Oil-water separator for scr4500 continuous casting and rolling production line and production system thereof

Abstract

The application discloses an oil-water separator for an SCR4500 continuous casting and rolling production line and a production system thereof, which comprises a settlement and mist capturing assembly, a primary oil-water separation filter screen, a secondary separation air outlet pipe, a secondary air inlet filter screen, a vacuum fan, a booster pipe and a vacuum filter machine; the vacuum filter machine comprises a vacuum chamber, a positive pressure cavity and a drainage pipe filter cloth; the vacuum chamber and the positive pressure cavity are arranged in the vacuum filter machine in a communication mode; the drainage pipe filter cloth is arranged on a joint section surface of the vacuum chamber and the positive pressure cavity; an air inlet of the vacuum fan is communicated with the vacuum chamber through an air inlet pipe; and an air outlet of the vacuum fan is communicated with the positive pressure cavity through a pipeline. Through the use of the oil-water separator, the filtering effect of the vacuum filter machine is improved, the stability is improved, the emulsion quality is improved, the problems of the inclusion defects on the surface of the wire rod and the high amount of oxidation powder are solved, and the product quality is improved.

Description

Technical Field

[0001] This application relates to the field of continuous casting technology, and in particular to an oil-water separator and its production system for an SCR4500 continuous casting and rolling production line. Background Technology

[0002] In the production of copper and copper alloy wire rods, the SCR4500 continuous casting and rolling production line requires the use of emulsion to wash and clean the surface of the cast billet. This removes the primary scaly oxide layer and the secondary powdery oxide layer, while simultaneously creating an emulsion vapor environment to isolate the copper surface from air, reducing the degree of oxidation of the cast billet and, to a certain extent, reducing the oxide layer on the wire rod surface. After this process, the rolling mill and rolls can be cooled. Therefore, the quality of the emulsion in this process directly plays a decisive role in the final quality of the copper product.

[0003] In the entire production process, the emulsion is recycled. To ensure the quality of the recycled emulsion, a vacuum filter is often used to remove a large number of metal oxide powder particles from the emulsion, in order to avoid the generation of excessive foam. In the existing treatment process, the recycled emulsion still produces a foam layer of up to 600 mm.

[0004] Equipment for emulsion filtration, such as the emulsion filter and copper rod continuous casting and rolling production system disclosed in CN201721714704.0, reduces the amount of emulsion adsorbed by the filter cloth by wetting the filter cloth, thereby reducing emulsion loss. However, this system does not use a vacuum filter and cannot solve the problem of excessive foam layer in vacuum filters.

[0005] Vacuum filters require vacuum extraction. Due to the presence of the foam layer, the machine draws the emulsion and foam mixture into the fan during vacuuming, resulting in a low vacuum level, only reaching 0.0333 atmospheres. However, the pressure required for the emulsion to pass through the filter cloth during filtration is 3-5 atmospheres. This excessively low vacuum level leads to poor emulsion filtration, causing a large amount of oxide powder to be carried back through the rolling process, resulting in product defects such as surface defects, poor flaw detection data, and excessive oxide layer thickness. Furthermore, the low vacuum level requires a large throughput, leading to frequent overload shutdowns of the vacuum filter, resulting in a high equipment failure rate and poor operating efficiency. In severe cases, it can even cause the vacuum fan to burn out. Additionally, the poor filtration effect increases the frequency of filter cloth replacement, raising production costs.

[0006] Currently, mainstream SCR production lines do not use oil-water separators to improve the filtration effect and operational stability of vacuum filters. At the same time, the oil-water separators on the market do not meet the usage requirements of vacuum filters in SCR4500 production lines.

[0007] There are mainly two types of oil-water separators on the current market according to different principles. One is to achieve three-phase separation of oil, water and gas through filter element filtration, and the other is to achieve oil-water separation through the density difference of oil, water and gas. The density difference type oil-water separator includes: centrifugal, impact and other forms.

[0008] The filter element filtration type oil-water separator cannot be used for the treatment of such emulsions: because the emulsion contains a large amount of copper oxide powder, and the particle diameter of the copper oxide powder with a relatively high content is mainly below 0.2mm and below 5μm. Moreover, the emulsified oil in the emulsion is evenly mixed with copper oxide powder and water. If a filter type oil-water separator is used, its filter element pores are relatively small, and it will be blocked after a short treatment time, resulting in high use and maintenance costs. At the same time, it cannot meet the needs of continuous production.

[0009] Neither the centrifugal nor the impact type of the density difference type oil-water separator can be used in the vacuum filter supporting the SCR4500 production line: because the density difference type oil-water separator requires the medium to enter the oil-water separator with pressure at the liquid inlet to provide separation power such as impact and centrifugal force, so as to achieve three-phase separation of oil, water and gas, and it is mainly used at the discharge end rather than the suction end. The SCR4500 vacuum filter extracts vacuum and uses atmospheric pressure to press air into the fan. Generally, the vacuum pressure it provides is only about 10% of the atmospheric pressure, greater than or equal to 0.01mpa, which is much lower than the minimum inlet air pressure requirement of about 0.2Mpa for general oil-water separators. Therefore, conventional oil-water separators do not meet the usage requirements of the emulsion vacuum filter.

