A method for thermal insulation of hot gas pipelines

Abstract

The invention provides a hot coal gas pipeline inner heat preservation method which is characterized in that a hot coal gas pipeline is separated into hot coal gas pipeline sections; a light heat insulating material is cast in each hot coal gas pipeline section to form a heat preservation layer; and buckles and flange plates are arranged and mounted at the two ends of each hot coal gas pipeline section. The hot coal gas pipeline can be processed with equipment simultaneously, and after conveyed to a site, the hot coal gas pipeline can be assembled simply by coating an adhesive on the buckles of every two hot coal gas pipeline sections, additionally adopting an aluminium silicate fiber needle-punched carpet and then butting every two flange plates with bolts; a heat preservation function can be exerted; the corrosion problem of the hot coal gas pipeline is solved thoroughly; and the hot coal gas pipeline inner heat preservation method has the advantages that the manufacturing is simple, the mounting is convenient and flexible, the service life of the hot coal gas pipeline is prolonged, and a heat utilization rate is increased.

Description

technical field [0001] The invention belongs to the technical field of pipeline heat preservation, and in particular relates to a method for heat preservation inside a hot gas pipeline. Background technique [0002] Since the gas generator has been widely used in large-scale production, it has played a considerable role in all walks of life. It is mainly divided into two types: hot gas station and cold gas station. The main difference is that the gas generated in the hot station is directly transported to the user after electric coke capture and cyclone dust removal, while the gas in the cold station needs to be washed, purified and cooled to enter the storage gas tank for pressure stabilization after being subjected to electric coke capture and cyclone dust removal. sent to the user. Relatively speaking, the gas produced in the cold station is cleaner, less corrosive, stable in pressure and lower in heat utilization than the hot station. However, due to different producti...

AI Technical Summary

Problems solved by technology

However, the production and installation of on-site insulation for gas pipelines in thermal stations is quite troublesome.

At present, there are two types of insulation for this type of pipeline: the first one is to cut the steel pipe into sections according to the requirements of the process and directly butt weld it, and then use aluminum silicate fiber cotton for insulation on the outside of the pipeline to slow down the sudden drop in the temperature of the hot gas It is widely used because of its simple operation, but because the hydrogen sulfide gas in the hot coal gas corrodes the gas pipeline very seriously, so far there is no good way to solve this problem

The second method is to use a steel pipe with a cross-sectional diameter greater than 1000mm and lay refractory bricks inside for heat preservation. This method makes the pipe heavy and has poor heat preservation effect, which is not convenient for high-altitude erection, increases the difficulty of construction, and prolongs the construction period.