CN105314731A - Aeration device, water treatment apparatus, and operation method therefor - Google Patents

Abstract

The present invention provides an aeration device, a water treatment apparatus, and an operation method therefor, which are capable of preventing block of aeration holes, expanding the cleaning range of a membrane monomer through increasing air supply, and improving the cleaning effect. The aeration device (1) comprises a main tube (2) supplying gas from a gas supply device; and a branch tube (3) connected to the main tube (2). One end of the branch tube (3) is connected to the main tube (2), a plurality of first aeration holes (8) are formed on the upper side in the length direction of the branch tube (3), and the lower side is provided with tubular bodies (9) of second aeration holes (10).

Description

Loose device of air and water treatment device and method of operation thereof

Technical field

The present invention relates to loose device of air, there is water treatment device and the method for operation thereof of loose device of air.

Background technology

General in membrane separation activated sludge process (MBR), to there is the loose device of air of the diffuser being formed with air dispelling hole, be configured in the tank of the water treatment device (such as activated-sludge processing apparatus, Membrane cleaning device, membrane separation unit and drain treatment apparatus etc.) with membrane module unit, suppress the film blocking of membrane module unit.Namely, loose device of air is configured in the below of membrane module unit, the loose gas gases such as air are made to be ejected in tank from this loose device of air, aeration is carried out to processed water, and utilize the bubble of this loose gas gas rise and make to be attached to the strippings such as the mud on the film monomer of membrane module unit, carry out the physical cleaning of film thus and suppress film to block.

For the air dispelling hole of the diffuser making air spray from loose device of air, there will be a known the mode disclosed in patent documentation 1 ~ patent documentation 4.

Patent documentation 1: Japanese Unexamined Patent Publication 2010-119976 publication

Patent documentation 2: Japanese Unexamined Patent Publication 2001-170677 publication

Patent documentation 3: Japanese Unexamined Patent Publication 9-225272 publication

Patent documentation 4: Japanese Unexamined Patent Publication 2002-177745 publication

But, for the air dispelling hole of described diffuser, owing to easily blocking mud etc. herein, therefore, preferably aperture is done greatly to make it be difficult to produce blocking.In addition, the aperture of air dispelling hole is larger, more easily produces (ejection) large bubble, just high to the cleaning performance (cleaning force) of film monomer.In addition, when the gap-forming of air dispelling hole is obtained narrow, owing to cleaning film monomer entirety equably, therefore, it is desirable to the gap-forming of air dispelling hole to obtain narrow, eliminate the space not producing bubble flow between air dispelling hole and air dispelling hole.

But, when the aperture of air dispelling hole being done greatly and the interval of air dispelling hole being done narrow, poor owing to affecting crushing between air dispelling hole, therefore, if do not blown by many air, then evenly can not produce bubble from whole air dispelling holes.When whole air dispelling holes can not produce bubble equably, film monomer entirety is difficult to evenly be cleaned, and mud etc. are easily deposited on film monomer and produce film blocking.

Air dispelling hole will be done large and the interval of air dispelling hole is done narrow, evenly producing bubble, then must increase air output as described above, but because energy usage increases, therefore, the operating cost of MBR increases.Also can consider such technology, based on above-mentioned condition, carry out interval air-supply, reduce the energy usage of loose gas thus, but in this case, when loose gas stops, fully can not clean film.

In order to solve above-mentioned that problem, and consider such technology: usually carry out loose gas with less air output, and, blow than usually more where necessary or termly, capable of washing usually not by the part of cleaning thus.But, the loose device of air of patent documentation 1 ~ 4 designs by the imagination of carrying out a certain amount of air-supply, interval is blown, even if blow than usually more where necessary or termly, the expansion of clean range and the increase of its cleaning performance brought can not be expected.

Namely, the air dispelling hole of patent documentation 1 is only configured to upwards, the air dispelling hole of patent documentation 2 is configured to only downward, the air dispelling hole of patent documentation 3 is only configured to laterally, therefore, even if increase loose tolerance relative to time usually and where necessary or regularly, also just increase loose tolerance from identical air dispelling hole, the expansion of loose gas scope and the increase of its cleaning performance brought can not be expected.

In addition, because the aperture of air dispelling hole in patent documentation 2, patent documentation 3 is large, therefore, although produce large bubble, also need many air capacities with the gas that evenly falls apart all the time, energy usage becomes many.In addition, even if increase loose tolerance, new bubble flow can not be produced between air dispelling hole.

In addition, when diffuser entirety has the air dispelling hole of path as described in Patent Document 4, although loose gas scope is more favourable than patent documentation 1 ~ patent documentation 3, because the bubble of loose gas diminishes, therefore, cleaning performance is low, and air dispelling hole also easily blocks.

