CN102755771A

CN102755771A - Multi-stage variable-porosity fiber filter bed and filtering equipment

Info

Publication number: CN102755771A
Application number: CN2011101045951A
Authority: CN
Inventors: 张万友; 苑德春; 吕洪滨; 郗丽娟; 姜山
Original assignee: JILIN TIANYUAN ENVIRONMENTAL PROTECTION ENGINEERING Co Ltd
Current assignee: JILIN TIANYUAN ENVIRONMENTAL PROTECTION ENGINEERING Co Ltd
Priority date: 2011-04-26
Filing date: 2011-04-26
Publication date: 2012-10-31

Abstract

The invention relates to the technical field of water treatment. According to the invention, polypropylene fiber filaments are used for manufacturing fiber filament filter layers. Polypropylene fiber subjected to a puffing treatment is wound into circular fiber filter units with certain diameters. A plurality of filter units are arranged in parallel, such that a filter layer is formed. Filter layers formed by fiber filter units with different diameters are connected by using flexible or rigid apparatuses, such that a multi-stage variable-porosity fiber filter bed is manufactured. The filter bed is fixed in a prepared tank body. An end of a filter layer manufactured by using small-diameter fiber is connected with a fixed water distribution plate. An end of a filter layer manufactured by using large-diameter fiber is a free mobile end. Water subjected to pretreatment can enter from the free mobile end, and is discharged from the fixed water distribution plate end. Under effects of gravity and friction force, filter layer porosity is gradually reduced along a water flow direction, such that an ideal filter stage distribution is formed, and the variable-porosity bed layer is formed. Therefore, pollutants can be received by the integral bed layer. When a pollutant interception capacity of the filter material reaches 10-15kg/m<3>, and a filtering speed is higher than 30m/h, turbidity of discharged water can be below 1NTU, such that the uniformity of high speed and high efficiency is realized.

Description

Multistage change porosity fiber filter bed and filter plant

Technical field

The present invention relates to water-treatment technology field, is a kind of multistage change porosity fiber filter bed and filter, is used for the pollutants such as suspension, iron, manganese and larger molecular organics of filtering water.

Background technology

Filtration is that surface water is handled and the requisite link of sewage recycling process.Traditional filtering material is the hard granular filtrate, comprising: anthracite, quartz sand etc.These filtrate specific areas are little, and the filtering layer porosity is low, and the gravity one retaining power of processing with particulate filter is generally less than 2kg/m ³, the rate of filtration is being more than 3% of water production in periodic mode about 8m/h, from the water consumption.At present, still occupy an leading position in national economy all departments in the filter tank of this form.

Along with expanding economy and social progress, challenge has been proposed traditional water filtration mode.Particulate filter filter technology is being moved flow velocity, effluent quality, more and more is being difficult to satisfy the people's living standard raising to requirements in water quality from aspects such as water consumption, retaining powers; More and more be difficult to adapt to the water body environment that pollutes day by day, more and more be difficult to satisfy the target of energy-saving and emission-reduction under the new situation.

The nineties in last century is on the basis of using for reference the former Soviet Union and Japanese fiber filter technology; The domestic research work that begins the fibre bundle filtration material; On the basis that external Related product is deeply analyzed; Develop the brand-new pressure type fiber bundle filter of a generation, realized the filtering technique qualitative leap.From then on, polypropylene fiber is so that its chemical stability is good, intensity is high, wear-resistant, corrosion resistant performance is used as filtering material and is approved by industry.At present the domestic and international research focus is how to solve high-rate fitration and problem efficiently, researchs and solves the contradictory problems of flow velocity and the cycle of operation and effluent characteristics, simplified apparatus structure problem, problem such as prevent that the filtering layer dirt from blocking up.

Summary of the invention

The objective of the invention is, prior art is carried out substantial improvements, provide a kind of can retaining power big, filter cycle is long, the rate of filtration is fast, filtering accuracy is high, the fiber filter bed and the filter of simple in structure, dependable performance.

