A sewage treatment device and method for environmental protection engineering

Abstract

The present invention discloses a sewage treatment equipment and method for environmental protection engineering, which relates to the field of sewage treatment, including: a treatment tank, wherein the interior of the treatment tank is filled with a plurality of MBBR biological fillers; a filtering mechanism, wherein the filtering mechanism includes an outer cylinder and a water filter net cylinder, wherein the interior of the water filter net cylinder is provided with a first hollow rotating shaft and a first spiral blade; a water outlet mechanism, wherein the water outlet mechanism includes a discharge cylinder, a drainage assembly and a conveying pipe connected in sequence; a discharge mechanism, wherein the discharge mechanism includes a reflux pipe, and the two ends of the reflux pipe are respectively connected to the discharge cylinder and the outer cylinder. The MBBR biological filler of the present invention can circulate in the overall process, and the MBBR biological filler can contact with the sewage in the water outlet cavity, and then enter the treatment tank together, and finally pass through the conveying pipe together, and the overall process is long, so that the MBBR biological filler is in contact with the sewage for a long time, thereby improving the treatment effect of the MBBR biological filler on the sewage, and no shutdown is required when replacing the MBBR biological filler.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment, and in particular to sewage treatment equipment and method for environmental protection engineering. Background Art

[0002] Wastewater treatment is the process of purifying wastewater to meet the water quality requirements for discharge into a water body or reuse. Environmental protection projects refer to projects specifically done for environmental protection. Based on a set of envisioned goals, they use relevant scientific knowledge and technical means to deal with environmental pollution problems through the organized activities of a group of people. The content of environmental protection projects mainly includes air pollution prevention and control projects, water pollution prevention and control projects, solid waste treatment and utilization projects, noise control projects, etc. There are many methods for wastewater treatment in environmental protection projects, one of which is to treat wastewater through biotechnology.

[0003] MBBR biological filler is one of the biological fillers for sewage treatment, also known as fluidized bed filler. It is an efficient sewage treatment method that absorbs the advantages of both traditional fluidized bed and biological contact oxidation. The core part of MBBR biological filler is to add suspended filler with a specific gravity close to that of water directly into the aeration tank as an active carrier of microorganisms. It is in a fluidized state by relying on the aeration and water flow in the aeration tank. It is a process that combines the suspended growth activated sludge method and the attached growth biofilm method. Unlike previous fillers, suspended fillers can frequently contact with sewage, so they are called "mobile biofilms."

[0004] At present, in the equipment that uses MBBR biological fillers to treat sewage, the MBBR biological fillers are filled in the treatment tank. After the sewage enters the treatment tank and mixes with the MBBR biological fillers, it is discharged through the interception net on the top of the side wall of the treatment tank. Although the sewage is effectively in contact with the MBBR biological fillers in the treatment tank, the sewage flow in the treatment tank is short, which shortens the contact time between the sewage and the MBBR biological fillers, reducing the treatment effect. At the same time, the MBBR biological fillers in the treatment tank need to be replaced, and the entire equipment needs to be shut down, the MBBR biological fillers need to be taken out, and the sewage can be treated again after the MBBR biological fillers are replaced, which is very inconvenient.

[0005] Therefore, it is necessary to invent a sewage treatment equipment and method for environmental protection engineering to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a sewage treatment equipment and method for environmental protection engineering, so as to solve the problem proposed in the above background technology that the sewage has a short flow in the treatment tank, so that the contact time between the sewage and the MBBR biological filler is short, which reduces its treatment effect. At the same time, the MBBR biological filler in the treatment tank needs to be replaced, and the whole equipment needs to be shut down. After the MBBR biological filler is replaced, it can resume working for sewage treatment, which is very inconvenient.

[0007] In order to achieve the above object, the present invention provides the following technical solution: a sewage treatment equipment for environmental protection engineering, comprising:

[0008] A treatment tank, wherein a through columnar cavity and a conical cavity are provided in the treatment tank, and the interior of the treatment tank is filled with a plurality of MBBR biofillers;

[0009] A filter mechanism, the filter mechanism is installed on the upper left side of the treatment tank, the filter mechanism includes an outer cylinder and a water filter cylinder, the lower part of the side wall of the water filter cylinder is connected to a water inlet pipe, a first hollow shaft and a first spiral blade are arranged inside the water filter cylinder, a sewage cylinder is fixed on the top of the outer cylinder, and a first drive assembly for driving the first hollow shaft to rotate is arranged on the outer cylinder;

[0010] A water outlet mechanism, the water outlet mechanism is installed on the upper right part of the treatment tank, the water outlet mechanism comprises a discharge cylinder, a drainage assembly and a delivery pipe connected in sequence, a second hollow shaft and a third spiral blade are nested inside the delivery pipe, air outlet holes are opened at equal intervals on the surface of the second hollow shaft, and a second drive assembly for driving the second hollow shaft to rotate is provided on the drainage assembly;

[0011] The discharge mechanism comprises a reflux pipe, both ends of which are respectively connected to the discharge cylinder and the outer cylinder, the middle part of the lower side of the reflux pipe is connected to the discharge pipe, and a switching assembly is provided on the discharge pipe;

[0012] An air supply mechanism is connected to the first hollow rotating shaft and the second hollow rotating shaft respectively.

[0013] Preferably, the water filter net cylinder is nested in the outer cylinder, the top edge of the water filter net cylinder is fixedly connected to the top inner wall of the outer cylinder, a water outlet cavity is provided between the water filter net cylinder and the outer cylinder, and the water outlet cavity is connected to the inner cavity of the treatment tank;

[0014] A second spiral blade is fixedly sleeved on the outer side of the water filter cylinder, and the outer end of the second spiral blade is connected to the inner wall of the outer cylinder;

[0015] The inner cavity of the sewage cylinder is connected with the inner cavity of the water filter net cylinder, and the side wall of the sewage cylinder is connected with a sewage pipe;

[0016] The upper end of the first hollow rotating shaft extends into the sewage barrel and rotates to penetrate the top wall of the sewage barrel. The first spiral blade is fixedly sleeved on the first hollow rotating shaft. The upper end of the first spiral blade extends into the sewage barrel. The first spiral blade is provided with a plurality of water filtering holes. The first spiral blade rotates to transport impurities and sewage upward, and water molecules in the sewage pass through the mesh of the water filtering net cylinder and enter the water outlet cavity.

[0017] One end of the water inlet pipe away from the water filter net cylinder passes through the side wall of the outer cylinder and extends out of the outer cylinder. The water inlet pipe is connected to an external sewage pipe. Sewage enters the water filter net cylinder through the water inlet pipe. The water filter net cylinder filters the sewage and intercepts large particles of impurities in the sewage.

