Suspended fhuidized coal water slury boiler and its system
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Fuel characteristics of coal water slurry (cws)
Cws is made of about 66% coal, 33% water and about 1% chemical additives.
Technology principle of fluidized suspension highefficiency clean combustion
The cws droplets into the lower portion of the combustion chamber is made of quartz sand andlimestone constitute the hot bed material in a fluidized bed, at a temperature of about 850-950 °C. CWS inthe hot fluidized bed material is heated rapidly to complete the analysis of the water, devolatilization andignition and combustion of coke combustion process. In the fluidized state particulate CWS group furtherdisintegration into fine particles out of the hot flue gas enters dense phase suspension combustionchamber continuously. In the combustor exit with a separate transfusion devices. Coal material is hot fluegas out of coal-water slurry particles and larger groups are separated separator, capture, return to thecombustion chamber through the lower portion of the dense phase separator lower portion reinfusionchannel, reducing the loss of media materials, but also to achieve the CWS group cycle combustion par-ticles, thereby obtaining a high combustion efficiency. In addition, the low temperature combustionprocess, effective control of the formation of thermal NOX type. And because coal material composed ofquartz sand and limestone structure, limestone calcination at a high temperature to generate CaO, CaOSO2 react with further generate CaSO4, suppresses the S02 emissions, combustion device operating tem-perature is the optimum operating temperature CaO desulfurization can effectively reduce SO2 emissions.
