CN112340894A

CN112340894A - Sewage treatment device with heavy metal recovery treatment device and treatment method thereof

Info

Publication number: CN112340894A
Application number: CN202110015631.0A
Authority: CN
Inventors: 李宇; 杨骏
Original assignee: Beijing Dunyi Technology Co ltd
Current assignee: Foshan Tianmei Environmental Protection Engineering Co.,Ltd.
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2021-02-09
Anticipated expiration: 2041-01-07
Also published as: CN112340894B

Abstract

The invention discloses a sewage treatment device with a heavy metal recovery treatment device and a treatment method thereof, belonging to the technical field of heavy metal sewage treatment, the sewage treatment device with the heavy metal recovery treatment device comprises a sedimentation tank, wherein a water inlet pipe is arranged at the upper side of the sedimentation tank, a drainage tank is fixedly connected on the outer wall of the sedimentation tank, a drain pipe is fixedly connected at the bottom end of the sedimentation tank, a drain pipe is fixedly connected on the side wall of the drainage tank, an upright post is fixedly connected on the inner wall of the bottom end of the sedimentation tank and is positioned at the center of the sedimentation tank, a mounting rod is rotatably connected at the top end of the upright post and is in an L shape, a motor box and two symmetrically arranged support plates are fixedly connected at the bottom of one end of the mounting rod, when the heavy metal sewage is subjected to sedimentation treatment, the treated water can be drawn out of the sedimentation tank, flocculent precipitate is left in the sedimentation, compared with the prior art, the treatment time is greatly saved, and the treatment efficiency of the heavy metal sewage is improved.

Description

Sewage treatment device with heavy metal recovery treatment device and treatment method thereof

Technical Field

The invention relates to the technical field of heavy metal sewage treatment, in particular to a sewage treatment device with a heavy metal recovery treatment device and a treatment method thereof.

Background

Heavy metals refer to metals with a density of more than 4.5 g per cubic centimeter, including gold, silver, copper, iron, mercury, lead, cadmium and the like, which are accumulated in a human body to a certain extent to cause chronic poisoning, and in the aspect of environmental pollution, the heavy metals mainly refer to heavy elements with significant biological toxicity, such as mercury, cadmium, lead, chromium, metalloid arsenic and the like, which are very difficult to biodegrade, but can be enriched by hundreds of times under the biological amplification effect of a food chain, and finally enter the human body. Heavy metals can interact strongly with proteins and enzymes in the human body, so that the heavy metals lose activity and can also accumulate in certain organs of the human body to cause chronic poisoning.

Heavy metal wastewater treatment refers to a process of purifying heavy metals contained in sewage in order to meet the water quality requirements of a certain water body to be drained or reused. Methods for treating heavy metal wastewater can be roughly divided into three main categories: (1) a chemical method; (2) a physical treatment method; (3) a biological treatment method.

The heavy metal wastewater treatment refers to a process of removing and recycling or innocent treatment of heavy metals in heavy metal wastewater. Heavy metal wastewater is produced in many production processes in industries such as mining and metallurgy, mechanical manufacturing, chemical industry, electronics, instruments and the like. For example, in the metal surface processing, particularly in the electroplating process, a rinsing waste water and a plating bath waste liquid containing heavy metals such as chromium, cadmium, copper, zinc, nickel and the like and cyanides are discharged, and in the production process using mercury, such as a chlor-alkali manufacturing industry using a mercury cathode electrolysis method, an ethylene production process using mercury chloride or mercury sulfate as a catalyst, an electronic and instrument industry using mercury as a raw material, and the like.

The specific methods of heavy metal treatment can be divided into two main categories: firstly, heavy metal in a dissolved state in the wastewater is converted into insoluble heavy metal compounds or elements, and the insoluble heavy metal compounds or elements are removed from the wastewater through precipitation and floating, and a neutralization precipitation method, a sulfide precipitation method, a floating separation method, an ion flotation method, an electrolytic precipitation or electrolytic floating method, a diaphragm electrolysis method and the like can be applied; and the heavy metals in the wastewater are concentrated and separated under the condition of not changing the chemical form of the heavy metals, and a reverse osmosis method, an electrodialysis method, an evaporation method, an ion exchange method and the like can be applied. The first category of processes, in particular the neutralization precipitation process, the sulfide precipitation process and the electrolytic precipitation process, are most widely used.

