Cyclone separation structure, oxidation drying tower and oxidation drying system

Abstract

The present invention discloses a cyclone separation structure, an oxidation drying tower and an oxidation drying system. The cyclone separation structure includes N cyclone plates, where N≥2. The cyclone plates are arranged in sequence along their axial lines, and the spacing between adjacent cyclone plates is equal. Each cyclone plate is composed of n baffle plates with equal areas, where n≥4 and is an even number. Adjacent cyclone plates are horizontally rotated and staggered by a certain angle α around their axial lines, and α = 360° / n. By designing such a cyclone separation structure, the efficiency can be improved, and at the same time, the volume or occupied space of the equipment can be reduced to lower the cost. It can be applied to various towers, containers or cavities.

Description

Technical Field

[0001] The present invention belongs to the technical field of chemical equipment, and particularly relates to a cyclone separation structure, and also relates to an oxidation drying tower and an oxidation drying system including the cyclone separation structure. Background Art

[0002] In traditional chemical processes, reaction and drying (mainly including jet drying, cyclone drying, and centrifugal spray drying) equipment are usually carried out in different towers, and then different towers are connected. Generally, they are large in volume, occupy a high space, and have a low yield. Moreover, phenomena such as deflagration and explosion frequently occur during the drying process, resulting in low safety. With the development of technology, currently, multiple different functions are completed in the same tower for reaction and drying, but currently, it is mainly applied to fields such as pharmaceutical chemistry, pesticide chemistry, and dye chemistry, and mostly for small-scale production, with a yield generally within 50%.

[0003] In industrial production, when multiple chemical raw materials are put into reaction, due to different processes, the yield is extremely low. Summary of the Invention

[0004] In view of this, it is necessary for the present invention to provide a cyclone separation structure, such that the airflow passing through the cyclone separation structure is evenly divided into multiple airflows in the same plane and each airflow spirals or folds upward. On the one hand, it saves the equipment volume, can improve the reaction efficiency (such as drying, etc.), reduces the overall equipment volume, and saves costs and the occupied space of the equipment.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention first provides a cyclone separation structure, which includes:

[0007] N cyclone plates, where N≥2, the cyclone plates are arranged in sequence along their axial lines and the distance between adjacent cyclone plates is equal. Each cyclone plate is composed of n baffle plates with equal areas, n≥4 and n is an even number, and the air outlet directions of adjacent baffle plates are opposite;

[0008] Adjacent cyclone plates are horizontally rotated and staggered by a certain angle α along their axial lines, α = 360° / n.

[0009] The present invention further provides an oxidation drying tower, which includes:

[0010] An upper tower section for carrying out an oxidation reaction;

[0011] A lower tower section for recovering products;

[0012] A cyclone separation section connected between the upper tower section and the lower tower section, and the aforementioned cyclone separation structure is provided in the cyclone separation section;

[0013] and heat exchange tubes disposed in the oxidation drying tower, the heat exchange tubes penetrating through the cyclone separation section.

[0014] Furthermore, the radial cross-sectional area of the upper tower section is larger than that of the cyclone separation section, and a feeding port and an air outlet are provided at the upper end of the upper tower section.

[0015] Furthermore, the radial cross-sectional area of the lower tower section is smaller than or equal to that of the cyclone separation section. The lower tower section includes a recovery section at its bottom, and a discharge port and an air inlet are provided at the lower end of the recovery section.

[0016] Furthermore, the cyclone plate is composed of 4 baffle plates combined, the angle of the baffle plate is 45°, and adjacent cyclone plates are horizontally staggered by 90° in sequence.

[0017] Furthermore, the thickness of the cyclone plate is 60 - 80 mm.

[0018] Furthermore, the heat exchange tubes include:

[0019] an upper ring tube disposed around the outer side surface of the upper tower section;

[0020] a lower ring tube disposed around the outer side surface of the cyclone separation section;

[0021] a plurality of straight tubes located in the oxidation drying tower, the straight tubes penetrating through the cyclone separation section, one end of which is communicated with the upper ring tube and the other end of which is communicated with the lower ring tube.

[0022] Furthermore, the straight tubes are arranged in an array.

