CN112123623A

CN112123623A - Underwater granulator capable of effectively filtering waste scraps

Info

Publication number: CN112123623A
Application number: CN202010937160.4A
Authority: CN
Inventors: 刘绍兴; 李花
Original assignee: Guangdong Jucheng Intelligent Technology Co Ltd
Current assignee: Guangdong Jucheng Intelligent Technology Co Ltd
Priority date: 2020-09-08
Filing date: 2020-09-08
Publication date: 2020-12-25
Anticipated expiration: 2040-09-08
Also published as: CN112123623B

Abstract

The invention discloses an underwater granulator capable of effectively filtering scraps, which comprises a circulating water tank, an extrusion molding device, a granulating device, a water particle mixing pipeline, a separation detection device, a centrifugal dehydration device, a primary filtering device and a secondary filtering device, wherein the circulating water tank is communicated with the water tank of the granulating device, the extrusion molding device is arranged at the water tank of the granulating device, the feeding end of the water particle mixing pipeline is communicated with the water tank of the granulating device, the discharging end of the water particle mixing pipeline is communicated with the separation detection device, the separation detection device is communicated with the centrifugal dehydration device, the primary filtering device is communicated with the centrifugal dehydration device, and the secondary filtering device is communicated with the primary filtering device. According to the invention, the primary filtering device is used for filtering the wastewater for the first time, and the filtered wastewater flows into the secondary filtering device for secondary filtering, so that the waste scraps and water in the wastewater are effectively separated completely, the clean water is discharged, and the environmental pollution is avoided.

Description

Underwater granulator capable of effectively filtering waste scraps

Technical Field

The invention relates to the field of grain cutters, in particular to an underwater grain cutter capable of effectively filtering waste chips.

Background

The traditional waste plastic recycling extrusion granulator filters plastic melt through a single-stage or double-stage extruder, extrudes a brace, cuts grains after cooling and solidifying, and the underwater granulator extrusion granulator is a novel machine which is contacted with cooling water and directly cuts grains at the moment of a melt extrusion die surface under the condition that the brace is not used or the brace cannot be used, and the melt granulation has obvious advantages relative to solid granulation. Because plastics are scraped by the blade under the fuse-element state, solidify after the circulating water cooling, the high polymer of different viscosity all can adopt this kind of eager grain form, cut grain can not form any dust under the fuse-element state, and it is regular to cut a grain shape, and the packing, it is all more convenient to transport, according to the discharge capacity and the eager grain speed of extrusion capacity automatic matching regulation die head, change the size of cutting a grain, knife rest when also can the manual work adopts different blade numbers changes eager grain size and shape, cut a grain, the cooling water tank of 4-6mm is saved to the cooling of cooling integration, the area that significantly reduces, granulation technology realizes automaticly, convenient operation, the noise is lower, the section is of high quality, output is bigger, the energy consumption is lower. However, a large amount of waste water can be produced in the production process of the existing underwater granulator, the sweeps and water in the waste water cannot be separated completely, and the direct discharge causes environmental pollution.

Disclosure of Invention

The invention provides an underwater granulator capable of effectively filtering scraps, aiming at overcoming the defects in the prior art and solving the problems in the background art.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a pelleter under water that can effectively filter sweeps, includes circulation water tank, extrusion molding device, cuts grain device, water grain hybrid tube, separation detection device, centrifugal dehydration device, a filter equipment and secondary filter device, circulation water tank with the water tank of cutting grain device is linked together, the extrusion molding device sets up cut grain device's water tank department, water grain hybrid tube's feed end with cut grain device's water tank and be linked together, the discharge end with separation detection device is linked together, separation detection device with centrifugal dehydration device is linked together, a filter equipment with centrifugal dehydration device is linked together, secondary filter device with a filter equipment is linked together.

As a further elaboration of the above technical solution:

in the above technical scheme, separation detection device includes first water tank, shutter, revolving cylinder, sensor, filter screen and first play flitch, first water tank top is provided with first feed inlet, and one side is provided with first discharge gate, and the lower extreme rear is provided with the second discharge gate, second discharge gate below is provided with the first water inlet that runs through, the filter screen slope is installed inside first water tank, and set up the below of first feed inlet, first play flitch is installed on the first water tank and set up first discharge gate department, the shutter lid is established on the first discharge gate, the sensor is installed on one side of first water tank and with revolving cylinder signal connection, revolving cylinder with the shutter transmission is connected, thereby the drive opening and closing of shutter.