[0010] At the same time, for the long-term use of the circulating emulsion, to avoid the growth of various microorganisms such as bacteria, it is necessary to regularly add bactericides for sterilization treatment to extend the use time of the circulating emulsion. Various microorganisms mainly adhere to the surface of the copper oxide powder. The existing treatment devices cannot effectively filter the copper oxide powder, which also leads to an increase in the amount of bactericides added to the emulsion, increasing the production cost.

[0011] As a result, the circulating emulsion used in the existing SCR4500 continuous casting and rolling production line cannot be effectively filtered, and the three phases of oil, water and gas cannot be separated after filtration, resulting in a large amount of copper oxide powder particles remaining in the circulating emulsion. The use of such circulating emulsion leads to serious various defects on the surface of the copper materials produced by continuous casting and rolling, affecting the quality of the produced copper materials.

[0012] The information disclosed in the background art section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Invention

[0013] This application addresses the aforementioned technical problems by providing an oil-water separator and its production system for an SCR4500 continuous casting and rolling production line. The oxide content on the surface of the wire rod after the oil-water separator decreases from 7.86 mg to 4.04 mg, and the copper powder content decreases by 48.6%, significantly improving product quality.

[0014] This application provides an oil-water separator and its production system for an SCR4500 continuous casting and rolling production line, including: a settling mist-collecting component, a primary oil-water separation filter, a secondary separation outlet pipe, a secondary inlet filter, a vacuum fan, a booster pipe, and a vacuum filter.

[0015] The vacuum filter includes: a vacuum chamber, a positive pressure chamber, a drain pipe, and a filter cloth; the vacuum filter contains an interconnected vacuum chamber and a positive pressure chamber; a drain pipe and filter cloth are installed at the interface between the vacuum chamber and the positive pressure chamber; the air inlet of the vacuum fan is connected to the vacuum chamber through an air inlet pipe; the air outlet of the vacuum fan is connected to the positive pressure chamber pipeline.

[0016] The primary oil-water separator filter is housed at one end of the first pipe section, and the other end of the first pipe section is connected to the air inlet pipe; the secondary air inlet filter is housed at one end of the secondary separation air inlet pipe, and one end of the secondary separation air inlet pipe is also connected to the lower side wall of the settling mist eliminator; the other end of the secondary separation air inlet pipe is connected to the air inlet pipe outside the first pipe section; the extension end of the air inlet pipe is connected to the secondary separation air outlet pipe; the extension end of the secondary separation air outlet pipe is connected to the top of the settling mist eliminator.

[0017] The settling mist-catching assembly includes: a cylinder and a multi-stage mist catching device and a multi-stage settling chamber housed within the cylinder; the multi-stage mist catching device divides the cylinder into multiple settling chambers;

[0018] The gas emulsion mixture is drawn by a vacuum blower and passes through a primary oil-water separator to remove emulsion droplets with a particle size greater than 2 mm. Then, it enters a secondary separation outlet pipe where a secondary intake filter removes emulsion droplets with a particle size greater than 1 mm. After that, some of the gas enters a settling and mist-catching assembly for vapor-liquid separation. Finally, the gas enters the vacuum blower from the top of the settling and mist-catching assembly.

[0019] A positive pressure of 1.1 times atmospheric pressure is formed in the positive pressure chamber, while a negative pressure of 12% atmospheric pressure is formed in the vacuum chamber.

[0020] Preferably, it includes: an air intake resistance pipe and a primary atomizer; an air outlet is opened on the side wall of one end of the secondary separation air intake pipe that houses the secondary air intake filter and is connected to one end of the air intake resistance pipe; the other end of the air intake resistance pipe extends into the primary settling chamber in the lower part of the settling mist collection assembly and is fitted with the primary atomizer in the extended end.

[0021] Preferably, the settling mist-catching assembly includes: a fine atomizing plate, a coarse atomizing plate, a secondary mist catching device, and a tertiary mist catching device, all housed within the cylinder; the fine atomizing plate, the coarse atomizing plate, the secondary mist catching device, and the tertiary mist catching device are arranged alternately within the cylinder.

[0022] Fine atomizing plates and coarse atomizing plates are stacked and the lower inner cavity of the cylinder is divided into a secondary settling chamber and a primary settling chamber;

[0023] The three-stage mist eliminator divides the upper inner cavity of the cylinder into an exhaust chamber and a tertiary settling chamber; the second-stage mist eliminator is located at the interface between the tertiary settling chamber and the tertiary settling chamber.

[0024] Preferably, it includes: a secondary separation drain hole and a primary separation drain outlet; a secondary separation drain hole is opened on the bottom surface of the first pipe section; a primary separation drain outlet is opened at the bottom of the secondary separation air intake pipe.

