Device and method for extracting xylose from corncob by enzyme method

Abstract

The invention discloses a device and method for extracting xylose from corncobs through an enzyme method, and belongs to the field of reaction kettles. The inner center of the reaction kettle is fixedly connected with a cylinder, the top of the reaction kettle is provided with a cover buckled at the upper end of the reaction kettle, the bottom of the reaction kettle is provided with a through hole communicated with the cylinder, and the through hole is in threaded connection with a bottom cover; a through hole is formed in the bottom of the cylinder, and a screen is fixedly connected to the inner wall of the through hole; a piston in sliding fit with the cylinder is arranged in the cylinder, the upper end of the piston is fixedly connected with the free end of an air cylinder, and the fixed end of the air cylinder is fixedly connected to the cover. A liquid inlet is formed in the side surface of the reaction kettle, a liquid discharge hole is formed in the bottom of the reaction kettle, and valves are arranged on the liquid inlet and the liquid discharge hole. The piston moves upwards to drive the treatment liquid to repeatedly wash the raw materials, and when the piston moves downwards to the lowest point, the raw materials can be extruded, part of the treatment liquid in the raw materials can be extruded out, and the situation that the material pretreatment rate is reduced due to the fact that the treatment liquid is difficult to separate out after being dissolved into the raw materials is avoided.

Description

Technical Field

[0001] This invention relates to an apparatus and method for enzymatic extraction of xylose from corn cobs, belonging to the field of reaction vessels. Background Technology

[0002] When extracting xylose from corn cobs, the corn cobs are usually crushed first and then put into a reaction vessel for pretreatment with dilute acid, hot water, and steam to soften the lignocellulose structure and dissolve some of the hemicellulose.

[0003] During the pretreatment process, the solution in the reactor needs to be in full contact with the raw materials. Although some reactors on the market now have stirring functions, most of them stir in one direction. Moreover, after the pretreatment is completed, it is necessary to separate the liquid from the solid residue. However, the reactors on the market are more troublesome to clean the solid residue, so improvements have been made. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned problems existing in the background art by providing an apparatus and method for enzymatic extraction of xylose from corn cobs.

[0005] The present invention achieves the above objectives by adopting the following technical solution:

[0006] An apparatus for enzymatic extraction of xylose from corn cobs includes a reaction vessel; a cylinder is fixedly connected to the center of the interior of the reaction vessel; a cover is fastened to the top of the reaction vessel; a through hole communicating with the cylinder is provided at the bottom of the reaction vessel, and a bottom cover is threadedly connected to the through hole; a perforation is provided at the bottom of the cylinder, and a screen is fixedly connected to the inner wall of the perforation; a piston is provided inside the cylinder and slides therewith, the upper end of the piston is fixedly connected to the free end of a cylinder, and the fixed end of the cylinder is fixedly connected to the cover; a liquid inlet is provided on the side of the reaction vessel, and a liquid outlet is provided at the bottom of the reaction vessel; both the liquid inlet and the liquid outlet are equipped with valves.

[0007] A method of using an apparatus for enzymatic extraction of xylose from corn cobs, the method comprising the following steps:

[0008] Step 1: Add the material into the cylinder and install the bottom cover;

[0009] Step 2: Introduce the treatment liquid into the gap between the reactor and the cylinder through the inlet;

[0010] Step 3: Activate the cylinder to move the piston up and down, allowing the treatment liquid to contact or separate from the material. Compared with the prior art, the beneficial effects of this invention are: this invention not only allows the treatment liquid to repeatedly flush the raw material by moving the piston upward, but also squeezes the raw material when the piston moves downward to its lowest point, squeezing out some of the treatment liquid from the raw material. This avoids the treatment liquid dissolving inside the raw material and being difficult to precipitate, thus preventing a decrease in the material pretreatment rate. Attached Figure Description

[0011] Figure 1 This is a front sectional view of an apparatus for enzymatic extraction of xylose from corn cobs according to the present invention;

