A low temperature desolventizing machine and method of use thereof

Abstract

This invention discloses a low-temperature desolventizing machine and its usage method, relating to the field of grain and oil deep processing technology. The low-temperature desolventizing machine includes a machine body and a steam-water integrated utilization device. The machine body includes a cylinder and a rotating mechanism. The cylinder includes a front end cover and a rear end cover located at its front and rear ends. The cylinder also includes an inner cylinder, which is equipped with a feed inlet, a front settling tank, a solvent gas inlet, a rear settling tank, and a discharge outlet. An outer jacket is provided outside the inner cylinder, comprising an annular jacket and multiple flow-guiding jackets. The steam-water integrated utilization device is connected to the flow-guiding jackets and the annular jacket via pipelines and can provide hot water circulation and flash steam heating to the inner cylinder. This invention uses hot water and flash steam instead of steam heating, changing the traditional A-cylinder / B-cylinder desolventizing method, and solving the problems of high residual solvent content, low nitrogen solubility index, dark color, high powder content, and large moisture loss in low-temperature meal, greatly reducing solvent and steam consumption.

Description

Technical Field

[0001] This invention relates to the field of deep processing technology of grain and oil, and in particular to a desolventizing device for producing low-temperature oilseed meal, specifically a low-temperature desolventizing machine and its usage method. Background Technology

[0002] After pre-treatment processes such as cleaning, conditioning, drying, crushing, and rolling, oilseeds like soybeans and peanuts enter the leaching workshop. Inside the leaching unit, the oil is extracted using solvents to obtain solvent-containing wet meal. The solvent extractor is the core equipment for separating the solvent from the wet meal and producing low-temperature meal; its quality directly affects various economic and technical indicators of low-temperature meal production. Therefore, selecting a reasonable and efficient solvent extractor is of great significance for reducing residual solvent in low-temperature meal, increasing the nitrogen solubility index, and retaining moisture. Well-known solvent extractors include: DT vertical steam extractor, DTDC vertical steam extractor, and AB drum solvent extractor; these solvent extractors are widely used in the leaching oil extraction and deep processing of grains and oils.

[0003] With the advancement of deep processing technology for grains and oils, grain and oil processing enterprises are paying more attention to protein denaturation during solvent removal from wet meal, as well as the nitrogen solubility index of low-temperature meal, residual solvent content, meal color, meal powderiness, and moisture content. The aforementioned vertical steam desolventizers all use indirect heating via a heating layer and direct steam desolventizing, resulting in severely denatured proteins in the finished meal. The aforementioned AB cylinder desolventizer uses indirect heating via an outer jacket and solvent steam desolventizing, but the resulting low-temperature meal has high residual solvent content, low nitrogen solubility index, dark color, high powderiness, and significant moisture loss. Summary of the Invention

[0004] This invention provides a low-temperature desolventizing machine and its usage method, which not only solves the problems of high residual solvent, large protein denaturation, and low nitrogen solubility index of low-temperature meal, but also solves the problems of dark color, large powderiness, and large moisture loss of low-temperature meal. As a result, the consumption of steam and solvent in production is greatly reduced, and the technical indicators of low-temperature meal are significantly improved.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: a low-temperature desolventizing machine, comprising a machine body and a steam-water integrated utilization device; the machine body includes a cylinder and a rotating mechanism; wherein, the cylinder includes a front end cover and a rear end cover located at its front and rear ends, and the cylinder also includes an inner cylinder, which is provided with a feed inlet, a front settling tank, a solvent gas inlet, a rear settling tank, and a discharge outlet; an outer jacket is provided outside the inner cylinder, the outer jacket including an annular jacket and multiple flow guiding jackets; the steam-water integrated utilization device is connected to the flow guiding jacket and the annular jacket through pipes, and is able to provide hot water circulation and flash steam heating for the inner cylinder.

