Research on optimum detection angle and switching point of non-radioactive nuclear ash bucket level meter

XIE Xicheng; ZHANG Yuanyuan; GUO Yajuan; LAI Wanchang

doi:10.11889/j.0253-3219.2019.hjs.42.100401

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Research on optimum detection angle and switching point of non-radioactive nuclear ash bucket level meter

NUCLEAR ELECTRONICS AND INSTRUMENTATION | 更新时间：2024-10-25

- Research on optimum detection angle and switching point of non-radioactive nuclear ash bucket level meter
- NUCLEAR TECHNIQUES Vol. 42, Issue 10, (2019)
- 作者机构：
  
  1.河北北方学院张家口 075000
  2.北京大学昌平校区管理办公室北京 102249
  3.成都理工大学成都 610000
- 作者简介：
  
  XIE Xicheng, female, born in 1988, graduated from Chengdu University of Technology with a doctoral degree in 2015, focusing on nuclear technology and applications
  LAI Wanchang, E-mail: 783837376@qq.com
- 基金信息：
  
  Dr. XIE Xicheng Fund of Hebei North University
- DOI：10.11889/j.0253-3219.2019.hjs.42.100401
  CLC： TL812⁺.1
- Received：27 May 2019，
  
  Revised：20 July 2019，
  
  Published：13 October 2019
- 稿件说明：
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谢希成,张原源,郭亚娟等.无源核子灰斗料位计最佳探测角及开关点研究[J].核技术,2019,42(10):33-38.

XIE Xicheng,ZHANG Yuanyuan,GUO Yajuan,et al.Research on optimum detection angle and switching point of non-radioactive nuclear ash bucket level meter[J].NUCLEAR TECHNIQUES,2019,42(10):33-38.
谢希成,张原源,郭亚娟等.无源核子灰斗料位计最佳探测角及开关点研究[J].核技术,2019,42(10):33-38. DOI： 10.11889/j.0253-3219.2019.hjs.42.100401.

XIE Xicheng,ZHANG Yuanyuan,GUO Yajuan,et al.Research on optimum detection angle and switching point of non-radioactive nuclear ash bucket level meter[J].NUCLEAR TECHNIQUES,2019,42(10):33-38. DOI： 10.11889/j.0253-3219.2019.hjs.42.100401.

摘要

本文对基于电除尘器灰斗上的无源核子料位计进行了蒙特卡罗模拟，从0°~90°不断改变无源核子料位计的探测角度，当探测角度为30°时，达到探测界面最大能量流量。确立了当灰斗壁与水平面的夹角是61.224°时，料位计的最佳探测角度为30°。在蒙特卡罗方法和无源核子料位计的研究基础上，建立了完整的电除尘器灰斗和无源核子料位计模型，得到了料位计在30°探测角下不同粉煤灰高度时的吸收剂量率曲线。用二阶导数法研究了灰斗中粉煤灰的增加和减少趋势以及开关点。为仪器的研制和灵敏度的提高提供了理论指导。

Abstract

Background

Material level detection is a very important issue for the automatic control of thermal power. How to monitor the material and powder level has become an urgent problem for the thermal power plant.

Purpose

This study aims to find out the best detection angle and switching point to provide theoretical guidance for instrument development and sensitivity improvement.

Methods

First of all

Monte Carlo simulation was applied to the optimum design of the best detection angle for non-radioactive nuclear ash hopper level meter in the range of 0°~90°. Then the angle between the ash bucket wall and the horizontal plane for the optimum detection angle was determinated. Finally

a complete model of dust hopper and passive nuclear level gauge for electrostatic precipitator (ESP) was established

and the high and low switch points material level were by "second derivative method".

Results

When the angle between the probe and the horizontal line reaches 30°

the maximum energy flux is detected while the angle between the ash bucket wall and the horizontal plane is 61.224°. The absorption dose rate curve of material level meter with different fly ash height at 30° detection angle is obtained.

Conclusions

This study provides theoretical guidance for the development of non-radioactive nuclear ash hopper level meter instrument and improvement of sensitivity in thermal power plants.

关键词

Keywords

references

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