CN214716462U - Reaction device - Google Patents

Abstract

The utility model discloses a reaction device, including reation kettle, reation kettle includes top, bottom and connects the lateral wall between top and bottom, and the top is provided with first feed inlet, and the lower extreme department of lateral wall is equipped with the second feed inlet. The utility model discloses a lower extreme department at traditional waterborne acrylic acid emulsion reation kettle's lateral wall sets up the second feed inlet below the liquid level promptly, the preemulsion lets in at the second feed inlet, at the first feed inlet dropwise add initiating agent at top, the dropwise add in-process has avoided initiating agent and preemulsion too early contact in liquid level department, it is too much to have avoided the slagging-off that local concentration too high reaction acutely arouses, be favorable to improving the batch stability of product, also not too high requirement to reation kettle's stirring.

Description

Reaction device

Technical Field

The utility model relates to a waterborne acrylic resin emulsion production facility, in particular to a reaction unit for synthesizing waterborne acrylic emulsion.

Background

The water-based acrylic emulsion is an important polymer, reduces VOC (volatile organic compounds) emission by using water as a solvent, and can be used in the fields of coatings, printing ink, adhesives and the like. The conventional synthesis methods of the water-based acrylic emulsion comprise a one-step method and a starvation feeding method, wherein the starvation feeding method is that an initiator and a monomer pre-emulsion are simultaneously dripped into a reaction kettle at a constant speed within a specified time, and the mixture is reacted into the emulsion in the reaction kettle. The traditional method is to drop initiator and monomer pre-emulsion into a reaction kettle by different pipelines at the top of the reaction kettle, and then react the initiator and monomer pre-emulsion into emulsion in the reaction kettle by means of gravity or a pump body. In this method, the initiator and the monomer pre-emulsion come into contact prematurely, and polymerization may occur before the initiator and the monomer pre-emulsion are uniformly mixed, so that the stability of the produced product batches is poor. The method can also be solved by increasing the stirring speed or adjusting the dosage of the emulsifier in the formula, but too high stirring speed can also influence the polymerization reaction speed, and too much emulsifier can influence the water resistance of the finished product and the quality of the product.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a reaction unit for aqueous acrylic acid emulsion is synthetic can avoid initiating agent and monomer to pre-emulsify too early contact, reduces the sediment volume and the emulsifier use amount.

According to the utility model discloses a reaction unit of first aspect embodiment, including reation kettle, reation kettle include top, bottom and connect in the top with lateral wall between the bottom, the top is provided with first feed inlet, the lower extreme department of lateral wall is equipped with the second feed inlet.

According to the utility model discloses reaction unit has following beneficial effect at least: the lower extreme department through the lateral wall at traditional waterborne acrylic acid emulsion reation kettle is that set up the second feed inlet below the liquid level, and the preemulsion lets in at the second feed inlet, at the first feed inlet dropwise add initiating agent at top, and the dropwise add in-process has avoided initiating agent and preemulsion too early contact in liquid level department, and it is too much to have avoided the slagging-off that local concentration too high reaction violently arouses, is favorable to improving the batch stability of product, also does not have too high requirement to reation kettle's stirring.

According to the utility model discloses a some embodiments, first feed inlet is connected with the measuring pump.

According to some embodiments of the invention, the second feed inlet is connected with a rotor pump.

According to some embodiments of the utility model, reation kettle's outer wall is equipped with temperature regulating medium intermediate layer cover.

According to some embodiments of the present invention, the reaction kettle is further provided with a condensing and returning pipe at the top thereof.

According to the utility model discloses a some embodiments still include emulsion tank and distributor, the upper portion of distributor is equipped with a plurality of pan feeding mouth, and the bottom is equipped with a discharge gate, the emulsion tank with the second feed inlet is connected, the emulsion tank is equipped with the monomer feed inlet, the monomer feed inlet with the discharge gate of distributor is connected.

According to some embodiments of the utility model, the collecting device is the material pipe that the slope set up, a plurality of the pan feeding mouth set up in the upper portion of material pipe just follows the axial interval of material pipe sets up.

According to some embodiments of the utility model, the collecting device is the material pipe of vertical setting, a plurality of the pan feeding mouth set up in the upper portion of material pipe just follows the circumference setting of material pipe.

According to the utility model discloses a some embodiments, be equipped with the ware of weighing on the emulsification tank, the monomer feed inlet is equipped with the proportional valve, the ware of weighing is connected with PLC's input electricity, the proportional valve is connected with PLC's output electricity.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic overall structure diagram of an embodiment of the present invention;

fig. 2 is a schematic view of the overall structure of another embodiment of the present invention.

