A plate crystallizer device

Abstract

The utility model relates to crystallization technical field especially is involved in a kind of plate type crystallizer device, comprising: crystallizer, its inside has the space of containing liquid to be crystallized;Control manifold shunt component, it is connected with the crystallizer, and provides heat exchange medium for crystallizer, simultaneously with heat exchange medium shunt flow into crystallizer inside;Temperature sensor component, it is used to measure the temperature inside crystallizer and the temperature in control manifold shunt component;Control terminal, according to the temperature monitored by the temperature sensor component, the flow of heat exchange medium is adjusted in real time by control manifold shunt component, so that the temperature in crystallizer is uniform;The quantity of control manifold shunt component is two, and it is separately arranged in the both sides of crystallizer;The crystallizer inside includes multiple crystallization plates, and the crystallization plate that two control manifold shunt components shunt heat exchange medium pass into is alternately arranged.The utility model makes the even heating inside crystallizer, avoids temperature deviation, eliminates crystallization process blind area problem.

Description

Technical Field

[0001] This utility model relates to the field of crystallization technology, and in particular to a plate crystallizer device. Background Technology

[0002] A plate crystallizer is a device that utilizes the structural principle of a plate heat exchanger for industrial crystallization processes. Essentially, it is a highly efficient forced-circulation crystallizer, its core component being a set of parallel heat transfer plates. It leverages the efficient heat transfer characteristics of the plate heat exchanger to induce supersaturation through forced circulation of the mother liquor and precise temperature control (evaporation after cooling or heating), thereby achieving a controllable crystallization process. Its core advantages lie in its extremely high heat transfer efficiency, precise temperature control, excellent fluid distribution, compact structure, and low fouling tendency, making it increasingly widely used in industries such as chemical, pharmaceutical, and food processing, especially in applications requiring high crystal purity, particle size distribution, and process stability.

[0003] However, the crystallization method currently used is the finned tube structure, which is a circular tube structure. When heated, the tube wall forms a ring shape, and a heating blind zone is formed between the tubes. During the crystallization process, if the blind zone is eliminated to ensure the yield, over-crystallization will occur, resulting in severe impurity encapsulation. Furthermore, heat conduction cannot be fully transferred during the sweating process. Generally, a large amount of material on the tube wall melts, while the blind zone is not completely purified, affecting the purity of the product. In addition, the fins delay the heating of the tube body. According to actual tests, after the fins are encapsulated by crystals, the heating temperature of the fins deviates from that of the tube wall by 0.5℃.

[0004] Therefore, a new type of plate crystallizer device needs to be designed to solve the existing problems such as uneven heating, large temperature error, and poor crystallization effect / quality. Utility Model Content

[0005] To address the existing problems, this utility model provides a plate crystallizer device.

[0006] To achieve the objectives of this utility model, the technical solution adopted is as follows: A plate crystallizer apparatus, comprising: A crystallizer, which has an internal space to contain the liquid to be crystallized; A control manifold diversion assembly is connected to the crystallizer and provides heat exchange medium to the crystallizer, while simultaneously diverting the heat exchange medium into the interior of the crystallizer. A temperature sensor assembly, used to measure the temperature inside the crystallizer and to control the temperature inside the manifold shunt assembly; The control terminal adjusts the flow rate of the heat exchange medium in real time by controlling the manifold distribution assembly based on the temperature monitored by the temperature sensor assembly, so as to make the temperature in the crystallizer uniform. The number of control manifold diversion components is two, and the two control manifold diversion components are respectively arranged on both sides of the crystallizer; the crystallizer contains multiple crystallization plates, and the crystallization plates into which the heat exchange medium is diverted by the two control manifold diversion components are alternately arranged.

[0007] Furthermore, the crystallizer includes a box, which is square, and multiple crystallization plates are arranged inside the box in an array.

