Filtering device for isomaltulose production

Abstract

The utility model provides a filtering device for isomaltulose production, which is characterized in that a filtering tank body comprises an outer tank shell and an inner tank shell, and a preset distance is formed between the outer tank shell and the inner tank shell to form a cavity; a first filter screen, a second filter screen and a third filter screen are arranged on the inner wall of the inner tank shell. The stirring assembly comprises a motor, a stirring shaft and scraping pieces, the scraping pieces comprise the first scraping piece, the second scraping piece and the third scraping piece, brush heads are arranged at the bottoms of the first scraping piece, the second scraping piece and the third scraping piece, the first scraping piece is arranged above the first filter screen, and the ends, away from the first scraping piece, of the brush heads abut against the first filter screen; the second scraping piece is arranged above the second filter screen, and the end, away from the second scraping piece, of the brush head abuts against the second filter screen. The third scraping piece is arranged above the third filter screen, and the end, away from the third scraping piece, of the brush head abuts against the third filter screen. During filtering, the first scraping piece, the second scraping piece and the third scraping piece continuously rotate under the cooperation of the motor and the stirring shaft, so that a solution stirring effect can be achieved, and the filtering efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering equipment, in particular to a filtering device for producing isomaltulose. Background Art

[0002] Isomaltulose is a natural sugar found in products such as sugar cane and honey. It has the function of not causing tooth decay. It has been extensively researched and developed all over the world. In 1954, it was successfully converted and produced using sucrose as raw material. In 1984, Japan's Shin-Mitsui Co., Ltd. successfully developed a special enzyme technology to industrialize its production in large quantities. Isomaltulose is also a special sweetener with unique digestibility and absorbability, and is widely used in various foods and sweeteners. Isomaltulose has a low content in nature and is difficult to synthesize using chemical methods. Therefore, it is mainly produced by microbial conversion and enzyme isomerization of sucrose, mainly including bacterial fermentation to convert sucrose and bacterial cell immobilization. So far, it has been found that a variety of microorganisms can ferment sucrose to convert isomaltulose, such as Serratia plymuthica ATCC15928, Erwinia rhapontici NX-5, Klebsiella sp. LX-3, etc., all have the ability to produce isomaltulose. At present, the domestic production of isomaltulose fermentation method mainly uses sucrose as raw material, passes the sucrose solution through an immobilized α-glucosyltransferase reaction column or tank, and obtains a conversion liquid containing isomaltulose and other miscellaneous sugars converted by the enzyme, and passes the obtained conversion liquid into a miscellaneous sugar removal reaction tank containing immobilized yeast to remove miscellaneous sugars other than isomaltulose in the conversion liquid, and then removes the residue from the conversion liquid after the miscellaneous sugar removal to obtain a clear liquid containing isomaltulose. Regardless of the method used to produce isomaltulose, filtration is involved. When existing filtration devices filter isomaltulose mixtures, they generally use their own gravity and then filter through a filter. However, the viscosity of its aqueous solution is only slightly lower than that of sucrose of the same concentration. The high viscosity leads to its weak fluidity. After accumulation on the filter plate, the filtration speed is greatly reduced, which prolongs the filtration time and leads to low filtration efficiency. Summary of the invention

[0003] The utility model aims to provide a filtering device for isomaltulose production, wherein a scraper is arranged on a filter plate to improve the fluidity of liquid, and improve the filtering effect and filtering efficiency.

[0004] The utility model provides a filtering device for isomaltulose production, including a filtering tank body. The filtering tank body includes an outer tank shell and an inner tank shell, and a cavity is formed between the outer tank shell and the inner tank shell at a predetermined distance; a first filter screen, a second filter screen and a third filter screen are arranged on the inner wall of the inner tank shell, and the first filter screen, the second filter screen and the third filter screen are arranged in sequence from the top of the tank body downward. It also includes a stirring assembly, and the stirring assembly includes a motor, a stirring shaft and a scraper. The motor is fixed to the bottom of the outer tank shell, one end of the stirring shaft is connected to the output end of the motor, and the other end extends into the interior of the filtering tank body and passes through the third filter screen, the second filter screen and the first filter screen in sequence. The scraper is fixedly connected to the stirring shaft, and the scraper includes a first scraper, a second scraper and a third scraper. The first scraper, the second scraper and the third scraper are all provided with a brush head at the bottom. The first scraper is arranged above the first filter mesh and the brush head is abutted against the first filter mesh at an end away from the first scraper. The second scraper is arranged above the second filter mesh and the brush head is abutted against the second filter mesh at an end away from the second scraper. The third scraper is arranged above the third filter mesh and the brush head is abutted against the third filter mesh at an end away from the third scraper.

