CN208944112U - A kind of adiponitrile cyanation device - Google Patents
A kind of adiponitrile cyanation device Download PDFInfo
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- CN208944112U CN208944112U CN201821368394.6U CN201821368394U CN208944112U CN 208944112 U CN208944112 U CN 208944112U CN 201821368394 U CN201821368394 U CN 201821368394U CN 208944112 U CN208944112 U CN 208944112U
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- reactor
- tubulation
- shell
- adiponitrile
- lower head
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Abstract
The utility model discloses a kind of adiponitrile cyanation devices, including reactor shell, feature is that the upper end of reactor shell is provided with upper cover, reacting material outlet is provided at the top of upper cover, reactor tubulation is provided in reactor enclosure body, the draw ratio of reactor tubulation is 0.01 ~ 0.02, the caliber of reactor tubulation and the diameter of reactor shell are than 0.015 ~ 0.04, the lower end of reactor shell is provided with the lower head with insulation jacket, the external wall of upper portion of lower head is provided with ammonia feed pipe, ammonia feed pipe protrudes into the center of inside of lower head and the export direction of ammonia feed pipe is downward, the lower sides of lower head are provided with the opposite melting adipic acid/catalyst feeds and diluent import in position, the bottom center of lower head is provided with reacting material outlet, advantage is that material can be sufficiently mixed , contact area is big, and heat transfer rate is fast, and material is uniformly mixed, and can reduce the coking of tubulation inner wall and material depositional phenomenon.
Description
Technical field
The utility model relates to a kind of adiponitrile cyanation devices.
Background technique
Adipic acid ammoniation process is a kind of important method for preparing adiponitrile at present, and adipic acid and excess of ammonia are urged in phosphoric acid
It is sent into adiponitrile reactor in the presence of agent, the endothermic reaction is carried out within the temperature range of 265-295 DEG C, generates adipic acid two
Then ammonium passes through two step thermal dehydrations, generate adiponitrile.Existing cyanation device gas material is direct after central tube submitting
It is bubbled, flows up.Gas phase stream compares concentration, ammonia flow and liquid phase insufficient contact in this way, and bubbling effect is bad, reaction yield
It is low.By-product is more simultaneously can make in reactor that coking is serious, make the reduction of reactor tubulation inner transmission matter efficiency, under heat transfer rate
Drop, while influencing the cycle of operation of reactor.
Summary of the invention
The technical problem to be solved by the utility model is to provide a kind of materials to be sufficiently mixed, and contact area is big, heat exchange
Speed is fast, and material is uniformly mixed, and can reduce the adiponitrile cyanation device of the coking of tubulation inner wall and material depositional phenomenon.
Technical solution adopted by the utility model to solve the above technical problems is as follows: a kind of adiponitrile cyanation device, packet
Reactor shell is included, the upper end of the reactor shell is provided with upper cover, reaction is provided at the top of the upper cover
Material outlet, is provided with reactor tubulation in the reactor enclosure body, and the draw ratio of the reactor tubulation is 0.01 ~
0.02, the diameter of the caliber of the reactor tubulation and the reactor shell is than 0.015 ~ 0.04, the reactor
The lower end of shell is provided with the lower head with insulation jacket, and the external wall of upper portion of the lower head is provided with ammonia feed pipe,
The ammonia feed pipe protrudes into the center of inside of the lower head and the export direction of the ammonia feed pipe is downward, institute
The lower sides for the lower head stated are provided with the opposite melting adipic acid/catalyst feeds and diluent import in position, described
The bottom center of lower head be provided with reacting material outlet.
Thin tubesheet on one is welded at the top of the reactor tubulation, the upper surface loop of the upper thin tubesheet has one
Upper thickness tube sheet, the bottom of the reactor tubulation are welded with thin tubesheet, and the lower surface loop of the lower thin tubesheet has
Thick tube sheet once.Since the operation temperature of equipment is higher, the expansion of tubulation is serious, and using this structure, tubulation can pass through light wall pipe
Plate free wxpansion reduces tubulation deformation.
Between the inner wall of the upper thin tubesheet and the reactor shell and the lower thin tubesheet and described
It is tightly connected respectively between the inner wall of reactor shell, the upper end of the reactor tubulation is corresponding on the upper thin tubesheet
Mounting hole be tightly connected, the lower end of the reactor tubulation and mounting hole corresponding on the lower thin tubesheet sealing company
It connects.
The top shell side of the reactor tubulation is provided with shell side Heating medium, the lower case of the reactor tubulation
Journey is provided with the outlet of shell side heating agent.
The outer wall of the reactor shell is provided with expansion joint.It avoids leading to shell since the operation temperature of equipment is higher
Deformation.
The exit of the ammonia feed pipe is provided with the feed distributor of seedpod of the lotus head, the feed distributor position
In melting adipic acid/catalyst feeds top.Ammonia feed pipe is the vertical court in vertical axis direction in equipment
Under vertical tube, while pipe end increase shower nozzle, this setup be conducive to ammonia and return material it is uniform in equipment
Distribution, while the liquid phase material mass transfer with entrance device bottom.
