Tar negative pressure dehydration system and method

A negative pressure dehydration and tar technology, which is applied in the direction of tar removal and processing through water, can solve the problems of increasing equipment corrosion and steam consumption, and achieve the effects of reducing the degree of corrosion, lowering the boiling point, and lowering the operating temperature

Pending Publication Date: 2019-11-22
济宁黑猫炭黑有限责任公司
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Problems solved by technology

The temperature at the bottom of the dehydration tower is around 190-220°C, which consumes a lot of steam, and at the same time causes the ammonia salt in the tar to decompose, and the hydrogen chloride produced will increase the corrosion of the equipment

Method used

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  • Tar negative pressure dehydration system and method

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Such as figure 1 As shown, a kind of tar negative pressure dehydration system of the present invention comprises tar preheater 4, tar heater 3, dehydration tower 2, anhydrous tar cooler 5, light oil cooler 1, oil-water separator 11, light oil Reflux tank 10, vacuum buffer tank 15, vacuum unit 13, oil washing tank 14 and vacuum cooler 12.

[0023] Wherein, tar preheater 4 is heat exchange equipment, is provided with tar inlet, tar outlet, anhydrous tar inlet, anhydrous tar outlet, and the tar inlet of tar preheater 4 is connected with tar delivery pump 6 through pipeline. The raw material tar is transported into the tar preheater 4 by the tar delivery pump 6, where heat is absorbed in the tar preheater 4 to realize preheating.

[0024] Tar heater 3 is heating equipment, is provided with inlet and outlet, is used for heating tar. The inlet of th...

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Abstract

The invention provides tar negative pressure dehydration system and method. According to the tar negative-pressure dehydration system, the vacuum unit, the vacuum buffer tank, the oil washing tank andthe vacuum cooler are additionally arranged on the basis of an existing tar normal-pressure dehydration system, and normal-pressure distillation is changed into negative-pressure distillation, so that the operation temperature is reduced, the corrosion degree of ammonia salt to equipment is reduced, and the steam consumption is reduced.

Description

technical field [0001] The invention relates to tar dehydration technology, in particular to a tar negative pressure dehydration system and method. Background technique [0002] The common methods of tar dehydration are as follows: The first method is pre-dehydration by heating and standing. A steam heater is installed in the tar storage tank to keep the temperature of the tar at 80-90°C. After standing for more than 36 hours, the tar can be dehydrated. The moisture in the water is removed to 2 to 3%, but the water content cannot be reduced to below 1%; the second method uses batch kettle heating and dehydration, which has the disadvantages of high energy consumption and serious pollution; the third method uses a dehydration tower to dehydrate under normal pressure, tar The mutual heat exchange with the product has the characteristics of reducing consumption. It is suitable for large-scale tar processing enterprises and can dehydrate the tar to less than 0.5%. [0003] The ...

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Application Information

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IPC IPC(8): C10C1/02
CPCC10C1/02
Inventor邵聪高成雷陈忠斌程文辉胡陈查立君曹迎峰
Owner济宁黑猫炭黑有限责任公司