Intelligent centralized purification equipment for fire-resistant oil

Abstract

The invention relates to the technical field of fire-resistant oil purification equipment, and discloses fire-resistant oil centralized purification intelligent equipment which comprises a crude oil storage unit, a dehydration unit, a regeneration unit, a filtering unit, a finished oil storage unit, an online monitoring unit and a control unit. Branch oil pipes are connected between the dehydration unit, the regeneration unit, the filtering unit and the finished oil storage unit and the main oil pipe; a shunt three-way valve is connected between each branch oil pipe and the main oil pipe; oil passing pipes are connected between the dehydration unit and the regeneration unit, between the regeneration unit and the filtering unit and between the filtering unit and the product oil storage unit, oil return pipes are connected between the oil passing pipes and the main oil pipe, and oil return three-way valves are connected between the oil return pipes and the oil passing pipes; and the online monitoring unit, the shunting three-way valve and the oil return three-way valve are all in signal connection with the control unit. The invention solves the problems of poor pertinence, low efficiency and high cost in the online purification process of fire-resistant oil in the prior art.

Description

Technical Field

[0001] This invention relates to the field of fire-resistant oil purification equipment technology, specifically to a centralized intelligent fire-resistant oil purification device. Background Technology

[0002] Fire-resistant oil (phosphate ester fire-resistant fluid) is a type of fire-resistant hydraulic oil widely used in power plant EH oil systems, nuclear power plants, and large-capacity steam turbine generator sets. As the working medium of hydraulic speed control systems, the stability and reliability of phosphate ester fire-resistant oil directly affect the operating efficiency and lifespan of the speed control system. During long-term use, phosphate ester fire-resistant oil is easily affected by various factors such as hydrolysis and oxidation, leading to problems such as oil quality deterioration, increased acid value, decreased resistivity, and increased moisture content. This seriously affects the operational safety and economic benefits of hydraulic speed control systems. Among these factors, acid content, water content, and particle size are the most important factors affecting the quality of fire-resistant oil.

[0003] To ensure the quality of fire-resistant oil during use, the current standard practice is to periodically sample and test the oil. When the test results show that the oil quality is substandard, the oil is purified and then tested again until it meets the standards. While this method allows for timely purification when quality issues are detected, it is highly dependent on a periodic testing schedule. For example, some power plants conduct tests monthly or every few months. If quality problems with the fire-resistant oil are not detected in time, it will affect the normal operation of the speed control system. Furthermore, periodic sampling and testing require sending samples to a laboratory, which also affects the timeliness of the testing.

[0004] To improve the timeliness and accuracy of fire-resistant oil detection, existing technologies include online detection and purification devices. For example, utility model patent CN222173373U discloses an intelligent device for processing the volume resistivity of fire-resistant oil. This device includes a magnetic filter, an oil pump motor, a heater, a purification regenerator, and an electronic flow meter arranged sequentially along the flow direction of the fire-resistant oil. This device can monitor changes in the volume resistivity of the fire-resistant oil in real time and automatically purify and regenerate the fire-resistant oil when the volume resistivity exceeds the standard. It achieves online intelligent detection to a certain extent and purifies the fire-resistant oil in a timely manner when quality problems are detected. However, existing devices have limited automatic detection parameters and a single purification route after detection, making it impossible to perform targeted purification operations on one or more indicators of the fire-resistant oil. This seriously affects the efficiency of fire-resistant oil purification and may result in ineffective purification, increasing purification costs. Therefore, it is necessary to improve existing fire-resistant oil purification equipment to enhance the accuracy and timeliness of online fire-resistant oil detection, improve the accuracy and targeting of the fire-resistant oil purification process, increase purification efficiency, and reduce purification costs. Summary of the Invention

[0005] The present invention aims to provide an intelligent device for centralized purification of fire-resistant oil, so as to solve the problems of poor targeting, low efficiency and high cost in the online purification process of fire-resistant oil in the prior art.

[0006] To solve the above problems, the present invention adopts the following technical solution: a fire-resistant oil centralized purification intelligent device, comprising a crude oil storage unit, a dehydration unit, a regeneration unit, a filtration unit, a finished oil storage unit, an online monitoring unit, and a control unit. A main oil pipe is connected to the crude oil storage unit. Oil distribution pipes are connected between the dehydration unit, the regeneration unit, the filtration unit, the finished oil storage unit, and the main oil pipe. A diversion three-way valve is connected between the oil distribution pipe and the main oil pipe. Oil passing pipes are connected between the dehydration unit and the regeneration unit, between the regeneration unit and the filtration unit, and between the filtration unit and the finished oil storage unit. A return oil pipe is connected between the oil passing pipe and the main oil pipe. A return oil three-way valve is connected between the return oil pipe and the oil passing pipe. The online monitoring unit, the diversion three-way valve, and the return oil three-way valve are all signal-connected to the control unit.

[0007] The principle of this application is as follows: In this application, the crude oil storage unit is used to store the fire-resistant oil to be tested and purified; the dehydration unit is used to remove water from the fire-resistant oil; the regeneration unit is used to reduce the acid value and increase the resistivity of the fire-resistant oil; the filtration unit is used to filter and remove particulate impurities from the fire-resistant oil; and the refined oil storage unit is used to store the purified fire-resistant oil. The online monitoring unit is connected to all other units (i.e., the online monitoring unit is simultaneously connected to the crude oil storage unit, the dehydration unit, the regeneration unit, the filtration unit, and the refined oil storage unit). The online monitoring unit is used to monitor the acid value, water content, and particle size of the fire-resistant oil to obtain monitoring parameters. The monitoring parameters are compared and analyzed with standard thresholds to determine which purification operations are required for the fire-resistant oil. Then, the control unit controls the opening or closing of the diversion three-way valve and the return three-way valve to put one or more of the dehydration unit, the regeneration unit, and the filtration unit into the oil supply working state, selectively completing the regeneration, dehydration, or filtration operations of the fire-resistant oil.

[0008] Meanwhile, the online monitoring unit in this application is connected to various units, enabling it not only to monitor various indicators of the fire-resistant oil within the crude oil storage unit, thus determining the appropriate purification method to ensure precise and efficient purification, but also to connect with other dehydration, regeneration, and filtration units. This allows for targeted testing of the fire-resistant oil's purification effect, ensuring ideal results after each purification and effectively guaranteeing the purification outcome. In particular, the online monitoring unit is connected to the refined oil storage unit, enabling it to perform final testing on the purified fire-resistant oil stored there, verifying whether all indicators are up to standard and preventing incompletely purified fire-resistant oil from being put into use.

