Transformation Of Dingzhou Power Plant Coal Mill And Oil Gun Ignition System

The demand for electricity is increasing rapidly in recent years. And coal resources are abundant, oil resources are relative shortage in our country. One of our country’s important energy policy is coal instead of oil. Increasing of thermal power installed capacity exacerbates demand for oil, prompting an increase in fuel costs of power generation enterprises. Saving fuel oil is important, so installing oil-less ignition devices has become an inevitable choice. Tiny oil gun ignition is the latest fuel-saving technology based on that the START/STOP operation and low-load stable combustion of thermal power plants consume lots of oil resource.Shenhua Hebei Guohua Dingzhou Power Co., Ltd when fired boiler coal quality is poor,5 coal mill are invested can not meet the amount of coal required for the unit at full load, which threat the unit safe and stable operation. To ensure the effect of small oil gun ignition, the coal mill pulverizing system transformation is conducted firstly. Coal mill transformation plan is developed to increase output, partial reconstruction of the coal mill interior is conducted, focused on the transformation of wearing parts and the increase in the size of wear parts (roller sleeve, lining). Each unit upgrade two coal mill, which output increased 12t/h, the frequency and operation duration of backup coal mill reduced, so as the unit power consumption, the operational reliability of pulverizing system improved. From power economic considerations, increasing coal mill output transformation one-time investment cost 116,000 yuan more than the previous transformation, and due to the replacement of consumable parts for long life, year on year maintenance costs and parts costs can save 1/4, within maintenance cycle cost savings of a single is about 23 million, taking into account the power consumption, about 1.8 years to recover investment in upgrading. The transformation achieved the desired purpose.Meanwhile, in order to respond to national energy conservation policy, small oil gun ignition system transformation project is launched, existing boiler ignition system reforms into a gasification small oil gun ignition system. Transformation plan of the burner arrangement, fuel systems, compressed air systems, the primary air heating system and an ignition control system are described in detail. After debugging and running, boiler boost heating process、operating characteristics of the burner and changes in coal combustion efficiency or other parameters during ignition startup are analyzed after the small oil gun ignition system transformation. Performance test results show that implementation of the technology solves the problem of a large number of oil in boiler units, significantly reduces fuel consumption during boiler ignition start, shutdown and stable combustion, saving more than 90%. Each time start can save cost 1.56 million yuan comparable to the previous, which reduces business operating costs, creates tremendous benefits for enterprises. Thus, the small oil gun ignition system transformation project get a complete success.