Desolventizing device for producing waterborne polyurethane emulsion

Abstract

The utility model discloses a desolventizing device for producing waterborne polyurethane emulsion, relates to the technical field of waterborne polyurethane, and provides the following scheme aiming at the problems that waterborne polyurethane is left on the inner wall of a kettle body and the practicability is low due to the fact that the waterborne polyurethane emulsion attached to the inner wall of the kettle body is not scraped in the background technology. Comprising a desolventizing kettle, a stirring mechanism is arranged in the desolventizing kettle, the stirring mechanism comprises a stirring motor, a stirring shaft connected to the outer wall of the bottom end of an output shaft of the stirring motor through a coupler, a plurality of scrapers fixedly arranged on the outer wall of the lower portion of the stirring shaft and a plurality of stirring blades fixedly arranged on the outer wall of the lower portion of the stirring shaft, and a cooling mechanism is arranged on one side of the desolventizing kettle. The cooling mechanism comprises two mounting blocks which are fixedly arranged on the outer wall of one side of the desolventizing kettle respectively. According to the desolventizing kettle, the waterborne polyurethane attached to the inner wall of the desolventizing kettle can be cleaned while the waterborne polyurethane in the desolventizing kettle is stirred, so that the waste of the waterborne polyurethane is prevented, and the practicability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to waterborne polyurethane technical field especially relates to a kind of for waterborne polyurethane emulsion production's desolventizing device. BACKGROUND

[0002] Waterborne polyurethane is a new polyurethane system with water instead of organic solvent as dispersion medium, also called water dispersion polyurethane, waterborne polyurethane or water-based polyurethane, when producing waterborne polyurethane using acetone method, solvent (acetone, methyl ethyl ketone) in waterborne polyurethane emulsion needs to be desolventized.

[0003] Through retrieval, China patent (application number is "202322269954.X") discloses "a kind of for waterborne polyurethane emulsion desolventizing device", above-mentioned device includes kettle body, still includes multiple steam pipes, desolventizing cavity and solvent recovery tank, at least one steam pipe bottom is provided with necking head, remaining steam pipe is provided with steam collecting cover;The inside of steam collecting cover is provided with first screen body;Desolventizing cavity includes closed cavity, closed cavity includes large semicircle cavity and small semicircle cavity, necking section is provided between large semicircle cavity and small semicircle cavity;The bottom of closed cavity is integrally made with the same number of connecting pipe sections as steam pipe;Connecting pipe section and steam pipe are sealedly connected by flange, but, above-mentioned device does not scrape the waterborne polyurethane emulsion attached on kettle body inner wall when stirring waterborne polyurethane emulsion, cause waterborne polyurethane to remain on kettle body inner wall, low practicality. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of for waterborne polyurethane emulsion production's desolventizing device, solve the desolventizing device without scraping the waterborne polyurethane emulsion attached on kettle body inner wall in the problem of comparative file, cause waterborne polyurethane to remain on kettle body inner wall, low practicality.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a kind of desolventizing device for waterborne polyurethane emulsion production, including desolventizing kettle, stirring mechanism is equipped in the desolventizing kettle, the stirring mechanism includes stirring motor, stirring shaft is connected to the stirring motor output shaft bottom end outer wall by shaft coupling, several fixedly arranged on the stirring shaft lower outer wall scraper and several fixedly arranged on the stirring shaft lower outer wall stirring blade, one side of the desolventizing kettle is equipped with cooling mechanism, the cooling mechanism includes two respectively fixedly arranged on the one side outer wall of desolventizing kettle mounting block and upper portion and lower portion respectively penetrate and fixedly arranged on the outer wall of two mounting blocks cooling cylinder, heat exchange component is equipped in the cooling cylinder, the heat exchange component includes fixedly arranged on the upper inner wall of desolventizing kettle flow guide cover, several heat exchange pipes and fixedly arranged on the lower inner wall of desolventizing kettle fixed cover, one side lower portion of the cooling cylinder is equipped with filtering mechanism, the filtering mechanism includes fixedly arranged on the inner wall of one side lower portion of cooling cylinder installation pipe and waterproof air-permeable membrane embedded in installation pipe, one side of the cooling cylinder is equipped with vacuum pump.

[0007] Preferably, the inner wall of the bottom of the desolventizing kettle is fixedly provided with a discharge pipe, and a ball valve is mounted on one end of the outer wall of the discharge pipe, the inner wall of the top of the desolventizing kettle is fixedly provided with a feed hopper, and a sealing cover is hingedly connected to the top end of the feed hopper.

