Vertical digester for fungus grass raw materials

Abstract

The utility model provides a vertical digester for fungus grass raw materials, which is used for solving the problems of incomplete filtration caused by softening of the raw materials and complicated subsequent treatment and low efficiency caused by easy mixing of black liquor and the raw materials in the prior art. The digester comprises a pot body formed by combining an upper cone, a barrel and a lower cone, a filter screen fixedly covers the inner side wall of the upper cone, the top end of the upper cone is communicated with a charging port, a plurality of filter pore plates are fixed to the middle of the inner side of the barrel, and the upper ends and the lower ends of the filter pore plates are fixedly connected with the barrel through sealing plates. A plurality of middle circulation connectors are correspondingly arranged on the cylinder body behind the filtering pore plate, the lower cone is connected with a three-way connector through a bell-shaped transition opening, a lower filtering plate is connected between the large end and the small end of the transition opening, and the side wall of the transition opening is communicated with a liquid outlet. The bell-shaped transition opening is matched with the lower filter plate to form a cavity, so that black liquor can be conveniently separated from raw materials, and grass raw materials can be stably filtered by arranging a plurality of filter pore plates.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical steam cookers, in particular to a vertical steam cooker used for Juncao raw materials. Background Art

[0002] With the improvement of environmental protection requirements and the rational use of resources, the processing of Juncao raw materials has received more and more attention. As an effective processing equipment, the vertical digester has shown many advantages in raw material processing, environmental protection and safety, but it also has some potential disadvantages and limitations. During the heating and softening process, the volume of Juncao raw materials will be significantly reduced, and traditional digesters often lack a filtering mechanism that can adapt to this volume change. Therefore, during the cooking process, the filtering effect of the raw materials is difficult to maintain stability, and it is easy to be blocked or incompletely filtered, affecting the product quality. During the cooking process, black liquor is easily mixed with the raw materials, resulting in complicated and inefficient subsequent processing, increasing production costs, and the hot black liquor and part of the raw materials generated by traditional digesters during the cooking process are often directly discharged and fail to be effectively recycled. This not only wastes precious thermal energy resources, but also causes serious pollution to the environment, which does not meet the current development requirements of environmental protection and energy conservation. Utility Model Content

[0003] The utility model provides a vertical digester for Juncao raw materials, which solves the problems in the prior art of incomplete filtration caused by softening of raw materials and easy mixing of black liquor with raw materials, resulting in complicated and inefficient subsequent treatment.

[0004] The technical solution of the utility model is achieved in this way:

[0005] A vertical cooker for mushroom grass raw materials comprises a pot body composed of an upper cone, a cylinder and a lower cone, the side wall of the upper cone is connected with an exhaust port and a recovery liquid outlet, the inner side wall of the upper cone is covered and fixed with a filter screen, the top of the upper cone is connected with a loading port, the side wall of the top of the cylinder is provided with a plurality of spray ports, a plurality of filter holes are fixed in the middle of the inner side of the cylinder, the upper and lower ends of the filter holes are fixedly connected to the cylinder through a sealing plate, a plurality of intermediate circulation interfaces are correspondingly provided on the cylinder behind the filter holes, the lower cone is connected with a three-way interface through a bell-shaped transition port, the large end of the transition port is connected to the small end of the lower cone, a conical lower filter plate is connected between the large end and the small end of the transition port, the transition port and the lower filter plate cooperate to form a cavity, and the side wall of the transition port is connected with a liquid outlet.

[0006] Further, a sealing top cover is placed on the top end of the charging opening through a flange. A plurality of electromagnets are circumferentially arrayed on the flange. Magnetic plates corresponding to the electromagnets one by one are provided on the sealing top cover. Two concentric positioning rings are provided on the top surface of the flange. Conductive rings are provided at the top ends of the positioning rings. Positioning grooves cooperating with the positioning rings are provided on the bottom surface of the sealing top cover. Conductive plates are fixed in the positioning grooves. Two ends of the conductive plates can be respectively communicated with the conductive rings. A bracket is provided at the top end of the upper cone. A plurality of fixing devices are circumferentially arrayed on the bracket along the circumference of the flange. By pulling the magnetic plates with the electromagnets, the sealing top cover can be quickly and accurately aligned with the positioning rings on the flange during the descending process, thus simplifying the sealing operation and improving the sealing efficiency and accuracy.

