Low-noise vacuumizing, agent adding, dust removing and filtering system for catalytic cracking unit
By designing a low-noise vacuum extraction and additive automatic dust removal filter system, using technical means such as guide plates, dust removal filters and sound insulation cotton, the problem of dust and noise pollution in the vacuum filling process of the catalyst is solved, and the effects of noise reduction, convenient maintenance and cost control are achieved.
Patent Information
- Application Number
- CN202311647301.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-04
- Publication Date
- 2025-06-06
AI Technical Summary
The catalytic cracking device has problems of dust pollution and noise pollution during the vacuum filling process of the catalyst, and the existing technology transformation solutions have defects such as high cost, large transformation amplitude, and unsolved noise problems.
A low-noise vacuum additive automatic dust removal filter system is designed. By setting up a guide plate, the sound of the steam injector is spread far away from the factory boundary. A dust removal filter is used to prevent the catalyst from being discharged directly into the atmosphere. A dust removal filter and a catalyst tank are independently set up to reduce maintenance risks and reduce noise through sound insulation cotton and mufflers.
It effectively solves the problem of dust and noise pollution during the vacuum filling of catalysts in the catalytic cracking device, reduces the impact of noise pollution on the factory area, reduces the risk of maintenance, and reduces the cost of equipment transformation.
Smart Images
Figure CN120094493A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of oil refining and processing, and is a low-noise vacuum pumping, dosing and automatic dust removal and filtering system for a catalytic cracking device. Background Art
[0002] Catalytic cracking units widely use vacuuming to add catalysts to catalyst storage tanks. If there is no dust removal facility during the filling process, serious dust pollution will be formed at the outlet of the steam ejector. At the same time, due to the operating characteristics of the steam ejector, a certain steam flow must be ensured to enter the throat of the steam ejector to achieve the vacuuming effect. High-speed steam flow inevitably causes noise pollution during the vacuuming process. In order to reduce dust and noise pollution during vacuuming and dosing of catalytic cracking units, it is necessary to modify the vacuuming system.
[0003] The 800,000 tons / year catalytic cracking unit was retrofitted with vacuum pumping and dosing. The unit is close to residential areas and factory boundaries. There is noise nuisance to residents during the vacuum pumping and dosing process, and the noise level at the factory boundary exceeds the standard. In addition, the vacuum pumping and dosing system assists the reverse regeneration system in unloading the agent during the shutdown phase of the unit. While ensuring the dust removal effect, the vacuum pumping and dosing system is required to have low operating noise, low failure rate, small on-site changes, and withstand operation in high temperature environments.
[0004] At present, there are two technological forms to solve the dust pollution of catalytic cracking vacuum dosing system. One is to open a hole on the top of the catalyst tank manually and put the filter inside. The filter is built into the catalyst tank. Although the structure of this setting is simple, in order to ensure multiple catalyst storage tanks, each tank needs to be installed with a filter. The filter element, as the core filter element, needs to be wear-resistant in the process and cooperate with the catalytic device to shut down and unload the agent. It needs to withstand a temperature greater than 400°C. The increase of the filter leads to increased costs. If the manhole on the top of the catalyst tank is small, it will increase the difficulty of starting the construction of the tank body. In addition, there is a risk of tools and parts falling into the tank and damaging the dosing equipment during the maintenance process. In addition, the scheme does not consider the noise problem of the steam ejector. After the filter is built in, the sedimentation height of the catalyst fine powder in the tank is reduced in disguise, resulting in a rapid increase in the pressure drop of the filter. Repeated soot blowing cannot guarantee the operation effect of the filter. In order to ensure the effective filtering area, the manhole of the catalyst tank needs to be greater than 900mm. The manhole of the general tank cannot meet this requirement. The modification process requires the expansion of the manhole of the tank, and the modification range is large.
