Sewage treatment device and self-cleaning method of suspended ball filler thereof

Abstract

The application relates to the technical field of sewage treatment, in particular to a sewage treatment device and a self-cleaning method of suspended ball fillers of the sewage treatment device. The sewage treatment device comprises a reaction tank, the reaction tank is internally provided with suspended ball fillers for adsorbing impurities in sewage; an air blowing assembly, the air blowing assembly comprises an air blower, an air blowing vertical pipe and an air blowing horizontal pipe, one end of the air blowing vertical pipe is connected with the air blower, the other end of the air blowing vertical pipe is vertically connected with the air blowing horizontal pipe, the air blowing horizontal pipe is located at the bottom of the reaction tank and is parallel to the bottom of the reaction tank, one end of the air blowing horizontal pipe, which is away from the air blowing vertical pipe, is provided with an air outlet, the air blowing horizontal pipe is movably connected with the air blowing vertical pipe, and the air blowing horizontal pipe can rotate around the air blowing vertical pipe as a rotating shaft; and a pumping assembly, the pumping assembly comprises a pumping pump and a pumping pipe, the pumping pump is connected with the pumping pipe, the pumping pipe extends into the reaction tank, and a pumping head of the pumping pipe is located at the bottom of the reaction tank.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, in particular to a sewage treatment device and a self-cleaning method of suspended ball fillers thereof. BACKGROUND

[0002] In the treatment of domestic sewage and industrial sewage, the fillers play a crucial role in water treatment. The existing form of fillers in the reaction tank of sewage treatment mainly includes suspended type and suspended type, and the suspended ball filler is mainly used in suspended type.

[0003] However, the suspended ball filler has some problems in the sewage treatment process: first, the suspended ball filler is prone to floating with the water flow and air flow to one side of the reaction tank or sinking to the bottom of the tank during the sewage treatment process, which is not conducive to the treatment effect of the suspended ball filler on the sewage; second, the suspended ball filler needs to be taken out from the reaction tank for cleaning and reuse, which increases the workload of the filler cleaning. SUMMARY

[0004] In order to improve the sewage treatment effect of the suspended ball filler, the present application provides a sewage treatment device and a self-cleaning method of suspended ball fillers thereof.

[0005] The sewage treatment device and the self-cleaning method of suspended ball fillers thereof provided by the present application adopt the following technical scheme:

[0006] A sewage treatment device comprises:

[0007] A reaction tank is provided with suspended ball fillers for adsorbing impurities in sewage.

[0008] An air blowing assembly comprises an air blower, an air blowing vertical pipe and an air blowing horizontal pipe. One end of the air blowing vertical pipe is connected to the air blower, and the other end is connected to the air blowing horizontal pipe vertically. The air blowing horizontal pipe is located at the bottom of the reaction tank and is parallel to the bottom of the reaction tank. One end of the air blowing horizontal pipe away from the air blowing vertical pipe is provided with an air outlet. The air blowing horizontal pipe is movably connected to the air blowing vertical pipe, and can rotate around the air blowing vertical pipe as the rotation shaft.

[0009] An extraction assembly comprises an extraction pump and an extraction pipe. The extraction pump is connected to the extraction pipe. The extraction pipe extends into the reaction tank, and the extraction head of the extraction pipe is located at the bottom of the reaction tank.

[0010] By adopting the technical scheme, the air blowing horizontal pipe of the air blowing assembly of the sewage treatment device is arranged to rotate around the air blowing vertical pipe as a rotating shaft; when the sewage treatment device is used to treat sewage, the mechanical stirring effect of the rotating air blowing horizontal pipe and the rotating movement of the air outlet in the circumferential direction are used to improve the uniformity and activity of the suspended ball filler in the whole reaction tank, thereby improving the treatment effect of the suspended ball filler on the sewage; when the sewage treatment device is used to clean the filler, the mechanical stirring effect of the rotating air blowing horizontal pipe and the air blowing effect of the air blowing horizontal pipe are used to separate the impurities from the suspended ball filler, and the separated impurities are extracted through the extraction pipe, thereby realizing the self-cleaning of the suspended ball filler.

[0011] Optionally, the air blowing horizontal pipe is a telescopic air blowing pipe; and / or the air blowing vertical pipe is a telescopic air blowing pipe, and the air blowing vertical pipe can drive the air blowing horizontal pipe to move back and forth in a direction perpendicular to the bottom of the reaction tank.

