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Method for treating high-concentration ammonia nitrogen in coal chemical wastewater

A high-concentration technology for coal chemical wastewater, applied in chemical instruments and methods, water/sewage treatment, degassed water/sewage treatment, etc., can solve problems such as secondary pollution of the atmosphere, achieve strong pertinence, enhance force, The effect of avoiding secondary pollution

Inactive Publication Date: 2012-08-15
CHANGZHOU YAHUAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem existing in the prior art: organic compound denitrification agent in combination with stripping method causes secondary pollution to the atmosphere due to the discharge of ammonia gas when processing high-concentration ammonia-nitrogen wastewater, the processing method of the present invention is realized in this way:

Method used

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Examples

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Effect test

example 1

[0038] First, take an appropriate amount of limonite particles that have been crushed and sieved through 100 meshes, soak them in concentrated hydrochloric acid, saturated potassium hydroxide and methanol solution in turn, then separate and precipitate them under an external magnetic field, and then treat the above precipitates with oxymalononitrile Carry out polarization treatment, and immerse in the organic composite denitrification agent that is made up of 45 g acrylate, 30 g dihydroxyviolanthrone, 25 g 1-methylcyclopentanol, stir, precipitate, and then deionize the precipitate After washing with water for three times, it is dried under the protection of nitrogen, and finally the dried nanomaterials are added to the wastewater containing high concentration of ammonia nitrogen at a mass ratio of 55ppm, stirred, and then separated under an external magnetic field. After using this method to treat wastewater from a pharmaceutical company in Changzhou, the concentration of ammon...

example 2

[0040] First, take an appropriate amount of limonite particles that have been crushed and sieved with 120 meshes, soaked in concentrated hydrochloric acid, saturated potassium hydroxide and methanol solution in turn, then separated and precipitated under an external magnetic field, and then treated the above precipitate with oxymalononitrile Carry out polarization treatment, and immerse in the organic composite denitrification agent that is made up of 35g2-oxocyclopentanecarboxylate, 30g cycloheptanone and 35g iohexol and stir, precipitate, then this precipitate is deionized After washing with water for three times, it is dried under the protection of nitrogen. Finally, the dried nanomaterials are added to the wastewater containing high concentration of ammonia nitrogen at a mass ratio of 95ppm, stirred, and then separated under an external magnetic field. After using this method to treat the wastewater of a pharmaceutical factory in Wuxi, the concentration of ammonia nitrogen ...

example 3

[0042] First, take an appropriate amount of limonite particles that have been crushed and sieved with 110 meshes, soaked in concentrated hydrochloric acid, saturated potassium hydroxide and methanol solution in turn, then separated and precipitated under an external magnetic field, and then treated the above precipitate with oxymalononitrile Carry out polarization treatment, and immerse in the organic compound denitrification agent that is made up of 40g acrylate, 25g polyvinylpyrrolidone and 35g dexpanthenol to stir, precipitate, then wash this precipitate with deionized water three times and protect it under nitrogen Drying is carried out under the environment, and finally the dried nanomaterials are added to the wastewater containing high concentration of ammonia nitrogen according to the mass ratio of 87ppm, stirred, and then separated under an external magnetic field. After using this method to treat wastewater from a pharmaceutical factory in Shanghai, the concentration o...

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Abstract

The invention discloses a method for treating high-concentration ammonia nitrogen in coal chemical wastewater. The method is characterized by comprising the following steps: soaking ground and screened limonite particles in concentrated hydrochloric acid, a saturated potassium hydroxide solution and a methanol solution in sequence, separating and precipitating the particles in an applied magnetic field, then polarizing the precipitates with oxymalononitrile, immersing the polarized materials into an organic compound denitrfying agent formed by acrylic ester, dihydroxylviolanthrone, chloroacetophenone, dexpanthenol and the like for 30-50 minutes, washing the materials three times with deionized water and drying the materials in the presence of nitrogen, thus obtaining the magnetic nano adsorbing materials modified by the organic compound denitrfying agent. Under the condition that the original ammonia nitrogen removal rate is maintained, the problem of secondary pollution caused by emission of ammonia in the organic compound denitrfying agent stripping process is solved by adopting the magnetic nano adsorbing materials on the basis of treating the wastewater with high-concentration ammonia nitrogen with the organic compound denitrfying agent.

Description

technical field [0001] The invention relates to a method for treating high-concentration ammonia nitrogen, in particular to a method for treating high-concentration ammonia nitrogen in coal chemical industry wastewater, belonging to the field of sewage treatment. Background technique [0002] Coal chemical industry wastewater is mainly high-concentration coal washing wastewater, which contains a large amount of toxic and harmful substances such as phenol, cyanide, oil, and ammonia nitrogen. 4 + ) and free ammonia (NH 3 ) exists in a state of balance. It has the characteristics of large amount of discharge, wide range of pollution, complex discharge methods, various types of pollutants, strong toxicity of pollutants, and difficulty in recovery of pollutants after discharge. [0003] At present, there are many methods for treating coal chemical wastewater containing high concentration of ammonia nitrogen. For example, the traditional precipitation method can remove ammonia ...

Claims

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Application Information

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IPC IPC(8): C02F1/58C02F1/20
Inventor 雷春生雷思宇虞静
Owner CHANGZHOU YAHUAN ENVIRONMENTAL PROTECTION TECH
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