CN2688691Y

CN2688691Y - High-efficient cellular aerating head

Info

Publication number: CN2688691Y
Application number: CNU2004200499331U
Authority: CN
Inventors: 王东海
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-04-26
Filing date: 2004-04-26
Publication date: 2005-03-30
Anticipated expiration: 2014-04-26

Abstract

The utility model discloses a high efficient aeration head used for the flow of micro pore gas. The lower part of the aeration head is provided with a gas inlet, the upper part of the aeration head is connected with a gas head cover, and the central part of the aeration head forms an airtight cavity for gas storage; a gas flow rotator is arranged close to the upper part of the gas inlet in the cavity for gas storage; the gas flow rotator is connected with the gas inlet and the cavity for gas storage through screw bolts, and the gas flow rotator is in a structure of a convex surface; bulges are arranged at intervals toward the direction of the gas inlet and along the periphery of the rotator, the bulges incline in the same direction toward the two sides of the center of the rotator, and the inlet air can be formed into vortex flow in the cavity. The gas head cover is a cover with multiple pores; the inner surface connected with the hollow cavity of the air head cover is provided with micro pores, and each micro pore is connected with an inverted conic opening om the outer surface for forming funnel-shaped gas outlets; multiple trough lines extending from the top of an inverted circular cone to the bottom of the inverted circular cone along the surface of the inverted circular cone are arranged on the inverted circular cone. The high efficient aeration head of the utility model enlarges the contact area of gas bubbles and water for dissolving oxygen quickly and increases the dissolved amount of the oxygen in the water; the utility model has important value for practical application.

Description

Efficient micro porous aeration head

Technical field

The utility model relates to the oxygen replenishing equipment that uses in the sewage treatment area BAF, especially a kind of wandering efficient micro porous aeration head of gas that is used for.

Background technology

BAF is a kind of new and effective sewage disposal technology, has been widely applied in the processing of all kinds of sewage.In sewage treatment process, when especially carrying out biochemical treatment, oxygen content is big especially to the influence of microorganism in the sewage in the sewage.In the use of BAF, gordian technique is the design of aeration head.Existing aeration head, for example umbrella shape aeration head, dentation aeration are first-class, produce than air pocket in actual applications, thereby the contact area of bubble and water is little, oxygen dissolution is slower in the speed of water, even improved micro porous aeration head, the effect of dissolved oxygen also is difficult to meet the demands, and has not only increased aeration time, prolongs the sewage disposal cycle, and because the oxygen concentration in the water is difficult to reach certain value, the efficient of microorganism is also relatively low in feasible the disposing of sewage.

Summary of the invention

The utility model provides a kind of efficient micro porous aeration head that is used for gaseous diffusion in order to address the above problem, and can form less bubble when aeration, thereby effectively improves the speed of oxygen dissolution in water.

The utility model improves existing aeration head, and a kind of novel efficient micro porous aeration head that is used for gaseous diffusion is provided, and its technical scheme is:

The aeration head below is an inlet mouth, top connects the gas head-shield, the middle part forms airtight air storing cavity, above in air storing cavity, pressing close to inlet mouth an airflow rotator is set, be connected with air storing cavity with inlet mouth by bolt, this airflow rotator slightly becomes convex surface, and it is provided with projection towards the inlet mouth direction along the turner peripheral intervals, projection tilts in the same way towards the both sides at turner center, can make inlet gas form eddy current in the chamber; Described gas head-shield is a perforated lid, and the internal surface that connects cavity is provided with micropore, and each micropore is connected with the inverted cone opening of outside surface, formation doline pneumatic outlet, on inverted cone, have several along the conical surface from the vertex of a cone to the line of rabbet joint of boring the end.

The angle of inclination of described exterior is 45 °～60 °, can form venturi effect preferably like this, can make air-flow in air storing cavity internal pressure balance.

Described reverse taper drift angle is 90 °～150 °, and when high pressure boundling gas micropore when ejection in air cavity, gas is dispersed into vaporific along the cone line, can obtain less bubble, increases the contact area of bubble and water, thus the solubleness of raising gas in water.

Described micropore distribution density is 12～20/cm ²

Described aeration head is to adopt tetrafluoroethylene, PVC or stainless material preparation and get, and does not stop up, and does not corrode, and installs and uses easy.

The principle of work of the utility model aeration head is, air-flow enters air storing cavity from inlet mouth through airflow rotator, keep the gaseous tension equilibrium, gas after the equilibrium is upward through the micropore on the gas head-shield, form high pressure boundling gas, high pressure boundling gas sprays along the cone on the gas head-shield outside surface, be divided into a few bundle gases by the line of rabbet joint on the cone, move to loose along the conical surface and nebulize, form uniform tiny bubble, increase the contact area of oxygen and water, thereby realized the efficient dissolving of oxygen in water.

The utility model is that the contriver investigates numerous sewage works, from the professional technique of sewage disposal and in conjunction with national conditions, and a kind of sewage disposal professional equipment of research preparation.Because the increase of airflow rotator and the particular design of microvoid structure, increased the contact area of bubble and water, dissolved oxygen fast, greatly improve the meltage of oxygen in water, thereby shorten the sewage treatment process time, reduce production costs, and device simplicity of design, easy for installation, satisfy industrial needs, have important application value.

Description of drawings

Fig. 1 is the longitudinal sectional view of the utility model aeration head

Fig. 2 is the airflow rotator birds-eye perspective

Fig. 3 A overlooks enlarged view for the front of micropore among Fig. 1

Fig. 3 B is the side cutaway view Amplified image of micropore among Fig. 1

Embodiment

With reference to the drawings and specific embodiments the utility model is further described, but be not used in restriction scope of the present utility model.

