CN116791099A - Combined type strip degreasing system and method - Google Patents

Abstract

The invention relates to a combined type strip degreasing system which comprises a front cleaning section, a dry degreasing section and a rear cleaning section which are sequentially connected along the running direction of a strip, wherein a strip drying unit is respectively arranged at a strip outlet of the front cleaning section and a strip outlet of the rear cleaning section. The invention further relates to a strip degreasing method based on the system. According to the invention, a combined degreasing process of a front cleaning section, a dry degreasing section and a rear cleaning section is adopted, so that the degreasing operation of the surface of the strip material can be efficiently and reliably carried out; based on the combined degreasing process, the cleaning liquid only adopts desalted water, namely only adopts a physical degreasing means, thereby being environment-friendly.

Description

Combined type strip degreasing system and method

Technical Field

The invention belongs to the technical field of metallurgical production, and particularly relates to a combined type strip degreasing system and method.

Background

In the cold rolling process of the strip steel, a layer of oil film and iron powder accompanying the oil film remain on the surface of the strip steel after the rolling is finished due to the lubrication and cooling. Before the annealing treatment process is carried out on the cold-rolled strip steel, the surface of the cold-rolled strip steel must be cleaned, otherwise, the quality defects of nodulation, uneven plating and the like in the furnace are easily caused.

At present, almost all cold rolling treatment lines with annealing procedures are provided with special degreasing sections, the degreasing sections generally consist of procedures such as alkali spray washing, alkali brushing, electrolytic cleaning, water brushing, multi-stage rinsing, drying and the like, chemical degreasing agents are used for alkali spray, alkali brushing and electrolytic cleaning, alkali mist harmful to the environment can be generated in the process, meanwhile, the continuous discharge of alkali-containing waste liquid also brings about larger environment-friendly treatment pressure, a large amount of waste rinsing water generated in the rinsing section cannot be directly recycled due to sodium salt or potassium salt, and the cost of online treatment and recycling is too high, so a large amount of rinsing waste water is directly discharged to a waste water treatment station, and great water resource waste is caused.

Disclosure of Invention

The invention relates to a combined type strip degreasing system and a method, which can at least solve part of defects in the prior art.

The invention relates to a combined type strip degreasing system which comprises a front cleaning section, a dry degreasing section and a rear cleaning section which are sequentially connected along the running direction of a strip, wherein a strip drying unit is respectively arranged at a strip outlet of the front cleaning section and a strip outlet of the rear cleaning section.

As one embodiment, the front cleaning section comprises a leaching tank, a first high-pressure spraying tank, at least one section of front brushing tank and a second high-pressure spraying tank which are sequentially connected along the running direction of the strip.

As one of the implementation modes, the front cleaning section is also provided with a cleaning liquid circulating tank and a filtering water tank, and the front brushing groove is provided with two sections; the washing liquid outlet of the soaking tank, the first high-pressure spraying tank, the first front brushing tank and the second high-pressure spraying tank are communicated with the circulating liquid inlet of the washing liquid circulating tank, the washing liquid inlets of the soaking tank and the first front brushing tank are communicated with the circulating liquid outlet of the washing liquid circulating tank, and the washing liquid inlets of the first high-pressure spraying tank, the second front brushing tank and the second high-pressure spraying tank are communicated with the filtering water outlet of the filtering water tank.

As one of the implementation modes, the cleaning liquid circulating tank comprises a circulating area and a filtering area which are mutually communicated, the circulating liquid inlet and the circulating liquid outlet are both arranged in the circulating area, the filtering area is connected with the filtering water inlet of the filtering water tank through a filtering pipeline, and a fine filtering mechanism is arranged on the filtering pipeline.

As one embodiment, a magnetic filter is disposed on the circulating liquid inlet pipe of the cleaning liquid circulating tank.

As one embodiment, the post-cleaning section includes at least one post-cleaning tank, a rinsing tank and a final-cleaning tank sequentially connected in the running direction of the strip.

As one of the embodiments, the rear cleaning section is further provided with a rinsing circulation tank, the cleaning liquid inlets of the rear cleaning tank and the rinsing tank are all communicated with the rinsing water outlet of the rinsing circulation tank, and the cleaning liquid outlets of the rear cleaning tank, the rinsing tank and the final cleaning tank are all communicated with the rinsing water inlet of the rinsing circulation tank.

As one embodiment, the dry degreasing section is provided with a laser degreasing device and/or a plasma degreasing device.

As one embodiment, the pretreatment section and the post-treatment section each comprise a brush trough, and brush rolls in at least part of the brush troughs adopt bristles with low surface energy.

The invention also provides a strip degreasing method which is implemented based on the combined strip degreasing system, and comprises the following steps:

s1, treating a strip through a pre-cleaning section, and drying the surface of the treated strip through a strip drying unit;

s2, the strip enters a dry oil removal section for treatment, and the residual oil film on the surface of the strip is removed or converted into a substance easy to clean;

s3, the strip enters a post-cleaning section for treatment, and the surface of the treated strip is dried by a strip drying unit so as to be produced in a post-process.

The invention has at least the following beneficial effects:

according to the invention, a combined degreasing process of a front cleaning section, a dry degreasing section and a rear cleaning section is adopted, so that the degreasing operation of the surface of the strip material can be efficiently and reliably carried out; based on the combined degreasing process, the cleaning liquid only adopts desalted water, namely only adopts a physical degreasing means, thereby being environment-friendly.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a combined strip degreasing system according to an embodiment of the present invention;

FIG. 2 is a schematic side view of an electromagnetic filter according to an embodiment of the present invention;

fig. 3 is a schematic top view of an electromagnetic filter according to an embodiment of the present invention;

fig. 4 is a schematic front view of an electromagnetic filter according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a system for treating iron sludge according to an embodiment of the present invention;

FIG. 6 is a top view of FIG. 5;

fig. 7 is a schematic structural diagram of an iron mud collecting box according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

As shown in fig. 1, an embodiment of the present invention provides a combined strip degreasing system, which includes a front cleaning section, a dry degreasing section 7, and a rear cleaning section sequentially connected along a strip running direction, where a strip drying unit 6 is respectively disposed at a strip outlet of the front cleaning section and a strip outlet of the rear cleaning section.

