초록 ▼

A high efficiency system for removing moisture from compressed air and the like as used in pneumatic systems. To effectively achieve dew points of about -100 degrees F., the system utilizes two integrated dryer stages. The first stage causes the incoming air to be cooled to a dew point of about -35

A high efficiency system for removing moisture from compressed air and the like as used in pneumatic systems. To effectively achieve dew points of about -100 degrees F., the system utilizes two integrated dryer stages. The first stage causes the incoming air to be cooled to a dew point of about -35 to -40 degrees through the use of a refrigerant flowing in a heat exchanger to remove the heat of the air. Preferably for this cooling there is a precooler in the form of an air-to-air heat exchanger. The refrigerant is derived from a system having a compressor. The second stage of drying is achieved by passing the outlet air from the first stage, after removing moisture droplets and mist via a separator unit, into a heatless bed of desiccant or like material. Preferably, two beds are employed so as to permit one bed to be removing moisture while collected moisture is being removed (purged) from the other bed. This purging is achieved by using a small portion of the product air of the system that is heated by passing this air through a heat exchanger in the refrigerant system so as to use normally waste heat of the heated refrigerant to raise the temperature of the purge gas substantially to more effectively purge the moisture. This substantially reduces the amount of product air that is utilized for the purge; e.g., from about 15% to about 1-3%.

대표청구항 ▼

An improved drying system for removing moisture from air and like gases used in pneumatic systems to produce a product gas having a dew point of -40 to about -100 degrees Fehrenheit, which comprises: a heat exchange means having an inlet for receiving inlet gas from said pneumatic systems, and an ou

An improved drying system for removing moisture from air and like gases used in pneumatic systems to produce a product gas having a dew point of -40 to about -100 degrees Fehrenheit, which comprises: a heat exchange means having an inlet for receiving inlet gas from said pneumatic systems, and an outlet, for cooling said inlet gas to produce an outlet gas having a dew point of about 35 to 40 degrees F., said heat exchange means having a refrigerant flowing therein; a refrigerant system connected to said heat exchange means for supplying said refrigerant to said heat exchanger means, said refrigerant system having at least a compressor; a moisture separator means connected to said outlet of said heat exchanger means for removing condensed moisture contained in said cooled outlet gas; a moisture sorption means having at least one bed of moisture removal material, said sorption means having an inlet connected to said separator to receive gas having said condensed moisture removed, and an outlet for the removal of dried gas; and a purge system for selectively removing moisture from said bed of moisture removal material, said purge system including a withdrawl line to obtain a purge gas from said outlet of said moisture sorption means, a heat exchanger in said withdrawl line proximate said compressor said refrigerant system to heat said purge gas, and a means of selectively applying said purge gas from said heat exchanger to said bed for said selected removal of moisture from said bed.