A refined management system for aluminum sheet, strip and foil rolling oil

Abstract

The present invention discloses a refined management system for rolling oil in aluminum sheet, strip, and foil. Each rolling mill is equipped with a rolling mill unit, or multiple adjacent rolling mills are equipped with a rolling mill unit. The multiple rolling mill units are centrally equipped with a diatomaceous earth unit, an additive unit, a blending oil / base oil unit, and a control unit. The diatomaceous earth unit, additive unit, and blending oil / base oil unit are connected to each rolling mill unit via pipelines. This system replaces the traditional manual, experience-based, independent replenishment of diatomaceous earth and additives, and rolling oil blending and replenishment operations at each rolling mill to a centralized, unified, and automated process. This enables centralized, unified, and refined management of rolling oil, which not only better ensures product quality, but also significantly reduces workload and saves human resources.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum plate, strip and foil rolling, and particularly relates to a refined management system for aluminum plate, strip and foil rolling oil. Background Art

[0002] The rolling process of aluminum sheet, strip, and foil requires the lubrication and cooling of rolling oil. Currently, most aluminum sheet and foil rolling mills use mineral oil as the base oil, supplemented with one or more additives. Due to variations in rolling mill and material, the use of rolling oil and additives must be tailored to the site environment. Furthermore, the rolling of aluminum sheet, strip, and foil continuously produces aluminum powder and oil-aluminum compounds. During the rolling process, the rolling oil is recycled, and some aluminum chips can enter the rolling oil. If these aluminum powders and impurities are not filtered out, they can clog the oil nozzles and cause roller marks. Diatomaceous earth is commonly used for this purpose.

[0003] The main functions of rolling oil are:

[0004] 1. Lubrication - reduce the friction between the roller and the aluminum sheet and foil, provide a stable friction interface, achieve stable rolling, and improve surface quality;

[0005] 2. Cooling - taking away the deformation heat and friction heat of the metal, adjusting the surface temperature of the roll and controlling the plate shape;

[0006] 3. Cleaning - clean the aluminum powder on the surface of the aluminum plate and foil and the saponification and aluminum powder in the rack.

[0007] Since waste oil treatment is a tedious and complex task, and can easily pollute the environment, in actual production, the quality of rolling oil must be stable and guaranteed to ensure product quality. Furthermore, by using diatomaceous earth for stirring and filtering, impurities can be removed while reusing the rolling oil as much as possible, thus reducing oil loss per unit of production.

[0008] Currently, the aluminum sheet, strip, and foil rolling industry generally adopts a rolling oil recycling method, which is to replace the oil after a period of recycling or after a certain output of products. The replacement and disposal of the oil are mainly based on experience, and generally, replacement is required after continuous operation for more than 10 days. The above traditional rolling oil management method has the following shortcomings:

[0009] 1. During the recycling of rolling oil, additives and blending oil / base oil are artificially added, resulting in large fluctuations in oil quality, especially the additive content, which affects the stability of product quality;

[0010] 2. Each rolling mill has independent circulation and independent replenishment of rolling oil, additives, and diatomaceous earth, which is labor-intensive, time-consuming, and labor-intensive. Summary of the Invention

[0011] In response to the above problems, the present invention designs a refined management system for aluminum sheet, strip and foil rolling oil. Through centralized and integrated management of rolling oil, additives and diatomaceous earth in the production line, the rolling oil can be stabilized and efficiently utilized, while reducing workload and saving human resources.

[0012] The present invention designs a refined management system for rolling oil of aluminum plates, strips and foils, including a rolling mill unit (also called a rolling mill rolling oil self-circulation unit, and the relevant device is mainly located near the rolling mill in the workshop), and the rolling oil is circulated, filtered and used between the rolling mill of the rolling mill unit and the oil tank inside the unit. The rolling mill unit includes a rolling mill clean oil tank, a rolling mill dirty oil tank and a filter, and the filter includes a plate filter. The self-circulation of the rolling oil of the rolling mill includes the clean oil (rolling oil) that meets the oil quality requirements after sampling and testing in the rolling mill clean oil tank flows to the rolling mill through a pipeline, and the dirty oil after rolling the aluminum plates, strips and foils enters the rolling mill dirty oil tank through a pipeline (an internal pipeline of the unit), and then enters the plate filter through the pipeline. The dirty oil is filtered by the plate filter to form clean oil that enters the rolling mill clean oil tank through a pipeline, so that the rolling oil of the rolling mill is recycled; the rolling oil includes any multiple of base oil, blending oil, recovered oil and regenerated oil, and the refined management of the rolling oil includes the management of various rolling auxiliary raw materials such as rolling oil, pure diatomaceous earth, white clay, cellulose, additives, etc.; it is characterized in that

[0013] Each rolling mill is provided with a rolling mill unit or multiple adjacent rolling mills are provided with a rolling mill unit. Two or more rolling mill units or at least one workshop are centrally provided with a diatomaceous earth unit, an additive unit, a blending oil / base oil unit and a control unit. The diatomaceous earth unit, the additive unit and the blending oil / base oil unit are connected to each rolling mill unit through pipelines.

[0014] The diatomaceous earth unit centrally completes diatomaceous earth mixing and is provided with at least one mixing tank. Based on the oil product test results or the filter's own status test results, the filters of all rolling mill units are connected via pipelines (including rolling oil diatomaceous earth pipelines) or connected via rolling mill diatomaceous earth storage tanks. The control unit delivers the stirred rolling oil diatomaceous earth mixture to the required rolling mill units via control valves and a dedicated pump (slurry delivery pump). For the sake of simplicity, the present invention uniformly represents pure diatomaceous earth, white clay, cellulose and other filter aids with diatomaceous earth in engineering practice. The ratio of each of the three in the rolling oil can be directly calculated based on the internal ratio of the filter aid.

[0015] The additive unit centrally processes additives and is equipped with at least one mixing tank, which is connected to all rolling mill units (clean oil tanks) through pipelines (including additive pipelines). The control unit transports processed (such as heated) additives to the required rolling mill units (clean oil tanks) through control valves and dedicated pumps (dosing pumps). Whether additives are added to the clean oil tanks of the rolling mill units depends mainly on the oil quality test results of the clean oil tanks, and is determined according to existing judgment rules such as threshold judgment rules or combined judgment rules.

[0016] The blending oil / base oil unit includes at least a base oil tank, which is connected to the rolling mill unit, the diatomaceous earth unit and the additive unit through valves and pipelines (blending oil / base oil pipelines), and is used to replenish new blending oil or base oil as needed to any multiple tanks / tanks among the rolling mill dirty oil tank, the rolling mill clean oil tank, the first centralized diatomaceous earth oil storage tank, the second centralized diatomaceous earth oil storage tank, and the third centralized diatomaceous earth oil storage tank of the diatomaceous earth unit, and the first centralized additive tank, the second centralized additive tank, and the third centralized additive tank of the additive unit.

[0017] A dedicated pump and / or valve is provided on the pipeline, and the control unit is electrically connected to the electronic control device of the dedicated pump and valve, and controls the start and stop of the dedicated pump, the valve switch and the switch value (i.e., the size of the switch opening and closing, which depends on the existing function of the valve, and the control unit outputs the corresponding switch value) through control instructions.

[0018] Furthermore, the valves include ball valves, stop valves, meter valves, control valves, and check valves. The ball valves include pneumatic ball valves, manual ball valves, and electromagnetic pneumatic ball valves. The specific type of valve installed on the pipeline and the location at which it is installed mainly depend on the on-site equipment conditions and are determined on-site based on the pipeline fluid quality requirements, automatic / manual control requirements, and the need for easy manual control operation, which is a conventional technology for engineering construction; the pipelines include at least recovered oil / regenerated oil pipelines, blending oil / base oil pipelines, rolling oil diatomaceous earth pipelines, additive pipelines, and dirty oil pipelines; the special pumps include metering pumps, slurry delivery pumps, pressure pumps, etc.

[0019] It should be noted that the naming of the pipelines in the present invention follows the traditional engineering practice of naming by key raw materials or functions, and their functions cannot be understood solely from the literal meaning. For example, the rolling oil diatomaceous earth pipeline, sometimes also called the diatomaceous earth pipeline, generally transmits a mixture of rolling oil, pure diatomaceous earth, white clay, and cellulose, or only transmits a mixture of rolling oil and any one of the three pure diatomaceous earth, white clay, and cellulose at a time. Mixtures with different components or mixing ratios can be designed for different pipelines for transmission, or they can be transmitted in batches / times through a shared pipeline, depending on the needs of each rolling mill; the additive pipeline generally transmits a mixture of additives and rolling oil. If the mixing ratio requirements of different rolling mills are different, they can be transmitted through separate pipelines or through a shared pipeline for batches / times; the other pipelines are set up and used in the same way as above.

[0020] Furthermore, the system also includes a full oil recovery unit, which includes an oil and gas recovery device, a recovery oil tank (also called a recovery clean oil tank), an air intake pipe, and a smoke collector; the smoke collector is installed near the rolling mill, generally above the rolling mill, in the area where oil and gas concentrate and rise, one end of the air intake pipe is connected to the smoke collector, and the other end is connected to the oil and gas recovery device, and the oil and gas recovery device is connected to the recovery oil tank through a pipe; the oil and gas volatiles in the rolling mill area are recovered by the full oil recovery unit to form recovered oil stored in the recovery oil tank, and the recovery oil tank is connected to the rolling mill unit (generally connected to the rolling mill dirty oil tank, and can also be connected to the filter or rolling mill clean oil tank) and / or the blending oil / base oil unit (generally a blending oil tank) through a valve, a recovery oil / regenerated oil pipeline.

[0021] Furthermore, the system also includes a distillation regeneration unit, which includes a distillation device, and an input-end distillation dirty oil tank (also called a regeneration dirty oil tank), an output-end waste oil tank and a distillation regeneration oil tank (also called a regeneration clean oil tank) connected to the distillation device through a pipeline. The regeneration oil tank is connected to the rolling mill unit (generally connected to the rolling mill dirty oil tank, and can also be connected to the filter or the rolling mill clean oil tank) and / or the blending oil / base oil unit (generally a blending oil tank) through a valve and a recovered oil / regenerated oil pipeline.

[0022] Furthermore, the blending oil / base oil unit further comprises a first blending oil tank and a second blending oil tank, which are generally used to store blending oil for the roughing and intermediate rolling mills, respectively. The finishing mill mainly uses base oil. The input end of the blending oil tank is connected to the recovery oil tank, the regeneration oil tank, and the base oil tank respectively through valves and pipelines, and the output end is connected to the rolling mill unit (generally connected to the rolling mill dirty oil tank, and can also be connected to a filter or a rolling mill clean oil tank or a corresponding rolling mill blending oil tank) and / or the diatomaceous earth unit and the additive unit through a pump, a valve and a blending oil / base oil pipeline;

[0023] The input and output ends of the blending oil tank are interconnected through an interconnecting pipeline. A valve and a pressure pump are provided on the interconnecting pipeline. By closing the external input and output valves of the blending oil tank, opening the valve on the interconnecting pipeline, and starting the pressure pump, the blending oil in the blending oil tank can be pumped back from the output end to the input end, forming an internal circulation, thereby achieving uniform blending of the blending oil.

