CN216303367U - Grid folded plate combined pool - Google Patents
Grid folded plate combined pool Download PDFInfo
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- CN216303367U CN216303367U CN202122660119.XU CN202122660119U CN216303367U CN 216303367 U CN216303367 U CN 216303367U CN 202122660119 U CN202122660119 U CN 202122660119U CN 216303367 U CN216303367 U CN 216303367U
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Abstract
The utility model relates to a grid folded plate combined pool, which comprises a mixing pool, a grid flocculation pool, a folded plate flocculation pool and an inclined tube sedimentation pool which are arranged in sequence; a water inlet pipe is arranged at the bottom of the mixing tank; the grid flocculation tank comprises a plurality of vertical shafts which are connected in sequence, and the water inlet end of the first vertical shaft is connected to the water outlet end of the mixing tank; the water inlet end of the folded plate flocculation tank is connected to the water outlet end of the last vertical shaft; the water inlet end of the inclined tube sedimentation tank is connected to the water outlet end of the folded plate flocculation tank, and the water outlet end of the inclined tube sedimentation tank is connected to the clear water channel. The technical scheme of the utility model has the beneficial effects that: on the premise of improving the flocculation effect, the flocculation time is reduced, and the occupied area of the flocculation tank is reduced.
Description
Technical Field
The utility model relates to the technical field of wastewater treatment, in particular to a grid folded plate combined pool.
Background
Flocculation is an important link of water supply treatment, namely, a flocculating agent electrolyte is added, the micro-particle collision is increased by utilizing double-electric-layer compression, adsorption neutralization and under the action of hydraulic disturbance, and a macroscopic-size floc process is formed by virtue of an adsorption bridge frame and a net catching and sweeping action. The quality of the flocculation effect is mainly influenced by the water quality characteristics of raw water, the variety and dosage of the added flocculating agent or coagulant aid, the mixing condition and the flocculation hydraulic condition, wherein the hydraulic condition is mainly determined by the flocculation tank type structure. In the initial development stage of domestic water purification technology, the adopted clapboard flocculation tank utilizes water flow to flow between the clapboards and generate near-wall turbulent flow with the wall surface to spread to the section, so that particles are collided and coalesced. According to the direction of water flow, the water flow is divided into a reciprocating type, a rotary type and a vertical type. Wherein the angle of the reciprocating type clapboard flocculation tank at the turning position in the horizontal direction is 180 degrees, and the local resistance coefficient is large; the turning angle of the rotary clapboard flocculation tank is 90 degrees, so that the proportion of a local water head is relatively reduced; the turning position of the vertical baffle flocculation tank is 180 degrees up and down in the vertical direction, and the vertical baffle flocculation tank has the advantage that the vertical baffle flocculation tank can uniformly enter a subsequent sedimentation tank in the horizontal direction. With the development of water purification technology, mechanical flocculation ponds also appear, and hydraulic flocculation ponds in various forms such as folded plates, grids and grid bars are commonly applied in water purification plants at present. The folded plate flocculation tank is developed on the basis of a vertical flow type partition plate flocculation tank, namely, the straight-line partition plate is changed into a folded line shape, so that the turning times are increased, the turning angle is reduced, the turbulent motion of water flow beneficial to the growth of flocs is generated between the partition plates along the water flow direction, the input energy is homogenized, the energy utilization rate and the flocculation efficiency are improved, and the sedimentation performance of the flocs is improved. The key point is that the velocity gradient G value in the flocculation process is changed slowly from large to small, and the change rule of the floc from small to large is adapted. In order to realize the point, cellular multi-channel folded plates can be adopted, namely a plurality of folded plates are placed in each cell, and the flow velocity is changed in stages by changing the width of a channel through which water flows, so that the velocity gradient change is realized; or a single-channel folded plate is adopted, water flow directly flows between two adjacent folded plates, the angle of the folded plates can be changed, for example, the front section adopts a different-wave folded plate which gradually shrinks, the middle section adopts the same-wave folded plate, the tail section adopts a straight plate and other forms to change the speed, and the speed can be changed by changing the distance between the folded plates, so that the change of the speed gradient is controlled; or a combination of the above. The grid flocculation basin is a flocculation basin which is formed by placing grids or grids between vertical shaft passages of grids to form water gaps or holes to form micro-vortex. The hydraulic conditions are changed by changing the gap size of the grid bars, the hole size of the grid and the number of layers in the vertical shaft, and the purpose is to obtain the change of the velocity gradient G value and develop towards the direction of weakening macroscopic water flow collision, intensifying microscopic water flow collision and enhancing energy dissipation uniformity. The ideal flocculation basin should achieve the least energy consumption with the shortest flocculation time and achieve the flocculation effect with the highest flocculation efficiency.
