Polylactic acid devolatilization equipment

Abstract

The utility model discloses polylactic acid devolatilization equipment which comprises an evaporation devolatilization container and an upper cover, lead screws are arranged on the two sides of the evaporation devolatilization container through supporting seats, lifting supports are arranged on the two sides of the upper cover through supporting plates, the lifting supports are in threaded connection with the lead screws, and a stirring shaft is rotationally arranged in the middle of the interior of the upper cover. A plurality of stirring blades are arranged at the lower end of the stirring shaft through a mounting seat, heating rods are clamped to the outer sides of the stirring blades, one end of the stirring shaft is in transmission connection with a stirring motor through a gear set and the upper rack, and a condenser is arranged on one side of the upper end of the upper cover through a conveying pipe; the stirring shaft and the plurality of stirring blades are rotatably arranged in the upper cover, and the heating rod is clamped on the outer sides of the plurality of stirring blades, so that the heating rod can be horizontally rotated and adjusted along with the plurality of stirring blades, the horizontal rotation heating treatment of the heating rod is realized, and the heating uniformity can be improved; therefore, the heating devolatilization efficiency of the polylactic acid is conveniently improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a devolatilization equipment technical field, concretely a kind of polylactic acid devolatilization equipment. BACKGROUND

[0002] Polylactic acid, also known as polylactide, is a polyester polymer obtained by polymerization of lactic acid as the main raw material, and is a new type of biodegradable material. Polylactic acid has good thermal stability, with a processing temperature of 170-230°C, good solvent resistance, and can be processed in various ways, such as extrusion, spinning, biaxial stretching, injection blow molding. Products made of polylactic acid have good biocompatibility, gloss, transparency, hand feeling and heat resistance in addition to biodegradability. Devolatilization equipment is needed during polylactic acid production.

[0003] In the prior art, the application number of a kind of levorotatory polylactic acid devolatilization device is 202420225804.0, it relates to levorotatory polylactic acid devolatilization technical field, including heating box, fixedly installed between the inner surface wall of heating box layer board, fixedly installed between the inner surface wall of layer board evaporation container, the inner wall bottom of heating box is fixedly installed with drive motor, the top of drive motor is fixedly installed with driving rod, the outer surface wall of driving rod is fixedly sleeved with driving gear, the inner wall bottom of heating box is fixedly installed with rotating column, the outer surface wall of driving gear is meshed with driven gear. In the utility model, start drive motor, drive motor drives driving rod and driving gear to rotate, so that the two heaters on the driven gear can uniformly heat the bottom of the evaporation container until the boiling point of the volatile component is reached. The uneven heating of some volatile components will not cause insufficient volatilization, thereby improving the use effect of the levorotatory polylactic acid devolatilization device. However, it is not convenient to adjust the use height of stirring blade and heating rod, it is difficult to meet the heating use of heating rod of different height, thereby affecting the efficiency of polylactic acid heating devolatilization. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of polylactic acid devolatilization equipment to solve the problem of not being convenient to adjust the use height of stirring blade and heating rod in prior art, it is difficult to meet the heating use of heating rod of different height, thereby affecting the efficiency of polylactic acid heating devolatilization.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of polylactic acid devolatilization equipment, including evaporation devolatilization container and upper cover, the evaporation devolatilization container two sides are equipped with lead screw through support base, the upper cover two sides are equipped with lifting support through support plate, and lifting support is screw-connected with lead screw, the upper cover is rotatably equipped with stirring shaft in middle part, the lower end of stirring shaft is equipped with multiple stirring blades through mounting seat, and the outer side of multiple stirring blades is clamped with heating rod, the one end of stirring shaft is drivingly connected with stirring motor through gear set and upper rack, the upper end of upper cover is equipped with condenser through feed pipe.

[0006] Further, the support seat comprises a bottom plate and an upper plate arranged on the outer wall of the evaporation and devolatilization container, and the bottom plate and the upper plate are arranged in parallel.

[0007] Further, the upper plate is an I-shaped plate, and the lifting support is slidingly arranged in a sliding groove in the inner wall of the upper plate.

[0008] Further, the lead screw comprises a lead screw rotatably arranged between the bottom plate and the upper plate, one end of the lead screw is drivingly connected with a servo motor, and the lower end of the lifting support is threadedly connected with the lead screw.

[0009] Further, the upper end of the upper cover is further provided with a feeding port, one side of the bottom of the evaporation and devolatilization container is provided with a discharging port, and valves are arranged on the feeding port, the feeding pipe and the discharging port.

[0010] Further, the heating rod comprises a first heating rod and a second heating rod, and the two first heating rods are fixedly connected through a plurality of second heating rods.

