Design of large storage tanks: For sulfuric acid storage tanks, which is better – an inlet at the top or at the bottom?
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This post was last edited by forowhl on 2024-12-28 at 15:09. After reading several articles, it seems that it’s better to install it at the top of the storage tank. However, if it is installed at the top, pipes must be run from the top down to the bottom. Due to gravity, the flow rate of the fluid reaching the bottom is very high; won’t this cause erosion and corrosion to the pipes and the bottom floor of the tank? Couldn’t the inlet be placed at the bottom, with the extending tube made a bit longer?
It’s better to have it at the top. Indeed, there is the issue of high flow rates when introducing feed from the top to the bottom, but these flow rates can be reduced and the direction of flow can be dispersed by installing buffer devices or altering the pipe structure, thereby minimizing erosion of the bottom plate. While the bottom inlet avoids the problem of guide pipes, it is more prone to sediment accumulation and makes cleaning difficult. Furthermore, the bottom inlet is usually more susceptible to mechanical damage and corrosion. .
“The bottom inlet is usually more susceptible to mechanical damage and corrosion. ”Are you referring to the junction between the tank wall and the pipe connections? Can’t the entrance be made a bit longer?
Yes, the junctions between the tank wall and the nozzles at the bottom inlet are more susceptible to mechanical damage and corrosion. Although lengthening the inward-extending tube can alleviate these problems to some extent, it is still difficult to completely avoid them. An extended inner extension tube may lead to difficulties in cleaning and maintenance, as well as increase the complexity of the internal structure. The top inlet, through the rational design of flow channels and the installation of protective measures, can more effectively control hydrodynamics, ensuring the long-term stability and safety of the storage tank. .
Reducing leakage risk: Placing the inlet at the top of the tank and keeping a certain distance between the pipe outlet and the tank wall (such as at least 1200 mm) can effectively reduce the risk of leakage caused by contact between the pipe outlet and the tank wall. At the same time, extending the pipe opening below the liquid level using a suction tube can further reduce the likelihood of leakage. Protecting the tank bottom: Installing a shock plate at the position corresponding to the end of the inlet pipe directly below the tank bottom is an important measure to protect it from erosion and corrosion. If the inlet is located at the bottom of the tank, this protective measure will be difficult to implement, and the bottom of the tank is more susceptible to erosion and corrosion by sulfuric acid. Easy to operate and maintain: The top access point facilitates routine inspection, maintenance, and cleaning by operators. In contrast, bottom entrances may be more difficult to operate and maintain. Also note: an open space is needed at the top of the jar ； Import pipelines need to be designed to prevent siphoning.