CN203021353U

CN203021353U - Flow-guide type submersible aerator capable of being used for oxidation ditch process in low-temperature environment

Info

Publication number: CN203021353U
Application number: CN201220720379XU
Authority: CN
Inventors: 赵军; 王卓; 王阳; 刘万杨; 宋剑锋; 何亚婷; 张黎; 李艳春; 闫佳; 杨彬
Original assignee: LIAONING BEIFANG ENVIRONMENTAL PROTECTION CO Ltd
Current assignee: LIAONING BEIFANG ENVIRONMENTAL PROTECTION CO Ltd
Priority date: 2012-12-24
Filing date: 2012-12-24
Publication date: 2013-06-26
Anticipated expiration: 2022-12-24

Abstract

The utility model belongs to the technical field of the manufacturing for sewage treatment equipment in environmental protection, particularly relates to a flow-guide type submersible aerator capable of being used for an oxidation ditch process in a low-temperature environment, and aims at solving the problems of water temperature reduction, much heat loss, high energy consumption and small ditch bottom flow-pushing power due to excessive stirring for a water surface, and inadaptability to an oxidation ditch process in a low-temperature environment, and the like of the existing surface aeration equipment. According to the flow-guide type submersible aerator, all water flow enters from a space above the flow-guide type submersible aerator, flows out from a space below an impeller through a flow guide cover, the downward flow generated by the rotation of the impeller breaks the air provided by an air outlet to generate micro-bubbles, thus generating a gas-water flow which is uniformly mixed. The flow-guide type submersible aerator disclosed by the utility model has the advantages of being good in flow-pushing effect, low in the quantity of devices, without the need of arranging a flow-pushing stirrer additionally, free from secondary pollution such as mist, water sound and odour, suitable for oxidation ditches with any shape and different depths, and the like, so that the oxidation ditches can also give full play to the functions in the low-temperature environment.

Description

A kind of guide flow type underwater aerator that can be used for oxidation ditch process under low temperature environment

Technical field

The utility model belongs to sewage disposal device manufacturing technology field in environment protection.Be particularly related to a kind of guide flow type underwater aerator for oxidation ditch.Characteristics are the oxidation ditch process that are applicable under the different types varying environment, particularly can satisfy the equipment requirements of oxidation ditch process to the aeration plug-flow under northern cold cool region low temperature environment.

Background technology

Oxidation ditch (Oxidation Ditch) technique, claim again the oxidation canal, it is a kind of deformation technique based on activated sludge process, have the advantages such as effluent quality is good and stable, excess sludge production is low, operational management is simple, therefore be applied in more and more in the urban sewage treatment system of various scales.

Oxidation ditch process mainly is comprised of water channel and aeration flow pulling equipment two portions, and wherein the aeration flow pulling equipment as the core mechanical means in oxidation ditch process, is one of key factor that affects oxidation ditch processing efficiency, energy consumption and stability.The function of guide flow type underwater aerator in oxidation ditch mainly contains three and select: 1 to the mixed solution oxygen supply; 2 make organic pollutant in mixed solution, active sludge, dissolved oxygen three fully mix, contact; 3 promote current circulates with certain flow velocity (being not less than 0.25m/s) Yan Chichang.Wherein, be thirdly oxidation ditch to the particular requirement of aerating apparatus, it keeps the technology characteristics aspect to have great importance to oxidation ditch.

At present, the aerator that uses in oxidation ditch process both at home and abroad is surface aeration equipment, mainly be divided into horizontal axial type and the large class of vertical shaft type two, the horizontal axial type surface aeration machine mainly contains and turns brush or rotating disk (or plate-spinning) aerator, and the vertical shaft type aerator mainly contains Float cylinder type vertical shaft surface aeration machine and inverted umbrella-shaped surface aerator etc.The characteristics of surface aeration machine are that oxygenation capacity is strong, and installation and maintenance are convenient.but the shortcoming of surface aeration has: the submergence of 1 present rotary aeration disc used is preferably 0.23～0.53m, rotary brush type surface aeration machine submergence is 0.3m, vertical shaft type aeration machine impeller submergence 0.04m left and right, the submergence of proof increase surface aeration equipment impeller and linear velocity help to increase the lifting head within the specific limits after deliberation, but excessive submergence and rotating speed can cause the decline of horizontal flow velocity, increase with the depth of water and can reduce the bottom of trench flow velocity, cause oxidation ditch top flow velocity larger, and bottom velocity is very little, cause a large amount of depositions of bottom of trench (deposition thickness 〉=1.0m) sometimes, reduced the useful volume of oxidation ditch, reduced treatment effect, 2 surface aeration machines easily splash larger spray or water smoke in the running, have corroded even electric control system of bearing support, motor on the one hand, have polluted again on the other hand the aisle on oxidation ditch both sides, 3 surface aeration heats run off many, and cooling is very fast, has reduced the water treatment effect, 4 surface aeration energy consumptions are large, plug-flow power is little, the excessive agitation water surface, cause the shortcomings such as water temperature descends and bubble disperses, foul smell disperses, especially in the north, water temperature in winter has had a strong impact on removal of pollutants about 10 degree, and environment is had a significant impact, and this is also the reason that oxidation ditch seldom uses at northern area.

