CN108159743B - Water treatment sedimentation tank - Google Patents
Water treatment sedimentation tank Download PDFInfo
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- CN108159743B CN108159743B CN201810092794.7A CN201810092794A CN108159743B CN 108159743 B CN108159743 B CN 108159743B CN 201810092794 A CN201810092794 A CN 201810092794A CN 108159743 B CN108159743 B CN 108159743B
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- sludge
- sedimentation tank
- water
- tank body
- scraping
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 173
- 238000004062 sedimentation Methods 0.000 title claims abstract description 107
- 239000010802 sludge Substances 0.000 claims abstract description 122
- 238000000926 separation method Methods 0.000 claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims abstract description 9
- 239000013049 sediment Substances 0.000 claims abstract description 9
- 230000007704 transition Effects 0.000 claims abstract description 8
- 238000007790 scraping Methods 0.000 claims description 79
- 229910000831 Steel Inorganic materials 0.000 claims description 35
- 239000010959 steel Substances 0.000 claims description 35
- 238000007667 floating Methods 0.000 claims description 21
- 239000004576 sand Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012024 dehydrating agents Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/02—Settling tanks with single outlets for the separated liquid
- B01D21/04—Settling tanks with single outlets for the separated liquid with moving scrapers
- B01D21/06—Settling tanks with single outlets for the separated liquid with moving scrapers with rotating scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0012—Settling tanks making use of filters, e.g. by floating layers of particulate material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0087—Settling tanks provided with means for ensuring a special flow pattern, e.g. even inflow or outflow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/2405—Feed mechanisms for settling tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/2444—Discharge mechanisms for the classified liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/245—Discharge mechanisms for the sediments
Abstract
The invention relates to a water treatment sedimentation tank, which is provided with a sedimentation tank body, wherein the interior of the sedimentation tank body is sequentially provided with a clear water area, a sedimentation separation area, a transition area, a sludge area and a seepage area from top to bottom, a water inlet distribution device is arranged in the transition area of the sedimentation tank, a water outlet device is arranged at the upper part of the clear water area, a mechanical chamber is arranged below the middle part of the sludge area of the sedimentation tank, a water seepage device is arranged between the mechanical chamber below the sludge area and the inner wall of the tank body, and a sediment sludge cleaning device is also arranged in the sedimentation tank.
Description
Technical Field
The invention relates to the field of sewage purification, in particular to a water treatment sedimentation tank.
Background
At present, a sedimentation tank (including a clarification tank) commonly used in the water treatment industry is used for sedimentation of sludge, and most of the sludge is discharged by a hydraulic sludge discharge method. Since the discharged sludge is fluid and has a very high water content, it is necessary to dehydrate the discharged sludge, and in most cases, an expensive sludge dehydrating agent (such as cationic polyacrylamide) is added to the discharged sludge to react the added polymer agent with the sludge to produce large-particle floc which is easily dehydrated, and then the sludge is dehydrated by a sludge dehydrator such as a centrifuge to form sludge or soil having a low water content. The sludge treatment process is complex, uneconomical, large in equipment investment and high in treatment cost.
Most of coal slime precipitated in sedimentation tanks for treating the coal slime in industries such as thermal power plants, coal mines and the like is fished out from the water to the lower part of the sedimentation tank by using a grab bucket machine, and the sediment is fished out from the sedimentation tank by using the grab bucket machine, so that the sedimentation efficiency of the coal slime sedimentation tank is seriously influenced, and the water quality of the water discharged from the sedimentation tank is very poor. The effluent of the sedimentation tank must be treated with chemicals to continue use or discharge. Thus, a large amount of medicaments are wasted, and a large amount of manpower and material resources are wasted.
Patent number 201620103936.1 is the sedimentation tank that patent publication of a sedimentation tank was named, and this sedimentation tank uses the scraper blade to scrape the mud that deposits from the mud within the sedimentation tank inner wall to the bottom of the pool center, but because the mud layer that forms after the mud deposits is more closely knit and has certain pressure, consequently takes place the scraper blade by bending unable removal in practical application, can not scrape into the bottom of the pool center with mud from the bottom of the pool layer upon layer scraping, and this sedimentation tank can not use at all in practical application.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the sedimentation tank which is reasonable in design, convenient to use and easy to clear out the sludge from the water treatment sedimentation tank.
