Dehydration separation equipment and processing method of instant fish maw

Abstract

The invention discloses a dehydration separation device and a processing method of instant fish maw, and belongs to the technical field of dehydration and separation, the dehydration separation device comprises: a rotary drum which is a cylindrical metal shell, has a smooth inner wall, and is provided with a feed port and a discharge port at two end parts respectively; the spiral pusher is mounted in the rotary drum; the first motor is connected with a main shaft of the rotary drum through a rigid coupling; the second motor is connected with a transmission shaft of the spiral pusher through a differential mechanism; and the torque sensor is mounted on a transmission shaft of the spiral pusher and is used for monitoring the torque change of the spiral pusher during operation in real time. By adjusting the rotating speed difference and forward and reverse rotation between the spiral pusher and the rotating drum, the second motor and the differential mechanism, the rotating drum and the spiral pusher can achieve forward and reverse rotation switching, namely positive and negative differential ratio switching, fish maw automatically reciprocates in the rotating drum, non-uniform retention time caused by one-way conveying is avoided, and the fish maw conveying efficiency is improved. And the drying uniformity is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of dehydration and separation, and particularly to a dehydration and separation device and processing method for instant fish maw. Background Art

[0002] In the field of dehydrating instant fish maw, a hot air device or an oven device is usually used to dry the fish maw, that is, heat is supplied below a flowing conveyor belt or the fish maw is dried by hot air blowing. The continuous heat causes the materials on the conveyor belt to be naturally dehydrated and dried. Since the instant fish maw is laid flat on the conveyor belt, such a method has uneven heating during hot air drying. High-protein foods such as fish maw are prone to adhesion due to protein denaturation during the drying process. The single-directional pushing mechanism of traditional equipment cannot effectively break up the lumps, resulting in local overheating and charring, which affects the taste and safety of the product. Summary of the Invention

[0003] The purpose of the present invention is to provide a dehydration device and processing method for instant fish maw to solve one or more technical problems existing in the prior art, and at least provide a beneficial choice or create conditions.

[0004] To solve the above technical problems, the technical solutions adopted by the present invention are as follows: First of all, the present invention provides a dehydration and separation device for instant fish maw, including: A rotating drum, which is a cylindrical metal shell with a smooth inner wall, and a feeding port and a discharging port are respectively arranged at both ends; A spiral pusher, including a spiral shaft and spiral blades arranged on the spiral shaft. The spiral pusher is installed inside the rotating drum. The spiral shaft is coaxially arranged with the main shaft of the rotating drum, and there is a gap between the spiral blades and the inner wall of the rotating drum; A first motor, which is connected to the main shaft of the rotating drum through a rigid coupling; A second motor, which is connected to the transmission shaft of the spiral pusher through a differential, and is used to adjust the rotational speed difference between the spiral pusher and the rotating drum and their forward and reverse rotations relative to each other; A torque sensor, which is installed on the transmission shaft of the spiral pusher to monitor the torque change during the operation of the spiral pusher in real time; A hot air circulation device, which has a first hot air pipeline and a second hot air pipeline. The first hot air pipeline and the second hot air pipeline are respectively connected to both ends of the rotating drum to form a directional hot air flow between the rotating drum and the hot air circulation device. Temperature sensors are respectively arranged on the first hot air pipeline and the second hot air pipeline.

[0005] Compared with the traditional one, the dehydration and separation equipment provided by the present invention adjusts the speed difference between the spiral pusher and the drum and the forward and reverse rotation between them through the second motor and the differential. The second motor and the differential enable the drum and the spiral pusher to switch between forward and reverse rotation, that is, switching between positive and negative differential ratios, so that the fish maw automatically reciprocates in the drum, avoiding uneven residence time caused by one-way transportation and improving drying uniformity.

[0006] The rotating drum and spiral pusher provided by the present invention construct a double flipping mechanism by adopting a differential. The first motor is connected to the main shaft of the rotating drum through a rigid coupling, so that the fish maw rolls in the rotating drum. The second motor is connected to the transmission shaft of the spiral pusher through a differential, and rotates at a speed lower than that of the rotating drum to realize the pushing and flipping of the fish maw. The planetary gear differential is adopted to adjust the speed ratio between the rotating drum and the spiral pusher, ensuring the coordination of the relative movement of the spiral pusher and the rotating drum, avoiding extrusion, promoting hot air penetration, and reducing damage to the fish maw.

[0007] The torque sensor provided by this invention monitors the pushing resistance in real time (reflecting changes in the amount and moisture content of the fish maw) and adjusts the output of the second motor to ensure a stable differential ratio. When the moisture content and viscosity of the fish maw are high, the torque increases, increasing the speed of the second motor and preventing the pusher from stalling due to resistance. Compared to traditional independent control, which requires manual preset speed parameters, this system cannot cope with real-time load changes and may cause the drum to idle, the pusher to jam, push the material too quickly, and damage the fish maw. Dynamic adjustment of the speed of the drum and spiral pusher based on the moisture content of the fish maw effectively improves dehydration uniformity.

[0008] As an extension of the above scheme, the differential is a planetary gear differential, including a sun gear, planetary gears, a ring gear and a planetary carrier. The planetary gears are located between the sun gear and the ring gear and are connected to the planetary carrier. The first motor is connected to the sun gear in a transmission manner. The second motor inputs power through the ring gear. The planetary carrier is connected to the screw pusher in a transmission manner.

[0009] This extended solution is connected to the rotating drum and spiral pusher through a planetary gear differential. The first motor drives the sun gear, the second motor drives the ring gear, and the planetary carrier outputs to the spiral pusher, forming a dual-input and single-output differential transmission chain. When the second motor rotates in the opposite direction, it outputs a negative differential ratio (the spiral pusher and the rotating drum are in opposite directions), realizing bidirectional movement of the spiral pusher.

[0010] As an extension of the above solution, infrared sensors are respectively provided at the inlet and outlet of the rotating drum to monitor the position of the fish maw in real time during the dehydration stage; When the infrared sensor at the discharge port detects the fish maw, the second motor switches the rotation direction between the screw pusher and the drum, so that the drum rotates in the opposite direction to the screw pusher, switches the differential ratio to a negative value, and starts reverse pushing; When the infrared sensor at the feeding port detects fish maw, the rotation direction between the screw feeder and the rotating drum is switched through the second motor, so that the rotating drum rotates in the same direction as the screw feeder, the switching differential ratio is positive, and forward feeding is restored to form a closed-loop reciprocation.

[0011] This extended solution monitors the position of fish maw at the feeding port and the discharging port of the rotating drum through an infrared sensor, triggers reverse feeding in advance, avoids the accumulation of fish maw at the end of the rotating drum, and the sudden increase in the resistance of the screw feeder. Compared with the passive response of the torque sensor, it can reduce the overload impact. The traditional mechanical limit switch needs to be triggered when the fish maw touches it, which is easy to cause too thick accumulation at the end.

