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A system and method for utilizing waste heat from fiber industry

A technology of industrial waste heat and fiber, which is applied in the field of energy recovery and utilization, can solve the problems of difficult and efficient utilization of industrial waste heat, not being completely environmentally friendly, and aggravating the greenhouse effect, achieving major energy saving and emission reduction effects, solving difficulties and shortcomings, and reducing heat transfer The effect of temperature difference

Active Publication Date: 2019-05-17
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional vapor compression heat pump technology is mature, but this heat pump system is only suitable for heat pumping from a fixed temperature heat source, and it is difficult to efficiently utilize industrial waste heat with temperature changes, which can be explained by figure 2 It is known from the temperature entropy diagram of the single-stage vapor compression cycle shown; in addition, the heat pump temperature of conventional heat pumps generally does not exceed 100 °C
In addition, the circulating working medium of the heat pump unit is freon, and the working medium is not completely environmentally friendly, which will aggravate the greenhouse effect and cause pollution to the environment

Method used

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  • A system and method for utilizing waste heat from fiber industry
  • A system and method for utilizing waste heat from fiber industry
  • A system and method for utilizing waste heat from fiber industry

Examples

Experimental program
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Embodiment 1

[0050] Figure 4 It is a schematic flow chart of the efficient utilization of waste heat of dyeing industrial wastewater according to the present invention. Such as Figure 4 As shown, the industrial wastewater waste heat utilization system of the present embodiment 1 includes: a gas compression high temperature heat pump system, a booster pump 3 (water pump); wherein, the gas compression high temperature heat pump system consists of a compressor 6, a hot end heat exchanger 7, The expander 4 and the cold end heat exchanger 5 are connected end to end to form a loop; the system of this embodiment also includes an industrial boiler 1 (industrial hot water (hot steam) boiler), and fiber industrial equipment 2 (dyeing cylinder). The waste heat wastewater discharged from the fiber industry is divided into two streams, which enter the countercurrent hot-end heat exchanger and cold-end heat exchanger respectively. The waste water entering the hot-end heat exchanger needs to be booste...

Embodiment 2

[0057] Figure 5 It is the high-efficiency utilization process (embodiment 2) of paper industry waste heat waste heat of the present invention. Such as Figure 5 As shown, the waste heat system utilizing waste water in the fiber industry in this embodiment 2 is composed of a compressor 6, a hot-end heat exchanger 7, an expander 4 and a cold-end heat exchanger 5 connected end-to-end to form a loop; the system of this embodiment also includes Industrial boiler 1 (industrial hot water (hot steam) boiler), fiber industrial equipment 2 (cooking drum). The waste heat discharged from the fiber industry is divided into two streams and enters the counter-flow hot-end heat exchanger and cold-end heat exchanger respectively.

[0058] The industrial waste heat flowing out from the cold-end heat exchanger 5 is recycled to the industrial boiler 1 for heating, and the high-temperature water flowing out from the hot-end heat exchanger 7 enters the industrial boiler 1 for heating to become s...

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Abstract

The invention relates to the field of energy recycling. A system utilizing waste heat of the fiber industry comprises an expander (4), a cold end heat exchanger (5), a compressor (6) and a hot end heat exchanger (7). A gas working medium outlet of the expander (4) is connected with a gas working medium inlet of the cold end heat exchanger (5). A gas working medium outlet of the cold end heat exchanger (5) is connected with a gas working medium inlet of the compressor (6). A gas working medium outlet of the compressor (6) is connected with a gas working medium inlet of the hot end heat exchanger (7). A gas working medium outlet of the hot end heat exchanger (7) is connected with a gas working medium inlet of the expander (4). By means of the system, the waste heat of the fiber industry can be efficiently utilized, waste heat discharged into the environment is reduced, and the system has the beneficial effects that the temperature changing waste heat is efficiently utilized, industrial waste heat emission is reduced, the ultrahigh temperature pump heat is generated, and working media are completely environment-friendly. The difficulty and defects existing in the conventional heat pump technology are overcome, and huge application prospects are achieved.

Description

technical field [0001] The invention relates to the field of energy recovery and utilization, in particular to a system and method for utilizing waste heat in the fiber industry. Background technique [0002] Energy is an important basis for economic development and social progress, and energy conservation and emission reduction are the key issues for better modernization and economic development in my country. Waste heat utilization, as an important part of energy conservation and emission reduction, has great potential for development. Waste heat belongs to secondary energy, which is rich in resources in our country and widely exists in power station boilers and industrial equipment. According to statistics, the waste heat temperature of waste water that can be used in dyeing projects and papermaking projects in the fiber industry can reach 50-80 °C. These large amounts of industrial waste heat not only waste a large amount of potential energy, but also cause heat polluti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B30/02F27D17/00
CPCF25B30/02F27D17/004Y02P10/25
Inventor 罗开琦周远罗二仓张丽敏胡剑英
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI