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CN-121976413-A - Efficient energy-saving oil-heated dryer drying equipment

CN121976413ACN 121976413 ACN121976413 ACN 121976413ACN-121976413-A

Abstract

The invention discloses efficient energy-saving oil-heated dryer drying equipment, and belongs to the technical field of drying equipment. The device comprises a drying cylinder, wherein the drying cylinder comprises a cylinder body, an oil distribution system for spraying heat conduction oil to the inner wall of the drying cylinder is arranged in the cylinder body, two ends of the oil distribution system are communicated with an oil conduction circulation system, the oil conduction circulation system comprises an oil conduction circulation pipeline, a circulation pump group and a heat exchange mechanism, the heat exchange mechanism comprises a steam heat exchange component for heating the heat conduction oil and an air heat exchanger for utilizing the waste heat of the heat conduction oil, the heat conduction oil heated by the drying cylinder flows through a hot air pipe firstly, the waste heat is utilized to heat air entering a gas hood, the air is then fed into the air heat exchanger to heat the air to form hot air, the auxiliary heating is carried out on paper, and finally the paper is returned to the heating system, so that the heat of the heat conduction oil is utilized in three stages, compared with the conventional oil value heating means, the energy loss is greatly reduced, and the long-term operation energy consumption advantage is more remarkable.

Inventors

  • HUANG WEI
  • CAI YULING
  • CHEN GUODONG

Assignees

  • 南京万企环保节能科技有限公司

Dates

Publication Date
20260505
Application Date
20260121

Claims (10)

  1. 1. The efficient energy-saving oil-heated drying cylinder drying equipment is characterized by comprising a drying cylinder (1), wherein the drying cylinder (1) comprises a cylinder body (101), an oil distribution system for spraying heat conduction oil to the inner wall of the drying cylinder (1) is arranged in the cylinder body (101), two ends of the oil distribution system are communicated with an oil conduction circulation system, the oil conduction circulation system comprises an oil conduction circulation pipeline, a circulation pump group (2) and a heat exchange mechanism, and the heat exchange mechanism comprises a steam heat exchange component (4) for heating the heat conduction oil and an air heat exchanger (5) for utilizing waste heat of the heat conduction oil; The oil distribution system comprises a central sleeve (102), an oil injection assembly is fixedly connected to the top of the central sleeve (102), an oil return assembly is fixedly connected to the bottom of the central sleeve (102), and two ends of the central sleeve (102) are communicated with an oil guide circulation pipeline.
  2. 2. The efficient energy-saving oil-heating dryer drying equipment according to claim 1, wherein the oil injection assembly comprises an oil injection frame (103), a plurality of atomizing nozzles (104) are fixedly arranged at the top of the oil injection frame (103), the bottom of the oil injection frame (103) is fixedly connected with a central sleeve (102) through a plurality of oil injection pipes (105), the oil return assembly comprises a plurality of oil return pipes (106), the bottoms of the plurality of oil return pipes (106) are fixedly connected with backflow suckers (107), and the bottoms of the backflow suckers (107) are arc-shaped surfaces and are close to the bottom surface of the inner wall of a dryer (1).
  3. 3. An efficient and energy-saving oil-heated dryer drying apparatus as claimed in claim 2, characterized in that the inner wall of the cylinder (101) is fixedly provided with a plurality of groups of heat conducting fins (116), a gap part is arranged between any two adjacent groups of heat conducting fins (116), and the positions of the plurality of gap parts are aligned with the positions of a plurality of reflux sucking discs (107) respectively.
  4. 4. An efficient and energy-saving oil hot dryer drying device as claimed in claim 1, characterized in that a gas hood (3) is arranged above the dryer (1), a hot air pipe (7) is arranged above the gas hood (3), the bottom of the hot air pipe (7) is fixedly connected with the top of the gas hood (3) through a plurality of flues (9), and the oil guiding circulation pipeline passes through the inside of the hot air pipe (7) and is communicated with the air heat exchanger (5).
  5. 5. An efficient and energy-saving oil-heated dryer drying apparatus as claimed in claim 4, characterized in that the flue is provided in the gas hood (3), the flue comprises a flue pipe (301), a heat conducting frame (302) is fixedly connected in the flue pipe (301), flue fins (303) are fixedly connected to both sides of the heat conducting frame (302), and the middle part of the heat conducting frame (302) penetrates out of the outer wall of the flue pipe (301).
  6. 6. An efficient and energy-saving oil-heated dryer drying apparatus as claimed in claim 4, characterized in that an axial fan (8) is fixedly mounted at the top of the air heat exchanger (5), an air supply pipe (10) is fixedly connected to one side of the air heat exchanger (5), one end of the air supply pipe (10) is fixedly connected with a plurality of air supply discs (11), end openings are formed in the ends of the air cover, and one side of the air supply discs is arranged corresponding to the end openings.
  7. 7. An efficient and energy-saving oil-heated dryer drying apparatus as claimed in claim 1, characterized in that the steam heat exchanging assembly (4) comprises a container, a plate heat exchanger is arranged in the container, the steam after heat exchanging is communicated to a water tank heat exchanger through a drain valve, and the heat conducting oil is secondarily heated through the water tank heat exchanger.
  8. 8. An efficient energy-saving oil thermal dryer drying device as claimed in claim 1, characterized in that the circulating pump group (2) comprises a vacuum negative pressure tank (201), one side of the vacuum negative pressure tank (201) is fixedly connected with a water ring vacuum pump (204) through a pipeline, the bottom of the other side of the vacuum negative pressure tank (201) is fixedly connected with a guide pipe (203), one end of the guide pipe (203) is communicated with two parallel oil guide pump groups (206), the output ends of the two oil guide pump groups (206) are fixedly connected with a discharge pipe (209) together, the middle part of the discharge pipe (209) is fixedly provided with a double-cylinder duplex switching filter (208), and one end of the discharge pipe (209) is communicated with an oil guide circulating pipeline.
  9. 9. An efficient and energy-saving oil-heated dryer drying apparatus as claimed in claim 1, characterized in that both ends of the inner wall of the cylinder (101) are provided with mounting seats (109), one ends of both mounting seats (109) are fixedly provided with bearing seats (108), both inner walls of both bearing seats (108) are fixedly provided with support bearings, and both inner walls of both support bearings are respectively in rotational connection with both ends of the central sleeve (102).
  10. 10. An efficient and energy-saving oil hot dryer drying apparatus as claimed in claim 1, characterized in that both ends of the cylinder body (101) are fixedly connected with end cover plates (117), the middle parts of both end cover plates (117) are inclined towards the inner side of the dryer (1), and one side of the end cover plates (117) close to the inner side of the dryer (1) is fixedly connected with the mounting seat (109).

