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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- acrylonitrile
- gas cooler
- annulus
- gas
- heat exchanger
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Abstract
The invention provides an acrylonitrile gas cooler comprising a shell-and-tube heat exchanger. A tube pass inlet and/or a tube pass outlet of the shell-and-tube heat exchanger are provided with a gas distributor. The gas distributor comprises a round plate and a plurality of rings with gradually increasing diameter. The round plate and the rings are sequentially, concentrically and longitudinally arranged at intervals. The stacked gas distributor is added to the inlet and/or outlet of the shell-and-tube heat exchanger, the speed of gas in peripheral bundled tubes and central bundled tubes is balanced, cooling effect of acrylonitrile gas is improved, and yield of acrylonitrile is increased.
Description
Technical field
The present invention relates to chemical products production equipment technical field, specifically, the present invention relates to a kind of acrylonitrile gas cooler in process for production of acrylonitrile.
Background technology
Acrylonitrile (Acrylonitrile) is a kind of colourless pungent smell liquid that has, belong to popular basic organic chemical industry product, three large synthetic material---the basic and important raw materials of synthetic fibers, synthetic rubber, plastics, of many uses in organic synthesis industry and people's economic life.
Acrylonitrile process mainly adopts propylene ammmoxidation process at present, propylene, ammonia and air react and generate acrylonitrile and associated byproducts under catalyst action, it is cooling that the rear gas of reaction enters gas cooler after cyclone separator separation, and then enter quencher except ammonia cooling, enter again and absorb refining system separation, obtain major product acrylonitrile and byproduct acetonitrile and hydrogen cyanide etc.
Usually, acrylonitrile gas cooler adopts tubular heat exchanger, moves for a long time unavoidable catalyst fines and takes gas cooler to, is deposited on tubulation inwall.Due to tubular heat exchanger import hole enlargement, outlet undergauge, in periphery tubulation, gas speed is lower, therefore catalyst fines major sedimentary is in periphery tubulation, and caliber reduces, and causes in periphery tubulation gas speed lower, catalyst fines more easily deposits, finally even cause periphery tubulation to stop up, have a strong impact on and conduct heat and acrylonitrile gas cooled, cause acrylonitrile yield to reduce.
Summary of the invention
For above-mentioned the deficiencies in the prior art, technical problem to be solved by this invention is to provide a kind of tubular heat exchange type acrylonitrile gas cooler, can make the periphery tubulation of its tubular heat exchanger identical with gas speed in the tubulation of center, improves gas cooled effect.
For solving the problems of the technologies described above, the invention provides a kind of acrylonitrile gas cooler, comprise tubular heat exchanger, described tubular heat exchanger is provided with gas distributor in import and/or the outlet of its tube side, described gas distributor comprises the annulus that one deck plectane and multilayer diameter increase gradually, and described plectane and described annulus be the concentric longitudinal arrangement in interval in turn.
Alternatively, described annulus has 2～10 layers.
Alternatively, the spacing distance between described plectane and described annulus, between adjacent described annulus is 1～500 millimeter.
Alternatively, the diameter of described plectane is 50～500 millimeters.
Alternatively, the width of described annulus is 20～400 millimeters.
Alternatively, the adjacent external diameter compared with the smaller annulus of internal orifice dimension of large circle is little 0.5～200 millimeter.
Compared with prior art, the present invention has the following advantages:
The present invention adds terrace gas distributor by the import at tubular heat exchanger and/or outlet, balance the gas speed in periphery tubulation and center tubulation, improved the cooling effect of acrylonitrile gas, increased the yield of acrylonitrile.
Accompanying drawing explanation
The above and other features of the present invention, character and advantage become more obvious by the description by below in conjunction with drawings and Examples, wherein:
Fig. 1 is the simple structure schematic diagram of the acrylonitrile gas cooler of one embodiment of the invention;
Fig. 2 is the simple structure schematic diagram of gas distributor of the acrylonitrile gas cooler of embodiment shown in Fig. 1.
The specific embodiment
Below in conjunction with specific embodiments and the drawings, the invention will be further described; set forth in the following description more details so that fully understand the present invention; but the present invention obviously can implement with the multiple alternate manner that is different from this description; therefore those skilled in the art can do similar popularization, deduction according to practical situations without prejudice to intension of the present invention in the situation that, should be with the protection domain of the content constraints actual requirement of the present invention of this specific embodiment.
