CN206927831U - A kind of toluene di-isocyanate(TDI) retracting device - Google Patents
A kind of toluene di-isocyanate(TDI) retracting device Download PDFInfo
- Publication number
- CN206927831U CN206927831U CN201720449355.8U CN201720449355U CN206927831U CN 206927831 U CN206927831 U CN 206927831U CN 201720449355 U CN201720449355 U CN 201720449355U CN 206927831 U CN206927831 U CN 206927831U
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- China
- Prior art keywords
- pipeline
- valve
- opening
- pipe
- tdi
- 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.)
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- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 239000012948 isocyanate Substances 0.000 title claims abstract description 24
- 230000004087 circulation Effects 0.000 claims abstract description 44
- 238000001704 evaporation Methods 0.000 claims abstract description 20
- 230000008020 evaporation Effects 0.000 claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 16
- 238000005235 decoking Methods 0.000 claims description 16
- 230000008676 import Effects 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000011269 tar Substances 0.000 description 13
- 239000000463 material Substances 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- 238000001291 vacuum drying Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 238000004821 distillation Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000011285 coke tar Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 235000021050 feed intake Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000011273 tar residue Substances 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 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 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
It the utility model is related to a kind of toluene di-isocyanate(TDI) retracting device, including evaporation drying machine, flash valve, recycle feed house steward and circulation discharge header pipe, the recycle feed house steward is connected with shunt conduit, shunt conduit output end is provided with the first pipeline and second pipe, the first valve and the second valve, second pipe connection circulation discharge header pipe are respectively equipped with first pipeline and second pipe；The flash valve includes the first opening, the second opening and the 3rd opening, the opening of the first pipeline connection first, and the second opening is connected with the 3rd pipeline, and the 3rd pipeline is provided with the 3rd valve, the 3rd pipeline connection circulation discharge header pipe；3rd opening of the flash valve is connected with evaporation drying machine input.The utility model is simple in construction, easy to make, greatly reduces equipment blocking, it even if finding that slight blocking occurs for flash valve during operation, can also be backwashed with Backwash pipeline, reduce flash valve and block, and easily determine that flash valve blocks or other elements block, convenient maintenance.
Description
Technical field
It the utility model is related to production of toluene diisocyanate field, more particularly to a kind of toluene di-isocyanate(TDI) recovery dress
Put.
Background technology
Toluene di-isocyanate(TDI) is water white transparency to weak yellow liquid, irritant smell；Light color is met to deepen.Do not dissolve in
Water, it is dissolved in acetone, ethyl acetate and toluene etc..Easily with including the compound of reactive hydrogen atom:Amine, water, alcohol, acid, alkali hair
Raw reaction, unmanageable reaction particularly occurs with sodium hydroxide and tertiary amine, and release big calorimetric.Toluene di-isocyanate(TDI) can be with
Water reacts, and should keep away from moisture.Toluene di-isocyanate(TDI) can react with strong oxidizer.Toluene di-isocyanate(TDI) heat, naked light,
Spark can catch fire.Toluene di-isocyanate(TDI) heat resolve releases cyanide and nitrogen oxides.
The technique that toluene di-isocyanate(TDI) is reclaimed in research and development both at home and abroad from distillation tar mainly has pressure distillation, extraction
Distillation, thin film evaporation, continuous vacuum drying technology etc., the toluene di-isocyanate(TDI) of industrialization recovery at present use continuous vacuum drying
Technology is the most extensive.Continuous vacuum drying technology is to be passed through the tar toluene di-isocyanate(TDI) mixed liquor in decoking cycles system
Evaporation drying machine, under high temperature condition of high vacuum degree stir evaporation and isolate toluene di-isocyanate(TDI), and tar residue is dried as can
Flow particles.Its separating high-viscosity material suitable for Chemical Manufacture of continuous vacuum drying technology, monopoly technically make
Obtaining it turns into a set of very special separator of chemical field.Tar toluene di-isocyanate(TDI) mixed liquor is high-viscosity material, is made
Obtain evaporation drying machine feed cycle pipe etc. to block, in actual production process, built again after feed pipe repair and maintenance
During vertical Matter Transfer, easily blocked because the cold defective material of pipeline deposition again results in equipment.Because of operational characteristic so that opening and inspecting a pipeline,
Time-consuming 10 hours (250 DEG C of temperature setting when evaporation drying machine fuselage is run at least is needed from the parking of evaporation drying machine to resuming production
Left and right, and open and inspect equipment then totally must will be reduced to 100 after charging stops by 250 DEG C again etc. TDI evaporations in evaporation drying machine
It can just be opened and inspect below DEG C, temperature is risen to 250 DEG C again after having opened and inspect, wherein being evaporated, cooling, opening and inspecting, a series of take of heating up
Similar 10 hours, wasted time and energy in quantity-produced chemical process), for this, reduction equipment blocks particularly important, judges to set
It is standby whether really occur blocking it is also extremely important.