In the precipitation method, the sewage containing heavy metals is usually put into a precipitation tank, then a heavy metal treatment agent is put into the water to react with the heavy metals in the sewage and precipitate, the heavy metals in the sewage are floccules after the heavy metals and the heavy metal treatment agent completely react, at the moment, the sewage is subjected to standing precipitation, and the floccules are discharged after the floccules are precipitated, so that the main treatment is completed. However, the floccules are long in waiting time during the sedimentation process, and usually take 12 to 24 hours to completely sediment and then carry out the subsequent treatment, which wastes a lot of time.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a sewage treatment device with a heavy metal recovery treatment device and a treatment method thereof, which can realize that when heavy metal sewage is subjected to precipitation treatment, treated water can be pumped out of a precipitation tank, flocculent precipitate is remained in the precipitation tank and is discharged, compared with the prior art, the treatment time is greatly saved, and the treatment efficiency of the heavy metal sewage is improved.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A sewage treatment device with a heavy metal recovery treatment device comprises a sedimentation tank, wherein a water inlet pipe is arranged on the upper side of the sedimentation tank, a drainage tank is fixedly connected onto the outer wall of the sedimentation tank, a blow-off pipe is fixedly connected onto the bottom end of the sedimentation tank, a drainage pipe is fixedly connected onto the side wall of the drainage tank, a stand column is fixedly connected onto the inner wall of the bottom end of the sedimentation tank and is positioned at the center of the sedimentation tank, an installation rod is rotatably connected onto the top end of the stand column and is L-shaped, a motor box and two symmetrically arranged support plates are fixedly connected onto the bottom of one end of the installation rod, the support plates are positioned on one side of the motor box, a motor is fixedly connected into the motor box, the output end of the motor penetrates through the motor box and extends to the outer side of the motor box, and the output end of the motor penetrates through, the top end of the sedimentation tank is provided with a circular track, a rotating shaft is rotatably connected between the two support plates, one end of the rotating shaft penetrates through the support plates and extends to the outer sides of the support plates, rollers are fixedly connected to the outer wall of the rotating shaft, the rollers are positioned on the inner side of the track and are rotatably connected with the track, a speed reducer is fixedly connected between the rotating shaft and the output end of the motor, a filter pipe is fixedly connected to the bottom end of the installation rod, the filter pipe is positioned on the inner side of the motor box, a plurality of through holes are formed between the inner surface and the outer surface of the filter pipe, a filter screen is fixedly connected to the inner wall of the filter pipe, a water pumping pipe is arranged on the inner side of the filter pipe, the top end of the water pumping pipe penetrates through the installation rod and is fixedly connected with the water outlet pipe, a water pump is fixedly connected, the input end of the water pump is fixedly connected with the water pumping pipe, and the outer side of the filter pipe is provided with an anti-blocking device.

Furthermore, anti-clogging device includes fixed plate, first gear belt, carousel, bearing, second gear belt, connecting plate, brush, connecting rod.

Furthermore, the fixed plate is positioned outside the filter pipe, a connecting rod is fixedly connected between the fixed plate and the bottom end of the sedimentation tank, two first gear belts which are symmetrically arranged are fixedly connected on the inner side wall of the fixed plate, two rotating discs which are matched with the first gear belts are arranged on the outer wall of the filter pipe, a bearing is fixedly connected between the rotating discs and the filter pipe, a second gear belt is fixedly connected on the outer wall of the bearing, the second gear belt is hinged with the first gear belts, a connecting plate is fixedly connected between the two rotating discs, a brush is fixedly connected on the side wall of the connecting plate, the brush is attached to the outer wall of the filter pipe, and through the arrangement of the anti-blocking device, when the filter pipe rotates to the position of the fixed plate, the second gear belt is hinged with the first gear belts, namely, the rotating discs are driven to rotate around the filter pipe, the brush brushes around the outer wall of the filter pipe when the filter pipe rotates, so that the situation that the through hole in the filter pipe is blocked by floccules in the sedimentation tank is avoided, if no anti-blocking device is arranged, water can flow into the inside of the filter pipe, and the floccules in the water are easily gathered on the outer surface of the filter pipe to cause blockage when the floccules are too much.

Further, the fixed plate is same centre of a circle with the sedimentation tank, the fixed plate is circular-arc, because the filter tube just can start anti-clogging device when rotating to the fixed plate, if make the fixed plate set up to the closed circle, then the brush can be centers on the filter tube and clear up the surface of filter tube all the time, can reduce the life of brush, and can increase the construction cost of fixed plate, and the filter tube can not take place the jam again when rotating the filtration all the time, and the fixed plate sets up to circular-arc messenger's filter tube and can contact the fixed plate when rotating the round and scrub the surface of filter tube, the life of brush has both been increased and the construction cost of fixed plate has been reduced, and can not influence the brush and scrub of filter tube.

