CN202576079U - Jet aerator for oxygenation in water - Google Patents

Abstract

The utility model is an improvement of the jet aerator for oxygenation in water, which is characterized in that there are multiple jet mixing nozzles arranged alternately on the axial peripheral surface of the water supply pipe, wherein the inner nozzle is connected with the water supply pipe, and there is an air supply pipe parallel to the water supply pipe There is a hollow air cavity between the air supply pipe and the water supply pipe to connect and fix the two pipes. One end of the hollow air cavity is connected to the air outlet on the peripheral surface of the air supply pipe, and the other end of the extended cover is connected to the air inlet on the peripheral surface of the inner and outer nozzles of the jet mixing nozzle on the water supply pipe. The arrangement of the nozzles is flexible, the structure is simpler than the existing ones, and it is easy to manufacture. The jet aeration nozzles are installed on the pipeline, and the shape and size of the aerator can be designed according to the specific pool shape, which has higher adaptability to the pool type; The installation of the type structure is simple and easy, and the installation height can be selected and set arbitrarily within the depth range of the pool. The water and air space capacity is large, and the aeration intensity can be adjusted in a large space. The nozzle is inclined downward, which improves the agitation effect on the sedimented sludge at the bottom of the pool, and is beneficial to prolong the residence time of the air bubbles in the water and improve the oxygen transfer efficiency.

Description

Jet aerator for oxygenation in water

technical field

The utility model is an improvement of a jet aerator for oxygenation in water treatment, in particular relates to a jet aerator for oxygenation in water which is simple in structure, can be made into any shape, and is suitable for arrangement of various water treatment pools.

Background technique

Jet aerator, using jet diffusion oxygenation, completes the transfer of oxygen phase to liquid phase, and can realize the process of oxygenation, aeration and stirring in the sewage treatment system at the same time. It has strong agitation and mixing ability, high oxygen transfer efficiency, and general oxygen transfer efficiency In 20-25%, it can be applied to larger pool depth, easy maintenance and operation, no need to clean the pool for maintenance and replacement, especially in the activated sludge wastewater treatment system, because the mixture of wastewater and activated sludge is usually used as the jet work Medium, when the air is inhaled, violent mixing will occur in the ejector. On the one hand, the mixing will carry out the turbulent diffusion and energy exchange between gas-liquid-solid (activated sludge), and the transfer process of gas-liquid-solid three-phase, What's more prominent is the biological effect between the very fine air bubbles "cut" by high-speed violent turbulence, the tiny particles of activated sludge, and the organic matter in wastewater (liquid phase), which greatly increases the amount of activated sewage. Mud surface renewal rate and adsorption surface area, so that the fine flocs of activated sludge can fully contact and adsorb with the oxygen in the air bubbles and the organic matter in the wastewater, so that the adsorption capacity is greatly improved, and the sedimentation performance of activated sludge is good. Therefore, it has been paid attention to in water treatment engineering.

There are two main types of jet aerators in the prior art, one is a circular disc jet aerator with multiple mixing nozzles on the surrounding surface, such as Chinese patents CN2700318, CN201447385U, CN201634512U, CN201908001U, etc.; Nozzle jet aerators, such as Chinese patents CN2825632, CN101993145A, CN202124525U, etc. Although they all have the advantages of the aforementioned jet aerators, there are still some shortcomings. One is that the structure is relatively complicated, which not only increases the manufacturing cost, but also is difficult to manufacture for some materials that are excellent in water treatment but are not suitable for mechanical molding such as FRP; The second is that there are certain limitations in the layout of the water treatment pool (poor adaptability to the shape of the water treatment pool). The aerobic pools are all rectangular pools, and the aeration nozzles set by circular rays are difficult to arrange evenly in the rectangular pools, especially for some small and special-shaped pools; third, the water and air spaces are relatively small, and can be adjusted in real time according to water treatment requirements Difficulty (poor adjustability); Fourth, the arrangement method in the water treatment pool is single, and the setting flexibility is poor. Usually, it can only be set at the bottom of the pool, and the service water depth is fixed. The aforementioned deficiencies still have room for improvement.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art, and provide a jet aerator for oxygenation in water, which has a simple structure, can be made into any shape, and is suitable for the arrangement of various water treatment pools.

