A hydrolysate neutralization and sedimentation device for xylose production

Abstract

This utility model relates to the field of xylose production technology and discloses a neutralization and sedimentation device for hydrolysate in xylose production. It includes a neutralization tank, a feeding tank fixedly mounted on top of the neutralization tank, and a feeding port at the bottom of the feeding tank. A feeding pipe is rotatably installed inside the neutralization tank, extending out of the tank and rotatably connected to the feeding port. A circular plate is rotatably installed inside the feeding tank, with a connecting hole on the plate. The connecting hole is offset from the central axis of the circular plate, and the feeding port is located on the circumference of the connecting hole. A motor is fixedly mounted on the top of the neutralization tank, with its output shaft vertically upwards, penetrating the feeding tank and rotatably connected to the bottom. The feeding pipe is driven by the motor's output shaft through a first transmission assembly. The circular plate is driven by the motor's output shaft through a second transmission assembly. The connecting hole on the circular plate of this utility model can intermittently connect to the feeding port, allowing for multiple small-batch feedings, facilitating control of the feeding amount, resulting in uniform mixing, complete reaction, and improved neutralization quality.

Description

Technical Field

[0001] This utility model relates to the field of xylose production technology, and in particular to a hydrolysate neutralization and sedimentation device for xylose production. Background Technology

[0002] With increasing global focus on sustainable development and comprehensive resource utilization, the efficient conversion of biomass resources has become a research hotspot. Hemicellulose, as an important component of biomass, is an abundant renewable resource, and its hydrolysis product, xylose, has broad application prospects in fields such as food, medicine, and chemicals.

[0003] The device for neutralizing and settling hydrolysate in xylose production, disclosed in announcement number CN219540307U, includes a neutralization tank. A liquid injection port is located on one side of the upper part of the neutralization tank. A motor and a feeding port are also located on the upper part of the neutralization tank. The output end of the motor has a rotating shaft that extends into the inner cavity of the neutralization tank. Stirring blades for stirring the neutralized liquid are located on the shaft body. A guide pipe is located in the upper part of the inner cavity of the neutralization tank. One end of the guide pipe is connected to the feeding port, and the other end of the guide pipe has a nozzle for uniformly spraying additives. The lower part of the inner cavity of the neutralization tank is a settling chamber with an inverted conical structure. Below the settling chamber is a collection chamber with an inverted conical structure for the centralized collection of calcium sulfate crystals. A drain port for discharging the neutralized liquid is located on the side wall of the collection chamber, and a slag discharge port for cleaning the calcium sulfate crystals is located at the bottom of the collection chamber.

[0004] Based on the above technical features, the problem is that in the existing technology, when adding reactants into the neutralization tank through the guide pipe, it is difficult to control the amount added, which can easily lead to uneven mixing, insufficient reaction, and decreased neutralization quality, thereby reducing hydrolysis efficiency and quality.

[0005] Therefore, it is necessary to solve the above problems by means of a hydrolysate neutralization and sedimentation device for xylose production. Utility Model Content

[0006] The purpose of this invention is to provide a hydrolysate neutralization and sedimentation device for xylose production, in order to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a hydrolysate neutralization and sedimentation device for xylose production, comprising a neutralization tank, a feeding tank fixedly disposed on the top of the neutralization tank, and a feeding port opened at the bottom of the feeding tank; A feeding pipe is rotatably installed inside the neutralization tank, and the feeding pipe extends out of the neutralization tank and is rotatably connected to the feeding port at the bottom of the feeding tank; A horizontal circular plate is rotatably installed inside the feeding tank, and a connecting hole is provided on the circular plate; the connecting hole is offset from the central axis of the circular plate, and the feeding port is located on the circumference of the connecting hole; A motor is fixedly installed on the top of the neutralization tank, and the output shaft of the motor is vertically inserted into the feeding tank and rotatably connected to the bottom of the feeding tank. A first transmission assembly is provided between the feeding tube and the output shaft of the motor, and the feeding tube is driven by the first transmission assembly to engage with the output shaft of the motor. A second transmission assembly is provided between the circular plate and the output shaft of the motor, and the circular plate is driven to cooperate with the output shaft of the motor through the second transmission assembly.

[0008] Preferably, the second transmission component includes an incomplete gear and an external gear ring; the external gear ring is fixedly sleeved on a circular plate; the incomplete gear is fixedly sleeved on the output shaft of the motor, and the incomplete gear meshes with the external gear ring.

