Hexane extraction experiment device

Abstract

The utility model discloses a hexane extraction experiment device which comprises an extraction tank, a mixed oil temporary storage tank, a climbing film evaporator, a separator, a stripping tower, a solvent turnover tank, a water distribution tank, an extraction condenser, an evaporation condenser, a stripping condenser, a tail gas condenser, a water cooling unit, a solvent pump, a mixed oil pump, a trapping pump and the like which are connected through pipelines, and the components are integrated on a pry-type framework. The device is compact in structure and complete in function, can be used for producing a certain oil product in a small scale in a laboratory, and can also be used for knowing and mastering a hexane extraction process and operation parameters of a certain substance.

Description

Technical Field

[0001] The utility model relates to an extraction device, in particular to a hexane extraction experimental device, belonging to the technical field of extraction equipment. Background Art

[0002] Most of the edible oil industry in my country adopts hexane extraction technology, which has a large production scale and is suitable for substances that are not very sensitive to temperature. Hexane is liquid at room temperature, with a boiling point of 69 degrees and a relative density of 0.66 (relative to water is 1). It is insoluble in water. Since it is liquid at room temperature and pressure, the extraction equipment is normal pressure equipment and does not require a pressure vessel. In the extraction process, the solvent in the mixed oil generally needs to be heated, separated, extracted and recovered with water vapor, so the equipment is relatively complex. At present, there is a lack of miniaturized hexane extraction experimental equipment suitable for laboratory scientific research. At present, the Soxhlet extraction method is basically used for the extraction of vegetable oil in the laboratory. This method is a far cry from large-scale industrial production as an instrument for testing the oil content or residual oil of a certain substance. Therefore, a set of experimental equipment that can simulate large-scale industrial hexane extraction is needed. Summary of the invention

[0003] In view of the problems existing in the prior art, the utility model provides a hexane extraction experimental device to meet the scientific research needs of laboratories of scientific research institutes.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A hexane extraction experimental device comprises an extraction tank, a mixed oil temporary storage tank, a rising film evaporator, a separator, a stripping tower, a solvent turnover tank, a water distribution tank, an extraction condenser, an evaporation condenser, a stripping condenser, a tail gas condenser, a water cooling unit, a solvent pump, a mixed oil pump, and a capture pump;

[0006] The liquid outlet of the solvent turnover tank is connected to the liquid adding port of the extraction tank by a pipeline provided with an auxiliary agent pump, the liquid outlet and the liquid adding port of the extraction tank are connected by a pipeline provided with a mixing oil pump, the liquid adding port of the extraction tank is connected in parallel with the liquid adding port of the temporary storage tank, the liquid outlet of the temporary storage tank is connected to the liquid inlet below the rising film evaporator, the liquid outlet above the rising film evaporator is connected to the separator, the liquid outlet below the separator is connected to the stripping tower, the air outlet above the stripping tower is connected to the air inlet of the stripping condenser, the liquid outlet below the stripping condenser is connected to the water distribution tank, the exhaust port above the temporary storage tank is connected in parallel with the exhaust port above the separator and then connected to the air inlet of the evaporative condenser, the exhaust port below the evaporative condenser is connected to the exhaust port below the separator. The liquid inlet is connected to the solvent turnover tank, the air outlet above the extraction tank is connected to the air inlet of the extraction condenser, the liquid outlet below the extraction condenser is connected to the water distribution tank, the exhaust port of the stripping condenser, the exhaust port of the evaporative condenser, the exhaust port of the extraction condenser, and the exhaust port of the water distribution tank are connected in parallel and then connected to the air inlet of the tail gas condenser, the liquid outlet of the tail gas condenser, the liquid outlet of the extraction condenser, and the liquid outlet of the stripping condenser are connected in parallel, and the upper discharge port of the water distribution tank is connected to the solvent turnover tank; the water cooling unit provides cooling circulating water for the stripping condenser, the evaporative condenser, and the extraction condenser, and the capture pump provides cooling circulating medium for the tail gas condenser; the extraction tank, the rising film evaporator, and the stripping tower are all connected to the steam pipeline.

