Raw material production equipment for pet prescription food

Abstract

The raw material production equipment comprises a reaction kettle, a first electric heating wire is spirally wound on the outer wall of the reaction kettle, and a first cooling pipe is spirally wound on the inner wall of the reaction kettle; a stirring shaft, a stirring paddle and a scraping plate which are made of heat conduction materials are arranged in the middle of the reaction kettle, the stirring shaft, the stirring paddle and the scraping plate are hollow and internally provided with a second electric heating wire and a second cooling pipe which are tightly attached to the inner wall, and the scraping plate is tightly attached to the inner wall of the reaction kettle; the electric heating wires and the cooling pipes are arranged outside and inside the reaction kettle, so that the raw materials can be heated or cooled inside and outside at the same time, the production efficiency is improved, the temperature difference between the inside and the outside of the raw materials is reduced, and the production quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pet food, in particular to a raw material production equipment for pet prescription food. BACKGROUND

[0002] With the continuous development of the pet industry, pet owners pay more and more attention to the health of pets. Pet prescription food, as a kind of full-value pet food specially formulated to meet the nutritional needs of pets in specific physiological and pathological states, has gradually increased market demand. Pet prescription food is different from ordinary pet food. It needs to increase or limit nutrients according to the specific disease or physiological condition of pets to provide specific nutritional solutions suitable for pets in the disease course, pathological recovery period, and post-recovery observation period.

[0003] In the production process of pet prescription food, the crushed raw materials generally need to be fermented or enzymatically hydrolyzed. Temperature control is crucial to the reaction efficiency of fermentation or enzymatic hydrolysis. However, existing technologies generally set heating devices or cooling devices outside the reaction kettle. For example, one kind of new multi-layer fermentation tank (application number 201821981148.8) discloses that it includes a cylindrical tank body, which is divided into an upper tank body, a middle tank body, and a lower tank body. A sandwich cavity is provided on the lower tank body, and a heating pipeline and a cooling pipeline are provided in the sandwich cavity. The heating pipeline and the cooling pipeline are spirally wound and distributed in the sandwich cavity and are respectively provided with corresponding circulating interfaces. Although the heating pipeline and the cooling pipeline can control the temperature of the raw materials in the tank body, the temperature exchange from the outside to the inside is slow and inefficient. Moreover, the temperature difference between the raw materials near the tank body and the raw materials in the center of the tank body is large, which is not conducive to production. SUMMARY

[0004] To solve the above technical problems, the present application provides a raw material production equipment for pet prescription food to meet the needs of actual production.

[0005] The technical solution of the present application is: a raw material production equipment for pet prescription food, comprising a reaction kettle, a first electric heating wire spirally wound on the outer wall of the reaction kettle, and a first cooling pipe spirally wound on the inner wall of the reaction kettle; a stirring shaft, a stirring paddle and a scraper made of heat-conducting material are provided in the middle part of the reaction kettle, the stirring shaft, the stirring paddle and the scraper are hollow and have a second electric heating wire and a second cooling pipe inside the inner wall, and the scraper is tightly attached to the inner wall of the reaction kettle.

[0006] Further, the inner wall of the reaction kettle is provided with a groove, the first cooling pipe is a semicircular pipe matched with the groove, the plane of the semicircular pipe is flush with the inner wall of the reaction kettle, and the semicircular pipe and the groove are welded without gaps.

[0007] Further, the top end of the stirring shaft is provided with a multi-pipe rotary joint, a water inlet pipe communicated with the water inlet end of the second cooling pipe and a water outlet pipe communicated with the water outlet end of the second cooling pipe are connected with an external water source and a water recycling system through the multi-pipe rotary joint.

[0008] Further, the upper end of the stirring shaft is provided with a first water distribution pipe and a first water return pipe, and the lower end of the stirring shaft is provided with a second water distribution pipe and a second water return pipe; one end of the first water distribution pipe and the first water return pipe are connected with the water inlet pipe and the water outlet pipe respectively; the other end of the first water distribution pipe is connected with a plurality of second cooling pipes, the plurality of second cooling pipes are arranged along the inside of the stirring shaft and the stirring paddle from top to bottom and connected with the second water return pipe, and the second water return pipe is communicated with the first water return pipe through a second middle pipe; the first water distribution pipe is communicated with the second water distribution pipe through a first middle pipe, one end of the plurality of second cooling pipes is communicated with the second water distribution pipe and arranged along the inside of the scraper, and the other end is communicated with the second water return pipe.

[0009] Further, the upper end of the stirring shaft is provided with a first water distribution pipe and a first water return pipe, and the lower end of the stirring shaft is provided with a second water distribution pipe and a second water return pipe; one end of the first water distribution pipe and the first water return pipe are connected with the water inlet pipe and the water outlet pipe respectively; the other end of the first water distribution pipe is connected with a plurality of second cooling pipes, the plurality of second cooling pipes are arranged along the inside of the stirring shaft and the stirring paddle from top to bottom and connected with the second water return pipe, and the second water return pipe is communicated with the first water return pipe through a second middle pipe; the first water distribution pipe is communicated with the second water distribution pipe through a first middle pipe, one end of the plurality of second cooling pipes is communicated with the second water distribution pipe and arranged along the inside of the scraper, and the other end is communicated with the second water return pipe.

