A kind of modified asparagus coal water slurry additive and preparation method thereof

Abstract

The invention provides a modified asparagus coal-water slurry additive and a preparation method thereof, the steps of which are as follows: (1) After the asparagus is crushed into powder, water is added and mixed thoroughly, stirred evenly, and the asparagus is radiated under a microwave radiation power of 250-550W Gelatinize for 3 to 8 minutes, cool to room temperature; (2) add the gelatinized asparagus into the reaction kettle, then add unsaturated sulfonate and polyethylene polyamine into the reaction kettle, start stirring and heat up, After the temperature is raised to 85-110°C, the initiator solution with a mass percentage concentration of 1-10% is added dropwise. This initiator solution is prepared from the initiator and part of the water; the dropping time is controlled at 3-5 The temperature is controlled at 90-100° C. during the dropwise addition; (3) after the dropwise addition, the temperature is kept to continue the reaction for 1-4 hours, the temperature is lowered and the material is discharged to obtain the coal-water slurry additive.

Description

technical field [0001] The invention belongs to the field of fine chemicals, in particular to a modified asparagus coal-water slurry additive and a preparation method thereof. Background technique [0002] The main problem that restricts the popularization of coal water slurry technology at present. The first is the special demand for coal types. There are corresponding restrictions on the types of coal suitable for pulping operations, mainly medium and high-grade metamorphic coal. With the further expansion of this technology, the demand for coal resources increases, and the medium and high-rank coals are also facing increasing pressure as the main pulping coals. Low-rank coal in my country's coal resources has the advantages of abundant reserves and low prices. The western region of my country is mainly low-rank coal, namely "three low" and "two high". The former represents low sulfur, ash and phosphorus; The latter represents high volatile content and calorific value, bu...

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Problems solved by technology

Low-rank coal in my country's coal resources has the advantages of abundant reserves and low prices. The western region of my country is mainly low-rank coal, namely "three low" and "two high". The former represents low sulfur, ash and phosphorus; The latter represents high volatile content and calorific value, but this coal type has disadvantages such as low slurry concentration and poor slurry performance, which provides technical difficulties for pulping, and technical breakthroughs are awaited, with great development potential

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