Dehumidification method and system for inlet of combustion gas turbine

Abstract

The invention provides a dehumidification method and system for an inlet of a combustion gas turbine. The dehumidification method comprises the steps that (1) a small amount of high-temperature high-pressure extraction air compressed by an air compressor is obtained; and (2) the high-temperature high-pressure extraction air obtained in the step (1) is delivered into an air filter and mixed with intake air, and through the high-temperature high-pressure extraction air, the air inlet temperature is increased, and the air inlet humidity is decreased. Since the air inlet temperature is increased and airflow disturbance is affected through the high-temperature extraction air, the relative humidity of an air inlet side is decreased, and the air inlet temperature is away from the dew point temperature by 3 DEG C or over. The dehumidification method and system can be used in rainy days and foggy days, and thus the problem that an intake air filter is affected with damp is solved; and the dehumidification method and system can also be used in frosty days, snowy days and extremely cold weather, and thus the problem that the intake air filter is frosted and frozen is solved.

Description

technical field [0001] The invention relates to the technical field of gas turbines, in particular to a simple circulation gas turbine inlet dehumidification method and system. Background technique [0002] A gas turbine is a rotary power machine that uses continuous flowing gas as a working medium to convert heat energy into mechanical work. In the main process of air and gas, only the gas turbine cycle composed of three major components: the compressor (Compressor), the combustor (Combustor) and the gas turbine (Turbine), is generally called a simple cycle. The quality and purity of its inlet air are the prerequisites for improving the performance and reliability of the unit, because the air contains more or less various inorganic and organic particulate impurities, which will cause erosion, fouling and corrosion in the flow part of the gas turbine; therefore , The air entering the gas turbine must be treated to filter out impurities to improve the air quality at the inle...

AI Technical Summary

Problems solved by technology

Its disadvantages are: 1) It is only for the deicing of the muffler. Although it realizes the operation safety of the unit, it cannot protect the pre-filter, and has no effect on the stable operation of the unit and filter consumables, and the economy is poor; 2) The system is complex, the transformation is difficult, and the investment is large, which requires the cooperation of equipment manufacturers. Most of the gas turbines are foreign equipment, and there are difficulties in design and communication; 3) The operation is not flexible, such as summer rainy days and spring and autumn foggy days, and the requirements for filter dehumidification cannot be taken into account

Disadvantages of the hood circulating air reuse method: the system is complex, the effect is poor, and there is pollution to the filter

The main disadvantages of this external heating system are: high energy consumption, uneconomical

A large amount of air passes through this auxiliary heating method to increase the temperature and achieve the purpose of preventing freezing, which consumes a lot of energy, high operating costs, and poor practicability

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