Energy-saving rectifying device for integrating energy in rectifying tower sequence and method

A technology of internal energy and rectification tower, applied in the field of rectification, can solve the problems of large diameter of tower body, high operating cost, large tower height, etc., and achieve the effect of broad industrial application prospect, saving operating cost and great economic benefit.

Inactive Publication Date: 2011-02-09
TIANJIN UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the existing multi-component separation conventional distillation sequence such as figure 1 As shown, when separating difficult-to-separate systems, the number of theoretical plates required is large, resulting in a large height of the tower; the operating reflux ratio of the req...

Method used

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  • Energy-saving rectifying device for integrating energy in rectifying tower sequence and method
  • Energy-saving rectifying device for integrating energy in rectifying tower sequence and method
  • Energy-saving rectifying device for integrating energy in rectifying tower sequence and method

Examples

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Embodiment 1

[0033] Embodiment one (BTX system separation)

[0034] Situation 1: BTX system separation, using the process described in the present invention, such as figure 2 shown. Feed rate 1000kg / h, feed composition: benzene, 33.3% (wt%), toluene, 33.3% (wt%), xylene, 33.4% (wt%), feed heat state is bubble point feed. The number of theoretical plates in the distillation column of light components is 40, and the number of theoretical plates in the rectification column section and stripping column section of the light component refining column is 20 respectively. The operating pressure of the light-ends distillation tower and the light-ends refining tower rectification column section is normal pressure, and the operating pressure of the light-ends refining tower stripping column section is 0.3 atm. The total internal heat exchange capacity between the rectification column section and the stripping column section of the light end refining tower is 57kW. The output of the bottom product...

Embodiment 2

[0056] Embodiment two (PCM system separation)

[0057] Situation 1: PCM system separation, using the process described in the present invention, such as figure 2shown. Feed amount 1000kg / h, feed composition: n-pentane, 33.3% (wt%), cyclopentane, 33.3% (wt%), 2-methylpentane, 33.4% (wt%), feed heat Condition is bubble point feed. The number of theoretical plates in the distillation column of light components is 60, and the number of theoretical plates in the rectification column section and stripping column section of the light component refining column is 30 respectively. The operating pressure of the light-ends distillation tower and the light-ends refining tower rectification column section is 1.5 atm, and the operating pressure of the light-ends refining tower stripping column section is 1 atm. The total internal heat exchange capacity between the rectification column section and the stripping column section of the light end refining tower is 203kW. The output of the b...

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Abstract

The invention relates to an energy-saving rectifying device for integrating energy in a rectifying tower sequence and a method, wherein the device comprises a light component evaporating tower, a steam flow distributor, a steam mixer, a central condenser, a liquid flow distributor, a rectifying tower section of a light component refining tower, a stripping tower section of the light component refining tower, a reducing valve, and a flash vaporization vessel, wherein the light component evaporating tower does not have a ceiling condenser and is used for supplying high pressure steam to the rectifying tower section of the light component refining tower; the reducing valve and the flash vaporization vessel are arranged between the rectifying tower section of the light component refining tower and the stripping tower section of the light component refining tower; the internal heat exchange between the two tower sections not only can reduce the hot load consumption at the bottom of the stripping tower section of the light component refining tower, but also can reduce the condensing load consumption at the top of the rectifying tower section of the light component refining tower. Compared with the conventional multi-component rectifying and separating system, the device in the invention can greatly reduce the total energy consumption of the entire rectifying tower system, save the operation cost, and reach the purpose of saving energy and increasing efficiency.

Description

technical field [0001] The invention relates to the technical field of rectification and a rectification tower system, in particular to an energy-saving rectification device and method for energy-integrated internal energy of a rectification tower sequence. Background technique [0002] Distillation is the most widely used industrial separation method in contemporary times, and has been widely used in chemical industry, petroleum, food, light industry and other industrial sectors. Although the development of science and technology, new separation technology has begun industrial application, but in a certain period of time, the dominance of rectification technology cannot be shaken. [0003] Distillation separation technology is mature and easy to industrialize, but the disadvantage is that it consumes a lot of energy. For traditional distillation and separation, the input energy consumption accounts for more than 40% of the total industrial energy consumption, which cannot ...

Claims

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Application Information

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IPC IPC(8): B01D3/14B01D3/32
Inventor 袁希钢闫兵海刘春江罗祎青许良华曾爱武唐忠利
Owner TIANJIN UNIV
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