Impurity filtering device for producing 5, 5-dimethylhydantoin

Abstract

The utility model provides an impurity filtering device for producing 5, 5-dimethyl hydantoin, which comprises an outer barrel body, a centrifugal filtering barrel, a brush roller and a transmission structure, an outer gear ring is mounted on the outer wall of a barrel body of the centrifugal filter barrel; the output end of the motor is fixedly connected with a first gear; the bottom of the first gear is meshed with the outer gear ring; the second gear is mounted on the brush roller, and the third gear is mounted on the water inlet pipe; the first gear is meshed with the second gear, the second gear is meshed with the third gear, so that the motor works to drive the centrifugal filter barrel, the brush roller and the spray head to rotate at the same time, and the tooth pitch of meshing teeth on the second gear is smaller than that of meshing teeth of the outer gear ring; the tooth pitch of meshing teeth on the third gear is smaller than that of meshing teeth on the second gear, the rotating speeds of the centrifugal filter barrel, the spraying head and the brush roller are different, relative movement is generated, the brush roller cleans the inner wall of the centrifugal filter barrel, the spraying head sprays the inner wall of the centrifugal filter barrel and the brush roller, and the cleaning effect is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of 5,5-dimethylhydantoin production, in particular to an impurity filtering device for 5,5-dimethylhydantoin production. Background Art

[0002] 5,5-Dimethylhydantoin is an organic compound with the molecular formula C5H8N2O2, also known as 5,5-dimethylhydantoin (hereinafter referred to as DMH); it appears as a white crystalline powder. It is easily soluble in water, ethanol, ether, ethyl acetate, etc., but insoluble in aliphatic hydrocarbons and trichloroethylene; it is stable when dry.

[0003] 5,5-dimethylhydantoin is an important organic synthesis intermediate with a wide range of uses. It is a heterocyclic compound with a certain rigid skeleton. 5,5-dimethylhydantoin is commonly used to synthesize halogenated hydantoin and hydroxymethylhydantoin. It can be used to prepare a series of valuable derivatives through substitution reactions, including dibromohydantoin, dichlorohydantoin, bromochlorohydantoin, diiodohydantoin, monohydroxymethylhydantoin, dihydroxymethylhydantoin, allylhydantoin, propargylhydantoin, etc. It can also be used to synthesize hydantoin-type epoxy resins and hydantoin-type formaldehyde resins. In addition, dimethylglycine can be obtained by heating and hydrolysis; it can react with metal organic compounds to produce insecticides, acaricides, etc. It is widely used in the production and application fields of organic chemical synthesis, medicine, plastics, food, cosmetics, pesticides, electroplating complexing agents, etc.

[0004] With the advancement of science and technology, various industries are developing rapidly. The preparation method of 5,5-dimethylhydantoin is constantly being studied. However, in the preparation process of different 5,5-dimethylhydantoin, there is always a core step: centrifugal filtration of 5,5-dimethylhydantoin crude aqueous solution to obtain 5,5-dimethylhydantoin; in order to meet the demand for 5,5-dimethylhydantoin and improve the production efficiency of 5,5-dimethylhydantoin, it is imperative to improve the impurity filtration device used in the production of 5,5-dimethylhydantoin.

[0005] After searching, the utility model patent with application number "CN202322103361.6" discloses a centrifugal filtration device for refining fluazifop technical, including an outer barrel, an inspection port and a cover plate provided with a sealing installation for the inspection port, and a discharge pipe for discharging the filtered material is also provided on the outer barrel. The utility model overcomes the shortcomings of the prior art, has a reasonable design, utilizes the relative rotation between the components, and cleans the filter holes synchronously in the centrifugal filtration treatment stage by cleaning, effectively avoiding the occurrence of filter hole blockage caused by long-term use, and has high social use value and application prospects.

[0006] The centrifugal filter device cleans the filter holes simultaneously during the centrifugal filtration stage, effectively avoiding the clogging of the filter holes caused by long-term use, thereby improving the filtration efficiency; however, impurities are attached to the inner wall of the filter, and the centrifugal filter device cleans the outside of the filter holes, which can only open the filter holes briefly and cannot completely remove the attached impurities; at the same time, the filtration effect of a single filtration is poor, and incomplete filtration may occur.

