According to different traditional methods, heat exchange equipment can be divided into three categories:
1. Hybrid heat exchangers
Use the direct energy and mixing of cold and hot fluids to exchange heat. This type of exchanger has a simple structure, but is cheap and is often made into a tower shape.
Two media that are allowed to be completely mixed and have different temperatures complete their heat transfer during direct contact. For example: cold water tower (cooling tower), granulation tower, air drying device, fluidized bed, etc.
2． Regenerative heat exchanger
In this type of heat exchanger, energy transfer is accomplished through a regenerator such as checker bricks or filler. First, let the hot fluid pass through and store the heat in the heat storage body, and then let the cold fluid pass through and take away the heat. Since the two fluids alternately convert input, it is inevitable that a small part of the fluids will mix with each other, causing "contamination" of the fluids.
Regenerative heat exchangers are compact in structure, cheap in price, and have a large heat transfer surface per unit volume, so they are more suitable for gas-to-gas heat exchange situations. Mainly used for raw material gas conversion and air waste heat in petrochemical production. The structural feature of the rotary regenerative heat exchanger is to achieve continuous operation. The regenerator in the heat exchanger is generally installed in a fan-shaped cabinet assembled with molded plates or wire mesh. The outside is sealed by a metal shell and is divided into two parts. Turn 1 to 4 to rotate slowly for continuous heat exchange.
3. Partitioning wall heat exchanger
The so-called dividing wall heat exchanger refers to a space where two fluids of different temperatures are separated by a fixed wall (called a heat transfer surface). Flows inside, and heat is transferred through heat conduction on the wall surface and convection heat transfer on the wall surface. The fluids participating in the heat exchange will not mix, and the transfer process proceeds continuously and stably. The heat transfer surface of the dividing wall heat exchanger is mostly made of metal with good thermal conductivity. In some cases, due to the need for anti-corrosion, non-metallic materials (such as graphite, polytetraethylene, etc.) are also used. This is the most widely used type of heat exchanger in industrial manufacturing. The cold and hot fluids are separated by a solid wall and conduct heat transfer through the wall.
It is better to recommend a high-efficiency double-spiral heat exchanger! As far as I know, phnix