[0010] Further, the bottom of the reaction kettle is provided with a ring-shaped ultrasonic generator, the top of the reaction kettle is provided with an exhaust port connected with an odor recognition system and an air inlet port connected with a sterile filter.

[0011] Further, it further comprises a multi-stage ultrafiltration membrane assembly and a collection tank connected in sequence with the discharge port of the reaction kettle, and the lower end of the reaction kettle is detachably provided with a sealed box body, and the separation mechanism is arranged in the inside of the box body.

[0012] Further, the multi-stage ultrafiltration membrane assembly comprises a plurality of ultrafiltration membranes communicated in series, and the plurality of ultrafiltration membranes are arranged in a circular shape; the ultrafiltrate outlet of each ultrafiltration membrane is communicated with a collection tank, each collection tank is communicated with an external detection device through a sampling pipe, and each collection tank is further provided with a discharge pipe penetrating the box body.

[0013] Further, the first ultrafiltration membrane in the multi-stage ultrafiltration membrane assembly is communicated with the discharge port of the reaction kettle through an elbow pipe, and the concentrated liquid outlet of the last ultrafiltration membrane is communicated with the reaction kettle; the horizontal end of the elbow pipe is provided with a filter screen, and a recovery pipe communicated with the reaction kettle is arranged in the elbow pipe between the filter screen and the reaction kettle.

[0014] Further, the detection device comprises a gel chromatography and detector combination device and an amino acid analyzer.

[0015] Compared with the prior art, the present application has the advantages that the electric heating wire and the cooling pipe are arranged outside and inside the reaction kettle, the inside and outside of the raw material can be heated or cooled at the same time, the production efficiency is improved, and the temperature difference between the inside and outside of the raw material is reduced, and the production quality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative effort based on these drawings belong to the protection scope of the present application.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0018] Figure 2 It is a schematic diagram of the structure of the stirring shaft, the stirring paddle and the scraper in the present application.

[0019] Figure 3 It is a partial expanded schematic diagram of the second electric heating wire and the second cooling pipe in the inner part of the stirring paddle in the present application.

[0020] In the drawings: 1, reaction kettle; 2, stirring shaft; 3, stirring paddle; 4, scraper; 5, first electric heating wire; 6, first cooling pipe; 7, heat preservation layer; 8, motor; 9, driving gear; 10, slip ring; 11, multi-pipe rotary joint; 12, feed inlet; 13, ultrasonic generator; 14, ultrafiltration membrane; 15, collection tank; 16, discharge pipe; 17, filter screen; 18, box body; 19, second electric heating wire; 20, second cooling pipe; 21, water inlet pipe; 22, water outlet pipe; 23, first middle pipe; 24, second middle pipe; 25, first branch water pipe; 26, second branch water pipe; 27, spiral belt. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be described clearly and completely. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0022] The specific embodiments of the present application will be described below in combination with the drawings:

[0023] As Figures 1-3As shown, a raw material production device for pet prescription food includes a reaction kettle 1, a first electric heating wire 5 is spirally wound on the outer wall of the reaction kettle 1, and a first cooling pipe 6 is spirally wound on the inner wall of the reaction kettle 1; wherein a high-temperature-resistant ceramic insulator is used to fix the first electric heating wire 5 on the outer wall of the reaction kettle 1, to ensure good contact between the first electric heating wire 5 and the outer wall of the reaction kettle 1, while avoiding the risk of short circuit and electric leakage, and the first electric heating wire 5 is connected with an external power supply. The spacing between adjacent first electric heating wires 5 is kept consistent to ensure uniform heating; at the same time, a heat preservation layer 7 is provided on the reaction kettle 1 to avoid the emission of heat inside the reaction kettle 1 and the influence of external heat on the inside; while the inner wall of the reaction kettle 1 is provided with a groove, the first cooling pipe 6 is a semicircular pipe that fits the groove, the plane of the semicircular pipe is flush with the inner wall of the reaction kettle 1, and the semicircular pipe is welded with the groove without gaps, so that the inner wall of the reaction kettle 1 is smooth and not easy to leave residual materials without affecting production, and the plane of the semicircular pipe increases the contact area with the raw materials, enhancing the cooling effect; and a cooling medium inlet is provided at the upper part of the reaction kettle 1, and an outlet is provided at the lower part, so that the cooling medium can flow from top to bottom, forming a good cooling circulation; valves are respectively installed at the cooling medium inlet and outlet for controlling the flow and flow rate of the cooling medium;

