Preparation method and application of composite filter aid for food

Abstract

The invention discloses a preparation method and application of a composite filter aid for food, and relates to the technical field of filter aids. The preparation method comprises the following steps: S1, crushing the peeled puffed corn, S2, sorting the peeled puffed corn flour, S3, crushing the peeled puffed rice, S4, sorting the puffed rice flour, S5, selecting the porous petal spherical tetrahydrate magnesium carbonate, S6, selecting the food-grade carclazyte and S7, mixing and preparing. According to the preparation method, the composite filter aid for the food is prepared through effective blending and compounding in the process steps S1-S7, after compounding, the composite filter aid is stacked with large and small particle sizes, the pore size among particles is effectively adjusted, and various materials are of porous structures, are different in pore size and are compounded together, so that the blocking and adsorption effects on particles with different sizes in oil residues are achieved; large residues are blocked in pores among particles, and small residues are adsorbed in the pores, so that the defects that a filter screen is easy to leak fine particles, food-grade diatomite and carclazyte filter cakes are easy to crack and the like can be effectively overcome.

Description

Technical Field

[0001] The invention relates to the technical field of filter aids, and in particular to a preparation method and application of a composite filter aid for food. Background Art

[0002] Filter aid is a kind of filter, which is a consumable product for filtering and separating solid-liquid mixtures. Filter aids used in food are mainly used to filter the residues of squeezing rapeseed oil, peanut oil, sunflower oil, tea oil, olive oil, etc., and in the production of fried food, the fine residues of fried food will remain in the frying oil. Too much residue will produce harmful substances after repeated frying;

[0003] The current solution is mainly to filter through a filter, but the filter can only filter out larger particles of residue, while fine particles will still leak through, resulting in incomplete filtration;

[0004] Another method is to use food-grade diatomaceous earth and kaolin as filter aids. However, both diatomaceous earth and kaolin are inorganic materials. The filter cake will become hardened and cracked, and residues will leak through the cracks, affecting the filtering effect.

[0005] Other commercially available filter aids are mostly used in industry, and few are used in food;

[0006] In view of the above problems, the inventors proposed a preparation method and application of a composite filter aid for food to solve the above problems. Summary of the invention

[0007] In order to solve the problem that the filter screen easily leaks fine particles and the food-grade diatomaceous earth and white clay filter cakes easily crack; the purpose of the present invention is to provide a preparation method and application of a composite filter aid for food.

[0008] In order to solve the above technical problems, the present invention adopts the following technical scheme: a method for preparing a composite filter aid for food, wherein peeled puffed corn, puffed rice, porous petal spherical tetrahydrate basic magnesium carbonate and food grade clay are selected and prepared according to the following steps:

[0009] S1. Crushing of peeled and puffed corn

[0010] Select peeled and puffed corn puffed by 2.5 to 4.5 times, add the peeled and puffed corn to a crushing device, crush the peeled and puffed corn, and obtain peeled and puffed corn flour;

[0011] S2. Sorting of peeled and puffed corn flour

[0012] The peeled and puffed corn flour obtained in S1 is added to a sorting device, and the peeled and puffed corn flour is sorted to obtain peeled and puffed corn flour with a volume particle size distribution of more than 94% of 30 to 250 μm and a bulk density of 170 to 260 g / L as the composite flour component A;

[0013] S3. Crushing of peeled and puffed rice

[0014] Selecting puffed rice puffed 2.0 to 4.0 times, adding the puffed rice to a grinding device, grinding the puffed rice to obtain puffed rice flour;

[0015] S4. Sorting of puffed rice flour

[0016] The puffed rice flour obtained in S3 is added to a sorting device, and the puffed rice flour is sorted to obtain puffed rice flour with a volume particle size distribution of more than 94% of 20 to 200 μm and a bulk density of 170 to 260 g / L as the composite powder component B;

[0017] S5. Selection of porous petal-shaped spherical magnesium carbonate tetrahydrate

[0018] Select porous petal-shaped spherical magnesium carbonate tetrahydrate with a volume particle size of more than 95% of 20-30um and a pore size of 1.5um as composite component C;

[0019] S6. Selection of food grade clay

[0020] A food-grade clay having a volume particle size of 15 to 25 μm or more of which is more than 95% is selected as the composite component D, and the pore size of the food-grade clay is about 0.4 μm;

[0021] S7, mixed preparation

[0022] The composite powder component A, the composite powder component B, the composite component C and the composite component D are mixed uniformly according to a certain proportion to prepare a composite powder, thereby obtaining a composite filter aid for food.