[0025] Preferably, it includes: a water storage chamber; the water storage chamber is disposed on the bottom surface of the cylinder and is connected to the cylinder.

[0026] Preferably, it includes: a liquid level sensor, a manual drain pipe, and an automatic drainer; the manual drain pipe and the automatic drainer are spaced apart on the water storage chamber; the liquid level sensor is installed inside the water storage chamber and is electrically connected to the automatic drainer.

[0027] Preferably, it includes: a primary settlement chamber door, a secondary settlement chamber door, a tertiary settlement chamber door, and an exhaust chamber door; the primary settlement chamber door is disposed on the side wall of the primary settlement chamber; the secondary settlement chamber door is disposed on the side wall of the secondary settlement chamber; the tertiary settlement chamber door is disposed on the side wall of the tertiary settlement chamber; and the exhaust chamber door is disposed on the side wall of the exhaust chamber.

[0028] Preferably, it includes: an air inlet damper; the air inlet damper is disposed on the air inlet pipe of the vacuum blower.

[0029] Another aspect of this application provides a production system, including: multiple rolling mills connected in series, an emulsion collection rack, an emulsion spraying assembly, and an oil-water separator as described above;

[0030] The emulsion collection rack is installed on one side of multiple rolling mills connected in series to collect circulating emulsion;

[0031] The emulsion spraying assembly is installed on the emulsion spraying side of multiple tandem rolling mills;

[0032] The emulsion collection rack is connected to the inlet pipe of the vacuum filter;

[0033] The vacuum chamber outlet of the vacuum filter is connected to the emulsion spraying assembly pipeline;

[0034] The vacuum blower extracts the emulsion-gas mixture from the vacuum chamber and passes it into the oil-water separator mentioned above for the separation of emulsion and gas;

[0035] The outlet of the vacuum blower is connected to the vacuum filter through a booster pipe, and the gas that has separated the emulsion and copper oxide powder is discharged into the vacuum filter. The gas is pressurized in the positive pressure chamber 25, forming a positive pressure of greater than or equal to 1.1 times the atmospheric pressure in the positive pressure chamber 25, while a negative pressure of 12% of the atmospheric pressure is formed in the vacuum chamber 22.

[0036] Preferably, the multiple rolling mills connected in series include: a 16-inch rolling mill, a 12-inch horizontal rolling mill, a 12-inch vertical rolling mill, and an 8-inch rolling mill arranged in series; the billet passes through the 16-inch rolling mill, the 12-inch horizontal rolling mill, the 12-inch vertical rolling mill, and the 8-inch rolling mill in sequence;

[0037] Preferably, it includes: an automatic drain emulsion pump and an emulsion supply pipe; one end of the emulsion supply pipe is connected to the emulsion spraying assembly, and the other end is connected to the vacuum chamber; the automatic drain emulsion pump is installed on the emulsion supply pipe.

[0038] The beneficial effects that this application can produce include:

[0039] 1) The oil-water separator and its production system for the SCR4500 continuous casting and rolling production line provided in this application improve the filtration effect of the vacuum filter through the use of the oil-water separator.

[0040] The system improves stability, thereby enhancing emulsion quality and resolving issues such as surface inclusions and high levels of oxidized powder on the wire rod, thus improving product quality. Secondly, it addresses the problems of frequent overload shutdowns and burnouts in the vacuum filter of the SCR4500 continuous casting and rolling production line. Thirdly, it increases the efficiency of filter cloth usage, reduces the number of filter cloths needed, and lowers production costs.

[0041] 2) The oil-water separator and its production system for the SCR4500 continuous casting and rolling production line provided in this application can effectively improve the filtration effect and operational stability of the vacuum filter and enhance the quality of the filtered emulsion after using the oil-water separator. Sampling tests have shown that after using the oil-water separator, the copper oxide powder content in the circulating emulsion has decreased from about 20% before use to 1.36%, effectively solving the problems of oxide scale defects and high oxide powder content on the surface of the wire rods obtained from the SCR4500 continuous casting and rolling production line. After using the oil-water separator, the oxide content on the surface of the wire rods decreased from 7.86 mg to 4.04 mg, and the copper powder content decreased by 48.6%, significantly improving product quality.

[0042] 3) The oil-water separator and its production system for the SCR4500 continuous casting and rolling production line provided in this application not only improve the filtration effect, but also improve the efficiency of filter cloth use, reducing the number of filter cloths used by about 40.6%. At the same time, it increases the total amount of bacteria that are separated from the emulsion with the oxidation powder, effectively inhibiting the reproduction of bacteria in the circulating emulsion. Under the same dose of bactericide, the emulsion index is maintained for a longer time, and the amount of bactericide used is reduced, effectively reducing the production cost.

