Method and equipment for identifying catalyst crushing fault source in catalytic cracking device

Abstract

The invention provides a method and equipment for identifying a catalyst breakage fault source in a catalytic cracking device. The method comprises the following steps: acquiring catalyst particle size distribution curves and scanning electron microscope pictures of catalyst samples at different positions in the catalytic cracking device; wherein the catalyst samples at different positions are collected during the fault occurrence period; judging the crushing type according to the apparent morphology of the catalyst in the scanning electron microscope picture; judging whether the catalytic cracking device breaks down or not according to the crushing type; and if the catalytic cracking device has a fault, judging the position of a catalyst crushing fault source according to the average particle size value in the catalyst particle size distribution curve of the catalyst samples at different positions and the fine powder content in the catalyst samples. According to the method, the broken fault source can be quickly and accurately diagnosed through the particle size distribution and the particle morphology of the catalyst on the fault side and the normal side in the FCC device, and the problem that the fault source is difficult to judge when the catalyst in the FCC device is broken is solved.

Description

Technical Field

[0001] The invention relates to the technical field of petrochemical industry, and in particular to a method and equipment for identifying a catalyst breakage fault source in a catalytic cracking device. Background Art

[0002] In the process of oil refining, crude oil with complex components is processed through a primary process (including atmospheric distillation and vacuum distillation) to obtain straight-run products, and then the straight-run products are used as raw materials for secondary processing (including catalytic cracking, delayed coking, catalytic reforming, hydrocracking, gasoline and diesel hydrogenation, etc.) to obtain light oil with relatively simple components. Among them, fluid catalytic cracking (FCC) is an important secondary processing technology for converting heavy oil into light oil. In the catalytic cracking unit, heavy oil undergoes cracking reaction under the action of high temperature and catalyst, and is converted into gasoline, diesel and cracked gas.

[0003] In the catalytic cracking unit, the fluidized catalyst particles need to pass through the riser reactor, settler, regenerator, and finally return to the riser for continuous circulation. In this process, the catalyst particles are subjected to the combined effects of mechanical stress, dynamic stress, thermal stress and chemical stress, and the movement trajectory is complex and changeable. The particles themselves will undergo morphological changes, such as wear or breakage, which will eventually lead to a reduction in the catalyst particle size and make it easy to be carried away by oil gas or flue gas, resulting in catalyst loss, which in turn leads to the unstable operation of the FCC unit or product pollution.

[0004] The source of the FCC unit failure caused by catalyst breakage is generally located inside the reactor or regenerator, which is highly hidden and difficult to detect. The existing technology mainly focuses on the monitoring of catalyst wear and the preparation of wear-resistant catalysts to achieve the prevention or early warning of FCC unit failures. However, the catalyst wear problem is not only affected by the properties of the catalyst itself, but also has a direct relationship with the unit's own fault source. The existing technology lacks an accurate identification method for the catalyst breakage fault source. Summary of the invention

[0005] The present invention provides a method and device for identifying a catalyst crushing fault source in a catalytic cracking unit, so as to solve the defect that the prior art can only prevent FCC unit faults but cannot locate the catalyst crushing fault source, thereby determining the fault source position through the apparent morphology of the catalyst, and repairing the fault source in time to ensure the stable operation of the FCC unit.

[0006] The present invention provides a method for identifying a catalyst breakage fault source in a catalytic cracking unit, comprising the following steps.

[0007] Obtaining catalyst particle size distribution curves and scanning electron microscope images of catalyst samples at different positions in the catalytic cracking unit; wherein the catalyst samples at different positions are collected during the period when the fault occurs; Determine the type of breakage based on the apparent morphology of the catalyst in the scanning electron microscope image; According to the type of crushing, determining whether the catalytic cracking unit fails; If the catalytic cracking unit fails, the location of the catalyst breakage failure source is determined based on the average particle size in the catalyst particle size distribution curve of the catalyst samples at different positions and the fine powder content in the catalyst samples.

[0008] According to a method for identifying a catalyst breakage fault source in a catalytic cracking unit provided by the present invention, judging whether the catalytic cracking unit has a fault according to the breakage type includes: If the crushing type is the type of crushing first and then wearing, the catalytic cracking unit fails.

