Recovery system for aluminium foil rolling oil
By installing a basement and an oil-water separator below the rolling mill, the problems of large footprint and water condensation in the rolling oil circulation filtration device were solved, achieving efficient collection and circulation of rolling oil, reducing energy consumption and extending the service life of the distillation unit.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YICHANG EAST SUNSHINE BATTERY FOIL CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-19
AI Technical Summary
In the existing technology, the rolling oil circulation filtration device occupies a large area, and the basement setting leads to water condensation and water introduction, which affects the service life and energy consumption of the distillation unit.
By setting up a basement below the rolling workshop, an integrated rolling oil circulation filtration device and oil-water separator are installed to achieve the collection and circulation of rolling oil. The oil-water separator separates the water phase, reducing energy consumption and extending the service life of the distillation unit.
It achieves efficient collection and recycling of rolling oil, reduces floor space, lowers energy consumption, and ensures the service life of the distillation unit.
Smart Images
Figure CN224377968U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of aluminum foil production technology, and specifically relates to an aluminum foil rolling oil recovery system. Background Technology
[0002] When the rolling mill cold rolls aluminum foil, the metal is deformed during the instantaneous mechanical energy conversion and releases a large amount of heat. Therefore, it is necessary to spray lubricating oil into the deformation area for lubrication and cooling.
[0003] Rolling oil typically consists of alkanes between C9 and C18 and a small amount of additives. During rolling, most of the rolling oil is filtered and recycled through a rolling oil circulation filtration system. During rolling, various mechanical oils (referred to as heavy oils compared to rolling oil, such as hydraulic oil and gear lubricating oil) inevitably leak into the circulating rolling oil system, increasing the heavy oil content. These heavy oils cannot be removed during the subsequent annealing process of aluminum foil, remaining on the material surface and forming surface defects such as yellow and brown spots, reducing product surface quality. Therefore, the rolling oil in the rolling oil circulation filtration system is discharged for treatment after a certain number of circulations. Additionally, a collection system is installed near the rolling mill to collect the difficult-to-recover and heavily contaminated rolling oil (sludge oil). The sludge oil and the rolling oil discharged from the rolling oil circulation filtration system are collected and sent to a distillation unit for distillation. After distillation, the recovered rolling oil is reused; this not only reduces environmental pollution but also lowers costs.
[0004] For example, patent application number CN202222686829.4 discloses a whole oil recovery and waste oil reuse device. The whole oil recovery and waste oil reuse device includes a crude oil device, a clarification and rolling assembly, a distillation unit, a waste oil tank and a clean oil tank. The outlet of the crude oil device is connected to the inlet of the clarification and rolling assembly through an oil pipe. The outlet of the clarification and rolling assembly is connected to the inlet of the distillation unit through an oil pipe. The outlet of the distillation unit is connected to the waste oil tank and the clean oil tank through two oil pipes respectively.
[0005] For example, patent application number CN200710163473.3 discloses a process for regenerating rolling oil in aluminum strip and foil rolling mills. To solve the technical problem that rolling oil is difficult to recycle after it is contaminated, this invention uses a method where the contaminated rolling oil is stored in a sludge tank, filtered and preheated by a filter and then sent to a distillation column under vacuum conditions for circulating heating, vacuum distillation, and finally condensation and recovery.
[0006] For example, patent application number CN202010143216.9 discloses a device for recycling aluminum rolling oil, including a machine frame assembly, a distillation system, a condenser, a condensation system, a waste liquid collector, a water storage tank, and a circulation tank. The distillation system is located on one side of the machine frame assembly, the condenser is correspondingly located to the distillation system, the waste liquid collector is located next to the distillation system, the water storage tank is located next to the condensation system, the circulation tank is installed next to the water storage tank, and a horizontal centrifugal pump is installed next to the bottom of the circulation tank. The distillation system and the condenser are connected... A refrigeration pipe is installed at the bottom of the equipment. A pressure tank is connected to the distillation system. An eccentric reducer extends from the upper side of the distillation system and is connected to the condenser via a connecting flange. A round flange heater is installed at the bottom of the distillation system, and a water injection pipe is connected between the round flange heater and the distillation system. A new liquid tank is installed on the left side of the equipment frame assembly, and a liquid waiting tank is installed on the right side of the equipment frame assembly. A filter device is installed on the top of the liquid waiting tank, and a liquid level display device and an air compressor are installed next to the liquid waiting tank.
