KR20040013896A - Nozzle for mixing air - Google Patents

Abstract

PURPOSE: Provided is a gas-liquid mixing nozzle for aeration of water, which does not have submerged mechanical driving machines for preventing failure of such machines and sucks air and breaks bubbles into micro-bubbles by using high speed water flow in a nozzle. CONSTITUTION: The nozzle comprises an air sucking nozzle member(1) connected to a pressurized water supply pipe (P1) at an end and through which water flows at high speed, at least one middle nozzle member(2) connected to the other end of the air sucking nozzle member(1) at an end thereof, a sparing nozzle member(3) connected to the other end of the middle nozzle member(2) at an end thereof, an air supply pipe (P2) with an end located on the middle nozzle member(2), a casing(5) for surrounding the end of air supply pipe (P2), the middle nozzle member(2), and connection portions between the middle nozzle member(2) and the air sucking nozzle member(2) and the sparging nozzle member(3), respectively, and air supply nozzles(81,82,83) are formed at every connection points between the air sucking nozzle member(1), the middle nozzle member(2) and the sparging nozzle member(3), wherein an air breaking grooves(22) are formed on the inner wall of the middle nozzle member(2), so air introduced into the middle nozzle member(2) is split into microbubbles in the nozzle member(2) by water flowing at high speed through the air sucking nozzle member(1), mixed with the water while flowing through the nozzle and discharged out through an exit of the sparging nozzle member(3).

Description

Nozzle for mixing air

The present invention relates to a mixed nozzle for improving the dissolved efficiency of the introduced air by miniaturizing the air introduced from the outer peripheral portion of the pressurized water flow using the pressurized water flow energy flowing through the nozzle member at high speed.

Conventionally, in closed water bodies such as farms, reservoirs, garden ponds, lakes, or open waters such as rivers and ports, water is forced to be agitated by installing aberrations or fountains on the surface of the pond to purify the water quality. In order to improve the dissolved oxygen rate by bringing air into contact with air or by installing an acid nozzle in the water tank to blow bubbles into the water forcibly.

Conventional water stirrers and aerators, however, are generally forced to agitate water by rotating a screw installed on the surface of the water or in water, so that the atmosphere is mixed in the water. The efficiency of cleaning sludge, etc. is poor, and the range and ability of the agitator or aeration are limited, and the driving parts of the machine in the water are easily worn or broken, and regular inspection and maintenance are required. There was a problem.

In addition, when crushing air into water to make bubbles, the solubility improves as the bubbles become finer, but there is a problem in that the fineness of the bubbles is limited by the screw rotation method and requires a lot of power.

In the acid technique, the nozzle always in the water has a problem that clogging occurs by repeating the operation and stop of the aeration, and there is a problem that a sufficient aeration effect cannot be obtained.

Therefore, the present invention grasps the problems of the conventional water purification apparatus, completely eliminates the mechanical drive unit in the water, and uses the high speed water flow in the furnace member to inhale air and make the air bubbles finer. It is an object to provide a nozzle.

1 is a cross-sectional view showing one embodiment of the mixing nozzle of the present invention,

2 is a longitudinal side view of FIG. 1;

3 is an enlarged view of a part of the distribution channel formed on the inner circumferential surface of the nozzle member.

<Description of the symbols for the main parts of the drawings>

A-Aeration nozzle, P1-Pressurized water supply pipe,

P2-air supply pipe, 1-suction nozzle member,

11-channel, 2-the first intermediate nozzle member,

21-Aqueduct, 22-Bubble-free fracture groove,

3-second intermediate nozzle member, 31-channel,

4-injection nozzle member, 41-channel,

5-casing, 51-air inlet,

81,82,83-Air inlet nozzle.

In the mixed nozzle according to the present invention, the suction nozzle member, the intermediate nozzle member, and the injection nozzle member, each having a flow path of high speed water therein, are arranged and joined to the same axis in the casing, which forms the air introduction chamber, and the nozzle member thereof. In the mixed-use nozzle in which air can be sucked into the flow passage from the air introduction nozzle formed in the plurality of stages, the grooves for crushing the bubbles are formed along the inner circumferential surface of the flow passage so as to be lost. The air inlet nozzle of the foremost heat | fever is made into the small hole shape, and it formed by drilling in the starting-end part position in the bubble free crushing groove | channel.

In the mixed gas nozzle according to the present invention, the air sucked in and introduced from the air inlet nozzle to the tip of the unfoamed groove in the flow path formed in the nozzle member is formed by pressurized water flowing through the nozzle member at high speed. All the bubbles are formed at each end of the end of the unfoamed fracturing groove, as it is sheared and broken as if it is crushed and flows down. It is again broken by the high-speed water flow, and the shear crushing is repeated, so that the air bubbles can be made finer more effectively and the mixing can be performed more reliably.

