CN203212387U - Efficient jet type aerator - Google Patents

Abstract

The utility model is an improvement to a jet aerator used for oxygenation in water treatment. In order to overcome the technical problems existing in the connection between the air inlet pipe and the water inlet pipe of the current jet aerator, the utility model provides a high-efficiency jet aerator, which includes a gas storage chamber, a power nozzle, an outer jet nozzle, a power nozzle and an outer jet nozzle. The jet nozzles are concentrically fitted to form a gas-liquid mixing chamber between the power nozzle and the outer jet nozzle, and an air suction hole is opened on the nozzle wall of the outer jet nozzle. The intake pipe holding card fixed to the trachea and the water inlet pipe holding card fixed to the water inlet pipe are composed of upper and lower clamping parts respectively. The novel jet aerator has reasonable structure and significantly improved performance, and can be widely used in various water body aeration operations.

Description

Efficient jet diffuser

technical field

The utility model is an improvement to an aerator used for oxygenation in water treatment, in particular to a high-efficiency jet aerator that is independent in structure, can be flexibly installed with an air supply pipe and a water supply pipe, and can significantly improve the performance of the aerator.

Background technique

There are mainly two types of aerators in the prior art, one is a circular disc jet aerator with multiple mixing nozzles around it, such as Chinese patents CN2700318, CN201447385U, CN201634512U, CN201908001U, etc.; a single mixing nozzle Jet aerators, such as Chinese patents CN2825632, CN101993145A, CN202121525U, etc. The above two types of jet aerators are basically connected with flanges when they are connected to the intake pipe and water inlet pipe. If a jet aerator is connected to an intake pipe and a water inlet pipe The operation is also relatively convenient, and the connection can be realized by installing a flange at one end of the air inlet pipe and the water inlet pipe. However, in practical applications, multiple jet aerators are installed on one air intake pipe and one water inlet pipe. If flange connection is used, multiple branch pipes need to be separated on the air intake pipe and water inlet pipe. The flange at the top is connected to the jet aerator, which undoubtedly increases the construction cost and also increases the technical requirements for installation and operation.

In addition, the key to evaluating the performance of the jet aerator is the oxygen transfer efficiency and the service life of the nozzle. The oxygen transfer efficiency depends on the shear efficiency of the high-speed power flow to the air, and the service life of the nozzle is directly related to the nozzle material and the concentration of sludge particles in the power flow. How to improve the oxygen transfer efficiency and prolong the service life of the nozzle is the key to improve the performance of the jet diffuser.

Contents of the invention

In order to overcome the technical problems existing in the connection of the air inlet pipe and the water inlet pipe of the current jet aerator, and to improve the performance of the jet aerator, the utility model provides a high-efficiency jet aerator.

The technical solution adopted in the utility model is: a high-efficiency jet aerator, including a gas storage chamber, a power nozzle, and an outer jet nozzle. The power nozzle is located inside the outer jet nozzle. The tail inner wall of the nozzle is sealed and fixed, a gas-liquid mixing chamber is formed between the power nozzle and the outer jet nozzle, and an air suction hole is opened on the nozzle wall of the outer jet nozzle. The fixed air intake pipe holding card and the water inlet pipe holding card fixed with the water inlet pipe, the air intake pipe holding card and the water inlet pipe holding card are respectively composed of upper and lower clamping parts, and the upper and lower clamping parts are combined to form a cylindrical tubular shape;

The convex surface of the lower clamping part of the air intake pipe clamp is sealed and fixed with the top opening of the air storage chamber, and an air intake hole is provided on the lower clamp part of the intake pipe clamp to communicate with the air storage chamber;

The tail of the power nozzle and the outer jet nozzle is sealed and connected with the convex surface of the clamping part of the water inlet pipe, and a water inlet hole is provided on the connection surface to communicate with the inner cavity of the power nozzle;

The convex surface of the clamping part of the water inlet pipe and part of the nozzle wall of the outer jet nozzle are sealed and fixed with the bottom opening of the air storage chamber, and the air suction hole on the wall of the outer jet nozzle is located under the air storage The air chamber communicates with the aforementioned gas-liquid mixing chamber.

The length of the air suction hole on the wall of the outer jet nozzle from the tail of the outer jet nozzle is slightly shorter than the length of the power nozzle opening from the tail of the power nozzle.

The power nozzle and the outer jet nozzle are respectively composed of a nozzle body and a nozzle opening, and the inner cavity of the nozzle opening is a cylindrical cavity.

In the power nozzle and the external jet nozzle, the diameter of the inner cavity of the nozzle gradually shrinks from the nozzle tail to the nozzle mouth.

The power nozzle and the outer jet nozzle are provided with rifling lines at the inner cavity wall of the power nozzle opening or in the inner cavity wall of the power nozzle opening and the inner cavity wall of the outer jet nozzle opening.

The number of rifling lines is 4, 6 or 8.

The number of said rifling lines is 6.

The depth of the rifling line groove is 1/25-1/10 of the inner cavity diameter of the nozzle mouth.

The depth of the rifling line groove is 3/50 of the inner cavity diameter of the nozzle mouth.

The air storage chamber, the outer jet nozzle, the air inlet pipe holder and the water inlet pipe holder are made of reinforced glass fiber reinforced plastic, and the outer surface is provided with a polyurea layer.

The high-efficiency jet aerator provided by the utility model adopts new environmental protection materials to achieve super corrosion resistance and wear resistance, which not only reduces the weight of the aerator itself, but also improves the service life; the aerator increases The clamping structure is easy to operate and has good sealing performance when connecting with the water inlet pipe and the air inlet pipe, which greatly reduces the construction cost; by reasonably setting the double line on the inner wall of the nozzle mouth, it not only solves the problem of easy blockage of the nozzle mouth and serious wear of the nozzle mouth Technical problems, but also enhance the shear efficiency of the air, improve the oxygen transfer rate, increase the penetration of water flow, and achieve the purpose of efficient aeration of wastewater. The high-efficiency jet aerator has reasonable structure and significantly improved performance, and can be widely used in various water body aeration operations.

Description of drawings

The accompanying drawing is a structural cross-sectional view of the high-efficiency jet aerator provided by the utility model.

In the figure, 1. Air storage chamber, 2. Power nozzle, 3. Outer jet nozzle, 4. Gas-liquid mixing chamber, 5. Air suction hole, 6. Water inlet hole, 7. The lower clamping part of the intake pipe, 8 1. The upper part of the intake pipe holding the card, 9. The upper part of the water inlet pipe holding the card, 10. The lower part of the water inlet holding the card, 11. The air inlet, 12. The rifling line.

Detailed ways

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

As shown in the figure, the high-efficiency jet aerator includes a gas storage chamber 1, a power nozzle 2, and an outer jet nozzle 3. The power nozzle 2 is located inside the outer jet nozzle 3, and the two are concentrically fitted. Sealed and fixed with the tail inner wall of the outer jet nozzle 3, a gas-liquid mixing chamber 4 is formed between the power nozzle and the outer jet nozzle, and an air suction hole 5 is opened on the nozzle wall of the outer jet nozzle 3.

As shown in the accompanying drawings, the aerator also includes an intake pipe clamp for fixing with the intake pipe and an intake pipe clamp for fixing with the water inlet pipe. The holding card lower card part 7 is composed of the water inlet pipe holding card upper card part 9 and the water inlet pipe holding card lower card part 10. When the upper and lower card parts of the two holding cards are combined to form a cylindrical tubular shape respectively to realize the inlet and outlet The clamping and fixing of the air pipe and the water inlet pipe.

As shown in the drawings, the convex surface of the lower clamping part 7 of the intake pipe is sealed and fixed with the top opening of the air storage chamber 1, and an air inlet 11 is provided on the lower clamping part 7 of the intake pipe to communicate with the air storage chamber 1.

As shown in the accompanying drawings, the tails of the power nozzle 2 and the outer jet nozzle 3 are sealed and connected with the convex surface of the upper clamping part 9 of the water inlet pipe, and a water inlet hole 6 is provided on the connection surface to communicate with the inner cavity of the power nozzle.

As shown in the drawings, the convex surface of the upper clamping part 9 of the water inlet pipe and part of the nozzle wall of the outer jet nozzle 3 are sealed and fixed with the bottom opening of the air storage chamber 1, and the air suction hole 5 located on the wall of the outer jet nozzle is located in the air storage The chamber below connects the gas storage chamber with the aforementioned gas-liquid mixing chamber 4 .

During installation, the air inlet pipe and the water inlet pipe are arranged up and down, and a through hole is punched at the position where the jet aerator is installed on the air inlet pipe. The air intake pipe of the device is clamped to connect and fix the jet diffuser with the air intake pipe. Drill a through hole at the position where the jet aerator is installed in the water inlet pipe. The through hole corresponds to the water inlet hole 6 on the clamping part 9 of the water inlet pipe. Use the water inlet pipe clamp of the jet aerator to aerate the jet The device is connected and fixed with the water inlet pipe.