[0012] By adopting the technical scheme, the position of the air outlet of the air blowing horizontal pipe can be moved in the axial direction and the meridian direction of the air blowing horizontal pipe, thereby realizing the uniform air blowing of the air blowing horizontal pipe in the axial range and the depth direction of the reaction tank, further improving the uniformity of the suspended ball filler in the whole reaction tank, and improving the treatment effect of the suspended ball filler on the sewage.

[0013] Optionally, the air blowing assembly further comprises a heating pipeline arranged between the air outlet of the air blower and the air blowing vertical pipe, and used to heat the air flow blown by the air blower.

[0014] By adopting the technical scheme, the drying and separation of the impurities from the suspended ball filler are facilitated.

[0015] Optionally, the sewage treatment device further comprises a controller, and the controller stores a sewage treatment program for controlling the sewage treatment device to treat sewage and a filler cleaning program for controlling the sewage treatment device to clean the suspended ball filler, and the filler cleaning program is started at different times from the sewage treatment program.

[0016] By adopting the technical scheme, the self-cleaning of the suspended ball filler is completed in the interval time of the sewage treatment program, and the normal sewage treatment is not affected.

[0017] Optionally, the opening of the extraction head comprises two switchable states of an integral communication opening and a meshed hollow opening; when the sewage treatment device operates the sewage treatment program, the opening is the integral communication opening; when the sewage treatment device operates the filler cleaning program, the opening is switched to the meshed hollow opening, and the size of the hollow part of the meshed hollow opening is smaller than the size of the suspended ball filler.

[0018] By adopting the above technical scheme, the switching of the two states of the integral communication opening and the meshed hollow opening can ensure the extraction of sludge from the reaction tank when the sewage treatment program is running and the extraction of impurities and the protection of the suspended ball filler when the filler cleaning program is running.

[0019] Optionally, one of the air blowing vertical pipes is connected with at least two of the air blowing horizontal pipes, and the air blowing horizontal pipes are distributed in a circumferential symmetry relative to the air blowing vertical pipe.

[0020] By adopting the above technical scheme, the air blowing horizontal pipes are arranged to blow air to the reaction tank, and the suspended ball filler is mechanically stirred, which further improves the uniformity and activity of the suspended ball filler in the whole reaction tank, thereby improving the treatment effect of the suspended ball filler on sewage.

[0021] Optionally, the air blowing assembly further comprises a rotating shaft pipe, the air blowing horizontal pipe and the air blowing vertical pipe are connected through the rotating shaft pipe, one end of the rotating shaft pipe is sleeved on the air blowing vertical pipe, and the other end of the rotating shaft pipe is sleeved on the air blowing horizontal pipe; the rotating shaft pipe is rotationally connected with the air blowing vertical pipe, and the rotating shaft pipe can rotate axially relative to the air blowing vertical pipe.

[0022] By adopting the above technical scheme, the air blowing horizontal pipe rotates around the air blowing vertical pipe as the rotating shaft.

[0023] A self-cleaning method of suspended ball filler of a sewage treatment device, the cleaning method is used to clean the suspended ball filler of the sewage treatment device described in any one of the embodiments of the application, and the cleaning method comprises:

[0024] Air is blown into the reaction tank of the sewage treatment device by using the air blowing assembly of the sewage treatment device;

[0025] The suspended ball filler is stirred by the rotating movement of the air blowing horizontal pipe of the sewage treatment device and the air blown by the air blowing assembly, so that the impurities fall off from the suspended ball filler;

[0026] The separated suspended ball filler moves to the top of the reaction tank by using the rotating movement of the air blowing horizontal pipe, and the separated impurities sink to the bottom of the reaction tank;

[0027] The impurities are extracted by using the extraction assembly of the sewage treatment device.

[0028] By adopting the above technical scheme, the self-cleaning of the suspended ball filler is realized.

[0029] Optionally, the step of blowing air into the reaction tank of the sewage treatment device by using the air blowing assembly of the sewage treatment device and drying the impurities in the suspended ball filler of the sewage treatment device by using the air comprises:

[0030] Heating the hot air blown by the air blowing assembly by the heating pipeline of the air blowing assembly;

[0031] Blowing hot air into the reaction tank.

[0032] By adopting the technical scheme, the impurities can be dried.

