کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7120565 1461462 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Online monitoring and characterization of dense phase pneumatically conveyed coal particles on a pilot gasifier by electrostatic-capacitance-integrated instrumentation system
ترجمه فارسی عنوان
نظارت آنلاین و مشخص کردن فاز متراکم ذرات ذغال سنگ را در یک گازگرایان خلبان با استفاده از سیستم اندازه گیری الکترواستاتیک-خازنی
کلمات کلیدی
سیستم الکترواستاتیک-ظرفیتی یکپارچه، ویژگی های جریان، نظارت آنلاین، ذرات سوخت ذوب شده گازدار خلبان زغال سنگ،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی کنترل و سیستم های مهندسی
چکیده انگلیسی
The transportation of pulverized coal in gasification system needs to be carefully monitored and regulated with respect to the operation stability, gas quality and energy efficiency. In this paper, an integrated instrumentation system is developed to continuously monitor the pulverized coal flow within a 30 mm horizontal pneumatic pipe on a pilot coal gasifier at low pressure. The instrumentation system calculates the mass flow rate of pulverized coal by measuring the particle mean velocity with two ring-shaped electrostatic sensors and particle concentration with a helical capacitance sensor. The system is calibrated and optimized before the field experiments, especially the optimal structure of the helical capacitance sensor with a homogeneous sensitivity distribution is achieved by static tests to minimize the influence of the uneven particle concentration distribution on the particle concentration measurement accuracy. Experiments are carried out under various operation conditions to characterize the flow of pulverized coal particles using the integrated instrumentation system. The regulating effects of the operation parameters of the pneumatic conveying system (the angle valve opening, the fluidized gas and supplement gas flow rates, the pressure within the feeding tank) on the particle velocity, concentration and mass flow rate are experimentally studied. Results demonstrate that the integrated instrumentation system can effectively monitor the dense phase pneumatically conveyed coal particles flow on the pilot coal gasifier. Both the angle valve and the pressure within the feeding tank are effective to control the mass flow rate via regulating the particle concentration. The supplement gas can regulate the particle velocity and concentration simultaneously.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Measurement - Volume 125, September 2018, Pages 1-10
نویسندگان
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