Energy-conserving drying device

Abstract

The invention relates to a drying device, particularly relating to an energy-conserving device, and providing a high-air-volume multistage circular energy-conserving drying device utilizing wastes to heat fresh air. A drying room is composed of multi-section drying ovens; each drying oven is provided with a diaphragm; an enclosed air room with multiple air flue slits is arranged on the diaphragm,and is communicated with a heat exchanger through an air inlet main pipe, an air inlet branch pipe, an air outlet main pipe and an air outlet branch pipe; a fresh-air taking opening is connected withthe heat exchanger and a heat exchanging draught fan in sequence; the outlet of the heat exchanger, the air inlet main pipe and the air inlet branch pipe are connected with each air room; the air exhaust branch pipe of the previous two-section drying oven air room with high waste gas concentration is discharged through a primary heat exchanger; other air exhaust branch pipes are connected on the air outlet branch pipe, and are connected with a secondary heat exchanger and the front end part of the heat exchanging draught fan to form circulation; the inner air volume is increased; the hot air circulates in the drying oven; the waste gas temperature is utilized to save energy source; the drying oven temperature is flexibly set, and small circulation is flexibly regulated in the drying oven;and the temperature control is uniform.

Description

technical field [0001] The invention relates to a drying device, in particular to an energy-saving drying device. Background technique [0002] At present, many equipment need to be dried after the parts are processed, so drying is also a necessary process in many processes, so the drying device is also a device that is often included in many devices. In the existing drying device, Various methods are often used for heating and drying, such as steam heating for drying, and electric heating for drying. In the drying process, the existing equipment usually uses outdoor fresh air to send air to the drying room, and then the The exhaust gas containing volatile solvents in the drying room is discharged. When these high-temperature exhaust gases are discharged, a large amount of heat energy is taken away, resulting in a waste of energy. There are often multi-stage ovens on the drying device, and the fresh air is heated to a high temperature by an electric heater. Gas, to dry the...

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Problems solved by technology

[0002]At present, many equipments need to be dried after the parts are processed, so drying is also a necessary process in many processes, so the drying device is often used in many equipments In the existing drying equipment, various methods are often used for heating and drying, such as steam heating for drying, and electric heating for drying. In the drying process, the existing equipment The usual method is to use outdoor fresh air to send air to the drying room, and then discharge the waste gas containing volatile solvents from the drying room. There are always multi-section ovens on the floor, and the fresh air is heated into high-temperature gas by electric heaters, and the workpiece is dried in sections. The temperature of each oven can be the same or different according to the process requirements. Each oven has an air inlet duct and exhaust. Therefore, a large amount of fresh air is directly discharged out of the drying room just after being heated into hot air, which means that a large amount of heat energy is discharged, resulting in a great waste of energy, especially in mass production and production with multiple equipment. It is very amazing: engineers and technicians have also found that this waste is serious, and have conducted research in this area to find out the existing problems: uniform mixing of high and low temperatures, uniform discharge of all, and no specific conditions for different sections Treat differently, use exhaust gas differently, fail to use more accurately the relationship between air volume and drying, the relationship between exhaust gas concentration and drying, and the possibility of internal circulation to reduce energy consumption, etc. These problems need further research and resolution in order to develop a more reasonable A more efficient and energy-saving drying device

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