CN203694673U - Walnut shell filter with filtering material cleaned in extracorporeal circulating way - Google Patents

Abstract

The utility model discloses a walnut shell filter with filtering material cleaned in an extracorporeal circulating way. The walnut shell filter comprises a filtering tank, and a cleaning device and a circulating pump arranged outside, wherein a sewage inlet pipe, a cleaning material outlet, a cleaning circulating material return opening and a filtering water outlet pipe are arranged on the filtering tank; a filtering bed is arranged inside the filtering tank; a filtering hole is formed in the filtering bed, and a walnut shell filtering material layer piles on the filtering bed; the cleaning circulating material return opening formed in the filtering tank is formed in the bottom of the filtering material layer and tangent to the inner wall of the filtering tank; the cleaning device comprises an external pipe and an internal pipe mounted in the external pipe in an inserting manner; a material inlet and a material outlet are formed in the external pipe; the material inlet is connected on the circulating pump through a closed pipe; the circulating pump is connected with the cleaning material outlet formed in the filtering tank through a cleaning material outlet pipe; the material outlet is connected to the cleaning circulating material return opening formed in the filtering tank through a cleaning circulating material return pipe; a sewage filtering hole and a sewage draining opening are formed in the internal pipe; a cleaning sewage draining pipe stretching out of the external pipe is connected to the sewage draining opening formed in the internal pipe. According to the utility model, the walnut shell filter has the characteristics of stability, reliability, low operating cost, thorough cleaning and renewability, high filtering efficiency and precision, no material running and the like.

Description

The walnut shell filter of filtrate is cleaned in extracorporal circulatory system

Technical field

The utility model relates to walnut shell filter, and specifically the walnut shell filter of filtrate is cleaned in a kind of extracorporal circulatory system.

Background technology

Walnut shell filter be the walnut shell of the characteristics such as, high adsorption capacity large taking surface area, hydrophilic not oleophylic as the filter plant of filter medium, be widely applied in the place of the oil-polluted waters such as oil field.Walnut shell filter is after long-term use, and filter medium-walnut shell can adsorb, tackle the impurity such as a large amount of greasy dirts, and these greasy dirt impurity can make filter medium mutually stick caking, and then filter medium loses absorption, filtering function.Can normally move in order to ensure walnut shell filter, the walnut shell filter media processes mode that loses absorption, filtering function is had to two kinds: the first is directly replaced with virgin material, which needs the walnut shell virgin material through special processing processing in a large number, produce a large amount of walnut shell waste materials simultaneously, not only can significantly increase the operating cost of filter, and a large amount of walnut shell waste disposal difficulty that produce are large, processing cost is high, extremely impracticable; It two is filter medium to be carried out to cleaning and regeneration recycle, and this is also at present the most frequently used, by the filter medium that loses absorption, filtering function is carried out to cleaning and regeneration, makes that it recovers to adsorb, filtering function, and then enters and in filter, carry out cycling and reutilization.

The existing walnut shell filter to filter medium cleaning and regeneration has a variety of, and wherein immediate with the application is that the disclosed name of Chinese patent literature is called " extracorporeal circulating walnut-shell cleaning filter " (publication number: CN 2630230; Open day: on August 4th, 2004) technology.This technology is mainly made up of with the backwash recycle-water filtrate separator, the filtrate recover that are arranged on filtering tank outside the filtering tank of inside inversion filtrate mixer, this technology becomes flexible by mechanical agitation the filter medium that sticks caking, and then formation eddy current enters backwash recycle-water filtrate separator, in this process, between each filter medium, mutually collide, rub, under the flushing action of water liquid, the object that realizes desorption, recovery filtering function, the filter medium of having regenerated is sent in filtering tank and is recycled by filtrate recover.Though it can carry out cleaning and regeneration and recycle losing the filter medium of absorption, filtering function, there is following major defect because of structural design reason in it:

