CN201372226Y

CN201372226Y - Double-impeller submerged aerator

Info

Publication number: CN201372226Y
Application number: CN200820217554U
Authority: CN
Inventors: 李维斌; 吴春笃; 朱荣生
Original assignee: Jiangsu University
Current assignee: Jiangsu University
Priority date: 2008-12-02
Filing date: 2008-12-02
Publication date: 2009-12-30
Anticipated expiration: 2018-12-02

Abstract

The utility model discloses a double-impeller submerged aerator, which is suitable for submerged aeration and oxygen filling in sewage treatment. After being energized, a submersible motor (4) drives an air impeller (10) and a water impeller (11) to rotate at a high speed; the air impeller (11) sucks out water in an air inlet pipe (3) and an air box (6) during rotating at the high speed for forming negative pressure in the air box (6), so external air can enter the air box (6) through the air inlet pipe (3), and under the action of the air impeller (10), the air can be filled into the water in a mode of tiny bubbles after passing through an arc-shaped baffle plate (9) arranged at an outlet of the impeller; simultaneously, under the action of the water impeller (11), the water carries the tiny bubbles to flow through the water impeller (11); under the agitation, the bubbles in the water are cut into bubbles with smaller sizes; simultaneously, a mixture of the air and the water is in violent and impingiment flow in a buffer chamber (12), so the air and the water are mixed more uniformly; and finally, the mixture of the air and the water crushes into sewage through a diversion outlet (14) of a lower casing (13) at a certain speed, and the produced bubbles are smaller and more uniform, and have higher oxygen content.

Description

Aerator under a kind of bilobed wheel liquid

Technical field

The utility model relates to the aeration aerating device in a kind of sewage disposal, refers in particular to aerator under a kind of bilobed wheel liquid.

Background technology

At present domestic and international more than 90% municipal effluent and about 50% industrial organic sewage all adopt activated sludge process to handle.Need a large amount of dissolved oxygens in the biological process of Wastewater Treated by Activated Sludge Process sewage, aeration aerating becomes the core link that carries out biochemical treatment.Aerating apparatus can be divided into mechanical aeration device, blast aeration system, hydraulic shear formula aerating apparatus, water impact formula aerating apparatus etc.

Above-mentioned aerating apparatus is widely used in sewage disposal, but weak point is separately arranged all, for the mechanical aeration device, Chinese utility model patent as patent No. ZL200520135925.3 (CN2837298Y), just announced a kind of inverted umbrella-shaped aeration machine, scraping the water plug-flow by the impeller blade holds under the arm and wraps up in air, make in the air oxygen dissolution in sewage, blade bump water causes bubble to break, flow to confusion, and be difficult to behind the surface dissolution oxygen saturation improve again, cause the aeration effect bad, bubble is big, and dynamic efficiency is low.Common blast aeration machine needs gas blower that air is pressed into aerator under the liquid, effect by aerator under the liquid is diffused in the water again, complex structure, energy consumption is big, and is arranged in the sewage communicating pipe of blast aeration system, diffuser tube, as the Chinese utility model patent of patent No. ZL00265888.7 (CN2455711 Y), just announced combined type aerator under water, inconvenience is safeguarded in corrosion-vulnerable such as communicating pipe, diffuser tube and obstruction, and coefficient of oxygen utilization is low.For jet and water impact aerating apparatus,, just announced jet-Roots type aerator as the Chinese utility model patent of patent No. ZL03277595.4 (CN CN2648143Y), though coefficient of oxygen utilization height, but it is bigger to consume energy, and dynamic efficiency is not high, and aeration is inhomogeneous.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of bubble that makes to produce aerator under more tiny, even, oxygenation rate height and a kind of faster bilobed wheel liquid of oxygenation speed at the existing shortcoming of present aerator.Compare with traditional underwater jet aeration machine, aerator adopts the structure of bilobed wheel under the bilobed wheel liquid, can be with air from being drawn onto in the water, do not need to be its configuration gas blower, so one-piece construction is very compact, and noise is very little during operation, oxygenation speed is fast, the utilization ratio of oxygen and dynamic efficiency height.

The technical scheme that its technical problem that solves the utility model adopts is: aerator under a kind of bilobed wheel liquid, comprise cable, floating drum, inlet pipe, submersible machine, last shell, bellows are positioned at the impeller port ring that matches with the fan blade inlet side outside on the shell, be positioned at the impeller outlet curved baffle at impeller outlet place, fan blade, water impeller, surge chamber, the lower housing of band diversion outlet, cable links to each other with submersible machine, and submersible machine is installed in the shell, and floating drum is installed in shell upper, inlet pipe is fixed on the shell, link to each other with bellows, fan blade and water impeller are fixed on the motor shaft from top to bottom, are in respectively in shell and the lower housing.

