Temperature control ion exchange device and methanol production system

Abstract

The utility model provides a temperature control ion exchange device which comprises a tank body filled with ion exchange resin, and the periphery of the tank body is coated with a temperature control composite layer; the temperature control composite layer comprises a plurality of phase change patches which are uniformly distributed around the periphery of the tank body and a protective shell which encircles all the phase change patches; the phase-change patches are filled with photo-thermal phase-change materials, a light scattering plate is clamped between the adjacent phase-change patches, and the light scattering plate is connected with an external light taking device through a light guide medium. A temperature control composite layer is coated on the periphery of an ion exchange tank, so that ion exchange resin in the tank is cooled by means of automatic heat absorption of a phase change material in a high-temperature cooling stage and is heated by means of automatic latent heat release of the phase change material in a low-temperature heat preservation stage by means of the characteristics of the phase change material, and the temperature rise is assisted by photo-thermal phase change; and the temperature control regulation of the ion exchange device is realized. The utility model further provides a methanol production system based on the temperature control ion exchange device, and the concentration of trimethylamine in a methanol product is effectively controlled.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment, specifically to a temperature-controlled ion exchange device and a methanol production system. Background Technology

[0002] During the production of methanol from syngas, a small amount of trimethylamine is generated due to side reactions. This trimethylamine emits a foul odor and can affect the quality of some downstream methanol products.

[0003] To solve the above problems, ion exchange resins can be used to remove trimethylamine from methanol products, as shown in the literature "Summary of the Application of Guan Mao Amberlyst 40wet Ion Exchange Resin in Removing Trimethylamine Impurities from Methanol Products", which uses an ion exchange tank filled with ion exchange resin.

[0004] However, ion exchange resins require controlled temperatures during operation, generally within the optimal range of 20-40℃. Temperatures that are too high or too low will reduce the resin's exchange efficiency and stability. Currently, existing ion exchange tanks lack effective temperature control solutions. Summary of the Invention

[0005] To address the shortcomings of the existing technology, this utility model provides a temperature-controlled ion exchange device, which at least solves the problem of the lack of an effective temperature control solution for existing ion exchange tanks.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The first aspect of this utility model is to provide a temperature-controlled ion exchange device, comprising a tank filled with ion exchange resin, the outer periphery of which is covered by a temperature-controlled composite layer; the temperature-controlled composite layer comprises a plurality of phase change patches evenly distributed around the outer periphery of the tank and a protective shell surrounding all the phase change patches; the phase change patches are filled with photothermal phase change material, and a diffuser plate is sandwiched between adjacent phase change patches; the diffuser plate is connected to an external light-collecting device through a light-guiding medium to project the light beam collected by the light-collecting device onto the phase change patches located on both sides of the diffuser plate.

[0008] Optionally, two adjacent phase change patches are spaced apart to form a heat exchange cavity, which is connected to an external air source device, and the diffuser plate is also built into the heat exchange cavity.

[0009] Optionally, the outer periphery of the tank is further provided with a first flange plate and a second flange plate, and the temperature control composite layer is installed between the two flange plates.

[0010] Optionally, the first flange plate is also provided with an air guide pipe on the side away from the temperature control composite layer, which is connected to an external air source device. The air guide pipe is wrapped around the outer periphery of the tank body, and the air guide pipe has multiple air guide ports on the side facing the first flange plate, which pass through the first flange plate and are connected to the corresponding heat exchange chambers.

[0011] Optionally, the first flange plate and the second flange plate are each provided with a first connecting plate on opposite sides, and the phase change patch is provided with a second connecting plate at both the upper and lower ends, and the second connecting plate is fixedly connected to the first connecting plate by bolts.

[0012] Optionally, the protective housing is formed by at least two heat insulation plates.

[0013] Optionally, the second flange plate is provided with a slot on the side facing the first flange plate, one end of the heat insulation plate is threaded to the side of the first flange plate away from the tank body, and the other end of the heat insulation plate is inserted into the slot of the second flange plate.

[0014] A second aspect of this utility model is to provide a methanol production system, comprising a synthesis tower, a distillation tower, and a methanol storage tank connected in sequence; a first conveying pipeline and a second conveying pipeline are connected in parallel between the distillation tower and the methanol storage tank; a temperature-controlled ion exchange device as described in any of the above claims is provided in the second conveying pipeline; and a trimethylamine concentration detection device is also provided at the output end of the distillation tower.