[0006] As a further improvement to the above scheme, the feed inlet and the front settling tank are both fixed above the front part of the outer wall of the inner cylinder; the solvent gas inlet is fixed in the middle part of the outer wall of the inner cylinder; the rear settling tank is fixed above the middle part of the outer wall of the inner cylinder; the discharge port is fixed below the rear part of the outer wall of the inner cylinder; the front settling tank and the rear settling tank are both provided with side jackets on their sides, and both are provided with mixed gas outlets at their tops, and both are provided with windproof caps inside; the bottom of the side jacket has a liquid inlet, and the top of the side jacket has a liquid outlet.

[0007] As a further improvement to the above scheme, the inner cylinder also includes an annular sealing plate, which includes a left annular sealing plate and a right annular sealing plate; both the left and right annular sealing plates have rectangular openings below them; the right side of the right annular sealing plate is connected to a sealing channel, which includes two oppositely arranged side plates, the top of which is connected to a top plate, and a gravity door is hinged to the top plate.

[0008] As a further improvement to the above solution, the flow guiding interlayer includes a reinforcing ring and an outer cylinder; wherein, the reinforcing ring is fixed to the outer wall of the inner cylinder, the outer cylinder is fixed to the reinforcing ring, an inlet is provided at the bottom of the outer wall of the outer cylinder, an outlet is provided at the top of the outer wall of the outer cylinder, and multiple flow guiding plates are also provided on the outer wall of the inner cylinder, which can divide the flow guiding interlayer into multiple continuous "S" shaped channels.

[0009] The annular jacket also includes a reinforcing ring and an outer cylinder. The annular jacket also includes an inner partition, a steam inlet, a non-condensable gas outlet, and a condensate outlet. The inner partition is fixed to the inner cylinder and the corresponding reinforcing ring. The steam inlet and the non-condensable gas outlet are respectively located on both sides of the inner partition. The condensate outlet is located below the outer cylinder of the annular jacket.

[0010] As a further improvement to the above scheme, the rotating mechanism includes a rotor, which includes a rotor main beam, an inner front end plate, an inner rear end plate, and multiple sets of tilting plates. The two ends of the rotor main beam are fixed to the inner front end plate and the inner rear end plate, respectively. A rotor partition plate is also provided on the rotor main beam away from the inner front end plate. A front section of spiral blades is provided between the rotor partition plate and the inner front end plate, and a rear section of spiral blades is provided between the rotor partition plate and the inner rear end plate. Each set of tilting plates has multiple pieces, which are evenly fixed to the outer side of the rotor main beam along the circumference. A set of tilting plates is provided at certain intervals along the direction of the rotor main beam.

[0011] As a further improvement to the above solution, the rotating mechanism also includes a front rotating shaft and a rear rotating shaft, wherein one end of the front rotating shaft is fixed to the outer drive wheel, and the other end of the front rotating shaft is fixed to the inner front end plate; the rear rotating shaft is fixed to the inner rear end plate.

[0012] As a further improvement to the above solution, the rotor partition plate is located in the gap between the left annular sealing plate and the right annular sealing plate, and can divide the desolventizing machine into two independent spaces: a desolventizing chamber and a drying chamber.

[0013] As a further improvement to the above solution, the steam and water comprehensive utilization device includes a comprehensive utilization tank and a hot water circulation pump; the comprehensive utilization tank is equipped with a partition, and a T-shaped overflow pipe is provided on the right side of the partition. The horizontal part of the overflow pipe passes through and is fixed to the partition, and the upper end of the vertical part of the overflow pipe passes through and is fixed to the top of the comprehensive utilization tank; a condensate collection port, a flash steam outlet, and a condensate inlet are provided on the upper right side of the comprehensive utilization tank; a hot water inlet, a steam vent, and a direct steam inlet are provided on the upper left side of the comprehensive utilization tank; the direct steam inlet is inserted into the comprehensive utilization tank and connected to a horizontal steam injection pipe; multiple holes are provided below the steam injection pipe; a hot water outlet, a vent, a temperature detector, and a liquid level detector are provided at the bottom of the comprehensive utilization tank.

