Chlor alkali chemical free ammonium total ammonium online analyzer for water quality monitoring

chlor-alkali chemical industryFree ammonium/total ammoniumThe core goal of online water quality monitoring is to accurately control the ammonium content in the refined brine entering the tank, prevent and control the explosion risk of nitrogen trichloride (NCl ∝) from the source, and meet environmental discharge requirements.

Security CoreAmmonium (NH ₄⁺) in salt water reacts with chlorine gas to form NCl ∝, and its enrichment can easily cause explosions. The ammonium content must be strictly controlled to ensure production safety.

Mandatory control standards(According to GB 11984-2024):

• Refined saltwater entering the tankInorganic ammonium ≤ 1 mg/L、Total ammonium ≤ 2 mg/L.

• The NCl ∝ emissions from the liquid chlorine system are ≤ 0.5 wt% to reduce the risk of enrichment explosion.

environmental requirementsThe ammonia nitrogen (NH ∝ - N) at the discharge outlet meets the local and national emission standards.

Application background:

In the chlor alkali industry, saturated brine is a key raw material for the electrolysis of chlorine gas and caustic soda. If the saltwater contains excessive ammonium ions, explosive nitrogen trichloride (NCl3) may be generated during the electrolysis process, posing a serious threat to production safety. Therefore, the total ammonium content must be reduced to 1ppm before entering the electrolytic cell

The determination of total ammonium content is an important pre control measure to prevent safety accidents within the following safety range.

Through regular testing of free ammonium and total ammonium in saltwater, targeted control measures can be taken, such as adding sodium hypochlorite for oxidation reaction, and then removing it by air blowing. Effective chlorine in refined saltwater needs to be maintained at 5-10 mg/L to ensure ammonium removal.

The total ammonium content in refined brine is ≤ 4ppm, and the NCl3 content in liquid chlorine is ≤ 10ppm, greatly improving the safety and stability of the system.

The M-5010-NH4+free ammonium/total ammonium online analyzer produced by our company for saturated saline solution is based on the principle that the water sample is converted into ammonium sulfate after high-temperature digestion in sulfuric acid and copper sulfate solution, and then the ammonia gas is blown off by adjusting the pH value>12, absorbed by an absorbent, and measured by spectrophotometry. This method complies with relevant testing standards, and the testing is accurate and reliable!