Flue gas waste heat recovery boiler of rotary hearth furnace
A waste heat boiler, flue gas waste heat technology, applied in steam boilers, steam boiler accessories, steam boiler components and other directions, can solve the problems of low boiler heat transfer effect, unstable boiler operation, easy ash accumulation in boiler operation, etc. The effect of light weight, saving initial investment and compact boiler structure
Inactive Publication Date: 2012-04-11
JIANGSU DONGJIU HEAVY IND
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Problems solved by technology
[0005] Aiming at the deficiencies of the prior art, the present invention provides a flue gas waste heat recovery boiler for a rotary hearth furnace, which solves the problem of low heat transfer effect due to ash accumulation, easy ash accumulation in boiler operation and poor boiler operation with reasonable system layout and structural design. Stability and other issues
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[0020] The accompanying drawings disclose, without limitation, the structural schematic diagrams of the preferred embodiments involved in the present invention; the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0021] Such as Figures 1 to 5 As shown, the flue gas waste heat recovery boiler of the rotary hearth furnace of the present invention includes a waste heat boiler body 1, the waste heat boiler body 1 adopts a horizontal structure with horizontal flushing channels, and the waste heat boiler body 1 is sequentially divided according to the flow direction of the flue gas. The body is set as the pre-evaporation area, superheating area, post-evaporation area and soft water heating area, and the front evaporators are respectively installed in the flue gas channels of the pre-evaporation area, superheating area, post-evaporation area and soft water heating area 2. The superheater 3, the rear evapo...
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The invention discloses a flue gas waste heat recovery boiler of a rotary hearth furnace, which comprises a waste heat boiler body. The waste heat boiler body adopts a horizontal flushing channel horizontal structure and is sequentially and separately divided into a front evaporation area, an overheating area, a back evaporation area and a rear low-temperature heating surface according to the flow direction of flue gas. Meanwhile, the rear low-temperature heating surface is divided into two parallel soft water heating areas, and the flue gas is input to the two soft water heating areas alternatively after output from the back evaporation area; and a front evaporator, an overheater, a back evaporator and soft water heaters are correspondingly arranged in flue gas channels of the front evaporation area, the overheating area, the back evaporation area and the two soft water heating areas. Therefore, the invention solves the problems of bad heat transfer effect due to dust accumulation, easy dust accumulation and operating instability of the boiler through reasonable system layout and structure design.
Description
technical field [0001] The invention relates to a waste heat recovery boiler, which is used for waste heat recovery of flue gas of a rotary hearth furnace. Background technique [0002] Steel mills contain a large amount of iron-containing dust, which are generally used as raw materials for other derivatives, such as raw materials for cement; with the development of science and technology, energy saving and emission reduction, and the development of circular economy, these dusts are used as raw materials for ironmaking In use, the rotary hearth furnace direct reduction iron system has also become a necessary process equipment for steel mills. [0003] During the operation of the rotary hearth furnace, a large amount of high-temperature flue gas is released, and the flue gas temperature is about 1200°C. This kind of flue gas has high economic value and is the first choice for waste heat power generation of flue gas. [0004] Due to the different ingredients of the raw materi...
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IPC IPC(8): F22B1/18F22B37/00F23J1/06
Inventor 刘祥斌陈长景张兰芳许荣政曹华杨成张杰许海军
Owner JIANGSU DONGJIU HEAVY IND