CN112691444A - Vertical filtration overflow water intaking type desilting basin in turn - Google Patents
Vertical filtration overflow water intaking type desilting basin in turn Download PDFInfo
- Publication number
- CN112691444A CN112691444A CN202011504826.3A CN202011504826A CN112691444A CN 112691444 A CN112691444 A CN 112691444A CN 202011504826 A CN202011504826 A CN 202011504826A CN 112691444 A CN112691444 A CN 112691444A
- Authority
- CN
- China
- Prior art keywords
- water
- section
- tank
- primary
- overflow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/04—Combinations of filters with settling tanks
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention belongs to the technical field of hydraulic building design of hydraulic and hydroelectric engineering, and particularly relates to an alternative vertical filtering overflow water taking type desilting basin. The first diffusion section, the first-stage desilting tank, the overflow section, the second diffusion section and the second-stage desilting tank are sequentially arranged according to the water flow direction; the first sluice and the water channel are obliquely crossed at an angle of 30-60 degrees, and water is obliquely guided; the water in the primary desilting pool flows through the water-emitting holes on the section of the rectifying plate and enters the primary filter tank, and after being filtered by the section of the filtering layer, the water respectively flows into the water-collecting port from the pair of overflow water channels and overflows from the flow-blocking wall at the water outlet end of the primary filter tank and enters the water-collecting port; the water in the secondary desilting basin flows through the water outflow holes on the two-section rectifying plate and enters a secondary filter tank, and after being filtered by the second inverted filter layer, the water respectively overflows from the flow-resisting wall at the water outlet end of the secondary filter tank and enters a water outlet, and then sinks sand downwards and takes water upwards; above, the mode of slant diversion, upwards water intaking effectively filters large granule silt and gets into the pond.
Description
Technical Field
The invention belongs to the technical field of hydraulic building design of hydraulic and hydroelectric engineering, is suitable for water taking engineering on channels with high silt content, and particularly relates to an overflow water taking type desilting basin with alternate vertical filtration.
Background
The desilting basin is one of the important components of the diversion project, and the sand content of the desilting basin is the most important factor for determining whether the diversion project can normally run.
The diversion engineering sand basin usually adopts single-chamber or multi-chamber arrangement, and the pond water flow is through diffusion after, and the section that overflows increases, and the velocity of flow diminishes, has reduced water conservancy sand-carrying power, and the silt that is greater than design settlement particle size in the rivers alright obtain subsiding, has reduced the play pond water flow sand content, but the pond silt that goes into subsides in the bottom of the pool, has brought the interior siltation of pond railway carriage or compartment and has difficult to clear up, influences the normal operating of sand basin. The traditional desilting pond makes silt subside through reducing the water flow velocity of holding with the sand, and it is better to the silt settlement effect of great granule, to the great rivers of silt content, if want further improvement desilting efficiency, just must enlarge the desilting pond scale, cause the engineering investment great. The traditional desilting basin is generally suitable for the sediment content in the basin less than 80kg/m3When the silt content in the pond is more than 100kg/m3In the above process, the sand content of the effluent exceeds the use requirement, and the sediment at the bottom of the tank is seriously deposited, so that the sand settling efficiency is further reduced, and the operation of the sand settling tank needs to be stopped.
For diversion works on channels with high silt content, the silt content in the outlet tank can not meet the water supply requirement only by reducing the flow velocity, and after a large amount of silt is settled and deposited, the silt settling effect of the silt settling tank is suddenly reduced, so that the normal operation of the whole water taking work is seriously influenced.
Disclosure of Invention
In order to solve the problems, the invention provides the alternative vertical filtering overflow water taking type sand basin, the continuous sand flushing vertical filtering overflow water taking type sand basin effectively reduces the sand content of the outlet basin, flushes the sediment at the bottom of the basin in real time, improves the operation efficiency of the sand basin, and is convenient to operate and manage by controlling the measures of large-particle-size sediment entering the basin, continuously flushing the multistage bottom holes in real time, vertically filtering the sediment, fetching water through overflow on the surface layer and the like.