Concrete mode of operation of the present utility model is: submersible machine energising back drives fan blade and water impeller high speed rotating, and fan blade is a mixed flow impeller, has the advantages that flow is big, lift is low, compares in the unit time with common runner and can carry a large amount of fluids.Can be during the fan blade high speed rotating with the water sucking-off in inlet pipe and the bellows, impeller port ring seals, anti-sealing flows into again in inlet pipe and the bellows, therefore, in bellows, form negative pressure behind the fan blade high speed rotating, extraneous a large amount of air will enter bellows along inlet pipe, and under the conveying of fan blade, the impeller outlet baffle plate of flowing through, baffle shapes and impeller outlet shape are in full accord, and the impeller outlet curved baffle is that thickness is less than the 3mm steel plate, evenly have diameter on the steel plate less than the 1mm aperture, this makes the air of carrying can become micro-bubble and pours in the sewage, forms even air-water mixture and flows into surge chamber, prevents to produce big air bolus.Water impeller is also in the surge chamber inner rotation simultaneously, the air-water mixture that transports from fan blade with certain velocity flow through water impeller, water impeller is the submersible agitator runner, main plaing stirs and the plug-flow effect, under its stirring, plug-flow effect, bubble is more tiny by the stirring of water impeller blade, cutting, thereby sneak in the sewage more uniformly, air-water mixture is in surge chamber high turbulences more then, sentence certain speed outflow from the lower housing of aerator bottom band diversion outlet at last, thereby reach the effect of aeration aerating.

The beneficial effects of the utility model are, compare with existing technology, and this type aerator apparatus structure is simple, and is easy for installation, and bubble is more tiny, even, and oxygenation rate height and oxygenation speed are faster, and noise is very little during operation, the dynamic efficiency height.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is that device of the present utility model is always schemed, 1. cables among the figure, 2. floating drum, 3. inlet pipe, 4. submersible machine, 5. go up shell, 6. bellows, 7. impeller port ring, 8. motor shaft, 9. impeller outlet curved baffle, 10. fan blade, 11. water impellers, 12. surge chambers, 13. lower housings 14, diversion outlet.

Fig. 2 is fan blade and impeller outlet curved baffle interface chart; Fig. 3 is an impeller outlet curved baffle floor map.

Embodiment

As shown in fig. 1, aerator under a kind of bilobed wheel liquid comprises cable 1, floating drum 2, inlet pipe 3, submersible machine 4, last shell 5, bellows 6, impeller port ring 7, motor shaft 8, impeller outlet curved baffle 9 is fixed on fan blade 10 and water impeller 11 on the motor shaft 8, surge chamber 12, lower housing 13, diversion outlet 14.The utility model drives fan blade 10 and water impeller 11 high speed rotating in submersible machine 4 energising backs, and fan blade 10 is a mixed flow impeller, has the advantages that flow is big, lift is low, compares in the unit time with common runner and can carry a large amount of fluids.Can be during fan blade 10 high speed rotating with the water sucking-off in inlet pipe 3 and the bellows 6, wherein inlet pipe 3 imports are on liquid level, impeller port ring 7 seals, anti-sealing flows into again in inlet pipe 3 and the bellows 6, therefore, in bellows 6, form negative pressure behind fan blade 10 high speed rotating, extraneous a large amount of air will enter bellows 6 along inlet pipe 3, and under the conveying of fan blade 10, the impeller outlet curved baffle 9 of flowing through, structure is as shown in Figure 2, baffle shapes and impeller outlet shape are in full accord, impeller outlet curved baffle 9 be thickness less than the 3mm steel plate, evenly have diameter on the steel plate less than the 1mm aperture, structure as shown in Figure 3, this makes the air of carrying can become micro-bubble and pours in the sewage, form even air-water mixture, flow into surge chamber 12, prevent to produce big air bolus.Water impeller 11 is also in surge chamber 12 inner rotation simultaneously, the air-water mixture that transports from fan blade 10 with certain velocity flow through water impeller 11, water impeller 11 is the submersible agitator runner, main plaing stirs and the plug-flow effect, in its stirring, under the plug-flow effect, bubble is stirred by water impeller 11 blades, that cuts is more tiny, thereby sneak in the sewage more uniformly, air-water mixture is in surge chamber 12 high turbulences more then, the diversion outlet 14 of the lower housing 13 that links to each other with last shell 5 usefulness bolts from the aerator bottom flows out with certain speed at last, thereby reaches the effect of aeration aerating.

Claims

1, aerator under a kind of bilobed wheel liquid, comprise cable (1), floating drum (2), inlet pipe (3), submersible machine (4), last shell (5), bellows (6) are positioned at shell (5) and go up the impeller port ring (7) that matches with fan blade (10) the inlet side outside, are positioned at the impeller outlet curved baffle (9) in fan blade (10) exit, fan blade (10), water impeller (11), the lower housing (13) of band diversion outlet (14), cable (1) links to each other with submersible machine (4), submersible machine (4) is installed in the shell (5), floating drum (2) is installed in shell (5) top, and inlet pipe (3) is fixed on the shell (5), links to each other with bellows (6), fan blade (10) and water impeller (11) are fixed on the motor shaft (8) from top to bottom, are in respectively in shell (5) and the lower housing (13).

2, aerator under a kind of bilobed wheel liquid according to claim 1, it is characterized in that: described fan blade (10) is a mixed flow impeller.

3, aerator under a kind of bilobed wheel liquid according to claim 1, it is characterized in that: described impeller outlet curved baffle (9) shape and fan blade (10) outlet shape are in full accord, be the steel plate of thickness, evenly have diameter on the steel plate less than the 1mm aperture less than 3mm.

4, aerator under a kind of bilobed wheel liquid according to claim 1 is characterized in that: described water impeller (11) submersible agitator runner.