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Treatment technology of mother liquor of iron oxide red

A treatment process, iron oxide red technology, applied in the field of water treatment, can solve the problems of water pollution, high ferrous ion content, high chroma, etc., achieve the effects of reducing evaporation energy consumption, realizing recycling, and increasing salt content

Inactive Publication Date: 2018-07-24
绍兴齐英膜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above-mentioned production process of iron oxide red, acid waste water containing a large amount of ferrous ions and ammonium ions will be produced
This type of wastewater has the characteristics of high chroma, strong acidity, high concentration of ammonia nitrogen, and high content of ferrous ions. Direct discharge will cause serious pollution to water bodies.
[0004] Chinese patent publication CN104743746A discloses a treatment method for iron oxide red wastewater, which uses the combination of flocculation and sedimentation+blowing+biochemical treatment to realize the treatment of iron oxide red wastewater, but the blowing off process used in the process is harmful to Ammonia nitrogen treatment has the disadvantages of incomplete blow-off, easy scaling of fillers, and secondary pollution caused by overflowing ammonia nitrogen.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A mother liquor produced for the production of iron oxide red pigments has the following parameter characteristics: pH=3.0, ammonia nitrogen value 4800mg / L, sulfate radical content 16492mg / L, and salt content 2.3%.

[0031] A zero-discharge treatment process for iron oxide red mother liquor, the process includes the following steps:

[0032] (1) Pretreatment of flocculation and sedimentation: Add an appropriate amount of ammonia water with a mass concentration of 25-28% to the iron oxide red mother liquor under stirring, adjust the pH of the mother liquor water to 9, and then add a small amount of PAM solution to flocculate the mother liquor water Settling, and then pumped into the filter press system for filter press to obtain filtrate and iron mud. The obtained iron mud can be used as seed crystals to produce iron oxide red.

[0033] (2) Pre-oxidation: the filtrate obtained in step (1) is subjected to aeration treatment to oxidize the residual ferrous ions in step (1) into ...

Embodiment 2

[0040] A mother liquor produced in the production of iron oxide red pigments has the following parameter characteristics: pH=2.8, ammonia nitrogen value is 5600mg / L, sulfate radical content is 19218mg / L, salt content is 2.68%.

[0041] A zero-discharge treatment process for iron oxide red mother liquor, the process includes the following steps:

[0042] (1) Pretreatment of flocculation and sedimentation: Add an appropriate amount of ammonia water with a mass concentration of 25-28% to the iron oxide red mother liquor under stirring, adjust the pH of the mother liquor water to 10, and then add a small amount of PAM solution to flocculate and settle the mother liquor. , And then pumped into the filter press system for filter press to obtain filtrate and iron mud. The obtained iron mud can be used as seed crystals to produce iron oxide red.

[0043] (2) Pre-oxidation: the filtrate obtained in step (1) is subjected to an appropriate amount of hydrogen peroxide to oxidize the residual fe...

Embodiment 3

[0050] A mother liquor produced in the production of iron oxide red pigments has the following parameter characteristics: pH=3.5, ammonia nitrogen value 4200mg / L, sulfate content 14560mg / L, and salt content 2%.

[0051] A zero-discharge treatment process for iron oxide red mother liquor, the process includes the following steps:

[0052] (1) Pretreatment of flocculation and sedimentation: Add an appropriate amount of ammonia water with a mass concentration of 25-28% to the iron oxide red mother liquor under stirring, adjust the pH of the mother liquor water to 9.6, and then add a small amount of PAM solution to flocculate the mother liquor water Settling, and then pumped into the filter press system for filter press to obtain filtrate and iron mud. The obtained iron mud can be used as seed crystals to produce iron oxide red.

[0053] (2) Pre-oxidation: the filtrate obtained in step (1) is subjected to an appropriate amount of hydrogen peroxide to oxidize the residual ferrous ions in...

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PUM

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Abstract

The invention discloses a treatment technology of mother liquor of iron oxide red. The treatment technology comprises the following six steps: preprocessing by flocculation and depositing, pre-oxidizing, adjusting acid, performing low-pressure reverse osmosis, performing high-pressure reverse osmosis and performing MVR concentration evaporation. The technology is low in energy consumption, high inresource utilization rate, high in wastewater treatment efficiency, complete to treat, and free from secondary pollution; in addition, a complete closed-ring system is formed in the whole technology;the wastewater is recycled and is not drained.

Description

Technical field [0001] The invention belongs to the technical field of water treatment, and particularly relates to a treatment process of iron oxide red mother liquor. Background technique [0002] Iron oxide red, also known as iron red, rust red, iron vermilion, etc., its chemical name is iron trioxide, its hiding power and coloring power are very high, and its light resistance, heat resistance, weather resistance, and pollution resistance are excellent. Due to its excellent performance and low price, the iron red pigment is widely used. Iron red can be mixed into alkaline building materials such as cement and lime to make colored cement and colored lime; iron red mixed with rubber products can have a good reinforcement and coloring effect, and can prevent ultraviolet degradation. Iron red anti-rust primer is almost used in most middle and low-grade anti-rust construction projects, saving a lot of precious and toxic pigments containing lead, zinc, and chromium. [0003] There a...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F103/34
CPCC02F1/048C02F1/441C02F1/52C02F1/66C02F1/72C02F7/00C02F9/00C02F2001/007C02F2103/34C02F2301/08
Inventor 李刚贾军芳郑鑫陈丽娜赵明辉智锁红
Owner 绍兴齐英膜科技有限公司
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