[0012] As an extension of the above solution, the hot air circulation device includes: A hot air generator for providing hot air; A circulating fan blows the hot air to one end of the rotating drum through the first hot air pipeline. The hot air flows through the tumbling fish maw, takes away moisture when contacting the surface of the fish maw, and the hot air flows out from the other end of the rotating drum and returns to the hot air circulation device through the second hot air pipeline to form a directional hot air flow. A moisture absorption filter layer is arranged at the connection of the second hot air pipeline and the hot air circulation device.

[0013] In this extended solution, the fish maw reciprocates in the rotating drum and contacts the hot air multiple times, reducing the moisture content deviation and greatly improving the product quality consistency. At the same time, hot air at 40 - 65 °C is introduced into the rotating drum to make the hot air evenly distributed and penetrate the tumbling fish maw, effectively shortening the drying time and improving the production efficiency. The moisture absorption filter layer is used to absorb the moisture carried out by the hot air in the second hot air pipeline to ensure the drying of the hot air in the next cycle.

[0014] As an extension of the above solution, the temperature sensor includes a first temperature sensor arranged in the first hot air pipeline and a second temperature sensor arranged in the second hot air pipeline, which are used to obtain the first hot air temperature and the second hot air temperature at both ends of the rotating drum; When the temperature difference value between the first hot air temperature and the second hot air temperature is greater than a pre-set temperature difference threshold, control the hot air generator to increase the power to increase the hot air temperature and / or control the circulating fan to increase the hot air volume.

[0015] This extended solution is based on controlling the hot air temperature and hot air volume by temperature difference to solve the problem of uneven temperature distribution in traditional hot air drying. In traditional equipment, hot air enters from one end of the rotating drum. Due to factors such as material blockage and air flow attenuation, the temperature at the inlet end is high (up to 70°C), and the temperature at the outlet end is low (as low as 40°C), with a temperature difference exceeding 20°C, resulting in uneven drying of the material. This extended solution automatically controls the hot air generator to increase power according to the temperature difference value to increase the hot air temperature and / or controls the circulation fan to increase the hot air volume, reducing the moisture content deviation of the fish maw.

[0016] Secondly, the present invention provides a processing method for instant fish maw, and the processing method includes the following steps: Step 1: Pretreat the dried tubular fish maw, and the pretreatment includes thawing, rinsing the surface and inner wall, and cutting into pieces or slices. Step 2: Feed the cut fish maw into an immersion pool composed of multiple stages in series, and purify the water body in real time through a water circulation filtration pipeline to keep the water temperature at 20 - 25°C. After the immersion is completed, the fish maw is lifted from the immersion pool by a mesh belt conveyor. During the transmission process, the fish maw is rinsed by setting high-pressure spray nozzles to remove the residual immersion liquid on the surface. Step 3: The fish maw enters a dehydration and separation device for instant fish maw as described in the above technical solution, and is dehydrated with a hot air temperature of 40 - 65°C and a hot air volume of 800 - 1200 m³ / h. The dehydrated fish maw falls on a vibrating water drainage conveyor, and the surface free water is removed through vibration with an amplitude of 5 - 10 mm. The infrared moisture detector at the end of the vibrating water drainage conveyor monitors in real time to ensure that the moisture content of the fish maw ≤ 30%. Step 4: The vibrating water drainage conveyor feeds the fish maw into a paddle-type mixing conveyor, and at the same time, a quantitative pump injects a preheated seasoning liquid at 60 - 70°C, and the paddle stirs at a speed of 30 - 50 rpm to evenly coat the fish maw with the liquid. Step 5: The mixed fish maw is fed into a continuous sterilization kettle through a sterile pipeline and sterilized at 121°C for 15 minutes. After sterilization, it enters a back-pressure cooling tunnel, and the water temperature in this back-pressure cooling tunnel drops from 80°C in a gradient to 40°C to reduce the central temperature of the fish maw to 40°C. Step 6: The sterilized fish maw falls into the filling section, and then is filled, sealed, inspected, and stored as finished products.

[0017] Through the precise control and efficient connection of multiple links such as thawing and cleaning, cutting and soaking, dehydration and seasoning, sterilization and packaging, this technical solution not only ensures the nutrition and taste of the fish maw, but also effectively removes fishy smell and impurities, greatly improves production efficiency, reduces manual intervention, and realizes the industrial production goal of stable quality, high efficiency and energy saving.

[0018] As an extension of the above solution, in step 3: In the start-up stage when the fish maw enters the dehydration separation equipment, the first motor first starts the rotation of the rotating drum at a set first speed, and the second motor drives the screw feeder at a second speed through the differential. The differential ratio of the first speed to the second speed is 1.2 - 2.5:1; In the dehydration stage, the second motor adjusts the second speed in real time according to the torque feedback of the torque sensor to maintain the differential ratio set by the current process. When the first speed of the rotating drum decreases due to an increase in load, the differential synchronously reduces the second speed of the screw feeder to prevent the fish maw from accumulating due to speed mismatch.

[0019] This technical solution monitors the load change in real time through the torque sensor and drives the second motor to dynamically adjust the speed of the screw feeder. Even if the speed of the rotating drum decreases due to the viscosity or accumulation of the fish maw, the feeder can also reduce the speed synchronously to maintain the speed matching between the two, prevent the material from accumulating and blocking, improve the operation stability and production efficiency of the equipment, and at the same time ensure the uniform transportation and heating of the fish maw in the rotating drum, increase the drying uniformity, and effectively improve the product quality and production benefits.

[0020] As an extension of the above solution, the torque sensor collects the real-time torque value of the transmission shaft of the screw feeder at a frequency of 100 Hz and transmits it to the controller for processing. The controller pre-sets the normal working torque threshold, and the controller executes the following processing steps: When the real-time torque value exceeds the upper threshold, it means that the pushing resistance of the fish maw increases due to viscosity or accumulation, and the controller sends an acceleration command to the second motor; When the real-time torque value is lower than the lower threshold, it means that the water content of the fish maw has dropped to a relatively low level, or the feeding amount is too small, or the material in the rotating drum is sparse, and the drying is easy to push, the pushing resistance decreases, and the torque drops. The controller sends a deceleration command to the second motor to save energy on the premise of ensuring the dehydration effect, avoid the material from being over-dried or idling, and achieve dynamic adjustment.

[0021] This extended solution accurately responds to the complex working conditions during the fish maw dehydration process through 100 Hz high-frequency sampling and intelligent threshold judgment mechanism, and effectively solves the problems of material blockage, energy consumption waste and unstable quality existing in traditional equipment. This embodiment can adapt to the water content differences of different batches of fish maw, realize the real-time optimization of production parameters, and improve the drying uniformity and product qualification rate.

