Boiler layered hoisting construction method

Abstract

The invention discloses a boiler layered hoisting construction method. By means of the method, the problem that low working efficiency is caused due to later hoisting and mounting of an air preheater and the like in the prior art is solved. The method has the advantages of high safety performance and short construction period. According to the scheme, the boiler layered hoisting construction method comprises the steps of mounting boiler steel frames in a layered mode, and prestoring a primary cold air channel, and/or a primary hot air channel, and/or a secondary cold air channel, and/or a secondary hot air channel, and/or an air preheater, and/or a denitration outlet flue, and/or a burning-out flue, and/or a denitration reactor shell in the process of mounting each layer of steel frame.

Description

technical field [0001] The invention relates to the installation of boilers in power plants, in particular to a construction method for layered hoisting of boilers. Background technique [0002] At present, the boiler steel frame of the power plant is generally divided into two parts according to the hoisting content in the construction stage, one is the steel structure of the boiler steel frame, and the other is the equipment carried on the steel frame, platform escalators and other structures. [0003] During the boiler steel frame construction process, layered and segmented hoisting and continuous construction are generally adopted. The equipment carried on the boiler steel frame structure (such as the cold primary air duct, hot primary air duct, and cold secondary air duct shown in the drawing, the The supplied flue, hot secondary air duct, air preheater, etc.), these structural parts are not pre-stored in advance along with the hoisting of the steel frame, which directl...

AI Technical Summary

Problems solved by technology

As a result, the above-mentioned equipment has to be hoisted after the hoisting of the steel frame is basically completed. At that time, only the method of side penetration and horizontal displacement can be adopted. This mode has a long construction period and takes up a large site. At the same time, there are still poor construction conditions, Low work efficiency, high quality risk, etc., especially the construction safety risk is very large, which is unfavorable to all aspects of construction

[0004] In addition, the number of platform escalators carried on the steel frame structure of the boiler is large, the layered arrival period is long, and the installation workload is large. It is generally difficult to install layer by layer along with the steel frame installation. In the later stage, centralized time installation is adopted. This mode is adopted. The safety conditions of the upper and lower passages during the steel frame installation stage are poor, and there are a large number of up and down cross operations during the installation of the platform escalator, so the safety conditions during the entire boiler steel frame installation stage are poor

Images