Distributed melt filter

Abstract

The present application relates to melt filter technical field, specifically to the collection and distribution type melt filter, including double channel filter column device, cleaning device located above the filter column and adjusting device located below the filter column. When the filter works normally, the melt enters into the filter column through the feeding pipe, is filtered through the filter screen in the filter column, and then is discharged through the discharge pipe. At this time, the piston column in the adjusting device does not block the discharge pipe, and does not affect the flow of the material. When the filter is in the backwashing mode, the piston column reciprocates between the discharge pipe and the melt channel at this time, and the corresponding check valve is closed, so that the backwashing of the filter screen can be realized, and the impurity-rich material in the backwashing is scraped out by the scraper roller. When in the mode of removing the primary filtrate, the annular groove around the piston column is communicated with the primary filtrate outlet at this time, and the piston column blocks the discharge pipe, so that the generated primary filtrate is discharged through the primary filtrate outlet, thereby effectively ensuring the quality of the product.

Description

Technical Field

[0001] This invention relates to the field of melt filter technology, and more specifically to a distributed melt filter. Background Technology

[0002] Melt filters are widely used for filtering melts of plastic materials. When the melt flows through the filter screen, foreign particles and impurities in the melt are filtered out, thus obtaining pure materials, which plays a crucial role in ensuring the quality of subsequent products.

[0003] As production progresses, impurities accumulate on the filter screen, increasing system pressure. This impacts production efficiency and poses safety hazards. Therefore, the filter screen needs to be cleaned and replaced periodically based on actual production needs. To ensure uninterrupted production during filter screen replacement, most existing systems employ dual-channel filtration, allowing the other channel to operate stably while the filter screen is being replaced in one channel, thus ensuring stable production. Consequently, in actual production, frequent filter screen replacement and cleaning are often required, consuming significant time and increasing workload while hindering production efficiency.

[0004] Therefore, a melt filter device that can clean the filter screen online without disassembling it during production operations, thereby effectively reducing the frequency of filter screen replacement and ensuring production efficiency, is the existing technical problem that needs to be solved. Summary of the Invention

[0005] The purpose of this invention is to provide a distributed melt filter to solve the problem that existing filters require frequent screen replacements during use, which increases workload and hinders production efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a distributed melt filter, comprising a housing, within which a dual-channel filter column device is installed. A check valve is installed on the feed pipe of the filter column device. Melt material enters the filter column device through the feed pipe. A filter screen is fixedly installed in the filter column device. The melt material is filtered through the filter screen and then discharged from the filter column device. The filtered melt material is discharged through the discharge pipe. A cleaning device is provided above the filter screen, and an adjusting device is provided below the filter screen. The adjusting device cooperates with the discharge pipe. When the adjusting device does not obstruct the discharge pipe, the filter is in normal working mode. When the adjusting device alternately obstructs and does not obstruct the discharge pipe, the check valve closes, and the filter is in backwashing mode. In backwashing mode, the generated material rich in impurities is cleaned by the cleaning device.

[0007] Furthermore, the filter column device includes a first filter column and a second filter column, a feed pipe including a first feed pipe and a second feed pipe, and a check valve including a first check valve and a second check valve; the first feed pipe is connected to the first filter column, the second feed pipe is connected to the second filter column, the first check valve is disposed on the first feed pipe, and the second check valve is disposed on the second feed pipe; the first feed pipe and the second feed pipe are connected to the feed inlet; the first filter column is connected to a first hydraulic device, and the second filter column is connected to a second hydraulic device; the first filter column and the second filter column are sealed to the housing.

[0008] Furthermore, both the first and second filter columns are provided with a support mesh plate, and a pressure plate groove is provided at the support mesh plate. The filter screen is placed in the pressure plate groove, and a pressure plate is placed in the pressure plate groove. When the first and second filter columns are located in the housing, the pressure plate presses and fixes the periphery of the filter screen.

[0009] Furthermore, the cleaning device includes a first drain outlet and a second drain outlet. The first drain outlet is located above the filter screen of the first filter column, and the second drain outlet is located above the filter screen of the second filter column. A first scraper roller is provided at the first drain outlet, and a second scraper roller is provided at the second drain outlet. The first scraper roller is connected to a first motor, and the second scraper roller is connected to a second motor. Drain doors are installed at both the first and second drain outlets. The drain doors are sealed to the housing. One side of the drain door is hinged to the housing, and the other side of the drain door is connected to the housing via a handwheel hinge.

[0010] Furthermore, both the first scraper roller and the second scraper roller are provided with scraper grooves. There are multiple scraper grooves, which are rotationally symmetrical with respect to the center of their respective scraper rollers. The length of the scraper groove is consistent with the diameter of their respective sewage outlets.

[0011] Furthermore, a melt channel is provided below the supporting mesh plate, the melt channel being wider at both ends and narrower in the middle; the melt channel of the first filter column is connected to the first discharge pipe, and the melt channel of the second filter column is connected to the second discharge pipe; the first discharge pipe and the second discharge pipe are connected to the discharge port; an adjusting device is arranged below the melt channel, the adjusting device including a first piston column and a second piston column, the first piston column being connected to a third hydraulic device, and the second piston column being connected to a fourth hydraulic device; the first piston column cooperates with the first discharge pipe, and the second piston column cooperates with the second discharge pipe.

[0012] Furthermore, when the filter is in working mode, the tops of the first piston column and the second piston column are located below the first discharge pipe and the second discharge pipe, respectively, and remain stationary. When the filter is in backwashing mode, one filter column operates normally while backwashing the other filter column. The drain valve corresponding to the backwashed filter column opens, the corresponding scraper roller moves, the corresponding check valve closes, and the corresponding piston column reciprocates between the corresponding discharge pipe and the corresponding melt channel.

[0013] Furthermore, when the filter is in backwash mode, the filtrate of the normally operating filter enters the corresponding melt channel through the discharge pipe corresponding to the backwash filter column. Under the action of the corresponding piston column, the melt in the melt channel surges upward in a pulse, thereby backwashing the filter screen.

[0014] Furthermore, both the first and second piston columns are provided with circumferential grooves around their peripheries, and the upper part of the circumferential grooves is connected to multiple circumferential grooves; the filter also includes a mode for removing primary filtrate, with a first primary filtrate outlet provided below the first discharge pipe and a second primary filtrate outlet provided below the second discharge pipe; the circumferential grooves are not connected to the corresponding discharge pipes and the corresponding primary filtrate outlets; when the filter is in the mode for removing primary filtrate, the upper part of the corresponding piston column is higher than the position of the corresponding discharge pipe, and the corresponding circumferential groove is connected to the corresponding primary filtrate outlet.

[0015] Furthermore, when the filter is configured to remove the initial filtrate, the melt material is filtered through the filter screen, then passes through the melt channel, the circumferential groove, and the annular groove, and finally discharged from the corresponding initial filtrate outlet.

[0016] The beneficial effects of this invention are:

[0017] 1. It can realize online backwashing of the filter screen during the filtration of molten materials without opening the filter column device, making it more convenient and faster to use;

[0018] 2. It can effectively reduce the frequency of opening the filter column device to clean the filter screen, thereby reducing the workload and effectively ensuring production efficiency;

[0019] 3. By removing the initial filtrate, the initial filtrate from the initial filtration stage can be removed, thereby effectively ensuring the production quality of the product. Attached Figure Description

[0020] Figure 1 This is a top view of the overall structure of the present invention;

[0021] Figure 2 This is a bottom view of the overall structure of the invention;

[0022] Figure 3 This is the present invention. Figure 1 Schematic diagram of the cross-sectional structure at point AA;

[0023] Figure 4 This is a schematic diagram of the melt flow state during normal operation of the present invention;

[0024] Figure 5 This is a schematic diagram of the melt flow state during backflushing according to the present invention (first state);

[0025] Figure 6 This is a schematic diagram of the melt flow state during backflushing according to the present invention (second state);

[0026] Figure 7 This is a schematic diagram of the melt flow state when removing the initial filtrate after backwashing according to the present invention;

[0027] Figure 8 This is a top view schematic diagram of the filter column structure of the present invention;

[0028] Figure 9 This is a cross-sectional schematic diagram (exploded view) of the filter column structure of the present invention;

[0029] Figure 10 This is a top view schematic diagram of the pressure plate of the present invention;

[0030] Figure 11 This is a front view schematic diagram of the piston column structure of the present invention;

[0031] Figure 12 This is a top view schematic diagram of the piston column structure of the present invention;

[0032] Figure 13 This is a schematic diagram of the cross-sectional structure of the scraper roller of the present invention.

[0033] The names corresponding to each mark in the diagram:

[0034] 1. Shell; 11. Inlet; 111. First inlet pipe; 112. First check valve; 113. Second inlet pipe; 114. Second check valve; 12. Outlet; 121. First outlet pipe; 122. Second outlet pipe; 13. First primary filtrate outlet; 14. Second primary filtrate outlet; 2. Filter column assembly; 21. First hydraulic device; 22. First filter column; 23. Second hydraulic device; 24. Second filter column; 25. Support mesh plate; 26. Pressure plate groove; 27. Filter screen; 28. Pressure plate; 29. Melt channel; 3. Cleaning device; 31. First motor; 32. First scraper roller; 33. First drain outlet; 34. Second motor; 35. Second scraper roller; 36. Second drain outlet; 37. Drain gate; 38. Handwheel hinge; 39. Scraper groove; 4. Adjustment device; 41. Third hydraulic device; 42. First piston column; 43. Fourth hydraulic device; 44. Second piston column; 45. Circumferential groove; 46. Circumferential groove; 5. Heating chamber; 51. Circulating medium inlet; 52. Circulating medium outlet. Detailed Implementation

[0035] The technical solutions of the present invention will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0036] Embodiments of the present invention:

[0037] like Figure 1-2 As shown, the present invention includes a housing 1, and a filter column device 2 is provided in the housing 1. The filter column device 2 includes a first filter column 22 and a second filter column 24. The first filter column 22 is connected to a first hydraulic device 21, and the second filter column 24 is connected to a second hydraulic device 23. A cleaning device 3 is provided above the housing 1, corresponding to the filter column device 2. An adjusting device 4 is provided below the housing 1, also corresponding to the filter column device 2.

[0038] like Figure 1-3 As shown in Figure 13, a feed inlet 11 is provided on the housing 1. The feed inlet 11 is connected to a first feed pipe 111 and a second feed pipe 113. A first check valve 112 is provided on the first feed pipe 111, and a second check valve 114 is provided on the second feed pipe 113. The first feed pipe 111 is connected to a first filter column 22, and the first filter column 22 is connected to a first discharge pipe 121. The second feed pipe 113 is connected to a second filter column 24, and the second filter column 24 is connected to a second discharge pipe 122. The first discharge pipe 121 and the second discharge pipe 122 are connected to the discharge port 12.

[0039] The cleaning device 3 is arranged above the filter column device 2. A first drain outlet 33 is provided above the first filter column 22, and a second drain outlet 36 is provided above the second filter column 24. A first scraper roller 32 is installed at the first drain outlet 33, and a second scraper roller 35 is installed at the second drain outlet 36. The first scraper roller 32 is connected to the first motor 31, and the second scraper roller 35 is connected to the second motor 34. Drain gates 37 are hinged at both the first drain outlet 33 and the second drain outlet 36, and the drain gates 37 are connected to the housing 1 through a handwheel hinge 38. Scraper grooves 39 are provided on both the first scraper roller 32 and the second scraper roller 35. There are two scraper grooves 39, which are symmetrically rotated 180° with respect to the center of the first scraper roller 32 and the second scraper roller 35, respectively. The length of the scraper grooves 39 is consistent with the diameter of the first drain outlet 33 and the second drain outlet 36, respectively.

[0040] like Figure 3 , 8 As shown in Figure -10, a support mesh plate 25 is provided on both the first filter column 22 and the second filter column 24. A pressure plate groove 26 is provided on the support mesh plate 25. A filter screen 27 is placed on the support mesh plate 25, and a pressure plate 28 is placed through the pressure plate groove 26. The filter screen 27 is located below the first drain port 33 and the second drain port 36, respectively. Below the support mesh plate 25 is a melt channel 29, which is wide at both ends and narrow in the middle. The melt channel 29 cooperates with the adjustment device 4 below it.

[0041] like Figure 3 As shown in Figures 11-12, the adjusting device 4 cooperates with the lower part of the filter column device 2. A first piston column 42 is provided below the first filter column 22 and is connected to the third hydraulic device 41. A second piston column 44 is provided below the second filter column 24 and is connected to the fourth hydraulic device 43. Both the first piston column 42 and the second piston column 44 are provided with circumferential grooves 45, which are connected to multiple circumferential grooves 46. By moving the first piston column 42 and the second piston column 44, the circumferential grooves 45 can respectively connect with the first discharge pipe 12. The first discharge pipe 121 is connected to the second discharge pipe 122; at the same time, the first primary filtrate outlet 13 and the second primary filtrate outlet 14 are provided in the housing 1. Through the movement of the first piston column 42 and the second piston column 44, the annular groove 45 can also be connected to the first primary filtrate outlet 13 and the second primary filtrate outlet 14 respectively; the first discharge pipe 121 is offset from the first primary filtrate outlet 13, and the height of the first discharge pipe 121 is higher than the height of the first primary filtrate outlet 13; the second discharge pipe 122 is offset from the second primary filtrate outlet 14, and the height of the second discharge pipe 122 is higher than the height of the second primary filtrate outlet 14.

[0042] like Figure 3 As shown, a heating chamber 5 is also provided in the housing 1. The heating chamber 5 runs through the entire housing 1. A circulating medium inlet 51 is provided on one side of the heating chamber 5, and a circulating medium outlet 52 is provided on the other side of the heating chamber 5.

[0043] The principle of this invention is as follows:

[0044] The melt filter of the present invention can achieve dispersed filtration of melt and collect the dispersed filtered melt. During the process, the dual-channel filtration mode allows the equipment to be operated without stopping when cleaning and replacing the filter screen 27, thereby ensuring the continuity and stability of production and helping to ensure production efficiency.

[0045] In addition, the melt filter of the present invention can greatly reduce the cleaning frequency of the filter screen 27, which also plays a positive role in reducing the workload and improving production efficiency.

[0046] like Figure 4 The diagram shows the melt flow state during normal production of the melt filter of the present invention. During normal production, the melt enters the housing 1 through the feed inlet 11 (connected to the extruder). Inside the housing 1, it is diverted by the first feed pipe 111 and the second feed pipe 113. At this time, the first check valve 112 and the second check valve 114 are in a connected state, not affecting the melt flow. Through the first feed pipe 111 and the second feed pipe 112, the melt enters the first filter column 22 and the second filter column 23, respectively. At filter column 24, the filtrate flows out from the bottom of filter column device 2 after being filtered by the first filter column 22 and the second filter column 22. At this time, the first piston column 42 and the second piston column 44 block the first primary filtrate outlet 13 and the second primary filtrate outlet 14, but do not block the first discharge pipe 121 and the second discharge pipe 122. Thus, the filtered melt flows through the first discharge pipe 121 and the second discharge pipe 122, and then is discharged from the discharge port 12 (the discharge port 12 is connected to the wire drawing and granulation equipment) for subsequent processing.

[0047] like Figure 5-6As shown, after a period of use, the filter screen 27 will become clogged, at which point the filtration pressure in the system will rise, thus reminding people to clean and replace the filter screen 27. For measuring system pressure, existing technologies such as pressure sensors are relatively mature, and this invention does not involve improvements in this area. Furthermore, this is readily understood by those skilled in the art and will not be elaborated further. Taking the cleaning of the first filter column 22 as an example, when cleaning the first filter column 22, first open the drain door 37 above the first filter column 22 and control the first motor 31 to start rotating slowly. At this time, the first filter column 22... The molten material in the scraper groove 39 will be scraped off. When the scraper groove 39 rotates to the drain gate 37, the material in the scraper groove 39 is scraped off manually with a shovel or the like. At the same time, the first piston column 42 is controlled to move upward, so the first piston column 42 will block the first discharge port 12 and push the molten material in the first filter column 22 upward. At this time, due to the pressure in the first feed pipe 111, the first check valve 112 is activated, so the first feed pipe 111 can be cut off. The upward flowing molten material backwashes the impurities on the surface of the filter screen 27. The backwashed impurities enter the scraper groove 39 and are then carried out by the scraper roller.

[0048] In practical use, it is difficult to clean the impurities on the surface of the filter screen 27 in one rinse. In this case, multiple rinses are required. The first piston column 42 is controlled to return to the initial position, that is, the circumferential groove 45 is connected to the first discharge port 12. At this time, due to the reduction of material in the first filter column 22, the pressure in the first filter column 22 will decrease. Then, the melt in the second discharge pipe 122 will enter the first filter column 22 through the first discharge pipe 121. It should be noted that due to the high viscosity of the melt, the first check valve 112 will not open instantly, but will open slowly. During this process, the material in the second discharge pipe 122 has already entered the first discharge pipe 121. At this time, the first piston column 42 moves upward again, thus realizing the second rinse of the filter screen 27. The process is repeated 2 to 3 times to complete the cleaning process of the entire filter screen 27.

[0049] During the above process, since the melt channel 29 is narrow in the middle and wide at both ends, a certain impact force will be generated during the upward flow of the melt, which helps to remove impurities from the surface of the filter screen 27. In addition, due to the setting of the pressure plate 28 in the pressure plate groove 26, the filter screen 27 will not separate from the support screen plate 25 under the impact of backwashing, thus not affecting the stability of use after cleaning.

[0050] It should also be noted that during the up-and-down movement of the first filter column 22, the circumferential groove 45 will connect with the first primary filtrate outlet 13 for a short period of time (i.e., as shown in the image). Figure 7 The state of the first filter column 22 (due to the short connection time) has almost no impact on the flow of the melt.

[0051] like Figure 7 As shown, after rinsing, the filter screen 27 needs to be reused. During the process, since there are fewer impurities on the surface of the filter screen 27, the purity of the initial filtrate will be affected. At this time, the initial filtrate needs to be removed. During the process, the first piston column 42 moves down. During the downward movement, the circumferential groove 45 is connected to the first initial filtrate outlet 13, so the initial filtrate produced by filtration can be discharged. After the initial filtrate is discharged, the first piston column 42 continues to move down, thus returning to the initial state and continuing to filter the melt material. The filtered melt is discharged through the first discharge pipe 121.

[0052] The above process is the rinsing process for the first filter column 22. The rinsing process for the second filter column 24 is similar to that for the first filter column 22, and will not be described in detail. During the rinsing process of the first filter column 22 or the second filter column 24, the other filter column remains in operation to ensure the continuity of production. In addition, if the rinsing cannot clear the filter screen 27 after a long period of use, the filter screen 27 needs to be replaced. During this process, the first hydraulic device 21 controls the first filter column 22 to move outside the housing 1. At this time, the filter screen 27 is exposed outside the housing 1. The pressure plate 28 is removed and the filter screen 27 is replaced. This process is a common way to replace the filter screen 27 in existing production processes, and will not be described in detail here. In addition, in order to ensure the operation of the device, a heating chamber 5 is provided in the housing 1. The purpose of the heating chamber 5 is to ensure that the melt does not solidify during the filtration process. Existing melt filters are all equipped with a heating chamber 5. This invention does not make any improvements here, and it is not difficult for those skilled in the art to understand, so it will not be described in detail here.

[0053] This invention is not limited to the preferred embodiments described above. Anyone can derive other forms of products under the guidance of this invention. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this invention.

