Air-coal mixed spraying automatic control system and method thereof
An automatic control system and mixed injection technology, applied in the furnace control device, furnace type, furnace and other directions, can solve the problems of coal injection operators affecting the temperature stability, difficult to achieve temperature stability, precise control, and the position cannot be controlled ahead of time, etc. Achieve the effect of improving the kiln tail temperature stability rate, reducing the kiln tail temperature fluctuation range and improving labor efficiency
Active Publication Date: 2012-09-05
SHOUGANG CORPORATION
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Problems solved by technology
[0005] 3) There are too many factors affecting heat balance and they change in real time. After temperature fluctuations occur, the cause and degree of temperature fluctuations cannot be accurately and timely judged, and then the adjustment amount of a given fuel can be judged
[0006] 4) For the impact of frequent adjustment of the air volume of the on-site heat-resistant fan and the first cooling section of the ring cooler on the temperature fluctuation, the post cannot be controlled in advance, and can only follow the compensation adjustment passively after the temperature fluctuates, resulting in temperature fluctuations
[0007] 5) The sense of responsibility of coal injection operators affects the stability of temperature
[0008] To sum up, the control of artificial fuel injection is affected by many factors, and it is difficult to achieve the ideal effect of stable temperature and precise control
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[0033] 1. Install an SPF rotor scale in the coal injection tower (the manufacturer is responsible for the installation, and the pelletizing factory cooperates). After installation, the manufacturer and the pelletizing factory will jointly adjust the parameters. The coal value is compared with the measured coal injection value of the bin, and different coal injection accuracy curves are collected according to different bin positions, and the coal injection measurement detection data and adjustment parameters after the bin position change are obtained until the SPF rotor scale measurement value meets the expected requirements.
[0034] 2. Replace the rotary kiln burner with HP-F type gas and solid dual-purpose burner, which meets the requirements of simultaneous mixed injection of gas and coal and the need for automatic adjustment of gas.
[0035]3. Lay signal cables for data transmission, and transmit data such as real-time monitoring temperature, air volume, material volume, ma...
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The invention discloses an automatic control system of mixed gas and coal spraying and a method thereof, and belongs to the technical field of automatic control of mixed gas and coal spraying. The automatic control system comprises a SPF rotary weighing scale, a flow meter, a thermoelectric couple, a Q18 electric weighing scale and a collecting subsystem of material index assay data; measuring and computing signals of the site instruments such as the SPF rotary weighing scale, the flow meter, the Q18 electric weighing scale and the thermoelectric couple are automatically collected and then transmitted into the control system through a data line, and the material index assay data is manually input into the control system; and a central processing unit of the control system implements computation processing according to collected site data and automatically controls the output volume of coal dust according to an allowed gas usage. The automatic control system of mixed gas and coal spraying and the method thereof realize target control, automatic control and stable control of the kiln outlet temperature of a rotary kiln and achieve the goals of optimizing pellet roasting process, controlling stable temperature, raising roasting efficiency, lowering job labor intensity and the like.
Description
technical field [0001] The invention belongs to the technical field of automatic control of gas-coal mixed injection, in particular to an automatic control system and method for gas-coal mixed injection, which is suitable for the automatic control of gas and coal in the fuel system in the chain grate-rotary kiln-circular cooler production process. monitoring and intelligent control. Background technique [0002] After the completion and operation of the Shougang Pellet Plant by using the coke-moving degassing gas project, the fuel injection method is manually controlled. The fuel injection is divided into two parts, with gas as the main part and coal as the supplementary part. That is, when the gas is insufficient or cannot meet the temperature control requirements Under the additional coal injection. The key points of the process operation are: firstly, the gas injection and coal quantity require a uniform and stable process, and secondly, the adjustment process should be ...
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IPC IPC(8): F27B21/14F27D19/00
Inventor 董伟田本昌杨金保朱辛州刘福来张旦张建明郭科研曹利民
Owner SHOUGANG CORPORATION