[0018] The upper front part of the outer cylinder is provided with a feed inlet, through which new MBBR biological fillers are conveniently added. The MBBR biological fillers first enter the water outlet cavity, contact with the sewage, and fall into the treatment tank along the second spiral blade;

[0019] The first driving assembly includes a first servo motor and a first driven gear. The first driven gear is fixedly sleeved on the upper end of the first hollow rotating shaft. The first servo motor is installed on the top of the outer cylinder. The output end of the first servo motor is connected to the first driving gear. The first driving gear is meshed with the first driven gear.

[0020] Preferably, the lower end of the first hollow rotating shaft rotates to penetrate the bottom wall of the water filter net cylinder and extend into the treatment tank, the bottom end of the first hollow rotating shaft is connected to a first connecting pipe, the inner cavity of the first connecting pipe is connected to the inner cavity of the first hollow rotating shaft, the left and right sides of the bottom end of the first connecting pipe are connected to first aeration pipes, and the upper side of the first aeration pipe is evenly spaced with first air nozzles;

[0021] The air in the first hollow rotating shaft enters the first aeration pipe through the first connecting pipe and is sprayed out by the first air nozzle on the first aeration pipe to provide oxygen;

[0022] The first connecting pipe and the first aeration pipe are in the cylindrical cavity. The first hollow shaft rotates while driving the first aeration pipe to rotate. The rotation of the first aeration pipe stirs the sewage and MBBR biological filler in the cylindrical cavity, making their contact more complete and improving the oxygen supply effect.

[0023] Preferably, the lower end of the delivery pipe passes through the top wall of the treatment tank and extends into the conical cavity;

[0024] The drainage assembly includes a drainage box, a drainage pipe is provided at the lower right part of the drainage box, a drainage cavity is provided in the drainage box, a water filter mesh pipe is provided at the left part of the drainage cavity, the upper and lower ends of the water filter mesh pipe are connected to the upper and lower side walls of the drainage cavity, the water filter mesh pipe is located between the discharge cylinder and the delivery pipe, the inner cavities of the water filter mesh pipe, the discharge cylinder and the delivery pipe have the same diameter, and the inner cavity of the water filter mesh pipe is connected with the inner cavities of the discharge cylinder and the delivery pipe;

[0025] The upper end of the second hollow rotating shaft passes through the water filter mesh pipe and the top wall of the discharge cylinder in sequence, and the upper end of the third spiral blade passes through the water filter mesh pipe and extends into the discharge cylinder;

[0026] The third spiral blade rotates to transport the water and MBBR biological filler in the conical cavity upward. When the water and MBBR biological filler reach the drainage box through the delivery pipe, the treated water falls into the drainage cavity through the water filter mesh pipe and is finally discharged through the drainage pipe. The third spiral blade rotates and continues to transport the MBBR biological filler upward.

[0027] The second driving assembly includes a second servo motor and a second driven gear. The second driven gear is fixedly sleeved on the upper end of the second hollow rotating shaft. The second servo motor is installed on the drainage box. The output end of the second servo motor is connected to the second driving gear. The second driving gear is meshingly connected with the second driven gear.

[0028] Preferably, the lower end of the second hollow rotating shaft extends out of the conveying pipe, the left and right sides of the bottom end of the second hollow rotating shaft are connected with second connecting pipes, the inner cavity of the second connecting pipe is connected with the inner cavity of the second hollow rotating shaft, the end of the second connecting pipe away from the second hollow rotating shaft is connected with a second aeration pipe, and second air nozzles are installed on the second aeration pipe at equal intervals;

[0029] The air enters the second connecting pipe through the second hollow rotating shaft, and then enters the second aeration pipe, and is ejected from the second air nozzle thereon to supply oxygen;

[0030] The second connecting pipe and the second aeration pipe are located in the conical cavity. The rotation of the second hollow rotating shaft drives the second aeration pipe to rotate, stirring the water flow in the conical cavity and causing the sewage in the conical cavity to collide with the sewage in the columnar cavity, thereby improving the contact effect between the sewage and the MBBR biological filler and improving the oxygen supply effect.

[0031] Preferably, the inner cavity of the reflux pipe is respectively connected with the inner cavity of the water outlet cavity and the discharge barrel, and the height of the connection between the reflux pipe and the outer barrel is lower than the height of the connection between the reflux pipe and the discharge barrel. The height difference is conducive to the MBBR biological filler discharged from the discharge barrel to pass through the reflux pipe and enter the water outlet cavity.

[0032] Preferably, a discharge port is provided at a position of the discharge pipe corresponding to the bottom wall of the inner cavity of the reflux pipe, and the inner cavity of the discharge pipe is connected with the inner cavity of the reflux pipe through the discharge port;

[0033] The switching assembly includes an electric cylinder and a movable plate slidably arranged on the left side wall of the inner cavity of the discharge pipe, the upper end of the movable plate passes through the discharge port and extends into the inner cavity of the return pipe, a cover plate is fixed to the upper end of the movable plate, the size of the cover plate is larger than the size of the discharge port, a slide groove is opened on the upper part of the left side wall of the discharge pipe, a slider is fixed to the middle part of the side wall of the movable plate, the slider slides through the slide groove, a base is fixed to the left side wall of the discharge pipe, the base of the electric cylinder is installed on the base, and the telescopic end of the electric cylinder is connected to the slider;

[0034] Under normal circumstances, the cover plate blocks the discharge port, and the MBBR biological filler discharged from the discharge barrel can pass through the reflux pipe into the water outlet chamber for circulation. When the MBBR biological filler in the equipment needs to be replaced, the electric cylinder works to push the slider upward, and the upward movement of the slider drives the moving plate to move upward, and the moving plate moves up to push the cover plate to move up, and the cover plate moves up to expose the discharge port. At the same time, the upper part of the moving plate blocks the left cavity of the reflux pipe, so that the MBBR biological filler discharged from the discharge barrel enters the reflux pipe, enters the discharge pipe through the discharge port, and is discharged from the discharge pipe. New MBBR biological filler can be added through the feed port. When replacing the MBBR biological filler, the entire equipment does not need to be shut down.

[0035] Preferably, the air delivery mechanism includes an air pump, the air outlet end of the air pump is connected to a gas main pipe, the end of the gas main pipe away from the air pump is respectively connected to a first gas branch pipe and a second gas branch pipe through a three-way joint, the first gas branch pipe and the second gas branch pipe are both connected to a rotating joint at one end away from the gas main pipe, the first gas branch pipe is connected to the upper end of the first hollow rotating shaft through the rotating joint, and the second gas branch pipe is connected to the second hollow rotating shaft through the rotating joint.

[0036] Preferably, the height of the inner wall of the bottom of the conical cavity is lower than the height of the cylindrical cavity, and a discharge pipe is provided at the right bottom of the processing tank, and a valve is installed on the discharge pipe.