[0005] The other is to cancel the steam ejector and replace it with positive pressure delivery. The pressure delivery form is added with a catalytic cracking catalyst process, and the steam ejector is cancelled. This form has the advantage of low noise, but the transformation content is large, more equipment is added, and the operation and maintenance costs of the wind turbine dynamic equipment are increased. In addition, when the catalytic device is shut down, the steam ejector needs to be activated to assist the reverse regeneration system in unloading the agent. Summary of the invention
[0006] The present invention provides a low-noise vacuuming and adding automatic dust removal and filtering system for a catalytic cracking unit, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problems of dust pollution and noise pollution in the vacuuming and catalyst adding process of the existing catalytic cracking unit.
[0007] The technical solution of the present invention is achieved through the following measures: a low-noise vacuum dosing automatic dust removal and filtration system for a catalytic cracking unit, comprising a first catalyst tank, a dust removal filter and a steam ejector, the feed port of the dust removal filter is fixedly connected with a first feed pipeline, the discharge port of the dust removal filter and the inlet of the first catalyst tank are fixedly connected with a second feed pipeline, the outlet of the first catalyst tank and the backwash inlet of the dust removal filter are fixedly connected with a first pipeline, the backwash outlet of the dust removal filter and the injected fluid inlet of the steam ejector are fixedly connected with a second pipeline, the working fluid inlet of the steam ejector is fixedly connected with a steam pipeline, the mixed fluid outlet of the steam ejector is installed with a guide plate, the first pipeline is installed with a first valve, and the second feed pipeline is installed with a second valve.
[0008] The following are further optimizations and / or improvements to the above technical solutions: The above may also include a second catalyst tank, a first cyclone separator and a second cyclone separator, a third pipe is fixedly connected between the outlet of the first catalyst tank and the inlet of the first cyclone separator, a fourth pipe is fixedly connected between the outlet of the first cyclone separator and the inlet of the second cyclone separator, the first pipe is fixedly connected between the outlet of the second cyclone separator and the backblowing inlet of the dust filter, a fifth pipe is fixedly connected between the first pipe corresponding to the position between the first valve and the backblowing inlet of the dust filter and the outlet of the second catalyst tank, and a third valve is installed on the fifth pipe.
[0009] The above may also include an air buffer tank, the first feed pipeline is fixedly connected between the feed inlet of the dust removal filter and the outlet of the air buffer tank, the inlet of the air buffer tank is fixedly connected to the third feed pipeline, and the third feed pipeline is installed with a feed valve.
[0010] The outside of the steam ejector, the outside of the dust removal filter and the outside of the air buffer tank may be covered with sound insulation cotton.
[0011] The mixed fluid outlet of the steam ejector may be fixedly mounted with a muffler, and the guide plate may be fixedly mounted on the muffler outlet.
[0012] A fourth valve may be installed on the steam pipe, a fifth valve may be installed on the second pipe, a vent pipe may be fixedly connected to the top of the first catalyst tank, a safety valve may be installed on the vent pipe, and a sixth valve may be installed on the vent pipe between the safety valve and the first catalyst tank.
[0013] The present invention has a reasonable and compact structure and is easy to use. By arranging a guide plate, the sound at the mixed fluid outlet of the steam ejector can be propagated away from the factory boundary, thereby avoiding excessive noise at the factory boundary. By arranging a dust removal filter, it can avoid environmental pollution caused by the first catalyst tank directly discharging the catalyst into the atmosphere during the vacuum operation. By arranging the first pipeline, the dust removal filter and the first catalyst tank are independently arranged, thereby avoiding the risk of tools and parts falling into the first catalyst tank during the maintenance process, facilitating the maintenance operation, and facilitating the flexible adjustment of the process and the disassembly, inspection and replacement of the dust removal filter element. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Attached Figure 1 It is a schematic diagram of the front half-section structure of the first embodiment.
