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A fluorine-lined insertion tube suitable for high-temperature acid-base reaction conditions

An acid-base reaction and insertion tube technology, which is applied in the field of insertion tubes, can solve problems such as complex structure and poor corrosion resistance, and achieve good impermeability, strength, and performance.

Active Publication Date: 2021-04-27
NINGBO JUHUA CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the structure is complex, and the corrosion-resistant interlayer does not completely isolate the material from the metal pipe wall. It only relies on the inner layer of copper oxide to prevent corrosion, and the corrosion resistance effect is not good. It is only suitable for OPP film extruders

Method used

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  • A fluorine-lined insertion tube suitable for high-temperature acid-base reaction conditions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A fluorine-lined insertion tube suitable for high-temperature acid-base reaction conditions, including a tube body, which includes an outer tube 2 (made of 20# steel) and an inner tube 7 ( The material is NEWPTFE), one end of the inner pipe 7 protrudes from the outer pipe 2, the outer pipe 2 is provided with a bushing 6, and the bushing 6 is composed of an outer lining pipe 6-1, an inner lining pipe 6-2 and a lining plate 6-3, and the outer There is an annular cavity between the liner 6-1 and the inner liner 6-2, and the outer tube 2 is inserted into the cavity; the material of the outer liner 6-1 and the inner liner 6-2 are both PTFE, and the isostatic pressure is adopted Pipe tight lining process tight lining fit, the outer liner 6-1 and the inner liner 6-2 are welded to each other, and a protective plate (not shown in the figure, the material is PFA) is arranged outside the weld; the outer pipe 2 is also equipped with equipment The side flange 3 and the pipeline side...

Embodiment 2

[0031]A fluorine-lined insertion tube suitable for high-temperature acid-base reaction conditions, including a tube body, which includes an outer tube 2 (made of 20# steel) and an inner tube 7 ( The material is PTFE), one end of the inner pipe 7 protrudes from the outer pipe 2, the outer pipe 2 is provided with a bushing 6, and the bushing 6 is composed of an outer lining pipe 6-1, an inner lining pipe 6-2 and a lining plate 6-3, and the outer There is an annular cavity between the liner 6-1 and the inner liner 6-2, and the outer tube 2 is inserted into the cavity; the material of the outer liner 6-1 and the inner liner 6-2 is PFA, and PFA roller coating is used Process tight lining fit, the outer liner 6-1 and the inner liner 6-2 are welded to each other, and a protective plate (not shown in the figure, made of PFA) is arranged outside the weld; the outer pipe 2 is also equipped with an equipment side flange 3 and the pipe side flange 5, the equipment side flange 3 is support...

Embodiment 3

[0033] A fluorine-lined insertion tube suitable for high-temperature acid-base reaction conditions, including a tube body, which includes an outer tube 2 (made of 20# steel) and an inner tube 7 ( The material is NEWPTFE), one end of the inner pipe 7 protrudes from the outer pipe 2, the outer pipe 2 is provided with a bushing 6, and the bushing 6 is composed of an outer lining pipe 6-1, an inner lining pipe 6-2 and a lining plate 6-3, and the outer There is an annular cavity between the liner 6-1 and the inner liner 6-2, and the outer tube 2 is inserted into the cavity; the material of the outer liner 6-1 and the inner liner 6-2 are both PTFE, and the isostatic pressure is adopted Pipe tight lining process tight lining fit, the outer liner 6-1 and the inner liner 6-2 are welded to each other, and a protective plate (not shown in the figure, the material is PFA) is arranged outside the weld; the outer pipe 2 is also equipped with equipment The side flange 3 and the pipeline side...

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Abstract

The invention discloses a fluorine-lined insertion tube suitable for high-temperature acid-base reaction conditions, comprising a tube body, the tube body includes an outer tube and an inner tube arranged in the outer tube and detachably connected with the outer tube, one end of the inner tube protrudes from the outer tube , the outer pipe is provided with a bushing, the outer pipe is inserted into the bushing, and the outer pipe is also provided with an equipment side flange and a pipe side flange, a rib plate is provided between the equipment side flange and the pipe side flange, and the equipment side The flange is provided with equipment supporting screw holes that can fix the pipe body on the wall of the equipment as a whole. The end of the inner pipe protruding from the end of the outer pipe is provided with a sealing plate. The sealing plate is fixed by bolts, and the bolts are pins to prevent withdrawal. The invention has the advantages of simple structure, safety and reliability, stable operation, high efficiency and economy, and wide application range.

Description

technical field [0001] The invention relates to the technical field of insertion tubes, in particular to a fluorine-lined insertion tube suitable for high-temperature acid-base reaction conditions. Background technique [0002] In the reaction equipment of acid-base media such as sulfuric acid drying, hydrochloric acid synthesis, and methyl chloride synthesis, chemical companies design and use glass-lined kettles according to different working conditions due to the strong corrosiveness of hydrochloric acid, sulfuric acid, hydrofluoric acid, and lye. , carbon steel lined PE / PTFE / ETFE / PFA / PPS and other materials for reaction kettles and storage tanks. In this type of equipment, in order to meet the requirements of process gas distribution and break the vortex Pipes, etc. need to be designed as insertion pipes according to process requirements. Lining insertion pipes are different from conventional carbon steel or stainless steel and other metal insertion pipes. Because a layer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/14F16L41/08F16L58/10
CPCF16L9/14F16L41/086F16L58/1054
Inventor 李刚周强徐翔钟骏良周卫家杜继立
Owner NINGBO JUHUA CHEM TECH CO LTD