situation that the coking substances and solid particles contained in the oil slurry block the front box 5, thereby causing the oil slurry to be unable to enter the oil slurry pump body 3 through the front box 5. After washing the front box 5 for a period of time, the backwashing assembly is controlled to preheat the oil slurry pump body 3, thereby avoiding the situation that the oil slurry pump body 3 is started to be pumped empty due to not being preheated during starting.

[0034] During preheating, the preheated washing oil is recycled and temporarily stored in the empty groove 13. During the subsequent working of the oil slurry pump body 3, the oil slurry pump body 3 will extract high-temperature oil slurry, which is then backflowed through the oil outlet conduit 31. During the passage of the oil slurry through the oil outlet conduit 31, the heat in the oil slurry is conducted to the washing oil temporarily stored in the empty groove 13 through the oil outlet conduit 31, so that the temperature of the washing oil rises.

[0035] After the oil slurry is pumped out by the oil slurry pump body 3, the oil slurry pump body 3 is backwashed by the backwashing assembly, and the pre-tank 5 is also backwashed. During the washing process, the coking matter contained in the filtered oil slurry in the pre-tank 5 and the solid particles contained in the oil slurry are washed out, so that the impurities in the pre-tank 5 are discharged. At this time, the washing oil used for backwashing is the washing oil temporarily stored in the empty tank 13. After the washing oil absorbs the heat of the oil slurry through the oil outlet conduit 31, the temperature of the washing oil is relatively high, and there is no large temperature difference between the washing oil and the pre-tank 5, so that the effective washing cannot be performed due to the large temperature difference between the washing oil and the pre-tank 5. This is beneficial to avoid the solidification of the coking matter contained in the oil slurry and the solid particles contained in the oil slurry due to the large temperature difference, and further avoid the inconvenience of washing.

[0036] The recovery and treatment of the washing oil by the empty tank 13 can increase the weight of the installation base 1, and improve the stability of the installation base 1 by increasing the weight. During the operation of the oil slurry pump body 3, a certain vibration is generated. By recovering the washing oil into the empty tank 13, the vibration generated by the oil slurry pump body 3 can be absorbed and offset by the washing oil, which is a liquid. The viscosity and flowability of the liquid can absorb the vibration energy, thereby achieving a certain damping effect.

[0037] As a further embodiment of the present application, the oil slurry pump body 3 is drivingly connected to a servo motor 2 away from the pre-tank 5. The servo motor 2 is fixedly connected to the installation base 1. An impeller 15 is rotatably connected in the oil slurry pump body 3. An arc-shaped repulsion strip 30 is fixedly connected to each blade of the impeller 15. An oil inlet pipe 8 and an oil outlet pipe 9 are respectively communicated with both ends of the pre-tank 5. The oil inlet pipe 8 is communicated with the oil slurry pipeline. The oil outlet pipe 9 is communicated with the input end of the oil slurry pump body 3. A preheating water pipe 10 is further communicated with the bottom of the oil outlet pipe 9. The preheating water pipe 10 is communicated with the empty tank 13 away from the oil outlet pipe 9.

[0038] In specific implementation, during the operation of the oil slurry pump body 3, the servo motor 2 drives the impeller 15 to rotate. The pre-tank 5 filters the larger impurities in the oil slurry to protect the impeller 15. This is beneficial to avoid the impeller 15 being damaged by the larger impurities in the oil slurry. The repulsion strip 30 can play a role similar to a reinforcing rib to improve the strength of the impeller 15 and further improve the impact resistance of the impeller 15.

[0039] In the process of the operation of the oil slurry pump body 3, the oil slurry enters the oil inlet pipe 8 through the oil slurry pipeline, then is filtered by the pre-tank 5, and then enters the oil slurry pump body 3 through the oil outlet pipe 9, and then enters the oil outlet conduit 31 through the output end of the oil slurry pump body 3, and then flows back to the fractionating tower through the oil outlet conduit 31.

[0040] As a further embodiment of the present application, the backwashing assembly comprises a water tank 6, which is pre-added with washing oil, and a heat-resistant submersible pump 11 arranged in the water tank 6, and the input end of the heat-resistant submersible pump 11 is communicated with a three-way electromagnetic valve 12, the output end of the three-way electromagnetic valve 12 is communicated with the input end of the heat-resistant submersible pump 11, the three-way electromagnetic valve 12 is provided with two input ends, the two input ends of the three-way electromagnetic valve 12 are respectively communicated with the water tank 6 and an empty groove 13, the output end of the heat-resistant submersible pump 11 is communicated with the output end of the oil slurry pump body 3, and a heating plate is arranged in the water tank 6, which is used to increase the temperature of the washing oil in the water tank 6 and preheat the oil slurry pump body 3.

