CN115784342A - Sewage treatment device based on bioengineering principle - Google Patents

Abstract

The invention discloses sewage treatment equipment based on a bioengineering principle, which comprises a treatment equipment main body, a reaction tank and a sedimentation tank, wherein a filter tank is arranged inside the left end of the treatment equipment main body, the reaction tank is arranged in the middle of the treatment equipment main body, the sedimentation tank is arranged at the right end of the treatment equipment main body, and the upper end of the filter tank is connected with a water inlet pipe. This sewage treatment device based on bioengineering principle, can filter its great debris that carry in sewage department of intaking through setting up filtration, and provide power through rivers, the rotatory automation that drives the scraper blade is cleared up and is collected debris collection, can prevent when improving the convenience of use that debris from piling up and causing the jam, simultaneously through high-pressure gas as power, it is rotatory that two sets of puddler equidirectional from top to bottom to drive, two sets of puddlers of crisscross setting can be in step to the piece of flocculating smashing, increase the reaction effect of microorganism and sewage, improve the treatment effeciency of this equipment to sewage.

Description

A sewage treatment equipment based on the principle of bioengineering

technical field

The invention relates to the technical field of sewage treatment, in particular to sewage treatment equipment based on the principle of bioengineering.

Background technique

Biological sewage treatment can be applied to many types of sewage treatment such as petroleum, petrochemical, chemical, metallurgy, machinery, leather, coal gasification, food, brewing, daily chemical, printing and dyeing, pharmaceutical, papermaking and urban sewage, as well as large areas of water such as rivers and lakes. Sewage treatment: In the scope of bioengineering sewage treatment, activated sludge sewage treatment method is a relatively common sewage treatment method, mainly mixing activated sludge into sewage, and then promoting the reaction by increasing oxygen in the mixture, Then the effect of sewage treatment is achieved, but there are still certain problems in the existing biological sewage treatment equipment.

However, when the existing sewage treatment equipment is in use, there are still certain problems:

Existing Chinese Patent Publication No. CN207511913U is a kind of sewage treatment system based on activated sludge, the treatment tank is provided with a vertically arranged first partition and a second partition, the first partition and the second partition are arranged in parallel and The two separate the treatment pool into a first cavity, a second cavity, and a third cavity arranged in sequence. The first cavity and the second cavity are connected through the first liquid port and the overflow port, and the second cavity and the second cavity are connected. The third chamber communicates with the flushing liquid port through the second chamber, and the second chamber is equipped with an activated sludge layer, an aeration pipe, and a stirring device; At the same time, large debris is easy to accumulate and cause blockage, and there are many dead ends in the stirring structure of the existing sewage treatment equipment, the stirring effect is poor, the stirring is uneven, and the flocs cannot be crushed , so that the reaction efficiency is poor, and the efficiency of sewage treatment is low.

In view of the above problems, an innovative design is carried out on the basis of the original sewage treatment equipment based on the principle of bioengineering.

Contents of the invention

The purpose of the present invention is to provide a kind of sewage treatment equipment based on the principle of bioengineering to solve the problem that the existing sewage treatment equipment in the above background technology cannot filter the large sundries carried by the sewage, and the stirring effect is poor, and the stirring is not good. Evenly, the flocs cannot be crushed, and the efficiency of sewage treatment is low.

In order to achieve the above object, the present invention provides the following technical solutions: a sewage treatment equipment based on the principle of bioengineering, including the main body of the treatment equipment, a reaction tank and a sedimentation tank:

A filter pool is provided inside the left end of the main body of the processing equipment, and a reaction pool is provided in the middle of the main body of the processing equipment;

The right end of the main body of the processing equipment is provided with a sedimentation tank, the upper end of the filter tank is connected to a water inlet pipe, and the inside of the filter tank is provided with a first conduction pipe;

The first water pump is connected to the upper end of the first conduction pipe, and the right end of the first water pump is connected to the reaction tank, the second conduction pipe is connected to the bottom end of the reaction tank, and the second conduction pipe is connected to the upper end of the second conduction pipe. Two water pumps, and the right end of the second water pump is conductively connected with the sedimentation tank;