[0008] Furthermore, the control manifold diversion assembly includes a diverter, a switching valve, and a flow regulating valve. The diverter includes a main pipe and multiple branch pipes. The main pipe is connected to a heat exchange medium source, and the branch pipes are connected to a crystallizing plate. The main pipe is equipped with the on / off valve, and each branch pipe is equipped with a flow regulating valve; The crystallizing plates connected by the branch pipes on both sides of the crystallizer are arranged alternately.

[0009] Furthermore, an outlet is provided on the other side of the crystallization plate connected to the branch pipe, and all outlets of the crystallization plate connected to the same control manifold diversion assembly are connected to an outlet pipe.

[0010] Furthermore, the connection point between the branch pipe and the crystallizing plate is located on the upper side wall of the crystallizing plate, and the connection point between the outlet pipe and the crystallizing plate is located on the lower side wall of the crystallizing plate.

[0011] Furthermore, the temperature sensor assembly includes a first temperature sensor and a second temperature sensor, the first temperature sensor being disposed inside the main pipe and the second temperature sensor being disposed inside the crystallizer.

[0012] Furthermore, at least two second temperature sensors are provided, and the locations of the at least two second temperature sensors are different.

[0013] Furthermore, the heat exchange medium is steam.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) By setting up a sensor assembly, this utility model can monitor the temperature inside and outside the crystallizer in real time. At the same time, combined with the plate-shaped crystallizer plate, it can ensure uniform heating and avoid the situation where the temperature deviation is large and cannot be monitored in time. (2) By setting up a control manifold diversion component, this utility model can ensure that the whole crystallizer and a single crystallization plate or a single crystallization plate unit are heated uniformly by controlling the pipeline and flow rate. The purpose of ensuring heat transfer uniformity is to provide a heat transfer basis in the industrial naphthalene refining process. In the crystallization and sweating process, it ensures that the whole and local crystal nucleation, crystal growth and sweating impurity removal inside the device are completely consistent, eliminating the problem of blind spots in the crystallization process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Reference numerals: 1. Box body, 2. Crystallization plate, 3. Main pipe, 4. Branch pipe, 5. Switch valve, 6. Flow control regulating valve, 7. First temperature sensor, 8. Second temperature sensor, 9. Outlet pipe. Detailed Implementation

[0017] The present invention will be further described and illustrated below with reference to the accompanying drawings and specific embodiments. The technical features of each embodiment of the present invention can be combined accordingly, provided that there is no mutual conflict.

[0018] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0019] In the description of this utility model, it should be understood that when an element is considered to be "connected" to another element, it can be directly connected to the other element or indirectly connected, i.e., there is an intermediate element. Conversely, when an element is said to be "directly" connected to another element, there is no intermediate element.

[0020] In the description of this utility model, it should be understood that the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include at least one of those features.

[0021] Example This embodiment provides a plate crystallizer device, which includes a crystallizer, a control manifold shunt assembly, a temperature sensor assembly, and a control terminal. The control manifold shunt assembly and the temperature sensor assembly are both installed on the crystallizer. The control terminal can be a computer or other terminal device, and it can be connected to the temperature sensor assembly via wired or wireless means to achieve data communication and transmission.

[0022] Specifically, the crystallizer includes an external housing 1, inside which are several crystallization plates 2 with identical structures arranged side by side. It should be noted that the shape of the housing 1 is set according to actual needs, for example, it can be a square structure. In one embodiment, each crystallization plate 2 is connected to a control manifold distribution assembly. In another embodiment, the several crystallization plates 2 are divided into multiple crystallization plate units, each crystallization plate unit consisting of at least two crystallization plates 2, and each crystallization plate unit is connected to a corresponding control manifold distribution assembly. This control manifold distribution assembly is used to control the heating of each crystallization plate 2 or each crystallization plate unit to be consistent with the overall heating of the crystallizer, ensuring uniform internal heat. It should be further noted that the crystallization plate units can be distinguished by setting different distances, or they can be separated into multiple crystallization plate units by using isolation plates that do not affect the heating of the crystallization plates 2. Materials that meet the isolation conditions can be preferred materials for the isolation plates, such as stainless steel and heat-resistant alloys. Furthermore, two sets of control manifold diversion components are provided, and the two sets of control manifold diversion components are respectively located on both sides of the crystallizer. Specifically, the control manifold diversion component includes a diverter, a switching valve 5, and several flow regulating valves 6. The diverter is used to ensure uniform flow rate, the switching valve 5 is used to control the flow channel opening and closing, and the flow regulating valves 6 are used to control the flow rate.