1. mechanical agitation makes the filter medium that sticks caking form eddy current, necessarily require mixer High Rotation Speed, the blade of High Rotation Speed has formed sharp sword, and then a part of filter medium in eddy current is beaten, cut pulverizing, the filter medium of pulverizing has not only lost its absorption, the value of filtering, can only go out of use, filter need to be filled up the normal operation of virgin material to ensure, increase operating cost, and the broken shape filter medium going out of use can (be backwash recycle-water filtrate separator and filtrate recover to the cleaning device of filtering tank outside, comprise each tube connector simultaneously) result in blockage, the fault such as build the pressure, frequency of maintenance is high, have a strong impact on filter efficiency and increased operating cost, poor reliability,

2. mixer reliable High Rotation Speed in filtering tank, the blade of inevitable requirement mixer in filtering tank, limit among a small circle in form flow field, be blade must and the inwall of filtering tank between form safe distance, otherwise the blade of High Rotation Speed will produce collision with filtering tank, lead to substantial equipment security incident, this prerequisite has determined the eddy current flow field scope in filtering tank, can form the filter medium that only has blade coverage and safe distance inner edge scope in flow field, the filter medium of safe distance outer rim has formed dead angle, though sticking the filter medium of caking, dead angle place can under the drive of eddy current, become flexible, but be difficult to screw out filtering tank and realize cleaning and regeneration, this is by the filter medium cleaning and regeneration completely causing in filtering tank, the filter medium recycling has comprised the absorption that loses that is not cleaned regeneration, the filter medium of filtering function, this has affected the strainability of filter greatly, also the cleaning and regeneration frequency of filter medium will be accelerated simultaneously, and then meeting further reduces the filter efficiency of filter, increase operating cost,

3. the filter medium that sticks caking is stirred and becomes flexible and screw out filtering tank by the mixer of High Rotation Speed, it is the caking that relatively relaxes of the filter medium based in filtering tank (being that filter medium pollutes in lighter situation) and realizing, if relatively dead (being in the situation of filter medium heavy contamination) of the caking of the filter medium in filtering tank, not only mixer is difficult to be become flexible and screw out filtering tank, and the operation of the mixer of High Rotation Speed is obstructed, cause the faults such as the excessive motor of current of electric damages, blade comes off, shaft distortion, increase frequency of maintenance.In recent years along with the application and development of oil gas field " polymer flooding " oil recovery technique, polymer concentration in oil extraction-generated waste water and sewage treatment process product (as precipitation of calcium carbonate, calcium dirt etc.) sharply increase, these greasy dirt impurity and filter medium-walnut shell have stronger adhesive force, filter medium in filtering tank has adsorbed after these greasy dirt impurity easily relatively dead caking, will make in this case aforesaid walnut shell filter lose using value;

Cleaning device (being backwash recycle-water filtrate separator and filtrate recover) need at least be equipped with two pumps could normal running job, not only power consumption is large, increases operating cost, and Operation and Maintenance difficulty all can increase accordingly, poor practicability;

5. in order to make mechanical agitation can form reliable eddy current, screw out as much as possible all filter mediums in filtering tank, the filter material layer thickness that requires filter medium to form can not be too thick (conventionally within 1.2 m), this will make the filtering accuracy of filter relatively low, and then causes the water quality of filtrate relatively low.

Summary of the invention

The purpose of this utility model is: for the defect of above-mentioned prior art, a kind of simple in structure, easy to operate, frequency of maintenance is provided and operating cost is low, applied widely, cleaning and regeneration thoroughly, without the walnut shell filter that runs high, the reliable and practical extracorporal circulatory system of material (being pulverized discarded phenomenon without filter medium), filter efficiency and filtering accuracy and clean filtrate.

The technical solution adopted in the utility model is: the walnut shell filter of filtrate is cleaned in a kind of extracorporal circulatory system, comprise filter tank and the cleaning device, the circulating pump that are arranged on filter tank outside, described filter tank is provided with sewage inlet pipe, cleans and take out material mouth, clean cycle feedback outlet and drainage discharge pipe, in filter tank, be provided with filter bed, filter bed is provided with filter opening and piles up and have walnut shell filtering material layer on filter bed, clean cycle feedback outlet on described filter tank is in the bottom of filter material layer, and tangent with the inwall of filter tank; Described cleaning device is mainly made up of outer tube and sealing plug-in mounting inner tube within the outer tube, outer tube is provided with charging aperture and discharging opening, the charging aperture of outer tube is connected on circulating pump by cross over pipe, circulating pump is taken out material mouthful by cleaning material-pumping tube and the cleaning on filter tank and is connected, the discharging opening of outer tube is connected to by clean cycle feed back pipe on the clean cycle feedback outlet of filter tank, described inner tube is provided with sewage filter opening and sewage draining exit, is connected with the cleaning blow-off pipe that extends outer tube on the sewage draining exit of inner tube.

