CN202201753U - High-efficiency energy-saving aerator - Google Patents

Abstract

The utility model mainly discloses a high-efficiency and energy-saving aerator, including a motor, a booster impeller, a shear impeller, a spiral impeller, and a venturi tube; the venturi tube includes an inlet contraction part, a cylindrical throat, and a conical diffusion section from top to bottom; the motor is located outside the upper end of the venturi tube, and the motor output shaft extends into the interior of the venturi tube, and the booster impeller located above the inlet contraction part, the shear impeller located below the conical diffusion section, and the spiral impeller below the shear impeller are installed from top to bottom; a water inlet is provided above the booster impeller in the venturi tube, and an air inlet for introducing outside air or oxygen is provided at the cylindrical throat of the venturi tube. The utility model is a high-efficiency and energy-saving aerator suitable for aerobic biological treatment, with high oxygenation efficiency, small dissolved oxygen bubbles, long residence time, and good energy-saving effect.

Description

High-efficiency energy-saving aerator

technical field

The utility model relates to the technical field of oxygen increasing equipment used in wastewater biological treatment and breeding process, in particular to a high-efficiency energy-saving oxygen increasing machine. the

Background technique

Water pollution is one of the major resource and environmental problems facing the world today. Wastewater mainly has the characteristics of sensory pollution, toxicity and hazards, and has a large degree of pollution to environmental water bodies. The aerobic microbial method has become the main treatment method for various biochemical wastewater due to its advantages of economy, safety, low pollutant threshold value, less residue, and no secondary pollution. the

However, during the treatment process, the concentration of some bacterial flora is very high, and its metabolic efficiency and oxygen consumption are very large. The oxygen exchange rate of the current ordinary aeration equipment is difficult to maintain the dissolved oxygen content in the water body. In the aeration reaction tank The dissolved oxygen concentration in the mainstream of the mixed liquid is usually kept at a low level of 1-2mg/L. To meet the oxygen required by the biochemical process, the number of aerators has to be increased, which greatly increases the processing cost. the

In order to solve the above problems, the inventor has designed a high-efficiency energy-saving aerator, and this case results from this. the

Utility model content

The main purpose of the utility model is to provide a high-efficiency energy-saving aerator suitable for aerobic biological treatment, which has the characteristics of high oxygenation efficiency, small dissolved oxygen bubbles, long residence time and good energy-saving effect. the

In order to achieve the above object, the utility model is realized through the following technical solutions:

High-efficiency energy-saving aerator, including motor, booster impeller, shear impeller, spiral impeller, Venturi tube; Venturi tube includes inlet constriction, cylindrical throat and conical diffusion section from top to bottom; the motor is located at On the outer side of the upper end of the Venturi tube, the output shaft of the motor extends into the inside of the Venturi tube. The booster impeller located above the inlet constriction, the shear impeller located below the conical diffuser section, and the shear impeller are installed in sequence from top to bottom. The lower spiral impeller; a water inlet is opened above the booster impeller in the Venturi tube, and an air inlet for introducing external air is provided at the cylindrical throat of the Venturi tube.

A water inlet grid is laid inside the water inlet. the

An intermediate grid is set between the shearing impeller and the spiral impeller. the

A water inlet deflector is arranged on the outside of the Venturi tube and above the water inlet. the

The lower bottom surface of the water inlet deflector forms an acute angle with the outer surface of the Venturi tube to form a diversion angle. the

The air inlet is in the tangential direction of the shearing impeller. the

The air intake duct is externally connected to an air intake pipe to introduce outside air. the

A water outlet deflector is arranged below the spiral impeller. the

The technical solution is realized as follows: the aerator is suspended on the water body, and the motor drives the booster impeller, the shearing impeller and the spiral impeller; The impeller is crushed and quickly pushed down through the gap between the front end of the booster impeller and the wall and enters the Venturi tube; as the liquid enters the throat of the Venturi tube, the pressure in the tube decreases, and the air/oxygen is released from the outside It is sucked in a large amount through the inlet pipe, enters the Venturi tube in a tangential direction through the inlet pipe, and the gas and water are mixed, and a large number of ultra-fine bubbles are generated by the shearing impeller. The liquid in this state flows through the grid, and after rectification, it passes through the spiral The impeller is shot into a deeper water body; because the buoyancy of these large numbers of ultramicro-bubbles is not enough to overcome the surface tension of the water body, they can stay in the water body for a long time; The suction inlet enters the aerator and is repeatedly treated to prolong its residence time in the water. the

After adopting the above scheme, the utility model has many beneficial effects:

1. The gas source of the utility model can be pure oxygen or air, which has strong versatility; 2. The utility model can have sufficient air intake under low pressure; 3. The dissolved oxygen bubbles are small and evenly dispersed. The residence time in water is longer, which significantly improves the oxygen transfer rate; 4. The utility model has high oxygenation efficiency, which can meet the oxygen demand of various wastewater aerobic biological treatment, accelerate microbial metabolism, save hydraulic residence time, and improve wastewater treatment. 4. The utility model has low energy consumption, stable performance, no blockage, and is easy to use; 5. It has a wide range of applications, including aerobic biological treatment of various wastewater, aquaculture, lake and river treatment.

