Esterification reaction kettle for preparing polyol ester

Abstract

The utility model discloses an esterification reaction kettle for preparing polyol ester, and belongs to the technical field of reaction kettles for preparing polyol ester. The esterification reaction kettle for polyol ester preparation comprises a reaction kettle body, a motor is arranged at the top of the reaction kettle body, a rotating rod is arranged in the reaction kettle body, the top of the rotating rod penetrates through the surface of the top of the reaction kettle body, and a cleaning device is arranged on the surface of the rotating rod and comprises a bearing sleeve. The inner wall of the bearing sleeve is fixedly connected to the surface of the rotating rod, and the surface of the side, away from the bearing sleeve, of the hollow pulley is fixedly connected with a hollow pipe. The air bag is driven by the pneumatic cylinder to expand, the sealing plate is pushed to push the brush to be flush with the inner wall of the reaction kettle, meanwhile, the supporting rod at the rear end of the brush is pushed to be inserted into the groove, and the rotating rod is rotated at a low speed to drive the bearing sleeve to drive the brush to scrape the reaction kettle. The effect of cleaning the alcohol ester adhered to the inner wall of the reaction kettle is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of alcohol ester preparation reaction kettles, in particular to an esterification reaction kettle for preparing polyol esters. Background Art

[0002] The broad understanding of the reactor is a stainless steel container for physical or chemical reactions. The structural design and parameters of the container are carried out according to different process conditions. The configuration of the reactor, the design conditions, process, inspection, manufacturing and acceptance must be based on relevant technical standards to achieve the heating, evaporation, cooling and low-speed mixing reaction functions required by the process. In the preparation process of benzyl acetate, the pre-esterification reactor is one of the most important reaction links.

[0003] According to a disclosed reactor for preparing mixed polyether polyols (publication number: CN 211026288U), it includes a lower threaded stirring box device and a stirring rod, the lower threaded stirring box device includes a discharge hole, a lower stirring box and a No. 2 external threaded connecting column, and a discharge hole is arranged at the middle inner position of the lower end of the lower stirring box, and the reactor body is transformed into two parts, an upper threaded stirring box device and a lower threaded stirring box device. When the equipment is used for a long time, the staff must perform cleaning work regularly. At this time, by disassembling the upper threaded stirring box device and the lower threaded stirring box device, the upper threaded stirring box device and the lower threaded stirring box device can be separated, so that the staff can perform cleaning work conveniently, so that the inner wall of the upper threaded stirring box device and the inner wall of the lower threaded stirring box device can be cleaned, thereby improving the cleaning efficiency. In the above application document, when cleaning the inside of the reactor, manual cleaning is required, which is inconvenient for the staff to operate, thereby affecting the working efficiency of the entire device, and thus greatly reducing the overall practicality of the device. Utility Model Content

[0004] In order to solve the problem of inconvenient cleaning of the reactor in the prior art, the utility model provides an esterification reactor for preparing polyol esters, which can be equipped with a hidden brush for scraping at low speed and does not affect the work of the equipment at high speed.

[0005] An esterification reaction kettle for preparing polyol esters, comprising a reaction kettle, a motor is arranged on the top of the reaction kettle, a rotating rod is arranged inside the reaction kettle, the top of the rotating rod penetrates the top surface of the reaction kettle and is arranged on the bottom surface of the motor, and a baffle is fixedly connected to the surface of the rotating rod;

[0006] A cleaning device is provided on the surface of the rotating rod, and the cleaning device includes a bearing sleeve, the inner wall of the bearing sleeve is fixedly connected to the surface of the rotating rod, the inner wall of the bearing sleeve is slidably connected to a hollow pulley, the surface of the hollow pulley on the side away from the bearing sleeve is fixedly connected to a hollow tube, the inside of the hollow tube is slidably connected to a support rod, the surface of the support rod on the side away from the hollow pulley is fixedly connected to a brush, a sealing plate is provided on the surface of the brush on the side away from the support rod, an airbag is provided on the surface of the sealing plate on the side away from the brush, and a pneumatic cylinder is provided on the surface of the airbag on the side away from the sealing plate.