[0011] Further, the first heating rod is in an annular structure, and two first heating rods are arranged in parallel.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1、 the utility model discloses a plurality of stirring blades are arranged in the upper cover, and the outer side of the plurality of stirring blades is clamped with a heating rod, one end of the stirring shaft is drivingly connected with a stirring motor through a gear set and the upper rack, the heating rod can be adjusted by rotating horizontally with the plurality of stirring blades, so that the horizontal rotation heating treatment of the heating rod is realized, the uniformity of heating can be improved, and the efficiency of polylactic acid heating devolatilization is improved.

[0014] 2、 the utility model further comprises a lead screw arranged on the both sides of the evaporation and devolatilization container through the support seat, a lifting support arranged on the both sides of the upper cover through the support plate, and the lifting support is threadedly connected with the lead screw, so that the lifting support and the upper cover are adjusted by driving the lead screw, the use height of the stirring blade and the heating rod can be adjusted, the heating treatment of the heating rod of different heights is satisfied, the efficiency of polylactic acid heating devolatilization is further improved, and the stirring blade and the heating rod are driven to move upwards out of the evaporation and devolatilization container by the lead screw, so that the stirring blade and the heating rod can be cleaned and maintained.

[0015] 3. The utility model discloses a first heating rod and second heating rod are equipped with, and two first heating rods are fixed between through a plurality of second heating rods, first heating rod is annular structure, and two are equipped with in the upper and lower parallel of first heating rod, a plurality of second heating rods are longitudinally arranged between first heating rod, make convenient for the even distribution of heating rod in evaporative devolatilization container inside, convenient further improve the uniformity of heating. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and are used to explain the present application, but do not constitute a limitation on the present application. In the drawings:

[0017] Figure 1 It is the first view angle structure schematic diagram of the utility model;

[0018] Figure 2 It is the second view angle structure schematic diagram of the utility model;

[0019] Figure 3 It is the stirring blade and heating rod connecting structure schematic diagram of the utility model.

[0020] In the drawing: 1, evaporative devolatilization container, 2, upper cover, 3, feed pipe, 4, condenser, 5, feed inlet, 6, valve, 7, upper rack, 8, stirring shaft, 9, mounting seat, 10, bottom plate, 11, screw rod, 12, upper support plate, 13, support plate, 14, lifting support, 15, servo motor, 16, gear set, 17, stirring motor, 18, stirring blade, 19, first heating rod, 20, second heating rod. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0022] Please refer to Figure 1 , Figure 2 , Figure 3The utility model discloses an equipment for the evaporation and devolatilization of polylactic acid, which comprises an evaporation and devolatilization container 1 and an upper cover 2, a screw rod is arranged on both sides of the evaporation and devolatilization container 1 through a support seat, a lifting support 14 is arranged on both sides of the upper cover 2 through a support plate 13, the lifting support 14 is threadedly connected with the screw rod, a feeding port 5 is further arranged on the upper end of the upper cover 2, a discharge port is arranged on one side of the bottom of the evaporation and devolatilization container 1, a valve 6 is arranged on the feeding port 5, the discharge port and a conveying pipe 3, a stirring shaft 8 is rotatably arranged in the middle of the upper cover 2, a plurality of stirring blades 18 are arranged on the lower end of the stirring shaft 8 through a mounting seat 9, a heating rod is clamped on the outer side of the plurality of stirring blades 18, a stirring motor 17 is drivingly connected with the stirring shaft 8 and the stirring blades 18 through a gear set 16 and an upper rack 7 at one end of the stirring shaft 8, a condenser 4 is arranged on one side of the upper end of the upper cover 2 through the conveying pipe 3, the stirring shaft 8 and the stirring blades 18 are uniformly rotated and adjusted by the stirring motor 17 and the gear set 16, the material in the evaporation and devolatilization container 1 can be stirred and treated, the heating rod is used for heating and devolatilization, the heating rod can be horizontally rotated and adjusted with the plurality of stirring blades 18, the rotation angle is within 360° and the heating rod is reversely rotated reciprocatingly, so that the horizontal rotation and heating treatment of the heating rod are realized, the uniformity of heating is improved, and the efficiency of the heating and devolatilization of polylactic acid is improved.

[0023] As Figure 1 and Figure 2 shown, in order to improve the stability of the lifting adjustment of the upper cover 2 and the stirring blades 18, the support seat comprises a bottom plate 10 and an upper plate 12 arranged on the outer wall of the evaporation and devolatilization container 1, the bottom plate 10 and the upper plate 12 are arranged in parallel, the upper plate 12 is an I-shaped plate, the lifting support 14 is slidingly arranged in the sliding groove in the inner wall of the upper plate 12, and the lifting support 14 is slidingly guided during the lifting adjustment, so that the stability of the lifting adjustment of the upper cover 2 and the stirring blades 18 is improved.

