Negative pressure desolventizing system for leaching section of leacher
By introducing a negative pressure desolution system in the drain section of the leaching device, the solvent is separated by pressure differential separation, the problem of high steam and solvent consumption in the grease preparation factory is solved, the recycling of solvents and the reduction of steam consumption is achieved, and the separation is improved efficiency.
Patent Information
- Application Number
- CN202323111507.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-17
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2033-11-17
AI Technical Summary
The leaching production line of the grease production plant is consumed too high during the desolation process, resulting in a large offline load and serious solvent loss.
The negative pressure desolution system of the drain section of the leacher is used to change the natural drainage process to negative pressure drainage. Use differential pressure to separate the solvent, set up a Roots fan, a liquid cyclone, a solvent buffer tank and a circulation pump to achieve the solvent Reduction in recycling and steam consumption.
It effectively reduces the solvent content in the wet meal, reduces steam consumption and solvent loss, improves the separation efficiency between solvent and leaching embryos, and reduces the load on the offline.
Smart Images
Figure CN222139035U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a desolventizing system for a draining section of an extractor, in particular to a negative pressure desolventizing system for a draining section of an extractor, and belongs to the technical field of extractors. Background Art
[0002] In the production process of the extraction production line of the oil production factory, the material becomes wet meal after extraction in the extractor. Before being discharged from the extractor, it is drained by the natural draining section to drain the solvent. The wet meal after drainage contains about 30% of the solvent. The wet meal enters the degassing machine through the wet meal scraper for desolventizing and steaming. In the degassing machine, steam is used to remove 30% of the solvent in the wet meal. The degassing machine has a large load, requires a large amount of steam, and has a high solvent consumption. Utility Model Content
[0003] In view of the above facts, in order to solve the problem of high steam and solvent consumption, the utility model further designs a negative pressure desolventizing system for the extraction section. The utility model changes the existing natural desolventizing process into negative pressure desolventizing, reduces the solvent content in the wet meal by 5%, and recycles the solvent, effectively reducing the steam consumption and solvent loss in the process of desolventizing the material.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A negative pressure desolventizing system for a draining section of an extractor comprises an extractor body, a return oil hopper and a draining oil hopper are respectively arranged below the leaching section of the extractor body, and the side wall of the return oil hopper and the side wall of the draining oil hopper are connected through a connecting pipe;
[0006] A grating supporting the material layer is provided at the material outlet end of the oil drain hopper;
[0007] A vacuum pipe joint is installed on the side wall of the oil drain hopper, the air outlet flange end of the vacuum pipe joint is connected to the upper part of the hydrocyclone separator through an air extraction pipeline, the top of the hydrocyclone separator is connected to the inlet end of the Roots blower through a first pipeline, and the outlet end of the Roots blower is connected to the air distribution pipe arranged above the material layer through an air outlet pipe;
[0008] The liquid outlet of the oil drain hopper is connected to the liquid inlet of the solvent buffer tank, the liquid outlet of the solvent buffer tank is connected to the spray assembly arranged above the material layer through a second pipeline, a circulating pump is arranged on the second pipeline, and the liquid outlet end of the cyclone separator is connected to the liquid outlet of the solvent buffer tank through a cyclone separator reflux pipe.
[0009] Furthermore: a pressure sensor is provided on the first pipeline, and the function of the pressure sensor is to obtain vacuum data in the pipeline, so as to facilitate the control room to monitor the field data.
[0010] Furthermore, the vacuum pipe joint is provided with a cleaning port, which is used to clean the powder accumulated in the vacuum pipe joint.
[0011] Furthermore, a grid-shaped reinforcement rib is arranged on the lower outer wall of the oil drain hopper, which is used to prevent the oil drain hopper from being sunken due to the internal tension formed by the vacuum.
[0012] Furthermore, an inverted U-shaped elbow is provided on the horizontal section of the cyclone separator return pipe, and the height of the U-shaped elbow is 1000 mm, which is used to prevent vacuum pressure relief when there is insufficient liquid in the circulation pump.
[0013] Furthermore, the inlet and outlet ends of the Roots blower are both provided with silencers, which eliminates most of the noise generated by the Roots blower during operation.
[0014] Furthermore, a short-circuit prevention plate is provided at the front end of the top of the drain oil hopper, and the short-circuit prevention plate is located at the lower part of the grid plate. Its function is to prevent the gas from being directly drawn in from the blanking port when the drain oil hopper is vacuumed, so as to avoid gas short circuit affecting the vacuum degree.