Integrally connected between the lower head and the reactor shell by the reverse frustoconic shell with insulation jacket
It connects.Reverse frustoconic shell structure can be such that gas uniformly spreads around, and it is uniform in each tubulation to be conducive to ammonia flow
Distribution, strength imparting material wash away tubulation inner wall.
Compared with the prior art, the advantages of the utility model are: the utility model one kind is using adipic acid and ammonia as raw material
It is reacted, the equipment for producing adiponitrile, primarily to solving in the production process of existing adiponitrile, since material is reacting
Coking in device can make the reduction of reactor tubulation inner transmission matter efficiency, heat transfer rate decline, while influencing the cycle of operation of reactor
Problem.Equipment is mainly by reactor shell, reactor tubulation, upper lower perforated plate, with the lower head for feeding nozzle and with discharge nozzle
Upper cover composition, which increases apparatus casing size and reduces tubulation caliber, so that material contact area is become larger, change
Thermal velocity is fast, and heat exchange more evenly, and can reduce the phenomenon that coking of tubulation inner wall and material deposit.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model adiponitrile cyanation device.
Specific embodiment
The utility model is described in further detail below in conjunction with figure embodiment.
Specific embodiment
A kind of adiponitrile cyanation device, as shown in Figure 1, including reactor shell 1, the upper end of reactor shell 1 is arranged
There is upper cover 2, the top of upper cover 2 is provided with reacting material outlet 3, reactor tubulation 4 is provided in reactor shell 1, instead
Answer the major diameter (caliber of reactor tubulation 4 and the pipe range of reactor tubulation 4) of device tubulation 4 than being 0.01 ~ 0.02, reactor tubulation
Than 0.015 ~ 0.04, the lower end of reactor shell 1 is provided with insulation jacket for 4 caliber and the diameter of reactor shell 1
Lower head 5, the external wall of upper portion of lower head 5 are provided with ammonia feed pipe 6, ammonia feed pipe 6 protrude into the center of inside of lower head 5 and
The export direction of ammonia feed pipe 6 is downward, and the lower sides of lower head 5 are provided with the opposite melting adipic acid/catalyst in position
Feed inlet 7 and diluent import 8, the bottom center of lower head 5 are provided with reacting material outlet 18.
In this particular embodiment, the top of reactor tubulation 4 is welded with thin tubesheet 9 on one, the upper surface of upper thin tubesheet 9
Loop has thick tube sheet 10 on one, and the bottom of reactor tubulation 4 is welded with thin tubesheet 11, the lower surface loop of lower thin tubesheet 11
There is thick tube sheet 12.Between upper thin tubesheet 9 and the inner wall of reactor shell 1 and lower thin tubesheet 11 and reactor shell 1
It is tightly connected respectively between inner wall, the upper end of reactor tubulation 4 is tightly connected with mounting hole corresponding on upper thin tubesheet 9, reaction
The lower end of device tubulation 4 is tightly connected with mounting hole corresponding on lower thin tubesheet 11.The top shell side of reactor tubulation 4 is provided with shell
Journey Heating medium 13, the lower part shell side of reactor tubulation 4 are provided with shell side heating agent outlet 14.The outer wall of reactor shell 1 may be used also
To be provided with expansion joint 15.
In this particular embodiment, the exit of ammonia feed pipe 6 is provided with the feed distributor 16 of seedpod of the lotus head, charging
Distributor 16 is located at the top of melting adipic acid/catalyst feeds 7.Pass through band heat preservation between lower head 5 and reactor shell 1
17 integrally connected of reverse frustoconic shell of collet.Upper cover 2 designs size and volume appropriate, it is ensured that when the stop of gas phase
Between and certain gas-liquid separation effect.
Main working process is as follows: the adipic acid of melting and phosphoric acid catalyst are melted oneself two by the bottom of lower head 5
Acid/catalyst feeds 7 are fed, and melting adipic acid/catalyst feeds 7 and lower head 5 are in tangential direction, keep material distribution equal
It is even.Diluent feed direction and adipic acid are symmetrical, reinforce turbulence, to reach better mixed effect, and by diluent into
Material mouth 8 can return the Matter Transfer after a part of reaction product initial gross separation in equipment, slow down the coking situation of equipment, simultaneously
Pre-reaction temperature can be reduced.
Ammonia from recovery ammonia workshop section and the air-flow returned through material return line, from the ammonia feed pipe 6 of lower head 5
It is sent to the vertical axis position of equipment, is directed downward.After the distribution of feed distributor 16, with the liquid phase entered in lower head 5
Raw material mass transfer makes reaction mass reach more uniform fluidized state.It is inverted round stage body shell body 17 above lower head 5, ammonia exists
While stirring liquid phase, under the guide functions of pyramidal structure, material is evenly into each vertical tubulation of reactor tubulation 4
It is interior, the dead angle of material deposition can be effectively reduced, while effect is formed with to side wall and is washed away, help to slow down material in equipment
Coking on inner wall.
