A kind of sugar alcohol filtering device and filtering process

Abstract

The present invention belongs to the technical field of sugar alcohol production, and discloses a sugar alcohol filtering device and filtering process, including a frame, a plurality of transversely extending accommodating chambers are provided in the frame, the plurality of accommodating chambers are evenly spaced one by one, a filter cartridge is slidably connected in each accommodating chamber, a piston column is slidably connected in each filter cartridge, a feed pipe corresponding to the filter cartridge is fixedly connected to the frame, a solenoid valve for controlling the entry of raw materials is installed on each feed pipe, a first one-way valve is installed at one end of the feed pipe away from the solenoid valve, the first one-way valve is used to prevent the raw materials entering the filter cartridge from flowing back to the feed pipe, a liquid outlet housing is connected to the side of the filter cartridge close to the feed pipe, a filter screen is fixedly sleeved on the outer wall of the feed pipe close to the filter cartridge, a discharge pipe for discharging crystals is provided at the lower part of the frame, and when the filter cartridge moves in a direction away from the filter screen, the accommodating chamber is connected to the discharge pipe. The present invention has the effect of improving filtering efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of sugar alcohol production, and in particular to a sugar alcohol filtering device and a filtering process. Background Art

[0002] Sugar alcohols are a class of organic compounds with the sweet taste of sugars. They have the characteristics of both sugars and alcohols in their chemical structure. Compared with ordinary sugars, they have lower calories and different metabolic characteristics. Sugar alcohols are often used to replace sugar as low-calorie sweeteners and food additives.

[0003] Sugar alcohol is also a water-soluble substance produced by chemical reactions. In the production process of sugar alcohol, an evaporator is needed to concentrate the water-soluble sugar alcohol, thereby increasing the concentration of the solution and turning it into a saturated solution, which in turn causes crystal precipitation. The solution containing the crystals is then filtered to obtain sugar alcohol crystals, and finally the finished sugar alcohol product is obtained by drying.

[0004] Reference is made to the Chinese patent application document with publication number CN112479820A, which discloses a continuous oscillating film crystallization device for erythritol, which includes a mother liquid storage tank. A first roller can be rotated by a first motor. When the cam on the first roller rotates, it can cooperate with the roller to push the second slide bar to slide in the slide cylinder, and slide in the annular groove through the limit ring on the second slide bar, and can be reset under the action of a spring, so that the second slide bar can be pushed to slide left and right continuously, and then the slider can be pulled to slide up and down continuously in the slide groove through the second slide bar and the connecting rod, so that the ring can be pulled by the slider to slide up and down continuously in the mother liquid storage tank to clean the crystals on the inner wall of the mother liquid storage tank.

[0005] With regard to the above-mentioned related technologies, during the filtering process of the mother liquor, the mother liquor is passed into the mother liquor storage tank. After the mother liquor is filtered, the crystals will continue to adhere to the inner wall of the mother liquor tank, which will easily affect the filtering work. It is necessary to clean it so as to facilitate the continuous filtering work. After the filtering of a tank of mother liquor is completed, new mother liquor is passed in for filtration, which is not conducive to improving the filtering efficiency. Summary of the invention

[0006] In view of this, the present invention provides a filtration device and a filtration process for sugar alcohol, aiming to solve the problem of low filtration efficiency in the prior art.

[0007] To solve the above technical problems, in a first aspect, the present invention provides a sugar alcohol filtering device, comprising a frame, wherein a plurality of laterally extending accommodating chambers are provided in the frame, the plurality of accommodating chambers are evenly spaced, a filter cartridge is slidably connected in each accommodating chamber, a piston column is slidably connected in each filter cartridge, a feed pipe corresponding to the filter cartridge is fixedly connected to the frame, a solenoid valve for controlling the entry of raw materials is installed on each feed pipe, a first one-way valve is installed at one end of the feed pipe away from the solenoid valve, the first one-way valve is used to prevent the raw materials entering the filter cartridge from flowing back to the feed pipe, a liquid outlet housing is connected to a side of the filter cartridge close to the feed pipe, a filter screen is fixedly sleeved on the outer wall of the feed pipe close to the filter cartridge, a discharge pipe for discharging crystals is provided at the lower part of the frame, and when the filter cartridge moves in a direction away from the filter screen, the accommodating chamber is connected to the discharge pipe.

