Q: What medium parameters should be confirmed first when selecting a shell and tube heat exchanger?
A: Before selection, the chemical composition, operating temperature, and flow velocity of the media on both the tube side and shell side must be clarified. Medium corrosiveness determines the materials of the shell and tube bundle; temperature affects the allowable stress of materials and the thermal expansion compensation method; flow velocity relates to pressure drop and heat transfer efficiency. During procurement, it is recommended to obtain basic data such as medium composition, inlet temperature, and allowable pressure drop from the process department.
Q: How should the tube bundle length and baffle spacing be determined?
A: Structural parameters are usually derived backward from the allowable pressure drop. Under the premise of meeting the heat transfer load, adjusting the tube bundle length and baffle spacing can keep the shell-side pressure drop within the process allowable range. The GCH-240 model uses Φ19×2 heat exchange tubes in a triangular arrangement with a tube pitch of 25 mm, making it easy to arrange sufficient heat transfer area under a given shell diameter while accommodating cleaning and pressure drop requirements.
Q: What are the considerations for material selection and on-site installation?
A: The materials of the shell and tube bundle are selected according to medium corrosiveness, commonly using carbon steel, stainless steel, etc. During installation, space must be reserved for tube bundle extraction to facilitate later cleaning and maintenance. After the equipment is in place, the nozzle orientation and support positions should be checked to ensure correct alignment with the piping system.
Q: What operating conditions is the GCH-240 model suitable for? What are the key points of daily maintenance?
A: This type of heat exchanger can be used in industrial cooling water systems, oil cooling, and general process heat exchange applications. Key maintenance points include regularly checking the tube bundle for scaling and corrosion, scheduling cleaning based on pressure drop changes, and maintaining proper clearance between baffles and the tube bundle. During procurement, the heat transfer area and pressure drop parameters can be verified against the operating conditions.
