CN218530900U - Hydrolysis reactor - Google Patents

Abstract

The utility model relates to a chemical production technical field, concretely relates to hydrolysis reactor. Comprises a reaction kettle, a feeding structure, a stirring structure and a discharge hole, wherein the reaction kettle is provided with a cavity; the feeding structure is arranged on the reaction kettle and is communicated with the cavity; the stirring structure is fixedly arranged on the reaction kettle, extends into the cavity and is arranged corresponding to the outlet of the feeding structure; the discharge port is arranged on the reaction kettle. After multiple material entered into reation kettle through the feeding structure, the rabbling mechanism started, started rapid mixing, can be in the twinkling of an eye with reaction material dispersion mixture to improve the speed of reaction, greatly increased the area of contact of different materials, improved reaction efficiency, shortened reaction time, can effectively solve among the prior art venturi three-way type reactor raw materials and distribute inhomogeneously, lead to reaction efficiency lower, be unfavorable for the installation of equipment and the problem of overhauing and maintaining.

Description

Hydrolysis reactor

Technical Field

The utility model relates to a chemical production technical field, concretely relates to hydrolysis reactor.

Background

Polysiloxanes are important intermediates in the silicone industry, which are important raw materials for the preparation of various silicone products. The production of polysiloxanes by hydrolysis of dimethyldichlorosilane with concentrated hydrochloric acid is currently the predominant method for the production of polysiloxanes.

In the prior art, in order to ensure complete reaction, a Venturi three-way reactor is generally used, and the raw materials of the reactor are unevenly distributed during reaction, so that the reaction efficiency is low.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the defect that the reaction time distributes unevenly among the prior art, and reaction efficiency is lower to provide an even and efficient hydrolysis reactor of hydrolysising of distribution.

In order to solve the above problem, the utility model provides a hydrolysis reactor, include:

the reaction kettle is provided with a cavity;

the feeding structure is arranged on the reaction kettle and communicated with the cavity, the feeding structure comprises a first feeding pipe and a second feeding pipe, the first feeding pipe is arranged at the bottom of the reaction kettle, the second feeding pipe is arranged at the bottom of the reaction kettle, and the second feeding pipe is at least partially sleeved with the first feeding pipe at a position close to the outlet and extends to the inside of the reaction kettle;

the stirring structure is fixedly arranged on the reaction kettle, extends into the cavity and is arranged corresponding to the outlet of the feeding structure;

and the discharge port is arranged on the reaction kettle.

Optionally, the feeding structure is arranged at the bottom of the reaction kettle, the discharge port is arranged at the top of the reaction kettle, and one end of the stirring structure is fixed at the top of the reaction kettle.

Optionally, the setting of buckling of import department of first inlet pipe, the second inlet pipe is the straight tube, and the position cover that first inlet pipe is close to the export is established in the second inlet pipe outside.

Optionally, the bottom of the reaction kettle is further provided with a third feeding pipe.

Optionally, the pipe diameter size ratio of the second inlet pipe and the third inlet pipe is 1:2-1:5.

Optionally, the first feeding pipe, the second feeding pipe and the third feeding pipe are provided with control valves and/or flow meters.

Optionally, the stirring structure comprises:

the driving motor is arranged at the top end of the reaction kettle;

the rotating shaft is fixedly connected with a fixed shaft of the driving motor;

and the stirring pieces are arranged on two sides and/or the bottom end of the rotating shaft and are suitable for stirring the raw materials in the reaction kettle.

Optionally, the outlets of the first feeding pipe and the second feeding pipe are 30-120mm away from the bottom of the stirring structure.

Optionally, the rotation speed of the stirring structure is 160-1500rpm.

The utility model has the advantages of it is following:

1. the utility model provides a pair of hydrolysis reactor, reation kettle are hydrolysis reaction's main place, and the feeding structure is fixed on reation kettle, and extend to in the cavity, pour into multiple material into reation kettle through the feeding structure in, still be provided with rabbling mechanism on the reation kettle, after multiple material enters into reation kettle through the feeding structure, rabbling mechanism starts, begin rapid mixing, can mix reaction material dispersion in the twinkling of an eye, thereby improve the speed of reaction, greatly increased the area of contact between different materials, improved reaction efficiency, shortened reaction time, because of the dispersion is inhomogeneous when effectively solving dimethyl dichlorosilane and hydrolysising, thereby dwell time is wayward leads to the increase of product viscosity, the too wide scheduling problem of molecular chain section distribution, and this device simple structure, small, do not need extra feeding mixing arrangement, the installation, overhaul, dismantle conveniently, and is with low costs.

