CN108159743A - Sedimentation pond for water treatment - Google Patents

Abstract

The invention relates to a water treatment sedimentation tank, which is provided with a sedimentation tank body, and the interior of the sedimentation tank body is sequentially arranged as a clear water area, a sediment separation area, a transition area, a sludge area and a seepage area from top to bottom. There is a water inlet and distribution device inside, a water outlet device on the upper part of the clear water area, a mechanical room under the middle of the sludge area of the sedimentation tank, and a water seepage device between the mechanical room below the sludge area and the inner wall of the tank. The sedimentation tank is also equipped with a sedimentation sludge cleaning device. The invention is easy to operate, directly uses the gravity of the sludge that has lost its fluidity to squeeze the sludge for dehydration, and uses the sedimentation sludge cleaning device to remove the dehydrated sludge. outside the sedimentation tank.

Description

Water Treatment Sedimentation Tank

technical field

The invention relates to the field of sewage purification, in particular to a water treatment sedimentation tank.

Background technique

At present, most of the sedimentation tanks (including clarifiers) commonly used in the water treatment industry to settle sludge are discharged by hydraulic sludge discharge methods. Since the discharged sludge is fluid and has a very high water content, the discharged sludge must be dehydrated. In most cases, it is necessary to add expensive sludge dehydrating agents (such as cationic polypropylene) to the discharged sludge. amide, etc.), to make the added polymer agent react with the sludge to produce large flocs that are easy to dehydrate, and then dehydrate the sludge with a sludge dehydrator such as a centrifuge to form sludge or soil with a low moisture content . Such a sludge treatment process is both cumbersome and uneconomical, requiring large equipment investment and high treatment costs.

However, most of the coal slime deposited in the sedimentation tanks for processing coal slime water in thermal power plants, coal mines and other industries use a grab machine to fish out the slime from the water up and down to the lower part of the sedimentation tank, and use the grab machine to fish out the mud from the sedimentation tank, which is serious. It greatly affects the sedimentation efficiency of the slime water sedimentation tank, and the effluent quality of the sedimentation tank is very poor. The effluent from the sedimentation tank must be treated with chemicals before it can be used or discharged. This not only wastes a lot of medicine, but also wastes a lot of manpower and material resources.

The patent number is 201620103936.1, and the name is a sedimentation tank disclosed by a patent of a sedimentation tank. The sedimentation tank uses a scraper to scrape the settled sludge from the sludge inside the inner wall of the sedimentation tank to the center of the bottom of the tank, but due to the sludge formed after sedimentation The sludge layer is relatively dense and has a certain pressure. Therefore, in practical applications, the scraper is bent and unable to move, and the sludge cannot be scraped layer by layer from the bottom of the pool to the center of the bottom of the pool. In practical applications, the sedimentation The pool was not usable at all.

Contents of the invention

The technical problem to be solved by the present invention is to provide a settling tank which is reasonable in design, convenient in use and very easy to remove sludge from the water treatment settling tank, aiming at the deficiencies of the prior art.

The technical problem to be solved by the present invention is achieved through the following technical solutions. The present invention is a sedimentation tank for water treatment. area, sediment separation area, transition area, sludge area and seepage area; in the transition area of the sedimentation tank, there is a water distribution device, in the upper part of the clear water area, there is a water outlet device, and in the middle of the sludge area of the sedimentation tank, there is a mechanical room, a water seepage device is provided between the mechanical room below the sludge area and the inner wall of the tank, and a sedimentation sludge cleaning device is also provided in the sedimentation tank; the sedimentation sludge cleaning device includes a Sludge collection room, the upper end of the sludge collection room is open. The sludge collection room is equipped with a sludge output device that transports the sludge to the outside of the sedimentation tank. There is a small scraper mechanism for scraping the sludge into the sludge collection chamber, and a large scraper mechanism for pushing the sludge to the center of the sedimentation tank above the sludge area. The large scraper mechanism and the small scraper mechanism pass through The same rotary drive mechanism drives the rotation, and the upper part of the sedimentation tank body is provided with an up and down motion drive mechanism that drives the large scraper mechanism to move up and down.

