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Heat-exchange wall structure of inner heat-integration falling film distillation device

A falling film distillation and heat exchange wall technology, applied in the field of rectification, can solve the problems of small heat transfer area, insufficient gas-liquid mass transfer, etc. Effect

Inactive Publication Date: 2014-05-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention mainly improves on the shortcomings of the traditional rectification tower such as small heat transfer area and insufficient gas-liquid mass transfer.

Method used

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  • Heat-exchange wall structure of inner heat-integration falling film distillation device
  • Heat-exchange wall structure of inner heat-integration falling film distillation device
  • Heat-exchange wall structure of inner heat-integration falling film distillation device

Examples

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Effect test

example 1

[0022] Example 1: The heat exchange wall of the falling film distillation unit with internal heat integration is a flat plate structure, and there are baffles on both sides of the heat exchange wall. The distance between adjacent baffles is 5 times the height of the baffles. The opening of the baffle on one side of the stripping section is upward, and the opening of the baffle on one side of the rectifying section is downward. The baffles are arranged in parallel and staggered, and the positions of the upper and lower baffles are staggered. The upper baffle is located at one end of the heat exchange wall, and the lower baffle is located at the other end of the heat exchange wall (long distance); The length is 4 / 5 of the width of the heat exchange wall.

example 2

[0023] Example 2: The heat exchange wall of the falling film distillation unit with internal heat integration is a flat plate structure, and there are baffles on both sides of the heat exchange wall. The distance between adjacent baffles is 8 times the height of the baffles. The opening of the baffle on one side of the stripping section is upward, and the opening of the baffle on one side of the rectifying section is downward. The baffles are arranged in parallel and staggered, and the positions of the upper and lower baffles are staggered. The upper baffle is located at one end of the heat exchange wall, and the lower baffle is located at the other end of the heat exchange wall (long distance); The length is 5 / 7 of the width of the heat exchange wall.

example 3

[0024] Example 3: The heat exchange wall of the falling film distillation unit with internal heat integration is a cylindrical structure, and there are baffles on both sides of the heat exchange wall. The height of the baffles is 1 / 50 of the height of the tower, and the angle between the baffles and the wall is 10° The included angle, the distance between adjacent baffles is 10 times the height of the baffles. The opening of the baffle on one side of the stripping section is upward, and the opening of the baffle on one side of the rectifying section is downward. The baffles are arranged in parallel and staggered, the upper-level baffles are located in the middle of the horizontal position of the same-level baffles, the lower-level baffles are located at both ends of the vertical position of the upper-level baffles (short distance), and the adjacent baffles of the same level The spacing between the plates is 1 / 2 of the length of the baffle. The length of the baffle is 1 / 6 of t...

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Abstract

The invention relates to a heat-exchange wall structure of an inner heat-integration falling film distillation device. A wall face between a rectifying section and a stripping section is a heat-exchange wall, both sides of the heat-exchange wall are respectively provided with a flow baffle (25), the flow baffles (25) and the wall face (26) form certain inclination angles, the inclination angles are not greater than 60 degrees, an opening of the flow baffle at one side of the stripping section is upward, an opening of the flow baffle at one side of the rectifying section is downward, the vertical heights of the flow baffles are 1 / 5 to 1 / 200 of the height of a tower, and the distance of the adjacent flow baffles is 2 to 50 times of the vertical height of the flow baffle. The distance of the in-step adjacent flow baffles is 1 / 10 to 9 / 10 of the lengths of the flow baffles, and the lengths of the flow baffles are 1 / 10 to 9 / 10 of the width or the perimeter of the heat-exchange wall. According to the heat-exchange wall structure of the inner heat-integration falling film distillation device, the flow distance and the contact time of a liquid phase and a gas phase are increased by changing the heat-exchange wall structure, and the upward flow efficiency of the gas phase along the wall of the tower is enhanced. The energy loss can be greatly reduced, and the energy consumption of the rectifying process is effectively lowered. Moreover, the heat transfer and the mass transfer between the two phases can be increased, and the separation effect is enhanced.

Description

technical field [0001] The invention belongs to the technical field of rectification, and in particular relates to a heat exchange wall structure of an internal heat integrated falling film distillation device. Background technique [0002] The heat exchange of the traditional rectification column is realized by the reboiler and the condenser. The steam at the top of the column is cooled by the cooling system, and the bottom liquid of the column is heated and reboiled by the steam. Most of the energy is lost in such as the pressure drop of the column and through the heat exchanger. on the temperature difference. Compared with the traditional distillation column, the internal heat integrated distillation column can effectively reduce the energy consumption of the distillation process. figure 1 A schematic diagram of an internal heat-integrated rectification tower with inter-tower diathermy is given, in which the inner tower is the rectification section and the outer tower is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/14B01D3/32
Inventor 刘伯潭朱明孙博刘春江
Owner TIANJIN UNIV