CN104944622A - Efficient backwashing-free filtering clarification tank - Google Patents

Abstract

The invention discloses an efficient backwashing-free filtering clarification tank, and belongs to the technical field of water treatment suspended solid precipitation. According to the structure, the efficient backwashing-free filtering clarification tank is generally of a cylindrical structure, an inner cylinder is taken as a reaction chamber, a middle cylinder is taken as a guide chamber, an outer cylinder is taken as a clarification chamber, and suspended filtering devices which consist of non-metallic filtering materials with filtering functions and stirrers with filtering material stirring and washing functions are arranged inside the reaction chamber. The filtering materials consist of smooth flat granules, the stirrers are operated in a non-continuous mode, and the stirring time and the intermittent time can be set up after the water quality characteristics are tested and confirmed. Honeycomb-shaped inclined tubes are mounted inside the clarification chamber, so that the clarification effect can be improved; as compressed air washing devices are mounted at the upper ends of the inclined tubes, the inclined tubes can be periodically washed; compressed air nozzles are arranged in a single-row moveable manner, the inclined tubes can be washed row by row.

Description

A kind of efficiently without backwash filtration settling pond

Art:

The present invention relates to a kind of filtration clarifying equipment for sewage disposal.

Background technology:

At present in engineering of water treatment, clarifying equipment for water treatment mainly contains: mechanical accelerating purifying pool, sludge blanket clarifier and water conservancy Circulation clarifying pool, these three kinds of settling ponds (joint clarified by the 7th chapter 7.3 see Water And Drainage System Design handbook the 3rd-city water one of China Construction Industry Press's publication in 1986).Their clarification principle is respectively: mechanical accelerating purifying pool is by churned mechanically effect, make the sludge backflow in the first reaction chamber and with dosing after former water contact reacts, in the second reaction chamber, continue reaction form larger wadding grain, then entered in clarifying chamber by diversion chamber and carry out precipitate and separate; Sludge blanket clarifier is body refuse suspension contact separation type settling pond.The former water of dosing coagulant, is first separated water outlet hollow gas through air trap, then enters suspension slime layer through bottom perforated water distributing pipe.Original body refuse contact flocculation in steady impurity and pond is taken off in water, adsorbed by slime layer, clear water is upwards separated, former water is purified, suspension body refuse will constantly increase after suspended particle having adsorbed in water, unnecessary body refuse just automatically enters concentration compartments through mudhole, after being concentrated to finite concentration, is discharged by bottom perforated shore pipe.The substantially same accelerator of principle of work of water conservancy Circulation clarifying pool, belongs to sludge circulation type settling pond, and difference is need not machinery but utilize waterpower to carry out mixing and reach sludge circulation backflow under the effect of water-jet.When the former water (after dosing coagulant) with certain pressure is with during at a high speed by water sprayer nozzle, around water sprayer trunnion, forms negative pressure, thus the backflow body refuse being several times as much as former water is sucked trunnion, and fully mix with it.Due to fully the contacting of backflow body refuse and former water, reaction, greatly strengthen the adsorption of particle, accelerate flocculation, to obtain good clarifying effect.Mechanical filter utilizes the contact detention effect of granule filter material to suspended impurity in water to process former water, and its advantage is that treatment effect is good, and effluent quality is high, and shortcoming is that filtrate needs frequent backwash when raw water turbidity height, and the backwash water yield is large.Accelerator Problems existing one is complex structure, and difficulty of construction is large, construction cost is high; Two is that in circulation body refuse, silt content is difficult to realize stability contorting thus makes effluent quality unstable.Sludge blanket clarifier Problems existing is that suspended layer is unstable when flow velocity increases, poor to the adaptability of process water yield change; The spoil disposal water yield is large, water for drainage slurry scale is large, construction cost is high, processing cost is high.Water conservancy Circulation clarifying pool Problems existing sucks trunnion owing to will produce by the jet action of former water the backflow body refuse that negative pressure will be several times as much as former water at the bottom of pond, thus to the pressure requirements of former water higher than the settling pond of other type, make former water power consumption higher.

Summary of the invention:

The object of the invention is to the advantage of comprehensive utilization three kinds of settling ponds and mechanical filter, and overcome their shortcoming by transformation, thus reduce settling pond construction cost and running cost, stablize settling pond effluent quality, reduction water for drainage slurry equipment scale and running cost, facilitate production management.

The technical solution adopted for the present invention to solve the technical problems is based on sludge blanket clarifier, the modification measures taked is: one is arrange suspension filter device in the reaction chamber, it is made up of the agitator of the nonmetal filtrate of filtration and stirring and washing filtrate, nonmetal filtrate shape is smooth flats particulate matter, material used has good adsorptivity and temperature tolerance, and density is at 0.7-0.9g/cm ³between, agitator is discontinuous operation, churning time and intermittent time determine according to water quality characteristics experiment after reset.Two is the mode spoil disposals adopting multibuchet collection mud to combine with collection mud house steward spoil disposal, and multibuchet plays body refuse and concentrates, and sludge pipe plays collection mud and conveying body refuse.Three is be provided with compressed air cleaning device in clarification inclined tube upper end, and periodically clean inclined tube, compressed-air atomizer is that single movable-type is arranged, cleans by row inclined tube.

