Shell and tube heat exchanger upgrading

The heat exchanger is the main equipment in the petrochemical, metallurgy, electric power and other industries. Its level of design and manufacturing is directly related to the effect of heat transfer and affects energy consumption. At present, shell-and-tube heat exchangers account for about 70%-80% of all heat exchangers in China, and petrochemical heat exchangers account for more than 40% of all equipment. The majority of domestic and foreign shell-and-tube heat exchangers are still using vertical bow baffle structure, which has the disadvantages of large flow dead zone, large resistance of shell-side flow, and easy deposition, and the overall heat transfer efficiency of the heat exchanger. Low, short life cycle, it is easy to induce vibration noise of the tube bundle.

The continuous closed-flow non-central tube spiral baffle heat exchanger developed by Huadong Company allows the shell-side medium to pass through the shell-side flow channel in the form of an ideal spiral flow. Its innovations are reflected in three aspects: First, a self-contained closed spiral flow channel without a central tube is designed. Within a spiral stroke, two or more baffles form a continuous spiral group, and several spiral groups pass through the coupling. The plate connection forms a sealed spiral flow channel with the inner wall of the housing and the outer wall of the heat transfer tube, so that a truly full-closed spiral flow channel is formed in the shell process of the heat exchanger, thereby greatly increasing the degree of turbulence of the fluid and reducing the fouling. Improve the heat transfer efficiency; Second, the use of baffle technology to reduce heat loss; Third, the use of the overall anti-seismic technology, to further strengthen the heat exchanger tube bundle vibration resistance, extended equipment life. The heat exchanger obtained national invention patents and international invention patents.