Steam explosion device for processing rice straw pulping

Abstract

The utility model relates to the field of paper pulp processing, and discloses a steam explosion device for processing rice straw pulping, which comprises a tank body and a tank cover hermetically fixed at the upper part of the tank body, the tank cover is connected with a feed pipe, a feed valve is arranged on the feed pipe, the bottom of the tank body is connected with a discharge pipe, and a discharge valve is arranged on the discharge pipe; a double-layer pipe is fixed in the middle of the tank cover, and a plurality of air outlets are formed in the bottom of the double-layer pipe; a rotating shaft is sleeved with the double-layer pipe, the upper end of the rotating shaft is connected with a motor driving the rotating shaft to rotate, the motor is fixed to the tank cover, a stirring part is fixed to the lower extending end, penetrating through the double-layer pipe, of the rotating shaft, and the air outlet hole faces the stirring part. Uniform contact between steam and rice straw is achieved, it is guaranteed that materials are heated evenly, the fiber separation effect is improved, and the quality and efficiency of rice straw pulping are improved.

Description

Technical Field

[0001] This utility model relates to the field of pulp processing, and in particular to a steam explosion device for processing rice straw into pulp, which is suitable for straw resource utilization and pulp production scenarios. Background Technology

[0002] Steam explosion technology plays a crucial role in straw pulping. Its core lies in using high-intensity explosion to disrupt the dense structure of plant fibers, achieving lignin separation, hemicellulose decomposition, and cellulose softening. Stable and uniform steam flow is paramount in this process; only by ensuring the steam can circulate normally within the material can the steam explosion treatment achieve accurate and effective results.

[0003] However, current traditional rice straw processing devices have significant drawbacks. On the one hand, material tends to accumulate inside the device, making it difficult for steam to evenly contact all materials. On the other hand, the method of steam intake from the side of the tank results in significant uneven heating of the material, leading to poor fiber separation and failing to meet the requirements for high-quality rice straw pulping, severely impacting pulping efficiency and quality. Therefore, there is an urgent need for a new type of steam explosion device that can effectively solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a steam explosion device for processing rice straw into pulp, which achieves uniform contact between steam and rice straw, ensures uniform heating of the material, improves fiber separation effect, and enhances the quality and efficiency of rice straw pulping.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A steam explosion device for processing rice straw into pulp includes a tank body and a tank cover sealed and fixed to the upper part of the tank body. The tank cover is connected to a feed pipe with a feed valve. The bottom of the tank body is connected to a discharge pipe with a discharge valve. A double-layered pipe is fixed in the middle of the tank cover, and multiple air vents are opened at the bottom of the double-layered pipe. A rotating shaft is sleeved inside the double-layered pipe. The upper end of the rotating shaft is connected to a motor that drives it to rotate. The motor is fixed to the tank cover. A stirring part is fixed to the lower end of the rotating shaft that passes through the double-layered pipe, and the air vents face the stirring part.

[0007] Preferably, the double-layer tube includes an outer tube body, an inner tube body, and a connecting plate connecting the lower part of the outer tube body and the inner tube body, and the air outlet is formed on the connecting plate.

[0008] The upper parts of the outer tube and the inner tube are fixed to the can lid;

[0009] The outer tube is connected to an air inlet pipe, which extends out of the tank body.

[0010] Preferably, a first sealing ring is provided between the rotating shaft and the inner tube.

[0011] Preferably, a second sealing ring is provided between the outer tube and the inner tube, and the second sealing ring is located above the air intake pipe.

[0012] Preferably, the lower part of the outer tube is fixedly connected to the tank body by multiple support rods.

[0013] Preferably, the stirring part includes a spiral plate, and the two ends of the spiral plate are fixedly connected to the rotating shaft by an upper rod and a lower rod, respectively.

[0014] Preferably, the number of spiral plates is two or more, and the two or more spiral plates are evenly distributed around the circumference of the rotation axis. The spiral plates can turn the straw inside the tank up and down while completing normal mixing, which can further improve the mixing effect and prevent the problem of material accumulation at the bottom of the tank.

