CN104071926B - A kind of V-type filter tank - Google Patents

A kind of V-type filter tank Download PDF

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Publication number
CN104071926B
CN104071926B CN201410331946.6A CN201410331946A CN104071926B CN 104071926 B CN104071926 B CN 104071926B CN 201410331946 A CN201410331946 A CN 201410331946A CN 104071926 B CN104071926 B CN 104071926B
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type filter
filter tank
tank main
water
recoil
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CN104071926A (en
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梁惠敏
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WUXI HUA YAN WATER Co Ltd
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WUXI HUA YAN WATER Co Ltd
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Abstract

<b> the present invention relates to a kind of </b><bGreatT.Gre aT.GTV</b><bGrea tT.GreaT.GT type filter tank, comprise multiple </b><bGreatT.Gre aT.GTV</b><bGrea tT.GreaT.GT type filter tanks main body, water feed apparatus, discharging device, back-purge system, </b><bGreatT.Gre aT.GTV</b><bGrea tT.GreaT.GT type filter tank also comprises the top being positioned at each </b><bGreatT.Gre aT.GTV</b><bGrea tT.GreaT.GT type filter tank main body and the crown wall each </b><bGreatT.Gre aT.GTV</b><bGrea tT.GreaT.GT type filter tank main body closed, to be opened on crown wall and can to enter for people multiple manholes that </b><bGreatT.Gre aT.GTV</b><bGrea tT.GreaT.GT type filter tank main body carries out overhauling, for monitor </b><bGreatT.Gre aT.GTV</b><bGrea tT.GreaT.GT type filter tank main body filter effect and when the filter effect numerical value monitored is lower than the Controlling System that can control back-purge system during set(ting)value and to carry out </b><bGreatT.Gre aT.GTV</b><bGrea tT.GreaT.GT type filter tank main body back flushing.The present invention can avoid direct sunlight </b><bGreatT.Gre aT.GTV</b><bGrea tT.GreaT.GT type filter tank main body completely, and sterilizing agent can more effectively control bacterium and microorganism under closed environment, is also unfavorable for growing of moss.Further, investment and maintaining expense few, overall appearance also very succinctly bright and clear.In addition, Controlling System is convenient to management and is run, and also saves manpower simultaneously, is well suited for the utilization of advanced treatment water factory.</b>

Description

A kind of V-type filter tank
Technical field
the invention belongs to clean water treatment industry, be specifically related to a kind of V-type filter tank.
Background technology
type filter tank full name is AQUAZURV type filter tank, is a kind of rapid filter developed by French Degremont S.A, gains the name because water inlet adopts V-type groove.First latter stage in the sixties adopts in Paris Ao Li water factory, and the seventies widely uses in Europe gradually, successively after state's application such as Italy, Israel, Morocco, Honduras, Venezuela, is subject to various countries' favorable comment, is progressively promoted in the world.Since the eighties, China also recognizes unique developing result of the air-water backwashing technology after external innovation, the air-water backwashing technique of Introduced From Abroad advanced person successively, is widely used in new enlarging water factory.
type filter tank is designed to V-shaped because of both sides (or side also can) inlet flume and gains the name, and is provided with row's aperture at the bottom of pond, intakes when both can be used as to filter, and can sweep the water that washes cloth again during flushing for transverse direction.The principal feature in V-type filter tank is: 1, can adopt compared with the thicker filtering layer of coarse media to increase filtration cycle.Because filtering layer during back flushing does not expand, therefore whole filtering layer is substantially even in the size distribution of depth direction, and hydraulic classification phenomenon does not occur, and i.e. so-called " homogeneous filtering material ", makes filtering layer contain dirty ability and improves.General employing sand filtering material, effective size of grain 0.95-1.50mm, nonuniformity coefficient (1) 2-1.5, the thick about 0.95-1.5m of filtering layer.2, gas, water recoil add the lateral surfaces existed all the time again and sweep and wash, and developing result is good, and washing water quantity greatly reduces.
type filter tank is generally uncovered layout, is convenient to the various running statuses of observing filter grid in real time and intuitively, in time according to running condition adjust operation parameter and technique.Overhaul also more convenient, as long as water emptying is carried out safety prevention measure and can be carried out.But uncovered layout dust is large, and animalcule winged insect flying bird etc. easily enters is drowned, and opened type direct sunlight easily grows moss.And when carrying out depth-averaged model, steel structure canopy or indoor must be done in filter tank, investment maintenance cost is high, and maintenance difficulty is large.The investment cost of steel structure canopy or indoor design is quite high, general about 5 years of steel structure canopy must large-scale maintaining once, and degree-of-difficulty factor is larger.
