Crystallization reaction kettle

Abstract

The utility model relates to the field of reaction kettles, in particular to a crystallization reaction kettle, which comprises a reaction kettle body, a top cover, a stirring paddle, a feed port, a feed pipe and the like, a plurality of small holes are uniformly formed in the lower end of the feed pipe towards the center direction of the reaction kettle body, and check valves matched with the small holes are fixedly connected in the small holes; the stirring paddle comprises an anchor-shaped first blade and an anchor-shaped second blade, the first blade is tightly attached to the inner wall of the reaction kettle body, the second blade is arranged above the first blade, and the distance between the second blade and the rotating rod is smaller than the distance between the feeding pipe and the rotating rod; the first blade and the second blade are fixedly connected with a brush; in addition, the crystallization reaction kettle is also provided with proper devices such as a discharge hole, a coil pipe and a motor, so that the phenomenon that the inner wall of the reaction kettle body is crystallized firstly in the crystallization process is overcome, and the added solvent can be timely and uniformly dispersed in the reaction kettle body.

Description

Technical Field

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

[0002] Reactors are widely used in the chemical industry. As containers, reactors meet many process requirements such as heating, mixing, distillation and crystallization. Crystallization reactors are one type of reactors.

[0003] The cooling tube outside the crystallization reactor and the stirring inside cause the material in the reactor to condense and crystallize. For anti-solvent crystallization, anti-solvent needs to be added. However, during the crystallization process, the inner wall of the reactor often crystallizes first. The crystals that crystallize first hinder the heat transfer between the cooling tube and the material in the reactor, and the added anti-solvent cannot be dispersed in time, resulting in uneven crystallization in the reactor. These problems need to be solved urgently. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a crystallization reactor, comprising a reactor body, a top cover, a stirring paddle and a feed pipe, wherein the bottom end of the reactor body is provided with a discharge port, and the discharge port is provided with a discharge valve; the top cover is provided with a feed port, and the top cover is detachably connected to the top end of the reactor body, the feed pipe passes into the reactor body through the feed port, the feed pipe extends to the bottom of the reactor body, and the lower end of the feed pipe is sealed, and the lower end of the feed pipe is evenly provided with a plurality of small holes toward the center direction of the reactor body, and a check valve matching the small hole is fixedly connected in the small hole;

[0005] The stirring paddle includes a rotating rod, the top end of which coaxially passes through the top cover and is rotatably connected to the top cover. A motor is provided at the top end of the top cover, and the output end of the motor is transmission-connected to the rotating rod.

[0006] The stirring paddle includes an anchor-shaped first blade and a second blade, wherein the first blade is arranged close to the inner wall of the reactor body, and the second blade is arranged above the first blade, and the distance between the second blade and the rotating rod is smaller than the distance between the feeding pipe and the rotating rod;

[0007] A first brush is fixedly connected to a side of the first blade away from the rotating rod, and the first brush is arranged in contact with the inner wall of the reactor body; a second brush is fixedly connected to a side of the second blade away from the rotating rod, and the second brush is arranged in contact with the outer wall of the small hole;

[0008] A heat exchange coil is provided on the outside of the reactor body, one end of the heat exchange coil is connected to a water inlet, and the other end is connected to a water outlet.

[0009] As a further solution of the present invention, a cross beam is fixedly connected between the left and right ends of the second blade and the rotating rod, which is beneficial to ensuring the strength of the second blade.

[0010] As a further solution of the present invention, a support frame is fixedly connected to the outer side of the reactor body to facilitate the installation and fixation of the reactor body.

[0011] As a further solution of the present invention, the reactor body and the top cover are connected by a flange bolt structure, which facilitates the disassembly and assembly of the top cover.

[0012] The present invention also includes other components that enable the crystallization reactor to operate normally, which are all conventional technical means in the field. In addition, devices or components not limited in the present invention, such as flange bolt structure, check valve, motor, etc., are all conventional technical means in the field.

[0013] The working principle of this utility model is:

[0014] The feed pipe extends to the lower end of the reactor body, so that the feed solvent flows out through the small hole and is quickly and fully mixed with the material in the reactor body; the small hole is fixedly connected to a check valve of matching size, so that when the solvent is fed, the material in the reactor body will not flow back into the feed pipe; the first blade and the second blade are used to enhance the mixing of the material in the reactor body; the first brush and the second brush can scrape off the crystals that have crystallized first on the inner wall of the reactor body and the small hole of the feed pipe, thereby improving the heat exchange efficiency between the reactor body and the heat exchange coil; the bottom end of the reactor body is provided with a discharge port for discharging the material that has completely reacted in the reactor body.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The device solves the problem that the inner wall of the reactor body crystallizes first during the crystallization process, and enables the newly added solvent to be promptly and evenly dispersed in the reactor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model. DETAILED DESCRIPTION

[0019] The present invention is described below in conjunction with the accompanying drawings and specific embodiments of the present invention. The description herein is intended only to explain the present invention and is not intended to limit the present invention. Based on the embodiments of the present invention, any modifications, equivalent substitutions, improvements, etc. made by those skilled in the art without creative work to all other embodiments obtained based on the embodiments of the present invention shall be included within the scope of protection of the present invention.

