Horizontal cement clinker grate type particle grading cooler and cooling method

Abstract

The invention belongs to the field of cement firing equipment, and discloses a horizontal cement clinker grate type particle grading cooler and a cooling method. The upper layer of the cooler is provided with a kiln door cover; one side of the kiln door cover is connected to a rotary kiln and a tertiary air pipe; the tertiary air pipe communicates with a decomposition furnace; the end, far away from the tertiary air pipe, of the kiln door cover is provided with a fine particle sedimentation chamber; the end, connected to the kiln door cover, of the rotary kiln is provided with a discharge slope; the bottom end of the discharge slope is connected to a particle grading air duct, and the particle grading air duct is located on the side facing the rotary kiln and below the kiln door cover; thebottom of the particle grading air duct is connected to a horizontal grate cooler; a plurality of air chambers are arranged at the lower end of the horizontal grate cooler; a discharging ash hopper is connected below the fine particle sedimentation chamber; and the bottom end of the discharging ash hopper is connected to an inlet of a single-cylinder cooler through a discharging trough. By meansof the horizontal cement clinker grate type particle grading cooler and the cooling method, cement clinker particles are graded to be cooled separately, so that the heat exchange efficiency of gas andmaterials is greatly improved, the ventilation resistance of material layers is reduced, the amount of cooling air is reduced, the heat recovery efficiency is improved, and the heat consumption of afiring system is reduced.

Description

technical field [0001] The invention relates to the field of cement burning equipment, in particular to a horizontal 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, the existing horizontal grate cooler of new dry process cement firing system adopts horizontal fixed bed cooling method, and the clinker particles after the rotary kiln is calcined are naturally It falls flat on the horizontal grate bed, and exchanges heat with the vertically upward cooling air at room temperature. When the clinker is cooled, the heat of the clinker is brought back by the hot air to the combustion equipment such as the rotary kiln and the calciner. [0003] However, due to the wide particle size distribution of the clinker leaving the kiln in the traditional horizontal grate cooler, a large number of fine particles below 1mm are filled in the gaps of t...

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Problems solved by technology

[0003] However, due to the wide particle size distribution of the clinker leaving the kiln in the traditional horizontal grate cooler, a large number of fine particles below 1mm are filled in the gaps of the large clinker, which not only increases the ventilation resistance of the material layer, but also limits the thickness of the material layer. , but also reduces the uniformity of material layer ventilation and reduces the efficiency of gas-solid heat exchange

The clinker without particle classification is directly cooled, and the heat exchange between the air flow and the solid is only performed through local countercurrent heat exchange; at the same time, the horizontal cooler requires a large amount of cooling air and high power consumption; in addition, only the first three wind The hot air in the chamber returns to the firing system, and the heat recovery efficiency is low

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