As shown in Figure 1, aeration head 11 belows are inlet mouth 1, top connects gas head-shield 7, the middle part forms airtight air storing cavity 5, above in air storing cavity 5, pressing close to inlet mouth 1 airflow rotator 4 is set, be connected with air storing cavity 5 with inlet mouth 1 by turner standing bolt 3, this airflow rotator 4 slightly becomes convex surface, it is provided with projection 8 towards inlet mouth 1 direction along turner 4 peripheral intervals, projection 8 tilts in the same way towards the both sides at turner 4 centers, and the tilt angle theta on protruding 8 both sides is 45 °～60 ° (as shown in Figure 2).When gas when inlet mouth 1 enters turner 4, owing to projection 8 makes gas form eddy current, enter air storing cavity 5 by swirling eddy outlet 2, venturi effect is preferably arranged in air storing cavity 5, and makes air-flow in air storing cavity, reach pressure equilibrium.

In order to keep stopping property and the certain pressure value in the air storing cavity 5, a gasket 6 is arranged between gas head-shield 7 and air storing cavity 5.

Gas head-shield 7 is a perforated lid, and the internal surface that connects air storing cavity 5 is provided with micropore 9, and each micropore 9 expands neck opening with the inverted cone of outside surface and is connected, and forms the doline pneumatic outlet, and the reverse taper drift angle is 90 °～150 °, as shown in Figure 3A.On inverted cone, have several along the conical surface from the vertex of a cone to the awl end the line of rabbet joint 10, shown in Fig. 3 B.The density that micropore 9 distributes on the gas head-shield is 12～20/cm ²Described micropore 9 recess diameters are about 0.5～1.5mm or littler, expand recess diameter and be about 2.5～3.5mm or littler.

Air storing cavity internal pressure isostatic gas is upward through the micropore 9 on the gas head-shield, form high pressure boundling gas, when high pressure boundling gas in air cavity during micropore 9 ejection, gas is dispersed into several mist flow along several line of rabbet joint 10, shown in Fig. 3 B, can obtain less bubble, increase the contact area of bubble and water, thereby improve the solubleness of gas in water.

The utility model aeration head is to adopt tetrafluoroethylene, PVC or stainless material preparation and get, and does not stop up, and does not corrode, and installs and uses easy.

The same terms successively carries out aeration test to the utility model high efficient aeration head, umbrella shape aeration head and micro porous aeration head down.

Test conditions is as follows: at 2m ³Put aeration head in the clear water, connect compressor, inflate, compressor pressure maintains about 0.15MPa, and air input is 0.3m ³/ h, respectively at 0 minute, 10 minutes, 20 minutes and 30 minutes, use dissolved oxygen meter to detect water oxygen gas content, obtain relevant oxygen value.Concrete test detected result is as shown in table 1.

Table 1

	Pressure MPa	Air input m ³/h	Oxygen value 0 minute	Oxygen value	10 minutes	Oxygen value 20 minutes	Oxygen value 30 minutes
	Pressure MPa	Air input m ³/h	Oxygen value 0 minute	Oxygen value	10 minutes	Oxygen value 20 minutes	Oxygen value 30 minutes	The utility model aeration head	0.15	0.3	2.7	6.97	8.48	8.48
The umbrella shape aeration head	0.15	0.3	2.7	4.72	7.06	7.10		The utility model aeration head	0.15	0.3	2.7	6.97	8.48	8.48
The umbrella shape aeration head	0.15	0.3	2.7	4.72	7.06	7.10	Micro porous aeration head	0.15	0.3	2.7	5.96	7.59	7.62

As can be known from Table 1, when three kinds of aeration heads carry out water treatment, in 20 minutes, water oxygen gas content is all saturated substantially, still, uses the utility model aeration head, be compared to aeration head of the prior art, can promote that oxygen dissolves fast, in water, can reach higher meltage, can reach biological degradation effect preferably.In actual applications, the utility model aeration head can shorten process treatment time, saves industrial cost, and has higher oxygen content, helps the biological degradation of sewage, has important use and is worth.

Claims

1, a kind of high efficient aeration head, the aeration head below is an inlet mouth, top connects the gas head-shield, the middle part forms airtight air storing cavity, it is characterized in that: press close to inlet mouth in air storing cavity above an airflow rotator is set, is connected with air storing cavity with inlet mouth by bolt, this airflow rotator slightly becomes convex surface, it is provided with projection towards the inlet mouth direction along the turner peripheral intervals, and projection tilts in the same way towards the both sides at turner center, can make inlet gas form eddy current in the chamber; Described gas head-shield is a perforated lid, and the internal surface that connects cavity is provided with micropore, and each micropore is connected with the inverted cone opening of outside surface, formation doline pneumatic outlet, on inverted cone, have several along the conical surface from the vertex of a cone to the line of rabbet joint of boring the end.

2, the described aeration head of claim 1 is characterized in that: the angle of inclination of described exterior is 45 °～60 °.

3, the described aeration head of claim 1 is characterized in that: described inverted cone drift angle is 90 °～150 °.

4, the described aeration head of claim 1 is characterized in that: described pore density is 12～20/cm ²

5, the described aeration head of claim 1 is characterized in that: be provided with gasket between gas head-shield and air storing cavity.

6, the described aeration head of claim 1 is characterized in that: described aeration head is to adopt tetrafluoroethylene, PVC or stainless material preparation and get.