Adipic acid crystallization system

Abstract

This invention relates to the field of dryer technology, specifically to an adipic acid crystallization system, comprising a dryer with multiple guiding mechanisms internally. These guiding mechanisms are evenly distributed along a first direction within the drying chamber. Each guiding mechanism includes two guide plates, both of which are arc-shaped and mounted on the dryer. A fan is mounted on each guide plate. This adipic acid crystallization system, by incorporating guiding mechanisms within the dryer and utilizing fans on the guide plates, allows the surface-dried material to move faster under the propulsion of airflow, shortening its residence time within the drying chamber. Furthermore, as the surface material is discharged, the amount of material within the drying chamber gradually decreases, allowing the remaining material with higher moisture content to be heated more evenly, thus improving the uniformity of material drying.

Description

Technical Field

[0001] This invention relates to the field of drying technology, and more specifically to an adipic acid crystallization system. Background Technology

[0002] Adipic acid is an important organic dicarboxylic acid, a dicarboxylic acid of significant industrial importance, playing a crucial role in chemical production, organic synthesis, pharmaceuticals, and lubricant manufacturing. In the preparation of adipic acid crystals, the material is first cooled in a crystallizer to precipitate crystals. The crude crystallized product is then dried in a dryer to remove moisture, ensuring an accurate yield.

[0003] Vibrating fluidized bed dryers are a new type of high-efficiency fluidized bed drying equipment suitable for drying granular and powdery materials. The main unit generates directional and uniform vibration under the excitation force of the vibrating motor, causing the material to be thrown horizontally. Under the combined action of hot airflow and machine vibration, the material being dried forms a fluidized state. It has advantages such as easy operation, energy saving, and environmental protection, and has been widely used in the drying process for preparing adipic acid crystals.

[0004] In existing fluidized bed dryers, when drying adipic acid crystals, all materials are usually discharged from the outlet simultaneously. This cannot guarantee that all materials are dried to the required degree, and uneven drying is likely to occur, affecting the drying effect. Summary of the Invention

[0005] This invention provides an adipic acid crystallization system to solve the problem that existing dryers typically discharge all materials from the outlet simultaneously, which cannot guarantee that all materials are dried to the required degree, easily leading to uneven drying and affecting the drying effect.

[0006] The adipic acid crystallization system of the present invention adopts the following technical solution: An adipic acid crystallization system is used to dry materials to be dried, including a dryer, the dryer having a drying chamber inside, and an inlet and an outlet on the dryer. The material can enter the drying chamber from the inlet and be discharged from the outlet, and the material can move in a throwing shape in the drying chamber along a first direction, the first direction being the direction in which the material moves from the inlet side to the outlet side; the dryer has multiple guiding mechanisms inside, the multiple guiding mechanisms being evenly distributed in the drying chamber along the first direction, the guiding mechanism including two guiding plates, both of which are set in an arc shape, the two guiding plates are respectively installed on the dryer, the center side of the two guiding plates respectively pointing to the two inner side walls of the dryer, a fan is installed on the guiding plate, and each guiding plate is provided with at least one air outlet, the air outlet being close to the center side of the corresponding guiding plate, which can provide air flowing along the first direction and cause the material to flow towards the two inner side walls of the dryer respectively.

[0007] Furthermore, the drying chamber has a head end and a tail end, with the head end connected sequentially to the tail end in a second direction, which is vertical. The feed inlet is located on one side of the head end, and the discharge outlet has an open state and a closed state. When it is in the open state, the material can move from the feed inlet side to the discharge outlet side in the drying chamber and then be discharged. When it is in the closed state, the material moves from the feed inlet side to the discharge outlet side in the drying chamber and then returns to the feed inlet side. Initially, the discharge outlet is in the open state.

[0008] Furthermore, the drying chamber has a ring-shaped structure.

[0009] Furthermore, a drying plate is fixedly installed inside the dryer, and air holes are evenly distributed on the drying plate. After the material enters the drying chamber from the feed inlet, it will fall onto the drying plate.