Utility model content
In order to solve the above problems, the purpose of this utility model is to provide a kind of toluene di-isocyanate(TDI) retracting device.
To achieve the above object, the utility model uses following technical scheme：A kind of toluene di-isocyanate(TDI) retracting device,
Isocon is connected with including evaporation drying machine, flash valve, recycle feed house steward and circulation discharge header pipe, the recycle feed house steward
Road, shunt conduit output end are provided with the first pipeline and second pipe, the first valve are respectively equipped with the first pipeline and second pipe
With the second valve, second pipe connection circulation discharge header pipe；The flash valve includes the first opening, the second opening and the 3rd is opened
Mouthful, the opening of the first pipeline connection first, the second opening is connected with the 3rd pipeline, and the 3rd pipeline is provided with the 3rd valve, the 3rd pipe
Road connection circulation discharge header pipe；3rd opening of the flash valve is connected with evaporation drying machine input.
Wherein, second open split is connected with Backwash pipeline, and Backwash pipeline is provided with the 4th valve.
Wherein, the recycle feed house steward is provided with filter.
Wherein, total valve is additionally provided with the recycle feed house steward, total valve is arranged between filter and shunt conduit.
Wherein, in addition to decoking tower, circulating pump and heater, the decoking tower are provided with charging aperture, discharging opening, loop exit
With circulation import, loop exit pipeline connection circulating pump, heater and circulation import successively；Between heater and circulation import
Pipeline opens up bypass line and is connected with recycle feed house steward；Pipeline between loop exit and circulating pump opens up bypass line with following
Ring discharge header pipe connects.
Wherein, the pipe diameter of the recycle feed house steward is more than the pipe diameter of the first pipeline and second pipe.
Wherein, the recycle feed house steward is provided with first flowmeter and pressure gauge, first flowmeter be located at filter with
Between total valve, pressure gauge is between total valve and shunt conduit；Circulation discharge header pipe is provided with second flowmeter.
The utility model has the advantages that：1. recycle feed house steward and circulation discharge header pipe are followed with big flow
Ring, greatly reduce the elements such as recycle feed house steward upper valve, flowmeter and block；2. recycle feed house steward feeds intake, pass through second
Pipeline avoids remaining cold burden or impurity in house steward from blocking the equipment such as flash valve in advance after displacement, then the flash valve that comes into operation；3. operation
When slight block occurs for Shi Faxian flash valves, backwashed with Backwash pipeline, reduce flash valve and block；4. in recycle feed
When house steward blocks, it can be used for judging that flash valve blocks or other elements block by second pipe, avoid erroneous judgement from flashing
Valve blocks and causes to open and inspect the loss that flash valve is brought；5. when opening and inspecting flash valve, by second pipe recycle feed can be kept total
The continuous circulation of pipe, after avoiding circulation pipe cooling down, tar deposition blocks duct element；6. the utility model is simple in construction, system
Facilitate, cost of investment is low.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present utility model；
Fig. 2 is the utility model part A schematic diagram；
Fig. 3 is the utility model flash valve structural representation；
Description of reference numerals：1. evaporation drying machine, 2. flash valves, 3. recycle feed house stewards, 4. shunt conduits, 5. recycle
Expect house steward, 6. Backwash pipelines, 7. decoking towers, 8. circulating pumps, 9. heaters, 21. first openings, 22. second openings, 23. the
Three openings, 31. filters, 32. total valves, 33. first flowmeters, 34. pressure gauges, 41. first pipelines, 42. second pipes,
43. the 3rd pipeline, 51. second flowmeters, 64. the 4th valves, 71. charging apertures, 72. discharging openings, 73. loop exits, 74. circulations
Import, 411. first valves, 422. second valves, 433. the 3rd valves.
