CN203123600U - Toluene diamine cleaning and dehydrating device - Google Patents
Toluene diamine cleaning and dehydrating device Download PDFInfo
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- CN203123600U CN203123600U CN201320162381.4U CN201320162381U CN203123600U CN 203123600 U CN203123600 U CN 203123600U CN 201320162381 U CN201320162381 U CN 201320162381U CN 203123600 U CN203123600 U CN 203123600U
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- filler
- extraction mouth
- tower body
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- liquid
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- VOZKAJLKRJDJLL-UHFFFAOYSA-N 2,4-diaminotoluene Chemical compound CC1=CC=C(N)C=C1N VOZKAJLKRJDJLL-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 238000004140 cleaning Methods 0.000 title claims abstract description 7
- 239000000945 filler Substances 0.000 claims abstract description 71
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 239000012071 phase Substances 0.000 claims abstract description 14
- 239000007791 liquid phase Substances 0.000 claims abstract description 11
- 238000003825 pressing Methods 0.000 claims abstract description 11
- 238000000605 extraction Methods 0.000 claims description 65
- 230000018044 dehydration Effects 0.000 claims description 33
- 238000006297 dehydration reaction Methods 0.000 claims description 33
- -1 cresylic acid diamines Chemical class 0.000 claims description 20
- 230000004087 circulation Effects 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 14
- 241000282326 Felis catus Species 0.000 claims description 10
- 238000009826 distribution Methods 0.000 claims description 10
- 239000007792 gaseous phase Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 230000006837 decompression Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005070 sampling Methods 0.000 abstract 5
- 230000001351 cycling effect Effects 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 239000012535 impurity Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 238000010992 reflux Methods 0.000 description 7
- 238000012856 packing Methods 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 150000004992 toluidines Chemical class 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- DYSXLQBUUOPLBB-UHFFFAOYSA-N 2,3-dinitrotoluene Chemical compound CC1=CC=CC([N+]([O-])=O)=C1[N+]([O-])=O DYSXLQBUUOPLBB-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000004836 hexamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- UAEPNZWRGJTJPN-UHFFFAOYSA-N methylcyclohexane Chemical class CC1CCCCC1 UAEPNZWRGJTJPN-UHFFFAOYSA-N 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model belongs to the technical field of chemical-industry dehydrating equipment and relates to a toluene diamine cleaning and dehydrating device. A tower top condenser is formed at the top end of a dehydrating tower body and is fixedly connected with a tower top gas phase outlet in the upper part of the dehydrating tower body; a gas phase sampling outlet and a liquid phase sampling outlet are respectively and fixedly formed in the upper side and the lower side of the tower top condenser; the dehydrating tower body is internally provided with four segments of fillers; a support plate and a filler pressing ring are respectively and fixedly arranged at the bottom and the top of each segment of filler; the upper end of the filler pressing ring is provided with a liquid distributor, a depressurization pipe, a liquid collection tray and a liquid collection tank; a side line sampling outlet is formed in the upper part of the second segment of filler; a crude toluene diamine inlet is formed in the upper part of the fourth segment of filler; the lower part of the support plate of the fourth segment of filler is provided with a liquid collection device and a downflow pipe in sequence; and a reboiler inlet, a dividing plate, a product sampling outlet and a cycling sampling outlet are formed in the bottom of the dehydrating tower body. The toluene diamine cleaning and dehydrating device is simple in structure, reliable in principle, low in production cost, high in material utilization rate, high in mass-transfer efficiency, and environmentally-friendly.
Description
Technical field:
The utility model belongs to chemical industry dehydration equipment technical field, relates to a kind of equipment that removes water from the toluenediamine mixture, particularly a kind of toluenediamine cleaning dewater unit.
