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Deep evaporating method for phenol hydroxylated liquid detarring tower

A technology of phenol hydroxylation solution and detar tower is applied in steam generation method using heat carrier, chemical instrument and method, tar processing by distillation method, etc., to improve product quality stability, improve working environment, and easy to handle. Effect

Inactive Publication Date: 2012-12-05
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art, to provide a phenol hydroxylation that can remove tar in the phenol hydroxylation solution, avoid the situation that the production is affected by the clogging of equipment and pipelines due to materials, and thus realize continuous and stable production. Deep steaming method for liquid detarring tower

Method used

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  • Deep evaporating method for phenol hydroxylated liquid detarring tower
  • Deep evaporating method for phenol hydroxylated liquid detarring tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The distillation condensation process of embodiment 1 feed intake 1.0 kilograms / hour hydroquinone tar

[0018] In the rectification tower 1, the side line liquid phase material inlet 8 is fed with a feed rate of 1.0 kg / h, and the rectification tower tower liquid is injected into the bottom reboiler 2 and the biaxial stirring through the tower bottom material outlet 7 through the circulation pump 6 Reboiler 3, control the flow of heat transfer oil, control the temperature in the bottom reboiler and the twin-shaft stirring reboiler at 210°C, control the internal pressure of the rectification tower and the twin-shaft stirring reboiler to 5KPa, and control the internal pressure of the tower bottom reboiler And after the material in the twin-shaft stirring reboiler is heated, the volatile components become steam and enter the rectification tower through the pipeline through the side line gas phase material inlet, and the evaporation rate is 0.9 kg / hour, and the gas phase at t...

Embodiment 2

[0020] The distillation condensation process of embodiment 2 feeding intake 1.5 kilograms / hour hydroquinone tar

[0021] In the rectifying tower 1, the side line liquid phase material inlet 8 is fed with a feed rate of 1.5 kg / h, and the rectifying tower tower liquid is injected into the bottom reboiler 2 and the twin-shaft stirring through the tower bottom material outlet 7 through the circulation pump 6 Reboiler 3, control the flow of heat transfer oil, control the temperature in the bottom reboiler and the twin-shaft stirring reboiler at 215°C, control the internal pressure of the rectification tower and the twin-shaft stirring reboiler to 7KPa, and control the internal pressure of the bottom reboiler And after the material in the biaxial stirring reboiler is heated, the volatile components become steam and enter the rectification tower through the side line gas phase material inlet through the pipeline, and the evaporation rate is 1.2 kg / hour, and the gas phase at the top of...

Embodiment 3

[0023] The distillation condensation process of embodiment 3 feeding intake 2.0 kilograms / hour hydroquinone tar

[0024] In the rectification tower 1, the side line liquid phase material inlet 8 is fed with a feed rate of 2.0 kg / h, and the rectification tower tower bottom liquid passes through the tower bottom material outlet 7 and enters the tower bottom reboiler 2 and twin-shaft stirring through the circulation pump 6 Reboiler 3, control the flow rate of the heat transfer oil, control the temperature in the bottom reboiler and the twin-shaft stirring reboiler at 220°C, control the pressure in the rectification tower and the twin-shaft stirring reboiler to 10KPa, and the bottom reboiler And after the material in the biaxial stirring reboiler is heated, the volatile components become steam and enter the rectification tower through the side line gas phase material inlet through the pipeline, and the evaporation rate is 1.5 kg / hour, and the gas phase at the top of the rectificati...

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Abstract

The invention discloses a deep evaporating method for a phenol hydroxylated liquid detarring tower, which comprises the following steps of: (1) feeding at a lateral line liquid phase material inlet in a rectifying tower, and pumping the tower bottoms in the rectifying tower into a bottom reboiler and a double-shaft stirring reboiler by a bottom material outlet through a circulating pump; (2) after heating the materials entering from the tower into the double-shaft stirring reboiler, changing the volatile components into steam and then distilling the steam entering the rectifying tower by a lateral line gas phase material inlet through a pipeline, changing a top gas phase of the rectifying tower into condensate after heat exchange with a condenser and soft water, and extracting part of condensate from a material extracting port on a side wall of the tower top; and (3) changing the soft water in the condenser into steam after the soft water exchanges heat with the top gas phase of the rectifying tower, and then enabling the soft water to enter a steam drum through a pipe, and conveying the steam in the steam drum to other low pressure steam users when the steam pressure reaches the set pressure. According to the method, the stability of the product quality and the running reliability of the devices are improved.

Description

technical field [0001] The invention relates to a deep steaming method for a phenol hydroxylation liquid detarring tower. Background technique [0002] Such as figure 1 As shown, the general detarring distillation method of phenol hydroxylation liquid usually adopts common reboiler and cold water is used as cooling medium, but for phenol hydroxylation liquid, the high freezing point material therein, the traditional method commonly used by people has been It is no longer suitable for use. In the production process, cold water is used as the cooling medium flow rate, and various problems will often occur if the temperature is not well controlled, making it difficult to control the temperature of the top material. When the temperature is lower than its freezing point, the material will be in the form of crystals. Precipitation will often block equipment, pipelines and even pumps. If the heat medium of the reboiler at the bottom of the tower is not well controlled, tar will co...

Claims

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Application Information

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IPC IPC(8): B01D3/14B01D3/32B01D3/42C10C1/04C10C1/08C07C39/08C07C37/74F22B1/18
Inventor 冯惠生王强夏明明刘叶凤徐菲菲
Owner TIANJIN UNIV
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