CN204208324U - The separation equipment of crude acetonitrile and acrylonitrile - Google Patents
The separation equipment of crude acetonitrile and acrylonitrile Download PDFInfo
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- CN204208324U CN204208324U CN201420285679.9U CN201420285679U CN204208324U CN 204208324 U CN204208324 U CN 204208324U CN 201420285679 U CN201420285679 U CN 201420285679U CN 204208324 U CN204208324 U CN 204208324U
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- pallet
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- crude acetonitrile
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- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 title claims abstract description 420
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 238000000926 separation method Methods 0.000 title claims abstract description 4
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 claims abstract description 93
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000004821 distillation Methods 0.000 claims abstract description 5
- 239000012530 fluid Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 150000008360 acrylonitriles Chemical class 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 21
- 239000006096 absorbing agent Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000895 extractive distillation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model relates to the separation equipment of crude acetonitrile and acrylonitrile.Specifically, a kind of equipment comprises tower, and tower comprises top section, centre portion and bottom section.Centre portion is configured to receive and comprises the first-class of acrylonitrile, HCN, acetonitrile and water.Column structure becomes distillation first-class, and from first-class generation second, second comprises the water substantially not having acetonitrile.Produce the 3rd stream in the top section of column structure Cheng Ta, the 3rd stream comprises the part from first acrylonitrile, HCN and water.Tower comprises the crude acetonitrile concentrated area limited by the baffle plate of tower and inner surface.Column structure becomes the stream producing in the upper volume in this region and comprise water and acetonitrile, and it does not have acrylonitrile and HCN substantially.
Description
Technical field
The utility model relates to a kind of equipment and process of the improvement for the manufacture of acrylonitrile and methacrylonitrile.Specifically, the utility model relates to a kind of equipment and process of the improvement for being separated with acrylonitrile by acetonitrile.
Background technology
Known for the manufacture of the various technique of acrylonitrile and methacrylonitrile and system; Such as, U.S. Patent number 3 is seen, 399,120; 3,442,771; 5,703,268; 5,869,730; With 6,107,509.Common process provides and is separated with crude acetonitrile by acrylonitrile, and crude acetonitrile is valuable accessory substance.Common process for being separated with crude acetonitrile by acrylonitrile is usually directed to use at least two towers: the first tower and the second tower.First tower (also referred to as recovery tower) is configured to roughly be separated with acetonitrile with hydrogen cyanide (HCN) by acrylonitrile.
Fig. 1 shows the common process for being separated with crude acetonitrile by acrylonitrile.As shown in Figure 1, the incoming flow 1 from acrylonitrile absorber (not shown) is sent to the first tower 10.Incoming flow 1 comprises acrylonitrile, hydrogen cyanide (HCN), acetonitrile and water usually.Substantially do not have the current 2 of acetonitrile from the bottom of the second tower 20 or near be recycled to the top of the first tower 10, so that be separated with HCN with acrylonitrile by acetonitrile by extractive distillation.Containing acrylonitrile, HCN and from the stream 3 of the part in the water of charging 1 from the top removal of the first tower 10.Liquid stream 4 containing water and acetonitrile is sent to the second tower 20 as charging from the bottom of the first tower 10.Steam stream 5 from the second tower 20 is sent to the first tower 10, to be provided for the heat needed for the distillation in the first tower 10.Crude acetonitrile stream 6 containing acetonitrile, water and a small amount of acrylonitrile and HCN is from the top removal of the second tower 20.Substantially there is no acrylonitrile, HCN and acetonitrile and the residue current 7 not getting back to the first tower 10 as current 2 recirculation the bottom place of the second tower 20 or near discharge from the second tower 20.
