Atomization flash-evaporation ammonia-removing process for ammonia and nitrogen-containing wastewater

A technology of flash evaporation of ammonia nitrogen wastewater, applied in the field of ammonia removal, can solve the problems of large investment in packed towers, and achieve the effects of simple equipment structure, low operating cost and large adaptability

Inactive Publication Date: 2006-12-27
重庆工学院
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Problems solved by technology

The ammonia nitrogen removal effect of this process is greatly affected by operating conditions, such as gas-liquid ratio and other factors, and the investment of the packed tower is also large

Method used

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  • Atomization flash-evaporation ammonia-removing process for ammonia and nitrogen-containing wastewater

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Embodiment Construction

[0011] use figure 1 The treatment equipment shown adjusts the pH value of coking wastewater with a volume of 1 liter and an ammonia nitrogen concentration of 887.5mg / L to 12.08, so that the ammonia nitrogen in the wastewater is mainly converted into NH 3 form, and then at an ambient temperature of 25°C, the coking waste water is pumped 1 to transport the waste water in the high-level storage tank 2 to a spray tower 3 with a space volume of 25 liters at the top of the tower at a flow rate of 170 ml / min. In the device 3-1, highly atomized water mist or mist is formed, and the vacuum degree in the atomization tower is kept at about 0.005MPa through the connection between the tower top pipe and the vacuum pump 4 or the fan phase. In the tower under negative pressure, water mist or mist droplets move from top to bottom while ammonia nitrogen flashing occurs in the wastewater, and fall to the bottom of the tower, and then flow into the high storage tank 2, and the evaporated NH 3 I...

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Abstract

The invention discloses an atomizing flashing deaminasing method with ammonia nitrogen waste water, which comprises the following steps: adjusting pH value of ammonia nitrogen waste water over 11; transmitting waste water to the atomizer on the top of atomizing tower; forming drip or fog drip; connecting atomizing tower and vacuum pump or fan through pipe; flashing ammonia and nitrogen in the negative pressure environment; extracting the flashed material; moving non-evaporated water from upwards to downwards; falling to bottom of atomizing tower to reserving groove; repeating those courses until reaching technological need.

Description

technical field [0001] The invention belongs to the technical field of environmental chemical engineering, and in particular relates to a deammonization method. Background technique [0002] At present, high-concentration ammonia nitrogen wastewater has a wide range of sources, involves many industries, and has a large amount of discharge. For example, chemical fertilizers, metallurgy, coking, petrochemicals, pharmaceuticals, fine chemicals, food, landfills, etc. will produce a large amount of ammonia nitrogen wastewater. The direct discharge of these large amounts of ammonia nitrogen wastewater into the water body will not only cause eutrophication of the water body, pollute the water quality, but also cause poisonous effects on people and organisms. Therefore, the impact of ammonia nitrogen wastewater on environmental pollution has attracted great attention from people from all walks of life. [0003] Ammonia nitrogen wastewater treatment curr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/20C02F1/12
Inventor 全学军赵天涛张丽杰
Owner 重庆工学院
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