[0023] The present invention also provides an oxidation drying system, which includes:

[0024] the oxidation drying tower as described in any one of the foregoing;

[0025] a temperature sensing unit, the temperature sensing unit being disposed on the side wall of the lower tower section;

[0026] a heat exchange unit, the heat exchange unit including a transfer pump, a first storage tank storing a heat medium, and a second storage tank storing a cold medium. One port of the transfer pump is communicated with the inlet of the heat exchange tube, and the other port of the transfer pump is connected to the first storage tank and the second storage tank respectively through a three-way solenoid valve;

[0027] a hot air unit, the hot air unit including a fan and a hot air pipe connected in sequence, and the end of the hot air pipe far from the fan is communicated with the oxidation drying tower;

[0028] A program control unit, the input end of the program control unit is connected to the output end of the temperature sensing unit, and the output end of the program control unit is respectively connected to the heat exchange unit and the hot air unit.

[0029] Further, the transfer pump is a two-way pump;

[0030] The blower is a Roots blower.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The cyclone separation structure in the present invention enables the air flow passing through the cyclone separation structure to be evenly divided into multiple air flows in the same plane and each air flow spirals or folds upward. Compared with the traditional combined cyclone separator, the cyclone separation structure in the present invention can greatly save the equipment volume, save costs and the occupied space of the equipment, and can improve the reaction efficiency (such as drying, etc.).

[0033] The oxidation drying tower in the present invention improves the structure of the baffle of the cyclone separation section. By adopting a special cyclone separation structure, the air flow is evenly divided into multiple air flows in the same plane and each air flow is in a spiral or folded air flow form, so that the residence time of the drying body in the tower is prolonged, the drying time of the material can be effectively extended, and the yield of the reaction product can be significantly improved.

[0034] The oxidation drying tower can complete the reaction, heating, drying and recovery in the same tower, which reduces the overall equipment volume, saves costs and the occupied space of the equipment, greatly reduces the input cost, and improves the recovery rate and net content of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic plan view of the cyclone plate 10 in a preferred embodiment of the present invention;

[0036] Figure 2 is Figure 1 a schematic longitudinal sectional view of the cyclone plate 10 in

[0037] Figure 3 It is a schematic plan view of the cyclone plate 10 in another preferred embodiment of the present invention;

[0038] Figure 4 It is a schematic structural view of the oxidation drying tower 20 in a preferred embodiment of the present invention;

[0039] Figure 5 is Figure 4 a schematic internal structure view of the cyclone separation section 23 in

[0040] Figure 6 is Figure 4 a schematic wind direction view of the cyclone separation section 23 in

[0041] Figure 7 This is a schematic diagram of the connection structure of the oxidation drying system in a preferred embodiment of the present invention.

[0042] In the figure: cyclone plate 10, baffle plate 11;

[0043] Oxidation drying tower 20, upper tower section 21, lower tower section 22, cyclone separation section 23, heat exchange tubes 24, feeding port 211, air outlet 212, discharging port 221, air inlet 222, recovery section 223, upper ring pipe 241, lower ring pipe 242, straight pipe 243;

[0044] Fan 30, hot air pipe 31;

[0045] Delivery pump 40, first storage tank 41, second storage tank 42, three-way solenoid valve 43;

[0046] Temperature sensor 50;

[0047] Program control cabinet 60. Detailed implementation manners

[0048] The following will further elaborate on the cyclone separation structure, oxidation drying tower, and oxidation drying system provided by the present invention in conjunction with the accompanying drawings of the specification.

[0049] It should be noted that when an element is referred to as "fixed to", "arranged on", or "installed on" another element, it can be directly on the other element or indirectly on the other element. However, when an element is referred to as "connected to" or "linked to" another element, it can be directly connected to the other element or indirectly connected to the other element. Additionally, the connection generally refers to a fixing function, and here the fixing can be any conventional fixing method in the art, such as "threaded connection", "riveting", "welding", etc.

