A supercritical CO2 fluid extraction process for chicken essence

Abstract

The present invention relates to the field of food processing technology, specifically to a supercritical CO2 fluid extraction chicken essence process, including an extractor, a third separator, a heat exchanger, a liquid pump, a CO2 storage, a chicken sterilization box, an extraction phase heat exchanger, a plate heat exchanger, a first separator, a second separator and a condenser, and the process includes the following steps: liquid CO2 passes through a plurality of heat exchangers to form supercritical CO2, enters the interior of the extractor for extraction, and the supercritical fluid CO2 flows through the three-stage separator in sequence for separation, and flows out from the upper part of the separator, and the chicken essence inside the separator is taken out through the bottom of the separator. The supercritical CO2 fluid of the present invention has a certain critical temperature and pressure to extract the chicken fluid, and has the advantages of non-toxicity and low material cost, and reduces the water content of the chicken essence to less than 0.1%. Compared with the traditional process, it has the advantages of short production cycle, simple process, high extraction efficiency and high product purity.

Description

Technical Field

[0001] The invention relates to a process for extracting chicken essence, in particular to a process for extracting chicken essence with supercritical CO2 fluid, and belongs to the technical field of food processing. Background Art

[0002] The extraction of chicken essence is to extract the essence of the chicken drop by drop, and hydrolyze the protein in the chicken into polypeptides. The small molecules are conducive to absorption and have high nutritional value. It is a better way of nutritional supplementation. It involves placing the raw chicken in a closed drip barrel, heating the water vapor outside the drip barrel for pressurized vaporization extraction to obtain chicken essence. However, this kind of chicken essence is not suitable for people with hyperuricemia and gout.

[0003] At present, chicken essence is extracted from chicken liquid by steam dripping, but the extraction is insufficient and the efficiency is low. Therefore, it is urgent to improve the chicken essence extraction system to solve the above-mentioned problems. Summary of the invention

[0004] The purpose of the present invention is to provide a process for extracting chicken essence by supercritical CO2 fluid. Supercritical CO2 fluid has a certain critical temperature and pressure to extract chicken fluid, and has the advantages of being non-toxic and having low material cost, and can reduce the water content of dairy chicken essence to less than 0.1%. Compared with traditional processes, the process has the advantages of short production cycle, simple process, high extraction efficiency and high product purity.

[0005] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0006] A supercritical CO2 fluid extraction chicken essence process includes an extractor, a third separator, a heat exchanger, a liquid pump, a CO2 storage, a chicken sterilization box, an extraction phase heat exchanger, a plate heat exchanger, a first separator, a second separator and a condenser. The process includes the following steps:

[0007] Step 1: Extraction of chicken essence, the extraction process includes the following steps;

[0008] S1: The chicken to be extracted is placed in a chicken sterilization box for sterilization, and then the temperature is adjusted through a plate heat exchanger to bake the chicken, and the chicken essence oil overflowed after baking is discharged into the extractor for pre-concentration and purification of chicken essence, so that the content of chicken essence in the extractor reaches 75%, and the temperature in the plate heat exchanger is maintained at 40-60°C, and the pressure in the extractor is in the range of 10-15Pa;

[0009] S2: The liquid pump extracts the liquid CO2 from the CO2 storage tank, and then passes through the exchanger to form supercritical CO2, which then enters the extractor for extraction. The flow rate of the supercritical CO2 entering the extractor is 20-50L / h, and the chicken essence is extracted in the extractor for 1-2 hours;

[0010] Step 2: separation of chicken essence. The CO2 fluid extracted by the extractor enters the extraction phase heat exchanger and is separated in the first separator under the action of the extraction phase heat exchanger. The temperature of the extraction phase heat exchanger is maintained at 95-98°C. The pressure of the above separator is 10-20Pa, and the temperature of the above separators is 40-60°C. The high-pressure fluid carrying the chicken essence extract flowing out of the first separator is sent to the second separator for separation. The concentrated fluid after separation in the second separator enters the third separator. The separated chicken essence extract remains in the separator, and the extracted chicken essence is extracted from the bottom of the separator.

[0011] Step 3: Supercritical Fluid CO 2， For recycling, the supercritical fluid CO2 discharged from the third separator is directly discharged into the heat exchanger and condenser, and then discharged into the extractor by the liquid pump for recycling.

[0012] Preferably, the CO2 liquid in step 2 passes through a heat exchanger under the action of a liquid pump, forms a subcritical or supercritical CO2 fluid under the action of the heat exchanger and is pressurized by the liquid pump into the extractor.

[0013] Preferably, the extraction and separation time of the chicken essence to be extracted from step 1 to step 2 is 2-4 hours.

[0014] Preferably, the supercritical CO2 discharged from the third separator in step three is discharged into the condenser through a liquid pump, and is discharged into the heat exchanger again by the liquid pump under the action of the condenser, and then re-enters the extractor.

[0015] Preferably, the separator in step 2 is a three-stage separator, and the supercritical fluid CO2 flows through the three-stage separator in sequence for separation.

