Unlock instant, AI-driven research and patent intelligence for your innovation.

A Method of Improving the Stability of the Ventilation System of a Sintering Machine

A ventilation system and sintering machine technology, applied in the field of ironmaking production, can solve problems such as the utilization of unfavorable heat, fluctuations in the negative pressure of the sintering system, and the impact on the permeability of the material layer, so as to facilitate reuse, increase the temperature of exhaust gas, and improve stability. Effect

Active Publication Date: 2019-10-29
ANGANG STEEL CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the ventilation system of the sintering machine generally uses one exhaust fan to act on the entire sintering process. This kind of single fan ventilation system is likely to cause instability in the sintering process. For example, the failure of the fan causes the sintering machine to stop production; the ash discharge of the sintering machine head causes the negative pressure of the entire sintering system. Fluctuation affects the air permeability of the material layer; the entire flue is connected, which reduces the temperature of the tail gas of the sintering machine, which is not conducive to the utilization of residual heat; on the other hand, one fan acts on the entire sintering process, which is also not conducive to the segmental adjustment of the sintering negative pressure

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Method of Improving the Stability of the Ventilation System of a Sintering Machine
  • A Method of Improving the Stability of the Ventilation System of a Sintering Machine
  • A Method of Improving the Stability of the Ventilation System of a Sintering Machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The method to improve the stability of the exhaust system of the sintering machine is to control the exhaust system of the sintering machine in sections. The total length of the sintering machine is 96m, and there are 22 air boxes 10; in 12 to 22 air boxes of the sintering machine, 4 thermocouples are installed in each air box , where there is one thermocouple on the top of the bellows, two thermocouples in the middle of the bellows, and one thermocouple at the bottom of the bellows. The average value of the temperature measured by the thermocouples is used as the flue gas temperature of the corresponding bellows, as shown in Table 1.

[0029] Table 1 Windbox flue gas temperature / ℃

[0030]

[0031] The scatter diagram of the distance from the bellows to the nose and the corresponding bellows temperature, such as figure 2 As shown; polynomial fitting is performed on the scatter diagram, and the fitting curve between the distance from the bellows to the nose and the co...

Embodiment 2

[0037] The method to improve the stability of the exhaust system of the sintering machine is to control the exhaust system of the sintering machine in sections. The total length of the sintering machine is 108m, and there are 23 air boxes 10; in 12 to 23 air boxes of the sintering machine, 5 thermocouples are installed in each air box , taking the average value of the temperature measured by the thermocouple as the flue gas temperature of the corresponding wind box, as shown in Table 2.

[0038] Table 2 Windbox flue gas temperature / ℃

[0039]

[0040] The scatter diagram of the distance from the bellows to the nose and the corresponding bellows temperature, such as image 3 As shown; polynomial fitting is performed on the scatter diagram, and the fitting curve between the distance from the bellows to the nose and the corresponding bellows temperature is obtained:

[0041] Y=4905.7028-186.63474×X+2.31232×X 2 -0.00901×X 3 (R 2 =0.99607) (2)

[0042] Among them, R in the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for improving the stability of a sintering machine exhausting system. The typical position of sintering machine air bellow temperature changes is obtained through measurement and calculation, a flue separation plate is arranged at the position, and sectional independent control of the exhausting system is achieved. Independent exhausting fans are correspondingly and optimally arranged at different stages, the sintering negative pressure can be conveniently controlled according to the sintering reaction process needs, and the influence of machine head and tail discharging ash on the sintering process is reduced. The temperature of machine tail flue waste gas is increased, and reutilization of high-temperature waste gas is convenient. Shutdown caused by exhaust fan faults is reduced, and the stability of the sintering exhausting system is improved. Compared with the prior art, the method has the beneficial effects that the sintering negative pressure canbe conveniently controlled according to the sintering reaction process needs, and the influence of the machine head and tail discharging ash is reduced; the temperature of the machine tail flue wastegas can be increased, reutilization of the high-temperature waste gas is convenient, shutdown caused by the exhaust fan faults is reduced, and the stability of the sintering exhausting system is improved.

Description

technical field [0001] The invention belongs to the technical field of ironmaking production, relates to sintering production technology, and in particular relates to a method for improving the stability of an exhaust system of a sintering machine. Background technique [0002] Sintering is to spread the mixed material from the distributor to the sintering trolley, and then draw air to ignite, and ignite the fuel in the sintered mixed material layer from top to bottom, so that the process of agglomeration and mineralization continues, and finally the finished sintered ore is sintered. More than 90% of the pollutants produced in the sintering process are concentrated in the flue gas of the large sintering flue, but in addition to the pollutants, the large flue also contains some high-temperature flue gas with high utilization value, and its maximum temperature is above 500°C. The oxygen content is about 19%. At present, most manufacturers discharge this part of high-temperat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F27B21/14F27D19/00
CPCF27B21/00F27D19/00F27D2019/0009F27M2003/04
Inventor 张辉夏铁玉周明顺刘帅李志斌翟立委刘杰徐礼兵张飞宇孙雷
Owner ANGANG STEEL CO LTD