| Industrial kiln is widely applied in the field of metallurgy and construction materials, and it is a typical kind of clinker sintering equipment with high energy consumption. Waste heat recovery power generation is a significant technological method to improve the efficiency of energy utilization, achieve energy conservation and emission reduction. The subject of this paper is the design and implementation of the electrical system for dry-type cement kiln waste heat recovery power generation, aiming to search for the optimized design plan. The purpose is to guarantee the safe and reliable operation of the waste heat recovery power generation system and improve the economic efficiency.Based on the operation condition of two sets of rotary kilns in some cement plant, with capacity of 4260t/d and 4500t/d respectively, this paper designed a system of waste heat recovery power generation with capacity of 18MW. Firstly, based on the production condition of the kilns, a feasible overall technical proposal for waste heat recovery power generation has been made including the installed capacity, thermal system, and main equipments selection. Secondly, based on the calculation of the system short circuit current, the high voltage electrical drawings for the waste heat recovery system has been designed, to achieve the protection for the generator and the transformer; meanwhile, the low voltage system loading and the transformer capacity has been designed to achieve the power distribution protection for the equipments. Thirdly, the TCS and MCS have been configured through the Siemens STEP7 software. The program achieves the function of startup and shutdown of the equipment unit with one key. With this one key start-stop control system for the domestic equipment unit, the operation cost has been further reduced. The good performance result for this waste heat recovery power generation system has proved the correctness and effectiveness of the electrical design and software development in this paper. Regarding the problem of shortage in power generation during operation, research analysis has been made and a feasible improvement proposal has been provided.This paper provides a feasible technological implementation plan for the electrical drawings design and MCS software configuration programming of waste heat recovery power generation system, which is of high value of reference and practical significance. |
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