[0015] Furthermore, a partition is provided at the rear end of the top of the oil draining bucket, and the partition is located at the lower part of the grid plate. Its function is to work together with the anti-short circuit plate to make the gas pass through the material layer in a concentrated manner during the vacuuming process.
[0016] Furthermore, a continuous liquid level sensor is provided on the solvent buffer tank, which is used to obtain the liquid level information in the solvent buffer tank and ensure the stability of the liquid level in the solvent buffer tank.
[0017] Furthermore, an oil hopper inter-stack plate is provided at the intersection of the two oil hopper slopes between the drain oil hopper and the return oil hopper, and its function is to separate the drain oil hopper from the return oil hopper, so that the drain oil hopper becomes an independent cavity.
[0018] The effects achieved by the utility model are:
[0019] The utility model discloses a negative pressure desolventizing system for the draining section of an extractor, which utilizes the effect of pressure difference to strengthen the separation of solvent and leaching embryo, thereby improving the separation efficiency; the content of solvent in wet meal after leaching can be reduced by 5%; the steam consumption in the leaching embryo desolventizing process is effectively reduced, thereby reducing the solvent consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of a negative pressure desolventizing system of a draining section of an extractor of the utility model;
[0021] Figure 2 A three-dimensional diagram of the oil drain bucket;
[0022] Figure 3 A perspective view of a vacuum pipe joint.
[0023] Among them: 1. Roots blower; 2. cyclone separator; 3. solvent buffer tank; 4. continuous liquid level sensor; 5. vacuum pipe joint; 6. circulation pump; 7. connecting pipe; 8. pressure sensor; 9. silencer; 10. vertical plate between oil hoppers; 11. partition; 12. anti-short circuit plate; 13. air distribution pipe; 14. extractor shell; 15. grid-shaped reinforcement ribs; 16. air outlet pipe; 17. material layer; 18. exhaust pipe; 19. cyclone separator return pipe; 19-1. U-shaped bend pipe; 20. flushing pipe; 21. drain oil hopper; 22. sight glass; 23. liquid outlet blind plate; 24. liquid outlet; 25. grid plate; 26. reflux oil hopper; 27. first pipeline; 28. second pipeline; 29. spray assembly. DETAILED DESCRIPTION
[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.
[0025] The terms "disposed", "connected" and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.
[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figure 1 and Figure 2 The present application is described in detail with reference to embodiments.
[0027] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0028] Example: See Figure 1 and Figure 2, a negative pressure desolventizing system for the draining section of an extractor of the present embodiment comprises an extractor body 14, a reflux oil hopper 26 and a draining oil hopper 21 are respectively provided below the leaching section of the extractor body 14, the side wall of the reflux oil hopper 26 and the side wall of the draining oil hopper 21 are connected by a connecting pipe 7; the connecting pipe 7 is made of stainless steel SS304, the connecting pipe 7 is inclined, and is located at a lower side of the reflux oil hopper 26, and its function is that if the liquid level of the draining oil hopper 21 is higher than the warning liquid level, the liquid will enter the reflux oil hopper 26 through it;
[0029] The drain oil hopper 21 is an independent cavity, and a grating 25 for supporting the material layer 17 is provided at the discharge port end of the drain oil hopper 21. The grating 25 is made of stainless steel SS304, and the gap between the grating strips is 6-12mm. The function of the grating 25 is to support the material layer 17, and the solvent in the material layer 17 enters the drain oil hopper 21 through the gap; a grid-shaped reinforcing rib 15 is provided on the lower outer wall of the drain oil hopper 21, and its function is to prevent the drain oil hopper 21 from sinking due to the internal tension formed by the vacuum. The grid-shaped reinforcing rib 15 is made of SS304 stainless steel, with a thickness of 12mm and a width of 60mm, and is welded on the lower outer wall of the drain oil hopper 21 in a grid shape; A flushing pipe 20 is arranged inside the drain hopper 21, and a plurality of flushing spray ports are distributed along the length direction of the flushing pipe 20. Both ends of the flushing pipe 20 extend out of the drain oil hopper. The function of the flushing pipe 20 is to blow away the powder in the material layer 17 on the side wall of the drain oil hopper 21 through the grid plate 25; a sight glass 22 is arranged below the grid plate 25 on the drain oil hopper 21, and the function of the sight glass 22 is to observe the production status in the drain oil hopper 21; a liquid outlet 24 is arranged at the lowest point of the bottom of the drain oil hopper 21 as the solvent outlet of the drain oil hopper 21; a liquid outlet blind plate 23 is arranged on the side of the liquid outlet 24, and the function of the liquid outlet blind plate 23 is to facilitate the cleaning of the powder accumulated at the lowest point of the bottom of the drain oil hopper 21;