[0041] In specific implementation, before the oil slurry pump body 3 starts to work, the heating plate is turned on to increase the temperature of the washing oil in the water tank 6, then the heat-resistant submersible pump 11 is turned on to extract appropriate washing oil from the water tank 6, then the washing oil enters the output end of the oil slurry pump body 3, and finally the washing oil leaves through the input end of the oil slurry pump body 3. After the washing oil leaves the oil slurry pump body 3, on the one hand, the pre-tank 5 is backwashed, and on the other hand, the preheated washing oil in the oil slurry pump body 3 is recovered to the empty groove 13 through the preheating water pipe 10.

[0042] After the oil slurry pump body 3 finishes working, the input end of the heat-resistant submersible pump 11 is controlled by the three-way electromagnetic valve 12 to extract the washing oil from the empty groove 13 to realize the backwashing work of the pre-tank 5. The three-way electromagnetic valve 12 is a two-in-one-out three-way valve, when the oil slurry pump body 3 is preheated, the input end of the three-way electromagnetic valve 12 is communicated with the water tank 6, and when the oil slurry pump body 3 finishes working, the input end of the three-way electromagnetic valve 12 is communicated with the empty groove 13. In this way, on the one hand, the washing oil in the empty groove 13 can be heated by the oil outlet conduit 31, so that the temperature difference between the pre-tank 5 and the washing oil during backwashing will not be too large, and on the other hand, the washing oil in the empty groove 13 can be extracted after the oil slurry pump body 3 finishes working, which can reduce the overall weight of the device and make the device easy to transport.

[0043] Secondly, the heating plate stops heating after heating the flushing oil in the water tank 6, and the flushing oil in the empty groove 13 is heated by the oil outlet conduit 31, so that the heat of the oil slurry can be effectively utilized, and the purpose of energy saving is achieved, and the situation that the heating plate is still needed to heat the flushing oil during backwashing is avoided.

[0044] As a further embodiment of the present application, the output end of the oil slurry pump body 3 is also communicated with a "U"-shaped oil discharge pipe 4, the end of the oil discharge pipe 4 away from the oil slurry pump body 3 is communicated with the oil outlet conduit 31, the output end of the heat-resistant submersible pump 11 is communicated with a water inlet pipe 7, the end of the water inlet pipe 7 away from the heat-resistant submersible pump 11 is communicated on one side of the output end of the oil slurry pump body 3, and a first electromagnetic valve 16 is arranged at the communication position, a second electromagnetic valve 17 is arranged at the communication position between the oil discharge pipe 4 and the output end of the oil slurry pump body 3, a backflow valve 24 is arranged at the communication position between the preheating water pipe 10 and the oil outlet pipe 9, the backflow valve 24 is used to recycle the flushing oil into the empty groove 13 during the preheating of the oil slurry pump body 3, and a block valve 23 is arranged at the communication position between the pre-tank 5 and the oil outlet pipe 9.

[0045] In the preheating process of the oil slurry pump body 3, the second electromagnetic valve 17 is closed, and the first electromagnetic valve 16 is opened, at this time, the flushing oil extracted by the heat-resistant submersible pump 11 flows into the oil slurry pump body 3 through the water inlet pipe 7, and then flows into the oil outlet pipe 9 through the input end of the oil slurry pump body 3, during this process, the backflow valve 24 is closed, and the block valve 23 is opened, so as to achieve the purpose of backwashing the pre-tank 5 before the oil slurry pump body 3 works, after flushing the pre-tank 5 for a certain period of time, the block valve 23 is closed, at this time, the backflow valve 24 is opened, and the oil slurry pump body 3 is preheated by the flushing oil, at this time, the flushing oil flows into the empty groove 13 through the preheating water pipe 10 for temporary storage.

[0046] After the oil slurry pump body 3 works, the pre-tank 5 is backwashed by the flushing oil temporarily stored in the empty groove 13, during this process, the second electromagnetic valve 17 is closed, the first electromagnetic valve 16 is opened, the backflow valve 24 is always in a closed state, and the block valve 23 is always in an open state.

[0047] During the working process of the oil slurry pump body 3, the first electromagnetic valve 16 and the backflow valve 24 are both in a closed state, and the second electromagnetic valve 17 and the block valve 23 are both in an open state, so that the oil slurry pump body 3 can smoothly deliver the oil slurry.

