Acid precipitation crystallization reaction device

Abstract

The utility model discloses an acidification crystallization reaction device, which belongs to the technical field of crystallization and comprises a liquid storage barrel and a crystallization barrel provided with a feed pipe A. The liquid storage barrel is communicated with one end of a feed main pipe B, the other end of the feed main pipe B is communicated with the top of the crystallization barrel, and a discharge port is arranged at the bottom of the crystallization barrel and connected with one end of a circulating pipe. The other end of the circulating pipe is communicated with the top of the crystallization barrel, the circulating pipe is provided with a circulating pump, the middle of the circulating pipe is connected with a discharging pipe, a stirring paddle is arranged in the crystallization barrel, and a shaft rod of the stirring paddle extends out of the crystallization barrel to be connected to a speed reducer. Materials in the crystallization barrel are continuously pumped to the top from the bottom through the circulating pipe, an acid solution is continuously supplemented through the feeding main pipe B, stirring is uniform, the whole acidification crystallization process is carried out in a dynamic environment, crystals are not prone to precipitation, pipeline blockage is avoided, and uniform particle size distribution of crystallized particles is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of crystallization, in particular to an acid precipitation crystallization reaction device. Background Art

[0002] Acid precipitation crystallization reactors are widely used in the chemical, pharmaceutical, food, and environmental protection industries. They are experimental or production equipment for acid precipitation crystallization. They primarily control the solution's pH, temperature, stirring speed, and other conditions to achieve supersaturation of the solute in an acidic environment and precipitate crystals. During production, the solution is heated in a heating tank and then fed into the acid precipitation crystallization reactor for crystallization. Existing crystallization reactors suffer from issues such as easy precipitation of crystals, uneven particle size distribution, and poor impurity separation. Utility Model Content

[0003] The purpose of the utility model is to provide an acid precipitation crystallization reaction device to solve the problems raised in the above background technology.

[0004] The utility model provides an acid precipitation crystallization reaction device, comprising a liquid storage barrel and a crystallization barrel provided with a feed pipe A, the liquid storage barrel is connected with one end of a feed pipe B, the other end of the feed pipe B is connected with the top of the crystallization barrel, a discharge port is provided at the bottom of the crystallization barrel, the discharge port is connected with one end of a circulation pipe, the other end of the circulation pipe is connected with the top of the crystallization barrel, a circulation pump is installed on the circulation pipe, the middle part of the circulation pipe is connected with the discharge pipe, a stirring paddle is provided in the crystallization barrel, and a shaft of the stirring paddle extends out of the crystallization barrel and is connected to a reducer.

[0005] A further solution: the circulation pipe is equipped with a third valve and a fourth valve, the circulation pump is located between the third valve and the fourth valve, the connection part between the discharge pipe and the circulation pipe is located between the circulation pump and the fourth valve, and the discharge pipe is equipped with a fifth valve.

[0006] A further solution: the B feed main pipe is equipped with a second valve and a first feed pump, and the first feed pump is located near one end of the liquid storage barrel.

[0007] A further solution: the middle of the B feed main pipe is also connected to a return bypass pipe, one end of the return bypass pipe is located between the second valve and the crystallization barrel, and the other end is connected to the liquid storage barrel, and the return bypass pipe is installed with a first valve.

[0008] A further solution: a horizontal dispersion slot plate is provided in the crystallization barrel, and one end port of the B feed main pipe and the circulation pipe communicating with the crystallization barrel is located above the dispersion slot plate.

[0009] A further solution is that a guide plate is provided in the crystallization barrel, the guide plate is conical, the large round end of the guide plate is connected to the inner wall of the crystallization barrel in a breakpoint manner, and the guide plate is located below the stirring paddle.

[0010] A further solution: the feed pipe A is equipped with a sixth valve.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. The material in the crystallization barrel is continuously pumped from the bottom to the top through the circulation pipe, and the acid solution is continuously added through the feed pipe B to stir evenly. The entire acid precipitation crystallization process is carried out in a dynamic environment. The crystals are not easy to precipitate and will not cause pipeline blockage, which is conducive to uniform distribution of crystal particle size.

[0013] 2. Install a dispersion slot plate in the crystallization barrel. The materials entering the crystallization barrel from the circulation pipe and the B feed pipe first fall onto the dispersion slot plate for preliminary mixing, fall through the gaps in the dispersion slot plate, and are then stirred and fully mixed by the stirring paddle, which is beneficial to improving the impurity separation effect and more conducive to uniform particle size distribution of the crystal particles.

