Dehydration system of extrusion dehydrator

Abstract

The utility model discloses an extrusion dehydrator dehydration system which comprises a shell, a dehydration assembly is connected in the shell, a water collecting groove is formed in the inner bottom face of the shell in the length direction of the shell, the water collecting groove is formed below the dehydration assembly, the water collecting groove is formed in the length direction of the dehydration assembly, and an extrusion pushing assembly is connected in the dehydration assembly in a sleeved mode. The end of the extrusion pushing assembly is connected with a motor. Free water is introduced into low-medium-pressure and low-pressure areas to be discharged by utilizing the self-weight fluidity of the free water and the pressure difference of different areas formed by screw extrusion, so that the medium leakage is reduced, the dehydration effect of the extruder is improved, the product loss is reduced, the production efficiency of products in the extrusion dehydration process is improved, and the production cost is reduced. Equipment cleaning and maintenance and material waste are reduced, the product percent of pass is improved, the service life of equipment is prolonged, the maintenance cost is reduced, and the economic benefit of the equipment is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of macromolecular elastomer drying and dehydration equipment, in particular to a dehydration system of an extrusion dehydrator. Background Art

[0002] Dehydration of materials is a crucial process in numerous industrial fields, such as food processing, chemicals, mining, papermaking, and wastewater treatment. In the chemical industry, many chemical reaction products or raw materials often contain significant amounts of water. For example, in polymerization reactions, the polymer slurry must be dehydrated before it can be processed into finished products. Failure to remove this water effectively can alter the polymer's physical and chemical properties, such as its hardness and toughness, and thus fail to meet product performance requirements.

[0003] The centrifuge's high-speed rotation generates centrifugal force to remove moisture from the material. This method improves dewatering efficiency to a certain extent, but for some highly viscous materials, such as sticky sludge and highly concentrated chemical slurries, centrifugal force cannot effectively separate the water from the material. Furthermore, the high-speed rotation of the centrifuge causes significant wear and tear during operation, leading to high maintenance costs and safety risks, such as violent vibration caused by rotor imbalance. With the advancement of mechanical manufacturing technology, extrusion dewatering equipment has gradually become larger and more automated. Its basic principle is to apply external pressure, causing moisture to seep or squeeze out of the material due to a pressure differential. In this process, the material is placed between a filter medium with a certain porosity (such as a filter screen or filter cloth). The pressure exerted on the material forces the water to pass through the filter medium, while the solid material is retained. With the continuous expansion of industrial production and the increasing demand for product quality, the research and development of extrusion dewatering machines has continued to deepen, focusing on higher dewatering efficiency, wider material compatibility, and lower energy consumption. They have gradually become a key equipment in the material dewatering industry.

[0004] Most of the extrusion dehydrators currently in use adopt cage-type dehydration. However, during dehydration, the screw of the extruder continuously squeezes the elastomer, causing the elastomer in the cage to flow from high pressure to low pressure, resulting in varying degrees of medium leakage. In the case of medium leakage, the drainage gap of the cage may even be blocked, causing poor drainage, ultimately leading to excessive water content in the medium entering the downstream process, ultimately causing the drying process to fail and the water content of the product to exceed the standard. Utility Model Content

[0005] The utility model aims to provide a dehydration system for an extrusion dehydrator, which solves the problem of poor dehydration effect of the existing cage-type dehydration.

[0006] The technical solution adopted by the utility model is that the dehydration system of the extrusion dehydrator includes a shell, a dehydration component is connected to the shell, a water collecting trough is opened on the inner bottom surface of the shell along its length direction, the water collecting trough is arranged below the dehydration component, the water collecting trough is arranged along the length direction of the dehydration component, an extrusion pushing component is sleeved in the dehydration component, and the end of the extrusion pushing component is connected to the motor.

[0007] The utility model is also characterized in that:

[0008] The extrusion pushing component includes a screw, one end of which is connected to the motor. The screw is arranged in the dehydration component and is arranged along the length direction of the dehydration component.

[0009] The dehydration assembly includes a first cylinder, a second cylinder and a third cylinder connected in pairs from right to left. The first cylinder, the second cylinder and the third cylinder are all arranged in a shell. The screw passes through the first cylinder, the second cylinder and the third cylinder. The water collecting tank is arranged at the bottom of the first cylinder, the second cylinder and the third cylinder. The water collecting tank is arranged along the length direction of the first cylinder, the second cylinder and the third cylinder.

[0010] The first cylinder, the second cylinder and the third cylinder all adopt Johnson type dehydration cylinders.

[0011] The first cylinder, the second cylinder and the third cylinder are all composed of two half-piece connecting plates, and the two half-piece connecting plates are connected by bolts.

