Title: Research on the preparation of coal water slurry with high chloride and concentrated brine

Authors: Chang-Ji Wang; Han-Xu Li

Addresses: School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China ' School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China

Abstract: In this paper, we focused on the simulation of high-salinity wastewater to determine the effects of Cl^- on the performance of coal water slurry. We found a feasible method for brine pulping and acquired an effective way to use the acquired brine. In this paper, NaCl and anhydrous CaCl₂ were mixed with deionised water and used to configure the brine. The effects of the simulated brine with a different concentration on the slurry properties of the sample were investigated. The feasibility of the preparation of the coal water slurry for coal gasification with high-concentration brine was demonstrated by comparing the data with the actual high concentration brine. The experiment showed that highly concentrated salt water was used to replace the pulping water; the slurry concentration, the viscosity, the melting characteristic, and the stability, and the industrial pulping requirements were achieved. This technology had an increasing application and popularisation. [Received: April 20, 2020; Accepted: January 20, 2021]

Keywords: high-salinity wastewater; slurrying.

DOI: 10.1504/IJOGCT.2022.125053

International Journal of Oil, Gas and Coal Technology, 2022 Vol.31 No.1, pp.79 - 103

Received: 20 Apr 2020
Accepted: 20 Jan 2021
Published online: 24 Aug 2022 *

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