[0012] Figure 2 This is a front sectional view of the reaction vessel of an apparatus for enzymatic extraction of xylose from corn cobs according to the present invention;

[0013] Figure 3 This is a schematic diagram of the structure of the lid of the apparatus for enzymatic extraction of xylose from corn cobs according to the present invention;

[0014] Figure 4 This is a schematic diagram of the spiral plate structure of an apparatus for enzymatic extraction of xylose from corn cobs according to the present invention;

[0015] Figure 5 This is a schematic diagram of the structure of the apparatus for enzymatic extraction of xylose from corn cobs according to the present invention, with the piston at the lowest point;

[0016] Figure 6 This is a schematic diagram of the structure of the apparatus for enzymatic extraction of xylose from corn cobs according to the present invention, with the piston at the highest point. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] Specific implementation method one: as follows Figure 1-6As shown, this embodiment describes an apparatus for enzymatic extraction of xylose from corn cobs, including a reaction vessel 1. A cylinder 8 is fixedly connected to the center of the interior of the reaction vessel 1. A cover 4 is fastened to the top of the reaction vessel 1, and a through hole 11 communicating with the cylinder 8 is provided at the bottom of the reaction vessel 1. A bottom cover 7 is threadedly connected to the through hole 11. A perforation 81 is provided at the bottom of the cylinder 8, and a screen 82 is fixedly connected to the inner wall of the perforation 81. A piston 84 is provided inside the cylinder 8, slidingly engaging with it. The upper end of the piston 84 is fixedly connected to the free end of a cylinder 83, and the fixed end of the cylinder 83 is fixedly connected to the cover 4. A liquid inlet 5 is provided on the side of the reaction vessel 1, and a liquid outlet 9 is provided at the bottom of the reaction vessel 1. Valves 6 are provided on both the liquid inlet 5 and the liquid outlet 9. An electric heating wire 2 is mounted on the outer wall of the reaction vessel 1 for heating.

[0019] The cylinder 8 contains the raw material 10 located at the lower end of the piston 84.

[0020] The top end of the cylinder 8 contacts the bottom surface of the cover 4, and a sealing strip is fixedly connected to the top end of the cylinder 8. This prevents gas from leaking out through the gap between the cylinder 8 and the cover 4.

[0021] The top side of the cylinder 8 is provided with a pipe 85 that connects the inside and outside of the cylinder 8, and a one-way valve I 86 is installed on the pipe 85.

[0022] The cover 4 is provided with a U-shaped tube 41, one end of which is connected to the interior of the cylinder 8, and the other end of which is located at the bottom of the gap between the reactor 1 and the cylinder 8; the U-shaped tube 41 is provided with a one-way valve II 42. The direction of gas flow is controlled by one-way valve I 86 and one-way valve II 42.

[0023] The U-shaped tube 41 is also fixedly connected to a diffuser 43 at one end of the gap between the reactor 1 and the cylinder 8. The diffuser 43 refines the air into small bubbles, so that when the small bubbles move along the direction of the spiral plate 3, they can cover a larger area, thereby allowing the treatment liquid 101 in a larger area to be affected by the bubbles.

[0024] A spiral plate 3 is fixedly connected to the inner wall of the reactor 1, located in the gap between the reactor 1 and the cylinder 8; the U-shaped tube 41 passes through the spiral plate 3. The spiral plate 3 affects the flow direction of air bubbles and the treatment liquid 101 discharged from the perforation 81, thereby affecting the flow direction or air bubbles of the treatment liquid in the gap between the reactor 1 and the cylinder 8, and enhancing the mixing effect of the treatment liquid 101.

[0025] The spiral plate 3 is provided with multiple ventilation holes 31, allowing the bubbles to move in multiple directions.

[0026] When the piston 84 moves upward, check valve I 86 closes and check valve I 42 opens.