In the above technical scheme, centrifugal dehydration device includes second water tank, centrifuge, division board, centrifugal drive motor and second play flitch, the lower extreme of second water tank be provided with second discharge gate matched with second feed inlet, second feed inlet below be provided with first water inlet matched with first delivery port, the rear upper end is provided with the third discharge gate, the division board is installed the inside and the setting of second water tank are in the second feed inlet with between the first delivery port, the second goes out the flitch and installs on the second water tank and set up third discharge gate department, the centrifuge is installed inside the second water tank, centrifugal drive motor installs on the second water tank and with the centrifuge transmission is connected, thereby the drive the centrifuge takes place to rotate.

In the above technical scheme, cut grain device and include pivot, spline housing, sliding sleeve, bearing, drive actuating cylinder, pivot driving motor, transmission case, cutter unit spare and outer sleeve, the spline housing cover is established on pivot driving motor's the output shaft, a pot head of pivot is established on the spline housing, the other end with the cutter unit spare transmission is connected, the bearing housing is established the pivot cover is established serve on the spline housing, the sliding sleeve cover is established on the bearing, the transmission case cover is established in the pivot and set up sliding sleeve the place ahead with sliding sleeve fixed connection, drive actuating cylinder with the transmission case transmission is connected, thereby the drive the axial motion of spline housing, the outer sleeve cover is established the sliding sleeve the transmission case with on the lateral surface of pivot.

In the above technical solution, the primary filtering device includes a third water tank, a fourth water tank, a rotating electrical machine, a screen, a water inlet shaft, a water tank, and a shower, the third water tank is installed above or inside the fourth water tank, the bottom of the third water tank is provided with a second water outlet, the top of the fourth water tank is provided with a third water inlet matching with the second water outlet, the lower end of the side surface is provided with a third water outlet, the water inlet shaft penetrates through the third water tank, one end of the water inlet shaft is communicated with the first water inlet, the water inlet shaft is provided with a first water outlet groove, the water tank and the shower are both installed at the top inside the third water tank, the water outlet of the shower faces the water tank, the screen is sleeved on the outer side surface of the water inlet shaft and is arranged between the water tank and the shower, the screen is provided with second water outlet grooves which are symmetrical to each other, the rotary motor is in transmission connection with the screen, so that the screen is driven to rotate.

In the above technical solution, the secondary filtering device comprises a water inlet pipe, a filter element, a cleaning brush driving motor, a differential pressure sensor and a fifth water tank, wherein the fifth water tank is provided with a fourth water inlet, the bottom of the fifth water tank is provided with a scrap discharge port, a side surface of the fifth water tank is provided with a fourth water outlet, the fourth water outlet is communicated with the circulating water tank, one end of the water inlet pipe is communicated with the third water outlet, the other end of the water inlet pipe is communicated with the fourth water inlet, the differential pressure sensor is arranged on the fifth water tank and is in signal connection with the cleaning brush driving motor, the filter element is arranged on the inner wall of the fifth water tank, the cleaning brush driving motor is arranged on the fifth water tank, the cleaning brush is arranged in the fifth water tank and is in transmission connection with the cleaning brush driving motor, and the cleaning brush is in contact with the filter element, the cleaning brush is driven by the cleaning brush driving motor to rotate, and the differential pressure sensor is arranged on the fifth water tank and is in signal connection with the cleaning brush driving motor.

In the above technical scheme, secondary filter equipment still includes chip removal pipeline and valve, the chip removal pipeline with the sweeps discharge port is linked together, the valve is installed on the chip removal pipeline and with differential pressure sensor signal connection.

In the technical scheme, the device further comprises a scrap collecting box, wherein the scrap collecting box is arranged below the primary filtering device and communicated with a scrap discharging pipeline of the secondary filtering device.

In the technical scheme, the circulating water tank is communicated with the water tank of the granulating device through a first communicating pipeline.

In the technical scheme, the heat exchanger is detachably or fixedly connected with the circulating water tank.