Embodiment
The utility model is described in further details below in conjunction with the drawings and specific embodiments：
As Figure 1-3, a kind of toluene di-isocyanate(TDI) retracting device, including evaporation drying machine 1, flash valve 2, circulate into
Expect house steward 3 and circulation discharge header pipe 5, the recycle feed house steward 3 is connected with shunt conduit 4, and the output end of shunt conduit 4 is provided with the
One pipeline 41 and second pipe 42, the first valve 411 and the second valve are respectively equipped with the first pipeline 41 and second pipe 42
422, the connection circulation discharge header pipe 5 of second pipe 42；The flash valve 2 includes first the 21, second opening 22 and the 3rd of opening and opened
Mouth 23, the opening 21 of the first pipeline 41 connection first, the second opening 22 are connected with the 3rd pipeline 43, and the 3rd pipeline 43 is provided with the 3rd
Valve 433, the 3rd pipeline 43 connection circulation discharge header pipe 5；3rd opening 23 of the flash valve 2 and the (evaporation of evaporation drying machine 1
TDI blended tarses are separated, obtain the thick TDI of gas phase, solid phase coke tar particles carry out respective handling as defective material) input connection,
The inside of flash valve 2 is deep " U " passage, and material flows into U-typed passage rear portion in the first opening 21 and entered from the 3rd opening 23
Evaporation drying machine 1, another part enter the 3rd pipeline 43 from the second opening 22 and carry out Matter Transfer.The shunting of second opening 22
Backwash pipeline 6 is connected with, Backwash pipeline 6 is provided with the 4th valve 64.The recycle feed house steward 3 is provided with filter 31
(filtering rack, filter 31 is without filtering fine-structure mesh, only rack because fine-structure mesh be present is difficult circulation high-viscosity material, rack in order to
Filter larger impurity).Total valve 32 is additionally provided with the recycle feed house steward 3, total valve 32 is arranged on filter 31 and shunting
Between pipeline 4.The pipe diameter of the recycle feed house steward 3 is more than the pipe diameter of the first pipeline 41 and second pipe 42.Institute
State recycle feed house steward 3 and be provided with first flowmeter 33 and pressure gauge 34, first flowmeter 33 is located at filter 31 and total valve
Between 32, pressure gauge 34 is between total valve 32 and shunt conduit 4；Circulation discharge header pipe 5 is provided with second flowmeter 51.Follow
It is that the element diameter such as DN50, the upper each valve of house steward, flowmeter is DN50 that ring, which feeds house steward 3 and the circulation caliber of discharge header pipe 5, the
One pipeline 41 and the caliber of second pipe 42 are DN25.In embodiment, 1-3bar of feed pressure, feeding temperature be 140-
160 DEG C, the circular flow of feed cycle house steward 3 is 10000-24000kg/h.
Preferably, as shown in figure 1, also including decoking tower 7, circulating pump 8 and heater 9, the flash separation tar of decoking tower 7 and
TDI, circulating pump 8, which provides power, is circulated tar TDI, and the decoking tower 7 is provided with charging aperture 71, discharging opening 72, recycled
Mouth 73 and circulation import 74, pipeline connection circulating pump 8, heater 9 and the circulation import 74 successively of loop exit 73；The He of heater 9
Pipeline between circulation import 74 opens up bypass line and is connected with recycle feed house steward 3；Between loop exit 73 and circulating pump 8
Pipeline opens up bypass line and is connected with circulation discharge header pipe 5.Material is all the time by following in decoking tower 7, circulating pump 8 and heater 9
Circulation is played in ring outlet 73, circulating pump 8, heater 9 and circulation import 74.Pipeline between decoking tower 7, circulating pump 8 and heater 9
Caliber is more than recycle feed house steward 3 and the circulation caliber of discharge header pipe 5.
Operation principle：In use, TDI and blended tars enter decoking tower 7, the flash separation of decoking tower 7 from charging aperture 71
Tar and TDI, the crude toluene diisocynate that initial gross separation goes out are discharged from discharging opening 72, unsegregated TDI and tar mixing
Thing enters pipeline from loop exit 73, and circulation is played all the time by loop exit 73, circulating pump 8, heater 9 and circulation import 74；
It is total that the bypass line that part TDI and the blended tars pipeline between heater 9 and circulation import 74 open up enters recycle feed
Pipe 3.
When starting to feed intake, close the first valve 411 and the 3rd valve 433, open the second valve 422, total valve 32 and
Each valve on whole main pipe line so that establish tar TDI circulations from second pipe 42, guaranteeing without flash valve 2 will be cold
Impurity displace circulation house steward (because during parking in pipeline may stationary point defective material, when from newly come into operation this pipeline when, manage at the beginning
Road is colder, and TDI tar mixed liquor one is easier to occur necessarily condensing to the cold, easily blocks and dodges pipeline and equipment), the material after displacement leads to
Cross the circulating line that circulation discharge header pipe 5 enters between decoking tower 7, circulating pump 8 and heater 9.After replacing 3-30min, by the
One valve 411 and the 3rd valve 433 are also opened, and such tar TDI mixed liquors are formed compared with stable circulation, are then flashed by controlling
2 three openings of valve are fed to evaporation drying machine 1, are reduced pipeline wall built-up and are blocked.Now the circular flow of feed cycle house steward 3 is
10000-24000kg/h, the material of recycle feed house steward 3 are divided into two strands, and one material is about passed through with 4000-8000kg/h amounts
Flash valve 2, another stock about continue through second pipe 42 with 6000-16000kg/h.
When finding that certain blocking (as long as find begin with clogging occur) occurs in flash valve 2, backwashed immediately.