[0027] A method of using an apparatus for enzymatic extraction of xylose from corn cobs, the method comprising the following steps:

[0028] Step 1: Add material 10 into cylinder 8 and install bottom cover 7;

[0029] Step 2: Introduce treatment liquid 101 into the gap between reactor 1 and cylinder 8 through inlet 5;

[0030] Step 3: Start cylinder 83, which drives piston 84 to move up and down, so that the treatment liquid 101 comes into contact with or separates from the material 10.

[0031] The working principle of this invention is as follows: material 10 is added into cylinder 8, and bottom cover 7 is installed by thread;

[0032] Treatment liquid 101 is introduced into the gap between reactor 1 and cylinder 8 through inlet 5;

[0033] Start cylinder 83, which drives piston 84 to move up and down, so that the processing liquid 101 comes into contact with or separates from the material 10.

[0034] like Figure 5 As shown, when cylinder 83 moves upward, it drives piston 84 to move upward. Piston 84 pushes the gas at its upper end to be discharged through U-shaped tube 41 to the bottom of the gap between reactor 1 and cylinder 8, and is refined into small bubbles by refiner 43. Under the action of buoyancy, the bubbles move upward and eventually reach the upper end of the treatment liquid 101. At the same time as piston 84 moves upward, the space below piston 84 increases and the pressure decreases. Part of the treatment liquid 101 in the gap between reactor 1 and cylinder 8 passes through screen 82 and enters the interior of cylinder 8, and mixes with raw material 10 to pre-treat raw material 10.

[0035] When cylinder 83 moves downward, it drives piston 84 to move downward. Piston 84 pushes the treatment liquid 101 at its lower end to flow through screen 82 into the gap between reactor 1 and cylinder 8. When piston 84 moves to the lowest point, piston 84 will squeeze raw material 10, causing some of the treatment liquid 101 dissolved in raw material 10 to be discharged. This is so that when raw material 10 is mixed with treatment liquid 101 again, new treatment liquid 101 can be dissolved into raw material 10. This avoids the treatment liquid 101 being difficult to precipitate after dissolving in raw material 10, which would prevent subsequent treatment liquid 101 from dissolving into raw material 10 and reduce pretreatment efficiency. After the processing liquid 101 discharged from the perforation 81 enters the gap between the reactor 1 and the cylinder 8, it will flow along the direction of the spiral plate 3 after being pressed by the piston 84 through the perforation 81. This will cause the remaining processing liquid 101 in the gap between the reactor 1 and the cylinder 8 to flow together, so that the processing liquid 101 that has left the cylinder 8 can be quickly mixed with the remaining processing liquid 101 in the gap between the reactor 1 and the cylinder 8. This will prevent the uneven concentration of the processing liquid 101 in the gap between the reactor 1 and the cylinder 8 from reducing the efficiency of pretreatment of the raw material 10 after entering the cylinder 8.

[0036] As the treatment liquid 101 flows along the direction of the spiral plate 3, some of the treatment liquid 101 will flow vertically through the vent hole 31, further enhancing the mixing effect and making the temperature more uniform.

[0037] As piston 84 moves downward, the space at the top of piston 84 increases, allowing the gas at the top of the gap between reactor 1 and cylinder 8 to pass through pipe 85, through one-way valve I 86, and move back to the top of piston 84 inside cylinder 8, so as to repeat the above steps.

[0038] As piston 84 moves upward again, the gas at the top of piston 84 is discharged from the refiner 43 again. During the upward movement of the small bubbles, some bubbles travel along the direction of the spiral plate 3, while others move through the vent 31. As the bubbles rise, unstable vortices and turbulent zones are generated at their tails. These tiny vortices break up larger vortices in the liquid and increase the relative motion between fluid micro-clusters, thereby further enhancing the mixing effect of the treated liquid 101.