Further, the second and subsequent rows of the air introduction nozzles formed in the nozzle member can be formed in a ring slit shape.

In this way, a larger amount of air can be introduced into the air introduced from the ring slit-shaped air introduction nozzles after the second row, and since the aging of the introduced air and the high speed water flow is performed, mixing with the high speed water stream is efficiently performed. Happens.

A preferred embodiment of the mixed nozzle of the present invention will be described with reference to the drawings.

1 to 3 show a first embodiment of the present invention. In the drawings, A represents the entire aeration nozzle of the present invention, wherein the aeration nozzle is in a closed water body such as a pond or a lake, or in an open water body such as a river or a harbor, and a sewage storage tank or livestock manure. In a reservoir or the like, sewage, livestock manure and the like (hereinafter referred to as “sewage”) are provided at a predetermined water level position in the body of water where it is necessary to aerated.

The mixing nozzle is installed in an aeration tank or a treatment tank to refine bubbles and to decompose harmful substances such as dioxins, PCBs, etc. dissolved in water using ultrasonic waves generated during the breakdown of micro bubbles. It is also possible to decompose and harm household food waste mixed with water through the refinement of bubbles.

As shown in Figs. 1 to 3, the aeration nozzle A has a tubular suction in a casing 5 in which a pressurized water supply pipe P1 is connected to an end portion and a supply pipe P2 is connected to an outer circumferential surface, respectively. Nozzle member 1, intermediate nozzle members 2, 3 of one end or three or more stages (in the embodiment shown in the drawing, but may be three or more stages), and injection nozzle member 4 ) Are arranged so as to be arranged in a line so as to be arranged on the same line as each axis, and are integrally combined.

Also, the air inlet nozzles 81, 82, 83 are connected to the connection positions of the suction nozzle member 1, the intermediate nozzle member 2, 3, and the injection nozzle member 4 each having a cylindrical shape. Form. The air inlet nozzle 81 of the foremost row (the 1st stage) is a small hole shape, and it arranges a plurality of airflow nozzles in substantially equal intervals along the circumferential direction, and the air introduction nozzles 82 and 83 after the 2nd stage are ring slit-shaped It is done. The ring slit-shaped air introduction nozzles 82 and 83 are formed by setting a predetermined small interval when the intermediate nozzle members 2 and 3 and the injection nozzle member 4 are connected to each other. As the air introduction nozzles 82 and 83 formed from the interval between the nozzle members, the air introduction nozzles 82 and 83 are set to be the most suitable according to the conditions such as the quantity of water, the flow rate and the dissolved oxygen rate. This can be determined in advance at the time of design, or can be appropriately adjusted by setting the connection between the members to an adjustable structure such as screwing.

Thereby, the flow path 11 of each nozzle member 1, 2, 3, and 4 arranged so that the pressurized water introduced through the pressurized water supply pipe P1 may become coaxial. 21), (31) and (41) generate a negative pressure on the inner circumferential surface of the flow path when flowing in the high speed flow. This negative pressure passes through the small-slot air introduction nozzle 81 formed between the suction nozzle member 1 and the intermediate nozzle member 2, or between the intermediate nozzle members 2 and 3, and the intermediate nozzle member. Abutting the air introduction chamber 51 in the air supply pipe P2 and the casing 5 through the ring slit-shaped air introduction nozzles 82 and 83 respectively formed between (3) and the injection nozzle member 4. Air is sucked into the flow path from the air introduction holes 23 and 33 formed in the direction. When the sucked air flows through the flow path along the inner circumferential surfaces of the intermediate nozzle members 2 and 3, it is broken by the high speed water flow, sheared and refined, and mixed with the over-pressured high speed water stream.

In this case, as shown in Figs. 1 and 2, a plurality of unfoamed grooves 22 are formed on the inner circumferential surface along the flow path 21 so as to end in the middle thereof, and each of the unfoamed grooves ( 22. The air introduction nozzle 81 of the foremost row of small holes is drilled and opened at the starting end position in Fig. 22). As a result, the air introduced into the bubble-free crushing groove 22 from the small-sized air introduction nozzle 81 is determined so that the flow of water flowing down the flow passage 21 at high speed can be efficiently sheared. Vortex generated by the breakage of the water flow allows the bubbles to be sheared finely, arranged in parallel with the axis, or can be formed so that it can be turned gently, this can be set appropriately in accordance with the miniaturization of the bubbles have.

In this way, the high-speed water flow in which the bubbles are well mixed via the flow paths 21 and 31 in the intermediate nozzle member is a trumpet-shaped injection nozzle member 4 disposed on the downstream side of the second intermediate nozzle member 3. It is a stable rectification via the inside, and is sprayed into the sewage, manure or chemical water dissolved in water at high speed.

