How does an internal floating roof reduce material loss?
Thread Content
The internal floating roof of an internal floating roof tank does not have any gas storage space; how can this reduce the loss of material due to vaporization caused by rising material temperature? Gentle experts, please help analyze it.
One project we worked on involved applying heat-resistant coating to the outer wall of internal floating roof storage tanks; we have also seen systems with water spray installed on the tank tops. I’ve also seen information stating that cooling thermal insulation adhesive is used. These measures can all reduce the volatilization of the medium inside the tank to a certain extent.
The internal floating roof minimizes the space for material evaporation, thereby reducing material loss.
First, consider controlling the temperature rise of the tank; a white reflective heat-insulating coating is applied on the outside, along with spray cooling.
What I want to say is that the documentation claims that storage tanks with internal floating structures can reduce volatility losses by over 85%, but in reality, the volatility caused by rising temperatures cannot be reduced.
It is mainly a matter of concentration difference; without a gas phase environment, the degree of evaporation of the oil products decreases
1. The sealing ring of the floating disk should be of the immersion type, and its sealing condition must be checked regularly during normal operation. 2. Minimize the entry of light components into the oil product. 3. Consider adding a nitrogen sealing facility.
1. Cool down. 2. If that doesn’t work, add a nitrogen seal
The following approaches can be considered: 1. A nitrogen seal can be added above the inner floating disk； 2. The internal floating disk is of the fully submerged tank type, with its entire bottom surface in contact with the liquid; there is no space for oil or gas. The edge sealing ring utilizes a liquid-filled design combined with a secondary tongue-shaped seal. In this way, the requirements of the Ministry of Environmental Protection’s GB31570/GB31571 can be met.