Nitrogen fire-fighting system for activated carbon desorption

Abstract

The invention belongs to the technical field of air pollution control, and particularly relates to a nitrogen fire-fighting system for activated carbon desorption. The system comprises an air compression purification system for providing compressed air, a compressed air storage system for storing the compressed air, a nitrogen-oxygen separation system for providing nitrogen, a nitrogen storage system for achieving nitrogen buffering, an electromagnetic valve for controlling the unblocked or blocked state of a nitrogen pipeline, a generator activated carbon box for burning activated carbon, a thermal resistor for detecting the temperature of the activated carbon, and an air valve for controlling the moving or stagnant state of gas. When the thermal resistor in the nitrogen fire-fighting system detects that the temperature of the activated carbon in the activated carbon box is higher than the desorption temperature set by the system and the activated carbon in a box body is smoldered orignited, the air valve on the pipeline is switched on, and it is ensured that nitrogen moves into the activated carbon box. A large amount of nitrogen continuously moves into the box body, oxygen in the box body can be rapidly expelled out of the box body and emptied, the combustion reaction is terminated, and the fire-fighting function is achieved.

Description

technical field [0001] The invention belongs to the technical field of air pollution prevention and control, and in particular relates to a nitrogen fire-fighting system for activated carbon analysis. Background technique [0002] Activated carbon adsorption and concentration technology is a VOCs waste gas treatment technology that is more suitable for large air volume and low concentration among many waste gas treatment technologies. It has the advantages of wide application, convenient maintenance, and the ability to treat a variety of mixed exhaust gases at the same time. In addition, activated carbon can be regenerated and reused, so the activated carbon adsorption and concentration technology also has the advantages of low cost and simple operation. [0003] Activated carbon adsorption and concentration technology has become the mainstream technology for large air volume and low concentration VOCs waste gas treatment in the past ten years. However, after years of opera...

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Problems solved by technology

[0003] Activated carbon adsorption and concentration technology has become the mainstream technology for large air volume and low concentration VOCs waste gas treatment in the past ten years. However, after years of operation practice, this technology has some defects: activated carbon is used as the adsorbent, and the theoretical temperature of activated carbon during desorption and regeneration It should be around 90°C. In actual engineering operation, the desorption temperature fluctuates due to changes in the intake concentration of VOCs exhaust gas or switching of valves in the system. fire, a safety accident will occur

[0004] In view of the flammability of activated carbon, the commonly used fire extinguishing method is to use fire-fighting water sprinkler system. For non-waterproof honeycomb activated carbon, if it encounters water, it will be loose and crushed directly, so the activated carbon that uses fire-fighting water spray system must use waterproof activated carbon. Waterproof honeycomb activated carbon is specially added with water-resistant components in the production process, and undergoes water-resistant treatment and secondary firing. It has the characteristics of high strength, water resistance, strong acid resistance and strong alkali resistance. This characteristic determines the price of waterproof activated carbon. Not conducive to controlling project costs

Another disadvantage of the fire sprinkler is that the position of the nozzle is fixed and cannot be moved, and the spray radiation area is limited. For the fire point, the nearby nozzle needs to spray continuously for a long time to extinguish the fire, and the fire cannot be extinguished quickly in a short time

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