Lignin solution acidification equipment

Abstract

The utility model relates to the field of lignin extraction and discloses lignin solution acidification equipment which comprises a supporting table, a mixing barrel is fixedly connected to the upper portion of the right side of the supporting table, an upper cover is arranged at the top end of the mixing barrel, a conveying pipe is arranged on the left side of the mixing barrel, and a settling barrel is arranged on the left side of the supporting table. The left side of the conveying pipe is fixedly connected to the outer side of the precipitation barrel in a penetrating mode, a mixing mechanism is arranged on the inner wall of the mixing barrel and comprises a stirring assembly and an auxiliary assembly, the stirring assembly comprises a driving motor, the driving motor is fixedly connected to the upper side and the lower side of the supporting table, and a first rotating rod is rotationally connected to the inner wall of the mixing barrel. According to the lignin acidification device, the stirring assembly and the auxiliary assembly are used in cooperation, waste liquid with lignin and acid liquid are injected into the mixing barrel, the sufficiency and efficiency of the mixing process of the lignin and the acid liquid are ensured through cooperation of the stirring assembly and the auxiliary assembly, and then the acidification efficiency of the lignin is improved.

Description

Technical Field

[0001] The utility model relates to the field of lignin extraction, in particular to a lignin solution acid precipitation device. Background Art

[0002] In industries such as papermaking and biomass energy, it is often necessary to recover lignin from waste liquids or raw materials. The solubility of lignin in the solution will change under certain conditions (such as a specific pH value). When acid is added to the lignin solution, the pH value of the solution decreases, which enhances the interaction between lignin molecules. The originally dissolved lignin will gradually aggregate and precipitate from the solution to form a precipitate.

[0003] Most of the existing lignin solution acid precipitation equipment mixes the waste liquid containing lignin with the acid solution by stirring. However, relying solely on traditional mechanical stirring methods, such as a single-axis stirring rod, may result in insufficient and uniform mixing. Due to the limited strength and range of stirring, the effect and efficiency of the acid precipitation are affected to a certain extent, which may cause some lignin to fail to fully react with the acid solution, thereby reducing the acid precipitation efficiency of the lignin. Therefore, a lignin solution acid precipitation equipment is proposed to solve the above problems. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a lignin solution acid precipitation equipment, which aims to improve the problem in the existing technology that "due to the limited stirring strength and range, some lignin may fail to fully react with the acid solution, thereby reducing the acid precipitation efficiency of lignin."

[0005] The top of the mixing barrel is inserted into the inner wall of the upper cover, and the left and right sides of the mixing barrel are fixedly connected to the mixing barrel, and the left and right sides of the mixing barrel are fixedly connected to the mixing barrel.

[0006] As a further description of the above technical solution:

[0007] The auxiliary component includes an air duct, which is opened on the inner wall of the rotating rod 2 and the rotating rod 1. The upper inner wall of the stirring rod 2 and the lower inner wall of the stirring rod 1 are hollow. Air holes are opened through the outer sides of the stirring rod 2 and the stirring rod 1. There are multiple groups of air holes. A connecting pipe is fixedly connected to the top of the upper cover. The interior of the connecting pipe is connected to the air duct, and the interior of the air duct is connected to the hollow position of the stirring rod 2 and the stirring rod 1.

[0008] As a further description of the above technical solution:

[0009] The outer sides of the second rotating rod, the first rotating rod, the first stirring rod and the second stirring rod are covered with corrosion-resistant coating.

[0010] As a further description of the above technical solution:

[0011] A rubber gasket is provided at the top end of the second rotating rod.

[0012] As a further description of the above technical solution:

[0013] The second stirring rod and the first stirring rod are both inclined, and multiple groups are provided.

[0014] As a further description of the above technical solution:

[0015] A movable cover is provided on the right side of the upper cover, and a limit assembly is provided on the right side of the support platform. The limit assembly includes a pull rod, which is slidably connected to the inner wall of the support platform, and the rear side of the pull rod is fixedly connected to a limit block.

[0016] As a further description of the above technical solution:

[0017] A baffle is fixedly connected to the outside of the pull rod, and the front side of the baffle is elastically connected to the support platform through a compression spring. A slot is opened on the movable cover near the rear side of the limit block, and the limit block is inserted into the inner wall of the slot.

[0018] As a further description of the above technical solution:

[0019] A pull ring is provided on the inner wall of the front side of the pull rod.