[0022] As an extension of the above solution, the processing method includes a step of segmental control of the hot air temperature: Pre-drying control: In the early stage when the fish maw enters the dehydration stage, when the first rotation speed of the rotary drum is controlled at 18 - 20 r / min and the second rotation speed of the screw feeder is controlled at 10 - 11 r / min, the hot air temperature is controlled at 60 - 65 °C, and the hot air volume is 1000 - 1200 m³ / h. The fish maw in the rotary drum is dried with hot air through the directional hot air flow for 0.5 - 2 h, and the moisture content of the fish maw is reduced to 50% ± 5%, then it enters the constant-rate drying stage. Constant-rate drying control: The first rotation speed of the rotary drum is controlled at 16 - 18 r / min and the second rotation speed of the screw feeder is controlled at 9 - 10 r / min. The hot air temperature is adjusted to 55 - 60 °C, and the hot air volume is 900 - 1000 m³ / h. The fish maw in the rotary drum is dried with hot air through the directional hot air flow for 0.5 - 3 h, and the moisture content of the fish maw is reduced to 30% ± 5%, then it enters the falling-rate drying stage. Falling-rate drying control: The first rotation speed of the rotary drum is controlled at 15 - 16 r / min and the second rotation speed of the feeder is controlled at 8 - 9 r / min. The hot air temperature is adjusted to 50 - 55 °C, and the hot air volume is 800 - 900 m³ / h. The fish maw in the rotary drum is dried with hot air through the directional hot air flow for 0.5 - 3 h, and the moisture content of the fish maw is reduced to 18% ± 5%, completing the dehydration.

[0023] This extended solution targets the characteristics of fish maw at different drying stages, precisely regulating the rotation speeds of the rotary drum and the screw feeder, the hot air temperature, and the air volume, effectively solving the problems of uneven drying, nutrient loss, and high energy consumption that are prone to occur in traditional drying. Compared with traditional single-temperature drying, this method improves the collagen retention rate of fish maw, enhances the drying efficiency, and realizes high-efficiency, energy-saving, and high-quality fish maw dehydration production.

[0024] As an extension of the above solution, the soaking tank includes a primary soaking tank, several intermediate soaking tanks, and a final soaking tank. The multiple soaking tanks are arranged in a downward-sloping arrangement with an inclination angle of 3 - 15°. Inclined pipes are provided between the soaking tanks to form a gradient soaking connection. The inclined pipes are provided with control valves and flow deflectors, and each soaking tank is provided with a water circulation filtration device. In the soaking liquid of the primary soaking tank, the content of cooking wine is 10%, the content of ginger slices is 3%, and the content of citric acid is 0.2%. In the soaking liquid of the intermediate soaking tank, the content of cooking wine is 5% - 7%, the content of ginger slices is 2% - 2.5%, and the content of citric acid is 0.1% - 0.15%. In the soaking liquid of the final soaking tank, the content of cooking wine is 5%, the content of ginger slices is 2%, and the content of citric acid is 0.1%, and the proportion of clear water is appropriately increased.

[0025] In this extended solution, the concentration of the soaking liquid in the primary soaking tank is relatively high, which can quickly remove a large amount of impurities and fishy substances on the surface of the fish maw when the fish maw just enters the soaking process. The concentration of the soaking liquid in each intermediate soaking tank gradually decreases. Reducing the concentration of the soaking liquid can not only continuously remove the fishy smell inside the fish maw, but also avoid over-soaking, which may cause the texture of the fish maw to become soft and nutritional loss, and at the same time reduce the residue of the soaking liquid components on the surface of the fish maw. The soaking liquid in the final soaking tank pays more attention to fine-tuning the quality, mainly used to moisten and nourish the fish maw, making the taste of the fish maw better, and at the same time reducing the residue of strongly volatile components, thus reducing the burden on the subsequent cleaning process. Description of the Drawings

[0026] The present invention will be further described below in conjunction with the drawings and embodiments; Figure 1 It is a schematic structural diagram of the dehydration and separation equipment of the embodiment.

[0027] In the drawings: 100: rotary drum, 110: feeding port, 120: discharging port, 130: main shaft, 140: infrared sensor, 200: screw pusher, 210: screw shaft, 220: screw blade, 300: first motor, 400: second motor, 500: differential, 600: torque sensor, 700: hot air circulation device, 710: first hot air duct, 720: second hot air duct, 730: temperature sensor. Detailed Description of the Embodiment

[0028] This part will describe the specific embodiments of the present invention in detail. The preferred embodiments of the present invention are shown in the drawings. The role of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the protection scope of the present invention.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present invention, if there are descriptions with words such as "several", its meaning is one or more, and the meaning of multiple is more than two. Understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number.

[0031] In the description of the present invention, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0032] Refer to Figure 1 , several embodiments of the dehydration and separation equipment and processing method of an instant fish maw of the present invention are given below.

[0033] As Figure 1 shown, in some embodiments, a dehydration and separation equipment for instant fish maw includes: A rotating drum 100, which is a cylindrical metal shell with a smooth inner wall, and a feeding port 110 and a discharging port 120 are respectively arranged at both ends; A spiral pusher 200, including a spiral shaft 210 and spiral blades 220 arranged on the spiral shaft 210. The spiral pusher 200 is installed in the rotating drum 100. The spiral shaft 210 of the spiral pusher 200 is coaxially arranged with the main shaft 130 of the rotating drum 100. There is a gap between the spiral blades 220 and the inner wall of the rotating drum 100, and the gap is 0.5 - 2 cm; A first motor 300, which is connected to the main shaft 130 of the rotating drum 100 through a rigid coupling; A second motor 400, which is connected to the transmission shaft of the spiral pusher 200 through a differential 500, and is used to adjust the rotational speed difference between the spiral pusher 200 and the rotating drum 100 and the forward and reverse rotations between them; A torque sensor 600, which is installed on the transmission shaft of the spiral pusher 200 to monitor the torque change during the operation of the spiral pusher 200 in real time; A hot air circulation device 700, which has a first hot air pipeline 710 and a second hot air pipeline 720. The first hot air pipeline 710 and the second hot air pipeline 720 are respectively connected to both ends of the rotating drum 100 to form a directional air flow of hot air between the rotating drum 100 and the hot air circulation device 700. Temperature sensors 730 are respectively arranged on the first hot air pipeline 710 and the second hot air pipeline 720.

[0034] Compared with the traditional one, the dehydration and separation equipment of this embodiment adjusts the rotational speed difference between the spiral pusher and the rotating drum and the forward and reverse rotations between them through the second motor and the differential. The second motor and the differential enable the rotating drum and the spiral pusher to realize the switching of forward and reverse rotations in two directions, that is, the switching of positive and negative differential ratios, so that the fish maw moves automatically and reciprocally in the rotating drum, avoiding uneven residence time caused by one-way transportation and improving the drying uniformity.

[0035] In this embodiment, a double-turning mechanism is constructed for the rotary drum and the screw feeder by using a differential. The first motor is connected to the main shaft of the rotary drum through a rigid coupling to tumble the fish maw in the rotary drum. The second motor is connected to the transmission shaft of the screw feeder through a differential and rotates at a speed lower than that of the rotary drum to achieve the pushing and tumbling of the fish maw. By using a planetary gear differential, the speed ratio between the rotary drum and the screw feeder can be adjusted to ensure the coordination of the relative movement between the screw feeder and the rotary drum, avoid extrusion, promote the penetration of hot air, and reduce the breakage of the fish maw.

