Integrated water purification equipment

Abstract

The invention provides integrated water purification equipment, an aerator arranged in an aerobic tank comprises a submersible electric pump, a mixing chamber, a first impeller, a second impeller, an air inlet branch pipe and an air inlet main pipe, the mixing chamber is arranged above the submersible electric pump, and a rotor shaft of the submersible electric pump extends into the mixing chamber and is sequentially connected with the second impeller and the first impeller in the mixing chamber; the first impeller is positioned at the top in the mixing chamber; a water inlet is formed in the top end of the mixing chamber; the air outlet end of the air inlet main pipe is positioned at the water inlet of the mixing chamber; one end of the air inlet branch pipe is communicated with the air inlet main pipe, and the other end is positioned in the mixing chamber. According to the integrated water purification equipment provided by the invention, the aeration rate and the oxygen dissolving efficiency are effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to an integrated water purification device. Background Art

[0002] As the sanitary requirements for rural residents' domestic water are getting higher and higher, integrated water purification equipment purifies surface water and groundwater. Aeration devices are one of the indispensable devices of integrated water purification equipment. However, the aeration devices in the prior art have the problem of poor aeration effect during use. The aeration effect and dissolved oxygen efficiency determine the performance of integrated water purification equipment. In the existing centrifugal aerator, the fluid enters the mixing chamber from the bottom, and the high-speed rotating impeller forms a negative pressure in the mixing chamber, so that the air on the water surface enters the mixing chamber and forms a soda-water mixture with the fluid body. The soda-water mixture is then ejected from the surrounding flow channel at high speed to oxygenate the surrounding water body. However, the existing submersible centrifugal aerator has the following limitations: 1. The amount of air entering the water body is limited, resulting in poor dissolved oxygen effect; 2. The movement path of the soda-water mixture is limited, resulting in poor oxygen transfer effect; 3. The water droplets and bubbles are large, resulting in poor dissolved oxygen effect. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an integrated water purification device to effectively improve the aeration volume and dissolved oxygen efficiency.

[0004] To solve the above technical problems, an embodiment of the present invention provides an integrated water purification device, including an aerator, wherein the aerator includes a submersible electric pump, a mixing chamber, a first impeller, a second impeller, an air intake branch pipe and an air intake main pipe, wherein the mixing chamber is arranged above the submersible electric pump, and the rotor shaft of the submersible electric pump extends into the mixing chamber and is sequentially connected to the second impeller and the first impeller in the mixing chamber; the first impeller is located at the top of the mixing chamber; a water inlet is provided at the top of the mixing chamber, and an air outlet end of the air intake main pipe is located at the water inlet of the mixing chamber; one end of the air intake branch pipe is connected to the air intake main pipe, and the other end is located in the mixing chamber.

[0005] As a further improvement of an embodiment of the present invention, the mixing chamber includes a main body and an upper cover plate, and the upper cover plate is arranged on the upper end opening of the main body; the upper cover plate is a frustum that is small at the top and large at the bottom, and the top of the upper cover plate forms a water inlet, the inner cavity of the upper cover plate is a first mixing chamber, and the first impeller is located in the first mixing chamber; the inner cavity of the main body is a second mixing chamber, and the second impeller is located in the second mixing chamber.

[0006] As a further improvement of the embodiment of the present invention, a third cutting body is provided on the inner wall of the upper cover plate.

[0007] As a further improvement to the embodiment of the present invention, both the first impeller and the second impeller are centrifugal impellers.

[0008] As a further improvement to the embodiment of the present invention, the diameter of the first impeller is 1 / 8 to 1 / 3 of the diameter of the second impeller.

[0009] As a further improvement of an embodiment of the present invention, the first impeller includes a first hub, first blades and a base plate, the first hub is connected to the rotor shaft of the submersible electric pump through a first axial hole arranged through the upper and lower ends thereof; the first blades are arranged circumferentially along the first hub; the base plate is arranged at the bottom end of the first hub and below the first blades; and a first cutting body is provided on the lower surface of the base plate.