[0014] 3. Install a guide plate in the crystallization barrel. The material falling from the gap of the dispersion slot plate will first fall onto the guide plate, then go down along the inclined wall of the guide plate, and fall to the bottom of the crystallization barrel from the gap between the lower end of the guide plate and the inner wall of the crystallization barrel. Then, it will be transported to the dispersion slot plate through the circulation pipe until the entire acid precipitation crystallization reaction is completed. This will keep the material in a non-static state in the crystallization barrel, avoid crystallization precipitation, improve the impurity separation effect, and ensure uniform particle size distribution of the crystal particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0017] In the figure: 1-crystallization barrel; 2-speed reducer; 3-stirring paddle; 4-return bypass pipe; 41-first valve; 5-B feed main pipe; 51-second valve; 52-first feed pump; 6-circulation pipe; 61-third valve; 62-circulation pump; 63-fourth valve; 7-liquid storage barrel; 8-discharge pipe; 81-fifth valve; 9-A feed pipe; 91-sixth valve; 10-guide plate; 11-dispersion slot plate. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for the purpose of explaining the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein can be arranged and designed in a variety of different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0020] Please refer to Figure 1 The embodiment provides an acid precipitation crystallization reaction device, which comprises a liquid storage barrel 7 and a crystallization barrel 1. An A feeding pipe 9 is arranged in the middle of the crystallization barrel 1. The liquid storage barrel 7 is in communication with one end of a B feeding main pipe 5. The other end of the B feeding main pipe 5 is in communication with the top of the crystallization barrel 1. A discharge port is arranged at the bottom of the crystallization barrel 1. The discharge port is connected with one end of a circulating pipe 6. The other end of the circulating pipe 6 is in communication with the top of the crystallization barrel 1. A circulating pump 62 is arranged on the circulating pipe 6. A discharge pipe 8 is connected with the middle of the circulating pipe 6. A stirring paddle 3 is arranged in the crystallization barrel 1. The shaft of the stirring paddle 3 extends out of the crystallization barrel 1 and is connected with a speed reducer 2.

[0021] The sixth valve 91 can be arranged on the A feeding pipe 9. When the sixth valve 91 is opened, a solution containing a target substance in a preset amount is sent into the crystallization barrel 1 through the feeding pipe 9. When the sixth valve 91 is closed, the stirring paddle 3 is stirred at a constant speed under the action of the speed reducer 2. The circulating pipe 6 continuously pumps the solution containing the target substance from the bottom of the crystallization barrel 1 to the top of the crystallization barrel 1. The B feeding main pipe 5 adds the acidic solution in the liquid storage barrel 7 into the crystallization barrel 1, and the acidic solution is fully mixed with the solution containing the target substance to perform acid precipitation crystallization. The finished product liquid is discharged through the discharge pipe 8 after the acid precipitation crystallization reaction is fully completed. The material in the crystallization barrel 1 is continuously sent from the bottom to the top through the circulating pipe 6, and the acidic solution is continuously added through the B feeding main pipe 5. The material is uniformly stirred. The whole acid precipitation crystallization process is carried out in a dynamic environment. The crystallization is not easy to precipitate, and the pipeline is not easy to be blocked. The crystallization particle size distribution is uniform.

[0022] In some embodiments, the circulating pipe 6 is provided with a third valve 61 and a fourth valve 63. The circulating pump 62 is located between the third valve 61 and the fourth valve 63. The connection part of the discharge pipe 8 and the circulating pipe 6 is located between the circulating pump 62 and the fourth valve 63. The discharge pipe 8 is provided with a fifth valve 81. When the solution containing the target substance circulates in the circulating pipe 6 and the crystallization barrel 1, the fifth valve 81 is closed, and the third valve 61, the circulating pump 62 and the fourth valve 63 are opened. When the finished product liquid is discharged through the discharge pipe 8, the fourth valve 63 is closed, and the third valve 61, the circulating pump 62 and the fifth valve 81 are opened.

[0023] In some embodiments, the B feeding main pipe 5 is provided with a second valve 51 and a first feeding pump 52. The first feeding pump 52 is located near one end of the liquid storage barrel 7. The first feeding pump 52 pumps the acidic solution in the liquid storage barrel 7 to the top of the crystallization barrel 1.