The invention has the beneficial effects as follows:

One is accelerator and sludge blanket clarifier is lean on the cohesion of circulation body refuse and suspension body refuse and adsorption to carry out clarifying treatment to former water, because its treatment effect is by the impact of the thickness of water flow velocity and body refuse, temperature, concentration, stability, make effluent quality unstable.And the present invention is provided with suspension filter device in reaction chamber, the nonmetal filtrate shape in suspension filter device is smooth flats particulate matter, and material used has good adsorptivity and temperature tolerance, and density is at 0.7-0.9g/cm ³between, stablize constant after such filtrate installs, be very easy to operation to control and production management, improve the adaptability to influent turbidity change, also stabilize effluent quality, especially when raw water turbidity is 80-150PPm, stable adsorption layer cannot be formed with turbidity during settling pond process is too low, with the filter process frequent backwash of the too high needs of turbidity again, running cost is high, and such water quality just novel efficiently can be filtered settling pond without backwash and processes with this.Two be the water ratio of existing accelerator and sludge blanket clarifier spoil disposal up to 95%-98%, the treatment scale of the row's of making muddy-water device and processing costs are all higher.And the mode spoil disposal that the present invention adopts multibuchet collection mud to combine with collection mud house steward spoil disposal, muddy water during each spoil disposal first in drained thickening cone and sludge pipe just has clear water to flow out, the water ratio of such spoil disposal water just drops to 70%-80%, spoil disposal discharge reduction to original less than 20%, thus makes the scale of water for drainage slurry device and processing costs all drop to original less than 25%; Also reduce the height of mud collecting chamber simultaneously.Three is periodically clean honeycomb inclined-tube with pressurized air, prevents because mud deposits in inclined tube and presses the inclined tube that collapses, affecting clarifying effect.

Accompanying drawing illustrates:

Below in conjunction with accompanying drawing, the present invention is further described.

Fig. 1 is suspending clarification pool structure, general flow chart.

Fig. 2 efficiently filters settling pond structure, general flow chart without backwash.

In Fig. 1: 1. water inlet pipe, 2. clear water water leg, 3. mud hole, 4. clear water zone, 5. suspended layer, 6. body refuse concentration compartments, 7. perforated sludge discharge pipe.

In Fig. 2: 1. water inlet pipe, 2. clear water water leg, 3. suspension filter device, 4. stirrer, 5. diversion chamber, 6. honeycomb fashion inclined tube, 7. sludge condensation room, 8. collect mud house steward 9. compressed air cleaning device

Embodiment:

Water inlet manifold enters from the middle and lower part of reaction chamber cone, makes process water tangent line enter reaction chamber by distribution pipe (1).At the middle part of reaction chamber cylindrical portion, suspension filter device is set, suspended filter material is loaded in (3) the device frame shown in Fig. 2, stirrer is installed on the position of piece number (4) in the drawings, after dosing former water after flocculation reaction in reaction chamber on flow through suspension filter device filter after, diversion chamber (5) is entered in overflow, enters bottom, clarifying chamber by diversion chamber bottom.In clarifying chamber, water flows from bottom to top, by the contact separation effect of honeycomb fashion inclined tube (6), clear water flows out settling pond by water outlet distribution trough (2), mud then precipitates downwards and enters sludge condensation room (7), then enters sludge hopper and collection mud house steward (8), finally discharges settling pond, in reaction chamber, sludge hopper and sludge pipe are installed equally, adopt the method periodically spoil disposal of gravity spoil disposal.Be provided with compressed air cleaning device (9) in honeycomb inclined-tube upper end, periodically inclined tube cleaned.

Claims (4)

1. one kind is efficiently filtered settling pond without backwash, it is the settling apparatus for water treatment, it is the technological improvement basis of accelerator, sludge blanket clarifier and mechanical filter principle done in integrated use, it is characterized in that: suspension filter device is set in the reaction chamber, it is made up of the nonmetal filtrate of filtration and the agitator playing the effect of stirring and washing filtrate, in clarifying chamber, with compressed air cleaning device, periodic purge is carried out to inclined tube, adopt the mode spoil disposal that multibuchet concentration compartments combines with collection mud house steward spoil disposal simultaneously.

2. one according to claim 1 efficiently filters settling pond without backwash, it is characterized in that: nonmetal filtrate shape is smooth flats particulate matter, and material used has good adsorptivity and temperature tolerance, and density is at 0.7-0.9g/cm ³between.

3. one according to claim 1 is efficient filters settling pond without backwash, it is characterized in that: agitator is discontinuous operation, churning time and intermittent time according to water quality characteristics test determine after reset.

4. one according to claim 1 efficiently filters settling pond without backwash, it is characterized in that: the compressed-air atomizer of compressed air cleaning device is that single movable-type is arranged, cleans by row inclined tube.