Lignin washing and filtering device for plant fiber raw material hydrolysate

Abstract

The lignin washing and filtering device comprises a container, a filtering piece and a first sponge, a containing space is formed in the container, a plurality of filtering holes located below the containing space are formed in the bottom of the container, the upper ends of the filtering holes are communicated with the containing space, and the lower ends of the filtering holes are communicated with the first sponge. The lower ends of the filter holes penetrate through the bottom of the container; the filtering piece is arranged in the containing space, covers the filtering holes and is used for filtering lignin floccules; the plurality of first sponges are respectively arranged in the filter holes, the upper parts of the first sponges are connected with the filter piece, and the first sponges are used for allowing liquid of plant fiber raw material hydrolysate to penetrate through. According to the lignin washing and filtering device for the plant fiber raw material hydrolysate, collapse of lignin floccules is avoided, meanwhile, the filtering speed of separation of liquid glucose and lignin can be increased, and the separation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of solid-liquid separation, in particular to a lignin washing and filtering device for hydrolyzed liquid of plant fiber raw materials. Background Art

[0002] After the straw is hydrolyzed, polysaccharides such as cellulose and hemicellulose become water-soluble sugar liquid, while lignin remains in a solid state. In order to smoothly carry out subsequent processing procedures such as sugar liquid fermentation, lignin needs to be separated from the sugar liquid, and sugar-containing lignin needs multi-stage washing to be completely separated from sugar. The solid-liquid separation of washed lignin and sugar liquid can be achieved by simple filtration, filter pressing, suction filtration, centrifugation, etc. Since the lignin solid is micron- to nano-scale in size, direct filtration will cause permeation, and direct centrifugation in an industrial centrifuge with a speed below 4000 rpm cannot settle. Therefore, flocculation is required to form larger flocs before solid-liquid separation. However, the flocs formed by lignin are very sensitive to force, that is, the flocs are very easy to collapse after being subjected to force. Therefore, the separation methods such as filter pressing, suction filtration, and centrifugation that will apply external force to the flocs are all poor in effect, and the speed of simple filtration is too slow.

[0003] Therefore, it is necessary to provide a lignin washing and filtering device for plant fiber raw material hydrolyzate to avoid the collapse of lignin flocs, while accelerating the filtration speed of separating sugar solution from lignin and improving the separation efficiency. Utility Model Content

[0004] The utility model aims to provide a lignin washing and filtering device for hydrolyzed liquid of plant fiber raw materials, so as to avoid the collapse of lignin flocs, and at the same time accelerate the filtering speed of separating sugar solution from lignin and improve the separation efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides a lignin washing and filtering device for a hydrolyzate of a plant fiber raw material, comprising a container, a filter element and a first sponge, wherein a accommodating space is provided in the container, and a plurality of filter holes located below the accommodating space are provided at the bottom of the container, the upper ends of the filter holes are communicated with the accommodating space, and the lower ends of the filter holes pass through the bottom of the container; the filter element is arranged in the accommodating space and covers the tops of the filter holes, and the filter element is used to filter lignin flocs; a plurality of the first sponges are respectively arranged in each of the filter holes, and the upper part of the first sponges is connected to the filter element, and the first sponges are used for allowing the liquid of the hydrolyzate of the plant fiber raw material to pass through.

[0006] Preferably, the lignin washing and filtering device for the plant fiber raw material hydrolyzate also includes a bracket and a second sponge, the bracket is installed below the container, the bracket is provided with a mounting groove, the mounting groove is connected to the filter hole, the second sponge is arranged in the mounting groove, the lower part of the first sponge is connected to the second sponge, the bracket is also provided with a filtrate channel connected to the mounting groove, and the filtrate channel is used for allowing the liquid that passes through the second sponge to flow out.

[0007] Preferably, the first sponge and the second sponge are in an integrated structure.

[0008] Preferably, the first sponge and the second sponge are in a split structure.

[0009] Preferably, the bracket is detachably connected to the container.

[0010] Preferably, the lignin washing and filtering device for the hydrolyzate of plant fiber raw material further comprises a collecting frame, a filtrate collecting tank is provided on the collecting frame, the bracket is arranged in the filtrate collecting tank, and the filtrate channel is connected to the filtrate collecting tank.

[0011] Preferably, the lignin washing and filtering device for the plant fiber raw material hydrolyzate also includes a valve, and a switch port connected to the filtrate collecting tank is provided at the bottom of the collecting frame, and the valve is arranged at the switch port and is used to control the opening or closing of the switch port.