[0024] Furthermore, a return bypass pipe 4 is connected to the middle of the B feed main pipe 5, one end of the return bypass pipe 4 is located between the second valve 51 and the crystallization barrel 1, and the other end is connected to the liquid storage barrel 7. The return bypass pipe 4 is installed with a first valve 41. When the first feed pump 52 pumps the acidic solution to the crystallization barrel 1, the feed rate of the acidic solution can be adjusted by opening and closing the first valve 41. When the feed rate of the acidic solution needs to be reduced, the first valve 41 is opened to allow part of the acidic solution pumped into the B feed main pipe 5 by the first feed pump 52 to return to the liquid storage barrel 7 through the return bypass pipe 4.

[0025] In some embodiments, a horizontal dispersion slot plate 11 is provided in the crystallization barrel 1, and one end port of the B feed main 5 and the circulation pipe 6 communicating with the crystallization barrel 1 is located above the dispersion slot plate 11. The material entering the crystallization barrel 1 through the B feed main 5 and the circulation pipe 6 first falls onto the dispersion slot plate 11 for preliminary mixing, and falls through the gap on the dispersion slot plate 11, and then is stirred and fully mixed by the stirring paddle 3, which is beneficial to improving the impurity separation effect and more conducive to uniform distribution of crystal particle size.

[0026] In some embodiments, a guide plate 10 is provided in the crystallization barrel 1. The guide plate 10 is conical, and the large round end of the guide plate 10 is connected to the inner wall of the crystallization barrel 1 in a discontinuous manner. The guide plate 10 is located below the stirring paddle 3. The material falling from the gap of the dispersion slot 11 first falls onto the guide plate 10, descends along the inclined wall of the guide plate 10, falls to the bottom of the crystallization barrel 1 from the gap between the lower end of the guide plate 10 and the inner wall of the crystallization barrel 1, and is then transported to the dispersion slot 11 through the circulation pipe 6 until the entire acid precipitation crystallization reaction is completed, so that the material is always in a non-static state in the crystallization barrel, avoiding crystal precipitation, improving the impurity separation effect, and uniformly distributing the particle size of the crystal particles.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] The above content is merely an example and explanation of the structure of the present utility model. Technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the scope of protection of the present utility model.

Claims

1. An acid precipitation crystallization reaction device, characterized in that: The invention comprises a liquid storage barrel and a crystallization barrel provided with an A feed pipe, wherein the liquid storage barrel is connected with one end of the B feed pipe, the other end of the B feed pipe is connected with the top of the crystallization barrel, a discharge port is provided at the bottom of the crystallization barrel, the discharge port is connected with one end of a circulation pipe, the other end of the circulation pipe is connected with the top of the crystallization barrel, a circulation pump is installed on the circulation pipe, a discharge pipe is connected to the middle of the circulation pipe, a stirring paddle is provided in the crystallization barrel, a shaft of the stirring paddle extends out of the crystallization barrel and is connected to a reducer, a horizontal dispersion slot plate is provided in the crystallization barrel, and one end port of the B feed pipe, the circulation pipe and the crystallization barrel being connected is located above the dispersion slot plate.

2. A kind of acid precipitation crystallization reaction device according to claim 1, is characterized in that, The circulation pipe is equipped with a third valve and a fourth valve, the circulation pump is located between the third valve and the fourth valve, the connection part between the discharge pipe and the circulation pipe is located between the circulation pump and the fourth valve, and the discharge pipe is equipped with a fifth valve.

3. A kind of acid precipitation crystallization reaction device according to claim 1, is characterized in that, The B feed main is equipped with a second valve and a first feed pump, and the first feed pump is located near one end of the liquid storage barrel.

4. An acid precipitation crystallization reaction device according to claim 3, characterized in that, The middle part of the B feed main pipe is also connected to a return bypass pipe, one end of the return bypass pipe is located between the second valve and the crystallization barrel, and the other end is connected to the liquid storage barrel. The return bypass pipe is installed with a first valve.

5. An acid precipitation crystallization reaction device according to claim 1, characterized in that, A guide plate is provided in the crystallization barrel. The guide plate is conical in shape. The large circular end of the guide plate is connected to the inner wall of the crystallization barrel in a breakpoint manner. The guide plate is located below the stirring paddle.

6. An acid precipitation crystallization reaction device according to claim 1, characterized in that, The A feed pipe is equipped with a sixth valve.

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