Further, described filter tank is provided with and cleans tailing feedback outlet, and this cleaning tailing feedback outlet is in the top of filter material layer; On described clean cycle feed back pipe, lead to the cleaning tailing feed back pipe communicating with the cleaning tailing feedback outlet on filter tank, on the clean cycle feed back pipe that cleans tailing feed back pipe and cleaning tailing feed back pipe downstream, be respectively equipped with stop valve.

Further, the filter material layer thickness on described filter bed is 1.5～2m.

Further, described filter bed is upper and lower two-layer isolated sandwich, between interlayer, be provided with polylith support member, the top layer of filter bed is provided with some filter openings, the bottom of filter bed communicates with the drainage discharge pipe extending in filter tank, drainage discharge pipe is provided with stop valve, and mezzanine space forms drainage collection region.

Further, the cleaning on described filter tank is taken out material mouthful and is drawn from sewage inlet pipe, cleans to take out and expects that the sewage inlet pipe of mouthful upstream is provided with stop valve; Described and the cleaning on filter tank are taken out the cleaning material-pumping tube that material mouth is connected and are provided with stop valve.

Further, the outer tube lower end of described cleaning device is provided with the end plate of the annular clearance forming between sealing blocking outer tube and inner tube, cleans blow-off pipe and extends into end plate and be tightly connected with the sewage draining exit of inner tube, cleans blow-off pipe and is provided with stop valve.

Further, described cleaning device adopts stainless steel to make.

Further, described circulating pump is placed on pump seat, and the height of pump seat is corresponding with filter tank height.

Further, described cross over pipe is provided with evacuation port.

Further, described filter tank is provided with oil gas outlet, is connected with oil gas discharge pipe on oil gas outlet.

The beneficial effects of the utility model are: any stirring apparatus is not set in filter tank, only the clean cycle feedback outlet on filter tank (being the mouth that the filter medium of cleaning and regeneration enters filter tank) position is carried out rationally, design reliably, utilization enters the press water of this clean cycle feedback outlet by the filter material layer fluidisation spin-up on filter bed, and then take filter tank out of and carry out cleaning and regeneration, without any dead angle, all disadvantages that apparatus brings are avoided stirring completely, have simple in structure, easy to operate, reliable, frequency of maintenance is low, operating cost is low, (no matter being that high pollution oily water or low contaminated oil sewage can be suitable for) applied widely, cleaning and regeneration is thorough, without running material (being pulverized discarded phenomenon without filter medium), filter efficiency is high, the feature such as practical, on this basis, the filter material layer thickness in filter tank can be increased to 1.5～2m, the filtering accuracy of filter is significantly promoted, and then improve the water quality of filtrate, in addition, cleaning device simple in structure only drives with a circulating pump, not only install and easy to operate, power consumption is low, and can effectively, up hill and dale filter medium be separated to discharge with cleaning sullage, the filter medium of guaranteeing to enter filter tank is clean clean, and then further improve the filtering accuracy of filter, the cleaning and regeneration frequency of filter medium is low, be conducive to further improve filter filter efficiency, reduce operating cost.

Brief description of the drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Fig. 1 is a kind of structural representation of the present utility model.

Fig. 2 is a kind of structural representation of cleaning device in Fig. 1.

Code name implication in figure: 1-sewage inlet pipe; 2-oil gas discharge pipe; 3-filter tank; 4-filter material layer; 5-filter bed; 6-drainage discharge pipe; 7-pump seat; 8-cleaning blow-off pipe; 9-clean cycle feed back pipe; 10-cleaning device; 11-circulating pump; 12-cleaning tailing feed back pipe; 13-cleaning material-pumping tube; 14-evacuation port; 15-charging aperture; 16-outer tube; 17-inner tube; 18-sewage draining exit; 19-end plate; 20-discharging opening; 21-bearing; 22-cross over pipe.

