A raw material filtering device for furfural production

Abstract

The present invention discloses a raw material filtering device for furfural production, and relates to the field of filtering technology. The raw material filtering device for furfural production includes a screw extruder, and a filtering mechanism is provided below one end of the screw extruder; the filtering mechanism includes a fixed shell, and a filter assembly is rotatably connected inside the fixed shell; the lower end of the filter assembly is rotatably connected inside the bottom shell, and the bottom shell is threadedly connected to the bottom of the fixed shell, and a fixed seat is fixed at the upper end of the bottom shell, and a motor is installed on the fixed seat, and a gear is matched and installed on the output shaft of the motor; the gear is used to drive the filter assembly. In the present invention, when impurities gather between the arc filter and the slag retaining shell, the motor drives the gear ring to rotate through the gear; after the filter shell rotates 180 degrees, the slag retaining shell where impurities are accumulated is placed on the outside, and the staff removes the slag retaining shell to facilitate the cleaning of impurities, and at this time, the inside passes through another arc filter and the slag retaining shell for filtering.

Description

Technical Field

[0001] The invention specifically relates to the field of filtering technology, in particular to a raw material filtering device for furfural production. Background Art

[0002] Furfural is produced by hydrolysis of pentosans under the action of acid to form pentoses, which are then dehydrated and cyclized. Furfural is usually produced using agricultural and forestry wastes rich in polypentoses as raw materials, such as corn cobs, bagasse, rice husks, etc.

[0003] Chinese patent announcement number CN 216457322 U discloses a high-efficiency furfural continuous refining device, including a base and a filtering device, the filtering device is arranged at the upper end of the left side of the refining box, the filtering device includes a guide frame, a sliding table, a filter frame, a baffle, a pulling assembly and a pressing assembly, the right side of the guide frame is rotatably connected to the refining box, and the inside of the guide frame is slidably connected to the sliding table, and the upper end of the sliding table is plugged with the filter frame.

[0004] The furfural continuous refining device in the above patent can quickly filter impurities under the action of the filter frame, and with the cooperation of the pulling assembly relatively arranged at the lower left end of the guide frame, the guide frame can be tilted to enable the sliding table to drive the filter frame to be moved out for cleaning.

[0005] Although the above patent can realize the cleaning of the filter frame, the machine needs to be shut down during the cleaning, and it is impossible to clean the residue while filtering, which reduces the working efficiency of the equipment. Summary of the invention

[0006] The purpose of the present invention is to provide a raw material filtering device for furfural production, which can realize continuous and uninterrupted filtering work of the equipment while cleaning impurities, and has an automatic switching function so that the staff can quickly clean the material residue, so as to solve the technical problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A raw material filtering device for furfural production comprises a screw extruder, and a filtering mechanism is arranged below one end of the screw extruder; the filtering mechanism comprises a fixed shell, and a filter assembly is rotatably connected inside the fixed shell; the lower end of the filter assembly is rotatably connected inside a bottom shell, and the bottom shell is threadedly connected to the bottom of the fixed shell, a fixing seat is fixed at the upper end of the bottom shell, and a motor is installed on the fixing seat, and a gear is matched and installed on the output shaft of the motor; the gear is used to drive the filter assembly;

[0009] The filter assembly comprises a filter housing, which is provided with openings on both sides, and an arc filter is fixed on the inner side of each opening; a cavity for liquid circulation is formed between the two arc filters; a plurality of filter holes are formed at the bottom of the filter housing, and the filter holes are arranged along the shape of the cavity between the two arc filters;

[0010] A top plate is fixed on the top of the filter housing, and a through hole is opened above the arc filter screen; a gear ring meshing with a gear is installed on the outer side of the upper end of the filter housing; the filter housing rotates in contact with the inner wall of the fixed housing.

[0011] As a further technical solution of the present invention, a slag retaining shell is clamped on the outer side of the arc filter screen. The slag retaining shell is arranged in an arc shape, and the arc center point of the slag retaining shell is located on the central axis of the shell.