Background technology:
Toluenediamine (TDA) is the primary raw material of producing toluene di-isocyanate(TDI) (TDI), usually the production of TDA adopts hydrogenation of dinitro toluene to make, except containing purpose product TDA, also contain ortho position toluenediamine, water, high-boiling-point impurity tar and low boiling impurity toluidines and hexamethylene compounds in the reactant mixture; Water has very big influence to the process that the TDA phosgenation generates TDI, must remove in actual production totally, and water all will separate in dehydrating tower with low boiling impurity toluidines and methyl cyclohexane compounds simultaneously in the reactant mixture.Existing TDA dehydration equipment and technology are not all handled the low-boiling-point substance in the reactant mixture, a kind of TDA dehydrating tower is disclosed as Chinese patent (patent No. ZL200920017505.3), in its technical scheme since low-boiling-point substance and water in the lump from removed overhead, and it is not separated, can cause in the waste water organic impurity content too high like this, it is higher to show as COD value of waste water in the production, and follow-up wastewater treatment has been increased difficulty; TDA has only an extraction mouth at the bottom of the tower simultaneously, lack the differentiation of reboiler circulation extraction mouth and products export, because the reboiler outlet material will be violated the transmission of infiltrating capable matter heat with the material of upper level, reduce the efficient of heat and mass, cause in the product water content than high in the reboiler outlet material, increase the load of follow-up TDA rectification under vacuum system; So the toluenediamine dewater unit of seeking to design a kind of clean type is very with practical value.
Summary of the invention:
The purpose of this utility model is to overcome the shortcoming that prior art exists, seeking to design provides a kind of cleaning dewater unit that removes water from the toluenediamine mixture, improve the defective that existing toluenediamine (TDA) dewater unit exists, strengthen dehydrating effect, realize reducing the purpose of COD in the waste water.
To achieve these goals, agent structure of the present utility model comprises dehydration tower body, overhead condenser, cat head gaseous phase outlet, side line extraction mouth, crude cresylic acid diamines charging aperture, circulation extraction mouth, product extraction mouth, reboiler entrance, liquid collector, downspout, liquid distribution trough, filler, demarcation strip, gas phase extraction mouth, liquid phase extraction mouth, filler pressing, gripper shoe, demarcation strip opening, collecting tank, catch tray and flange; The top of dehydration tower body cylindraceous is shaped on the overhead condenser of the formula structure of hanging one's head, overhead condenser is fixedlyed connected with the cat head gaseous phase outlet on dehydration tower body top by flange, and overhead condenser upside and downside fixedly are shaped on gas phase extraction mouth and liquid phase extraction mouth respectively; Be spaced up and down in the inner chamber of dehydration tower body and be respectively arranged with four sections fillers, the bottom of every section filler isostructure respectively fixedly is shaped on the gripper shoe that supports filler, the top of every section filler fixedly is shaped on the fixedly filler pressing of filler respectively, the filler pressing upper end is shaped on liquid distribution trough, decompression tube, catch tray and collecting tank from bottom to top successively, and catch tray and collecting tank constitute liquid collector; Top-down first, second and third section filler adopts the efficient structured packing of corrugated board structures or screen net structure as the rectifying section filler respectively, and uppermost first section filler is used for cat head infinite reflux, the light component impurity in the enrichment waste water; Second and third section filler is divided into two sections with filler, improves the separative efficiency of filler, and water is effectively separated with toluenediamine; Parallel place with catch tray, top-down second section filler top is shaped on side line extraction mouth, the most of waste water of side line extraction mouth extraction, and residue waste water refluxes as phegma; Top-down the 4th section filler adopts anti-stifled grid packing as the stripping section filler, with the dehydration of crude cresylic acid diamines and concentrate; Parallel place with catch tray, top-down the 4th section filler top is shaped on crude cresylic acid diamines charging aperture, and the crude cresylic acid diamines enters in the dehydration tower body by crude cresylic acid diamines charging aperture; Bottom that be used for to support the gripper shoe of the 4th section filler is shaped on liquid collector and downspout successively, crude cresylic acid diamines (TDA) enter after the 4th section filler separates liquid through liquid collector collect the back by downspout inflow tower at the bottom of; Be shaped on the reboiler entrance at the bottom of the tower of dehydration tower body, demarcation strip, product extraction mouth and circulation extraction mouth, product extraction mouth and circulation extraction mouth fixedly are formed on the both sides of the demarcation strip of dehydration tower body bottom side end respectively, the demarcation strip bottom is shaped on square demarcation strip opening, the reboiler entrance fixedly is formed on the upper lateral part of close product extraction mouth on the bottom side of dehydration tower body 1, after toluenediamine at the bottom of the tower enters after heating and carries out gas-liquid separation in the dehydrating tower body, part water content low toluenediamine (TDA) enters product extraction mouth as extraction, and the circulation extraction mouth that another part enters the demarcation strip opposite side mixes with the liquid of backflow and then enters circulation from the reboiler entrance.