[0010] As a further improvement of the embodiment of the present invention, the first cutting body includes a plurality of concentrically arranged first annular cutting grooves.

[0011] As a further improvement of an embodiment of the present invention, the second impeller includes a second hub, second blades and a top plate, the second hub is connected to the rotor shaft of the submersible electric pump through a second axial hole arranged through the upper and lower ends thereof; the second blades are arranged circumferentially along the second hub; the top plate is arranged at the top end of the second hub and above the second blades; and a second cutting body is provided on the upper surface of the top plate.

[0012] As a further improvement of the embodiment of the present invention, the second cutting body includes a plurality of concentrically arranged second annular cutting grooves.

[0013] As a further improvement of the embodiment of the present invention, the center of the first annular cutting groove is not located on the axis of the first hub, and the center of the second annular cutting groove is located on the axis of the second hub.

[0014] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: the present invention provides an integrated water purification device, an aerator arranged in a pool body, a water inlet is arranged at the top of the mixing chamber, the air outlet end of the air inlet main pipe is located at the water inlet, and the first impeller is located at the top of the mixing chamber. The fluid flows into the mixing chamber from the water inlet, the first impeller and the second impeller rotate in the mixing chamber, a negative pressure is formed in the mixing chamber, the air above the liquid surface enters the mixing chamber from the water inlet through the air inlet main pipe, and the air just entering the mixing chamber is mixed with the fluid under the action of the first impeller to form a pre-steam-water mixture. The pre-steam-water mixture serves as the power fluid of the second impeller in the mixing chamber, and is mixed again with the air input from the air inlet branch pipe to form a steam-water mixture, and a centrifugal aeration process is carried out. Thereby, the aeration volume and dissolved oxygen efficiency are effectively improved, the dissolved oxygen required for the water purification process is guaranteed, and the water purification effect is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 is a schematic structural diagram of an aerator in an integrated water purification device according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of a mixing chamber in an embodiment of the present invention; Figure 3 is a top view of a mixing chamber in an embodiment of the present invention; Figure 4 is a schematic structural diagram of a first impeller in an embodiment of the present invention; Figure 5 is a schematic structural diagram of a second impeller in an embodiment of the present invention; Figure 6 Schematic diagram of the mixing effect on one side of the mixing chamber in an embodiment of the present invention.

[0017] The figure includes: a submersible electric pump 1, a rotor shaft 11, a mixing chamber 2, a first mixing chamber 21, a second mixing chamber 22, a water inlet 23, an upper cover plate 24, a third cutting body 25, a bottom end plate 26, a mounting hole 27, a flow channel 28, a main body 29, a second impeller 3, a second cutting body 31, a top plate 32, a second blade 33, a second hub 34, a first impeller 4, a first cutting body 41, a bottom plate 42, a first blade 43, a first hub 44, an intake branch pipe 5, a second regulating valve 6, an intake main pipe 7, a first regulating valve 8, a first incident premixed liquid S1, a second incident premixed liquid S2, a first reflected premixed liquid S1', and a second reflected premixed liquid S2'. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is described in detail below with reference to the accompanying drawings.

[0019] The embodiment of the present invention provides an integrated water purification device, such as Figure 1As shown, the aerator arranged in the pool body includes a submersible electric pump 1, a mixing chamber 2, a first impeller 4, a second impeller 3, an air intake branch pipe 5 and an air intake main pipe 7. The submersible electric pump 1 is arranged on a base at the bottom of the pool, and the mixing chamber 2 is arranged above the submersible electric pump 1. The rotor shaft of the submersible electric pump 1 extends into the mixing chamber 2 and is connected to the second impeller 3 and the first impeller 4 in the mixing chamber 2. The first impeller 4 is located above the second impeller 3, and there is a certain distance between the first impeller and the second impeller 3. A water inlet 23 is provided at the top of the mixing chamber 2, and the first impeller is close to the water inlet 23. The air intake end of the air intake main pipe 7 is located above the liquid surface, and the air outlet end is located at the water inlet of the mixing chamber. One end of the air intake branch pipe 5 is connected to the air intake main pipe 7, and the other end is inserted into the mixing chamber 2 and is close to the second impeller 3. Among them, the first impeller 4 and the second impeller 3 are both centrifugal impellers.