[0008] Preferably, the outer wall of the top of the desolventizing kettle is fixedly provided with a mounting bracket, and the stirring motor is connected to the outer wall of the top of the mounting bracket by bolts, the outer wall of the middle of the stirring shaft is connected to a fixed block by a bearing, and the two ends of the fixed block are fixedly arranged on the inner wall of the middle of the desolventizing kettle, and the plurality of scrapers are respectively abutted on the inner wall of the lower portion of the desolventizing kettle.

[0009] Through the above scheme, the stirring motor output shaft drives the stirring shaft to rotate, the stirring shaft drives the plurality of scrapers and the plurality of stirring blades to rotate, the stirring blades stir the waterborne polyurethane emulsion in the desolventizing kettle, and the plurality of scrapers rotate along the inner wall of the desolventizing kettle to clean the waterborne polyurethane adhered to the inner wall of the lower portion and the bottom of the desolventizing kettle.

[0010] Preferably, the inner wall of the upper portion of one side of the cooling cylinder is fixedly provided with a water inlet pipe, the inner wall of the lower portion of one side of the cooling cylinder is fixedly provided with a water outlet pipe, the inner wall of the bottom of the cooling cylinder is fixedly provided with a liquid discharge pipe, the inner wall of the top of the cooling cylinder is fixedly provided with a conveying pipe, and one end of the conveying pipe is fixedly arranged on the inner wall of the upper portion of one side of the desolventizing kettle.

[0011] Preferably, the upper portions of the plurality of heat exchange pipes are respectively fixedly arranged on the inner wall of the bottom of the flow guide cover, and the lower portions of the plurality of heat exchange pipes are respectively fixedly arranged on the inner wall of the top of the fixed cover.

[0012] Preferably, the outer wall of one end of the installation pipe is fixedly provided with a flange, the inner wall of the air inlet end of the vacuum pump is screwed with a connecting pipe, and the connecting pipe is connected to the outer wall of one end of the installation pipe by the flange.

[0013] Through the above scheme, by vacuum pump operation, the acetone steam in the desolventizing kettle is sucked into the space composed of the upper part of the cooling cylinder and the fairing, then the acetone steam enters into the heat exchange pipe, the acetone steam is condensed in the heat exchange pipe, at the same time, the cold water is pumped into the cooling cylinder, the cold water in the cooling cylinder exchanges heat with the heat exchange pipe, the hot water enters into the water storage tank, and the liquefied acetone solution is discharged from the liquid discharge pipe.

[0014] The utility model discloses the beneficial effects are:

[0015] The stirring motor output shaft drives the stirring shaft to rotate, the stirring shaft drives the plurality of scrapers and the plurality of stirring blades to rotate, the stirring blade stirs the water-based polyurethane emulsion in the desolventizing kettle, and the plurality of scrapers rotate along the inner wall of the desolventizing kettle, and the scraper cleans the water-based polyurethane attached to the inner wall of the lower part and the bottom of the desolventizing kettle, can clean the water-based polyurethane attached to the inner wall of the desolventizing kettle while stirring the water-based polyurethane in the desolventizing kettle, prevent the waste of water-based polyurethane, and improve practicality. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 The utility model provides a whole front view structure schematic diagram of a desolventizing device for water-based polyurethane emulsion production.

[0017] Fig. 2 The utility model provides a partial section structure schematic diagram of a desolventizing device for water-based polyurethane emulsion production.

[0018] Fig. 3 The utility model provides a stirring mechanism front view structure schematic diagram of a desolventizing device for water-based polyurethane emulsion production.

[0019] Fig. 4 The utility model provides a cooling mechanism front view structure schematic diagram of a desolventizing device for water-based polyurethane emulsion production.

[0020] Fig. 5 The utility model provides a heat exchange mechanism front view structure schematic diagram of a desolventizing device for water-based polyurethane emulsion production.

[0021] Fig. 6 The utility model provides a filter mechanism section structure schematic diagram of a desolventizing device for water-based polyurethane emulsion production.

