CN214781223U

CN214781223U - Energy-concerving and environment-protective type municipal sewage treatment plant

Info

Publication number: CN214781223U
Application number: CN202121266814.1U
Authority: CN
Inventors: 单善; 吴清桂; 单连英; 马静; 王占涛
Original assignee: Xinjiang Production And Construction Corps Construction Engineering Group Environmental Engineering Co ltd
Current assignee: Xinjiang Production And Construction Corps Construction Engineering Group Environmental Engineering Co ltd
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2021-11-19
Anticipated expiration: 2031-06-03

Abstract

The utility model relates to a sewage treatment technical field just discloses an energy-concerving and environment-protective type municipal sewage treatment plant, including first processing pond, the sewage injection pipe that the left side fixedly connected with in first processing pond communicates each other with it, first processing pond lower extreme fixedly connected with supporting leg, the right side in first processing pond is provided with the second and handles the pond, the right side in second processing pond is provided with the third and handles the pond, first processing pond all is provided with sealed lid with the upper end in third processing pond, the inside in first processing pond is provided with precipitation mechanism, the inside in second processing pond is provided with automatic feeding mechanism, the inside in third processing pond is provided with filter mechanism. This energy-concerving and environment-protective type municipal sewage treatment plant, the at utmost purifies and filters sewage, improves the filter effect of sewage for sewage accord with emission standard more when discharging, avoid sewage to cause secondary pollution to external environment simultaneously, consequently improve environmental safety.

Description

Energy-concerving and environment-protective type municipal sewage treatment plant

Technical Field

The utility model relates to a sewage treatment technical field specifically is an energy-concerving and environment-protective type municipal sewage treatment plant.

Background

The patent with the application number of CN202020270145.4 discloses a municipal sewage treatment device, through using sewage treatment bucket among this technical scheme, the water inlet, the delivery port, the bearing, the dwang, the carousel, spacing dish, cylindrical gear I, the slotted hole, structure cooperation such as proportioning device realizes adding the medicament to the ration in the sewage, consequently with harmful substance and impurity in the sewage, but only carried out simple mixing with sewage treatment medicament to sewage among this technical scheme, consequently impurity and grease that contain in the sewage can not obtain fine sediment and filtration, and then sewage treatment's effect does not reach the best, consequently make the treatment effect difference of sewage strong people's intention.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides an energy-concerving and environment-protective type municipal sewage treatment plant possesses and to carry out the filtration of multistep to sewage, consequently improves advantages such as the filter effect of sewage, has solved and has only carried out simple mixing with the sewage treatment medicament to sewage, consequently impurity and grease that contain in the sewage can not obtain fine sediment and filtration, and then the effect of sewage treatment does not reach best, consequently makes the poor problem of satisfying people of treatment effect of sewage.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an energy-concerving and environment-protective type municipal sewage treatment plant, including first processing pond, the sewage injection pipe that the left side fixedly connected with in first processing pond communicates each other with it, first processing pond lower extreme fixedly connected with supporting leg, the right side in first processing pond is provided with the second and handles the pond, the right side in second processing pond is provided with the third and handles the pond, the upper end in first processing pond and third processing pond all is provided with sealed lid, the inside in first processing pond is provided with deposits the mechanism, the inside in second processing pond is provided with automatic feeding mechanism, the inside in third processing pond is provided with filtering mechanism.

Preferably, the first honeycomb duct that the left side fixedly connected with of first processing pond communicates each other with its inside, the one end that first honeycomb duct does not contact with first processing pond communicates each other with the inside of second processing pond, the second honeycomb duct that second processing pond right side fixedly connected with communicates each other with its inside, the left end fixedly connected with water pump of second honeycomb duct, the water inlet of second honeycomb duct communicates each other with the water pump, the delivery port fixedly connected with of water pump communicates each other with it the water-supply pipe, the water-supply pipe is reverse zigzag, the one end that the water-supply pipe does not contact with the water pump communicates each other with the inside of third processing pond, the left side fixedly connected with drain pipe of third processing pond.

Preferably, the sedimentation mechanism comprises a sedimentation tank, the sedimentation tank is fixedly connected to the lower end of the first treatment tank, the sedimentation tank is communicated with the inside of the first treatment tank, a blow-off pipe is fixedly connected to the lower end of the sedimentation tank, and a valve is arranged on the blow-off pipe.