[0020] In the aerator of the integrated water purification equipment of the above embodiment, the first impeller 4 and the second impeller 3 rotate at high speed, generating negative pressure in the mixing chamber 2, and the air above the water surface enters the mixing chamber through the air intake pipe 7, and is mixed with the water entering the mixing chamber from the water inlet under the action of the first impeller to form a pre-steam-water mixture. The pre-steam-water mixture is then used as the motive fluid of the second impeller, and is subjected to main aeration with the air entering the mixing chamber from the air intake branch pipe, thereby increasing the amount of air entering the mixing chamber. The air entering the mixing chamber from the air intake branch pipe is cut and mixed with the pre-steam-water mixture, so that the water droplets and bubbles become smaller and denser, allowing more oxygen to dissolve in the water. The steam-water mixture in the mixing chamber flows out from the flow channel under the action of the second impeller, and oxygenates the water in all directions.

[0021] In the integrated water purification equipment of this embodiment, the external water enters the mixing chamber from the water inlet at the top of the mixing chamber, and is pre-mixed with the air entering the mixing chamber under the action of the first impeller. The pre-mixed pre-steam-water mixture containing a certain amount of air is used as a new medium, and then a centrifugal aeration process is performed under the action of the second impeller, thereby increasing the amount of air entering the mixing chamber and effectively increasing the aeration amount. The air entering the mixing chamber from the air inlet branch pipe is cut and mixed with the pre-steam-water mixture, making the water droplets and bubbles smaller and denser, so that more oxygen is dissolved in the water, effectively improving the dissolved oxygen efficiency.

[0022] Preferably, a second regulating valve 6 is provided on the air inlet branch pipe 5, and a first regulating valve 8 is provided between the connection between the air inlet main pipe 7 and the air inlet branch pipe 5 and the air outlet. The first regulating valve 8 is used to adjust the amount of air entering the mixing chamber 2 through the air inlet main pipe 7, thereby determining the optimal aeration amount formed by the first impeller. The second regulating valve 6 is used to adjust the amount of air entering the mixing chamber 2 through the air inlet branch pipe, thereby determining the rated aeration amount of the entire aerator.

[0023] As a preferred example, Figure 2 and Figure 3As shown, the mixing chamber 2 includes a body 29 and an upper cover plate 24. The body 29 is cylindrical, with an upper end open and a lower end closed, and a flow channel 28 is provided in the circumferential direction. A mounting hole 27 for the rotor shaft of the submersible electric pump to pass through is provided on the bottom end plate 26 of the body. The upper cover plate 24 is arranged on the upper end opening of the body 29. The upper cover plate is a truncated cone with a small top and a large bottom, and a water inlet 23 is formed at the top of the upper cover plate. The inner cavity of the upper cover plate is a first mixing chamber 21, and the first impeller 4 is located in the first mixing chamber 21. The inner cavity of the body 29 is a second mixing chamber 22, and the second impeller 3 is located in the second mixing chamber 22. Preferably, the diameter of the first impeller 4 is 1 / 8 to 1 / 3 of the diameter of the second impeller 3. Preferably, the inner wall of the upper cover plate 24 is provided with a third cutting body 25. The third cutting body 25 includes a plurality of third annular cutting grooves arranged at intervals from top to bottom.