The specific technical scheme is as follows:
an overflow water taking type sand basin with alternate vertical filtration comprises a first diffusion section 1, a first-stage sand basin 2, an overflow section 3, a second diffusion section 4 and a second-stage sand basin 5 which are sequentially arranged according to the water flow direction, wherein the cross sections of the first diffusion section 1 and the second diffusion section 4 are horn-shaped, and the narrow mouth of each horn corresponds to a water inlet end;
one end of the first diffusion section 1, which is far away from the primary desilting basin 2, is communicated with the water diversion channel 7 through a first sluice 61;
the primary sand basin 2 sequentially comprises a first water inlet section 21 and a primary filtering section 22 according to the water flow direction, the upper part of the primary filtering section 22 is a horizontally arranged primary filtering groove 221, the lower part of the primary filtering section 22 is a primary water flow channel, the primary water flow channel is communicated with the primary filtering groove 221, a first inverse filtering layer 222 is laid at the bottom of the primary filtering groove 221, and the outlet of the primary water flow channel is communicated with the outside through a sand washing culvert 81;
the secondary sand basin 5 sequentially comprises a second water inlet section 51 and a secondary filtering section 52 according to the water flow direction, the upper part of the secondary filtering section 52 is a secondary filtering tank 521 horizontally arranged, the lower part of the secondary filtering section 52 is a secondary water flow channel, the secondary water flow channel is communicated with the secondary filtering tank 521, a second inverted filter layer 522 is laid at the bottom of the secondary filtering tank 521, and the outlet of the secondary water flow channel is communicated with the outside through a secondary sand washing culvert 82;
the water flow of the water channel 7 sequentially flows through the first diffusion section 1, the first water inlet section 21, the primary filtering section 22, the overflow section 3, the second diffusion section 4, the second water inlet section 51 and the secondary filtering section 52; in the first-stage filtering section 22, water flows into the first-stage filtering tank 221 through the first-stage water flow channel, and overflows into the overflow section 3 after being filtered; in the secondary filtering section 52, the water flows into the secondary filtering tank 521 through the secondary water flow channel, and overflows into the water outlet 523 after being filtered, and water can be taken through the water taking steel pipe 524.
The periphery of the first-stage filter tank 221 is provided with flow blocking walls, the bottom of the first-stage filter tank is provided with a section of rectifying plate 223 to enclose the city, the height of the flow blocking walls on the two sides of the first-stage filter tank 221 is lower than that of the wall of the first-stage desilting basin 2 to form a pair of overflow water channels 224,
the height of the flow-resisting wall at the water inlet end of the primary filter tank 221 is the same as that of the tank wall of the primary desilting tank 2, the height of the flow-resisting wall at the water outlet end of the primary filter tank 221 is lower than that of the tank wall of the primary desilting tank 2 to form a water collecting port 225, and the water collecting port 225 is communicated with the overflow section 3;
the first section of the rectifying plate 223 is uniformly provided with water outlet holes corresponding to the first-stage water flow channel, so that the first-stage water flow channel is communicated with the first-stage filter tank 221;
the primary water flow channel is two parallel first tank boxes 23.
A first partition wall 24 is arranged in the extending direction of the chamber partition wall between the two first tank boxes 23, and the first partition wall 24 sequentially extends into the first water inlet section 21 and the first diffusion section 1, so that the water inlet of the primary desilting basin 2 is uniformly divided into two water flows;
the middle of the bottom of each first tank box 23 is provided with a sand washing bottom hole 231, the sand washing bottom holes 231 are arranged along the extending direction of the first tank box 23, and the water outlet ends of the two sand washing bottom holes 231 are communicated and are respectively communicated with the section of sand washing culvert 81 through a second water gate 62.
The two-stage filtering tank 521 is surrounded by tank walls with two sides of the two-stage desilting tank 5, flow blocking walls at two ends and two sections of rectifying plates 525 at the bottom, and a separating flow blocking wall 526 is arranged in the middle of the two-stage filtering tank 521 to separate the two-stage filtering tank 521 into two parallel square tanks;
the height of the flow-resisting wall of the water inlet end of each square groove is the same as that of the wall of the secondary sand sedimentation tank 5, the height of the flow-resisting wall of the water outlet end of each square groove is lower than that of the wall of the secondary sand sedimentation tank 5 to form a water outlet 523, water can be taken from the water outlet 523 through a water taking steel pipe 524, and the water inlet end of each water taking steel pipe 524 is provided with a valve;
the two-section rectifying plate 525 is uniformly provided with water-emitting holes corresponding to the secondary water flow channel, so that the secondary water flow channel is communicated with the secondary filtering tank 521;
the secondary water flow channel is composed of 6 parallel second tank boxes 53, and the water outlet end of each second tank box 53 is communicated with the second segment sand washing culvert 82 through a third water gate 63.
every the bottom of second pond case 53 all is equipped with slope barricade 531 and triangle-shaped barricade 532 for form two towards sand groove along the longitudinal extension direction of second pond case 53 bottom, the vertical cross-section of every towards sand groove is for falling trapezoidal.