[0015] The codes in the accompanying drawings are: 1 is the first catalyst tank, 2 is the dust filter, 3 is the steam ejector, 4 is the first pipeline, 5 is the first valve, 6 is the second pipeline, 7 is the steam pipeline, 8 is the guide plate, 9 is the first feed pipeline, 10 is the second feed pipeline, 11 is the second valve, 12 is the second catalyst tank, 13 is the first cyclone separator, 14 is the second cyclone separator, 15 is the third pipeline, 16 is the fourth pipeline, 17 is the fifth pipeline, 18 is the third valve, 19 is the air buffer tank, 20 is the third feed pipeline, 21 is the feed valve, 22 is the muffler, 23 is the fourth valve, 24 is the fifth valve, 25 is the vent pipe, 26 is the safety valve, and 27 is the sixth valve. DETAILED DESCRIPTION
[0016] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.
[0017] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.
[0018] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As shown in the attached Figure 1As shown, the low-noise vacuum dosing automatic dust removal and filtration system of the catalytic cracking unit includes a first catalyst tank 1, a dust removal filter 2 and a steam ejector 3. The feed port of the dust removal filter 2 is fixedly connected with a first feed pipeline 9, the discharge port of the dust removal filter 2 and the inlet of the first catalyst tank 1 are fixedly connected with a second feed pipeline 10, the outlet of the first catalyst tank 1 and the backflush inlet of the dust removal filter 2 are fixedly connected with a first pipeline 4, the backflush outlet of the dust removal filter 2 and the injected fluid inlet of the steam ejector 3 are fixedly connected with a second pipeline 6, the working fluid inlet of the steam ejector 3 is fixedly connected with a steam pipeline 7, the mixed fluid outlet of the steam ejector 3 is installed with a guide plate 8, the first pipeline 4 is installed with a first valve 5, and the second feed pipeline 10 is installed with a second valve 11.
[0019] According to the requirements, the dust filter 2 is an existing well-known technology. The filter element of the dust filter 2 is made of a stainless steel braided filter element, which meets the high-temperature abrasive operating environment. The discharge port is located at the lower end of the dust filter 2, and the back-blowing inlet is located between the filter cartridge and the discharge port of the dust filter 2. During use, by setting the guide plate 8, the sound at the outlet of the mixed fluid of the steam ejector 3 can be propagated away from the factory boundary to avoid excessive noise at the factory boundary. By setting the dust filter 2, the environmental pollution caused by the catalyst directly discharged into the atmosphere by the first catalyst tank 1 during the vacuum operation can be avoided. By setting the first pipeline 4, the dust filter 2 and the first catalyst tank 1 are set independently to avoid the first catalyst tank 1 from being expanded and remodeled as a manhole, and the risk of tools and parts falling into the first catalyst tank 1 during the maintenance process is avoided, and the normal operation of the process system is avoided. It is convenient for maintenance operations, and it is convenient for the flexible adjustment of the process and the disassembly, inspection and replacement of the filter element of the dust filter 2. At the same time, the filter cartridge of the dust filter 2 does not occupy the sedimentation height of the catalyst in the first catalyst tank 1, and the pressure drop increase in the dust filter 2 is reduced.
[0020] The above-mentioned low-noise vacuum dosing automatic dust removal and filtration system of the catalytic cracking unit can be further optimized and / or improved according to actual needs: Embodiment 2: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, it also includes a second catalyst tank 12, a first cyclone separator 13 and a second cyclone separator 14. A third pipe 15 is fixedly connected between the outlet of the first catalyst tank 1 and the inlet of the first cyclone separator 13, a fourth pipe 16 is fixedly connected between the outlet of the first cyclone separator 13 and the inlet of the second cyclone separator 14, the first pipe 4 is fixedly connected between the outlet of the second cyclone separator 14 and the backblowing inlet of the dust filter 2, and a fifth pipe 17 is fixedly connected between the first pipe 4 corresponding to the position between the first valve 5 and the backblowing inlet of the dust filter 2 and the outlet of the second catalyst tank 12, and a third valve 18 is installed on the fifth pipe 17.
[0021] According to the requirements, the second catalyst tank 12, the fifth pipeline 17 and the third valve 18 can be multiple, so that multiple catalyst tanks share one dust filter 2, reducing the equipment modification cost. During use, by setting the first cyclone separator 13 and the second cyclone separator 14, when the first catalyst tank 1 and the second catalyst tank 12 are vacuumed, the catalyst in the first catalyst tank 1 and the second catalyst tank 12 can be sent to the dust filter 2 for filtration and then discharged, reducing the pollution caused by the catalyst emission to the environment. By setting the third valve 18, the dosing and vacuuming operations between the first catalyst tank 1 and the second catalyst tank 12 are facilitated.