Fig. 2 shows another common process for being separated with crude acetonitrile by acrylonitrile.As shown in Figure 2, the incoming flow 101 from acrylonitrile absorber (not shown) is sent to the first tower 110.Incoming flow 101 comprises acrylonitrile, hydrogen cyanide (HCN), acetonitrile and water usually.Substantially do not have the current 102 of acetonitrile from the bottom of the first tower 110 or near be recycled to the top of the first tower 110, to contribute to being separated with HCN with acrylonitrile by acetonitrile by extractive distillation.The part not being recycled to the stream 102 at top from the bottom of the first tower 110 is discharged from tower 110 as stream 107.Containing acrylonitrile, HCN and from the stream 103 of the part in the water of incoming flow 101 from the top removal of the first tower 110.Containing being sent to the second tower 120 from the water of the first tower 110 and the steam effluent 104 of acetonitrile as charging.Containing being sent to the first tower 110, for further stripping (strip) acetonitrile from the water of the second tower 120 and the liquid stream 105 of a small amount of acetonitrile.Crude acetonitrile stream 106 containing acetonitrile, water and a small amount of acrylonitrile and HCN is from the top removal of the second tower 120.Discharge from the bottom of the second tower 120 for substantially there is no the stream 108 of the water of acrylonitrile, HCN and acetonitrile.
Need conventional system and the method costliness of two Tower Systems, and two Tower Systems occupy a large amount of soil spaces.Owing to there are two towers, therefore conventional equipment and method need two pressure vessels, comprise interconnecting piping between two shells, two groups of heads, two groups of structures and two containers or tower and two blocks of soils for two containers or tower.
Utility model content
Therefore, an aspect of the present disclosure is to provide a kind of shortcoming safe, effectively and the method and apparatus of cost effective overcoming or reduce conventional method and equipment.
On the one hand, provide a kind of equipment, it comprises tower, and tower comprises top section, centre portion and bottom section.The centre portion of tower is configured to receive first-class, first-classly comprises incoming flow, and incoming flow comprises acrylonitrile, hydrogen cyanide (HCN), acetonitrile and water.Column structure becomes distillation first-class, and from first-class generation second, second comprises the water substantially not having acetonitrile.Column structure becomes into make second to be recycled to the top section of tower from the bottom section of tower.Column structure becomes generation the 3rd stream in the top section of single tower, and the 3rd stream comprises the part from first acrylonitrile, HCN and water.Tower comprises the crude acetonitrile concentrated area limited by baffle plate, and crude acetonitrile concentrated area is arranged in the centre portion of tower.Crude acetonitrile concentrated area comprises upper volume and lower volume.Column structure becomes in the upper volume of crude acetonitrile concentrated area, produce steam stream, and steam stream comprises water and acetonitrile, and it does not have acrylonitrile and HCN substantially.Crude acetonitrile concentrated area comprises the upper outlet in upper volume, and upper outlet is configured to allow the steam stream comprising water and acetonitrile substantially not having acrylonitrile and HCN to flow out tower.
On the other hand, for the technique that just acetonitrile is separated with acrylonitrile, comprise by comprise acrylonitrile, HCN, acetonitrile and water be first-classly provided to tower, distill in tower first-class produce comprise water and substantially there is no the second of acetonitrile, comprise acrylonitrile, the 3rd stream of HCN and water and comprise water and acetonitrile and substantially do not have the 4th stream of acrylonitrile and HCN.In this regard, the 4th stream has about 5 to about acetonitrile of 18 % by weight.
For the technique be separated with acrylonitrile by acetonitrile, technique comprises: be provided to tower by comprising the first-class of acrylonitrile, HCN, acetonitrile and water; And distill first-class produce comprise water and substantially there is no the second of acetonitrile, comprise acrylonitrile, the 3rd stream of HCN and water and comprise water and acetonitrile and substantially do not have the 4th stream of acrylonitrile and HCN, wherein, the 4th stream has about 5 to about acetonitrile of 18 % by weight.
Preferably, cooling the 4th stream produces and has the 5th stream that about 35 arrive about acetonitrile of 78 % by weight.
