CN101830533B

CN101830533B - V-shaped air floating filter with deslagging function

Info

Publication number: CN101830533B
Application number: CN2010101870649A
Authority: CN
Inventors: 马军; 邹景
Original assignee: Harbin Institute of Technology Shenzhen
Current assignee: Harbin Institute of Technology Shenzhen
Priority date: 2010-05-31
Filing date: 2010-05-31
Publication date: 2011-12-21
Anticipated expiration: 2030-05-31
Also published as: CN101830533A

Abstract

A V-shaped air flotation filter with slag discharge function relates to a water quality treatment structure of a water purification plant, in particular to a V-shaped air flotation filter. The present invention aims to solve the problem that the hydraulic load of the filter in the existing air flotation filter is not easy to match with the higher hydraulic load of the air flotation tank, the scum in the scum layer during backwashing cannot be completely washed away, and the filter material layer runs away. The problem of mixed phenomenon of material or filter material. The main bodies of the four V-shaped air flotation filters of the present invention are symmetrically arranged on both sides of the water inlet distribution tank, and the partition wall divides the top of each filter into an air flotation contact area and an air flotation separation area. The air-water chamber, filter plate support frame, filter plate, long handle filter head, gravel support layer and quartz sand homogeneous filter material are arranged on the top, and the slag discharge tank is set on the side wall opposite to the partition wall, and the slag scraper passes through The track is connected with the side wall of the filter tank, and the microbubble generating device is connected with the main pipe for conveying the dissolved air water. The invention is especially suitable for the upgrading and transformation of the old water works which have adopted the V-shaped filter tank.

Description

V-type Airfloat filtering pond with deslagging function

Technical field

The present invention relates to a kind of water treatment plant water treatment structures, be specifically related to a kind of V-type Airfloat filtering pond with deslagging function.

Background technology

At present, water treatment plant often adopts the technology of filtering after the first air supporting when handling high algae water or low temperature and low turbidity water.Existing water treatment building with flotation tank and mobile cover filter tank, conventional rapid filter or being combined into one of flap valve filter tank is because all there is weak point separately in these multi-form Airfloat filtering pond self structure and methods of operation.Air supporting mobile cover filter tank, when its mobile cover operation is carried out backwash to the filter tank, big especially to the disturbance of water surface scum layer, it is stable to influence scum silica frost, and the slag that falls of generation blocks the filter tank filter material layer, reduces and produces water hydraulic load and effluent quality, shorten backwashing period, for the separating effect that guarantees flotation tank also needs the extra filter tank filtering layer that increases with headwater depth,, be difficult for arranging in pairs or groups with the higher hydraulic load of flotation tank simultaneously because the hydraulic load in mobile cover filter tank own is less; The air supporting conventional rapid filter, because the hydraulic load of conventional rapid filter is lower, be difficult for arranging in pairs or groups with the higher hydraulic load of flotation tank, make its floor space bigger, the capital expenditure height, the slag that water surface scum layer produces is fallen on the filtrate, block the filter tank filter material layer, owing to can only carry out backwash for water, when backwash intensity was hanged down, it was clean to fall the slag backwash to the air supporting scum layer on the filter material layer, when backwash intensity is big, both wasted a large amount of backwash water, and it adopts central rhone draining to cause easily that again filter material layer runs material, for the separating effect that guarantees flotation tank also needs the extra filter tank filter material layer that increases with headwater depth; Air supporting flap valve filter tank, the scum layer on water layer surface easily produces slag and falls to the filter tank filter material layer, blocks even penetrates filter material layer, makes the water outlet water quality deterioration, the backwash cycle shortens, though adopt air water associating backwash, because backwash waste adopts the batch-type draining, the filtrate of filter material layer can run in a large number expects to the filtrate intake chamber, and falling slag, scum layer can't be rinsed out up hill and dale, the multilayer filtrate that it adopts the filtrate ginseng often occurs and mixes phenomenon during backwash, have a strong impact on the normal filtration effect in filter tank.

Summary of the invention

The objective of the invention is in order to solve in the existing Airfloat filtering pond, the filter tank hydraulic load is difficult for arranging in pairs or groups with the higher hydraulic load of flotation tank, floor space is big, during backwash, the falling slag and can not be fallen of scum layer by cleaning down, the problem that filter material layer runs material or the mixed phenomenon of filtrate ginseng also occurs, and then a kind of V-type Airfloat filtering pond with deslagging function is provided.