[0024] In this preferred embodiment, the first impeller 4 rotates at high speed, generating negative pressure in the first mixing chamber 21, and the air above the water surface enters the first mixing chamber through the air intake pipe 7, and mixes with the water in the first mixing chamber to form a pre-steam-water mixture. The pre-steam-water mixture is then used as the power fluid of the second impeller, and the second impeller 3 rotates at high speed, generating negative pressure in the second mixing chamber, and the air above the water surface enters the second mixing chamber through the air intake branch pipe 5, and forms a steam-water mixture with the pre-steam-water mixture in the mixing chamber. The first impeller 4 serves as the auxiliary impeller of the aerator, and the second impeller 3 is the main impeller of the aerator. The steam-water mixture formed by the first impeller in the first mixing chamber serves as the power fluid of the second impeller in the second mixing chamber to increase the aeration amount.

[0025] Since the diameter of the upper cover plate 24 gradually increases from top to bottom, the pre-steam-water mixture is incident on the inner wall of the upper cover plate 24 under the action of the first impeller 4, and the third cutting body 25 cuts the pre-steam-water mixture into smaller and denser parts, so that more oxygen in the pre-steam-water mixture is dissolved in the water. At the same time, after the pre-steam-water mixture is cut, it moves downward and outward after being reflected by the upper cover plate, and collides, cuts, and mixes with the pre-steam-water mixture below that has not yet been incident on the inner wall of the upper cover plate, so that the water droplets and bubbles become smaller and denser, allowing more oxygen to dissolve in the water. The reflected pre-steam-water mixture above drives the part of the incident pre-steam-water mixture below to move downward and outward, and the pre-steam-water mixture below that has not yet been incident on the inner wall of the upper cover plate continues to flow toward the inner wall of the upper cover plate with part of the reflected mixture above, and moves downward and outward after being reflected by the upper cover plate. Figure 6As shown, the first incident pre-steam-water mixture S1 above is cut by the third cutting body 25 to form a first reflected pre-steam-water mixture S1', and the first reflected pre-steam-water mixture moves downward and outward, collides, cuts and mixes with the second incident pre-steam-water mixture S2 below, and cuts the water droplets and bubbles into smaller and denser ones. Then, the first reflected pre-steam-water mixture S1' will continue to move downward and outward with part of the second incident pre-steam-water mixture S2, and the second incident pre-steam-water mixture S2 will carry part of the first reflected pre-steam-water mixture S1' and be cut by the third cutting body again, and cut the water droplets and bubbles into smaller and denser ones to form a second reflected pre-steam-water mixture S2', thereby continuously forming a third reflected pre-steam-water mixture and a fourth reflected pre-steam-water mixture... that flow downward and outward.

[0026] As a preferred example, Figure 4 As shown, the first impeller 4 includes a first hub 44, first blades 43 and a bottom plate 42. The first hub 44 is connected to the rotor shaft of the submersible electric pump through a first axial hole provided through the upper and lower ends thereof. The first blades 43 are arranged circumferentially along the first hub 44. The bottom plate 42 is arranged at the bottom end of the first hub 44 and below the first blades 43. A first cutting body 41 is provided on the lower surface of the bottom plate 42. Preferably, the first cutting body 41 includes a plurality of concentrically arranged first annular cutting grooves.

[0027] like Figure 5 As shown, the second impeller 3 includes a second hub 34, second blades 33 and a top plate 32. The second hub 34 is connected to the rotor shaft of the submersible electric pump through a second axial hole provided through the upper and lower ends thereof. The second blades 33 are arranged circumferentially along the second hub 34. The top plate 32 is arranged at the top end of the second hub 34 and above the second blades 33. A second cutting body 31 is provided on the upper surface of the top plate 32. Preferably, the second cutting body 31 includes a plurality of concentrically arranged second annular cutting grooves.