An outlet pipe is connected to the upper right side of the sedimentation tank, and a mud discharge pipe is connected to the lower right side of the sedimentation tank;

An air pump is installed at the lower end of the main body of the processing equipment, and a square pipe is connected to the left end of the air pump, and a check valve is connected to the upper end of the square pipe;

An aeration tube runs through the inside of the reaction tank, and the lower end of the aeration tube is connected to the reaction tank through a sealed bearing, the lower end of the aeration tube is connected to the check valve, and the outer array of the aeration tube is provided with aeration holes. And the aeration pipe and the check valve are connected by sealed bearings.

Preferably, a filter screen is fixedly installed on the upper end of the filter tank, and an annular baffle is connected to the upper end of the filter screen, and a miscellaneous hole is provided on the rear side of the filter screen;

The lower end of the miscellaneous discharge hole is provided with a diversion square groove, and the upper end of the diversion square groove is fixedly connected with the filter screen, and the diversion square groove penetrates to the outside of the filter pool.

By adopting the above-mentioned technical scheme, the installation of the filter screen can filter the larger debris inside the sewage treatment equipment when it enters the interior, and remove the debris from the outside of the equipment through the miscellaneous discharge holes and the diversion square groove.

Preferably, the first conduction pipe is designed in a square structure, and a first impeller is arranged inside the first conduction pipe, the left end of the first conduction pipe is fixedly connected with a fixing plate, and the inner bearing of the fixing plate is connected with A worm, and the right end of the worm penetrates to the inside of the first conduit and is fixedly connected to the first impeller.

With the above technical solution, by setting the first impeller inside the first conduction pipe, when the first water pump starts to pump the liquid inside the filter tank, the liquid flows inside the first conduction pipe to drive the first impeller and the worm to rotate synchronously .

Preferably, the internal bearing of the filter screen is connected with a first transmission rod, and the lower end of the first transmission rod penetrates to the inside of the fixing plate, and the lower end of the first transmission rod is keyed to a worm gear, and the worm gear is meshed with the worm;

A scraper is connected to the upper end of the first transmission rod, and there are four sets of scraper arrays, and the lower end of the scraper is in contact with the upper surface of the filter.

With the above technical solution, the worm wheel and the first transmission rod are driven to rotate synchronously through the rotation of the worm, and when the first transmission rod rotates, it can drive multiple groups of scrapers to rotate, and then the debris accumulated on the top surface of the filter can be scraped when the scrapers rotate. To the interior of the miscellaneous discharge hole, and then discharged to the outside of the equipment through the diversion square groove.

Preferably, the inside of the square tube is provided with a second impeller, and the upper end of the square tube is connected to a sealed bearing with a second transmission rod, and the lower end of the second transmission rod penetrates the inside of the square tube and is fixedly connected to the second impeller;

The upper end of the second transmission rod is key-connected with a driving gear, and the lower end of the aeration tube is connected with a driven gear, and the driving gear is engaged with the driven gear, and the diameter of the driving gear is smaller than that of the driven gear.

With the above technical solution, the high-pressure gas is delivered to the inside of the square tube by starting, and the second impeller is driven to rotate when the gas flows, and the second transmission rod and the driving gear are driven to rotate, and the driving gear can drive the driven gear to synchronize with the aeration tube turn.

Preferably, a movable plate is provided inside the reaction tank, and the movable plate is fixedly connected with the aeration pipe, and both the movable plate and the reaction tank are designed in a circular structure, and the upper end of the movable plate is connected with a first stirring rod, and the There are four groups of first stirring rods, and the array of first stirring rods is arranged on the upper surface of the movable plate.

With the above technical scheme, through the setting of the circular movable plate, when the aeration pipe rotates, the movable plate and the first stirring rod are driven to rotate, and then the sewage inside the reaction tank is stirred to improve the reaction effect of sewage and activated sludge , improve the efficiency of sewage treatment.