[0005] Preferably, a second brush head is further provided on one end of the first scraper, the second scraper and the third scraper away from the stirring shaft, and one end of the second brush head away from the stirring shaft abuts against the inner wall of the inner tank shell.

[0006] Preferably, the filter hole diameters of the first filter screen, the second filter screen and the third filter screen decrease in sequence.

[0007] Preferably, a first water retaining member and a second water retaining member are provided in the cavity, one end of the first water retaining member is fixed to the outer side wall of the inner tank shell, and the other end is spaced a predetermined distance from the inner side wall of the outer tank shell; one end of the second water retaining member is fixed to the inner side wall of the outer tank shell, and the other end is spaced a predetermined distance from the outer side wall of the inner tank shell.

[0008] Preferably, the first water retaining member and the second water retaining member are arranged in a cross-spaced manner.

[0009] Preferably, the first water retaining member and the second water retaining member are both arc-shaped members.

[0010] Preferably, a suction port is provided on the side wall of the filter tank under the third filter screen, and the suction port is connected to a vacuum pump.

[0011] Preferably, a protective member is provided under the third filter screen, and the protective member covers the air suction port to prevent the solution from entering the air suction port, and an air hole is provided on a side of the protective member away from the third filter screen.

[0012] Preferably, the filter tank body is also provided with a water inlet, a water outlet, a liquid inlet and a liquid outlet, the water inlet is arranged at the bottom of the filter tank body and is connected to the cavity, the water outlet is arranged at the top of the filter tank body and is connected to the cavity; the liquid inlet is arranged at the top of the filter tank body and is connected to the inside of the filter tank body, and the liquid outlet is arranged at the bottom of the filter tank body and is connected to the inside of the filter tank body.

[0013] Preferably, a fourth filter screen is provided at the liquid outlet.

[0014] Beneficial effects of the utility model: The utility model provides a filtering device for isomaltulose production, which realizes the effect of layer-by-layer filtering by arranging the first filter screen, the second filter screen and the third filter screen in the filtering tank body, thereby reducing impurities in the filtrate, and at the same time, the first scraper, the second scraper and the third scraper are respectively arranged on the first filter screen, the second filter screen and the third filter screen, and the first scraper, the second scraper and the third scraper are continuously rotated under the cooperation of the motor and the stirring shaft during filtering, which can play a stirring role in the solution and improve the filtering efficiency. At the same time, a brush head is arranged at the lower end of the first scraper, the second scraper and the third scraper, and the brush head can clean the first filter screen, the second filter screen and the third filter screen respectively during the rotation process, so as to prevent the filter holes from being blocked due to the high viscosity of the solution during filtering. In addition, the filtering tank body is arranged in the form of an outer tank shell and an inner tank shell, and hot water can be introduced into the cavity to realize the heat preservation of the liquid in the tank, so as to prevent the isomaltulose from solidifying due to low temperature, affecting the fluidity of the raw materials, and then affecting the filtering speed or even blocking the filter holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the structure of a filtering device for producing isomaltulose.

[0016] Figure 2 for Figure 1 Schematic diagram of the structure of part A.

