CN217042544U - Trimethylolpropane condensation reaction kettle system - Google Patents

Abstract

The utility model belongs to the technical field of fine chemistry industry, a trimethylolpropane condensation reaction cauldron system is related to. The system comprises a condensation reaction kettle, a circulating pump, a plate heat exchanger and a n-butyraldehyde feeding pipeline; the condensation reaction kettle comprises a kettle body, a bottom discharge hole and a top return port; a discharge port at the bottom of the condensation reaction kettle is connected with a plate heat exchanger through a circulating pump, and the plate heat exchanger is connected with a reflux port at the top of the condensation reaction kettle; the n-butyraldehyde feeding pipeline is arranged between the plate heat exchanger and a top backflow port of the condensation reaction kettle, and the pH online analyzer is arranged between a bottom discharge port of the condensation reaction kettle and the plate heat exchanger. This system, through setting up condensation liquid circulative cooling pipeline, the cauldron temperature of effective control condensation cauldron still can make n-butyraldehyde can fully cool off before getting into condensation reation kettle, further reduces the cauldron temperature during reaction, but real-time supervision and the interior reaction system's of fine setting cauldron pH, and the stirring process is more abundant fast.

Description

Trimethylolpropane condensation reaction kettle system

Technical Field

The utility model belongs to the technical field of fine chemistry industry, a trimethylolpropane condensation reaction kettle system is related to.

Background

At present, in the chemical production process, a condensation kettle is needed to be used as a reaction vessel for realizing the reaction of a plurality of materials, such as trimethylolpropane. However, the existing condensation kettle has many defects, such as single design and easy consumption and long time during stirring; in operation, the temperature of the reaction of materials in the kettle is inconvenient to be accurately controlled, so that the temperature is easy to rise too fast, and meanwhile, the reaction depth needs to be reflected by a rear working section; at the end of the reaction, the final state of the material cannot be controlled.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a trimethylolpropane condensation reaction cauldron system, the cauldron temperature in the effective control condensation reaction cauldron to real-time supervision and fine setting system pH make the material reaction more abundant and controllable.

The utility model provides an above-mentioned technical problem's technical scheme as follows.

A trimethylolpropane condensation reaction kettle system comprises a condensation reaction kettle, a circulating pump, a plate heat exchanger and a n-butyl aldehyde feeding pipeline; the condensation reaction kettle comprises a kettle body, and a bottom discharge port and a top reflux port which are arranged on the kettle body; a discharge port at the bottom of the condensation reaction kettle is connected with a tube pass inlet of the plate heat exchanger through a circulating pump, and a tube pass outlet of the plate heat exchanger is connected with a reflux port at the top of the condensation reaction kettle; the n-butyl aldehyde feeding pipeline is arranged on a connecting pipeline between the plate heat exchanger and a top reflux port of the condensation reaction kettle; the pH on-line analyzer is arranged on a connecting pipeline between a discharge port at the bottom of the condensation reaction kettle and the plate heat exchanger. According to the technical scheme, the condensation liquid and the circulating water exchange heat through the plate heat exchanger, so that a condensation liquid circulating cooling pipeline is formed, and the kettle temperature of the condensation kettle is controlled; the n-butyraldehyde feeding pipeline is arranged on the condensation liquid circulating pipeline, so that the n-butyraldehyde can fully flow along with the n-butyraldehyde, and can be fully cooled before entering a condensation reaction kettle, and further can be used as one of ways for further reducing the temperature in the reaction kettle.

Further, the system also comprises a pH on-line analyzer; the pH on-line analyzer is arranged on the condensation liquid circulating pipeline, so that the on-line detection of the system pH is realized, and the pH can be finely adjusted in time.

Further, the system also comprises a liquid caustic soda feed line; the condensation reaction kettle also comprises a liquid caustic soda feed inlet arranged on the kettle body and an inner ring pipe arranged in the kettle body, and a plurality of spray headers are uniformly arranged on the inner ring pipe; the liquid caustic soda feeding pipeline is connected with a liquid caustic soda feeding port of the condensation reaction kettle, and the liquid caustic soda feeding port is communicated with the inner ring pipe through a connecting pipeline; the liquid caustic soda can be sprayed downwards through the inner ring pipe to be fed, so that the liquid caustic soda can be more uniformly added into the condensation reaction kettle.

Furthermore, the condensation reaction kettle of the system also comprises a stirring shaft and a stirrer which are arranged in the kettle body; the number of the stirrers is 4, the stirrers are sequentially arranged on the stirring shaft, each stirrer comprises 2 stirring blades, and the blade edges of the stirring blades are in a sawtooth shape; the area of the stirring blade and the condensation liquid in the kettle can be increased during stirring, and the stirring is faster and more sufficient.

Further, in the system, the length of the stirring blade of the stirrer positioned at the uppermost end is less than that of the stirring blades of the 3 stirrers positioned below the stirrer; so that part of kinetic energy can be saved in the stirring process, and the materials in the kettle can be fully stirred.

Further, the system also comprises a sampling device; the sampling device is arranged at the lower part of the condensation reaction kettle body; through set up sampling device in cauldron body lower part, can carry out the analysis to the condensation liquid of the internal portion of cauldron, guarantee the promptness of sample.

Further, the system comprises a sampling device, a sampling valve and a control device, wherein the sampling device comprises a right-angle elbow and a sampling ball valve; the right-angle elbow is connected with the sampling ball valve through a flange and communicated with the kettle body of the condensation reaction kettle; through taking a sample perpendicularly to ground, can prevent that the sample from taking place to splash when taking a sample to guarantee the validity of the sample of obtaining.

Furthermore, the condensation reaction kettle of the system also comprises a bottom bearing and a fixed rod which are arranged in the kettle body; the bottom end of the stirring shaft is connected with a bottom bearing, and the bottom bearing is fixed on the inner wall of the kettle body through a fixed rod; used for fixing and positioning the non-driving end of the stirring shaft.

Furthermore, the condensation reaction kettle of the system also comprises a stirring motor, a speed reducer and a coupling which are arranged outside the kettle body and are sequentially connected, a rack for fixing the stirring motor, the speed reducer and the coupling, a bottom plate for fixing the rack and a mechanical seal for sealing the stirring shaft; the stirring motor, the speed reducer and the coupler can be effectively fixed, and the stirring shaft is effectively sealed.

Further, the system also comprises a liquid level meter; the liquid level meter is arranged on the kettle body of the condensation reaction kettle; and monitoring the liquid level in the kettle body in real time.

The trimethylolpropane condensation reaction kettle system has the advantages that the kettle temperature of the condensation kettle is effectively controlled by arranging the condensation liquid circulating cooling pipeline, and meanwhile, the n-butyl aldehyde feeding pipeline is arranged on the circulating return pipeline, so that the n-butyl aldehyde can be fully cooled before entering the condensation reaction kettle, and the kettle temperature during reaction is further reduced; by arranging the pH on-line analyzer, the liquid level meter and the sampling device, the pH of a reaction system in the kettle can be monitored and finely adjusted in real time, the liquid level of the reaction system can be monitored in real time, and the condensation liquid can be analyzed timely and effectively; through the design of the shape and the arrangement of the stirring blades, the stirring process can be faster and more sufficient, and the kinetic energy can be saved.

Drawings

FIG. 1 is a schematic view of a trimethylolpropane condensation reaction kettle system of the present invention;

the codes in the figures are respectively: 1-1, a kettle body; 1-2, a bottom discharge hole; 1-3, a top reflux port; 1-4, a liquid caustic soda feed inlet; 1-5, an inner ring pipe; 1-51, a spray header; 1-6, a stirring shaft; 1-7, a stirrer; 1-71, stirring leaves; 1-8, a bottom bearing; 1-9, fixing a rod; 1-10 parts of a stirring motor; 1-11, a speed reducer; 1-12, a coupler; 1-13, a frame; 1-14, a bottom plate; 1-15, machine sealing; 2. a circulation pump; 3. a plate heat exchanger; 4. a n-butyraldehyde feed line; 5. a pH on-line analyzer; 6. a liquid caustic feed line; 7. a sampling device; 7-1, a right-angle elbow; 7-2, a sampling ball valve; 8. a liquid level meter.

