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CN-117419525-B - Melamine drying roller

CN117419525BCN 117419525 BCN117419525 BCN 117419525BCN-117419525-B

Abstract

The invention discloses a melamine drying roller, which comprises a roller body, a feeding head arranged at one end of the roller body, a discharging mechanism arranged at the other end of the roller body, a plurality of rings of heating pipe assemblies annularly arranged in the roller body, and a steam flow dividing device arranged at one end of the roller body and used for supplying air to each heating pipe assembly. The problem that the drying efficiency is low because the existing drying roller is heated unevenly and cannot heat the roller in a temperature division interval when heating and drying products can be solved.

Inventors

  • ZHU HUANJIE
  • MO XIAOZHONG
  • TAN YAO
  • ZHU XIAOYAN

Assignees

  • 浙江同力重型机械制造有限公司

Dates

Publication Date
20260508
Application Date
20231031

Claims (6)

  1. 1. The melamine drying roller is characterized by comprising a roller body (4), a feeding head (1) arranged at one end of the roller body (4), a discharging mechanism (7) arranged at the other end of the roller body (4), a plurality of rings of heating pipe assemblies (6) annularly arranged in the roller body (4), and a steam distribution device (9) arranged at one end of the roller body (4) for supplying air to each heating pipe assembly (6), wherein high-pressure steam is rapidly and uniformly distributed to the air inlet end of each heating pipe assembly (6) through the steam distribution device (9) to be introduced, the inner wall of the roller body (4) is obliquely arranged along one end of the discharging mechanism (7), the axis of each heating pipe assembly (6) is parallel to the inner wall of the roller body (4), a plurality of supporting rings (5) are annularly arranged on the inner wall of the roller body (4), the heating pipe assemblies (6) are supported and fixed through the supporting rings (5), the wet melamine fed by the feeding head (1) is rapidly and uniformly distributed to the air inlet end of each heating pipe assembly (6) through the discharging mechanism (7) of the roller body (4), and the wet melamine is fed to different areas through different drying areas through the supporting rings (6), and the different wet areas are separated by the different wet melamine heating areas; The discharging mechanism (7) comprises a discharging cover (13) which is annularly arranged outside the roller body (4), a sealing rotating structure (12) is arranged between the discharging cover (13) and the roller body (4), the sealing rotating structure (12) comprises two rings of limiting flanges (20) which are fixedly annularly arranged outside the roller body (4), buffer devices (14) which are arranged at two sides of the discharging cover (13), and wear-resistant rings (21) which are arranged outside the buffer devices (14), and the outer sides of the buffer devices (14) are in contact sealing with the inner sides of the limiting flanges (20) through the wear-resistant rings (21); The buffer device (14) comprises a metal connecting ring (15) arranged between the discharging cover (13) and the limiting flange (20), and expansion rings (22) with two sides respectively arranged between the discharging cover (13) and the metal connecting ring (15), wherein the expansion rings (22) are of outwards-protruding arc structures, the metal connecting ring (15) is fixedly connected to the side face of the discharging cover (13) through the expansion rings (22), a sealing ring (23) is arranged at the joint of the two sides of the expansion rings (22), and the inner ring of the sealing ring (23) is in contact with the outer wall of the roller body (4); The buffer device is characterized in that a plurality of supporting screws (17) are arranged on the buffer device (14) in a ring mode, L-shaped brackets (18) are arranged on the supporting screws (17), rollers (19) are arranged at the bottoms of the brackets, springs (16) for inwards compressing the L-shaped brackets (18) are arranged on the supporting screws (17), and the rollers (19) are contacted with the outer side roller bodies (4) of the limiting flanges (20) after outwards extending out of the supporting screws (17) and the L-shaped brackets (18).
  2. 2. The melamine drying cylinder as claimed in claim 1, wherein the discharging mechanism (7) comprises a plurality of discharging ports (11) annularly arranged on one end side wall of the cylinder body (4), and a discharging guide port (10) arranged at the bottom of the discharging cover (13), the discharging ports (11) are arranged in the discharging cover (13), the cylinder body (4) and the discharging cover (13) are in sealing and opposite rotary connection through the sealing rotary structure (12), and melamine flowing out through the discharging ports (11) is discharged downwards from the discharging guide port (10) in a unified manner.
  3. 3. The melamine drying cylinder as claimed in claim 2, characterized in that the discharge hood (13) is further provided with an air inlet (8), the air inlet (8) is communicated with the discharge port (11), and the air entering the cylinder body (4) through the air inlet (8) is discharged from the feed head (1).
  4. 4. A melamine drying cylinder as set forth in any one of claims 1 to 3, wherein the steam diversion device (9) comprises a cylindrical steam feeding cavity (28) coaxially arranged in the middle with the cylinder body (4), a steam transition cavity (34) arranged on the outer side of the feeding end of the heating pipe assembly (6), a plurality of first communication pipelines (25) uniformly arranged between the steam feeding cavity (28) and the steam transition cavity (34) in a surrounding mode, a rotary joint is connected to an air inlet on one side of the steam feeding cavity (28), and high-pressure steam uniformly enters the steam transition cavity (34) through the first communication pipelines (25) and is diverted into the heating pipe assembly (6) for heating after entering the steam feeding cavity (28).
  5. 5. A melamine drying drum as set forth in claim 4, wherein the heating pipe assembly (6) comprises a plurality of steam pipes (31) distributed in a circular ring shape in the drum body (4), the steam pipes (31) comprise steam inlet pipes (33) with one ends communicated with the steam transition cavities (34), and condensation return pipes (32) sleeved on the outer sides of the steam pipes (31), the steam inlet pipes (33) are connected with the condensation return pipes (32) through brackets, the tail ends of the condensation return pipes (32) are of a blocking structure, high-temperature steam flows into the steam inlet pipes (33) through the steam transition cavities (34), and then flows into the condensation return pipes (32) through the steam inlet pipes (33) to heat and dry melamine.
  6. 6. A melamine drying drum as claimed in claim 5, characterized in that a cavity dividing plate (29) is arranged in each of the steam feed cavity (28) and the steam transition cavity (34), a first concentrate converging chamber (30) is formed between the interior of the steam transition cavity (34) and the side wall of the drum body (4) through the cavity dividing plate (29), a second concentrate converging chamber (26) is formed between the interior of the steam feed cavity (28) and the side wall of the drum body (4) through the cavity dividing plate (29), a plurality of second connecting pipelines (24) are arranged between the first concentrate converging chamber (30) and the second concentrate converging chamber (26), an outwardly extending water outlet pipe (27) is arranged in the middle of the second connecting pipelines (24), one end of the condensate return pipe (32) is communicated with the first concentrate converging chamber (30), condensed liquid after high-pressure steam is cooled is returned into the first concentrate converging chamber (30) through the condensate return pipe (32) again, and flows into the second concentrate converging chamber (26) through the second connecting pipelines (24), and flows out of the second concentrate converging chamber (26) through the second connecting pipelines (24).

