Rapid-drying paper drying equipment
By combining rapid dehydration, preheating, and fine drying devices, and utilizing waste heat from exhaust gases to preheat wet paperboard and control the drying process, the problems of energy waste and paperboard damage in paper drying equipment are solved, achieving efficient and energy-saving paperboard drying results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-25
- Publication Date
- 2026-04-03
AI Technical Summary
Existing paper drying equipment suffers from energy waste and paperboard warping or surface cracking during rapid drying, and fails to fully utilize the residual heat in the exhaust gas.
A combination of a rapid dehydration device, a preheating device, and a fine drying device is used to preheat the wet paperboard using waste heat from the exhaust gas, and the drying process of the wet paperboard is controlled through multi-stage heating to avoid damage to the paperboard caused by excessively rapid drying.
It achieves the goal of maintaining the quality of cardboard at a high-efficiency drying rate, avoiding warping or cracking, while making full use of waste heat from exhaust gas to reduce energy waste.
Smart Images
Figure CN224080646U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dryer technology, and in particular to a paper drying device for rapid drying. Background Technology
[0002] Paper dryers are key pieces of equipment in papermaking, primarily used to remove moisture from wet paperboard to achieve the required dryness and strength. Paper dryers with rapid drying functions can efficiently dehydrate and shorten production time. Building upon traditional drying methods, they accelerate moisture evaporation by increasing temperature, enhancing hot air convection, and optimizing the drying structure.
[0003] However, most equipment does not fully recover the residual heat from the exhaust gas, resulting in energy waste. In addition, excessively fast drying rates can cause the cardboard surface to harden, preventing sufficient evaporation of internal moisture, or can lead to warping or surface cracking of the cardboard.
[0004] Therefore, this application provides a rapid paper drying apparatus to solve the problems mentioned in the background art. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a rapid paper drying device that can fully evaporate moisture at maximum drying rate. Furthermore, it can make full use of the waste heat in the exhaust gas.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] A rapid paper drying device includes a rapid dehydration device, a preheating device, a fine drying device, and a conveying device. The rapid dehydration device includes a dehydration shell. Two partitions are fixedly installed at both the upper and lower ends of the dehydration shell. A first air outlet pipe is fixedly installed on the opposite side of the two partitions. Two first electric heating tubes are fixedly connected to the inner top and inner bottom surfaces of the dehydration shell. A first blower is fixedly connected to the other end of the two first air outlet pipes. Two waste heat extraction ports are opened on the front and rear inner walls of the dehydration shell. A waste heat outlet is opened on the other side of the outer wall of the dehydration shell.
[0008] The preheating device includes a preheating shell, and a second air outlet pipe is provided on the upper surface of the preheating shell;
[0009] The fine drying device includes a fine drying shell, and two second electric heating tubes are fixedly connected to the inner top and inner bottom surfaces of the fine drying shell.
[0010] A fine drying device is fixedly connected to one side of the outer wall of the rapid dehydration device, and a preheating device is fixedly connected to the other side of the outer wall.
[0011] Furthermore, air inlets are provided on both the upper and lower end faces of the dehydration shell near the outer wall.
[0012] Furthermore, each of the four waste heat extraction ports is fixedly equipped with a second blower, and waste heat pipes are opened on both sides of the outer wall of the dehydration shell, through which multiple waste heat extraction ports are connected to waste heat outlets.
[0013] Furthermore, one end of the outer wall of the second air outlet is fixedly connected to the waste heat outlet.
[0014] Furthermore, the conveying device includes a mesh belt conveyor, and conveying holes are provided in the middle of both sides of the outer walls of the dehydration shell, the preheating shell, and the fine drying shell.
[0015] Furthermore, the other side of the outer wall of the dehydration shell is fixedly connected to one side of the outer wall of the preheating shell, and the two conveying holes at the connection are on the same horizontal line; the other side of the outer wall of the dehydration shell is fixedly connected to the other side of the outer wall of the fine drying shell, and the two conveying holes at the connection are on the same horizontal line.
[0016] Furthermore, the mesh belt conveyor passes through the fine drying shell, the dehydration shell, and the preheating shell sequentially from left to right through multiple conveying holes.
[0017] This utility model has the following beneficial effects:
[0018] 1. This utility model proposes a rapid paper drying device that maintains quality while ensuring drying speed. The paperboard is preheated by a preheating device, and then the wet paperboard is sent to a rapid dehydration device to remove most of the moisture. It is then sent to a fine drying device, where the paperboard is baked evenly and thoroughly, ensuring that both the inside and outside of the paperboard are dry. Multiple baking cycles at different temperatures prevent warping or surface cracking of the paperboard caused by excessively rapid drying.
