Pulse tower for extraction

A pulse tower and extraction technology, which is applied in the field of pulse towers, can solve the problems of large resistance loss, high external energy consumption, and easy occurrence of liquid flooding in the pulse extraction tower, and achieves less environmental impact, less solvent leakage, and less liquid flooding. Effect

Inactive Publication Date: 2005-05-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For the usual pulse extraction tower, due to the direct impact of the pulse on the lower part of the tower, it is easy to flood, especially when the fluid contains more solid components or floating objects, and the resistance loss of the pulse extraction tower is also Larger, resulting in more additional energy consumption
[0004] In addition, the extraction agents (solvents) used in many extraction processes are volatile organic solvents, such as chloroform, benzene, etc., which inevitably leak (discharge) to the environment during the operation, so they have a great impact on the environment

Method used

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Embodiment 1

[0033] The wastewater of a factory contains 6.5% caprolactam and some solid coke (about 3% when the solid content is high), and the viscosity of the wastewater is also relatively large. In order to reclaim the caprolactam in the above-mentioned waste water, benzene is used as a solvent for extraction (the reason for choosing benzene is that a large amount of benzene must be used as raw material in the production of this factory, and there is already a ready-made benzene distillation tower, so it is not necessary to build a benzene distillation tower after extraction. recovery solvent benzene). The pulse sieve tray tower in this patent is now used, wherein the effective height of the sieve tray tower is 6m, and the inner diameter of the tower is 600mm. The pulse generator adopts a rotary valve-circulation pump pulse generator (see Simons A J F. Pulsed Packed Columns, in Handbook of Solvent Extraction, Edited by Lo T C, Baird M H I, Hanson C. New York: John Wiley & Sons, 1983, ...

Embodiment 2

[0038] The ammonium sulfate aqueous solution of a certain factory contains about 1% caprolactam. In order to recover the caprolactam in the aqueous solution, benzene is used as solvent for extraction (the reason for choosing benzene is that a large amount of benzene must be used as raw material in the production of the factory, and there is already a ready-made benzene distillation tower , so it is not necessary to build a benzene distillation tower after the extraction to recover the solvent benzene). The pulse packed tower in this patent is now used, wherein the inner diameter of the tower is 800mm, the effective height of the packed tower is 6.5m, and the packing layer is divided into 3 sections, which are 2m in the lower part of the tower (using 250Y stainless steel plate wave structured packing) and 2m in the middle of the tower ( Raschig ring packing is used), the upper part of the tower is 2.5m (Raschig ring packing is used), and empty tower sections are left between eac...

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Abstract

The invention discloses a pulse tower for extraction. It has a cylinder body, a valve, and a pulse generator in sequence, and a jacket is arranged outside the cylinder body, and a tower internal part is arranged inside the cylinder body, and the pulse generator is placed beside the cylinder body. The cylinder is equipped with tower internals (sieve plate or packing), and the void ratio of the lower tower internals is greater than that of the upper tower internals. The cylinder is equipped with a jacket. The pulse generator is placed next to the cylinder and connected through a valve. The advantages of the invention are: 1) The operation of the pulse extraction tower is stable and reliable, the mass transfer efficiency is high, and liquid flooding is not easy. 2) It is not easy to clog and can be applied to liquid extraction with a certain solid content. 3) There is less solvent leakage during the operation of the pulse extraction tower. The impact on the environment is small. 4) The pulse energy utilization rate is high, and the maintenance of the pulse tower is convenient.

Description

technical field [0001] The invention relates to a tower, in particular to a pulse tower for extraction. Background technique [0002] The pulse extraction tower uses a pulse generator to input pulses into the tower, so that the light and heavy liquids flow in the tower while superimposing the up and down pulsating movement, so as to generate a larger mass transfer area and perform surface renewal, thereby improving the temperature in the tower. The mass transfer state is an extraction tower with high mass transfer efficiency, which is increasingly widely used in the chemical industry, herbal medicine preparation and other related industries. [0003] For the usual pulse extraction tower, due to the direct impact of the pulse on the lower part of the tower, it is easy to flood, especially when the fluid contains more solid components or floating objects, and the resistance loss of the pulse extraction tower is also Larger, resulting in more additional e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D11/00
Inventor 何潮洪高云鹤朱明乔刘建青谢方友
Owner ZHEJIANG UNIV
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