[0007] Furthermore, an auxiliary cleaning device is provided at the inner bottom of the reactor, and the auxiliary cleaning device includes a round rod, the top of the round rod is fixedly connected to the bottom surface of the rotating rod, the bottom surface of the round rod is fixedly connected to the pipe, both ends of the pipe are rotatably connected to pulleys, the surface of the pulley is slidably connected to a slide groove, the surface of the slide groove is opened on the inner surface of the bottom of the reactor, and the surface of the pipe is fixedly connected to a scraper.

[0008] Furthermore, a square groove is provided on the inner wall of the reactor, and the sealing plate, airbag and brush are all arranged on the inner wall of the square groove. The brush is arranged on the inner wall of the square groove, which can fill the gap and enhance the sealing force. The soft and fine bristles of the brush can adapt to different surface shapes, effectively fill the gap between the square groove and the sealing plate, and improve the sealing effect.

[0009] Furthermore, a groove is provided on the inner wall of the bearing sleeve, and the surface of the support rod is directly smaller than the inner diameter of the groove. Through the direct contact between the support rod and the groove, the contact area is larger, which can increase the friction and wear between the support rod and the groove. The presence of the groove can guide the support rod well when it slides and drive it to move.

[0010] Furthermore, the surface of the pneumatic cylinder is fixedly connected to the outer surface of the reactor. The pneumatic cylinder is a device that generates driving force by inflating and releasing air pressure. The stability of the airbag in the reactor can be ensured, thereby ensuring the consistent and controllable driving force required in the cleaning process of polyol esters.

[0011] Furthermore, the scraper is wavy as a whole and is made of soft rubber material. The softness of the scraper effectively reduces the friction and wear on the inner wall of the reactor, prevents scratches and damage caused by the friction between the scraper and the inner wall of the reactor, and extends the service life of the equipment.

[0012] The difference from the prior art is that the beneficial effects of this application are:

[0013] (1) The esterification reactor for preparing polyol esters uses a pneumatic cylinder to drive the airbag to expand, push the sealing plate to push the brush to be flush with the inner wall of the reactor, and at the same time push the support rod at the rear end to insert it into the groove. The bearing sleeve drives the brush to scrape the reactor by using a low-speed rotating rod to achieve the effect of cleaning the alcohol esters stuck on the inner wall of the reactor.

[0014] (2) The esterification reactor for preparing polyol esters uses a rotating rod to drive the round rod to rotate the bottom pipe 601 inside the bottom of the reactor, and pulleys are used on both sides to relay the rotation, so as to achieve the effect of helping the alcohol esters at the bottom of the equipment to be stirred and flow out in an orderly manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0016] Figure 1 It is a schematic diagram of the three-dimensional first-view structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the three-dimensional cross-section structure of the utility model from the first viewing angle;

[0018] Figure 3 This is a schematic diagram of the structure of the three-dimensional cleaning device of the utility model from a first viewing angle;

[0019] Figure 4 This is an enlarged structural schematic diagram of the three-dimensional cleaning device of the utility model at the first viewing angle A;

[0020] Figure 5 It is a schematic diagram of the three-dimensional cross-sectional structure of the utility model from a second viewing angle.

[0021] Figure 6 It is a schematic structural diagram of a three-dimensional auxiliary cleaning device of the utility model in a cross-sectional view from a first viewing angle.

[0022] In the figure:

[0023] 100, reactor; 200, motor; 300, rotating rod; 400, baffle;

[0024] 500, cleaning device; 501, bearing sleeve; 502, groove; 503, hollow pulley; 504, support rod; 505, brush; 506, square groove; 507, sealing plate; 508, air bag; 509, pneumatic cylinder; 510, hollow tube;

[0025] 600, auxiliary cleaning device; 601, pipe; 602, scraper; 603, pulley; 604, chute; 605, round rod. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application are described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0028] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0029] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0030] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] Embodiment 1

[0033] See also Figure 1-Figure 6 As shown in the figure, an esterification reactor for preparing polyol esters includes a reactor 100, a motor 200 is arranged on the top of the reactor 100, a rotating rod 300 is arranged inside the reactor 100, the top of the rotating rod 300 penetrates the top surface of the reactor 100, and is arranged on the bottom surface of the motor 200, a square groove 506 is opened on the inner wall of the reactor 100, a sealing plate 507, an air bag 508, and a brush 505 are all arranged on the inner wall of the square groove 506, and the brush 505 is arranged on the inner wall of the square groove 506, which can fill the gap and enhance the sealing force. The soft and dense bristles of the brush 505 can adapt to different surface morphologies, effectively fill the gap between the square groove 506 and the sealing plate 507, and improve the sealing effect. The surface of the rotating rod 300 is fixedly connected with a baffle 400;