In the embodiment, the combined degreasing process of the front cleaning section, the dry degreasing section and the rear cleaning section is adopted, so that the degreasing operation of the surface of the strip material can be efficiently and reliably performed.

In one embodiment, as shown in fig. 1, the front cleaning section includes a pickling tank 1, a first high-pressure spraying tank 2, at least one section of front brushing tank, and a second high-pressure spraying tank 5, which are sequentially connected in the running direction of the strip.

Wherein, as shown in fig. 1, the immersion tank 1 is preferably a vertical tank, the inlet and outlet of the immersion tank 1 are respectively provided with a steering roller, the bottom of the immersion tank is provided with a sink roller, the strip sequentially winds the inlet steering roller, the sink roller and the outlet steering roller, and the running track of the strip in the immersion tank 1 is basically vertical. In one embodiment, the temperature of the cleaning liquid in the leaching tank 1 is 85 ℃; the cleaning liquid preferably enters from the lower part of the immersion tank 1 and overflows from the upper part.

Preferably, the leaching tank 1 adopts an ultrasonic leaching mode, and ultrasonic vibration plates are preferably distributed on two sides of the moving track of the strip; under the action of ultrasonic waves, the belt material is heated up rapidly, preferably to a temperature close to that of the cleaning liquid, so that the viscosity and the adhesive force of the grease on the surface of the belt material are greatly reduced, the grease is convenient to remove, and good conditions are created for subsequent degreasing.

The first high-pressure spray washing tank 2 is used for carrying out full-face washing on the strip by adopting high-pressure cleaning liquid, so that a considerable part of grease and iron powder on the surface of the strip can be rapidly removed. Preferably, the pressure of the high-pressure cleaning liquid is controlled to be 30-50 MPa, for example, about 40MPa, so that the flushing effect can be ensured. In the first high-pressure spray tank 2, there are support rolls, preferably one high-pressure spray beam at each support roll.

The second high-pressure spray washing tank 5 is used for washing the whole surface of the strip again by adopting high-pressure cleaning liquid, and can further remove the adhesive such as greasy dirt and iron powder on the surface of the strip by combining the brushing action of the front brushing tank and the high-pressure washing action. Preferably, the pressure of the high-pressure cleaning liquid is controlled to be 30-50 MPa, for example, about 40MPa, so that the flushing effect can be ensured. In the second high-pressure spray tank 5, there are support rolls, preferably one high-pressure spray beam at each support roll.

In one embodiment, the front brushing groove has two sections, including a first front brushing groove 3 and a second front brushing groove 4. Preferably, as shown in fig. 1, the first front brushing groove 3 is in open communication with the groove cavity of the first high-pressure spraying groove 2, for example, the first front brushing groove and the second front brushing groove share a groove body or the groove bodies of the first front brushing groove and the second front brushing groove are integrally formed; the second front brushing groove 4 is communicated with the groove cavity of the second high-pressure spraying groove 5 in an open way, for example, the second front brushing groove and the second high-pressure spraying groove share one groove body or the groove bodies of the second front brushing groove and the second high-pressure spraying groove are integrally formed, and the mode not only can improve the compactness of system arrangement, but also is convenient for controlling the cleaning liquid.

The first front brushing groove 3 and the second front brushing groove 4 are communicated through a throat channel, the throat channel is convenient for the strip to pass through, and the environment between the two front brushing grooves can be well isolated. Preferably, a wringing roller is provided at the outlet of the first front brushing tank 3.

In particular, as shown in fig. 1, the pickling tank 1, the first high-pressure spray tank 2 and the first front brushing tank 3 are in open communication, for example, a special-shaped cleaning tank is adopted, which includes a vertical tank body configured as the pickling tank 1 described above and a horizontal tank body in which high-pressure spray equipment and brushing equipment are arranged to configure the first high-pressure spray tank 2 and the first front brushing tank 3 described above. Based on the structure, the cleaning liquid in the first high-pressure spray washing tank 2 and the first front brushing tank 3 can automatically flow into the dipping tank 1, so that on one hand, the gradient utilization of the cleaning liquid can be realized, the consumption of the cleaning liquid is saved, the dipping tank 1 can always keep overflow liquid level, the dipping effect can be ensured, and the power energy consumption for supplying the cleaning liquid to the dipping tank 1 can be saved; on the other hand, it is possible to facilitate circulation control of the cleaning liquid, particularly when the cleaning liquid circulation tank 11 is shared by immersion cleaning, spray cleaning and brushing, and also to facilitate collection and cleaning of the cleaned sludge, for example, the sludge in the horizontal tank body can be mostly carried by the cleaning liquid into the immersion cleaning tank 1 for deposition; in particular, when the cleaning liquid in the horizontal tank body falls into the pickling tank 1, a certain turbulence effect can be caused in the pickling tank 1, and accordingly the cleaning effect on the strip steel is improved. In addition, the vertical groove body is in butt joint type open communication with the horizontal groove body, the passing of the belt materials is smoother and safer, the structural compactness of the cleaning groove is very high, and the occupied area of the field can be effectively saved.

In the front brushing tank, preferably, brushing and spray washing are alternately performed, whereby the removal effect and efficiency of oil and iron powder on the surface of the strip can be ensured, and accordingly, in the front brushing tank, the brush rolls and spray beams are alternately arranged in the running direction of the strip.

In one embodiment, as shown in fig. 1, the front cleaning section is further configured with a cleaning solution circulation tank 11 and a filtering water tank 12, the cleaning solution outlets of the immersion cleaning tank 1, the first high-pressure spray cleaning tank 2, each of the front cleaning tanks and the second high-pressure spray cleaning tank 5 are all communicated with the circulation solution inlet of the cleaning solution circulation tank 11, the cleaning solution inlets of the immersion cleaning tank 1 and the first front cleaning tank 3 are all communicated with the circulation solution outlet of the cleaning solution circulation tank 11, and the cleaning solution inlets of the first high-pressure spray cleaning tank 2, the second front cleaning tank 4 and the second high-pressure spray cleaning tank 5 are all communicated with the filtering water outlet of the filtering water tank 12.