[0043] 4) The oil-water separator and its production system for the SCR4500 continuous casting and rolling production line provided in this application solve the problem of frequent overload shutdowns and burnouts of the vacuum filter in the SCR4500 continuous casting and rolling production line by implementing the oil-water separator. The use of the oil-water separator significantly reduces the wear rate of the rolling mill nozzles and emulsion injectors, extending their service life. This oil-water separator is characterized by reliable operation, ease of use, resistance to clogging, and a long cleaning cycle. Attached Figure Description

[0044] Figure 1 A schematic diagram of the oil-water separator for the SCR4500 continuous casting and rolling production line provided in this application;

[0045] Figure 2 This is a schematic diagram of the main structure of the continuous casting and rolling production line provided in this application;

[0046] Legend:

[0047] 1. Billet casting; 2. 16-inch rolling mill; 3. 12-inch horizontal rolling mill; 4. 12-inch vertical rolling mill; 5. Emulsion supply pipe; 6. 8-inch rolling mill (8 units); 7. Emulsion collection rack; 8. Pressure booster pipe; 9. Vacuum fan; 10. Fan inlet damper; 11. Three-stage mist eliminator; 12. Two-stage mist eliminator; 13. Fine atomizing plate; 14. Coarse atomizing plate; 15. Manual drain pipe; 16. Primary atomizer; 17. Two-stage inlet filter; 18. Automatic drainer; 19. Two-stage separation inlet pipe; 20. First-stage oil-water separator filter; 21. First pipe section, filter plate; 22. Vacuum chamber; 23. Automatic drain emulsion pump; 24. Drain pipe filter cloth; 25. Positive pressure chamber; 26. Vacuum filter; 27. Two-stage separation outlet pipe.

[0048] Exhaust chamber 28, exhaust chamber door 29, tertiary settling chamber door 30, tertiary settling chamber 31, secondary settling chamber door 32, secondary settling chamber 33, primary settling chamber 34, primary settling chamber door 35, water storage chamber 36, air intake resistance pipe 37, secondary separation drain hole 38, primary separation drain outlet 39, primary oil-water separator pipe 40. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0051] Technical means not detailed in this application and not used to solve the technical problems of this application are all set according to common general knowledge in the field, and multiple common general knowledge setting methods can be implemented.

[0052] See Figures 1-2 The oil-water separator for the SCR4500 continuous casting and rolling production line provided in this application acts on a vacuum filter 26. The vacuum filter 26 processes the emulsion collected by the emulsion collection rack 7. The emulsion collection rack 7 is located below multiple continuous rolling mills of the SCR4500 continuous casting and rolling production line and is used to recover the circulating emulsion.

[0053] The primary oil-water separator 40 is connected to the side wall of the vacuum chamber 22 of the emulsion filter 26. A filter plate 21 is installed on the interface between the vacuum chamber 22 and the primary oil-water separator 40. The negative pressure chamber of the vacuum chamber 22 is filled with the recycled emulsion, i.e., the air-emulsion mixture (a mixture of emulsified oil, alcohol, chemicals, and deionized water suspension, hereinafter the same). After the recycled emulsion passes through the filter plate 21, the filter plate 21 intercepts various solid impurities, such as large oxide scale particles larger than 3 mm, preventing such impurities from entering the oil-water separator.

[0054] The vacuum chamber 22 of the vacuum filter 26 is connected to the primary oil-water separator 40; the primary oil-water separator 40 is connected to the air inlet pipe of the vacuum blower 9 through a first pipe section; a primary oil-water separator filter 20 is housed in the lower part of the first pipe section; a primary separation drain outlet 39 is provided on the bottom surface of the first pipe section. The extension end of the air inlet pipe of the air blower 9 is connected to the secondary separation outlet pipe 27; the pipe between the first pipe section and the secondary separation outlet pipe 27 is connected to one end of the secondary separation inlet pipe 19. A secondary intake filter 17 is installed in the bottom of the other end of the secondary separation inlet pipe 19, and a secondary separation drain hole 38 is provided on the bottom surface of the secondary separation inlet pipe 19 for periodically opening and cleaning the secondary intake filter 17.

[0055] An outlet is opened on the side wall of the secondary air intake filter 17 at the lower part of the secondary air intake pipe 19 and is connected to one end of the air intake resistance pipe 37; the air intake resistance pipe 37 is housed in the lower part of the primary settling chamber 34, and the other end of the air intake resistance pipe 37 is set towards the water storage chamber 36 at the bottom of the primary settling chamber 34; at the same time, the primary atomizer 16 is housed in the other end of the air intake resistance pipe 37.

[0056] In one specific embodiment, a manual drain pipe 15 is provided on one side of the secondary separation drain hole 38; an automatic drainer 18 is provided on the other side of the secondary separation drain hole 38 for periodic drainage.

[0057] The other end of the secondary separation outlet pipe 27 is connected to the top of the settling mist eliminator assembly; the settling mist eliminator assembly includes: a cylinder and a multi-stage mist eliminator housed within the cylinder; the inner cavity of the cylinder is divided into multiple chambers by the mist eliminators at each stage to achieve the separation and recovery of the emulsion contained in the gas. The bottom surface of the settling mist eliminator assembly is positioned directly opposite the water storage chamber 36 to collect the liquid obtained from the gas-liquid separation.