[0015] The beneficial effects of this utility model include:

[0016] This utility model provides a temperature-controlled ion exchange device, comprising a tank filled with ion exchange resin, and a temperature-controlled composite layer covering the outer periphery of the tank. The temperature-controlled composite layer includes multiple phase change patches evenly distributed around the outer periphery of the tank and a protective shell surrounding all the phase change patches. Each phase change patch is filled with photothermal phase change material, and a diffuser plate is sandwiched between adjacent phase change patches. The diffuser plate is connected to an external light-collecting device via a photoconductive medium to project the light beam collected by the light-collecting device onto the phase change patches on both sides. By covering the ion exchange tank with a temperature-controlled composite layer, the latent heat absorption or release characteristics of the phase change material during the phase change process are utilized. This allows the ion exchange resin inside the tank to automatically absorb heat and cool down during the high-temperature cooling stage, and automatically release latent heat and heat up during the low-temperature holding stage. The photothermal phase change further assists in the heating, thus achieving temperature control of the ion exchange device. This application also provides a methanol production system based on this temperature-controlled ion exchange device, effectively controlling the trimethylamine concentration in the methanol product. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the temperature-controlled ion exchange device of this application;

[0018] Figure 2 This is a schematic diagram of the temperature-controlled composite layer of this application;

[0019] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a schematic diagram of the outer contour of the tank body in this application;

[0021] Figure 5 yes Figure 4 Enlarged view of point B in the middle;

[0022] Figure 6 This is a schematic diagram of the methanol production system of this application;

[0023] Figure label:

[0024] 1-Tank body, 2-Temperature control composite layer, 3-Protective shell;

[0025] 11-First flange plate, 12-Second flange plate, 13-First connecting plate, 14-Second connecting plate, 21-Phase change patch, 22-Diffuser plate, 23-Heat exchange cavity;

[0026] 100 - Synthesis tower, 200 - Distillation tower, 300 - Methanol storage tank. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0028] Please see Figure 1-3This application provides a temperature-controlled ion exchange device, including a tank 1 filled with ion exchange resin, and a temperature-controlled composite layer 2 covering the outer periphery of the tank 1. Specifically, the temperature-controlled composite layer 2 includes a plurality of phase change patches 21 evenly distributed around the outer periphery of the tank 1 and a protective shell 3 surrounding all the phase change patches 21. Generally, the protective shell 3 is formed by at least two heat insulation plates (not shown in the figure) to facilitate disassembly and assembly. The phase change patches 21 are filled with photothermal phase change material. Since the photothermal phase change material has the characteristic of absorbing or releasing latent heat during the phase change process, when the ion exchange resin in the tank needs to be cooled, heat is absorbed and stored as latent heat through the solid-to-liquid phase change of the phase change material. When the ion exchange resin in the tank needs to be kept warm, the photothermal phase change material can release latent heat through the liquid-to-solid phase change. A diffuser plate 22 is also sandwiched between adjacent phase change patches 21. The diffuser plate 22 is connected to an external light-collecting device through a photoconductive medium. When the ion exchange resin inside the tank needs to be kept warm or heated, the light beam collected by the light-collecting device is projected onto the phase change patches 21 located on both sides of the diffuser plate 22. The photothermal phase change material inside the patch converts the light energy into heat energy, which is then transferred to the ion exchange resin inside the tank through the contact surface between the phase change patch 21 and the tank body. Obviously, at least the outer shell of the phase change patch 21 facing the diffuser plate 22 is made of a light-transmitting material. The temperature control strategy of this device relies on the inherent properties of the phase change material to achieve automatic heat exchange, and also makes full use of light energy, a clean energy source, for auxiliary heating. Compared with traditional electric heating methods, this is lower in carbon emissions and safer (methanol is flammable and explosive).

[0029] Specifically, during the device cooling phase, since the phase change material will lose its cooling function after complete melting, to further improve the temperature control capability of the temperature-controlled composite layer 2, a traditional air thermal management scheme can be introduced based on the photothermal phase change material—see [link to relevant documentation]. Figure 3 Two adjacent phase change patches 21 are spaced apart to form a heat exchange cavity 23. The heat exchange cavity 23 is connected to an external cooling air device. When the phase change material is completely or partially melted, cooling air can be introduced to assist in cooling. Obviously, during the heat preservation stage of the device, when the photothermal phase change material is completely cured and under continuous light irradiation, if the temperature inside the tank still cannot be maintained within the suitable operating temperature range, the heat exchange cavity 23 can also be connected to an external hot air device to assist in heating by introducing hot air. The diffuser plate 22 is also built into the heat exchange cavity 23. The protective shell 3 can effectively prevent external dust or other debris from entering the heat exchange cavity 23, thereby affecting the beam path projected by the diffuser plate 22.

[0030] For further improvements to the above scheme, please refer to Figure 4-5The tank body 1 is provided with a first flange plate 11 and a second flange plate 12 to install the temperature control composite layer 2 between the two flange plates. Preferably, the first flange plate 11 is also provided with an air guide pipe (not shown in the figure) connected to an external air source device on the side opposite to the temperature control composite layer 2. The air guide pipe is wrapped around the outer periphery of the tank body 1, and the air guide pipe has multiple air guide ports on the side facing the first flange plate 11, which pass through the first flange plate 11 and are connected to the corresponding heat exchange chamber 23.

