Centrifugal machine for obtaining polypeptide liquid from low-value deep-sea fish enzymatic hydrolysate
By adopting the design of bottom in and top out in the centrifuge and the improved inner barrel structure, the problems of low efficiency and impure separation of the existing centrifuge are solved, and efficient and accurate separation and automatic cleaning of the enzymatic solution are achieved, improving the overall performance of the equipment.
Patent Information
- Application Number
- CN202411730388.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-02-25
AI Technical Summary
Existing centrifuges are inefficient when separating the enzymatic solution of fish bones and the isolated supernatant is not pure, and solid precipitates are easily retained inside the equipment, which requires frequent cleaning.
The design idea of bottom in and top out is adopted, combined with the improved inner barrel structure and precipitate discharge mechanism, the solid-liquid separation of the enzymatic solution is achieved, and the separation accuracy and efficiency are improved through the spiral plate and disc structure.
It improves the separation efficiency and accuracy of the enzymatic lysate, reduces the residual amount of precipitates, realizes the automatic cleaning function of the equipment, and significantly improves the efficiency of the equipment and the purity of the product.
Smart Images
Figure CN119500419A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of centrifugal equipment, in particular to a centrifuge for obtaining polypeptide liquid from low-value deep-sea fish enzymatic hydrolysate. Background Art
[0002] A large number of by-products are produced during the processing of aquatic products, such as fish skin, fish minced meat, fish heads, fish viscera, fish bones, etc. Among them, fish bones account for the largest proportion. In order to increase the utilization value of by-products, there are currently many ways to deeply process fish bones: First, it is processed into fish bone powder, which is made by removing the fishy smell, deodorizing, drying, and crushing the fish bones; Second, the collagen polypeptide is prepared. The collagen content in fish bones is relatively high. The collagen is extracted and enzymatically hydrolyzed to obtain the collagen polypeptide. Third, the preparation of calcium preparations. Fish bones are rich in calcium. Using the active calcium in fish bones as a calcium supplement for the human body is also an important way to comprehensively utilize fish bones. Among the three deep processing methods mentioned above, the nutrients in the processed fish bone powder are not easily absorbed, resulting in a waste of resources. Currently, the preparation of collagen peptides and calcium preparations can better give full play to the product value of fish bones.
[0003] The steps of preparing polypeptides from fish bones are as follows: first, the fish bones are crushed and granulated using a pulverizer, the fish bone particles are added with water and subjected to steam explosion to obtain a suspension slurry, the suspension slurry is enzymatically hydrolyzed to obtain an enzymatic hydrolyzate, and the enzymatic hydrolyzate is separated into a supernatant and a precipitate using a centrifuge, the precipitate is fish bone debris, and the supernatant is the raw material of the collagen polypeptide, and finally the collagen polypeptide powder is prepared through processes such as concentration and drying.
[0004] In the prior art, there are two commonly used centrifuges: butterfly centrifuge and tubular centrifuge. The butterfly centrifuge needs to stop the drum regularly during separation to discharge the sediment and then centrifuge again, which is inefficient. Although the tubular centrifuge can discharge the sediment during separation, the supernatant after separation is not pure and still contains a small amount of fish bone debris. At the same time, after use, both of the above centrifuges will have solid sediments left inside, and the inside of the centrifuge needs to be cleaned frequently. Summary of the invention
[0005] The present invention provides a centrifuge for obtaining polypeptide liquid from low-value deep-sea fish hydrolysate. The centrifuge adopts a bottom-in and top-out design concept to achieve dynamic solid-liquid separation of the hydrolysate. At the same time, the structure of the inner barrel is improved, and a sediment discharge mechanism is provided to quickly discharge the separated sediment, thereby reducing the residual amount of sediment inside the centrifuge.