[0033] Optionally, the step of stirring the suspended ball filler by the rotating movement of the air blowing horizontal pipeline of the sewage treatment device and the air blown by the air blowing assembly, so that the impurities fall off from the suspended ball filler, comprises:

[0034] Drying the impurities by the hot air;

[0035] Stirring the suspended ball filler by the rotating movement of the air blowing horizontal pipeline and the hot air.

[0036] By adopting the technical scheme, the impurities can fall off from the suspended ball filler.

[0037] In summary, the present application has at least one of the following beneficial technical effects:

[0038] 1. By setting the air blowing horizontal pipeline of the air blowing assembly of the sewage treatment device to rotate around the air blowing vertical pipeline as the rotating shaft, when the sewage treatment device performs sewage treatment, the mechanical stirring effect of the rotating movement of the air blowing horizontal pipeline and the rotating movement of the air outlet in the circumferential direction are utilized to improve the uniformity and activity of the suspended ball filler in the whole reaction tank, thereby improving the treatment effect of the suspended ball filler on the sewage; when the sewage treatment device performs filler cleaning, the mechanical stirring effect of the rotating movement of the air blowing horizontal pipeline and the air blowing effect of the air outlet of the air blowing horizontal pipeline are utilized to make the impurities fall off from the suspended ball filler, and the separated impurities are extracted through the extraction pipeline, so that the self-cleaning of the suspended ball filler is realized.

[0039] 2. By switching between the two states of the integrated communication opening and the meshed hollow opening, the extraction of the sludge from the reaction tank when the sewage treatment program is running is ensured, and the extraction of the impurities and the protection of the suspended ball filler when the filler cleaning program is running are ensured.

[0040] 3. By setting the position of the air outlet of the air blowing horizontal pipeline to be movable in the axial direction and the meridian direction of the air blowing horizontal pipeline, the air blowing horizontal pipeline uniformly blows air in the axial range and the depth direction of the reaction tank, the uniformity of the suspended ball filler in the whole reaction tank is further improved, and the treatment effect of the suspended ball filler on the sewage is improved. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1is a structural diagram of the sewage treatment device in Embodiment 1 of the present application.

[0042] Figure 2 is Figure 1 is an enlarged schematic view of the A area in

[0043] Figure 3 is a planar structural diagram of the integral communication opening in Embodiment 1 of the present application.

[0044] Figure 4 is a planar structural diagram of the meshed hollow opening in Embodiment 1 of the present application.

[0045] Figure 5 is a flow chart of the self-cleaning method of the suspended ball filler of the sewage treatment device in Embodiment 2 of the present application.

[0046] Explanation of reference signs:

[0047] 1, conditioning tank; 2, anoxic tank; 3, reaction tank; 31, suspended ball filler; 32, impurities; 4, sludge tank; 5, clean water tank; 6, air blowing assembly; 61, air blower; 62, air blowing vertical pipe; 63, air blowing horizontal pipe; 64, rotating shaft pipe; 7, extraction assembly; 71, extraction pipe; 72, extraction head. DETAILED DESCRIPTION

[0048] The following will be described in detail in combination with the accompanying Figures 1-5 The present application will be further described in detail.

[0049] The present application discloses a sewage treatment device and a self-cleaning method of suspended ball filler thereof.

[0050] Embodiment 1

[0051] With reference to Figure 1 , the sewage treatment device provided by the present application comprises a controller (not shown), a conditioning tank 1, an anoxic tank 2, a reaction tank 3, a sludge tank 4 and a clean water tank 5, and the conditioning tank 1, the anoxic tank 2, the reaction tank 3, the sludge tank 4 and the clean water tank 5 are sequentially communicated. The reaction tank 3 is provided with a suspended ball filler 31 for adsorbing impurities 32 in sewage. In other embodiments, the sewage treatment device can also be of other settings, and the improvements made by those skilled in the art to the sewage treatment device on the basis of the prior art without going beyond the inventive points of the present application all fall within the scope of protection of the present application.

