System and method for detecting atmosphere components in rotary hearth furnace in real time and optimally controlling combustion
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A real-time detection and combustion optimization technology, which is applied in combustion methods, combustion control, and fuel supply regulation. Combustion efficiency and guaranteed cleaning effect
Pending Publication Date: 2017-11-03
宝武集团环境资源科技有限公司
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[0003] At present, domestic and foreign rotary hearth furnaces use gas, air flow and temperature feedback to control the furnace combustion. Operators can only optimize the combustion environment according to the temperature in the furnace, and cannot obtain the CO produced by the high-te
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[0050] Example one
[0051] In this embodiment, the present invention provides a system for real-time detection of atmosphere components in a rotary hearth furnace and optimization control of combustion. The system mainly includes:
[0052] Combustion controller (such as PID controller), used to control the combustion environment in the rotary hearth furnace;
[0053] The pneumatic advance and retreat device 3 is fixed on the side wall of the rotary hearth furnace 1. The pneumatic advance and retreat device 3 has a sliding guide rail, an air cylinder and a propeller, and the propeller is pushed by the cylinder to slide back and forth on the sliding guide rail;
[0054] The composite probe 4 is installed on a sliding guide rail. The composite probe 4 can reciprocate on the sliding guide rail and extend into the rotary hearth furnace 1 through the through hole on the side wall of the rotary hearth furnace 1 to monitor the atmosphere in the rotary hearth furnace 1 Ingredient data;
[0055...
Example Embodiment
[0074] Example two
[0075] In this embodiment, the present invention provides a method for real-time detection of the atmosphere composition in a rotary hearth furnace and optimization control of combustion, such as figure 2 As shown, including the following steps:
[0076] Collect temperature data, CO content data, O 2 Content data, CO 2 Content data
[0077] Process the collected CO content data, and remove data below 0 and greater than 70%;
[0078] To the collected O 2 The content data is processed, and data below 0 and greater than 25% will be eliminated;
[0079] For collected CO 2 The content data is processed, and data below 0 and more than 30% will be eliminated;
[0080] Process the collected temperature data, and remove data below 0 and greater than 1400°C;
[0081] Calculate the air-fuel ratio in the rotary hearth furnace, air-fuel ratio = the amount of air entering the rotary hearth furnace: the amount of gas entering;
[0082] According to the formula theoretical air volume...
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Abstract
The invention provides a system and method for real-time detection of atmosphere components in a rotary hearth furnace and combustion optimization control, including: a pneumatic advance and retreat device; a composite probe, which can move back and forth on a sliding guide rail and extend into the rotary hearth furnace It is used to monitor the data of the atmosphere composition in the rotary hearth furnace; the gas source box is used to control the gas source of the cylinder to push the composite probe to move on the slide rail, and to detect the gas source pressure of the cylinder; the instrument host is used to send Control instructions to the gas source box and composite probe to control the movement of the composite probe on the slide rail and collect the monitoring data of the composite probe; PLC controller is used to optimize the control of the combustion model according to the monitoring data received by the instrument host, And send instructions to the combustion controller to optimize the combustion conditions in the rotary hearth furnace. The invention detects various data in the rotary hearth furnace through a composite probe, and integrates all the data to adaptively optimize the combustion environment in the rotary hearth furnace and improve combustion efficiency.
Description
technical field [0001] The invention belongs to the field of iron-containing solid waste recycling control, and specifically relates to a real-time detection system for the atmosphere composition in a rotary hearth furnace and a combustion optimization control method. Background technique [0002] The direct reduction process of carbon-containing pellets in a rotary hearth furnace is very complicated. Carbon-containing pellets are a system in which many substances coexist and interact with each other, involving complex physical and chemical changes. After the raw material and binder are mixed and pressed, they are dried and transported to the hearth of the rotary hearth furnace. With the rotation of the bottom of the furnace, the charge passes through the heating zone and the reduction zone in turn, and more than 85% of the iron oxides are reduced. A large number of studies have shown that the carbon-oxygen ratio and air-fuel ratio are the most important factors affecting th...
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