[0034] First, a cleaning device 500 is provided on the surface of the rotating rod 300. The cleaning device 500 includes a bearing sleeve 501. The inner wall of the bearing sleeve 501 is fixedly connected to the surface of the rotating rod 300. A hollow pulley 503 is slidably connected to the inner wall of the bearing sleeve 501. A groove 502 is provided on the inner wall of the bearing sleeve 501. The surface of the support rod 504 is directly smaller than the inner diameter of the groove 502. Through the direct contact between the support rod 504 and the groove 502, the contact area is large, which can increase the friction and wear between the support rod 504 and the groove 502. The existence of the groove 502 can guide the support rod 504 well when it slides and drive it to move. A hollow tube 510 is fixedly connected to the surface of the hollow pulley 503 on the side away from the bearing sleeve 501. A support rod 504 is slidably connected inside the hollow tube 510, and a brush 505 is fixedly connected to the surface of the support rod 504 on one side away from the hollow pulley 503, and a sealing plate 507 is provided on the surface of the brush 505 on one side away from the support rod 504, and an airbag 508 is provided on the surface of the sealing plate 507 on one side away from the brush 505, and a pneumatic cylinder 509 is provided on the surface of the airbag 508 on one side away from the sealing plate 507, and the surface of the pneumatic cylinder 509 is fixedly connected to the outer surface of the reactor 100. The pneumatic cylinder 509 is a device that generates a driving force by inflating and releasing air pressure, and can ensure the stability of the airbag 508 when the driving force is transmitted to the inside of the reactor 100, thereby ensuring the consistent and controllable driving force required in the cleaning process of polyol esters.

[0035] When in use, first, when the reactor 100 is driven by the motor 200 to rotate the rotating rod 300 inside, the baffle 400 on its surface is used to process the polyol ester inside, and then the polyol ester is discharged through the discharge port at the bottom after completion. Since a large amount of polyol ester will stick to the inner wall of the reactor 100 when it flows out, the pneumatic cylinder 509 is started by the controller, and the airbag 508 is inflated by the pneumatic cylinder 509 to make the airbag 508 swell and expand, and the expansion of the airbag 508 is used to push the sealing plate 507 inside the square groove 506 to move, and at the same time, the surface of the sealing plate 507 is fitted with the inner wall of the reactor 100, and the brush 505 on the surface is pushed out of the square groove 506. It is explained here that when the brush 505 is pushed out of the square groove 506, the support rod 504 connected to the back of the brush 505 slides inside the hollow tube 510, and the other end of the support rod 504 is clamped The motor 200 drives the rotating rod 300 to rotate at a low speed, so that the bearing sleeve 501 drives the support rod 504 and the brush 505 to rotate synchronously, and helps to clean the polyol ester stuck on the inner wall of the reactor 100. When the work is completed, the pneumatic cylinder 509 stops working, and the airbag 508 begins to shrink and tighten. At the same time, the sealing plate 507 on the surface moves synchronously toward the inside of the square groove 506, and the square groove 506 on the inner wall of the reactor 100 will be displayed. When the brush 505 rotates to the top of the square groove 506, it will enter the inside. At the same time, the other end surface of the support rod 504 is separated from the groove 502, and the rotating rod 300 and the bearing sleeve 501 will be idle. At the same time, the hollow pulley 503 drives the hollow tube 510 to be idle in the bearing sleeve 501, and the rear end of the brush 505 remains motionless, which will not affect the normal processing of materials in the reactor 100.