The technical problem to be solved by the present invention can be further realized by the following technical solutions. The water inlet distribution device includes a diversion chamber arranged at the center of the sedimentation tank and a raw water inlet pipe connected to the top of the diversion chamber. The diversion chamber is composed of two coaxially arranged inner cylinders and outer cylinders. The lower part of the inner cylinder is provided with a baffle plate that is folded toward the outer cylinder, forming an umbrella shape at the bottom of the diversion chamber. The water outlet and the umbrella-shaped water outlet are located at the lower part of the sedimentation separation area.

The technical problem to be solved by the present invention can be further realized by the following technical solutions. The water outlet device includes an annular floating sump floating on the upper part of the clear water area, a water outlet hose, a water outlet fixed pipe and the lowest position limit of the annular floating sump. The floating sump includes an annular floating sump and an annular sump. The outer lower part of the sump is provided with several small water inlet and water collection holes on the same horizontal plane and submerged below the water surface along the outer lower part of the sump. The bottom of the water tank is provided with a water outlet, and the fixed water outlet pipe is set under the clear water area and protrudes from the wall of the sedimentation tank body, and the water outlet hose is arranged between the water outlet of the water collection tank and the water outlet fixed pipe; The limit erection is set in the clear water area above the water outlet fixed pipe.

The technical problem to be solved by the present invention can also be further realized through the following technical solutions. The water seepage device includes a sandstone filter layer and a sandstone cushion layer arranged sequentially from top to bottom, and the sandstone cushion layer is pre-embedded with The main branch pipe drainage device, the main branch pipe drainage device includes the main pipe embedded in the sandstone cushion and several branch pipes, the several branch pipes are connected with the main pipe, each branch pipe is provided with a water inlet hole, and the water outlet of the main pipe is The end extends out of the sedimentation tank body, and a drain valve is installed on the main pipe extending out of the sedimentation tank body.

The filter particle size range of the sand filter layer is 0.5mm-2mm, and the height of the sand filter layer is 0.3m-1.2m. The sand cushion layer is composed of 5 layers, and the particle size range of each layer from top to bottom is The order is 2mm-4mm, 4mm-8mm, 8mm-16mm, 16mm-32mm, 32mm-64mm, of which the height of each of the upper 4 layers is about 10cm, and the height of the bottom layer is 30-50cm.

The technical problem to be solved by the present invention can also be further realized through the following technical solutions. The described rotary drive mechanism is provided with a main shaft vertically arranged in the mechanical chamber and an auxiliary hollow shaft arranged on the top of the sedimentation tank body. The center of the bottom of the collection chamber passes through the sludge collection chamber, and a large scraper slide rail is provided between the main shaft and the auxiliary hollow shaft. The small scraper mechanism is fixed on the upper end of the main shaft, and a driving mechanism for driving the main shaft to rotate is provided in the mechanical room; The small scraper mechanism includes a connecting circular plate fixed horizontally on the upper end of the main shaft, a support plate whose root is fixed on the outer edge of the connecting circular plate, and a small scraper attached to the inner edge of the supporting plate. The horizontal section formed by the connected and vertically arranged small scrapers attached to the inner edge of the support plate is an involute structure. Any vertical surface on the inner surface of the small scrapers passes through the sludge collection chamber. The angle between any point on the inner surface of the scraper and the plane determined by the axis of the main shaft and the inner surface of the scraper is greater than 90 degrees, the lower edge of the small scraper is in the same horizontal plane and the height of the small scraper gradually decreases from the inside to the outside.

The technical problem to be solved by the present invention can also be further realized through the following technical solutions. The large scraper mechanism is provided with a block pulley device and two large scrapers horizontally and symmetrically fixed on both sides of the bottom of the block pulley device; The scraper includes a cross arm, on the lower surface of the cross arm there are evenly arranged several vertically arranged scrapers along its length direction, the angle between the scraper and the cross arm is greater than 90° at the front center side of the rotation direction. The height of the scraper gradually decreases from the center between the two cross arms to the outside one by one from left to right, and the scrapers on the left cross arm are numbered 1, 3, 5, 7... from the center to the outside. X-1 Arranged in odd numbers, the scrapers on the right cross arm are numbered 2, 4, 6, 8...X even numbers from the center outward, No. 1 scraper is at the innermost end, and No. X scraper is at the outermost end; during the rotation of the cross arm, the radius of the track circle at the front end of No. X-1 scraper is slightly larger than the radius of the track circle at the rear end of No. X scraper; The gap between the walls is 8cm-12cm.

