CN103768857A

CN103768857A - Sewage filter

Info

Publication number: CN103768857A
Application number: CN201410042820.7A
Authority: CN
Inventors: 魏龙龙; 其他发明人请求不公开姓名
Original assignee: SHENZHEN BUSTIN TECHNOLOGY Co Ltd
Current assignee: SHENZHEN BUSTIN TECHNOLOGY Co Ltd
Priority date: 2014-01-28
Filing date: 2014-01-28
Publication date: 2014-05-07

Abstract

The invention provides a sewage filter. The sewage filter comprises a tank body, wherein a water inlet pipe and a back-flushing water outlet pipe are arranged at the top of the tank body, an oil discharging hole is formed in the top of the tank body, an air inlet pipe, and a water discharging pipe and a sewage discharging pipe are arranged at the bottom of the tank body; multi-stage filtering devices are arranged in the tank body, the first-stage filtering device is arranged above the second-stage filtering device, sewage is guided into through the water inlet pipe and is filtered by the first-stage filtering device, oil stain floats up to the oil discharging hole and is guided out, and after the oil stain is removed, the sewage is filtered by the second-stage filtering device and is discharging out through the water outlet pipe. According to the sewage filter, the sewage is subjected to stage treatment respectively through two-stage purification procedures according to the characteristics of the different filtering devices, so that the pollution of the oil stain to a pipeline and a filter membrane can be avoided, the cleaning cost and the maintaining cost of the filter are lowered, and the sewage purification efficiency and quality are obviously improved as well.

Description

A kind of effluent filter

Technical field

The present invention relates to sewage treatment area, refer in particular to a kind of effluent filter.

Background technology

Industrialization oil-polluted water complicated component, contain oil slick, silt or oil-containing fixture etc., main two media or the more medium filter of adopting at present, or fiber ball filter is processed, while adopting these equipment to process, pollutant in water all adsorbs screening throttling by filter core, after filtrate is saturated, carries out backwash, and when backwash, pollutant separates from filter core under stirring action again.After long-time filtration treatment, filter core is prone to and hardens, and oil slick is also difficult for discharging in time, and poor filtration effect, finally causes processing water not up to standard, needs to change in time filtrate, has improved use cost.

Summary of the invention

Based on the deficiencies in the prior art, main purpose of the present invention be to provide a kind of can be by the effluent filter of the greasy dirt in sewage and the processing of suspended impurity separating purification.

The invention provides a kind of effluent filter, comprise tank body, described tank body is provided with water inlet pipe, oil drain out and recoil outlet pipe at top, be provided with air inlet pipe, outlet pipe and blow-off pipe in the bottom of tank body, wherein, in described tank body, also further comprise Multistage filtering device, first order filter is located at the top of second level filter, sewage is imported by water inlet pipe, after first order filter filters, greasy dirt floats up to oil drain out and derives, and the sewage of degreasing is discharged by outlet pipe after second level filter filters.

Preferably, described first order filter comprises coalescing-plate and water distributing plate, and coalescing-plate perisporium is attached on the inwall of tank body, assembles for the oil droplet to sewage, and water distributing plate is installed in the top of coalescing-plate, so that sewage is imported in coalescing-plate and to be filtered equably.

Preferably, described second level filter is the some groups of filter membranes that are parallel to each other, and one end of described filter membrane is communicated with outlet pipe, sewage via second level filter filtration, purification after, derived by outlet pipe.

Preferably, described air inlet pipe is communicated with outlet pipe, and in the time of backwash, gas is exported by air inlet pipe, via after outlet pipe gas distribution, filter membrane being carried out to backwash.Described water inlet pipe is T-shaped structure, offers a plurality of water inlets in water side.

