Material mixing and drying system device and method

Abstract

The invention discloses a material mixing and drying system device which consists of a conventional spray drying tower, a vacuum dewatering system and an air flow drying system, wherein slurry containing a powdered solid material is pressurized through a slurry pump, and then is sprayed onto an umbrella fabric of the vacuum dewatering system in the spray drying tower from a slurry spraying nozzle; the slurry downwards flows along the umbrella fabric, and in the flowing process, water in the slurry is continuously absorbed by the vacuum dewatering system; when the slurry reaches the edge of the umbrella fabric, most of the water in the slurry is absorbed away, and the slurry becomes materials with the moisture content of 10 to 15 percent; the materials with low moisture content are dispersively thrown into a space of the spray drying tower under the vacuum dewatering system as the centrifugation force applied to the edge of the umbrella fabric is the maximum; under the action of gravity, the materials fall down and are blown into the air flow drying system through hot air located at the bottom of the spray drying tower; and then the materials with the moisture content of 10 to 15 percent become qualified products through drying of the air flow drying system and are collected. By means of the material mixing and drying system device, the drying energy consumption can be reduced and dried solid materials are obtained quickly at one time.

Description

technical field [0001] The invention belongs to the field of drying and dehydrating equipment, in particular to a system device and method for dehydrating and drying powdery solid materials contained in liquid. Background technique [0002] There are various processes and equipments for dehydration and drying of powdery solid materials contained in liquids, which are mainly divided into two categories: evaporative dehydration drying and mechanical dehydration drying, each with its advantages, disadvantages and limitations; for example: spray drying of evaporative dehydration drying It is used for dehydration and drying of powdery solid materials contained in liquid, which is characterized by short drying time but high energy consumption for evaporation; also for example: vacuum belt dehydrator of mechanical dehydration and drying type is also used for powdery solid materials contained in liquid The dehydration and drying of solid materials is characterized by mechanical dehy...

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Problems solved by technology

[0002] There are various processes and equipments for dehydration and drying of powdery solid materials contained in liquids, which are mainly divided into two categories: evaporative dehydration drying and mechanical dehydration drying, each with its advantages, disadvantages and limitations; for example: spray drying of evaporative dehydration drying It is used for dehydration and drying of powdery solid materials contained in liquid, which is characterized by short drying time but high energy consumption for evaporation; also for example: vacuum belt dehydrator of mechanical dehydration and drying type is also used for powdery solid materials contained in liquid The dehydration and drying of solid materials is characterized by mechanical dehydration. The drying energy consumption is very low, but the material cannot be completely dried (there is still 10% to 15% moisture left); another example: air drying of evaporative dehydration drying The speed is fast, but it can only be used in the drying process where the moisture content of the material is less than 15%. Therefore, if the above three drying processes and equipment are organically combined, the strengths and weaknesses are improved, and the innovation is perfect, and it is used for the dehydration of powdery solid materials contained in the liquid. and drying, it can reduce drying energy consumption and obtain dry solid materials quickly at one time

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