CN101434434B - Reverse umbrella type oxidation ditch aeration machine impeller structure - Google Patents

Reverse umbrella type oxidation ditch aeration machine impeller structure Download PDF

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Publication number
CN101434434B
CN101434434B CN2007101763965A CN200710176396A CN101434434B CN 101434434 B CN101434434 B CN 101434434B CN 2007101763965 A CN2007101763965 A CN 2007101763965A CN 200710176396 A CN200710176396 A CN 200710176396A CN 101434434 B CN101434434 B CN 101434434B
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China
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cone
impellers
oxidation ditch
blade
impeller
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CN2007101763965A
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CN101434434A (en
Inventor
施汉昌
施慧明
刘艳臣
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Tsinghua University
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Tsinghua University
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81Aquaculture, e.g. of fish
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

The invention belongs to the technical field of sewage treatment plant manufacturing in environmental protection, more particularly relates to the structure of impellers of an inverted umbrella type oxidation ditch aeration machine. The main structure is an inverted cone with a bottom included angle being 140 degree, 8 impellers are embedded on the cone surface of the cone body all together, the blades of the impellers are perpendicular to the cone surface, and the impellers include 4 short-blade impellers and 4 small-blade impellers; and the 4 short-blade impellers and the 4 small-blade impellers are alternately arranged with equal spaces. Part of the blades at the lower part of the short-blade impeller are prolonged directly so as to stir fluids at the bottom, increase the up-and-down cycling speed and the horizontal flowing speed of sewage, and improve three functions of the aeration machine, that is, oxygenizing, stirring and plug-flowing. Compared with the present structure, the structure is more effective and can be applied more widely to the aeration and plug-flowing of a deep oxidation ditch.

