Air pressure stirrer for facultative tank

Abstract

A facultative tank air pressure stirrer comprises a water accumulation tank, a three-way electromagnetic valve and a controller, the water accumulation tank is of a hollow structure and arranged in a facultative tank, the top of the water accumulation tank is exposed out of the water surface, a large-caliber water opening is formed in the bottom, and an air tap is arranged on the top; the three-way electromagnetic valve is electrically connected with the controller, and three ports of the three-way electromagnetic valve are connected with a compressed air source, an air nozzle and the atmosphere through pipelines respectively. The sewage tank is simple and reliable in structure and low in energy consumption, sewage injected into the water accumulation tank is discharged at a high speed through compressed air, the jet range is long, sludge deposited at the bottom of the facultative tank is impacted and stirred through water flow, the stirring effect is good, dissolved oxygen of a water body is basically not increased, and the external space of the sewage tank is not occupied.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment, specifically to an anoxic tank pneumatic agitator. Background Technology

[0002] In small-scale wastewater treatment systems, the commonly used methods for stirring in anaerobic tanks are impeller stirring or air stirring. Impeller stirring has a more ideal effect. For ease of maintenance, a motor is usually installed on the wastewater tank. If there is not enough space at the top of the wastewater tank, air stirring can only be used. For example, the invention with application number 202022125856.5 discloses an air hole structure for the air pipe of an anaerobic or anaerobic tank. This invention has an air pipe fixedly connected in the anaerobic tank, and multiple air outlets with different orientations and non-intersecting openings are opened on the pipe. When air is vented through the air pipe, the airflow exiting from the air outlets has multiple angles. However, since the density of air is much smaller than that of water, the lateral propagation path of air in water is very short. Therefore, the actual use effect of this invention is not to significantly stir the surrounding water. If the number of air pipes is increased, the dissolved oxygen in the water will be significantly increased, which is not conducive to denitrification. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this utility model provides a compact, low-energy, high-efficiency anaerobic tank agitator that does not occupy the top space of the sewage tank, does not increase dissolved oxygen in the water, and is powered by compressed air.

[0004] This utility model is achieved by the following technical solution: an anoxic tank air pressure agitator, including a water collection tank, a three-way solenoid valve and a controller, characterized in that: the water collection tank has a hollow structure, is set in the anoxic tank, with the top exposed above the water surface, a large-diameter water inlet at the bottom, and an air nozzle at the top.

[0005] Furthermore, the water tank may be equipped with one or more water inlets.

[0006] Furthermore, the three ports of the three-way solenoid valve are respectively connected to a compressed air source, an air nozzle, and the atmosphere via pipes.

[0007] Furthermore, the three-way solenoid valve is electrically connected to the controller.

[0008] Furthermore, the compressed air source pressure is 0.25~0.4 MPa.

[0009] Furthermore, the three-way solenoid valve can be connected in parallel with the air nozzles of one or more water tanks via a pipeline.

[0010] Furthermore, the opening time of the three-way solenoid valve is 12-15 seconds, and the ratio of the opening and closing times is 1:25.

[0011] Beneficial effects: Due to the above structure, this utility model is simple and reliable, with low energy consumption. It uses compressed air to discharge sewage injected into the water tank at high speed with a long range. It uses water flow to impact and stir the sludge deposited at the bottom of the anaerobic tank, resulting in good stirring effect. It also does not increase the dissolved oxygen in the water and does not occupy the external space of the sewage tank.

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model.

[0015] Figure 2 This is a top view of an embodiment of the present invention.

[0016] Figure 3 This is a cross-sectional structural diagram of the water collection tank of this utility model.

[0017] Figure 4 This is a three-dimensional structural diagram of the water tank of this utility model. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate for the embodiments of this application described herein.

[0020] In this application, the terms "upper," "lower," "inner," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily used to better describe this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0021] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0022] Furthermore, the terms "set up," "equipped with," "connected," and "fixed" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In addition, the term "multiple" should mean two or more.

[0024] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figures 1-4 As shown, an anoxic tank pneumatic agitator includes a water tank 2, a three-way solenoid valve 3, and a controller 4. The three-way solenoid valve is electrically connected to the controller. The water tank 2 has a hollow structure and is installed inside the anoxic tank 1. The top of the tank is exposed above the water surface, and the bottom is provided with one or more large-diameter water inlets 201. The top is provided with an air nozzle 202. The three ports of the three-way solenoid valve 3 are respectively connected to a compressed air source, an air nozzle 202, and the atmosphere through pipes.

[0026] Action process: such as Figure 1 , Figure 3 As shown, when the three-way solenoid valve 3 is closed, the air nozzle 202 is connected to the atmosphere, and the inner cavity of the water collection tank 2 is at normal pressure. Under the action of the liquid level pressure in the anoxic tank 1, the sewage in the anoxic tank is injected into the water collection tank 2 through the water inlet 201 until the liquid levels inside and outside the water collection tank are the same.

[0027] When the three-way solenoid valve 3 is open, the air nozzle 202 is connected to the compressed air source. The compressed air is injected into the water collection tank 2 through the three-way solenoid valve 3 and the air nozzle 202. Since the pressure of the compressed air is much greater than the liquid pressure in the anoxic tank 1, the sewage in the water collection tank 2 is discharged back to the anoxic tank 1 at high speed through the water outlet 201 under the action of air pressure. The high-speed water flow can fully agitate the sludge deposited at the bottom of the anoxic tank and roll it upward. When the sewage level in the water collection tank 2 is discharged to a height close to that of the water outlet 201, the three-way solenoid valve 3 is closed, and the air nozzle 202 is connected to the atmosphere. Under the action of the liquid pressure in the anoxic tank 1, the air in the water collection tank 2 is discharged to the atmosphere through the air nozzle 202 and the three-way solenoid valve 3. The sewage in the anoxic tank is injected into the water collection tank 2 through the water outlet 201 until the liquid levels inside and outside the water collection tank are the same.

[0028] Since the liquid level and compressed air pressure in the anoxic tank 1 remain constant, the time for sewage to be injected into and discharged from the sludge collection tank 2 in the anoxic tank 1 remains constant. The three-way solenoid valve 3 can be switched on and off at a time by the controller 4 to intermittently agitate the sewage at the bottom of the anoxic tank 1, thus preventing activated sludge from continuously accumulating at the bottom of the tank and causing dead sludge.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. An anoxic tank pneumatic agitator, comprising a water collection tank (2), a three-way solenoid valve (3), and a controller (4), characterized in that: The water collection tank (2) has a hollow structure and is set inside the anoxic pool (1). The top is exposed above the water surface, the bottom is provided with a large-diameter water inlet (201), and the top is provided with an air nozzle (202).

2. The anoxic tank pneumatic agitator according to claim 1, characterized in that: The water tank (2) may be equipped with one or more water inlets (201).

3. The anoxic tank pneumatic agitator according to claim 1, characterized in that: The three-way solenoid valve (3) is electrically connected to the controller (4), and the three ports of the three-way solenoid valve are respectively connected to the compressed air source, the air nozzle (202) and the atmosphere through pipes.

4. The anoxic tank pneumatic agitator according to claim 3, characterized in that: The compressed air source pressure is 0.25~0.4 MPa.

5. The anoxic tank pneumatic agitator according to claim 4, characterized in that: The three-way solenoid valve (3) has an opening time of 12-15 seconds and an opening / closing time ratio of 1:

25.

6. The anoxic tank pneumatic agitator according to claim 5, characterized in that: The three-way solenoid valve (3) can be connected in parallel with the air nozzle (202) of one or more water tanks (2) via a pipeline.

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