[0048] As a further embodiment of the application, the inner bottom of the pre-tank 5 is provided with a buffer cavity 19, and the inner top of the pre-tank 5 is provided with a buffer groove. A extension plate is fixedly connected to one end of the buffer groove close to the oil outlet pipe 9. The extension plate is located below the oil outlet pipe 9. An inclined filter plate 18 is fixedly connected to the top of the end of the extension plate away from the oil outlet pipe 9. The filter plate 18 is used to filter the oil slurry drawn in by the oil inlet pipe 8. A plate valve 21 is arranged between the buffer groove and the buffer cavity 19. A discharge port is formed in one side of the buffer cavity 19. A cover 27 is movably sealed in the discharge port. An air bag is arranged at the abutting position of the cover 27 and the pre-tank 5. It should be noted that the filter plate 18 can allow small catalyst particles to pass through.

[0049] In the specific implementation, during the operation of the oil slurry pump body 3, the oil slurry pump body 3 will draw oil slurry. During the drawing of the oil slurry, the oil slurry will enter the pre-tank 5 through the oil inlet pipe 8. Then, the oil slurry will impact on the filter plate 18. Due to the inclined arrangement of the filter plate 18, the coking matter and solid particles in the oil slurry will move downward under the shelter of the filter plate 18, and then settle in the buffer groove, thereby achieving the filtering effect, filtering the coking matter and solid particles in the oil slurry, avoiding the coking matter and solid particles from impacting on the impeller 15, thereby causing damage to the impeller 15, and being beneficial to improving the service life of the impeller 15. At the same time, after the coking matter and solid particles are filtered, the coking matter and solid particles can also avoid the situation of solidifying in the oil slurry pump body 3, which is beneficial to avoiding the serious wear and tear of the inside of the oil slurry pump body 3.

[0050] During the operation of the oil slurry pump body 3, the plate valve 21 and the cover 27 are in a closed state. By using the double sealing of the plate valve 21 and the cover 27, the leakage of the pre-tank 5 can be effectively avoided.

[0051] After the operation of the oil slurry pump body 3 is completed, the pre-tank 5 is backwashed. The washing oil enters the oil outlet pipe 9 after flowing through the oil slurry pump, and then impacts on the filter plate 18 to effectively backwash the filter plate 18. Due to the inclined arrangement of the filter plate 18, the probability of the coking matter and solid particles in the oil slurry being stuck on the filter plate 18 is reduced during the operation of the oil slurry pump body 3. By generating a downward component force from the horizontal impact force, the impact of the coking matter and solid particles on the filter plate 18 is reduced, and the probability of the coking matter and solid particles being stuck on the filter plate 18 is also reduced, which is beneficial to avoiding the situation of the coking matter and solid particles being stuck on the filter plate 18. After the operation of the oil slurry pump body 3 is completed, the reverse washing of the washing oil can also backwash the small amount of coking matter and solid particles stuck on the filter plate 18, further ensuring the smoothness of the filter plate 18, and being beneficial to avoiding the situation of the filter plate 18 being blocked.

[0052] In the process of backwashing the filter plate 18, at this time the plate valve 21 and the cover 27 are both in the open state, the sludge pump body 3 in the working process is filtered by the filter plate 18, and the coking matter and solid particles are also dropped into the buffer cavity 19 through the plate valve 21, and then discharged through the discharge port, in this process, the flushing oil also impacts the coking matter and solid particles filtered in the pre-tank 5, and the flow of the flushing oil is used to promote the discharge of the coking matter and solid particles.

[0053] As an optional embodiment, a reverse flow valve is arranged at the communication position of the oil inlet pipe 8 and the pre-tank 5, and the reverse flow valve is used to prevent the flushing oil from flowing back to the oil inlet pipe 8 in the process of backwashing the filter plate 18, and the reverse flow valve is only opened in the working process of the sludge pump body 3 and the servo motor 2.

[0054] As a further embodiment of the present application, the inside of the pre-tank 5 is provided with a mounting groove 26, the mounting groove 26 is located between the buffer groove and the buffer cavity 19, the bottom of the buffer groove is provided with four discharge inclined surfaces 25, the discharge inclined surfaces 25 are located at the top of the mounting groove 26, a rectangular frame-shaped vibration transmission plate 20 is fixedly connected in the mounting groove 26, a plurality of vibration plates 29 are fixedly connected to the top and bottom of the vibration transmission plate 20 at equal intervals, and the top wall plates of the plurality of vibration plates 29 are fixedly connected to the bottom wall plates of the discharge inclined surfaces 25.