[0014] The technical solution adopted by the present invention to solve its technical problem is: a method of using a low-temperature desolventizing machine. First, the cylinder is preheated. Soft water enters the comprehensive utilization tank through the hot water inlet. Then, it is heated to 90°C by direct steam. The cylinder is heated by the hot water circulation pump. At the same time, the desolventizing machine is started and rotated slowly.

[0015] The hot water circulation pump sends hot water from the hot water outlet of the comprehensive utilization tank into the inlet of the first guide jacket, and then discharges it from the outlet of the first guide jacket. Next, hot water enters the inlets of the second and third guide jackets and discharges it from the outlets of the second and third guide jackets. Then, hot water enters the inlets of the fourth and fifth guide jackets and discharges it from the outlets of the fourth and fifth guide jackets. Then, hot water enters the inlet of the sixth guide jacket and discharges it from the outlet of the sixth guide jacket. Finally, hot water enters the inlets of the front settling tank and the rear settling tank respectively and discharges it from the outlets of the front settling tank and the rear settling tank, flowing back into the comprehensive utilization tank.

[0016] The condensate produced in the leaching workshop enters the comprehensive utilization tank through the condensate collection port. The flash steam enters the steam inlet of the annular jacket of the desolventizing machine from the flash steam outlet to heat the inner cylinder. Finally, the non-condensable gas is discharged from the non-condensable gas outlet of the annular jacket.

[0017] The wet meal containing solvent enters the desolventizing chamber through the feed inlet. Under the action of the rotor, it is turned and thrown up, and flash evaporates with the high temperature solvent gas to remove most of the solvent. Then, under the action of the front spiral blades, it passes through the sealed channel and enters the drying chamber. The remaining solvent is carried away by the negative pressure airflow to obtain low-temperature desolventized meal.

[0018] When shutting down, open the drain valve on the pipeline to drain the water inside the cylinder into the comprehensive utilization tank.

[0019] As can be seen from the above technical solutions, the beneficial effects of the present invention are: using hot water and condensate flash steam instead of steam as the heating source for the desolventizing machine cylinder reduces the temperature of the heating medium, resulting in low-temperature meal with low protein denaturation, light color, less moisture loss, and low meal powder content. At the same time, using hot water and flash steam instead of steam greatly reduces steam consumption and saves processing costs.

[0020] In the solvent removal chamber, 98% of the solvent in the wet meal is flash-evaporated by circulating solvent vapor. Then, it passes through a sealed channel into the drying chamber, where residual solvent volatilized from the meal is removed by external negative pressure airflow, resulting in qualified low-temperature meal. This method changes the traditional method of using A-tube and B-tube desolventizing, minimizing residual solvent in the low-temperature meal and reducing solvent consumption in production, thus bringing greater economic benefits to enterprises. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the cylinder structure of the low-temperature desolventizing machine in this invention;

[0022] Figure 2 This is a cross-sectional view of the second flow guide layer (along...) Figure 1 (AA section)

[0023] Figure 3 This is a cross-sectional view of the first flow guide layer (along...) Figure 1 (in the middle of BB area);

[0024] Figure 4 This is a sectional view of the annular jacket (along...) Figure 1 (CC section)

[0025] Figure 5 This is a schematic diagram of the rotating mechanism in this invention;

[0026] Figure 6 yes Figure 5 Schematic diagram of the structure viewed in cross section along the middle DD;

[0027] Figure 7 This is a schematic diagram of the structure of the tank used in this invention;

[0028] Figure 8 This is a process flow diagram of the low-temperature desolventizing machine.