Technical scheme of the present invention is: the present invention includes four V-type Airfloat filtering pond main bodys, water inlet pipe, static mixer, water inlet pneumatic diaphragm valve; sharp-crested weir; V-type filter tank water inlet distributing trough; dissolved air water carrier pipe assembly; dissolved air water is carried and is responsible for; V-type groove; draining valve; H shape cell body; air water chamber; trapped well; effluent weir; clear water pipe; backwash air inlet pipe and backwash water inlet pipe; it also comprises Slag Scraping Device; ash pit; scum pipe and micro bubble generation device; described four areas equate and cross section is " protruding " the V-type Airfloat filtering pond main body of shape is symmetricly set in the both sides of V-type filter tank water inlet distributing trough, the protuberance of " several " shape barricade of the V-type Airfloat filtering pond main body of per two symmetries is relative, partition wall in the V-type Airfloat filtering pond main body is arranged between " several " shape barricade and the sidewall relative with it, between " several " shape barricade and partition wall, be provided with sharp-crested weir, the below at each " several " shape barricade middle part respectively is provided with two water inlet pneumatic diaphragm valves, the middle part of each V-type Airfloat filtering pond main body is provided with the H shape cell body of perforation in the direction perpendicular to partition wall, the intermediate membrane of H shape cell body is divided into the tank on top and the central air water distributing trough of bottom with H shape cell body, draining valve downward-sloping near an end of partition wall and bottom partition wall is connected on the intermediate membrane of H shape cell body, be provided with the air water chamber from the bottom to top in each V-type Airfloat filtering pond main body, the filter plate bracing frame, filter plate, a plurality of strainer heads, gravel supporting layer and quartz sand homogeneous filtering material layer, the upper surface of quartz sand homogeneous filtering material layer is positioned at the below of the upper surface of H shape cell body, described a plurality of strainer head is uniform and vertically pass filter plate and filter plate bracing frame, on the partition wall between the air water chamber of H shape cell body and its both sides, be respectively arranged with air distribution hole and water square hole laterally uniform and that connect down, the top of two relative sidewalls is provided with the V-type groove parallel with H shape cell body in each V-type Airfloat filtering pond main body, V-type groove bottom is evenly equipped with the V-type groove and sweeps and wash the inlet opening, the top of the quartz sand homogeneous filtering material layer in each V-type Airfloat filtering pond main body is the flotation separation zone, a plurality of dissolved air water pipe tops that vertically are set up in parallel communicate and become dissolved air water carrier pipe assembly, dissolved air water carrier pipe assembly is arranged between the partition wall and sharp-crested weir of each V-type Airfloat filtering pond main body, four dissolved air water carrier pipe assemblies are all carried to be responsible for a dissolved air water and are communicated, dissolved air water carrier pipe assembly constitutes the air supporting contact zone, into water space is left in the bottom surface of air supporting contact zone and V-type Airfloat filtering pond main body, the air supporting contact zone communicates with the flotation separation zone by the water inlet of partition wall top, static mixer is arranged in the water inlet pipe, water inlet pipe is communicated with an end of V-type filter tank water inlet distributing trough, one end of backwash air inlet pipe and backwash water inlet pipe inserts the central air water distributing trough of each V-type Airfloat filtering pond main body respectively, the other end of backwash air inlet pipe links to each other with the air blast machine room, the other end of backwash water inlet pipe links to each other with water pump, two trapped wells are symmetricly set in the V-type Airfloat filtering pond outside, the both sides of trapped well communicate with the central air water distributing trough of adjacent two V-type Airfloat filtering pond main bodys respectively by pipeline, two effluent weirs are vertically installed in the trapped well, the clear water pipe is arranged on the sidewall of two trapped wells between the effluent weir, described ash pit is arranged on the sidewall relative with partition wall in the V-type Airfloat filtering pond main body, ash pit is perpendicular to the V-type groove and be positioned at its top, the bottom of ash pit is interlinked to the outside by scum pipe and V-type Airfloat filtering pond pond, Slag Scraping Device is connected with the sidewall of V-type Airfloat filtering pond main body by the track of both sides, Slag Scraping Device is parallel to ash pit and position thereon, and described micro bubble generation device and dissolved air water are carried to be responsible for and linked to each other.

