System and method for optimizing combustion of rotary hearth furnace
A technology of combustion optimization and rotary hearth furnace, which is applied in the field of combustion optimization system of rotary hearth furnace. The effect of life and productivity improvement
Pending Publication Date: 2018-11-27
上海科麟沃环境科技有限公司
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Problems solved by technology
[0008] In order to solve or partially solve the above-mentioned technical problems, an embodiment of the present invention proposes a combustion optimization system for a rotary hearth furnace, aiming at a large amount of CO contained in the flue gas escaping from the rotary hearth furnace, and the gas enters the flue and contacts with air for oxidative combustion, resulting in The problem of high flue temperature reduces the CO content of the flue gas entering the flue of the rotary hearth furnace. On the one hand, it significantly improves the waste heat utilization rate of the rotary hearth furnace. Medium and low melting point substances melt and stick, block the flue of the settling chamber, and reduce production efficiency and energy utilization
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[0044] The principle and spirit of the present invention will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are given only to enable those skilled in the art to better understand and implement the present invention, rather than to limit the scope of the present invention in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
[0045] The embodiment of the present invention provides an optimized combustion system of a rotary hearth furnace, so that the flue gas of the rotary hearth furnace can be fully combusted in the preheating zone before entering the flue. Such as figure 1As shown, the inner cavity of the rotary hearth furnace is divided into zone I-distributing zone, zone II-preheating zone, zone III-reducing zone and zone IV-discharging zone according to the direction of mate...
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The embodiment of the invention provides a system and a method for optimizing combustion of a rotary hearth furnace. The rotary hearth furnace comprises a material-distributing area, a preheating area, a reduction area and a discharging area in turn along a rotating direction of hearth. The system comprises a plurality of air-supplementing nozzles which are uniformly arranged at the tail furnace top in the preheating area and are used for supplying combustion-supporting gas. The air-supplementing nozzles with special structures are adopted by the invention for optimizing the combustion reaction, so that the rotary hearth furnace technology is guaranteed, and meanwhile, the exhaust gas of rotary hearth furnace before entering into a flue is fully combusted in the preheating area, the low-melting point substances in dust in the gas becoming molten and sticky and blocking a settling chamber caused by the gas burning in the flue can be prevented, and the heat use rate is increased.
Description
technical field [0001] The invention relates to the field of chemical industry, in particular to a combustion optimization system and method for a rotary hearth furnace. Background technique [0002] This section is intended to provide a background or context for implementations of the invention that are recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] With the rapid development of non-blast furnace smelting technology, supporting coal-based direct reduction equipment such as rotary hearth furnace, roof furnace, tunnel kiln, and rotary kiln have appeared. Among them, the rotary hearth furnace has no special requirements on the strength of the charge itself, and because of its advantages of short process, low energy consumption, low investment, flexible operation and stable operation, it is widely used in processing various composite ores, low-grade complex refractory ores and Metallurgical ferrous solid ...
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IPC IPC(8): C21B13/10
CPCC21B13/105
Inventor 倪明德
Owner 上海科麟沃环境科技有限公司