Preferably, a movable groove is provided inside the movable plate, and a sliding plate is slidably connected to the movable groove, a spring is arranged inside the movable groove, and both ends of the spring are fixedly connected to the inner wall of the movable groove and the sliding plate;

The outer bolts of the sliding plate are connected with a scraper, and the outer end surface of the scraper is in contact with the inner wall of the reaction pool.

With the above technical scheme, the internal sliding plate can drive the scraper to move through the setting of the movable groove, and the spring provided inside the movable groove pushes the sliding plate to move outwards, so that the scraping strip can be kept in close contact with the inner wall of the reaction pool. When the movable plate At the same time, it can clean up the sludge and other sundries attached to the inner wall of the reaction tank.

Preferably, the bearing at the upper end of the aeration tube is connected with a movable casing, and the movable casing is fixedly connected with a mounting plate, the mounting plate is designed in a "ten" shape, and the lower end of the mounting plate is fixedly connected with a second stirring rod , and the second stirring rod is arranged alternately with the first stirring rod.

With the above technical solution, by setting the second stirring rod interlaced with the first stirring rod at the upper end of the reaction tank, the two groups of stirring rods can rotate in opposite directions, which not only improves the effect of stirring, but also improves the stirring effect of the two groups of stirring rods when they rotate first. The sludge coagulation clot inside the reaction tank is crushed, which is convenient to improve the reaction effect and the efficiency of sewage treatment.

Preferably, a fixed circular plate is fixedly installed on the top of the reaction pool, and the upper end of the movable sleeve is connected to the fixed circular plate bearing;

The upper end of the aeration tube is key-connected with a first gear, the lower end of the fixed circular plate is shaft-connected with a second gear, and the second gear is meshed with the first gear;

A gear ring is fixedly connected inside the movable sleeve, and the gear ring is engaged with the second gear.

With the above technical solution, the aeration tube drives the first gear to rotate synchronously, and the second gear drives the gear ring and the movable sleeve to rotate in reverse, and then drives the second stirring rod to rotate reversely through the mounting plate, and the second stirring rod The cooperation with the first stirring rod improves the stirring effect and crushes the flocs.

Compared with the prior art, the beneficial effect of the present invention is: the sewage treatment equipment based on the principle of bioengineering can filter the large debris carried by the sewage at the sewage inlet by setting the filtering structure, and provide power through the water flow , to drive the rotation of the scraper to automatically clean and collect the collected sundries, improve the convenience of use and prevent the accumulation of sundries and cause blockage. The two sets of stirring rods can simultaneously pulverize the flocs, increase the reaction effect between microorganisms and sewage, and improve the treatment efficiency of the equipment for sewage.

1. The first water pump is started to drive the water flow inside the first guide pipe, and the first impeller is driven to provide power and drive the worm to rotate. The cooperation between the worm and the worm drives the first transmission rod and the scraper to rotate synchronously. The filter screen scrapes the residual debris from sewage filtration to the inside of the miscellaneous discharge hole, and discharges it out of the equipment through the diversion square groove. There is no need to manually clean the filter screen, which is more convenient to use, and the water flow is used as the power source to reduce the cost of use, and it can also Prevent the filter from clogging;

2. Provide high-pressure gas through the air pump. When the high-pressure gas flows from the inside of the square tube, it drives the second impeller and the second transmission rod to rotate, and the aeration tube is driven to rotate through the cooperation of the driving gear and the driven gear. The rotation of the aeration tube can Drive the two sets of stirring rods to rotate in opposite directions, which can improve the uniformity of stirring, and during the rotation process, the two sets of stirring rods should be arranged alternately, which can crush the flocs produced by the sewage reaction, improve the effect of the reaction between microorganisms and sewage, and then Improve the efficiency of sewage treatment.