The utility model with reaction mixture crude cresylic acid diamines (TDA) through crude cresylic acid diamines charging aperture enter the dehydration tower body in, mix by downspout with liquid under top-down the 3rd section filler stream and to enter liquid distribution trough, the tower spirit carries out gas-liquid separation and exchange heat with thick TDA at top-down the 4th section filler, liquid is collected by downspout through the liquid collector of the 4th section filler below and is flowed into circulation extraction mouth, toluenediamine at the bottom of the tower (TDA) is entered in the dehydration tower body by the circulation of reboiler entrance after heating, toluenediamine (TDA) is in the dehydration tower body after the gas-liquid separation, liquid phase enters product extraction mouth, gas phase upwards enters each packing layer successively respectively, and the square demarcation strip opening of the demarcation strip bottom at the bottom of the tower is put the bottoms material only; Most of gas phase that overhead condenser comes up at the bottom of with tower is at overhead condensation, uncooled gas is discharged by gas phase extraction mouth, a small amount of organic impurities of enrichment is by the extraction of liquid phase extraction mouth, a large amount of condensate liquids flow into the first section filler in tower top by downspout and liquid distribution trough after the liquid collector of cat head is collected, a large amount of waste water are by the extraction of side line extraction mouth behind first section filler, part waste water as reflux stream to next section filler.
The utility model compared with prior art, it is simple in structure, principle is reliable, production cost is low, COD value of waste water is low, the subsequent wastewater treatment difficulty is little, the utilization of materials height, the mass-transfer efficiency height can effectively reduce the water content among the outlet material TDA, environmental friendliness.
Description of drawings:
Fig. 1 is agent structure principle schematic of the present utility model.
The partition plate structure principle schematic that Fig. 2 relates to for the utility model.
The specific embodiment:
Also the invention will be further described by reference to the accompanying drawings below by embodiment.
Embodiment:
The agent structure of present embodiment comprises dehydration tower body 1, overhead condenser 2, cat head gaseous phase outlet 3, side line extraction mouth 4, crude cresylic acid diamines charging aperture 5, circulation extraction mouth 6, product extraction mouth 7, reboiler entrance 8, liquid collector 9, downspout 10, liquid distribution trough 11, filler 12, demarcation strip 13, gas phase extraction mouth 14, liquid phase extraction mouth 15, filler pressing 16, gripper shoe 17, demarcation strip opening 18, collecting tank 19, catch tray 20 and flange 21; The top of dehydration tower body 1 cylindraceous is shaped on the overhead condenser 2 of the formula structure of hanging one's head, overhead condenser 2 is fixedlyed connected with the cat head gaseous phase outlet 3 on dehydration tower body 1 top by flange 21, and overhead condenser 2 upsides and downside fixedly are shaped on gas phase extraction mouth 14 and liquid phase extraction mouth 15 respectively; Be spaced up and down in the inner chamber of dehydration tower body 1 and be respectively arranged with four sections fillers 12, the bottom of every section filler 12 isostructure respectively fixedly is shaped on the gripper shoe 17 that supports filler, the top of every section filler 12 fixedly is shaped on the fixedly filler pressing 16 of filler respectively, filler pressing 16 upper ends are shaped on liquid distribution trough 11, decompression tube 10, catch tray 20 and collecting tank 19 from bottom to top successively, and catch tray 20 and collecting tank 19 constitute liquid collector 9; Top-down first, second and third section filler 12 adopts the efficient structured packing of corrugated board structures