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Steam condensed water system

A technology of steam condensing water and steam, which is applied in the field of papermaking, which can solve the problems of high steam consumption per ton of paper and low drying efficiency, and achieve the effects of improving heat energy use efficiency, improving drying efficiency, and improving drying efficiency

Pending Publication Date: 2020-06-19
上海东冠纸业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Paper machines that mainly produce paper towels and high-weight toilet paper have been troubled by the following problems due to design problems: ①The drying efficiency is not high; ②The steam consumption per ton of paper is high, which is greater than the target steam consumption of 2.85 tons of steam / ton of paper, about 3.0~3.10 tons steam / ton paper

Method used

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  • Steam condensed water system

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Embodiment

[0024] A steam condensate system, its structure is as figure 1 As shown, including the flash tank and heat exchange components, there are two sets of flash tanks, the first group of flash tanks 1 is connected to the drying cylinder 9 and the high-pressure steam pipeline 3, and the dry steam introduced is 12bar high-pressure steam, and the operating pressure range is Between 1bar and 5bar. The second group of flash tanks 2 is connected with the heat exchange components, and the heat exchange components used include air-gas converter 4, dry-end condensate heat exchanger 5, dry-end flash steam heat exchanger 6, dry-end steam heat exchanger 7, the wet end steam heat exchanger 8, the gas-gas converter 4 communicates with the dry end condensate heat exchanger 5, the dry end condensate heat exchanger 5 communicates with the second flash tank 2, and the dry end flash steam heat The exchanger 6 , the dry-end steam heat exchanger 7 , and the wet-end steam heat exchanger 8 are connected...

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Abstract

The invention relates to a steam condensed water system, which comprises flash evaporation tanks and a heat exchange assembly, wherein two groups of the flash evaporation tanks are arranged, the firstgroup of the flash evaporation tanks is connected with a high-pressure steam pipeline, the second group of the flash evaporation tanks is connected with the heat exchange assembly, the heat exchangeassembly comprises a gas-gas converter, a condensed water heat exchanger and a steam heat exchanger, the gas-gas converter is communicated with the condensed water heat exchanger, the condensed waterheat exchanger is communicated with the second group of the flash evaporation tanks, and the steam heat exchanger is communicated with the second group of the flash evaporation tanks and the high-pressure steam pipeline. Compared with the prior art, the steam condensed water system of the invention can reduce the steam consumption of the heat exchanger, stabilize the temperature requirement of thegas hood and improve the heat energy use efficiency of condensed water.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a steam condensate water system. Background technique [0002] The existing paper machine hot air drying system is divided into heat exchanger air hood drying and drying cylinder direct steam inlet drying, and the air hood is divided into dry side air hood and wet side air hood. It is necessary to adjust the temperature of the dry-side and wet-side gas hoods to about 130°C, and the inlet steam pressure of the dryer is usually 0.32-0.4MPa; [0003] The main working principle of gas hood drying is to use the hot air generated in the gas hood to dry the whole wet paper web entering the drying cylinder, that is, heat convection. Part of the exhaust gas withdrawn from the gas hood can be added with some fresh air, and then passed through the exchange again. The heater is heated and recycled; the steam inlet drying of the dryer is mainly to use the high temperature on the surface of the dry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F5/20D21F5/10
CPCD21F5/20D21F5/10
Inventor 水玉峰胡燕冬莫建新
Owner 上海东冠纸业有限公司
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