In the embodiment, based on the combined degreasing process, the cleaning solution only needs to be desalted water, namely, the embodiment only adopts a physical degreasing means, so that the method is environment-friendly. Wherein, the filtering water tank 12 is provided with a water supplementing pipeline 18, and the water supplementing pipeline 18 is connected with a desalted water source.

Wherein, preferably, the magnetic filter 15 is disposed on the circulating liquid inlet pipe of the cleaning liquid circulating tank 11, so that the cleaning liquid flowing back in the cleaning tank can be filtered, impurities such as iron mud and the like in the cleaning liquid can be removed, the service life and cleaning effect of the cleaning liquid can be effectively prolonged, and the maintenance frequency of the cleaning liquid circulating tank 11, the spray beam and the like can be reduced.

Preferably, as shown in fig. 1, the leaching tank 1, the first high-pressure spray tank 2 and the first front brushing tank 3 share one circulating liquid inlet pipe, the second front brushing tank 4 and the second high-pressure spray tank 5 share one circulating liquid inlet pipe, and the two circulating liquid inlet pipes are respectively provided with a magnetic filter 15.

The circulation liquid inlet pipe of the cleaning liquid circulation tank 11 is preferably connected to the tank top, and the circulation liquid outlet is preferably provided at the lower portion of the cleaning liquid circulation tank 11.

In one embodiment, as shown in fig. 1, the cleaning solution circulation tank 11 includes a circulation zone 111 and a filtration zone 112 that are mutually communicated, the circulation solution inlet and the circulation solution outlet are both disposed in the circulation zone 111, the filtration zone 112 is connected with the filtration water inlet of the filtration water tank 12 through a filtration pipeline, and the fine filtration mechanism 16 is disposed on the filtration pipeline.

The cleaning liquid circulation tank 11 is partitioned, so that the cleaning liquid can be conveniently treated, and the cleanliness of the cleaning liquid flowing to the filtering water tank 12 can be improved. Preferably, as shown in fig. 1, the circulation area 111 and the filtration area 112 are separated by two partition boards, the first partition board is arranged at the junction of the circulation area 111 and the filtration area 112, the first partition board extends upwards from the tank bottom at the junction to a certain distance from the tank top, the second partition board extends downwards from the tank top of the circulation area 111 to the tank bottom close to the circulation area 111, the two partition boards are adjacent and are arranged at intervals, a baffling channel can be formed, and the cleaning liquid automatically flows into the filtration area 112 and simultaneously oil sludge can be conveniently deposited in the circulation area 111. Based on the structure, the difference of the inlet and outlet flow of the cleaning liquid circulating tank 11 caused by adding the filtering pipeline can be avoided, and the stability of the circulating flow of the cleaning liquid is ensured.

In one embodiment, the fine filtering mechanism 16 includes a first filtering device and a second filtering device, where the first filtering device adopts a super-oleophobic micro-filter, and in the super-oleophobic micro-filter, an outer surface of a micro-filtration membrane tube is covered with a super-oleophobic coating, and the super-oleophobic coating has characteristics of oleophobic property and low surface tension, so that the oil sludge adhered to the surface of the super-oleophobic coating is relatively easy to be removed, and the problems of membrane tube blockage failure and the like are not caused.

Further, the super-oleophobic micro-filter is provided with a regeneration mechanism, so that the service life of the super-oleophobic micro-filter can be prolonged, and the working reliability and the filtering effect of the super-oleophobic micro-filter can be improved. In one embodiment, the regeneration mechanism comprises a flush tube in communication with the lumen of the microfiltration membrane tube; and/or, the regeneration mechanism comprises a purging pipe which is communicated with the inner cavity of the shell of the super-oleophobic micro-filter and faces the outer wall of the micro-filtration membrane pipe. The outer surface of the micro-filtration membrane tube is covered with the super-oleophobic coating, and the micro-filtration membrane tube can be quickly regenerated by back flushing in the micro-filtration membrane tube and/or purging outside the membrane tube. Wherein the flushing pipe is connected with a flushing water source; the purge tube is connected to a source of purge gas, such as compressed air.

Further, the filter material outlet of the super oleophobic micro-filter is connected with an oil sludge squeezing device, so that deep dehydration of the oil sludge can be realized, and the dehydrated oil sludge is convenient for direct transportation and treatment.

The second filter device preferably employs a blocking membrane filter, and can further filter impurities such as iron mud. Preferably, the blocking membrane filter adopts an HK blocking membrane, which has extremely strong oil-repellent characteristic, when oil-containing cleaning liquid with certain pressure is required to permeate the HK blocking membrane, water molecules on the feeding side can be substituted and permeated with water molecules in the membrane, and oil-repellent dispersoids cannot be substituted with associated water in the membrane and can be selectively blocked. The oil blocking and removing process can be quantitatively designed, the oil removing precision is high, back flushing is not needed during the operation, the oil content of incoming water is not limited, the impact of large oil mass is resisted, and the water yield can be up to more than 99%. The waste oil blocked by the blocking membrane filter can be discharged to a collection container or a collection tank.

Through the fine filtering mechanism 16, most of oil stains and iron powder in the cleaning solution can be removed (in the embodiment, the removal rate can reach more than 95 percent), and the cleanliness of the cleaning solution in the water filtering tank 12 is ensured, so that the cleaning effect of related equipment and the use safety of the equipment are ensured.

Wherein, the circulating pump is arranged on the circulating liquid outlet pipe of the cleaning liquid circulating tank 11, the filtering water pump is arranged on the filtering pipeline, the circulating pump and/or the filtering water pump preferably adopts a variable frequency pump, and the dynamic balance of the liquid inlet amount and the liquid outlet amount of the cleaning liquid circulating tank 11 can be matched through the rotation speed adjustment of the pump.

The filter water tank 12 supplies clean cleaning liquid to the first high-pressure spray tank 2, the second front brush tank 4 and the second high-pressure spray tank 5, so that the working reliability of the first high-pressure spray tank 2, the second front brush tank 4 and the second high-pressure spray tank 5 can be ensured, the blocking probability of the high-pressure pump group 17 can be reduced, and the clean cleaning liquid can be adopted by the second front brush tank 4 and the second high-pressure spray tank 5 to further ensure the surface cleanliness of the strip.

