Power saving modification method for power plant oil-injected screw type air compressor station

Abstract

The invention belongs to the technical field of power saving modification of power plant air compressors, and specifically relates to a power saving modification method for a power plant oil-injected screw type air compressor station. To solve the problem that an existing power plant oil-injected screw type air compressor adopts gas products to conduct adsorbent regeneration, a combined type drying method adopting a post-refrigerant dryer and a no-heating or gentle-heating structure is modified to a gas product recycling and zero-release drying technology. The power saving modification method comprises the following steps that air consumption and a dew point of the before-modification air compressor station are measured firstly, and consumed energy charge of the before-modification air compressor station is calculated; then after a modification scheme is established, consumed energy charge of the air compressor station is calculated; and finally, after an energy saving analysis is conducted, air-consumption and an air supply dew point of a after-modification air compressor station are measured. According to the power saving modification method for the power plant oil-injected screw type air compressor station, gas product consumption of the air compressor can be reduced, electricity consumption in operation of the air compressor can be reduced, high-quality gas is provided for instrumentation valves, an ash handling system and miscellaneous gas systems, power plant shutdown production accidents caused by unstable running of the air compressor are reduced, the safety of the power plant and economic operation are ensured.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of energy-saving transformation of air compressors in power plants, and in particular relates to a method for energy-saving transformation of oil-injected screw air compressor stations in power plants. [0003] Background technique: [0004] 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 remov...

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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) Using a cold dryer and a heatless or slightly heated combined dryer, the quality of the air supply is not good, and the high dew point will cause the instrument Corrosion of valves and hardening of the ash removal system; (2) Compressed product gas is used to regenerate the desiccant, resulting in serious gas waste and further increasing the power consumption of the air compressor

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