Multi-point cooling heat exchanger

Abstract

The invention relates to the technical field of calcination of materials of lime, calcined dolomite and bauxite and the like, in particular to a multipoint cooling heat exchanger, comprising an exchanger shell, a fan and an air duct; the bottom of the exchanger shell is provided with a ring-shaped main pipe connected with the air duct; a plurality of air outlets are arranged at the periphery and the center of the ring-shaped main pipe; the upper parts of the air outlets are provided with a fork flow-guiding device; the number of the air outlets is 3 to 8, namely 2 to 6 air outlets are uniformly arranged at the periphery of the ring-shaped main pipe and 1 to 3 air outlets are respectively arranged at the center of the ring-shaped main pipe; and the number of the air outlets is 5, namely four air outlets are uniformly arranged at the periphery of the ring-shaped main pipe and one air outlet is arranged at the center of the ring-shaped main pipe. The over flow air on the section, which is vertical to the conveying direction of materials, and of the space filled with materials of the whole heat exchanger, is distributed evenly and the average height of material columns is relatively reduced. The air and the high-temperature materials realize uniform heat exchanging, thus improving the heat exchanging efficiency and achieving the object of saving energy and reducing consumption.

Description

technical field [0001] The invention relates to the technical field of calcination of lime, calcined white, bauxite and other materials, in particular to a multi-point cooling heat exchanger. Background technique [0002] The heat exchanger is one of the main equipment of the rotary kiln system for the production and roasting of lime, calcined white and bauxite (collectively referred to as: materials). It is a device that heats the secondary air for combustion and cools high-temperature materials by using the heat taken away by the finished products that have been roasted successfully. The temperature of the high-temperature material can be as high as 1100°C. When passing through the heat exchanger, it is in direct contact with the introduced cold air and moves relatively. to below 100°C. The main points of this process are: first, the heat transfer efficiency should be high, and second, the ventilation resistance should be low. [0003] For the single-point cooling heat ...

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Problems solved by technology

[0003] For single-point cooling heat exchangers, since the air supply point is concentrated at one point, the air resistance and air volume are very different from the air supply point, resulting in uneven heat transfer of materials and uneven ventilation resistance, which affects output quality and waste heat utilization.

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