Preferably, the inside bottom surface fixedly connected with two bracing pieces of first processing pond, equal fixedly connected with stopper on two bracing pieces, two stoppers all are located the top of sewage injection pipe, and sliding connection has the oil absorption felt on two bracing pieces.

Preferably, automatic throw material mechanism and include the explosive box, explosive box fixed connection handles the inside upside in pond at the second, the upper end in pond is handled to the second has been seted up and has been thrown the medicine hole, the inside intercommunication each other of medicine hole and explosive box is thrown to the medicine hole, the inside swing joint who throws the medicine hole has the stopper, the medicine hole has been seted up out to the lower surface of explosive box, the lower surface of explosive box is provided with the apron, the fixed orifices has been seted up to the upper surface of apron, the inside fixedly connected with pivot of fixed orifices, the upper end fixed connection of pivot is at the lower surface of explosive box, be provided with torsion spring in the pivot, two torsion arms of torsion spring are fixed connection respectively in the lower surface and the pivot of explosive box, the lower fixed surface of apron is connected with the movable plate.

Preferably, the filtering mechanism comprises a first frame, the first frame is movably clamped in the third treatment tank, a first filter screen is arranged in the first frame, the upper surface of the first frame is fixedly connected with a pull rod, the lower surface of the first frame is fixedly connected with a connecting plate, the connecting plate is in a shape like a Chinese character 'hui', the lower ends of the two connecting plates are fixedly connected with a second frame, a second filter screen is arranged in the second frame, and activated carbon particles are placed on the second filter screen.

(III) advantageous effects

Compared with the prior art, the utility model provides an energy-concerving and environment-protective type municipal sewage treatment plant possesses following beneficial effect:

1. this energy-concerving and environment-protective type municipal sewage treatment plant, the sewage through setting is inside to deposit at first treatment tank, make the great impurity of proportion obtain to deposit and separate with sewage, and adsorb the grease that floats on sewage at the in-process to sewage precipitation, and sewage mixes at second treatment tank and sewage treatment medicament after depositing, make the harmful substance in the sewage obtain the degradation, and then rethread third treatment tank filters it, consequently the at utmost purifies and filters sewage, improve the filter effect of sewage, make sewage accord with emission standard more when discharging, avoid sewage to cause secondary pollution to external environment simultaneously, consequently, the environmental safety is improved.

2. This energy-concerving and environment-protective type municipal sewage treatment plant, through setting up the sealed lid on first treatment tank, when needs are changed to inhaling the oil felt, only need open sealed lid, take off old oil felt, more new can, and then when guaranteeing sewage treatment, the detach effect of grease, and then guarantee the treatment effeciency of sewage, and be located the top of sewage injection pipe through the stopper that sets up, and then avoid inhaling the oil felt to cover the sewage injection pipe, and then guarantee that sewage can carry out normal injection.

3. This energy-concerving and environment-protective type municipal sewage treatment plant, when sewage pours into the inside in first treatment tank, all rises along with the water level absolutely, and then makes the oil absorption felt slide on the bracing piece along with the change of water level, and then makes the oil absorption felt be located the liquid level of water level all the time, and then adsorbs the grease of aquatic, and then accomplishes the processing to the grease that contains in the sewage, consequently makes follow-up step higher faster to sewage treatment's efficiency, improves sewage treatment's quality simultaneously.

4. The energy-saving environment-friendly urban sewage treatment device comprises a movable plate, wherein after sewage is precipitated in a first treatment tank, the sewage flows into a second treatment tank through a first guide pipe, the impact force of the sewage acts on the movable plate, the movable plate is stressed to drive a covering plate to move, and the covering plate does not cover a medicine outlet hole at the moment, so that a sewage treatment agent flows out through the medicine outlet hole, the agent is mixed with the sewage, harmful substances and impurities in the sewage are degraded, the sewage is treated again, and the sewage is ensured to be discharged without causing great pollution to the outside, so that the environmental safety of the sewage treatment device is improved, meanwhile, the range opened by the covering plate is different according to the sewage impact force, so that the quantitative input and the automatic input of the sewage treatment agent are realized, and unnecessary agent waste is reduced, saving sewage treatment cost and improving the automation performance.

