Butyronitrile latex polymerization reaction kettle capable of conveniently and accurately controlling temperature

Abstract

The utility model relates to the technical field of reaction kettles, in particular to a butyronitrile latex polymerization reaction kettle convenient for accurate temperature control, which comprises a kettle body, a heating unit arranged in the kettle body and a stirring mechanism arranged in the kettle body, and the stirring mechanism comprises a rotating rod rotationally connected to the inner bottom wall of the kettle body. A stirring paddle is fixedly connected to the surface of the rotating rod, a motor is fixedly mounted on the upper surface of the kettle body, an output shaft of the motor is fixedly connected with a main bevel gear, a rotating opening is formed in the upper surface of the kettle body, and the upper end of the rotating rod extends out of the upper surface of the kettle body through the rotating opening and is fixedly connected with an auxiliary bevel gear. According to the utility model, through the sampling mechanism, under the action of the negative pressure pump, the collection bottle is subjected to negative pressure, and the collection bottle with negative pressure pumps raw materials in the kettle body into the collection bottle through the extraction pipe and the sampling hole channel, so that the purpose of sealed sampling is achieved, the kettle body is prevented from breaking a constant-temperature state due to temperature loss, and a guarantee is brought to a polymerization reaction of latex.

Description

Technical Field

[0001] The utility model relates to the technical field of reaction kettles, in particular to a polymerization reaction kettle for nitrile latex which is convenient for accurate temperature control. Background Art

[0002] Carboxylated styrene butadiene latex is a copolymer produced by emulsion polymerization of butadiene, styrene, a small amount of carboxylic acid and other additives. It is a milky white aqueous dispersion with a bluish purple luster.

[0003] In the prior art, a Chinese patent with publication number CN218981535U discloses a precisely temperature-controlled carboxyl nitrile latex polymerization reactor, which adopts the scheme of "including a nitrogen tank and an air outlet fixedly connected to the top of the nitrogen tank, the air outlet being threadedly connected to an air inlet column through a hose, one end of the air inlet column being fixedly connected to a reaction tank, the top of the reaction tank being fixedly connected to a rotating motor, the bottom of the rotating motor being fixedly connected to a rotating rod, one side of the rotating motor being provided with a feed port, the rotating motor being provided with a temperature detection sensor on a side away from the feed port, and the outer surface of the reaction tank being fixedly connected with a sampling tube". This scheme arranges sampling tubes, flow meters, solenoid valves and PLC controllers at three different positions to better sample the same amount of liquid at different heights of the reaction tank, thereby more accurately judging the state of the carboxyl nitrile latex reaction in the reaction tank and better ensuring the quality of the carboxyl nitrile latex.

[0004] However, the above scheme still has some shortcomings. For example, the above scheme samples the latex in the reactor by setting up three simple material collection pipes, and this sampling method of the latex flowing out independently is easy to take away the temperature inside the reactor, thereby affecting the temperature inside the reactor, which is not conducive to the polymerization reaction of the latex. In view of this, the utility model proposes a nitrile latex polymerization reactor that is convenient for precise temperature control. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] The purpose of the utility model is to provide a nitrile latex polymerization reaction kettle which is convenient for accurate temperature control and has the advantages of sealed sampling and preheating raw materials, so as to solve the problem in the above-mentioned background technology that the temperature in the kettle body is easily taken away during sampling, thereby affecting the overall temperature.

[0007] (II) Technical solution

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A nitrile latex polymerization reactor convenient for precise temperature control comprises a reactor body, a heating unit is arranged inside the reactor body, a stirring mechanism is arranged inside the reactor body, the stirring mechanism comprises a rotating rod rotatably connected to the bottom wall of the reactor body, a stirring paddle is fixedly connected to the surface of the rotating rod, a motor is fixedly installed on the upper surface of the reactor body, a main bevel gear is fixedly connected to the output shaft of the motor, a rotating opening is opened on the upper surface of the reactor body, the upper end of the rotating rod extends out of the upper surface of the reactor body through the rotating opening and is fixedly connected to a secondary bevel gear, a sampling mechanism is arranged on the right surface of the reactor body, and a preheating mechanism is arranged on the left surface of the reactor body;

[0010] The sampling mechanism includes a negative pressure pump fixedly installed on the right side surface of the kettle body, a sampling channel extending from the lower end to the upper end of the rotating rod, an extraction tube rotatably connected to the upper end of the rotating rod, an end of the extraction tube away from the rotating rod is fixedly connected to the suction end of the negative pressure pump with a mounting cover, and a collecting bottle is threadedly connected to the inner wall of the mounting cover.

[0011] As a preferred technical solution, the main bevel gear and the auxiliary bevel gear are meshed with each other, and the output shaft of the motor is transmission-connected to the rotating rod through the main bevel gear and the auxiliary bevel gear.

