In order to achieve some measures taken in the two-rotation and two-suction process under low concentration conditions, a large refractory brick spherical arch is used as a support structure in the converter. This structure can effectively increase the heat storage capacity of the converter, and the system has a strong adaptability to the fluctuation of the concentration. B1 heats the outlet pipe of the sulfur dioxide fan, effectively utilizing part of the heat generated by the compression of the gas. All external thermal insulation adopts the structure of aluminum silicate board to wrap the aluminum skin. The thickness of the insulation layer of the main equipment is up to 300mm, and the insulation layer of the other pipelines is also thicker than 150mm. The flue gas pipeline entering and leaving the suction tower and the second suction tower is insulated. . C1 a suction adopts high-temperature absorption process: the acid temperature of the input tower is 9095e, the temperature of the tower acid is 100110e, the temperature of the tower is 200250e, and the temperature of the tower is 90110ed1. b The hollow ring zoom tube heat exchanger developed by South China University of Technology is used, and the rest are double-round type heat exchangers. The two kinds of heat exchangers are mature in technology, high in heat transfer coefficient, and can effectively reduce the heat exchange area. The corresponding equipment specifications are small, and the surface heat loss can be reduced. E1 has added a gas heating system at the entrance of the second transfer. F1 adds a bypass line at the inlet and outlet of a suction tower. When the two-rotation and two-suction cannot operate normally, it can be switched to one-shot and one suction for production. In order to ensure the final conversion rate, the second conversion (fourth layer) uses the VK38 type catalyst produced by Topsøe of Denmark. H1 is to ensure the normal operation of the fan and improve the operating rate. The sulfur dioxide fan adopts the SF01-14 centrifugal fan produced by KKK of Germany, and the 6SE8026 SIMOVERTMV variable frequency speed control device produced by German SIMENS company is used to adjust the air volume, which can save energy and energy. Low load start-up can be achieved, reducing the adverse effects on the grid and motor. I1 retains the exhaust gas recovery system to control the emission of sulfur dioxide from the exhaust gas when production is abnormal. Except for the sulfur dioxide fan and some instrument imports, the rest are domestic equipment. The preheating system, absorption equipment, drying equipment, etc. all use the original equipment.
After the transformation of the plant, it was put into operation from December 11, 2000 to the end of March 2001, and a total of sulfuric acid was produced.
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