A circulating vibrating screen material drying and homogenizing integrated system

Abstract

The utility model discloses a kind of circulation formula vibrating screen material drying homogenization integrated system, belong to modified plastic processing equipment technical field, including three outlet vibrating screen, the three outlet vibrating screen is connected with conical bottom material drying homogenization tank, for normal material screening, the three outlet vibrating screen is connected with vacuum feeding machine, for guiding normal material into conical bottom material drying homogenization tank, the vacuum feeding machine is connected with conical bottom material drying homogenization tank;The utility model can vibrate and screen material particles in the homogenization process.

Description

Technical Field

[0001] This utility model belongs to the technical field of modified plastic processing equipment, and in particular relates to a circulating vibrating screen drying and homogenization integrated system. Background Technology

[0002] After modified plastics are extruded and pelletized, in order to ensure product quality, they need to be introduced into a drying tank to dry the pellets by heating, which can reduce the moisture content of the material and remove odors. At the same time, the material is stirred to make it homogenous. However, since a lot of dust is generated during the homogenization process, the material needs to be vibrated and screened after homogenization. However, the homogenization and vibrating screening processes are separated, resulting in serious dust pollution and poor appearance quality of the material pellets. A structure that can vibrate and screen the material pellets during the homogenization process is proposed. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a circulating vibrating screen drying and homogenization integrated system, which solves the aforementioned problems.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a circulating vibrating screen drying and homogenizing integrated system, including a three-outlet vibrating screen, the three-outlet vibrating screen being connected to a conical bottom drying and homogenizing tank for screening normal materials, the three-outlet vibrating screen being connected to a vacuum feeder for introducing normal materials into the conical bottom drying and homogenizing tank, and the vacuum feeder being connected to the conical bottom drying and homogenizing tank.

[0005] Beneficial effects

[0006] This utility model provides a circulating vibrating screen drying and homogenization integrated system, which has the following advantages compared with the prior art:

[0007] In the cyclic vibration homogenization mode, after the material is heated and dried in the cone-bottom drying homogenization tank, it enters the three-outlet vibrating screen through the discharge port A. After entering the upper screen, the dust inside the material falls through the front screen of the upper screen to the lower screen, and is sucked into the dust outlet through the dust removal slits on the side of the lower screen, and then enters the negative pressure dust removal module. Normal material falls through the rear screen of the upper screen to the lower screen, and then enters the normal material outlet through the lower screen. It is then guided back into the cone-bottom drying homogenization tank by the vacuum feeder for homogenization again. The above process is repeated until homogenization reaches the standard. After homogenization reaches the standard, the cyclic suction module is closed and the discharge port B connected to the cone-bottom drying homogenization tank is opened, so that the material is directly discharged from the cone-bottom drying homogenization tank. At the same time, coarse material enters the coarse material outlet after passing through the rear screen of the upper screen. Attached Figure Description

[0008] Figure 1This is a schematic diagram of the process structure of this utility model. Detailed Implementation

[0009] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0010] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0011] Please see Figure 1 This utility model provides an embodiment of a circulating vibrating screen drying and homogenizing integrated system, including a three-outlet vibrating screen connected to a conical bottom drying and homogenizing tank for screening normal materials, a vacuum feeder connected to a conical bottom drying and homogenizing tank for introducing normal materials into the tank; the vacuum feeder has a vacuum degree of -0.04 to -0.06 MPa.

[0012] Specifically, the three-outlet vibrating screen includes an upper screen and a lower screen. The upper screen is divided into front and rear sections. The front screen has a 2mm aperture for separating powder, and the rear screen has a 5mm aperture for screening normal particles. The lower screen has no mesh and has dust removal slits on its sides. The three-outlet vibrating screen is connected to a linkage control module. The screen body of the three-outlet vibrating screen is welded from Q345B steel plate with a side plate thickness of 6mm. The screen mesh is made of 304 stainless steel perforated plate (2mm thick), and the vibrating motor has a power of 1.1kW.

[0013] Specifically, the three-outlet vibrating screen also includes a powder outlet, a normal material outlet, and a coarse material outlet. The powder outlet is connected to the dust removal slit, the normal material outlet is connected to the end of the lower screen, and the coarse material outlet is connected to the end of the upper screen.

[0014] Specifically, a receiving hopper is provided between the three-outlet vibrating screen and the vacuum feeder. The receiving hopper is connected to the normal material outlet and is used to receive normal material. The receiving hopper is also connected to the vacuum feeder.