[0012] As a preferred technical solution, a temperature sensor and a discharge pipe are respectively provided on the right side surface of the kettle body.

[0013] As a preferred technical solution, a manual valve is provided on the surface of the discharge pipe, and an electric valve is provided on the surface of the extraction pipe.

[0014] As a preferred technical solution, the preheating mechanism includes a sealing box fixedly installed on the left side surface of the kettle body, a ventilation pipe extending to the interior of the sealed box is provided on the upper surface of the kettle body, a spiral temperature conduction pipe is fixedly installed inside the sealed box through a bracket, and a feed pipe fixedly connected to the end of the spiral temperature conduction pipe is provided on the left side surface of the sealed box.

[0015] As a preferred technical solution, the spiral temperature conducting tube is made of temperature conducting copper material, and one end of the spiral temperature conducting tube away from the feed tube extends to the interior of the kettle body.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] 1. The utility model uses a sampling mechanism to create negative pressure in the collecting bottle under the action of a negative pressure pump. The negative pressure collecting bottle pumps the raw materials in the kettle body into the collecting bottle through the extraction tube and the sampling channel, thereby achieving the purpose of sealed sampling, preventing the kettle body from breaking the constant temperature state due to temperature loss, and providing protection for the polymerization reaction of latex.

[0019] 2. The utility model uses a preheating mechanism to transmit the temperature in the kettle body into the sealed box through the ventilation pipe, so that the spiral temperature conducting pipe becomes hot. The heated spiral temperature conducting pipe can heat the latex raw material injected into the feed pipe, thereby achieving the purpose of preheating the raw material and preventing the raw material with too low temperature from entering the kettle body and affecting the temperature inside the kettle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a front view structural schematic diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the front section structure of the utility model from the first viewing angle;

[0023] Figure 3 This is a schematic diagram of the front section structure of the utility model from a second viewing angle;

[0024] Figure 4 For the utility model Figure 3 The enlarged structural diagram at A in the middle;

[0025] Figure 5 It is a schematic diagram of the top-sectional structure of the utility model.

[0026] In the figure: 1. kettle body; 2. rotating rod; 3. stirring paddle; 4. motor; 5. main bevel gear; 6. secondary bevel gear; 7. negative pressure pump; 8. sampling channel; 9. extraction tube; 10. installation cover; 11. collecting bottle; 12. temperature sensor; 13. discharge pipe; 14. electric valve; 15. sealing box; 16. ventilation pipe; 17. spiral temperature conduction pipe; 18. feed pipe. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] According to the attached Figure 1-5 As shown, the embodiment of the utility model provides a nitrile latex polymerization reaction kettle which is convenient for precise temperature control, including a kettle body 1, a heating unit is arranged inside the kettle body 1, a stirring mechanism is arranged inside the kettle body 1, the stirring mechanism includes a rotating rod 2 rotatably connected to the inner bottom wall of the kettle body 1, a stirring paddle 3 is fixedly connected to the surface of the rotating rod 2, a motor 4 is fixedly installed on the upper surface of the kettle body 1, and the output shaft of the motor 4 is fixedly connected to a main bevel gear 5, a rotating opening is opened on the upper surface of the kettle body 1, the upper end of the rotating rod 2 extends out of the upper surface of the kettle body 1 through the rotating opening and is fixedly connected to a sub-bevel gear 6, the main bevel gear 5 and the sub-bevel gear 6 are meshed with each other, the output shaft of the motor 4 is transmission-connected to the rotating rod 2 through the main bevel gear 5 and the sub-bevel gear 6, a sampling mechanism is arranged on the right surface of the kettle body 1, and a preheating mechanism is arranged on the left surface of the kettle body 1.

[0031] The preheating mechanism includes a sealing box 15 fixedly installed on the left side surface of the kettle body 1, a ventilation pipe 16 extending to the inside of the sealing box 15 is arranged on the upper surface of the kettle body 1, a spiral temperature conducting pipe 17 is fixedly installed inside the sealing box 15 through a bracket, and a feed pipe 18 fixedly connected to the end of the spiral temperature conducting pipe 17 is arranged on the left side surface of the sealing box 15. The spiral temperature conducting pipe 17 is made of temperature conducting copper material, and one end of the spiral temperature conducting pipe 17 away from the feed pipe 18 extends to the inside of the kettle body 1.

[0032] The sampling mechanism includes a negative pressure pump 7 fixedly installed on the right side surface of the kettle body 1, a sampling channel 8 extending from the lower end to the upper end of the rotating rod 2, an extraction tube 9 is rotatably connected to the upper end of the rotating rod 2, a sealed bearing is embedded in the upper end of the rotating rod 2, the inner ring surface of the sealed bearing is fixedly connected to the end of the extraction tube 9, and an end of the extraction tube 9 away from the rotating rod 2 is fixedly connected to the suction end of the negative pressure pump 7 with a mounting cover 10, and the inner wall of the mounting cover 10 is threadedly connected to a collecting bottle 11.