[0012] Preferably, the filter element is in a filter bag structure, the side wall of the filter element is in close contact with the side wall of the accommodating space, and the bottom of the filter element is in close contact with the bottom of the accommodating space.

[0013] Preferably, the lignin washing and filtering device for the plant fiber raw material hydrolyzate further comprises a stirring device, wherein the stirring device is disposed on the container and extends into the accommodating space, and the stirring device is used for stirring the plant fiber raw material hydrolyzate in the accommodating space.

[0014] Preferably, the stirring device includes a motor and a stirring paddle, the motor is arranged on the container, the stirring paddle is penetrated in the accommodating space, the output end of the motor is connected to the stirring paddle, and the motor is used to drive the stirring paddle to rotate and stir.

[0015] Compared with the prior art, the lignin washing and filtering device for plant fiber raw material hydrolyzate of the utility model sets a filter in the accommodating space of the container, and uses the filter to filter the lignin flocs of the plant fiber raw material hydrolyzate in the accommodating space, so that the lignin flocs remain in the accommodating space in a floc state while the liquid of the plant fiber raw material hydrolyzate passes through the filter. At the same time, the utility model also sets a filter hole at the bottom of the container, and sets a first sponge connected to the filter in the filter hole. Under the water absorption of the first sponge, the liquid of the plant fiber raw material hydrolyzate can be continuously accelerated to pass through the filter and be filtered out through the first sponge. Therefore, the lignin washing and filtering device for plant fiber raw material hydrolyzate of the utility model avoids the collapse of the lignin flocs, and at the same time can accelerate the filtration speed of separating the sugar solution and lignin, thereby improving the separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a longitudinal sectional view of a first embodiment of the lignin washing and filtering device for hydrolyzed liquid of plant fiber raw materials of the utility model.

[0017] Figure 2 It is a longitudinal sectional view of the container of the present utility model.

[0018] Figure 3 yes Figure 1 An exploded view of a lignin washing and filtration device for hydrolyzate of plant fiber raw materials is shown.

[0019] Figure 4 It is an exploded view of the second embodiment of the lignin washing and filtering device for plant fiber raw material hydrolyzate of the utility model.

[0020] Figure 5 It is a longitudinal sectional view of a third embodiment of the lignin washing and filtering device for hydrolyzed liquid of plant fiber raw materials of the utility model.

[0021] Figure 6 It is a longitudinal sectional view of a fourth embodiment of the lignin washing and filtering device for hydrolyzed liquid of plant fiber raw materials of the utility model. DETAILED DESCRIPTION

[0022] In order to explain the technical content and structural features of the present invention in detail, further description will be given below in combination with the embodiments and the accompanying drawings.

[0023] See also Figure 1 and Figure 2The lignin washing and filtering device 100 of the plant fiber raw material hydrolyzate of the utility model comprises a container 1, a filter element 2 and a first sponge 3. A accommodating space 11 is provided in the container 1. A plurality of filter holes 12 located below the accommodating space 11 are provided at the bottom of the container 1. The upper ends of the filter holes 12 are communicated with the accommodating space 11, and the lower ends of the filter holes 12 pass through the bottom of the container 1; the filter element 2 is arranged in the accommodating space 11 and covers the upper parts of the filter holes 12, and the filter element 2 is used to filter the lignin flocs; a plurality of first sponges 3 are respectively arranged in each filter hole 12, and the upper part of the first sponge 3 is connected to the filter element 2, and the first sponge 3 is used for allowing the liquid of the plant fiber raw material hydrolyzate to pass through.

[0024] The utility model utilizes the filter element 2 to filter the lignin flocs of the plant fiber raw material hydrolyzate in the accommodating space 11 of the container 1, so that the lignin flocs remain in the accommodating space 11 in a floc state while the liquid of the plant fiber raw material hydrolyzate passes through the filter element 2. At the same time, the utility model further provides a filter hole 12 at the bottom of the container 1, and provides a first sponge 3 connected to the filter element 2 in the filter hole 12. Under the water absorption effect of the first sponge 3, the liquid of the plant fiber raw material hydrolyzate can be continuously accelerated to pass through the filter element 2 and be filtered out through the first sponge 3.

