CN205965801U - A tower reactor for dimethyl urea building -up reactions - Google Patents
A tower reactor for dimethyl urea building -up reactions Download PDFInfo
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- CN205965801U CN205965801U CN201620561524.2U CN201620561524U CN205965801U CN 205965801 U CN205965801 U CN 205965801U CN 201620561524 U CN201620561524 U CN 201620561524U CN 205965801 U CN205965801 U CN 205965801U
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Abstract
The utility model provides a tower reactor for dimethyl urea building -up reactions, top -down divide into tower segment and lower tower segment two parts: it includes liquid distributor a, regular packing a, riser and collection liquid case to go up tower segment top -down, go up tower segment's top of the tower and seted up the vacuum extraction opening, regular packing a's top is equipped with upper column circulation fluid entry, and feed pipeline passes through upper column circulation fluid entry with the liquid distributor an intercommunication, tower segment top -down includes liquid distributor b and regular packing b down, regular packing b's top is equipped with lower column circulation fluid entry, regular packing b's below is equipped with monomethyl amine gas feed and upper column circulation fluid income lower column mouth, tower segment's tower cauldron still is equipped with lower column outlet of circulation hydraulic down, lower column outlet of circulation hydraulic and ejection of compact pipeline intercommunication. The utility model discloses overcome the not enough of prior art, provide the tower reactor of a maximum increase feed gas, the double -phase mass transfer of liquid, the synthetic dimethyl urea of heat transfer area.
Description
Technical field
This utility model belongs to field of medicine and chemical technology, especially relates to a kind of tower reaction for Dimethylcarbamide synthetic reaction
Device.
Background technology
Dimethylcarbamide be chemical pharmacy and dye industry important intermediate, both at home and abroad generally with carbamide, monomethyl amine be former
Material is synthetically produced.Traditional synthetic route adopts multistage reactor to connect, Discrete control reaction temperature, upstream gaseous state one
Methylamine is met in final stage reactor with the reactant liquor close to reaction end, and reaction is carried out with bubbling form, gaseous state one first of surplus
Amine inversely passes through reactor step by step, finally contacts in the first stage reactor with fresh molten state carbamide.Though this kind of method can guarantee that
That reacts in final stage reactor is fully carried out, and almost pure ammonia in discharge tail gas, but because of each stage reactor Central Plains material
Air-liquid is biphase to be bubble type contact so that biphase contact area is little, and mass transfer, heat transfer are still not abundant, cause reaction rate
Reduce, reaction time is elongated, required reactor quantity increases, and feed liquid need to be with gravity flow side to lower stage reactor by upper stage reactor
Formula is realized, and the requirement to floor space and space all improves.
Content of the invention
In view of this, this utility model is directed to a kind of tower reactor for Dimethylcarbamide synthetic reaction, to overcome
The deficiencies in the prior art, provide a kind of maximum increase biphase mass transfer of raw material air-liquid, heat transfer area to synthesize the tower of Dimethylcarbamide
Formula reactor.
For reaching above-mentioned purpose, the technical solution of the utility model is realized in：
A kind of tower reactor for Dimethylcarbamide synthetic reaction, is divided into upper tower segment and lower tower section two parts from top to bottom：
Described upper tower segment includes liquid distribution trough a, structured packing a, riser and catch box, described upper tower segment from top to bottom
Tower top offer vacuum pumping opening, the top of described structured packing a is provided with tower circulation fluid entrance, feeding line pass through described
Upper tower circulation fluid entrance is connected with described liquid distribution trough a, and the lower section of described catch box is provided with the outlet of tower circulation fluid, and upper tower follows
Ring liquid pipe line is passed through described upper tower circulation fluid outlet and is connected with described catch box, and described upper tower circulation fluid pipeline is divided into tie point
With the second branch road, described tie point connected with described feeding line through circulating pump a；
Described lower tower section includes liquid distribution trough b and structured packing b from top to bottom, and the top of described structured packing b is provided with
Lower tower circulation fluid entrance, the lower section of described structured packing b is provided with monomethyl amine gas feed and upper tower circulation fluid enters Xia Takou, described
The tower reactor of lower tower section is additionally provided with lower tower circulation fluid outlet, and described lower tower circulation fluid outlet is connected with discharging pipeline, described discharge nozzle
Line is divided into the 3rd branch road and the 4th branch road after circulating pump b, described 4th branch road pass through described lower tower circulation fluid entrance with described
Liquid distribution trough b connects, and described upper tower circulation fluid is entered lower tower mouth and connected with described second branch road.
Further, described vacuum pumping opening is connected with vacuum-pumping system.
Further, described tie point, the second branch road, the 3rd branch road and the 4th branch road are equipped with valve.
Further, the tower outer wall at catch box described in described upper tower segment is provided with heating semicanal.
Further, described heating semicanal is provided with tower heat conductive oil inlet and upper tower conduction oil outlet.
Further, the outer wall of described lower tower section tower reactor is provided with heating jacket.
Further, described heating jacket is provided with lower tower heat conductive oil inlet and lower tower conduction oil outlet.
Further, the outside of described upper tower segment and described lower tower section is equipped with attemperator, and described attemperator includes
But it is not limited to heat-preservation cotton.
Further, described feeding line is provided with inlet valve.
Further, for enabling upper and lower two parts reactant liquor preferably to disperse film forming, increase air-liquid two phase-contact surface
Long-pending, improve reaction mass transfer, heat transfer efficiency, be respectively provided with liquid distribution trough and structured packing；Upper tower segment setting catch box and circulating pump
A, lower tower section setting tower reactor and circulating pump b, are reacted with the independent loops of monomethyl amine with realizing reactant liquor.
Further, for ensureing the reaction temperature of described upper tower segment and described lower tower section, described catch box arranges semicanal companion
Heat, described lower tower section arranges jacket hot tracing.The heating-up temperature of described lower tower section is higher than described upper tower segment heating-up temperature.For preventing tower
Body heat content scatters and disappears, and full tower sets insulation construction.
With respect to prior art, this utility model has the advantage that：
(1) farthest increase the biphase mass transfer of raw material air-liquid, heat transfer area, increased reaction rate.
(2) reduce consersion unit quantity and floor space, be more suitable for commercial introduction application.
Brief description
The accompanying drawing constituting a part of the present utility model is used for providing further understanding to of the present utility model, and this practicality is new
The schematic description and description of type is used for explaining this utility model, does not constitute to improper restriction of the present utility model.?
In accompanying drawing：
Fig. 1 is this utility model example structure schematic diagram；
Description of reference numerals：
1- liquid distribution trough a；2- structured packing a；3- riser；4- catch box；5- heats semicanal；6- liquid distribution trough b；
7- structured packing b；8- circulating pump a；9- heating jacket；10- circulating pump b；11- valve；12- inlet valve；N1- monomethyl amine gas enters
Mouthful；N2- upper tower circulation fluid entrance；Tower circulation fluid entrance under N3-；N4- upper tower circulation fluid enters Xia Takou；N5- upper tower circulation fluid goes out
Mouthful；Tower circulation fluid outlet under N6-；N7- vacuum pumping opening；N8- upper tower heat conductive oil inlet；N9- upper tower conduction oil outlet；Under N10-
Tower heat conductive oil inlet；Tower conduction oil outlet under N11-；L1- feeding line；L2- upper tower circulation fluid pipeline；L3- tie point；L4-
Second branch road；L5- discharging pipeline；L6- the 3rd branch road；L7- the 4th branch road；L8- monomethyl amine Gas feed lines；H1- insulation dress
Put.
Specific embodiment
It should be noted that in the case of not conflicting, the embodiment in this utility model and the feature in embodiment can
To be mutually combined.
In description of the present utility model it is to be understood that term " " center ", " longitudinal ", " horizontal ", " on ", D score,
The orientation of instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward " or position relationship are
Based on orientation shown in the drawings or position relationship, it is for only for ease of description this utility model and simplifies description, rather than instruction
Or the hint device of indication or element must have specific orientation, with specific azimuth configuration and operation, be not therefore understood that
It is to restriction of the present utility model.Additionally, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicating
Or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, " first ", " second " etc. are defined
Feature can express or implicitly include one or more this feature.In description of the present utility model, unless separately
It is described, " multiple " are meant that two or more.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", " being connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or integratedly
Connect；Can be to be mechanically connected or electrically connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, on being understood by concrete condition
State concrete meaning in this utility model for the term.
To describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
A kind of tower reactor for Dimethylcarbamide synthetic reaction it is characterised in that：Be divided into from top to bottom upper tower segment and under
Tower section two parts：
Described upper tower segment includes liquid distribution trough a1, structured packing a2, riser 3 and catch box 4 from top to bottom, described on
The tower top of tower section offers vacuum pumping opening N7, and described vacuum pumping opening N7 is connected with vacuum-pumping system, described structured packing
The top of a1 is provided with tower circulation fluid entrance N2, and feeding line L1 is by described upper tower circulation fluid entrance N2 and described liquid distribution
Device a1 connects, and the tower outer wall at catch box 4 described in described upper tower segment is provided with heating semicanal 5, and described heating semicanal 5 is provided with
Tower heat conductive oil inlet N8 and upper tower conduction oil outlet N9, the lower section of described catch box 4 is provided with tower circulation fluid outlet N5, and upper tower follows
Ring liquid pipe line L2 is passed through described upper tower circulation fluid outlet N5 and is connected with described catch box 4, and described upper tower circulation fluid pipeline L2 is divided into
Tie point L3 and the second branch road L4, described tie point L3, the second branch road L4 are equipped with valve 11, on described feeding line
It is provided with inlet valve 12, described tie point L3 is connected with described feeding line L1 through circulating pump a8；
Described lower tower section includes liquid distribution trough b6 and structured packing b7 from top to bottom, and the outer wall of described lower tower section tower reactor sets
There is heating jacket 9, described heating jacket 9 is provided with lower tower heat conductive oil inlet N10 and lower tower conduction oil outlet N11, described regular
The top of filler b7 is provided with lower tower circulation fluid entrance N3, and the lower section of described structured packing b7 is provided with monomethyl amine gas feed N1 and upper
Tower circulation fluid enters lower tower mouth N4, and the tower reactor of described lower tower section is additionally provided with lower tower circulation fluid outlet N6, described lower tower circulation fluid outlet
N6 is connected with discharging pipeline L5, and described discharging pipeline L5 is divided into the 3rd branch road L6 and the 4th branch road L7 after circulating pump b10, described
Be equipped with valve 11 on 3rd branch road L6 and the 4th branch road L7, described 4th branch road L7 pass through described lower tower circulation fluid entrance N3 with
Described liquid distribution trough b6 connection, described upper tower circulation fluid is entered lower tower mouth N4 and is connected with described second branch road L4, described upper tower segment
It is equipped with attemperator H1 with the outside of described lower tower section.
First drive when, by two batches inferior quality identical molten state carbamide be simultaneously introduced respectively described upper tower segment catch box and
After lower tower section tower reactor, close the described inlet valve on described feeding line, open described circulating pump a and described circulating pump b, right
Upper and lower tower section material is circulated, and enters described liquid distribution trough a1 by upper tower circulation fluid entrance N2 respectively, is followed by described lower tower
Ring liquid entrance N3 enters described liquid distribution trough b6, realizes molten state carbamide in described structured packing a2 and described structured packing
B7 surface forms the liquid film distribution of continuous-stable to realize the gas-liquid mass transfer good with gaseous state monomethyl amine, heat transfer reaction.Gaseous state one
Methylamine is passed through by lower tower section monomethyl amine gas feed N1, and intake is excessive state with respect to lower tower section molten state urea amount, protects
The lower tower section carbamide of card reacts completely.Unreacted excessive monomethyl amine gas phase enters upper tower segment by riser 3, with upper tower segment melting
State carbamide is reacted, and now, with respect to the monomethyl amine amount rising, upper tower segment carbamide is excessive state, to ensure top vacuum
Bleeding point N7 by-product gas is pure ammonia.
After lower tower section carbamide total overall reaction, stop full tower circulation, exported by lower tower circulation fluid by lower tower section circulating pump b10
Qualified Dimethylcarbamide is discharged by N6, and the reactant liquor of upper tower segment not reaction completely is entered lower tower section by upper tower circulation fluid outlet N5
Upper tower circulation fluid enters lower tower mouth N4, adds a batch molten state carbamide in upper tower segment catch box 4, described in the moistening of open the circulation pump a8
Structured packing a2, gaseous state monomethyl amine is passed through by the monomethyl amine gas feed N1 of lower tower section, carries out next periodic reaction.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all this
Within the spirit of utility model and principle, any modification, equivalent substitution and improvement made etc., should be included in this utility model
Protection domain within.