or screen net structure as the rectifying section filler respectively, and uppermost first section filler 12 is used for cat head infinite reflux, the light component impurity in the enrichment waste water; Second and third section filler 12 is divided into two sections with filler, improves the separative efficiency of filler, and water is effectively separated with toluenediamine; Top-down second section filler 12 top are shaped on side line extraction mouth 4 with catch tray 20 parallel places, the most of waste water of side line extraction mouth 4 extraction, and residue waste water refluxes as phegma; Top-down the 4th section filler 12 adopts anti-stifled grid packing as the stripping section filler, with the dehydration of crude cresylic acid diamines and concentrate; Top-down the 4th section filler top is shaped on crude cresylic acid diamines charging aperture 5 with catch tray 20 parallel places, and the crude cresylic acid diamines enters in the dehydration tower body 1 by crude cresylic acid diamines charging aperture 5; Bottom for the gripper shoe 17 that supports the 4th section filler 12 is shaped on liquid collector 9 and downspout 10 successively, and the liquid that crude cresylic acid diamines (TDA) enters after the 4th section filler separates passes through after liquid collector 10 is collected at the bottom of the downspout 9 inflow towers; Be shaped on reboiler entrance 8 at the bottom of the tower of dehydration tower body 1, demarcation strip 13, product extraction mouth 7 and circulation extraction mouth 6, product extraction mouth 7 and circulation extraction mouth 6 fixedly are formed on the both sides of the demarcation strip 13 of dehydration tower body 1 bottom side end respectively, demarcation strip 13 bottoms are shaped on square demarcation strip opening 18, reboiler entrance 8 fixedly is formed on the upper lateral part of close product extraction mouth 7 on the bottom side of dehydration tower body 1, after toluenediamine at the bottom of the tower enters after heating and carries out gas-liquid separation in the dehydrating tower body 1, part water content low toluenediamine (TDA) enters product extraction mouth 7 as extraction, and the circulation extraction mouth 6 that another part enters demarcation strip 13 opposite sides mixes with the liquid that refluxes and then enters circulation from reboiler entrance 8.
Present embodiment with reaction mixture crude cresylic acid diamines (TDA) through crude cresylic acid diamines charging aperture 5 enter the dehydration tower body 1 in, mix by downspout 10 with top-down the 3rd section liquid that filler 12 flows down and to enter liquid distribution trough 11, the tower spirit carries out gas-liquid separation and exchange heat with thick TDA at top-down the 4th section filler 12, liquid is collected by downspout 10 through the liquid collector 9 of the 4th section filler below and is flowed into circulation extraction mouth 6, toluenediamine at the bottom of the tower (TDA) is entered in the dehydration tower body 1 by 8 circulations of reboiler entrance after heating, toluenediamine (TDA) is in dehydration tower body 1 after the gas-liquid separation, liquid phase enters product extraction mouth 7, gas phase upwards enters each packing layer respectively successively, and the square demarcation strip opening 18 of demarcation strip 13 bottoms at the bottom of the tower is put the bottoms material only; Overhead condenser 2 with most of gas phase of coming up at the bottom of the tower at overhead condensation, uncooled gas is discharged by gas phase extraction mouth 14, a small amount of organic impurities of enrichment is by 15 extraction of liquid phase extraction mouth, a large amount of condensate liquids flow into the first section filler 12 in tower top by downspout 10 and liquid distribution trough 11 after the liquid collector 9 of cat head is collected, a large amount of waste water are by 4 extraction of side line extraction mouth behind first section filler 12, part waste water as reflux stream to next section filler.