[0009] Preferably, the second transmission assembly includes a turntable and a rotating plate; the turntable is fixedly sleeved on the output shaft of the motor, and a vertically placed eccentric shaft is fixedly installed on the top of the turntable; a rotating shaft is coaxially fixedly installed at the bottom of the circular plate, and the rotating shaft is rotatably connected to the feeding tank; the rotating shaft passes through the middle of the rotating plate and is fixedly connected to the rotating plate; the rotating plate has multiple transmission grooves opened radially along the rotating shaft, and the multiple transmission grooves are evenly distributed circumferentially along the rotating shaft; each transmission groove passes through the rotating plate axially along the rotating shaft, and each transmission groove has a notch at its end away from the rotating shaft for the eccentric shaft to pass through; the eccentric shaft slides in fit with the transmission groove, and the eccentric shaft abuts against the rotating plate in a transmission fit.

[0010] Preferably, the first transmission component includes a first gear and a second gear; the first gear is fixedly sleeved on the output shaft of the motor, and the second gear is fixedly sleeved on the feeding tube; the first gear and the second gear are meshed together.

[0011] Preferably, the tops of both the neutralization tank and the feeding tank are fixedly and connected to a feed pipe for feeding materials.

[0012] Preferably, the bottom of the neutralization tank is fixedly and connected to a sedimentation tube for sedimentation; a first control valve is installed at the top opening of the sedimentation tube, and a cap is installed at the bottom opening of the sedimentation tube.

[0013] Preferably, a discharge pipe is fixedly and connected to the sedimentation pipe; the discharge pipe is located between the first control valve and the pipe cap, and a second control valve is installed inside the discharge pipe.

[0014] Preferably, a coaxial vertical stirring shaft is placed inside the neutralization tank, and the stirring shaft is coaxially and fixedly connected to the feeding pipe; a spiral stirring blade is fixedly arranged circumferentially on the stirring shaft; a crossbar is fixedly arranged radially on the stirring shaft, a stirring rod is fixedly arranged at the bottom of the crossbar, and a scraper is fixedly arranged at the end of the crossbar away from the stirring shaft, which slides in contact with the inner wall of the neutralization tank.

[0015] Preferably, a partition is fixedly installed inside the feeding tank, which divides the feeding tank into an upper material cavity and a lower equipment cavity; the circular plate is located inside the equipment cavity; and the partition has perforations that correspond to the upper and lower feeding ports.

[0016] The technical effects and advantages of this utility model are as follows: During the rotation of the circular plate, the connecting holes on the circular plate can intermittently connect with the feeding port, thereby allowing for multiple small feedings, which facilitates control of the feeding amount, resulting in uniform mixing, sufficient reaction, improved neutralization quality, and thus improved hydrolysis efficiency and quality. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model; Figure 2 This is a schematic diagram of the interior of the neutralization tank and the feeding tank in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the second transmission component in Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the inside of the feeding tank in Embodiment 2 of this utility model; Figure 5 This is a schematic diagram of the second transmission component in Embodiment 2 of this utility model.

[0018] In the diagram: 1. Neutralization tank; 2. Feeding tank; 3. Motor; 4. First gear; 5. Feeding pipe; 6. Second gear; 7. Incomplete gear; 8. External gear ring; 9. Connecting hole; 10. Spiral stirring blade; 11. Stirring rod; 12. Scraper; 13. Sedimentation pipe; 14. First control valve; 15. Discharge pipe; 16. Second control valve; 17. Pipe cap; 18. Turntable; 19. Eccentric shaft; 20. Rotating plate; 21. Circular plate. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] Example 1: This utility model provides the following... Figures 1 to 3 The device shown is a hydrolysate neutralization and sedimentation apparatus for xylose production, comprising a neutralization tank 1, with support legs fixedly installed at the bottom of the neutralization tank 1 for stable support. A feeding tank 2 is fixedly installed at the top of the neutralization tank 1, and a feeding port is provided at the bottom of the feeding tank 2.

[0021] A partition is fixedly installed inside the feeding tank 2, dividing the feeding tank 2 into an upper material chamber and a lower equipment chamber. Perforations are made on the partition, corresponding vertically to the feeding port, connecting the material chamber and the equipment chamber.