The invention aims to solve the technical problems by adopting the following technical scheme, and is characterized by comprising a sedimentation tank body, wherein the interior of the sedimentation tank body is sequentially provided with a clear water zone, a sedimentation separation zone, a transition zone, a sludge zone and a water seepage zone from top to bottom; a water inlet and distribution device is arranged in the transition zone of the sedimentation tank, a water outlet device is arranged at the upper part of the clear water zone, a mechanical chamber is arranged below the middle part of the sludge zone of the sedimentation tank, a water seepage device is arranged between the mechanical chamber below the sludge zone and the inner wall of the tank body, and a sediment sludge cleaning device is also arranged in the sedimentation tank; the device is drawn clearly to sediment mud including establishing the mud collection room on machinery room upper portion, the uncovered setting in mud collection room upper end is equipped with the external mud output device of sedimentation tank with mud in the mud collection room, is equipped with the little scraper blade mechanism of scraping into mud collection room with mud in the bottom of mud district, directly over the mud collection room, is equipped with the big scraper blade mechanism that pushes away mud to sedimentation tank body central part in the top of mud district, big scraper blade mechanism and little scraper blade mechanism are rotatory through same rotary driving mechanism drive, is equipped with the up-and-down motion actuating mechanism of the big scraper blade mechanism up-and-down motion of drive on sedimentation tank body upper portion.
The technical problem to be solved by the invention can be further solved by the following technical scheme that the water inlet and distribution device comprises a diversion chamber arranged at the center of the sedimentation tank and a raw water inlet pipe connected with the top of the diversion chamber, wherein the diversion chamber is formed by sleeving two coaxially arranged inner cylinders and outer cylinders, a baffle plate which is turned over towards the outer cylinder is arranged at the lower part of the inner cylinders, an umbrella-shaped water outlet is formed at the bottom of the diversion chamber, and the umbrella-shaped water outlet is arranged at the lower part of the sedimentation separation area.
The technical problem to be solved by the invention can be further solved by the following technical scheme that the water outlet device comprises an annular floating water collecting tank, a water outlet hose, a water outlet fixed pipe and an annular floating water collecting tank lowest position limiting frame, wherein the annular floating water collecting tank and the annular water collecting tank are floated on the upper part of a clear water area, a plurality of water inlet water collecting small holes which are positioned on the same horizontal plane and are submerged below the water surface are arranged on the lower part of the outer side of the water collecting tank along the circumferential direction of the water outlet hose, the water outlet fixed pipe is arranged below the clear water area and extends out of the tank wall of the sedimentation tank body, and the water outlet hose is arranged between the water outlet of the water collecting tank and the water outlet fixed pipe; the lowest position limit frame of the annular floating water collecting tank is arranged in the clear water area above the water outlet fixed pipe.
The technical problem to be solved by the invention can be further solved by the following technical scheme, the water seepage device comprises a sand filtering layer and a sand cushion layer which are sequentially arranged from top to bottom, a main branch pipe drainage device is embedded in the sand cushion layer, the main branch pipe drainage device comprises a main pipe and a plurality of branch pipes which are embedded in the sand cushion layer, the plurality of branch pipes are connected with the main pipe, each branch pipe is provided with a water inlet hole, the water outlet end of the main pipe extends out of the sedimentation tank body, and a drain valve is arranged on the main pipe extending out of the sedimentation tank body.
The filter material granularity range of the sand and stone filter layer is 0.5mm-2mm, the height of the sand and stone filter layer is 0.3m-1.2m, the sand and stone cushion layer is composed of 5 layers, the granularity range of each layer from top to bottom is sequentially 2mm-4mm, 4mm-8mm, 8mm-16mm, 16mm-32mm and 32mm-64mm, wherein the height of each layer of the upper 4 layers is about 10cm, and the height of the lowest layer is 30-50cm.
The technical problem to be solved by the invention can be further solved by the following technical scheme that the rotary driving 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 passes through the sludge collection chamber from the center of the bottom of the sludge collection chamber, a large scraper slide rail is arranged between the main shaft and the auxiliary hollow shaft, a small scraper mechanism is fixed at the upper end of the main shaft, and a driving mechanism for driving the main shaft to rotate is arranged in the mechanical chamber; the small scraping plate mechanism comprises a connecting circular plate horizontally fixed at the upper end of the main shaft, a supporting plate with the root fixed at the outer edge of the connecting circular plate and a small scraping plate attached to the inner edge of the supporting plate, wherein the small scraping plate is formed by attaching a plurality of sections of small scraping plates which are connected end to end and vertically arranged on the inner edge of the supporting plate, the horizontal section of the small scraping plate is of an involute structure, any vertical surface on the inner surface of the small scraping plate passes through the sludge collection chamber, the included angle between any point on the inner surface of the small scraping plate and the plane determined by the axis of the main shaft and the inner surface of the scraping plate is larger than 90 degrees, the lower edge of the small scraping plate is positioned in the same horizontal plane, and the height of the small scraping plate is gradually reduced from inside to outside.