[0007] Further, the fixing device includes a support column. A pressing block is hinged to the top end of the support column. An oblong hole is provided at one end of the pressing block away from the sealing top cover. An expansion rod is provided on one side of the support column away from the sealing top cover. The top end of the expansion rod slides in the oblong hole. The automatic extension and contraction of the expansion rod reduce the need for manual operation and improve the automation level of the sealing and opening processes of the charging opening.

[0008] Further, transfer areas are provided on both sides of the bracket. The transfer areas can store the sealing top cover and the blanking top cover. The blanking top cover is communicated with a corrugated pipe. The corrugated pipe can adjust the position of the blanking top cover to a certain extent, making the blanking process more flexible, capable of adapting to raw materials of different sizes and types, and increasing the applicability of the equipment.

[0009] Further, a plurality of rotating rods are vertically arrayed in the spray opening. Adjusting baffles are hinged to the rotating rods, and the bottom ends of the adjusting baffles are all inclined towards the inside of the pot body. Connecting rods are hinged to the same ends of the adjusting baffles, and the connecting rods are all fixed on an adjusting rod. One end of the adjusting rod is connected to the side wall of the spray opening through a spring. Automatic adjustment is achieved through the mechanical structure and the spring, without the need for complex electrical control or manual intervention, simplifying the operation process, reducing the operation difficulty, and at the same time reducing the risk of failures caused by human operation errors.

[0010] Further, arc-shaped plates with opposite directions are provided at both ends of the adjusting baffle. The arc-shaped plates of adjacent adjusting baffles can be buckled with each other. Through the mutual buckling of the arc-shaped plates, effective closure of the spray opening can be achieved without using additional sealing materials.

[0011] Further, a liquid inlet is communicated with the lower cone. The liquid inlet is perpendicular to the side wall of the lower cone. A small pipe is communicated in the liquid inlet. One end of the small pipe away from the liquid inlet is inclined towards the small end of the lower cone. The inclination of the small pipe can effectively prevent raw materials from directly entering the liquid inlet and reduce the risk of blockage.

[0012] The beneficial effects that can be produced by this technical solution.

[0013] The utility model can form a cavity through a bell-shaped transition port in cooperation with a lower filter plate, which is convenient for separating black liquor from raw materials. By arranging a plurality of filter orifice plates, the grass raw materials with continuously decreasing height during the reaction process can be stably filtered. By recycling hot black liquor, waste emissions are reduced, meeting environmental protection requirements. The air extraction port on the upper cone can effectively maintain the stability of the pressure inside the pot and reduce potential safety hazards caused by gases during the reaction process. Through the cooperation of the conductive plate and the positioning ring on the sealing top cover, the need for workers to work at high altitudes and the cumbersome and error-prone manual inspection are reduced, improving the overall operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0015] Figure 1 is the schematic plan view of the present utility model;

[0016] Figure 2 is the partial structural schematic view at the filter orifice plate of the present utility model

[0017] Figure 3 is Figure 1 the partial enlarged schematic view at A in

[0018] Figure 4 is Figure 1 the partial enlarged schematic view at B in

[0019] Figure 5 is the three-dimensional structural schematic view at the upper cone of the present utility model;

[0020] Figure 6 is the exploded sectional view at the upper cone of the present utility model;

[0021] Figure 7 is the three-dimensional structural schematic view of the fixing device of the present utility model;

[0022] Figure 8 is the structural schematic view at the adjusting baffle inside the spray port of the present utility model.