[0033] A temperature sensor 12 and a discharge pipe 13 are respectively provided on the right side surface of the kettle body 1. Under the action of the temperature sensor 12, the temperature inside the kettle body 1 can be monitored, so as to achieve the purpose of controlling the internal temperature of the kettle body 1. A manual valve is provided on the surface of the discharge pipe 13, and an electric valve 14 is provided on the surface of the extraction pipe 9.

[0034] The utility model is a nitrile latex polymerization reaction kettle which is convenient for accurate temperature control. When in use, the latex raw material is input into the kettle body 1 through the feeding pipe 18 and the spiral temperature conducting pipe 17. The rotating rod 2 is driven to rotate through the main bevel gear 5 and the secondary bevel gear 6 under the operation of the motor 4. The rotation of the rotating rod 2 drives the stirring paddle 3 to stir the latex raw material in the kettle body 1 to accelerate the speed of its polymerization reaction. When it is necessary to detect and sample the reaction state of the latex in the kettle body 1, the negative pressure in the collecting bottle 11 is made negative under the action of the negative pressure pump 7. The negative pressure collecting bottle 11 pumps the raw material in the kettle body 1 into the collecting bottle 11 through the extraction pipe 9 and the sampling channel 8, thereby achieving the purpose of sealed sampling. At the same time, the temperature in the kettle body 1 is transmitted to the sealing box 15 through the ventilation pipe 16, so that the spiral temperature conducting pipe 17 becomes hot. The heated spiral temperature conducting pipe 17 can heat the latex raw material injected into the feeding pipe 18, thereby achieving the purpose of preheating the raw material.

[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A nitrile latex polymerization reactor that is convenient for accurate temperature control, comprising a reactor body (1), wherein a heating unit is arranged inside the reactor body (1), and characterized in that: The kettle (1) is provided with a stirring mechanism inside, the stirring mechanism comprising a rotating rod (2) rotatably connected to the inner bottom wall of the kettle (1), a stirring paddle (3) being fixedly connected to the surface of the rotating rod (2), a motor (4) being fixedly mounted on the upper surface of the kettle (1), an output shaft of the motor (4) being fixedly connected to a main bevel gear (5), a rotating opening being provided on the upper surface of the kettle (1), an upper end of the rotating rod (2) extending out of the upper surface of the kettle (1) through the rotating opening and being fixedly connected to a secondary bevel gear (6), a sampling mechanism being provided on the right side surface of the kettle (1), and a preheating mechanism being provided on the left side surface of the kettle (1); The sampling mechanism comprises a negative pressure pump (7) fixedly mounted on the right side surface of the kettle body (1); a sampling channel (8) extending from the upper end of the rotating rod (2) to the lower end; an extraction tube (9) is rotatably connected to the upper end of the rotating rod (2); an end of the extraction tube (9) away from the rotating rod (2) is fixedly connected to a suction end of the negative pressure pump (7) with a mounting cover (10); and a collecting bottle (11) is threadedly connected to the inner wall of the mounting cover (10).

2. The nitrile latex polymerization reaction kettle that is convenient for accurate temperature control according to claim 1, characterized in that: The main bevel gear (5) and the secondary bevel gear (6) are meshed with each other, and the output shaft of the motor (4) is transmission-connected to the rotating rod (2) via the main bevel gear (5) and the secondary bevel gear (6).

3. The nitrile latex polymerization reaction kettle that is convenient for accurate temperature control according to claim 1, characterized in that: A temperature sensor (12) and a discharge pipe (13) are respectively provided on the right side surface of the kettle body (1).

4. The nitrile latex polymerization reaction kettle that is convenient for accurate temperature control according to claim 3, characterized in that: A manual valve is provided on the surface of the discharge pipe (13), and an electric valve (14) is provided on the surface of the extraction pipe (9).

5. The nitrile latex polymerization reaction kettle that is convenient for accurate temperature control according to claim 1, characterized in that: The preheating mechanism comprises a sealing box (15) fixedly mounted on the left side surface of the kettle body (1); a ventilation pipe (16) extending into the interior of the sealing box (15) is arranged on the upper surface of the kettle body (1); a spiral temperature conducting pipe (17) is fixedly mounted inside the sealing box (15) via a bracket; and a feed pipe (18) fixedly connected to the end of the spiral temperature conducting pipe (17) is arranged on the left side surface of the sealing box (15).

6. The nitrile latex polymerization reaction kettle that is convenient for accurate temperature control according to claim 5, characterized in that: The spiral temperature conducting tube (17) is made of a temperature conducting copper material, and one end of the spiral temperature conducting tube (17) away from the feed tube (18) extends to the interior of the kettle body (1).

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