Transformation water gas waste heat boiler clogging treatment modification
The main work of the transformation and heat recovery section is to transform the 210 ℃,3.78 MPa(G)water gas delivered from the gasification section,with a water to gas ratio of about 1.4,and then undergo partial water gas shift reaction,so that the hydrogen to carbon ratio of the shifted gas from the section reaches 1.4 to 1.9,and then send it to the low-temperature methanol washing section of purification workshop.At the same time,by-product steam of 4.0 MPa(G),1.0 MPa(G),and 0.6 MPa(G)is produced.The by-product steam is recovered through the superheater and sent to the corresponding steam pipeline system of the whole plant.Due to the gasification section with more ash and no effective separation and filtration measures before entering the transformation water gas waste heat boiler,resulting in frequent clogging of the water gas waste heat boiler tubes,frequent blockage of the water gas waste heat boiler tubes has led to multiple forced shutdowns for physical cleaning.The water gas pipeline from gasification unit to transformation and heat recovery unit is modified to remove the ash,and a high-efficiency filter is added before entering the water gas waste heat boiler,which reduces the amount of ash in the water gas waste heat boiler,improves the operation cycle of the system,and ensures the safe and smooth operation of the system.
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