Saccharification device for straw sugar production

Abstract

The utility model relates to the technical field of enzymolysis saccharification equipment, in particular to a straw sugar production saccharification device which comprises a saccharification tank. A high-level pH meter and a low-level pH meter are arranged at the bottom of one side of the saccharifying tank, an alkali liquor inlet is correspondingly formed in the other side of the saccharifying tank, the alkali liquor inlet is connected with an alkali liquor inlet pipe, a peristaltic pump is installed on the alkali liquor inlet pipe, the high-level pH meter and the low-level pH meter are connected with an on-site PLC, and the on-site PLC is connected with the peristaltic pump; a circulating opening is formed in the bottom of the saccharifying tank on the same side as the alkali liquor inlet, the circulating opening is connected with a circulating pipe, the circulating pipe circularly conveys feed liquid in the saccharifying tank from the lower part of the tank body to the upper part of the tank body, and the circulating pipe is connected with a spraying pipe above the tank body. By means of circulation of feed liquid in the saccharifying tank and multi-point pH measurement, more accurate measurement and control of the pH of the feed liquid in the equipment can be achieved, production efficiency can be guaranteed, production cost can be reduced, and product quality can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of enzymatic hydrolysis and saccharification equipment, and particularly relates to a saccharification device for straw sugar production. Background Art

[0002] Straw sugar is a kind of edible sugar obtained by a series of processing of the remaining parts after crop harvesting; in the production process of straw sugar, cellulase is used to enzymatically hydrolyze the treated xylose residue, so as to prepare straw sugar, that is, cellulose glucose.

[0003] Since cellulase is sensitive to pH value, and the suitable pH value is between 4.7 and 5.3; therefore, during the saccharification reaction process, it is necessary to strictly control the pH value of the reaction solution to avoid the decrease of the reaction rate, the increase of production cost and the reduction of product quality caused by the inactivation of cellulase.

[0004] In the existing saccharification equipment, the pH value is often controlled at a single point. However, it is found in actual production that since the volume of the saccharification equipment is generally large, the reaction solution will be unevenly mixed inside the equipment. When the alkaline solution for regulating pH is added to the equipment, it is difficult to achieve uniform mixing instantly. This makes the pH value adjustment lag when using single-point measurement, increases the consumption of alkaline solution and seriously affects the activity of cellulase, bringing adverse effects to production; at the same time, in the saccharification equipment, due to the occurrence of enzymatic hydrolysis reaction, the pH value at the bottom of the equipment is lower than that above the equipment. Therefore, when using single-point measurement, there is also a large error, and it is difficult to ensure that the measurement can truly reflect the regulation situation of the pH value inside the equipment.

[0005] Therefore, in the process of straw sugar preparation, a saccharification equipment that can more accurately measure and regulate the pH value inside the equipment, thereby effectively ensuring the activity of cellulase and ensuring the reaction efficiency, cost and product quality, is a problem that needs to be solved currently. Content of the Utility Model

[0006] The purpose of the utility model is to provide a saccharification device for straw sugar production aiming at the above-mentioned deficiencies of the prior art, so as to achieve the purpose of accurately measuring and regulating the pH value inside the equipment during the production process.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme: a saccharification device for straw sugar production, including a saccharification tank, two pH meters are installed on the tank body of the saccharification tank, and the two pH meters are respectively a low-position pH meter below the tank body and a high-position pH meter above the tank body; a circulation pipe is arranged on the tank body of the saccharification tank, and the material in the circulation pipe circulates from below the saccharification tank to above the saccharification tank.

[0008] Further, a feed inlet, an alkali solution inlet, a temperature probe mounting port, a liquid level probe mounting port, a water inlet, and an enzyme solution inlet are provided above the saccharification tank; a circulation port is provided below the saccharification tank; a discharge port is provided at the bottom of the saccharification tank; the feed inlet is connected to a feed pipeline, the alkali solution inlet is connected to an alkali solution inlet pipe, a temperature sensor is installed through the temperature probe mounting port, a liquid level sensor is installed through the liquid level probe mounting port, the circulation port is connected to a circulation pipe, and the discharge port is connected to a discharge pipe.

[0009] Further, the high-position pH meter and the low-position pH meter are installed on the same side of the saccharification tank body, the alkali solution inlet is provided on the saccharification tank body on the other side corresponding to the high-position pH meter and the low-position pH meter, and the circulation port is provided below the saccharification tank body on the same side as the alkali solution inlet.

[0010] Further, a jacket is provided at the lower part of the saccharification tank body, a steam inlet is provided below the jacket, a steam outlet is provided above the jacket, and they are connected to a steam pipeline through the steam inlet and the steam outlet.

