Fish soluble pulp concentration equipment and concentration process thereof

Abstract

The invention relates to fish soluble concentration equipment and a concentration process thereof, belongs to the technical field of fish soluble concentration, and solves the defects of a traditional flange-sealing ring structure by adopting a quick-release sealing assembly. Self-locking sealing of automatically and horizontally rotating to be attached to the inner wall of a pipeline after vertical insertion is achieved, a bolt fastening mode is abandoned, a self-locking mechanism evenly applies pressure through radial component force of a conical sealing part, and leakage caused by uneven pre-tightening force is avoided; the roller guide part converts sliding friction into rolling friction, so that the dismounting resistance is reduced, and the sealing surface damage is reduced; the combined design of the trapezoid sealing ring and the elastic ring can adapt to the high-temperature expansion and corrosive environment, the influence of particle scouring and thermal stress is relieved, the damage risk of repeated disassembly to the sealing face is eliminated, and meanwhile the operation process is simplified.

Description

Technical Field

[0001] The invention belongs to the technical field of fish slurry concentration, and in particular relates to fish slurry concentration equipment and a concentration process thereof. Background Art

[0002] The current fish-soluble slurry concentration equipment requires frequent disassembly of pipelines for cleaning and maintenance due to the high viscosity and high solid content of the material. Since the fish-soluble slurry concentration equipment requires subsequent maintenance, cleaning and disassembly, the flange-sealing ring structure is often used for the sealing of the current fish-soluble slurry concentration equipment. However, the flange-sealing ring structure has some defects: first, the rubber sealing ring is in long-term contact with the organic acids, salts and particulate matter in the fish-soluble slurry, and is prone to swelling, embrittlement or wear failure, especially under high temperature conditions; second, the flange bolts rely on manual repeated tightening, and when they are disassembled and reinstalled, micro-leaks are easily caused due to uneven pre-tightening force or misalignment of the sealing surface. In addition, the disassembly of the flange-sealing ring structure is time-consuming, and the residual slurry is prone to solidification and scaling on the sealing surface, further exacerbating the risk of sealing failure and seriously restricting the continuous operation efficiency of the equipment.

[0003] In response to the above problems, most of the existing improvement plans focus on upgrading sealing materials, such as using fluororubber instead of nitrile rubber or using snap-on flanges for structural optimization. However, none of them have broken through the core contradiction of "relying on bolt tightening" and "repeated disassembly damaging the sealing surface". Although the snap-on flange shortens the disassembly time, it causes local leakage due to uneven force; after the corrosion resistance of the polymer sealing ring is improved, fatigue cracking caused by frequent extrusion deformation cannot be avoided. In this regard, a fish slurry concentration equipment and a concentration process thereof are proposed. Summary of the Invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a fish slurry concentration device and a concentration process thereof, which solve the problems raised in the background technology.

[0005] The object of the present invention can be achieved by the following technical solution: a fish pulp concentration device, comprising a pretreatment device, an evaporator device, a separation and recovery device, a pipeline valve device and a control system, wherein the pretreatment device is linearly connected to the evaporator device through the pipeline valve device, and the outlet of the evaporator device is connected to the separation and recovery device through a vertical pipeline to complete gas-liquid separation and material recovery. The control system is respectively communicated with the pretreatment device, the evaporator device, the separation and recovery device, and the pipeline valve device to form a continuous concentration closed-loop system driven by thermal energy; a quick-release sealing assembly is provided in the pipeline body of the pipeline valve device, and the quick-release sealing assembly includes a vertical sliding part, a rotating part, a conical sealing part and a roller guide part provided on the sealing part, one end of the rotating part is hinged to the vertical sliding part, and the conical sealing part is provided on the other end of the rotating part, the vertical sliding part slides vertically along the inner wall of the pipeline body, the inner wall of the pipeline body contacts the roller guide part and drives the roller of the roller guide part to slide horizontally, and the roller causes the rotating part to rotate around the hinge point through linkage, driving the side wall of the conical sealing part to rotate and fit the inner wall of the pipeline to form a self-locking seal, thereby achieving zero leakage.

