Production equipment and production process and products of edible hydrogenated oil-embedded organic acid preservatives for baking

Abstract

The present invention relates to a production equipment, production process and product of edible hydrogenated oil-embedded organic acid preservatives for baking. First, edible hydrogenated oil, distilled mono- or diglycerides, and organic acid preservatives are crushed and screened, and then the raw material particles are alternately input into parallel raw material mixers for mixing, and the resulting materials enter a simplified internal heat rotary drum dryer for melting and coating, and the mixture in a liquid-solid critical state enters a vibrating fluidized bed dryer for dispersion, cooling, and solidification to form granular materials; after these granular materials are screened by a drum screen, the granular materials with qualified particle size and fineness are transported to a finished product mixer for homogenization and packaging, and the unqualified large granular materials are crushed by a swing granulator and returned to the simplified internal heat rotary drum dryer for re-coating and embedding. The present invention not only provides a set of systematic industrial production equipment, but also formulates a special production process, which can continuously, stably, scaled, and low-cost provide customers with fat-embedded preservative products for baking.

Description

Technical Field

[0001] The present invention relates to the technical field of food additives and production and processing equipment thereof, and in particular to production equipment for edible hydrogenated oil-embedded organic acid preservatives for baking and a production process and product thereof. Background Art

[0002] Baked food generally refers to convenient food made from eggs, flour, sugar, oil, salt and water, fermented with yeast and lactic acid bacteria, and added with emulsifiers and preservatives, through a series of complex process methods. Baked food can be divided into three categories: bread, cake and biscuits, among which bread accounts for about two-thirds of the market share of baked food. With the development of social economy, the baked food market has shown a sustained growth trend, and the types of products available are becoming increasingly rich. Since baked food involves a long product chain, the demand for additives that determine the quality of baked products will also increase significantly.

[0003] The huge consumption requires corresponding food safety management. As product quality is affected by many complex factors, the laws and regulations related to baked goods in my country are constantly being improved. Scientific research and production and operation units must pay attention to and strictly control the use of additives in the product design and production process. Taking preservatives as an example, calcium propionate preservatives can usually be seen in the ingredient list of baked food production. This is because propionates have basically no inhibitory effect on yeast (that is, they do not affect the early proofing of the baked food production process), and have good resistance or inhibitory effect on most common spoilage bacteria that easily cause baked food to deteriorate, and the effect is more significant when the pH is ≦5. However, most baked products will add leavening agents in the later stage of fermentation. While improving the state of the product, it can also neutralize the sour taste to a near-neutral environment of pH≈6, so that the antibacterial effect of propionates will be significantly reduced. In order to maintain the flavor of the product and further extend the shelf life, it is often necessary to add a single or compound preservative (such as sodium dehydroacetate, sorbic acid, potassium sorbate, fumaric acid or a mixture of such organic acids, etc.) again after the fermentation is completed and before baking begins, so as to ensure that the product reaches the target shelf life. This not only increases the operating procedures, but also poses the risk of secondary contamination and affecting product shape.

[0004] Since low concentrations of organic preservatives such as sodium dehydroacetate, sorbic acid, potassium sorbate, fumaric acid, etc., or mixtures of a certain proportion, have a significant inhibitory effect on yeast, these preservatives should not be added directly in the batching stage before fermentation. The ideal solution is to first encapsulate the above preservatives with substances that are not easily soluble in water, and then add them together with propionates and the like during the production of ingredients. This solution not only has a better antiseptic effect than secondary addition, but also ensures that the product shaping achieves the best effect. There are already many documents related to preservative encapsulation technology, such as Chinese patents CN101228962A, CN101897461A, CN106387849A, etc.

[0005] Overall, the theoretical exploration significance of these patent solutions is quite obvious. For example, CN101228962A defines the target product as a "microencapsulated" product, while true "microencapsulation" has principles and standards. Usually, the shape of the microencapsulated product depends on the raw materials and preparation method, and the particle size is generally controlled within the range of 5-200μm. To meet these basic principles, special spray granulation equipment must be used. However, compared with other types of granulation equipment, these equipment generally have common problems such as huge equipment investment and greater difficulty in production operation control under the same production scale. For oil-embedded organic acid preservatives that only need to achieve full encapsulation of organic acid preservatives by oil, and the particle size of 150-850μm can meet the use requirements, and the product has relatively low added value, microencapsulation objectively has problems such as low cost performance of equipment investment and difficulty in control.

