CN2464723Y

CN2464723Y - Diaphragm type arch-shaped porous aerator

Info

Publication number: CN2464723Y
Application number: CN01210051U
Authority: CN
Inventors: 张华�; 于龙庆; 李罗中
Original assignee: JINTAN CITY PLASTIC PLANT
Current assignee: JINTAN CITY PLASTIC PLANT
Priority date: 2001-01-04
Filing date: 2001-01-04
Publication date: 2001-12-12
Anticipated expiration: 2011-01-04

Abstract

The utility model discloses a diaphragm type arched micropore aerator which is characterized in that a diaphragm packed on an upper supporting seat, the peripheries of the top and the bottom of the diaphragm are fixed, the top center is provided with an arched curved face diaphragm, and an air supply channel is annular. The utility model not only satisfies the requirement that air is supplied from the center of the diaphragm and then diffuses to the periphery, but also ensures that the center of the diaphragm and the periphery of the lower part of the diaphragm are stressed uniformly. The aeration efficiency and the uniformity of the air distribution on the surface of the diaphragm are raised, the tear resistance performance of the diaphragm is improved, and the service life is extended.

Description

Diaphragm type arch micro-hole aerator

The utility model relates to waste water biological treatment apparatus, specifically a kind of diaphragm type arch micro-hole aerator.

Aerator is the key equipment in the biological process of wastewater treatment, and it plays the vital role of oxygen supply, mass transfer, stirring and mixed flow in water treatment process, and its efficient just is directly connected to the treatment effect and the working cost of whole water treatment system.Therefore, the technological development and the innovation of this kind equipment all are devoted in countries in the world always in decades; Domestic research and the application that also begins to carry out this respect from the seventies.Originally be the boring aeration device, the aperture of this class aerator reaches about 3.0mm, and pitch of holes reaches 100mm, and gas distribution is very inhomogeneous, easily stops up, and coefficient of oxygen utilization is lower than 15%, and dynamic efficiency is lower than 2.5kgO ₂/ kw.h; The perforated pipe aerating regulation device, owing to be to belong to macropore aeration scope, the aeration inefficiency is used in the big area pond, is prone to serious latch up phenomenon, causes local aeration dead band, this class aerating apparatus can not be mentioned in the same breath with the micro-pore aeration technology at present; Develop disc type sintered ceramic micro-hole aerator to early eighties, about micropore size 200 μ m, the aeration effect is significantly better than the former, but because ceramic air distribution plate is thicker, the outer imperial palace of micropore air flue is little, also easily stops up, and the back water electrode of stopping the supple of gas or steam easily pours in down a chimney into steam line; The ceramic capillary aerator is because the gas distribution material adopts pottery, its structural strength and corrosion resistance are better than the former, long service life, but owing to adopt the sintered ceramic technology to offer micropore, belong to the rigidity opening, lamina membranacea thickness is big, micropore air flue on the lamina membranacea is long and to be the young air outlet of air inlet big, source of the gas is required process dust removal process earlier, and easily by sludge blockage, sludge removal is difficult in the hole during operation; Water body easily takes place when stopping the supple of gas or steam pour in down a chimney, and from operating performance, the efficient of this class aerator also can not show a candle to elastica chip aerator, also