In order to strengthen the sealing of the jet diffuser and the intake pipe and water inlet pipe, a sealing ring is set on the joint surface of the intake pipe holding card and the intake pipe, and the water inlet pipe holding card and the water inlet pipe to strengthen the sealing. As a more convenient way for actual installation, apply a layer of glass glue on the inner surfaces of the lower clamping part 7 of the intake pipe clamp and the upper clamping part 9 of the water inlet pipe respectively, and bond the clamp with the pipeline, and then Hold the card and lock it firmly. In this way, multiple jet aerators can be quickly and sequentially installed on the pipeline.

When working, the high-pressure power fluid flows into the power nozzle through the water inlet hole 6, and the power nozzle is sprayed out into the gas-liquid mixing chamber 4. At this time, the gas in the gas storage chamber 1 also enters the air through the air suction hole 5. In the liquid mixing chamber 4, the high-speed power flow shears the air to form a gas-liquid mixed power flow containing a large number of fine water bubbles, which is sprayed out through the outer jet nozzle 3.

It can be seen from the above description that when the high-speed power fluid flow is ejected from the power nozzle, a negative pressure area will be generated near the power nozzle, and the air in the air storage chamber can be quickly sucked into the gas-liquid mixing chamber by using this negative pressure area . Therefore, as shown in the accompanying drawings, when the air suction hole 5 on the outer jet nozzle wall is set, the length of the air suction hole 5 from the outer jet nozzle 3 tail is slightly less than the length of the power nozzle nozzle opening from the power nozzle 2 tail. After adopting this setting, while the power nozzle sprays out the high-speed power flow, the air in the gas storage chamber can be quickly sucked into the gas-liquid mixing chamber, so that the high-speed power flow can fully contact with the air.

From the above description, it can be seen that the performance of the jet aerator is related to the shear efficiency of the high-speed liquid flow in the gas-liquid mixing chamber to the air. To solve this problem, the jet aerator provided by the utility model adopts the following means to Improves air shear efficiency.

As shown in the accompanying drawings, the power nozzle and the outer jet nozzle in the jet aerator provided by the utility model are composed of two parts: the nozzle body and the nozzle mouth respectively. The inner cavity of the nozzle opening is set as a cylindrical cavity. On the premise that the inner cavity of the nozzle opening is set as a cylindrical cavity, rifling lines 12 are arranged on the wall of the inner cavity of the nozzle opening.

After the rifling line is set on the wall of the inner cavity of the nozzle mouth, the high-speed liquid flow can be changed from a simple high-speed straight line to a high-speed rotation. The rotation of the liquid flow in the process of advancing can cause turmoil in the air in the gas-liquid mixing chamber. The shearing efficiency of the air is greatly improved, so that the high-speed liquid flow is mixed with more gas in the gas-liquid mixing chamber to form a dynamic liquid flow containing a large number of tiny water bubbles.

At the same time, since the dynamic fluid flow contains a large number of tiny sludge particles, setting the rifling line in the inner cavity of the nozzle opening can greatly improve the wear resistance of the nozzle, and also solve the problem that the nozzle is easy to be blocked.

The setting of the rifling line can be set simply in the inner cavity of the nozzle opening of the power nozzle, or it can be set in the inner cavity of the nozzle opening of the outer jet nozzle at the same time. The enhanced penetration makes the water flow in the aeration tank produce a violent turbulent jet flow, and a large amount of oxygen dissolves in the water with the microbubbles, thereby improving the efficient transfer of oxygen.

The setting of the rifling line is like the rifling line set in the gun bore, but its number and depth are different from the rifling line, because what is shot out in this device is a high-speed liquid flow, which is different from the bullets shot out in the gun bore. The effect of the aerator after the experiment is as follows:

Experimental parameters: the number of rifling lines is 4, 5, 6, and 8 respectively, the diameter of the inner cavity of the nozzle opening is 25mm, and the depth of the rifling lines is 1mm, 1.5mm, 2mm, and 2.5mm, respectively.

The result is as follows:

It can be seen from the above table that the oxygen transfer rate increases with the initial increase of the number of rifling lines, but as the number of rifling lines continues to increase, the oxygen transfer rate decreases instead. The change of oxygen transfer rate with rifling depth also exhibits the above rule, that is, it increases with the initial increase of depth, but decreases the oxygen transfer rate with the increase of later depth.