[0015] Specifically, the bottom of the cone-bottom drying and homogenizing tank is provided with a discharge port A, which is connected to a three-outlet vibrating screen via a silicone flexible connector to achieve a sealed connection with the three-outlet vibrating screen. The cone-bottom drying and homogenizing tank is provided with a discharge port B on one side and a discharge port C on the other side. The discharge port C is connected to a vacuum feeder, and discharge valves are connected to discharge ports A, B, and C.

[0016] Specifically, the cone-bottom drying and homogenizing tank is equipped with a stirring module. The stirring module has a stirring shaft diameter of 80mm and is equipped with 3 layers of inclined paddle blades with an adjustable speed range of 20-60rpm.

[0017] Specifically, the powder outlet is connected to a negative pressure dust collection module for attracting powder through negative pressure. The negative pressure dust collection module includes a cyclone separator, a bag filter, and a centrifugal fan. The outlet of the cyclone separator is connected to the inlet of the bag filter, and the outlet of the bag filter is connected to the inlet of the centrifugal fan. The centrifugal fan generates centrifugal force through a high-speed rotating impeller, converting the kinetic energy of the gas into pressure energy to achieve gas transport and pressurization. The cyclone separator pre-separates dust ≥10μm (efficiency ≥85%), the bag filter has a filtration accuracy of 5μm, and the exhaust gas emission concentration is <10mg / m³. 3 After entering the dust outlet, the dust is drawn into the negative pressure dust removal module by the negative pressure airflow. The cyclone separator and the bag filter complete the dust removal through a graded treatment mode of "first coarse separation by the cyclone separator, and then fine filtration by the bag filter".

[0018] Dust-laden gas enters the cyclone separator under the negative pressure generated by the centrifugal fan. Guided by the tangential inlet, it rotates at high speed (forming an "outer vortex"). Since the density of dust particles is much greater than that of gas, the centrifugal force on the dust particles during rotation is much greater than that on gas molecules. They are forced to be thrown against the inner wall of the cyclone separator, while the gas molecules, due to their small mass and small centrifugal force, continue to rotate with the airflow. Finally, the dust particles lose kinetic energy after colliding with the inner wall of the cyclone separator and slide down the inner wall of the cyclone separator under the action of gravity. The gas forms an "inner vortex" in the central area and is discharged upward to the bag filter, achieving the initial separation of dust and gas.

[0019] The bag filter relies on filter bags to intercept and filter dust: when dust-laden gas passes through, the dust is intercepted by the filter bag fibers, and clean gas is discharged. The initial dust layer formed on the surface of the filter bag can enhance the filtration effect. Regular cleaning is required to ensure air permeability and filtration efficiency.

[0020] Specifically, the linkage control module includes a differential pressure sensor installed on both the upper and lower sides of the screen. When the screen becomes clogged, material accumulates on the screen, and the pressure acting on the differential pressure sensor on the upper side of the screen gradually increases, thus generating a differential pressure between the upper and lower sides of the screen. The differential pressure sensor is connected to a PLC controller, which is also connected to the discharge valves on discharge ports A, B, and C. The PLC controller is connected to an audible and visual alarm, the vibration motor of the three-outlet vibrating screen, the stirring module, and the vacuum feeder. Furthermore, the PLC controller is connected to a temperature sensor inside the cone-bottom drying and homogenizing tank. The PLC controller is a Siemens S7-1200, and the compatible touchscreen is a 10-inch Kunlun Tongtai. The differential pressure sensor has a range of 0-50 kPa and an accuracy of ±1% FS.

[0021] In the above implementation, during operation, the PLC controller displays in real time the temperature inside the cone-bottom drying and homogenizing tank, the vibration frequency of the three-outlet vibrating screen, the stirring speed of the stirring module, and the screen pressure difference. When the pressure difference sensor detects that the pressure difference between the upper and lower sides of the screen is >15kPa, the PLC controller automatically reduces the vibration frequency of the three-outlet vibrating screen to 1500rpm and reduces the stirring module speed by 10%. If the pressure difference does not subside after 10 seconds, the machine will stop, and an audible and visual alarm will sound to remind the user to clean the screen.

[0022] In the above embodiments, the discharge valves on discharge ports A, B, and C are all closed under the control of the PLC controller, which means the material is in the homogenization and drying mode, and the material is homogenized in the cone-bottom drying and homogenization tank. When the discharge valve in discharge port A is opened, the material is in the circulating vibration homogenization mode, and the material returns to the cone-bottom drying and homogenization tank through the three-outlet vibrating screen and the vacuum feeder. When the discharge valve in discharge port B is opened, the material is in the discharge mode, and the material in the cone-bottom drying and homogenization tank is discharged. When the discharge valve C is opened, the material is in the circulating homogenization mode, and the material flows out and returns directly to the cone-bottom drying and homogenization tank through the vacuum feeder.