[0024] As Figure 1 and Figure 2 shown, in order to meet the heating and stirring use of the heating rods of different heights, the screw rod comprises a screw rod 11 rotatably arranged between the bottom plate 10 and the upper plate 12, one end of the screw rod 11 is drivingly connected with a servo motor 15, and the lower end of the lifting support 14 is threadedly connected with the screw rod 11, so that the lifting adjustment of the lifting support 14 and the upper cover 2 is driven by the screw rod, the use height of the stirring blades 18 and the heating rods can be adjusted, the heating and stirring use of the heating rods of different heights are met, the efficiency of the heating and devolatilization of polylactic acid is further improved, the stirring blades 18 and the heating rods are driven by the screw rod to move out of the evaporation and devolatilization container 1, and the cleaning and maintenance of the stirring blades 18 and the heating rods are facilitated.

[0025] As Figure 1 and Figure 3As shown, in order to further improve the uniformity of heating rod heating, the heating rod also includes the first heating rod 19 and the second heating rod 20, and the two first heating rods 19 are connected and fixed by a plurality of second heating rods 20, the first heating rod 19 is annular structure, and two first heating rods 19 are arranged in parallel on the first heating rod 19, and a plurality of second heating rods 20 are longitudinally arranged between the first heating rods 19, so that the heating rods are uniformly distributed in the evaporation and devolatilization container 1, and the uniformity of heating is further improved.

[0026] The working principle and use process of the utility model are as follows: when used, the material for producing polylactic acid is put into the evaporation and devolatilization container 1, the stirring shaft 8 and the stirring blade 18 are uniformly rotated and adjusted by the stirring motor 17 and the gear set 16, the material in the evaporation and devolatilization container 1 can be stirred and treated, and the devolatilization material is condensed in the condenser 4 by the heating rod, the heating rod can rotate horizontally with the plurality of stirring blades 18, and rotates reciprocatingly in 360°, so that the horizontal rotation heating treatment of the heating rod is realized, the uniformity of heating is improved, and the efficiency of polylactic acid heating and devolatilization is improved.

[0027] Finally, it should be noted that: the above only for preferred embodiments of the utility model have described, and not for limiting the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing embodiments, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A polylactic acid devolatilization apparatus comprising an evaporation devolatilization vessel (1) and an upper cover (2), characterized by: The evaporation devolatilization container (1) is provided with lead screws on both sides through support seats, the upper cover (2) is provided with lifting supports (14) on both sides through support plates (13), and the lifting supports (14) are threadedly connected with the lead screws, a stirring shaft (8) is rotatably arranged in the middle of the upper cover (2), a plurality of stirring blades (18) are arranged on the lower end of the stirring shaft (8) through mounting seats (9), heating rods are clamped on the outer sides of the plurality of stirring blades (18), a stirring motor (17) is drivingly connected with one end of the stirring shaft (8) through a gear set (16), and a condenser (4) is arranged on one side of the upper end of the upper cover (2) through a material conveying pipe (3).

2. The polylactic acid devolatilization apparatus according to claim 1, characterized by: The support seat comprises a bottom plate (10) and an upper plate (12) arranged on the outer wall of the evaporation devolatilization container (1), and the bottom plate (10) and the upper plate (12) are arranged in parallel.

3. The polylactic acid devolatilization apparatus according to claim 2, characterized by: The upper plate (12) is an I-shaped plate, and the lifting supports (14) are slidingly arranged in the sliding grooves in the inner walls of the upper plate (12).

4. The polylactic acid devolatilization apparatus according to claim 2, characterized by: The lead screw comprises a lead screw (11) rotatably arranged between the bottom plate (10) and the upper plate (12), and one end of the lead screw (11) is drivingly connected with a servo motor (15), and the lower end of the lifting support (14) is threadedly connected with the lead screw (11).

5. The polylactic acid devolatilization apparatus according to claim 1, characterized by: The upper end of the upper cover (2) is further provided with a feeding port (5), one side of the bottom of the evaporation devolatilization container (1) is provided with a discharging port, and valves (6) are arranged on the feeding port (5), the material conveying pipe (3) and the discharging port.

6. The polylactic acid devolatilization apparatus according to claim 1, characterized by: The heating rod comprises first heating rods (19) and second heating rods (20), and the two first heating rods (19) are fixedly connected through a plurality of second heating rods (20).

7. The polylactic acid devolatilization apparatus according to claim 6, characterized by: The first heating rod (19) is in an annular structure, and two first heating rods (19) are arranged in parallel on the first heating rod (19), and the plurality of second heating rods (20) are longitudinally arranged between the first heating rods (19).

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