The objective of the invention is to realize by following technical scheme; Make the filament filtering layer with a kind of polypropylene fiber silk; It is characterized in that: the polypropylene fiber after expanding treatment that will meet certain requirements is wound in the fibrae circulares filter unit of certain diameter; Be one group with several filter units and form filtering layer that will be connected through flexible connecting device by the filtering layer that the fiber filter element of different-diameter is processed, the two-stage filtering layer forms filter bed at least.It is multistage change porosity fiber filter bed.Filter bed is fixed in the prefabricated pond body, and the filtering layer end that small diameter fibers is processed is connected with fixing water distribution porous plate, and the filtering layer that large-diameter fiber is processed is removable free end.The water that gives processing is got into by removable free end, and fixedly water distribution porous plate end flows out.

Multistage variable porosity fiber filter bed of the present invention, under the gravity and function of friction of water, the fiber filtering layer of different-diameter and different loading densities is different in the relative displacement of compressed while of whole filtering layer; Reduce successively along water (flow) direction filtering layer porosity; Formed desirable filter level and distributed, promptly become hole and consider bed, made whole bed all can be received pollutant; Rather than both surface filtration, realized the in-depth filtration of real meaning.Thereby increased substantially the retaining power (10-15kg/m of filtrate ³Filtrate) and the rate of filtration in filter tank (more than the 30m/h).The high density protective layer that the filter tank port of export forms has been guaranteed effluent characteristics.Can be through fibre diameter, length, the isoparametric adjusting of loading density and optimization be improved the filter tank to the adaptability of different quality and different water quality requirements.Delivery turbidity is controllable within the specific limits; To the feedwater processing occasion, delivery turbidity can be controlled in below the 1NTU, in the sewage recycling field; Two and handle after sewage after this apparatus processes, effluent quality reaches GB18918-2002 one-level A discharge standard or higher water quality requirement.

Multistage variable porosity fiber filter bed of the present invention; Can be applicable to compared with prior art, have simple in structure in the filter tanks such as pressure type filter plant and gravity type siphon filter, valveless filtering pool, V-type filter tank; Retaining power is big; Filter cycle is long, and the rate of filtration is fast, advantages such as filtering accuracy height, dependable performance.

Description of drawings

Fig. 1 is a kind of multistage change porosity fiber filter bed structural representation of embodiment 1.

Fig. 2 cuts open sketch map for a kind of multistage change porosity fiber filter bed and the apparatus structure of embodiment 2

Among the figure: 1 closed loop filament filter unit, 2 fiber filtering layers, 3 connecting rings, 4 jockeys, 5 nets; 6. truss, 7. steamboat, 8. multistage change porosity fiber filter bed, 9 bodies, 10 fixing porous plates; 11 water inlets, 12 cloth tanks, 13 backwashes outlet, 14 manholes; 15a cleans water dispensing apparatus and outlet, and 15b cleans inlet, 16a air distributing device and

air inlet

1,16b air distributing device and air inlet 2.

The specific embodiment

Utilize embodiment shown in the drawings that the present invention is described further below.

Embodiment 1: with reference to Fig. 1, the multistage fiber filter bed of present embodiment is closed loop single-unit filament filter unit 2 by filament 1 winding, and its weight is 0.03-0.05kg, and diameter range is 10-100um, girth 300-1500mm.Some bundle polypropylene fibers are wound in the closed loop filter unit 2 of different-diameter, different length, Different Weight; Adopt connecting ring 3 that the two ends of single-unit closed loop filament filter unit 2 are separately fixed on the jockey (4), connect into the multistage variable porosity fiber filter bed 8 of two-stage at least.Described jockey 4, can be rigidity also can be flexible, its device 4 that is rigidly connected is to be assembled by wire netting 5, skeleton 6 and steamboat 7.Wire netting or nonmetal net 5 are adopted in its flexible connection, do not assemble truss 6 and steamboat 7.