[0009] According to a method for identifying a catalyst crushing fault source in a catalytic cracking unit provided by the present invention, the method further comprises: If the breakage type of the catalyst sample is any one or more of the wear type, the breakage type, the catalytic cracking unit has not failed.

[0010] According to a method for identifying a catalyst crushing fault source in a catalytic cracking unit provided by the present invention, if the catalytic cracking unit fails, the location of the catalyst crushing fault source is determined based on the average particle size of the catalyst sample and the fine powder content in the catalyst sample, including: Among the catalyst samples at different positions, the position of the catalyst sample with the largest average particle size and the least fine powder content is selected as the position of the catalyst breakage fault source; wherein the position of the catalyst breakage fault source is one of the reactor and the regenerator.

[0011] According to a method for identifying a catalyst breakage fault source in a catalytic cracking unit provided by the present invention, the step of obtaining catalyst particle size distribution curves and scanning electron microscope images of catalyst samples at different positions in the catalytic cracking unit comprises: Analyzing the catalyst sample by a laser particle size analyzer to obtain the catalyst particle size distribution curve; The scanning electron microscope image of the catalyst sample is obtained using a scanning electron microscope.

[0012] According to a method for identifying a catalyst breakage fault source in a catalytic cracking unit provided by the present invention, the particle size of the fine powder is less than 40㎛.

[0013] According to a method for identifying a catalyst breakage fault source in a catalytic cracking unit provided by the present invention, the catalyst sample comprises at least one of a balanced catalyst, a spent catalyst and a three-rotation fine powder.

[0014] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, a method for identifying a catalyst crushing fault source in a catalytic cracking unit as described in any one of the above-mentioned methods is implemented.

[0015] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method for identifying a catalyst crushing fault source in a catalytic cracking unit as described in any one of the above is implemented.

[0016] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the method for identifying a catalyst crushing fault source in a catalytic cracking unit as described in any one of the above is implemented.

[0017] The present invention provides a method and device for identifying the source of catalyst crushing failure in a catalytic cracking unit, by obtaining the catalyst particle size distribution curve and scanning electron microscope image of catalyst samples at different positions in the catalytic cracking unit; wherein the catalyst samples at different positions are collected during the period when the failure occurs; judging the crushing type according to the catalyst surface morphology in the scanning electron microscope image; judging whether the catalytic cracking unit fails according to the crushing type; if the catalytic cracking unit fails, judging the location of the catalyst crushing failure source according to the average particle size in the catalyst particle size distribution curve of the catalyst samples at different positions and the fine powder content in the catalyst sample. The method can quickly and accurately diagnose the source of crushing failure through the catalyst particle size distribution and particle morphology on the fault side and the normal side of the FCC unit, and solve the problem of difficulty in judging the source of failure when the catalyst crushing problem occurs in the existing industrial FCC unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic flow chart of a method for identifying a catalyst breakage fault source in a catalytic cracking unit provided by the present invention.

[0020] Figure 2This is a diagram of the catalyst wear and breakage model provided by the present invention.

[0021] Figure 3 It is a schematic diagram of the crushing particles of the crushing-first-and-then-wearing type provided by the present invention.

[0022] Figure 4 It is a schematic diagram of a scanning electron microscope of the first-crushing-then-wearing type provided by the present invention.

[0023] Figure 5 It is a schematic diagram of the PSD curves of the normal side and the fault side provided by the present invention.

[0024] Figure 6 It is a schematic diagram of the particle size characteristic points of the regeneration agent provided by the present invention.

[0025] Figure 7 It is a schematic diagram of the particle size characteristic points of the spent agent provided by the present invention.

[0026] Figure 8 It is a structural schematic diagram of a device for identifying a catalyst breakage fault source in a catalytic cracking unit provided by the present invention.

[0027] Fig. 9 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Combine the following Figure 1-Figure 9 Specific embodiments of the present invention are described.

[0030] Figure 1 This is one of the flow diagrams of the method for identifying the source of catalyst breakage failure in a catalytic cracking unit provided by the present invention, such as Figure 1 As shown, the method includes the following.

[0031] Step 101, obtaining catalyst particle size distribution curves and scanning electron microscope images of catalyst samples at different positions; wherein the catalyst samples at different positions are collected during the period when the fault occurs.

