DESIGN oF INSTRUMENTATIoN

Design of Instrumentation for a Furnace Process

[Name of the Writer]

[Name of the Institution]

Design of Instrumentation for a Furnace Process

With the rapidly changes on industries and information technologies in recent years, some traditional bulk electronic appliances have to be monitored for a long time. All of their control devices such as communication interfaces gradually enter the Intemet information era. The control of all equipment has been performed through the use of computers. Most equipment uses PLC to connect with computers to monitor each load and electricity consuming devices. Programmable Logic Controllers (PLC) are widely used in industrial control because they are inexpensive, easy to install and very flexible in applications. A PLC interacts with the external world through its inputs and outputs. PLC has been providing sensors to the industry for over 20 years. Their sensors are UL 916 certified and RoHS compliant. Quite simply, they measure light levels, telling the controller how much additional light is required to maintain proper light levels. They are always reliable and always accurate. Each sensor is specifically designed for use in outdoor, indoor, skylight and atrium applications. They integrate easily into all PLC lighting control systems as well as those of other manufacturers.

MAS Sensor: The MAS is a light level sensor. The sensor is powered by 24VDC, providing a 4-20mA signal.

CES Sensor: The CES belongs to a family of sensors that monitor either task or ambient light levels precisely. The light level measured is converted to an analog signal that is sent to the controller of the Energy Management System (EMS).

PD Sensor: The PD is a Class 2, low voltage light sensor designed to provide input to PLCBuildings controllers. PD sensor models are available in a wide variety of light sensing ranges and housing styles.

Blast furnace instrumentation has advanced dramatically in the past 50 years. As productivity demands on blast furnace increased and the reductant rates decreased, it became critical to monitor and understand more data for the process. New and improved instrumentation devices were invented and installed throughout the industry. The shared knowledge has enabled blast furnace operators and engineers to accomplish dramatic production increases, to lower the reductant rate, to introduce new types of reductants, and ultimately lead to better designs and control of the blast furnace process. The modern blast furnace control system can be divided into several discrete layers to effect information and control of the blast furnace process, as is illustrated below:

The 1st layer of the architecture comprises the field devices, referred to as Level 0. These are actual instruments, valves, motors etc., which measure and control the pressures, flows, temperatures, positions and analyses of the process. The 2nd layer is the programmable logic controller (PLC) and/or distributed control system (DSC), referred to as Level 1. In this level the raw field data is initially processed. The information to and from the field devices is interfaced with this area where sequencing, logical control, instrumentation monitoring, alarming, first level diagnostics and operation of the different ...