CN118006705A - A preparation process and production line of brown algae oligosaccharide products - Google Patents

Abstract

The invention discloses a brown algae oligosaccharide product preparation production line, which comprises a fermentation tank for fermentation, an ultrafiltration tank for ultrafiltration and a spray drying tank for drying, wherein an inner cylinder body is arranged in the spray drying tank, a first drying cavity is formed between the outer wall of the inner cylinder body and the inner wall of the spray drying tank in a surrounding manner, a second drying cavity is formed between the inner wall of the inner cylinder body and the inner wall of the spray drying tank in a surrounding manner, a liquid spraying ring and a first hot air spraying ring are respectively arranged at the top end and the bottom end of the first drying cavity, and a second hot air spraying ring is arranged at the bottom end of the second drying cavity. According to the invention, through the arrangement of the first drying cavity and the second drying cavity, the moving path of the material can be prolonged, the material is ensured to be fully contacted with hot air, and the drying operation in the first drying cavity and the second drying cavity is ensured not to be interfered with each other, so that upward hot air and downward hot air can fully act on the material, the heat energy utilization rate is high, and the drying effect on the material is improved.

Description

A preparation process and production line of brown algae oligosaccharide products

Technical Field

The present invention relates to the technical field of brown algae oligosaccharide preparation, and in particular to a brown algae oligosaccharide product preparation process and production line.

Background technique

Due to its unique structure, the activity research of brown algae oligosaccharide has become a hot topic in the research of carbohydrate drugs, and important progress has been made in the research of its biological activity. The content of brown algae oligosaccharide in alginate is extremely high, and alginate mainly exists in the cell walls of kelp, sargassum and giant kelp.

Therefore, the preparation of brown algae oligosaccharides is mostly extracted from alginate, and the extraction process is mostly fermentation enzymatic hydrolysis. The fermented bacteria are ultrafiltered and dried to finally obtain solid particles of brown algae oligosaccharides. The whole process requires the use of fermentation equipment, ultrafiltration equipment and drying equipment, and drying is mostly carried out by spray drying.

For example, the prior art (CN113617044A) discloses a countercurrent spray drying device, which uses a mist outlet and a hot air outlet arranged in an annular staggered manner so that the mist droplets sprayed from the mist outlet flow downward in a circle, while the hot air sprayed from the hot air outlet flows upward in a circle, forming a staggered countercurrent, which increases the contact area while reducing the contact time, thereby improving the drying and forming effect of the product. In addition, the hot air is first dried in a countercurrent manner with the mist droplets, and then flows in the same direction as the mist droplets, driving the mist droplets and powder and particle products to flow toward the discharge port at the bottom of the tower body, thereby improving the airflow conditions in the tower body and improving the drying and forming efficiency.

However, in the above technology, the hot air flows upward from the inner layer to the top of the tower body, and then flows downward along the two sides of the tower body, so that the downward hot air flows along the inner wall of the tower body, and there are multiple mist outlets distributed from the inside to the outside. After the mist droplets sprayed from the mist outlets located in the inner circle are dried by the upward hot air, the material and the downward hot air are separated by the upward hot air, resulting in the material being unable to contact the downward hot air, resulting in the material only being able to be countercurrently dried, and being unable to achieve co-directional drying, which is not conducive to the drying effect of the material.

At the same time, the falling distance of the droplets into powder particles is the height of the tower body, and the entire displacement range is small, resulting in a short contact time with the hot air, which cannot ensure that the material is completely dried.

In view of the defects existing in the above prior art, it is necessary to further improve it to meet the actual usage.

Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

Therefore, the object of the present invention is to provide a preparation process and production line of brown algae oligosaccharide products.

The present invention provides a process for preparing brown algae oligosaccharide products, comprising the following steps:

1. Using microbial strains, glucose and molasses as carbon sources, fermenting brown alginate oligosaccharide to obtain fermented bacteria;

2. removing the bacteria by ultrafiltration to obtain the fermentation supernatant;

3. Spray drying the fermentation supernatant to obtain finished brown algae oligosaccharide particles.

A production line for preparing brown algae oligosaccharide products, comprising a fermentation tank for fermentation, an ultrafiltration tank for ultrafiltration, and a spray drying tank for drying, wherein an inner cylinder is arranged inside the spray drying tank, a first drying chamber is enclosed between the outer wall of the inner cylinder and the inner wall of the spray drying tank, a second drying chamber is enclosed between the inner wall of the inner cylinder and the inner wall of the spray drying tank, a liquid spray ring and a first hot air spray ring are respectively arranged at the top and bottom of the first drying chamber, and a second hot air spray ring is arranged at the bottom of the second drying chamber;