The system comprises a reaction kettle 100, a first feed inlet 110, a second feed inlet 120, a metering pump 200, a rotor pump 300, a temperature regulating medium interlayer sleeve 400, a condensate return pipe 500, an emulsifying tank 600, a distributor 700, a weighing device 800 and a proportional valve 900.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Referring to fig. 1, the reaction apparatus includes a reaction kettle 100, the reaction kettle 100 includes a top, a bottom and a side wall connected between the top and the bottom, the top is provided with a first feeding hole 110, and the lower end of the side wall is provided with a second feeding hole 120. When preparing the water-based acrylic emulsion, the reaction kettle 100 needs to be added with water, an emulsifier, a buffering agent and other materials to form a mixed solution with a certain height, the second feed port 120 is positioned below the liquid level, the pre-emulsion is introduced into the second feed port 120, the pre-emulsion is uniformly dispersed in the solution through the stirring of the stirring paddle, the initiator is dropwise added into the first feed port 110 at the top, the premature contact of the initiator and the pre-emulsion at the liquid level is avoided in the dropwise adding process, the excessive slag formation caused by the violent reaction of the overhigh local concentration is avoided, the improvement of the batch stability of the product is facilitated, and the stirring of the reaction kettle is not required to be overhigh.

In some embodiments, the first feeding port 110 is connected with the metering pump 200, the metering pump 200 has superior performance, is absolutely leak-free, has high safety performance, is accurate in metering and conveying, can be adjusted at will within a range from zero to a maximum rated value, can be selected at will within a range from normal pressure to a maximum allowable range, can be adjusted manually and in a frequency conversion manner according to process requirements, can also be controlled remotely and automatically by a computer, and ensures that the reaction process is controllable.

In some embodiments, the rotor pump 300 is connected to the second feed port 120, so that the input flow rate can be precisely controlled, the self-priming capability is strong, the rotation speed is low, and the delivered pre-emulsion can be smoothly delivered without damaging the components.

In some embodiments, the outer wall of the reaction vessel 100 is provided with a temperature regulating medium jacket 400, and the reaction vessel 100 can be heated by introducing steam.

In some embodiments, a condensate return pipe 500 is further disposed at the top of the reaction vessel 100, so that chemical vapor generated in the reaction can be condensed and returned to the reaction vessel 100.

In some of them embodiments, still include emulsion tank 600 and distributor 700, the upper portion of distributor is equipped with a plurality of pan feeding mouth, and the bottom is equipped with a discharge gate, and the emulsion tank is connected with the second feed inlet, and the emulsion tank is equipped with the monomer feed inlet, and the monomer feed inlet is connected with the discharge gate of distributor, and the monomer is added from each pan feeding mouth, and the discharge gate through the distributor falls in the monomer feed inlet of emulsion tank, need not to set up a plurality of pan feeding mouths on the emulsion tank like this, only set up one can.

In some embodiments, the distributor 700 is an inclined material pipe, a plurality of material inlets are disposed at the upper portion of the material pipe and are spaced along the axial direction of the material pipe, and the material flows from the material inlets to the material outlet at the bottom along the inclined material pipe under the action of gravity.

In some embodiments, referring to fig. 2, the distributor 700 is a vertically arranged material pipe, and the plurality of material inlets are arranged at the upper part of the material pipe and arranged along the circumference of the material pipe, and the vertically arranged material pipe can reduce the residue of the material on the pipe wall.

In some of these embodiments, be equipped with weighing device 800 on the emulsion tank 600, the monomer feed inlet is equipped with proportional valve 900, and weighing device 800 is connected with PLC's input electricity, and proportional valve 900 is connected with PLC's output electricity, and weighing device 800 gathers reation kettle weight and sends PLC, and PLC is according to the weight control proportional valve 900 of material, and then realizes automatic ration reinforced.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (9)

1. The utility model provides a reaction unit, characterized in that, includes reation kettle (100), reation kettle (100) include top, bottom and connect in the top with lateral wall between the bottom, the top is provided with first feed inlet (110), the lower extreme department of lateral wall is equipped with second feed inlet (120).

2. The reactor apparatus according to claim 1, wherein a metering pump (200) is connected to the first feed opening (110).

3. The reactor apparatus according to claim 1, wherein a rotor pump (300) is connected to the second inlet (120).

4. The reaction device according to claim 1, wherein the outer wall of the reaction kettle (100) is provided with a temperature regulating medium interlayer sleeve (400).

5. The reactor apparatus as claimed in claim 1, wherein the top of the reaction vessel (100) is further provided with a condensate return pipe (500).

6. The reaction device according to claim 1, further comprising an emulsion tank (600) and a distributor (700), wherein a plurality of feeding ports are formed in the upper portion of the distributor (700), a discharging port is formed in the bottom of the distributor, the emulsion tank (600) is connected with the second feeding port (120), a monomer feeding port is formed in the emulsion tank (600), and the monomer feeding port is connected with the discharging port of the distributor (700).

7. The reaction device according to claim 6, wherein the collecting device (700) is an inclined material pipe, and a plurality of the material inlet openings are arranged at the upper part of the material pipe and are arranged at intervals along the axial direction of the material pipe.

8. The reaction device according to claim 6, wherein the collecting device (700) is a vertically arranged material pipe, and a plurality of the feeding ports are arranged at the upper part of the material pipe and along the circumferential direction of the material pipe.

9. The reaction device according to claim 6, wherein a weigher (800) is arranged on the emulsifying tank (600), the monomer feed port is provided with a proportional valve (900), the weigher (800) is electrically connected with an input end of the PLC, and the proportional valve (900) is electrically connected with an output end of the PLC.

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