[0006] As a further solution of the present invention, a support block is provided on the pipe body, and the vertical sliding portion is a sliding block, which slides through the support block into the pipe body.

[0007] As a further solution of the present invention, a circular hole is provided on the support block, and the circular hole is communicated with the pipe body. A trapezoidal sealing ring is provided on the sliding block, and the bottom of the trapezoidal sealing ring is fixed on the sliding block, and the top of the trapezoidal sealing ring is in contact with the side wall of the circular hole.

[0008] As a further solution of the present invention, the connection between the waist and the top of the trapezoidal sealing ring is an arc-shaped structure.

[0009] As a further solution of the present invention, the guide portion is a guide rod, a vertical guide rail is provided on the circular hole, a guide block is provided on the top of the trapezoidal sealing ring, and the guide block slides along the vertical guide rail.

[0010] As a further solution of the present invention, the rotating part is a swing rod, and the angle between the swing rod and the vertical direction of the sliding block is 10°-15°.

[0011] As a further embodiment of the present invention, the conical sealing portion includes a truncated cone-shaped protrusion, the swing rod is connected to the center of the bottom surface of the truncated cone-shaped protrusion, and the diameter of the pipe body is larger than the top surface diameter of the truncated cone-shaped protrusion and smaller than the bottom surface diameter of the truncated cone-shaped protrusion.

[0012] As a further solution of the present invention, an elastic ring is sleeved on the truncated cone-shaped protrusion.

[0013] As a further solution of the present invention, the roller guide portion includes a quadrilateral fixed plate arranged on the top surface of the conical protrusion and rollers respectively arranged on the two top corners of the quadrilateral fixed plate away from the conical protrusion. The two rollers are of the same size and are detachably slidably connected to the inner wall of the pipe body.

[0014] A fish pulp concentration process comprises the following steps:

[0015] S1: Pre-treating the fish slurry: The raw fish slurry is fed into the pre-treatment device, and the solid impurities with a particle size larger than 1mm are removed in sequence through a vibrating screen, preheated to 50-70℃ through a plate heat exchanger, and homogenized by a homogenizing pump;

[0016] S2: Evaporation and concentration: The pre-treated fish slurry is transported to the heating chamber of the evaporator device, and saturated steam is introduced through the outer wall of the falling film heat exchange tube bundle to heat the slurry, so that the water of the fish slurry evaporates in the separation chamber to form a concentrated liquid and secondary steam;

[0017] S3: Gas-liquid separation and recovery: The secondary steam at the top of the separation chamber is introduced into the cyclone separator through a vertical pipe for gas-liquid separation. After the entrained droplets are captured, the volatile organic compounds are recovered through the condenser, and the vacuum degree of the system is maintained at -0.08 to -0.06 MPa by a vacuum pump;

[0018] S4: Sealing operation and maintenance. The quick-release sealing assembly of the pipeline valve device can achieve rapid disassembly and sealing of the pipeline connection. When disassembling, slide the vertical sliding part along the inner wall of the pipeline body to drive the roller guide part to move horizontally, driving the conical sealing part to separate from the inner wall of the pipeline and release the self-locking function. When installing, push the sliding block in the opposite direction. The roller guide part drives the conical sealing part to rotate and fit the inner wall of the pipeline to form a zero-leakage seal.

[0019] S5: Control and circulation, the evaporator temperature and system pressure are monitored in real time through the PLC controller of the control system, the steam valve opening is adjusted to stabilize the evaporation temperature within the set value range, and the condensed water is recycled to the boiler for recycling. The concentrated fish slurry is mixed evenly in the stirring tank and then output.