Detailed description of the invention

Referring to Fig. 1 and Fig. 2: the utility model comprises filter tank 3 and is arranged on cleaning device 10, the circulating pump 11 of filter tank 3 outsides.

Wherein, filter tank 3 supports on the ground by bearing 21.Be provided with sewage inlet port at the top of filter tank 3, clean and take out material mouthful (overlapping with sewage inlet port in the present embodiment), oil gas outlet, cleaning tailing feedback outlet and manhole etc.; On sewage inlet port, be sealedly connected with sewage inlet pipe 1, this sewage inlet pipe 1 is connected with greasy dirt water source, on sewage inlet pipe 1, is provided with stop valve; Due in the present embodiment clean take out material mouthful with sewage inlet port overlapping, thereby lead in the stop valve downstream of sewage inlet pipe 1 clean take out material mouthful, clean take out material mouthful on be connected with clean material-pumping tube 13, clean material-pumping tube 13 be provided with stop valve; On oil gas outlet, be sealedly connected with oil gas discharge pipe 2, the oil gas being mingled with for emitting oily water; Clean on tailing feedback outlet and be sealedly connected with and clean tailing feed back pipe 12, on cleaning tailing feed back pipe 12, be provided with stop valve.The bottom (comprising bottom) of filter tank 3 is provided with clean cycle feedback outlet, drainage outlet and manhole etc.; Clean cycle feedback outlet correspondence is at the top of the interior filter bed 5 of filter tank 3 and the bottom of filter material layer 4, and require clean cycle feedback outlet to form tangent with the inwall of filter tank 3, on clean cycle feedback outlet, be sealedly connected with clean cycle feed back pipe 9, on clean cycle feed back pipe 9, be provided with stop valve, the clean cycle feed back pipe 9 of this stop valve upstream communicates with cleaning tailing feed back pipe 12; Drainage outlet is located at the bottom of filter tank 3, stretches into for drainage discharge pipe 6, and drainage discharge pipe 6 stretches in filter tank 3 by this mouth, and communicates with the filter bed 5 in filter tank 3, and drainage discharge pipe 6 is provided with stop valve.The bottom of filter tank 3 inside is provided with filter bed 5, this filter bed 5 is upper and lower two-layer isolated sandwich, between interlayer, be provided with polylith support member, the top layer of filter bed 5 is provided with some capillary filter openings, and the bottom of filter bed 5 communicates with the drainage discharge pipe 6 extending in filter tank 3, can consider the bottom-layer design of filter bed 5 to become the pyramidal structure of slightly sinking, mezzanine space forms drainage collection region, like this under the prerequisite of guaranteeing its strainability, effective guarantee its structural strength, long service life; On filter bed 5, pile up that to have thickness range be such as 1.6m, 1.9m or 2m etc. of 1.5～2m() walnut shell filtering material layer 4, the height of filter material layer 4 is lower than the height of all mouthfuls of filter tank 3 tops (be sewage inlet port, clean and take out material mouth, oil gas outlet, cleaning tailing feedback outlet and manhole etc.).

The inner tube 17 that cleaning device 10 is mainly inserted in outer tube 16 by outer tube 16 and the sealing of stainless steel forms.The top of outer tube 16 is cone-shaped, and cone-shaped upper end is charging aperture 15, and this charging aperture 15 is tightly connected with circulating pump 11 by the cross over pipe 22 of stainless steel, and cross over pipe 22 is provided with evacuation port 14; The body of outer tube 16 is cylindric, the bottom of outer tube 16 is the uncovered structure of cylinder, top position, bottom (near bottom) at outer tube 16 is provided with discharging opening 20, and this discharging opening 20 loops back and expects that the clean cycle feed back pipe 9 that mouth is connected is tightly connected with cleaning on filter tank 3.Inner tube 17 is cylinder-like structure, its upper end shutoff, the charging aperture 15 of upper end and outer tube 16 is spaced apart, near the upper end of inner tube 17, be provided with a lot of sewage filter openings, the bottom of inner tube 17 is provided with sewage draining exit 18, be provided with a lot of sewage filter openings at its bottom end vicinity, these sewage filter opening apertures in inner tube 17 should be less than the particle diameter of filter medium-walnut shell.Between outer tube 16 and inner tube 17, form annular clearance, stainless steel end plate 19 sealing blockings that the annular clearance between the two is tightly connected by outer tube 16 lower ends; On end plate 19, be provided with the hole of stretching into for cleaning blow-off pipe 8, clean blow-off pipe 8 and extend into end plate 19, and be tightly connected with the sewage draining exit 18 of inner tube 17 bottoms, clean blow-off pipe 8 and be provided with stop valve.

