Esterification reaction condensing device

Abstract

The utility model discloses an esterification reaction condensing device, which relates to the technical field of polyurethane production, and comprises a reaction kettle, a stirring component is arranged in the reaction kettle, a conveying component is arranged at the lower end of the reaction kettle, a condensing component is arranged at the upper end of the reaction kettle, and the condensing component comprises a steam pipe. The two steam pipes are fixedly connected with the two sides of the upper end of the reaction kettle respectively, the end, away from the reaction kettle, of each steam pipe is fixedly connected with a condensation box, and a plurality of condensation pipes are arranged in each condensation box. According to the condensation assembly, steam is effectively separated through the arrangement of a plurality of condensation boxes and condensation pipes, so that the condensation effect is improved, the overall condensation speed and effect are improved to a great extent through multi-pipe short-distance condensation, and the condensation efficiency of the device is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to polyurethane production technical field, concretely is a kind of esterification condensing device. BACKGROUND

[0002] Polyurethane is a kind of high molecular material with wide application, they are prepared by the reaction of polyisocyanate and polyol, in certain circumstances, especially in the preparation of polyurethane prepolymer or certain special type of polyurethane, esterification reaction can be involved;A certain amount of gas is generated in esterification reaction, gas needs to be condensed and recovered at this time, at present, most of the esterification reaction kettle is roughly condensed when condensing and recovering gas, and the micro-particles contained in gas are not removed, thereby affecting the effect of gas condensation.

[0003] The esterification reaction kettle condensing and recovering device with the publication number CN219631281U is disclosed, by setting the condensing and recovering assembly, the filtered gas will pass through the inlet pipe into the condensing pipe, the water pump in the water tank will input water into the condensing pipe through the water inlet pipe, and then the water will flow back into the water tank from the water outlet pipe, at this time, the gas in the condensing pipe will gradually become liquid under the action of cold water and flow into the recovery tank, part of the gas will enter the recovery tank, at this time, the gas will flow back into the inlet pipe through the return pipe again, and the condensed gas is collected again, which is convenient for subsequent operation, and the uncondensed gas is repeatedly condensed, which avoids the waste of resources.

[0004] But the device adopts single-pipe setting and the process is too long, and the condensing pipe will absorb the heat of steam during condensation, resulting in poor condensation effect, although the reflux function is set to improve the efficiency, but the overall condensation effect is poor, and the condensation time is long, which will cause the steam to be unable to condense in time and stay, and also cause reflux, resulting in excessive internal air pressure. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of esterification condensing device, to solve the problems of too long process of single-pipe setting, poor overall condensation effect and long condensation time in prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] An esterification condensing device, comprising a reaction kettle, the reaction kettle is internally provided with a stirring assembly, the lower end of the reaction kettle is provided with a conveying assembly, and the upper end of the reaction kettle is provided with a condensing assembly.

[0008] The condensing assembly comprises steam pipes, two of which are fixedly connected to both sides of the upper end of the reaction kettle, one condensing box is fixedly connected to the end of each steam pipe away from the reaction kettle, a plurality of condensing pipes are arranged in each condensing box, a reflux copper pipe is fixedly connected to the output end of each condensing pipe, the other end of each reflux copper pipe penetrates through the upper surface of the condensing box and is fixedly connected to the upper end of a water tank, and an inlet pipe is fixedly connected to the input end of each condensing pipe.

[0009] Based on the above technical scheme, the utility model further provides the following optional technical schemes.

[0010] In an optional scheme, a filter screen is arranged at the end of each condensing box adjacent to the steam pipe.

[0011] In an optional scheme, the water tank is arranged at one side of the upper end of the reaction kettle, a water pump is arranged through the lower end of the water tank, a concentrating pipe is fixedly connected to the output end of the water pump, and the concentrating pipe is fixedly connected to the lower end of each water pump.

[0012] In an optional scheme, a water outlet pipe is fixedly connected to the lower surface of the end of each condensing box away from the reaction kettle.

[0013] In an optional scheme, the conveying assembly comprises a feeding pipe, a discharge port is fixedly connected to the lower surface of the end of the feeding pipe away from the reaction kettle, a rotating rod is rotatably arranged in the feeding pipe, a spiral feeder is wound around the outer side of the rotating rod, the rotating rod is arranged through the outer side of the feeding pipe at one end, a first motor is fixedly connected to the outer side of the feeding pipe, and the output end of the first motor is fixedly connected to the other end of the adjacent rotating rod.

[0014] In an optional scheme, the upper end of the feeding pipe is fixedly connected to the middle part of the lower end of the reaction kettle through an electric valve.

[0015] In an optional scheme, the stirring assembly comprises a second motor, the second motor is fixedly connected to the middle part of the upper end of the reaction kettle, the output end of the second motor is arranged through the upper end in the reaction kettle and is fixedly connected to a transmission rod, a plurality of cross rods are arranged around the transmission rod, and a plurality of stirring rods are fixedly connected to the other ends of the cross rods.