Description

A kind of structure of reverse umbrella type oxidation ditch aeration machine impeller
Technical field
The invention belongs to sewage disposal device manufacturing technology field in the environmental protection.Be particularly related to a kind of structure of reverse umbrella type oxidation ditch aeration machine impeller.Specifically; This technology is mainly used in oxidation ditch process technological transformation, aerator upgrading and the process optimization design of adopting surface aeration; Novel aerator can satisfy the equipment requirements of novel oxidation ditch process; Strengthen aeration and plug-flow effect, promote the treatment efficiency of oxidation ditch, can also reduce the operation energy consumption of oxidation ditch aeration equipment simultaneously.
Background technology
And municipal sewage treatment is one of energy-intensive industry, and in the operating cost of the municipal sewage plant of routine (comprising depreciation cost etc.), the electricity charge account for more than 1/3rd.And the aeration power consumption accounts for 40%~50% of full factory of sewage treatment plant power consumption in the sewage biological treatment system.High power consumption has caused sewage treatment facility operating cost high on the one hand; On the other hand, high power consumption has also increased the weight of the energy crisis of China's present stage.Research and development can realize the technology and equipment that sewage treatment plant is energy-saving and cost-reducing, and the present energy crisis of China is significant for alleviating.
Aerator is as plant equipment most crucial in the oxidation ditch treatment process; It is one of key that influences oxidation ditch treatment effeciency, energy consumption and stability; They not only have functions such as oxygenation, promotion, mixing concurrently, are also determining ditch type, floor space and the capital expenditure of oxidation ditch.The surface aeration equipment that uses in the oxidation ditch mainly contains the brush aeration machine; The rotating disk aerator; Vertical axis (inversed umbrella type, pump type) surface aeration machine; Wherein inversed umbrella type surface aeration machine and Carrousel oxidation ditch all are doctor's Pasveer inventions by Dutch DHV company in 1967, and its necessary electromotor power is 45kW.Dutch DHV company had released Carrousel 2000 type oxidation ditch systems in 1993, and the inversed umbrella type surface aerating machine power that is adopted is between 90kW to 1 60kW, impeller diameter φ 3500 to φ 3750mm.DHV company had successfully developed Carrousel 3000 type oxidation ditch systems again in 1999, and the depth of water is brought up to 8m (but will adopt guide shell, consumes energy) by the 5m of common oxidation ditch, and floor space still less.Because Carrousel oxidation ditch technology is fashionable for a time; Having emerged in large numbers leading company of a collection of inversed umbrella type surface aerating machine and products thereof abroad, mainly is Spaans-A type and the Spaans-B type surface aerating machine of falling the umbrella that the OXYRATOR inversed umbrella type surface aerating machine produced of U.S. EIMCO company and Dutch Spaans Babcock bv company produce.External inversed umbrella type surface aerating machine complete machine structure pattern is consistent basically, and the impeller Welding Structure is slightly different.And the waterpower geometric parameter of impeller, the cone angle of cone, blade are all very close.Domestic is that state auspicious environmental protection company once took the lead in developing pump type surface aerating machine series at home; Largest diameter 1930mm, peak power 55kW has developed more powerful surface aeration machine subsequently again; Largest diameter 4000mm; Peak power 132kW can supporting constant velocity type, two-speed type and three kinds of different motor drive systems of speed-regulating type, and foreign technology monopolization has been broken in the development of this type.Shown in Fig. 2-4, be the instance model of the concentrated aerator of the auspicious exploitation of state, the big impeller diameter 3m of each aerator, Fig. 2 are the double-deck inverted umbrella-shaped aeration machine of DS380, depth of immersion 3.19m, the lower end is the cross impeller, the long 0.96m of blade mainly plays the plug-flow effect; Fig. 3 uses more DS375 individual layer inverted umbrella-shaped aeration machine at present; Fig. 4 is a DSS-19Y wing disc type composite impeller aerator, depth of immersion 1.83m, and lower end small impeller radius 0.52m, 8 blades all have angle with axial and horizontal plane, play the effect of make progress plug-flow and adjusting streamline during rotation.
At present for the exploitation of aerator, development of new aerator deep water type combined impeller on the one hand makes the deep layer suction capactity of its plug-flow stirring capacity that has the inversed umbrella type impeller concurrently and pump type impeller, to satisfy the oxidation ditch process needs; Develop frequency-converting speed-governing control system on the other hand; The equipment of different driving pattern both can use separately; Use capable of being combined again, it is in service to oxygenic aeration and the different demands that stir plug-flow, when load variations causes that oxygen demand reduces to satisfy technology; One of the oxidation ditch process system or several surface aeration machines can stop or switching to lower rotating speed automatically under programme-control, can also change the power input through changing the impeller submergence simultaneously.
Summary of the invention
The blade wheel structure that the purpose of this invention is to provide a kind of reverse umbrella type oxidation ditch aeration machine; Its performance aspect aeration and plug-flow; Other version than present existing conventional aerator version is perhaps close is more efficient, is applicable to the aeration and the plug-flow process of deep water type oxidizing tank more.
The blade wheel structure of said reverse umbrella type oxidation ditch aeration machine is characterized in that, its agent structure is the cone of a upside-down mounting; Connect the axis of cone 2 below the conical surface 1 of cone, cone conical surface bottom angle is 140 °, and diameter is 2.8m; Inlay 8 impellers on the conical surface of cone altogether, blade is vertical with the cone surface.
Said 8 impellers are that the part on the axis of cone 2 is the wheel 3 that comes into leaves, and on the conical surface is 4,4 small impellers 6 of 4 short impellers; All impellers are perpendicular to cone surface and all be embedded on the cone, and short impeller 4 and little short impeller be 6 alternate, be spacedly distributed;
The partial blade that impeller directly will be lacked in said lower end of on the cone surface, lacking impeller 4 prolongs and becoming the wheel 3 that comes into leaves; The wheel 3 that comes into leaves extends to the top of the axis of cone 2 more always; Be fixed on the face of cylinder of the axis of cone 2, the coupling part is a circular arc, plays and stirs the bottom fluid; Increase the circulation rate up and down and the bottom horizontal flow sheet speed of sewage, oxygenation, stirring and the plug-flow three of promoting aerator act on greatly.
Coming into leaves on the said cone axis of cone 2 forms the groove 5 of semi arch between the wheel 3.
The invention has the beneficial effects as follows that the blade wheel structure with inversed umbrella type of the present invention is designed to compound impeller, the large-scale impeller of falling the umbrella on its upper strata is in rotary course, and water is the water curtain shape and throws away from short impeller blade and impeller 1 edge, wraps up in into a large amount of air, brings in constant renewal in liquid level.The partial blade that directly will lack impeller in the short impeller lower end on upper strata prolongs, and can stir the bottom fluid, increases the circulation rate up and down and the bottom horizontal flow sheet speed of sewage, and oxygenation, stirring and the plug-flow three of promoting aerator act on greatly.Simpler than existing double-deck blade wheel structure aerator aspect Machine Design and making, the mechanical strength and the durable life-span of equipment are higher simultaneously.More efficient than existing version, be applicable to the aeration and the plug-flow of deep water type oxidizing tank more.
