Automatic experimental device for butane extraction of vegetable oil

Abstract

The utility model discloses an automatic experimental device for butane extraction of vegetable oil, which comprises an extraction tank, an evaporation tank, a buffer tank, a compressor, a condenser, a solvent turnover tank, a vacuum pump and a solvent pump, liquid inlets of the extraction tank and the evaporation tank are connected in parallel through a pipeline and then connected with an outlet of the solvent pump, liquid outlets of the extraction tank and the solvent turnover tank are connected in parallel through a pipeline and then connected with an inlet of the solvent pump, and exhaust ports of the extraction tank and the evaporation tank are connected in parallel through a pipeline and then connected with an air inlet of the buffer tank. An exhaust port of the buffer tank is connected with an inlet of the compressor through a pipeline, an outlet of the compressor is connected with an inlet of the condenser through a pipeline, and an outlet of the condenser is connected with an inlet of the solvent turnover tank through a pipeline. According to the device, a certain oil product can be produced in a small scale in a laboratory, and a butane extraction process, operation parameters and the like of a certain substance can be known and mastered.

Description

Technical Field

[0001] The utility model relates to an automated experimental device for butane extraction of vegetable oil, belonging to the technical field of vegetable oil extraction equipment. Background Art

[0002] Butane is gaseous at room temperature and is easily compressed and liquefied to a subcritical state. The subcritical butane vegetable oil extraction process is a process method that uses liquid butane as a solvent to extract oil from vegetable oil. This process is carried out at room temperature or medium and low temperature and a certain pressure. It has the characteristics of retaining biologically active substances, improving oil yield, avoiding the adverse effects of high temperature treatment, and low production cost. It is widely used in the field of large-scale vegetable oil extraction in industry. However, there is a lack of corresponding butane extraction experimental equipment in the laboratory, especially colleges and universities and scientific research institutes lack an experimental device that can simulate the complete process of large-scale production and produce a certain oil product in a small scale in the laboratory. Summary of the invention

[0003] In view of the problems existing in the prior art, the utility model provides a butane extraction experimental device, in order to achieve the ability to simulate the process of butane extraction of vegetable oil in industry and to produce a certain oil product in a small scale in a laboratory.

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

[0005] The invention discloses an automated experimental device for butane extraction of vegetable oil, comprising an extraction tank, an evaporation tank, a buffer tank, a compressor, a condenser, a solvent turnover tank, a vacuum pump and a solvent pump. The emptying ports of the extraction tank, the evaporation tank and the buffer tank are connected in parallel with the vacuum pump through pipelines, the liquid inlets of the extraction tank and the evaporation tank are connected in parallel with the outlet of the solvent pump through pipelines, the liquid outlets of the extraction tank and the solvent turnover tank are connected in parallel with the inlet of the solvent pump through pipelines, the exhaust ports of the extraction tank and the evaporation tank are connected in parallel with the air inlet of the buffer tank through pipelines, the exhaust port of the buffer tank is connected to the inlet of the compressor through a pipeline, the outlet of the compressor is connected to the inlet of the condenser through a pipeline, and the outlet of the condenser is connected to the inlet of the solvent turnover tank through a pipeline.

[0006] Furthermore, jackets are provided at the lower parts of the extraction tank, evaporation tank and buffer tank, the water inlets of the three jackets are connected to the water outlet of the hot water pump through pipes in parallel, the water outlets of the three jackets enter the hot water tank through pipes in parallel, and the water outlet of the hot water tank is connected to the water inlet of the hot water pump.

[0007] Furthermore, the extraction tank, evaporation tank, buffer tank, condenser, solvent turnover tank, hot water tank, solvent pump, vacuum pump, and hot water pump are all installed on a skid frame.

[0008] Furthermore, the butane extraction experimental device also includes a refrigerator, a water outlet of the refrigerator is connected to a water inlet of a condenser, and a water outlet of the condenser is connected to a water inlet of the refrigerator.

[0009] Furthermore, valves are provided on the pipes connected to the drain port, liquid inlet, exhaust port and liquid outlet of the extraction tank and evaporation tank, and valves are provided on the pipes connected to the drain port, air inlet and exhaust port of the buffer tank.