[0020] The beneficial effects of the present invention are:

[0021] The defects of the traditional flange-sealing ring structure are solved by adopting a quick-release sealing assembly. The assembly realizes a self-locking seal that automatically rotates horizontally to fit the inner wall of the pipe after vertical insertion through the linkage design of the vertical sliding part, the rotating part, the conical sealing part and the roller guide part, abandoning the bolt fastening method. The self-locking mechanism applies uniform pressure through the radial component of the conical sealing part to avoid leakage caused by uneven pre-tightening force; the roller guide part converts sliding friction into rolling friction, reduces disassembly resistance, and reduces damage to the sealing surface; the combined design of the trapezoidal sealing ring and the elastic ring can adapt to high-temperature expansion and corrosive environments, alleviate the effects of particle erosion and thermal stress, eliminate the risk of damage to the sealing surface due to repeated disassembly, and simplify the operating process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic structural diagram of the quick-release sealing assembly of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the roller guide portion of the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the trapezoidal sealing ring of the present invention;

[0027] Figure 5 The figure is a flow chart of the fish pulp concentration process of the present invention.

[0028] Description of main component symbols:

[0029] In the figure: 1. quick-release sealing assembly; 11. vertical sliding portion; 12. rotating portion; 13. conical sealing portion; 14. roller guide portion; 141. quadrilateral fixing plate; 142. roller; 2. pipe body; 3. trapezoidal sealing ring; 4. guide block. DETAILED DESCRIPTION

[0030] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0031] See also Figure 1 - Figure 5The present embodiment provides a fish pulp concentration device, including a pretreatment device, an evaporator device, a separation and recovery device, a pipeline valve device and a control system. The pretreatment device is linearly connected to the evaporator device through the pipeline valve device, and the outlet of the evaporator device is connected to the separation and recovery device through a vertical pipeline to complete gas-liquid separation and material recovery. The control system is respectively communicated with the pretreatment device, the evaporator device, the separation and recovery device, and the pipeline valve device to form a continuous concentration closed-loop system driven by thermal energy; a quick-release sealing component 1 is provided in the pipeline body 2 of the pipeline valve device, and the quick-release sealing component Component 1 includes a vertical sliding portion 11, a rotating portion 12, a conical sealing portion 13 and a roller guide portion 14 arranged on the sealing portion. One end of the rotating portion 12 is hinged to the vertical sliding portion 11, and the conical sealing portion 13 is arranged on the other end of the rotating portion 12. The vertical sliding portion 11 slides vertically along the inner wall of the pipe body 2. The inner wall of the pipe body 2 contacts the roller guide portion 14 and drives the roller 142 of the roller guide portion 14 to slide horizontally. The roller 142 causes the rotating portion 12 to rotate around the hinge point through linkage, driving the side wall of the conical sealing portion 13 to rotate and fit the inner wall of the pipe to form a self-locking seal, thereby achieving zero leakage.