[0012] As a further technical solution of the present invention, the fixed housing comprises a shell, the top of which is connected to a connecting pipe fixed to the screw extruder, and a connecting shell is fixed to the bottom of the connecting pipe, and the connecting shell is attached to the top of the top plate;

[0013] A through groove is provided on one side of the upper end of the fixed shell for the gear and the gear ring to pass through and mesh with each other.

[0014] As a further technical solution of the present invention, a liquid infusion tube is fixed to the bottom of the bottom shell, the liquid infusion tube is connected to the delivery pump, and the liquid outlet of the delivery pump is connected to a diverter through a pipeline; a plurality of diverter tubes are connected to one side of the diverter, and a juice collection tank is installed on each diverter; a plurality of juice collection tanks are fixed on a tank rack; and the tank rack is fixed to the frame.

[0015] As a further technical solution of the present invention, a pneumatic separation and impurity removal mechanism is provided at the upper end of the feed port of the screw extruder, and a slag collection box is provided at the discharge end; a mesh chain elevator is provided above the feed port of the pneumatic separation and impurity removal mechanism, and a drying mechanism is provided above the mesh chain elevator.

[0016] As a further technical solution of the present invention, the wind separation and impurity removal mechanism comprises a wind separation machine housing fixed to the frame body; the wind separation machine housing has a feed inlet at the upper end, and an inclined plate is obliquely provided below the feed inlet; a negative pressure filter is obliquely provided at the lower end of the inclined plate, and the other end of the negative pressure filter is clamped and fixed to a material guide plate; the material guide plate is located above the feed inlet;

[0017] As a further technical solution of the present invention, two suction heads are provided on the bottom side of the negative pressure filter; the suction head is connected to the negative pressure fan through a negative pressure suction pipe; the negative pressure fan is installed on one side of the dust removal box, wherein the dust removal box is fixed on the top of the air separator casing.

[0018] As a further technical solution of the present invention, the drying mechanism comprises a drying shell, a plurality of heating plates are arranged inside the drying shell, and two fans for blowing hot air toward the chain hoist are arranged on the top of the drying shell.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In the present invention, when the material is used, after being squeezed by the screw extruder, the juice passes through the fixed shell and enters between the arc filter and the slag retaining shell, and the impurities are intercepted by the arc filter and remain in place; the filtered juice enters the cavity between the two arc filters, and then flows into the bottom shell through the filter holes opened at the bottom of the filter shell; thereby, the filtration of the juice is achieved, the presence of impurities can be reduced, and the influence of impurities on subsequent process treatment can be avoided; in the present invention, when impurities gather between the arc filter and the slag retaining shell, the motor drives the gear ring to rotate through the gear; after the filter shell rotates 180 degrees, the slag retaining shell where the impurities are accumulated is placed on the outside, and the working The staff removes the slag retaining shell to facilitate the cleaning of impurities, and at this time, the inner side passes through another arc-shaped filter screen and the slag retaining shell for filtering; this scheme can realize the simultaneous filtering of juice and cleaning of impurities, thereby ensuring that the equipment works without stopping, and greatly improving the working efficiency of the equipment. According to the present invention, the outer side of the arc-shaped filter screen is clamped with a slag retaining shell, and the slag retaining shell is arranged in an arc shape, and the arc center point of the slag retaining shell is located on the central axis of the shell; it can ensure that the slag retaining shell and the filter shell can rotate in accordance with the inner wall of the fixed shell, firstly, it can prevent the juice from flowing to the outside, and secondly, it can ensure that the impurities can be brought out during rotation for cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0022] Figure 2 The present invention Figure 1 The left side structural diagram of .

[0023] Figure 3 The present invention Figure 1 Schematic diagram of the bottom structure.

[0024] Figure 4 The present invention Figure 1 main view.

[0025] Figure 5 The present invention Figure 1 Left view of .

[0026] Figure 6 The present invention Figure 5 AA section view.