The first inverted filter layer 222 and the second inverted filter layer 522 are identical in structure, and are sequentially a 100-mesh steel wire mesh and an inverted filter layer with the thickness of 1m from bottom to top, and an inverted filter material of the inverted filter layer is graded gravel with the grain size of 3-10 mm.
The middle part of the second diffusion section 4 is enclosed into a non-water flow area with a rhombic cross section by a flow resisting wall, a rhombic symmetrical shaft is consistent with the water flow direction, a gap is left between the flow resisting wall corresponding to the two ends of the other symmetrical shaft and the corresponding side wall of the second diffusion section 4 to form a pair of water flow ports, and a fourth water gate 64 is arranged on each water flow port.
The first water gate 61 and the water guide channel 7 are obliquely crossed at an angle of 30-60 degrees, and the gate bottom sill of the first water gate 61 is 0.2m higher than the channel bottom.
The diffusion angle of the first diffusion section 1 is 20 degrees, and the slope ratio of the bottom of the first diffusion section 1 is 1: 6; the diffusion angle of the second diffusion section 4 is 25 degrees, and the slope ratio of the bottom of the second diffusion section 4 is 1: 10; the slope of the bottom of the secondary desilting pool 5 is less than or equal to 2 degrees.
The overflow section 3 is a curved surface type overflow weir, the weir top of the overflow weir adopts a WES section, and the clear width of the weir surface of the overflow weir is 6.0 m.
The beneficial technical effects of the invention are embodied in the following aspects:
the invention relates to an overflow water taking type sand basin with alternate vertical filtration, which is characterized in that a first diffusion section, a first-stage sand basin, an overflow section, a second diffusion section and a second-stage sand basin are sequentially arranged according to the water flow direction; the first sluice and the water channel are obliquely crossed at an angle of 30-60 degrees, and water is obliquely guided; the water in the primary desilting pool flows through the water-emitting holes on the section of the rectifying plate and enters the primary filter tank, and after being filtered by the section of the filtering layer, the water respectively flows into the water-collecting port from the pair of overflow water channels and overflows from the flow-blocking wall at the water outlet end of the primary filter tank and enters the water-collecting port; the water in the secondary desilting basin flows through the water outflow holes on the two-section rectifying plate and enters a secondary filter tank, and after being filtered by the second inverted filter layer, the water respectively overflows from the flow-resisting wall at the water outlet end of the secondary filter tank and enters a water outlet, and then sinks sand downwards and takes water upwards; above, the mode of slant diversion, upwards water intaking effectively filters large granule silt and gets into the pond.
The diffusion angle of the first diffusion section is 20 degrees, the slope ratio of the bottom slope is less than 1:5, the longitudinal slope of the first grit chamber is not less than 1%, the water outlet ends of the two sand washing bottom holes of the first grit chamber are communicated and are respectively communicated with the section of sand washing culvert through the second water gate, so that the sand washing at the bottom of the first grit chamber can be continuously carried out in real time by controlling the second water gate.
The diffusion angle of the second diffusion section is 25 degrees, the slope ratio of the bottom slope is not steeper than 1:10, the longitudinal slope of the second grit chamber is not less than 1%, the water outlet end of each second chamber of the second grit chamber is communicated with the two sections of sand washing culverts through third water gates respectively, and therefore the third water gates can be controlled to continuously wash the settled sand at the bottom of the second grit chamber in real time; the real-time continuous sand flushing avoids fine sand siltation, ensures the effective capacity of the desilting tank and improves the desilting efficiency.
The primary sand basin and the secondary sand basin are arranged in series, two square grooves of the secondary sand basin are arranged in parallel, and three second basin boxes are arranged below each square groove, so that large-grain-size silt and small-grain-size silt can be subjected to fractional precipitation, and the silt precipitation rate is increased step by step.
Therefore, the alternate vertical filtering overflow water taking type desilting basin is used in the water diversion engineering of the channel with high silt content to realize the oblique water diversion, upward water taking, real-time continuous sand flushing and graded precipitation, and when the silt content in the basin is 120kg/m3The sediment sedimentation amount is 90.8 percent, and the sediment content in the effluent tank is less than12kg/m3And the grain size of the silt discharged from the pool is less than 0.05 mm.
Drawings
FIG. 1 is a schematic structural diagram of an alternate vertical filtration overflow water-taking type desilting basin of the invention.
Fig. 2 is a sectional top view a-a of fig. 1.
Fig. 3 is an enlarged view of the water inlet end of fig. 1.
Fig. 4 is an enlarged view of the water outlet end of fig. 1.
