Method for enhancing aroma of squeezed walnut oil by using crushed walnut kernels

Abstract

The invention discloses a method for enhancing aroma of squeezed walnut oil by using crushed walnut kernels, and belongs to the technical field of food processing. Comprising five steps, and through the steps, the decolored walnut oil can obtain a relatively obvious aroma enhancement effect, so that the finally prepared walnut oil has a nut aroma. The device further comprises a material sucking and mixing device, the mixing device can mix a decolorizing agent and the crushed walnut kernels through the arrangement of the mixing tank and the decolorizing tank, so that the crushed walnut kernels heated at high temperature are in full contact with walnut oil, and nut fragrance generated after the crushed walnut kernels are heated at high temperature can be fully dissolved in the walnut oil; and when the crushed walnut kernels are added into the mixing tank, the decolorizing agent in the pressed cavity can quickly enter the feeding pipeline through low pressure formed in the discharging pipe, and is pumped into the mixing tank together with the crushed walnut kernels, so that the decolorizing efficiency of walnut oil and the absorption efficiency of nut fragrance are greatly improved.

Description

Technical Field

[0001] The invention relates to a method for enhancing the flavor of squeezed walnut oil by using crushed walnut kernels, and belongs to the technical field of food processing. Background Art

[0002] The oil content in walnut kernels is more than 65%, and the saturated fatty acid content in the fatty acid composition is less than 10%, and most of it is unsaturated fatty acids. The fatty acid composition of walnut oil gives it extremely high physiological activity and excellent quality. It has significant effects such as nourishing and moistening the lungs and strengthening the kidneys. It has anti-aging and cancer prevention effects. Long-term consumption can also reduce blood lipids and prevent cardiovascular and cerebrovascular diseases. It is a good nourishing product. At present, the main method for extracting walnut oil in industry is pressing. After pressing, the walnut oil is passed into a mixing tank for decolorization.

[0003] The hydraulic cold pressing method can preserve the natural ingredients in walnut oil very well, and the oil produced is of good quality. It is mainly used in the production of high-end edible oil, but the oil yield is low and the product does not have the nutty aroma of walnuts. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method for enhancing the flavor of squeezed walnut oil by using crushed walnut kernels, which solves the problem of bland flavor of squeezed and bleached walnut oil in the prior art.

[0005] The technical problem to be solved by the present invention is achieved by adopting the following technical scheme: A method for flavoring squeezed walnut oil by using crushed walnut kernels, comprising the following steps:

[0006] S1: Select fully mature, clean, peeled walnut kernels newly harvested in the current year, grind them into particles of 10-20 mm using a grinding mill, and then sieve the walnut kernels using a double-layer round hole sieve with a hole spacing of 5 mm and 2 mm. Use the first-level walnut kernels with a hole diameter ≥5 mm for walnut oil pressing, and collect the second-level crushed walnut kernels with a hole diameter of 2mm≤≤5mm for later use.

[0007] S2: Bake the first-grade walnut kernels at a medium temperature of 70-85℃ for 30min. During the baking process, spray a small amount of clean water on the walnut kernels evenly and turn them over. Then adjust the temperature to a low temperature of 40-55℃ and bake for 60min, until the surface of the walnut kernels turns slightly yellow to yellowish brown, the walnut kernels are crisp and easy to crush, the nutty aroma is strong, and the moisture content is detected to be ≤3%. Then, the first-grade walnut kernels are fed into the feed port through the lifting feeding system, and the oil is discharged after low-pressure pressing by replenishing the pressure and maintaining the pressure. After the crude walnut oil passes through the automatic filtration system, a relatively clear pressed walnut oil is obtained.

[0008] S3: Bake the secondary walnut kernels at high temperature for 30 minutes, suck the secondary walnut kernels and decolorizing agent into the mixing tank through the suction mixing device, and the walnut oil enters the mixing tank through the oil guide pipe connected to the press, and the temperature of the walnut oil in the mixing tank is maintained at 2-5°C.

[0009] S4: Spray nitrogen into the mixing tank at a certain rate to ensure that the oil, crushed walnut kernels and decolorizing agent are fully contacted and mixed.