Further, it is a plurality of the through-hole all is located between the upper and lower both ends of filter screen and brush, through the setting to through-hole, filter screen, brush, makes the water that enters from in the through-hole can enter into the filter tube through the filtration of filter screen, makes the brush can scrub all through-holes.

Further, fixedly connected with separates the water tank on the outer wall of stand, the upside that separates the water tank is higher than the sedimentation tank, through the setting that separates the water tank, can avoid the water in the sedimentation tank to enter into the junction of stand and installation pole, has improved the life of stand and installation pole tie point.

Further, the top fixedly connected with wireless module of installation pole, wireless module is connected with water pump and motor electricity, can play remote control's effect to water pump and motor through wireless module's setting, more makes things convenient for actual use, because connection control between wireless module and water pump and the motor is more mature technique among the prior art, does not do specific description here.

A treatment method of a sewage treatment device with a heavy metal recovery treatment device comprises the following steps:

s1, discharging the heavy metal wastewater to be treated into a sedimentation tank through a water inlet pipe, and adding a heavy metal treating agent;

s2, starting a motor to enable the mounting rod to rotate, and stirring the heavy metal precipitator in the sedimentation tank through the filter pipe until the heavy metal sewage and the heavy metal precipitator completely react to form floccules.

S3, the water in the sedimentation tank can enter the filter pipe through the filtration of the filter screen, and the heavy metal reactant, namely the floccule, is isolated outside the filter pipe.

And S4, starting a water pump to pump the water treated in the filter pipe into a drainage tank and discharging the water through a drainage pipe.

S5, discharging the water through a sewage discharge pipe when only floccule is left after the water in the drain pipe is pumped out.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) this scheme is through setting up when carrying out the sedimentation treatment to heavy metal sewage, can take out the water after handling from the sedimentation tank, the flocculent precipitate stays to the sedimentation tank in discharge, compares with the conventional art and has saved the processing time greatly, has improved the treatment effeciency of heavy metal sewage.

(2) The fixing plate is positioned at the outer side of the filter pipe, a connecting rod is fixedly connected between the fixing plate and the bottom end of the sedimentation tank, two first gear belts which are symmetrically arranged are fixedly connected on the inner side wall of the fixing plate, two rotating discs which are matched with the first gear belts are arranged on the outer wall of the filter pipe, a bearing is fixedly connected between the rotating discs and the filter pipe, a second gear belt is fixedly connected on the outer wall of the bearing and is hinged with the first gear belts, a connecting plate is fixedly connected between the two rotating discs, a brush is fixedly connected on the side wall of the connecting plate and is attached to the outer wall of the filter pipe, through the arrangement of the anti-blocking device, when the filter pipe rotates to the position of the fixing plate, the second gear belt is hinged with the first gear belt, the rotating discs are driven to rotate around the filter pipe, and the brush brushes brush cleans around the outer wall of, the through hole on the filter pipe is avoided being blocked by the floccule in the sedimentation tank, if the anti-blocking device is not arranged, because water can flow to the inside of the filter pipe, the floccule in the water is easy to gather on the outer surface of the filter pipe to cause blocking when the floccule is too much.

(3) The fixed plate is same centre of a circle with the sedimentation tank, the fixed plate is circular-arcly, because the filter tube just can start anti-clogging device when rotating to the fixed plate, if make the fixed plate set up to the closed circle, then the filter tube is cleared up around always to the surface of filter tube to the brush, can reduce the life of brush, and can increase the construction cost of fixed plate, and the filter tube can not take place the jam again when rotating the filtration, and the fixed plate sets up to circular-arcly makes the filter tube can contact the fixed plate when rotating the round and scrub the surface of filter tube, the life of brush has both been increased and the construction cost of fixed plate has been reduced, and can not influence the brush and scrub of filter tube.

(4) A plurality of through-holes all are located between the upper and lower both ends of filter screen and brush, through the setting to through-hole, filter screen, brush, make the water of following the interior entering of through-hole can enter into the filter tube through the filtration of filter screen, make the brush can scrub all through-holes.

(5) Fixedly connected with separates the water tank on the outer wall of stand, separates the upside of water tank and is higher than the sedimentation tank, through the setting that separates the water tank, can avoid the water in the sedimentation tank to enter into the junction of stand and installation pole, has improved the life of stand and installation pole tie point.

