Biochemical exterior drainage decoloring agent and preparation method thereof

A decolorizing agent and biochemical technology, applied in metallurgical wastewater treatment, adsorption water/sewage treatment, etc., can solve the problems of large-scale application of activated carbon due to cost constraints, easy decomposition of flocculated substances, and high price of activated carbon, and achieve excellent adsorption and enhanced Effect of pore-forming reaction and improvement of adsorption performance

Inactive Publication Date: 2012-07-04
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main component of polymer quaternary ammonium salt decolorizer is polymer organic matter. The principle of decolorization is mainly flocculation. The chroma in water is removed with the accumulation and flocculation of flocculant. This kind of decolorizer needs to be cleaned immediately after decolorization. Otherwise, the flocculated substances are easy to decompose. In addition, this type of decolorizing agent will introduce quaternary ammonium salts into the water, and a small amount will remain in the water while removing the color, thereby causing secondary pollution to the wastewater. And there is also the problem of environmental impact in the follow-up treatment of the flocs collected after flocculation
The adsorption effect of activated carbon is good without secondary pollution, but activated carbon is expensive, and it is difficult to apply it on a large scale in industry. At present, the price of activated carbon on the market is about 5,000 yuan / ton. High price and high cost limit the use of activated carbon in wastewater. Large-scale application in the industry, currently only used in the deep purification of tap water and drinking pure water

Method used

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  • Biochemical exterior drainage decoloring agent and preparation method thereof
  • Biochemical exterior drainage decoloring agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] 200 parts by weight of semi-coke particles with a particle diameter of 18mm, K 2 CO 3 1 part by weight, Ca(OH) 2 5 parts by weight are placed in a closed reactor for heating, and the pressure inside the reactor is controlled to be 4Mpa. When the closed reactor is heated to 800°C, start to feed CO 2 Gas, the gas flow rate is 10L / min per kg of semi-coke particles, and CO is fed at a temperature of 800-830°C 2 10 min, then stop CO 2 The gas input is stopped at the same time and the reactor is heated, the closed reactor is naturally cooled to room temperature, and finally the reaction product in the closed reactor is taken out, that is, the decolorizing agent 2 of the present invention.

Embodiment 2

[0026] 200 parts by weight of semi-coke particles with a particle diameter of 3mm, 3 parts by weight of sodium carbonate, Ca(OH) 2 3 parts by weight are placed in a closed reactor for heating, and the pressure inside the reactor is controlled to be 3Mpa. When the closed reactor is heated to 700°C, start to introduce CO 2 Gas, the gas flow rate is 8L / min per kg of semi-coke particles, and CO is fed at a temperature of 700-730°C 2 20 min, then stop CO 2 Gas input stops the reactor simultaneously and heats up, makes airtight reactor cool down to room temperature naturally, all adopts N during described heating up and cooling. 2 Gas protection, and finally take out the reaction product in the closed reactor, which is the decolorizing agent 2 of the present invention.

Embodiment 3

[0028] 200 parts by weight of semi-coke particles with a particle diameter of 13mm, K 2 CO 3 3 parts by weight are placed in a closed reactor for heating, and the pressure inside the reactor is controlled to 1Mpa. When the closed reactor is heated to 900°C, start to introduce CO 2 Gas, the gas flow rate is 5L / min per kg of semi-coke particles, and CO is fed at a temperature of 900-930°C 2 40 min, then stop CO 2 The gas input is stopped at the same time and the reactor is heated, the closed reactor is naturally cooled to room temperature, and finally the reaction product in the closed reactor is taken out, that is, the decolorizing agent 3 of the present invention.

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Abstract

The invention discloses a biochemical exterior drainage decoloring agent, solving the problems of expensive price, low decolorizing efficiency, easy generation of secondary pollution and complex production and operation process of the existing decoloring agent. The decoloring agent of the invention is prepared by the method comprising the following steps: putting 200 parts of semi-coke particles by weight and 1-3 parts of catalyst by weight into a closed reactor, wherein the catalyst is an alkali carbonate catalyst; raising the temperature of the closed reactor to 700-1100 DEG C, and then introducing CO2 gas into the closed reactor to carry out an activating reaction on raw materials in the presence of the catalyst to generate a semi-coke modifier; and cooling down to room temperature after gas introduction, and taking out the activation reactant semi-coke modifier, i.e. the decoloring agent. The decoloring agent of the invention has simple process, low cost of the raw materials, low production cost, good decoloring effect, no secondary pollution on the environment and extremely high resource utilization rate.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a biochemical external drainage decolorizing agent used in the field of metallurgy and environmental protection and a preparation method thereof. Background technique [0002] The decolorization of sewage treatment has always been one of the research hotspots in the field of environmental protection, especially the biochemical external drainage of the metallurgical industry, such as coking wastewater, has always been one of the difficulties in wastewater treatment in the metallurgical industry. With the continuous development of biochemical treatment processes for coking wastewater in recent years, COD, NH 3 -N and other pollutant indicators have reached the national first-level discharge standard, but the color of wastewater has always been one of the difficulties that plague the discharge and reuse of biochemical external drainage. According to the actual measurement, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F103/16
Inventor 刘尚超薛改凤段爱民朱书景张垒方宏辉张前香陈鹏项茹张雪红张楠
Owner 武钢集团有限公司
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