Ammonia flowmeter

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1. How to calculate the actual gas volume in the ammonia decomposition purifier and decomposition furnace flowmeter? In the ammonia decomposition hydrogen purification equipment, liquid ammonia needs to be heated to 800-850 ℃ and decomposed under the action of nickel based catalyst to produce a mixed gas containing 75% hydrogen and 25% nitrogen for sale. Liquid ammonia first enters the vaporizer through the ammonia inlet valves F

1 and F2

(1). The vaporizer is equipped with an electric heating element to maintain the water temperature at 45-60 ℃ to achieve vaporization of liquid ammonia. The pressure of vaporized ammonia is generally controlled at 0.4-0.5MPa, and after being reduced to 0.05MPa, it is measured by a corrosion-resistant flow meter. These ammonia gases enter the heat exchanger and, through heat exchange, their temperature rises. The high-temperature mixed gas is cooled by the decomposition furnace, and the heated ammonia enters the decomposition furnace to decompose into a hydrogen nitrogen mixture. The decomposed high-temperature mixture enters the heat exchanger, is further cooled by the water cooler, and finally sent to the place of use. If the purity of the hydrogen nitrogen mixture needs to be improved, an FC type purification device can be used for processing. In the process flow of the device, two adsorption dryers work in parallel, with one running while the other can be regenerated to ensure continuous operation of the equipment. The dryer operates at room temperature and is heated to 350 ℃ for air flushing regeneration. The decomposed mixed gas enters a group of dryers through valve F14, utilizing the co adsorption of NH3 and H2O by molecular sieves, while adsorbing residual ammonia

and moisture. The gas is then sent from the pure gas outlet to the point of use through valve F12. Take some pure gas and pass it through valve F20 and regeneration flow meter, then send it to another set of dryers through valve F11 for heating, flushing and regeneration. After passing through valve F17, the regenerated exhaust gas is discharged through a gas water separator. Accurate readings of flow meters are crucial for ensuring equipment operational efficiency and gas purity during the ammonia decomposition and purification process. Flow meters are commonly used to monitor the flow of ammonia from vaporizers to the decomposition furnace, as well as the gas transport from the decomposition furnace to the point of use. The calculation of ammonia flow involves multiple factors, including pressure, temperature, and flow rate. During the ammonia decomposition process, the pressure is controlled at 0.4-0.5MPa, the temperature is controlled at 45-60 ℃, and the flow rate is adjusted according to equipment design and process requirements. By accurately controlling these parameters, the efficient process of ammonia decomposition can be ensured, while achieving the required purity of the hydrogen nitrogen mixture. To calculate the actual gas volume, it is necessary to consider the volume changes of the gas in different states. The ideal gas state equation PV=nRT can be used to calculate the volume of gas under different conditions. Among them, P represents pressure, V represents volume, n is the number of moles of gas, R is the ideal gas constant, and T is the absolute temperature. By substituting the actual gas state into the equation, accurate gas volume data can be obtained. The actual gas volume calculation of ammonia dec

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