A new construction method for flue gas pipeline

Abstract

A novel construction method of a smoke pipeline comprises the steps of 1) prefabricating a plurality of pipe sections by sections in a prefabricating plant; 2) welding an annular plate at the side edge of the end part of one pipe section, and welding sections on interior and exterior of the annular plate; 3) pouring a lining of each pipe section to form a lining layer; 4) hoisting; measuring a clearance between every two adjacent pipe sections; and then mounting high-temperature-resistant asbestos gaskets into the clearances; 5) arranging a slope on the outer wall of the end part of another pipe section, wherein the distance from the end surface of the end part to the end surface of the lining layer is 150mm; 6) welding the slope and the annular plate in the field; and 7) examining the appearance of the welded part; and mounting the rest pipe sections after the appearance of the welded part is qualified. With the adoption of the novel construction method of the smoke pipeline, the process of entering the smoke pipeline to realize pouring or repairing construction seams after mounting of an existing smoke pipeline can be omitted; the technical problems that the aperture of the smokepipeline is subjected to ovality, and edge staggering easily occurs in a welded junction set in mounting can be solved. Therefore, the safety risk is greatly reduced; the cost is saved; and the economic benefit is increased.

Description

technical field [0001] The invention relates to the construction field of flue gas pipelines in catalytic cracking devices of petroleum refining and waste heat power generation projects in smelters, and specifically relates to a novel flue gas pipeline construction method. Background technique [0002] The existing flue gas pipeline construction methods mainly include the following two types: [0003] One is to carry out lining pouring construction after the pipeline is installed in place. This method is suitable for the construction of flue gas pipelines with a large diameter of more than 3m, and the quality is easy to check and control; [0004] The other is to carry out lining pouring construction on the prefabricated pipe section before the pipeline is installed, and then enter the interior of the pipeline to repair the construction joint after the installation is in place. [0005] The above two methods have the following defects in the actual application process: [...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a new type of flue gas pipeline construction method, which saves the need for the existing flue gas pipeline to enter the interior for pouring or repairing construction joints after the installation is completed, and solves the problem of flue gas pipelines due to the large diameter of the flue gas pipeline. There is a large degree of ellipticity, and the welding port group is prone to misaligned technical problems during installation, which greatly reduces safety risks, saves costs, and improves economic benefits

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