A system and method for producing a rich flavor oil

Abstract

The application belongs to the field of oil and fat deep processing, and discloses a system and a method for preparing concentrated flavor oil. The system comprises an enzymolysis device, a horizontal centrifuge, an enzymolysis liquid temporary storage tank, an embedding device, conveying equipment and a pressurized low-temperature seed frying device. The system and the method of the application obtain an enzymolysis liquid oil material body rich in concentrated flavor oil flavor precursor substances through the settings of pre-embedding, reinforced embedding and infiltration embedding, and the enzymolysis liquid oil material body is subjected to pressurized low-temperature seed frying, thereby avoiding the problem of high-temperature generation of carcinogen benzene (alpha) pyrene.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of oil deep processing, and more particularly relates to a system and method for preparing concentrated flavor oil. BACKGROUND

[0002] With the continuous improvement of people's living standards, the consumption concept of residents has changed greatly, from eating light and tasteless salad oil to eating traditional concentrated flavor rapeseed oil, peanut oil and other concentrated flavor oil. Its unique flavor - rich aroma, smooth taste, other edible oils cannot replace it, and it is loved by most residents in China.

[0003] Research has found that the flavor of concentrated flavor oil is mainly caused by the Maillard reaction of proteins and carbohydrates in oilseeds during processing. The traditional concentrated flavor oil production process is: raw material - pretreatment - high temperature roasting - small oil press - filtration - concentrated flavor edible oil. The Maillard reaction is generated by high temperature roasting to improve the concentrated flavor. Due to the excessive pursuit of flavor, high temperature roasting is easy to produce and cause the content of carcinogen benzo (a) pyrene to exceed the standard. Research has found that when the roasting temperature exceeds 130 DEG C, the content of benzo (a) pyrene will increase significantly. Long time high temperature roasting will produce burnt bitter taste, resulting in insufficient rich and mellow flavor of traditional pressing process. High temperature roasting will also cause most of the soluble proteins in the cake to denature into insoluble proteins, resulting in low utilization rate of the cake and most of it being used as feed. Due to the uneven quality of raw materials and high temperature roasting, it is easy to produce and cause the content of carcinogen benzo (a) pyrene and other physical and chemical indicators to exceed the standard.

[0004] Food is the basis of the people, and safety is the first priority. Due to the uneven quality of raw materials and traditional high temperature roasting, the quality of concentrated flavor oil is poor, which is easy to cause safety risk factors and other physical and chemical indicators to exceed the standard, and long-term consumption of the concentrated flavor oil will harm the health of consumers. Based on the above problems, a new system and method for preparing concentrated flavor oil are urgently needed. SUMMARY

[0005] The purpose of the present application is to overcome the shortcomings of the prior art and provide a system and method for preparing concentrated flavor oil. The system and method of the present application obtain an enzymatic hydrolysate oil material body rich in concentrated flavor oil flavor precursor substances by setting pre-embedding, reinforced embedding and infiltration embedding, and pressurized low temperature roasting of the enzymatic hydrolysate oil material body, avoiding the problem of high temperature producing carcinogen benzo (a) pyrene.

[0006] In order to achieve the above purpose, the present application provides a system for preparing concentrated flavor oil, which comprises an enzymatic hydrolysis device, a horizontal centrifuge, an enzymatic hydrolysate temporary storage tank, an embedding device, a conveying device and a pressurized low temperature roasting device.

[0007] The enzymolysis device comprises an enzymolysis tank and a colloid mill; the enzymolysis tank comprises a top inlet, an enzyme liquid feeding port, a pH adjusting liquid inlet, a stirring device, an enzymolysis steam heating pipe and an enzymolysis mixed liquid outlet; the colloid mill is communicated with the top inlet; the stirring device is arranged in the interior of the enzymolysis tank; the enzymolysis steam heating pipe is arranged on the interior side wall of the enzymolysis tank; the enzymolysis mixed liquid outlet, a horizontal centrifuge and the enzyme liquid temporary storage tank are sequentially connected;

[0008] The embedding device comprises an embedding tank and an embedding main pipe; the embedding tank comprises, from top to bottom, an oil feeding hopper, a feeder one, an outlet of an embedding branch pipe one, an embedding roller pair, an outlet of an embedding branch pipe two, a reinforced embedding roller pair, an infiltration chamber and a feeder two; the inlet of the infiltration chamber is provided with an outlet of the enzyme liquid nozzle, and the interior side wall of the infiltration chamber is provided with an infiltration steam heating pipe; the outlet of the enzyme liquid temporary storage tank is communicated with the inlet of the embedding main pipe through a centrifugal pump; the outlet of the embedding main pipe is divided into three paths, one of which is connected with the inlet of the embedding branch pipe one, one of which is connected with the inlet of the embedding branch pipe two, and the remaining one is connected with the inlet of the enzyme liquid nozzle;

[0009] The feeder two is connected with the pressurized low-temperature seed frying device through the conveying device.

[0010] The pressurized low-temperature seed frying device is used for pressurized low-temperature seed frying treatment on the enzyme liquid oil material body rich in concentrated aromatic oil flavor precursor substances obtained from the embedding device.

[0011] According to the application, preferably, the enzyme liquid temporary storage tank further comprises an overflow and a glass tube liquid level meter; the overflow is arranged at the top of the enzyme liquid temporary storage tank; and the glass tube liquid level meter is arranged on the exterior side wall of the enzyme liquid temporary storage tank.

