What kinds of mechanical seals are commonly used for separating temperature medium pumps? -

What kinds of mechanical seals are commonly used for separating temperature medium pumps?

　2020-05-09　　

Common mechanical seals for separating temperature medium pumps:

⑴Hot water pump

Figure 9-7 shows the mechanical seal for the circulating hot water pump of the waste heat boiler. The characteristics of this kind of mechanical seal are: the moving and static ring seats are made of titanium, and its expansion coefficient is small, which is similar to the carbonized prayer, and it is easy to fix the moving and static rings; the auxiliary seal adopts PTFE V-shaped sealing ring to ensure Followability of dynamic and static rings at working temperature; adopts self-washing from the outlet liquid cooler, the cooling high pressure liquid is sent to the shaft seal box for washing, the structure is simple, because the washing liquid cooler is used, it can ensure that the auxiliary close to the PTFE allows working Within the scope, the problem of high-temperature auxiliary sealing is solved. Among them, the heat transfer area of u200bu200bthe cooler is 1 square meter, the tube length is 23.3m, the circulating water volume is 6L/min, and the cooling water volume is 60L/min.

⑵High temperature oil pump mechanical seal

In petrochemical and oil refining plants, the hot oil pumps with higher temperatures used include tower bottom hot oil pumps, heat carrier pumps, slurry pumps, residual oil pumps, wax oil pumps, asphalt pumps, molten sulfur and plasticizer pumps, etc. .

In high-temperature oil pumps, the sealing pair adopts hard-to-hard to solve the low-pressure pressure reduction tower bottom hot oil pump sealing with solid particles, and the elastic element adopts welded metal bellows to solve the hot oil pump sealing under different pressures. The shaft seal box is adopted. The cooling jacket reduces the temperature to solve the sealing of the hot oil pump, the finned cooling shaft seal box is used to protect the auxiliary seal to solve the sealing of the hot oil pump, and the double end seal is adopted to strengthen flushing.

Figure 9-7 Mechanical seal for circulating hot water pump of waste heat boiler

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