Nitrogen oxide separation device that can realize automatic online cleaning

Abstract

The invention relates to a nitrogen oxide separating device capable of being automatically and online washed. The nitrogen oxide separating device comprises a separating device body and a spraying washing mechanism. The spraying washing mechanism is composed of an upper-separating-element top spraying opening, an upper-separating-element bottom spraying opening, lower-separating-element spraying openings, an upper-separating-element pressure difference control unit, a lower-separating-element pressure difference control unit, an upper-separating-element top spraying control unit, an instrument air conveyer, a spraying liquid conveyer, a plurality of electromagnetic switching valves and a plurality of stop valves. The output end of the instrument air conveyer and the output end of the spraying liquid conveyer are communicated with the air input ends and the liquid input ends of the electromagnetic switching valves respectively, and the output ends of the electromagnetic switching valves are connected to the input ends of the lower-separating-element spraying openings and the input end of the upper-separating-element top spraying opening. By means of the nitrogen oxide separating device, automatic online spraying washing of the nitrogen oxide separating device is achieved, the spraying washing mechanism can be accurately started in time, washing efficiency is high, safe and reliable running of the nitrogen oxide separating device can be effectively guaranteed, and the site management level of an enterprise is improved.

Description

technical field [0001] The invention belongs to the technical field of control devices for nitric acid production technology, and relates to a nitrogen oxide separation device that is suitable for nitric acid production equipment and can realize automatic online cleaning. Background technique [0002] In the nitric acid production process system, the nitrogen oxide separation device is located at the front end of the nitrogen oxide compressor to remove impurities and mist in the process gas, so as to ensure the stable operation of the compressor. However, after a certain period of production and operation of the system, nitrogen oxides, water, ammonia, etc. will form ammonium salt crystals, which will adhere to the surface of the internal parts of the nitrogen oxide separation device, causing an increase in pressure difference, resulting in a decrease in the separation efficiency of the separation device, and the crystals may also It will adhere to the compressor rotor, dest...

AI Technical Summary

Problems solved by technology

At present, the automation degree of the nitrogen oxide separation device configured in the double-pressurized nitric acid production system in this field is generally low, especially in the cleaning of the separation device. So far, the production is basically manual operation, which cannot be accurate. , stable control, and the labor intensity of on-site operation is also very large

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