The hottest Rosemount glass furnace temperature mo

  • Detail

Rosemount glass furnace temperature monitoring applications in aerospace, semiconductor and optical industries

project background

Corning semiconductor materials manufacturing plant in Canton, New York specializes in the production of high-tech glass products for aerospace, semiconductor and optical industries. Two years ago, Corning chose Emerson Process Management to re equip its process system with PlantWeb products equipped with foundation fieldbus technology with some relevant information about the experiment

Canton factory produces three products: high purity quartz glass (HPFS), ultra low expansion (ule) glass and fluorinated crystals. High purity quartz glass is the purest form of glass in the world, which is used to make glass windows on space shuttles and space stations. Ultra low expansion glass has a thermal expansion coefficient of parts per billion, which is used in the mirrors of large telescopes, including the Hubble Space Telescope. Fluorinated crystals are produced by growing crystals in a vacuum chamber. This product is specially developed for the next generation of optical machinery in the semiconductor industry

project background:

Corning has updated 12 vapor deposition furnaces for the production of high-quality glass products. In order to improve product quality and output and reduce the overall operation cost, these process systems should be re equipped. Corning chose to provide PlantWeb products supported by the foundation (f carbon nanotubes have good heat transfer performance, origin) fieldbus, and chose Fisher Rosemount DeltaV control system to jointly achieve these project goals. Corning predicts that this architecture will save them 3/4 person years (about $35000 per year) in calibration costs, of which% comes from temperature control. So far, Corning has purchased the following products for the project: 86 848t eight position input temperature transmitters, 15 3244mvf temperature transmitters, 70 3051 pressure transmitters, 39 Fisher DVC control valves, 38 micro cmf10/25 flow meters and a DeltaV control system

temperature control application:

the temperature control application of each vapor deposition glass furnace includes 16 monitoring points, 8 non critical control points and 1 critical control point. The four furnaces are located in an area about 200 feet from head to tail, and each temperature sensor measures an average distance of 150 feet from the DeltaV i/o cabinet. Rosemount 848t eight position input temperature transmitter selected by Corning ensures thermocouple measurement communication, which is used to monitor the temperature of air, oil and water at different positions of the furnace. Each 848t temperature transmitter uses an eight bit analog input (AL) function block to measure and communicate through the field bus section

3244mvf temperature transmitter is used to control the critical inlet temperature of raw materials. Due to the critical characteristics of this measurement, Corning used 32444mvf hot backup for 15 years, transmitter sensor matching and sensor drift alarm to improve accuracy and process output. In particular, the sensor drift alarm function can send information when the critical temperature control point requires recalibration. Each 3244mvf temperature transmitter uses two Al, one PID and one input selector (ISEL) function blocks, and has the backuplink active scheduler function

848t value:

in order to monitor the temperature, Corning compared the 848t temperature transmitter with the situation of connecting the thermocouple directly to the DeltaV thermocouple i/o card. Corning chose to use 848t for this project because it is a more cost-effective solution. They can connect the existing sensor wiring to the following 84. Jinan Shijin will provide you with an approximate cycle: 8t, which greatly simplifies the wiring and significantly reduces the installation cost. Corning estimates that the 848t plan will save $10000 for them to re equip 12 vapor deposition furnaces

in addition, by applying 848t to the fluorination crystal process, other expenses are also saved, because expensive C-type thermocouple wires are highly concentrated in this process control. The 848t meets a variety of sensor input types and has a wide range of applications. Each transmitter can receive 8 sensor signals. Using this solution, the cost savings are significant

Steve Edwards, director of engineering and information technology control at Corning Canton factory, once said, "the 848t provides a very clean solution for our temperature monitoring application. The 848t is easy to configure and replace the thermocouple model. Everything has worked very well since it was started. So far, the 848t solution has brought us very accurate results." Steve has gained more and more experience in using 848t in the vapor deposition furnace and tried to apply it to the new process control of the factory

Copyright © 2011 JIN SHI