A three-stage dissolved air device for micro-nano flotation

Abstract

The present invention discloses a three-stage dissolved gas device of micro-nano flotation, belonging to the technical field of environmental water treatment. The present invention comprises a tank body, a diversion mixing water inlet pipe is arranged inside the tank body, the diversion mixing water inlet pipe is divided into two sections and arranged inside and outside the tank body respectively, and a plurality of vertical water distribution pipes are arranged at the end of the diversion mixing water inlet pipe inside the tank body. The present invention is provided with a plurality of vertical water distribution pipes at the end of the diversion mixing water inlet pipe inside the tank body, air holes are arranged at the top of the branch pipe, a plurality of transverse slits are arranged on the side wall, and the projection has a certain angle. The liquid forms a water curtain through the transverse slit to fully contact the upper gas layer of the tank body, the gas-liquid interface is updated frequently, and the gas dissolution is accelerated; an air inlet is arranged on the diversion mixing water inlet pipe placed outside the tank body, the gas is initially mixed and dissolved in the diversion mixing water inlet pipe, and the excess gas is discharged into the gas layer in the pipe from the air holes at the top of the vertical water distribution pipe. Through the three-stage dissolved gas setting and the water curtain water distribution method, the dissolved gas efficiency can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection water treatment, and more specifically to a three-stage air dissolving device of micro-nano air flotation. Background Art

[0002] As the core component of the traditional flotation process, the dissolved air system determines the sewage treatment capacity and energy consumption through its dissolved air efficiency. The main factors affecting the dissolved air efficiency are: dissolved air pressure, water temperature, mixing and other aspects. The dissolution of air in water is a liquid film control process, which causes the liquid phase to undergo violent movements such as convergence, dispersion, turning, and tearing, causing the liquid film to be turbulent, accelerating the surface renewal rate and reducing the resistance of the liquid film, thus accelerating the mass transfer efficiency. The dissolved air efficiency of existing dissolved air equipment is generally low, and the dissolved air effect is poor. Adding fillers to improve the dissolved air efficiency can easily cause system blockage, making it difficult to achieve the expected dissolved air water volume. At the same time, energy consumption increases and maintenance is more cumbersome. Summary of the invention

[0003] 1. Technical problem to be solved by the invention

[0004] In view of the defects and shortcomings of the prior art, the present invention provides a three-stage gas dissolving device of micro-nano flotation. The present invention provides a plurality of vertical water distribution pipes at the end of the diversion and mixing water inlet pipe inside the tank body, air holes are provided on the top of the branch pipe, and a plurality of transverse slits are provided on the side wall. The projection has a certain angle. The liquid forms a water curtain through the transverse slit and fully contacts the upper gas layer of the tank body. The gas-liquid interface is updated frequently, which accelerates the gas dissolution. The three-stage gas dissolving setting and the water curtain water distribution method can effectively improve the gas dissolving efficiency.

[0005] 2. Technical solution

[0006] In order to achieve the above object, the technical solution provided by the present invention is:

[0007] The invention discloses a three-stage dissolved air device for micro-nano flotation, comprising a tank body provided with a diversion mixing water inlet pipe, wherein the diversion mixing water inlet pipe is divided into two sections and is respectively arranged inside and outside the tank body, and a plurality of vertical water distribution pipes are arranged at the end of the diversion mixing water inlet pipe inside the tank body.

[0008] Furthermore, the length of the diversion mixing water inlet pipe is consistent with that of the tank body, 1 / 5 of the length of the diversion mixing water inlet pipe is arranged outside the tank body, the diversion mixing water inlet pipe outside the tank body is provided with an air inlet, flange end covers are arranged on both sides of the tank body, and a dissolved air outlet is arranged at the lower right end of the tank body.

[0009] Furthermore, the vertical water distribution pipe is vertically arranged upward on the outside of the diversion mixing water inlet pipe, and the first one from the end is the first vertical water distribution branch pipe.

[0010] Furthermore, a support plate is provided at the end of the diversion mixing water inlet pipe in the tank body.

[0011] Furthermore, the vertical water distribution pipe is vertically installed with the diversion mixing water inlet pipe, a vent is provided on the top of the vertical water distribution pipe, and a plurality of transverse slits are provided in the vertical direction of the side wall of the vertical water distribution pipe, and the projection of each transverse slit is 180°.

[0012] Furthermore, a semicircular upper baffle is arranged inside the tank body.

[0013] Furthermore, the semicircular upper baffle is arranged on the left side of the tank body, and the distance from the flange is 2 / 5 of the length of the tank body.

[0014] Furthermore, a second air inlet is provided at the lower left end of the tank body, and a U-shaped perforated air pipe is provided in matching manner for the second air inlet. The U-shaped perforated air pipe and the dissolved air outlet are symmetrically arranged on the outside of the tank body.

[0015] Furthermore, the first vertical water distribution branch pipe is located in the middle of the semicircular upper baffle and the end flange.