To achieve the purpose of the utility model, the main improvement is to adopt parallel interphase air pipes and water pipes, a plurality of jet mixing nozzles are arranged between the water pipes in the axial direction, and there is an air-inducing cavity between the air pipes and the jet mixing nozzles, thereby overcoming the above-mentioned deficiencies in the prior art. Realize the purpose of utility model. Specifically, the utility model jet aerator for oxygenation in water includes a jet mixing nozzle composed of inner and outer nozzles concentrically nested. The water supply pipe is connected, and there is an air supply pipe parallel to the water supply pipe. There is a hollow air cavity connecting and fixing the two pipes between the air supply pipe and the water supply pipe. Air inlets on the peripheral surface of the inner and outer nozzles of the jet mixing nozzle.

Before the detailed description, the basic functions and effects that can be achieved by the invention are firstly introduced, so that those skilled in the art can have a clear understanding of the technical scheme of the general conception of this patent and the basic effects achieved.

The working principle of this jet aerator: the water (mixed muddy water) in the treatment tank (usually an aerobic tank) is continuously pumped into the water supply pipe by a pump (such as a submersible pump), and the outlet of each jet inner nozzle connected to the water supply pipe is connected to the pole. High speed (for example, outlet flow rate 12m/s), the jet enters the water-air mixing chamber formed by the inner and outer nozzles, and at the same time forms a negative pressure zone at the outlet of the inner nozzle, so that the air inlet on the peripheral surface of the outer nozzle of the jet flows from the middle air connected to the air supply pipe. The cavity sucks in a large amount of air. The action of the water jet causes the inhaled air to be sheared, crushed, and emulsified multiple times in the air-water mixing chamber of the jet mixing nozzle. Due to the pressure gradient and concentration gradient between the gas-liquid double film, the number of bubbles increases sharply, forming countless tiny microbubbles, which form a powerful jet mixed liquid with the mixed mud and water, which is ejected from the outer jet nozzle into the pool for aeration. At the same time, the kinetic energy of the powerful jet mixture stirs the water around the nozzle, forming a strong mixing and stirring effect in the pool. And because the jet aeration adopts the main structure of parallel water supply pipes and air supply pipes, and the jet mixing nozzles are arranged on the water supply pipes alternately, so not only the structure is simpler, but also the jet aerator of any shape can be made by bending the pipes. The shape variability of the jet aerator is increased, so as to adapt to the arrangement of water treatment tanks in various plane shapes, and a uniform aeration effect on the plane can be obtained, thereby greatly improving the adaptability of the jet aerator to the water treatment tank.

In the utility model.

The jet mixing nozzle is the same as the jet mixing nozzle of the jet aerator in the prior art. It is composed of inner and outer nozzles concentrically nested. The pressure water flow passes through the inner jet nozzle to generate a negative pressure area to inhale air, and an air-water mixing chamber is formed between the inner and outer nozzles. In the process, the introduced gas is fully chopped and mixed with water, and then sprayed out from the jet nozzle to aerate the water.

The air supply pipe and the water supply pipe respectively provide jet water and aeration gas source for each jet mixing nozzle, and the water supply pipe also serves as the basis for setting the jet mixing nozzle. One of them is preferably a small-diameter pipe for the air supply pipe and a large-diameter pipe for the water supply pipe, for example, the ratio of the two is 1:2. The water supply pipe and the air supply pipe are parallel to each other, and the middle is connected by a hollow air cavity. First, it is beneficial to the parallel fixing of the two pipes. Second, it is beneficial to the uniform gas distribution of the jet mixing nozzles. The middle air cavity is conducive to the formation of a buffer space for the gas supply. The trachea connection is more conducive to uniform air induction, which can ensure the uniformity of air induction and facilitate the adjustment of aeration. It overcomes the difficulty in adjusting the aeration intensity in the prior art that the air intake is directly connected with the jet mixing nozzle.