Claims (9)
1. a kind of tower reactor for Dimethylcarbamide synthetic reaction it is characterised in that：It is divided into upper tower segment and Xia Ta from top to bottom
Section two parts：
Described upper tower segment includes liquid distribution trough a, structured packing a, riser and catch box, the tower of described upper tower segment from top to bottom
Back down and be provided with vacuum pumping opening, the top of described structured packing a is provided with tower circulation fluid entrance, feeding line passes through described upper tower
Circulation fluid entrance is connected with described liquid distribution trough a, and the lower section of described catch box is provided with the outlet of tower circulation fluid, upper tower circulation fluid
Pipeline is passed through described upper tower circulation fluid outlet and is connected with described catch box, and described upper tower circulation fluid pipeline is divided into tie point and the
Two branch roads, described tie point is connected with described feeding line through circulating pump a；
Described lower tower section includes liquid distribution trough b and structured packing b from top to bottom, and the top of described structured packing b is provided with lower tower
Circulation fluid entrance, the lower section of described structured packing b is provided with monomethyl amine gas feed and upper tower circulation fluid enters Xia Takou, described lower tower
The tower reactor of section is additionally provided with lower tower circulation fluid outlet, and described lower tower circulation fluid outlet is connected with discharging pipeline, described discharging pipeline warp
It is divided into the 3rd branch road and the 4th branch road, described 4th branch road passes through described lower tower circulation fluid entrance and described liquid after circulating pump b
Distributor b connects, and described upper tower circulation fluid is entered lower tower mouth and connected with described second branch road.
2. a kind of tower reactor for Dimethylcarbamide synthetic reaction according to claim 1 it is characterised in that：Described true
Empty bleeding point is connected with vacuum-pumping system.
3. a kind of tower reactor for Dimethylcarbamide synthetic reaction according to claim 1 it is characterised in that：Described
It is equipped with valve on one branch road, the second branch road, the 3rd branch road and the 4th branch road.
4. a kind of tower reactor for Dimethylcarbamide synthetic reaction according to claim 1 it is characterised in that：On described
Tower outer wall at catch box described in tower section is provided with heating semicanal.
5. a kind of tower reactor for Dimethylcarbamide synthetic reaction according to claim 4 it is characterised in that：Described plus
Hot semicanal is provided with tower heat conductive oil inlet and upper tower conduction oil outlet.
6. a kind of tower reactor for Dimethylcarbamide synthetic reaction according to claim 1 it is characterised in that：Under described
The outer wall of tower section tower reactor is provided with heating jacket.
7. a kind of tower reactor for Dimethylcarbamide synthetic reaction according to claim 6 it is characterised in that：Described plus
Thermal jacket is provided with lower tower heat conductive oil inlet and lower tower conduction oil outlet.
8. a kind of tower reactor for Dimethylcarbamide synthetic reaction according to claim 1 it is characterised in that：On described
The outside of tower section and described lower tower section is equipped with attemperator.
9. a kind of tower reactor for Dimethylcarbamide synthetic reaction according to claim 1 it is characterised in that：Described enter
Expects pipe line is provided with inlet valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620561524.2U CN205965801U (en) | 2016-06-08 | 2016-06-08 | A tower reactor for dimethyl urea building -up reactions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620561524.2U CN205965801U (en) | 2016-06-08 | 2016-06-08 | A tower reactor for dimethyl urea building -up reactions |
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| Publication Number | Publication Date |
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| CN205965801U true CN205965801U (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620561524.2U Active CN205965801U (en) | 2016-06-08 | 2016-06-08 | A tower reactor for dimethyl urea building -up reactions |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114315650A (en) * | 2021-12-10 | 2022-04-12 | 青岛科技大学 | Method and system for continuously producing dimethyl urea |
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2016
- 2016-06-08 CN CN201620561524.2U patent/CN205965801U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114315650A (en) * | 2021-12-10 | 2022-04-12 | 青岛科技大学 | Method and system for continuously producing dimethyl urea |
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