[0023] Wherein: 1. upper cone, 2. cylinder body, 3. lower cone, 4. air extraction port, 5. recycled liquid outlet, 6. filter screen, 7. charging port, 8. spray port, 9. filter orifice plate, 10. sealing plate, 11. middle circulation interface, 12. transition port, 14. lower filter plate, 15. liquid outlet, 16. sealing top cover, 17. flange, 18. electromagnet, 19. positioning ring, 20. positioning groove, 21. conductive plate, 22. bracket, 23. support column, 24. pressing block, 25. oblong hole, 26. telescopic rod, 27. transfer area, 28. corrugated pipe, 29. rotating rod, 30. adjusting baffle, 31. connecting rod, 32. adjusting rod, 33. spring, 34. arc plate, 35. liquid inlet, 36. small pipe. Specific embodiments

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] As Figures 1-3 Shown in FIGS. 5, an upright cooker for mushroom grass raw materials provided by an embodiment of the present invention includes a pot body composed of an upper cone 1, a cylinder body 2 and a lower cone 3. The side wall of the upper cone 1 is communicated with an air extraction port 4 and a recycled liquid outlet 5. The inner side wall of the upper cone 1 is covered and fixed with a filter screen 6. The top end of the upper cone 1 is communicated with a charging port 7. The side wall of the top end of the cylinder body 2 is provided with a plurality of spray ports 8. A plurality of filter orifice plates 9 are fixed in the middle of the inner side of the cylinder body 2. The upper and lower ends of the filter orifice plate 9 are fixedly connected with the cylinder body 2 through sealing plates 10. A plurality of middle circulation interfaces 11 are correspondingly arranged on the cylinder body 2 behind the filter orifice plate 9. The lower cone 3 is connected with a three-way interface through a bell-shaped transition port 12. The large end of the transition port 12 is connected with the small end of the lower cone 3. A conical lower filter plate 14 is connected between the large end and the small end of the transition port 12. The transition port 12 and the lower filter plate 14 cooperate to form a cavity. The side wall of the transition port 12 is communicated with a liquid outlet 15.

[0026] During the preparation process, after the raw materials are de-ironed, screened, and washed, they are sent to the charging port 7 by a belt conveyor for pot loading. At the same time, the gas in the pot can be extracted by a fan connected to the air extraction port 4. Then, steam is introduced to hydrolyze the raw materials, reducing the pH value of the hydrolyzate to 2 - 3. After reaching the target hydrolysis factor, the pre-hydrolysis reaction is stopped during neutralization. Then, after heating, an alkaline solution is pumped from the bottom of the pot into the pot to form a strongly alkaline neutralization liquid layer, which flows upward to terminate the reaction by converting the acidic condition of the pre-hydrolysis reaction into a strongly alkaline one. After neutralization, hot black liquor treatment is carried out immediately. First, hot black liquor is added from the bottom upward. When the neutralization liquid reaches the pot mouth, hot black liquor is added simultaneously from the bottom and top of the digester, and the neutralization liquid is displaced from the filter orifice plate 9 in the middle of the digester and the middle circulation interface 11. In this way, the degraded hemicellulose is basically dissolved in the neutralization liquid, and the displaced neutralization liquid is stored in the warm black liquor tank. The hot black liquor is the cooking black liquor generated in the previous cooking cycle from the hot black liquor tank. Its heat and residual chemicals are used to pretreat the chips, creating conditions for a large amount of delignification in the next cooking and also achieving an energy-saving effect. The neutralization liquid and part of the hot black liquor enter the warm black liquor tank, and the black liquor is then filtered by a fiber filter and cooled before being sent to alkali recovery. The volume of herbaceous raw materials will decrease after heating and softening. By setting multiple filter orifice plates 9, the continuously decreasing herbaceous raw materials during the reaction process can be stably filtered. A cavity can be formed by the bell-shaped transition port 12 and the lower filter plate 14 to facilitate the separation of black liquor from the raw materials. Subsequently, the reacted raw materials can be discharged through a three-way interface. Preferably, there are 4 filter orifice plates 9. The three-way interface can facilitate the connection of the lower cone 3 to various pipelines. The upper and lower ends of the filter net 6 are fixed to the upper cone 1 by a sealing plate 10 to prevent the raw materials from being directly discharged through the gap between the filter net 6 and the upper cone 1 without filtration.