[0008] By adopting the above technical solution, the arrangement of multiple filter cylinders and piston rods can continuously extract the raw liquid. The reciprocating movement of the piston rod can squeeze the raw material while extracting it so as to separate the crystals, which is beneficial to improving the filtration efficiency. As the filtration work continues, the crystals remaining in the filter cylinder continue to increase. By moving the filter cylinder, the crystals can fall into the discharge pipe. At the same time, the piston rod can also push the crystals in the filter cylinder into the discharge pipe so that the crystals can be discharged in time, which is beneficial to improving the filtration efficiency.

[0009] Optionally, a push plate is slidably connected to the side of the liquid outlet housing away from the filter screen, a support spring is fixedly connected between the push plate and the discharge housing, a liquid outlet pipe is fixedly connected to the bottom of the liquid outlet housing, and a pressure relief valve is installed in the liquid outlet pipe.

[0010] By adopting the above technical solution, the setting of the pressure relief valve can create a certain pressure in the liquid outlet housing, which can push the push plate to move under the squeeze of the raw liquid. When the piston column moves away from the liquid outlet housing, the push plate pushes the raw liquid to flush the filter, thereby reducing the probability of clogging of the filter, which is beneficial to the continuous filtering work and thus beneficial to the improvement of the filtering efficiency.

[0011] Optionally, a driving motor is installed on the frame, and a transmission wheel is rotatably connected to the frame. The driving shaft of the driving motor can drive the transmission wheel to rotate through a belt drive. A crankshaft is fixedly connected to one side of the transmission wheel, and a connecting rod is hinged on the crankshaft. The end of the connecting rod away from the crankshaft is hinged to the piston column.

[0012] By adopting the above technical solution, when the piston column needs to move back and forth, starting the drive motor can drive the transmission wheel to rotate, and the transmission wheel drives the crankshaft to rotate. As the crankshaft rotates, the piston column can be driven to move back and forth under the action of the connecting rod to facilitate the filtering work.

[0013] Optionally, a linear drive is fixedly mounted on the frame, a driving shaft of the linear drive is fixedly connected to a movable plate, and the movable plate is fixedly connected to the filter cartridge.

[0014] By adopting the above technical solution, when it is necessary to discharge the crystals, the linear actuator can be driven to move the filter cartridge away from the filter screen to facilitate the discharge of the crystals. When it is necessary to continue the filtering work, the linear actuator is started to drive the filter cartridge to move toward the filter screen, and then the original liquid continues to be filtered, which is beneficial to improve the filtration efficiency.

[0015] Optionally, a blowing shell is fixedly connected to the frame, the interior of the blowing shell is hollow, and one side of the blowing shell is fixedly connected to an air inlet pipe connected to the interior of the blowing shell. When the filter cartridge moves away from the filter screen, the blowing shell is connected to the accommodating chamber.

[0016] By adopting the above technical scheme, when it is necessary to facilitate the discharge of crystals, the crystals can be blown by introducing air flow into the air inlet pipe, which can facilitate the discharge of crystals with the cooperation of the piston column, and at the same time, the filter can be blown, thereby cooperating with the original liquid to flush the filter, and the filter can be cleaned, so as to facilitate the continuous filtering work, which is beneficial to the improvement of filtering efficiency.

[0017] Optionally, the feed pipe is arranged through the center of the filter screen.

[0018] By adopting the above technical solution, the feed pipe enters the filter barrel through the center of the filter screen during feeding, so that the material can be evenly dispersed into the filter barrel and the crystals in the filter barrel can be flushed and broken up, thereby reducing the probability of crystals clogging the filter screen, which is beneficial to the continuous filtering work and improves the filtering efficiency.

[0019] Optionally, the diameter of the discharge pipe gradually decreases from top to bottom.

[0020] By adopting the above technical solution, the design of the shape of the discharge pipe can guide the separated crystals and then discharge them from the discharge pipe to facilitate collection by staff.