[0019] 2. This utility model proposes a rapid paper drying equipment. After processing the wet paperboard, the residual heat from the rapid dehydration device has utilization value; direct discharge would result in energy waste. The second blower sequentially sends the heat-containing waste gas through the waste heat pipe and waste heat outlet to the second outlet, using the heat-containing waste gas to preheat the newly placed wet paperboard. Attached Figure Description
[0020] Figure 1 This is an overall isometric schematic diagram of the present invention;
[0021] Figure 2 This is a schematic diagram of the overall back of the present invention;
[0022] Figure 3 This is an isometric schematic diagram of the baking device of this utility model;
[0023] Figure 4 This is a cross-sectional schematic diagram of the rapid dehydration device of this utility model;
[0024] Figure 5 This is an isometric schematic diagram of the rapid dehydration device of this utility model;
[0025] Figure 6 This is an isometric schematic diagram of the preheating device of this utility model;
[0026] Figure 7 This is a cross-sectional schematic diagram of the fine drying device of this utility model.
[0027] Legend:
[0028] 1. Rapid dehydration device; 2. Preheating device; 3. Fine drying device; 4. Conveying device; 101. Dehydration shell; 102. Partition plate; 103. First electric heating tube; 104. First blower; 105. Waste heat exhaust port; 106. Waste heat exhaust port; 107. Air inlet; 108. Second blower; 109. First air outlet pipe; 110. Waste heat pipe; 201. Preheating shell; 202. Second air outlet pipe; 301. Fine drying shell; 302. Second electric heating tube; 401. Mesh belt conveyor; 402. Conveying hole. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] Reference Figure 1 , Figure 3 , Figure 4 , Figure 5This utility model provides an embodiment of a rapid paper drying device, comprising a rapid dehydration device 1, a preheating device 2, a fine drying device 3, and a conveying device 4. The rapid dehydration device 1 includes a dehydration shell 101. Two partitions 102 are fixedly installed at both the upper and lower ends inside the dehydration shell 101. First air outlet pipes 109 are fixedly installed on the opposite sides of the two partitions 102. Two first electric heating tubes 103 are fixedly connected to the inner top and bottom surfaces of the dehydration shell 101. A first blower 104 is fixedly connected to the other end of each of the two first air outlet pipes 109. Two waste heat extraction ports 105 are opened on the front and rear inner walls of the dehydration shell 101, and a waste heat outlet 106 is opened on the other side of the outer wall of the dehydration shell 101. The fine drying device 3 is fixedly connected to one side of the outer wall of the rapid dehydration device 1, and the preheating device 2 is fixedly connected to the other side of the outer wall. Air inlets 107 are opened on the outer wall sides of both the upper and lower ends of the dehydration shell 101. Each of the four waste heat extraction ports 105 is equipped with a second blower 108. Waste heat pipes 110 are opened on both sides of the outer wall of the dehydration shell 101, and the multiple waste heat extraction ports 105 are connected to the waste heat outlet 106 through the waste heat pipes 110.
[0031] Specifically, multiple first electric heating tubes 103 at the upper and lower ends of the rapid dehydration device 1 generate a large amount of heat, and two first blowers 104 blow hot air toward the middle of the rapid dehydration device 1. The high-temperature hot air impact can quickly remove the moisture from the wet cardboard.
[0032] Reference Figure 1 , Figure 3 , Figure 6 The preheating device 2 includes a preheating shell 201, and a second air outlet 202 is provided on the upper surface of the preheating shell 201. One end of the outer wall of the second air outlet 202 is fixedly connected to the waste heat outlet 106.
[0033] Specifically, the second blower 108 sends the waste gas containing residual heat inside the rapid dehydration device 1 to the second air outlet 202 through the waste heat pipe 110, and heats the wet cardboard entering the preheating device 2 with the waste gas containing residual heat.
[0034] Reference Figure 1 , Figure 3 , Figure 7 The fine drying device 3 includes a fine drying shell 301, and two second electric heating tubes 302 are fixedly connected to the inner top surface and the inner bottom surface of the fine drying shell 301.
[0035] Specifically, the wet cardboard in the rapid dehydration device 1, which is in a semi-dry state with less moisture, can be directly and slowly baked by multiple second electric heating tubes 302 inside the fine drying device 3, which can make the baking more even and thorough.
