CN103575153A - Acrylonitrile gas cooler - Google Patents
Acrylonitrile gas cooler Download PDFInfo
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- CN103575153A CN103575153A CN201210273186.9A CN201210273186A CN103575153A CN 103575153 A CN103575153 A CN 103575153A CN 201210273186 A CN201210273186 A CN 201210273186A CN 103575153 A CN103575153 A CN 103575153A
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- Prior art keywords
- tube
- acrylonitrile
- gas cooler
- gas
- heat exchanger
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- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000001816 cooling Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000008360 acrylonitriles Chemical class 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- GUYXXEXGKVKXAW-UHFFFAOYSA-N prop-2-enenitrile Chemical compound C=CC#N.C=CC#N GUYXXEXGKVKXAW-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
本发明提供一种丙烯腈气体冷却器，包括列管式换热器，列管式换热器在其管程的进口和/或出口设有气体分配器，气体分配器包括一层圆板和多层直径渐次增大的圆环，圆板和圆环顺次间隔同心纵向排列。本发明通过在列管式换热器的进口和/或出口加设叠层式的气体分配器，平衡了周边列管和中心列管中的气速，提高了丙烯腈气体的冷却效果，增加了丙烯腈的收率。
The present invention provides an acrylonitrile gas cooler, comprising a tube-and-tube heat exchanger, the tube-and-tube heat exchanger is provided with a gas distributor at the inlet and/or outlet of the tube side, and the gas distributor includes a layer of discs and There are multiple layers of circular rings with gradually increasing diameters, and the circular plates and circular rings are sequentially arranged concentrically and vertically. The invention balances the gas velocity in the peripheral tubes and the central tubes by adding a laminated gas distributor at the inlet and/or outlet of the tube-and-tube heat exchanger, improves the cooling effect of the acrylonitrile gas, and increases the yield of acrylonitrile.
Description
技术领域 technical field
本发明涉及化工产品生产设备技术领域，具体来说，本发明涉及丙烯腈生产工艺中的一种丙烯腈气体冷却器。The invention relates to the technical field of chemical product production equipment, in particular, the invention relates to an acrylonitrile gas cooler in the acrylonitrile production process.
背景技术 Background technique
丙烯腈(Acrylonitrile)是一种无色的有辛辣气味液体，属大众基本有机化工产品，是三大合成材料——合成纤维、合成橡胶、塑料的基本且重要的原料，在有机合成工业和人民经济生活中用途广泛。Acrylonitrile (Acrylonitrile) is a colorless liquid with a pungent smell. It is a basic organic chemical product for the public. It is the basic and important raw material for the three major synthetic materials—synthetic fiber, synthetic rubber, and plastic. It is widely used in economic life.
目前丙烯腈生产主要采用丙烯氨氧化法，丙烯、氨和空气在催化剂作用下反应生成丙烯腈及相关副产物，反应后气体经旋风分离器分离后进入气体冷却器冷却，然后再进入急冷器除氨冷却，再进入吸收精制系统分离，得到主产品丙烯腈和副产品乙腈和氢氰酸等。At present, the production of acrylonitrile mainly adopts the ammoxidation method of propylene. Propylene, ammonia and air react under the action of catalyst to form acrylonitrile and related by-products. The ammonia is cooled, and then enters the absorption refining system for separation to obtain the main product acrylonitrile and by-products such as acetonitrile and hydrocyanic acid.
一般地，丙烯腈气体冷却器采用列管式换热器，长期运行难免催化剂粉末带到气体冷却器，沉积在列管内壁。由于列管式换热器进口扩径，出口缩径，周边列管中气速较低，因此催化剂粉末主要沉积在周边列管内，管径减小，导致周边列管中气速更低，催化剂粉末更易沉积，最后甚至造成周边列管堵塞，严重影响传热和丙烯腈气体冷却，造成丙烯腈收率降低。Generally, the acrylonitrile gas cooler adopts a tube-and-tube heat exchanger, and it is inevitable that the catalyst powder will be brought to the gas cooler and deposited on the inner wall of the tube after long-term operation. Because the inlet diameter of the tube-and-tube heat exchanger expands and the outlet diameter shrinks, the gas velocity in the surrounding tubes is low, so the catalyst powder is mainly deposited in the surrounding tubes, and the tube diameter decreases, resulting in lower gas velocity in the surrounding tubes, and the catalyst The powder is easier to deposit, and finally even causes the blockage of the surrounding tubes, which seriously affects the heat transfer and the cooling of the acrylonitrile gas, resulting in a decrease in the yield of acrylonitrile.
发明内容 Contents of the invention
针对上述现有技术的不足，本发明所要解决的技术问题是提供一种列管换热式丙烯腈气体冷却器，能够使其列管式换热器的周边列管和中心列管中气速相同，提高气体冷却效果。Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a tube-and-tube heat exchange type acrylonitrile gas cooler, which can make the gas velocity in the peripheral tubes and central tubes of the tube-and-tube heat exchanger Same, improves gas cooling effect.