[0010] S5: After the mixed oil sample obtained in S4 is allowed to stand for 5 hours, it is filtered to obtain finished walnut oil.

[0011] By adopting the above technical scheme, walnut kernels can be quickly squeezed, and the secondary walnut kernels can be crushed and baked at high temperature, so that the aroma emitted from the secondary walnut kernels is mixed with the walnut oil, so that the walnut oil after decolorization can obtain a more obvious aroma enhancement effect, and the final walnut oil produced has a nutty aroma.

[0012] The invention is further configured as follows: the acceptance criteria for the walnut kernels are: the walnut kernels are naturally yellow-white without chemical fumigation and decolorization, the crude fat content is 55-60%, the impurities are 0.05%, and the moisture content is 4.0%-6.0%.

[0013] By adopting the above technical solution, by controlling the quality of walnut kernels and using walnut kernels with fuller particles and higher fat content for oil extraction, the extraction efficiency of walnut oil can be improved, the impurities in the walnut oil can be reduced, and the difficulty of subsequent walnut oil refining can be reduced.

[0014] The present invention is further configured as follows: the mass ratio of the crushed walnut kernels to the squeezed peach oil is 1:50-1:25, and the mass ratio of the decolorizing agent to the squeezed walnut oil is 1-1.5%.

[0015] By adopting the above technical solution and reasonably controlling the mass ratio of walnut oil, decolorizing agent and crushed walnut kernels, the decolorizing effect can be better and the absorption effect of walnut oil can be better, thereby avoiding waste.

[0016] The material suction and mixing device comprises: a mixing tank, which is provided with an oil guide pipe for introducing walnut oil into the inner cavity of the mixing tank; a decolorizing tank, which is provided with a piston, and the piston divides the inner cavity of the decolorizing tank into a pressure chamber and a pressure chamber, a decolorizing agent is added into the pressure chamber, and a feed pipe is connected to the lower end of the pressure chamber; an air guide pipe, one end of which is connected to the pressure chamber, and the other end is connected to the inner cavity of the mixing tank; a feeding pipe, which is used to feed secondary walnut kernel powder into the mixing tank, and a pressure pump is provided on the feeding pipe; a holding tank, which is used to hold walnut kernel powder, and the holding tank is connected to the inner cavity of the mixing tank through the feeding pipe; wherein the feed pipe is vertically connected to the feeding pipe, connects the pressure chamber with the feeding pipe, and the connection point is located between the inner cavity of the mixing tank and the pressure pump.

[0017] By adopting the above technical scheme, the mixing tank can mix the decolorizing agent and the crushed walnut kernels with each other, so that the crushed walnut kernels heated at high temperature are fully in contact with the walnut oil, and the nutty aroma produced by the crushed walnut kernels after high-temperature heating can be fully dissolved in the walnut oil. Before the crushed walnut kernels are added to the mixing tank, the low pressure formed in the discharge pipe can make the decolorizing agent in the pressure chamber quickly enter the feeding pipe and be pumped into the mixing tank together with the crushed walnut kernels.

[0018] The present invention is further configured as follows: a rotating rod is provided through the center of the piston, one end of the rotating rod is in the pressure chamber and connected to a wind blade, and the other end of the rotating rod is in the pressure chamber and connected to a stirring blade.

[0019] By adopting the above technical solution, through the arrangement of the rotating rod and the wind blades, when the decolorizing agent and the crushed walnut kernels are fed into the mixing tank through the feeding pipe, the external medium continuously enters the mixing tank, so that the air pressure in the mixing tank increases, and the gas in the mixing tank is blown to the wind blades in the pressure chamber through the air guide pipe, so that the rotation of the wind blade drives the rotating rod to rotate, and then drives the stirring blades in the pressure chamber. The decolorizing agent is stirred by the stirring blades, which can prevent the decolorizing agent from being blocked in the pressure chamber, so that the decolorizing agent can smoothly enter the feeding pipe through the discharge pipe, and because the pressure in the pressure chamber continues to increase, it can push the piston to move downward, so that the space in the pressure chamber continues to decrease as the piston descends, pushing the decolorizing agent in the pressure chamber to move into the discharge pipe.