The technical problem to be solved by the invention can be further solved by the following technical scheme that the large scraper mechanism is provided with a pulley block device and two large scrapers which are horizontally and symmetrically fixed at two sides of the bottom of the pulley block device; the large scraping plate comprises a cross arm, a plurality of scraping blades which are vertically arranged are uniformly arranged on the lower surface of the cross arm along the length direction of the cross arm, and an included angle between the scraping blades and the cross arm at the front center side in the rotation direction is larger than 90 degrees. The heights of the scraping blades are alternately and gradually reduced from the center between the two cross arms to the outside, the scraping blades on the left cross arm are arranged in odd numbers of 1, 3, 5 and 7 … … X-1 from the center to the outside, the scraping blades on the right cross arm are arranged in even numbers of 2, 4, 6 and 8 … … X from the center to the outside, the number 1 scraping blade is at the innermost end, and the number X scraping blade is at the outermost end; the radius of the track circle of the front end point of the X-1 wiper blade is slightly larger than that of the track circle of the rear end point of the X wiper blade in the rotation process of the cross arm; the length of the left large scraper and the length of the right large scraper are equal, and the gap between the outer end and the inner wall of the sedimentation tank body is 8cm-12cm.
R X is used for representing the radius of a circle where the front end point of the X-th scraping blade is located, H X is used for representing the height of the X-th scraping blade, and the dimensions of two adjacent scraping blades meet the following relation:
（πRX 2-πRX-1 2 ）HX = （ πRX-1 2-πRX-2 2 ）（HX-1 -HX ）
the number 1 scraping blade, the number 2 scraping blade, the number 3 scraping blade, the number (V) scraping blade and the number (X) scraping blade can be connected end to form an involute from inside to outside.
The technical problem to be solved by the invention can be further solved by the following technical scheme that the large scraper slide rail is a track formed by two parallel channel steels with outwards-arranged notches, and the distance between the two tracks is slightly larger than the diameter of a pulley of the pulley block device; the two rails are vertically fixed above a connecting circular plate of the small scraper mechanism, the tops of the two rails are respectively fixed on two sides of the lower part of the auxiliary hollow shaft, and the axes of the main shaft and the auxiliary hollow shaft and the symmetrical central lines of the two rails are positioned on the central axis of the sedimentation tank.
The pulley block device is provided with two vertical steel columns which are arranged in parallel, a pair of pulleys are respectively arranged between the upper parts and the lower parts of the two steel columns, each pair of pulleys is connected through a pulley shaft, two ends of each pulley shaft are fixed on the steel columns, the rims of the pulleys are arranged outwards, the included angle between the outer edges of the pulleys and the rolling surfaces of the pulleys is slightly larger than 90 degrees and is engaged with the channel steel of the large scraper slide rail at right angles, the pulley block device is prevented from being separated from the track, and the left large scraper and the right large scraper are ensured to be always in a horizontal state in the rotating mud scraping process.
The technical problem to be solved by the invention can be further solved by the following technical scheme that the up-and-down motion driving mechanism is provided with a steel wire rope for lifting the pulley block device, a breaking joint for preventing the steel wire rope from twisting and a steel wire rope pulling and releasing device; the lower end of the lower steel wire rope is connected with the center of a pulley block device of the large scraper mechanism; the lower end of the upper steel wire rope is connected with the breaking joint bearing shell, and the upper steel wire rope passes through the center of the auxiliary hollow shaft and then is connected with the wire rope pulling and releasing device. The large scraper is pulled up or put down by the pulling-up and putting-down steel wire rope device, and the steel wire rope cannot be stressed or broken in the process.
The technical problem to be solved by the invention can be further solved by the following technical scheme that the sludge output device comprises one or two screw conveyors, and a first screw conveyor and a second screw conveyor matched with the first screw conveyor are arranged when the sludge output device is provided with the two screw conveyors; the first screw conveyor is provided with a sludge inlet and a sludge outlet, the sludge inlet is arranged in the sludge collecting chamber, and the sludge outlet is arranged outside the sedimentation tank body; the lower end sludge inlet of the second screw conveyor is in butt joint 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.
Under the condition of stopping the operation of the sedimentation tank and emptying water in the tank, the sludge can be discharged only by independently installing and using the first screw conveyor; under the condition that the operation of the sedimentation tank is not stopped, the first screw conveyor and the second screw conveyor are combined to discharge the sludge in the tank.
Raw water enters the diversion chamber from the raw water inlet pipe, uniformly enters a precipitation separation area of the precipitation tank after passing through an umbrella-shaped water outlet of the diversion chamber, and after precipitation separation of the water in the precipitation separation area, clear water flows upwards to enter a clear water area. Clear water enters the water collecting tank through the water inlet and collecting small holes of the floating water collecting tank. The clean water collected in the water collecting tank flows out through the water outlet hose, the water outlet fixed pipe and the water outlet valve in sequence. The sludge precipitated and separated from the precipitation and separation area is deposited to a sludge area above the water seepage area to form a sludge layer after passing through the transition area.
