Temperature Monitoring on PID loop at Steel Process

下載 (481 KB)

Introduction

ISA 100 WirelessDirect Reduction Iron (DRI) is one of the processes to reduce oxygen from iron oxide pellets for steel plant. More than 90% of DRI processes use heated LNG as process gas where PID control for temperature or interlock control is of vital importance.

 

Direct Reduction Iron

Requirement and Background

Reliable temperature measurement without frequent cable replacement is needed.

One of the major problems faced by the user is frequent replacements of cables as those gets degrade faster because of high ambient temperature and process vibrations. These cable replacements increases the operational cost as well as cost of man hours.

Solution

Temperature measurement over the radio as part of PID control loops, Interlock control loops and monitoring at DRI process were introduced. (For shaft furnace, gas reformer and other process pipes)

Highly reliable and full redundant wireless system realized this control loop application.

Two pairs of Redundant Access Point YFGW510 with a Duocast1 wireless communication were connected to a pair of Redundant Management Station YFGW410. Redundant Modbus TCP interface for non-Yokogawa DCS2 achieved stress free interoperability.

Result

The installation was completed in 2013 and the measured results for 120 temperature inputs were found satisfactory.

In dense area, out of line of sight devices up to 50m communicated successfully with less than 5% Packet Error Rate.

Benefits

  • Higher uptime of process
  • Operational cost reduction
  • Risk reduction: cable degradation, noise interference
  • Less installation costs and time: wiring, cable rack, junction box and etc.
Duocast System

Conclusion

This result proved that Yokogawa's high reliable wireless is very effective for DRI process. Deterministic routing algorism makes the communication latency shortest and fully redundant system with Duocast1 system can provide robust control loops. The High Performance "Radio Chip" embedded in these wireless devices helps to achieve High Quality Communications even in dense areas.

After 12 months or more operation, now the customer is considering expanding wireless applications in their site.

  1. Duocast: wireless redundant communication system standardized at ISA100 wirelessTM on double active access points with minimum wireless latency.
  2. The Yokogawa's CENTUM VP R5 or later supports dual-redundant network configuration with YFGW410 field wireless management station. It enables entire system full redundant. Please consult Yokogawa regional sales in case of engaging full redundant ISA100 wireless network system with 3rd party DCS.

 

產業別

相關產品&解決方案

YFGW410現場無線管理站

YFGW410現場無線管理站以國際自動化協會(ISA)的工業自動化無線通訊標準ISA100.11a為基準。該產品具有符合ISA100.11a標準的系統管理/安全管理/網關功能,與現場無線接入點(YFGW510)和/或現場無線媒體轉換器(YFGW610)組合,構成現場無線系統。

YFGW510/YFGW520現場無線接入點

YFGW510/YFGW520現場無線接入點以國際自動化協會(ISA)的工業自動化無線通訊標準ISA100.11a為基準。該產品具有符合ISA標準的主干路由器功能,與現場無線管理站(YFGW410)和/或現場無線媒體轉換器(YFGW610)組合,構成現場無線系統。

YTA510無線溫度變送器

高性能溫度變送器YTA510接收熱電偶、RTD、歐姆或DC mV輸入訊號。該變送器通製無線訊號傳輸製程變量以及設定參數。該變送器採用內定電池,由於無需硬接線,因此可降低安裝成本。通訊規格以ISA100.11a協議為基礎。

YTMX580多點輸入溫度變送器

YTMX580最多可接收8點測量輸入值,如熱電偶(8種類型:K、E、J等)或RTD訊號(3種類型:Pt100等),並將相應的測量輸入值轉換為無線訊號。它也可以接收DC電壓、電阻和4~20 mA DC訊號輸入。

現場無線

無線解決方案的靈活性可減少對基礎設施的投入,同時可以對工廠運營有更深入的了解。

×

Have Questions?

Contact a Yokogawa Expert to learn how we can help you solve your challenges.

置頂