[0020] The present invention is further configured as follows: a one-way valve is arranged on the air duct, the one-way valve includes a valve body, a guide channel is arranged at the center of the inner cavity of the valve body, a ball core with a larger aperture is arranged at the position of the guide channel, a clamping plate is arranged at the upper end of the inner cavity of the valve body, and a tightening member is arranged between the clamping plate and the ball core.

[0021] By adopting the above technical solution, when the pressure in the mixing tank continues to increase, the airflow in the mixing tank is pressed toward the ball core, so that the guide channel opens, the tightening member is compressed, and the airflow enters the pressure chamber through the gap between the ball core and the guide channel, blowing the wind blades in the pressure chamber to rotate, so that the air in the pressure chamber will not form a backflow due to excessive pressure, thereby improving the stability of the entire device.

[0022] The present invention is further configured as follows: a nitrogen pump is connected to the bottom of the mixing tank to blow nitrogen into the mixing tank.

[0023] By adopting the above technical solution, nitrogen is blown into the mixing tank and sprayed into the mixing tank at a certain rate. The tiny nitrogen bubbles can not only make the oil and crushed walnut kernels fully contact and mix, but also isolate the air to avoid oil oxidation.

[0024] The present invention is further configured as follows: the wind blades are arranged at the pipe opening position of the air guide pipe.

[0025] By adopting the above technical solution, the airflow blown out through the air guide pipe can face the wind blades directly to drive the wind blades.

[0026] The present invention is further configured as follows: a stirring rod is provided in the inner cavity of the mixing tank, an extension rod is provided on the stirring rod, and the extension rod rotates with the stirring rod and stirs the mixture in the mixing tank.

[0027] By adopting the above technical solution, the mixture in the mixing tank can be further fully stirred and mixed by the stirring rod, thereby improving the efficiency of walnut oil in absorbing fragrance, accelerating the absorption speed of the decolorizing agent, and shortening the entire decolorization time.

[0028] The present invention is further configured as follows: an empty shell is provided at the bottom of the stirring rod, the inner cavity of the empty shell is connected to the nitrogen pump, the wall surface of the empty shell is equidistantly provided with oblique exhaust holes, and the nitrogen in the nitrogen pump is discharged into the inner cavity of the mixing tank through the oblique exhaust holes.

[0029] By adopting the above technical solution, nitrogen is sprayed into the mixing tank through the oblique exhaust hole, so that the entire stirring rod generates a reverse impulse, so that the stirring rod can rotate with the blowing of nitrogen to stir the mixture in the mixing tank.

[0030] The invention has the beneficial effects of: by heating the secondary walnut kernels at high temperature, the fragrance produced by the secondary walnut kernels is dissolved in the walnut oil, thereby improving the nutty fragrance of the walnut oil, and the walnut kernels with poor quality can be efficiently utilized, reducing the loss and storage cost.

[0031] By setting up the suction mixing device, the secondary crushed walnut kernels and the decolorizing agent can be quickly sucked into the mixing tank to be fully mixed with the walnut oil, thereby improving the mixing efficiency of the decolorizing agent and the walnut oil and promoting the mixing efficiency between the crushed walnut kernels and the walnut oil.

[0032] By arranging the nitrogen pump and the stirring rod, the stirring rod can be driven to stir the mixture in the mixing tank while nitrogen is introduced into the mixing tank, thereby further improving the mixing efficiency in the mixing tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0034] Figure 2 It is a front view of the present invention;

[0035] Figure 3 It is a cross-sectional view along the AA direction of the present invention;

[0036] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at B in the middle;

[0037] Figure 5 It is a schematic diagram of the cross section of the hollow shell of the present invention;

[0038] Figure 6 For the present invention Figure 3 Enlarged schematic diagram of the structure at point C in the middle.

