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A multi-stage heat pump drying and dehumidification system with bypass pipeline

A bypass pipeline and heat pump drying technology, which is applied in dryers for static materials, drying gas layout, local stirring dryers, etc., can solve the problems of easy frosting in the drying system and difficulty in adapting to the return air temperature difference for a single-stage heat pump system. , to ensure efficient and stable operation, excellent dehumidification performance, and reduce the amount of water vapor.

Active Publication Date: 2019-12-17
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: in order to solve the problem that the fully open and semi-open drying systems are prone to frost in areas with low outdoor environment, and the single-stage heat pump system is difficult to adapt to the environment with a large return air temperature difference, and realize various Dry conditions

Method used

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  • A multi-stage heat pump drying and dehumidification system with bypass pipeline

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Embodiment Construction

[0029] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise stated, the scope of "above" includes the number, and the meaning of "plurality" is more than two; the terms "upper", "lower", "left", " The orientation or positional relationship indicated by "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of It is convenient to describe the present invention and simplify the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate ...

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Abstract

The invention belongs to the technical field of hot air drying of agricultural and sideline products, and discloses a multi-stage heat pump drying and dehumidification system with a bypass pipeline, comprising: a control unit, a main air duct and a drying room for placing materials to be dried, the drying room An air supply port for introducing gas and an air exhaust port for exhausting gas are provided; the two ends of the main air duct are respectively connected with the air supply port and the air exhaust port, and the main air duct is provided with a main fan and an air exhaust port. A dehumidification chamber, a water baffle, and a heating chamber are arranged in sequence along the airflow direction; it also includes a multi-stage heat pump unit and a bypass pipeline connected with the dehumidification chamber to realize multi-stage heating and multi-stage dehumidification. Compared with the single-stage heat pump drying system, the pressure ratio of the compressor is reduced, and the efficiency of the compressor is improved, and the air volume control based on the bypass pipeline can effectively adjust the dehumidification performance of the system, so that the system has a larger adjustment range.

Description

technical field [0001] The invention relates to the technical field of hot air drying of agricultural by-products, in particular to a multi-stage heat pump drying and dehumidification system with a bypass pipeline. Background technique [0002] With the development of heat pump technology, research on drying has become a hot spot. Heat pumps have the advantages of energy saving, environmental protection, and high temperature control accuracy. Compared with traditional coal-fired drying systems, they have greater advantages in improving drying quality, reducing drying energy consumption, and protecting the environment in the drying process of agricultural and sideline products. [0003] The heat pump's high efficiency, energy saving performance, environmental protection and other characteristics have been confirmed by domestic and foreign literature research and production practice. The application of heat pump in the drying system is divided into three types: fully open, se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B41/04F25B41/06F25B49/02F26B9/06F26B21/00F25B41/20F25B41/31
CPCY02B30/70
Inventor 张振涛苑亚魏娟杨鲁伟孙椰望毛祥谢诚
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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