[0007] Furthermore, the extraction tank, mixed oil temporary storage tank, rising film evaporator, separator, stripping tower, solvent turnover tank, water distribution tank, extraction condenser, evaporation condenser, stripping condenser, tail gas condenser, solvent pump, mixed oil pump, and capture pump are installed on a skid frame.

[0008] Furthermore, a first heater is provided on the pipeline between the auxiliary agent pump and the extraction tank, and a second heater is provided on the pipeline between the mixing oil pump and the liquid filling port of the extraction tank.

[0009] Beneficial effects:

[0010] The hexane extraction experimental device described in the utility model has a compact structure and complete functions. It can realize the self-circulating extraction of the extraction tank by using a mixing oil pump, and can also realize the liquid transfer between the extraction tank and the temporary storage tank. The experimental device can simulate the complete hexane extraction process in large-scale industrial production, involving extraction, evaporation, separation and condensation. It is of great help to school teaching and research, internships, etc. It can not only produce a certain oil product in a small-scale manner in the laboratory, but also understand and master the hexane extraction process and operating parameters of a certain substance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is the front view of the utility model.

[0012] Figure 2 yes Figure 1 Left view after hiding the operating console.

[0013] Figure 3 yes Figure 1 Top view of the .

[0014] Figure 4 It is a schematic diagram of the extraction process. DETAILED DESCRIPTION

[0015] 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 of the embodiments.

[0016] The meanings of the numbers in the figure are as follows: 1-extraction tank, 2-mixed oil temporary storage tank, 3-rising film evaporator, 4-separator, 5-stripping tower, 6-solvent turnover tank, 7-water distribution tank, 8-extraction condenser, 9-evaporation condenser, 10-stripping condenser, 11-tail gas condenser, 12-water cooling unit, 13-solvent pump, 14-mixed oil pump, 15-capture pump, 16-explosion-proof operating table, 17-heater, 18-steam supply pipeline, 19-skid frame.

[0017] like Figure 1-3 As shown, a hexane extraction experimental device comprises an extraction tank 1, a mixed oil temporary storage tank 2, a rising film evaporator 3, a separator 4, a stripping tower 5, a solvent turnover tank 6, a water distribution tank 7, an extraction condenser 8, an evaporative condenser 9, a stripping condenser 10, a tail gas condenser 11, a water cooling unit 12, a solvent pump 13, a mixed oil pump 14, a capture pump 15, an explosion-proof operating table 16, etc.; wherein the extraction tank 1, the mixed oil temporary storage tank 2, the rising film evaporator 3, the separator 4, the stripping tower 5, the solvent turnover tank 6, the water distribution tank 7, the extraction condenser 8, the evaporative condenser 9, the stripping condenser 10, the tail gas condenser 11, the solvent pump 13, the mixed oil pump 14, the capture pump 15, etc. are arranged on a skid frame 19, and the water cooling unit 12 and the explosion-proof operating table 16 are separated from the skid frame, so that the structure can be compact, and it is convenient to move, install and debug, and save space.

[0018] The volume of the extraction tank 1 is 5 to 1000L, and it has a bracket and a filter plate inside. The tank body is provided with a feed port, a liquid inlet, a liquid outlet, a thermometer, a liquid level gauge, a balance tube and other devices; the solvent turnover tank can store one or more mixtures of pentane, hexane, isopropyl ether, ethyl acetate, etc., and the liquid auxiliary agent with a boiling point of 25 to 95°C under normal pressure is used as an extractant. There is a water vapor inlet on or inside the extraction tank, rising film evaporator, and stripping tower to provide heat for heating and evaporation. The extraction condenser, evaporative condenser, and stripping condenser are all provided with cooling water inlet and outlet pipes, and the chiller can provide them with cooling circulating water at -25 to 15°C.

