Novel high-efficiency rapeseed oil deacidification and deodorization tower

Abstract

The utility model relates to the technical field of grain and oil processing discloses novel high -efficient rapeseed oil deacidification and deodorization tower, the main part is connected by flange and is composed of the packing tower and the plate type tower, and is equipped with heat conducting oil jacket, vapour phase lead out cylinder, flow guide bulkhead, oil receiving tray and steam distributor and the like components, heat conducting oil jacket can respectively control two section tower body temperature, ensure that the grease is stable in the optimum interval, avoid low temperature peculiar smell residue, after the grease enters the vapour phase lead out cylinder, first by the packing tower packing dispersion into thin oil film preliminary removal easy volatile peculiar smell, then by oil receiving tray lead into flow guide bulkhead, prevent wall flow short circuit and prolong the residence time, and fully secondary contact with steam, and the peculiar smell transfer efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of grain and oil processing technology, specifically to a novel high-efficiency rapeseed oil deacidification and deodorization tower. Background Technology

[0002] Rapeseed oil, a traditional and widely consumed edible oil in my country, holds an important position in the grain and oil processing industry due to its rich unsaturated fatty acids and nutritional advantages. However, during actual production and storage, rapeseed oil is prone to developing noticeable off-odors, seriously affecting product quality, edible experience, and market competitiveness. The sources of these off-odors mainly include three aspects: First, the inherent components of the raw materials. Substances such as glucosinolates and erucic acid in rapeseed easily decompose during processing such as pressing and leaching, generating volatile off-odor substances such as thiols and nitrogen-containing compounds. Second, byproducts of processing. During high-temperature processing, oil undergoes oxidation and hydrolysis reactions, producing off-odor components such as aldehydes, ketones, and free fatty acids. Third, improper subsequent storage. Exposure to air, light, and high temperatures leads to secondary oxidation, further exacerbating the off-odor. Currently, traditional deodorization equipment generally suffers from insufficient contact between the oil and the vapor phase and inadequate oil temperature, resulting in incomplete odor removal and failing to meet the needs of large-scale production of high-quality rapeseed oil. Based on this, the following improvements are proposed. Utility Model Content

[0003] The present invention aims to provide a novel and efficient rapeseed oil deacidification and deodorization tower to solve the problems of insufficient contact between oil and vapor phase and incomplete odor removal caused by insufficient oil temperature in the prior art.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a novel high-efficiency rapeseed oil deacidification and deodorization tower, comprising a packed tower and a plate tower connected to the lower part of the packed tower, the packed tower and the plate tower being fixedly connected by flanges, the packed tower containing packing and support rings; both the outer walls of the packed tower and the plate tower are fitted with heat transfer oil jackets, the heat transfer oil jackets having heat transfer oil inlets and outlets; a vapor phase outlet cylinder is connected to the top flange of the packed tower, the top of the vapor phase outlet cylinder having a vapor phase outlet, and the middle of the vapor phase outlet cylinder having an oil inlet; the bottom end of the plate tower has an oil outlet, and the plate tower contains several steam distributors; the top of the plate tower has a flow guiding compartment, which is used to guide the flow of oil to ensure the residence time of oil in the tower; the top of the plate tower also has an oil receiving tray, which is located above the flow guiding compartment and is used to guide the flow of oil into the flow guiding compartment.

[0005] The beneficial effects of this solution are as follows: both the packed tower and the plate tower are fitted with heat transfer oil jackets with heat transfer oil inlets and outlets on their outer walls. The heat transfer oil circulates through the inlets and outlets. The heating temperature of the two tower sections can be adjusted according to the different needs of pre-deodorization in the packed tower and deep deodorization in the plate tower, ensuring that the oil inside the tower remains stable in the optimal deodorization temperature range of 240-260℃, and avoiding the residue of odor substances caused by local low temperature.

[0006] After entering from the middle of the vapor phase outlet, the grease first flows through the packing layer in the packed tower. The packing disperses the grease into a thin oil film through surface wetting, increasing the initial contact area with the rising vapor phase and completing the initial removal of volatile odor substances. Subsequently, the grease enters the plate tower, where the oil receiving tray at the top precisely guides the grease into the flow guiding compartment, avoiding wall flow short-circuiting caused by the grease directly scouring the tower wall. The flow guiding compartment guides the grease to flow along a preset path, extending the residence time of the grease in the plate tower, allowing the grease to achieve sufficient secondary contact with the vapor phase sprayed from the vapor distributor in the tower, and significantly improving the transfer efficiency of odor substances from the oil phase to the vapor phase.