Description

Melamine drying roller Technical Field The invention relates to the technical field of chemical equipment, in particular to a melamine drying roller. Background Melamine is an important organic chemical intermediate product, and its main industrial use is to produce melamine formaldehyde resins by polycondensation with formaldehyde. Urea is generally adopted as a raw material in the domestic melamine synthesis production, and the water content of the melamine after centrifugal separation is generally about 10-15%, so that wet melamine needs to be dried. At present, small-sized drying equipment is generally used for drying melamine, and when the equivalent is relatively large, stirring type efficient drying cannot be generally realized, so that the drying efficiency is low. When a large quantity of melamine is dried, because the conventional drying equipment generally adopts drum-type or stirring-type drying, a large-sized drying barrel or conveying belt with a large length is used, and the heat source of the conventional large-sized drying barrel generally mainly adopts hot air heating or steam heating, and the inner cavity of the drying barrel is heated by the hot air or steam, and meanwhile, the melamine is better contacted with the heat source by the drum-type drying barrel, so that the melamine is dried. When the hot air is used as a heat source, the hot air is generally conveyed into the drying barrel through a fan, then the air is heated and dried through the rolling drying barrel, the barrel wall is generally assisted by matching with structures such as stirring blades and the like, and when the drying is carried out through steam as a heat source, the barrel wall is generally heated through high-temperature steam, so that the drying barrel is heated and dried through contact with melamine in the rolling process. Whether the hot air is adopted for drying or the steam is adopted for heating and drying the barrel wall, or the combination of the hot air and the steam is adopted for drying, the problem that the melamine in the stirring barrel is intelligently and locally heated and dried exists. For example, adopting and airing the structure, except exposing outside can effectually dry at the melamine on top layer, other regions can't carry out effectual stoving, adopt the staving heating to be the same reason, the stoving scope is around the section of thick bamboo wall, leads to heat distribution inhomogeneous, can't carry out the simultaneous heating of different degree of depth to the melamine of piling up in the bucket, has the middle region and can't receive the heating and lead to the inhomogeneous problem of local stoving, and drying efficiency is low, and required stoving time is overlength, and the degree of consistency is poor. Therefore, when drying, the melamine can be effectively and completely dried only by reducing the stacking thickness of the melamine or increasing the stirring frequency and the drying time. Meanwhile, as the inside of the roller is sealed, the internal temperature is not easy to control in the long-time drying process, and the phenomenon of overhigh heating temperature is easy to occur, so that melamine is reacted, and the existing melamine drying device needs to be improved. Disclosure of Invention In order to solve certain or some technical problems in the prior art, the application aims to provide a melamine drying roller, which can solve the problems that the existing drying roller is heated unevenly and cannot heat the roller in a temperature division interval to cause low drying efficiency when heating and drying products. In order to solve the prior art problems, the application adopts the following technical scheme: The utility model provides a melamine dry cylinder, includes the cylinder body, establishes the feed head of cylinder body one end, establishes the discharge mechanism of cylinder body other end, ring are established a plurality of rings of heating pipe assemblies in the cylinder body, establish cylinder body one end is to each the steam flow divider that the heating pipe assembly supplied air, high-pressure steam passes through the quick even reposition of redundant personnel of steam flow divider to the inlet end of each heating pipe assembly is admitted air, the inner wall of cylinder body is followed the one end slope setting of discharge mechanism, the axis of heating pipe assembly with cylinder body inner wall parallel arrangement, the ring is provided with a plurality of holding rings on the inner wall of cylinder body, the heating pipe assembly is passed through the holding ring supports fixedly, wet melamine that the feed head sent in is through the roll of cylinder body to the discharge mechanism end carries, and the wet melamine of forward transport passes through the holding ring separates into different regions, and the wet melamine of different regions passes through the heating pipe assembly carries out the synchronous heating of diff