Preferably, a wringer roller may be disposed at the outlet of the second high-pressure spray tank 5, and the surface dryness of the strip may be improved in cooperation with the strip drying unit 6 at the outlet side thereof. The above-described tape drying unit 6 includes, but is not limited to, the use of an air knife device.

Preferably, the filter water tank 12 and the cleaning solution circulating tank 11 are both provided with heaters, so that the cleaning solution can be heated and kept warm, and the heated cleaning solution can obtain better cleaning effect. Wherein, in the cleaning liquid circulation tank 11, a heater may be disposed only in the circulation zone 111.

In one embodiment, the dry oil removing section 7 is provided with a laser oil removing device and/or a plasma oil removing device, so that an oil film remained on the surface of the strip material can be removed; in the dry oil removing section 7, the oil film on the surface of the strip material can be removed or converted into a substance which is easy to remove by adopting a laser firing method with specific frequency or a plasma decomposition method, and trace oil film which is difficult to wash and brush by cleaning liquid can be easily removed.

In one embodiment, as shown in fig. 1, the post-cleaning stage includes at least one post-brush tank 8, a rinse tank 9, and a final spray tank 10 that are sequentially connected in the direction of travel of the strip.

The structure of the rear brushing groove 8 can refer to the structure of the front brushing groove, and will not be described herein. A section of the rear brushing tank 8 is preferably used, and a wringing roller is preferably arranged at the outlet of the rear brushing tank 8.

Preferably, as shown in fig. 1, the cavities of the rinsing tank 9 and the final spray tank 10 are in open communication, for example, the two tanks are integrally formed together.

The surface cleanliness of the outlet strip steel can be ensured by the cleaning of the rinsing tank 9 and the final spraying tank 10, and the surface of the strip steel has the minimum residue after being dried. In one embodiment, a plurality of sets of rinse nozzles are disposed within the rinse tank 9; one or more groups of final spray pipes are arranged in the final spray tank 10.

Further preferably, as shown in fig. 1, the post-washing section is further provided with a rinse cycle tank 13, the washing liquid inlets of the post-washing tank 8 and the rinsing tank 9 are all communicated with a rinse water outlet of the rinse cycle tank 13, and the washing liquid outlets of the post-washing tank 8, the rinsing tank 9 and the final-washing tank 10 are all communicated with a rinse water inlet of the rinse cycle tank 13.

The same type of cleaning liquid as the cleaning liquid in the cleaning liquid circulation tank 11 is preferably used for the cleaning liquid in the rinsing circulation tank 13, and for example, desalted water is used for all.

Preferably, as shown in fig. 1, the cleaning solution inlet of the final spray tank 10 is communicated with the filtered water outlet of the above-mentioned filtered water tank 12, that is, the cleaning solution is supplied to the final spray tank 10 through the filtered water tank 12, so that the surface cleanliness of the strip after the final spray can be ensured, and the strip can be used as the water supplement of the rinsing circulation tank 13.

In one embodiment, as shown in fig. 1, a partition plate is arranged in the rinsing circulation tank 13, and extends upwards from the tank bottom to a certain distance from the tank top, so that the rinsing circulation tank 13 is divided into a brushing liquid area and a rinsing liquid area which are communicated with each other; wherein, preferably, the brushing liquid inlet pipe and the brushing liquid outlet pipe of the rear brushing groove 8 are connected on the brushing liquid area, and the rinsing liquid inlet pipe and the rinsing liquid outlet pipe of the rinsing circulation tank 13 are connected on the rinsing liquid area. The structure can ensure the partition of the brushing liquid and the rinsing liquid to a large extent, thereby ensuring the brushing and rinsing effects; the jet flow rate in the rinsing tank 9 and the final-jet tank 10 is preferably larger than the jet flow rate in the rear rinsing tank 8, and the final-jet tank 10 is supplied with water from an external source, so that, in the rinsing liquid zone, in addition to the self-rinsing liquid circulation, the flow direction overflowing to the brushing liquid zone is formed, and the cascade utilization of the cleaning liquid can be formed.

Further preferably, as shown in fig. 1, the rinse cycle tank 13 is provided with a return pipe connected to the filtering section 112 of the washing liquid circulation tank 11, to effect circulation of the washing liquid of the post-washing stage. The water return pipe is preferably connected to the brushing liquid area, and the trapezoidal flow is realized in the rinsing circulation tank 13, so that the power can be saved.

Preferably, a heater is arranged in the rinsing circulation tank 13, so that the cleaning liquid can be heated and kept warm, and the heated cleaning liquid can obtain better cleaning effect.

Preferably, a wringer roller may be disposed at the outlet of the final spray tank 10, and in cooperation with the strip drying unit 6 at the outlet side thereof, the surface dryness of the strip may be improved. The web drying unit 6 includes, but is not limited to, an air knife device.

For the front brushing groove and the rear brushing groove 8, brush rolls in at least part of brushing grooves adopt brush hair with low surface energy, so that oil stains adhered to the brush hair are easy to fall off under the impact of water flow, and the cleaning effect is ensured.

Each tank body is provided with a mist discharge port and is connected with a mist discharge pipeline for discharging high-temperature mist generated in the degreasing process. In one embodiment, as shown in fig. 1, the above-mentioned strip degreasing system is further provided with a mist condenser 14, and each mist discharging pipe is connected to the mist condenser 14, so that the water vapor generated by the splashing and evaporation can be recovered to the maximum extent under the action of the circulating cooling water. Further preferably, a condensate outlet pipe of the mist condenser 14 is connected to the cleaning liquid circulation tank 11, and condensate is collected in the cleaning liquid circulation tank 11 for recycling.

Therefore, the strip degreasing system provided by the embodiment can realize complete recycling of the cleaning liquid, achieves the effect of near zero emission, and has remarkable energy-saving and consumption-reducing effects.

