CN208414292U - A kind of production of toluene diisocyanate methylbenzene nitration process heat utilization device - Google Patents
A kind of production of toluene diisocyanate methylbenzene nitration process heat utilization device Download PDFInfo
- Publication number
- CN208414292U CN208414292U CN201820198122.XU CN201820198122U CN208414292U CN 208414292 U CN208414292 U CN 208414292U CN 201820198122 U CN201820198122 U CN 201820198122U CN 208414292 U CN208414292 U CN 208414292U
- Authority
- CN
- China
- Prior art keywords
- outlet
- heat exchanger
- bend pipe
- phase outlet
- pneumatic control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000006396 nitration reaction Methods 0.000 title claims abstract description 10
- SLFASZAYVJVNBZ-UHFFFAOYSA-N 2,4-diisocyanato-1-methylbenzene;toluene Chemical compound CC1=CC=CC=C1.CC1=CC=C(N=C=O)C=C1N=C=O SLFASZAYVJVNBZ-UHFFFAOYSA-N 0.000 title claims abstract description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 20
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 20
- 239000004571 lime Substances 0.000 claims abstract description 20
- 239000007791 liquid phase Substances 0.000 claims abstract description 14
- 239000007792 gaseous phase Substances 0.000 claims abstract description 9
- 238000005406 washing Methods 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 3
- 238000010025 steaming Methods 0.000 claims description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 7
- DYSXLQBUUOPLBB-UHFFFAOYSA-N 2,3-dinitrotoluene Chemical compound CC1=CC=CC([N+]([O-])=O)=C1[N+]([O-])=O DYSXLQBUUOPLBB-UHFFFAOYSA-N 0.000 description 6
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000007701 flash-distillation Methods 0.000 description 2
- ZXVONLUNISGICL-UHFFFAOYSA-N 4,6-dinitro-o-cresol Chemical group CC1=CC([N+]([O-])=O)=CC([N+]([O-])=O)=C1O ZXVONLUNISGICL-UHFFFAOYSA-N 0.000 description 1
- 241000208340 Araliaceae Species 0.000 description 1
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- XLJMAIOERFSOGZ-UHFFFAOYSA-M cyanate Chemical compound [O-]C#N XLJMAIOERFSOGZ-UHFFFAOYSA-M 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model discloses a kind of production of toluene diisocyanate methylbenzene nitration process heat utilization devices, including high pressure lime set flash tank, heat exchanger and tail portion tank；The upper middle lower part of high pressure lime set flash tank is respectively equipped with gaseous phase outlet, feeding inlet and liquid-phase outlet；Heat exchanger includes interior baffling heat exchanger tube, and the first bend pipe is communicated between interior baffling heat exchange tube inlet end and liquid-phase outlet；The second bend pipe is communicated between in the middle part of interior baffling heat transfer tube outlet end and tail portion tank；The upper and lower part of tail portion tank is respectively equipped with offgas outlet and tail washings outlet, and offgas outlet pipeline is connected with cooler；Gaseous phase outlet pipeline is connected with the first pneumatic control valve；The second pneumatic control valve is equipped between liquid-phase outlet and the first bend pipe；Third pneumatic control valve is equipped between first bend pipe and interior baffling heat exchange tube inlet end；Utility model has the advantages that energy conservation, avoid " steam hammer " phenomenon generate, promoted security performance.
Description
Technical field
The utility model relates to technical field of chemical production equipment, specially a kind of production of toluene diisocyanate toluene nitre
Chemical industry sequence heat utilization device.