[0039] In the figure: 1. mixing tank; 2. oil guide pipe; 3. decolorization tank; 4. piston; 401. pressure chamber; 402. pressure chamber; 5. one-way valve; 501. valve body; 502. flow guide channel; 503. ball core; 504. clamping plate; 505. tightening member; 6. air guide pipe; 7. feeding pipe; 8. pressure pump; 9. support column; 10. containing tank; 11. rotating rod; 12. wind blade; 13. stirring blade; 14. feeding pipe; 15. nitrogen pump; 16. stirring rod; 17. extension rod; 18. empty shell; 19 oblique exhaust hole; 20. fixing ring; 21. ball head; 22. pressure member. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0041] A method for flavoring squeezed walnut oil using crushed walnut kernels comprises the following steps:

[0042] S1: Select fully mature, clean, newly harvested peeled walnut kernels of the year, use a grinding mill to grind the walnut kernels to a particle size of 10-20mm, and then use a double-layer round hole sieve with a hole spacing of 5mm and 2mm to screen the walnut kernels. The first-level walnut kernels with a hole diameter of ≥5mm are used for walnut oil pressing, and the second-level crushed walnut kernels with a hole diameter of 2mm≤≤5mm are collected for standby use. The acceptance criteria for walnut kernels are natural yellow-white without chemical fumigation and bleaching, crude fat content of 55-60%, impurities of 0.05%, and moisture content of 4.0%-6.0%.

[0043] The walnut kernels are crushed into small particles by the crushing device. The larger walnut kernel particles are selected by the screening device for pressing, while the smaller walnut kernels are used to flavor the walnut oil later. By controlling the quality of the walnut kernels and using walnut kernels with fuller particles and higher fat content for oil extraction, the extraction efficiency of walnut oil can be improved, the impurities in the walnut oil can be reduced, and the difficulty of subsequent walnut oil refining can be reduced.

[0044] S2: Bake the first-grade walnut kernels at a medium temperature of 70-85℃ for 30min. During the baking process, spray a small amount of clean water on the walnut kernels evenly and turn them over. Then adjust the temperature to a low temperature of 40-55℃ and bake for 60min, until the surface of the walnut kernels turns slightly yellow to yellowish brown, the walnut kernels are crisp and easy to crush, the nutty aroma is strong, and the moisture content is detected to be ≤3%. Then, the first-grade walnut kernels are fed into the feed port through the lifting feeding system, and the oil is discharged after low-pressure pressing by replenishing the pressure and maintaining the pressure. After the crude walnut oil passes through the automatic filtration system, a relatively clear pressed walnut oil is obtained.

[0045] After medium-temperature baking, the first-grade walnut kernels can improve the subsequent oil extraction rate and fully destroy the internal structure of the walnut kernels. During the baking process, spraying a small amount of water evenly on the walnut kernels can prevent the walnut kernels from being burned due to uneven heating during baking.

[0046] S3: The secondary walnut kernels are baked at high temperature for 30 minutes, and the secondary walnut kernels and the decolorant are sucked into the mixing tank 1 through the suction mixing device, and the walnut oil enters the mixing tank 1 through the oil guide pipe 2 connected to the press, and the temperature of the walnut oil in the mixing tank 1 is maintained at 2-5° C. The mass ratio of the crushed walnut kernels to the pressed walnut oil is 1:50-1:25, and the mass ratio of the decolorant to the pressed walnut oil is 1-1.5%.

[0047] By reasonably controlling the mass ratio of walnut oil, decolorizer and crushed walnut kernels, the decolorization effect can be better and the absorption effect of walnut oil can be better, thus avoiding waste.

[0048] S4: Spray nitrogen into the mixing tank 1 at a certain rate to make the oil fully contact with the crushed walnut kernels and the decolorizing agent.

[0049] Increase the contact area between walnut oil and decolorizing agent, walnut oil and crushed walnut kernels, promote the absorption of decolorizing agent, and speed up the dissolution efficiency of the aroma in walnut oil.

[0050] S5: After the mixed oil sample obtained in S4 is allowed to stand for 5 hours, it is filtered to obtain finished walnut oil.

[0051] The decolorizing agent and the crushed walnut kernels are allowed to settle downward by standing, while the walnut oil above is collected again through the oil guide pipe 2.

[0052] The material suction mixing device is used to mix the walnut oil, decolorizing agent and secondary walnut kernels.