[0020] The utility model has the following beneficial effects:

[0021] 1. In the present invention, the waste liquid containing lignin and the acid solution are injected into the mixing barrel by the coordinated use of the stirring component and the auxiliary component. The coordination of the stirring component and the auxiliary component ensures the sufficiency and efficiency of the mixing process of lignin and the acid solution, thereby improving the acid precipitation efficiency of lignin.

[0022] 2. In the present invention, by using the limiting assembly in conjunction with the movable cover, the limiting assembly can quickly release the limit on the movable cover, making it more convenient to add waste liquid and acid solution to the mixing barrel, thereby improving the convenience and efficiency of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the overall device in the utility model;

[0024] Figure 2 This is a schematic diagram of the split three-dimensional structure of the stirring assembly and the mixing barrel in the present invention;

[0025] Figure 3 It is a front perspective cross-sectional diagram of the rotating rod 1 and the rotating rod 2 in the present invention;

[0026] Figure 4 This is a schematic diagram of a left-side perspective cross-sectional structure of the stirring rod 2 in the present invention;

[0027] Figure 5 This is a schematic diagram of the open three-dimensional structure of the movable cover in the utility model;

[0028] Figure 6 For this utility model Figure 5 Schematic diagram of the three-dimensional structure at A in the middle.

[0029] Legend:

[0030] 1. Support platform; 2. Mixing barrel; 3. Upper cover; 4. Delivery pipe; 5. Sedimentation barrel; 61. Drive motor; 62. Rotating rod 1; 63. Rotating rod 2; 64. Stirring rod 1; 65. Stirring rod 2; 71. Air duct; 72. Air hole; 73. Connecting pipe; 8. Movable cover; 91. Pull rod; 92. Limit block; 93. Compression spring; 94. Slot. DETAILED DESCRIPTION

[0031] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0032] Reference Figure 1 - Figure 3The utility model provides an embodiment of a lignin solution acid precipitation equipment, including a support platform 1 for supporting a mixing barrel 2 and a sedimentation barrel 5. The mixing barrel 2 is fixedly connected to the upper right side of the support platform 1, which serves as the main place for the mixing reaction of the waste liquid and the acid solution, providing space for operations such as stirring and mixing. The top of the mixing barrel 2 is provided with an upper cover 3, which cooperates with the movable cover 8 to close the mixing barrel 2 to prevent the solution from splashing during the stirring and mixing process, thereby ensuring the safety of operation, and at the same time providing an installation basis for the rotating rod 2 63 and the card slot 94 of the stirring component and the auxiliary component. A delivery pipe 4 is provided on the left side of the mixing barrel 2, and a valve is provided inside the delivery pipe 4 for connecting the mixing barrel 2 and the sedimentation barrel 5, and transporting the waste liquid after mixing treatment in the mixing barrel 2 to the sedimentation barrel 5 for the next sedimentation and separation operation. The sedimentation barrel 5 is provided on the left side of the support platform 1 for acid precipitation and precipitation of lignin in the waste liquid. The left side of the delivery pipe 4 passes through and is fixedly connected to the outside of the sedimentation barrel 5. The inner wall of the mixing barrel 2 is provided with a mixing mechanism for fully mixing the waste liquid and the acid solution.

[0033] Furthermore, the mixing mechanism includes a stirring assembly and an auxiliary assembly. The stirring assembly includes a driving motor 61, which serves as a power source to provide power for the stirring operation and drives the rotating rod 62 to rotate so that the components in the solution are fully mixed. The driving motor 61 is fixedly connected to the lower side of the upper part of the support platform 1. The inner wall of the mixing barrel 2 is rotatably connected to the rotating rod 62, which rotates under the drive of the driving motor 61 to provide installation support for the stirring rod 64. The stirring rod 64 is driven by its own rotation to perform a stirring action, and works in conjunction with the rotating rod 63 to achieve the mixing of the mixing barrel 2. In order to stir the solutions at different positions inside, the bottom end of the rotating rod 1 62 is fixedly connected to the top of the output shaft of the driving motor 61, and the upper side of the rotating rod 1 62 is rotatably connected to the rotating rod 2 63, and the top end of the rotating rod 2 63 is inserted into the inner wall of the upper cover 3, which can limit the rotating rod 2 63 to prevent it from rotating. At the same time, the rotating rod 2 63 and the multiple groups of stirring rods 2 65 stop inside the mixing barrel 2, disturbing the water flow stirred by the stirring rod 1 64, thereby improving its stirring efficiency, and providing a channel for gas delivery through the airway 71, participating in auxiliary stirring, and further improving its stirring efficiency.