A rotating cylinder is sleeved on the outer wall of the inner cylinder, a first through hole is opened on the lower wall of the inner cylinder, and a second through hole staggered with the first through hole is opened on the lower wall of the rotating cylinder;

A guide hood is welded to the inner wall of the upper part of the inner cylinder, and a collecting hopper is welded to the inner circular wall of the second hot gas spray ring, and a discharge end of the collecting hopper extends out of the spray drying tank;

A hot air blower is bolted to the bottom wall of the spray drying tank, and the air outlet end of the hot air blower is connected to the flange of the air guide pipe. The air guide pipe is welded and connected to the first hot air spray ring through a first connecting pipe, and a first opener and closeer for opening and closing is provided on the first connecting pipe. The air guide pipe is welded and connected to the second hot air spray ring through a second connecting pipe, and a second opener and closeer for opening and closing is provided on the second connecting pipe.

As the preferred technical solution:

A production line for preparing brown algae oligosaccharide products as described above, wherein a motor, a feed pump and a micro switch are bolted to the outer wall of the top of the spray drying tank, the output shaft of the motor extends into the spray drying tank and is welded to a horizontal plate, and both ends of the horizontal plate are welded to the inner wall of the rotating cylinder;

The output shaft of the motor located outside the spray drying tank is welded to a cross bar, and a bottom surface of one end of the cross bar is provided with an inclined surface for pressing a micro switch. The micro switch is connected to the feed pump wire. The feed end of the feed pump is connected to a flange at one end of a liquid inlet pipe, and the other end of the liquid inlet pipe extends into the spray drying tank and is welded to a liquid spray ring.

Through the above technical solution, the liquid inlet end of the feed pump is connected to the fermentation supernatant storage box through a pipeline, so that after the feed pump is powered on, the supernatant can pass through the liquid inlet pipe;

After the motor is powered on, the motor output shaft drives the horizontal plate to rotate synchronously, and then the horizontal plate can drive the rotating cylinder to rotate, and the structure is reasonable.

A production line for preparing brown algae oligosaccharide products as described above, wherein the liquid spray ring and the first hot air spray ring are both welded to the inner wall of the spray drying tank via metal rods, and the outer circular wall of the second hot air spray ring is welded to the inner wall of the inner cylinder;

The liquid spray ring and the first hot gas spray ring are coaxial and have the same inner diameter. The bottom surface of the liquid spray ring is threadedly connected with an annularly distributed spray nozzle. The first hot gas spray ring and the second hot gas spray ring are provided with annularly distributed hot gas spray holes on their surfaces.

Through the above technical scheme, the liquid spray ring can spray the fermentation supernatant in the form of mist through the spray nozzle, and the first hot air spray ring can spray upward-flowing hot air through the hot air nozzle. The positional relationship between the liquid spray ring and the first hot air spray ring allows the downward mist droplets to come into contact with the upward hot air, thereby achieving drying of the mist droplets.

In the above-mentioned production line for preparing brown algae oligosaccharide products, the first connecting pipe and the second connecting pipe have the same structure, and both include an upper pipe body and a lower pipe body, and the lower pipe body penetrates the bottom wall of the spray drying tank and is welded to the wall of the spray drying tank;

The first shutter and the second shutter have the same structure and both include a rotating sleeve. The opposite ends of the upper tube body and the lower tube body extend into the rotating sleeve. The outer walls of the upper tube body and the lower tube body are movably connected to the inner wall of the rotating sleeve by sealed bearings.

Through the above technical solution, the rotating sleeve can connect the upper tube body and the lower tube body, so that the upper tube body and the lower tube body can be combined into an air intake duct with the rotating sleeve, so that hot air can enter the first hot air spray ring and the second hot air spray ring through the duct.

In the above-mentioned production line for preparing brown algae oligosaccharide products, the first shutter and the second shutter further include a sealing plate and a sealing cylinder, the sealing plate is welded and fixed to the inner wall of the first connecting tube, the bottom end of the sealing cylinder extends into the second connecting tube, and the top end of the sealing cylinder extends into the first connecting tube and fits the sealing plate;

The sealing cylinder is a hollow cylindrical structure with an open bottom end. The top wall of the sealing cylinder is evenly provided with fourth through holes. The sealing plate is evenly provided with third through holes staggered with the fourth through holes.

