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 device 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] The present invention relates to the field of sewage treatment, and particularly to an anoxic tank air pressure stirrer. Background Art

[0002] In small sewage treatment systems, the common stirring methods for anoxic tanks are impeller stirring or air stirring. The impeller stirring effect is relatively ideal. For easy maintenance, a motor is usually installed above the sewage tank. If the top space of the sewage tank is insufficient, only air stirring can be used. For example, the invention with the application number 202022125856.5 discloses an air vent structure for an anaerobic tank or anoxic tank ventilation pipe. In this invention, a ventilation pipe is fixedly connected inside the anoxic tank, and a plurality of air outlets with different orientations and non-intersecting are opened on the pipe. When the ventilation pipe is ventilated, the air flow discharged 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 cannot significantly stir the surrounding water body. If the number of ventilation pipes is increased, the dissolved oxygen in the water will be significantly increased, which is not conducive to denitrification. Summary of the Invention

[0003] Aiming at the defects of the prior art, the present invention provides a low-energy consumption and high-efficiency anoxic tank stirrer with a small structure, which does not occupy the top space of the sewage tank, does not increase the dissolved oxygen in the water body, and uses compressed air as the power source.

[0004] The present invention is realized by the following technical solutions: An anoxic tank air pressure stirrer, including a water accumulation tank, a three-way solenoid valve, and a controller. It is characterized in that: the water accumulation tank has a hollow structure, is arranged in the anoxic tank, the top is exposed above the water surface, the bottom is provided with a large-diameter water inlet, and the top is provided with an air nozzle.

[0005] Further, one or more water inlets can be provided on the water accumulation tank.

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

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

[0008] Further, the pressure of the compressed air source is 0.25~0.4 Mpa.

[0009] Further, the air nozzles of one or more water accumulation tanks can be connected in parallel to the three-way solenoid valve through pipelines.

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

[0011] Further, when the three-way solenoid valve is closed, the air nozzle is connected to the atmosphere, and the sewage in the facultative pond is injected into the water storage tank through the water inlet; when the three-way solenoid valve is opened, the air nozzle is connected to the compressed air source, and under the action of air pressure, the sewage in the water storage tank is discharged at high speed through the water inlet, and the high-speed water flow is used to stir the sludge deposited at the bottom of the facultative pond to roll upward.

[0012] Beneficial effects: Since the present invention adopts the above structure, it has a simple and reliable structure, low energy consumption, uses compressed air to discharge the sewage injected into the water storage tank at high speed, has a relatively long range, uses the water flow to impact and stir the sludge deposited at the bottom of the facultative pond, has a good stirring effect, and basically does not increase the dissolved oxygen in the water body and does not occupy the external space of the sewage tank.

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments. Description of the Drawings

[0014] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required for use 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 denoted by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0015] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0016] Figure 2 It is a schematic top view structural diagram of an embodiment of the present invention.

[0017] Figure 3 It is a schematic sectional view structural diagram of the water storage tank of the present invention.

[0018] Figure 4 It is a three-dimensional structural diagram of the water storage tank of the present invention. Detailed Embodiments

[0019] In order to enable those skilled in the art to better understand the solution of 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 in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to describe the embodiments of the present application here.

[0021] In this application, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0022] Moreover, in addition to being used to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0023] In addition, terms such as "arranged", "provided with", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" 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 directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] In addition, the meaning of the term "plurality" should be two or more.

[0025] Hereinafter, this application will be described in detail with reference to the drawings and in conjunction with embodiments.

[0026] As Figures 1 to 4 shown, an anoxic pond air pressure stirrer includes a water storage 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 storage tank 2 has a hollow structure, is arranged in the anoxic pond 1, has its top exposed above the water surface, has one or more large-diameter water inlets 201 at the bottom, and has an air nozzle 202 at the top; the three ports of the three-way solenoid valve 3 are respectively connected to a compressed air gas source, the air nozzle 202 and the atmosphere through pipes.

[0027] Operation process: As Figure 1 、 Figure 3 shown, when the three-way solenoid valve 3 is in the closed state, the air nozzle 202 is connected to the atmosphere, the inner cavity of the water storage tank 2 is at normal pressure, and under the action of the liquid level pressure in the anoxic pond 1, the sewage in the anoxic pond is injected into the water storage tank 2 through the water inlet 201 until the liquid levels inside and outside the water storage tank are the same.

[0028] When the three-way solenoid valve 3 is in the open state, the air nozzle 202 is connected to the compressed air source. Compressed air sequentially passes through the three-way solenoid valve 3 and the air nozzle 202 and is injected into the water accumulation tank 2. Since the pressure of the compressed air is much greater than the liquid level pressure in the facultative pond 1, under the action of the air pressure, the sewage in the water accumulation tank 2 is discharged back to the facultative pond 1 at high speed through the water port 201. The high-speed water flow can fully stir the silt deposited at the bottom of the facultative pond to roll upward; when the sewage level in the water accumulation tank 2 is discharged to close to the height of the water port 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 level pressure in the facultative pond 1, the air in the water accumulation tank 2 is sequentially discharged to the atmosphere through the air nozzle 202 and the three-way solenoid valve 3, and the sewage in the facultative pond is injected into the water accumulation tank 2 through the water port 201 until the liquid levels inside and outside the water accumulation tank are the same.

[0029] Since the liquid level in the facultative pond 1 remains unchanged and the pressure of the compressed air remains unchanged, the time for the sewage in the facultative pond 1 to be injected into and discharged from the water accumulation tank 2 remains unchanged. The three-way solenoid valve 3 can be controlled by the controller 4 to be switched on and off regularly, so that the sewage at the bottom of the facultative pond 1 is intermittently stirred to prevent the activated sludge from always depositing at the bottom of the pond and causing dead sludge.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and the description of the present invention.

Claims

1. An anoxic tank air pressure stirrer, comprising a water storage tank (2), a three-way solenoid valve (3) and a controller (4), characterized in that: The water accumulation tank (2) has a hollow structure and is arranged in the anoxic-oxic tank (1), with its top exposed above the water surface, a large-diameter water inlet (201) provided at the bottom, and an air nozzle (202) provided at the top.

2. The anoxic pond air pressure stirrer according to claim 1, characterized in that: One or more water inlets (201) can be provided on the water accumulation tank (2).

3. The anoxic pond air pressure 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 a compressed air source, the air nozzle (202), and the atmosphere through pipelines.

4. The aerobic-anaerobic pond air pressure stirrer according to claim 3, characterized in that: The pressure of the compressed air source is 0.25 - 0.4 Mpa.

5. The anoxic pond air pressure agitator according to claim 4, characterized in that: The valve opening time of the three-way solenoid valve (3) is 12 - 15 seconds, and the ratio of the opening time to the closing time is 1:

25.

6. The anoxic pond air pressure stirrer according to claim 5, characterized in that: When the three-way solenoid valve (3) is closed, the air nozzle (202) is connected to the atmosphere, and the sewage in the anoxic-oxic tank (1) is injected into the water accumulation tank (2) through the water inlet (201); when the three-way solenoid valve (3) is opened, the air nozzle (202) is connected to the compressed air source, and under the action of air pressure, the sewage in the water accumulation tank (2) is discharged at high speed through the water inlet (201), and the high-speed water flow is used to stir the sludge deposited at the bottom of the anoxic-oxic tank (1) to roll upwards.

7. The anoxic pond air pressure stirrer according to claim 6, characterized in that: The three-way solenoid valve (3) can be connected in parallel with the air nozzles (202) of one or more water accumulation tanks (2) through pipelines.

Images