Description of drawings

Fig. 1 is the structural representation of preferred embodiment of the utility model;

Detailed ways

In conjunction with the accompanying drawings, the preferred embodiments of the utility model are further described in detail. the

High-efficiency energy-saving aerator, the main components involved include motor 1, water inlet deflector 2, water inlet 3, water inlet grid 4, booster impeller 5, Venturi tube 6, shear impeller 7, intermediate grid 8 , spiral impeller 9, water outlet deflector 10, air inlet 11, motor output shaft 12, air inlet pipe 13. the

The Venturi tube 6 is a flow detection element that changes the velocity of the fluid flowing through the tube to generate a differential pressure by using a special-shaped tube. A water inlet 3 is arranged on the upper side wall of the inlet constriction part 61, and a water inlet grid 4 is laid inside the water inlet 3, and the bottom opening of the conical diffuser section 63 is the water outlet. the

The motor 1 is located outside the upper end of the Venturi tube 6 , and the output shaft 12 of the motor extends into the inside of the Venturi tube 6 . A booster impeller 5, a shearing impeller 7 and a helical impeller 9 are sequentially installed on the motor output shaft 12 from top to bottom. The booster impeller 5 is located below the water inlet 3 and above the constricted portion 61 of the inlet. Water enters the cavity from the water inlet 3, flows into the booster impeller 5 below and crushes. The shearing impeller 7 is located under the conical diffuser section 63 , and the spiral impeller 9 is located under the shearing impeller 7 , with an intermediate grid 8 sandwiched between them. the

The cylindrical throat 62 of the Venturi tube 6 is provided with an air inlet 11 on the chamber wall, and the installation direction of the air inlet 11 is the tangential direction of the shearing impeller 7 . The air intake duct 11 is externally connected with an air intake pipe 13 for introducing external air or oxygen. the

In order to make the gas stay longer or deeper in the water, a water inlet deflector 2 is arranged on the outside of the Venturi tube 6 and above the water inlet 3, and a water outlet deflector 10 is arranged below the spiral impeller 9 . The lower bottom surface of the water inlet deflector 2 forms an acute angle a with the outer surface of the Venturi tube 6, and the discharged gas is gradually introduced into the water inlet 3 along with the lower bottom surface of the water inlet deflector 2 for reuse. The water outlet deflector 10 has a high periphery and a low middle outlet, so that the internal gas-water mixture can concentrate and flow to the middle outlet, and be shot into a deeper water body by means of the helical impeller 9 . the

The working principle of the utility model is as follows:

When the utility model is in use, it is suspended on the water body, and the motor 1 drives the booster impeller 5, the shearing impeller 7 and the spiral impeller 9 to work. The liquid enters the cavity from the water inlet 3 after being filtered by the water inlet grid 4, is crushed by the booster impeller 5, and is quickly pushed down through the gap between the front end of the booster impeller 5 and the wall, and enters the Venturi tube 6; As the liquid enters the cylindrical throat 62 of the Venturi tube 6, the pressure in the Venturi tube 6 decreases, and the air/oxygen is sucked in a large amount from the outside through the intake pipe 13, and passes through the intake duct 11 to form a tangential The direction enters the Venturi tube 6, the air and water are mixed, and enter the shearing impeller 7, generating a large number of ultra-fine bubbles and existing in the liquid, the liquid in this state flows through the middle grid 8, and after rectification, it passes through the spiral impeller 9 are shot into deeper bodies of water.

Because the buoyancy of these large numbers of ultrafine bubbles is not enough to overcome the surface tension of the water body, they can stay in the water body for a long time. Some air bubbles with larger diameters are blocked by the water inlet deflector 2 during the ascent process, and enter the aerator again through the water inlet 3 with the water flow, and are reused to prolong their residence time in the water. the

The above-mentioned embodiments are only used to explain the utility model concept of the present utility model, but not to limit the protection of the utility model rights. Any non-substantial changes made to the utility model by using this concept should fall within the protection scope of the utility model . the

Claims (8)

1. The high-efficiency energy-saving aerator is characterized in that it includes a motor, a booster impeller, a shear impeller, a spiral impeller, and a Venturi tube; the Venturi tube includes an inlet contraction part, a cylindrical throat, and a conical tube from top to bottom. The motor is located outside the upper end of the Venturi tube, and the output shaft of the motor extends into the inside of the Venturi tube. The booster impeller above the inlet constriction and the shear impeller below the conical diffuser are installed in sequence from top to bottom. , and the helical impeller under the shearing impeller; a water inlet is opened above the booster impeller in the Venturi tube, and an air inlet for introducing outside air is provided at the cylindrical throat of the Venturi tube. 2. The high-efficiency energy-saving aerator according to claim 1, wherein a water inlet grid is laid inside the water inlet. 3. The high-efficiency energy-saving aerator according to claim 1, characterized in that: an intermediate grid is set between the shearing impeller and the spiral impeller. 4. The high-efficiency energy-saving aerator according to claim 1, characterized in that: a water inlet deflector is arranged on the outside of the Venturi tube and above the water inlet. 5. The high-efficiency energy-saving aerator according to claim 4, characterized in that: the lower bottom surface of the water inlet deflector forms an acute angle with the outer surface of the Venturi tube to form a diversion angle. 6. The high-efficiency energy-saving aerator according to claim 1, characterized in that: the air inlet is in the tangential direction of the shearing impeller. 7. The high-efficiency energy-saving aerator according to claim 1, characterized in that: said air inlet is externally connected to an air inlet pipe to introduce outside air. 8. The high-efficiency energy-saving aerator according to claim 1, characterized in that: a water outlet deflector is arranged below the spiral impeller.

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