less at home at present application into steam line; To the early 1990s introduction american rubber diaphragm disc type micro-hole aerator, the diaphragm micropore size is contracted to about 120 μ m, and diaphragm thickness has only 2.0mm, high resilience is heaved during aeration slightly, shrinks when stopping the supple of gas or steam, the aeration effect is again significantly better than the above two, and coefficient of oxygen utilization reaches 20%.Dynamic efficiency reaches 4.5kgO ₂/ kw.h, but, in the pond, after for some time operation, easily pile up mud on the diaphragm owing to be flat diaphragm structure, blocking microporous, reduce aeration efficient, and because the local obstruction of diaphragm, can cause during aeration that membrane surface tension force increases, shorten work-ing life, also local explosion can occur sometimes; For anti-sealing pours in down a chimney into steam line, the spy sets up reverse checkvalve on its structure, has also increased invalid aeration resistance, has reduced dynamic efficiency in addition; Plate shaped microporous diaphragm aerator, it is one type of maximum aerator of domestic present application, since external introduction, had nearly ten years history from 91 years, its place more excellent than preceding several aerators just is to have adopted flexible sheet micropore technology, this diaphragm is very thin, have only 2 mm thick, micropore has only about 100 microns, can offer several thousand micropores on the aerator, the bubble diameter that produces in the pond is less than 3 millimeters, and the aeration effect is improved largely than preceding several types, and because of adopting flexible sheet, the micropore stopping property is better, is difficult for by extraneous sludge blockage, and it is easy to clean more preceding several prods; But the shortcoming of this product just is that it adopts two dimensional structure and diaphragm directly to the punching technology, can not be adjacent to supporting base after the long-time running diaphragm is loose, mud is easily piled up on diaphragm, local blocking aeration micropore, cause the aeration decrease in efficiency, and, membrane surface causes discontinuity because of stopping up because of the part, some local supertension, cause the diaphragm premature aging impaired, reduce work-ing life, in addition, because of diaphragm adopts directly to the punching technology, close very not tightly when micropore is stopped the supple of gas or steam, if the punching technology is relatively poor, the possibility that water body pours in down a chimney aerator into is just very big, for preventing that water body from entering steam line, this class aerator is generally set up reverse checkvalve at inlet mouth, has increased invalid resistance, greatly reduces aeration efficient; Spherical microporous diaphragm aerator, this aerator also adopts the arc diaphragm, the top intake method, but diaphragm arc bow height is shorter, compare with plate shaped diaphragm type aerator and to improve, but its diaphragm adopts single-ended fixed form, top membrane is high during aeration heaves, and the lower periphery diaphragm is stretched and is adjacent to supporting base, because of lower periphery diaphragm-operated perforate density much larger than diaphragm top center district, cause membrane surface cloth air exhaustion inhomogeneous, membrane surface is stressed also inhomogeneous, in long-time running, and the top membrane supertension, fatiguability is impaired, reduction of service life; This aerator still adopts directly to diaphragm punching technology, and its micropore stopping property is not very tight, thereby the anti-water body of the whole aerator ability of pouring in down a chimney is not very reliable.

