CN202212185U - Reaction distillation device for preparing trioxymethylene - Google Patents
Reaction distillation device for preparing trioxymethylene Download PDFInfo
- Publication number
- CN202212185U CN202212185U CN2011202707292U CN201120270729U CN202212185U CN 202212185 U CN202212185 U CN 202212185U CN 2011202707292 U CN2011202707292 U CN 2011202707292U CN 201120270729 U CN201120270729 U CN 201120270729U CN 202212185 U CN202212185 U CN 202212185U
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- distillation device
- column plate
- reaction distillation
- heater
- reaction
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model discloses a reaction distillation device for preparing trioxymethylene, which comprises a reaction distiller, a heater and a circulation pump. A feeding pipe is arranged on the left side of the reaction distiller, a discharging pipe is disposed on the upper portion of the reaction distiller, a bed discharge outlet at the bottom of the reaction distiller is communicated with a feed inlet of the bottom of the heater by a pipeline provided with the circulation pump, a tower plate is mounted inside the reaction distiller and consists of an upper tower plate and a lower tower plate, and a top discharge outlet of the heater is communicated with a return port on the right side of the reaction distiller by a return pipe. Evaporation of the trioxymethylene is accelerated by the aid of the additional circulation pump and the distillation tower plate, and one-way conversion rate of the trioxymethylene is improved.
Description
Technical field
The utility model relates to a kind of reaction distillation device, especially a kind of reaction distillation device for preparing metaformaldehyde.
Background technology
Metaformaldehyde is the monomer of engineering plastics polyformaldehyde, along with the market demand increase of acetal resin, improves metaformaldehyde synthesis reactor space-time yield and becomes the key link in the domestic polyformaldehyde production.
Metaformaldehyde is synthetic to be raw material with the concentrated formaldehyde aqueous solution usually, is catalyst with acid, and this reaction is reversible reaction, and reaction equilibrium constant is less.At raw material formaldehyde mass fraction is 60% o'clock, and the metaformaldehyde conversion ratio is merely about 6%.And utilize metaformaldehyde in the aqueous solution, to form minimum azeotropic mixture and the higher characteristics of relative volatility, and with the reactant liquor heating evaporation, adopt vapour phase to draw the mode of product in the building-up process, the formaldehyde conversion per pass is improved.The synthesis device of metaformaldehyde is generally heater and directly is the heat supply of reaction distillation device, and the material cycle efficieny is low, and the mean residence time of reactant liquor is low; Disengagement area is little; Can not remove metaformaldehyde timely, cause the combined coefficient of metaformaldehyde low, and synthetic cost be very high; Therefore, the cost of reduction metaformaldehyde becomes the direction of current research.
The utility model content
The technical problem that the utility model will solve provides a kind of reaction distillation device for preparing metaformaldehyde.
A kind of reaction distillation device for preparing metaformaldehyde of the utility model comprises: the reaction distillation device comprises reaction distillation device, heater and circulating pump;
Said reaction distillation device left side is provided with feed pipe, and top is provided with discharge nozzle, and the bed material outlet of its bottom is connected through the pipeline that circulating pump is housed with the charging aperture of heater base; The top discharge mouth of said heater is connected through the feed back pipe with the feedback outlet on reaction distillation device right side; Column plate is equipped with in its inside; Said column plate is made up of last column plate and following column plate; Last column plate by first level board and with the one of which side direction under first down-flow plate form, following column plate by second level board be located at the downflow weir that makes progress of its both sides and the second downward down-flow plate respectively and form;
Be evenly equipped with through hole on first level board of the last column plate of said column plate and second level board of following column plate;
Said heater adopts the steam mode to heat;
Between reaction distillation device and heater, add circulating pump; Be used for improving liquid velocity and heat transfer coefficient through the forced circulation external heating mode; Augmentation of heat transfer also reduces the mean residence time of reactant liquor; In time remove the reactant metaformaldehyde, impel the synthetic reaction forward to carry out, can effectively improve the combined coefficient of metaformaldehyde.
In the reaction distillation device, add column plate, can increase the disengagement area of material, promote synthetic reaction to carry out, further improve the combined coefficient of metaformaldehyde to the positive reaction direction.The said number of plates can increase and decrease according to actual needs in right amount.
