The distance between the process gas outlet pipeline and the oxygen pipeline of the gasifier is too short

There should be no problem; oxygen is in flow, so it shouldn’t have much of an impact on it.

The insulation layer should work, right? A distance of thirty to forty centimeters is sufficient

The thickness of the insulation is 50, and the distance is a bit small.

When oxygen pipelines are laid together with pipelines for flammable gases, liquefied hydrocarbons, and flammable liquids, they should be arranged on one side; when laid parallel to each other, the clear distance between them should be no less than 500 mm, and when laid at an angle, the clear distance should be no less than 250 mm. When oxygen pipelines are shared on the same support frame as pipelines for flammable gases and flammable liquids, they should be separated from each other by utility pipelines

Principles for pipeline layout design: (1) The pipeline layout design must meet the requirements specified in the Piping and Instrumentation Diagram (PID). It should be arranged in a neat and aesthetically pleasing manner, while also being economical and reasonable, all while ensuring production safety as well as facilitating construction, operation, and maintenance. (2) The pipeline installation design should be comprehensively considered based on the specific production characteristics, in conjunction with the equipment layout, as well as the conditions of buildings and structures. (3) The pipeline layout must comply with safety and environmental protection regulations, and must meet the requirements regarding fire prevention, explosion prevention, safety protection, and environmental protection. (4) The piping layout should ensure that the pipelines have sufficient flexibility to reduce stresses caused by temperature changes. For pipes connecting moving equipment, care should be taken to control the natural frequency of the pipes in order to avoid resonance. (5) The pipeline layout shall strictly follow the pipeline grade table when selecting pipelines and pipeline accessories.

What was said on the 5th floor is correct: Clause 8.1.5 of GB 16912-2008, Safety Technical Regulations for the Production of Oxygen and Related Gases by Deep Freezing Method, stipulates that oxygen pipelines should not pass through areas with high temperatures or flames; if it is necessary for them to pass through such areas, thermal insulation measures must be installed in those sections of the pipeline, and the wall temperature should not exceed 70 degrees℃； 8.1.10 Requirement: The minimum clear parallel distance between oxygen pipelines and gas pipelines is 0.5 meters, and the minimum clear crossing distance is 0.25 meters. Currently, in the vast majority of water-coal slurry gasification units, the oxygen main pipes (the horizontal pipes within the frame) are located on the side of the gasification furnace’s process gas outlet, and at a distance relatively close to the furnace; these pipes are exposed to the high-temperature radiation from the furnace walls, which causes their temperature to rise. The most dangerous situation is when there is a leak in the flange at the outlet of the process gas from the vaporization furnace; this can lead to the emergence of flames. It is extremely dangerous if these flames are close to the oxygen pipelines or if they directly ignite those pipelines. I once suggested that the design institute arrange the oxygen pipelines opposite the outlet of the process gas, and then insulate the oxygen pipelines located near the gasifier shell; this would make things safer.