CN201978552U - Double-way backwashing pressure filtering tank - Google Patents

Abstract

The utility model relates to a double-way backwashing pressure filtering tank which comprises a tank body (1), a stirrer (2) and a filter bed (3), wherein the stirrer is vertically arranged in the centre of the tank body; both a water inlet (4) and a water outlet (5) of sieve tubes (14, 14a) are formed on the tank body; the tank body is connected with an overflow pipe (7) and a gas exhaust pipe (8); the filter bed is mounted inside the tank body; the water inlet is connected with a filtering water inlet pipe (10) and a backwashing water drain pipe (11); the water outlet is connected with a filtering water outlet pipe (12) and a backwashing water inlet pipe (13); valves (15, 15a, 15c, 15d, 15e and 15f) are mounted on all the overflow pipe, the gas exhaust pipe, the filtering water inlet pipe, the backwashing water drain pipe, the filtering water outlet pipe and the backwashing water inlet pipe; and a sewage draining exit (6) is formed at the upper part of the tank body and connected with a sewage draining pipe (9) on which a valve (15b) is mounted. By using the utility model, the problems that the filter is incompletely backwashed and the sieve tubes are easy to be blocked can be solved.

Description

Two-way backwash pressure filtering tank

Technical field

The utility model relates to filter, concrete is a kind of two-way backwash pressure filtering tank.

Background technology

Along with the continuous increase of oil field oil production, must cause underground oil level decline and influence oil production.Be constant rate of production, must be to underground flooding, to reach the purpose of raising oil level, being convenient to recover the oil.During the re-injection oil-polluted water, must be through the water processor machinery filter, after the oil removal treatment, the ability re-injection can produce a desired effect.But, after filter moves a period of time, filter material surface absorption on the filter bed and sump oil, the solid impurity particle of holding back reach capacity, filtrate has lost filtering function, at this moment will wash filtrate, remove the greasy dirt and the impurity particle of filter material surface absorption, make filtrate recover filtering function, come into operation again.

Chinese patent CN00254583.7 provides a kind of water processor machinery filter, built-in agitator, and connect filtered water inlet pipe and backwash outlet pipe in the water inlet, the connection of delivery port place filters out water pipe and backwash water inlet pipe, close backwash water inlet pipe and backwash outlet pipe at ordinary times, water processor machinery filter normal row crosses the filter function.Greasy dirt on the filtrate state that reaches capacity, in the time of need washing filtrate, close the filtered water inlet pipe and filter out water pipe, open backwash water inlet pipe and backwash outlet pipe, inject clear water, start agitator simultaneously, filtrate bumps mutually and rubs under the effect of agitator, greasy dirt and solid impurity particle that clear water will be included between the filtrate slit are taken away, and discharge by the backwash outlet pipe, are discharged to the outer cesspool of filter and get final product.After backwash a period of time, reopen the filtered water inlet pipe and filter out water pipe, water processor machinery filter normal row crosses the filter function.

This kind filter can regularly wash filtrate, removes greasy dirt, makes filtrate recover original filtering function, comes into operation again, can solve to a certain extent owing to filtrate reaches capacity and lose the problem of filtering function.But because the screen casing aperture of water inlet is less, during backwash, the backwashing water that has greasy dirt need be discharged from the water inlet, and a large amount of greasy dirts can cause the obstruction of screen casing, and influence is produced.

Summary of the invention

The purpose of this utility model is to provide a kind of two-way backwash pressure filtering tank at the problems referred to above, and it is not thorough to solve existing filter backwash, and media regeneration is insufficient, and blocking problem takes place screen casing easily.

The utility model is achieved through the following technical solutions: two-way backwash pressure filtering tank is made of tank body, agitator and filter bed, agitator is in the vertical setting of tank body central authorities, water inlet, delivery port are arranged on the tank body, screen casing all is housed on water inlet and the delivery port, tank body is connected with overflow pipe and blast pipe, and tank interior is equipped with filter bed; Water inlet is connected with filtered water inlet pipe, backwash drainpipe; Delivery port with filter out water pipe, the backwash water inlet pipe is connected; Overflow pipe, blast pipe, filtered water inlet pipe, backwash drainpipe, filter out on water pipe, the backwash water inlet pipe valve all is installed, tank body top has sewage draining exit, and sewage draining exit is connected with blow-off pipe, and valve is installed on the blow-off pipe.