[0009] In this application, for example, when the online monitoring unit detects that the fire-resistant oil only needs regeneration, the control unit controls the opening of the diversion three-way valve on the diversion pipe between the regeneration unit and the main flow pipe, so that the fire-resistant oil in the main flow pipe can enter the regeneration unit through the corresponding diversion pipe. The regeneration unit regenerates the fire-resistant oil, reducing its acid value and increasing its resistivity. Then, the control unit controls the switching of the return three-way valve on the oil passage between the regeneration unit and the filter unit, so that the corresponding oil passage connects between the main oil pipe and the return oil pipe. At this time, the fire-resistant oil regenerated by the regeneration unit flows back to the main oil pipe. Finally, the control unit controls the switching of the return three-way valve on the oil passage between the filter unit and the finished oil storage unit, so that the corresponding oil passage connects between the main oil pipe and the finished oil storage unit, so that the regenerated fire-resistant oil flows into the finished oil storage unit for storage through the main oil pipe, the corresponding return oil pipe, and the corresponding oil passage, thus completing the regeneration treatment of the fire-resistant oil.

[0010] For example, when the online monitoring unit detects that the fire-resistant oil needs regeneration and filtration, the control unit opens the three-way valve on the branch pipe between the regeneration unit and the main flow pipe, allowing the fire-resistant oil in the main flow pipe to enter the regeneration unit through the corresponding branch pipe. The regeneration unit regenerates the fire-resistant oil, reducing its acid value and increasing its resistivity. Then, the control unit switches the return three-way valve on the oil passage between the regeneration unit and the filtration unit, connecting the corresponding oil passage between the regeneration unit and the filtration unit. At this time, the fire-resistant oil, after being regenerated by the regeneration unit, flows into the filtration unit through the corresponding oil passage, where the filtration unit filters particulate impurities from the fire-resistant oil. Finally, the control unit switches the return three-way valve on the oil passage between the filtration unit and the finished oil storage unit, connecting the filtration unit and the finished oil storage unit through the corresponding oil passage, allowing the regenerated and filtered fire-resistant oil to flow into the finished oil storage unit for storage, thus completing the targeted regeneration and filtration of the fire-resistant oil.

[0011] The beneficial effects of this application are as follows: 1. Capable of monitoring and purifying multiple indicators of fire-resistant fuel: By setting up a dehydration unit, a regeneration unit and a filtration unit, this application can perform dehydration, regeneration and filtration operations on fire-resistant fuel, effectively reducing the water content in the fire-resistant fuel, lowering the acid value and increasing the resistivity. At the same time, it can also filter out particulate impurities in the fire-resistant fuel, so that the multiple indicators of the fire-resistant fuel are effectively purified and can work stably.

[0012] 2. Online intelligent monitoring capability: Compared with the sampling and testing methods in the existing technology, the present application can realize online monitoring by using an online monitoring unit, which can reduce intermediate time delays and make the detection more efficient; and can automatically select and control the detection time and frequency according to real-time needs, thereby better completing the monitoring and purification.

[0013] 3. More Targeted Purification of Fire-Resistant Oil: Compared to existing technologies that use multiple purification processes with fixed purification routes, fire-resistant oil may only require purification for one or a few specific indicators during actual purification. If the fire-resistant oil is transported for purification along a fixed route, it not only affects the purification efficiency but also causes unnecessary waste in the purification units. This application, through the cooperation of an online monitoring unit and a control unit, allows for targeted selection of purification routes during the actual purification process. This effectively prevents fire-resistant oil from entering unnecessary purification units, significantly improving purification efficiency, reducing unnecessary waste in the purification units, lowering purification costs, and extending equipment lifespan.

[0014] Preferably, as an improvement, a circulation pipe is connected between the finished oil storage unit and the main oil pipe. The end of the circulation pipe away from the finished oil storage unit is located between the crude oil storage unit and the dehydration unit. A circulation pump and a circulation control valve are connected to the circulation pipe.

[0015] In this solution, since the online monitoring unit is connected to the finished oil storage unit, the purified fire-resistant oil in the finished oil storage unit is tested by the online monitoring unit. When the quality of the finished oil is still problematic, the control unit can control the circulation control valve to open, and pump the unqualified fire-resistant oil to the main oil pipe through the circulation pipe. The pumping position is located on the main oil pipe between the crude oil storage unit and the dehydration unit, so that the unqualified fire-resistant oil can be returned to the main oil pipe for circulation and purification. The purification process can be targeted according to the test results of the finished oil storage unit to ensure the high efficiency of the circulation and purification process.

[0016] Preferably, as an improvement, a heating unit is provided between the crude oil storage unit and the dehydration unit, and the heating unit is connected to the main oil pipe.

[0017] In this solution, a heating unit is installed between the original oil storage unit and the dehydration unit, which can heat the crude oil to improve the effects of fire-resistant oil regeneration and filtration.

[0018] Preferably, as an improvement, the online monitoring unit includes an initial comprehensive testing instrument connected to the crude oil storage unit, a trace moisture testing instrument connected to the dehydration unit, an acid value measuring instrument and a volume resistivity sensor connected to the regeneration unit, a particle testing instrument connected to the filtration unit, and a terminal comprehensive testing instrument connected to the finished oil storage unit.

[0019] In this solution, both the initial comprehensive testing instrument and the terminal comprehensive testing instrument can comprehensively test the acid value, volume resistivity, particle size, and moisture content of the fire-resistant fuel. The trace moisture detector is used to detect the moisture content of the fire-resistant fuel after dehydration. The acid value meter and the volume resistivity sensor are used to detect the acid value and volume resistivity of the fire-resistant fuel after regeneration. The particle detector is used to detect the particle size of the fire-resistant fuel after filtration by the filter unit.

[0020] Preferably, as an improvement, the dehydration unit includes a vacuum dehydrator and a condenser connected to the vacuum dehydrator, and a trace moisture detector is connected to the vacuum dehydrator; the regeneration unit includes a regeneration filter cartridge, and the filtration unit includes a granular filter cartridge.