Compared with prior art, a kind of effluent filter of the present invention arranges dual stage filter apparatus, first coalescentization of greasy dirt in sewage is separated and is extracted, and has avoided pollution filter membrane, outlet pipe etc. being caused due to greasy dirt, being difficult to of causing cleans, and reduces the phenomenon such as flux reduction of filter membrane; By filter membrane, the impurity in sewage is purified, the impurity of suspension class is flocked on to the surface of filter membrane, sewage is after filtering discharged by outlet pipe again.Like this, through two-step purification operation, according to the feature of different filters, respectively sewage is carried out to classification processing, both can avoid the pollution of greasy dirt to pipeline and filter membrane, reduce the cost that cleaning filter is safeguarded, also obviously improve efficiency and the quality of sewage purification.In addition, air inlet pipe is connected with outlet pipe, has simplified circuit design, in backwash process, can carry out backwash operation by outlet pipe importing water purification or gas to filter membrane as required.Water inlet pipe adopts inverted T shape design, and more water inlet imports sewage, reduces the flow velocity of sewage, improves and purifies quality.

Accompanying drawing explanation

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

Fig. 2 is the filtration condition figure of a kind of effluent filter of the present invention;

Fig. 3 is the backwash state diagram of a kind of effluent filter of the present invention.

The specific embodiment

Shown in Fig. 1, the invention provides a kind of effluent filter, comprise tank body 1, described tank body 1 is provided with water inlet pipe 10 at top, oil drain out 11 and recoil outlet pipe 12, be provided with air inlet pipe 13 in the bottom of tank body 1, outlet pipe 14 and blow-off pipe 15, wherein, in described tank body 1, also further comprise Multistage filtering device 16, first order filter 160 is located at the top of second level filter 161, sewage is imported by water inlet pipe 10, after first order filter 160 filters, greasy dirt floats up to oil drain out 11 and derives, the sewage of degreasing is discharged by outlet pipe 14 after second level filter 161 filters.

Described water inlet pipe 10 is opened in the top of tank body 1, it is inverted T shape, for introducing sewage to be filtered, offer a plurality of water inlets 101 in the water side of water inlet pipe 10, described each water inlet 101 is in one line, and the sewage of introducing from the water inlet end of water inlet pipe 10 is imported in the cavity of tank body 1 by a plurality of water inlets 101 of water side.Described oil drain out 11 and recoil outlet pipe 12 are all arranged at the top of tank body 1, and wherein, oil drain out 11 is for the greasy dirt of effluent sewerage, the sewage of recoil outlet pipe 12 when discharging backwash.

In tank body 1, dual stage filter apparatus is installed, comprise first order filter 160 and second level filter 161, wherein, described first order filter 160 comprises coalescing-plate 160a and water distributing plate 160b, first the greasy dirt in sewage is carried out to coalescent coarse filtration by first order filter 160, described coalescing-plate 160a is corrugated porous filter plate, perisporium is attached on the inwall of tank body 1, for the oil droplet of sewage is assembled and separating treatment, the width of described coalescing-plate 160a equals the internal diameter of tank body 1, by strengthening the surface area of separation equipment, shorten the distance of oil droplet buoyance lift, improve the stability of current, improve water-oil separating efficiency.Described water distributing plate 160b is installed in the top of coalescing-plate 160a, in first order filter 160, greasy dirt is carried out to pretreatment, the sewage being imported by water inlet pipe 10, flow into equably coalescing-plate 160a from water distributing plate 160b, oil droplet large in sewage is by the coalescence effect of coalescing-plate 160a, form larger oil droplet and float up to the water surface, then by oil drain out 11, greasy dirt is discharged.

Described second level filter 160b is the some groups of filter membranes that are parallel to each other, and one end of described filter membrane is communicated with outlet pipe 14, perpendicular with outlet pipe 14, and in the present embodiment, described filter membrane is made as 3.The sewage of being derived by coalescing-plate 160a, through first order filter 160a, oil droplet is carried out after coalescent extraction, enter second level filter 160b and carry out impurity purified treatment, the floating knot of impurity in sewage is on filter membrane, and the sewage after purified treatment is discharged recovery by outlet pipe 14.