[0006] To achieve the above object, the present invention provides the following technical solution: a centrifuge for obtaining polypeptide liquid from low-value deep-sea fish hydrolysate, comprising a support platform, a centrifugal mechanism, a driving mechanism and a sediment discharge mechanism; The centrifugal mechanism includes a barrel body, a supernatant discharge pipe, and an enzymatic solution injection pipe. The barrel body includes an outer barrel body and an inner barrel body. Four legs are arranged at the lower end of the outer barrel body, and the legs are fixed to the upper surface of the support platform. A sediment discharge pipe is arranged at the lower end of the outer barrel body. The inner barrel body is rotatably connected in the outer barrel body, and the upper end of the inner barrel body passes through the outer barrel body. The driving mechanism includes a column, a motor 1, a transmission wheel 1 and a transmission wheel 2. The lower end of the column is fixedly connected to the support platform by a flange, a motor mounting seat is arranged on the upper end of the column, the motor 1 is fixedly connected to the motor mounting seat, the transmission wheel 1 is coaxially fixedly connected to the output shaft of the motor 1, the transmission wheel 2 is coaxially fixedly connected to the upper end of the inner barrel body, the transmission wheel 2 is located above the outer barrel body, and the transmission wheel 1 and the transmission wheel 2 are connected by a belt or chain transmission.
[0007] Furthermore, an inspection plate and a cleaning pipe are provided on the side of the outer barrel.
[0008] Furthermore, a support seat is provided at the inner bottom of the outer barrel body, and a plurality of sediment discharge holes are opened on the lower side surface of the support seat, the lower end of the inner barrel body is rotatably connected to the support seat, and the upper end of the inner barrel body is sealed and rotatably connected to the outer barrel body, and the internal space of the inner barrel body is divided into a separation bin located at the upper part and a sediment conveying bin located at the lower part, and the cross-section of the sediment conveying bin decreases successively in a top-down direction, and a sediment temporary storage cavity is formed between the lower part of the inner barrel body and the outer barrel body, the cleaning pipe and the sediment discharge pipe are connected to the sediment temporary storage cavity, and the sediment discharge hole connects the lower end opening of the inner barrel body with the sediment temporary storage cavity.
[0009] Furthermore, the upper part of the inner barrel body is connected to the inner wall of the outer barrel body through an annular slide rail and an annular slider, wherein the annular slide rail is fixed to the outer wall of the inner barrel body, and the annular slider is fixed to the inner wall of the outer barrel body. The annular slide rail and the annular slider are slidably matched, a roller is arranged in the annular slide rail, and the plane where the annular slider contacts the roller is an arc-shaped design.
[0010] Furthermore, the supernatant discharge pipe is arranged in a horizontal direction, the tail end of the supernatant discharge pipe is connected to a temporary storage box, the lower end of the temporary storage box is connected to a support pipe, the lower end of the support pipe penetrates the inner barrel body and then extends into the inner barrel body, the support pipe is rotatably connected to the inner barrel body, a positioning seat is sleeved and fixed on the outer side of the lower end of the support pipe, the lower end face of the positioning seat is fixed with an assembly pipe, a plurality of long strip liquid outlet holes are arranged on the outer periphery of the assembly pipe, an assembly strip plate is arranged between two adjacent long strip liquid outlet holes, and the assembly strip plate is arranged along The axis of the assembly tube extends, and the lower end of the assembly tube is fixed with a limit seat by bolts, and the upper surface of the limit seat is provided with a plurality of first positioning grooves adapted to the assembly strip, and the outer side of the assembly tube is sleeved with a plurality of discs, and the discs are high in the middle and low at the edges, and an annular spacer is provided at the upper end of the disc, and a plurality of second positioning grooves adapted to the assembly strip are provided on the inner side of the annular spacer, and a plurality of avoidance grooves are opened from top to bottom on the upper surface of the annular spacer, and the position of the avoidance groove corresponds to the long strip liquid outlet hole.
[0011] Furthermore, the lower end of the enzymolysis solution injection tube passes through the temporary storage box, the support tube, the assembly tube and the limit seat in sequence and then extends into the separation chamber of the inner barrel body. The enzymolysis solution injection tube is fixedly connected to the temporary storage box. A supernatant liquid passage gap is preset between the support tube, the positioning seat, the assembly tube and the enzymolysis solution injection tube. The supernatant liquid passes through the side of the gap and is connected to the internal space of the inner barrel body through the long liquid outlet hole and the avoidance groove. The upper end of the supernatant liquid passes through the gap and is connected to the internal space of the temporary storage box; the limit seat sealing sleeve is arranged on the outside of the enzymolysis solution injection tube, so that the lower end of the supernatant liquid passage gap is sealed.
[0012] Furthermore, a protective cover is fixedly connected to the upper end of the motor mounting seat, the transmission wheel 1 and the transmission wheel 2 are located in the protective cover, and the temporary storage box is fixedly connected to the protective cover.