[0025] See also Figure 1 In one embodiment, the lignin washing and filtering device 100 of the plant fiber raw material hydrolyzate of the utility model further includes a bracket 4 and a second sponge 5. The bracket 4 is installed below the container 1. The bracket 4 is provided with a mounting groove 41, which is connected to the filter hole 12. The second sponge 5 is arranged in the mounting groove 41. The lower part of the first sponge 3 is connected to the second sponge 5. The bracket 4 is also provided with a filtrate channel 42 connected to the mounting groove 41. The filtrate channel 42 is used for the liquid passing through the second sponge 5 to flow out. By adding the second sponge 5, the second sponge 5 is used to further accelerate the liquid to pass through the first sponge 3, so that the liquid filtered by each first sponge 3 is filtered out by the second sponge 5, and finally flows out through the filtrate channel 42 of the bracket 4. Specifically, the filtrate channel 42 is arranged at the bottom of the bracket 4, so that the liquid can flow out quickly under the action of gravity, but it is not limited to this. The setting position of the filtrate channel 42 is not limited to this. For example, the filtrate channel 42 can also be arranged on the side wall of the bracket 4. The number of the filtrate channels 42 may be one, two, three, etc., and those skilled in the art may determine the number according to actual needs.

[0026] See also Figure 4 In one embodiment, the first sponge 3 and the second sponge 5 are in an integrated structure.

[0027] See also Figure 1 and Figure 3 In one embodiment, the first sponge 3 and the second sponge 5 are in a split structure.

[0028] See also Figure 3 and Figure 4 In one embodiment, the bracket 4 is detachably connected to the container 1. The container 1 can be detached from the bracket 4 to facilitate inspection and replacement of the first sponge 3 and the second sponge 5. However, the present invention is not limited thereto. The detachable manner between the bracket 4 and the container 1 can adopt existing bolt connection or snap connection, etc.

[0029] See also Figure 1 In one embodiment, the lignin washing and filtering device 100 of the plant fiber raw material hydrolyzate of the utility model further includes a collecting frame 6, on which a filtrate collecting tank 61 is provided, and the bracket 4 is disposed in the filtrate collecting tank 61, and the filtrate channel 42 is connected to the filtrate collecting tank 61. The liquid flowing out of the filtrate channel 42 of the bracket 4 can be collected in the filtrate collecting tank 61. Among them, the collecting frame 6 and the bracket 4 can be an integrated structure, but it is not limited thereto. For example, the collecting frame 6 and the bracket 4 can also be a split structure.

[0030] See also Figure 1 In one embodiment, the lignin washing and filtering device 100 of the plant fiber raw material hydrolyzate of the utility model further includes a valve 7. The bottom of the collecting frame 6 is provided with a switch port 62 connected to the filtrate collecting tank 61. The valve 7 is arranged at the switch port 62 and is used to control the opening or closing of the switch port 62. The switch port 62 is opened by the valve 7 so that the filtered liquid in the filtrate collecting tank 61 can flow out and be transported to the next process.

[0031] See also Figure 5 In one embodiment, the filter element 2 is a filter bag structure, the side wall of the filter element 2 is closely attached to the side wall of the accommodating space 11, and the bottom of the filter element 2 is closely attached to the bottom of the accommodating space 11. However, the structure of the filter element 2 is not limited to this. For example, Figure 1 As shown, the structure of the filter element 2 can also be a filter cloth structure.

[0032] See also Figure 6In one embodiment, the lignin washing and filtering device 100 of the plant fiber raw material hydrolyzate of the utility model further includes a stirring device 8, which is arranged on the container 1 and extends into the accommodating space 11, and is used to stir the plant fiber raw material hydrolyzate located in the accommodating space 11. The plant fiber raw material hydrolyzate in the accommodating space 11 of the container 1 can be properly stirred by the stirring device 8, so that the lignin in the hydrolyzate forms lignin flocs with the participation of the flocculant. Specifically, the stirring device 8 includes a motor 81 and a stirring paddle 82, the motor 81 is arranged on the container 1, the stirring paddle 82 is penetrated in the accommodating space 11, the output end of the motor 81 is connected to the stirring paddle 82, and the motor 81 is used to drive the stirring paddle 82 to rotate and stir. More specifically, the motor 81 can select an existing reduction motor, but is not limited thereto.

