关键词: C4烷基化装置, 压缩制冷, 节能罐, 制冷量, 中间压力, ProⅡ软件, 计算验证, 压缩机功率

Abstract: In view of the current situation that the newly designed C4 alkylation unit adopts primary compression refrigeration, combined with the basic principle of compression refrigeration, according to the compression refrigeration process of C4 alkylation unit, through theoretical analysis and formula derivation of energy saving tank, it is proved that adding compression refrigeration energy saving tank in the compression refrigeration process of C4 alkylation unit can achieve effective energy saving. This method can not only reduce the power of the compressor by about 7.99% and the condensing load by about 2.18%, thus reducing the energy consumption of the alkylation unit by about 1.5 kg standard oil per ton of alkylation oil, accounting for about 1.4% of the total energy consumption of the alkylation unit, but also reduce the investment of the corresponding compressor and condenser. The process simulation calculation further verifies the energy saving effect of adding the compression refrigeration energy saving tank, and confirms that the optimal operating pressure of the compression refrigeration energy saving tank can be obtained through empirical formula and simulation calculation.

Key words: C₄ alkylation unit, compression refrigeration, energy saving tank, refrigerating capacity, intermediate pressure, ProⅡ software, calculation verification, compressor power