[0007] Preferably, as an improvement, packing and a support ring are also provided inside the vapor phase outlet tube below the vapor phase outlet. The support ring is located at the upper and lower ends of the packing and is fixedly connected to the inner wall of the vapor phase outlet tube and the packed tower.

[0008] Preferably, as an improvement, the support ring includes several support plates arranged symmetrically at the center, the height of the support plates being the same, forming a circular structure together, and the circular structure being fixedly connected to the inner wall of the vapor phase outlet cylinder.

[0009] The beneficial effects are: the centrally symmetrical support plate structure not only ensures the firm connection between the support ring and the inner wall of the vapor phase outlet cylinder, but also avoids obstruction of vapor phase flow.

[0010] Preferably, as an improvement, four double-layer plate units are arranged side by side along the transverse direction of the tower body inside the plate tower.

[0011] Preferably, as an improvement, the steam distributor is correspondingly installed at the plate unit and the top of the plate tower. Each plate unit is equipped with a set of Monma pumps. The steam input end of the Monma pumps is connected to the steam distributor to achieve forced mixing and stripping of oil and steam.

[0012] The beneficial effects are as follows: After the Monma pump is connected to the steam distributor, the oil is drawn in and forcibly emulsified and mixed by high-speed steam injection, which improves the oil-steam contact ratio and steam utilization rate, and significantly shortens the high-temperature residence time.

[0013] Preferably, as an improvement, each plate unit is provided with an overflow pipe, which is used to connect the upper and lower plate units, control the liquid level, and guide the flow of grease.

[0014] Preferably, as an improvement, the flow-guiding compartment is arranged in two layers, each layer including four vertically arranged partitions extending radially along the tower body. The inner ends of the partitions are connected and the outer ends extend to the inner wall of the tower body, dividing the corresponding cross-section of the cylindrical tower body into four independent fan-shaped segments. At least three of the four partitions in each layer are provided with flow-guiding ports, which are opened along the height direction of the partitions. Rapeseed oil flows into the adjacent fan-shaped segments through the flow-guiding ports to prolong the contact time between rapeseed oil and steam in the tower.

[0015] The beneficial effects are as follows: Existing technologies have short oil flow paths and are prone to short circuits. This solution uses a double-layer flow-guiding compartment to divide the oil into fan-shaped segments through radial baffles, and at least three baffles have flow-guiding ports, so that the oil overflows layer by layer and flows cell by cell. After the double-layer structure is superimposed, even low concentrations of residual odor substances can fully contact the vapor phase, thereby improving the odor removal rate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a top view of an embodiment of the present utility model; Figure 3 This is a schematic diagram of a plate tower structure according to an embodiment of the present utility model; Figure 4 These are schematic diagrams of the oil receiving tray from the front and top views of an embodiment of this utility model. Figure 5 These are top views of the first compartment and front views of the partition of the flow-guiding compartment in an embodiment of this utility model; Figure 6 These are top views of the second compartment of the flow-guiding compartment and front views of the partition plate in an embodiment of this utility model; Figure 7 These are front and top views of the support ring according to an embodiment of this utility model. Detailed Implementation

[0017] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: packed tower 1, plate tower 2, oil receiving tray 21, guide hole 211, grease outlet 22, tower plate 23, deodorization chamber one 231, overflow pipe one 2311, deodorization chamber two 232, overflow pipe two 2321, collecting chamber 233, Monma pump 24, central column 25, vapor phase outlet cylinder 3, vapor phase outlet 31, grease inlet 32, guide compartment 4, baffle one 41, baffle two 42, second guide port 421, baffle three 43. Third guide port a431, Third guide port b432, Baffle 4 44, Fourth guide port 441, Baffle 5 45, Baffle 6 46, Sixth guide port 461, Baffle 7 47, Seventh guide port a471, Seventh guide port b472, Baffle 8 48, Eighth guide port 481, Vent 49, Support ring 5, Ring plate 51, Support plate 52, Rib plate 53, Packing 54, Steam distributor 6, Heat transfer oil jacket 7, Heat transfer oil inlet and outlet 71.

