Salmon and trout viscera crude fish oil extraction system

Abstract

The utility model belongs to the technical field of aquatic product processing, and particularly relates to a salmon and trout viscera crude fish oil extraction system. Comprising a raw material storage box used for storing salmon and trout visceral meat slurry, a screw feeder used for conveying the visceral meat slurry in the raw material storage box to a stacked screw machine, the stacked screw machine used for conducting filter pressing on the visceral meat slurry and separating the visceral meat slurry into residues and an oil slurry mixture, and a temporary storage box used for containing the oil slurry mixture. The settling tower is used for cooking the oil-slurry mixture to extract crude fish oil, the plate-and-frame filter is used for filtering the crude fish oil to remove viscera waste, and the crude fish oil storage box is used for containing the filtered crude fish oil. The system is optimized and improved on the basis of a cooking process route, the extraction rate of crude fish oil is improved, and the whole system has the characteristics of low cost, simplicity and high efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of aquatic product processing technology, specifically relating to a crude fish oil extraction system for salmon and trout viscera. Background Technology

[0002] Fish oil is an oil extracted from oily fish. It is rich in various n-3 polyunsaturated fatty acids, such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA, commonly known as brain gold), and comes from fatty deep-sea fish.

[0003] Salmon and trout are high-protein, high-fat, and low-cholesterol (cholesterol content is negligible) fish. Compared to other fish, salmon and trout contain glycine, which is lacking in most fish, and have higher levels of vitamins A and B. Their iron content is also higher than that of other fish. The content of omega-3 (Ω-3) highly unsaturated fatty acids (EPA, EHA, and DHA) in salmon and trout is several times higher than that in other fish. For a long time, my country's salmon and trout processing industry has been in a state of extensive processing, generating a large amount of processing waste during the processing of fish fillets, accounting for about 50% of the total fish weight, of which the viscera contain as much as 25% crude fat. However, due to the lack of corresponding in-depth development, most of these salmon and trout viscera are currently used as low-value feed ingredients, resulting in a huge waste of resources and limiting the development of the salmon and trout industry.

[0004] Traditional fish oil extraction methods include cooking, alkaline hydrolysis, and solvent extraction. These methods yield crude fish oil, which then undergoes a series of processes such as fine filtration, degumming, deacidification, washing, drying, decolorization, winterization, deodorization, and conditioning to obtain refined fish oil. Each of these methods has its own drawbacks: cooking results in a low fish oil extraction rate; alkaline hydrolysis produces wastewater with high sodium content, causing environmental pollution; and solvent extraction involves the volatilization of petroleum ether and diethyl ether, leading to economic losses and environmental pollution. Utility Model Content

[0005] To address the shortcomings of the existing technologies, this invention provides a crude fish oil extraction system for salmon and trout viscera. Based on the steaming process, this system is optimized and improved, increasing both raw material utilization and crude fish oil extraction rate. Furthermore, it uses only physical methods without the addition of chemical reagents, ensuring the purity of the crude extracted fish oil. The entire system is characterized by low cost, simplicity, and high efficiency.

[0006] The present invention discloses a crude fish oil extraction system for salmon and trout viscera, comprising:

[0007] The raw material storage box is used to store salmon and trout viscera paste. The bottom of the raw material storage box is connected to the screw feeder through a pipe.

[0008] The screw feeder is used to transport offal and meat paste from the raw material storage tank to the screw press.

[0009] The screw press is used to press and filter offal meat paste and separate it into a mixture of residue and oil. The oil mixture outlet of the screw press is connected to a temporary storage tank via a pipe and centrifugal pump A.

[0010] The temporary storage tank is used to hold the oil slurry mixture. The bottom of the temporary storage tank is connected to the settling tower through a pipe and centrifugal pump B.

[0011] The settling towers are set up in several groups to cook the oil slurry mixture to extract crude fish oil. Each settling tower is equipped with a heating device, and the bottom of each settling tower is connected to a plate and frame filter press through a pipe and a centrifugal pump C.