Fig. 5 is an enlarged view at I of fig. 2.
Fig. 6 is an enlarged view of fig. 2 at point ii.
Fig. 7 is a sectional view B-B.
Fig. 8 is a cross-sectional view C-C.
Sequence numbers in the upper figure: 1 a first diffusion section, 2 a first sand basin, 21 a first water inlet section, 22 a first filtering section, 221 a first filtering tank, 222 a first back filtering layer, 223 a section of rectifying plate, 224 a pair of overflow water channels, 225 a water collecting port, 23 a first tank box, 231 a sand flushing bottom hole, 24 a first partition wall, 3 an overflow section, 4 a second diffusion section, 5 a second sand basin, 61 a first sluice, 62 a second sluice, 64 a third sluice, 7 a water guide channel, 81 a sand flushing culvert, 82 a second sand flushing culvert, 51 a second water inlet section, 52 a second filtering section, 521 a second filtering tank, 522 a second back filtering layer, 523 a water outlet, 524 a water taking steel pipe, 525 a second rectifying plate section, 526 separating flow blocking walls, 53 a second tank, 531 an inclined retaining wall, 532 a triangular retaining wall and 54 a second partition wall.
Detailed Description
The invention will be further described by way of example with reference to the accompanying drawings.
Examples
The utility model provides an overflow water intaking type desilting basin is vertically filtered in turn, sees figure 1 ~ figure 2, includes first diffuser 1, one-level desilting basin 2, overflow section 3, second diffuser 4 and the desilting basin 5 of second grade that sets gradually according to the rivers direction, and the cross section of first diffuser 1 and second diffuser 4 is loudspeaker form, and the narrow mouth of loudspeaker corresponds the end of intaking.
The middle part of the second diffusion section 4 is enclosed into a non-water flow area with a rhombic cross section by a flow resisting wall, a rhombic symmetrical shaft is consistent with the water flow direction, a gap is left between the flow resisting wall corresponding to the two ends of the other symmetrical shaft and the corresponding side wall of the second diffusion section 4 to form a pair of water flow ports, and a fourth water gate 64 is arranged on each water flow port.
The first water gate 61 and the water guide channel 7 are obliquely crossed at an angle of 30-60 degrees, and the gate bottom sill of the first water gate 61 is 0.2m higher than the channel bottom. Used for blocking the silt with larger grain diameter from entering the primary desilting tank 2.
The diffusion angle of the first diffusion section 1 is 20 degrees, and the slope ratio of the bottom of the first diffusion section 1 is 1: 6; the diffusion angle of the second diffusion section 4 is 25 degrees, and the slope ratio of the bottom of the second diffusion section 4 is 1: 10; the slope of the bottom of the secondary desilting pool 5 is less than or equal to 2 degrees.
The overflow section 3 is a curved surface type overflow weir, the weir top of the overflow weir adopts a WES section, and the clear width of the weir surface of the overflow weir is 6.0 m.
One end of the first diffusion section 1, which is far away from the primary desilting basin 2, is communicated with the water diversion channel 7 through a first sluice 61;
the primary sand basin 2 sequentially comprises a first water inlet section 21 and a primary filtering section 22 according to the water flow direction, the upper part of the primary filtering section 22 is a horizontally arranged primary filtering groove 221, the lower part of the primary filtering section 22 is a primary water flow channel, the primary water flow channel is communicated with the primary filtering groove 221, a first inverse filtering layer 222 is laid at the bottom of the primary filtering groove 221, and the outlet of the primary water flow channel is communicated with the outside through a sand washing culvert 81;
the secondary sand basin 5 sequentially comprises a second water inlet section 51 and a secondary filtering section 52 according to the water flow direction, the upper part of the secondary filtering section 52 is a secondary filtering tank 521 horizontally arranged, the lower part of the secondary filtering section 52 is a secondary water flow channel, the secondary water flow channel is communicated with the secondary filtering tank 521, a second inverted filter layer 522 is laid at the bottom of the secondary filtering tank 521, and the outlet of the secondary water flow channel is communicated with the outside through a secondary sand washing culvert 82;
the water flow of the water channel 7 sequentially flows through the first diffusion section 1, the first water inlet section 21, the primary filtering section 22, the overflow section 3, the second diffusion section 4, the second water inlet section 51 and the secondary filtering section 52; in the first-stage filtering section 22, water flows into the first-stage filtering tank 221 through the first-stage water flow channel, and overflows into the overflow section 3 after being filtered; in the secondary filtering section 52, the water flows into the secondary filtering tank 521 through the secondary water flow channel, and overflows into the water outlet 523 after being filtered, and water can be taken through the water taking steel pipe 524.