[0018] Example like Figures 1-3 , Figure 7 The novel high-efficiency rapeseed oil deacidification and deodorization tower shown includes a packed tower 1 and a plate tower 2 connected to the lower part of the packed tower 1. The packed tower 1 and the plate tower 2 are fixedly connected by flanges. The packed tower 1 is equipped with packing 54 and support rings 5. A vapor phase outlet cylinder 3 is connected to the top flange of the packed tower 1. A vapor phase outlet 31 is opened at the top of the vapor phase outlet cylinder 3. An oil inlet 32 ​​is provided in the middle of the vapor phase outlet cylinder 3. An oil inlet pipe is fixedly installed at the oil inlet 32 ​​for supplying rapeseed oil. The packing 54 and support rings 5 ​​are also provided in the vapor phase outlet cylinder 3 below the vapor phase outlet 31 and above the oil inlet 32. The support rings 5 ​​are located at the upper and lower ends of the packing 54 and are fixedly connected to the inner walls of the vapor phase outlet cylinder 3 and the packed tower 1. The support rings 5 ​​include eight pieces arranged in a central position. The eight support plates 52 are symmetrically arranged and have the same height, forming a circular structure. This circular structure is fixedly connected to the inner wall of the vapor phase outlet cylinder 3. Specifically, the inner ends of the eight support plates 52 are welded to each other, and the radial lengths from the inner ends to the outer ends are all the same. The outer ends of the eight support plates 52 are welded with ring plates 51, which are welded to the outer ends of the eight support plates 52. The outer ring of the ring plates 51 is tangent to the inner ring of the vapor phase outlet cylinder 3. The vapor phase outlet cylinder 3 and the support ring 5 are simultaneously welded with triangular ribs 53, thereby fixing the support ring 5 to the cylinder body. The packing 54 is filled in the support rings 5 ​​at the upper and lower ends, thereby fixing the packing 54 to the cylinder body. The packing 54 and the support ring 5 in the packed tower 1 are arranged in the same way, which will not be described in detail here.

[0019] like Figures 1-4As shown, both the packed tower 1 and the plate tower 2 are fitted with heat transfer oil jackets 7 on their outer walls. Each heat transfer oil jacket 7 has a heat transfer oil inlet and outlet 71. The heat transfer oil jackets 7 are welded and fixed to the outer cylinders of the packed tower 1 and the plate tower 2. Four heat transfer oil jackets 7 are installed on the packed tower 1 and fitted around its lower part. A connecting frame is fixedly installed at the top of the plate tower 2, and an oil receiving tray 21 is installed on the connecting frame. The oil receiving tray 21 has a guide hole 211, and its bottom surface is inclined towards the guide hole 211. A steam distributor 6 is fixedly installed at the top of the oil receiving tray 21 at the top of the plate tower 2 to supply steam to the packed tower 1. An oil outlet 22 is located at the bottom of the plate tower 2, and two tower plates 23 are installed inside. The two tower plates 23 divide the plate tower 2 from top to bottom into a deodorization chamber 1 231, a deodorization chamber 232, and a collection chamber 233. The centers of the deodorization chamber 1 231 and the deodorization chamber 232 are vertically aligned. A central column 25 is installed vertically. Monma pumps 24 are fixedly installed on both sides of the central column 25 in deodorization chamber 1 (231) and deodorization chamber 2 (232). A steam distributor 6 is also installed on the outside of the plate tower 2, below deodorization chambers 1 (231) and 232. The steam input end of the Monma pump 24 is connected to the steam distributor 6. Overflow pipe 1 (2311) and overflow pipe 231 are vertically installed on the bottom plates of deodorization chambers 1 (231) and 232, respectively. 2321, the overflow pipe connects the upper and lower chambers, the height of the top of the overflow pipe from the tray 23 is the overflow liquid level, and the bottom protrudes from the tray 23; the deodorization chamber 1 231 and its internal components, the deodorization chamber 22 and its internal components together constitute a double-layer plate unit, and four double-layer plate units are arranged horizontally side by side in the plate tower 2; the heat transfer oil jacket 7 on the plate tower 2 is set to two and corresponds to the outside of the deodorization chamber 1 231 and the deodorization chamber 22 232 respectively.