Circulating pump 11 adopts stainless steel to make, and this circulating pump 11 is placed on pump seat 7, and the height of pump seat 7 is highly corresponding with filter tank 3.The pump orifice of circulating pump 11 is taken out and is expected that the cleaning material-pumping tube 13 that mouth is connected is tightly connected with cleaning on filter tank 3.

The course of work of the present utility model is (because filter process is consistent with conventional filter, do not repeat them here, this course of work is only to losing absorption, the filter medium cleaning and regeneration of filtering function recycles and is described): when the absorption of filter tank 3 inner filter media-walnut shell, while having tackled too much greasy dirt impurity, filter material layer 4 porositys that filter medium forms reduce, water head loss by filtration increases gradually, flow through filter material layer 4 water velocity also thereupon reduce, now entering of filter tank 3, outlet pressure reduction increases, control system is identified after this pressure difference, close the stop valve on sewage inlet pipe 1, stop the filtration operation of filter tank 3, open simultaneously and clean material-pumping tube 13, stop valve on clean cycle feed back pipe 9 and cleaning blow-off pipe 8, and start circulating pump 11, circulating pump 11 is extracted by cleaning material-pumping tube 13 the water liquid not being filtered in filter tank 3 out, and pressurization, send in cleaning device 10 by cross over pipe 22, send in filter tank 3 by clean cycle feed back pipe 9 again, enter the press water of filter tank 3 around the inwall eddy flow (tangent structure determines) of filter tank 3, in this process, the filter material layer 4 on filter bed 5 is formed to powerful impact, make its loosening and fluidisation, under the suction of circulating pump 11, loosening, the filter medium of fluidisation passes through to clean material-pumping tube 13 in company with water liquid, circulating pump 11, cross over pipe 22 enters in cleaning device 10, each filter medium of filter material layer 4 collides mutually in this course, friction, wash by rubbing with the hands, and then remove the greasy dirt impurity that sticks, between the outer tube 16 of the filter medium being cleaned by cleaning device 10 and inner tube 17, gap is (because the particle diameter of filter medium is greater than the sewage filter opening in inner tube 17, so filter medium can not enter in inner tube 17), 9 circulations of clean cycle feed back pipe enter in filter tank 3, and clean after sewage (comprising entrained impurity) under pressure, enter in inner tube 17 by the sewage filter opening in inner tube 17, then discharge by cleaning blow-off pipe 8, by this circulation process by all filter medium cleaning and regenerations of interior filter tank 3 filter material layer 4, enter filter tank 3 cycling and reutilizations, if when in this process, water liquid is less, control system is suitably augmented water liquid by the stop valve of opening on sewage inlet pipe 1, makes rinse water liquid keep balance, after complete to filter material layer 4 cleaning and regenerations, close the stop valve cleaning on material-pumping tube 13 and clean cycle feed back pipe 9, open the stop valve cleaning on tailing feed back pipe 12 simultaneously, remain in filter medium in cleaning device 10 under the effect of remaining water liquid, send in filter tank 3 by cleaning tailing feed back pipe 12, after material in cleaning device 10 is discharged totally, control system is closed and is cleaned tailing feed back pipe 12 and clean the stop valve on blow-off pipe 8, and circulating pump 11 is shut down.