[0012] According to the application, preferably, the stirring device comprises a motor and a stirring shaft.

[0013] According to the application, preferably, the enzyme liquid temporary storage tank further comprises an overflow and a glass tube liquid level meter; the overflow is arranged at the top of the enzyme liquid temporary storage tank; and the glass tube liquid level meter is arranged on the exterior side wall of the enzyme liquid temporary storage tank.

[0014] According to the application, preferably, the centrifugal pump, the embedding main pipe, the embedding branch pipe one and the embedding branch pipe two are multiple and have the same number; and the enzyme liquid nozzle is multiple and corresponds to 1-3 enzyme liquid nozzles for each embedding main pipe.

[0015] The outlet of the enzyme liquid temporary storage tank is communicated with the inlet of the corresponding embedding main pipe through each centrifugal pump; the outlet of each embedding main pipe is divided into three paths, one of which is connected with the inlet of the corresponding embedding branch pipe one, one of which is connected with the inlet of the corresponding embedding branch pipe two, and the remaining one is connected with the inlet of the corresponding enzyme liquid nozzle.

[0016] Valves are arranged between the inlet and outlet of each embedding sub-pipe, between the inlet and outlet of each embedding sub-pipe two, and between the inlet and outlet of each enzymatic liquid nozzle.

[0017] According to the application, preferably, the embedding tank further comprises an embedding scraper and a reinforced embedding scraper;

[0018] The embedding scraper is used to scrape the oil material blank and the enzymatic liquid adhered on the embedding roller pair into the reinforced embedding roller pair;

[0019] The reinforced embedding roller pair is used to scrape the oil material blank and the enzymatic liquid adhered on the reinforced embedding roller pair into the infiltration chamber.

[0020] According to the application, preferably, each of the embedding roller pair and the reinforced embedding roller pair is independently provided with a tension adjusting device.

[0021] In the application, the embedding roller pair and the reinforced embedding roller pair are both counter-rotating.

[0022] According to the application, preferably, the conveying device is an L-shaped en masse or a bucket elevator.

[0023] According to the application, preferably, the system further comprises a screw press.

[0024] According to the application, preferably, the pressurized low-temperature seed frying device comprises a seed frying cavity, a seed frying motor and a support seat;

[0025] The seed frying cavity comprises a feeding port, a nitrogen inlet, a seed frying steam pipe, a discharging port, a pressure relief port, a feeding closing valve, a safety valve and a pressure reducing valve;

[0026] The feeder two is connected with the feeding port through the conveying device;

[0027] The nitrogen inlet is connected with a nitrogen supply device;

[0028] The seed frying steam pipe is arranged inside the seed frying cavity;

[0029] The pressure reducing valve is used to realize pressure control of the seed frying cavity;

[0030] The seed frying motor is used to control the operation of the seed frying cavity;

[0031] The discharging port is connected with the screw press.

[0032] Another aspect of the application provides a method for preparing a rich and fragrant oil, which adopts the system for preparing a rich and fragrant oil, and comprises the following steps:

[0033] S1: mixing the enzymatic oil material with water to obtain a material-water mixture and feeding the material-water mixture into the colloid mill for grinding to obtain material slurry particles;

[0034] S2: feeding the material slurry particles, amylase and hot food grade acid-base adjusting liquid into the enzymatic hydrolysis tank and performing first mixing and stirring enzymatic hydrolysis to obtain a first enzymatic hydrolysis mixture; feeding protease into the enzymatic hydrolysis tank to perform second mixing and stirring enzymatic hydrolysis with the first enzymatic hydrolysis mixture, and enzyme inactivation to obtain a second enzymatic hydrolysis mixture; performing centrifugal treatment on the second enzymatic hydrolysis mixture to obtain an enzymatic supernatant rich in concentrated oil and fat flavor precursor substances and feeding the enzymatic supernatant into the enzymatic hydrolysate temporary storage tank;

[0035] S3: uniformly dropping the embedded oil material in the oil material feeding hopper into the pair of embedding rollers in the embedding tank, extruding the embedded oil material by the pair of embedding rollers, simultaneously, starting the centrifugal pump, and pumping the enzymatic supernatant rich in concentrated oil and fat flavor precursor substances into the pair of embedding rollers by the embedding sub-pipe 1 to obtain pre-embedded blanks;

[0036] continuing to extrude the pre-embedded blanks by the reinforced pair of embedding rollers, simultaneously, pumping the enzymatic supernatant rich in concentrated oil and fat flavor precursor substances into the pair of reinforced embedding rollers by the embedding sub-pipe 2 to obtain reinforced embedded blanks and drop the reinforced embedded blanks into the soaking chamber;

[0037] in the soaking chamber, atomizing and feeding the enzymatic supernatant rich in concentrated oil and fat flavor precursor substances into the soaking chamber by the enzymatic hydrolysate nozzle to perform soaking embedding on the reinforced embedded blanks to obtain enzymatic hydrolysate oil material bodies rich in concentrated oil and fat flavor precursor substances;

[0038] S4: feeding the enzymatic hydrolysate oil material bodies into the pressurized low-temperature seed frying device by the conveying equipment to perform pressurized low-temperature seed frying treatment to obtain fried material to be pressed and rich in concentrated oil and fat flavor.