When the height of the sludge layer reaches a certain height, closing a water inlet valve on the raw water inlet pipe to stop water inlet, and cleaning the sludge. After stopping water inflow, the water outlet valve is continuously fully opened, and the floating water collecting tank falls along with the falling of the water level and discharges clear water at the upper part. When the water outlet is unclear, the water outlet valve is closed to stop draining water outwards through the floating water collecting tank.
And (3) opening a drain valve on the water seepage device, enabling turbid water in the sedimentation tank to flow out through a sand filtering layer, a sand cushion layer and a mother branch pipe drainage device of the water seepage device, collecting the flowing-out unclear water in the sewage tank, and conveying the clear sludge in the sedimentation tank into the sedimentation tank for reprocessing after the clear sludge in the sedimentation tank is restarted. When the water level of the sedimentation tank falls below the limit of the lowest position of the floating water collecting tank, the floating water collecting tank is horizontally parked on the limit of the lowest position of the floating water collecting tank. And after turbid water in the sedimentation tank is drained through the water seepage device, starting the sediment sludge cleaning device to clean the sludge.
The method comprises the steps of sequentially starting a first screw conveyor and a rotary driving mechanism, driving a small scraper mechanism and a large scraper mechanism to rotate according to a specified direction, scraping sludge above the small scraper into a sludge collecting chamber by the small scraper and conveying the sludge out of a pool through the first screw conveyor, after the sludge above the small scraper is cleaned, starting a large scraper up-down motion driving mechanism to enable the large scraper to move downwards at a certain speed, scraping the sludge into the upper part of the small scraper layer by the large scraper, scraping the sludge above the small scraper into the sludge collecting chamber by the small scraper again, conveying the sludge out of the pool through the first screw conveyor, and when the large scraper blade approaches the small scraper, pulling the large scraper back to the position below a water outlet fixing pipe by the large scraper up-down motion driving mechanism in a reverse mode.
And opening a valve on a raw water inlet pipe of the sedimentation tank, and opening a water outlet valve of a water outlet fixing pipe after the water level of the sedimentation tank reaches the highest position and the water in the clear water area is clear, so as to put the sedimentation tank into operation again.
If sludge is removed from the settling tank during operation of the settling tank, a second screw is required
And the conveyor, namely the inlet of the second screw conveyor is in butt joint with the outlet of the first screw conveyor, and the first screw conveyor and the second screw conveyor are used for sludge cleaning.
In the operation process of the sedimentation tank, when the height of the sludge layer reaches the set height, the second screw conveyor, the first screw conveyor, the rotary driving mechanism and the large scraper up-down motion driving mechanism are sequentially started to operate, so that the sludge is discharged from the sedimentation tank. When the height of the sludge layer is reduced to the set height, the rotary driving mechanism, the first screw conveyor and the second screw conveyor are stopped in sequence.
Compared with the prior art, the invention has convenient operation, directly utilizes the self gravity effect of the sludge losing fluidity to squeeze the sludge to dehydrate the sludge, and then conveys the sludge to the outside of the sedimentation tank through the cleaning device.
Drawings
FIG. 1 is a schematic diagram of a structure of the present invention;
FIG. 2 is a schematic front view of the structure of the large scraper mechanism;
FIG. 3 is a schematic top view of a large squeegee mechanism;
FIG. 4 is a schematic view of a rotary drive mechanism;
FIG. 5 is a schematic top view of a small squeegee mechanism;
FIG. 6 is a schematic view of a construction of a floating sump;
FIG. 7 is a schematic view of a partial structure of a large squeegee up-and-down motion drive mechanism;
FIG. 8 is a schematic view of a structure in which two screw conveyors are used in combination to discharge sludge.
Detailed Description
Specific embodiments of the invention will be further described below with reference to the accompanying drawings, in order to facilitate a further understanding of the invention by those skilled in the art, without limiting the scope of the claims thereto.
Referring to fig. 1-8, a water treatment sedimentation tank is provided with a sedimentation tank body 1 which is vertically arranged, wherein the sedimentation tank body 1 is cylindrical, can also be in a cuboid shape and the like, the interior of the sedimentation tank body 1 is sequentially provided with a clear water zone 2, a sedimentation separation zone 3, a transition zone 4, a sludge zone 5 and a water seepage zone 6 from top to bottom, a water inlet distribution device 7 is arranged in the sedimentation separation zone, a water outlet device 8 is arranged at the upper part of the clear water zone, and a mechanical chamber 9 and a sediment sludge cleaning device 10 are arranged below the sludge zone. A water seepage area 6 is arranged between the lower mechanical chamber 9 of the sludge area 5 and the inner wall of the tank body 1, and a water seepage device 11 is arranged in the water seepage area.
