Stainless Steel Tubular heater With Simple Structure

Tubular heat exchanger consists of components such as a shell, heat transfer tube bundle, tube plate, baffle plate (baffle), and tube box. The shell is mostly cylindrical, with a bundle of pipes installed inside, and the two ends of the bundle are fixed on the tube plate. There are two types of fluids for heat exchange: cold and hot. One flows inside the tube and is called the tube side fluid; Another type of flow outside the tube is called shell side fluid. To improve the heat transfer coefficient of the fluid outside the pipe, several baffles are usually installed inside the shell. Baffles can increase the fluid velocity on the shell side, forcing the fluid to pass through the tube bundle multiple times according to the specified path, and enhancing the degree of fluid turbulence. The heat exchange tubes can be arranged in equilateral triangles or squares on the tube plate. The equilateral triangle arrangement is relatively compact, with a high degree of turbulence in the fluid outside the pipe and a large heat transfer coefficient; A square arrangement makes cleaning outside the pipe convenient and suitable for fluids that are prone to scaling.

The main control parameters of Tubular heat exchangers are heating area, hot water flow rate, heat exchange capacity, and heat medium parameters.

Each time a fluid passes through a tube bundle, it is called a tube pass; Each pass through the shell is called a shell pass. The diagram shows the simplest single shell and single tube heat exchanger, abbreviated as Type 1-1 heat exchanger. To improve the fluid velocity inside the pipe, baffles can be installed inside the two ends of the pipe box to divide all pipes into several groups. In this way, the fluid only passes through a portion of the tube each time, so it travels back and forth multiple times within the tube bundle, which is called a multi tube pass. Similarly, to increase the flow velocity outside the pipe, longitudinal baffles can also be installed inside the shell to force the fluid to pass through the shell space multiple times, known as multiple shell passes. Multi tube and multi shell processes can be used in conjunction.