[0021] In this scheme, the vacuum dehydrator uses flash evaporation and other methods to remove moisture from the fire-resistant oil. The removed moisture is condensed and collected in the condenser. The regeneration filter cartridge is used to reduce the acid value and increase the resistivity of the fire-resistant oil. A molecular polar adsorbent can be placed in the regeneration filter cartridge. When the fire-resistant oil is pressurized and passes through the regeneration filter cartridge containing the adsorbent, the regeneration process is completed, thereby reducing the acid value and increasing the resistivity. The particulate filter cartridge is used to filter and remove particulate impurities in the fire-resistant oil.

[0022] Preferably, as an improvement, the number of both the regeneration filter cartridge and the particulate filter cartridge is at least two. Adjacent regeneration filter cartridges are connected by a regeneration series pipe, and a regeneration return pipe is connected between the regeneration series pipe and the main oil pipe. A regeneration three-way valve is connected between the regeneration return pipe and the regeneration series pipe. Adjacent particulate filter cartridges are connected by a filter series pipe, and a filter return pipe is connected between the filter series pipe and the main oil pipe. A filter three-way valve is connected between the filter return pipe and the filter series pipe. Both the regeneration three-way valve and the filter three-way valve are signal-connected to the control unit.

[0023] In this scheme, multiple regeneration filter cartridges and multiple particulate filter cartridges that can be connected in series are set up. In actual use, one or more of them can be selected to be used. For example, during the regeneration process, only one regeneration filter cartridge can be used for regeneration, or the regeneration control valve can be controlled to connect the regeneration series pipe between two adjacent regeneration filter cartridges. In this case, the fire-resistant oil can flow through the two regeneration filter cartridges in sequence and be regenerated more thoroughly. Of course, when the adsorption effect of the molecular polar adsorbent in a certain regeneration filter cartridge weakens and needs to be replaced, it is only necessary to control the corresponding regeneration filter cartridge to stop connecting with the main oil pipe and the adjacent regeneration filter cartridges. The remaining regeneration filter cartridges can continue to complete the regeneration process. At this time, the molecular polar adsorbent and other structures in the regeneration filter cartridge can be replaced. Some consumable parts can be replaced without stopping the entire treatment equipment, effectively ensuring the efficiency of fire-resistant oil purification treatment. The principle and effect of setting up multiple particulate filter cartridges are similar, and will not be elaborated here.

[0024] Preferably, as an improvement, both the regeneration filter cartridge and the particle filter cartridge include a sleeve and a filter element assembly coaxially connected within the sleeve. The filter element assembly includes an outer filter screen, a middle filter section, and an inner filter screen arranged vertically and coaxially from the outside to the inside. An outer upper sealing end plate and an outer lower sealing end plate are fixedly connected to both ends of the outer filter screen, and an inner upper sealing end plate and an inner lower sealing end plate are fixedly connected to both ends of the inner filter screen. The middle filter section is fixedly connected to the outside of the inner filter screen. A cleaning component is slidably connected to the outside of the outer filter screen. A spray component facing the middle filter section is connected to the outer upper sealing end plate. A vertical drive mechanism for driving the inner upper sealing end plate to slide vertically is connected to the sleeve. A linkage component is connected between the cleaning component and the inner upper sealing end plate.

[0025] In this solution, both the regeneration filter cartridge and the particulate filter cartridge are configured as sleeves with coaxial filter element assemblies within the sleeves. During use, if the regeneration or filtration effect is unsatisfactory, the filter element assembly can be directly replaced for quick replacement. Furthermore, the filter element assembly in this solution includes an outer filter screen, an intermediate filter section, and an inner filter screen. In practical applications, for the regeneration filter cartridge, the intermediate filter section can be equipped with a molecular polar adsorbent; for the particulate filter cartridge, the intermediate filter section can use filter materials such as glass fiber, glass fiber filter paper, resin, or diatomaceous earth. While ensuring the regeneration and filtration effects of the corresponding regeneration and filtration units, the outer and inner filter screens not only serve as supporting and protective components for the intermediate filter section but also play an auxiliary filtration role, resulting in better regeneration and filtration effects for the fire-resistant oil.

[0026] Furthermore, this solution allows for cleaning / washing of the filter element assembly when the treatment effect of the regenerated filter cartridge and particulate filter cartridge weakens, reducing the frequency of filter element assembly replacement and thus lowering the cost of fire-resistant oil purification. The filter element assembly in this solution includes a vertically coaxially arranged outer filter screen, intermediate filter section, and inner filter screen. When the inner sealing end plate is driven vertically by the drive mechanism, the upper inner sealing end plate drives the inner filter screen, intermediate filter section, and lower inner sealing end plate to slide upwards. The upper inner sealing end plate, through a linkage component, drives the cleaning component to slide upwards relative to the outer filter screen, using the cleaning component to clean the outside of the outer filter screen. Simultaneously, a spray component is installed on the upper outer sealing end plate facing the intermediate filter section. As the intermediate filter section slides upwards with the upper inner sealing end plate, the spray component can spray high-pressure cleaning fluid onto the outside of the intermediate filter section, using the high-pressure cleaning fluid to rinse the outside of the intermediate filter section. The rinsed liquid is located between the intermediate filter section and the outer filter screen. As the height of the intermediate filter section rises, the rinsed liquid flows from the inside to the outside of the outer filter screen, acting as a backwash after the cleaning component cleans the outside of the outer filter screen, improving the rinsing and cleaning effect of the outer filter screen.

[0027] Meanwhile, after the filter element assembly is cleaned / washed, the intermediate filter section and the inner and outer filter screens slide apart, especially the intermediate filter, which is suspended. This facilitates rapid drying of the intermediate filter section after cleaning and prevents it from coming into contact with the high-pressure cleaning fluid and becoming contaminated. Only after all the cleaning fluid has flowed out of the outer filter screen are the intermediate filter section and the inner filter screen reset, effectively ensuring the cleaning / washing effect. Moreover, after the intermediate filter section and the inner filter screen are reset, the spraying component can continue to spray cleaning fluid into the gap between the intermediate filter section and the outer filter screen to specifically backwash the outer filter screen and improve the cleaning effect. In addition, the spraying component can also be used to spray air into the gap between the intermediate filter section and the outer filter screen to accelerate the gas flow rate inside the filter element assembly. The introduced gas can also be appropriately heated to dry the filter element assembly faster and improve the cleaning / washing efficiency.