Through the above technical solution, when the third through hole on the sealing cylinder and the fourth through hole on the sealing plate are staggered, the upper tube body and the lower tube body are disconnected and the airflow cannot pass through. Only when the third through hole on the sealing cylinder and the fourth through hole on the sealing plate are aligned, the upper tube body and the lower tube body are connected and the airflow can flow normally.

In the above-mentioned production line for preparing brown algae oligosaccharide products, a collar welded to the outer wall of the sealing cylinder is sleeved thereon, the outer circular wall of the collar is welded to the inner wall of the rotating sleeve, and the outer wall of the sealing cylinder is sealed and fitted to the inner walls of the upper tube body and the lower tube body.

Through the above technical solution, polytetrafluoroethylene gaskets are bonded to the inner walls of the upper tube body and the lower tube body, and the polytetrafluoroethylene gaskets are sealed to the outer wall of the sealing tube, so that the sealing effect is achieved while reducing friction.

In the above-mentioned production line for preparing brown algae oligosaccharide products, a first gear is welded to the outer circular wall of the rotating sleeve on the first shutter, a second gear is welded to the outer circular wall of the rotating sleeve on the second shutter, an outer gear ring meshing with the first gear is welded to the outer wall of the rotating cylinder, and an inner gear ring meshing with the second gear is welded to the inner wall of the rotating cylinder.

The top of the inner cylinder is welded to the inner wall of the spray drying tank through a fixing rod, the inner walls of the top and bottom of the spray drying tank are welded to fixing rings, and the outer walls of both ends of the rotating cylinder are movably connected to the inner wall bearings of the fixing rings;

Through the above technical solution, the top and bottom ends of the inner cylinder do not contact the inner wall of the spray drying tank, and a gap is formed between the inner cylinder and the inner wall of the spray drying tank, so that the cross plate can pass through the gap, and the inner gear ring can be located in the gap, so that the rotation of the cross plate and the inner gear ring is not hindered by the inner cylinder, and there are four fixing rods distributed in a ring around the axis of the inner cylinder. As long as the rotation angle of the cross plate is less than 90°, it will not collide with the cross plate, and the structure is reasonable.

A production line for preparing brown algae oligosaccharide products as described above, wherein a gas-liquid separator is bolted to the lower outer wall of the spray drying tank, a first air outlet pipe is welded and connected to the wall of the spray drying tank on one side of the first drying chamber, the bottom end of the first air outlet pipe is butt-jointed with the air inlet end flange of the gas-liquid separator, and the air outlet end of the gas-liquid separator is butt-jointed with the second air outlet pipe flange;

The air inlet end and the bottom end of the second air outlet pipe of the hot air blower are both sealed and connected to the flange of the air collecting box, and the bottom end of the air collecting box is welded and connected to the air inlet pipe.

Through the above technical solution, the upward hot air in the first drying chamber contacts the spray drying tank and is eventually discharged from the first outlet pipe. Since the hot air generates steam when drying the droplets, the hot air carries the steam into the gas-liquid separator for separation to remove moisture from the hot air. The separated hot air enters the gas collecting box through the second outlet pipe for recycling.

In the above-mentioned production line for preparing brown algae oligosaccharide products, the bottom end of the collecting hopper is butted against the flange at the inlet end of the solid-gas separator, and the gas outlet end of the solid-gas separator is sealed and connected to the flange of the gas collecting box via a third gas outlet pipe;

A hemispherical hollow filter cover is welded to the inner wall of the outer periphery of the connection point between the air collecting box and the third air outlet pipe. The inner and outer walls of the filter cover are both hollow structures, and a silica gel desiccant is placed inside the filter cover.

Through the above technical solution, the hot air in the second drying chamber will drive the powder particles to be discharged together through the collecting hopper. The gas and powder particles can be separated by the solid-gas separator. The separated gas enters the gas collecting box through the third outlet pipe for recycling. After the gas dries the powder particles twice and three times, water vapor will be mixed in it. In order to ensure the subsequent drying effect of the hot air, the hot air is dehydrated and dried by silica gel desiccant.

