High-temperature powdery food crushing and sterilizing integrated device taking high-temperature and high-pressure carbon dioxide as crushing medium

Abstract

The invention discloses a high-temperature powdery food crushing and sterilizing integrated device with high-temperature and high-pressure carbon dioxide as a crushing medium. The device comprises an air compressor, an air source post-processing system, a heater, a high-temperature crushing cavity, a high-temperature filter cartridge dust remover, an induced draft fan, a safety filter, a UV lamp tube and the like. High-temperature and high-pressure carbon dioxide is used as a crushing medium, powdery food is wrapped by violent turbulent flow at the intersection of airflow and is crushed and sterilized through multi-dimensional repeated collision, friction and shearing, meanwhile, carbon dioxide molecules permeate into micropores in the material under high pressure, microbial cell walls are destroyed through physical extrusion and chemical action, and the food is crushed and sterilized. The materials subjected to primary sterilization are driven by negative pressure of an induced draft fan to move to a grading area along with ascending airflow to be sterilized again, coarse and fine materials are separated under the action of strong centrifugal force generated by a grading turbine rotating at a high speed, and fine particles meeting the particle size requirement enter a high-temperature filter cartridge dust remover through a grading wheel; and the crushed gas is periodically and reversely blown into a sterile material collecting bin to be collected, coarse particles which do not reach the standard are separated out and conveyed to a crushing cavity to be cyclically treated after being collected, and the crushed gas is cyclically used. The method has the advantages of food safety improvement, efficient sterilization, energy conservation, environmental protection, simplicity and convenience in operation and the like.

Description

Technical Field

[0001] The invention relates to the fields of food processing technology and sterilization technology, and in particular to a high-temperature grinding powdered food pulverizing and sterilizing integrated device using high-temperature and high-pressure carbon dioxide as a pulverizing medium. Background Art

[0002] In the food processing process, sterilization and crushing are two crucial links. Sterilization can effectively eliminate harmful microorganisms in food and ensure food safety; while crushing can improve the texture, taste and processing performance of food. However, traditional sterilization and crushing technologies often have many shortcomings. When investigating and studying the production processes of food and medicines, it was found that many manufacturers crushed the materials to a suitable particle size and then sterilized them again. The process is relatively complicated and the processing capacity is limited.

[0003] For example, a Chinese invention patent with announcement number CN102499347 and name “Instant Rice Bran Powder” discloses an instant rice bran powder, in which rice bran is first subjected to stability treatment, the stabilized rice bran is crushed with a universal grinder, and the new brown rice of the year is crushed with a universal grinder, the crushed rice bran powder is extruded and puffed according to proportion, the puffed mixture is crushed with a turbine grinder, and then crushed to 200 mesh with an ultrafine grinder, and the crushed rice bran powder is disinfected and sterilized with a microwave drying and sterilizing machine at a temperature of 160-180° C. The process is complicated, and the crushing and sterilization need to be handled separately. For example, the Chinese invention patent with announcement number CN 106472954 A and titled “Fully enclosed crushing, drying and sterilizing integrated puffed food powder preparation method and device” discloses a process of enclosed crushing, drying and sterilizing of puffed food. The impeller crushing is used to limit the particle size of the food crushed. After crushing, the food is controlled to a specific particle size range of 10 to 1500 meshes. It is only suitable for puffed cereals. At the same time, the crushing and grading are configured separately, which increases the complexity of the process.

[0004] As a non-toxic, tasteless, and chemically stable gas, carbon dioxide has been widely used in the field of food preservation and processing. Studies have shown that carbon dioxide has good permeability and bactericidal ability under high pressure, and can effectively kill microorganisms in food without introducing any harmful chemicals. In addition, carbon dioxide can also be used as a green crushing medium in the food processing process, using the kinetic energy of its high-speed airflow to achieve efficient crushing of materials, reduce dust generation, and improve the quality and safety of food. The present invention proposes a high-temperature grinding powder food crushing and sterilization integrated device using high-temperature and high-pressure carbon dioxide as a crushing medium. The device combines the bactericidal effect of carbon dioxide and the efficient crushing technology of supersonic turbulence of airflow, aiming to solve the problems existing in traditional sterilization and crushing technologies. By using carbon dioxide as a crushing medium, not only can efficient crushing be achieved, but also the problem of food safety sterilization is solved. In addition, the device also has the advantages of simple structure, easy operation, energy saving and environmental protection, and can be widely used in various food processing enterprises to improve production efficiency and food safety. Summary of the invention

[0005] The purpose of the present invention is to provide an integrated device for high-temperature grinding powdered food pulverizing and sterilizing using high-temperature and high-pressure carbon dioxide as a pulverizing medium. The device can simultaneously perform pulverizing and sterilizing, solve the problem of complex process in the current food industry, and improve the quality and safety of food.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A high-temperature grinding powder food pulverizing and sterilizing integrated device using high-temperature and high-pressure carbon dioxide as a pulverizing medium, comprising: an air compressor, an air source post-processing system, a heater, a high-temperature pulverizing chamber, a high-temperature filter cartridge dust collector, an induced draft fan, a safety filter and other parts.