[0033] Combination Figures 1 to 6 The specific working principle of the lignin washing and filtering device 100 of the plant fiber raw material hydrolyzate of the utility model is as follows:

[0034] The plant fiber raw material hydrolyzate is placed in the accommodation space 11 of the container 1, and the plant fiber raw material hydrolyzate containing lignin is added with a flocculant and flocculated under the stirring of the stirring device 8. After the flocculation is completed, the stirring device 8 stops working, and then the filter 2 filters the lignin flocs of the plant fiber raw material hydrolyzate in the accommodation space 11, so that the lignin flocs remain in the accommodation space 11 in a floc state, and the liquid of the plant fiber raw material hydrolyzate passes through the filter 2. Under the water absorption of the first sponge 3 and the second sponge 5, the liquid of the plant fiber raw material hydrolyzate can be continuously accelerated to pass through the filter 2 and be filtered out through the first sponge 3 and the second sponge 5. The filtered liquid enters the filtrate collection tank 61 through the filtrate channel 42 of the bracket 4 to be collected in the filtrate collection tank 61. Finally, the switch port 62 of the collection frame 6 is opened by the valve 7, so that the filtered liquid in the filtrate collection tank 61 flows out, and is transported to the next process.

[0035] In summary, the lignin washing and filtering device 100 of the plant fiber raw material hydrolyzate of the utility model uses the filter element 2 to filter the lignin flocs of the plant fiber raw material hydrolyzate in the accommodating space 11, so that the lignin flocs remain in the accommodating space 11 in a floc state while the liquid of the plant fiber raw material hydrolyzate passes through the filter element 2, thereby avoiding the collapse of the lignin flocs. At the same time, the filtration speed of separating the sugar solution and lignin is increased by utilizing the water absorption effect of the first sponge 3 and the second sponge 5, thereby improving the separation efficiency.

[0036] The above disclosure is only a preferred example of the present invention, which cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are all within the scope of the present invention.

Claims

1. A lignin washing and filtering device for hydrolyzed liquid of plant fiber raw materials, characterized in that: include: A container, wherein a containing space is provided in the container, and a plurality of filter holes are provided at the bottom of the container and are located below the containing space, wherein the upper ends of the filter holes are communicated with the containing space, and the lower ends of the filter holes penetrate the bottom of the container; A filter element, the filter element is arranged in the accommodating space and covers the filter hole, and the filter element is used to filter the lignin flocs; A first sponge, wherein a plurality of the first sponges are respectively arranged in each of the filter holes, the upper portion of the first sponge is connected to the filter element, and the first sponge is used for allowing the liquid of the plant fiber raw material hydrolyzate to pass through.

2. The lignin washing and filtering device for plant fiber raw material hydrolyzate according to claim 1, characterized in that: It also includes a bracket and a second sponge, the bracket is installed below the container, the bracket is provided with a mounting groove, the mounting groove is connected to the filter hole, the second sponge is arranged in the mounting groove, the lower part of the first sponge is connected to the second sponge, the bracket is also provided with a filtrate channel connected to the mounting groove, the filtrate channel is used for the liquid passing through the second sponge to flow out.

3. The lignin washing and filtering device for plant fiber raw material hydrolyzate according to claim 2, characterized in that: The first sponge and the second sponge are in an integrated structure.

4. The lignin washing and filtering device for plant fiber raw material hydrolyzate according to claim 2, characterized in that: The first sponge and the second sponge are in a split structure.

5. The lignin washing and filtering device for plant fiber raw material hydrolyzate according to claim 2, characterized in that: The bracket is detachably connected to the container.

6. The lignin washing and filtering device for plant fiber raw material hydrolyzate according to claim 2, characterized in that: It also includes a collecting frame, on which a filtrate collecting tank is provided, the bracket is arranged in the filtrate collecting tank, and the filtrate channel is communicated with the filtrate collecting tank.

7. The lignin washing and filtering device for plant fiber raw material hydrolyzate according to claim 6, characterized in that: It also includes a valve. The bottom of the collection frame is provided with a switch port connected to the filtrate collection tank. The valve is arranged at the switch port and is used to control the switch port to be opened or closed.

8. The lignin washing and filtering device for plant fiber raw material hydrolyzate according to claim 1, characterized in that: The filter element is in a filter bag structure, the side wall of the filter element is in close contact with the side wall of the accommodating space, and the bottom of the filter element is in close contact with the bottom of the accommodating space.

9. The lignin washing and filtering device for plant fiber raw material hydrolyzate according to claim 1, characterized in that: It also includes a stirring device, which is arranged on the container and extends into the accommodating space, and is used for stirring the plant fiber raw material hydrolyzate in the accommodating space.

10. The lignin washing and filtering device for plant fiber raw material hydrolyzate according to claim 9, characterized in that: The stirring device includes a motor and a stirring paddle. The motor is arranged on the container. The stirring paddle is inserted into the accommodating space. The output end of the motor is connected to the stirring paddle. The motor is used to drive the stirring paddle to rotate and stir.

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