Device and method for sampling saturated wet flue gas condensation liquid after wet desulfurization

Abstract

The invention discloses a device and a method for sampling saturated wet flue gas condensation liquid after wet desulfurization. The sampling device comprises a flue, a cyclone separator, a condensation tank, a secondary air duct, an emptying pipe and a discharging pipe; the front end of the cyclone separator is connected with the flue through a connecting pipe; the front end of the secondary airduct is located in the cyclone separator, and the rear end of the secondary air duct extends into the condensation tank; the front end of the emptying pipe is connected with the secondary air duct, and the rear end of the emptying pipe extends out of the condensation tank; and the discharging pipe is connected with the secondary air duct through a sampling switch valve. The sampling method comprises the steps that flue gas enters the cyclone separator through the connecting pipe; the cyclone separator carries out cyclone treatment on the flue gas to remove liquid drops; and the flue gas entersthe condensation tank through the secondary air duct, the condensation tank condenses the flue gas and separates out the condensation liquid, and the condensation liquid is sampled through the discharging pipe. The problem that the saturated wet flue gas condensation liquid is difficult to sample is solved; the sampling process is simple and easy to operate; the device does not comprises any electric driving equipment, so that energy is saved; and the mixed liquid drops in the flue gas are removed before sampling, so that a more accurate sample solution is obtained.

Description

technical field [0001] The invention relates to the technical field of energy saving and environmental protection, in particular to a sampling device and method for saturated wet flue gas condensate after wet desulfurization. Background technique [0002] Wet desulfurization is a desulfurization process commonly used in my country, including limestone-gypsum method, ammonia method and seawater desulfurization. Limestone slurry, ammonia or seawater and other alkaline absorption liquids are used to spray and wash coal-fired flue gas in the desulfurization tower. SO in air 2 Absorbed by the absorption liquid to achieve the removal of SO 2 the goal of. After wet desulfurization, a large amount of water evaporates, and the flue gas forms saturated wet flue gas and is discharged through the chimney. [0003] At present, the national standard is only for SO in flue gas 2 , nitrogen oxides, dust, etc. put forward specific emission indicators, but studies have shown that there are...

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Problems solved by technology

[0005] In order to overcome the above-mentioned shortcomings existing in the prior art, the object of the present invention is to propose a simple and easy wet desulfurization saturated wet flue gas condensate sampling device and method to solve the problem of difficult sampling of saturated wet flue gas condensate; sampling device It only includes flue, cyclone separator, condensate tank, secondary air pipe, emptying pipe and discharge pipe, does not contain any electric drive equipment, does not need to be connected to a separate power supply, has a simple structure and saves energy; the flue gas enters The sampling device and the movement in the device completely rely on the positive pressure of the flue, which is convenient for on-site sampling; in the sampling method, the flue gas first passes through the cyclone separator, and the cyclone separator has the function of swirling to remove droplets, and the mixed gas in the flue gas Droplets are removed to ensure that the condensate sampling is not disturbed by mixed droplets; then the flue gas enters the condensation tank through the secondary air pipe to precipitate the condensate, and finally is discharged through the sampling valve. The whole sampling process is simple and easy to operate, and the flue gas is removed before sampling. Miscellaneous droplets, can get more accurate sample liquid

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