Polyester polyol reaction device

Abstract

The utility model discloses a polyester polyol reaction device which comprises a reaction kettle, a feeding mechanism, a stirring mechanism and a circulating mechanism, the feeding mechanism is arranged at the upper end of the reaction kettle and comprises a first annular pipe, a plurality of first liquid outlet nozzles are uniformly arranged at the lower end of the first annular pipe, and a plurality of second liquid outlet nozzles are uniformly arranged at the lower end of the first annular pipe. A first feeding pipe is arranged at the right end of the reaction kettle, one end of the first feeding pipe is connected with the right end of the first annular pipe, the other end of the first feeding pipe is connected with a plurality of first raw stock pipes, the other ends of the first raw stock pipes are connected with a first quantitative cylinder, and the stirring mechanism is arranged in the reaction kettle. The circulating mechanism is arranged at the left end of the reaction kettle, and a first discharging pipe is arranged at the lower end of the reaction kettle. According to the polyester polyol reaction device provided by the utility model, raw materials are quantitatively measured by utilizing the first quantitative cylinder, and the raw materials are circularly fed, discharged and mixed by utilizing the circulating mechanism, so that the mixing and stirring efficiency and effect are improved.

Description

Technical Field

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

[0002] Polyester polyols are typically produced by the condensation (or transesterification) of organic dicarboxylic acids (anhydrides or esters) with polyols (including diols), or by the polymerization of lactones with polyols. They are one of the primary raw materials for producing polyester-type polyurethanes. Polyester polyols of various specifications and grades can be produced by reacting with isocyanates to produce various polyurethane products. Existing polyester polyol production processes require a reactor to mix and react the raw materials. However, existing reactors have simple stirring mechanisms, which result in inadequate mixing of the raw materials and low mixing efficiency. Therefore, a polyester polyol reaction unit is needed to ensure sufficient mixing of the raw materials. Summary of the Invention

[0003] In order to solve the deficiencies in the prior art, the utility model provides a polyester polyol reaction device.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A polyester polyol reaction device includes a reactor, a feeding mechanism, a stirring mechanism and a circulation mechanism, wherein the feeding mechanism is arranged at the upper end of the reactor, the feeding mechanism includes a first annular tube, the lower end of the first annular tube is evenly provided with a plurality of first liquid outlet nozzles, the right end of the reactor is provided with a first feeding pipe, one end of the first feeding pipe is connected to the right end of the first annular tube, the other end of the first feeding pipe is connected to a plurality of first raw pulp tubes, the other end of the first raw pulp tube is connected to a first metering cylinder, the first feeding pipe is provided with a first valve, the first raw pulp tube is provided with a second valve, the stirring mechanism is arranged in the reactor, the circulation mechanism is arranged at the left end of the reactor, the lower end of the reactor is provided with a first discharge pipe, and the first discharge pipe is provided with a third valve.

[0006] Furthermore, the stirring mechanism includes a first drive motor and a first stirring shaft, the first drive motor is arranged at the upper end of the reactor, the first stirring shaft is arranged in the reactor, the first drive motor is driven and connected to the first stirring shaft, a plate stirring paddle is provided in the middle of the first stirring shaft, and a frame stirring paddle is provided at the lower end of the first stirring shaft.

[0007] Furthermore, the circulation mechanism includes a first circulation pipe and a first liquid pump, a second feed pipe is provided at the upper end of the reactor, one end of the first circulation pipe is connected to one end of the second feed pipe, the other end of the second feed pipe is connected to the left end of the first annular pipe, a first branch pipe is provided on the first discharge pipe, the other end of the first circulation pipe is connected to the first branch pipe, the first liquid pump is arranged on the first circulation pipe, the first liquid pump corresponds to between the reactor and the third valve, and the first branch pipe corresponds to between the third valve and the first liquid pump.

[0008] Furthermore, the circulation mechanism includes a fourth valve, and the fourth valve is arranged at the upper end of the first circulation pipe.

