Keywords: Ammonia Decomposition Rate Measurement Method, Ammonia Decomposition Rate Measurement, Ammonia Decomposition Rate Measurement Principle, Ammonia Decomposition, Measurement, Ammonia, Nitrogen Potential, Hydrogen, Nitrogen, Nitriding, Furnace Tank, Pressure Gauge, Ammonia Decomposition Measurement, Thermal Treatment, Ammonia Decomposition Measurement Gauge,

Method and principle of determination of ammonia decomposition rate

　　The flow and pressure of ammonia can be adjusted by needle valve. The pressure in the tank is measured by a U-shaped manometer, which is generally controlled at 30~50mm oil column. The bubble bottle contains water to observe the flow condition of the ammonia system. In the nitriding process control technology, the nitriding atmosphere “nitrogen potential” can be defined as PNH3 PH2, visible ammonia decomposition rate is lower (the more nitrogen through), the higher the nitrogen potential, the production is usually through the adjustment of ammonia decomposition rate to control the nitriding process.

　　The ammonia decomposition meter utilizes the property that ammonia is soluble in water and its decomposition products are insoluble in water. When in use, first close the water inlet valve and the exhaust gas in the furnace tank into the glass container marked with a scale, and then close the exhaust, drain valve and air inlet valve, open the water inlet valve, filled with exhaust gas to the glass container filled with water. As ammonia is dissolved in water, the volume occupied by water represents the volume of undecomposed ammonia, and the remaining volume is occupied by the decomposition products, and the ammonia decomposition rate can be read directly from the scale.

Ammonia Decomposition Tester 

1、Water container 2、Water inlet valve 3、Air inlet valve 4、Drainage valve、Exhaust valve

　　In recent years, with the development of technology, the measuring instrument to feedback the ammonia decomposition rate by electric signal has been put into production application, which makes it possible to control the nitrogen permeation process by microcomputer. This ammonia decomposition rate measurement instrument can be divided into two categories, one is the use of hydrogen, nitrogen and ammonia thermal conductivity differences in the determination of ammonia decomposition rate; the other is based on the selection of multi-atomic gas absorption of radiation, infrared measurement of the furnace gas composition, so as to determine the rate of ammonia decomposition.

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