Summary of the invention

Invent problem to be solved

The present invention makes in view of the above problems, its object is to, and provides a kind of loose device of air and water treatment device and method of operation thereof, by preventing air dispelling hole from block, and increasing air output, can expand the clean range for film monomer, raising cleaning performance.

For solving the means of problem

The present invention has as under type.

[1] a kind of loose device of air, comprising: supervisor, and this supervisor is by from gas supply device supply gas; And arm, this arm is connected with described supervisor, one end of described arm is connected with described supervisor, and is formed with multiple 1st air dispelling hole in the upside of described arm along the length direction of this arm, has the tubular body arranged inside being formed with the 2nd air dispelling hole in the downside of described arm.

[2] the loose device of air as described in above-mentioned [1], wherein, described 1st air dispelling hole is formed as upwards, and described 2nd air dispelling hole is formed as downward.

[3] the loose device of air as described in above-mentioned [1], [2], wherein, the 2nd air dispelling hole of described tubular body arranged inside is configured between described 1st air dispelling hole of adjacent configuration.

[4] the loose device of air according to any one of above-mentioned [1] ~ [3], wherein, another side of described arm has opening port.

[5] the loose device of air as described in above-mentioned [4], wherein, described opening port is configured in the below of the lower openings of described 2nd air dispelling hole.

[6] the loose device of air as described in above-mentioned [4] or [5], wherein, the port area of described 2nd air dispelling hole is 1/6 ~ 1/2 relative to the port area of described opening port.

[7] the loose device of air according to any one of above-mentioned [1] ~ [6], wherein, the quantity of described tubular body arranged inside is more than 2, less than 10.

[8] water treatment device, has: tank; Be configured in the membrane module unit in described tank; Be configured in the loose device of air according to any one of described [1] ~ [7] of the below of described membrane module unit; And supply gas to the gas supply device of described loose device of air.

[9] water treatment device as described in above-mentioned [8], wherein, described water treatment device has gas supply control member, the feed rate of the gas being supplied to described loose device of air from described gas supply device is switched to the 1st specified amount or the 2nd specified amount by this gas supply control member, and described 1st specified amount produces bubble from described 1st air dispelling hole and can not produce the amount of bubble from described 2nd air dispelling hole; Described 2nd specified amount produces bubble from described 1st air dispelling hole and also makes described 2nd air dispelling hole produce the amount of bubble.

[10] a kind of method of operation of water treatment device, it is the method for operation of above-mentioned [8] or the water treatment device described in [9], the feed rate of the gas being supplied to described loose device of air from described gas supply device is switched to the 1st specified amount or the 2nd specified amount, and described 1st specified amount produces bubble from described 1st air dispelling hole and can not produce the amount of bubble from described 2nd air dispelling hole; Described 2nd specified amount produces bubble from described 1st air dispelling hole and also makes described 2nd air dispelling hole produce the amount of bubble.

The effect of invention

According to loose device of air of the present invention, because the length direction in the upside of arm along this arm forms multiple 1st air dispelling hole, and there is in downside the tubular body arranged inside being formed with the 2nd air dispelling hole, therefore, such as by doing greatly by the space of the 1st air dispelling hole and the 2nd air dispelling hole, can prevent these air dispelling holes from producing blocking.In addition, only bubble can be produced when being increased more than specified amount by air output from the 2nd air dispelling hole, therefore, where necessary or carry out when regular than usually many air-supplies, thus, also capable of washing usually not by the part of cleaning.In the clean range that it is possible to expand for film monomer by increasing air output, cleaning performance can be improved.In addition, operating with expanding clean range by only promoting air output where necessary or when regular, air output need not be promoted all the time, therefore usually can carry out energy-saving operation.

According to water treatment device of the present invention and method of operation thereof, prevent the blocking of air dispelling hole, the described loose device of air after utilizing cleaning performance to improve further carrys out rinsing membrane module unit well, thereby, it is possible to stablize and operate efficiently.

Accompanying drawing explanation

Fig. 1 is the vertical view of the 1st embodiment of loose device of air of the present invention.

Fig. 2 is the side-view of the loose device of air shown in Fig. 1.

Fig. 3 is the front view of the loose device of air shown in Fig. 1.

Fig. 4 is the stereographic map representing arm.

Fig. 5 is the side-view of membrane module unit.

Fig. 6 is the front view of membrane module unit.

Fig. 7 is the diagram of the schematic configuration of the embodiment schematically representing water treatment device of the present invention.

Fig. 8 is the front view of the schematic configuration of the 2nd embodiment representing loose device of air of the present invention.

Nomenclature

1 ... loose device of air, 2 ... supervisor, 3 ... arm, 8 ... 1st air dispelling hole, 9 ... tubular body arranged inside, 10 ... 2nd air dispelling hole, 20 ... membrane module unit, 21 ... membrane module, 30 ... water treatment device, 31 ... processed water, 32 ... tank, 40 ... air feeder (gas supply device), 43 ... gas supply control member, 50 ... loose device of air.