[0027] Figure 7It is a schematic diagram of the split structure of the filtering mechanism in the present invention.

[0028] Figure 8 The present invention Figure 7 Schematic diagram of the bottom structure.

[0029] Fig. 9 It is a structural schematic diagram of the filter assembly in the present invention.

[0030] Fig.10 The present invention Fig. 9 Schematic diagram of the bottom structure.

[0031] Fig.11 It is a cross-sectional schematic diagram of the filter assembly in the present invention.

[0032] Fig.12 The present invention Figure 1 An enlarged schematic diagram of point B.

[0033] Fig.13 The present invention Figure 4 Enlarged schematic diagram of point C.

[0034] Fig.14 The present invention Figure 6 An enlarged schematic diagram of point D.

[0035] Fig.15 The present invention Figure 8 Enlarged schematic diagram of point E.

[0036] In the figure: 1-screw extruder, 2-filtering mechanism, 3-juice collecting tank, 4-tank frame, 5-frame, 6-air separation and impurity removal mechanism, 7-drying mechanism, 8-net chain elevator, 9-slag collecting box;

[0037] 21-fixed housing, 22-slag retaining housing, 23-filter assembly, 24-gear, 25-motor, 26-fixed seat, 27-bottom housing, 28-infusion pipe, 29-delivery pump, 210-diverter;

[0038] 211-housing, 212-connecting pipe, 213-connecting shell;

[0039] 231 - filter housing, 232 - arc filter screen, 233 - top plate, 234 - gear ring;

[0040] 61-air separator housing, 62-feeding port, 63-inclined plate, 64-negative pressure filter screen, 65-guide plate, 66-feeding port, 67-filter head, 68-negative pressure suction pipe, 69-negative pressure fan, 610-dust removal box;

[0041] 71-drying shell, 72-blower, 73-heating plate. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] See also Figures 1 to 15 In an embodiment of the present invention, a raw material filtering device for furfural production includes a screw extruder 1, and a filtering mechanism 2 is provided below one end of the screw extruder 1; the filtering mechanism 2 includes a fixed housing 21, and a filter assembly 23 is rotatably connected inside the fixed housing 21; the lower end of the filter assembly 23 is rotatably connected inside a bottom shell 27, and the bottom shell 27 is threadedly connected to the bottom of the fixed housing 21, a fixing seat 26 is fixed at the upper end of the bottom shell 27, and a motor 25 is installed on the fixing seat 26, and a gear 24 is installed on the output shaft of the motor 25; the gear 24 is used to drive the filter assembly 23;

[0044] The filter assembly 23 includes a filter housing 231, which is opened on both sides, and an arc-shaped filter 232 is fixed on the inner side of each opening; a cavity for liquid circulation is formed between the two arc-shaped filter screens 232; a plurality of filter holes are formed at the bottom of the filter housing 231, and the filter holes are arranged along the shape of the cavity between the two arc-shaped filter screens 232.

[0045] A top plate 233 is fixed on the top of the filter housing 231, and a through hole is opened above the arc filter 232; a gear ring 234 meshing with the gear 24 is installed on the outer side of the upper end of the filter housing 231; the filter housing 231 rotates in contact with the inner wall of the fixed housing 21.

[0046] By adopting the above technical solution, when in use, after the material is squeezed by the screw extruder 1, the juice passes through the fixed shell 21 and enters between the arc filter 232 and the slag retaining shell 22, and the impurities are intercepted by the arc filter 232 and remain in place; the filtered juice enters the cavity between the two arc filters 232, and then flows into the bottom shell 27 through the filter holes opened at the bottom of the filter shell 231;

[0047] When impurities gather between the arc filter screen 232 and the slag retaining shell 22, the motor 25 drives the gear ring 234 to rotate through the gear 24; after the filter shell 231 rotates 180 degrees, the slag retaining shell 22 where impurities are accumulated is placed on the outside, and the staff removes the slag retaining shell 22 to facilitate the cleaning of the impurities, while at this time, the inside is filtered through another arc filter screen 232 and the slag retaining shell 22.