[0039] According to the present application, preferably, in step S1:

[0040] the enzymatic oil material is oil cake and / or oil seeds;

[0041] the mixing time of the enzymatic oil material with water is 3-5 h;

[0042] the ratio of the enzymatic oil material to water is (2-4):1

[0043] the particle size of the material slurry particles is 20-60 μm.

[0044] According to the present application, preferably, in step S2:

[0045] the amylase is α-amylase and / or β-amylase for preparing concentrated oil and fat flavor precursor substances with high reducing sugar content;

[0046] The added amount of the amylase is 1%-3% of the enzymatic oil material;

[0047] The pH of the first enzymatic mixed solution is 4.5-8;

[0048] The conditions of the first mixed stirring enzymolysis include that the temperature is 40-60℃, the stirring speed is 10-30r / min, and the enzymolysis time is 2-3h;

[0049] The reducing sugar content of the first enzymatic mixed solution is 2.5%-10%;

[0050] The protease is at least one of the flavor protease with high amino acid content, trypsin, neutral protease, alkaline protease and complex protease; in the application, the protease can increase the content of the rich flavor oil flavor precursor amino acid in the second enzymatic mixed solution, and when the embedded oil material is rapeseed, the rich flavor rapeseed oil flavor precursor amino acid mainly includes lysine and glutamic acid;

[0051] The added amount of the protease is 1%-3% of the enzymatic oil material;

[0052] The pH of the second enzymatic mixed solution is 5.5-12; when the protease is alkaline protease, the optimum pH of the second enzymatic mixed solution is 9-12.

[0053] The conditions of the second mixed stirring enzymolysis include that the temperature is 40-60℃, the stirring speed is 10-30r / min, and the enzymolysis time is 2-4h;

[0054] The step S2 further includes that when the height of the liquid surface in the enzymolysis tank is 10%-30% of the height of the enzymolysis tank, the centrifugal treatment is stopped, and the residual enzymatic liquid and residue in the enzymolysis tank are discharged from the oil residue discharge port of the enzymolysis tank.

[0055] According to the application, preferably in step S3:

[0056] The embedded oil material is an oil seed with a water content of 7-9%;

[0057] The particle size of the pre-embedded blank is 3-8mm;

[0058] The time of the infiltrating embedding is 2-3h, and the temperature is 40-60℃;

[0059] The amount of the enzymatic supernatant rich in rich flavor oil flavor precursor substances is 0.5%-2% of the embedded oil material.

[0060] According to the application, preferably in step S4:

[0061] The pressure low-temperature stir-frying treatment condition includes: pressure is 0.5-1.0 Mpa, temperature is 80-100 DEG C, the rotation speed of stir-frying motor is 5-15 r / min, and the stir-frying time is 20-40 min.

[0062] The method further comprises oil extraction treatment on the stir-fried material rich in concentrated aroma oil flavor to obtain the concentrated aroma oil.

[0063] The technical scheme of the present application has the following beneficial effects:

[0064] The present application adds a certain amount of amylase and protease with high content of concentrated aroma oil flavor precursor substance to the oil slurry to obtain an enzyme hydrolysis mixture; the enzyme hydrolysis mixture is used for embedding the oil blank, and through pre-embedding, reinforced embedding and infiltration embedding, the enzyme hydrolysis mixture is embedded and infiltrated into the oil blank to obtain an enzyme hydrolysis liquid oil body rich in concentrated aroma oil flavor precursor substance; the enzyme hydrolysis liquid oil body is subjected to pressure low-temperature stir-frying, heat is fully utilized, the Maillard reaction is accelerated, and the carcinogen benzene (alpha) pyrene generated at high temperature is avoided. Finally, spiral pressing treatment is performed to obtain concentrated aroma oil.

[0065] The system and method of the present application are simple and feasible, and are a high-efficiency and safe strategy for preparing concentrated aroma oil.

[0066] Other features and advantages of the present application will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0067] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the several views, and in which:

[0068] Figure 1 A schematic diagram of a system for preparing concentrated aroma oil according to an embodiment of the present application is shown.

[0069] The reference signs are explained as follows:

[0070] A0 enzyme hydrolysis tank, A1 colloid mill, A2 motor, A3 enzyme liquid inlet, A4 pH adjusting liquid inlet,

[0071] A5 stirring shaft, A6 enzyme hydrolysis steam heating pipe, A7 liquid level sensor, A8 enzyme hydrolysis mixture outlet,

[0072] A9 oil residue discharge port;

[0073] B0 horizontal centrifuge;

[0074] C0 enzyme hydrolysis liquid temporary storage tank, C1 inlet of the enzyme hydrolysis liquid temporary storage tank, C2 overflow port, C3 glass tube liquid level meter, C4 outlet of the enzyme hydrolysis liquid temporary storage tank;

[0075] P1 centrifugal pump, P2 centrifugal pump;

[0076] D0 embedding tank, D1 oil feeding hopper, D2-1 / 2 embedding roller pair, D3 tightness adjusting device, D4-1 embedding scraper, D4-2 reinforced embedding scraper, D5-1 embedding pipe I, D5-2 embedding pipe II, D6-1 / 2 reinforced embedding roller pair, D7 enzyme solution nozzle, D8 infiltration steam heating pipe, D9-1 feeder I, D9-2 feeder II, D10 infiltration chamber, D11 embedding main pipe;

[0077] F valve;

[0078] E0 conveying device, E1 conveying device feeding port, E2 conveying device discharging port;

[0079] F0 pressurized low-temperature seed frying device, F1 discharging port, F2 nitrogen inlet, F3 safety valve, F4 pressure reducing valve, F5 seed frying cavity, F6 feeding closing valve, F7 seed frying steam pipe, F8 seed frying motor, F9 pressure relief port, F10 discharging port, F11 support seat, T temperature table, P pressure table. DETAILED DESCRIPTION

[0080] The preferred embodiments of the present application will be described in more detail below. Although the preferred embodiments of the present application are described below, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present application can be more thoroughly and completely conveyed to those skilled in the art, and the scope of the present application can be fully conveyed to those skilled in the art.

