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Chromium removal filler, filler device and chromium removal method thereof

A filter element and tank technology, which is applied in the field of sewage treatment, can solve the problems of poor chromium removal filler and adsorption time, increased difficulty in water treatment, and increased treatment costs, and achieves good removal effect, good environmental benefits, social benefits, and costs. low effect

Pending Publication Date: 2020-11-27
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing device for removing chromium from runoff water, poor design of chromium removal filler and adsorption time lead to low efficiency of chromium removal, which in turn increases the difficulty and cost of water treatment

Method used

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  • Chromium removal filler, filler device and chromium removal method thereof
  • Chromium removal filler, filler device and chromium removal method thereof
  • Chromium removal filler, filler device and chromium removal method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]The cross-sectional size of the packing device is determined according to the rainfall situation in each region. Taking Nanjing in 2014 as an example, the design standard for the rainfall intensity in Nanjing is 98.106 (L / s ha) for I, and 0.45 for the runoff coefficient C. Water area A is 1.5ha, and C, I and A are brought into formula Q=CIA (a) and can get: runoff Q=CIA=0.45*98.106*1.5=66.2 (L / s); The flow velocity V of quick filter tank Take 14m / h, put the runoff Q and V into formula A 0 The horizontal cross-sectional area A of tank body 1 is obtained in =Q / V (b) 0 =Q / V=66.2(L / s) / 14(m / h)=17m 2 The height of the tank body 1 is selected as 1.2m. After the size of the tank body 1 is determined, the filter element 6 is socketed in the tank body 1 and connected with the inner wall of the tank body 1. After determining the size of the filter element 6, the tank body 1, the water inlet pipe 2, the outlet Water pipe 3, water inlet valve 4, water outlet valve 5, filter element...

Embodiment 2

[0044] Containing Cr with a concentration of 10mg / L 6+ The runoff water flows into the filler device with a height of 20cm for the chromium removal filler through the water inlet pipe 2. After staying in the device for 20min, a water sample is taken from the outlet pipe 3, and its concentration is 0.5mg / L, the removal rate of chromium is 95%.

Embodiment 3

[0046] Cr at a concentration of 10mg / L 6+ The runoff water flows into the device with a height of 20cm through the water inlet pipe 2, and after the device stays for 40min, a water sample is taken from the outlet pipe 3, and its concentration measured by a plasma emission spectrometer (ICP-OEX) is 0.32 mg / L. The removal rate of chromium is 96.8%.

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Abstract

The invention discloses a chromium removal filler, a filler device and a chromium removal method thereof. The chromium removal filler is prepared by mixing palm kernel shells and cobblestones according to the volume ratio of 4: 1. 1. A water inlet pipe and a water outlet pipe are respectively arranged at the upper and lower parts of the side wall of a tank body of the filler device; a water inletvalve and a water outlet valve are respectively arranged at the water inlet pipe and the water outlet pipe; a filter element is arranged on the inner wall of the tank body; the chromium removal filleris filled in the filter element; when the device is used for removing chromium, palm kernel shells and cobblestones are added into the filter element in proportion, and cobblestones are laid at the upper part of the palm shell to prevent palm kernel shells from flying out; and then chromium-containing runoff water is introduced through a water inlet pipe for contact treatment. the process is simple, the operation is convenient, the palm kernel shell is used as a filtering and adsorbing material, is low in price and easy to obtain, is low in operation cost, contains different functional groups, can form complexes and chelates with heavy metal ions including chromium ions, and is high in chromium removal efficiency, the filter element is movably designed, the filter material is convenient to clean and replace, and the environment-friendly effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a chromium removal filler, a filler device and a chromium removal method thereof. Background technique [0002] With the rapid rise of my country's industry, a large amount of chromium-containing sewage is discharged into nearby rivers and lakes without treatment, seriously affecting the water quality safety of the water body and destroying the balance of the water body ecosystem. Since most runoff water contains heavy metal chromium, and heavy metal chromium is extremely harmful to the human body, chromium removal is an essential and important part of runoff water treatment. Existing technical methods for removing chromium in runoff water mainly include physical, chemical and biological methods. The most common methods are chemical precipitation and biological methods to remove heavy metal chromium. The legal precipitation method is to form an insoluble pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24C02F1/28B01J20/30C02F101/22
CPCB01J20/24B01J20/103C02F1/286C02F1/281C02F2101/22B01J2220/485
Inventor 于江华凌长
Owner NANJING UNIV OF INFORMATION SCI & TECH