[0023] The distributor includes a main pipe 3 and branch pipes 4 connected to the main pipe 3. The main pipe 3 is connected to the heat exchange medium source, and the branch pipes 4 are connected to the crystallizing plates 2 inside the crystallizer. After passing through the distributor, the heat exchange medium source is divided into multiple channels and simultaneously transported to each crystallizing plate 2 through the branch pipes 4.

[0024] The branch pipes 4 of the distributors on both sides of the crystallizer are connected to crystallizing plates 2 (or crystallizing plate units) arranged crosswise. For example, the crystallizer has 20 crystallizing plates 2. Figure 1 As shown, the numbers from left to right are 1, 2, 3, ..., 20. The branch pipe located at the front of the crystallizer connects to crystallizing plates 2 numbered 1, 3, 5, ..., 19 via branch pipe 4, while the branch pipe located at the rear of the crystallizer connects to crystallizing plates 2 numbered 2, 4, 6, ..., 20 via branch pipe 4. This arrangement reduces the temperature difference between the front, back, left, and right sides inside the crystallizer through opposing and staggered flow.

[0025] The distributor is installed on the housing 1, and the branch pipes 4 connect to the inside of the housing 1. Each branch pipe 4 located outside the housing 1 is equipped with a flow regulating valve 6, which is connected to the control terminal. The flow regulating valves 6 can adjust the flow rate of each branch pipe 4, and further reduce the temperature difference between different areas by adjusting the flow rate based on temperature monitoring. Each main pipe 3 is equipped with a switch valve 5 to control the flow path.

[0026] By controlling the pipeline and flow rate, it can be ensured that the entire crystallizer and a single crystallization plate 2 or a single crystallization plate unit are heated uniformly. The purpose of ensuring heat transfer uniformity is to provide a heat transfer basis in the industrial naphthalene refining process. During the crystallization and sweating processes, it is ensured that the overall and local crystal nucleation, crystal growth, sweating and impurity removal inside the device are completely consistent, eliminating the problem of blind spots in the crystallization process. It should be noted that the crystallizing plate 2 is a plate structure with a hollow interior for the flow of the heat exchange medium. The crystallizing plate ensures that the internal circulating medium exhibits a turbulent flow pattern during operation, maximizing heat transfer and minimizing heat loss. In contrast, the traditional finned tube structure suffers from significant heat loss during internal circulation because the fluid flow inside the circular tube is direct-flow. The crystallizing plate 2 solves this problem.

[0027] On each crystallizing plate 2, an outlet is provided on the side opposite to the inlet of the heat exchange medium, such as... Figure 1 As shown, each branch pipe 4 on the rear side of the crystallizer is connected to an outlet pipe 9 on the front side of the crystallizing plate 2, through which the heat-exchanged medium is transported to the outside of the crystallizer. The branch pipe 4 on the front side of the crystallizer is connected to an outlet pipe 9 on the rear side of the crystallizing plate 2, through which the heat-exchanged medium is transported to the outside of the crystallizer.

[0028] The connection point between the branch pipe 4 and the crystallizing plate 2 should be set as high as possible, while the connection point between the outlet pipe 9 and the crystallizing plate 2 should be set as low as possible.

[0029] The crystallizer also has a feed inlet and a discharge outlet on its side wall. The positions of the feed inlet and discharge outlet can be adjusted according to actual needs. The specific structure is existing technology and will not be described in detail here. In addition, the crystallizer body is also equipped with other interfaces, such as exhaust valves, and other components, such as bottom support feet, all of which are set using existing technology.