[0016] In an optional scheme, all the cross rods are arranged in a circumferential array on the outer side of the upper end of the transmission rod, and one end of each cross rod is fixedly connected to one side of the adjacent transmission rod.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The utility model discloses a condensing assembly is set up, wherein the steam is effectively separated through the setting of multiple condensing boxes and condensing pipes, thereby improving the condensing effect, adopting multi -tube short -range condensing, greatly improve the overall condensing speed and effect, thereby effectively improve the condensing efficiency of the device, relieve the gas pressure in the reaction kettle, improve esterification efficiency, and the backflow copper pipe adopts the setting of copper pipe, effectively improves the heat dissipation effect when backflowing, reduces the water temperature of the water tank inside backflowing, thereby can better realize the circulation condensation.

[0019] 2. The utility model discloses a conveying assembly is set up, can after esterification reaction is completed, fast conveying material to the outside of reaction kettle, avoid the situation such as plugging, effectively improve the whole efficiency of esterification reaction, thereby further improve production efficiency. DRAWINGS

[0020] Figure 1 It is the whole structure schematic diagram of the utility model.

[0021] Figure 2 It is the stirring assembly structure schematic diagram of the utility model.

[0022] Figure 3 It is the condensing assembly structure schematic diagram of the utility model.

[0023] Figure 4 It is the conveying assembly structure schematic diagram of the utility model.

[0024] Figure mark annotation: 1, reaction kettle;2, downcomer;3, discharge port;4, first motor;5, second motor;6, transmission rod;7, cross bar;8, stir bar ware;9, steam pipe;10, spiral feeder;11, rotary rod;12, condensing box;13, filter screen;14, condensing pipe;15, backflow copper pipe;16, water inlet pipe;17, water tank;18, water pump;19, concentration pipe;20, water outlet pipe. DETAILED DESCRIPTION

[0025] In order to make the utility model's purpose, technical scheme and advantage more clearly clear, the following is combined with the drawing and example, and the utility model is further detailed.

[0026] In one embodiment, as shown in Figures 1-4 An esterification condensation device, comprising a reaction kettle 1, the reaction kettle 1 is internally provided with a stirring assembly, the reaction kettle 1 lower end is provided with a conveying assembly, and the reaction kettle 1 upper end is provided with a condensing assembly.

[0027] The condensing assembly comprises two steam pipes 9 fixedly connected with both sides of the upper end of the reaction kettle 1 respectively, one condensing box 12 is fixedly connected with the end of each steam pipe 9 away from the reaction kettle 1, a plurality of condensing pipes 14 are arranged in each condensing box 12, a reflux copper pipe 15 is fixedly connected with the output end of each condensing pipe 14, the other end of the reflux copper pipe 15 penetrates through the upper surface of the condensing box 12 and is fixedly connected with the upper end of a water tank 17, and one water inlet pipe 16 is fixedly connected with the input end of each condensing pipe 14.

[0028] In the embodiment, the condensing efficiency of steam is improved by the condensing assembly, and then the material after the reaction is uniformly transported away by the conveying assembly.

[0029] In one embodiment, as shown in Figure 3 , a filter screen 13 is arranged at the end of each condensing box 12 adjacent to the steam pipe 9 to filter the impurities in the steam.

[0030] In one embodiment, as shown in Figure 3 , the water tank 17 is arranged at one side of the upper end of the reaction kettle 1, a water pump 18 is arranged penetratingly at the lower end of the water tank 17, a concentration pipe 19 is fixedly connected with the output end of the water pump 18, and the concentration pipe 19 is fixedly connected with the lower end of the water pump 18 respectively. The condensed water is extracted by the water pump 18 and then transmitted into each condensing pipe 14 through the concentration pipe 19.

[0031] In one embodiment, as shown in Figure 3 , one water outlet pipe 20 is fixedly connected with the lower surface of the end of each condensing box 12 away from the reaction kettle 1, for collecting the condensed steam.

[0032] In one embodiment, as shown in Figure 1 and Figure 4 , the conveying assembly comprises a discharging pipe 2, the discharging pipe 2 is fixedly connected with a discharging port 3 at the lower surface of the end of the discharging pipe 2 away from the reaction kettle 1, a rotating rod 11 is rotatably arranged in the discharging pipe 2, a spiral feeder 10 is wound on the outer side of the rotating rod 11, the rotating rod 11 is arranged penetratingly on the outer side of the discharging pipe 2, a first motor 4 is fixedly connected with the outer side of the discharging pipe 2, the output end of the first motor 4 is fixedly connected with the end of the adjacent rotating rod 11, the electric valve on the upper end of the discharging pipe 2 is opened, the first motor 4 drives the rotating rod 11 and the spiral feeder 10 to start rotating, and the material is uniformly transported into the collecting device.

[0033] In one embodiment, as shown in Figure 4 , the upper end of the discharging pipe 2 is fixedly connected with the middle part of the lower end of the reaction kettle 1 through the electric valve.

