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Fine sand filter tank and device with medium upward flow filtering speed

A technology of filtration speed and fine sand, applied in the direction of loose filter material filter, filtration separation, gravity filter, etc., can solve the problems of slow filtration speed, poor ability to adapt to raw water turbidity, long maintenance period, etc., to achieve backwashing Simple operation, ideal processing effect, easy to automate effects

Active Publication Date: 2020-06-19
新疆水利水电规划设计管理局 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a fine-sand filter tank and device with an upward flow medium filtration rate, which overcomes the above-mentioned deficiencies in the prior art, and can effectively avoid relying on coagulants and fast filters in the existing water treatment technology to adapt to raw water turbidity. Poor filter capacity, complex backwashing process, short operating period, high operating costs, and slow filter tanks have problems such as slow filtration rate, poor ability to adapt to raw water turbidity, long maintenance period, and inability to automatically flush the filter layer

Method used

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  • Fine sand filter tank and device with medium upward flow filtering speed
  • Fine sand filter tank and device with medium upward flow filtering speed

Examples

Experimental program
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Embodiment 1

[0052] Example 1: The pool body 1 of this filter has a net size of 0.5m×0.5m×1.6m (length×width×height), and the supporting filter layer 7 is made of coarse sand with a thickness of 0.15m and a particle size of 1mm to 3mm. Fine pebbles, fine sand filter layer 8 adopts fine sand with a thickness of 0.45m and a particle size of 0.16mm to 0.36mm. The filter material unevenness coefficient K80=1.8, the filtration rate is 0.65m / h, and the total length of the long handle filter head is 0.35m , the height of entering the supporting filter layer 7 is 0.1m, the spacing is 0.1m, and the water depth of the water outlet chamber 9 is 0.4m.

[0053] The operation status of this filter: the cumulative operation time is 22 days, the maximum turbidity of the raw water is above 1000NTU, the minimum turbidity is 65NTU, the average turbidity is 432NTU, the turbidity of the effluent is 0NTU to 0.72 NTU, the supporting filter layer 7 and fine The operating water head of the sand filter layer 8 is 0...

Embodiment 2

[0054]Embodiment 2: The pool body 1 net size of this filter tank and the structure of the supporting filter layer 7 are the same as above, and the fine sand filter layer 8 adopts a thickness of 0.50m, a particle size of 0.27mm to 0.55mm fine sand, and a filter material inhomogeneity coefficient K80=1.6, the filtration rate is 2.5m / h.

[0055] The operation of the filter: the cumulative operating time is 16 days, the maximum turbidity of the raw water is above 1000NTU, the minimum turbidity is 240NTU, the average turbidity is 550NTU, the turbidity of the effluent is 10NTU to 30NTU, and the weak backwash cycle is 5h to 12h , The strong backwash cycle is 10 days, and the operating head of the filter is 0.15m to 0.40m.

[0056] Since the filtration rate of this filter is medium, the plane size of each unit filter layer should also be controlled from 0.5m×0.5m to 1.2m×1.2m. Therefore, in the specific implementation process, when the water filtration scale is large , can adopt the ...

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Abstract

The invention relates to the technical field of water treatment, particularly to a fine sand filter tank and device with medium upward flow filtering speed. The fine sand filter tank comprises a tankbody and a water inlet backwashing assembly, wherein the water inlet backwashing assembly comprises a mud storage water box and a partition plate, the partition plate divides the tank body into an upper filtering chamber and a lower water inlet chamber, a supporting filtering layer and a fine sand filtering layer are sequentially distributed on the partition plate from bottom to top, a water outlet chamber is formed in the tank body above the fine sand filtering layer, the supporting filtering layer is formed by stacking particles from bottom to top according to the particle size from large tosmall, and the fine sand filtering layer is formed by stacking fine sand from bottom to top according to the particle size from large to small. The fine sand filter tank and the fine sand filter device are reasonable and compact in structure and convenient to use, and have the characteristics of no dependence on any coagulant, strong turbid water adaptability, long water filtering period, convenience in backwashing and the like.

Description

technical field [0001] The invention relates to the technical field of water treatment, and relates to an upward flow medium filtration speed fine sand filter tank, and also includes an upward flow medium filtration speed fine sand device. Background technique [0002] At present, modern large and medium-sized water plants all adopt the technical scheme of "step by step, step by step" for water filtration. This scheme is mainly divided into three stages. The first stage is the pre-sedimentation treatment of raw water. Precipitation makes the water turbidity generally less than 500NTU. The second stage is to reduce the water turbidity to below 20NTU through dosing, mixing, flocculation and sedimentation. The third stage is to filter through the fast filter to make the water turbidity less than 1NTU. . The fast filter is a water filtration device based on this process. It has many types. According to the direction of water flow, it can be downward flow, upward flow, two-way f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D24/00B01D24/10B01D24/46
CPCB01D24/10B01D24/4636B01D24/007
Inventor 裴建生邓铭江李江李琳李湘权克里木·艾合买提马品非吾提库尔·胡斯曼
Owner 新疆水利水电规划设计管理局
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