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A fractionation tower circulation device and water washing method

A circulation device and fractionation tower technology, applied in hydrocarbon distillation, corrosion prevention during distillation, control/regulation of hydrocarbon oil distillation, etc., can solve problems that endanger the long-term safe operation of the device, intergranular corrosion, etc., and achieve prevention of salt formation, The effect of accurate cleaning

Inactive Publication Date: 2021-04-02
上海思九科技发展有限公司
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  • Description
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Problems solved by technology

After this part of diesel oil containing liquid water (high chloride ion content) enters the diesel hydrogenation unit, it will cause serious intergranular corrosion to the austenitic stainless steel of the diesel hydrogenation unit, endangering the long-term safe operation of the unit

Method used

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  • A fractionation tower circulation device and water washing method
  • A fractionation tower circulation device and water washing method
  • A fractionation tower circulation device and water washing method

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Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0036] figure 1 It is a structural schematic diagram of a fractionation tower circulation device provided by the present invention. see figure 1 , the device includes: fractionation tower 1, circulating pump 2, heat exchanger 3, mixer 4, oil-water separator 5, water injection port 6, first water injection valve 71, second water injection valve 72, third water injection valve 73 and the first A control valve 74 is sequentially connected to the first outlet of the fractionation tower 1, the circulation pump 2, the...

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Abstract

The embodiment of the invention discloses a fractionating tower circulating device and a water washing method. The fractionating tower circulating device comprises a fractionating tower, a circulatingpump, a heat exchanger, a mixer, an oil-water separator, a water filling port, a first water filling valve, a second water filling valve, a third water filling valve and a first control valve. According to the technical scheme provided by the embodiment, salt coagulation can be prevented, and salt coagulation positions can be accurately cleaned after salt coagulation.

Description

technical field [0001] The embodiments of the present invention relate to the field of petrochemical technology, and in particular to a fractionation tower circulation device and a water washing method. Background technique [0002] At present, with the deterioration of oil quality, the nitrogen and chloride in raw materials are increasing, and after a series of reactions, NH can be generated 4 CL or (NH 4 ) SO 4 The salt is dissolved in the liquid water at the top of the fractionation tower to form a salt solution, and the salt solution precipitates ammonium salt crystals in the fractionation tower or flows out of the fractionation tower in the form of salt solution, and reaches the pipeline in the fractionation tower circulation device, and Ammonium salt crystals precipitated in the pipeline. However, when there are many ammonium salt crystals condensed in the fractionating tower or pipeline, it will affect the normal operation of the fractionating tower circulation dev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G7/00C10G7/10C10G7/12C10G53/02
Inventor 孙虎良王思珏
Owner 上海思九科技发展有限公司
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