Complete equipment for further separating methanol and water from C4

A complete set of equipment and methanol removal technology, which is applied in the field of microphase separation, can solve problems such as insufficient separation precision, increased water content, waste of water resources, etc., and achieve the effects of reducing water consumption, fast processing speed, and reducing device operating costs

Active Publication Date: 2016-06-15
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

[0010] Chinese invention patent CN105016949A discloses a method and device for deep demethanolization of C4, and proposes a method to replace the current method of incomplete extraction and insufficient separation precision of the water washing tower, relying on micro-swirl extraction technology and efficient modular coalescence separation technology Developed a C4 deep demethanolization technology to realize the deep removal of methanol in C4, but in the process of removing methanol, an appropriate amount of water must be injected to achieve full extraction. For C4 with high methanol content, a multi-stage device is used The methanol content is reduced from high to low by means of series connection. In order to realize the full extraction of each level of equipment, each level of equipment needs to be injected with water. On the one hand, this causes waste of water resources; Water injection will significantly increase the water content entrained by the subsequent C4 raw materials, resulting in some unnecessary acid consumption in the subsequent alkylation reaction

Method used

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  • Complete equipment for further separating methanol and water from C4
  • Complete equipment for further separating methanol and water from C4
  • Complete equipment for further separating methanol and water from C4

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] figure 1 It is a schematic structural diagram of the complete set of equipment in this embodiment. As shown in the figure, according to the fluid flow direction, the C4 raw material F1 and desalted water F2 enter the microphase disperser 1, and are broken into tiny droplets under the action of the shear flow field , the particle size distribution range is 10-15 μm, small droplets such as C4, methanol, and water are fully mixed and evenly distributed inside the pipeline of the micro-phase disperser 1; the mixed liquid enters the parallel micro-swirl flow extraction tube group 2 , using the variable diameter structure of the micro-swirl tube, the mixed liquid is fully extracted under the action of the centrifugal field, and the fully extracted mixed liquid enters the fluid distributor 3, and then evenly enters the first-stage coalescence separator 5 to achieve preliminary separation Enter into the secondary coalescing separator 7 again to realize deep separation of methan...

Embodiment 2

[0040] In a local refining company in Shandong, the C4 raw material in the water washing tower of the alkylation workshop contained 1,000-5,000 ppm of methanol, and the imported methanol content fluctuated widely. The consumption and amount of waste acid remain high. In response to this situation, 26 micro-swirl extraction tubes connected in parallel and secondary separation devices connected in series are used to replace the original water washing tower in the alkylation workshop, with a processing capacity of 30t / h and a temperature of 30 ~40°C, the water intake is 5%, the pressure drop of the equipment is not more than 0.06Mpa, the technical requirements are not more than 5000ppm at the inlet, and not more than 30ppm at the outlet. Table 1 shows the analysis of sampling data for equipment start-up calibration.

[0041] Table 1

[0042]

[0043] The identification results show that the original water washing tower in the alkylation workshop can be replaced by connecting ...

Embodiment 3

[0045] In a refinery company in Shandong, the C4 raw material in the water washing tower of the etherification workshop contained 40,000-50,000 ppm of methanol. The amount of acid remains high. In response to this situation, 12 micro-swirl extraction tubes connected in parallel and three-stage separation devices connected in series are used to replace the original water washing tower in the alkylation workshop. The processing capacity is 10t / h, and the temperature is 30-40°C. The water intake is 8%, the pressure drop of the equipment does not exceed 0.06Mpa, the technology requires that the gas inlet is not more than 50000ppm, and the outlet is not more than 30ppm. Table 2 shows the analysis of sampling data for equipment start-up calibration.

[0046] Table 2

[0047]

[0048] The identification results show that the parallel connection of 12 micro-swirl extraction tubes and the series connection of the three-stage separation device can replace the original water washing ...

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Abstract

The invention discloses complete equipment for further separating methanol and water from C4. The complete equipment sequentially comprises a micro-phase diffuser, a parallel-connection micro-cyclone extraction pipe group, a fluid distributor, a cascading coalescence separator and accessories such as a position gauge and a water drum according to the flow direction of fluid. C4 and water enter the micro-phase diffuser via an inlet and are broken into micro drops under the action of a shearing flow field, wherein the distribution range of a particle size is 10 to 15 micrometers, and small drops of C4, methanol and water are sufficiently mixed and uniformly distributed inside a pipeline; and the mixed liquid enters the parallel-connection micro-cyclone extraction pipe group, and the mixed liquid after being sufficiently extracted uniformly enters the fluid distributor and then enters the cascading coalescence separator. The complete equipment has the beneficial effects of being simple in structure, easy in operation, compact in structure, small in floor occupation area, short in standing time and high in separation efficiency; and the content of methanol in the processed C4 is less than or equal to 30ppm, the content of water in C4 is less than or equal to 30ppm, and the subsequent C4 further processing requirement can be met.

Description

technical field [0001] The invention belongs to the field of microphase separation, and in particular relates to a complete set of equipment for carbon four deep demethanolization and water. Background technique [0002] In 1998, the World Health Organization published a report, which showed that my country accounted for seven of the top ten cities with the most serious air pollution in the world. need. [0003] The 21st century is the century of environmental protection. People have increasingly strict environmental protection requirements for gasoline components, and put forward higher requirements for petrochemical enterprises. Refining companies must take effective measures to adjust the proportion of blending and combination, and gradually promote the use of new formula gasoline. Among the new formula gasoline, reformed oil, straight run oil, especially catalytic cracking oil will be greatly reduced, while alkylated oil will be greatly reduced due to its high octane con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/00C07C9/12C07C11/08
CPCC07C7/005C07C9/12C07C11/08
Inventor 刘森杨强卢浩许萧竺嘉斌
Owner EAST CHINA UNIV OF SCI & TECH
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