The purpose of this utility model is to provide a kind of improved diaphragm type arch micro-hole aerator, and it can overcome some shortcomings of the prior art.

The technical solution of the utility model is achieved in that a kind of diaphragm type arch micro-hole aerator, it mainly comprises the supporting base of being made up of upper and lower supporting base, on supporting base, be provided with the elastic caoutchouc diaphragm of micropore, in supporting base, be provided with air supply duct to the diaphragm air feed, it is characterized in that: diaphragm Bao Meng is on upper branching holder, diaphragm-operated top and lower periphery are fixed, and top center is the arched surface diaphragm that has standing bolt, and air supply duct is an annular.

The utility model has following constructional feature and function compared with prior art:

1, adopt domes, the diaphragm of the utility model product and diaphragm support structure all adopt domes, have excellent slip and anti-deposition effect on operation is used, and have improved aeration efficient greatly, have prolonged diaphragm work-ing life; Under the condition of equivalent diameter, the surface-area of dome-shaped diaphragm is bigger 1.3～1.4 times than plate shaped diaphragm, that is to say under the condition of equal aeration rate specification, pore density reduces on the diaphragm, pitch of holes increases, and has improved the diaphragm-operated tear resistance greatly, has prolonged work-ing life;

2, adopt annular air channel and two ends formula diaphragm fixed sturcture, can prevent that water body from pouring in down a chimney, because aerator is to spread to periphery from the diaphragm central gas-supply again, when air feed, diaphragm is upwards heaved, between diaphragm and upper branching holder, form an air chamber (air cushion layer), again by the outside diffusion gas of diaphragm micropore, if adopt single-ended fixed form, i.e. fixing diaphragm lower periphery only, flexible sheet height of center height is heaved in the time of certainly will causing air feed, lower periphery tension and be adjacent to supporting base, and a large amount of gases are walked toward the diaphragm center, but because of diaphragm bottom pore density will be much larger than the center, will influence the homogeneity of diaphragm gas distribution so greatly, and because of the membrane surface discontinuity, the center diaphragm is overdrawn can significantly reduce work-ing life in long-time running; The design's bearing top employing annular air channel and the two ends fixed form that the diaphragm center compresses with bolt and lower periphery compresses with clamping ring, both satisfied the requirement of spreading to periphery again from the diaphragm central gas-supply, make diaphragm center and lower periphery stressed evenly again, the homogeneity and the aeration efficient of membrane surface gas distribution have been improved greatly, the border operation is measured factually, the two ends fixed form improves 60～80% than single-ended fixed form gas distribution homogeneity, and aeration efficient is greatly improved;

3, adopt diaphragm central thickened and side direction punching technology and set up water blocking ring, because the air feed direction is therefrom mind-set lower periphery diffusion, the diaphragm center is stressed bigger than periphery when operation starts, fatiguability is loose, therefore suitably thicken the diaphragm central core and help improving operational efficiency and increase the service life, the design adopts special mould and rubber compounding to increase the thickness and the intensity at the inboard diaphragm of water blocking ring center; General diaphragm is offered micropore and is adopted directly to the punching technology, be that the perforate direction is vertical with diaphragm, sometimes the stressed diaphragm penetrance that excessively can make is excessive, water body is poured in down a chimney in the aerator, the design adopts unique side direction punching technology and equipment, can make the perforate direction become a directed angle with membrane surface, in this product design, offer rectangular micropore, progressively increase hole count in the concentric(al) circles mode by mind-set periphery in the diaphragm, levels is staggered, the micropore minor face tilts along the diaphragm radian to become 50 ° of angles with membrane surface, and diaphragm micropore import and export forms a staggered overlap joint, diaphragm micropore lateral overlap mouth deflection dome-shaped diaphragm bottom, just in time form a check valve under the effect at hydraulic pressure when the operation of diaphragm gas distribution opens and closes, can stop water body to flow backwards effectively; For further improving the anti-water body tank switching of aerator ability, at the ad hoc again sealing-ring that blocks water in imperforate section place, dome-shaped diaphragm internal surface center, when stopping aeration, diaphragm withdrawal supporting base, water blocking ring is embedded in the corresponding grooves of supporting base top, can stop water body to pour in down a chimney into supporting base annular air channel effectively; Because of having adopted above two kinds of effective measure, thoroughly stopped the possibility that water body pours in down a chimney, so can eradicate the reverse checkvalve that generally is provided with in the flat diaphragm aerator, improved aeration efficient greatly from the aerator structure, reduced running cost;

4, adopted perfect seal approach on the structure, the design adopts each web member joint and flexibly connects, from the aerator inlet mouth, up and down between the supporting base air flue, between diaphragm top bolt hole and upper branching holder bolt sleeve nozzle and diaphragm bottom all adopts the resilient material sealing to reach with the junction of last undersetting mosaic site and guaranteed the fixing seal reliability of material in structure design, improved the operational efficiency and the safe reliability of the airtight effect and the aerator of these junctions greatly;

5, the utility model can be divided into two types according to the different characteristics of biochemical treatment process for wastewater and micro-polluted source water biochemical processing process, the former is JT-2 type, the latter is JT-1 type, both supporting base structures are identical, the diaphragm-operated shape is also roughly the same, but both perforate modes, perforate density are different with arrangement mode, can satisfy the aeration requirement of two kinds of different water technologies to greatest extent, improve production run efficient, reduce running cost.Survey according to operation: the technical indicator of the utility model product is as follows: coefficient of oxygen utilization＞25%, oxygenation capacity＞0.23kg/h, theoretical dynamic efficiency＞5.5kg/kw.h, service area 0.5～0.6m ²/, drag losses＜3500Pa;

