What is an explosion venting tank?
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What is an explosion venting tank? It seems that previous process designs didn’t include such equipment, right? With the tightening of safety regulations, such equipment has begun to appear in process design. As shown in the figure below, this alkylation reactor (R1101) is connected to a vent tank; how should this flowchart be understood? Is this explosion vent tank normally kept at a slight positive pressure by filling it with nitrogen? The pipe that bends downward at the flame arrester on the right side also indicates an open connection to the outside; it’s confusing why nitrogen has to be continuously used. . . 、
An explosion venting tank is a safety device, typically used in high-pressure and high-temperature equipment in industries such as chemicals and petrochemicals. Its function is to reduce the pressure inside the device by releasing the internal medium in the event of overpressure or overheating, thereby preventing explosions or other serious accidents. With **increasing demands for safe production, it is normal to include venting tanks in process design. Normally, the explosion venting tank is connected to the equipment it is designed to protect, and it remains under a slight positive pressure. When an abnormal situation occurs in the protected equipment, the venting tank quickly releases the contents inside, thereby preventing an explosion. The pipe that bends downward at the right-hand flame arrester is intended to facilitate the discharge of the released medium, rather than allowing the explosion vent tank to continuously consume nitrogen. .
According to your process setup, a single-vent valve should be installed before the flame arrester. Your process includes nitrogen sealing; if a one-way valve is not installed, nitrogen will keep being consumed.
Agree with what was said on the 3rd floor. It seems like this jar isn’t very useful; once it’s taken off, it’s just thrown away. What’s the difference between that and simply discarding it directly?
Placing organic, flammable, acidic, or alkaline substances directly can expand the scope of the accident or pollute the environment; collecting them prevents such problems
This post was last edited by cust008 on 2023-5-23 11:22. How much can a pressure-free tank hold? Not even a little can be collected; it’s already under slight positive pressure, so the pipeline connected to the flame arrester simply vents to the atmosphere. Previously, it contained nitrogen; now, the reaction gas is directly vented. I don’t think this jar is useful in the representation on this diagram. It is very likely that the design did not thoroughly understand the venting tank. It’s also possible that the design itself doesn’t take this into account; it’s the sketches provided by their organization that are used for the design. Besides, in the end it’s all just released directly – why go through all this trouble? This container is completely unable to hold harmful gases; even if such gases are stored in it, they will eventually be released. What’s the point of that? Is it to control the pace of prevention and control, prevent large-scale releases in a short period of time, and use time to obtain environmental data? A single flame arrester seems insufficient to achieve such an effect.
As I understand it, the purpose of designing an explosion vent tank is to prevent liquids from being carried along with the gases released during an explosion into the flare or combustion system; it serves as a buffer and for separating gas from liquid. If the device used for releasing gases is already a gas-related device, then I don’t think such an explosion vent tank is necessary.
A venting tank is installed in reaction equipment, usually reaction vessels, with the purpose of separating gas from liquid, collecting the material discharged by safety valves and rupture discs, and preventing splashing from causing wider-scale damage. The emission isn’t directed to a flare; a nitrogen seal is pointless – it’s sufficient to simply add a flame arrester and vent it directly.
The definition of explosion venting is that no resistance should exist; therefore, a one-way valve can be installed, along with a glass rotameter to supply a continuous flow of a small amount of nitrogen. This is done to ensure that, in the event of an explosion, no explosive mixture will form inside the venting tank.