[0024] The middle part of the reaction kettle 1 is provided with a stirring shaft 2, stirring blades 3 and a scraper 4 made of heat-conducting material; the stirring blades 3 are uniformly distributed on the stirring shaft 2, and the scraper 4 is fixed at the bottom end of the stirring shaft 2, which are all prior art and will not be described here; the stirring shaft 2, stirring blades 3 and scraper 4 are hollow and provided with a second electric heating wire 19 and a second cooling pipe 20 close to the inner wall, i.e. the interiors of the stirring shaft 2, stirring blades 3 and scraper 4 are interconnected, and the second electric heating wire 19 and the second cooling pipe 20 are arranged to heat or cool the interior of the reaction kettle 1, improve production efficiency and avoid large temperature difference between the inside and outside of the raw materials; moreover, the scraper 4 is close to the inner wall of the reaction kettle 1, which can not only scrape the excess material on the inner wall of the reaction kettle 1, but also communicate with the inner wall of the reaction kettle 1, so that the inner wall of the reaction kettle 1 and the scraper 4, stirring shaft 2 and stirring blades 3 can transmit energy to each other, so that the temperature of the inner wall of the reaction kettle 1, scraper 4, stirring shaft 2 and stirring blades 3 is consistent, which can avoid the large temperature difference between the inside and outside of the raw materials and affect the production quality and efficiency; in this way, the production temperature in the reaction kettle 1 can be quickly and accurately controlled; better still, the stirring shaft 2 is provided with a spiral belt 27, which can be connected to the stirring shaft 2 by a connecting piece, and the spiral belt 27 and the stirring shaft 2 form a certain angle, usually an inclined installation, which are all prior art and will not be described here; moreover, the spiral belt 27 does not contact the stirring blades 3; so that the material in the reaction kettle can be fully circulated in the axial and radial directions, improving the mixing efficiency; the spiral belt 27 generates axial flow, and the stirring blades 3 generate radial flow, which complement each other, so that the material is fully stirred in all directions; the left-right symmetrical design of the stirring blades 3 can ensure uniform mixing of the material in the horizontal direction, reduce local dead angles and improve fermentation efficiency.

[0025] Specifically, the top end of the stirring shaft 2 is provided with a multi-pipe rotary joint 11, the water inlet pipe 21 communicated with the water inlet end of the second cooling pipe 20 and the water outlet pipe 22 communicated with the water outlet end of the second cooling pipe 20 are connected with the external water source and the water recycling system through the multi-pipe rotary joint 11 respectively, avoiding the winding of the water outlet pipe 22 and the water inlet pipe 21 due to the rotation of the stirring shaft 2; further, the upper end of the inside of the stirring shaft 2 is provided with a first water distribution pipe 25 and a first water return pipe, and the lower end of the inside of the stirring shaft 2 is provided with a second water distribution pipe 26 and a second water return pipe; one end of the first water distribution pipe 25 and the first water return pipe is connected with the water inlet pipe 21 and the water outlet pipe 22 respectively; the other end of the first water distribution pipe 25 is connected with a plurality of second cooling pipes 20, and the plurality of second cooling pipes 20 are arranged from top to bottom along the inside of the stirring shaft 2 and the stirring paddle 3 and connected with the second water return pipe, and the second water return pipe is communicated with the first water return pipe through the second middle pipe 24; the first water distribution pipe 25 is communicated with the second water distribution pipe 26 through the first middle pipe 23, and one end of the plurality of second cooling pipes 20 is communicated with the second water distribution pipe 26 and arranged along the inside of the scraper 4, and the other end is communicated with the second water return pipe; the first middle pipe 23 does not contact with the inner wall of the stirring shaft 2, so that the external water directly exchanges heat with the raw materials close to the scraper 4, which is equivalent to the cooling effect on the stirring paddle 3, avoiding the influence on the heat exchange effect of the raw materials after the external water exchanges heat on the stirring paddle 3 and then exchanges heat with the raw materials on the scraper 4, improving the overall cooling effect of the raw materials and avoiding temperature difference; and the water inlet pipe 21 is communicated with a plurality of second cooling pipes 20 through the first water distribution pipe 25, which improves the cooling effect of the plurality of second cooling pipes 20 while avoiding the increase of cost and the complexity of structure caused by directly connecting the plurality of second cooling pipes 20 with the multi-pipe rotary joint 11; the second water return pipe is communicated with the first water return pipe through the second middle pipe 24, and the second middle pipe 24 does not contact with the inner wall of the stirring shaft 2, avoiding the influence on the cooling effect of the raw materials by the water after heat exchange and temperature rise. The stirring shaft 2, the stirring paddle 3, the scraper 4, the first cooling pipe 6 and the second cooling pipe 20 are all made of stainless steel with good heat conduction. Moreover, the water inlet end and the water outlet end of the first cooling pipe 6 are connected with the external water source and the water recycling system respectively.