Example two

The present embodiment provides a strip degreasing method, which is implemented based on the combined strip degreasing system provided in the first embodiment, and includes:

s1, treating the strip material by a pre-cleaning section, and drying the surface of the treated strip material by a strip material drying unit 6;

s2, the strip enters a dry oil removal section 7 for treatment, and the residual oil film on the surface of the strip is removed or converted into a substance easy to clean;

s3, the strip enters a post-cleaning section for treatment, and the surface of the treated strip is dried by a strip drying unit 6 so as to be produced in a post-process.

Specific implementation steps are already described in the first embodiment, and are not repeated here.

Example III

The present embodiment provides an electromagnetic filter 100 that can be used in the first embodiment described above as the magnetic filter 15 therein.

As shown in fig. 2 to 4, the electromagnetic filter 100 comprises a filter tank 101, a filter disc 102 and an impurity collector 103, wherein the filter disc 102 comprises an annular bracket 1021, a plurality of electromagnetic chucks 1022 and an electric control unit for controlling the electromagnetic chucks 1022 to be powered off, each electromagnetic chuck 1022 is mounted on the annular bracket 1021 and is sequentially and annularly distributed along the circumferential direction of the annular bracket 1021, and the annular bracket 1021 is provided with a rotary driving mechanism 105 for driving the rotary driving mechanism to rotate; the ring-shaped holder 1021 is partially located in the filtering tank 101, and the impurity collector 103 is disposed outside the filtering tank 101 and includes an impurity removing portion for driving impurities away from the electromagnetic chuck 1022.

In one embodiment, the annular support 1021 includes an inner ring frame and an outer ring frame, which are connected by a plurality of spokes, each spoke correspondingly dividing an annular area between the inner ring frame and the outer ring frame into a plurality of suction cup mounting positions, each suction cup mounting position being provided with an electromagnetic suction cup 1022.

Wherein, optionally, as shown in fig. 2, the spokes are distributed along the radial direction of the annular support 1021, and the inner ring frame-spoke-outer ring frame connection is formed in a hub shape.

The electromagnetic chuck 1022 is preferably removably mounted to the annular support 1021, including but not limited to by screw attachment.

The surface of the electromagnetic chuck 1022 is preferably coplanar with the corresponding side surface of the annular bracket 1021, so that impurities on the electromagnetic chuck 1022 can be removed conveniently, and dirt can be prevented from being accumulated due to the fact that corners are formed between the electromagnetic chuck 1022 and the annular bracket 1021.

Preferably, the annular support 1021 is connected to the rotation driving mechanism 105 through a support rotation shaft 104, and the rotation driving mechanism 105 drives the support rotation shaft 104 to rotate, so as to drive the annular support 1021 and the electromagnetic chuck 1022 on the annular support 1021 to rotate.

In one embodiment, the rotary driving mechanism 105 adopts a structure of a motor and a transmission assembly, and the transmission assembly can adopt a mode of sprocket transmission, belt pulley transmission and the like; the motor is preferably a variable frequency motor, and the rotation speed of the annular bracket 1021 can be controlled.

Preferably, the electric control unit comprises a plurality of electric control cables and electric control modules, the electric control cables are connected with the electromagnetic chucks 1022 in the same number and in a one-to-one correspondence manner, and each electric control cable is electrically connected with the electric control module.

In one embodiment, the support shaft 104 is a hollow shaft, and each of the electric control cables is routed through the hollow cavity of the support shaft 104. The mode can facilitate the layout of the electric control cable, and has high safety and reliability. Preferably, a wiring hole is formed on the annular bracket 1021 (for example, the inner ring frame) so as to facilitate the electric control cable to enter the bracket rotating shaft 104; a routing channel is also provided in the electromagnetic chuck 1022 to connect the electrical control cable with the coil in the electromagnetic chuck 1022.

Preferably, the annular bracket 1021 is detachably mounted on the bracket rotation shaft 104. In one embodiment, the stent rotation shaft 104 is designed in segments, and the annular stent 1021 is clamped between two rotation shaft segments 1041 of the stent rotation shaft 104 (typically, the inner ring frame is clamped between two rotation shaft segments 1041 of the stent rotation shaft 104); optionally, a shoulder is machined on the rotating shaft segment 1041, two ends of the inner hole of the inner ring frame respectively adopt a stepped hole structure, the journal portion at the end of the rotating shaft segment 1041 is inserted into the large-diameter hole segment in the corresponding side stepped hole structure, and the shoulder portion of the rotating shaft segment 1041 is abutted with the corresponding side end face of the inner ring frame and fixed by screws.

Further, when the shaft segment 1041 is assembled with the inner ring frame, the electromagnetic chuck 1022 may be further clamped between the two, for example, the outer ring wall of the inner ring frame adopts a stepped shaft structure, a clamping groove is formed between the shaft shoulder of one shaft segment 1041 and the large diameter wall body of the stepped shaft type outer ring wall, and the corresponding side end of the electromagnetic chuck 1022 is clamped in the clamping groove. The mode can improve the stability and reliability of installation of the electromagnetic chuck 1022, and particularly when an electric control cable needs to enter the electromagnetic chuck 1022 through the support rotating shaft 104, the structure can ensure the alignment accuracy between the wiring hole on the annular support 1021 and the wiring channel in the electromagnetic chuck 1022, so that faults such as damage to the electric control cable are avoided.

In one embodiment, the electronic control module comprises a central controller and an electrically conductive slip ring, each electronic control cable is connected with a rotor part of the electrically conductive slip ring, and the central controller is connected with a stator part of the electrically conductive slip ring. The rotor portion of the conductive slip ring is preferably mounted on the bracket shaft 104. With this structure, the electromagnetic chucks 1022 can be rotated normally, and reliable control of the power supply and the power failure of each electromagnetic chuck 1022 can be ensured.

Such central controllers include, but are not limited to, PLC controllers.