[0024] Furthermore, the diatomaceous earth unit includes a first centralized diatomaceous earth oil storage tank and a second centralized diatomaceous earth oil storage tank, which store diatomaceous earth stirred with base oil or blending oil (referred to as rolling oil diatomaceous earth or rolling oil diatomaceous earth mixture in the present invention), wherein the first and second centralized diatomaceous earth oil storage tanks correspond to the finished rolling mill (finishing rolling mill) rolling oil diatomaceous earth oil storage tank and the roughing and medium rolling mill rolling oil diatomaceous earth oil storage tank respectively; in addition to the function of adding and stirring diatomaceous earth, the diatomaceous earth unit also has the function of adding and stirring activated white clay and the like; the additive unit includes a first centralized additive tank and a second centralized additive tank, considering that pure additives are not easy to be mixed in the pipeline For transmission, the additives are generally dissolved in base oil or blending oil first, and corresponding heating devices and other auxiliary devices are set up simultaneously. These are all conventional technologies; the first and second additive tanks respectively store additives for finished rolling mills (finishing rolling mills) and roughing and medium rolling mills; the centralized diatomaceous earth oil storage tank and the centralized additive tank can directly supply rolling oil diatomaceous earth and additives to the rolling mill unit on demand through pumps, valves and pipelines, and can also provide rolling oil diatomaceous earth and additives to the rolling mill filter and the rolling mill clean oil tank respectively through the transition rolling mill diatomaceous earth oil storage tank and the rolling mill additive tank of the rolling mill unit; the additive unit is also designed with an additive residual liquid collection barrel.

[0025] It should be noted that the naming of the oil tanks / boxes of the present invention also adopts the engineering tradition of naming by key raw materials or functions, and its function cannot be understood only from the literal meaning. For example, diatomaceous earth oil storage tanks, sometimes also called rolling oil diatomaceous earth oil storage tanks, generally store a mixture of rolling oil, pure diatomaceous earth, white clay, and cellulose, or only store a mixture of rolling oil and any one of pure diatomaceous earth, white clay, and cellulose. Mixtures with different components or mixing ratios can be designed to be stored in different oil tanks / boxes, or they can be stored in a shared oil tank / box in batches / times, depending on the needs of each rolling mill; additive tanks / boxes generally store a mixture of additives and rolling oil. When different rolling mills have different mixing ratio requirements, they can be stored in separate tanks / boxes, or in a shared tank / box in batches / times; the settings and uses of other tanks / boxes are the same as above.

[0026] Furthermore, the diatomaceous earth unit also includes a third centralized diatomaceous earth oil storage tank, and the additive unit also includes a third centralized additive tank; the third centralized diatomaceous earth oil storage tank is a spare tank for the first centralized diatomaceous earth oil storage tank and the second centralized diatomaceous earth oil storage tank, and the third additive tank is a spare tank for the first centralized additive tank and the second centralized additive tank; the blending oil / base oil unit also includes a finishing oil storage tank; the rolling mill unit also includes several rolling mill base oil / blending oil tanks.

[0027] Furthermore, the rolling mill unit includes a first rolling mill diatomite oil storage tank and a second rolling mill diatomite oil storage tank, and the rolling mill diatomite oil storage tanks are connected to the filters of the rolling mill units through valves and pipelines; slurry delivery pumps are respectively provided at the outlets of the centralized diatomite oil storage tanks, and are respectively connected to different rolling mill diatomite oil storage tanks through valves and rolling oil diatomite pipelines; a compressed air purge interface is provided on the rolling oil diatomite pipeline for purging residual rolling oil diatomite in the rolling oil diatomite pipeline; the rolling mill unit also includes a first rolling mill additive tank and a second rolling mill additive tank, and the output ends of the rolling mill additive tanks are output through dedicated pumps and are connected to the clean oil tank and / or dirty oil tank of the rolling mill unit through valves and pipelines; metering pumps are respectively provided at the outlets of the centralized additive tanks, and are then respectively connected to different rolling mill additive tanks through valves and additive pipelines; a compressed air purge interface is provided on the additive pipeline for purging residual additives in the additive pipeline. For systems without mill diatomite oil storage tanks, centralized diatomite oil storage tanks are generally directly connected to mill filters through pipelines, valves and slurry delivery pumps; for systems with mill additive tanks, centralized additive tanks are connected to the clean oil tank and / or dirty oil tank of the mill unit through pipelines, valves and metering pumps.

[0028] Furthermore, the control unit also includes several sensors including a liquid level meter, a thermometer, a pressure meter, and a flow meter; the control unit is electrically connected to the oil quality detection equipment (including a network connection) to obtain oil quality detection result information.

[0029] The advantages and beneficial effects of the present invention are: the refined management system for aluminum plate and strip foil rolling oil designed by the present invention, on the one hand, addresses the problem that in the traditional aluminum plate and strip foil rolling process, each rolling mill independently manages rolling oil, including rolling oil blending, diatomaceous earth stirring and replenishing, additive heating and replenishing, etc., and each rolling mill requires manual maintenance operations. The present invention centrally processes and stores diatomaceous earth, additives, and rolling oil, and transmits them to each rolling mill unit through dedicated pipelines. From the perspective of rolling oil management alone, with the traditional method, one person can generally maintain 3 to 5 rolling mills at the same time, while with the present invention, one person can maintain an average of 15 to 20 rolling mills at the same time, and work efficiency is improved by 3 to 5 times, which greatly reduces the workload and saves human resources. On the other hand, it can realize the refined management of rolling oil, changing the composition adjustment of rolling oil from once every ten days to half a month to precise adjustment every day, and changing the oil adjustment based on experience in the past to real-time dynamic adjustment of oil, avoiding the phenomenon of large fluctuations in rolling oil composition caused by excessive concentration of additives, and maintaining the performance of rolling oil in a more stable state for aluminum plate, strip and foil processing, which can further improve product quality and increase the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a connection diagram of a refined management system for aluminum sheet, strip, and foil rolling oil;

[0031] Figure 2 yes Figure 1 Enlarged schematic diagram of the rolling mill unit;

[0032] Figure 3 yes Figure 2 Schematic diagram of local piping and valve connections for waste oil discharge from rolling mill;

[0033] Figure 4 yes Figure 1 Enlarged schematic diagram of diatomite unit;

[0034] Figure 5 yes Figure 1 Enlarged schematic diagram of the additive unit;

[0035] Figure 6 yes Figure 1 Enlarged schematic diagram of blending oil / base oil unit;

[0036] Figure 7 yes Figure 1 Enlarged schematic diagram of the full oil recovery unit;

[0037] Figure 8 yes Figure 1 Enlarged schematic diagram of the distillation regeneration unit;

[0038] Figure 9 yes Figures 1 to 8 Example diagram of sensor symbols such as valves and level gauges.

[0039] The following are marked in the figure:

[0040] Rolling mill 1, rolling mill unit 2, diatomaceous earth unit 3, additive unit 4, blending oil / base oil unit 5, control unit 6, full oil recovery unit 7, distillation regeneration unit 8;

[0041] Rolling mill clean oil tank 2.1, rolling mill dirty oil tank 2.2, filter 2.3, dirty oil pipeline 2.4, first rolling mill diatomaceous earth oil storage tank 2.5, second rolling mill diatomaceous earth oil storage tank 2.6, first rolling mill additive tank 2.7, second rolling mill additive tank 2.8;

[0042] The first centralized diatomite oil storage tank 3.1, the second centralized diatomite oil storage tank 3.2, the third centralized diatomite oil storage tank 3.3, and the rolling oil diatomite pipeline 3.4;

[0043] First centralized additive tank 4.1, second centralized additive tank 4.2, third centralized additive tank 4.3, additive pipeline 4.4;

[0044] Base oil tank 5.1, first blending oil tank 5.2, second blending oil tank 5.3, blending oil / base oil pipeline 5.4, finishing oil storage tank 5.5;

[0045] Oil vapor recovery device 7.1, oil recovery tank 7.2, air intake pipe 7.3, smoke collector 7.4, oil recovery / regeneration oil pipeline 7.5;

[0046] Distillation device 8.1, distillation waste oil tank 8.2, output end waste oil tank 8.3, distillation regeneration oil tank 8.4. DETAILED DESCRIPTION

[0047] The following embodiments are further described in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0048] The rolling of aluminum sheet, strip, and foil continuously produces aluminum powder and oil-aluminum compounds. The rolling oil is recycled during the rolling process, and some aluminum shavings can also enter the oil. If not filtered out, these aluminum powders and impurities can clog the oil nozzles and cause roller marks. The amount of aluminum powder generated during aluminum sheet, strip, and foil rolling is related to the number of passes, the amount of reduction, and the state of the incoming material. The basic rule is that the greater the reduction, the more aluminum powder is generated; the rougher the rolls, the more aluminum powder is generated; the higher the incoming material annealing temperature and the thinner the thickness of the annealing pass, the more aluminum powder is generated; the higher the oil temperature, the more aluminum powder is generated; and the faster the rolling speed, the more aluminum powder is generated.

[0049] The production of one ton of pure aluminum plate can generate 5-20mg / ㎡ of aluminum powder. Small particles in the rolling oil will cause pinholes in the aluminum plate and foil. Adhesive aluminum particles below 8µm are the main cause of blackening of rolling oil.

[0050] Diatomaceous earth is a soft, chalky powder with diverse shapes, high porosity, low density, large specific surface area, relative incompressibility, chemical stability, insolubility, and a certain degree of adsorption. This diatomaceous earth undergoes drying, pulverization, calcination, air separation, and grading to become the final inert filter aid. Its primary component is amorphous silicon dioxide. The diatomaceous earth filter aid forms a solid, stable, porous filter cake on the filter medium, filtering out impurities from the liquid for solid-liquid separation and clarification. The diatomaceous earth filter aid undergoes scientific and rigorous processing controls, ensuring it does not alter the composition of the filtrate and has no effect on the taste of the filtrate before or after filtration.

[0051] Mineral base oils are mostly composed of non-polar molecules, which have poor adsorption capacity on metal surfaces and generally require additives. While increasing the number of carbon chains improves lubrication, the base oil's friction coefficient decreases and its viscosity increases, this also reduces the surface gloss of the strip or foil after annealing, affecting surface quality. Therefore, additives are often added to the base oil.