[0053] like Figure 1 and Figure 2 As shown, the material suction mixing device includes: a mixing tank 1, which is supported by a supporting rod, and an oil guide pipe 2 is provided on the mixing tank 1 for introducing walnut oil into the inner cavity of the mixing tank 1; a decolorizing tank 3, in which a decolorizing agent is added, and a feed pipe 14 is connected to the lower end of the decolorizing tank 3; an air guide pipe 6, one end of which is connected to the decolorizing tank 3, and the other end is connected to the inner cavity of the mixing tank 1; a feeding pipe 7, which is used to feed secondary walnut kernel powder into the mixing tank 1, and a pressure pump 8 is provided on the feeding pipe 7; a holding tank 10, which is used to hold walnut kernel powder, and the holding tank 10 is connected to the inner cavity of the mixing tank 1 through the feeding pipe 7; wherein, the feed pipe 14 is vertically connected to the feeding pipe 7, connects the pressure chamber 402 with the feeding pipe 7, and the connection point is located between the inner cavity of the mixing tank 1 and the pressure pump 8.

[0054] The walnut oil produced after pressing the first-level walnut kernels enters the mixing tank 1 through the oil guide pipe 2, and the second-level walnut kernels enter the feeding pipe 7 from the containing tank 10 through the pressure pump 8. When passing through the feeding pipe 7, the flow velocity in the feeding pipe 7 increases and the pressure decreases, so that the pressure in the discharge pipe 14 interconnected with the feeding pipe 7 is greater than the pressure in the feeding pipe 7, so that the decolorant in the decolorization tank 3 quickly enters the feeding pipe 7 through the discharge pipe 14.

[0055] Secondly, as the external medium is continuously introduced into the mixing tank 1, the pressure in the mixing tank 1 is continuously increased, so that the airflow in the mixing tank 1 enters the decolorizing tank 3 through the air duct 6, pressing the decolorizing agent in the decolorizing tank 3 downward, so that the decolorizing agent in the decolorizing tank 3 can further quickly enter the discharge pipe 14.

[0056] The decolorant and the crushed walnut kernels can be fed synchronously by a pressure pump 8, thereby increasing the feeding speed of the decolorant and the crushed walnut kernels and promoting the mixing efficiency of the decolorant and the crushed walnut kernels.

[0057] like Figure 3 As shown, a piston 4 is installed in the decolorizing tank 3, and the piston 4 divides the inner cavity of the decolorizing tank 3 into a pressure chamber 401 and a pressure chamber 402, and a rotating rod 11 is inserted through the center of the piston 4. The two ends of the rotating rod 11 are respectively in the pressure chamber 401 and the pressure chamber 402, and one end of the rotating rod 11 in the pressure chamber 401 is rotatably connected to the wind blade 12, and one end of the rotating rod 11 in the pressure chamber 402 is connected to the stirring blade 13. The airflow introduced through the air guide 6 blows the wind blade 12 to rotate, drives the rotating rod 11 to rotate, and then causes the stirring blade 13 to rotate, stirs the decolorant in the pressure chamber 402, and prevents the decolorant from being blocked. At the same time, the pressure chamber 401 with gradually increasing pressure causes the piston 4 to continuously move in the direction of compressing the volume of the pressure chamber 402, so that the decolorant in the pressure chamber 402 can be concentrated at the nozzle position connected to the discharge pipe 14, and the speed of the decolorant entering the discharge pipe 14 is increased.

[0058] like Figure 3 As shown, a one-way valve 5 is arranged on the air guide pipe 6. Through the setting of the one-way valve 5, the airflow entering the decolorization tank 3 will not flow back, and only the airflow in the mixing tank 1 can enter the decolorization tank 3 through the one-way valve 5.

[0059] Further, such as Figure 6 As shown, the one-way valve 5 specifically includes a valve body 501, a guide channel 502 with a smaller aperture than other sections of the valve body 501 is processed in the middle section of the valve body 501, and a ball core 503 is arranged on the upper part of the guide channel 502, a clamping plate 504 is fixedly installed at the upper outlet position of the valve body 501, and a plurality of through holes are arranged on the clamping plate 504, and a tightening member 505 is connected between the clamping plate 504 and the ball core 503.

