Novel dissolved air tank for sewage treatment

Abstract

The utility model relates to a novel dissolved air tank for sewage treatment. The dissolved air tank is characterized in that a tank body is in a vertical cylinder shape, the upper end and the lower end are hemispherical, the side wall of the tank body is provided with a water inlet pipe and a pressure gauge, the top is provided with an air inlet pipe and an emptying port, the bottom is provided with a water outlet, and the middle lower part is provided with a liquid level hole and a sampling port. A floating ball liquid level meter is installed in the tank body, communicated with an electromagnetic valve on the side wall of the tank body and used for accurately controlling the liquid level and the air inflow. The hollow ball filler is also arranged in the tank body and is of a perforated plate multi-surface structure, so that gas-liquid contact is facilitated, and the gas dissolving efficiency is improved. The gas dissolving device is stable in structure, accurate in control, high in gas dissolving efficiency and low in energy consumption.

Description

Technical Field

[0001] The present application relates to the field of water treatment technology, and specifically to a new type of dissolved air tank for sewage treatment. Background Art

[0002] A flotation device is a physical treatment device used to separate suspended solids and liquids. It uses bubbles to attach to solid particles, causing these particles to float to the surface of the liquid, and then remove them through a scraping or scum system. The flotation equipment in the prior art usually consists of a tank body, an air dissolving tank, an air compressor, a return water pump, etc., and is controlled by an electrical control box. In traditional sewage treatment processes, pressurized dissolved air flotation equipment is often used for solid-liquid and liquid-liquid separation. These devices achieve solid-liquid separation by increasing the air solubility of water and using microbubbles to adhere to impurity flocs. However, the air dissolving tanks in the prior art have problems such as low air dissolving efficiency and easy secondary pollution. Utility Model Content

[0003] The purpose of this application is to provide a new type of dissolved air tank for sewage treatment, which has a compact structure, is easy to manage and maintain, and has reliable operation, so as to improve sewage treatment efficiency and reduce environmental pollution. To achieve the above purpose, this application provides the following technical solution: A new type of dissolved air tank for sewage treatment, comprising:

[0004] The tank body is a vertical cylindrical body with hemispherical upper and lower ends, and is provided with a water inlet pipe, an air inlet pipe, a liquid level hole, a pressure gauge, a vent, a water outlet, and a sampling port. The water inlet is arranged on the side wall of the tank body, the air inlet is arranged on the top of the tank body, the liquid level hole is arranged in the middle and lower part of the tank body, the pressure gauge is arranged on the side wall of the tank body, the vent is arranged on the top of the tank body, the water outlet is located at the bottom of the tank body, and the sampling port is located in the middle and lower part of the tank body;

[0005] A float level gauge installed inside the tank;

[0006] A solenoid valve is installed on the air intake pipe and is used to control the air intake volume. The solenoid valve is connected to the float level gauge, and the float level gauge controls the switch of the solenoid valve.

[0007] Hollow balls are fillers arranged inside the tank body, and the hollow balls are multi-faceted structures of porous plates.

[0008] Preferably, the present technical solution further comprises an ejector, wherein one side of the diffuser tube of the ejector is connected to the water inlet of the water inlet pipe.

[0009] Preferably, the ejector includes an inlet section, a throat pipe and a diffuser that are connected in sequence, and a nozzle is provided at the throat pipe.

[0010] Preferably, the technical scheme further comprises a hanging ladder, which is arranged on the top of the tank body.

[0011] Preferably, the technical scheme further comprises a manhole, which is arranged on the top of the tank body.

[0012] Preferably, the technical scheme further comprises a flow meter, which is arranged on the water outlet and used for controlling and metering the water outlet amount.

[0013] Compared with the prior art, the application has the following beneficial effects:

[0014] The application provides a novel dissolved air tank for sewage treatment. The tank body is designed as a vertical cylindrical shape, and the upper and lower ends are hemispherical. This structure design can improve stability. Meanwhile, the tank body is provided with a water inlet pipe, an air inlet pipe, a liquid level hole, a pressure gauge, a vent, a water outlet, a sampling port and the like. The setting of the floating ball liquid level meter makes the liquid level control in the dissolved air tank more accurate. The floating ball liquid level meter is installed in the tank body and can monitor the liquid level height in real time. Through communication with the electromagnetic valve, the air inlet amount is automatically controlled, so that the problem of unsatisfactory dissolved air effect caused by excessively high or low liquid level is avoided. Furthermore, the hollow ball filler used in the novel dissolved air tank has a multi-hole plate multi-surface structure. This structure is beneficial to gas-liquid contact, improves the dissolved air efficiency, and is also beneficial to reducing energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a schematic view of a novel dissolved air tank for sewage treatment according to an embodiment of the application;