Compared with the prior art, the invention has the beneficial effects that: the waste water treatment device comprises a circulating water tank, an extrusion molding device, a granulating device, a water particle mixing pipeline, a separation detection device, a centrifugal dehydration device, a primary filtering device and a secondary filtering device, wherein the primary filtering device is used for filtering waste water for the first time, and the filtered waste water flows into the secondary filtering device for secondary filtering.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of another embodiment of the present invention;

FIG. 3 is a schematic view of the structure of the pelletizing apparatus of the present invention;

FIG. 4 is a cross-sectional view of the pelletizing apparatus of the present invention;

FIG. 5 is a schematic exploded view of the pelletizing apparatus of the present invention;

FIG. 6 is a schematic view of an assembly structure of the separation detecting device and the centrifugal dehydrating device according to the present invention;

FIG. 7 is an exploded view of the separation detecting unit and the centrifugal dehydrating unit according to the present invention;

FIG. 8 is a schematic view of another perspective exploded structure of the separation detecting device and the centrifugal dehydrating device of the present invention;

FIG. 9 is a schematic view of the construction of a primary filter unit according to the present invention;

FIG. 10 is an exploded view of the primary filter assembly of the present invention;

FIG. 11 is a schematic view of another perspective exploded view of a primary filter assembly according to the present invention;

FIG. 12 is a schematic view showing a primary filter device of the present invention without the third water tank and the fourth water tank;

FIG. 13 is a schematic view showing the construction of a circulation tank, a heat exchanger and a secondary filtering apparatus according to the present invention;

FIG. 14 is a schematic view of another angular configuration of the circulating water tank, heat exchanger and secondary filter apparatus of the present invention;

FIG. 15 is a sectional view of the secondary filter device of the present invention.

In the figure: 1. a circulating water tank; 2. an extrusion molding device; 3. a granulating device; 31. a water tank; 32. a rotating shaft; 33. a spline housing; 34. a sliding sleeve; 35. a bearing; 36. a driving cylinder; 37. the rotating shaft drives the motor; 38. a transmission case; 39. a cutter assembly; 310. an outer sleeve; 4. a water particle mixing pipeline; 5. a separation detection device; 51. a first water tank; 511. a first feed port; 512. a first discharge port; 513. a second discharge port; 514. a first water inlet; 52. a shutter; 53. a rotating cylinder; 54. a sensor; 55. filtering with a screen; 56. a first discharging plate; 6. a centrifugal dehydration device; 61. a second water tank; 611. a second feed port; 612. a first water outlet; 613. a third discharge port; 62. a centrifuge; 63. a partition plate; 64. a centrifugal drive motor; 65. a second discharge plate; 7. a primary filtration device; 71. a third water tank; 711. a second water outlet; 72. a fourth water tank; 721. a third water inlet; 722. a third water outlet; 73. a rotating electric machine; 74. screening a screen; 741. a second water outlet groove; 75. a water inlet shaft; 751. a first water outlet groove; 76. a water tank; 77. a shower pipe; 8. a secondary filtration device; 81. a water inlet pipe; 82. a filter element; 83. a cleaning brush drive motor; 84. a differential pressure sensor; 85. a fifth water tank; 851. a fourth water inlet; 852. a fourth water outlet; 853. a scrap discharge port; 86. a chip removal pipe; 87. a valve; 88. cleaning a brush; 9. a heat exchanger; 10. a first communicating pipe; 11. and a scrap collecting box.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiments described by referring to the drawings are exemplary and intended to be used for explaining the present application and are not to be construed as limiting the present application. In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

As shown in fig. 1, fig. 2, fig. 13, and fig. 14, an underwater pelletizer capable of effectively filtering scraps includes a circulating water tank 1, an extrusion molding device 2, a pelletizing device 3, a water particle mixing pipeline 4, a separation detection device 5, a centrifugal dehydration device 6, a primary filtration device 7, and a secondary filtration device 8, wherein the circulating water tank 1 is communicated with the water tank of the pelletizing device 3, the extrusion molding device 2 is disposed at the water tank of the pelletizing device 3, the feed end of the water particle mixing pipeline 4 is communicated with the water tank 31 of the pelletizing device 3, the discharge end is communicated with the separation detection device 5, the separation detection device 5 is communicated with the centrifugal dehydration device 6, the primary filtration device 7 is communicated with the centrifugal dehydration device 6, and the secondary filtration device 8 is communicated with the primary filtration device 7.