The beneficial effects of the brown algae oligosaccharide product preparation process and production line of the present invention are as follows:

The present invention is provided with an inner cylinder in the spray drying tank, through which the interior of the spray drying tank can be divided into a first drying chamber and a second drying chamber, and the first hot air spray ring can spray upward hot air in the first drying chamber, and can perform countercurrent drying on the droplets sprayed by the liquid spray ring, so that the droplets can achieve preliminary drying;

At the same time, a second hot air spray ring is also provided. When the second hot air spray ring is running, the first hot air spray ring and the liquid spray ring are stopped. The second hot air spray ring can spray hot air upward in the second drying chamber. At this time, according to Bernoulli's principle, the faster the airflow flows, the smaller the pressure is. Then, the flowing hot air sucks the preliminarily dried powder particles into the second drying chamber through the first through hole. The material moves upward with the hot air to form secondary co-directional drying. Finally, the hot air contacts the guide cover and flows downward. The material moves downward with the hot air to form tertiary co-directional drying.

In this way, by setting the first drying chamber and the second drying chamber, not only can the material movement path be extended to ensure that the material is fully in contact with the hot air, but also it is ensured that the drying operations in the first drying chamber and the second drying chamber do not interfere with each other, so that the upward hot air and the downward hot air can fully act on the material, the thermal energy utilization rate is high, and the drying effect on the material is improved.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which

FIG1 is a schematic front view of the interior of the present invention;

FIG2 is a perspective schematic diagram of an inner cylinder and a rotating cylinder of the present invention;

FIG3 is a schematic top view of the inner cylinder and the rotating cylinder of the present invention;

FIG4 is a schematic diagram of a top view of the crossbar and micro switch of the present invention;

FIG5 is a schematic diagram of a three-dimensional structure of a crossbar and an inclined plane of the present invention;

FIG6 is an enlarged schematic diagram of point A in FIG1 of the present invention;

FIG7 is a schematic top view of the rotating drum, the outer gear ring and the inner gear ring of the present invention;

FIG8 is a cross-sectional schematic diagram of the first connecting pipe and the first shutter of the present invention;

FIG. 9 is a perspective schematic diagram of a rotating sleeve and a sealing plate of the present invention.

In the figure: 1, spray drying tank; 2, inner cylinder; 3, first drying chamber; 4, second drying chamber; 5, rotating cylinder; 6, first through hole; 7, second through hole; 8, first hot air spray ring; 9, second hot air spray ring; 10, liquid spray ring; 11, liquid inlet pipe; 12, guide cover; 13, collecting hopper; 14, hot air blower; 15, air guide pipe; 16, first connecting pipe; 17, second connecting pipe; 18, first shutter; 19, second shutter; 20, outer gear ring; 21, inner gear ring; 22, first gear; 23, second Two gears; 24. Fixed ring; 25. Fixed rod; 26. Motor; 27. Feed pump; 28. Cross bar; 29. Inclined surface; 30. Micro switch; 31. Cross plate; 32. First air outlet pipe; 33. Gas-liquid separator; 34. Second air outlet pipe; 35. Gas collecting box; 36. Solid-gas separator; 37. Third air outlet pipe; 38. Air inlet pipe; 39. Upper tube body; 40. Lower tube body; 41. Rotating sleeve; 42. Sealing plate; 43. Sealing cylinder; 44. Ring; 45. Third through hole; 46. Fourth through hole.

Detailed ways

In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

The present invention provides a technical solution: a process for preparing brown algae oligosaccharide products, comprising the following steps:

1. Using microbial strains, glucose and molasses as carbon sources, fermenting brown alginate oligosaccharide to obtain fermented bacteria;

2. removing the bacteria by ultrafiltration to obtain the fermentation supernatant;

3. Spray drying the fermentation supernatant to obtain finished brown algae oligosaccharide particles.

As shown in Figures 1 and 3, a production line for preparing brown algae oligosaccharide products includes a fermentation tank for fermentation, an ultrafiltration tank for ultrafiltration, and a spray drying tank 1 for drying, wherein an inner cylinder 2 is arranged inside the spray drying tank 1, a rotating cylinder 5 is sleeved on the outer wall of the inner cylinder 2, the top of the inner cylinder 2 is welded to the inner wall of the spray drying tank 1 through a fixing rod 25, a fixing ring 24 is welded to the inner wall of the top and bottom of the spray drying tank 1, the outer walls of both ends of the rotating cylinder 5 are movably connected to the inner wall bearing of the fixing ring 24, a first through hole 6 is opened on the lower wall of the inner cylinder 2, a second through hole 7 staggered with the first through hole 6 is opened on the lower wall of the rotating cylinder 5, a guide cover 12 is welded to the upper inner wall of the inner cylinder 2, a collecting hopper 13 is welded to the inner circular wall of the second hot gas spray ring 9, and the discharge end of the collecting hopper 13 extends out of the spray drying tank 1,

Both ends of the rotating cylinder 5 are fixed in the spray drying tank 1 through the fixing rings 24 and can rotate axially between the two fixing rings 24. The rotating cylinder 5 can rotate so that the second through hole 7 and the first through hole 6 thereon can be staggered or separated.