Description of drawings
Fig. 1 is an inverted umbrella-shaped aeration machine illustraton of model of the present invention.
Fig. 2-4 is the instance model of the concentrated aerator of the auspicious exploitation of state.(wherein Fig. 2 is the double-deck inverted umbrella-shaped aeration machine of DS380.Fig. 3 is the individual layer inverted umbrella-shaped aeration machine.Fig. 4 is a DSS-19Y wing disc type composite impeller aerator)
Fig. 5 is a reverse umbrella type oxidation ditch aeration machine impeller structural entity shape sketch map
Fig. 6 is that the A of Fig. 5 is to view.
Fig. 7 is a reverse umbrella type oxidation ditch aeration machine impeller structure vertical view.
Fig. 8 is the analog computation middle section flow velocity contrast of four kinds of types.(type wherein is: 1, Dss-19Y; 2, Ds380; 3, the design; 4, individual layer)
Embodiment
The present invention provides a kind of blade wheel structure of reverse umbrella type oxidation ditch aeration machine, shown in Figure 1ly is the global shape illustraton of model of inverted umbrella-shaped aeration machine of the present invention.Fig. 5 is a reverse umbrella type oxidation ditch aeration machine impeller structural entity shape sketch map.Belong to compound impeller.Fig. 6 is that the A of Fig. 5 is to view.Fig. 7 is a reverse umbrella type oxidation ditch aeration machine impeller structure vertical view.
The blade wheel structure of said reverse umbrella type oxidation ditch aeration machine; Its agent structure is the cone of a upside-down mounting; Connect the axis of cone 2 below the conical surface 1 of cone, cone conical surface bottom angle is 140 °, and diameter is 2.8m; Inlay 8 impellers on the conical surface of cone altogether, said 8 impellers are on the conical surface, to be 4,4 small impellers 6 of 4 short impellers; All impellers are perpendicular to cone surface and all be embedded on the cone, and short impeller 4 and little short impeller are 6 alternate, (like Fig. 6, shown in 7) is spacedly distributed; The partial blade that directly will lack impeller for the lower end of short impeller 4 on cone surface in the part on the axis of cone 2 prolongs and becoming the wheel 3 that comes into leaves; The wheel 3 that comes into leaves extends to the top of the axis of cone 2 more always, is fixed on the face of cylinder of the axis of cone 2, is mutually 90 °; The coupling part is a circular arc; Play and stir the bottom fluid, increase the circulation rate up and down and the bottom horizontal flow sheet speed of sewage, oxygenation, stirring and the plug-flow three of promoting aerator act on greatly.
Coming into leaves on the said cone axis of cone 2 forms the groove 5 (like Fig. 5,6, shown in 7) of semi arch between the wheel 3.
Wheel 3 the width that comes into leaves is 0.6m.Inversed umbrella type short impeller 4 diameters in upper strata are 3m, and submergence is 2.0m, and width of blade is 0.10m.
The making of the impeller of this reverse umbrella type oxidation ditch aeration machine mainly comprises following several aspect.
1. aeration machine impeller technological design according to above-mentioned aerator sized data, can be selected different diameter ranges, and the dimension scale according to correspondence designs then.
2. the angle between the conical section conical surface is 140 °, and axis part lower end prolongs out one section, and length is confirmed according to the dimension scale of aerator.
3. the impeller form of aerator comprises 8 altogether; On cone surface 1; Be divided into 4 small impellers 6 and 4 short impellers 4, impeller is perpendicular to cone surface 1 and all be embedded on the cone, and the partial blade that impeller directly will be lacked in the lower end of 4 short impellers 4 on cone surface 1 prolongs that becoming comes into leaves takes turns 3; The wheel 3 that comes into leaves extends to the top of the axis of cone 2 more always, is fixed on the face of cylinder of the axis of cone 2.The distribution form of 8 impellers be the short impeller of 4 small impellers 6 and 44 alternate, be spacedly distributed, and the impeller of same type all is to be symmetrically distributed.
The configuration of this aerator belongs to compound impeller, and its operation principle is that the upper strata is the large-scale impeller of falling the umbrella, and in rotary course, water is the water curtain shape and throws away from blade edge, wraps up in into a large amount of air, brings in constant renewal in liquid level.The impeller lower end directly prolongs the partial blade of big impeller on the upper strata, can stir the bottom fluid, increases the circulation rate up and down and the bottom horizontal flow sheet speed of sewage, and oxygenation, stirring and the plug-flow three of promoting aerator act on greatly.
Embodiment 1
According to aerator size shown in Figure 5, with dwindle 40 times of this aerator, make the aerator model (shown in Figure 1) of same version, equally also three kinds of aerators with the auspicious exploitation of state are made into aerator model (shown in Fig. 2-4) according to same reduced scale.Utilize this aerator model in the oxidation ditch of lab scale model, to carry out the fluidised form test, the result shows that the plug-flow of this aerator and aerator performance all are better than other three kinds of aerator versions (table 1).
The contrast of table 1 lab scale model flow velocity
Upper strata horizontal velocity upper vertical speed lower floor horizontal velocity lower vertical speed
The present invention 0.00032757-0.020277-0.0076853-0.0068225
The raceway groove at the upper reaches
Ds380 -0.00028131 -0.023339 -0.0059433 -0.0089323
Middle near exposing to the sun
Individual layer 0.00032757-0.020277-0.0076853-0.0068225
The mechanism of qi position
Dss-19Y -0.00092355 -0.020536 -0.006789 -0.0082379
Upper strata horizontal velocity upper vertical speed lower floor horizontal velocity lower vertical speed
The present invention-0.0050527 0.022416-0.0079947 0.0089727
The raceway groove at the upper reaches
Ds380 -0.0058515 0.022911 -0.008699 0.0099616
Middle away from exposing to the sun
Individual layer-0.0050527 0.022416-0.0079947 0.0089727
The mechanism of qi position
Dss-19Y -0.0051179 0.021606 -0.0085623 0.0089533
Upper strata horizontal velocity upper vertical speed lower floor horizontal velocity lower vertical speed
The present invention 0.023211-0.01769 0.018458-0.0065345
The raceway groove in downstream
Ds380 0.021693 -0.01444 0.019805 -0.0045168
Middle near exposing to the sun
Individual layer 0.023211-0.01769 0.018458-0.0065345
The mechanism of qi position
Dss-19Y 0.022382 -0.014519 0.016876 -0.0045377
Upper strata horizontal velocity upper vertical speed lower floor horizontal velocity lower vertical speed
The present invention 0.015119 0.016905 0.022678 0.0061008
The raceway groove in downstream
Ds380 0.016744 0.018459 0.02054 0.0073743
Middle away from exposing to the sun
Individual layer 0.015119 0.016905 0.022678 0.0061008
The mechanism of qi position
Dss-19Y 0.014641 0.016321 0.019957 0.0066026
Embodiment 2
Auspicious other aerator of three kinds of aerator and state of this kind version is carried out the constructed experiment of actual oxidation ditch; Utilize the Fluid Mechanics Computation model that the plug-flow and the aeration performance of the aerator of actual size structure are simulated; Can find out from test result; The performance of the aerator configuration that this invention proposed is better than the performance of above-mentioned three kinds of aerator configurations; Under the condition of identical rotating speed and input power, the mean flow rate and the power output at the different cross section in oxidation ditch centre position of the aerator of this configuration will be higher than other aerator of three types (Fig. 8, table 2).
Table 2 power output relatively
Type Ds380 Dss-19Y The present invention Individual layer
Power (kW) 84.8 82.9 95.14 78.5
The multiple of individual layer aerator power 1.08 1.056 1.21 1