[0022] Embodiment 3: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, it also includes an air buffer tank 19, the first feed pipeline 9 is fixedly connected between the feed inlet of the dust removal filter 2 and the outlet of the air buffer tank 19, the inlet of the air buffer tank 19 is fixedly connected to the third feed pipeline 20, and the third feed pipeline 20 is installed with a feed valve 21.
[0023] During use, by setting up the air buffer tank 19, the speed at which fresh catalyst enters the dust filter 2 can be reduced, preventing fresh catalyst from accumulating in the filter cartridge of the dust filter 2. This can increase the rate at which fresh catalyst is injected into the first catalyst tank 1 and the second catalyst tank 12, preventing the pressure drop of the dust filter 2 from increasing too quickly and causing shutdown.
[0024] Embodiment 4: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, the outside of the steam ejector 3, the outside of the dust filter 2 and the outside of the air buffer tank 19 are all coated with sound insulation cotton. According to the needs, the outside of the first feed pipe 9, the outside of the second feed pipe 10 and the outside of the second pipe 6 are all coated with sound insulation cotton. During use, by setting the sound insulation cotton, the noise when the first catalyst tank 1 and the second catalyst tank 12 are vacuumed can be reduced, and the noise pollution to residents near the factory area can be reduced.
[0025] Embodiment 5: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, a muffler 22 is fixedly installed at the outlet of the mixed fluid of the steam ejector 3, and a guide plate 8 is fixedly installed at the outlet of the muffler 22. During use, the noise at the outlet of the mixed fluid of the steam ejector 3 can be reduced by setting the muffler 22, and the guide plate 8 is fixedly installed between the outlet of the muffler 22 and the factory boundary, so that the sound at the outlet of the muffler 22 can be propagated away from the factory boundary, thereby avoiding excessive noise at the factory boundary.
[0026] Embodiment 6: As an optimization of the above embodiment, as shown in the attached Figure 1As shown, a fourth valve 23 is installed on the steam pipe 7, a fifth valve 24 is installed on the second pipe 6, a vent pipe 25 is fixedly connected to the upper part of the first catalyst tank 1, a safety valve 26 is installed on the vent pipe 25, and a sixth valve 27 is installed on the vent pipe 25 at a position corresponding to the safety valve 26 and the first catalyst tank 1.
[0027] During use, by setting the fourth valve 23 and the fifth valve 24, the flow rate of steam in the working fluid inlet of the steam ejector 3 can be adjusted, thereby adjusting the negative pressure of the dust filter 2, so that the vacuum operation of the first catalyst storage tank and the second catalyst storage tank can be carried out normally, and the noise at the mixed fluid outlet of the steam ejector 3 can be avoided from affecting the normal life of residents near the factory.
[0028] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.
[0029] The use process of the best embodiment of the present invention: The first step is to open the first valve 5, the third valve 18, the fourth valve 23 and the fifth valve 24; In the second step, steam is introduced into the steam pipe 7, and the steam enters the working fluid inlet of the steam ejector 3 to form a suction effect on the first catalyst tank 1 and the second catalyst tank 12, so that negative pressure is formed in the first catalyst tank 1 and the second catalyst tank 12. After the negative pressure in the first catalyst tank 1 and the second catalyst tank 12 reaches a set value, the first valve 5 and the third valve 18 are closed, and then the steam injection is stopped, and then the fourth valve 23 and the fifth valve 24 are closed; The third step is to connect the third feed pipeline 20 to the equipment storing fresh catalyst, open the second valve 11, the feed valve 21 and the third valve 18, and the fresh catalyst is sucked into the negative pressure in the first catalyst tank 1 and the second catalyst tank 12, and the fresh catalyst is filtered after passing through the dust filter 2; if the pressure drop of the dust filter 2 is greater than the set value, stop injecting the catalyst, close the feed valve 21, repeat the first step, and introduce steam into the steam pipe 7 again to backflush the dust filter 2.
