Air flotation machine for industrial sewage treatment

Abstract

The utility model belongs to the technical field of industrial sewage treatment, and particularly relates to an air flotation machine for industrial sewage treatment, which comprises a sewage pipe and a plurality of air flotation boxes distributed in an obliquely upward array, the sides, close to each other, of two adjacent air flotation boxes are fixedly connected together, the lowest air flotation box is communicated with the sewage pipe, and the sewage pipe is communicated with the sewage pipe. A sewage pump is arranged between every two adjacent air floating boxes in a communicating mode, the water inlet end of each sewage pump extends into the adjacent lower air floating box, the output end of each sewage pump extends into the adjacent upper air floating box, a filter net cage is inserted into an upper opening of the lowermost air floating box, and porous air pipes are horizontally inserted into the air floating boxes; one end of each porous air pipe is of a closed structure, and the other end of each porous air pipe extends out of the air floating box. According to the utility model, sewage can be treated step by step according to gradients, floating objects are transferred into the lowermost air floating box, and the floating objects can be conveniently gathered to be cleaned in a concentrated manner.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial sewage treatment, and particularly relates to an air flotation machine for industrial sewage treatment. Background Art

[0002] A sewage treatment flotation machine is a device that uses the principle of gas and liquid separation to treat water. It generates a large number of tiny bubbles, causing air to attach to floating particles in the form of highly dispersed bubbles, resulting in a state with a density lower than that of water. Buoyancy allows the particles to float on the water surface, thus achieving solid-liquid separation.

[0003] Traditionally, wastewater is pumped into a flotation tank, where a sufficient amount of flocculants and other chemicals are added. A stirrer continuously agitates the water. An exhaust pipe is located within the tank, and an air compressor pumps tiny bubbles through the microscopic holes in the pipe into the wastewater. Floating particles gradually rise to the surface, where they gather and are removed by a scraper.

[0004] After the existing sewage is sent into the flotation tank, it is intermittently separated by multiple sets of partition plates and restriction plates to extend the retention time of the sewage in the flotation tank. These restriction plates are pushed by a cylinder to move left and right, separating the sewage while also separating floating objects, so that the floating objects are dispersed throughout the water surface, making it inconvenient to gather the floating objects for centralized cleaning. For this reason, we propose an air flotation machine for industrial sewage treatment. Utility Model Content

[0005] The utility model aims to provide an air flotation machine for industrial sewage treatment, which can treat sewage step by step according to a gradient and transfer floating objects into an air flotation box at the bottom, so as to conveniently gather the floating objects for centralized cleaning.

[0006] The technical solutions adopted by this utility model are as follows:

[0007] A flotation machine for industrial sewage treatment, comprising a sewage pipe and a plurality of flotation tanks distributed in an obliquely upward array, wherein two adjacent flotation tanks are fixedly connected together on one side close to each other, the bottom flotation tank is connected to the sewage pipe, and a sewage pump is provided between the two adjacent flotation tanks, the water inlet end of the sewage pump extends into the interior of the adjacent lower flotation tank, the output end of the sewage pump extends into the interior of the adjacent upper flotation tank, a filter cage is inserted into the upper opening of the bottom flotation tank, and a multi-porous air pipe is horizontally inserted into the interior of the flotation tank, one end of the multi-porous air pipe is a closed structure, and the other end of the multi-porous air pipe extends out of the interior of the flotation tank. When the industrial sewage is post-treated, it is passed into the bottom flotation tank along the sewage pipe. Floatation tank, and then start each sewage pump to lift the sewage to each flotation tank in the order of increasing height. Flocculants and other agents are added to each flotation tank at regular intervals. At the same time, the air compressor is started to pump compressed air along the porous air pipes to the inside of the flotation tank, generating tiny bubbles that combine with impurities to float and rise to the sewage surface to form floating objects, which can treat sewage step by step according to the gradient. Then, the sewage pump is started in the order from high to low to transport excess sewage to the flotation tank with high power. After the water level in the flotation tank rises, part of the sewage carries floating objects and flows out along the gap of the flotation tank to which it belongs, and falls into the adjacent flotation tank below. It is lowered in the order of decreasing gradient until the floating objects are transferred into the lowest flotation tank and fall into the filter cage, which is convenient for gathering floating objects for centralized cleaning.

