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CN-224208026-U - Polyester polyol reaction kettle

CN224208026UCN 224208026 UCN224208026 UCN 224208026UCN-224208026-U

Abstract

The utility model belongs to the technical field of chemical reaction containers, and particularly relates to a polyester polyol reaction kettle which comprises a hollow kettle body, a stirring device and a water cooling device. The stirring device comprises a motor, a rotating shaft, a connecting ring and paddles, wherein the driving end of the motor is connected with one end of the rotating shaft, the other end of the rotating shaft stretches into the kettle body, and the connecting ring is sleeved on the rotating shaft and synchronously rotates with the rotating shaft. Swing arms which are uniformly distributed are arranged on the periphery of the connecting ring. Each group of paddles comprises U-shaped guide vane wheels which are symmetrical up and down. The open end of the U-shaped impeller faces the rotation direction of the blade. The periphery of the kettle body is provided with a jacket layer, and a water cooling device is arranged in the jacket layer and used for cooling the kettle body. Through the up-down symmetrical layout of the U-shaped guide vane wheel, the bidirectional guide effect can be formed by utilizing the design that the opening end faces the rotation direction, the vortex on the back of the vane can be reduced, the radial mixing efficiency of materials in the kettle is obviously enhanced, the flowing dead angle is reduced, and the uniformity of the esterification reaction is improved.

Inventors

  • MIAO YONGJIAN
  • LENG XIANYONG

Assignees

  • 广东舜天新材料有限公司

Dates

Publication Date
20260508
Application Date
20250524

Claims (7)

  1. 1. A polyester polyol reaction kettle is characterized by comprising a hollow kettle body, a stirring device and a water cooling device, wherein a feed inlet and a discharge outlet are formed in the upper end of the kettle body, the stirring device comprises a motor, a rotating shaft, a connecting ring and paddles, the motor is arranged at the upper end of the kettle body, the driving end of the motor is connected with one end of the rotating shaft, the other end of the rotating shaft stretches into the kettle body, the connecting ring is sleeved on the rotating shaft and synchronously rotates with the rotating shaft, swing arms which are uniformly distributed are arranged on the periphery of the connecting ring, the paddles are connected to the outer sides corresponding to the swing arms, each group of paddles comprise U-shaped guide impellers which are arranged symmetrically up and down, the opening ends of the U-shaped guide impellers face the rotating directions of the paddles, jacket layers are arranged on the periphery of the kettle body, and the water cooling device is arranged in the jacket layers and used for cooling the kettle body.
  2. 2. The polyester polyol reactor according to claim 1, wherein the edge side of the U-shaped impeller is a toothed edge.
  3. 3. The polyester polyol reaction kettle according to claim 2, wherein a reinforcing rib is further arranged in the opening direction of the U-shaped flow guide impeller, and extends towards the radial cambered surface of the U-shaped flow guide impeller.
  4. 4. The polyester polyol reaction kettle according to claim 1, wherein one end of the U-shaped guide vane close to the kettle body is connected with the swing arm, and the other end of the U-shaped guide vane is suspended, so that a gap exists between the two U-shaped guide vanes.
  5. 5. The polyester polyol reaction kettle according to claim 1, wherein the water cooling device comprises a condensing tube assembly, a water inlet tube and a water outlet tube, a water injection cavity is formed in the jacket layer, the water inlet tube is arranged at the top of the jacket layer and extends into the water injection cavity, and the water outlet tube is arranged at the bottom of the jacket layer and extends into the water injection cavity.
  6. 6. The polyester polyol reactor according to claim 5, wherein the condenser tube assembly is fixed in the jacket layer, one end of the water inlet pipe entering the water injection cavity is communicated with the condenser tube assembly, and the other end of the condenser tube assembly is positioned in the water injection cavity.
  7. 7. The polyester polyol reaction kettle according to claim 1, wherein the adapter ring is formed by locking and connecting a first ring and a second ring, inner tooth wheel grooves are formed in the inner side walls of the first ring and the second ring, outer tooth wheel grooves are formed in the outer side walls of the rotating shaft, and the two are engaged and locked.