Preferably, about 6 % by weight to about 12 % by weight of the 4th stream acetonitrile fractionator is sent to.
Preferably, first speed and the ratio of the speed of second are about 1.9 to about 2.4.
Preferably, first speed and the ratio of the 3rd speed flowed are about 12 to about 15.5.
Preferably, first speed is about 257 to about 315 with the ratio of the 5th speed flowed being sent to acetonitrile fractionator.
Preferably, technique is carried out in single tower.
Preferably, the first-class centre portion being provided to tower.
Preferably, the centre portion of tower comprises baffle plate and the first inner surface.
Preferably, centre portion comprises from about 5 to about 40 pallets.
Preferably, centre portion comprises from about 10 to about 20 pallets.
Preferably, tower comprises top section, and the diameter ratio of centre portion and top section is about 1.5 to about 2.5.
Above and other aspects, features and advantages of the present disclosure are by clear from the following detailed description of its illustrated embodiment, and embodiment will read in conjunction with the accompanying drawings.
Accompanying drawing explanation
The more complete understanding of example embodiment of the present utility model and advantage thereof is by considering that accompanying drawing obtains with reference to following explanation, and in the accompanying drawings, similar reference number points out similar feature, and wherein:
Fig. 1 is the indicative flowchart of conventional equipment;
Fig. 2 is the indicative flowchart of another conventional equipment;
Fig. 3 is the indicative flowchart of the embodiment according at least one aspect of the present disclosure;
Fig. 4 is the flow chart of the method according to aspect of the present disclosure.
Detailed description of the invention
Technology and equipment of the present disclosure is explained with reference to Fig. 3.
Equipment 300 can be provided to be separated with crude acetonitrile for by acrylonitrile.As shown in Figure 3, the incoming flow 301 from acrylonitrile absorber (not shown) is sent to the first tower 310.Incoming flow 301 comprises acrylonitrile, hydrogen cyanide (HCN), acetonitrile and water usually.Incoming flow 301 can be same or similar with the incoming flow 101 shown in the incoming flow 1 shown in Fig. 1 and/or Fig. 2.
On the one hand, equipment 300 comprises single tower 310.Single tower 310 comprises top section 330, centre portion 340 and bottom section 350.The centre portion 340 of single tower 310 can be configured to reception first or incoming flow 301, and first-class 301 comprise acrylonitrile, hydrogen cyanide (HCN), acetonitrile and water.First-class 301 can be the stream from acrylonitrile absorber (not shown).First-class 301 can first-class 101 same or similar with shown in first-class 1 shown in Fig. 1 and/or Fig. 2.
Single tower 310 is configured to distillation first-class 301, and produces second 302 from first-class 301.Second 302 can comprise the water substantially not having acetonitrile.As used in this article, substantially do not have acetonitrile to be meant to have the stream of acetonitrile of about 0.0001 or less % by weight, in another aspect, about 0.00005 or less, and in another in, about 0.00004 or less.Single tower 310 can be configured to the top section 330 second 302 being recycled to single tower 310 from bottom section 350.Stream 302 can leave bottom section 350 through outlet at bottom 410 as illustrated in fig. 3, or leaves near bottom section 350.The part not being recycled to the stream 302 of top section 330 from bottom section 350 can be discharged from tower 310 as stream 307.Stream 307 can comprise water, and it does not have acrylonitrile, HCN and acetonitrile substantially.In one aspect, tower comprises top section and centre portion, and the diameter of centre portion and top section is than being about 1.5 to about 2.5, in another aspect, about 1.75 to about 2.25, and in another in, about 1.8 to about 2.