[0023] Preferably, in S1, the hole size of the peeled puffed corn puffed 2.5 to 4.5 times is 3.5 um;

[0024] In S3, the pore size of the peeled and puffed rice puffed 2.0 to 4.0 times is 2.5 um.

[0025] Preferably, in S2, a sorting device with upper and lower layers of screens is used, the aperture of the upper screen is 250um, and the aperture of the lower screen is 30um;

[0026] In S4, a sorting device with upper and lower layers of sieves is used, the aperture of the upper sieve is 200um, and the aperture of the lower sieve is 20um.

[0027] Preferably, in S7, the specific steps of mixing the composite powder component A, the composite powder component B, the composite component C and the composite component D are as follows:

[0028] S71, setting the ratio of composite powder component A, composite powder component B, composite component C and composite component D, the mass ratio is:

[0029] Composite powder component A: 30-50, composite powder component B: 25-40, composite component C: 10-20, composite component D: 15;

[0030] S72. Mix evenly in the above proportions to obtain a composite powder with a volume particle size of 94% in the range of 10-300um, a bulk density of 170-250g / L, and a permeability of 4.0-17D for food use. Although food-grade kaolin has an adsorption effect, its adsorption capacity is much smaller than that of the other three ingredients. In this formula, it mainly plays a decolorizing role. Since the four ingredients have adsorption effects, the size of the residue particles in the adsorbed oil will be different depending on the size of the pores between the particles and the size of the pores of the particles themselves. Therefore, the formula is adjusted according to specific requirements.

[0031] The present invention also provides a method for preparing a composite filter aid for food, and the composite filter aid for food is used in edible oils for filtering various pressed oils, residual oils cooled after frying food, etc. The method of using the composite filter aid for food is as follows: a composite filter aid for food is placed on the filter cloth of the filtering device and evenly flattened, and then a mixture of various pressed oils, residual oils cooled after frying food and impurities is slowly injected, and the mixture of various pressed oils, residual oils cooled after frying food and impurities is placed in a composite filter aid for food, and after the cooling oil is completely infiltrated, the filtered solid waste is taken out from the filter cloth and scraped clean, and the filtered oil product becomes a descum-free and decolorized oil product.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. In the present invention, peeled puffed corn, puffed rice, porous petal spherical tetrahydrate basic magnesium carbonate and food-grade clay are selected, and the process steps S1-S7 are followed to effectively prepare and compound the prepared food composite filter aid. After compounding, the large and small particle sizes are accumulated to effectively adjust the pore size between the particles. In addition, various materials are porous structures with different pore sizes. When compounded together, they can block and adsorb particles of different sizes in the oil residue. Large residues are blocked in the pores between the particles, and small residues are adsorbed in the holes, which can effectively overcome the shortcomings of the filter screen easily leaking fine particles and the food-grade diatomaceous earth and clay filter cakes being easy to crack;

[0034] 2. In the present invention, the composite filter aid for food is prepared by selecting peeled puffed corn, puffed rice, porous petal spherical magnesium carbonate tetrahydrate and food-grade white clay and process steps S1-S7. The preparation cost is low and has broad promotion prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 This is a particle size analysis report of the composite filter aid for food according to Example 1 of the present invention.

[0037] Figure 2 This is a particle size analysis report of the composite filter aid for food according to Example 2 of the present invention.

[0038] Figure 3 This is a particle size analysis report of the composite filter aid for food according to Example 3 of the present invention.

[0039] Figure 4 The present invention is a flow chart of a method for preparing a composite filter aid for food. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] like Figure 1-4 As shown:

[0042] Embodiment 1: Figure 1 As shown, the present invention provides a method for preparing a composite filter aid for food, which comprises selecting peeled puffed corn, puffed rice, porous petal spherical tetrahydrate basic magnesium carbonate and food-grade clay, and preparing the composite filter aid according to the following steps:

[0043] S1. Crushing of peeled and puffed corn

[0044] Select peeled and puffed corn puffed by 2.5 to 4.5 times, add the peeled and puffed corn to a crushing device, crush the peeled and puffed corn, and obtain peeled and puffed corn flour;

[0045] S2. Sorting of peeled and puffed corn flour

[0046] The peeled and puffed corn flour obtained in S1 is added to a sorting device, and the peeled and puffed corn flour is sorted by using a sorting device with an upper and lower two-layer screen, wherein the aperture of the upper screen is 250 μm, and the aperture of the lower screen is 30 μm, and the peeled and puffed corn flour with a volume particle size distribution of more than 94% of 30 to 250 μm and a bulk density of 170 to 260 g / L is obtained as the composite powder component A;

[0047] S3. Crushing of peeled and puffed rice

[0048] Selecting puffed rice puffed 2.0 to 4.0 times, adding the puffed rice to a grinding device, grinding the puffed rice to obtain puffed rice flour;

[0049] S4. Sorting of puffed rice flour

[0050] The puffed rice flour obtained in S3 is added to a sorting device, and the puffed rice flour is sorted by using a sorting device with an upper and lower two-layer screen, wherein the aperture of the upper screen is 200um, and the aperture of the lower screen is 20um, and the puffed rice flour with a volume particle size distribution of more than 94% of 20 to 200um and a bulk density of 170 to 260g / L is obtained by sorting, as the composite powder component B;

[0051] S5. Selection of porous petal-shaped spherical magnesium carbonate tetrahydrate

[0052] Select porous petal-shaped spherical magnesium carbonate tetrahydrate with a volume particle size of more than 95% of 20-30um and a pore size of 1.5um as composite component C;

[0053] S6. Selection of food grade clay

[0054] A food-grade clay having a volume particle size of 15 to 25 μm or more of which is more than 95% is selected as the composite component D, and the pore size of the food-grade clay is about 0.4 μm;

[0055] S7, mixed preparation

[0056] The composite powder component A, the composite powder component B, the composite component C and the composite component D are mixed uniformly in proportion to prepare a composite powder, that is, a composite filter aid for food is obtained. The proportion of the composite powder component A, the composite powder component B, the composite component C and the composite component D is as follows:

[0057]

[0058] The composite powders were mixed evenly in proportion to obtain a composite filter aid for food, wherein 94% of the composite powder volume particle size was in the range of 10 to 300 um, the bulk density was 224.14 g / L, and the permeability was 10.57D.

[0059] The bulk density of the composite powder is shown in Table 1, the permeability of the composite powder is shown in Table 2, and the particle size is shown in Appendix Figure 1 ;

[0060]

[0061] Table 1 shows the bulk density of the composite powder in Example 1.

[0062]

[0063] Table 2 shows the composite powder permeability of Example 1

[0064] Embodiment 2: Figure 2 As shown, the present invention provides a method for preparing a composite filter aid for food, which comprises selecting peeled puffed corn, puffed rice, porous petal spherical tetrahydrate basic magnesium carbonate and food-grade clay, and preparing the composite filter aid according to the following steps:

[0065] S1. Crushing of peeled and puffed corn

[0066] Select peeled and puffed corn puffed by 2.5 to 4.5 times, add the peeled and puffed corn to a crushing device, crush the peeled and puffed corn, and obtain peeled and puffed corn flour;

[0067] S2. Sorting of peeled and puffed corn flour

[0068] The peeled and puffed corn flour obtained in S1 is added to a sorting device, and the peeled and puffed corn flour is sorted by using a sorting device with an upper and lower two-layer screen, wherein the aperture of the upper screen is 250 μm, and the aperture of the lower screen is 30 μm, and the peeled and puffed corn flour with a volume particle size distribution of more than 94% of 30 to 250 μm and a bulk density of 170 to 260 g / L is obtained as the composite powder component A;

[0069] S3. Crushing of peeled and puffed rice

[0070] Selecting puffed rice puffed 2.0 to 4.0 times, adding the puffed rice to a grinding device, grinding the puffed rice to obtain puffed rice flour;

[0071] S4. Sorting of puffed rice flour

[0072] The puffed rice flour obtained in S3 is added to a sorting device, and the puffed rice flour is sorted by using a sorting device with an upper and lower two-layer screen, wherein the aperture of the upper screen is 200um, and the aperture of the lower screen is 20um, and the puffed rice flour with a volume particle size distribution of more than 94% of 20 to 200um and a bulk density of 170 to 260g / L is obtained by sorting, as the composite powder component B;

[0073] S5. Selection of porous petal-shaped spherical magnesium carbonate tetrahydrate

[0074] Select porous petal-shaped spherical magnesium carbonate tetrahydrate with a volume particle size of more than 95% of 20-30um and a pore size of 1.5um as composite component C;

[0075] S6. Selection of food grade clay

[0076] A food-grade clay having a volume particle size of 15 to 25 μm or more of which is more than 95% is selected as the composite component D, and the pore size of the food-grade clay is about 0.4 μm;

[0077] S7, mixed preparation

[0078] The composite powder component A, the composite powder component B, the composite component C and the composite component D are mixed uniformly in proportion to prepare a composite powder, that is, a composite filter aid for food is obtained. The proportion of the composite powder component A, the composite powder component B, the composite component C and the composite component D is as follows:

[0079]

[0080] The mixture is mixed evenly in proportion to obtain a composite filter aid for food, in which 94% of the composite powder volume particle size is in the range of 10 to 300 um, the bulk density is 229.43 g / L, and the permeability is 10.81D.

[0081] The bulk density of the composite powder is shown in Table 3, the permeability of the composite powder is shown in Table 4, and the particle size is shown in Appendix Figure 2 ;

[0082]

[0083] Table 3 shows the bulk density of the composite powder of Example 2

[0084]

[0085] Table 4 shows the permeability of the composite powder of Example 2

[0086] Embodiment 3: Figure 3 As shown, the present invention provides a method for preparing a composite filter aid for food, which comprises selecting peeled puffed corn, puffed rice, porous petal spherical tetrahydrate basic magnesium carbonate and food-grade clay, and preparing the composite filter aid according to the following steps:

[0087] S1. Crushing of peeled and puffed corn

[0088] Select peeled and puffed corn puffed by 2.5 to 4.5 times, add the peeled and puffed corn to a crushing device, crush the peeled and puffed corn, and obtain peeled and puffed corn flour;

[0089] S2. Sorting of peeled and puffed corn flour

[0090] The peeled and puffed corn flour obtained in S1 is added to a sorting device, and the peeled and puffed corn flour is sorted by using a sorting device with an upper and lower two-layer screen, wherein the aperture of the upper screen is 250 μm, and the aperture of the lower screen is 30 μm, and the peeled and puffed corn flour with a volume particle size distribution of more than 94% of 30 to 250 μm and a bulk density of 170 to 260 g / L is obtained as the composite powder component A;

[0091] S3. Crushing of peeled and puffed rice

[0092] Selecting puffed rice puffed 2.0 to 4.0 times, adding the puffed rice to a grinding device, grinding the puffed rice to obtain puffed rice flour;

[0093] S4. Sorting of puffed rice flour

[0094] The puffed rice flour obtained in S3 is added to a sorting device, and the puffed rice flour is sorted by using a sorting device with an upper and lower two-layer screen, wherein the aperture of the upper screen is 200um, and the aperture of the lower screen is 20um, and the puffed rice flour with a volume particle size distribution of more than 94% of 20 to 200um and a bulk density of 170 to 260g / L is obtained by sorting, as the composite powder component B;

[0095] S5. Selection of porous petal-shaped spherical magnesium carbonate tetrahydrate

[0096] Select porous petal-shaped spherical magnesium carbonate tetrahydrate with a volume particle size of more than 95% of 20-30um and a pore size of 1.5um as composite component C;

[0097] S6. Selection of food grade clay

[0098] A food-grade clay having a volume particle size of 15 to 25 μm or more of which is more than 95% is selected as the composite component D, and the pore size of the food-grade clay is about 0.4 μm;

[0099] S7, mixed preparation

[0100] The composite powder component A, the composite powder component B, the composite component C and the composite component D are mixed uniformly in proportion to prepare a composite powder, that is, a composite filter aid for food is obtained. The proportion of the composite powder component A, the composite powder component B, the composite component C and the composite component D is as follows:

[0101]

[0102] The mixture is mixed evenly in proportion to obtain a composite filter aid for food, in which 94% of the composite powder volume particle size is in the range of 10 to 300 um, the bulk density is 228.74 g / L, and the permeability is 10.26D.