As shown in Fig. 1-5, a first drying chamber 3 is enclosed between the outer wall of the inner cylinder 2 and the inner wall of the spray drying tank 1, a second drying chamber 4 is enclosed between the inner wall of the inner cylinder 2 and the inner wall of the spray drying tank 1, a liquid spray ring 10 and a first hot air spray ring 8 are respectively arranged at the top and bottom of the first drying chamber 3, and a second hot air spray ring 9 is arranged at the bottom of the second drying chamber 4;

The outer wall of the top of the spray drying tank 1 is bolted with a motor 26, a feed pump 27 and a micro switch 30. The output shaft of the motor 26 extends into the spray drying tank 1 and is welded to a horizontal plate 31. Both ends of the horizontal plate 31 are welded to the inner wall of the rotating cylinder 5.

The output shaft of the motor 26 located outside the spray drying tank 1 is welded with a crossbar 28, and a bottom surface of one end of the crossbar 28 is provided with an inclined surface 29 for pressing a micro switch 30. The micro switch 30 is connected to the feed pump 27 by wires. The feed end of the feed pump 27 is connected to a flange at one end of the liquid inlet pipe 11, and the other end of the liquid inlet pipe 11 extends into the spray drying tank 1 and is welded to the liquid spray ring 10.

The liquid spray ring 10 and the first hot gas spray ring 8 are both welded to the inner wall of the spray drying tank 1 through metal rods, and the outer circular wall of the second hot gas spray ring 9 is welded to the inner wall of the inner cylinder 2;

The liquid spray ring 10 and the first hot gas spray ring 8 are coaxial and have the same inner diameter. The bottom surface of the liquid spray ring 10 is threadedly connected with an annularly distributed spray nozzle, and the surfaces of the first hot gas spray ring 8 and the second hot gas spray ring 9 are provided with annularly distributed hot gas spray holes.

When the motor 26 is running, it can drive the cross bar 28 to rotate synchronously. When the cross bar 28 moves, it can contact the button on the micro switch 30 through the inclined surface 29, and gradually press the button on the micro switch 30 until the micro switch 30 is turned on. In this way, the feeding pump 27 is connected to the circuit and powered on. The feeding pump 27 can pump the supernatant into the spray ring 10 through the liquid inlet pipe 11, and the spray ring 10 sprays the supernatant in the form of mist through the spray nozzle;

The first hot air spray ring 8 sprays hot air flowing upward through the hot air spray hole, which just contacts with the downward-flowing droplets and performs drying operation. The first countercurrent drying operation can be completed through the first drying chamber 3. After the operation is completed, the liquid spray ring 10 and the first hot air spray ring 8 stop working, and the second hot air spray ring 9 sprays hot air flowing upward through the hot air spray hole. The hot air adheres to the inner wall of the inner cylinder 2 and flows at a high speed. The faster the gas flow rate, the lower the pressure. At this time, the second through hole 7 is aligned with the first through hole 6, so that the powder particles after the initial drying are sucked into the inner cylinder 2 through the second through hole 7 and the first through hole 6 by the high-speed flowing hot air;

The hot air carries the powder particles upward in the second drying chamber 4 to achieve secondary same-direction drying. When the hot air contacts the inverted cone-shaped guide cover 12, the hot air carries the material downward again to achieve three times of same-direction drying. Finally, the hot air drives the powder particles to be discharged through the collecting hopper 13. The whole drying process is divided into three parts to ensure that the hot air is fully in contact with the material, thereby improving the drying effect.

When the liquid spray ring 10 and the first hot air spray ring 8 start working again, and the second hot air spray ring 9 stops working, the second through hole 7 is staggered with the first through hole 6, so that when the first drying chamber 3 is drying for the first time, the second drying chamber 4 can also carry out drying operation synchronously, so that they can be carried out synchronously without interfering with each other.

