Can a blower be used as a circulator?
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Recently, the company plans to install a set of equipment in which normal-pressure nitrogen is used for heating during operation in order to activate the catalyst; the consumption of nitrogen is around 60 NM3/min. Therefore, nitrogen recycling is being considered for catalyst activation. I wonder if the blower can meet the requirements – what would be a recommended process?
I need you to provide the blower temperature, blower operating parameters, and operating pressure. Then everyone answered
My idea is to first pass the circulating nitrogen through an electric furnace to deactivate the catalyst, and then cool it with a cooler before returning it to the blower inlet； Therefore, the temperature of the nitrogen delivered by the blower is at room temperature, with a flow rate of 3000 NM3/h. The inlet pressure of the blower is at atmospheric pressure, while the outlet pressure is around 0.1–0.2 bar; this pressure is required mainly to overcome the resistance losses in the equipment and pipelines ； I hope everyone can provide suggestions on the process flow.
It mainly depends on the system pressure drop; if the wind pressure is too high, fans cannot be used, and compressors are required instead. 0.2 kilograms of air pressure should be no problem; use a Roots blower. However, heating and then cooling is too energy-intensive – it’s sufficient to use controlled heating that supplies only the heat needed. Last edited by thn_cn on 2008-1-8 22:31.]
If the catalyst is deactivated by heating with N2 and not cooled, the temperature of the N2 that is circulated back to the blower will continue to rise. For example, in one cycle it may go from 25°C to 80°C; in the second cycle, from 80°C to 130°C, until it reaches the temperature required for heating. In such a case, the blower would have to operate with nitrogen at a higher temperature – I’m not sure if this is feasible.
It should be possible depending on the required pressure and temperature
It’s not difficult to achieve control. I have a proposal here; take a look and see if it works: control the bed temperature, and when it reaches the set value, the nitrogen gas circulation circuit is activated while the heating circuit is turned off, and at the same time the heating system stops operating.
How to coordinate the nitrogen gas circulation loop with the existing nitrogen gas pipelines