CN202105652U - Novel multi-phase stirring reactor - Google Patents

Abstract

The utility model relates to a novel multiphase stirring reactor, which comprises a cylinder body, an upper seal head and a lower seal head. A stirring shaft is arranged in the center of the cylinder body. The mechanism is located at the lower part of the lower head and is connected with the stirring shaft. Its characteristics are: the stirring shaft is equipped with a main stirrer and a secondary stirrer, and the cylinder is equipped with a heat exchange plate composed of multiple heat exchange plates. The outer wall of the cylinder is provided with a heat exchange medium inlet and a material outlet, the outer wall of the upper head is provided with a material inlet and a heat exchange medium outlet, and the outer wall of the lower head is provided with a discharge port and a gas inlet. The reactor enables the axial flow and radial flow of reactants to exist at the same time, which can better mix the materials quickly and evenly. The heat exchange plates are evenly distributed around the central axis of the cylinder at a certain angle in a radial manner, ensuring that the reactor Medium temperature balance, simple structure and enhanced heat transfer.

Description

A Novel Multiphase Stirred Reactor

technical field

The utility model relates to chemical equipment, in particular to a multi-phase reactor with exothermic or endothermic chemical reactions applied in the chemical industry.

Background technique

In chemical reactions, heterogeneous reactions with exothermic or endothermic are more common. In order to better control the reaction temperature, the development of heat exchange technology for heterogeneous reactors with exothermic or endothermic has been attracting attention. . For example, the development and application of pure radial flow isothermal reactor or pure axial flow isothermal reactor. In a multiphase reactor with exothermic or endothermic reactions, the flow state of the fluid has a great influence on the speed and degree of mixing of the various phases in the reactor, thus restricting the further improvement of the reaction rate of the multiphase reaction, which is also The shortcomings of pure radial flow isothermal reactors or pure axial flow isothermal reactors; at the same time, due to the exothermic or endothermic phenomena in the reaction process, the excess heat in the reaction process should be removed or supplemented in time. The resulting plate-shell isothermal reactor has been applied, and has achieved better results than the coil heat exchanger inside the reactor. At present, the heat exchange plates used in the plate-shell isothermal reactor are often solid, or fixed on the solid plate in some way. Although the heat exchange efficiency of the multiphase reactor developed with solid heat exchange plates as the heat exchange unit is greatly improved, it also restricts the flow direction of the fluid in the reactor because the heat exchange plates used are solid. Either radial flow or axial flow limits the mixing speed and degree of mixing between the phases, which is not conducive to this type of reactor to play its greater role.

Contents of the invention

The purpose of this utility model is to solve the problem that fluid flow is restricted due to poor structure of current multi-phase thermal reactors, resulting in uneven temperature zones, and to provide a method suitable for exothermic or endothermic reactions that can better use The material is mixed quickly and evenly, and it is a multi-phase stirred reactor that can better ensure the uniform temperature distribution in the reactor.

In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a novel multiphase stirred reactor, including a cylinder (6), an upper head (3) and a lower head (8) through the flange and the cylinder respectively. (6) connection, a stirring shaft (19) is provided at the center of the cylinder body (6), the transmission mechanism (1) is located on the upper part of the upper head (3) and is connected with the stirring shaft (19), and the supporting mechanism (11) is provided with The lower part of the lower head (8) is connected to the stirring shaft (19), and is characterized in that the stirring shaft (19) is provided with at least two stirrers, namely the main stirrer (9) and the auxiliary stirrer (15), the cylinder (6) is provided with a heat exchanger group composed of a plurality of heat exchange plates (5), a heat exchange medium inlet annular pipe (16) and a heat exchange medium outlet annular pipe (18), The heat exchange medium inlet annular pipe (16) communicates with the heat exchange plate (5) through the inlet connection channel (4a), and the heat exchange medium outlet annular pipe (18) communicates with the heat exchange plate (5) through the outlet connection channel (20a). ) are connected, the outer wall of the cylinder (6) is provided with a heat exchange medium inlet (4) and a material outlet (17), and the outer wall of the upper head (3) is provided with a material inlet (2) and a heat exchange medium outlet (20) , the outer wall of the lower head (8) is provided with a discharge port (10) and a gas inlet (12), and the gas distributor (13) located under the main agitator (9) communicates with the gas inlet (12).

The shape of the heat exchange plates (5) has a specific radius of curvature, and the heat exchange plates (5) are evenly distributed around the central axis of the cylinder (6) in a radial manner at a certain angle α.

