Method for testing content of combustible materials in limestone wet desulphurization slurry solid

Abstract

The invention discloses a method for testing the content of combustible materials in limestone wet desulphurization slurry solids, and the method comprises the following steps: removing unreacted calcium carbonate and calcium sulfite in absorption tower slurry to obtain treated absorption tower slurry; filtering the treated absorption tower slurry based on medium-speed quantitative filter paper to obtain residual solids in the treated absorption tower slurry; putting the residual solid into a drying oven, and conducting drying to constant weight; carrying out analysis treatment on the content of crystal water in the residual solid which is dried to constant weight, so as to obtain the mass content percentage of the crystal water in the residual solid; putting the residual solid dried to the constant weight in a porcelain crucible, and conducting firing to a constant weight; and calculating the combustible content to obtain a calculation result. According to the embodiment of the invention, the combustible content in the limestone wet desulphurization slurry solid can be rapidly measured, and the measurement result is high in accuracy.

Description

technical field [0001] The invention relates to the technical field of limestone wet desulfurization, in particular to a method for testing the content of combustibles in limestone wet desulfurization slurry solids. Background technique [0002] During the operation of the limestone-gypsum wet flue gas desulfurization system, foaming and overflow of the absorption tower slurry has become a common phenomenon, which seriously affects the stable operation of the desulfurization system. The research results show that one of the reasons for the foaming and overflow of the slurry in the absorption tower is that the slurry solid contains more lipophilic and hydrophobic carbon and oil particles with a lower density than the slurry. These carbon and oil particles come from the unburned coal (mainly carbon particles) and fuel oil in the boiler. The research results also show that when the content of carbon and oil particles in the slurry solids is greater than 0.5%, there is a high p...

AI Technical Summary

Problems solved by technology

Because unreacted calcium carbonate, calcium sulfite, and crystal water in calcium sulfate in the slurry solid also decompose at 850°C, therefore, only measuring the loss on ignition in the slurry solid at 850°C cannot truly reflect the flammability in the slurry solid. substance content

[0003] Currently there is no analytical method for combustible content in solids in limestone-gypsum wet flue gas desulfurization system slurry in thermal power plants

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