Gypsum board drying machine and application thereof

Abstract

The invention relates to a gypsum board drying machine and an application thereof. The drying machine comprises an inlet preheating section, a drying machine first area, a drying machine second ares and a drying machine third area which are sequentially arranged, and further comprises a second heat exchanger, a second preheating fan, a second waste gas fan and a hot air pipeline, wherein the second heat exchanger is arranged at the joint of the drying machine second area and the drying machine third area, the second preheating fan is connected with the second heat exchanger and is used for blowing external air into the second heat exchanger, the second waste gas fan is connected with the drying machine second area and the second heat exchanger and is used for blowing wet hot gas dischargedfrom the drying machine second area into the second heat exchanger, so that the wet heat gas and the external air are subjected to heat exchange in the second heat exchanger, and the hot air pipelineis connected with the inlet preheating section and the second heat exchanger and is arranged to introduce hot air obtained after heat exchange into the inlet preheating section. The gypsum board drying machine has the advantages that the problem of pits in a gypsum board surface can be effectively solved, meanwhile, the production efficiency is improved, the energy consumption is reduced, and theproduction cost is reduced.

Description

technical field [0001] This application relates to but not limited to the field of building materials, in particular to but not limited to a gypsum board dryer and its application. Background technique [0002] Almost all gypsum board production lines utilize fossil fuels (coal, natural gas, etc.) to meet the thermal energy requirements of the gypsum board production process. These heat energy are mainly used in production stages such as supplying raw materials for gypsum board, gypsum sintering and drying process of gypsum board. [0003] In the gypsum board drying stage, the heat energy generated by fuel combustion is used to dry the gypsum boards passing through continuously. The moisture content of the wet gypsum board before drying is about 25%-35wt%, and the moisture content drops below 1wt% after drying. The water in the wet plasterboard is evaporated almost entirely by the heat energy from the combustion of the fuel. Generally speaking, the gypsum board dryer has ...

AI Technical Summary

Problems solved by technology

However, in the prior art, a large amount of water vapor and waste heat generated in each stage of the drying step have not been reasonably recovered and fully utilized.

[0004] The drying process of gypsum board consumes a lot of heat, and the winter weather is cold and the temperature is low, so the production energy consumption is high, resulting in a low production line production speed

In addition, during the production in autumn and winter every year, there is still the problem of pitting on the surface of the gypsum board

The pitting phenomenon on the upper paper surface of the gypsum board seriously affects the appearance quality of the product, and even affects the strength of the gypsum board

At the same time, due to the low temperature of the board, higher heat is required to evaporate the same amount of water in the dryer, resulting in high energy consumption and a sharp increase in production costs

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