Maintaining method for circulating fluidized bed

Abstract

The invention discloses a maintaining system and a maintaining method for a circulating fluidized bed. The maintaining system comprises a central control unit and a plurality of maintaining devices. Each maintaining device comprises an drying furnace (8) and a maintaining controller (5), a pipeline connected with an oil gas inlet (1) is provided with an oil gas flow switch (6), a pipeline connected with a cold air inlet (2) is provided with a cold air flow switch (13), the oil gas flow switch (6) and the cold air flow switch (13) are connected with the maintaining controller (5), and a temperature sensor (10) is connected with the maintaining controller (5). The maintaining system is simple in structure, small and exquisite in size, convenient to move and wide in applied range. In the maintaining process, automatic control of a temperature and a warming speed are achieved, the aims of drying, vitrifying and solidifying a furnace lining are achieved, potential running hazards are effectively avoided, time is saved by 2 / 3 in comparison with a traditional maintaining method, a power plant can generate electricity 10-15d earlier than planned, and the maintaining cost is reduced by 20%-50% in comparison with the traditional maintaining method.

Description

technical field [0001] The invention relates to a circulating fluidized bed maintenance system and a maintenance method. Background technique [0002] Circulating fluidized bed boiler technology is a high-efficiency, low-pollution and clean combustion technology that has developed rapidly in recent decades. This technology has been widely used in power plant boilers, industrial boilers and various kilns. The development of large-scale circulating fluidized bed boilers with a scale of several hundred megawatts. The high temperature and strong wear in the furnace determine the importance of laying a refractory and wear-resistant lining (referred to as lining) inside the circulating fluidized bed boiler. The quality of the lining is one of the key factors to ensure the long-term reliable operation of the circulating fluidized bed. In addition to its material characteristics, construction technology and other factors, the quality of the lining depends largely on its oven techno...

AI Technical Summary

Problems solved by technology

[0004] The traditional circulating fluidized bed boiler oven method usually adopts the method of "wood baking + boiler main oil gun". This oven method not only takes a long time (15-20 days of oven time), but also consumes a lot of wood and fuel oil. , and due to the defects of this oven method itself, the heating of the lining at various parts is extremely uneven, the temperature rise and fall speed is also difficult to control, and the quality of the oven cannot be guaranteed.

With the increase of boiler capacity, these problems are particularly prominent. It can be said that the traditional "wood baking + boiler main oil gun" oven method can no longer meet the requirements of large circulating fluidized bed boiler lining oven.

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