CN212942902U

CN212942902U - Concentrated reation kettle

Info

Publication number: CN212942902U
Application number: CN202021276078.3U
Authority: CN
Inventors: 兰亚朝
Original assignee: Shanxi Tongji Pharmaceuticals Co ltd
Current assignee: Shanxi Tongji Pharmaceuticals Co ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2021-04-13
Anticipated expiration: 2030-07-03

Abstract

The utility model discloses a concentrated reation kettle, including base (1), support reation kettle body (6) on base (1), reation kettle body (6) are the ellipsoid form, and are the intermediate layer formula, be provided with (mixing) shaft (8) on the axis of the reation kettle body (6), the reation kettle body (6) is passed through bearing (14) seal respectively to (mixing) shaft (8) upper end and lower extreme, be provided with spiral stirring vane (9) on (mixing) shaft (8), the radius of spiral stirring vane (9) is dwindled to both ends by the centre gradually. The utility model relates to a rationally, the rapid mixing who realizes the reactant through the special design of reation kettle body shape is even, lays spiral cooling coil in the cauldron body intermediate layer moreover and realizes the cooling, has fine practical application and worth.

Description

Concentrated reation kettle

Technical Field

The utility model relates to a reaction vessel technical field specifically is a mainly be applied to reation kettle of concentrated function.

Background

The reaction kettle is a container for carrying out physical or chemical reaction, and the heating, evaporation, cooling and low-speed mixing functions required by the process are realized through the structural design and parameter configuration of the container. The reaction kettle is widely applied to pressure vessels for petroleum, chemical engineering, rubber, pesticides, dyes, medicines and foods and is used for completing technological processes of vulcanization, nitration, hydrogenation, alkylation, polymerization, condensation and the like.

The reaction kettle generally comprises a kettle body, a kettle cover, a jacket, a stirrer, a transmission device, a shaft seal device, a support and the like. When the height-diameter ratio of the stirring device is larger, a plurality of layers of stirring blades can be used, and the stirring device can be randomly selected and matched according to the requirements of users. The jacket is arranged outside the kettle wall, or a heat exchange surface is arranged in the kettle, and the heat exchange can be carried out through external circulation. The supporting seat is provided with a supporting type or an ear type supporting seat and the like. The gear reducer is suitable for use when the rotating speed exceeds 160 turns, and the number, specification or other requirements of the holes can be designed and manufactured according to the requirements of users. (1) The sealing is usually carried out by adopting a filler under the condition of normal pressure or low pressure, and the using pressure is generally less than 2 kilograms; (2) mechanical sealing is adopted under the common medium pressure or vacuum pumping condition, and the common pressure is negative pressure or 4 kilograms; (3) and under the condition of high pressure or high medium volatility, magnetic sealing is adopted, and the pressure is generally over 14 kilograms. Except that the magnetic sealing adopts water for cooling, the cooling water jacket can be added in other sealing forms above 120 degrees.

Disclosure of Invention

The utility model aims at providing a novel concentrated reation kettle, be applied to the preparation of metronidazole.

The utility model discloses an adopt following technical scheme to realize:

a concentration reaction kettle comprises a base, wherein a reaction kettle body is supported on the base, the reaction kettle body is ellipsoidal and is of a sandwich type, a stirring shaft is arranged on the axis of the reaction kettle body, the upper end and the lower end of the stirring shaft respectively penetrate through the reaction kettle body through bearings in a sealing manner, a spiral stirring blade is arranged on the stirring shaft, and the radius of the spiral stirring blade is gradually reduced from the middle to the two ends; one or more spiral cooling coils are arranged in the interlayer of the reaction kettle body, the spiral cooling coils are in contact with the inner wall of the interlayer of the reaction kettle body and spirally ascend along the inner wall of the interlayer, the lower ends of the spiral cooling coils are used as cooling medium inlets, and the upper ends of the spiral cooling coils are used as cooling medium outlets; hollow raised heads are uniformly distributed on the inner wall of the reaction kettle body, and the interiors of the raised heads are communicated with the interlayer of the reaction kettle body; the bottom of the outer wall of the interlayer of the reaction kettle body is provided with a steam inlet, and the upper part of the outer wall of the interlayer is provided with a steam outlet; the upper part of the reaction kettle body is provided with a feed inlet and an exhaust outlet, and the lower part of the reaction kettle body is provided with a discharge outlet; the stirring shaft is driven by a motor.