[0048] The above scheme can realize simultaneous juice filtration and impurity cleaning, thereby ensuring that the equipment works without stopping, greatly improving the working efficiency of the equipment.

[0049] In this embodiment, a slag retaining shell 22 is clamped on the outer side of the arc filter 232 . The slag retaining shell 22 is arranged in an arc shape, and the arc center point of the slag retaining shell 22 is located on the central axis of the shell 211 .

[0050] By adopting the above technical solution, it can be ensured that the slag retaining shell 22 and the filter shell 231 can rotate in close contact with the inner wall of the fixed shell 21. Firstly, it can prevent the juice from flowing outward, and secondly, it can ensure that impurities can be brought out during rotation for cleaning.

[0051] See also Figure 7 and Fig.15 In this embodiment, the fixed housing 21 includes a housing 211, the top of which is connected to a connecting pipe 212 fixed to the screw extruder 1, and a connecting shell 213 is fixed to the bottom of the connecting pipe 212, and the connecting shell 213 is attached to the top of the top plate 233;

[0052] A through groove is provided on one side of the upper end of the fixed housing 21 for the gear 24 and the gear ring 234 to pass through and mesh with each other.

[0053] By adopting the above technical solution, the setting of the connecting pipe 212 ensures the connection effect with the screw extruder 1; the setting of the connecting shell 213 enables the juice to be smoothly transported to between the arc filter 232 and the slag retaining shell 22, avoiding flowing on the top plate 233 and causing waste.

[0054] Please see attached Figures 1 to 6 In this embodiment, a liquid infusion tube 28 is fixed to the bottom of the bottom shell 27, and the liquid infusion tube 28 is connected to the delivery pump 29, and the liquid outlet of the delivery pump 29 is connected to the diverter 210 through a pipeline; a plurality of diverter tubes are connected to one side of the diverter 210, and a juice collection tank 3 is installed on each diverter tube; a plurality of juice collection tanks 3 are fixed on the tank frame 4; the tank frame 4 is fixed to the frame 5.

[0055] By adopting the above technical solution, the filtered juice flows through the bottom shell 27 to the liquid delivery pipe 28, and is pressurized by the delivery pump 29 and delivered to the juice collection tank 3 for collection so as to be processed in the next step.

[0056] As a further elaboration of the present invention:

[0057] Furfural is usually produced from agricultural and forestry wastes rich in polypentoses, such as corn cobs, bagasse, rice husks, etc. These raw materials often contain a lot of impurities after collection, such as soil, sand, dust, and some fine plant residues. If they are not effectively filtered, they will have many adverse effects on subsequent production processes, such as affecting reaction efficiency and damaging production equipment.

[0058] To this end, we need to clean the raw materials by sedimentation and flotation.

[0059] For further information, please see the attached Figures 1 to 6 In this embodiment, a pneumatic separation and impurity removal mechanism 6 is provided at the upper end of the feed port of the screw extruder 1, and a slag collection box 9 is provided at the discharge end thereof; a mesh chain elevator 8 is provided above the feed port of the pneumatic separation and impurity removal mechanism 6, and a drying mechanism 7 is provided above the mesh chain elevator 8.

[0060] By adopting the above technical solution, the washed raw materials are drained, and the drained raw materials are transported through the mesh chain elevator 8. Since the raw materials are simply immersed or rinsed externally during washing, they are not soaked; therefore, drying is very convenient. We use the drying mechanism 7 to dry the raw materials during the transportation process. After drying, the raw materials are passed through the air separation and impurity removal mechanism 6 to remove the dust that has not been removed from the raw materials.

[0061] As a further explanation of the above embodiment, please refer to the attached Figure 6 The drying mechanism 7 includes a drying shell 71, and a plurality of heating plates 73 are arranged inside the drying shell 71. Two fans 72 for blowing hot air toward the chain hoist 8 are arranged on the top of the drying shell 71.