[0013] Furthermore, the sediment discharge mechanism includes a drive shaft and a second motor. The upper end of the drive shaft passes through the outer barrel body and the inner barrel body and then extends into the inner barrel body. The drive shaft is sealed and rotatably connected to the outer barrel body and the inner barrel body. A spiral plate is provided at the position of the drive shaft located in the inner barrel body. The spiral plate matches the shape of the sediment conveying bin. The distance between the outer edge of the spiral plate and the inner wall of the inner barrel body is 0.2-0.5mm. The output shaft of the second motor is coaxially fixed to the lower end of the drive shaft. The second motor is located below the outer barrel body.
[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The centrifuge for obtaining polypeptide liquid from low-value deep-sea fish hydrolysate disclosed in the present invention, the hydrolysate enters the separation chamber of the inner barrel body through the hydrolysate injection pipe, and as the inner barrel body rotates circumferentially, the heavy sediment is thrown around the inner barrel body and slides down from the barrel wall of the inner barrel body to the sediment delivery chamber, and the supernatant and fine fish bone debris enter between the discs, and a downwardly inclined channel is formed between the multiple discs, which is conducive to the adhesion and downward sliding of the fine fish bone debris. In this process, the multiple discs play a role in blocking the fish bone debris, and the supernatant enters the preset supernatant passage gap between the support tube and the hydrolysate injection pipe after passing through the avoidance groove and the long strip liquid outlet hole, and then enters the temporary storage box, and finally discharged from the supernatant discharge pipe; Driven by the spiral plate, the sediment in the sediment transport bin enters the outer barrel through the lower opening of the inner barrel and the sediment discharge hole of the support seat, and is finally discharged from the sediment discharge pipe. In this process, the volume of the sediment discharge channel formed between the spiral plate and the inner barrel is continuously reduced from top to bottom, and the liquid in the sediment is continuously squeezed. The liquid produced in the squeezing process flows out from the gap between the spiral plate and the inner barrel and is still used in the supernatant separation process, thereby improving the separation accuracy of the equipment; From the above, it can be seen that according to the technical solution disclosed in the present invention, the separation of the supernatant and the precipitate, the discharge of the supernatant and the discharge of the precipitate can all be carried out simultaneously, and the content of fish bone debris in the supernatant is greatly reduced, and the separation efficiency and accuracy of the enzymatic hydrolyzate are further improved.
[0015] 2. When the separation operation is completed, the cleaning water is injected through the cleaning pipe and the enzymatic solution injection pipe. The motor drives the inner barrel to rotate circumferentially, which can not only clean the inner wall of the inner barrel, but also the inner wall of the outer barrel and the outer wall of the inner barrel, realizing the automatic cleaning function of the centrifuge. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the structure of a centrifuge for obtaining polypeptide liquid from low-value deep-sea fish hydrolysate in the embodiment; Figure 2 This is a cross-sectional view of a centrifuge for obtaining polypeptide liquid from low-value deep-sea fish enzymatic hydrolysate in the embodiment; Figure 3 for Figure 2 The enlarged view of the area marked with number A; Figure 4 It is a structural schematic diagram of the positioning seat and the assembly tube in the embodiment; Figure 5 is a schematic diagram of the structure of the disc in the embodiment; Figure 6 It is a schematic diagram of the limit seat structure in the embodiment; Figure 7 Schematic diagram of the structure of the supernatant passing through the gap in the embodiment.
[0017] In the figure: 100 - support platform; 201-supernatant discharge pipe, 202-enzyme solution injection pipe, 203-outer barrel, 204-inner barrel, 205-supporting foot, 206-cleaning pipe, 207-sediment discharge pipe, 208-support seat, 209-sediment discharge hole, 210-temporary storage box, 211-support tube, 212-positioning seat, 213-assembly tube, 214-long strip liquid outlet hole, 215-assembly strip plate, 216-limiting seat, 217-first positioning groove, 218-disc, 219-annular spacing seat, 220-second positioning groove, 221-avoidance groove, 222-supernatant passing gap, 223-sediment temporary storage chamber, 224-inspection plate; 301-column, 302-motor 1, 303-transmission wheel 1, 304-transmission wheel 2, 305-motor mounting seat, 306-protective cover; 401-driving shaft, 402-motor 2, 403-spiral plate. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0019] See also Figure 1-7 This embodiment provides a centrifuge for obtaining polypeptide liquid from low-value deep-sea fish hydrolysate, including a support platform 100, a centrifugal mechanism, a driving mechanism and a sediment discharge mechanism.