[0032] One thing that needs to be explained is that the fish slurry first enters the flash tank, where part of the water is evaporated by reducing the pressure. Then, the fish slurry is sent to the concentration tank, where the water is further evaporated by heating to increase the concentration of the fish slurry. The evaporated water is cooled and condensed by the air cooler, and the condensed water enters the water collection tank. The water in the water collection tank is recovered by the condensate recovery machine and transported to the boiler for reuse. The concentrated fish slurry is further mixed by the stirring tank to ensure uniform concentration. The mechanical pump is used to circulate and transport the fish slurry to ensure the continuity of the entire concentration process. The processing device is used to filter, heat and homogenize the raw fish slurry, which includes a vibrating screen, a plate heat exchanger and a homogenizing pump connected in sequence. The vibrating screen is configured to remove solid impurities with a particle size greater than 1mm. The plate heat exchanger preheats the fish slurry to 50-70℃ through steam circulation. The homogenizing pump homogenizes the viscosity of the fish slurry through pressure regulation; the evaporator device is connected to the outlet of the pretreatment device and is used to evaporate water by heat energy to concentrate the fish slurry. It includes a heating chamber and a separation chamber. The heating chamber is equipped with a falling film heat exchange tube bundle, and a 0.3-0 .5MPa saturated steam, a secondary steam outlet is provided at the top of the separation chamber, and the bottom is connected to the concentrate discharge pipe through a conical guide structure; a separation and recovery device is connected to the secondary steam outlet of the evaporator system, including a cyclone separator, a condenser and a vacuum pump. The cyclone separator is connected to the top of the separation chamber through a vertical riser to separate gas and liquid and capture entrained droplets. The condenser is connected to the cyclone separator outlet through a U-shaped buffer tube to recover volatile organic compounds. The vacuum pump is configured to maintain the system vacuum degree at -0.08 to -0.06MPa; pipeline valve device , connecting the pretreatment system, evaporator system and separation and recovery device. The inner wall of the pipeline is coated with a silicon carbide wear-resistant layer. The key connection nodes adopt a quick-release self-tightening sealing structure. The quick-release sealing structure includes a tongue and groove guide surface and a magnetic positioning module, which achieves zero leakage through conical self-locking; the control system includes a PLC controller, a temperature sensor, a pressure sensor and an electric actuator. The temperature sensor is embedded in the wall of the evaporator heat exchange tube to monitor the temperature deviation in real time and feed it back to the PLC. The electric actuator jointly adjusts the steam valve opening to stabilize the evaporation temperature within an error range of ±2℃.

[0033] At present, fish slurry concentration equipment often needs to be cleaned and maintained during operation due to the high viscosity and high solid content of the material. However, the flange-sealing ring structure currently used has problems such as easy damage of the rubber sealing ring, uneven bolt tightening, and damage to the sealing surface during disassembly, which limits the operating efficiency of the equipment. Although existing improvement plans try to use more corrosion-resistant sealing materials or optimize the structure, they have not fundamentally solved the problem of sealing failure caused by bolt tightening and repeated disassembly.

[0034] In order to solve the above problems, in this embodiment, the defects of the traditional flange-sealing ring structure are solved by adopting a quick-release sealing assembly 1. The assembly realizes a self-locking seal that automatically rotates horizontally to fit the inner wall of the pipe after vertical insertion through the linkage design of the vertical sliding part 11, the rotating part 12, the conical sealing part 13 and the roller guide part 14, and abandons the bolt fastening method. The self-locking mechanism applies uniform pressure through the radial component of the conical sealing part 13 to avoid leakage caused by uneven pre-tightening force; the roller guide part 14 converts sliding friction into rolling friction, reduces disassembly resistance, and reduces damage to the sealing surface; the combined design of the trapezoidal sealing ring 3 and the elastic ring can adapt to high-temperature expansion and corrosive environments, alleviate the effects of particle erosion and thermal stress, eliminate the risk of damage to the sealing surface due to repeated disassembly, and simplify the operation process.

[0035] Since the fish slurry concentration equipment has high material viscosity and high solid content, it is necessary to frequently disassemble the pipeline for cleaning and maintenance, and the cooperation design of the support block and the sliding block can realize vertical sliding guidance. In order to avoid deviation during disassembly, in one embodiment, a support block is provided on the pipeline body 2, and the vertical sliding portion 11 is a sliding block. The sliding block slides through the support block to the pipeline body 2. A circular hole is opened on the support block, and the circular hole is communicated with the pipeline body 2. A trapezoidal sealing ring 3 is fixedly sleeved on the sliding block. The bottom of the trapezoidal sealing ring 3 is fixedly set on the sliding block, and the top of the trapezoidal sealing ring 3 is in contact with the circular hole. The side wall fits together, and the connection between the waist and the top of the trapezoidal sealing ring 3 is an arc structure. The trapezoidal sealing ring 3 designed here can firstly facilitate the sliding block to slide into the inside of the pipe body 2 or slide out of the pipe body 2, and secondly, it can also ensure the sealing. The trapezoidal sealing ring 3 is fluororubber, and the circular hole of the support block cooperates with the sliding block to ensure the vertical movement accuracy and avoid dislocation of the sealing surface. The top of the trapezoidal sealing ring 3 fits together with the hole wall, and absorbs thermal expansion and deformation through the arc-shaped waist to adapt to high temperature working conditions. The sliding block slides vertically along the support block, and no bolts are required to tighten, which shortens the disassembly time.

