Combustion Characteristics of Plant Chemical Polyol Waste Liquor in a Pilot Water-Cooled Incinerator

Dawei Wang, Guangbo Zhao, Chuanming Du, Dongdong Feng and Lin Wang
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Dawei Wang: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Guangbo Zhao: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Chuanming Du: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Dongdong Feng: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Lin Wang: WuHan Boiler Energy Engineering CO., LTD, No.1 Jiangxia Avenue, Miaoshan Development District, Wuhan 430200, China

Energies, 2019, vol. 12, issue 22, 1-18

Abstract: In the production of plant chemical alcohol, a large amount of salty high-concentration organic waste liquid is by-produced, in which a large amount of high-value sodium tungstate and chemical heat energy are contained. Through the design of the pilot water-cooled incinerator, the operating parameters and the characteristics of alkali ash deposition of the waste incinerator were tested. The pilot incinerator is a natural-cycle steam boiler, has a full water-cooled II-type structure, with liquid slag discharge, and the furnace design has selected reasonable volumetric heat load and flue gas residence time. Combustion distribution is the core parameter affecting the combustion of waste liquid. Studies have shown that increasing the primary air rate and the excess air coefficient are beneficial to improve the combustion performance of waste liquid, increase steam production, and reduce CO and SO 2 emissions in flue gas, but also increase the concentration of NO. When the excess air ratio was 1.2, and the primary air ratio was 0.65, the NO concentration in the tail flue gas was less than 10 ppm, and the SO 2 concentration was zero. The TG-DTA method measured that when the alkali ash melting temperature was less than 587 °C, the alkali ash had strong adhesion in the high temperature zone of the incinerator and less deposition in the low temperature region of the tail. The alkali ash deposition rate and relative deposition rate were used to quantitatively study the characteristic of alkali ash deposition.

Keywords: Plant Chemical Polyol; Waste Liquor; Incinerator; Combustion; Deposit (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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