[0050] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings of the specification, and is only for the convenience of describing the embodiments of 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 or operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0051] One embodiment of the present invention discloses a cyclone separation structure, which includes N cyclone plates 10, where N≥2. The cyclone plates 10 are arranged in sequence along their axial lines, and the distance between adjacent cyclone plates 10 is equal. Each cyclone plate 10 is composed of n baffle plates 11 with equal areas, where n≥4 and is an even number, and the air outlet directions of adjacent baffle plates 11 are opposite; adjacent cyclone plates 10 are horizontally rotated and staggered by a certain angle α along their axial lines, and α = 360° / n. Specifically, the cyclone plates 10 are arranged in sequence along their axial lines. According to the direction of the cyclone plates 10, they can be arranged one by one vertically, or one by one horizontally. There is no special limitation and it can be adjusted according to needs. The number of cyclone plates 10 and the distance between adjacent cyclone plates 10 are not particularly limited and can be adjusted according to the length of the application tower or container, the required reaction duration, etc. Specifically, on the one hand, the number of cyclone plates 10 needs to be adjusted according to the length of the tower or container, and on the other hand, the reaction duration can be adjusted by adjusting the number or spacing of the cyclone plates 10. The cyclone plate 10 is composed of n baffle plates 11. Specifically, the baffle plates 11 are distributed in an array along the center of the cyclone plate 10. That is to say, the cyclone plate 10 is evenly divided by the baffle plates 11 along the center of the cyclone plate 10. The number of baffle plates 11 is not particularly limited and can be adjusted according to the required number of branched airflows and the planar structure of the cyclone plate 10, and can be 4, 6, 8, etc. Preferably, n is between 4 and 6, and more preferably, n = 4; further, the planar structure of the cyclone plate 10 is not particularly limited and can be selected according to the internal environment of the specific application container or cavity. Preferably, the planar structure of the cyclone plate 10 is circular, regular hexagon, regular octagon, etc. For example, when the cyclone plate 10 is circular, n can be 4, 6, 8, etc.; when the cyclone plate 10 is square, n can be 4; when the cyclone plate 10 is regular hexagon, n can be 6, and so on. The number of times the cyclone plate 10 is evenly divided by the baffle plates 11 needs to ensure that the cyclone plates 10 still coincide after each stagger. Further, the air outlet directions of adjacent baffle plates 11 are opposite, and adjacent cyclone plates 10 are horizontally rotated and staggered by a certain angle α along their axial lines, and α = 360° / n. Therefore, the airflow passing through this cyclone separation structure is evenly divided into n branched airflows in the horizontal direction and spirals or folds upward. Compared with the combined cyclone separator, this cyclone separation structure only requires one fan to achieve multi-airflow branching, without the need for multiple towers or containers. On the one hand, it improves the reaction efficiency while reducing costs, and on the other hand, it can greatly reduce the volume and occupied space of the equipment.

[0052] Figure 1 Figure 4 shows the planar structure of the cyclone plate 10 in a preferred embodiment of the present invention. The cyclone plate 10 is circular and is composed of 4 identical baffle plates 11 combined along the center of the cyclone plate 10, as Figure 2As shown in the figure, the air outlet directions of adjacent baffle plates 11 are opposite, and adjacent cyclone plates 10 are horizontally rotated and staggered by 90° along their axial lines, so that the air flow is evenly divided into 4 spiral air flows in the horizontal direction and spirally rises. Figure 3 FIG. is a schematic plan view of the cyclone plate 10 in another preferred embodiment of the present invention. The cyclone plate 10 is a regular hexagon and is composed of 6 identical baffle plates 11 combined along the center of the cyclone plate 10. Adjacent cyclone plates 10 are horizontally rotated and staggered by 60° along their axial lines, so that the air flow is evenly divided into 6 single air flows in the horizontal direction and spirally rises.

[0053] It should be noted that this cyclone separation structure can replace the combined cyclone separator and can also be applied to any tower, cavity or container that has a separation requirement and needs cyclone separation.

[0054] Furthermore, an oxidation drying tower 20 is disclosed in an embodiment of the present invention, and its specific structure is as Figure 4 As shown in the figure, the oxidation drying tower 20 includes an upper tower section 21, a lower tower section 22 and a cyclone separation section 23. The cyclone separation section 23 is connected between the upper tower section 21 and the lower tower section 22. A tower plate is provided between adjacent tower sections. The setting of the tower plate belongs to the conventional setting in the art, so it will not be specifically described here.

[0055] Furthermore, please continue to refer to Figure 4 , the upper tower section 21 is used for oxidation reaction. In this embodiment, the cross-sectional area of the upper tower section 21 is larger than the cross-sectional area of the cyclone separation section 23. As the tower body expansion section, there is sufficient reaction space to facilitate the full progress of the oxidation reaction. A feeding port 211 and an air outlet 212 are respectively provided at the upper end of the upper tower section 21. Among them, the feeding port 211 is used to add reactants, such as raw materials or catalysts, etc., into the oxidation drying tower 20, which can be adjusted according to different production needs, so it will not be specifically limited here. It can be understood that the positions of the feeding port 211 and the air outlet 212 can also be set on the side of the upper tower section 21. There is no special limitation on the position, and it can be adjusted according to needs as long as the purposes of feeding and air outlet can be achieved. In this embodiment, setting them both at the upper end is a most preferred scheme. More preferably, the air outlet 212 is located at the upper end of the upper tower section 21, and the air outlet 212 is provided on the axis of the oxidation drying tower 20.

