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Method and equipment for carrying out deamination treatment on high-concentration wastewater containing ammonia nitrogen

A technology for ammonia nitrogen wastewater and its treatment method, which is applied in metallurgical wastewater treatment, degassed water/sewage treatment, neutralized water/sewage treatment, etc. It can solve the problems that ammonia stripping efficiency is difficult to meet the requirements and the removal rate is high, reaching Effects of protecting the surrounding environment, improving efficiency and stability, and reducing operating costs

Inactive Publication Date: 2010-03-10
CHANGCHUN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ammonia nitrogen stripping method has the advantages of small investment cost, low operating cost, simple process, stable treatment effect, easy management and maintenance, etc. However, in the smelting industry, in order to reduce the difficulty of removing ammonia and heavy metals, the wastewater after treatment can reach the enterprise reuse standard For reuse, the removal rate of high-concentration ammonia-nitrogen-containing wastewater is high, and the wastewater is high-concentration ammonia-nitrogen-containing wastewater in the non-ferrous metal smelting industry. The main components of the wastewater are ammonia, ammonium ions, sulfate ions and sodium ions. , the ammonia nitrogen concentration reaches above 2.5g / L, the ammonia stripping efficiency of the conventional stripping method is difficult to meet the requirements

Method used

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  • Method and equipment for carrying out deamination treatment on high-concentration wastewater containing ammonia nitrogen
  • Method and equipment for carrying out deamination treatment on high-concentration wastewater containing ammonia nitrogen
  • Method and equipment for carrying out deamination treatment on high-concentration wastewater containing ammonia nitrogen

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example 1

[0025] Example 1. Wastewater enters the regulating tank for water quality and water volume balance. The wastewater enters the sedimentation equipment. The wastewater is lifted to the flocculation sedimentation tank by the lift pump to add flocculant for flocculation and sedimentation. The mixing time of flocculant and wastewater is 3 minutes, and the reaction time is 30 minutes. , the precipitated wastewater is then lifted to the first-level stripping tower by the lifting pump, and the wastewater in the first-level stripping tower moves from top to bottom in the form of spraying, and is blown off by steam with a pressure of 0.5MPa, and the second-level ammonia blowing is carried out. For stripping, first use milk of lime to adjust the pH value of the wastewater to 11, after mixing, reaction, and chemical precipitation, after precipitation and separation, the wastewater is lifted to the stripping tower by a lift pump again, and steam stripping with a pressure of 0.4MPa is used in...

example 2

[0029]Example 2, the ammonia stripping absorption tower of the device of the present invention consists of stripping tower 1, absorption tower 2, waste water sprayer 3, waste water packing layer 4, aeration pipe 5, drainage box 6, exhaust pipe 7, clear water spray 8, clear water packing layer 9 and recovery pipe 10, wherein waste water sprayer 3, waste water packing layer 4 and aeration pipe 5 are housed in stripping tower 1, waste water packing layer 4 is in the middle part of stripping tower 1, waste water spraying The device 3 is above the waste water packing layer 4, the aeration pipe 5 is below the waste water packing layer 4, the drainage tank 6 is at the bottom of the stripping tower 1, the top of the stripping tower 1 is connected with an exhaust pipe 7, and the upper part of the absorption tower 2 inner cavity is installed There is a clear water sprayer 8 with a clear water packing layer 9 in the middle, the other end of the exhaust pipe 7 is connected to the absorptio...

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Abstract

The invention relates to a method and equipment for carrying out deamination treatment on high-concentration wastewater containing ammonia nitrogen, relating to industrial wastewater treatment. The method comprises the steps of preprocessing, three-level ammonia stripping, ammonia recycling, and the like, and limemilk is added in wastewater and the pH value is adjusted before two-level ammonia stripping and three-level ammonia stripping. The equipment mainly comprises a stripping tower and an absorption tower. By adopting a three-level ammonia stripping and absorbing process, the removing ratio of ammonia reaches over 98 percent, the efficiency and the stability for removing ammonia nitrogen are improved, the running cost of enterprises is reduced, the secondary pollution is prevented andthe periphery environment is protected.

Description

technical field [0001] The invention relates to a method for treating industrial wastewater, in particular to a method for treating high-concentration ammonia-nitrogen-containing wastewater in the nonferrous metal smelting industry, and the invention also relates to equipment for treating ammonia-nitrogen-containing wastewater. Background technique [0002] High-concentration ammonia-containing wastewater directly discharged into water bodies not only pollutes water quality and the environment, but also has toxic effects on surrounding people and organisms. For example, when ammonia nitrogen in drinking water exceeds the standard, ammonia nitrogen is decomposed into nitrite nitrogen by microorganisms, and nitrite nitrogen combines with protein to form nitrosamine, which is a carcinogen, and drinking this water for a long time is extremely harmful to the body; or When the concentration of ammonia nitrogen in the water increases, it will cause eutrophication of the water body,...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/66C02F1/52C02F1/56C02F1/20C02F103/16C01C1/02
Inventor 边德军任庆凯田曦霍明昕谢忠岩李广柱
Owner CHANGCHUN INST OF TECH
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