[0019] The connection relationship between the above equipment components is as follows Figure 4 As shown, the extraction tank 1, the rising film evaporator 3, and the stripping tower 5 are all connected to the steam pipe 18; the liquid outlet of the solvent turnover tank 6 and the liquid inlet of the extraction tank 1 are connected through a pipeline provided with an auxiliary agent pump 13, and a first heater is provided on the pipeline between the auxiliary agent pump 13 and the extraction tank 1, and the liquid outlet below the extraction tank 1 and the liquid inlet above are connected through a pipeline provided with a mixed oil 14, and a second heater is provided on the pipeline between the mixed oil pump 14 and the liquid inlet of the extraction tank 1. The first heater and the second heater are collectively referred to as heaters 17, which provide heat for the extraction solvent to enhance the extraction effect. The liquid inlet of the extraction tank 1 is connected in parallel with the liquid inlet of the temporary storage tank 2, so that a mixed oil pump 14 can be used to realize the self-circulation extraction of the extraction tank and the liquid transfer between the extraction tank and the temporary storage tank, saving cost and space.

[0020] The liquid outlet below the temporary storage tank 2 is connected to the liquid inlet below the rising film evaporator 3 through a pipeline, the liquid outlet above the rising film evaporator 3 is connected to the separator 4, the separator realizes the separation of the solvent and the vegetable oil, the liquid outlet below the separator 4 is connected to the stripping tower 5, the function of the stripping tower is to take out the residual solvent in the vegetable oil with water vapor, an oil outlet is provided below the stripping tower 5 to discharge the crude oil, the air outlet above the stripping tower 5 is connected to the air inlet of the stripping condenser 10, the liquid outlet below the stripping condenser 10 is connected to the water diversion tank 7, the exhaust port above the temporary storage tank 2 is connected to the exhaust port above the separator 4 in parallel with the air inlet of the evaporative condenser 9, because the solvent cooled down by the evaporative condenser does not contain water, the liquid outlet below the evaporative condenser 9 is directly connected to the solvent turnover tank 6; above the extraction tank 1 The air outlet is connected with the air inlet of the extraction condenser 8, the liquid outlet below the extraction condenser 8 is connected with the water distribution tank 7, the exhaust port of the stripping condenser, the exhaust port of the evaporative condenser, the exhaust port of the extraction condenser, and the exhaust port of the water distribution tank are connected in parallel and connected with the air inlet of the tail gas condenser 11, and the condensed liquid after spraying and capturing by the capture pump 15 is discharged from the liquid outlet below, and finally the remaining tail gas is discharged from the top of the tail gas condenser 11, and the liquid outlet of the tail gas condenser, the liquid outlet of the extraction condenser, and the liquid outlet of the stripping condenser are connected in parallel and connected with the water distribution tank; in the water distribution tank, water sinks below and the solvent floats above, so the upper discharge port of the water distribution tank is connected with the solvent turnover tank; the water cooling unit provides cooling circulating water for the stripping condenser, the evaporative condenser, and the extraction condenser, and the capture pump provides cooling circulating medium for the tail gas condenser. Electric control valves can be installed on each connected pipeline as needed. The electric control valves, temperature sensors, pressure sensors, flow meters, etc. are electrically connected to the control system of the explosion-proof operating table to facilitate the automated operation of the entire equipment.

[0021] The general process of the above-mentioned whole set of extraction experimental equipment is as follows:

[0022] First, add enough hexane solvent to the solvent turnover tank 6, then open the extraction tank 1, add the material to be extracted, then close the material inlet of the extraction tank, start the solvent pump 13 and the heater 17, add the appropriate solvent to the extraction tank 1 for the first time to start extraction, and after soaking for a certain period of time, open the mixed oil pump 14 for extraction self-circulation. After the first extraction, the first extraction liquid is transferred from the extraction tank 1 to the temporary storage tank 2 by the mixed oil pump 14. Then repeat the above steps for the second and third extractions, etc., until the extraction is completed, and the extracts are temporarily stored in the temporary storage tank 2. In the next step, water vapor is introduced into the material meal left in the extraction tank to evaporate and take away the residual solvent in the meal. The mixed gas of the solvent and water vapor output from the top of the extraction tank enters the extraction condenser 8, and after cooling, enters the water separation tank 7 to separate the solvent and water. When the evaporation of the extraction tank is completed, the material port can be opened to take out the meal after desolvation.

