Introduction
If water is present after the dry chlorine tower in brine electrolysis plants, the downstream compressor is corroded or the product quality is deteriorated. The moisture level is measured before and after the compressor to prevent the corrosion of the compressor and the deterioration of quality. Conventional trace moisture analyzers using a phosphorus pentoxide (P2O5) sensor measure process gas with the contacting sensor so there are problems such as the deterioration of the sensor, slow response time, high maintenance, and high running costs. The TDLS8000 Laser Analyzer is the solution to these problems.
Process Overview
Chlorine gas generated in the brine electrolysis plant is dehumidified in the wet chlorine tower and sent to the drying tower where the chlorine gas is dried using sulfuric acid solution. The dried chloride gas is sent to the dry chloride tower where the gas is dehumidified, and finally, the dry chloride gas is compressed by the compressor and liquefied, and then shipped as a product.
Expected Benefits
- Reliable measurement with less deterioration by non-contact measurement
- Ability to measure even corrosive gasses with less deterioration reduces the maintenance and running costs
- Fast response to and stable measurement of changes in H2O concentration
Electrolysis Plant
Solution Details
Unlike analyzers using a phosphorus pentoxide (P2O5) sensor, the TDLS responds fast to changes in the trace moisture of the sample.
Field Data
Responsiveness Comparison between the TDLS and Moisture Analyzer Using P2O5 Sensor
Configuration Example of TDLS8000 Laser Analyzer Trace Moisture Measurement
A sampling system is used to introduce a process gas into the flow cell to measure it.
Features
- A proprietary sampling method enables a high-sensitivity measurement (in the minimum range of 0-30 ppm)
- In-situ calibration is possible without removing the system
- The sampling system minimizes the effect of moisture in the purge gas
TDLS Analyzer
- TDLS8000
Available on a special order basis.
Notes
- Power supply: 100 - 240 V AC, 50/60 Hz
- Purge gas: Instrumentation and N2
Inside the sampling board and the light emitter and light receiver boxes
Purge: Instrumentation air 10 L/min
Laser light transmission region purge: N2 flow rate 5 L/min
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Whether you produce petrochemicals, inorganics or intermediates, chemical companies are under cost and margin pressures to deliver products in a timely and efficient manner while maintaining safe and compliant operations. Additionally, chemical companies need to adjust to fluctuating feedstock and energy prices and to provide the most profitable product mix to the market.
Yokogawa has been serving the automation needs of the bulk chemical market globally and is the recognized leader in this market. With products, solutions, and industry expertise, Yokogawa understands your market and production needs and will work with you to provide a reliable, and cost effective solution through the lifecycle of your plant.
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Base Chemical
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Petrochemical
Petrochemical companies’ needs are extremely diverse. To come out ahead in today’s highly competitive marketplace, producers are striving to improve quality and productivity. Yokogawa provides tailor-made solutions for these needs based on its long and wide-ranging experience in this field.
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