As shown in Figures 1 and 6, a hot air blower 14 is bolted to the bottom wall of the spray drying tank 1, and the air outlet end of the hot air blower 14 is flange-connected to the air guide pipe 15. The air guide pipe 15 is welded and connected to the first hot air spray ring 8 through a first connecting pipe 16, and a first shutter 18 for opening and closing is provided on the first connecting pipe 16. The air guide pipe 15 is welded and connected to the second hot air spray ring 9 through a second connecting pipe 17, and a second shutter 19 for opening and closing is provided on the second connecting pipe 17.

In the initial state, the first shutter 18 is open and the second shutter 19 is closed, so that the first hot air spray ring 8 sprays hot air while the second hot air spray ring 9 is inoperative.

As shown in FIGS. 6-9 , the first connecting pipe 16 and the second connecting pipe 17 have the same structure, and both include an upper pipe body 39 and a lower pipe body 40 . The lower pipe body 40 penetrates the bottom wall of the spray drying tank 1 and is welded to the wall of the spray drying tank 1 .

The first shutter 18 and the second shutter 19 have the same structure, and both include a rotating sleeve 41. The opposite ends of the upper tube 39 and the lower tube 40 are inserted into the rotating sleeve 41, and the outer walls of the upper tube 39 and the lower tube 40 are movably connected with the inner wall of the rotating sleeve 41 by sealed bearings;

The first shutter 18 and the second shutter 19 further include a sealing plate 42 and a sealing cylinder 43. The sealing plate 42 is welded and fixed to the inner wall of the first connecting pipe 16. The bottom end of the sealing cylinder 43 extends into the second connecting pipe 17. The top end of the sealing cylinder 43 extends into the first connecting pipe 16 and fits the sealing plate 42.

The sealing cylinder 43 is a hollow cylindrical structure with an open bottom. The top wall of the sealing cylinder 43 is evenly provided with fourth through holes 46. The sealing plate 42 is evenly provided with third through holes 45 staggered with the fourth through holes 46. A collar 44 is welded to the outer wall of the sealing cylinder 43. The outer wall of the collar 44 is welded to the inner wall of the rotating sleeve 41. The outer wall of the sealing cylinder 43 is sealed and fitted with the inner walls of the upper tube body 39 and the lower tube body 40.

The outer wall of the rotating sleeve 41 on the first shutter 18 is welded with a first gear 22, the outer wall of the rotating sleeve 41 on the second shutter 19 is welded with a second gear 23, the outer wall of the rotating cylinder 5 is welded with an outer gear ring 20 meshing with the first gear 22, and the inner wall of the rotating cylinder 5 is welded with an inner gear ring 21 meshing with the second gear 23.

When the rotating sleeve 41 rotates, the sealing cylinder 43 can be driven to rotate synchronously through the collar 44. The sealing cylinder 43 rotates to align or stagger the fourth through hole 46 with the third through hole 45 on the sealing plate 42. When aligned, the airflow can flow through the third through hole 45 and the fourth through hole 46, and the shutter is in an open state. When staggered, the gas is blocked by the sealing plate 42 and the sealing cylinder 43, and the shutter is in a closed state.

When the motor 26 is working, the motor 26 drives the rotating drum 5 to rotate through the transverse plate 31, and the outer gear ring 20 and the inner gear ring 21 rotate synchronously with the rotating drum 5. The outer gear ring 20 drives the first shutter 18 to rotate through the first gear 22. At this time, the third through hole 45 and the fourth through hole 46 on the first shutter 18 are staggered, and the first shutter 18 is closed;

The inner gear ring 21 drives the second shutter 19 to rotate through the second gear 23. At this time, the third through hole 45 and the fourth through hole 46 on the second shutter 19 are aligned, and the second shutter 19 is opened.

After the initial rotation of the sealing cylinder 43, the hot air in the air guide pipe 15 cannot enter the first hot air spray ring 8 through the first connecting pipe 16, but can only enter the second hot air spray ring 9 through the second connecting pipe 17. At this time, the second hot air spray ring 9 sprays hot air;

When the sealing cylinder 43 is rotated and reset again, the first hot air spray ring 8 and the second hot air spray ring 9 are alternately operated again, and such a reciprocating cycle can be performed continuously;

When the motor 26 drives the rotating sleeve 41 to rotate, the cross bar 28 will separate from the micro switch 30, thereby ensuring that the first hot air spray ring 8 and the liquid spray ring 10 can stop working synchronously. When the motor 26 drives the rotating sleeve 41 to reset, the first hot air spray ring 8 and the liquid spray ring 10 can operate synchronously again, thereby avoiding the waste caused by the droplets sprayed by the liquid spray ring 10 falling without being dried.