[0036] Reference Figure 1 , Figure 2The conveying device 4 includes a mesh belt conveyor 401. Conveying holes 402 are provided on the middle of both sides of the outer walls of the dehydration shell 101, preheating shell 201, and finishing shell 301. The other side of the outer wall of the dehydration shell 101 is fixedly connected to one side of the outer wall of the preheating shell 201, and the two conveying holes 402 at the connection point are on the same horizontal line. Similarly, one side of the outer wall of the dehydration shell 101 is fixedly connected to the other side of the outer wall of the finishing shell 301, and the two conveying holes 402 at the connection point are on the same horizontal line. The mesh belt conveyor 401 passes through the finishing shell 301, dehydration shell 101, and preheating shell 201 sequentially from left to right through the multiple conveying holes 402.
[0037] Specifically, due to the characteristics of the conveyor belt of the mesh belt conveyor 401, wet cardboard can be baked on both the top and bottom surfaces simultaneously. The mesh belt conveyor 401 passes through multiple conveying holes 402 and operates inside the rapid dewatering device 1, the preheating device 2, and the fine drying device 3, carrying the wet cardboard into each device for processing.
[0038] Working Principle: When freshly processed cardboard or cardboard damaged by rain and dampness needs drying, the equipment is started by powering on. The mesh belt conveyor 401 is a mature and publicly available technology, therefore its specific structure and working principle will not be described in detail here. The wet cardboard to be processed is placed on the upper end of the mesh belt conveyor 401, which carries the wet cardboard into the preheating device 2. The waste gas with residual heat preheats the wet cardboard, reducing energy waste. Subsequently, the wet cardboard is conveyed to the rapid dehydration device 1 by the mesh belt conveyor 401. Through the cooperation of multiple first electric heating tubes 103 and two first blowers 104, high-temperature hot air impacts the wet cardboard, which can quickly remove most of the moisture. Then, it is conveyed to the fine drying device 3 by the mesh belt conveyor 401, where multiple second electric heating tubes 302 slowly bake the wet cardboard, making the baking more uniform and thorough, avoiding the situation of dry outside and damp inside. In addition, the step-by-step baking can prevent the cardboard from warping or cracking due to high temperature.
[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A rapid paper drying device, comprising a rapid dewatering device (1), a preheating device (2), a fine drying device (3), and a conveying device (4), characterized in that: The rapid dehydration device (1) includes a dehydration shell (101). Two partitions (102) are fixedly installed at both the upper and lower ends inside the dehydration shell (101). A first air outlet pipe (109) is fixedly installed on the opposite side of the two partitions (102). Two first electric heating tubes (103) are fixedly connected to the inner top and inner bottom surfaces inside the dehydration shell (101). A first blower (104) is fixedly connected to the other end of the two first air outlet pipes (109). Two waste heat extraction ports (105) are opened on the front and rear inner walls of the dehydration shell (101). A waste heat outlet port (106) is opened on the other side of the outer wall of the dehydration shell (101). The preheating device (2) includes a preheating shell (201), and a second air outlet pipe (202) is provided on the upper surface of the preheating shell (201); The fine drying device (3) includes a fine drying shell (301), and two second electric heating tubes (302) are fixedly connected to the inner top surface and the inner bottom surface of the fine drying shell (301); The rapid dehydration device (1) has a fine drying device (3) fixedly connected to one side of its outer wall and a preheating device (2) fixedly connected to the other side of its outer wall.
2. The paper drying equipment for rapid drying according to claim 1, characterized in that: The dehydration shell (101) has air inlets (107) on both the upper and lower end faces near the outer wall.
3. The paper drying equipment for rapid drying according to claim 1, characterized in that: Each of the four waste heat extraction ports (105) is equipped with a second blower (108). Waste heat pipes (110) are opened on both sides of the outer wall of the dehydration shell (101). The multiple waste heat extraction ports (105) are connected to the waste heat outlet (106) through the waste heat pipes (110).
4. The paper drying equipment for rapid drying according to claim 1, characterized in that: One end of the outer wall of the second air outlet pipe (202) is fixedly connected to the waste heat outlet (106).
5. The paper drying equipment for rapid drying according to claim 1, characterized in that: The conveying device (4) includes a mesh belt conveyor (401), and conveying holes (402) are provided on the middle of both sides of the outer walls of the dehydration shell (101), the preheating shell (201) and the fine drying shell (301).
6. The paper drying equipment for rapid drying according to claim 1, characterized in that: The other side of the outer wall of the dehydration shell (101) is fixedly connected to one side of the outer wall of the preheating shell (201), and the two conveying holes (402) at the connection are on the same horizontal line. The other side of the outer wall of the dehydration shell (101) is fixedly connected to the other side of the outer wall of the fine drying shell (301), and the two conveying holes (402) at the connection are on the same horizontal line.
7. The paper drying equipment for rapid drying according to claim 5, characterized in that: The mesh belt conveyor (401) passes through the fine drying shell (301), the dehydration shell (101) and the preheating shell (201) from left to right through multiple conveying holes (402).