Tail gas treatment device and method for polyolefin blending silo

Abstract

The invention provides a tail gas treatment device and method for a polyolefin blending silo. A polyolefin refining device is provided with a plurality of the blending silos, a degassing fan is connected with the bottom of each blending silo, an exhaust pipe is connected with the tops of the blending silos and connected with a combustion-supporting pipe through a bag filter, and the combustion-supporting pipe is connected with a heating furnace. When the device in use, air is introduced into the bottoms of the blending silos through the degassing fans, VOC in the blending silos is removed, theVOC-containing removed gas is collected through the exhaust pipe at the tops of the blending silos and fed into the bag filter to remove dust from the removed gas, and the removed gas is then fed into the heating furnace through the combustion-supporting pipe to serve as combustion-supporting air, so that VOC is burnt out in the heating furnace. Standard emission of VOC can be realized by only adding the degassing fans, the bag filter and the necessary pipes, and the operation cost is not greatly increased, so that the tail gas treatment device and method have high economic value and social value.

Description

technical field [0001] The invention relates to a tail gas treatment device and method of a polyolefin blending silo. Background technique [0002] In the polyolefin plant of petrochemical enterprises, when producing some brands of products, the main component of the exhaust gas from the blending silo is air, which contains acetone, ethane, methane, and other volatile organic compounds (VOC for short). If the VOC concentration is higher than the environmental protection requirements, the exhaust gas needs to be treated. [0003] There are two existing exhaust gas treatment methods. [0004] One of the methods is to pass air into the tail gas discharge pipeline of the blending silo through a dilution fan to dilute the VOC concentration in the tail gas so that the concentration meets the environmental protection emission requirements. [0005] The second method is to use the regenerative thermal incinerator (RTO) to incinerate the tail gas and discharge it up to the standard...

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned first method only reduces the concentration of VOC through dilution by the dilution fan, but does not reduce the total amount of VOC emissions; if the total amount of VOC exceeds the standard, it is still impossible to achieve the standard emission

[0007] In the second method above, the investment in regenerative thermal incinerator (RTO) is relatively high, fuel gas needs to be consumed, and equipment investment and operating costs are very high.

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