[0036] In order to make the trapezoidal sealing ring 3 slide only in the vertical direction without rotating and improve the sealing performance, in one embodiment, the guide portion is a guide rod, a vertical guide rail is provided on the circular hole, and a guide block 4 is provided on the top of the trapezoidal sealing ring 3. The guide block 4 slides along the vertical guide rail, wherein the vertical guide rail is U-shaped. When the trapezoidal sealing ring 3 slides vertically downward, it just slides to the position shown in FIG. Figure 1state, at this time the guide block 4 is just at the bottom of the U-shape of the vertical guide rail. When the trapezoidal sealing ring 3 slides to the bottom of the U-shaped guide rail, it can ensure that the sealing ring is in closer contact with the sealing surface, thereby improving the sealing effect. In addition, the surface of the guide rail is hard chrome-plated with Ra≤0.4μm, the guide block 4 is made of wear-resistant nylon with a friction coefficient of μ=0.1, and the cooperation between the vertical guide rail and the guide block 4 can limit the rotational freedom of the sliding block, ensuring that the sealing ring is always facing the center of the pipeline. The combination of the chrome-plated guide rail and the nylon guide block 4 reduces friction and extends the service life of the sealing ring. In addition, the guide rail can be disassembled and replaced to avoid the overall structure being scrapped due to wear.

[0037] Considering that the sealing structure is prone to leakage due to contact stress concentration under high pressure, in one embodiment, the rotating part 12 is a swing rod, and there are two swing rods, which are symmetrically arranged on the conical sealing part 13, such as Figure 2 As shown, the angle between the vertical direction of the swing arm and the sliding block is 10°-15°. The inclination angle of 10°-15° enables the conical sealing part 13 to generate a radial component of force when the sliding block is pressed down, and the contact pressure is increased. At the same time, the swing arm can also drive the conical sealing part 13 to form a seal with the pipe body 2, which is also convenient for disassembly. The inclination design of the swing arm and the sliding block makes the contact stress distribution of the conical sealing part 13 more uniform during the contact process, which helps to reduce the contact stress concentration phenomenon, thereby reducing the leakage problem caused by stress concentration. The two symmetrically arranged swing arms help to improve the stability of the entire sealing structure. The angle between the swing arm and the sliding block is designed to be 10°-15°, which can enable the conical sealing part 13 to automatically adjust the contact position with the pipe body 2 when the sliding block is pressed down, thereby achieving precise sealing. This design optimizes the sealing structure and makes it more adaptable to different usage environments and pressure conditions.

[0038] Since a single conical seal is prone to instantaneous leakage due to vibration under dynamic working conditions, in order to provide a secondary seal and enhance system reliability, in one embodiment, the conical sealing portion 13 includes a truncated cone-shaped protrusion, the swing rod is connected to the center of the bottom surface of the truncated cone-shaped protrusion, the diameter of the pipe body 2 is larger than the top surface diameter of the truncated cone-shaped protrusion and smaller than the bottom surface diameter of the truncated cone-shaped protrusion, and an elastic ring is sleeved on the truncated cone-shaped protrusion. The elastic ring is also truncated cone-shaped, but the elastic ring is smaller than the truncated cone-shaped protrusion, which can ensure that the elastic ring is sleeved on the truncated cone-shaped protrusion and will not fall off. Figure 2 or Figure 3 The truncated cone-shaped protrusion shown in the figure can be better sealed with the pipe body 2 after the elastic ring is put on. Figure 1In order to make it easier to see the truncated cone-shaped protrusion, the elastic ring is not drawn in the figure. The position of the elastic ring can be clearly known through the above description. The elastic ring is made of hydrogenated nitrile rubber. The conical sealing portion 13 is responsible for static sealing, and the elastic ring responds to dynamic vibration. The hydrogenated nitrile rubber can withstand organic acids and salts in the fish slurry, thereby increasing its service life.