Summary of the invention
the technical problem to be solved in the present invention is to provide the low V-type filter tank of a kind of maintenance cost.
for solving the problems of the technologies described above, a kind of technical scheme that the present invention adopts is: a kind of V-type filter tank, comprise multiple V-type filter tank main body for filtered water, for the water feed apparatus to each described V-type filter tank main body water inlet, for the discharging device that the clear water after filtration is discharged, for the back-purge system cleaned each described V-type filter tank main body, described V-type filter tank also comprises the top being positioned at each described V-type filter tank main body and the crown wall each described V-type filter tank main body closed, to be opened on described crown wall and can to enter for people multiple manholes that described V-type filter tank main body carries out overhauling, for monitor described V-type filter tank main body filter effect and when the filter effect numerical value monitored is lower than the Controlling System that can control described back-purge system during set(ting)value and to carry out described V-type filter tank main body back flushing.
particularly, described V-type filter tank also comprises multiple cover plates of situation about being opened in the V-type filter tank main body described in described crown wall can being used for observe.
particularly, multiple described V-type filter tank main body is along the symmetrically arranged two groups of V-type filter tank main body groups of symmetry axis, and the bearing of trend of described symmetry axis is vertical with the bearing of trend of each described V-type filter tank main body.
particularly, described water feed apparatus comprises the total canal of water inlet for passing into water to be filtered, be connected with the total canal of described water inlet for the settling tank by described water precipitation to be filtered, the skip-cage combination shaft be connected with described settling tank, be connected with described skip-cage combination shaft for the chemical feed pipe to dosing in described skip-cage combination shaft, be arranged in described skip-cage combination shaft for the stirrer by water to be filtered and medicine mixing, the water inlet distributing canal be connected with described skip-cage combination shaft, multiple influent weirs between described water inlet distributing canal and multiple described V-type filter tank main body, for being communicated with multiple water inlet pneumatic gate valves of described water inlet distributing canal and multiple described influent weir, be opened on described influent weir for being communicated with the prosopyle of the V-type groove of described influent weir and described V-type filter tank main body.
particularly, described discharging device comprise the many exit branch be connected with the clear water output of each V-type filter tank main body, the multiple wet wells be connected with the exit branch described in every root, the outfall sewer be connected with each described wet well, be arranged on described in every root exit branch on Graceful water valve.
more specifically, described multiple wet well and described outfall sewer, between described two groups of V-type filter tank main body groups, each described wet well are provided with the viewing window for observing situation in described wet well.
particularly, described back-purge system comprises recoil inlet manifold, the many recoil air intake branches be connected with described recoil inlet manifold, be arranged on the recoil air valve on the recoil air intake branch described in every root, the multiple gas distribution pipes be connected with the recoil air intake branch described in every root, recoil water inlet manifold, many that are connected with the described recoil water inlet manifold water inlet pipes that recoil, be arranged on the recoil water valve on the recoil water inlet pipe described in every root, the multiple water distributing pores be connected with the recoil water inlet pipe described in every root, blow device for purging the top layer of described filtration body on the sidewall being arranged on described filtration body, the total canal of recoil draining be connected with the total canal of filter back washing of each described V-type filter tank main body, be arranged on the multiple draining pneumatic gate valves between the total canal of filter back washing of described V-type filter tank main body and the described total canal of recoil draining, the water shoot be connected with the described total canal of recoil draining, multiple described gas distribution pipe and multiple described water distributing pore are uniformly distributed along the bearing of trend of described V-type filter tank main body, multiple described gas distribution pipe is arranged on the supporting layer of described V-type filter tank main body, multiple described water distributing pores are arranged on the bottom of described V-type filter tank main body, described recoil inlet manifold and described recoil water inlet manifold are between described two groups of V-type filter tank main body groups.
particularly, described Controlling System comprise the influent turbidity instrument be arranged on described water feed apparatus, the delivery turbidity instrument be arranged on described discharging device, be arranged in described V-type filter tank main body for the ultrasonic liquid leveller of sensed water level, be arranged on described discharging device can reflect filtration situation aperture valve, for controlling the controller of the operation in described V-type filter tank.