[0052] The controller stores a sewage treatment program for controlling the sewage treatment device to perform sewage treatment, and a filler cleaning program for controlling the sewage treatment device to perform cleaning of the suspended ball filler 31. The filler cleaning program is started at a time different from the sewage treatment program, and the filler cleaning program is not executed when the sewage treatment device is executing the sewage treatment program. That is, the time for starting the filler cleaning program is the interval of the sewage treatment program, and does not affect normal sewage treatment. Further, the controller also stores a filler cleaning judgment program for sensing the running state of the sewage treatment program, detecting the frequency of use of the suspended ball filler 31, and the amount of impurities 32 adsorbed by the suspended ball filler 31, and the like. When the amount of impurities 32 adsorbed by the suspended ball filler 31 and / or the frequency of use of the suspended ball filler 31 reaches the cleaning standard of the suspended ball filler 31, and the sewage treatment device is in a state where the sewage treatment program is not being executed, the filler cleaning program is started to clean the suspended ball filler 31.

[0053] The sewage treatment device also includes a blowing assembly 6 and an extraction assembly 7, and the reaction tank 3 and the sludge tank 4 are connected by an extraction pipe 71. The extraction assembly 7 includes an extraction pump (not shown) and the extraction pipe 71, the extraction pump and the extraction pipe 71 are connected, the extraction pipe 71 extends into the reaction tank 3, and the extraction head 72 of the extraction pipe 71 is located at the bottom of the reaction tank 3. The extraction pipe 71 is used to extract the sludge and impurities 32 in the reaction tank 3 into the sludge tank 4.

[0054] The opening of the extraction head 72 includes two switchable states of an integral communication opening (see Figure 3 ) and a meshed hollow opening (see Figure 4 ). The size of the hollow part of the meshed hollow opening is smaller than the size of the suspended ball filler 31. When the sewage treatment device is running the sewage treatment program, the opening of the extraction head 72 is the integral communication opening, and the larger opening facilitates the extraction pipe 71 to extract the sludge from the reaction tank 3; when the sewage treatment device is running the filler cleaning program, the opening is switched to the meshed hollow opening, so that the extraction of the impurities 32 by the extraction pipe 71 is ensured, and the risk of the extraction pipe 71 extracting the suspended ball filler 31 is avoided.

[0055] The extraction assembly 7 can also extract a frequency converter (not shown) for adjusting the suction force of the blowing extraction assembly 7. When the sewage treatment device is running the sewage treatment program, the extraction assembly 7 extracts the sludge with a larger suction force to ensure that the sludge at the bottom of the reaction tank 3 can be smoothly sucked out of the reaction tank 3; when the sewage treatment device is running the filler cleaning program, the mass of the impurities 32 falling off from the suspended ball filler 31 is smaller, and the extraction assembly 7 can complete the extraction of the impurities 32 with a smaller suction force, so that the energy loss is reduced, and the damage to the suspended ball filler 31 by the larger suction force is avoided.

[0056] The air blowing assembly 6 comprises an air blower 61, an air blowing vertical pipe 62 and an air blowing horizontal pipe 63. One end of the air blowing vertical pipe 62 is connected to the air blower 61, and the other end is connected to the air blowing horizontal pipe 63 vertically. The air blowing vertical pipe 62 can be inserted into the reaction tank 3 from the top of the reaction tank 3 and extend into the suspended ball filler 31 as shown in the figure, or be inserted into the reaction tank 3 from the side wall of the reaction tank 3 and extend into the suspended ball filler 31, or be inserted into the reaction tank 3 from the bottom of the reaction tank 3 and extend into the suspended ball filler 31, which is not limited herein. Figure 1

[0057] The air blowing horizontal pipe 63 is located at the bottom of the reaction tank 3 and parallel to the bottom of the reaction tank 3. One end of the air blowing horizontal pipe 63 is connected to the air blowing vertical pipe 62 vertically, and the end of the air blowing horizontal pipe 63 away from the air blowing vertical pipe 62 is provided with an air outlet for blowing the air generated by the air blower 61 into the reaction tank 3.

[0058] The air blowing horizontal pipe 63 is movably connected to the air blowing vertical pipe 62. The air blowing horizontal pipe 63 can rotate around the air blowing vertical pipe 62 as the rotation shaft, so that the air blowing horizontal pipe 63 blows air uniformly in the circumferential range, thereby improving the uniformity of the suspended ball filler 31 in the entire reaction tank 3 and improving the treatment effect of the suspended ball filler 31 on the sewage.