[0021] In a second aspect, the present invention provides a filtration process for sugar alcohols, which is applied to a filtration device for sugar alcohols in the first aspect, and the process is:

[0022] S1, start the driving motor to make the connecting rod drive the piston column to move back and forth horizontally. With the reciprocating movement of the piston column, the raw liquid can be continuously drawn into the filter cylinder;

[0023] S2, when the piston column moves toward the direction close to the feed pipe, it can exert pressure on the stock liquid so that part of the stock liquid passes through the filter screen and enters the liquid outlet housing, and the crystals are blocked by the filter screen and remain in the filter cylinder;

[0024] S3, as the filtering work continues, when the crystals in one of the filter cartridges continue to increase, the solenoid valve on the feed pipe is closed, and the filter cartridge is moved away from the filter screen, and the crystals fall into the discharge pipe for collection;

[0025] S4, after the collection is completed, the filter cartridge is reset and the solenoid valve is opened to continue the filtering work.

[0026] By adopting the above technical solution, the reciprocating motion of the piston rod is utilized to realize the extraction and discharge of the material. At the same time, since the piston rod realizes filtering by compressing the material, the pressurized method can smoothly filter the viscous material.

[0027] Optionally, in process S2, a pressure relief valve is provided to create a certain pressure in the liquid outlet housing, and when the piston column moves away from the filter screen, the filter screen is flushed with the original liquid under the action of the suction force of the push plate and the piston column.

[0028] By adopting the above technical solution, flushing the filter can ensure the continuous filtering work, which is beneficial to improving the filtering efficiency.

[0029] Optionally, in process S3, when the crystals fall into the discharge pipe, air flow is introduced into the air inlet pipe, and the air flow can blow the crystals down and clean the filter screen.

[0030] By adopting the above technical solution, blowing the crystals facilitates material discharge and can blow the filter at the same time, so that the filter can be cleaned again, reducing the probability of clogging, which is conducive to improving the filtering efficiency.

[0031] In summary, compared with the prior art, the present invention includes at least one of the following beneficial technical effects:

[0032] 1. The arrangement of multiple filter cartridges and piston rods can continuously extract the stock solution. The reciprocating movement of the piston rod can squeeze the raw material while extracting it, so as to separate the crystals, which is beneficial to improve the filtration efficiency. As the filtration work continues, the crystals remaining in the filter cartridge continue to increase. By moving the filter cartridge, the crystals can fall into the discharge pipe. At the same time, the piston rod can also push the crystals in the filter cartridge into the discharge pipe, so that the crystals can be discharged in time, which is beneficial to improve the filtration efficiency.

[0033] 2. When the piston column moves away from the liquid outlet housing, the push plate pushes the original liquid to flush the filter screen, thereby reducing the probability of filter screen clogging, which is conducive to the continuous filtration work and thus conducive to the improvement of filtration efficiency;

[0034] 3. When it is necessary to facilitate the discharge of crystals, the crystals can be blown by introducing air flow into the air inlet pipe. With the cooperation of the piston column, the crystals can be discharged easily and the filter screen can be blown at the same time, thereby cooperating with the original liquid to flush the filter screen and clean the filter screen, so as to facilitate the continuous filtering work and improve the filtering efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the structure of the filter cartridge and the piston rod assembly according to an embodiment of the present invention;

[0037] Figure 3 A schematic diagram of the structure of the drive motor and the frame assembly according to an embodiment of the present invention;

[0038] Figure 4 It is a structural schematic diagram of the communication between the accommodating chamber and the discharge pipe in an embodiment of the present invention.

[0039] Explanation of the reference numerals in the accompanying drawings: 1. Frame; 11. Accommodating chamber; 12. Filter cartridge; 13. Piston column; 14. Feed pipe; 141. First one-way valve; 15. Solenoid valve; 16. Liquid outlet housing; 17. Filter screen; 18. Discharge pipe; 2. Push plate; 21. Support spring; 22. Liquid outlet pipe; 23. Pressure relief valve; 3. Drive motor; 31. Transmission wheel; 32. Crankshaft; 33. Connecting rod; 34. Driving wheel; 35. Transmission belt; 4. Linear drive; 41. Moving plate; 5. Blowing housing; 51. Inlet pipe. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figure 1-Figure 4 , a clear and complete description of the technical solutions of the embodiments of the present invention is given. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0041] In a first aspect, the present invention provides a filtration device for sugar alcohols.