[0010] Furthermore, the dryer has a ring structure, and there are two adjustment ports on the drying plate. The two adjustment ports are located on one side of the two inner sidewalls of the dryer along the third direction, which is the radial direction of the dryer. Adjustment plates are slidably installed at the adjustment ports and can slide along the adjustment ports. A humidity sensor is installed at the discharge port, and the adjustment ports are connected to the discharge port.

[0011] Furthermore, the guiding mechanism also includes multiple guide plates, which are located on the side of the guide plate away from the bottom wall of the dryer along a second direction, which is a vertical direction.

[0012] Furthermore, the guide plate has a first end and a second end. The first end is located on the side of the second end that is close to the bottom wall of the dryer along the second direction. The first end extends towards the second end along the first direction to form an arc-shaped structure. The distance from the first end to the drying plate along the second direction is a first preset value.

[0013] Furthermore, the dryer includes a housing and a top cover, the top cover being detachably mounted to the housing by a plurality of bolts.

[0014] Furthermore, it also includes a blower, an air heater, an induced draft fan, and a cyclone separator. A heat source inlet is provided on the casing, which is connected to the drying chamber. Multiple air outlets are provided on the top cover. The blower is connected to the air heater and the heat source inlet in sequence, and the blower can input air into the air heater. The blower is connected to multiple air outlets and the cyclone separator respectively.

[0015] Furthermore, the guide plate is fixedly installed on the dryer via a fixing plate.

[0016] The beneficial effects of this invention are as follows: The adipic acid crystallization system of this invention, by setting a guiding mechanism inside the dryer, dries the material as it moves forward. Simultaneously, because the centers of the two guide plates point towards the two inner walls of the dryer, fans mounted on the guide plates provide airflow to the material as it vibrates and moves. This allows the surface-dried material to move faster under the propulsion of the airflow, shortening its residence time in the drying chamber until it flows to the discharge port. Furthermore, the arc-shaped guide plates blow the material towards the two inner walls of the dryer, reducing the impact of moisture on the dried material. As the surface material is discharged, the amount of material in the drying chamber gradually decreases, allowing the remaining material with higher moisture content to be heated more evenly. The vibration time is also longer, resulting in more uniform particle size, and the material is gradually discharged under the action of the airflow, improving the uniformity of material drying. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of an adipic acid crystallization system according to the present invention;

[0019] Figure 2 This is a schematic diagram of the overall structure of an embodiment of an adipic acid crystallization system of the present invention (with the top cover removed);

[0020] Figure 3 This is a front view of the overall structure of an embodiment of an adipic acid crystallization system according to the present invention;

[0021] Figure 4 for Figure 3 Sectional view at point AA along the middle;

[0022] Figure 5 for Figure 3 Cross-sectional view at the middle edge BB;

[0023] Figure 6 for Figure 3 Sectional view at the center CC;

[0024] Figure 7 This is a schematic diagram of a guide plate for an embodiment of an adipic acid crystallization system of the present invention.

[0025] In the diagram: 100, dryer; 101, feed inlet; 102, discharge outlet; 110, shell; 111, drying plate; 112, heat source inlet; 120, top cover; 121, exhaust outlet; 130, regulating port; 140, regulating plate; 150, humidity sensor; 160, discharge baffle; 200, drying chamber; 300, guiding mechanism; 310, guide plate; 311, fixing plate; 320, air outlet; 330, baffle plate. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] An embodiment of the adipic acid crystallization system of the present invention, such as... Figures 1 to 7 As shown,

[0028] An adipic acid crystallization system for drying adipic acid crystals (hereinafter referred to as the material) includes a dryer 100, which has a drying chamber 200. The dryer 100 has an inlet 101 and an outlet 102. The material enters the drying chamber 200 through the inlet 101 and exits through the outlet 102. The material can move in a throwing motion within the drying chamber 200 along a first direction, which is the direction in which the material moves from the inlet 101 side to the outlet 102 side. Specifically, the dryer 100 is driven by a vibrating motor, which enables the material to move within the drying chamber 200 along the first direction. The vibrating motor is not shown in the attached drawings and is prior art.