When the annular bracket 1021 drives each electromagnetic chuck 1022 to rotate, part of the electromagnetic chucks 1022 are immersed into the filter tank 101 from outside the filter tank 101, and part of the electromagnetic chucks 1022 leave the filter tank 101 and swing upwards; for the electromagnetic chuck 1022 on the upper pendulum, ferromagnetic impurities are adsorbed on the surface of the electromagnetic chuck 1022, and the carried liquid and the liquid in the adsorbed impurities can leave the electromagnetic chuck 1022 under the action of gravity, so that the effect of gravity dehydration can be achieved, the water content of the impurities collected in the impurity collector 103 is low, the subsequent treatment of the impurities is convenient, and the loss of the liquid in the filter tank 101 can be reduced.

In one embodiment, as shown in fig. 3 and 4, the filter disc 102 further includes a water blocking ring 1023, the water blocking ring 1023 is coaxially installed on the support shaft 104 and abuts against the disc surface of each electromagnetic chuck 1022, an annular water blocking edge is formed on the outer annular wall of the water blocking ring 1023 in a protruding manner, and the annular water blocking edge and each electromagnetic chuck 1022 enclose to form a water blocking groove. By arranging the water retaining ring 1023, the liquid can be well guided, and the liquid is prevented from entering the bracket rotating shaft 104 and other places to influence the normal operation of the electric control unit.

Among them, the water blocking ring 1023 is preferably provided in two and is arranged on both sides of the ring-shaped supporter 1021.

Preferably, a sealing gasket is sandwiched between the water retaining ring 1023 and the electromagnetic chuck 1022, so as to improve the water retaining effect.

In the impurity collecting station, the method of scraping the impurities on the surface of the electromagnetic chuck 1022 can be adopted, and the method of flushing the surface of the electromagnetic chuck 1022 by high-pressure water or high-pressure air can be adopted.

In one embodiment, as shown in fig. 2-4, the impurity removing unit includes a scraper 1031, and the working end of the scraper 1031 contacts with the disk surface of the electromagnetic chuck 1022 at the impurity collecting position; the impurity collector 103 further includes an impurity collecting receptacle 1032, and the impurity collecting receptacle 1032 is engaged under the scraper 1031. The mode has low energy consumption and high working reliability.

Generally, since both side surfaces of the electromagnetic chuck 1022 can absorb foreign matters, it is preferable to provide the scraper 1031 and the foreign matter collecting groove 1032 on both sides of the annular bracket 1021, respectively; the interval between the working ends of the both side scrapers 1031 is preferably the same as the thickness of the electromagnetic chuck 1022.

Preferably, as shown in fig. 3 and 4, the above-described scraper 1031 is arranged obliquely, so that the scraped foreign substances can be easily dropped into the foreign substance collection groove 1032.

Alternatively, the working end of the above-mentioned scraper 1031 is a top end thereof, which is preferably parallel to the horizontal plane, that is, the contact line of the scraper 1031 with the electromagnetic chuck 1022 is parallel to the horizontal plane, which may facilitate the arrangement of the scraper 1031, the impurity collecting tank 1032, etc., and the collection of impurities.

Preferably, the scraper 1031 is a trough plate, and the length direction of the scraper 1031 is defined as the direction from the working end to the impurity collecting receptacle 1032, so that the two lateral ends of the scraper 1031 are respectively extended to form a wing plate, which can better restrain and guide the scraped impurities.

As a preferable solution of this embodiment, as shown in fig. 3 and fig. 4, the filter disc 102 has a plurality of groups, each of the annular holders 1021 is sequentially mounted on the same holder rotating shaft 104, and the holder rotating shaft 104 is connected to the rotation driving mechanism 105. Providing multiple sets of filter discs 102 can improve filtration efficiency and filtration efficiency.

As shown in fig. 3, one impurity collection trough 1032 may be shared between two adjacent filter trays 102.

Preferably, as shown in fig. 3, a plurality of partitions are provided in the filter tank 101, each partition dividing the filter tank 101 into a plurality of liquid storage tanks 1011, and preferably each liquid storage tank 1011 is provided with a filter disc 102; the number of the filter discs 102 and the liquid storage tanks 1011 is preferably the same and arranged in one-to-one correspondence.

In one embodiment, upstream wastewater may be simultaneously introduced into each of the reservoirs 1011.

In other embodiments, the tanks 1011 may be serially connected in sequence, the upstream sewage enters the first tank 1011 first, and the sewage circulates between the upstream tank 1011 and the downstream tank 1011 in an overflow manner, so that the sewage can be treated in a pipeline manner, continuous treatment can be realized, and the treatment effect and efficiency can be ensured. As shown in fig. 3, in the first-stage liquid storage tank 1011, the filter disc 102 is preferably arranged close to the sewage inlet, so that ferromagnetic impurities in the sewage can be captured at the first time, and the electromagnetic filtering effect is improved; in the tail tank 1011, the filter disc 102 is preferably disposed near the filtrate outlet, so that the cleanliness of the discharged filtrate can be improved.

In particular, based on the segmented design of the bracket spindle 104 described above, the installation and placement of each filter tray 102 may be facilitated; the number of the filter discs 102 can be increased or decreased as required, so that the flexibility is very high; and the maintenance of the equipment can be facilitated, for example, the disassembly and assembly of the filter disc 102 at the corresponding liquid storage tank 1011 can be carried out, and the filter treatment in other liquid storage tanks 1011 is not affected.

The method for using the electromagnetic filter 100 includes:

The electromagnetic chucks 1022 are driven to rotate by the annular bracket 1021, so that the electromagnetic chucks 1022 can circularly move among the working position, the water removal position and the impurity removal position,

in the working position, the electromagnetic chuck 1022 is powered and at least partially immersed in the filter tank 101 to adsorb ferromagnetic impurities in the filter tank 101;

in the dehydration position, the electromagnetic chuck 1022 is kept in an electrified state;

in the impurity removal position, the electromagnetic chuck 1022 is de-energized, and impurities are driven off from the electromagnetic chuck 1022 by the impurity removal unit and collected.

Example IV

This embodiment further optimizes the first embodiment described above. Specifically, the cleaning solution circulation tank 11 is provided with an iron mud treatment subsystem for online cleaning of iron mud impurities in the cleaning solution circulation tank 11, improving the running stability and reliability of the system and the cleaning quality of steel, and reducing the shutdown dredging time and frequency.