The distribution angle α of the heat exchange plates (5) is 20°-60°.

The heat exchange plate (5) is provided with at least two sets of heat exchange medium channel groups (25), and each heat exchange medium channel group (25) is provided with 2-3 heat exchange medium channels (24).

The cross-section of the heat exchange medium channel (24) is rhombus.

Gaps (23) are provided between the heat exchange medium channel groups (25).

The beneficial effects of the utility model are: due to the main agitator and the auxiliary agitator, the axial flow and the radial flow of the reactants exist at the same time, and the materials can be mixed quickly and evenly; the heat exchange plate radiates at a certain angle The shape is evenly distributed around the central axis of the cylinder, which ensures the temperature balance in the reactor, and has the characteristics of simple structure and enhanced heat transfer.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is one of the schematic diagrams of the layout of the heat exchange plates of the present invention;

Figure 3 is the second schematic diagram of the layout of the heat exchange plates of the present invention;

Fig. 4 is a schematic front view of the heat exchange plate of the present invention;

Fig. 5 is a schematic diagram of A direction of Fig. 4;

Fig. 6 is a B-B sectional view of Fig. 4 .

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Embodiment 1: See Fig. 1, 2, 3, a kind of novel heterogeneous stirring reactor, comprises cylinder body 6, upper head 3 and lower head 8 are connected with cylinder body 6 through flange respectively, and cylinder body 6 center is set There is a stirring shaft 19, the transmission mechanism 1 is arranged on the top of the upper sealing head 3 and is connected with the stirring shaft 19, and the support mechanism 11 is arranged at the bottom of the lower sealing head 8 and is connected with the stirring shaft 19, and its characteristics are: the stirring There are two agitators on the shaft 19, namely the main agitator 9 and the auxiliary agitator 15, and the cylinder 6 is provided with a heat exchanger group composed of a plurality of heat exchange plates 5, and a heat exchange medium inlet annular pipe 16. And the heat exchange medium outlet annular pipe 18, the heat exchange medium inlet annular pipe 16 communicates with the heat exchange plate 5 through the inlet connection channel 4a, and the heat exchange medium outlet annular pipe 18 communicates with the heat exchange plate 5 through the outlet connection channel 20a , the outer wall of cylinder 6 is provided with heat exchange medium inlet 4 and material outlet 17, the outer wall of upper head 3 is provided with material inlet 2 and heat exchange medium outlet 20, and the outer wall of lower head 8 is provided with discharge port 10 and gas The gas inlet 12 is communicated with the gas distributor 13 arranged under the main agitator 9 .

The shape of the heat exchange plates 5 has a specific radius of curvature, and the heat exchange plates 5 are evenly distributed around the central axis of the cylinder body 6 in a radial manner at a certain angle α.

The distribution angle α of the heat exchange plates 5 is 20°-60°.

The heat exchange plate 5 is provided with two sets of heat exchange medium channel groups 25 , and each heat exchange medium channel group 25 is provided with two heat exchange medium channels 24 .

The cross-section of the heat exchange medium channel 24 is rhombus.

Gaps 23 are provided between the heat exchange medium channel groups 25 .

The function of the main agitator 9 is to make the fluid flow radially along the cylinder 6 to form a radial flow; while the auxiliary agitator 15 flows downward along the axis of the cylinder 6 to form an axial flow. The heat exchange medium enters the heat exchange medium inlet annular pipe 16 in the cylinder 6 through the heat exchange medium inlet 4, and is further distributed to each heat exchange plate 5, and the heat exchange medium passes through each heat exchange plate 5 along the The axis of the cylinder 6 flows downwards, deflects radially at the bottom of the heat exchange plate 5 and flows upward along the axial direction of the cylinder 6, and enters the heat exchange medium outlet annular pipe 18 above the heat exchange plate 5, Then it flows out of the reactor through the heat exchange medium outlet 20 .

The fixing method of the heat exchange plate 5 in the cylinder body 6 is that the upper end is fixed by two parts, one is the heat exchange medium inlet annular pipe 16 and the heat exchange medium outlet annular pipe 18 as the fixing method; the other is the heat exchange plate As far as the radial direction of the cylinder is concerned, the outer edge of the sheet 5 is fixed by the heat exchange plate outer edge fixing ring 22 fixed on the inner wall of the cylinder body 6 by the fixing member 14, and its inner edge is fixed by the heat exchange plate inner edge fixing ring 22. 21 for fixing. The lower end of the heat exchange plate 5 is fixed by the above-mentioned "second" method, and at the lower end, the fixed ring 21 of the inner edge of the heat exchange plate passes through the rib plate 7 and the outer edge fixed ring 22 of the heat exchange plate. connected. This fixing method of the heat exchange plate 5 can enhance its strength and better meet the strong radial and axial flow of the fluid caused by the existence of the agitator.