The classification and the form of the flocculation tank applied in the water plant at present have respective advantages and disadvantages and application range, and particularly when the water treatment capacity is small, the design parameters according to the specifications and manuals are difficult to meet the structural requirements. At different water quantities, the flocculation tank form and the connection for the subsequent precipitation process have different adaptation degrees. Compared with large-scale water plants, small and medium flocculation tanks have more problems from the aspects of tank type structures, water flow states, equipment installation, maintenance and management and the like: (1) the water quantity change is large, and the amplitude variation is large; (2) the structure and the installation size are small, and the construction and the equipment installation are difficult; (3) accumulated mud is easy to be found at the turning and the outlet, and is inconvenient to be removed; (4) the pool type is small, the turning radius is small, the volume utilization coefficient is small, and the short flow coefficient is large; (5) the energy consumption of unit water quantity is larger than that of a large flocculation tank.
Disclosure of Invention
According to the problems in the prior art, the grid folded plate combined pool is provided, and aims to solve the problems that accumulated mud is not easy to clean, energy consumption is high and the like in the prior art.
The technical scheme specifically comprises the following steps:
a grid folded plate combined pool comprises a mixing pool, a grid flocculation pool, a folded plate flocculation pool and an inclined tube sedimentation pool which are sequentially arranged;
a water inlet pipe is arranged at the bottom of the mixing tank;
the grid flocculation tank comprises a plurality of vertical shafts which are connected in sequence, and the water inlet end of the first vertical shaft is connected to the water outlet end of the mixing tank;
the water inlet end of the folded plate flocculation tank is connected to the water outlet end of the last vertical shaft;
the water inlet end of the inclined tube sedimentation tank is connected to the water outlet end of the folded plate flocculation tank, and the water outlet end of the inclined tube sedimentation tank is connected to the clear water channel.
Preferably, a mixing stirrer is arranged in the mixing tank.
Preferably, the vertical shaft is provided with a hole;
and the vertical shafts are communicated through the holes.
Preferably, a plurality of small-hole meshes are arranged in the vertical shaft.
Preferably, the folded plate flocculation tank is internally provided with a different wave folded plate.
Preferably, the inclined tube sedimentation tank is internally provided with:
the finger-shaped groove is arranged at the upper part of the inclined tube sedimentation tank;
the inclined tube is arranged on one side of the finger-shaped groove close to the bottom of the inclined tube sedimentation tank.
Preferably, a plurality of sludge discharge pipes are arranged at the bottom of the inclined pipe sedimentation tank.
The technical scheme of the utility model has the beneficial effects that: the folded plate flocculation mode is applied to small-scale water plants, so that the stable transition of a transition section from a flocculation tank to a sedimentation tank is realized, no horizontal turning exists, the floc breakage caused by flow velocity change is reduced, and the short flow is avoided; the technology of perforated wall water distribution is adopted between the grid flocculation tank and the sedimentation tank, the folded plate is utilized for rectifying and then directly discharging water, and the width of the tank is the same as that of the flocculation tank and the sedimentation tank, so that water is uniformly distributed from the flocculation tank to the sedimentation tank, and the sludge accumulation is avoided; the mesh flocculation is subjected to segmented flocculation, the size of a small vertical shaft is adopted, the flocculation time is reduced on the premise of improving the flocculation effect, and the occupied area of a flocculation pool is reduced.
Drawings
Embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings. The drawings are, however, to be regarded as illustrative and explanatory only and not as restrictive of the scope of the utility model.
Fig. 1 is a schematic structural view of a grid folded plate combined pool of the present invention.
Fig. 2 is a schematic side view of a grid folded plate assembled pool according to the present invention.
FIG. 3 is a graph showing the relationship between the vertical well side length value of the grid flocculation tank, the distance value between the special-shaped folded plates of the folded plate flocculation tank, the water depth value of the water inlet end surface of the inclined tube sedimentation tank and the water depth value and the flow speed of the horizontal flow sedimentation tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The utility model is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
When the inflow of water in the reaction tank is constant, the flow velocity of the water passing section is equal to the flow divided by the area of the section, namely the following relation exists: and v is Q/A, wherein Q is the flow of the current water inlet end of the reaction tank, A is a water passing section, v is the flow velocity corresponding to the section, and the horizontal flow velocity v1 is Q/(B.h 1), wherein B is the width of the inclined tube sedimentation tank, and h1 is the water depth of the inclined tube sedimentation tank according to the characteristics of the sedimentation tank.