Description of drawings

Fig. 1 is the front view sectional structure schematic diagram of the present invention;

Fig. 2 is the structure schematic diagram of filter screen and miscellaneous hole of the present invention;

Fig. 3 is the structural representation of worm screw and worm gear of the present invention;

Fig. 4 is a schematic view of the structure of the square tube and the second impeller of the present invention;

Fig. 5 is a structural schematic diagram of the movable plate and the first stirring rod of the present invention;

Fig. 6 is a structural schematic diagram of the mounting plate and the second stirring rod of the present invention;

Fig. 7 is a schematic diagram of the structure of the aeration tube and the first gear of the present invention;

Figure 8 is a schematic diagram of the enlarged structure at A in Figure 1 of the present invention;

FIG. 9 is a schematic diagram of the enlarged structure at B in FIG. 5 of the present invention.

In the figure: 1. The main body of the processing equipment; 2. The filter tank; 3. The reaction tank; 4. The sedimentation tank; 5. The water inlet pipe; 6. The first guide pipe; 7. The first water pump; ; 9, the second water pump; 10, the water outlet pipe; 11, the mud discharge pipe; 12, the filter screen; 13, the annular baffle; Fixed plate; 18, worm; 19, first transmission rod; 20, worm gear; 21, air pump; 22, square pipe; 23, check valve; 24, aeration pipe; 25, aeration hole; 26, second impeller ; 27, the second transmission rod; 28, driving gear; 29, driven gear; 30, movable plate; 31, the first stirring rod; 32, movable groove; 33, sliding plate; 34, spring; 35, scraping bar; 36, movable casing; 37, mounting plate; 38, second stirring rod; 39, fixed circular plate; 40, first gear; 41, second gear; 42, gear ring; 43, scraper.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-9, the present invention provides a technical solution: a sewage treatment equipment based on the principle of bioengineering, including a treatment equipment main body 1, a reaction tank 3 and a sedimentation tank 4, and a filter tank is provided inside the left end of the treatment equipment main body 1 2. A reaction pool 3 is provided in the middle of the processing equipment main body 1, a sedimentation tank 4 is provided at the right end of the processing equipment main body 1, a water inlet pipe 5 is connected to the upper end of the filter tank 2, and a first conduction pipe 6 is arranged inside the filter tank 2. A first water pump 7 is connected to the upper end of a conduction pipe 6, and the right end of the first water pump 7 is electrically connected to the reaction pool 3, the bottom end of the reaction pool 3 is connected to a second conduction pipe 8, and the upper end of the second conduction pipe 8 is connected to There is a second water pump 9, and the right end of the second water pump 9 is conductively connected with the sedimentation tank 4, the upper end of the right side of the sedimentation tank 4 is connected with an outlet pipe 10, and the lower end of the right side of the sedimentation tank 4 is connected with a mud discharge pipe 11; the sewage passes through the water inlet pipe 5 enters the filter pool 2, and filters the large impurities contained in the sewage to improve the treatment efficiency. The filtered sewage is transported to the inside of the reaction pool 3 through the first conduction pipe 6 and the first water pump 7. By adding active The sludge is subjected to reaction treatment, and the treated sewage is transported to the sedimentation tank 4 through the second conduit 8 and the second water pump 9 for further treatment. After the precipitation is completed, the clear water is discharged through the outlet pipe 10, and the settled sludge is discharged through the sludge discharge pipe 11 discharge.

The filter screen 12 is fixedly installed on the upper end of the filter pool 2, and the upper end of the filter screen 12 is connected with an annular baffle 13, and the rear side of the filter screen 12 is provided with a miscellaneous hole 14; the lower end of the miscellaneous hole 14 is provided with a diversion square groove 15, and The upper end of the diversion square groove 15 is fixedly connected with the filter screen 12, and the diversion square groove 15 penetrates to the outside of the filter pool 2; the first conduction pipe 6 is designed in a square structure, and the first conduction pipe 6 is provided with a first impeller inside 16. The left end of the first conduction pipe 6 is fixedly connected with a fixed plate 17, the internal bearing of the fixed plate 17 is connected with a worm 18, and the right end of the worm 18 penetrates to the inside of the first conduction pipe 6 and is fixedly connected with the first impeller 16; through the filter The setting of 12 can filter the sewage discharged from the water inlet pipe 5, and filter the larger debris contained in it; the residual debris after filtering can be discharged to the outside of the equipment through the miscellaneous discharge hole 14 and the diversion square groove 15 for collection , It is more convenient to use, and there is no need to manually process the sundries on the filter screen 12.