[0020] The centrifugal mechanism includes a barrel, a supernatant discharge pipe 201 and an enzymatic solution injection pipe 202 .
[0021] The barrel body comprises an outer barrel body 203 and an inner barrel body 204. Four legs 205 are arranged at the lower end of the outer barrel body 203, and the legs 205 are fixed on the upper surface of the support platform 100. An inspection plate 224 and a cleaning pipe 206 are arranged on the side of the outer barrel body 203. A sediment discharge pipe 207 is arranged at the lower end of the outer barrel body 203. A support seat 208 is arranged at the inner bottom of the outer barrel body 203, and a plurality of sediment discharge holes 209 are opened on the lower side of the support seat 208. The inner barrel body 204 is located inside the outer barrel body 203, and the lower end of the inner barrel body 204 is rotatably connected to the support seat 208. The upper end of the inner barrel body 204 is connected to the outer barrel body 203. 203 penetrates through, the upper end of the inner barrel body 204 is sealed and rotatably connected with the outer barrel body 203, the upper part of the inner barrel body 204 is connected with the inner wall of the outer barrel body 203 through an annular slide rail and an annular slider, wherein the annular slide rail is fixed to the outer wall of the inner barrel body 204, the annular slider is fixed to the inner wall of the outer barrel body 203, the annular slide rail and the annular slider are slidably matched, preferably a roller is arranged in the annular slide rail, and the plane where the annular slider contacts the roller is an arc design; the internal space of the inner barrel body 204 is divided into a separation bin located at the upper part and a sediment transport bin located at the lower part, and the cross section of the sediment transport bin decreases in sequence from top to bottom. A sediment temporary storage chamber 223 is formed between the lower part of the inner barrel body 204 and the outer barrel body 203, and the cleaning pipe 206 and the sediment discharge pipe 207 are connected to the sediment temporary storage chamber 223. The sediment discharge hole 209 connects the lower end opening of the inner barrel body 204 with the sediment temporary storage chamber 223 .
[0022] The supernatant discharge pipe 201 is arranged in the horizontal direction, and the tail end of the supernatant discharge pipe 201 is connected to a temporary storage box 210, and the lower end of the temporary storage box 210 is connected to a support pipe 211. The lower end of the support pipe 211 penetrates the inner barrel body 204 and then extends into the inner barrel body 204. The support pipe 211 is rotatably connected to the inner barrel body 204, and a positioning seat 212 is sleeved and fixed on the outer side of the lower end of the support pipe 211. The lower end surface of the positioning seat 212 is fixed with an assembly pipe 213. A plurality of long strip liquid outlet holes 214 are arranged on the outer periphery of the assembly pipe 213, and an assembly strip 215 is arranged between two adjacent long strip liquid outlet holes 214. The assembly strip 215 extends along the axis of the assembly pipe 213, and the lower end of the assembly pipe 213 is fixed to a limiting seat 216 by bolts, and a plurality of first positioning grooves 217 adapted to the assembly strip 215 are arranged on the upper surface of the limiting seat 216. The outer side of the assembly tube 213 is sleeved with a plurality of discs 218, wherein the discs 218 are higher in the middle and lower at the edges, an annular spacer 219 is provided at the upper end of the disc 218, and a plurality of second positioning grooves 220 adapted to the assembly strip 215 are provided on the inner side of the annular spacer 219, and a plurality of avoidance grooves 221 are opened from top to bottom on the upper surface of the annular spacer 219, and the position of the avoidance grooves 221 corresponds to the long strip liquid outlet 214.
[0023] The lower end of the enzymolysis solution injection pipe 202 sequentially passes through the temporary storage box 210, the support pipe 211, the assembly pipe 213 and the limiting seat 216 and then extends into the separation chamber of the inner barrel body 204. The enzymolysis solution injection pipe 202 is fixedly connected to the temporary storage box 210. The support pipe 211, the positioning seat 212, the assembly pipe 213 and the enzymolysis solution injection pipe 202 are all preset with a supernatant passing gap 222. The supernatant passes through the side of the gap 222 through the long strip liquid outlet 214 and the avoidance groove 221 and is connected to the internal space of the inner barrel body 204. The upper end of the supernatant passes through the gap 222 and is connected to the internal space of the temporary storage box 210. The sealing sleeve of the limiting seat 216 is arranged on the outside of the enzymolysis solution injection pipe 202 to prevent the supernatant from being drained to the bottom through the supernatant in the gap 222 during the enzymolysis solution injection process, that is, the lower end of the supernatant passes through the gap 222 in a blocked shape.