[0037] A sewage treatment method of a sewage treatment equipment for environmental protection engineering comprises the following specific steps:

[0038] Step 1: Add the MBBR biofiller into the water outlet chamber through the feed port on the outer cylinder, and connect the water inlet pipe to the external sewage pipe;

[0039] Step 2: Sewage enters the water filter cylinder through the water inlet pipe, and water molecules in the sewage enter the water outlet cavity through the mesh of the water filter cylinder, and come into contact with the MBBR biological filler. The MBBR biological filler purifies the sewage, and then the water and MBBR biological filler fall into the cylindrical cavity in the treatment tank along the second spiral blade in the water outlet cavity. Large particles of impurities in the sewage in the water filter cylinder are intercepted by the water filter cylinder;

[0040] Step 3: The first servo motor drives the first driven gear to rotate through the first driving gear, the first driven gear drives the first hollow shaft to rotate, the first hollow shaft drives the first spiral blade to rotate, the first spiral blade rotates to transport the impurities intercepted at the bottom of the water filter cylinder upward to the sewage cylinder, and then discharge them from the sewage pipe, so as to filter the sewage and discharge the impurities generated by the filtration at the same time;

[0041] Step 4: The sewage and MBBR biological filler in the cylindrical cavity are mixed and enter the conical cavity. At the same time, the air pump works to input air into the first gas branch pipe and the second gas branch pipe respectively through the gas main pipe, and then the air enters the first hollow shaft and the second hollow shaft respectively. The air in the first hollow shaft enters the first aeration pipe through the first connecting pipe and is sprayed out by the first air nozzle on the first aeration pipe to supply oxygen. The air in the second hollow shaft enters the second aeration pipe through the second connecting pipe and is sprayed out by the second air nozzle thereon to supply oxygen. The rotation of the first hollow shaft drives the rotation of the first aeration pipe at the same time. The rotation of the first aeration pipe stirs the sewage and MBBR biological filler in the cylindrical cavity, making their contact more complete and improving the oxygen supply effect.

[0042] Step 5: The second servo motor drives the second driven gear to rotate through the second driving gear, the second driven gear drives the second hollow shaft to rotate, the second hollow shaft drives the second aeration tube to rotate, stirs the water flow in the conical cavity, and makes the sewage in the conical cavity collide with the sewage in the cylindrical cavity, thereby improving the contact effect between the sewage and the MBBR biological filler and the oxygen supply effect. At the same time, the rotation of the second hollow shaft drives the third spiral blade to rotate, and the rotation of the third spiral blade transports the water in the conical cavity and the MBBR biological filler upward;

[0043] Step 6: When the third spiral blade transports the water and MBBR biological filler upward, air is ejected from the air outlet on the second hollow shaft to supply oxygen to the MBBR biological filler. When the third spiral blade rotates to transport the water and MBBR biological filler to the water filter mesh pipe in the drainage box, the treated water falls into the drainage cavity through the water filter mesh pipe and is finally discharged through the drainage pipe.

[0044] Step 7: The third spiral blade continues to rotate, and continues to transport the MBBR biological filler upward, transports the MBBR biological filler to the discharge barrel, and then flows back to the water outlet chamber through the reflux pipe, contacts with the newly entered sewage to purify the sewage, and the MBBR biological filler can circulate in the overall process;

[0045] Step 8: When the MBBR biological filler in the equipment needs to be replaced, the electric cylinder works to push the slider upward, which drives the movable plate upward, and the movable plate pushes the cover plate upward to expose the discharge port. At the same time, the upper part of the movable plate blocks the left cavity of the reflux pipe, so that the MBBR biological filler discharged from the discharge barrel enters the reflux pipe, enters the discharge pipe through the discharge port, and is discharged from the discharge pipe. New MBBR biological filler can be added through the feed port. When replacing the MBBR biological filler, the entire equipment does not need to be shut down.

[0046] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0047] 1. Through the setting of the filtering mechanism, treatment tank, water outlet mechanism and discharge mechanism, the MBBR biological filler can circulate in the overall process. The MBBR biological filler can contact with the sewage in the water outlet chamber, then enter the treatment tank together, and finally pass through the conveying pipe together. The overall process is long, so that the MBBR biological filler has a long contact time with the sewage, which improves the treatment effect of the MBBR biological filler on sewage;

[0048] 2. When the MBBR biological filler needs to be replaced, the electric cylinder works to push the moving plate upward, and the moving plate pushes the cover plate upward, and the cover plate moves upward to expose the discharge port. At the same time, the upper part of the moving plate blocks the left cavity of the reflux pipe, so that the MBBR biological filler discharged from the discharge barrel enters the reflux pipe, enters the discharge pipe through the discharge port, and is discharged from the discharge pipe. New MBBR biological filler can be added through the feed port. When replacing the MBBR biological filler, the entire equipment does not need to be shut down;

[0049] 3. By setting up a filtering mechanism, after the sewage enters the water filter cylinder through the water inlet pipe, the water filter cylinder can intercept large particles of impurities in the sewage. At the same time, the first spiral blade rotates to transport the large particles of impurities to the sewage discharge cylinder and discharge them from the sewage discharge pipe, thereby filtering the sewage and discharging the impurities generated by the filtration at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0051] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0052] Figure 2 For the present invention Figure 1 anatomical diagram;

[0053] Figure 3 It is a schematic diagram of the filtering mechanism of the present invention;

[0054] Figure 4 It is an anatomical diagram of the filtering mechanism of the present invention;

[0055] Figure 5 For the present invention Figure 4 anatomical diagram;

[0056] Figure 6 A schematic diagram of the water outlet mechanism of the present invention;

[0057] Figure 7 It is the anatomical diagram of the water outlet mechanism of the present invention;

[0058] Figure 8 It is an anatomical diagram of the drainage component of the present invention;

[0059] Fig. 9 It is a schematic diagram of the discharging mechanism of the present invention;

[0060] Fig.10 It is an anatomical diagram of the discharge mechanism of the present invention;

[0061] Fig.11 It is an anatomical diagram of the connection between the reflux pipe and the discharge pipe of the present invention;

[0062] Fig.12 It is a schematic diagram of the connection between the movable plate and the cover plate of the present invention;

[0063] Fig.13 It is a schematic diagram of the air supply mechanism of the present invention.