Embodiment

Below, the present invention is described in detail with reference to Figure of description.In addition, in accompanying drawing below, in order to each parts are formed as discernible size, therefore suitable change is carried out to the ratio of each parts.

Fig. 1 is the vertical view of the 1st embodiment representing loose device of air of the present invention, and Fig. 2 is the side-view of the loose device of air shown in Fig. 1, and Fig. 3 is the front view of the loose device of air shown in Fig. 1.

In the drawings, symbol 1 is loose device of air, and this loose device of air 1 comprises: cylindric supervisor 2, and the never illustrated air feeder of this supervisor 2 accepts the supply of gas; And multiple arm 3, the plurality of arm 3 is connected with this supervisor 2.

As shown in Figure 2, the end side of supervisor 2 is connected with flange pipe arrangement 5 via bend pipe 4, as described later, flange pipe arrangement 5 connects other flange pipe arrangement, thus just connects air feeder (gas supply device).

In addition, another side not opening of supervisor 2, is closed by resistance to air loss by covering 2a.This supervisor 2 is when axle configures in the horizontal direction wherein, under the state of i.e. horizontal arrangement, the side (side contrary with the side being connected to supervisor 2) of described bend pipe 4 is above vertical, and therefore, the flange pipe arrangement 5 connected therewith is also above vertical.

In addition, supervisor 2 is under the state of horizontal arrangement like this, and the vertical pipe portion 6 extended downwards from its underpart is arranged with supervisor 2 interior connection.In the present embodiment, be formed with threaded portion in the periphery (or inner circumferential) in vertical pipe portion 6, utilize this threaded portion, fixing part 7 and being connected with the lower end side in vertical pipe portion 6 dismantledly.As shown in Figure 3, fixing part 7 is the Y-tubes (T-shaped Y-tube) being formed as T-shaped, and the pipe portion 7a of central authorities utilizes tube stub connect or be screwed into the fixed mechanism of connection and be connected with vertical pipe portion 6.That is, in the threaded portion in vertical pipe portion 6, tube stub is connected with the threaded portion being formed at the pipe portion 7a of described central authorities of fixing part 7, or by being screwed into connection, fixing part 7 is connected with vertical pipe portion 6 dismantledly.

In addition, for the connection of fixing part 7, connect except tube stub and be screwed into except connection, also can adopt and such as be fitted and fixed with.But, in order to coming off of the arm 3 that reliably prevents from being connected with fixing part 7, preferably, connected by tube stub or be screwed into connection, fixing part 7 is connected with vertical pipe portion 6.

Under the state that fixing part 7 is connected with vertical pipe portion 6 at the pipe portion 7a of central authorities, the pipe portion 7b of its both sides is configured to level, and configuration is formed as the state along extending with the direction of the orthogonality of center shaft of supervisor 2.Here, in the present embodiment, as shown in Figure 2, the length direction along supervisor 2 is provided with multiple (such as about 5 ~ 10) vertical pipe portion 6 at equal intervals, therefore, fixing part 7 is also provided with the quantity identical with vertical pipe portion 6 in vertical pipe portion 6 multiple with these accordingly.That is, fixing part 7 is connected with each vertical pipe portion 6 respectively.

Further, on the pipe portion 7b of these fixing part 7 both sides, one end of arm 3 is connected to.As shown in Figure 3, arm 3 is parts of the cylindrical shape of the function playing diffuser, in the present embodiment, in its another side (with the opposite side of side being connected to pipe portion 7b), is formed with the flexing portion 3a extended below vertical.Opening port 3b is formed in the lower end (top) of flexing portion 3a.Thus, under the state that supervisor 2 is configured to level, opening port 3b is just below vertical.For flexing portion 3a, both made its flexing by carrying out bending machining to another side of arm 3, or also formed by parts such as assembling bend pipes.This flexing portion 3a, from bottom arm 3 to the length of opening port 3b, be preferably formed as more than 3mm, below 6mm.In addition, for the diameter of opening port 3b, be formed as such as identical with the diameter of arm 3.

In addition, on the upside of the side of arm 3, be formed with multiple circle and the 1st air dispelling hole 8 upwards.That is, the 1st air dispelling hole is formed as, as shown in Figure 1, Figure 3, under the state that supervisor 2 is configured to level, on the upside of the vertical of arm 3 and above vertical.For the quantity of the 1st air dispelling hole 8, the length etc. according to arm 3 suitably sets, but is preferably set to 4 ~ about 6.In the present embodiment, as Fig. 3 and represent arm stereographic map Fig. 4 shown in, be formed with 3 the 1st air dispelling holes 8 with the interval of about 80mm ~ 100mm (at equal intervals).The port area of the 1st air dispelling hole 8, the port area (port area of internal holes) being formed as the opening port 3b relative to arm 3 is about 1/6 ~ 1/2.