[0028] In this preferred embodiment, both the facing end surfaces of the first impeller 4 and the second impeller 3 are provided with cutting bodies to cut the soda-water mixture entering between the two impellers. The first cutting body cuts above the soda-water mixture, cutting the water droplets and bubbles into smaller and denser ones. During the outward flow of the soda-water mixture, the soda-water mixture is constantly squeezed and moves downward, increasing the dissolved oxygen content of the water body below; the second cutting body cuts below the soda-water mixture, cutting the water droplets and bubbles into smaller and denser ones. During the outward flow of the soda-water mixture, the soda-water mixture is constantly squeezed and moves upward, increasing the dissolved oxygen content of the water body above, thereby improving the dissolved oxygen efficiency. The soda-water mixture squeezed downward and the soda-water mixture squeezed upward are mixed again, so that more oxygen is dissolved in the water. The soda-water mixture between the two impellers flows outward to the top of the second impeller, and the second cutting body at the top of the second impeller cuts below the soda-water mixture again, further making the water droplets and bubbles smaller and denser. The soda-water mixture is mixed again with the air entering the mixing chamber, transferring more oxygen into the water to improve the dissolved oxygen efficiency.

[0029] Preferably, the center of the first annular cutting groove is not located on the axis of the first hub 44 , and the center of the second annular cutting groove is located on the axis of the second hub 34 .

[0030] In the above preferred embodiment, the first cutting body 41 of the eccentric structure and the second cutting body 31 of the concentric structure cut the soda-water mixture between the two impellers. The first cutting body cuts above the soda-water mixture, and the second cutting body cuts below the soda-water mixture, cutting the water droplets and bubbles into smaller and denser ones to improve the dissolved oxygen efficiency. The first cutting groove and the second cutting groove, which are not concentric up and down, cut the soda-water mixture between the two impellers, which has the following advantages: First, the soda-water mixture between the two impellers is cut by two eccentric cutting grooves. The first cutting groove cuts above the soda-water mixture, cutting the water droplets and bubbles into smaller and denser ones. During the outward flow of the soda-water mixture, the water droplets and bubbles are constantly squeezed and moved downward, increasing the dissolved oxygen content of the water body below; the second cutting groove cuts below the soda-water mixture, cutting the water droplets and bubbles into smaller and denser ones. During the outward flow of the soda-water mixture, the water droplets and bubbles are constantly squeezed and moved upward, increasing the dissolved oxygen content of the water body above; the two eccentric downward and upward soda-water mixtures merge into each other, while constantly changing the circumferential and radial positions of the soda-water mixture, so that the soda-water mixture between the two impellers is mixed and distributed again, transferring more oxygen to the water to improve the dissolved oxygen efficiency.

[0031] Second, since the center of the first cutting body 41 is not on the axis of the first impeller, the smaller and denser soda-water mixture produced by the first cutting body is distributed at different radial positions in the circumferential direction, and the radial position of the cut soda-water mixture is continuously changed. While changing the radial position, the flow of the soda-water mixture is strengthened, and the soda-water mixture with a lower oxygen content is continuously cut again, so that more water droplets and bubbles are cut into smaller and denser ones, and more oxygen is transferred to the water.

[0032] Third, because the two cutting bodies are not concentric, the first cutting body 41 at the bottom of the first impeller forms a non-concentric smaller and more dense soda-water mixture when cutting the soda-water mixture, and the second cutting body 31 at the top of the second impeller forms a concentric smaller and more dense soda-water mixture when cutting the soda-water mixture. When the two streams of soda-water mixture flow outward, they continuously interact and cut each other, and the oxygen transfer process is performed again, and new soda-water mixtures with slightly different oxygen contents are continuously formed in the surrounding directions, so that the oxygen in the new soda-water mixture is redistributed and flows, increasing the oxygen movement path and continuously changing the flow direction, so as to improve the oxygen transfer efficiency.

[0033] Fourthly, since the diameter of the first impeller 4 is smaller than that of the second impeller 3, when the first cutting body throws the cut soda-water mixture outward, an asymmetric soda-water mixture is formed in different circumferential and radial directions, creating conditions for the re-transfer of oxygen. The second cutting body 31 beyond the diameter of the first impeller cuts the asymmetric soda-water mixture above the second impeller, thereby improving the cutting effect in different directions, cutting the water droplets and bubbles below the soda-water mixture into smaller and denser ones, transferring more oxygen into the water, and further improving the oxygen transfer rate.

