Chemical synthesis reaction kettle

Abstract

The utility model relates to the technical field of chemical synthesis, in particular to a chemical synthesis reaction kettle, which comprises a reaction kettle, a cooling device and a stirring device are arranged in the reaction kettle, the cooling device comprises a plurality of corrugated cooling pipes, crests or troughs of the plurality of cooling pipes form a plurality of coaxial circular rings, and the stirring device is arranged in the reaction kettle. The stirring device comprises a stirring shaft and a stirring unit, the stirring unit comprises a connecting rod and a stirring rod, and the connecting rod is connected with the stirring shaft. The cooling pipe is arranged in the reaction kettle and is corrugated, so that the contact surface between liquid and a cooling medium is increased, the heat exchange efficiency is improved, and meanwhile, the corrugated cooling pipe is beneficial to forming a plurality of coaxial annular solution rings, so that the stirring rod can rotate in the annular solution rings to stir. The stirring device is reasonable in design, the stirring efficiency of the stirring device is improved, raw materials are rapidly and uniformly mixed, meanwhile, the heat exchange efficiency of a solution is improved, and control over the reaction temperature is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical synthesis, in particular to a chemical synthesis reaction kettle. Background Art

[0002] 2-Methyl-5-nitrophenol (also known as 5-nitro-o-cresol) is an important organic chemical raw material, widely used in synthetic dyes, medicines and pesticides, and is a dye intermediate with great development prospects.

[0003] Prior art CN105837452A discloses a 2-methyl-5-nitrophenol production process, which uses o-toluidine as a raw material, adds o-toluidine to 98% concentrated sulfuric acid, then adds a mixture of concentrated sulfuric acid and concentrated nitric acid to the reactant for reaction, and then hydrolyzes it to obtain the product. In this production process, on the one hand, due to the high density, high viscosity, and strong oxidizing property of concentrated sulfuric acid, if o-toluidine is not dispersed in time after being added to concentrated sulfuric acid, it will cause the occurrence of o-toluidine side reactions and affect the product quality; on the other hand, in this production process, the reaction temperature needs to be strictly controlled, and the existing reactors are mostly jacketed reactors, and the heat exchange medium is in the jacket of the reactor, and the solution in the reactor is cooled by heat transfer. This cooling method is inefficient, which will affect the production efficiency and even the quality of the product. Utility Model Content

[0004] The utility model aims to provide a chemical synthesis reactor in view of the deficiencies in the prior art. The reactor has a reasonable design, which not only improves the stirring efficiency of the stirring device and allows the raw materials to be quickly mixed evenly, but also improves the heat exchange efficiency of the solution, which is beneficial to the control of the reaction temperature.

[0005] The utility model solves the technical problem by adopting the following technical scheme: a chemical synthesis reactor, comprising a reactor, wherein a cooling device and a stirring device are arranged inside the reactor, wherein the cooling device comprises a plurality of corrugated cooling pipes, wherein a heat exchange medium inlet is arranged at one end of the cooling pipes, and a heat exchange medium outlet is arranged at the other end, wherein the wave crests or wave troughs of the plurality of cooling pipes form a plurality of coaxial circular rings, wherein the stirring device comprises a stirring shaft and a stirring unit, wherein the stirring unit comprises a connecting rod and a stirring rod, wherein the connecting rod is connected to the stirring shaft, wherein the stirring rod is connected to the connecting rod, and wherein the stirring rod is located inside the circular ring.

[0006] Furthermore, the cooling pipes are located in a vertical plane, and the plurality of cooling pipes are parallel to each other.

[0007] Furthermore, the stirring rod is arranged vertically.

[0008] Furthermore, the connecting rod includes an upper connecting rod, the stirring rod includes an upper stirring rod, the upper connecting rod and the upper stirring rod are located above the cooling tube, and the upper stirring rod is located in a circular ring formed by a wave trough of the cooling tube.

[0009] Furthermore, the connecting rod includes a lower connecting rod, the stirring rod includes a lower stirring rod, the lower connecting rod and the lower stirring rod are located below the cooling tube, and the lower stirring rod is located in a circular ring formed by the wave crest of the cooling tube.

[0010] Furthermore, the heat exchange medium inlet and the heat exchange medium outlet are located above the reactor.