2. The utility model provides a pair of hydrolysis reactor, feeding structure include first inlet pipe and second inlet pipe, and the crossing part of second inlet pipe and first inlet pipe cup joints together, and two kinds of materials can be mixed at the mouth of pipe, guarantee at the accurate ratio of material contact position, avoid reducing the efficiency of reaction because two pipelines separately set up.

3. The utility model provides a pair of hydrolysis reactor, wherein first inlet pipe is buckled in import department, and the second inlet pipe is the straight tube, and the diameter of first inlet pipe is greater than the diameter of second inlet pipe, and the import setting of first inlet pipe and second inlet pipe can guarantee that the feeding is convenient in the different sides, can not feed by mistake and expect.

4. The utility model provides a hydrolysis reactor, when this device needs to react, can input first material through first inlet pipe, second material is input to second inlet pipe and third feed pipe, and the mouth of pipe size of second inlet pipe and third feed pipe is different, and the feed rate is also different, and the position that third feed pipe set up should be close to first feed pipe mouth as far as possible, uses when the reactor is first operation to improve the defeated material speed; subsequent second materials all get into from the second inlet pipe, be provided with at least one of control valve and flowmeter on first inlet pipe, second inlet pipe and the third inlet pipe, can accurate control feeding volume, guarantee hydrolysis reaction's efficiency.

5. The utility model provides a pair of hydrolysis reactor sets up driving motor in reation kettle's top, and driving motor drives the pivot and rotates when starting to drive the stirring piece that pivot both sides or bottom set up, stir the raw materials that enters into in reation kettle, the exit distance of first inlet pipe and second inlet pipe stir structure bottom 30-120mm, the ejection of compact with the feeding structure export that guarantees to be timely stirs the emulsification. The rotating speed of the stirring structure is 160-1500rpm, the rotating speed is very high, the two-phase reaction raw materials can be stirred instantly to be emulsified, and the emulsion is in a liquid drop of 0.1-10 um.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 shows a schematic structural diagram of a hydrolysis reactor provided by the present invention.

Description of reference numerals:

1. a first feed tube; 2. a second feed tube; 3. a feed structure; 4. a third feed pipe; 5. A reaction kettle; 6. a rotating shaft; 7. and (4) a discharge port.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

This example provides a hydrolysis reactor for the hydrolysis of dimethyldichlorosilane and concentrated hydrochloric acid to produce polysiloxane.

In one embodiment, as shown in fig. 1, a hydrolysis reactor comprises: reaction kettle 5, feeding structure, stirring structure and discharge gate. Wherein, the reaction kettle 5 is provided with a cavity; the feeding structure is arranged on the reaction kettle 5 and is communicated with the cavity; the stirring structure is fixedly arranged on the reaction kettle 5, extends into the cavity and is arranged corresponding to the outlet of the feeding structure; the discharge port is arranged on the reaction kettle 5.

Specifically, reation kettle 5 is hydrolysis's main place, and the feeding structure is fixed on reation kettle 5, and extends to in the cavity, pour into dimethyl dichlorosilane and concentrated hydrochloric acid into reation kettle 5 through the feeding structure in, still be provided with stirring structure on reation kettle 5, after two kinds of materials enter into reation kettle 5 through the feeding structure, stirring structure starts, begin rapid mixing, can mix reaction material dispersion in the twinkling of an eye, thereby improve the speed of reaction, greatly increased the area of contact of dimethyl dichlorosilane and concentrated hydrochloric acid, the reaction efficiency is improved, reaction time has been shortened, thereby can effectively solve when dimethyl dichlorosilane hydrolysises because of the dispersion inhomogeneous product viscosity increase that leads to, the too wide scheduling problem of molecular chain section distribution, and this device simple structure, small, do not need extra feeding mixing arrangement, the installation, overhaul, dismantle conveniently, and is with low costs.

On the basis of the above embodiment, in a preferred embodiment, the feeding structure is arranged at the bottom of the reaction kettle 5, the discharging port is arranged at the top of the reaction kettle 5, and one end of the stirring structure is fixed at the top of the reaction kettle 5.

Wherein, feeding structure can set up in arbitrary side of 5 bottoms of reation kettle, and the discharge gate can set up in 5 top head departments of reation kettle, also can set up in the other positions at the top.

