How to Effectively Monitor Chlorine Concentration in the Chemical Industry Under Industrial Environments?

Under normal temperature and pressure, chlorine gas is yellow-green, a highly toxic gas with a strong pungent odor. It has a higher density than air, is soluble in water, easy to compress, and can be liquefied into yellow-green oily liquid chlorine. As one of the main products of the chlor-alkali industry, it can be used as a strong oxidant. When chlorine gas is mixed with hydrogen with a volume fraction of more than 5%, it may explode when exposed to strong light. Chlorine gas is toxic; it mainly invades the human body through the respiratory tract and dissolves in the moisture contained in the mucous membranes, causing damage to the upper respiratory tract mucosa. Chlorine gas can undergo substitution reactions and addition reactions with organic substances to form a variety of chlorides. It can also undergo substitution reactions and addition reactions with both organic and inorganic substances to generate multiple chlorides. In the early days, chlorine gas was used as a bleaching agent in the papermaking and textile industries.

After chlorine gas is inhaled, it reacts with the water in the mucous membranes and respiratory tract to form hydrogen chloride and nascent oxygen. Hydrogen chloride can cause inflammatory edema, congestion, and necrosis of the upper respiratory tract mucosa; nascent oxygen has a strong oxidizing effect on tissues and can form ozone, which has a cytotoxic effect on cell protoplasm. If the chlorine concentration is too high or the exposure time is too long, it often leads to deep respiratory tract lesions, damaging the bronchioles and alveoli, and causing pneumonia and toxic pulmonary edema. The irritating effect causes local smooth muscle spasm, which aggravates ventilation disorders and worsens the state of hypoxia; after inhaling high-concentration chlorine gas, it can also stimulate the vagus nerve and cause reflex cardiac arrest. It should be noted that artificial respiration must not be performed for chlorine gas poisoning.

Places that need to detect chlorine concentration are generally in the petrochemical industry where toxic gases exist, such as petroleum, natural gas, chemical engineering, and oil depots. To detect leakage in hazardous indoor and outdoor places and ensure production safety and personal health, toxic gas alarms can be used to detect chlorine concentration.

The principle of a toxic gas alarm is that when chlorine gas is present in the measured site, the detector converts the gas signal into a voltage signal or current signal and transmits it to the alarm instrument, which displays the percentage concentration value of the lower explosive limit of chlorine gas. When the chlorine gas concentration exceeds the alarm set value, an audible and visual alarm signal is triggered to prompt the on-duty personnel to take timely measures to avoid personal injury and property accidents.

The reason why toxic gas alarms can monitor chlorine content is that the alarm is equipped with a chlorine sensor. When the chlorine sensor detects that the chlorine content exceeds the set range, the alarm will issue an alarm signal, allowing the staff to make timely adjustments.

Shenzhen Sandate recommends using the chlorine sensor GS+4CL2 for CL2 content monitoring. Once the chlorine sensor detects that the chlorine content exceeds the set range, it can promptly send an alarm signal, enabling relevant staff to make timely adjustments. The GS+4CL2 sensor has high resolution, good linearity, fast response speed, and strong stability. It is suitable for handheld, portable alarm devices, and fixed alarm devices; it can be applied to gas detection projects in various places such as chemical industry, petroleum, and water plants, and is widely used for chlorine leakage detection in industrial sites.