CN2592636Y

CN2592636Y - Efficient oxidation channel

Info

Publication number: CN2592636Y
Application number: CN03219109U
Authority: CN
Inventors: 韩宁
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-01-02
Filing date: 2003-01-02
Publication date: 2003-12-17
Anticipated expiration: 2013-01-02

Abstract

The utility model relates to a sewage disposal oxidation ditch, which belongs to the technical field of environmental protection sewage disposal facilities. The oxidation ditch is provided with a surface aerating machine which is arranged at the point of centers of a circle of some or all turning circular arcs of a loop or near the point of the centers of a circle of a loop; the utility model has the improvement that a partition wall of the oxidation ditch deflects towards the upstream of the rotating direction of a surface aerating machine impeller, and the end part of the partition wall is arranged at the position that the included angle of the tangential velocity direction of the outer circle of the surface aerating machine impeller capable of passing through the end point of the partition wall and the upstream straight way main water flow direction is less than or equal to 90 DEG. The utility model enables the included angle of the gap water flow direction generated between the surface aerating machine impeller and the oxidation ditch partition wall and the upstream straight way main water flow direction to be less than or equal to 90 DEG, and thus, main water flow is not butted any longer; the water flow velocity is increased, the water flow velocity of the whole loop is more reasonable to distribute, the mixing effect is improved, the phenomenon of regurgitation and the deposition of mud can be avoided, the processing effect of the oxidation ditch is improved, and the actual power consumption of daily run is reduced; simultaneously, the utility model has the advantage of high utilization rate of energy.

Description

High-efficiency oxidation ditch

Technical field

The utility model relates to a kind of biological sewage treatment facility---oxidation ditch, belongs to environment protection sewage treatment facility technical field.

Background technology

The oxidation ditch process sewage disposal technology is a kind of improvement of activated sludge process, belongs to a kind of special shape of extended aeration.As biological reaction tank, mixed solution circulates in circuit and reaches biological treatment effect this technology continuously with continuous circuit.Because its distinctive plurality of advantages has been widely used in municipal sewage treatment, industrial sewage processing etc.

Existing general oxidation ditch structure is (Shuan Gou is identical with many ditches principle, can analogize) as shown in Figure 1.Near circuit turning circular arc circle centre position (or circle centre position) at oxidation ditch is installed surface aeration machine, and the oxidation ditch partition wall is arranged on the axis.During operation, after sewage entered oxidation ditch from water-in (water inlet position can be adjusted as required), under the effect of surface aeration machine impeller, oxygenation also was blended in the circuit internal recycle with active sludge and flows.Because hydraulic detention time is long, sewage is finished in circuit tens times at least, and up to a hundred at most circulations are discharged by water outlet and carried out subsequent disposal.

The applicant finds, the partition wall Position Design of existing oxidation ditch is unreasonable, thereby directly have influence on the performance of surface aeration machine best efficiency, cause mixed solution flow velocity reduction in the ditch, it is poor to mix mixing effect, cause problems such as sludgd deposition, not only influence wastewater treatment efficiency, accumulate over a long period and also caused the huge waste of the energy.

As seen from Figure 2, the included angle A of interstitial water flow path direction that forms between impeller and partition wall during the surface aeration machine wheel rotation and upstream straight way master water (flow) direction is greater than 90 °, water (flow) direction is relative, this means that gap current and main current answer back to, and has disturbed flowing of main current.Thisly answer back to the rising that has directly caused local liquid level, thereby make the anti-flow phenomenon of water generates of surface aeration machine upstream.This anti-stream can reach tens meters even nearly hundred meters (referring to Fig. 3) in large-scale oxidation ditch, whole mud mixed liquid flow velocity descends in the oxidation ditch thereby cause, mix the whipping performance variation, severe patient also causes mud to deposit in the oxidation ditch regional area, makes oxidation ditch system can't normally move the effect that maybe can't reach designing treatment.In addition because the rising of surface aeration machine upper pond level causes the anti-stream of water, in some occasion, make part just enter the raw sewerage of oxidation ditch along with anti-stream from water-in, just do not discharge, directly influenced final outflow water water quality from the short stream of water outlet with main current thorough mixing and through the oxidation ditch biological treatment.