On the basis of the above embodiment, in a preferred embodiment, the feeding structure comprises: the device comprises a first feeding pipe 1 and a second feeding pipe 2, wherein the first feeding pipe 1 is arranged at the bottom of a reaction kettle 5; second inlet pipe 2 sets up in reation kettle 5's bottom, and second inlet pipe 2 cup joints with first inlet pipe 1 near the position of export at least partially, and all extends to reation kettle 5's inside.

Specifically, first inlet pipe 1 is used for inputing dimethyldichlorosilane, and second inlet pipe 2 is used for inputing concentrated hydrochloric acid, and the crossing part of second inlet pipe 2 and first inlet pipe 1 cup joints together, and dimethyldichlorosilane and concentrated hydrochloric acid can be mixed at the mouth of pipe, guarantee at the accurate ratio of material contact position, avoid reducing the efficiency of reaction because two pipelines are separately.

On the basis of the above embodiment, in a preferred embodiment, the inlet of the first feeding pipe 1 is bent, the second feeding pipe 2 is a straight pipe, and the position of the first feeding pipe 1 near the outlet is sleeved on the outer side of the second feeding pipe 2.

Wherein first inlet pipe 1 is buckled in import department, and second inlet pipe 2 is the straight tube, and the diameter of first inlet pipe 1 is greater than the diameter of second inlet pipe 2, and the import of first inlet pipe 1 and second inlet pipe 2 does not set up and can guarantee the feeding convenience in one side, can not advance the mistake and expect.

As an alternative embodiment, the first feeding pipe 1 and the second feeding pipe 2 are both straight pipes, and the first feeding pipe 1 is sleeved outside the second feeding pipe 2.

On the basis of the above embodiments, in a preferred embodiment, the bottom of the reaction kettle 5 is further provided with a third feeding pipe 4.

On the basis of the above embodiment, in a preferred embodiment, the pipe diameter size ratio of the second feeding pipe 2 to the third feeding pipe 4 is 1:2-1:5.

specifically, dimethyldichlorosilane can be input through the first feeding pipe 1, concentrated hydrochloric acid is input through the second feeding pipe 2 and the third feeding pipe 4, the sizes of pipe orifices of the second feeding pipe 2 and the third feeding pipe 4 are different, the feeding speeds are also different, the position where the third feeding pipe 4 is arranged is close to the opening of the first feeding pipe 1 as far as possible, the reactor is used during initial operation, subsequent concentrated hydrochloric acid enters from the second feeding pipe 2, and the first feeding pipe 1, the second feeding pipe 2 and the third feeding pipe 4 are provided with a control valve and a flowmeter, so that the feeding amount can be accurately controlled, and the efficiency of hydrolysis reaction is ensured.

Wherein, the first feed pipe 1, the second feed pipe 2 and the third feed pipe 4 can be provided with only a control valve or only a flowmeter, and the purpose of controlling the feed quantity can be achieved.

In addition to the above embodiments, in a preferred embodiment, the stirring structure includes:

the driving motor is arranged at the top end of the reaction kettle 5;

the rotating shaft 6 is fixedly connected with a fixed shaft of the driving motor;

and the stirring pieces are arranged on two sides and/or the bottom end of the rotating shaft 6 and are suitable for stirring the raw materials in the reaction kettle 5.

On the basis of the above embodiment, in a preferred embodiment, the outlets of the first feeding pipe 1 and the second feeding pipe 2 are 30-120mm away from the bottom of the stirring structure.

In a preferred embodiment, the rotation speed of the stirring structure is 160-1500rpm on the basis of the above embodiments.

Specifically, set up driving motor in reation kettle 5's top, driving motor when starting, drives pivot 6 and rotates to drive the stirring piece that 6 both sides of pivot or bottom set up, stir the raw materials that enters into reation kettle 5 in, the exit distance of first inlet pipe 1 and second inlet pipe 2 stirring structure bottom 30-120mm guarantees that can be timely stirs the ejection of compact of feeding structure export and emulsifies. The rotating speed of the stirring structure is 160-1500rpm, the rotating speed is very high, the two-phase reaction raw materials can be stirred instantly to be emulsified, and the emulsion is in a liquid drop of 0.1-10 um.

