Heat conduction oil and water vapor double-medium co-production circulating fluidized bed boiler

Abstract

The invention discloses a heat conduction oil and water vapor double-medium co-production circulating fluidized bed boiler. According to a traditional circulating fluidized bed boiler, on the basis ofarranging a water actuating medium radiant heating surface, a cyclone separator, a water actuating medium convection heating surface and an air pre-heater, a heat conduction oil radiant heating surface is additionally arranged in a hearth of the circulating fluidized bed boiler, and a heat conduction oil convection heating surface is additionally arranged in a tail flue. According to the heat conduction oil and water vapor double-medium co-production circulating fluidized bed boiler, the heat conduction oil heating surfaces are additionally arranged in the circulating fluidized bed boiler, sothat heat conduction oil heating and vapor producing are conducted simultaneously, the temperature of exhaust smoke of the boiler is reduced, the thermal efficiency of the boiler is improved, and theheat load of the single boiler is improved.

Description

technical field [0001] The invention relates to a heat-conducting oil heating boiler, in particular to a dual-medium cogeneration circulating fluidized bed boiler capable of heating heat-conducting oil and producing water vapor. Background technique [0002] Heat transfer oil is an organic heat carrier, which is an excellent heat transfer medium with low pressure and high temperature. Compared with steam and hot water medium, it has the characteristics of maintaining liquid state at high temperature (~400°C), large thermal conductivity, and easy temperature control. [0003] The current heat-conducting oil furnace mainly adopts combustion methods such as hand-fired grate, chain grate, and molded coal grate. These combustion methods not only need to burn high-quality bituminous coal, but also have low thermal efficiency, serious energy waste, and small heat load of a single boiler. [0004] If the water or steam in the heating surface of the existing steam-producing circulati...

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Problems solved by technology

[0003] The current heat-conducting oil furnace mainly adopts combustion methods such as hand-fired grate, chain grate, and molded coal grate. These combustion methods not only need to burn high-quality bituminous coal, but also have low thermal efficiency, serious energy waste, and small thermal load of a single boiler.

[0004] If the water or steam in the heating surface of the existing steam-producing circulating fluidized bed boiler is directly replaced by imported oil, although the heat load of a single boiler can be increased, the boiler still has high exhaust gas temperature and low thermal efficiency and other shortcomings

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