Main introduction of sleeve heat exchanger　

A sleeve type heat exchanger is formed by connecting two standard pipes of different sizes into concentric sleeves, and then connecting them with multi-stage sleeves. Each part of the sleeve is called a track. The inner pipe of each pass is connected to the inner pipe of the next pass through a U-shaped bend, and the outer pipes are connected to each other. This type of heat exchanger usually has a large number of channels, arranged vertically and fixed on a pipe rack. If a large heat transfer area is required, several rows of wells can be connected to the main pipe.

During the heat exchange process, one fluid flows in the inner tube, while the other fluid flows in the annular gap between the sleeves. When the liquid is heated by steam, it enters the inner tube of the casing from below and flows through various parts of the casing from above in sequence. Steam enters the annular gap of the upper casing, and condensed water is discharged from the casing through the condensate drainage pipe.

The effective length of each tube in a jacketed heat exchanger is generally 4-6m. If it is too long, the tube will bend downwards, resulting in uneven fluid distribution in the annulus.

The advantage of this utility model is that the sleeve type heat exchanger is composed of standard pipes and fittings, with a relatively simple structure and no need for processing and manufacturing. Due to the flexibility of the number of rows and procedures, they can be added or removed arbitrarily. Proper selection of the diameters of the inner and outer pipes can increase the flow velocity of the fluid, create strict counterflow between the two sides of the fluid, and increase the heat transfer coefficient.

Its drawbacks are:

(1) Large volume, occupying a large area,

(2) Many joints are prone to leakage;

(3) Difficulty in cleaning pipeline gaps;

(4) The heat transfer area is limited.

Sleeve type heat exchangers are mainly suitable for situations where heat transfer is required, but the product requirements are not high and the heat transfer efficiency is high.