Use R _X to indicate the radius of the circle where the front end of No. X scraper is located, and H _X to indicate the height of No. X scraper. The dimensions of two adjacent scrapers satisfy the following relationship:

(πR _X ² -πR _X-1 ² )H _X = (πR _X-1 ² -πR _X-2 ² )(H _X-1 -H _X )

It is also possible to connect No. 1 scraper, No. 2 scraper, No. 3 scraper, ,,,,, X scraper end-to-end to form an involute from inside to outside.

The technical problem to be solved by the present invention can also be further realized through the following technical solutions. The described large scraper slide rail is a track composed of two parallel channel steels with notches facing outwards, and the distance between the two tracks is slightly It is larger than the pulley diameter of the pulley block device; the two rails are vertically fixed above the connecting circular plate of the small scraper mechanism, and their tops are respectively fixed on both sides of the lower part of the auxiliary hollow shaft, and the axes of the main shaft and the auxiliary hollow shaft are symmetrical to the two rails The center line is on the central axis of the sedimentation tank.

The technical problem to be solved by the present invention can also be further realized by the following technical solutions. The pulley block device is provided with two vertical and parallel steel columns, and a For pulleys, each pair of pulleys is connected by a pulley shaft, and the two ends of the pulley shaft are fixed on the steel column. The rim of the pulley is set outward, and the angle between the outer edge of the pulley and the rolling surface of the pulley is slightly greater than 90 degrees The channel steel of the scraper slide rail is occluded at right angles to prevent the pulley block device from deviating from the track, and to ensure that the left and right large scrapers are always in a horizontal state during the rotating mud scraping process.

The technical problem to be solved by the present invention can be further realized through the following technical proposals. The up-and-down movement drive mechanism is provided with a steel wire rope for lifting the pulley block device, a breaking joint for preventing the twisting of the steel wire rope, and a wire rope pulling device; The joint is equipped with a bearing shell, a thrust bearing and a rotating shaft. The upper end of the lower steel wire rope is connected to the rotating shaft of the breaking joint, and the lower end of the lower steel wire is connected to the center of the pulley shaft on the pulley block device of the large scraper mechanism; the lower end of the upper steel wire rope is connected to the bearing shell of the breaking joint. body connection, the upper steel wire rope passes through the center of the auxiliary hollow shaft and connects with the pulling and releasing wire rope device. The pull-and-release wire rope device pulls up or puts down the large scraper by pulling up or putting down the wire rope, and the wire rope will not be pulled up or broken during this process.

The technical problem to be solved by the present invention can also be further realized by the following technical solutions. The sludge output device includes one or two screw conveyors. When the sludge output device is two screw conveyors, a second A screw conveyor and a second screw conveyor used in conjunction with the first screw conveyor; the first screw conveyor is provided with a sludge inlet and an outlet, the sludge inlet is located in the sludge collection chamber, and the sludge outlet is located in the Outside the sedimentation tank body; the sludge inlet at the lower end of the second screw conveyor is docked with the sludge outlet of the first screw conveyor, and the upper end of the second screw conveyor is provided with a sludge outlet higher than the sedimentation tank body.

In the case of stopping the operation of the sedimentation tank and emptying the water in the tank, the sludge can be discharged only by installing and using the first screw conveyor alone; in the case of not stopping the operation of the sedimentation tank, it is necessary to use the first screw conveyor in combination And the second screw conveyor can discharge the sludge in the pool.

Raw water enters the diversion chamber from the raw water inlet pipe, passes through the umbrella-shaped water outlet of the diversion chamber, and enters the sedimentation and separation area of the sedimentation tank evenly. After the water passes through the sedimentation and separation area, the clean water flows upward into the clean water area. The clear water enters the water collection tank through the water inlet and water collection holes of the floating water collection tank. The clear water collected in the sump flows out through the water outlet hose, the water outlet fixed pipe and the water outlet valve in sequence. The sludge separated from the sedimentation and separation zone is deposited in the sludge zone above the seepage zone after passing through the transition zone to form a sludge layer.

When the height of the sludge layer reaches a certain height, close the water inlet valve on the raw water inlet pipe to stop the water inlet and clean up the sludge. After stopping the water intake, the water outlet valve continues to fully open, and the floating sump falls with the water level drop and discharges the clear water from the upper part. When the water outlet is not clear, close the water outlet valve to stop the outward drainage through the floating sump.