[0023] In this embodiment, under the cyclic vibration homogenization mode, after the material is heated and dried in the cone-bottom drying homogenization tank, it enters the three-outlet vibrating screen through the discharge port A. After entering the upper screen, the dust inside the material falls through the front screen of the upper screen to the lower screen, and is sucked into the dust outlet through the dust removal slit on the side of the lower screen, and then enters the negative pressure dust removal module through the dust outlet. Normal material falls through the rear screen of the upper screen to the lower screen, and enters the normal material outlet through the lower screen. It is then guided back into the cone-bottom drying homogenization tank by the vacuum feeder for homogenization again. The above process is repeated until homogenization reaches the standard. After homogenization reaches the standard, the cyclic suction module is closed and the discharge port B connected to the cone-bottom drying homogenization tank is opened, so that the material is directly discharged from the cone-bottom drying homogenization tank. At the same time, coarse material enters the coarse material outlet after passing through the rear screen of the upper screen.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] The term "fixed connection" as used in this application refers to a connection in which parts or components are fixed without any relative movement. This includes both detachable and non-detachable connections.

[0026] (1) Detachable connection: The components are fixed together using screws, splines, wedges, etc. This type of connection can be disassembled during maintenance without damaging the parts. However, the specifications of the connecting parts used must be correct (such as the length of the bolts, keys, wedges) and properly tightened.

[0027] (2) Non-removable connections: These mainly refer to welding, riveting, and tenon joints. Since disassembly requires forging, sawing, or oxyacetylene cutting for repair or replacement, the parts generally cannot be reused. At the same time, attention should be paid to workmanship, technical inspection, and remedial measures (such as correction and polishing) during connection.

[0028] The sliding connection referred to in this application means that the component can slide along a linear trajectory, and the hinge referred to in this application means that the component can rotate along an axial constraint.

[0029] In some cases, the sliding connection and hinge referred to in this application may also be damped, enabling the component to maintain in the desired position.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A circulating vibrating screen drying and homogenization integrated system, characterized in that, It includes a three-outlet vibrating screen, which is connected to a cone-bottom drying and homogenizing tank for screening normal materials. The three-outlet vibrating screen is also connected to a vacuum feeder, which is connected to the cone-bottom drying and homogenizing tank for introducing normal materials into the tank.

2. The integrated system for circulating vibrating screen drying and homogenization according to claim 1, characterized in that, The three-outlet vibrating screen includes an upper screen and a lower screen. The upper screen is divided into front and rear sections. The aperture of the front screen is 2mm, which is used to separate powder. The aperture of the rear screen is 5mm, which is used to screen normal particles. The lower screen has no mesh and has dust removal slits on its side. The three-outlet vibrating screen is connected to a linkage control module.

3. The integrated system for circulating vibrating screen drying and homogenization according to claim 2, characterized in that, The three-outlet vibrating screen also includes a powder outlet, a normal material outlet, and a coarse material outlet. The powder outlet is connected to a dust removal slit, the normal material outlet is connected to the end of the lower screen, and the coarse material outlet is connected to the end of the upper screen.

4. The integrated system for circulating vibrating screen drying and homogenization according to claim 2, characterized in that, A receiving hopper is provided between the three-outlet vibrating screen and the vacuum feeder. The receiving hopper is connected to the normal material outlet and is used to receive normal material. The receiving hopper is also connected to the vacuum feeder.

5. The integrated system for circulating vibrating screen drying and homogenization according to claim 1, characterized in that, The bottom of the cone-bottom drying and homogenizing tank is provided with a discharge port A. The discharge port A is connected to the three-outlet vibrating screen through a silicone flexible connector to achieve a sealed connection with the three-outlet vibrating screen. The side of the cone-bottom drying and homogenizing tank is provided with a discharge port B, and the other side of the cone-bottom drying and homogenizing tank is provided with a discharge port C. The discharge port C is connected to a vacuum feeder. The discharge ports A, B and C are all connected with discharge valves.

6. The integrated system for circulating vibrating screen drying and homogenization according to claim 1, characterized in that, The conical bottom material homogenization tank is equipped with a stirring module. The stirring module has a stirring shaft diameter of 80mm and is equipped with 3 layers of inclined blades with an adjustable speed range of 20-60rpm.

7. The integrated system for circulating vibrating screen drying and homogenization according to claim 2, characterized in that, The powder outlet is connected to a negative pressure dust removal module for attracting powder by negative pressure. The negative pressure dust removal module includes a cyclone separator, a bag filter, and a centrifugal fan.

8. The integrated system for circulating vibrating screen drying and homogenization according to claim 3, characterized in that, The linkage control module includes a differential pressure sensor, which is installed on both the upper and lower sides of the screen.

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