High-purity liquid oxygen preparation method, system and terminal based on air separation technology

Abstract

The invention relates to a high-purity liquid oxygen preparation method and system based on an air separation technology and a terminal, and relates to the field of air separation.The method comprises the steps that a filter screen image of an inner cavity of an air filter is obtained; determining whether impurity features exist according to the filter screen image and an impurity feature library; based on impurity characteristics, determining impurity coverage thickness according to the filter screen image, the impurity characteristics and the reference point; on the basis that the impurity covering thickness is larger than the reference filtering thickness, a filter screen is cleaned through a filter cleaning method; after cleaning, determining whether fracture features exist or not according to the filter screen image and a fracture feature library; and repairing the filter screen in the air filter by using a filter screen repairing method based on the existence of the fracture characteristic. By adopting the technical scheme, the system can perform real-time treatment on the filter screen in the air filter, so that impurities, dust and broken positions on the filter screen do not easily influence the air filtering efficiency, and the air filtering efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of air separation, and in particular to a method, system and terminal for preparing high-purity liquid oxygen based on air separation technology. Background Art

[0002] Air separation technology is a technology that uses the different boiling points of various gas components in the air to separate the various gas components through compression, cooling, liquefaction, distillation and other processes. Air separation technology can efficiently extract specific gases, such as oxygen, nitrogen, etc., and is widely used in petrochemical, metallurgical, pharmaceutical, food and other fields.

[0003] Before separating air to extract high-purity liquid oxygen, the air needs to be filtered to remove impurities and dust in the air. In the prior art, air is filtered through an air filter, and a filter screen is provided in the air filter for filtering. After the filter screen has been used for a period of time, dust and impurities generated by filtration will accumulate on its surface. When dust and impurities accumulate to a certain extent and are not cleaned, the overall efficiency of air filtration will be affected. This requires the operator to frequently replace the filter screen when the equipment is producing oxygen, which is more cumbersome. Summary of the invention

[0004] In order to enable the air filter to always maintain high filtering efficiency of air, the present invention provides a method, system and terminal for preparing high-purity liquid oxygen based on air separation technology.

[0005] In a first aspect, the present invention provides a method for producing high-purity liquid oxygen based on air separation technology, which adopts the following technical solution: A method for producing high-purity liquid oxygen based on air separation technology, comprising: Acquire a preset filter screen image of the air filter cavity; Determine whether impurity features exist based on the filter screen image and a preset impurity feature library; Based on the existing impurity characteristics, the impurity coverage thickness is determined according to the filter screen image, the impurity characteristics and the preset reference points; Based on the impurity coverage thickness being greater than the preset reference filter thickness, the preset filter screen is cleaned using a filter cleaning method; After cleaning, determine whether there is a rupture feature based on the filter screen image and a preset rupture feature library; Based on the existence of the rupture feature, the filter in the air filter is repaired by a filter repair method; Based on the impurity coverage thickness being greater than a preset reference filter thickness, the air filter is controlled to filter the raw air at a preset filter power so as to send the raw air into a preset cooling tower for pre-cooling and oxygen production.

[0006] By adopting the above technical solution, when preparing high-purity liquid oxygen, the air raw material used to prepare liquid oxygen is first filtered. In order to ensure the filtering efficiency, the system can process the filter in the air filter in real time, remove the impurities and dust on the filter in real time, and repair the broken parts of the filter, so that the impurities and dust and the broken parts on the filter are not easy to affect the air filtration efficiency, thereby improving the air filtration efficiency.

[0007] Optionally, the top of the air filter is an air inlet, and a fan blade is rotatably provided at the air inlet, and the angle of the fan blade is adjustable; the filter cleaning method includes: Determine the filter radius based on the filter image; Determine the cleaning radius of the preset circular area in the center of the filter that needs to be cleaned according to the filter radius and the dust accumulation width of the preset dust accumulation area; Generate a blowing path of the fan blades according to the clearing radius and the preset spiral line model; Match the blowing angle of the fan blades according to the blowing path; The fan blades are controlled according to the blowing angle and the filtering power to blow the impurity features along the blowing path so as to blow the impurity features to the periphery of the filter screen.

[0008] By adopting the above technical solution, the fan blades arranged in the air filter are used to blow air to the circular area of ​​the filter, and the air to be filtered is used to blow all the impurity features on the filter to the surrounding areas of the filter, so that the impurity features within the removal radius of the center of the filter are less, so that the filter can continue to filter the air with higher efficiency without the need for frequent replacement of the filter.

[0009] Optionally, also include: During the blowing process, the thickness of impurities on the blowing path is determined in real time based on the filter image and impurity characteristics; Match the blowing power of the fan blades according to the thickness of impurities covered; Replace the filtering power with the blowing power; The fan blades are controlled to blow air along the blowing path according to the blowing power.

[0010] Optionally, the method further includes controlling the fan blades to blow air to the impurity features along the blowing path according to the blowing angle and the filtering power so as to blow the impurity features to the periphery of the filter screen: After blowing, the thickness of impurities on the filter surface after blowing is determined according to the filter image and impurity characteristics; Based on the consistency between the thickness of impurities after blowing and the thickness of impurities covered before blowing, the position of the uplift point is determined according to the removal radius of the circular area and the preset array point model; Matching the ridge height at the ridge point location according to the impurity coverage thickness; According to the position of the bulge point and the bulge height, the jacking device preset under the filter screen is controlled to jack up the filter screen to split the impurity characteristics; The fan blades are controlled according to the blowing angle and the filtering power to blow the impurity features along the blowing path so as to blow the impurity features to the periphery of the filter screen.

[0011] By adopting the above technical solution, when direct blowing cannot remove the impurity features, the system can control the lifting device to lift up the specified position in the filter net. During the lifting process of the filter net, the impurity features can produce cracks and can be blown away more easily, which is more convenient.