Open the drain valve on the water seepage device, the turbid water in the sedimentation tank will flow out through the sand filter layer of the water seepage device, sand and gravel cushion and the drainage device of the main branch pipe. After restarting, it is transported to the sedimentation tank for reprocessing. When the water level of the sedimentation tank falls below the minimum position limit of the floating sump, the floating sump is horizontally parked on the minimum position limit frame of the floating sump. After the turbid water in the sedimentation tank is drained through the water seepage device, the sedimentation sludge cleaning device is started to carry out sludge cleaning.

Start the first screw conveyor and the rotary drive mechanism in turn, and the rotary drive mechanism drives the small scraper mechanism and the large scraper mechanism to rotate in the specified direction, and the small scraper scrapes the sludge above the small scraper into the sludge collection chamber and passes through the second A screw conveyor transports the sludge to the outside of the pool. After the sludge above the small scraper is cleaned, the drive mechanism for the up and down motion of the large scraper is activated to make the large scraper move downward at a certain speed, and the large scraper scrapes the sludge one by one. Scrape into the top of the small scraper layer by layer, and then the small scraper scrapes the sludge above into the sludge collection chamber and transports the sludge out of the pool through the first screw conveyor. When the blade of the big scraper approaches the small scraper When the plate is on the plate, the driving mechanism for the up and down movement of the large scraper works in reverse to pull the large scraper back to the lower part of the water outlet fixed pipe and close to the water outlet fixed pipe.

Open the valve on the raw water inlet pipe of the sedimentation tank. After the water level of the sedimentation tank reaches the highest position and the water in the clear water area is clear, open the outlet valve of the fixed water outlet pipe to put the sedimentation tank back into operation.

If sludge is removed from the settling tank while it is in operation, a second auger is required

The conveyor is to connect the inlet of the second screw conveyor with the outlet of the first screw conveyor, and jointly use the first screw conveyor and the second screw conveyor to clean up the sludge.

During the operation of the sedimentation tank, when the height of the sludge layer reaches the set height, the operation of the second screw conveyor, the first screw conveyor and the rotating drive mechanism and the up and down movement of the large scraper are started in sequence to remove the sludge from the sedimentation tank. Drain out of pool. When the height of the sludge layer drops to the set height, the rotation drive mechanism, the first screw conveyor and the second screw conveyor are stopped in sequence.

Compared with the prior art, the present invention is easy to operate, and directly utilizes the self-gravity of the sludge that has lost fluidity to extrude the sludge to dehydrate the sludge, and then transports the sludge to the outside of the sedimentation tank through the cleaning device.

Description of drawings

Fig. 1 is a kind of structural representation of the present invention;

Figure 2 is a schematic front view of the structure of the large scraper mechanism;

Figure 3 is a schematic top view of the structure of the large scraper mechanism;

Fig. 4 is a kind of structural representation of rotary driving mechanism;

Figure 5 is a schematic top view of the small scraper mechanism;

Fig. 6 is a kind of structural representation of floating sump;

Fig. 7 is a partial structural schematic diagram of the driving mechanism for the up and down movement of the large scraper;

Fig. 8 is a structural schematic diagram of two screw conveyors used in combination to discharge sludge.

Detailed ways

The specific technical solutions of the present invention will be further described below with reference to the accompanying drawings, so that those skilled in the art can further understand the present invention, without limiting their rights.

Referring to Fig. 1-8, a water treatment sedimentation tank is provided with a vertical sedimentation tank body 1, the sedimentation tank body 1 is cylindrical, and can also be a shape such as a cuboid, and the interior of the sedimentation tank body 1 is sequentially arranged from top to bottom. It is set as clear water area 2, sedimentation separation area 3, transition area 4, sludge area 5 and seepage area 6. In the sedimentation separation area, a water inlet and distribution device 7 is provided, and a water outlet device 8 is provided at the upper part of the clear water area. A mechanical room 9 and a sedimentation sludge cleaning device 10 are provided below the area. A water seepage area 6 is provided between the mechanical chamber 9 under the sludge area 5 and the inner wall of the pool body 1, and a water seepage device 11 is provided in the water seepage area.

