Drying system for paper production, and drying method thereof

A drying system and paper technology, which is applied in the direction of dryers, papermaking, paper machines, etc., can solve the problems of affecting the drying effect of paper, poor paper impact effect, narrow impact force, etc., and improve the drying effect and drying efficiency , improve the impact force, improve the effect of utilization

Active Publication Date: 2020-08-21
VINDA PAPER ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Today's drying device is mainly composed of a drying cylinder and an air hood. During the drying process, high-temperature and high-pressure steam (or hot air) is input into the inside of the drying cylinder and the air hood to dry the wet paper sheets passing through the drying cylinder. The heat of the high-temperature steam inside the dryer evaporates the water on the wet paper leaves, and uses the high-temperature hot air of the air hood to impact the wet paper, taking away the evaporated water while drying the paper, and then, this part of the high-temperature hot air takes away the paper There will still be high waste heat after the moisture is removed, but at present, this part of the hot air is directly discharged outside, resulting in a great waste of energy;
[0004] In addition, the impact effect of the hot air entering the air hood on the paper is poor (for example: narrow impact coverage or insufficient impact force, etc.), which can easily affect the drying effect on the paper

Method used

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  • Drying system for paper production, and drying method thereof
  • Drying system for paper production, and drying method thereof
  • Drying system for paper production, and drying method thereof

Examples

Experimental program
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Embodiment 1

[0041] Such as figure 1 As shown, the present invention discloses a drying system for paper production, which includes a drying cylinder 11 for wet paper sheets 10 to pass through, at least two air hoods arranged on the periphery of the drying cylinder 11, and heating devices corresponding to each air hood And the air supply system 20 communicating between each heating device and each gas hood, in a specific embodiment of the present invention, includes a waste heat recovery system for recovering hot air in each gas hood and returning it to the heating device.

[0042]In a specific embodiment of the present invention, there may be two air hoods, which are divided into a first air hood 121 and a second air hood 122 .

[0043] In a specific embodiment of the present invention, there may be two heating devices, which are respectively a first heating device 131 corresponding to the first gas hood 121 and a second heating device 132 corresponding to the second gas hood 122 .

[00...

Embodiment 2

[0051] Embodiment 2, the difference with embodiment 1 is that

[0052] like Figure 2-Figure 7 As shown, in a specific embodiment of the present invention, the air supply system 20 includes a second air source device 22 that communicates with the output end of the heating device through a third air pipe 21 and has an input end and an output end; A fourth air pipe 23 connected to the output end of the air source device 22, a node 24 formed at the output end of the fourth air pipe 23, and several fifth air pipes 25 connected in series with the node 24 for supplying air to the inside of each air hood.

[0053] In a specific embodiment of the present invention, the second air source device 22 may be an air pump.

[0054] In a specific embodiment of the present invention, it also includes an air guide device 3 which is arranged in each air cover and has an air inlet 30a and an air outlet 30b, and the air inlet 30a communicates with the fifth air pipe 25; wherein, the air guide Th...

Embodiment 3

[0068] Embodiment 3, the difference with embodiment 2 is that

[0069] like Figure 8 As shown, it also includes a control system for controlling the second air source device 22 and the cylinder 460; wherein, the control system includes a first controller 51 for controlling the cylinder 460, a control system for controlling the second air source device 22 The second controller 52 and the central control unit 53 for sending an execution electrical signal to the first controller 51 or the second controller 52; wherein, the communication interface between the first controller 51 and the second controller 52 Configured as a connection mode; in the connection mode, the first controller 51 operates the cylinder 460 based on the electrical signal sent by the central control unit 53, and at the same time the first controller 51 sends an electrical signal to the second controller 52, and the second The controller 52 operates the second gas source device 22 based on the electric signal...

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PUM

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Abstract

The invention relates to a drying system for paper production, and a drying method thereof. The drying system comprises a drying cylinder for wet paper sheets to pass through, at least two gas hoods arranged on the periphery of the drying cylinder, heating devices corresponding to the gas hoods and an air supply system communicated between the heating devices and the gas hoods, and the drying system also comprises a waste heat recovery system used for recovering hot air in the gas hoods and returning the hot air into the heating devices. Waste heat recovery can be conducted on hot air, so theutilization rate of resources is guaranteed; and in addition, the drying effect and the drying efficiency of the wet paper sheets can be further improved through the air supply system.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a drying system for paper production and a drying method thereof. Background technique [0002] In the papermaking industry, a drying device (such as a drying cylinder) is usually provided, which is mainly used to dry the wet paper sheet formed by the forming section, so as to obtain a paper sheet with a low moisture content. [0003] Today's drying device is mainly composed of a drying cylinder and an air hood. During the drying process, high-temperature and high-pressure steam (or hot air) is input into the inside of the drying cylinder and the air hood to dry the wet paper sheets passing through the drying cylinder. The heat of the high-temperature steam inside the dryer evaporates the water on the wet paper leaves, and uses the high-temperature hot air of the air hood to impact the wet paper, taking away the evaporated water while drying the paper, and then, this part of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F5/02D21F5/18D21F5/20
CPCD21F5/02D21F5/18D21F5/20Y02P70/10Y02P80/15
Inventor 郑飞李志林刘亮华洪胜杨致富
Owner VINDA PAPER ZHEJIANG
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