[0064] Description of reference numerals:

[0065] 1. Treatment tank; 11. Columnar cavity; 12. Conical cavity; 13. MBBR biological filler;

[0066] 2. Filter mechanism; 21. Outer cylinder; 211. Water outlet cavity; 212. Feed port; 22. Water filter cylinder; 23. Water inlet pipe; 24. First hollow rotating shaft; 25. First spiral blade; 251. Water filter hole; 26. Drain cylinder; 261. Drain pipe; 27. Second spiral blade; 28. First drive assembly; 281. First servo motor; 282. First driven gear; 283. First driving gear; 29. ​​First connecting pipe; 291. First aeration pipe;

[0067] 3. water outlet mechanism; 31. discharge cylinder; 32. drainage assembly; 321. drainage box; 322. drainage cavity; 323. water filter mesh pipe; 324. drainage pipe; 33. delivery pipe; 34. second hollow shaft; 341. air outlet; 35. third spiral blade; 36. second driving assembly; 361. second servo motor; 362. second driven gear; 363. second driving gear; 37. second connecting pipe; 38. second aeration pipe;

[0068] 4. Discharge mechanism; 41. Reflux pipe; 411. Discharge port; 42. Discharge pipe; 421. Slide; 43. Moving plate; 431. Sliding block; 44. Cover plate; 45. Base; 46. Electric cylinder;

[0069] 5. Air supply mechanism; 51. Air pump; 52. Main gas supply pipe; 53. First gas supply branch pipe; 54. Second gas supply branch pipe; 55. Rotary joint. DETAILED DESCRIPTION

[0070] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0071] The present invention provides Figures 1 to 12 A sewage treatment equipment for environmental protection engineering shown in the figure comprises:

[0072] A treatment tank 1, wherein a through columnar cavity 11 and a conical cavity 12 are provided in the treatment tank 1, and a plurality of MBBR biological fillers 13 are filled in the treatment tank 1;

[0073] The filter mechanism 2 is installed on the upper left side of the treatment tank 1. The filter mechanism 2 includes an outer cylinder 21 and a water filter cylinder 22. The lower part of the side wall of the water filter cylinder 22 is connected with a water inlet pipe 23. The interior of the water filter cylinder 22 is provided with a first hollow shaft 24 and a first spiral blade 25. A sewage cylinder 26 is fixed on the top of the outer cylinder 21. The outer cylinder 21 is provided with a first driving assembly 28 for driving the first hollow shaft 24 to rotate;

[0074] The water outlet mechanism 3 is installed on the upper right part of the treatment tank 1. The water outlet mechanism 3 includes a discharge cylinder 31, a drainage assembly 32 and a delivery pipe 33 connected in sequence. A second hollow shaft 34 and a third spiral blade 35 are embedded in the delivery pipe 33. The drainage assembly 32 is provided with a second driving assembly 36 for driving the second hollow shaft 34 to rotate.

[0075] The discharge mechanism 4 includes a reflux pipe 41, and both ends of the reflux pipe 41 are respectively connected to the discharge cylinder 31 and the outer cylinder 21;

[0076] The air supply mechanism 5 is connected to the first hollow rotating shaft 24 and the second hollow rotating shaft 34 respectively.

[0077] The water filter net cylinder 22 is nested in the outer cylinder 21, and the top edge of the water filter net cylinder 22 is fixedly connected to the top inner wall of the outer cylinder 21. A water outlet cavity 211 is provided between the water filter net cylinder 22 and the outer cylinder 21, and the water outlet cavity 211 is connected to the inner cavity of the treatment tank 1;

[0078] A second spiral blade 27 is fixedly sleeved on the outer side of the water filter cylinder 22, and the outer end of the second spiral blade 27 is connected to the inner wall of the outer cylinder body 21;

[0079] The inner cavity of the sewage cylinder 26 is connected to the inner cavity of the water filter cylinder 22, and the side wall of the sewage cylinder 26 is connected to a sewage pipe 261;

[0080] The upper end of the first hollow rotating shaft 24 extends into the sewage barrel 26 and rotates to penetrate the top wall of the sewage barrel 26. The first spiral blade 25 is fixedly sleeved on the first hollow rotating shaft 24. The upper end of the first spiral blade 25 extends into the sewage barrel 26. The first spiral blade 25 is provided with a plurality of water filtering holes 251. The first spiral blade 25 rotates to transport impurities and sewage upward, and water molecules in the sewage pass through the mesh of the water filtering net cylinder 22 and enter the water outlet cavity 211.

[0081] One end of the water inlet pipe 23 away from the water filter net cylinder 22 passes through the side wall of the outer cylinder 21 and extends out of the outer cylinder 21. The water inlet pipe 23 is connected to an external sewage pipe. Sewage enters the water filter net cylinder 22 through the water inlet pipe 23. The water filter net cylinder 22 filters the sewage and intercepts large particles of impurities in the sewage.

[0082] A feed port 212 is installed at the front upper part of the outer cylinder 21, through which new MBBR biological filler 13 can be conveniently added. The MBBR biological filler 13 first enters the water outlet cavity 211, contacts with the sewage, and falls into the treatment tank 1 along the second spiral blade 27;

[0083] The first driving assembly 28 includes a first servo motor 281 and a first driven gear 282. The first driven gear 282 is fixedly sleeved on the upper end of the first hollow rotating shaft 24. The first servo motor 281 is installed on the top of the outer cylinder 21. The output end of the first servo motor 281 is connected to the first driving gear 283. The first driving gear 283 is meshedly connected with the first driven gear 282.

[0084] The lower end of the delivery pipe 33 passes through the top wall of the treatment tank 1 and extends into the conical cavity 12;

[0085] The drainage assembly 32 includes a drainage box 321, a drainage pipe 324 is provided at the lower right part of the drainage box 321, a drainage cavity 322 is provided in the drainage box 321, a water filter mesh pipe 323 is provided at the left part of the drainage cavity 322, the upper and lower ends of the water filter mesh pipe 323 are connected to the upper and lower side walls of the drainage cavity 322, the water filter mesh pipe 323 is located between the discharge cylinder 31 and the delivery pipe 33, the inner cavity diameters of the water filter mesh pipe 323, the discharge cylinder 31 and the delivery pipe 33 are the same, and the inner cavity of the water filter mesh pipe 323 is connected with the inner cavity of the discharge cylinder 31 and the inner cavity of the delivery pipe 33;

[0086] The upper end of the second hollow rotating shaft 34 passes through the water filtering mesh tube 323 and the top wall of the discharge cylinder 31 in sequence, and the upper end of the third spiral blade 35 passes through the water filtering mesh tube 323 and extends into the discharge cylinder 31;

[0087] The third spiral blade 35 rotates to transport the water and MBBR biological filler 13 in the conical cavity 12 upward. When the water and MBBR biological filler 13 reach the drainage box 321 through the delivery pipe 33, the treated water falls into the drainage cavity 322 through the water filter mesh pipe 323 and is finally discharged through the drainage pipe 324. The third spiral blade 35 rotates and continues to transport the MBBR biological filler 13 upward.

[0088] The second driving assembly 36 includes a second servo motor 361 and a second driven gear 362. The second driven gear 362 is fixedly sleeved on the upper end of the second hollow rotating shaft 34. The second servo motor 361 is installed on the drainage box 321. The output end of the second servo motor 361 is connected to the second driving gear 363. The second driving gear 363 is meshingly connected with the second driven gear 362.

[0089] The height of the inner wall of the bottom of the conical cavity 12 is lower than the height of the cylindrical cavity 11. A discharge pipe is provided at the bottom of the right side of the processing tank 1, and a valve is installed on the discharge pipe.