Claims

1. A distributed melt filter, comprising a housing (1), wherein a dual-channel filter column device (2) is provided in the housing (1), characterized in that: A check valve is installed on the feed pipe of the filter column device (2). The molten material enters the filter column device (2) through the feed pipe. A filter screen (27) is fixedly installed in the filter column device (2). The molten material is filtered through the filter screen (27) and then discharged from the filter column device (2). The filtered molten material is discharged through the discharge pipe. A cleaning device (3) is set above the filter screen (27), and an adjusting device (4) is set below the filter screen (27). The adjusting device (4) cooperates with the discharge pipe. When the adjusting device (4) does not block the discharge pipe, the filter is in normal working mode. When the adjusting device (4) alternately blocks and does not block the discharge pipe, the check valve is closed, and the filter is in backwash mode. In the backwash mode, the material rich in impurities is cleaned by the cleaning device (3). The filter column device (2) includes a first filter column (22) and a second filter column (24), a feed pipe including a first feed pipe (111) and a second feed pipe (113), and a check valve including a first check valve (112) and a second check valve (114); the first feed pipe (111) is connected to the first filter column (22), the second feed pipe (113) is connected to the second filter column (24), the first check valve (112) is installed on the first feed pipe (111), and the second check valve (114) is installed on the second feed pipe (113); the first feed pipe (111) and the second feed pipe (113) are connected to the feed inlet (11); the first filter column (22) is connected to the first hydraulic device (21), and the second filter column (24) is connected to the second hydraulic device (23); the first filter column (22) and the second filter column (24) are sealed to the housing (1); Both the first filter column (22) and the second filter column (24) are provided with a support mesh plate (25). A pressure plate groove (26) is provided at the support mesh plate (25). The filter screen (27) is placed in the pressure plate groove (26). A pressure plate (28) is placed in the pressure plate groove (26). When the first filter column (22) and the second filter column (24) are located in the housing (1), the pressure plate (28) presses and fixes the periphery of the filter screen (27). The cleaning device (3) includes a first drain outlet (33) and a second drain outlet (36). The first drain outlet (33) is located above the filter screen (27) of the first filter column (22), and the second drain outlet (36) is located above the filter screen (27) of the second filter column (24). A first scraper roller (32) is provided at the first drain outlet (33), and a second scraper roller (35) is provided at the second drain outlet (36). A melt channel (29) is provided below the support mesh plate (25), and the melt channel (29) is wide at both ends and narrow in the middle; the melt channel (29) of the first filter column (22) is connected to the first discharge pipe (121), and the melt channel (29) of the second filter column (24) is connected to the second discharge pipe (122); the first discharge pipe (121) and the second discharge pipe (122) are connected to the discharge port (12); the adjusting device (4) is arranged below the melt channel (29), and the adjusting device (4) includes a first piston column (42) and a second piston column (44), the first piston column (42) is connected to the third hydraulic device (41), and the second piston column (44) is connected to the fourth hydraulic device (43); the first piston column (42) cooperates with the first discharge pipe (121), and the second piston column (44) cooperates with the second discharge pipe (122); The first piston rod (42) and the second piston rod (44) are both provided with circumferential grooves (45) around their periphery, and the upper part of the circumferential grooves (45) is connected to multiple circumferential grooves (46).

2. The distributed melt filter according to claim 1, characterized in that: The first scraper roller (32) is connected to the first motor (31), and the second scraper roller (35) is connected to the second motor (34). Drain gates (37) are installed at the first drain outlet (33) and the second drain outlet (36). The drain gates (37) are sealed to the housing (1). One side of the drain gates (37) is hinged to the housing (1), and the other side of the drain gates (37) is connected to the housing (1) through a handwheel hinge (38).

3. The distributed melt filter according to claim 2, characterized in that: Both the first scraper roller (32) and the second scraper roller (35) are provided with scraper grooves (39). Multiple scraper grooves (39) are provided and are rotationally symmetrical with respect to the center of their respective scraper rollers. The length of the scraper grooves (39) is consistent with the diameter of their respective sewage outlets.

4. The distributed melt filter according to claim 2, characterized in that: When the filter is in working mode, the tops of the first piston column (42) and the second piston column (44) are located below the first discharge pipe (121) and the second discharge pipe (122) respectively and remain stationary. When the filter is in backwashing mode, one filter column works normally and backwashes the other filter column. The drain door (37) corresponding to the backwashed filter column is opened, the corresponding scraper roller moves, the corresponding check valve is closed, and the corresponding piston column reciprocates between the corresponding discharge pipe and the corresponding melt channel (29).

5. The distributed melt filter according to claim 4, characterized in that: When the filter is in backwash mode, the filtrate of the normally operating filter enters the corresponding melt channel (29) through the discharge pipe corresponding to the backwash filter column. Under the action of the corresponding piston column, the melt in the melt channel (29) surges upward in a pulse, thereby backwashing the filter screen.

6. The distributed melt filter according to claim 4, characterized in that: The filter also includes a mode for removing primary filtrate, with a first primary filtrate outlet (13) provided below the first discharge pipe (121) and a second primary filtrate outlet (14) provided below the second discharge pipe (122); the circumferential groove (46) is not connected to the corresponding discharge pipe and the corresponding primary filtrate outlet; when the filter is in the mode for removing primary filtrate, the position of the corresponding piston column is higher than that of the corresponding discharge pipe, and the corresponding circumferential groove (45) is connected to the corresponding primary filtrate outlet.

7. The distributed melt filter according to claim 6, characterized in that: When the filter is in the mode of removing the initial filtrate, the melt material is filtered through the filter screen, then passes through the melt channel (29), the circumferential groove (46) and the annular groove (45), and finally discharged from the corresponding initial filtrate outlet.

Images