Novel energy-saving rapeseed softening conditioning tower

Abstract

The utility model relates to rapeseed processing technical field, concretely relates to a novel energy -conserving rapeseed softening conditioning tower, including the closed tower body, the top and bottom of tower body are equipped with feeding port and discharge gate respectively, the inner chamber of tower body is divided into four working layers from top to bottom in proper order, including convection layer, passivation layer, drying layer and discharge layer, the bottom of each layer is equipped with indirect steam import, the bottom of passivation layer is equipped with direct steam import and is evenly distributed with a plurality of direct steam through -hole that communicates with direct steam import, the drying layer and discharge layer are equipped with the steam export that will steam discharge respectively, is equipped with rotating shaft along the axis of tower body, is equipped with the stirring rod that carries out the stirring of rapeseed on each layer on rotating shaft, the utility model relates to a novel energy -conserving rapeseed softening conditioning tower, can realize the efficient use of steam, stratified accurate conditioning and the accurate control of material residence time, guarantee the uniform stable of rapeseed quality after conditioning and reduce energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of rapeseed processing technology, specifically to a novel energy-saving rapeseed softening and conditioning tower. Background Technology

[0002] Softening and conditioning rapeseed before oil extraction is a key pretreatment step in oil processing that connects cleaning and pressing (or leaching). The core purpose is to change the physical properties and internal structure of rapeseed through physical and moisture regulation, laying the foundation for efficient and high-quality oil extraction.

[0003] Rapeseed softening and conditioning relies on moisture control and temperature assistance, making high-temperature steam an excellent medium. However, current technologies often utilize steam through direct or indirect heat exchange, resulting in low steam heat utilization. A large amount of high-temperature steam is discharged without sufficient heat exchange with the rapeseed, leading to energy waste. Furthermore, uneven steam distribution within the tower causes variations in the degree of heating and moisture absorption in different areas of the rapeseed, resulting in uneven moisture content and hardness after conditioning, affecting subsequent rolling and oil extraction. In addition, some equipment lacks precise control over the residence time of materials in each processing layer, leading to insufficient or excessive processing time for rapeseed in key stages such as softening and passivation, further reducing conditioning quality. Moreover, the structural design of traditional equipment results in low contact efficiency between steam and rapeseed, making targeted, layered, and precise conditioning impossible.

[0004] Therefore, there is an urgent need for a softening and conditioning device for rapeseed that can achieve efficient utilization of steam, precise stratified conditioning, and precise control of material residence time, so as to ensure uniform and stable quality of rapeseed after conditioning and reduce energy consumption. Utility Model Content

[0005] The present invention aims to provide a novel energy-saving rapeseed softening and conditioning tower, which can achieve efficient utilization of steam, precise stratified conditioning, and precise control of material residence time, thereby ensuring uniform and stable quality of rapeseed after conditioning and reducing energy consumption.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a novel energy-saving rapeseed softening and conditioning tower, comprising a closed tower body, with an inlet and an outlet at the top and bottom of the tower body, respectively. The inner cavity of the tower body is divided into four working layers from top to bottom, including a convection layer, a passivation layer, a drying layer, and a discharge layer. Each layer has an indirect steam inlet at the bottom. The passivation layer has a direct steam inlet at the bottom and multiple direct steam through holes evenly distributed therein. The drying layer and the discharge layer are respectively provided with steam outlets for discharging steam. A rotating shaft is provided along the axis of the tower body, and a stirring rod is provided on the rotating shaft to stir the rapeseed on each layer.

[0007] Furthermore, the angle between the axis of the steam outlet and the radial section of the tower body is 10° to 18°.

[0008] Furthermore, the diameter of the direct steam through-hole connecting to the passivation layer is smaller than the diameter of the direct steam through-hole connecting to the direct steam inlet.

[0009] Furthermore, each working layer is equipped with an automatic feeding gate, which opens to release the rapeseed when the height of the rapeseed on each layer reaches a set value.

[0010] Furthermore, the projections of the automatic feed gates on the cross-sections of adjacent working layers are perpendicular to each other.

[0011] Furthermore, the passivation layer, drying layer, and discharge layer have the same cross-sectional area, while the convection layer has a larger cross-sectional area than the passivation layer, drying layer, and discharge layer.

[0012] Furthermore, the lower end of the rotating shaft is connected to a drive motor that can drive the rotating shaft to rotate, and the tower body is provided with a manhole door for maintenance on each working level.

[0013] The beneficial effects of this scheme are as follows: through layered steam supply and steam cascade utilization, the steam in the drying layer and the discharge layer is discharged through the steam outlet and can be recovered to the convection layer, realizing the full utilization of steam heat and reducing the consumption of external steam. The timely discharge of excess steam from the steam outlet can also ensure that the rapeseed is not over-softened and tempered. The automatic feed gates of each working layer can ensure that the rapeseed has sufficient residence time in each layer, avoiding the problems of insufficient passivation or over-drying. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional schematic diagram of the present invention; Figure 3 for Figure 1 An enlarged schematic diagram of part A in the middle.

[0015] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: tower body 1, feed inlet 2, discharge outlet 3, convection layer 4, passivation layer 5, drying layer 6, discharge layer 7, indirect steam inlet 8, direct steam inlet 9, direct steam through hole 10, steam outlet 11, rotating shaft 12, stirring rod 13, drive motor 14, automatic material gate 15, manhole door 16. Detailed Implementation

[0016] 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.

[0017] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] Example 1 The basic implementation examples are as follows: Figure 1-3 As shown in the attached document Figure 1 The illustrated novel energy-saving rapeseed softening and conditioning tower includes a closed tower body 1. The top and bottom of the tower body 1 are respectively provided with an inlet 2 and an outlet 3. The inner cavity of the tower body 1 is divided into four working layers from top to bottom: a convection layer 4, a passivation layer 5, a drying layer 6, and a discharge layer 7. Wherein: Convection layer 4: Located at the top of tower body 1, its main function is to utilize the waste heat from the upper part of tower body 1 to preheat and initially absorb moisture from the newly entered rapeseed, thus achieving "waste heat recovery". To improve the convective heat transfer efficiency, the cross-sectional area of ​​the convection layer 4 is larger than that of the passivation layer 5, the drying layer 6, and the discharge layer 7, increasing the contact area between the rapeseed and the steam inside tower body 1 and extending the convective heat transfer time.

[0019] Passivation layer 5: Located below the troposphere 4, its core function is to deactivate anti-nutritional factors (such as glucosinolates) in rapeseed using high-temperature steam and regulate the moisture content of the rapeseed to a suitable range. To achieve "precise passivation," the bottom of the passivation layer 5 is equipped with an indirect steam inlet 8 and a direct steam inlet 9: the indirect steam inlet 8 connects to an external low-pressure steam pipe for indirect heating of the rapeseed through a baffle, maintaining the temperature stability of the passivation layer 5; the direct steam inlet 9 connects to an external high-pressure steam pipe, and the baffle of the passivation layer 5 is evenly distributed with multiple direct steam through-holes 10 communicating with the direct steam inlet 9. Direct steam is injected into the rapeseed through the through-holes to achieve direct heat exchange and moisture replenishment. (See attached image) Figure 2 As shown, the diameter of the direct steam through-hole 10 connected to the passivation layer 5 is smaller than the diameter of the through-hole connected to the direct steam inlet 9. This design can increase the flow rate when the direct steam is ejected, making the steam more evenly distributed in the rapeseed, while also preventing the rapeseed from falling into the direct steam through-hole 10.

[0020] Drying layer 6: Located below the passivation layer 5, its function is to moderately dry the passivated rapeseed, removing excess moisture to meet the moisture requirements for subsequent rolling (usually 9%-12%). The bottom of the drying layer 6 is equipped with an indirect steam inlet 8, providing heat for drying through indirect heat exchange. Simultaneously, the side wall of the drying layer 6 is equipped with a steam outlet 11 to discharge excess steam after heat exchange. The discharged steam can be recovered to the convection layer 4 through a pipe (not shown in the figure), realizing the secondary utilization of steam waste heat and reducing energy consumption.

[0021] Discharge layer 7: Located at the bottom of tower body 1, its function is to temporarily store the dried rapeseed and discharge it stably through discharge port 3. The bottom of discharge layer 7 is provided with an indirect steam inlet 8 to maintain the temperature of the rapeseed and prevent moisture condensation caused by a sudden drop in temperature before discharge; at the same time, the side wall of discharge layer 7 is also provided with a steam outlet 11 to discharge the low-pressure steam remaining in tower body 1. This steam can also be recovered to convection layer 4 or other stages that require a low-temperature heat source.

[0022] A rotating shaft 12 is provided along the axis of the tower body 1. Stirring rods 13 are mounted on the rotating shaft 12 to agitate the rapeseed on each layer. The rotating shaft 12 extends through the bottom of the four working layers (which can be sealed using existing mechanical seals). Its upper end is fixed to the end cap at the top of the tower body 1 via bearings, and its lower end extends to the outside of the tower body 1 and is connected to a drive motor 14 that drives the rotating shaft 12 (the motor is connected to the rotating shaft 12 via a reducer, allowing for speed adjustment). Stirring rods 13 are positioned on the rotating shaft 12 corresponding to each working layer. When the drive motor 14 drives the rotating shaft 12 to rotate, the stirring rods 13 uniformly agitate the rapeseed on each layer, preventing clumping and promoting full contact between the rapeseed and steam, thus improving heat exchange uniformity.

[0023] Each working layer of the tower body 1 is equipped with a manhole 16 for maintenance. The size of the manhole 16 is suitable for maintenance personnel to enter and exit, which facilitates the maintenance and cleaning of components such as the stirring rod 13, steam passage, and automatic material gate 15 on each layer.