[0012] Optionally, also include: Acquire an uplift image at the uplift point location; Determine the crack concentration position around the uplift point according to the uplift image and the preset crack characteristics; Determine the auxiliary blowing angle of the fan blade when blowing air to the crack-dense location according to the crack-dense location and the preset fan blade position; The fan blades are controlled according to the auxiliary blowing angle to blow air to the locations where cracks are densely concentrated so as to disperse the impurity features.

[0013] Optionally, the fan blade is installed on the top of the air filter, and the length of the fan blade is adjustable; and further comprising: After the fan blades blow air to the impurity features of the bulge and splitting, the thickness of the impurities on the surface of the filter screen after the bulge and blowing is determined according to the filter screen image and the impurity features; Based on the consistency between the thickness of impurities after the bulge blowing and the thickness of impurities after the blowing, the descending height of the fan blade is determined according to the preset fan blade position, the preset filter screen position and the thickness of impurities after the bulge blowing; According to the thickness of the impurities after the bulge blowing, the contact pressure when the fan blades abut against the characteristic surface of the impurities is matched; Determine the length adjustment amount of the fan blades according to the clearing radius; The fan blades are adjusted according to the length adjustment amount, and the fan blades are controlled to descend according to the descending height and abut against the characteristic surface of the impurity with abutting pressure; The fan blades are controlled to rotate with a preset dust removal power to push the impurity features toward the circumference of the filter.

[0014] By adopting the above technical solution, for impurity features firmly attached to the surface of the filter, the system can control the fan blades to descend, and use the fan blades as scraping devices. The impurity dust on the surface of the filter can be directly moved into the dust accumulation area through the rotation of the fan blades. It is highly efficient and can target all types of impurity features.

[0015] Optionally, the top of the air filter has an outer ring air duct and an inner ring air duct arranged in a ring shape, the outer ring air duct is located outside the inner ring air duct, and the outer ring air duct and the inner ring air duct can be switched for use; impurity characteristics blown to the dust accumulation area around the filter need to be removed, and the method for removing the impurity characteristics of the dust accumulation area includes: Control the inner ring air duct to close and the outer ring air duct to open; Determine the dust accumulation thickness of the impurity characteristics blown to the dust accumulation area according to the filter screen image and the impurity characteristics; Based on the dust accumulation thickness being greater than the preset removal thickness, matching the preset refrigeration power of the refrigeration device according to the preset freezing point temperature; Controlling the fan blades to blow air to the impurity features in the dust accumulation area through the outer ring air duct with the filtering power, and controlling the refrigeration device to refrigerate the air entering the air filter to condense the moisture in the air on the impurity features and freeze the impurity features; The preset side door is controlled to open and the preset clamping device is controlled to take out the impurity features frozen in the dust accumulation area.

[0016] By adopting the above technical solution, the air entering the air filter is cooled, and the moisture in the air can condense on the surface of the impurity feature and mix with the impurity feature. Then, the impurity feature and the moisture are frozen under low temperature conditions so that the impurity feature is frozen into one piece, so that the clamping device can directly clamp the impurity feature out of the air filter without replacing the filter. In addition, the air also needs to be cooled after passing through the air filter, and pre-cooling can be performed in advance in this step.

[0017] Optionally, filter repair methods include: Determine the rupture position and rupture shape type according to the filter screen image, rupture characteristics and reference points, and the rupture shape types include linear and hole shapes; Based on the line shape, the line trajectory is determined according to the filter image and the rupture characteristics; Determine the following angle of the fan blade when blowing along the linear trajectory according to the linear trajectory; Control the preset refrigeration device to cool the air entering the air filter, and control the fan blades to blow along a linear trajectory according to the follow angle to condense and freeze the moisture in the air at the linear rupture of the filter; Based on the hole shape, the rupture area is determined according to the filter image and rupture characteristics; Output filter replacement reminder based on the rupture area being larger than the preset replacement area; Based on the fact that the cracked area is not larger than the replacement area, the required covering area is determined according to the cracked area; Determine the repair impurity features and repair impurity positions that meet the area requirements in the dust accumulation area according to the required covering area and the filter screen image; The fan blades are controlled to blow the repair impurity feature from the repair impurity position to the rupture position to cover the rupture feature.

[0018] In the second aspect, the present application provides a high-purity liquid oxygen production system based on air separation technology, which adopts the following technical solution: A high-purity liquid oxygen production system based on air separation technology, comprising: An acquisition module, used to acquire a filter screen image of an inner cavity of an air filter and an uplift image at a uplift point; A memory for storing a program of any one of the above-mentioned methods for producing high-purity liquid oxygen based on air separation technology; The program in the processor memory can be loaded and executed by the processor to realize a method for producing high-purity liquid oxygen based on air separation technology.

[0019] In a third aspect, the present application provides a smart terminal, which adopts the following technical solution: An intelligent terminal comprises a memory and a processor, wherein the memory stores a computer program which can be loaded by the processor and execute any one of the above-mentioned high-purity liquid oxygen production methods based on air separation technology.