For the internal diameter of arm 3, although different according to the size (size) of loose device of air 1, be preferably formed as more than 10mm, below 20mm.In addition, for the port area of the internal holes of this arm 3, being preferably formed as relative to the port area of the internal holes of supervisor 2 is about 1/10 ~ 1/5.In addition, for the internal diameter of the 1st air dispelling hole 8, preferably more than 4.5mm, below 7.0mm is formed as.When the internal diameter of the 1st air dispelling hole 8 is less than 4.5mm, the 1st air dispelling hole 8 easily produces blocking because of mud etc., when more than 7.0mm, by the flow velocity of the air of the 1st air dispelling hole 8 with regard to step-down, likely can not obtain loose gas effect fully.

In addition, on the downside of the side of arm 3 (on the downside of vertical), be down formed with cylindric tubular body arranged inside 9, tubular body arranged inside 9 is formed the 2nd air dispelling hole 10 that vertical is downward.Tubular body arranged inside 9 is the parts of the function playing diffuser together with arm 3, is formed one or more relative to an arm 3.For the quantity of tubular body arranged inside 9, suitably set according to length of arm 3 etc., but be preferably set to more than 2, less than 10, be more preferably set to more than 2, less than 4.

In the present embodiment, as shown in Figure 3, Figure 4, tubular body arranged inside 9 is configured between adjacent the 1st air dispelling hole 8,8 being configured at arm 3, and therefore, when overlooking, the 2nd air dispelling hole 10 is also configured between the 1st air dispelling hole 8,8 of adjacent configuration.The port area (port area of internal holes) that the port area of the 2nd air dispelling hole 10 is formed as the opening port 3b relative to arm 3 is about 1/6 ~ 1/2.

For the length of tubular body arranged inside 9, namely from the coupling end of arm 3 to the length of the lower end of tubular body arranged inside 9, preferably short than the length of flexing portion 3a, become the position higher than the opening port 3b of the lower end (top) of described flexing portion 3a with the height of the vertical making the lower openings of the 2nd air dispelling hole 10 (opening of the side contrary with arm 3 side).Tubular body arranged inside 9 is longer than flexing portion 3a, therefore, when the aspect ratio opening port 3b of the lower openings of the 2nd air dispelling hole 10 is low, if desired described later or when regular promote aeration air quantity (air output) time, air does not spray from the 2nd air dispelling hole 10 from opening port 3b.

Here, supervisor 2 and arm 3, tubular body arranged inside 9, by the synthetic resins of polycarbonate, polysulfones, polyethylene, polypropylene, allyl resin, ABS resin, vinyl chloride resin etc., or the metal such as stainless steel is formed.In addition, in the present embodiment, owing to being connected with supervisor 2 by arm 3 via metal fixing part 7, therefore, for supervisor 2 and arm 3, preferably use such as SUS304's.

But, in the present invention, also can not connect supervisor 2 via fixing part 7, and arm 3 is directly connected (connection) with supervisor 2.Such as, when all forming supervisor 2 and arm 3 with synthetic resins, connect by bonding or welding process.In addition, when all forming supervisor 2 and arm 3 with metal, connect by welding process.In addition, for connecting of tubular body arranged inside 9 and arm 3, when arm 3 and tubular body arranged inside 9 are all synthetic resins, also being undertaken by bonding or welding process, when being all metal, being undertaken by welding process.

In addition, as shown in Figure 1, the configured in one piece of arm 3 becomes parallel with any other arm 3.In addition, arm 3, in the same area of the length direction of supervisor 2, connects towards the both sides of supervisor 2 via fixing part 7.Thus, arm 3 is configured to centered by being responsible for 2 symmetrical.The quantity of the arm 3 connected with supervisor 2 is arbitrary, suitably can determine according to length of supervisor 2 etc.

In addition, for the length of arm 3, length during overlooking namely from the cardinal extremity connected with fixing part 7 to top, is formed as below 500mm, is preferably formed as below 400mm.If the length of arm 3 is short, be then suitable for evenly faling apart gas, but preferably more than 50mm, more preferably more than 100mm, preferably, the size according to water treatment device is selected.

In addition, for the loose device of air 1 of this structure, such as, on flange pipe arrangement 5, also can be connected with described air feeder (gas supply device) pressure relief mechanism be made up of suction pump etc. dividually.Such 1, as described later, when stopping being turned by the air fed loose fate of air feeder, pressure relief mechanism can be utilized to reduce pressure in supervisor 2 and in arm 3.

By this Structure composing loose device of air 1 as shown in Figure 5, Figure 6, the below being configured in membrane module unit 20 uses.Membrane module unit 20 comprises multiple membrane module 21, and membrane module 21 comprises the film monomers (not shown) such as hollow-fibre membrane.

