Seawater condenser, English name: Seawater condenser, also known as seawater cooler or seawater heat exchanger. Its superior corrosion resistance and aging resistance make it widely used in offshore oil, marine air conditioners, marine refrigeration equipment, chemical, pickling, electroplating, medicine, anodizing and other industries. At the same time, because of its excellent temperature resistance, it is suitable for both For steam heating, but also for hot water heating.
1. Material selection:
Depending on the composition of the seawater, the material selection requirements of the condenser tube are different. Clean seawater is not the same as polluted seawater.
The seawater condenser is usually a horizontal shell and tube type. The material of the condenser is usually HAl77-2 aluminum brass, BFe10-1-1 (Cu90-Ni10), BFe30-1-1 (Cu70-Ni30) copper-nickel alloy and Ti titanium Alloy tube ... The copper head material of the condenser is made of ZCuAl9Mn2 bronze alloy. The shell and tube can be made of 316L stainless steel or Q345 and 16MnR low carbon steel pipe according to different requirements, and titanium alloy composite materials can also be used.
2. Corrosion-resistant treatment:
The end caps are made of cast iron or carbon steel, then a thick paste epoxy coal tar pitch primer, two thick paste epoxy coal tar top coats are painted on the seawater side, and an aluminum alloy is set (performance requirements according to GB4948-85) Anode device, obvious anticorrosive effect
The material of the tube sheet or its composite layer in contact with seawater shall be consistent with the tube material.
In order to increase the corrosion resistance of the condenser tube of the seawater condenser, we have done a corresponding pre-film treatment. Through comprehensive tests, we found that the seawater condenser with pre-film treatment has a significantly reduced corrosion rate every 10,000 hours.