[0058] In one specific embodiment, an exhaust chamber 28 is provided at the upper part of the cylinder, an openable and closable exhaust chamber door 29 is provided on the side wall of the exhaust chamber 28, and a three-stage mist eliminator 11 is provided on the bottom surface of the exhaust chamber 28; a three-stage settling chamber 31 is provided in the cavity below the exhaust chamber 28, an openable and closable three-stage settling chamber door 30 is provided on the side wall of the three-stage settling chamber 31, and a two-stage mist eliminator 12 is provided on the bottom surface of the three-stage settling chamber 31.

[0059] In one specific embodiment, a secondary settling chamber 33 is provided in the cylindrical cavity below the tertiary settling chamber 31, and an openable and closable secondary settling chamber door 32 is provided on the side wall of the secondary settling chamber 33. A fine atomizing plate 13 is provided on the bottom surface of the secondary settling chamber 33, and a coarse atomizing plate 14 is provided on the bottom surface of the fine atomizing plate 13.

[0060] In one specific embodiment, a primary settling chamber 34 is provided in the inner cavity of the cylinder below the secondary settling chamber 33, and an openable and closable primary settling chamber door 35 is provided on the side wall of the primary settling chamber 34.

[0061] The oil-water separator is equipped with four doors: a primary settling chamber door 35, a secondary settling chamber door 32, a tertiary settling chamber door 30, and an exhaust chamber door 29, which facilitates the periodic cleaning of copper oxide powder in each stage inside the cylinder.

[0062] By incorporating multiple chambers within the settling mist-eliminating assembly, the gas flow rate can be slowed down, the separation time of the atomized gas can be extended, the oil-water separation effect can be increased, and more than 95% of the emulsion and more than 99% of the oxidized powder can be eliminated.

[0063] In one specific embodiment, a blower inlet damper 10 is provided on the inlet pipe of the vacuum blower 9, and the pipe extending outward from the blower inlet damper 10 is connected to the positive pressure chamber 25 of the vacuum filter 26 through a booster pipe 8. This achieves effective pressurization of the vacuum filter 26.

[0064] When the oil-water separator is in use, the vacuum fan 9 is connected to the negative pressure chamber of the vacuum filter 26 through a pipeline. The negative pressure generated by the vacuum fan 9 draws out the emulsion mixed in the collected gas. After passing through the primary oil-water separation filter 20, the emulsion disperses into droplets. The primary oil-water separation filter 20 can prevent droplets larger than 2mm from leaving the primary oil-water separation tube 40. Most droplets with a particle size of 2mm or larger drip rapidly in the channel of the primary oil-water separation tube 40 and flow back to the vacuum chamber 22 when the damper is closed. Then, they flow irreversibly back from the vacuum chamber 22 to the emulsion tank in the vacuum filter 26 for collection, so as to clean it regularly. At the same time, the primary separation drain port 39 located at the bottom of the primary oil-water separation filter 20 can be opened regularly to clean the primary oil-water separation filter 20.

[0065] Almost all droplets with a particle size of less than 500μm rise with the air along the first pipe section and enter the secondary separation air intake pipe 19. The bottom of the secondary separation air intake pipe 19 is equipped with a secondary separation air intake filter 17, which reliquefies the emulsion in the gas-liquid mixture and flows into the air intake resistance pipe 37. The secondary separation air intake filter 17 can also block some copper oxide powder in the gas-liquid mixture. The secondary separation drain hole 38 can be opened periodically to clean the secondary separation air intake filter 17.

[0066] The emulsion entering the air intake resistance tube 37 passes through the small hole of the primary atomizer 16 and undergoes primary atomization. Droplets larger than 1 mm fall directly into the water storage chamber 36. Some of the droplets larger than 100 micrometers in the water vapor generated by atomization settle during the upward movement. The remaining mixed water vapor continues to pass through the coarse atomizing plate 14 and the fine atomizing plate 13 in sequence. The droplet size in the water vapor is 5-100 μm. Droplets larger than 100 μm enter the secondary settling chamber 33 and collide with each other, gradually growing larger. As the emulsion droplets pass through the secondary mist eliminator 12, they adhere to the wire mesh, condense, and gather before dripping. Most of the airborne emulsion is blocked before the secondary mist eliminator 12. The remaining small portion of droplets with a diameter less than 50 μm continues to rise to the tertiary settling chamber 31. During the ascent, some droplets collide and gather, growing in diameter before dripping. A small amount of remaining water vapor rises to the tertiary mist eliminator 11, where it repeats the process of adhering, condensing, and gathering on the wire mesh before dripping. By this point, most of the emulsion and air have been separated. The emulsion droplet content in the air entering the exhaust chamber 28 is reduced. The emulsion dripping from the entire settling mist eliminator assembly eventually collects in the water storage chamber 36, effectively separating the oil-water-air mixture in the air inlet of the vacuum filter 26. This effectively reduces the height of foam formation, effectively recovers the emulsion, and filters the emulsion droplets in the recovery process step by step. Copper oxide powder contained in the emulsion, existing in droplet form, is more easily filtered and removed, thus effectively improving the filtration effect of copper oxide powder in the emulsion.