[0016] Figure 2 FIG. 2 is a top view of a novel dissolved air tank for sewage treatment according to an embodiment of the application;

[0017] Figure 3 FIG. 3 is a schematic view of a floating ball liquid level meter;

[0018] Figure 4 FIG. 4 is a schematic view of a jetifier;

[0019] Figure 5 FIG. 5 is a front view of the jetifier;

[0020] Figure 6 FIG. 6 is an A-A sectional view of the jetifier in FIG. 5; Figure 5

[0021] In the drawings: 1, tank body; 2, water inlet pipe; 3, air inlet pipe; 4, liquid level hole; 5, pressure gauge; 6, vent; 7, water outlet; 8, sampling port; 9, floating ball liquid level meter; 10, electromagnetic valve; 11, hollow ball; 12, jetifier; 13, inlet section; 14, throat pipe; 15, diffusion pipe; 16, nozzle; 17, hanging ladder; 18, manhole; 19, flow meter; ​DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0023] It should be noted that, in the description of the present application, the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0024] In addition, it should be understood that, for the convenience of description, the sizes of various components shown in the drawings are not drawn in accordance with the actual proportional relationship, for example: the thickness or width of certain layers can be exaggerated relative to other layers.

[0025] It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined or described in one drawing, it will not need to be further specifically discussed and described in the description of subsequent drawings.

[0026] To solve the technical problems in the background art, as shown in Figures 1-4 The present application provides a technical solution: a novel dissolved air tank for sewage treatment, characterized by:

[0027] The tank body 1 is a vertical cylindrical structure, and the upper and lower ends are designed as hemispherical shapes. This structure provides a larger internal space while enhancing the stability and strength of the tank body 1. The material of the tank body 1 is stainless steel, which has good corrosion resistance and strength. The tank body 1 is provided with the following components: the water inlet pipe 2 is arranged on the side wall of the tank body 1, which is used to introduce the sewage to be treated into the tank body 1. The air inlet pipe 3 is arranged on the top of the tank body 1, one end of which is connected to the air compressor, which is used to inject compressed air into the tank body 1. The liquid level hole 4 is arranged in the middle and lower part of the tank body 1, which is used to detect the liquid level height in the tank body 1. The pressure gauge 5 is arranged on the side wall of the tank body 1, which is used to monitor the pressure in the tank body 1. The vent port 6 is arranged on the top of the tank body 1, which is used to release the pressure in the tank body 1 to ensure safety. The water outlet 7 is located at the bottom of the tank body 1, which is used to discharge the water after dissolving gas. The sampling port 8 is located in the middle and lower part of the tank body 1, which is used for sampling and detecting the dissolved gas in the water. The sampling port 8 is generally directly connected to a faucet, which is convenient to close and open. The float ball liquid level meter 9 is installed inside the tank body 1, which is used to monitor the liquid level change in the tank body 1 in real time. The float ball liquid level meter 9 detects the liquid level by the up and down movement of the float ball and transmits the signal to the control system. Specifically, the high and low liquid level thresholds can be set. When the liquid level is lower than the low liquid level, the signal is transmitted to the electromagnetic valve 10 through the float ball liquid level meter 9, so as to reduce the air supply and reduce the air pressure in the tank body 1; when the liquid level is higher than the high liquid level, the signal is transmitted to the electromagnetic valve 10 through the float ball liquid level meter 9, so as to increase the air supply and increase the air pressure in the tank body 1. The electromagnetic valve 10 is installed on the air inlet pipe 3, which is used to accurately control the amount of air entering the tank body 1. The electromagnetic valve 10 is connected with the float ball liquid level meter 9, which automatically adjusts the air inlet according to the change of the liquid level, realizing automatic control. The hollow ball 11 is used as the filler in the tank body 1. The hollow ball 11 adopts a multi-faceted structure of perforated plate, which increases the gas-liquid contact area and improves the gas dissolution efficiency.

[0028] Further, the device includes a fluidic device 12, which is a device capable of mixing compressed air with water flow to improve gas dissolution efficiency. The fluidic device 12 sucks in air and mixes it with water through the suction force of its high-speed water flow, forming dissolved gas water containing a large number of small bubbles. The diffuser pipe 15 of the fluidic device 12 is a key component connected to the water inlet of the water inlet pipe 2. The design of the diffuser pipe 15 enables the high-speed water flow to generate negative pressure when passing through the fluidic device 12, thereby sucking in and mixing air. This design helps to improve the solubility of air in water.

