A kind of composite biomass briquette binder and its preparation method and application

Abstract

The invention discloses a composite biomass briquette binder, which is prepared from the following raw materials in parts by weight: 1 part of sunflower straw, 10 to 20 parts of sodium hydroxide solution, 0.3 to 0.4 parts of bentonite, and 1 to 2 parts of emulsified asphalt or 1 part of sunflower straw, 10 to 20 parts of sodium hydroxide solution, 0.3 to 0.4 parts of bentonite, 0.3 to 0.4 parts of sodium humate, and 0.6 to 2.2 parts of modified starch; in addition, the invention also discloses a composite A preparation method of a biomass briquette binder and an application of the composite biomass briquette binder in preparing pyrolysis briquettes. The invention uses sunflower stalks as the main raw material, and when the prepared composite biomass briquette binder is used to prepare briquettes for pyrolysis, it can not only make the briquettes have good cold and hot strength, but also can significantly improve the thermal efficiency of the briquettes. The tar yield during solution is simple, and the preparation method is simple and environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of pulverized coal molding, and in particular relates to a composite biomass molding coal binder and a preparation method and application thereof. Background technique [0002] Coal classification and quality separation utilization technology refers to a clean coal utilization technology that pyrolyzes coal through medium and low temperature dry distillation, removes volatiles, including gas and coal tar, and reuses the remaining semi-coke. At present, the main processes used in the coal pyrolysis industry are: internal combustion and internal heating continuous vertical square furnace pyrolysis technology with high thermal efficiency and pulverized coal solid heat carrier pyrolysis technology. The former production method has mature technology, high tar yield and good quality, and uses 30mm-80mm lump coal as raw material, but affected by the coal mining mechanism, the lump coal that meets the demand only ac...

AI Technical Summary

Problems solved by technology

Inorganic binders generally have a wide range of sources, low prices, and good thermal stability, but poor cohesiveness and increased ash content; most organic binders have good cohesiveness and have a certain calorific value, but poor thermal stability and high price; choose A composite binder formed by mixing a suitable inorganic binder and an organic binder can combine the advantages of the two to produce an efficient and economical industrial briquette binder. The cold strength of briquettes prepared by the prior art is generally lower Low, and prone to the problem of low heat strength at high temperature. At present, no binder with wide sources, large quantity, and low cost, which can meet the requirements of molding process and practical strength, and meet the combustion characteristics has not yet been developed.

Images