[0056] Further, a recovery section 223 is provided at the bottom of the lower tower section 22. The recovery section 223 is used to recover the products after reaction and drying. An outlet 221 and an air inlet 222 are respectively provided at the lower end of the recovery section 223. Their positions are not particularly limited and can be adjusted as needed. Preferably, in this embodiment, the air inlet 222 is provided on the axis of the oxidation drying tower 20, so as to form a straight air duct with the air outlet 212, which is convenient for forming a uniform cyclone air duct when passing through the cyclone separation section 23. Further, the size of the lower tower section 22 is not particularly limited and can be adjusted as needed. In this embodiment, the cross-sectional area of the lower tower section 22 is less than or equal to the cross-sectional area of the cyclone separation section 23. Preferably, in this embodiment, the cross-sectional area of the recovery section 223 gradually becomes smaller from top to bottom, so as to facilitate the recovery of products. More preferably, in this embodiment, the inner side wall of the recovery section 223 is designed as a smooth arc transition section, which is more convenient for recovering products.

[0057] Please refer to Figure 4 and Figure 5 , the cyclone separation section 23 is connected between the upper tower section 21 and the lower tower section 22. N cyclone plates 10 are vertically distributed along the axis in the cyclone separation section 23, where N≥2. Here, the number of the cyclone plates 10 can be adjusted according to the height of the cyclone separation section 23 and the distance between adjacent cyclone plates 10. At least 2 are provided, and 10, 20, 27, etc. can also be provided. There is no particular limitation. Generally speaking, the more the number, the better the separation effect. The thickness of each cyclone plate 10 is a conventional thickness, preferably 60 - 80 mm. In this embodiment, the thickness of the cyclone plate 10 is 80 mm. Further, please refer to Figure 1 , each cyclone plate 10 is composed of n baffle plates 11 with equal areas, n≥4. Preferably, n is 4 or 6. More preferably, n = 4. In the same cyclone plate 10, the air outlet directions of adjacent baffle plates 11 are opposite, and adjacent cyclone plates 10 are horizontally staggered by a certain angle α in turn, α = 360° / n, so that the air duct passing through the cyclone separation section 23 is evenly divided into n directions of rotation in the horizontal plane, forming n single-airflow air ducts, so that the residence time of the dried body in the oxidation drying tower 20 is extended, thus achieving the effect of high yield. In this embodiment, each cyclone plate 10 is composed of 4 baffle plates 11 with equal areas. Specifically, as shown in Figure 1 , the four baffle plates 11 are spliced and combined into a cyclone plate 10, and the areas of the four baffle plates 11 are the same. In the same cyclone plate 10, the air outlet directions of adjacent baffle plates 11 are opposite. Please refer to Figure 2; and adjacent cyclone plates 10 are horizontally rotated and staggered by 90° in sequence around the axial line, so that the air ducts passing through the cyclone separation section 23 are evenly divided into four rotation directions in the horizontal plane. In the oxidation drying tower 20 of the present invention, the distance between adjacent cyclone plates 10, the number of cyclone plates 10, the number of baffle plates 11, and the angle of the baffle plates 11 can be adjusted to adjust the number of single airflows formed and the rotation degree of the single airflows, thereby realizing the adjustment of the yield. Preferably, in this embodiment, there are 4 cyclone plates 10, the angle of the baffle plates 11 is 45°, and adjacent cyclone plates 10 are horizontally staggered by 90° in sequence, so that the airflows are divided into four directions in the same circumference and rotate at 45°. The airflow rotation direction is as Figure 6 shown in. In this embodiment, the residence time of the dried body in the tower can be extended by more than 20 times, so as to achieve a high yield, and the yield can reach about 80%.