[0067] In one specific embodiment, a manual drain pipe 15 is provided on one side of the water storage chamber 36; an automatic drainer 18 is provided on the other side of the secondary separation drain hole 38 for periodic drainage. A liquid level sensor is provided on the inner wall of the water storage chamber 36, and the liquid level sensor is electrically connected to the automatic drainer 18. When the liquid level is higher than the set liquid level of the automatic drainer 18, excess emulsion can be automatically discharged. When complete drainage is required, the manual drain pipe 15 is used for drainage.

[0068] The oil-water separator effectively separates the gasoline-gas mixture in the vacuum chamber 22 and applies pressure to the positive pressure chamber 25 via the vacuum fan 9, creating a positive pressure greater than or equal to 1.1 times atmospheric pressure within the positive pressure chamber 25. Simultaneously, a negative pressure of 12% of atmospheric pressure (approximately 100 mmHg) is created within the vacuum chamber 22. Under the combined effect of these two pressures, the vacuum filter 26 reaches the required filtration pressure, significantly improving filtration efficiency and effectively reducing the content of oxides, impurities, and bacteria in the circulating emulsion.

[0069] Another aspect of this application provides a production system, including: multiple rolling mills connected in series, an emulsion collection rack 7, a vacuum fan 9, a vacuum filter 26, a positive pressure chamber 25, a drain pipe filter cloth 24, an emulsion spraying assembly, and an oil-water separator as described above; the emulsion collection rack 7 is disposed on one side of the multiple rolling mills connected in series for collecting circulating emulsion; the emulsion spraying assembly is disposed on the emulsion spraying side of the multiple rolling mills connected in series; the emulsion collection rack 7 is connected to the inlet pipe of the vacuum filter 26; the vacuum filter 26 contains a positive pressure chamber 25 and a vacuum chamber 22, and a drain pipe filter cloth 24 is disposed on the interface connecting the positive pressure chamber 25 and the vacuum chamber 22; the vacuum chamber 22 is connected to the emulsion spraying assembly via a pipeline;

[0070] The vacuum chamber 22 in the vacuum filter 26 is connected to the air inlet pipe of the vacuum blower 9. An oil-water separator as described above is installed on the connecting pipe. The vacuum blower 9 extracts the emulsion-containing gas from the vacuum chamber 22 and passes it into the oil-water separator as described above for the separation of emulsion and gas.

[0071] The outlet of the vacuum blower 9 is connected to the vacuum filter 26 through the booster pipe 8, and the gas that has separated the emulsion and copper oxide powder is discharged into the vacuum filter 26.

[0072] The vacuum blower 9 applies pressure to the positive pressure chamber 25 through the pressure boosting pipe 8, forming a positive pressure greater than or equal to 1.1 times the atmospheric pressure in the positive pressure chamber 25, while at the same time forming a negative pressure of 12% of the atmospheric pressure (about 100 mmHg) in the vacuum chamber 22.

[0073] The production system separates the emulsion and copper oxide powder. The air is discharged through the booster pipe 8 into the positive pressure chamber 25, which is connected to the vacuum filter 26. Pressure is applied to the positive pressure chamber 25, creating a positive pressure greater than or equal to 1.1 times atmospheric pressure. Simultaneously, a negative pressure of 12% of atmospheric pressure (approximately 100 mmHg) is created in the vacuum chamber 22. Through the combined effect of these two pressures, the vacuum filter 26 achieves the necessary filtration pressure, significantly improving filtration efficiency and effectively reducing the content of oxides, impurities, and bacteria in the emulsion. The emulsion flowing through the positive pressure chamber 25 is filtered through the drain pipe filter cloth 24 located between the positive pressure chamber 25 and the vacuum chamber 22, resulting in a clean emulsion that is recycled. This effectively reduces the impurity content in the circulating emulsion and improves the quality of the rolled parts.

[0074] The clean emulsion is supplied to the 16-inch rolling mill 2, the 12-inch horizontal rolling mill 3, the 12-inch vertical rolling mill 4, and the 8-inch rolling mill (8 units) 6 via the emulsion pump 23 and the emulsion supply pipe 5 for cooling, cleaning, reduction, and lubrication of the casting 1, thereby enabling the casting 1 to obtain better surface quality during the rolling process and significantly reducing the copper powder content of the final product.

[0075] In one specific embodiment, it includes: an automatic drainage emulsion pump 23; the automatic drainage emulsion pump 23 is disposed on the pipeline connecting the vacuum chamber 22 and the emulsion spraying assembly, specifically it can be an emulsion supply pipe 5.