particularly, described V-type filter tank also comprises the filtrate to waste pipe of discharging for the water described V-type filter tank main body filtered for the first time that to be connected with each described V-type filter tank main body.
particularly, described water feed apparatus comprises into water pneumatic gate valve, described discharging device comprises Graceful water valve, described back-purge system comprises recoil air valve, recoil water valve, draining pneumatic gate valve, and described V-type filter tank also comprises for the gas-holder to described water inlet pneumatic gate valve, Graceful water valve, recoil air valve, recoil water valve, draining pneumatic gate valve air feed, drying machine and air compressor machine.
scope of the present invention, is not limited to the technical scheme of the particular combination of above-mentioned technical characteristic, also should contain other technical scheme of being carried out arbitrary combination by above-mentioned technical characteristic or its equivalent feature and being formed simultaneously.The technical characteristic that such as, disclosed in above-mentioned feature and the application (but being not limited to) has similar functions is replaced mutually and the technical scheme etc. formed.
because technique scheme is used, the present invention compared with prior art has following advantages: the present invention closes V-type filter tank main body by adopting crown wall, avoid direct sunlight completely, and the sterilizing agent that skip-cage combination shaft remains can more effectively control bacterium and microorganism under closed environment, is also unfavorable for growing of moss.Further, many investments and maintaining expense can be saved without steel structure and interior structure, overall appearance also very bright and clear, succinct.In addition, controlled and monitor the operation of V-type filter tank main body by Controlling System, be convenient to management and run, also saving manpower simultaneously, be well suited for the utilization of advanced treatment water factory.
Accompanying drawing explanation
accompanying drawing 1 is vertical view of the present invention (one);
accompanying drawing 2 is vertical view of the present invention (two);
accompanying drawing 3 is vertical view of the present invention (three);
accompanying drawing 4 is A-A sectional view of the present invention;
accompanying drawing 5 is B-B sectional view of the present invention;
accompanying drawing 6 is C-C sectional view of the present invention;
wherein: 1, V-type filter tank main body; 2, crown wall; 3, manhole; 4, cover plate; 5, Chi Ti; 6, V-type groove; 7, H-type groove; 8, the total canal of filter back washing; 9, sand filter blanket; 10, supporting layer; 11, filter plate; 12, controller; 13, filtrate to waste pipe; 14, gas-holder; 15, drying machine; 16, air compressor machine; 17, gas path pipe; 21, to intake total canal; 22, settling tank; 23, skip-cage combination shaft; 24, chemical feed pipe; 25, stirrer; 26, water inlet distributing canal; 27, influent weir; 28, water inlet pneumatic gate valve; 29, prosopyle; 30, inflow weir-adjustable plate; 31, overflow weir crest; 41, exit branch; 42, wet well; 43, outfall sewer; 44, Graceful water valve; 45, viewing window; 51, recoil inlet manifold; 52, recoil air valve; 53, gas distribution pipe; 54, recoil water inlet manifold; 55, recoil water valve; 56, water distributing pore; 57, recoil the total canal of draining; 58, draining pneumatic gate valve; 59, water shoot.
Embodiment
as shown in the drawings, a kind of V-type filter tank, comprise multiple V-type filter tank main body 1 for filtered water, for the water feed apparatus of intaking to each V-type filter tank main body 1, for the discharging device that the clear water after filtration is discharged, for the back-purge system cleaned each V-type filter tank main body 1, V-type filter tank also comprises the top being positioned at each V-type filter tank main body 1 and the crown wall 2 each V-type filter tank main body 1 closed, to be opened on crown wall 2 and can to enter for people multiple manholes 3 that V-type filter tank main body 1 carries out overhauling, for monitor V-type filter tank main body 1 filter effect and when the filter effect numerical value monitored is lower than the Controlling System that can control back-purge system during set(ting)value and to carry out V-type filter tank main body 1 back flushing.V-type filter tank also comprises being opened in and crown wall 2 can be used for multiple cover plates 4 of the situation of observing in V-type filter tank main body 1.Preferably, cover plate 4 is toughened glass.