[0090] In the present invention, the MBBR biological filler 13 is added into the water outlet cavity 211 through the feed port 212 on the outer cylinder 21, and the water inlet pipe 23 is connected to the external sewage pipe. The sewage enters the water filter net cylinder 22 through the water inlet pipe 23, and the water molecules in the sewage enter the water outlet cavity 211 through the mesh of the water filter net cylinder 22, and contact with the MBBR biological filler 13. The MBBR biological filler 13 purifies the sewage, and then the water and the MBBR biological filler 13 fall into the cylindrical cavity 11 in the treatment tank 1 along the second spiral blade 27 in the water outlet cavity 211. The large particles of impurities in the sewage in the water filter net cylinder 22 are intercepted by the water filter net cylinder 22. At the same time, the first servo motor 281 drives the first driven gear 282 to rotate through the first driving gear 283. The first driven gear 282 rotates to drive the first hollow shaft 24 to rotate. The first hollow shaft 24 rotates to drive the first spiral blade 25 to rotate. The first spiral blade 25 rotates to transport the impurities intercepted at the bottom of the water filter net cylinder 22 upward to the sewage cylinder 26, and then discharge them from the sewage pipe 261. While filtering the sewage, the impurities generated by the filtration are discharged synchronously. The cylindrical cavity 1 1 and the MBBR biological filler 13 are mixed and enter the conical cavity 12, the second servo motor 361 works to drive the second driven gear 362 to rotate through the second driving gear 363, the second driven gear 362 rotates to drive the second hollow shaft 34 to rotate, the second hollow shaft 34 rotates to drive the third spiral blade 35 to rotate, the third spiral blade 35 rotates to transport the water and MBBR biological filler 13 in the conical cavity 12 upward, and when the water and MBBR biological filler 13 are transported to the water filter network pipe 323 in the drainage box 321, the treated water passes through the water filter network pipe 324. The pipe 323 falls into the drainage chamber 322 and is finally discharged through the drainage pipe 324. The third spiral blade 35 continues to rotate, and continues to transport the MBBR biological filler 13 upward, and transports the MBBR biological filler 13 to the discharge barrel 31, and then flows back to the water outlet chamber 211 through the reflux pipe 41, and contacts with the sewage that has just entered to purify the sewage. The MBBR biological filler 13 can circulate in the overall process, and the overall process is long, so that the MBBR biological filler 13 is in contact with the sewage for a long time, thereby improving the treatment effect of the MBBR biological filler 13 on sewage.

[0091] like Figures 9 to 12 As shown, the inner cavity of the return pipe 41 is respectively connected with the inner cavity of the water outlet cavity 211 and the discharge cylinder 31, and the height of the connection between the return pipe 41 and the outer cylinder 21 is lower than the height of the connection between the return pipe 41 and the discharge cylinder 31. The height difference is set to facilitate the MBBR biological filler 13 discharged from the discharge cylinder 31 to pass through the return pipe 41 and enter the water outlet cavity 211.

[0092] A discharge pipe 42 is connected to the middle of the lower side of the return pipe 41, and a switching component is provided on the discharge pipe 42;

[0093] A discharge port 411 is provided at the bottom wall of the inner cavity of the return pipe 41 at a position corresponding to the discharge pipe 42, and the inner cavity of the discharge pipe 42 is connected with the inner cavity of the return pipe 41 through the discharge port 411;

[0094] The switching assembly includes an electric cylinder 46 and a movable plate 43 slidably arranged on the left side wall of the inner cavity of the discharge pipe 42. The upper end of the movable plate 43 passes through the discharge port 411 and extends into the inner cavity of the return pipe 41. A cover plate 44 is fixed to the upper end of the movable plate 43. The size of the cover plate 44 is larger than the size of the discharge port 411. A slide groove 421 is opened on the upper part of the left side wall of the discharge pipe 42. A slider 431 is fixed to the middle part of the side wall of the movable plate 43. The slider 431 slides through the slide groove 421. A base 45 is fixed to the left side wall of the discharge pipe 42. The base of the electric cylinder 46 is installed on the base 45. The telescopic end of the electric cylinder 46 is connected to the slider 431.

[0095] In the present invention, under normal working conditions, the cover plate 44 blocks the discharge port 411, and the MBBR biological filler 13 discharged from the discharge barrel 31 can pass through the reflux pipe 41 into the water outlet chamber 211 for circulation. When the MBBR biological filler 13 in the equipment needs to be replaced, the electric cylinder 46 works to push the slider 431 to move upward, and the upward movement of the slider 431 drives the moving plate 43 to move upward, and the upward movement of the moving plate 43 pushes the cover plate 44 to move upward, and the cover plate 44 moves upward to expose the discharge port 411. At the same time, the upper part of the moving plate 43 blocks the left cavity of the reflux pipe 41, so that the MBBR biological filler 13 discharged from the discharge barrel 31 enters the reflux pipe 41, and then enters the discharge pipe 42 through the discharge port 411, and is discharged from the discharge pipe 42. New MBBR biological filler 13 can be added through the feed port 212. When replacing the MBBR biological filler 13, the entire equipment does not need to be shut down.

[0096] like Figure 2 , Figure 5 , Figure 7 and Fig.13 As shown, the air delivery mechanism 5 includes an air pump 51, the air outlet end of the air pump 51 is connected to a gas main pipe 52, the end of the gas main pipe 52 away from the air pump 51 is respectively connected to a first gas branch pipe 53 and a second gas branch pipe 54 through a three-way joint, the first gas branch pipe 53 and the second gas branch pipe 54 are both connected to a rotary joint 55 at one end away from the gas main pipe 52, the first gas branch pipe 53 is connected to the upper end of the first hollow rotating shaft 24 through the rotary joint 55, and the second gas branch pipe 54 is connected to the second hollow rotating shaft 34 through the rotary joint 55.

[0097] The lower end of the first hollow rotating shaft 24 rotates to penetrate the bottom wall of the water filtering net cylinder 22 and extend into the treatment tank 1. The bottom end of the first hollow rotating shaft 24 is connected to a first connecting pipe 29. The inner cavity of the first connecting pipe 29 is connected to the inner cavity of the first hollow rotating shaft 24. The left and right sides of the bottom end of the first connecting pipe 29 are connected to first aeration pipes 291. The upper side of the first aeration pipe 291 is evenly spaced with first air nozzles.

[0098] The air in the first hollow rotating shaft 24 enters the first aeration pipe 291 through the first connecting pipe 29 and is ejected by the first air nozzle on the first aeration pipe 291 to provide oxygen;

[0099] The first connecting pipe 29 and the first aeration pipe 291 are in the cylindrical cavity 11. The first hollow shaft 24 rotates while driving the first aeration pipe 291 to rotate. The first aeration pipe 291 rotates to stir the sewage and MBBR biological filler 13 in the cylindrical cavity 11, making their contact more complete and improving the oxygen supply effect.