[0016] Furthermore, the tank body may be provided with a pressure gauge, a safety valve, and a float controller for auxiliary operation.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0019] The present invention provides a plurality of vertical water distribution pipes at the end of the diversion mixing water inlet pipe inside the tank body, and air holes are provided on the top of the branch pipe, and a plurality of transverse slits are provided on the side wall, and the projection has a certain angle. The liquid forms a water curtain through the transverse slit to fully contact the upper gas layer of the tank body, and the gas-liquid interface is updated frequently, which accelerates the dissolution of the gas; the diversion mixing water inlet pipe placed outside the tank body is provided with an air inlet, and the gas is initially mixed and dissolved in the diversion mixing water inlet pipe, and the excess gas is discharged into the gas layer in the pipe through the air holes at the top of the vertical water distribution pipe, and the lower left part of the tank body is provided with a gas distribution pipe, and a dissolved gas outlet is provided at a symmetrical position, which effectively avoids short flow. Through the three-stage dissolved gas setting and the water curtain water distribution method, the dissolved gas efficiency can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present invention.

[0021] In the figure: 1. tank body; 2. diversion mixing water inlet pipe; 3. vertical water distribution pipe; 4. first air inlet; 5. U-shaped perforated air distribution pipe; 6. semicircular upper baffle; 7. support plate; 8. dissolved air outlet; 9. flange end cover. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0023] Example 1

[0024] from Figure 1 It can be seen that the three-stage dissolved air device of a micro-nano flotation of the present embodiment comprises a tank body 1, a guide mixing water inlet pipe 2 is arranged inside the tank body 1, the guide mixing water inlet pipe 2 is divided into two sections and is arranged inside and outside the tank body 1 respectively, a plurality of vertical water distribution pipes 3 are arranged at the end of the guide mixing water inlet pipe 2 inside the tank body 1, an air distribution pipe 5 is arranged at the lower left part of the tank body 1, and a dissolved air outlet 8 is arranged at the lower right part, a semicircular upper baffle 6 and a support plate 7 are arranged inside the tank body 1, and the support plate 7 is used to support the vertical water distribution pipe 3.

[0025] The first vertical water distribution branch pipe is located in the middle of the semicircular upper baffle 6 and the end flange. The semicircular upper baffle 6 can effectively control the water distribution range and prevent short-circuiting. The first air inlet 4 is connected to the water inlet pipe to allow the gas to be fully mixed and dissolved in the pipe. The vertical water distribution pipe 3 is provided with a water distribution seam, which is divided into several layers at a certain angle to each other. The raw water passes through the gap to form a water curtain, which is in full contact with the gas layer in the tank, thereby improving the gas dissolution efficiency.

[0026] A support plate 7 is provided at the end of the diversion mixing water inlet pipe 2 in the tank body 1. The support plate 7 is welded to the tank body 1 so that the tank body 1 and the diversion mixing water inlet pipe 2 do not need to be welded. The diversion mixing water inlet pipe 2 can be disassembled as a whole through the flange.

[0027] The length of the diversion mixing water inlet pipe 2 is consistent with that of the tank body 1. 1 / 5 of the length of the diversion mixing water inlet pipe 2 is arranged outside the tank body 1. The diversion mixing water inlet pipe 2 outside the tank body 1 is provided with an air inlet 4. Flange end covers 9 are arranged on both sides of the tank body 1. Both ends of the tank body 1 are connected and sealed by flanges. A dissolved gas outlet 8 is arranged at the lower right end of the tank body 1. The outlet pipe diameter is one level larger than the diversion mixing water inlet pipe 2, which can prevent the outlet pipe loss from increasing, and the gas is released and gathered in the outlet pipe to form large bubbles.

[0028] The gas is initially dissolved through the water pipe at the air inlet 4, and the longer diversion and mixing water inlet pipe 2 ensures that the gas and water have sufficient dissolution time while avoiding the occurrence of short-flow.

[0029] The vertical water distribution pipe 3 is arranged vertically upward on the inner side of the diversion mixing water inlet pipe 2. The first one from the end is the first vertical water distribution branch pipe. One or more vertical water distribution pipes 3 can be set. The vertical water distribution pipe 3 is vertically installed with the diversion mixing water inlet pipe 2. A vent is provided on the top, and a number of transverse slits are provided in the vertical direction of the side wall, and each transverse slit is projected at 180°.

[0030] Through the above structure, excess undissolved gas can be discharged into the internal air layer of the tank body 1 through the air holes on the top of the vertical water distribution pipe 3. A semicircular upper baffle 6 is arranged inside the tank body 1. The arrangement of the semicircular upper baffle 6 ensures that there is sufficient air layer in the first vertical branch pipe section. The initially dissolved water forms a water curtain through the transverse seam and enters the air layer for secondary water distribution and gas dissolution, thereby further improving the gas dissolution effect.

