Control method and device for heat-adsorption-free air drier

Abstract

Disclosed is a control method and device for a heat-adsorption-free air drier. A programmable logic controller (PLC) is used as a control center, a dew point temperature and pressure dew point transducer is arranged at an air outlet end, the dew point temperature of the air outlet end and a pressure dew point of an air outlet are monitored through the dew point temperature and pressure dew point transducer, meanwhile, a temperature transducer is arranged at the position of an air inlet, the temperature transducer of the air inlet is monitored, a pressure transducer is mounted at the position of an air control combined valve silencer to collect abnormal pressure signals, data values obtained by all transducers are fed back to the PLC, and the PLC controls the operation of the heat-adsorption-free drier according to collected data information of all transducers.

Description

technical field [0001] The present invention relates to a method and device for controlling the humid air drying of the locomotive air compressor, in particular to a method and device for controlling the drying of the locomotive air compressor without heat adsorption; Dry processing. Background technique [0002] The basic working principle of the heatless adsorption air dryer is the "pressure swing adsorption" method. When the compressed air containing water passes through the adsorption bed at high pressure, the adsorbent absorbs moisture, and at low pressure, the moisture in the adsorbent is "desorbed" and reused. Returning to the gas phase, the sorbent is thus "regenerated" by dehydration. The air for regeneration and desorption comes from a part of the dry gas output by the machine. The main body of the currently used heatless adsorption air dryer is composed of two adsorption towers, inlet valve, exhaust valve, sewage valve, outlet check valve, electric controller, e...

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Problems solved by technology

[0011] The purpose of the present invention is to aim at the existing heatless adsorption drying control method and device of the locomotive air compressor, which cannot reflect the quality index of the finished gas of the dryer, and there is no detection and automatic switching function for the long-term failure of the dryer. The adsorption and regeneration time of the controller cannot be adjusted, and the dryer controller has no control function for the inlet temperature. A quality index that can accurately reflect the quality of the dryer's finished gas is proposed, and it can detect and automatically switch over long-term failures in the dryer. Function, the adsorption and regeneration time of the dryer controller can be adjusted, and the dryer controller can control the inlet temperature. The heatless adsorption drying control method and device

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