[0062] By adopting the above technical solution, when the chain elevator 8 transports the raw materials, multiple heating plates 73 heat the surrounding air, and the fan 72 blows the heated air to the raw materials, and the moisture on the outer surface of the raw materials is taken away by the dry wind, thereby achieving the drying effect. The raw materials still need to be pressed subsequently, so there is no need for excessive drying.

[0063] Please see attached Fig.14 In this embodiment, the wind separation and impurity removal mechanism 6 includes a wind separation machine housing 61 fixed to the frame body 5; the wind separation machine housing 61 has a feed port 62 at the upper end, and an inclined plate 63 is obliquely provided below the feed port 62; a negative pressure filter screen 64 is obliquely provided at the lower end of the inclined plate 63, and the other end of the negative pressure filter screen 64 is fixedly connected with a guide plate 65; the guide plate 65 is located above the discharge port 66;

[0064] Furthermore, two suction heads 67 are provided on the bottom side of the negative pressure filter 64; the suction head 67 is connected to the negative pressure fan 69 through a negative pressure suction pipe 68; the negative pressure fan 69 is installed on one side of the dust removal box 610, wherein the dust removal box 610 is fixed on the top of the air separator housing 61.

[0065] By adopting the above technical solution, when the dried raw material falls onto the inclined plate 63 inside the air separator housing 61 through the feed port 62 and slides downward along the inclined plate 63; at this time, the negative pressure fan 69 generates negative pressure, and in the process of the raw material falling, the lighter dust is extracted by the negative pressure suction pipe 68 connected to the filter head 67, and then transported to the dust removal box 610 for further processing, so as to avoid dust spreading and polluting the environment.

[0066] The clean raw material falls into the screw extruder 1 for squeezing.

[0067] The working principle is: when the chain hoist 8 is transporting the raw materials, multiple heating plates 73 heat the surrounding air, and the fan 72 blows the heated air to the raw materials, and removes the moisture on the outer surface of the raw materials through the dry wind. When the dried raw materials fall onto the inclined plate 63 inside the air separator housing 61 through the feed port 62, and slide down along the inclined plate 63; at this time, the negative pressure fan 69 generates negative pressure, and during the falling process of the raw materials, the lighter dust is extracted by the negative pressure suction pipe 68 connected to the filter head 67, and then transported to the dust removal box 610 for further processing to avoid dust diffusion and pollution of the environment; the clean raw materials fall into the screw extruder 1 for squeezing.

[0068] After being squeezed by the screw extruder 1, the juice passes through the fixed housing 21 and enters between the arc filter 232 and the slag retaining housing 22, and the impurities are intercepted by the arc filter 232 and remain in place; the filtered juice enters the cavity between the two arc filters 232, and then flows into the bottom housing 27 through the filter holes opened at the bottom of the filter housing 231;

[0069] When impurities gather between the arc filter screen 232 and the slag retaining shell 22, the motor 25 drives the gear ring 234 to rotate through the gear 24; after the filter shell 231 rotates 180 degrees, the slag retaining shell 22 where impurities are accumulated is placed on the outside, and the staff removes the slag retaining shell 22 to facilitate the cleaning of the impurities, while at this time, the inside is filtered through another arc filter screen 232 and the slag retaining shell 22.

[0070] The above scheme can realize simultaneous juice filtering and impurity cleaning, thereby ensuring that the equipment works without stopping, greatly improving the working efficiency of the equipment; the filtered juice flows into the infusion pipe 28 through the bottom shell 27, and is pressurized by the delivery pump 29 and delivered to the juice collection tank 3 for collection, so as to facilitate the next step of processing.