When the cooling system works, the cooling medium (saline) inlet is connected with the saline pipeline, and the cooling medium (saline) outlet is connected with the return saline pipeline; the steam inlet is connected with a steam pipeline, and the steam outlet is connected with a recovery steam pipeline. The reactant enters from the feed inlet of the kettle body, the motor is started, and the stirring shaft rotates to perform stirring operation. When the temperature is required to be raised for concentration, a steam valve is opened, steam enters the interlayer of the reaction kettle body, and the reaction kettle is heated. If the temperature is too high and needs to be reduced, the saline enters from the spiral cooling coil to realize the temperature reduction process. After the reaction is finished, discharging from a discharge port. The temperature in the reaction kettle is monitored by arranging a temperature sensor in the reaction kettle.

The utility model has the advantages of as follows:

1. the interlayer of the reaction kettle is used as a heating part and also has the function of cooling, and steam is directly introduced into the interlayer for heating and concentrating. And set up one or more spiral cooling coil in the intermediate layer, realize the cooling through letting in cooling medium, can also control the rate of cooling to a certain extent.

2. The reaction kettle body is designed into an ellipsoid shape, and the appearance shape of the spiral stirring blade is also formed into an ellipsoid shape, so that the stirring speed can be improved to a certain extent, and the reactants can be quickly and uniformly mixed.

3. The raised heads are distributed on the inner wall of the reaction kettle body, are designed to be hollow and are communicated with the interlayer, and increase the contact area, so that the mixing speed of reactants is increased, the heat transfer effect is improved, and the steam consumption is saved.

The utility model relates to a rationally, the rapid mixing who realizes the reactant through the special design of reation kettle body shape is even, lays spiral cooling coil in the cauldron body intermediate layer moreover and realizes the cooling, has fine practical application and worth.

Drawings

Fig. 1 shows a schematic structural diagram of the present invention.

In the figure: 1-base, 2-support, 3-motor, 4-speed reducer, 5-driving bevel gear, 6-reaction kettle body, 7-spiral steam coil, 8-stirring shaft, 9-spiral stirring blade, 10-raised head, 11-steam inlet, 12-steam outlet, 13-driven bevel gear, 14-bearing, 15-feeding hole, 16-exhaust hole, 17-discharge hole, 18-cooling medium inlet and 19-cooling medium outlet.

Detailed Description

The following describes in detail specific embodiments of the present invention with reference to the accompanying drawings.

A concentration reaction kettle is shown in figure 1 and comprises a base 1, wherein a reaction kettle body 6 is supported on the base 1, the reaction kettle body 6 is in an ellipsoid shape and is in a sandwich type, and the reaction kettle body is designed into an ellipsoid shape to be more beneficial to uniform mixing of reactants.

As shown in fig. 1, a stirring shaft 8 is arranged on the central axis of the reaction kettle body 6, the upper end and the lower end of the stirring shaft 8 respectively pass through the reaction kettle body 6 through bearings 14 in a sealing manner, a spiral stirring blade 9 is welded on the stirring shaft 8, and the radius of the spiral stirring blade 9 is gradually reduced (gradually changed) from the middle to the two ends because the reaction kettle body 6 is an ellipsoid.

As shown in fig. 1, in this embodiment, two spiral cooling coils 7 are disposed in the interlayer of the reaction vessel body 8, the spiral cooling coils 7 contact with the interlayer inner wall of the reaction vessel body 6 and spirally rise along the interlayer inner wall, the lower ends of the spiral cooling coils 7 are used as cooling medium inlets 18 (ports a and B), and the upper ends thereof are used as cooling medium outlets 19 (ports a and B). The significance of arranging the plurality of spiral cooling coils is that the relative rapid cooling or slow cooling can be realized by selecting one or any plurality of spiral cooling coils through cooling media. In addition, the spiral density of the spiral cooling coil also influences the speed of cooling by using the cooling medium, and the compactness of the spiral cooling coil is reasonably arranged according to actual conditions.

As shown in figure 1, hollow raised heads 10 are uniformly distributed on the inner wall of the reaction kettle body 6, and the insides of the raised heads 10 are communicated with the interlayer of the reaction kettle body 6. The raised head 10 has two functions, namely, the contact area is increased, the reactants can be rapidly and uniformly stirred in a stirring state, and steam can enter the raised head, so that the heat transfer surface of the raised head is increased, and the heating efficiency is improved.