[0036] The torque sensor in this embodiment monitors the pushing resistance in real time (reflecting the changes in the amount and moisture content of the fish maw), adjusts the output of the second motor to ensure the stability of the differential ratio. When the moisture content of the fish maw is high and the viscosity is large, the torque increases, and the speed of the second motor is increased to avoid the stop of the feeder due to resistance. Compared with the traditional independent control that requires manual presetting of multiple groups of speed parameters and cannot cope with real-time load changes, it may cause situations such as the rotary drum idling, the feeder jamming, or the pushing being too fast and the fish maw being damaged. Dynamically adjusting the speeds of the rotary drum and the screw feeder according to the moisture content of the fish maw can effectively improve the dehydration uniformity.

[0037] Those skilled in the art can understand that gates are provided at the inlet and outlet. The gates are opened during feeding or discharging and closed during the dehydration operation. In this embodiment, the gates at the inlet or outlet are divided into two semi-circular or semi-conical door bodies, and the two door bodies form a complete gate, which is provided at the inlet or outlet. The two semi-circular or semi-conical gates can be opened separately or simultaneously. When feeding, one door body can be opened for blanking. When discharging, the two door bodies can be opened simultaneously, and the edge of the door body at the outlet extends from the end towards the middle direction, extending at least beyond the narrowing transition connection of the spiral blades (the outer diameter of the spiral blades is designed to shrink near the end, and the position where the large outer diameter section in the middle is connected to the reduced outer diameter section at the end is the narrowing transition connection of the spiral blades), so that when the two door bodies are opened during discharging, all the fish maw in the rotary drum can be pushed out through the spiral blades. The structural setting of the gate and the means to achieve opening and closing can be realized by using existing technologies.

[0038] In some embodiments, the differential 500 is a planetary gear differential, which includes a sun gear, planetary gears, a ring gear, and a planet carrier. The planetary gears are located between the sun gear and the ring gear and are connected to the planet carrier. It should be noted that the principle and implementation method of the planetary gear differential to achieve differential control are realized by using existing technologies, and will not be elaborated here.

[0039] The first motor 300 is drivingly connected to the sun gear. The second motor 400 inputs power through the ring gear. The planet carrier is drivingly connected to the screw feeder 200. Through the planetary gear differential, it is drivingly connected to the rotating drum and the screw feeder. The first motor drives the sun gear, the second motor drives the ring gear, and the planet carrier outputs to the screw feeder, forming a differential drive chain with double inputs and single output. When the second motor rotates in the reverse direction, a negative differential ratio is output (the screw feeder and the rotating drum rotate in opposite directions), realizing the bidirectional movement of the screw feeder.

[0040] In some embodiments, infrared sensors 140 are respectively provided at the feed inlet 110 and the discharge outlet 120 of the rotating drum 100 for real-time monitoring of the position of the fish maw during the dehydration stage. When the infrared sensor 140 at the discharge outlet 120 detects the fish maw, the rotation direction between the screw feeder 200 and the rotating drum 100 is switched through the second motor 400, so that the rotating drum 100 and the screw feeder 200 rotate in opposite directions, and the differential ratio is switched to a negative value to start reverse feeding. When the infrared sensor 140 at the feed inlet 110 detects the fish maw, the rotation direction between the screw feeder 200 and the rotating drum 100 is switched through the second motor 400, so that the rotating drum 100 and the screw feeder 200 rotate in the same direction, and the differential ratio is switched to a positive value to resume forward feeding, forming a closed-loop reciprocation.

[0041] For example: when the first motor drives the sun gear to rotate at a first speed N1, the second motor drives the ring gear to rotate in the same direction at a second speed N2. At this time, the speed N3 of the planet carrier (screw feeder) = (N1 + N2) / 2, and the speed difference between the two is N1 - N3 = (N1 - N2) / 2, forming a forward pushing force. When the screw feeder needs to rotate in the reverse direction, the second motor drives the ring gear to rotate in the reverse direction at a speed of -N4. At this time, the speed N3' of the planet carrier = (N1 - N4) / 2. When N1 is less than N4, that is, N3' can be made negative, and the screw feeder rotates in the reverse direction to realize the reciprocating pushing of the fish maw. This description is to clearly explain the operation that the screw feeder can achieve forward and reverse rotation through the differential. Those skilled in the art can also obtain other ways to realize the forward and reverse rotation of the screw feeder according to the existing technology and the conventional application of the differential. This embodiment does not impose any form of limitation on this. In some specific embodiments, by real-time monitoring the torque of the screw feeder, when the reverse pushing resistance is too large, the second motor can automatically adjust the speed of the ring gear to avoid overload. At the same time, an overload protection mechanism is set to cut off the power of the second motor when the torque exceeds the specified threshold to prevent equipment damage.

[0042] This embodiment uses infrared sensors to monitor the position of the fish maw at the inlet and outlet of the rotating drum, triggering reverse push in advance to prevent fish maw accumulation at the ends of the drum and a sudden increase in the screw pusher's resistance. Compared to the passive response of torque sensors, this can reduce overload shock. Traditional mechanical limit switches require fish maw contact to trigger, which can easily lead to excessive accumulation at the ends.

[0043] In some embodiments, the hot air circulation device 700 includes: Hot air generator, used to provide 40-65℃ hot air; The circulating fan blows the hot air toward one end of the rotating drum 100 through the first hot air duct 710. The hot air flows through the tumbling fish maw and takes away moisture when it comes into contact with the surface of the fish maw. The hot air flows out through the other end of the rotating drum 100 and flows back to the hot air circulation device through the second hot air duct 720 to form a directional airflow of hot air. A hygroscopic filter layer is provided at the connection between the second hot air duct 720 and the hot air circulation device. The hygroscopic filter layer is realized by using the hygroscopic and / or filtering structure in the prior art.

[0044] In some specific embodiments, a pressure relief channel and an air pressure sensor are also provided on the hot air flow path of the hot air circulation device, which can be specifically provided on the second hot air duct. When the air flow pressure is too high, the air pressure balance of the hot air circulation device is maintained through the pressure relief channel.

[0045] The fish maw of this embodiment reciprocates in the rotating drum and comes into contact with hot air multiple times, which reduces the moisture content deviation and greatly improves the consistency of product quality. At the same time, 40-65°C hot air is introduced into the rotating drum to make the hot air evenly distributed and penetrate the turning fish maw, effectively shortening the drying time and improving production efficiency. The moisture absorption filter layer is used to absorb the moisture brought out by the hot air in the second hot air duct to ensure the hot air drying in the recycle cycle.

[0046] In some embodiments, the temperature sensor 730 includes a first temperature sensor provided in the first hot air duct 710 and a second temperature sensor provided in the second hot air duct 720, for obtaining the first hot air temperature and the second hot air temperature at both ends of the drum 100; When the temperature difference between the first hot air temperature and the second hot air temperature is greater than a preset temperature difference threshold, the hot air generator is controlled to increase power to increase the hot air temperature and / or the circulating fan is controlled to increase the hot air volume.

[0047] This embodiment controls the hot air temperature and hot air volume based on the temperature difference, solving the problem of uneven temperature distribution in traditional hot air drying. In traditional equipment, hot air enters from one end of the rotating drum. Due to factors such as material blockage and air flow attenuation, the temperature at the inlet end is high (up to 70 °C), and the temperature at the outlet end is low (as low as 40 °C), with a temperature difference exceeding 20 °C, resulting in uneven drying of the material. This embodiment automatically controls the hot air generator to increase the power according to the temperature difference value to increase the hot air temperature and / or controls the circulation fan to increase the hot air volume, reducing the moisture content deviation of the fish maw.