When the device works, the circulating water tank 1 pumps water into the water tank 31 of the granulating device 3, the plastic is extruded by the extrusion molding device 2, the granulating device 3 cuts and shapes the plastic into granules in the water tank, the water and the plastic granules are mixed and conveyed into the separation detection device 5 through the water granule mixing pipeline 4, the separation detection device 5 screens and separates out large plastic granules, qualified plastic granules are conveyed into the centrifugal dehydration device 6, the centrifugal dehydration device 6 separates waste water and the plastic granules, the plastic granules are discharged from the upper end, the waste water is circulated from the lower end to the primary filtering device 7, the primary filtering device 7 filters the waste water for the first time, the waste water after the primary filtration is circulated to the secondary filtering device 8, the secondary filtering device 8 filters the waste water for the second time, the waste chips in the waste water are separated from the water, the dry and clean water is circulated into the circulating water tank 1 for recycling, and the waste chips are collected and processed, avoid polluting the environment and ensure the cyclic utilization of resources.

In this embodiment, as shown in fig. 3 to 5, the pelletizing device 3 includes a rotating shaft 32, a spline housing 33, a sliding sleeve 34, a bearing 35, a driving cylinder 36, a rotating shaft driving motor 37, a transmission case 38, a cutter assembly 39 and an outer sleeve 310, the spline 33 is sleeved on an output shaft of the rotating shaft driving motor 37, a 32 end of the rotating shaft is sleeved on the spline housing 33, the other end of the rotating shaft is in transmission connection with the cutter assembly 39, the bearing 35 is sleeved on the rotating shaft 32, the spline housing 33 is sleeved on one end of the rotating shaft, the sliding sleeve 34 is sleeved on the bearing 35, the transmission case 38 is sleeved on the rotating shaft 32 and is arranged in front of the sliding sleeve 34 and is fixedly connected with the sliding sleeve 34, the driving cylinder 36 is in transmission connection with the transmission case 38, so as to drive the axial movement of the spline housing 33, the outer sleeve 310 is sleeved on the sliding sleeve 34, The gear box 38 and the outer side surface of the rotating shaft 32. Drive the axial motion of actuating cylinder 36 drive spline housing 33, pivot driving motor 37 drive pivot 32 takes place to rotate, and pivot 32 drives cutter unit 39 and takes place to rotate and make cutter unit 39 cut the plastic grain in the water tank, and the setting through spline housing 33 is convenient for the equipment and the dismantlement of pivot, the subsequent maintenance of being convenient for.

In this embodiment, as shown in fig. 6 to 8, the separation detecting device 5 includes a first water tank 51, a shutter 52, a rotary cylinder 53, a sensor 54, a filter 55 and a first discharging plate 56, the top of the first water tank 51 is provided with a first feed inlet 511, one side is provided with a first discharge outlet 512, the rear of the lower end is provided with a second discharge outlet 513, a first water inlet 514 is arranged below the second discharge hole 513, the filter screen 55 is obliquely arranged in the first water tank 51, and is disposed below the first feeding hole 511, the first discharging plate 56 is mounted on the first water tank 51 and disposed at the first discharging hole 512, the shutter 52 covers the first discharge hole 512, the sensor 54 is installed on one side of the first water tank 51, the rotary cylinder 53 is in transmission connection with the shutter 52, so as to drive the shutter 52 to open and close. Water and plastic grain mix and circulate to first water tank 51 inside from first feed inlet 511, filter screen 55 blocks the plastics of big granule, qualified tiny particle plastics circulate downwards and circulate to centrifugal dehydration device 6 through second discharge gate 513, when the plastic grain on filter screen 55 accumulates when a certain amount, sensor 54 responds to the work of drive revolving cylinder 53 behind the quantity of plastic grain, revolving cylinder 53 drives shutter 52 and upwards opens, the ejection of compact of large granule plastic grain along first play flitch 56, the ejection of compact is accomplished the back, revolving cylinder 53 drives shutter 52 and closes, effectively carry out the large granule plastic grain respectively.