[0052] The present invention is to unify and centrally design the operations of rolling oil blending and replenishing, diatomaceous earth stirring and replenishing, additive mixing (including heating) and replenishing (collectively referred to as rolling oil management in the present invention) in the traditional aluminum plate, strip and foil rolling process, and realize refined management. Example 1

[0053] like Figure 1 As shown, the present invention designs a refined management system for rolling oil of aluminum sheet, strip and foil, including a rolling mill unit 2 (also called a rolling mill rolling oil self-circulation unit, and the related device is mainly located near the rolling mill in the workshop). The rolling oil is circulated, filtered and used between the rolling mill of the rolling mill unit and the oil tank inside the unit. Each rolling mill 1 is respectively provided with a rolling mill unit or multiple adjacent rolling mills are provided with a rolling mill unit. Generally, 2 to 4 rolling mills share one rolling mill unit. Diatomaceous earth unit 3, additive unit 4, blending oil / base oil unit 5 and control unit 6 are centrally provided for two or more rolling mill units or at least one workshop. The diatomaceous earth unit, additive unit and blending oil / base oil unit are respectively connected to each rolling mill unit through pipelines; the rolling oil includes any multiple types of base oil, blending oil, recovered oil and regenerated oil; as shown Figure 1 As shown, in this embodiment, each rolling mill is provided with a rolling mill unit, and a set of diatomaceous earth unit, additive unit, blending oil / base oil unit and control unit are centrally provided for all workshops in the factory. Considering the clarity of the drawing, Figure 1 Only one rolling mill unit is shown. Generally, the refined management system for aluminum sheet, strip and foil rolling oil includes at least two rolling mill units to achieve the significance of centralized management.

[0054] like Figure 2 As shown, the rolling mill unit 2 includes a rolling mill clean oil tank 2.1, a rolling mill dirty oil tank 2.2, and a filter 2.3. The filter includes a plate filter. The rolling mill rolling oil self-circulation includes the clean oil (rolling oil) that meets the oil quality requirements after sampling and testing in the rolling mill clean oil tank flowing to the rolling mill through a pipeline. After the aluminum plate and foil are rolled, the dirty oil enters the rolling mill dirty oil tank through a pipeline (an internal pipeline of the unit), and then enters the plate filter through the pipeline. The dirty oil is filtered by the plate filter to form clean oil that enters the rolling mill clean oil tank through a pipeline. In this way, the rolling mill rolling oil is completed. Recycling; Generally, the dirty oil tank and clean oil tank of a rolling mill are separated by a partition in the middle of the box, also known as the dirty oil side and the clean oil side respectively. This design is an automatic overflow design. When the liquid level on the clean oil side of the rolling mill exceeds the height of the partition, it automatically overflows to the dirty oil side. If the oil level on the clean oil side is too low, the dirty oil (including the added new oil) needs to be replenished from the dirty oil side through the filter to the clean oil side. If the oil level on the dirty oil side is too low (such as below 30%), the machine needs to be stopped for inspection. If it is too high (such as above 70%), it needs to be discharged. Generally, oil replenishment can be stopped when it reaches 60%;

[0055] like Figure 4As shown, the diatomaceous earth unit 3 centrally completes the diatomaceous earth mixing, and a mixing tank is set up. According to the oil test results or the filter's own status test results, the filters of all rolling mill units are connected through pipelines (rolling oil diatomaceous earth pipelines 3.4) or connected to the filters through the rolling mill diatomaceous earth oil storage tank. The control unit controls the valve and a dedicated pump (slurry delivery pump) to deliver the stirred rolling oil diatomaceous earth mixture to the required rolling mill units. The plate filter is a finished product and generally has a function to monitor the status or effect of the filter paper. When the original filter paper covering the diatomaceous earth is basically ineffective, it will automatically or prompt to replace the filter paper. After replacing the new filter plate paper, it is necessary to re-inject the stirred rolling oil diatomaceous earth into the filter so that the diatomaceous earth evenly covers the surface of the filter plate paper. Until it reaches a certain thickness, it plays the role of filtering dirty oil, and then the rolling oil circulation process continues; the replacement of filter paper in the plate filter is determined according to the osmotic pressure of the plate. Usually the filtration pressure exceeds 3.8 bar, and it is assumed by default that the filter needs to be cleaned and the paper needs to be replaced; for the sake of simplicity of description, the present invention uniformly represents pure diatomaceous earth, kaolin, cellulose and other filter aids with diatomaceous earth, the main component in engineering practice. The ratio of each of the three in the rolling oil can be directly calculated according to the internal ratio of the filter aid. For example, the rolling oil and the filter aid (diatomaceous earth in the text) are in a 1:1 ratio, and the ratio of pure diatomaceous earth, kaolin and cellulose in the filter aid is 3.5:1.5:1, then the ratio of rolling oil, pure diatomaceous earth, kaolin and cellulose in the mixture is 6:3.5:1.5:1.

[0056] like Figure 5 As shown, the additive unit 4 centrally processes additives and is equipped with a mixing tank, which is connected to all rolling mill units (clean oil tanks) through pipelines (including additive pipelines). The control unit controls valves and a dedicated pump (dosing pump) to deliver processed (e.g., heated) additives to the required rolling mill units (clean oil tanks). Whether additives are added to the clean oil tanks of the rolling mill units depends mainly on the oil quality test results of the clean oil tanks, and is determined according to existing judgment rules such as threshold judgment rules or combined judgment rules.

[0057] like Figure 6 As shown, the blending oil / base oil unit 5 includes at least a base oil tank 5.1, which is connected to the rolling mill unit, the diatomaceous earth unit and the additive unit through valves and pipelines (including the blending oil / base oil pipeline). The base oil tank is used to replenish new blending oil or base oil as needed to any tank / tank among the rolling mill unit's dirty oil tank 2.2, the rolling mill clean oil tank 2.1, the diatomaceous earth unit's mixing tank, and the additive unit's mixing tank.

[0058] A dedicated pump and / or valve is provided on the pipeline, and the control unit 6 is electrically connected to the electronic control device of the dedicated pump and valve, and controls the start and stop of the dedicated pump, the valve switch and the switch value (i.e., the size of the switch opening and closing, which depends on the existing function of the valve, and the control unit outputs the corresponding switch value) through control instructions; the embodiment in the accompanying drawings only illustrates the electrical connection between the control unit and other units, and the electrical connection diagram of the control unit and various controllable devices is not shown. This technology is a mature technology, such as the switch control of dedicated pumps and ball valves, and the information collection of detection devices or equipment such as thermometers, pressure gauges (meters), liquid level gauges, flow meters, and oil detection equipment.

[0059] The configuration of each sensor and controllable device is not described in further detail in this invention, mainly because this type of connection configuration is common and can be designed as needed. Here, it is important to grasp the following principles:

[0060] ① If the liquid storage in various tanks / containers requires quantitative measurement, a liquid level gauge should be installed in the tank / container;

[0061] ② If there are temperature requirements for various tanks / boxes or pipelines, corresponding thermometers should be installed;

[0062] ③ For various tanks / boxes that require control over the amount of liquid output, a flow meter or a weighing device is installed on the output pipeline; for tanks / boxes that require control over the amount of liquid input, a flow meter or a weighing device is generally also installed on the input pipeline;

[0063] ④ If the liquid output of various tanks / boxes requires a certain power or pressure, a special pump shall be installed at the output port, and a pressure gauge or pressure gauge shall be installed on the pipeline as appropriate;

[0064] ⑤ If the pipeline needs to prevent backflow, a check valve or a stop valve should be installed, and the pressure gauge should be equipped with a gauge valve. If the pipeline needs flow control and / or switching between different fluids, a ball valve, a control valve, and a check valve can be installed at the same time.

[0065] Preferably, the valves include ball valves, stop valves, meter valves, control valves, and check valves. The ball valves include pneumatic ball valves, manual ball valves, and electromagnetic pneumatic ball valves. The specific type of valve installed on the pipeline and the location at which it is installed mainly depend on the on-site equipment conditions and are determined on-site based on the pipeline fluid quality requirements, automatic / manual control requirements, and the need for easy operation of manual control, which is a conventional technology for engineering construction; the pipeline includes a recovered oil / regenerated oil pipeline 7.5, a blending oil / base oil pipeline 5.4, a rolling oil diatomaceous earth pipeline 3.4, an additive pipeline 4.4, and a dirty oil pipeline 2.4; the special pumps include a metering pump, a slurry delivery pump, and a pressure pump; generally, a slurry delivery pump is mainly used for delivering rolling oil diatomaceous earth mixtures, the metering pump is mainly used for delivering rolling oil additive mixtures, and the pressure pump is mainly used for delivering various oils such as blending oil / base oil. Here, they are only distinguished according to function, and they can also be used interchangeably in actual projects.

[0066] Preferably, the control unit further includes at least one sensor selected from the group consisting of a liquid level gauge, a thermometer, a pressure gauge, and a flow meter; the control unit is electrically connected to the oil quality detection equipment (including a network connection) to obtain information on the oil quality detection results; in this embodiment, each oil tank is provided with a liquid level gauge for oil level detection, and a pressure gauge is provided at the output end of each dedicated pump for pump pressure monitoring; a thermometer is provided at the additive tank for temperature monitoring; a flow meter is provided on the output pipeline of the recovery oil tank, the regeneration oil tank, the base oil tank, the blending oil tank, and the rolling mill clean oil tank for output flow monitoring. Example 2

[0067] The difference from Example 1 is that this embodiment further refines the design of the diatomaceous earth unit 3, the additive unit 4, and the blending oil / base oil unit 5 to facilitate engineering applications.

[0068] like Figure 4 As shown, the diatomaceous earth unit includes a first centralized diatomaceous earth oil storage tank (3.1) and a second centralized diatomaceous earth oil storage tank (3.2), which store diatomaceous earth stirred with base oil or blending oil (referred to as rolling oil diatomaceous earth or rolling oil diatomaceous earth mixture in the present invention), wherein the first and second centralized diatomaceous earth oil storage tanks correspond to the finished rolling mill (finishing rolling mill) rolling oil diatomaceous earth oil storage tank and the roughing and medium rolling mill rolling oil diatomaceous earth oil storage tank, respectively; in addition to the function of adding and stirring diatomaceous earth, the diatomaceous earth unit also has the function of adding and stirring activated clay, cellulose, etc. Generally, according to the demand for diatomaceous earth of different types of rolling mills, rolling oil, pure diatomaceous earth, clay and cellulose are pre-stirred in a fixed ratio, and transported to the diatomaceous earth oil storage tank of the corresponding rolling mill through a pipeline as planned, and finally the pipeline is purged with compressed air to ensure quantitative transmission without affecting the next transmission; as shown Figure 5As shown, the additive unit includes a first centralized additive tank (4.1) and a second centralized additive tank (4.2). Considering that pure additives are not easy to be transported in pipelines, the additives are generally dissolved in base oil or blending oil first, and corresponding auxiliary devices such as heating devices are set up simultaneously. These are all conventional technologies; the first and second additive tanks respectively store additives for finished rolling mills (finishing rolling mills) and roughing and medium rolling mills; the centralized diatomaceous earth oil storage tank and the centralized additive tank can directly supply rolling oil diatomaceous earth and additives to the rolling mill unit on demand through pumps, valves and pipelines, and can also provide rolling oil diatomaceous earth and additives to the rolling mill filter and the rolling mill clean oil tank respectively through the intermediate rolling mill diatomaceous earth oil storage tank and the rolling mill additive tank of the rolling mill unit; the additive unit is also designed with an additive residual liquid collection barrel.