[0027] As Figure 5 , 6 shown, at the top of the charging port 7, a sealing top cover 16 is placed through a flange 17. A plurality of electromagnets 18 are circumferentially arrayed on the flange 17. Magnetic plates corresponding to the electromagnets 18 one by one are provided on the sealing top cover 16. Two concentric positioning rings 19 are provided on the top surface of the flange 17. A conductive ring is provided at the top of the positioning ring 19. A positioning groove 20 cooperating with the positioning ring 19 is provided on the bottom surface of the sealing top cover 16. A conductive plate 21 is fixed in the positioning groove 20, and the conductive plate 21 connects the conductive ring and provides an electrical signal. At the top of the upper cone 1, a bracket 22 is provided, and a plurality of fixing devices are circumferentially arrayed on the bracket 22 along the flange 17. A clamping block can be provided at the top of the sealing top cover 16, which can facilitate the clamping of the overhead crane with the sealing top cover 16. Both the warning device and the clamping block are prior arts. The conductive ring can serve as a switch for the fixing device or the warning device.

[0028] When it is necessary to close the charging port 7, the overhead crane can be used to engage with the sealing top cover 16, driving the sealing top cover 16 to move above the flange 17. Then, the electromagnet 18 is activated to make the electromagnet 18 pull the magnetic plate. After that, the sealing top cover 16 is slowly lowered. By the electromagnet 18 pulling the magnetic plate, the positioning grooves 20 on the sealing top cover 16 and the positioning ring 19 can be quickly aligned for sealing. A sealing ring can be provided on the sealing top cover 16 between the two positioning grooves 20 for sealing. The conductive ring forms an electric current path under the connection of the conductive plate 21 and provides power for the warning device or the fixing device. The warning device can remotely remind the staff through the wireless module that the sealing top cover 16 has been completely closed, greatly reducing the tediousness and errors of manual inspection. And when the conductive ring and the conductive plate 21 are connected, the fixing device can be activated to fix the sealing top cover 16, effectively preventing the sealing top cover 16 from loosening or falling off due to reasons such as steam pressure and mechanical vibration, thus ensuring the safe operation of the steamer. At the same time, the sealing ring on the sealing top cover 16 further enhances the sealing effect and reduces the risk of steam leakage. A camera can be provided on the overhead crane to remotely observe and control the overhead crane, reducing the need for staff to work at high altitudes. The warning device, the camera, and the remote module are prior arts.

[0029] As Figure 6 , 7 shown, the fixing device includes a support column 23. The top end of the support column 23 is hinged with a pressing block 24. A long circular hole 25 is provided at one end of the pressing block 24 away from the sealing top cover 16. A telescopic rod 26 is provided on one side of the support column 23 away from the sealing top cover 16. The top end of the telescopic rod 26 slides in the long circular hole 25. The telescopic rod 26 can be an existing hydraulic telescopic rod 26, pneumatic telescopic rod 26, or electric push rod, etc. When the telescopic rod 26 is a hydraulic telescopic rod 26 or a pneumatic telescopic rod 26, the conductive ring and the conductive plate 21 are only the switches of the electrical signal or the warning device.

[0030] During use, after the conductive ring and the conductive plate 21 are connected, the telescopic rod 26 is extended. Through the long circular hole 25, the pressing block 24 rotates along the support column 23, and the pressing block 24 presses the sealing top cover 16 tightly. When it is necessary to open the sealing top cover 16, the telescopic rod 26 is remotely controlled to contract, and one end of the pressing block 24 close to the sealing cover plate moves away from the sealing cover plate, so that the sealing top cover 16 can be easily removed. The extension and contraction of the telescopic rod 26 are controlled by the connection and disconnection of the conductive ring and the conductive plate 21, so as to realize the automatic pressing and release of the pressing block 24 on the sealing top cover 16, improve the convenience and safety of operation, and reduce the need for direct manual intervention. Since the structure of the fixing device is simple and the action is controlled by an electric signal, the maintenance and repair work is relatively easy. The design of the pressing block 24 rotating along the support column 23 can provide a uniform pressure distribution and enhance the reliability of the seal. The telescopic rod 26 can respond quickly, so that the fixing or releasing action can be completed quickly, which helps to improve the overall operation efficiency.