According to the characteristics of the inclined tube sedimentation tank, the upper part is an inclined tube area and a clear water area, and the lower part is a water distribution area and a sludge accumulation area. And the flow velocity v2 of the pool width water inlet belt is Q/(B.h 2), wherein B is the width of the pool width water inlet belt of the inclined tube sedimentation tank, and h2 is the water inlet section depth of the inclined tube sedimentation tank and is smaller than the height of the water distribution area.
According to the characteristics of the parallel single-channel folded plate flocculation tank, the tank width and the water flow velocity v3 passing through the section of the folded plate are Q/(alpha B-B), B is the distance between the special-shaped folded plates, and alpha is the width reduction coefficient caused by the width of the channel retaining wall provided with the special-shaped folded plates.
According to the characteristics of the grid flocculation tank, the flow velocity v4 of the vertical shaft is Q/a2, B is the tank width of the grid flocculation tank, a is the side length of a single vertical shaft, and the relationship with the number n of the single-row vertical shafts is as follows: a { [ B- (n-1) · e ]/n }, where e is the width of the partition wall of the hoistway.
By establishing a mathematical model, Q, B is taken as a variable parameter, and the adaptive relation curves among the grid flocculation basin, the folded plate flocculation basin, the horizontal flow sedimentation basin and the inclined tube sedimentation basin can be found out according to the applicable flow rate range, the basin depth height range, the mountable minimum spacing of the special-shaped folded plates, the minimum overhaul size of the grid vertical shaft and the like which are specified by a manual and specifications and the like as the variable ranges, and the adaptive relation curves can be found according to the value of Q, B. The x values of the abscissas of the four curves respectively correspond to the value of the grid flocculation tank a, the value of the folded plate flocculation tank b, the value of the inclined tube sedimentation tank h2 and the value of the horizontal flow sedimentation tank h 1. The y values of the ordinate of the four curves respectively correspond to the flow velocity of the vertical shaft of the grid flocculation tank, the average flow velocity of the channel of the folded plate flocculation tank, the water inlet horizontal flow velocity of the inclined tube sedimentation tank and the horizontal flow velocity of the horizontal flow sedimentation tank.
Q values of less than 50000m can be found3The condition of/d and the tank width B value are under the condition of the width with reasonable engineering, if the average flow velocity of the folded plate flocculation tank is 0.25-0.35 m/s specified in the design manual of the prior art, the parallel channel water distribution form is difficult to realize, namely, according to the calculation result of the design parameters, the folded plate spacing B value is difficult to meet the structural requirement.
However, when the b value is set to a smaller interval, the flow rate can be close to 0.1m/s under a small flow condition, is slightly smaller than the flow rate of the grid, and is closer to the flow rate of the inlet water of the inclined tube sedimentation tank, for example, Q is 50000m3Taking B as an example, 10m as an example, obtaining a relation curve shown in fig. 3, and knowing from the four curves in the graph, taking a grid flocculation tank as a flocculation reaction section of the flocculation tank, wherein the grid flocculation tank can be subdivided into a front flocculation section, a middle flocculation section and a rear flocculation section, changing the hydraulic conditions by changing the number of layers of grids in a vertical shaft to form a speed gradient which is gradually reduced, and taking a differential wave folding plate of a single channel as a transition section connected with a sedimentation tank, thereby obtaining the reaction tank with better flocculation effect.
Referring to fig. 1-2, the present embodiment provides a grid folded plate combined pool, which includes a mixing pool 1, a grid flocculation pool 2, a folded plate flocculation pool 3, and an inclined tube sedimentation pool 4, which are sequentially arranged;
a water inlet pipe is arranged at the bottom of the mixing pool 1;
the grid flocculation tank 2 comprises a plurality of shafts 6 which are connected in sequence, and the water inlet end of the first shaft 6 is connected to the water outlet end of the mixing tank 1;
the water inlet end of the folded plate flocculation tank 3 is connected to the water outlet end of the last vertical shaft 6;
the water inlet end of the inclined tube sedimentation tank 4 is connected to the water outlet end of the folded plate flocculation tank 3, and the water outlet end of the inclined tube sedimentation tank 4 is connected to the clear water channel 15.
The flocculation tank and the sedimentation tank in the embodiment are built together, and the same tank width is adopted, so that the effect of saving the occupied area can be achieved.