The water inlet and distribution device comprises a diversion chamber 7 arranged at the center of the sedimentation tank and a raw water inlet pipe 21 connected with the top of the diversion chamber 7, wherein the diversion chamber 7 is formed by sleeving an inner cylinder 23 and an outer cylinder 24 which are coaxially arranged, a baffle plate 25 which is turned over towards the outer cylinder 24 is arranged at the lower part of the inner cylinder 23, an umbrella-shaped water outlet 22 is formed at the bottom of the diversion chamber 7, and the umbrella-shaped water outlet 22 is arranged at the lower part of the sedimentation separation zone 3.
The water outlet device 8 comprises an annular floating water collecting tank 26, a water outlet hose 31, a water outlet fixed pipe 32 and an annular floating water collecting tank lowest position limiting frame 33 which float on the upper portion of the clear water area 2, wherein the annular floating water collecting tank 26 comprises an annular floating tank 27 and an annular water collecting tank 28, a plurality of water inlet water collecting small holes 29 which are positioned on the same horizontal plane and are submerged below the water surface are formed in the lower portion of the outer side of the water collecting tank 28 along the circumferential direction of the water collecting tank, a water outlet 30 is formed in the bottom of the water collecting tank 28, the water outlet fixed pipe 32 is arranged below the clear water area 2 and extends out of the tank wall of the sedimentation tank body 1, the water outlet hose 31 is arranged between the water outlet 30 of the water collecting tank and the water outlet fixed pipe 32, and a water outlet valve is arranged on the water outlet fixed pipe 32. The limiting frame 33 at the lowest position of the annular floating water collecting tank is arranged in the clean water area 2 above the water outlet fixed pipe 32, and the limiting frame 33 at the lowest position of the annular floating water collecting tank can be made of steel plates and fixed on the inner wall of the sedimentation tank body. The annular float bath 27 may be made of a hollow pipe or the like, and the annular water collecting tank 28 may be provided in the annular float bath 27.
The water seepage device 11 comprises a sand filtering layer 12 and a sand cushion layer 13 which are sequentially arranged from top to bottom, a female branch pipe drainage device 14 is pre-buried in the sand cushion layer 13, the female branch pipe drainage device 14 comprises a female pipe 15 pre-buried in the sand cushion layer and a plurality of branch pipes, the plurality of branch pipes are connected with the female pipe 15, water inlets are formed in each branch pipe, the water outlet end of the female pipe 15 extends out of the sedimentation tank body 1, and a drain valve is arranged on the female pipe extending out of the sedimentation tank body 1.
The granularity range of the filter material of the sand filter layer 12 is 0.5mm-2mm, the height of the sand filter layer 12 is 0.3m-1.2m, the sand cushion layer 13 is composed of 5 layers, the granularity range of each layer from top to bottom is sequentially 2mm-4mm, 4mm-8mm, 8mm-16mm, 16mm-32mm and 32mm-64mm, wherein the height of each layer of the upper 4 layers is 10cm, and the height of the lowest layer is 40cm.
The sediment sludge cleaning device 10 comprises a sludge collecting chamber 16 arranged at the upper part of a mechanical chamber 9, the upper end of the sludge collecting chamber 16 is opened, a sludge output device 17 for conveying sludge out of a sediment tank body is arranged in the sludge collecting chamber 16, the sludge output device 17 comprises one or two screw conveyors, and a first screw conveyor 41 and a second screw conveyor 40 matched with the first screw conveyor 41 are arranged when the sludge output device is two screw conveyors; the first screw conveyor 41 is provided with a sludge inlet and a sludge outlet 43, the sludge inlet is arranged in the sludge collecting chamber 16, and the sludge outlet 43 is arranged outside the sedimentation tank body 1; the lower end sludge inlet of the second screw conveyor 40 is in butt joint with the sludge outlet 43 of the first screw conveyor 41, and the upper end of the second screw conveyor 40 is provided with a sludge outlet higher than the sedimentation tank body 1. Under the condition of stopping the operation of the sedimentation tank and draining the water in the tank, the sludge can be discharged only by separately installing and using the first screw conveyor 41; the first screw conveyor 41 and the second screw conveyor 40 are used together to discharge sludge in the tank without stopping the operation of the settling tank.
The bottom of the sludge area 5 and the right upper part of the sludge collecting chamber 16 are provided with a small scraping plate mechanism 18 for scraping the sludge into the sludge collecting chamber 16, the upper part of the sludge area 5 is provided with a large scraping plate mechanism 19 for pushing the sludge to the central part of the sedimentation tank body, the large scraping plate mechanism 19 and the small scraping plate mechanism 18 are driven to rotate 20 in a specified direction through the same rotation driving mechanism, and the upper part of the sedimentation tank body 1 is provided with an up-and-down motion driving mechanism for driving the large scraping plate mechanism 19 to move up and down.