As shown in FIG1 , a gas-liquid separator 33 is bolted to the lower outer wall of the spray drying tank 1, and a first air outlet pipe 32 is welded to the wall of the spray drying tank 1 on one side of the first drying chamber 3, and the bottom end of the first air outlet pipe 32 is butted with the air inlet end flange of the gas-liquid separator 33, and the air outlet end of the gas-liquid separator 33 is butted with the second air outlet pipe 34 flange, and the air inlet end of the hot air blower 14 and the bottom end of the second air outlet pipe 34 are both sealed with the flange of the air collecting box 35, and the bottom end of the air collecting box 35 is welded with the air inlet pipe 38;

The bottom end of the collecting hopper 13 is connected to the flange of the inlet end of the solid-gas separator 36. The gas outlet end of the solid-gas separator 36 is sealed with the flange of the gas collecting box 35 through the third gas outlet pipe 37. A hemispherical hollow filter cover is welded and connected to the inner wall of the outer periphery of the connecting part between the gas collecting box 35 and the third gas outlet pipe 37. The inner and outer walls of the filter cover are both hollow structures, and a silica gel desiccant is placed inside the filter cover.

The second air outlet pipe 34 and the third air outlet pipe 37 are both provided with a one-way valve to prevent gas from flowing back. When the machine is just turned on, the hot air blower 14 draws outside air into the air collecting box 35 through the air inlet pipe 38, and after heating, sends the air into the first hot air spray ring 8 and the second hot air spray ring 9 through the air guide pipe 15;

After the hot air in the first drying chamber 3 is discharged through the first air outlet pipe 32 , the hot air in the first air outlet pipe 32 passes through the gas-liquid separator 33 and then is discharged from the second air outlet pipe 34 , and finally enters the air collecting box 35 .

After the hot air in the second drying chamber 4 carries the powder particles through the solid-gas separator 36 for separation, the hot air enters the air collecting box 35 through the third air outlet pipe 37, so that the hot air can be reused by the hot air blower 14. At this time, the air inlet pipe 38 can be closed, so that the hot air in the first drying chamber 3 and the second drying chamber 4 can be recycled without inhaling outside air, thereby reducing the energy consumption of the hot air blower 14 and achieving the effect of energy saving and emission reduction.

