Material drying system utilizing waste heat of tail gas of gas-fired boiler

Abstract

The invention provides a material drying system utilizing waste heat of tail gas of a gas-fired boiler, and belongs to the technical field of material drying equipment. The material drying system comprises a drying mechanism, the drying mechanism comprises an outer heat preservation barrel and a rotary drying barrel arranged in the outer heat preservation barrel, and a rotary guide support for supporting the rotary drying barrel is arranged in the outer heat preservation barrel; and a heating cavity is formed between the outer heat preservation barrel and the rotary drying barrel. A power case is arranged at one end of the drying mechanism, a power assembly for driving the rotary drying barrel to rotate is arranged in the power case, and a material collecting device is arranged at the other end of the drying mechanism; and the heating cavity in the drying mechanism is communicated with the boiler tail gas waste heat insulation box, ventilation pipe openings are formed in the upper end and the lower end of the boiler tail gas waste heat insulation box, and a first fan is arranged between the drying mechanism and the boiler tail gas waste heat insulation box. The material drying system utilizing waste heat of tail gas of a gas-fired boiler can be used for drying materials before tail gas treatment, the utilization rate of the tail gas waste heat is increased, the materials are dried more evenly, and meanwhile rapid cooling is facilitated.

Description

technical field [0001] The invention relates to the technical field of material drying equipment, in particular to a material drying system utilizing waste heat from gas boiler tail gas. Background technique [0002] When the boiler is in operation, the tail gas discharged from the flue will be produced by waste heat. Waste heat is the energy that is not used in energy utilization equipment under certain economic and technical conditions, that is, redundant and waste energy. Waste heat recovery and utilization is to improve economic efficiency. An important way to save fuel, the waste heat recovery device mainly recycles waste heat. [0003] Steel slag is a by-product of the steelmaking process. It is composed of various oxides formed by the oxidation of impurities such as silicon, manganese, phosphorus, and sulfur in pig iron during the smelting process, and salts formed by the reaction of these oxides with solvents. The mineral composition of steel slag is mainly tricalc...

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Problems solved by technology

[0004] At present, in the drying process of steel slag, when using the waste heat of boiler tail gas to dry, it is necessary to firstly carry out dust treatment and special component treatment, and after drying, it is finally passed into the drying cylinder for drying, but the tail gas is in the process of treatment , the heat will be lost a lot, because in consideration of not letting the tail gas lose too much heat, therefore, in the process of tail gas treatment, it cannot be passed into water for filtration and treatment, which limits the way of boiler tail gas treatment to a certain extent. When it is inside the drying cylinder, it is only fed from one end of the drying cylinder, which is easy to make the material dry unevenly; and at present, the dried material needs to be cooled naturally after being exported, and the cooling process is long, and tools are also used for stirring. Cooling, but during this process, it is easy to make the moisture in the air enter the steel slag powder, which will affect the mixing effect of later use

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