为解决上述技术问题，本发明提供一种丙烯腈气体冷却器，包括列管式换热器，所述列管式换热器在其管程的进口和/或出口设有气体分配器，所述气体分配器包括一层圆板和多层直径渐次增大的圆环，所述圆板和所述圆环顺次间隔同心纵向排列。In order to solve the above-mentioned technical problems, the present invention provides an acrylonitrile gas cooler, comprising a tube-and-tube heat exchanger, and the tube-and-tube heat exchanger is provided with a gas distributor at the inlet and/or outlet of the tube side, so that The gas distributor includes a layer of discs and multiple layers of circular rings whose diameters gradually increase, and the discs and the circular rings are arranged concentrically and longitudinally in sequence.
可选地，所述圆环有2～10层。Optionally, the ring has 2-10 layers.
可选地，所述圆板和所述圆环之间、相邻所述圆环之间的间隔距离为1～500毫米。Optionally, the distance between the circular plate and the circular ring, and between adjacent circular rings is 1-500 mm.
可选地，所述圆板的直径为50～500毫米。Optionally, the diameter of the circular plate is 50-500 mm.
可选地，所述圆环的宽度为20～400毫米。Optionally, the width of the circular ring is 20-400 mm.
可选地，相邻的较大圆环的内孔径比较小圆环的外径小0.5～200毫米。Optionally, the inner diameter of adjacent larger rings is 0.5-200 mm smaller than the outer diameter of the smaller rings.
与现有技术相比，本发明具有以下优点：Compared with the prior art, the present invention has the following advantages:
本发明通过在列管式换热器的进口和/或出口加设叠层式的气体分配器，平衡了周边列管和中心列管中的气速，提高了丙烯腈气体的冷却效果，增加了丙烯腈的收率。The invention balances the gas velocity in the peripheral tubes and the central tubes by adding a laminated gas distributor at the inlet and/or outlet of the tube-and-tube heat exchanger, improves the cooling effect of the acrylonitrile gas, and increases the yield of acrylonitrile.
附图说明 Description of drawings
本发明的上述的以及其他的特征、性质和优势将通过下面结合附图和实施例的描述而变得更加明显，其中：The above and other features, properties and advantages of the present invention will become more apparent from the following description in conjunction with the accompanying drawings and embodiments, in which:
图1为本发明一个实施例的丙烯腈气体冷却器的简单结构示意图；Fig. 1 is the simple structural representation of the acrylonitrile gas cooler of an embodiment of the present invention;
图2为图1中所示实施例的丙烯腈气体冷却器的气体分配器的简单结构示意图。Fig. 2 is a simple structural diagram of the gas distributor of the acrylonitrile gas cooler of the embodiment shown in Fig. 1 .
具体实施方式 Detailed ways
下面结合具体实施例和附图对本发明作进一步说明，在以下的描述中阐述了更多的细节以便于充分理解本发明，但是本发明显然能够以多种不同于此描述的其它方式来实施，本领域技术人员可以在不违背本发明内涵的情况下根据实际应用情况作类似推广、演绎，因此不应以此具体实施例的内容限制本发明实际要求的保护范围。The present invention will be further described below in conjunction with specific embodiment and accompanying drawing, set forth more details in the following description so as to fully understand the present invention, but the present invention can obviously be implemented in many other ways different from this description, Those skilled in the art can make similar promotions and deductions based on actual application situations without violating the connotation of the present invention, so the content of this specific embodiment should not limit the scope of protection actually required by the present invention.
图1为本发明一个实施例的丙烯腈气体冷却器的简单结构示意图；图2为图1中所示实施例的丙烯腈气体冷却器的气体分配器的简单结构示意图。需要注意的是，这些附图均仅作为示例，其并非是按照等比例的条件绘制的，并且不应该以此作为对本发明实际要求的保护范围构成限制。Fig. 1 is a schematic diagram of a simple structure of an acrylonitrile gas cooler according to an embodiment of the present invention; Fig. 2 is a schematic diagram of a simple structure of a gas distributor of an acrylonitrile gas cooler according to the embodiment shown in Fig. 1 . It should be noted that these drawings are only examples, they are not drawn according to the same scale, and should not be taken as limitations on the protection scope of the actual claims of the present invention.
如图1所示，该丙烯腈气体冷却器至少包括列管式换热器201。该列管式换热器201在其管程的进口202和/或出口203可以设有(或者分别设有)气体分配器204。As shown in FIG. 1 , the acrylonitrile gas cooler includes at least a tube-and-
如图2所示，该气体分配器204具体可以包括一层圆板205和多层直径渐次增大的圆环206，其中圆环206可以有2～10层(为方便起见，图2中仅示例性地示出2层，但本发明并不局限于此)。圆板205和圆环206彼此顺次间隔同心纵向排列，圆板205和圆环206之间、相邻两个圆环206之间的间隔距离可以为1～500毫米(mm)。As shown in Figure 2, the
就组成该气体分配器204的各个部件而言，该圆板205的直径可以为50～500毫米，而该圆环206的宽度可以为20～400毫米。另外，在该气体分配器204中，相邻的较大的圆环206的内孔径比较小的圆环206的外径小0.5～200毫米。As far as the components of the
实施例：Example:
某丙烯腈工业生产装置的丙烯腈列管换热式气体冷却器，采用本发明的做法，在下封头上(即其内列管式换热器的管程出口上)加设气体分配器。经实际测量，管程进口温度为440℃，而管程出口温度为200℃。装置运行一年后管程出口温度略升为205℃。The acrylonitrile tube heat exchange type gas cooler of a certain acrylonitrile industrial production device adopts the method of the present invention, and a gas distributor is added on the lower head (that is, the tube side outlet of the internal tube heat exchanger). According to the actual measurement, the inlet temperature of the tube side is 440°C, while the outlet temperature of the tube side is 200°C. After one year of operation of the device, the outlet temperature of the tube side rose slightly to 205°C.