[0034] In one embodiment, as shown in Figure 2As shown, the stirring assembly comprises a second motor 5 fixedly connected to the middle of the upper end of the reaction kettle 1, the output end of the second motor 5 is provided through the upper end of the reaction kettle 1 and fixedly connected with a transmission rod 6, a plurality of cross bars 7 are provided around the transmission rod 6, and a plurality of stirring rods 8 are fixedly connected to the other ends of the cross bars 7, the second motor 5 is started to drive the transmission rod 6 and the cross bars 7 to rotate, and then drive each stirring rod 8 to rotate, so as to start to uniformly stir the raw materials in the reaction kettle 1.

[0035] In one embodiment, as Figure 2 As shown, all the cross bars 7 are arranged in a circumferential array on the outer side of the upper end of the transmission rod 6, and one end of each cross bar 7 is fixedly connected to one side of the adjacent transmission rod 6.

[0036] The above embodiment discloses an esterification reaction condensing device, wherein the raw materials are put into the inside of the reaction kettle 1 to start the esterification reaction, at this time the second motor 5 is started to drive the transmission rod 6 and the cross bars 7 to rotate, and then drive each stirring rod 8 to rotate, so as to start to uniformly stir the raw materials in the reaction kettle 1, at this time the generated steam will come to the inside of the condensing box 12 through the steam pipe 9, be filtered by the filter screen 13, and then be in contact with the condensing pipe 14 to start to be condensed, and then be collected by the water outlet pipe 20, while the condensed water in the condensing pipe 14 is cooled by the return copper pipe 15 and returned to the inside of the water tank 17, and then is pumped by the water pump 18 after being cooled in the water tank 17, and is transmitted to the condensing pipe 14 again through the concentrating pipe 19 and the water inlet pipe 16 to form a cycle to continuously cool, and after the esterification reaction is completed, the electric valve on the upper end of the discharging pipe 2 is opened, and the first motor 4 drives the rotating rod 11 and the screw feeder 10 to start to rotate, so as to uniformly feed the materials to the collecting device.

[0037] The above only describes specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An esterification reaction condensing device, comprising a reaction kettle (1), a stirring assembly is arranged inside the reaction kettle (1), a conveying assembly is arranged at the lower end of the reaction kettle (1), and a condensing assembly is arranged at the upper end of the reaction kettle (1). characterized in that The condensing assembly comprises two steam pipes (9), which are respectively fixedly connected to the upper end of the reaction kettle (1) on both sides, one condensing box (12) is fixedly connected to the end of each steam pipe (9) away from the reaction kettle (1), a plurality of condensing pipes (14) are arranged inside each condensing box (12), a reflux copper pipe (15) is fixedly connected to the output end of each condensing pipe (14), and the other end of each reflux copper pipe (15) penetrates through the upper surface of the condensing box (12) and is fixedly connected to the upper end of a water tank (17), and the input end of each condensing pipe (14) is fixedly connected with a water inlet pipe (16).

2. The esterification reaction condensing apparatus according to claim 1, wherein A filter screen (13) is arranged at the end of the condensing box (12) adjacent to the steam pipe (9).

3. The esterification reaction condensing apparatus according to claim 1, wherein The water tank (17) is arranged on one side of the upper end of the reaction kettle (1), a water pump (18) is penetratingly arranged at the lower end of the water tank (17), a concentrating pipe (19) is fixedly connected to the output end of the water pump (18), and the concentrating pipe (19) is fixedly connected to the lower end of each water pump (18).

4. The esterification reaction condensing apparatus according to claim 1, wherein An outlet pipe (20) is fixedly connected to the lower surface of the end of the condensing box (12) away from the reaction kettle (1).

5. The esterification reaction condensing apparatus according to claim 1, wherein The conveying assembly comprises a feeding pipe (2), an outlet (3) is fixedly connected to the lower surface of the end of the feeding pipe (2) away from the reaction kettle (1), a rotating rod (11) is rotatably arranged inside the feeding pipe (2), a spiral feeder (10) is wound around the outer side of the rotating rod (11), the rotating rod (11) penetrates through the outer side of the feeding pipe (2) at one end, a first motor (4) is fixedly connected to the outer side of the feeding pipe (2), and the output end of the first motor (4) is fixedly connected to one end of the adjacent rotating rod (11).

6. The esterification reaction condensing apparatus according to claim 5, wherein The upper end of the feeding pipe (2) is fixedly connected to the middle of the lower end of the reaction kettle (1) through an electric valve.

7. The esterification reaction condensing apparatus according to claim 1, wherein The stirring assembly comprises a second motor (5), the second motor (5) is fixedly connected to the middle of the upper end of the reaction kettle (1), the output end of the second motor (5) penetrates through the upper end of the reaction kettle (1) and is fixedly connected with a transmission rod (6), a plurality of cross rods (7) are arranged around the transmission rod (6), and the other ends of the cross rods (7) are fixedly connected with a plurality of stirring rods (8).

8. The esterification reaction condensing apparatus according to claim 7, wherein All the cross rods (7) are circumferentially arranged on the outer side of the upper end of the transmission rod (6), and one end of each cross rod (7) is fixedly connected to one side of the adjacent transmission rod (6).

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