Consider from the energy utilization rate angle, anti-stream produces sizable resistance to main current, make it need keep the power consumption increase that oxidation ditch normally moves the interior mixed solution flow velocity of needed circuit and guarantees the mixing agitating function, promptly surface aeration machine is used for plug-flow and mixes the power consumption increase of stirring.

Summary of the invention

The purpose of this utility model is: at the problem that above prior art exists, propose a kind ofly can improve wastewater treatment efficiency, improve the high-efficiency oxidation ditch of energy utilization rate simultaneously.

In order to reach above purpose, high-efficiency oxidation ditch of the present utility model is installed surface aeration machine near its circuit turning circular arc circle centre position (or circle centre position), its improvements are: the oxidation ditch partition wall is to surface aeration machine wheel rotation direction upstream deflection, and the angle that the partition wall end is positioned at the surface aeration machine impeller outer garden tangential velocity direction that made its end points and upstream straight way master water (flow) direction is smaller or equal to 90 ° position.

When above-mentioned improvement of the present utility model makes the surface aeration machine rotation, the angle of interstitial water flow path direction that produces between impeller and the oxidation ditch partition wall and upstream straight way master water (flow) direction is smaller or equal to 90 °, thereby the gap current are no longer answered back to main current, whole flow velocity in the ditch improves as a result, flow velocity in the whole circuit distributes and more becomes reasonable, mixed effect improves, and has avoided the appearance of anti-flow phenomenon and the deposition of mud, has improved the treatment effect of oxidation ditch.Simultaneously, avoid the meaningless loss of energy, improved rate of energy.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is the organigram of existing oxidation ditch.

Fig. 2 is the interstitial water flow diagram of Fig. 1 oxidation ditch.

Fig. 3 is the anti-distributions synoptic diagram of Fig. 1 oxidation ditch.

Fig. 4 is the organigram of the utility model embodiment one.

Fig. 5 is the interstitial water flow diagram of Fig. 4 oxidation ditch.

Fig. 6 is the organigram of the utility model embodiment two.

Fig. 7 is the organigram of the utility model embodiment three.

Fig. 8 is the organigram of the utility model embodiment four.

Embodiment

Embodiment one

The high-efficiency oxidation ditch of present embodiment is single ditch unit, as shown in Figure 4.Be provided with water-in 2 and water port 3 (the entery and delivery port position can be adjusted as required) on the circuit 1 continuously.The turning circular arc circle centre position of circuit 1 one ends is installed surface aeration machine 4, the partition wall 5 of oxidation ditch is to surface aeration machine wheel rotation direction upstream deflection, and the included angle B that an end of partition wall 5 is positioned at the tangential velocity direction in the surface aeration machine impeller outer garden that made its end points and upstream straight way master water (flow) direction is less than 90 ° position (referring to Fig. 5).

During use, sewage enters oxidation ditch from water-in 2, under the biography oxygen of surface aeration machine 4, plug-flow, stirring action, with active sludge thorough mixing in the circuit, flows at the ditch internal recycle, through behind certain hydraulic detention time, is discharged by water outlet 3.Because the interstitial water flow path direction that produces between impeller and the oxidation ditch partition wall 5 and the included angle B of upstream straight way master water (flow) direction are less than 90 °, therefore can not answer back to main current forms anti-stream, but make the flow velocity in the circuit increase, mixed effect improves, avoid the deposition of mud, improved the treatment effect of oxidation ditch.Therefore, under the prerequisite that guarantees certain circuit flow velocity, the plug-flow energy consumption of surface aeration machine 4 reduces, and the actual power consumption during day-to-day operation reduces.

Embodiment two

The high-efficiency oxidation ditch of present embodiment as shown in Figure 6, its essential structure is identical with embodiment one.Difference is that this oxidation ditch is single ditch two-shipper pattern, promptly surface aeration machine 4 is installed respectively at the two ends of circuit 1 turning circular arc circle centre position, the included angle B that the two ends of oxidation ditch partition wall 5 lay respectively at the tangential velocity direction in the surface aeration machine impeller outer garden that made its end points and upstream straight way master water (flow) direction forms the runner along main water (flow) direction convergent less than 90 ° position between whole partition wall 5 and the oxidation ditch exterior wall.

Embodiment three

The high-efficiency oxidation ditch of present embodiment as shown in Figure 7, its essential structure is identical with embodiment one.Difference is that the part of oxidation ditch partition wall 5 is positioned on the axis of oxidation ditch, only near the part partition wall of surface aeration machine 4 to surface aeration machine impeller sense of rotation upstream oblique, the included angle B that is positioned at the tangential velocity direction in the impeller outer garden that made the partition wall end points and upstream straight way master water (flow) direction is less than 90 ° position.

The action effect of this embodiment high-efficiency oxidation ditch is suitable with embodiment one, does not give unnecessary details in addition.

Embodiment four

The high-efficiency oxidation ditch of present embodiment is compared with embodiment one as shown in Figure 8, is characterized in that oxidation ditch is a tricolpate, is the circuit structure of tortuous winding.Near some turning circular arc circle centre positions (or circle centre position) at circuit 1 are installed surface aeration machine 4 respectively.The included angle B that the end of oxidation ditch partition wall 5 is positioned at the tangential velocity direction in the surface aeration machine impeller outer garden that made its end points and upstream straight way master water (flow) direction is less than 90 ° position, between partition wall and the adjacent exterior wall, form the runner along main water (flow) direction convergent between the adjacent partition wall.Like this, when the hydro-flow thrust effect diminuendo left away gradually in 4 pairs of downstreams of surface aeration machine, produce the current booster action owing to cross section of fluid channel is gradually little, more become reasonable thereby the flow velocity of whole circuit is distributed.

In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of combination or equivalent transformation formation, all drop in the protection domain of the utility model requirement.

Claims

1. high-efficiency oxidation ditch, near the turning circular arc circle centre position of its continuous circuit or circle centre position, surface aeration machine is installed, it is characterized in that: the partition wall of described oxidation ditch is to surface aeration machine wheel rotation direction upstream deflection, and the angle that described partition wall end is positioned at the tangential velocity direction in the surface aeration machine impeller outer garden that made its end points and upstream straight way master water (flow) direction is smaller or equal to 90 ° position.

2. according to the described high-efficiency oxidation ditch of claim 1, it is characterized in that: described oxidation ditch is single ditch oxidation ditch, surface aeration machine is installed near the circuit turning circular arc circle centre position of one end or the circle centre position, and the angle that the end of the nearly surface aeration machine impeller of described partition wall is positioned at the tangential velocity direction in the surface aeration machine impeller outer garden that made its end points and upstream straight way master water (flow) direction is smaller or equal to 90 ° position.

3. according to the described high-efficiency oxidation ditch of claim 1, it is characterized in that: described oxidation ditch is single ditch oxidation ditch, near the circuit turning circular arc circle centre position at two ends or the circle centre position surface aeration machine is installed respectively, the angle that the two ends of described oxidation ditch partition wall lay respectively at the tangential velocity direction in the surface aeration machine impeller outer garden that made its end points and upstream straight way master water (flow) direction forms the runner along main water (flow) direction convergent smaller or equal to 90 ° position between whole partition wall and the oxidation ditch exterior wall.

4. according to the described high-efficiency oxidation ditch of claim 1, it is characterized in that: the part of described oxidation ditch partition wall is positioned on the axis of oxidation ditch, to impeller sense of rotation upstream oblique, the angle that is positioned at the tangential velocity direction in the impeller outer garden that made the partition wall end points and upstream straight way master water (flow) direction is smaller or equal to 90 ° position near the part partition wall of surface aeration machine impeller.

5. according to the described high-efficiency oxidation ditch of claim 1, it is characterized in that: described oxidation ditch is many ditches type (comprising two ditches), is the circuit structure of tortuous winding; The angle that one end of the nearly surface aeration machine impeller of described oxidation ditch partition wall is positioned at the tangential velocity direction in the impeller outer garden that made its end points and upstream straight way master water (flow) direction is smaller or equal to 90 ° position, between partition wall and the adjacent exterior wall, form the runner along main water (flow) direction convergent between the adjacent partition wall.