On-Line Monitoring System for Monitoring SO2 in Fumes (1) — Monitoring Subsystem for SO2 Mass Concentration

2011 ◽  
Vol 422 ◽  
pp. 296-299
Author(s):  
Shi Long Wang ◽  
Li Na Wang ◽  
Hong Bo Wang ◽  
Yong Hui Cai
Keyword(s):  
Flow Velocity ◽  
Monitoring System ◽  
Flow Rate ◽  
Mass Concentration ◽  
National Monitoring ◽  
Monitoring Result ◽  
Short Period ◽  
On Line ◽  
Working Principle

In order to achieve the target of controlling SO2 emissions in fumes in a short period of time in China, a SO2 on-line monitoring system (CEMS) has been developed by the authorased on the principle of electrochemistry. This system consists of two subsystems: (1) SO2 mass concentration monitoring and (2) SO2 flow velocity and flow rate monitoring. In the paper, the procedure of system and working principle and method of SO2 mass concentration monitoring subsystem are described in detail (SO2 flow velocity and flow rate monitoring subsystem is described by another paper).Two subsystems work synchronously to monitor and calculate the SO2 emissions, then the on-line monitoring of SO2 emissions is achieved. Through experiment and testing, monitoring result of the system is stable and reliable, which has reached the national monitoring standards and passed the appraisal.

On-Line Monitoring System for Monitoring SO2 in Fumes（2） — Monitoring Subsystem for SO2 Flow Velocity and Flow Rate

2011 ◽  
Vol 422 ◽  
pp. 233-237
Author(s):  
Shi Long Wang ◽  
Li Na Wang ◽  
Yong Hui Cai ◽  
Hong Bo Wang
Keyword(s):  
Velocity Field ◽  
Flow Velocity ◽  
Monitoring System ◽  
Flow Rate ◽  
Mass Concentration ◽  
Technical Difficulty ◽  
Line System ◽  
Average Flow Velocity ◽  
On Line ◽  
Working Principle

A SO2 on-line monitoring system (CEMS) has been developed by the author based on the principle of electrochemistry. This system consists of SO2 mass concentration monitoring subsystem (the subsystem had been described in on-line system for monitoring SO2 in fumes（1）) and SO2 flow velocity and flow rate monitoring subsystem. In the paper, the working principle and procedure of SO2 flow velocity and flow rate monitoring subsystem are described in detail. In the meantime, an advanced method for measuring average flow velocity of fumes by mean of “velocity field constant” is presented. A innovative device has been developed to detect velocity field constants automatically, which has resolved the technical difficulty in automated monitoring of fumes average velocity in the flue.

Method for Monitoring Average Flow Velocity of Fumes by Mean of Velocity Field Constant

2012 ◽  
Vol 170-173 ◽  
pp. 2609-2612
Author(s):  
Li Na Wang ◽  
Yong Hui Cai ◽  
Hong Bo Wang ◽  
Shi Long Wang
Keyword(s):  
Velocity Field ◽  
Flow Velocity ◽  
Flow Rate ◽  
Technical Problem ◽  
Technical Difficulty ◽  
Monitoring Method ◽  
Average Flow ◽  
Average Flow Velocity ◽  
Short Period ◽  
On Line

In order to achieve the target of controlling SO2 emissions in fumes in a short period of time in China, it is necessary to develop a SO2 on-line monitoring system (CEMS) that is suitable for China. To monitor total emissions of SO2 in fumes, the concentration of SO2 in the fumes and fumes flow rate must be monitored simultaneously. To monitor fumes flow rate, first we must monitor its average flow velocity, this is a major technical problem need to solve in the SO2 CEMS. By means of study on velocity field constant in flue, An advanced method for monitoring average flow velocity of fume by mean of velocity field constant is presented, meanwhile an innovative device has been developed to detect velocity field constants automatically, which has resolved the technical difficulty in automated monitoring of fume average velocity in the flue. Through experiment and testing, the monitoring method researched is correct, structure of detecting device is reasonable, its monitoring results are stable and reliable.

scholarly journals Research on a Piezoelectric Pump with Flexible Valves

2021 ◽  
Vol 11 (7) ◽  
pp. 2909
Author(s):  
Weiqing Huang ◽  
Liyi Lai ◽  
Zhenlin Chen ◽  
Xiaosheng Chen ◽  
Zhi Huang ◽  
...  
Keyword(s):  
Flow Rate ◽  
Fluid Transport ◽  
Smooth Transition ◽  
Driving Voltage ◽  
Piezoelectric Pump ◽  
Venous Valve ◽  
Output Pressure ◽  
Small Flow ◽  
Working Principle ◽  
Opening And Closing

Imitating the structure of the venous valve and its characteristics of passive opening and closing with changes in heart pressure, a piezoelectric pump with flexible valves (PPFV) was designed. Firstly, the structure and the working principle of the PPFV were introduced. Then, the flexible valve, the main functional component of the pump, was analyzed theoretically. Finally, an experimental prototype was manufactured and its performance was tested. The research proves that the PPFV can achieve a smooth transition between valved and valveless by only changing the driving signal of the piezoelectric (PZT) vibrator. The results demonstrate that when the driving voltage is 100 V and the frequency is 25 Hz, the experimental flow rate of the PPFV is about 119.61 mL/min, and the output pressure is about 6.16 kPa. This kind of pump can realize the reciprocal conversion of a large flow rate, high output pressure, and a small flow rate, low output pressure under the electronic control signal. Therefore, it can be utilized for fluid transport and pressure transmission at both the macro-level and the micro-level, which belongs to the macro–micro combined component.

Research on Wireless Vibration Monitoring System for Devices in the Engine Room

2012 ◽  
Vol 503-504 ◽  
pp. 1651-1654
Author(s):  
Guo Yong Zhang ◽  
Shuo Wu
Keyword(s):  
Monitoring System ◽  
Vibration Sensor ◽  
Vibration Monitoring ◽  
Vibration State ◽  
Engine Room ◽  
On Line ◽  
The Common

The vibration can influence the running of devices in the engine room. It is necessary to monitor the vibration state of all running machineries. Through integrating the Bluetooth technology into the common vibration sensor, a wireless on-line vibration monitoring system is designed to monitor all devices. It will be helpful to avoid severe failure and improve the cruising ability.

Development of the On-Line Monitoring System for Fuel Cell Voltage

2011 ◽  
Vol 219-220 ◽  
pp. 383-386
Author(s):  
Jing Li ◽  
Hong Pan ◽  
Shu Juan Zhang ◽  
Ling Fang Sun
Keyword(s):  
Fuel Cell ◽  
Monitoring System ◽  
Software Design ◽  
Output Voltage ◽  
Cell Voltage ◽  
Development Environment ◽  
Fuel Cell Stack ◽  
Actual Application ◽  
On Line ◽  
And Storage

According to the single battery's series structure in the fuel cell stack, we develop an on-line fuel cell voltage monitoring system, and realize VISA library functions’ call and operation data acquisition and storage successfully in the Delphi development environment. It’s introduced mainly that the monitoring principle, hardware structure, software design and the main feature. The actual application proves that this system has realized high-precision and real-time monitoring of the output voltage of the fuel cell for multi-channel, and has multi-condition operation by setting original parameters easily, thereby, the system has more applicability and well reliability.

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