[0081] Example 1

[0082] The present embodiment provides a system for preparing a fragrant oil, as shown in Figure 1 The system includes an enzymatic hydrolysis device, a horizontal centrifuge B0, an enzymatic hydrolysate temporary storage tank C0, an embedding device, a conveying device E0, and a pressurized low-temperature seed frying device F0.

[0083] The enzymatic hydrolysis device includes an enzymatic hydrolysis tank A0 and a colloid mill A1; the enzymatic hydrolysis tank A0 includes a top inlet, an enzyme solution feeding port A3, a pH adjusting solution inlet A4, a stirring device, an enzymatic hydrolysis steam heating pipe A6, an enzymatic hydrolysis mixed solution discharging port A8, a liquid level sensor A7, and an oil residue discharging port A9; the colloid mill A1 is in communication with the top inlet; the stirring device is arranged inside the enzymatic hydrolysis tank A0 and includes a motor A2 and a stirring shaft A5; the enzymatic hydrolysis steam heating pipe A6 is arranged on the inner side wall of the enzymatic hydrolysis tank A0; the liquid level sensor A7 is arranged on the inner side wall of the enzymatic hydrolysis tank A0; and the oil residue discharging port A9 is arranged at the bottom of the side wall of the enzymatic hydrolysis tank A0.

[0084] The enzymatic hydrolysis mixture outlet A8, the horizontal centrifuge B0, and the inlet of the enzymatic hydrolysis mixture storage tank C0 are connected in sequence.

[0085] The embedding device includes an embedding tank D0 and two embedding main pipes D11; the embedding tank D0 includes, from top to bottom, an oil feed hopper D1, a feeder D9-1, the outlets of two embedding branch pipes D5-1, an embedding roller pair D2-1 / 2, the outlets of two embedding branch pipes D5-2, a reinforced embedding roller pair D4-2, an impregnation chamber D10, and a feeder D9-2; the inlet of the impregnation chamber D10 is provided with four hydrolysate nozzles D7 for discharge, and the inner sidewall of the impregnation chamber D10 is provided with an impregnation steam heating pipe D8;

[0086] There are two centrifugal pumps; each embedded main tube D11 corresponds to two enzymatic hydrolysate nozzles D7;

[0087] The outlet of the enzymatic hydrolysate storage tank C0 is connected to the inlet of the corresponding embedding main pipe D11 through each centrifugal pump; the outlet of each embedding main pipe D11 is divided into three paths, one path is connected to the inlet of the corresponding embedding branch pipe one D5-1, one path is connected to the inlet of the corresponding embedding branch pipe two D5-2, and the remaining path is connected to the inlet of the corresponding enzymatic hydrolysate nozzle D7.

[0088] A valve F is provided between the inlet and outlet of each embedding sub-pipe D5-1, between the inlet and outlet of each embedding sub-pipe D5-2, and between the inlet and outlet of each enzymatic hydrolysate nozzle D7;

[0089] The embedding tank D0 further includes an embedding scraper D4-1 and a reinforced embedding scraper D4-2; the embedding scraper D4-1 is used to scrape the oilseed preforms and enzymatic hydrolysate adhering to the embedding roller pair D2-1 / 2 into the space between the reinforced embedding roller pair D6-1 / 2; the reinforced embedding roller pair D6-1 / 2 is used to scrape the oilseed preforms and enzymatic hydrolysate adhering to the reinforced embedding roller pair D6-1 / 2 into the impregnation chamber D10;

[0090] Each of the embedding roller pair D2-1 / 2 and the reinforced embedding roller pair D6-1 / 2 is independently equipped with a tension adjustment device D3;

[0091] The enzymatic hydrolysate storage tank C0 also includes an overflow port C2 and a glass tube level gauge C3; the overflow port C2 is located at the top of the enzymatic hydrolysate storage tank C0; the glass tube level gauge C3 is located on the outer side wall of the enzymatic hydrolysate storage tank C0.

[0092] The pressurized low-temperature seed roasting device F0 is used to perform pressurized low-temperature seed roasting on the enzymatic hydrolysate oil body obtained from the embedding device, and includes a seed roasting chamber F5, a seed roasting motor F8, and a support base F11.

[0093] The frying seed cavity comprises a discharging port F1, a nitrogen inlet F2, a frying seed steam pipe F7, a discharging port F10, a pressure relief port F9, a feeding closing valve F6, a safety valve F3 and a pressure reducing valve F4;

[0094] The feeding device D9-2 is connected with the discharging port through a conveying device E0, and the conveying device E0 is an L-shaped en masse scraper;

[0095] The nitrogen inlet F2 is connected with a nitrogen supply device;

[0096] The frying seed steam pipe F7 is arranged inside the frying seed cavity F5;

[0097] The pressure reducing valve F4 is used for realizing pressure control of the frying seed cavity F5;

[0098] The frying seed motor F8 is used for controlling the operation of the frying seed cavity F5;

[0099] The discharging port F10 is connected with a screw oil press.

