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Method for improving circulation of materials in paper mill boiler furnace

A boiler furnace and material circulation technology, applied in the field of papermaking, can solve problems such as limited adjustment range, poor magnification, and increased power consumption of the return fan

Active Publication Date: 2019-08-09
LIANSHENG PAPER IND LONGHAI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technology, the amount of recycled materials is insufficient, and the amount of returned materials is small, resulting in a poor rate of material circulation
The above problems can be alleviated to a certain extent by increasing the power of the return fan, but the adjustment range is limited
At the same time, the increase in air volume will increase the power consumption and wear of the return fan, which does not meet the needs of environmental protection

Method used

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  • Method for improving circulation of materials in paper mill boiler furnace

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Embodiment Construction

[0024] In order to explain in detail the technical content, structural features, achieved goals and effects of the technical solution, the following will be described in detail in conjunction with specific embodiments and accompanying drawings.

[0025] see figure 1 as well as figure 2 , this embodiment relates to a boiler furnace 10 in a paper mill, the left furnace is a combustion chamber, the right furnace is a cyclone separator, the cyclone separator is connected to the combustion chamber through a feeder, and the feeder fan is arranged below the feeder . The wind cap 20 is fastened and connected in the feeder by screws. The material burns for the first time in the combustion chamber and enters the cyclone separator. The cyclone separator separates the recyclable materials into the return device, and the return device sends the recyclable materials back to the combustion chamber for secondary combustion.

[0026] In particular, it relates to a method for improving the ...

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Abstract

The invention relates to a method for improving the circulation of materials in a paper mill boiler furnace. The method for improving the circulation of the materials in the paper mill boiler furnacecomprises the following steps that the temperature of the boiler furnace and the material conveying speed of feeding are detected, and the temperature of the boiler furnace and the material conveyingspeed of the feeding are kept constant; the returning air volume and the returning air pressure are detected, and the circulating ratio is calculated; if the circulating ratio is less than a preset value, the number of air cap holes of returning air and aeration air or the bore diameters of the air cap holes of the returning air and the aeration air are increased; the returning air volume and thereturning air pressure are detected in real time, and the circulating ratio is calculated again; and the steps are cycled until the circulating ratio is greater than the preset value and the returningair volume and the returning air pressure are within a preset range. Different from the prior art, according to the method for improving the circulation of the materials in the paper mill boiler furnace, by increasing the returning air volume and decreasing the returning air pressure slightly, the circulation ratio between the materials is effectively increased, the heat load rate of a boiler isevidently accelerated, and the thermal efficiency of the boiler is promoted.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a method for improving material circulation in a boiler furnace of a paper mill. Background technique [0002] In the prior art, the boilers used in paper mills are generally single drums, which are generally divided into two shafts at the front and the rear. The front shaft is a general suspension structure, surrounded by membrane water walls. The tail shaft adopts a supporting structure, and the two shafts are connected by a vertical cyclone separator, and the lower part of the separator is connected with a return device and an ash cooler. The cycle rate is about 10-20. [0003] The magnification of material circulation is related to many factors, in addition to temperature, it is also related to material conveying speed. In the prior art, the amount of recycled materials is insufficient, and the amount of returned materials is small, resulting in a poor rate of material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/28
CPCF23C10/28F23C2206/102
Inventor 卢占导蒋忠生郭海龙
Owner LIANSHENG PAPER IND LONGHAI
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