Fluidized bed sludge incinerator and incineration treatment method

Abstract

The present invention provides a fluidized bed incinerator 100 including an incinerator main body 1 to which a sludge is supplied, a combustion air supply device 30 which supplies a combustion air to a sand layer S provided at a lower portion of the incinerator main body 1, an N2O concentration sensor 17 which measures a N2O concentration of a combustion gas discharged from the incinerator main body 1, and a fluidized area control section which controls a fluidized area of the sand layer S based on a detected value of the N2O concentration sensor 17.

Description

technical field [0001] The invention relates to a fluidized bed sludge incinerator for burning sludge and an incineration treatment method. [0002] This application claims priority from Japanese Patent Application No. 2015-017864 for which it applied on January 30, 2015, and uses the content in this invention. Background technique [0003] Nitrous oxide (hereinafter N) is known as a global warming gas 2 O) Since it has not been listed as an object of exhaust gas regulation so far, the measurement of the emission concentration and the emission concentration based on the exhaust N 2 Combustion control of O concentration. However, it is known that N 2 O produces CO 2 The warming effect is about 300 times of that, and the sewage sludge is rich in nitrogen. Therefore, due to the high content of several hundred ppm of N in the combustion exhaust 2 O, so it is desirable to minimize the N exhausted from the sewage sludge burner 2 O. [0004] Patent Document 1 describes a te...

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Problems solved by technology

[0007] However, if the primary air ratio is reduced to less than 0.9, there will be fundamental problems such as a reduction in the amount of combustion in the sand layer, causing the temperature of the sand layer to fail to maintain a specified value, causing poor flow of the sand layer, and reducing combustion efficiency.

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