Falling film evaporation device for cottonseed oil production

Abstract

The utility model belongs to the technical field of edible oil processing, and particularly discloses a falling film evaporation device for cottonseed oil production, which comprises a barrel, an upper shell arranged on the barrel, an air outlet arranged on the upper shell, a hot oil inlet arranged on the upper shell, a distribution plate arranged in the upper shell, a cold oil inlet arranged on the barrel and a cold oil outlet arranged on the barrel. The cold oil inlet is located below the cold oil outlet, an upper tube plate and a lower tube plate are arranged in the barrel, a heat exchange tube is arranged in the barrel, the upper end of the heat exchange tube is fixedly connected with the upper tube plate, the lower end of the heat exchange tube is fixedly connected with the lower tube plate, a plurality of baffle plates are arranged on the inner wall of the barrel, a plurality of pull rods are arranged on the lower tube plate, and the upper ends of the pull rods are connected with one baffle plate. A pipe spacer is arranged between every two adjacent baffle plates, a lower shell is arranged on the barrel, and a hot oil outlet is formed in the lower shell. The falling film evaporation and cooling device has the advantages that the working efficiency in the falling film evaporation and cooling process is improved, a device for cooling heated steam is not needed, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of edible oil processing, in particular to a falling film evaporation device for cottonseed oil production. Background Art

[0002] Falling film evaporator is widely used in liquid evaporation and concentration and waste liquid treatment in the fields of medicine, food, chemical industry, environmental protection, etc. Evaporation is a heating method that partially vaporizes and removes the volatile solvent in the solution under boiling state. Falling film evaporator is widely used for heat-sensitive solutions.

[0003] A falling film evaporator disclosed in a Chinese utility model patent with announcement number CN217246797U and application number CN202220147604.9 includes a cylinder, a uniformly distributed positioning guide rod is arranged in the cylinder, a small liquid distributor is uniformly distributed on the positioning guide rod, a large liquid distributor is uniformly distributed on the outer wall of the positioning guide rod, a distillation port is fixedly connected through the center of the upper surface of the upper head, an exhaust valve is fixedly connected to the upper head, and a pressure detection point is fixedly connected through the upper head. Filling of materials into the cylinder is completed through the feed port, the pressure detection point detects the pressure in the cylinder, and the evaporation of the material is observed from the sight glass. The temperature of the material in the cylinder is detected through the material temperature detection point.

[0004] However, the falling film evaporator in the above patent still has the following problems during use: lack of condensing agent channel or other cooling material structure, and inability to achieve cooling of the deacidified oil after evaporation in the same device. Utility Model Content

[0005] The utility model aims to provide a falling film evaporator for cottonseed oil production, so as to solve the problem that the above patent lacks a condensing agent channel or other cooling material structure, and the cooling of the deacidified oil after evaporation cannot be achieved in the same device.

[0006] In order to achieve the above-mentioned purpose, the basic scheme provided by the utility model is: a falling film evaporation device for cottonseed oil production, including a cylinder, an upper shell body is provided on the cylinder, an air outlet is provided on the upper shell body, a hot oil inlet is provided on the upper shell body, a distribution plate is provided in the upper shell body, a cold oil inlet and a cold oil outlet are provided on the cylinder body, and the cold oil inlet is located below the cold oil outlet, an upper tube plate and a lower tube plate are provided in the cylinder body, a heat exchange tube is provided in the cylinder body, the upper end of the heat exchange tube is fixedly connected to the upper tube plate, and the lower end is fixedly connected to the lower tube plate, a plurality of baffles are provided on the inner wall of the cylinder body, a plurality of pull rods are provided on the lower tube plate, the upper ends of the plurality of pull rods are connected to a baffle, a distance tube is provided between adjacent baffles, a lower shell body is provided on the cylinder body, and a hot oil outlet is provided on the lower shell body.

[0007] The principle and beneficial effect of the utility model are as follows: the cold oil to be evaporated and heated is poured in through the cold oil inlet, flows through each baffle from bottom to top, and poured into the distribution plate through the hot oil inlet, flows into a number of heat exchange tubes connected to the distribution plate, heats and evaporates the cold oil in the cylinder, disperses the cold oil in the barrel through the pull rod, increases the heat transfer effect, and after the hot oil heats and evaporates the cold oil, the cold oil enters to cool the steam generated by evaporation, separates the gas and liquid, and the concentrated liquid phase flows into the lower shell and is discharged from the hot oil port. The working efficiency in the falling film evaporation and cooling process is improved, and there is no need to build additional equipment to cool the heated steam, saving costs.

[0008] Solution 2, which is the preferred basic solution, is provided with an antioxidant inlet on the lower shell, and antioxidants are added to the liquid phase flowing into the lower shell to prevent oxidation of the liquid phase and improve the quality of the liquid phase.

[0009] Option 3 is the preferred option of Option 2. A liquid level meter is provided on the lower shell to measure the liquid level in the lower shell with high precision, ensuring that the liquid level is controlled within a safe and efficient range.