[0024] The driving mechanism includes a column 301, a motor 1 302, a transmission wheel 1 303 and a transmission wheel 2 304. The lower end of the column 301 is fixedly connected to the support platform 100 through a flange, a motor mounting seat 305 is arranged on the upper end of the column 301, the motor 1 302 is fixedly connected to the motor mounting seat 305, the transmission wheel 1 303 is coaxially fixedly connected to the output shaft of the motor 1 302, the transmission wheel 2 304 is coaxially fixedly connected to the upper end of the inner barrel body 204, the transmission wheel 2 304 is located above the outer barrel body 203, and the transmission wheel 1 303 and the transmission wheel 2 304 are connected by belt or chain transmission. When the output shaft of the motor 1 302 drives the transmission wheel 1 303 to rotate circumferentially, the transmission wheel 1 303 drives the transmission wheel 2 304 to rotate synchronously through the belt, and the inner barrel body 204 rotates circumferentially on the inner side of the outer barrel body 203.
[0025] As a preferred solution of this embodiment, a protective cover 306 is fixedly connected to the upper end of the motor mounting seat 305 , the transmission wheel 1 303 and the transmission wheel 2 304 are located in the protective cover 306 , and the temporary storage box 210 is fixedly connected to the protective cover 306 .
[0026] The sediment discharge mechanism includes a drive shaft 401 and a second motor 402. The upper end of the drive shaft 401 passes through the outer barrel body 203 and the inner barrel body 204 and then extends into the inner barrel body 204. The drive shaft 401 is in sealed rotation connection with the outer barrel body 203 and the inner barrel body 204. A spiral plate 403 is arranged at the position of the drive shaft 401 located in the inner barrel body 204. The spiral plate 403 matches the shape of the sediment conveying bin. The distance between the outer edge of the spiral plate 403 and the inner wall of the inner barrel body 204 is 0.2-0.5mm. The output shaft of the second motor 402 is coaxially fixed to the lower end of the drive shaft 401. The second motor 402 is located below the outer barrel body 203.
[0027] The centrifuge for obtaining polypeptide liquid from low-value deep-sea fish hydrolysate provided in this embodiment has the following working principle: The enzymolysis solution is injected into the separation chamber of the inner barrel body 204 from the enzymolysis solution injection pipe 202, and the motor 1 302 drives the inner barrel body 204 to rotate circumferentially through the transmission cooperation of the transmission wheel 1 303 and the transmission wheel 2 304. The enzymolysis solution rotates with the inner barrel body 204, and the heavy fish bone fragments perform centrifugal motion and slide along the inner wall of the inner barrel body 204 to the sediment conveying chamber. The supernatant enters from the gap between the disc 218, enters the supernatant through the gap 222 through the avoidance groove 221 and the long strip liquid outlet hole 214, and finally flows out from the supernatant discharge pipe 201; the motor 2 402 drives the spiral plate 403 to rotate circumferentially through the drive shaft 401, and the sediment in the sediment conveying chamber is driven downward by the spiral plate 403, enters the cavity between the inner barrel body 204 and the outer barrel body 203 through the lower end opening of the inner barrel body 204 and the sediment discharge hole 209 on the support seat 208, and is finally discharged from the sediment discharge pipe 207.
[0028] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A centrifuge for obtaining polypeptide liquid from low-value deep-sea fish hydrolysate, characterized by: It includes a support platform, a centrifugal mechanism, a driving mechanism and a sediment discharge mechanism; The centrifugal mechanism includes a barrel body, a supernatant discharge pipe, and an enzymatic solution injection pipe. The barrel body includes an outer barrel body and an inner barrel body. Four legs are arranged at the lower end of the outer barrel body, and the legs are fixed to the upper surface of the support platform. A sediment discharge pipe is arranged at the lower end of the outer barrel body. The inner barrel body is rotatably connected in the outer barrel body, and the upper end of the inner barrel body passes through the outer barrel body. The driving mechanism includes a column, a motor 1, a transmission wheel 1 and a transmission wheel 2. The lower end of the column is fixedly connected to the support platform by a flange, a motor mounting seat is arranged on the upper end of the column, the motor 1 is fixedly connected to the motor mounting seat, the transmission wheel 1 is coaxially fixedly connected to the output shaft of the motor 1, the transmission wheel 2 is coaxially fixedly connected to the upper end of the inner barrel body, the transmission wheel 2 is located above the outer barrel body, and the transmission wheel 1 and the transmission wheel 2 are connected by a belt or chain transmission.