The first conduction pipe 6 is designed in a square structure, and the inside of the first conduction pipe 6 is provided with a first impeller 16, the left end of the first conduction pipe 6 is fixedly connected with a fixed plate 17, and the inner bearing of the fixed plate 17 is connected with a worm 18, And the right end of the worm 18 penetrates to the inside of the first conduction pipe 6 and is fixedly connected with the first impeller 16; the inner bearing of the filter screen 12 is connected with the first transmission rod 19, and the lower end of the first transmission rod 19 penetrates to the inside of the fixed plate 17, the first The lower end of the transmission rod 19 is key-connected with the worm wheel 20, and the worm gear 20 is meshed with the worm 18; The upper surface is in contact; when the first water pump 7 is started, the sewage inside the filter tank 2 is transported through the first conduction pipe 6, and when the sewage flows inside the first conduction pipe 6, the first impeller 16 and the worm 18 can be driven synchronously Rotate, drive the worm wheel 20 and the first transmission rod 19 to rotate through the worm 18, and drive multiple groups of scrapers 43 to rotate through the first transmission rod 19 to scrape the sundries left on the upper surface of the filter screen 12 to the inside of the miscellaneous discharge hole 14, improving the use of The convenience reduces the labor intensity, and at the same time, it can prevent the filter screen 12 from clogging and ensure the filtering effect.

An air pump 21 is installed at the lower end of the processing equipment main body 1, and a square pipe 22 is connected to the left end of the air pump 21, and a check valve 23 is connected to the upper end of the square pipe 22; an aeration pipe 24 runs through the inside of the reaction tank 3, and the lower end of the aeration pipe 24 is connected to the reaction tank. The pool 3 is connected by a sealed bearing, the lower end of the aeration pipe 24 is conductively connected with the check valve 23, and the outer array of the aeration pipe 24 is provided with aeration holes 25, and the aeration pipe 24 and the check valve 23 are connected by a sealed bearing; When the air pump 21 is started, the high-pressure gas can be delivered to the inside of the aeration pipe 24 through the square pipe 22, and mixed with the sewage discharged from the aeration hole 25; the second impeller 26 is arranged inside the square pipe 22, and the upper end of the square pipe 22 is connected to There is a second transmission rod 27, the lower end of the second transmission rod 27 runs through the inside of the square tube 22 and is fixedly connected with the second impeller 26; the upper end of the second transmission rod 27 is key-connected with the driving gear 28, and the lower end of the aeration tube 24 is connected with the driven gear 29 , and the driving gear 28 is engaged with the driven gear 29, and the diameter of the driving gear 28 is smaller than the diameter of the driven gear 29; the inside of the reaction tank 3 is provided with a movable plate 30, and the movable plate 30 is fixedly connected with the aeration tube 24, and the movable plate 30 and the reaction tank 3 are designed with a circular structure, the upper end of the movable plate 30 is connected with the first stirring rod 31, the first stirring rod 31 is provided with four groups, and the array of the first stirring rods 31 is arranged on the upper end surface of the movable plate 30, when When the high-pressure gas flows inside the square tube 22, it can drive the second impeller 26 and the second transmission rod 27 to rotate, and the second transmission rod 27 drives the driving gear 28 to rotate. When the driving gear 28 rotates, it drives the driven gear 29 and the exposure gear. The air pipe 24 rotates, and the movable plate 30 and multiple sets of first stirring rods 31 are driven by the aeration pipe 24 to stir the sewage inside the reaction tank 3 to improve the reaction efficiency of the sewage.