[0059] Specifically, the air blowing assembly 6 further comprises a rotation shaft pipe 64. The air blowing horizontal pipe 63 and the air blowing vertical pipe 62 are connected through the rotation shaft pipe 64. One end of the rotation shaft pipe 64 is sleeved on the air blowing vertical pipe 62, and the other end is sleeved on the air blowing horizontal pipe 63. The rotation shaft pipe 64 is rotatably connected to the air blowing vertical pipe 62. The rotation shaft pipe 64 can rotate axially relative to the air blowing vertical pipe 62, so that the air blowing horizontal pipe 63 rotates around the air blowing vertical pipe 62 as the rotation shaft. The rotation shaft pipe 64 can be rotatably connected to the air blowing horizontal pipe 63, or fixedly connected to the air blowing horizontal pipe 63, or integrally provided with the air blowing horizontal pipe 63. In other embodiments, other connection modes can be adopted between the air blowing horizontal pipe 63 and the air blowing vertical pipe 62. Based on the inventive concept of the present application, all connection modes that can realize the rotation of the air blowing horizontal pipe 63 around the air blowing vertical pipe 62 as the rotation shaft are within the protection scope of the present application. Figure 2 Further, the air blowing horizontal pipe 63 is a telescopic air blowing pipe. In this way, the position of the air outlet of the air blowing horizontal pipe 63 can be moved in the axial direction of the air blowing horizontal pipe 63, so that the air blowing horizontal pipe 63 blows air uniformly in the axial range, further improving the uniformity of the suspended ball filler 31 in the entire reaction tank 3 and improving the treatment effect of the suspended ball filler 31 on the sewage.

[0060]

[0061] ​​Further, the air blowing vertical pipe 62 is a telescopic air blowing pipe, and the air blowing vertical pipe 62 can drive the air blowing horizontal pipe 63 to move back and forth in a direction perpendicular to the bottom of the reaction tank 3. In this way, the position of the air outlet of the air blowing horizontal pipe 63 can be moved in the meridian direction of the air blowing horizontal pipe 63, so as to realize uniform air outlet of the air blowing horizontal pipe 63 in the depth direction of the reaction tank 3, and further improve the uniformity of the suspended ball filler 31 in the whole reaction tank 3, and improve the treatment effect of the suspended ball filler 31 on the sewage.

[0062] At the same time, the circumferential rotation, axial movement and radial movement of the air blowing horizontal pipe 63 are in the form of mechanical stirring, which improves the uniformity and activity of the suspended ball filler 31 in the whole reaction tank 3, and thus improves the treatment effect of the suspended ball filler 31 on the sewage.

[0063] Further, one air blowing vertical pipe 62 corresponds to at least two air blowing horizontal pipes 63, and the air blowing horizontal pipes 63 are distributed in a circumferential symmetry relative to the air blowing vertical pipe 62. For example, one air blowing vertical pipe 62 corresponds to two air blowing horizontal pipes 63, and the included angle of the orthogonal projection of the two air blowing horizontal pipes 63 on the bottom of the reaction tank 3 is 180 degrees; one air blowing vertical pipe 62 corresponds to three air blowing horizontal pipes 63, and the included angle of the orthogonal projection of every two air blowing horizontal pipes 63 on the bottom of the reaction tank 3 is 120 degrees. The plurality of air blowing horizontal pipes 63 can be located in one plane, or at least two air blowing horizontal pipes 63 can be located in different planes. In this way, the plurality of air blowing horizontal pipes 63 are arranged to blow air to the reaction tank 3 and mechanically stir the suspended ball filler 31, and further improve the uniformity and activity of the suspended ball filler 31 in the whole reaction tank 3, and thus improve the treatment effect of the suspended ball filler 31 on the sewage.

[0064] The air blowing assembly 6 further comprises a heating pipeline (not shown) arranged between the air outlet of the air blower 61 and the air blowing vertical pipe 62, for heating the air flow blown by the air blower 61. The heating pipeline can be sleeved outside part of the air blowing vertical pipe 62, or can be connected between the air outlet of the air blower 61 and the air blowing vertical pipe 62.

[0065] The air blowing assembly 6 further comprises an air blowing frequency converter (not shown) for adjusting the air outlet volume of the air blowing assembly 6 and the heating effect of the heating pipeline. When the sewage treatment device runs the sewage treatment program, the air blowing assembly 6 blows air with a small air outlet volume, and the heating pipeline does not heat or heats at a low temperature, so as to not affect the adsorption of the impurities 32 on the suspended ball filler 31 under the premise of ensuring the uniformity and activity of the suspended ball filler 31; when the sewage treatment device runs the filler cleaning program, the air blowing assembly 6 blows air with a large air outlet volume, and the heating pipeline heats at a high temperature, so as to promote the drying and falling of the impurities 32 from the suspended ball filler 31.