[0076] In one specific embodiment, the multiple rolling mills connected in series include: a 16-inch rolling mill 2, a 12-inch horizontal rolling mill 3, a 12-inch vertical rolling mill 4, and an 8-inch rolling mill (8 units) 6 arranged in series. The billet 1 passes through the 16-inch rolling mill 2, the 12-inch horizontal rolling mill 3, the 12-inch vertical rolling mill 4, and the 8-inch rolling mill (8 units) 6 in sequence.

[0077] Example

[0078] See Figures 1-2 In practical use, the emulsion in the SCR continuous casting and rolling production line is filtered through a vacuum filter. The oil-water-gas separator is equipped with a primary oil-water separator (40) and a secondary oil-water separator (11-38), which are installed between the vacuum chamber 2 of the emulsion filter and the air damper 5 of the vacuum fan. When the liquid level in the filter is higher than the set value, the air damper opens, and the vacuum fan 3 draws air from the vacuum chamber, drawing a large amount of air, emulsion foam, and copper oxide powder into the oil-water separator. Through the action of the two-stage oil-water separator, the emulsion and copper oxide powder are separated, improving the filtration effect of the vacuum filter, greatly improving the emulsion quality and rolling effect, and thus improving the product quality.

[0079] Comparative Example

[0080] The difference from Example 1 is that the oil-water separator described above was not used.

[0081] 1. Copper oxide powder content detection:

[0082] The detection method involves determining the solid content of randomly sampled emulsion samples by drying and gravity method.

[0083] In the examples and comparative examples, the content of copper oxide powder in the circulating emulsion was 1.36% and 20%, respectively. This demonstrates that using this oil-water separator can effectively reduce the content of copper oxide powder in the circulating emulsion, thereby reducing various surface defects on copper materials caused by the copper oxide powder in the emulsion and improving the quality of the produced copper materials.

[0084] 2. Oxide content detection on the surface of copper poles:

[0085] The testing method is as follows: the copper powder content of randomly sampled copper materials is determined by dry brushing method, GB / T3952-2016 Appendix A.

[0086] The oxide content on the surface of the copper samples obtained in the comparative and examples decreased from 7.86 mg to 4.04 mg. This indicates that the use of this oil-water separator can effectively reduce the amount of residual copper oxide on the copper surface, thereby reducing the amount of surface defects and improving the quality of the copper.

[0087] 3. Detection of copper powder content on the surface of the copper pole:

[0088] The testing method is as follows: the copper powder content of randomly sampled copper materials is determined by dry brushing method, GB / T3952-2016 Appendix A.

[0089] The copper powder content on the surface of the copper material obtained in the example decreased by 48.6% compared to the comparative example. This indicates that the separator can effectively reduce the residual copper oxide content on the surface of copper materials.

[0090] 4. Record the filter cloth usage in the examples and comparative examples. According to the statistical results, the amount of filter cloth used in the examples is reduced by about 40.6% compared with the comparative example. This shows that the use of this oil-water separator can effectively reduce the amount of filter cloth used.

[0091] According to the production records, after adopting the oil-water separator in the example, the vacuum filter did not experience overload shutdown or burnout after one year of continuous production.

[0092] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An oil-water separator for an SCR4500 continuous casting and rolling production line, characterized in that, include: Settling mist-collecting assembly, primary oil-water separator filter, secondary separator outlet pipe, secondary intake filter, vacuum fan, booster pipe, vacuum filter; The vacuum filter includes: a vacuum chamber, a positive pressure chamber, a drain pipe, and a filter cloth; the vacuum filter contains an interconnected vacuum chamber and a positive pressure chamber; a drain pipe and a filter cloth are installed at the interface between the vacuum chamber and the positive pressure chamber; the air inlet of the vacuum blower is connected to the vacuum chamber through an air inlet pipe; the air outlet of the vacuum blower is connected to the positive pressure chamber pipeline. The primary oil-water separator filter is housed at one end of the first pipe section, and the other end of the first pipe section is connected to the air inlet pipe; the secondary air inlet filter is housed at one end of the secondary separation air inlet pipe, and one end of the secondary separation air inlet pipe is also connected to the lower side wall of the settling mist eliminator; the other end of the secondary separation air inlet pipe is connected to the air inlet pipe outside the first pipe section; the extension end of the air inlet pipe is connected to the secondary separation air outlet pipe; the extension end of the secondary separation air outlet pipe is connected to the top of the settling mist eliminator. The settling mist-catching assembly includes: a cylinder and a multi-stage mist catching device and a multi-stage settling chamber housed within the cylinder; the multi-stage mist catching device divides the cylinder into multiple settling chambers; The gas emulsion mixture is drawn by a vacuum blower and passes through a primary oil-water separator to remove emulsion droplets with a particle size greater than 2 mm. Then, it enters a secondary separation outlet pipe where a secondary intake filter removes emulsion droplets with a particle size greater than 1 mm. After that, some of the gas enters a settling and mist-catching assembly for vapor-liquid separation. Finally, the gas enters the vacuum blower from the top of the settling and mist-catching assembly. A positive pressure of 1.1 times atmospheric pressure is formed in the positive pressure chamber, while a negative pressure of 12% atmospheric pressure is formed in the vacuum chamber. Includes: an air intake resistance tube and a primary atomizer; an air outlet is opened on the side wall of the secondary separation air intake tube that houses the secondary air intake filter and is connected to one end of the air intake resistance tube; the other end of the air intake resistance tube extends into the primary settling chamber in the lower part of the settling mist collection assembly, and the primary atomizer is installed in the extended end.

