CN114146653A - Waterborne polyurethane production device and use method thereof - Google Patents
Waterborne polyurethane production device and use method thereof Download PDFInfo
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- CN114146653A CN114146653A CN202111475430.5A CN202111475430A CN114146653A CN 114146653 A CN114146653 A CN 114146653A CN 202111475430 A CN202111475430 A CN 202111475430A CN 114146653 A CN114146653 A CN 114146653A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0011—Heating features
- B01D1/0041—Use of fluids
- B01D1/0052—Use of a liquid transfer medium or intermediate fluid, e.g. bain-marie
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0082—Regulation; Control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0033—Other features
- B01D5/0036—Multiple-effect condensation; Fractional condensation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0033—Other features
- B01D5/0054—General arrangements, e.g. flow sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0057—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
- B01D5/006—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes with evaporation or distillation
- B01D5/0063—Reflux condensation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
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- Medicinal Chemistry (AREA)
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Abstract
The invention relates to a production device of waterborne polyurethane, which comprises a polymeric kettle, an emulsifying kettle arranged at the lower end of the polymeric kettle, a desolventizing kettle arranged at the lower end of the emulsifying kettle, and a desolventizing device arranged on the desolventizing kettle, wherein a steam inlet pipe is fixedly connected to a jacket of the desolventizing kettle, an automatic steam control valve is arranged on the steam inlet pipe, a condensed water inlet pipe is fixedly connected to the jacket of the desolventizing kettle, a circulating pump is arranged on the condensed water inlet pipe, a cooling water tank is connected to the condensed water inlet pipe, the desolventizing device comprises a first condenser fixedly connected to the upper end of the desolventizing kettle, the first condenser is vertically arranged at the upper end of the desolventizing kettle, a vacuum pump is connected to the first condenser, the first condenser is vertically arranged, so that the recovery effect of acetone is better, and as the condensation temperature of water is higher than that of acetone, most of water can be condensed and returned to the desolventizing kettle downwards when passing through the first condenser, the vertical installation of first condenser is convenient for water to return to in the desolventizing kettle for the purity of the acetone of retrieving is higher.
Description
Technical Field
The invention relates to the field of polyurethane production devices, in particular to a waterborne polyurethane production device and a using method thereof.
Background
The waterborne polyurethane has the characteristics of environmental protection, no toxicity, safety, nonflammability and the like, and is widely applied to various aspects such as adhesives, coatings, printing ink, artificial leather and the like. The acetone is low in toxicity, the reproducibility of the aqueous polyurethane synthesized by the acetone method is good, the product is relatively stable, the industrial operation is easy, and the method plays an important role in the production of the aqueous polyurethane. The existing waterborne polyurethane production device has the advantages of low acetone recovery efficiency, low recovery purity, environmental pollution, high product cost of single piece, complicated operation process and poor product stability.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a production device for waterborne polyurethane, which is high in acetone recovery purity, thorough in recovery, environment-friendly and pollution-free.
The invention adopts the technical scheme for solving the technical problems that: the synthetic leather production device comprises a polymerization kettle, an emulsifying kettle arranged at the lower end of the polymerization kettle, a desolventizing kettle arranged at the lower end of the emulsifying kettle, and a desolventizing device arranged on the desolventizing kettle, wherein a steam inlet pipe is fixedly connected to a jacket of the desolventizing kettle, a steam automatic control valve is arranged on the steam inlet pipe, a condensate water inlet pipe is fixedly connected to the jacket of the desolventizing kettle, a circulating pump is arranged on the condensate water inlet pipe, a cooling water tank is connected to the condensate water inlet pipe, the desolventizing device comprises a first condenser fixedly connected to the upper end of the desolventizing kettle, the first condenser is vertically arranged at the upper end of the desolventizing kettle, a vacuum pump is connected to the first condenser, the temperature of the desolventizing kettle is not strictly controlled, so that the temperature of the desolventizing kettle is controlled by steam, the synthetic leather production device is convenient to use and low in cost, the steam circulates in the desolventizing kettle, can ensure the sufficient heat exchange of emulsion, and can realize the evaporation of a solvent in the emulsion under the condition of large specific surface area, will improve solvent evaporation efficiency greatly, adopt the comdenstion water to cool down to desolventizing cauldron and make desolventizing cauldron's temperature can reduce in the twinkling of an eye, make the efficiency of device higher, the vacuum pump carries out the evacuation to desolventizing cauldron and makes acetone recovery effect better, the vertical installation of first condenser makes acetone's recovery effect better, because the condensing temperature of water is higher than acetone's condensing temperature, so water and acetone are when through first condenser, most of water can condense and get back to in the desolventizing cauldron downwards, the vertical installation of first condenser is convenient for in the water reflux desolventizing cauldron, make the purity of the acetone of retrieving higher.
