CN1035305C

CN1035305C - Floating bed filter

Info

Publication number: CN1035305C
Application number: CN94108064A
Authority: CN
Inventors: 杨金旺
Original assignee: 杨金旺
Current assignee: China Power Engineering Consulting Group Corp
Priority date: 1994-08-08
Filing date: 1994-08-08
Publication date: 1997-07-02
Anticipated expiration: 2014-08-08
Also published as: CN1116560A

Abstract

The present invention discloses a bed floating filter which belongs to the water treatment equipment. The bed floating filter is suitable for intercepting solid particles in liquid and is composed of a casing (5), an inlet (4), an outlet (1), a perforated plate (6) and filter materials (7), wherein the casing (5) is a diameter-changing tube structure with a big top, a small bottom and a progressive middle; the inlet (4) is arranged at the lower part of the casing (5) and the outlet (1) is arranged at the upper part of the casing (5); the perforated plate (6) is arranged in a cavity at the upper part of the casing (5); the filter materials (7) are loaded under the perforated plate (6). The bed floating filter has the characteristics of deep filtration, high operation flow speed, little resistance and strong dirt intercepting ability and overcomes the shortcomings of low operation flow speed low, large resistance and low dirt intercepting ability in the existing filter.

Description

Floating bed filter

The invention discloses a kind of floating bed filter, belong to a kind of water treatment facilities, be applicable to and hold back solid particle contained in the liquid.

At present, there is the filter of various ways can hold back solid particle contained in the liquid, common have a gravity filter (pond), pressure filter, this class filter housings mostly is columnar structured, current pass Shi Buhui and change on the flow velocity occurs because of the variation of shell structure, in order to improve filter effect, make suspended solid can enter filter bed and to certain depth, the filter that has has adopted two-layer or multilayer filtrate of different nature, the in-depth filtration of Shi Xianing exists following problem like this: in flushing process, for each metafiltration material, because of the hydraulic classiciation effect, can make very thin filtrate concentrate on this laminar surface, cause bed face to stop up, cause running resistance sharply to increase; In running, the mutual collision in mutual extrusion between filtrate and the backwash process causes some filtrates to break, and the coefficient of uniformity (coefficient is more little, and the hydraulic classiciation phenomenon is light more) that this can strengthen filtrate causes the bed face clogging to eradicate.

The purpose of this invention is to provide a kind of novel floating bed filter, it has whole bed can both hold back suspended solid in the liquid, has realized in-depth filtration, and operation flow velocity height, resistance are little, the characteristics that retaining power is strong.

The object of the present invention is achieved like this: a kind of floating bed filter, it is made up of housing, import, outlet, porous plate, filtrate, wherein: housing is to go up greatly, descend the reducing cylinder body structure little, that the middle part is progressive, import is in lower housing portion, outlet is on housing top, porous plate places in the housing upper cavity, and filtrate is contained in below the porous plate.

Wherein, the housing middle part has the air bump rinse operation import; Water-locator is equipped with at progressive body place, housing middle part; Have charging aperture and discharging opening on the housing;

But filtering materials such as filtrate quartz sand, marble, anthracite, activated carbon, manganese sand.

Advantage of the present invention is: because that filter has adopted is big, little, reducing cylinder body structure that the middle part is progressive down, created condition for forming floating bed, when fluid passes filter, in different barrel dliameters, the flow velocity difference, utilize these characteristics of change in flow, filtrate is held up, the formation floating bed, the filter of this structure not only retaining power is strong, also having realized can realizing with a kind of filtrate the purpose of in-depth filtration, is columnar structuredly to have the pressure filter of two-layer (or multilayer) filtrate to compare with conventional housing, and advantage is as follows:

Key data comparison sheet project bilayer filter the utility model filtrate upper strata anthracite lower floor quartz sand quartz sand operation flow velocity (m/h) 12～16 25～30 volumes size resistance loss (mH2O) 15 15 equipment manufacturing cost height retaining powers (Kg/M3) of two kinds of filters are little to require＜1.5＜2.0 to the filtrate coefficient of uniformity greatly

Simultaneously, the reducing cylindrical shell filter that up big and down small middle part is progressive, fluid under advance, on when going out, the control flow is dashed filtrate, the up-small and down-big filtering layer in a generation layering formation footpath promptly reaches the operation flow after bed forms; The big particle diameter suspension that carries in the fluid is at first held back by the big particle diameter filtering layer in bottom, the upper strata small particle diameter filtering layer that touches behind the small particle diameter suspension quilt is held back, whole like this filter course all has retaining power, all bigger than existing any bed filter retaining power, because trapped substance branch, can not produce the phenomenon of stopping up bed face at whole filtering layer; The air bump rinse operation import at housing middle part has solved filter after operation a period of time, and the adhesive under holding back is with filtrate bonding, the problem that inconvenience is washed;

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a running status schematic diagram of the present invention;

Below in conjunction with accompanying drawing the present invention is done further to discuss in detail:

Embodiment 1:

