Trough-type liquid-seal blast cooling device and method for sinter

Abstract

A groove type liquid sealing air blast cooling device (1) for sintered ore comprises 1) a ring groove shaped piling box body which comprises an inner ring wall (2), an outer ring wall (3) and a complete-circle ring shaped tray (4) at the bottom part, 2) a wheel rail driving device (5) of a box body, 3) an annular hood (8) at the upper part of the box body, 4) at least one air exhausting pipelines (21, 22) connected to the top part of the hood (8), 5) a closed annular air feeding chamber (11) which is positioned at the inner side of the lower part of the box body, 6) a liquid sealing device (14) which is sealed relative to an inner ring box body wall (2) and an outer ring box body wall (3) of the rotating ring groove shaped piling box body, 7) a plurality of blast blowers (9), 8) one or a plurality of scraper devices (6) which are mounted at the inner side of a discharging section (1a) of the cooling device (1), and 9) a plurality of lower air feeding devices (K) which are positioned in the lower space of the box body and positioned above scrapers. The cooling device (1) has outstanding advantages on manufacturing cost, reduction of environmental pollution, and waste heat utilization.

Description

technical field [0001] The invention relates to a trough-type liquid-seal blast cooling device and a cooling method for sintered ore, and belongs to the fields of ironmaking and environmental protection. Background technique [0002] In the modern sintering process, "cooling" is one of the most critical processes. After the sintered ore has been roasted by the sintering machine, it has formed a high-temperature finished ore. How can it be protectively cooled without affecting its quality and yield, so that it can be sent to the finished product ore bin through a belt conveyor, and at the same time The perfect recovery and utilization of the sensible heat energy it carries has always been a problem that technicians in the industry have been constantly studying. Since the 1960s, the cooling process of sinter has been developed rapidly, which is mainly divided into three categories: belt cooling, ring cooling and disk cooling. In the late market competition, the strip cooling...

AI Technical Summary

Problems solved by technology

No matter which way you choose, it will cause a high investment cost, which is not cost-effective in terms of economic indicators;

[0007] 2) The open circulation of the air flow leads to low utilization rate of waste heat and pollutes the environment: Since the air flow of the "extraction type longitudinal plate cooling technology" is an open circuit circulation, the air from the waste heat boiler is directly exhausted and not recycled, resulting in more than 100 Sensible heat of the air at a high temperature is wasted, and the discharged air contains a large amount of small particles of dust, causing a certain degree of particulate matter pollution to the atmosphere;

[0008] 3) The material at the feed inlet is severely worn: due to the "ventilated longitudinal plate cooling technology" that sets the material seal at the feed chute, there will be a friction distance between the lower part of the material seal and the upper layer of the material surface in the plate cooler box

At this time, the sintered material is easily pulverized and broken when it is rubbed under the double-layer harsh working conditions of high temperature and upper material column extrusion, thereby reducing the yield of the sintering machine;

[0009] 4) The environmental pollution is serious: due to the negative pressure ventilation technology adopted in the "ventilation type longitudinal plate cooling technology", it does not set a sealing cover device at the lower tray of the box body

In this way, when the sinter is scraped off by the scraper device, it is easy to cause a large number of fine particles and dust to splash

And once the exhaust fan breaks down, all the material dust pushed around the plate cooler will enter the atmosphere, causing extremely bad impact on the operating environment beside the machine;

[0010] 5) The thermal efficiency of the waste heat boiler has not reached the highest: because the "ventilated longitudinal plate cooling technology" does not accurately classify the air passing through the material layer according to the air temperature, but mixes it all into the waste heat boiler, so when the outlet air temperature of the low temperature section is too low , it will inevitably lower the temperature of the air entering the waste heat boiler, thereby reducing the thermal efficiency value of the waste heat boiler

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