The rotary driving mechanism 20 is provided with a main shaft 34 vertically arranged in the mechanical chamber 9 and an auxiliary hollow shaft 38 arranged at the top of the sedimentation tank body 1, the main shaft 34 passes through the sludge collecting chamber from the center of the bottom of the sludge collecting 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 at the upper end of the main shaft 34, and a driving mechanism for driving the main shaft 34 to rotate is arranged in the mechanical chamber 9. The drive mechanism includes a large gear connected to the main shaft 34 through a bearing, and the large gear is connected to a reduction motor through a small gear. The drive mechanism may also be mounted above the sedimentation tank body by driving the auxiliary hollow shaft 38 in rotation, as shown in fig. 7.
The small scraper mechanism 18 comprises a connecting circular plate 39 horizontally fixed at the upper end of the main shaft, a supporting plate 35 with the root fixed at the outer edge of the connecting circular plate 39 and a small scraper 42 attached to the inner edge of the supporting plate 35, wherein the small scraper 42 is of an involute structure formed by a plurality of sections of small scrapers which are connected end to end and are vertically arranged and attached to the inner edge of the supporting plate 35, any vertical surface on the inner surface of the small scraper 42 passes through the sludge collection chamber, the included angle between a plane determined by any point on the inner surface of the small scraper 42 and the axis of the main shaft and the inner surface of the scraper is larger than 90 degrees, the lower edge of the small scraper 42 is positioned in the same horizontal plane, and the height of the small scraper 42 is gradually reduced from inside to outside.
The large scraper mechanism 19 is provided with a pulley block device 44 and two large scrapers 37 which are horizontally and symmetrically fixed on two sides of the bottom of the pulley block device; the large scraping plate 37 comprises a cross arm 47, a plurality of scraping blades 46 which are vertically arranged are uniformly arranged on the lower surface of the cross arm 47 along the length direction of the cross arm, and an included angle between the scraping blades 46 and the cross arm 47 at the front center side in the rotation direction is larger than 90 degrees. The height of the scraping blades 46 is gradually reduced from the center between the two cross arms 47 to the outside, the scraping blades on the left cross arm are arranged according to odd numbers of 1,3, 5 and 7 … … X-1 from the center to the outside, the scraping blades on the right cross arm are arranged according to even numbers of 2,4, 6 and 8 … … X from the center to the outside, the number 1 scraping blade is at the innermost end, and the number X scraping blade is at the outermost end; the radius of the track circle of the front end point of the X-1 wiper blade is slightly larger than that of the track circle of the rear end point of the X wiper blade in the rotation process of the cross arm; the length of the left large scraper and the length of the right large scraper are equal, and the gap between the outer end and the inner wall of the sedimentation tank body is 8cm-12cm.
R X is used for representing the radius of a circle where the front end point of the X-th scraping blade is located, H X is used for representing the height of the X-th scraping blade, and the dimensions of two adjacent scraping blades meet the following relation:
（πRX 2-πRX-1 2 ）HX = （ πRX-1 2-πRX-2 2 ）（HX-1 -HX ）
the number 1 scraping blade, the number 2 scraping blade, the number 3 scraping blade, the number (V) scraping blade and the number (X) scraping blade can be connected end to form an involute from inside to outside.
The large scraper slide rail 36 is a track formed by two parallel channel steel with outwards-arranged notches, and the distance between the two tracks is slightly larger than the diameter of a pulley of the pulley block device 44; the two tracks are vertically fixed above a connecting circular plate 39 of the small scraper mechanism 18, the tops of the two tracks are respectively fixed on two 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 and the symmetrical central lines of the two tracks are positioned on the central axis of the sedimentation tank body 1.
The pulley block device 44 is provided with two vertical steel columns which are arranged in parallel, a pair of pulleys are respectively arranged between the upper parts and the lower parts of the two steel columns, each pair of pulleys are connected through a pulley shaft, two ends of the pulley shaft are fixed on the steel columns, the rim of each pulley is arranged outwards, the included angle between the outer edge of each pulley and the rolling surface of each pulley is slightly larger than 90 degrees and is engaged with the channel steel of the large scraper slide rail at right angles, the pulley block device 44 is prevented from being separated from the track, and the horizontal state of the left large scraper and the right large scraper in the rotary mud scraping process is ensured.
The up-and-down motion driving mechanism is provided with a steel wire rope 45 for lifting the pulley block device 44, a breaking joint 46 for preventing the steel wire rope from twisting and a wire rope pulling and releasing device 47; the breaking joint 46 is provided with a bearing shell, a thrust bearing and a rotating shaft, the upper end of the lower steel wire rope is connected with the rotating shaft of the breaking joint, and the lower end of the lower steel wire rope is connected with the center of a pulley shaft on the pulley block device 44 of the large scraper mechanism 19; the lower end of the upper steel wire rope is connected with the breaking joint bearing shell, and the upper steel wire rope passes through the center of the auxiliary hollow shaft 38 and then is connected with the wire rope pulling and releasing device. The pull-off wire rope device 47 pulls up or down the large squeegee mechanism by pulling up or down the wire rope 45, and no pull-up or breakage of the wire rope occurs during this process.
