Zero gas consumption low dew-point waste heat regenerative absorbent type dryer

Abstract

The invention relates to a zero gas consumption low dew-point waste heat regenerative absorbent type dryer. The dryer comprises a left adsorption tower, a right adsorption tower, a water cooler, a gas-liquid separator, a plurality of valves, a pressurizer and an electric heater. The dryer uses the heat of compression of an air compressor to desorb the adsorbing agent initially; then about 4% of the finished dry air is compressed by the pressurizer and heated by the electric heater for adsorbing the adsorbing agent at a high temperature; and finally the electric heater is closed, and the finished dry air is compressed by the pressurizer to air-cool the adsorbing agent. By using the dryer of the invention, the desorption and air-cooling stages can be performed under pressure, thus effectively prolonging the life of the adsorbing agent, extremely saving energy and reducing consumption and realizing lower dew-point, the outlet dew-point is less than -70 DEG C; and the 4% of the finished air used for electric heating desorption and air-cooling is fully recycled, and no gas is discharged in the desorption and air-cooling stages.

Description

technical field [0001] The invention relates to a dryer, in particular to a zero-gas-consumption, low-dew-point waste heat regeneration adsorption dryer. Background technique [0002] At present, there are mainly two types of dryers with zero gas consumption in compressed air purification equipment. One is the blast heating regenerative internal circulation dryer. Due to the design of the blower, this kind of equipment requires a large power consumption, and the use cost and manufacturing cost are high. The other is the waste heat (compressed air heat, waste steam heat) regenerative dryer. These devices need to use two coolers, use an air compressor to compress the thermal desorption adsorbent, and use the cooled unsaturated cold air to blow the cold adsorption Although these devices consume less power, it is difficult to achieve a lower dew point. The outlet dew point is -40°C, so it is only suitable for places with low dew point requirements. Contents of the invention ...

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Problems solved by technology

[0003] In view of the shortcomings of the existing zero-gas consumption dryers, which have large power consumption and high dew point, the applicant has made research and improvements to provide a zero-gas consumption, low dew point waste heat regenerative adsorption dryer, which can not only reduce power consumption to the greatest extent , also achieves a low dew point without any gas emissions during the desorption and blow-cooling phases

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