Sensitivity and safety boundary Analysis of Opposed Multi‐Burner Coal Water Slurry Gasification System

Zhang, Shuhang; Dai, Zhenghua; Xu, Jianliang; Liu, Haifeng; Wang, Fuchen

doi:10.1002/er.4962

Cited by 4 publications

(1 citation statement)

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“…3 This technology has had been fully verified by industry practice and demonstrated obvious advantages in many aspects such as stability, process indexes, and carbon conversion. 4 In the gasifier, coal particles undergo rapid pyrolysis, combustion, and gasification process, meanwhile, generated syngas and liquid slag which, respectively, translated from the organic materials and inorganic minerals in the coal. Commonly, part of the liquid slag will solidify on the inner walls of the combustion chamber to form a solid slag layer, thereby protecting the refractory walls from damage and corrosion.…”

Section: Introductionmentioning

confidence: 99%

Understanding the slag transformation behaviors during entrained‐flow gasification based on comparative analysis of slag properties

Wang

Bao

et al. 2021

Asia-Pacific J Chem Eng

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In this work, four slag samples were collected from the OMB CWS gasification, and the mineral behavior and morphology were studied to explore the formation mechanism of blockage slag. Results showed that amorphous phase is dominant in all slag samples, which was mainly glassy substances rich in low-temperature eutectic of iron. The precipitation of metallic iron and the crystals of SiC, calcite, and quartz were found in slags which were taken from the bottom of the combustion chamber (S-b). The quench slag collected from stable operation conditions (S-s) had a low content of quartz crystalline. While slag from the down pipe of the quench chamber (S-b) and bulk slag from the water-cooled pool (S-p) had observed the precipitation of crystals. Comparing to S-s, carbon matters in S-b had a higher order degree of carbon structure. By comparing the slag sample obtained during stable operation (S-s) with slag blocking occurs (S-b, S-d, S-p), it is found that the blockage of the OMB CWS gasifier was strongly related to unreacted residual carbon and the high content of sodium and iron in coal. They will interact with each other and form small number of crystals and most of the amorphous material.

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Section: Introductionmentioning

confidence: 99%