[0029] The dryer 100 has multiple guiding mechanisms 300 inside, which are evenly distributed in the drying chamber 200 along a first direction. Each guiding mechanism 300 includes two guiding plates 310, both of which are arc-shaped. The two guiding plates 310 are fixedly installed on the dryer 100, and the center side of each guiding plate 310 points to the two inner sidewalls of the dryer 100. A fan is installed on the guiding plate 310, and each guiding plate 310 is provided with at least one air outlet 320. The air outlet 320 is close to the center side of its corresponding guiding plate 310, which can provide airflow along the first direction and cause the material to flow towards the two inner sidewalls of the dryer 100.

[0030] Specifically, the guide plate 310 is fixedly installed on the dryer 100 by the fixing plate 311. Each guide plate 310 is provided with six air outlets 320, and the number of air outlets 320 can be set as needed.

[0031] In this embodiment, a guiding mechanism 300 is provided inside the dryer 100. During use, after the material enters the drying chamber 200 from the feed inlet 101, it will accumulate at the feed inlet 101 and move in a throwing shape along the first direction in the drying chamber 200 under the drive of the vibration motor, so that the material is gradually dispersed. That is, the material will vibrate and move forward in the drying chamber 200. During the process of the material moving forward, the material is dried in the drying chamber 200.

[0032] Meanwhile, since the centers of the two guide plates 310 point to the two inner walls of the dryer 100 respectively, and the fans installed on the guide plates 310 provide airflow to the material as it vibrates and moves, the air outlet 320 allows the surface-dried material to move faster under the propulsion of the airflow, shortening its residence time in the drying chamber 200 until it flows to the discharge port 102 for discharge. Furthermore, the arc-shaped guide plates 310 blow the material closer to the two inner walls of the dryer 100, reducing the impact of moisture on the dried material. As the surface material is discharged, the amount of material in the drying chamber 200 gradually decreases, allowing the remaining material with higher moisture content to be heated more evenly and vibrated for a longer time. This results in more uniform particle size and gradual discharge under the action of the airflow, improving the uniformity of material drying.

[0033] Specifically, the dryer 100 includes a housing 110 and a top cover 120. The top cover 120 is detachably mounted on the housing 110 by multiple bolts. The drying chamber 200 is located inside the housing 110. The top cover 120 is provided with multiple exhaust ports 121. A drying plate 111 is fixedly installed inside the housing 110. The drying plate 111 has evenly distributed air holes. After the material enters the drying chamber 200 through the feed inlet 101, it falls onto the drying plate 111. A heat source inlet 112 is opened on the housing 110 and is connected to the drying chamber 200. The heat source can enter through the heat source inlet 112.

[0034] In this embodiment, an adipic acid crystallization system further includes a blower, an air heater, an induced draft fan, and a cyclone separator. The blower is connected in sequence to the air heater and a heat source inlet 112, allowing air to be drawn into the air heater. The heated air then passes through the drying plate 111 and enters the drying chamber 200 to dry the material. The induced draft fan is connected to multiple air outlets 320 and the cyclone separator, drawing out moisture from the drying chamber 200 and then recovering the material from the humid air using the cyclone separator. The blower, air heater, induced draft fan, and cyclone separator are all prior art and are not shown in the accompanying drawings.

[0035] In this embodiment, the drying chamber 200 has a head end and a tail end, with the head end and tail end connected sequentially along a second direction, which is a vertical direction. The feed inlet 101 is located on one side of the head end, and the discharge outlet 102 is located on one side of the tail end. The discharge outlet 102 has an open state and a closed state. When in the open state, the material can move from the feed inlet 101 side to the discharge outlet 102 side within the drying chamber 200 and then be discharged. When in the closed state, the material moves from the feed inlet 101 side to the discharge outlet 102 side within the drying chamber 200 and then returns to the feed inlet 101 side, continuing to circulate and dry within the drying chamber 200. Initially, the discharge outlet 102 is in the open state.

