Drying system and method for fruit and vegetable slices by utilizing exhaust steam heat of residual heat recovery system

A technology of waste heat recovery system and drying system, which is applied in application, food processing, food science, etc., and can solve the problems of increased production cost, large equipment investment, and high energy consumption

Inactive Publication Date: 2016-10-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hot air drying consumes a lot of energy and damages heat-sensitive nutrients, such as vitamins and volatile flavor substances. Although freeze drying and vacuum microwave drying can overcome the shortcomings of hot air drying, their eq...

Method used

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  • Drying system and method for fruit and vegetable slices by utilizing exhaust steam heat of residual heat recovery system

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Embodiment Construction

[0010] Refer to the attached figure 1 Explain the operation process of the fruit and vegetable chip drying system using the waste heat recovery system to exhaust steam heat. First, the air circulation loop can be vacuumed as needed.

[0011] The air 8 from the outlet of the compressor 7 enters the cold side of the drying box 2, and the high-temperature exhaust steam 15 of the working medium passes through the hot side of the drying box 2 to heat the material on the cold side; the mixture of the fruit and vegetable slices 1 and the air 8 in the drying box 2 is heated After the temperature rises, the air 8 mixes with the water vapor evaporated from the fruit and vegetable slices 1 to become high-temperature humid air 3, and the fruit and vegetable slices 1 are dried; the high-temperature and humid air 3 is discharged from the gas phase outlet of the drying box and enters the first condenser The hot side of 4 releases latent heat and sensible heat to the room temperature liquid w...

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Abstract

The invention relates to a drying system and method for fruit and vegetable slices by utilizing exhaust steam heat of a residual heat recovery system, and belongs to the field of energy saving. The system comprises a drying box (2), a first condenser (4), a first turbine (5), a gas-liquid separator (6), a compressor (7), a feed pump (11), an evaporator (12), a second turbine (14), a preheater (16) and a second condenser (17). According to the system, recovery of residual heat is coupled with drying of fruits and vegetables together, so that graded utilization of heat energy is realized, and the drying system can be used for drying the fruits and vegetables while outputting mechanical work outwards; low-temperature condensation water (9) separated from condensation and expanding from the drying system can enable condensation pressure in the residual heat recovery system to be reduced, so that the output work of the second turbine (14) is increased. A heat source (13) of the system can be low grade heat, such as sunlight heat, geothermal heat, industrial flue gas waste heat, steam waste heat and the like.

Description

technical field [0001] The invention relates to a drying system and method for fruit and vegetable slices using the exhausted steam heat of a waste heat recovery system, and belongs to the field of energy saving. technical background [0002] The diversified processing of fruits and vegetables is one of the economic pillars of some areas rich in fruits and vegetables, among which dehydration and drying is one of the main links. Infrared drying technology. These drying methods all use coal and electricity as the driving force. Hot air drying consumes a lot of energy and damages heat-sensitive nutrients, such as vitamins and volatile flavor substances. Although freeze drying and vacuum microwave drying can overcome the shortcomings of hot air drying, their equipment investment is large and energy consumption is high. High and low batch processing volume, resulting in a substantial increase in unit production costs, which is difficult for ordinary fruit and vegetable processi...

Claims

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Application Information

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IPC IPC(8): A23N12/08A23N12/12
CPCA23N12/08A23N12/125Y02P60/80Y02P60/85
Inventor 岳晨朱帮守韩东蒲文灏何纬峰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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