Adopt the beneficial effect that technique scheme produced to be:
Between reaction distillation device and heater, add circulating pump and force the material circulation, further heat, reduce the mean residence time of reactant liquor through heater; Add column plate in the reaction distillation device, the disengagement area of augmenting response liquid is in time removed the reactant metaformaldehyde, effectively improves the combined coefficient of metaformaldehyde.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is done further detailed explanation.
Fig. 1 is the structural representation of the utility model;
Fig. 2 is a shaft side figure of going up column plate 7 among Fig. 1;
Fig. 3 is the shaft side figure of following column plate 8 among Fig. 1.
1, reaction distillation device; 2, heater; 3, circulating pump; 4, feed pipe; 5, discharge nozzle; 6, feed back pipe; 7, go up column plate; 8, following column plate; 9, feedback outlet; 10, first down-flow plate; 11, downflow weir; 12, through hole; 13, second down-flow plate; 14, first level board; 15, second level board.
The specific embodiment
The reaction distillation device comprises reaction distillation device 1, heater 2 and circulating pump 3;
Said reaction distillation device 1 left side is provided with feed pipe 4, and top is provided with discharge nozzle 5, and the bed material outlet of its bottom is connected through the pipeline that circulating pump 3 is housed with the charging aperture of heater 2 bottoms; Column plate is equipped with in its inside; Said column plate is made up of with following column plate 8 last column plate 7; Last column plate 7 by under first level board 14 and the one of which side direction first down-flow plate 10 forms, following column plate 8 is made up of second level board 15 and downflow weir that makes progress 11 and the second downward down-flow plate 13 of being located at its both sides respectively; Be evenly equipped with through hole 12 on first level board 14 of said upward column plate 7 and second level board 15 of following column plate 8;
The top discharge mouth of said heater 2 is connected through feed back pipe 6 with the feedback outlet 9 on reaction distillation device 1 right side;
The quantity of said column plate can have more actual needs and suitably increase and decrease;
Formaldehyde through concentrating gets into reaction distillation device 1 through material feeding tube 4; The bottom material is through circulating pump 3 forced circulation; Heating in heater 2, the material after the heating is got back to reaction distillation device 1 through piping 6, and streams is through column plate; Steam rises to reaction distillation device 1 top, gets into subsequent processing through discharge nozzle 5.
Claims (2)
1. a reaction distillation device for preparing metaformaldehyde is characterized in that said reaction distillation device comprises reaction distillation device (1), heater (2) and circulating pump (3);
Said reaction distillation device (1) left side is provided with feed pipe (4), and top is provided with discharge nozzle (5), and the bed material outlet of bottom is connected through the pipeline that circulating pump (3) is housed with the charging aperture of heater (2) bottom; The top discharge mouth of said heater (2) is connected through feed back pipe (6) with the feedback outlet (9) on reaction distillation device (1) right side; On the inside side walls of feedback outlet (9) one sides of said reaction distillation device (1) column plate is housed.
2. a kind of according to claim 1 reaction distillation device for preparing metaformaldehyde; Said column plate is made up of last column plate (7) and following column plate (8); Last column plate (7) is formed by first level board (14) with first down-flow plate (10) under the one of which side direction, following column plate (8) by second level board (15) be located at the downflow weir that makes progress (11) of its both sides and downward second down-flow plate (13) respectively and form; Be evenly equipped with through hole (12) on first level board (14) of said upward column plate (7) and second level board (15) of following column plate (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202707292U CN202212185U (en) | 2011-07-28 | 2011-07-28 | Reaction distillation device for preparing trioxymethylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202707292U CN202212185U (en) | 2011-07-28 | 2011-07-28 | Reaction distillation device for preparing trioxymethylene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202212185U true CN202212185U (en) | 2012-05-09 |
Family
ID=46011457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202707292U Expired - Lifetime CN202212185U (en) | 2011-07-28 | 2011-07-28 | Reaction distillation device for preparing trioxymethylene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202212185U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108329294A (en) * | 2018-04-10 | 2018-07-27 | 中国科学院成都有机化学有限公司 | Formaldehyde prepares the coupling process of metaformaldehyde |
-
2011
- 2011-07-28 CN CN2011202707292U patent/CN202212185U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108329294A (en) * | 2018-04-10 | 2018-07-27 | 中国科学院成都有机化学有限公司 | Formaldehyde prepares the coupling process of metaformaldehyde |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120509 |