The main function of the hollow air cavity connecting the two pipes is to connect the gas supply pipe and the water supply pipe which are fixed and parallel to each other to make them into a whole; According to this function, the hollow air cavity can be a hollow strip structure (such as a long rectangle or a long triangle) that is approximately equal to the axial length of the air pipe and the water pipe, or it can be provided with two connecting pipes only at the position of the jet mixing nozzle. Alternate hollow air cavities (for example, the cross-section is approximately triangular). From the perspective of saving materials, the latter is especially superior.

In addition, one is preferably to make the jet mixing nozzle installed on the water supply pipe inclined downward, for example, the angle between the central axis of the nozzle and the horizontal diameter of the water supply pipe is 5-30 degrees, which is more preferably 8-12 degrees, so that the sprayed jet The mixture comes out slightly downwards. The downward nozzle structure is not only conducive to flushing the sedimented sludge at the bottom of the pool, but also can prevent the sludge at the bottom of the pool under the aeration device from sedimentation and hardening due to lack of agitation (the aeration device is installed off the ground); at the same time, it is slightly The jet liquid ejected from the bottom can form a longer horizontal jet area, and the traveling path of the bubbles is in a horizontal "L" shape, and then turns to rise slowly, so that the rising speed of the microbubbles slows down, and the long gas overflow distance increases the gas-liquid flow. The contact time can promote the full mixing and contact of wastewater and oxygen, thereby improving the transfer efficiency of oxygen to water, and the transfer efficiency of oxygen can reach 35%.

The utility model jet aerator for oxygenation in water, compared with the prior art, adopts the main pipe type (trachea water pipe) structure, and the jet mixing nozzles are arranged on one side or both sides or around the long water pipe alternately, not only the nozzle arrangement High flexibility, and simpler structure than the existing jet aerator, easy to manufacture, for example, it can be made of FRP with good wear resistance and corrosion resistance, which makes the jet aerator have a longer service life, up to 25 years, and is semi-permanent ; and because the jet aeration nozzle is set on the pipeline, the shape and size of the aerator can be designed according to the specific pool shape, and made into various geometric shapes, such as straight line, bent structure, arc, various rings, etc., the aeration The structure and shape of the aerator vary greatly, and it is suitable for uniform aeration in various water treatment aerobic pools (that is, according to the type of water treatment pool, the pipeline structure can be changed to meet the layout and uniform aeration), and it has higher adaptability to the pool type , so as to solve the technical problem of poor adaptability of the existing jet aerator to the shape of the water treatment pool, especially for sewage treatment expansion projects with small footprint and irregular physical size of the plant (it is difficult for the existing jet aerator to do so) ). Tubular structure, simple and easy to install, and can be set arbitrarily within the depth range of the pool, for example, it can be set in the air, and the installation height can be freely selected. For deep pools, it can be set in double layers, breaking through the jet aerator can only be installed at the bottom of the pool The single use method is conducive to the construction of deep pools for water treatment pools. The downward slanting setting of the nozzle not only improves the agitation of the sludge at the bottom of the pool, prevents the sludge from being deposited at the bottom of the pool, and finally submerges the aeration device, and reduces the pool capacity, but also helps to prolong the residence time of the air bubbles in the water, thereby The oxygen transfer efficiency is improved, and the oxygen transfer efficiency can reach 35%. Furthermore, air supply and water supply adopt a long tube structure, the water and air space capacity is large, the adjustable space is large, the aeration intensity is adjustable and the aeration stability is good, such as micro-aeration, which can meet the maximum requirements of water treatment for aeration. Oxygen requirements. In addition, after the pressure gas supply is cut off, the working fluid is ejected through the nozzle at a high speed, and it can also be used as an anaerobic mixing and stirring device alone, and the additional stirring device can be omitted.