In a preferred embodiment, a mixing agitator 5 is provided in the mixing tank 1.
In a preferred embodiment, the shaft 6 is provided with holes 8, 9;
the shafts 6 are communicated with each other through holes 8 or 9.
For example, three shafts 6 are provided, the first shaft 6 and the second shaft 7 are communicated through a hole 9 provided at the lower end, and the second shaft 7 and the third shaft 8 are communicated through a hole 9 provided at the upper end.
In a preferred embodiment, a plurality of small mesh grids 7 are provided within the shaft 6.
In a preferred embodiment, a corrugated plate 10 is arranged in the folded plate flocculation tank 3.
In this embodiment, after passing through the folded plate, the water flows through the tank-wide water-connecting belt 11 into the water distribution area 14 of the inclined tube sedimentation tank 4, then passes through the inclined tube 13, is collected by the finger-shaped groove 12, then is merged into the clear water channel 15, and is transferred to the next water treatment process through the clear water channel 15.
In a preferred embodiment, the inclined tube sedimentation tank 4 is provided with:
a finger-shaped groove 12 arranged at the upper part of the inclined tube sedimentation tank 4;
and the inclined tube 13 is arranged on one side of the finger-shaped groove 12 close to the bottom of the inclined tube sedimentation tank 4.
In a preferred embodiment, the bottom of the inclined tube sedimentation tank 4 is provided with a sludge discharge pipe 16.
The technical scheme of the utility model has the beneficial effects that: the folded plate flocculation mode is applied to small-scale water plants, so that the stable transition of a transition section from a flocculation tank to a sedimentation tank is realized, no horizontal turning exists, the floc breakage caused by flow velocity change is reduced, and the short flow is avoided; the technology of perforated wall water distribution is adopted between the grid flocculation tank and the sedimentation tank, the folded plate is utilized for rectifying and then directly discharging water, and the width of the tank is the same as that of the flocculation tank and the sedimentation tank, so that water is uniformly distributed from the flocculation tank to the sedimentation tank, and the sludge accumulation is avoided; the mode of carrying out the segmentation flocculation by adopting the grid flocculation is beneficial to adopting the small shaft size, and on the premise of improving the flocculation effect, the flocculation time is reduced, and the occupied area of the flocculation tank is reduced.
While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model.
Claims (7)
1. A grid folded plate combined pool is characterized by comprising a mixing pool, a grid flocculation pool, a folded plate flocculation pool and an inclined tube sedimentation pool which are sequentially arranged;
a water inlet pipe is arranged at the bottom of the mixing tank;
the grid flocculation tank comprises a plurality of vertical shafts which are connected in sequence, and the water inlet end of the first vertical shaft is connected to the water outlet end of the mixing tank;
the water inlet end of the folded plate flocculation tank is connected to the water outlet end of the last vertical shaft;
the water inlet end of the inclined tube sedimentation tank is connected to the water outlet end of the folded plate flocculation tank, and the water outlet end of the inclined tube sedimentation tank is connected to the clear water channel.
2. The grid flap assembled tank of claim 1 wherein a mixing agitator is disposed within the mixing tank.
3. The grid flap assembled pool of claim 1, wherein said shaft is provided with holes;
and the vertical shafts are communicated through the holes.
4. The grid flap assembly pool of claim 1, wherein a plurality of small hole grids are provided in said shaft.
5. The grid folded plate combined pond according to claim 1, wherein the folded plate flocculation pond is provided with a different wave folded plate.
6. The grid folded plate combined pool of claim 1, wherein the inclined tube sedimentation pool is internally provided with:
the finger-shaped groove is arranged at the upper part of the inclined tube sedimentation tank;
the inclined tube is arranged on one side of the finger-shaped groove close to the bottom of the inclined tube sedimentation tank.
7. The grid flap assembled pond according to claim 1, wherein a plurality of sludge discharge pipes are provided at the bottom of the inclined tube settling pond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122660119.XU CN216303367U (en) | 2021-11-02 | 2021-11-02 | Grid folded plate combined pool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122660119.XU CN216303367U (en) | 2021-11-02 | 2021-11-02 | Grid folded plate combined pool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216303367U true CN216303367U (en) | 2022-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122660119.XU Active CN216303367U (en) | 2021-11-02 | 2021-11-02 | Grid folded plate combined pool |
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|---|---|
| CN (1) | CN216303367U (en) |
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2021
- 2021-11-02 CN CN202122660119.XU patent/CN216303367U/en active Active
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