[0008] An electric water valve is fixedly connected between the water inlet end of the sewage pump and the outer side of the adjacent flotation tank. A control panel is provided on the outside of the flotation tank. The control panel signal is connected to the sewage pump and the electric water valve. In order to isolate the sewage in each flotation tank, a specific electric water valve can be closed to a preset degree according to the control panel, thereby cutting off the sewage passage between two adjacent flotation tanks, making it easier for a higher-position sewage pump to transport excess sewage to its corresponding flotation tank, causing sewage overflow at the gap in the flotation tank.

[0009] It also includes two parallel baffles, the sides of the two baffles close to each other are fixedly connected to the two sides of the flotation tank, and the other side of one of the baffles is fixedly connected to the back of the control panel. The two baffles extend horizontally to both sides for workers to step on, making it convenient for workers to add reagents or observe. The two baffles block from both sides to reduce splashing when sewage overflows.

[0010] An air pipe is provided below the air flotation box. The interior of the air pipe is connected to the interior of the porous air pipe. Several porous air pipes are connected to the air compressor through the air pipe to uniformly transport compressed gas, which is convenient for maintaining similar air pressure to stabilize the air output.

[0011] At least two hooks are fixed on both sides of the filter cage, and the lower surfaces of the hooks are placed on the upper edge of the lowest flotation box. The hooks are used to support the filter cage upward to prevent the filter cage from falling into the flotation box. The filter cage is conveniently suspended on the water surface and can catch floating objects falling from above.

[0012] A drain valve is fixed on the side of the top flotation tank away from the sewage pipe. After the floating objects are removed, the drain valve can be opened regularly to discharge the treated sewage.

[0013] The technical effects achieved by this utility model are:

[0014] The utility model discloses an air flotation machine for industrial sewage treatment. When the industrial sewage is post-treated, the sewage is passed into the lowest air flotation tank along the sewage pipe, and then each sewage pump is started to lift the sewage to each air flotation tank in the order of increasing height. Flocculants and other agents are regularly added to each air flotation tank, and at the same time, the air compressor is started to pump compressed air along each porous air pipe into the air flotation tank, so that tiny bubbles are generated and combined with impurities to float, and rise to the sewage surface to form floating objects, which can be treated step by step according to the gradient. Then, the sewage pump is started in the order from high to low to transport excess sewage into the air flotation tank with high power. After the water level in the air flotation tank is raised, part of the sewage carries the floating objects and flows out along the gap of the corresponding air flotation tank, and falls into the adjacent air flotation tank below. The floating objects are lowered in the order of decreasing gradient until they are transferred into the lowest air flotation tank and fall into the filter cage, which is convenient for gathering the floating objects for centralized cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of an air flotation machine for industrial sewage treatment according to the utility model;

[0016] Figure 2 This is a top view of an air flotation machine for industrial sewage treatment according to the utility model;

[0017] Figure 3 This is a rear view of the sewage pump of the present utility model;

[0018] Figure 4 It is a front view of the filter cage of the present utility model.

[0019] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0020] 1. Sewage pipe; 2. Flotation tank; 3. Sewage pump; 4. Filter cage; 5. Multi-porous air pipe; 6. Electric water valve; 7. Control panel; 8. Baffle; 9. Gas pipe; 10. Hook; 11. Drain valve. DETAILED DESCRIPTION

[0021] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the following embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention and does not strictly limit the scope of protection of the present invention.

