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Pyrolysis product fractional separation method and multi-inner-tower rectification device

A technology of rectification and rectification tower, which is applied in the field of multi-net tower rectification device and pyrolysis product fractionation separation, which can solve the problem of poor operating flexibility, dynamic characteristics and controllability of dividing wall rectification tower, and difficult high-purity separation of bio-oil , Operating parameters are greatly affected, etc., to achieve good operating flexibility, clear boiling range cutting, and stabilization

Inactive Publication Date: 2020-09-04
ENERGY RES INST OF SHANDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure and control of the dividing wall rectification column with two or more dividing walls tends to be complicated, and the adjustment of a certain dividing wall will have a great influence on other operating parameters, which makes the operating flexibility, dynamic characteristics and reliability of the dividing wall rectification column The controllability is poor, so the number of partition walls used is limited, generally controlled at 1 to 6, limited to the separation of 3 to 5 component systems, and it is difficult to separate high-purity bio-oil with hundreds of components

Method used

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  • Pyrolysis product fractional separation method and multi-inner-tower rectification device
  • Pyrolysis product fractional separation method and multi-inner-tower rectification device
  • Pyrolysis product fractional separation method and multi-inner-tower rectification device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: as figure 1 As shown, a rectification device with multiple inner towers is composed of an outer rectification tower 102 and seven inner rectification towers arranged inside the outer rectification tower 102, and the inner rectification towers are arranged inside the outer rectification tower 102 At different height positions, the uppermost internal rectifying tower is named as the first internal rectifying tower 1031, and the descending ones are named as the second internal rectifying tower 1032, the third internal rectifying tower 1033, the fourth internal rectifying tower 1034, The fifth inner rectification tower 1035, the sixth inner rectification tower 1036, and the seventh inner rectification tower 1037; the side wall of the outer rectification tower 102 is provided with a feed inlet 104, and the top of the outer rectification tower 102 is provided with a tower top The gas outlet 101, the bottom of the outer rectification tower 102 is provided with a ...

Embodiment 2

[0044] Embodiment 2: The similarities between this embodiment and Embodiment 1 will not be repeated, and the difference is that the tower top of the second internal rectifying tower 1032 is 0.4 meters higher than the tower top of the third internal rectifying tower 1033, and the second The inner rectifying column 1032 is filled with stainless steel θ mesh ring packing with a diameter and a height of 5 mm.

[0045] The fraction discharged from the top product valve 109 of the outer rectifying tower 102 is a colorless liquid, and the distilled volume at 30-90°C accounts for 92.7% of the sample volume during the determination of the distillation range. Viscosity increased by 3.4%; the distillate discharged from the first internal rectification tower 1031 was a colorless liquid, and the distilled volume at 90-110°C accounted for 91.7% of the sample volume during the determination of the distillation range. Heating at 80°C for 24 hours, 40°C Viscosity rises by 6.1%; the distillate ...

Embodiment 3

[0047] Embodiment 3: The similarities between this embodiment and Embodiment 1 will not be repeated, and the difference is: a rectification device with multiple inner towers, which is composed of an outer rectification tower 102 and a rectification tower arranged inside the outer rectification tower 102 It consists of 2 inner rectifying towers, the inner rectifying towers are arranged at different heights inside the outer rectifying tower 102, the upper inner rectifying tower is named as the first inner rectifying tower 1031, and the lower inner rectifying tower is named as the second inner rectifying tower Internal rectification column 1032. The feed port 104 of the outer rectification tower 102 is 0.8 meters higher than the lower end of the outer rectification tower 102 packing section; the tower top of the second inner rectification tower 1032 is 1.6 meters higher than the lower end of the outer rectification tower 102 packing section, The tower top of the distillation towe...

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Abstract

The invention discloses a pyrolysis product fractional separation method and a multi-inner-tower rectification device. The multi-inner-rectification-tower rectification device is composed of an outerrectification tower and at least two inner rectification towers arranged in the outer rectification tower. Each inner rectification tower is a dividing wall rectification tower or a pipe bundle composed of a plurality of pipes. The problem that an existing multi-component mixture separation technology is high in energy consumption and low in heat-sensitive mixture separation purity can be solved,and the method and the device are used for fractional separation of pyrolysis products such as biomass.

Description

technical field [0001] The proposal relates to the field of chemical industry, and specifically relates to a method for fractional separation of pyrolysis products and a multi-net tower rectification device, which are used in mass transfer and separation processes in the fields of chemical industry, oil refining, petrochemical, and environmental protection. Background technique [0002] With the increase of global energy consumption and the aggravation of environmental pollution, people pay more and more attention to renewable energy. Biomass energy is environmentally friendly, has a wide range of raw material sources, and is renewable, and has become an important force in the international energy transition. Pyrolysis technology can convert biomass with low energy density (straw, husk, wood chips, etc.) into bio-oil with high energy density. Based on the importance of liquid fuels in the entire energy structure, the preparation and application of bio-oil much attention. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G7/00
CPCC10G7/00
Inventor 金付强陈雷华栋梁伊晓路孙来芝许海朋李岩谢新苹杨双霞
Owner ENERGY RES INST OF SHANDONG ACAD OF SCI