[0029] In the diagram: 1. Cylinder; 2. Rotating mechanism; 3. Inner cylinder; 4. Outer jacket; 5. Front cover; 6. Rear cover; 7. Windproof cap; 8. Mixed gas outlet; 9. Front settling tank; 10. Side jacket; 11. Liquid inlet; 12. Liquid outlet; 13. Rear settling tank; 14. Guide plate; 15. Reinforcing ring; 16. Outer cylinder; 17. Solvent gas inlet; 18. Annular sealing plate; 19. Left annular sealing plate; 20. Right annular sealing plate; 21. First guide jacket; 22. Second guide jacket; 23. Third guide jacket; 24. Fourth guide jacket; 25. Fifth guide jacket; 26. Sixth guide jacket; 27. Annular jacket; 28. Steam inlet; 29. ​​Non-condensable gas outlet; 30. Condensate outlet; 31. Inner baffle; 32. Feed inlet; 33. Discharge outlet; 34. Sealed channel; 35. Side plate; 36. Top plate; 37. Gravity door; 38. External drive wheel; 39. Rotating front axle; 40. Inner front end plate; 41. Rotor; 42. Rotor main beam; 43. Front section spiral blades; 44. Rotor partition plate; 45. Rear section spiral blades; 46. Tilting plate; 47. Inner rear end plate; 48. Rotating rear axle; 49. Comprehensive utilization tank; 50. Condensate collection port; 51. Flash steam outlet; 52. Condensate inlet; 53. Overflow pipe; 54. Hot water inlet; 55. Exhaust port; 56. Direct steam inlet; 57. Hot water outlet; 58. Temperature detector; 59. Liquid level detector; 60. Steam injection pipe; 61. Baffle plate; 62. Drain port; 63. Hot water circulation pump; 64. Pneumatic regulating valve; 65. Pneumatic switching valve; 66. Drain valve. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0031] Reference Figure 1-5 As shown, the present invention provides a low-temperature desolventizing machine, including a machine body and a gas-water integrated utilization device; the machine body includes a cylinder 1 and a rotating mechanism 2, the cylinder 1 includes an inner cylinder 3, an outer jacket 4, a front end cover 5, and a rear end cover 6; the inner cylinder 3 is provided with a feed inlet 32, a front settling tank 9, a solvent gas inlet 17, an annular sealing plate 18, a rear settling tank 13, and a discharge outlet 33 along its length; and the feed inlet 32 ​​and the front settling tank 9 are both fixed to the inner cylinder. The front upper part of the outer wall of the inner cylinder 3; the solvent gas inlet 17 is fixed in the middle of the outer wall of the inner cylinder 3; the rear settling tank 13 is fixed in the upper middle part of the outer wall of the inner cylinder 3; the discharge port 33 is fixed in the lower rear part of the outer wall of the inner cylinder 3; the front settling tank 9 and the rear settling tank 13 are both provided with side interlayers 10 on their sides, and both are provided with mixed gas outlets 8 on their tops, and both are provided with windproof caps 7 inside; the side interlayer 10 has a liquid inlet 11 at the bottom and a liquid outlet 12 at the top.

[0032] The annular sealing plate 18 includes a left annular sealing plate 19 and a right annular sealing plate 20; both the left annular sealing plate 19 and the right annular sealing plate 20 are fixed at 2 / 3 of the inner wall of the inner cylinder 3; both the left annular sealing plate 19 and the right annular sealing plate 20 have rectangular openings below them; the right side of the right annular sealing plate 20 is connected to the sealing channel 34; the sealing channel 34 includes a side plate 35, a top plate 36, and a gravity door 37; the side plate 35 is fixed to the right annular sealing plate 20 and the inner cylinder 3; the gravity door 37 is connected to the top plate 36 via a hinge.

[0033] The outer interlayer 4 includes an annular jacket 27 and several flow-guiding interlayers, such as... Figure 1 As shown, the flow guiding interlayers are a first flow guiding interlayer 21, a second flow guiding interlayer 22, a third flow guiding interlayer 23, a fourth flow guiding interlayer 24, a fifth flow guiding interlayer 25, and a sixth flow guiding interlayer 26.

[0034] Each flow-guiding interlayer includes a reinforcing ring 15, a flow-guiding plate 14, and an outer cylinder 16. The reinforcing ring 15 and the flow-guiding plate 14 are both fixed to the outer wall of the inner cylinder 3; the outer cylinder 16 is fixed to the reinforcing ring 15; an inlet 11 is located at the lower part of the outer wall of the outer cylinder 16; and an outlet 12 is located at the upper part of the outer wall of the outer cylinder 16. In this embodiment, the gap between the flow-guiding plate 14 and the inner wall of the outer cylinder 16 is no greater than 1.5 mm. Each flow-guiding interlayer is divided into several continuous "S"-shaped channels by the flow-guiding plate 14. When hot water flows within the "S"-shaped channels, it needs to constantly change direction, which prolongs the residence time of the hot water within the flow-guiding interlayer, enabling more thorough heating. Furthermore, the flow of hot water within the "S"-shaped channels generates disturbance, which can disrupt the thermal boundary layer between water layers, increase the convective heat transfer coefficient, and thus enhance the heat transfer effect.

[0035] The annular jacket 27 includes a reinforcing ring 15, an inner partition 31, an outer cylinder 16, a steam inlet 28, a non-condensable gas outlet 29, and a condensate outlet 30. The inner partition 31 is fixed to the outer wall of the inner cylinder 3 and the reinforcing ring 15. The upper part of the outer wall of the outer cylinder is provided with the steam inlet 28 and the non-condensable gas outlet 29, and the steam inlet 28 and the non-condensable gas outlet 29 are respectively distributed on both sides of the inner partition 31. The lower part of the outer wall of the outer cylinder is provided with the condensate outlet 30.

[0036] Reference Figure 5 , Figure 6The rotating mechanism 2 includes an outer drive wheel 38, a front rotating shaft 39, a rotor 41, and a rear rotating shaft 48. The rotor 41 is axially arranged with an inner front end plate 40, a rotor main beam 42, a rotor partition plate 44, a front helical blade 43, a rear helical blade 45, a tipping plate 46, and an inner rear end plate 47. The rotor main beam 42 is composed of eight rectangular steel tubes, with both ends of the rectangular steel tubes fixed to the inner front end plate 40 and the inner rear end plate 47, respectively. The rotor partition plate 44 is fixed at 2 / 3 of the rotor main beam 42; the front spiral blade 43 and the rear spiral blade 45 are each composed of 4 sets of spiral blades, which are fixed at equal intervals on the outside of the rotor main beam 42; the turning plates 46 are 4 pieces per group, which are evenly fixed on the outside of the rotor main beam 42 along the circumference, and the turning plates 46 are provided every 650mm along the direction of the rotor main beam 42; one end of the rotating front shaft 39 is fixed to the outer drive wheel 38, and the other end is fixed to the inner front end plate 40; the rotating rear shaft 48 is fixed to the inner rear end plate 47; in the embodiment, the rotor partition plate 44 is inserted into the gap between the left annular sealing plate 19 and the right annular sealing plate 20, dividing the desolventizing machine into two independent spaces: a desolventizing chamber and a drying chamber.

[0037] Reference Figure 7 The steam and water comprehensive utilization device includes a comprehensive utilization tank 49 and a hot water circulation pump 63. A partition 61 is installed inside the comprehensive utilization tank 49. An overflow pipe 53, shaped like a "T," is located on the right side of the partition 61. The horizontal portion of the overflow pipe 53 passes through and is fixed to the partition 61, while the upper end of the vertical portion protrudes and is fixed above the comprehensive utilization tank 49. A condensate collection port 50, a flash steam outlet 51, and a condensate inlet 52 are located on the upper right side of the comprehensive utilization tank 49. A hot water inlet 54, a steam vent 55, and a direct steam inlet 56 are located on the upper left side of the comprehensive utilization tank 49. The direct steam inlet 56 is inserted into the comprehensive utilization tank 49 and connected to a horizontal steam injection pipe 60. Several small holes of Ø3.0mm are located below the steam injection pipe 60. A hot water outlet 57, a vent 62, a temperature detector 58, and a liquid level detector 59 are located at the bottom of the comprehensive utilization tank 49.