Description

Polyester polyol reaction kettle Technical Field The utility model belongs to the technical field of chemical reaction containers, and particularly relates to a polyester polyol reaction kettle. Background In the preparation process of polyester polyol, the common reaction kettle has the problems of low stirring efficiency, insufficient heat transfer, escape of unreacted materials and the like, for example, the conventional stirring device adopts a single-direction blade design, so that the reaction materials are unevenly mixed and are easy to generate flowing dead angles to influence the esterification reaction efficiency, and meanwhile, the conventional jacket type water cooling structure is in direct contact with the outer wall of the kettle body, so that the internal and external heat exchange contact area is limited due to the cylindrical structure of the reaction kettle, and the rapid cooling is difficult to realize. Disclosure of utility model The utility model aims to provide a polyester polyol reaction kettle, and aims to solve the technical problem of uneven mixing of reaction materials in the prior art. In order to achieve the above purpose, the embodiment of the utility model provides a polyester polyol reaction kettle, which comprises a hollow kettle body, a stirring device and a water cooling device. The upper end of the kettle body is provided with a feed inlet and a discharge outlet, the stirring device comprises a motor, a rotating shaft, a connecting ring and paddles, the motor is arranged at the upper end of the kettle body, the driving end of the motor is connected with one end of the rotating shaft, the other end of the rotating shaft extends into the kettle body, and the connecting ring is sleeved on the rotating shaft and synchronously rotates with the rotating shaft. The periphery of the linking ring is provided with swing arms which are uniformly distributed, and the paddles are connected to the outer sides of the corresponding swing arms. Each group of paddles comprises U-shaped guide vane wheels which are arranged on the swing arm in an up-down symmetrical way. The open end of the U-shaped impeller faces the rotation direction of the blade. The periphery of the kettle body is provided with a jacket layer, and a water cooling device is arranged in the jacket layer and used for cooling the kettle body. Further, the edge side of the U-shaped impeller is a toothed edge. Further, a reinforcing rib is further arranged in the opening direction of the U-shaped guide vane wheel, and extends towards the radial cambered surface of the U-shaped guide vane wheel. Further, one end of the U-shaped flow guide impeller close to the kettle body is connected with the swing arm, the other end is suspended in the air, so that a gap exists between the two U-shaped guide vane wheels. Further, the water cooling device comprises a condensing tube component, a water inlet pipe and a water outlet pipe, a water injection cavity is formed in the jacket layer, the water inlet pipe is arranged at the top of the jacket layer and stretches into the water injection cavity, and the water outlet pipe is arranged at the bottom of the jacket layer and stretches out of the water injection cavity. Further, the condenser pipe assembly is fixed in the jacket layer, one end of the water inlet pipe, which enters the water injection cavity, is communicated with the condenser pipe assembly, and the other end of the condenser pipe assembly is positioned in the water injection cavity. The connecting ring is formed by locking and connecting a first ring and a second ring, the inner side walls of the first ring and the second ring are provided with inner gear grooves, the outer side wall of the rotating shaft is provided with outer gear grooves, and the first ring and the second ring are engaged and locked. The one or more technical schemes in the polyester polyol reaction kettle provided by the embodiment of the utility model have at least one of the following technical effects: According to the invention, through the up-down symmetrical layout of the U-shaped flow guide impeller, a bidirectional flow guide effect can be formed by utilizing the design that the opening end of the U-shaped flow guide impeller faces the rotation direction, the vortex on the back of the blade can be reduced, the carrier gas capacity of the stirring device is improved, and the fluid dispersion and mass transfer capacity is improved. The radial mixing efficiency of materials in the kettle is obviously enhanced, the flowing dead angle is reduced, and the uniformity of the esterification reaction is improved. The jacket layer water cooling device is combined with the design of the annular flow channel outside the kettle body, and heat exchange is realized by increasing the contact area of cooling liquid. The overall structure design gives consideration to the requirements of reaction efficiency optimization and energy consumption control. Drawings In or