[0023] Then the solvent mixed oil in the temporary storage tank 2 is transferred to the rising film evaporator 3. After being heated by the water vapor, the mixed oil evaporates in the rising film and enters the separator 4. The vegetable oil extracted in the separator 4 is stored in the lower part in liquid form and then enters the stripping tower 5; the solvent vapor in the separator 4 and the solvent vapor in the temporary storage tank 2 enter the steam condenser 9. The solvent liquid generated after cooling does not contain water and can be directly discharged into the solvent turnover tank 6.

[0024] Then, water vapor is introduced into the mixed oil in the stripping tower to remove the residual solvent in the mixed oil, and the discharged gas enters the stripping condenser 10, and the condensed liquid enters the water separation tank 7 for separation of solvent and water. Finally, the oil remaining at the bottom of the stripping tower can be discharged from the bottom liquid outlet to obtain the final crude oil extracted.

[0025] The exhaust port of the stripping condenser 10, the exhaust port of the evaporative condenser 9, and the exhaust port of the extraction condenser 8 will all discharge the remaining gas, which still contains a small amount of solvent gas and needs to be desolvated for a second time. After the three are combined with the exhaust port of the water separation tank, they enter the tail gas condenser 11 again. The liquid produced after the last condensation enters the water separation tank 7, and the last residual gas is emptied and released, which not only protects the environment but also saves the consumption of solvent. In the water separation tank 7, the solvent is separated from the water, and the solvent floats on the top. After exceeding a certain liquid level, it can enter the solvent turnover tank 6 for reuse, and the water at the bottom of the water separation tank 7 can be discharged regularly.

[0026] 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 within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hexane extraction experimental device, characterized in that, It includes an extraction tank, a mixed oil temporary storage tank, a rising film evaporator, a separator, a stripping tower, a solvent turnover tank, a water distribution tank, an extraction condenser, an evaporative condenser, a stripping condenser, a tail gas condenser, a water cooling unit, a solvent pump, a mixed oil pump, and a capture pump; the liquid outlet of the solvent turnover tank is connected to the liquid adding port of the extraction tank by a pipeline provided with an auxiliary agent pump, the liquid outlet and the liquid adding port of the extraction tank are connected by a pipeline provided with a mixed oil pump, the liquid adding port of the extraction tank is connected in parallel with the liquid adding port of the temporary storage tank, the liquid outlet of the temporary storage tank is connected to the liquid inlet below the rising film evaporator, the liquid outlet above the rising film evaporator is connected to the separator, the liquid outlet below the separator is connected to the stripping tower, the air outlet above the stripping tower is connected to the air inlet of the stripping condenser, the liquid outlet below the stripping condenser is connected to the water distribution tank, the top of the temporary storage tank The exhaust port is connected in parallel with the exhaust port above the separator and then connected to the air inlet of the evaporative condenser, the liquid outlet below the evaporative condenser is connected to the solvent turnover tank, the air outlet above the extraction tank is connected to the air inlet of the extraction condenser, the liquid outlet below the extraction condenser is connected to the water distribution tank, the exhaust port of the stripping condenser, the exhaust port of the evaporative condenser, the exhaust port of the extraction condenser and the exhaust port of the water distribution tank are connected in parallel and then connected to the air inlet of the tail gas condenser, the liquid outlet of the tail gas condenser, the liquid outlet of the extraction condenser and the liquid outlet of the stripping condenser are connected in parallel, and the upper discharge port of the water distribution tank is connected to the solvent turnover tank; the water cooling unit provides cooling circulating water for the stripping condenser, the evaporative condenser and the extraction condenser, and the capture pump provides cooling circulating medium for the tail gas condenser; the extraction tank, the rising film evaporator and the stripping tower are all connected to the steam pipeline.

2. A hexane extraction experimental device according to claim 1, characterized in that: The extraction tank, mixed oil temporary storage tank, rising film evaporator, separator, stripping tower, solvent turnover tank, water distribution tank, extraction condenser, evaporation condenser, stripping condenser, tail gas condenser, solvent pump, mixed oil pump and capture pump are installed on a skid frame.

3. A hexane extraction experimental device according to claim 1, characterized in that: A first heater is arranged on the pipeline between the auxiliary agent pump and the extraction tank, and a second heater is arranged on the pipeline between the mixing oil pump and the liquid filling port of the extraction tank.

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