In addition, in the example shown in Fig. 5, Fig. 6, the loose device of air 1 shown in Fig. 1 ~ Fig. 3 is adjacent configuration 2 as illustrated in fig. 6, and is connected with air supply pipe 23 via a connection pipe arrangement (flange pipe arrangement) 22 on each flange pipe arrangement 5.Further, as described later, this air supply pipe 23 is connected with the air feeders such as gas blower (not shown).

This membrane module unit 20 and loose device of air 1 are configured at the water treatment device 30 shown in Fig. 7 and use.Water treatment device 30 is embodiments for water treatment device of the present invention, is the membrane separation unit of immersion type, has: drop into the tank (treatment trough) 32 having the processed waters such as active sludge 31; Be configured in the described membrane module unit 20 in tank 32; Be configured in the described loose device of air 1 below membrane module unit 20; And the gases such as air are supplied to the air feeder 40 of loose device of air 1.

In addition, in the water treatment device 30 of present embodiment, have 3 membrane module unit 20, therefore, loose device of air 1 is also configured in respective below accordingly with each membrane module unit 20.But, for the quantity of membrane module unit 20 and loose device of air 1, without particular limitation of, can set arbitrarily.

Tank 32 is rectangular-shaped, although size is not particularly limited, the degree of depth, preferably well beyond 1m, becomes more than 1m to make the depth of water of processed water 31.

Air feeder 40 comprises: gas blower 41; And connect the connecting pipings 42 of this gas blower 41 and described air supply pipe 23.

In addition, membrane module unit 20 (membrane module 21) is connected with suction pump (not shown) via attraction pipe arrangement 33, is configured to the attraction can carried out based on membrane module unit 20 and filters.

In addition, in the figure 7, for simplicity, eliminate the supervisor 2 and arm 3 etc. of loose device of air 1, but, in certain Fig. 7 with the loose device of air shown in symbol 1 be, there are 2 loose device of air 1 as shown in Figure 5, Figure 6, namely there is the loose device of air 1 shown in 2 Fig. 1 ~ Fig. 3.

Water treatment device 30 preferably, has gas supply control member 43, and the feed rate of this gas supply control member 43 to the gas (air) being supplied to loose device of air 1 from air feeder 40 switches.

The feed rate of air is switched to the 1st specified amount or the 2nd specified amount by gas supply control member 43, and is connected with gas blower 41.

1st specified amount is, does not spray air and produces bubble from the 2nd air dispelling hole 10 of tubular body arranged inside 9, and can only spray air from the 1st air dispelling hole 8 of arm 3 and produce the air output of bubble.

2nd specified amount is, sprays air and produce bubble from the 1st air dispelling hole 8 of arm 3, also can spray air from the 2nd air dispelling hole 10 of tubular body arranged inside 9 and produce the air output of bubble simultaneously.

Below, the method for operation of this water treatment device 30 is described.

First, as shown in Figure 7, in tank 32, configuration membrane module unit 20 and loose device of air 1 etc., and the water level (depth of water) processed water 31 savings being become regulation.Further, in this condition, by making the suction pump action of membrane module unit 20 side, the attraction undertaken based on membrane module unit 20 is filtered.

In addition, filter concurrently with this attraction, as usually operating from air feeder 40 (gas blower 41) to loose device of air 1 air supply continuously.As the feed rate of air, be set to the 1st specified amount suitably determined according to the size of loose device of air 1 etc.1st specified amount is, obtains, and be stored in gas supply control member 43 according to experiment in advance or simulated experiment.Now, preferably evenly bubble is produced from each 1st air dispelling hole 8.In addition, do not spray air in this wise from the 2nd air dispelling hole 10, thus, air also surely not sprays from the opening port 3b of arm 3.

Sprayed from the 1st air dispelling hole 8 of arm 3 by supervisor 2 as previously mentioned by the air being supplied to loose device of air 1 with the 1st specified amount air supply via air supply pipe 23 in this wise.That is, in the 1st air dispelling hole 8, hydraulic pressure is lower than the 2nd air dispelling hole 10 of tubular body arranged inside 9, lower than the opening port 3b of arm 3, and therefore, if special in high air quantity air supply, then the air being supplied to loose device of air 1 all sprays from the 1st air dispelling hole 8.

So, when spraying air from the 1st air dispelling hole 8, the air sprayed becomes bubble, and in tank 32, namely rises in processed water 31.Bubble after rising forms gas-liquid mixed stream with processed water 31.This gas-liquid mixed stream touches membrane module unit 20 (membrane module 21) and cleans each film monomer (not shown).That is, the mud etc. being attached to film monomer (membrane module unit 20) surface is suspended thing stripping by gas-liquid mixed stream, removes from membrane module unit 20.