[0006] In addition, CN101228962A and CN101897461A introduced the production process of oil-encapsulated organic acid preservatives, and CN106387849 A introduced the production method of oil-encapsulated leavening agents. These schemes basically adopt the conventional process of heating, stirring and melting the raw materials in a special mixing tank, and then making preliminary preparations for embedding. However, the edible hydrogenated oil (melting point 58-75°C) used as the packaging material and the organic acid preservatives used as the core material, such as dehydroacetic acid (melting point 108-111°C), sodium dehydroacetate (melting point 295°C), sorbic acid (melting point 132-135°C), potassium sorbate (melting point 270°C), fumaric acid (melting point 298-300°C), etc., are almost completely immiscible and have a large difference in melting points, making it difficult to achieve a good embedding effect. It is worth noting that the above patented technology uses low-temperature air cooling during granulation and molding, which not only requires special refrigeration equipment but also requires increased energy consumption represented by electricity. Before the finished product is packaged, it takes a lot of time to restore the product to normal temperature (increasing the process section) to avoid moisture resorption and biological infection. These operations pose extremely stringent tests to environmental humidity and biological cleanliness. Summary of the invention

[0007] One of the purposes of the present invention is to provide a set of production equipment combination for embedding organic acid preservatives in edible hydrogenated oil for baking, which includes a raw material mixer, a simplified internal heat rotary drum dryer, a vibrating fluidized bed dryer, a drum screen, an air flow conveyor, a swing granulator, a finished product mixer and a packaging machine. The discharge port of the raw material mixer is connected to the feed port of the simplified internal heat rotary drum dryer, the discharge port of the simplified internal heat rotary drum dryer is connected to the feed port of the vibrating fluidized bed dryer, the discharge port of the vibrating fluidized bed dryer is connected to the feed port of the drum screen; the discharge port of the drum screen is connected to the feed port of the finished product mixer through the air flow conveyor, the coarse material discharge port of the drum screen crushes the material through the swing granulator and then returns it to the feed port of the simplified internal heat rotary drum dryer, and is melt-embedded together with the newly fed material; the discharge port of the finished product mixer is connected to the feed port of the packaging machine.

[0008] Furthermore, the raw material mixer includes two parallel one-dimensional mixers and a three-way discharge hopper. The three material inlets and outlets of the three-way discharge hopper are respectively connected to the discharge ports of the two one-dimensional mixers and the feed port of the simplified internal heat rotary drum dryer. The two parallel one-dimensional mixers are small-capacity mixers (relative to the finished product mixer), which are mainly used for alternating feeding and raw material mixing to ensure large-scale continuous production.

[0009] Furthermore, the simplified internal heat rotary drum dryer has a sandwich structure, including an inner wall of the cylinder, a middle hot water heating jacket and an outer insulation layer; the hot water heating jacket is respectively connected to the hot water inlet and the hot water outlet at both ends of the cylinder, and is used to input circulating water of a set temperature to heat or cool the cylinder; the inner wall of the cylinder is respectively connected to the feed port and the discharge port at both ends of the cylinder.

[0010] Furthermore, a cross-shaped hot water conduit is provided at both ends of the cylinder, and the hot water inlet and the hot water outlet are both connected to the hot water heating jacket through the cross intersection of the hot water conduit. The cross-shaped hot water conduit can efficiently and quickly transport circulating water to the hot water heating jacket, ensuring that the cylinder is heated evenly and at a consistent temperature.