The present invention has following beneficial effect: first, V-type filter tank hydraulic load is higher, can well arrange in pairs or groups with the flotation tank of higher hydraulic load and use the advantage that also can give full play to the high hydraulic load of flotation tank, solved the elevation connection problem in flotation tank and V-type filter tank, and further reduce the structures floor space, guarantee the safety and stability of effluent quality, adopt biphase gas and liquid flow mixing air dissolved pump to produce the mode of microbubble simultaneously, reach and carry the high yield water hydraulic load; The second, V-type filter tank filter material layer can reach 2.0m～2.5m with headwater depth, can guarantee the separating effect that air supporting is handled well, does not need additionally to increase filter material layer with headwater depth, and this point is specially adapted to adopt the old water factory in V-type filter tank to carry out the transformation of Airfloat filtering pond; The 3rd, the average filtrate is adopted in the V-type filter tank, and filter material layer is thicker, does not have the phenomenon that the filtrate ginseng is mixed during backwash, guarantees effluent quality effectively; The 4th, the V-type filter tank adopts air water associating backwash to add its unique surface sweep washing again, can save a large amount of backwash water yields on the one hand, lasting always on the other hand surface sweep washing can produce water surface air supporting scum layer on filter material layer the slag that falls is swept wash clean, the obstructing problem of perforation collector pipe/plate of having avoided the air supporting scum layer to fall slag and having caused, guarantee the backwash effect in filter tank, prolonged the filter tank backwash cycle, guaranteed the filter tank effluent quality; The 5th, can realize two kinds of switchings between technology of air supporting-filter and filter by adding V-type groove water inlet gate valve, to adapt to the variation that water quality types such as high algae, high turbid and low-temperature and low turbidity alternately appear in a year in the pending water water quality of water treatment plant, its scope of application is strengthened.The present invention has simplified the production management flow process, optimizes the water-purifying process flow process, has reduced investment and operating cost, saves cost.

Description of drawings

Fig. 1 is plane of the present invention (schematic diagram of illustrated four V-type Airfloat filtering pond main bodys for being dissectd by the differing heights level); Fig. 2 is the A-A profile of Fig. 1; Fig. 3 is the B-B profile of Fig. 1; Fig. 4 is that the present invention filters the operating mode schematic diagram; Fig. 5 is a backwash operating mode schematic diagram of the present invention; Fig. 6 is the structural representation of trapped well among the present invention; Fig. 7 is the F-F profile of Fig. 6; Fig. 8 is the partial enlarged drawing E of V-type groove among the present invention among Fig. 3; Fig. 9 is a micro bubble generation device structural representation of the present invention.