A kind of floating bed filter, it is made up of housing 5, import 4, outlet 1, air bump rinse operation import 9, charging aperture 2, discharging opening 3, porous plate 6, filtrate 7, water-locator 8;

Housing 5 is to go up greatly, descend the reducing cylinder body structure little, that the middle part is progressive, the diameter ratio of major diameter and minor diameter, according to conditional decisions such as used filtrate proportion, particle size, operation flow velocitys, major diameter of the present invention can be selected 3.2 meters～0.8 meter for use, and minor diameter can be selected 2.8 meters～0.3 meter for use; The angle of the reducing place conical surface and cylindrical shell can be selected 30 °～45 ° for use; The present embodiment major diameter is 2.2 meters, 0.7 meter of minor diameter, the height of top cylindrical shell can be selected arbitrarily according to required filter course thickness, present embodiment selects 2.3 meters, the height of bottom cylindrical shell is selected according to the quantity that becomes the required filtrate of bed thickness, present embodiment selects 2.5 meters, and the filtrate of present embodiment is selected the quartz sand of particle diameter between 0.5～1mm for use;

Import 4 is in housing 5 bottoms, outlet 1 is on housing 5 tops, air bump rinse operation import 9 is at progressive body place, housing 5 middle parts, have charging aperture 2 on housing 5 tops, the bottom has discharging opening 3, and porous plate 6 is fixed in housing 5 upper cavity, water cap 10 is housed on the porous plate 6, filtrate 7 is contained in below the porous plate 6, and water-locator 8 is weldingly fixed on by supporting leg in the progressive body cavity at housing 5 middle parts according to conventional method;

Wherein, in the import 4 water intaking valve K1 is housed; Outlet 1 connects two-way, and one the tunnel is delivery port, and outlet valve K2 is housed on it, and another road is a discharge outlet, and draining valve K3 is housed on it; Intake valve K8 is housed in the air bump rinse operation import 9; Charging aperture 2 also is connected to two-way, and one the tunnel is the filtrate import, and filtrate inlet valve K5 is housed on it, and another road is anti-row's mouth, and backwash draining valve K4 is housed on it; Discharging opening 3 also is connected to two-way, and one the tunnel is the filtrate outlet, and filtrate dump valve K7 is housed on it, and another road is the waste discharge mouth of a river, and bottom discharge valve K6 is housed on it.

Work, the backwash process of present embodiment are as follows:

At first, open draining valve K3, the progressive water intaking valve K1 that opens, last a little while (as: 5～10 minutes), floating bed forms, and flushing certain hour (as: about five minutes) is opened outlet valve K2, closes draining valve K3, and equipment enters running status;

After the cycle of operation finishes, close outlet valve K2, open backwash draining valve K4, carry out backwash, purpose is to remove the foreign material that are trapped, and (as 2～5 minutes) close water intaking valve K1 after a few minutes, open bottom discharge valve K6, when water level in the filter exceeds filtrate a bit (as about 6.4m), close draining valve K6, open intake valve K8, after carrying out air bump rinse operation (as: a minute), close K8; Open water intaking valve K1, wash a few minutes (as 5～10 minutes) once more, afterwards, backwash is finished, and closes water intaking valve K1, backwash draining valve K4, and filter is in stand-by state;

Several cycles are carried out the primary air scouring, are to determine according to the characteristic of water inlet suspension solid.

The size of selecting, determine particle diameter for use of filtrate in the filter, be according to the granular size of suspension in the feed liquor and character and fixed, filtrate in the floating bed filter can adopt the filtrate of other material to be used for various filter processes, as: filtering materials such as quartz sand, marble, anthracite, activated carbon, manganese sand.

Content of the present invention is not only for described embodiment.

Claims

1. floating bed filter, it is made up of housing (5), import (4), outlet (1), porous plate (6), filtrate (7), it is characterized in that: housing (5) top is that diameter is that 3.2～0.8 meters cylinder, bottom is that diameter is that 2.8～0.3 meters cylinder, middle part is the back taper stage body, inversed taper platform body cone and housing (5) axis angle is 30～45 degree, import (4) is in housing (5) bottom, outlet (1) is on housing (5) top, porous plate (6) places in housing (5) upper cavity, and filtrate (7) is contained in below the porous plate (6).

2. floating bed filter as claimed in claim 1 is characterized in that: housing (5) top is that diameter is that 2.2 meters cylinder, bottom is that diameter is 0.7 meter a cylinder.

3. floating bed filter as claimed in claim 1 or 2 is characterized in that: back taper stage body place has air bump rinse operation import (9) at housing (5) middle part.

4. floating bed filter as claimed in claim 1 or 2 is characterized in that: water-locator (8) is equipped with at back taper stage body place at housing (5) middle part.

5. floating bed filter as claimed in claim 3 is characterized in that: water-locator (8) is equipped with at back taper stage body place at housing (5) middle part.

6. floating bed filter as claimed in claim 5 is characterized in that: have charging aperture (2) and discharging opening (3) on housing (5).

7. floating bed filter as claimed in claim 6 is characterized in that: filtrate (7) is quartz sand or marble or anthracite or activated carbon or manganese sand.