Band-type roasting machine cooling and hot wind returning system and band-type roasting machine cooling and hot wind returning method

Abstract

The invention relates to a band-type roasting machine cooling and hot wind returning system and a band-type roasting machine cooling and hot wind returning method. The band-type roasting machine cooling and returning hot wind system comprises a forced air drying section, a down-draft drying section, a preheating section, a roasting section and a cooling section. The band-type roasting machine cooling and returning hot wind system is characterized in that the cooling section is divided into three cooling sections, a cooling fan is arranged at the lower part of a cooling section 1, a shared fan is arranged at the lower parts of a cooling section 2 and a cooling section 3; a hot waste air induced wind cover I is arranged at the upper part position of the cooling section 1, the hot waste air produced from the three cooling section is correspondingly connected to a sintering section, the preheating section and the forced air drying section correspondingly through three induced wind covers, a hot wind returning pipeline and a branch pipeline group. The band-type roasting machine cooling and hot wind returning system and the band-type roasting machine cooling and hot wind returning method have the advantages that the blast capacity and the wind temperature of each section are adjustable, the hot wind returning system is recycled and utilized efficiently, the flexible and convenient operation is achieved, and the thermal regulation in the roasting machine is more reasonable.

Description

technical field [0001] The invention relates to the technical field of pellet production, in particular to a belt roaster cooling and hot return air system and a method thereof. Background technique [0002] In the pelletizing process of the belt roaster, the cooling system of the roaster is divided into two sections, and a common cooling fan is used. The cold air provided by the cooling fan first passes through a main pipe, and then is sent to the roaster by a branch pipe on the main pipe. Cool the pellets. The temperature of the pellets entering the first stage of cooling is about 1100°C, the temperature of the pellets entering the second stage of cooling through cooling is about 400°C, and after cooling, the temperature of the finished pellets is about 120°C. The hot air return system is composed of the hot air return duct of the upper cover of the cooling section and the hot return air duct of the upper cover of the second section of cooling. The temperature of the hot ...

AI Technical Summary

Problems solved by technology

However, in the existing design of the belt roaster, the hot return air in the cooling section is sent to the roasting section and the preheating section through a main pipe and several branch pipes at the same time. The increase in the number of burners, the increase in the number of burners, and the increase in the number of branch pipes that provide hot air return. During the production process, the air volume and air pressure of each branch pipe cannot be effectively adjusted, thus affecting the roasting process of the belt machine.

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