In the description of this specification, "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. A process for preparing brown algae oligosaccharide products, characterized in that it comprises the following steps: 1. Using microbial strains, glucose and molasses as carbon sources, fermenting brown alginate oligosaccharide to obtain fermented bacteria; 2. removing the bacteria by ultrafiltration to obtain the fermentation supernatant; 3. Spray drying the fermentation supernatant to obtain finished brown algae oligosaccharide particles. 2. A production line for implementing the process for preparing a brown algae oligosaccharide product according to claim 1, characterized in that it comprises a fermentation tank for fermentation, an ultrafiltration tank for ultrafiltration and a spray drying tank for drying, wherein an inner cylinder is arranged inside the spray drying tank, a first drying chamber is enclosed between the outer wall of the inner cylinder and the inner wall of the spray drying tank, a second drying chamber is enclosed between the inner wall of the inner cylinder and the inner wall of the spray drying tank, a liquid spray ring and a first hot air spray ring are respectively arranged at the top and bottom of the first drying chamber, and a second hot air spray ring is arranged at the bottom of the second drying chamber; A rotating cylinder is sleeved on the outer wall of the inner cylinder, a first through hole is opened on the lower wall of the inner cylinder, and a second through hole staggered with the first through hole is opened on the lower wall of the rotating cylinder; A guide hood is welded to the inner wall of the upper part of the inner cylinder, and a collecting hopper is welded to the inner circular wall of the second hot gas spray ring, and a discharge end of the collecting hopper extends out of the spray drying tank; A hot air blower is bolted to the bottom wall of the spray drying tank, and the air outlet end of the hot air blower is connected to the flange of the air guide pipe. The air guide pipe is welded and connected to the first hot air spray ring through a first connecting pipe, and a first opener and closeer for opening and closing is provided on the first connecting pipe. The air guide pipe is welded and connected to the second hot air spray ring through a second connecting pipe, and a second opener and closeer for opening and closing is provided on the second connecting pipe. 3. A production line for preparing brown algae oligosaccharide products according to claim 2, characterized in that: a motor, a feed pump and a micro switch are bolted to the outer wall of the top of the spray drying tank, the output shaft of the motor extends into the spray drying tank and is welded to a horizontal plate, and both ends of the horizontal plate are welded to the inner wall of the rotating cylinder; The output shaft of the motor located outside the spray drying tank is welded to a cross bar, and a bottom surface of one end of the cross bar is provided with an inclined surface for pressing a micro switch. The micro switch is connected to the feed pump wire. The feed end of the feed pump is connected to a flange at one end of a liquid inlet pipe, and the other end of the liquid inlet pipe extends into the spray drying tank and is welded to a liquid spray ring. 4. A production line for preparing brown algae oligosaccharide products according to claim 2, characterized in that: the liquid spray ring and the first hot air spray ring are both welded to the inner wall of the spray drying tank through a metal rod, and the outer circular wall of the second hot air spray ring is welded to the inner wall of the inner cylinder; The liquid spray ring and the first hot gas spray ring are coaxial and have the same inner diameter. The bottom surface of the liquid spray ring is threadedly connected with an annularly distributed spray nozzle. The first hot gas spray ring and the second hot gas spray ring are provided with annularly distributed hot gas spray holes on their surfaces. 5. A production line for preparing brown algae oligosaccharide products according to claim 2, characterized in that: the first connecting pipe and the second connecting pipe have the same structure, and both include an upper pipe body and a lower pipe body, and the lower pipe body penetrates the bottom wall of the spray drying tank and is welded to the wall of the spray drying tank; The first shutter and the second shutter have the same structure and both include a rotating sleeve. The opposite ends of the upper tube body and the lower tube body extend into the rotating sleeve. The outer walls of the upper tube body and the lower tube body are movably connected to the inner wall of the rotating sleeve by sealed bearings. 6. A production line for preparing brown algae oligosaccharide products according to claim 5, characterized in that: the first shutter and the second shutter further comprise a sealing plate and a sealing cylinder, the sealing plate is welded and fixed on the inner wall of the first connecting tube, the bottom end of the sealing cylinder extends into the second connecting tube, and the top end of the sealing cylinder extends into the first connecting tube and fits the sealing plate; The sealing cylinder is a hollow cylindrical structure with an open bottom end. The top wall of the sealing cylinder is evenly provided with fourth through holes. The sealing plate is evenly provided with third through holes staggered with the fourth through holes. 7. A brown algae oligosaccharide product preparation production line according to claim 6, characterized in that: a ring is welded to the outer wall of the sealing cylinder, the outer circular wall of the ring is welded to the inner wall of the rotating sleeve, and the outer wall of the sealing cylinder is sealed and fitted with the inner walls of the upper tube body and the lower tube body. 8. A production line for preparing brown algae oligosaccharide products according to claim 5, characterized in that: a first gear is welded to the outer circular wall of the rotating sleeve on the first shutter, a second gear is welded to the outer circular wall of the rotating sleeve on the second shutter, an outer gear ring meshing with the first gear is welded to the outer wall of the rotating cylinder, and an inner gear ring meshing with the second gear is welded to the inner wall of the rotating cylinder. The top of the inner cylinder is welded to the inner wall of the spray drying tank through a fixing rod, the top and bottom inner walls of the spray drying tank are welded to fixing rings, and the outer walls at both ends of the rotating cylinder are movably connected to the inner wall bearings of the fixing rings. 9. A production line for preparing brown algae oligosaccharide products according to claim 2, characterized in that: a gas-liquid separator is bolted to the lower outer wall of the spray drying tank, a first air outlet pipe is welded and connected to the wall of the spray drying tank on one side of the first drying chamber, the bottom end of the first air outlet pipe is butted with the air inlet end flange of the gas-liquid separator, and the air outlet end of the gas-liquid separator is butted with the second air outlet pipe flange; The air inlet end and the bottom end of the second air outlet pipe of the hot air blower are both sealed and connected to the flange of the air collecting box, and the bottom end of the air collecting box is welded and connected to the air inlet pipe. 10. A brown algae oligosaccharide product production line according to claim 9, characterized in that: the bottom end of the collecting hopper is butted against the flange at the inlet end of the solid-gas separator, and the gas outlet end of the solid-gas separator is sealed and connected to the flange of the gas collecting box through a third gas outlet pipe; A hemispherical hollow filter cover is welded to the inner wall of the outer periphery of the connection point between the air collecting box and the third air outlet pipe. The inner and outer walls of the filter cover are both hollow structures, and a silica gel desiccant is placed inside the filter cover.