Electrolysis plants create hydrogen and chlorine from a brine solution. Chlorine gas generated from the anolyte of the electrolysis tank generally contains between 0.5 to 2.0 vol% H2O. The sample is then cooled and filtered to remove brine, subsequently coming out as wet chlorine gas. The wet gas is sent to a drying tower where it is treated with sulfuric acid to get moisture down to the ppm level. Acid mist remains in the dry chlorine gas and is sent to a dry chloride tower to remove the mist. The dry chlorine gas is then sent to a reciprocating compressor for liquefaction.
The presence of moisture after the dry chloride tower, even at trace levels, causes corrosion of the chlorine compressor and contaminates the product with chlorine hydrate and hydrous iron chloride. Trace moisture levels are conventionally monitored before and after the compressor using phosphorous pentoxide (P2O5) sensors. The P2O5 sensors have slow response times, high maintenance costs (both time and money), and eventually deteriorate due to process contact.
- Quick identification of process upset and consequently corrective action
- Avoiding equipment damage and/or product contamination
- Highly sensitive measurements in the minimum range of 0-30ppm H2O
- In-situ online validation and calibration minimizes downtime
For additional information please contact Analytical Product Marketing
Yokogawa has been serving 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.
Bulk & Petrochemical
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.
Chemical plants rely on continuous and batch production processes, each posing different requirements for a control system. A continuous process calls for a robust and stable control system that will not fail and cause the shutdown of a production line, whereas the emphasis with a batch process is on having a control system that allows great flexibility in making adjustments to formulas, procedures, and the like. Both kinds of systems need to be managed in available quality history of product, and to be able to execute non-routine operations. With its extensive product portfolio, experienced systems engineers, and global sales and service network, Yokogawa has a solution for every plant process.
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