[0011] Furthermore, the simplified internal heat rotary drum dryer also includes a drum gear, a rotating screw blade, and an exhaust port; the drum gear is arranged on the outer surface of the simplified internal heat rotary drum dryer, and is connected to the gear transmission mechanism (gear + motor) and driven to rotate thereby; the rotating screw blade is coaxially arranged on the inner wall of the drum and can rotate with the drum, thereby conveying or rotating the material forward; the exhaust port is connected to the inner wall of the drum for exhaust during production.

[0012] Furthermore, the rotating spiral blades are composed of intermittent rotating spiral blades close to the barrel feed port and continuous rotating spiral blades close to the barrel discharge port, wherein the length of the intermittent rotating spiral blades is equivalent to 2 / 3-4 / 5 of the length of the barrel.

[0013] Furthermore, the simplified internal heat rotary drum dryer further comprises supporting wheels distributed on both sides of the drum body. The function of the supporting wheels is to provide sufficient support for the drum body so that it is more stable when rotating.

[0014] The second object of the present invention is to provide a method for producing edible hydrogenated oil for baking with organic acid preservatives embedded therein, which method comprises the following steps: (a) firstly crushing and screening the raw materials to obtain raw material particles of a specific particle size; (b) conveying the raw material particles obtained in step (a) into a raw material mixer for mixing; (c) conveying the mixed raw materials into a simplified internal heat rotary drum dryer for melt coating to obtain a liquid-solid critical state mixture; (d) inputting the liquid-solid critical state mixture of step (c) into a vibrating fluidized bed dryer to obtain a granular material after solidification; (e) conveying the granular material to a drum screen for screening, and the qualified granular products are conveyed by an air flow conveyor to a finished product mixer for homogenization, and then enter a packaging machine for packaging, and the unqualified large granular materials enter a swing granulator for crushing, and then are conveyed back to the simplified internal heat rotary drum dryer for melt coating.

[0015] Furthermore, the raw materials in step (a) include edible hydrogenated oil, distilled mono- or diglycerides, and organic acid preservatives, wherein the edible hydrogenated oil is specifically hydrogenated palm oil with a melting point of 58°C or hydrogenated sunflower oil with a melting point of 65-75°C, and the organic acid preservatives are specifically dehydroacetic acid, sodium dehydroacetate, sorbic acid, potassium sorbate, fumaric acid, or a mixture of sorbic acid and fumaric acid (mixing mass ratio of 1:2-3). When feeding, the amount of organic acid preservatives used is equivalent to 70%-90% of the total raw material mass, and the amount of distilled mono- or diglycerides fed is equivalent to 1%-5% of the total amount of edible hydrogenated oil and distilled mono- or diglycerides fed.

[0016] Furthermore, in step (a), the raw materials are crushed by a swing granulator and then qualified particles are screened for standby use, wherein the particle or powder fineness of the distilled mono- or diglyceride is ≥ 40 mesh, and the particle or powder fineness of the organic acid preservative is 40-100 mesh, and the materials with a particle fineness of > 100 mesh are collected and returned to the raw material warehouse.

[0017] Furthermore, the feeding method in step (b) is as follows: in a stopped state, edible hydrogenated oil is added to a raw material mixer, and then distilled mono- or diglycerides are added and the machine is started for mixing, and then an organic acid preservative is added after the machine is stopped, and the machine is started again for mixing until a predetermined time; or in a stopped state, edible hydrogenated oil and distilled mono- or diglycerides are added to a raw material mixer at the same time, the machine is started for mixing, and then an organic acid preservative is added after the machine is stopped, and the machine is started again for mixing until a predetermined time.

[0018] Furthermore, in step (c), the circulating hot water inlet temperature of the simplified internal heat rotary drum dryer is 20±5°C higher than the selected melting point of the edible hydrogenated oil, and the circulating hot water outlet temperature is 15±5°C higher than the selected melting point of the edible hydrogenated oil; the feed temperature of the simplified internal heat rotary drum dryer is room temperature, and the outlet temperature is 10±2°C higher than the selected melting point of the edible hydrogenated oil. By strictly controlling the feed inlet and outlet temperatures of the simplified internal heat rotary drum dryer, the edible hydrogenated oil and distilled mono- or diglycerides entering the drum are completely melted, while the organic acid preservatives are still in a solid state, which is conducive to the completely melted edible hydrogenated oil and distilled mono- or diglycerides being infiltrated and coated onto the surface of the target organic acid preservatives, forming a liquid-solid critical state mixture that enters the vibrating fluidized bed dryer for cooling and solidification.