[0010] Furthermore, the valve is an electrically controlled valve; a temperature sensor and a pressure sensor are also provided on the extraction tank; a flow meter is also provided on the outlet pipe of the solvent pump; the butane extraction experimental device also includes a controller, and the vacuum pump, compressor, refrigerator, hot water pump, solvent pump, electrically controlled valve, temperature sensor, pressure sensor, and flow meter are all electrically connected to the controller.

[0011] Beneficial effects: The utility model installs the extraction tank, evaporation tank, buffer tank, condenser, solvent turnover tank, hot water tank, solvent pump, vacuum pump, hot water pump, etc. on a skid-type frame. The structure is compact and occupies little space, which is convenient for installation, movement and debugging of the equipment. The automatic control of the extraction can be realized through the program control of the controller, such as automatic liquid addition of the extraction tank, and the soaking temperature, soaking time and soaking times are flexibly adjustable. It has the function of simulating a complete butane extraction process of large-scale production, which is of great help to school teaching and research, internship, etc. It can not only produce a certain oil product in a miniaturized manner in the laboratory, but also understand and master the extraction process and operating parameters of a certain substance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the composition structure of the utility model.

[0013] Markings in the figure: 1 extraction tank, 2 evaporation tank, 3 buffer tank, 4 condenser, 5 solvent turnover tank, 6 hot water tank, 7 compressor, 8 solvent pump, 9 vacuum pump, 10 hot water pump, 11 extraction tank emptying valve, 12 extraction tank liquid inlet valve, 13 extraction tank exhaust valve, 14 extraction tank liquid outlet valve, 21 evaporation tank emptying valve, 22 evaporation tank liquid inlet valve, 23 evaporation tank exhaust valve, 24 evaporation tank liquid outlet valve, 31 buffer tank air inlet valve, 32 buffer tank emptying valve, 33 buffer tank exhaust valve, 41 refrigerator, 51 turnover tank liquid outlet valve, 81 flow meter. DETAILED DESCRIPTION

[0014] The present invention is described in detail below in detail with reference to the accompanying drawings.

[0015] like Figure 1As shown, an automated experimental device for butane extraction of vegetable oil includes an extraction tank 1, an evaporation tank 2, a buffer tank 3, a condenser 4, a solvent turnover tank 5, a hot water tank 6, a compressor 7, a solvent pump 8, a vacuum pump 9, a hot water pump 10, a refrigerator 41 and other equipment components, wherein except for the compressor 7 and the refrigerator 41, the remaining components are installed on a skid frame, which is convenient for the installation, movement and debugging of the equipment. A control box and a controller are also arranged on the skid frame, and the controller includes a PLC and a human-machine interface, etc., wherein the skid frame and the controller are not shown in the figure. Since the compressor and the refrigerator are relatively large in size, they are not integrated into the skid frame. Of course, the compressor and the refrigerator can also be integrated into the skid frame according to actual needs.

[0016] The volume of the extraction tank 1 is 5 to 100 L, and a bracket and a filter plate are arranged inside the extraction tank 1. A feed port, a liquid inlet, an emptying port, an exhaust port, a temperature sensor, a pressure sensor, etc. are arranged on the upper part of the tank body, and a liquid outlet is arranged on the bottom of the tank body. A liquid inlet, an emptying port, and an exhaust port are arranged on the upper part of the evaporation tank 2, and a liquid outlet is arranged on the bottom of the evaporation tank 2. An air inlet, an emptying port, and an exhaust port are arranged on the upper part of the buffer tank 3.

[0017] The exhaust ports of the extraction tank 1, evaporation tank 2, and buffer tank 3 are connected in parallel with the vacuum pump 9 through pipes, the liquid inlets of the extraction tank 1 and evaporation tank 2 are connected in parallel with the outlet of the solvent pump 8 through pipes, the liquid outlets of the extraction tank 1 and solvent turnover tank 5 are connected in parallel with the inlet of the solvent pump 8 through pipes, the exhaust ports of the extraction tank 1 and evaporation tank 2 are connected in parallel with the air inlet of the buffer tank 3 through pipes, the exhaust port of the buffer tank 3 is connected to the inlet of the compressor 7 through pipes, the outlet of the compressor 7 is connected to the inlet of the condenser 4 through pipes, and the outlet of the condenser 4 is connected to the inlet of the solvent turnover tank 5 through pipes. The water outlet of the refrigerator 41 is connected to the water inlet of the condenser 4, and the water outlet of the condenser 41 is connected to the water inlet of the refrigerator 41. The refrigerator provides cooling water to circulate and cool the condenser. Valves are provided on the pipes connected to the drain port, liquid inlet, exhaust port and liquid outlet of the extraction tank and evaporation tank, and valves are provided on the pipes connected to the drain port, air inlet and exhaust port of the buffer tank. The valves are all electrically controlled valves, specifically extraction tank drain valve 11, extraction tank liquid inlet valve 12, extraction tank exhaust valve 13, extraction tank liquid outlet valve 14, evaporation tank drain valve 21, evaporation tank liquid inlet valve 22, evaporation tank exhaust valve 23, evaporation tank liquid outlet valve 24, buffer tank air inlet valve 31, buffer tank drain valve 32, buffer tank exhaust valve 33. A flow meter 81 is also provided on the outlet pipe of the solvent pump 8.