对比例：Comparative example:
某丙烯腈工业生产装置的丙烯腈列管换热式气体冷却器，未在下封头(即其内列管式换热器的管程出口上)上加设气体分配器。经实际测量，管程进口温度为440℃，而管程出口温度为215℃(较前述实施例有所上升)，气体流量与前述实施例相同。装置运行一年后管程出口温度升高为235℃(明显高于前述实施例的一年后的管程出口温度)。The acrylonitrile tube heat exchange gas cooler of an acrylonitrile industrial production unit did not add a gas distributor to the lower head (ie, the tube side outlet of the inner tube heat exchanger). According to the actual measurement, the inlet temperature of the tube side is 440°C, while the outlet temperature of the tube side is 215°C (increased from the previous embodiment), and the gas flow rate is the same as that of the previous embodiment. After one year of operation of the device, the outlet temperature of the tube side increased to 235° C. (significantly higher than the outlet temperature of the tube side after one year in the previous embodiment).
本发明通过在列管式换热器的进口和/或出口加设叠层式的气体分配器，平衡了周边列管和中心列管中的气速，提高了丙烯腈气体的冷却效果，增加了丙烯腈的收率。The invention balances the gas velocity in the peripheral tubes and the central tubes by adding a laminated gas distributor at the inlet and/or outlet of the tube-and-tube heat exchanger, improves the cooling effect of the acrylonitrile gas, and increases the yield of acrylonitrile.
本发明虽然以较佳实施例公开如上，但其并不是用来限定本发明，任何本领域技术人员在不脱离本发明的精神和范围内，都可以做出可能的变动和修改。因此，凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何修改、等同变化及修饰，均落入本发明权利要求所界定的保护范围之内。Although the present invention is disclosed above with preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention, all fall within the scope of protection defined by the claims of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210273186.9A CN103575153A (en) | 2012-08-02 | 2012-08-02 | Acrylonitrile gas cooler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210273186.9A CN103575153A (en) | 2012-08-02 | 2012-08-02 | Acrylonitrile gas cooler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109999723A (en) * | 2019-04-18 | 2019-07-12 | 中国科学院山西煤炭化学研究所 | Acrylonitrile raw material feed system |
| US11209213B2 (en) | 2017-11-17 | 2021-12-28 | Lg Chem, Ltd. | Heat exchanger |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995017952A1 (en) * | 1993-12-27 | 1995-07-06 | Borealis Polymers Oy | Fluidized-bed reactor |
| CN2740281Y (en) * | 2004-11-25 | 2005-11-16 | 浙江工业大学 | Isothermal low-pressure synthetic tower with gas distributor |
| CN101711962A (en) * | 2009-08-24 | 2010-05-26 | 中国石油化工集团公司 | Catalytic conversion stripper |
| CN201772813U (en) * | 2010-08-23 | 2011-03-23 | 中国石油化工股份有限公司 | On-line coke cleaning device |
| CN202869356U (en) * | 2012-08-02 | 2013-04-10 | 宁波科元塑胶有限公司 | Acrylonitrile gas cooler |
-
2012
- 2012-08-02 CN CN201210273186.9A patent/CN103575153A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995017952A1 (en) * | 1993-12-27 | 1995-07-06 | Borealis Polymers Oy | Fluidized-bed reactor |
| CN2740281Y (en) * | 2004-11-25 | 2005-11-16 | 浙江工业大学 | Isothermal low-pressure synthetic tower with gas distributor |
| CN101711962A (en) * | 2009-08-24 | 2010-05-26 | 中国石油化工集团公司 | Catalytic conversion stripper |
| CN201772813U (en) * | 2010-08-23 | 2011-03-23 | 中国石油化工股份有限公司 | On-line coke cleaning device |
| CN202869356U (en) * | 2012-08-02 | 2013-04-10 | 宁波科元塑胶有限公司 | Acrylonitrile gas cooler |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11209213B2 (en) | 2017-11-17 | 2021-12-28 | Lg Chem, Ltd. | Heat exchanger |
| CN109999723A (en) * | 2019-04-18 | 2019-07-12 | 中国科学院山西煤炭化学研究所 | Acrylonitrile raw material feed system |
| CN109999723B (en) * | 2019-04-18 | 2021-05-04 | 中国科学院山西煤炭化学研究所 | Acrylonitrile raw material feeding system |
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Application publication date: 20140212 |