The utility model content

Stir the water surface for solving existing surface aeration overequipment, cause that water temperature descends, heat runs off many, energy consumption is large, bottom of trench plug-flow power is little, be not suitable for the problem such as oxidation ditch process under low temperature environment, the purpose of this utility model is to provide a kind of guide flow type underwater aerator, it is effective that it has plug-flow, number of devices is few, does not need to arrange in addition pushing flow mixer, does not produce the secondary pollutions such as the spittle, the underwater sound and foul smell, can deepen the advantages such as the oxidation ditch degree of depth, and be applicable to the oxidation ditch process under various environment.Concrete scheme is as follows:

A kind of guide flow type underwater aerator that can be used for oxidation ditch process under low temperature environment, described aerator is arranged under the liquid level of oxidation ditch; Described aerator comprises pod, and the upper end of described pod is water-in, and the lower end of described pod is water outlet; Described water outlet is used for controlling the flow direction of current; Submersible machine and impeller are set in described pod, and described submersible machine drives described impeller by rotating shaft; Bottom at the water outlet of described pod arranges wind box, and the inlet mouth of described wind box is connected with gas blower by blast main; The air outlet of described wind box is arranged on the below of described water outlet;

Produce microbubble for what guarantee that rotation by impeller produces to the dirty air of smashing the air outlet and providing, described air outlet be positioned at described water outlet under;

For improving stirring capacity and oxygen dissolved efficiency and plug-flow effect, described aerator is arranged on the bottom of oxidation ditch.

The utlity model has following beneficial effect: 1 guide flow type underwater aerator simple structure, the setting of main part and taking-up all are easy to, and are convenient to guarantee and spot check; 2 comprise the pod structure, and current are flowed into by pod top, and flow out the below, balanced oxygen supply, and former water can short circuit, and water quality treatment is stable; 3 can freely switch to anaerobism stirs and aerobic stirring; 4 directly do not contact with open-air, can prevent that water temperature in winter from reducing too much, also can give full play to function at cold district; 5 arrange in the bottom of oxidation ditch, and stirring capacity and oxygen dissolved efficiency are all very high; 6 plug-flows are effective, and number of devices is few, do not need to arrange in addition pushing flow mixer; 7 do not produce the secondary pollutions such as the spittle, the underwater sound and foul smell; 8 later maintenance management are simple, and expense is low; 9 can corresponding any shape oxidation ditch, change that can corresponding water level can arbitrarily change shape and the degree of depth of oxidation ditch.

Description of drawings

Accompanying drawing is the structural representation of the utility model guide flow type underwater aerator;

In figure: 1 submersible machine, 2 pods, 3 blast mains, 4 wind boxs, 5 impellers, 6 air outlets, 7 gas blowers.

Embodiment

As shown in Figure 1, aerator of the present utility model is arranged under the liquid level of oxidation ditch; Described aerator comprises pod 2, and the upper end of described pod 2 is water-in 21, and the lower end of described pod 2 is water outlet 22; Described water outlet 22 is used for controlling the flow direction of current; Interior submersible machine 1 and the impeller 5 of arranging of described pod 2, described submersible machine 1 drives described impeller 5 by rotating shaft; Bottom at the water outlet 22 of described pod 2 arranges wind box 4, and the inlet mouth of described wind box is connected with gas blower 7 by blast main 3; The air outlet 6 of described wind box 4 is arranged on the below of described water outlet 22;

Produce microbubble for what guarantee that rotation by impeller 5 produces to the dirty air of smashing air outlet 6 and providing, described air outlet 6 be positioned at described water outlet 22 under;

Principle of the present utility model is: after water entered from the top of pod, the downward current that produce through impeller 5 rotations were smashed the air that the air outlet provides and are produced microbubble, thereby produce the air water stream that mixes and limit along the pond length direction mobile by water outlet; Balanced oxygen supply, former water can short circuits, and water quality treatment is stable; Owing to directly not contacting with open-air, can prevent that water temperature in winter from reducing too much, also can give full play to function at cold district; Bottom at oxidation ditch arranges, and stirring capacity and oxygen dissolved efficiency are all very high, and plug-flow is effective, and number of devices is few, does not need to arrange in addition pushing flow mixer; The undercurrent setting does not produce the secondary pollutions such as the spittle, the underwater sound and foul smell; Oxidation ditch that can corresponding any shape, change that can corresponding water level can arbitrarily change shape and the degree of depth of oxidation ditch.

Claims

1. a guide flow type underwater aerator that can be used for oxidation ditch process under low temperature environment, is characterized in that, described aerator is arranged under the liquid level of oxidation ditch; Described aerator comprises pod, and the upper end of described pod is water-in, and the lower end of described pod is water outlet; Described water outlet is used for controlling the flow direction of current; Submersible machine and impeller are set in described pod, and described submersible machine drives described impeller by rotating shaft; Bottom at the water outlet of described pod arranges wind box, and the inlet mouth of described wind box is connected with gas blower by blast main; The air outlet of described wind box is arranged on the below of described water outlet.

2. guide flow type underwater aerator according to claim 1, is characterized in that, described air outlet be positioned at described water outlet under.

3. guide flow type underwater aerator according to claim 1, is characterized in that, described aerator is arranged on the bottom of oxidation ditch.