Chimney adopting glass fiber reinforced plastic chimney inner barrel to discharge low-temperate high-humidity smoke

Abstract

The invention relates to a thermal power plant chimney which adopts limestone-gypsum wet desulphurization and is not provided with a smoke heating device. The chimney comprises a reinforced concrete chimney outer barrel and a plurality of glass fiber reinforced plastic chimney inner barrel sections which are set in length and are connected with each other. The chimney is characterized in that end parts connected between the glass fiber reinforced plastic chimney inner barrel sections are of an insertion structure form, the upper portion of the insertion structure form is a plug, the lower portion of the insertion structure form is an insertion groove, annular inverse brackets are arranged on outer walls of the glass fiber reinforced plastic chimney inner barrel sections, and the glass fiber reinforced plastic chimney inner barrel sections are hung on a reinforced concrete chimney steel platform through the arranged annular brackets. The chimney has the advantages that cost for purchasing, installing, maintaining and replacing expansion joints is saved, condensing liquid plays a liquid sealing role and ensures the air-tightness of the glass fiber reinforced plastic chimney in the operation process, the insertion groove can be used as a water collecting device to collect condensing water, and service life is long. Moreover, the glass fiber reinforced plastic chimney can not be restricted in design height, and is convenient to install.

Description

technical field [0001] The invention relates to a chimney used in coal-fired power plants, chemical industry, and environmental protection fields, in particular to a chimney of a thermal power plant that adopts limestone-gypsum wet desulfurization and does not have a flue gas heating device. Background technique [0002] With the continuous improvement of environmental protection requirements, it is necessary to install a wet desulfurization device (FGD) to absorb harmful impurities in the exhaust gas of thermal power plant boilers or industrial furnaces. Considering the cost problem, the currently widely used and mature method is to adopt the limestone-gypsum wet desulfurization process (WFGD) and do not install a flue gas heating device (GGH) after wet desulfurization. After desulfurization, the humidity of the flue gas increases and the temperature decreases. The flue gas condenses on the inner wall of the chimney, producing a large amount of condensate, and the residual ...

AI Technical Summary

Problems solved by technology

The material of the expansion joint is generally rubber, which is easy to age in an acidic environment and has a short service life. It needs to be replaced frequently within the design period of the power plant, which seriously affects the normal operation of the power plant unit.

In addition, the installation, maintenance and replacement of expansion joints are relatively difficult, and the cost of purchase, installation and maintenance is also relatively high. The water collection device in the inner tube section of the FRP chimney is not effective in collecting condensate in some areas, and part of the condensate flows back into the flue, causing corrosion to the flue

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