[0038] Reference Figure 8This invention also discloses a method for using a low-temperature desolventizing machine, wherein a steam-water integrated utilization device is arranged below the machine body. In use, the desolventizing machine cylinder 1 is first preheated. Soft water enters the integrated utilization tank 49 through the hot water inlet 54, and is then heated to 90°C with direct steam. The hot water circulation pump 63 heats the desolventizing machine cylinder 1, while the desolventizing machine is started and slowly rotated. The hot water circulation pump 63 sends hot water from the hot water outlet 57 of the integrated utilization tank 49 into the inlet 11 of the first guide jacket 21, and then discharges it from the outlet 12 of the first guide jacket 21. Next, hot water enters through the inlets 11 of the second guide jacket 22 and the third guide jacket 23, and discharges from the outlets 12 of the second guide jacket 22 and the third guide jacket 23. Finally, hot water enters through the inlets 11 of the fourth guide jacket 24 and the fifth guide jacket 25. The hot water enters through the outlet 12 of the fourth guide jacket 24 and the fifth guide jacket 25, then enters through the inlet 11 of the sixth guide jacket 26 and exits through the outlet 12 of the sixth guide jacket 26. Finally, the hot water enters through the inlet 11 of the front settling tank 9 and the rear settling tank 13 respectively, and exits through the outlet 12 of the front settling tank 9 and the rear settling tank 13. It then flows back into the comprehensive utilization tank 49 through the hot water inlet 54.

[0039] As production in the leaching workshop proceeds, the condensate from all the steam equipment enters the comprehensive utilization tank 49 through the condensate collection port 50. The flash steam generated in the comprehensive utilization tank 49 enters the steam inlet 28 of the annular jacket 27 of the desolventizer from the flash steam outlet 51. The flash steam heats the inner cylinder 3 in the annular jacket 27. Finally, the non-condensable gas is discharged from the non-condensable gas outlet 29 at the top of the annular jacket 27, and the condensate is discharged from the bottom of the annular jacket 27 and flows into the comprehensive utilization tank 49 through the condensate inlet 52. The liquid level on the right side of baffle 61 in the comprehensive utilization tank 49 continuously rises, while condensate flows into the left side of the baffle through overflow pipe 53. The liquid level on the left side of baffle 61 in the comprehensive utilization tank 49 is automatically controlled by a liquid level detector 59. When the liquid level is about 50mm below the overflow pipe, the pneumatic switch valve 65 closes; when it is about 300mm below the overflow pipe, the pneumatic switch valve 65 opens. The water temperature on the left side of baffle 61 is automatically controlled by a temperature detector 58. When the water temperature is below 85℃, the pneumatic regulating valve 64 for direct steam opens; when the water temperature reaches 90℃, the pneumatic regulating valve 64 for direct steam closes. In actual use, hot water and condensate flash steam are used instead of steam as the heating source for the desolventizing machine cylinder, reducing the temperature of the heating medium. The resulting low-temperature meal has low protein denaturation, less moisture loss, and low meal powder content, while significantly reducing steam consumption during production.