[0008] The feature is that: the high temperature crushing chamber includes two parts: crushing and classification;

[0009] The high-temperature pulverizing chamber is provided with a supersonic Laval nozzle, which is fixedly installed inside the pulverizing chamber;

[0010] The entire process adopts a PLC automatic control system with two-level authority management. The operating data can be stored and exported. A remote diagnosis and repair system is designed to achieve one-button start and stop, which is simple and convenient to operate.

[0011] An emergency filter and an alarm device are designed after the dust collector to prevent dust from entering the air compressor in unexpected situations;

[0012] The parameters of the high-temperature and high-pressure carbon dioxide are: temperature 100-150° C., and pressure greater than 0.4 MPa.

[0013] The water content of the sterilized food is less than 2%, and the total number of colonies is ≤8000 cfu / g;

[0014] A high-temperature grinding powdered food pulverizing and sterilizing integrated device using high-temperature and high-pressure carbon dioxide as a pulverizing medium comprises the following steps:

[0015] Carbon dioxide is heated and pressurized by an air compressor, a post-processing system and a heater. The high-temperature and high-pressure carbon dioxide is injected into the crushing chamber at high speed through the Laval nozzles distributed in a circular array, and then enters the high-temperature crushing chamber through the supersonic nozzle. It is then driven by the negative pressure of the high-pressure induced draft fan to enter the high-temperature filter cartridge dust collector, and then enters the air compressor through the safety filter for recycling. The process adopts a closed circulation system and is less affected by environmental humidity, temperature and other factors;

[0016] Powdered food is quantitatively fed into the grinding chamber through the supply pipeline. At the intersection of the airflow, the powdered food is engulfed by violent turbulence, and is crushed and sterilized after repeated collision, friction and shearing in multiple dimensions. At the same time, carbon dioxide molecules penetrate into the micropores inside the material under high pressure, destroy the cell walls of microorganisms through ultraviolet rays, physical extrusion and chemical action, and cooperate with high temperature to further enhance the sterilization effect. After the initial sterilization, the material moves to the grading area with the rising airflow driven by the negative pressure of the induced draft fan for secondary sterilization. Fine particles that meet the particle size requirements enter the high-temperature filter cartridge dust collector through the grading wheel and fall into the sterile aggregate bin for collection after periodic backblowing. Coarse particles that do not meet the standards are separated, collected and sent to the grinding chamber for circulation treatment.

[0017] As a preferred technical solution of the present invention, the food is a non-heat-sensitive powdered food.

[0018] As a preferred technical solution of the present invention, a UV lamp is installed at the bottom of the crushing chamber to emit ultraviolet rays to destroy the DNA of microorganisms.

[0019] As a preferred technical solution of the present invention, the entire device is made of food-grade 316L stainless steel, and the part in contact with the material can be lined with large pieces of alumina ceramic protective anti-sticking material according to the material properties.

[0020] As a preferred technical solution of the present invention, the entire device is made of food-grade 316L stainless steel, and the part in contact with the material can be lined with large pieces of alumina ceramic protective anti-sticking material according to the material properties.

[0021] As a preferred technical solution of the present invention, the supersonic high-temperature and high-pressure carbon dioxide gas enters the pulverizing chamber through a Laval nozzle.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] Through the action of high-temperature and high-pressure carbon dioxide, ultra-fine grinding and deep sterilization of food materials can be completed simultaneously in a single process, breaking through the limitations of "sterilization before grinding" or "segmented processing" in traditional processes, avoiding the risk of cross-contamination caused by multiple processing, and ensuring full contact between carbon dioxide and materials, significantly improving the uniformity and efficiency of sterilization, and providing an innovative technical path for the safe production of high value-added foods.

[0024] Carbon dioxide is a non-toxic, odorless, chemically stable gas. Using carbon dioxide as a sterilization medium will not introduce any harmful chemicals, ensuring food safety.

[0025] Through the temperature control system and carbon dioxide input system, the sterilization conditions can be accurately controlled according to the needs of different food materials, with flexible operation and strong adaptability.