[0022] In the figure: 1, desolventizing kettle; 2, feed hopper; 3, stirring mechanism; 301, mounting frame; 302, stirring motor; 303, stirring shaft; 304, fixed block; 305, scraper; 306, stirring blade; 4, cooling mechanism; 401, mounting block; 402, cooling cylinder; 403, water inlet pipe; 404, water outlet pipe; 405, liquid discharge pipe; 5, conveying pipe; 6, heat exchange assembly; 601, flow guide cover; 602, heat exchange pipe; 603, fixed cover; 7, filtering mechanism; 701, mounting pipe; 702, waterproof air permeable membrane; 8, vacuum pump. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0024] Embodiment 1, refer to Figs. 1-3 A desolventizing device for producing water-based polyurethane emulsion, comprising a desolventizing kettle 1, a discharge pipe is fixedly arranged on the inner wall of the bottom of the desolventizing kettle 1, a ball valve is clamped and arranged on the outer wall of one end of the discharge pipe, a feed hopper 2 is fixedly arranged on the inner wall of the top of the desolventizing kettle 1, a sealing cover is hingedly connected to the top end of the feed hopper 2, a stirring mechanism 3 is arranged in the desolventizing kettle 1, the stirring mechanism 3 comprises a stirring motor 302, a stirring shaft 303 connected to the output shaft of the stirring motor 302 through a shaft coupling, a plurality of scrapers 305 fixedly arranged on the outer wall of the lower part of the stirring shaft 303 and a plurality of stirring blades 306 fixedly arranged on the outer wall of the lower part of the stirring shaft 303, a mounting frame 301 is fixedly arranged on the outer wall of the top of the desolventizing kettle 1, the stirring motor 302 is connected to the outer wall of the top of the mounting frame 301 through bolts, the fixed block 304 is connected to the middle part of the outer wall of the stirring shaft 303 through a bearing, the two ends of the fixed block 304 are fixedly arranged on the inner wall of the middle part of the desolventizing kettle 1, and the plurality of scrapers 305 abut against the inner wall of the lower part of the desolventizing kettle 1.

[0025] Embodiment 2, refer to Figs. 4-6The utility model provides a kind of desolventizing device for waterborne polyurethane emulsion production, still including cooling mechanism 4, cooling mechanism 4 includes two installation blocks 401 respectively fixed on the outer wall of one side of desolventizing kettle 1 and upper portion and lower portion are respectively through and fixed on the outer wall of two installation blocks 401 cooling cylinder 402, the upper portion inner wall of one side of cooling cylinder 402 is fixed with inlet pipe 403, the lower portion inner wall of one side of cooling cylinder 402 is fixed with outlet pipe 404, the bottom inner wall of cooling cylinder 405 is fixed with drain pipe 405, the lower portion of cooling cylinder 402 is equipped with water storage tank, and water storage tank is equipped with circulating pump, and one end of circulating pump is connected with inlet pipe 403 by hose, and one end of outlet pipe is connected with water storage tank by hose, and the top inner wall of cooling cylinder 402 is fixed with conveying pipe 5, and one end of conveying pipe 5 is fixed on the upper portion inner wall of one side of desolventizing kettle 1, and the inner wall of cooling cylinder 402 is equipped with heat exchange component 6, and heat exchange component 6 includes flow guide cover 601 fixed on the upper portion inner wall of desolventizing kettle 1, a plurality of heat exchange pipes 602 and fixed cover 603 fixed on the lower portion inner wall of desolventizing kettle 1, and the upper portion of a plurality of heat exchange pipes 602 is respectively fixed on the bottom inner wall of flow guide cover 601, and the lower portion of a plurality of heat exchange pipes 602 is respectively fixed on the top inner wall of fixed cover 603, and the lower portion of one side of cooling cylinder 402 is equipped with filtering mechanism 7, and filtering mechanism 7 includes installation pipe 701 fixed on the lower portion inner wall of one side of cooling cylinder 402 and waterproof air-permeable membrane 702 embedded in installation pipe 701, and the outer wall of one end of installation pipe 701 is fixed with flange, and one side of cooling cylinder 402 is equipped with vacuum pump 8, and the inner wall of suction end of vacuum pump 8 is screwed with connecting pipe, and connecting pipe is connected on the outer wall of one end of installation pipe 701 by flange.

[0026] Working principle: the output shaft of stirring motor 302 drives stirring shaft 303 to rotate, and stirring shaft 303 drives a plurality of scrapers 305 and a plurality of stirring blades 306 to rotate, and stirring blades 306 stir waterborne polyurethane emulsion in desolventizing kettle 1, and a plurality of scrapers 305 rotate along the inner wall of desolventizing kettle 1, and scraper 305 cleans waterborne polyurethane adhered to the inner wall of the lower portion and bottom of desolventizing kettle 1, and vacuum pump 8 operates, and the acetone steam in desolventizing kettle 1 is sucked into the space formed by the upper portion of cooling cylinder 402 and flow guide cover 601, and then the acetone steam enters heat exchange pipe 602, and the acetone steam condenses in heat exchange pipe 602, and cold water enters cooling cylinder 402 by circulating pump, and the cold water in cooling cylinder 402 exchanges heat with heat exchange pipe 602, and hot water enters water storage tank, and the liquefied acetone solution is discharged from drain pipe 405.