[0042] Reference Figure 1 and Figure 2A sugar alcohol filtering device includes a frame 1, a plurality of accommodating chambers 11 opened inside the frame 1, a filter cartridge 12 slidably connected to the accommodating chamber 11, a piston rod 13 slidably connected to the filter cartridge 12, a first driving mechanism driving the piston rod 13 to move back and forth, a second driving mechanism driving the filter cartridge 12 to move laterally, a feed pipe 14 connected to the inside of the filter cartridge 12, a liquid outlet shell 16 connected to the filter cartridge 12, a filter screen 17 fixedly sleeved on the outer wall of one end of the feed pipe 14, and a discharge pipe 18 that can be connected to the accommodating chamber 11, and the width of the discharge pipe 18 decreases from top to bottom to facilitate the collection of crystals.

[0043] There is a distance between the farthest position of the piston column 13 when it moves toward the filter screen 17 to facilitate the aggregation of crystals.

[0044] When the first driving mechanism drives the piston column 13 to move away from the feed pipe 14, the raw material can be continuously extracted into the filter cylinder 12 through the feed pipe 14. When the first driving mechanism drives the piston column 13 to move toward the feed pipe 14, the raw liquid in the filter cylinder 12 can be squeezed, and the raw liquid passes through the filter screen 17 into the liquid outlet shell 16. The crystals filtered by the filter screen 17 remain in the filter cylinder 12. As the crystals continue to aggregate, the filter cylinder 12 is driven away from the filter screen 17 by the second driving mechanism. At this time, the accommodating chamber 11 is connected with the discharge pipe 18. Under the gravity of the crystals themselves and the push of the piston column 13, the crystals fall and are collected.

[0045] Reference Figure 1 , Figure 2 , Figure 3 The frame 1 is placed on a horizontal plane, and the accommodating chamber 11 extends in the horizontal direction. In this embodiment, the accommodating chamber 11 is set to four. In other embodiments, the number of accommodating chambers 11 can be selected according to actual needs. The first driving mechanism includes a driving motor 3, a driving wheel 34, a transmission belt 35, a transmission wheel 31, a crankshaft 32 and a connecting rod 33. The driving motor 3 is fixedly mounted on the frame 1, the driving wheel 34 is connected to the driving shaft of the driving motor 3, the transmission wheel 31 is rotatably connected to the frame 1 and is arranged directly above the driving wheel 34, the transmission belt 35 is sleeved on the driving wheel 34 and the transmission wheel 31, the crankshaft 32 and the transmission wheel 31 are fixedly connected, one end of the connecting rod 33 is hinged to the edge of the crank of the crankshaft 32, and the other end of the connecting rod 33 is hinged to the end of the piston column 13.

[0046] Reference Figure 4The filter cartridge 12 can slide laterally in the accommodating chamber 11 to facilitate unloading of the filtered crystals. The second driving mechanism includes a linear driver 4 and a movable plate 41. The linear driver 4 can drive the movable plate 41 to move laterally. The linear driver 4 is fixedly mounted on the frame 1. One end of the movable plate 41 is fixedly connected to the driving shaft of the linear driver 4, and the other end of the movable plate 41 is fixedly connected to the outer wall of the filter cartridge 12. In this embodiment, the linear driver 4 and the movable plate 41 are both set to two, and the two linear drivers 4 and the two movable plates 41 are respectively located on the upper and lower sides of the filter cartridge 12.

[0047] Reference Figure 1 and Figure 2 The feed pipe 14 passes through the center of the liquid outlet shell 16 and the center of the filter screen 17 in sequence. A solenoid valve 15 is installed at the end of the feed pipe 14 away from the filter screen 17. The solenoid valve 15 is a valve that uses the principle of electromagnetic induction to control the flow of liquid or gas. It can open or close the fluid channel through an electrical signal. When the crystals need to be collected, the solenoid valve 15 can be closed to pause the entry of raw materials. A first one-way valve 141 is installed at the end of the feed pipe 14 close to the filter screen 17. The first one-way valve 141 can prevent the raw materials entering from the feed pipe 14 from flowing into the feed pipe 14 again.

