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A heat-integrated shell-and-tube type dividing wall tower system

A technology that integrates shell-and-tube and partition towers is applied in the fields of petroleum and chemical distillation separation processes and equipment. It can solve the problems of inability to flexibly distribute heat exchange area, small pressure adjustment range, and increase equipment investment, so as to achieve flexible pressure difference regulation, The effect of improving thermal efficiency and reducing energy consumption

Active Publication Date: 2021-09-24
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pressure adjustment range of the gas regulating device is small and limited. The separation process introduces two fans, and the flow rate is adjusted by the frequency of the fans, which increases the total equipment investment.
[0007] The invention proposes a heat-integrated shell-and-tube partition tower system. The tower section of the main pre-fractionation tower in the next-wall section adopts a heat-integrated shell-and-tube structure, which effectively solves the problem that the heat exchange area cannot be flexibly allocated, and improves the efficiency of the tower. thermal efficiency, saving energy consumption

Method used

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  • A heat-integrated shell-and-tube type dividing wall tower system
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  • A heat-integrated shell-and-tube type dividing wall tower system

Examples

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Effect test

Embodiment 1

[0047] The rectification and separation of BTX materials are benzene, toluene and p-xylene, and the heat-integrated shell-and-tube type partition wall column of the present invention is used for separation. The outer diameter of the new partition tower is 200mm, the height of the composite tower is 650mm, and the distributor is made of stainless steel. The distribution pipe of the pre-fractionation tower of the distributor is 6mm, the height of the distribution pipe of the pre-fractionation tower is 130mm, the distribution pipe of the main tower of the distributor is 8mm, the height of the distribution pipe of the main fractionation tower is 200mm, the diameter of the tray in the common section is 8mm, and the number of openings is 80. The diameter of the outer tray of the fractionation tower is 6mm, the number of openings is 60, the diameter of the tray in the main tower is 8mm, the number of openings is 80, and the wall thickness of the partition tower is 1.5mm. The public r...

Embodiment 2

[0061] The rectification and separation of BTX materials are benzene, toluene and p-xylene, and the heat-integrated shell-and-tube type dividing wall column of the present invention is used for separation. The number of openings is 70, and the dimensions of other novel partition towers and tower sections are the same as in Example 1. The 5th column section of the pre-fractionation tower of the dividing wall tower is fed, the mole fractions of benzene, toluene and p-xylene are 0.3, 0.3 and 0.4 respectively, the saturated liquid is fed, the feeding pressure is 2 bar, and the feeding temperature is 80 ℃, The feed flow was 100 kmol / hr. The total load of the reboiler and the condenser is 72KW, the pressure of the common distillation section at the top of the column and the common stripping section at the bottom of the column is 1.3bar, and the reflux ratio at the top of the column is 3.2. Adjust the new partition tower distributor, the pressure of the main tower and the pre-fracti...

Embodiment 3

[0075] The rectification and separation of BTX materials are benzene, toluene and p-xylene, and the heat-integrated shell-and-tube type partition wall column of the present invention is used for separation. The outer diameter of the new partition tower is 300mm, the height of the composite tower is 650mm, and the distributor is made of stainless steel. The distribution pipe of the pre-fractionation tower of the distributor is 8 mm, the height of the distribution pipe of the pre-fractionation tower is 130 mm, the distribution pipe of the main tower of the distributor is 8 mm, the height of the distribution pipe of the main fractionation tower is 200 mm, the aperture of the outer tray of the pre-fractionation tower is 6 mm, and the number of openings is 85. The diameter of the tray in the main tower is 8 mm, the number of openings is 75, and the wall thickness of the partition wall is 1.5 mm. The public rectification section of the new type of partition tower has 8 trays, the ma...

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Abstract

The invention belongs to the field of petroleum and chemical distillation separation technology and equipment technology, and provides a heat-integrated shell-and-tube partition tower system, which includes a public rectification section, a shell-and-tube partition section, and a public stripping section. The bulkhead section adopts N shell-and-tube tower sections coaxially sealed and connected; the airtight separation in the tower section forms the main tower and the pre-separation tower; the main pre-separation tower section is nested with 1#, 2# inner trays, 1#, 2 #The outer tray forms a double-tray structure, which increases the mass transfer area. The gas phase of the shell-and-tube dividing wall tower is regulated by the synergistic effect of the number of openings on the main pre-dividing tray, the pipe diameter, and the gas phase distribution pipes in the common section, which increases the uniformity and adjustment range of the gas phase distribution. The new shell-and-tube dividing wall tower has a large and flexible heat transfer area, which can realize the step-by-step adjustment of the gas-saving liquid phase of the main pre-separation tower. It is safe and effective, saves energy, and is easy to operate. It is suitable for various distillation processes such as normal pressure and pressurization. .

Description

technical field [0001] The patent of the invention relates to a heat-integrated shell-and-tube bulkhead tower system, which belongs to the technical field of petroleum and chemical distillation separation process and equipment. Background technique [0002] Distillation technology is widely used in chemical, pharmaceutical and fine chemical fields. Distillation accounts for more than 90% of the entire separation system. Due to the irreversibility of thermodynamics in rectification separation, the efficiency is only 5-20%, and the investment and energy consumption are high. It is of great significance to the development of my country's chemical industry to improve the efficiency of rectification, realize the optimization of energy saving, and study the energy-saving technology of rectification. In recent years, as a rectification energy-saving technology, its industrial application has received more and more attention. [0003] As a new type of rectification column with inte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/14B01D3/42
CPCB01D3/141B01D3/143B01D3/42
Inventor 刘宏董宏光邹雄吕文东
Owner DALIAN UNIV OF TECH