Claims (8)
1. A water treatment sedimentation tank is characterized in that: the sedimentation tank is provided with a sedimentation tank body, and the interior of the sedimentation tank body is sequentially provided with a clear water zone, a sedimentation separation zone, a transition zone, a sludge zone and a water seepage zone from top to bottom; a water inlet and distribution device is arranged in the transition zone of the sedimentation tank, a water outlet device is arranged at the upper part of the clear water zone, a mechanical chamber is arranged below the middle part of the sludge zone of the sedimentation tank, a water seepage device is arranged between the mechanical chamber below the sludge zone and the inner wall of the tank body, and a sediment sludge cleaning device is also arranged in the sedimentation tank; the device comprises a sludge collecting chamber arranged at the upper part of a mechanical chamber, wherein the upper end of the sludge collecting chamber is opened, a sludge output device for conveying sludge to the outside of a sedimentation tank body is arranged in the sludge collecting chamber, a small scraping plate mechanism for scraping the sludge into the sludge collecting chamber is arranged at the bottom of a sludge area and right above the sludge collecting chamber, a large scraping plate mechanism for pushing the sludge to the central part of the sedimentation tank body is arranged above the sludge area, the large scraping plate mechanism and the small scraping plate mechanism are driven to rotate by the same rotary driving mechanism, and an up-down motion driving mechanism for driving the large scraping plate mechanism to move up and down is arranged at the upper part of the sedimentation tank body; the water inlet and distribution device comprises a diversion chamber arranged at the center of the sedimentation tank and a raw water inlet pipe connected with the top of the diversion chamber, wherein the diversion chamber is formed by sleeving two inner cylinders and outer cylinders which are coaxially arranged, a baffle plate which is turned over towards the outer cylinder is arranged at the lower part of the inner cylinder, an umbrella-shaped water outlet is formed at the bottom of the diversion chamber, and the position of the umbrella-shaped water outlet is arranged at the lower part of the sedimentation separation zone; the water seepage device comprises a sand filtering layer and a sand cushion layer which are sequentially arranged from top to bottom, a female branch pipe drainage device is pre-buried in the sand cushion layer, the female branch pipe drainage device comprises a female pipe and a plurality of branch pipes which are pre-buried in the sand cushion layer, the plurality of branch pipes are connected with the female pipe, water inlets are formed in each branch pipe, the water outlet end of the female pipe extends out of the sedimentation tank body, and a drain valve is arranged on the female pipe extending out of the sedimentation tank body.
2. The water treatment sedimentation tank of claim 1, wherein: the water outlet device comprises an annular floating water collecting tank, a water outlet hose, a water outlet fixed pipe and an annular floating water collecting tank lowest position limiting frame, wherein the annular floating water collecting tank is arranged at the upper part of a clear water area; the lowest position limit frame of the annular floating water collecting tank is arranged in the clear water area above the water outlet fixed pipe.
3. The water treatment sedimentation tank of claim 1, wherein: the rotary driving 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 penetrates through the sludge collection chamber from the center of the bottom of the sludge collection chamber, a large scraper slide rail is arranged between the main shaft and the auxiliary hollow shaft, a small scraper mechanism is fixed at the upper end of the main shaft, and a driving mechanism for driving the main shaft to rotate is arranged in the mechanical chamber; the small scraping plate mechanism comprises a connecting circular plate horizontally fixed at the upper end of the main shaft, a supporting plate with the root fixed at the outer edge of the connecting circular plate and a small scraping plate attached to the inner edge of the supporting plate, wherein the small scraping plate is formed by attaching a plurality of sections of small scraping plates which are connected end to end and vertically arranged on the inner edge of the supporting plate, the horizontal section of the small scraping plate is of an involute structure, any vertical surface on the inner surface of the small scraping plate passes through the sludge collection chamber, the included angle between any point on the inner surface of the small scraping plate and the plane determined by the axis of the main shaft and the inner surface of the scraping plate is larger than 90 degrees, the lower edge of the small scraping plate is positioned in the same horizontal plane, and the height of the small scraping plate is gradually reduced from inside to outside.
4. A water treatment sedimentation tank as claimed in claim 3, characterized in that: the large scraper mechanism is provided with a pulley block device and two large scrapers which are horizontally and symmetrically fixed on two sides of the bottom of the pulley block device;
The large scraping plate comprises a cross arm, a plurality of scraping blades which are vertically arranged are uniformly arranged on the lower surface of the cross arm along the length direction of the cross arm, and an included angle between the scraping blades and the cross arm at the front center side in the rotation direction is larger than 90 degrees;
The heights of the scraping blades are alternately and gradually reduced from the center between the two cross arms to the outside, the scraping blades on the left cross arm are arranged in odd numbers of 1,3, 5 and 7 … … X-1 from the center to the outside, the scraping blades on the right cross arm are arranged in even numbers of 2, 4, 6 and 8 … … X from the center to the outside, the number 1 scraping blade is at the innermost end, and the number X scraping blade is at the outermost end; the radius of the track circle of the front end point of the X-1 wiper blade is slightly larger than that of the track circle of the rear end point of the X wiper blade in the rotation process of the cross arm; the length of the left large scraper and the length of the right large scraper are equal, and the gap between the outer end and the inner wall of the sedimentation tank body is 8cm-12cm.