5. This energy-concerving and environment-protective type municipal sewage treatment plant, through the torsion spring who sets up, the removal of cover plate makes torsion spring take place to rotate, when sewage is not when coveing the impact, torsion spring resumes, consequently drives the cover plate and covers again out the medicine hole, consequently makes the sewage treatment medicament obtain practicing thrift, and then reduce cost to and can carry out the replenishment of medicament to the inside of explosive box through the hole of offeing medicine that sets up, make more convenient and fast when the medicament supplyes.

6. This energy-concerving and environment-protective type municipal sewage treatment plant through being provided with sealed lid on the third treatment tank, when first filter screen and second filter screen and active carbon granule change and clear up, opens sealed lid, can pull out first filter screen and second filter screen from the inside in third treatment tank through the pull rod, and then changes and clear up it.

Drawings

FIG. 1 is a schematic view of the energy-saving and environment-friendly municipal sewage treatment plant of the present invention;

FIG. 2 is a front view showing the structure of an energy-saving and environment-friendly municipal sewage treatment plant of the present invention;

fig. 3 is an enlarged schematic view of a structure shown in fig. 2 according to the present invention.

In the figure: 1 a first treatment pool, 101 a sedimentation pool, 102 a sewage injection pipe, 103 supporting legs, 104 a sewage discharge pipe, 105 a valve, 106 a sealing cover, 107 a supporting rod, 108 a limiting block, 109 an oil absorption felt, 2 a first guide pipe, 3 a second treatment pool, 301 a medicine feeding hole, 302 a plug, 303 a moving plate, 304 a covering plate, 305 a fixing hole, 306 a rotating shaft, 307 a torsion spring, 308 a medicine storage box, 309 a medicine discharging hole, 4 a second guide pipe, 5 a water pump, 6 a water feeding pipe, 7 a third treatment pool, 701 a first frame, 702 a pull rod, 703 a first filter screen, 704 a connecting plate, 705 activated carbon particles, 706 a second filter screen, 707, a second frame and 8 a water discharging pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a new technical solution: an energy-saving and environment-friendly urban sewage treatment device comprises a first treatment tank 1, wherein the left side of the first treatment tank 1 is fixedly connected with a sewage injection pipe 102 which is communicated with the inside of the first treatment tank 1, the lower end of the first treatment tank 1 is fixedly connected with a supporting leg 103, the right side of the first treatment tank 1 is provided with a second treatment tank 3, the right side of the second treatment tank 3 is provided with a third treatment tank 7, the upper ends of the first treatment tank 1 and the third treatment tank 7 are both provided with a sealing cover 106, the inside of the first treatment tank 1 is provided with a precipitation mechanism, the inside of the second treatment tank 3 is provided with an automatic feeding mechanism, and the inside of the third treatment tank 7 is provided with a filtering mechanism;

the left side of the first treatment pool 1 is fixedly connected with a first guide pipe 2 which is mutually communicated with the inside of the first treatment pool, one end of the first guide pipe 2 which is not contacted with the first treatment pool 1 is mutually communicated with the inside of the second treatment pool 3, the right side of the second treatment pool 3 is fixedly connected with a second guide pipe 4 which is mutually communicated with the inside of the second treatment pool 3, the left end of the second guide pipe 4 is fixedly connected with a water pump 5, the second guide pipe 4 is mutually communicated with a water inlet of the water pump 5, a water outlet of the water pump 5 is fixedly connected with a water feeding pipe 6 which is mutually communicated with the water pump, the water feeding pipe 6 is in a reverse Z shape, one end of the water feeding pipe 6 which is not contacted with the water pump 5 is mutually communicated with the inside of a third treatment pool 7, the left side of the third treatment pool 7 is fixedly connected with a water discharging pipe 8, and the sewage can be treated step by step-by mutual communication among the arranged first treatment pool 1, the second treatment pool 3 and the third treatment pool 7, impurities and harmful substances in the sewage can be thoroughly cleaned and purified, so that the sewage discharge meets the requirements better, secondary pollution to the environment is avoided, and the environmental safety is improved;