[0012] The pitches of the screws in the first barrel, the second barrel and the third barrel decrease in sequence.

[0013] The bottom of the third cylinder is configured as a conical structure, and the lower side of the bottom slope of the third cylinder is configured close to the second cylinder.

[0014] The inclination angle of the inclined surface of the third cylinder is 15°.

[0015] The beneficial effects of the utility model are:

[0016] The utility model discloses a dehydration system of an extrusion dehydrator, which utilizes the self-weight fluidity of free water and the pressure difference between different areas formed by screw extrusion to introduce free water into low-medium and low-pressure areas for discharge, thereby reducing medium leakage, improving the dehydration effect of the extruder, reducing product loss, improving the production efficiency of the product in the extrusion dehydration process, reducing equipment cleaning and maintenance and material waste, improving the product qualification rate, extending the service life of the equipment, reducing maintenance costs, and improving the economic benefits of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the dehydration system of the extrusion dehydrator of the utility model;

[0018] Figure 2This is a structural diagram of the dehydration components in the dehydration system of the extrusion dehydrator of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the third cylinder in the dehydration system of the extrusion dehydrator of the utility model.

[0020] In the figure: 1. Shell, 2. Water collecting tank, 3. Motor, 4. Screw, 5. First cylinder, 6. Second cylinder, 7. Third cylinder. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0022] The utility model provides a dehydration system for an extrusion dehydrator, such as Figure 1 As shown, it includes a shell 1, a dehydration component is connected to the shell 1, a water collecting trough 2 is opened on the inner bottom surface of the shell 1 along its length direction, the water collecting trough 2 is arranged below the dehydration component, and the water collecting trough 2 is arranged along the length direction of the dehydration component. An extrusion pushing component is sleeved in the dehydration component, and a motor 3 is connected to the end of the extrusion pushing component. The shell 1 is provided with a feed port to facilitate the entry of the elastomer material. The motor 3 is fixed by a support frame. The extrusion and pushing assembly in the dehydration assembly divides its inner cavity into three sections: low, medium and high pressure. The elastomer material enters the dehydration assembly from the side of the shell 1 near the motor 3. Driven by the extrusion and pushing assembly, the material enters the low-pressure end of the dehydration assembly into the high-pressure end. During the forward movement, the material is squeezed and dehydrated by the extrusion and pushing assembly. About 80% of the free water can be discharged after passing through the low and medium pressure ends. Due to the small extrusion pressure at the low and medium pressure ends, the elastomer will not be discharged with the free water. The discharged free water falls into the water collection tank 2 under the action of its own weight. A drainage hole is provided at the bottom of the water collection tank 2 to discharge the free water. The elastomer containing about 20% free water enters the high-pressure section. Due to the large extrusion pressure, the about 20% free water encapsulated in the elastomer is squeezed out of the high-pressure section. The distance of the high-pressure section is short, and there is no leakage of the elastomer. A discharge port is provided at the end of the shell 1 to facilitate the discharge of the dehydrated elastomer.

[0023] Example 1

[0024] The dehydration system of the extrusion dehydrator includes a shell 1, a dehydration component is connected to the shell 1, a water collecting trough 2 is provided on the inner bottom surface of the shell 1 along its length direction, the water collecting trough 2 is arranged below the dehydration component, and the water collecting trough 2 is arranged along the length direction of the dehydration component. An extrusion pushing component is sleeved in the dehydration component, and a motor 3 is connected to the end of the extrusion pushing component.

[0025] The extrusion and pushing assembly includes a screw 4, one end of which is connected to a motor 3. Screw 4 is located within the dehydration assembly and extends along its length. The end of screw 4, away from motor 3, is supported by a support member. Motor 3 drives screw 4 for rotation. The pitch of screw 4 decreases from right to left, squeezing and shearing the elastomer from weak to strong, dividing the dehydration assembly into three sections: low, medium, and high pressure.

[0026] Example 2

[0027] The dehydration system of the extrusion dehydrator includes a shell 1, a dehydration component is connected to the shell 1, a water collecting trough 2 is provided on the inner bottom surface of the shell 1 along its length direction, the water collecting trough 2 is arranged below the dehydration component, and the water collecting trough 2 is arranged along the length direction of the dehydration component. An extrusion pushing component is sleeved in the dehydration component, and a motor 3 is connected to the end of the extrusion pushing component.

[0028] The extrusion pushing assembly includes a screw 4, one end of which is connected to the motor 3. The screw 4 is arranged in the dehydration assembly and is arranged along the length direction of the dehydration assembly.