In this embodiment, as shown in fig. 6-8, the centrifugal dewatering device 6 includes a second water tank 61, a centrifuge 62, a partition plate 63, a centrifugal driving motor 64, and a second discharging plate 65, a second feeding hole 611 matching with the second discharging hole 513 is disposed at a lower end of the second water tank 61, a first water outlet 612 matching with the first water inlet 514 is disposed below the second feeding hole 611, a third discharging hole 613 is disposed at an upper rear end of the second feeding hole 611, the partition plate 63 is disposed inside the second water tank 61 and disposed between the second feeding hole 611 and the first water outlet 612, the second discharging plate 65 is disposed on the second water tank 61 and disposed at the third discharging hole 613, the centrifuge 62 is disposed inside the second water tank 61, the centrifugal driving motor 64 is disposed on the second water tank 61 and is in transmission connection with the centrifuge 62, thereby driving the centrifuge 62 to rotate. The centrifugal driving motor 64 drives the centrifuge 62 to rotate, the centrifuge 62 drives the plastic particles to move upwards and discharge from the third discharge port 613 and discharge along the second discharge plate 65, and the wastewater flows into the primary filtering device 7 along the first water outlet 612 below the partition plate 63 and then flows through the first water inlet 514 for primary filtering, so that the plastic particles and the wastewater are effectively separated.

In this embodiment, as shown in fig. 9 to 12, the primary filtering device 7 includes a third water tank 71, a fourth water tank 72, a rotating motor 73, a screen 74, a water inlet shaft 75, a water tank 76, and a shower pipe 77. The third water tank 71 is disposed above or inside the fourth water tank 72, and a user can set the third water tank according to actual conditions, which is not limited in this embodiment. The bottom of the third water tank 71 is provided with a second water outlet 711, the top of the fourth water tank 72 is provided with a third water inlet 721 matched with the second water outlet 711, the lower end of the side surface of the fourth water tank is provided with a third water outlet 722, the water inlet shaft 75 penetrates through the third water tank 71, one end of the water inlet is communicated with the first water inlet 514, the water inlet shaft 75 is provided with a first water outlet 751, the water tank 751 and the spray pipe 77 are both arranged at the top of the inside of the third water tank 71, the water outlet of the spray pipe 77 faces the water tank 76, the screen 74 is sleeved on the outer side surface of the water inlet shaft 75 and is arranged between the water tank 76 and the spray pipe 77, the screen 74 is provided with second water outlet 741 symmetrical to each other, and the rotary motor 73 is in transmission connection with the screen 74, so as to drive the screen 74 to rotate. The waste water flows into the water inlet shaft 75 from the first water inlet 514, then flows out of the first water outlet groove 751 of the water inlet shaft 75 to the screen 74, the scraps remain on the screen 74, the filtered water is discharged from the gap of the screen 74 and the second water outlet groove 741, and flows into the fourth water tank 72 from the second water outlet 711 through the third water inlet 721, when the screen 74 rotates to a position between the water tank 76 and the spray pipe 77, the spray pipe 77 flushes the scraps on the water tank 76 into the water tank 76, the scraps are collected, the cleanness of the screen 74 is effectively ensured, the screen 74 is prevented from being blocked by the scraps, the waste water is filtered for the first time, and the scraps and the water are effectively filtered. Further, the shower pipe 77 may be replaced with a high-pressure air jet pipe, and the waste chips on the screen 74 may be blown into the water tank 76 by high-pressure air blowing. The spraying pipe 77 or the high pressure air jetting pipe may be selected according to actual conditions during production, and other devices may be adopted as long as the scraps on the screen 74 can be flushed into the water tank 76, which is not limited in this embodiment.

In this embodiment, as shown in fig. 13-15, the secondary filtering device 8 includes a water inlet pipe 81, a filter element 82, a cleaning brush 88, a cleaning brush driving motor 83, a differential pressure sensor 84, and a fifth water tank 85, the fifth water tank 85 is provided with a fourth water inlet 851, the bottom is provided with a waste discharge port 853, one side surface is provided with a fourth water outlet 852, one end of the water inlet pipe 81 is communicated with the third water outlet 722, the other end is communicated with the fourth water inlet 851, the fourth water outlet 852 is communicated with the circulating water tank 1, the differential pressure sensor 84 is installed on the fifth water tank 85 and is in signal connection with the cleaning brush driving motor 83, the filter element 82 is installed on the inner wall of the fifth water tank 85, the cleaning brush driving motor 83 is installed on the fifth water tank 85, the cleaning brush 88 is installed inside the fifth water tank 85 and is in transmission connection with the cleaning brush driving motor 83, the cleaning brush 88 contacts with the filter element 82, the cleaning brush driving motor 83 drives the cleaning brush 88 to rotate, and the differential pressure sensor 84 is arranged on the fifth water tank 85 and is in signal connection with the cleaning brush driving motor 83. Wherein, secondary filter device 8 still includes chip removal pipeline 86 and valve 87, chip removal pipeline 86 with sweeps discharge port 853 is linked together, valve 87 install on chip removal pipeline 86 and with pressure differential sensor 84 signal connection. Filtered wastewater flows into the water inlet pipeline 81 through the third water outlet 722, then flows into the fifth water tank 85 from the fourth water inlet 851, the filter element 82 filters the wastewater for the second time, after the wastewater flows for a certain time and reaches a certain pressure difference, the pressure difference sensor 84 senses the pressure difference in the fifth water tank 85 and then starts the cleaning brush driving motor 83 and drives the valve 87 to open, the cleaning brush driving motor 83 drives the cleaning brush 88 to rotate to clean waste chips from the filter element and discharge the waste chips from the chip removal pipeline 86, clean water flows into the circulating water tank 1 from the fourth water outlet 853, and water recycling is achieved.