[0015] The outstanding effect of this utility model is:

[0016] Compared to existing technologies, this method achieves uniform stirring and steam contact: Multiple circumferentially distributed spiral plates serve as the stirring section, simultaneously stirring the straw within the tank and allowing for top-to-bottom material turnover. This effectively prevents material accumulation at the bottom of the tank, ensuring uniform straw distribution. Simultaneously, steam flows out from the bottom vent of the double-layered pipe in the center of the tank lid, facing the stirring section. Under the action of the stirring section, the steam and straw achieve full and uniform contact, solving the problems of material accumulation and uneven steam flow in traditional devices, thus guaranteeing uniform heating of the material.

[0017] Improved fiber separation effect: Due to the uniform contact and heating between steam and straw, plant fibers can react more fully during the steam explosion process, effectively destroying the dense structure of fibers, realizing lignin separation, hemicellulose decomposition and cellulose softening, significantly improving the fiber separation effect, and thus improving the quality of rice straw pulping.

[0018] Excellent sealing and stability: The dual sealing design of the first and second sealing rings improves the sealing performance of the device and ensures pressure holding effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 for Figure 1 A magnified view of a specific area (A);

[0021] Figure 3 for Figure 2 A sectional view of BB;

[0022] Figure 4 for Figure 1 Sectional view of CC.

[0023] Attached reference numerals: 10. Tank body; 11. Inlet pipe; 12. Outlet pipe;

[0024] 20. Can lid;

[0025] 30. Double-layer tube; 31. Air outlet; 32. Rotating shaft; 33. Motor; 34. Stirring section; 35. Air inlet pipe; 36. First sealing ring; 37. Second sealing ring; 38. Support rod;

[0026] 301. Outer tube; 302. Inner tube; 303. Connecting plate;

[0027] 341. Spiral plate; 342. Upper rod; 343. Lower rod. Detailed Implementation

[0028] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0029] The following is for reference Figures 1 to 4 The present invention will be described as follows:

[0030] A steam explosion device for processing rice straw into pulp, such as Figure 1 , Figure 3 As shown, the device includes a tank body 10 and a tank cover 20 sealed and fixed to the upper part of the tank body 10. The tank cover 20 is connected to a feed pipe 11, which is equipped with a feed valve. The bottom of the tank body 10 is connected to a discharge pipe 12, which is equipped with a discharge valve. A double-layer pipe 30 is fixed in the middle of the tank cover 20, and multiple air vents 31 are opened at the bottom of the double-layer pipe 30. A rotating shaft 32 is sleeved inside the double-layer pipe 30. The upper end of the rotating shaft 32 is connected to a motor 33 that drives it to rotate. The motor 33 is fixed on the tank cover 20. A stirring part 34 is fixed to the lower extension end of the rotating shaft 32 through the double-layer pipe 30, and the air vents 31 face the stirring part 34. During operation, the chopped rice straw enters the tank through the feed pipe. After feeding is completed, the feed valve is closed. The motor drives the stirring unit to rotate through the shaft. The stirring unit stirs the straw in the tank. At the same time, steam enters the double-layer pipe and flows to the straw through the vent, so that the steam and straw can be in uniform contact, achieving the purpose of uniform heating of the straw. After steam is introduced and pressure is maintained for a period of time, the discharge valve is opened instantly, and the exploded straw flows out from the discharge pipe.

[0031] A first sealing ring 36 is provided between the rotating shaft 32 and the inner tube 302. The first sealing ring can prevent steam inside the tank from flowing out, thereby improving the sealing performance and achieving a pressure-holding effect.

[0032] A second sealing ring 37 is provided between the outer tube 301 and the inner tube 302, and the second sealing ring 37 is located above the air inlet pipe 35. The second sealing ring can prevent steam between the outer tube and the inner tube from flowing out from the connection between the tank cover and the motor, which can further improve the sealing effect.