[0055] In specific implementation, in the working process of the sludge pump body 3, the coking matter and solid particles filtered by the filter plate 18 are deposited on the discharge inclined surfaces 25, and in the process of discharging, the coking matter and solid particles are effectively promoted to pass through the opened plate valve 21 and enter the buffer cavity 19 through the discharge inclined surfaces 25.

[0056] Through the arrangement of the vibration transmission plate 20 and the plurality of vibration plates 29, the discharge inclined surfaces 25 can be effectively supported.

[0057] As a further embodiment of the present application, the bottom of the sludge pump body 3 is fixedly connected with a support, the support is fixedly connected to the top wall plate of the mounting base 1, the bottom of the servo motor 2 is fixedly connected with a mounting seat, the mounting seat is also fixedly connected to the top wall plate of the mounting base 1, a plurality of support columns 14 are fixedly connected in the mounting base 1, the plurality of support columns 14 are distributed below the two ends of the two sides of the support and below the center of the mounting seat, and the plurality of support columns 14 are used to support the sludge pump body 3 and the servo motor 2.

[0058] In specific implementation, through the arrangement of the plurality of support columns 14, on the one hand, the servo motor 2 and the sludge pump body 3 can be effectively supported, and on the other hand, the vibration generated by the servo motor 2 and the sludge pump body 3 in the working process can be effectively conducted to the flushing oil recovered in the air groove 13 for absorption.

[0059] As a further implementation of the present application, one connecting plate 28 is fixedly connected between every two adjacent support columns 14, and the connecting plate 28 is fixedly connected with a Z-shaped connecting rod 22 at the center of one end of the front box 5, and the end of the connecting rod 22 away from the connecting plate 28 penetrates through the wall plate of the installation base 1 and the front box 5, and the end of the connecting rod 22 away from the connecting plate 28 is fixedly connected with the vibration transmission plate 20 at one end close to the installation base 1.

[0060] In specific implementation, during the working of the oil slurry pump body 3, the vibration generated by the servo motor 2 and the oil slurry pump body 3 is partly conducted to the flushing oil in the air slot 13, and the other part is conducted to the vibration transmission plate 20 and the vibration plate 29 through the connecting rod 22, so as to make the discharge inclined surface 25 vibrate, which can effectively prevent the coking and solid particles from adhering to the discharge inclined surface 25 after settling, and is beneficial to the subsequent discharge of the coking and solid particles.

[0061] As a further implementation of the present application, the top horizontal end of the connecting rod 22 is fixedly connected with an elastic plate 32 at the connection with the vertical end, and the elastic plate 32 is located directly below the communication between the preheating water pipe 10 and the air slot 13.

[0062] In specific implementation, during the preheating of the oil slurry pump body 3, the flushing oil will impact on the elastic plate 32, the elastic plate 32 will vibrate, and then the vibration is conducted to the vibration transmission plate 20 and the vibration plate 29, so as to make the discharge inclined surface 25 vibrate, and through the reverse flushing of the filter plate 18 before the preheating of the oil slurry pump body 3, the coking and solid particles not flushed on the discharge inclined surface 25 are wetted, and through the vibration conducted by the elastic plate 32, the residual coking and solid particles on the discharge inclined surface 25 can be shaken off, and the situation that the coking and solid particles adhere to the discharge inclined surface 25 is further avoided.

[0063] As a further implementation of the present application, the output shaft of the servo motor 2 is fixedly connected with a pump shaft, the oil slurry pump body 3 is drivingly connected with the servo motor 2 through the pump shaft, the water tank 6 is provided with a filling port at one end of the top, and the top of the filling port is provided with a cover plate.

[0064] In specific implementation, after the flushing oil in the water tank 6 is used up, the cover plate is opened to add the flushing oil into the water tank 6.

[0065] Working principle of the present application:

[0066] The application is used, before the oil slurry is transmitted by the oil slurry pump body 3, the heating plate is opened first, the flushing oil in the water tank 6 is heated by the heating plate, after being heated, the heat-resistant submersible pump 11 is opened, at this time, the three-way electromagnetic valve 12 is communicated with the water inlet pipe 7, the second electromagnetic valve 17 and the backflow valve 24 are in the closed state, and the first electromagnetic valve 16 and the blocking valve 23 are in the opened state. In this process, the flushing oil enters the oil slurry pump body 3 through the output end of the heat-resistant submersible pump 11 and the oil slurry pump body 3, then enters the oil outlet pipe 9 through the output end of the oil slurry pump body 3, and finally enters the pre-tank 5, and the filter plate 18 is back-flushed, which can preheat the filter plate 18 and flush the coking and solid particles in the filter plate 18.