[0007] For example, patent application number CN200710043933.9 discloses an aluminum rolling oil distillation process. The process includes five steps: oil supply, distillation, reflux, finished oil discharge, and waste oil discharge. By precisely controlling the oil supply flow rate, reflux oil flow rate, heating temperature, and vacuum degree in the process, the physical and chemical properties of the aluminum rolling oil after distillation by this process are close to the physical and chemical properties of newly purchased aluminum rolling oil, which fully meets the oil requirements of the rolling process.
[0008] In existing technology, each rolling mill is equipped with a corresponding rolling oil circulation filter device. However, these devices are relatively large and require considerable space. A solution is to construct a basement beneath the rolling mill to collect and circulate the rolling oil, reducing pipeline length. However, if a basement is constructed, water seepage and low temperatures (condensation) will introduce water into the rolling oil. If this water is directly fed to the distillation unit, it will not only increase energy consumption but also shorten the unit's lifespan. Summary of the Invention
[0009] To address the aforementioned problems, this utility model provides an aluminum foil rolling oil recovery system. The system collects and recycles the rolling oil in a basement; and for the introduced water, an oil-water separator separates the aqueous phase, saving energy and ensuring the service life of the distillation unit. The technical solution is as follows:
[0010] This utility model provides a recycling system for aluminum foil rolling oil. The system includes a distillation unit, a clean oil tank, a recycling oil tank, N rolling oil circulation filtration devices, and N waste oil collection ditches. Each rolling mill is equipped with one rolling oil circulation filtration device and one waste oil collection ditch. The light phase outlet of the distillation unit is connected to the recycling oil tank via a pipeline. The system further includes a basement, an oil-water separator 1, a first oil pump, and a second oil pump 10. The basement is located directly below the rolling workshop. The rolling oil circulation filtration devices are located within the basement. The end of each waste oil collection ditch leads into the basement and is equipped with a waste oil tank. The waste oil outlet of the rolling oil circulation filtration device is connected to the waste oil tank via a pipeline. The N waste oil tanks are connected to the inlet of the oil-water separator 1 via an inlet pipe 2 with a valve assembly and the first oil pump. The oil phase outlet 18 of the oil-water separator 1 is connected to the distillation unit via an oil phase pipeline 3 with the second oil pump 10.
[0011] Specifically, the volume of the oil-water separator 1 in this embodiment of the present invention is 2-5m³. 3 .
[0012] Specifically, the depth of the basement in this embodiment of the present invention is 6-12m.
[0013] In this embodiment of the invention, the clean oil tank and the recovery oil tank are arranged side by side and located outside the rolling workshop. The recovery oil tank is connected to the rolling mill through a pipeline. The oil-water separator 1 is located next to the clean oil tank.
[0014] Furthermore, the system also includes an emergency storage tank. The clean oil tank, the recovery oil tank, and the emergency storage tank are arranged side by side. The emergency storage tank is connected to the oil outlet of the rolling oil circulation filter, the oil outlet of the rolling mill, and the waste oil tank through pipelines.
[0015] Furthermore, in this embodiment of the present invention, the oil inlet pipe 2 is provided with a first shut-off valve 4 and is connected to N waste oil tanks through N branch pipes, and the branch pipes are provided with control valves; the oil phase pipeline 3 is provided with a first reducer 6, a second reducer 7, a second shut-off valve 8, a first bellows 9, a second oil pump 10, a second bellows 11, a check valve 12 and a third shut-off valve 13 in sequence; the pipeline between the first reducer 6 and the second reducer 7 is bent downwards.
[0016] Furthermore, in this embodiment of the utility model, the oil-water separator 1 is provided with a glass tube level gauge 14, and a manhole 15 is provided at its lower part.
[0017] Specifically, in this embodiment of the present invention, the oil phase outlet 18 is located at the lower part of the oil-water separator 1, and the distance between it and the bottom of the oil-water separator 1 is 1 / 5 to 1 / 4 of the height of the oil-water separator 1.
[0018] Specifically, in this embodiment of the present invention, the second oil pump 10 is a self-priming pump 40ZW15-30B, and a pump seat rubber pad is provided between it and the ground.
[0019] The beneficial effects of the technical solution provided by this utility model embodiment are:
[0020] 1. The rolling oil can be collected and recycled in the basement, reducing the footprint and pipeline length.
[0021] 2. For the introduced water, the water phase is separated by an oil-water separator, which saves energy and ensures the service life of the distillation unit.