Material carries out dehydration vaporization by being reacted when reactor tubulation 4, and ammonia is each reactor tubulation 4
It flows in a tubulation, is sufficiently mixed with material from the bottom to top.Due to increasing apparatus casing size and reducing tubulation caliber, make material
In the case where the same residence time, material-heat-exchanging area becomes larger, so that heat transfer rate is fast, heat exchange more evenly, while avoiding office
Portion's high temperature reduces the generation of by-product.Material is sent out through the reacting material outlet 3 at 2 top of upper cover, into follow-up equipment.
The shell side of reactor tubulation 4 uses heating medium for heating, guarantees to be heated evenly in tubulation, while lower head 5 and reverse frustoconic shell 17
Insulation jacket is installed, leads to steam inside collet, can be used for the pre-heating temperature elevation of material.
Above-described embodiment is the further explanation to the utility model, but the protection scope of the utility model is with claim
Subject to book.
Claims (7)
1. a kind of adiponitrile cyanation device, including reactor shell, it is characterised in that: the upper end of the reactor shell is set
It is equipped with upper cover, reacting material outlet is provided at the top of the upper cover, is provided with reaction in the reactor enclosure body
Device tubulation, the draw ratio of the reactor tubulation are 0.01 ~ 0.02, and the caliber of the reactor tubulation is reacted with described
For the diameter of device shell than 0.015 ~ 0.04, the lower end of the reactor shell is provided with the lower head with insulation jacket, institute
The external wall of upper portion for the lower head stated is provided with ammonia feed pipe, and the ammonia feed pipe protrudes into the inside of the lower head
The export direction of centre and the ammonia feed pipe is downward, and the lower sides of the lower head are provided with the opposite melting in position
Adipic acid/catalyst feeds and diluent import, the bottom center of the lower head are provided with reacting material outlet.
2. a kind of adiponitrile cyanation device according to claim 1, it is characterised in that: the top of the reactor tubulation
Portion is welded with thin tubesheet on one, and the upper surface loop of the upper thin tubesheet has thick tube sheet on one, the reactor tubulation
Bottom is welded with thin tubesheet, and the lower surface loop of the lower thin tubesheet has thick tube sheet.
3. a kind of adiponitrile cyanation device according to claim 2, it is characterised in that: the upper thin tubesheet with it is described
Reactor shell inner wall between and the lower thin tubesheet and the inner wall of the reactor shell between seal respectively
Connection, the upper end of the reactor tubulation are tightly connected with mounting hole corresponding on the upper thin tubesheet, the reaction
The lower end of device tubulation is tightly connected with mounting hole corresponding on the lower thin tubesheet.
4. a kind of adiponitrile cyanation device according to claim 3, it is characterised in that: the reactor tubulation it is upper
Portion's shell side is provided with shell side Heating medium, and the lower part shell side of the reactor tubulation is provided with the outlet of shell side heating agent.
5. a kind of adiponitrile cyanation device according to claim 1, it is characterised in that: outside the reactor shell
Wall is provided with expansion joint.
6. a kind of adiponitrile cyanation device according to claim 1, it is characterised in that: the ammonia feed pipe goes out
Be provided with the feed distributor of seedpod of the lotus head at mouthful, the feed distributor be located at the melting adipic acid/catalyst into
The top of material mouth.
7. a kind of adiponitrile cyanation device according to claim 1, it is characterised in that: the lower head and described
Pass through the reverse frustoconic shell integrally connected with insulation jacket between reactor shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821368394.6U CN208944112U (en) | 2018-08-24 | 2018-08-24 | A kind of adiponitrile cyanation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821368394.6U CN208944112U (en) | 2018-08-24 | 2018-08-24 | A kind of adiponitrile cyanation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208944112U true CN208944112U (en) | 2019-06-07 |
Family
ID=66735578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821368394.6U Active CN208944112U (en) | 2018-08-24 | 2018-08-24 | A kind of adiponitrile cyanation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208944112U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111056972A (en) * | 2019-12-16 | 2020-04-24 | 中国科学院大连化学物理研究所 | Application of alkyl quaternary phosphonium salt ionic liquid in synthesis of adiponitrile from adipic acid |
| CN114425280A (en) * | 2020-10-10 | 2022-05-03 | 中国石油化工股份有限公司 | Feeding distributor and reactor |
-
2018
- 2018-08-24 CN CN201821368394.6U patent/CN208944112U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111056972A (en) * | 2019-12-16 | 2020-04-24 | 中国科学院大连化学物理研究所 | Application of alkyl quaternary phosphonium salt ionic liquid in synthesis of adiponitrile from adipic acid |
| CN114425280A (en) * | 2020-10-10 | 2022-05-03 | 中国石油化工股份有限公司 | Feeding distributor and reactor |
| CN114425280B (en) * | 2020-10-10 | 2023-05-30 | 中国石油化工股份有限公司 | Feeding distributor and reactor |
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