[0032] Specifically, first, during the period of failure, catalyst samples are collected from different positions in the catalytic cracking unit, wherein the catalyst samples include at least one of equilibrium catalyst, spent catalyst (hereinafter referred to as spent catalyst) and three-rotation fine powder.

[0033] The above steps are described in detail below using a specific scenario. During the operation of a certain FCC unit, it was found that the catalyst suddenly suffered a large amount of damage, the catalyst consumption increased significantly, and the flue gas particle concentration and oil slurry solid content at the outlet of the regenerator side exceeded the normal standard. At this time, the specific location analysis of the source of the catalyst crushing fault began (although the excessive flue gas concentration was found on the regenerator side, the source of the fault may not be in the regenerator. This application needs to locate the source of the FCC unit fault that caused the catalyst to crush, that is, the catalyst crushing fault source). Collect catalyst samples from different positions in the catalytic cracking unit, including the above-mentioned balanced catalyst, spent catalyst, three-rotation fine powder, etc.

[0034] Among them, the catalyst particle size distribution curve (Particle Size Distribution, PSD), also known as the particle size distribution curve, is a graph that describes the proportion of particles of different sizes in a particle group. The PSD particle size distribution curve is a cumulative or frequency distribution graph with particle size as the horizontal coordinate and relative number or volume percentage as the vertical coordinate. It reflects the proportion of particles of different sizes in a group of particle samples. Through the PSD particle size distribution curve, we can gain an in-depth understanding of the composition and properties of the particles to meet different process and application requirements. Scanning electron microscope images (SEM, Scanning Electron Microscope) are scanning electron microscope images that use a high-energy electron beam to scan the sample surface and obtain the sample surface microstructure for imaging by detecting the signal generated by the interaction between electrons and samples.

[0035] Specifically, the catalyst samples obtained at different positions are analyzed separately by laser particle size analyzer, scanning electron microscope and other instruments to obtain catalyst particle size distribution (PSD) curves and scanning electron microscope (SEM) images of the catalyst samples at each position.

[0036] Step 102, judging the type of breakage according to the catalyst surface morphology in the scanning electron microscope image.

[0037] Among them, catalyst surface morphology refers to the microscopic geometric shape or structural characteristics of the surface of an object or material, such as roughness, texture, undulations, grooves, etc.

[0038] like Figure 2 As shown, Figure 2 This is a model diagram of catalyst wear and crushing, in which the particles after normal wear are smooth round spheres and fine debris, and the impact crushed particles are non-spherical gravel.

[0039] Generally, if the device does not fail, the catalyst particles are either worn or broken, but once a failure occurs, the catalyst particles on the failed side are first broken and then worn, e.g. Figure 3 As shown, Figure 3 The final particle morphology is non-spherical gravel and fine debris. The SEM image is as follows: Figure 4 As shown. Therefore, it is possible to determine whether the catalyst sample is on the faulty side based on the apparent morphological features of different types of breakage under the SEM microscope. Specifically, first identify the graphic features on the SEM images of the catalyst samples at different positions mentioned above, and use the trained artificial intelligence model for identification to mark the breakage type on the image, such as first breakage and then wear, or first wear and then breakage, etc.

[0040] Step 103: judging whether the catalytic cracking unit fails according to the type of the fragmentation.

[0041] Specifically, if the crushing type of the catalyst sample is any one or more of the abrasion type and the crushing type, the catalytic cracking unit has not failed.

[0042] If the crushing type is the type of crushing first and then wearing, the catalytic cracking unit fails.

[0043] As mentioned above, if there are only worn or broken types in the catalyst sample, it is judged that the catalytic cracking unit has not failed. If the catalyst sample contains the type that was first broken and then worn, it is judged that the catalytic cracking unit has not failed. This is because if a failure occurs somewhere in the catalytic cracking unit, the catalyst on the failed side will first undergo a crushing stage, and the catalyst particles with higher sphericity will be crushed into multiple irregularly shaped particle fragments and a small amount of fine powder. The broken sub-particles will further wear the irregularly shaped particle fragments during the circulation fluidization and transportation process of the two devices (reactor and regenerator), and the size of the catalyst fragments will become smaller, but the sphericity will become higher, and the wear will produce more fine powder with a particle size of less than 40 μm, and will also produce more ultrafine powder with a particle size of less than 10 μm.