[0048] In some embodiments, a processing method for instant fish maw, the processing method comprising the following steps: Step 1: Pretreat the dried tubular fish maw, the pretreatment including thawing, rinsing the surface and inner wall, and cutting into blocks or slices; Place the dried tubular fish maw in a low-temperature running water environment at 0 - 4 °C for thawing, or thaw in a refrigerator at a temperature below 4 °C, and control the thawing duration at 8 - 12 hours according to the thickness of the fish maw. After thawing, rinse the surface of the fish maw with running water, and at the same time gently brush with a soft brush to remove dust, residual salt and mucus; Using the inner wall flushing technology of pipe insertion, insert the water pipe into the inside of the tubular fish maw, and flush the inner wall with a high-pressure water flow of 0.2 - 0.5 MPa to thoroughly remove blood, grease and attached impurities. If necessary, a food-grade baking soda solution with a concentration of 0.5% can be added to assist in decontamination, and then use medical tweezers or cotton swabs to clean the residual fish oil in the folds. The traditional process for cleaning the inner wall of tubular fish maw often uses manual flushing or simple soaking, which is difficult to completely remove the internal blood and grease. This embodiment uses the inner wall flushing technology of pipe insertion to direct the flushing with a high-pressure water flow of 0.2 - 0.5 MPa, and a baking soda solution can also be added for assistance; According to the product specification requirements, cut the fish maw into blocks of 3 - 5 cm, or cut into slices after longitudinally splitting, ensuring that the cut is neat and avoiding the generation of debris; Step 2: Send the cut fish maw into an immersion pool composed of multiple stages in series, and purify the water body in real time through a water circulation filtration pipeline, keeping the water temperature at 20 - 25 °C. After the immersion is completed, the fish maw is lifted from the immersion pool by a mesh belt conveyor. During the transmission process, the fish maw is rinsed by setting high-pressure spray heads to remove the residual immersion liquid on the surface; in this step, the water circulation filtration pipeline is connected to a water circulation filtration device (activated carbon + precision filter screen), and this water circulation filtration device is realized by means of existing technologies; in some specific embodiments: the circulation flow rate is controlled at 1 - 2 times per hour, the fish maw is soaked step by step in the immersion pool, with a total duration of 8 - 12 hours, and the immersion liquid is automatically replaced 1 - 2 times in the middle. The water circulation filtration device can purify the immersion liquid in real time, extend the service life of the immersion liquid, reduce resource waste, lower production costs, and at the same time ensure the hygiene of the immersion environment, laying a solid foundation for the production of high-quality instant fish maw; Step 3: The fish maw enters the dehydration and separation equipment of the instant fish maw in the above-mentioned embodiment, and is dehydrated with a hot air temperature of 40 - 65°C and a hot air volume of 800 - 1200 m³ / h. The dehydrated fish maw falls on the vibrating water-draining conveyor, and the surface free water is removed through vibration with an amplitude of 5 - 10 mm. The infrared moisture detector at the end of the vibrating water-draining conveyor monitors in real time to ensure that the moisture content of the fish maw ≤ 30%; Step 4: The vibrating water-draining conveyor sends the fish maw into the paddle-type mixing conveyor, and at the same time, a metering pump injects a preheated seasoning liquid at 60 - 70°C. The paddles stir at a speed of 30 - 50 rpm to evenly coat the fish maw with the liquid; Traditional seasoning is mostly manual stirring, which is not evenly mixed and easily causes nutrient loss. By using a paddle-type mixing conveyor with the paddles coated with silica gel and low-speed stirring, the uniformity of the mixing of the seasoning liquid and the fish maw is effectively improved; Step 5: The mixed fish maw is sent into a continuous sterilization kettle through a sterile pipeline (pipe diameter DN50 - DN80, conveying pressure 0.1 - 0.2 MPa, flow rate 1 - 2 m / s), sterilized at 121°C for 15 min, and then enters the back-pressure cooling tunnel. The water temperature in this back-pressure cooling tunnel drops from 80°C to 40°C in a gradient manner, and the central temperature of the fish maw is reduced to 40°C within 8 min; Step 6: The sterilized fish maw falls into the filling section, and then is filled, sealed, inspected, and stored as a finished product; The sterilized fish maw falls into the filling turntable through a pneumatic turnover device, and a negative pressure adsorption type loader (suction force 0.05 - 0.08 MPa) accurately places the fish maw into the prefabricated packaging bag / can. The filling process is carried out under a laminar flow hood with a cleanliness of 100 levels. After filling, a vacuum packaging machine is used for sealing, and the vacuum degree ≤ -0.08 MPa.

[0049] Through the precise control and efficient connection of multiple links such as thawing and cleaning, cutting and soaking, dehydrating and seasoning, sterilizing and packaging in this embodiment, it not only ensures the nutrition and taste of the fish maw, but also effectively removes fishy smell and impurities, greatly improves production efficiency, reduces manual intervention, and realizes the industrial production goal of stable quality, high efficiency and energy saving.

[0050] It should be noted that this embodiment places no restrictions of any kind on the structures and configurations such as the inner wall flushing technology of pipe sockets (usually consisting of a telescopic water pipe, a high-pressure water pump, and a multi-angle rotating nozzle as the core structure, inserting the telescopic water pipe into the cylindrical fish maw, using high-pressure water flow for cyclic flushing, and equipped with a multi-angle rotating nozzle to ensure cleaning without dead corners on the inner wall), the mesh belt conveyor (generally including a stainless steel mesh belt, a variable-frequency drive roller group, and a tension adjustment device, the conveyor is driven by a variable-frequency motor, achieving stepless speed regulation through chain drive, and having a water receiving tray at the bottom to collect dripping liquid), the water circulation filtration device (usually adopting a three-stage series filtration structure, successively being a coarse filter screen, a precision filter screen, and an activated carbon adsorption layer. The outer shell is a cylindrical tank made of PP material, with a flow guide partition inside, a circulation water pump installed at the bottom, and an exhaust valve and a sampling port equipped at the top), the vibrating water-draining conveyor (generally composed of an eccentric vibrating motor, a silica gel anti-slip conveyor belt, and an infrared moisture detection module, the vibrating motor is connected to the frame through a spring shock absorber, and the amplitude can be adjusted to 5 - 10 mm; the conveyor belt adopts a modular design for easy disassembly and cleaning; an infrared moisture sensor is integrated at the end to monitor the moisture content of the material in real time), the paddle-type mixing conveyor (usually including a stainless steel tank body, double-axis staggered paddle blades, and a variable-frequency stirring motor, the paddle blades are installed obliquely and the surfaces are polished, and mechanical seals are used at the shaft ends to prevent material leakage; the bottom of the tank body is designed in an arc shape and is equipped with a heating jacket, and hot water at 60 - 70 °C can be introduced to preheat the seasoning liquid), the sterile pipeline (generally using a stainless steel pipe equipped with a quick-installing clamp-type joint and a CIP cleaning interface, the inner wall of the pipeline is electro-polished, pressure sensors and temperature probes can be set to monitor the conveying state, and a centrifugal pump is provided to provide the conveying pressure), the continuous sterilization kettle (generally adopting a horizontal cylindrical structure, consisting of a steam heating jacket, a circulating water bath system, and a mesh belt conveying device, sealing doors are provided at both ends of the kettle body, temperature sensors and a circulating water pump are equipped inside to achieve constant temperature sterilization at 121 °C; the mesh belt is made of high-temperature-resistant Teflon material and is continuously conveyed through the drive of a variable-frequency motor), the back-pressure cooling tunnel (usually composed of five stainless steel cooling tanks in series, each level is equipped with an independent water circulation system and a temperature sensor, a spiral stirrer is installed at the bottom of the tank to ensure uniform water temperature; a spraying device is provided at the top to achieve gradient cooling from 80 °C to 40 °C), the pneumatic turnover device (generally composed of a cylinder drive mechanism, a vacuum adsorption fixture, and a positioning slide rail, the cylinder drives the turnover plate through a connecting rod mechanism, the fixture is equipped with a porous vacuum suction cup, and the slide rail uses a linear ball guide rail and is combined with an optoelectronic sensor for positioning), etc. The above-mentioned devices and machines can achieve their own functions from the means of the prior art and the functions and roles of this application when applying them to the method steps of this embodiment. Therefore, the means for the above-mentioned devices and machines to achieve the relevant functions will not be elaborated too much.