[0066] The implementation principle of the sewage treatment device provided in Embodiment 1 of the present application is as follows: the air blowing horizontal pipe 63 of the air blowing assembly 6 of the sewage treatment device is arranged to be rotatable around the air blowing vertical pipe 62 as the rotation shaft; when the sewage treatment device is used to treat sewage, the mechanical stirring effect of the rotation of the air blowing horizontal pipe 63 and the rotation movement of the air outlet in the circumferential direction are utilized to improve the uniformity and activity of the suspended ball filler 31 in the whole reaction tank 3, thereby improving the treatment effect of the suspended ball filler 31 on the sewage; when the sewage treatment device is used to clean the filler, the mechanical stirring effect of the rotation of the air blowing horizontal pipe 63 and the air blowing effect of the air blowing horizontal pipe 63 are utilized to make the impurities 32 separate from the suspended ball filler 31, and the separated impurities 32 are extracted through the extraction pipe 71, thereby realizing the self-cleaning of the suspended ball filler 31. In addition, the sewage treatment device claimed in the present embodiment only needs to improve the air blowing pipe of the air blowing assembly 6 and the extraction head 72 of the extraction assembly 7, which can improve the treatment effect of the suspended ball filler 31 on the sewage and realize the self-cleaning effect of the suspended ball filler 31, and the structure is improved small and easy to implement in industry.

[0067] Embodiment 2

[0068] Correspondingly, the present embodiment provides a self-cleaning method of the suspended ball filler 31 of the sewage treatment device, which is used to clean the suspended ball filler 31 of the sewage treatment device described in Embodiment 1, and the cleaning method comprises the following steps B1 to B4.

[0069] Step B1: air is blown into the reaction tank of the sewage treatment device by the air blowing assembly of the sewage treatment device.

[0070] Specifically, step B1 comprises: heating the hot air blown by the air blowing assembly 6 by the heating pipe of the air blowing assembly 6; and blowing the hot air into the reaction tank 3.

[0071] Step B2: the suspended ball filler is stirred by the rotation movement of the air blowing horizontal pipe of the sewage treatment device and the air blown by the air blowing assembly, so that the impurities fall off from the suspended ball filler.

[0072] Specifically, step B2 comprises: drying the impurities 32 by the hot air; and stirring the suspended ball filler 31 by the rotation movement of the air blowing horizontal pipe 63, the axial movement of the air blowing horizontal pipe 63, the radial movement of the air blowing horizontal pipe 63 and the hot air, so that the impurities 32 fall off from the suspended ball filler 31.

[0073] Step B3: the separated suspended ball filler is moved to the top of the reaction tank by the rotation movement of the air blowing horizontal pipe, and the separated impurities are sunk to the bottom of the reaction tank.

[0074] Specifically, in step B3, the suspended ball fillers 31 and the impurities 32 rub against each other, the suspended ball fillers 31 with lighter quality move upward, and the impurities 32 with heavier quality move downward and deposit at the bottom of the reaction tank 3. Step B3 can also occur simultaneously with step B2.

[0075] Step B4, extracting the impurities through the extraction assembly of the sewage treatment device.

[0076] Specifically, the impurities 32 deposited at the bottom of the reaction tank 3 are extracted out of the reaction tank 3 by the extraction assembly 7, so as to realize the self-cleaning of the suspended ball fillers 31.

[0077] The implementation principle of the embodiment 2 of the present application is that the mechanical stirring effect of the rotation of the air blowing horizontal pipe 63 and the air blowing effect of the air blowing horizontal pipe 63 are utilized to make the impurities 32 separate from the suspended ball fillers 31, the separated impurities 32 are extracted through the extraction pipe 71, so as to realize the self-cleaning of the suspended ball fillers 31.