[0029] It is important to note that the injector 12, as a key component for improving air dissolution efficiency in the dissolved air tank, includes an inlet section 13, a throat 14, and a diffuser 15 connected in sequence. The inlet section 13 is the starting part of the injector 12, designed to receive water flow from other components. The throat 14 is located after the inlet section 13, and is the part of the injector 12 with the highest flow rate. The narrow design of the throat 14 increases water flow speed, forming a negative pressure area around the throat 14, which helps to suck in air. The diffuser 15 is connected immediately after the throat 14, with the diameter of the diffuser 15 gradually increasing, designed to reduce water flow speed and increase air-water mixing. The outlet part of the diffuser 15 is connected to the water inlet of the water inlet pipe 2, ensuring that the mixed dissolved air water can smoothly enter the tank body 1. The nozzle 16 is arranged on the throat 14, which is the key point of water flow and air mixing. The design of the nozzle 16 causes high-speed water flow to form strong turbulence here, further promoting air intake and mixing, forming tiny air bubbles, and improving air solubility in water.

[0030] It is worth noting that the lifting lanyard 17 is arranged at the top of the tank body 1, which is an auxiliary device for lifting and moving the tank body 1. The lifting lanyard 17 is usually made of strong materials such as steel and is designed to withstand the weight of the tank body 1 and additional stress that may occur during lifting. The lifting lanyard 17 is designed with sufficient strength and rigidity to ensure the stability and safety of the tank body 1 during lifting.

[0031] It is important to note that the manhole 18 is arranged at the top of the tank body 1, which is an opening for personnel to enter and exit the inside of the tank body 1. The manhole 18 is usually equipped with a sealing cover to ensure the sealing of the inside of the tank body 1 during non-maintenance periods. The manhole 18 allows maintenance personnel to directly enter the inside of the tank body 1, facilitating cleaning, inspection, and repair work.

[0032] Further, the flow meter 19 is arranged at the water outlet 7, which is a device for measuring and controlling the amount of water discharged from the tank body 1. The flow meter 19 can be of various types, such as electromagnetic, vortex street, or ultrasonic, etc., and the specific choice depends on the accuracy requirements of the measured medium. The flow meter 19 can be integrated with the control system to achieve automatic flow control, improving the efficiency and reliability of the entire sewage treatment process. The flow meter 19 is designed to withstand the working pressure and temperature inside the tank body 1, as well as the corrosiveness of the treatment medium.

[0033] Although embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, replacements, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A new type of dissolved air tank for sewage treatment, characterized by, It comprises: a tank body (1) which is vertical and cylindrical with hemispherical upper and lower ends, and is provided with a water inlet pipe (2), an air inlet pipe (3), a liquid level hole (4), a pressure gauge (5), a vent port (6), a water outlet (7), and a sampling port (8), wherein the water inlet is arranged on the side wall of the tank body (1), the air inlet is arranged on the top of the tank body (1), the liquid level hole (4) is arranged in the middle lower part of the tank body (1), the pressure gauge (5) is arranged on the side wall of the tank body (1), the vent port (6) is arranged on the top of the tank body (1), the water outlet (7) is arranged at the bottom of the tank body (1), and the sampling port (8) is arranged in the middle lower part of the tank body (1); a floating ball liquid level meter (9) installed inside the tank body (1); a solenoid valve (10) installed on the air inlet pipe (3) for controlling the air inlet amount, and in communication with the floating ball liquid level meter (9), wherein the floating ball liquid level meter (9) controls the opening and closing of the solenoid valve (10); a hollow ball (11) which is a filler arranged inside the tank body (1), and has a porous plate multi-faceted structure.

2. The new dissolved air tank for sewage treatment according to claim 1, characterized in that, It also comprises a fluidic device (12), one side of the diffuser pipe (15) of which is connected to the water inlet of the water inlet pipe (2).

3. The new dissolved air tank for sewage treatment according to claim 2, characterized in that, The fluidic device (12) comprises an inlet section (13), a throat pipe (14), and a diffuser pipe (15) connected in sequence, and a nozzle (16) is arranged at the throat pipe (14).

4. The new dissolved air tank for sewage treatment according to claim 1, characterized in that, It also comprises a hanging ladder (17) arranged on the top of the tank body (1).

5. The new dissolved air tank for sewage treatment according to claim 1, characterized in that, It also comprises a manhole (18) arranged on the top of the tank body (1).

6. The new dissolved air tank for sewage treatment according to claim 1, characterized in that, It also comprises a flow meter (19) arranged at the water outlet (7) for controlling and metering the water outlet amount.

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