[0017] In the figure: 1-outer tank shell, 2-inner tank shell, 3-first filter screen, 4-second filter screen, 5-third filter screen, 6-scraper, 7-stirring shaft, 8-first water retaining member, 9-second water retaining member, 10-air suction port, 11-protective member, 12-vacuum pump, 13-liquid outlet, 14-fourth filter screen, 15-motor, 16-brush head, 17-second brush head. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings. The described embodiments are only a part of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0019] refer to Figure 1 and Figure 2 , this embodiment provides a filtering device for isomaltulose production, including a filtering tank body. The filtering tank body includes an outer tank shell 1 and an inner tank shell 2, and a cavity is formed between the outer tank shell 1 and the inner tank shell 2 at a predetermined distance; a first filter screen 3, a second filter screen 4 and a third filter screen 5 are arranged on the inner wall of the inner tank shell 2, and the first filter screen 3, the second filter screen 4 and the third filter screen 5 are arranged in sequence from the top of the tank body downward. It also includes a stirring assembly, and the stirring assembly includes a motor 15, a stirring shaft 7 and a scraper 6. The motor 15 is fixed at the bottom of the outer tank shell 1, and one end of the stirring shaft 7 is connected to the output end of the motor 15, and the other end extends into the interior of the filtering tank body and passes through the third filter screen 5, the second filter screen 4 and the first filter screen 3 in sequence. The scraper 6 is fixedly connected to the stirring shaft 7, and the scraper 6 includes a first scraper, a second scraper and a third scraper. The first scraper, the second scraper and the third scraper are all provided with a brush head 16 at the bottom. The first scraper is arranged above the first filter 3 and the brush head 16 abuts against the first filter 3 away from the first scraper end. The second scraper is arranged above the second filter 4 and the brush head 16 abuts against the second filter 4 away from the second scraper end. The third scraper is arranged above the third filter 5 and the brush head 16 abuts against the third filter 5 away from the third scraper end. When filtering, the motor 15 is operated, and the motor 15 drives the stirring shaft 7 to rotate, thereby causing the first scraper, the second scraper and the third scraper to rotate on the first filter 3, the second filter 4 and the third filter 5 respectively, which can play a good stirring role on the filtrate and improve the filtering efficiency. At the same time, the brush heads 16 at the lower ends of the first scraper, the second scraper and the third scraper can clean the first filter screen 3, the second filter screen 4 and the third filter screen 5 respectively when rotating to prevent solid matter from accumulating on the filter screen and clogging the filter holes. It should be noted that the side walls of the filter tank body where the first filter screen 3, the second filter screen 4 and the third filter screen 5 are located are provided with discharge ports for cleaning out the filter residues remaining on the filter screen after filtration.

[0020] A second brush head 17 is further provided on one end of the first scraper, the second scraper and the third scraper away from the stirring shaft 7 , and one end of the second brush head 17 away from the stirring shaft 7 abuts against the inner wall of the inner tank shell 2 .

[0021] The pore diameters of the first filter 3, the second filter 4 and the third filter 5 decrease in sequence. The first filter 3 is responsible for intercepting larger particles of solid matter, the second filter 4 is responsible for intercepting medium particles of solid matter, and the third filter 5 is responsible for intercepting small particles of solid matter. Layer by layer filtering can achieve better filtering effect.

[0022] A first water retaining member 8 and a second water retaining member 9 are provided in the cavity, wherein one end of the first water retaining member 8 is fixed to the outer side wall of the inner tank shell 2, and the other end is spaced a predetermined distance from the inner side wall of the outer tank shell 1; one end of the second water retaining member 9 is fixed to the inner side wall of the outer tank shell 1, and the other end is spaced a predetermined distance from the outer side wall of the inner tank shell 2. The first water retaining member 8 and the second water retaining member 9 are arranged crosswise and spaced apart. Both the first water retaining member 8 and the second water retaining member 9 are arc-shaped members. By providing the first water retaining member 8 and the second water retaining member 9, the retention time of hot water can be greatly extended and its heat preservation effect can be improved.

[0023] The side wall of the filter tank under the third filter screen 5 is provided with an air suction port 10, which is connected to a vacuum pump 12. When filtering, the vacuum pump 12 is turned on to extract part of the air in the filter tank, thereby increasing the vacuum degree inside the filter tank and accelerating the filtering speed.

[0024] A protective member 11 is provided under the third filter screen 5, and the protective member 11 covers the air suction port 10 to prevent the solution from entering the air suction port 10, and an air hole is provided on the side of the protective member 11 away from the third filter screen 5. The protective member 11 can protect the air suction port 10 and prevent liquid from entering the air suction port 10 and damaging the vacuum pump 12. Preferably, as shown in the figure, the protective member 11 is fixed to the inner wall of the filter tank body, and the cross-section of the protective member 11 is a trapezoid, wherein one side of the trapezoid is close to the bottom of the third filter screen 5, and the solution filtered by the third filter screen 5 can be diverted to a place farther away from the air suction port 10. Symmetrically to the side, the other side away from the third filter screen 5 is provided with some air holes for the flow of gas.

[0025] The filter tank body is also provided with a water inlet, a water outlet, a liquid inlet and a liquid outlet 13. The water inlet is arranged at the bottom of the filter tank body and is connected to the cavity, and the water outlet is arranged at the top of the filter tank body and is connected to the cavity; the liquid inlet is arranged at the top of the filter tank body and is connected to the inside of the filter tank body, and the liquid outlet 13 is arranged at the bottom of the filter tank body and is connected to the inside of the filter tank body.