Single tower 310 can be configured in top section 330, produce the 3rd stream 303.3rd stream 303 can comprise from the acrylonitrile of first-class 301, a part for HCN and water.Single tower 310 can comprise inner surface (interior facing wall) the 346 crude acetonitrile concentrated area 342 limited by baffle plate (baffle) 344 and centre portion 340.Crude acetonitrile concentrated area 342 can be arranged in the centre portion 340 of single tower 310.Crude acetonitrile concentrated area 342 can comprise upper volume 348 and lower volume 352.Crude acetonitrile concentrated area 342 can be configured in upper volume 348, produce the 4th stream 354.4th stream 354 can be steam stream, and it comprises water and acetonitrile, does not substantially have acrylonitrile and HCN.As used in this article, acrylonitrile is not substantially had to be meant to have the stream of acrylonitrile of about 0.02 or less % by weight, in another aspect, about 0.01 % by weight or less, in another, about 0.005 % by weight or less, and more on the one hand in, about 0.001 % by weight or less.As used in this article, substantially do not have HCN to be meant to have the stream of HCN of about 0.25 or less % by weight, in another aspect, about 0.2 % by weight or less, and in another in, about 0.1 % by weight or less.In another aspect, the 4th stream has about 5 to about acetonitrile of 18 % by weight, in another aspect, about 5 to about 15 % by weight, and in another in, about 8 to about 12 % by weight.
Crude acetonitrile concentrated area 342 comprises upper outlet 356.Upper outlet 356 can be configured to permission the 4th and flow the upper volume 348 that 354 flow out crude acetonitrile concentrated area 342.4th stream 354 can flow out single tower 310 through the conduit be communicated with upper outlet 356 fluid or pipeline 358.4th stream 354 can flow to heat exchanger 360, and the steam condensing wherein in the 4th stream 354 becomes liquid, and then leaves heat exchanger 360 through conduit or pipeline 352 as the 5th stream 366.A part for stream 366 can get back to single tower 310 via conduit or pipeline 364 recirculation.In this regard, the 4th stream about 6 be sent to acetonitrile fractionator after further processing to about 12 % by weight, in another aspect, about 7 to about 11 % by weight, and in another in, about 8 to about 10 % by weight.Stream 366 can be sent to equipment (not shown) via conduit or pipeline 368 and come for further process, such as, acetonitrile and other composition (e.g., water) in stream 366 is separated.5th stream has about 35 to about acetonitrile of 78 % by weight, in another aspect, about 35 to about 65 % by weight, in another, about 40 to about 60 % by weight, and in one side again, about 45 to about 55 % by weight.
In one embodiment, crude acetonitrile concentrated area 342 can be included in the multiple pallets extended between baffle plate 344 and inner surface 346, wherein bottom tray 370 is positioned at lower volume 352 place, and top pallet 372 is positioned at upper volume 348 place, and additional tray (not shown) is between bottom tray 370 and top pallet 372.Pallet sum in crude acetonitrile concentrated area 342 can be about 5 to about 40 pallets, and in another aspect, about 10 to about 20 pallets.In an embodiment, the number of trays in crude acetonitrile concentrated area 342 can be 15 pallets, and wherein top pallet 372 is the 15 pallet.Pipeline 364 can be communicated with entrance 374 fluid of crude acetonitrile concentrated area 342.Entrance 374 can above the top pallet 372 of crude acetonitrile concentrated area 342.Entrance 374 can below the outlet 356 of upper volume 348.
Find that the recovery of acrylonitrile and acetonitrile cut can the embodiment according to Fig. 3 obtain fully in single tower surprisingly.According to the disclosure, the second tower required in conventional equipment and method can be eliminated, such as, the second tower 20 shown in Fig. 1 and the tower shown in Fig. 3 120.By eliminating needs to the second tower, do not need the feeding line going to the second tower yet, such as, conduit or the pipeline for flowing 4 shown in Fig. 1, or the conduit for effluent 104 shown in Fig. 2 or pipeline, or do not need the flow controller that is associated and valve.