The water inlet distribution device includes a diversion chamber 7 arranged at the center of the sedimentation tank and a raw water inlet pipe 21 connected to the top of the diversion chamber 7, and the diversion chamber 7 is composed of two coaxially arranged inner cylinders 23 Set up with the outer cylinder 24, the lower part of the inner cylinder 23 is provided with a baffle plate 25 that is folded toward the outer cylinder 24, and an umbrella-shaped water outlet 22 is formed at the bottom of the diversion chamber 7. The umbrella-shaped water outlet 22 The position is set at the lower part of the precipitation separation zone 3.

The water outlet device 8 includes an annular floating sump 26 floating on the top of the clear water area 2, a water outlet hose 31, a water outlet fixed pipe 32 and a limit frame 33 at the lowest position of the annular floating sump. The annular floating sump 26 includes Annular floating tank 27 and annular sump 28, the outer lower part of sump 28 is provided with several water inlet and water collection holes 29 on the same level and submerged below the water surface along its perimeter direction, and the bottom of sump 28 is provided with Water outlet 30, described water outlet fixed pipe 32 is arranged at the bottom of clean water area 2 and stretches out the pool wall of sedimentation tank body 1, and water outlet hose 31 is arranged between sump water outlet 30 and water outlet fixed pipe 32, and water outlet fixed pipe 32 A water outlet valve is installed on the top. The lowest position limit frame 33 of the annular floating sump is located in the clear water area 2 above the water outlet fixed pipe 32. The lowest position limit frame 33 of the annular floating sump can be made of steel plate and fixed on the inner wall of the sedimentation tank. The annular floating tank 27 can also be made of a hollow pipe etc., and the annular water collecting tank 28 can also be arranged in the annular floating tank 27 .

The water seepage device 11 includes a sandstone filter layer 12 and a sandstone cushion layer 13 arranged sequentially from top to bottom, and a parent branch pipe drainage device 14 is pre-embedded in the sandstone cushion layer 13. The main pipe 15 and some branch pipes in the sandstone cushion layer, some branch pipes are connected with the main pipe 15, and each branch pipe is provided with water inlet holes, and the water outlet end of the said main pipe 15 stretches out from the sedimentation tank body 1. Outlet valve is housed on the main pipe that stretches out sedimentation tank body 1.

The filter particle size range of the sand filter layer 12 is 0.5mm-2mm, the height of the sand filter layer 12 is 0.3m-1.2m, and the sand cushion layer 13 is composed of 5 layers, each layer from top to bottom The particle size ranges are 2mm-4mm, 4mm-8mm, 8mm-16mm, 16mm-32mm, 32mm-64mm, the height of each of the upper 4 layers is 10cm, and the height of the bottom layer is 40cm.

The settling sludge clearing device 10 includes a sludge collection chamber 16 arranged on the top of the machine room 9, the upper end of the sludge collection chamber 16 is open, and the sludge collection chamber 16 is provided with a sludge transporter to the outside of the sedimentation tank. The sludge output device 17, the sludge output device 17 includes one or two screw conveyors, the first screw conveyor 41 and the first screw conveyor are provided when the sludge output device is two screw conveyors The second screw conveyor 40 used in conjunction with the screw conveyor 41; the first screw conveyor 41 is provided with a sludge inlet and an outlet 43, the sludge inlet is located in the sludge collection chamber 16, and the sludge outlet 43 is located in Outside the sedimentation tank body 1; the sludge inlet at the lower end of the second screw conveyor 40 is docked with the sludge outlet 43 of the first screw conveyor 41, and the upper end of the second screw conveyor 40 is provided with sludge higher than the sedimentation tank body 1 Export. In the case of stopping the operation of the sedimentation tank and emptying the water in the tank, the sludge can be discharged only by installing and using the first screw conveyor 41 alone; without stopping the operation of the sedimentation tank, it is necessary to use the first screw conveyor in combination Machine 41 and the second screw conveyor 40 can discharge the sludge in the pool together.

At the bottom of the sludge area 5, just above the sludge collection chamber 16, there is a small scraper mechanism 18 that scrapes the sludge into the sludge collection chamber 16. The large scraper mechanism 19 at the center of the pool body, the large scraper mechanism 19 and the small scraper mechanism 18 are driven to rotate 20 in a specified direction through the same rotary drive mechanism, and the upper part of the sedimentation tank body 1 is provided with a driving large scraper mechanism 19 up and down. Movement of the up and down motion drive mechanism.