[0036] Furthermore, the drying chamber 200 can be a ring structure, or it can be a rectangular cavity. The specific shape of the drying chamber 200 is not limited, as long as it has the feature of the first and last ends being connected in sequence.

[0037] In this embodiment, by defining the shape of the drying chamber 200, after the material circulates once in the drying chamber 200 and moves from one side of the discharge port 102 to the other side, the material can continue to circulate and dry in the drying chamber 200 by switching the discharge port 102 to the closed state until the material is dried.

[0038] In this embodiment, the dryer 100 has a ring structure. Two adjustment ports 130 are provided on the drying plate 111, located on opposite sides of the inner wall of the dryer 100 along a third direction (radial direction). An adjustment plate 140 is slidably mounted at each adjustment port 130. The adjustment plate 140 is electrically controlled by a PLC, allowing it to slide along the adjustment port 130 and change its size. A humidity sensor 150 is installed at the discharge port 102, and the adjustment port 130 is connected to the discharge port 102.

[0039] In this embodiment, by setting up an adjustment port 130, an adjustment plate 140, and a humidity sensor 150, when the material circulates once in the drying chamber 200 and moves from the feed port 101 side to the discharge port 102 side, if the material flowing out from the adjustment port 130 cannot meet the drying requirements under the sensing of the humidity sensor 150, since the material near the two inner walls of the dryer 100 is blown by the fan, it can be considered that the dryness of the material near the two inner walls of the dryer 100 is higher than that of the material far away from the two inner walls of the dryer 100. Therefore, by driving the adjustment plate 140 to move, the adjustment plate 140 can close the adjustment port 130, that is, switch the discharge port 102 to the closed state, so that the material continues to dry in the drying chamber 200 until the discharged material meets the requirements.

[0040] Furthermore, a discharge baffle 160 is provided inside the dryer 100. The discharge baffle 160 is located on the side of the regulating port 130 close to the feed port 101 along the first direction, that is, the regulating port 130, the discharge baffle 160, and the feed port 101 are arranged sequentially along the first direction. The discharge baffle 160 is located on the side of the drying plate 111 away from the bottom wall of the dryer 100 along the second direction, and the discharge baffle 160 defines a circulation space between itself and the drying plate 111 in the second direction, which is a vertical direction, allowing material to pass through. By setting the discharge baffle 160, the dried material can be blocked, helping the dried material to be discharged and preventing the dried material from continuing to circulate in the drying chamber 200 under the action of the vibrating motor.

[0041] In this embodiment, the guiding mechanism 300 further includes a plurality of guide plates 330, which are located on the side of the guide plate 310 away from the inner bottom wall of the dryer 100 along a second direction, which is a vertical direction.

[0042] Furthermore, the guide plate 330 has a first end and a second end. The first end is located on the side of the second end that is close to the inner bottom wall of the dryer 100 along the second direction. The first end extends to the second end along the first direction to form an arc-shaped structure. The distance from the first end to the drying plate 111 along the second direction is a first preset value.

[0043] By setting the guide plate 330, the airflow blown by the fan is guided, preventing the airflow from dissipating within the drying chamber 200. Furthermore, the guide plate 330 is set as an arc-shaped plate, using the distance from its first end along the second direction to the drying plate 111 to limit the material passing through it, which can flatten the material, thereby increasing the surface area of ​​the material and accelerating the drying speed.

[0044] Based on the above embodiments, the specific working process is as follows:

[0045] When in use, the vibration motor is started and the material is fed into the drying chamber 200 through the feed inlet 101 and accumulates at the feed inlet 101. Driven by the vibration motor, the material moves in a throwing motion towards the discharge outlet 102 in the first direction within the drying chamber 200. The material is gradually dispersed, that is, the material will vibrate and move forward within the drying chamber 200. At the same time, the blower is started to input air into the air heater. The heated air will enter the drying chamber 200 through the drying plate 111 to dry the material.

