Construction method of dismantling and constructing natural gas steam reformer tube in different places

Abstract

The invention relates to a construction method for remote removal and construction of a furnace tube of a natural gas steam reformer and belongs to the field of removal of chemical equipment. The construction method is characterized in that when bottom gas collecting tubes are dismounted, each row of lower gas collecting tubes are cut into three sections, namely, a north section, a middle section and a south section, wherein 19 conversion tubes are remained in the north section, 14 conversion tubes and 1 ascending tube are remained in the middle section, and 19 conversion tubes are remained in the south section; and a notch is located at the welding line of an extending section and a transition section of the ascending tube. The construction method is low in removal cost and the natural gas steam reformer can be put into operation safely and efficiently after being removed.

Description

technical field

[0001] The invention belongs to the field of chemical equipment relocation, and in particular relates to a construction method for dismantling and constructing a furnace tube of a natural gas steam reformer in a different place. Background technique

[0002] In the 400,000-ton synthetic ammonia plant produced by Kellogg Corporation of the United States, the primary reformer is the key equipment of the large-scale synthetic ammonia plant. The working pressure of the furnace tube in the radiant section is as high as 3.5 MPa, the temperature is 920°C, and the treatment medium is hydrogen-rich gas. The reforming tube in the reforming furnace tube is divided into a rising tube and a lower gas collecting tube. The material of the rising tube and the lower gas collecting tube is Incoloy800, which is austenitic heat-resistant stainless steel. This material has good high temperature oxidation resistance and chlorine resistance. Ionic stress corrosion. There are 416 c...

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