CN203829743U - Pulse backwashing bag type sewage fine filter device - Google Patents

Abstract

Disclosed is a pulse backwashing bag type sewage fine filter device. The pulse backwashing bag type sewage fine filter device comprises an upper cavity and a lower cavity. The upper end surface of the upper cavity is closed through an upper plug; a partition plate is mounted between the upper cavity and the lower cavity and provided with a plurality of filtering bags, the upper opening of every filtering bag is communicated with the upper cavity, and the filtering bags are fixed through an inner frame and an outer frame which are fixed onto the partition plate; the lower portion of the lower cavity is connected with a forward filtering water inlet and a forward filtering water outlet, wherein the forward filtering water inlet extends inwards to penetrate the lower cavity and be communicated with the upper cavity and is connected with an external forward filtering water inlet valve and an external backwashing water outlet valve, and the forward filtering water outlet is connected with an external forward filtering water outlet valve and a backwashing water inlet valve; the backwashing water inlet valve is connected with a backwashing pump; the forward filtering water inlet, the backwashing water outlet valve, the forward filtering water outlet valve, the backwashing water inlet valve and the backwashing pump are connected with a controller through signals. The pulse backwashing bag type sewage fine filter device has the advantages of having a backwashing function, achieving filter bag regeneration, being simple in structure, low in equipment operating cost, high in filtering process working efficiency and low in labor intensity of operators and the like.

Description

A kind of pulse backwashing pocket type sewage ultra-fine filter device

Technical field:

The utility model relates to disposing polluted water in oil technical field, is specifically related to the back-washable fine filtering apparatus of a kind of pocket type.

Background technology:

Water treatment filtration process is mainly to remove the fine suspension in water inlet by the hole of filtering layer, realizes purification of water quality.Along with the operation of filtering, that from water, removes collects the porosity that can reduce filter course at the material on filtering layer surface with storage, making to be increased and acted on the shear stress gathering on flco by the loss of flood peak of filtering layer increases, finally, gross head loss may approach or equal current by predetermined amount of flow required head during by filtering layer.Before above-mentioned phenomenon occurs, filter must quit work, and carries out reverse cleaning.Traditional sandfiltration pot, it belongs to deep-bed filtration, makes filtrate expand in the time of backwash, and filter bed distortion, increases filtrate gap, thereby the trapped substance being mingled with in filtrate is taken away, and realizes media regeneration.Traditional filter bag type filter, owing to there is no fixed support in filter bag, if adopt backwash process, the fluid reverse flow in equipment, filter bag can be along with flow direction crimp, the stacked pressure of final layer, causes circulation not smooth, and serious words also likely cause the breakage of filter bag, the impurity being originally mixed in filtering layer cannot be removed, so can not realize filter bag regeneration, in order to ensure the normal use of filter plant, can only change filter bag in the time that the filter pressure of filter is elevated to a certain degree.Cause traditional filter bag type filter filtering material to change frequent, equipment operating cost is high, filtering technique inefficiency, and operator's labour intensity is large.

Utility model content:

In order to overcome the deficiency existing in background technology, the utility model provides a kind of pocket type back-washable fine filtering apparatus, and this device has anti-Xian Gongneng and realizes filter bag regeneration.Simple in structure, equipment operating cost is low, and filtering technique operating efficiency is high, and operator's labour intensity is little, is easy to the advantages such as maintenance.

The technical solution adopted in the utility model is: this pulse backwashing pocket type sewage ultra-fine filter device is divided into upper cavity, lower chamber, upper cavity upper surface adopts the sealing of fast-open type upper cover, at upper cavity, dividing plate is installed between lower chamber, multiple filter bags are installed on dividing plate, filter bag upper shed communicates with upper cavity, filter bag adopts inner frame and outer skeleton to fix, inner frame and outer skeleton are fixed on dividing plate, lower chamber bottom is connected with positive filter influent mouth, just leaching the mouth of a river, positive filter influent mouth extends internally and is connected with upper cavity through lower chamber, the positive filter influent valve of positive filter influent mouth and outside, backwash outlet valve joins, just leaching the mouth of a river and the outside water valve that just leaches, backwash water intaking valve joins, backwash water intaking valve connects backwashing pump, positive filter influent valve, backwash outlet valve, just leaching water valve, backwash water intaking valve, backwashing pump is connected with controller signals respectively.

All internals of the filter in such scheme and medium contact all adopt Stainless steel application polytetrafluoroethylene (PTFE) material.The treatment surface load of this filter bag is 1.5m ³/ ㎡ h, backwash intensity is 1L/s ㎡～2L/s ㎡, the backwash time is 3min～5min.