[0046] As the material moves forward, the centers of the two guide plates 310 point towards the two inner walls of the dryer 100. Simultaneously activating the fans on the guide plates 310, the material vibrates and moves while the air outlet 320 provides airflow. This allows the surface-dried material to move faster under the propulsion of the airflow, shortening its residence time in the drying chamber 200 until it flows to the discharge port 102 for discharge. The arc-shaped guide plates 310 also guide the material closer to the two inner walls of the dryer 100, reducing the impact of moisture on the dried material. Furthermore, as the surface material is discharged, the amount of material in the drying chamber 200 gradually decreases, allowing the remaining material with higher moisture content to be heated more evenly and vibrated for a longer period. This results in more uniform particle size, and the material is gradually discharged under the airflow, improving the uniformity of drying.

[0047] After the material circulates once in the drying chamber 200 and moves from the feed port 101 to the discharge port 102, if the material flowing out from the regulating port 130 cannot meet the drying requirements under the sensing of the humidity sensor 150, since the material near the two inner walls of the dryer 100 is blown by the fan, it can be considered that the material near the two inner walls of the dryer 100 is drier than the material far from the two inner walls of the dryer 100. Therefore, the regulating plate 140 can be driven to close the regulating port 130, that is, the discharge port 102 is switched to the closed state, so that the material continues to dry in the drying chamber 200 until the discharged material meets the requirements.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adipic acid crystallization system for drying materials to be dried, characterized in that: The dryer includes a drying chamber with an inlet and an outlet. Material enters the drying chamber through the inlet and exits through the outlet, moving in a projectile motion along a first direction within the drying chamber. The first direction is the direction in which the material moves from the inlet to the outlet. The dryer also includes multiple guiding mechanisms evenly distributed along the first direction within the drying chamber. Each guiding mechanism includes two guide plates, both arc-shaped, mounted on the dryer with their centers pointing towards the drying chamber. The machine has two inner side walls, and a fan is installed on the guide plate. Each guide plate is provided with at least one air outlet. The air outlet is close to the center of the corresponding guide plate and can provide airflow along the first direction, so that the material flows to the two inner side walls of the dryer respectively. The drying chamber has a front end and a rear end. The front end is connected to the rear end in sequence around the second direction, which is a vertical direction. The feed port is located on the front end. The discharge port has an open state and a closed state. When it is in the open state, the material can move from the feed port side to the discharge port side in the drying chamber and then be discharged. When closed, the material moves from the inlet side to the outlet side within the drying chamber and then returns to the inlet side; initially, the outlet is open; the drying chamber has a ring structure; a drying plate is fixedly installed inside the dryer, with air holes evenly distributed on the drying plate. After the material enters the drying chamber from the inlet, it falls onto the drying plate; the dryer has a ring structure, and two adjustment ports are opened on the drying plate. The two adjustment ports are located on the two inner side walls of the dryer along a third direction, which is the radial direction of the dryer. Adjustment plates are slidably installed at the adjustment ports, and the adjustment plates can slide along the adjustment ports. A humidity sensor is installed at the outlet, and the adjustment port is connected to the outlet.

2. The adipic acid crystallization system according to claim 1, characterized in that: The guiding mechanism also includes multiple guide plates, which are located on the side of the guide plate away from the bottom wall of the dryer along a second direction, which is a vertical direction.

3. The adipic acid crystallization system according to claim 2, characterized in that: The guide plate has a first end and a second end. The first end is located on the side of the second end that is close to the bottom wall of the dryer along the second direction. The first end extends to the second end along the first direction to form an arc-shaped structure. The distance from the first end to the drying plate along the second direction is a first preset value.

4. The adipic acid crystallization system according to claim 1, characterized in that: The dryer includes a housing and a top cover, which is detachably mounted to the housing by a number of bolts.

5. The adipic acid crystallization system according to claim 4, characterized in that: It also includes a blower, an air heater, an induced draft fan, and a cyclone separator. The housing has a heat source inlet that is connected to the drying chamber. The top cover has multiple air outlets. The blower is connected to the air heater and the heat source inlet in sequence. The blower can input air into the air heater. The blower is connected to multiple air outlets and the cyclone separator.

6. The adipic acid crystallization system according to claim 1, characterized in that: The guide plate is fixedly installed on the dryer via a fixing plate.

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