Coal tar pretreatment combined system and method

A coal tar and pretreatment technology, applied in tar processing, tar removal through water, petroleum industry, etc., can solve the problems of adverse effects of coal tar processing, large loss of raw materials, high energy consumption of distillation treatment, etc.

Pending Publication Date: 2016-11-16
BEIJING HUAFU ENG
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Problems solved by technology

Distillation has high energy consumption and large loss of raw materials; after centrifugal separation, part of the water and oil will be recombined after the high-speed rotation separation process, usually 5-10% of water still exists in the separated tar, and the subsequent processing of coal tar adversely affected

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  • Coal tar pretreatment combined system and method

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specific Embodiment approach

[0020] Coal tar pretreatment combined system and method of the present invention, its preferred embodiment is:

[0021] Including coal tar raw material tanks, demulsifier tanks, separated feed buffer tanks, three-phase separators, sewage tanks, slag tanks, and oil tanks;

[0022] The coal tar raw material tank is sequentially connected with the separation feeding buffer tank through a coal tar raw material pump, an automatic backwash filter, and a static mixer, and the separation feeding buffer tank is connected with the three-phase separator. The three-phase separator is connected with the sewage tank, slag tank and oil tank respectively, and the sewage tank, slag tank and oil tank are respectively connected with the sewage pump, slag pump and oil pump, and the demulsifier tank is connected with the demulsifier tank through the demulsifier pump. connection to the static mixer described above.

[0023] The above-mentioned coal tar raw material pretreatment combined system of ...

Embodiment 1

[0041] Continuous pretreatment of medium and low temperature coal tar with an annual processing capacity of 50,000 tons, with an hourly flow rate of 6.25 tons / hour. The water content of untreated coal tar is 9.13%, and the mechanical impurity content is 8.9%. The coal tar is heated to 75°C through the heating coil of the storage tank, and after standing for 24 hours, after the oil and water in the coal tar have settled and stratified, the water content of the bottom tar is 6.5%, and the impurity content is 8.2%. After passing through the automatic backwashing device with a filtration precision of 100 μm, the impurity content in the tar is reduced to 4.3%. The filtered coal tar and demulsifier are mixed in a static mixer according to the ratio of 1000 (g): 1 (mL), and the fully mixed coal tar is allowed to stand for 5 minutes in a separate feed buffer tank, and then sent to the three-phase separation Water and impurities are further separated in the machine. The centrifugal sp...

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Abstract

The invention discloses a coal tar pretreatment combined system and method. The coal tar pretreatment combined system comprises a coal tar tank, a demulsifier tank, a separating and feeding buffer tank, a three-phase separator, a sewage tank, a slag tank, and an oil tank. The coal tar tank is connected with the separating and feeding tank through a coal tar pump, an automatic backwashing filter and a static mixer, and the demulsifier tank is connected with the static mixer through a demulsifier pump. Before separation, by adding the demulsifier, small-particle-size hydrone can be combined under the action of the demulsifier. Meanwhile, small-particle-size oil molecules can be combined to thereby break up the pattern of oil in water and water in oil thoroughly and release emulsified water from oil thoroughly. At this time, coal tar can be centrifugally separated, oil and water can be well separated and the purpose for dehydrated coal tar can be achieved.

Description

technical field [0001] The invention relates to a coal tar deep processing utilization technology, in particular to a coal tar pretreatment combination system and method. Background technique [0002] Coal tar is a dark brown, viscous oily liquid obtained in the process of carbonization and gasification of coal, and is an important chemical raw material. In recent years, with the gradual increase of coal tar output, people pay more and more attention to the deep processing and utilization of coal tar. The production of high-quality clean fuel through catalytic hydrogenation modification is an important way for the comprehensive utilization of coal tar. [0003] Coal tar usually contains a lot of water and impurities. The water contained is mainly divided into free water and emulsified water. Free water can be separated by sedimentation, but emulsified water and impurities have been completely integrated in coal tar, and oil particles will Water molecules are coated, and at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C1/00C10C1/02
CPCC10C1/00C10C1/02
Inventor 豆丙乾
Owner BEIJING HUAFU ENG
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