Center oxygen lance for coal gasifier

Abstract

The invention discloses a center oxygen lance for a coal gasifier. The center oxygen lance is characterized by comprising a steel shell of a cylindrical structure, a ballast road lining pipe of a lining, a vertical oxygen lance, a bent pipe, a transverse oxygen lance, an auxiliary support and concave-convex spigots. A gap is formed between the shell and the ballast road lining pipe and filled with light heat-preservation sealing materials. The tops and the bottoms of the shell and the ballast road lining pipe are connected with steel check rings respectively. On the severe working conditions of high temperature and high pressure, corrosive gas corrosion, and high-hardness particulate matter erosive wear, a center pipe has the long maintenance-free service life. The ballast road lining pipe, the auxiliary support, the bent pipe and the vertical oxygen lance are made of high-temperature non-metallic materials resisting corrosion, wear and oxidation, and have the long service life. The vertical oxygen lance is made in a subsection mode, and every two adjacent sections are connected through one concave-convex spigot. The quick cooling and heating resistance can be effectively improved, and the service life of the center oxygen lance is further prolonged.

Description

technical field [0001] The invention belongs to the coal chemical industry equipment and the technology of the central oxygen blowing tube of the coal gasification furnace. technical background [0002] The central oxygen blowing pipes of coal gasifiers that are currently in common use all use heavy refractory castables to manufacture slag tunnel liners (3) and fillings (4). Its disadvantage is that it is not wear-resistant, has a short life, is heavy in weight, and has a high surface temperature; the vertical blowing oxygen pipe (8), bent pipe (7) and support (6) are made of high-temperature resistant stainless steel, and its disadvantage is that it is not wear-resistant at high temperature Damage, no corrosion resistance, no oxidation resistance, short service life. Especially the top of the vertical blowing oxygen pipe, under the joint action of 1300°C high temperature, strong oxidizing gas, various corrosive gases, and high-hard cinder particles wear, its disappearance ...

AI Technical Summary

Problems solved by technology

Its disadvantage is that it is not wear-resistant, has a short life, is heavy in weight, and has a high surface temperature; the vertical blowing oxygen pipe (8), bent pipe (7) and support (6) are made of high-temperature resistant stainless steel, and its disadvantage is that it is not wear-resistant at high temperature Damage, no corrosion resistance, no oxidation resistance, short service life

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