[0030] A vacuum pipe joint 5 is installed on the side wall of the drain oil bucket 21. The vacuum pipe joint 5 is square and the outer port is round. The outlet flange end of the vacuum pipe joint 5 is connected to the upper part of the hydrocyclone 2 through the exhaust pipe 18, and its function is to collect gas entering the exhaust pipe 18; the vacuum pipe joint 5 is provided with a cleaning port 5-1, and its function is to clean the powder accumulated in the vacuum pipe joint; the top of the hydrocyclone 2 is connected to the inlet end of the Roots blower 1 through the first pipeline 27, and the outlet end of the Roots blower 1 is connected to the air distribution pipe 13 arranged above the material layer 17 through the air outlet pipe 16; the material of the air distribution pipe 13 is stainless steel SS304, and its outlet enters the extractor body 400mm, and its nozzle position is slightly bent downward to ensure that the blown gas can be concentrated on the material layer 17. The function of the air distribution pipe 13 is to blow the gas extracted from the drain oil bucket 21 by the Roots blower 1 back to the material layer 17 in the extractor body 14;
[0031] The liquid outlet 24 of the oil drain hopper 21 is connected to the liquid inlet of the solvent buffer tank 3 by flange means. The liquid outlet of the solvent buffer tank 3 is connected to the spray assembly 29 arranged above the material layer 17 through the second pipe 28. The second pipe 28 is provided with a circulation pump 6. The liquid outlet end of the hydrocyclone separator 2 is connected to the liquid outlet of the solvent buffer tank 3 through the hydrocyclone separator reflux pipe 19. The material of the solvent buffer tank 3 is stainless steel SS304, with a diameter of 800mm and a height of 1000mm. The size can be determined according to the actual space on site. Its function is to form a certain liquid level on the upper part of the circulation pump 6 to ensure the stable flow of the circulation pump 6.
[0032] More specifically: a pressure sensor 8 is provided on the first pipeline 27 .
[0033] More specifically: an inverted U-shaped bend 19 - 1 is provided on the horizontal section of the hydrocyclone separator reflux pipe 19 , and the height of the U-shaped bend 19 - 1 is 1000 mm.
[0034] More specifically, the inlet and outlet ends of the Roots blower 1 are both provided with a muffler 9 , and the muffler 9 is made of stainless steel SS304.
[0035] More specifically: an anti-short circuit plate 12 is provided at the front end of the top of the oil drain hopper 21, and the anti-short circuit plate 12 is located at the lower part of the grid plate 25. The short circuit plate 12 is made of stainless steel SS304, with a thickness of 8mm, a width of 800mm, and a length consistent with the width of the oil drain hopper 21.
[0036] More specifically: a partition 11 is provided at the rear end of the top of the oil drain hopper 21, and the partition 11 is located at the lower part of the grid 25. The material of the partition 11 is stainless steel SS304, with a thickness of 8mm, a width of 800mm, and a length consistent with the width of the oil drain hopper 21.
[0037] More specifically: a continuous liquid level sensor 4 is provided on the front of the solvent buffer tank 3, and the internal liquid level signal of the continuous liquid level sensor 4 is interlocked with the frequency of the circulation pump 6. Further: an oil hopper inter-stack plate 10 made of SS304 is provided at the intersection of the two oil hopper slopes between the drain oil hopper 21 and the return oil hopper 26.
[0038] More specifically: the function of the Roots blower 1 is to draw out a vacuum from the drain oil bucket 21, so that the vacuum of the drain oil bucket 21 drives the solvent contained in the material layer 17 to accelerate and fall into the drain oil bucket 21. The Roots blower 1 is a variable frequency vacuum blower, which is an explosion-proof blower specially used in the chemical industry, and its rotation speed can be adjusted according to the negative pressure value displayed by the pressure sensor 8. The main body is made of stainless steel alloy, which has high corrosion resistance and is less likely to generate static electricity than a centrifugal blower. The motor of the Roots blower 1 is an explosion-proof motor, and the blades are made of SS304 stainless steel. The gear box of the Roots blower 1 is connected to a circulating water pipeline for cooling the gear box.
[0039] The working process of this embodiment:
[0040] A negative pressure desolventizing system for the draining section of an extractor adopts vacuum forced draining. When working, a Roots blower 1 draws out the mixed gas in the drain oil hopper 21 through a vacuum pipe joint 5, so that a negative pressure zone of about -5 kPa is formed in the drain oil hopper 21. Under the action of the negative pressure in the drain oil hopper 21, the solvent and solvent gas in the material layer 17 pass through a grid plate 25 and fall into the drain oil hopper 21 by utilizing the pressure difference principle. The solvent is drawn out through a circulation pump 6 and flows back to the material layer. After the drawn solvent mixed gas is separated by a hydrocyclone 2, the liquid flows back to the circulation pump 6 through a cyclone reflux pipe 19 below. The gas is blown into the space above the material layer 17 through the Roots blower 1 and the air outlet pipe 16. In this way, the solvent content in the wet meal in the material layer 17 is reduced from 30% to less than 25%.