But, in this usual running, the air output to loose device of air 1 undertaken by air feeder 40 (air feed rate) is set as less, therefore the 1st specified amount that energy usage is reduced is set as, therefore bubble can not be produced between the 1st especially adjacent air dispelling hole 8,8, thus, sometimes sufficient cleaning performance can not be obtained.Therefore, mud etc. to the attachment of membrane module unit 20 (membrane module 21) become many if desired, and during regular after the time preset, switch to special running from running usually.

In this especially running, be only switched to 2nd specified amount larger than described 1st specified amount carry out by air is supplied to the feed rate of loose device of air 1 and air output from air feeder 40 (gas blower 41).2nd specified amount is also obtained according to experiment or simulated experiment in advance, and is pre-stored within gas supply control member 43.Now, preferably, evenly produce bubble from each 1st air dispelling hole 8, also evenly produce bubble from each 2nd air dispelling hole 10 in addition.

In addition, spraying the special running of air from the 2nd air dispelling hole 10 in this wise, preferably also setting the 2nd specified amount, do not spray from the opening port 3b of arm 3 to make air.That is, be preferably configured to, surprisingly rise and to substantially exceed the situation of the 2nd specified amount inferior from the opening port 3b of arm 3 at the air output especially from air feeder 40, utilize sharply to press and rise exhausted air and produce breakage to avoid loose device of air 1.

In addition, when turning (running usually, especially running) to this loose fate and carrying out the specified time (such as a few hours), the mud in processed water 31 etc. flow in arm 3 and in supervisor 2 a little, and residual buildup.The impurity such as the mud of accumulation like this, by blowing attached air and dry gradually in turning in loose fate.Therefore, if this drying constantly, mud is solidification just, makes in supervisor 2 and arm 3 inner sealing, or makes the 1st air dispelling hole 8, the 2nd air dispelling hole 10 generation blocking.

Therefore, after loose fate is turned carrying out the specified time, gas blower 41 is stopped certain hour (such as tens of second ~ several minutes), stop to loose device of air 1 air supply.Like this, the air residued in supervisor 2 and arm 3 is just released from the 1st air dispelling hole 8 and is discharged to processed water 31, cleans membrane module unit 20.In addition, carry out replacing with this air and flow into processed water 31 from opening port 3b and the 2nd air dispelling hole 10.

The processed water 31 of inflow like this, such as, foreign matter (mud) after the drying accumulation making the 1st air dispelling hole 8 block and the mud humidification be deposited in arm 3.Therefore, after some period of time, when making gas blower 41 action and again starting loose gas, these foreign matters and mud easily can be discharged from the 1st air dispelling hole 8.That is, can in supervisor 2 and in arm 3 and the 1st air dispelling hole 8 and the 2nd air dispelling hole 10 clean.

For the loose device of air 1 of present embodiment, because the length direction in the upside of arm 3 along this arm 3 forms multiple 1st air dispelling hole 8, and there is in downside the tubular body arranged inside 9 being formed with the 2nd air dispelling hole 10, therefore, by doing greatly by the aperture of such as the 1st air dispelling hole 8 and the 2nd air dispelling hole 10, can prevent these air dispelling holes 8,10 from producing blocking.In addition, only when air output being set as more than the 1st specified amount, namely only when being set as the 2nd specified amount, bubble can be produced from the 2nd air dispelling hole 10, therefore, where necessary with time regular by carrying out than usually many air-supplies, thus also capable of washing usually not by the part of cleaning.So the clean range expanded for film monomer by increasing air output, can improve cleaning performance.In addition, operate with expanding clean range by only promoting air output where necessary or when regular, thus air output need not be promoted all the time, therefore usually can carry out energy-saving operation.

In addition, owing to up forming the 1st air dispelling hole 8, down form the 2nd air dispelling hole 10, therefore, the differential water pressures between these the 1st air dispelling holes 8, the 2nd air dispelling hole 10 can be strengthened, do not spray air from the 2nd air dispelling hole 10 therefore, it is possible to expand and only spray the scope of the air output of air from the 1st air dispelling hole 8.Therefore, it is possible to easily carry out the control that loose fate turns.

In addition, during owing to overlooking, the 2nd air dispelling hole 10 is configured between adjacent the 1st air dispelling hole 8,8 being configured at arm 3, therefore, when where necessary with when increasing than usually many air outputs time regular, just producing and rising between the bubble risen from the bubble of the 2nd air dispelling hole 10 generation from the 1st air dispelling hole 8,8.Therefore, effectively can expand the clean range for film monomer, film monomer can be cleaned equably.

In addition, because another side of arm 3 has opening port 3b, therefore, when loose device of air 1 quits work, in loose device of air 1, earlier processed water 31 can be become from air displacement by flowing into processed water 31 from opening port 3b.In addition, when the air output from air feeder 40 surprisingly rises, can prevent loose device of air 1 to rise and damaged because pressing in sharply.