[0022] 3. Multiple rolling mills intermittently output to the oil-water separator, which then intermittently outputs to the distillation unit. A relatively small oil-water separator can handle the process.
[0023] 4. Set up emergency storage tanks to collect rolling oil in case of abnormalities. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the aluminum foil rolling oil recovery system in this embodiment of the present invention.
[0025] Figure 2 This is a structural diagram of the combination of oil-water separator, oil inlet pipe and oil phase pipeline;
[0026] Figure 3 This is a schematic diagram of an oil-water separator;
[0027] Figure 4 This is a top view of an oil-water separator.
[0028] In the diagram: 1. Oil-water separator, 2. Oil inlet pipe, 3. Oil phase pipeline, 4. First shut-off valve, 5. Water phase pipeline, 6. First reducer, 7. Second reducer, 8. Second shut-off valve, 9. First bellows, 10. Second oil pump, 11. Second bellows, 12. Check valve, 13. Third shut-off valve, 14. Glass tube level gauge, 15. Manhole, 16. Third reducer, 17. Fourth shut-off valve, 18. Oil phase outlet. Detailed Implementation
[0029] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.
[0030] Example 1
[0031] See Figure 1-4Example 1 provides a recycling system for aluminum foil rolling oil. The system includes a distillation unit, a clean oil tank, a recovery oil tank, an emergency storage tank, a basement, an oil-water separator 1, a first oil pump, a second oil pump 10, N rolling oil circulation filtration devices, and N waste oil collection ditches. The rolling workshop has N rolling mills. Each rolling mill is equipped with one rolling oil circulation filtration device and one waste oil collection ditch. The basement is located directly below the rolling workshop, with a depth of 6-12m. The rolling oil circulation filtration device, located in the basement, is used to filter relatively clean rolling oil for reuse (returning it to the rolling mill), a conventional technique in the field. The end of the waste oil collection ditch leads into the basement and is equipped with a waste oil tank (small, discharging intermittently after reaching a certain level). The waste oil outlet of the rolling oil circulation filtration device (discharging intermittently after a certain number of rolling oil circulations) is connected to the waste oil tank via a pipeline. N waste oil tanks are connected to the inlet of oil-water separator 1 via an inlet pipe 2 equipped with a valve group (selective) and a first oil pump. The oil phase outlet 18 (intermittent discharge) of oil-water separator 1 is connected to the distillation unit via an oil phase pipeline 3 equipped with a second oil pump 10, and its bottom water phase outlet is connected to a water phase pipeline 5 (output to the wastewater treatment system). The light phase outlet of the distillation unit is connected to a recovery oil tank located within the distillation workshop via a pipeline. The recovery oil tank is connected to the rolling mill via a pipeline. Clean oil tanks, recovery oil tanks, and emergency storage tanks are arranged side-by-side outside the rolling workshop; all are horizontal storage tanks. The emergency storage tank is connected to the drain port of the rolling oil circulation filter, the drain port of the rolling mill, and the waste oil tank via pipelines to output all rolling oil to the emergency storage tank in case of an anomaly in the rolling workshop. The clean oil tank is used to store unused rolling oil, and the recovery oil tank is used to store the rolling oil recovered from distillation.
[0032] Specifically, in this embodiment of the invention, the oil-water separator 1 is vertically arranged, and its volume is 2-5m³. 3 It is equipped with a glass tube level gauge 14 (vertically installed) and a manhole 15 at its lower part.
[0033] Specifically, in this embodiment of the invention, the oil phase outlet 18 is located at the lower part of the oil-water separator 1, and the distance between it and the bottom of the oil-water separator 1 is 1 / 5 to 1 / 4 of the height of the oil-water separator 1. After long-term monitoring, if the amount of water phase is relatively small, the oil phase outlet 18 can be set lower.
[0034] Specifically, in this embodiment of the present invention, a pump seat rubber pad is provided between the second oil pump 10 and the ground to reduce vibration (used in conjunction with a bellows).
[0035] Example 2
[0036] See Figure 2Example 2 provides a recycling system for aluminum foil rolling oil, which has a structure basically the same as that of Example 1, except that: in this example, the oil inlet pipe 2 is equipped with a first shut-off valve 4, which is connected to N waste oil tanks through N branch pipes, and control valves are installed on the branch pipes. The oil phase pipeline 3 is sequentially equipped with a first reducer 6, a second reducer 7, a second shut-off valve 8, a first bellows 9, a second oil pump 10, a second bellows 11, a check valve 12, and a third shut-off valve 13. The pipeline between the first reducer 6 and the second reducer 7 bends downwards. The water phase pipeline 5 is sequentially equipped with a third reducer 16 and a fourth shut-off valve 17.
