Device and method for preparing ammonium bicarbonate by using carbon dioxide waste gas and nitrate wastewater

Abstract

The invention relates to a waste water and waste gas resource utilization technology, in particular to a device and a method for preparing ammonium bicarbonate by utilizing carbon dioxide waste gas and nitrate waste water. The device provided by the invention comprises a cobalt oxide / foamy copper cathode, a dimensionally stable anode, a carbon dioxide aerator pipe, a gas electronic flowmeter, a cathode chamber, an anode chamber, a direct-current power supply and a liquid adding and taking port. The highest yield of ammonium bicarbonate produced by the device is 34.2 mg cm <-2 > h <-1 >; according to the method provided by the invention, CO2 is introduced into the nitrate wastewater, the cobalt oxide / foamy copper cathode is promoted to electrochemically reduce nitrate to synthesize ammonia, and the ammonia production selectivity is 38.2% higher than that when CO2 is not introduced. According to the method, emission of CO2 in the waste gas is reduced, nitrate pollutants in the waste water are removed, the environment is protected, CO2 and ammonia nitrogen are stored as raw materials in the form of ammonium bicarbonate, subsequent synthesis of other economic products is facilitated, and resource utilization of the waste gas and the waste water is achieved.

Description

technical field

[0001] The invention relates to the technical field of resource utilization of waste water and waste gas, and more particularly, to a device and method for preparing ammonium bicarbonate by using carbon dioxide waste gas and nitrate waste water. Background technique

[0002] Because human production and life require a large amount of nitrogen-containing substances, a large amount of wastewater contains nitrate pollutants, such as nuclear industry wastewater, chemical wastewater, printing and dyeing wastewater, etc. Therefore, it is necessary to develop some efficient and stable technologies to remove nitrate pollutants in wastewater. Compared with traditional treatment methods, electrochemical reduction technology has the characteristics of simple operation, environmental friendliness, and low cost, and can convert nitrate into ammonia nitrogen, a product with economic value. However, the performance of the electrochemical nitrate reduction reaction is great...

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