The dynamic back purge system of the waterpower of filter and back-flushing method
Technical field
The present invention relates to the efficient pressure filtering equipment of oil-polluted water, concrete is back purge system and the back-flushing method of quartz filter.
Background technology
Quartz filter is the device that removes oily in the oil-polluted water and suspension take oleophobic quartz sand as filter medium.Because it has that filtering layer becomes that bed is closely knit, retaining power is strong, filtering accuracy is high and the advantage such as easy water backwashing, from the sixties in last century by the oil field extensive use.The quartz sand filter media layer is after after a while operation in the filter, and void among particles and surface thereof are saturated by oil and suspension institute, for recovering its strainability, needs regularly quartz sand filter media to be carried out backwash regeneration.Because the quartz sand particle surface holds back the oil mass difference, cause the density variation of top layer " quartz sand particle-oil " complex larger, to hold back oil mass large on the filtering layer top layer comparatively speaking, and complex density is little, and quartz sand dilation in top layer is high during backwash.Therefore the conventional quartz sand filter top of field use is provided with the sieve basket, and the excessive quartz sand filter media particle of dilation runs off with backwashing water during with the obstruction backwash.Yet the quartz sand particle that is retained in sieve basket surface can wrap stifled sieve basket; its area of passage is reduced; back washing strength reduces, backwash builds the pressure; cause the interior quartz sand filter media of filter to can not get effective cleaning; filter reduces suspension and oil removing rate, thereby greatly affects the quality of oil field reinjection water.Therefore traditional back-flushing method only relies on merely that collision friction power is peeled off oil and quartz sand particle between the shearing force of backwash current and particle, can cause filter bed dilation heterogeneity, top layer quartz sand particle expansion rate relatively large, stop up top sieve basket and media regeneration efficient lower.
Summary of the invention
The back purge system that the purpose of this invention is to provide a kind of filter, this device can be when backwash to filter in quartz sand filter media effectively clean, avoid the generation of stopping up, building the pressure phenomenon; Another object of the present invention provides the back-flushing method of the filter that uses this back purge system.
For achieving the above object, the technical solution adopted in the present invention is: the dynamic back purge system of the waterpower of filter, comprising that cylindrical shell, compound waterpower runner and helical-ribbon type are scraped washes agitating device, the sidewall of described cylindrical shell arranges the backwash delivery port of filter, the upper cover plate center of cylindrical shell is fixedly connected with rotating shaft by bearing, the lower port of cylindrical shell is welded and fixed blank flange, and cylindrical shell is connected with the upper port flange of filter by this blank flange; The center of blank flange arranges centre bore, also is provided with the some circular holes equidistant with centre bore around the centre bore, and these circular holes are along circumferentially uniform; On the lower surface of blank flange welding and the coaxial main screen casing of centre bore and with circular hole coaxial divide screen casing, the lower port rigid bearing mechanism of main screen casing, rotating shaft cooperates with this Bearning mechanism, the outside of main screen casing arranges helical-ribbon type and scrapes and wash agitating device, helical-ribbon type is scraped and is washed agitating device and comprise and be coiled in the outer ribbon of main screen casing, the lower end of ribbon is fixed in the rotating shaft, and the inboard spiral limit of ribbon contacts with the outer wall of main screen casing; At the upper surface of blank flange welding conical cylinder, the welding column cylinder suitable for reading of conical cylinder, rotating shaft is concentric with the column cylinder, and the rotating shaft key is connected with compound waterpower runner, and compound waterpower runner is positioned at the column cylinder.
Described compound waterpower runner, be composed in series by the first waterpower runner and the second waterpower runner, be that 6 ~ 10, the angle of attack are the airfoil fan of α along circumferential evenly fixed qty on the wheel hub outer wall of the first waterpower runner, be that 4 ~ 8, the angle of attack are the airfoil fan of β along circumferential evenly fixed qty on the wheel hub outer wall of the second waterpower runner, angle of attack alpha-beta=10 ° ~ 30 ° wherein.
The ribbon of preferred main screen casing outside coiling is two, and the hand of spiral of these two ribbons is opposite; The smoothness that rotates in order to ensure ribbon, the fixing reinforcement in the side of ribbon.
Use the back-flushing method of the filter of the dynamic back purge system of above-mentioned waterpower to be:
When 1, backwashing water was flowed through the column cylinder from bottom to top, then compound waterpower runner rotation drove the helical-ribbon type stirring by rotating shaft and scrapes the cleaning device rotation;
2, helical-ribbon type stirs when scraping the cleaning device rotation, and the ribbon inner side edge is swiped to main screen casing outer wall, removes the filtering material particle that main screen casing outer wall adheres to; Simultaneously backwashing water is mixed, make backwashing water carry out waterpower to a minute screen casing outer wall and clean, remove the filtering material particle that minute screen casing outer wall adheres to; In addition, the effect of mixing makes the filtering material particle of caking broken, and oil is further separated with filtrate, and the greasy dirt after the separation reaches a minute screen casing discharge filter with backwashing water through main screen casing.
Beneficial effect of the present invention:
1) compound waterpower runner effectively reclaims backwashing water residue mechanical energy, the drive ribbon is scraped and is washed the agitating device rotation, and the backwash oil-water mixture is carried out strong stirring, and screen casing is carried out the waterpower cleaning action, effectively prevent the obstruction of screen casing, and effectively reduce the dead angle of filter;
2) ribbon is scraped and is washed in the agitating device ribbon inner side edge and constantly scrape and wash main screen casing surface, prevents that effectively oil and quartz sand particle from stopping up main screen pipe opening;
3) leakage fluid dram of the dynamic back purge system of waterpower is positioned at the peak of tank body, is conducive to get rid of the tank deck oil slick.