[0100] The embodiment also provides a method for preparing a strong-flavor oil, which adopts the system and comprises the following steps:

[0101] S1: clean rapeseed cakes are soaked in clean water for 5 hours; after the cakes are absorbed and expanded, the colloid mill A1 is opened, and water and the absorbed and expanded cakes are slowly poured into the colloid mill A1, and the ratio of water to rapeseed cakes is 1:3. During the grinding process, the self-circulation pipe (not shown) of the colloid mill A1 is opened, so that the slurry is circulated and ground, and the particle size of the slurry is controlled to be 50 μm;

[0102] S2: the slurry particles, α-amylase (the addition amount is 2.5% of the rapeseed cakes) and a hot food grade acid-base adjusting solution are fed into the enzymolysis tank A0 and subjected to first mixed stirring enzymolysis (the temperature is 60°C, the stirring speed is 20 r / min, and the enzymolysis time is 3 hours), so as to obtain a first enzymolysis mixed solution (pH is 6); a protease (the addition amount is 2% of the rapeseed cakes) is fed into the enzymolysis tank A0 and subjected to second mixed stirring enzymolysis with the first enzymolysis mixed solution (the temperature is 50°C, the stirring speed is 20 r / min, and the enzymolysis time is 3 hours), so as to inactivate the enzyme and obtain a second enzymolysis mixed solution (pH is 6.5); the second enzymolysis mixed solution is subjected to centrifugal treatment, so as to obtain an enzymolysis supernatant rich in strong-flavor rapeseed oil flavor precursor substances and feed the enzymolysis supernatant into the enzymolysis liquid temporary storage tank C0; when the height of the liquid surface in the enzymolysis tank A0 is 15% of the height of the enzymolysis tank A0, the centrifugal treatment is stopped, and the remaining enzymolysis liquid and residues in the enzymolysis tank A0 are discharged from the enzymolysis tank A0 through the oil residue discharge port A9;

[0103] S3: The oil material with 8% moisture content in the oil material hopper D1 is evenly dropped between the embedding roller pairs D2-1 / 2 in the embedding tank D0, the embedding roller pairs D2-1 / 2 are used to extrude the embedding oil material, meanwhile, the centrifugal pumps P1, P2 are started, the valves F between the inlet and outlet of each embedding pipe D5-1 are opened, the embedding pipe D5-1 is used to pump the enzyme hydrolysis supernatant rich in concentrated aromatic oil flavor precursor substances into the embedding roller pairs D2-1 / 2, and a pre-embedding blank is obtained, the particle size is 3 mm; the embedding scraper D4-1 is used to scrape the oil material blank and the enzyme hydrolysis solution adhered to the embedding roller pairs D2-1 / 2 into the reinforced embedding roller pairs D6-1 / 2;

[0104] The blank falling from the upper part is continuously extruded by the reinforced embedding roller pairs D6-1 / 2, meanwhile, the valves between the inlet and outlet of each embedding pipe D5-2 are opened, the embedding pipe D5-2 is used to pump the enzyme hydrolysis supernatant rich in concentrated aromatic oil flavor precursor substances into the reinforced embedding roller pairs D6-1 / 2, the blank not completely embedded by the enzyme hydrolysis supernatant rich in concentrated aromatic oil flavor precursor substances is wrapped with the enzyme hydrolysis supernatant rich in concentrated aromatic oil flavor precursor substances, a reinforced embedding blank is obtained and falls into the infiltration chamber D10; the reinforced embedding scraper D4-2 is used to scrape the oil material blank and the enzyme hydrolysis solution adhered to the reinforced embedding roller pairs into the infiltration chamber D10;

[0105] In the infiltration chamber D10, the valves F between the inlet and outlet of each enzyme hydrolysis solution nozzle D7 are opened, the enzyme hydrolysis solution nozzle D7 is used to atomize and send the enzyme hydrolysis supernatant rich in concentrated aromatic oil flavor precursor substances into the infiltration chamber D10 to infiltrate and embed the blank falling from the upper part for 2 h, the temperature is 50℃, and an enzyme hydrolysis solution oil material body rich in concentrated aromatic rapeseed oil flavor precursor substances is obtained;

[0106] The amount of the enzyme hydrolysis supernatant rich in concentrated aromatic oil flavor precursor substances is 2% of the embedding oil material;

[0107] S4: The enzyme hydrolysis solution oil material body is sent into the lower discharge port of the pressurized low-temperature seed frying device F0 by the L-type en masse scraper, the feed closing valve F6 is closed, nitrogen is introduced into the seed frying cavity F5, the pressure in the seed frying cavity F5 is controlled by the pressure reducing valve F4 to maintain the pressure at 0.8 MPa, the oil material body is heated by the steam in the seed frying steam pipe F7, the temperature is maintained at 90℃, the seed frying motor F8 is started to maintain the rotating speed at 15 r / min, the seed frying time is 30 min. After the end, the pressure relief port F9 is slowly opened, the pressure in the seed frying cavity F5 is reduced to the room pressure, the discharge port F10 is opened, the fried material rich in concentrated aromatic rapeseed oil flavor is obtained, and the fried material is subjected to oil pressing treatment by a screw oil press to obtain concentrated aromatic rapeseed oil, and various physical and chemical indexes are detected.

[0108] Example 2

[0109] The present embodiment provides a method for preparing a rich-flavor oil, which adopts the system of embodiment 1, and comprises the following steps:

[0110] S1: soak clean peanut cake in water for 4.5 hours; after the cake absorbs water and swells, open the colloid mill A1, slowly pour the water and the above-mentioned swollen material into the colloid mill A1, and the ratio of water to peanut cake is 1:4. Open the self-circulation pipe of the colloid mill A1 during the grinding process to make the slurry circulate and grind, and control the particle size of the slurry to 35 μm;

[0111] S2: send the slurry particles, α-amylase (the addition amount is 2% of the peanut cake) and hot food grade acid-base adjusting solution into the enzymolysis tank A0 and perform first mixed stirring enzymolysis (the temperature is 50°C, the stirring speed is 20 r / min, and the enzymolysis time is 2.5 hours) to obtain a first enzymolysis mixed solution (pH is 5.5); send protease (the addition amount is 3% of the peanut cake) into the enzymolysis tank A0 to perform second mixed stirring enzymolysis with the first enzymolysis mixed solution (the temperature is 45°C, the stirring speed is 15 r / min, and the enzymolysis time is 4 hours), and then inactivate the enzyme to obtain a second enzymolysis mixed solution (pH is 7); perform centrifugal treatment on the second enzymolysis mixed solution to obtain an enzymolysis supernatant rich in rich-flavor peanut oil flavor precursor substances and send it into the enzymolysis liquid temporary storage tank C0; when the height of the liquid surface in the enzymolysis tank A0 is 20% of the height of the enzymolysis tank A0, stop the centrifugal treatment, and discharge the remaining enzymolysis liquid and residue in the enzymolysis tank A0 through the oil residue discharge outlet A9;

[0112] S3: uniformly drop the peanut kernels with a water content of 8% in the oil material feeding hopper D1 between the embedding roller pairs D2-1 / 2 in the embedding tank D0, use the embedding roller pairs D2-1 / 2 to extrude and embed the oil material, at the same time, start the centrifugal pumps P1 and P2, open the valves F between the inlet and outlet of each embedding sub-pipe D5-1, use the embedding sub-pipe D5-1 to pump the enzymolysis supernatant rich in rich-flavor oil flavor precursor substances into the embedding roller pairs D2-1 / 2 to obtain pre-embedding blanks with a particle size of 8 mm; use the embedding scraper D4-1 to scrape the oil material blanks and enzymolysis liquid adhered to the embedding roller pairs into the reinforced embedding roller pairs;

[0113] Continuing to use the reinforced embedding roller pair to extrude the blank sheet falling from above, at the same time, opening the valve between the inlet and outlet of each embedding branch pipe two, using the embedding branch pipe two D5-2 to pump the enzyme hydrolysate rich in concentrated fragrant oil flavor precursor into the reinforced embedding roller pair, wrapping the blank sheet not completely embedded with the enzyme hydrolysate rich in concentrated fragrant oil flavor precursor with the enzyme hydrolysate rich in concentrated fragrant oil flavor precursor, obtaining the reinforced embedding blank sheet and falling into the infiltration chamber D10; using the reinforced embedding scraper to scrape the oil material blank sheet and the enzyme hydrolysate adhering to the reinforced embedding roller pair into the infiltration chamber;

[0114] In the infiltration chamber D10, opening the valve F between the inlet and outlet of each enzyme hydrolysate nozzle D7, using the enzyme hydrolysate nozzle to atomize and send the enzyme hydrolysate rich in concentrated fragrant oil flavor precursor into the infiltration chamber to infiltrate and embed the blank sheet falling from above for 3h, the temperature is 50℃, obtaining the enzyme hydrolysate oil material body rich in concentrated fragrant peanut oil flavor precursor;

[0115] The amount of the enzyme hydrolysate rich in concentrated fragrant oil flavor precursor is 2% of the embedding oil material;

[0116] S4: using the L-shaped en masse scraper to send the enzyme hydrolysate oil material body into the lower discharge port of the pressurized low-temperature frying device F0, closing the feeding closing valve F6, introducing nitrogen into the frying cavity F5, using the pressure reducing valve F4 to control the pressure of the frying cavity to maintain the pressure at 0.9MPa, heating the oil material body by the steam in the frying steam pipe F7, maintaining the temperature at 100℃, starting the frying motor to maintain the rotating speed at 15r / min, and frying for 40min. After the end, slowly opening the pressure relief port F9, the pressure in the frying cavity is reduced to the room pressure, and then the discharge port is opened, obtaining the fried material rich in concentrated fragrant peanut oil flavor. After being pressed by a screw oil press, concentrated fragrant rapeseed oil is obtained, and various physical and chemical indexes are detected.

[0117] Comparative Example 1

[0118] In this comparative example, the traditional concentrated fragrant oil processing technology is used to process rapeseed oil, and the process flow is raw material-preprocessing-high temperature frying-seed pressing by a small oil press-filtering-concentrated fragrant edible oil.

[0119] The frying temperature is 150℃, the frying time is 30min, and various physical and chemical indexes are detected.