2. The centrifuge for obtaining polypeptide liquid from low-value deep-sea fish hydrolysate according to claim 1, characterized in that: An inspection plate and a cleaning pipe are arranged on the side of the outer barrel.
3. The centrifuge for obtaining polypeptide liquid from low-value deep-sea fish hydrolysate according to claim 2, characterized in that: A support seat is arranged at the inner bottom of the outer barrel body, and a plurality of sediment discharge holes are opened on the lower side surface of the support seat. The lower end of the inner barrel body is rotatably connected to the support seat, and the upper end of the inner barrel body is sealed and rotatably connected to the outer barrel body. The internal space of the inner barrel body is divided into a separation bin located at the upper part and a sediment conveying bin located at the lower part. The cross-section of the sediment conveying bin decreases successively in a top-down direction. A sediment temporary storage chamber is formed between the lower part of the inner barrel body and the outer barrel body, the cleaning pipe and the sediment discharge pipe are connected to the sediment temporary storage chamber, and the sediment discharge hole connects the lower end opening of the inner barrel body with the sediment temporary storage chamber.
4. The centrifuge for obtaining polypeptide liquid from low-value deep-sea fish hydrolysate according to claim 3, characterized in that: The upper part of the inner barrel body is connected to the inner wall of the outer barrel body through an annular slide rail and an annular slider, wherein the annular slide rail is fixed to the outer wall of the inner barrel body, and the annular slider is fixed to the inner wall of the outer barrel body. The annular slide rail and the annular slider are slidably matched, a roller is arranged in the annular slide rail, and the plane where the annular slider contacts the roller is an arc-shaped design.
5. The centrifuge for obtaining polypeptide liquid from low-value deep-sea fish hydrolysate according to claim 3, characterized in that: The tube has a bottom end, and the bottom end is provided with a toothed box, and the toothed box has a bottom end ...
6. The centrifuge for obtaining polypeptide liquid from low-value deep-sea fish hydrolysate according to claim 5, characterized in that: The lower end of the enzymolysis solution injection tube passes through the temporary storage box, the support tube, the assembly tube and the limit seat in sequence and then extends into the separation chamber of the inner barrel body. The enzymolysis solution injection tube is fixedly connected to the temporary storage box. A supernatant liquid passage gap is preset between the support tube, the positioning seat, the assembly tube and the enzymolysis solution injection tube. The supernatant liquid passes through the side of the gap and is connected with the internal space of the inner barrel body through the long strip liquid outlet hole and the avoidance groove. The upper end of the supernatant liquid passes through the gap and is connected with the internal space of the temporary storage box. The limit seat sealing sleeve is arranged on the outside of the enzymolysis solution injection tube, so that the lower end of the supernatant liquid passes through the gap is blocked.
7. The centrifuge for obtaining polypeptide liquid from low-value deep-sea fish hydrolysate according to claim 6, characterized in that: The upper end of the motor mounting seat is fixedly connected with a protective cover, the transmission wheel 1 and the transmission wheel 2 are located in the protective cover, and the temporary storage box is fixedly connected to the protective cover.
8. The centrifuge for obtaining polypeptide liquid from low-value deep-sea fish hydrolysate according to claim 6, characterized in that: The sediment discharge mechanism includes a drive shaft and a second motor. The upper end of the drive shaft penetrates the outer barrel body and the inner barrel body and then extends into the inner barrel body. The drive shaft is in sealed rotation connection with the outer barrel body and the inner barrel body. A spiral plate is arranged at the position of the drive shaft located at the inner barrel body. The spiral plate matches the shape of the sediment conveying bin. The distance between the outer edge of the spiral plate and the inner wall of the inner barrel body is 0.2-0.5mm. The output shaft of the second motor is coaxially fixed with the lower end of the drive shaft. The second motor is located below the outer barrel body.