[0069] like Figure 6 As shown, the blending oil / base oil unit of this embodiment further includes a first blending oil tank 5.2 and a second blending oil tank 5.3, which are generally used to store blending oil for the roughing and intermediate rolling mills, respectively. The finishing mill primarily uses base oil. The input end of the blending oil tank is connected to the recovery oil tank 7.2, the regeneration oil tank 8.4, and the base oil tank 5.1 via valves and pipelines, respectively. The output end is connected to the rolling mill unit (generally connected to the rolling mill dirty oil tank, but may also be connected to a filter, a rolling mill clean oil tank, or a corresponding rolling mill blending oil tank) and / or the diatomaceous earth unit, and the additive unit via a pump, valves, and the blending oil / base oil pipeline 5.4. The blending oil tank proportionally mixes recovered full oil, regenerated oil, and newly purchased base oil to produce blending oil, which is used to replenish new oil to the rolling mill unit and supply stirring oil to the diatomaceous earth unit or additive unit.

[0070] The input and output ends of the blending oil tank are interconnected through an interconnecting pipeline. Valves and a dedicated pump (pressure pump) are provided on the interconnecting pipeline. By closing the external input and output valves of the blending oil tank, opening the valve on the interconnecting pipeline, and starting the pressure pump, the blending oil in the blending oil tank can be pumped back from the output end to the input end, forming an internal circulation and achieving uniform blending of the blending oil. Example 3

[0071] The difference from Example 2 is that the system of this embodiment further includes a full oil recovery unit 7, such as Figure 7As shown, the full oil recovery unit includes an oil vapor recovery device 7.1, a recovery oil tank 7.2 (also called a recovery clean oil tank), an air intake pipe 7.3, and a smoke collector 7.4; the smoke collector is installed near the rolling mill, generally above the rolling mill, in an area where oil vapor concentrates and rises; one end of the air intake pipe is connected to the smoke collector, and the other end is connected to the oil vapor recovery device, and the oil vapor recovery device is connected to the recovery oil tank via a pipe; the oil vapor volatiles in the rolling mill area are recovered by the full oil recovery unit to form recovered oil, which is stored in the recovery oil tank, and the recovery oil tank is connected to the rolling mill unit (generally connected to the rolling mill dirty oil tank, but can also be connected to a filter or rolling mill clean oil tank) and / or the blending oil / base oil unit (generally a blending oil tank) via a valve and a recovery oil / regenerated oil pipe 7.5; as shown Figure 1 and Figure 7 As shown, the output connection of the oil recovery tank in this embodiment is switched by a valve switch, and can be connected to the blending oil / base oil unit or the rolling mill unit; the recovered oil does not contain impurities, and the oil quality is close to the base oil, and is used for blending and / or optimizing the quality of the waste oil of the rolling mill; there are several smoke collectors, which are respectively deployed in different smoke concentration areas above the rolling mill, and there are no less than one oil and gas recovery device and oil recovery tank, and several suction pipes; the oil and gas recovery device generally includes an absorption tower, degassing equipment, vacuum separation equipment, etc.

[0072] Preferably, the system further comprises a rectification and regeneration unit 8, such as Figure 8 As shown, the distillation regeneration unit includes a distillation device 8.1, an input-end distillation dirty oil tank 8.2 (also called a regeneration dirty oil tank), an output-end waste oil tank 8.3, and a distillation regeneration oil tank 8.4 (also called a regeneration clean oil tank) connected to the distillation device via pipelines. The regeneration oil tank is connected to the rolling mill unit (generally connected to the rolling mill dirty oil tank, but can also be connected to a filter or rolling mill clean oil tank) and / or the blending oil / base oil unit (generally a blending oil tank) via a valve and a recovery oil / regeneration oil pipeline 7.5. The clean oil tank of the rolling mill unit is sampled and tested. When the oil product exceeds the index threshold, as shown in FIG. Figure 3 As shown, the control unit or manual control closes valve MV105, opens valves MV106, MV107, and MV108, starts oil pump MP101, and transports the heavily contaminated rolling mill waste oil through waste oil pipeline 2.4 to the distillation waste oil tank 8.2 (at the same time, the distillation waste oil tank input valve RV101A also needs to be opened). Figure 3(not shown in the figure), DN65 and DN50 are pipe diameters; compared with oil and gas recovery oil, recycled oil (also known as distilled oil) is closer to base oil and is used for blending and / or optimizing the quality of waste oil from rolling mills; after centralized collection, waste oil can be reused by itself or supplied to downstream industries as appropriate; this effectively improves the recycling rate of rolling oil, avoids waste oil waste, and significantly improves energy conservation and environmental protection of the system; conductivity sensors are generally installed on the recycled oil / regenerated clean oil tank pipeline to monitor static charge in the oil circuit at any time and provide timely feedback to the control system, adjusting the content of additives in the mixing tank and / or releasing some charge to ensure production safety; Figure 8 In addition to being connected to the distillation unit, the waste oil outlet of the intermediate distillation waste oil tank is also connected to the recovered oil / regenerated oil pipeline through a valve. It is mainly used to provide a transmission pipeline for the direct reuse of recovered waste oil. For example, the waste oil from the finishing mill can be directly used for blending as rolling oil for the roughing and intermediate rolling mills. Example 4

[0073] The difference from Example 2 is that this embodiment takes into account the possibility of variables in the types of rolling oil used in the finishing mill, and the blending oil / base oil unit is also designed with a separate finishing oil storage tank 5.5 for system backup.

[0074] The rolling mill unit is equipped with small oil tanks / cans, including a small finishing oil tank (rolling mill base oil tank), an intermediate blending oil tank, and a roughing blending oil tank (not shown in the figure, this is the traditional rolling oil tank configuration for aluminum sheet, strip, and foil rolling). These are collectively referred to as the mill base oil / blending oil tanks. These tanks correspond to the base oil tank, first blending oil tank, and second blending oil tank connected to the blending oil / base oil unit, or the intermediate blending oil tank and roughing blending oil tank are combined into one, and used in combination. By switching the interconnection between the different oil tanks via valves, the rolling mill's rolling oil demand can be directly buffered by the local oil tanks. The above design mainly takes into account the fact that the pipe line is too long, making it difficult to manage in a refined manner; and the different oil products for roughing, finishing, and intermediate rolling, or the different oil product requirements for finishing and roughing intermediate rolling, or the fact that the oil product requirements for roughing intermediate rolling are similar. Example 5

[0075] The difference from Example 3 is that this embodiment takes into account the possibility of variables in the types of rolling oil used in the finishing mill, and the blending oil / base oil unit is also designed with a separate finishing oil storage tank 5.5 for system backup.

[0076] The rolling mill unit is equipped with small oil tanks / cans, including a small finishing oil tank (rolling mill base oil tank), an intermediate blending oil tank, and a roughing blending oil tank (not shown in the figure, this is the traditional rolling oil tank configuration for aluminum sheet, strip, and foil rolling). These are collectively referred to as the mill base oil / blending oil tanks. These tanks correspond to the base oil tank, first blending oil tank, and second blending oil tank connected to the blending oil / base oil unit, or the intermediate blending oil tank and roughing blending oil tank are combined into one, and used in combination. By switching the interconnection between the different oil tanks via valves, the rolling mill's rolling oil demand can be directly buffered by the local oil tanks. The above design mainly takes into account the fact that the pipe line is too long, making it difficult to manage in a refined manner; and the different oil products for roughing, finishing, and intermediate rolling, or the different oil product requirements for finishing and roughing intermediate rolling, or the fact that the oil product requirements for roughing intermediate rolling are similar. Example 6

[0077] The difference from Example 5 is that the diatomaceous earth unit of this embodiment further includes a third centralized diatomaceous earth storage tank 3.3, and the additive unit further includes a third centralized additive tank 4.3; the third centralized diatomaceous earth storage tank 3.3 is a backup tank for the first centralized diatomaceous earth storage tank 3.1 and the second centralized diatomaceous earth storage tank 3.2, and the third additive tank is a backup tank for the first centralized additive tank 4.1 and the second centralized additive tank;

[0078] There is another way to use the three centralized diatomaceous earth storage tanks (although the names are not completely consistent with the subsequent uses, the original names are retained for the sake of consistency and to respect engineering practices as much as possible), that is, the three storage tanks are separately mixed with pure diatomaceous earth, kaolin, and cellulose with rolling oil in a fixed proportion, and then the rolling oil diatomaceous earth mixture, rolling oil kaolin mixture, and rolling oil cellulose mixture are quantitatively transmitted according to the demand ratio according to the needs of different rolling mills for rolling oil diatomaceous earth. The three enter the same rolling oil diatomaceous earth storage tank of the rolling mill (a small tank is used for transition) through a pipeline, and then are mixed and sent to the rolling mill filter for use; this usage method can share the rolling oil diatomaceous earth pipeline, or additional rolling oil kaolin pipelines and rolling oil cellulose pipelines can be laid. Regardless of the method, a compressed air purge interface should generally be set synchronously at the output end of the three centralized diatomaceous earth storage tanks to improve the purge effect after each transmission of the pipeline is completed.

[0079] Preferably, Figure 2As shown, the rolling mill unit includes a first rolling mill diatomite oil storage tank 2.5 and a second rolling mill diatomite oil storage tank 2.6, each connected to the filter of the rolling mill unit via valves and pipelines. A slurry transfer pump is provided at the outlet of each centralized diatomite oil storage tank, and is connected to different rolling mill diatomite oil storage tanks via valves and rolling oil diatomite pipelines 3.4. A compressed air purge interface is provided on the rolling oil diatomite pipeline for purging residual rolling oil diatomite in the rolling oil diatomite pipeline. The rolling mill unit also includes a first rolling mill additive tank 2.7 and a second rolling mill additive tank 2.8. The output ends of these rolling mill additive tanks are connected to the clean oil tank and / or dirty oil tank of the rolling mill unit via valves and pipelines (the connection between the additive pipeline and the dirty oil tank is not shown in the figure). A metering pump is provided at the outlet of each centralized additive tank, and is connected to different rolling mill additive tanks via valves and additive pipelines 4.4. A compressed air purge interface is provided on the additive pipeline for purging residual additive in the additive pipeline.

