Heating device for dephenolized cottonseed extraction process and negative pressure flash evaporation desolventizing method

Abstract

The invention discloses a dephenolized cottonseed extraction process heating device and a negative pressure flash evaporation desolventizing method, and relates to the technical field of cottonseed oil refining and cottonseed dephenolized protein extraction product.The dephenolized cottonseed extraction process heating device comprises a one-way sleeve heater, and the one-way sleeve heater is communicated with a negative pressure flash evaporation device through a pipeline; the negative pressure flash tank is communicated with the demister type gas-liquid separator through a pipeline, and the demister type gas-liquid separator is respectively communicated with the receiving tank and the condenser through pipelines. According to the heating device for the dephenolized cottonseed extraction process and the negative pressure flash evaporation desolventizing method, materials are heated in the conveying and flowing process, the problems that in a traditional heating mode, saponin and waste liquid are thick and block equipment, and the production efficiency is low are solved, meanwhile, a negative pressure system is combined with a despumation separator and a multi-stage separator, and the production efficiency is improved. The problems that in the cottonseed oil mixed oil refining and dephenolized cottonseed protein processing processes, saponin and waste liquid are prone to foaming and flooding during desolvation, high-temperature saponin cannot be achieved, and residual solvent in waste liquid is high are solved.

Description

Technical Field

[0001] The invention relates to the technical field of cottonseed oil refining and cottonseed dephenolization protein extraction production, in particular to a heating device for dephenolization cottonseed extraction process and a negative pressure flash desolventizing method. Background Art

[0002] In the process of cottonseed oil refining and cottonseed dephenolization protein extraction, soap nuts and waste liquid are produced. The soap nuts and waste liquid contain a large amount of solvents that can be recycled and reused. However, soap nuts and waste liquid are prone to foaming and overflowing in the tank when using conventional heating desolventizing, and concentrated heating makes them viscous and easy to clog, affecting the desolventizing effect;

[0003] Therefore, how to recycle the solvents in saponins and waste liquids, reduce enterprise production costs, reduce emissions and protect the environment has become a difficult problem in the refining of cottonseed oil mixed oil and the dephenolization of cottonseed protein processing. Therefore, a heating device for the dephenolization cottonseed extraction process and a negative pressure flash desolventizing method are proposed.

[0004] Current:

[0005] 1. The traditional scraper evaporator of the traditional heating device has a large driving power (minimum 18.5KW), consumes a lot of electricity and steam, and has low production efficiency;

[0006] 2. The traditional heating method of the traditional heating device causes the soap nuts and waste liquid to become thick and clog the equipment, resulting in low production efficiency;

[0007] 3. The traditional negative pressure flash desolventizing method is easy to foam and overflow in the desolventizing process of saponins and waste liquid during the cottonseed oil mixed oil refining and dephenolization cottonseed protein processing. It cannot heat saponins and has high residual solvent in the waste liquid.

[0008] 4. The traditional heating method of the traditional heating device causes the soap nuts and waste liquid to become viscous and clog the equipment, resulting in low production efficiency. Summary of the invention

[0009] In view of the deficiencies in the prior art, the present invention provides a heating device for dephenolizing cottonseed extraction process and a negative pressure flash desolventizing method, which solve the problems raised in the above-mentioned background technology.

[0010] To achieve the above objectives, the present invention is implemented through the following technical scheme: a heating device for a dephenolized cottonseed extraction process, comprising a one-way sleeve heater, the one-way sleeve heater is connected to a negative pressure flasher through a pipeline, the negative pressure flasher is connected to a frothing gas-liquid separator through a pipeline, the frothing gas-liquid separator is respectively connected to a receiving tank and a condenser through pipelines, the condenser is respectively connected to a secondary separator and a condensate receiving tank through pipelines, the one-way sleeve heater is connected to a feeding pump through a pipeline, and a temperature sensor and a pneumatic automatic control valve are installed on the outside of the one-way sleeve heater.

[0011] Optionally, the receiving tank is connected to a screw pump via a pipeline, and the one-way casing heater is respectively connected to a feeding pump and a screw pump via pipelines.

