CN212559709U - Efficient oil filtering system for degreasing fluid of stainless steel cold rolling line - Google Patents

Abstract

The utility model discloses a high-efficient oil strain system of stainless steel cold rolling line degreasing fluid, including paper tape filter, degreasing fluid circulating device, ceramic membrane filter, oil water separator and cleaning unit, paper tape filter, degreasing fluid circulating device and ceramic membrane filter connect gradually through the degreasing fluid filter tube, and ceramic membrane filter output side is equipped with clean liquid output tube, still is connected with the degreasing fluid circulating pipe between ceramic membrane filter's raffinate exit end and degreasing fluid circulating device, and degreasing fluid circulating device passes through two oil water separation pipelines and oil water separator cyclic connection, and cleaning unit's output all communicates through the input side of scavenge pipe with ceramic membrane filter, and ceramic membrane filter's raffinate exit end and output side all communicate with the blow off pipe through the washing liquid connecting pipe. The utility model discloses can carry out filtration treatment to the degreasing fluid who uses the back oiliness in producing the line to degreasing fluid after the filtration can purify, and can reuse.

Description

Efficient oil filtering system for degreasing fluid of stainless steel cold rolling line

Technical Field

The utility model relates to a supporting degreasing cycle system equipment field of stainless steel cold rolling production line especially relates to a high-efficient oil filtration system of stainless steel cold rolling line degreasing fluid.

Background

The production line for directly rolling, annealing and pickling the stainless steel is matched with a degreasing circulation system for cleaning the oil content on the surface of the strip steel in order to prevent the surface of the strip steel from generating oil spots and influencing the surface quality of the strip steel after the strip steel is annealed, wherein the oil content on the surface of the strip steel is high after the stainless steel is rolled. The cleaning medium of the degreasing circulation system is degreasing fluid, when the degreasing fluid is used for cleaning the oil-containing surface of the strip steel, rolling oil on the surface of the strip steel is emulsified and dissolved in the degreasing fluid in the cleaning process to cause the oil-containing condition in the degreasing fluid, the cleaning effect is reduced along with the increase of the oil content in the degreasing fluid, when the oil content in the degreasing fluid exceeds 300ppm, the rolling oil needs to be discharged and treated, otherwise, the cleaning quality of the surface of the strip steel is influenced, the surface of the strip steel is dirtied to cause quality problems, and the large discharge of the degreasing fluid causes problems of increased production cost, increased wastewater treatment capacity and the like.

Disclosure of Invention

An object of the utility model is to provide a high-efficient oil strain system of stainless steel cold rolling line degreasing fluid.

Realize the utility model discloses the technical scheme of purpose is: a high-efficiency oil filtering system for degreasing fluid of a stainless steel cold rolling line comprises a paper tape filter, a degreasing fluid circulating device, a ceramic membrane filter, an oil-water separator and a cleaning unit, wherein the paper tape filter, the degreasing fluid circulating device and the ceramic membrane filter are sequentially connected through a degreasing fluid filtering pipe, a power pump is installed on the degreasing fluid filtering pipe between the degreasing fluid circulating device and the ceramic membrane filter, a cleaning fluid output pipe is arranged at the output side of the ceramic membrane filter, a degreasing fluid circulating pipe is also connected between the residual fluid outlet end of the ceramic membrane filter and the degreasing fluid circulating device, the degreasing fluid circulating device is circularly connected with the oil-water separator through two oil-water separating pipelines, a lifting pump is installed on the oil-water separating pipe connected with the inlet end side of the oil-water separator, the bottom end of the oil-water separator is connected with a drain pipe, and the cleaning unit comprises a pickling fluid storage tank, an alkaline, the output ends of the pickling solution storage tank, the alkaline washing solution storage tank and the washing solution storage tank are communicated with the input side of the ceramic membrane filter through cleaning pipes, and the residual solution outlet end and the output side of the ceramic membrane filter are communicated with a drain pipe through cleaning solution connecting pipes.

