Groove type liquid-seal blast cooling device and method for sintered ores

Abstract

The invention provides a groove type liquid-seal blast cooling device (1) for sintered ores. The device comprises <1> an annular groove-shaped accumulating tank body, <2> a wheel rail driving device (5) of the tank body, <3> an annular engine cover (8), <4> a first air outlet pipeline (21) and a second air outlet pipeline (22), <5> a closed annular air charging chamber (11), <6> a liquid sealing device (14), <7> a plurality of air blowers (9), and <8> one or more scraper devices (6), wherein the tank body comprises an inner annular wall (2), an outer annular wall (3) and a whole circle of annular tray (4) which is arranged at the bottom of the tank body; the annular engine cover (8) is arranged at the upper part of the tank body; the first air outlet pipeline (21) and the second air outlet pipeline (22) are connected with the top of the engine cover (8); a sealing effect is played between the liquid sealing device (14) and the inner annular tank body wall (2) and the outer annular tank body wall (3) of the rotating annular groove-shaped accumulating tank body; and each scraper device (6) is installed at the outer side of a discharging section (1a) of the cooling device (1). The cooling device (1) has outstanding advantages in aspects of 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...

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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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