The specific embodiment

The specific embodiment one: the V-type Airfloat filtering pond that present embodiment is described in conjunction with Fig. 1 to Fig. 9 with deslagging function, it comprises four V-type Airfloat filtering pond main bodys 11, water inlet pipe 1, static mixer 2, water inlet pneumatic diaphragm valve 11-16-1; sharp-crested weir 4; V-type filter tank water inlet distributing trough 6; dissolved air water carrier pipe assembly 7; dissolved air water is carried and is responsible for 7-1; V-type groove 11-1; draining valve 11-1-3; H shape cell body 11-7; air water chamber 11-14; trapped well 8; effluent weir 8-1; clear water pipe 8-2; backwash air inlet pipe 12 and backwash water inlet pipe 13; it also comprises Slag Scraping Device 11-15; ash pit 11-8; scum pipe 11-9 and micro bubble generation device 10; described four areas equate and cross section is " protruding " the V-type Airfloat filtering pond main body 11 of shape is symmetricly set in the both sides of V-type filter tank water inlet distributing trough 6, the protuberance of " several " shape barricade 11-16 of the V-type Airfloat filtering pond main body 11 of per two symmetries is relative, partition wall 11-17 in the V-type Airfloat filtering pond main body 11 are arranged between " several " shape barricade 11-16 and the sidewall relative with it, between " several " shape barricade 11-16 and partition wall 11-17, be provided with sharp-crested weir 4, the below at each " several " shape barricade 11-16 middle part respectively is provided with two water inlet pneumatic diaphragm valve 11-16-1, the middle part of each V-type Airfloat filtering pond main body 11 is provided with the H shape cell body 11-7 of perforation in the direction perpendicular to partition wall 11-17, the intermediate membrane 11-7-3 of H shape cell body 11-7 is divided into the tank 11-7-1 on top and the central air water distributing trough 11-7-2 of bottom with H shape cell body 11-7, the intermediate membrane 11-7-3 of H shape cell body 11-7 goes up draining valve 11-1-3 downward-sloping near the end of partition wall 11-17 and bottom partition wall 11-17 and is connected, be provided with air water chamber 11-14 from the bottom to top in each V-type Airfloat filtering pond main body 11, filter plate bracing frame 11-5, filter plate 11-4, a plurality of strainer head 11-6, gravel supporting layer 11-3 and quartz sand homogeneous filtering material layer 11-2, the upper surface of quartz sand homogeneous filtering material layer 11-2 is positioned at the below of the upper surface of H shape cell body 11-7, described a plurality of strainer head 11-6 is uniform and vertically pass filter plate 11-4 and filter plate bracing frame 11-5, on the partition wall between the air water chamber 11-14 of H shape cell body 11-7 and its both sides, be respectively arranged with air distribution hole 11-11 and water square hole 11-12 laterally uniform and that connect down, the top of two relative sidewalls is provided with the V-type groove 11-1 parallel with H shape cell body 11-7 in each V-type Airfloat filtering pond main body 11, V-type groove 11-1 bottom is evenly equipped with the V-type groove and sweeps and wash inlet opening 11-1-2, the top of quartz sand homogeneous filtering material layer 11-2 in each V-type Airfloat filtering pond main body 11 is flotation separation zone b, a plurality of dissolved air water pipe tops that vertically are set up in parallel communicate and become dissolved air water carrier pipe assembly 7, dissolved air water carrier pipe assembly 7 is arranged between the partition wall 11-17 and sharp-crested weir 4 of each V-type Airfloat filtering pond main body 11, four dissolved air water carrier pipe assemblies 7 all carry person in charge 7-1 to communicate with a dissolved air water, dissolved air water carrier pipe assembly 7 constitutes air supporting contact zone a, into water space is left in the bottom surface of air supporting contact zone a and V-type Airfloat filtering pond main body 11, air supporting contact zone a communicates with flotation separation zone b by the water inlet 11-17-1 of partition wall 11-17 top, static mixer 2 is arranged in the water inlet pipe 1, water inlet pipe 1 is communicated with an end of V-type filter tank water inlet distributing trough 6, one end of backwash air inlet pipe 12 and backwash water inlet pipe 13 inserts the central air water distributing trough 11-7-2 of each V-type Airfloat filtering pond main body 11 respectively, the other end of backwash air inlet pipe 12 links to each other with air blast, the other end of backwash water inlet pipe 13 links to each other with water pump, two trapped wells 8 are symmetricly set in the V-type Airfloat filtering pond outside, the both sides of trapped well 8 communicate with the central air water distributing trough 11-7-2 of adjacent two V-type Airfloat filtering pond main bodys 11 respectively by pipeline, two effluent weir 8-1 are vertically installed in the trapped well 8, clear water pipe 8-2 is arranged on the sidewall of two trapped wells 8 between the effluent weir 8-1, described ash pit 11-8 is arranged on the sidewall relative with partition wall 11-17 in the V-type Airfloat filtering pond main body 11, ash pit 11-8 is perpendicular to V-type groove 11-1 and be positioned at its top, the bottom of ash pit 11-8 is interlinked to the outside by scum pipe 11-9 and V-type Airfloat filtering pond pond, Slag Scraping Device 11-15 is connected with the sidewall of V-type Airfloat filtering pond main body 11 by the track of both sides, Slag Scraping Device 11-15 is parallel to ash pit 11-8 and position thereon, and described micro bubble generation device 10 and dissolved air water are carried and be responsible for 7-1 and link to each other.The space of air supporting contact zone a bottom is the inlet of pending water, contact formation bubble flco with the microbubble following current at the pending water of air supporting contact zone a, the outlet of air supporting contact zone a is located at its top, bubble flco overflow water outlet enters the flotation separation zone b that is positioned at V-type Airfloat filtering pond main body 11 tops, and Slag Scraping Device 11-15 links to each other with numerical control device.Utilize the bigger loss of flood peak of quartz sand homogeneous filtering material layer 11-2, can make the air supporting water outlet water yield and water quality uniform and stable, saved the perforated pipe that catchments, avoided the bubble settling of floccus to block perforated pipe.When filtering, adopts the V-type Airfloat filtering pond constant water level filtering, help the stable of scum silica frost, adopt combined water and air backwash simultaneously with surface sweep washing, the surface sweep washing of Chi Xuing helps the slag that falls is washed to the scum silica frost of filter material surface always, avoid traditional Airfloat filtering pond may problem, the problem includes: the problem that the top layer filtrate blocks easily, effectively prolong the backwashing period in filter tank, save water factory's self water consumption.Simultaneously, the available depth that quartz sand homogeneous filtering material layer 11-2 goes up up to 2m can ensure the dissolved air flotation effect preferably as flotation separation zone b, in order further to improve the hydraulic load of V-type Airfloat filtering pond, can be at the available depth that increases on the basis that increases quartz sand homogeneous filtering material layer on the filter material layer.In addition, because the filter tank filter material layer crosses the water loss of flood peak up to 1.5m～2.0m, avoided adopting perforation collector pipe/plate and air supporting scum layer to fall slag and the obstructing problem of perforation collector pipe/plate of causing.