[0020] In summary, the present application includes at least one of the following beneficial technical effects: 1. When preparing high-purity liquid oxygen, the air raw material used to prepare liquid oxygen is first filtered. During the filtering process, the system can process the filter in the air filter in real time, remove the impurities and dust on the filter in real time, and repair the broken parts of the filter, so that the impurities and dust and broken parts on the filter are not easy to affect the efficiency of air filtration, thereby improving the air filtration efficiency; 2. The system can adopt a "three-step method" to first blow air through the fan blades, then split the impurity features through the jacking device, and finally directly scrape the stubborn impurity features through the fan blades, thereby effectively removing the impurity features on the surface of the filter, so that the impurity features within the center of the filter are less, so that the filter can continue to filter the air with higher efficiency without the need to frequently replace the filter; 3. By cooling the air entering the air filter, the moisture in the air can condense on the surface of the impurity features and mix with the impurity features. Then, the impurity features and the moisture are frozen under low temperature conditions so that the impurity features are frozen into one piece, making it easier for the clamping device to directly clamp the impurity features out of the air filter without replacing the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of an air filter in an embodiment of the present invention; Figure 2This is a method flow chart of a method for producing high-purity liquid oxygen based on air separation technology according to an embodiment of the present invention; Figure 3 is a method flow chart of a filter cleaning method according to an embodiment of the present invention; Figure 4 is a method flow chart of a method for processing a fan blade of an embodiment of the present invention when the fan blade blows air to the impurity feature along the blowing path but the impurity feature cannot be removed; Figure 5 It is a method flow chart of a method for processing a case where impurity features are separated by protrusions and the impurity features cannot be removed when blowing air through a fan blade according to an embodiment of the present invention; Figure 6 is a method flow chart of a method for removing impurity characteristics from a dust accumulation area according to an embodiment of the present invention; The names of the parts indicated by the numerical labels in the above drawings are as follows: 1. inner cavity; 2. air inlet; 3. air outlet; 4. filter; 5. fan blades; 6. outer ring air duct; 7. inner ring air duct. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] The embodiment of the present application discloses a method for producing high-purity liquid oxygen based on air separation technology. The air filter is treated before the oxygen production process, the filter screen 4 in the air filter is cleaned and repaired, impurities and dust on the filter screen 4 are removed, and the broken position on the filter screen 4 is repaired, so that the filter screen 4 can always filter the air well.

[0024] Reference Figure 1 In this embodiment, the air filter has an inner cavity 1 for air filtering, the top of the inner cavity 1 is an air inlet 2, and the bottom of the inner cavity 1 is an air outlet 3. A filter screen 4 for filtering air is arranged in the middle of the air filter. The air filter is provided with a fan blade 5 at one end near the air inlet 2 for rotation and lifting. The fan blade 5 is used to guide the flow direction of the air. The orientation angle of the fan blade 5 can be adjusted, and the height position of the fan blade 5 can be adjusted by lifting. The blades of the fan blade 5 can be extended and retracted, so as to adjust the rotation radius of the fan blade 5.

[0025] The air filter is also provided with an outer ring air duct 6 and an inner ring air duct 7 for air to pass through at one end near the air inlet 2, and the outer ring air duct 6 is located outside the inner ring air duct 7. The outer ring air duct 6 and the inner ring air duct 7 can be switched for use. When the outer ring air duct 6 is opened, the inner ring air duct 7 is closed. The outer ring air duct 6 and the inner ring air duct 7 are both located below the fan blades 5, and the fan blades 5 can pass through the inner ring air duct 7 during the lifting process.

[0026] Reference Figure 2 A method for producing high-purity liquid oxygen based on air separation technology comprises the following steps: Step S100: obtaining a preset filter screen image of the air filter inner cavity 1.

[0027] The filter image is an image of the filter 4 obtained by a camera arranged in the air filter, which includes the filter 4 and impurities and dust on the filter 4.

[0028] Step S101: determining whether there is an impurity feature based on the filter screen image and a preset impurity feature library.

[0029] The impurity feature library refers to an image obtained through machine learning that contains dust impurities that can be deposited on the surface of the filter 4 from the air, which will not be described in detail here.

[0030] The filter image is compared with the impurity feature library. If the filter image has an image similar to the impurity dust in the impurity feature library, it means that the impurity feature exists. The impurity feature refers to the dust impurities in the air. When the air passes through the filter 4, the impurity feature can be filtered on the filter 4.

[0031] Step S102: Based on the existence of impurity features, the impurity coverage thickness is determined according to the filter screen image, the impurity features and a preset reference point.

[0032] If no impurity signature is present, no treatment of the air filter is required.

[0033] If there are impurity features, before cleaning the filter 4, it is necessary to determine the impurity coverage thickness, which refers to the thickness of impurity dust deposited and covered on the surface of the filter 4. The cleaning method of the filter 4 is determined according to the impurity coverage thickness.

[0034] The reference point is set by the technician to determine the image ratio when the camera takes the image. The reference point is a fixed reference point in the filter, and its distance to the camera is a fixed value, which will not be elaborated here.

[0035] The proportion of the image taken by the camera can be determined based on the filter image and the reference point, and the thickness of the impurity features in the filter image can be determined based on the filter image and the impurity features. Finally, the impurity coverage thickness can be determined based on the thickness of the impurity features in the filter image and the image proportion.

[0036] Step S1031: Based on the impurity coverage thickness being greater than the preset reference filter thickness, the preset filter screen 4 is cleaned using a filter cleaning method.

[0037] The reference filtration thickness is a standard set by technicians to measure whether the characteristics of impurities deposited on the surface of the filter 4 will affect air filtration and need to be removed, which will not be elaborated here.

[0038] When the impurity coverage thickness is greater than the reference filter thickness, the impurity coverage thickness of the impurity feature on the surface of the filter screen 4 is relatively thick and needs to be removed. The impurity feature is removed by a filter cleaning method, which will not be described in detail here and will be described in detail in subsequent embodiments.

[0039] Step S10311: After cleaning, determine whether there is a rupture feature based on the filter image and a preset rupture feature library.

[0040] After the impurity features on the surface of the filter 4 are removed, it is necessary to determine whether the surface of the filter 4 is damaged, because the damage of the filter 4 will affect the normal use of the filter 4, and the air cannot filter the air when passing through the damaged part.

[0041] The damage feature library refers to images obtained through machine learning that include various types of cracks generated on the surface of the filter 4, which will not be described in detail here.

[0042] The filter screen image is compared with the rupture feature library. If ruptures are found in the filter screen image as compared with those in the rupture feature library, it indicates that rupture features exist on the filter screen 4 .

[0043] Step S10312: Based on the existence of the rupture feature, the filter 4 in the air filter is repaired using a filter repair method.

[0044] If there is no rupture feature, the filter screen 4 can continue to filter the air after the impurity feature is removed.

[0045] If there are rupture features, the filter 4 needs to be temporarily repaired by a filter repair method so that the filter 4 can continue to be used for a period of time before replacement. The filter repair method is not described here in detail and will be described in detail in subsequent embodiments.