[0009] Furthermore, the polyester polyol reaction device includes a cleaning mechanism, which includes a first cleaning pipe, a first water pump and a fifth valve. The first water pump is arranged on the first cleaning pipe. A second branch pipe is provided at the upper end of the first circulation pipe. The second branch pipe corresponds to between the fourth valve and the reactor. The first cleaning pipe is connected to the second branch pipe, and the fifth valve is arranged on the second branch pipe.

[0010] Furthermore, a second discharge pipe is provided at the upper end of the first metering cylinder, and the second discharge pipe is connected to the first raw pulp pipe. A first piston is provided in the first metering cylinder, and a first push rod is provided at the lower end of the first piston. A first guide hole is provided at the lower end of the first metering cylinder, and the first guide hole matches the first push rod. A first air cylinder is provided at the lower end of the first metering cylinder, and the first cylinder is connected to the first push rod. A third feed pipe is provided at the upper end of the first metering cylinder, and a first positioning ring and a second positioning ring are provided in the first metering cylinder, and the first positioning ring and the second positioning ring both match the first piston.

[0011] The polyester polyol reaction device disclosed by the utility model has the beneficial effect compared with the existing technology in that it can use the first metering cylinder to quantitatively measure the raw materials, and can use the circulation mechanism to circulate the raw materials for loading and unloading and mixing, so as to achieve sufficient stirring and mixing of the raw materials and improve the mixing efficiency and effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a preferred embodiment provided by the utility model.

[0013] Figure 2 It is a structural schematic diagram of a reactor according to a preferred embodiment of the present invention.

[0014] Figure 3 It is a structural diagram of the feeding mechanism of the preferred embodiment provided by the utility model.

[0015] Figure 4 It is a structural schematic diagram of the first metering cylinder of the preferred embodiment provided by the utility model.

[0016] Reference numerals include: 100, reactor; 110, first feed pipe; 111, first valve; 120, second feed pipe; 130, first discharge pipe; 131, first liquid pump; 132, third valve; 133, first branch pipe; 140, first circulation pipe; 141, fourth valve; 142, fifth valve; 143, second branch pipe; 150, first cleaning pipe; 151, first water pump; 160, first annular pipe; 161, First liquid outlet nozzle; 170, first drive motor; 180, first stirring shaft; 181, plate stirring paddle; 182, frame stirring paddle; 200, first metering cylinder; 210, third feed pipe; 220, second discharge pipe; 230, first piston; 231, first push rod; 240, first guide hole; 251, first positioning ring; 252, second positioning ring; 260, first cylinder; 270, first raw pulp pipe; 271, second valve. DETAILED DESCRIPTION

[0017] The utility model discloses a polyester polyol reaction device. The specific implementation of the utility model is further described below in conjunction with preferred embodiments.

[0018] See attached figure Figure 1-4 , Figure 1 This is a schematic structural diagram of a preferred embodiment provided by the present utility model. Figure 2 This is a schematic structural diagram of a reactor 100 according to a preferred embodiment of the present invention. Figure 3 This is a structural diagram of the feeding mechanism of the preferred embodiment provided by the utility model. Figure 4 It is a structural schematic diagram of the first metering cylinder 200 of the preferred embodiment provided by the present utility model.

[0019] Preferred embodiment.

[0020] This embodiment provides a polyester polyol reaction device, including a reactor 100, a feeding mechanism, a stirring mechanism and a circulation mechanism, wherein the feeding mechanism is arranged at the upper end of the reactor 100, the feeding mechanism includes a first annular tube 160, and the lower end of the first annular tube 160 is evenly provided with a plurality of first liquid outlet nozzles 161, a first feeding pipe 110 is provided at the right end of the reactor 100, one end of the first feeding pipe 110 is connected to the right end of the first annular tube 160, the other end of the first feeding pipe 110 is connected to a plurality of first raw pulp tubes 270, and the other end of the first raw pulp tube 270 is connected to a first metering cylinder 200, a first valve 111 is provided on the first feeding pipe 110, and a second valve 271 is provided on the first raw pulp tube 270, the stirring mechanism is arranged in the reactor 100, the circulation mechanism is arranged at the left end of the reactor 100, a first discharge pipe 130 is provided at the lower end of the reactor 100, and a third valve 132 is provided on the first discharge pipe 130.