[0028] Preferably, as an improvement, the linkage mechanism includes a linkage rod, one end of which is fixedly connected to the inner upper sealing end plate and the other end of which is fixedly connected to the cleaning collar. The linkage rod is multiple and arranged circumferentially along the inner upper sealing end plate. The spraying assembly includes a high-pressure nozzle with its spray end inclined downward toward the central axis of the outer filter screen. The high-pressure nozzle is multiple and arranged circumferentially along the outer upper sealing end plate.

[0029] In this solution, the linkage mechanism adopts a linkage rod, which is not only convenient to arrange, but also allows for easy and stable pushing and pulling of the cleaning component relative to the outer side of the outer filter screen to complete the cleaning work of the outer filter screen. At the same time, the spraying component includes multiple high-pressure nozzles. The cleaning fluid sprayed by the high-pressure spray group can clean the outer side of the intermediate filter section. The high-pressure spray group is inclined downward towards the central axis of the outer filter screen to reduce the splashing of cleaning fluid during high-pressure cleaning. At the same time, it can make the cleaning fluid flow downward quickly and collect after cleaning, improving the cleaning effect of the intermediate filter section.

[0030] Preferably, as an improvement, the cleaning assembly includes a cleaning collar sleeved on the outside of the outer filter screen, the cleaning collar having a vertically penetrating dirt passage groove, and the outer lower sealing end plate having a vertically penetrating drain groove.

[0031] In this design, when the cleaning ring slides vertically relative to the outer wall of the outer filter screen, it can scrape off particulate impurities from the outside of the outer filter screen, effectively cleaning the outer wall of the outer filter screen. Combined with the cleaning of the intermediate filter section, this allows the entire filter element assembly to better restore its filtration effect and better complete the regeneration and filtration of fire-resistant oil. In addition, a dirt passage groove is opened on the cleaning ring, and a drain groove is opened on the lower outer sealing end plate, so that the dirt scraped off by the cleaning ring on the outer filter screen can pass downward through the dirt passage groove and the drain groove into the bottom of the sleeve, and finally be removed from the bottom of the sleeve.

[0032] Preferably, as an improvement, a blocking collar is fixedly connected to the inner lower sealing end plate. The blocking collar is located between the outer filter screen and the inner filter screen, and the height of the top of the blocking collar is higher than the height of the top of the cleaning collar.

[0033] In this design, a blocking collar is fixed on the inner lower sealing end plate. The height of the top of the blocking collar is higher than the height of the top of the cleaning collar. When the cleaning collar and the blocking collar slide upward synchronously with the inner upper sealing end plate, the height of the top of the blocking collar is always higher than the height of the top of the cleaning collar. Thus, during the cleaning process of the cleaning collar scraping the outer wall of the outer filter screen, the blocking collar can block the cleaning collar from the inside of the outer filter screen, reducing the situation where particulate impurities are squeezed into the outer filter screen when the cleaning collar scrapes them. Moreover, the blocking collar can also play an auxiliary role in cleaning the inner wall of the outer filter screen, thereby making the cleaning of the outer filter screen more thorough. Attached Figure Description

[0034] Figure 1 This is a process flow diagram of a fire-resistant oil centralized purification intelligent device according to Embodiment 1 of the present invention.

[0035] Figure 2 This is a process flow diagram of the connection of multiple regeneration filter cartridges and granular filter cartridges in Embodiment 1 of the present invention.

[0036] Figure 3 This is a schematic diagram of the connection between the two regeneration filter cartridges and the granular filter cartridge in Embodiment 1 of the present invention (connection pipelines, etc. are not shown).

[0037] Figure 4 This is a schematic diagram showing the connection of the base, driver, drive disk, and guide disk in Embodiment 1 of the present invention.

[0038] Figure 5 This is a schematic diagram of the connection between the sleeve and the filter element assembly in Embodiment 1 of the present invention.

[0039] Figure 6 for Figure 5 A cross section.

[0040] Figure 7 for Figure 6 A magnified view of a portion of point A in the middle.

[0041] Figure 8 for Figure 5 A diagram showing the concealed sleeve.

[0042] Figure 9 for Figure 5 A diagram showing another perspective after the sleeve is hidden.

[0043] Figure 10 for Figure 8 A diagram showing the external filter after it has been concealed.

[0044] Figure 11 for Figure 10 A schematic diagram showing the process after hiding the intermediate filter section.

[0045] Figure 12 This is a process flow diagram of a fire-resistant oil centralized purification intelligent device according to Embodiment 2 of the present invention.

[0046] Figure 13 This is a cross-sectional view of the connection between the sleeve and the filter element assembly in Embodiment 3 of the present invention.

[0047] Figure 14 for Figure 13 A magnified view of a section at point B. Detailed Implementation

[0048] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: crude oil storage unit 1, dehydration unit 2, vacuum dehydrator 201, condenser 202, regeneration unit 3, regeneration filter cartridge 301, filtration unit 4, particle filter cartridge 401, finished oil storage unit 5, control unit 6, dehydration oil distribution pipe 7, regeneration oil distribution pipe 8, filtration oil distribution pipe 9, finished oil distribution pipe 10, dehydration flow three-way valve 11, regeneration flow three-way valve 12, filtration flow three-way valve 13, dehydration oil passage pipe 14, regeneration oil passage pipe 15, filtration oil passage pipe 16, dehydration return oil three-way valve 17, regeneration return oil three-way valve 18, filtration return oil three-way valve 19, initial comprehensive detector 20, trace moisture detector 21, acid value meter 22, volume resistivity sensor 23, particle detector 24, terminal comprehensive detector 25, circulation pipe 26, circulation pump 27, circulation control valve 28, regeneration series pipe 29. 30. Regeneration return pipe; 31. Regeneration three-way valve; 32. Filter series pipe; 33. Filter return pipe; 34. Filter three-way valve; 35. Sleeve; 35. Outer flange; 3501. Inner flange; 3502. Outer filter screen; 36. Intermediate filter section; 37. Inner filter screen; 38. Oil inlet port; 39. Outer upper sealing end plate; 40. Outer upper convex ring; 4001. Outer lower sealing end plate; 4101. Drain trough; 42. Inner upper sealing end plate; 4201. Inner upper convex ring. Oil outlet 4202, inner lower sealing end plate 43, cleaning collar 44, sludge passage groove 4401, sealing plate 45, linkage rod 46, high pressure nozzle 47, driver 48, drive rod 49, base 50, vertical support 51, guide plate 52, drive plate 53, pull rod 54, heating unit 55, blocking collar 56, main oil pipe 10000, oil inlet pipe 10001, main oil pump 10002, oil outlet pipe 10003.