multiple V-type filter tanks main body 1 is that the bearing of trend of symmetry axis is vertical with the bearing of trend of each V-type filter tank main body 1 along symmetry axis symmetrically arranged two groups of V-type filter tank main body groups.As shown in accompanying drawing 1 to accompanying drawing 3, often group V-type filter tank main body group has between three V-type filter tank main bodys, 1, two groups of V-type filter tank main body groups and has watch-keeping cubicle.As shown in Figure 4, each V-type filter tank main body 1 comprises the pond body 5 of opening upwards, the filtering layer be filled in pond body 5, is arranged on two V-type grooves 6 of relative both sides, pond body 5 top, is arranged on the H-type groove 7 of pond body 5 centre, the top of H-type groove 7 is the total canal 8 of filter back washing, bottom is clear water output, and filtering layer is followed successively by sand filter blanket 9, supporting layer 10 and filter plate 11 under upper.In addition, the concrete structure of each V-type filter tank main body 1 can with reference to the V-type filter tank of routine.
as accompanying drawing 1, 2, 4, shown in 6, water feed apparatus comprises the total canal 21 of water inlet for passing into water to be filtered, be connected for the settling tank 22 by water precipitation to be filtered with the total canal 21 of water inlet, the skip-cage combination shaft 23 be connected with settling tank 22, be connected with skip-cage combination shaft 23 for the chemical feed pipe 24 to dosing in skip-cage combination shaft 23, be arranged in skip-cage combination shaft 23 for the stirrer 25 by water to be filtered and medicine mixing, the water inlet distributing canal 26 be connected with skip-cage combination shaft 23, multiple influent weirs 27 between water inlet distributing canal 26 and multiple V-type filter tanks main body 1, for being communicated with multiple water inlet pneumatic gate valves 28 of water inlet distributing canal 26 and multiple influent weir 27, be opened on influent weir 27 for being communicated with the prosopyle 29 of the V-type groove 6 of influent weir 27 and V-type filter tank main body 1.
the front side often organizing V-type filter tank main body group is provided with a settling tank 22 and a skip-cage combination shaft 23, two settling tanks 22 are communicated with by total canal 21 of intaking intakes together, often organize V-type filter tank main body group and be provided with a water inlet distributing canal 26, water inlet distributing canal 26 is positioned at the outside often organizing V-type filter tank main body group.Influent weir 27 is provided with inflow weir-adjustable plate 30 and overflow weir crest 31.
as shown in accompanying drawing 2,4,5, discharging device comprises the many exit branch 41 be connected with the clear water output of each V-type filter tank main body 1, the multiple wet wells 42 be connected with every root exit branch 41, the outfall sewer 43 be connected with each wet well 42, the Graceful water valve 44 be arranged on every root exit branch 41.In wet well 42 and the watch-keeping cubicle of outfall sewer 43 between two groups of V-type filter tank main body groups, each wet well 42 is provided with the viewing window 45 for observing situation in wet well 42.
as accompanying drawing 2, 5, described in 6, back-purge system comprises recoil inlet manifold 51, the many recoil air intake branches be connected with recoil inlet manifold 51, be arranged on the recoil air valve 52 on every root recoil air intake branch, to recoil multiple gas distribution pipes 53 that air intake branch is connected with every root, recoil water inlet manifold 54, the many water inlet pipes that recoil be connected with recoil water inlet manifold 54, be arranged on the recoil water valve 55 on every root recoil water inlet pipe, to recoil multiple water distributing pores 56 that water inlet pipe is connected with every root, blow device for purging the top layer of V-type filter tank main body 1 on the sidewall being arranged on V-type filter tank main body 1, the total canal 57 of recoil draining be connected with the total canal of filter back washing 8 of each V-type filter tank main body 1, be arranged on the multiple draining pneumatic gate valves 58 between the total canal of filter back washing 8 of V-type filter tank main body 1 and the total canal of recoil draining 57, the water shoot 59 be connected with the total canal 57 of recoil draining, multiple gas distribution pipe 53 and multiple water distributing pore 56 are uniformly distributed along the bearing of trend of V-type filter tank main body 1, multiple gas distribution pipe 53 is arranged on the supporting layer 10 of V-type filter tank main body 1, and multiple water distributing pore 56 is arranged on the bottom of V-type filter tank main body 1.Recoil in inlet manifold 51 and the watch-keeping cubicle of recoil water inlet manifold 54 between two groups of V-type filter tank main body groups.