Claims (3)

1. the blade wheel structure of a reverse umbrella type oxidation ditch aeration machine, its agent structure is the cone of a upside-down mounting, connects the axis of cone below the conical surface of cone; It is characterized in that; Cone conical surface bottom angle is 140 °, and diameter is 2.8m, inlays 8 impellers on the conical surface of cone altogether; Blade is vertical with the cone surface, and coming into leaves on the cone axis of cone forms the groove of semi arch between the wheel; The short impeller on cone surface and the coupling part of coming into leaves between the wheel of prolongation are semicircular arc.
2. according to the blade wheel structure of the said reverse umbrella type oxidation ditch aeration machine of claim 1, it is characterized in that said 8 impellers are on the conical surface, to be 4 short impellers, 4 small impellers; All impellers are perpendicular to cone surface and all be embedded on the cone, and short impeller is alternate with little short impeller, be spacedly distributed.
3. according to the blade wheel structure of the said reverse umbrella type oxidation ditch aeration machine of claim 1; It is characterized in that said partial blade in the lip-deep short impeller of cone lower end directly prolongs and becomes the wheel that comes into leaves, the wheel that comes into leaves extends to the top of the axis of cone more always; Be fixed on the face of cylinder of the axis of cone; Play and stir the bottom fluid, increase the circulation rate up and down and the bottom horizontal flow sheet speed of sewage, oxygenation, stirring and the plug-flow three of promoting aerator act on greatly.
CN2007101763965A 2007-10-26 2007-10-26 Reverse umbrella type oxidation ditch aeration machine impeller structure Expired - Fee Related CN101434434B (en)

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CN2007101763965A CN101434434B (en) 2007-10-26 2007-10-26 Reverse umbrella type oxidation ditch aeration machine impeller structure

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Application Number Priority Date Filing Date Title
CN2007101763965A CN101434434B (en) 2007-10-26 2007-10-26 Reverse umbrella type oxidation ditch aeration machine impeller structure

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CN101434434B true CN101434434B (en) 2012-05-16

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106186299B (en) * 2016-09-09 2019-04-02 江苏大学 Inverted umbrella aerator
CN112425553B (en) * 2020-11-23 2022-04-15 德清瓜山水产养殖有限公司 Make things convenient for aquaculture to use rotatory waste fitting discharging

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Inventor after: Liu Yanchen

Inventor after: Shi Hanchang

Inventor after: Shi Huiming

Inventor before: Shi Hanchang

Inventor before: Shi Huiming

Inventor before: Liu Yanchen

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Granted publication date: 20120516

Termination date: 20201026