The inside of movable plate 30 is provided with movable groove 32, and movable groove 32 inside is slidably connected with sliding plate 33, and movable groove 32 inside is provided with spring 34, and spring 34 two ends are respectively fixedly connected with movable groove 32 inwalls and sliding plate 33; The outer bolts of the plate 33 are connected with a scraper 35, and the outer end surface of the scraper 35 is in contact with the inner wall of the reaction pool 3; when the movable plate 30 rotates, the sliding plate 33 and the scraper 35 are driven to rotate synchronously, and the spring 34 pushes the sliding plate 33 to the movable groove 32 external activities, so that the scraper 35 can be closely attached to the inner wall of the reaction tank 3, and the inner wall of the reaction tank 3 is cleaned when the scraper 35 rotates, so as to prevent the inner wall of the reaction tank 3 from adhering to a large amount of sludge.

The bearing at the upper end of the aeration pipe 24 is connected with a movable casing 36, and the movable casing 36 is fixedly connected with a mounting plate 37 outside. , and the second stirring rod 38 is interlaced with the first stirring rod 31; the top of the reaction tank 3 is fixedly equipped with a fixed circular plate 39, and the upper end of the movable sleeve 36 is connected to the bearing of the fixed circular plate 39, and the upper end of the aeration pipe 24 is keyed. The first gear 40, the second gear 41 is connected to the shaft of the lower end of the fixed circular plate 39, and the second gear 41 is meshed with the first gear 40, and the movable sleeve 36 is fixedly connected to the ring gear 42, and the ring gear 42 is connected to the second gear. The gear 41 is meshed and connected; the rotation of the aeration tube 24 drives the first gear 40 to rotate, and the second gear 41 drives the gear ring 42 and the movable sleeve 36 to rotate in reverse, and the movable sleeve 36 drives the mounting plate 37 and the movable sleeve 36 while rotating. The second stirring rod 38 stirs from the top of the reaction tank 3 to improve the stirring effect. Because the second stirring rod 38 and the first stirring rod 31 are arranged in a staggered manner, when the second stirring rod 38 and the first stirring rod 31 counter-rotate The flocs inside the reaction tank 3 can be crushed, the reaction between activated sludge and sewage can be enhanced, and the treatment efficiency of sewage can be improved.

The content that is not described in detail in this specification belongs to the prior art known to those skilled in the art. Although the embodiment of the present invention has been shown and described, it can be understood by those of ordinary skill in the art that without departing from this Various changes, modifications, substitutions and variations can be made to these embodiments without compromising the principles and spirit of the invention, the scope of the invention being defined by the appended claims and their equivalents.

Claims (9)

1. The utility model provides a sewage treatment device based on bioengineering principle, includes treatment facility main part (1), reaction tank (3) and sedimentation tank (4), its characterized in that:

a filter tank (2) is arranged in the left end of the treatment equipment main body (1), and a reaction tank (3) is arranged in the middle of the treatment equipment main body (1);

a sedimentation tank (4) is arranged at the right end of the treatment equipment main body (1), a water inlet pipe (5) is connected to the upper end of the filtering tank (2), and a first conduction pipe (6) is arranged in the filtering tank (2);

the upper end of the first conduction pipe (6) is connected with a first water pump (7), the right end of the first water pump (7) is in conduction connection with the reaction tank (3), the bottom end of the reaction tank (3) is connected with a second conduction pipe (8), the upper end of the second conduction pipe (8) is connected with a second water pump (9), and the right end of the second water pump (9) is in conduction connection with the sedimentation tank (4);

the upper end of the right side of the sedimentation tank (4) is connected with a water outlet pipe (10), and the lower end of the right side of the sedimentation tank (4) is connected with a sludge discharge pipe (11);

the air pump (21) is installed at the lower end of the treatment equipment main body (1), the left end of the air pump (21) is connected with a square pipe (22), and the upper end of the square pipe (22) is connected with a check valve (23);

reaction tank (3) inside is run through and is had aeration pipe (24), and aeration pipe (24) lower extreme and reaction tank (3) are connected through sealed bearing, aeration pipe (24) lower extreme and check valve (23) turn-on connection, and aeration hole (25) have been seted up to aeration pipe (24) outside array to aeration pipe (24) and check valve (23) adopt sealed bearing to be connected.