[0016] Preferably, in step 2, all gas valves should be in a closed state when diverting, wherein the first separator, the second separator and the third separator are all fixedly provided with a safety valve, an air inlet switch, an air outlet valve and a fine-tuning valve.

[0017] Preferably, the supercritical fluid CO2 flows out from the upper part of the three separators and takes out the chicken essence inside the three separators through the bottom of the three separators.

[0018] Preferably, the separator is connected to the heat exchanger through a pipeline, the heat exchanger is connected to the condenser, and the condenser is connected to the liquid pump through a pipeline.

[0019] Preferably, one end of the heat exchanger is connected to the bottom of the extractor through a feed pipe, and a second heat exchanger is connected between the heat exchanger and the extractor.

[0020] The present invention has at least the following beneficial effects:

[0021] 1. Supercritical CO2 fluid has certain critical temperature and pressure, and has the advantages of non-toxicity and low material cost. It reduces the water content of chicken essence to less than 0.1%. Compared with traditional processes, it has the advantages of short production cycle, simple process, high extraction efficiency and high product purity.

[0022] 2. The supercritical CO2 discharged from the third separator is discharged into the condenser through a liquid pump, and is then discharged into the heat exchanger again by the liquid pump under the action of the condenser, and a new round of circulation is carried out to realize the recycling of CO2, thereby effectively saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 It is a structural diagram of the process equipment of the present invention;

[0025] Figure 2 It is a schematic diagram of the process flow of the present invention.

[0026] In the figure, 1-extractor, 2-third separator, 3-heat exchanger, 4-liquid pump, 5-CO2 storage, 6-chicken sterilization box, 7-extraction phase heat exchanger, 8-plate heat exchanger, 9-first separator, 10-second separator, 11-condenser, 12-second heat exchanger. DETAILED DESCRIPTION

[0027] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0028] like Figure 1 As shown, the supercritical CO2 fluid extraction chicken essence process provided in this embodiment includes an extractor 1, a third separator 2, a heat exchanger 3, a liquid pump 4, a CO2 storage 5, a chicken sterilization box 6, an extraction phase heat exchanger 7, a plate heat exchanger 8, a first separator 9, a second separator 10 and a condenser 11. The process includes the following steps:

[0029] Step 1: Extracting chicken essence, the extraction process includes the following steps;

[0030] S1: The chicken to be extracted is placed in a chicken sterilization box 6 for sterilization, and then the temperature is adjusted through a plate heat exchanger 8 to bake the chicken, and the chicken essence oil overflowed after baking is discharged into the extractor 1 for pre-concentration and purification of chicken essence, so that the content of chicken essence in the extractor 1 reaches 75%, and the temperature in the plate heat exchanger 8 is maintained at 40-60° C., and the pressure in the extractor 1 is in the range of 10-15 Pa;

[0031] S2: The liquid pump 4 extracts the liquid CO2 from the CO2 storage tank 5, and then forms supercritical CO2 after passing through the exchanger 3. The CO2 liquid passes through the heat exchanger 3 under the action of the liquid pump 4, and forms a subcritical or supercritical CO2 fluid under the action of the heat exchanger 3. The supercritical CO2 fluid has a certain critical temperature and pressure, and has the advantages of being non-toxic and having low material costs. It is pressurized by the liquid pump 4 and enters the extractor 1, and then enters the interior of the extractor 1 for extraction. The flow rate of the above-mentioned supercritical CO2 entering the extractor 1 is 20-50L / h, and the extraction time of the above-mentioned chicken essence in the extractor 1 is 1-2 hours.

[0032] Step 2: Separate the chicken essence. The CO2 fluid extracted by the extractor 1 enters the extraction phase heat exchanger 7, and is separated in the first separator 9 under the action of the extraction phase heat exchanger 7. The temperature of the extraction phase heat exchanger 7 is maintained at 95-98°C, the pressure of the above separator is 10-20Pa, and the temperature of the above separators is 40-60°C. The high-pressure fluid carrying the chicken essence extract flowing out of the first separator 9 is sent to the second separator 10 for separation. The concentrated fluid after separation by the second separator 10 enters the third separator 2, and the separated chicken essence extract remains in the separator, and the extracted chicken essence is extracted from the bottom of the separator.

[0033] Step 3: Supercritical Fluid CO 2， For recycling, the supercritical fluid CO2 discharged from the third separator 2 is directly discharged into the heat exchanger 3 and the condenser 11, and then discharged into the extractor 1 by the liquid pump 4 for recycling.

[0034] In this embodiment, if Figure 1 As shown, the extraction and separation time of the chicken essence to be extracted from step one to step two is 2-4 hours. Compared with the traditional process, it has the advantages of short production cycle, simple process, high extraction efficiency and high product purity.