[0046] Step S1032: Based on the impurity coverage thickness being greater than a preset reference filter thickness, the air filter is controlled to filter the raw air with a preset filter power so as to send the raw air to a preset cooling tower for pre-cooling and oxygen production.

[0047] When the impurity coverage thickness is not greater than the reference filtration thickness, it means that although the surface of the filter 4 is covered with impurities, the impurity characteristics are relatively small and it can still be used for air filtration. Therefore, there is no need to remove the impurity characteristics on the surface of the filter 4 for the time being.

[0048] The filtering power is the power of the air filter set by the technicians to filter the air. It mainly refers to the power of the air filter to absorb air from the outside. I will not elaborate on this. The cooling tower is used to pre-cool the air after air filtration. Air pre-cooling is a necessary step in the production of liquid oxygen. I will not elaborate on this.

[0049] Reference Figure 3 , the filter cleaning method comprises the following steps: Step S200: determining the filter radius according to the filter image.

[0050] The filter image includes features of the filter 4 , and the radius of the filter 4 can be determined from the filter image.

[0051] Step S201: determining the cleaning radius of a preset circular area in the center of the filter 4 that needs to be cleaned according to the filter radius and the dust accumulation width of the preset dust accumulation area.

[0052] In this embodiment, the method for cleaning impurity features is to push the dust impurities in the middle of the filter 4 to the surrounding areas of the filter 4. The area in the filter 4 where the impurity features need to be cleaned is a circular area, and the area around the filter 4 for stacking impurity features is the dust accumulation area, and the dust accumulation area is a ring-shaped area.

[0053] The dust accumulation width is the width of the dust accumulation area, and the removal radius is the radius of the circular area where impurity characteristics need to be removed.

[0054] The sum of the radius of the circular area and the width of the dust accumulation area is the filter radius, so the cleaning radius of the circular area can be determined based on the filter radius and the dust accumulation width.

[0055] Step S202: Generate a blowing path for the fan blade 5 according to the clearing radius and a preset spiral line model.

[0056] The spiral line model is a model set by technical personnel, which can generate a spiral line with a specified width path within a circular range of a specified radius, and will not be described in detail here.

[0057] The blowing path refers to the moving path of the blowing point of the fan blade 5 when the fan blade 5 blows air to the circular area to blow the impurity characteristics to the dust accumulation area.

[0058] After determining the clearing radius, the blowing path can be obtained by simulating the spiral model in the circular area.

[0059] Step S203: matching the blowing angle of the fan blade 5 when blowing air according to the blowing path.

[0060] The blowing angle is the angle of the direction of the fan blade 5 when the fan blade 5 blows air to any point on the blowing path. The angle of the fan blade 5 is different when the fan blade 5 blows air to any point on the blowing path. The blowing angle is related to the blowing path and can be determined according to the blowing path.

[0061] Step S204: controlling the fan blades 5 to blow air to the impurity features along the blowing path according to the blowing angle and the filtering power so as to blow the impurity features to the periphery of the filter screen 4 .

[0062] After determining parameters such as the blowing angle of the fan blade 5 and the blowing path during blowing, the system controls the fan blade 5 to blow according to these parameters. The air entering the air filter can blow the impurity characteristics into the dust accumulation area around the filter net 4, and the air can also be filtered at the same time.

[0063] When the fan blade 5 blows air along the blowing path, the thickness of the impurity characteristics will change. At this time, the blowing parameters of the fan blade 5 need to be corrected. The correction method includes the following steps: Step S300: During the blowing process, the impurity coverage thickness on the blowing path is determined in real time according to the filter image and impurity characteristics.

[0064] As the fan blade 5 blows air in the circular area, the impurity features in the circular area will stack outward layer by layer, and the blowing parameters of the fan blade 5 need to be adjusted according to the different impurity coverage thickness. Therefore, when the fan blade 5 blows air, the impurity coverage thickness needs to be re-determined in real time.

[0065] Step S301: Match the blowing power of the fan blade 5 according to the impurity coverage thickness.

[0066] Blowing power refers to the power of the fan blade 5 to guide air to blow toward the impurities, which is expressed as the speed of the rotation of the fan blade 5. The blowing power is proportional to the thickness of the impurity cover. The thicker the impurity cover thickness, the greater the blowing power of the fan blade 5.

[0067] Step S302: Replace the filtering power with the blowing power.

[0068] The fan blades 5 initially guide the air with filtering power. When the impurity coverage thickness becomes larger, the filtering power is replaced with blowing power, so that the wind blown by the fan blades 5 can blow away the impurity characteristics.

[0069] Step S303: controlling the fan blades 5 to blow air along the blowing path according to the blowing power.

[0070] The impurity coverage thickness is collected in real time and the blowing power required by the fan blades 5 is determined in real time. The fan blades 5 are controlled to blow according to the blowing power so that the impurity features in the circular area can all be blown into the dust accumulation area.

[0071] Reference Figure 4 , the air contains a certain amount of moisture, and the moisture mixed with the impurity features may cause the impurity features to clump together, and at this time, the fan blade 5 may not be able to blow away the impurity features. When the fan blade 5 blows the impurity features along the blowing path but cannot remove the impurity features, the processing method includes the following steps: Step S400: after blowing, determine the thickness of impurities on the surface of the filter 4 according to the filter image and impurity characteristics.

[0072] The thickness of impurities after blowing refers to the thickness of impurities obtained by re-shooting and collecting by a camera after the impurity features cannot be removed by the initial blowing of the fan blades 5 .

[0073] Step S401: Based on the impurity thickness after blowing being consistent with the impurity coverage thickness before blowing, the position of the ridge point is determined according to the clearing radius of the circular area and a preset array point model.

[0074] If the thickness of the impurities after blowing is inconsistent with the thickness of the impurities before blowing, it means that the impurity characteristics have been removed and will not be repeated here.

[0075] If the thickness of the impurities after blowing is consistent with the thickness of the impurities before blowing, it means that blowing directly through the fan blades 5 cannot remove the impurity characteristics, and other methods are needed. In this embodiment, the filter screen 4 is lifted up by a lifting device at the bottom of the filter screen 4, and the filter screen 4 is raised. The impurity characteristics at the raised position are cracked, so that the impurity characteristics are split and softened for easy handling.