[0007] In summary, there is an urgent need for an impurity filtering device for the production of 5,5-dimethylhydantoin to solve the above problems. Utility Model Content

[0008] In order to make up for the above shortcomings, the utility model provides an impurity filtering device for the production of 5,5-dimethylhydantoin, which is used to solve the problem that the existing centrifugal filtering device cannot completely remove the attached impurities; at the same time, the filtering effect of a single filtration is poor, and there are problems such as incomplete filtration.

[0009] The utility model is achieved in this way:

[0010] An impurity filtering device for producing 5,5-dimethylhydantoin comprises an outer barrel body, a centrifugal filter barrel, a brush roller and a transmission structure; the transmission structure is fixedly mounted on the upper surface of the outer barrel body; the centrifugal filter barrel is arranged inside the outer barrel body, and a first filter layer is arranged on the barrel wall of the centrifugal filter barrel; the centrifugal filter barrel is connected to the bottom of the outer barrel body and is provided with a second filter layer; the brush roller is arranged inside the centrifugal filter barrel and is inscribed with the inner wall of the centrifugal filter barrel.

[0011] A water inlet pipe and a feed pipe are arranged above the centrifugal filter barrel, and a discharge pipe is arranged below; the feed pipe enters the centrifugal filter barrel through the center of the circle at the top of the outer barrel body; the water inlet pipe is arranged on one side of the water inlet pipe, and a plurality of spray heads are arranged at the bottom of the water inlet pipe.

[0012] The transmission structure includes a first gear, a second gear, a third gear, an outer gear ring and a motor; the motor is fixedly mounted above the outer barrel body and is arranged on the side of the water inlet pipe away from the feed pipe; the outer gear ring is fixedly mounted on the outer side of the barrel body of the centrifugal filter barrel; the output end of the motor is fixedly connected to the first gear through a connecting rod; one side of the bottom of the first gear is meshed with the outer gear ring; the second gear is mounted on the brush roller, and the third gear is mounted on the water inlet pipe; one side of the top of the first gear is meshed with the second gear, and the second gear is meshed with the third gear, so that the operation of the motor can simultaneously drive the centrifugal filter barrel, the brush roller and the spray head to rotate.

[0013] A discharge pipe is arranged at the bottom of the outer barrel body, and the outer wall from the second filter layer to the discharge pipe is inclined so that materials cannot be accumulated on the barrel wall, thereby improving the yield.

[0014] Preferably, the second gear and the third gear are both arranged inside the outer barrel body and outside the centrifugal filter barrel.

[0015] Preferably, the meshing pitch of the second gear is smaller than the meshing pitch of the outer gear ring.

[0016] Preferably, the meshing tooth pitch on the third gear is smaller than the meshing tooth pitch of the second gear.

[0017] The beneficial effects of the utility model compared with the prior art are:

[0018] 1. The impurity filtering device for producing 5,5-dimethylhydantoin shown in the utility model comprises a first gear, a second gear, a third gear, an outer gear ring and a motor by setting the transmission structure; the motor is fixedly mounted above the outer barrel body and arranged on the side of the water inlet pipe away from the feed pipe; the outer gear ring is fixedly mounted on the outer side of the barrel body of the centrifugal filter barrel; the output end of the motor is fixedly connected to the first gear; one side of the bottom of the first gear is meshed with the outer gear ring; the second gear is mounted on the brush roller, and the third gear is mounted on the water inlet pipe; the top of the first gear One side of the motor is meshed with the second gear, and the second gear is meshed with the third gear, so that the operation of the motor can drive the centrifugal filter barrel, the brush roller and the spray head to rotate at the same time, and the meshing tooth pitch of the second gear is smaller than the meshing tooth pitch of the outer gear ring; the meshing tooth pitch of the third gear is smaller than the meshing tooth pitch of the second gear, so that under the drive of one motor, the rotation speeds of the centrifugal filter barrel, the spray head and the brush roller are different, and relative motion is generated. The brush roller cleans the inner wall of the centrifugal filter barrel, and the spray head continuously sprays the inner wall of the centrifugal filter barrel and the brush roller, thereby enhancing the cleaning effect and prompting impurities to flow to the discharge port.