[0034] Reference Figure 2 - Figure 4, the left and right sides of the rotating rod 1 62 are fixedly connected to the stirring rod 1 64, which is stationary inside the mixing barrel 2 to disturb the water flow and improve the stirring efficiency. The left and right sides of the lower part of the rotating rod 2 63 are fixedly connected to the stirring rod 2 65, which is used to drive the wastewater and acid liquid in the mixing barrel 2 to mix. The stirring rod 2 65 and the stirring rod 1 64 are both inclined, and there are multiple groups. The auxiliary component includes an airway 71, which serves as a channel for gas delivery, introduces external gas into the hollow part of the stirring rod 2 65 and the stirring rod 1 64, and impacts the waste liquid through the gas to realize the auxiliary stirring function, thereby further improving the stirring efficiency. The airway 71 is opened on the inner wall of the rotating rod 2 63 and the rotating rod 1 62, and the upper inner wall of the stirring rod 2 65 and the lower inner wall of the stirring rod 1 64 are hollow.

[0035] Furthermore, air holes 72 are provided on the outside of the stirring rod 2 65 and the stirring rod 1 64, so that the gas in the air channel 71 can be discharged into the mixing barrel 2, which may play a role in assisting stirring and increasing the fluidity of the solution. The discharge of gas generates air flow disturbance and enhances the stirring effect. There are multiple groups of air holes 72. A connecting pipe 73 is fixedly connected to the top of the upper cover 3 to connect to the external air source to introduce the external gas into the mixing mechanism to ensure that the gas can smoothly enter the stirring assembly to achieve the function of assisting stirring. The interior of the connecting pipe 73 is connected to the air channel 71, and the interior of the air channel 71 is connected to the hollow position of the stirring rod 2 65 and the stirring rod 1 64. The outer sides of the rotating rod 2 63, the rotating rod 1 62, the stirring rod 1 64 and the stirring rod 2 65 are covered with corrosion-resistant coating, which can extend the service life of these components and ensure the stable operation of the equipment. A rubber gasket is provided on the top of the rotating rod 2 63 to seal and prevent gas or solution from leaking from the connection between the rotating rod 2 63 and the upper cover 3.

[0036] Reference Figure 5 and Figure 6 A movable cover 8 is provided on the right side of the upper cover 3, which is convenient for the operator to add materials to the mixing barrel 2. At the same time, a sealing gasket is provided at the bottom to improve the sealing effect. A limit assembly is provided on the right side of the support platform 1. The limit assembly includes a pull rod 91, which drives the limit block 92 to move by pulling to limit or unlock the movable cover 8. The pull rod 91 is slidably connected to the inner wall of the support platform 1, and the rear side of the pull rod 91 is fixedly connected to the limit block 92, which is inserted into the inner wall of the slot 94 of the movable cover 8 to fix the movable cover 8. During the operation of the equipment, it is ensured that the movable cover 8 will not be accidentally opened, thereby ensuring the safety and stability of the operation.

[0037] Furthermore, a baffle is fixedly connected to the outside of the pull rod 91 for connecting to a compression spring 93. The front side of the baffle is elastically connected to the support platform 1 through the compression spring 93, providing elastic restoring force for the pull rod 91, so that the limit block 92 remains in the limit position, ensuring that the limit block 92 can firmly fix the movable cover 8. The movable cover 8 is provided with a slot 94 near the rear side of the limit block 92, which cooperates with the limit block 92 to provide a plug-in position for the limit block 92, thereby fixing the movable cover 8 and ensuring that the movable cover 8 can be stably in a closed state when it needs to be fixed. The limit block 92 is inserted into the inner wall of the slot 94, and a pull ring is provided on the inner wall of the front side of the pull rod 91 to facilitate the operator to pull the pull rod 91.

[0038] Working principle: When in use, the operator first pulls the pull rod 91 through the pull ring, and the pull rod 91 drives the limit block 92 to move, so that the limit block 92 disengages from the slot 94 of the movable cover 8. At this time, the compression spring 93 is compressed, and the movable cover 8 can be opened to add the waste liquid and acid solution into the mixing barrel 2.

[0039] After the operation is completed, the movable cover 8 is closed and the pull rod 91 is released. Under the elastic restoring force of the compression spring 93, the pull rod 91 pushes the limit block 92 to be reinserted into the slot 94 to fix the movable cover 8.

[0040] At this time, the drive motor 61 is started, and the drive motor 61 drives the rotating rod 1 62 to rotate, and the stirring rods 1 64 on the left and right sides of the rotating rod 1 62 rotate accordingly, stirring the waste liquid and acid solution in the mixing barrel 2, so that the components in the solution are fully mixed and evenly mixed. The rotating rod 2 63 is inserted into the inner wall of the upper cover 3 to prevent itself from rotating. At the same time, the water flow stirred by the stirring rod 1 64 is disturbed by multiple groups of stirring rods 2 65 to improve the stirring efficiency.

