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Method for treating ammonium chloride wastewater

A technology for ammonium chloride and waste water, applied in chemical instruments and methods, multi-stage water/sewage treatment, calcium/strontium/barium chloride, etc., can solve the problems of low treatment efficiency and the utilization rate of other polluting by-products, Reach the effect of saving the cost of wastewater treatment

Inactive Publication Date: 2016-03-09
INNER MONGOLIA SHENGYILUN RARE EARTH MATERIAL CO LTD
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Problems solved by technology

The existing methods have the disadvantages of low treatment efficiency, easy to cause other pollution, and low utilization rate of by-products after deamination

Method used

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  • Method for treating ammonium chloride wastewater
  • Method for treating ammonium chloride wastewater
  • Method for treating ammonium chloride wastewater

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Embodiment 1

[0026] A method for treating ammonium chloride waste water, the concrete steps are as follows:

[0027] Step 1, adding lime and ammonium chloride to the ammonium chloride wastewater, and causticizing the ammonium chloride wastewater to obtain a causticizing solution, ensuring that the pH of the causticizing solution is 11.5-12.0;

[0028] Step 2, carrying out plate and frame filter press filter to the causticizing liquid obtained in step 1, so that the causticizing liquid filtrate does not contain solid residue;

[0029] Step 3, the causticizing liquid filtered in step 2 enters the stripping and rectifying tower 2 from the top of the stripping and rectifying tower 2, the direction is from top to bottom, and the steam enters from the bottom of the stripping and rectifying tower 2, and the steam is adjusted by adjusting the stripping and rectifying tower. The temperature and pressure in the rectification tower 2 make the ammonia water be separated from the causticizing liquid, a...

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Abstract

The invention relates to a method for treating ammonium chloride wastewater, and belongs to the field of wastewater treatment. The method comprises the steps that firstly, lime causticization ammonia-nitrogen wastewater is adopted for converting ammonia ions into ammonia molecules, filtering is performed through a sheet frame, a causticization solution enters a steam stripping distilled ammonia rectifying tower to control pressure, steam inlet and the temperature inside the tower, ammonium hydroxide is constantly rectified, the concentration is improved, the ammonia nitrogen content in deaminized calcium chloride wastewater is controlled under 15 mg / l to reach the standard completely, gas is not condensed, the ammonia gas absorption tower is adopted for absorbing, recycling and retreatment, and air emission reaches the standard completely.

Description

technical field [0001] The invention relates to a method for treating ammonium chloride wastewater, which belongs to the field of wastewater treatment. Background technique [0002] At present, my country's ammonium chloride-containing industrial wastewater has seriously polluted the environment, including inorganic chemical industry, organic chemical industry, rare earth element factory, etc., and industrial wastewater treatment is a big problem. [0003] Ammonium chloride aqueous solution is weakly acidic, and the acidity increases when heated. It is corrosive to ferrous metals and other metals, especially to copper, and has no corrosive effect on pig iron. Due to the presence of ammonia nitrogen and chloride ions in ammonium chloride wastewater, if the ammonium chloride wastewater is discharged directly, it will cause certain pollution to the water body, and with the continuous increase of the amount, the degree of pollution is also increasing. [0004] The existing tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01F11/24C01C1/02C02F101/16
Inventor 汤闳钦王万勇肖武松
Owner INNER MONGOLIA SHENGYILUN RARE EARTH MATERIAL CO LTD
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