[0078] The above are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A method for self-cleaning of suspended ball packing of a sewage treatment plant, characterized in that, The sewage treatment device comprises: a reaction tank (3) provided with suspended ball fillers (31) for adsorbing impurities (32) in sewage; an air blowing assembly (6) comprising an air blower (61), an air blowing vertical pipe (62) and an air blowing horizontal pipe (63), one end of the air blowing vertical pipe (62) being connected to the air blower (61), the other end of the air blowing vertical pipe (62) being connected to the air blowing horizontal pipe (63) perpendicularly, the air blowing horizontal pipe (63) being located at the bottom of the reaction tank (3) and being parallel to the bottom of the reaction tank (3), one end of the air blowing horizontal pipe (63) away from the air blowing vertical pipe (62) being provided with an air outlet, the air blowing horizontal pipe (63) being movably connected to the air blowing vertical pipe (62), the air blowing horizontal pipe (63) rotating around the air blowing vertical pipe (62) to mechanically stir the suspended ball fillers (31) through the rotation thereof; an extraction assembly (7) comprising an extraction pump and an extraction pipe (71), the extraction pump being connected to the extraction pipe (71), the extraction pipe (71) extending into the reaction tank (3), and an extraction head (72) of the extraction pipe (71) being located at the bottom of the reaction tank (3); the air blowing assembly (6) further comprising a heating pipe provided between the air outlet of the air blower (61) and the air blowing vertical pipe (62) to heat the air blown by the air blower (61); a self-cleaning method of the suspended ball fillers of the sewage treatment device, comprising: blowing hot air into the reaction tank (3) of the sewage treatment device by the air blowing assembly (6) of the sewage treatment device to dry the impurities (32) in the suspended ball fillers (31) of the sewage treatment device by the hot air; mechanically stirring the suspended ball fillers (31) by the rotation of the air blowing horizontal pipe (63) of the sewage treatment device and stirring the suspended ball fillers (31) by the hot air blown by the air blowing assembly (6), so that the impurities (32) fall off from the suspended ball fillers (31); moving the separated suspended ball fillers (31) to the top of the reaction tank (3) by the rotational movement of the air blowing horizontal pipe (63), and sinking the separated impurities (32) to the bottom of the reaction tank (3); extracting the impurities (32) by the extraction assembly (7) of the sewage treatment device.

2. The self-cleaning method of the suspended ball packing of the sewage treatment device according to claim 1, characterized in that, the air blowing horizontal pipe (63) is a telescopic air blowing pipe; and / or the air blowing vertical pipe (62) is a telescopic air blowing pipe, and the air blowing vertical pipe (62) can drive the air blowing horizontal pipe (63) to move back and forth in a direction perpendicular to the bottom of the reaction tank (3).

3. The self-cleaning method of the suspended ball packing of the sewage treatment device according to claim 1 or 2, characterized in that, The sewage treatment device further comprises a controller, the controller storing a sewage treatment program for controlling the sewage treatment device to treat sewage and a filler cleaning program for controlling the sewage treatment device to clean the suspended ball fillers (31), the filler cleaning program being started at different times from the sewage treatment program.

4. The self-cleaning method of the suspended ball packing of the sewage treatment device according to claim 3, characterized in that, The opening of the extraction head (72) includes two switchable states of an integral communication opening and a meshed open opening; when the sewage treatment device runs the sewage treatment program, the opening is the integral communication opening; when the sewage treatment device runs the filler cleaning program, the opening is switched to the meshed open opening, and the size of the open part of the meshed open opening is smaller than the size of the suspended ball filler (31).

5. The self-cleaning method of the suspended ball packing of the sewage treatment device according to claim 1, characterized by, One of the air blowing vertical pipes (62) is connected to at least two of the air blowing horizontal pipes (63), and the air blowing horizontal pipes (63) are distributed in a circumferential symmetry relative to the air blowing vertical pipe (62).

6. The self-cleaning method of the suspended ball packing of the sewage treatment device according to claim 1 or 5, characterized in that, The air blowing assembly (6) further includes a rotating shaft pipe (64), the air blowing horizontal pipe (63) and the air blowing vertical pipe (62) are connected through the rotating shaft pipe (64), one end of the rotating shaft pipe (64) is sleeved on the air blowing vertical pipe (62), and the other end of the rotating shaft pipe (64) is sleeved on the air blowing horizontal pipe (63); the rotating shaft pipe (64) is rotationally connected with the air blowing vertical pipe (62), and the rotating shaft pipe (64) can rotate axially relative to the air blowing vertical pipe (62).

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