CN201908001U - Novel jet aerator - Google Patents

Abstract

The utility model relates to the improvement of an oxygenated jet aerator for waste water treatment, in particular to a positive pressure air supply multi-nozzle disc type novel jet aerator. The jet flow aerator of the utility model is composed of an inner nozzle and an outer nozzle. There are several nozzles on each of the inner nozzle and the outer nozzle, which are evenly distributed in a ring shape and symmetrical in the center; the inner nozzle on the inner nozzle is the same as the outer nozzle on the outer nozzle. One-to-one correspondence, the centers of the inner and outer nozzles are on the same straight line; the diameter of the inner nozzle is 25-50mm, and the diameter of the outer nozzle is 40-80mm. The utility model reduces the coalescence probability of microbubbles during aeration and improves the utilization rate of oxygen. The processing capacity and effect of the existing facilities can be greatly improved, and the nozzle of the utility model has a large diameter, and the long-term operation will not be blocked.

Description

New jet aerator

Technical field:

The utility model relates to the improvement of an oxygenated jet aerator for waste water treatment, in particular to a positive pressure air supply multi-nozzle disc type novel jet aerator.

Background technique:

In the field of sewage treatment, the aeration device is the most widely used key equipment of the activated sludge process (the aeration device has four types of aeration, such as blast aeration, mechanical aeration, blast-mechanical aeration and jet aeration. device). In the sewage treatment process, the energy consumption of the aeration system accounts for 40% to 60% of the total energy consumption of the sewage treatment plant, which directly affects the operating cost of sewage treatment. Therefore, the research and development of aeration technology and devices that can further reduce energy consumption, improve operational reliability, and adapt to new process requirements is an important topic in the development of sewage treatment technology.

Mechanical surface aeration consumes a lot of power, high energy consumption and low efficiency; the oxygenation capacity is low; and it is necessary to add a defoamer to eliminate the foam on the water surface, otherwise it is not conducive to oxygenation of the surface air.

Blast microporous aeration aerator has a small aeration hole diameter, which is easy to be blocked in long-term operation and inconvenient to maintain; the connection of aeration pipe fittings will fall off, making local aeration uneven, causing impact on activated sludge in water, Affect the water quality of the aeration system; the aeration membrane disc is easy to age, which causes the air outlet resistance of the fan to increase and the overall aeration effect to decrease.

Traditional jet aeration uses a submersible pump for jet flow, which forms a negative pressure to inhale air, and the efficiency of dissolved oxygen is not good; and the water pump is installed at the bottom of the pool, which is inconvenient for inspection and maintenance.

The related equipment on the market currently has the above problems. In order to overcome the above technical problems, the utility model provides a novel jet aerator with low investment, high oxygen dissolved efficiency, and convenient detection and maintenance.

Utility model content

The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide an environmentally friendly, energy-saving and economical new jet aerator.

The jet flow aerator of the utility model is composed of an inner nozzle and an outer nozzle. There are several nozzles on each of the inner nozzle and the outer nozzle, which are evenly distributed in a ring shape and symmetrical in the center; the inner nozzle on the inner nozzle is the same as the outer nozzle on the outer nozzle. One-to-one correspondence, the centers of the inner and outer nozzles are on the same straight line; the diameter of the inner nozzle is 25-50mm, and the diameter of the outer nozzle is 40-80mm. The utility model reduces the coalescence probability of microbubbles during aeration and improves the utilization rate of oxygen. The processing capacity and effect of the existing facilities can be greatly improved, and the nozzle of the utility model has a large diameter, and the long-term operation will not be blocked.

The inner spray head is characterized in that the top surface of the inner spray head is hemispherical. The circulating water changes direction along the arc surface after hitting the arc surface, not only the water pressure loss is small, the power consumption is small, but also the reflection effect is good, there is basically no water flow scattering, and the hydraulic shearing ability is strong. Secondly, the concave arc surface structure has good structural strength and high impact resistance, the required wall surface can be relatively thinned, the consumption of raw and auxiliary materials is small, and the cost is reduced. The nozzle of the utility model has a large caliber and is not blocked in long-term operation.