[0030] In this embodiment, the temperature sensor assembly includes a first temperature sensor 7 and a second temperature sensor 8, both of which are connected to a control terminal. The first temperature sensor 7 is located outside the housing 1 and is mounted on a pipe, for example, on the main pipe 3 or on a branch pipe 4, to monitor the temperature of the material initially entering the pipe. The second temperature sensor 8 is located inside the housing 1 to monitor the internal temperature in real time. Multiple second temperature sensors 8 can be distributed in different areas inside the housing 1, allowing for precise monitoring of the internal temperature.

[0031] For example, taking the production of refined naphthalene from industrial naphthalene as an example, based on the different freezing points of the various components of the industrial naphthalene to be separated, the temperature of the initial liquid mixture is gradually reduced through sensor monitoring to achieve partial crystallization. The solid phase precipitated by crystallization has a different chemical composition from the residual liquid, thereby achieving the purpose of separation and purification. The driving force of the melt crystallization process is the supersaturation or supercooling of a certain component in the melt. The most important processes are crystallization and sweating. By adjusting the control manifold distribution component to control the steam addition and circulating water flow, the temperature of the crystallization chamber is dynamically controlled to ensure that each component crystallizes stepwise according to the difference in saturation, thereby improving product quality and process precision.

[0032] The above are merely embodiments of this utility model, described in a relatively specific and detailed manner, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A plate crystallizer device, characterized in that, include: A crystallizer, which has an internal space to contain the liquid to be crystallized; A control manifold diversion assembly is connected to the crystallizer and provides heat exchange medium to the crystallizer, while simultaneously diverting the heat exchange medium into the interior of the crystallizer. A temperature sensor assembly, used to measure the temperature inside the crystallizer and to control the temperature inside the manifold shunt assembly; The control terminal adjusts the flow rate of the heat exchange medium in real time by controlling the manifold distribution assembly based on the temperature monitored by the temperature sensor assembly, so as to make the temperature in the crystallizer uniform. The number of control manifold diversion components is two, and the two control manifold diversion components are respectively arranged on both sides of the crystallizer; the crystallizer contains multiple crystallization plates, and the crystallization plates into which the heat exchange medium is diverted by the two control manifold diversion components are alternately arranged.

2. The plate crystallizer apparatus according to claim 1, characterized in that, The crystallizer includes a box, which is square, and multiple crystallization plates are arranged inside the box in an array.

3. The plate crystallizer apparatus according to claim 2, characterized in that, The control manifold diversion assembly includes a diverter, a switching valve, and a flow regulating valve. The diverter includes a main pipe and multiple branch pipes. The main pipe is connected to a heat exchange medium source, and the branch pipes are connected to a crystallizing plate. The main pipe is equipped with the on / off valve, and each branch pipe is equipped with a flow regulating valve; The crystallizing plates connected by the branch pipes on both sides of the crystallizer are arranged alternately.

4. The plate crystallizer apparatus according to claim 3, characterized in that, An outlet is provided on the other side of the crystallizing plate connected to the branch pipe, and all outlets of the crystallizing plate connected to the same control manifold diversion assembly are connected to one outlet pipe.

5. The plate crystallizer apparatus according to claim 4, characterized in that, The connection point between the branch pipe and the crystallizing plate is located on the upper side wall of the crystallizing plate, and the connection point between the outlet pipe and the crystallizing plate is located on the lower side wall of the crystallizing plate.

6. The plate crystallizer apparatus according to claim 3, characterized in that, The temperature sensor assembly includes a first temperature sensor and a second temperature sensor. The first temperature sensor is disposed inside the main pipe, and the second temperature sensor is disposed inside the crystallizer.

7. The plate crystallizer apparatus according to claim 6, characterized in that, At least two second temperature sensors are provided, and the locations of the at least two second temperature sensors are different.

8. The plate crystallizer apparatus according to claim 1, characterized in that, The heat exchange medium is steam.

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