[0029] like Figure 2-3 As shown, the dehydration assembly includes a first barrel 5, a second barrel 6 and a third barrel 7 connected in pairs from right to left. The first barrel 5, the second barrel 6 and the third barrel 7 are all arranged in the shell 1, and the screw 4 passes through the first barrel 5, the second barrel 6 and the third barrel 7. The water collecting tank 2 is arranged at the bottom of the first barrel 5, the second barrel 6 and the third barrel 7, and the water collecting tank 2 is arranged along the length direction of the first barrel 5, the second barrel 6 and the third barrel 7. The screw pitch on the screw 4 in the first cylinder 5 is the largest, followed by the second cylinder 6, and the smallest in the third cylinder 7. The first cylinder 5, the second cylinder 6 and the third cylinder 7 are divided into the low, medium and high pressure sections of the dehydration component. The first cylinder 5, the second cylinder 6 and the third cylinder 7 are coaxially arranged and connected. The three cylinders are connected in pairs by connecting plates and bolts to form a complete dehydration component. The elastomer material first enters the first cylinder 5 and is squeezed and dehydrated by the screw 4. The free water falls into the sump 2 under the action of its own weight. The elastic material continues to move forward driven by the screw 4, passes through the second cylinder 6 and the third cylinder 7 in turn, and completes the extrusion and drainage.

[0030] Example 3

[0031] The dehydration system of the extrusion dehydrator includes a shell 1, a dehydration component is connected to the shell 1, a water collecting trough 2 is provided on the inner bottom surface of the shell 1 along its length direction, the water collecting trough 2 is arranged below the dehydration component, and the water collecting trough 2 is arranged along the length direction of the dehydration component. An extrusion pushing component is sleeved in the dehydration component, and a motor 3 is connected to the end of the extrusion pushing component.

[0032] The extrusion pushing assembly includes a screw 4, one end of which is connected to the motor 3. The screw 4 is arranged in the dehydration assembly and is arranged along the length direction of the dehydration assembly.

[0033] The dehydration assembly includes a first cylinder 5, a second cylinder 6 and a third cylinder 7 connected in pairs from right to left. The first cylinder 5, the second cylinder 6 and the third cylinder 7 are all arranged in the shell 1, and the screw 4 passes through the first cylinder 5, the second cylinder 6 and the third cylinder 7. The water collecting tank 2 is arranged at the bottom of the first cylinder 5, the second cylinder 6 and the third cylinder 7, and the water collecting tank 2 is arranged along the length direction of the first cylinder 5, the second cylinder 6 and the third cylinder 7.

[0034] The first cylinder 5, the second cylinder 6 and the third cylinder 7 are all Johnson type dehydration cylinders.

[0035] The first cylinder 5, the second cylinder 6 and the third cylinder 7 are each composed of two half-piece connecting plates, which are connected by bolts. The three cylinders are respectively composed of two half-piece connecting plates, and the whole is further connected by connecting plates and bolts to form a complete whole.

[0036] Example 4

[0037] The dehydration system of the extrusion dehydrator includes a shell 1, a dehydration component is connected to the shell 1, a water collecting trough 2 is provided on the inner bottom surface of the shell 1 along its length direction, the water collecting trough 2 is arranged below the dehydration component, and the water collecting trough 2 is arranged along the length direction of the dehydration component. An extrusion pushing component is sleeved in the dehydration component, and a motor 3 is connected to the end of the extrusion pushing component.

[0038] The extrusion pushing assembly includes a screw 4, one end of which is connected to the motor 3. The screw 4 is arranged in the dehydration assembly and is arranged along the length direction of the dehydration assembly.

[0039] The dehydration assembly includes a first cylinder 5, a second cylinder 6 and a third cylinder 7 connected in pairs from right to left. The first cylinder 5, the second cylinder 6 and the third cylinder 7 are all arranged in the shell 1, and the screw 4 passes through the first cylinder 5, the second cylinder 6 and the third cylinder 7. The water collecting tank 2 is arranged at the bottom of the first cylinder 5, the second cylinder 6 and the third cylinder 7, and the water collecting tank 2 is arranged along the length direction of the first cylinder 5, the second cylinder 6 and the third cylinder 7.

[0040] The first cylinder 5, the second cylinder 6 and the third cylinder 7 are all Johnson type dehydration cylinders.

[0041] The first cylinder 5 , the second cylinder 6 and the third cylinder 7 are all composed of two half-piece connecting plates, and the two half-piece connecting plates are connected by bolts.

[0042] The pitch of the screw 4 in the first barrel 5, second barrel 6, and third barrel 7 decreases in sequence. The pitch of the screw 4 in the first barrel 5 is the largest, followed by the second barrel 6, and the smallest in the third barrel 7, dividing the first barrel 5, second barrel 6, and third barrel 7 into the low, medium, and high pressure sections of the dehydration assembly.