As shown in fig. 9, the device further comprises a waste collecting box 11, wherein the waste collecting box 11 is installed below the primary filtering device 7 and is communicated with a waste discharging pipeline 86 of the secondary filtering device 8. The scrap collecting box 11 is communicated with the washing water pump to be integrated into an independent module, so that the maintenance, upgrading and replacement of subsequent equipment are facilitated.

As shown in fig. 1 and 2, the circulation water tank 1 is communicated with the water tank of the pelletizing device 3 through a first communication pipe 10, and water in the circulation water tank 1 flows into the water tank 31 of the pelletizing device 3 through the first communication pipe 10.

In this embodiment, as shown in fig. 1, fig. 2, fig. 13, and fig. 14, the underwater pelletizer capable of effectively filtering the waste chips further includes a heat exchanger 9, and the heat exchanger 9 is detachably or fixedly connected to the circulation water tank 1. The heat exchanger 9 is detachably connected with the circulating water tank 1, so that the heat exchanger 9 is more convenient to assemble and disassemble, and the subsequent maintenance and replacement of the heat exchanger 9 are facilitated. The heat exchanger 9 is fixedly connected with the circulating water tank 1, so that the heat exchanger 9 is more stably assembled. The user can select the assembling manner of the heat exchanger according to the actual situation, which is not limited in this embodiment.

The waste water treatment device comprises a circulating water tank 1, an extrusion molding device 2, a granulating device 3, a water particle mixing pipeline 4, a separation detection device 5, a centrifugal dehydration device 6, a primary filtering device 7 and a secondary filtering device 8, wherein the primary filtering device 7 is used for filtering waste water for the first time, the filtered waste water flows into the secondary filtering device 8 for filtering for the second time, the automation degree is high, waste scraps and water in the waste water are effectively guaranteed to be separated completely, clean water flows into the circulating water tank 1 for recycling, the environment pollution is avoided, and the recycling of resources is guaranteed.

The technical scope of the present invention is not limited to the above embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims

1. The utility model provides a pelleter under water that can effectively filter sweeps, a serial communication port, including circulation water tank, extrusion molding device, eager grain device, water grain hybrid tube, separation detection device, centrifugal dehydration device, a filter equipment and secondary filter device, circulation water tank with the water tank of eager grain device is linked together, the extrusion molding device sets up the water tank department of eager grain device, water grain hybrid tube's feed end with the water tank of eager grain device is linked together, the discharge end with separation detection device is linked together, separation detection device with centrifugal dehydration device is linked together, a filter equipment with centrifugal dehydration device is linked together, secondary filter device with a filter equipment is linked together.

2. The underwater pelletizer capable of effectively filtering scraps as claimed in claim 1, wherein the separation detection device comprises a first water tank, a shutter, a rotary cylinder, a sensor, a filter screen and a first discharging plate, the first water tank is provided with a first feeding hole at the top, a first discharging hole at one side and a second discharging hole at the rear of the lower end, a first water inlet is arranged below the second discharging hole, the filter screen is obliquely arranged in the first water tank and below the first feeding hole, the first discharging plate is arranged on the first water tank and at the first discharging hole, the shutter cover is arranged on the first discharging hole, the sensor is arranged on one side of the first water tank and in signal connection with the rotary cylinder, the rotary cylinder is in transmission connection with the shutter, thereby driving the opening and closing of the shutter.