Preferably, the iron sludge treatment subsystem is coupled to the recirculation zone 111.

As shown in fig. 5 and 6, the iron sludge treatment subsystem comprises an intermediate medium circulation mechanism and an iron sludge recovery mechanism, wherein the intermediate medium circulation mechanism comprises a plurality of intermediate mediums 330 capable of extracting iron sludge at the bottom of a cleaning solution circulation tank 11, and a medium conveying unit 331, a medium transferring unit 332 and a medium reflux unit 333 which are sequentially connected, the medium conveying unit 331 is communicated with an intermediate medium outlet of the cleaning solution circulation tank 11, and the medium reflux unit 333 is communicated with an intermediate medium inlet of the cleaning solution circulation tank 11; the iron sludge recycling mechanism includes a flushing unit disposed above the medium relay unit 332 and an iron sludge collection tank 321 disposed below the medium relay unit 332.

In one embodiment, the intermediate medium 330 includes a steel ball for holding the iron mud, so that the iron mud at the bottom of the container can be conveniently carried out. For the iron mud at the bottom of the container, the iron mud is wrapped by steel balls which are overlapped and flowed, and the iron mud is taken out of the cleaning solution circulating tank 11 through the medium conveying unit 331; when the surface of the medium steel ball is designed to have a certain roughness, the iron mud wrapping effect can be improved, and in one embodiment, the surface roughness Ra of the medium steel ball is more than or equal to 0.8 mu m, and is more preferably controlled to be less than or equal to 12 mu m.

In one embodiment, as shown in fig. 5, a slope is disposed at the bottom of the cleaning solution circulation tank 11, the slope slopes from the intermediate medium inlet to the intermediate medium outlet, so that the intermediate medium 330 can circulate in the container conveniently, for example, the medium steel balls can run from the intermediate medium inlet to the intermediate medium outlet by means of gravity, and the medium steel balls at the high place can squeeze and drive the medium steel balls at the low place and the iron mud on the slope, so that the bottom of the container is ensured to move all the time based on the circulation of the medium steel balls, the iron mud accumulation phenomenon can be reduced, the intervention of power equipment can be saved, and meanwhile, the slope is also beneficial to the deposition of the iron mud to the intermediate medium outlet so that the intermediate medium 330 can bring the iron mud out conveniently.

In one embodiment, the medium conveying unit 331 described above employs a screw pump or a screw conveyor, which may be disposed obliquely or horizontally depending on the relative positional relationship between the intermediate medium outlet and the medium relay unit 332.

In one embodiment, as shown in fig. 5 and 6, the medium relay unit 332 employs a chain conveyor unit, for example, a drag chain conveyor or a chain conveyor. Accordingly, the media relay unit 332 includes a top link layer 3321 and a bottom link layer 3322.

Wherein the link plate gap of the chain conveyor unit is smaller than the size of the intermediate medium 330, e.g. smaller than the diameter of the medium steel balls.

The medium conveying unit 331 is connected to the upper chain layer 3321, for example, a medium output port of the medium conveying unit 331 is located right above the upper chain layer 3321, and the medium conveying unit 331 can convey the medium 330 onto the upper chain layer 3321; optionally, a hopper is disposed above the upper chain layer 3321, through which the intermediate medium 330 outputted from the medium conveying unit 331 is received and transferred onto the upper chain layer 3321, and it is possible to avoid a situation in which the intermediate medium 330 is ejected out of the upper chain layer 3321 due to an excessively large drop distance.

Wherein the medium return unit 333 is arranged at the outlet side of the chain conveyor unit. Alternatively, the above-described medium return unit 333 employs a conveying roller table for conveying the cleaned intermediate medium 330 back to the cleaning liquid circulation tank 11.

The flushing unit is used for flushing the intermediate medium 330 on the medium transferring unit 332, so that the separation of the iron mud and the intermediate medium 330 can be realized. In one embodiment, as shown in fig. 6, the flushing unit includes a flushing pipe 351, at least one set of spraying structures may be disposed at the bottom of the flushing pipe 351, and when there are a plurality of sets of spraying structures, the spraying structures are sequentially disposed along the conveying direction of the intermediate medium 330; each set of spray structures includes at least one nozzle, and when there are a plurality of nozzles in the spray structures, the nozzles in the spray structures are preferably arranged in sequence along the width direction of the medium relay unit 332.

Further, as shown in fig. 6, the above-mentioned rinsing unit further includes a rinsing liquid supply pipe 352, and the rinsing liquid supply pipe 352 is connected to the rinsing pipe 351 for supplying rinsing liquid. Preferably, the surface water of the cleaning liquid circulation tank 11 is used as the cleaning liquid, and accordingly, the cleaning liquid supply pipe 352 is connected to the upper portion of the cleaning liquid circulation tank 11.

The rinse liquid may exit through both sides of the media relay unit 332, and/or the media relay unit 332 may be a hollow-out type conveying device, such as may exit through a flight gap of the chain type conveying unit. In one embodiment, as shown in fig. 5 and 7, the iron sludge recycling mechanism further includes a drainage unit 322, the drainage unit 322 is disposed between the upper chain layer 3321 and the lower chain layer 3322 of the medium relay unit 332, a top inlet of the drainage unit 322 is located directly below the flushing unit, and a bottom outlet of the drainage unit 322 is located directly above the iron sludge collection tank 321. Based on the design, the flushing liquid can be reliably drained into the iron mud collecting box 321, so that the field environment is cleaner; at the same time, the flushing water carrying the iron sludge is prevented from polluting the lower chain layer 3322, so that the working reliability of the medium transfer unit 332 is correspondingly improved, and the maintenance frequency of the medium transfer unit is reduced.

Preferably, as shown in fig. 5 and 7, the drainage unit 322 has an inverted Y-shaped structure, and forms a drainage inlet pipe and two drainage outlet pipes; the two drainage outlet pipes can ensure the drainage efficiency and effect of flushing liquid on one hand, and on the other hand, the arrangement of the lower chain layer 3322 is also convenient, for example, the lower chain layer 3322 is positioned between the two drainage outlet pipes.