[0120] Comparative Example 2

[0121] In this comparative example, the traditional concentrated fragrant oil processing technology is used to process peanut kernels, and the process flow is raw material-preprocessing-high temperature frying-seed pressing by a small oil press-filtering-concentrated fragrant edible oil.

[0122] The roasting temperature was 160℃, the roasting time was 30 minutes, and various physical and chemical indexes were detected.

[0123] The key components of the flavor of the strong-flavor rapeseed oil of Example 1 and Comparative Example 1 are shown in Table 1. The detection method is as follows: solid-phase microextraction is performed on volatile compounds, and gas chromatography-mass spectrometry is used to detect the volatile compounds.

[0124] Table 1

[0125]

[0126]

[0127] As shown in Table 1, no carcinogen benzo(α)pyrene was detected in Example 1, and the content of the carcinogen benzo(α)pyrene in Comparative Example 1 was 2 μg / kg due to high-temperature roasting (roasting temperature 150℃). The strong-flavor peanut oil produced by the two processes has rich and mellow flavor, and the flavors are not obviously different. As shown in Table 1, there are 24 key components of the flavor of the strong-flavor rapeseed oil, and the components of Example 1 and Comparative Example 1 are roughly the same. In some key components, Example 1 is superior to Comparative Example 1.

[0128] The same detection was performed on Example 2 and Comparative Example 2, and it was found that no carcinogen benzo(α)pyrene was detected in Example 2, and the content of the carcinogen benzo(α)pyrene in Comparative Example 2 was 13 μg / kg due to high-temperature roasting (roasting temperature 160℃). The strong-flavor peanut oil produced by the two processes has rich and mellow flavor, and the flavors are not obviously different.

[0129] The above has described various embodiments of the present application, and the above description is exemplary, is not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A system for preparing a rich-tasting oil or fat, characterized by The system comprises an enzymatic hydrolysis device, a horizontal centrifuge, an enzymatic hydrolysate temporary storage tank, an embedding device, a conveying device and a pressurized low-temperature seed frying device. The enzymatic hydrolysis device comprises an enzymatic hydrolysis tank and a colloid mill; the enzymatic hydrolysis tank comprises a top inlet, an enzyme solution feeding port, a pH adjusting solution inlet, a stirring device, an enzymatic hydrolysis steam heating pipe and an enzymatic hydrolysis mixed solution outlet; the colloid mill is in communication with the top inlet; the stirring device is arranged inside the enzymatic hydrolysis tank; the enzymatic hydrolysis steam heating pipe is arranged on the inner side wall of the enzymatic hydrolysis tank; the enzymatic hydrolysis mixed solution outlet, the horizontal centrifuge and the enzymatic hydrolysate temporary storage tank are sequentially connected; The embedding device comprises an embedding tank and an embedding main pipe; the embedding tank comprises, from top to bottom, an oil material feeding hopper, a feeder one, an outlet of an embedding branch pipe one, an embedding roller pair, an outlet of an embedding branch pipe two, a reinforced embedding roller pair, an infiltration chamber and a feeder two; the inlet of the infiltration chamber is provided with an outlet of an enzymatic hydrolysate nozzle, and the inner side wall of the infiltration chamber is provided with an infiltration steam heating pipe; The centrifugal pump, the embedding main pipe, the embedding branch pipe one and the embedding branch pipe two are multiple and have the same number; the enzymatic hydrolysate nozzle is multiple and each embedding main pipe corresponds to 1-3 enzymatic hydrolysate nozzles; The outlet of the enzymatic hydrolysate temporary storage tank is in communication with the inlet of the corresponding embedding main pipe through each centrifugal pump; the outlet of each embedding main pipe is divided into three paths, one of which is connected with the inlet of the corresponding embedding branch pipe one, one of which is connected with the inlet of the corresponding embedding branch pipe two, and the remaining one is connected with the inlet of the corresponding enzymatic hydrolysate nozzle; Valves are arranged between the inlet and outlet of each embedding branch pipe one, between the inlet and outlet of each embedding branch pipe two and between the inlet and outlet of each enzymatic hydrolysate nozzle; The embedding tank further comprises an embedding scraper and a reinforced embedding scraper; the embedding scraper is used for scraping the oil material blanks and the enzymatic hydrolysate adhered to the embedding roller pair into the reinforced embedding roller pair; the reinforced embedding scraper is used for scraping the oil material blanks and the enzymatic hydrolysate adhered to the reinforced embedding roller pair into the infiltration chamber; the embedding roller pair and the reinforced embedding roller pair are each independently provided with a tension adjusting device; The pressurized low-temperature seed frying device is used for pressurized low-temperature seed frying treatment of the enzymatic hydrolysate oil material body obtained from the embedding device; The pressurized low-temperature seed frying device comprises a seed frying cavity, a seed frying motor and a support seat; The seed frying cavity comprises a feeding port, a nitrogen inlet, a seed frying steam pipe, a discharging port, a pressure relief port, a feeding closing valve, a safety valve and a pressure reducing valve; The feeder two is connected with the feeding port through the conveying device; The nitrogen inlet is connected with a nitrogen supply device; The seed frying steam pipe is arranged inside the seed frying cavity; The pressure reducing valve is used for realizing pressure control of the seed frying cavity; The seed frying motor is used for controlling the operation of the seed frying cavity.