[0011] Further, a stirring motor is installed above the saccharification tank body, and the stirring motor is connected to a stirring paddle.

[0012] Further, the circulation pipe extends to the upper part inside the saccharification tank body and is connected to a spray pipe. The spray pipe is circular, the stirring paddle passes through the spray pipe, and spray heads are uniformly installed below the spray pipe.

[0013] Further, a peristaltic pump is provided on the alkali solution inlet pipe, and the peristaltic pump is electrically connected to the high-position pH meter and the low-position pH meter.

[0014] The beneficial effects of the present utility model are as follows: on the one hand, by circulating the liquid in the saccharification tank, the uniform mixing of the liquid in the equipment can be effectively promoted; on the other hand, through the measurement of multiple points of pH, the measurement error can be effectively reduced; thus, more accurate measurement and control of the pH of the liquid in the equipment can be achieved, which helps to ensure production efficiency, reduce production costs, and ensure product quality, bringing convenience to actual production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the structure of the saccharification tank of the present utility model;

[0017] Figure 3 is a top view schematic diagram of the layout of the spray pipe of the present utility model;

[0018] Figure 4It is a schematic diagram of the pipe orifice arrangement above the saccharification tank of the present utility model;

[0019] Figure 5 It is the present utility model Figure 1 The schematic cross-sectional view of plane A-A in it.

[0020] The names corresponding to each mark in the figure:

[0021] 1. Saccharification tank; 11. Jacket; 111. Steam inlet; 112. Steam outlet; 12. Feed inlet; 13. Water inlet; 14. Enzyme solution inlet; 15. Alkaline solution inlet; 16. Circulation port; 17. Discharge outlet; 18. Temperature probe installation port; 19. Liquid level probe installation port; 2. Feed pipeline; 3. Water inlet pipe; 31. Control valve A; 4. Enzyme solution inlet pipe; 41. Control valve B; 5. Alkaline solution inlet pipe; 51. Peristaltic pump; 6. Circulation pipe; 61. Circulation pump; 62. Control valve C; 63. Spray pipe; 64. Spray head; 7. Discharge pipe; 71. Discharge pump; 72. Control valve D; 8. Stirring motor; 81. Stirring paddle; 9. pH meter; 91. High-position pH meter; 92. Low-position pH meter; 10. Steam pipeline; 101. Control valve E. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present utility model.

[0023] Embodiments of the present utility model:

[0024] As Figures 1-5 shown, in the saccharification device of this embodiment, a saccharification tank 1 is provided. A jacket 11 is provided below the saccharification tank 1. A steam inlet 111 is provided at the bottom of the jacket 11. A steam outlet 112 is provided above the jacket 11. It is connected to the steam pipeline 10 through the steam inlet 111 and the steam outlet 112. A control valve E 101 is installed on the steam pipeline 10.

[0025] A stirring motor 8 is installed above the saccharification tank 1. The stirring motor 8 is connected to the stirring paddle 81 in the tank body.

[0026] A feed port 12, an alkali solution inlet 15, a temperature probe installation port 18 and a liquid level probe installation port 19 are arranged above the saccharification tank 1; the feed port 12 is connected to the feed pipe 2, the alkali solution inlet 15 is connected to the alkali solution inlet pipe 5, a peristaltic pump 51 is installed on the alkali solution inlet pipe 5, and the alkali solution inlet pipe 5 is connected to the alkali solution storage tank; a temperature sensor is installed through the temperature probe installation port 18, and a liquid level sensor is installed through the liquid level probe installation port 19, wherein the liquid level sensor may be an ultrasonic liquid level sensor.

[0027] A water inlet 13 and an enzyme solution inlet 14 are provided above one side of the saccharification tank 1. The water inlet 13 is connected to the water inlet pipe 3, on which a control valve A31 is installed; the enzyme solution inlet 14 is connected to the enzyme solution inlet pipe 4, on which a control valve B41 is installed.

[0028] A discharge port 17 is provided at the bottom of the saccharification tank 1 , and the discharge port 17 is connected to a discharge pipe 7 , on which a discharge pump 71 and a control valve D72 are installed.

[0029] A pH meter 9 is installed on the side of the saccharification tank 1 away from the alkali solution inlet 15. There are two pH meters 9, namely a high-level pH meter 91 and a low-level pH meter 92. A circulation port 16 is provided at the bottom of the saccharification tank 1 on the same side as the alkali solution inlet 15 and is connected to a circulation pipe 6. A circulation pump 61 and a control valve C62 are provided on the circulation pipe 6. The circulation pipe 6 is connected to a spray pipe 63. The spray pipe 63 is in a circular shape. A stirring paddle 81 extends downward from the center of the spray pipe 63. Spray heads 64 are evenly installed below the spray pipe 63.

