Research on Energy-Saving Control Technology of Boiler

2011 ◽  
Vol 383-390 ◽  
pp. 2603-2607
Author(s):  
Yao Yi ◽  
Guang Jian Chen ◽  
Jin Ling Jia
Keyword(s):  
Energy Saving ◽  
Intelligent Control ◽  
Flue Gas ◽  
Combustion Efficiency ◽  
Wind Pressure ◽  
Boiler Furnace ◽  
Door Opening ◽  
Boiler Efficiency ◽  
Secondary Air ◽  
Energy Saving Control

Focusing on energy-saving issues of boiler, this paper finds out the combustion conditions inside boiler furnace by monitoring and analysis on oxygen content of flue gas, carbon content of fly ash, CO and CO2 contents. The intelligent control of boiler combustion was achieved and combustion efficiency was rosen. Using neural network controlling model, automatic optimization of oxygen delivery volume,coal delivery volume, the total wind pressure of primary air, the secondary air-door opening degree and furnace negative pressure were achieved, and the boiler efficiency increasing by 5 ~ 7%.

scholarly journals Quality Function Deployment (QFD) and TRIZ in Briquette Cookstove Design and Simulation

2021 ◽  
Vol 12 (2) ◽  
pp. 349-359
Author(s):  
Niswatun Faria ◽  
◽  
Kuntum Khoiro Ummatin ◽  
Mochammad Annas Junianto ◽  
Tedy Eko Budiharso
Keyword(s):  
Flue Gas ◽  
Quality Function Deployment ◽  
Computational Simulation ◽  
Combustion Process ◽  
Combustion Efficiency ◽  
Concept Design ◽  
Complete Combustion ◽  
Air Inlet ◽  
Secondary Air ◽  
Chamber Capacity

Poor cookstove design can harm the user's health and environment. This research aims to obtain an efficient cookstove design, environmentally friendly and operated easily. The cookstove design process using a combination of QFD and TRIZ. QFD able to capture customer needs through a questionnaire and interview. The data collected then processed to build a House of Quality (HoQ), one of the tools in QFD. QFD results in the design parameter of the briquette cookstove, which is incorporated in the concept design. The TRIZ method is utilized to understand the problem that might occur in the concept design and focus on solving the root causes. The next step is a detailed design where the dimensions, combustion chamber capacity, and supporting features are explained. The combination of QFD and TRIZ result in a briquette cookstove concept design which is easy to clean and operate. The combustion system is Top-lit Up-Draft (TLUD). The burning chamber has two air inlets, namely primary and secondary. The primary air inlet supplies the air from the bottom of the burning chamber, partially burns the briquette, and produces flue gas. The secondary air inlet is in the shape of an oval to supply air in the burning chamber's upper part to burn the flue gas completely. A complete combustion process will increase combustion efficiency and reduce emissions. A computational simulation shows the velocity distribution inside the burning chamber.

A SoC Controller for Energy Saving and Environmental Protection

2014 ◽  
Vol 908 ◽  
pp. 477-480
Author(s):  
Li Min Liu
Keyword(s):  
Energy Saving ◽  
Environmental Protection ◽  
Intelligent Control ◽  
Intelligent Systems ◽  
Environment Pollution ◽  
Industrial Automation ◽  
Industrial Emission ◽  
Software And Hardware ◽  
Intelligent Technology ◽  
Energy Saving Control

The energy saving is helpful to decrease industrial emission and environment pollution. An energy saving control based on intelligent technology is a new direction of automation. An intelligent control is composed of algorithm, software and hardware. SoC is one of the most advanced hardware. SoC may get some new progress for energy saving control. In this paper, energy saving, intelligent systems and some SoC controller are discussed. The SoC controller may be more efficient for industrial automation and energy saving.

For Retrofit Applications of Biomass Briquette Industrial Boilers

2014 ◽  
Vol 716-717 ◽  
pp. 813-816
Author(s):  
Chao Cheng ◽  
Guo Min Fu ◽  
Wei Lv ◽  
Xi Yu Lin
Keyword(s):  
Combustion Efficiency ◽  
Front Wall ◽  
Boiler Furnace ◽  
Biomass Boiler ◽  
Air Supply ◽  
Before And After ◽  
Industrial Boiler ◽  
Industrial Boilers ◽  
Secondary Air ◽  
Lower Biomass

Lower biomass briquette fuel Combustion efficiency for Stream-chain Boiler furnace burning dyeing factory,the existing Furnace arch configuration easily lead the front burning,easy to burn coal gate and ignite fuel bin.Proposed through the transformation of traditional industrial boiler feed systems,before and after the boiler arch configuration,add dedusting equipment,add the secondary air system and adjust primary air supply system to improve the boiler,which can effectively improve the combustion efficiency,to solve the question of coal gate back burning bad front wall and ignite fuel bin.Ease dust accumulation and slagging problems in the biomass boiler.