Furthermore, the number of the ceramic membrane filters is a plurality of groups, the residual liquid outlet ends of the ceramic membrane filters are circularly communicated with the degreasing fluid circulating device, the output sides of the ceramic membrane filters are connected with the purified fluid output pipe, the input sides of the ceramic membrane filters are communicated with the pickling fluid storage tank, the alkaline washing fluid storage tank and the washing fluid storage tank, and the residual liquid outlet ends and the output sides of the ceramic membrane filters are communicated with the drain pipe. The ceramic membrane filters arranged in parallel in a plurality of groups of pipelines simultaneously filter the degreasing fluid output from the degreasing fluid circulating device, so that the filtering capacity of the degreasing fluid in unit time can be improved.

Furthermore, each group of ceramic membrane filters comprises a plurality of ceramic membrane filter monomers, and the ceramic membrane filter monomers in each group of ceramic membrane filters are connected in series on the same pipeline. This arrangement also increases the filtration capacity of the spent meal per unit time.

Furthermore, the cleaning pipe is close to the ceramic membrane filter section and is connected with a degreasing fluid filter pipe between the power pump and the degreasing fluid circulating device. By the arrangement, the power for the degreasing liquid to flow into the ceramic membrane filter from the degreasing liquid circulating device during filtration and the power for the cleaning liquid to flow into the ceramic membrane filter from the cleaning unit during cleaning can be provided by the same group of power pumps, so that the arrangement of the other power pumps for providing power for the flow of the cleaning liquid is avoided, and the use of equipment is reduced.

Furthermore, the cleaning liquid connecting pipes respectively connected with the residual liquid outlet end and the output side of the ceramic membrane filter are also respectively communicated with the pickling liquid storage tank through a pickling liquid return pipe, the cleaning liquid connecting pipes respectively connected with the residual liquid outlet end and the output side of the ceramic membrane filter are also respectively communicated with the alkaline washing liquid storage tank through an alkaline washing liquid return pipe, and control valves are respectively arranged on the pickling liquid return pipe, the alkaline washing liquid return pipe, and the cleaning liquid connecting pipes behind the pickling liquid return pipe and the alkaline washing liquid return pipe. The pickling solution in the pickling solution storage tank and the alkaline washing solution in the alkaline washing solution storage tank are used for cleaning the ceramic membrane filter, the cleaning effect of the pickling solution and the alkaline washing solution is better, the pickling solution and the alkaline washing solution can be circulated and utilized in the pickling solution storage tank and the alkaline washing solution storage tank along the pickling solution return pipe and the alkaline washing solution return pipe through the control of each control valve on the cleaning solution connecting pipe, the pickling solution return pipe and the alkaline washing solution return pipe, and the use ratio of the pickling solution and the alkaline washing solution is improved and the cost is reduced.

The utility model discloses stainless steel cold rolling line degreasing fluid's high-efficient oil strain system can carry out filtration treatment to the degreasing fluid who uses the back oiliness in producing the line to degreasing fluid after the filtration can purify, and can reuse. In the degreasing fluid filtering process, on one hand, iron powder and impurities in the degreasing fluid are removed in advance by using a paper tape filter, so that the blockage and abrasion of each device caused in the degreasing process are avoided, and the degreasing fluid circulating pipe connected between the residual fluid outlet end of the ceramic membrane filter and the degreasing fluid circulating device realizes the circulation and the efficient filtration of the degreasing fluid; on the other hand, the oil-water separator regularly carries out oil-water separation on accumulated oil in the degreasing fluid circulating device, most of the accumulated oil in the degreasing fluid circulating process is quickly and massively removed, the ceramic membrane filter is prevented from being quickly blocked, meanwhile, cleaning liquid in the cleaning unit can be regularly discharged to clean dirt in the ceramic membrane filter, the flux of the ceramic membrane filter is ensured, and the whole degreasing system is enabled to operate more efficiently.

Drawings

FIG. 1 is a schematic structural diagram of the high-efficiency oil filtering system for degreasing fluid in the stainless steel cold rolling line of the present invention, in which arrows

Indicates the flow direction of the degreasing fluid, arrow

Indicating the flow of the wash solution.

Detailed Description

The following detailed description of the embodiments of the high-efficiency oil filtering system for degreasing fluid in a stainless steel cold rolling line according to the present invention is provided with the following drawings:

as shown in figure 1, the high-efficiency oil filtering system for the degreasing fluid of the stainless steel cold rolling line comprises a paper tape filter 1, a degreasing fluid circulating device 2, a ceramic membrane filter 3, an oil-water separator 4 and a cleaning unit, wherein the paper tape filter 1, the degreasing fluid circulating device 2 and the ceramic membrane filter 3 are sequentially connected through a degreasing fluid filtering pipe 10, a power pump 6 is installed on the degreasing fluid filtering pipe 10 between the degreasing fluid circulating device 2 and the ceramic membrane filter 3, a purified fluid output pipe 20 is arranged on the output side of the ceramic membrane filter 3, a degreasing fluid circulating pipe 30 is also connected between a residual fluid outlet end 31 of the ceramic membrane filter 3 and the degreasing fluid circulating device 2, the degreasing fluid circulating device 2 is circularly connected with the oil-water separator 4 through two oil-water separating pipelines 40, a lifting pump 7 is installed on the oil-water separating pipe 40 connected with the inlet end side of the oil-water separator 4, and a drain pipe 50 is connected with the bottom end of the oil, the cleaning unit comprises a pickling solution storage tank 51, an alkaline washing solution storage tank 52 and a washing solution storage tank 53, the output ends of the pickling solution storage tank 51, the alkaline washing solution storage tank 52 and the washing solution storage tank 53 are communicated with the input side of the ceramic membrane filter 3 through a cleaning pipe 60, and the residual solution outlet end 31 and the output side of the ceramic membrane filter 3 are communicated with the drain pipe 50 through a cleaning solution connecting pipe 70.

The utility model discloses stainless steel cold rolling line degreasing fluid's high-efficient oil strain system, come from producing the line and treat filterable degreasing fluid and send into paper tape filter 1, by paper tape filter 1 clear away treat a small amount of iron powder and impurity in the filterable degreasing fluid, the degreasing fluid of having clear away iron powder and impurity flows into in degreasing fluid circulating device 2 along degreasing fluid filter tube 10, then under power pump 6's effect, get into ceramic membrane filter 3 along degreasing fluid filter tube 10, after 3 filtration of ceramic membrane filter, the degreasing fluid that can purify is exported by clean liquid output tube 20, it then gets back to degreasing fluid circulating device 2 again by degreasing fluid circulating pipe 30 to remain in the ceramic membrane filter 3, with loop filter. The utility model discloses high-efficient oil strain system of stainless steel cold rolling line degreasing fluid, in the filtering process of degreasing fluid, 2 continuous feed liquors, the play liquid of degreasing fluid circulating device.

The utility model discloses a high-efficiency oil filtering system of degreasing fluid of a stainless steel cold rolling line, wherein a paper tape filter 1 is the existing equipment; the degreasing fluid circulating device 2 can be of a box body or a tank structure, and the structure of the degreasing fluid circulating device is also of an existing conventional structure. The structure of the paper tape filter 1 and the degreasing fluid circulating device 2 is not described in much detail in the present invention.

The utility model discloses high-efficient oil strain system of stainless steel cold rolling line degreasing fluid, ceramic membrane filter 3's core component are inorganic ceramic membrane, and inorganic ceramic membrane filter fineness reaches 5nm-1.2um, and the ceramic membrane of different filter fineness can cut off molecular weight from 10000 mangle 1000000 molecular weight's material. Since the ceramic membrane filter 3 is an existing device, the present invention does not give much explanation about its structure.