Crude acetonitrile concentrated area 342 can have the outlet at bottom 376 be communicated with conduit or pipeline 378 fluid.Outlet at bottom 376 can be placed in allow from pallet 370 liquid roughly all from the position that single tower 310 removes.Such as, export 376 can be placed in and to be associated with pallet 370 and seal disc 383 place below pallet 370.Bottom stream 380 from crude acetonitrile concentrated area 342 can leave from single tower 310 through outlet 376, and then flows through pipeline 378 for processing further and/or storing.Stream 382 (it can be whole in stream 380 or it is a part of) can be back to tower 310 via the conduit be communicated with entrance 386 fluid or pipeline 384.Alternatively, bottom stream 380 from crude acetonitrile concentrated area 342 can be sent to the desired locations of tower 310 in inside, such as, to pallet 390 (as shown in Figure 3) or pallet 392, and eliminate pipeline 378 and 384 (such as, if do not need bottom stream 380 to be sent to other places).
Tower 310 can comprise the multiple pallets outside crude acetonitrile concentrated area 342.As shown in Figure 3, the multiple pallets outside crude acetonitrile concentrated area 342 can comprise pallet 388,390,392,394 and 396.Pallet 388 can be the bottom tray in bottom section 350.Pallet 390,392 and 394 can be the intermediate tray in centre portion 340.Pallet 396 can be the top pallet in section 330.Additional tray (not shown) can be located between pallet 388 and 390, between pallet 392 and 394, and between pallet 394 and 396.Pallet outside crude acetonitrile concentrated area 342 can extend across the whole horizontal cross-section of tower 310, such as, from the side or inner surface 398 extend to the pallet 388,390 of side or inner surface 400,392, and from the side or inner surface 402 extend to the pallet 396 of side or inner surface 404.Inner surface 400 can comprise inner surface 346.Additional tray outside crude acetonitrile concentrated area 342 can extend across the part of horizontal cross section of tower 310, such as pallet 394, and it extends across sidepiece 398 to baffle plate 344.The sum of the pallet in tower 310 outside crude acetonitrile concentrated area 342 can between 80 and 100 pallets.In an embodiment, the tray number in the tower 310 outside crude acetonitrile concentrated area 342 can be 90 pallets.In an embodiment, pallet 396 can be the 90th pallet be arranged in outside tower 310 crude acetonitrile concentrated area 342.
As shown in Figure 3, in an embodiment, crude acetonitrile concentrated area comprises first group of multiple pallet, and first group of multiple pallet extends between baffle plate 344 and the first inner surface 346.Pallet in first group of multiple pallet is positioned at the differing heights place of tower, and each pallet in first group of multiple pallet comprises the horizontal plane in the cross section extending across crude acetonitrile concentrated area 342.Crude acetonitrile concentrated area 342 comprises the bottom tray 370 in lower volume 352, the top pallet 372 in upper volume 348, and at least one the pallet (not shown) between the bottom tray of crude acetonitrile concentrated area and top pallet.
As shown in Figure 3, lower recirculation circuit can be provided.Lower recirculation circuit can be configured to the medial inlet 386 being recycled to the centre portion 340 of tower 310 at least partially from the outlet at bottom 376 of crude acetonitrile concentrated area 342 of stream, and medial inlet 386 is positioned at below crude acetonitrile concentrated area 342.Lower recirculation circuit can be positioned at outside tower at least partially.Alternatively, lower recirculation circuit can be positioned at tower.According to one side, equipment 300 provides, via pipeline 384, stream 380 is recycled to tower 310, and/or extracts stream 380 out via pipeline 378 and stream 380 be sent to the ability in the other places of acrylonitrile factory.
As shown in Figure 3, tower can comprise second group of multiple pallet, and second group of multiple pallet is positioned at outside crude acetonitrile concentrated area 342, wherein, pallet in second group of multiple pallet is positioned at the differing heights place of tower, and each pallet in second group of multiple pallet comprises the horizontal plane in the cross section extending across tower.
