When selecting plate-and-shell heat exchangers, engineers often compare them with removable plate and shell-and-tube options. The BRQ-195 is an intermediate specification, positioned as a compromise between performance and cost, and its maintenance approach differs from both alternatives. The following provides an objective explanation from the perspective of maintenance and operating boundaries for design selection reference.
Removable plate heat exchangers rely on gasket sealing; after long-term operation, gasket aging may cause leakage and requires periodic replacement. The BRQ-195 plate-and-shell heat exchanger uses a welded plate bundle structure with a gasket-free design. Under normal operating conditions, there is no periodic maintenance item for gasket aging and replacement, which helps reduce the risk of unplanned downtime in continuous operation scenarios such as HVAC and chemical processes. Note that the welded plate bundle cannot be opened plate by plate for mechanical cleaning like removable plate units. Media with a strong fouling tendency should be provided with chemical cleaning connections or pre-filtration, and media cleanliness and cleaning conditions must be confirmed during selection.
Shell-and-tube heat exchangers are mature in high-temperature, high-pressure, and large-flow applications, with maintenance mainly involving tube bundle cleaning and tube plugging. The BRQ-195 is relatively compact in volume for the same heat transfer area, making it suitable for scenarios with limited installation space. Its optional fully welded plate bundle structure extends the applicable temperature range to below 400°C and design pressure not exceeding 4.0 MPa, and it can be used for conditions such as steam heating of thermal oil and waste heat recovery. When outside this parameter range, shell-and-tube or other structural options should be evaluated first, and simple scale-up selection is not advisable.
In the initial operation period, it is recommended to record inlet and outlet temperatures, pressures, and flow rates to establish baseline data for subsequent judgment of plate bundle fouling or blockage. When pressure drop continues to rise, first check the filter and impurities on the media side, then arrange chemical cleaning according to media characteristics; the cleaning solution should be compatible with the plate material. During shutdown, pay attention to draining the media to avoid freezing of low-temperature media or long-term retention of corrosive media. Although the sealing structure is gasket-free, the flange connections still need periodic inspection of their tightening condition.
Before ordering, selection personnel should clarify media composition, allowable pressure drop, cleaning method, and installation orientation, and request plate bundle material, design parameters, and maintenance instructions from the manufacturer. Incorporating maintenance conditions into the selection comparison is more conducive to full-lifecycle operation management than simply comparing heat transfer area.