[0076] The array point model refers to a reference model for selecting points at raised positions within a clearing radius, wherein the raised points are distributed in an array. The array point model is set by a technician and will not be described in detail here.

[0077] The bulge position refers to the position where the surface of the filter screen 4 bulges when the filter screen 4 is lifted up by the lifting device.

[0078] The system can automatically and randomly generate array-distributed ridge point positions within a circular area according to the clearing radius and the array point model, and then the lifting device can lift the filter screen 4 according to the ridge point positions.

[0079] Step S402: matching the ridge height at the ridge point position according to the impurity coverage thickness.

[0080] The bulge height refers to the height of the filter screen 4 lifted by the lifting device. In order to split the impurity characteristics, the bulge height is set according to the impurity covering thickness. The thicker the impurity covering thickness, the higher the bulge height. The impurity covering thickness is proportional to the bulge height.

[0081] Step S403: According to the position of the ridge point and the ridge height, the lifting device preset under the filter screen 4 is controlled to lift the filter screen 4 to split the impurity features. After the position of the ridge point and the ridge height are determined, the lifting device can lift each ridge point position, so that the impurity features in the entire circular area can be cracked and become soft.

[0082] Step S404: controlling the fan blades 5 to blow the impurity features along the blowing path according to the blowing angle and the filtering power so as to blow the impurity features to the periphery of the filter screen 4 .

[0083] After the lifting device has completed lifting all the raised points, the fan blades 5 blow air to the circular area. The blowing method is the same as step S204 and will not be described in detail here.

[0084] After the lifting device lifts the impurity feature, in order to further soften the impurity feature, the fan blade 5 performs auxiliary blowing on the raised point position, and the auxiliary blowing method includes the following steps: Step S500: acquiring a bulge image at the bulge point position.

[0085] The uplift image refers to the image of the uplift point position obtained by the camera when the uplift device lifts the uplift point position. The camera will track each uplift point position, and when the uplift point position rises, the camera will immediately take a picture.

[0086] Step S501: determining the crack-intensive position in the circumferential direction of the uplift point according to the uplift image and preset crack features.

[0087] The crack feature refers to the cracks generated on the surface of the bulge after the impurity feature at the bulge point is bulged. The crack-intensive position refers to the position with the most cracks around the bulge point. The crack-intensive position can be obtained by comparing the bulge image and the crack feature.

[0088] Step S502: determining the auxiliary blowing angle of the fan blade 5 when blowing air toward the crack-dense location according to the crack-dense location and the preset fan blade position.

[0089] The fan blade position is the position where the fan blade 5 is installed in the air filter, which is a fixed standard value. At this time, the fan blade 5 is not in a descending state but in an initial position, which will not be described in detail here.

[0090] The auxiliary blowing angle refers to the direction angle of the fan blade 5 when the fan blade 5 blows air toward the raised point.

[0091] When the crack-intensive position and the blade position are determined, the auxiliary blowing angle of the blade 5 when blowing can also be determined. The angle between the line between the crack-intensive position and the blade position and the vertical direction is the auxiliary blowing angle.

[0092] Step S503: controlling the fan blades 5 to blow air to the crack-dense locations according to the auxiliary blowing angle to disperse the impurity features.

[0093] The surface cracks of the impurity features at the location where cracks are densely concentrated are the largest, and the impurity features are also softer. When the fan blades 5 blow air to the impurity features, the wind can enter the cracks, making the impurities softer and thus blown away.

[0094] Reference Figure 5 , when the impurity feature is separated and blown by the fan blade 5, if the impurity feature still cannot be removed, the processing method at this time includes the following steps: Step S600: after the fan blades 5 blow air to the impurity features of the bulges and splits, the thickness of the impurities on the surface of the filter 4 after blowing air is determined according to the filter image and the impurity features.

[0095] The thickness of impurities after the lifting and blowing refers to the thickness of impurities that cannot be removed after the impurities are lifted up by the lifting device and blown twice by the fan blades 5 and are captured by the camera again.

[0096] Step S601: Based on the consistency between the thickness of impurities after the raised air blowing and the thickness of impurities after the blowing, the descending height of the fan blade 5 is determined according to the preset fan blade position, the preset filter screen position and the thickness of impurities after the raised air blowing.

[0097] If the thickness of impurities after the bulge blowing is inconsistent with the thickness of impurities after blowing, it means that the impurity characteristics have been removed and will not be repeated here.

[0098] If the thickness of the impurities after the bulge and the thickness of the impurities after the blowing are the same, it means that the impurity feature cannot be removed after being lifted by the lifting device and blown by the fan blade 5. In this case, other methods are used to remove it. In this embodiment, the fan blade 5 is lowered to the surface of the impurity feature and the impurity feature is directly scraped off by the fan blade 5.

[0099] The filter screen position is the position where the filter screen 4 is installed in the air filter, which is a fixed standard value of the air filter structure and will not be described in detail here.

[0100] The drop height refers to the height distance that the fan blade 5 needs to drop to abut against the characteristic surface of the impurity. The distance between the fan blade position and the filter screen position can be determined, and then the difference between the distance between the two and the thickness of the impurity after the bulge is calculated to be the drop height.

[0101] Step S602: Match the abutment pressure of the fan blade 5 against the characteristic surface of the impurity according to the thickness of the impurity after the bulge blowing.

[0102] The abutment pressure refers to the pressure applied by the fan blade 5 to the impurity feature when the fan blade 5 abuts against the impurity feature surface. The abutment pressure is proportional to the thickness of the impurities after the bulge blowing. The thicker the impurities after the bulge blowing, the greater the abutment pressure. As the impurity features are removed and the thickness of the impurities after the bulge blowing becomes smaller, the abutment pressure will also decrease synchronously to prevent the fan blade 5 from damaging the surface of the filter 4.

[0103] Step S603: Determine the length adjustment amount of the blade 5 according to the clearing radius.