For further perfection, be connected with the second condenser on the first condenser, first condenser passes through the second condenser and links to each other with the vacuum pump, and the second condenser has a plurality of and establishes ties and distributes, and the second condenser lower extreme is connected with total discharging pipe, and total discharging pipe lower extreme is connected with reation kettle, and a plurality of second condensers establish ties and make the purity of acetone recovery higher, and it is better to retrieve the effect, can make most acetone get into reation kettle in, and recovery efficiency is high, environmental protection more.
Further perfect, reation kettle has two, is connected with total discharging pipe respectively, can open another reation kettle after a reation kettle storage is full, and two reation kettle can replace the use for the device availability factor is high.
Further perfect, be connected with the third condenser on the vacuum pump outlet duct, third condensation gas lower extreme is connected with the collecting vessel, is connected with the blast pipe on the collecting vessel, and the third condenser can be retrieved the remaining acetone in the vacuum pump outlet duct for the acetone rate of recovery is higher, and the device is environmental protection more.
Further perfect, the third condenser lower extreme is connected with the fourth condenser, and the third condenser passes through the fourth condenser to be connected with the holding vessel, and the fourth condenser can further retrieve acetone for the acetone rate of recovery is higher, and the device is environmental protection more.
Further perfection, the third condensers are two and are connected in parallel, so that the working efficiency of the device is higher.
Further perfection, install active carbon in the blast pipe for the exhaust gas is more environmental protection, accomplishes really pollution-free.
Further perfecting, the desolventizing kettle adopts an anchor stirrer, can ensure the sufficient heat exchange of the emulsion, greatly improve the solvent evaporation efficiency, shorten the desolventizing time of the emulsion and ensure the quality of the final emulsion.
Further perfecting, install thermometer, manometer and observation window on the desolventizing kettle, be convenient for to the observation of desolventizing kettle reaction.
The use method of the waterborne polyurethane production device comprises the following steps:
the method comprises the following steps: starting a vacuum pump to vacuumize the desolventizing kettle, and ensuring the sealing of the desolventizing kettle;
step two: putting raw materials into a polymerization kettle, starting the polymerization kettle to polymerize the raw materials, opening a control valve on a connecting pipe connecting the polymerization kettle and an emulsifying kettle after polymerization is completed, allowing resin to automatically flow into the emulsifying kettle from the polymerization kettle through gravity for emulsification, opening the control valve on the connecting pipe connecting the emulsifying kettle and a desolventizing kettle after emulsification is completed, allowing the resin to automatically flow into the desolventizing kettle from the emulsifying kettle through gravity for desolventizing, and controlling the temperature of the desolventizing kettle to be between 50 and 60 ℃ through a steam automatic control valve, so that the safety performance is high;
step three: the water vapor and the acetone vapor enter a first condenser, and most of water is condensed and returns to the desolventizing kettle downwards due to the fact that the condensation temperature of the water is higher than that of the acetone;
step four: acetone steam continuously enters a second condenser, and most of acetone is condensed by the second condenser and falls into the reaction kettle;
step five: a small part of acetone enters the vacuum pump, enters the third condenser through an air outlet pipe of the vacuum pump, enters the fourth condenser through the third condenser, enters the collection tank through the fourth condenser, and is adsorbed and exhausted by activated carbon in the air outlet pipe;
step six: after desolventizing, closing the steam automatic control valve, starting the circulating pump, and rapidly cooling the desolventizing kettle through the circulation of condensed water, so that the resin in the desolventizing kettle can be collected.