[0049] Example 1 This embodiment is as shown in the appendix. Figure 1As shown: A fire-resistant oil centralized purification intelligent device includes a crude oil storage unit 1, a dehydration unit 2, a regeneration unit 3, a filtration unit 4, a finished oil storage unit 5, an online monitoring unit, and a control unit 6. The crude oil storage unit 1 is connected to an inlet pipe 10001 and a main oil pipe 10000. A main oil pump 10002 is installed at the end of the main oil pipe 10000 near the crude oil storage unit 1. Each of the dehydration unit 2, regeneration unit 3, filtration unit 4, and finished oil storage unit 5 is connected to the main oil pipe 10000 via a branch pipe. A diversion three-way valve connects the branch pipe to the main oil pipe 10000. For easy identification, the corresponding branch pipes are, in order, a dehydration branch pipe 7, a regeneration branch pipe 8, a filtration branch pipe 9, and a finished oil branch pipe 10. The corresponding diversion three-way valves are, in order, a dehydration diversion three-way valve 11, a regeneration diversion three-way valve 12, and a regeneration diversion three-way valve 13. Three-way valve 12 and filter diversion three-way valve 13. Since no three-way control is required between the end of the main oil pipe 10000 and the finished oil storage unit 5, no diversion three-way valve is installed between the end of the main oil pipe 10000 and the finished oil distribution pipe 10. At the same time, there are oil passage pipes between the dehydration unit 2 and the regeneration unit 3, between the regeneration unit 3 and the filter unit 4, and between the filter unit 4 and the finished oil storage unit 5, so that adjacent units can be connected through the oil pipes. There is a return oil pipe connected between the oil passage pipe and the main oil pipe 10000. A return oil three-way valve is connected at the connection between the return oil pipe and the oil passage pipe. For easy distinction, the oil passage pipes are in sequence the dehydration oil passage pipe 14, the regeneration oil passage pipe 15 and the filter oil passage pipe 16. The return oil three-way valves are in sequence the dehydration return oil three-way valve 17, the regeneration return oil three-way valve 18 and the filter return oil three-way valve 19.

[0050] In this embodiment, the online monitoring unit includes an initial comprehensive detector 20 connected to the crude oil storage unit 1, a trace moisture detector 21 connected to the dehydration unit 2, an acid value meter 22 and a volume resistivity sensor 23 connected to the regeneration unit 3, a particle detector 24 connected to the filtration unit 4, and a terminal comprehensive detector 25 connected to the finished oil storage unit 5. The trace moisture detector 21 is used to detect the moisture content of the fire-resistant oil after dehydration. The acid value meter 22 and the volume resistivity sensor 23 are used to detect the acid value and volume resistivity of the fire-resistant oil after regeneration. The particle detector 24 is used to detect the moisture content of the filtration unit 3. 4. Particle size index of the filtered fire-resistant oil: The initial comprehensive detector 20 and the terminal comprehensive detector 25 are used to comprehensively detect the acid value, volume resistivity, particle size and moisture content of the fire-resistant oil. After the corresponding index detection of the fire-resistant oil is completed, the monitoring parameters can be obtained. The control unit 6 compares the detected monitoring parameters with the standard threshold corresponding to the fire-resistant oil, automatically determines the purification items that the fire-resistant oil needs to be purified, and then the control unit 6 controls the corresponding diversion three-way valve and return three-way valve to switch, automatically forming the process route of the fire-resistant oil purification operation, so that the fire-resistant oil can automatically and specifically complete the corresponding purification operation.

[0051] like Figure 1As shown, the dehydration unit 2 includes a vacuum dehydrator 201 and a condenser 202 connected to the vacuum dehydrator 201. A trace moisture detector 21 is connected to the vacuum dehydrator 201. The vacuum dehydrator 201 removes moisture from the fire-resistant oil using methods such as flash evaporation. The removed moisture is condensed and collected in the condenser 202. The regeneration unit 3 includes a regeneration filter cartridge 301, and the filtration unit 4 includes a particulate filter cartridge 401. The regeneration filter cartridge 301 is used to reduce the acid value and increase the resistivity of the fire-resistant oil. A molecular polar adsorbent can be placed inside the regeneration filter cartridge 301. When the fire-resistant oil is pressurized and passes through the regeneration filter cartridge 301 containing the adsorbent, the regeneration process is completed, thereby reducing the acid value and increasing the resistivity. The particulate filter cartridge 401 is used to filter and remove particulate impurities from the fire-resistant oil. In addition, in this embodiment, a circulation pipe 26 is connected between the finished oil storage unit 5 and the main oil pipe 10000. The end of the circulation pipe 26 away from the finished oil storage unit 5 is located between the crude oil storage unit 1 and the dehydration unit 2. A circulation pump 27 and a circulation control valve 28 are connected to the circulation pipe 26. The circulation control valve 28 is signal-connected to the control unit 6.

[0052] Combination Figure 1 and Figure 2 To improve the regeneration and filtration effects of fire-resistant oil, in this embodiment, the number of both the regeneration filter cartridge 301 and the particulate filter cartridge 401 is at least two. Figure 2 The example shown separately illustrates the configuration of two regeneration filter cartridges 301 and two particulate filter cartridges 401, and the illustration uses two cartridges as an example. In other embodiments besides this one, the number of regeneration filter cartridges 301 and particulate filter cartridges 401 can be one, three, or more, which will not be illustrated here. In regeneration unit 3, adjacent regeneration filter cartridges 301 are connected by a regeneration series pipe 29, and a regeneration return pipe 30 is connected between the regeneration series pipe 29 and the main oil pipe 10000. A regeneration three-way valve 31 is connected between the regeneration return pipe 30 and the regeneration series pipe 29. In filtration unit 4, adjacent particulate filter cartridges 401 are connected by a filter series pipe 32, and a filter return pipe 33 is connected between the filter series pipe 32 and the main oil pipe 10000. A filter three-way valve 34 is connected between the filter return pipe 33 and the filter series pipe 32. Both the regeneration three-way valve 31 and the filter three-way valve 34 are signal-connected to the control unit 6.