(6) The top fixedly connected with wireless module of installation pole, wireless module and water pump and motor electricity are connected, can play remote control's effect to water pump and motor through wireless module's setting, more make things convenient for actual use, because connection control between wireless module and water pump and the motor is more ripe technique among the prior art, do not do specific description here.

Drawings

FIG. 1 is a schematic front sectional view of the present invention;

FIG. 2 is an enlarged schematic view of FIG. 1 at A according to the present invention;

FIG. 3 is a schematic view of the anti-clogging device of the present invention in a front view in cross section;

FIG. 4 is an enlarged view of the structure of FIG. 3 at B according to the present invention;

FIG. 5 is a schematic top sectional view of the anti-clog apparatus of the present invention;

fig. 6 is an enlarged view of the structure of fig. 5 at C according to the present invention.

The reference numbers in the figures illustrate:

1. a sedimentation tank; 2. a drainage basin; 3. a blow-off pipe; 4. a drain pipe; 5. a water inlet pipe; 6. a column; 7. mounting a rod; 8. a filter tube; 9. a through hole; 10. filtering with a screen; 11. a water pumping pipe; 12. a water pump; 13. a water outlet pipe; 14. a motor case; 15. a motor; 16. a track; 17. a support plate; 18. a rotating shaft; 19. a roller; 20. a speed reducer; 21. a fixing plate; 22. a first gear belt; 23. a turntable; 24. a bearing; 25. a second gear belt; 26. a connecting plate; 27. a brush; 28. a wireless module; 29. a water separating tank; 30. a connecting rod.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-4, a sewage treatment device with a heavy metal recovery processing device comprises a sedimentation tank 1, a water inlet pipe 5 is arranged on the upper side of the sedimentation tank 1, a water drainage tank 2 is fixedly connected on the outer wall of the sedimentation tank 1, a blow-off pipe 3 is fixedly connected at the bottom end of the sedimentation tank 1, a water drainage pipe 4 is fixedly connected on the side wall of the water drainage tank 2, a vertical column 6 is fixedly connected on the inner wall of the bottom end of the sedimentation tank 1, the vertical column 6 is positioned at the center of the sedimentation tank 1, a mounting rod 7 is rotatably connected at the top end of the vertical column 6, the mounting rod 7 is in an L shape, a water separation tank 29 is fixedly connected on the outer wall of the vertical column 6, the upper side of the water separation tank 29 is higher than the sedimentation tank 1, the water in the sedimentation tank 1 can be prevented from entering the joint of the vertical column 6 and the mounting rod 7 by the arrangement of the water separation tank 29, the service life of the connecting point of, the support plate 17 is positioned at one side of the motor box 14, the motor 15 is fixedly connected inside the motor box 14, the output end of the motor 15 penetrates through the motor box 14 and extends to the outer side of the motor box 14, the output end of the motor 15 penetrates through the motor box 14 and is rotatably connected with the motor box, the top end of the sedimentation tank 1 is provided with a circular ring-shaped track 16, a rotating shaft 18 is rotatably connected between the two support plates 17, one end of the rotating shaft 18 penetrates through the support plates 17 and extends to the outer side of the support plates 17, the outer wall of the rotating shaft 18 is fixedly connected with a roller 19, the roller 19 is positioned at the inner side of the track 16 and is rotatably connected with the track 16, a speed reducer 20 is fixedly connected between the rotating shaft 18 and the output end of the motor 15, the bottom end of the mounting rod 7 is fixedly connected with a filter pipe 8, the filter pipe 8 is positioned at the inner side of, the inside of filter pipe 8 is provided with drinking-water pipe 11, the top of drinking-water pipe 11 runs through installation pole 7 and fixed connection with it, the top fixedly connected with water pump 12 of installation pole 7, the output fixedly connected with outlet pipe 13 of water pump 12, the one end of outlet pipe 13 extends to the inboard of drainage pond 2, the input and the drinking-water pipe 11 fixed connection of water pump 12, the top fixedly connected with wireless module 28 of installation pole 7, wireless module 28 is connected with water pump 12 and motor 15 electricity, can play remote control's effect to water pump 12 and motor 15 through the setting of wireless module 28, more make things convenient for actual use, because the connection control between wireless module 28 and water pump 12 and motor 15 is more mature technology among the prior art, do not do the specific description here, the outside of filter pipe 8 is provided with anti-clogging device.

