Pyrolysis Characteristics of Waste Salt Organic Impurities in Solar Reactors

DONG Zhenjiao; TAO Yubing; YE Hao; HE Yuan; JIA Haoyang

doi:10.7652/xjtuxb202502012

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Pyrolysis Characteristics of Waste Salt Organic Impurities in Solar Reactors

更新时间：2026-01-06

- Pyrolysis Characteristics of Waste Salt Organic Impurities in Solar Reactors
- Journal of Xi’an Jiaotong University Vol. 59, Issue 2, Pages: 115-126(2025)
- 作者机构：
  
  1.西安交通大学未来技术学院， 710049，西安
  2.西安交通大学热流科学与工程教育部重点实验室， 710049，西安
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202502012
  CLC： TK513
- Received：24 June 2024，
  
  Online First：23 October 2024，
  
  Published：10 February 2025
- 稿件说明：
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DONG Zhenjiao, TAO Yubing, YE Hao, et al. Pyrolysis Characteristics of Waste Salt Organic Impurities in Solar Reactors[J]. Journal of Xi’an Jiaotong University, 2025, 59(2): 115-126.
DOI：

DONG Zhenjiao, TAO Yubing, YE Hao, et al. Pyrolysis Characteristics of Waste Salt Organic Impurities in Solar Reactors[J]. Journal of Xi’an Jiaotong University, 2025, 59(2): 115-126. DOI： 10.7652/xjtuxb202502012.

摘要

为了解决有机杂质阻碍废盐回收利用的问题，基于槽式太阳能聚光器和管式反应炉，建立有机物热解反应器模型，采用光热耦合方法研究了反射镜深度、焦距和反应器外部直径对系统能量分布及有机物热解特性的影响。研究结果表明：随着反射镜深度从100 mm增加到1 000 mm，聚光器平均聚光比增加7.34，但光学效率降低0.52%，反应器最高温度和最低温度均呈上升趋势，温差在100 K左右，热解反应时间缩短，系统热效率提高约10.71%；随着反射镜焦距从100 mm增加到1 000 mm，热流密度更加集中，最大聚光比增大21.03，光学效率降低0.53%，反应器最低温度变化不大，但最高温度和温差呈线性增长，温差从31.45 K增大到222.56 K，系统反应速率和热效率升高；随着反应器外部直径从14 mm增加到104 mm，热流密度降低，平均聚光比从34.75减小到4.71，光学效率提高0.53%，温差从52.13 K升高到114.32 K，反应速率和热效率均降低，单位体积废盐的热解时间从5.26 s· cm

－3

减小到1.29 s· cm

－3

。研究结果对废盐热解反应器的参数设计和优化具有重要意义。

Abstract

To effectively remove organic impurities from waste salt for better waste salt recycling and environmental protection

a pyrolysis reactor model based on a parabolic trough concentrator and a tubular reactor was established in this paper. The effects of reflector depth

focal length

and reactor outer diameter on the energy distribution and the organics pyrolysis characteristics were investigated through photothermal coupling. The results show that as the reflector depth increased from 100 mm

to 1000 mm

the average concentration ratio of the concentrator increased by 7.34 while the optical efficiency decreased by 0.52%; both the maximum temperature

max

and minimum temperature

min

of the reactor increased

with a temperature difference Δ

of the reactor about 100 K; the pyrolysis reaction time was shortened

and the thermal efficiency of the system increased by about 10.71%. As the focal length increased from 100 mm to 1 000 mm

the heat flow density became more concentrated

resulting in a 21.03 increase in the maximum concentration ratio and a 0.53% decrease in optical efficiency; the

min

did not change significantly

but the

max

and Δ

exhibited a linear increase

with the Δ

increasing from 31.45 K to 222.56 K; the system reaction rate and thermal efficiency increased. As the reactor outer diameter increased from 14 mm to 104 mm

the heat flow density decreased

the

ave

decreased from 34.75 to 4.71

and the optical efficiency increased by 0.53%. The

max

and

min

exhibited a decreasing trend

while Δ

increased from 52.13 K to 114.32 K. The reaction rate and thermal efficiency decreased

but the pyrolysis time of per unit volume waste salt decreased from 5.26 s·cm

－3

to 1.29 s·cm

－3

. The study results presented in this paper are significant for the parameter design and optimization of solar waste salt pyrolysis reactor.

关键词

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references

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