Referring to fig. 5 and 7, the primary filter tank 221 is surrounded by flow-resisting walls at the periphery and a rectifying plate 223 at the bottom, the flow-resisting walls at two sides of the primary filter tank 221 are lower than the wall of the primary desilting basin 2 to form a pair of overflow water channels 224,
the height of the flow-resisting wall at the water inlet end of the primary filter tank 221 is the same as that of the tank wall of the primary desilting tank 2, the height of the flow-resisting wall at the water outlet end of the primary filter tank 221 is lower than that of the tank wall of the primary desilting tank 2 to form a water collecting port 225, and the water collecting port 225 is communicated with the overflow section 3; the first section of the rectifying plate 223 is uniformly provided with water outlet holes corresponding to the first-stage water flow channel, so that the first-stage water flow channel is communicated with the first-stage filter tank 221; the primary water flow channel is two parallel first tank boxes 23.
A first partition wall 24 is arranged in the extending direction of the chamber partition wall between the two first tank boxes 23, and the first partition wall 24 sequentially extends into the first water inlet section 21 and the first diffusion section 1, so that the water inlet of the primary desilting basin 2 is uniformly divided into two water flows;
referring to fig. 3, a sand washing bottom hole 231 is formed in the middle of the bottom of each first tank 23, the sand washing bottom holes 231 are arranged along the extending direction of the first tank 23, and the water outlet ends of the two sand washing bottom holes 231 are communicated and respectively communicated with the section of sand washing culvert 81 through a second water gate 62.
Referring to fig. 6 and 8, the secondary filtering tank 521 is surrounded by tank walls with two sides of the secondary desilting tank 5, flow blocking walls with two ends, and two sections of rectification plates 525 at the bottom, and a separating flow blocking wall 526 is arranged in the middle of the secondary filtering tank 521 to separate the secondary filtering tank 521 into two parallel square tanks;
the height of the flow-resisting wall of the water inlet end of each square groove is the same as that of the wall of the secondary sand sedimentation tank 5, the height of the flow-resisting wall of the water outlet end of each square groove is lower than that of the wall of the secondary sand sedimentation tank 5 to form a water outlet 523, water can be taken from the water outlet 523 through a water taking steel pipe 524, and the water inlet end of each water taking steel pipe 524 is provided with a valve;
the two-section rectifying plate 525 is uniformly provided with water-emitting holes corresponding to the secondary water flow channel, so that the secondary water flow channel is communicated with the secondary filtering tank 521;
referring to fig. 4, the secondary water flow channel is formed by 6 parallel second tank boxes 53, and the water outlet end of each second tank box 53 is communicated with the second segment sand washing culvert 82 through a third sluice 63.
every the bottom of second pond case 53 all is equipped with slope barricade 531 and triangle-shaped barricade 532 for form two towards sand groove along the longitudinal extension direction of second pond case 53 bottom, the vertical cross-section of every towards sand groove is for falling trapezoidal.
The first inverted filter layer 222 and the second inverted filter layer 522 are identical in structure, and are sequentially a 100-mesh steel wire mesh and an inverted filter layer with the thickness of 1m from bottom to top, and an inverted filter material of the inverted filter layer is graded gravel with the grain size of 3-10 mm.
And (3) process control operation regulation during sand deposition: the general requirements of engineering control operation are reasonable scheduling, real-time sand washing and continuous water supply;
specifically, the first sluice 61 can prevent the silt with larger particle size in the aqueduct 7 from entering the sand settling system, the sand-containing water flow enters the primary sand settling tank 2, the water flow enters the primary filter tank 221 through the water outflow hole on the first rectifying plate 223, and flows into the water collection port 225 from the pair of overflow water channels 224 after being filtered by the first anti-filtering layer 222, and the flow blocking wall at the water outlet end of the primary filter tank 221 overflows and enters the water collection port 225, meanwhile, more silt is precipitated and enters the sand washing bottom hole 231, and the second sluice 62 can be controlled to continuously wash the sand in real time. When the silt content in the pond is 120kg/m3The sediment sedimentation amount is 90.8 percent, and the sediment content of the effluent tank is less than 12kg/m3And the grain size of the silt discharged from the pool is less than 0.05 mm.
Wherein the adjustments made at runtime are: the diversion flow rate from the diversion canal 7 is increased timely (not less than 1.0 m) according to the change of silt content in the pond3/s）The water quantity requirement in the sand washing period is met; meanwhile, in order to meet the requirement of quickly filling the secondary desilting basin 5, the water outlet flow of the water collecting port 225 of the primary desilting basin 2 is not less than 0.5m during water filling3S; when the water filling of the second-stage desilting tank 5 is finished, the fourth water gate 64 is closed to realize immediate cutoff, when the clear water in the second-stage desilting tank 5 is emptied, the fourth water gate 64 timely adjusts the water outlet of the first-stage desilting tank 2, and the sediment at the bottom of the inverted trapezoidal box body of the second tank 53 is washed by a larger water amount.
The invention thus achieves several aspects:
(1) according to the alternate vertical filtering overflow water taking type sand basin, water in the primary sand basin 2 flows through the water emitting holes on the rectifying plate 223 to enter the primary filtering tank 221, and is filtered by the filtering layer to flow into the water collecting port 225 from the pair of overflow water channels 224 and flow into the water collecting port 225 through the flow resisting wall at the water outlet end of the primary filtering tank 221 in an overflowing manner;
the water in the secondary desilting basin 5 flows through the water-bleeding holes on the second-stage rectifying plate 525 and enters the secondary filtering tank 521, and after being filtered by the second inverted filter 522, the water respectively overflows from the flow-blocking wall at the water outlet end of the secondary filtering tank 521 and enters the water outlet 523.
The overflow water taking mode of downward sand settling and upward water taking effectively increases the settling rate of fine-particle sediment.
(2) The diffusion angle of the first diffusion section is about 20 degrees, the slope ratio of the bottom slope is less than 1:5, the longitudinal slope of the first grit chamber 2 is not less than 1%, the water outlet ends of the two sand washing bottom holes 231 of the first grit chamber 2 are communicated and are respectively communicated with the section of sand washing culvert 81 through the second water gate 62, so that the sand washing at the bottom of the first grit chamber 2 can be continuously carried out in real time by controlling the second water gate 62.
The divergence angle of the second diffusion section is about 25 degrees, and the bottom slope ratio is not steeper than 1:10, the longitudinal slope of the second grit chamber 5 is not less than 1%, the water outlet end of each second chamber 53 of the second grit chamber 5 is communicated with the two sections of sand washing culverts 82 through the third water gates 63, so that the sand sediment at the bottom of the second grit chamber 5 can be continuously washed in real time by controlling the third water gates 63.
The real-time continuous sand washing can avoid fine sand siltation, ensure the effective capacity of the sand basin and improve the sand settling efficiency.
(3) The second-stage filtering tank 521 is divided into two parallel square tanks by the separating group flow force 526, the lower part of each square tank corresponds to the three second tank boxes 53, two square tanks can be alternately operated by controlling the two fourth water gates 64 to filter settled sand, the two square tanks can be alternately operated every 6 hours, and the filter material in the square tanks which are not operated at the moment can be cleaned or replaced. The filtering material is cleaned or replaced regularly, and continuous water supply can be effectively ensured.
(4) Water is taken from the water outlet 523 through the water taking steel pipes 524, and the water inlet end of each water taking steel pipe 524 is provided with a valve, so that the water at the water outlet 523 is uniformly and safely conveyed.
Claims (10)
1. The utility model provides an in turn vertical filtration overflow water intaking type desilting basin which characterized in that:
the device comprises a first diffusion section (1), a primary sand settling tank (2), an overflow section (3), a second diffusion section (4) and a secondary sand settling tank (5) which are sequentially arranged according to the water flow direction, wherein the cross sections of the first diffusion section (1) and the second diffusion section (4) are horn-shaped, and the narrow opening of each horn corresponds to a water inlet end;
one end of the first diffusion section (1), which is far away from the primary desilting basin (2), is communicated with the water channel (7) through a first sluice (61);
the primary sand basin (2) sequentially comprises a first water inlet section (21) and a primary filtering section (22) according to the water flow direction, the upper part of the primary filtering section (22) is a horizontally arranged primary filtering groove (221), the lower part of the primary filtering section (22) is a primary water flow channel, the primary water flow channel is communicated with the primary filtering groove (221), a first inverse filtering layer (222) is laid at the bottom of the primary filtering groove (221), and the outlet of the primary water flow channel is communicated with the outside through a sand washing culvert (81);
the secondary sand basin (5) sequentially comprises a second water inlet section (51) and a secondary filtering section (52) according to the water flow direction, the upper part of the secondary filtering section (52) is a secondary filtering tank (521) which is horizontally arranged, the lower part of the secondary filtering section (52) is a secondary water flow channel, the secondary water flow channel is communicated with the secondary filtering tank (521), a second inverted filter layer (522) is laid at the bottom of the secondary filtering tank (521), and the outlet of the secondary water flow channel is communicated with the outside through a two-section sand washing culvert (82);
when the water inlet channel works, water flow of the water inlet channel (7) sequentially flows through the first diffusion section (1), the first water inlet section (21), the primary filtering section (22), the overflow section (3), the second diffusion section (4), the second water inlet section (51) and the secondary filtering section (52); wherein in the primary filtering section (22), water flows into the primary filtering tank (221) through the primary water flow channel, and overflows into the overflow section (3) after being filtered; in the secondary filtering section (52), water flows into the secondary filtering tank (521) through the secondary water flow channel, overflows into the water outlet (523) after being filtered, and can be taken through the water taking steel pipe (524).
2. The alternate vertical filtration overflow water intake type desilting basin of claim 1, characterized in that: the periphery of the first-stage filter tank (221) is a closed city with flow-resisting walls and a section of rectifying plate (223) at the bottom, the flow-resisting walls on the two sides of the first-stage filter tank (221) are lower than the height of the wall of the first-stage desilting basin (2) to form a pair of overflow water channels (224),
the height of the flow-resisting wall at the water inlet end of the primary filter tank (221) is the same as that of the tank wall of the primary desilting tank (2), the height of the flow-resisting wall at the water outlet end of the primary filter tank (221) is lower than that of the tank wall of the primary desilting tank (2) to form a water collecting port (225), and the water collecting port (225) is communicated with the overflow section (3);
the first section of the rectifying plate (223) is uniformly provided with water emitting holes corresponding to the first-stage water flow channel, so that the first-stage water flow channel is communicated with the first-stage filter tank (221);
the primary water flow channel is composed of two parallel first tank boxes (23).
3. The alternate vertical filtration overflow water intake type desilting basin of claim 2, characterized in that: a first partition wall (24) is arranged in the extending direction of the pool chamber partition wall between the two first pool boxes (23), the first partition wall (24) sequentially extends into the first water inlet section (21) and the first diffusion section (1), and the water inlet of the primary desilting pool (2) is uniformly divided into two water flows;
the middle of the bottom of each first tank box (23) is provided with a sand washing bottom hole (231), the sand washing bottom holes (231) are arranged along the extending direction of the first tank box (23), the water outlet ends of the two sand washing bottom holes (231) are communicated, and the two sand washing bottom holes are communicated with the section of sand washing culvert (81) through a second water gate (62) respectively.
4. The alternate vertical filtration overflow water intake type desilting basin of claim 1, characterized in that: the two-stage filter tank (521) is surrounded by tank walls with two sides of the two-stage desilting tank (5), flow blocking walls at two ends and two sections of rectifying plates (525) at the bottom, and a separating flow blocking wall (526) is arranged in the middle of the two-stage filter tank (521) to separate the two-stage filter tank (521) into two parallel square tanks;
the height of the flow-resisting wall of the water inlet end of each square groove is the same as that of the wall of the secondary sand settling tank (5), the height of the flow-resisting wall of the water outlet end of each square groove is lower than that of the wall of the secondary sand settling tank (5) to form a water outlet (523), water can be taken from the water outlet (523) through a water taking steel pipe (524), and a valve is arranged at the water inlet end of each water taking steel pipe (524);
the two-section rectifying plate (525) is uniformly provided with water emitting holes corresponding to the secondary water flow channel, so that the secondary water flow channel is communicated with the secondary filtering tank (521);
the secondary water flow channel is composed of 6 parallel second tank boxes (53), the water outlet end of each second tank box (53) is communicated, and the secondary water flow channel is communicated with the two sections of sand washing culverts (82) through third water gates (63).
5. The alternate vertical filtration overflow water intake type desilting basin of claim 4, characterized in that: second partition walls (54) are uniformly distributed in the extending direction of the pool chamber partition walls between the adjacent second pool boxes (53), each second partition wall (54) extends to the second water inlet section (51), the water inlet of the secondary sand basin (5) is uniformly divided into 6 streams, and each stream flows into the corresponding second pool box (53);
every the bottom of second pond case (53) all is equipped with slope barricade (531) and triangle-shaped barricade (532) for form two towards sand groove along the longitudinal extension direction of second pond case (53) bottom, the vertical cross-section of every towards sand groove is for falling trapezoidal.
6. The alternate vertical filtration overflow water intake type desilting basin of claim 1, characterized in that: the first inverted filter layer (222) and the second inverted filter layer (522) are identical in structure, and are sequentially a 100-mesh steel wire mesh and an inverted filter layer with the thickness of 1m from bottom to top, and an inverted filter material of the inverted filter layer is graded gravel with the grain size of 3-10 mm.