Below in conjunction with several optimized specific embodiments, illustrate and help to further understand the essence of the utility model, but the specific details of the embodiment are only for explaining the utility model, and do not represent all technical solutions under the concept of the utility model, so it should not be interpreted as a reference to the utility model. The general technical solution of the new model is limited. Some insubstantial additions and/or changes that do not deviate from the concept of the utility model in the eyes of technicians, such as simple changes or replacements with technical features that have the same or similar technical effects, all belong to the protection of utility models scope.

Description of drawings

Fig. 1 is a structural schematic diagram of the utility model jet aerator for oxygenation in water.

Fig. 2 is a schematic diagram of the cross-sectional structure of Fig. 1A-A.

FIG. 3 is a schematic diagram of the three-dimensional structure in FIG. 1 .

Figure 4 is a schematic diagram of jet aeration effect.

Fig. 5 is a schematic diagram of arrangement in a water treatment rectangular pool.

Fig. 6 is a schematic diagram of arrangement in a water treatment circular pool.

Fig. 7 is a schematic diagram of arrangement in an irregular water treatment pond.

Detailed ways

Embodiment 1: referring to Fig. 1-5, utility model water oxygenation is used jet aerator, the small diameter (for example 105-115mm) air supply pipe 1 that is provided with by parallel up and down (center distance 300-320mm), and large diameter ( Such as 210-225mm) water supply pipe 2 (the length depends on the length of the treatment pool), the two pipes are closed at one end and open at the other end, and are respectively connected with the air source (oxygen supply fan) and the pressure water source (submersible pump) (the length is large and can be omitted Closed, both ends are connected to the air source and water pump at the same time). The water supply pipes are 900-1500mm apart, and the sides are opposite and staggered (the two sides of the phases are facing each other). There are jet outer nozzles 5, and the total length of the outer nozzles is 220-240mm. It is composed of a straight section with a diameter of 105-115mm and a conical section. 115-125mm, there is an air inlet 5.1 with a diameter of 38-42mm on the straight section, and an outlet 5.2 on the conical section. The outer jet nozzle is slightly inclined downward on the side of the water supply pipe, and the angle between the central axis of the nozzle and the horizontal diameter of the water supply pipe is 8-12 degrees. The outer jet nozzle has a connected water supply pipe, a smaller diameter and shorter inner conical nozzle 4, the front water nozzle 4.1 has a diameter of 25-30mm, and the length of the inner conical nozzle is 75-85mm (about 1/3 of the length of the outer nozzle) , shorter than the straight section of the outer nozzle of the jet, but longer than the position of the air inlet on the straight section, the interface between the inner nozzle and the water supply pipe 2.1 diameter 55-65mm (about 1/2 of the diameter of the outer nozzle). A tapered air-water mixing chamber 6 (conical from large to small) is formed between the inner and outer nozzles to form a jet mixing nozzle. Between the air supply pipe 1 and the water supply pipe 2, there is a hollow air cavity 3 connecting the two pipes alternately at the position of the jet mixing nozzle of the water supply pipe. The cross section of the hollow air cavity is triangular. , Connect to the air inlet 5.1 on the peripheral surface of the outer nozzle on the water supply pipe, so that the air in the air supply pipe 1 can enter the jet outer nozzle 5. The entire jet aerator is made of glass reinforced plastic (FRP) for a rectangular water treatment aerobic tank (Fig. 5).

Jet aeration working process: the pump sends the pressure of the mixed muddy water in the aerobic tank into the water supply pipe 1, and it is sprayed out through the conical inner nozzles 4 connected to it, and at the same time, a negative pressure area is formed at the outlet of the nozzle 4.1. The gas in the trachea 1 passes through the hollow air cavity 3 and is inhaled by the upper air inlet 5.1 of the jet outer nozzle 5, and is repeatedly sheared, pulverized, and emulsified in the air-water mixing chamber 6, and the high pressure, strong shearing and stirring make the bubble diameter greatly increase Reduced, forming countless tiny microbubbles, mixed with muddy water to form a powerful jet mixture, which is ejected from the outer jet nozzle nozzle 5.2 into the pool to play aeration (the stroke of the bubbles in water is shown in Figure 4).