[0104] The blade length of the fan blade 5 can be adjusted, and the length adjustment amount is the adjustment amount of the blade length. The blade length of the fan blade 5 is based on the cleaning radius, so that the fan blade 5 can cover the entire circular area for cleaning.

[0105] Step S604: adjust the blades of the fan blade 5 according to the length adjustment amount, control the fan blade 5 to descend according to the descending height and abut against the characteristic surface of the impurity with abutting pressure.

[0106] When the impurity features are directly scraped off by the fan blades 5, the blade length of the fan blades 5 is first adjusted according to the length adjustment amount so that the fan blades 5 cover the entire circular area, and then the fan blades 5 are controlled to descend according to the descent height until they abut against the impurity features, and finally the abutment pressure applied by the fan blades 5 on the impurity features is adjusted.

[0107] Step S605: Control the fan blades 5 to rotate with a preset dust removal power to remove the impurities toward the circumference of the filter screen 4.

[0108] The dust removal power is the power of the fan blade 5 to move the impurity feature when the fan blade 5 directly contacts the impurity feature, which is set by the technician. The impurity feature can be moved with the dust removal power, and no further details are given here.

[0109] Reference Figure 6 In the above embodiment, the impurity features in the circular area are cleaned into the dust accumulation area by three methods. The impurity features in the dust accumulation area need to be cleaned. The method for cleaning the impurity features in the dust accumulation area includes the following steps: Step S700: Control the inner ring air duct 7 to be closed, and control the outer ring air duct 6 to be opened.

[0110] In this embodiment, the method for cleaning the impurity features in the dust accumulation area is: by cooling the air entering the air filter, when the air blows to the surface of the impurity features, the moisture in the air can condense and mix with the impurity features, and then the two are frozen together at low temperature to make the impurity features harden, and finally the impurity features are directly clamped out of the air filter.

[0111] In order to implement the above method, the inner diameter air duct is closed and the outer ring air duct 6 is opened. The fan blades 5 can blow air into the outer ring air duct 6, and the outer ring air duct 6 is directly opposite to the dust accumulation area.

[0112] Step S701: determining the dust thickness of the impurity characteristics blown to the dust accumulation area according to the filter image and the impurity characteristics.

[0113] The same as step S102, no further description is given here. The dust accumulation thickness refers to the thickness of the dust characteristics accumulated in the dust accumulation area.

[0114] Step S702: Based on the dust accumulation thickness being greater than the preset removal thickness, the preset refrigeration power of the refrigeration device is matched according to the preset freezing point temperature.

[0115] The cleaning thickness is a reference value set by technicians, which is used to measure whether the impurity characteristics in the dust accumulation area need to be cleared. When the dust accumulation thickness is greater than the cleaning thickness, cleaning is required, otherwise it is not required. It will not be elaborated here.

[0116] The freezing point temperature refers to the temperature at which impurities mixed with water can be frozen. The freezing point temperature is set by technicians based on actual physical conditions and will not be elaborated here.

[0117] The refrigeration device is arranged at the inlet of the air filter and is used to cool the air entering the air filter. The refrigeration power of the refrigeration device is set according to the freezing point temperature. The lower the freezing point temperature, the greater the refrigeration power.

[0118] Step S703: Control the fan blades 5 to blow air to the impurity features in the dust accumulation area through the outer ring air duct 6 with filtering power, and control the refrigeration device to cool the air entering the air filter to condense moisture in the air on the impurity features and freeze the impurity features.

[0119] The refrigeration device is controlled according to the filtering power to filter the air entering the air filter, and the air is guided by the fan blades 5 and blown from the outer ring air duct 6 to the impurity features in the dust accumulation area. When the impurity features encounter the low-temperature airflow, the moisture in the airflow can condense in the impurity features, so that the two are mixed, and when the two are mixed, they are frozen under low-temperature conditions.

[0120] Since the air needs to be cooled by the cooling tower after being filtered by the air filter, the air can also be pre-cooled in this step.

[0121] Step S704: Control the preset side door to open and control the preset clamping device to remove the impurity features frozen in the dust accumulation area.

[0122] The air filter is provided with a side door on the side wall, which corresponds to the position of the filter screen 4. When the side door is opened, the impurity features on the filter screen 4 can be cleared. When the impurity features in the dust accumulation area are cleared, the system controls the clamping device to directly clamp the impurity features. Since the impurity features have been frozen at this time, the impurity features will not be loose when the clamping device clamps the impurity features, so that the impurity features can be directly clamped out of the air filter by the clamping device.

[0123] The filter repair method includes the following steps: Step S800: determining the rupture position and rupture shape type according to the filter screen image, rupture features and reference points. The rupture shape types include linear and hole shapes.

[0124] The rupture position refers to the position where the rupture occurs on the filter screen 4. The rupture shape type refers to the shape of the rupture feature.

[0125] The image ratio when the camera captures the image can be determined based on the filter image and the reference point, and then the position of the rupture feature in the filter image can be determined based on the filter image and the rupture feature, and finally the actual rupture position of the rupture feature on the filter 4 can be determined based on the image ratio. The rupture shape type can be obtained by directly analyzing the filter image.

[0126] For linear fracture features and hole-shaped fracture features, the system will adopt different repair methods to repair them.

[0127] Step S801: Based on the line shape, determine the line trajectory according to the filter image and the rupture characteristics.

[0128] When the rupture feature is linear, since the filter screen 4 is only scratched without any substantial hole, in this embodiment, the scratched position is reconnected by freezing.

[0129] Linear trajectory refers to the path trajectory of the shape of the linear rupture feature. The linear trajectory can be directly analyzed through the filter image.

[0130] Step S802: Determine the following angle of the fan blade 5 when blowing along the linear trajectory according to the linear trajectory.

[0131] The following angle refers to the direction angle of the fan blade 5 when the fan blade 5 blows air along a linear trajectory. The method for determining the direction angle is the same as step S502 and will not be repeated here.

