Shell-tube heat exchanger

Shell-tube heat exchanger, also known as tubular heat exchanger, is a general standard heat exchange equipment. It has the advantages of simple structure, durability, low cost, wide range of materials, easy cleaning, strong adaptability, etc. It is widely used and plays a leading role in heat exchange equipment. The shell-tube heat exchanger is to connect the heat exchange tube bundle with the tube plate, and then wrap the tube with the shell to form two independent spaces. The channel in the tube called tube side; The channel outside the tube and the part connected with it are called shell side. One kind of fluid flows in the tube, while the other kind of fluid flows from the outer surface of the tube between the shell and the tube bundle. In order to ensure that the shell side fluid can cross the tube bundle to form a higher heat transfer rate, many baffles are installed in the shell.

Classified according to structure

Type	Construction features	Advantage
Fixed tube plate heat exchanger	The utility is composed of a shell, a tube bundle, a head, a tube plate, a baffle plate, a nozzle, etc. The structural features: Both tube plates are welded on each end of the shell respectively,tube bundle ends are fixed with tube plate. The tube bundle can be made into single pass, double pass or multiple pass. The utility is suitable for the working conditions where there is small temperature difference between shell and tubes.	The structure is simple and compact. With the same shell diameter, there are more tubes and less bypasses; Each tube can be replaced one by one, tube is easy to clean.
Floating head heat exchanger	The floating head heat exchanger is applicable to the situations where there is large temperature difference between shell and tubes or the shell side medium is easy to scale. The structural feature is that one of the tube plates at both ends is not fixedly connected with the shell, and can freely expand and contract in the shell along the axial direction, which is called the floating head.	The shell or tube would expand while there is a large temperature difference between the tube and shell, they are not constrained to each other and will not produce temperature difference stress; The tube bundle can be drawn out from the shell for further cleaning easily.
U-tube bundle heat exchanger	The structure features: only one tube plate,both ends of the tube are fixed on the same tube plate with U-shaped tube bundle, which can expand and contract freely. When there is a large or small temperature difference between the shell and the tubes, there will be no temperature difference stress. The utility model can make up for the complex structure of the floating head heat exchanger, and at the same time, the utility model can retain the advantages that the heat exchange tube bundle can be drawn out and the thermal stress can be eliminated.	Plate, less sealing points, reliable operation and low cost; The tube bundle can be drawn out, and easy cleaning.
Stuffing box heat exchanger	A modified structure of floating head heat exchanger, which moves the floating head originally placed in the shell side out of the body and uses a stuffing box to seal the leakage of medium in the shell side. The structural feature: only one end of the tube plate is fixedly connected with the shell, and the other end is sealed with a stuffing box. The tube bundle can expand and contract freely without temperature difference stress caused by temperature difference between shell and tube.	Compared with floating head heat exchanger, it is simple in structure,easy fabrication, less consumption and low cost; The tube bundle can be drawn out from the shell, easy cleaning for convenient maintenance.

Marine Application

According to professional compliance technology and customer requirements,adopting highly standardized design by using alloy metals, we produce a full range type of heat exchangers helping shipowners or clients to integrate innovative solutions into complete applications to promote the higher performing of ship sailing.We also provide retrofit upgrade of new product solutions for the heat exchanger through accurate heat energy calculation.Our productions appear to be in the lead with features :high performing, strong anti-corrosion,long service life.We are experienced in providing products and solutions on over 1000 vessels by using in follow marine heat transfer systems:
Lubricating oil cooling
Engine water cooling
Central cooling system
Hydraulic oil system
Cooling liquid system
Steam recovery system (atmospheric condenser)
Tank cleaning heater (seawater). used for cleaning tanks heated by steam or oil heat transfer.

Heat-Transfer Medium

Hot side: fresh water,Steam,lubrication oil,thermal oil,
Cold side: fresh water,Sea water

Heat treat capacity

Lubricating oil cooler: seawater inlet temperature 32C°, outlet temperature 50C°
Tank cleaning heater: maximum 150 m3/h, seawater inlet temperature 5C°, outlet temperature 80C°
Condenser: condensate outlet temperature 80C°, seawater inlet temperature 32C°, outlet temperature 50C°

Main materials

Tubes: CuNi 90/10,CuNi 70/30
Tube plat: AlNi-bronze
Shell : carbon steel.