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High temperature heat pump system for distillation

A high-temperature heat pump and distillation tower technology, applied in the field of mechanical engineering, can solve the problems of low investment, unfavorable stable operation of the heat pump, and large actual power consumption of the heat pump system.

Active Publication Date: 2013-04-03
XI AN JIAOTONG UNIV
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  • Abstract
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Problems solved by technology

[0004] Although the energy utilization rate of most industrial rectification devices is less than 10%, conventional distillation towers are still widely used because of their simple equipment and low investment.
Directly connect the heat pump system with the distillation system, the large temperature difference between the top and the bottom of the rectification tower will lead to a large actual power consumption of the heat pump system, and it will be detrimental to the stable operation of the heat pump

Method used

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  • High temperature heat pump system for distillation

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] see figure 1 , the present invention includes a low-pressure compressor 1 and a high-pressure compressor 2 connected in series, and the outlet of the high-pressure compressor 2 is connected with a vortex tube 3 that separates the medium of the high-pressure compressor into a 150°C high-temperature medium and a 70°C low-temperature medium, The high-temperature medium is connected to the refrigerant separator 9 through the heating end of the condenser 5, and the heat exchange end of the condenser 5 is connected to the bottom of the distillation tower 13 to form a closed loop loop to heat the material to be heated in the distillation tower. The inlet of the condensing end of the evaporator 7 is connected, and the outlet of the condensing end of the evaporator 7 is equipped with a condensing separator 10. The liquid outlet of the condensing separator is co...

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Abstract

The invention discloses a high temperature heat pump system for distillation. Through the adoption of the system, high temperature steam for heating materials at the bottom of a distillation tower can be generated; meanwhile, cold quantity generated by the system can be used for condensing output products at the top of the distillation tower. According to the invention, the heat pump system is connected with a distillation system through two heat exchangers; the gas distilled at the upper part of the distillation tower is cooled through an evaporator of the heat pump, and latent heat in the gas is absorbed and supplied to the heating side of the tower bottom through heat pump cycle. The high temperature heat pump system for the distillation, disclosed by the invention, has the advantages that the temperature of a refrigerant for heating the materials at the bottom of the tower is increased to 150 DEG C through the adoption of a vortex tube and the application places of the heat pump in the distillation system are greatly expanded.

Description

technical field [0001] The invention belongs to the technical field of mechanical engineering and relates to a high-temperature heat pump system for distillation with energy recovery and energy saving. Background technique [0002] The chemical industry accounts for a large proportion of industrial energy consumption, and distillation is the most important and widely used separation operation in the chemical process. The rectification process consumes a lot of energy and has low thermodynamic efficiency. The total efficiency of the rectification section in many factories is lower than 10%. [0003] There are two main basic processes in petrochemical plants: reaction process and separation process. Usually, the energy consumption of the separation process accounts for about 80% of the total energy consumption of the device. Rectification is the most commonly used and effective method in the separation process, which uses heat energy consumption to separate and purify chemic...

Claims

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Application Information

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IPC IPC(8): F25B30/02B01D3/14
Inventor 曹锋何永宁邢子文陈向阳
Owner XI AN JIAOTONG UNIV
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