[0027] The above is only the preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this, and any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A desolventizing device for waterborne polyurethane emulsion production, comprising a desolventizing kettle (1), characterized in that, The desolventizing kettle (1) is provided with a stirring mechanism (3), the stirring mechanism (3) comprises a stirring motor (302), a stirring shaft (303) connected to the bottom end outer wall of the output shaft of the stirring motor (302) through a shaft coupling, a plurality of scrapers (305) fixedly arranged on the lower outer wall of the stirring shaft (303) and a plurality of stirring blades (306) fixedly arranged on the lower outer wall of the stirring shaft (303); One side of the desolventizing kettle (1) is provided with a cooling mechanism (4), the cooling mechanism (4) comprises two mounting blocks (401) fixedly arranged on the outer wall of one side of the desolventizing kettle (1) and a cooling cylinder (402) penetrating through the outer wall of the two mounting blocks (401) and fixedly arranged on the upper and lower portions of the two mounting blocks (401); The cooling cylinder (402) is provided with a heat exchange assembly (6), the heat exchange assembly (6) comprises a flow guide cover (601) fixedly arranged on the inner wall of the upper portion of the desolventizing kettle (1), a plurality of heat exchange pipes (602) and a fixing cover (603) fixedly arranged on the inner wall of the lower portion of the desolventizing kettle (1); The lower portion of one side of the cooling cylinder (402) is provided with a filtering mechanism (7), the filtering mechanism (7) comprises a mounting pipe (701) fixedly arranged on the inner wall of the lower portion of one side of the cooling cylinder (402) and a waterproof and breathable membrane (702) embedded in the mounting pipe (701); One side of the cooling cylinder (402) is provided with a vacuum pump (8).

2. The desolventizing device for producing waterborne polyurethane emulsion according to claim 1, characterized in that, A discharge pipe is fixedly arranged on the inner wall of the bottom of the desolventizing kettle (1), a ball valve is clamped and mounted on the outer wall of one end of the discharge pipe, a feed hopper (2) is fixedly arranged on the inner wall of the top of the desolventizing kettle (1), and a sealing cover is hinged to the top end of the feed hopper (2).

3. The desolventizing device for producing waterborne polyurethane emulsion according to claim 1, characterized in that, An installation rack (301) is fixedly arranged on the outer wall of the top of the desolventizing kettle (1), the stirring motor (302) is connected to the outer wall of the top of the installation rack (301) through bolts, a fixing block (304) is connected to the outer wall of the middle portion of the stirring shaft (303) through a bearing, the fixing block (304) is fixedly arranged on the inner wall of the middle portion of the desolventizing kettle (1) at two ends, and the plurality of scrapers (305) abut against the inner wall of the lower portion of the desolventizing kettle (1).

4. The desolventizing device for producing waterborne polyurethane emulsion according to claim 1, characterized in that, A water inlet pipe (403) is fixedly arranged on the inner wall of the upper portion of one side of the cooling cylinder (402), a water outlet pipe (404) is fixedly arranged on the inner wall of the lower portion of one side of the cooling cylinder (402), a liquid discharge pipe (405) is fixedly arranged on the inner wall of the bottom of the cooling cylinder (402), a conveying pipe (5) is fixedly arranged on the inner wall of the top of the cooling cylinder (402), and one end of the conveying pipe (5) is fixedly arranged on the inner wall of one side of the upper portion of the desolventizing kettle (1).

5. The desolventizing device for producing waterborne polyurethane emulsion according to claim 1, characterized in that, The upper portions of the plurality of heat exchange pipes (602) are fixedly arranged on the inner wall of the bottom of the flow guide cover (601), and the lower portions of the plurality of heat exchange pipes (602) are fixedly arranged on the inner wall of the top of the fixing cover (603).

6. The desolventizing device for producing waterborne polyurethane emulsion according to claim 1, characterized in that, A flange is fixedly arranged on the outer wall of one end of the mounting pipe (701), a connecting pipe is screwed on the inner wall of the air inlet end of the vacuum pump (8), and the connecting pipe is connected to the outer wall of one end of the mounting pipe (701) through the flange.

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