[0034] The working process of the integrated water purification device in the above embodiment is as follows: The first impeller 4 rotates at high speed, generating negative pressure in the first mixing chamber 21, and the air above the water surface enters the first mixing chamber through the air intake pipe 7, and mixes with the water in the first mixing chamber to form a pre-steam-water mixture, which is then used as the power fluid of the second impeller for aeration.

[0035] The high-speed rotating pre-steam-water mixture acts on the inner wall of the upper cover plate 24, and the first incident pre-steam-water mixture S1 above is cut by the third cutting body 25 to form a first reflected pre-steam-water mixture S1', and the first reflected pre-steam-water mixture moves downward and outward, collides, cuts and mixes with the second incident pre-steam-water mixture S2 below, and cuts the water droplets and bubbles into smaller and denser ones. Then, the first reflected pre-steam-water mixture S1' will continue to move downward and outward with part of the second incident pre-steam-water mixture S2, and the second incident pre-steam-water mixture S2 will carry part of the first reflected pre-steam-water mixture S1' and be cut by the third cutting body again, and cut the water droplets and bubbles into smaller and denser ones to form a second reflected pre-steam-water mixture S2', thereby continuously forming a third reflected pre-steam-water mixture and a fourth reflected pre-steam-water mixture flowing downward and outward.

[0036] The second impeller 3 rotates at high speed, generating negative pressure in the second mixing chamber, and the air above the water surface enters the second mixing chamber through the air intake branch pipe 5, and forms a steam-water mixture with the pre-steam-water mixture in the mixing chamber. The air entering the mixing chamber from the air intake branch pipe is cut and mixed with the pre-steam-water mixture, making the water droplets and bubbles smaller and denser, so that more oxygen is dissolved in the water, thereby improving the oxygen transfer efficiency.

[0037] The first cutting body 41 of the eccentric structure and the second cutting body 31 of the concentric structure cut the soda-water mixture between the two impellers. The first cutting body cuts above the soda-water mixture. While the soda-water mixture flows outward, it continuously moves downward to increase the dissolved oxygen content of the water body below. The second cutting body cuts below the soda-water mixture, cutting the water droplets and bubbles into smaller and denser ones. While the soda-water mixture flows outward, it continuously moves upward to increase the dissolved oxygen content of the water body above, so as to improve the dissolved oxygen efficiency. The two eccentric downward and upward soda-water mixtures merge into each other, and at the same time, the positions of the circumferential and radial soda-water mixtures are continuously changed, so that the soda-water mixture between the two cover plates is mixed and distributed again, and more is transferred to the water to improve the dissolved oxygen efficiency.

[0038] The smaller and denser soda-water mixture produced by the first cutting body is distributed differently at different radial positions in the circumferential direction, and the radial position of the cut soda-water mixture is continuously changed. While changing the radial position, the flow of the soda-water mixture is strengthened, and the soda-water mixture with a lower oxygen content is continuously cut again, cutting more water droplets and bubbles into smaller and denser ones, so that more oxygen is transferred to the water.

[0039] When the first cutting body 41 cuts the soda-water mixture, a smaller and more dense soda-water mixture with different centers is formed. When the second cutting body 31 cuts the soda-water mixture, a smaller and more dense soda-water mixture with different centers is formed. When the two streams of the soda-water mixture flow outward, they continuously interact and cut each other, and the oxygen transfer process is performed again. New soda-water mixtures with slightly different oxygen contents are continuously formed in the surrounding directions, so that the oxygen in the new soda-water mixture is redistributed and flows, the oxygen movement path is increased, and the flow direction is continuously changed, so as to improve the oxygen transfer efficiency.

[0040] When the first cutting body 41 throws the soda-water mixture outward under the action of centrifugal force, an asymmetric soda-water mixture is formed in different circumferential directions and different radial directions, creating conditions for the re-transfer of oxygen. The second cutting body 31 exceeding the diameter of the first impeller cuts the asymmetric soda-water mixture above the second impeller, thereby improving the cutting effect in different directions, cutting the water droplets and bubbles below the soda-water mixture into smaller and denser ones, transferring more oxygen into the water, and further improving the oxygen transfer rate.

