Vertical type sinter cooler with rotary distributing device and sinter cooling method

Abstract

A vertical cooling machine with a rotary distributing device comprises the rotary distributing device (1), an umbrella-shaped chute (2), vertical chutes (3), a tower body, a cooling section (6) and ahot air outlet (10), wherein the tower body is composed of a tower body top cover (4) and a tower body side wall (5), and the hot air outlet (10) is formed in the upper portion of the tower body top cover or the tower body side wall. The umbrella-shaped chute (2) comprises an upper overall section (201) and a lower separated section (202), the upper end of the overall section (201) is connected with the rotary distributing device (1), each branch of the lower separated section (202) is connected with one corresponding vertical chute (3) below, and a hot air channel (7) is formed above the cooling section (6) and in a gas space between the tower body and the vertical chutes (3). A uniform air inlet device (8) is arranged below the cooling section (6), and a plurality of discharging conicalhoppers (9) are arranged on the lower side of the uniform air inlet device (8). Discharging devices are arranged on the lower sides of the discharging conical hoppers (9). The vertical cooling machineis simple in structure, reliable in sealing and high in waste heat recovery efficiency.

Description

technical field [0001] The invention relates to a sinter cooler with a rotary distributor and a sinter cooling method, belonging 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 technology was e...

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 and repaired, all the material dust pushed around the plate cooler will enter the atmosphere, causing extremely bad influence on the operating environment next to 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

No matter which cooling method is used, the cooling machine has problems such as large air leakage rate, high fan power consumption, low sensible heat recovery rate, and low boiler thermal efficiency.

In other words, in the current environment where the market has increasingly stringent requirements for energy saving and green manufacturing in sinter production, the original equipment structure has been difficult to achieve efficient recovery and utilization of sinter sensible heat

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