the sedimentation mechanism comprises a sedimentation tank 101, the sedimentation tank 101 is fixedly connected to the lower end of the first treatment tank 1, the sedimentation tank 101 is communicated with the interior of the first treatment tank 1, the lower end of the sedimentation tank 101 is fixedly connected with a drain pipe 104, a valve 105 is arranged on the drain pipe 104, through the arranged sedimentation tank 101, when sewage is injected into the interior of the first treatment tank 1 through a sewage injection pipe 102, sludge and impurities with larger weight contained in the sewage are precipitated inside the sedimentation tank 101, so that the first treatment on the sewage is realized, through the arranged valve 105, when the impurities and sludge precipitated inside the sedimentation tank 101 are required to be cleaned, the valve 105 is opened so that the sludge and the impurities flow out from the interior of the sedimentation tank 101 through the drain pipe 104, and then the integral treatment on the sludge and the impurities is completed;

two support rods 107 are fixedly connected to the bottom surface inside the first treatment tank 1, two limit blocks 108 are fixedly connected to the two support rods 107, the two limit blocks 108 are both located above the sewage injection pipe 102, oil absorbent felts 109 are slidably connected to the two support rods 107, the oil absorbent felts 109 are not described herein for the existing result, when sewage is injected into the first treatment tank 1, the sewage rises with the water level, the oil absorbent felts 109 slide on the support rods 107 along with the change of the water level, the oil absorbent felts 109 can be located on the liquid level of the water level all the time, grease in the water is adsorbed, and the treatment of grease contained in the sewage is completed, so that the sewage treatment efficiency in the subsequent steps is higher and faster, the sewage treatment quality is improved, meanwhile, when the oil absorbent felts 109 need to be replaced through the sealing covers 106 arranged on the first treatment tank 1, only the sealing cover 106 needs to be opened, the old oil absorption felt 109 is taken down and replaced with a new one, so that the grease removing effect and the sewage treatment efficiency are ensured when sewage is treated, and the oil absorption felt 109 is prevented from covering the sewage injection pipe 102 by the limit block 108 arranged above the sewage injection pipe 102, so that the sewage can be normally injected;

the automatic feeding mechanism comprises a medicine storage box 308, the medicine storage box 308 is fixedly connected to the upper side inside the second treatment pool 3, a medicine feeding hole 301 is formed in the upper end of the second treatment pool 3, the medicine feeding hole 301 is communicated with the inside of the medicine storage box 308, a plug 302 is movably connected inside the medicine feeding hole 301, a medicine outlet hole 309 is formed in the lower surface of the medicine storage box 308, a covering plate 304 is arranged on the lower surface of the medicine storage box 308, a fixed hole 305 is formed in the upper surface of the covering plate 304, a rotating shaft 306 is fixedly connected inside the fixed hole 305, the upper end of the rotating shaft 306 is fixedly connected to the lower surface of the medicine storage box 308, a torsion spring 307 is arranged on the rotating shaft 306, two torsion arms of the torsion spring 307 are fixedly connected to the lower surface of the medicine storage box 308 and the rotating shaft 306 respectively, a movable plate 303 is fixedly connected to the lower surface of the covering plate 304, and after sewage is precipitated inside the first treatment pool 1 through the arranged movable plate 303, flows into the second treatment tank 3 through the first flow guide pipe 2, the impact force of the sewage acts on the movable plate 303, the movable plate 303 is stressed to drive the covering plate 304 to move, the covering plate 304 does not cover the medicine outlet 309 at the moment, so that the sewage treatment agent flows out through the medicine outlet 309 and is mixed with the sewage, harmful substances and impurities in the sewage are degraded, the sewage is treated again, the sewage is prevented from causing large pollution to the outside when being discharged, the environmental safety is improved, the opening range of the covering plate 304 is different according to the sewage impact force, the quantitative input and the automatic input of the sewage treatment agent are realized, unnecessary agent waste is reduced, the sewage treatment cost is saved, the automation performance is improved, and the torsion spring 307 is arranged, the movement of the cover plate 304 enables the torsion spring 307 to rotate, when sewage does not impact the cover plate 304, the torsion spring 307 recovers, so that the cover plate 304 is driven to cover the medicine outlet hole 309 again, sewage treatment medicines are saved, the cost is reduced, and the medicines can be supplemented into the medicine storage box 308 through the arranged medicine feeding hole 301, so that the medicines are more convenient and faster to supplement;