[0080] Since the use requirements of diatomaceous earth (filter aid) may be relatively complex and may be different during the normal rolling stage of the rolling mill and the filter paper replacement stage, the above methods of using centralized diatomaceous earth oil storage tanks and rolling mill diatomaceous earth oil storage tanks are mainly for the normal rolling stage. The mixing ratio of rolling oil and diatomaceous earth is implemented according to engineering experience. If only the spraying during the normal rolling cycle is considered, the ratio of rolling oil to filter aid (pure diatomaceous earth, kaolin, cellulose mixture) is generally 22:1. The rolling oil selects the corresponding base oil, blending oil or recovered oil / regenerated oil according to the function of the rolling mill; for pre-coating after the filter paper is replaced, generally pre-coat a 10:1 rolling oil to pure diatomaceous earth mixture first, and then spray an 80:1 rolling oil to kaolin plus cellulose mixture until the filter pressure meets the standard and enters the normal rolling cycle. At this time, the functional allocation of centralized diatomaceous earth storage tanks and rolling mill diatomaceous earth storage tanks needs to adapt to the new spraying requirements. For example, three rolling mill diatomaceous earth storage tanks can be designed to pre-store a 10:1 rolling oil to pure diatomaceous earth mixture, an 80:1 rolling oil to bleaching clay and cellulose mixture, and a 22:1 rolling oil to filter aid (pure diatomaceous earth, bleaching clay, cellulose) mixture. The three centralized diatomaceous earth storage tanks can be set up according to the corresponding functions above, or two of them can still be designed as rolling oil diatomaceous earth (filter aid) storage tanks for normal circulation corresponding to the roughing and medium rolling mills and the finishing mill, and the other can be switched for use; alternatively, the three centralized diatomaceous earth storage tanks can remain unchanged according to the original design, and the 10:1 rolling oil to pure diatomaceous earth mixture and the 80:1 rolling oil to bleaching clay and cellulose mixture can be directly stirred in the rolling mill diatomaceous earth storage tank. The specific design will be based on the convenience of the site.

[0081] The traditional separate management of rolling oil for each rolling mill is mainly based on the complexity of centralized management pipelines and the different needs of each rolling mill. Centralized management lacks effective system design and management methods. Although manual management is labor-intensive and has low accuracy, it still has certain controllability and reliability.

[0082] Example 1 of the present invention provides the necessary hardware foundation for refined management through the rational design of oil tanks / cans and pipeline connections, as well as the division and connection design of each unit. This example also installs different valves and compressed air purge ports on the shared pipeline and the independent pipelines of different rolling mills. Different rolling mill units are equipped with small rolling oil tanks for buffering, rolling oil diatomaceous earth storage tanks, and additive tanks. Therefore, in general, on the one hand, the buffer oil tank / tank of a single rolling mill unit can easily realize the refined management of the unit. This design is not inconsistent with the refined management of the centrally designed diatomaceous earth unit, additive unit, and blending oil / base oil unit. It is just that in engineering practice, the accuracy of the latter's refined management is inferior to the former; on the other hand, the compressed air purge interface is designed between the pipelines of each centralized unit and the rolling mill unit to meet the problem of the mutual influence of the residues in the shared pipeline when the diatomaceous earth, additives, and blending oil / base oil components required by different rolling mill units are inconsistent. At the same time, the pipeline can be maintained regularly, which further enhances the practicality of the system; on the other hand, through reasonable valve design, the shared pipeline can transmit fluids of different components to meet the needs of different units. The maximization method in the specific design is to design a valve for each branch pipeline, which will inevitably realize the independent interconnection of each pipeline on demand. Another miniaturized design method is to design a valve according to the independent pipeline transmission requirements of the entire system. When each independent pipeline is transmitting, the other branch pipes should be closed. One valve can realize the function of a multi-directional switch.

[0083] This embodiment has a relatively comprehensive design. The additive unit is equipped with a quantitative addition device located in the auxiliary span near the finishing mill in the workshop. The additive quantitative addition device uses a dedicated constant temperature box to heat the oil drum containing additives, and includes a quantitative pump and / or a weighing device. Additive delivery process: In this system, additives for the finishing (finished product) mill are added to each mill from the west side of the plant, starting with the nearest and then the farthest. A pneumatic ball valve is installed at the inlet of each mill series (roughing, medium, and finishing mill series), and a compressed air purge point is designed. After the additive cylinder at the end of the finished mill in the series is full, the pipeline is purged to prevent clogging. Additives for the roughing and medium mills are added to each mill from the east side of the plant, starting with the nearest and then the farthest. A pneumatic ball valve is installed at the inlet of each mill series, and a compressed air purge point is designed. After the additive cylinder at the end of the roughing and medium mill in the series is full, the pipeline is purged to prevent clogging. Due to process requirements, the medium and finishing mills may be used as either finishing mills or roughing and medium mills. Therefore, the shared additive pipeline is designed as a ring network, and a switching valve is installed through the main pipeline of the medium mill.

[0084] The transportation process of the mixed diatomaceous earth rolling oil is as follows: the mixed rolling oil diatomaceous earth for the finished rolling mill is added to each rolling mill from the pipeline on the west side of the plant. Generally, it is first injected into the rolling mill diatomaceous earth storage tank (small tank), starting with the nearest and then the farthest. A pneumatic ball valve is installed at the inlet of each rolling mill, and a compressed air purge point is designed. After the rolling oil diatomaceous earth tank of the finished rolling mill is full, the pipeline is purged to prevent clogging. The roughing and medium rolling mills are added to each rolling mill from the pipeline on the east side of the plant, starting with the nearest and then the farthest. A pneumatic ball valve is installed at the inlet of each rolling mill, and a compressed air purge point is designed. After the additive tank of the roughing and medium rolling mill is full, the pipeline is purged to prevent clogging. Due to process requirements, the medium and fine rolling mills may be used as either a finished product rolling mill or a roughing and medium rolling mill. Therefore, the shared rolling oil diatomaceous earth pipeline is designed in the form of a ring network, and a switching valve is added through the main pipeline of the medium rolling mill.

[0085] The rolling mill unit and the blending oil / base oil unit are further provided with a detection pipeline or a sampling device, and an oil quality detection device is synchronously provided. The oil quality detection device is electrically connected to the control unit.

[0086] In this embodiment, the spare oil tank of each centralized unit on site is designed and manufactured according to 30 cubic meters of base oil, 15 cubic meters of finished rolling mill blending oil, and 15 cubic meters of coarse and medium rolling mill blending oil (including different oil mixtures of diatomaceous earth unit and additive unit); each set of full oil recovery and regeneration system has a 20 cubic meter dirty oil tank, a 10 cubic meter full oil recovery tank, a 20 cubic meter regeneration tank, and a 10 cubic meter waste oil tank; the full capacity of each rolling mill tank is 2.5 cubic meters, and the actual oil replenishment volume each time accounts for approximately 70-80% of the total volume, about 1.8 cubic meters.

[0087] According to the above design, through a dedicated secondary management platform for rolling oil (the primary level is the entire workshop system management platform), the entire plant can achieve stable rolling oil composition for each mill in the plant based on laboratory analysis and rolling process requirements, with initial manual participation, to maximize the satisfaction of rolling process conditions, improve yield, and reduce costs. The ultimate goal is to minimize manual participation in rolling oil management after the product and process are finalized, allowing for more precise management of rolling oil. The features of the modified system include:

[0088] ① The plant consists of three workshops, each of which is divided into Area 3A and Area 3B. Incoming base oil, diatomaceous earth, and additives are unloaded and mixed at designated locations in Workshop 3B. Waste oil treated by the regeneration system is loaded and shipped out at designated locations in Workshop 3B.

[0089] ② The additives in the whole plant are centrally kept at a constant temperature and automatically transported to the device for quantitatively injecting additives into each rolling mill, so that the additives can be added to the rolling oil on an hourly basis;

[0090] ③ The diatomaceous earth for rolling oil in the whole plant is centrally mixed and automatically transported to the diatomaceous earth mixing tank of the existing rolling mill, while balancing and stabilizing the liquid level of the oil tank of each series of rolling mills. Example 7

[0091] The difference from Example 1 is that the diatomite unit described in this embodiment includes a first centralized diatomite oil storage tank 3.1 and a second centralized diatomite oil storage tank 3.2, which store diatomite stirred with base oil or blending oil (referred to as rolling oil diatomite or rolling oil diatomite mixture in the present invention), corresponding to the rolling oil diatomite oil storage tank of the finished rolling mill (finishing rolling mill) and the rolling oil diatomite oil storage tank of the roughing and medium rolling mill, respectively; the rolling mill unit includes a first rolling mill diatomite oil storage tank 2.5, which is connected to the filter of the rolling mill unit via a valve and a pipeline; a slurry delivery pump is respectively provided at the outlet of the first centralized diatomite oil storage tank and the second centralized diatomite oil storage tank, and is respectively connected to different rolling mill diatomite oil storage tanks via a valve and a rolling oil diatomite pipeline, for controlling the delivery of stirred diatomite that meets the variety requirements to different rolling mill units as needed. Diatomaceous earth; generally, according to the function of the rolling mill, it is determined whether the diatomaceous earth oil storage tank of the rolling mill is a finished rolling mill rolling oil diatomaceous earth oil storage tank or a rough and medium rolling mill rolling oil diatomaceous earth oil storage tank, and at the same time, a fixed connection relationship with the centralized diatomaceous earth oil storage tank is determined. This embodiment adopts another connection method. Different diatomaceous earth oil storage tanks are completely interconnected through the main pipeline rolling oil diatomaceous earth pipeline, and real-time communication between different diatomaceous earth oil storage tanks is achieved through valve switches, that is, the corresponding rolling oil diatomaceous earth transportation is completed according to the functional requirements of the rolling mill. For example, when the rolling mill is set to a finishing mill, the connection between the rolling mill diatomaceous earth oil storage tank and the first centralized diatomaceous earth oil storage tank is opened through valve control, and its connection with the second centralized diatomaceous earth oil storage tank is closed, and vice versa; a compressed air purge interface is provided on the rolling oil diatomaceous earth pipeline for purging residual rolling oil diatomaceous earth in the rolling oil diatomaceous earth pipeline. Example 8

[0092] The difference from Example 7 is that the rolling mill unit described in this embodiment further includes a second rolling mill diatomaceous earth oil storage tank 2.6, which is connected to the filter of the rolling mill unit via a valve and a pipeline, and is connected to the first centralized diatomaceous earth oil storage tank and / or the second centralized diatomaceous earth oil storage tank via a rolling oil diatomaceous earth pipeline and a valve; generally, the first rolling mill diatomaceous earth oil storage tank and the second rolling mill diatomaceous earth oil storage tank are connected to the first centralized diatomaceous earth oil storage tank and the second centralized diatomaceous earth oil storage tank of the diatomaceous earth unit, respectively. Corresponding to the demand for diatomaceous earth usage of rolling oil of finished rolling mill and rough and medium rolling mill respectively; two rolling mill diatomaceous earth storage tanks can also store the same rolling oil diatomaceous earth; in this embodiment, the two rolling mill diatomaceous earth storage tanks are respectively set as the finished rolling mill rolling oil diatomaceous earth storage tank and the rough and medium rolling mill rolling oil diatomaceous earth storage tank, which are connected to the first centralized diatomaceous earth storage tank and the second centralized diatomaceous earth storage tank respectively through the rolling oil diatomaceous earth pipeline, and the real-time connection is achieved by switching the valve switch, which is the same as the connection method of the first rolling mill diatomaceous earth storage tank.