The utility model discloses stainless steel cold rolling line degrease liquid's high-efficient oil strain system, along with the not continuous filtration of degrease liquid, 3 face on the ceramic membrane filter are contaminated, and the flux descends gradually, and when the flux was less than a definite value, the requirement was usually gone into to ceramic membrane filter 3 and is washd. The ceramic membrane filter 3 is cleaned by the process of acid cleaning, alkali cleaning and water cleaning in sequence, namely, acid cleaning solution is continuously fed into the ceramic membrane filter 3 along the cleaning pipe 60 through an acid cleaning solution storage tank 51, after the ceramic membrane filter is cleaned for a period of time, alkali cleaning solution is continuously fed into the ceramic membrane filter 3 along the cleaning pipe 60 through an alkali cleaning solution storage tank 52, and after the ceramic membrane filter is cleaned for a period of time, water is fed into the ceramic membrane filter 3 along the cleaning pipe 60 through a water cleaning solution storage tank 53 for cleaning. The pickling solution in the pickling solution storage tank 51 is usually nitric acid, and the alkaline solution in the alkaline solution storage tank 52 is usually sodium hydroxide.

The utility model discloses high-efficient oil strain system of stainless steel cold rolling line degreasing fluid, degreasing fluid in the degreasing fluid circulating device 2 is behind the continuous loop filter many times, grease and fatlute that are separated by filtration system are constantly enriched in degreasing fluid circulating device 2, concentrate to behind the certain concentration, periodic ration is promoted by elevator pump 7 and is carried the oil water separator 4 in the separation of standing, after the separation of standing, the degreasing fluid of oil water separator 4 bottom sends back to degreasing fluid circulating device 2 through water oil separating pipeline 40, the thick oil on oil water separator 4 upper strata then sends back degreasing fluid circulating device 2 back in at the bottom degreasing fluid, discharge the pit automatically through blow off pipe 50, admit into waste water treatment station system.

The high-efficiency oil filtering system for the degreasing fluid of the stainless steel cold rolling line of the utility model is characterized in that the oil-water separator 4 is internally provided with a steam disc heater and a mechanical oil skimmer, when the oil-water separator 4 separates oil from water in the oil-water separator, the steam disc heater can heat the oil and water in the oil-water separator 4, and the oil and water can be rapidly separated if the oil and water are heated to 90 ℃; the mechanical oil skimmer can send the concentrated oil on the upper layer of the oil-water separator 4 into the drain pipe 50 and discharge the concentrated oil into the pit through the drain pipe 50. The utility model discloses, oil water separator 4 is existing equipment, its concrete structure the utility model discloses in no longer do too much explanation.

The utility model discloses stainless steel cold rolling line degreasing fluid's high-efficient oil strain system can carry out filtration treatment to the degreasing fluid who uses the back oiliness in producing the line to degreasing fluid after the filtration can purify, and can reuse. In the filtering process of the degreasing fluid, on one hand, iron powder and impurities in the degreasing fluid are removed in advance by using the paper tape filter 1, so that the blockage and abrasion of each device caused in the degreasing process are avoided, and the degreasing fluid circulating pipe 30 connected between the residual fluid outlet end 31 of the ceramic membrane filter 3 and the degreasing fluid circulating device 2 realizes the circulation and the high-efficiency filtration of the degreasing fluid; on the other hand, the oil-water separator 4 regularly performs oil-water separation on the accumulated oil in the degreasing fluid circulating device 2, most of the accumulated oil in the degreasing fluid circulating process is quickly and massively removed, the ceramic membrane filter 3 is prevented from being quickly blocked, meanwhile, cleaning liquid in the cleaning unit can be regularly discharged to clean dirt in the ceramic membrane filter 3, the flux of the ceramic membrane filter 3 is ensured, and the whole degreasing system is enabled to operate more efficiently.

The utility model discloses stainless steel cold rolling line degreasing fluid's high-efficient oil strain system, one set of continuous has been formed, complete degreasing fluid filters deoiling system, its high efficiency filter to degreasing fluid, make degreasing fluid can repeat, recycle, greatly reduced degreasing fluid's emission, this factory is spent about 30m year in degreasing fluid discharge volume every day before high-efficient oil strain system commits, high-efficient oil strain system commits about 2m year in the back degreasing fluid discharge volume every day, reduce waste water discharge volume 800m year every month, degreasing agent commits the cost and reduces 60%, the cleaning quality on oily belted steel surface has been stabilized simultaneously.