The specific embodiment two: the V-type Airfloat filtering pond that present embodiment is described in conjunction with Fig. 9 with deslagging function, described micro bubble generation device 10 is by biphase gas and liquid flow air dissolved pump 10-3, knockout drum 10-4, vacuum meter 10-2, Pressure gauge 10-6, pressure-reducing valve 10-7, air bleeding valve 10-5 and draining valve 10-1 form, water-supply-pipe is connected with biphase gas and liquid flow air dissolved pump 10-3 with vacuum meter 10-2 by draining valve 10-1 successively, the end of knockout drum 10-4 is connected with biphase gas and liquid flow air dissolved pump 10-3, the other end of knockout drum 10-4 is connected with pressure-reducing valve 10-7 by Pressure gauge 10-6, and the top of knockout drum 10-4 is provided with air bleeding valve 10-5.The molten gas of micro bubble generation device 10 partly is biphase gas and liquid flow air dissolved pump 10-3, for avoiding air pocket to produce, behind biphase gas and liquid flow air dissolved pump 10-3, add gas-liquid knockout drum 10-4, and through pressure-reducing valve 10-7 decompression generation microbubble, to produce the little and uniform microbubble of sufficient amount, can also save and use the microbubble release that costs an arm and a leg and block easily, avoid the dissolved air release device is overhauled, be convenient to the operational management of regular job and equipment.Other composition of present embodiment is identical with the specific embodiment one with annexation.

The specific embodiment three: the V-type Airfloat filtering pond that present embodiment is described in conjunction with Fig. 1 and Fig. 2 with deslagging function, it also comprises deflection plate 5, described deflection plate 5 is arranged between dissolved air water carrier pipe assembly 7 and the sharp-crested weir 4, the top of deflection plate 5 is fixed on the inwall of V-type Airfloat filtering pond main body 11 top boards, leaves into water space between the base plate of the bottom of deflection plate 5 and V-type Airfloat filtering pond main body 11.Deflection plate 5 is used to change the flow direction of pending water.Other composition of present embodiment is identical with the specific embodiment one or two with annexation.

The specific embodiment four: the V-type Airfloat filtering pond that present embodiment is described in conjunction with Fig. 1 to Fig. 5 with deslagging function, it also comprises V-type groove water inlet gate valve 11-1-1, described partition wall 11-17 goes up and V-type groove 11-1 joint is provided with V-type groove water inlet, V-type groove water inlet is positioned at the top of V-type groove 11-1 upper surface, and the outside of V-type groove water inlet is provided with V-type groove water inlet gate valve 11-1-1.Unlatching by control V-type groove water inlet gate valve 11-1-1 realizes two kinds of switchings between treatment process are filtered and filtered in air supporting one, to adapt to alternately changing of pending water water quality.Other composition of present embodiment is identical with the specific embodiment one, two or three with annexation.

