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A kind of separator rectification method and device thereof regulated by liquid flow rate

A clapboard rectification and liquid phase flow rate technology, applied in the direction of distillation adjustment/control, fractionation, etc., can solve the problems of multiple equipment and complicated operation, and achieve the effects of ensuring stable operation, reducing floor space, and saving equipment investment

Active Publication Date: 2015-11-18
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The US7267746 patent pointed out that the distribution ratio of the liquid entering the two sides of the partition is dynamically adjusted by separately detecting the temperature of the reflux liquid at the top of the tower and the rising gas at the bottom of the tower. This method is complicated to operate and requires a lot of equipment.

Method used

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  • A kind of separator rectification method and device thereof regulated by liquid flow rate
  • A kind of separator rectification method and device thereof regulated by liquid flow rate
  • A kind of separator rectification method and device thereof regulated by liquid flow rate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] For the refining of 4,000 tons / year of trichlorosilane, the feed composition is as follows: chlorosilane mixture feed composition: 99wt% trichlorosilane, 0.5wt% dichlorodihydrosilane, and 0.5wt% silicon tetrachloride.

[0054] The feed flow rate is 4 tons / hour, the reflux flow / feed amount is 6, the tower top temperature is 62.7°C, the tower top pressure is 300kpa, and the pressure drop across the tower is 10kpa.

[0055] There are a total of 110 theoretical trays in the partitioned rectification column, of which there are 30 theoretical trays in the public rectification section, 30 theoretical trays in the common stripping section, and 50 theoretical trays in the partition section. At the 55th theoretical plate, the discharge position is located at the 54th theoretical plate. The liquid phase flow ratio on both sides of the partition is 1:1.4, which can be realized by setting the flow controller outside the tower by the method of the above example, and the trichlorosila...

Embodiment 2

[0060] 4000 tons / year of trichlorosilane refining, the feed composition is as follows: chlorosilane mixture feed composition: trichlorosilane 95wt%, dichlorodihydrosilane 2.5wt%, silicon tetrachloride 2.5wt%.

[0061]The feed flow rate is 4 tons / hour, the reflux flow / feed amount is 7, the tower top temperature is 52.7°C, the tower top pressure is 300kpa, and the pressure drop across the tower is 10kpa.

[0062] There are a total of 110 theoretical trays in the partitioned rectification column, of which there are 30 theoretical trays in the public rectification section, 30 theoretical trays in the common stripping section, and 50 theoretical trays in the partition section. At the 55th theoretical plate, the discharge position is located at the 54th theoretical plate. The liquid phase flow ratio on both sides of the partition is 1:1.33, which can be realized by setting the flow controller outside the tower by the method of the above example, and the trichlorosilane can be refine...

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Abstract

The invention relates to a baffle plate rectification method and an apparatus adjusted by liquid phase flow rate. A flow-adjustable collect redistributor is disposed above a baffle plate of a baffle plate rectification tower. Catheters between a collect channel and a distribution box are configured to tower internal catheters (7-1) and tower external catheters (7-2), wherein the tower external catheters (7-2) pass through a flow controller out of the tower, are returned and then connected with the distribution box; the tower external catheters (7-2) present a downward inclined angle with a horizontal plane; the tower internal catheters (7-1) are mounted vertically; and the outlets of the tower internal catheter (7-1) are directly connected with the distribution box. The number of the tower internal catheters (7-1) and the tower external catheters (7-1) are determined by a flow ratio of liquids entering two sides of the baffle plate; and then an opening degree of a tower external flow controller is set. The baffle plate rectification method and apparatus can achieve effective control for gas-liquid load of the rectification tower simply and stably, and is in no need of a gas collect redistributor in rectifying chemical raw materials, thereby saving investment for equipment and guaranteeing that the baffle plate rectification tower runs stably.

Description

technical field [0001] The invention belongs to the technical field of refining chemical raw materials, and relates to a method and a device for refining raw materials by using a clapboard rectification tower. Background technique [0002] The refining technology of chemical raw materials has always been a hot topic in the chemical industry, such as trichlorosilane, dichlorodihydrosilane, and silane in the polysilicon industry; organosilicon monomers in the organic silicon industry; basic chemical raw materials such as methanol and ethanol and fine chemical products. In particular, the advanced refining technologies of dichlorodihydrosilane, trichlorosilane, and silane have been blocked by foreign technologies for a long time, and the products of many domestic polysilicon enterprises cannot meet the requirements of electronic-grade polysilicon. [0003] The traditional refining method is to obtain high-purity products through multi-stage rectification and repeated light and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/32B01D3/42
Inventor 黄国强赵虎勇刘雪艳王红星
Owner TIANJIN UNIV
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