[0051] In some embodiments, in step three: In the startup phase when the fish maw enters the dehydration and separation equipment, the first motor first starts the rotation of the rotating drum at a set first rotational speed, and the second motor drives the screw feeder through the differential at a second rotational speed. The differential ratio of the first rotational speed to the second rotational speed is 1.2 - 2.5:1; In the dehydration phase, the second motor adjusts the second rotational speed in real time according to the torque feedback of the torque sensor to maintain the differential ratio set by the current process. When the first rotational speed of the rotating drum decreases due to an increase in load, the differential synchronously reduces the second rotational speed of the screw feeder to prevent the accumulation of fish maw caused by speed mismatch between the two.

[0052] In this embodiment, through dynamic adjustment based on torque feedback, the problems of material accumulation, equipment overload, and uneven drying that are prone to occur during the fish maw dehydration process are effectively solved. The torque sensor monitors the load change in real time and drives the second motor to dynamically adjust the rotational speed of the screw feeder to ensure a constant differential ratio. Even if the rotational speed of the rotating drum decreases due to the viscosity or accumulation of the fish maw, the feeder can also reduce its speed synchronously to maintain the speed matching between the two, prevent material accumulation and blockage, improve the operation stability and production efficiency of the equipment, and at the same time ensure the uniform transportation and heating of the fish maw in the rotating drum, increase the drying uniformity, and effectively improve the product quality and production benefits.

[0053] In some embodiments, the torque sensor collects the real-time torque value of the transmission shaft of the screw feeder at a frequency of 100 Hz in real time and transmits it to the controller for processing. The controller pre-sets a normal working torque threshold, and the controller executes the following processing steps: When the real-time torque value exceeds the upper threshold, it indicates that the pushing resistance of the fish maw increases due to viscosity or accumulation. The controller sends an acceleration command to the second motor; When the real-time torque value is lower than the lower threshold, it indicates that the water content of the fish maw has dropped to a relatively low level, or the feeding amount is too small, or the material in the rotating drum is sparse, and it is easy to push during drying, the pushing resistance decreases, and the torque drops. The controller sends a deceleration command to the second motor to save energy on the premise of ensuring the dehydration effect, avoid over-drying of the material or idling, and achieve dynamic adjustment.

[0054] This embodiment accurately responds to the complex working conditions during the fish maw dehydration process through 100 Hz high-frequency sampling and an intelligent threshold judgment mechanism, and effectively solves the problems of material blockage, energy consumption waste, and unstable quality existing in traditional equipment. This embodiment can adapt to the water content differences of different batches of fish maw, realize the real-time optimization of production parameters, improve the drying uniformity and product qualification rate.

[0055] When the torque exceeds the upper threshold value, the controller responds quickly and drives the second motor to accelerate, which can enhance the pushing ability of the screw feeder within a short time, reduce the risk of equipment shutdown caused by material accumulation, and significantly improve production continuity; when the torque is lower than the lower threshold value, a deceleration instruction is automatically triggered to avoid the motor from idling and the material from being too dry, and the energy consumption is reduced compared with the traditional constant speed mode.

[0056] In some embodiments, the processing method includes a step of controlling the hot air temperature in segments: Pre-drying control: In the early stage when the fish maw enters the dehydration stage, when the first rotation speed of the rotary drum is controlled to be 18 - 20 r / min and the second rotation speed of the screw feeder is 10 - 11 r / min, the hot air temperature is controlled to be 60 - 65 °C, and the hot air volume is 1000 - 1200 m³ / h. The fish maw in the rotary drum is dried by hot air through the directional air flow of hot air for 0.5 - 2 h, and the moisture content of the fish maw is reduced to 50% ± 5%, then it enters the constant rate drying stage. Constant rate drying control: The first rotation speed of the rotary drum is controlled to be 16 - 18 r / min and the second rotation speed of the feeder is 9 - 10 r / min. The hot air temperature is adjusted to 55 - 60 °C, and the hot air volume is 900 - 1000 m³ / h. The fish maw in the rotary drum is dried by hot air through the directional air flow of hot air for 0.5 - 3 h, and the moisture content of the fish maw is reduced to 30% ± 5%, then it enters the falling rate drying stage. Falling rate drying control: The first rotation speed of the rotary drum is controlled to be 15 - 16 r / min and the second rotation speed of the feeder is 8 - 9 r / min. The hot air temperature is adjusted to 50 - 55 °C, and the hot air volume is 800 - 900 m³ / h. The fish maw in the rotary drum is dried by hot air through the directional air flow of hot air for 0.5 - 3 h, and the moisture content of the fish maw is reduced to 18% ± 5%, thus completing the dehydration.

[0057] In this embodiment, aiming at the characteristics of fish maw at different drying stages, the rotation speeds of the rotary drum and the screw feeder, the hot air temperature and the air volume are precisely controlled, effectively solving the problems of uneven drying, nutrient loss, high energy consumption, etc. that are prone to occur in traditional drying. In the pre-drying stage, a relatively high hot air temperature (60 - 65 °C) and a rapid flipping speed of the fish maw (rotary drum 18 - 20 r / min, feeder 10 - 11 r / min) can quickly evaporate the surface moisture of the fish maw within 0.5 - 2 h, and the moisture content is reduced to 50% ± 5%, laying a foundation for subsequent drying; in the constant-rate drying stage, the hot air temperature is reduced to 55 - 60 °C and the material movement speed is slowed down. While ensuring continuous evaporation of moisture, it avoids collagen denaturation caused by too high temperature, and the moisture content is stably reduced to 30% ± 5%; in the falling-rate drying stage, it operates at a low temperature (50 - 55 °C), low air volume (800 - 900 m³ / h) and low speed, so that the internal moisture of the fish maw is slowly discharged, and the final moisture content is precisely controlled at 18% ± 5%, which not only ensures the dehydration effect, but also retains the nutritional components and taste of the fish maw to the greatest extent. Compared with traditional single-temperature drying, this method improves the collagen retention rate of fish maw, enhances the drying efficiency, and realizes high-efficiency, energy-saving and high-quality fish maw dehydration production.