[0020] Example

[0021] like Figure 1 As shown, the utility model provides a crystallization reactor, comprising a reactor body 6, a top cover 3, a stirring paddle and a feed pipe 1, wherein the bottom end of the reactor body 6 is provided with a discharge port 10, and the discharge port 10 is provided with a discharge valve; the top cover 3 is provided with a feed port 2, and the top cover 3 is connected to the top of the reactor body 6 through a flange bolt structure, the feed pipe 1 is introduced into the reactor body 6 through the feed port 2, the feed pipe 1 extends to the bottom of the reactor body 6, and the lower end of the feed pipe 1 is sealed, and the lower end of the feed pipe 1 is evenly provided with a plurality of small holes 12 toward the center direction of the reactor body 6, and a check valve matching the small hole 12 is fixedly connected in the small hole 12;

[0022] The stirring paddle includes a rotating rod 18, the top end of which coaxially passes through the top cover 3 and is rotatably connected to the top cover 3. The top end of the top cover 3 is provided with a motor 4, and the output end of the motor 4 is transmission-connected to the rotating rod 18;

[0023] The stirring paddle includes an anchor-shaped first blade 14 and a second blade 16. The first blade 14 is arranged close to the inner wall of the reactor body 6, and the second blade 16 is arranged above the first blade 14. The distance between the second blade 16 and the rotating rod 18 is smaller than the distance between the feeding pipe 1 and the rotating rod 18. In this embodiment, there are two feeding pipes 1, which are symmetrically arranged on both sides of the rotating rod 18.

[0024] A first brush 13 is connected to the side of the first blade 14 away from the rotating rod 18. The first brush 13 is arranged in contact with the inner wall of the reactor body 6. A second brush 15 is fixedly connected to the side of the second blade 16 away from the rotating rod 18. The second brush 15 is arranged in contact with the outer wall of the small hole 12.

[0025] A heat exchange coil 7 is provided on the outside of the reactor body 6 . One end of the heat exchange coil 7 is connected to a water inlet 9 , and the other end is connected to a water outlet 11 .

[0026] Specifically, a crossbeam 17 is fixedly connected between the left and right ends of the second blade 16 and the rotating rod 18 to ensure the strength of the second blade 16. More specifically, a support frame 8 is fixedly connected to the outer side of the reactor body 6 to facilitate the installation and fixation of the reactor body.

[0027] When the present invention is in use, the feed pipe 1 needs to be passed into the reactor body 6 through the feed port 2, ensuring that the small hole 12 at the lower end of the feed pipe 1 is facing the center of the reactor body 6, and stirring is started, so that the first brush 13 and the second brush 15 can smoothly brush the inner wall of the reactor body 6 and the small hole 12, and the solvent is passed into the feed pipe 1. The solvent flows into the reactor body 6 through the check valve of the small hole 12, and the solvent is stirred to quickly and fully mix the solvent with the material in the reactor body 6. The first brush 13 and the second brush 15 can clean off the crystals that have crystallized first on the inner wall of the reactor body 6 and around the small hole 12.

[0028] While the embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A crystallization reactor, comprising a reactor body, a top cover, a stirring paddle and a feed pipe, characterized in that: The bottom end of the reactor body is provided with a discharge port, and a discharge valve is provided on the discharge port; the top cover is provided with a feed port, and the top cover is detachably connected to the top end of the reactor body, the feed pipe is introduced into the reactor body through the feed port, the feed pipe extends to the bottom of the reactor body, and the lower end of the feed pipe is sealed, and the lower end of the feed pipe is evenly provided with a plurality of small holes toward the center of the reactor body, and a check valve matching the small hole is fixedly connected in the small hole; The stirring paddle includes a rotating rod, the top end of which coaxially passes through the top cover and is rotatably connected to the top cover. The top end of the top cover is provided with a motor, and the output end of the motor is transmission-connected to the rotating rod. The stirring paddle includes an anchor-shaped first blade and a second blade, wherein the first blade is arranged close to the inner wall of the reactor body, and the second blade is arranged above the first blade, and the distance between the second blade and the rotating rod is smaller than the distance between the feeding pipe and the rotating rod; A first brush is fixedly connected to a side of the first blade away from the rotating rod, and the first brush is arranged in contact with the inner wall of the reactor body; a second brush is fixedly connected to a side of the second blade away from the rotating rod, and the second brush is arranged in contact with the outer wall of the small hole; A heat exchange coil is provided on the outside of the reactor body, one end of the heat exchange coil is connected to a water inlet, and the other end is connected to a water outlet.

2. The crystallization reactor according to claim 1, wherein: A crossbeam is fixedly connected between the left and right ends of the second blade and the rotating rod.

3. The crystallization reactor according to claim 1, wherein: The outer side of the reactor body is fixedly connected with a support frame.

4. The crystallization reactor according to claim 1, wherein: The reactor body and the top cover are connected via a flange bolt structure.

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