[0026] Specifically, the upper end of the stirring shaft 2 is provided with a slip ring 10, one end of the second electric heating wire 19 passes through the stirring shaft 2 and is connected with the slip ring 10, the slip ring 10 is in contact with the electric brush, and the electric brush is connected with the external power source; the electric brush is installed on the inner top support of the reaction kettle 1, and a spring or the like is further provided to give the electric brush a proper pressure to ensure good electrical contact with the slip ring 10, and the electric brush is connected to the external power source through a wire, which is all prior art and will not be described here; moreover, the top of the reaction kettle 1 is provided with a maintenance opening and a matching maintenance door for convenient replacement of the electric brush; and the second electric heating wire 19 is arranged from top to bottom along the inside of the stirring shaft 2, the stirring paddle 3 and the scraper 4, specifically as shown in Figure 3As shown, in the stirring paddle 3 and the scraper 4, a second electric heating wire 19 is arranged between two adjacent second cooling pipes 20, and a second electric heating wire 19 is also arranged between the back and forth pipelines of a second cooling pipe 20; such arrangement makes the second cooling pipe 20 and the second electric heating wire 19 arranged separately, improving the uniformity of heating or cooling.

[0027] Better still, the bottom of the reaction kettle 1 is provided with a ring-shaped ultrasonic generator 13; the ultrasonic generator 13 is designed in a ring shape, with multiple ultrasonic transducer units evenly distributed on the ring, and the size of the ring is customized according to the circular arc shape of the bottom of the reaction kettle 1 to ensure good fit with the bottom of the reaction kettle 1; the ultrasonic generator 13 acts on the materials in the reaction vessel through cavitation effect or air transmission, enhancing the reaction effect and improving the reaction efficiency; the top of the reaction kettle 1 is provided with an exhaust port connected to an odor recognition system and an air inlet connected to a sterile filter; specifically, the odor recognition system can be an electronic nose, which is usually installed near the reaction kettle 1 at an appropriate position to ensure that the gas sampling pipeline can be conveniently connected to the exhaust port of the reaction kettle 1, and a dedicated sampling pipeline is used to connect the air inlet of the electronic nose to the exhaust port of the reaction kettle 1; the sampling pipeline should be as short as possible and have good sealing performance to reduce the loss and pollution of the gas during transmission; the power cord of the electronic nose is connected to a stable power socket, and the data line is connected to a control system or a computer for real-time monitoring and recording of odor data; real-time monitoring of the odor generated during fermentation can timely detect abnormal odor and judge whether the fermentation process is normal and the product quality meets the standard; the oxygen, carbon dioxide and ammonia in the fermentation tail gas can be predicted to indirectly reflect the concentration and metabolic state of related substances in the fermentation broth; optimization of fermentation process parameters through odor analysis can improve fermentation efficiency and product quality; avoiding the subjectivity of manual sensory evaluation, providing objective and quantitative odor analysis data; rapid detection and real-time feedback can shorten the detection time and improve production efficiency. The air inlet is provided with a sterile filter to remove bacteria, viruses and other microorganisms in the air, ensuring that the gas entering the reaction kettle 1 is sterile and preventing microbial contamination of the raw materials, thereby ensuring product quality and stability, which is particularly important for the production of special nutritional food for pets in pathological state; filtering out dust, particles and other impurities in the air can prevent impurities from entering the reaction kettle 1 and affecting the purity of the raw materials and the reaction process, which helps to improve the nutritional value and functionality of the product; when filtering the gas, water and other harmful substances can be efficiently separated to ensure that the gas entering the reaction kettle 1 is dry and clean, which is conducive to preventing the raw materials from getting wet and microbial growth; while filtering, the pressure balance of the equipment and production environment is maintained to ensure the continuity and stability of production, so that the enzymatic hydrolysis and fermentation processes can proceed smoothly.