[0022] like Figure 1-4 As shown, an air flotation machine for industrial sewage treatment includes a sewage pipe 1, the water inlet end of the sewage pipe 1 is connected to the industrial sewage pumping station, and also includes a plurality of air flotation tanks 2 distributed in an oblique array. The air flotation tanks 2 are notched near the upper edge of the sewage pipe 1. The sides of two adjacent air flotation tanks 2 close to each other are fixedly connected together. The bottom air flotation tank 2 is connected to the sewage pipe 1. A sewage pump 3 is provided between the two adjacent air flotation tanks 2. The sewage pump 3 can be a WQD series horizontal sewage pump, which has the characteristics of compact structure, small footprint, and easy maintenance. Point, the power is adjustable, the water inlet end of the sewage pump 3 extends into the interior of an adjacent flotation tank 2 below, the output end of the sewage pump 3 extends into the interior of an adjacent flotation tank 2 above, and a filter cage 4 is inserted into the opening of the bottom flotation tank 2. The filter cage 4 is provided with a plurality of long holes, and the aperture of the long hole is less than 0.5mm. A porous air pipe 5 is inserted horizontally inside the flotation tank 2, and one end of the porous air pipe 5 is a closed structure. A plurality of micropores are provided on the outside of the porous air pipe 5 at the position inside the flotation tank 2, and the other end of the porous air pipe 5 extends out of the flotation tank 2 The other end is connected to the air compressor. After pre-treatment, the industrial sewage is passed into the bottom flotation tank 2 along the sewage pipe 1. Then, each sewage pump 3 is started to lift the sewage to each flotation tank 2 in the order of increasing height. Flocculants and other agents are added to each flotation tank 2 at regular intervals. At the same time, the air compressor is started to compress air and pump it into the flotation tank 2 along each porous air pipe 5, generating tiny bubbles that float with impurities and rise to the sewage surface to form floating objects. The sewage can be treated step by step according to the gradient, and then the sewage can be treated step by step according to the gradient. The sewage pump 3 is started in a descending order to transport excess sewage into the flotation tank 2 at high power. After the water level in the flotation tank 2 rises, part of the sewage carries floating objects and flows out along the gap of the flotation tank 2 to which it belongs, and falls into the adjacent flotation tank 2 below. The sewage is lowered in this order according to the gradient until the floating objects are transferred into the lowest flotation tank 2 and fall into the filter cage 4, which is convenient for gathering the floating objects for centralized cleaning. The filter cage 4 is lifted to flow out the excess sewage and filter out the floating objects. After the floating objects are removed and the filter cage 4 is cleaned, it is put back into the lowest flotation tank 2.

[0023] Among them, a dissolved air flotation machine, referenced in Chinese Utility Model Publication No. CN221027807U, may also include an agitator. While introducing tiny bubbles, the agitator continuously stirs the wastewater in the flotation tank 2, accelerating flocculation and producing floating matter. Furthermore, the aforementioned step-by-step sewage treatment method involves decreasing the amount of impurities in the wastewater according to the order in which the wastewater enters the flotation tank 2, resulting in varying degrees of flocculation.

[0024] Furthermore, the closed end of the porous air tube 5 can be configured as a multi-head structure and distributed to different positions inside the flotation tank 2 to increase the area for spraying tiny bubbles.

[0025] like Figure 1 、 Figure 2 and Figure 3 As shown, an electric water valve 6 is fixedly connected between the water inlet end of the sewage pump 3 and the outside of the adjacent flotation tank 2. A control panel 7 is provided on the outside of the flotation tank 2. The control panel 7 can be a Mitsubishi series industrial computer. The signal of the control panel 7 is connected to the sewage pump 3 and the electric water valve 6. The electric water valve 6 can be a DN300 model pre-pump inlet electric gate valve. To isolate the sewage in each flotation tank 2, a specific electric water valve 6 can be closed at a preset level according to the control panel 7, thereby isolating the sewage in each flotation tank 2, thereby isolating the sewage passage between two adjacent flotation tanks 2. This allows the sewage pump 3 at a higher position to transport excess sewage to its corresponding flotation tank 2, causing sewage overflow at the gap in the flotation tank 2.

[0026] like Figure 1 、 Figure 2 and Figure 3 As shown, two parallel baffles 8 are further included. The sides of the two baffles 8 that are close to each other are fixedly connected to the two sides of the flotation tank 2. The other side of one of the baffles 8 is fixedly connected to the back of the control panel 7. The two baffles 8 extend horizontally to both sides for workers to step on, making it convenient for workers to add reagents or observe. In addition, the two baffles 8 block from both sides to reduce splashing when sewage overflows.

[0027] like Figure 1 and Figure 2 As shown, an air pipe 9 is provided below the flotation tank 2, and the interior of the air pipe 9 is connected to the interior of the porous air pipe 5. Several porous air pipes 5 are connected to the air compressor through the air pipe 9 to uniformly transport compressed gas, which is convenient for maintaining similar air pressure to stabilize the gas output.

