Vertical cement clinker grate-type particle grading cooler and cooling method

Abstract

The invention belongs to the field of cement sintering equipment, and particularly relates to a vertical cement clinker grate-type particle grading cooler. The upper layer of the cooler is a wicket cover; a fine material cooling area is arranged on the lower part, close to one side of a rotary kiln, of the wicket cover, a coarse material cooling area is arranged on one side of the fine material cooling area, and the fine material cooling area and the coarse material cooling area are separated through a separating cooling wall; a two-stage screening grate plate for filtering clinkers is arranged at the upper end of the fine material cooling area in an inclined mode; a secondary cooling area for secondary cooling of all falling materials are arranged on the lower layer of the cooler, the secondary cooling area comprises a plurality of material falling ash buckets arranged at the bottom end of the cooler, and the cooled clinkers are finally collected through the material falling ash buckets into a drag chine conveyor on the lower part of the cooler. According to the vertical cement clinker grate-type particle grading cooler, the clinkers are cooled respectively in grades, the good heat exchange effect can be achieved, meanwhile the material layer obstruction of the clinkers is lowered, and the purposes of energy saving and consumption reduction are achieved; and the process of countercurrent flow of the clinkers and air for two times is achieved, and the cooling effect is good.

Description

technical field [0001] The invention relates to the field of cement burning equipment, in particular to a vertical cement clinker grate-type particle classifying cooler and a cooling method. Background technique [0002] Cooler is a kind of cooling equipment commonly used in cement firing system; at present, horizontal cooler is mainly used in the industry, but the existing horizontal cooler does not carry out particle size separation, and the gas flow and solid are separated by local countercurrent heat exchange. Heat exchange; at the same time, the horizontal cooling machine requires a large amount of cooling air and high power consumption; in addition, only the hot air from the first three air chambers returns to the firing system, and the heat recovery efficiency is low. [0003] On the other hand, the existing vertical cooler moves downward through the vertical pile of clinker, and completes heat exchange with the upward cooling air countercurrent movement, which greatl...

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Problems solved by technology

[0004] 1) In order to improve cement quality, the clinker leaving the rotary kiln needs to be cooled rapidly; in the upper space of the vertical cooler, the clinker leaving the kiln exchanges heat with high-temperature air (above 600°C), and the rapid cooling effect of the clinker leaving the kiln is very good. hard to reach

[0005] 2) The material resistance of vertical stacking is relatively large. According to the experimental data and field tests, every 100mm of clinker will bring an air resistance of about 800Pa. If the thickness of the clinker is more than 1.5m, an air pressure of 12000Pa is required. This does not include the resistance of grate plate, roller crusher and other equipment

Excessive resistance will lead to increased power consumption, which is inconsistent with the original intention of setting vertical cooling

Therefore, most of the vertical coolers are still in the stage of theoretical calculation, and there are few cases of successful use

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