[0020] like Figures 3-6As shown, a flow guiding compartment 4 is installed above the deodorization chamber 231 in the plate tower 2. The flow guiding compartment 4 is located below the oil receiving tray 21. The flow guiding compartment 4 is arranged in two layers, from top to bottom as the first compartment and the second compartment, including a first compartment 41, a second compartment 42, a third compartment 43, and a fourth compartment 44. These four compartments have the same height, width, and thickness. The first compartment 41 is rectangular when viewed from the front. The second compartment 42 has a second flow guiding port 421 at the lower left corner when viewed from the front. The second flow guiding port 421 is rectangular. The third compartment 43 has a third flow guiding port a431 at the upper right corner and a third flow guiding port b432 at the lower right corner when viewed from the front. The third flow guiding port a431 and the third flow guiding port b432 are rectangular. All three flow guide ports b432 are rectangular. The fourth flow guide port 44 is equal in size to the second flow guide port 42 and has a fourth flow guide port 441. The second flow guide port 421 and the third flow guide port a431 are the same size. The first flow guide port 41, the second flow guide port 42, the third flow guide port 43, the fourth flow guide port 44, and the first base plate together form the first partition layer. The inner ends of the four partitions are welded to the central column 25, and the outer ends extend to the inner wall of the tower and are welded thereon. The four partitions divide the corresponding cross-section of the cylindrical tower into four independent sector-shaped segments. The flow guide compartment 4 also includes a fifth flow guide port 45, a sixth flow guide port 46, a seventh flow guide port 47, and an eighth flow guide port 48. These four partitions have the same height, width, and thickness. The fifth flow guide port 45 is [missing information - likely a reference to a specific design or feature]. The first partition is rectangular. Partition 6 (46) has a sixth flow port (461) at its lower left corner when viewed from the front. Partition 7 (47) has a seventh flow port (a471) at its upper right corner and a seventh flow port (b472) at its lower right corner when viewed from the front. Both seventh flow ports (a471 and b472) are rectangular. Partition 8 (48) is identical to partition 6 (46) and has an eighth flow port (481). The sixth flow port (461) and the seventh flow port (a471) are the same size. Partitions 5 (45), 6 (46), 7 (47), and 8 (48), along with the base plate 2, together form the second partition layer, located below the first partition layer. The inner ends of the four partitions are welded to the central column 25. The outer end extends to the inner wall of the tower and is welded. Four partitions divide the corresponding cross-section of the cylindrical tower into four independent sector segments. The partitions of the first and second partitions are arranged in opposite directions. Partition 1 41 is located directly above partition 5 45, partition 2 42 is located directly above partition 8 48, partition 3 43 is located directly above partition 7 47, and partition 44 is located directly above partition 6 46. Partition 1 41 and partition 5 45 are equal, partition 2 42 and partition 6 46 are equal, partition 3 43 and partition 7 47 are equal, and partition 44 and partition 8 48 are equal. This design causes the rapeseed oil to flow in opposite directions in the first and second partitions, which can ensure that the rapeseed oil does not short-circuit. The flow-guiding compartment 4 is located at the bottom of the oil receiving tray 21. The flow-guiding hole 211 of the oil receiving tray 21 is located directly above the fan-shaped grid segment formed by the first partition 41 and the second partition 42. In addition, both the first and second partitions are provided with vents 49 to drain the rapeseed oil in the fan-shaped grid segment.

[0021] The specific work process is as follows: Rapeseed oil is fed into the oil inlet 32 ​​in the middle of the vapor phase outlet cylinder 3 through the oil inlet pipe, and then enters the packed tower 1. Inside the tower, the oil is dispersed into a thin oil film by the packing 54, contacting the rising steam in the plate tower 2 to complete the initial removal of volatile odors. The treated oil falls into the guide compartment 4 through the guide holes 211 of the oil receiving pan 21. It first enters the fan-shaped grid section of the first compartment. After the oil accumulates to the height of the guide port, it flows through the guide ports of the second and third partitions, and then flows into the second compartment below for repeated overflow, extending the contact with the steam. After the contact time with steam, the grease enters the four double-layer plate units of the plate tower 2. It first enters the deodorization chamber 1 231. The Monma pump 24 forces the grease to mix with the steam of the corresponding steam distributor 6. After deep stripping, it flows into the deodorization chamber 2 232 through the overflow pipe 1 2311 for further treatment. Finally, the grease is collected in the collection chamber 233 and discharged from the grease outlet 22 at the bottom of the plate tower 2. The desorbed odor vapor phase is filtered upward through the packing 54 of the packed tower 1 and the vapor phase outlet cylinder 3 and discharged from the vapor phase outlet 31.

