2026-05-26Views：
The role of compressed air in chlor-alkali chemical plants
chlor-alkali chemical plant is through the electrolysis of salt water to produce chlorine, hydrogen and caustic soda factory, the use of compressed air throughout the production process is very much, can be said to be a source of power plant operation can not be separated.
Driving all kinds of pneumatic equipment is the most important use of compressed air. There are a large number of pneumatic valves, pneumatic pumps, and pneumatic agitators in the chlor-alkali plant, all of which rely on compressed air to drive the action. For example, valves that control the flow of brine, valves that control the delivery of chlorine and hydrogen, all require compressed air to drive, in order to achieve accurate switching and regulation. The instrument control system on the production line also relies on compressed air to transmit signals, allowing operators to grasp the key parameters of temperature, liquid level and pressure in real time.
Providing oxygen for chemical reactions is also an important use. There are many links in the chlor-alkali plant that need to be burned and heated, and the oxygen in the compressed air is the most convenient combustion improver. In addition, in some oxidation reactions, the oxygen in the compressed air is itself the raw material required for the reaction.
Pneumatic conveying and material handling are also inseparable from compressed air. There are many powdery and granular raw materials in chlor-alkali plants, such as salt and lime, which can be sent from one place to another through pipes with compressed air, which is clean and free of residue.
Compressed air is also required for cleaning and purging. Equipment and pipelines will have scaling and residue after a long time, which can be cleaned with compressed air. Before driving, use compressed air to blow away the impurities in the pipeline to ensure that the system is clean.
Compressed air is also used in sewage treatment. Wastewater from chlor-alkali plants needs biochemical treatment. Compressed air is released into the sewage through small holes at the bottom to provide oxygen to microorganisms, allowing them to better decompose harmful substances in the wastewater.
The filter bag in the exhaust gas treatment device needs to be cleaned regularly, and the compressed air will be blown back regularly to shake off the dust attached to the filter bag to ensure that the exhaust gas can be discharged smoothly.
In these applications, there is a particularly critical issue, that is, the cleanliness of the compressed air. In some links in chlor-alkali plants, compressed air will directly contact the product or participate in the process. If the air carries oil, the oil may pollute the product, and even have adverse reactions with chlorine and other dangerous substances, bringing potential safety hazards.
The water-lubricated air compressor can work well in the air supply system of a chlor-alkali plant. This air compressor does not use lubricating oil, but uses water to complete lubrication and sealing, so there is no oil mist in the air produced. Water forms a layer of water film inside the machine, separating the moving parts, which not only reduces friction and wear, but also takes away the heat generated during compression. Although the air will bring some moisture, but as long as the back with drying equipment to remove the moisture, you can get very pure compressed air.
In the whole air supply scheme, the water lubricated air compressor is generally used together with drying equipment and filtering equipment, and is adjusted according to the needs of different air consumption links, so that the links directly involved in the process can use higher quality air, and the air can be used for purging and cleaning such links, which not only ensures production safety and product quality, but also does not cause energy waste.
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