Sulfuric acid manufacturers how to make use of visa pull liquid density measurement technology to ensure the quality of the products
Customer: Boliden
Visa technology: in situ online refractometer
Challenge: to ensure high purity accurate concentration of sulphuric acid production
Boliden as sulfuric acid (H2SO4) producers, rowan island (Ronnskar) in Sweden, Finland Hal YaWaEr tower (Harjavalta) and coco (Kokkola), and Norway's Mr (Odda) has factories, four high-quality sulphuric acid plant can produce about 1.7 million tons per year.This kind of strong corrosive colorless acid is a by-product of the process for processing zinc, can be used in the production of fertilizer and chemicals and pulp and paper and mining.Commercial sulfuric acid concentration needed for the customer is usually between 93% and 98%.In order to achieve accurate concentration of different customer requirements, Boliden diluted the pure sulfuric acid.In order to provide customers with quality products, the company adopted the concentration of the visa, reliable and accurate measurement technology to control the process of dilute sulfuric acid.
Solution: the steady accurate on-line measurement technology
In the process of dilution, the accurate concentration measurement is very important.Acid corrosion resistance for the selected technology brought further challenges.Boliden adopted visa with mature and stableOnline refractometer technologyThree key benefits for chemical production process:
Strong, resists corrosion
, can provide the stable liquid concentration within the whole range measurement (see below)
• measurement accuracy is not affected by bubbles, color, or the velocity changes
When the concentration of measuring between 85-100% of sulfuric acid, visa, online refractometer measurement results than density meter more accurate and more reliable.Density curve will flatten, said after the 94% density meter cannot reach or exceed 95% of the measured concentration solution.
Transportation and storage
To dilute Boliden production of sulfuric acid can also reduce the freezing point, so that the storage and transportation.
High concentration of sulfuric acid (98%), for example, the freezing point of + 3 ° C.It will be diluted to 93-96% (by weight), will drop to freezing point - 20 ° C, so storage and transport more easily, especially in winter.Below explains why it is important to detect the exact concentration of dilute sulphuric acid: once the sulfuric acid concentration less than 93%, freezing point will rise.
Dilution process of how to operate
Concentrated sulfuric acid and dilute with water is pumped into a loop in the middle of the product tank.Installed in a loop in the visa in situ online refractometer can accurately monitor the concentration of the solution, in order to ensure dilution to the appropriate level.
Graph: installed in the loop visa online after the refractometer dilute sulfuric acid process.Dilution is an intermittent process.
Through expert collaborative development, customized measurement solutions
Boliden measurement solutions in Finland's online by visa, refractometer distributors Kontram supply.Automation and measurement solutions, the company focused on online refractometer in visa team's support, for the application of many industrial customers to provide professional knowledge and customer support.
To learn more about is suitable for your specific application visa online refractometer solutions, please visitOnline refractometer page.To discuss your measurement requirements,Please to our website to find your local visa contacts, or sendContact requestTo us, our professional staff will contact you.