[0060] In this embodiment, the tightening member 505 is specifically a recoil spring. After the airflow flowing out of the mixing tank 1 enters the air duct 6, it passes into the valve body 501 of the one-way valve 5, which can push the ball core 503 open, compress the tightening member 505, and then enter the pressure chamber 401 through the one-way valve 5. However, the airflow in the pressure chamber 401 cannot pass through the one-way valve 5 due to the obstruction of the ball core 503.

[0061] The one-way valve 5 can prevent the airflow in the decolorizing tank 3 from flowing back, so that the piston 4 can always move downward, thereby promoting the decolorizing agent to quickly enter the feeding pipe.

[0062] like Figure 3As shown, a nitrogen pump 15 is provided at the bottom of the mixing tank 1. A certain rate of nitrogen is introduced into the mixing tank 1 through the nitrogen pump 15, which can speed up the mixing of the substances in the mixing tank 1. The nitrogen pressurization can improve the efficiency of the oil to absorb the fragrance, and the absorption efficiency of the decolorant can also be greatly improved. At the same time, after the nitrogen passes through the walnut oil, fine bubbles are generated, and the decolorant and the secondary walnut kernel powder are wrapped, so that the walnut oil is more fully contacted and mixed with it. The excess nitrogen enters the air guide 6 after passing through the walnut oil, and can also pressurize the piston 4 and drive the wind blade 12 to rotate.

[0063] Furthermore, an empty shell 18 is connected above the nitrogen pump 15 , a stirring rod 16 is connected to the empty shell 18 , and an extension rod 17 is connected to the stirring rod 16 . The empty shell 18 and the stirring rod 16 are driven to rotate by nitrogen blowing to stir the material in the mixing tank 1 .

[0064] Specifically, Figure 4 and Figure 5 As shown, the wall of the empty shell 18 is evenly distributed with oblique exhaust holes 19, and the nitrogen is discharged through the oblique exhaust holes 19, and the generated recoil force causes the entire empty shell 18 to rotate. A fixing ring 20 is set at the bottom of the empty shell 18, and the fixing ring 20 is rotatably set on the bottom surface of the mixing tank 1, and the fixing ring 20 can limit the position of the empty shell 18.

[0065] Furthermore, a ball head 21 is provided in the hollow shell 18, and the ball head 21 is connected to a pressure piece 22, wherein the pressure piece 22 is specifically a tightening spring, which is used to tighten the ball head 21 downward. After the ball head 21 is pushed open by the nitrogen pump 15, the pressure piece 22 is compressed, and the nitrogen enters the inner cavity of the hollow shell 18 and is discharged through the oblique exhaust hole 19 on the wall of the hollow shell 18.

[0066] The entire stirring rod 16 is driven by the recoil force of the nitrogen, which reduces energy consumption. At the same time, the nitrogen is discharged into the mixing tank 1, which can promote the decolorization efficiency and aroma absorption efficiency of the walnut oil in the mixing tank 1.

[0067] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for flavoring squeezed walnut oil using crushed walnut kernels, characterized in that: The following steps are involved: S1: Select fully mature, clean, peeled walnut kernels newly harvested that year, grind them into particles of 10-20 mm using a grinding mill, and then sieve the walnut kernels using a double-layer round hole sieve with a hole spacing of 5 mm and 2 mm. Use the first-level walnut kernels with a hole diameter of ≥5 mm for walnut oil pressing, and collect the second-level crushed walnut kernels with a hole diameter of 2 mm≤≤5 mm for later use; S2: Bake the first-grade walnut kernels at a medium temperature of 70-85°C for 30 minutes, spray a small amount of water on the walnut kernels evenly during the baking process and turn them over, then adjust the temperature to 40-55°C and bake at a low temperature for 60 minutes, until the surface of the walnut kernels turns slightly yellow to yellow-brown, the walnut kernels are brittle and easy to crush, the nut aroma is strong, and the moisture content is ≤3%, then feed the first-grade walnut kernels into the feed port through the lifting feeding system, and then press at low pressure to produce oil, and the crude walnut oil passes through the automatic filtering system to obtain relatively clear pressed walnut oil; S3: roasting the secondary walnut kernels at high temperature for 30 minutes, sucking the secondary walnut kernels and the decolorizing agent into the mixing tank (1) through the suction mixing device, and the walnut oil enters the mixing tank (1) through the oil guide pipe (2) connected to the press, and the temperature of the walnut oil in the mixing tank (1) is maintained at 2-5°C; S4: spraying nitrogen into the mixing tank (1) at a certain rate to allow the oil to fully contact and mix with the crushed walnut kernels and the decolorizing agent; S5: After the mixed oil sample obtained in S4 is allowed to stand for 5 hours, it is filtered to obtain finished walnut oil.