[0031] As Figure 5 、 6 shown, transfer storage areas 27 are provided on both sides of the support 22. The transfer storage areas 27 can store the sealing top cover 16 and the blanking top cover. The blanking top cover is communicated with a corrugated pipe 28. The structure and usage method of the blanking top cover and the sealing top cover 16 are basically the same. The difference is that a blanking hole is provided on the blanking top cover, and the blanking hole is communicated with the corrugated pipe 28. The corrugated pipe 28 can guide the raw materials, so that the raw materials can quickly enter the pot body and prevent the raw materials from spilling. Through the transfer storage areas 27, it is convenient to quickly store and retrieve the blanking top cover and the sealing top cover 16 when they are replaced, reducing the time for movement and replacement, thereby improving the overall operation efficiency. A guard plate can be arranged around the transfer storage areas 27 to prevent the blanking top cover and the sealing top cover 16 from falling due to the vibration of the pot body, increasing the safety of the operation process.

[0032] As Figure 6 、 8As shown, a plurality of rotating rods 29 are vertically arrayed in the spray nozzle 8. An adjusting baffle 30 is hinged on the rotating rod 29, and the bottom ends of the adjusting baffles 30 are all inclined towards the inside of the pot body. The same ends of the adjusting baffles 30 are all hinged with a connecting rod 31, and the connecting rods 31 are all fixed on the adjusting rod 32. One end of the adjusting rod 32 is connected to the side wall of the spray nozzle 8 through a spring 33. To facilitate the adjustment of the spraying angle, the adjusting baffle 30 can rotate along the rotating rod 29 through the hinge. Through the connecting rod 31 and the adjusting rod 32, the adjusting baffles 30 form a whole, which is convenient for driving and adjusting a plurality of adjusting baffles 30. When media such as steam or reaction liquid is introduced into the spray nozzle 8, by adjusting the flow rate and pressure of the media, different magnitudes of thrust can be applied to the adjusting baffle 30. At the same time, the adjusting baffle 30 provides corresponding resistance to the media, so that the angle at which the media enters the pot body is adjusted accordingly. When there is no media flow, the spring 33 applies a pulling force to the adjusting baffle 30 through the connecting rod 31, so that the adjacent adjusting baffles 30 are in contact and closed. And the spring 33 can also apply a pulling force to the adjusting baffle 30, so that the adjusting baffle 30 needs to overcome the resistance of the spring 33 during the rotation process, ensuring that the adjusting baffle 30 can provide the resistance required for the media to change direction. Since the adjusting baffle 30 is connected through the connecting rod 31 and the adjusting rod 32, it can respond as a whole to the thrust of the media and adjust the angle. It ensures that the spraying angle can be adjusted with the change of the media conditions, improving the spraying efficiency and uniformity.

[0033] As Figure 8 shown, arc-shaped plates 34 with opposite orientations are provided at both ends of the adjusting baffle 30, and the arc-shaped plates 34 of adjacent adjusting baffles 30 can be buckled with each other. When it is necessary to temporarily close the spray nozzle 8, by adjusting the position of the adjusting baffle 30, the arc-shaped plates 34 of adjacent adjusting baffles 30 are buckled with each other to form a tight contact surface, which can quickly and effectively close the spray nozzle 8 without additional closing devices or complex control systems, simplifying the overall structure of the equipment and reducing the manufacturing cost and maintenance cost.

[0034] As Figure 1 、 4As shown, the lower cone 3 is connected with a liquid inlet 35. The liquid inlet 35 is perpendicular to the side wall of the lower cone 3. A small tube 36 is connected inside the liquid inlet 35. One end of the small tube 36 away from the liquid inlet 35 inclines towards the small end of the lower cone 3. The liquid inlet 35 on the side wall of the lower cone 3 facilitates injecting hot black liquor into the pot body from the bottom. The small tube 36 can prevent the forage from directly entering the liquid inlet 35, thereby preventing the blockage of the liquid inlet 35. And during the process of dilution and feeding, the small tube 36 guides the diluted black liquor, enabling the diluted black liquor to wash the raw materials piled up at the small end of the lower cone 3, achieving the effect of preventing the blockage of the raw materials. The inclined small tube 36 can reduce the deposition of raw materials near the liquid inlet 35, facilitate the injection of the diluted black liquor and the hot black liquor into the lower cone 3, and prevent the raw materials from entering the hot black liquor pipe along the liquid inlet 35.