[0019] Furthermore, in step (d), the air flow temperature of the vibrating fluidized bed dryer is room temperature, and the material output temperature is 20-40° C. lower than the melting point of the selected edible hydrogenated oil.

[0020] The third object of the present invention is to provide an edible hydrogenated oil for baking produced by the above-mentioned equipment and method and encapsulating an organic acid preservative.

[0021] Compared with the prior art, the beneficial effects of the present invention are embodied in the following aspects: (1) a complete set of industrial production equipment combination for edible hydrogenated oil encapsulated organic acid preservatives for baking has been successfully developed, and a specific and highly operable production process has been formulated, which can provide customers with edible hydrogenated oil encapsulated preservative products in large quantities, stably and at low cost; (2) the spray encapsulation granulation method suitable for the production and application of high value-added products has been abandoned, and a simplified internal heat rotary drum dryer has been developed instead, which uses the heated oil to directly melt-encapsulate the organic acid preservative particles. Compared with the spray encapsulation method, the method of the present invention has a smaller investment in the whole set of equipment under the same production scale, and is easier to operate and mass produce; (3) the present invention adopts room temperature air cooling encapsulation, which is significantly energy-saving and consumption-reducing compared to the commonly used forced refrigeration air low-temperature cooling encapsulation molding method, and the product encapsulation effect is excellent. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a process flow chart of the present invention;

[0023] Figure 2 It is a connection diagram of the equipment of the present invention;

[0024] Figure 3 This is an axial cross-sectional view of a simplified internal heat rotary drum dryer;

[0025] Figure 4 This is a simplified cross-sectional view of the end of an internal heat rotary drum dryer.

[0026] Among them, 1-hot water inlet, 2-feeding port, 3-frame, 4-insulation layer, 5-hot water heating jacket, 6-barrel gear, 7-intermittent rotating screw blade, 8-continuous rotating screw blade, 9-exhaust port, 10-hot water outlet, 11-hot water inlet pipe, 12-barrel inner wall, 13-hot water outlet pipe, 14-discharge port, 15-supporting wheel, 16-gear rotating mechanism, 17-hot water pipe, 18-rotating screw blade. DETAILED DESCRIPTION

[0027] In order to enable ordinary technicians in the field to fully understand the technical solutions and beneficial effects of the present invention, further description is given below in conjunction with specific embodiments and drawings.

[0028] The industrial production process of the edible hydrogenated oil for baking and the structures of the related equipment combination are as follows: Figure 1 , 2 -4. The production equipment involved mainly includes raw material mixers (two, arranged in parallel), simplified internal heat rotary drum dryer (one), vibrating fluidized bed dryer (one), drum screen (one), air flow conveyors (several), swing granulators (several), finished product mixer (one) and packaging machine (one).

[0029] Among them, the simplified internal heat rotary drum dryer is the core key equipment, and its appearance is a large horizontal cylinder. The cylinder is a sandwich structure, and hot water 20±5℃ higher than the melting point of the selected brand of edible hydrogenated oil can be passed into the sandwich to heat the inner wall of the cylinder and the material. The inner wall of the cylinder is made of stainless steel that meets the requirements of food production, the outer wall of the sandwich is made of stainless steel or carbon steel that can be welded to the inner wall, and the outer layer of the cylinder is a thermal insulation material. On the inner wall of the cylinder, there are welded spiral blades matching the working capacity, among which the spiral blades on the front 2 / 3 to 4 / 5 of the length of the cylinder are arranged intermittently, and the spiral blades on the back 1 / 3 to 1 / 5 of the length of the cylinder are arranged continuously. Gear rotation mechanisms and supporting wheels are respectively arranged at the bottom and both sides of the simplified internal heat rotary drum dryer, which are used to drive the cylinder to rotate (drive the spiral blades to rotate) and support the cylinder. The material enters the inner wall of the cylinder from the feed inlet, is transported to the discharge outlet under the action of the spiral blades, and is discharged from the discharge outlet to enter the next equipment and process. The circulating hot water enters the hot water heating jacket from the hot water inlet and the cross-shaped hot water conduit at one side of the cylinder end, and is discharged from the cross-shaped hot water conduit and the hot water outlet at the other end.