[0043] The bottom of the third cylinder 7 is arranged as an inclined surface, and the lower side of the inclined surface of the bottom of the third cylinder 7 is arranged close to the second cylinder 6 .

[0044] The third cylinder 7 has an inclined surface with an angle of 15°. The bottom of the third cylinder 7 is set as an inclined surface. When the elastomer material is discharged from the third cylinder 7, the free water that has not yet been discharged flows into the second cylinder 6 under the action of the inclined surface and then falls into the water collection tank 2.

[0045] The working process of the dehydration system of the utility model extrusion dehydrator is as follows:

[0046] During operation, the elastomer feed is first drained in the first barrel 5 of the low-pressure section of the dehydration component. It is then extruded and conveyed by the screw 4, and the dehydrated elastomer is sent to the second barrel 6 of the medium-pressure section for drainage. It is then extruded and conveyed by the screw 4, and the dehydrated elastomer is sent to the third barrel 7 of the high-pressure section for drainage. The elastomer conveying process is a process in which the pitch of the screw 4 decreases from large to small, and the extrusion and shearing of the elastomer increase from weak to strong. After entering the device, the water-containing elastomer passes through the first barrel 5 and the second barrel 6 to discharge about 80% of the free water. Due to the low extrusion pressure, the elastomer will not be discharged along with the free water. The elastomer containing about 20% free water enters the third barrel 7 for drainage. Due to the high extrusion pressure, the free water contained in the elastomer is squeezed out. The remaining free water will flow back to the first barrel 5 and the second barrel 6 for discharge.

[0047] This new dehydration system utilizes the free water's own weight flowability and the pressure difference between different areas formed by screw extrusion to guide the free water into the low-medium and low-pressure areas for discharge, thereby preventing the medium from leaking out, improving the dehydration effect, reducing product loss, and increasing the production efficiency of the product in the extrusion dehydration process. It also improves equipment operating efficiency, reduces equipment cleaning and maintenance, and material waste, and increases product qualification rate. It also extends equipment service life, reduces maintenance costs, and improves equipment economic benefits.

Claims

1. The dehydration system of the extrusion dehydrator is characterized by: The invention comprises a shell (1), a dehydration component is connected to the shell (1), a water collecting trough (2) is provided on the inner bottom surface of the shell (1) along its length direction, the water collecting trough (2) is arranged below the dehydration component, the water collecting trough (2) is arranged along the length direction of the dehydration component, an extrusion pushing component is sleeved in the dehydration component, and a motor (3) is connected to the end of the extrusion pushing component.

2. The dehydration system of the extrusion dehydrator according to claim 1, characterized in that: The extrusion pushing assembly comprises a screw (4), one end of which is connected to the motor (3), and the screw (4) is arranged in the dehydration assembly, and the screw (4) is arranged along the length direction of the dehydration assembly.

3. The dehydration system of the extrusion dehydrator according to claim 2, characterized in that: The dehydration assembly comprises a first barrel (5), a second barrel (6) and a third barrel (7) which are connected in pairs from right to left. The first barrel (5), the second barrel (6) and the third barrel (7) are all arranged in a shell (1). The screw (4) passes through the first barrel (5), the second barrel (6) and the third barrel (7). The water collecting tank (2) is arranged at the bottom of the first barrel (5), the second barrel (6) and the third barrel (7). The water collecting tank (2) is arranged along the length direction of the first barrel (5), the second barrel (6) and the third barrel (7).

4. The dehydration system of the extrusion dehydrator according to claim 3, characterized in that: The first cylinder (5), the second cylinder (6) and the third cylinder (7) all adopt Johnson-type dehydration cylinders.

5. The dehydration system of the extrusion dehydrator according to claim 3, characterized in that: The first cylinder (5), the second cylinder (6) and the third cylinder (7) are each composed of two half-piece connecting plates, and the two half-piece connecting plates are connected by bolts.

6. The dehydration system of the extrusion dehydrator according to claim 3, characterized in that: The pitches of the screws (4) located in the first barrel (5), the second barrel (6) and the third barrel (7) decrease in sequence.

7. The dehydration system of the extrusion dehydrator according to claim 3, characterized in that: The bottom of the third cylinder (7) is arranged as an inclined surface, and the lower side of the inclined surface at the bottom of the third cylinder (7) is arranged close to the second cylinder (6).

8. The dehydration system of the extrusion dehydrator according to claim 6, characterized in that: The inclination angle of the inclined surface of the third cylinder (7) is 15°.

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