[0039] It is worth mentioning that the quick-release sealing assembly 1 is provided in the pipeline body 2 of the pipeline valve device. After each concentration of the fish slurry, in order to ensure the subsequent concentration efficiency, the pipeline body 2 is often cleaned and maintained. The sliding block is externally connected to an electric telescopic rod for vertical movement, and the electric telescopic rod is communicated with the control system. However, frequent disassembly will inevitably cause friction between the quick-release sealing assembly 1 and the pipeline body 2, and long-term use will damage the pipeline. In order to avoid this problem, in one embodiment, the roller guide part 14 includes a quadrilateral fixing plate 141 provided on the top surface of the truncated cone-shaped protrusion and quadrilateral fixing plates 141 respectively provided at positions away from the truncated cone-shaped protrusion. The rollers 142 on the two top corners of the fixed plate 141 are of the same size. The two rollers 142 are detachably slidably connected to the inner wall of the pipe body 2. The design of the rollers 142 can ensure that the friction between the quick-release sealing assembly 1 and the bottom of the inner wall of the pipe is small, thereby avoiding damage to the pipe. On the other hand, it is also convenient for the truncated cone-shaped protrusion to be pressed tightly against the pipe body 2. Two rollers 142 must be used here, because when the truncated cone-shaped protrusion is taken out and just inserted, two rollers 142 are required to cooperate to ensure that the friction with the bottom of the inner wall of the pipe is rolling friction, thereby ensuring that the friction is small.

[0040] A fish pulp concentration process comprises the following steps:

[0041] S1: Pre-treating the fish slurry: The raw fish slurry is fed into the pre-treatment device, where it passes through a vibrating screen to remove solid impurities larger than 1mm in size, is preheated to 50-70°C via a plate heat exchanger, and is homogenized by a homogenizing pump. Removing large particles through the vibrating screen improves the purity of the raw material, thereby ensuring the quality of the final product. The homogenizing pump treatment reduces the viscosity of the fish slurry, improving its fluidity and heat transfer efficiency in subsequent processes.

[0042] S2: Evaporation and concentration: The pre-treated fish slurry is transported to the heating chamber of the evaporator device. Saturated steam is introduced through the outer wall of the falling film heat exchange tube bundle for heating. The water of the fish slurry evaporates in the separation chamber to form concentrated liquid and secondary steam. The falling film heat exchange tube bundle is used for evaporation. This method has the characteristics of high heat transfer efficiency and low heat loss, which helps save energy.

[0043] S3: Gas-liquid separation and recovery: The secondary steam at the top of the separation chamber is introduced into a cyclone separator through a vertical pipe for gas-liquid separation. After the entrained liquid droplets are captured, the volatile organic compounds are recovered through a condenser. The vacuum degree of the system is maintained at -0.08 to -0.06 MPa by a vacuum pump. The recycling of secondary steam further improves energy utilization efficiency and reduces environmental pollution.

[0044] S4: Sealing operation and maintenance. The quick-release sealing assembly 1 of the pipeline valve device can achieve rapid disassembly and sealing of the pipeline connection. When disassembling, the vertical sliding part 11 is slid along the inner wall of the pipeline body 2, driving the roller guide part 14 to move horizontally, driving the conical sealing part 13 to separate from the inner wall of the pipeline and release the self-locking. When installing, the sliding block is pushed in the opposite direction, and the conical sealing part 13 is rotated to fit the inner wall of the pipeline through the roller guide part 14 to form a zero-leakage seal. The quick-release sealing assembly 1 makes the disassembly and installation of the pipeline connection simpler and faster, reduces the downtime for maintenance, and improves production efficiency. The zero-leakage sealing design ensures safety and hygiene during the production process.