[0026] The entire process adopts a PLC automatic control system with two-level authority management. The operating data can be stored and exported. It is designed with a remote diagnosis and repair system and can achieve one-button start and stop. It has a simple structure, easy operation, and easy maintenance and management.

[0027] Food particles are accelerated to supersonic speed in the axial acceleration area of ​​the grinding chamber nozzle. The low temperature and sub-vacuum state formed in the supersonic area will also intensify the death of bacteria. The instantaneous high-low temperature conversion makes the living environment of bacteria harsh. At the same time, the effect of ultraviolet rays makes the sterilization effect more thorough.

[0028] Carbon dioxide molecules penetrate into the micropores inside the material under high pressure, destroying the cell walls of microorganisms through physical extrusion and chemical action, and synergizing with high temperature to further enhance the sterilization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present invention.

[0030] Figure 2 It is a process flow chart of the present invention.

[0031] Among them: 1-air compressor, 2-air source post-processing system, 3-heater, 4-feeder, 5-high temperature crushing chamber, 6-high temperature cartridge dust collector, 7-induced draft fan, 8-safety filter, 9-UV lamp. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clear, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] Example 1

[0034] A high-temperature grinding powder food pulverizing and sterilizing integrated device using high-temperature and high-pressure carbon dioxide as a pulverizing medium comprises: an air compressor 1, an air source post-processing system 2, a heater 3, a high-temperature pulverizing chamber 5, a high-temperature filter cartridge dust collector 6, an induced draft fan 7, a safety filter 8 and other parts which are closed and connected in sequence.

[0035] The main operation steps of the above device are as follows: when the device is started, carbon dioxide is sent to the heater 3 after being processed by the air compressor 1, and is heated and pressurized in the closed-loop temperature control system. High-temperature and high-pressure carbon dioxide is injected into the crushing chamber 5 at high speed through the nozzles distributed in the annular array to form a high-speed airflow. Powdered food is quantitatively put into the crushing chamber 5 through the supply pipeline. The powdered food is engulfed by violent turbulence at the intersection of the airflow, and is crushed and sterilized after repeated collision, friction, and shearing in multiple dimensions. At the same time, carbon dioxide molecules penetrate into the micropores inside the material under high pressure, destroy the cell wall of microorganisms through physical extrusion and chemical action, and cooperate with high temperature to further enhance the sterilization effect. The material after the initial sterilization moves to the classification area with the rising airflow under the negative pressure drive of the induced draft fan 7 for re-sterilization. Under the strong centrifugal force generated by the high-speed rotating classification turbine, the coarse and fine materials are separated, and the fine particles that meet the particle size requirements enter the high-temperature cartridge dust collector 6 through the classification wheel, and fall into the sterile collection bin for collection after periodic backblowing. The coarse particles that do not meet the standards are separated, collected and sent to the crushing chamber 5 for circulation, and the crushing gas is recycled. The entire process can dynamically adjust the carbon dioxide pressure, temperature and air flow rate according to the material characteristics to ensure the sterilization rate while retaining the color, flavor and heat-sensitive nutrients of the sample to the maximum extent.

[0036] The parameters of the treated carbon dioxide are: temperature 100-150°C, pressure greater than 0.4MPa, and the non-heat-sensitive powdered food is subjected to the high-temperature and high-pressure airflow, and the moisture content of the final product is measured to be less than 2%, and the total number of colonies is ≤8000cfu / g.

[0037] Example 2

[0038] Example 2 is based on Example 1, and the high-temperature crushing chamber includes two parts: crushing and grading; a UV lamp is provided at the bottom of the high-temperature crushing chamber, which can emit ultraviolet rays to destroy the DNA of microorganisms and sterilize large-particle sedimentation food particles by ultraviolet rays; the sterilization of food can be roughly composed of three parts: the core airflow acceleration zone. The powdered food is engulfed by violent turbulence at the intersection of the airflow, and is crushed and sterilized after repeated collisions, friction, and shearing in multiple dimensions. At the same time, carbon dioxide molecules penetrate into the micropores inside the material under high pressure, destroy the cell walls of microorganisms through physical extrusion and chemical action, and cooperate with high temperature to further enhance the sterilization effect; the bottom area of ​​the crushing chamber. Large-particle food is sterilized under the action of ultraviolet rays; the eddy current grading zone. Sterilized again under the strong centrifugal force generated by the high-speed rotating grading turbine.