[0012] Plate and frame filter presses are used to filter crude fish oil to remove visceral waste. The crude fish oil outlet of the plate and frame filter press is connected to the crude fish oil storage tank through a pipe.

[0013] Crude fish oil storage tank, used to hold filtered crude fish oil.

[0014] As a preferred embodiment, the system also includes a PLC controller, the signal output terminal of which is electrically connected to the signal input terminals of the screw feeder, screw press, plate and frame filter, heating device, centrifugal pump A, centrifugal pump B, and centrifugal pump C.

[0015] As a preferred embodiment, a liquid level sensor is provided on the upper inner wall of the temporary storage box, and the signal output terminal of the liquid level sensor is electrically connected to the signal input terminal of the PLC controller.

[0016] As a preferred embodiment, a solenoid valve is installed on the pipe connected to the bottom of the temporary storage box, and the signal input terminal of the solenoid valve is electrically connected to the signal output terminal of the PLC controller.

[0017] As a preferred embodiment, a solenoid valve is installed on the pipe connected to the feed inlet of each settling tower, and the signal input terminal of the solenoid valve is electrically connected to the signal output terminal of the PLC controller.

[0018] As a preferred embodiment, each of the settling towers is equipped with a solenoid valve on the pipe connected to the bottom of the settling tower, and the signal input terminal of the solenoid valve is electrically connected to the signal output terminal of the PLC controller.

[0019] As a preferred embodiment, each of the settling towers is equipped with a temperature sensor, and the signal output terminal of the temperature sensor is electrically connected to the signal input terminal of the PLC controller.

[0020] As a preferred embodiment, each settling tower includes a straight section and a conical section, with the conical section located at the bottom of the straight section, and the height ratio of the straight section to the conical section being 6-8:1.

[0021] As a preferred embodiment, the heating device is an annular heating belt, which is fitted onto the lower outer wall of the straight section of the settling tower.

[0022] As a preferred embodiment, a transparent observation window is provided on the upper outer wall of the straight section of each settling tower.

[0023] The advantages of this utility model are:

[0024] (1) Based on the steaming process, crude fish oil extraction was optimized and improved by setting up a screw press to press the visceral meat paste to obtain some oil, thereby increasing the crude fish oil extraction rate and further separating it into residue (mainly some connective tissues that are difficult to grind into meat paste during the process of mincing viscera) and oil paste mixture, which effectively improved the utilization rate of raw materials for subsequent steaming reaction.

[0025] (2) By setting up different numbers of sedimentation towers, the extraction requirements of crude fish oil from salmon viscera in actual production can be met, and the production scale can be controlled.

[0026] (3) All functional components are controlled by a PLC controller, which effectively reduces labor intensity. During the cooking process, the heating temperature is controlled to be no higher than 60°C to avoid oxidation of monounsaturated or polyunsaturated fatty acids in oils due to high temperature, forming trans fatty acids or toxic and harmful substances, thus improving the purity and quality of crude fish oil.

[0027] (4) Compared with the traditional cooking method for extracting crude fish oil, after cooking, the material is no longer selectively drawn from the top of the settling tower, but is pumped out from the bottom of the settling tower and filtered through a plate and frame filter press, thereby maximizing the extraction of crude fish oil. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the crude fish oil extraction system for salmon viscera in Example 1;

[0030] In the diagram: 1. Raw material storage tank; 2. Screw feeder; 3. Screw press; 4. Centrifugal pump A; 5. Temporary storage tank; 6. Centrifugal pump B; 7. Settling tower; 8. Heating belt; 9. Transparent observation window; 10. Centrifugal pump C; 11. Plate and frame filter; 12. Crude fish oil storage tank; 13. Solenoid valve. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] In the description of this utility model, it should be noted that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Example 1:

[0035] like Figure 1 As shown, a crude fish oil extraction system for salmon and trout viscera includes:

[0036] Raw material storage box 1 is used to store salmon viscera paste, which is obtained by mincing salmon viscera. The bottom of raw material storage box 1 is connected to screw feeder 2 through a pipe.