6, the utility model adopts dome-shaped diaphragm, the diaphragm specific surface area is big, tear resistance is good, slip and anti-deposition performance are excellent, the diaphragm air feed port is located at the aerator top, the air feed direction is spread to lower periphery by the top, the diaphragm top also is provided with the sealing-ring that blocks water, diaphragm adopts advanced side direction punching technology again, micropore tilts along diaphragm radian direction, and the oblique cut grafting of micropore membrana oralis is in when operation opens and closes and has the check valve effect, can stop the possibility that water body pours in down a chimney and need not set up check valve more in addition after adopting these several modern techniquies, improve the aerator operational efficiency greatly, prolonged work-ing life;

7, the two ends fixed sturcture of the dome-shaped diaphragm of the utility model product, the center annular air flue, The Application of Technology such as diaphragm central thickened and side direction punching have improved a step undoubtedly again greatly, and the production run efficient of product and work-ing life and security have new raising again;

8, the great innovation of another of the utility model product is a difference of having distinguished biochemical treatment process for wastewater and micro-polluted source water biochemical processing process, characteristics separately according to these two kinds of technologies, corresponding with it diaphragm structure and micropore decoration form have been designed respectively, improved the operational efficiency of back a kind of technology greatly, this still initiates at home.

Fig. 1 is an integral installation figure of the present utility model

Fig. 2 is the utility model section of structure

Fig. 3 is aerator top air flue and the diaphragm perforation structural representation in the utility model

The utility model will be further described below in conjunction with drawings and Examples.

See also legend, the utility model mainly comprises by upper branching holder 4, the supporting base that lower support seat 7 is formed, on supporting base, be provided with the elastic caoutchouc diaphragm 2 of micropore, in supporting base, be provided with air supply duct 12 to diaphragm 2 air feed, it is different from prior art and is: diaphragm 2 bags cover on upper branching holder 4, and the top and the lower periphery of diaphragm 2 fixed, the diaphragm top center is the arched surface diaphragm that has standing bolt, air supply duct 12 is an annular, the diaphragm top is provided with standing bolt 1 in an embodiment, be provided with bolt collar 22 at upper branching holder 4, the bolted of this nut sleeve 22 and lower support seat, diaphragm 2 lower periphery adopt clamping ring 6 fixing, be provided with sealing-ring between diaphragm top bolt hole and the upper branching holder bolt collar hole, on, be provided with grommet type seals 8 between lower support seat ring shape air flue, 9, be provided with the seal strip of inwardly turning up 20 in the diaphragm lower periphery, the center is the dome-shaped diaphragm supporting base that has annular air channel; This aerator is fixed on the steam line by using upper and lower annular plugboard 13,14 and following movable plugboard 15, there is a circular air inlet short tube 11 in bowl-type lower support seat bottom centre, this short tube is connected with air feed port on the steam line, seals with sealing-ring 10 between two interfaces; The upper and lower supporting base of diaphragm centre is provided with an annular air supply duct 12, and extends to upper branching holder 4 tops always, and grommet type seals 8 and 9 sealings are adopted in upper and lower supporting base air flue junction; Lower support seat center is provided with annular bolting bearing 21, and screw thread 18 is carved with in the inboard; Joint bolt 1 passes the bolt bearing that rubber diaphragm and upper bracket center annular bolt collar 22 enter the undersetting center, with screw thread upper and lower bearing is linked together, the upper branching holder top is provided with annular water blocking ring groove 17, arch rubber diaphragm 2 bags cover on the arch upper branching holder, the diaphragm center has a circular bolt holes, be provided with a grommet type seals 3 between diaphragm bolt hole and upper branching holder bolt sleeve nozzle, diaphragm inner surface center also is provided with in the annular recesses 17 that an annular water blocking ring 5 is embedded in the upper branching holder central airway outside; There is a bowl-type lower support seat 7 that cooperates with it diaphragm upper branching holder 4 belows of present embodiment, lower support seat 7 centers are provided with bolted bearing 21 and annular air channel 12, on, the lower support seat connects with bolt 1, following inwardly contraction the in the upper branching holder outside also extends to form ring limit 19 downwards, the dome-shaped diaphragm outer lower portion is inwardly shunk, being provided with certain thickness annular sealing strip 20 just in time is embedded in, in the groove that lower support seat junction forms, the upper outside of lower support seat is carved with outside screw 23, internal thread 24 is carved with in diaphragm clamping ring 6 bottoms, clamping ring top is enclosed within on the diaphragm-operated lower periphery, the clamping ring bottom is fixed on the lower support seat with engage thread, so just the annular sealing strip 20 of rubber diaphragm is fixed between undersetting and forms hermetic seal.Be provided with imperforate section at the diaphragm center, the thickness of imperforate section is greater than aperture area, the annular seal strip that blocks water is set at the imperforate section edge of diaphragm internal surface, the gas distribution micropore is not offered in water blocking ring inboard, arch rubber diaphragm center, inboard diaphragm thickness is greater than the outside, micropore 16 is the concentric(al) circles levels and is staggered on dome-shaped diaphragm, progressively increase to lower periphery density by the top, micropore 16 is approximate rectangular on dome-shaped diaphragm, micropore minor face otch is along the arcuate arc face tilt, the airtight performance of micropore in the time of can improving aerator time-out aeration, the staggered up and down overlap joint of otch can more effectively stop water body to flow backwards during cut closure.