[0033] The lower part of the outer tube 301 is fixedly connected to the tank 10 by multiple support rods 38. The support rods increase the stability of the double-layer tube, thereby ensuring the normal rotation of the shaft.

[0034] like Figure 2 As shown, the double-layer tube 30 includes an outer tube body 301, an inner tube body 302, and a connecting plate 303 connecting the lower part of the outer tube body 301 and the inner tube body 302. The air outlet 31 is formed on the connecting plate 303.

[0035] The upper parts of the outer tube 301 and the inner tube 302 are fixed to the can lid 20;

[0036] The outer tube 301 is connected to an air inlet pipe 35, which extends out of the tank 10. External steam enters the cavity between the outer and inner tubes through the air inlet pipe, and then the steam in the cavity flows out through the air outlet.

[0037] like Figure 4 As shown, the stirring part 34 includes a spiral plate 341, and the two ends of the spiral plate 341 are fixedly connected to the rotating shaft 32 through an upper rod 342 and a lower rod 343, respectively.

[0038] The number of spiral plates 341 is two or more, and the two or more spiral plates 341 are evenly distributed around the circumference of the rotating shaft 32. The spiral plates can turn the straw inside the tank up and down while completing normal mixing, which can further improve the mixing effect and prevent the problem of material accumulation at the bottom of the tank.

[0039] During operation, the chopped rice straw enters the tank through the feed pipe. After feeding is completed, the feed valve is closed. The motor drives the stirring unit to rotate through the shaft. The stirring unit stirs the straw in the tank. At the same time, steam enters the double-layer pipe and flows to the straw through the vent, so that the steam and straw can be in uniform contact, achieving the purpose of uniform heating of the straw. After steam is introduced and pressure is maintained for a period of time, the discharge valve is opened instantly, and the exploded straw flows out from the discharge pipe.

[0040] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A steam explosion device for processing rice straw into pulp, comprising a tank body (10) and a tank cover (20) sealed and fixed to the upper part of the tank body (10); characterized in that: The can lid (20) is fixed with a double-layer tube (30) in the middle. The bottom of the double-layer tube (30) is provided with multiple air vents (31). A rotating shaft (32) is sleeved inside the double-layer tube (30). The upper end of the rotating shaft (32) is connected to a motor (33) that drives it to rotate. The rotating shaft (32) passes through the lower end of the double-layer tube (30) and is fixed with a stirring part (34). The air vents (31) face the stirring part (34).

2. The steam explosion device for processing rice straw into pulp according to claim 1, characterized in that: The double-layer tube (30) includes an outer tube body (301), an inner tube body (302), and a connecting plate (303) connecting the lower part of the outer tube body (301) and the inner tube body (302). The air outlet (31) is formed on the connecting plate (303). The upper parts of the outer tube (301) and the inner tube (302) are fixed to the can lid (20); The outer tube (301) is connected to an air inlet pipe (35), which extends out of the tank (10).

3. The steam explosion device for processing rice straw into pulp according to claim 2, characterized in that: A first sealing ring (36) is provided between the rotating shaft (32) and the inner tube (302).

4. The steam explosion device for processing rice straw into pulp according to claim 2, characterized in that: A second sealing ring (37) is provided between the outer tube (301) and the inner tube (302), and the second sealing ring (37) is located above the air intake pipe (35).

5. The steam explosion device for processing rice straw into pulp according to claim 2, characterized in that: The lower part of the outer tube (301) is fixedly connected to the tank (10) by multiple support rods (38).

6. The steam explosion device for processing rice straw into pulp according to claim 1, characterized in that: The stirring part (34) includes a spiral plate (341), and the two ends of the spiral plate (341) are fixedly connected to the rotating shaft (32) through the upper rod (342) and the lower rod (343) respectively.

7. The steam explosion device for processing rice straw into pulp according to claim 6, characterized in that: The number of spiral plates (341) is two or more, and the two or more spiral plates (341) are evenly distributed around the circumference of the axis of rotation (32).

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