In this embodiment, we can see that when the diameter of the inner cavity of the nozzle opening is 25 mm, the number of rifling lines is set at 6 and the depth is set at 1.5 mm, that is, when the depth is 3/50 of the inner cavity diameter of the nozzle opening, The highest oxygen transfer rate can reach 38%.

The setting of the rifling line also has a certain relationship with the length of the nozzle opening. Since the length of the nozzle opening is relatively short in the jet aerator, the factor of the length of the nozzle opening does not participate in the evaluation.

The results of each of the above experiments are evaluated on the basis that the motive fluid flow enters the motive nozzle at the same velocity.

Since the working environment of the jet aerator is dominated by the water environment, especially when the wastewater tank is being treated, the aerator is easily corroded. Nozzles, intake pipe holders and water inlet pipe holders are made of reinforced fiberglass, and the outer surface is provided with a polyurea layer. After using the above materials, the weight of the aerator is greatly reduced, and the corrosion resistance and wear resistance are significantly improved, which can effectively prolong the service life of the aerator.

Claims (10)

1. efficient spray type aerating device, comprise air storage chamber, power jet, outer ejector nozzle, power jet is positioned at outer ejector nozzle inside, both concentric fits, the afterbody outer wall of power jet is fixed with the afterbody inner wall sealing of outer ejector nozzle, power jet and outside form the gas-liquid mixed chamber between the ejector nozzle, have air suction inlet on the nozzle wall of ejector nozzle outside, it is characterized in that: this spray type aerating device also comprises for embracing card and embrace card with the water inlet pipe that water inlet pipe is fixed with the fixing inlet pipe of inlet pipe, inlet pipe is embraced card and water inlet pipe and is embraced card and be made up of last lower fastening portion respectively, and the involutory back of last lower fastening portion forms cylindrical tube;

Described inlet pipe is embraced lower fastening portion convex surface and the air storage chamber open top sealing and fixing of card, embraces the card lower fastening portion in inlet pipe and is provided with air inlet port and air storage chamber perforation;

The afterbody of described power jet and outer ejector nozzle and water inlet pipe are embraced card upper fastening portion convex surface and are tightly connected, and are provided with prosopyle and the perforation of power jet inner chamber at this joint face;

Described water inlet pipe is embraced the uncovered sealing and fixing of portion nozzle wall and air storage chamber bottom of card upper fastening portion part convex surface and outer ejector nozzle, and the described air suction inlet that is positioned on the outer ejector nozzle wall is positioned at the air storage chamber below air storage chamber and aforesaid gas-liquid mixed chamber are connected.

2. efficient spray type aerating device according to claim 1 is characterized in that: the air suction inlet on the described outer ejector nozzle wall, length of the outer ejector nozzle afterbody of its distance is slightly less than the power jet mouth apart from the length of power jet afterbody.

3. efficient spray type aerating device according to claim 1 is characterized in that: described power jet and outer ejector nozzle are made up of nozzle body and jet hole two portions respectively, and the jet hole inner chamber is cylindrical cavity.

4. efficient spray type aerating device according to claim 3 is characterized in that: described power jet and outer ejector nozzle, its nozzle body intracavity diameter is shunk to the jet hole direction gradually by the nozzle afterbody.

5. efficient spray type aerating device according to claim 3 is characterized in that: described power jet and outer ejector nozzle, power jet mouth inner chamber chamber wall or power jet mouth inner chamber chamber wall and outside be provided with rifling simultaneously in the wall of ejector nozzle mouth inner chamber chamber.

6. efficient spray type aerating device according to claim 5, it is characterized in that: described rifling quantity is 4,6 or 8.

7. efficient spray type aerating device according to claim 5, it is characterized in that: described rifling quantity is 6.

8. efficient spray type aerating device according to claim 5 is characterized in that: the described rifling wire casing degree of depth is the 1/25-1/10 in footpath, jet hole inner chamber chamber.

9. efficient spray type aerating device according to claim 5 is characterized in that: the described rifling wire casing degree of depth is 3/50 of footpath, jet hole inner chamber chamber.

10. efficient spray type aerating device according to claim 1 is characterized in that: described air storage chamber, outer ejector nozzle, inlet pipe are embraced card and water inlet pipe and are embraced card and adopt the reinforcing glass steel fiber to make, and its outside surface is provided with polyurea layer.

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