Production process of coarse particle tomato powder

Abstract

The invention belongs to the technical field of food processing, and discloses a production process of coarse particle tomato powder. The process comprises the steps of feeding, material heating, conveying and filtering, high-pressure atomization, spray drying, fluidized bed cooling, material mixing, screening and packaging. The tomato sauce with the solid content of 36%-38% and the viscosity of 7-8 cm / 30 s is adopted as a raw material, and key process parameters such as the preheating temperature, atomization parameters (the aperture of a spraying piece is 1.4-2.0 mm, and the pressure is 10-20 MPa), the fluidized bed cooling temperature (20-25 DEG C) and the like are strictly controlled, so that the tomato sauce with the solid content of 36%-38% and the viscosity of 7-8 cm / 30 s is prepared. The prepared coarse tomato powder is high in lycopene content (more than or equal to 150mg / 100g), low in moisture content (less than or equal to 3.5%), uniform in particles, small in amount of fine powder below 120 meshes, rich in flavor and good in solubility and dispersity, and is suitable for the industrial fields of high-end foods such as soup bases, dusting powder, solid beverages and the like. The method is stable in process and suitable for large-scale production.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of food processing, and particularly relates to a production process of coarse-granular tomato powder. BACKGROUND

[0002] The application scenarios of tomato powder as a natural seasoning and a health functional food are continuously expanding. The common tomato powder products on the market mainly include fine powder, ordinary powder and large-granular powder, wherein the granularity size is a key index for distinguishing different types of tomato powder. The conventional tomato powder products generally have problems of poor solubility and uneven particle distribution, and in the production process, the loss of lycopene and the destruction of flavor substances are easily caused due to technical limitations, thereby affecting the quality and application value of the final product.

[0003] Coarse-granular tomato powder (particle size 150-500 μm) is more and more widely used in high-end food industry due to its excellent dispersibility, good solubility, high lycopene retention rate and flavor substances closer to fresh tomatoes. This kind of product is particularly suitable for the fields of soup, seasoning, solid beverage and health food raw materials, and can better maintain the natural color and flavor characteristics of tomatoes. In the prior art, such as CN101731534A, a production process of large-granular tomato powder is disclosed, in which tomato paste with a solid content of 36%-38% is heated to 75-80℃, and then pumped into a drying tower through a high-pressure pump, and then subjected to spray atomization and hot air drying treatment. Although this process simplifies the production process, it still has certain limitations in terms of particle size control, nutrient retention and production efficiency. Therefore, it is of great market significance and technical value to develop a new process which can realize the large-scale production of coarse-granular tomato powder while ensuring stable product quality and production efficiency. SUMMARY

[0004] One of the purposes of the present application is to provide a production process of coarse-granular tomato powder which can accurately control the particle size of the product; and the second purpose is to provide tomato powder with excellent solubility, high lycopene retention rate and flavor close to fresh tomatoes.

[0005] In one aspect, the present application provides a production process of coarse-granular tomato powder, comprising the following steps: S1, feeding: using tomato paste as raw material, and using a vertical screw pump to deliver the tomato paste to a material tank; S2, material heating: heating the tomato paste in the material tank through a preheater; S3, material delivery and filtration: delivering the heated tomato paste to a material temporary storage tank through a plunger pump, and then delivering the tomato paste to a high-pressure spray pump through a rotor pump and a double filter; S4, high pressure atomization: the tomato sauce is sent into an atomizer by the high pressure spray pump, a spray sheet with a pore diameter of 1.4-2.0 mm is used, and atomization is carried out under a spray pressure of 10-20 MPa; S5, spray drying: the atomized tomato sauce is dried under the action of hot air, the dried material is introduced into a first-stage vibration fluidized bed through the tower bottom, and moisture is separated by an air induction fan to obtain tomato powder; S6, fluidized bed cooling: the tomato powder is sent into a two-stage vibration fluidized bed for vibration scattering and temperature reduction, and the material temperature is controlled to be 20-25℃; S7, mixing: the cooled tomato powder is uniformly mixed with silicon dioxide in a mixing screw to obtain a coarse-grained tomato powder crude product; S8, screening: the coarse-grained tomato powder crude product is screened through a 20-40 mesh rotary vibration screen to obtain a coarse-grained tomato powder semi-finished product; S9, packaging: the semi-finished product is packaged to obtain the coarse-grained tomato powder.

[0006] Further, in the production process, the solid content of the tomato sauce in S1 is 36%-38%, and the viscosity is 7-8 cm / 30 s.

[0007] Further, in the production process, the heating temperature in S2 is 70-74℃ Further, in the production process, the addition amount of silicon dioxide in S7 is 1.65%-1.70% of the mass of the tomato sauce.

[0008] In another aspect, the coarse-grained tomato powder prepared by the production process of the application is also provided.

[0009] Further, the coarse-grained tomato powder has a lycopene content of ≥150 mg / 100 g and a moisture content of ≤3.5%.

[0010] Finally, a food composition containing the coarse-grained tomato powder of the application is also provided.

[0011] Further, the food composition is a soup base, a sprinkling powder, a solid beverage or a health food.

[0012] Compared with the prior art, the technical solution provided by the application has at least the following beneficial effects or advantages: (1) The present application significantly improves the retention rate of lycopene (≥ 150 mg / 100g) by optimizing the raw material indicators (solid content 36%-38%, viscosity 7-8 cm / 30s), precisely controlling the preheating temperature (70-74℃) and specific atomization parameters (spray piece aperture 1.4-2.0 mm, pressure 10-20 MPa), effectively reducing the product moisture content (≤3.5%), and giving the product a more rich flavor and sweet and sour taste closer to fresh tomatoes, and bright orange-red color.

[0013] (2) The present application uses a specific process combination, and the produced tomato powder has uniform granular morphology, and the coarse granular range is mostly coarse strip-shaped particles. Compared with the prior art product, the amount of fine powder below 120 mesh is significantly reduced (reduced by 5-10g), the density is moderate (0.55-0.59 g / mL), thereby having more excellent dispersibility, fluidity and solubility. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The appearance of different tomato powders is shown in the figure. A is 1# coarse granular tomato powder; B is 2# coarse granular tomato powder; C is 3# coarse granular tomato powder; D is 1# comparative agent; E is 2# comparative agent.

[0015] Figure 2 The microscopic results of different tomato powders are shown in the figure. A is 1# coarse granular tomato powder; B is 2# coarse granular tomato powder; C is 3# coarse granular tomato powder; D is 1# comparative agent; E is 2# comparative agent. DETAILED DESCRIPTION

[0016] In the following, the technical solutions of the present application will be described in conjunction with examples, but the present application is not limited to the following examples.

[0017] In order for those skilled in the art to better understand the technical solutions of the present application and to implement them, the present application will be further described in conjunction with specific examples and drawings, but the examples are not limiting to the present application.

[0018] The experimental methods and detection methods described in the following examples are all conventional methods unless otherwise specified; the reagents and materials described are all commercially available unless otherwise specified.

[0019] Example 1 This example is to prepare coarse granular tomato powder.

[0020] This example uses late-maturing, high pectin and high fiber tomato varieties, 36% CB tomato paste with a viscosity value of 7 cm / 30s, and a vertical screw pump is used to transport the tomato paste to the material tank. The specific preparation process is as follows: Step one, feeding Tomato sauce with 36% CB concentration and viscosity of 7 / 30 s is selected, and a vertical screw pump is used to deliver the tomato sauce into the material tank.

[0021] Step two, material heating The raw material in the material tank enters the preheater and is heated to 70℃.

[0022] Step three, material delivery The heated material is delivered into the material temporary storage tank by the plunger pump.

[0023] Step four, double filtration The material in the temporary storage tank is delivered into the high-pressure spray pump by the rotor pump through the double filter.

[0024] Step five, high-pressure delivery The material is delivered into the atomizer by the high-pressure spray pump, low-pressure atomization is performed using a 1.4 mm aperture spray sheet, and the spray pressure is 20 MPa.

[0025] Step six, spray drying After high-pressure delivery, the material is sprayed by the atomizer, drying is completed under the action of hot air, the material falls to the bottom under the action of the air pressure of the air supply, and enters the first-stage vibration fluidized bed. The induced draft fan separates the tomato powder and moisture, the moisture is discharged into the atmosphere, and the tomato powder enters the tomato powder recovery process and is delivered into the mixing link by the screw conveyor.

[0026] Step seven, two-stage vibration fluidization The material enters the two-stage vibration fluidized bed, the tomato powder is vibrationally scattered and cooled, and the material temperature is controlled at 22℃.

[0027] Step eight, mixing The material enters the mixing screw through the two-stage vibration fluidization, the auxiliary material silicon dioxide (the silicon dioxide addition amount is 1.70% of the mass of the tomato sauce) is delivered into the silicon dioxide discharge pipeline by the screw conveyor, enters the mixing screw, the tomato powder and the silicon dioxide are uniformly mixed, and the coarse granular tomato powder is prepared.

[0028] Step nine, screening (CCP1) The coarse granular tomato powder prepared in step eight is screened by a 20-mesh screen rotary vibration screen to prepare the semi-finished product of coarse granular tomato powder.

[0029] Step ten, filling, weighing and packaging The semi-finished product of coarse granular tomato powder prepared in step nine is packaged and metered into an aluminum foil bag by a packaging machine according to the designed specifications, exhausts and seals, and the coarse granular tomato powder is prepared, which is marked as 1# coarse granular tomato powder.

[0030] Example 2 The coarse granular tomato powder is prepared.

[0031] The present embodiment adopts a late-maturing, high pectin, high fiber tomato variety, 38% CB tomato sauce with a viscosity value of 8 cm / 30 s, and a vertical screw pump is used to transport the tomato sauce to the material tank. The specific preparation process is as follows: Step one, feeding Tomato sauce with a concentration of 38% CB and a viscosity of 8 cm / 30 s is selected, and a vertical screw pump is used to transport the tomato sauce to the material tank.

[0032] Step two, material heating The raw materials in the material tank enter the preheater and are heated to 74℃.

[0033] Step three, material transportation The heated material is transported to the material temporary storage tank by the plunger pump.

[0034] Step four, double filtration The material in the temporary storage tank is sent to the high-pressure spray pump through the double filter by the rotor pump.

[0035] Step five, high-pressure transportation The material is sent into the atomizer by the high-pressure spray pump, low-pressure atomization is performed using a 1.6 mm aperture spray sheet, and the spray pressure is 10 MPa.

[0036] Step six, spray drying After high-pressure transportation, the material is sprayed by the atomizer and dried under the action of hot air. The material falls to the bottom of the tower under the action of the air pressure and enters the first-stage vibration fluidized bed. The induced draft fan separates the tomato powder from the moisture, the moisture is discharged into the atmosphere, and the tomato powder enters the tomato powder recovery process and is transported to the mixing link by the screw conveyor.

[0037] Step seven, two-stage vibration fluidization The material enters the two-stage vibration fluidized bed to vibrate and scatter the tomato powder for cooling, and the material temperature is controlled at 20℃.

[0038] Step eight, mixing The material enters the mixing screw through the two-stage vibration fluidization, the auxiliary material silicon dioxide (the addition amount of silicon dioxide is 1.68% of the mass of the tomato sauce) is sent into the silicon dioxide discharge pipeline by the screw conveyor, enters the mixing screw, the tomato powder and silicon dioxide are mixed uniformly, and a coarse particle tomato powder crude product is prepared.

[0039] Step nine, screening (CCP1) The coarse particle tomato powder crude product prepared in step eight is screened by a 30-mesh screen rotary vibration screen to prepare a coarse particle tomato powder semi-finished product.

[0040] Step ten, filling, weighing, and packaging The crude granular tomato powder semi-finished product prepared in step nine is packaged and metered into aluminum foil bags by a packaging machine according to the designed specifications, and is exhaustively sealed to obtain the crude granular tomato powder, which is marked as 2# crude granular tomato powder.

[0041] Example 3 This example is for preparing crude granular tomato powder.

[0042] In this example, a late-maturing, high pectin, and high fiber tomato variety is used, and 37% CB tomato paste with a viscosity value of 7.2 cm / 30 s is used. The tomato paste is transported to the material tank by a vertical screw pump. The specific preparation process is as follows: Step one, feeding A 37% CB concentration tomato paste with a viscosity of 7.2 / 30 s is used, and a vertical screw pump is used to transport the tomato paste to the material tank.

[0043] Step two, material heating The raw material in the material tank enters the preheater and is heated to 72℃.

[0044] Step three, material transportation The heated material is transported to the material temporary storage tank by the plunger pump.

[0045] Step four, double filtration The material in the temporary storage tank is sent to the high-pressure spray pump by the double filter through the rotor pump.

[0046] Step five, high-pressure transportation The material is sent into the atomizer by the high-pressure spray pump, low-pressure atomization is performed using a 2.0㎜ aperture spray sheet, and the spray pressure is 15MPa.

[0047] Step six, spray drying After high-pressure transportation, the material is sprayed by the atomizer, and drying is completed under the action of hot air. The material falls to the bottom of the tower under the action of the air pressure of the air supply, enters the first-stage vibration fluidized bed. The induced draft fan separates the tomato powder and moisture, the moisture is discharged into the atmosphere, and the tomato powder enters the tomato powder recovery process and is transported to the mixing link by the screw conveyor.

[0048] Step seven, two-stage vibration fluidization The material enters the two-stage vibration fluidized bed, and the tomato powder is vibrated, scattered, and cooled. The material temperature is controlled at 25℃.

[0049] Step eight, mixing The material enters the mixing screw through the two-stage vibration fluidization, the auxiliary material silicon dioxide (the silicon dioxide addition amount is 1.65% of the mass of the tomato paste) is sent into the silicon dioxide discharge pipeline by the screw conveyor, enters the mixing screw, the tomato powder and silicon dioxide are mixed uniformly, and the crude granular tomato powder is prepared.

[0050] Step nine, screening (CCP1) The crude granular tomato powder semi-finished product prepared in step eight is screened through a 40-mesh sieve shaker screen to obtain a crude granular tomato powder semi-finished product.

[0051] Step ten, filling and weighing packaging The crude granular tomato powder semi-finished product prepared in step nine is packaged and metered into an aluminum foil bag through a packaging machine according to the designed specifications, and then the bag is evacuated and sealed, thereby obtaining a crude granular tomato powder, which is marked as 3# crude granular tomato powder.

[0052] Comparative agent 1 The spray hole diameter of the comparative agent is 1.0 mm, and the spray pressure is 10 Mpa. The preparation steps of the comparative agent 1 tomato powder are as follows: Tomato paste with a solid content of 36% is heated to 75°C, pumped into a drying tower through a high-pressure pump, atomized by a spray gun with a spray hole diameter of 1.0 mm: the spray pressure is controlled at 10 Mpa, and then hot air drying is used: the inlet air temperature is controlled at 165°C, and the outlet air temperature is controlled at 70°C. After discharging, the fluidized bed is cooled to 15, and a 40-mesh sieve shaker is used for screening, packaging, and preparation of 1# comparative agent.

[0053] Comparative agent 2 The spray hole diameter of the comparative agent is 1.0 mm, and the spray pressure is 15 Mpa. The preparation steps of the comparative agent 2 tomato powder are as follows: Tomato paste with a solid content of 38% is heated to 80°C, pumped into a drying tower through a high-pressure pump, atomized by a spray gun with a spray hole diameter of 1.0 mm: the spray pressure is controlled at 15 Mpa, and then hot air drying is used: the inlet air temperature is controlled at 170°C, and the outlet air temperature is controlled at 75°C. After discharging, the fluidized bed is cooled to 20°C, and a 40-mesh sieve shaker is used for screening, packaging, and preparation of 2# comparative agent.

[0054] Test example 1#-3# crude granular tomato powder prepared in examples 1-3 and 1#, 2# comparative agents prepared in comparative examples 1-2 are used as test objects, and the appearance, taste, biochemical indicators, microbial indicators, and particle uniformity of different tomato powders are tested by a conventional method. The lycopene content is tested. The amount of fine powder below 120 mesh of different tomato powders is counted. The biochemical indicators are shown in Table 1, and the microbial indicators are shown in Table 2.

[0055] Table 1 Biochemical indicator test results of different tomato powders

[0056] Table 2 Microbial indicator test results of different tomato powders

[0057] From Table 1 and Table 2, it can be seen that the conventional detection items of 1#-3# coarse granular tomato powder and comparative agent tomato powder are: moisture ≤3%, total acid 6.44%-6.57%, lycopene ≥137.8 mg / 100 g, ash ≤12%, lead ≤0.8 mg / kg, arsenic ≤0.5 mg / kg, copper ≤20 mg / kg, total bacterial count ≤1000 CFU / g, coliform group ≤3.0 MPN / g, mold and yeast ≤50 CFU / g, and no pathogenic bacteria. The lycopene of 1#-2# comparative agent is 123.8-120.6 mg / 100 g, and the moisture content is greater than 4%. It is shown that the biochemical indexes and microbial indexes of 1#-3# coarse granular tomato powder and 1# comparative agent and 2# comparative agent all meet the requirements, the lycopene content of 1#-3# coarse granular tomato powder is significantly higher than that of the comparative agent, and the moisture content is less than 3%, which is significantly lower than that of the comparative agent. It is shown that the process of preparing the coarse granular tomato powder in the present application cooperates the process of controlling the temperature in the raw material preheating process at 70-74℃, the secondary fluidized bed mixing, the spraying sheet with a pore size of 1.4-2.0 mm, and the atomization under a spraying pressure of 10-20 MPa, thereby improving the lycopene content of the coarse granular tomato powder and effectively reducing the moisture content of the coarse granular lycopene.