The invention has the beneficial effects that: the invention not only has high acetone recovery purity, thorough recovery, but also is environment-friendly and pollution-free, the temperature control of the desolventizing kettle is not strict, so the temperature of the desolventizing kettle is controlled by adopting steam, the use is convenient and fast, the cost is low, the steam circulates in the jacket of the desolventizing kettle, the sufficient heat exchange of emulsion can be ensured, the solvent in the emulsion can be evaporated under the condition of large specific surface area, the evaporation efficiency of the solvent can be greatly improved, the desolventizing kettle is cooled by adopting condensed water, so the temperature of the desolventizing kettle can be instantly reduced, the efficiency of the device is higher, the acetone recovery effect is better by vacuumizing the desolventizing kettle by a vacuum pump, the acetone recovery effect is better by vertically installing the first condenser, as the condensation temperature of water is higher than the condensation temperature of acetone, most of water and acetone can be condensed and return to the desolventizing kettle downwards when passing through the first condenser, the first condenser is vertically installed, so that the water can be conveniently refluxed to the desolventizing kettle, make the purity of the acetone of retrieving higher, a plurality of second condensers establish ties and make the purity of acetone recovery higher, the recovery effect is better, can make most acetone get into reation kettle, the recovery efficiency is high, environmental protection more, two reation kettle can replace the use, make device availability factor high, the third condenser, the fourth condenser can be retrieved the remaining acetone in the vacuum pump gas outlet pipe, make the acetone rate of recovery higher, the device is environmental protection more, install the active carbon in the exhaust pipe, make the combustion gas environmental protection more, really accomplish pollution-free.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic view of the structure of a polymerizer of the invention;
FIG. 4 is a schematic structural view of a desolventizing kettle according to the present invention;
FIG. 5 is a schematic structural view of the desolventizing device of the present invention.
Description of reference numerals: 1. a polymerization kettle; 2. an emulsifying kettle; 3. a desolventizing kettle; 31. a steam inlet pipe and a steam outlet pipe; 311. the steam automatic control valve; 32. a condensed water inlet pipe and a condensed water outlet pipe; 321. a circulation pump; 322. a cooling water tank; 33. a thermometer; 34. a pressure gauge; 35. an observation window; 4. a desolventizing device; 41. a vacuum pump; 42. a first condenser; 43. a second condenser; 431. a total discharge pipe; 44. a third condenser; 45. a fourth condenser; 46. a reaction kettle; 47. a collection tank; 471. and (4) exhausting the gas.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1-4: the embodiment of the invention relates to a waterborne polyurethane production device, which comprises a polymerization kettle 1, an emulsifying kettle 2 arranged at the lower end of the polymerization kettle 1, a desolventizing kettle 3 arranged at the lower end of the emulsifying kettle 2, a desolventizing device 4 arranged on the desolventizing kettle 3, a steam inlet pipe 31 fixedly connected to a jacket of the desolventizing kettle 3, an automatic steam control valve 311 arranged on the steam inlet pipe 31, a condensed water inlet pipe 32 fixedly connected to a jacket of the desolventizing kettle 3, a circulating pump 321 arranged on the condensed water inlet pipe 32, a cooling water tank 322 connected to the condensed water inlet pipe 32, an anchor stirrer adopted by the desolventizing kettle 3, a thermometer 33, a pressure gauge 34 and an observation window 35 arranged on the desolventizing kettle 3.