The rotary drive mechanism 20 is provided with a main shaft 34 vertically arranged in the mechanical chamber 9 and an auxiliary hollow shaft 38 arranged on the top of the sedimentation tank body 1. The main shaft 34 passes through the sludge collection chamber from the bottom center of the sludge collection chamber, A large scraper slide rail 36 is arranged between the main shaft 34 and the auxiliary hollow shaft 38, the small scraper mechanism 18 is fixed on the upper end of the main shaft 34, and a driving mechanism for driving the main shaft 34 to rotate is provided in the machine room 9. The drive mechanism includes a bull gear connected to the main shaft 34 through a bearing, and the bull gear is connected to the reduction motor through a pinion. The driving mechanism can also be installed above the settling tank body, and rotate by driving the auxiliary hollow shaft 38, as shown in Figure 7 .

The small scraper mechanism 18 includes a connecting circular plate 39 horizontally fixed on the upper end of the main shaft, a support plate 35 whose root is fixed on the outer edge of the connecting circular plate 39, and a small scraper 42 attached to the inner edge of the supporting plate 35. The scraper 42 is composed of several sections of end-to-end and vertically arranged small scrapers attached to the inner edge of the support plate 35. The horizontal section is an involute structure. The surfaces all pass through the sludge collection chamber, the angle between any point on the inner surface of the small scraper 42 and the plane determined by the axis of the main shaft and the inner surface of the scraper is greater than 90 degrees, and the lower edge of the small scraper 42 is in the same horizontal plane and is small The height of the scraper 42 gradually decreases from the inside to the outside.

The large scraper mechanism 19 is provided with a pulley block device 44 and two large scraper plates 37 fixed horizontally and symmetrically on both sides of the bottom of the pulley block device; Several vertically arranged scrapers 46 are evenly arranged along its length direction, and the angle between the scrapers 46 and the cross arm 47 at the front center side of the rotation direction is larger than 90°. The height of the scraper 46 gradually decreases from the center between the two cross arms 47 to the outside, left and right, and the scrapers on the left cross arm are numbered 1, 3, 5, 7 from the center to the outside. ...X-1 is arranged in odd numbers, and the scrapers on the right cross arm are numbered 2, 4, 6, 8...X even numbers from the center to the outside, No. 1 scraper is at the innermost end, and No. X scraper is at the The outermost end; during the rotation of the cross arm, the radius of the track circle at the front end point of No. X-1 scraper is slightly larger than the radius of the track circle at the rear end point of No. X scraper; the length of the left and right large scrapers is equal and the outer end is the same as the precipitation The gap between the inner walls of the pool is 8cm-12cm.

Use R _X to indicate the radius of the circle where the front end of No. X scraper is located, and H _X to indicate the height of No. X scraper. The dimensions of two adjacent scrapers satisfy the following relationship:

(πR _X ² -πR _X-1 ² )H _X = (πR _X-1 ² -πR _X-2 ² )(H _X-1 -H _X )

It is also possible to connect No. 1 scraper, No. 2 scraper, No. 3 scraper, ,,,,, X scraper end-to-end to form an involute from inside to outside.

Described big scraper slide rail 36 is the track that two channel steels that are parallel and notch outwards constitute, and the distance between two tracks is slightly larger than the pulley diameter of pulley block device 44; Described two tracks are erected and fixed on Above the connecting circular plate 39 of the small scraper mechanism 18, their tops are respectively fixed on both sides of the lower part of the auxiliary hollow shaft 38, and the axes of the main shaft 34 and the auxiliary hollow shaft 38 are on the central axis of the sedimentation tank body 1 along with the symmetrical centerlines of the two tracks. .

The pulley block device 44 is provided with two vertical and parallel steel columns, a pair of pulleys are respectively installed between the upper and lower parts of the two steel columns, each pair of pulleys is connected by a pulley shaft, and the two ends of the pulley shaft Fixed on the steel column, the rim of the pulley is set outward, and the angle between the outer edge of the pulley and the rolling surface of the pulley is slightly greater than 90 degrees and is engaged with the channel steel of the large scraper slide rail at right angles to prevent the pulley block device 44 from deviating from the track, ensuring The left and right large scrapers are always in a horizontal state during the rotary mud scraping process.

