Polyester polyol synthesizer

Abstract

The utility model discloses a polyester polyol synthesis device which is characterized by comprising a reaction kettle, a reaction kettle, a reaction kettle cover, a reaction kettle cover and a reaction kettle cover, and is characterized in that the reaction kettle is used for esterification reaction; a gas-phase pipeline and a liquid-phase pipeline are arranged above the reaction kettle, and the outlet end of the gas-phase pipeline is connected with a gas-phase inlet of a water distribution tower through a first tee joint; the outlet end of the liquid phase pipeline is connected with a liquid phase inlet of a water distribution tower; an outlet of the water distribution tower is provided with a condensation pipeline through a second tee joint, and the outlet end of the condensation pipeline is connected with a liquid inlet of the condenser; a liquid outlet of the condenser is connected with an inlet of the storage tank through a liquid outlet pipeline; a vacuum pipeline is connected to the first tee joint, and the other end of the vacuum pipeline is connected to the liquid outlet pipeline through a third tee joint; the second tee joint is connected with a shunting branch pipeline, and the other end of the shunting branch pipeline is connected to the gas phase pipeline through a fourth tee joint.

Description

Technical Field

[0001] The utility model relates to the field of polyester synthesis, in particular to a polyester polyol synthesis device. Background Art

[0002] In the existing technology, the gas phase in the polyester synthesis process passes through a water separation tower to remove the water vapor and the alcohol is cooled and returned to the kettle. The water vapor is then cooled through a condenser and returned to a water storage tank. The condensation process mainly discharges small molecule polyols.

[0003] However, small molecule polyester polyols can easily return to the reactor during discharge, affecting the reaction efficiency. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the purpose of the present invention is to provide a polyester polyol synthesis device. Through a more rational structural design, the small molecule alcohols in the polyester polyol synthesis process can be smoothly discharged.

[0005] In order to achieve the purpose of this utility model, the technical solution adopted is:

[0006] A polyester polyol synthesis device, comprising:

[0007] a reactor for performing an esterification reaction;

[0008] A gas phase pipeline and a liquid phase pipeline are provided above the reactor, and the outlet end of the gas phase pipeline is connected to the gas phase inlet of the water diversion tower through a first tee;

[0009] The outlet end of the liquid phase pipeline is connected to the liquid phase inlet of the water diversion tower;

[0010] The outlet of the water diversion tower is provided with a condensation pipeline through a second tee, and the outlet end of the condensation pipeline is connected to the liquid inlet of the condenser;

[0011] The liquid outlet of the condenser is connected to the inlet of the storage tank through a liquid outlet pipeline;

[0012] A vacuum pipeline is connected to the first tee, and the other end of the vacuum pipeline is connected to the liquid outlet pipeline through a third tee;

[0013] A branch pipeline is connected to the second three-way connection, and the other end of the branch pipeline is connected to the gas phase pipeline through a fourth three-way connection.

[0014] In a preferred embodiment of the present invention, a vacuum pump is provided near the vacuum pipeline in the storage tank.

[0015] In a preferred embodiment of the present invention, a first regulating valve is provided on the gas phase pipeline.

[0016] In a preferred embodiment of the present invention, a second regulating valve is provided on the condensation pipeline.

[0017] In a preferred embodiment of the present invention, a third regulating valve is provided on the vacuum pipeline.

[0018] In a preferred embodiment of the present invention, a fourth regulating valve is provided on the diversion branch line.

[0019] The beneficial effects of the present invention are:

[0020] The polyester polyol synthesis device of the utility model realizes the smooth discharge of small molecule alcohols in the polyester polyol synthesis process through a more rational structural design. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the present utility model. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. However, it should be understood that the specific embodiments described herein are intended solely to illustrate the present invention and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following descriptions to avoid unnecessary confusion regarding the concepts of the present invention.

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," and "top / bottom" are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific manner, and are not to be construed as limitations of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] like Figure 1 The polyester polyol synthesis device shown includes a reactor 100 for performing esterification reaction. The present invention adopts a conventional commercial reactor that can perform material addition and discharge.

[0025] A gas phase pipeline 110 and a liquid phase pipeline 120 are provided above the reactor 100 . The outlet end of the gas phase pipeline 110 is connected to the gas phase inlet 201 of the water separation tower 200 through a first tee 111 . The gas components produced by the esterification reaction enter the gas phase inlet 201 .

[0026] The outlet end of the liquid phase pipeline 120 is connected to the liquid phase inlet 202 of the water diversion tower 200. The outlet of the water diversion tower 200 is provided with a condensation pipeline 210 through a second three-way valve 211. The outlet end of the condensation pipeline 210 is connected to the liquid inlet 301 of the condenser 300, and the substance to be condensed enters the condenser 300.

[0027] The liquid outlet of the condenser 300 is connected to the inlet of the storage tank 400 through the liquid outlet pipeline 310;

[0028] Small molecule polyester polyols can easily flow back into the reactor during discharge, impacting reaction efficiency. Therefore, a vacuum line 130 is connected to the first tee 111. The other end of the vacuum line 130 is connected to the liquid outlet line 310 via a third tee 131. This allows the small molecule polyester polyols, which are difficult to process through the water diversion tower 200, to be discharged by vacuuming the vacuum line 130. A vacuum pump is installed near the vacuum line 130 in the storage tank 400 to adjust the vacuum level of the vacuum line 130.

[0029] The second three-way valve 211 is connected to a branch pipe 220, and the other end of the branch pipe 220 is connected to the gas phase pipe 110 through a fourth three-way valve 221. The gas phase pipe 110 is provided with a first regulating valve 1101.

[0030] The condensation line 210 is provided with a second regulating valve 2101 , the vacuum line 130 is provided with a third regulating valve 1301 , and the branch line 220 is provided with a fourth regulating valve 2201 .

[0031] Specifically, each pipeline can be regulated and selected according to the molecular weight of the small molecule polyester polyol to change the route of the small molecule polyester polyol.

[0032] The basic principles and main features of the utility model and the advantages of the utility model are shown and described above.

[0033] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention shall be defined by the attached claims and their equivalents.

Claims

1. A polyester polyol synthesis device, characterized in that, include: a reactor for performing an esterification reaction; A gas phase pipeline and a liquid phase pipeline are provided above the reactor, and the outlet end of the gas phase pipeline is connected to the gas phase inlet of the water diversion tower through a first tee; The outlet end of the liquid phase pipeline is connected to the liquid phase inlet of the water diversion tower; The outlet of the water diversion tower is provided with a condensation pipeline through a second tee, and the outlet end of the condensation pipeline is connected to the liquid inlet of the condenser; The liquid outlet of the condenser is connected to the inlet of the storage tank through a liquid outlet pipeline; A vacuum pipeline is connected to the first tee, and the other end of the vacuum pipeline is connected to the liquid outlet pipeline through a third tee; A branch pipeline is connected to the second three-way connection, and the other end of the branch pipeline is connected to the gas phase pipeline through a fourth three-way connection.

2. A polyester polyol synthesis device according to claim 1, characterized in that: A vacuum pump is provided near the vacuum pipeline in the storage tank.

3. A polyester polyol synthesis device according to claim 1, characterized in that: The gas phase pipeline is provided with a first regulating valve.

4. A polyester polyol synthesis device according to claim 1, characterized in that: A second regulating valve is provided on the condensation pipeline.

5. A polyester polyol synthesis device according to claim 1, characterized in that: A third regulating valve is provided on the vacuum pipeline.

6. A polyester polyol synthesis device according to claim 1, characterized in that: A fourth regulating valve is provided on the diversion branch pipeline.

Images