The hydrolysis of dimethyldichlorosilane and concentrated hydrochloric acid using the hydrolysis reactor provided in example 1 was carried out as follows:

dimethyl dichlorosilane and hydrochloric acid with the concentration of 43% are mixed according to the mass ratio of 1:3 (realized by a control valve and a flow meter which are arranged on the feeding pipes of the dimethyldichlorosilane and the hydrochloric acid) are proportionally fed into a reaction kettle 5, the reaction temperature is controlled to be 25-40 ℃, and the pressure is controlled to be 0.2-0.6 Mpa. The dimethyl dichlorosilane is hydrolyzed rapidly, HCl generated in the reaction is dissolved in hydrochloric acid under the action of pressure, the obtained reaction liquid is extracted from a discharge hole 7, and the hydrolysis reaction efficiency is up to 98%.

Dimethyldichlorosilane and 43% hydrochloric acid in a mass ratio of 1:4 (realized by a control valve and a flow meter which are arranged on the feeding pipes of the dimethyldichlorosilane and the hydrochloric acid) are proportionally fed into the reaction kettle, the reaction temperature is controlled to be 25-40 ℃, and the pressure is controlled to be 0.2-0.6 Mpa. The dimethyl dichlorosilane is hydrolyzed rapidly, HCl generated in the reaction is dissolved in hydrochloric acid under the action of pressure, the obtained reaction liquid is extracted from a discharge hole 7, and the hydrolysis reaction efficiency is up to more than 99%.

Dimethyl dichlorosilane and 43% hydrochloric acid are mixed according to a mass ratio of 1:5 (realized by a control valve and a flow meter which are arranged on the feeding pipes of the dimethyldichlorosilane and the hydrochloric acid) are proportionally fed into the reaction kettle, the reaction temperature is controlled to be 25-40 ℃, and the pressure is controlled to be 0.2-0.6 Mpa. The dimethyl dichlorosilane is hydrolyzed rapidly, HCl generated in the reaction is dissolved in hydrochloric acid under the action of pressure, the obtained reaction liquid is extracted from a discharge hole 7, and the hydrolysis reaction efficiency is up to more than 98%.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (9)

1. A hydrolysis reactor, comprising:

a reaction kettle (5) with a cavity;

the feeding structure is arranged on the reaction kettle (5) and is communicated with the cavity; the feeding structure comprises a first feeding pipe (1) and a second feeding pipe (2), the first feeding pipe (1) is arranged at the bottom of the reaction kettle (5), the second feeding pipe (2) is arranged at the bottom of the reaction kettle (5), and the second feeding pipe (2) is at least partially sleeved with the first feeding pipe (1) at a position close to the outlet and extends to the inside of the reaction kettle (5);

the stirring structure is fixedly arranged on the reaction kettle (5), extends into the cavity and is arranged corresponding to the outlet of the feeding structure;

a discharge port (7) arranged on the reaction kettle (5).

2. Hydrolysis reactor according to claim 1, wherein said feeding structure is arranged at the bottom of the reaction vessel (5), said discharging port (7) is arranged at the top of the reaction vessel (5), and one end of said stirring structure is fixed at the top of the reaction vessel (5).

3. The hydrolysis reactor according to claim 1, wherein the inlet of the first feeding pipe (1) is bent, the second feeding pipe (2) is a straight pipe, and the position of the first feeding pipe (1) close to the outlet is sleeved outside the second feeding pipe (2).

4. Hydrolysis reactor according to claim 1, characterized in that the bottom of the reaction vessel (5) is further provided with a third feed pipe (4).

5. Hydrolysis reactor according to claim 4, characterized in that the second (2) and third (4) feeding pipes have a pipe diameter to size ratio of 1:2-1:5.

6. hydrolysis reactor according to claim 4, characterized in that the first (1), second (2) and third (4) feeding pipes are provided with control valves and/or flow meters.

7. Hydrolysis reactor according to any of claims 2-6, characterized in that the stirring structure comprises:

the driving motor is arranged at the top end of the reaction kettle (5);

the rotating shaft (6) is fixedly connected with a fixed shaft of the driving motor;

and the stirring pieces are arranged on two sides and/or the bottom end of the rotating shaft (6) and are suitable for stirring the raw materials in the reaction kettle (5).

8. Hydrolysis reactor according to any of claims 3 to 6, characterized in that the outlets of the first (1) and second (2) feeding pipes are located 30-120mm from the bottom of the stirring structure.

9. Hydrolysis reactor according to any of claims 1-6, characterized in that the rotation speed of the stirring structure is 160-1500rpm.

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