the filtering mechanism comprises a first frame 701, the first frame 701 is movably clamped inside the third treatment tank 7, a first filter screen 703 is arranged inside the first frame 701, a pull rod 702 is fixedly connected to the upper surface of the first frame 701, connecting plates 704 are fixedly connected to the lower surface of the first frame 701, the connecting plates 704 are in a shape like a Chinese character 'hui', the lower ends of the two connecting plates 704 are fixedly connected with a second frame 707, a second filter screen 706 is arranged inside the second frame 707, activated carbon particles 705 are placed on the second filter screen 706, when the sewage is mixed with the medicament in the second treatment tank 3, the water pump 5 is started, the water pump 5 pumps the sewage into the third treatment tank 7 through a second guide pipe 4 and injects the sewage into the third treatment tank 7 through a water supply pipe 6, the sewage flows out from the upper part inside the third treatment tank 7 at the moment, the sewage is contacted with the first filter screen 703, the sewage contacts with the activated carbon particles 705 after passing through the first filter screen 703, the activated carbon particles 705 adsorb and filter impurities and harmful substances contained in the sewage again, the sewage contacts with the second filter screen 706 after passing through the activated carbon particles 705, and then the second filter screen 706 filters the sewage finally, at the moment, the sewage flows into the bottom of the third treatment tank 7 and is discharged through the drain pipe 8, and then the whole step of sewage treatment is completed, through being provided with the sealing cover 106 on the third treatment tank 7, when the first filter screen 703 and the second filter screen 706 and the activated carbon particles 705 are replaced and cleaned, the sealing cover 106 is opened, the first filter screen 703 and the second filter screen 706 can be pulled out from the inside of the third treatment tank 7 through the pull rod 702, and then the first filter screen 703 and the second filter screen 706 are replaced and cleaned.

The working principle is as follows: through the arranged sedimentation tank 101, when sewage is injected into the first treatment tank 1 through the sewage injection pipe 102, sludge and impurities with large weight contained in the sewage are precipitated inside the sedimentation tank 101, so that the sewage is treated for the first time, and through the arranged valve 105, when the impurities and sludge precipitated inside the sedimentation tank 101 need to be cleaned, the valve 105 is opened so that the sludge and the impurities flow out from the inside of the sedimentation tank 101 through the sewage discharge pipe 104, so that the integral treatment of the sludge and the impurities is completed;

through the arranged movable plate 303, after sewage is precipitated in the first treatment tank 1, the sewage flows into the second treatment tank 3 through the first flow guide pipe 2, the impact force of the sewage acts on the movable plate 303 at the moment, the movable plate 303 is stressed to drive the covering plate 304 to move, the covering plate 304 does not cover the medicine outlet 309 at the moment, so that a sewage treatment agent flows out through the medicine outlet 309, the agent is mixed with the sewage, harmful substances and impurities contained in the sewage are degraded, the sewage is treated again, and when the sewage is ensured to be discharged, the environment safety is improved without causing large pollution to the outside, meanwhile, according to the difference of the sewage impact force, the range opened by the covering plate 304 is different, so that the quantitative input and the automatic input of the sewage treatment agent are realized, and unnecessary waste of the agent is reduced, the sewage treatment cost is saved, the automation performance of the sewage treatment device is improved, the torsion spring 307 is rotated by the movement of the covering plate 304 through the arranged torsion spring 307, when sewage does not impact the covering plate 304, the torsion spring 307 is restored, so that the covering plate 304 is driven to cover the medicine outlet 309 again, sewage treatment medicines are saved, the cost is reduced, and the medicines can be supplemented into the medicine storage box 308 through the arranged medicine feeding hole 301, so that the medicines are more convenient and faster to supplement;

after the sewage is mixed with the medicament in the second treatment tank 3, the water pump 5 is started, the water pump 5 pumps the sewage into the third treatment tank 7 through the second guide pipe 4 and injects the sewage into the third treatment tank 7 through the water feeding pipe 6, at the moment, the sewage flows out from the upper part inside the third treatment tank 7 and contacts with the first filter screen 703, the first filter screen 703 filters the sewage for the first time, the sewage contacts with the activated carbon particles 705 after passing through the first filter screen 703, the activated carbon particles 705 absorb and filter impurities and harmful substances in the sewage again, the sewage contacts with the second filter screen 706 after passing through the activated carbon particles 705, the second filter screen 706 finally filters the sewage, at the moment, the sewage flows into the bottom of the third treatment tank 7 and is discharged through the water discharging pipe 8, and the whole step of sewage treatment is completed.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an energy-concerving and environment-protective type municipal sewage treatment plant, includes first treatment tank (1), its characterized in that: the sewage treatment device is characterized in that a sewage injection pipe (102) is fixedly connected to the left side of the first treatment tank (1) and communicated with the inside of the first treatment tank (1), supporting legs (103) are fixedly connected to the lower end of the first treatment tank (1), a second treatment tank (3) is arranged on the right side of the first treatment tank (1), a third treatment tank (7) is arranged on the right side of the second treatment tank (3), sealing covers (106) are arranged at the upper ends of the first treatment tank (1) and the third treatment tank (7), a precipitation mechanism is arranged inside the first treatment tank (1), an automatic feeding mechanism is arranged inside the second treatment tank (3), and a filtering mechanism is arranged inside the third treatment tank (7).