[0024] To improve steam utilization efficiency, the steam outlets 11 on the drying layer 6 and the discharge layer 7 are both connected to an external steam recovery pipe (not shown in the figure). The recovery pipe transports the discharged low-pressure steam to the steam inlet of the convection layer 4 to achieve "steam cascade utilization". At the same time, the angle between the axis of the steam outlet 11 and the radial section of the tower body 1 is 10° to 18°. This tilt angle design can prevent the steam outlet 11 from being blocked by rapeseed, and at the same time guide the steam to flow along the side wall of the tower body 1, prolonging the residence time of the steam in the tower body 1 and improving the heat exchange efficiency.

[0025] like Figure 3As shown, the projections of the automatic feed gates 15 on the cross-section of adjacent working layers are perpendicular to each other radially. This means that the automatic feed gates 15 on adjacent working layers are located on two diameters of the cross-section (which is circular) projection, and the two diameters are perpendicular to each other. This ensures that when rapeseed from the upper layer falls into the lower layer, it will not fall directly through the automatic feed gates 15 and fall back down, ensuring that the rapeseed stays in each working layer for a sufficient amount of time.

[0026] As a preferred embodiment, the operation process of this application is as follows: Feeding stage: After cleaning, the rapeseed is conveyed to the feed inlet 2 at the top of tower 1 by a hoist; Convection preconditioning stage: After the rapeseed enters the convection layer 4, the rotating shaft 12 drives the stirring rod 13 to stir. At the same time, the low-pressure steam (from the drying layer 6 and the discharge layer 7) transported by the recovery pipeline enters the convection layer 4 through the indirect steam inlet 8 to preheat and initially absorb moisture from the rapeseed. After a residence time of 10 minutes, the automatic material gate 15 opens and the rapeseed falls into the passivation layer 5. Passivation stage: After the rapeseed enters the passivation layer 5, 0.6MPa steam is introduced through the indirect steam inlet 8 to maintain the temperature inside the layer at 100-110℃, and 0.6MPa steam is introduced through the direct steam inlet 9 and sprayed into the rapeseed through the variable diameter through-hole to achieve direct heat exchange and moisture replenishment (moisture content rises to 14%-15%). The stirring rod 13 continuously stirs to ensure uniform steam distribution. After a residence time of 15 minutes, the automatic feed gate 15 opens and the rapeseed falls into the drying layer 6. Drying stage: After the rapeseed enters the drying layer 6, 0.25MPa steam is introduced through the indirect steam inlet 8 to dry the rapeseed and remove excess moisture (moisture content is reduced to 8%-9%). The low-pressure steam generated during the drying process is discharged through the steam outlet 11 and enters the recovery pipe. After a residence time of 8 minutes, the automatic material gate 15 is opened and the rapeseed falls into the discharge layer 7. Discharge stage: After the rapeseed enters the discharge layer 7, 0.25MPa steam is introduced through the indirect steam inlet 8 to maintain the temperature (65℃-75℃) and prevent moisture condensation; residual steam is discharged and recovered through the steam outlet 11; finally, the rapeseed is discharged from the discharge port 3 through the star-shaped discharge valve and transported to the subsequent rolling process.

[0027] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A novel energy-saving rapeseed softening and conditioning tower, characterized in that: The tower includes a closed tower body with a feed inlet and a discharge outlet at the top and bottom, respectively. The inner cavity of the tower body is divided into four working layers from top to bottom: a convection layer, a passivation layer, a drying layer, and a discharge layer. Each layer has an indirect steam inlet at the bottom. The passivation layer has a direct steam inlet at the bottom and multiple direct steam through holes evenly distributed therein. The drying layer and the discharge layer each have a steam outlet for discharging steam. A rotating shaft is provided along the axis of the tower body, and a stirring rod is provided on the rotating shaft to stir the rapeseed on each layer.

2. The novel energy-saving rapeseed softening and conditioning tower according to claim 1, characterized in that: The angle between the axis of the steam outlet and the radial section of the tower body is 10° to 18°.

3. The novel energy-saving rapeseed softening and conditioning tower according to claim 2, characterized in that: The diameter of the direct steam through-hole connecting to the passivation layer is smaller than the diameter of the direct steam through-hole connecting to the direct steam inlet.

4. The novel energy-saving rapeseed softening and conditioning tower according to claim 3, characterized in that: Each working layer is equipped with an automatic feeding gate, which opens to release the rapeseed when the height of the rapeseed on each layer reaches the set value.

5. The novel energy-saving rapeseed softening and conditioning tower according to claim 4, characterized in that: The projections of the automatic feed gates on the cross-sections of adjacent working layers are perpendicular to each other.

6. The novel energy-saving rapeseed softening and conditioning tower according to claim 5, characterized in that: The passivation layer, drying layer, and discharge layer have the same cross-sectional area, while the convection layer has a larger cross-sectional area than the passivation layer, drying layer, and discharge layer.

7. The novel energy-saving rapeseed softening and conditioning tower according to claim 1, characterized in that: The lower end of the rotating shaft is connected to a drive motor that can drive the rotating shaft to rotate, and the tower body is equipped with a manhole door for maintenance on each working level.

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