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Flashboard unloading-type vertical cooler with material position adjusting device and sintering ore cooling method

A height adjustment device and cooling machine technology, applied in the field of ironmaking, can solve the problems of low utilization rate of waste heat, large air leakage rate of the cooling machine, material wear at the feed inlet, etc., achieve high waste heat recovery efficiency, small equipment maintenance, Sealed and reliable effect

Pending Publication Date: 2018-10-23
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Flashboard unloading-type vertical cooler with material position adjusting device and sintering ore cooling method
  • Flashboard unloading-type vertical cooler with material position adjusting device and sintering ore cooling method
  • Flashboard unloading-type vertical cooler with material position adjusting device and sintering ore cooling method

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Experimental program
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Effect test

Embodiment 1

[0170] The height of the tower body consisting of the top cover and the tower wall of the cooling machine is 9 meters. The outer diameter of the tower body is 13 meters. The diameter of the hood is 2.5 meters. The height of tower body cone 5 is 5.5 meters. The inner diameter of the wind ring is 10.5 meters.

[0171] The daily processing capacity of sinter is 8650 tons / day. The temperature of the sintered ore before entering the silo is 700°C, and the temperature of the hot air at the hot air outlet 8 reaches 500°C. The recovered heat is used to generate electricity, and the power generation is about 35 kWh.

[0172] Compared with the prior art annular cooler, the advantages are: high power generation, low air leakage rate, small dust emission, simple and reliable equipment, and because of better sealing, the technology of the present invention can provide higher temperature hot air for generating High-temperature steam significantly improves power generation efficiency.

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Abstract

A flashboard unloading-type vertical cooler comprises a bin (1), a material height adjusting device (2), a tower composed of a tower top cover (3), a tower wall (4), a tower cone barrel (5) and a tower base (D), a wind ring (H), a wind cap (M), a plurality of discharge outlets (5a) formed in the lower portion of the discharge cone bucket (5), and a hot air outlet (8) formed in the upper portion ofthe tower wall (4) or in the tower top cover (3), wherein the tower cone barrel (5) is located on the lower portion of the tower wall (4). A circle of fixed gap is formed between the lower portion ofthe tower wall (4) and the top of the discharge cone bucket (5) to serve as the wind ring (H). The center of the tower base is provided with the wind cap (M) which upwards extends into the inner space of the tower. Discharge gates or discharge flashboards (12) are arranged at the discharge outlets (5a) accordingly, and a discharge channel (10) is formed below the discharge gates (12).

Description

technical field [0001] The invention relates to a ram discharge type vertical cooler with a material level regulating device 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,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D15/02
CPCF27D15/0206
Inventor 贺新华戴波张震刘克俭
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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