Those skilled in the art will recognize that, according to the disclosure, pallet 394 can be the pallet identical with pallet 372, and wherein, baffle plate 344 extends through pallet, but not pallet 394 is the pallet separated with pallet 372.In this alternative embodiment, pallet has the part outside crude acetonitrile concentrated area 342 and the separate section in crude acetonitrile concentrated area 342.Additional tray in centre portion 340 can have the part outside crude acetonitrile concentrated area 342 and the separate section in crude acetonitrile concentrated area 342.In another embodiment, baffle plate 344 can comprise a series of baffle plate sections, wherein, extends between the paired pallet of each baffle plate sections in first group of multiple pallet.
Stream 301 can enter tower 310 through entrance 408.Entrance 408 can between the pallet (not shown) above pallet 394 and pallet 394.Pallet 394 can between the pallet of the 58 to the 68 from bottom section 350.In an embodiment, pallet 394 is the 64th pallet from bottom section 350.
The entrance 386 of tower 310 can pallet 370 in centre portion 340 and between pallet 390.In an embodiment, pallet 390 can be between the 25 to the 33 pallet from bottom section 350, and pallet 392 can be between the 26 to 34 pallet from bottom section 350.In an embodiment, pallet 390 can be the 29th pallet from bottom section 350, and pallet 392 is the 30th pallet from bottom section 350.
The entrance 406 of tower 310 can be communicated with stream 302 fluid.Entrance 406 can be arranged in the top section 330 of tower 310.Entrance 406 can be configured to be received in tower 310 by stream 302 above pallet 396.
Stream 366 can be has acetonitrile and water and the crude acetonitrile stream substantially not having acrylonitrile and HCN.For flowing a part of 301 and can substantially there is no acrylonitrile, HCN and acetonitrile as the water that stream 307 leaves tower 310.Stream 307 can bottom section 350 place of tower 310 or near discharge.
In one aspect, flow controller 357 can be configured to regulating valve 359.In one aspect, controller 68 can be configured to process one or more signal corresponding with measurement parameter.Controller 68 can be configured to determine measurement parameter be higher than or lower than predefined parameter scope.If controller 68 can be configured to measurement parameter below or above predefined parameter scope, then adjust the operation of one or more device via communication line or radio communication (Fig. 1 is not shown).Such as, when measurement parameter is when predefined parameter scope is outer, controller 68 can be configured to adjust the flow through valve 359,379 and/or 381, the opening size of such as regulating valve.Those skilled in the art will recognize that controller 68 or similar control device can be positioned at flow controller 357 (as shown in Figure 1) at a distance, maybe can be positioned at flow controller 357 place and comprise flow controller 357.
Fig. 4 illustrates the flow chart of the method 400 according to aspect of the present disclosure.Method 400 can use the equipment shown in foregoing Fig. 3 to perform.Step 401 comprises and receives in the centre portion of tower by first-class, first-classly comprises acrylonitrile, hydrogen cyanide (HCN), acetonitrile and water.Step 402 is included in tower distills first-class and from first-class generation second, second comprises water, and it does not have acetonitrile substantially.Step 403 comprises makes second be recycled to the top section of tower from the bottom section of tower.Step 404 is included in the top section of tower and produces the 3rd stream, and the 3rd stream comprises the part from first acrylonitrile, HCN and water.Step 405 is included in the 4th stream producing in the upper volume of the crude acetonitrile concentrated area of tower and comprise water and acetonitrile, it does not have acrylonitrile and HCN substantially, crude acetonitrile concentrated area is limited by the baffle plate of the centre portion of tower and the first inner surface, and crude acetonitrile concentrated area is arranged in the centre portion of tower.Step 406 comprises permission the 4th and flows out tower.