In this case, the air sucked from the air introduction nozzle 83 formed between the second intermediate nozzle member 3 and the injection nozzle member 4 is less than the suction amount of the preceding air introduction nozzles 81 and 82. In a small amount, the introduced air is crushed into fine bubbles, while a part of the air is present between the inner circumferential surface of the injection nozzle member 4 and the high speed fluid along the inner circumferential surface of the injection nozzle member 4 to act as a lubricant. The flow resistance is discharged at high speed without reducing the flow resistance of the high speed fluid.

Hereinafter, the operation of the embodiment configured as described above will be described.

When pressurized water is supplied from the pressurized water supply pipe P1 connected to the front end of the suction nozzle member 1 to the mixed nozzle A of the present invention, the inside of the flow path 11 of the suction nozzle member 1 flows at high speed. When the discharge path 11 is discharged from the flow passage 11 into the flow passage 21 of the intermediate nozzle member 2, the flow passage 21 at the joining position of the suction nozzle member 1 and the first intermediate nozzle member 2 is formed. The negative pressure is generated by the Venturi effect on the inner peripheral surface of the. In this way, the air guided from the air supply pipe P2 to the air introduction chamber 51 is introduced into the bubble-free crushing groove 22 in the flow passage 21 via the small air introduction nozzle 81. do.

The air introduced into the foamless crushing groove 22 is crushed by the flowing water flowing down the flow path 21 at high speed, and all the bubbles flowing down the foamless crushing groove are released from the foamless crushing groove. When escaping, the angle of the bubble-free fracture groove is made like a blade so that it is more sheared, and the bubbles become more fine, and are also broken and refined by the pressurized high-speed flow flowing down the flow passages 21 and 31. It flows down with high speed water flow.

Similarly, when the pressurized water flows from the flow passage 21 of the first intermediate nozzle member 2 to the flow passage 31 of the second intermediate nozzle member 3, the air introduction chamber 51 and the air introduction nozzle 82 are used. At the same time, it is crushed into a pressurized high-speed water stream flowing down the flow passage 31, is refined and mixed with the high-speed water stream.

Further, the air introduction chamber 51 and the ring slit-shaped air introduction nozzle 83 also flow when flowing from the flow passage 31 of the second intermediate nozzle member 3 to the flow passage 41 of the injection nozzle member 4. Air which has become a swirl flow from the air is introduced into the flow passage 41. The air introduced from the air introduction nozzle 83 is mixed with the high velocity water stream as fine bubbles, and the micro bubbles flow along the inner circumferential surface of the circulation path 41 together with the high velocity water stream to act as a lubricant. The flow rate of the high-speed water flow does not decrease, and the rectified mixed air flow is discharged from the injection nozzle member 4 into the highway sewage, and the high-pressure mixed air flows from the injection nozzle to the distant water from the injection nozzle. Transported and enables aeration in a wide range of water bodies.

In addition, a wide range of aeration is carried out by the water stream containing this microbubble, and since the mixed water stream can reach the nail bottom and the river bottom part reliably by the water flow, dissolved oxygen is also stored in the sediment deposited on the nail bottom part and the river bottom part. Can be supplied and the aerobic treatment (decomposition) of the deposit can be promoted. In addition, by installing this in a livestock manure storage tank or livestock manure storage reservoir that is more viscous than sewage, the high-pressure water having high dissolved oxygen including microbubbles is activated in the livestock manure, so that organic matter in the manure can be more efficiently decomposed. In addition, the aeration of the retention portion of the water flow is possible, and is effective for improving the water quality of large areas, ponds of complex topography, lakes, and the like.

According to the mixed gas nozzle of the present invention, the air sucked in and introduced from the air inlet nozzle into the tip of the groove for unfoamed crushing in the flow path inside the nozzle member is sheared by pressurized water flowing through the nozzle member at high speed. In addition, since the grooves flow down into the unfoamed grooves and the grooves are lost in the middle, all the bubbles continue to be sheared at high speeds at each portion of the end of the unfoamed grooves. The bubble can be refined and the mixing can be performed more reliably.

In addition, a larger amount of air can be introduced by the air introduced from the second and subsequent ring slit-shaped air introduction nozzles, and the mixing of the high speed water stream is performed efficiently because the introduction air and the high speed water stream are matured. .

Claims (2)

The air in which the suction nozzle member, the intermediate nozzle member, and the injection nozzle member, each having a flow path of high-speed water therein, are arrayed on the same axial center inside the casing where the air introduction chamber is formed, and the nozzle member is formed in multiple stages. In a mixed air nozzle which allows air to be sucked from the introduction nozzle into the flow passage, it is possible to dissipate along the inner circumferential surface of the flow passage and in the middle thereof to form a plurality of unfoamed grooves and to introduce the most advanced air. A nozzle for aeration, characterized in that the nozzle is formed in a small hole and perforated at the starting end position in the bubble-free fracture groove. The mixed nozzle according to claim 1, wherein the second row or later of the air introduction nozzles formed in the nozzle member is formed in a ring slit shape.