controlling System (without accompanying drawing) comprise the influent turbidity instrument be arranged on water feed apparatus, the delivery turbidity instrument be arranged on discharging device, be arranged in V-type filter tank main body 1 for the ultrasonic liquid leveller of sensed water level, be arranged on discharging device can reflect filtration situation aperture valve, for controlling the controller 12 of the operation in V-type filter tank.Controlling System also comprises the many stopple coupons be arranged on water feed apparatus, discharging device.Influent turbidity instrument and delivery turbidity instrument intuitively can reflect the running condition of whole group of V-type filter tank main body 1, by V-type filter tank main body 1 Inlet and outlet water turbidity being carried out contrast reaction filter tank to the rejection effect (also claiming filter effect) of impurity, thus by V-type filter tank main body 1 running condition Real-time Feedback to production run personnel, if rejection effect is lower than 80%, back flushing will be carried out to V-type filter tank main body 1.V-type filter tank main body 1 adopts permanent water lev el control, and water level conditions when ultrasonic liquid leveller monitoring V-type filter tank main body 1 is run, if when liquid level is constant, Graceful water valve 44 aperture becomes large gradually, then show that V-type filter tank main body 1 operation conditions declines, need back flushing.Aperture valve is contained on Graceful water valve 44, can show valve opening per-cent, reflection V-type filter tank directly perceived main body 1 running condition, and it is less that aperture larger explanation V-type filter tank main body 1 filters the water yield, reminds producers that this carries out back flushing to V-type filter tank main body 1.Controller 12 adopts PLC controlling board, in the watch-keeping cubicle of PLC controlling board between two groups of V-type filter tank main body groups.By PLC time variable control, according to Water And Drainage System Design code requirement, the flushing cycle of general sand filter is (45 ~ 48) hour, will enter auto-flushing after filter tank reaches this set(ting)value by time variable control, and flush time and intensity can manually adjust.
as described in accompanying drawing 2,5,6, V-type filter tank also comprises the filtrate to waste pipe 13 of discharging for water V-type filter tank main body 1 filtered for the first time that to be connected with each V-type filter tank main body 1, in the watch-keeping cubicle of filtrate to waste pipe 13 between two groups of V-type filter tank main bodys 1 group.Need first to clean filter tank and rinse filtrate after replacing filtrate after V-type filter tank is made, the water now after cleaning is discharged by filtrate to waste pipe 13.
as shown in Figure 3, V-type filter tank also comprises for the gas-holder 14 to water inlet pneumatic gate valve 28, Graceful water valve 44, recoil air valve 52, recoil water valve 55, draining pneumatic gate valve 58 air feed, drying machine 15 and air compressor machine 16.In gas-holder 14, drying machine 15 and air compressor machine 16 watch-keeping cubicle between two groups of V-type filter tank main body groups.The dry gas produced by gas-holder 14, drying machine 15 and air compressor machine 16 is delivered to into water pneumatic gate valve 28, Graceful water valve 44, recoil air valve 52, recoil water valve 55, draining pneumatic gate valve 58 air feed by gas path pipe 17.
as mentioned above, we are illustrated according to aim of the present invention completely, but the present invention is not limited to above-described embodiment and implementation method.Different changes and enforcement is carried out in the scope that the practitioner of correlative technology field can permit at technological thought of the present invention.