5. The water treatment sedimentation tank of claim 4, wherein: the large scraper slide rail is a track formed by two parallel channel steel with outwards-arranged notches, and the distance between the two tracks is slightly larger than the diameter of a pulley of the pulley block device; the two rails are vertically fixed above a connecting circular plate of the small scraper mechanism, the tops of the two rails are respectively fixed on two sides of the lower part of the auxiliary hollow shaft, and the axes of the main shaft and the auxiliary hollow shaft and the symmetrical central lines of the two rails are positioned on the central axis of the sedimentation tank.
6. The water treatment sedimentation tank of claim 5, wherein: the pulley block device be equipped with two vertical and parallel arrangement's steel column, be equipped with a pair of pulley respectively between the upper portion and the lower part of two steel columns, link to each other through the pulley shaft between every pair of pulley, pulley shaft both ends are fixed on the steel column, the rim of pulley sets up outwards, and pulley outer fringe and pulley rolling surface contained angle slightly are greater than 90 degrees and with big scraper blade slide rail channel-section steel right angle interlock.
7. The water treatment sedimentation tank of claim 6, wherein: the up-and-down motion driving mechanism is provided with a steel wire rope for lifting the pulley block device, a breaking joint for preventing the steel wire rope from twisting and a wire rope pulling and releasing device; the lower end of the lower steel wire rope is connected with the center of a pulley block device of the large scraper mechanism; the lower end of the upper steel wire rope is connected with the breaking joint bearing shell, and the upper steel wire rope passes through the center of the auxiliary hollow shaft and then is connected with the wire rope pulling and releasing device.
8. The water treatment sedimentation tank of claim 1, wherein: the sludge output device comprises one or two screw conveyors, and a first screw conveyor and a second screw conveyor matched with the first screw conveyor are arranged when the two screw conveyors are used as the sludge output device; the first screw conveyor is provided with a sludge inlet and a sludge outlet, the sludge inlet is arranged in the sludge collecting chamber, and the sludge outlet is arranged outside the sedimentation tank body; the lower end sludge inlet of the second screw conveyor is in butt joint 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.
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| CN201810092794.7A CN108159743B (en) | 2018-01-31 | 2018-01-31 | Water treatment sedimentation tank |
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| CN201810092794.7A CN108159743B (en) | 2018-01-31 | 2018-01-31 | Water treatment sedimentation tank |
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| CN108159743B true CN108159743B (en) | 2024-04-26 |
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| CN110124364A (en) * | 2019-04-22 | 2019-08-16 | 华电电力科学研究院有限公司 | A kind of round ground type coal water sedimentation pond of automatic row's coal slime and row's coal slime method |
| CN110787499A (en) * | 2019-11-11 | 2020-02-14 | 山东海普欧环保设备科技有限公司 | Sewage impurity fishing machine |
| CN111375230A (en) * | 2020-05-14 | 2020-07-07 | 周全红 | Washing concentration environment-friendly separation equipment |
| CN112028301B (en) * | 2020-07-30 | 2022-09-13 | 深圳市创飞格环保实业有限公司 | Graded circulation treatment device based on sewage treatment and treatment method thereof |
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| KR200175648Y1 (en) * | 1999-10-29 | 2000-03-15 | 주식회사삼안건설기술공사 | Sand filter |
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| CN201932990U (en) * | 2011-01-30 | 2011-08-17 | 福建建瓯成茂农产品有限公司 | Sewage treatment device of bamboo shoot processing factory |
| CN205461179U (en) * | 2016-02-02 | 2016-08-17 | 何新华 | Sedimentation basin |
| CN208065849U (en) * | 2018-01-31 | 2018-11-09 | 何新华 | A kind of sedimentation pond for water treatment |
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|---|---|---|---|---|
| KR200175648Y1 (en) * | 1999-10-29 | 2000-03-15 | 주식회사삼안건설기술공사 | Sand filter |
| KR20010096457A (en) * | 2000-08-04 | 2001-11-07 | 김학광 | System of Movable Type for Preventing Sludge from Scattering in the Sludge Discharging Apparatus |
| CN201932990U (en) * | 2011-01-30 | 2011-08-17 | 福建建瓯成茂农产品有限公司 | Sewage treatment device of bamboo shoot processing factory |
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