Regarding the external leakage issue of high flash point valves
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Dear Haihao friends: Generally, gasification furnaces equipped with a high flash point system are designed to have two angle valves, one in use and one as a backup, with these roles being switched regularly. However, the angle valves and the lower cylinder suffer severe erosion. If both angle valves are used simultaneously, or if the one-in-use/one-backup method is employed, which approach causes more wear on the angle valves? Is there any theoretical basis for this, such as water flow velocity?
I have the same problem as you. Here, it’s not the corner valves that are suffering from wear; rather, it’s the high-flash anti-erosion baffles, as well as the connection fittings between the corner valves and those high-flash components, that are experiencing wear. I also hope to hear the valuable opinions of fellow travelers.
1. What are the dimensions of your corner valves and inlet pipes? (Including the case of diameter changes) 2. As a temporary measure, the connection splices and impact protection baffles can be thickened, which is equivalent to adding an outer sleeve to the components. 3. If two angle valves are installed for alternating use, it is generally necessary to do so every 4 hours
It would be best to include photos of the usage effect and on-site piping.
Adding a buffer tank can reduce the impact on the high-flash tank, but erosion of the valve body will still occur.
Personally, I think scheduled switching is better; indeed, pressure-reduction flashing causes wear on the tank and valve components. However, when both methods are used simultaneously with the angle valves opened to a small degree, wear increases under high pressure differences, and continuous use affects the service life of these components
Our black water pipelines have a wall thickness of around 3 cm
Erosion of the cylinder and bottom plate of high-pressure flash valve angles is a common phenomenon. The problem of the bottom plate being punctured can be resolved by thickening the bottom plate to extend its service life ； The problem of wear through the body of the angle valve is mainly caused by too small an opening angle of the valve; when dirty water is ejected from the valve, its dispersion is excessive or uneven, which leads to increased local erosion of the valve body. It is recommended to adjust the CV value of the valve’s internal components
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