[0028] Also included is a multi-stage ultrafiltration membrane assembly and a collection tank 15 connected in turn with the discharge port of the reaction kettle 1, specifically, the multi-stage ultrafiltration membrane assembly includes a plurality of ultrafiltration membranes 14 connected in series in turn, that is, the concentrated liquid outlet of the previous ultrafiltration membrane 14 is connected in communication with the liquid inlet of the next ultrafiltration membrane 14 through a pipeline, the pipeline is provided with a pump and an electromagnetic valve, and the pump can be a peristaltic pump; and the series connection of the ultrafiltration membranes 14 requires that they are arranged in order of molecular weight from small to large, such as material molecular weight of 500-1000, 1000-2000, 2000-4000, 4000-5000, 5000-10000, etc.; the first ultrafiltration membrane 14 directly connected with the reaction kettle 1 is a primary ultrafiltration membrane 14, which retains substances with a molecular weight greater than 1000, and the ultrafiltrate is a substance with a molecular weight of 500-1000; the secondary ultrafiltration membrane 14 retains substances with a molecular weight greater than 2000, and the ultrafiltrate is a substance with a molecular weight of 1000-2000; the tertiary ultrafiltration membrane 14 retains substances with a molecular weight greater than 4000, and the ultrafiltrate is a substance with a molecular weight of 2000-4000; the fourth ultrafiltration membrane 14 retains substances with a molecular weight greater than 5000, and the ultrafiltrate is a substance with a molecular weight of 4000-5000; the fifth ultrafiltration membrane 14 retains substances with a molecular weight greater than 10000, and the ultrafiltrate is a substance with a molecular weight of 5000-10000; finally, the fifth ultrafiltration membrane 14 retains substances with a molecular weight greater than 10000, which are recycled into the reaction kettle 1; in this way, different molecular weight substances in the mixture can be effectively separated, each stage of ultrafiltration membrane 14 only processes a specific range of substances, improving the filtration efficiency; filtering small molecules first can reduce the impact of large molecules on small molecule filtration, reduce the risk of membrane contamination, and prolong the service life of the membrane; and the separation process of each molecular weight substance can be more accurately controlled, reducing cross-contamination between different molecular weight substances and improving the purity of the final product; and the plurality of ultrafiltration membranes 14 are arranged in a circular shape, making efficient use of space. The lower end of the reaction kettle 1 is detachably provided with a sealed box body 18, which can be connected by flanges, and the box body 18 is provided with a maintenance door for easy maintenance; the box body 18 is provided with a heat preservation layer 7, and the separation mechanism is installed inside the box body 18; not only is the overall equipment compact in structure, but the sealed box body 18 can effectively block dust, microorganisms and other impurities, preventing them from adhering to the membrane surface or entering the membrane holes, reducing the risk of contamination and prolonging the service life of the membrane.

[0029] More preferably, the ultrafiltrate outlet of each ultrafiltration membrane 14 is in communication with a collection tank 15, each collection tank 15 is in communication with external detection equipment through a sampling tube, and each collection tank 15 is also provided with a discharge pipeline 16 penetrating the tank body 18, and the sampling tube and the discharge pipeline 16 are both provided with solenoid valves; the ultrafiltrate outlet of each ultrafiltration membrane 14 is in communication with an independent collection tank 15, ensuring that substances of different molecular weight ranges are collected separately, avoiding mixing between substances of different molecular weights, and facilitating subsequent analysis and processing; the external detection equipment can conveniently take corresponding molecular weight substances from the collection tank 15 for detection, the detection equipment in the present application includes gel chromatography and detector combination equipment, an amino acid analyzer; through gel chromatography detection, it can be verified whether the target molecular weight range of substances is successfully separated by the ultrafiltration system. For example, it can be confirmed whether the raw materials after the ultrafiltration membrane 14 are completely in the specified molecular weight range of 500-1000, 1000-2000, etc., to ensure the efficiency and accuracy of the ultrafiltration process; through gel chromatography, it can be evaluated whether the molecular weight distribution of the functional peptide meets the design requirements, such as whether it has the molecular weight range of anti-oxidation, antibiosis or immune function enhancement; in pet prescription food, the molecular weight distribution of functional peptides needs to be strictly controlled to ensure their absorption effect and functional role in pets. Gel chromatography and detector combination equipment can be used as a key tool for quality control to ensure the consistency and stability of each batch of products. The amino acid analyzer can accurately determine the amino acid composition and content of proteins or polypeptides, helping to understand the amino acid sequence of functional peptides. This is crucial for evaluating their biological activity and nutritional value; in pet prescription food, the balance of amino acids is the key to meeting the special nutritional needs of pets. Through the amino acid analyzer, it can be ensured that the amino acid composition in the raw materials meets the requirements of pets in a specific physiological or pathological state; during production, the amino acid analyzer can be used to detect the amino acid composition of each batch of raw materials to ensure their consistency and compliance with quality standards; by analyzing the amino acid composition, it can be detected whether there are impurities or undesirable ingredients in the raw materials, thereby ensuring product quality and safety; certain amino acids play a key role in the physiological functions of pets such as immunity and antioxidant. Through the amino acid analyzer, the content of key amino acids in functional peptides can be evaluated to ensure that they have the expected functional properties. The combination of gel chromatography and detector combination equipment and the amino acid analyzer can comprehensively evaluate the quality and functionality of raw materials from two key aspects of molecular weight and amino acid composition, ensuring the high quality and consistency of pet prescription food; through precise molecular weight and amino acid analysis, production processes can be adjusted in a timely manner, operation conditions can be optimized, and production efficiency and product quality can be improved; these analysis equipment can ensure that the produced raw materials meet the nutritional needs of pets in a specific physiological and pathological state, providing scientific support for the health of pets.

[0030] More preferably, the first ultrafiltration membrane 14 in the multi-stage ultrafiltration membrane assembly is communicated with the discharge port of the reaction kettle 1 through a bend pipe, both ends of the bend pipe are provided with electromagnetic valves, the bend pipe can avoid the material discharged from the reaction kettle 1 directly impacting the ultrafiltration membrane 14 to damage it, and can change the discharge path of the reaction kettle 1; the concentrated liquid outlet of the last ultrafiltration membrane 14 is communicated with the reaction kettle 1 to recover the concentrated liquid; the horizontal end of the bend pipe is provided with a filter screen 17, a recovery pipe communicated with the reaction kettle 1 is arranged in the bend pipe between the filter screen 17 and the reaction kettle 1, the recovery pipe is provided with an electromagnetic valve, and the filtered material and the recovered filter residue are filtered; the concentrated liquid and the filter residue may contain unconverted raw materials or intermediates. Re-enzymolysis or fermentation in the reaction kettle 1 can further convert the unconverted raw materials or intermediates into target products, improve the utilization rate of raw materials, and reduce waste; the filter residue may contain macromolecular substances or particles, and if not recovered and treated, these substances may form a pollution layer on the surface of the ultrafiltration membrane 14, accelerating the clogging and damage of the membrane assembly. Re-treatment in the reaction kettle 1 can reduce the pollution of the membrane assembly and prolong its service life.

[0031] Moreover, the reaction kettle 1 is also provided with a temperature sensor, a pH sensor and a dissolved oxygen sensor, which are connected to a control system such as a PLC, etc., for real-time monitoring of parameters in the fermentation process; a gas flow meter and a pressure sensor are arranged on the pipelines of the gas inlet and the gas outlet of the reaction kettle 1 and are connected to the control system for monitoring and controlling the gas flow and pressure; the top of the reaction kettle 1 is provided with a feed inlet 12 and an adding port; a motor 8 is arranged on the top of the reaction kettle 1, the motor 8 is a servo motor capable of forward and reverse rotation for driving the stirring shaft 2, the motor 8 is connected to the driven gear of the stirring shaft 2 through the arrangement of a driving gear 9, etc.; the electromagnetic valve, the motor 8 and the peristaltic pump are connected to the control system; the above are all prior art, and the connection structure, operation principle, etc. will not be described here.

[0032] Working principle:

[0033] In the fermentation process, raw materials are added into the reaction kettle 1 from the feed inlet 12, fermentation strains are added from the adding port, the motor 8 is started, the stirring shaft 2, the stirring paddle 3 and the scraper 4 are rotated, the raw materials and the fermentation strains are fully mixed, the temperature, pH value, dissolved oxygen concentration and gas flow of the fermentation liquid are monitored in real time through the sensors, the change of the smell of the fermentation gas is monitored by using the electronic nose, the fermentation parameters are adjusted in time according to the monitoring data, for example, the electric heating wire is started or stopped for heating or the cooling pipe is used for cooling when the temperature fluctuates, the aeration amount and the stirring speed are changed according to the dissolved oxygen concentration per unit time;

[0034] Enzymatic hydrolysis process, the raw materials are added from the feed inlet 12 into the reaction kettle 1, the enzyme preparation is added from the addition port, the motor 8 is started to make the stirring shaft 2, the stirring paddle 3 and the scraper 4 rotate, so that the raw materials and the enzyme preparation are fully mixed, the temperature, pH value and other parameters of the enzymatic hydrolysate are monitored in real time through temperature sensor, pH sensor and other devices, and the reaction conditions are adjusted in time according to the monitoring results, such as heating through electric heating wire or cooling through cooling pipe to maintain stable temperature, adjusting pH value by adding acid or alkali solution, to ensure that the enzymatic reaction is carried out under the best conditions;

[0035] After the fermentation or enzymatic hydrolysis is completed, the material is filtered through the filter screen 17 and then enters the multi-stage ultrafiltration membrane assembly, the ultrafiltrate of each stage is collected into the corresponding collection tank 15, the gel chromatography and detector combination device and the amino acid analyzer can take samples from the collection tank 15 for detection and analysis, and finally the material in the collection tank 15 is transported from the corresponding discharge pipeline 16 to the next process for production.

[0036] In addition, the reaction kettle of the present application and the conventional reaction kettle with only heating device and cooling device arranged outside are selected for testing, specifically as follows:

[0037] I. Experimental equipment and method

[0038] 1. Experimental equipment:

[0039] The device of the present application: the raw material production equipment for pet prescription food manufactured according to the design of the present application, including a reaction kettle, a stirring shaft, a stirring paddle, a scraper and related heating and cooling devices.

[0040] Conventional reaction kettle: select a common reaction kettle with only heating device or cooling device arranged outside in the market, such as the reaction kettle with the manufacturer IKA and the equipment model IKA C 400, which has obvious difference in structure and working principle from the device of the present application.

[0041] 2. Experimental method:

[0042] Temperature control efficiency experiment: record the heating and cooling time of the device of the present application and the conventional reaction kettle at three temperature ranges of normal temperature-50℃, 50-100℃ and 100-120℃, respectively.