2. The system for preparing a rich-tasting oil or fat according to claim 1, wherein, The enzymatic hydrolysis tank further comprises a liquid level sensor and an oil residue discharge port; the liquid level sensor is arranged on the inner side wall of the enzymatic hydrolysis tank; the oil residue discharge port is arranged on the bottom of the side wall of the enzymatic hydrolysis tank; The stirring device comprises a motor and a stirring shaft.

3. The system for preparing a rich-tasting oil or fat according to claim 1, wherein, The enzymatic hydrolysate temporary storage tank further comprises an overflow port and a glass tube liquid level meter; the overflow port is arranged on the top of the enzymatic hydrolysate temporary storage tank; the glass tube liquid level meter is arranged on the outer side wall of the enzymatic hydrolysate temporary storage tank.

4. The system for preparing a rich-tasting oil or fat according to claim 1, wherein The conveying device is an L-shaped scraper or a bucket elevator.

5. The system for preparing a rich-tasting oil or fat according to claim 1, wherein The system further comprises a screw press. 6.The system for preparing strong-flavor oil according to claim 5, wherein, The discharge port of the frying chamber is connected with the screw press.

7. A method of preparing a rich oil, characterized by, The method adopts the system for preparing strong-flavor oil according to any one of claims 1-6, and comprises the following steps: S1: mixing the enzymatic oil material with water to obtain a mixture and feeding the mixture into the colloid mill for grinding to obtain slurry particles; S2: feeding the slurry particles, amylase and hot food grade acid-base adjusting liquid into the enzymolysis tank and performing first mixing and stirring enzymolysis to obtain a first enzymolysis mixture; feeding protease into the enzymolysis tank to perform second mixing and stirring enzymolysis with the first enzymolysis mixture, and inactivate the enzyme to obtain a second enzymolysis mixture; performing centrifugal treatment on the second enzymolysis mixture to obtain an enzymolysis supernatant rich in strong-flavor oil flavor precursor substances and feeding the supernatant into the enzymolysis liquid temporary storage tank; S3: uniformly dropping the embedded oil material in the oil material feeding hopper into the gap between the embedding roller pairs in the embedding tank, extruding the embedded oil material by the embedding roller pairs, simultaneously, starting the centrifugal pump, and pumping the enzymolysis supernatant rich in strong-flavor oil flavor precursor substances into the gap between the embedding roller pairs by the embedding branch pipe 1 to obtain pre-embedded blanks; Continuously extruding the pre-embedded blanks by the reinforced embedding roller pairs, simultaneously, pumping the enzymolysis supernatant rich in strong-flavor oil flavor precursor substances into the gap between the reinforced embedding roller pairs by the embedding branch pipe 2 to obtain reinforced embedded blanks and drop the blanks into the soaking chamber; In the soaking chamber, atomizing and feeding the enzymolysis supernatant rich in strong-flavor oil flavor precursor substances into the soaking chamber by the enzymolysis liquid nozzle to perform soaking embedding on the reinforced embedded blanks to obtain enzymolysis liquid oil material bodies rich in strong-flavor oil flavor precursor substances; S4: feeding the enzymolysis liquid oil material bodies into the pressurized low-temperature frying device by the conveying device to perform pressurized low-temperature frying treatment to obtain fried material rich in strong-flavor oil flavor. 8.The method for preparing strong-flavor oil according to claim 7, wherein, In step S1: The enzymatic oil material is oil cake and / or oil seeds; The mixing time of the enzymatic oil material with water is 3-5h; The ratio of the enzymatic oil material to water is (2-4):1 The particle size of the slurry particles is 20-60μm; In step S2: The amylase is α-amylase and / or β-amylase for preparing strong-flavor oil flavor precursor substances with high reducing sugar content; The addition amount of the amylase is 1%-3% of the enzymatic oil material; The pH of the first enzymolysis mixture is 4.5-8; The conditions of the first mixing and stirring enzymolysis include temperature of 40-60℃, stirring speed of 10-30r / min, and enzymolysis time of 2-3h; The reducing sugar content of the first enzymolysis mixture is 2.5%-10%; The protease is at least one of flavor protease, trypsin, neutral protease, alkaline protease and complex protease for preparing strong-flavor oil flavor precursor substances with high amino acid content; The addition amount of the protease is 1%-3% of the enzymatic oil material; The pH of the second enzymolysis mixture is 5.5-12; The conditions of the second mixed stirring enzymolysis include a temperature of 40-60℃, a stirring speed of 10-30r / min, and an enzymolysis time of 2-4h; The step S2 further includes stopping the centrifugal treatment when the height of the liquid surface in the enzymolysis tank is 10%-30% of the height of the enzymolysis tank, and discharging the remaining enzymolysis liquid and residues in the enzymolysis tank through the oil residue discharge port of the enzymolysis tank; In step S3: The embedding oil material is an oil seed with a water content of 7-9%; The particle size of the pre-embedding blank is 3-8mm; The time of the infiltrating embedding is 2-3h, and the temperature is 40-60℃; The amount of the enzymolysis supernatant rich in concentrated aromatic oil flavor precursor substances is 0.5%-2% of the embedding oil material; In step S4: The conditions of the pressurized low-temperature stir-frying treatment include a pressure of 0.5-1.0Mpa, a temperature of 80-100℃, a stir-frying motor speed of 5-15r / min, and a stir-frying time of 20-40min; The method further includes an oil pressing treatment of the low-temperature stir-fried material rich in concentrated aromatic oil flavor, to obtain the concentrated aromatic oil.

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