Description of drawings
Fig. 1 is the structural representation with the filter of the dynamic back purge system of waterpower of the present invention.
Fig. 2 is the structural representation of the blank flange in apparatus of the present invention.
Fig. 3 is the A-A view among Fig. 2.
Fig. 4 is that helical-ribbon type is scraped the structural representation of washing agitating device.
Fig. 5 is the structural representation of compound waterpower runner.
Fig. 6 is that the first waterpower runner is along wheel hub circumferentially deploying schematic diagram.
The specific embodiment
The present invention is further illustrated below in conjunction with accompanying drawing and specific embodiment:
As shown in Figure 1: the dynamic back purge system of the waterpower of filter, comprising that cylindrical shell 4-0, compound waterpower runner 4-5 and helical-ribbon type are scraped washes agitating device 4-9, the sidewall of described cylindrical shell 4-0 arranges the backwash delivery port 3 of filter, the upper cover plate 4-1 center of cylindrical shell 4-0 is fixedly connected with rotating shaft 4-3 by bearing 4-2, the lower port of cylindrical shell 4-0 is welded and fixed blank flange 4-7, and cylindrical shell 4-0 is connected with upper port 2 flanges of filter by this blank flange 4-7; As shown in Figure 2: the center of blank flange 4-7 arranges centre bore 4-7-1, also is provided with the some circular hole 4-7-2s equidistant with centre bore around the centre bore 4-7-1, and these circular holes 4-7-2 is along circumferentially uniform; As shown in Figure 3: on the lower surface of blank flange 4-7 welding and the coaxial main screen casing 4-8 of centre bore 4-7-1 and with circular hole 4-7-2 coaxial divide screen casing 4-10; The lower port rigid bearing 4-11 of mechanism of main screen casing 4-8, rotating shaft 4-3 cooperates with this Bearning mechanism 4-11, the outside of main screen casing 4-8 arranges helical-ribbon type and scrapes and wash agitating device 4-9, as shown in Figure 4: described helical-ribbon type is scraped and is washed agitating device 4-9, comprise and be coiled in the outer ribbon 4-9-1 of main screen casing 4-8, preferred ribbon 4-9-1 is two, the hand of spiral of these two ribbon 4-9-1 is opposite, smoothness in order to ensure ribbon 4-9-1 rotation, the fixing reinforcement 4-9-2 in the side of ribbon 4-9-1, the lower end of ribbon 4-9-1 is fixed on the rotating shaft 4-3, and the inboard spiral limit of ribbon 4-9-1 contacts with the outer wall of main screen casing 4-8; At the upper surface of blank flange 4-7 welding conical cylinder 4-6, the welding column cylinder 4-4 suitable for reading of conical cylinder 4-6, rotating shaft 4-3 is concentric with column cylinder 4-4, and rotating shaft 4-3 key is connected with compound waterpower runner 4-5, and compound waterpower runner 4-5 is positioned at column cylinder 4-4.
By Fig. 5 in conjunction with shown in Figure 6: described compound waterpower runner 4-5, be composed in series by the first waterpower runner 4-5-1 and the second waterpower runner 4-5-2, be that 6 ~ 10, the angle of attack are the airfoil fan 4-5-4 of α along circumferential evenly fixed qty on the wheel hub 4-5-3 outer wall of the first waterpower runner 4-5-1, be that 4 ~ 8, the angle of attack are the airfoil fan 4-5-4 of β along circumferential evenly fixed qty on the wheel hub 4-5-3 outer wall of the second waterpower runner 4-5-2, angle of attack alpha-beta=10 ° ~ 30 ° wherein.
The specific works principle that the filter of back purge system of the present invention is installed is:
Backwashing water in water distribution system 5 enters tank body 1 and by uniform distribution to whole cross section, quartz sand filter media expands under the effect of reverse high-velocity flow, under the effect of flow shear and quartz sand particle frictional force, the oil that major part is wrapped in filter material surface peels off and with flowing on the current direction, forms the backwash oil-water mixture.Part oil and quartz sand particle are unstripped, and it increases the volume density less, also can with suspending on the current direction, can be mingled with like this quartz sand particle of surface parcel oil in the backwash oil-water mixture.The backwash oil-water mixture is collected through top master's screen casing and minute screen casing, and the quartz sand particle that is mingled with in the mixed liquor is trapped in its surface by screen casing and is on the increase, and the screen casing discharge area is reduced.The backwash oil-water mixture enter column cylinder 4-4 to compound waterpower runner 4-5 work done after, flow to outside the tank body 1 by delivery port 3 through the overflow of column cylinder 4-4 upper limb.Simultaneously compound waterpower runner 4-5 absorbs the remaining power generation radial thrust of backwash oil-water mixture, the stirring of drive helical-ribbon type is scraped cleaning device 4-9 and is constantly rotated, ribbon 4-9-1 inboard produces the effect of washing of scraping to main screen casing 4-8, the quartz sand of avoiding main screen casing 4-8 outer surface to hold back stops, prevent that quartz sand particle from stopping up main screen casing 4-8, the in addition effect that mixes of ribbon 4-9-1 formation, a minute screen casing 4-10 is constantly carried out waterpower to be cleaned, prevent that quartz sand particle from stopping up a minute screen casing 4-10, keep the area of passage of main screen casing 4-8 and minute screen casing 4-10 constant, effectively avoid the obstruction of screen casing, prevented the build the pressure generation of phenomenon of backwash.It is broken that the effect that mixes simultaneously also is conducive to the filtering material particle that lumps, realizes the effective separation of greasy dirt and filtrate.By the design of the dynamic back purge system of waterpower, formed a kind of formation of new Filter Back Washing method of unpowered input.