In the styrene plant, an intermediate heat exchanger is required between the two reactors to raise the temperature of the second reactor. The internal structure of the heat exchanger is relatively complicated, and it has been operated under high temperature and negative pressure for many years, so stable production puts forward higher requirements on the heat exchanger.

The high-temperature heat exchangers we designed and manufactured have been used in many styrene factories for many years and have received unanimous praise. Their stable operation, high heat exchange efficiency, guaranteed long-term and stable production in the factory, have made great contributions to energy saving and consumption reduction.

The main advantages are as follows:

1. The heat exchange tube of the heat exchanger is designed reasonably, which effectively reduces the pressure drop of the system

2. Full scientific calculations and simulations have been made for stress analysis at high temperature to ensure long-term operation and durability

3. The heat exchanger has high efficiency, sufficient heat utilization, and obvious energy saving and consumption reduction effects

4. The heat exchanger is located in the middle of the two reactors, which shortens the length of the connecting pipe and effectively reduces the thermal cracking rate of materials and products

Heat exchanger structure diagram

Stress calculation and simulation analysis

The industrial device and DCS control interface are shown in the figure (the position is in the middle)

Industrial performance

Shandong Yuhuang Chemical Co., Ltd. 200,000 tons/year styrene project

120,000 tons/year styrene project of Shaanxi Yanchang Petroleum (Group) Co., Ltd. Refining and Chemical Company

250,000 tons/year styrene project of Changzhou Xinri Chemical Co., Ltd.

Shandong Hengyuan Petrochemical Co., Ltd. 60 thousand tons/year styrene project

5000t/year divinylbenzene project of Jiangsu Evergreen Chemical New Material Co., Ltd.

Abel Chemical (Jiangsu) Co., Ltd. 250,000 tons/year styrene project