[0041] Then, an external gas source is connected through a connecting pipe 73, and the gas enters the airway 71 through the connecting pipe 73 at the top of the upper cover 3, and the gas is introduced into the hollow parts of the stirring rod 2 65 and the stirring rod 1 64. A plurality of groups of air holes 72 are provided on the outside of the stirring rod 2 65 and the stirring rod 1 64. The gas is discharged into the mixing barrel 2 from the air holes 72, impacting the waste liquid, generating air flow disturbance, realizing the function of auxiliary stirring, and further improving the stirring efficiency.

[0042] After the waste liquid and the acid solution are fully mixed in the mixing barrel 2, the valve inside the delivery pipe 4 is opened to deliver the mixed solution to the precipitation barrel 5. In the precipitation barrel 5, the lignin in the waste liquid is acid-precipitated and precipitated.

[0043] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lignin solution acid precipitation device, comprising a support platform (1), characterized in that: A mixing barrel (2) is fixedly connected to the upper right side of the support platform (1), a top cover (3) is provided on the top of the mixing barrel (2), a delivery pipe (4) is provided on the left side of the mixing barrel (2), a sedimentation barrel (5) is provided on the left side of the support platform (1), the delivery pipe (4) passes through the left side and is fixedly connected to the outside of the sedimentation barrel (5), a mixing mechanism is provided on the inner wall of the mixing barrel (2), the mixing mechanism includes a stirring assembly and an auxiliary assembly, the stirring assembly includes a driving motor (61), and the driving motor (61) is fixedly connected On the lower side of the upper part of the support platform (1), the inner wall of the mixing barrel (2) is rotatably connected to a rotating rod 1 (62), the bottom end of the rotating rod 1 (62) is fixedly connected to the top end of the output shaft of the driving motor (61), the upper side of the rotating rod 1 (62) is rotatably connected to a rotating rod 2 (63), the top end of the rotating rod 2 (63) is inserted into the inner wall of the upper cover (3), the left and right sides of the rotating rod 1 (62) are fixedly connected to stirring rod 1 (64), and the left and right sides of the lower part of the rotating rod 2 (63) are fixedly connected to stirring rod 2 (65).

2. A lignin solution acid precipitation device according to claim 1, characterized in that: The auxiliary component includes an air channel (71), the air channel (71) is opened on the inner wall of the rotating rod 2 (63) and the rotating rod 1 (62), the upper inner wall of the stirring rod 2 (65) and the lower inner wall of the stirring rod 1 (64) are hollow, and the outer sides of the stirring rod 2 (65) and the stirring rod 1 (64) are penetrated by air holes (72), and the air holes (72) are opened in multiple groups. The top of the upper cover (3) is fixedly connected with a connecting pipe (73), the interior of the connecting pipe (73) is communicated with the air channel (71), and the interior of the air channel (71) is communicated with the hollow positions of the stirring rod 2 (65) and the stirring rod 1 (64).

3. A lignin solution acid precipitation device according to claim 1, characterized in that: The outer sides of the second rotating rod (63), the first rotating rod (62), the first stirring rod (64) and the second stirring rod (65) are covered with corrosion-resistant coating.

4. A lignin solution acid precipitation device according to claim 1, characterized in that: A rubber gasket is provided at the top of the second rotating rod (63).

5. The lignin solution acid precipitation equipment according to claim 1, characterized in that: The second stirring rod (65) and the first stirring rod (64) are both inclined and provided in multiple groups.

6. The lignin solution acid precipitation equipment according to claim 1, characterized in that: A movable cover (8) is provided on the right side of the upper cover (3), and a limit assembly is provided on the right side of the support platform (1). The limit assembly includes a pull rod (91), the pull rod (91) is slidably connected to the inner wall of the support platform (1), and the rear side of the pull rod (91) is fixedly connected to a limit block (92).

7. The lignin solution acid precipitation equipment according to claim 6, characterized in that: A baffle is fixedly connected to the outside of the pull rod (91), and the front side of the baffle is elastically connected to the support platform (1) via a compression spring (93). A slot (94) is provided on the rear side of the movable cover (8) near the limit block (92), and the limit block (92) is plugged into the inner wall of the slot (94).

8. The lignin solution acid precipitation equipment according to claim 6, characterized in that: A pull ring is provided on the inner wall of the front side of the pull rod (91).

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