Improving Productivity by Visualizing Variations in Temperature Inside the Reactor

The DTSX is a unique and innovative temperature monitoring system that uses a fiber optic cable as a temperature sensors.

Current Issues

Impacts of Nonuniformity in Temperature for Resins and Other Materials inside Reactors on Productivity, Quality, and Management

In some cases, temperature nonuniformity inside operating reactors affect the productivity and quality of products.

In general, a reactor is only equipped with several thermometers, which hardly help you check temperature nonuniformity inside the reactor.

When increased efficiency has promoted plant integration and upsizing, resulting in decreased productivity and deteriorated quality, it not only leads to late deliveries but also impacts the supply chain, which will have direct impacts on the society and management.

Impacts of Nonuniformity in Temperature for Resins and Other Materials inside Reactors on Productivity, Quality, and Management


Solutions and Benefits

Fiber Optic Cables Allow You to Recognize Variations in Temperature inside Reactors from Outside

Reactors are equipped with point sensors, which are capable of measuring temperatures inside reactors; these sensors are several in number, which are unevenly distributed in a certain direction at intervals of several meters, often indicating uniform temperature.

When you manufacture a resin or the like from the same material and with the same parameters, you may not always achieve the same-level productivity and / or quality. If this is the case, it is required not only to secure the same level productivity and / or quality, but also to spend time and effort in determining the cause (s) and taking countermeasures.

It is considered that cause analysis requires temperature nonuniformity inside the reactor to be checked as one the factors; however, in realty, there is no way to check the nonuniformity.

reactor and DTSX

DTSX distributed temperature sensor allows you to relatively recognize temperature nonuniformity inside the reactor from outside, using a fiber optic cable installed on the surface of the reactor to totally measure reactor surface temperatures.

The DTSX is used to improve productivity and quality by checking temperature nonuniformity inside reactors and feeding back that information to be reflected as an operational indicator.
Supposing that a facility with annual production of 300,000 tons has improved its productivity by 0.3 % , it increases its production amount 900 tons, resulting in a yield improvement of 900 million yen a year (with an assumption that the yield is 100,000 yen / ton).

Temperature distribution of reactor


Features of Optical Fiber Sensing in DTSX System

Features of "Optical Fiber Sensing" in DTSX System

Temperature distribution monitored every 1 m

  • Monitoring distance: to 50 km
  • Monitoring temperature: -200 to 300 °C
  • Shortest monitoring cycle: Approx. 5 seconds
  • Temperature resolution: 0.03°C 

* Each specification dependent on conditions

Main Features

  • 24 hours a day, 365 days a year monitoring even in wide areas and ordinarily non-manned areas
  • Power supply not required, explosion-proof, not affected by electromagnetic noise
  • Flexible installation
  • High compatibility with DCS and other host systems (Modbus / TCP)


Related Applications

Monitoring of Soundness of Power Supply Bus Bar
  • Monitoring the Soundness of High-Temperature Reactor Bodies

    DTSX monitors the soundness of the refractory bricks inside high-temperature reactor bodies. It detects any abnormality that may lead to a shell breakage at an early stage by checking for hot spots on the reactor body surface to determine whether refractory bricks inside are damaged.
    (For details, refer to "Furnace Monitoring for Safety and CBM".)

Monitoring of Soundness of Power Supply Bus Bar
  • Checking of Separator / Electrode Coating Drying Furnace Temperature Distribution

    The temperature distribution inside the drying furnace of the coating drying process for the separators / electrodes that make up a lithium-ion battery is visualized. Optimizing the temperature profile improves productivity.
    (For details, refer to "Fiber Optic Cable Visualizes In-furnace Temperature Distribution".)

    Fiber Optic Cable Visualizes In-furnace Temperature Distribution


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