[0030] The process flow of using the above equipment to produce edible hydrogenated oil for baking to embed organic acid preservatives is as follows:

[0031] A. Feed

[0032] The total amount of one-time feed is no more than one third of the effective volume of a single one-dimensional raw material mixer (a or b), and the one-time feed amount of edible hydrogenated oil, distilled mono- or diglyceride, and organic acid preservative is calculated and accurately prepared according to the product composition.

[0033] Input accurately weighed edible hydrogenated oil into the one-dimensional raw material mixer (a), then input accurately weighed distilled mono- or diglycerides (or input simultaneously), then start the one-dimensional raw material mixer (a) to mix in reverse until the verified mixing time, then rotate forward until the mixture of edible hydrogenated oil and distilled mono- or diglycerides just reaches the critical output state, immediately stop the one-dimensional raw material mixer (a) and adjust it to a state where it can continue to feed. Then input accurately weighed organic acid preservatives into the one-dimensional raw material mixer (a) at one time, and start the one-dimensional mixer (a) again to mix in reverse until the verified mixing time.

[0034] During this period, start the simplified internal heat rotary drum dryer in advance to preheat its drum to the feeding temperature. Adjust the one-dimensional raw material mixer (a) to forward rotation and control the appropriate speed, and continuously input the mixed material into the preheated simplified internal heat rotary drum dryer with an output matching the system device. Use the one-dimensional raw material mixer (b) and the one-dimensional raw material mixer (a) to alternately feed materials to achieve continuous production.

[0035] Edible hydrogenated oil in the raw material can be selected from hydrogenated palm oil with a melting point of about 58°C or hydrogenated sunflower oil with a melting point of 65-75°C. Organic acid preservatives can be selected from dehydroacetic acid, sodium dehydroacetate, sorbic acid, potassium sorbate, fumaric acid or a mixture of sorbic acid and fumaric acid (sorbic acid / fumaric acid = 1:2-1:3). Before use, the raw materials are crushed by a swing granulator and then sieved. Edible hydrogenated oil and distilled mono- or diglycerides are required to be crushed to ≥40 mesh, and organic acid preservatives are crushed to 40-100 mesh. Materials with meshes >100 are collected and returned to the raw material warehouse for standby or reserved for other uses.

[0036] B. Melt coating embedding

[0037] When the system is started, keep the drum of the simplified internal heat rotary drum dryer rotating, and start the circulating hot water for drum heating at the same time. The inlet temperature of the circulating hot water is 20±5℃ higher than the melting point of the selected brand of edible hydrogenated oil, and the outlet temperature is 15±5℃ higher than the melting point of the selected brand of edible hydrogenated oil. Start feeding after reaching the standard. Coordinate the output of the one-dimensional raw material mixer (a) or the one-dimensional raw material mixer (b) to match the drum output of the simplified internal heat rotary drum dryer, and control the temperature of the material continuously output by the simplified internal heat rotary drum dryer to be 10±2℃ higher than the melting point of the selected brand of edible hydrogenated oil, so that the completely melted edible hydrogenated oil and distilled mono- or diglycerides are completely infiltrated and coated on the surface of the organic acid preservative, forming a liquid-solid critical state plastic mixed material that enters the vibrating fluidized bed dryer that is started and operates smoothly.