3. The underwater pelletizer capable of effectively filtering scraps as claimed in claim 2, wherein the centrifugal dehydration device includes a second water tank, a centrifuge, a partition plate, a centrifugal driving motor and a second discharge plate, the lower end of the second water tank is provided with a second feed inlet matching with the second discharge port, a first water outlet matching with the first water inlet is provided below the second feed inlet, a third discharge port is provided at the upper rear end, the partition plate is installed inside the second water tank and disposed between the second feed inlet and the first water outlet, the second discharge plate is installed on the second water tank and disposed at the third discharge port, the centrifuge is installed inside the second water tank, the centrifugal driving motor is installed on the second water tank and is in transmission connection with the centrifuge, thereby driving the centrifuge to rotate.

4. The underwater pelletizer capable of effectively filtering scraps as set forth in claim 1, the granulating device comprises a rotating shaft, a spline sleeve, a sliding sleeve, a bearing, a driving cylinder, a rotating shaft driving motor, a transmission case, a cutter assembly and an outer sleeve, the spline sleeve is sleeved on an output shaft of the rotating shaft driving motor, one end of the rotating shaft is sleeved on the spline sleeve, the other end of the rotating shaft is in transmission connection with the cutter assembly, the bearing is sleeved on one end of the spline housing sleeved with the rotating shaft, the sliding sleeve is sleeved on the bearing, the transmission case is sleeved on the rotating shaft and arranged in front of the sliding sleeve to be fixedly connected with the sliding sleeve, the driving cylinder is in transmission connection with the transmission case, thereby drive the axial motion of spline housing, outer sleeve cover is established the sliding sleeve, the transmission case with on the lateral surface of pivot.

5. The underwater pelletizer capable of effectively filtering waste scraps as claimed in claim 2, wherein the primary filtering device comprises a third water tank, a fourth water tank, a rotating electrical machine, a screen, a water inlet shaft, a water tank, and a shower pipe, the third water tank is installed above or inside the fourth water tank, the bottom of the third water tank is provided with a second water outlet, the top of the fourth water tank is provided with a third water inlet matched with the second water outlet, the lower end of the side surface is provided with a third water outlet, the water inlet shaft penetrates through the third water tank, one end of the water inlet shaft is communicated with the first water inlet, the water inlet shaft is provided with a first water outlet groove, the water tank and the shower pipe are both installed at the top inside the third water tank, the water outlet of the shower pipe is arranged towards the water tank, the screen is sleeved on the outer side surface of the water inlet shaft and is arranged between the water tank and the shower pipe, the screen cloth is provided with symmetrical second water outlet grooves, and the rotating motor is in transmission connection with the screen cloth so as to drive the screen cloth to rotate.

6. The underwater pelletizer of claim 5, wherein the secondary filtering device comprises a water inlet pipe, a filter element, a cleaning brush driving motor, a differential pressure sensor, and a fifth water tank, the fifth water tank is provided with a fourth water inlet, a bottom is provided with a waste discharge port, a side surface is provided with a fourth water outlet, the fourth water outlet is communicated with the circulating water tank, one end of the water inlet pipe is communicated with the third water outlet, the other end is communicated with the fourth water inlet, the differential pressure sensor is mounted on the fifth water tank and is in signal connection with the cleaning brush driving motor, the filter element is mounted on the inner wall of the fifth water tank, the cleaning brush driving motor is mounted on the fifth water tank, the cleaning brush is disposed inside the fifth water tank and is in transmission connection with the cleaning brush driving motor, the cleaning brush with the filter core contacts, cleaning brush driving motor drive the cleaning brush takes place to rotate, differential pressure sensor install on the fifth water tank and with cleaning brush driving motor signal connection.

7. The underwater pelletizer capable of effectively filtering scraps as claimed in claim 6, wherein said secondary filtering device further comprises a scrap discharge pipe and a valve, said scrap discharge pipe is communicated with said scrap discharge port, said valve is installed on said scrap discharge pipe and is connected with said differential pressure sensor by signal.

8. The underwater pelletizer capable of effectively filtering scraps as claimed in claim 7, further comprising a scrap collecting box installed below the primary filtering device and communicating with the scrap discharging pipeline of the secondary filtering device.

9. The underwater pelletizer capable of effectively filtering scraps as claimed in claim 1, wherein the circulating water tank is communicated with the water tank of the pelletizing device through a first communication pipeline.

10. The underwater pelletizer capable of effectively filtering scraps as claimed in claim 1, further comprising a heat exchanger, wherein the heat exchanger is detachably or fixedly connected with the circulating water tank.