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Method for treating cadmium-containing or/and fluorine-containing wastewater of high-temperature environment-friendly bright red pigment

A treatment method, a bright red technology, applied in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of difficult dehydration, slow sludge sedimentation, and difficulty in effluent. To achieve the effect of effective and stable treatment and sludge reduction

Pending Publication Date: 2021-11-02
JIANGXI JINHUAN PIGMENTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process has the advantages of simple method, convenient treatment, and low cost, but has disadvantages such as difficulty in reaching the standard for effluent after treatment, slow sludge settling and difficult dehydration.

Method used

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  • Method for treating cadmium-containing or/and fluorine-containing wastewater of high-temperature environment-friendly bright red pigment
  • Method for treating cadmium-containing or/and fluorine-containing wastewater of high-temperature environment-friendly bright red pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method for treating cadmium-containing and fluorine-containing wastewater, comprising the steps of:

[0038] Take 1000ml of waste water containing cadmium and fluoride, adjust pH=8, add 10ppm sodium sulfide, stir for 1min, add 300ppm ferrous sulfate, 200ppm polyferric sulfate, stir rapidly for 5min, then add 100ppm polyaluminum chloride, stir for 2min, add 1ppm The polyacrylamide (PAM) was stirred at a slow speed for 1 min, and larger particles were produced, and then settled for 2 h, and the supernatant was taken to measure cadmium.

[0039] The measurement results show that the cadmium content of the supernatant is 0.07ppm, then remove fluoride, add 600ppm defluoride agent, stir quickly for 2min, then add 1ppm of PAM, stir at a slow speed for 1min, larger particles are produced, settle for 2h, take The supernatant was tested for fluoride. Table 1 shows the measurement results of fluorine.

Embodiment 2

[0041] Take 1000ml of waste water containing cadmium and fluorine, adjust pH=9, add 10ppm sodium sulfide, stir for 1min, add 300ppm ferrous sulfate, 200ppm polyferric sulfate, stir rapidly for 5min, then add 100ppm polyaluminum chloride, stir for 2min, add 1ppm Stir at a slow speed for 1 min to produce larger particles, settle for 2 h, and take the supernatant to measure cadmium.

[0042]The measurement results show that the cadmium content in the supernatant is 0.069ppm, then remove fluoride, add 600ppm defluoride agent, stir rapidly for 2min, then add 1ppm of PAM, stir at a slow speed for 1min, larger particles are produced, settle for 2h, take The supernatant was tested for fluoride. Table 1 shows the measurement results of fluorine.

Embodiment 3

[0044] Take 1000ml of waste water containing cadmium and fluoride, adjust pH=10, add 10ppm sodium sulfide, stir for 1min, add 300ppm ferrous sulfate, 200ppm polyferric sulfate, stir rapidly for 5min, then add 100ppm polyaluminum chloride, stir for 2min, add 1ppm Stirring at a slow speed for 1 min, larger particles were produced, and settled for 2 h, and the supernatant was taken to measure cadmium.

[0045] The measurement results show that the cadmium content of the supernatant is 0.065ppm, then remove fluoride, add 600ppm defluoride agent, stir rapidly for 2min, then add 1ppm of PAM, stir at a slow speed for 1min, larger particles are produced, settle for 2h, take The supernatant was tested for fluoride. Table 1 shows the measurement results of fluorine.

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Abstract

The invention discloses a method for treating cadmium-containing or / and fluorine-containing wastewater of a high-temperature environment-friendly bright red pigment. The method comprises the following steps: firstly, collecting various types of wastewater into a homogenizing tank for homogenizing, detecting the content of heavy metal cadmium and fluorine in the wastewater by using a wastewater detection instrument, then adjusting a pH value to 9-10, performing full homogenizing, introducing the wastewater into a reaction tank, continuously adding a multi-component sulfur-containing reactant, an iron adsorbent, an aluminum-containing settling agent and an organic flocculant at an interval, conducting treating until cadmium is less than 0.1 ppm, and after settling, introducing clear liquid into a fluorine removal reaction tank, and adding a polyaluminum-iron mixed salt to remove fluorine so as to allow the treated fluorine to be less than 10 PPM. According to the method, heavy metal cadmium is treated by adopting a reaction sedimentation flocculation method, a large amount of positively charged colloid is formed by adopting a surface modifier polyaluminum iron, fluorine is treated by utilizing an ion exchange method and other two-stage treatment methods, and water quality can stably reach the Integrated Wastewater Discharge Standard in China.

Description

technical field [0001] The invention relates to a method for treating waste water, in particular to a method for treating waste water containing cadmium or / and fluorine in high-temperature environmental protection bright red material. Background technique [0002] Ceramic pigments, especially red pigments, are an indispensable material for ceramic and glaze coloring. They are usually produced by more complicated processes. The demand for products has become increasingly prominent. The bright red pigment product of ceramics produced by traditional technology has not been able to solve the contradictions of bright, saturated and color stability after ceramic coloring, often the two cannot be taken into account. With the continuous improvement of people's material living standards and the continuous strengthening of environmental protection awareness, a kind of pigment that can endow ceramic red products with bright colors and stable performance is urgently placed in front of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/14C02F101/20
CPCC02F9/00C02F2101/14C02F2101/20C02F1/5236C02F1/56C02F1/42C02F1/281
Inventor 尹平陈仁华李婧余景峰
Owner JIANGXI JINHUAN PIGMENTS