[0038] C. Vibration dispersion curing

[0039] Control and adjust the air volume of room temperature air that enters from the bottom of the fluidized bed of the vibrating fluidized bed dryer and is extracted from the top after passing through the fluidized bed and being filtered by low, medium and high efficiency levels, so that the liquid-solid critical plastic mixture that is continuously input into the vibrating fluidized bed dryer gradually forms and maintains a fluidized state that floats up and down and moves toward the outlet. Coordinate the vibration intensity and inlet and outlet air volume of the vibrating fluidized bed dryer to maintain the uniform and continuous output of the material from the vibrating fluidized bed dryer as fine, uniform and loose particles with a temperature 20-40°C lower than the melting point of the corresponding brand of edible hydrogenated oil.

[0040] D. Drum screen screening

[0041] The fine and loose particles output by the vibrating fluidized bed dryer enter the drum screen for screening. A large number of particles and granular powders that pass through the selected screen are continuously input into the one-dimensional finished product mixer, and a small amount of larger particles that do not pass through the selected screen are continuously input into the swing granulator. After the large particles are crushed, they are synchronously returned to the feed port of the simplified internal heat rotary drum dryer, continue to mix with the new raw materials in the drum of the simplified internal heat rotary drum dryer, and are input into the vibrating fluidized bed dryer after being infiltrated and embedded again.

[0042] E. Mix well

[0043] After the one-dimensional finished product mixer finishes feeding, the feed port is closed, and then the machine is turned on to start the mixing program, and the input materials are mixed evenly according to the verification program for achieving uniform mixing.

[0044] F. Product Packaging

[0045] Use food-grade polyethylene plastic film bags of appropriate specifications as inner bags, and cartons, paper barrels or paper-plastic composite bags that meet customer needs as outer packaging, and package the edible hydrogenated oil-embedded organic acid preservative products homogenized in the one-dimensional finished product mixer in batches.

[0046] Referring to the above process flow and equipment, the following raw material ratios were used to statistically analyze the production cases of 5 batches of edible hydrogenated oil-encapsulated organic acid preservative products.

[0047] Table 1 Parameters of each batch of raw materials

[0048]

[0049] Five batches of products were randomly sampled and tested, and the results are shown in Table 2 below.

[0050] Table 2 Test results of each batch of products

[0051]

[0052] It can be seen from the five more representative embodiments listed above that the equipment combination, production process and related products provided by the present invention have the following significant advantages: first, the unit equipment is simple to manufacture and the series equipment configuration is concise and reasonable, which is conducive to large-scale production and has outstanding investment benefit advantages; second, it is easy to produce and operate, with reliable product quality and high production efficiency; third, the one-time finished product yield (90%-94.8%) and the total yield (99%-99.6%) are both high, and the economy is good.