[0048] Reference Figure 2 The liquid outlet housing 16 is fixedly connected to the frame 1, and a push plate 2 is slidably connected to the side of the discharge housing away from the filter screen 17. A support spring 21 is fixedly connected between the push plate 2 and the liquid outlet housing 16. A liquid outlet pipe 22 is fixedly connected to the bottom of the liquid outlet housing 16. A pressure relief valve 23 is installed in the liquid outlet pipe 22. The pressure relief valve 23 is a safety device for regulating and limiting the pressure in the system. Its main function is to automatically open when the system pressure exceeds the set value, thereby releasing excess pressure. Due to the setting of the pressure relief valve 23, there is a certain pressure in the liquid outlet housing 16, which will cause the original liquid to push the push plate 2 to move. When the piston column 13 moves in the direction away from the liquid outlet housing 16, under the suction of the piston column 13 and the push of the push plate 2, the original liquid can flush the filter screen 17, thereby reducing the probability of clogging of the filter screen 17, so as to facilitate the continuous filtration work and improve the filtration efficiency.

[0049] Reference Figure 1 , Figure 2 and Figure 4A blowing shell 5 is fixedly connected to the top of the frame 1. The interior of the blowing shell 5 is hollow, and one side of the blowing shell 5 is fixedly connected to an air inlet pipe 51 connected to the interior of the blowing shell 5. When the filter cartridge 12 moves away from the blowing shell 5, the blowing shell 5, the accommodating chamber 11 and the discharge pipe 18 are connected to each other. By introducing airflow into the air inlet pipe 51, the airflow can be blown into the accommodating chamber 11 along the blowing shell 5 to assist the crystals to fall into the discharge pipe 18. At the same time, the filter screen 17 can be blown to reduce the probability of the crystals sticking to the filter screen 17, which is beneficial to the cleaning of the filter screen 17.

[0050] The implementation principle of a sugar alcohol filtering device in an embodiment of the present invention is: when it is necessary to filter the sugar alcohol crystals, first start the driving motor 3 to drive the driving wheel 34 to rotate, the driving wheel 34 rotates the transmission wheel 31 through the transmission belt 35, and the transmission wheel 31 drives the crankshaft 32 to rotate. As the crankshaft 32 rotates, the crankshaft 32 drives the piston column 13 to reciprocate in the horizontal direction through the connecting rod 33.

[0051] When the piston column 13 moves in a direction away from the feed pipe 14, the raw material can be continuously extracted, and the raw material flows into the filter cylinder 12 from the feed pipe 14. When the piston column 13 moves in a direction close to the feed pipe 14, the material entering the filter cylinder 12 can be squeezed, so that the raw liquid passes through the filter screen 17 and enters the liquid outlet shell 16, while the sugar alcohol crystals remain in the filter cylinder 12 under the obstruction of the filter screen 17. As the filtering work continues, more and more crystals gather in the filter cylinder 12. Then, the solenoid valve 15 is closed to stop the feeding of the feed pipe 14, and air is ventilated into the air inlet pipe 51. The linear drive 4 is started to drive the filter cylinder 12 to move in a direction away from the feed pipe 14, and the crystals fall into the discharge pipe 18 for collection.

[0052] After the crystals are collected, the linear drive 4 is started to drive the filter cartridge 12 to move toward the feed pipe 14 to reset the filter cartridge 12, and then the solenoid valve 15 is opened to continue to extract the raw materials, so as to improve the filtering efficiency.

[0053] In a second aspect, the present invention provides a filtration process for sugar alcohols, which is applied to a filtration device for sugar alcohols in the first aspect, and the process is:

[0054] S1, start the driving motor 3 to make the connecting rod 33 drive the piston column 13 to move back and forth horizontally, and with the reciprocating movement of the piston column 13, the raw liquid can be continuously extracted into the filter cylinder 12;

[0055] S2, when the piston rod 13 moves toward the direction close to the feed pipe 14, it can exert pressure on the stock liquid so that part of the stock liquid passes through the filter screen 17 and enters the liquid outlet housing 16, and the crystals are blocked by the filter screen 17 and remain in the filter cartridge 12;

[0056] S3, as the filtering work continues, when the crystals in one of the filter cartridges 12 continue to increase, the solenoid valve 15 on the feed pipe 14 is closed, and the filter cartridge 12 is moved away from the filter screen 17, and the crystals fall into the discharge pipe 18 for collection;

[0057] S4, after the collection is completed, the filter cartridge 12 is reset, and the solenoid valve 15 is opened to continue the filtering work.

[0058] In process S2: by setting the pressure relief valve 23, a certain pressure is created in the liquid outlet housing 16, and when the piston column 13 moves away from the filter screen 17, the original liquid flushes the filter screen 17 under the action of the suction force of the push plate 2 and the piston column 13.