Claims

1, a kind of diaphragm type arch micro-hole aerator, it mainly comprises the supporting base of being made up of upper and lower supporting base, on supporting base, be provided with the elastic caoutchouc diaphragm of micropore, in supporting base, be provided with air supply duct to the diaphragm air feed, it is characterized in that: diaphragm Bao Meng is on upper branching holder, diaphragm-operated top and lower periphery are fixed, and top center is the arched surface diaphragm that has standing bolt, and air supply duct is an annular.

2, micro-hole aerator according to claim 1, it is characterized in that: the diaphragm top is provided with standing bolt, be provided with bolt collar at upper branching holder, the bolted of this nut sleeve and lower support seat, the diaphragm lower periphery adopts clamping ring to fix, be provided with sealing-ring between diaphragm top bolt hole and the upper branching holder bolt collar hole, be provided with grommet type seals between upper and lower supporting base annular air channel, be provided with the seal strip of inwardly turning up in the diaphragm lower periphery.

3, micro-hole aerator according to claim 1 is characterized in that: the upper and lower supporting base of diaphragm centre is provided with an annular air supply duct, and extends to the upper branching holder top always.

4, micro-hole aerator according to claim 1 is characterized in that: the upper branching holder top is provided with annular water blocking ring groove.

5, micro-hole aerator according to claim 1 is characterized in that: there is a bowl-type lower support seat that cooperates with it diaphragm upper branching holder below, and lower support seat center is provided with bolted bearing and annular air channel, and upper and lower supporting base connects with bolt.

6, micro-hole aerator according to claim 1 is characterized in that: be provided with imperforate section at the diaphragm center, the thickness of imperforate section is greater than aperture area, and the annular seal strip that blocks water is set at the imperforate section edge of diaphragm internal surface.

7, micro-hole aerator according to claim 1 is characterized in that: micropore is approximate rectangular on dome-shaped diaphragm, and micropore minor face otch is along the arcuate arc face tilt.

8, micro-hole aerator according to claim 1 is characterized in that: micropore is the concentric(al) circles levels and is staggered on dome-shaped diaphragm, progressively increased to lower periphery density by the top.