Claims
1. A low-noise vacuum dosing automatic dust removal and filtration system for catalytic cracking units. Features It includes a first catalyst tank, a dust removal filter and a steam ejector, wherein the feed port of the dust removal filter is fixedly connected to the first feed pipeline, the discharge port of the dust removal filter and the inlet of the first catalyst tank are fixedly connected to the second feed pipeline, the outlet of the first catalyst tank and the backblowing inlet of the dust removal filter are fixedly connected to the first pipeline, the backblowing outlet of the dust removal filter and the injected fluid inlet of the steam ejector are fixedly connected to the second pipeline, the working fluid inlet of the steam ejector is fixedly connected to the steam pipeline, the mixed fluid outlet of the steam ejector is installed with a guide plate, the first pipeline is installed with a first valve, and the second feed pipeline is installed with a second valve.
2. The low-noise vacuum dosing automatic dust removal and filtration system for catalytic cracking unit according to claim 1, Features It also includes a second catalyst tank, a first cyclone separator and a second cyclone separator. A third pipe is fixedly connected between the outlet of the first catalyst tank and the inlet of the first cyclone separator, a fourth pipe is fixedly connected between the outlet of the first cyclone separator and the inlet of the second cyclone separator, the first pipe is fixedly connected between the outlet of the second cyclone separator and the backblowing inlet of the dust filter, a fifth pipe is fixedly connected between the first pipe corresponding to the position between the first valve and the backblowing inlet of the dust filter and the outlet of the second catalyst tank, and a third valve is installed on the fifth pipe.
3. The low-noise vacuum dosing automatic dust removal and filtration system for catalytic cracking unit according to claim 1 or 2, Features It also includes an air buffer tank. The first feed pipeline is fixedly connected between the feed inlet of the dust removal filter and the outlet of the air buffer tank. The inlet of the air buffer tank is fixedly connected to the third feed pipeline. The third feed pipeline is equipped with a feed valve.
4. The low-noise vacuum dosing automatic dust removal and filtration system for catalytic cracking unit according to claim 3, Features The outside of the steam ejector, the outside of the dust filter and the outside of the air buffer tank are all covered with sound insulation cotton.
5. The low-noise vacuum dosing automatic dust removal and filtration system for a catalytic cracking unit according to claim 1, 2 or 4, Features A muffler is fixedly installed at the mixed fluid outlet of the steam ejector, and a guide plate is fixedly installed at the muffler outlet.
6. The low noise vacuum dosing automatic dust removal and filtration system for catalytic cracking unit according to claim 3, Features A muffler is fixedly installed at the mixed fluid outlet of the steam ejector, and a guide plate is fixedly installed at the muffler outlet.
7. The low-noise vacuum dosing automatic dust removal and filtration system for a catalytic cracking unit according to claim 1, 2, 4 or 6, Features A fourth valve is installed on the steam pipe, a fifth valve is installed on the second pipe, a vent pipe is fixedly connected to the top of the first catalyst tank, a safety valve is installed on the vent pipe, and a sixth valve is installed on the vent pipe between the safety valve and the first catalyst tank.
8. The low-noise vacuum dosing automatic dust removal and filtration system for catalytic cracking unit according to claim 3, Features A fourth valve is installed on the steam pipe, a fifth valve is installed on the second pipe, a vent pipe is fixedly connected to the top of the first catalyst tank, a safety valve is installed on the vent pipe, and a sixth valve is installed on the vent pipe between the safety valve and the first catalyst tank.
9. The low-noise vacuum dosing automatic dust removal and filtration system for catalytic cracking unit according to claim 5, Features A fourth valve is installed on the steam pipe, a fifth valve is installed on the second pipe, a vent pipe is fixedly connected to the top of the first catalyst tank, a safety valve is installed on the vent pipe, and a sixth valve is installed on the vent pipe between the safety valve and the first catalyst tank.