[0093] Preferably, the diatomaceous earth unit includes a third centralized diatomaceous earth oil storage tank 3.3, which is a backup centralized diatomaceous earth oil storage tank. A slurry delivery pump is provided at the outlet, and then the output pipelines (rolling oil diatomaceous earth pipelines) of the first centralized diatomaceous earth oil storage tank and the second centralized diatomaceous earth oil storage tank are respectively connected through two sets of valves and pipelines to achieve the storage and delivery requirements of different rolling oil diatomaceous earth required for rough, medium and finishing rolling (that is, the functions of the oil storage tanks can be switched); in this setting, the first centralized diatomaceous earth oil storage tank 3.1 is the rolling oil diatomaceous earth oil storage tank for the finished rolling mill (finishing rolling mill), the second centralized diatomaceous earth oil storage tank 3.2 is the rolling oil diatomaceous earth oil storage tank for the rough and medium rolling mills, and the third centralized diatomaceous earth oil storage tank 3.3 is a backup of the two oil storage tanks and can be switched to any one of them. Example 9

[0094] The difference from Example 1 is that Figure 5 As shown, the additive unit of this embodiment includes a first centralized additive tank 4.1 and a second centralized additive tank 4.2, which respectively centrally store additives for the finished rolling mill (finishing rolling mill) and the roughing and medium rolling mill, and are generally provided with corresponding auxiliary devices such as heating devices at the same time, which is a conventional technology; the rolling mill unit includes a first rolling mill additive tank 2.7, the output end of which is output through a metering pump, and is connected to the clean oil tank and / or dirty oil tank of the rolling mill unit through valves and pipelines, so as to achieve the appropriate addition of the rolling mill additive, thereby improving the phenomenon that the oil quality is easily changed by manual addition of one barrel / one bag or multiple barrels / multiple bags at a time based on experience in the past, thereby affecting the rolling quality of aluminum plates, strips and foils; metering pumps are respectively provided at the outlets of the first centralized additive tank and the second centralized additive tank, and then connected to the clean oil tank and / or dirty oil tank of the rolling mill unit through valves and pipelines. Different rolling mill additive tanks are connected to control the delivery of processed additives to different rolling mill units as needed; generally, whether the rolling mill additive tank is a finished product rolling mill additive tank or a rough and medium rolling mill additive tank is determined according to the function of the rolling mill, and the fixed connection relationship with the centralized additive tank is determined at the same time. This embodiment adopts another connection method. Different additive tanks are completely interconnected through the main pipeline additive pipeline, and real-time communication between different additive tanks is achieved through valve switches, that is, the corresponding additive delivery is completed according to the functional requirements of the rolling mill. For example, when the rolling mill is set to a finishing mill, the connection between the rolling mill additive tank and the first centralized additive tank is opened through valve control, and its connection with the second centralized additive tank is closed, and vice versa; a compressed air purge interface is provided on the additive pipeline to purge residual additives in the additive pipeline.

[0095] Preferably, the rolling mill unit also includes a second rolling mill additive tank 2.8, which is connected to the first centralized additive tank and / or the second centralized additive tank through an additive pipeline and a valve. The output end of the second rolling mill additive tank is output through a metering pump and is connected to the clean oil tank and / or dirty oil tank of the rolling mill unit through valves and pipelines; generally, the first rolling mill additive tank and the second rolling mill additive tank are respectively connected to the first centralized additive tank and the second centralized additive tank of the additive unit, corresponding to the additive usage requirements of the finished rolling mill and the rough and medium rolling mill respectively; the two rolling mill additive tanks can also store the same additives; in this embodiment, the two rolling mill additive tanks are respectively set as the finished rolling mill additive tank and the rough and medium rolling mill additive tank, which are respectively connected to the first centralized additive tank and the second centralized additive tank through the additive pipeline, and the real-time connection is achieved by switching the valve switch, which is the same as the connection method of the first rolling mill additive tank.

[0096] Preferably, the additive unit includes a third centralized additive tank 4.3, which is a spare centralized additive tank. A metering pump is provided at the outlet, and then the output pipelines of the first centralized additive tank and the second centralized additive tank are respectively connected through two sets of valves and pipelines to realize the storage and transportation requirements of different additives required for roughing, medium and finishing rolling (that is, the functions of the additive tanks can be switched); the first centralized additive tank 4.1 is the additive tank for the finished rolling mill (finishing rolling mill), the second centralized additive tank 4.2 is the additive tank for the roughing and medium rolling mill, and the third centralized additive tank 4.3 is a backup for the two additive tanks, which can be switched to any one of them; considering that pure additives are not easy to be transported in pipelines, additives are generally dissolved in base oil or blending oil first. Therefore, the centralized additive tank is also provided with an inlet for blending oil / base oil and / or recovered oil / regenerated oil. For additives for the finishing mill, only base oil is generally used for pre-dissolution. A heating device can be provided on the centralized additive tank or the rolling mill additive tank and the additive transmission pipeline as appropriate. These are all conventional technologies.

[0097] above Figures 1 to 8 Examples of sensor symbols such as valves and level gauges are as follows Figure 9 shown.

[0098] For the above Examples 1-9, although the oil product testing focuses on the additive content, when some oil product testing data (such as kinematic viscosity, distillation range, moisture, flash point, etc.) seriously exceed the standard, the base oil and / or mixed base oil additives can generally be directly supplemented. At the same time, it is also necessary to control the transfer of the waste oil in the corresponding rolling mill waste oil tank to the distillation waste oil tank 8.2 of the distillation regeneration unit 8 to improve the indicators of the recycling use of the rolling oil. Under the premise that the tank liquid level and the additive content do not exceed the upper limit, direct one-time supplementation or continuous small-amount supplementation can be carried out to maintain the stability of the oil product and prevent the tank liquid level from exceeding the upper limit.

[0099] The following table shows the oil control indicators for the finishing mill and the roughing and medium rolling mill when rolling battery aluminum foil:

[0100] Table 1: Oil quality control indicators for finishing mill and roughing and intermediate mill during battery aluminum foil rolling

[0101]

[0102] With respect to all the above embodiments, the present invention further provides a variety of methods for refined management of aluminum sheet and foil rolling oil, including an additive replenishment method, a diatomaceous earth replenishment method, a rolling oil replenishment method, and a blending oil blending method. The execution process of each method can be relatively independent, generally operating on a single rolling mill or rolling mill unit, without distinguishing the order of priority, and each method determines whether its own execution conditions are met and executes according to the established process. The rolling oil includes any of base oil, blending oil, recovered oil, and regenerated oil.

[0103] According to the requirements of additives and diatomaceous earth for the corresponding rolling mill series, the rolling oil is mixed in advance according to the required proportion, and can be transferred to the oil storage tanks of different rolling mill series in different tanks and at different times.

[0104] The control unit controls the valves and pumps to inject raw materials into the corresponding centralized diatomaceous earth storage tanks and centralized additive tanks according to the predetermined mixing ratio of rolling oil diatomaceous earth and rolling oil additives. The additives and diatomaceous earth are generally added by weighing in fixed quantities (such as a fixed quota of one barrel / one bag or multiple barrels / multiple bags), and rolling oil is added through pipelines according to the predetermined ratio; the control unit will also control the diatomaceous earth storage tanks, rolling mill additive tanks, and rolling mill base oil / blending oil tanks of each rolling mill unit to replenish the corresponding raw materials to the dirty oil tank, filter or clean oil tank of the rolling mill unit according to the corresponding flow rate and time according to the actual test results of the rolling oil of each rolling mill unit.

[0105] The additive replenishment method includes a timed and quantitative additive replenishment method and / or a timely additive replenishment method. The timed and quantitative additive replenishment method includes automatically replenishing the corresponding additive or rolling oil additive mixture to the rolling mill net oil tank based on the statistical results of the average daily additive consumption weight of the rolling mill before the rolling oil additive content in the rolling mill net oil tank reaches a first additive threshold value (minimum content); if the additive is directly replenished, the corresponding amount of additive is added according to the average daily consumption. This management method focuses on replenishing the rolling oil additive mixture, which is more convenient for automatic measurement and control. The average daily additive consumption is a kg, and the additive content in the rolling oil additive mixture is x (weight / mass percentage). Then the total amount of the rolling oil additive mixture replenished at one time is a / x, where (a / x)-a is the synchronous replenishment amount of rolling oil, which should be taken into account when calculating the rolling oil replenishment amount.

[0106] The diatomaceous earth replenishment method includes a diatomaceous earth quantitative replenishment method on demand, which includes determining whether a paper replacement operation is required based on the filter's own osmotic pressure test result. Usually, when the filtration pressure exceeds 3.8 bar, it is defaulted that the filter needs to be cleaned and the paper replacement operation is performed. After the filter paper is replaced, the corresponding centralized diatomaceous earth oil storage tank or the rolling mill diatomaceous earth oil storage tank is connected according to the rolling oil demand of the rolling mill, and the rolling oil diatomaceous earth mixture is quantitatively sprayed onto the new filter paper according to the established strategy. For example, pulse spraying is adopted, and the spraying is continuous for 10-20 seconds every 3 minutes, and the spraying cycle is 10 times. Different rolling mills have different rolling oil diatomaceous earth, and the spraying strategy can be different. The stirred diatomaceous earth acts as a filter aid to play a filtering role. The larger the spraying flow rate, the better the filtering effect. However, the filter cake layer thickness increases at a higher rate, the filtration cycle becomes shorter, the pressure rises faster, and the filter medium is not fully utilized, which easily leads to material waste. At the same time, the filter cake is difficult to replace when it is too thick. On the other hand, if the spraying flow rate is small, the filtration cycle is extended, the adsorption and filtration capacity of the filter cake is insufficient, and the oil quality index cannot be guaranteed. Therefore, the optimal flow control should take into account both the filtration time and the filtration effect. The mixing ratio of diatomaceous earth in rolling oil is determined according to the different rolling mill functions and rolling oil requirements;

[0107] The rolling oil replenishment method includes a rolling oil timing and quantitative replenishment method, which includes automatically replenishing the corresponding rolling oil to the rolling mill clean oil tank or the rolling mill dirty oil tank (after filtration and then entering the rolling mill clean oil tank) based on the average daily consumption of rolling oil types and weight statistics of the rolling mill before the liquid level of the rolling mill clean oil tank reaches the first liquid level threshold (minimum liquid level), and stopping replenishment when the liquid level reaches the second liquid level threshold of the rolling mill clean oil tank; the second liquid level threshold of the rolling mill clean oil tank is the liquid level threshold for replenishing rolling oil alone or continuously replenishing additives. The conservative threshold is less than the third liquid level threshold of the rolling mill net oil tank, that is, the maximum liquid level threshold, leaving a margin to adapt to the uncertainty of synchronous replenishment of rolling oil when replenishing additives or diatomaceous earth. Even if the quantitative replenishment has not reached the amount, the current replenishment has been completed, that is, the quantitative replenishment is completed even if the maximum liquid level has not been reached; if the scheduled replenishment time has not arrived, but the liquid level has reached the minimum liquid level threshold, the quantitative replenishment of rolling oil will be automatically started; if it is known that rolling oil replenishment exists synchronously with the replenishment of additives and diatomaceous earth, the amount of rolling oil replenished separately should be considered to deduct the synchronous replenishment amount;

[0108] The blending method for blending oil includes a fixed-ratio blending method, which involves blending recycled oil, regenerated oil, and base oil in fixed ratios to produce blending oil for roughing and intermediate mills. Recycled and regenerated oils are generally tested for additive content before use, and the blending ratio during use follows the rules of solute and solvent mixing (no chemical reactions). This management method, in accordance with current Gundam (a unit of surface tension) machine requirements, does not limit the amount of recycled, regenerated, or base oil used in roughing mills. For cost reasons, recycled and regenerated oil are primarily used in roughing mill blending oil, with base oil supplemented when the total amount is insufficient. Generally, the combined proportion of recycled and regenerated oil in intermediate mill blending oil does not exceed 20%, with regenerated oil being the primary oil. When regenerated oil is insufficient, recycled oil is used, provided the ratio requirement is met, with the remainder being made entirely of base oil. Only base oil is supplemented in finishing mills. Blending oil is generally performed by activating interconnecting pipes at the input and output ends of the blending tank to circulate the oil within the tank to ensure uniform mixing.