Described air inlet pipe 13 is arranged at the below of tank body 1, and it is connected with outlet pipe 14, for importing gas at backwash process to tank body, filter membrane is carried out to backwash operation, and the impurity depositing on filter membrane is rinsed.Described blow-off pipe 15 is located at the bottom of tank body 1, after filtering, opens blow-off pipe 15 and sewage can be discharged from tank body 1.

Be elaborated to adopting effluent filter of the present invention to filter with the process of backwash below.

Shown in Fig. 2, in filter process, first, carry out greasy dirt pretreatment, import sewage by water inlet pipe 10, usually, in sewage, contain greasy dirt and suspension, sewage is flowed in coalescing-plate 160a equably by water distributing plate 160b, in coalescing-plate 160a, oil droplet is constantly coalescent, changes from small to big and gradually pools larger oil droplet, float up to the water surface, then take out and draw and discharge by oil drain out 11; Next, impurity is carried out to filtration, purification, the sewage after filtering greasy dirt flows into tank body below by coalescing-plate 160a and flows in filter membrane, by constantly flowing inside and outside filter membrane, impurity is flocked on filter membrane, and the sewage after filtration, purification, flows as derived in outlet pipe 14 along pipeline in filter membrane.Below sewage in, as also, with greasy dirt, because oily proportion is less, it also can slowly float up on coalescing-plate, from oil drain out 11 derive.Can complete the separating treatment of greasy dirt and impurity, avoid greasy dirt to be flocked on filter membrane, outlet pipe, inner tank wall etc., have improved quality and the efficiency of sewage purification greatly, have reduced the clean and maintenance cost to filter.

Filter is after operation a period of time, and filter membrane surface tends to form one deck cake layer, causes the flux of filter membrane to reduce, and needs periodic cleaning totally to come into operation again.Shown in Fig. 3, the backwash process of described effluent filter, can adopt water recoil, gas recoil or air water to combine the various ways such as recoil.When water recoil, in filter membrane, pour clear water by delivery port 14; When gas recoil, blast air by air blast from air inlet pipe 13 to filter membrane, via after outlet pipe 14 gas distributions, filter membrane being carried out to backwash, by water or the gas of recoil, cake layer coalescent on filter membrane is rinsed and come off, and the sewage after backwash is discharged by the recoil outlet pipe 12 at tank body top.

Claims

1. an effluent filter, comprise tank body, described tank body is provided with water inlet pipe, oil drain out and recoil outlet pipe at top, be provided with air inlet pipe, outlet pipe and blow-off pipe in the bottom of tank body, it is characterized in that: in described tank body, also further comprise Multistage filtering device, first order filter is located at the top of second level filter, sewage is imported by water inlet pipe, after first order filter filters, greasy dirt floats up to oil drain out and derives, and the sewage of degreasing is discharged by outlet pipe after second level filter filters.

2. effluent filter according to claim 1, is characterized in that: described first order filter comprises coalescing-plate, and its perisporium is attached on the inwall of tank body, assembles for the oil droplet to sewage.

3. effluent filter according to claim 2, is characterized in that: described first order filter also comprises water distributing plate, and it is installed in the top of coalescing-plate, so that sewage is imported in coalescing-plate and to be filtered equably.

4. effluent filter according to claim 2, is characterized in that: described second level filter is the some groups of filter membranes that are parallel to each other, and one end of described filter membrane is communicated with outlet pipe, sewage via second level filter filtration, purification after, derived by outlet pipe.

5. effluent filter according to claim 4, is characterized in that: described air inlet pipe is communicated with outlet pipe, and in the time of backwash, gas is exported by air inlet pipe, via after outlet pipe gas distribution, filter membrane being carried out to backwash.

6. effluent filter according to claim 1, is characterized in that: described water inlet pipe is T-shaped structure, offers a plurality of water inlets in water side.

7. effluent filter according to claim 2, is characterized in that: described coalescing-plate is corrugated porous filter plate.

8. effluent filter according to claim 3, is characterized in that: the width of described coalescing-plate equals the internal diameter of tank body.