Operation principle of the present invention: when high algae water or low temperature and low turbidity water air-float filtration; Close earlier V-type groove water inlet gate valve 11-1-1; One end of water inlet pipe 1 links to each other with sedimentation basin; Its other end communicates with V-type filter tank water inlet distributing trough 6; The pending water that static mixer 2 mixes in water inlet pipe 1 is by V-type filter tank water inlet distributing trough 6; Pending water is earlier by the moving diaphragm valve 11-16-1 of influent gas; Sharp-crested weir 4 and deflection plate 5 uniform distributions enter four V-type Airfloat filtering pond main bodys 11; The dissolved air water that is formed by biphase gas and liquid flow air dissolved pump 10-3 and knockout drum 10-4 produces the little and uniform microbubble of capacity through pressure-reducing valve 10-7 decompression; The microbubble that produces contacts formation bubble flco in contact zone of dissolved air flotation a bottom with the pending water collision that enters; Upwards the flow through contact zone of dissolved air flotation a outlet of bubble flco enters flotation separation zone b; The bubble flco rises to the surface in flotation separation zone b separation and forms scum silica frost; The scum silica frost that forms is scraped to ash pit 11-8 and through scum pipe 11-9 by the Slag Scraping Device 11-15 that is located at V-type Airfloat filtering pond main body 11 tops and is regularly discharged; Water after air supporting is processed is through the quartz sand homogeneous filtering material layer 11-2 of V-type Airfloat filtering pond main body 11; Gravel supporting layer 11-3; Filter plate 11-4 and a plurality of strainer head 11-6 flow into the air water chamber 11-14 of bottom, filter tank; Import central air water distributing trough 11-7-2 through water square hole 11-12 again, finally by by trapped well 8; Effluent weir 8-1; Clear water pipe 8-2 flow to next processing structures or uses for the user.

When pending water water quality is not suitable for adopting air supporting to handle, filtration such as high muddy water, with pending water through coagulation, the post precipitation water outlet enters V-type filter tank water inlet distributing trough 6 by water inlet pipe 1, open V-type groove water inlet gate valve 11-1-1 earlier, do not start micro bubble generation device 10, through the pending water of mixed flocculation again through pneumatic diaphragm valve 11-16-1; sharp-crested weir 4 and deflection plate 5 uniform distributions enter into the air supporting contact zone a of four V-type Airfloat filtering pond main bodys 11; enter V-type groove 11-1 via V-type groove water inlet gate valve 11-1-1 again; sweep by the V-type groove of V-type groove 11-1 bottom and wash inlet opening 11-1-2 water outlet and the overflow of groove top evenly enters the filter tank; then by quartz sand homogeneous filtering material layer 11-2; gravel supporting layer 11-3; filter plate 11-4 and a plurality of strainer head 11-6 flow into the air water chamber 11-14 of bottom, filter tank; import central air water distributing trough 11-7-2 through water square hole 11-12 again, at last via trapped well 8; effluent weir 8-1; clear water pipe 8-2 flow to next and handles structures or use for the user.

Before the backwash of V-type Airfloat filtering pond, for preventing the destruction of backwash to scum silica frost, with Slag Scraping Device 11-15 the scum silica frost on surface, filter tank is struck off, turn the into open degree of water pneumatic diaphragm valve 11-16 simultaneously down, making inflow satisfy V-type groove 11-1 bottom V-type groove just sweeps and washes inlet opening 11-1-2 institute water requirement, open V-type groove water inlet gate valve 11-1-1 and a part of pending water is swept by the V-type groove wash inlet opening 11-1-2 and enter the filter tank, opening water discharge valve 11-1-3 discharges until the filter tank water surface with the top of rhone 11-7 equal through rhone 11-7 the water of filter material surface then.V-type Airfloat filtering pond backwash process is as follows: the first step, start air blast, open intake valve, air evenly enters the bottom of V-type Airfloat filtering pond main body 11 via the air distribution hole 11-11 of backwash air inlet pipe 12, central air water distributing trough 11-7-2, by a plurality of strainer head 11-6 ejections, the gas of ejection is sheared the impurity on filter material layer surface and is cleaned and be suspended in the filter material layer surface; Sweep by V-type groove 11-1 bottom V-type groove in addition and wash inlet opening 11-1-2 and continue to intake to the filter tank, the lateral current that produces on the filter material layer surface forms surface sweep washing, lateral current is pushed impurity to rhone 11-7-1, start water pump simultaneously, open the backwash water intaking valve, this moment, empty G﹠W entered central air water distributing trough 11-7-2 via backwash water inlet pipe 13 simultaneously, evenly enter air water chamber 11-14 through air distribution hole 11-11 and water square hole 11-12 respectively again, enter filter material layer through a plurality of strainer head 11-6 again, filtrate is further washed, simultaneously, surface sweep washing is still proceeded; Second step, close backwash intake valve 12-1, stop gas and dash, separately water backwash a few minutes again, add the surface sweep washing that always continues, the impurity that will be suspended in the filter material layer surface at last all pours rhone 11-7-1.Wherein gas is towards intensity 15L/ (sm ²), water is 6L/ (sm towards intensity ²), laterally sweeping and washing intensity is 1.8L/ (sm ²).