Detailed Description

As shown in figure 1, the trimethylolpropane condensation reaction kettle system comprises a condensation reaction kettle, a circulating pump 2, a plate heat exchanger 3, a n-butyraldehyde feeding pipeline 4, a pH on-line analyzer 5, a liquid caustic soda feeding pipeline 6, a sampling device 7 and a liquid level meter 8.

The condensation reaction kettle comprises a kettle body 1-1, a bottom discharge port 1-2 arranged outside the kettle body 1-1, a top return port 1-3, a liquid caustic soda feed port 1-4, a stirring motor 1-10, a speed reducer 1-11, a coupler 1-12, a rack 1-13, a bottom plate 1-14, a mechanical seal 1-15, an inner annular tube 1-5 arranged inside the kettle body 1-1, a stirring shaft 1-6, a stirrer 1-7, a bottom bearing 1-8 and a fixing rod 1-9. The stirring motor 1-10, the speed reducer 1-11 and the coupling 1-12 are sequentially connected, the frame 1-13 is used for fixing the stirring motor 1-10, the speed reducer 1-11 and the coupling 1-12, the bottom plate 1-14 is used for fixing the frame 1-13, and the mechanical seal 1-15 is used for sealing and fixing the stirring shaft 1-6; specifically, a speed reducer 1-11 is fixedly arranged at the center of the top of the kettle body 1-1, a stirring motor 1-10 is fixed at the top of the speed reducer 1-11, the stirring motor 1-10 is connected with a coupler 1-12 through the speed reducer 1-11, the stirring motor 1-10, the coupler 1-12 and the speed reducer 1-11 are all fixed through a rack 1-13, and a bottom plate 1-14 is fixed at the right upper end of the kettle body 1-1 and used for fixing the rack 1-13. The stirring shaft 1-6 is connected with the coupling 1-12, and the stirring shaft 1-6 and the kettle body 1-1 are fixedly sealed through a mechanical seal 1-15; stirring shafts 1-6 in the kettle are connected with stirrers 1-7, the number of the stirrers 1-7 is 4, the stirrers 1-7 are sequentially arranged on the stirring shafts 1-6, each stirrer 1-7 comprises 2 stirring blades 1-71, the blade edges of the stirring blades 1-71 are in a sawtooth shape, meanwhile, the length of the stirring blade 1-71 of the stirrer 1-7 positioned at the uppermost end is smaller than that of the stirring blade 1-71 of the stirrer 1-7 positioned below the stirrer, and the stirrer 1-7 positioned at the uppermost end is arranged at the position closest to the liquid level; the bottom end of the stirring shaft 1-6 is connected with a bottom bearing 1-8, and the bottom bearing 1-8 is fixed on the inner wall of the bottom of the kettle body 1-1 through a fixing rod 1-9; a plurality of spray headers 1-51 are uniformly arranged on the inner ring pipe 1-5, a liquid caustic soda feed pipeline 6 is connected with a liquid caustic soda feed inlet 1-4 of the condensation reaction kettle, and the liquid caustic soda feed inlet 1-4 is communicated with the inner ring pipe 1-5 through a connecting pipeline; in addition, the top of the kettle body 1-1 is also provided with a process water feeding port, a formic acid feeding port, a formaldehyde feeding port, a low-pressure nitrogen gas inlet and a tail gas outlet, and the top of the kettle body 1-1 is provided with two observation ports which can observe the change state of materials in real time during the feeding operation of the condensation reaction kettle.

A discharge port 1-2 at the bottom of the condensation reaction kettle is connected with a tube pass inlet of a plate heat exchanger 3 through a circulating pump 2, a tube pass outlet of the plate heat exchanger 3 is connected with a return port 1-3 at the top of the condensation reaction kettle, and the plate heat exchanger is circularly cooled by circulating water entering and exiting; the n-butyraldehyde feeding pipeline 4 is arranged on a connecting pipeline between the plate heat exchanger 3 and a top reflux port 1-3 of the condensation reaction kettle; the pH on-line analyzer 5 is arranged on a connecting pipeline between a discharge port 1-2 at the bottom of the condensation reaction kettle and the plate heat exchanger 3.

