External structure of the ammonia synthesis tower
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Apart from that one incident, high-pressure hydrogen and nitrogen gas flowed into the synthesis tower and caused a fire; the system was shut down immediately and pressure was slowly reduced. At that time, a large area turned red, which was quite scary. Two days later, it was stated that the pressure was within acceptable limits and the system could be used again (our operating pressure is 15 MPA). I want to know what the external structure of the synthesis tower can withstand in terms of pressure
It was the outer tank. At that time, the safety valve of our circulation pump was not designed properly; after it tripped, it wasn’t reset in time. Fortunately, action was taken promptly and no accident occurred
There are multi-layer bundled types as well as single-layer types; they are generally designed to withstand pressure but not temperature. If the surface turns red, it is necessary to determine whether it is due to high-temperature paint or the equipment itself. The temperature of the equipment itself usually does not exceed 204 degrees, while a red color indicates temperatures above 700 degrees.
Ammonia synthesis towers are generally of the multi-layer laminated type nowadays; there are also single-layer forged cylinders. Their design is aimed at withstanding high pressures. They are usually heat-treated in the manufacturer’s facility before being transported to the site for installation. If phenomena such as extreme high temperatures occur, it is serious, and it is necessary to have a pressure vessel inspection department conduct a thorough examination to ensure that no expansion defects occur in the multi-layer composite structure or the single-layer cylinder, thereby preventing major accidents.
In chemical production, safety comes first. It is advisable to conduct a thorough inspection of the synthesis tower and its internal components; one should not neglect production safety for petty gains. Also, is the discharge port of the circulator’s safety valve directly facing the synthesis tower? Who designed and built it! This is a serious safety hazard that must be addressed immediately; under no circumstances should it be used in the synthesis tower. Personal suggestion: During the comprehensive inspection of the synthesis tower (if it is possible to do so), conduct a simultaneous inspection for safety hazards throughout the plant and take measures to address them.
It is advisable to conduct a thorough inspection of the synthesis tower and its internal components; one should not neglect production safety for petty gains.
If it is multi-layered, it may cause the outermost and second-outermost layers to become loose, failing to exert the required tensile force!