In the circulating water cooling unit of a chemical plant, operators noticed that the heat exchanger outlet temperature had been higher than the set value for several consecutive days, and the parameters still could not stabilize after adjusting the valve opening. After shutdown and inspection, scale and fibrous blockages were found in the flow channels between the plates, the cross-section of some channels was reduced, and the heat exchange area could not effectively participate in the exchange. This phenomenon is not an isolated case. When the deviation exceeds the set range, it is necessary to systematically investigate blockage, scaling, or internal leakage, rather than simply adjusting operating parameters.
The above situation is often related to insufficient consideration of medium characteristics, installation space, and maintenance convenience during the selection stage. The plate-frame fin heat exchanger structurally combines the compact layout of a plate heat exchanger with the enhanced heat transfer characteristics of fins. However, if the fin material does not match the corrosiveness of the medium, or if insufficient clearance is reserved for pulling out the frame plates, subsequent cleaning and maintenance will be difficult to carry out, and parameter deviations will recur. The nameplate should clearly indicate the design pressure, design temperature, heat exchange area, and medium flow direction, so that inspection personnel can check the operating status accordingly and detect abnormalities early.
The BRF-70 plate-frame fin heat exchanger is designed for the above scenarios: the fin material can be selected from carbon steel, stainless steel 304, or 316L according to the corrosiveness of the medium; the heat exchange area is determined by calculation based on heat load and temperature difference; the frame plate pull-out distance is calculated during the installation space confirmation stage to facilitate routine maintenance. The equipment flange standard and pressure rating are consistent with the on-site pipeline, reducing modification work. If parameters continue to deviate during operation, the blockage, scaling, or internal leakage location can be identified by comparing item by item according to the medium flow direction and design parameters.
This model is suitable for chemical circulating water cooling, HVAC systems, and general industrial cooling units, and is especially suitable for occasions with limited installation space and requiring regular sampling inspection and cleaning. The design pressure and temperature range are subject to the nameplate markings, and selection must be comprehensively confirmed in combination with medium characteristics and heat load conditions.