Scale is 70,000 m ³The V-type Airfloat filtering pond of/d with deslagging function, the upflow velocity of pending water is 20mm/s in the flotation tank contact zone a, air water time of contact is 1.5min, the downward flow velocity of pending water is 3mm/s in the b of flotation separation zone, and the disengaging time of bubble flco and water is 15min, filtering velocity 10.8m/h, backwashing period 48h, the length of four V-type Airfloat filtering pond main bodys 11 is respectively 3.5m, the wide 9.7m that is respectively, and floor space is 33.95m altogether ², get of the molten gas water inlet of filter back water as biphase gas and liquid flow air dissolved pump 10-3, reflux ratio is regulated in 8%～12% scope, and wherein, the particle diameter of quartz sand is 0.95～1.35mm, nonuniformity coefficient K ₈₀=1.0～1.3.

Claims

1. A V-type air flotation filter with slagging function, it comprises four V-type air flotation filter main bodies (11), water inlet pipe (1), static mixer (2), water inlet pneumatic diaphragm valve ( 11-16-1), thin-walled weir (4), V-shaped filter inlet distribution tank (6), dissolved air water delivery pipe assembly (7), dissolved air water delivery main pipe (7-1), V-shaped tank (11-1), drain valve (11-1-3), H-shaped tank body (11-7), air-water chamber (11-14), water seal well (8), water outlet weir (8-1), Clear water pipe (8-2), backwash air intake pipe (12) and backwash water inlet pipe (13), are characterized in that: it also includes scraper (11-15), slag discharge tank (11-8), discharge The slag pipe (11-9) and the microbubble generating device (10), the four V-shaped air flotation filter main bodies (11) with the same area and a "convex" shape in cross-section are symmetrically arranged on the inlet of the V-shaped filter. On both sides of the water distribution tank (6), the protrusions of the "several" shaped retaining walls (11-16) of every two symmetrical V-shaped air flotation filter main bodies (11) are opposite, and the V-shaped air flotation filter main body ( 11) The inner partition wall (11-17) is arranged between the "several" shaped retaining wall (11-16) and the opposite side wall, between the "several" shaped retaining wall (11-16) and the partition wall (11 -17) is provided with a thin-walled weir (4), and two water inlet pneumatic diaphragm valves (11-16-1) are respectively arranged below the middle part of each "several" shaped retaining wall (11-16), each V The middle part of the type air flotation filter main body (11) is provided with a through H-shaped tank body (11-7) in the direction perpendicular to the partition wall (11-17), and the middle partition of the H-shaped tank body (11-7) (11-7-3) The H-shaped tank body

(11-7) is divided into the upper tank (11-7-1) and the lower central air-water distribution tank (11-7-2), the middle partition (11-7) of the H-shaped tank body (11-7) -3) The end close to the partition wall (11-17) is inclined downward and connected with the drain valve (11-1-3) at the bottom of the partition wall (11-17), each V-shaped air flotation filter main body (11 ) is provided with an air-water chamber (11-14), a filter plate support frame (11-5), a filter plate (11-4), a plurality of long handle filter heads (11-6), and a gravel support layer from bottom to top (11-3) and quartz sand homogeneous filter material layer (11-2) the upper surface of quartz sand homogeneous filter material layer (11-2) is positioned at the below of the upper end face of H shape groove body (11-7), so A plurality of long-handled filter heads (11-6) are evenly distributed and vertically pass through the filter plate (11-4) and the filter plate support frame (11-5), and the H-shaped tank body (11-7) and the air-water on both sides The upper and lower parts of the partition wall between the chambers (11-14) are respectively provided with air distribution holes (11-11) and water square holes (11-12) that are horizontally evenly distributed and penetrated. The main body of each V-shaped air flotation filter (11) A V-shaped groove (11-1) parallel to the H-shaped groove body (11-7) is arranged above the two opposite side walls, and V-shaped grooves (11-1) are evenly distributed on the bottom of the V-shaped groove (11-1) Sweeping the inlet holes (11-1-2), the top of the quartz sand homogeneous filter material layer (11-2) in each V-shaped air flotation filter main body (11) is the air flotation separation zone (b), The tops of a plurality of vertically juxtaposed dissolved air pipes communicate to form a dissolved air water delivery pipe assembly (7), and the dissolved air water delivery pipe assembly (7) is arranged on the partition wall (11) of each V-shaped air flotation filter main body (11). -17) and the thin-walled weir (4), four dissolved air water delivery pipe assemblies (7) communicate with a dissolved air water delivery main pipe (7-1), and the dissolved air water delivery pipe assembly (7) constitutes an air The flotation contact zone (a), the air flotation contact zone (a) and the bottom surface of the V-shaped air flotation filter main body (11) leave a water inlet gap, and the air flotation contact zone (a) passes through the top of the partition wall (11-17) The water inlet (11-17-1) communicates with the air flotation separation area (b), the static mixer (2) is arranged in the water inlet pipe (1), and the water inlet pipe (1) is connected to the V-shaped filter inlet water distribution tank (6 ), one end of the backwash inlet pipe (12) and one end of the backwash water inlet pipe (13) are respectively connected to the central air-water distribution tank (11-7-2) of each V-shaped air flotation filter main body (11) , the other end of the backwash inlet pipe (12) is connected with the blower, the other end of the backwash water inlet pipe (13) is connected with the water pump, and two water seal wells (8) are symmetrically arranged on the outside of the V-shaped air flotation filter. Both sides of the well (8) communicate with the central gas-water distribution grooves (11-7-2) of the two adjacent V-shaped air flotation filter main bodies (11) respectively through pipelines, and the two outlet weirs (8-1 ) is vertically arranged in the water seal well (8), and the clean water pipe (8-2) is arranged on the side wall of the water seal well (8) between the two outlet weirs (8-1), and the slag discharge tank ( 11-8) It is arranged in the V-type air flotation filter main body (11) and the partition wall (11- 17) On the opposite side wall, the slag discharge groove (11-8) is perpendicular to the V-shaped groove (11-1) and located above it, and the bottom of the slag discharge groove (11-8) passes through the slag discharge pipe (11-9) It communicates with the outside of the V-type air flotation filter pool, and the slag scraper (11-15) is connected with the side wall of the V-type air flotation filter main body (11) through the rails on both sides, and the slag scraper (11-15) is parallel to The slag discharge tank (11-8) is located on it, and the microbubble generating device (10) is connected with the main pipe for transporting dissolved air water (7-1).

2. The V-type air flotation filter with slagging function according to claim 1, characterized in that: the microbubble generator (10) consists of a gas-liquid two-phase flow dissolved air pump (10-3), a gas-liquid Separation tank (10-4), vacuum gauge (10-2), pressure gauge (10-6), pressure reducing valve (10-7), exhaust valve (10-5) and drain valve (10-1) , the water delivery pipe is connected to the gas-liquid two-phase flow dissolved air pump (10-3) through the drain valve (10-1) and the vacuum gauge (10-2) in turn, and one end of the gas-liquid separation tank (10-4) is connected to the gas-liquid two-phase flow The phase flow dissolved air pump (10-3) is connected, the other end of the gas-liquid separation tank (10-4) is connected with the pressure reducing valve (10-7) through a pressure gauge (10-6), and the gas-liquid separation tank (10-4 ) is provided with an exhaust valve (10-5).

3. The V-type air flotation filter with slagging function according to claim 1 or 2, characterized in that: it also includes a baffle (5), and the baffle (5) is arranged in the dissolved air water Between the conveying pipe assembly (7) and the thin-walled weir (4), the upper part of the baffle (5) is fixed on the inner wall of the top plate of the main body (11) of the V-shaped air flotation filter, and the lower part of the baffle (5) is connected to the There is a water inlet space between the bottom plates of the V-shaped air flotation filter main body (11).

4. The V-shaped air flotation filter with slagging function according to claim 1 or 2, characterized in that: it also includes a V-shaped groove inlet valve (11-1-1), and the partition wall (11 -17) There is a V-shaped groove water inlet at the junction with the V-shaped groove (11-1), the V-shaped groove water inlet is located above the upper end surface of the V-shaped groove (11-1), and the outside of the V-shaped groove water inlet A V-groove water inlet valve (11-1-1) is provided.