【Ten Years of Rapid Development in Chemical Processing Equipment】6.29–2019: Coiled tubular material inlet/outlet heat exchangers for 1.8 million tons per year of continuous processing units
Thread Content
Witnessing the decade-long rapid development of chemical processing equipment – praising the prosperous and strong China. Replies are rewarded; discussions are welcome. ------------------------------------------- On October 7, 2019, the 1.8 million tons per year continuous processing unit for the KEC (Guangdong) refining and chemical integration project, manufactured by Wuhan Donghai Petrochemical Heavy Equipment Co., Ltd., was successfully lifted into place; it is now in the final installation phase. This device is a coiled tubular material inlet/outlet heat exchanger that can replace large plate-type heat exchangers. With a weight of nearly 300 tons per unit and a heat exchange area of over 10,000 square meters, it represents a new advancement in the manufacturing level of large-scale integrated refining and chemical processing facilities in China.
Wish a prosperous and strong China.
The coiled tube heat exchanger is a new type of heat exchanger whose structure differs from that of the shell-and-tube heat exchangers widely used in current petrochemical plants. The heat exchange tubes of this heat exchanger are wound in a spiral pattern, with multiple layers of winding. Each layer is kept at a certain distance from the previous layer by spacing plates, with the winding directions between layers being opposite. Since the length of the heat exchanger within the housing can be increased, the size of the heat exchanger’s casing is reduced, thereby improving the heat transfer efficiency. In 1895, the Linde company in West Germany developed the coiled tube heat exchanger for the first time; at that time it was used only as equipment for industrial-scale air liquefaction. Soon after, the British company Hanfordson designed and manufactured a coiled tube spiral-type heat exchanger. Therefore, the coiled tubular heat exchanger is also known as a Linde Hampson heat exchanger. Linde’s coiled tubular heat exchanger consists of two concentric tubes twisted into a serpentine shape; high-pressure air is fed into the inner tube, while cold low-pressure air flows in counterflow through the gap between the inner and outer tubes. The heat exchanger used by Hanpuson consists of many tubes that are wound back and forth in a spiral pattern from the inside out, forming coiled tubes that are stacked on top of a central cylinder.