A gas inlet 12 is designed at the lower head 8 of the cylinder 6, and the gas can enter the gas distributor 13 located at the lower part of the reactor and below the main agitator 9 through the gas inlet 12, thereby entering the reactor.

See Figures 2 and 3, the radial arrangement of the heat exchange plate 5 in the reactor cylinder 6, the inner edge of the heat exchange plate 5 is in contact with the inner edge fixed ring 21, and the heat exchange plate 5 passing through the contact point The above tangent forms an angle α with the diameter of the cylinder 6 passing through the contact point, and the angle α can be adjusted between 20° and 60°; the direction of the angle α is consistent with the radial flow direction of the fluid in the cylinder 6 .

As shown in Figure 4, the heat exchange medium enters the heat exchange plate 5 through the inlet connection channel 4a, and flows out through the outlet connection channel 20a. The figure shows a flow mode (U shape) and its flow direction.

As shown in Figures 5 and 6, the heat exchange plate 5 is provided with two sets of heat exchange medium channel groups 25, each heat exchange medium channel group 25 contains two heat exchange medium channels 24, and the cross section of the heat exchange medium channel 24 is diamond-shaped . The heat exchange plate 5 leaves a certain gap 23 between the two heat exchange medium channel groups 25, the purpose is to allow the materials in the reactor to pass through, reduce the flow resistance in the reactor cylinder 6, and help the cylinder 6 Rapid and thorough mixing of materials in each phase.

Embodiment 2: Same as Embodiment 1, except that the stirring shaft 19 is provided with 3 agitators, and the heat exchange plate 5 is provided with 3 sets of heat exchange medium channel groups 25, and each heat exchange medium channel group 25 There are 3 passages 24 in it.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the present utility model. within the scope of the new protection.

Claims (6)

1. novel heterogeneous stirred reactor; Comprise cylindrical shell (6); Upper cover (3) is connected with cylindrical shell (6) through flange respectively with low head (8); Cylindrical shell (6) center is provided with shaft (19); Transmission mechanism (1) is located at the top of upper cover (3) and is connected with shaft (19), and supporting mechanism (11) is located at the bottom of low head (8) and is connected with shaft (19), and it is characterized in that: said shaft (19) is provided with at least two agitators; Promptly main agitator (9) and secondary agitator (15); Be provided with heat exchanger package, heat transferring medium inlet ring pipe (16) and heat transferring medium outlet ring pipe (18) that a plurality of heat exchange plates (5) are formed in the said cylindrical shell (6), heat transferring medium inlet ring pipe (16) is connected with heat exchange plate (5) through inlet interface channel (4a), and heat transferring medium outlet ring pipe (18) is connected with heat exchange plate (5) through outlet interface channel (20a); Cylindrical shell (6) outer wall is provided with heat transferring medium inlet (4) and material outlet (17); Upper cover (3) outer wall is provided with material inlet (2) and heat transferring medium outlet (20), and low head (8) outer wall is provided with discharge gate (10) and gas access (12), and the gas distributor of being located under the main agitator (9) (13) is connected with gas access (12).

2. a kind of novel heterogeneous stirred reactor as claimed in claim 1 is characterized in that the shape of described heat exchange plate (5) has specific radius of curvature, and heat exchange plate (5) α, radial mode at a certain angle is distributed on around the central shaft of cylindrical shell (6).

3. according to claim 1 or claim 2 a kind of novel heterogeneous stirred reactor is characterized in that described heat exchange plate (5) distribution angle α is 20 °～60 °.

4. according to claim 1 or claim 2 a kind of novel heterogeneous stirred reactor is characterized in that described heat exchange plate (5) is provided with at least two group heat exchanging medium passage groups (25), is provided with 2-3 heat exchanging medium passage (24) in each heat exchanging medium passage group (25).

5. a kind of novel heterogeneous stirred reactor as claimed in claim 4, the cross section that it is characterized in that described heat exchanging medium passage (24) is a rhombus.

6. a kind of novel heterogeneous stirred reactor as claimed in claim 4 is characterized in that being provided with between the said heat exchanging medium passage group (25) space (23).

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