[0067] After the filter plate 18 is flushed for a proper time, the blocking valve 23 is closed and the backflow valve 24 is opened, at this time, the flushing oil enters the oil outlet pipe 9 and then flows to the empty groove 13 through the preheating water pipe 10, and is temporarily stored in the empty groove 13, which can improve the stability of the installation base 1 by increasing the weight, and can also conduct part of the heat of the oil slurry to the flushing oil during the subsequent transmission of the oil slurry, and can also effectively absorb and offset the vibration generated by the oil slurry pump body 3 and the servo motor 2 during the working process.

[0068] After the oil slurry pump body 3 is preheated, the first electromagnetic valve 16 and the backflow valve 24 are in the closed state, and the second electromagnetic valve 17, the backflow valve and the blocking valve 23 are in the opened state, so that the oil slurry pump body 3 can effectively transmit the oil slurry.

[0069] After the oil slurry pump body 3 works, the first electromagnetic valve 16 and the blocking valve 23 are opened, the second electromagnetic valve 17, the backflow valve 24 and the backflow valve are closed, and the input end of the three-way electromagnetic valve 12 is communicated with the empty groove 13, then the heat-resistant submersible pump 11 is opened, and the flushing oil is used to realize the flushing work of the filter plate 18, in this process, the plate valve 21 and the cover 27 are in the opened state, so that the flushing oil carries the coking and solid particles filtered in the pre-tank 5 to the outside of the pre-tank 5, and promotes the discharge work of the coking and solid particles.

[0070] The above shows and describes the basic principles, main features and advantages of the application. Those skilled in the art should understand that the application is not limited to the above examples, and the above examples and descriptions in the specification are only the principles of the application, and various changes and improvements can be made without departing from the spirit and scope of the application, and these changes and improvements all fall within the scope of the claimed application.

Claims

1. A catalytic cracking unit slurry pump with backwashing function, comprising a mounting base (1), characterized in that: One end of the top of the mounting base (1) is fixedly connected to an oil slurry pump body (3), an oil inlet end of the oil slurry pump body (3) is connected to a front box (5) for filtering, an oil outlet end of the oil slurry pump body (3) is connected to an oil outlet conduit (31), and the oil outlet end of the oil slurry pump body (3) is connected to a backwash component, and the backwash component is also used to preheat the oil slurry pump body (3). An empty groove (13) is opened inside the mounting base (1), and the empty groove (13) is used to recover the flushing oil of the backwash component. The oil outlet conduit (31) is placed in the empty groove (13), and the oil outlet conduit (31) passes through an end wall plate of the mounting base (1) away from the oil slurry pump body (3); The side of the oil slurry pump body (3) away from the front box (5) is connected to the servo motor (2) in a transmission manner. The servo motor (2) is fixedly connected to the mounting base (1). The internal rotation of the oil slurry pump body (3) is connected to the impeller (15). Each blade of the impeller (15) is fixedly connected to an arc-shaped repulsive bar (30). The two ends of the front box (5) are respectively connected to the oil inlet pipe (8) and the oil outlet pipe (9). The oil inlet pipe (8) is connected to the oil slurry pipeline, and the oil outlet pipe (9) is connected to the input end of the oil slurry pump body (3). The bottom of the oil outlet pipe (9) is also connected to the preheated water pipe (10). The end of the preheated water pipe (10) away from the oil outlet pipe (9) is connected to the empty groove (13); The backwash component includes a water tank (6), flushing oil is pre-added in the water tank (6), a heat-resistant submersible pump (11) is arranged inside the water tank (6), the input end of the heat-resistant submersible pump (11) is connected to a three-way solenoid valve (12), the output end of the three-way solenoid valve (12) is connected to the input end of the heat-resistant submersible pump (11), the three-way solenoid valve (12) is provided with two input ends, the two input ends of the three-way solenoid valve (12) are respectively connected to the water tank (6) and the empty slot (13), the output end of the heat-resistant submersible pump (11) is connected to the output end of the oil slurry pump body (3), and a heating plate is arranged inside the water tank (6), the heating plate is used to increase the temperature of the flushing oil in the water tank (6) and preheat the oil slurry pump body (3).