Referring to fig. 1 and 3-6, the anti-clogging device includes a fixing plate 21, a first gear belt 22, a rotating disc 23, a bearing 24, a second gear belt 25, a connecting plate 26, a brush 27, and a connecting rod 30, the fixing plate 21 is located outside the filtering pipe 8, the connecting rod 30 is fixedly connected between the fixing plate 21 and the bottom end of the sedimentation tank 1, two first gear belts 22 symmetrically arranged are fixedly connected on the inner side wall of the fixing plate 21, two rotating discs 23 matched with the first gear belts 22 are arranged on the outer wall of the filtering pipe 8, the bearing 24 is fixedly connected between the rotating discs 23 and the filtering pipe 8, the second gear belt 25 is fixedly connected on the outer wall of the bearing 24, the second gear belt 25 is hinged with the first gear belts 22, the connecting plate 26 is fixedly connected between the two rotating discs 23, the brush 27 is fixedly connected on the side wall of the connecting plate 26, the brush 27 is attached to the outer wall, the through holes 9 are all positioned between the upper end and the lower end of the filter screen 10 and the brush 27, through the arrangement of the through holes 9, the filter screen 10 and the brush 27, water entering from the through holes 9 can enter the filter pipe 8 through the filtration of the filter screen 10, the brush 27 can scrub all the through holes 9, through the arrangement of the anti-blocking device, when the filter pipe 8 rotates to the position of the fixing plate 21, the second gear belt 25 is hinged with the first gear belt 22 at the moment, namely the rotating disc 23 is driven to rotate around the filter pipe 8, the brush 27 scrubs around the outer wall of the filter pipe 8 when the filter pipe 8 rotates, the through holes 9 on the filter pipe 8 are prevented from being blocked by floccules in the sedimentation tank 1, if the anti-blocking device is not arranged, because water can flow into the inside of the filter pipe 8, when the floccules in the water are too much, the floccules are easily gathered on the outer surface of the filter pipe 8 to cause blockage, the fixing plate 21 and the, fixed plate 21 is circular-arc, because filter tube 8 just can start anti-clogging device when rotating to fixed plate 21, if make fixed plate 21 set up to the closed circle, then brush 27 can be always around filter tube 8 and clear up the surface of filter tube 8, can reduce brush 27's life, and can increase fixed plate 21's construction cost, and filter tube 8 can not take place the jam again always when rotating the filtration, and fixed plate 21 sets up to circular-arc messenger filter tube 8 can contact fixed plate 21 when rotating the round and scrub the surface of filter tube 8, the life of brush 27 has both been increased and fixed plate 21's construction cost has been reduced, and can not influence brush 27 to filter tube 8's scrubbing.

s1, discharging the heavy metal wastewater to be treated into a sedimentation tank 1 through a water inlet pipe 5, and adding a heavy metal treatment agent;

s2, starting the motor 15 to rotate the installation rod 7, and stirring the heavy metal precipitator in the sedimentation tank 1 through the filter pipe 8 until the heavy metal sewage and the heavy metal precipitator are completely reacted to form floccules.

S3, the water in the sedimentation tank 1 can enter the filter pipe 8 through the filtration of the filter screen 10, and the heavy metal reactant, namely floccule, is isolated outside the filter pipe 8.

And S4, starting the water pump 12 to pump the water treated in the filter pipe 8 into the drainage pool 2 and discharging the water through the drainage pipe 4.

S5, when only floccule is left after the water in the drain pipe 4 is pumped out, the floccule is discharged through the drain pipe 3.

The above are merely preferred embodiments of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims

1. The utility model provides a sewage treatment plant with heavy metal recovery processing device, includes sedimentation tank (1), the upside of sedimentation tank (1) is provided with inlet tube (5), its characterized in that: the water-saving sewage treatment device is characterized in that a drainage pool (2) is fixedly connected to the outer wall of the sedimentation pool (1), a blow-off pipe (3) is fixedly connected to the bottom end of the sedimentation pool (1), a drainage pipe (4) is fixedly connected to the side wall of the drainage pool (2), a stand column (6) is fixedly connected to the inner wall of the bottom end of the sedimentation pool (1), the stand column (6) is located at the center of the sedimentation pool (1), an installation rod (7) is rotatably connected to the top end of the stand column (6), the installation rod (7) is L-shaped, a motor box (14) and two symmetrically arranged support plates (17) are fixedly connected to the bottom of one end of the installation rod (7), the support plates (17) are located on one side of the motor box (14), a motor (15) is fixedly connected to the inside of the motor box (14), and the output end of the motor (15) penetrates through the motor box (, the output end of the motor (15) penetrates through the motor box (14) and is rotationally connected with the motor box, the top end of the sedimentation tank (1) is provided with a circular ring-shaped rail (16), two supporting plates (17) are rotationally connected with a rotating shaft (18), one end of the rotating shaft (18) penetrates through the supporting plates (17) and extends to the outer sides of the supporting plates (17), the outer wall of the rotating shaft (18) is fixedly connected with rollers (19), the rollers (19) are positioned on the inner sides of the rails (16) and are rotationally connected with the rails, a speed reducer (20) is fixedly connected between the rotating shaft (18) and the output end of the motor (15), the bottom end of the mounting rod (7) is fixedly connected with a filter pipe (8), the filter pipe (8) is positioned on the inner sides of the motor box (14), a plurality of through holes (9) are formed between the inner and outer sides of the filter pipe (8), and a filter screen (10) is, the inboard of filter tube (8) is provided with drinking-water pipe (11), the top of drinking-water pipe (11) runs through installation pole (7) and fixed connection with it, the top fixedly connected with water pump (12) of installation pole (7), the output fixedly connected with outlet pipe (13) of water pump (12), the one end of outlet pipe (13) extends to the inboard of drainage basin (2), the input and the drinking-water pipe (11) fixed connection of water pump (12), the outside of filter tube (8) is provided with anti-clogging device.

2. The sewage treatment device with the heavy metal recovery treatment device according to claim 1, wherein: the anti-blocking device comprises a fixing plate (21), a first gear belt (22), a rotary table (23), a bearing (24), a second gear belt (25), a connecting plate (26), a brush (27) and a connecting rod (30).

3. The sewage treatment device with the heavy metal recovery treatment device according to claim 2, wherein: the fixing plate (21) is positioned at the outer side of the filter pipe (8), a connecting rod (30) is fixedly connected between the fixing plate (21) and the bottom end of the sedimentation tank (1), two first gear belts (22) which are symmetrically arranged are fixedly connected on the inner side wall of the fixed plate (21), two turntables (23) matched with the first gear belt (22) are arranged on the outer wall of the filter pipe (8), a bearing (24) is fixedly connected between the turntable (23) and the filter pipe (8), a second gear belt (25) is fixedly connected on the outer wall of the bearing (24), the second gear belt (25) is hinged with the first gear belt (22), a connecting plate (26) is fixedly connected between the two rotating discs (23), the side wall of the connecting plate (26) is fixedly connected with a hairbrush (27), and the hairbrush (27) is attached to the outer wall of the filter pipe (8).

4. The sewage treatment device with the heavy metal recovery treatment device according to claim 3, wherein: the fixing plate (21) and the sedimentation tank (1) are in the same circle center, and the fixing plate (21) is arc-shaped.

5. The sewage treatment device with the heavy metal recovery treatment device according to claim 3, wherein: the through holes (9) are positioned between the upper end and the lower end of the filter screen (10) and the brush (27).

6. The sewage treatment device with the heavy metal recovery treatment device according to claim 1, wherein: the outer wall of the upright post (6) is fixedly connected with a water separating tank (29), and the upper side of the water separating tank (29) is higher than the sedimentation tank (1).

7. The sewage treatment device with the heavy metal recovery treatment device according to claim 1, wherein: the top end fixedly connected with wireless module (28) of installation pole (7), wireless module (28) are connected with water pump (12) and motor (15) electricity.

8. The method according to any one of claims 1 to 7, wherein: the method comprises the following steps:

s1, discharging the heavy metal wastewater to be treated into a sedimentation tank (1) through a water inlet pipe (5), and adding a heavy metal treating agent;

s2, starting a motor (15) to enable an installation rod (7) to rotate, and stirring the heavy metal precipitator in the sedimentation tank (1) through a filter pipe (8) until the heavy metal sewage and the heavy metal precipitator completely react to form floccules;

s3, filtering the water in the sedimentation tank (1) through a filter screen (10) to enter a filter pipe (8), and isolating a heavy metal reactant, namely floccule, outside the filter pipe (8);

s4, starting a water pump (12) to pump the water treated in the filter pipe (8) into the drainage pool (2) and discharging the water through a drainage pipe (4);

s5, when only floccule is left after the water in the drain pipe (4) is pumped out, the floccule is discharged through the drain pipe (3).