Method for preparing NO2 gas oxidizing agent through metal nitrate pyrolysis

Abstract

The invention provides a method for preparing an NO2 gas oxidizing agent through metal nitrate pyrolysis. An air compressor (2) and a metal nitrate storage bin (1) are connected with a nitrate bin (3), the air compressor (2) conveys nitrate powder to the nitrate bin (3) by conveying air, the nitrate bin (3) is connected with a conveyor (5) through an air blocking valve (4), an outlet of the conveyor (5) is connected with the air blocking valve (4) on the lower side, the air blocking valve (4) is connected with an articulated chute (B), and the nitrate powder is conveyed into a tubular microwave pyrolyzer (6). The upper end of the discharging cover (C) of the tubular microwave pyrolyzer (6) is connected with a gas conveying pipe (A) and a spiral vacuum pump (7), O2 and NO2 are conveyed to an NO2 storage tank (8) for producing high-purity NO2 or nitric acid, the lower end of the discharging cover (C) is connected with the air blocking valve (4) and the conveyor (5), and metal oxide powder is conveyed to a metal oxide storage bin (9) for recycling.

Description

technical field [0001] The invention relates to metal nitrates, in particular to producing NO from metal nitrates 2 Methods. Background technique [0002] NO currently used in domestic industry 2 The gas is almost all produced by the ammonia oxidation method. This method requires high temperature, high pressure, complex process, and large investment in equipment. It is suitable for working conditions with large daily demand. In the actual industrial production process, enterprises will directly or indirectly produce metal nitrates; if small equipment is used, metal nitrates are used as raw materials to prepare NO 2 Gases are produced on a small scale in the laboratory, but cannot be produced on a large scale. The main reason is that the cost of equipment is extremely high and it is difficult to form industrialized production. For working conditions with a daily demand of less than 50,000 tons, it is basically unable to meet the needs. When the nitrate radical of metal n...

AI Technical Summary

Problems solved by technology

[0002] NO currently used in domestic industry 2 Gases are almost all produced by the ammonia oxidation method, which requires high temperature, high pressure, complicated process and large equipment investment, and is suitable for working conditions with large daily demand

In the actual industrial production process, enterprises will directly or indirectly produce metal nitrates; if small equipment is used, metal nitrates are used as raw materials to prepare NO 2 Gases are all produced in a small area in the laboratory, but cannot be produced on a large scale

Mainly because the cost of equipment is extremely high, it is difficult to form industrialized production

For working conditions with a daily demand of less than 50,000 tons, it is basically unable to meet the needs

Images