[0103] The bulk density of the composite powder is shown in Table 5, the permeability of the composite powder is shown in Table 6, and the particle size is shown in Appendix Figure 3 ;

[0104]

[0105] Table 5 shows the bulk density of the composite powder.

[0106]

[0107] Table 6 shows the composite powder permeability

[0108] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for preparing a composite filter aid for food, characterized in that: Peeled puffed corn, puffed rice, porous petal spherical basic magnesium carbonate tetrahydrate and food grade clay are selected and prepared according to the following steps: S1. Crushing of peeled and puffed corn Select peeled and puffed corn puffed by 2.5 to 4.5 times, add the peeled and puffed corn to a crushing device, crush the peeled and puffed corn, and obtain peeled and puffed corn flour; S2. Sorting of peeled and puffed corn flour The peeled and puffed corn flour obtained in S1 is added to a sorting device, and the peeled and puffed corn flour is sorted to obtain peeled and puffed corn flour with a volume particle size distribution of more than 94% of 30 to 250 μm and a bulk density of 170 to 260 g / L as the composite flour component A; S3. Crushing of peeled and puffed rice Selecting puffed rice puffed 2.0 to 4.0 times, adding the puffed rice to a grinding device, grinding the puffed rice to obtain puffed rice flour; S4. Sorting of puffed rice flour The puffed rice flour obtained in S3 is added to a sorting device, and the puffed rice flour is sorted to obtain puffed rice flour with a volume particle size distribution of more than 94% of 20 to 200 μm and a bulk density of 170 to 260 g / L as the composite powder component B; S5. Selection of porous petal-shaped spherical magnesium carbonate tetrahydrate Select porous petal-shaped spherical magnesium carbonate tetrahydrate with a volume particle size of more than 95% of 20-30um and a pore size of 1.5um as composite component C; S6. Selection of food grade clay A food-grade clay having a volume particle size of 15 to 25 μm or more of which is more than 95% is selected as the composite component D, and the pore size of the food-grade clay is about 0.4 μm; S7, mixed preparation The composite powder component A, the composite powder component B, the composite component C and the composite component D are mixed uniformly according to a certain proportion to prepare a composite powder, thereby obtaining a composite filter aid for food.

2. The method for preparing a composite filter aid for food according to claim 1, characterized in that: In S1, the hole size of the peeled puffed corn puffed 2.5 to 4.5 times is 3.5 um; In S3, the pore size of the peeled and puffed rice puffed 2.0 to 4.0 times is 2.5 um.

3. The method for preparing a composite filter aid for food according to claim 1, characterized in that: In S2, a sorting device with two layers of sieves is used, the aperture of the upper sieve is 250um, and the aperture of the lower sieve is 30um; In S4, a sorting device with upper and lower layers of sieves is used, the aperture of the upper sieve is 200um, and the aperture of the lower sieve is 20um.

4. The method for preparing a composite filter aid for food according to claim 1, characterized in that: In S7, the specific steps of mixing the composite powder component A, the composite powder component B, the composite component C and the composite component D are as follows: S71, setting the ratio of composite powder component A, composite powder component B, composite component C and composite component D, the mass ratio is: Composite powder component A: 30-50, composite powder component B: 25-40, composite component C: 10-20, composite component D: 15; S72. Mix evenly according to the above proportions to obtain a composite filter aid for food with a particle size of 10 to 300 um, a bulk density of 170 to 250 g / L, and a permeability of 4.0 to 17D, which accounts for 94% of the volume of the composite powder.

5. Use of the composite filter aid for food prepared by the method for preparing the composite filter aid for food according to any one of claims 1 to 4 in edible oil.

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