Described up and down movement driving mechanism is provided with the wire rope 45 of hoisting pulley block device 44, the broken strength joint 46 that prevents steel wire rope from twisting and pulls and puts wire rope device 47; Described broken strength joint 46 is provided with bearing housing, thrust bearing and rotating shaft, The upper end of the lower steel wire rope is connected to the shaft of the breaking joint, and the lower end of the lower steel rope is connected to the center of the pulley shaft on the pulley block device 44 of the large scraper mechanism 19; After passing through, it is connected with the pulling and releasing wire rope device. Pulling and releasing wire rope device 47 pulls up or puts down the large scraper mechanism by pulling up or putting down steel wire rope 45, and steel wire rope can not exert force or break strength in this process.

Claims (10)

1. A water treatment settling tank is characterized in that: a settling tank body is provided, and the inside of the settling tank body is set to a clear water area, a sedimentation separation area, a transition area, a sludge area and a seepage area from top to bottom; There is a water inlet and distribution device in the transition area of the tank, a water outlet device in the upper part of the clear water area, a mechanical room under the middle of the sludge area of the sedimentation tank, and a water seepage between the mechanical room below the sludge area and the inner wall of the tank. device, the sedimentation tank is also provided with a sedimentation sludge removal device; the sedimentation sludge removal device includes a sludge collection chamber located on the upper part of the mechanical room, the upper end of the sludge collection chamber is open, and the sludge collection chamber There is a sludge output device that transports the sludge to the outside of the sedimentation tank. A small scraper mechanism is installed at the bottom of the sludge area and directly above the sludge collection chamber to scrape the sludge into the sludge collection chamber. Above the mud area is a large scraper mechanism that pushes the sludge to the center of the sedimentation tank body. The large scraper mechanism and the small scraper mechanism are driven to rotate by the same rotary drive mechanism, and a large scraper is installed on the upper part of the sedimentation tank body The up and down motion driving mechanism for the mechanism to move up and down. 2. The water treatment sedimentation tank according to claim 1, characterized in that: the water inlet distribution device includes a diversion chamber arranged at the center of the sedimentation tank and a raw water inlet pipe connected to the top of the diversion chamber, the The diversion chamber is composed of two coaxially arranged inner cylinders and outer cylinders. The lower part of the inner cylinder is provided with a baffle plate that is folded toward the outer cylinder, forming an umbrella shape at the bottom of the diversion chamber. The water outlet and the umbrella-shaped water outlet are located at the lower part of the sedimentation separation area. 3. The water treatment sedimentation tank according to claim 1, characterized in that: the water outlet device includes an annular floating sump floating on the upper part of the clear water area, an outlet hose, a water outlet fixed pipe and the lowest position limit of the annular floating sump. The floating sump includes an annular floating sump and an annular sump. The outer lower part of the sump is provided with several small water inlet and water collection holes on the same horizontal plane and submerged below the water surface along the outer lower part of the sump. The bottom of the water tank is provided with a water outlet, and the fixed water outlet pipe is set under the clear water area and protrudes from the wall of the sedimentation tank body, and the water outlet hose is arranged between the water outlet of the water collection tank and the fixed water outlet pipe; The limit erection is set in the clear water area above the water outlet fixed pipe. 4. The water treatment sedimentation tank according to claim 1, characterized in that: the water seepage device comprises a sandstone filter layer and a sandstone cushion layer arranged sequentially from top to bottom, and the sandstone cushion layer is pre-embedded with The main branch pipe drainage device, the main branch pipe drainage device includes the main pipe embedded in the sandstone cushion and several branch pipes, the several branch pipes are connected with the main pipe, each branch pipe is provided with a water inlet hole, and the water outlet of the main pipe is The end extends out of the sedimentation tank body, and a drain valve is installed on the main pipe extending out of the sedimentation tank body. 5. The water treatment sedimentation tank according to claim 1, characterized in that: said rotary drive mechanism is provided with a main shaft vertically arranged in the mechanical chamber and an auxiliary hollow shaft arranged at the top of the sedimentation tank body, the main shaft is driven from the sludge The center of the bottom of the collection chamber passes through the sludge collection chamber, and a large scraper slide rail is provided