[0040] Under the action of the external solvent circulation fan, air enters the desolventizing chamber from the solvent gas inlet 17 and exits from the mixed gas outlet 8, achieving circulation inside the desolventizing chamber. The solvent gas is heated to 125°C by the external heat exchange equipment. The wet meal containing solvent enters the desolventizing chamber through the feed inlet 32. Under the action of the rotor, the turning plate 46 drives the wet meal to turn and toss, causing it to "flash evaporate" with the high-temperature solvent gas flowing in the opposite direction. The solvent in the wet meal is rapidly vaporized and sucked away by the external circulating fan from the mixed gas outlet 8. After multiple turns and tosses, 98% of the solvent is separated from the wet meal, which becomes desolventized meal. The desolventized meal passes through the sealed channel 34 and enters the drying chamber under the action of the front spiral blades 43. Then, under the action of the rear spiral blades 45, it continues to move forward. The rotating rotor 41 drives the turning plate 46 to rotate. The desolventized meal turns and tosses multiple times, and the residual solvent gas that evaporates is carried away by the external negative pressure airflow from the mixed gas outlet 8 above the rear settling tank 13. The finished meal is discharged from the discharge outlet 33 under the propulsion of the rear spiral blades 45. The low-temperature desolventizing machine changes the traditional method of using A-cylinder and B-cylinder desolventizing, which minimizes the residual solvent in the low-temperature meal and reduces solvent consumption in production.

[0041] When shutting down, open the bottom drain valve 66 to drain the water from part 1 of the machine cylinder into the comprehensive utilization tank 49.

[0042] This invention features a compact structure and simple operation. It not only solves the problems of high residual solubility, large protein denaturation, and low nitrogen solubility index in low-temperature meal, but also addresses the issues of dark color, large powderiness, and excessive moisture loss in low-temperature meal. The consumption of solvents and steam during production is greatly reduced, saving production costs and bringing greater economic benefits to enterprises.

[0043] In the description of this invention, the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "vertical," and "horizontal," if applicable, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only to describe the invention and not to require the invention to be constructed or operated in a specific orientation; therefore, they should not be construed as limiting the invention. The terms "connected" and "linked" in this invention should be interpreted broadly. For example, they can refer to a connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of these terms based on the specific circumstances.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in its embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A low-temperature desolventizing machine, characterized in that, The device includes a main body and a steam-water integrated utilization device. The main body includes a cylinder (1) and a rotating mechanism (2). The cylinder (1) includes a front end cover (5) and a rear end cover (6) located at its front and rear ends. The cylinder (1) also includes an inner cylinder (3). The inner cylinder (3) is provided with a feed inlet (32), a front settling tank (9), a solvent gas inlet (17), a rear settling tank (13), and a discharge outlet (33). An outer jacket (4) is provided on the outside of the inner cylinder (3). The outer jacket (4) includes an annular jacket (27) and multiple flow guiding jackets. The steam-water integrated utilization device is connected to the flow guiding jacket and the annular jacket (27) through a pipe and can provide hot water circulation and flash steam heating for the inner cylinder (3). The flow guide interlayer includes a reinforcing ring (15) and an outer cylinder (16); wherein, the reinforcing ring (15) is fixed to the outer wall of the inner cylinder (3), the outer cylinder (16) is fixed to the reinforcing ring (15), an inlet (11) is provided at the bottom of the outer wall of the outer cylinder (16), an outlet (12) is provided at the top of the outer wall of the outer cylinder (16), and multiple flow guide plates (14) are also provided on the outer wall of the inner cylinder (3), the flow guide plates (14) can divide the flow guide interlayer into multiple continuous "S" shaped channels; The annular jacket (27) also includes a reinforcing ring (15) and an outer cylinder (16). The annular jacket (27) also includes an inner partition (31), a steam inlet (28), a non-condensable gas outlet (29), and a condensate outlet (30). The inner partition (31) is fixed to the inner cylinder (3) and the corresponding reinforcing ring (15). The steam inlet (28) and the non-condensable gas outlet (29) are respectively located on both sides of the inner partition (31). A condensate outlet (30) is provided below the outer cylinder (16) on the annular jacket (27). The steam and water comprehensive utilization device includes a comprehensive utilization tank (49) and a hot water circulation pump (63); the comprehensive utilization tank (49) is equipped with a partition (61), and a T-shaped overflow pipe (53) is provided on the right side of the partition (61). The horizontal part of the overflow pipe (53) passes through and is fixed to the partition (61), and the upper end of the vertical part of the overflow pipe (53) passes through and is fixed above the comprehensive utilization tank (49); a condensate collection port (50) and a flash steam outlet are provided on the upper right side of the comprehensive utilization tank (49). The comprehensive utilization tank (49) has an inlet (51) and a condensate inlet (52); a hot water inlet (54), a steam vent (55) and a direct steam inlet (56) are provided on the upper left side of the comprehensive utilization tank (49); the direct steam inlet (56) is inserted into the comprehensive utilization tank (49) and connected to a horizontal steam injection pipe (60); multiple holes are provided below the steam injection pipe (60); a hot water outlet (57), an vent (62), a temperature detector (58) and a liquid level detector (59) are provided at the bottom of the comprehensive utilization tank (49).