[0022] A feeding pipe 5 is rotatably installed inside the neutralization tank 1. Specifically, the feeding pipe 5 includes an inclined pipe and two vertical pipes. The inclined pipe is located between the two vertical pipes. One of the vertical pipes extends upward through the neutralization tank 1 and is rotatably connected to the top of the neutralization tank 1, with its top opening rotatably connected to the feeding port. The bottom opening of this vertical pipe is fixedly connected to the high-end opening of the inclined pipe via a bend. The other vertical pipe is fixedly connected to the bottom opening of the inclined pipe via another bend.

[0023] A coaxial vertical stirring shaft is placed inside the neutralization tank 1, with its top end coaxially and fixedly connected to the bottom end of a vertical pipe extending out of the neutralization tank 1. A spiral stirring blade 10 is fixedly mounted circumferentially on the stirring shaft. A horizontal bar is fixedly mounted radially on the stirring shaft, with a vertical stirring rod 11 fixedly installed at the bottom of the horizontal bar. A scraper 12, which slides in contact with the inner wall of the neutralization tank 1, is fixedly mounted at the end of the horizontal bar furthest from the stirring shaft.

[0024] A motor 3 is fixedly installed on the top of the neutralization tank 1. A first transmission assembly is set between the feeding pipe 5 and the output shaft of the motor 3. The feeding pipe 5 is driven by the output shaft of the motor 3 through the first transmission assembly.

[0025] Specifically, the first transmission assembly includes a first gear 4 and a second gear 6. The first gear 4 is fixedly mounted on the output shaft of the motor 3, and the second gear 6 is fixedly mounted on the pipe body of the feeding pipe 5 that extends out of the neutralization tank 1. The first gear 4 and the second gear 6 are meshed together.

[0026] A vertically mounted rotating shaft is installed inside the equipment cavity of the feeding tank 2. The rotating shaft is rotatably connected to the partition and the feeding tank 2. A circular plate 21 is fixedly mounted on the rotating shaft. The top end face of the circular plate 21 is in sliding contact with the bottom end face of the partition, and the bottom end face of the circular plate 21 is in sliding contact with the bottom inner wall of the feeding tank 2.

[0027] Two through-holes 9 are formed on the circular plate 21 along the vertical direction, and the two through-holes 9 are evenly distributed around the circumference of the axis of rotation. Each through-hole 9 is offset from the central axis of the circular plate 21, and the feeding port is located on the circumference of the two through-holes 9.

[0028] The output shaft of motor 3 extends vertically upwards into the feeding tank 2 and is rotatably connected to the bottom of the feeding tank 2. A second transmission assembly is provided between the circular plate 21 and the output shaft of motor 3, and the circular plate 21 is driven by the output shaft of motor 3 through the second transmission assembly.

[0029] Specifically, the second transmission assembly includes an incomplete gear 7 and an external gear ring 8. The external gear ring 8 is fixedly sleeved on the circular plate 21. The incomplete gear 7 is fixedly sleeved on the output shaft of the motor 3, and the incomplete gear 7 meshes with the external gear ring 8.

[0030] Both the top of the neutralization tank 1 and the feeding tank 2 are fixed and connected to a feed pipe for feeding.

[0031] The bottom of the neutralization tank 1 is fixedly and connected to a sedimentation pipe 13 for sedimentation. A first control valve 14 is installed at the top opening of the sedimentation pipe 13, and a pipe cap 17 is installed at the bottom opening of the sedimentation pipe 13.

[0032] A discharge pipe 15 is fixedly connected to and connected to the sedimentation pipe 13. The discharge pipe 15 is located between the first control valve 14 and the pipe cap 17, and a second control valve 16 is installed inside the discharge pipe 15. The discharge pipe 15 is an inclined pipe, and the lower end of the discharge pipe 15 is the end furthest from the sedimentation pipe 13.

[0033] Working principle of Example 1: In the initial state, the first control valve 14 closes the sedimentation pipe 13, and the second control valve 16 closes the discharge pipe 15. The xylose-containing solution after the hydrolysis reaction is added into neutralization tank 1 through the feed pipe of neutralization tank 1. After the addition is complete, an appropriate amount of alkaline solution for neutralization is added into feeding tank 2 through the feed pipe of feeding tank 2. After the addition is complete, motor 3 is started.

[0034] After motor 3 starts, the output shaft of motor 3 drives the first gear 4 to rotate, and the first gear 4 drives the second gear 6 to rotate. The second gear 6 drives the feeding pipe 5 to rotate.