between the main shaft and the auxiliary hollow shaft. The small scraper mechanism is fixed on the upper end of the main shaft, and a driving mechanism for driving the main shaft to rotate is provided in the mechanical room; The small scraper mechanism includes a connecting circular plate fixed horizontally on the upper end of the main shaft, a support plate whose root is fixed on the outer edge of the connecting circular plate, and a small scraper attached to the inner edge of the supporting plate. The horizontal section formed by the connected and vertically arranged small scrapers attached to the inner edge of the support plate is an involute structure. Any vertical surface on the inner surface of the small scrapers passes through the sludge collection chamber. The angle between any point on the inner surface of the scraper and the plane determined by the axis of the main shaft and the inner surface of the scraper is greater than 90 degrees, the lower edge of the small scraper is in the same horizontal plane and the height of the small scraper gradually decreases from the inside to the outside. 6. The water treatment sedimentation tank according to claim 5, characterized in that: the large scraper mechanism is provided with a pulley block device and two horizontally symmetrical large scrapers fixed on both sides of the bottom of the pulley block device; The large scraper includes a cross arm, on the lower surface of the cross arm, several vertically arranged scrapers are evenly arranged along its length direction, and the angle between the scraper and the cross arm is greater than 90° on the front center side of the rotation direction ; The height of the scraper gradually decreases from the center between the two cross arms to the outside one by one from left to right, and the scrapers on the left cross arm are numbered 1, 3, 5, 7... from the center to the outside. X-1 Arranged in odd numbers, the scrapers on the right cross arm are numbered 2, 4, 6, 8...X even numbers from the center outward, No. 1 scraper is at the innermost end, and No. X scraper is at the outermost end; during the rotation of the cross arm, the radius of the track circle at the front end of No. X-1 scraper is slightly larger than the radius of the track circle at the rear end of No. X scraper; The gap between the walls is 8cm-12cm. 7. The water treatment sedimentation tank according to claim 6, characterized in that: said large scraper slide rail is two parallel rails made of channel steel with notches facing outwards, and the distance between the two rails is slightly It is larger than the pulley diameter of the pulley block device; the two rails are vertically fixed above the connecting circular plate of the small scraper mechanism, and their tops are respectively fixed on both sides of the lower part of the auxiliary hollow shaft, and the axes of the main shaft and the auxiliary hollow shaft are symmetrical to the two rails The center line is on the central axis of the sedimentation tank. 8. The water treatment sedimentation tank according to claim 7, characterized in that: the pulley block device is provided with two vertical and parallel steel columns, and a steel column is respectively installed between the upper and lower parts of the two steel columns. For pulleys, each pair of pulleys is connected by a pulley shaft, and the two ends of the pulley shaft are fixed on the steel column. The rim of the pulley is set outward, and the angle between the outer edge of the pulley and the rolling surface of the pulley is slightly greater than 90 degrees Scraper slide channel steel right angle bite. 9. The water treatment sedimentation tank according to claim 8, characterized in that: said up and down motion driving mechanism is provided with a wire rope for lifting the pulley block device, a breaking joint for preventing the twisting of the wire rope, and a wire rope pulling device; The joint is equipped with a bearing shell, a thrust bearing and a rotating shaft. The upper end of the lower steel wire rope is connected to the rotating shaft of the breaking joint, and the lower end of the lower steel wire is connected to the center of the pulley shaft on the pulley block device of the large scraper mechanism; the lower end of the upper steel wire rope is connected to the bearing shell of the breaking joint. body connection, the upper steel wire rope passes through the center of the auxiliary hollow shaft and connects with the pulling and releasing wire rope device. 10. The water treatment sedimentation tank according to claim 1, characterized in that: the sludge output device comprises one or two screw conveyors, and when the sludge output device is two screw conveyors, a second screw conveyor is provided. A screw conveyor and a second screw conveyor used in conjunction with the first screw conveyor; the first screw conveyor is provided with a sludge inlet and an outlet, the sludge inlet is located in the sludge collection chamber, and the sludge outlet is located in the Outside the sedimentation tank body; the sludge inlet at the lower end of the second screw conveyor is docked with the sludge outlet of the first screw conveyor, and the upper end of the second screw conveyor is provided with a sludge outlet higher than the sedimentation tank body.