The utility model discloses stainless steel cold rolling line degreasing fluid's high-efficient oil strain system, preferably, ceramic membrane filter 3's quantity is a plurality of groups, a plurality of groups ceramic membrane filter 3's raffinate exit end 31 all with degreasing fluid circulating device 2 circulation intercommunication, clean liquid output tube 20 is all connected to a plurality of groups ceramic membrane filter 3 delivery side, a plurality of groups ceramic membrane filter 3 input side still all with pickling solution storage tank 51, alkali wash storage tank 52 and rinsing liquid storage tank 53 intercommunication, a plurality of groups ceramic membrane filter 3's raffinate exit end 31 and delivery side all communicate with blow off pipe 50. The ceramic membrane filters 3 arranged in parallel in a plurality of groups of pipelines simultaneously filter the degreasing fluid output from the degreasing fluid circulating device 2, so that the filtering capacity of the degreasing fluid in unit time can be improved.

The utility model discloses stainless steel cold rolling line degreasing fluid's high-efficient oil strain system, preferably, include a plurality of ceramic membrane filter monomer 32 in every ceramic membrane filter 3 of group, a plurality of ceramic membrane filter monomer 32 establish ties on same pipeline in every ceramic membrane filter 3 of group. This arrangement also increases the filtration capacity of the spent meal per unit time.

The utility model discloses stainless steel cold rolling line degreasing fluid's high-efficient oil strain system, preferably, scavenge pipe 60 is close to 3 sections of ceramic membrane filter and is connected with power pump 6 and degreasing fluid filter tube 10 between 2 of degreasing fluid circulating device. By the arrangement, the power for the degreasing liquid to flow into the ceramic membrane filter 3 from the degreasing liquid circulating device 2 during filtration and the power for the cleaning liquid to flow into the ceramic membrane filter 3 from the cleaning unit during cleaning can be provided by the same group of power pumps 6, so that the arrangement of other power pumps for providing power for the flow of the cleaning liquid is avoided, and the use of equipment is reduced.

The utility model discloses stainless steel cold rolling line degreasing fluid's high-efficient oil filtration system, preferably, the washing liquid connecting pipe 70 that the residual liquid exit end 31 and the output side of ceramic membrane filter 3 are connected respectively still returns liquid pipe 80 and pickle tank 51 intercommunication through the pickle respectively, the residual liquid exit end 31 and the washing liquid connecting pipe 70 that the output side is connected respectively of ceramic membrane filter 3 still return liquid pipe 90 and alkali wash tank 52 intercommunication through the alkali wash respectively, the pickle returns liquid pipe 80, the alkali wash returns liquid pipe 90 and the pickle returns liquid pipe 80 and the alkali wash returns and all installs control valve 8 on the washing liquid connecting pipe 70 at liquid pipe 90 rear. The cleaning of the ceramic membrane filter 3 by the pickling solution in the pickling solution storage tank 51 and the alkaline washing solution in the alkaline washing solution storage tank 52 is started, the cleaning effects of the pickling solution and the alkaline washing solution are good, the pickling solution and the alkaline washing solution can flow into the pickling solution storage tank 51 and the alkaline washing solution storage tank 52 along the pickling solution return pipe 80 and the alkaline washing solution return pipe 90 for cyclic utilization through control of the control valves 8 on the cleaning solution connecting pipe 70, the pickling solution return pipe 80 and the alkaline washing solution return pipe 90, for example, the pickling solution and the alkaline washing solution are sequentially and circularly cleaned for 30 minutes, the utilization rates of the pickling solution and the alkaline washing solution are improved, and the cost is reduced.