[0058] The appearance detection results of 1#-3# coarse granular tomato powder and comparative agent are shown in Figure 1 Figure 1 A-C in the figure show that the color of 1#-3# coarse granular tomato powder is orange-red, the color is reddish, and there is no skin seed and black spot. Figure 1 D and E in the figure show that the color of the comparative agent tomato powder is orange-red, the color is yellowish, and there is no obvious skin seed and black spot. The appearance of the tomato powder prepared by the preparation process of the coarse granular tomato powder provided in the present application is better than that of the comparative agent of the prior art.

[0059] Table 3 shows the mouthfeel test results of different tomato powders

[0060] From Table 3, it can be seen that compared with the comparative agent, 1#-3# fine granular tomato powder has a sweet and sour taste, and the taste is better than that of the comparative agent which is slightly sour, which may be related to the higher heating temperature of the comparative agent.

[0061] The microscopic examination results of different tomato powders are shown in Figure 2 Figure 2 A, B and C in the figure show that 1#-3# coarse granular tomato powder has more coarse strip-shaped particles, Figure 2 D and E in the figure show that although 1# and 2# comparative agent has more strip-shaped particles, the size difference is obvious. It is shown that compared with the comparative agent, 1#-3# coarse granular tomato powder has relatively uniform properties, which shows that the processing technology is well controlled, and the particle morphology and size distribution are relatively uniform. The high heterogeneity of the properties of the comparative agent tomato powder may lead to different physical properties such as flowability and solubility.​​

[0062] Table 4 Physical properties of tomato powder prepared by different preparation processes

[0063] As shown in Table 4, the 1# coarse granular tomato powder-3# coarse granular tomato powder prepared by the preparation process provided by the present application has a density of 0.55-0.59 g / mL, and the amount of fine powder below 120 mesh is 31-33 g, which is reduced by 5-10 g compared with the comparative agent, and the proportion of particles below 120 mesh is small.

[0064] As described above, the basic principles, main features and advantages of the present application are better described. The above examples and descriptions only describe the preferred embodiments of the present application, and the present application is not limited by the above examples. Without departing from the spirit and scope of the present application, various changes and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the scope of protection of the present application.

Claims

1. A production process for coarse-grained tomato powder, characterized in that, Includes the following steps: S1. Feeding: Tomato sauce is used as the raw material, and a vertical screw pump is used to transport it to the material tank; S2. Material heating: The tomato sauce in the material tank is heated by a preheater; S3. Material conveying and filtration: The heated tomato sauce is conveyed to the material storage tank by a plunger pump, and then conveyed to the high-pressure spray pump by a rotor pump and a dual filter. S4. High-pressure atomization: The tomato sauce is fed into the atomizer by the high-pressure spray pump, and atomization is performed using a spray nozzle with an aperture of 1.4-2.0mm at a spray pressure of 10-20MPa. S5. Spray drying: The atomized tomato sauce is dried under the action of hot air. The dried material enters the first-stage vibrating fluidized bed through the bottom of the tower. The moisture is separated by the induced draft fan to obtain tomato powder. S6. Fluidized bed cooling: The tomato powder is fed into a two-stage vibrating fluidized bed for vibration, dispersion and cooling, and the material temperature is controlled at 20-25℃. S7. Mixing: The cooled tomato powder and silicon dioxide are mixed evenly in a mixing screw. The amount of silicon dioxide added is 1.65%-1.70% of the tomato sauce mass, to obtain coarse tomato powder. S8. Screening: The coarse tomato powder is screened through a 20-40 mesh vibrating screen to obtain a semi-finished coarse tomato powder product. S9. Packaging: The semi-finished product is packaged to obtain the coarse-particle tomato powder.

2. The production process according to claim 1, characterized in that, The tomato sauce in S1 has a solids content of 36%-38% and a viscosity of 7-8 cm / 30 s.

3. The production process according to claim 1, characterized in that, The heating temperature in S2 is 70-74℃.

4. The production process according to claim 1, characterized in that, The amount of silica added in S7 is 1.65%-1.70% of the tomato sauce mass.

5. Coarse-grained tomato powder prepared by the production process according to any one of claims 1-4.

6. The coarse-particle tomato powder according to claim 5, characterized in that, The coarse-particle tomato powder has a lycopene content ≥150mg / 100g and a moisture content ≤3.5%.

7. A food composition, characterized in that, It includes the coarse-particle tomato powder as described in claim 5 or 6.

8. The food composition according to claim 7, characterized in that, The food composition is a soup base, powder, solid beverage, or health food.

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