[0041] The soda-water mixture after multiple cuttings flows out from the flow channel 28 of the mixing chamber under the action of the second impeller rotating at a high speed, and oxygenates the surrounding water.

[0042] By continuously adjusting the first regulating valve 8 and the second regulating valve 6 on the air inlet device and using a flow meter to measure the aeration volume, the optimal aeration volume formed by the first impeller and the rated aeration volume of the aerator are determined.

[0043] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An integrated water purification device, characterized in that: The invention comprises an aerator, wherein the aerator comprises a submersible electric pump (1), a mixing chamber (2), a first impeller (4), a second impeller (3), an air intake branch pipe (5) and an air intake main pipe (7). The mixing chamber (2) is arranged above the submersible electric pump (1), and the rotor shaft of the submersible electric pump (1) extends into the mixing chamber (2) and is sequentially connected to the second impeller (3) and the first impeller (4) in the mixing chamber (2); the first impeller (4) is located at the top of the mixing chamber (2); a water inlet (23) is provided at the top of the mixing chamber (2), and an air outlet end of the air intake main pipe (7) is located at the water inlet of the mixing chamber; one end of the air intake branch pipe (5) is connected to the air intake main pipe (7), and the other end is located in the mixing chamber (2).

2. The integrated water purification device according to claim 1, characterized in that: The mixing chamber (2) comprises a body (29) and an upper cover plate (24), wherein the upper cover plate (24) is arranged on the upper end opening of the body (29); the upper cover plate is in the shape of a truncated cone with a smaller top and a larger bottom, and a water inlet (23) is formed at the top end of the upper cover plate; the inner cavity of the upper cover plate is a first mixing chamber (21), and the first impeller (4) is located in the first mixing chamber (21); the inner cavity of the body (29) is a second mixing chamber (22), and the second impeller (3) is located in the second mixing chamber (22).

3. The integrated water purification device according to claim 2, characterized in that: The inner wall of the upper cover plate (24) is provided with a third cutting body (25).

4. The integrated water purification device according to claim 1, characterized in that: The first impeller (4) and the second impeller (3) are both centrifugal impellers.

5. The integrated water purification device according to claim 1, characterized in that: The diameter of the first impeller (4) is 1 / 8 to 1 / 3 of the diameter of the second impeller (3).

6. The integrated water purification device according to claim 1, characterized in that: The first impeller (4) comprises a first hub (44), first blades (43) and a bottom plate (42); the first hub (44) is connected to the rotor shaft of the submersible electric pump via a first axial hole provided through the upper and lower ends thereof; the first blades (43) are provided along the circumference of the first hub (44); the bottom plate (42) is provided at the bottom end of the first hub (44) and below the first blades (43); and a first cutting body (41) is provided on the lower surface of the bottom plate (42).

7. The integrated water purification device according to claim 6, characterized in that: The first cutting body (41) comprises a plurality of concentrically arranged first annular cutting grooves.

8. The integrated water purification device according to claim 7, characterized in that: The second impeller (3) comprises a second hub (34), second blades (33) and a top plate (32); the second hub (34) is connected to the rotor shaft of the submersible electric pump via a second axial hole provided through the upper and lower ends thereof; the second blades (33) are arranged along the circumference of the second hub (34); the top plate (32) is arranged at the top end of the second hub (34) and is located above the second blades (33); and a second cutting body (31) is provided on the upper surface of the top plate (32).

9. The integrated water purification device according to claim 8, characterized in that: The second cutting body (31) comprises a plurality of concentrically arranged second annular cutting grooves.

10. The integrated water purification device according to claim 9, characterized in that: The center of the first annular cutting groove is not located on the axis of the first wheel hub (44), and the center of the second annular cutting groove is located on the axis of the second wheel hub (34).

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