[0039] After pretreatment, the drain hole 9 is opened to discharge the treated liquid 101. Then, cylinder 83 is restarted, driving piston 84 to move downward, squeezing material 10 and expelling the treated liquid 101 adsorbed within material 10. After piston 84 moves upward, air in the gap between reactor 1 and cylinder 8 is drawn into cylinder 8 through perforation 81. Piston 84 is moved downward again, and air in cylinder 8 flows from the gaps between raw materials 10 or the pores inside raw materials 10, thus pushing out some of the remaining treated liquid 101 in the gaps between raw materials 10 or the pores inside raw materials 10. This process is repeated several times before cylinder 83 is closed. Then, bottom cover 7 is opened, and piston 84 pushes all the remaining raw materials 10 on the inner wall of cylinder 8 to a position close to through hole 11 for easy cleaning by staff.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An apparatus for enzymatic extraction of xylose from corn cobs, characterized in that: The reactor includes a reactor (1); a cylinder (8) is fixedly connected to the center of the reactor (1); a cover (4) is fastened to the top of the reactor (1); a through hole (11) communicating with the cylinder (8) is provided at the bottom of the reactor (1); a bottom cover (7) is connected to the through hole (11) by a thread; a perforation (81) is provided at the bottom of the cylinder (8); a screen (82) is fixedly connected to the inner wall of the perforation (81); a piston (84) is provided inside the cylinder (8) and slides with it; the upper end of the piston (84) is fixedly connected to the free end of the cylinder (83); the fixed end of the cylinder (83) is fixedly connected to the cover (4); a liquid inlet (5) is provided on the side of the reactor (1); a drain hole (9) is provided at the bottom of the reactor (1); and valves (6) are provided on both the liquid inlet (5) and the drain hole (9).

2. The apparatus for enzymatic extraction of xylose from corn cobs according to claim 1, characterized in that: The cylinder (8) contains raw material (10) located at the lower end of the piston (84).

3. The apparatus for enzymatic extraction of xylose from corn cobs according to claim 1, characterized in that: The top of the cylinder (8) is in contact with the bottom surface of the cover (4), and a sealing strip is fixedly connected to the top of the cylinder (8).

4. The apparatus for enzymatic extraction of xylose from corn cobs according to claim 2 or 3, characterized in that: The top side of the cylinder (8) is provided with a pipe (85) that connects the inside and outside of the cylinder (8), and a one-way valve I (86) is installed on the pipe (85).

5. The apparatus for enzymatic extraction of xylose from corn cobs according to claim 4, characterized in that: The cover (4) is provided with a U-shaped tube (41), one end of which is connected to the inside of the cylinder (8), and the other end of which is located at the bottom of the gap between the reactor (1) and the cylinder (8); the U-shaped tube (41) is provided with a one-way valve II (42).

6. The apparatus for enzymatic extraction of xylose from corn cobs according to claim 5, characterized in that: The U-shaped tube (41) is located at one end of the gap between the reactor (1) and the cylinder (8) and a finer atomizer (43) is also fixedly connected.

7. The apparatus for enzymatic extraction of xylose from corn cobs according to claim 6, characterized in that: A spiral plate (3) is fixedly connected to the inner wall of the reactor (1) in the gap between the reactor (1) and the cylinder (8); the U-shaped tube (41) passes through the spiral plate (3).

8. The apparatus for enzymatic extraction of xylose from corn cobs according to claim 7, characterized in that: The spiral plate (3) is provided with multiple ventilation holes (31).

9. The apparatus for enzymatic extraction of xylose from corn cobs according to claim 8, characterized in that: When the piston (84) moves upward, check valve I (86) closes and check valve I (42) opens.

10. The method of using the apparatus for enzymatic extraction of xylose from corn cobs according to claim 9, characterized in that: The method of use includes the following steps: Step 1: Add the material (10) into the cylinder (8) and install the bottom cover (7); Step 2: Introduce the treatment liquid (101) into the gap between the reactor (1) and the cylinder (8) through the liquid inlet (5); Step 3: Start the cylinder (83) to drive the piston (84) to move up and down, so that the treatment liquid (101) comes into contact with or separates from the material (10).

Images