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Venturi internal component for sedimentation tank

A technology of Venturi and internal components, applied in the field of sewage treatment equipment, to achieve the effect of large flow and prolonging the operation and maintenance cycle

Active Publication Date: 2020-09-08
CHINA CONSTR THIRD BUREAU GREEN IND INVESTMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems in the prior art, the present invention provides a Venturi internal member for a sedimentation tank. The high-efficiency sedimentation tank of the present invention allows the sedimentation and separation of particulate matter to be performed in a turbulent flow state with a large flow rate, and has more advantages than the traditional sedimentation method. The large unit volume processing capacity is beneficial to realize the miniaturization of the sedimentation tank; at the same time, the high-efficiency sedimentation tank of the present invention can be automatically cleaned during operation without clogging, which is beneficial to the long-term continuous operation of the sedimentation tank

Method used

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  • Venturi internal component for sedimentation tank
  • Venturi internal component for sedimentation tank
  • Venturi internal component for sedimentation tank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] see figure 1 , providing a Venturi inner member for a sedimentation tank, the Venturi inner member 10 includes an outer shell and a Venturi tube 14 located in the outer shell; the outer shell includes a lower shell tube with a larger diameter at the lower part 11, the upper shell tube 12 with a smaller diameter located on the upper part and the conical connecting shell 13 connecting the lower shell tube 11 and the upper shell tube 12; the Venturi tube 14 is formed between the lower shell tube 11 and the connecting shell 13 In the space, and the end of the diffuser at its top is connected to the lower end of the upper shell tube 12 by a swirl ring 15; the Venturi tube 14, the lower shell tube 11, the upper shell tube 12, the connection shell 13 and the swirl ring 15 are arranged concentrically; the venturi pipe 14 has a throat 16 and a water inlet 18 positioned at the bottom for raw water to flow in; an annular sludge passage is formed between the outer wall of the ventu...

Embodiment 2

[0051] see Figure 5 , 9 , the difference from Embodiment 1 is that the distribution channel 28 is a closed tubular structure with an independent side wall, one end of which is directly connected to the water inlet 5 in a sealed manner; an open space is formed between two adjacent closed channels 28. The mud collection area 27.

[0052] The vertical dimension (which can be understood as height) of the distribution channel 28 in its length direction is gradually reduced to offset the distribution caused by the diversion into the multiple venturi internal components 10 when the raw water flows along its length direction The pressure drop between upstream and downstream in the channel 28 ; thereby allowing the raw water to maintain substantially the same pressure when it enters the inlet of the venturi internal member 10 at different positions.

[0053] The upper surface of the distribution channel 28 is provided with a number of connecting pipes 30 correspondingly connected to...

Embodiment 3

[0056] see Figure 11, the difference from Embodiment 1 or 2 is that the through hole 26 and the swivel opening 25 are arranged inscribed in the same direction, which prevents the large particle matter in the sludge channel 17 from relapsing through the swirling inertia of the large particle sludge into the interior of the throat 16. When the muddy water containing sludge particles that swirls into the sludge channel 17 through the swivel opening 25 reaches the throat pipe 16, most of the particles are thrown to the outer wall of the sludge channel 17 due to centrifugal force, and some of them are still attached to the throat. The particles flowing on the outer wall of the pipe 16 will also slide through the outside of the through hole 26 because of its swirling direction is the same as the inscribed direction of the through hole 26, and the swirling inertia of the particles makes the flow through the through hole 26 Most of the particulate matter at the hole 26 is separated ...

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Abstract

The invention relates to a Venturi internal component for a sedimentation tank. Particulate matter impurities in water flow are promoted to coagulate and grow through jet flow mixing, and then the grown particulate matters are introduced into a sludge channel on the outer side at the tail end of a Venturi tube by virtue of a cyclone ring and are discharged into a sludge collecting area; in the process, treatment and flowing of raw water and sedimentation and discharge of particulate matters respectively occur in two relatively independent spaces of the Venturi tube and the sludge channel, andmutual interference does not exist; the flowing state in the internal component is not limited by laminar flow and is mainly in a strong turbulence state, so that the water treatment flow is large; the strong turbulence flow state is unfavorable for the generation and attachment of a biological membrane, and the equipment operation state can be kept stable for a long time; through cooperative configuration of the cyclone ring and a through hole in a venturi in an internally tangent direction, most of the particulate matters, especially large particulate matters, entering the sludge channel canactively avoid the through hole or slide through the surface of the through hole by means of cyclone inertia, and the particulate matters are prevented from entering the venturi again along with water flow through the through hole; fine particles of which the particle sizes do not grow up are allowed to enter the venturi again to participate in a new coagulation growth process; meanwhile, the through hole at the venturi is not easy to block, and the equipment operation and maintenance period is prolonged.

Description

technical field [0001] The invention relates to sewage treatment equipment, in particular to a Venturi internal component used in a sedimentation tank. Background technique [0002] Settlement treatment is an important part of the sewage treatment process. Compared with filtration treatment, it has obvious advantages in the removal of particulate matter in water, such as large processing capacity, low cost, no clogging problem, and continuous operation; therefore, it is widely used in the field of sewage treatment. In the prior art, in order to improve the sedimentation efficiency of the sedimentation tank, the shallow sedimentation theory is usually used to install internal components such as inclined plates or inclined pipes in the sedimentation tank to shorten the sedimentation distance of the particles. However, such internal components are extremely susceptible to the disturbance of the fluid in the tube or between the plates while shortening the particle settling dista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D21/02B01D21/00
CPCB01D21/02B01D21/0006Y02W10/10
Inventor 尚铁军
Owner CHINA CONSTR THIRD BUREAU GREEN IND INVESTMENT CO LTD