Background technique
During production of toluene diisocyanate, methylbenzene nitration process therein is needed due to the characteristic of dinitrotoluene (DNT)
Its pipe-line equipment heat tracing is given using 80-90 DEG C of hot water.Thus need independent hot water cyclesystem.And hot water circuit system
System is to be heated up using low-pressure steam to its circulation mostly, to reach heat tracing temperature requirement.So the production technology of dinitrotoluene (DNT)
In the middle, the consumption of low-pressure steam is needed.And it is directed to heat tracing temperature requirement, it will use in production of toluene diisocyanate process
To high, middle pressure steam.High, middle pressure steam lime set can be generated after heat exchange, temperature and pressure is equally able to satisfy dinitro first
The heating requirement of hot-water heating system in benzene production.It, can be low by former temperature raising medium as long as being transformed to heating system pipe-line equipment
Pressure steam replaces, so that the dinitrotoluene (DNT) production phase reaches the mesh of the consumption of steam zero during production of toluene diisocyanate
Mark, in this way to very helpful in terms of energy conservation.
Utility model content
The purpose of this utility model is to provide a kind of use for reducing external low-pressure steam, the toluene two of energy-saving safe is different
Cyanate produces methylbenzene nitration process heat utilization device.
To achieve the above object, the technical solution adopted in the utility model is as follows:
A kind of production of toluene diisocyanate methylbenzene nitration process heat utilization device, including high pressure lime set flash tank, heat exchange
Device and tail portion tank；The upper middle lower part of high pressure lime set flash tank is respectively equipped with gaseous phase outlet, feeding inlet and liquid-phase outlet；Heat exchanger packet
Interior baffling heat exchanger tube is included, the first bend pipe is communicated between interior baffling heat exchange tube inlet end and liquid-phase outlet；Interior baffling heat exchanger tube goes out
The second bend pipe is communicated between in the middle part of mouth end and tail portion tank；The upper and lower part of tail portion tank is respectively equipped with offgas outlet and tail washings goes out
Mouthful, offgas outlet pipeline is connected with cooler.
Wherein, gaseous phase outlet pipeline is connected with the first pneumatic control valve；Second is equipped between liquid-phase outlet and the first bend pipe
Pneumatic control valve.
Wherein, third pneumatic control valve is equipped between the first bend pipe and interior baffling heat exchange tube inlet end.
For the prior art, utility model has the advantages that 1. realizing to production of toluene diisocyanate process
The thermal energy that the height of middle generation, middle pressure steam lime set carry makes full use of, and reduces production cost；2. the design of bend pipe can prevent gas-liquid
Entrainment generates " steam hammer " phenomenon；3. the first pneumatic control valve and the second pneumatic control valve can maintain the pressure in high pressure lime set flash tank
Power liquid level is steady；4. third pneumatic control valve maintains flow to realize that heat exchanger heating temperature is steady.
Detailed description of the invention
Fig. 1 is the utility model pipeline jointing construction schematic diagram；
Label declaration: 1 high pressure lime set flash tank, 11 gaseous phase outlets, 12 feeding inlets, 13 liquid-phase outlets, 2 heat exchangers, in 21
Baffling heat exchanger tube, 3 tail portion tanks, 31 offgas outlets, the outlet of 32 tail washings, 4 first bend pipes, 5 second bend pipes, 6 coolers, 7 first gas
Dynamic regulating valve, 8 second pneumatic control valves, 9 third pneumatic control valves.
Specific embodiment
It is described in detail below in conjunction with content of the specification drawings and specific embodiments to the utility model.
As shown in Figure 1, a kind of production of toluene diisocyanate methylbenzene nitration process heat utilization device, including high pressure lime set are dodged
Steaming pot 1, heat exchanger 2 and tail portion tank 3；The upper middle lower part of high pressure lime set flash tank 1 is respectively equipped with gaseous phase outlet 11,12 and of feeding inlet
Liquid-phase outlet 13, high pressure lime set enter high pressure lime set flash tank 1 from feeding inlet 12, by the low-pressure steam that generates after flash distillation from top
Portion's extraction is used for production system, and the lime set of generation is discharged by liquid-phase outlet 13；Heat exchanger 2 includes interior baffling heat exchanger tube 21,
The first bend pipe 4 (U-typed pipe), the lime set generated after flash distillation are communicated between interior 21 arrival end of baffling heat exchanger tube and liquid-phase outlet 13
Enter interior baffling heat exchanger tube 21 by the first bend pipe 4, realizes to high, the middle pressure generated during production of toluene diisocyanate
The thermal energy that steam condensate carries makes full use of, and the first bend pipe 4 can prevent entrained liquid from generating " steam hammer " phenomenon；Interior baffling heat exchanger tube
21 outlet ends and tail portion tank are communicated with the second bend pipe 5 between 3 middle part, and the lime set after heat exchange enters tail portion tank by the second bend pipe 5
3, on the one hand the second bend pipe 5 can avoid the generation of " steam hammer " phenomenon, on the other hand may insure that interior baffling heat exchanger tube 21 is kept to fill
Full lime set realizes that heat distributes uniformly；The upper and lower part of tail portion tank 3 is respectively equipped with offgas outlet 31 and tail washings outlet 32, tail
Gas exports 31 pipelines and is connected with cooler 6, and the exhaust temperature that cooler 6 can avoid discharge is excessively high, promotes security performance.
In the present embodiment, 11 pipeline of gaseous phase outlet is connected with the first pneumatic control valve 7；Liquid-phase outlet 13 and the first bend pipe 4
Between be equipped with the second pneumatic control valve 8, the first pneumatic control valve 7 and the second pneumatic control valve 8 can maintain high pressure lime set flash tank
Interior pressure liquid level is steady.
In the present embodiment, third pneumatic control valve 9 is equipped between the first bend pipe 4 and interior 21 arrival end of baffling heat exchanger tube, the
Three pneumatic control valves 9 maintain the flow of the lime set entered in interior baffling heat exchanger tube 21, maintain the steady of temperature.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, although ginseng
The utility model is described in detail according to previous embodiment, it for those skilled in the art, still can be with
It modifies the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features, it is all
Within the spirit and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in practical
Within novel protection scope.
Claims (3)
1. a kind of production of toluene diisocyanate methylbenzene nitration process heat utilization device, it is characterised in that: dodged including high pressure lime set
Steaming pot (1), heat exchanger (2) and tail portion tank (3)；The upper middle lower part of high pressure lime set flash tank (1) be respectively equipped with gaseous phase outlet (11),
Feeding inlet (12) and liquid-phase outlet (13)；Heat exchanger (2) includes interior baffling heat exchanger tube (21), interior baffling heat exchanger tube (21) arrival end
The first bend pipe (4) are communicated between liquid-phase outlet (13)；Between in the middle part of interior baffling heat exchanger tube (21) outlet end and tail portion tank (3)
It is communicated with the second bend pipe (5)；The upper and lower part of tail portion tank (3) is respectively equipped with offgas outlet (31) and tail washings outlet (32), tail
Gas outlet (31) pipeline is connected with cooler (6).
2. a kind of production of toluene diisocyanate methylbenzene nitration process heat utilization device according to claim 1, feature
Be: gaseous phase outlet (11) pipeline is connected with the first pneumatic control valve (7)；It is set between liquid-phase outlet (13) and the first bend pipe (4)
There are the second pneumatic control valve (8).
3. a kind of production of toluene diisocyanate methylbenzene nitration process heat utilization device according to claim 2, feature
It is: is equipped with third pneumatic control valve (9) between the first bend pipe (4) and interior baffling heat exchanger tube (21) arrival end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820198122.XU CN208414292U (en) | 2018-02-05 | 2018-02-05 | A kind of production of toluene diisocyanate methylbenzene nitration process heat utilization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820198122.XU CN208414292U (en) | 2018-02-05 | 2018-02-05 | A kind of production of toluene diisocyanate methylbenzene nitration process heat utilization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208414292U true CN208414292U (en) | 2019-01-22 |
Family
ID=65120506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820198122.XU Expired - Fee Related CN208414292U (en) | 2018-02-05 | 2018-02-05 | A kind of production of toluene diisocyanate methylbenzene nitration process heat utilization device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208414292U (en) |
-
2018
- 2018-02-05 CN CN201820198122.XU patent/CN208414292U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190122 |