[0019] 2. The impurity filtering device for the production of 5,5-dimethylhydantoin shown in the utility model is configured by arranging the centrifugal filter barrel inside the outer barrel body, and a first filter layer is arranged on the barrel wall of the centrifugal filter barrel; the centrifugal filter barrel is connected to the bottom of the outer barrel body and is provided with a second filter layer; the material after a centrifugal filtration treatment will pass through the second filter layer under the action of gravity and be filtered again to achieve the purpose of improving the purity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a three-dimensional structural schematic diagram of an impurity filtering device for producing 5,5-dimethylhydantoin according to the utility model;

[0022] Figure 2 This is a front view structural schematic diagram of an impurity filtering device for producing 5,5-dimethylhydantoin according to the utility model;

[0023] Figure 3 for Figure 2 The cross-sectional structure of Figure 1 ;

[0024] Figure 4 for Figure 2 The cross-sectional structure of Figure 2 ;

[0025] Figure 5 This is a schematic diagram of the top view of the impurity filtering device for producing 5,5-dimethylhydantoin of the utility model (without the upper surface of the outer barrel);

[0026] Figure 6 for Figure 5 The cross-sectional structure of Figure 1 ;

[0027] Figure 7 for Figure 5 The cross-sectional structure of Figure 2 .

[0028] In the figure: 1. outer barrel; 2. motor; 3. water inlet pipe; 4. feed pipe; 5. discharge pipe; 6. discharge pipe; 7. connecting rod; 8. first gear; 9. second gear; 10. third gear; 11. outer gear ring; 12. centrifugal filter barrel; 13. first filter layer; 14. second filter layer; 15. spray head; 16. brush roller. DETAILED DESCRIPTION

[0029] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0030] Embodiment 1:

[0031] See also Figure 1-7 , the utility model provides a technical solution:

[0032] An impurity filtering device for producing 5,5-dimethylhydantoin, comprising an outer barrel 1, a centrifugal filter barrel 12, a brush roller 16 and a transmission structure;

[0033] like Figure 2 As shown, the transmission structure is fixedly mounted on the upper surface of the outer barrel 1;

[0034] like Figure 3 As shown, the centrifugal filter barrel 12 is arranged inside the outer barrel body 1, and a first filter layer 13 is arranged on the barrel wall of the centrifugal filter barrel 12; the centrifugal filter barrel 12 is connected to the bottom of the outer barrel body 1 and is provided with a second filter layer 14; the material will be centrifugally filtered and filtered twice to improve the purity.

[0035] like Figure 7 As shown, the brush roller 16 is arranged inside the centrifugal filter barrel 12 and is inscribed with the inner wall of the centrifugal filter barrel 12 .

[0036] like Figure 4 As shown, a water inlet pipe 3 and a feed pipe 4 are arranged above the centrifugal filter barrel 12, and a discharge pipe 6 is arranged below; the feed pipe 4 enters the centrifugal filter barrel 12 through the center of the circle at the top of the outer barrel body 1; the water inlet pipe 3 is arranged on one side of the water inlet pipe 3, and a plurality of spray heads 15 are arranged at the bottom of the water inlet pipe 3.

[0037] The transmission structure includes a first gear 8, a second gear 9, a third gear 10, an outer gear ring 11 and a motor 2;

[0038] like Figure 3-Figure 5 As shown, the motor 2 is fixedly mounted above the outer barrel 1 and is arranged on the side of the water inlet pipe 3 away from the feed pipe 4; the outer gear ring 11 is fixedly mounted on the outer side of the barrel of the centrifugal filter barrel 12; the output end of the motor 2 is fixedly connected to the first gear 8 through the connecting rod 7; one side of the bottom of the first gear 8 is meshed with the outer gear ring 11; the second gear 9 is mounted on the brush roller 16, and the third gear 10 is mounted on the water inlet pipe 3;

[0039] It should be noted that the specific installation method, circuit connection method and control method of the third gear 10 and the water inlet pipe 3 in the present invention are all conventional designs, and the present invention will not elaborate on them in detail.

