Shell and tube heat exchangers

Wide metal material shell and tube heat exchangers. Non-metallic materials shell and tube heat exchangers used in chemical production in corrosive fluid heat exchanger, Zhengzhou University research group with limited inflation pressure tube sheet heat welding technology has successfully solved the fluorine plastic shell and tube heat exchanger tube and tube sheet welding technology this problem. Construction: housing, heat transfer tubes, tube plates, baffle plate composition (plate) and pipe boxes and other components. More housing is cylindrical with internal control, and the bundle ends fixed to the tube plate. Both hot and cold heat exchange fluid A flowing in the pipe, known as the tube fluid; the other in the flow tube, called a shell-side fluid. To improve the heat transfer coefficient tube fluid, usually several baffles installed within the housing. Baffle shell fluid velocity can be increased, according to the provisions of forcing fluid from multiple transverse through tubes, enhancing the degree of fluid turbulence. Heat exchange tube plate may be arranged in an equilateral triangle or a square. Equilateral triangle arrangement more compact, high degree of external fluid turbulence tube, heat-transfer coefficient; square arrangement of the outer tube easy to clean, suitable for easy scaling of fluids. Shell and tube heat exchanger shell and tube heat exchanger fluid through tubes every once called a tube; each called a shell by shell. Illustrated as the simplest single shell single tube heat exchanger, referred to as the 1-1-type heat exchanger. To improve the inner tube fluid velocity, the separator may be provided at both ends of the tube inside, the entire tube were divided into several groups. Such fluid through only part of each tube, thus serving several times in the bundle, this is called multi-tube. Similarly, in order to improve the flow rate of the outer tube, the longitudinal baffle can be installed within the housing, forcing the fluid through the housing space repeatedly, called multi-shell. Multi-tube and shell can be used with multiple applications