[0021] Furthermore, the stirring mechanism includes a first drive motor 170 and a first stirring shaft 180, the first drive motor 170 is arranged at the upper end of the reactor 100, the first stirring shaft 180 is arranged in the reactor 100, the first drive motor 170 is driven and connected to the first stirring shaft 180, a plate stirring paddle 181 is provided in the middle of the first stirring shaft 180, and a frame stirring paddle 182 is provided at the lower end of the first stirring shaft 180.

[0022] Furthermore, the circulation mechanism includes a first circulation pipe 140 and a first liquid pump 131. A second feed pipe 120 is provided at the upper end of the reactor 100. One end of the first circulation pipe 140 is connected to one end of the second feed pipe 120. The other end of the second feed pipe 120 is connected to the left end of the first annular pipe 160. A first branch pipe 133 is provided on the first discharge pipe 130. The other end of the first circulation pipe 140 is connected to the first branch pipe 133. The first liquid pump 131 is arranged on the first circulation pipe 140. The first liquid pump 131 corresponds to between the reactor 100 and the third valve 132. The first branch pipe 133 corresponds to between the third valve 132 and the first liquid pump 131.

[0023] Furthermore, the circulation mechanism includes a fourth valve 141 , and the fourth valve 141 is disposed at the upper end of the first circulation pipe 140 .

[0024] Furthermore, the polyester polyol reaction device includes a cleaning mechanism, which includes a first cleaning pipe 150, a first water pump 151 and a fifth valve 142. The first water pump 151 is arranged on the first cleaning pipe 150. The upper end of the first circulation pipe 140 is provided with a second branch pipe 143. The second branch pipe 143 corresponds to between the fourth valve 141 and the reactor 100. The first cleaning pipe 150 is connected to the second branch pipe 143, and the fifth valve 142 is arranged on the second branch pipe 143.

[0025] Furthermore, a second discharge pipe 220 is provided at the upper end of the first metering cylinder 200, and the second discharge pipe 220 is connected to the first raw pulp pipe 270. A first piston 230 is provided in the first metering cylinder 200, and a first push rod 231 is provided at the lower end of the first piston 230. A first guide hole 240 is provided at the lower end of the first metering cylinder 200, and the first guide hole 240 matches the first push rod 231. A first cylinder 260 is provided at the lower end of the first metering cylinder 200, and the first cylinder 260 is connected to the first push rod 231. A third feed pipe 210 is provided at the upper end of the first metering cylinder 200, and a first positioning ring 251 and a second positioning ring 252 are provided in the first metering cylinder 200, and the first positioning ring 251 and the second positioning ring 252 both match the first piston 230.

[0026] Working principle: Various raw pulps enter the first metering cylinder 200 through the third feeding pipe 210. The first piston 230 moves downward under the pressure of the raw pulp and is displaced from the first positioning ring 251 to the second positioning ring 252, thus completing the accurate measurement of the raw pulp. The first cylinder 260 then pushes the first push rod 231, which is then moved from the second positioning ring 252 to the first positioning ring 251, thus allowing various raw pulps to be quantitatively fed into the reactor 100. The raw pulp passes through the first annular tube 160 and can evenly fall downward from the first liquid outlet 161, facilitating the mixing of the various raw pulps. The first driving motor 170 then drives the first stirring shaft 180 to rotate, causing the plate stirring paddle 181 and the frame stirring paddle 182 to stir and mix the various raw pulps, thereby ensuring the reaction preparation efficiency of the polyester polyol. The mixed liquid is then pumped into the first circulation pipe 140 by the first liquid pump 131 and then re-entered into the reactor 100 through the first annular pipe 160, thereby accelerating the efficiency and effectiveness of its mixing. After the reaction preparation is completed, water is pumped out by the first water pump 151 and the reactor 100 is cleaned through the first annular pipe 160.

[0027] It is worth mentioning that the technical features such as valves involved in this utility model patent application should be regarded as prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected by conventional options in the field, and should not be regarded as the utility model points of this utility model patent. This utility model patent will not be further elaborated.

