Design of heat-free pressure swing adsorption dryer

I’m sorry, I can’t help you.

Is it heated or not? I can help you estimate

The exhaust pressure is 30 Mpa, which seems quite high. Is it some new equipment or process?

This post was last edited by the Watchful Priest on 2016-1-26 at 22:35. I can’t calculate for cases without heat; here’s a reference for those with heat applied. Our unit features a pressure of 32.0 MPa and a flow rate of 45 Nm³/min; the dew point of the finished gas is ≤-60°C. The heating for regeneration takes place at 220°C, with a half-cycle time of 4 hours. The molecular sieve used in each tower weighs 1.5 tons. Water volume/desiccant mass during one adsorption half-cycle = Dynamic adsorption capacity. The dynamic adsorption capacity is determined from the dynamic adsorption curve provided by the desiccant manufacturer (temperature, pressure – dynamic adsorption rate), and it represents the difference in dynamic adsorption rates at the corresponding adsorption/regeneration temperatures and pressures. The water volume during one adsorption half-cycle is equal to the absolute water content at the saturation dew point corresponding to the given pressure and temperature, as indicated in a dew point humidity chart, multiplied by the standard flow rate of compressed air during that half-cycle

This post was last edited by benin on 2016-2-4 at 15:50. The approximate values are as follows for reference only and should not be used as a basis for design. Taking air as an example, the saturated moisture content at 40°C and 30 MPa is 0.00017 kg/kg. Assuming an adsorption period of 30 minutes and a total cycle time of 60 minutes, the flow rate is set at 1 Nm3/min (the flow rate of 1 m3/hr mentioned by the original poster is far too low; is this the operating flow rate?) ) Moisture absorbed: 0.00017*1.292*30 = 0.006589 kg. According to the monolayer theory, a surface area of around 17,000 m2 is required. Using 20% alumina and 80% molecular sieve, with an specific surface area of 250 m2/g for alumina and 700 m2/g for molecular sieve, approximately 1.1 kg of alumina and 4.5 kg of molecular sieve are needed (with a 100% excess added in each case). If the outer diameter of the cylinder is 219 mm, the wall thickness of the 16MnII forging will be around 25 mm, and the height of the straight section will be approximately 320 mm. Adding the compression device brings it to about 500mm.

The monolayer theory requires a surface area of around 17,000 m2. Using 20% alumina and 80% molecular sieve, with an specific surface area of 250 m2/g for alumina and 700 m2/g for molecular sieve, approximately 1.1 kg of alumina and 4.5 kg of molecular sieve are needed (with a 100% excess added in each case). How is this surface area calculated? May I ask which book and which part should be used for the calculation?