[0035] At the same time, the output shaft of motor 3 drives the incomplete gear 7 to rotate. The teeth of the incomplete gear 7 intermittently mesh with the teeth of the external gear ring 8, and the external gear ring 8 rotates intermittently, driving the circular plate 21 to rotate intermittently.

[0036] When the circular plate 21 rotates, the connecting hole 9 intermittently connects with the feeding port and the through hole, thereby enabling intermittent feeding. This allows for multiple small feedings, with the same amount of material added each time.

[0037] When the feed pipe 5 rotates, it drives the stirring shaft to rotate. The stirring shaft then drives the crossbar and the spiral stirring blades 10 to rotate.

[0038] When the crossbar rotates, it drives the stirring rod 11 to stir the xylose-containing solution after the hydrolysis reaction, as well as the alkaline solution used for neutralization. At the same time, the crossbar drives the scraper 12 to scrape off the neutralization by-product crystals on the inner wall of the neutralization tank 1.

[0039] When the spiral stirring blade 10 rotates, it can stir the xylose-containing solution after the hydrolysis reaction and the alkaline solution used for neutralization, and it can also push the xylose-containing solution after the hydrolysis reaction located below to the top, thereby achieving uniform mixing.

[0040] After the neutralization reaction is complete, motor 3 is shut off. Next, the first control valve 14 opens the sedimentation tube 13. The neutralized solution flows into the sedimentation tube 13 for precipitation. After the precipitation process is complete, the second control valve 16 opens the discharge pipe 15. At this time, the neutralized xylose-containing solution flows out of the discharge pipe 15 and into the production equipment for the next production process. Once the neutralized xylose-containing solution no longer flows out of the discharge pipe 15, the pipe cap 17 is opened, and the solution containing precipitated byproducts flows out through the sedimentation tube 13.

[0041] In this embodiment, both the first control valve 14 and the second control valve 16 are existing pipeline valves. The connection between the pipe cap 17 and the sedimentation pipe 13 is also made in an existing manner.

[0042] Example 2: This utility model provides the following... Figures 4 to 5 The embodiment shown is a hydrolysate neutralization and sedimentation device for xylose production. The difference between this embodiment and Embodiment 1 is that the bottom end face of the circular plate 21 does not slide against the inner bottom wall of the feeding tank 2. The second transmission assembly includes a turntable 18 and a rotating plate 20. The turntable 18 is fixedly sleeved on the output shaft of the motor 3, and a vertically placed eccentric shaft 19 is fixedly mounted on the top of the turntable 18. The rotating shaft passes through the middle of the rotating plate 20 and is fixedly connected to it. The rotating plate 20 has multiple transmission grooves radially along the rotating shaft, and these grooves are evenly distributed circumferentially along the rotating shaft. Each transmission groove passes through the rotating plate 20 axially along the rotating shaft, and each groove has a notch at its end away from the rotating shaft for the eccentric shaft 19 to pass through. The eccentric shaft 19 slides into the transmission groove and abuts against the rotating plate 20 in a transmission engagement. The working principle of Example 2 is different from that of Example 1 in that when the output shaft of motor 3 rotates, it drives the turntable 18 to rotate, and the turntable 18 drives the eccentric shaft 19 to revolve around the output shaft of motor 3.

[0043] When the eccentric shaft 19 revolves around the output shaft of the motor 3, it first slides into the transmission groove through the notch on the circumference of the revolution. After sliding into the transmission groove, the eccentric shaft 19 pushes the rotating plate 20 to rotate a certain arc, and then slides out of the transmission groove after the rotating plate 20 has rotated a certain arc. During this process, the next transmission groove revolves onto the circumference of the eccentric shaft 19, preparing for the next rotation.

[0044] As a result, the output shaft of motor 3 rotates continuously, while the rotating plate 20 rotates intermittently.