[0022] The heat transfer oil jacket 7 plays a temperature control role. The four jackets of the packed tower 1 keep the tower body stably maintained at the pre-deodorization temperature. The two jackets of the plate tower 2 correspond to the deodorization chamber 1 231 and the deodorization chamber 2 232 for precise temperature control, and the temperature is controlled within the range of 200℃-240℃. The oil in the whole tower is always in the optimal temperature range for the volatilization of odor substances and free fatty acids, providing a stable thermal environment for deacidification and deodorization, avoiding excessive acid value and odor residue caused by low temperature. Under the dual action of overflow from the guide compartment 4 and forced mixing by the Monma pump 24, the oil comes into full contact with the steam, efficiently removing free fatty acids and achieving deep deacidification. The vapor phase outlet cylinder 3 and the packing 54 in the packed tower 1 further adsorb residual acidic substances, significantly reducing the acid value of rapeseed oil. Finally, the acid value and odor of the finished oil both meet the high-quality standards.

[0023] The above description is merely an embodiment 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 shall 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 high-efficiency rapeseed oil deacidification and deodorization tower, characterized in that: The system includes a packed tower and a plate tower connected to the lower part of the packed tower. The packed tower and the plate tower are fixedly connected by flanges. The packed tower contains packing and support rings. The outer walls of both the packed tower and the plate tower are fitted with heat transfer oil jackets, which have heat transfer oil inlets and outlets. A vapor phase outlet tube is connected to the top flange of the packed tower. The top of the vapor phase outlet tube has a vapor phase outlet, and the middle of the vapor phase outlet tube has an oil inlet. The bottom of the plate tower has an oil outlet, and the plate tower contains several steam distributors. The top of the plate tower has a flow guide compartment, which is used to guide the flow of oil to ensure the residence time of oil in the tower. The top of the plate tower also has an oil receiving tray, which is located above the flow guide compartment and is used to guide the flow of oil into the flow guide compartment.

2. The deacidification and deodorization tower according to claim 1, characterized in that: The vapor phase outlet tube is also equipped with packing and support rings located below the vapor phase outlet. The support rings are located at the upper and lower ends of the packing and are fixedly connected to the inner wall of the vapor phase outlet tube and the packed tower.

3. The deacidification and deodorization tower according to claim 2, characterized in that: The support ring includes several support plates arranged symmetrically at the center. The support plates have the same height and together form a circular structure, which is fixedly connected to the inner wall of the vapor phase outlet cylinder.

4. The deacidification and deodorization tower according to claim 1, characterized in that: The plate tower has four double-layer plate units arranged side by side along the horizontal direction of the tower body.

5. The deacidification and deodorization tower according to claim 4, characterized in that: Steam distributors are installed at the plate units and at the top of the plate tower. Each plate unit is equipped with a set of Monma pumps. The steam input end of the Monma pumps is connected to the steam distributor to achieve forced mixing and stripping of oil and steam.

6. The deacidification and deodorization tower according to claim 5, characterized in that: Each plate unit is equipped with an overflow pipe, which connects the upper and lower plate units to control the liquid level and guide the flow of grease.

7. The deacidification and deodorization tower according to claim 1, characterized in that: The flow-guiding compartment is designed in two layers. Each layer includes four vertically arranged baffles that extend radially along the tower body. The inner ends of the baffles are connected, and the outer ends extend to the inner wall of the tower body, dividing the corresponding cross-section of the cylindrical tower body into four independent sector segments. At least three of the four baffles in each layer are provided with flow-guiding ports. The flow-guiding ports are opened along the height direction of the baffles. Rapeseed oil flows into the adjacent sector segment through the flow-guiding ports to prolong the contact time between the rapeseed oil and the steam in the tower.

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