[0100] The lower end of the second hollow rotating shaft 34 extends out of the conveying pipe 33, and the left and right sides of the bottom end of the second hollow rotating shaft 34 are connected to second connecting pipes 37, the inner cavity of the second connecting pipe 37 is connected to the inner cavity of the second hollow rotating shaft 34, and the end of the second connecting pipe 37 away from the second hollow rotating shaft 34 is connected to a second aeration pipe 38, and second air nozzles are installed on the second aeration pipe 38 at equal intervals;

[0101] The air passes through the second hollow rotating shaft 34 and enters the second connecting pipe 37, then enters the second aeration pipe 38, and is ejected from the second air nozzle thereon to provide oxygen;

[0102] The second connecting pipe 37 and the second aeration pipe 38 are located in the conical cavity 12. The rotation of the second hollow shaft 34 drives the second aeration pipe 38 to rotate, stirring the water flow in the conical cavity 12 and causing the sewage in the conical cavity 12 to collide with the sewage in the columnar cavity 11, thereby improving the contact effect between the sewage and the MBBR biological filler 13 and improving the oxygen supply effect.

[0103] The surface of the second hollow rotating shaft 34 is provided with air outlet holes 341 at equal intervals.

[0104] In the present invention, the air pump 51 works to input air into the first air delivery branch pipe 53 and the second air delivery branch pipe 54 through the air delivery main pipe 52, and then the air enters the first hollow shaft 24 and the second hollow shaft 34 respectively. The air in the first hollow shaft 24 enters the first aeration pipe 291 through the first connecting pipe 29 and is sprayed out by the first air nozzle on the first aeration pipe 291 to supply oxygen. The air in the second hollow shaft 34 enters the second aeration pipe 38 through the second connecting pipe 37 and is sprayed out by the second air nozzle thereon to supply oxygen. The first hollow shaft 24 rotates while driving the first aeration pipe 291 to rotate. The first aeration pipe 291 rotates to stir the sewage and MBBR biological filler 13 in the cylindrical cavity 11, and the second hollow shaft 34 rotates to stir the sewage and MBBR biological filler 13 in the cylindrical cavity 11. The rotation of the rotating shaft 34 drives the second aeration tube 38 to rotate, stirring the water flow in the conical cavity 12, and making the sewage in the conical cavity 12 collide with the sewage in the cylindrical cavity 11, thereby improving the contact effect between the sewage and the MBBR biological filler 13 and making the contact more complete. At the same time, the first aeration tube 291 and the second aeration tube 38 rotate while aerating, and improving the oxygen supply effect, so that the air and the MBBR biological filler 13 are fully and completely in contact. During the process of the third spiral blade 35 transporting water and MBBR biological filler 13 upward, air is ejected from the air outlet 341 on the second hollow rotating shaft 34 to supply oxygen to the MBBR biological filler 13, thereby ensuring the oxygen supply effect, thereby maintaining the sewage treatment effect of the MBBR biological filler 13.

[0105] like Figures 1 to 13 As shown, a sewage treatment method of a sewage treatment equipment for environmental protection engineering includes the following specific steps:

[0106] Step 1: Add the MBBR biological filler 13 into the water outlet chamber 211 through the feed port 212 on the outer cylinder 21, and connect the water inlet pipe 23 to the external sewage pipe;

[0107] Step 2: Sewage enters the water filter cylinder 22 through the water inlet pipe 23, and water molecules in the sewage enter the water outlet chamber 211 through the mesh of the water filter cylinder 22, and come into contact with the MBBR biological filler 13. The MBBR biological filler 13 purifies the sewage, and then the water and the MBBR biological filler 13 fall into the cylindrical cavity 11 in the treatment tank 1 along the second spiral blade 27 in the water outlet chamber 211, and the large particles of impurities in the sewage in the water filter cylinder 22 are intercepted by the water filter cylinder 22;

[0108] Step 3: The first servo motor 281 drives the first driven gear 282 to rotate through the first driving gear 283, and the first driven gear 282 drives the first hollow shaft 24 to rotate, and the first hollow shaft 24 drives the first spiral blade 25 to rotate, and the first spiral blade 25 rotates to transport the impurities intercepted at the bottom of the water filter net cylinder 22 upward to the sewage cylinder 26, and then discharge them from the sewage pipe 261, so as to filter the sewage and discharge the impurities generated by the filtration at the same time;

[0109] Step 4: The sewage and MBBR biological filler 13 in the cylindrical cavity 11 are mixed and enter the conical cavity 12. At the same time, the air pump 51 works to input air into the first gas branch pipe 53 and the second gas branch pipe 54 through the gas main pipe 52, and then the air enters the first hollow shaft 24 and the second hollow shaft 34 respectively. The air in the first hollow shaft 24 enters the first aeration pipe 291 through the first connecting pipe 29 and is sprayed out by the first air nozzle on the first aeration pipe 291 to supply oxygen. The air in the second hollow shaft 34 enters the second aeration pipe 38 through the second connecting pipe 37 and is sprayed out by the second air nozzle thereon to supply oxygen. The first hollow shaft 24 rotates while driving the first aeration pipe 291 to rotate. The first aeration pipe 291 rotates to stir the sewage and MBBR biological filler 13 in the cylindrical cavity 11, so that the contact is more complete and the oxygen supply effect is improved.

[0110] Step 5: The second servo motor 361 drives the second driven gear 362 to rotate through the second driving gear 363, and the second driven gear 362 rotates to drive the second hollow shaft 34 to rotate, and the second hollow shaft 34 rotates to drive the second aeration tube 38 to rotate, stirring the water flow in the conical cavity 12, and making the sewage in the conical cavity 12 collide with the sewage in the cylindrical cavity 11, thereby improving the contact effect between the sewage and the MBBR biological filler 13 and improving the oxygen supply effect. At the same time, the second hollow shaft 34 rotates to drive the third spiral blade 35 to rotate, and the third spiral blade 35 rotates to transport the water in the conical cavity 12 and the MBBR biological filler 13 upward;

[0111] Step 6: When the third spiral blade 35 transports the water and the MBBR biological filler 13 upward, air is ejected from the air outlet 341 on the second hollow shaft 34 to supply oxygen to the MBBR biological filler 13. When the third spiral blade 35 rotates to transport the water and the MBBR biological filler 13 to the water filter mesh pipe 323 in the drainage box 321, the treated water falls into the drainage cavity 322 through the water filter mesh pipe 323 and is finally discharged through the drainage pipe 324.

[0112] Step 7: The third spiral blade 35 continues to rotate, and continues to transport the MBBR biological filler 13 upward, transports the MBBR biological filler 13 into the discharge barrel 31, and then flows back into the water outlet chamber 211 through the reflux pipe 41, contacts with the newly entered sewage to purify the sewage, and the MBBR biological filler 13 can circulate in the overall process;

[0113] Step eight: When the MBBR biological filler 13 in the equipment needs to be replaced, the electric cylinder 46 works to push the slider 431 upward, and the upward movement of the slider 431 drives the moving plate 43 to move upward, and the moving plate 43 moves the cover plate 44 upward to expose the discharge port 41. At the same time, the upper part of the moving plate 43 blocks the left cavity of the reflux pipe 41, so that the MBBR biological filler 13 discharged from the discharge barrel 31 enters the reflux pipe 41, and then enters the discharge pipe 42 through the discharge port 411 and is discharged from the discharge pipe 42. New MBBR biological filler 13 can be added through the feed port 212. When replacing the MBBR biological filler 13, the entire equipment does not need to be shut down.