Embodiment 2: with reference to Fig. 2; The gravity type of present embodiment becomes the multistage fiber filter bed filter tank structure of porosity; The water inlet 11 of body 9. on body 9 tops that adopts steel and concrete to make links to each other with rinse water outlet 13 with cloth tank 12; The multistage fiber filter bed 8 that becomes porosity is connected on the fixedly porous plate of body bottom 10, and the clear water water dispensing apparatus is set in the bottom of body 9 and delivery port 15a has three-way pipe to connect rinse water inlet 15b, binary channels

air distributing device

16a and 16b is set below it.

Operation principle: when operation is filtered, open former water inlet 11, the cloth tank 12 of flowing through evenly gets in the filter tank body 9; Under water inlet gravity and function of friction, the fiber filtering layer 8 of different-diameter and different loading densities is different in the relative displacement of compressed while of whole filtering layer, reduces successively along water (flow) direction filtering layer porosity; Formed desirable filter level and distributed, promptly become hole filter bed layer, made whole bed all can be received pollutant; Rather than both surface filtration, realized the in-depth filtration of real meaning.The water that filters flows out from clear water output 15a, realizes filtering operation.During cleaning, open rinse water inlet 15b, open

earlier air inlet

16a or 16b that the antifouling stifled filtering layer in the flexible road of installing body bottom, pond cleans air distributing device simultaneously; Make filter bed open bed, fiber filter element is loose condition (of surface), again through conversion air water flow; Switch flushing channel; Increase the strength of turbulence of filtering layer, thereby the more thorough rinse water of dirty performance recovery of cutting of filtering layer is discharged from rinse water outlet 13, media regeneration is effective.

This multistage variable space filter bed can be conveniently used in various in-depth filtration devices such as the present widely used pressure filter of national economy all departments and gravity type siphon filter, valveless filtering pool, V-type filter tank; And the transformation of each sand filter; The filter tank transformation can be under the prerequisite that does not increase structures, the requirement of satisfying increase-volume and increasing water quality.

Claims

1. multistage change porosity fiber filter bed; Comprise that the polypropylene fiber silk twines the closed loop single-unit filament filter unit (1) that is certain diameter; Form filtering layer (2) side by side with several filter units and adopt connecting ring (3) to connect flexibility or rigidity device (4), process multistage change porosity fiber filter bed (8).The filler that is used for various in-depth filtration devices.

2. multistage change porosity fiber filter bed according to claim 1; It is characterized in that: be closed loop single-unit filament filter unit (1); It is polypropylene filaments through expanding treatment; Its diameter range is 10-100um, and the weight of closed loop single-unit filament filter unit (1) is 0.03-0.05kg, and girth is between 300-1500mm.

3. multistage change porosity fiber filter bed according to claim 1: it is characterized in that: the ring-type that some bundle polypropylene fibers is wound in different-diameter, different length, Different Weight is filtered unit (1), utilizes jockey (4) to connect into the multistage change porosity fiber filter bed (8) of two-stage at least.Filter bed is fixed in the prefabricated pond body, and the filtering layer end that small diameter fibers is processed is connected with fixing water distributing plate, and the filtering layer that large-diameter fiber is processed is for moving freely end, and the water that gives processing gets into fixedly water distributing plate end outflow by can move freely end.

4. the multistage described jockey of change porosity fiber filter bed according to claim 1 (4) is characterized in that: this jockey (4) can be rigidity also can be flexible.

5. according to said this jockey of claim 4 (4), it is characterized in that: it is rigidly connected jockey (4) and is made up of wire netting (5) truss (6) and steamboat (7).Its flexible connection is not assemble the wire netting (5) of truss (6) and steamboat (7) or nonmetal net (5).

6. multistage change porosity fiber filter bed according to claim 1, it is characterized in that: multistage change porosity fiber filter bed (5) is used for the filler of gravity type siphon filter, valveless filtering pool, V-type filter tank and various in-depth filtration devices.

7. the filter tank that multistage change porosity fiber filter bed according to claim 6 is processed; It is characterized in that: the body in the pond (9) bottom design and installation the antifouling stifled filtering layer cleaning device in flexible road (16a, 16b); Through conversion air water flow, switch flushing channel, realize the pulsation cleaning; Increase the strength of turbulence of filtering layer, thereby it is more thorough that filtering layer is cleaned.