On-site procurement personnel often encounter tube bundle corrosion and abnormal pressure drop after the heat exchanger is put into operation. In response to selection questions, the following is explained in a Q&A format.
A: If chloride ions exceed 200 mg/L, ordinary carbon steel or 304 stainless steel may undergo pitting corrosion, so duplex steel tube bundles are recommended. Actual operating conditions often deviate, and after parameters are confirmed, correction is still needed based on operating data.
A: It is necessary to clarify the heat load, flow rate, inlet and outlet temperatures, and allowable pressure drop. The HXL-90 shell and tube heat exchanger provides parameters such as heat exchange area and tube-side and shell-side materials. The above is for reference in selection calculations, and actual use needs to be combined with the system heat load and safety margin.
A: Reasonably design the baffle spacing and tube bundle arrangement, and reserve cleaning space. Regularly inspect scaling and corrosion conditions, and adjust the operating strategy in a timely manner.
