Active sludge surface type gas stripping micro power reflux apparatus

An activated sludge and micro-power technology, applied in water/sludge/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc. Efficiently complete the reflux task, not suitable for the balanced and timely reflux of the suspended activated sludge layer, etc., to achieve the effects of high energy consumption, ensuring consistency, and long reflux routes

Active Publication Date: 2015-06-24
WUHAN PURGELON ENVIRONMENTAL ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These return devices are not suitable for the balanced and timely return of large-area suspended activated sludge layers. Type air stripping device cannot complete the backflow task efficiently

Method used

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  • Active sludge surface type gas stripping micro power reflux apparatus
  • Active sludge surface type gas stripping micro power reflux apparatus
  • Active sludge surface type gas stripping micro power reflux apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In the following, the present invention will be further described by referring to the accompanying drawings and using the activated sludge surface-type air-lift micro-power reflux device of the present invention as an example in conjunction with a certain urban sewage treatment.

[0027] From figure 1 and image 3 It can be seen from the figure that the reflux device is mainly composed of a horizontal air intake pipe 1, a closed suction pipe 2 connected horizontally and vertically, a closed box 3 located above the middle of the suction pipe, an air nozzle 4 located in the box, and The standpipe elbow 5, the return inclined pipe 6 and the return wall pipe 7 are composed, and are controlled by the compressed air control device 8 outside the pool.

[0028]Each horizontal dredge pipe 2 is provided with a mud inlet hole 9, and the diameter of the mud inlet hole is generally in the range of 15mm to 40mm. The cross-sectional area at the location is greater than the sum of th...

Embodiment 2

[0030] The sewage treatment capacity of a sewage treatment plant is 12,000 m 3 / d, there are 2 towers of 6000m each 3 / d V-type air-lift integrated sewage treatment tank, the surface-type air-lift micro-dynamic reflux device of the present invention is used to reflux the suspended activated sludge in the clarification area of ​​the integrated tank, and a total of 2 sets of air-lift reflux devices are installed, each Set air consumption 0.995m 3 / min, the converted blower power consumption is 1.456Kw (single blower parameter Q=16.67 m 3 / min, P=58.8kPa, equipped with a 30kW motor with a frequency conversion device, the actual shaft power is 24.4kW), and a good activated sludge return effect and sewage treatment effect have been obtained. The water quality is shown in the table below.

[0031] Inlet and effluent water quality table for design of sewage treatment plant

[0032] project COD BOD 5 SS TN NH 3 -N TP Influent water quality (mg / L) 300 ...

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Abstract

The present invention provides a surface type gas stripping micro power reflux apparatus for refluxing suspension and concentration active sludge. The surface type gas stripping micro power reflux apparatus comprises a gas inlet pipe, end head sealing mud suction pipes, a periphery closing box, an air nozzle, a vertical pipe elbow, a reflux inclined pipe, a reflux penetrating-through-wall pipe and a tank-external compress air control device, wherein a plurality of small holes are uniformly distributed on the mud suction pipe, the mud suction pipes are aligned in a horizontal longitudinal-transverse communication manner, and are assembled in the closing box on the middle portion position, the air nozzle is arranged inside the box, the top of the box is connected with the vertical pipe elbow, and the pipe bottom of the outlet of the reflux penetrating-through-wall pipe is slightly lower than or the same as the water surface. The surface type gas stripping micro power reflux apparatus has the following characteristics that: the structure is delicate and simple; and compared with the conventional submersible sludge discharge pump, the penetrating-through-wall reflux pump or the point-type gas stripping reflux device, and the like, the surface type gas stripping micro power reflux apparatus has characteristics of high reflux efficiency, balancing with no dead angle, no damage on the active sludge floc structure, flexible and efficient reflux control, application of a sewage treatment plant aeration air blower to supply gas, extreme low converted gas stripping energy consumption, no movement part and electrical equipment under water, and high reliability.

Description

technical field [0001] The invention relates to an activated sludge reflux device, in particular, it utilizes the principle of aerodynamics, air lift and buoyancy, and utilizes the uniform structure of perforated suction pipes on the horizontal plane to realize the comprehensive and balanced return of high-efficiency suspended concentrated activated sludge. Surface air lift micro power reflux device. Background technique [0002] Among the current sewage treatment methods, the activated sludge method is still the most widely used secondary biological treatment process in the world. After the sewage undergoes secondary biochemical treatment through the aeration tank, it generally needs to enter the secondary sedimentation tank for mud-water separation, clean water disinfection and discharge, and the settled sludge is returned to the aeration tank for reuse through the sludge return pump, and a small part of the sludge Concentrated and dehydrated as excess sludge. In the ear...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/00
Inventor 刘贤斌李路刘学阳
Owner WUHAN PURGELON ENVIRONMENTAL ENG TECH
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