2. The oil-water separator for the SCR4500 continuous casting and rolling production line according to claim 1, characterized in that, The settling mist-catching assembly includes: a fine atomizing plate, a coarse atomizing plate, a secondary mist catching device, and a tertiary mist catching device, all housed within the cylinder; the fine atomizing plate, the coarse atomizing plate, the secondary mist catching device, and the tertiary mist catching device are arranged alternately within the cylinder. Fine atomizing plates and coarse atomizing plates are stacked and the lower inner cavity of the cylinder is divided into a secondary settling chamber and a primary settling chamber; The three-stage mist eliminator divides the upper inner cavity of the cylinder into an exhaust chamber and a tertiary settling chamber; the second-stage mist eliminator is located at the interface between the tertiary and secondary settling chambers.

3. The oil-water separator for the SCR4500 continuous casting and rolling production line according to claim 1, characterized in that, include: Secondary separation sewage outlet and primary separation sewage outlet; a primary separation sewage outlet is opened on the bottom surface of the first pipe section; A secondary separation drain outlet is provided at the bottom of the secondary separation air intake pipe.

4. The oil-water separator for the SCR4500 continuous casting and rolling production line according to claim 1, characterized in that, include: Water storage chamber; The water storage chamber is located on the bottom surface of the cylinder and is connected to the cylinder.

5. The oil-water separator for the SCR4500 continuous casting and rolling production line according to claim 4, characterized in that, Includes: a liquid level sensor, a manual drain pipe, and an automatic drainer; the manual drain pipe and the automatic drainer are spaced apart on the water storage chamber; the liquid level sensor is installed inside the water storage chamber and is electrically connected to the automatic drainer.

6. The oil-water separator for the SCR4500 continuous casting and rolling production line according to claim 2, characterized in that, include: The system includes a primary settlement chamber door, a secondary settlement chamber door, a tertiary settlement chamber door, and an exhaust chamber door. The primary settlement chamber door is located on the side wall of the primary settlement chamber. The secondary settlement chamber door is located on the side wall of the secondary settlement chamber. The tertiary settlement chamber door is located on the side wall of the tertiary settlement chamber. The exhaust chamber door is located on the side wall of the exhaust chamber.

7. The oil-water separator for the SCR4500 continuous casting and rolling production line according to claim 1, characterized in that, include: Air intake damper; the air intake damper is installed on the air intake pipe of the vacuum blower.

8. A production system, characterized in that, include: Multiple rolling mills connected in series, emulsion collection rack, emulsion spraying assembly, and oil-water separator as described in any one of claims 1 to 7; The emulsion collection rack is installed on one side of multiple rolling mills connected in series to collect circulating emulsion; The emulsion spraying assembly is installed on the emulsion spraying side of multiple tandem rolling mills; The emulsion collection rack is connected to the inlet pipe of the vacuum filter; The vacuum chamber outlet of the vacuum filter is connected to the emulsion spraying assembly pipeline; A vacuum blower extracts the emulsion-gas mixture from the vacuum chamber and passes it into the oil-water separator as described in any one of claims 1 to 7 for the separation of the emulsion and gas; The outlet of the vacuum blower is connected to the vacuum filter through a booster pipe, and the gas that has separated the emulsion and copper oxide powder is discharged into the vacuum filter. The gas is pressurized in the positive pressure chamber, forming a positive pressure of greater than or equal to 1.1 times the atmospheric pressure, while a negative pressure of 12% of the atmospheric pressure is formed in the vacuum chamber.

9. The production system according to claim 8, characterized in that, The multiple rolling mills connected in series include: a 16-inch rolling mill, a 12-inch horizontal rolling mill, a 12-inch vertical rolling mill, and an 8-inch rolling mill arranged in series; the billet passes through the 16-inch rolling mill, the 12-inch horizontal rolling mill, the 12-inch vertical rolling mill, and the 8-inch rolling mill in sequence.

10. The production system according to claim 8, characterized in that, include: An automatic drain emulsion pump and an emulsion supply pipe; one end of the emulsion supply pipe is connected to the emulsion spraying assembly, and the other end is connected to the vacuum chamber; the automatic drain emulsion pump is installed on the emulsion supply pipe.

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