[0044] Step 104: if the catalytic cracking unit fails, the location of the catalyst breakage failure source is determined based on the average particle size in the catalyst particle size distribution curve of the catalyst samples at different positions and the fine powder content in the catalyst samples.

[0045] Specifically, among the catalyst samples at different positions, the position of the catalyst sample with the largest average particle size and the least fine powder content (or ultrafine powder) is selected as the position of the catalyst breakage fault source; wherein the position of the catalyst breakage fault source is one of the reactor and the regenerator.

[0046] Specifically, the location of the catalyst crushing fault source is determined based on the average particle size of the catalyst particles and the fine powder content (or ultrafine powder content). The judgment is based on the fact that the catalyst on the faulty side first undergoes crushing to form irregular gravel, and then the gravel flows from the faulty side to the non-faulty side and further wears away, producing a large amount of fine powder or ultrafine powder; as a result, the catalyst on the normal side has a low average particle size but a high fine powder content (or ultrafine powder), while the catalyst on the faulty side has a large average particle size but less fine powder (or ultrafine powder). Based on the above catalyst physical properties, the fault source is identified.

[0047] like Figure 5 As shown, Figure 5 The PSD curves of the normal side and the fault side are shown. Figure 5 It can be seen that the PSD curves of the two catalyst samples on the normal side and the fault side have the same change trend, both showing a bimodal distribution. Due to the wear and breakage of the catalyst, the main peak positions of the curves of the two catalysts move to the left of the fresh catalyst ( Figure 5 The particle size distribution curve of the fresh catalyst is not shown. The fresh catalyst refers to the catalyst that is continuously added to the FCC unit. The particle volume fraction of the fresh catalyst with a large diameter is larger. Figure 5 The main peak is and ). Among them, the average particle size of the catalyst on the normal side is smaller than that on the faulty side, and the fine powder content of the catalyst on the normal side is higher than that on the faulty side. This is because after the catalyst on the faulty side was broken, the sub-particle catalyst was not worn out in time, and the overall average particle size was slightly larger than that of the catalyst on the normal side; the catalyst on the normal side came from the two stages of breaking and wearing on the faulty side, and its fine powder content was higher than that on the faulty side. Furthermore, the ultrafine powder was also higher than that on the faulty side.

[0048] Therefore, based on the above characteristics and rules, the location of the catalyst breakage failure source can be determined.

[0049] In the above embodiment, the catalyst particle size distribution curve and scanning electron microscope image of the catalyst samples at different positions in the catalytic cracking unit are obtained; wherein the catalyst samples at different positions are collected during the period when the fault occurs; the type of crushing is determined according to the apparent morphology of the catalyst in the scanning electron microscope image; according to the type of crushing, whether the catalytic cracking unit has failed is determined; if the catalytic cracking unit has failed, the location of the catalyst crushing fault source is determined according to the average particle size in the catalyst particle size distribution curve of the catalyst samples at different positions and the fine powder content in the catalyst sample. This method can quickly and accurately diagnose the source of the crushing fault through the catalyst particle size distribution and particle morphology on the fault side and the normal side of the FCC unit, and solve the problem of difficulty in determining the fault source when the catalyst crushing problem occurs in the existing industrial FCC unit.

[0050] The following is a specific application scenario to illustrate the above method. During the operation of a certain device, the catalyst suddenly suffered a large amount of damage, the catalyst consumption increased significantly, the flue gas particle concentration at the outlet of the regenerator side and the solid content of the oil slurry exceeded the normal standard. By sampling the balance agent and the regenerated agent, the scanning electron microscope image of the balance agent showed a large number of broken and irregularly shaped particle fragments. The average particle size of the regenerated agent is slightly larger than the average particle size of the regenerated agent. The proportion of fine powder particles in the regenerated agent and the regenerated agent has increased, and the fine powder content of the regenerated agent has increased more than that of the regenerated agent. Based on the above data analysis, it is speculated that the source of the fault may be a fault in the internal components of the reactor. The device was shut down for maintenance and found that the steam ring pipe at the bottom of the stripping section was broken. After the stripping ring pipe broke, a large amount of high-speed steam sprayed out from the crack of the ring pipe, with a linear speed of up to 75m / s. The high-speed steam caused violent collisions and friction between particles, between particles and equipment and the wall of the vessel, resulting in depressions on the catalyst surface and a large number of broken particles. After the irregular catalyst is broken at the bottom of the stripping section, it enters the coke tank through the regeneration riser to complete the catalyst regeneration. During this process, the edges of the broken catalyst will be further worn, the particle size will be further reduced, and the fine powder content will increase. Therefore, the running characteristics of this device are that the proportion of fine powder in the regenerated agent is higher than that in the regenerated agent, but the average particle size is slightly lower than that in the regenerated agent. Figure 6 and Figure 7 As shown, Figure 6 and Figure 7 The sample numbers in the horizontal axis represent the sample numbers obtained on different dates. From left to right, they are samples obtained at different times as the reaction time increases. The above rules of catalyst property changes can be used as a basis for determining the location of the fault source.