[0109] This management method is based on the previous day's consumption of base oil / blending oil and additives of each rolling mill. Every day, each rolling mill replenishes the base oil / blending oil and additives from its rolling mill additive tank and rolling mill blending oil / base oil tank as planned; according to the need for filter paper replacement, diatomaceous earth and other filter aids are replenished from the diatomaceous earth storage tank of each rolling mill in a timely manner to the filter; the blending oil / base oil unit, centralized diatomaceous earth unit and centralized additive unit take turns to inspect the oil quantity and oil quality of the small oil tanks / tanks of all the rolling mill units in use every day, and when the oil tank / tank level reaches or falls below the minimum level threshold, the corresponding raw materials are replenished to the corresponding maximum level; or when the oil level in the dirty oil tank is less than 60% of its capacity after the daily inspection, rolling oil and / or rolling oil additive mixture are directly replenished to keep the dirty oil tank level at 60% and ensure the stability of the additive content.

[0110] The timely stage-by-stage additive replenishment method and the timely continuous additive replenishment method are essentially a combined replenishment method of additives, diatomaceous earth, and rolling oil; since rolling oil management is generally dominated by the replenishment of additives, the consumption of diatomaceous earth and rolling oil is comprehensively considered and coordinated and fine management is carried out. Therefore, the modifier "additive-based" is used in the naming.

[0111] Preferably, this management method, the timely staged replenishment of additives, primarily focuses on replenishing the rolling oil additive mixture, facilitating automated metering and control. While this method is called the timely staged replenishment of additives, it essentially integrates the replenishment of diatomaceous earth, additives, and rolling oil, leading to its also-called refined management method for aluminum sheet, strip, and foil rolling oil at the timely stage.

[0112] The timely additive replenishment method includes limiting the additive content in the rolling oil net oil tank to a smaller range x0±e, and starting the additive replenishment operation when the measured content is less than or equal to x0-e; stopping replenishment when the measured additive content is greater than or equal to x0+e, or calculating and replenishing the staged replenishment amount according to the final additive content being equal to x0+e, without the need for real-time detection, or replenishing according to the average consumption rate of the additive; the timely additive stage replenishment method is characterized in that the daily or multi-day replenishment in barrels / bags is replaced by staged appropriate replenishment based on experience, shortening the replenishment interval (generally not exceeding 24 hours), and reducing the fluctuation range of the rolling oil additive content in the rolling mill net oil tank; wherein the standard value of the rolling mill rolling oil additive content is x0, and the allowable fluctuation range is ±e, both of which are weight / mass percentages. The smaller the range of e, the smaller the oil product fluctuation, which is smaller than the fluctuation range of the additive content in the traditional process, that is, exceeding the range of e does not mean that the system cannot work, but further changes may affect product quality. Therefore, the system also defines a safe upper limit x of the additive content. u and the lower limit x d When the lower limit is reached, additives must be replenished immediately, and the total amount replenished shall not exceed the upper limit.

[0113] During traditional manual replenishment, the content of rolling oil additives in the finishing mill generally fluctuates within the range of 9%±1%. In this management method, x0 and e are taken as 9% and 0.2% respectively; the content of rolling oil additives in the roughing mill generally fluctuates within the range of 10%±1.5%. In this embodiment, x0 and e are taken as 10% and 0.3% respectively, and the fluctuation range is significantly reduced.

[0114] According to the mixing ratio of the new rolling oil additive to be added, the additive content of the mixture is recorded as x1>x0+e (known amount), and the total weight to be added is h1 (unknown amount); the current measured additive content in the net oil tank is x2 (known amount), and the total weight converted from the measured liquid level of the liquid level gauge is h2 (known amount). Generally, x0-e≤x2≤x0+e. The additive addition operation is started when the measured additive content reaches the lower limit x0-e; the additive content in the planned blending oil is x3 (known amount), and the total weight to be added is h3 (unknown amount, including the amount of blending oil introduced due to diatomaceous earth addition during the same period. If the finishing mill only stirs the base oil, then h3=0; if the blending oil does not contain additives, then x3=0); the total weight of the planned base oil to be added is h4 (unknown amount), excluding additives; the total amount of rolling oil mixture corresponding to the second liquid level threshold of the rolling mill net oil tank is h5 (known amount, which can be converted or measured), and the corresponding additive content is x0+e; then, according to the two equilibrium equations for additives and rolling oil:

[0115] h1*x1 + h2*x2 + h3*x3 = h5*(x0+e) Formula (1)

[0116] h1*(1-x1)+h2*(1-x2) + h3*(1-x3) + h4 = h5*(1-x0-e) Formula (2)

[0117] On the surface, the above equations need to solve the three unknowns h1, h3, and h4. However, under the premise of not affecting the quality of the finished product and considering reducing costs, there are established rules for the use of rolling oil in roughing, medium and finishing mills: recycled oil and regenerated oil are used in roughing, and there is no limit on the amount of base oil. Considering cost factors, the roughing blending oil mainly uses recycled oil and regenerated oil; the cumulative proportion of recycled oil and regenerated oil in the medium rolling blending oil does not exceed 20%, and the remainder is all base oil; only base oil is added in finishing.

[0118] Therefore, for different rolling mills, h4 and h3 have a certain proportional relationship. According to this proportional relationship, formula (1) and formula (2) are jointly solved to form a system of equations to obtain h1, h3, and h4.

[0119] For example, for the roughing mill, when the total amount of existing blending oil meets the requirements, it is considered that h4=0. Formula (1) and formula (2) form a system of equations. The two equations and two unknowns can be solved for h1 and h3. If the solved h3 exceeds the total amount of existing blending oil, the insufficient amount of the blending oil after deducting the additive content is supplemented with base oil, that is, h4 is known, and then the unknowns h1 and h3 are solved again. Among them, h3 is the total weight of the rolling oil in the mixture of the rolling oil supplemented separately and the diatomaceous earth rolling oil. Since the diatomaceous earth supplementation amount and supplementation plan are basically determined, that is, the timing and total amount of rolling oil supplemented with diatomaceous earth are known, the total amount of rolling oil supplemented separately can also be obtained.

[0120] For the intermediate rolling mill, we can substitute h4=4 h3 into the equations to solve h1 and h3, and get the base oil consumption h4 at the same time;

[0121] For the finishing mill, simply set h3=0 and solve the equations to obtain h1 and h4.

[0122] In this way, the corresponding rolling oil additive mixture, rolling oil diatomaceous earth mixture, and rolling oil can be supplemented according to the calculation results.

[0123] In engineering applications, the three may not be added at the same time. For example, if there is only a need for diatomaceous earth supplementation, when it is confirmed through calculation that the amount of diatomaceous earth added to the rolling oil does not exceed the limit of the overall index of the system, only the rolling oil diatomaceous earth can be added, and the joint supplementation can be started when the actual content of the additive in the clean oil tank of the rolling mill is lower than the index; if the calculated rolling oil diatomaceous earth will dilute the additive in the clean oil tank of the rolling mill, making its content lower than the index, the additive needs to be supplemented simultaneously, and the supplementation amount is still calculated by solving the simultaneous equations of formula (1) and formula (2);

[0124] If there is a demand for rolling oil replenishment first, it is necessary to consider that the additives will be diluted when replenishing the rolling oil. Therefore, the demand for additive replenishment needs to be calculated simultaneously. The replenishment amount is still calculated by solving the simultaneous equations of formula (1) and formula (2).

[0125] In other words, regardless of which material becomes deficient first, the system of the present invention considers them all together, calculating the replenishment amount by starting to solve the simultaneous equations of Formula (1) and Formula (2), and then controlling replenishment according to the calculated amount. This is a refined management approach using a unified approach to solving the equations. Because it measures in real time and replenishes in a timely manner, each type of fluid is controlled at a medium flow rate during replenishment, and each replenishment takes a certain amount of time, it is called the additive timely stage replenishment method.

[0126] When oil test data (such as kinematic viscosity, residue, alcohol or fat, etc.) exceeds the standard, base oil and / or base oil blend additives can generally be directly added. At the same time, it is necessary to control the discharge of waste oil from the corresponding rolling mill waste oil tank to the distillation waste oil tank of the distillation regeneration unit to improve the indicators of rolling oil recycling. When the waste oil in the distillation regeneration unit mainly comes from the finishing mill, this waste oil can be directly transferred to the roughing and medium rolling mill waste oil tank for use in the roughing and medium rolling mill rolling oil recycling; or, through pipeline connection and valve control, the finishing mill waste oil can be directly transferred to the roughing and medium rolling mill waste oil tank for use in the roughing and medium rolling mill rolling oil recycling. This connection is not shown in the diagram.

[0127] The basic principle of the present invention is: a refined management system for aluminum plate, strip and foil rolling oil designed by the present invention targets the key point of rolling oil management: balancing the demand for relatively stable oil quality and liquid level in the oil tank of each rolling mill, and providing a system that can realize centralized and refined management of rolling oil. The entire workshop or factory area is equipped with diatomaceous earth, additives, and rolling oil for centralized processing (mixing, stirring and / or heating) and storage. The control unit transmits the oil to each demand unit through special valves, special pumps, and pipelines according to the needs of each rolling mill unit and the oil product test results. This design greatly saves the workload and human resources for processing and replenishing rolling oil, diatomaceous earth, and additives for each rolling mill, and can solve the problem of large oil product fluctuations and impact on product quality caused by traditional rolling oil composition adjustment every ten days or even half a month, adjustment based on experience, etc. It can realize daily precise adjustment or real-time dynamic adjustment of oil products, maintain the optimal production state of the rolling mill, further improve product quality, and increase the yield rate.

[0128] The above are only some embodiments of a refined management system for aluminum sheet and foil rolling oil of the present invention. In fact, pipelines, valves, special pumps and oil tanks / storage tanks can be arranged according to the actual situation of the factory area and workshop. For example, the retention combination of each unit, the number of oil tanks / storage tanks varies according to the site, etc. There are many preferred combination embodiments, and these combinations should also be regarded as the scope of protection of the present invention, and they will not be listed here one by one.