The sampling device 7 is arranged at the lower part of the kettle body 1-1, specifically, the sampling device 7 comprises a right-angle elbow 7-1 and a sampling ball valve 7-2, the right-angle elbow 7-1 is connected with the sampling ball valve 7-2 through a flange, and the right-angle elbow 7-1 is communicated with the kettle body 1-1 of the condensation reaction kettle; the liquid level meter 8 is arranged on the kettle body 1-1 of the condensation reaction kettle.

The working process of the trimethylolpropane condensation reaction kettle system of the utility model is that when the trimethylolpropane condensation reaction kettle system is used, the pipeline valve connected with the trimethylolpropane condensation reaction kettle is firstly closed, the feeding is started in the kettle through each feeding port, and the required amount of each strand of material is determined to be injected through the calculated ratio between the materials; after the injection, starting the stirrers 1-7 and the circulating pump 2 for beating circulation; during circulation, quantitative feeding is carried out through a reactant top return port 1-3 at the outlet of the plate heat exchanger 3; at the moment, the temperature change in the kettle is strictly monitored, if the temperature rises too fast, the circulating water side of the plate heat exchanger 3 needs to be opened, the temperature is reduced and cooled by utilizing the circulating water, and the temperature is strictly controlled within an index range according to the change condition of the temperature in the kettle until the temperature is finally stable; after the feeding is finished, adding corresponding materials into the kettle to adjust the pH value of the condensation liquid in the kettle; after the materials in the kettle are completely reacted, stopping the circulating pump 2 and the stirrer 1-7; sampling can be carried out through the sampling device 7, and the condensation liquid in the kettle is analyzed, so that the timeliness of sampling and the effectiveness of the sampled product are ensured; and finally, enabling the condensation liquid to flow into a condensation liquid storage tank for use through a material outlet at the bottom of the kettle.

In the condensation reaction kettle system, the inlet of the plate heat exchanger 3 is connected with the kettle bottom material outlet of the kettle body 1-1, and the outlet is a kettle top circulating reflux port, so that the temperature in the kettle can be conveniently and timely adjusted during condensation reaction of the materials in the kettle; and the feed inlet as reactant is connected on the outlet pipeline of the plate heat exchanger 3 circulating in the condensation reaction kettle, so that the materials which are just cooled are preliminarily mixed and enter the kettle along with the materials circulating in the kettle, and the fluidity of the reaction materials is increased.

The use process of the stirrer 1-7 is that the stirring motor 1-10 drives the speed reducer 1-11 to rotate, the speed reducer 1-11 controls the rotating speed to prevent the rotating speed from being too high during stirring, the speed reducer 1-11 drives the stirring shaft 1-6 to rotate through the coupler 1-12, and the stirring shaft 1-6 drives the stirrer 1-7 to rotate; at this time, the length of the stirring blade 1-71 of the uppermost stirrer 1-7 is smaller than that of the stirring blade 1-71 of the lowermost 3 stirrers 1-7, and the blade edge of each stirring blade 1-71 is saw-toothed, so that a part of kinetic energy can be saved in the stirring process, thereby realizing the sufficient stirring of the materials in the kettle.

In the sampling device 7, a sampling port is vertical to the ground through a 90-degree elbow 7-1 and is connected with a sampling ball valve 7-2 through a flange, and meanwhile, the distance between the sampling ball valve 7-2 and the 90-degree elbow 7-1 is set to be the minimum distance, so that excessive non-circulating condensation liquid at a low point in a pipeline after sampling is prevented, and the sample can be prevented from splashing when being vertical to the ground; when the worker samples at every time, the worker can slightly open the sampling ball valve 7-2, so that the sampling is started after the material flows smoothly and uniformly, and the effectiveness of the obtained sample is ensured.