7. The alternate vertical filtration overflow water intake type desilting basin of claim 1, characterized in that: the middle part of the second diffusion section (4) is enclosed into a non-water flow area with a rhombic cross section through a flow blocking wall, a rhombic symmetrical shaft is consistent with the water flow direction, a gap is reserved between the flow blocking wall corresponding to the two ends of the other symmetrical shaft and the side wall of the corresponding second diffusion section (4) to form a pair of water flow ports, and a fourth water gate (64) is arranged on each water flow port.
8. The alternate vertical filtration overflow water intake type desilting basin of claim 1, characterized in that: the first water gate (61) and the water guide channel (7) are obliquely crossed at an angle of 30-60 degrees, and the gate bottom sill of the first water gate (61) is 0.2m higher than the channel bottom.
9. The alternate vertical filtration overflow water intake type desilting basin of claim 1, characterized in that: the diffusion angle of the first diffusion section (1) is 20 degrees, and the slope ratio of the bottom of the first diffusion section (1) is 1: 6; the diffusion angle of the second diffusion section (4) is 25 degrees, and the slope ratio of the bottom of the second diffusion section (4) is 1: 10; the slope of the bottom of the secondary desilting pool (5) is less than or equal to 2 degrees.
10. The alternate vertical filtration overflow water intake type desilting basin of claim 1, characterized in that: the overflow section (3) is a curved surface type overflow weir, the weir top of the overflow weir adopts a WES section, and the net width of the weir surface of the overflow weir is 6.0 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011504826.3A CN112691444A (en) | 2020-12-18 | 2020-12-18 | Vertical filtration overflow water intaking type desilting basin in turn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011504826.3A CN112691444A (en) | 2020-12-18 | 2020-12-18 | Vertical filtration overflow water intaking type desilting basin in turn |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112691444A true CN112691444A (en) | 2021-04-23 |
Family
ID=75507388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011504826.3A Pending CN112691444A (en) | 2020-12-18 | 2020-12-18 | Vertical filtration overflow water intaking type desilting basin in turn |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112691444A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182698A (en) * | 2021-11-18 | 2022-03-15 | 上海勘测设计研究院有限公司 | Continuous sand flushing type desilting basin structure and overhauling operation method thereof |
-
2020
- 2020-12-18 CN CN202011504826.3A patent/CN112691444A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182698A (en) * | 2021-11-18 | 2022-03-15 | 上海勘测设计研究院有限公司 | Continuous sand flushing type desilting basin structure and overhauling operation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210645245U (en) | Flushable sand settling system | |
| CN110478977B (en) | Spiral flow is from arranging husky formula desilting filtering ponds | |
| CN211419733U (en) | Can realize aeration and back flush constructed wetland | |
| CN102381805B (en) | Method and device for comprehensively purifying runoff rainwater | |
| CN112047535A (en) | Quality-classified and partition CSO regulation and storage purification system and rainwater purification method | |
| CN110478978B (en) | Circular gravity sand-settling filter tank capable of automatically discharging sand | |
| CN112691444A (en) | Vertical filtration overflow water intaking type desilting basin in turn | |
| CN206604231U (en) | A kind of grating type desilting device | |
| CN219489718U (en) | Separated gravel filter bed structure with dam water diversion | |
| CN214344961U (en) | Vertical filtration overflow water intaking type desilting basin in turn | |
| CN205637032U (en) | Burst regulation discharge system that dams | |
| CN101967842B (en) | High-efficiency tilted plate sand-removal and water-intake device | |
| CN214696500U (en) | Runoff control device | |
| CN214401641U (en) | Active-passive debris flow water-stone separation-energy dissipation disaster reduction device | |
| CN211644951U (en) | Two-way preposition library | |
| CN209475773U (en) | A kind of fish gill formula dynamic continuously filters setting pot | |
| CN100384749C (en) | Self-adjusting dry-wet alternated parallel-operation water tank system | |
| CN115110470A (en) | Flood-running river channel storage device | |
| CN209161740U (en) | Water body processing apparatus | |
| CN207498137U (en) | A kind of rural area purifying trench sewage system | |
| CN214115140U (en) | Quality-classified partition CSO regulation and storage purification system | |
| CN212770033U (en) | Multistage desilting basin and comprehensive ecological development system | |
| CN112604327B (en) | Desilting basin | |
| CN221254241U (en) | Anti-blocking up-flow constructed wetland | |
| CN111115963A (en) | Sewage treatment plant based on river weir |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |