Conceptual design of a modified phenol and ammonia recovery process for the treatment of coal gasification wastewater

Abstract This paper proposes an improved process for phenol and ammonia recovery, which mainly utilizes low-pressure steam (LPS) for treating industrial coal-gasification wastewater. A conceptual design of the proposed process is suggested based on simulation results. To improve the accuracy of the simulation, binary interaction parameters between ammonia and phenol are regressed. It is expected that the performance of the new process is better, where the concentrations of phenol, total phenols and COD can be reduced to approximately 15 mg/L, 240 mg/L and 240 mg/L, respectively. Upon implementation of the new process, the total consumption of steam is lower, and most of the medium-pressure steam (MPS) can be replaced by LPS. Therefore, the financial investments by the factory will be greatly reduced, causing a significant increase in profits.

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