[0010] Option 4 is the preferred option of Option 3. An expansion joint is provided on the barrel. During the heating process, the pressure inside the barrel changes. The expansion joint is provided to gather the pressure inside the barrel at the expansion joint, reduce the pressure expansion over a large area, and avoid leakage and deformation of the barrel due to changes in temperature and pressure.

[0011] Scheme 5 is the preferred option of Scheme 4. The cylinder is provided with an exhaust port and a vent port, which is lower than the exhaust port. The evaporated steam floats on the upper layer and is discharged through the exhaust port. The vent port discharges the pressurized gas or liquid when not working or in an emergency to avoid other accidents.

[0012] Option 6 is the preferred option of Option 5. A steam inlet pipe is provided outside the lower shell, a steam branch pipe is provided inside the lower shell, the steam inlet pipe and one end of the steam branch pipe are connected through, and the other end of the steam branch pipe is connected to a mammoth pump. Steam enters the steam branch pipe from the steam inlet pipe, and emerges into the lower cylinder through the mammoth pump, which plays a role in churning the oil and preventing the oil from solidifying.

[0013] Solution 7, which is a preferred solution of Solution 6, has ear seats on the outer wall of the cylinder. The ear seats can stably place the evaporator in the desired position, thus supporting and fixing the entire device.

[0014] Scheme 8, which is the preferred embodiment of Scheme 7, is provided with an upper head on the upper shell, which is flange-connected to the upper head, and a plate-type lifting lug is provided on the upper head. When the internal structure needs to be inspected or corrected, the upper head can be lifted from the upper shell from the flange connection through the plate-type lifting lug, exposing the internal structure, which is convenient for the inspection and correction of the inside of the cylinder.

[0015] Scheme 9, which is the preferred embodiment of Scheme 8, is provided with a sight glass on the upper shell and a manhole on the lower shell. The sight glass on the upper shell facilitates observation of the upper shell and the components in the cylinder from above through the sight glass, and the manhole on the lower shell provides a passage for the staff to enter the lower shell for equipment maintenance and cleaning, and can also observe and monitor the operation of the liquid phase in the lower shell from the outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a top view of an oil falling film evaporation device for cottonseed oil production according to the utility model;

[0017] Figure 2 yes Figure 1 Section view along line AA. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below through specific implementation methods:

[0019] The figure marks in the drawings of the specification include: 1. cylinder, 2. upper shell, 3. upper head, 4. lower shell, 5. distribution plate, 6. hot oil inlet, 7. heat exchange tube, 8. air outlet, 9. plate lifting ear, 10. sight glass, 11. cold oil outlet, 12. exhaust port, 13. upper tube sheet, 14. expansion joint, 15. baffle, 16. pull rod, 17. ear seat, 18. vent, 19. cold oil inlet, 20. lower tube sheet, 21. manhole, 22. antioxidant inlet, 23. steam inlet pipe, 24. liquid level meter, 25. hot oil outlet, 26. fixed distance pipe, 27. mammoth pump, 28. steam branch pipe.

[0020] Example

[0021] The embodiment is basically as shown in the attached Figure 1 To Attachment Figure 2As shown: A falling film evaporation device for cottonseed oil production includes a cylinder 1, an upper shell 2 is provided on the cylinder 1, an air outlet 8 is provided on the upper shell 2, an upper head 3 is provided on the upper shell 2, the upper shell 2 and the upper head 3 are flange-connected, a plate-type lifting lug 9 is provided on the upper shell 2, a hot oil inlet 6 is provided on the upper shell 2, a distribution plate 5 is provided in the upper shell 2, a cold oil inlet 19 and a cold oil outlet 11 are provided on the cylinder 1, the cold oil inlet 19 is located below the cold oil outlet 11, an upper tube sheet 13 and a lower tube sheet 20 are provided in the cylinder 1, a heat exchange tube 7 is provided in the cylinder 1, the upper end of the heat exchange tube 7 is fixedly connected to the upper tube sheet 13, and the lower end is fixedly connected to the lower tube sheet 20, a plurality of baffles 15 are provided on the inner wall of the cylinder 1, and a plurality of pull rods 16 are provided on the lower tube sheet 20. A baffle 15 is connected to the upper end of the dry pull rod 16, and a distance tube 26 is provided between adjacent baffles 15, an expansion joint 14 is provided on the cylinder 1, an ear seat 17 is provided on the outer wall of the cylinder 1, an exhaust port 12 is provided on the cylinder 1, a vent 18 is provided on the cylinder 1, and the vent 18 is lower than the exhaust port 12, a lower shell 4 is provided on the cylinder 1, an antioxidant inlet 22 is provided on the lower shell 4, a liquid level gauge 24 is provided on the lower shell 4, a steam inlet pipe 23 is provided outside the lower shell 4, a steam branch pipe 28 is provided inside the lower shell 1, the steam inlet pipe 23 and one end of the steam branch pipe 28 are connected through, and the other end of the steam branch pipe 28 is connected to a mammoth pump 27, a sight glass 10 is provided on the upper shell 2, a manhole 21 is provided on the lower shell 4, and a hot oil outlet 25 is provided on the lower shell 4.