[0012] Optionally, the negative pressure flasher is connected to the receiving tank through a pipeline.

[0013] Optionally, the condenser is connected to the condensate receiving tank through a pipeline.

[0014] Optionally, the secondary separator is connected to a water ring vacuum pump via a pipeline, and the condensate receiving tank is connected to a shielded pump via a pipeline.

[0015] A negative pressure flash desolventizing method for dephenolizing cottonseed during extraction process comprises the following specific steps:

[0016] Step 1: Material heating, the specific steps are as follows:

[0017] (1) The solvent contained in the sapodilla and waste liquid produced during the cottonseed oil mixed oil refining and dephenolization cottonseed protein processing is transported into a one-way sleeve heater through a feeding pump;

[0018] (2) The one-way casing heater is connected to steam, and the steam entry is controlled by a pneumatic automatic valve. The desolventizing temperature of the soap locust and waste liquid is set to 80-85°C, the material input amount and the discharge temperature are adjusted, and the heated material enters the negative pressure flasher;

[0019] Step 2: Material processing, the specific steps are as follows:

[0020] (1) When the material in the negative pressure flasher has poor flash desolventizing effect, it is circulated through a screw pump into a one-way casing heater and a negative pressure flasher for desolventizing until the residual solvent in the soap locust and waste liquid is completely removed;

[0021] (2) After the solvent is removed, the saponins and waste liquid enter the receiving tank and are transported to the saponin pool or waste liquid pool through a screw pump;

[0022] Step 3: Material separation, when the flashed solvent vapor enters the foam-breaking gas-liquid separator, after foam-breaking gas-liquid separation, the liquid enters the receiving tank and the solvent vapor enters the condenser;

[0023] Step 4: The material is condensed. The solvent condensed by the condenser enters the condensate receiving tank, and is transported by the shielded pump for water separation and then recycled. The non-condensable gas in the condenser enters the secondary separator for gas-liquid separation, and the liquid enters the condensate receiving tank. The gas enters the matching balance tank through the exhaust port of the water ring vacuum pump, and then passes through the final condenser and is absorbed by the water absorption tower and discharged to the outside.

[0024] Optionally, the feed pump has a head of 53-57m and a flow rate of 13-17m3 / h feeding pump.

[0025] Optionally, during the material heating process, the discharge temperature of the soap nuts and waste liquid desolventizing treatment is monitored by a temperature sensor and interlocked with a pneumatic automatic control valve. After the temperature is set, the amount of steam inlet can be adjusted automatically.

[0026] Optionally, the circulation tube bundle of the one-way shell and tube heater is connected to the heater body by a flange, and circulation tube bundles of different lengths can be used according to production requirements.

[0027] Optionally, the waste liquid after the solvent is removed is used as the stock liquid for extracting raffinose.

[0028] The present invention provides a heating device for dephenolizing cottonseed extraction process and a negative pressure flash desolventizing method, which have the following beneficial effects:

[0029] The heating device for the dephenolized cottonseed extraction process and the negative pressure flash desolventizing method use a one-way sleeve heater during the use of the device. The discharge temperature of the soap locust and waste liquid desolventizing treatment during the material heating process is monitored by a temperature sensor and interlocked with a pneumatic automatic control valve. After the temperature is set, the amount of steam input can be adjusted automatically. The material is heated during the conveying flow process, which solves the problem of soap locust and waste liquid clogging the equipment with viscosity and low production efficiency in traditional heating methods.

[0030] The heating device for dephenolized cottonseed extraction process and the negative pressure flash desolventizing method, the negative pressure system, can reduce the boiling point of the solvent, and combined with the foam separator and the multi-stage separator, solve the problems of easy foaming and tank overflow in the desolventizing of saponins and waste liquid in the cottonseed oil mixed oil refining and dephenolized cottonseed protein processing, and the high residual solvent in the saponins and waste liquid cannot be heated.