[0011] Furthermore, the heat exchange medium inlet is provided with a valve.

[0012] Furthermore, the cooling pipe is connected to the inner wall of the reactor through a fixing clamp.

[0013] The beneficial effects of the utility model are as follows: a chemical synthesis reactor, comprising a reactor, wherein a cooling device and a stirring device are arranged inside the reactor, wherein the cooling device comprises a plurality of corrugated cooling pipes, wherein one end of the cooling pipes is provided with a heat exchange medium inlet, and the other end is provided with a heat exchange medium outlet, wherein the wave crests or wave troughs of the plurality of cooling pipes form a plurality of coaxial circular rings, wherein the stirring device comprises a stirring shaft and a stirring unit, wherein the stirring unit comprises a connecting rod and a stirring rod, wherein the connecting rod is connected to the stirring shaft, wherein the stirring rod is connected to the connecting rod, and wherein the stirring rod is located inside the circular ring. By arranging the cooling pipe inside the reactor and making it corrugated, it is beneficial to increase the contact surface between the liquid and the cooling medium and improve the heat exchange efficiency, and at the same time, the corrugated cooling pipe is beneficial to form a plurality of coaxial annular solution rings, thereby facilitating the stirring rod to rotate in the annular solution ring for stirring. The utility model is reasonably designed, which not only improves the stirring efficiency of the stirring device and enables the raw materials to be quickly and evenly mixed, but also improves the heat exchange efficiency of the solution and is beneficial to the control of the reaction temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a structural schematic diagram of the internal cooling device and stirring unit of the reactor of the utility model.

[0016] Figure 3 yes Figure 2 main view.

[0017] Figure 4 yes Figure 2 Top view of the .

[0018] Description of reference numerals:

[0019] 1——reactor, 2——cooling device, 21——cooling pipe, 22——heat exchange medium inlet, 23——heat exchange medium outlet, 3——ring, 4——stirring shaft, 5——stirring unit, 51——connecting rod, 511——upper connecting rod, 512——lower connecting rod, 52——stirring rod, 521——upper stirring rod, 522——lower stirring rod. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the scope of implementation of the present invention is not limited thereto.

[0021] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a chemical synthesis reactor of the present embodiment includes a reactor 1, wherein a cooling device 2 and a stirring device are arranged inside the reactor 1, and a liquid outlet is arranged at the bottom of the reactor, wherein the cooling device 2 includes a plurality of corrugated cooling pipes 21, wherein a heat exchange medium inlet 22 is arranged at one end of the cooling pipe 21, and a heat exchange medium outlet 23 is arranged at the other end, wherein the cooling pipe 21 is located in a vertical plane, wherein the plurality of cooling pipes 21 are parallel to each other, and the wave crests or wave troughs of the plurality of cooling pipes 21 form a plurality of coaxial rings 3, namely, the cooling pipe 2 1 forms a plurality of circular rings 3 at the wave crests, and a plurality of circular rings 3 are formed at the wave troughs of the cooling tube 21. The stirring device comprises a stirring shaft 4 and a stirring unit 5. The driving device drives the stirring shaft 4 to rotate. The stirring shaft 4 is coaxial with the reactor 1. The stirring unit 5 comprises a connecting rod 51 and a stirring rod 52. The connecting rod 51 is connected to the stirring shaft 4. The stirring rod 52 is connected to the connecting rod 51. The stirring rod 52 is vertically arranged and is located in the circular ring 3. Therefore, when the stirring rod 52 rotates and stirs, it does not interfere with the cooling tube 21.

[0024] When in use, by transporting heat exchange medium into the cooling tube 21, since the cooling tube 21 is corrugated and arranged inside the reactor 1, the heat exchange area can be increased and the heat exchange efficiency can be improved. At the same time, the stirring rod 52 of the stirring unit 5 is located in the crest or trough of the corrugated cooling tube 21. During the rotation and stirring process of the stirring rod 52, the heat exchange of the cooling tube 21 is not affected.