[0041] A negative pressure desolventizing system for the draining section of an extractor can reduce the solvent content in wet meal by 5% after leaching; the solvent content in the wet meal is reduced, and steam consumption can be reduced during desolventizing in the desolventizing section, and the unit steam consumption of the material can be reduced by 6 to 10 kg / ton. Since the negative pressure of the draining oil hopper 21 and the mixed gas are blown above the material layer 17, this process belongs to gas self-circulation, and the pressure does not change significantly relative to the inside of the extractor body, forming a closed circulation system. This process strengthens the separation of the solvent and the leaching embryo, effectively reduces the loss of solvent and the amount of steam used in the desolventizing process of the leaching embryo, and greatly reduces the load of the desolventizer.
[0042] The utility model also has the advantages of: first, no condenser is required for condensation; second, the extracted mixed gas does not require special equipment for desolventizing and recycling; third, less materials are required and the cost is low.
[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some or all of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A negative pressure desolventizing system for the draining section of an extractor, characterized in that: The invention comprises an extractor body (14), wherein a return oil hopper (26) and a drain oil hopper (21) are respectively arranged below the leaching section of the extractor body (14), and the side wall of the return oil hopper (26) and the side wall of the drain oil hopper (21) are connected via a connecting pipe (7); A grating plate (25) for supporting the material layer (17) is provided at the material outlet end of the oil drain bucket (21); A vacuum pipe joint (5) is installed on the side wall of the oil drain bucket (21); the outlet flange end of the vacuum pipe joint (5) is connected to the upper part of the hydrocyclone (2) through an exhaust pipe (18); the top of the hydrocyclone (2) is connected to the inlet end of the Roots blower (1) through a first pipe (27); the outlet end of the Roots blower (1) is connected to the air distribution pipe (13) arranged above the material layer (17) through an air outlet pipe (16); The liquid outlet (24) of the oil drain bucket (21) is connected to the liquid inlet of the solvent buffer tank (3), the liquid outlet of the solvent buffer tank (3) is connected to a spray assembly (29) arranged above the material layer (17) through a second pipeline (28), a circulation pump (6) is arranged on the second pipeline (28), and the liquid outlet end of the hydrocyclone (2) is connected to the liquid outlet of the solvent buffer tank (3) through a hydrocyclone reflux pipe (19).
2. A negative pressure desolventizing system for the draining section of a leacher according to claim 1, characterized in that: A pressure sensor (8) is provided on the first pipeline (27).
3. A negative pressure desolventizing system for the draining section of a leacher according to claim 1, characterized in that: The vacuum pipe joint (5) is provided with a cleaning port (5-1).
4. A negative pressure desolventizing system for the draining section of a leacher according to claim 1, characterized in that: A grid-shaped reinforcing rib (15) is provided on the lower outer wall of the oil drain bucket (21).
5. The negative pressure desolventizing system for the draining section of the extractor according to claim 1, characterized in that: An inverted U-shaped bend (19-1) is provided on the horizontal section of the cyclone separator return pipe (19), and the height of the U-shaped bend (19-1) is 1000 mm.
6. The negative pressure desolventizing system for the draining section of the extractor according to claim 1, characterized in that: The inlet and outlet ends of the Roots blower (1) are both provided with silencers (9).
7. The negative pressure desolventizing system for the draining section of the extractor according to claim 1, characterized in that: The top front end of the oil drain bucket (21) is provided with an anti-short circuit plate (12), and the anti-short circuit plate (12) is located at the lower part of the grid plate (25).
8. A negative pressure desolventizing system for the draining section of a leacher according to claim 7, characterized in that: A partition plate (11) is provided at the rear end of the top of the oil drain hopper (21), and the partition plate (11) is located below the grid plate (25).
9. The negative pressure desolventizing system for the draining section of the extractor according to claim 1, characterized in that: The solvent buffer tank (3) is provided with a continuous liquid level sensor (4).
10. A negative pressure desolventizing system for the draining section of an extractor according to any one of claims 1 to 9, characterized in that: An oil hopper inter-sump stand (10) is provided at the intersection of the two oil hopper slopes between the drain oil hopper (21) and the return oil hopper (26).