[0045] S5: Control and circulation. The PLC controller of the control system monitors the evaporator temperature and system pressure in real time, adjusts the steam valve opening to stabilize the evaporation temperature within the set value range, and recycles the condensed water to the boiler for recycling. The concentrated fish slurry is mixed evenly in the stirring tank and then output. The PLC controller can realize real-time monitoring and control, ensuring the stability of the evaporation process and the consistency of the product. By adjusting the steam valve opening to stabilize the evaporation temperature, the product quality is improved while avoiding energy waste caused by overheating.

[0046] The working principle and workflow of the present invention:

[0047] The raw fish slurry is screened to remove solid impurities >1mm, preheated to 50-70℃ by a plate heat exchanger, and homogenized by a homogenizing pump to reduce the viscosity to adapt to the subsequent evaporation process. The pretreated liquid enters the evaporator heating chamber, and 0.3-0.5MPa saturated steam is introduced into the outer wall of the falling film heat exchange tube bundle. The fish slurry forms a thin film in the separation chamber to quickly evaporate water, generating concentrated liquid and secondary steam. The secondary steam enters the cyclone separator through a vertical pipe. After separating the entrained droplets, the condenser recovers volatile organic compounds. The vacuum pump maintains the vacuum degree of the system to ensure efficient evaporation. The pipeline valve device adopts a quick-release sealing component 1. The sliding block passes through the support block and slides vertically along the inner wall of the pipe. A trapezoidal sealing ring 3 is installed. Its arc-shaped waist can absorb thermal expansion and deformation. The top fits the side wall of the circular hole of the support block to ensure vertical guidance. The swing rod is hinged to the sliding block and tilted 1 0°-15°, the vertical movement is converted into the movement of the conical sealing part 13 through the lever effect, the sealing pressure is enhanced, the frustum-shaped protrusion is interference fit with the inner wall of the pipe, and an elastic ring is set on the surface to achieve sealing. The quadrilateral fixing plate 141 is welded to the top of the frustum, and polyurethane rollers 142 are installed at both ends to convert sliding friction into rolling friction, reduce the wear of the inner wall of the pipe, and reduce the disassembly resistance. When the sliding block is pressed down, the roller 142 rolls along the inner wall of the pipe, and the linked swing rod deflects, and the conical sealing part 13 expands radially and fits against the inner wall; when disassembling, it slides in the opposite direction, and the conical sealing part 13 shrinks and disengages, realizing quick disassembly and assembly. No bolt tightening is required throughout the process, and zero leakage is achieved. The PLC controller monitors the evaporator temperature and system pressure in real time, adjusts the steam valve opening through the PID algorithm, stabilizes the evaporation temperature, and the condensed water is recycled to the boiler for recycling. The concentrated liquid is homogenized in the mixing tank and then output.

[0048] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A fish pulp concentration device, characterized in that: The invention comprises a pretreatment device, an evaporator device, a separation and recovery device, a pipeline valve device and a control system. The pretreatment device is linearly connected to the evaporator device through the pipeline valve device. The outlet of the evaporator device is connected to the separation and recovery device through a vertical pipeline to complete gas-liquid separation and material recovery. The control system is respectively communicated with the pretreatment device, the evaporator device, the separation and recovery device and the pipeline valve device to form a continuous concentration closed-loop system driven by thermal energy. A quick-release sealing assembly is provided in the pipeline body of the pipeline valve device. The quick-release sealing assembly comprises a vertical sliding part, a rotating part, a conical sealing part and a roller guide part arranged on the sealing part. One end of the rotating part is hinged to the vertical sliding part, and the conical sealing part is arranged on the other end of the rotating part. The vertical sliding part slides vertically along the inner wall of the pipeline body. The inner wall of the pipeline body contacts the roller guide part and drives the roller of the roller guide part to slide horizontally. The roller causes the rotating part to rotate around the hinge point through linkage, driving the side wall of the conical sealing part to rotate and fit the inner wall of the pipeline to form a self-locking seal, thereby achieving zero leakage.