[0037] Example 3
[0038] See Figure 1-2 Example 3 provides an aluminum foil rolling oil recovery system, which has the same structure as Example 2, except that the oil-water separator 1 in this example is located next to the clean oil tank.
[0039] Example 4
[0040] Example 4 provides a recycling system for aluminum foil rolling oil, the structure of which is basically the same as that of Example 2, except that the specifications of each structure in this example are shown in Table 1:
[0041] Table 1
[0042] .
[0043] Among them, the first shut-off valve 4 is an electric shut-off valve, and the check valve 12 is a swing check valve.
[0044] Example 5
[0045] Example 5 provides a system for recovering aluminum foil rolling oil, the structure of which is basically the same as that of Example 1, except that N in this example is 9; and the volume of the oil-water separator 1 is 3m³. 3 .
[0046] In this embodiment, the terms "first," "second," "third," and "fourth" serve only as distinctions and have no other special meaning. Valves, flow meters, or pumps may be installed on the pipelines connecting the various structures as needed.
[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A recovery system of aluminum foil rolling oil, comprising a rectifying device, a clean oil tank, a recovery oil tank, N rolling oil circulating filter devices and N contaminated oil collection channels; one rolling oil circulating filter device and one contaminated oil collection channel are arranged corresponding to each rolling mill, and a light phase outlet of the rectifying device is connected with the recovery oil tank through a pipeline; characterized in that, The system also includes a basement, an oil-water separator (1), a first oil pump, and a second oil pump (10); the basement is located directly below the rolling workshop, the rolling oil circulation filter is located in the basement, the end of the waste oil collection ditch leads into the basement and is equipped with a waste oil tank, and the waste oil outlet of the rolling oil circulation filter is connected to the waste oil tank through a pipeline; N waste oil tanks are connected to the inlet of the oil-water separator (1) through an oil inlet pipe (2) with a valve group and a first oil pump, and the oil phase outlet (18) of the oil-water separator (1) is connected to the distillation unit through an oil phase pipeline (3) with a second oil pump (10).
2. The recovery system of the aluminum foil rolling oil according to claim 1, characterized by, The oil-water separator (1) has a volume of 2-5 m 3 .
3. The recovery system of the aluminum foil rolling oil according to claim 1, characterized by, The depth of the basement is 6-12m.
4. The recovery system of the aluminum foil rolling oil according to claim 1, characterized by, The clean oil tank and the recovery oil tank are arranged side by side and located outside the rolling workshop. The recovery oil tank is connected to the rolling mill through a pipeline. The oil-water separator (1) is located next to the clean oil tank.
5. The recovery system of the aluminum foil rolling oil according to claim 4, characterized by, The system also includes an emergency storage tank. The clean oil tank, the recovery oil tank and the emergency storage tank are arranged side by side. The emergency storage tank is connected to the oil outlet of the rolling oil circulation filter, the oil outlet of the rolling mill and the waste oil tank through pipelines.
6. The recovery system of the aluminum foil rolling oil according to claim 1, characterized by, The oil inlet pipe (2) is equipped with a first shut-off valve (4) and is connected to N waste oil tanks through N branch pipes. The branch pipes are equipped with control valves. The oil phase pipeline (3) is equipped with a first reducer (6), a second reducer (7), a second shut-off valve (8), a first bellows (9), a second oil pump (10), a second bellows (11), a check valve (12), and a third shut-off valve (13) in sequence. The pipeline between the first reducer (6) and the second reducer (7) is bent downwards.
7. The aluminum foil rolling oil recovery system according to claim 1, characterized in that, The oil-water separator (1) is equipped with a glass tube level gauge (14), and a manhole (15) is provided at its lower part.
8. The aluminum foil rolling oil recovery system according to claim 1, characterized in that, The oil phase outlet (18) is located at the lower part of the oil-water separator (1), and the distance between it and the bottom of the oil-water separator (1) is 1 / 5 to 1 / 4 of the height of the oil-water separator (1).
9. The aluminum foil rolling oil recovery system according to claim 1, characterized in that, The second oil pump (10) is a self-priming pump 40ZW15-30B, and a pump seat rubber pad is provided between it and the ground.