2. The method for flavoring squeezed walnut oil using crushed walnut kernels according to claim 1, characterized in that: The acceptance criteria for walnut kernels are: naturally yellow-white without chemical fumigation and bleaching, crude fat content of 55-60%, impurities of 0.05%, and moisture content of 4.0%-6.0%.

3. The method for flavoring squeezed walnut oil using crushed walnut kernels according to claim 1, characterized in that: The mass ratio of crushed walnut kernels to pressed peach oil is 1:50-1:25, and the mass ratio of decolorizing agent to pressed walnut oil is 1-1.5%.

4. A material suction and mixing device, specifically used in a method for flavoring squeezed walnut oil using crushed walnut kernels as described in claims 1 to 3, characterized in that: include: A mixing tank (1), wherein the mixing tank (1) is provided with an oil guide pipe (2) for introducing walnut oil into the inner cavity of the mixing tank (1); A decolorizing tank (3), wherein a piston (4) is arranged in the decolorizing tank (3), wherein the piston (4) divides the inner cavity of the decolorizing tank (3) into a pressure cavity (401) and a pressure-receiving cavity (402), wherein a decolorizing agent is added into the pressure-receiving cavity (402), and a feed pipe (14) is connected to the lower end of the pressure cavity (401); An air guide pipe (6), one end of which is connected to the pressure chamber (401) and the other end of which is connected to the inner cavity of the mixing tank (1); A feeding pipeline (7) is used to feed the secondary walnut kernel powder into the mixing tank (1), and a pressure pump (8) is provided on the feeding pipeline (7); A holding tank (10) for holding walnut kernel powder, wherein the holding tank (10) is connected to the inner cavity of the mixing tank (1) via the feeding pipe (7); The feed pipe (14) is vertically connected to the feed pipe (7) to connect the pressure chamber (402) with the feed pipe (7), and the connection point is located between the inner cavity of the mixing tank (1) and the pressure pump (8).

5. The material suction mixing device according to claim 4 is characterized in that: A rotating rod (11) is provided through the center of the piston (4); one end of the rotating rod (11) is located in the pressure chamber (401) and is connected to a wind blade (12); and the other end of the rotating rod (11) is located in the pressure chamber (402) and is connected to a stirring blade (13).

6. The material suction mixing device according to claim 4 is characterized in that: The air guide pipe (6) is provided with a one-way valve (5), the one-way valve (5) comprising a valve body (501), a flow guide channel (502) being provided at the center of the inner cavity of the valve body (501), a ball core (503) with a larger aperture being provided at the position of the flow guide channel (502), a clamping plate (504) being provided at the upper end of the inner cavity of the valve body (501), and a tightening member (505) being provided between the clamping plate (504) and the ball core (503).

7. The material suction mixing device according to claim 4 is characterized in that: The bottom of the mixing tank (1) is connected to a nitrogen pump (15) for blowing nitrogen into the mixing tank (1).

8. The material suction mixing device according to claim 5, characterized in that: The wind blade (12) is arranged at the pipe opening position of the air guide pipe (6).

9. The material suction mixing device according to claim 7, characterized in that: The inner cavity of the mixing tank (1) is provided with a stirring rod (16), and an extension rod (17) is provided on the stirring rod (16). The extension rod (17) rotates with the stirring rod (16) and stirs the mixture in the mixing tank (1).

10. The material suction mixing device according to claim 9, characterized in that: An empty shell (18) is provided at the bottom of the stirring rod (16); the inner cavity of the empty shell (18) is connected to the nitrogen pump (15); oblique exhaust holes (19) are evenly distributed on the wall of the empty shell (18); and the nitrogen in the nitrogen pump (15) is discharged into the inner cavity of the mixing tank (1) through the oblique exhaust holes (19).

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