Green energy-saving fuel gas direct combustion drying system

Abstract

The invention relates to the field of silica gel drying, in particular to a green energy-saving fuel gas direct-fired drying system. The green energy-saving fuel gas direct-fired drying system comprises a first-stage drying device and a second-stage drying device, wherein the first-stage drying device is provided with a material inlet, the second-stage drying device is provided with a material outlet, and materials are continuously conveyed to the second-stage drying device from the first-stage drying device; and direct combustion equipment is communicated with the secondary drying device, hot air generated by the direct combustion equipment sequentially passes through the second-stage drying device and the first-stage drying device, serves as hot moisture, passes through the first-stage drying device in an indirect contact manner after passing through a hot moisture circulating device and then is communicated with a hot moisture heat exchange device used for heating fresh air, and the fresh air is communicated with the direct combustion equipment. According to the green energy-saving fuel gas direct-fired drying system, the mode that the two or more drying devices are combined is adopted for drying the materials in sequence, so that the heat utilization rate and the drying efficiency are improved; and an air temperature type vaporizer is transformed, a water bath circulation type vaporizer is additionally arranged, and cold air and cold water are generated through cold energy generated in the LNG gasification process to replace an air conditioner and a refrigerating machine.

Description

technical field [0001] The invention relates to the field of silica gel drying, in particular to a green energy-saving gas direct combustion drying system. Background technique [0002] At present, basically all users use a single drying mode. The entire drying process from high-moisture moisture materials to low-moisture products is carried out in one drying equipment. In fact, each material has its own unique drying curve. A single drying mode will inevitably cause problems such as low utilization of heat, long drying time, and material quality that cannot meet the requirements. During the drying process of materials, a large amount of waste gas, waste heat and dust are directly discharged into the atmosphere, which not only pollutes the atmospheric environment, but also causes waste of energy; The gasification function is realized by sensible heat and absorbing the heat of the external atmosphere, and all the cold energy is wasted. SUMMARY OF THE INVENTION [0003] Th...

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Problems solved by technology

[0002] At present, basically all users adopt a single drying mode. The entire drying process from high-moisture wet materials to low-moisture finished products is carried out in one kind of drying equipment. In fact, each material has its own unique drying curve, and this A single drying mode will inevitably cause problems such as low heat utilization, long drying time, and material quality that cannot meet the requirements.

A large amount of waste gas, waste heat and dust are directly discharged into the atmosphere during the drying process of materials, which not only pollutes the atmospheric environment, but also causes a waste of energy. Sensible heat and absorption of heat from the external atmosphere to realize the gasification function, and all cold energy is wasted

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