A purification system and purification method for volatile organic compound gas in a municipal sewage treatment plant

Abstract

A purification system and purification method for volatile organic gas in a municipal sewage treatment plant of the present invention, the first-stage purification treatment is carried out by a double-slot regenerative combustion furnace, and the second-stage purification treatment is matched with a rotary enrichment process device, rotary ring type concentration device, fluidized bed concentration device or fixed bed concentration device and other adsorption and desorption concentration devices, the first concentration detection device installed in the exhaust gas pipeline, the second concentration detection device installed in the pure gas pipeline The concentration detection device and the third concentration detection device installed in the discharge pipe detect the concentration of volatile organic compounds before and after purification, and control the first control valve installed in the pure gas pipeline and the second control valve installed in the gas guide pipeline. The proportional opening of the valve to ensure that the purified gas discharged from the double-slot regenerative combustion furnace or the absorption-desorption concentration device meets the emission standards. This system does not need to use complex processing equipment to ensure that the final discharged gas meets the regulations and is efficient. Energy-saving effect.

Description

technical field [0001] The invention relates to a repurification device and method for volatile organic gas, in particular to a purification system and a purification method for volatile organic gas in a municipal sewage treatment plant. Background technique [0002] Urban domestic sewage mainly comes from households, businesses and urban public facilities, etc. Organic matter is the main pollutant of domestic sewage, such as: starch, protein, sugar and vegetable oil, etc. The chemical oxygen demand, biological oxygen demand, total Nitrogen and total phosphorus are relatively high. When water with high nitrogen and phosphorus content is discharged into the natural world, it will easily cause eutrophication of the water body, causing algae to grow and reproduce in large numbers, and in severe cases, it will cause red tides and algal blooms, which will deteriorate the water quality and pollute the environment. The main pollutants in urban domestic sewage are organic matter. ...

AI Technical Summary

Problems solved by technology

[0005] In summary, the existing technology has the following problems: the removal rate of nitrogen and phosphorus is not high, the floor area is large, and the power consumption is high

The removal process of nitrogen and phosphorus is complicated, and generally involves microbial nitrification, denitrification, phosphorus release and phosphorus absorption, etc.

The removal rate of nitrogen and phosphorus in the traditional activated sludge method is very low, so the traditional activated sludge method has been improved, and the denitrification capacity can be improved by prolonging the aeration time and reducing the load operation, but it will inevitably increase the area occupied , power consumption and operating costs, due to the limitation of biomass in the activated sludge process and the characteristics of phosphorus accumulating bacteria, the phosphorus removal effect is not obvious; the main disadvantage of biological contact oxidation treatment technology is: limited by design parameters and process layout, If the design and operation are improper, the packing may be blocked. In addition, the water distribution and aeration are not easy to be uniform, and there may be dead spots in some parts. This method is currently only used in industrial wastewater or small-scale domestic wastewater.

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