As shown in fig. 1-5: the desolventizing device 4 comprises a first condenser 42 fixedly connected to the upper end of the desolventizing kettle 3, the first condenser 42 is vertically installed at the upper end of the desolventizing kettle 3, a vacuum pump 41 is connected to the first condenser 42, a second condenser 43 is connected to the first condenser 42, the first condenser 42 is connected to the vacuum pump 41 through the second condenser 43, a plurality of second condensers 43 are distributed in series, the lower end of each second condenser 43 is connected to a main discharging pipe 431, the lower end of each main discharging pipe 431 is connected to a reaction kettle 46, two reaction kettles 46 are connected to the main discharging pipes 431 respectively, a third condenser 44 is connected to an air outlet pipe of the vacuum pump 41, the lower end of the third condensed gas is connected to a collecting tank 47, an air outlet pipe 471 is connected to the collecting tank 47, activated carbon is installed in the air outlet pipe 471, the lower end of the third condenser 44 is connected to a fourth condenser 45, the third condenser 44 is connected to the collecting tank 47 through the fourth condenser 45, there are two third condensers 44 and they are connected in parallel to each other.
The use method of the waterborne polyurethane production device comprises the following steps:
the method comprises the following steps: starting a vacuum pump 41 to vacuumize the desolventizing kettle 3, and ensuring the sealing of the desolventizing kettle 3;
step two: putting raw materials into a polymerizer 1, starting the polymerizer 1 to polymerize the raw materials, opening a control valve on a connecting pipe connecting the polymerizer 1 and an emulsifying kettle 2 after polymerization is completed, allowing resin to automatically flow from the polymerizer 1 into the emulsifying kettle 2 by gravity for emulsification, opening a control valve on a connecting pipe connecting the emulsifying kettle 2 and a desolventizing kettle 3 after emulsification is completed, allowing the resin to automatically flow from the emulsifying kettle 2 into the desolventizing kettle 3 by gravity for desolventizing, and controlling the temperature of the desolventizing kettle 3 to be between 50 and 60 ℃ by a steam automatic control valve 311;
step three: the water vapor and the acetone vapor enter the first condenser 42, and most of the water is condensed and returns to the desolventizing kettle 3 because the condensation temperature of the water is higher than that of the acetone;
step four: the acetone vapor continues to enter the second condenser 43, and most of the acetone is condensed by the second condenser 43 and falls into the reaction kettle 46;
step five: a small amount of acetone enters the vacuum pump 41, enters the third condenser 44 through an air outlet pipe of the vacuum pump 41, enters the fourth condenser 45 through the third condenser 44, enters the collection tank 47 through the fourth condenser 45, and is exhausted through adsorption of activated carbon in the exhaust pipe 471 by air in the collection tank 47;
step six: after the desolventizing is finished, the automatic steam control valve 311 is closed, the circulating pump 321 is started, the desolventizing kettle 3 is rapidly cooled through the circulation of condensed water, and then the resin in the desolventizing kettle 3 can be collected.
While the invention has been shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.
Claims (10)
1. The utility model provides an aqueous polyurethane apparatus for producing, includes polymeric kettle (1), installs emulsion cauldron (2) at polymeric kettle (1) lower extreme, installs desolventizing cauldron (3) at emulsion cauldron (2) lower extreme, installs desolventizing device (4) on desolventizing cauldron (3), characterized by: the desolventizing device is characterized in that a steam inlet-outlet pipe (31) is fixedly connected to a jacket of the desolventizing kettle (3), a steam automatic control valve (311) is installed on the steam inlet-outlet pipe (31), a condensate water inlet-outlet pipe (32) is fixedly connected to the jacket of the desolventizing kettle (3), a circulating pump (321) is installed on the condensate water inlet-outlet pipe (32), a cooling water tank (322) is connected to the condensate water inlet-outlet pipe (32), the desolventizing device (4) comprises a first condenser (42) fixedly connected to the upper end of the desolventizing kettle (3), the first condenser (42) is vertically installed at the upper end of the desolventizing kettle (3), and a vacuum pump (41) is connected to the first condenser (42).
2. The apparatus for producing aqueous polyurethane according to claim 1, wherein: be connected with second condenser (43) on first condenser (42), first condenser (42) link to each other with vacuum pump (41) through second condenser (43), and second condenser (43) have a plurality of and series distribution, and second condenser (43) lower extreme is connected with total discharging pipe (431), and total discharging pipe (431) lower extreme is connected with reation kettle (46).
3. The apparatus for producing aqueous polyurethane according to claim 2, wherein: the number of the reaction kettles (46) is two, and the two reaction kettles are respectively connected with a main discharge pipe (431).
4. The apparatus for producing aqueous polyurethane according to claim 2, wherein: and a third condenser (44) is connected to the air outlet pipe of the vacuum pump (41), the lower end of the third condensed gas is connected with a collecting tank (47), and an exhaust pipe (471) is connected to the collecting tank (47).
5. The apparatus for producing aqueous polyurethane according to claim 4, wherein: the lower end of the third condenser (44) is connected with a fourth condenser (45), and the third condenser (44) is connected with a collecting tank (47) through the fourth condenser (45).
6. The apparatus for producing aqueous polyurethane according to claim 5, wherein: the third condensers (44) are two and are connected in parallel with each other.
7. The apparatus for producing aqueous polyurethane according to claim 6, wherein: and activated carbon is arranged in the exhaust pipe (471).
8. The apparatus for producing aqueous polyurethane according to claim 1, wherein: the desolventizing kettle (3) adopts an anchor stirrer.
9. The apparatus for producing aqueous polyurethane according to claim 1, wherein: and a thermometer (33), a pressure gauge (34) and an observation window (35) are arranged on the desolventizing kettle (3).
10. A method for using the apparatus for producing aqueous polyurethane according to claim 7, wherein: the method comprises the following steps:
the method comprises the following steps: starting a vacuum pump (41) to vacuumize the desolventizing kettle (3) to ensure the sealing of the desolventizing kettle (3);
step two: putting raw materials into a polymerization kettle (1), starting the polymerization kettle (1) to polymerize the raw materials, opening a control valve on a connecting pipe connecting the polymerization kettle (1) and an emulsifying kettle (2) after polymerization is completed, allowing resin to automatically flow from the polymerization kettle (1) into the emulsifying kettle (2) through gravity to emulsify, opening a control valve on a connecting pipe connecting the emulsifying kettle (2) and a desolventizing kettle (3) after emulsification is completed, allowing the resin to automatically flow from the emulsifying kettle (2) into the desolventizing kettle (3) through gravity to desolventize, and controlling the temperature of the desolventizing kettle (3) to be between 50 and 60 ℃ through a steam automatic control valve (311);
step three: the water vapor and the acetone vapor enter a first condenser (42), and most of water is condensed and returns to the desolventizing kettle (3) because the condensation temperature of the water is higher than that of the acetone;
step four: the acetone steam continuously enters a second condenser (43), and most of acetone is condensed and falls into the reaction kettle (46) through the second condenser (43);
step five: a small amount of acetone enters the vacuum pump (41), enters the third condenser (44) through an air outlet pipe of the vacuum pump (41), enters the fourth condenser (45) through the third condenser (44) in a condensation mode, enters the collection tank (47) through the fourth condenser (45), and is exhausted through activated carbon adsorption in an exhaust pipe (471) through air in the collection tank (47);
step six: after the desolventizing is finished, the automatic steam control valve (311) is closed, the circulating pump (321) is started, the desolventizing kettle (3) is rapidly cooled through the circulation of condensed water, and then the resin in the desolventizing kettle (3) can be collected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111475430.5A CN114146653A (en) | 2021-12-06 | 2021-12-06 | Waterborne polyurethane production device and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111475430.5A CN114146653A (en) | 2021-12-06 | 2021-12-06 | Waterborne polyurethane production device and use method thereof |
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Cited By (2)
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| CN114957583A (en) * | 2022-04-24 | 2022-08-30 | 丽水镇铭新材料科技有限公司 | Production process of waterborne polyurethane resin |
| CN116440803A (en) * | 2023-06-16 | 2023-07-18 | 北京湃普莱恩尼龙新材料技术有限公司 | Preparation process and preparation device of polyamide |
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| CN114957583A (en) * | 2022-04-24 | 2022-08-30 | 丽水镇铭新材料科技有限公司 | Production process of waterborne polyurethane resin |
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