Description

Efficient energy-saving oil-heated dryer drying equipment Technical Field The invention relates to the field of drying equipment, in particular to efficient and energy-saving oil-heated dryer drying equipment. Background In the production process of the paper industry, drying by a dryer is a key link for determining the quality and the production efficiency of paper. The traditional drying cylinder is heated generally by directly introducing high-temperature steam into the drying cylinder, latent heat released by steam condensation is utilized to heat the outer wall of the drying cylinder, and then high-moisture-content paper in a laminating operation is dried, but the technology has the obvious defects that steam is easy to form a condensed water film on the inner wall of the drying cylinder when encountering cold, the boiling point limit of water causes that the temperature of the outer wall of the drying cylinder can only reach about 100 ℃ at the highest, heat transfer is seriously hindered, a large amount of steam waste heat is not fully utilized, namely, the waste heat is directly discharged, and meanwhile, the drying efficiency of the paper is low, and the yield is difficult to promote. In order to solve the problems, the prior art has an improved scheme that a steam direct heating dryer is replaced by an oil injection mode, the upper limit of the temperature of the dryer is broken through by the characteristics of low pressure, high temperature and no condensation of heat conduction oil, the heat transfer efficiency is improved to a certain extent, but the heat conduction dryer still has a plurality of defects that a heat energy utilization layer adopts a single heat source to heat the heat conduction oil, the steam is discharged after heat exchange is completed once, the heat conduction oil directly flows back after the heating of the dryer is completed, the waste heat is not deeply excavated, the structural design layer has an inaccurate oil distribution mode, the heat conduction contact area is limited, the local heating of the dryer is uneven easily caused, an efficient recovery mechanism is lacked in an oil return system, and the problem of residual siltation of the heat conduction oil exists. Disclosure of Invention The invention provides efficient energy-saving oil hot dryer drying equipment, which can solve the problem of insufficient utilization of heat conduction oil waste heat in the prior art. The invention provides high-efficiency energy-saving oil-heated drying equipment for drying a drying cylinder, which comprises a drying cylinder, wherein the drying cylinder comprises a cylinder body, an oil distribution system for spraying heat conduction oil to the inner wall of the drying cylinder is arranged in the cylinder body, two ends of the oil distribution system are communicated with an oil guide circulation system, and the oil guide circulation system comprises an oil guide circulation pipeline, a circulation pump group and a heat exchange mechanism; the oil distribution system comprises a central sleeve, the top of the central sleeve is fixedly connected with an oil injection assembly, the bottom of the central sleeve is fixedly connected with an oil return assembly, and two ends of the central sleeve are communicated with an oil guide circulation pipeline. The oil injection assembly comprises an oil injection frame, wherein a plurality of atomizing spray heads are fixedly arranged at the top of the oil injection frame, the bottom of the oil injection frame is fixedly connected with a central sleeve through a plurality of oil injection pipes, the oil return assembly comprises a plurality of oil return pipes, the bottoms of the oil return pipes are fixedly connected with backflow suckers, and the bottoms of the backflow suckers are arc-shaped and are close to the bottom surface of the inner wall of a drying cylinder. As a further scheme of the invention, the inner wall of the cylinder body is fixedly provided with a plurality of groups of heat conducting fins, a gap part is arranged between any two groups of adjacent heat conducting fins, and the positions of the plurality of gap parts are aligned with the positions of the plurality of reflux sucking discs respectively. As a further scheme of the invention, mounting seats are arranged at two ends of the inner wall of the cylinder body, bearing seats are fixedly arranged at one ends of the two mounting seats, supporting bearings are fixedly arranged at the inner walls of the two bearing seats, and the inner walls of the two supporting bearings are respectively and rotatably connected with two ends of the central sleeve. As a further scheme of the invention, the two ends of the cylinder body are fixedly connected with end cover plates, the middle parts of the two end cover plates are obliquely arranged towards the inner side of the drying cylinder, and one side, close to the inner part of the drying cylinder, of the end cover plates is fix