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

A construction method, natural gas technology, applied in the direction of manufacturing tools, metal processing equipment, arc welding equipment, etc., can solve the problem of high relocation costs

Active Publication Date: 2017-09-15
CHINA CHEM ENG SECOND CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the business needs of the enterprise, it is necessary to relocate the synthetic ammonia plant from A to B, and the relocation cost is high

Method used

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

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Embodiment Construction

[0021] The construction method of dismantling and constructing the natural gas steam reformer furnace tube in different places, including the dismantling of the lower gas collecting pipe, the dismantling of the lower support, the bevel processing of the welding joint of the lower gas collecting pipe, the butt welding of the lower gas collecting pipe group, the bevel processing of the welding joint of the rising pipe, the bevel processing of the rising pipe Butt welding, pigtail welding.

[0022] The lower air collecting pipe is dismantled, and each row of the lower air collecting pipe is cut into three sections of north, middle and south, among which there are 19 conversion pipes in the north section, 14 conversion pipes and 1 ascending pipe in the middle section, and 19 conversion pipes in the south section; The cut is located at the weld between the overhanging section of the riser and the transition section;

[0023] The north and south in the present invention refer to the...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16B23K9/32
CPCB23K9/164B23K9/32
Inventor 杨玉花王瑞军
Owner CHINA CHEM ENG SECOND CONSTR
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