[0018] A heating jacket is provided at the bottom of the extraction tank 1, the evaporation tank 2 and the buffer tank 3. The water inlets of the three jackets are connected to the water outlet of the hot water pump 10 through pipes in parallel. The water outlets of the three jackets enter the hot water tank 6 through pipes in parallel. The water outlet of the hot water tank 6 is connected to the water inlet of the hot water pump 10. In this way, the hot water generated in the hot water tank enters the jacket circulation through the output of the hot water pump, and the extraction tank 1, the evaporation tank 2 and the buffer tank 3 can be heated.

[0019] The vacuum pump 9, compressor 7, refrigerator 41, hot water tank 6 and hot water pump 10, solvent pump 8, various electric control valves, temperature sensors, pressure sensors, flow meters, etc. are all electrically connected to the controller, and automatic operation of the extraction can be achieved through program control of the controller.

[0020] The extraction process is described as follows:

[0021] First, add a certain volume of extraction solvent into the solvent turnover tank 5. The solvent required for extraction is one or a mixture of propane, butane, 134a, and dimethyl ether. Then open the extraction tank, weigh the pretreated plant raw materials, put them into the extraction tank, and then seal it. Open the human-machine interface parameter setting screen, and set the soaking temperature, time, number of times and other parameters according to the oil content of the raw materials. Start the automatic control button - extraction starts.

[0022] First, evacuate the tanks. Open the extraction tank drain valve 11, the evaporation tank drain valve 21, and the buffer tank drain valve 32. Start the vacuum pump 9 to exhaust the air in the three tanks to prevent the formation of a mixture of solvent gas and air. When a certain vacuum degree is reached, close the drain valve and the vacuum pump. The three tanks can be evacuated and emptied simultaneously or separately without affecting each other. For example, when running the extraction tank drain system: the extraction tank drain valve 11 is opened, and the vacuum pump 9 is started (emptying begins); when the drain pressure reaches a certain pressure, the drain system is automatically closed.

[0023] Then run the extraction tank into the solvent - soak - discharge mixed oil system:

[0024] a. The extraction tank inlet valve 12 is opened - the turnover tank outlet valve 51 is opened - the solvent pump 8 is started (the extraction tank starts to feed solvent); when the liquid level gauge in the tank reaches the set value - the liquid feeding system stops (the feeding is completed); b. The automatic heating system of the extraction tank is operated, and when the temperature reaches the soaking temperature, the heating system is automatically shut down (the heating of the extraction tank is completed); c. When the first soaking is completed - the extraction tank outlet valve 14 is opened, the evaporation tank inlet valve 22 is opened, the solvent pump 8 is turned on (it can also rely on gravity to automatically drain liquid), and the liquid drainage is automatically operated (the extraction tank starts to drain the mixed oil and enter the evaporation tank); when the liquid level gauge reaches the set value - the liquid drainage system stops (the liquid drainage is completed), and the first extraction is completed; then repeat the above extraction tank solvent feeding - soaking - mixed oil drainage process, and when the number of extractions reaches the set number, the extraction of mixed oil by the extraction tank is completed

[0025] The next step is the desolventizing system of the extraction tank raw materials:

[0026] When the extraction tank finishes extracting the mixed oil, the extraction tank raw material desolventizing system automatically operates: open the extraction tank exhaust valve 13, open the buffer tank air inlet valve 31, start the compressor 7 and refrigerator 41, start the extraction tank heating system, so that the residual solvent in the extraction tank 1 is gasified and enters the buffer tank 3, and then is compressed by the compressor 7 and condensed by the condenser 4 and then converted into liquid again and enters the solvent turnover tank 5. When the extraction tank pressure reaches a certain value + the extraction tank temperature reaches the set value (extraction tank desolventizing is completed) - the extraction tank desolventizing system automatically shuts down; at this time, the extraction tank can be opened to take out the raw materials (also called meal).