[0132] Step S803: Control the preset refrigeration device to cool the air entering the air filter, and control the fan blades 5 to blow along a linear trajectory according to the follow angle to condense and freeze the moisture in the air at the linear rupture of the filter screen 4.

[0133] By opening the inner ring air duct 7 and closing the outer ring air duct 6, the refrigeration device cools the air, and the fan blades 5 move along the linear trajectory to blow air. The moisture in the air can condense and freeze on the linear trajectory, thereby connecting the filter screens 4 on both sides of the linear trajectory.

[0134] Step S804: Based on the hole shape, the rupture area is determined according to the filter image and the rupture characteristics.

[0135] The rupture area refers to the area of ​​the hole-shaped rupture feature. The area of ​​the rupture feature in the filter image can be determined based on the filter image and the rupture feature, and the actual rupture area of ​​the rupture feature can be determined based on the image ratio.

[0136] For hole-shaped rupture features, the method in step S803 cannot be implemented due to the presence of holes. In this embodiment, the rupture feature area is first determined to determine whether the filter screen 4 still needs to be repaired.

[0137] Step S8051: Based on the rupture area being larger than the preset replacement area, a filter 4 replacement reminder is output.

[0138] The replacement area is a standard set by technicians to measure whether the cracked area needs to be repaired, which will not be elaborated here.

[0139] When the rupture area is larger than the replacement area, it means that the area of ​​the rupture feature is large and cannot be repaired at this time. The system will issue a prompt to notify the staff to directly replace the filter 4.

[0140] Step S8052: Based on the fact that the rupture area is not larger than the replacement area, the required covering area is determined according to the rupture area.

[0141] If the rupture area is not larger than the replacement area, the filter 4 can be temporarily repaired and used. The repair method in this embodiment is: select impurity features of a suitable area from the dust accumulation area, and blow them to the rupture position through the fan blade 5, and cover the rupture position with the impurity features.

[0142] The required covering area refers to the size of the impurity feature area required to cover the rupture feature. The required covering area is related to the rupture area, which is the sum of the rupture area and the preset connection area. The required covering area of ​​the impurity feature needs to be larger than the rupture area, and the connection area is the portion where the required covering area is larger than the rupture area.

[0143] Step S80521: Determine the repair impurity features and repair impurity positions that meet the area requirements in the dust accumulation area according to the required covering area and the filter image.

[0144] The patch impurity feature refers to the impurity feature selected from the dust accumulation area to cover the crack position. The patch impurity position refers to the position of the patch impurity feature in the dust accumulation area. By analyzing the impurity features of the dust accumulation area in the filter image, a patch impurity feature that meets the required covering area requirements can be obtained. When the patch impurity feature is selected, the position of the patch impurity feature in the filter image can be determined based on the filter image and the patch impurity feature, and the actual patch impurity position of the patch impurity feature can be determined based on the image ratio.

[0145] Step S80522: Control the fan blade 5 to blow the repair impurity feature from the repair impurity position to the rupture position to cover the rupture feature.

[0146] After determining the repair impurity characteristics, the repair impurity position and the rupture position, the system can control the fan blades 5 to blow the repair impurity characteristics of the repair impurity position to the rupture position.

[0147] When the impurity repair feature is located at the ruptured position, air is directly blown to the impurity repair feature through the method in step S803, so that the impurity repair feature is connected to the filter 4, and the ruptured position can be temporarily repaired.

[0148] In subsequent embodiments, it is necessary to determine the total area of ​​all repair impurity features in the filter 4. When the total area of ​​the repair impurity features is greater than a preset fixed value, the filter 4 needs to be replaced.

[0149] Based on the same inventive concept, an embodiment of the present invention provides a high-purity liquid oxygen production system based on air separation technology.

[0150] A high-purity liquid oxygen production system based on air separation technology includes the following modules: The acquisition module is used to acquire the filter screen image of the air filter inner cavity 1 and the bulge image at the bulge point position.

[0151] A memory is used to store a program for a method for preparing high-purity liquid oxygen based on air separation technology.

[0152] The program in the processor memory can be loaded and executed by the processor to realize a method for producing high-purity liquid oxygen based on air separation technology.

[0153] Based on the same inventive concept, an embodiment of the present invention provides an intelligent terminal, including a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executes a method for producing high-purity liquid oxygen based on air separation technology.

[0154] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A method for producing high-purity liquid oxygen based on air separation technology, characterized in that: include: Acquiring a preset filter screen image of an air filter inner cavity (1); Determine whether impurity features exist based on the filter screen image and a preset impurity feature library; Based on the existing impurity characteristics, the impurity coverage thickness is determined according to the filter screen image, the impurity characteristics and the preset reference points; Based on the impurity coverage thickness being greater than a preset reference filter thickness, cleaning the preset filter screen (4) using a filter cleaning method; After cleaning, determine whether there is a rupture feature based on the filter screen image and a preset rupture feature library; Based on the existence of the rupture feature, the filter (4) in the air filter is repaired using a filter repair method; Based on the impurity coverage thickness being greater than a preset reference filter thickness, the air filter is controlled to filter the raw air at a preset filter power so as to send the raw air into a preset cooling tower for pre-cooling and oxygen production.

2. The method for producing high-purity liquid oxygen based on air separation technology according to claim 1, characterized in that: The top of the air filter is an air inlet (2), and a fan blade (5) is rotatably provided at the air inlet (2), and the angle of the fan blade (5) is adjustable; the filter cleaning method comprises: Determine the filter radius based on the filter image; Determining the cleaning radius of a preset circular area in the center of the filter (4) that needs to be cleaned according to the filter radius and the dust accumulation width of the preset dust accumulation area; Generate a blowing path for the fan blade (5) to blow air according to the clearing radius and a preset spiral line model; Matching the blowing angle of the fan blade (5) according to the blowing path; The fan blades (5) are controlled according to the blowing angle and the filtering power to blow the impurity features along the blowing path so as to blow the impurity features to the periphery of the filter screen (4).