2. The energy-saving environment-friendly municipal sewage treatment plant according to claim 1, characterized in that: the utility model discloses a sewage treatment device, including first pond (1), first honeycomb duct (2) that the left side fixedly connected with of first pond (1) communicates each other with its inside, first honeycomb duct (2) do not communicate each other with the inside of first pond (1) contact's one end and second pond (3) of handling, second pond (3) right side fixedly connected with communicates each other with its inside second honeycomb duct (4) that communicates each other, the left end fixedly connected with water pump (5) of second honeycomb duct (4), water inlet intercommunication each other of second honeycomb duct (4) and water pump (5), the delivery port fixedly connected with of water pump (5) is last water pipe (6) that communicates each other with it, last water pipe (6) are reverse zigzag, the one end that last water pipe (6) do not contact with water pump (5) communicates each other with the inside of third pond (7), the left side fixedly connected with drain pipe (8) of third pond (7).

3. The energy-saving environment-friendly municipal sewage treatment plant according to claim 1, characterized in that: the sedimentation mechanism comprises a sedimentation tank (101), the sedimentation tank (101) is fixedly connected to the lower end of the first treatment tank (1), the sedimentation tank (101) is communicated with the inside of the first treatment tank (1), a drainage pipe (104) is fixedly connected to the lower end of the sedimentation tank (101), and a valve (105) is arranged on the drainage pipe (104).

4. The energy-saving environment-friendly municipal sewage treatment plant according to claim 1, characterized in that: the inside bottom surface fixedly connected with two bracing pieces (107) of first processing pond (1), equal fixedly connected with stopper (108) on two bracing pieces (107), two stoppers (108) all are located the top of sewage injection pipe (102), and sliding connection has oil absorption felt (109) on two bracing pieces (107).

5. The energy-saving environment-friendly municipal sewage treatment plant according to claim 1, characterized in that: the automatic feeding mechanism comprises a medicine storage box (308), the medicine storage box (308) is fixedly connected to the upper side of the interior of the second treatment pool (3), a medicine feeding hole (301) is formed in the upper end of the second treatment pool (3), the medicine feeding hole (301) is communicated with the interior of the medicine storage box (308), a plug (302) is movably connected to the interior of the medicine feeding hole (301), a medicine outlet hole (309) is formed in the lower surface of the medicine storage box (308), a covering plate (304) is arranged on the lower surface of the medicine storage box (308), a fixed hole (305) is formed in the upper surface of the covering plate (304), a rotating shaft (306) is fixedly connected to the interior of the fixed hole (305), the upper end of the rotating shaft (306) is fixedly connected to the lower surface of the medicine storage box (308), a torsion spring (307) is arranged on the rotating shaft (306), and two torsion arms of the torsion spring (307) are fixedly connected to the lower surface of the medicine storage box (308) and the rotating shaft (306) respectively, the lower surface of the cover plate (304) is fixedly connected with a moving plate (303).

6. The energy-saving environment-friendly municipal sewage treatment plant according to claim 1, characterized in that: the filter mechanism comprises a first frame (701), the first frame (701) is movably clamped in the third treatment tank (7), a first filter screen (703) is arranged in the first frame (701), a pull rod (702) is fixedly connected to the upper surface of the first frame (701), a connecting plate (704) is fixedly connected to the lower surface of the first frame (701), the connecting plate (704) is in a shape like a Chinese character 'hui', a second frame (707) is fixedly connected to the lower ends of the two connecting plates (704), a second filter screen (706) is arranged in the second frame (707), and activated carbon particles (705) are placed on the second filter screen (706).