[0031] The semicircular upper baffle 6 is arranged on the left side of the tank body 1, and the distance from the flange is 2 / 5 of the tank body length.

[0032] A second air inlet is provided at the lower left end of the tank body 1, and a plurality of air distribution holes are provided at the second air inlet, which effectively increases the air-water contact area and improves the dissolved gas efficiency. The second air inlet is equipped with a U-shaped perforated air distribution pipe 5. The U-shaped perforated air distribution pipe 5 and the dissolved gas outlet 8 are symmetrically arranged on the outside of the tank body 1. The relative position of the dissolved gas outlet 8 and the diversion mixing water inlet pipe 2 can avoid short flow. At the same time, the pipe diameter is one level larger than the water inlet to prevent the increase of the outlet pipe loss. The gas is released and gathered in the outlet pipe to form large bubbles. The U-shaped perforated air distribution pipe 5 is located in the lower section of the horizontal center of the semicircular upper baffle 6.

[0033] Through the above structure, high-pressure gas passes through the pores to form tiny bubbles, which are fully contacted with the internal solution from bottom to top and dissolved to form a third-level dissolved gas structure.

[0034] The tank body 1 may be provided with auxiliary components such as a pressure gauge, a safety valve, a float controller, etc. for auxiliary operation.

[0035] The present invention provides a plurality of vertical water distribution pipes 3 at the end of the diversion mixing water inlet pipe 2 inside the tank body 1, and air holes are provided on the top of the branch pipe, and a plurality of transverse slits are provided on the side wall, and the projection has a certain angle. The liquid forms a water curtain through the transverse slit and fully contacts the upper air layer of the tank body 1, and the gas-liquid interface is updated frequently, which accelerates the dissolution of the gas; an air inlet 4 is provided on the diversion mixing water inlet pipe 2 placed outside the tank body 1, and the gas is initially mixed and dissolved in the diversion mixing water inlet pipe 2, and the excess gas is discharged into the air layer in the pipe through the air holes at the top of the vertical water distribution pipe 3; an air distribution pipe 5 is provided on the lower left part of the tank body 1, and dissolved air outlets 8 are provided at symmetrical positions. Through the three-stage dissolved air setting and the water curtain water distribution method, the dissolved air efficiency can be effectively improved.

[0036] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A three-stage air dissolving device for micro-nano air flotation, comprising a tank body (1), wherein a diversion mixing water inlet pipe (2) is arranged inside the tank body (1), and the characteristics are: The diversion mixing water inlet pipe (2) is divided into two sections and is respectively arranged inside and outside the tank body (1). A plurality of vertical water distribution pipes (3) are arranged at the end of the diversion mixing water inlet pipe (2) inside the tank body (1). A dissolved gas outlet (8) is arranged at the lower right end of the tank body (1). The vertical water distribution pipe (3) is vertically installed with the diversion mixing water inlet pipe (2). A vent is arranged at the top of the vertical water distribution pipe (3). A plurality of transverse slits are arranged in the vertical direction of the side wall of the vertical water distribution pipe (3), and the projection of each transverse slit is 180°. The diversion mixing water inlet pipe (2) has a length consistent with that of the tank body (1), 1 / 5 of the length of the diversion mixing water inlet pipe (2) is arranged outside the tank body (1), the diversion mixing water inlet pipe (2) outside the tank body (1) is provided with a first air inlet (4), and flange end covers (9) are arranged on both sides of the tank body (1); A U-shaped perforated air distribution pipe (5) is arranged at the lower left end of the tank body (1), and the U-shaped perforated air distribution pipe (5) and the dissolved air outlet (8) are symmetrically arranged on the outer side of the tank body (1).

2. A three-stage dissolved air device for micro-nano flotation according to claim 1, characterized in that: The vertical water distribution pipe (3) is arranged vertically upward on the outside of the diversion mixing water inlet pipe (2), and the first one from the end is a first vertical water distribution branch pipe.

3. A three-stage air dissolving device for micro-nano air flotation according to claim 1, characterized in that: A support plate (7) is provided at the end of the diversion and mixing water inlet pipe (2) in the tank body (1).

4. A three-stage air dissolving device for micro-nano air flotation according to claim 1, characterized in that: A semicircular upper baffle (6) is arranged inside the tank body (1).

5. A three-stage air dissolving device for micro-nano air flotation according to claim 4, characterized in that: The semicircular upper baffle (6) is arranged on the left side of the tank body (1) and is 2 / 5 of the tank body length away from the flange.

6. A three-stage air dissolving device for micro-nano air flotation according to claim 4, characterized in that: The first vertical water distribution branch pipe is located in the middle of the semicircular upper baffle (6) and the end flange.

7. A three-stage air dissolving device for micro-nano air flotation according to claim 1, characterized in that: The tank body (1) may be provided with a pressure gauge, a safety valve and a float controller for auxiliary operation.

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