[0058] Furthermore, a heat exchange tube 24 is also provided in the oxidation drying tower 20. For details, please refer to Figure 4 and Figure 1 . The heat exchange tube 24 includes an upper ring tube 241, a lower ring tube 242, and a plurality of straight tubes 243. The upper ring tube 241 is arranged around the outer side surface of the upper tower section 21, and the lower ring tube 242 is arranged around the outer side surface of the lower tower section 22. There is no special limitation on the installation method of the upper ring tube 241 and the lower ring tube 242 outside the oxidation drying tower 20, and it can be installed in a conventional fixed installation method in the art, which will not be specifically elaborated here. Further, please continue to refer to Figure 4 . The straight tubes 243 are arranged in the oxidation drying tower 20, and the number thereof is not particularly limited and can be adjusted as needed. One end of the straight tube 243 is communicated with the upper ring tube 241, the other end of the straight tube 243 is communicated with the lower ring tube 242, and the straight tube 243 penetrates through the cyclone separation section 23, that is, the straight tube 243 penetrates through the cyclone plate 10. Further, the number of the straight tubes 243 is not particularly limited and can be adjusted according to heat exchange requirements, such as the amount of heat exchange, etc. Preferably, the straight tubes 243 are arranged in an array evenly in the horizontal plane to ensure the uniformity of heat exchange in the oxidation drying tower 20. During specific operation, heat exchange in the oxidation drying tower 20 is realized by introducing a heat medium or a cold medium into the heat exchange tube 24.

[0059] In this embodiment, an oxidation drying system is further provided. Please refer to Figure 7 . The oxidation drying system is composed of an oxidation drying tower 20, a temperature sensing unit, a heat exchange unit, a hot air unit, and a program control unit. By connecting each unit to the program control unit, automatic control of the oxidation drying reaction is realized.

[0060] Specifically, the temperature sensing unit refers to a device that can monitor the temperature inside the tower in real time and feedback the temperature. Any device in the art that can achieve temperature monitoring and feedback can be used. In this embodiment, the temperature sensing unit used is the temperature sensor 50. Specifically, the temperature sensor 50 is installed on the side wall of the lower tower section 22 for monitoring the temperature inside the oxidation drying tower 20. Its specific installation method is not particularly limited, and conventional installation in the art can be used, so it will not be elaborated here specifically.

[0061] The heat exchange unit includes a delivery pump 40, a first storage tank 41, a second storage tank 42, and a three-way solenoid valve 43. One port of the delivery pump 40 is connected to the heat exchange tube 24 of the oxidation drying tower 20, and the other port of the delivery pump 40 is respectively connected to the first storage tank 41 and the second storage tank 42 through the three-way solenoid valve 43. A heat medium is stored in the first storage tank 41, and a cold medium is stored in the second storage tank 42. When the temperature inside the oxidation drying tower 20 is insufficient, the first storage tank 41 and the delivery pump 40 are connected to deliver the heat medium into the heat exchange tube 24 to heat the oxidation drying tower 20; when the temperature inside the oxidation drying tower 20 is too high, the second storage tank 42 and the delivery pump 40 are connected to deliver the cold medium into the heat exchange tube 24 to cool the oxidation drying tower 20. It can be understood that the selection of the heat medium and the cold medium is not particularly limited, and conventional cold / hot media in the art can be used. In this embodiment, the heat medium is preferably hot oil, and the cold medium is preferably brine (such as sodium chloride brine). Preferably, in this embodiment, the delivery pump 40 is a two-way pump, so as to realize that the medium can be delivered into the heat exchange tube 24 and the medium in the heat exchange tube 24 can also be pumped back to the first storage tank 41 or the second storage tank 42 to achieve recycling.

[0062] Furthermore, the hot air unit in this oxidation drying system includes a fan 30 and a hot air pipe 31 connected in sequence, wherein the outlet of the hot air pipe 31 is connected to the air inlet 222 of the oxidation drying tower 20. The hot air is conveyed into the oxidation drying tower 20 through the fan 30 and the hot air pipe 31, and at the same time, it can cooperate with the heat exchange tube 24 to heat the oxidation drying tower 20. The type of the fan 30 is not particularly limited. Preferably, the Roots blower is used in this embodiment.

[0063] The oxidation drying system in this embodiment further includes a program control unit. The program control unit can be any device that can achieve programming and automatically control the connected components, such as a PLC controller, a computer program control device, etc. In this embodiment, a program control cabinet 60 is used. As Figure 7 shown in the figure, the input end of the program control cabinet 60 is connected to the output end of the temperature sensor 50, and the output end of the program control cabinet 60 is respectively connected to the three-way solenoid valve 43, the delivery pump 40, the fan 30, and the hot air pipe 31.