[0028] like Figure 1 、 Figure 2 and Figure 4 As shown, at least two hooks 10 are fixed on both sides of the filter cage 4, and the lower surfaces of the hooks 10 are placed on the upper edge of the lowest flotation box 2. The hooks 10 are used to support the filter cage 4 upward to prevent the filter cage 4 from falling into the flotation box 2. It is convenient for the filter cage 4 to be suspended on the water surface and can catch floating objects falling from above.

[0029] like Figure 1 and Figure 2 As shown, a drain valve 11 is fixed to the side of the top flotation tank 2 away from the sewage pipe 1. The drain valve 11 can be a manual valve or an electric gate valve and is connected to the control panel 7 by signal. After removing floating objects, the drain valve 11 can be opened regularly to discharge the treated sewage.

[0030] The working principle of the utility model is as follows: during the post-treatment of industrial wastewater, the wastewater is introduced into the flotation tank 2 at the bottom along the sewage pipe 1, and then each sewage pump 3 is started to lift the wastewater to each flotation tank 2 in the order of increasing height. Flocculants and other agents are regularly added to each flotation tank 2, and at the same time, the air compressor is started to compress air and pump it into the flotation tank 2 along each porous air pipe 5, generating tiny bubbles that float with impurities and rise to the surface of the wastewater to form floating objects, so that the wastewater can be treated step by step according to the gradient.

[0031] Then, the sewage pump 3 is started in a descending order to transport excess sewage into the flotation tank 2 at a high power. After the water level in the flotation tank 2 rises, part of the sewage carries floating objects and flows out along the gap of the flotation tank 2 to which it belongs, and falls into the adjacent flotation tank 2 below. The sewage is lowered in a descending order until the floating objects are transferred into the bottom flotation tank 2 and fall into the filter cage 4, which makes it convenient to gather the floating objects for centralized cleaning. Lifting the filter cage 4 can flow out the excess sewage and filter out the floating objects.

[0032] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. An air flotation machine for industrial wastewater treatment, comprising a sewage pipe (1), characterized in that: The invention also comprises a plurality of flotation tanks (2) distributed in an obliquely upward array, wherein the sides of two adjacent flotation tanks (2) close to each other are fixedly connected together, the bottom flotation tank (2) is connected to the sewage pipe (1), and a sewage pump (3) is provided between the two adjacent flotation tanks (2), the water inlet end of the sewage pump (3) extends into the interior of the adjacent bottom flotation tank (2), and the output end of the sewage pump (3) extends into the interior of the adjacent top flotation tank (2), a filter cage (4) is inserted into the upper opening of the bottom flotation tank (2), and a multi-porous air pipe (5) is horizontally inserted into the interior of the flotation tank (2), one end of the multi-porous air pipe (5) is a closed structure, and the other end of the multi-porous air pipe (5) extends out of the interior of the flotation tank (2).

2. The air flotation machine for industrial wastewater treatment according to claim 1, characterized in that: An electric water valve (6) is fixedly connected between the water inlet end of the sewage pump (3) and the outside of the adjacent flotation tank (2); a control panel (7) is provided outside the flotation tank (2); and a signal of the control panel (7) is connected to the sewage pump (3) and the electric water valve (6).

3. The air flotation machine for industrial wastewater treatment according to claim 2, characterized in that: It also includes two parallel baffles (8), the sides of the two baffles (8) close to each other are fixedly connected to the two sides of the air flotation tank (2), and the other side of one of the baffles (8) is fixedly connected to the back of the control panel (7).

4. The air flotation machine for industrial wastewater treatment according to claim 1, characterized in that: An air delivery pipe (9) is provided below the air flotation tank (2), and the interior of the air delivery pipe (9) is communicated with the interior of the porous air pipe (5).

5. The air flotation machine for industrial wastewater treatment according to claim 1, characterized in that: At least two hooks (10) are fixed on both sides of the filter cage (4), and the lower surfaces of the hooks (10) are placed on the upper edge of the lowest air flotation box (2).

6. The air flotation machine for industrial wastewater treatment according to claim 1, characterized in that: A drainage valve (11) is fixedly connected to the side of the uppermost flotation tank (2) away from the sewage pipe (1).

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