Adopt the good effect of technique scheme: the utility model is set up sewage draining exit above filter, and sewage draining exit can not be installed screen casing in order to prevent greasy dirt from stopping up sewage draining exit, with in oil extraction, the rinse cycle and stir the flushing water that carries greasy dirt in the flushing process and discharge from sewage draining exit and water inlet respectively, solve screen casing blocking problem takes place easily, media regeneration is abundant, improved backwash effect, can significantly relax the requirement that comes the water oil content, impact resistance is stronger.

Four, description of drawings

Fig. 1 is the structural representation of utility model.

Among the figure: 1 tank body, 2 agitators, 3 filter beds, 4 water inlets, 5 delivery ports, 6 sewage draining exits, 7 overflow pipes, 8 blast pipes, 9 blow-off pipes, 10 filtered water inlet pipes, 11 backwash drainpipes, 12 filter out water pipe, 13 backwash water inlet pipes, manhole on 14, the 14a screen casing, 15,15a, 15b, 15c, 15d, 15e, 15f valve, 16,17 times manholes, 18 hand holes, visor on 19,20 times visors, 21,21a end socket, 22 skirts, 23 ladder fences.

Five, the specific embodiment: the utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1 is a structural representation of the present utility model, and as shown in the figure, two-way backwash pressure filtering tank is made of tank body 1, agitator 2 and filter bed 3, and agitator 2 is vertical setting of tank body 1 central authorities, and agitator 2 is made up of motor, motorized speed reducer, shaft and blade.Water inlet 4, delivery port 5 are arranged on the tank body 1, and tank body 1 is connected with overflow pipe 7 and blast pipe 8.Screen casing 14 and screen casing 14a all are housed on water inlet 4 and the delivery port 5, and purpose is in order to prevent that tiny filtrate from being washed away by current.Tank body 1 inside is equipped with filter bed 3, place filtrate on the filter bed 3, filtrate generally can be selected from the purity height, density is big, hardness is high, ganoid quartz sand or magnetic iron ore, can effectively remove greasy dirt and solid particle in the water, and long service life is difficult for the loss filtrate.Water inlet 4 is connected with filtered water inlet pipe 10, backwash drainpipe 11.Delivery port 5 with filter out water pipe 12, backwash water inlet pipe 13 is connected.Overflow pipe 7, blast pipe 8, filtered water inlet pipe 10, backwash drainpipe 11, filter out valve 15, valve 15a, valve 15c, valve 15d, valve 15e, valve 15f are installed on water pipe 12, the backwash water inlet pipe 13.During work, the valve 15 on the overflow pipe 7 must often be opened, and flows down to guarantee the liquid that agitator 2 reel roots are overflowed.Valve 15a on the blast pipe 8 is used for exhaust and air inlet when tank body 1 water inlet and emptying.Valve 15c on the filtered water inlet pipe 10, the valve 15d on the backwash drainpipe 11, filter out that valve 15e, the valve 15f on the backwash water inlet pipe 13 on the water pipe 12 is mainly used in controlled filter water inlet pipe 10, backwash drainpipe 11, filters out water pipe 12, the on off state of backwash water inlet pipe 13, determined it is to carry out filtering process or backwash flow process at present.Sewage draining exit 6 is arranged at tank body 1 top, sewage draining exit 6 is connected with blow-off pipe 9, valve 15b is installed on the blow-off pipe 9, valve 15b on the blow-off pipe 9 is mainly used to discharge the crude oil of backwashing water in the accumulation of tank body 1 upper space, the general row of 6h at interval once, general 1 ~ the 2min that continues closes this valve and gets final product after finishing.For the duty to filtering tank is observed at any time, can have on tank body 1 outer wall manhole 16, down manhole 17, hand hole 18, on visor 19 and following visor 20.Tank body 1 upper and lower end all has half elliptic end socket 21, end socket 21a, and tank body 1 bottom has skirt 22, one sides that ladder fence 23 is arranged, and is convenient to the staff and arrives tank body 1 top and check duty and this device is keeped in repair.