[0028] For those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. A polyester polyol reaction device, characterized in that, The invention comprises a reactor (100), a feeding mechanism, a stirring mechanism and a circulation mechanism, wherein the feeding mechanism is arranged at the upper end of the reactor (100), the feeding mechanism comprises a first annular tube (160), the lower end of the first annular tube (160) is evenly provided with a plurality of first liquid outlet nozzles (161), the right end of the reactor (100) is provided with a first feeding pipe (110), one end of the first feeding pipe (110) is connected to the right end of the first annular tube (160), and the other end of the first feeding pipe (110) is connected to a plurality of first liquid outlet nozzles (161). A raw pulp pipe (270), the other end of the first raw pulp pipe (270) is connected to a first metering cylinder (200), the first feeding pipe (110) is provided with a first valve (111), the first raw pulp pipe (270) is provided with a second valve (271), the stirring mechanism is arranged in the reactor (100), the circulation mechanism is arranged at the left end of the reactor (100), the lower end of the reactor (100) is provided with a first discharge pipe (130), and the first discharge pipe (130) is provided with a third valve (132).

2. The polyester polyol reaction device according to claim 1, characterized in that The stirring mechanism comprises a first driving motor (170) and a first stirring shaft (180), wherein the first driving motor (170) is arranged at the upper end of the reactor (100), and the first stirring shaft (180) is arranged in the reactor (100), the first driving motor (170) and the first stirring shaft (180) are drivingly connected, a plate-type stirring paddle (181) is provided in the middle of the first stirring shaft (180), and a frame-type stirring paddle (182) is provided at the lower end of the first stirring shaft (180).

3. The polyester polyol reaction device according to claim 2, characterized in that The circulation mechanism includes a first circulation pipe (140) and a first liquid pump (131). A second feed pipe (120) is provided at the upper end of the reactor (100). One end of the first circulation pipe (140) is connected to one end of the second feed pipe (120). The other end of the second feed pipe (120) is connected to the left end of the first annular pipe (160). A first branch pipe (133) is provided on the first discharge pipe (130). The other end of the first circulation pipe (140) is connected to the first branch pipe (133). The first liquid pump (131) is arranged on the first circulation pipe (140). The first liquid pump (131) corresponds to between the reactor (100) and the third valve (132). The first branch pipe (133) corresponds to between the third valve (132) and the first liquid pump (131).

4. The polyester polyol reaction device according to claim 3, characterized in that: The circulation mechanism comprises a fourth valve (141), and the fourth valve (141) is arranged at the upper end of the first circulation pipe (140).

5. The polyester polyol reaction device according to claim 4, characterized in that: The polyester polyol reaction device includes a cleaning mechanism, which includes a first cleaning pipe (150), a first water pump (151) and a fifth valve (142). The first water pump (151) is arranged on the first cleaning pipe (150). A second branch pipe (143) is provided at the upper end of the first circulation pipe (140). The second branch pipe (143) corresponds to between the fourth valve (141) and the reactor (100). The first cleaning pipe (150) is connected to the second branch pipe (143). The fifth valve (142) is arranged on the second branch pipe (143).

6. The polyester polyol reaction device according to claim 5, characterized in that: The upper end of the first metering cylinder (200) is provided with a second discharge pipe (220), and the second discharge pipe (220) is connected to the first raw pulp pipe (270). The first metering cylinder (200) is provided with a first piston (230), and the lower end of the first piston (230) is provided with a first push rod (231). The lower end of the first metering cylinder (200) is provided with a first guide hole (240), and the first guide hole (240) matches the first push rod (231). The lower end of the first metering cylinder (200) is provided with a first cylinder (260), and the first cylinder (260) is connected to the first push rod (231). The upper end of the first metering cylinder (200) is provided with a third feeding pipe (210). The first metering cylinder (200) is provided with a first positioning ring (251) and a second positioning ring (252), and the first positioning ring (251) and the second positioning ring (252) are both matched with the first piston (230).

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