Development of Energy Saving Control System for Street Lamps Based on SCM

2011 ◽  
Vol 291-294 ◽  
pp. 2838-2841
Author(s):  
Shuang Li An ◽  
Rui Qian ◽  
Xiang Yu Lu ◽  
Yuan Lu
Keyword(s):  
Energy Saving ◽  
Intelligent Control ◽  
Smart Sensor ◽  
Light Control ◽  
Single Chip ◽  
Single Chip Microcomputer ◽  
Turn On ◽  
Wireless Transceiver ◽  
Energy Saving Control ◽  
Rainy Days

This paper presents a proposed energy saving system for street lamps based on single-chip microcomputer. In this case, light control timer, smart sensor, wireless transceiver, microcontroller smart regulator and other related techniques are utilized to fullfil a ‘green lighting project’. It can not only automatically turn on or off the master switch according to the local sunrise and sunset, and sooner or later, sunny day, rainy days or the actual brightness of the different lamps, but also control each single lamp intelligently. The system can be widely used in road and tunnel lighting, building lighting, and other fields as well as a variety of energy-saving control dimming voltage based intelligent control areas.

Oxygen Enriched and Oxyfuel Combustion - Promising Trends for Low Carbon Future

2011 ◽  
Vol 145 ◽  
pp. 11-15
Author(s):  
M. Tayyeb Javed ◽  
Bill Nimmo
Keyword(s):  
Flue Gas ◽  
Line Emission ◽  
Combustion Efficiency ◽  
Base Line ◽  
Exhaust Gas ◽  
Low Carbon ◽  
No Emission ◽  
Oxyfuel Combustion ◽  
Test Conditions ◽  
Secondary Air

The escalation of ambient CO2 concentration due excessive use of coal in power generation has put impetus on the development of technologies for utilization of vast and cheap resources available through out the world. Eco-scrub, Oxygen enriched and oxyfuel combustion are among the promising technologies guaranteeing the low carbon future. In our recent investigations, pulverized coal (Russian) was fired in a 20 kW down fired combustion rig under simulated exhaust gas recirculation. The effect of CO2 at burner inlet on the combustion efficiency, flue gas CO2 and NO emission was studied. The test conditions were essentially achieved by replacing the secondary air with a mixture of O2 and CO2 in different proportion. The test conditions do imitate the four key conditions for eco-scrub project. The basic theme under eco-scrub project is to use limited oxygen addition to reduce the volume of flue gas for processing, increase the efficiency of post combustion scrubbing due to higher CO2 levels and reduced the size and cost of post combustion capture. The exhaust gas CO2 was observed to increase linearly with increasing the CO2 at burner inlet. The flue gas concentration for 35% and 45% flue gas recycle was recorded to be 24% and 30% respectively. The NO emission was most of the time under the base line emission of 818 ppm. A maximum of 66% reduction was observed when the burner inlet CO2 was 45% and 21% O2. How ever an increase of 37% was seen when 80% of the secondary air was replaced with a 50%O2-50%CO2 mixture.

Design of Intelligent Energy-Saving Control System Based on Pyroelectrical Sensor

2014 ◽  
Vol 556-562 ◽  
pp. 2422-2425
Author(s):  
Qiu Jie Zhang ◽  
Cao Feng Yu ◽  
Qing Qing Huang
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Intelligent Control ◽  
Simple Structure ◽  
Low Cost ◽  
Human Movement ◽  
Infrared Sensor ◽  
Reliable Performance ◽  
Working Principle ◽  
Energy Saving Control

The control system uses pyroelectric infrared sensor as the detecting element, STC89C52RC microcontroller as the control core, to detect and determine the direction of human movement, demographics and intelligent control of indoor appliances. This control system has simple structure, reliable performance, low cost, it can be used in homes, school classrooms, large venue and other places, has good prospects. This article elaborates from the working principle, hardware circuits, program design and other aspects.

scholarly journals Investigations of operation problems at a 200 MWe PF boiler

2015 ◽  
Vol 36 (3) ◽  
pp. 305-320 ◽  
Author(s):  
Sandile Peta ◽  
Chris du Toit ◽  
Reshendren Naidoo ◽  
Walter Schmitz ◽  
Louis Jestin
Keyword(s):  
Flue Gas ◽  
Power Plants ◽  
Integrated Approach ◽  
Combustion Efficiency ◽  
Air Distribution ◽  
Oxides Of Nitrogen ◽  
Fuel Flow ◽  
Pulverized Fuel ◽  
Air Flows ◽  
Secondary Air