In addition, owing to opening port 3b to be configured in the below of the lower openings of the 2nd air dispelling hole 10, therefore, when where necessary with when air output being set as time regular than the 2nd usually many specified amounts, opening port 3b can not be made to spray air, can only spray air from the 1st air dispelling hole 8 and the 2nd air dispelling hole 10 and evenly produce bubble.

In addition, due to when the amount of the air supplied from air feeder 40 is the 1st specified amount, 2nd air dispelling hole 10 does not produce bubble and produces bubble from the 1st air dispelling hole 8, when the amount of the gas supplied from gas supply device is for being greater than the 2nd specified amount of the 1st specified amount, produce bubble from the 1st air dispelling hole 8 and also produce bubble from the 2nd air dispelling hole 10, therefore, air output is set as the 1st specified amount to operate, only promote air output be set as the 2nd specified amount where necessary with time regular, thus, usually energy-saving operation can be carried out, where necessary with can expand clean range time regular and improve cleaning performance.

According to water treatment device 30 of the present invention, the blocking of the 1st air dispelling hole 8 and the 2nd air dispelling hole 10 can be prevented, in addition, the loose device of air after utilizing cleaning performance to improve and rinsing membrane module unit 20 well, thus Absorbable organic halogens and operating efficiently.

Fig. 8 is the diagram of the 2nd embodiment for illustration of loose device of air of the present invention, is the front view of the schematic configuration representing loose device of air.Loose device of air 50 shown in Fig. 8 is from the different of loose device of air 1 shown in Fig. 1 ~ Fig. 3: do not form opening port 3b in another side of arm 3, and is such as hermetic closed by this other end side seal with lid (not shown).

When being closed by the other end side seal in this wise, the length of tubular body arranged inside 9 is preferably set as more than 1mm, below 3mm left and right.The length of tubular body arranged inside 9 is less than 1mm, is because such reason: when the air output of usual (usually) is relatively low amount (below the 1st specified amount), also likely spray air from the 2nd air dispelling hole 10 of tubular body arranged inside 9.Namely be such cause: when this low air quantity, if spray air from the 2nd air dispelling hole 10, then likely can not evenly fall apart gas.In addition, be such cause: if the length of tubular body arranged inside 9 is more than 3mm, then, when will spray air from the 2nd air dispelling hole 10, need very many air outputs, energy usage becomes many.If in contrast, the length of tubular body arranged inside 9 is set as more than 1mm, below 3mm, then only sprays air from the 1st air dispelling hole 8 with usual low air quantity, and such as promote air output at double, also can spray air from the 2nd air dispelling hole 10 thus.

For the loose device of air 50 of present embodiment, multiple 1st air dispelling hole 8 is formed with in the upside of arm 3 owing to also having, the tubular body arranged inside 9 of the 2nd air dispelling hole 10 is formed in downside, therefore, by doing greatly by the aperture of such as the 1st air dispelling hole 8 and the 2nd air dispelling hole 10, can prevent these air dispelling holes 8,10 from producing blocking.In addition, by where necessary with carry out than usually many air-supplies time regular, also capable of washing usually not by the part of cleaning, therefore, the clean range that can expand for film monomer by increasing air output, can improve cleaning performance.In addition, operate with expanding clean range by only promoting air output where necessary or when regular, thus usually can carry out energy-saving operation.

Above, with reference to the accompanying drawings of the preferred embodiment of the present invention, but the present invention is not limited to above-mentioned embodiment.All shapes of each structure unit in the above-described embodiment and combination etc. are examples, without departing from the scope of the subject in the invention, can carry out various change based on design requirements etc.

Such as, in the above-described embodiment, although in the end side of supervisor 2 via bend pipe 4, flange pipe arrangement 5 and connect air feeder, another side is closed by covering 2a, but, also can according to the size (size) of loose device of air 1, namely inferior in the situation capacious of loose device of air 1, and make the both ends open of supervisor 2 and connect air feeder respectively, from the both sides air supply of supervisor 2.

In addition, in the above-described embodiment, although supply air to loose device of air from air feeder and spray air from air dispelling hole, also as required the gas beyond the air such as such as nitrogen can be supplied to loose device of air from gas supply device.

[embodiment]

Below, utilize embodiment and illustrate the present invention further.

[embodiment]

Use the loose device of air shown in Fig. 8, make it be impregnated in clear water.Further, utilize air feeder from the base end side (side of connecting elbow 4) of supervisor 2 and distinguish air supply with each air output of 25L/min, 50L/min, 75L/min, 100L/min, 125L/min, 150L/min, 175L/min.

So, by visual confirmation there to be the 1st air dispelling hole 8 of arm 3 of having no way of during each air output air supply, the 2nd air dispelling hole 10 of tubular body arranged inside 9 sprays air.