[0030] The principle of this utility model is:

[0031] When the utility model is in use, materials are added to the saccharification tank 1 through the feed port 12, wherein the materials are xylose residues after straw processing, and the materials can be fed through a screw conveyor or the like during the process. After the materials are added to the saccharification tank 1, a proper amount of water is added through the water inlet pipe 3 and stirred evenly. At this time, the interior of the saccharification tank 1 is controlled to be at a suitable temperature through the steam inlet pipe, and alkali solution is added through the alkali solution inlet pipe 5 to control the interior of the saccharification tank 1 to be at a suitable pH, and the pH is controlled at 4.7-5.3 during the process.

[0032] At this time, cellulase solution is added to the saccharification tank 1 through the enzyme solution inlet pipe 4 and the circulation pump 61 is started. Therefore, during the entire enzymatic hydrolysis process, the average value of the high-level pH meter 91 and the low-level pH meter 92 is taken as an indicator for controlling the pH value in the saccharification tank. Through dual-point pH measurement and control, the error of single-point measurement caused by the pH difference caused by the uneven distribution of the liquid in the saccharification tank 1 can be effectively avoided, making the pH control process more accurate and stable, thereby effectively ensuring the activity of the enzyme and ensuring the efficient and stable progress of the enzymatic hydrolysis reaction.

[0033] In addition, the utility model also circulates the feed liquid by means of a circulation pump 61. During the process, the feed liquid circulates from the bottom to above the saccharification tank 1 and sprays downwards. During the process, it is more conducive to keeping the feed liquid in the saccharification tank 1 homogeneous, thereby playing a promoting role in the accurate control of pH. After the reaction is completed, the feed liquid can be discharged from the bottom discharge port 17.

Claims

1. A saccharification device for producing straw sugar, comprising a saccharification tank (1), characterized in that: Two pH meters (9) are installed on the tank body of the saccharification tank (1), and the two pH meters (9) are respectively a low-position pH meter (92) below the tank body and a high-position pH meter (91) above the tank body; a circulation pipe (6) is arranged on the tank body of the saccharification tank (1), and the material in the circulation pipe (6) circulates from the bottom of the saccharification tank (1) to the top of the saccharification tank (1).

2. A straw sugar production saccharification device according to claim 1, characterized in that: The saccharification tank (1) is provided with a feed port (12), an alkali solution inlet (15), a temperature probe installation port (18), a liquid level probe installation port (19), a water inlet (13) and an enzyme solution inlet (14) at the top; a circulation port (16) is provided at the bottom of the saccharification tank (1); and a discharge port (17) is provided at the bottom of the saccharification tank (1); the feed port (12) is connected to a feed pipe (2), the alkali solution inlet (15) is connected to an alkali solution inlet pipe (5), a temperature sensor is installed through the temperature probe installation port (18), a liquid level sensor is installed through the liquid level probe installation port (19), the circulation port (16) is connected to a circulation pipe (6), and the discharge port (17) is connected to a discharge pipe (7).

3. A straw sugar production saccharification device according to claim 2, characterized in that: The high-level pH meter (91) and the low-level pH meter (92) are installed on the same side of the saccharification tank (1) body, the alkali solution inlet (15) is arranged on the saccharification tank (1) body on the other side corresponding to the high-level pH meter (91) and the low-level pH meter (92), and the circulation port (16) is arranged below the saccharification tank (1) body on the same side as the alkali solution inlet (15).

4. A straw sugar production saccharification device according to claim 2, characterized in that: The saccharification tank (1) is provided with a jacket (11) at the lower part of the tank body, a steam inlet (111) is provided below the jacket (11), and a steam outlet (112) is provided above the jacket (11), and is connected to a steam pipeline (10) via the steam inlet (111) and the steam outlet (112).

5. A straw sugar production saccharification device according to claim 2, characterized in that: A stirring motor (8) is installed above the saccharification tank (1) and the stirring motor (8) is connected to a stirring paddle (81).

6. A straw sugar production saccharification device according to claim 5, characterized in that: The circulation pipe (6) extends to the upper part of the saccharification tank (1) and is connected to the spray pipe (63). The spray pipe (63) is in a circular shape. The stirring paddle (81) is arranged through the spray pipe (63). Spray heads (64) are evenly installed below the spray pipe (63).

7. The straw sugar production saccharification device according to claim 2, characterized in that: The alkali solution inlet pipe (5) is provided with a peristaltic pump (51), and the peristaltic pump (51) is electrically connected to a high-level pH meter (91) and a low-level pH meter (92).

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