[0058] In some embodiments, the soaking tank includes a primary soaking tank, a plurality of intermediate soaking tanks and a final soaking tank. The multiple soaking tanks are arranged in a downward inclined arrangement at an inclination angle of 3 - 15°. Inclined pipes are provided between the soaking tanks to form a gradient soaking connection. The inclined pipes are provided with control valves and flow guide plates, and each soaking tank is provided with a water circulation filtration device; The cut fish maw is sent into the soaking tank and soaked in the soaking liquid. The soaking liquid includes the following components by weight percentage: 5 - 10% cooking wine, 2 - 3% ginger slices, 0.1 - 0.2% citric acid, and the balance is water. Among them: In the soaking liquid of the primary soaking tank, the content of cooking wine is 10%, the proportion of ginger slices is 3%, and the content of citric acid is 0.2%; The concentration of the soaking liquid in the intermediate soaking tank gradually decreases. The content of cooking wine is controlled at 5% - 7%, the proportion of ginger slices is 2% - 2.5%, and the content of citric acid is 0.1% - 0.15%; In the soaking liquid of the final soaking tank, the content of cooking wine is 5%, the proportion of ginger slices is 2%, and the content of citric acid is 0.1%, and the proportion of water is appropriately increased.

[0059] In this embodiment, the first-stage soaking tank mainly undertakes the heavy responsibility of decontamination. After the fish maw is cut, there will be some processing debris, a small amount of blood and impurities that were not completely removed during the pre-treatment on the surface and at the cut. The soaking liquid in the first-stage soaking tank exerts a powerful decontamination effect under the synergistic action of various components. As the basic solvent, water, the alcohol component in cooking wine can dissolve some oil-based impurities, and its volatility helps to initially disperse the fishy smell; ginger slices contain components such as gingerol, which can not only assist in removing the fishy smell, but also have an inhibitory effect on some microorganisms; citric acid can adjust the pH value of the soaking liquid, causing some insoluble dirt to undergo a chemical reaction and transform into a soluble state, facilitating cleaning and removal. At this stage, the soaking liquid is continuously purified through the water circulation filtration device. Activated carbon can adsorb pigments, odor molecules and tiny organic impurities in the soaking liquid, while the precision filter screen intercepts particulate impurities, maintaining the cleanliness of the soaking liquid and ensuring the continuity of the decontamination effect.

[0060] Several intermediate-stage soaking tanks mainly focus on deep fishy smell removal and flavor improvement of the fish maw. As the fish maw gradually enters from the first-stage soaking tank, the remaining fishy smell substances from the previous stage are further removed. At this time, the cooking wine and ginger slices in the soaking liquid continue to play the role of removing the fishy smell. At the same time, the presence of citric acid helps the fish maw maintain a certain texture stability during soaking, preventing excessive softening. Due to the long soaking time and the gradual loosening of the internal structure of the fish maw during the step-by-step soaking process, the soaking liquid can penetrate more deeply into the fish maw tissue and displace the fishy smell components. And by controlling the circulation flow rate at 1 - 2 times per hour, the soaking liquid is always kept active and continuously exchanges with the fishy smell substances in the fish maw, further improving the fishy smell removal effect.

[0061] The last-stage soaking tank focuses on fine-tuning the quality of the fish maw and removing the remaining soaking liquid. After being treated in the previous soaking tanks at all levels, the fishy smell of the fish maw has been significantly reduced. In the last-stage soaking tank, the component ratio of the soaking liquid can be appropriately adjusted to reduce the content of strongly volatile components such as cooking wine, avoiding the remaining overly strong smell. At this time, the soaking liquid mainly plays the role of moistening and nourishing the fish maw, making the taste of the fish maw softer and smoother. At the same time, the water circulation filtration device continues to work to ensure the purity of the soaking liquid and prevent secondary pollution.

[0062] The above has specifically described the preferred embodiments of the present invention, but the present invention is not limited to the described embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present invention, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A dehydration separation device for instant fish maw, characterized in that, include: The rotating drum (100) is a cylindrical metal shell with a smooth inner wall and a material inlet (110) and a material outlet (120) respectively provided at both ends; A screw pusher (200) comprises a screw shaft (210) and a screw blade (220) arranged on the screw shaft (210), wherein the screw pusher (200) is installed in the rotating drum (100), the screw shaft (210) is coaxially arranged with the main shaft (130) of the rotating drum (100), and a gap is formed between the screw blade (220) and the inner wall of the rotating drum (100); A first motor (300) connected to the main shaft of the rotating drum (100) via a rigid coupling; A second motor (400) is connected to the transmission shaft of the screw pusher (200) via a differential (500) and is used to adjust the speed difference between the screw pusher (200) and the rotating drum (100) and the forward and reverse rotation between them; a torque sensor (600) mounted on the transmission shaft of the screw pusher (200) to monitor in real time the torque change of the screw pusher (200) during operation; The hot air circulation device (700) comprises a first hot air duct (710) and a second hot air duct (720), wherein the first hot air duct (710) and the second hot air duct (720) are respectively connected to the two ends of the rotating drum (100), forming a directional hot air flow between the rotating drum (100) and the hot air circulation device (700), and the first hot air duct (710) and the second hot air duct (720) are respectively provided with a temperature sensor (730).

2. The dehydration and separation device for instant fish maw according to claim 1, wherein The differential (500) is a planetary gear differential, comprising a sun gear, planetary gears, a ring gear, and a planetary carrier, wherein the planetary gears are located between the sun gear and the ring gear and are connected to the planetary carrier, the first motor (300) is in transmission connection with the sun gear, the second motor (400) inputs power through the ring gear, and the planetary carrier is in transmission connection with the screw pusher (200).

3. The dehydration and separation device for instant fish maw according to claim 1, characterized in that, Infrared sensors (140) are respectively provided at the inlet (110) and the outlet (120) of the rotating drum (100) for real-time monitoring of the position of the fish maw during the dehydration stage; When the infrared sensor (140) of the discharge port (120) detects the fish maw, the second motor (400) switches the rotation direction between the screw pusher (200) and the rotating drum (100), so that the rotating drum (100) and the screw pusher (200) rotate in opposite directions, the differential speed ratio is switched to a negative value, and reverse pushing is started; When the infrared sensor (140) of the feed port (110) detects fish maw, the second motor (400) switches the rotation direction between the screw pusher (200) and the rotating drum (100), so that the rotating drum (100) and the screw pusher (200) rotate in the same direction, the differential ratio is switched to a positive value, and the forward pushing direction is restored, forming a closed loop reciprocating.