The beneficial effect the utlity model has is: the utility model be mainly can not backwash and regeneration filter bag for traditional filter bag type filter drawback, when retaining the outer skeleton of original bag type filter in this patent, increase inner frame.By the mode of the transformation in internal structure and increase inner frame, realize the requirement of backwash.Why filter bag can not realize backwash is mainly not support due to inner under the state of backwash, when filter bag generation deformation, be uncontrolled, so unpredictability that has so just caused structure of filter bag to change, in the time that the inside of filter bag is provided with inner frame, in the process of backwash, inside can effectively be supported equally, the distortion of filter bag is under control, so whole active forces all acts on the surface of filter cloth, make filter bag realize oppositely swollen rising, instead of the contraction distortion of filter bag, reverse swollen the rising of filter bag makes filter bag inner surface hole diameter become large, thereby backwash water is taken away filter bag inner surface trapped substance, realize filter bag backwash and regeneration.This structure can either ensure that backwash intensity can adjust again the duty of filtering material while just filtering with backwash, thereby reaches desirable backwash effect.

Because traditional bag type filter cannot backwash can only be changed filter bag, outside has skeleton to support, and often traditional filter bag material is only considered filtering accuracy, without the intensity of considering material.Designed structure in this patent, requires filter bag filtering accuracy, in the time just filtering with the switching of backwash, need to bear certain dynamic loading and have certain mechanical strength.Therefore this patent adopts polyester acupuncture one side heat treatment filter bag, and polyester acupuncture one side heat treatment filter bag has the plurality of advantages such as mechanical strength is high, density is large, filtering accuracy is high, and this kind of material can also improve service life in meeting filtering accuracy.

Brief description of the drawings:

Accompanying drawing 1 is structural representation of the present utility model;

Accompanying drawing 2 is filtration condition schematic diagrames of the present utility model;

Accompanying drawing 3 is backwash view of the present utility model;

Accompanying drawing 4 is partial structurtes sketches of the present utility model;

Accompanying drawing 5 is pulse backwashing strength control schematic diagrames of the present utility model.

Detailed description of the invention:

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

This pulse backwashing pocket type sewage ultra-fine filter device is divided into upper cavity 2, lower chamber 4, upper cavity 2 upper surfaces adopt fast-open type upper cover 1 to seal, this bag type filtering apparatus inner frame 9 adopts fast-open type upper cover 1 to design under the condition that ensures to meet backwash intensity, can change fast filter bag 8.Between upper cavity 2, lower chamber 4, dividing plate 3 is installed, multiple filter bags 8 are installed on dividing plate 3, filter bag 8 adopts hydrophilic and oleophobic type polyester acupuncture one side heat treatment material, good springiness, is convenient to backwash and regeneration; Filtering accuracy is divided into tri-kinds of 1 μ m, 2 μ m, 3 μ m, ensures the in the situation that of condition of equivalent thickness, to have higher density and filtering accuracy.Filter bag 8 upper sheds communicate with upper cavity 2, filter bag 8 adopts inner frame 9 and outer skeleton 7 to fix, and inner frame 9 and outer skeleton 7 are fixed on dividing plate 3, have increased inner frame 9 in the inside of filter bag 8, filter bag 8 is fixed between inner frame 9 and outer skeleton 7, enables to realize backwash.Lower chamber 4 bottoms are connected with positive filter influent mouth 5, just leach the mouth of a river 6, positive filter influent mouth 5 extends internally and is connected with upper cavity 2 through lower chamber 4, positive filter influent mouth 5 joins with outside positive filter influent valve 13, backwash outlet valve 14, just leaching the mouth of a river 6 and outside just leach water valve 12, backwash water intaking valve 11 joins, backwash water intaking valve 11 connects backwashing pump 10, positive filter influent valve 13, backwash outlet valve 14, just leaches water valve 12, backwash water intaking valve 11, backwashing pump 10 and is connected 15 with controller signals respectively.Controller 15 adopts conversion system control backwashing pump 10 flows, adopts pulse backwashing mode, can effectively prevent the damage of deformation to filter bag.

All internals of filter and medium contact all adopt Stainless steel application polytetrafluoroethylene (PTFE) material.This material is burn into non-scaling not, and filter bag is not denuded.

The treatment surface load of this filter bag 8 is 1.5m ³/ ㎡ h, backwash intensity is 1L/s ㎡～2L/s ㎡, the backwash time is 3min～5min.