[0031] The heating device for the dephenolization cottonseed extraction process and the negative pressure flash desolventizing method use temperature sensors and pneumatic automatic control valves. During the use of the device, the discharge temperature of the saponins and waste liquid desolventizing treatment during the material heating process is monitored by the temperature sensor and interlocked with the pneumatic automatic control valve. After the temperature is set, the amount of steam intake can be adjusted automatically to reduce steam usage, increase solvent recovery utilization rate, reduce pollution emissions, reduce enterprise production costs, and protect the environment.

[0032] The heating device for the dephenolized cottonseed extraction process and the negative pressure flash desolventizing method can be replaced with zero power, and the heating steam and the material are in close contact with each other, with low consumption and no trouble. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a front view structural schematic diagram of the invention;

[0034] Figure 2 It is a schematic diagram of the process structure in the invention.

[0035] In the figure: 1. One-way sleeve heater; 2. Negative pressure flasher; 3. Defoaming gas-liquid separator; 4. Receiving tank; 5. Condenser; 6. Secondary separator; 7. Condensate receiving tank; 8. Feed pump; 9. Screw pump; 10. Shielded pump; 11. Water ring vacuum pump; 12. Temperature sensor; 13. Pneumatic automatic valve. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] See also Figure 1 to Figure 2 The present invention provides a technical solution: a heating device for dephenolizing cottonseed extraction process and a negative pressure flash desolventizing method, comprising a one-way sleeve heater 1, the one-way sleeve heater 1 is connected with a negative pressure flash device 2 through a pipeline, the negative pressure flash device 2 is connected with a frothing gas-liquid separator 3 through a pipeline, the frothing gas-liquid separator 3 is respectively connected with a receiving tank 4 and a condenser 5 through pipelines, the condenser 5 is respectively connected with a secondary separator 6 and a condensate receiving tank 7 through pipelines, the one-way sleeve heater 1 is connected with a feeding pump 8 through a pipeline, and a temperature sensor 12 and a pneumatic automatic control valve 13 are installed on the outside of the one-way sleeve heater 1.

[0040] In this embodiment, Figure 1 and Figure 2As shown, the receiving tank 4 is connected to the screw pump 9 through a pipeline, and the one-way casing heater 1 is respectively connected to the feeding pump 8 and the screw pump 9 through pipelines; the one-way casing heater 1 is used to heat the soap nuts / waste liquid during the flow transportation process, the feeding pump 8 is a high-lift pump used for conveying the material to be flash-desolventized, and the screw pump 9 is used for conveying the material after flash-desolventization.

[0041] In this embodiment, Figure 1 and Figure 2 As shown, the negative pressure flasher 2 is connected to the receiving tank 4 through a pipeline; the negative pressure flasher 2 is used to separate the soap nuts / waste liquid from the solvent vapor after heating, the foam-breaking gas-liquid separator 3 is used to break the foam carried by the solvent vapor after flashing and separate the vapor from the carrying liquid, and the receiving tank 4 is used to store the soap nuts / waste liquid from which the solvent is removed.

[0042] In this embodiment, Figure 1 and Figure 2 As shown, the condenser 5 is connected to the condensate receiving tank 7 through a pipeline; the condenser 5 is used for condensation recovery of flashed solvent vapor, the secondary separator 6 is used for separation of non-condensable gas and solvent liquid carried by negative pressure, and the condensate receiving tank 7 is used for temporary storage of condensed recovered solvent.

[0043] In this embodiment, Figure 1 and Figure 2 As shown, the secondary separator 6 is connected to a water ring vacuum pump 11 through a pipeline, and the condensate receiving tank 7 is connected to a shielded pump 10 through a pipeline; the shielded pump 10 is used to extract the condensed and recovered solvent in the negative pressure system, and the water ring vacuum pump 11 is used to extract negative pressure from the system.

[0044] Embodiment 1: A negative pressure flash desolventizing method for dephenolizing cottonseed during extraction, comprising the following specific steps:

[0045] Step 1: Material heating, the specific steps are as follows:

[0046] (1) The solvent contained in the saponins and waste liquid generated during the cottonseed oil mixed oil refining and dephenolization cottonseed protein processing is transported into the one-way sleeve heater 1 through the feeding pump 8;

[0047] (2) The one-way sleeve heater 1 is connected to steam, and the steam entry is controlled by a pneumatic automatic valve 13. The desolventizing temperature of the soap locust and waste liquid is set to 80-85°C, and the material input amount and the discharge temperature are adjusted. The heated material enters the negative pressure flasher 2;

[0048] Step 2: Material processing, the specific steps are as follows:

[0049] (1) When the material in the negative pressure flasher 2 has a poor flash desolventizing effect, it is circulated through the screw pump 9 to enter the one-way sleeve heater 1 and the negative pressure flasher 2 for desolventizing until the residual solvent in the soap locust and the waste liquid is completely removed;

[0050] (2) After the solvent is removed, the sapodilla and waste liquid enter the receiving tank 4 and are transported to the sapodilla pool or waste liquid pool through the screw pump 9;

[0051] Step 3: Material separation, when the flashed solvent vapor enters the foam-breaking gas-liquid separator 3, after foam-breaking gas-liquid separation, the liquid enters the receiving tank 4, and the solvent vapor enters the condenser 5;

[0052] Step 4: The material is condensed. The solvent condensed by the condenser 5 enters the condensate receiving tank 7, and is transported by the shielded pump 10 for water separation and then recycled. The non-condensable gas of the condenser 5 enters the secondary separator 6 for gas-liquid separation, and the liquid enters the condensate receiving tank 7. The gas enters the matching balance tank through the exhaust port of the water ring vacuum pump 11, and then passes through the last condenser 5, and is absorbed by the water absorption tower and discharged to the outside.

[0053] Embodiment 2: A negative pressure flash desolventizing method for dephenolizing cottonseed during extraction, comprising the following specific steps:

[0054] Step 1: Material heating, the specific steps are as follows:

[0055] (1) The solvent contained in the saponins and waste liquid generated during the cottonseed oil mixed oil refining and dephenolization cottonseed protein processing is transported into the one-way sleeve heater 1 through the feeding pump 8;

[0056] (2) The one-way sleeve heater 1 is connected to steam, and the steam inlet is controlled by a pneumatic automatic valve 13. The desolventizing temperature of the soap locust and waste liquid is set to 82°C, and the material input amount and the discharge temperature are adjusted. The heated material enters the negative pressure flasher 2;

[0057] Step 2: Material processing, the specific steps are as follows:

[0058] (1) When the material in the negative pressure flasher 2 has a poor flash desolventizing effect, it is circulated through the screw pump 9 to enter the one-way sleeve heater 1 and the negative pressure flasher 2 for desolventizing until the residual solvent in the soap locust and the waste liquid is completely removed;

[0059] (2) After the solvent is removed, the sapodilla and waste liquid enter the receiving tank 4 and are transported to the sapodilla pool or waste liquid pool through the screw pump 9;

[0060] Step 3: Material separation, when the flashed solvent vapor enters the foam-breaking gas-liquid separator 3, after foam-breaking gas-liquid separation, the liquid enters the receiving tank 4, and the solvent vapor enters the condenser 5;

[0061] Step 4: The material is condensed. The solvent condensed by the condenser 5 enters the condensate receiving tank 7, and is transported by the shielded pump 10 for water separation and then recycled. The non-condensable gas of the condenser 5 enters the secondary separator 6 for gas-liquid separation, and the liquid enters the condensate receiving tank 7. The gas enters the matching balance tank through the exhaust port of the water ring vacuum pump 11, and then passes through the last condenser 5, and is absorbed by the water absorption tower and discharged to the outside.

[0062] Conclusion: This method can safely, economically and reliably remove the residual solvent in the soap locust / waste liquid and realize its recovery and reuse. The use of negative pressure flash can reduce the boiling point of the solvent vapor, reduce the amount of steam used, lower the boiling point temperature of the solvent vapor, and prevent the soap locust / waste liquid from foaming and overflowing the tank at high temperature.

