Fluorine-lined pipe flue gas heating system

Abstract

The invention discloses a fluorine-lined pipe flue gas heating system. The fluorine-lined pipe flue gas heating system involves a pressure reducer, a heat exchanger and a chimney, wherein the heat exchanger comprises a shell, and a gas inlet and a drainage opening are formed in the upper end and the lower end of the shell respectively; pipe plates are arranged at the upper end and the lower end inthe shell correspondingly, a heat exchange chamber is formed between the two pipe plates, a plurality of heat exchange pipes are arranged between the two pipe plates in an inserted mode, and a flue gas inlet pipe and a flue gas outlet pipe communicating with the heat exchange chamber are arranged on the side wall of the shell; and the heat exchange pipes, the shell and the pipe plates are made ofcarbon steel, the outer walls of the heat exchange pipes, the inner wall of the shell and the two side walls of the pipe plates are subjected to anti-corrosion spraying treatment to form spraying layers, outer lining layers are arranged on the outer walls of the heat exchange pipes, the inner wall of the shell and the two side walls of the pipe plates which are subjected to anti-corrosion spraying treatment, and the outer lining layers are made of fluoroplastics.

Description

technical field [0001] The invention belongs to the technical field of flue gas treatment, and particularly relates to a flue gas heating system of a fluorine-lined pipe. Background technique [0002] my country's energy structure is dominated by coal, and harmful gases such as sulfur dioxide and sulfur trioxide produced by coal combustion are one of the important reasons for the formation of air pollution and acid rain. At present, wet flue gas desulfurization (FGD) is still dominant in the flue gas desulfurization process of large coal-fired equipment. The wet flue gas desulfurization process mainly uses lime slurry to wash the flue gas in the desulfurization tower, and obtains a higher desulfurization efficiency by increasing the gas-liquid contact area. [0003] The flue gas temperature after wet desulfurization is generally between 40 and 50 °C, the water vapor content is in a saturated state, and it carries many droplets of different sizes. Although the desulfurizati...

AI Technical Summary

Problems solved by technology

However, the corrosion resistance of the heat exchanger in the existing heating system is not good, which leads to a shortened service life, which greatly increases the maintenance cost of the heating system

Images