[0114] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A sewage treatment equipment for environmental protection engineering, characterized in that: include: A treatment tank (1), wherein a through columnar cavity (11) and a conical cavity (12) are provided in the treatment tank (1), and the interior of the treatment tank (1) is filled with a plurality of MBBR biological fillers (13); A filter mechanism (2), the filter mechanism (2) being mounted on the upper left side of the treatment tank (1), the filter mechanism (2) comprising an outer cylinder (21) and a water filter cylinder (22), a water inlet pipe (23) being connected to the lower side wall of the water filter cylinder (22), a first hollow rotating shaft (24) and a first spiral blade (25) being provided inside the water filter cylinder (22), a sewage discharge cylinder (26) being fixed to the top of the outer cylinder (21), and a first driving assembly (28) for driving the first hollow rotating shaft (24) to rotate being provided on the outer cylinder (21); A water outlet mechanism (3), the water outlet mechanism (3) being mounted on the upper right portion of the treatment tank (1), the water outlet mechanism (3) comprising a discharge cylinder (31), a drainage assembly (32) and a delivery pipe (33) which are connected in sequence, a second hollow rotating shaft (34) and a third spiral blade (35) being nested inside the delivery pipe (33), air outlet holes (341) being arranged at equal intervals on the surface of the second hollow rotating shaft (34), and a second driving assembly (36) for driving the second hollow rotating shaft (34) to rotate being provided on the drainage assembly (32); A discharge mechanism (4), the discharge mechanism (4) comprising a return pipe (41), the two ends of the return pipe (41) being respectively connected to the discharge cylinder (31) and the outer cylinder (21), the lower middle part of the return pipe (41) being connected to a discharge pipe (42), and the discharge pipe (42) being provided with a switching assembly; An air supply mechanism (5), the air supply mechanism (5) being connected to the first hollow rotating shaft (24) and the second hollow rotating shaft (34) respectively; The lower end of the delivery pipe (33) passes through the top wall of the processing tank (1) and extends into the conical cavity (12); The drainage assembly (32) comprises a drainage box (321), a drainage pipe (324) is provided at the lower right part of the drainage box (321), a drainage cavity (322) is provided in the drainage box (321), a water filter mesh pipe (323) is provided at the left part of the drainage cavity (322), upper and lower end edges of the water filter mesh pipe (323) are connected to upper and lower side walls of the drainage cavity (322), the water filter mesh pipe (323) is located between the discharge cylinder (31) and the delivery pipe (33), the inner cavities of the water filter mesh pipe (323), the discharge cylinder (31) and the delivery pipe (33) are of the same diameter, and the inner cavity of the water filter mesh pipe (323) is connected to the inner cavities of the discharge cylinder (31) and the delivery pipe (33); The upper end of the second hollow rotating shaft (34) passes through the water filtering mesh tube (323) and the top wall of the discharge cylinder (31) in sequence, and the upper end of the third spiral blade (35) passes through the water filtering mesh tube (323) and extends into the discharge cylinder (31); The second driving assembly (36) comprises a second servo motor (361) and a second driven gear (362); the second driven gear (362) is fixedly sleeved on the upper end of the second hollow rotating shaft (34); the second servo motor (361) is mounted on the drainage box (321); the output end of the second servo motor (361) is connected to a second driving gear (363); the second driving gear (363) is meshingly connected to the second driven gear (362); A discharge port (411) is provided on the bottom wall of the inner cavity of the return pipe (41) at a position corresponding to the discharge pipe (42), and the inner cavity of the discharge pipe (42) is connected to the inner cavity of the return pipe (41) through the discharge port (411); The switching assembly comprises an electric cylinder (46) and a movable plate (43) slidably arranged on the left side wall of the inner cavity of the discharge pipe (42); the upper end of the movable plate (43) passes through the discharge port (411) and extends into the inner cavity of the return pipe (41); a cover plate (44) is fixed to the upper end of the movable plate (43); the size of the cover plate (44) is larger than the size of the discharge port (411); a slide groove (421) is provided on the upper part of the left side wall of the discharge pipe (42); a slider (431) is fixed to the middle part of the side wall of the movable plate (43); the slider (431) slides through the slide groove (421); a base (45) is fixed to the left side wall of the discharge pipe (42); the base of the electric cylinder (46) is mounted on the base (45); and the telescopic end of the electric cylinder (46) is connected to the slider (431).

2. The sewage treatment equipment for environmental protection engineering according to claim 1 is characterized by: The water filter net cylinder (22) is nested in the outer cylinder (21); the top edge of the water filter net cylinder (22) is fixedly connected to the top inner wall of the outer cylinder (21); a water outlet cavity (211) is provided between the water filter net cylinder (22) and the outer cylinder (21); the water outlet cavity (211) is connected to the inner cavity of the treatment tank (1); A second spiral blade (27) is fixedly sleeved on the outer side of the water filter net cylinder (22), and the outer end of the second spiral blade (27) is connected to the inner wall of the outer cylinder body (21); The inner cavity of the sewage discharge cylinder (26) is connected to the inner cavity of the water filter net cylinder (22), and the side wall of the sewage discharge cylinder (26) is connected to a sewage discharge pipe (261); The upper end of the first hollow rotating shaft (24) extends into the sewage barrel (26) and rotates to penetrate the top wall of the sewage barrel (26); the first spiral blade (25) is fixedly sleeved on the first hollow rotating shaft (24); the upper end of the first spiral blade (25) extends into the sewage barrel (26); and a plurality of water filtering holes (251) are formed on the first spiral blade (25); One end of the water inlet pipe (23) away from the water filter net cylinder (22) penetrates the side wall of the outer cylinder (21) and extends out of the outer cylinder (21); A feed port (212) is installed at the upper front portion of the outer cylinder (21); The first driving assembly (28) comprises a first servo motor (281) and a first driven gear (282); the first driven gear (282) is fixedly sleeved on the upper end of the first hollow rotating shaft (24); the first servo motor (281) is mounted on the top of the outer cylinder (21); the output end of the first servo motor (281) is connected to a first driving gear (283); the first driving gear (283) is meshingly connected to the first driven gear (282).

3. The sewage treatment equipment for environmental protection engineering according to claim 2 is characterized by: The lower end of the first hollow rotating shaft (24) rotates to penetrate the bottom wall of the water filter net cylinder (22) and extend into the treatment tank (1); the bottom end of the first hollow rotating shaft (24) is connected to a first connecting pipe (29); the inner cavity of the first connecting pipe (29) is connected to the inner cavity of the first hollow rotating shaft (24); the left and right sides of the bottom end of the first connecting pipe (29) are connected to first aeration pipes (291); and first air nozzles are installed at equal intervals on the upper side of the first aeration pipe (291); The first connecting pipe (29) and the first aeration pipe (291) are located in the cylindrical cavity (11).