Claims (10)

1. A trimethylolpropane condensation reaction kettle system is characterized by comprising a condensation reaction kettle, a circulating pump (2), a plate type heat exchanger (3) and a n-butyl aldehyde feeding pipeline (4);

the condensation reaction kettle comprises a kettle body (1-1), and a bottom discharge hole (1-2) and a top reflux hole (1-3) which are arranged on the kettle body (1-1);

a bottom discharge port (1-2) of the condensation reaction kettle is connected with a tube pass inlet of a plate heat exchanger (3) through a circulating pump (2), and a tube pass outlet of the plate heat exchanger (3) is connected with a top reflux port (1-3) of the condensation reaction kettle;

the n-butyraldehyde feeding pipeline (4) is arranged on a connecting pipeline between the plate heat exchanger (3) and a top reflux port (1-3) of the condensation reaction kettle.

2. The trimethylolpropane condensation reactor system according to claim 1, further comprising a pH on-line analyzer (5); the pH on-line analyzer (5) is arranged on a connecting pipeline between a bottom discharge port (1-2) of the condensation reaction kettle and the plate heat exchanger (3).

3. The trimethylolpropane condensation reactor system according to claim 1, further comprising a liquid caustic feed line (6); the condensation reaction kettle also comprises a liquid caustic soda feed inlet (1-4) arranged on the kettle body (1-1) and an inner ring pipe (1-5) arranged inside the kettle body (1-1), wherein a plurality of spray headers (1-51) are uniformly arranged on the inner ring pipe (1-5); the liquid caustic soda feeding pipeline (6) is connected with liquid caustic soda feeding ports (1-4) of the condensation reaction kettle, and the liquid caustic soda feeding ports (1-4) are communicated with the inner ring pipe (1-5) through connecting pipelines.

4. The trimethylolpropane condensation reaction kettle system according to claim 1, wherein the condensation reaction kettle further comprises a stirring shaft (1-6) and a stirrer (1-7) which are arranged inside the kettle body (1-1); the stirrer is characterized in that the number of the stirrers (1-7) is 4, the stirrers (1-7) are sequentially arranged on the stirring shafts (1-6), each stirrer (1-7) comprises 2 stirring blades (1-71), and the blade edges of the stirring blades (1-71) are in a sawtooth shape.

5. The trimethylolpropane condensation reaction tank system according to claim 4, wherein the length of the blade (1-71) of the stirring blade of the uppermost stirrer (1-7) is shorter than the length of the blade (1-71) of the stirring blade of the 3 underlying stirrers (1-7).

6. The trimethylolpropane condensation reactor system according to claim 1, further comprising a sampling device (7); the sampling device (7) is arranged at the lower part of the condensation reaction kettle body (1-1).

7. Trimethylolpropane condensation reactor system according to claim 6, characterised in that the sampling device (7) comprises a square bend (7-1), a sampling ball valve (7-2); the elbow (7-1) is connected with the sampling ball valve (7-2) through a flange, and the elbow (7-1) is communicated with the kettle body (1-1) of the condensation reaction kettle.

8. The trimethylolpropane condensation reaction kettle system according to claim 4, wherein the condensation reaction kettle further comprises a bottom bearing (1-8) and a fixing rod (1-9) which are arranged inside the kettle body (1-1); the bottom end of the stirring shaft (1-6) is connected with a bottom bearing (1-8), and the bottom bearing (1-8) is fixed on the inner wall of the kettle body (1-1) through a fixing rod (1-9).

9. The trimethylolpropane condensation reaction kettle system according to claim 8, further comprising a stirring motor (1-10), a speed reducer (1-11) and a coupling (1-12) which are arranged outside the kettle body (1-1) and are sequentially connected, a frame (1-13) for fixing the stirring motor (1-10), the speed reducer (1-11) and the coupling (1-12), a bottom plate (1-14) for fixing the frame (1-13), and a mechanical seal (1-15) for sealing the stirring shaft (1-6).

10. The trimethylolpropane condensation reactor system according to claim 1, further comprising a level gauge (8); the liquid level meter (8) is arranged on the kettle body (1-1) of the condensation reaction kettle.

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