[0064] During specific operation, raw materials, catalysts, etc. are added into the upper tower section 21 through the feeding port 211 of the oxidation drying tower 20. Meanwhile, the transfer pump 40 is started, the first storage tank 41 is connected, and a heat medium at a specific temperature is transferred into the heat exchange tubes 24. The fan 30 and the hot air duct 31 are started to enable the raw materials to react at a set temperature. After the reaction, the temperature inside the oxidation drying tower 20 is transmitted to the program control cabinet 60 through the temperature sensor 50. The program control cabinet 60 extracts the heat medium in the heat exchange tubes 24 and transfers a cold medium into the heat exchange tubes 24 for cooling. Meanwhile, the fan 30 is started, and the cyclone separation section 23 is used to dry and recover the product. Since the oxidation drying tower 20 completes the reaction, heating, condensation, drying, and recovery in the same tower, it greatly saves the equipment volume, cost, and occupied space of the equipment, and has a high product recovery rate, which has practical promotion significance.

[0065] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0066] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. An oxidation drying tower, characterized in that, the oxidation drying tower comprises: an upper tower section for carrying out oxidation reaction; a lower tower section for recovering products; a cyclone separation section connected between the upper tower section and the lower tower section, and a cyclone separation structure is provided in the cyclone separation section; and heat exchange tubes provided in the oxidation drying tower, and the heat exchange tubes penetrate through the cyclone separation section; the cyclone separation structure comprises: N cyclone plates, wherein N≥2, the cyclone plates are arranged in sequence along their axial lines and the distance between adjacent cyclone plates is equal, each cyclone plate is composed of n baffle plates with equal areas, n≥4 and is an even number, and the air outlet directions of adjacent baffle plates are opposite; adjacent cyclone plates are horizontally rotated and staggered by a certain angle α around their axial lines, and α = 360° / n.

2. The oxidation drying tower according to claim 1, characterized in that, the radial cross-sectional area of the upper tower section is larger than that of the cyclone separation section, and a feeding port and an air outlet are provided at the upper end of the upper tower section.

3. The oxidation drying tower according to claim 1, characterized in that, the radial cross-sectional area of the lower tower section is smaller than or equal to that of the cyclone separation section, the lower tower section comprises a recovery section at its bottom, and a discharge port and an air inlet are provided at the lower end of the recovery section.

4. The oxidation drying tower according to claim 1, characterized in that, the cyclone plate is composed of 4 baffle plates, the angle of the baffle plate is 45°, and adjacent cyclone plates are horizontally staggered by 90° in sequence.

5. The oxidation drying tower according to claim 1, characterized in that, the thickness of the cyclone plate is 60 - 80 mm.

6. The oxidation drying tower according to claim 1, characterized in that, the heat exchange tube comprises: an upper ring tube arranged around the outer side of the upper tower section; a lower ring tube arranged around the outer side of the cyclone separation section; a plurality of straight tubes located in the oxidation drying tower, the straight tubes penetrate through the cyclone separation section, one end of each straight tube is communicated with the upper ring tube, and the other end of each straight tube is communicated with the lower ring tube.

7. The oxidation drying tower according to claim 6, characterized in that, the straight tubes are arranged in an array.

8. An oxidation drying system, characterized in that, it comprises: the oxidation drying tower according to any one of claims 1 - 7; a temperature sensing unit, and the temperature sensing unit is arranged on the side wall of the lower tower section; a heat exchange unit, the heat exchange unit comprises a delivery pump, a first storage tank storing a heat medium and a second storage tank storing a cold medium, one port of the delivery pump is communicated with the inlet of the heat exchange tube, and the other port of the delivery pump is connected with the first storage tank and the second storage tank respectively through a three-way solenoid valve; a hot air unit, the hot air unit comprises a fan and a hot air pipe connected in sequence, and the end of the hot air pipe far away from the fan is communicated with the oxidation drying tower; a program control unit, the input end of the program control unit is connected with the output end of the temperature sensing unit, and the output end of the program control unit is respectively connected with the heat exchange unit and the hot air unit.

9. The oxidation drying system according to claim 8, characterized in that, the delivery pump is a two-way pump; the fan is a Roots blower.

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