During use, open the valve 15c and the valve 15e that filters out water pipe 12 of filtered water inlet pipe 10, oil-polluted water enters from water inlet 4, behind the media filtration on the filter bed 3, removes greasy dirt and solid impurity particle, discharges from the delivery port 5 of bottom.After operation a period of time, sump oil, solid impurity particle that filter bed 3 upper strata filter material surface absorption and filtering layer are held back reach capacity, filtering layer has lost strainability, at this moment will carry out backwash to filtrate, and, make filtering layer upwards have certain expansion to disperse promptly from the reverse water inlet of filtering direction, crude oil and solid particle that clear water will be contained between filtering layer are taken away, be discharged to the outer cesspool of filtering tank, and then recover the filtering function of filtering layer, come into operation again.

Earlier with the valve 15c of filtered water inlet pipe 10 with filter out water pipe 12 valve 15e and close, open the valve 15f and the blow-off pipe 9 valve 15b of backwash water inlet pipe 13, start backwashing pump, backwashing water enters filtering tank with small intensity from delivery port 5, close backwashing pump, backwashing water is discharged from sewage draining exit 6.The flow velocity of backwashing water is less relatively in this process, because sewage draining exit 6 is not installed screen casing, less relatively flow velocity can prevent that filtrate runs off, and the greasy dirt of formation is discharged from sewage draining exit 6.Because sewage draining exit 6 do not install screen casing, thus greasy dirt by the time can not cause the obstruction of pipeline.

Open the valve 15d of backwash drainpipe 11 then, the valve 15b with blow-off pipe 9 closes simultaneously, and backwashing water enters filtering tank with big intensity from delivery port 5, starts agitator 2 simultaneously and stirs.Stop agitator 2 after keeping a period of time, close the valve 15d on the backwash drainpipe 11, treat that filtrate falls after rise steadily, backwashing water is discharged from water inlet 4.Owing at water inlet 4 places screen casing 14 is housed, filtrate can not run off under the situation that flow strengthens.

Open the valve 15b of blow-off pipe 9 at last, valve 15d with backwash drainpipe 11 closes simultaneously, start backwashing pump, backwashing water enters filtering tank with small intensity from delivery port 5, close down backwashing pump after keeping a period of time, close the valve 15f of backwash water inlet pipe 13 and the valve 15b on the blow-off pipe 9, open filtered water inlet pipe 10 and the valve 15c and the valve 15e that filter out on the water pipe 12, backwashing water is discharged from sewage draining exit 6 and is got final product.

After the backwash overall process was finished, sump oil, solid impurity that absorption of filter bed upper strata filter material surface and filtering layer are held back were discharged with backwashing water, and filter bed upper strata filtrate has recovered original strainability, continues filtration work.

Claims (1)

1. two-way backwash pressure filtering tank, constitute by tank body (1), agitator (2) and filter bed (3), agitator (2) vertically is provided with in tank body (1) central authorities, water inlet (4), delivery port (5) are arranged on the tank body (1), screen casing (14,14a) all is housed on water inlet (4) and the delivery port (5), tank body (1) is connected with overflow pipe (7) and blast pipe (8), and tank body (1) inside is equipped with filter bed (3); Described water inlet (4) is connected with filtered water inlet pipe (10), backwash drainpipe (11), described delivery port (5) with filter out water pipe (12), backwash water inlet pipe (13) is connected; Overflow pipe (7), blast pipe (8), filtered water inlet pipe (10), backwash drainpipe (11), filter out valve (15,15a, 15c, 15d, 15e, 15f) all is installed on water pipe (12), the backwash water inlet pipe (13), it is characterized in that: described tank body (1) top has sewage draining exit (6), sewage draining exit (6) is connected with blow-off pipe (9), and valve (15b) is installed on the blow-off pipe (9).