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A shell-and-tube active differential pressure control bulkhead tower system

A shell-and-tube, active technology, used in chemical distillation and separation processes and equipment, and petroleum fields, can solve the problems of weak adjustment ability, inflexibility, and long adjustment period, so as to reduce investment and energy consumption, and increase the degree of uniformity. , The flexible effect of differential pressure control

Active Publication Date: 2022-01-04
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve a series of problems existing in the existing disclosed dividing wall tower: gas distribution and control are difficult, the shortcoming of the automatic distributor is a long regulation period, the range of distribution ratio is narrow and inflexible, and the adjustment ability to adapt to fluctuations is poor. Weak, it is difficult to adjust the optimal operating conditions of the next-door tower. The heat exchange area of ​​the partition plate in the traditional next-door tower is small, and the heat exchange area can be adjusted with poor sensitivity, which limits the utilization of energy in the tower

Method used

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  • A shell-and-tube active differential pressure control bulkhead tower system
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  • A shell-and-tube active differential pressure control bulkhead tower system

Examples

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Effect test

Embodiment 1

[0063] The rectification separation of BTX is benzene, toluene and p-xylene, which is separated by using the shell-and-tube type active differential pressure control dividing wall tower of the present invention. The outer diameter of the new partition tower is 200mm, the height of the composite tower section is 650mm, and the material of the distributor is stainless steel. Distributor pre-fractionation tower distribution pipe 6mm, pre-fractionation tower distribution pipe height 130mm, distributor main tower distribution pipe 8mm, main fractionation tower distribution pipe height 200mm, pre-fractionation tower outer tray diameter 6mm, opening number 60, The diameter of the tray in the main tower is 8mm, the number of openings is 80, and the wall thickness of the next tower is 1.5mm. The common rectification section of the new dividing wall column has 8 trays, the main column and the pre-fractionation column have 10 trays respectively, and the common rectification section conta...

Embodiment 2

[0076] The rectification separation of BTX is benzene, toluene and p-xylene, which is separated by using the shell-and-tube type active differential pressure control dividing wall tower of the present invention. The 4th column section of the pre-dividing tower pre-separation tower is fed, the molar fractions of benzene, toluene and p-xylene are 0.3, 0.3, and 0.4 respectively, saturated liquid is fed, the feed pressure is 2bar, and the feed temperature is 80°C. The feed flow rate was 100 kmol / hr. The total heat load of the reboiler and condenser is 66KW, the pressure of the common rectifying section at the top of the tower and the common stripping section at the bottom of the tower is 1.3 bar, and the reflux ratio at the top of the tower is 3.2. Adjust the distributor of the new-type bulkhead column, the pressures of the main column and the pre-fractionating column are 1.23bar and 1.23bar respectively, at this time, the liquid level LI101 of the pre-fractionating column in the ...

Embodiment 3

[0089] The rectification separation of BTX is benzene, toluene and p-xylene, which is separated by using the shell-and-tube type active differential pressure control dividing wall tower of the present invention. The outer diameter of the new partition tower is 300mm, the height of the composite tower section is 650mm, and the material of the distributor is stainless steel. The distribution pipe of the distributor pre-fractionation tower is 8mm, 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 outer tray of the pre-fractionation tower is 6mm, and the number of openings is 85, The diameter of the inner tray of the main tower is 8mm, the number of openings is 75, the wall thickness of the next wall tower is 1.5mm, and the dimensions of other tower sections and next door towers are consistent...

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Abstract

The invention belongs to the field of petroleum and chemical distillation separation technology and equipment technology, and provides a shell-and-tube type active differential pressure regulating partition tower system, which includes a public rectification section, a shell-and-tube partition section, and a public stripping section. The bulkhead section consists of a main tower, a pre-separation tower and an active gas phase distributor; the bulkhead section is connected by N shell-and-tube tower sections with coaxial seals; the interior of the tower sections is airtightly divided to form the space for the main tower and the pre-separation tower. The shell-and-tube active differential pressure controlled dividing wall column coordinates the gas phase load and differential pressure of the main pre-separation column through the dual effects of the opening ratio on the inner and outer trays of the active gas phase distributor and the liquid level of the gas phase distribution pipe. The adjustment range of the distribution ratio increases to 0.05-1. The new shell-and-tube active partition tower has a large and flexible heat exchange area, which can realize the step-by-step adjustment of the gas-saving and liquid phases of the main pre-separation tower. It is safe and effective, saves energy, and is easy to operate. It is suitable for various precision Distillation process.

Description

technical field [0001] The patent of the present invention relates to a shell-and-tube type active differential pressure control partition tower system, which belongs to the field of petroleum and chemical distillation separation technology and equipment technology. Background technique [0002] Distillation technology is widely used in chemical, pharmaceutical, fine chemical and other industries. Distillation accounts for more than 90% of the separation process, while the thermodynamic efficiency is only in the range of 5-20%, and the investment and energy consumption are relatively high. In order to improve the distillation efficiency and realize the sustainable utilization of energy, in-depth exploration and research on distillation technology is of great significance to the development of my country's chemical industry. In recent years, more and more attention has been paid to the research and industrial application of rectification energy-saving technologies such as par...

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 刘宏邹雄董宏光朱炜玄
Owner DALIAN UNIV OF TECH