4. The dehydration and separation device for instant fish maw according to claim 1, wherein, The hot air circulation device (700) comprises: A hot air generator, for providing hot air; The circulating fan blows the hot air to one end of the rotary drum (100) through the first hot air duct (710). The hot air flows through the tumbling fish maw, takes away moisture when contacting the surface of the fish maw, and the hot air flows out from the other end of the rotary drum (100), and returns to the hot air circulation device (700) through the second hot air duct (720) to form a directional hot air flow. A moisture absorption and filtration layer is provided at the connection between the second hot air duct (720) and the hot air circulation device.

5. The dehydration and separation device for instant fish maw according to claim 4, characterized in that, The temperature sensor (730) includes a first temperature sensor disposed in the first hot air duct (710) and a second temperature sensor disposed in the second hot air duct (720), and is used to obtain the first hot air temperature and the second hot air temperature at both ends of the rotary drum (100); When the temperature difference value between the first hot air temperature and the second hot air temperature is greater than a preset temperature difference threshold, control the hot air generator to increase the power to increase the hot air temperature and / or control the circulating fan to increase the hot air volume.

6. A processing method for instant fish maw, characterized in that, The processing method includes the following steps: Step 1: Pretreat the dried tubular fish maw, and the pretreatment includes thawing, rinsing the surface and inner wall, and cutting into blocks or slices; Step 2: Feed the cut fish maw into an immersion pool formed by multiple stages in series, purify the water body in real time through a water circulation and filtration pipeline, keep the water temperature at 20 - 25 °C. After the immersion is completed, the fish maw is lifted from the immersion pool by a mesh belt conveyor. During the transmission process, the fish maw is rinsed by setting high-pressure spray nozzles to remove the residual immersion liquid on the surface; Step 3: The fish maw enters the dehydration and separation equipment for instant fish maw according to any one of claims 1 - 5, and is dehydrated at a hot air temperature of 40 - 65 °C and a hot air volume of 800 - 1200 m³ / h. The dehydrated fish maw falls on a vibrating water draining conveyor, and the surface free moisture is removed through vibration with an amplitude of 5 - 10 mm. The infrared moisture detector at the end of the vibrating water draining conveyor monitors in real time to ensure that the moisture content of the fish maw ≤ 30%; Step 4: The vibrating water draining conveyor feeds the fish maw into a paddle type mixing conveyor, and at the same time, a metering pump injects a preheated seasoning liquid at 60 - 70 °C, and the paddle stirs at a rotation speed of 30 - 50 rpm to make the fish maw evenly coated with the liquid; Step 5: The mixed fish maw is sent into a continuous sterilization kettle through a sterile pipeline, sterilized at 121 °C for 15 min, and then enters a back-pressure cooling tunnel. The water temperature in this back-pressure cooling tunnel drops from 80 °C to 40 °C in a gradient manner, and the central temperature of the fish maw is reduced to 40 °C; Step 6: The sterilized fish maw falls into the filling part, and then is filled, sealed, inspected, and warehoused as a finished product.

7. The processing method of an instant fish maw according to claim 6, characterized in that, In the third step: In the startup stage when the fish maw enters the dehydration and separation equipment, the first motor (300) first starts the rotation of the rotary drum (100) at a set first rotation speed, and the second motor (400) drives the screw feeder (200) through the differential (500) at a second rotation speed. The differential ratio of the first rotation speed to the second rotation speed is 1.2 - 2.5:1; In the dehydration stage, the second motor (400) adjusts the second rotational speed in real time according to the torque feedback of the torque sensor (600), maintains the differential ratio set by the current process, and ensures that when the first rotational speed of the rotary drum (100) decreases due to an increase in load, the differential (500) synchronously reduces the second rotational speed of the screw pusher (200), avoiding the accumulation of fish maw caused by speed mismatch between the two.

8. The processing method of an instant fish maw according to claim 7, characterized in that, The torque sensor (600) collects the real-time torque value of the transmission shaft of the screw pusher (200) at a frequency of 100 Hz in real time, transmits it to the controller for processing. The controller pre-sets a normal working torque threshold, and the controller executes the following processing steps: When the real-time torque value exceeds the upper threshold, it indicates that the fish maw causes an increase in pushing resistance due to viscosity or accumulation. The controller sends an acceleration command to the second motor (400); When the real-time torque value is lower than the lower threshold, it indicates that the water content of the fish maw has dropped to a relatively low level, or the feed rate is too small, or the material in the rotary drum (100) is sparse, and it is easy to push during drying, the pushing resistance decreases, and the torque drops. The controller sends a deceleration command to the second motor (400).

9. The processing method of an instant fish maw according to claim 7, characterized in that, The processing method includes a step of segmental control of the hot air temperature: Pre-drying control: In the early stage when the fish maw enters the dehydration stage, when the first rotational speed of the rotary drum (100) is controlled at 18 - 20 r / min and the second rotational speed of the screw pusher (200) is controlled at 10 - 11 r / min, the hot air temperature is controlled at 60 - 65 °C, and the hot air volume is 1000 - 1200 m³ / h. The fish maw in the rotary drum (100) is dried by hot air directional airflow for 0.5 - 2 h, and the water content of the fish maw is reduced to 50% ± 5%, and it enters the constant-rate drying stage; Constant-rate drying control: The first rotational speed of the rotary drum (100) is controlled at 16 - 18 r / min and the second rotational speed of the pusher is controlled at 9 - 10 r / min. The hot air temperature is adjusted to 55 - 60 °C, and the hot air volume is 900 - 1000 m³ / h. The fish maw in the rotary drum (100) is dried by hot air directional airflow for 0.5 - 3 h, and the water content of the fish maw is reduced to 30% ± 5%, and it enters the falling-rate drying stage; Falling-rate drying control: The first rotational speed of the rotary drum (100) is controlled at 15 - 16 r / min and the second rotational speed of the screw pusher is controlled at 8 - 9 r / min. The hot air temperature is adjusted to 50 - 55 °C, and the hot air volume is 800 - 900 m³ / h. The fish maw in the rotary drum (100) is dried by hot air directional airflow for 0.5 - 3 h, and the water content of the fish maw is reduced to 18% ± 5%, completing the dehydration.

10. The processing method of an instant fish maw according to claim 6, characterized in that, The soaking tank includes a primary soaking tank, several intermediate soaking tanks, and a final soaking tank. The multiple soaking tanks are arranged in a downward-sloping arrangement at an inclination angle of 3 - 15°. Inclined pipes are provided between the soaking tanks to form a gradient soaking connection. The inclined pipes are provided with control valves and flow guiding plates, and each soaking tank is provided with a water circulation filtration device; In the soaking liquid of the primary soaking tank, the content of cooking wine is 10%, the content of ginger slices is 3%, and the content of citric acid is 0.2%; In the soaking liquid of the intermediate soaking tank, the content of cooking wine is 5%-7%, the content of ginger slices is 2%-2.5%, and the content of citric acid is 0.1%-0.15%. In the soaking liquid of the final soaking tank, the content of cooking wine is 5%, the content of ginger slices is 2%, and the content of citric acid is 0.1%.

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