Recycling regeneration method and device for adsorbent for drying compressed air in power plant

Abstract

The invention relates to a recycling regeneration method and device for adsorbent for drying compressed air in a power plant. The device includes an air compressor, a precooler, a dust and oil removalfilter, an adsorption tower, a steam-water separator, a microwave generator, a PLC and an air storage tank. The method comprises the following steps: ambient air is sucked into the air compressor, hot compressed air discharged from the air compressor is initially cooled by the precooler, the cooled compressed air enters the dust and oil removal filter, when adsorption work is performed in an adsorption tower A, and after flow of the compressed air is uniformly divided through a perforated plate and a large amount of water is removed by the adsorbent, the dehydrated material is sent to the gasstorage tank under the condition that the dew point is qualified; at the time, the regeneration process of an adsorption tower B is started, the microwave generator is started, radiation heating is performed on the adsorption tower B, and a large amount of water molecules that are rapidly desorbed is heated, evaporated, and dried; at the same time, the dried and clean finished-product gas continuously flows into the adsorption tower B for purge regeneration, so that the regeneration process is completed; and the adsorption tower A and the adsorption tower B take turns to work to continuouslyprovide dried and clean compressed air.

Description

technical field [0001] The invention relates to the technical field of compressed air system drying, in particular to a method and device for recycling and regenerating adsorbents used in power plant compressed air drying. Background technique [0002] As an important air control system and the power source of pneumatic actuators, compressed air for power plant instruments is widely used in the production process of thermal power generation. High-quality compressed air is the key to ensure the reliable operation of pneumatic systems. Through the monitoring and investigation of the quality status of instrument compressed air in power plants, its humidity often does not meet the standard, which has become an important technical problem that plagues the safe production of power plants. At present, the main types of dryers used in China are refrigeration type and adsorption type. Among them, the refrigerated dryer reduces the temperature of the compressed air through refrigerat...

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Problems solved by technology

Because the air contains a certain amount of gaseous water, and is affected by factors such as seasons, geographical locations, and climatic conditions, the water content of the air source of the air compressor system is changing all the time. When the water content of the compressed air is large, the load of the dryer will vary The increase of the desiccant will cause the desiccant to easily reach adsorption saturation; and the more water the desiccant absorbs, the greater the regeneration energy required for the adsorbent; the operation and regeneration of the traditional adsorption dryer are not stable and reliable, which will easily lead to poor regeneration of the adsorbent. Thoroughly, therefore, the service life of the desiccant is very short, and its operation and maintenance and material costs increase

[0004] At present, the adsorbent in the dryer of the existing air compressor system in the power plant is mainly regenerated by conventional heating methods. Generally, hot clean compressed air is continuously fed into the adsorption tower to reversely purge the adsorbent surface, but there are Frequent regeneration times, long regeneration time, low thermal energy utilization rate, high adsorbent loss rate and low adsorption performance recovery rate; due to the relatively high price of the adsorbent, it is necessary to choose an economical, convenient and fast regeneration technology for The efficient use of adsorbent recycling is very important

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