[0053] Combination Figure 5 and Figure 6 The regeneration filter cartridge 301 and the granular filter cartridge 401 have similar overall structures, both consisting of a sleeve 35 and a filter element assembly disposed within the sleeve 35. Figure 8 , Figure 9 , Figure 10 and Figure 11The filter element assembly includes an outer filter screen 36, an intermediate filter section 37, and an inner filter screen 38 arranged vertically and coaxially from the outside to the inside. An outer gap is provided between the outer filter screen 36 and the inner wall of the sleeve 35. An oil inlet port 39 communicating with the outer gap is welded to the outer wall of the sleeve 35. The intermediate filter section 37 is fixedly connected to the outer wall of the inner filter screen 38, and an inner gap is provided between the intermediate filter section 37 and the inner wall of the outer filter screen 36. The difference between the regeneration filter cartridge 301 and the particulate filter cartridge 401 lies only in the material and structure of the intermediate filter section 37. Specifically, the intermediate filter section 37 in the regeneration filter cartridge 301 consists of a mesh bag and a molecular polar adsorbent filled within the mesh bag, while the intermediate filter section 37 in the particulate filter cartridge 401 consists of filter materials such as glass fiber and glass fiber filter paper. This allows the regeneration filter cartridge 301 to perform regeneration treatment of fire-resistant oil, while the particulate filter cartridge 401 performs particulate filtration treatment of fire-resistant oil.

[0054] Both the outer filter screen 36 and the inner filter screen 38 are annular steel mesh structures. Both the outer filter screen 36 and the inner filter screen 38 have filter holes, and the diameter of the filter holes on the outer filter screen 36 is larger than that on the inner filter screen 38. The two ends of the outer filter screen 36 are fixedly connected to an outer upper sealing end plate 40 and an outer lower sealing end plate 41 by welding or other methods. The top and bottom ends of the sleeve 35 are integrally formed with an outer flange 3501 protruding beyond the side wall of the sleeve 35, and the inner wall of the sleeve 35 near the bottom end has an inner flange 3502 extending inwards. The bottom surface of the outer lower sealing end plate 41 contacts the bottom surface of the inner flange 3502. The side wall of the outer upper sealing end plate 40 is integrally formed with an outer upper protruding ring 4001 protruding beyond the side wall of the outer upper sealing end plate 40. The outer upper protruding ring 4001 is fixedly connected to the outer flange 3501 at the top of the sleeve 35 by screws. The inner filter screen 38 is fixedly connected to an inner upper sealing end plate 42 and an inner lower sealing end plate 43 at both ends by welding or other methods. The bottom of the outer upper sealing end plate 40 has an upper mating groove, and the outer wall of the inner upper sealing end plate 42 is integrally formed with an inner upper protruding ring 4201 that mates with the upper mating groove. The top surface of the outer lower sealing end plate 41 has a lower mating groove, and the inner lower sealing end plate 43 is inserted into the lower mating groove. At the same time, the middle of the inner upper sealing end plate 42 is fixedly connected to an oil outlet port 4202 that communicates with the inside of the inner filter screen 38. An explosion-proof hose of the prior art can be connected to the oil outlet port 4202 to transport the regenerated or filtered fire-resistant oil to the next process.

[0055] Combination Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 8A cleaning component is vertically slidably connected to the outer side of the outer filter screen 36. A spray component facing the middle filter section 37 is connected to the outer upper sealing end plate 40. A vertical drive mechanism for driving the inner upper sealing end plate 42 to slide vertically is connected to the sleeve 35. A linkage component is connected between the cleaning component and the inner upper sealing end plate 42. Specifically, the cleaning component in this embodiment includes a cleaning collar 44 sleeved on the outside of the outer filter screen 36. The cleaning collar 44 fits against the outer wall of the outer filter screen 36. A vertically penetrating dirt passage groove 4401 is opened on the cleaning collar 44, and a vertically penetrating drain groove 4101 is opened on the outer lower sealing end plate 41. There are multiple dirt passage grooves 4401 and drain grooves 4101, which are evenly arranged along the circumference of the outer filter screen 36. A sealing plate 45 is fixedly connected to the bottom end of the sleeve 35 by screws. A storage gap is provided between the top surface of the sealing plate 45 and the bottom surface of the outer lower sealing end plate 41 for storing impurities such as fire-resistant oil treatment particles and metal scraps. When the impurities are stored to a certain amount, the sealing plate 45 can be removed to clean the impurities in the storage gap.

[0056] Combination Figure 4 and Figure 6 In this embodiment, the linkage mechanism includes a linkage rod 46. The bottom end of the linkage rod 46 is fixedly connected to the cleaning collar 44 by screws, and the top end of the linkage rod 46 is fixedly connected to the inner upper sealing end plate 42 by screws. The outer upper sealing end plate 40 has a through hole for vertical sliding cooperation with the linkage rod 46. To improve driving stability, there are multiple linkage rods 46, and these multiple linkage rods 46 are evenly arranged along the circumference of the inner upper sealing end plate 42. Figure 6 and Figure 7 In this embodiment, the spraying assembly includes a high-pressure nozzle 47 with its spray end inclined downward toward the central axis of the outer filter screen 36. There are multiple high-pressure nozzles 47, and the multiple high-pressure nozzles 47 are evenly arranged along the circumference of the outer upper sealing end plate 40. The high-pressure nozzle 47 is connected to both a high-pressure liquid supply pipe and a high-pressure gas supply pipe. A switching three-way valve is installed between the high-pressure liquid supply pipe, the high-pressure gas supply pipe, and the pipe connected to the high-pressure nozzle 47. The switching three-way valve is connected to the control unit 6. The control unit 6 can control the high-pressure nozzle 47 to spray high-pressure cleaning liquid or gas.