[0039] The high-temperature pulverizing chamber of the food is provided with a supersonic Laval nozzle, which is fixedly installed on the inner side of the pulverizing chamber through a circular array distribution, and the nozzle of high-temperature and high-pressure carbon dioxide is injected into the pulverizing chamber at a high speed.

[0040] Example 3

[0041] Example 3 is based on Example 1 and Example 2. The entire process adopts a PLC automatic control system with two-level authority management. The operating data can be stored and exported. A remote diagnosis and repair system is designed, which can achieve one-button start and stop, and the operation is simple and convenient.

[0042] Example 4

[0043] On the basis of Example 1, Example 2 and Example 3, the gas outlet of the high-temperature cartridge dust collector 5 is closed and connected through the induced draft fan 7 and the safety filter 8; an emergency filter and an alarm device are designed after the dust collector to prevent dust from accidentally entering the air compressor; the carbon dioxide flowing out of the high-temperature cartridge dust collector 5 is recycled through a secondary safety filter, and the entire system is a closed system, which reduces gas consumption.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described with reference to the preferred embodiments of the present invention, it should be understood by those skilled in the art that various changes may be made in form and details without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A high-temperature grinding powdered food pulverizing and sterilizing integrated device using high-temperature and high-pressure carbon dioxide as a pulverizing medium, characterized in that: The device comprises an air compressor, an air source post-processing system, a heater, a high-temperature crushing chamber, a high-temperature filter cartridge dust collector, an induced draft fan, a safety filter and other parts; the high-temperature crushing chamber comprises two parts, a crushing part and a grading part; a supersonic Laval nozzle is arranged on the crushing chamber and is fixedly installed on the inner side of the crushing chamber; the whole process adopts a PLC automatic control system with two-level authority management, the operation data can be stored and exported, a remote diagnosis and repair system is designed, and one-button start and stop can be achieved, which is simple and convenient to operate; an emergency filter and an alarm device are designed after the dust collector to prevent dust from entering the air compressor in unexpected situations; the food is suitable for non-heat-sensitive powdered food; the parameters of the high-temperature and high-pressure carbon dioxide are: temperature 100-150°C, pressure greater than 0.4MPa; the moisture content of the sterilized food is less than 2%, and the total colony count is ≤8000cfu / g. The method is characterized in that it comprises the following steps: (1) carbon dioxide is heated and pressurized by an air compressor and a heater, and the high-temperature and high-pressure carbon dioxide is injected into the crushing chamber at high speed through the Laval nozzles distributed in a ring array, and then enters the high-temperature crushing chamber through the supersonic nozzle, and then enters the high-temperature filter cartridge dust collector through the negative pressure drive of the high-pressure induced draft fan, and then enters the air compressor for recycling through the safety filter. The process adopts a closed circulation system and is less affected by environmental humidity, temperature and other factors; (2) Powdered food is quantitatively fed into the crushing chamber through the supply pipeline. At the intersection of the airflow, it is swept by violent turbulence and undergoes repeated collisions, friction, and shearing in multiple dimensions to be crushed and sterilized. At the same time, carbon dioxide molecules penetrate into the micropores inside the material under high pressure, destroy the cell walls of microorganisms through ultraviolet rays, physical extrusion, and chemical reactions, and further enhance the sterilization effect in synergy with high temperature. After the initial sterilization, the material moves with the rising airflow to the classification area for secondary sterilization under the negative pressure of the induced draft fan. Fine particles that meet the particle size requirements pass through the classification wheel into the high-temperature filter cartridge dust collector and are periodically backblown and fall into the sterile collection bin for collection. Coarse particles that do not meet the standards are separated and sent to the crushing chamber for recycling treatment after collection.

2. The integrated device for sterilizing and crushing food by using steam kinetic energy grinding with carbon dioxide as the medium according to claim 1 is characterized in that: A UV lamp that emits ultraviolet light is installed at the bottom of the crushing chamber to destroy the DNA of microorganisms.

3. The integrated device for sterilizing and crushing food by using steam kinetic energy grinding with carbon dioxide as the medium according to claim 1 is characterized in that The entire equipment is made of food-grade 316L stainless steel, and the part in contact with the material can be lined with large pieces of alumina ceramic protective anti-sticking material according to the characteristics of the material.

4. The high-temperature grinding powdered food pulverizing and sterilizing integrated device using high-temperature and high-pressure carbon dioxide as a pulverizing medium according to claim 1, characterized in that: The high-temperature and high-pressure carbon dioxide gas flow ejected from the nozzle can instantly crush and sterilize powdered food, thereby greatly improving the crushing and sterilization efficiency of food.

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