[0045] Specifically, the transmission groove being on the circumference of the eccentric shaft 19 means that the notch of the transmission groove and the end near the rotation are both located on the circumference of the eccentric shaft 19, and the transmission groove divides the circumference of the eccentric shaft 19 into a major arc and a minor arc.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydrolysate neutralization and settling apparatus for xylose production comprising a neutralization tank (1), characterized in that: The top of the neutralization tank (1) is fixedly provided with a feeding tank (2), and the bottom of the feeding tank (2) is provided with a feeding port; The feeding pipe (5) is rotatably installed inside the neutralization tank (1). The feeding pipe (5) extends out of the neutralization tank (1) and is rotatably connected to the feeding port at the bottom of the feeding tank (2). A horizontal circular plate (21) is rotatably installed inside the feeding tank (2), and a connecting hole (9) is provided on the circular plate (21); the connecting hole (9) is offset from the central axis of the circular plate (21), and the feeding port is located on the circumference of the connecting hole (9); A motor (3) is fixedly installed on the top of the neutralization tank (1). The output shaft of the motor (3) is vertically inserted into the feeding tank (2) and rotatably connected to the bottom of the feeding tank (2). A first transmission assembly is provided between the feeding pipe (5) and the output shaft of the motor (3), and the feeding pipe (5) is driven to cooperate with the output shaft of the motor (3) through the first transmission assembly; A second transmission assembly is provided between the circular plate (21) and the output shaft of the motor (3), and the circular plate (21) is driven to cooperate with the output shaft of the motor (3) through the second transmission assembly.

2. A hydrolysate neutralization and settling device for xylose production according to claim 1, characterized in that: The second transmission assembly includes an incomplete gear (7) and an external gear ring (8); the external gear ring (8) is fixedly sleeved on the circular plate (21); the incomplete gear (7) is fixedly sleeved on the output shaft of the motor (3), and the incomplete gear (7) meshes with the external gear ring (8).

3. A hydrolysate neutralization and settling device for xylose production according to claim 1, characterized in that: The second transmission assembly includes a turntable (18) and a rotating plate (20); the turntable (18) is fixedly sleeved on the output shaft of the motor (3), and a vertically placed eccentric shaft (19) is fixedly installed on the top of the turntable (18); a rotating shaft is coaxially fixedly installed at the bottom of the circular plate (21), and the rotating shaft is rotatably connected to the feeding tank (2); the rotating shaft passes through the middle position of the rotating plate (20) and is fixedly connected to the rotating plate (20); the rotating plate (20) has multiple transmission grooves opened along the radial direction of the rotating shaft, and the multiple transmission grooves are evenly distributed along the circumference of the rotating shaft; each transmission groove passes through the rotating plate (20) along the axial direction of the rotating shaft, and each transmission groove has a notch at the end away from the rotating shaft for the eccentric shaft (19) to pass through; the eccentric shaft (19) slides with the transmission groove, and the eccentric shaft (19) abuts with the rotating plate (20) in a transmission engagement.

4. A hydrolysate neutralization and settling device for xylose production according to claim 1, characterized in that: The first transmission assembly includes a first gear (4) and a second gear (6); the first gear (4) is fixedly mounted on the output shaft of the motor (3), and the second gear (6) is fixedly mounted on the feeding pipe (5); the first gear (4) and the second gear (6) mesh with each other.

5. A hydrolysate neutralization and settling device for xylose production according to claim 1, characterized in that: The tops of both the neutralization tank (1) and the feeding tank (2) are fixed and connected with feeding pipes for feeding.

6. A hydrolysate neutralization and settling device for xylose production according to claim 1, characterized in that: The bottom of the neutralization tank (1) is fixed and connected to a sedimentation tube (13) for sedimentation; a first control valve (14) is installed at the top opening of the sedimentation tube (13), and a cap (17) is installed at the bottom opening of the sedimentation tube (13).

7. A hydrolysate neutralization and settling device for xylose production according to claim 6, characterized in that: The sedimentation tube (13) is fixed and connected to the discharge tube (15); the discharge tube (15) is located between the first control valve (14) and the pipe cap (17), and a second control valve (16) is installed inside the discharge tube (15).

8. A hydrolysate neutralization and settling device for xylose production according to claim 1, characterized in that: The neutralization tank (1) has a coaxial vertical stirring shaft inside, and the stirring shaft is coaxially and fixedly connected to the feeding pipe (5); a spiral stirring blade (10) is fixedly installed on the stirring shaft along the circumferential direction; a crossbar is fixedly installed on the stirring shaft along the radial direction, and a stirring rod (11) is fixedly installed at the bottom of the crossbar; a scraper (12) that slides in contact with the inner wall of the neutralization tank (1) is fixedly installed at the end of the crossbar away from the stirring shaft.

9. A hydrolysate neutralization and sedimentation device for xylose production according to claim 1, characterized in that: A partition is fixedly installed inside the feeding tank (2), which divides the feeding tank (2) into an upper material cavity and a lower equipment cavity; the circular plate (21) is located inside the equipment cavity; the partition has perforations that correspond to the upper and lower feeding ports.

Images