2. The low-temperature desolventizing machine according to claim 1, characterized in that, The feed inlet (32) and the front settling tank (9) are both fixed above the front part of the outer wall of the inner cylinder (3); the solvent gas inlet (17) is fixed in the middle part of the outer wall of the inner cylinder (3); the rear settling tank (13) is fixed above the middle part of the outer wall of the inner cylinder (3); the discharge port (33) is fixed below the rear part of the outer wall of the inner cylinder (3); the front settling tank (9) and the rear settling tank (13) are both provided with side jackets (10) on the side, and both are provided with mixed gas outlets (8) on the top, and both are provided with windproof caps (7) inside; the side jacket (10) has a liquid inlet (11) at the bottom and a liquid outlet (12) at the top.

3. The low-temperature desolventizing machine according to claim 1, characterized in that, The inner cylinder (3) also includes an annular sealing plate (18), which includes a left annular sealing plate (19) and a right annular sealing plate (20); both the left annular sealing plate (19) and the right annular sealing plate (20) have rectangular openings below them; the right side of the right annular sealing plate (20) is connected to the sealing channel (34), which includes two oppositely arranged side plates (35), and the top of the two side plates (35) is connected to a top plate (36), and a gravity door (37) is hinged on the top plate (36).

4. The low-temperature desolventizing machine according to claim 3, characterized in that, The rotating mechanism (2) includes a rotor (41), which includes a rotor main beam (42), an inner front end plate (40), an inner rear end plate (47), and multiple sets of turning plates (46). The two ends of the rotor main beam (42) are fixed to the inner front end plate (40) and the inner rear end plate (47), respectively. A rotor partition plate (44) is also provided at a position away from the inner front end plate (40) on the rotor main beam (42). A front section spiral blade (43) is provided between the rotor partition plate (44) and the inner front end plate (40), and a rear section spiral blade (45) is provided between the rotor partition plate (44) and the inner rear end plate (47). Each set of turning plates (46) has multiple pieces, which are uniformly fixed on the outside of the rotor main beam (42) along the circumference. A set of turning plates (46) is provided at certain intervals along the direction of the rotor main beam (42).

5. The low-temperature desolventizing machine according to claim 4, characterized in that, The rotating mechanism (2) also includes a front rotating shaft (39) and a rear rotating shaft (48), wherein one end of the front rotating shaft (39) is fixed to the outer drive wheel (38), and the other end of the front rotating shaft (39) is fixed to the inner front end plate (40); the rear rotating shaft (48) is fixed to the inner rear end plate (47).

6. The low-temperature desolventizing machine according to claim 4, characterized in that, The rotor partition plate (44) is located in the gap between the left annular sealing plate (19) and the right annular sealing plate (20), and can divide the desolventizing machine into two independent spaces: a desolventizing chamber and a drying chamber.

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