[0051] The following is a description of the device for identifying a catalyst breakage fault source in a catalytic cracking unit provided by the present invention. The device for identifying a catalyst breakage fault source in a catalytic cracking unit described below and the method for identifying a catalyst breakage fault source in a catalytic cracking unit described above can be referred to each other.

[0052] like Figure 8 As shown, Figure 8 The schematic diagram of the structure of the device for identifying the source of catalyst breakage fault in the catalytic cracking unit includes the following modules.

[0053] The analysis parameter acquisition module 801 is used to obtain catalyst particle size distribution curves and scanning electron microscope images of catalyst samples at different positions in the catalytic cracking unit; wherein the catalyst samples at different positions are collected during the period when the fault occurs.

[0054] The fragmentation type determination module 802 is used to determine the fragmentation type according to the catalyst surface morphology in the scanning electron microscope image.

[0055] The fault judgment module 803 is used to judge whether the catalytic cracking unit has a fault according to the type of the fragmentation.

[0056] The fault source location judgment module 804 is used to judge the location of the catalyst breakage fault source according to the average particle size in the catalyst particle size distribution curve of the catalyst samples at different positions and the fine powder content in the catalyst samples if the catalytic cracking unit fails.

[0057] In one embodiment, the fault judgment module 803 is further used to: if the crushing type is the type of first crushing and then wear, then the catalytic cracking unit fails.

[0058] In one embodiment, the fault judgment module 803 is further used for: if the breakage type of the catalyst sample is any one or more of the wear type and the breakage type, then the catalytic cracking unit has not failed.

[0059] In one embodiment, the fault source position judgment module 804 is further used to: among the catalyst samples at different positions, select the position of the catalyst sample with the largest average particle size and the least fine powder content as the position of the catalyst breakage fault source; wherein the position of the catalyst breakage fault source is one of the reactor and the regenerator.

[0060] In one embodiment, the analysis parameter acquisition module 801 is further used to: analyze the catalyst sample by a laser particle size analyzer to obtain the catalyst particle size distribution curve; and obtain the scanning electron microscope image of the catalyst sample by a scanning electron microscope.

[0061] In one embodiment, the particle size of the fine powder is less than 40㎛.

[0062] In one embodiment, the catalyst sample includes at least one of an equilibrium catalyst, a spent catalyst, and tri-rotation fine powder.

[0063] Fig. 9 An example of a physical structure diagram of an electronic device is shown in FIG. Fig. 9As shown, the electronic device may include: a processor 910, a communication interface 920, a memory 930 and a communication bus 940, wherein the processor 910, the communication interface 920 and the memory 930 communicate with each other through the communication bus 940. The processor 910 may call the logic instructions in the memory 930 to execute a method for identifying a catalyst crushing fault source in a catalytic cracking unit, the method comprising: obtaining a catalyst particle size distribution curve and a scanning electron microscope image of catalyst samples at different positions in the catalytic cracking unit; wherein the catalyst samples at different positions are collected during the occurrence of the fault; judging the crushing type according to the catalyst surface morphology in the scanning electron microscope image; judging whether the catalytic cracking unit has a fault according to the crushing type; if the catalytic cracking unit has a fault, judging the location of the catalyst crushing fault source according to the average particle size in the catalyst particle size distribution curve of the catalyst samples at different positions and the fine powder content in the catalyst sample.