[0025] The connecting rod 51 includes an upper connecting rod 511, and the stirring rod 52 includes an upper stirring rod 521. The upper connecting rod 511 and the upper stirring rod 521 are located above the cooling tube 21, and the upper stirring rod 521 is located in the ring 3 formed by the wave trough of the cooling tube 21. When the stirring shaft 4 drives the upper stirring rod 521 to rotate, the upper stirring rod 521 rotates in the ring 3 formed by the wave trough of the cooling tube 21, thereby stirring the solution in the reactor 1, so that the newly added raw materials are evenly mixed in the solution in the reactor 1. In addition, the upper stirring rod 521 stirs the solution, which can enable the solution to quickly exchange heat and increase the speed of cooling or heating the solution.

[0026] The connecting rod 51 includes a lower connecting rod 512, and the stirring rod 52 includes a lower stirring rod 522. The lower connecting rod 512 and the lower stirring rod 522 are located below the cooling tube 21. The lower stirring rod 522 is located in the ring 3 formed by the wave crest of the cooling tube 21. The stirring shaft 4 drives the lower stirring rod 522 to rotate, and the lower stirring rod 522 stirs the solution in the reactor 1 to achieve rapid heat exchange between the solution in the reactor 1 and the heat exchange medium in the cooling tube 21, while uniformly mixing the raw materials in the reactor 1.

[0027] The heat exchange medium inlet 22 and the heat exchange medium outlet 23 are located above the reactor 1, that is, both ends of the cooling tube 21 are connected to the heat exchange medium inlet 22 and the heat exchange medium outlet 23 along the inner wall of the reactor 1 upward, and there is no need to open a mounting hole on the side of the reactor 1, which is conducive to ensuring the integrity of the reactor 1 and reducing the risk of leakage of the reactor 1.

[0028] The heat exchange medium inlet 22 is provided with a valve, so that the flow rate of the heat exchange medium in the cooling pipe 21 can be adjusted through the valve to achieve rapid heat exchange of the solution in the reactor 1.

[0029] The cooling tube 21 is connected to the inner wall of the reactor 1 via a fixing clamp, and the fixing of the cooling tube 21 can be strengthened by the fixing clamp.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A chemical synthesis reactor, characterized in that: The invention comprises a reactor (1), wherein a cooling device (2) and a stirring device are arranged inside the reactor (1), wherein the cooling device (2) comprises a plurality of corrugated cooling tubes (21), wherein one end of the cooling tubes (21) is provided with a heat exchange medium inlet (22), and the other end is provided with a heat exchange medium outlet (23), wherein the wave crests or wave troughs of the plurality of cooling tubes (21) form a plurality of coaxial circular rings (3), and wherein the stirring device comprises a stirring shaft (4) and a stirring unit (5), wherein the stirring unit (5) comprises a connecting rod (51) and a stirring rod (52), wherein the connecting rod (51) is connected to the stirring shaft (4), and the stirring rod (52) is connected to the connecting rod (51), and the stirring rod (52) is located inside the circular ring (3).

2. A chemical synthesis reactor according to claim 1, characterized in that: The cooling pipe (21) is located in a vertical plane, and a plurality of cooling pipes (21) are parallel to each other.

3. A chemical synthesis reactor according to claim 1, characterized in that: The stirring rod (52) is arranged vertically.

4. A chemical synthesis reactor according to claim 1, characterized in that: The connecting rod (51) comprises an upper connecting rod (511), and the stirring rod (52) comprises an upper stirring rod (521). The upper connecting rod (511) and the upper stirring rod (521) are located above the cooling tube (21), and the upper stirring rod (521) is located within a circular ring formed by a wave trough of the cooling tube (21).

5. A chemical synthesis reactor according to claim 1 or 4, characterized in that: The connecting rod (51) comprises a lower connecting rod (512), and the stirring rod (52) comprises a lower stirring rod (522). The lower connecting rod (512) and the lower stirring rod (522) are located below the cooling tube (21), and the lower stirring rod (522) is located within a circular ring formed by a wave crest of the cooling tube (21).

6. A chemical synthesis reactor according to claim 1, characterized in that: The heat exchange medium inlet (22) and the heat exchange medium outlet (23) are located above the reaction kettle (1).

7. A chemical synthesis reactor according to claim 1, characterized in that: The heat exchange medium inlet (22) is provided with a valve.

8. A chemical synthesis reactor according to claim 1, characterized in that: The cooling pipe (21) is connected to the inner wall of the reaction kettle (1) via a fixing clamp.

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