Claims (8)

1. a V-type filter tank, comprise multiple V-type filter tank main body (1) for filtered water, for the water feed apparatus of intaking to each described V-type filter tank main body (1), for the discharging device that the clear water after filtration is discharged, for the back-purge system cleaned each described V-type filter tank main body (1), it is characterized in that: described V-type filter tank also comprises the top being positioned at each described V-type filter tank main body (1) and the crown wall (2) closed in each described V-type filter tank main body (1), be opened on described crown wall (2) and can enter for people the multiple manholes (3) carrying out overhauling in described V-type filter tank main body (1), for monitor described V-type filter tank main body (1) filter effect and when the filter effect numerical value monitored is lower than the Controlling System that can control described back-purge system during set(ting)value and to carry out described V-type filter tank main body (1) back flushing,
Described back-purge system comprises recoil inlet manifold (51), the many recoil air intake branches be connected with described recoil inlet manifold (51), be arranged on the recoil air valve (52) on the recoil air intake branch described in every root, the multiple gas distribution pipes (53) be connected with the recoil air intake branch described in every root, recoil water inlet manifold (54), the many water inlet pipes that recoil be connected with described recoil water inlet manifold (54), be arranged on the recoil water valve (55) on the recoil water inlet pipe described in every root, the multiple water distributing pores (56) be connected with the recoil water inlet pipe described in every root, blow device for purging the top layer of described filtration body on the sidewall being arranged on described filtration body, the total canal of recoil draining (57) be connected with the total canal of filter back washing (8) in each described V-type filter tank main body (1), be arranged on the multiple draining pneumatic gate valves (58) between the total canal of filter back washing (8) in described V-type filter tank main body (1) and the described total canal of recoil draining (57), the water shoot (59) be connected with the described total canal of recoil draining (57), multiple described gas distribution pipe (53) and multiple described in water distributing pore (56) be uniformly distributed along the bearing of trend in described V-type filter tank main body (1), multiple described gas distribution pipe (53) is arranged on the supporting layer (10) in described V-type filter tank main body (1), multiple described water distributing pores (56) are arranged on the bottom in described V-type filter tank main body (1), described recoil inlet manifold (51) and described recoil water inlet manifold (54) are positioned between two groups of described V-type filter tank main body (1) groups,
Described Controlling System comprise the influent turbidity instrument be arranged on described water feed apparatus, the delivery turbidity instrument be arranged on described discharging device, be arranged in described V-type filter tank main body (1) for the ultrasonic liquid leveller of sensed water level, be arranged on described discharging device can reflect filtration situation aperture valve, for controlling the controller (12) of the operation in described V-type filter tank.
2. V-type filter tank according to claim 1, is characterized in that: described V-type filter tank also comprises multiple cover plates (4) of situation about being opened in V-type filter tank main body (1) described in described crown wall (2) can being used for observe.
3. V-type filter tank according to claim 1, it is characterized in that: multiple described V-type filter tank main body (1) is along the symmetrically arranged two groups of V-type filter tank main body groups of symmetry axis, the bearing of trend of described symmetry axis is vertical with the bearing of trend in each described V-type filter tank main body (1).
4. the V-type filter tank according to claim 1 or 3, it is characterized in that: described water feed apparatus comprises the total canal of water inlet (21) for passing into water to be filtered, be connected with the total canal of described water inlet (21) for the settling tank (22) by described water precipitation to be filtered, the skip-cage combination shaft (23) be connected with described settling tank (22), be connected with described skip-cage combination shaft (23) for the chemical feed pipe (24) to described skip-cage combination shaft (23) interior dosing, be arranged in described skip-cage combination shaft (23) for the stirrer (25) by water to be filtered and medicine mixing, the water inlet distributing canal (26) be connected with described skip-cage combination shaft (23), be positioned at the multiple influent weirs (27) between described water inlet distributing canal (26) and multiple described V-type filter tank main body (1), for being communicated with multiple water inlet pneumatic gate valves (28) of described water inlet distributing canal (26) and multiple described influent weir (27), be opened on described influent weir (27) for being communicated with the prosopyle (29) of the V-type groove (6) in described influent weir (27) and described V-type filter tank main body (1).
5. the V-type filter tank according to claim 1 or 3, is characterized in that: described discharging device comprise the many exit branch (41) be connected with the clear water output of each V-type filter tank main body (1), the multiple wet wells (42) be connected with the exit branch (41) described in every root, the outfall sewer (43) be connected with each described wet well (42), be arranged on described in every root exit branch (41) on Graceful water valve (44).
6. V-type filter tank according to claim 5, it is characterized in that: described multiple wet wells (42) and described outfall sewer (43), between described two groups of V-type filter tank main body groups, each described wet well (42) are provided with the viewing window (45) for observing described wet well (42) interior situation.
7. the V-type filter tank according to claim 1 or 3, is characterized in that: described V-type filter tank also comprises the filtrate to waste pipe (13) of discharging for the water filtered for the first time in described V-type filter tank main body (1) that to be connected with each described V-type filter tank main body (1).
8. the V-type filter tank according to claim 1 or 3, it is characterized in that: described water feed apparatus comprises into water pneumatic gate valve (28), described discharging device comprises Graceful water valve (44), described back-purge system comprises recoil air valve (52), recoil water valve (55), draining pneumatic gate valve (58), described V-type filter tank also comprises for described water inlet pneumatic gate valve (28), Graceful water valve (44), recoil air valve (52), recoil water valve (55), the gas-holder (14) of draining pneumatic gate valve (58) air feed, drying machine (15) and air compressor machine (16).
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