Spiral tube heat exchanger:

Adopting a wrapped elastic tube bundle design, the purpose is to increase the length of the tube side, thereby increasing the heat transfer area. The wrapped tube heat exchanger can be divided into single tube plate, double tube plate structure, single flow process, and multi flow and structure. Our company has specially designed electric heating and steam heating forms for users to choose from. The winding tube heat exchanger mainly relies on the design and manufacturing of the winding tube, and the swirl angle is the most critical element in the design of the tube bundle. Designing a reasonable helix angle can ensure that the linear travel of the heat exchange tube is within the design range; The coordination between the number of wrapped heat exchange tubes in each layer and the helix angle can ensure that the length of the heat exchange tubes is consistent.

The elastic tube bundle design eliminates the pulling force between the tube plate and the tube bundle. In the field of steam water and even cryogenic heat exchange, there will be a large amount of stress during the thermal conduction process, which conventional equipment often cannot eliminate by itself, while elastic tube bundles can easily cope with.

The tube bundle design of conventional shell and tube heat exchangers is not as complex. Different from conventional shell and tube heat exchangers with straight tube cores, the elastic tube bundles of heat exchangers rely on precise control of the forming equipment. Under the condition of consistent control of the helix angle, they are wound in reverse layer by layer according to the number of tube bundles, ensuring uniform tube spacing and layer spacing, thereby forming a network of intersecting heat exchange tubes. Thanks to the network crossing of the tube bundle, the turbulent flow field of the fluids on both sides is simultaneously amplified and enhanced, resulting in an increase in the thermal conductivity film coefficientKThe value will also be correspondingly increased. These are the advanced features of the wrapped elastic tube bundle design for heat exchangers.

Cold bending forming treatment of tube bundles:

The difficulty of cold bending stainless steel thin-walled tubes is relatively high, and the ideal state for tube bundle processing is as follows: under the premise of reasonable balance of tube bundle hardness and plasticity, there will be no excessive stress points, let alone the phenomenon of tube collapse. Our process perfectly meets this requirement. The spacing between pipes is the foundation for ensuring uniform distribution of refrigerant. It is difficult to achieve uniform spacing between pipes in elastic tube bundles, which requires complete technology and rich experience. The self-developed cold formed tube core winding unit for heat exchangers can achieve this fundamental goal by controlling multiple forming points.

We offer multiple options for heat exchange tubesΦ8、Φ10、Φ12、Φ19Waiting for heat exchange tubes of various diameters.

We have designed nearly a hundred different types of products with different fluxes, areas, and processes based on the application characteristics of various industry processes, by separately proportioning the spiral angle and the number of tube bundles. The comprehensive management of process subdivision and dynamic control will ultimately depend on the operator for product quality. We have subdivided the process flow of the winding heat exchanger, developed almost stringent internal control standards, and carried out process operations based on these standards. Dynamic management requires a change in production management concepts to avoid loopholes such as human negligence in processes, standardize software and personnel, and use this to achieve expected quality, which is particularly important.

The main components of a coiled tube heat exchanger:

Tube bundle form: winding elastic tube bundle

Pipeline interface: one-way multi-layer pipe box, flange connection

Shell side interface: branch pipe, flange connection

Cleaning interface: Shell cleaning (branch pipe, flange connection)

Material: Heat exchange tube--ANSI 316L

tube sheet--ANSI 316L

Cylinder, pipe box and flange--stainless steel304

Heat exchange area:1.2-45m2

Design temperature:350℃

Design pressure:1.6MPa

Scope of application: General heat exchange equipment, suitable for heating, cooling or condensing processes of single or single batch materials. Such as HVAC heating systems and fine chemical synthesis condensation systems.

Physical picture:

Appearance of coil heat exchanger: