WO2020061977A1 - 一种芳烃溶剂油的提纯系统 - Google Patents

一种芳烃溶剂油的提纯系统 Download PDF

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Publication number
WO2020061977A1
WO2020061977A1 PCT/CN2018/108162 CN2018108162W WO2020061977A1 WO 2020061977 A1 WO2020061977 A1 WO 2020061977A1 CN 2018108162 W CN2018108162 W CN 2018108162W WO 2020061977 A1 WO2020061977 A1 WO 2020061977A1
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Prior art keywords
crystallization
tank
cooling
tank body
solvent oil
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PCT/CN2018/108162
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English (en)
French (fr)
Inventor
谈勇
谈俊
江晓龙
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鹏辰新材料科技股份有限公司
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Priority to PCT/CN2018/108162 priority Critical patent/WO2020061977A1/zh
Priority to DE212018000066.2U priority patent/DE212018000066U1/de
Publication of WO2020061977A1 publication Critical patent/WO2020061977A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0063—Control or regulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0004—Crystallisation cooling by heat exchange
    • B01D9/0013—Crystallisation cooling by heat exchange by indirect heat exchange
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets

Definitions

  • the utility model particularly relates to a purification system for aromatic solvent oil.
  • Aromatic solvents are chemicals used in the production of paints, coatings, inks and pesticides. Aromatic solvent oils should be produced with as low a content as possible of naphthalene. However, the content of naphthalene in aromatic solvent oils produced by the existing production process is still high. At present, low naphthalene-aromatic solvent oils need to be refined by distillation towers during production. Not only is the process complicated, but gaseous naphthalene enters the air and is easy to endanger human health.
  • the technical problem to be solved by the utility model is to overcome the shortcomings of the prior art, and provide an aromatic solvent oil purification system, which can efficiently remove naphthalene and improve the purity of the aromatic solvent oil, while avoiding exhausting the naphthalene into the atmosphere and crystallizing it. Forms are reused.
  • An aromatic hydrocarbon solvent oil purification system includes an aromatic hydrocarbon solvent crude oil storage tank, a crystallization device, and a finished product storage tank connected in sequence.
  • the aromatic hydrocarbon solvent oil crude storage tank communicates with the crystallization device through a pipeline.
  • the system It also includes a pre-cooling device, the pre-cooling device includes a pre-cooling tank body extending in the up-down direction and cooling circulating water filled in the pre-cooling tank body, and a part of the pipe is located in the pre-cooling device, and A portion of the pipe located inside the pre-cooling device is in a meandering distribution;
  • the crystallization device includes a crystallization tank, a cooling source provided on the top of the crystallization tank, a filter provided on the bottom of the crystallization tank, and a crystallization tank for detecting the internal temperature.
  • Thermometer the two ends of the filter screen are detachably connected to the inner side walls of opposite sides of the crystallizing tank, the middle of the filter screen is raised upward, and the finished product storage tank is connected to the crystallizing tank.
  • the bottom is connected, and the two opposite side walls of the crystallization tank are respectively provided with a naphthalene crystal discharge port, and the naphthalene crystal discharge port is located above the connection between the filter screen and the crystallization tank.
  • the two opposite side walls of the crystallization tank have inwardly recessed portions, and the inwardly recessed portions are located at the connection between the pipe and the crystallization tank and the outlet of the naphthalene crystal. between.
  • the cooling source is a refrigerator
  • the system further includes a control system communicatively connected with the refrigerator and the thermometer, respectively.
  • the purification system of the utility model is simple and efficient, which can maximize the removal of naphthalene in the aromatic solvent oil, and the removed naphthalene is collected in a crystalline form, which avoids the defects of being discharged into the atmosphere and polluting the environment in the prior art.
  • Figure 1 is a schematic diagram of the overall structure of a naphthalene purification system of the present invention
  • FIG. 2 is a schematic structural diagram of a control section
  • Aromatic solvent crude oil storage tank 1. Pre-cooling device; 21. Pre-cooling tank body; 3. Crystallization device; 31. Crystallization tank body; 311; Naphthalene crystal discharge port; 312; Inwardly recessed part 32, refrigerator, 33, filter, 34, thermometer, 4, finished product storage tank, 5, pipeline, 6, control system, 7, variable frequency pump, 8, flow meter.
  • this example provides an aromatic solvent oil purification system, which includes an aromatic hydrocarbon solvent crude oil storage tank 1, a crystallization device 3, and a finished product storage tank 4, the aromatic hydrocarbon solvent crude oil storage tank 1 and crystal The device 3 communicates via a pipe 5.
  • the system further includes a pre-cooling device 2, the pre-cooling device 2 includes a pre-cooling tank 21 extending in the up-down direction and cooling circulating water filled in the pre-cooling tank 21, and a part of the pipe 5 is located in the pre-cooling device 2, and The part of the pipe 5 located in the pre-cooling device 2 is in a meandering distribution (that is, tortuous, extending the stroke).
  • the setting of the pre-cooling device 2 can first reduce the temperature of the crude product just prepared, and then enter the crystallization device 3 to crystallize and precipitate, which can achieve the purpose of rapid cooling and precipitation.
  • the crystallization device 3 includes a crystallization tank 31, a cooling source 32 provided on the top of the crystallization tank 31, a filter 33 (a conventional filtering device that allows liquid to pass through and trap solids) provided on the bottom of the crystallization tank 31, and settings A thermometer 34 for detecting the internal temperature on the crystallizing tank 31.
  • the two ends of the filter 33 are detachably connected to the inner walls of the opposite sides of the crystallizing tank 31.
  • the middle of the filter 33 is raised upward, and the finished product is stored.
  • the tank 4 communicates with the bottom of the crystallization tank 31.
  • the two opposite sidewalls of the crystallization tank 31 are respectively provided with a naphthalene crystal discharge port 311.
  • the naphthalene crystal discharge port 311 is located at the connection between the filter 33 and the crystallization tank 31. Up.
  • the above-mentioned raised filter screen 33 in the middle can make the crystalline naphthalene gather in relatively concentrated places at both ends for easy removal, and at the same time give sufficient space for the filtered aromatic hydrocarbon solvent oil to temporarily store, and at the same time realize the integration of crystallization and separation.
  • the two opposite side walls of the crystallization tank body 31 have an inwardly recessed portion 312.
  • the inwardly recessed portion 312 is located between the connection between the pipe 5 and the crystallization tank body 31 and the naphthalene crystal discharge port 311.
  • the cooling source is a refrigerator 32, and the system further includes a frequency conversion pump 7, a flow meter 8, and a control system 6 communicatively connected to the refrigerator 32, the thermometer 34, the frequency conversion pump 7, and the flow meter 8, respectively.
  • This setting method can efficiently control the crystallization state of the entire system and has a high degree of automation, which is convenient for timely adjustment.
  • the freezing point of naphthalene and aromatic hydrocarbon oil is different, and the naphthalene is first precipitated in a crystalline form at a lower temperature, thereby achieving the purpose of removing naphthalene.

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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

一种芳烃溶剂油的提纯系统，包括依次连通的芳烃溶剂油粗品储槽(1)、结晶装置(3)和成品储槽(4)，以及预冷装置(2)。预冷装置(2)包括预冷罐体(21)和填充于预冷罐体(21)内的冷却循环水；结晶装置(3)包括结晶罐体(31)，设置于结晶罐体(31)顶部的冷却源(32)、底部的过滤网(33)、以及结晶罐体(31)上的温度计(34)，过滤网(33)的中部向上凸起、两端分别与结晶罐体(31)的相对两侧的内侧壁可拆卸地连接，结晶罐体(31)的相对两侧壁分别开设有萘结晶出料口(311)；本系统简单、高效，能够将芳烃溶剂油中的萘最大化的去除。

Description

一种芳烃溶剂油的提纯系统 技术领域
本实用新型具体涉及一种芳烃溶剂油的提纯系统。
背景技术
芳烃溶剂油是一种化学物质，用于油漆、涂料、油墨和农药的生产。芳烃溶剂油在生产时需尽量降低萘的含量，但现有的生产工艺所制得的芳烃溶剂油内萘的含量仍较高，目前低萘-芳烃溶剂油在生产时需通过蒸馏塔进行提炼，不仅工艺复杂，且气态的萘进入空气中容易危害人体健康。
实用新型内容
本实用新型所要解决的技术问题是克服现有技术的不足，提供一种芳烃溶剂油的提纯系统，其能够高效除去萘，提高芳烃溶剂油的纯度，同时避免将萘排入大气而是以结晶形式加以再利用。
为解决以上技术问题，本实用新型采取的技术方案如下：
一种芳烃溶剂油的提纯系统，所述系统包括依次连通的芳烃溶剂油粗品储槽、结晶装置和成品储槽，所述芳烃溶剂油粗品储槽与所述结晶装置通过管道连通，所述系统还包括预冷装置，所述预冷装置包括沿上下方向延伸的预冷罐体和填充于所述预冷罐体内的冷却循环水，所述管道中的部分位于所述预冷装置内，且所述管道的位于所述预冷装置内的部分呈迂回曲折分布；
其中，所述结晶装置包括结晶罐体、设置于所述结晶罐体顶部的冷却源、设置于所述结晶罐体底部的过滤网，以及设置于所述结晶罐体上用于检测内部温度的温度计，所述过滤网的两端分别与所述结晶罐体的相对两侧的内侧壁可拆卸地连接，所述过滤网的中部向上凸起，所述成品储槽与所述结晶罐体的底部连通，所述结晶罐体的相对的两侧壁分别开设有萘结晶出料口，所述萘结晶出料口位于所述过滤网与所述结晶罐体的连接处的上方。
优选地，所述结晶罐体相对的两侧壁上具有向内凹陷的部分，所述向内凹陷的部分位于所述管道和所述结晶罐体的连通处与所述萘结晶出料口之间。
优选地，所述冷却源为制冷器，所述系统还包括分别与所述制冷器、所述温度计通信连接的控制系统。
由于以上技术方案的采用，本实用新型与现有技术相比具有如下优点：
本实用新型的提纯系统简单、高效，能够将芳烃溶剂油中的萘最大化的去除，而且去除的萘以结晶形式收集，避免现有技术中排入大气进而污染环境的缺陷。
附图说明
图1为本实用新型萘提纯系统的整体结构示意图；
图2为控制部分的结构示意图；
其中，1、芳烃溶剂油粗品储槽；2、预冷装置；21、预冷罐体；3、结晶装置；31、结晶罐体；311、萘结晶出料口；312、向内凹陷的部分；32、制冷器；33、过滤网；34、温度计；4、成品储槽；5、管道；6、控制系统；7、变频泵；8、流量计。
具体实施方式
下面结合附图及本实用新型的优选实施例对本实用新型作进一步描述。
如图1-2所示，本例提供一种芳烃溶剂油的提纯系统，包括依次连通的芳烃溶剂油粗品储槽1、结晶装置3和成品储槽4，芳烃溶剂油粗品储槽1与结晶装置3通过管道5连通。
系统还包括预冷装置2，预冷装置2包括沿上下方向延伸的预冷罐体21和填充于预冷罐体21内的冷却循环水，管道5中的部分位于预冷装置2内，且管道5的位于预冷装置2内的部分呈迂回曲折分布(即弯弯曲曲，延长行程)。预冷装置2的设置可以先行降低刚制备出的粗品的温度，然后再进入结晶装置3内结晶析出，可以达到快速降温析出的目的。
其中，结晶装置3包括结晶罐体31、设置于结晶罐体31顶部的冷却源32、设置于结晶罐体31底部的过滤网33(常规的允许液体通过，截留固体的过滤设备)，以及设置于结晶罐体31上用于检测内部温度的温度计34，过滤网33的两端分别与结晶罐体31的相对两侧的内侧壁可拆卸地连接，过滤网33的中部向上凸起，成品储槽4与结晶罐体31的底部连通，结晶罐体31的相对的两侧壁分别开设有萘结晶出料口311，萘结晶出料口311位于过滤网33与结晶罐体31的连接处的上方。上述中部向上凸起的过滤网33可以使得结晶萘聚集在两端相对较集中的地方，便于取出，同时也给过滤后的芳烃溶剂油足够的空间暂时储放，同时实现结晶与分离一体化。
结晶罐体31相对的两侧壁上具有向内凹陷的部分312，向内凹陷的部分312位于管道5和结晶罐体31的连通处与萘结晶出料口311之间。上述设置方式可以使得经由管道5出来的粗品芳烃溶剂油缓缓的落在结晶罐体31内部，避免引起内部物料的剧烈震荡而造成结晶效果的降低。
冷却源为制冷器32，系统还包括依次设置在管道5上的变频泵7、流量计8，以及分别与制冷器32、温度计34、变频泵7和流量计8通信连接的控制系统6。此设置方式可以高效控制整个系统的结晶状态、自动化程度高，便于及时做出调整。
本例中是利用萘与芳烃溶剂油的冰点不同而在较低温度下先行使萘以结晶形式析出，进而达到除去萘的目的。
上述实施例只为说明本实用新型的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本实用新型的内容并据以实施，并不能以此限制本实用新型的保护范围，凡根据本实用新型精神实质所作的等效变化或修饰，都应涵盖在本实用新型的保护范围之内。

Claims (3)

  1. 一种芳烃溶剂油的提纯系统，其特征在于，所述系统包括依次连通的芳烃溶剂油粗品储槽、结晶装置和成品储槽，所述芳烃溶剂油粗品储槽与所述结晶装置通过管道连通，所述系统还包括预冷装置，所述预冷装置包括沿上下方向延伸的预冷罐体和填充于所述预冷罐体内的冷却循环水，所述管道中的部分位于所述预冷装置内，且所述管道的位于所述预冷装置内的部分呈迂回曲折分布；
    其中，所述结晶装置包括结晶罐体、设置于所述结晶罐体顶部的冷却源、设置于所述结晶罐体底部的过滤网，以及设置于所述结晶罐体上用于检测内部温度的温度计，所述过滤网的两端分别与所述结晶罐体的相对两侧的内侧壁可拆卸地连接，所述过滤网的中部向上凸起，所述成品储槽与所述结晶罐体的底部连通，所述结晶罐体的相对的两侧壁分别开设有萘结晶出料口，所述萘结晶出料口位于所述过滤网与所述结晶罐体的连接处的上方。
  2. 根据权利要求1所述的芳烃溶剂油的提纯系统，其特征在于，所述结晶罐体相对的两侧壁上具有向内凹陷的部分，所述向内凹陷的部分位于所述管道和所述结晶罐体的连通处与所述萘结晶出料口之间。
  3. 根据权利要求1所述的芳烃溶剂油的提纯系统，其特征在于，所述冷却源为制冷器，所述系统还包括分别与所述制冷器、所述温度计通信连接的控制系统。
PCT/CN2018/108162 2018-09-28 2018-09-28 一种芳烃溶剂油的提纯系统 WO2020061977A1 (zh)

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DE212018000066.2U DE212018000066U1 (de) 2018-09-28 2018-09-28 Verfeinerungssystem für aromatisches Lösungsmittelöl

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CN115746905A (zh) * 2022-11-24 2023-03-07 鹏辰新材料科技股份有限公司 一种双氧水专用溶剂油的生产方法

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CN107814678A (zh) * 2017-11-07 2018-03-20 南京师范大学 一种一体化装置提取重质c10芳烃溶剂油中萘的方法
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CN1469854A (zh) * 2000-10-17 2004-01-21 �¹���̹�����ɷ����޹�˾ 从炼焦炉粗煤气中获取萘的方法和设备
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115746905A (zh) * 2022-11-24 2023-03-07 鹏辰新材料科技股份有限公司 一种双氧水专用溶剂油的生产方法

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