Abstract To minimize oxides of nitrogen (NOx) emission, maximize boiler combustion efficiency, achieve safe and reliable burner combustion, it is crucial to master global boiler and at-the-burner control of fuel and air flows. Non-uniform pulverized fuel (PF) and air flows to burners reduce flame stability and pose risk to boiler safety by risk of reverse flue gas and fuel flow into burners. This paper presents integrated techniques implemented at pilot ESKOM power plants for the determination of global boiler air/flue gas distribution, wind-box air distribution and measures for making uniform the flow being delivered to burners within a wind-box system. This is achieved by Process Flow Modelling, at-the-burner static pressure measurements and CFD characterization. Global boiler mass and energy balances combined with validated site measurements are used in an integrated approach to calculate the total (stoichiometric + excess) air mass flow rate required to burn the coal quality being fired, determine the actual quantity of air that flows through the burners and the furnace ingress air. CFD analysis and use of at-the-burner static, total pressure and temperature measurements are utilized in a 2-pronged approach to determine root-causes for burner fires and to evaluate secondary air distribution between burners.

scholarly journals Combustion of Agricultural Wastes/Coal in Circulating Fluidized Bed

2020 ◽  
Vol 9 (1) ◽  
pp. 1156-1165
Keyword(s):  
Fluidized Bed ◽  
Faba Bean ◽  
Flue Gas ◽  
Circulating Fluidized Bed ◽  
Clean Energy ◽  
Combustion Efficiency ◽  
Agricultural Wastes ◽  
Nox Emissions ◽  
Excess Air ◽  
Secondary Air

This paper presents an experimental investigation on circulating fluidized bed (CFB) combustion of one of agricultural wastes (faba bean hulls) and co-combustion faba bean hulls and Egyptian (Sinai) coal. The test rig is a pilot scale CFB combustor of 145 mm inner diameter, 2 m tall and 100 kW thermal capacity. The influences of excess air, degree of air staging, bean hull particle size and coal share were studied. Temperature, heat flux, CO, NOx and SO2 concentrations along the reactor height and flue gas out from cyclone were measured. The combustion efficiency was calculated based on CO emission and unburned char in flue gas. The results showed that size reduction of bean hulls results in lower CO and NOx emissions. The induction of secondary air has a negative effect on combustion efficiency. The highest efficiency recorded for bean hulls combustion was 98.5% at excess air ratio (EA) =1.09 without secondary air. Co-combustion of Sinai coal and bean hulls reduced CO and NOx emissions but increased SO2 emissions. The results suggest that bean hulls are potential fuel that can be utilized for efficient and clean energy production by using CFB combustion system especially at co-combustion.

Classroom Lighting Energy-Saving Control System Based on Machine Vision Technology

2018 ◽  
pp. 143-149 ◽  
Author(s):  
Ruijie CHENG
Keyword(s):  
Control System ◽  
Machine Vision ◽  
Energy Saving ◽  
Back Propagation ◽  
Back Propagation Neural Network ◽  
Lighting Control ◽  
Lighting Energy ◽  
Neural Network Algorithm ◽  
Energy Saving Control ◽  
Model Algorithm

In order to further improve the energy efficiency of classroom lighting, a classroom lighting energy saving control system based on machine vision technology is proposed. Firstly, according to the characteristics of machine vision design technology, a quantum image storage model algorithm is proposed, and the Back Propagation neural network algorithm is used to analyze the technology, and a multi­feedback model for energy­saving control of classroom lighting is constructed. Finally, the algorithm and lighting model are simulated. The test results show that the design of this paper can achieve the optimization of the classroom lighting control system, different number of signals can comprehensively control the light and dark degree of the classroom lights, reduce the waste of resources of classroom lighting, and achieve the purpose of energy saving and emission reduction. Technology is worth further popularizing in practice.

Modeling and Experiment on Combustion Characteristics for Biomass Rotary Burner

2020 ◽  
Vol 04 ◽  
Author(s):  
Guohai Jia ◽  
Lijun Li ◽  
Li Dai ◽  
Zicheng Gao ◽  
Jiping Li
Keyword(s):  
Combustion Chamber ◽  
Combustion Temperature ◽  
Combustion Efficiency ◽  
Middle Part ◽  
Combustion Characteristics ◽  
Maximum Temperature ◽  
Excess Air ◽  
Element Simulation ◽  
Excess Air Coefficient ◽  
Secondary Air

Background: A biomass pellet rotary burner was chosen as the research object in order to study the influence of excess air coefficient on the combustion efficiency. The finite element simulation model of biomass rotary burner was established. Methods: The computational fluid dynamics software was applied to simulate the combustion characteristics of biomass rotary burner in steady condition and the effects of excess air ratio on pressure field, velocity field and temperature field was analyzed. Results: The results show that the flow velocity inside the burner gradually increases with the increase of inlet velocity and the maximum combustion temperature is also appeared in the middle part of the combustion chamber. Conclusion: When the excess air coefficient is 1.0 with the secondary air outlet velocity of 4.16 m/s, the maximum temperature of the rotary combustion chamber is 2730K with the secondary air outlet velocity of 6.66 m/s. When the excess air ratio is 1.6, the maximum temperature of the rotary combustion chamber is 2410K. When the air ratio is 2.4, the maximum temperature of the rotary combustion chamber is 2340K with the secondary air outlet velocity of 9.99 m/s. The best excess air coefficient is 1.0. The experimental value of combustion temperature of biomass rotary burner is in good agreement with the simulation results.

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