Method and cooler for cooling hot-state granular material during enhanced convection heat exchange

Abstract

The invention provides a method and a cooler for cooling a hot-state granular material during enhanced convection heat exchange. The method relates to a cooling process of clinker granular materials generated by industrial furnace equipment such as a rotary cement kiln and the like, and through the method, a high-temperature granular material from a rotary kiln is conveyed to a step grate at an inlet of the cooler and then enters a horizontal grate, and cooling air from the downside of the grate passes through the grate to exchange heat with a hot-state granular material layer to achieve an effect of cooling the hot-state granular material; after the material enters the horizontal grate, a reciprocating pendulum sweeping type material-pushing scraper can make the hot-state granular material generate superposition of two motions including forced stirring homogenization and rolling advancing in the process of heat exchange; granules form curve running tracks in a three-dimensional space; the temperature distribution of the material correspondingly trends to be balanced; and the uniform distribution of the granules actively balances the resistance of the whole material layer to ensure that the cooling air is distributed more uniformly, the dependence on an automatic air flow control valve under the grate is reduced, and the heat exchange efficiency and the heat exchange speed are obviously increased.

Description

Technical field [0001] The invention relates to a cooling method and a cooler for hot clinker granular materials produced by industrial kiln equipment such as cement rotary kilns. By using the cooler, the hot granular materials can be cooled in a process based on convective heat exchange. Strengthen the effect of the convective heat transfer process to achieve the purpose of efficiently cooling hot granular materials, thereby reducing heat and electric energy losses. This method and cooler can be widely used in building materials, chemical industry, metallurgy and other industries, such as for cement production. The high-temperature clinker granule cooling belongs to the technical field of high efficiency and energy saving. Background technique [0002] During the production and operation of industrial kiln equipment such as cement rotary kiln, the cooling air is often used to cool the hot granular material by means of convective heat exchange. During the cooling process, wh...

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Problems solved by technology

[0002] During the production and operation of industrial kiln equipment such as cement rotary kiln, the cooling air is often used to cool the hot granular material by means of convective heat exchange. During the cooling process, when the hot granular material enters the cooler from the rotary kiln Due to gravity and mechanical rotation, the particle size distribution and particle layer thickness of the particles on the grate bed cannot be very uniform, and the uneven particle size also leads to the difference in the resistance of the material layer. It relies on the air flow automatic regulating valve under the grate bed to passively adapt to the change of the resistance of the material layer. The situation of uneven particle size and resistance of the material layer still exists objectively, and the cooling air cannot achieve the effect of uniform distribution on the entire grate bed. limited improvement

At the same time, at present, the movement of hot granular materials in the cooler is basically a single approximate linear motion as the grate bed is pushed back and forth, and there is no effective means and method to forcefully improve its heat exchange efficiency, so its heat exchange efficiency is difficult. achieve the desired effect

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