CN2303835Y

CN2303835Y - Latticed horizontal-flow sedimentation tank

Info

Publication number: CN2303835Y
Application number: CN 97221848
Authority: CN
Inventors: 王绍文
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-07-25
Filing date: 1997-07-25
Publication date: 1999-01-13
Anticipated expiration: 2007-07-25

Abstract

The utility model relates to a latticed horizontal-flow sedimentation tank, which is composed of a sedimentation tank body, a soil discharging slot, a water discharging slot, a lattice and a soil discharging slope. The utility model is characterized in that the lattice is vertically fixed at a water inlet end of the sedimentation tank body, and the soil discharging slope is arranged on a bottom in a water inlet part of the sedimentation tank body and is connected with a lower end of the lattice. Owing to the lattice added at the water inlet end, the sedimentation tank increases the hydraulic resistance of lattice passing water flow and become a main part of the hydraulic power resistance of the sedimentation tank, the utility model homogenizes the transverse flow velocity distribution of a sedimentation tank station and can prevent high local flow rate phenomenon. After adding the lattice, the utility model greatly reduces the vortex dimension in the horizontal-flow sedimentation tank and eliminates alum granules in the water, and the processing capacity of the horizontal-flow sedimentation tank is improved by 30-40%.

Description

The grid horizontal sedimentation tank

The rectangular sedimentation tank water inlet water distribution inequality that adopts at present, this is because now general perforation style hydraulic resistance is too little, this resistance can not account for the major portion of hydraulic resistance in the settling tank, it is uneven to make in the settling tank flow velocity distribute, and obviously can not reach the precipitation result of expection in the high place of flow velocity.The sedimentary hydraulics of horizontal flow basin can not show a candle to shallow pond, and current are in turbulence state, and turbulent eddy has produced the serious disturbance effect to the sedimentation of reacting incomplete little alumina blossom particles.Although rectangular sedimentation tank all is to catchment in its tail surface, it is the shortest that the surface water of horizontal sedimentation tank enters the water collecting equipment distance, need not turn, and the hydraulic resistance minimum, so surface water enters the flow maximum of catchment area.But from waterpower calculate horizontal flow basin as can be seen, the current of bottom also will enter the catchment area, only the distance that flows away the closer to the water of bottom is long more, that changes is curved big more, and its hydraulic resistance is big more, so it is few more to enter the quantity of catchment area the closer to the water of bottom.Therefore the sedimentation effect of horizontal sedimentation tank is bad, influence effluent quality, and the settling tank equipment volume is big, and water retention time is long.

The purpose of this utility model is to make a kind of grid horizontal sedimentation tank, it is Transverse to the flow direction increase multi-layer net at present horizontal sedimentation tank water intake end, increase the hydraulic resistance of net current, prevented that some local velocity was too high, improved the water treatment capacity of settling tank.

The utility model mainly is made up of settling tank body 1, grid 2, spoil disposal slope 3, mud drainage slot 4, effluent trough 5, as shown in Figure 1, 2, 3.It is characterized in that: grid 2 verticals are fixed on the water inlet end Nei Chu of settling tank body 1, and spoil disposal slope 3 is positioned on the bottom surface of settling tank body 1 water inlet end, and join with grid 2 lower ends, constitute the grid horizontal sedimentation tank.

The utility model is to set up multi-layer net 2 at horizontal sedimentation tank water intake end Transverse to the flow direction.This can be in two kinds of situation, and for newly-built horizontal sedimentation tank, cancellation water inlet portion perforation tracery wall replaces with multi-layer net 2; Concerning original horizontal sedimentation tank is transformed, can after the perforation tracery wall, set up multi-layer net 2.For the ease of the spoil disposal of grid part is set, water intake end at horizontal sedimentation tank is provided with aslope spoil disposal slope 3, grid 2 be arranged on spoil disposal slope 3 above, and between the inclined-plane on grid 2 and spoil disposal slope, leave certain spoil disposal space, so that the mud that is deposited on the spoil disposal slope 3 slides automatically.

The utility model compared with prior art, following benefit is arranged: owing to set up multi-layer net 2 and spoil disposal slope 3 at the upstream end place of horizontal sedimentation tank, following effect is arranged: 1, increased the hydraulic resistance of net current, make it become the major portion of settling tank hydraulic resistance, so greatly homogenizing settling tank along horizontal velocity flow profile, prevent the high phenomenon of some partial area flow velocity.Mean flow rate changed the inertial effect that produces when 2, utilizing the net current, increased the collision probability of different scale alumina blossom particles.3, set up after the grid 2, reduced horizontal sedimentation tank mesoscale eddies yardstick significantly, increased the ratio of small vortex, utilize the centrifugal inertia of micro-vortex, increase alumina blossom particles collision probability.So just strengthened the throwing out of horizontal sedimentation tank feed-water end greatly, eliminated some and react incomplete little alumina blossom particles, strengthened the alumen ustum sedimentation function, effectively improved water quality, can make the processing power of horizontal sedimentation tank improve 30-40%.

Description of drawings:

Fig. 1 is an overall structure sectional view of the present utility model;

Fig. 2 is a vertical view of the present utility model;

Fig. 3 is the A-A sectional view of the utility model Fig. 1.

Embodiment of the present utility model:

The utility model mainly by: settling tank body 1, grid 2, spoil disposal slope 3, mud drainage slot 4, effluent trough 5 are formed, wherein settling tank body 1, mud drainage slot 4, effluent trough 5 usefulness Steel Concrete are made, grid 2 usefulness steel, wood, plastics are made grid, spoil disposal slope 3 usefulness concrete are made, and are that the spoil disposal that utilizes of slope shape is used.

Spoil disposal slope 3 is placed on the end inner bottom surface of intaking in the settling tank body 1, multi-layer net 2 verticals are fixed on water inlet end in the settling tank body 1, and with join above the spoil disposal slope 3, mud drainage slot 4, effluent trough 5 is integral with settling tank body 1, forms the grid horizontal sedimentation tank.

Claims

1, a kind of grid horizontal sedimentation tank, comprise settling tank body, mud drainage slot, effluent trough, it is characterized in that: grid (2) vertical is fixed on the water inlet end Nei Chu of settling tank body (1), spoil disposal slope (3) is positioned on the inner bottom surface of settling tank body (1) water inlet end, and join in grid (2) lower end, constitute the grid horizontal sedimentation tank.