[0037] Screw feeder 2 is used to transport offal meat paste from raw material storage box 1 to screw press 3;

[0038] The screw press 3 is used to press and filter the offal meat paste and separate it into a mixture of residue and oil. The oil mixture outlet of the screw press 3 is connected to the temporary storage tank 5 through a pipe and centrifugal pump A4.

[0039] Temporary storage tank 5 is used to hold oil slurry mixture. The bottom of temporary storage tank 5 is connected to settling tower 7 through pipe and centrifugal pump B6.

[0040] Settling tower 7 is provided in two sets for cooking the oil slurry mixture to extract crude fish oil. Each set of settling tower 7 is equipped with a heating device. The bottom of each set of settling tower 7 is connected to the plate and frame filter 11 through a pipe and a centrifugal pump C10.

[0041] Plate and frame filter 11 is used to filter crude fish oil to remove visceral waste (mainly visceral residue after cooking). The crude fish oil outlet of plate and frame filter 11 is connected to crude fish oil storage tank 12 through a pipeline.

[0042] Crude fish oil storage tank 12 is used to hold filtered crude fish oil.

[0043] In one specific implementation, the system also includes a PLC controller. The signal output terminal of the PLC controller is electrically connected to the signal input terminals of the screw feeder 2, the screw press 3, the plate and frame filter 11, the heating device, the centrifugal pump A4, the centrifugal pump B6, and the centrifugal pump C10. By controlling the start and stop of the above-mentioned functional components through the PLC controller, labor intensity and safety hazards can be effectively reduced.

[0044] In one specific embodiment, a liquid level sensor is installed on the upper inner wall of the temporary storage tank 5, and the signal output terminal of the liquid level sensor is electrically connected to the signal input terminal of the PLC controller. A solenoid valve 13 is installed on the pipe connected to the bottom of the temporary storage tank 5, and the signal input terminal of the solenoid valve 13 is electrically connected to the signal output terminal of the PLC controller. When the oil slurry mixture in the temporary storage tank 5 rises with the liquid level, the liquid level sensor is triggered to send a signal to the PLC controller. Then, the PLC controller controls the activation of the solenoid valve 13 and the centrifugal pump B6 on the pipe connected to the bottom of the temporary storage tank 5, pumping the oil slurry mixture into the settling tower 7.

[0045] In one specific implementation, a solenoid valve 13 is installed on the pipe connected to the feed inlet of each settling tower 7. The signal input terminal of the solenoid valve 13 is electrically connected to the signal output terminal of the PLC controller. By setting the solenoid valve 13, the feed of each settling tower 7 can be controlled individually, which facilitates the adjustment of the production scale.

[0046] In one specific implementation, a solenoid valve 13 is installed on the pipe connected to the bottom of each settling tower 7. The signal input terminal of the solenoid valve 13 is electrically connected to the signal output terminal of the PLC controller. After cooking, the PLC controller controls the solenoid valve 13 and the centrifugal pump C10 to pump the crude fish oil to the plate and frame filter 11.

[0047] In one specific implementation, each of the settling towers 7 is equipped with a temperature sensor, the signal output terminal of which is electrically connected to the signal input terminal of the PLC controller. The temperature sensor monitors the temperature inside the settling tower 7 in real time to prevent the oxidation of monounsaturated or polyunsaturated fatty acids due to high temperatures, thus avoiding the formation of trans fatty acids or toxic and harmful substances. When the temperature rises to a preset temperature, the temperature sensor sends a signal to the PLC controller, which then controls the heating device to shut down. When the temperature drops to the preset temperature, the temperature sensor sends a signal to the PLC controller, which then controls the heating device to turn on.

[0048] In one specific implementation, each settling tower 7 includes a straight section and a conical section, with the conical section located at the bottom of the straight section. The height ratio of the straight section to the conical section is 6:1, ensuring that the material inside the settling tower 7 is heated as evenly as possible while meeting the discharge requirements.

[0049] In one specific embodiment, the heating device is an annular heating belt 8, which is sleeved on the lower outer wall of the straight section of the settling tower 7. The annular heating belt 8 can ensure uniform heating.