4. The sewage treatment equipment for environmental protection engineering according to claim 3 is characterized by: The lower end of the second hollow rotating shaft (34) extends out of the conveying pipe (33); the left and right sides of the bottom end of the second hollow rotating shaft (34) are connected to second connecting pipes (37); the inner cavity of the second connecting pipe (37) is connected to the inner cavity of the second hollow rotating shaft (34); the end of the second connecting pipe (37) away from the second hollow rotating shaft (34) is connected to a second aeration pipe (38); and second air nozzles are installed on the second aeration pipe (38) at equal intervals; The second connecting pipe (37) and the second aeration pipe (38) are located in the conical cavity (12).

5. The sewage treatment equipment for environmental protection engineering according to claim 4 is characterized by: The inner cavity of the return pipe (41) is respectively connected to the water outlet cavity (211) and the inner cavity of the discharge barrel (31), and the height of the connection between the return pipe (41) and the outer barrel (21) is lower than the height of the connection between the return pipe (41) and the discharge barrel (31).

6. The sewage treatment equipment for environmental protection engineering according to claim 5, characterized in that: The air delivery mechanism (5) comprises an air pump (51); an air outlet end of the air pump (51) is connected to a gas main pipe (52); an end of the gas main pipe (52) away from the air pump (51) is respectively connected to a first gas branch pipe (53) and a second gas branch pipe (54) via a three-way joint; ends of the first gas branch pipe (53) and the second gas branch pipe (54) away from the gas main pipe (52) are both connected to a rotary joint (55); the first gas branch pipe (53) is connected to an upper end of a first hollow rotating shaft (24) via the rotary joint (55); and the second gas branch pipe (54) is connected to a second hollow rotating shaft (34) via the rotary joint (55).

7. The sewage treatment equipment for environmental protection engineering according to claim 6, characterized in that: The height of the inner wall of the bottom of the conical cavity (12) is lower than the height of the cylindrical cavity (11), and a discharge pipe is provided at the bottom of the right side of the processing tank (1), and a valve is installed on the discharge pipe.

8. A sewage treatment method according to any one of claim 7, characterized in that: The specific steps include: Step 1: Add the MBBR biological filler (13) into the water outlet chamber (211) through the feed port (212) on the outer cylinder (21), and connect the water inlet pipe (23) to the external sewage pipe; Step 2: Sewage enters the water filter cylinder (22) through the water inlet pipe (23), and water molecules in the sewage enter the water outlet chamber (211) through the mesh of the water filter cylinder (22), and come into contact with the MBBR biological filler (13). The MBBR biological filler (13) purifies the sewage, and then the water and the MBBR biological filler (13) fall into the cylindrical chamber (11) in the treatment tank (1) along the second spiral blade (27) in the water outlet chamber (211), and large particles of impurities in the sewage in the water filter cylinder (22) are intercepted by the water filter cylinder (22); Step 3: The first servo motor (281) works to drive the first driven gear (282) to rotate via the first driving gear (283), the first driven gear (282) rotates to drive the first hollow rotating shaft (24), the first hollow rotating shaft (24) rotates to drive the first spiral blade (25), the first spiral blade (25) rotates to transport impurities intercepted at the bottom of the water filter net cylinder (22) upward to the sewage discharge cylinder (26), and then discharge them from the sewage discharge pipe (261), thereby filtering the sewage and simultaneously discharging the impurities generated by the filtration; Step 4: The sewage and the MBBR biological filler (13) in the cylindrical cavity (11) are mixed and enter the conical cavity (12). At the same time, the air pump (51) works to input air into the first gas branch pipe (53) and the second gas branch pipe (54) through the gas main pipe (52). Then, the air enters the first hollow rotating shaft (24) and the second hollow rotating shaft (34) respectively. The air in the first hollow rotating shaft (24) enters the first aeration pipe (291) through the first connecting pipe (29). The first air nozzle on the aeration pipe (291) sprays out air to supply oxygen, and the air in the second hollow rotating shaft (34) enters the second aeration pipe (38) through the second connecting pipe (37) and is sprayed out by the second air nozzle thereon to supply oxygen. The first hollow rotating shaft (24) rotates while driving the first aeration pipe (291) to rotate. The first aeration pipe (291) rotates to stir the sewage and the MBBR biological filler (13) in the cylindrical cavity (11), so that the sewage and the MBBR biological filler (13) are in contact with each other more completely, thereby improving the oxygen supply effect. Step 5: The second servo motor (361) works to drive the second driven gear (362) to rotate through the second driving gear (363), and the rotation of the second driven gear (362) drives the second hollow rotating shaft (34) to rotate, and the rotation of the second hollow rotating shaft (34) drives the second aeration pipe (38) to rotate, thereby stirring the water flow in the conical cavity (12) and causing the sewage in the conical cavity (12) and the sewage in the cylindrical cavity (11) to collide with each other, thereby improving the contact effect between the sewage and the MBBR biological filler (13) and improving the oxygen supply effect. At the same time, the rotation of the second hollow rotating shaft (34) drives the third spiral blade (35) to rotate, and the third spiral blade (35) rotates to transport the water in the conical cavity (12) and the MBBR biological filler (13) upward; Step 6: When the third spiral blade (35) transports the water and the MBBR biological filler (13) upward, air is ejected from the air outlet (341) on the second hollow rotating shaft (34) to supply oxygen to the MBBR biological filler (13). When the third spiral blade (35) rotates to transport the water and the MBBR biological filler (13) to the water filter mesh pipe (323) in the drainage box (321), the treated water falls into the drainage cavity (322) through the water filter mesh pipe (323) and is finally discharged through the drainage pipe (324); Step 7: The third spiral blade (35) continues to rotate, and continues to transport the MBBR biological filler (13) upward, transporting the MBBR biological filler (13) into the discharge barrel (31), and then flowing back into the water outlet chamber (211) through the return pipe (41), contacting with the newly entered sewage to purify the sewage, and the MBBR biological filler (13) can circulate in the overall process; Step 8: When the MBBR biological filler (13) in the equipment needs to be replaced, the electric cylinder (46) works to push the slider (431) upward, and the upward movement of the slider (431) drives the movable plate (43) to move upward, and the upward movement of the movable plate (43) pushes the cover plate (44) to move upward, and the cover plate (44) moves upward to expose the discharge port (411). At the same time, the upper part of the movable plate (43) blocks the left cavity of the return pipe (41), so that the MBBR biological filler (13) discharged from the discharge barrel (31) enters the return pipe (41), and then enters the discharge pipe (42) through the discharge port (411), and is discharged from the discharge pipe (42). New MBBR biological filler (13) can be added through the feed port (212). When replacing the MBBR biological filler (13), the entire equipment does not need to be shut down.

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