Embodiment 2: Referring to FIG. 6, as in Embodiment 1, the air supply pipe and the water supply pipe are bent like a U shape, and the opening is opened, which is used in a circular water treatment aerobic pool.

Embodiment 3: Referring to Fig. 7, as in Embodiment 1, according to the shape plane of the water treatment tank, the air supply pipe and the water supply pipe are bent into a jet aeration device suitable for placement and uniform plane aeration.

In addition, according to the type of treatment pool, it can also be made into jet aerators of various shapes.

For those skilled in the art, under the inspiration of the patent concept and specific embodiments, some deformations that can be directly derived or associated from the patent disclosure and common sense, those of ordinary skill in the art will realize that other methods can also be used, Or the replacement of common known technologies in the prior art, as well as equivalent changes or modifications of features, and different combinations of features, such as according to the requirements of the aeration rate, the change of each size, the change of the preparation material, the left and right of the trachea and water pipes Settings, jet mixing nozzles are set on one side or both sides or on the surrounding surface of the water supply pipe, and other insubstantial changes can also be applied, and can achieve the functions and effects described in this patent, so we will not give examples one by one to elaborate , all belong to the protection scope of this patent.

The dimensions and ratios mentioned in this patent are only experimental optimization values, which represent a relative concept and cannot be understood as mathematically precise values, which can be understood by technical personnel.

Claims (10)

1. A jet aerator for oxygenation in water, including a jet mixing nozzle composed of inner and outer nozzles concentrically nested. It is characterized in that there are multiple jet mixing nozzles, which are arranged alternately on the axial peripheral surface of the water supply pipe, and the inner nozzle communicates with the water supply pipe. There is an air supply pipe parallel to the water supply pipe. There is a hollow air cavity between the air supply pipe and the water supply pipe to connect and fix the two pipes. One end of the hollow air cavity is connected to the air outlet on the peripheral surface of the air supply pipe, and the other end is connected to the jet mixing nozzle on the water supply pipe. Air inlets on the periphery of the middle and outer nozzles. 2. The jet aerator for oxygenation in water according to claim 1, characterized in that the air supply pipe and the water supply pipe are parallel to each other, and the diameter of the air supply pipe is smaller than that of the water supply pipe. 3. The jet aerator for oxygenation in water according to claim 2, characterized in that the air supply pipe and the water supply pipe are arranged alternately up and down. 4. The jet aerator for oxygenation in water according to claim 2, characterized in that the hollow air cavities connecting the air supply pipe and the water supply pipe are alternately arranged at the positions of the jet mixing nozzles of the water supply pipe. 5. The jet aerator for oxygenation in water according to claim 4, characterized in that the cross-section of the hollow air cavity between the two connected pipes is triangular in shape. 6. The jet aerator for oxygenation in water according to claim 1, characterized in that the jet mixing nozzle on the water supply pipe is slightly inclined downward, and the angle between the central axis and the horizontal diameter of the water supply pipe is 5-30 degrees. 7. The jet aerator for oxygenation in water according to claim 6, characterized in that the angle between the central axis of the jet mixing nozzle on the water supply pipe and the horizontal diameter of the water supply pipe is 8-12 degrees. 8. The jet aerator for oxygenation in water according to claim 1, characterized in that the jet mixing nozzles are arranged alternately on one side or both sides or on the peripheral surface of the water supply pipe. 9. The jet aerator for oxygenation in water according to claim 1, characterized in that the air inlet on the body of the outer nozzle tube is located within the length of the inner nozzle. 10. The jet aerator for oxygenation in water according to any one of claims 1 to 9, characterized in that the diameter of the air supply pipe is 105-115 mm, the diameter of the water supply pipe is 210-225 mm, and the diameter of the inner nozzle and the water supply pipe is 55-55 mm. 65mm, the diameter of the interface between the outer nozzle and the water supply pipe is 105-115mm, the length of the inner and outer nozzles is 75-85mm and 220-240mm, and the distance between the jet mixing nozzles is 900-1500mm.

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