[0022] The specific implementation process of this embodiment is as follows:

[0023] 1. During falling film evaporation, hot oil is poured into the upper shell 2 from the hot oil inlet 6, and the oil is evenly distributed to each heat exchange tube 7 through the distribution plate 5. Under the action of gravity and vacuum, the hot oil forms a uniform film in the heat exchange tube 7 and flows downward; at the same time, cold oil is poured into the cold oil inlet 19, and the poured cold oil flows from bottom to top through a number of baffles 15, and exchanges heat with the steam generated by the hot oil in the heat exchange tube 7 to reduce the temperature of the steam. The cooled steam is discharged from the exhaust port 12 on the cylinder 1 until the cold oil rises to the cold oil outlet 11 and is discharged outward. The film-forming oil in the heat exchange tube 7 is heated. After evaporation, it is concentrated and continues to flow downward to the lower shell 4. Then the staff monitors the changes in the liquid level height in the lower shell 4 through the liquid level meter 24, adjusts the oil intake according to the liquid level data, and then adds antioxidants to the liquid phase through the antioxidant inlet 22 to prevent liquid phase oxidation. At the same time, steam is input from the steam branch pipe 28, and the steam is ejected through the mammoth pump 27, which has a churning effect on the liquid phase added with the oxidant in the lower shell 4, so that the antioxidant is evenly distributed in the liquid phase. Finally, the processed liquid phase flows out through the hot oil outlet 25, and the steam generated after heating in the evaporator floats to the upper shell and is discharged from the air outlet 8.

[0024] 2. When observing the internal operation of the evaporator, the flow of the internal liquid can be observed from the sight glass 10 on the upper shell 2 and the manhole 21 on the lower shell 4; when it is necessary to inspect and clean the inside of the evaporator, the staff opens the cover of the manhole 21 on the lower shell 4 and enters the interior from the channel inside the evaporator to perform equipment maintenance, inspection and cleaning.

[0025] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A falling film evaporator for cottonseed oil production, characterized in that: The invention comprises a cylinder (1), wherein an upper shell (2) is provided on the cylinder (1), an air outlet (8) is provided on the upper shell (2), a hot oil inlet (6) is provided on the upper shell (2), a distribution plate (5) is provided in the upper shell (2), a cold oil inlet (19) and a cold oil outlet (11) are provided on the cylinder (1), the cold oil inlet (19) is located below the cold oil outlet (11), an upper tube sheet (13) and a lower tube sheet (20) are provided in the cylinder (1), and a heat exchanger (1) is provided in the cylinder (1). Tube (7), the upper end of the heat exchange tube (7) is fixedly connected to the upper tube plate (13), and the lower end is fixedly connected to the lower tube plate (20), the inner wall of the cylinder (1) is provided with a plurality of baffles (15), the lower tube plate (20) is provided with a plurality of tie rods (16), the upper ends of a plurality of tie rods (16) are connected to a baffle (15), and a spacing tube (26) is provided between adjacent baffles (15), the cylinder (1) is provided with a lower shell (4), and the lower shell (4) is provided with a hot oil outlet (25).

2. A falling film evaporator for cottonseed oil production according to claim 1, characterized in that: The lower shell (4) is provided with an antioxidant inlet (22).

3. A falling film evaporator for cottonseed oil production according to claim 2, characterized in that: The lower housing (4) is provided with a liquid level meter (24).

4. A falling film evaporator for cottonseed oil production according to claim 3, characterized in that: The cylinder (1) is provided with an expansion joint (14).

5. A falling film evaporator for cottonseed oil production according to claim 4, characterized in that: The cylinder (1) is provided with a venting port (18), the cylinder (1) is provided with an exhaust port (12), and the venting port (18) is lower than the exhaust port (12).

6. A falling film evaporator for cottonseed oil production according to claim 5, characterized in that: A steam inlet pipe (23) is provided outside the lower shell (4), and a steam branch pipe (28) is provided inside the lower shell (4). The steam inlet pipe (23) and one end of the steam branch pipe (28) are connected through each other, and the other end of the steam branch pipe (28) is connected to a mammoth pump (27).

7. A falling film evaporation device for cottonseed oil production according to claim 6, characterized in that: The outer wall of the cylinder (1) is provided with an ear seat (17).

8. A falling film evaporation device for cottonseed oil production according to claim 7, characterized in that: An upper head (3) is provided on the upper shell (2), the upper shell (2) and the upper head (3) are flange-connected, and a plate-type lifting lug (9) is provided on the upper head (3).

9. A falling film evaporator for cottonseed oil production according to claim 8, characterized in that: The upper shell (2) is provided with a sight glass (10), and the lower shell (4) is provided with a manhole (21).

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