In one aspect, this technique can use following ratio.First speed and the ratio of the speed of second are about 1.9 to about 2.4, in another aspect, about 1.9 to about 2.3, and in another in, about 2.0 to about 2.2.First speed and the ratio of the 3rd speed flowed are about 12 to about 15.5, in another aspect, about 12 to about 15, and in another in, about 12 to about 14.First speed is about 257 to about 315 with the ratio of the 5th speed flowed being sent to acetonitrile fractionator, in another aspect, about 260 to about 310, and in another in, about 275 to about 300.
Although describe the disclosure about its some preferred embodiment in the foregoing specification, and illustrate many details for demonstration object, but for those skilled in the art, it will be clear that, the disclosure easily produces additional embodiment, and some details described herein can change significantly when not departing from general principle of the present disclosure.It should be understood that feature of the present disclosure easily carries out retrofiting, change, change or replacing, and do not depart from spirit and scope of the present disclosure, or depart from the scope of claim.Such as, the size of various component, number, size and dimension can change and carry out applicable application-specific.Therefore, specific embodiment shown and described herein is only for demonstration object.
Claims (23)
1. a separation equipment for crude acetonitrile and acrylonitrile, comprising:
Tower, it comprises top section, centre portion and bottom section, and described centre portion is configured to receive first-class, describedly first-classly comprises acrylonitrile, hydrogen cyanide (HCN), acetonitrile and water;
Described column structure becomes distillation described first-class and from described first-class generation second, described second comprises the water substantially not having acetonitrile;
Described column structure becomes described second is recycled to top section from the bottom section of described tower;
Described column structure becomes generation the 3rd stream in the top section of described tower, and described 3rd stream comprises the part from described first acrylonitrile, HCN and water;
Described tower comprises the crude acetonitrile concentrated area limited by the baffle plate of the centre portion of described tower and the first inner surface, and described crude acetonitrile concentrated area is arranged in the centre portion of described tower, and described crude acetonitrile concentrated area comprises upper volume and lower volume;
Described column structure becomes generation the 4th stream in the upper volume of described crude acetonitrile concentrated area, and described 4th stream comprises water and acetonitrile, and it does not have acrylonitrile and HCN substantially;
Described crude acetonitrile concentrated area comprises the upper outlet in described upper volume, and described upper outlet is configured to allow to comprise water and acetonitrile, does not substantially have the steam stream of acrylonitrile and HCN to flow out described tower.
2. equipment according to claim 1, is characterized in that, also comprises heat exchanger, and described heat exchanger causes and receives and cool described 4th stream.
3. equipment according to claim 2, is characterized in that, also comprises cocycle loop, described cocycle loop configuration become by described 4th stream in described heat exchanger, obtain cooling at least partially after be recycled to described crude acetonitrile concentrated area.
4. equipment according to claim 3, it is characterized in that, described crude acetonitrile concentrated area comprises the upper inlet be communicated with recirculation loop fluid, and described upper inlet is configured to this part being received in described heat exchanger described 4th stream after obtaining cooling from described recirculation circuit.
5. equipment according to claim 4, is characterized in that, described upper inlet is positioned at below the upper outlet of described crude acetonitrile concentrated area.
6. equipment according to claim 5, it is characterized in that, described crude acetonitrile concentrated area comprises first group of multiple pallet, described first group of multiple pallet extends between described baffle plate and described first inner surface, wherein, pallet in described first group of multiple pallet is positioned at the differing heights place of described tower, and each pallet in described first group of multiple pallet comprises the horizontal plane in the cross section extending across described crude acetonitrile concentrated area, wherein, described crude acetonitrile concentrated area comprises the bottom tray in described lower volume, top pallet in described upper volume, and at least one pallet between the bottom tray of described crude acetonitrile concentrated area and top pallet.
7. equipment according to claim 6, is characterized in that, the pallet in described crude acetonitrile concentrated area adds up to about 5 to about 40.
8. equipment according to claim 6, is characterized in that, the pallet in described crude acetonitrile concentrated area adds up to about 10 to about 20.