[0063] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heating device for dephenolizing cottonseed extraction process, comprising a one-way sleeve heater (1), characterized in that: The one-way tube heater (1) is connected to the negative pressure flasher (2) through a pipeline, the negative pressure flasher (2) is connected to the defoaming gas-liquid separator (3) through a pipeline, the defoaming gas-liquid separator (3) is respectively connected to the receiving tank (4) and the condenser (5) through pipelines, the condenser (5) is respectively connected to the secondary separator (6) and the condensate receiving tank (7) through pipelines, the one-way tube heater (1) is connected to a feeding pump (8) through a pipeline, and a temperature sensor (12) and a pneumatic automatic control valve (13) are installed on the outside of the one-way tube heater (1).

2. A heating device for dephenolizing cottonseed extraction process according to claim 1, characterized in that: The receiving tank (4) is connected to a screw pump (9) via a pipeline, and the one-way sleeve heater (1) is respectively connected to a feed pump (8) and a screw pump (9) via pipelines.

3. A heating device for dephenolizing cottonseed extraction process according to claim 1, characterized in that: The negative pressure flasher (2) is connected to the receiving tank (4) through a pipeline.

4. A heating device for dephenolizing cottonseed extraction process and a negative pressure flash desolventizing method according to claim 1, characterized in that: The condenser (5) is connected to the condensate receiving tank (7) through a pipeline.

5. A heating device for dephenolizing cottonseed extraction process according to claim 1, characterized in that: The secondary separator (6) is connected to a water ring vacuum pump (11) via a pipeline, and the condensate receiving tank (7) is connected to a shielded pump (10) via a pipeline.

6. The negative pressure flash desolventizing method for dephenolizing cottonseed in the extraction process according to claim 1, characterized in that: The specific steps include: Step 1: Material heating, the specific steps are as follows: (1) The solvent contained in the soap locust and waste liquid generated during the cottonseed oil mixed oil refining and dephenolization cottonseed protein processing is transported into the one-way sleeve heater (1) through a feeding pump (8); (2) The one-way sleeve heater (1) is connected to steam, and the amount of steam entering is controlled by a pneumatic automatic valve (13). The desolventizing temperature of the soap nuts and waste liquid is set to 80-85° C. The amount of material added and the discharge temperature are adjusted, and the heated material enters the negative pressure flasher (2); Step 2: Material processing, the specific steps are as follows: (1) When the flash desolventizing effect of the material in the negative pressure flash device (2) is poor, the material is circulated through the screw pump (9) to enter the one-way sleeve heater (1) and the negative pressure flash device (2) for desolventizing until the residual solvent in the soap locust and the waste liquid is completely removed; (2) After the solvent is removed, the saponins and waste liquid enter the receiving tank (4) and are transported to the saponin pool or waste liquid pool through the screw pump (9); Step 3: Material separation, when the flashed solvent vapor enters the defoaming gas-liquid separator (3), after defoaming and gas-liquid separation, the liquid enters the receiving tank (4) and the solvent vapor enters the condenser (5); Step 4: The material is condensed. The solvent condensed by the condenser (5) enters the condensate receiving tank (7), and is transported by the shielded pump (10) for water separation and then recycled. The non-condensable gas of the condenser (5) enters the secondary separator (6) for gas-liquid separation. The liquid enters the condensate receiving tank (7). The gas enters the matching balance tank through the exhaust port of the water ring vacuum pump (11), and then passes through the last condenser (5), is absorbed by the water absorption tower and discharged to the outside.

7. The negative pressure flash desolventizing method for dephenolizing cottonseed during extraction according to claim 6, characterized in that: The feed pump (8) has a head of 53-57m and a flow rate of 13-17m 3 / h feeding pump (8).

8. The negative pressure flash desolventizing method for dephenolizing cottonseed in the extraction process according to claim 6, characterized in that: During the material heating process, the discharge temperature of the soap nuts and waste liquid desolventizing treatment is monitored by a temperature sensor (12) and is interlocked with a pneumatic automatic control valve (13).

9. The method for dephenolizing cottonseed by adding negative pressure flash desolventizing during extraction according to claim 6, characterized in that: The circulation tube bundle of the one-way tube-in-tube heater (1) is connected to the heater body by means of a flange.

10. A heating device for dephenolizing cottonseed extraction process and a negative pressure flash desolventizing method according to claim 6, characterized in that: The waste liquid after the solvent is removed is used as the stock liquid for extracting raffinose.

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