2. The catalytic cracking unit slurry pump with backwashing function according to claim 1, characterized in that: The output end of the slurry pump body (3) is also connected to a U-shaped oil discharge pipe (4), and one end of the oil discharge pipe (4) away from the slurry pump body (3) is connected to the oil outlet conduit (31). The output end of the heat-resistant submersible pump (11) is connected to a water inlet pipe (7), and one end of the water inlet pipe (7) away from the heat-resistant submersible pump (11) is connected to one side of the output end of the slurry pump body (3), and a first solenoid valve (16) is provided at the connection between the oil discharge pipe (4) and the output end of the slurry pump body (3). A second solenoid valve (17) is provided at the connection between the oil discharge pipe (4) and the output end of the slurry pump body (3). A reflux valve (24) is provided at the connection between the preheating water pipe (10) and the oil outlet pipe (9). The reflux valve (24) is used to recover the flushing oil to the empty tank (13) during the preheating process of the slurry pump body (3). A blocking valve (23) is provided at the connection between the front box (5) and the oil outlet pipe (9).

3. The catalytic cracking unit slurry pump with backwashing function according to claim 1, characterized in that: A buffer chamber (19) is provided at the inner bottom of the front box (5), and a buffer groove is provided at the inner top of the front box (5). An extension plate is fixedly connected to one end of the buffer groove close to the oil outlet pipe (9), and the extension plate is located below the oil outlet pipe (9). An inclined filter plate (18) is fixedly connected to the top of one end of the extension plate away from the oil outlet pipe (9). The filter plate (18) is used to filter the oil slurry drawn in by the oil inlet pipe (8). A plate valve (21) is provided between the buffer groove and the buffer chamber (19), and a discharge port is provided on one side of the buffer chamber (19). A cover (27) is movably sealed in the discharge port, and an air bag is provided at the contact point between the cover (27) and the front box (5).

4. The catalytic cracking unit slurry pump with backwashing function according to claim 3, characterized in that: The front box (5) is provided with a mounting groove (26) inside, and the mounting groove (26) is located between the buffer groove and the buffer cavity (19). Four discharge slopes (25) are provided at the bottom of the buffer groove, and the discharge slopes (25) are located at the top of the mounting groove (26). A rectangular frame-shaped vibration transmission plate (20) is fixedly connected in the mounting groove (26). The top and bottom of the vibration transmission plate (20) are fixedly connected with multiple vibration plates (29) at equal distances, and the top wall panels of the multiple vibration plates (29) are fixedly connected to the bottom wall panels of the discharge slopes (25).

5. The catalytic cracking unit slurry pump with backwashing function according to claim 1, characterized in that: The bottom of the oil slurry pump body (3) is fixedly connected to a support, which is fixedly connected to the top wall plate of the mounting base (1). The bottom of the servo motor (2) is fixedly connected to a mounting base, which is also fixedly connected to the top wall plate of the mounting base (1). A plurality of support columns (14) are fixedly connected inside the mounting base (1). The plurality of support columns (14) are distributed and located directly below the ends of both sides of the support and directly below the center of the mounting base. The plurality of support columns (14) are used to support the oil slurry pump body (3) and the servo motor (2).

6. The catalytic cracking unit slurry pump with backwashing function according to claim 5, characterized in that: A connecting plate (28) is fixedly connected between two adjacent support columns (14), and a "Z"-shaped connecting rod (22) is fixedly connected to the center of one end of the connecting plate (28) close to the front box (5), and the end of the connecting rod (22) away from the connecting plate (28) passes through the mounting base (1) and the wall panel of the front box (5), and the end of the connecting rod (22) away from the connecting plate (28) is fixedly connected to the end of the vibration transmission plate (20) close to the mounting base (1).

7. The catalytic cracking unit slurry pump with backwashing function according to claim 6, characterized in that: An elastic plate (32) is fixedly connected to the connection between the top horizontal end and the vertical end of the connecting rod (22), and the elastic plate (32) is located directly below the connection point between the preheating water pipe (10) and the empty groove (13).

8. The catalytic cracking unit slurry pump with backwashing function according to claim 1, characterized in that: The output shaft of the servo motor (2) is fixedly connected to the pump shaft, and the slurry pump body (3) is transmission-connected to the servo motor (2) via the pump shaft. The water tank (6) is provided with a refueling port at one end of the top, and a cover plate is provided on the top of the refueling port.

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