Dispersing agent injection system for methanol-to-olefin device

The dispersing agent injection system comprises a dispersing agent tank and a dispersing agent conveying pipeline, one end of the dispersing agent conveying pipeline is connected with the dispersing agent tank, and the other end of the dispersing agent conveying pipeline is connected with an eighth-layer tray washing water conveying pipeline in the middle of a water scrubber and a first-layer tray washing water conveying pipeline on the upper portion of the water scrubber respectively. According to the dispersing agent injection system, the dispersing agent can be stably injected into the water scrubbing tower for a long time, the trend of tower pressure rising is effectively inhibited, and long-period stable production of a DMTO device is guaranteed. 本实用新型公开了一种甲醇制烯烃装置用分散剂注入系统，包括分散剂罐和分散剂输送管路，分散剂输送管路一端与分散剂罐连接，另一端分别连接水洗塔中部第8层塔盘水洗水输送管路和水洗塔上部第1层塔盘水洗水输送管路。本分散剂注入系统能够使得分散剂长期、稳定注入到水洗塔中，有效抑制了塔压上升的趋势，保证DMTO装置长周期平稳生产。