2. A fish slurry concentration device according to claim 1, characterized in that: A support block is provided on the pipe body, and the vertical sliding portion is a sliding block. The sliding block slides through the support block into the pipe body.

3. A fish slurry concentration device according to claim 2, characterized in that: A circular hole is provided on the support block, which is communicated with the pipeline body. A trapezoidal sealing ring is sleeved on the sliding block, the bottom of the trapezoidal sealing ring is fixed on the sliding block, and the top of the trapezoidal sealing ring is in contact with the side wall of the circular hole.

4. The fish slurry concentration device according to claim 3, characterized in that: The connection between the waist and the top of the trapezoidal sealing ring is an arc structure.

5. The fish slurry concentration device according to claim 3, characterized in that: The guide portion is a guide rod, a vertical guide rail is provided on the circular hole, a guide block is provided on the top of the trapezoidal sealing ring, and the guide block slides along the vertical guide rail.

6. The fish slurry concentration device according to claim 2, characterized in that: The rotating part is a swing rod, and the angle between the swing rod and the vertical direction of the sliding block is 10°-15°.

7. The fish slurry concentration device according to claim 2, characterized in that: The conical sealing portion includes a truncated cone-shaped protrusion, the swing rod is connected to the center of the bottom surface of the truncated cone-shaped protrusion, and the diameter of the pipe body is larger than the top surface diameter of the truncated cone-shaped protrusion and smaller than the bottom surface diameter of the truncated cone-shaped protrusion.

8. The fish slurry concentration device according to claim 7, characterized in that: An elastic ring is sleeved on the truncated cone-shaped protrusion.

9. The fish slurry concentration device according to claim 7, characterized in that: The roller guide portion includes a quadrilateral fixing plate arranged on the top surface of the truncated cone-shaped protrusion and rollers respectively arranged on the two top corners of the quadrilateral fixing plate away from the truncated cone-shaped protrusion. The two rollers are of the same size and are detachably slidably connected to the inner wall of the pipe body.

10. A fish slurry concentration process, based on the fish slurry concentration equipment according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Pre-treating the fish slurry: The raw fish slurry is fed into the pre-treatment device, and the solid impurities with a particle size larger than 1mm are removed in sequence through a vibrating screen, preheated to 50-70℃ through a plate heat exchanger, and homogenized by a homogenizing pump; S2: Evaporation and concentration: The pre-treated fish slurry is transported to the heating chamber of the evaporator device, and saturated steam is introduced through the outer wall of the falling film heat exchange tube bundle to heat the slurry, so that the water of the fish slurry evaporates in the separation chamber to form a concentrated liquid and secondary steam; S3: Gas-liquid separation and recovery: The secondary steam at the top of the separation chamber is introduced into the cyclone separator through a vertical pipe for gas-liquid separation. After the entrained droplets are captured, the volatile organic compounds are recovered through the condenser, and the vacuum degree of the system is maintained at -0.08 to -0.06 MPa by a vacuum pump; S4: Sealing operation and maintenance. The quick-release sealing assembly of the pipeline valve device can achieve rapid disassembly and sealing of the pipeline connection. When disassembling, slide the vertical sliding part along the inner wall of the pipeline body to drive the roller guide part to move horizontally, driving the conical sealing part to separate from the inner wall of the pipeline and release the self-locking function. When installing, push the sliding block in the opposite direction. The roller guide part drives the conical sealing part to rotate and fit the inner wall of the pipeline to form a zero-leakage seal. S5: Control and circulation, the evaporator temperature and system pressure are monitored in real time through the PLC controller of the control system, the steam valve opening is adjusted to stabilize the evaporation temperature within the set value range, and the condensed water is recycled to the boiler for recycling. The concentrated fish slurry is mixed evenly in the stirring tank and then output.

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