Direct-combustion tail gas treatment method and system

Abstract

The invention relates to the technical field of waste gas treatment, in particular to a direct-combustion tail gas treatment method and system. The method comprises the following steps that combustible tail gas is fed into a long open fire combustion area to generate primary treatment gas; cooling treatment is carried out on the primary treatment gas; and activated carbon adsorption treatment is carried out on cooled primary treatment gas to generate secondary treatment gas. The system comprises a direct-combustion cover, a cooler and an activated carbon adsorption box along a moving path of combustible tail gas; a gas inlet of the direct-combustion cover is provided with a waste gas direct-combustion assembly, and one side of the direct-combustion cover is provided with a gas inlet pipe through which the combustible tail gas enters the waste gas direct-combustion assembly; and the cooler respectively communicates with the direct-combustion cover and the activated carbon adsorption box through pipelines. The direct-combustion tail gas treatment method and system have the effects that the existing tail gas treatment cost is reduced, the tail gas treatment efficiency is improved, and the tail gas treatment safety is improved.

Description

technical field [0001] The present application relates to the technical field of waste gas treatment, in particular to a method and system for direct combustion tail gas treatment. Background technique [0002] Lost Foam Casting is a new technology with nearly no allowance and precise molding. This technology does not need to take molds, has no parting surface, and no sand core, so the casting has no flash, burr, and draft angle, and reduces the risk of damage caused by the core. The dimensional error caused by the combination has developed rapidly in the world in recent years. [0003] The lost foam casting is first made into a foam plastic model according to the EPC process, coated with a special paint, and after drying, the foam plastic model is placed in a special sand box, filled with dry sand, compacted by three-dimensional vibration, and cast in a vacuum state. The model gasifies and disappears, the metal replaces the foam plastic model, and the same casting as the f...

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Problems solved by technology

[0003] The lost foam casting is first made into a foam plastic model according to the EPC process, coated with a special paint, and after drying, the foam plastic model is placed in a special sand box, filled with dry sand, compacted by three-dimensional vibration, and cast in a vacuum state. The model gasifies and disappears, the metal replaces the foam plastic model, and the same casting as the foam plastic model is reproduced. After the metal condenses, the vacuum is released, and the casting is taken out from the loose sand for the next cycle. During the casting process, the vacuum is continuously drawn out. Combustible tail gas is generally treated by photooxygen, low-temperature plasma, catalytic combustion, activated carbon adsorption or RTO. When the flammable tail gas is at a high concentration, it is easy to explode when the flammable tail gas is treated by photooxygen and low-temperature plasma. The use of activated carbon adsorption will easily lead to the saturation of activated carbon adsorption when the concentration is high, while the use of RTO treatment requires continuous operation during the casting process and high operating costs, so a safe and low-cost tail gas treatment method is urgently needed

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