[0035] In this embodiment, if Figure 1As shown, the supercritical CO2 discharged from the third separator 2 in step three is discharged into the condenser 11 through the liquid pump 4, and is discharged into the heat exchanger 3 by the liquid pump 4 under the action of the condenser 11, and then re-enters the extractor 1, and the supercritical CO2 discharged from the third separator is discharged into the condenser through the liquid pump, and is discharged into the heat exchanger by the liquid pump under the action of the condenser, and a new round of circulation is carried out to realize the recycling of CO2, thereby effectively saving production costs.

[0036] In this embodiment, if Figure 1 As shown, the separator in step 2 is a three-stage separator, and the supercritical fluid CO2 flows through the three-stage separator in sequence for separation, which effectively improves the purity of the product.

[0037] In this embodiment, if Figure 1 As shown, in step 2, all gas valves should be in a closed state when performing separation, wherein the first separator 9, the second separator 10 and the third separator 2 are all fixedly provided with a safety valve, an air inlet switch, an air outlet valve and a fine-tuning valve to improve the sealing performance of the device and the extraction efficiency.

[0038] In this embodiment, if Figure 1 As shown, supercritical fluid CO2 flows out from the upper part of the three separators, and takes out the chicken essence inside the three separators through the bottom of the three separators, which is convenient for collecting the used CO2 and helps save production costs.

[0039] In this embodiment, if Figure 1 As shown, one end of the heat exchanger 3 is connected to the bottom of the extractor 1 through a feed pipe, and a second heat exchanger 12 is connected between the heat exchanger 3 and the extractor 1, which promotes the utilization rate of CO2 and realizes the recycling of CO2, and has the advantages of high extraction efficiency and high product purity.

[0040] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0041] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0042] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A supercritical CO2 fluid extraction chicken essence process, characterized in that: The process comprises an extractor (1), a third separator (2), a heat exchanger (3), a liquid pump (4), a CO2 storage (5), a chicken sterilization box (6), an extraction phase heat exchanger (7), a plate heat exchanger (8), a first separator (9), a second separator (10) and a condenser (11). The process comprises the following steps: Step 1: Extraction of chicken essence, the extraction process includes the following steps; S1: The chicken to be extracted is placed in a chicken sterilization box (6) for sterilization, and then the temperature is adjusted through a plate heat exchanger (8) to bake the chicken. The chicken essence oil overflowing from the baking of the chicken is discharged into the extractor (1) for pre-concentration and purification of the chicken essence, so that the weight content of the chicken essence in the extractor (1) reaches 75%. The temperature in the plate heat exchanger (8) is maintained at 40-60° C., and the pressure in the extractor (1) is in the range of 10-15 Pa; S2: The liquid pump (4) extracts the liquid CO2 from the CO2 storage tank (5), and then passes through the heat exchanger (3) to form supercritical CO2, which then enters the extractor (1) for extraction. The flow rate of the supercritical CO2 entering the extractor (1) is 20-50 L / h, and the chicken essence is extracted in the extractor (1) for 1-2 hours; Step 2: separation of chicken essence. The CO2 fluid extracted by the extractor (1) enters the extraction phase heat exchanger (7), and is separated in the first separator (9) under the action of the extraction phase heat exchanger (7). The temperature of the extraction phase heat exchanger (7) is maintained at 95-98°C. The pressure of the separator is 10-20Pa. The temperature of the first separator (9) is 40-60°C. The high-pressure fluid carrying the chicken essence extract flowing out of the first separator (9) is sent to the second separator (10) for separation. The concentrated fluid after separation in the second separator (10) enters the third separator (2). The separated chicken essence extract remains in the second separator (10). The extracted chicken essence is extracted from the bottom of the first separator (9), the second separator (10) and the third separator (2). Step 3: Recycling of supercritical fluid CO2. The supercritical fluid CO2 discharged from the third separator (2) is directly discharged into the heat exchanger (3) and the condenser (11), and then discharged into the extractor (1) by the liquid pump (4) for recycling.

2. The supercritical CO2 fluid extraction chicken essence process according to claim 1, characterized in that: The total extraction and separation time of the chicken essence to be extracted from step 1 to step 2 is 2-4 hours.

3. The supercritical CO2 fluid extraction chicken essence process according to claim 1, characterized in that: The first separator (9), the second separator (10) and the third separator (2) are all fixedly provided with a safety valve, an air inlet switch, an air outlet valve and a fine-tuning valve.

4. The process for extracting chicken essence by supercritical CO2 fluid according to claim 1, characterized in that: The supercritical fluid CO2 flows out from the upper part of the three separators and takes out the chicken essence inside the three separators through the bottom of the three separators.

5. The process for extracting chicken essence by supercritical CO2 fluid according to claim 1, characterized in that: The third separator (2) is connected to the heat exchanger (3) via a pipeline, the heat exchanger (3) is connected to the condenser (11), and the condenser (11) is connected to the liquid pump (4) via a pipeline.

6. The process for extracting chicken essence by supercritical CO2 fluid according to claim 1, characterized in that: One end of the heat exchanger (3) is connected to the bottom of the extractor (1) via a feed pipe, and a second heat exchanger (12) is connected between the heat exchanger (3) and the extractor (1).

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