9. equipment according to claim 6, is characterized in that, the upper inlet of described crude acetonitrile concentrated area is positioned at above the top pallet of described crude acetonitrile concentrated area.
10. equipment according to claim 6, is characterized in that, described crude acetonitrile concentrated area comprises outlet at bottom, and described outlet at bottom is arranged in described lower volume and below the bottom tray of described crude acetonitrile concentrated area.
11. equipment according to claim 10, is characterized in that, seal disc comprises the outlet at bottom of described crude acetonitrile concentrated area, and described seal disc is configured to receive liquid from the bottom tray of described crude acetonitrile concentrated area.
12. equipment according to claim 11, it is characterized in that, also comprise lower recirculation circuit, described lower recirculation circuit is configured to the medial inlet being recycled to the centre portion of described tower at least partially from the outlet at bottom of described crude acetonitrile concentrated area flowed the 6th, and described medial inlet is positioned at below described crude acetonitrile concentrated area.
13. equipment according to claim 12, is characterized in that, being positioned at least partially outside described tower of described lower recirculation circuit.
14. equipment according to claim 12, is characterized in that, described lower recirculation circuit is positioned at described tower.
15. equipment according to claim 6, it is characterized in that, described tower comprises second group of multiple pallet, described second group of multiple pallet is positioned at outside described crude acetonitrile concentrated area, wherein, pallet in described second group of multiple pallet is positioned at the differing heights place of described tower, and each pallet in described second group of multiple pallet comprises the horizontal plane in the cross section extending across described tower.
16. equipment according to claim 15, is characterized in that, at least one pallet in described second group of multiple pallet extends to described baffle plate from the second inner surface, and wherein, described second inner surface is separated by described baffle plate and described crude acetonitrile concentrated area.
17. equipment according to claim 16, is characterized in that, the sum of described second group of multiple pallet is between 80 and 100 pallets.
18. equipment according to claim 16, is characterized in that, described second group of multiple pallet add up to 90 pallets.
19. equipment according to claim 6, it is characterized in that, described baffle plate extends vertically through at least one pallet, and at least one pallet described has the horizontal plane in the cross section extending across crude acetonitrile region, and extends across the horizontal plane in cross section of the extra-regional described tower of described crude acetonitrile.
20. equipment according to claim 19, it is characterized in that, described tower comprises second group of multiple pallet, described second group of multiple pallet is positioned at outside described crude acetonitrile concentrated area, wherein, pallet in described second group of multiple pallet is positioned at At The Height different from each other, and each pallet in described second group of multiple pallet comprises the horizontal plane in the cross section extending across described tower.
21. equipment according to claim 6, is characterized in that, described baffle plate comprises a series of baffle plate sections, and wherein, each baffle plate sections extends between the paired pallet of described first group of multiple pallet.
22. equipment according to claim 21, it is characterized in that, described tower comprises second group of multiple pallet, described second group of multiple pallet is positioned at outside described crude acetonitrile concentrated area, wherein, pallet in described second group of multiple pallet is positioned at the differing heights place of described tower, and each pallet in described second group of multiple pallet comprises the horizontal plane in the cross section extending across described tower.
23. equipment according to claim 1, is characterized in that, the diameter of described centre portion and the diameter ratio of described top section are about 1.5 to about 2.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420285679.9U CN204208324U (en) | 2014-05-30 | 2014-05-30 | The separation equipment of crude acetonitrile and acrylonitrile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420285679.9U CN204208324U (en) | 2014-05-30 | 2014-05-30 | The separation equipment of crude acetonitrile and acrylonitrile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104027994A (en) * | 2014-05-30 | 2014-09-10 | 英尼奥斯欧洲股份公司 | Separation of crude acetonitrile and acrylonitrile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104027994A (en) * | 2014-05-30 | 2014-09-10 | 英尼奥斯欧洲股份公司 | Separation of crude acetonitrile and acrylonitrile |
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