[0027] Next is the evaporation tank mixed oil evaporation system:

[0028] When the first discharge of the extraction tank is completed, the mixed oil evaporation system of the evaporator can be automatically operated; during operation, the exhaust valve 23 of the evaporator is opened, the air inlet valve 31 of the buffer tank is opened, the compressor 7 and the refrigerator 41 are started, and the heating system of the evaporator is started, so that the solvent in the mixed oil in the evaporator 2 is gasified and enters the buffer tank 3, and then is compressed by the compressor 7 and condensed by the condenser 4 and converted into liquid again and enters the solvent turnover tank 5. When the pressure of the evaporator reaches a certain value + the temperature of the evaporator reaches the set value (the evaporation of the evaporator is completed)-the evaporation system is automatically closed. The first evaporation of the mixed oil is completed, and then the above evaporation process of the mixed oil in the evaporator is repeated..., when the number of evaporations reaches the set value, the evaporation of the mixed oil by the evaporator is completed; at this time, there is still extracted vegetable oil in the evaporator, and the crude oil can be taken out by opening the liquid outlet valve 24. The above evaporation system of the mixed oil in the evaporator can be carried out after each extraction, or the mixed liquid extracted each time can be accumulated and evaporated uniformly.

[0029] Finally, turn off the automatic control stop button - the extraction is completed.

Claims

1. An automated experimental device for butane extraction of vegetable oil, characterized in that: The invention comprises an extraction tank, an evaporation tank, a buffer tank, a compressor, a condenser, a solvent turnover tank, a vacuum pump, a solvent pump, a hot water pump and a refrigerator. The emptying ports of the extraction tank, the evaporation tank and the buffer tank are connected in parallel with the vacuum pump through pipelines, the liquid inlets of the extraction tank and the evaporation tank are connected in parallel with the outlet of the solvent pump through pipelines, the liquid outlets of the extraction tank and the solvent turnover tank are connected in parallel with the inlet of the solvent pump through pipelines, the exhaust ports of the extraction tank and the evaporation tank are connected in parallel with the air inlet of the buffer tank through pipelines, the exhaust port of the buffer tank is connected to the inlet of the compressor through a pipeline, the outlet of the compressor is connected to the inlet of the condenser through a pipeline, the outlet of the condenser is connected to the inlet of the solvent turnover tank through a pipeline, the water outlet of the refrigerator is connected to the water inlet of the condenser, and the water outlet of the condenser is connected to the water inlet of the refrigerator.

2. The automated experimental device for butane extraction of vegetable oil according to claim 1, characterized in that: Jackets are arranged at the bottom of the extraction tank, evaporation tank and buffer tank. The water inlets of the three jackets are connected to the water outlet of the hot water pump through pipes in parallel. The water outlets of the three jackets enter the hot water tank through pipes in parallel. The water outlet of the hot water tank is connected to the water inlet of the hot water pump.

3. The automated experimental device for butane extraction of vegetable oil according to claim 2, characterized in that: The extraction tank, evaporation tank, buffer tank, condenser, solvent turnover tank, hot water tank, solvent pump, vacuum pump and hot water pump are all installed on a skid frame.

4. The automated experimental device for butane extraction of vegetable oil according to claim 1, characterized in that: Valves are provided on the pipes connected to the drain port, liquid inlet, exhaust port and liquid outlet of the extraction tank and evaporation tank, and valves are provided on the pipes connected to the drain port, air inlet and exhaust port of the buffer tank.

5. The automated experimental device for butane extraction of vegetable oil according to claim 4, characterized in that: The valve is an electrically controlled valve; a temperature sensor and a pressure sensor are also provided on the extraction tank; a flow meter is also provided on the outlet pipe of the solvent pump; the butane extraction automated experimental device also includes a controller, and the vacuum pump, compressor, refrigerator, hot water pump, solvent pump, electrically controlled valve, temperature sensor, pressure sensor, and flow meter are all electrically connected to the controller.

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