2. The sewage treatment apparatus based on the bioengineering principle according to claim 1, wherein: a filter screen (12) is fixedly installed at the upper end inside the filter tank (2), an annular baffle (13) is connected to the upper end of the filter screen (12), and a trash discharging hole (14) is formed in the rear side of the filter screen (12);

arrange miscellaneous hole (14) lower extreme and be provided with water conservancy diversion square groove (15), and water conservancy diversion square groove (15) upper end and filter screen (12) fixed connection, and water conservancy diversion square groove (15) run through to filtering ponds (2) outside.

3. The sewage treatment device based on the bioengineering principle according to claim 2, wherein: the first conduction pipe (6) is designed to be of a square structure, a first impeller (16) is arranged inside the first conduction pipe (6), the left end of the first conduction pipe (6) is fixedly connected with a fixing plate (17), a worm (18) is connected to the inner bearing of the fixing plate (17), and the right end of the worm (18) penetrates through the first conduction pipe (6) and is fixedly connected with the first impeller (16).

4. The sewage treatment apparatus based on the bioengineering principle according to claim 3, wherein: a first transmission rod (19) is connected to a bearing in the filter screen (12), the lower end of the first transmission rod (19) penetrates into the fixed plate (17), the lower end of the first transmission rod (19) is connected with a worm wheel (20) in a key mode, and the worm wheel (20) is connected with a worm (18) in a meshed mode;

the upper end of the first transmission rod (19) is connected with four scraping plates (43), the four scraping plates (43) are arranged in an array, and the lower ends of the scraping plates (43) are in contact with the upper surface of the filter screen (12).

5. The sewage treatment apparatus based on the bioengineering principle according to claim 1, wherein: a second impeller (26) is arranged inside the square pipe (22), a second transmission rod (27) is connected to the upper end of the square pipe (22) through a sealing bearing, and the lower end of the second transmission rod (27) penetrates through the inside of the square pipe (22) and is fixedly connected with the second impeller (26);

the upper end key of the second transmission rod (27) is connected with a driving gear (28), the lower end of the aeration pipe (24) is connected with a driven gear (29), the driving gear (28) is meshed with the driven gear (29) and the diameter of the driving gear (28) is smaller than that of the driven gear (29).

6. The sewage treatment apparatus based on the bioengineering principle according to claim 1, wherein: the reaction tank (3) is internally provided with a movable plate (30), the movable plate (30) is fixedly connected with the aeration pipe (24), the movable plate (30) and the reaction tank (3) are both in a circular structural design, the upper end of the movable plate (30) is connected with four groups of first stirring rods (31), and the first stirring rods (31) are arranged on the upper end face of the movable plate (30) in an array manner.

7. The sewage treatment device based on the bioengineering principle according to claim 6, wherein: a movable groove (32) is formed in the movable plate (30), a sliding plate (33) is connected in the movable groove (32) in a sliding manner, a spring (34) is arranged in the movable groove (32), and two ends of the spring (34) are respectively fixedly connected with the inner wall of the movable groove (32) and the sliding plate (33);

the outer part of the sliding plate (33) is connected with a scraping strip (35) through a bolt, and the outer end face of the scraping strip (35) is in contact with the inner wall of the reaction tank (3).

8. The sewage treatment apparatus based on the bioengineering principle according to claim 1, wherein: aeration pipe (24) upper end bearing is connected with movable sleeve (36), and movable sleeve (36) outside fixedly connected with mounting panel (37), mounting panel (37) are "ten" font structural design, and mounting panel (37) lower extreme fixedly connected with second puddler (38) to second puddler (38) and first puddler (31) crisscross setting.

9. The sewage treatment apparatus based on the bioengineering principle according to claim 1, wherein: a fixed circular plate (39) is fixedly arranged at the top end of the reaction tank (3), and the upper end of the movable sleeve (36) is in bearing connection with the fixed circular plate (39);

the upper end of the aeration pipe (24) is in key connection with a first gear (40), the lower end of the fixed circular plate (39) is in shaft connection with a second gear (41), and the second gear (41) is in meshed connection with the first gear (40);

a gear ring (42) is fixedly connected inside the movable sleeve (36), and the gear ring (42) is meshed with the second gear (41).

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