An energy-saving integrated transformation method for an air compressor station in a power plant

Abstract

The invention belongs to the technical field of power plant air compressor energy-saving transformation and particularly relates to a novel power plant air compressor plant energy-saving integrated transformation method. The transformation method aims at the problems that the existing power plant air compressor frequently increases or decreases load to cause pressure fluctuation and an air compressor dryer adopts finished gas to carry out adsorbent regeneration, and after gas consumption calculation, a centrifugal compressor is adopted as base load, the original part of air compressors of the power plant carries out adjustment in an auxiliary manner, a low-voltage frequency-conversion air compressor realizes peak-clipping and valley-filling, and at the same time, the centrifugal compressor is equipped with a compression heat regeneration type dryer, and the original air compressors and the low-voltage frequency-conversion air compressor are equipped with a zero-emission finished gas recycling dryer. With adoption of the method, the finished gas consumption of the air compressor is reduced, the operational power consumption of the air compressor is reduced, gas with constant pressure is provided for a gauge valve, an ash disposal system and a mixed gas system, the production accident of power plant halt caused by unstable operation of the air compressor is reduced, and safe and economic operation of the power plant is convoyed.

Description

Technical field: [0001] The invention belongs to the technical field of energy-saving transformation of air compressors in power plants, and in particular relates to an energy-saving integrated transformation method for air compressor stations in power plants. Background technique: [0002] With the increasingly prominent environmental problems, the number of thermal power plants under construction has dropped sharply. In the future, my country's power energy will shift to new energy sources such as nuclear power, hydropower, wind power, and solar energy. The overall number of existing thermal power plants will remain unchanged. Due to the limited increase in the number of thermal power plants, all major power plants have carried out and further tapped the potential of energy-saving transformation of thermal power plants. In thermal power production process, compressed air is mainly used in the three major fields of thermal instrumentation, ash removal and transportation, an...

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Problems solved by technology

At the same time, when the tower is regenerated and cooled, the adsorbent in the product gas cooling tower is also extracted and discharged into the atmosphere. The utilization rate of the air compressor is low, and the precious product gas is still wasted when the tower is regenerated.

The following defects and deficiencies exist in the regeneration of the desiccant in the air compressor station of the existing power plant: (1) Frequent loading and unloading of the air compressor during normal operation, resulting in large fluctuations in the air supply pressure and instability of the air supply pressure; (2) using Screw machines and piston air compressors with low compression efficiency have low electrical conversion efficiency and large losses; 3) Compressed product gas is used to regenerate the desiccant during the regeneration cycle of the dryer, resulting in serious waste of gas, and further increase the air compressor. consumption

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