[0043] Temperature uniformity experiment: set temperature sensors at multiple positions inside the equipment to measure and record the temperature distribution at each temperature range.

[0044] Fermentation / enzymatic hydrolysis reaction efficiency experiment: under the same raw materials, strains or enzyme preparations and process conditions, compare the product conversion rate and reaction time of the two devices.

[0045] II. Experimental results and analysis

[0046] (1) Temperature control efficiency comparison

[0047] 1. Heating efficiency comparison

[0048] Device type Initial temperature (°C) Target temperature (°C) Time to reach set temperature (min) Inventive device 25 50 8 Conventional reactor 25 50 22 Inventive device 50 100 15 Conventional reactor 50 100 40 Inventive device 100 120 12 Conventional reactor 100 120 35

[0049] 2. Cooling efficiency comparison

[0050]

[0051]

[0052] Analysis: The heating and cooling time of the device of the present application at each temperature stage is significantly shorter than that of the conventional reaction kettle, and is strictly controlled within a temperature range of ±0.5°C, and the heating and cooling time is controlled within 15 minutes. In the heating process from normal temperature to -50°C, the device of the present application takes 8 minutes, which is only about 1 / 3 of the conventional device; in the heating process from 50-100°C and 100-120°C, the time taken is 15 minutes and 12 minutes respectively, and the efficiency is improved obviously. The cooling process also shows excellent performance, such as cooling from 50°C to normal temperature only takes 10 minutes, while the conventional device takes 35 minutes. After optimization, it only takes 15 minutes to reduce from 100°C to 50°C, and only 14 minutes to reduce from 120°C to 100°C. This shows that the internal and external heating and cooling system of the device of the present application greatly improves the temperature control efficiency and significantly improves the production efficiency.

[0053] (II) Temperature uniformity comparison

[0054] 1. Temperature uniformity in the heating process from normal temperature to -50°C

[0055] Measurement position Inventive device temperature (°C) Conventional reactor temperature (°C) Top of reactor inner wall 49.8 52.3 Middle of reactor inner wall 50.1 48.7 Bottom of reactor inner wall 49.7 47.1 Top of reactor center 50.2 45.6 Middle of reactor center 49.9 46.8 Bottom of reactor center 50.0 44.3

[0056] 2. Temperature uniformity in the heating process from 50-100°C

[0057]

[0058]

[0059] 3. Temperature uniformity in the heating process from 100-120°C

[0060] Measurement position Inventive device temperature (°C) Conventional reactor temperature (°C) Top of reactor inner wall 119.8 123.5 Middle of reactor inner wall 120.1 118.7 Bottom of reactor inner wall 119.7 116.3 Top of reactor center 120.2 114.8 Middle of reactor center 119.9 116.2 Bottom of reactor center 120.0 113.7

[0061] Analysis: The temperature uniformity of the device in each heating process is significantly better than that of the traditional reaction kettle. In the normal temperature-50℃ section, the internal temperature difference of the device is controlled within ±0.5℃, while the temperature difference between the inner wall and the center of the traditional device is more than 7℃; in the 50-100℃ and 100-120℃ sections, the temperature difference is also kept in a very small range, and the traditional device has a significant temperature gradient. This shows that the device effectively reduces the temperature difference between the inside and outside of the raw materials through the synergistic effect of the inner and outer heating wires and the cooling pipe, ensures the consistency of the reaction conditions, and thus improves the production quality.

[0062] (Three) Comparison of fermentation / enzymatic reaction efficiency

[0063] 1. Fermentation experiment

[0064] Device type Product conversion rate (%) Fermentation time (h) Inventive device 92.4 36 Conventional reactor 83.6 48

[0065] 2. Enzymatic hydrolysis experiment

[0066] Device type Product conversion rate (%) Enzymatic hydrolysis time (h) Inventive device 90.8 24 Conventional reactor 78.3 32

[0067] Analysis: In the fermentation experiment, the product conversion rate of the device is as high as 92.4%, which is 8.8 percentage points higher than that of the traditional reaction kettle (83.6%); the fermentation time is also shortened from 48 hours of the traditional reaction kettle to 36 hours. In the enzymatic hydrolysis experiment, the product conversion rate of the device is 90.8%, and that of the traditional reaction kettle is 78.3%, which is 12.5 percentage points higher; the enzymatic hydrolysis time is shortened from 32 hours of the traditional reaction kettle to 24 hours. This shows that the device can provide more ideal conditions for fermentation and enzymatic hydrolysis reactions due to more efficient and uniform temperature control, thereby significantly improving the product conversion rate and shortening the reaction time, further proving its advantages in improving production quality.

[0068] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "upper", "lower", "left", "right", "front", "back", and similar terms as used herein are for the purpose of description only.