Fig. 1 is the simple structure schematic diagram of the acrylonitrile gas cooler of one embodiment of the invention; Fig. 2 is the simple structure schematic diagram of gas distributor of the acrylonitrile gas cooler of embodiment shown in Fig. 1.It should be noted that these accompanying drawings are all only as example, it is not to draw according to the condition of equal proportion, and should not using that this is construed as limiting as the protection domain to actual requirement of the present invention.
As shown in Figure 1, this acrylonitrile gas cooler at least comprises tubular heat exchanger 201.This tubular heat exchanger 201 is in the import 202 of its tube side and/or export 203 and can be provided with (or being respectively equipped with) gas distributor 204.
As shown in Figure 2, this gas distributor 204 specifically can comprise the annulus 206 that one deck plectane 205 and multilayer diameter increase gradually, wherein annulus 206 can have 2～10 layers (for simplicity, in Fig. 2, only exemplarily illustrate 2 layers, but the present invention is not limited thereto).Plectane 205 and annulus 206 be the concentric longitudinal arrangement in interval in turn each other, and the spacing distance between plectane 205 and annulus 206, between adjacent two annulus 206 can be 1～500 millimeter (mm).
With regard to forming all parts of this gas distributor 204, the diameter of this plectane 205 can be 50～500 millimeters, and the width of this annulus 206 can be 20～400 millimeters.In addition, in this gas distributor 204, the external diameter of the annulus 206 that the internal orifice dimension of adjacent larger annulus 206 is smaller is little 0.5～200 millimeter.
Embodiment:
The acrylonitrile tubular heat exchange type gas cooler of certain acrylonitrile industrial installation, adopts way of the present invention, and on low head, (being in the tube side outlet of tubular heat exchanger in it) adds gas distributor.Through actual measurement, tube side inlet temperature is 440 ℃, and tube side outlet temperature is 200 ℃.After device moves 1 year, tube side outlet temperature is slightly upgraded to 205 ℃.
Comparative example:
The acrylonitrile tubular heat exchange type gas cooler of certain acrylonitrile industrial installation does not add gas distributor on low head (being in the tube side outlet of tubular heat exchanger in it).Through actual measurement, tube side inlet temperature is 440 ℃, and tube side outlet temperature is 215 ℃ (compared with previous embodiment, rising to some extent), and gas flow is identical with previous embodiment.Device operation after 1 year tube side outlet temperature to raise be 235 ℃ (apparently higher than the tube side outlet temperatures behind a year of previous embodiment).
The present invention adds terrace gas distributor by the import at tubular heat exchanger and/or outlet, balance the gas speed in periphery tubulation and center tubulation, improved the cooling effect of acrylonitrile gas, increased the yield of acrylonitrile.
Although the present invention with preferred embodiment openly as above, it is not for limiting the present invention, and any those skilled in the art without departing from the spirit and scope of the present invention, can make possible change and modification.Therefore, every content that does not depart from technical solution of the present invention, any modification, equivalent variations and the modification above embodiment done according to technical spirit of the present invention, within all falling into the protection domain that the claims in the present invention define.
Claims (6)
1. an acrylonitrile gas cooler, comprise tubular heat exchanger (201), described tubular heat exchanger (201) is provided with gas distributor (204) in import (202) and/or the outlet (203) of its tube side, described gas distributor (204) comprises the annulus (206) that one deck plectane (205) and multilayer diameter increase gradually, and described plectane (205) and described annulus (206) be the concentric longitudinal arrangement in interval in turn.
2. acrylonitrile gas cooler according to claim 1, is characterized in that, described annulus (206) has 2～10 layers.
3. acrylonitrile gas cooler according to claim 2, is characterized in that, the spacing distance between described plectane (205) and described annulus (206), between adjacent described annulus (206) is 1～500 millimeter.
4. acrylonitrile gas cooler according to claim 3, is characterized in that, the diameter of described plectane (205) is 50～500 millimeters.
5. acrylonitrile gas cooler according to claim 4, is characterized in that, the width of described annulus (206) is 20～400 millimeters.
6. acrylonitrile gas cooler according to claim 6, is characterized in that, the adjacent external diameter compared with the smaller annulus of internal orifice dimension (206) of large circle (206) is little 0.5～200 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210273186.9A CN103575153A (en) | 2012-08-02 | 2012-08-02 | Acrylonitrile gas cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210273186.9A CN103575153A (en) | 2012-08-02 | 2012-08-02 | Acrylonitrile gas cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103575153A true CN103575153A (en) | 2014-02-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210273186.9A Pending CN103575153A (en) | 2012-08-02 | 2012-08-02 | Acrylonitrile gas cooler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103575153A (en) |
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 |
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| WD01 | Invention patent application deemed withdrawn after publication |