[0040] like Figure 6As shown, one side of the top of the first gear 8 is meshed with the second gear 9, and the second gear 9 is meshed with the third gear 10, and the meshing tooth pitch of the second gear 9 is smaller than the meshing tooth pitch of the outer gear ring 11; the meshing tooth pitch of the third gear 10 is smaller than the meshing tooth pitch of the second gear 9; so that the operation of the motor 2 can simultaneously drive the centrifugal filter barrel 12, the brush roller 16 and the spray head 15 to rotate; the rotation speeds of the centrifugal filter barrel 12, the spray head 15 and the brush roller 16 are all different, resulting in relative motion, and the spray head 15 and the brush roller 16 clean the inner wall of the centrifugal filter barrel 12.

[0041] like Figure 3-Figure 4 As shown, a discharge pipe 5 is provided at the bottom of the outer barrel body 1, and the outer wall from the second filter layer 14 to the discharge pipe 5 is inclined so that materials cannot accumulate on the barrel wall, thereby improving the yield.

[0042] like Figure 3 As shown, the second gear 9 and the third gear 10 are both arranged inside the outer barrel 1 and outside the centrifugal filter barrel 12; the upper surfaces of the second gear 9, the third gear 10 and the first gear 8 are in the same plane.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An impurity filtering device for producing 5,5-dimethylhydantoin, comprising an outer barrel (1), a centrifugal filter barrel (12), a brush roller (16) and a transmission structure; the transmission structure is fixedly mounted on the upper surface of the outer barrel (1); Features: The centrifugal filter barrel (12) is arranged inside the outer barrel body (1), and a first filter layer (13) is arranged on the barrel wall of the centrifugal filter barrel (12); the centrifugal filter barrel (12) is connected to the bottom of the outer barrel body (1) and is provided with a second filter layer (14); the brush roller (16) is arranged inside the centrifugal filter barrel (12) and is inscribed with the inner wall of the centrifugal filter barrel (12).

2. An impurity filtering device for producing 5,5-dimethylhydantoin according to claim 1, It is characterized in that A water inlet pipe (3) and a feed pipe (4) are arranged above the centrifugal filter barrel (12), and a discharge pipe (6) is arranged below the centrifugal filter barrel (12); the feed pipe (4) enters the centrifugal filter barrel (12) through the center of the circle at the top of the outer barrel body (1); the water inlet pipe (3) is arranged on one side of the water inlet pipe (3), and a plurality of spray heads (15) are arranged at the bottom of the water inlet pipe (3).

3. An impurity filtering device for producing 5,5-dimethylhydantoin according to claim 2, It is characterized in that The transmission structure comprises a first gear (8), a second gear (9), a third gear (10), an outer gear ring (11) and a motor (2); the motor (2) is fixedly mounted above the outer barrel (1) and is arranged on a side of the water inlet pipe (3) away from the feed pipe (4); the outer gear ring (11) is fixedly mounted on the outer side of the barrel of the centrifugal filter barrel (12); the output end of the motor (2) is fixedly connected to the first gear (8) via a connecting rod (7); and one side of the bottom of the first gear (8) is meshed with the outer gear ring (11).

4. An impurity filtering device for producing 5,5-dimethylhydantoin according to claim 3, It is characterized in that The second gear (9) is arranged on the brush roller (16), and the third gear (10) is arranged on the water inlet pipe (3); one side of the top of the first gear (8) is meshed with the second gear (9), and the second gear (9) is meshed with the third gear (10).

5. An impurity filtering device for producing 5,5-dimethylhydantoin according to claim 4, It is characterized in that The meshing tooth pitch of the second gear (9) is smaller than the meshing tooth pitch of the outer gear ring (11).

6. An impurity filtering device for producing 5,5-dimethylhydantoin according to claim 4, It is characterized in that The meshing tooth pitch of the third gear (10) is smaller than the meshing tooth pitch of the second gear (9).

7. The impurity filtering device for producing 5,5-dimethylhydantoin according to claim 1, It is characterized in that A discharge pipe (5) is arranged at the bottom of the outer barrel (1), and the outer wall from the second filter layer (14) to the discharge pipe (5) is arranged inclined.

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