[0026] A fourth filter screen 14 is disposed at the liquid outlet 13 , and the fourth filter screen 14 filters the clear liquid again, thereby further improving the quality of the clear liquid.

[0027] The utility model provides a filtering device for isomaltulose production, which gradually separates solids from a solution by adopting a three-stage filtering form, and a rotatable scraper is arranged on each layer of the filter screen, which can play a good stirring role and a cleaning role on the filter screen during filtering, thereby improving the filtering speed.

[0028] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model, and do not limit the utility model to the specific implementation methods described. Obviously, other modifications and changes can be made according to the content of this specification. The embodiments selected and specifically described in this specification are to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can understand and use the utility model well. It is not a limitation of the utility model. Any solution after simple deformation of the utility model belongs to the protection scope of the utility model.

Claims

1. A filtering device for producing isomaltulose, comprising a filtering tank, characterized in that: The filtering tank body comprises an outer tank shell and an inner tank shell, wherein a cavity is formed between the outer tank shell and the inner tank shell at a predetermined distance; a first filter screen, a second filter screen and a third filter screen are arranged on the inner wall of the inner tank shell, and the first filter screen, the second filter screen and the third filter screen are arranged in sequence from the top of the tank body downward; and a stirring assembly is also included, wherein the stirring assembly comprises a motor, a stirring shaft and a scraper, wherein the motor is fixed at the bottom of the outer tank shell, one end of the stirring shaft is connected to the output end of the motor, and the other end extends into the interior of the filtering tank body and passes through the third filter screen, The second filter screen and the first filter screen; the scraper is fixedly connected to the stirring shaft, the scraper includes a first scraper, a second scraper and a third scraper, and the first scraper, the second scraper and the third scraper are all provided with a brush head at the bottom, the first scraper is arranged above the first filter screen and the brush head is away from the first scraper end and abuts against the first filter screen, the second scraper is arranged above the second filter screen and the brush head is away from the second scraper end and abuts against the second filter screen, the third scraper is arranged above the third filter screen and the brush head is away from the third scraper end and abuts against the third filter screen.

2. The filtering device for producing isomaltulose according to claim 1, characterized in that: A second brush head is further provided on one end of the first scraper, the second scraper and the third scraper away from the stirring shaft, and one end of the second brush head away from the stirring shaft abuts against the inner wall of the inner tank shell.

3. The filtering device for producing isomaltulose according to claim 1, characterized in that: The filter hole diameters of the first filter screen, the second filter screen and the third filter screen decrease in sequence.

4. The filtering device for producing isomaltulose according to claim 1, characterized in that: A first water retaining member and a second water retaining member are provided in the cavity, wherein one end of the first water retaining member is fixed to the outer side wall of the inner tank shell, and the other end is spaced a predetermined distance from the inner side wall of the outer tank shell; one end of the second water retaining member is fixed to the inner side wall of the outer tank shell, and the other end is spaced a predetermined distance from the outer side wall of the inner tank shell.

5. The filtering device for producing isomaltulose according to claim 4, characterized in that: The first water stopper and the second water stopper are arranged crosswise and at intervals.

6. The filtering device for producing isomaltulose according to claim 4, characterized in that: The first water retaining member and the second water retaining member are both arc-shaped members.

7. The filtering device for producing isomaltulose according to claim 1, characterized in that: A suction port is arranged on the side wall of the filter tank under the third filter screen, and the suction port is connected to a vacuum pump.

8. The filtering device for producing isomaltulose according to claim 7, characterized in that: A protective piece is provided under the third filter screen, and the protective piece covers the air suction port to prevent the solution from entering the air suction port. An air hole is provided on a side of the protective piece away from the third filter screen.

9. The filtering device for producing isomaltulose according to claim 7, characterized in that: The filter tank body is also provided with a water inlet, a water outlet, a liquid inlet and a liquid outlet. The water inlet is arranged at the bottom of the filter tank body and is connected to the cavity, and the water outlet is arranged at the top of the filter tank body and is connected to the cavity; the liquid inlet is arranged at the top of the filter tank body and is connected to the inside of the filter tank body, and the liquid outlet is arranged at the bottom of the filter tank body and is connected to the inside of the filter tank body.

10. The filtering device for producing isomaltulose according to claim 9, characterized in that: A fourth filter screen is provided at the liquid outlet.

Images