[0035] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vertical steamer for mushroom grass raw materials, comprising a pot body composed of an upper cone (1), a cylinder (2) and a lower cone (3), characterized in that: The side wall of the upper cone (1) is connected to an air exhaust port (4) and a recovery liquid outlet (5); the inner side wall of the upper cone (1) is covered and fixed with a filter screen (6); the top of the upper cone (1) is connected to a loading port (7); the side wall of the top of the cylinder (2) is provided with a plurality of spray ports (8); a plurality of filter orifice plates (9) are fixed in the middle of the inner side of the cylinder (2); the upper and lower ends of the filter orifice plates (9) are fixedly connected to the cylinder (2) through a sealing plate (10); and the filter A plurality of intermediate circulation interfaces (11) are correspondingly arranged on the cylinder (2) behind the orifice plate (9); the lower cone (3) is connected to a three-way interface through a bell-shaped transition port (12); the large end of the transition port (12) is connected to the small end of the lower cone (3); a conical lower filter plate (14) is connected between the large end and the small end of the transition port (12); the transition port (12) and the lower filter plate (14) cooperate to form a cavity; and the side wall of the transition port (12) is connected to a liquid outlet (15).

2. A vertical digester for Juncao raw materials according to claim 1, characterized in that: A sealing top cover (16) is placed at the top of the charging port (7) through a flange (17), a plurality of electromagnets (18) are arranged in a circumferential array on the flange (17), a magnetic plate corresponding to the electromagnets (18) is arranged on the sealing top cover (16), two concentric positioning rings (19) are arranged on the top surface of the flange (17), a conductive ring is arranged at the top of the positioning ring (19), a positioning groove (20) cooperating with the positioning ring (19) is arranged on the bottom surface of the sealing top cover (16), a conductive plate (21) is fixed in the positioning groove (20), and the two ends of the conductive plate (21) can be connected to the conductive ring respectively, a bracket (22) is arranged at the top of the upper cone (1), and a plurality of fixing devices are arranged on the bracket (22) along the circumferential array of the flange (17).

3. A vertical digester for Juncao raw materials according to claim 2, characterized in that: The fixing device comprises a support column (23), the top end of the support column (23) is hinged with a pressing block (24), one end of the pressing block (24) away from the sealing top cover (16) is provided with an oblong hole (25), and a telescopic rod (26) is provided on the side of the support column (23) away from the sealing top cover (16), and the top end of the telescopic rod (26) slides in the oblong hole (25).

4. A vertical digester for Juncao raw materials according to claim 2, characterized in that: Transfer areas (27) are provided on both sides of the support (22). The transfer areas (27) can store the sealing top cover (16) and the material discharge top cover. The material discharge top cover is connected to a bellows (28).

5. A vertical digester for Juncao raw materials according to claim 1, characterized in that: A plurality of rotating rods (29) are arranged in a vertical array in the spray port (8), and an adjusting baffle (30) is hingedly connected to the rotating rod (29), and the bottom ends of the adjusting baffles (30) are all inclined toward the inside of the pot body, and the same ends of the adjusting baffles (30) are hingedly connected to connecting rods (31), and the connecting rods (31) are all fixed on adjusting rods (32), and one end of the adjusting rod (32) is connected to the side wall of the spray port (8) through a spring (33).

6. A vertical digester for Juncao raw materials according to claim 5, characterized in that: The two ends of the adjusting baffle (30) are provided with arc-shaped plates (34) facing opposite directions, and the arc-shaped plates (34) of adjacent adjusting baffles (30) can be interlocked.

7. A vertical digester for Juncao raw materials according to claim 1, characterized in that: The lower cone (3) is connected to a liquid inlet (35), which is perpendicular to the side wall of the lower cone (3). The liquid inlet (35) is connected to a small tube (36), and one end of the small tube (36) away from the liquid inlet (35) is inclined toward the small end of the lower cone (3).

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