In the whole process of treating VOCs by catalytic combustion method, several kinds of safety risks are given: activated carbon ignition in activated carbon filtration adsorption catalytic combustion method, explosion of catalytic reaction furnace, and explosion of all catalytic combustion treatment equipment.
1. Ignition status and preventive measures of activated carbon in the whole process of early VOCs containing, the adsorption temperature is too high due to the low ignition point of activated carbon. When adsorption treatment is carried out on the saturated activated carbon, the activated carbon will catch fire due to the high temperature of the adsorption box. To solve this problem, we can start from two aspects: one is to select activated carbon with high ignition point; the other is to strictly control the adsorption temperature to make it far lower than the ignition point of activated carbon. Therefore, the following countermeasures can be taken: strictly control the adsorption temperature, select the adsorption temperature sensor with high cost performance, try to install two temperature sensors in the suitable part of the activated carbon filter box; add the adsorption temperature in the "PLC" programming, and terminate the adsorption process when the adsorption temperature is too hot; take precautions together, lift the fire safety water pipe above the activated carbon filter box and connect the smoke alarm Alarm and automatic spraying equipment to prevent accidental fire.
2. Problems and preventive measures of explosion in catalytic reaction furnace when dealing with high concentration VOCs, because there is a lot of CO2 in the furnace, when the concentration of organic waste gas exceeds the explosion limit of most industrial waste gas in organic waste gas, there will be the risk of explosion. Therefore, it is necessary to detect the concentration of VOCs in the furnace at all times, and install the concentration diluent equipment beside the waste gas pipe into the catalytic reaction furnace, so as to reduce the high concentration organic waste gas diluent to the explosion limit. ? raise the working pressure of the automatic exhaust valve on the catalytic reaction furnace together, and open the gate valve automatically when the working pressure is too high to release the pressure exhaust pipe, so as to prevent the explosion caused by too high temperature and working pressure in the furnace (the fire gas pressure in the furnace is too high due to the rapid release of a lot of energy in the whole process of thermal oxidation).
3. Fire and explosion of all catalytic combustion treatment equipment and preventive measures the fire and explosion of all catalytic combustion treatment equipment mostly occurred in the system software of only one set of adsorption equipment. Due to the accumulation of a lot of high concentration industrial waste gas fine particles in the pipeline wall and mechanical equipment, the gap between the electric air valves in the pipeline was too large, and the production and manufacturing were not terminated in the whole process of adsorption catalytic combustion,? The by-pass valve of the production workshop can not be closed, and all pipelines are fully connected. At this time, the adsorption catalytic combustion pole will cause all system software to catch fire and explode under the high temperature effect. ? for the above situation, the countermeasures should be given: installing high-quality electric air valve, often checking the steam leakage condition, stopping work in the whole process of adsorption catalytic combustion in a single set of adsorption equipment system software, etc.