[0069] The above description is only a preferred embodiment of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application, and any person skilled in the art can make some changes or modifications to the above disclosed technical content to make equivalent embodiments with equivalent changes, as long as they do not deviate from the technical solution of the present application. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application are still within the scope of the technical solution of the present application.

Claims

1. A raw material production device for pet prescription food, comprising a reactor (1), characterized in that: A first electric heating wire (5) is spirally wound on the outer wall of the reactor (1), and a first cooling tube (6) is spirally wound on the inner wall of the reactor (1); a stirring shaft (2), a stirring paddle (3) and a scraper (4) made of a heat-conducting material are provided in the middle of the reactor (1); the stirring shaft (2), the stirring paddle (3) and the scraper (4) are hollow and a second electric heating wire (19) and a second cooling tube (20) are provided inside the stirring shaft (2), which are in close contact with the inner wall; the scraper (4) is in close contact with the inner wall of the reactor (1).

2. The raw material production equipment for pet prescription food according to claim 1, characterized in that: The inner wall of the reactor (1) is provided with a groove, and the first cooling pipe (6) is a semicircular pipe fitted with the groove. The plane of the semicircular pipe is flush with the inner wall of the reactor (1), and the semicircular pipe and the groove are welded seamlessly.

3. The raw material production equipment for pet prescription food according to claim 1, characterized in that: A multi-pipe rotary joint (11) is installed at the top end of the stirring shaft (2), and a water inlet pipe (21) connected to the water inlet end of the second cooling pipe (20) and a water outlet pipe (22) connected to the water outlet end of the second cooling pipe (20) are respectively connected to an external water source and a water recovery system through the multi-pipe rotary joint (11).

4. The raw material production equipment for pet prescription food according to claim 3, characterized in that: The upper end of the interior of the stirring shaft (2) is provided with a first water distribution pipe (25) and a first water return pipe, and the lower end of the interior of the stirring shaft (2) is provided with a second water distribution pipe (26) and a second water return pipe; one end of the first water distribution pipe (25) and the first water return pipe are respectively connected to the water inlet pipe (21) and the water outlet pipe (22); the other end of the first water distribution pipe (25) is connected to a plurality of second cooling pipes (20), and the plurality of second cooling pipes (20) are arranged from top to bottom along the interior of the stirring shaft (2) and the stirring paddle (3) and are connected to the second water return pipe, and the second water return pipe is connected to the first water return pipe through the second middle pipe (24); the first water distribution pipe (25) is connected to the second water distribution pipe (26) through the first middle pipe (23), and one end of the plurality of second cooling pipes (20) is connected to the second water distribution pipe (26) and is arranged along the interior of the scraper (4) and the other end is connected to the second water return pipe.

5. The raw material production equipment for pet prescription food according to claim 1, characterized in that: The upper end of the stirring shaft (2) is fixedly sleeved with a slip ring (10), one end of a second electric heating wire (19) passes through the stirring shaft (2) and is connected to the slip ring (10), the slip ring (10) contacts an electric brush, and the electric brush is connected to an external power supply; the second electric heating wire (19) is arranged from top to bottom along the inside of the stirring shaft (2), the stirring paddle (3), and the scraper (4).

6. The raw material production equipment for pet prescription food according to claim 1, characterized in that: A ring-shaped ultrasonic generator (13) is installed on the bottom of the reactor (1); an exhaust port connected to the odor recognition system and an air inlet connected to the sterile filter are installed on the top of the reactor (1).

7. The raw material production equipment for pet prescription food according to claim 1, characterized in that: The invention also comprises a multi-stage ultrafiltration membrane (14) assembly and a collection tank (15) connected in sequence to the discharge port of the reactor (1); a sealed box (18) is detachably mounted on the lower end of the reactor (1); and a separation mechanism is mounted inside the box (18).

8. The raw material production equipment for pet prescription food according to claim 7, characterized in that: The multi-stage ultrafiltration membrane (14) assembly comprises a plurality of ultrafiltration membranes (14) connected in series, and the plurality of ultrafiltration membranes (14) form a circle; the ultrafiltrate outlet of each ultrafiltration membrane (14) is connected to a collection tank (15), each collection tank (15) is connected to an external detection device through a sampling tube, and each collection tank (15) is also provided with a discharge pipe (16) running through the box (18).

9. The raw material production equipment for pet prescription food according to claim 8, characterized in that: The first ultrafiltration membrane (14) in the multi-stage ultrafiltration membrane (14) assembly is connected to the discharge port of the reactor (1) through a curved pipe, and the concentrated liquid outlet of the last ultrafiltration membrane (14) is connected to the reactor (1); a filter screen (17) is provided at the horizontal end of the curved pipe, and a recovery pipe connected to the reactor (1) is provided in the curved pipe between the filter screen (17) and the reactor (1).

10. The raw material production equipment for pet prescription food according to claim 8, characterized in that: The detection equipment includes gel chromatography and detector combined equipment and amino acid analyzer.

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