The result of visual confirmation is, confirm following situation: when each air output with 50L/min, 75L/min, 100L/min, 125L/min during air supply, air is not sprayed from the 2nd air dispelling hole 10, only spray air from the 1st whole air dispelling holes 8, and evenly produce bubble from these the 1st air dispelling holes 8.

In addition, following situation is confirmed: when each air output with 150L/min, 175L/min during air supply, spray air from the 1st whole air dispelling holes 8 and the 2nd whole air dispelling holes 10, between the 1st air dispelling hole 8 and between the 2nd air dispelling hole 10, evenly produce bubble.

In addition, confirm following situation: when the air output with 25L/min during air supply, although only spray air from the 1st air dispelling hole 8 and produce bubble, between the 1st air dispelling hole 8, do not produce uniform bubble, but produce uneven bubble.

Therefore, known: by air feed rate is set as more than 50L/min, air can be sprayed equably from the 1st whole air dispelling holes 8, be less than below 50L/min, such as 25L/min, then can not spray air equably.

In addition, known: by air feed rate being increased to 3 times of the air feed rate (50L/min) of the gas that can evenly fall apart, also evenly can spraying air from the 2nd air dispelling hole 10, loose gas scope can be expanded thus.Therefore, confirm following situation: expand clean range by increasing air output, and cleaning performance can be improved.

[comparative example]

In addition, in order to compare, except there is no tubular body arranged inside 9 (comprising the 2nd air dispelling hole 10), use the loose device of air with the loose device of air same structure shown in Fig. 8, with each air output air supply same as the previously described embodiments.

So, confirm during each air output air supply, have the 1st air dispelling hole 8 of arm 3 of having no way of to spray air by visual.

Visual confirmation as a result, known: when the air output of more than 50L/min, spray air from the 1st whole air dispelling holes 8, and produce bubble.But, even if increase air output, owing to there is no tubular body arranged inside 9, therefore there is no the 2nd air dispelling hole 10, so the expansion of loose gas scope can not be realized yet.Therefore, known: even if increase air output, can not to expect to utilize the expansion of clean range to improve cleaning performance.

Can confirm according to above result: as mentioned above, embodiments of the invention can obtain the not getable excellent effect of comparative example, namely embodiments of the invention can expand clean range by increasing air output, and can improve cleaning performance.

Claims (10)

1. a loose device of air, comprising: supervisor, and this supervisor is by from gas supply device supply gas; And arm, this arm is connected with described supervisor, and the feature of described loose device of air is,

One end of described arm is connected with described supervisor, and is formed with multiple 1st air dispelling hole in the upside of described arm along the length direction of this arm, has the tubular body arranged inside being formed with the 2nd air dispelling hole in the downside of described arm.

2. loose device of air as claimed in claim 1, is characterized in that,

Described 1st air dispelling hole is formed as upwards, and described 2nd air dispelling hole is formed as downward.

3. loose device of air as claimed in claim 1 or 2, is characterized in that,

2nd air dispelling hole of described tubular body arranged inside is configured between described 1st air dispelling hole of adjacent configuration.

4. the loose device of air according to any one of claims 1 to 3, is characterized in that,

Another side of described arm has opening port.

5. loose device of air as claimed in claim 4, is characterized in that,

Described opening port is configured in the below of the lower openings of described 2nd air dispelling hole.

6. the loose device of air as described in claim 4 or 5, is characterized in that,

The port area of described 2nd air dispelling hole is 1/6 ~ 1/2 relative to the port area of described opening port.

7. the loose device of air according to any one of claim 1 ~ 6, is characterized in that,

The quantity of described tubular body arranged inside is more than 2, less than 10.

8. a water treatment device, is characterized in that, has:

Tank;

Be configured in the membrane module unit in described tank;

Be configured in the loose device of air according to any one of the claim 1 ~ 7 below described membrane module unit; And

Supply gas to the gas supply device of described loose device of air.

9. water treatment device as claimed in claim 8, is characterized in that,

Described water treatment device has gas supply control member, the feed rate of the gas being supplied to described loose device of air from described gas supply device is switched to the 1st specified amount or the 2nd specified amount by this gas supply control member, and described 1st specified amount produces bubble from described 1st air dispelling hole and can not produce the amount of bubble from described 2nd air dispelling hole; Described 2nd specified amount produces bubble from described 1st air dispelling hole and also produces the amount of bubble from described 2nd air dispelling hole.

10. a method of operation for water treatment device, is the method for operation of the water treatment device described in claim 8 or 9, it is characterized in that,

The feed rate of the gas being supplied to described loose device of air from described gas supply device is switched to the 1st specified amount or the 2nd specified amount, and described 1st specified amount produces bubble from described 1st air dispelling hole and can not produce the amount of bubble from described 2nd air dispelling hole; Described 2nd specified amount produces bubble from described 1st air dispelling hole and also produces the amount of bubble from described 2nd air dispelling hole.