[0036] To assist with cleaning the bottom of the device, please refer to Figure 1-Figure 6 As shown in the figure, an auxiliary cleaning device 600 is provided at the inner bottom of the reactor 100. The auxiliary cleaning device 600 includes a round rod 605. The top of the round rod 605 is fixedly connected to the bottom surface of the rotating rod 300. The bottom surface of the round rod 605 is fixedly connected to the pipe 601. Both ends of the pipe 601 are rotatably connected with pulleys 603. The surface of the pulley 603 is slidably connected with a slide groove 604. The surface of the slide groove 604 is opened on the inner surface of the bottom of the reactor 100. The surface of the pipe 601 is fixedly connected with a scraper 602. The scraper 602 is wavy as a whole and is made of soft rubber. Since the scraper 602 is made of soft rubber, its softness effectively reduces the friction and wear on the inner wall of the reactor 100, and can prevent scratches and damage caused by the friction between the scraper 602 and the inner wall of the reactor 100, thereby extending the service life of the equipment.

[0037] During use, when the interior of the reactor 100 is to be cleaned, the bottom end of the rotating rod 300 is driven to the pipe 601 by the round rod 605, and the pipe 601 is moved inside the slide 604 by the pulleys 603 at both ends, and the two ends are rotated with the pipe 601 as the center. At the same time, the slide 604 is opened inside the bottom side of the reactor 100, and a material blocking cloth is provided on the surface of the opening of the slide 604 to prevent polyol esters from entering the interior of the slide 604. At the same time, a scraper 602 is provided on the surface of the pipe 601 to help to scrape and discharge the polyol esters accumulated at the bottom of the reactor 100 in an orderly manner.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An esterification reaction kettle for preparing polyol esters, comprising a reaction kettle (100), wherein a motor (200) is arranged on the top of the reaction kettle (100), a rotating rod (300) is arranged inside the reaction kettle (100), the top of the rotating rod (300) penetrates the top surface of the reaction kettle (100) and is arranged on the bottom surface of the motor (200), and a baffle (400) is fixedly connected to the surface of the rotating rod (300); Features: The surface of the rotating rod (300) is provided with a cleaning device (500), and the cleaning device (500) comprises a bearing sleeve (501), the inner wall of the bearing sleeve (501) is fixedly connected to the surface of the rotating rod (300), the inner wall of the bearing sleeve (501) is slidably connected to a hollow pulley (503), and the surface of the hollow pulley (503) on one side away from the bearing sleeve (501) is fixedly connected to a hollow tube (510), and the inner wall of the hollow tube (510) is slidably connected to the inner wall of the bearing sleeve (501). A support rod (504) is dynamically connected to the hollow pulley (503); a brush (505) is fixedly connected to the surface of the support rod (504) on one side away from the hollow pulley (503); a sealing plate (507) is provided on the surface of the brush (505) on one side away from the support rod (504); an air bag (508) is provided on the surface of the sealing plate (507) on one side away from the brush (505); and a pneumatic cylinder (509) is provided on the surface of the air bag (508) on one side away from the sealing plate (507).

2. The esterification reaction kettle for preparing polyol esters according to claim 1, characterized in that: The surface of the pneumatic cylinder (509) is fixedly connected to the outer surface of the reaction kettle (100).

3. The esterification reaction kettle for preparing polyol esters according to claim 1, characterized in that: The inner wall of the reaction kettle (100) is provided with a square groove (506), and the sealing plate (507), the air bag (508) and the brush (505) are all arranged on the inner wall of the square groove (506).

4. The esterification reaction kettle for preparing polyol esters according to claim 1, characterized in that: The inner wall of the bearing sleeve (501) is provided with a groove (502), and the surface diameter of the support rod (504) is smaller than the inner diameter of the groove (502).

5. The esterification reaction kettle for preparing polyol esters according to claim 1, characterized in that: An auxiliary cleaning device (600) is provided at the inner bottom of the reactor (100), and the auxiliary cleaning device (600) comprises a round rod (605), the top of which is fixedly connected to the bottom surface of the rotating rod (300), the bottom surface of which is fixedly connected to the pipe (601), both ends of the pipe (601) are rotatably connected to pulleys (603), the surface of which is slidably connected to a slide groove (604), the surface of which is opened on the inner surface of the bottom of the reactor (100), and the surface of the pipe (601) is fixedly connected to a scraper (602).

6. The esterification reaction kettle for preparing polyol esters according to claim 5, characterized in that: The scraper (602) is wavy in shape as a whole and is made of soft rubber material.

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