Coal gasification grey water dispersing agent and application thereof

Abstract

The invention relates to a coal gasification grey water dispersing agent which comprises a grey water dispersing agent compound of quaternary ammonium salt and block polyether. The compound is compounded by dissolving 10-90% by weight of quaternary ammonium salt and 10-90% by weight of block polyether in deionized water. According to the coal gasification grey water dispersing agent, the quaternary ammonium salt and the block polyether are adopted and dissolved in the deionized water according to a certain proportion to be compounded, and the quaternary ammonium salt and the block polyether can form an adsorption layer on the surfaces of ash content suspended solids and colloidal particles, so that hard scale formed by growth and precipitation of dirt in water can be effectively prevented; meanwhile, the good permeability of the block polyether is utilized, the quaternary ammonium salt is facilitated to permeate into scale forming particles, and dirt in the coal gasification grey water is soft and easy to clean by utilizing the compound synergistic effect of the dispersing, solubilizing, permeating and scale inhibiting functions of the block polyether and the quaternary ammonium salt, so that the dispersing and scale inhibiting functions of the grey water dispersing agent are greatly enhanced; the adding concentration of the grey water dispersing agent can be reduced, so that the coal gasification grey water treatment cost is reduced.

Description

technical field [0001] The invention belongs to the field of coal chemical water treatment, and in particular relates to a coal chemical gray water dispersant. Background technique [0002] Coal gasification gray water has the characteristics of high temperature, high pressure, high turbidity, high hardness, high alkalinity, etc., so during its cycle operation, it is easy to produce deposition, scaling and other adverse phenomena, which seriously affects the normal and stable operation of coal gasification equipment . In order to effectively slow down the impact of gray water scaling on production equipment, reduce sewage discharge, and increase the reuse rate of gray water, the chemical treatment method of adding gray water dispersants is widely used in the coal gasification gray water treatment process. [0003] At present, gray water dispersants with anionic surface active components are widely used in the field of coal gasification gray water treatment process. The eff...

AI Technical Summary

Problems solved by technology

The concentration of these gray water dispersants in coal gasification ash water is required to be high, so that the dispersion and scale inhibition performance of coal gasification ash water can achieve the ideal effect. If the dosage is low, the required dispersion and scale inhibition performance cannot be achieved. , resulting in higher cost of use

Images