Filter for installation is divided into upper and lower two cavitys, between upper and lower cavity, dividing plate 3 is installed, multiple filter bags 8 are installed on dividing plate, completing while just filtering journey, carrying out liquid is boosted and is entered the upper cavity 2 of bag type filtering apparatus afterwards by booster, after filtering by filter bag, enter lower chamber 4, after catchmenting in lower chamber 4, discharge.When filter inlet outlet pressure differential raises, need to carry out backwash time, by backwashing pump, backwash water is squeezed into the lower chamber 4 of filter, the positive filter influent mouth 5 of this timer becomes backwash delivery port 5, the mouth of a river 6 that just leaches of device becomes backwash water inlet 6, when device lower chamber 4 pressure raise to a certain degree time, fluid in device starts to change the flow direction, the liquid reverse flow of filter bag 8 both sides, the impurity that is originally trapped in filter bag 8 inner surfaces is taken away, finally discharge tank body by just leaching the mouth of a river 5, after the positive filter influent mouth 6 of equipment and the pressure reduction that just leaching the mouth of a river 5 were reduced to a certain degree at that time, backwash finishes, start from new filtration.Reach need to change filter bag 8 service life time at equipment, first all filter intake-outlets are closed, by emptying device inside, then the upper cover of device 1 is opened, installing hole and the skeleton of multiple filter bags are installed in device, filter bag 8 and inner frame 9 thereof that needs are changed disassemble, and then new filter bag 8 is installed, then filter bag 8 and inner frame 9 are reinstalled go back to original position, after replacing filter bag 8 completes, close upper cover 1, complete maintenance, can reuse.Install water after treatment by this as follows through Daqing oil field reservoir water drive injection water quality index and analytical method (Q/SY DQ0605-2006) analysis result: water outlet oil-containing is not more than that 5 ㎎/L, suspension content are not more than 5 ㎎/L, median particle size is not more than 2 μ m, and effluent quality reaches oil field low-permeability oil deposit re-injection water quality standard or returns and join standard-required.

Operating personnel only need the pressure reduction of monitoring intake-outlet in the day-to-day operation of equipment, judge whether to need backwash, then carry out backwash process by the valve on switch process pipeline, the pressure reduction that need to monitor backwash when backwash and be intake-outlet judges backwash effect, when reaching after backwash effect, the valve from new adjusting process pipeline returns to filtering process.While needing backwash, first close the water intaking valve 13 of just filtering and just leaching water valve 12, then opening backwash water intaking valve 11 and backwash outlet valve 14, then starting backwash water pump 10.

Filter bag deformation damage when preventing anti-Xian, controller 15 adopts conversion system control backwashing pump 10 flows, make backwash flow form pulse variable, deformation intensity while effectively having controlled filter bag backwash, because filter bag 8 adopts the polyester acupuncture one side heat treatment material of good springiness, therefore,, under the flexible effect of filter bag 8 after backwash, can return to voluntarily original filtration hole state.

Fig. 2 is the duty of filter bag part while just filtering journey, and Fig. 3 is the work shape body of backwash process filter cloth, can find out by diagram, what in the time just filtering, filter bag presented is inner side extruding, the duty of outer side stretching, what when backwash, filter bag presented is interior side stretching, the duty of outside extruding.In two processes of just filtering with backwash, what filter bag presented is two kinds of different duties, inside and outside in the variation of two kinds of duties, can both obtain skeleton effectively supports, the distortion of filter bag is under control, thereby realize the effect of the clean filter bag inner surface trapped substance of backwash, make the regeneration of filter bag, improved life of bag filter.

Claims (3)

1. a pulse backwashing pocket type sewage ultra-fine filter device, it is characterized in that: filter for installation is divided into upper cavity (2), lower chamber (4), upper cavity (2) upper surface adopts fast-open type upper cover (1) sealing, in upper cavity (2), dividing plate (3) is installed between lower chamber (4), at the upper multiple filter bags (8) of installing of dividing plate (3), filter bag (8) upper shed communicates with upper cavity (2), filter bag (8) adopts inner frame (9) and outer skeleton (7) to fix, inner frame (9) and outer skeleton (7) are fixed on dividing plate (3), lower chamber (4) bottom is connected with positive filter influent mouth (5), just leaching the mouth of a river (6), positive filter influent mouth (5) extends internally and is connected with upper cavity (2) through lower chamber (4), the positive filter influent valve (13) of positive filter influent mouth (5) and outside, backwash outlet valve (14) joins, just leaching the mouth of a river (6) and the outside water valve (12) that just leaches, backwash water intaking valve (11) joins, backwash water intaking valve (11) connects backwashing pump (10), positive filter influent valve (13), backwash outlet valve (14), just leaching water valve (12), backwash water intaking valve (11), backwashing pump (10) is connected respectively (15) with controller signals.

2. pulse backwashing pocket type sewage ultra-fine filter device according to claim 1, is characterized in that: all internals of filter and medium contact all adopt Stainless steel application polytetrafluoroethylene (PTFE) material.

3. pulse backwashing pocket type sewage ultra-fine filter device according to claim 2, is characterized in that: the treatment surface load of this filter bag (8) is 1.5m3/ ㎡ h, and backwash intensity is 1L/s ㎡～2L/s ㎡, and the backwash time is 3min～5 min.