[0057] Combination Figure 3 , Figure 4 and Figure 6In this embodiment, the driving mechanism includes a driver 48 and a drive rod 49 connected to the driver 48. The driver 48 can be a motor lead screw assembly. In this embodiment, for ease of control and to provide stable driving force, the driver 48 is an electric cylinder. When specifically setting the driver 48, all regeneration filter cartridges 301 and granular filter cartridges 401 are mounted on the base 50, and all regeneration filter cartridges 301 and granular filter cartridges 401 are evenly arranged on the circumference of the base 50 with the driver 48 as the center. Two vertical supports 51 are fixedly connected to the base 50 by screws, and the two vertical supports 51 are located on both sides of the driver 48. The top of the vertical supports 51 is fixedly connected to a horizontally mounted... The guide plate 52 is positioned above the drive rod 49, and the top of the drive rod 49 is fixedly connected to the drive plate 53, which is located above the guide plate 52 and parallel to the guide plate 52, by screws. A vertically arranged pull rod 54 is fixedly connected to the drive plate 53 by bolts. The pull rod 54 slides with the guide plate 52, and the bottom end of the pull rod 54 is detachably connected to the inner upper sealing end plate 42. For the detachable connection, screws or the like can be used. Of course, for the convenience of remote control and intelligent control, an electronic lock structure, such as an electromagnetic control lock, can be set at the bottom end of the pull rod 54. When the electronic lock structure is powered on or off, the corresponding pull rod 54 can be connected or disconnected from the corresponding inner upper sealing end plate 42. Then, the corresponding control operation is completed by using the driver 48 to drive the corresponding pull rod 54 to move.

[0058] The specific implementation process is as follows: First, the fire-resistant oil to be tested is transported to crude oil storage unit 1. The initial comprehensive testing instrument 20 is used to perform quality testing on the fire-resistant oil in crude oil storage unit 1. The testing parameters mainly include the acid value, volume resistivity, particle size, and moisture content of the fire-resistant oil. The control unit 6 compares the test results with standard thresholds to determine the necessary processing steps for the fire-resistant oil. Then, the fire-resistant oil is driven to the corresponding processing unit for purification. This embodiment only illustrates a few examples, including but not limited to individual dehydration, regeneration, or filtration treatments, or a combination of dehydration and regeneration treatments, or a combination of dehydration and filtration treatments, or regeneration... Combined with filtration, or dehydration, regeneration and filtration, etc.; In addition, after the fire-resistant oil undergoes dehydration, regeneration and filtration, the trace moisture detector 21, acid value analyzer 22, volume resistivity sensor 23 and particle detector 24 will specifically test the fire-resistant oil after a certain treatment unit to detect whether the corresponding treatment unit has achieved the predetermined purification effect. If the corresponding treatment unit fails to meet the standard, the control unit 6 can control the connection of the corresponding oil distribution pipe, the diversion three-way valve and the oil passage pipe, so that the fire-resistant oil flows back to the corresponding treatment unit for circulation treatment until the fire-resistant oil is purified to meet the standard.

[0059] For example, when regeneration and filtration are combined, control unit 6 controls regeneration diversion three-way valve 12, filtration diversion three-way valve 13, regeneration return oil three-way valve 18, and filtration return oil three-way valve 19, so that the fire-resistant oil in the original oil storage unit can flow sequentially through the main oil pipe 10000, regeneration diversion three-way valve 12, regeneration oil distribution pipe 8, regeneration unit 3, regeneration oil passage pipe 15, filtration unit 4, filtration return oil three-way valve 19, and filtration oil passage pipe 16 before entering the finished oil storage unit 5, so that the fire-resistant oil undergoes regeneration and filtration treatment in sequence. In addition, in this embodiment, after the fire-resistant oil is purified and collected in the finished oil storage unit 5, the terminal integrated detector 25 will perform a final test on the fire-resistant oil in the finished oil storage unit 5 to ensure that the fire-resistant oil is purified to the expected effect. When it is detected that a certain indicator of the fire-resistant oil still does not meet the standard, the control unit 6 can control the circulation pump 27 and the circulation control valve 28 to pneumatically pump the fire-resistant oil in the finished oil storage unit 5 back to the main oil pipe 10000. Then the control unit 6 controls the fire-resistant oil to be transported to the corresponding processing unit for cyclic processing until the fire-resistant oil finally meets the standard.

[0060] After long-term treatment of fire-resistant oil, the filter element assembly of the corresponding regeneration unit 3 and filter unit 4 will be regenerated or the filtration efficiency will be weakened after a period of use. At this time, the filter element assembly can be cleaned / washed. The specific operation is as follows: When the corresponding filter element assembly needs to be cleaned / washed, the control unit 6 controls the corresponding pull rod 54 to be connected and fixed to the inner upper sealing end plate 42 in the corresponding filter element assembly. Then, the driver 48 pushes the drive disk 53 to move upward through the drive rod 49. When the drive disk 53 moves, it drives the corresponding pull rod 54 and the inner upper sealing end plate 42 corresponding to the pull rod 54 to move upward. The guide disk 52 provides guidance for the pulling process of the pull rod 54. When the inner upper sealing end plate 42 moves upward, the inner upper sealing end plate 42, the corresponding inner filter screen 38, the intermediate filter section 37, the inner lower sealing end plate 43, and the linkage rod 46 also move upward. The linkage rod 46 pulls the cleaning collar 44 upward to clean the outer wall of the outer filter screen 36. At the same time, the control unit 6 controls the high-pressure cleaning fluid to be sprayed out from the high-pressure nozzle 47. The sprayed high-pressure cleaning fluid cleans the outer wall of the intermediate filter section 37. The cleaned liquid flows from the filter holes of the outer filter screen 36 to the outside of the outer wall of the outer filter screen 36 and backwashes the filter holes of the outer filter screen 36, improving the cleaning effect of the outer filter screen 36.

[0061] After the intermediate filter section 37 and the inner filter screen 38 move upward to their upper limit position to complete the cleaning, the driver 48 drives the entire structure to reset. After resetting, the control unit 6 controls the high-pressure nozzle 47 to spray gas into the inner gap between the intermediate filter section 37 and the outer filter screen 36. The gas can be appropriately heated. When the gas enters the inner gap, some of the gas can pass through the outer filter screen 36 and enter the outer gap, while the other part of the gas can enter the inner filter screen 38 through the intermediate filter section 37 and the inner filter screen 38, so that the entire filter element assembly can be dried quickly. In addition, the impurities cleaned by the cleaning ring 44 can flow downward into the storage gap through the dirt tank 4401 and the drain tank 4101. When the impurities accumulate to a certain amount, the sealing plate 45 can be removed for centralized cleaning.

[0062] Example 2 The difference between Example 2 and Example 1 is as follows: Figure 12 As shown, in this embodiment, a heating unit 55 is provided between the crude oil storage unit 1 and the dehydration unit 2. The heating unit 55 includes a multi-stage heater and is connected to the main oil pipe 10000. Before the fire-resistant oil in the crude oil storage unit 1 is transported to each processing unit, it can be heated by the heating unit 55, thereby improving the purification effect of the fire-resistant oil in each unit.

