Control method of heat-absorption-free regenerative type compressed air dryer

Abstract

The invention discloses a control method of a heat-absorption-free regenerative type compressed air dryer. The method is realized by adopting a double-tower dryer. A main control magnetic valve provides a reliable periodic signal, so that the dryer has different working modes such as working regenerating, pressure equalizing and water draining, and has a timing memory function of uninterrupted working. Compared with the conventional method, the control method has advantages of being relatively beneficial to stabilization of the quality of output air, and prolonging the service life of a drying agent and the service life of a mechanical part of the dryer. A control timing sequence is realized by a hardware timing circuit; and according to the control method, the cost is low, the power consumption is low, the reliability is high, the electromagnetic interference is strong and the like.

Description

technical field [0001] The invention relates to a control method of a drier, in particular to a control method of a heatless adsorption regenerative compressed air drier. Background technique [0002] At present, the heatless adsorption regenerative compressed air dryer often adopts a double-tower structure, and through the alternating cycle of drying and regeneration of the two towers, it can continuously provide clean and dry compressed air for the locomotive. [0003] Conventional double-tower dryers such as figure 1 As shown, it mainly includes a drying tower 7, a controller 6 and a piping system 4. Wherein, the drying tower 7 is composed of a water removal filter 1 , an oil removal filter 2 , a drying device 3 and a dust removal filter 5 . [0004] This double-tower dryer control method is widely used, but there are some shortcomings: [0005] 1) When the dryer works on locomotives and other occasions, it often needs to be started more frequently. If it starts to dry...

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Problems solved by technology

[0008] The purpose of the present invention is to address the deficiencies in the prior art and provide a control system that can effectively solve the problem of different lifespans of desiccant in two sets of drying towers caused by drying from a fixed set of drying towers every time the dryer is started. method, and an integrated double-tower dryer control method that avoids the increase in the work load of the adsorbent due to the volatilization of liquid stored water in the drying tower into the adsorbent of the drying device

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