Clean smoke gas fogging method and device of wet method smoke gas desulfuration system for thermal power plant

Abstract

The invention relates to a clean smoke gas fogging method of a heat-engine plant wet smoke gas desulfuration system. The method comprises the following steps of: regulating the temperature of a thermostatic water bath so as to ensure that the temperature of cooling water is maintained to be the same as the temperature of clean smoke gas of an absorption tower outlet of the desulfuration system; opening a peristaltic pump; inserting a smoke gas sampling gun into an axial line position in a chimney and opening an thermal insulating device on the smoke gas sampling gun; setting a sampling flow of a smoke gas sampler to be q; and leading clean smoke gas into an inner pipe of a condenser pipe so as to ensure that smoke gas is condensed in the condenser pipe and collected in a filter flask (3). A water inlet and a water outlet of the peristaltic pump (6) of a device for realizing the method are respectively communicated with water inlets of the thermostatic water bath (2) and the condenser pipe (4), and an outlet of the condenser pipe is communicated with the thermostatic water bath; a gas outlet end of the sampling gun (7) is communicated with the filter flask, and an upper port and a lower port of the filter flask are respectively communicated with the lower end of the inner pipe of the condenser pipe and the sampler (8); and the filter flask is placed in the thermostatic water bath and internally provided with a hygrometer (5). The method is used for analyzing and researching the contribution rate to corrosion of various erosion factors in condensation liquid to a concrete chimney and the corrosion characteristics.

Description

technical field [0001] The invention belongs to the technical field of industrial anti-corrosion, and in particular relates to a method and device for cleaning flue gas condensation in a wet flue gas desulfurization system of a thermal power plant. Background technique [0002] In the past two years, China has taken a series of measures to vigorously promote the construction of flue gas desulfurization projects in thermal power plants, and has achieved world-renowned achievements. The proportion of flue gas desulfurization units in coal-fired power units has risen from 2% at the end of 2000 to more than 50% at present. The rapid development of flue gas desulfurization in thermal power plants has made an important contribution to the control of China's total sulfur dioxide emissions. With the rapid development of flue gas desulfurization in thermal power plants, some problems have also appeared. [0003] In the construction of power plants in China, the single-pipe reinforc...

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Problems solved by technology

Because it is difficult to obtain the original condensate of flue gas at different condensation temperatures, the current research on condensation corrosion on the inner wall of the chimney is limited to the collection of chimney seepage for analysis and research

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