Claims

1. A production equipment combination for embedding organic acid preservatives in edible hydrogenated oil for baking, characterized in that: The equipment combination includes a raw material mixer, a simplified internal heat rotary drum dryer, a vibrating fluidized bed dryer, a drum screen, an air flow conveyor, a swing granulator, a finished product mixer and a packaging machine; The discharge port of the raw material mixer is connected to the feed port of the simplified internal heat rotary drum dryer, the discharge port of the simplified internal heat rotary drum dryer is connected to the feed port of the vibrating fluidized bed dryer, the discharge port of the vibrating fluidized bed dryer is connected to the feed port of the drum screen; the discharge port of the drum screen is connected to the feed port of the finished product mixer through an air flow conveyor, the material output from the coarse material discharge port of the drum screen is crushed by the swing granulator and then returned to the simplified internal heat rotary drum dryer; the discharge port of the finished product mixer is connected to the feed port of the packaging machine; The simplified internal heat rotary drum dryer comprises an inner cylinder inner wall, a middle hot water heating jacket, an outer insulation layer, a cylinder gear, a rotary screw blade, an exhaust port and supporting wheels distributed on both sides of the cylinder, wherein the hot water heating jacket is respectively connected to the hot water inlet and the hot water outlet at both ends of the cylinder, and the inner cylinder wall is respectively connected to the feed port and the discharge port at both ends of the cylinder; a cross-shaped hot water conduit is arranged at both ends of the cylinder, and the hot water inlet and the hot water outlet are both connected to the hot water heating jacket through the cross intersection of the hot water conduit; the cylinder gear is arranged on the outer surface of the simplified internal heat rotary drum dryer, and is connected to the gear transmission mechanism and driven to rotate by it; the exhaust port is connected to the inner cylinder wall for exhaust; the rotary screw blade is coaxially arranged on the inner cylinder wall and can rotate with the cylinder, and the rotary screw blade consists of an intermittent rotary screw blade close to the cylinder feed port and a continuous rotary screw blade close to the cylinder discharge port, wherein the length of the intermittent rotary screw blade is equivalent to 2 / 3-4 / 5 of the length of the cylinder; The method for industrially preparing edible hydrogenated oil for baking and embedding organic acid preservatives by using the production equipment combination comprises the following steps: (a) First, the raw material is crushed and screened to obtain raw material particles with a specific particle size; (b) conveying the raw material particles obtained in step (a) into a raw material mixer for mixing; (c) The mixed raw materials are transported into a simplified internal heat rotary drum dryer for melt coating to obtain a liquid-solid critical state mixture; (d) feeding the liquid-solid intercritical state mixture of step (c) into a vibrating fluidized bed dryer to obtain a granular material after solidification; (e) The granular materials are conveyed to the drum screen for screening. The qualified granular products are conveyed to the finished product mixer by the air conveyor for homogenization and then to the packaging machine for packaging. The unqualified large granular materials are crushed in the swing granulator and then conveyed back to the simplified internal heat rotary drum dryer for melt coating; The raw materials in step (a) include edible hydrogenated oil, distilled mono- or diglycerides, and organic acid preservatives. The amount of organic acid preservatives used during feeding is equivalent to 70%-90% of the mass of all raw materials, and the amount of distilled mono- or diglycerides fed is equivalent to 1%-5% of the total amount of edible hydrogenated oil and distilled mono- or diglycerides fed. In step (c), the circulating hot water inlet temperature of the simplified internal heat rotary drum dryer is 20±5°C higher than the selected melting point of the edible hydrogenated oil, and the circulating hot water outlet temperature is 15±5°C higher than the selected melting point of the edible hydrogenated oil. The feed temperature of the simplified internal heat rotary drum dryer is room temperature, and the outlet temperature is 10±2°C higher than the selected melting point of the edible hydrogenated oil. In step (d), the air flow temperature of the vibrating fluidized bed dryer is room temperature, and the material output temperature is 20-40°C lower than the selected melting point of the edible hydrogenated oil. In step (e), the mesh number of the drum screen is 25-100.

2. The production equipment combination according to claim 1, characterized in that: The raw material mixer comprises two parallel one-dimensional mixers and a three-way discharge hopper, wherein three material inlets and outlets of the three-way discharge hopper are respectively connected with the discharge ports of the two one-dimensional mixers and the feed port of the simplified internal heat rotary drum dryer.

3. The production equipment combination according to claim 1, characterized in that: In step (a), the edible hydrogenated oil is specifically hydrogenated palm oil with a melting point of 58° C. or hydrogenated sunflower oil with a melting point of 65-75° C., and the organic acid preservative is specifically dehydroacetic acid, sodium dehydroacetate, sorbic acid, potassium sorbate, fumaric acid or a mixture of sorbic acid and fumaric acid.

4. The production equipment combination according to claim 1, characterized in that: In step (a), the raw materials are crushed by a swing granulator and then sieved to obtain qualified particles for use, wherein the particles or powders of distilled mono- or diglycerides have a fineness of ≥40 mesh, and the particles or powders of organic acid preservatives have a fineness of 40-100 mesh. The materials with a fineness of >100 mesh are collected and reused.

5. The production equipment combination according to claim 1, characterized in that The feeding method in step (b) is as follows: adding edible hydrogenated oil to the raw material mixer in a stopped state, then adding distilled mono- or diglyceride and starting the machine for mixing, adding organic acid preservatives after stopping, and starting the machine again for mixing for a predetermined time; or adding edible hydrogenated oil and distilled mono- or diglyceride to the raw material mixer at the same time in a stopped state, starting the machine for mixing, adding organic acid preservatives after stopping, and starting the machine again for mixing for a predetermined time.

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