Claims (1)
1. a toluenediamine cleaning dewater unit is characterized in that agent structure comprises dehydration tower body, overhead condenser, cat head gaseous phase outlet, side line extraction mouth, crude cresylic acid diamines charging aperture, circulation extraction mouth, product extraction mouth, reboiler entrance, liquid collector, downspout, liquid distribution trough, filler, demarcation strip, gas phase extraction mouth, liquid phase extraction mouth, filler pressing, gripper shoe, demarcation strip opening, collecting tank, catch tray and flange; The top of dehydration tower body cylindraceous is shaped on the overhead condenser of the formula structure of hanging one's head, overhead condenser is fixedlyed connected with the cat head gaseous phase outlet on dehydration tower body top by flange, and overhead condenser upside and downside fixedly are shaped on gas phase extraction mouth and liquid phase extraction mouth respectively; Be spaced up and down in the inner chamber of dehydration tower body and be respectively arranged with four sections fillers, the bottom of every section filler isostructure respectively fixedly is shaped on gripper shoe, the top of every section filler fixedly is shaped on filler pressing respectively, the filler pressing upper end is shaped on liquid distribution trough, decompression tube, catch tray and collecting tank from bottom to top successively, and catch tray and collecting tank constitute liquid collector; Parallel place with catch tray, top-down second section filler top is shaped on side line extraction mouth; Parallel place with catch tray, top-down the 4th section filler top is shaped on crude cresylic acid diamines charging aperture; The bottom of supporting the gripper shoe of the 4th section filler is shaped on liquid collector and downspout successively; Be shaped on reboiler entrance, demarcation strip, product extraction mouth and circulation extraction mouth at the bottom of the tower of dehydration tower body, product extraction mouth and circulation extraction mouth fixedly are formed on the both sides of the demarcation strip of dehydration tower body bottom side end respectively, the demarcation strip bottom is shaped on square demarcation strip opening, and the reboiler entrance fixedly is formed on the upper lateral part of close product extraction mouth on the bottom side of dehydration tower body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320162381.4U CN203123600U (en) | 2013-04-03 | 2013-04-03 | Toluene diamine cleaning and dehydrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320162381.4U CN203123600U (en) | 2013-04-03 | 2013-04-03 | Toluene diamine cleaning and dehydrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203123600U true CN203123600U (en) | 2013-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320162381.4U Expired - Fee Related CN203123600U (en) | 2013-04-03 | 2013-04-03 | Toluene diamine cleaning and dehydrating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203123600U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105439872A (en) * | 2015-12-28 | 2016-03-30 | 甘肃银光聚银化工有限公司 | Method for removing moisture in toluenediamine (TDA) |
| CN107096250A (en) * | 2017-04-28 | 2017-08-29 | 东营黄蓝知识产权运营管理有限公司 | High-purity chemical products purification system |
| CN105999753B (en) * | 2016-06-30 | 2018-06-08 | 江苏永大化工机械有限公司 | Steam solidifying integral type purifying ethylene glycol tower |
| CN110452125A (en) * | 2019-09-03 | 2019-11-15 | 天津科技大学 | A kind of toluenediamine dewatering and device based on mechanical steam recompression MVR |
-
2013
- 2013-04-03 CN CN201320162381.4U patent/CN203123600U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105439872A (en) * | 2015-12-28 | 2016-03-30 | 甘肃银光聚银化工有限公司 | Method for removing moisture in toluenediamine (TDA) |
| CN105999753B (en) * | 2016-06-30 | 2018-06-08 | 江苏永大化工机械有限公司 | Steam solidifying integral type purifying ethylene glycol tower |
| CN107096250A (en) * | 2017-04-28 | 2017-08-29 | 东营黄蓝知识产权运营管理有限公司 | High-purity chemical products purification system |
| CN110452125A (en) * | 2019-09-03 | 2019-11-15 | 天津科技大学 | A kind of toluenediamine dewatering and device based on mechanical steam recompression MVR |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20130814 Termination date: 20210403 |