Claims (10)

1. the walnut shell filter of an extracorporal circulatory system cleaning filtrate, comprise filter tank (3) and be arranged on the outside cleaning device (10) of filter tank (3), circulating pump (11), described filter tank (3) is provided with sewage inlet pipe (1), material mouthful is taken out in cleaning, clean cycle feedback outlet and drainage discharge pipe (6), in filter tank (3), be provided with filter bed (5), filter bed (5) is provided with filter opening and has walnut shell filtering material layer (4) upper accumulation of filter bed (5), it is characterized in that: the clean cycle feedback outlet on described filter tank (3) is in the bottom of filter material layer (4), and tangent with the inwall of filter tank (3), the inner tube (17) that described cleaning device (10) is mainly inserted in outer tube (16) by outer tube (16) and sealing forms, outer tube (16) is provided with charging aperture (15) and discharging opening (20), the charging aperture (15) of outer tube (16) is connected on circulating pump (11) by cross over pipe (22), circulating pump (11) is taken out material mouthful by cleaning material-pumping tube (13) and the cleaning on filter tank (3) and is connected, the discharging opening (20) of outer tube (16) is connected to by clean cycle feed back pipe (9) on the clean cycle feedback outlet of filter tank (3), described inner tube (17) is provided with sewage filter opening and sewage draining exit (18), on the sewage draining exit (18) of inner tube (17), be connected with the cleaning blow-off pipe (8) that extends outer tube (16).

2. the walnut shell filter of filtrate is cleaned in extracorporal circulatory system according to claim 1, it is characterized in that: described filter tank (3) is provided with and cleans tailing feedback outlet, and this cleaning tailing feedback outlet is in the top of filter material layer (4); On described clean cycle feed back pipe (9), lead to the cleaning tailing feed back pipe (12) communicating with the cleaning tailing feedback outlet on filter tank (3), on the clean cycle feed back pipe (9) that cleans tailing feed back pipe (12) and cleaning tailing feed back pipe (12) downstream, be respectively equipped with stop valve.

3. the walnut shell filter of filtrate is cleaned in extracorporal circulatory system according to claim 1, it is characterized in that: filter material layer (4) thickness on described filter bed (5) is 1.5～2m.

4. clean the walnut shell filter of filtrate according to extracorporal circulatory system described in claim 1 or 3, it is characterized in that: described filter bed (5) is upper and lower two-layer isolated sandwich, between interlayer, be provided with polylith support member, the top layer of filter bed (5) is provided with some filter openings, the bottom of filter bed (5) communicates with the drainage discharge pipe (6) extending in filter tank (3), drainage discharge pipe (6) is provided with stop valve, and mezzanine space forms drainage collection region.

5. the walnut shell filter of filtrate is cleaned in extracorporal circulatory system according to claim 1, it is characterized in that: the cleaning on described filter tank (3) is taken out material mouthful and drawn from sewage inlet pipe (1), cleans the sewage inlet pipe (1) of taking out material mouthful upstream and is provided with stop valve; Described and the cleaning on filter tank (3) are taken out the cleaning material-pumping tube (13) that material mouth is connected and are provided with stop valve.

6. the walnut shell filter of filtrate is cleaned in extracorporal circulatory system according to claim 1, it is characterized in that: outer tube (16) lower end of described cleaning device (10) is provided with the end plate (19) of the annular clearance forming between sealing blocking outer tube (16) and inner tube (17), clean blow-off pipe (8) and extend into end plate (19) and be tightly connected with the sewage draining exit (18) of inner tube (17), clean blow-off pipe (8) and be provided with stop valve.

7. the walnut shell filter that cleans filtrate according to extracorporal circulatory system described in claim 1 or 6, is characterized in that: described cleaning device (10) adopts stainless steel to make.

8. the walnut shell filter of filtrate is cleaned in extracorporal circulatory system according to claim 1, it is characterized in that: it is upper that described circulating pump (11) is placed on pump seat (7), and the height of pump seat (7) is highly corresponding with filter tank (3).

9. the walnut shell filter of filtrate is cleaned in extracorporal circulatory system according to claim 1, it is characterized in that: described cross over pipe (22) is provided with evacuation port (14).

10. the walnut shell filter of filtrate is cleaned in extracorporal circulatory system according to claim 1, it is characterized in that: described filter tank (3) is provided with oil gas outlet, is connected with oil gas discharge pipe (2) on oil gas outlet.