[0071] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0072] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A raw material filtering device for furfural production, characterized in that: The invention comprises a screw extruder (1), wherein a filter mechanism (2) is provided below one end of the screw extruder (1); the filter mechanism (2) comprises a fixed housing (21), wherein a filter assembly (23) is rotatably connected inside the fixed housing (21); the lower end of the filter assembly (23) is rotatably connected inside a bottom housing (27), and the bottom housing (27) is threadedly connected to the bottom of the fixed housing (21); a fixing seat (26) is fixed at the upper end of the bottom housing (27), and a motor (25) is mounted on the fixing seat (26), and a gear (24) is mounted on the output shaft of the motor (25); the gear (24) is used to drive the filter assembly (23); The filter assembly (23) comprises a filter housing (231), the filter housing (231) being provided with openings on both sides, and an arc-shaped filter (232) being fixed on the inner side of each opening; a cavity for liquid circulation is formed between the two arc-shaped filter screens (232); a plurality of filter holes are formed at the bottom of the filter housing (231), and the filter holes are arranged along the shape of the cavity between the two arc-shaped filter screens (232); A top plate (233) is fixed on the top of the filter housing (231), and a through hole is opened above the arc-shaped filter screen (232); a gear ring (234) meshingly connected to the gear (24) is mounted on the outer side of the upper end of the filter housing (231); the filter housing (231) rotates in contact with the inner wall of the fixed housing (21); The outer side of the arc-shaped filter screen (232) is clamped with a slag retaining shell (22), the slag retaining shell (22) is arranged in an arc shape, and the arc center point of the slag retaining shell (22) is located on the central axis of the shell (211).

2. The raw material filtering device for furfural production according to claim 1, characterized in that: The fixed housing (21) comprises a shell (211), the top of which is connected to a connecting pipe (212) fixed to the screw extruder (1), and a connecting shell (213) is fixed to the bottom of the connecting pipe (212), and the connecting shell (213) is attached to the top of the top plate (233); A through groove is provided on one side of the upper end of the fixed housing (21) to facilitate the gear (24) and the gear ring (234) to pass through and mesh with each other.

3. The raw material filtering device for furfural production according to claim 1, characterized in that: A liquid infusion tube (28) is fixed to the bottom of the bottom shell (27), the liquid infusion tube (28) is connected to a delivery pump (29), and the liquid outlet of the delivery pump (29) is connected to a diverter (210) via a pipeline; a plurality of diverter tubes are connected to one side of the diverter (210), and a juice collection tank (3) is mounted on each diverter tube; the plurality of juice collection tanks (3) are fixed to a tank frame (4); and the tank frame (4) is fixed to the frame (5).

4. The raw material filtering device for furfural production according to claim 1, characterized in that: A pneumatic impurity removal mechanism (6) is provided at the upper end of the feed inlet of the screw extruder (1), and a slag collection box (9) is provided at the discharge end thereof; a mesh chain elevator (8) is provided above the feed inlet of the pneumatic impurity removal mechanism (6), and a drying mechanism (7) is provided above the mesh chain elevator (8).

5. The raw material filtering device for furfural production according to claim 4, characterized in that: The air separation and impurity removal mechanism (6) comprises an air separation machine housing (61) fixed to a frame body (5); the upper end of the air separation machine housing (61) is provided with a feed inlet (62), and an inclined plate (63) is obliquely provided below the feed inlet (62); a negative pressure filter (64) is obliquely provided at the lower end of the inclined plate (63), and the other end of the negative pressure filter (64) is fixedly engaged with a guide plate (65); the guide plate (65) is located above the discharge inlet (66).

6. The raw material filtering device for furfural production according to claim 5, characterized in that: Two suction filter heads (67) are provided on the bottom side of the negative pressure filter (64); the suction filter head (67) is connected to a negative pressure fan (69) via a negative pressure suction pipe (68); the negative pressure fan (69) is installed on one side of a dust removal box (610), wherein the dust removal box (610) is fixed on the top of the air separator housing (61).

7. The raw material filtering device for furfural production according to claim 4, characterized in that: The drying mechanism (7) comprises a drying shell (71), a plurality of heating plates (73) are arranged inside the drying shell (71), and two fans (72) for blowing hot air toward the mesh chain elevator (8) are arranged on the top of the drying shell (71).

Images