[0063] Example 3 The difference between Example 3 and Example 1 is that: [The text abruptly ends here, likely due to an incomplete sentence or a formatting error.] Figure 13 and Figure 14 In this embodiment, a blocking collar 56 is fixedly connected to the top surface of the inner lower sealing end plate 43 by screws. The blocking collar 56 is located between the outer filter screen 36 and the inner filter screen 38. The top height of the blocking collar 56 is higher than the top height of the cleaning collar 44, and the blocking collar 56 is in contact with the inner wall of the outer filter screen 36. When the linkage rod 46 pulls the cleaning collar 44 upward to clean the outer wall of the outer filter screen 36, the blocking collar 56 can move upward synchronously to assist in cleaning the inner wall of the outer filter screen 36. Moreover, since the top height of the blocking collar 56 is higher than the top height of the cleaning collar 44, in the actual cleaning process of the outer filter screen 36, the blocking collar 56 always precedes the cleaning collar 44. When the blocking collar 56 can block the filter holes of the outer filter screen 36 from the inside, it prevents the cleaning collar 44 from squeezing impurities through the filter holes to the inside of the outer filter screen 36 when cleaning the outer wall of the outer filter screen 36, thus ensuring the cleaning effect of the outer filter screen 36.

[0064] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A fire-resistant centralized purification intelligent device, characterized in that: The system includes a crude oil storage unit, a dehydration unit, a regeneration unit, a filtration unit, a refined oil storage unit, an online monitoring unit, and a control unit. A main oil pipe is connected to the crude oil storage unit. Oil distribution pipes connect the dehydration unit, regeneration unit, filtration unit, and refined oil storage unit to the main oil pipe, and a flow-dividing three-way valve connects the oil distribution pipes to the main oil pipe. Oil passing pipes connect the dehydration unit to the regeneration unit, the regeneration unit to the filtration unit, and the filtration unit to the refined oil storage unit. A return oil pipe connects the oil passing pipes to the main oil pipe, and a return oil three-way valve connects the return oil pipes to the oil passing pipes. The online monitoring unit, the flow-dividing three-way valve, and the return oil three-way valve are all signal-connected to the control unit.

2. The intelligent centralized purification device for fire-resistant oil as described in claim 1, characterized in that: A circulation pipe is connected between the finished oil storage unit and the main oil pipe. The end of the circulation pipe away from the finished oil storage unit is located between the crude oil storage unit and the dehydration unit. A circulation pump and a circulation control valve are connected to the circulation pipe.

3. The intelligent centralized purification device for fire-resistant oil as described in claim 2, characterized in that: A heating unit is provided between the crude oil storage unit and the dehydration unit, and the heating unit is connected to the main oil pipeline.

4. The intelligent centralized purification device for fire-resistant oil as described in claim 3, characterized in that: The online monitoring unit includes an initial comprehensive testing instrument connected to the crude oil storage unit, a trace moisture testing instrument connected to the dehydration unit, an acid value measuring instrument and a volume resistivity sensor connected to the regeneration unit, a particle testing instrument connected to the filtration unit, and a terminal comprehensive testing instrument connected to the finished oil storage unit.

5. The intelligent centralized purification device for fire-resistant oil as described in claim 4, characterized in that: The dehydration unit includes a vacuum dehydrator and a condenser connected to the vacuum dehydrator, and a trace moisture detector is connected to the vacuum dehydrator; the regeneration unit includes a regeneration filter cartridge, and the filtration unit includes a particle filter cartridge.

6. The intelligent centralized purification device for fire-resistant oil as described in claim 5, characterized in that: The number of regeneration filter cartridges and particulate filter cartridges is at least two. Adjacent regeneration filter cartridges are connected by a regeneration series pipe, and a regeneration return pipe is connected between the regeneration series pipe and the main oil pipe. A regeneration three-way valve is connected between the regeneration return pipe and the regeneration series pipe. Adjacent particulate filter cartridges are connected by a filter series pipe, and a filter return pipe is connected between the filter series pipe and the main oil pipe. A filter three-way valve is connected between the filter return pipe and the filter series pipe. Both the regeneration three-way valve and the filter three-way valve are signal-connected to the control unit.

7. The intelligent device for centralized purification of fire-resistant oil as described in claim 5, characterized in that: Both the regeneration filter cartridge and the particle filter cartridge include a sleeve and a filter element assembly coaxially connected within the sleeve. The filter element assembly includes an outer filter screen, a middle filter section, and an inner filter screen arranged vertically and coaxially from the outside to the inside. An outer upper sealing end plate and an outer lower sealing end plate are fixedly connected to both ends of the outer filter screen, and an inner upper sealing end plate and an inner lower sealing end plate are fixedly connected to both ends of the inner filter screen. The middle filter section is fixedly connected to the outside of the inner filter screen. A cleaning component is slidably connected to the outside of the outer filter screen. A spray component facing the middle filter section is connected to the outer upper sealing end plate. A vertical drive mechanism for driving the inner upper sealing end plate to slide vertically is connected to the sleeve. A linkage component is connected between the cleaning component and the inner upper sealing end plate.

8. The intelligent centralized purification device for fire-resistant oil as described in claim 7, characterized in that: The linkage mechanism includes linkage rods, one end of which is fixedly connected to the inner upper sealing end plate and the other end of which is fixedly connected to the cleaning collar. There are multiple linkage rods arranged circumferentially along the inner upper sealing end plate. The spraying assembly includes high-pressure nozzles with their spray ends inclined downward toward the central axis of the outer filter screen. There are multiple high-pressure nozzles arranged circumferentially along the outer upper sealing end plate.

9. The intelligent centralized purification device for fire-resistant oil as described in claim 8, characterized in that: The cleaning assembly includes a cleaning collar sleeved on the outside of the outer filter screen, with a vertically penetrating dirt passage groove on the cleaning collar and a vertically penetrating drain groove on the outer lower sealing end plate.

10. The intelligent device for centralized purification of fire-resistant oil as described in claim 7, characterized in that: A blocking collar is fixedly connected to the inner lower sealing end plate. The blocking collar is located between the outer filter screen and the inner filter screen, and the height of the top of the blocking collar is higher than the height of the top of the cleaning collar.

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