[0050] As one specific implementation, a transparent observation window 9 is provided on the upper outer wall of the straight section of each settling tower 7 to facilitate observation of the crude fish oil extraction process.

[0051] In this embodiment, 300 kg of salmon viscera slurry is added to the raw material storage tank 1. After being filtered by the screw press 3, 224 kg of oil slurry mixture is produced. Subsequently, it is cooked in the settling tower 7 and filtered by the plate and frame filter 11 to obtain 151 kg of crude fish oil. The overall crude fish oil extraction rate is calculated to be 50.3%, while the crude fish oil extraction rate of the traditional cooking method is about 25-40%, which greatly improves the extraction rate.

[0052] The above is a detailed description of this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A crude fish oil extraction system for salmon and trout viscera, characterized in that, include: The raw material storage box is used to store salmon and trout viscera paste. The bottom of the raw material storage box is connected to the screw feeder through a pipe. The screw feeder is used to transport offal and meat paste from the raw material storage tank to the screw press. The screw press is used to press and filter offal meat paste and separate it into a mixture of residue and oil. The oil mixture outlet of the screw press is connected to a temporary storage tank via a pipe and centrifugal pump A. The temporary storage tank is used to hold the oil slurry mixture. The bottom of the temporary storage tank is connected to the settling tower through a pipe and centrifugal pump B. The settling towers are set up in several groups to cook the oil slurry mixture to extract crude fish oil. Each settling tower is equipped with a heating device, and the bottom of each settling tower is connected to a plate and frame filter press through a pipe and a centrifugal pump C. Plate and frame filter presses are used to filter crude fish oil to remove visceral waste. The crude fish oil outlet of the plate and frame filter press is connected to the crude fish oil storage tank through a pipe. Crude fish oil storage tank, used to hold filtered crude fish oil.

2. The crude fish oil extraction system for salmon and trout viscera according to claim 1, characterized in that, It also includes a PLC controller, whose signal output terminal is electrically connected to the signal input terminals of the screw feeder, screw press, plate and frame filter, heating device, centrifugal pump A, centrifugal pump B, and centrifugal pump C.

3. The crude fish oil extraction system for salmon and trout viscera according to claim 2, characterized in that, A liquid level sensor is installed on the upper inner wall of the temporary storage box, and the signal output terminal of the liquid level sensor is electrically connected to the signal input terminal of the PLC controller.

4. The crude fish oil extraction system for salmon and trout viscera according to claim 2, characterized in that, A solenoid valve is installed on the pipe connected to the bottom of the temporary storage box, and the signal input terminal of the solenoid valve is electrically connected to the signal output terminal of the PLC controller.

5. The crude fish oil extraction system for salmon and trout viscera according to claim 2, characterized in that, Each settling tower is equipped with a solenoid valve on the pipe connected to its feed inlet. The signal input terminal of the solenoid valve is electrically connected to the signal output terminal of the PLC controller.

6. The crude fish oil extraction system for salmon and trout viscera according to claim 2, characterized in that, Each of the settling towers is equipped with a solenoid valve on the pipe connected to the bottom of the tower. The signal input terminal of the solenoid valve is electrically connected to the signal output terminal of the PLC controller.

7. The crude fish oil extraction system for salmon and trout viscera according to claim 2, characterized in that, Each of the settling towers is equipped with a temperature sensor, and the signal output terminal of the temperature sensor is electrically connected to the signal input terminal of the PLC controller.

8. The crude fish oil extraction system for salmon and trout viscera according to claim 1, characterized in that, Each settling tower includes a straight section and a conical section, with the conical section located at the bottom of the straight section, and the height ratio of the straight section to the conical section is 6-8:

1.

9. A crude fish oil extraction system for salmon and trout viscera according to claim 8, characterized in that, The heating device is a ring-shaped heating belt, which is fitted onto the lower outer wall of the straight section of the settling tower.

10. A crude fish oil extraction system for salmon and trout viscera according to claim 8, characterized in that, Each settling tower has a transparent observation window on the upper outer wall of its straight section.

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