3. The method for producing high-purity liquid oxygen based on air separation technology according to claim 2, characterized in that: Also includes: During the blowing process, the thickness of impurities on the blowing path is determined in real time based on the filter image and impurity characteristics; Matching the blowing power of the fan blade (5) according to the impurity coverage thickness; Replace the filtering power with the blowing power; The fan blades (5) are controlled according to the blowing power to blow air along the blowing path.

4. The method for producing high-purity liquid oxygen based on air separation technology according to claim 2, characterized in that: The method further includes the following steps: controlling the fan blades (5) to blow air to the impurity features along the blowing path according to the blowing angle and the filtering power, so as to blow the impurity features to the periphery of the filter screen (4): After blowing, determining the thickness of impurities on the surface of the filter (4) after blowing according to the filter image and impurity characteristics; Based on the consistency between the thickness of impurities after blowing and the thickness of impurities covered before blowing, the position of the uplift point is determined according to the removal radius of the circular area and the preset array point model; Matching the ridge height at the ridge point location according to the impurity coverage thickness; According to the position of the bulge point and the bulge height, a lifting device preset below the filter screen (4) is controlled to lift the filter screen (4) to split the impurity characteristics; The fan blades (5) are controlled according to the blowing angle and the filtering power to blow the impurity features along the blowing path so as to blow the impurity features to the periphery of the filter screen (4).

5. The method for producing high-purity liquid oxygen based on air separation technology according to claim 4, characterized in that: Also includes: Acquire an uplift image at the uplift point location; Determine the crack concentration position around the uplift point according to the uplift image and the preset crack characteristics; Determining the auxiliary blowing angle of the fan blade (5) when blowing air toward the crack-dense location according to the crack-dense location and the preset fan blade position; The fan blades (5) are controlled according to the auxiliary blowing angle to blow air to the location where cracks are densely concentrated so as to disperse the impurity features.

6. The method for producing high-purity liquid oxygen based on air separation technology according to claim 4, characterized in that: The fan blade (5) is installed on the top of the air filter in a lifting manner, and the blade length of the fan blade (5) is telescopically adjustable; and further comprises: After the fan blades (5) blow air to the impurity features of the bulge and splitting, the thickness of the impurities on the surface of the filter screen (4) after the air blowing is determined according to the filter screen image and the impurity features; Based on the impurity thickness after the raised air blowing and the impurity thickness after the blowing being consistent, the descending height of the fan blade (5) is determined according to the preset fan blade position, the preset filter screen position and the impurity thickness after the raised air blowing; According to the thickness of the impurities after the impurities are blown up, the abutment pressure of the fan blade (5) when it abuts against the characteristic surface of the impurities is matched; Determining the length adjustment amount of the blade of the fan blade (5) according to the clearing radius; The blades of the fan blade (5) are adjusted according to the length adjustment amount, and the fan blade (5) is controlled to descend according to the descending height so as to abut against the characteristic surface of the impurity with abutting pressure; The fan blades (5) are controlled to rotate at a preset dust removal power to remove the impurities in the circumferential direction of the filter screen (4).

7. The method for producing high-purity liquid oxygen based on air separation technology according to claim 2, characterized in that: The top of the air filter has an outer ring air duct (6) and an inner ring air duct (7) arranged in a ring shape, the outer ring air duct (6) is located outside the inner ring air duct (7), and the outer ring air duct (6) and the inner ring air duct (7) can be used switchably; impurities in the dust accumulation area blown to the periphery of the filter screen (4) need to be removed, and the method for removing the impurities in the dust accumulation area includes: Controlling the inner ring air duct (7) to be closed, and controlling the outer ring air duct (6) to be opened; Determine the dust accumulation thickness of the impurity characteristics blown to the dust accumulation area according to the filter screen image and the impurity characteristics; Based on the dust accumulation thickness being greater than the preset removal thickness, matching the preset refrigeration power of the refrigeration device according to the preset freezing point temperature; Controlling the fan blades (5) to blow air to the impurity features in the dust accumulation area through the outer ring air duct (6) with filtering power, and controlling the refrigeration device to cool the air entering the air filter so as to condense moisture in the air on the impurity features and freeze the impurity features; The preset side door is controlled to open and the preset clamping device is controlled to take out the impurity features frozen in the dust accumulation area.

8. The method for producing high-purity liquid oxygen based on air separation technology according to claim 2, characterized in that: Filter repair methods include: Determine the rupture position and rupture shape type according to the filter screen image, rupture characteristics and reference points, and the rupture shape types include linear and hole shapes; Based on the line shape, the line trajectory is determined according to the filter image and the rupture characteristics; Determining, according to the linear trajectory, a following angle of the fan blade (5) when blowing air along the linear trajectory; Controlling a preset refrigeration device to cool the air entering the air filter, and controlling the fan blades (5) to blow air along a linear trajectory according to the follow angle so as to condense and freeze moisture in the air at the linear rupture of the filter screen (4); Based on the hole shape, the rupture area is determined according to the filter image and rupture characteristics; Output filter replacement reminder based on the rupture area being larger than the preset replacement area; Based on the fact that the cracked area is not larger than the replacement area, the required covering area is determined according to the cracked area; Determine the repair impurity features and repair impurity positions that meet the area requirements in the dust accumulation area according to the required covering area and the filter screen image; The fan blades (5) are controlled to blow the repair impurity feature from the repair impurity position to the rupture position to cover the rupture feature.

9. A high-purity liquid oxygen production system based on air separation technology, characterized in that: include: An acquisition module, used to acquire an image of a filter screen in the air filter inner cavity (1) and an image of a bulge at a bulge point; A memory for storing a program of a method for producing high-purity liquid oxygen based on air separation technology according to any one of claims 1 to 8; The program in the processor memory can be loaded and executed by the processor to realize a method for producing high-purity liquid oxygen based on air separation technology.

10. An intelligent terminal, characterized in that: The invention comprises a memory and a processor, wherein the memory stores a computer program which can be loaded by the processor and executed by the method for producing high-purity liquid oxygen based on air separation technology as claimed in any one of claims 1 to 8.

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