Claims

1. A refined management system for rolling oil of aluminum plates, strips and foils, comprising a rolling mill unit (2), wherein rolling oil is circulated, filtered and used between a rolling mill (1) of the rolling mill unit and an oil tank inside the unit, wherein the rolling mill unit comprises a rolling mill clean oil tank (2.1), a rolling mill dirty oil tank (2.2) and a filter (2.3), wherein clean oil in the rolling mill clean oil tank flows to the rolling mill through a pipeline, and after rolling the aluminum plates, strips and foils, dirty oil enters the rolling mill dirty oil tank through a pipeline, and then enters the filter through a pipeline, and the dirty oil is filtered by the filter to form clean oil, which enters the rolling mill clean oil tank through a pipeline; wherein the clean oil is filtered by the filter and then enters the rolling mill clean oil tank through a pipeline; Each rolling mill (1) is provided with a rolling mill unit or a plurality of adjacent rolling mills are provided with one rolling mill unit, and two or more rolling mill units are centrally provided with a diatomaceous earth unit (3), an additive unit (4), a blending oil / base oil unit (5) and a control unit (6), respectively, wherein the diatomaceous earth unit, the additive unit and the blending oil / base oil unit are connected to each rolling mill unit via a pipeline; The diatomite unit is centralized to complete the diatomite mixing, and at least one mixing tank is set up, which is connected to all the rolling mill units through pipelines. The control unit transports the mixed rolling oil diatomite to the rolling mill units through control valves and special pumps; The additive unit processes additives centrally, is equipped with at least one mixing tank, is connected to all rolling mill units through pipelines, and the control unit delivers the processed additives to the rolling mill units through control valves and dedicated pumps; The blending oil / base oil unit comprises at least a base oil tank (5.1), which is connected to the rolling mill unit, the diatomaceous earth unit and the additive unit via valves and pipelines; The blending oil / base oil unit (5) further comprises a first blending oil tank (5.2) and a second blending oil tank (5.3); the diatomaceous earth unit comprises a first centralized diatomaceous earth oil storage tank (3.1) and a second centralized diatomaceous earth oil storage tank (3.2); the additive unit comprises a first centralized additive tank (4.1) and a second centralized additive tank (4.2); A dedicated pump and / or valve is provided on the pipeline, and the control unit is electrically connected to the electric control device of the dedicated pump and valve.

2. The refined management system for aluminum sheet and foil rolling oil according to claim 1 is characterized in that: The valves include ball valves, stop valves, meter valves, control valves, and check valves; the ball valves include pneumatic ball valves, manual ball valves, and electromagnetic pneumatic ball valves; the pipelines include at least a recovered oil / regenerated oil pipeline (7.5), a blended oil / base oil pipeline (5.4), a rolling oil diatomaceous earth pipeline (3.4), an additive pipeline (4.4), and a waste oil pipeline (2.4); the dedicated pumps include a metering pump, a slurry delivery pump, and a pressure pump.

3. A refined management system for aluminum sheet and foil rolling oil according to claim 2, characterized in that: The system further comprises a full oil recovery unit (7), which comprises an oil and gas recovery device (7.1), a recovery oil tank (7.2), an air intake pipe (7.3), and a smoke collector (7.4); the smoke collector is installed near the rolling mill, one end of the air intake pipe is connected to the smoke collector, and the other end is connected to the oil and gas recovery device, and the oil and gas recovery device is connected to the recovery oil tank via a pipe; oil and gas volatiles in the rolling mill area are recovered by the full oil recovery unit to form recovered oil stored in the recovery oil tank, and the recovery oil tank is connected to the rolling mill unit and / or the blending oil / base oil unit via a valve and a recovery oil / regenerated oil pipe (7.5).

4. A refined management system for aluminum sheet and foil rolling oil according to claim 2 or 3, characterized in that: The system further comprises a distillation regeneration unit (8), comprising a distillation device (8.1), an input-end distillation waste oil tank (8.2), an output-end waste oil tank (8.3), and a distillation regeneration oil tank (8.4) connected to the distillation device via pipelines; the regeneration oil tank is connected to the rolling mill unit and / or the blending oil / base oil unit via a valve and a recovered oil / regenerated oil pipeline (7.5).

5. A refined management system for aluminum sheet and foil rolling oil according to claim 2 or 3, characterized in that: The blending oil tank input end is connected to the recovery oil tank (7.2), the regeneration oil tank (8.4), and the base oil tank (5.1) respectively via valves and pipelines, and the output end is connected to the rolling mill unit and / or the diatomaceous earth unit and the additive unit via a pump, a valve, and a blending oil / base oil pipeline (5.4); the blending oil tank input end and output end are interconnected via an interconnecting pipeline, and the interconnecting pipeline is provided with a valve and a dedicated pump.

6. A refined management system for aluminum sheet and foil rolling oil according to claim 4, characterized in that: The blending oil tank input end is connected to the recovery oil tank (7.2), the regeneration oil tank (8.4), and the base oil tank (5.1) respectively via valves and pipelines, and the output end is connected to the rolling mill unit and / or the diatomaceous earth unit and the additive unit via a pump, a valve, and a blending oil / base oil pipeline (5.4); the blending oil tank input end and output end are interconnected via an interconnecting pipeline, and the interconnecting pipeline is provided with a valve and a dedicated pump.

7. The refined management system for aluminum sheet and foil rolling oil according to claim 1 is characterized in that: The diatomaceous earth unit further comprises a third centralized diatomaceous earth oil storage tank (3.3), and the additive unit further comprises a third centralized additive tank (4.3).

8. The refined management system for aluminum sheet and foil rolling oil according to claim 7 is characterized in that: The rolling mill unit comprises a first rolling mill diatomite oil storage tank (2.5) and a second rolling mill diatomite oil storage tank (2.6), the rolling mill diatomite oil storage tanks being connected to filters of the respective rolling mill units via valves and pipelines; slurry delivery pumps are respectively provided at the outlets of the centralized diatomite oil storage tanks, and are respectively connected to different rolling mill diatomite oil storage tanks via valves and rolling oil diatomite pipelines (3.4); a compressed air purge interface is provided on the rolling oil diatomite pipeline for purging residual rolling oil diatomite in the rolling oil diatomite pipeline; the rolling mill unit further comprises a first rolling mill additive tank (2.7) and a second rolling mill additive tank (2.8), the output ends of the rolling mill additive tanks being output via dedicated pumps, and being connected to the clean oil tank and / or dirty oil tank of the respective rolling mill units via valves and pipelines; a metering pump is respectively provided at the outlets of the centralized additive tanks, and are respectively connected to different rolling mill additive tanks via valves and additive pipelines (4.4); a compressed air purge interface is provided on the additive pipeline for purging residual additive in the additive pipeline.

9. The refined management system for aluminum sheet and foil rolling oil according to claim 1, characterized in that: The rolling mill unit comprises a first rolling mill diatomite oil storage tank (2.5), which is connected to the filter of the rolling mill unit via a valve and a pipeline; slurry delivery pumps are respectively provided at the outlets of the first centralized diatomite oil storage tank and the second centralized diatomite oil storage tank, and are respectively connected to different rolling mill diatomite oil storage tanks via valves and rolling oil diatomite pipelines; a compressed air purge interface is provided on the rolling oil diatomite pipeline for purging residual rolling oil diatomite in the rolling oil diatomite pipeline.

10. A refined management system for aluminum sheet and foil rolling oil according to claim 9, characterized in that: The rolling mill unit further comprises a second rolling mill diatomaceous earth oil storage tank (2.6), which is connected to the filter of the rolling mill unit via a valve and a pipeline, and is connected to the first centralized diatomaceous earth oil storage tank and / or the second centralized diatomaceous earth oil storage tank via a rolling oil diatomaceous earth pipeline and a valve.

11. A refined management system for aluminum sheet and foil rolling oil according to claim 10 or 9, characterized in that: The diatomite unit includes a third centralized diatomite oil storage tank (3.3), which is a spare centralized diatomite oil storage tank. A slurry delivery pump is provided at the outlet, and then the output pipelines of the first centralized diatomite oil storage tank and the second centralized diatomite oil storage tank are respectively connected through two sets of valves and pipelines; the blending oil / base oil unit also includes a finishing oil storage tank (5.5); the rolling mill unit also includes a plurality of rolling mill base oil / blending oil tanks.

12. The refined management system for aluminum sheet, strip and foil rolling oil according to claim 1, characterized in that: The rolling mill unit comprises a first rolling mill additive tank (2.7), the output end of which is output via a metering pump and connected to the clean oil tank and / or dirty oil tank of the rolling mill unit via valves and pipelines; metering pumps are respectively provided at the outlets of the first centralized additive tank and the second centralized additive tank, and then connected to different rolling mill additive tanks via valves and additive pipelines (4.4); a compressed air purge interface is provided on the additive pipeline for purging residual additives in the additive pipeline.

13. A refined management system for aluminum sheet, strip and foil rolling oil according to claim 12, characterized in that: The rolling mill unit also includes a second rolling mill additive tank (2.8), which is connected to the first centralized additive tank and / or the second centralized additive tank through an additive pipeline and a valve. The output end of the second rolling mill additive tank is output through a metering pump and is connected to the clean oil tank and / or dirty oil tank of the rolling mill unit through a valve and a pipeline.

14. A refined management system for aluminum sheet, strip and foil rolling oil according to claim 13 or 12, characterized in that: The additive unit comprises a third centralized additive tank (4.3), which is a spare centralized additive tank. A metering pump is provided at the outlet, and then the output pipes of the first centralized additive tank and the second centralized additive tank are respectively connected through two sets of valves and pipes.

15. A refined management system for aluminum sheet, strip and foil rolling oil according to any one of claims 1, 2, 3, 6, 7, 8, 9, 10, 12 and 13, characterized in that: The control unit also includes several sensors including a liquid level meter, a thermometer, a pressure meter, and a flow meter; the control unit is electrically connected to the oil quality detection equipment to obtain oil quality detection result information.

16. The refined management system for aluminum sheet, strip and foil rolling oil according to claim 4, characterized in that: The control unit further includes at least one sensor selected from the group consisting of a liquid level meter, a thermometer, a pressure meter, and a flow meter; and the control unit is electrically connected to the oil quality detection equipment to obtain oil quality detection result information.

17. The refined management system for aluminum sheet, strip and foil rolling oil according to claim 5, characterized in that: The control unit further includes at least one sensor selected from the group consisting of a liquid level meter, a thermometer, a pressure meter, and a flow meter; and the control unit is electrically connected to the oil quality detection equipment to obtain oil quality detection result information.

18. The refined management system for aluminum sheet, strip and foil rolling oil according to claim 11, characterized in that: The control unit further includes at least one sensor selected from the group consisting of a liquid level meter, a thermometer, a pressure meter, and a flow meter; and the control unit is electrically connected to the oil quality detection equipment to obtain oil quality detection result information.

19. The refined management system for aluminum sheet, strip and foil rolling oil according to claim 14, characterized in that: The control unit further includes at least one sensor selected from the group consisting of a liquid level meter, a thermometer, a pressure meter, and a flow meter; and the control unit is electrically connected to the oil quality detection equipment to obtain oil quality detection result information.

Images