The utility model selects the blower to supply air according to the depth of the pool. Through positive pressure air supply, the working water depth is 1-2 times higher than that of conventional jet aeration devices, up to 5-12m.

The utility model is supplied with water by a circulation pump, and the pump body is installed outside the pool, which is more convenient for inspection and maintenance.

The utility model adopts stainless steel material. It has excellent anti-corrosion, anti-aging and anti-wear properties, and has a long service life, which is 5-10 times that of conventional aeration devices.

4. Description of the drawings:

Fig. 1 is the utility model aerator structure schematic diagram;

Figure 2 is a top view of the utility model aerator;

Fig. 3 is the actual application diagram of the utility model aerator.

Five specific implementation methods:

In conjunction with accompanying drawing 1, accompanying drawing 2 shows that the inner nozzle 4 is located in the middle of the outer nozzle 3, and the inner nozzle 4 and the outer nozzle 3 are on the same vertical center line; the lower part of the inner nozzle 4 and the lower part of the outer nozzle 3 are welded to form a Overall; the lower water inlet 2 of the inner nozzle 4 extends out of the outer nozzle 3, and the upper part of the outer nozzle 3 has an air inlet 1. Inner shower head 4, outer shower head 3 upper ring shape uniform (central symmetry) distributes some nozzles, the inner nozzle 5 of inner shower head 4 corresponds to the outer nozzle 6 on the outer shower head 3 one by one, and the center of circle of inner and outer nozzles is on the same line. A mixing chamber 7 is formed between the inner nozzle 6 and the outer nozzle 5 .

Referring to accompanying drawing 3, the blower 8 sends the airflow into the mixing chamber 7 in the outer nozzle 3 through the air inlet 1, and the circulation pump 9 sends the water flow into the inner nozzle 4 through the water inlet 2 at the lower part of the inner nozzle 4, and meets the spherical After the protrusion 12, it is refracted and sprayed into the mixing chamber 7 from the inner nozzle 6, and the air and water are mixed and dissolved oxygen for the first time in the mixing chamber 7. The unique mixed air chamber design, strong water flow and positive pressure air mixed injection, make the stirring even and safe, the generated bubbles are more and more delicate, and the efficiency of dissolved oxygen is significantly improved.

As shown in accompanying drawing 3, when the utility model is operated, the circulating water pump 9 is used to continuously extract circulating water from the pool and pressurize it to spray from the inner nozzle to form a high-speed and low-pressure columnar water flow; Positive air supply. The air is violently mixed with the water flow in the mixing chamber to form fine bubbles, which are mixed in the water flow and ejected from the outer nozzle, and are distributed to various parts of the pool at high speed in the horizontal direction for the second dissolved oxygen. In an efficient horizontal spray process, the air dissolves into the water very efficiently through the large contact surface formed by the fine air bubbles. The turbulence generated by the jet of water creates agitation in the pool. When the horizontal kinetic energy of the jet flow is reduced, the air-lift effect generated by the floating of the bubbles further makes the pool water obtain a good stirring effect.

The utility model is installed on the bottom of the aeration tank 10, fixed by the bracket 11 during installation, the upper end of the bracket is welded with the new aerator, and the lower end is fixed on the bottom of the pool by bolts.

Claims (3)

1. the novel jet flow aerator is made up of interior shower nozzle, outer shower nozzle, and it is characterized in that respectively has plurality of nozzles on interior shower nozzle, the outer shower nozzle, uniform distribution in the form of a ring, centrosymmetry; Inner nozzle on the interior shower nozzle is corresponding one by one with outer nozzle on the outer shower nozzle, and the center of circle of inner and outer nozzles is on same straight line; Inner nozzle bore 25-50mm, outer nozzle bore 40-80mm.

2. novel jet flow aerator according to claim 1, the end face of shower nozzle is semisphere in it is characterized in that.

3. novel jet flow aerator according to claim 1 is characterized in that being supplied water by recycle pump, and the pump housing is installed in outside the pond.

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