As shown in figure 1, the bottom of the outer wall of the interlayer of the reaction kettle body 6 is provided with a steam inlet 11, and the upper part of the outer wall of the interlayer is provided with a steam outlet 12. The main effect of this reation kettle body lies in the concentration, then steam gets into the intermediate layer through steam inlet, conducts heat through inner wall and plush copper, heats up the concentration to the reaction liquid, if the temperature is too high, realizes the cooling through the coolant in the spiral cooling coil, prevents the high temperature.

As shown in fig. 1, the upper part of the reaction kettle body 6 is provided with a feed inlet 15 and an exhaust port 16 (for discharging water vapor in the concentration process); the lower part of the reaction kettle body 6 is provided with a discharge hole 17.

The stirring shaft 8 is driven by the motor 3. Specifically, as shown in fig. 1, a driven bevel gear 13 is fixed at the upper end of the stirring shaft 8, the driven bevel gear 13 is engaged with a driving bevel gear 5, the driving bevel gear 5 is located at the output shaft end of a speed reducer 4, the speed reducer 4 is connected with a motor 3, and the motor 3 and the speed reducer 4 are located on a support 2 outside the reaction kettle body 6. The base 1 and the support 2 are provided with counterweights to ensure the stability of the kettle body.

During specific work, the cooling medium (saline) inlet 18 is connected with a saline pipeline, and the cooling medium (saline) outlet 19 is connected with a return saline pipeline; the steam inlet 11 is connected with a steam pipeline, and the steam outlet 12 is connected with a recovery steam pipeline. The reactant enters from the feed inlet 15 of the kettle body, the motor 3 is started, and the stirring shaft 8 rotates to perform stirring operation. When the temperature is required to be raised for concentration, a steam valve is opened, steam enters the interlayer of the reaction kettle body, and the reaction kettle is heated. If the temperature is too high and needs to be reduced, the saline enters from the spiral cooling coil 7 to realize the temperature reduction process. After the reaction, the reaction mixture is discharged from the discharge port 17. The temperature in the reaction kettle is monitored by arranging a temperature sensor in the reaction kettle.

The technical solution obtained by the present invention through logic analysis and reasoning on the basis of the existing technology should be within the scope of the present invention.

Claims

1. A concentrated reation kettle, includes base (1), its characterized in that: the reaction kettle body (6) is supported on the base (1), the reaction kettle body (6) is ellipsoidal and is of a sandwich type, a stirring shaft (8) is arranged on the axis of the reaction kettle body (6), the upper end and the lower end of the stirring shaft (8) respectively penetrate through the reaction kettle body (6) in a sealing mode through bearings (14), spiral stirring blades (9) are arranged on the stirring shaft (8), and the radius of each spiral stirring blade (9) is gradually reduced from the middle to the two ends; one or more spiral cooling coils (7) are arranged in the interlayer of the reaction kettle body (6), the spiral cooling coils (7) are in contact with the inner wall of the interlayer of the reaction kettle body (6) and spirally ascend along the inner wall of the interlayer, the lower ends of the spiral cooling coils (7) are used as cooling medium inlets (18), and the upper ends of the spiral cooling coils are used as cooling medium outlets (19); hollow raised heads (10) are uniformly distributed on the inner wall of the reaction kettle body (6), and the interiors of the raised heads (10) are communicated with an interlayer of the reaction kettle body (6); a steam inlet (11) is formed in the bottom of the outer wall of the interlayer of the reaction kettle body (6), and a steam outlet (12) is formed in the upper part of the outer wall of the interlayer; a feed inlet (15) and an exhaust port (16) are formed in the upper part of the reaction kettle body (6), and a discharge outlet (17) is formed in the lower part of the reaction kettle body (6); the stirring shaft (8) is driven by the motor (3).

2. The concentration reactor of claim 1, wherein: the stirring shaft (8) upper end is fixed with driven bevel gear (13), driven bevel gear (13) and initiative bevel gear (5) meshing, initiative bevel gear (5) are located speed reducer (4) output shaft end, motor (3) is connected in speed reducer (4), motor (3) and speed reducer (4) are located support (2) outside the reation kettle body (6).