Contact method: sulphuric acid and fuming sulfuric acid

Sulfuric acid and fuming sulfuric acid concentration control

Sulfuric acid and fuming sulfuric acid can be used for different purposes, such as used in the production of fertilizers, explosives, dye, and petroleum products.Sulfuric acid can be formed H₂SO₄Aqueous solution or add too much sulfur trioxide (SO₃), the latter is called fuming sulfuric acid or focal sulfuric acid.

Recycling or metallurgical industry by burning sulfur and acid produced by sulphur gas using the contact method of production of sulfuric acid and fuming sulfuric acid.The process including sulfur dioxide (SO₂) catalytic oxidation for SO₃And through the absorption SO in concentrated acid₃The hydration for H₂SO₄.Contact factory can use single contact method or double contact method.

In the double contact method (also known as double contact double absorption, DCDA), contains the SO₂The dry gas chamber will be sent to contact.Then, the gas from the eduction in the third catalytic bed, after cooling into primary absorption tower, in which the use of concentrated sulfuric acid SO (about 98%)₃.Later, the residual gas (mainly the SO₂) the fourth bed room to return to the contact.

After contact chamber, gas continues to enter the final absorption tower, in which using concentrated acid absorption SO again₃.The final product is stored in a dilution tank fuming sulfuric acid, can be diluted with water to obtain the required concentration.Liquid concentration is usually held at 98%, in order to avoid acid to escape from the liquid.

Visa K - PATENTS^®Online refractometer method of sulfuric acid production process can be used to contact the following stages:

• In a dry, absorb and dilution steps of monitoring and controlling the concentration of acid, to ensure the H₂SO₄The concentration of the constant in 93, 98 or 104% (mass percent).
• In the mixed concentrate after acid concentration control
• Control into the tower circulating acid, ensure its concentration to keep within the scope of the ideal, and promote absorption effect.

Fuming sulfuric acid production process of the final product is sticky, and contain a small bubbles.However, bubbles, traffic, or a color change will not affect refractometer measurement in situ.Due to the use of special hydraulic components, the refractometer can withstand harsh and corrosive environment.It also has the essential safety and hazardous area certification.

Read the application instructions, detailed understanding of contact method of sulfuric acid and fuming sulfuric acid production process.

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