[0064] In addition, the logic instructions in the above-mentioned memory 930 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0065] On the other hand, the present invention also provides a computer program product, which includes a computer program, and the computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the method for identifying the source of catalyst crushing failure in a catalytic cracking unit provided by the above methods, and the method includes: obtaining catalyst particle size distribution curves and scanning electron microscope images of catalyst samples at different positions in the catalytic cracking unit; wherein the catalyst samples at different positions are collected during the period when the failure occurs; judging the type of crushing according to the apparent morphology of the catalyst in the scanning electron microscope image; judging whether the catalytic cracking unit has failed according to the type of crushing; if the catalytic cracking unit has failed, judging the location of the catalyst crushing failure source according to the average particle size in the catalyst particle size distribution curve of the catalyst samples at different positions and the fine powder content in the catalyst sample.

[0066] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the method for identifying the source of catalyst crushing failure in a catalytic cracking unit provided by the above-mentioned methods, the method comprising: obtaining catalyst particle size distribution curves and scanning electron microscope images of catalyst samples at different positions in the catalytic cracking unit; wherein the catalyst samples at different positions are collected during the period when the failure occurs; judging the type of crushing according to the apparent morphology of the catalyst in the scanning electron microscope image; judging whether the catalytic cracking unit has failed according to the type of crushing; if the catalytic cracking unit has failed, judging the location of the catalyst crushing failure source according to the average particle size in the catalyst particle size distribution curve of the catalyst samples at different positions and the fine powder content in the catalyst sample.

[0067] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0068] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for identifying the source of catalyst breakage failure in a catalytic cracking unit, characterized in that: include: Obtaining catalyst particle size distribution curves and scanning electron microscope images of catalyst samples at different positions in the catalytic cracking unit; wherein the catalyst samples at different positions are collected during the period when the fault occurs; Determine the type of breakage based on the apparent morphology of the catalyst in the scanning electron microscope image; According to the type of crushing, determining whether the catalytic cracking unit fails; If the catalytic cracking unit fails, the location of the catalyst breakage failure source is determined based on the average particle size in the catalyst particle size distribution curve of the catalyst samples at different positions and the fine powder content in the catalyst samples.

2. The method for identifying the source of catalyst breakage fault in a catalytic cracking unit according to claim 1, characterized in that: The step of judging whether the catalytic cracking unit fails according to the type of the fragmentation includes: If the crushing type is the type of crushing first and then wearing, the catalytic cracking unit fails.

3. The method for identifying the source of catalyst breakage fault in a catalytic cracking unit according to claim 2, characterized in that: The method further comprises: If the breakage type of the catalyst sample is any one or more of the wear type, the breakage type, the catalytic cracking unit has not failed.

4. The method for identifying the source of catalyst breakage fault in a catalytic cracking unit according to claim 1, characterized in that: If the catalytic cracking unit fails, the location of the catalyst breakage failure source is determined based on the average particle size of the catalyst sample and the fine powder content in the catalyst sample, including: Among the catalyst samples at different positions, the position of the catalyst sample with the largest average particle size and the least fine powder content is selected as the position of the catalyst breakage fault source; wherein the position of the catalyst breakage fault source is one of the reactor and the regenerator.

5. The method for identifying the source of catalyst breakage fault in a catalytic cracking unit according to claim 1, characterized in that: The step of obtaining catalyst particle size distribution curves and scanning electron microscope images of catalyst samples at different positions in the catalytic cracking unit includes: Analyzing the catalyst sample by a laser particle size analyzer to obtain the catalyst particle size distribution curve; The scanning electron microscope image of the catalyst sample is obtained using a scanning electron microscope.

6. The method for identifying the source of catalyst breakage fault in a catalytic cracking unit according to any one of claims 1 to 5, characterized in that: The particle size of the fine powder is less than 40㎛.

7. The method for identifying the source of catalyst breakage fault in a catalytic cracking unit according to any one of claims 1 to 5, characterized in that: The catalyst sample comprises at least one of an equilibrium catalyst, a spent catalyst and three-rotation fine powder.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the method for identifying a catalyst crushing fault source in a catalytic cracking unit according to any one of claims 1 to 7 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for identifying a catalyst crushing fault source in a catalytic cracking unit according to any one of claims 1 to 7 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method for identifying a catalyst crushing fault source in a catalytic cracking unit according to any one of claims 1 to 7 is implemented.

Images