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Energy-saving and modification method for heat pump distillation and device thereof

A technology of heat pump rectification and energy-saving transformation, which is applied in the direction of fractionation, etc., and can solve problems such as inability to adjust or narrow adjustment range, energy-saving transformation of old distillation towers, heat mismatch between tower top and bottom, etc.

Inactive Publication Date: 2011-07-20
XI AN JIAOTONG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned disadvantages that the existing technology cannot carry out energy-saving transformation on the old rectification tower, and there is a shortcoming that cannot be adjusted or the adjustment range is narrow due to the heat mismatch between the top and the bottom of the tower. Measures for an open heat pump system, providing a heat pump rectification energy-saving modification method and device

Method used

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  • Energy-saving and modification method for heat pump distillation and device thereof
  • Energy-saving and modification method for heat pump distillation and device thereof
  • Energy-saving and modification method for heat pump distillation and device thereof

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0025] figure 1 It is a schematic diagram of the structure and process flow of a common normal rectification device. The rectification device consists of a rectification tower 1, a condenser 2, a main reboiler 3, a flow regulating valve 12, a flow regulating valve 19, a flow regulating valve 23 and A flow regulating valve 24 constitutes. The condensation heat of steam at the top of rectification tower 1 is all taken away by the external cooling water, and all the evaporation heat of the liquid at the bottom of the tower is provided by external heating steam. Such as figure 1 As shown, the vertical position of the condenser 2 is higher than the reflux hole of the rectification tower 1, and the reflux liquid and the top discharge flow to the corresponding inlets by gravity, and the flow is regulated by the reflux liquid regulating valve 23 and...

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Abstract

The invention discloses an energy-saving improved device of heat pump distillation and a method thereof. The device, on the basis of the original rectification column, is further equipped with a pre-heater, a compressor, an auxiliary re-boiler, an after-cooler, a liquid buffer tank, a valve and the like. The facilities are connected with a steam pipe on the top of the rectification column and a liquid pipeline at the bottom of the column via pipelines, forming an open type heat pump system. The energy-saving improving method for heat pump distillation can be switched by the valve appropriately, thus leading the rectification column to being capable of working in the normal rectification mode, or working in the mode of heat pump distillation according to needs, and further achieving the purpose of saving energy.

Description

technical field [0001] The invention belongs to the technical field of chemical separation and energy-saving transformation, and relates to a rectification method and device, in particular to a heat pump rectification energy-saving transformation method and device. Background technique [0002] The rectification process is a common unit operation used to separate homogeneous liquid mixtures based on the different volatilities of the various components in the mixture. In order to achieve component separation, it is necessary to adopt methods to partially vaporize the mixed liquid or partially condense the gas. When the mixed liquid is vaporized, the proportion of light components contained in the gas phase will be higher than that in the original mixed liquid, that is, the purity of the light components in the gas phase will become higher; similarly, when the mixed gas is condensed, the concentration of heavy components in the condensate will be higher than that of the gas he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/14B01D3/32
Inventor 冯诗愚顾兆林李云高秀峰侯雄坡王赞社
Owner XI AN JIAOTONG UNIV
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