Sectional Installation Method of Square Raw Coal Hopper

Abstract

The invention provides a segmented mounting method for a square raw coal hopper. The segmented mounting method for the square raw coal hopper comprises the steps that the raw coal hopper is manufactured and combined in a segmented mode; corrosion prevention is conducted on the ground where the raw coal hopper is located in a segmented mode; the raw coal hopper is transported in a segmented mode; the raw coal hopper is hoisted in a segmented mode; and assembling is conducted. By adoption of the segmented mounting method for the square raw coal hopper, the high-altitude butt joint workload is greatly reduced, the working time is shortened, the number of all-round scaffolds required when a traditional single-segment construction scheme is adopted is reduced, the cost is reduced, and the construction efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of power plant construction, in particular to a segmented installation method for square raw coal scuttles. Background technique [0002] In a low calorific value coal power generation and heating project of a power plant (2×350MW), the square raw coal hopper of the unit is located between the columns B-C of the main workshop. The upper straight cylinder of each raw coal scuttle has dimensions of 8×7.7m and a height of 3.3m, and the lower cone section is a square cone with a height of 9.3m. Each coal scuttle is hung on the lugs of the 40.3m layer coal hopper beam between the coal bunkers through the upper horizontal reinforcement plate. [0003] The traditional construction method of the above-mentioned raw coal scuttle is a construction scheme in which the material is laid on one side of the wall, the outer reinforcement is installed, and the single piece is hoisted, and finally assembled (ie, piecewise in...

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Problems solved by technology

[0004] 1) When each piece is in place, it needs to be hung by a chain hoist or a wire rope head. The local gusts are frequent, and the single piece has a large windward surface, which is not easy to fix, which increases the risk of welding and assembly;

[0005] 2) There are many mechanical shifts, and the workload of the scaffolding that needs to be erected before assembly is heavy, which increases the construction cost

[0006] 3) More hand chain hoists and wire ropes are required for assembly, and the cost is higher

[0007] 4) There are many butt welding points, the assembly time is long, the construction efficiency is reduced, and the construction period is long

[0008] 5) The square raw coal scuttle has many material specifications, and the welding and assembly workload is relatively large

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