[0031] For further improvements to the above scheme, please refer to Figure 4-5 The first flange plate 11 and the second flange plate 12 are each provided with a first connecting plate 13 on opposite sides, and the phase change patch 21 is provided with a second connecting plate 14 at both the upper and lower ends. The second connecting plate 14 and the first connecting plate 13 are fixedly connected by bolts. The design of the first and second connecting plates allows the phase change patch 21 to be pressed tightly against the outer wall of the tank by tightening the bolts during installation, thereby ensuring the contact area between the two and improving the heat exchange efficiency.

[0032] For further improvements to the above scheme, please refer to Figure 5 The second flange plate 12 also has a slot on the side facing the first flange plate 11. One end of the heat insulation plate is threaded to the side of the first flange plate 11 away from the tank body 1, and the other end of the heat insulation plate is inserted into the slot of the second flange plate 12. By using a slot insertion at one end and a screw connection at the other end, the heat insulation plate can be more easily disassembled and installed.

[0033] This utility model also provides a methanol production system based on the temperature-controlled ion exchange device described in any of the above claims. Since this methanol production system employs the aforementioned temperature-controlled ion exchange device, it also possesses the beneficial effects of the aforementioned temperature-controlled ion exchange device. For details, please refer to... Figure 6 This system includes a synthesis tower 100, a distillation tower 200, and a methanol storage tank 300 connected in sequence. Crude methanol is prepared by the synthesis reaction of syngas in the synthesis tower 100, and high-purity methanol is obtained by distillation of the crude methanol in the distillation tower 200. A first and a second conveying pipeline are connected in parallel between the distillation tower 200 and the methanol storage tank 300. The second conveying pipeline is equipped with a temperature-controlled ion exchange device as described above. Specifically, the output end of the distillation tower 200 is also equipped with a trimethylamine concentration detection device (not shown in the figure), so that the processor built into or connected to the production system can determine the opening and closing control strategy of the two conveying pipelines based on the data feedback from the trimethylamine concentration detection device: generally, when the trimethylamine concentration is higher than a set threshold, the ion exchange device is activated, i.e., the second conveying pipeline is opened and the first conveying pipeline is closed; and when the trimethylamine concentration is lower than the set threshold, the ion exchange device is deactivated, i.e., the first conveying pipeline is opened and the second conveying pipeline is closed.

[0034] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A temperature-controlled ion exchange device, characterized in that, The device includes a tank (1) filled with ion exchange resin, and a temperature-controlled composite layer (2) covering the outer periphery of the tank (1). The temperature-controlled composite layer (2) includes multiple phase change patches (21) evenly distributed around the outer periphery of the tank (1) and a protective shell (3) surrounding all the phase change patches (21). The phase change patches (21) are filled with photothermal phase change material, and a diffuser plate (22) is sandwiched between adjacent phase change patches (21). The diffuser plate (22) is connected to an external light-collecting device through a light-guiding medium to project the light beam collected by the light-collecting device onto the phase change patches (21) located on both sides of the diffuser plate (22).

2. The temperature-controlled ion exchange device according to claim 1, characterized in that, Two adjacent phase change patches (21) are spaced apart to form a heat exchange cavity (23), which is connected to an external air source device, and the diffuser plate (22) is also built into the heat exchange cavity (23).

3. The temperature-controlled ion exchange device according to claim 1 or 2, characterized in that, The tank body (1) is also provided with a first flange plate (11) and a second flange plate (12) on its outer periphery, and the temperature control composite layer (2) is installed between the two flange plates.

4. The temperature-controlled ion exchange device according to claim 3, characterized in that, The first flange plate (11) is also provided with an air duct connected to an external air source device on the side away from the temperature control composite layer (2). The air duct is wrapped around the outer periphery of the tank body (1), and multiple air ducts are opened on the side of the air duct facing the first flange plate (11) and are connected to the corresponding heat exchange chamber (23) after passing through the first flange plate (11).

5. The temperature-controlled ion exchange device according to claim 4, characterized in that, The first flange plate (11) and the second flange plate (12) are respectively provided with a first connecting plate (13) on their opposite sides, and the phase change patch (21) is respectively provided with a second connecting plate (14) at both the upper and lower ends. The second connecting plate (14) and the first connecting plate (13) are fixedly connected by bolts.

6. The temperature-controlled ion exchange device according to claim 3, characterized in that, The protective shell (3) is formed by at least two heat insulation plates.

7. The temperature-controlled ion exchange device according to claim 6, characterized in that, The second flange plate (12) is provided with a slot on the side facing the first flange plate (11). One end of the heat insulation plate is threadedly connected to the side of the first flange plate (11) away from the tank body (1), and the other end of the heat insulation plate is inserted into the slot of the second flange plate (12).

8. A methanol production system, characterized in that, The device includes a synthesis tower (100), a distillation tower (200), and a methanol storage tank (300) connected in sequence; a first delivery pipeline and a second delivery pipeline are connected in parallel between the distillation tower (200) and the methanol storage tank (300); the second delivery pipeline is equipped with a temperature-controlled ion exchange device as described in any one of claims 1-7; and the output end of the distillation tower (200) is also equipped with a trimethylamine concentration detection device.

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