Rinsing step：Close total valve 32 and temporarily cease charging, closing the 3rd valve 433, (the first valve 411 and the second valve 422 are
Open mode), then open the 4th valve 64 (initial gross separation of decoking tower 7 goes out slightly in TDI production-process systems by being passed through thick TDI
TDI) carry out backwashing flash valve 2, the second opening 22 and first of the flow direction of material from the 4th valve 64 inversely Jing Guo flash valve 2 is opened
Mouth 21, then to the first pipeline of valve 41, second pipe 42 and circulation discharge header pipe 5, be finally back to decoking tower 7, circulating pump 8 and add
In circulating line between hot device 9.
Specific embodiment of the present utility model is the foregoing is only, not thereby limits patent model of the present utility model
Enclose, every equivalent structure made using the utility model specification and accompanying drawing content is replaced, or is directly or indirectly used in it
The technical field of his correlation, is similarly included in scope of patent protection of the present utility model.
Claims (7)
- A kind of 1. toluene di-isocyanate(TDI) retracting device, it is characterised in that：Including evaporation drying machine (1), flash valve (2), circulation House steward (3) and circulation discharge header pipe (5) are fed, the recycle feed house steward (3) is connected with shunt conduit (4), shunt conduit (4) Output end is provided with the first pipeline (41) and second pipe (42), and first is respectively equipped with the first pipeline (41) and second pipe (42) Valve (411) and the second valve (422), second pipe (42) connection circulation discharge header pipe (5)；The flash valve (2) includes the One opening (21), the second opening (22) and the 3rd opening (23), the opening (21) of the first pipeline (41) connection first, the second opening (22) the 3rd pipeline (43) is connected with, the 3rd pipeline (43) is provided with the 3rd valve (433), and the connection of the 3rd pipeline (43) recycles Expect house steward (5)；3rd opening (23) of the flash valve (2) is connected with evaporation drying machine (1) input.
- 2. toluene di-isocyanate(TDI) retracting device according to claim 1, it is characterised in that：Second opening (22) point Stream is connected with Backwash pipeline (6), and Backwash pipeline (6) is provided with the 4th valve (64).
- 3. toluene di-isocyanate(TDI) retracting device according to claim 2, it is characterised in that：The recycle feed house steward (3) it is provided with filter (31).
- 4. toluene di-isocyanate(TDI) retracting device according to claim 3, it is characterised in that：The recycle feed house steward (3) total valve (32) is additionally provided with, total valve (32) is arranged between filter (31) and shunt conduit (4).
- 5. toluene di-isocyanate(TDI) retracting device according to claim 4, it is characterised in that：Also include decoking tower (7), follow Ring pump (8) and heater (9), the decoking tower (7) are provided with charging aperture (71), discharging opening (72), loop exit (73) and circulation Import (74), loop exit (73) pipeline connection circulating pump (8), heater (9) and circulation import (74) successively；Heater (9) Pipeline between circulation import (74) opens up bypass line and is connected with recycle feed house steward (3)；Loop exit (73) and circulation Pipeline between pump (8) opens up bypass line and is connected with circulation discharge header pipe (5).
- 6. according to the toluene di-isocyanate(TDI) retracting device described in claim any one of 1-5, it is characterised in that：It is described circulate into Expect that the pipe diameter of house steward (3) is more than the pipe diameter of the first pipeline (41) and second pipe (42).
- 7. toluene di-isocyanate(TDI) retracting device according to claim 6, it is characterised in that：The recycle feed house steward (3) first flowmeter (33) and pressure gauge (34) are provided with, first flowmeter (33) is located at filter (31) and total valve (32) Between, pressure gauge (34) is located between total valve (32) and shunt conduit (4)；Circulation discharge header pipe (5) is provided with second flow Count (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720449355.8U CN206927831U (en) | 2017-04-26 | 2017-04-26 | A kind of toluene di-isocyanate(TDI) retracting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720449355.8U CN206927831U (en) | 2017-04-26 | 2017-04-26 | A kind of toluene di-isocyanate(TDI) retracting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206927831U true CN206927831U (en) | 2018-01-26 |
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ID=61350841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720449355.8U Expired - Fee Related CN206927831U (en) | 2017-04-26 | 2017-04-26 | A kind of toluene di-isocyanate(TDI) retracting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206927831U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108731382A (en) * | 2018-06-20 | 2018-11-02 | 福建省东南电化股份有限公司 | A kind of phosgene recovery system for cancelling compressor set |
-
2017
- 2017-04-26 CN CN201720449355.8U patent/CN206927831U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108731382A (en) * | 2018-06-20 | 2018-11-02 | 福建省东南电化股份有限公司 | A kind of phosgene recovery system for cancelling compressor set |
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| 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: 20180126 |