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Water treatment method and device for synchronously realizing filtering and back washing

A technology for backwashing water and a treatment device, applied in the field of water treatment, can solve the problems of low wastewater treatment efficiency and process performance, and achieve the effects of improving sewage interception capacity and work efficiency, saving flushing water, and reducing energy consumption and cost.

Inactive Publication Date: 2013-01-02
HUBEI ZHONGBI ENVIRONMENTAL PROTECTION TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of low efficiency and process performance of the existing wastewater treatment, and provide a water treatment process in which filtration and backwashing are carried out synchronously

Method used

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  • Water treatment method and device for synchronously realizing filtering and back washing
  • Water treatment method and device for synchronously realizing filtering and back washing
  • Water treatment method and device for synchronously realizing filtering and back washing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Table 1 Test conditions and results of synchronous filtration and backwashing water treatment device (1)

[0033]

[0034] The diameter of the filter tank is 1.5m, one sand distributor, and the angle of the sand dividing plate is 65°. The average amount of suspended solids in raw water is 326mg / L, and the average filtration rate is 9.0m / h. The average amount of suspended solids in the water was measured to be 18mg / L. The removal rate of suspended matter is 94.5%. Sand lifting pump working time T 1 is 5 minutes, and the amount of sand extraction is Q 1 2L / h, backwashing time is T 2 is 1 minute, and the settling time T 3 0.5 minutes, backwash water emptying time T 4 For 8 minutes, the average amount of suspended solids in the backwash drainage was measured to be 80mg / L. The duty cycle T is 14.5 minutes.

Embodiment 2

[0036] Table 2 Test conditions and results of synchronous filtration and backwashing water treatment device (2)

[0037]

[0038] The diameter of the filter tank is 1.8m, there are 2 sand distributors, and the angle of the sand dividing plate is 62°. The average amount of suspended solids in raw water is 310mg / L, and the average filtration rate is 9.0m / h. The average suspended solids in the water was measured to be 15mg / L. The removal rate of suspended matter is 95.2%. Sand lifting pump working time T 1 is 8 minutes, the amount of sand extraction Q 1 2.5L / h, backwashing time is T 1 1.5 minutes, settling time T 3 is 1.5 minutes, and the backwash water emptying time is T 4 For 8.5 minutes, the average amount of suspended solids in the backwash drainage was measured to be 76mg / L. The duty cycle T is 19.5 minutes.

Embodiment 3

[0040] Table 3 Test conditions and results of synchronous filtration and backwashing water treatment device (3)

[0041]

[0042] The diameter of the filter tank is 2m, there are 4 sand distributors, and the angle of the sand dividing plate is 60°. The average amount of suspended solids in raw water is 330mg / L, and the average filtration rate is 9.0m / h. The average suspended solids in the water was measured to be 13mg / L. The removal rate of suspended matter is 96.1%. Sand lifting pump working time T 1 10 minutes, the amount of sand extraction Q 1 2.5L / h, backwash time T 2 is 2 minutes, the settling time T 3 2 minutes, backwash water emptying time T 4 For 10 minutes, the average amount of suspended solids in the backwash drainage was measured to be 63mg / L. The duty cycle T is 24 minutes.

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Abstract

The invention discloses a water treatment device and method for synchronously realizing filtering and back washing. A filtering tank is installed on a supporting support, and the device is characterized in that the lower part of the filtering tank is connected with a water inlet tube and a water distribution device; a sand distribution device is arranged below the water distribution device; filter materials are placed in the filtering tank; a water outlet groove and a water discharge tube are arranged on the upper part of the filtering tank; a sand storage hopper is arranged at the bottom of the filtering tank; the sand storage hopper is externally connected with a sand transportation tube and a sand extraction pump; a back washing chamber is installed on the upper part of the filtering tank; the sand transportation tube is connected with the back washing chamber; sand-water separation is carried out on back washing water and inlet gas, clean sand enters a sand cleaning chamber and falls down a filter material layer; and separated back washing sewage is discharged out of the filtering tank from a back washing tube. A mode that waste water flows upwards is adopted, the filter material with the maximum sewage cutting amount in the filtering tank is located on the lower part of the whole filtering layer, sand in a lower layer falls down, replacement and changing are convenient through sand lifting, filtering and back washing can be synchronously operated, continuous operation of a filtering device is achieved, filtering layer sewage cutting capacity and work efficiency are improved, and the energy consumption and cost are reduced.

Description

technical field [0001] The invention belongs to the technical field of water treatment. The invention relates to a water treatment filter device and a treatment process, in particular to a water treatment method and a device thereof for synchronously performing continuous filtration by filtering and backwashing. technical background [0002] In the current industrial wastewater treatment industry, due to the wide variety of water to be treated and the different requirements for effluent quality, with the improvement of treatment requirements, the quality of effluent water is becoming increasingly strict, and the filter device that plays a key role in the quality of effluent water has become a key research object. In particular, oily waste water is viscous and easily clogs the filter material, and it has higher requirements for continuous operation of the process; the processing of fine industries has higher requirements for water quality, which will become the key factors re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D24/16B01D24/46
Inventor 李孟张斌刘晓光张玉婷
Owner HUBEI ZHONGBI ENVIRONMENTAL PROTECTION TECHCO
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