The utility model discloses a high-efficiency oil filtering system of degreasing fluid of a stainless steel cold rolling line, wherein the input side of a ceramic membrane filter 3 is a liquid inlet end which points to the ceramic membrane filter 3 and feeds liquid such as degreasing fluid and cleaning fluid; the output side of the ceramic membrane filter 3 is the liquid outlet end of liquid with higher purity, such as degreasing liquid and cleaning liquid, after being filtered by the ceramic membrane filter 3; the raffinate outlet port 31 of the ceramic membrane filter 3 is the outlet port for future and filtered or unfiltered liquids in the ceramic membrane filter 3.

The utility model discloses stainless steel cold rolling line degreasing fluid's high-efficient oil strain system can realize automated control management by PLC control system.

The utility model discloses right the utility model belongs to the technical field of the ordinary skilled person, do not deviating from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (5)

1. The utility model provides a high-efficient oil strain system of stainless steel cold rolling line degreasing fluid which characterized in that: the device comprises a paper tape filter, a degreasing fluid circulating device, a ceramic membrane filter, an oil-water separator and a cleaning unit, wherein the paper tape filter, the degreasing fluid circulating device and the ceramic membrane filter are sequentially connected through a degreasing fluid filtering pipe, a power pump is installed on the degreasing fluid filtering pipe between the degreasing fluid circulating device and the ceramic membrane filter, a clean fluid output pipe is arranged on the output side of the ceramic membrane filter, a degreasing fluid circulating pipe is also connected between the residual fluid outlet end of the ceramic membrane filter and the degreasing fluid circulating device, the degreasing fluid circulating device is circularly connected with the oil-water separator through two oil-water separation pipelines, a lifting pump is installed on the oil-water separation pipe connected with the inlet end side of the oil-water separator, the bottom end of the oil-water separator is connected with a drain pipe, the cleaning unit comprises a pickling solution storage tank, an alkali wash solution storage tank and a wash solution storage tank, the output ends of the pickling solution storage tank, the alkali solution, the residual liquid outlet end and the output side of the ceramic membrane filter are both communicated with a drain pipe through a cleaning liquid connecting pipe.

2. The efficient oil filtering system for the degreasing fluid of the stainless steel cold rolling line according to claim 1, is characterized in that: the quantity of ceramic membrane filters is a plurality of groups, the residual liquid outlet ends of a plurality of groups of ceramic membrane filters are circularly communicated with the degreasing fluid circulating device, the output sides of a plurality of groups of ceramic membrane filters are connected with the purified fluid output pipe, the input sides of a plurality of groups of ceramic membrane filters are also communicated with the pickling solution storage tank, the alkaline washing solution storage tank and the washing solution storage tank, and the residual liquid outlet ends and the output sides of a plurality of groups of ceramic membrane filters are communicated with the blow-off pipe.

3. The efficient oil filtering system for the degreasing fluid of the stainless steel cold rolling line according to claim 1, is characterized in that: each group of ceramic membrane filters comprises a plurality of ceramic membrane filter monomers, and the ceramic membrane filter monomers in each group of ceramic membrane filters are connected in series on the same pipeline.

4. The efficient oil filtering system for the degreasing fluid of the stainless steel cold rolling line according to claim 1, is characterized in that: the cleaning pipe is close to the ceramic membrane filter section and is connected with a degreasing fluid filter pipe between the power pump and the degreasing fluid circulating device.

5. The efficient oil filtering system for the degreasing fluid of the stainless steel cold rolling line according to claim 1, is characterized in that: the cleaning liquid connecting pipes respectively connected with the residual liquid outlet end and the output side of the ceramic membrane filter are also respectively communicated with a pickling liquid storage tank through a pickling liquid return pipe, the cleaning liquid connecting pipes respectively connected with the residual liquid outlet end and the output side of the ceramic membrane filter are also respectively communicated with an alkaline washing liquid storage tank through an alkaline washing liquid return pipe, and control valves are respectively arranged on the pickling liquid return pipe, the alkaline washing liquid return pipe, and the cleaning liquid connecting pipes behind the pickling liquid return pipe and the alkaline washing liquid return pipe.

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