[0059] In process S3 : when the crystals fall into the discharge pipe 18 , air flow is introduced into the air inlet pipe 51 , and the air flow can blow the crystals down and clean the filter screen 17 .

[0060] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A sugar alcohol filtering device, comprising a frame, characterized in that: The frame is provided with a plurality of transversely extending accommodating chambers, the plurality of accommodating chambers are evenly spaced one by one, a filter cartridge is slidably connected in each accommodating chamber, a piston column is slidably connected in each filter cartridge, a feed pipe corresponding to the filter cartridge one by one and connected to the inside of the filter cartridge is fixedly connected to the frame, a solenoid valve for controlling the entry of raw materials is installed on each feed pipe, a first one-way valve is installed at one end of the feed pipe away from the solenoid valve, the first one-way valve is used to prevent the raw materials entering the filter cartridge from flowing back to the feed pipe, a liquid outlet housing is connected to the side of the filter cartridge close to the feed pipe, a filter screen is fixedly sleeved on the outer wall of the feed pipe close to the filter cartridge, and a discharge pipe for discharging crystals is provided at the lower part of the frame; A push plate is slidably connected to the side of the liquid outlet housing away from the filter screen, a support spring is fixedly connected between the push plate and the material outlet housing, a liquid outlet pipe is fixedly connected to the bottom of the liquid outlet housing, and a pressure relief valve is installed in the liquid outlet pipe; When the piston column moves away from the liquid outlet housing, the push plate pushes the original liquid to flush the filter screen; The frame is fixedly connected with a blowing shell, the inside of the blowing shell is hollow, and one side of the blowing shell is fixedly connected with an air inlet pipe connected with the inside of the blowing shell. When the filter cartridge moves in a direction away from the blowing shell, the blowing shell, the accommodating cavity and the discharge pipe are connected with each other. By introducing airflow into the air inlet pipe, the airflow can be blown into the accommodating cavity along the blowing shell to assist the crystals to fall into the discharge pipe. At the same time, the filter screen can be blown to reduce the probability of the crystals sticking to the filter screen, which is conducive to cleaning the filter screen. The feed pipe is arranged through the center of the filter screen.

2. The filtration device for sugar alcohol according to claim 1, characterized in that: A driving motor is installed on the frame, and a transmission wheel is rotatably connected to the frame. The driving shaft of the driving motor can drive the transmission wheel to rotate through a belt drive. A crankshaft is fixedly connected to one side of the transmission wheel, and a connecting rod is hinged on the crankshaft. The end of the connecting rod away from the crankshaft is hinged to the piston column.

3. A sugar alcohol filtering device according to claim 2, characterized in that: A linear drive is fixedly installed on the frame, a driving shaft of the linear drive is fixedly connected with a moving plate, and the moving plate is fixedly connected to the filter cartridge.

4. The filtration device for sugar alcohol according to claim 1, characterized in that: The diameter of the discharge pipe gradually decreases from top to bottom.

5. A filtration process for sugar alcohols, characterized in that: A filtration device for sugar alcohols as claimed in claim 3, wherein the process is: S1, start the driving motor to make the connecting rod drive the piston column to move back and forth horizontally. With the reciprocating movement of the piston column, the original liquid can be continuously drawn into the filter cylinder; S2, when the piston column moves toward the direction close to the feed pipe, it can exert pressure on the stock liquid so that part of the stock liquid passes through the filter screen into the liquid outlet housing, and the crystals remain in the filter cylinder under the obstruction of the filter screen; S3, as the filtering work continues, when the crystals in one of the filter cartridges continue to increase, the solenoid valve on the feed pipe is closed, and the filter cartridge is moved away from the filter screen, and the crystals fall into the discharge pipe for collection; S4, after the collection is completed, the filter cartridge is reset and the solenoid valve is opened to continue the filtering work.

6. The filtration process of a sugar alcohol according to claim 5, characterized in that: In process S2, a certain pressure is created in the liquid outlet housing by setting a pressure relief valve, and when the piston column moves away from the filter screen, the filter screen is flushed by the original liquid under the action of the suction force of the push plate and the piston column.

7. The filtration process of a sugar alcohol according to claim 5, characterized in that: In process S3, when the crystals fall into the discharge pipe, air flow is introduced into the air inlet pipe, and the air flow can blow the crystals down and clean the filter screen.

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