Wherein the upper strand layer 3321 may be disposed in the drainage inlet tube so that the intermediate medium 330 and the iron sludge splashed by the high-pressure jet can be captured well.

Preferably, as shown in fig. 5 and 7, the drainage unit 322 is integrally connected to the iron mud collection tank 321, for example, an outer frame 3221 of the drainage unit 322 having the inverted Y-shaped structure is integrally formed with the iron mud collection tank 321 to form a top-closed tank, and an inverted V-shaped mud guard 3222 is provided in the tank to form an inner frame of the drainage unit 322.

In one embodiment, a protective screen 323 is further disposed around the winding layer 3321 of the medium relay unit 332, and a protective area of the protective screen 323 covers at least a flushing area of the winding layer 3321. By providing the protection net 323, the high-pressure jet stream can be prevented from ejecting the intermediate medium 330 out of the medium relay unit 332.

The protection net 323 can perform side protection, optionally, the protection net 323 includes two-sided side wall net plates 3231, and the two-sided side wall net plates 3231 are separately arranged at two sides of the conveying channel of the medium transfer unit 332; the side screen 3231 is preferably not movable with the media relay unit 332, for example, it is mounted by a screen bracket, and for the above-described arrangement with the drainage unit 322, the side screen 3231 may be mounted on the outer frame 3221 of the drainage unit 322.

And/or, the protection net 323 may perform upper protection, and optionally, the protection net 323 includes a top net plate 3232, and the top net plate 3232 is disposed above the medium relay unit 332; the top mesh plate 3232 is preferably not movable with the medium relay unit 332, and the installation manner of the top mesh plate 3231 can be used as a reference.

Further optimizing the above-mentioned iron sludge treatment subsystem, as shown in fig. 5 and 6, the iron sludge recycling mechanism further comprises a filtering unit, and the iron sludge collecting tank 321 is provided with a washing liquid recycling pipe connected to the filtering unit.

Optionally, the filtrate from the filtration unit may be reused as flushing fluid, for example, the filtrate outlet pipe of the filtration unit may be connected to a flushing fluid reservoir to which the flushing fluid supply pipe 352 is also connected. When the rinse liquid adopts the surface water of the rinse liquid circulation tank 11, the filtrate generated by the filtration unit may flow back into the rinse liquid circulation tank 11, and correspondingly, the filtrate outlet pipe of the filtration unit is connected with the rinse liquid circulation tank 11.

Wherein, the iron mud collecting tank 321 can adopt overflow mode to control the direction of the flushing liquid, and the flushing liquid recycling pipe is connected at the overflow liquid level of the iron mud collecting tank 321. Heavier impurities are deposited at the bottom of the iron sludge collection bin 321 and may be cleaned periodically or aperiodically.

In one embodiment, the filtering unit comprises electromagnetic filtering equipment for removing ferromagnetic impurities in the flushing liquid, and the ferromagnetic impurities suspended in the flushing liquid can be reliably adsorbed and removed; the electromagnetic filter device is preferably an electromagnetic filter 100 provided in the third embodiment described above.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (10)

1. A modular strip degreasing system, comprising: the device comprises a front cleaning section, a dry oil removing section and a rear cleaning section which are sequentially connected along the running direction of the strip, wherein a strip drying unit is respectively arranged at the outlet of the strip of the front cleaning section and the outlet of the strip of the rear cleaning section.

2. The modular strip degreasing system of claim 1, wherein: the front cleaning section comprises a leaching tank, a first high-pressure spraying tank, at least one section of front brushing tank and a second high-pressure spraying tank which are sequentially connected along the running direction of the strip.

3. The modular strip degreasing system of claim 2, wherein: the front cleaning section is also provided with a cleaning liquid circulating tank and a filtering water tank, and the front brushing groove is provided with two sections; the washing liquid outlet of the soaking tank, the first high-pressure spraying tank, the first front brushing tank and the second high-pressure spraying tank are communicated with the circulating liquid inlet of the washing liquid circulating tank, the washing liquid inlets of the soaking tank and the first front brushing tank are communicated with the circulating liquid outlet of the washing liquid circulating tank, and the washing liquid inlets of the first high-pressure spraying tank, the second front brushing tank and the second high-pressure spraying tank are communicated with the filtering water outlet of the filtering water tank.

4. A modular strip degreasing system as in claim 3, wherein: the washing liquid circulation tank includes the circulation district and the filtration district of intercommunication each other, circulation liquid entry with circulation liquid export all is located the circulation district, the filtration district through the filtration pipeline with the filtration water inlet connection of filtration water tank, in the last fine filtration mechanism that has arranged of filtration pipeline.

5. A modular strip degreasing system as in claim 3, wherein: a magnetic filter is arranged on a circulating liquid inlet pipe of the cleaning liquid circulating tank.

6. The modular strip degreasing system of claim 1, wherein: the rear cleaning section comprises at least one section of rear brushing groove, a rinsing groove and a final spraying groove which are sequentially connected along the running direction of the strip.

7. The modular strip degreasing system of claim 6, wherein: the back washing section is also provided with a rinsing circulation tank, the back washing tank and the cleaning liquid inlet of the rinsing tank are communicated with the rinsing water outlet of the rinsing circulation tank, and the cleaning liquid outlets of the back washing tank, the rinsing tank and the final spraying tank are communicated with the rinsing water inlet of the rinsing circulation tank.

8. The modular strip degreasing system of claim 1, wherein: the dry oil removing section is provided with a laser oil removing device and/or a plasma oil removing device.

9. The modular strip degreasing system of claim 1, wherein: the pretreatment section and the post-treatment section both comprise a brushing groove, and brush rolls in at least part of the brushing groove adopt brush hair with low surface energy.

10. A strip degreasing method, carried out on the basis of a combined strip degreasing system according to any one of claims 1 to 9, comprising:

S1, treating a strip through a pre-cleaning section, and drying the surface of the treated strip through a strip drying unit;

s2, the strip enters a dry oil removal section for treatment, and the residual oil film on the surface of the strip is removed or converted into a substance easy to clean;

s3, the strip enters a post-cleaning section for treatment, and the surface of the treated strip is dried by a strip drying unit so as to be produced in a post-process.