Grouting material containing circulating fluidized bed fuel coal solid sulfur ash

Abstract

The invention discloses a grouting material containing circulating fluidized bed fuel coal solid sulfur ash. The grouting material containing the circulating fluidized bed fuel coal solid sulfur ash is characterized by comprising the following components in percentage by mass: 10 to 25 percent of solid sulfur ash, 23 to 35 percent of cement, 40 to 55 percent of sand, 0.2 to 0.8 percent of water-reducing agent, 9 to 15 percent of water, 0 to 10 percent of expanding agent and 0 to 1 percent of defoaming agent. The grouting material adopts industrial waste solid sulfur ash as an admixture, utilizes the cinerite activity and the expanding performance of the solid sulfur ash, changes waste into treasure, is low in cost, reduces environmental pollutions, and has a simple production process, low energy consumption, excellent product performance and high practicability.

Description

technical field [0001] The invention belongs to mortar containing sulfur-fixing ash and Portland cement, and relates to a grouting material containing coal-fired sulfur-fixing ash in a circulating fluidized bed. It is suitable for grouting materials mainly prepared from waste sulfur-fixed ash. Background technique [0002] Circulating fluidized bed combustion (CFBC for short) technology is an advanced clean coal combustion technology that fixes sulfur during the combustion process. It has wide adaptability to coal types, high combustion efficiency and sulfur fixation efficiency, and good load regulation performance. Low cost of sulfur fixation, etc., can effectively reduce coal-fired sulfur dioxide and NO X emissions, reduce air pollution, and benefit environmental protection, and have been vigorously developed and promoted. Circulating fluidized bed (CFB) coal-fired sulfur-fixed ash is solidified when coal is burned in a fluidized bed coal-fired boiler using circulating f...

AI Technical Summary

Problems solved by technology

In the prior art, there are very few utilization technologies of circulating fluidized bed (CFB) sulfur-fixing ash, and a large amount of sulfur-fixing ash is in a state of simple stacking and random discharge, which not only occupies a large amount of land resources, but also pollutes the atmosphere, water, soil and biological environment, and even endanger human health

If the sulfur-fixing ash is not comprehensively treated and utilized, it will definitely cause secondary pollution to the environment, and will also restrict the popularization and application of fluidized bed coal-fired sulfur-fixing technology.

[0003] Due to the large particle size and low groutability of traditional cement and clay grouting materials, it is difficult to meet the different requirements of various strata types

Traditional water glass grouting materials have low consolidation strength, and the resulting gel products have certain pollution to the environment

In the prior art, grouting materials are generally used for foundation reinforcement, emergency repair projects, repairs, etc.; the polymer chemical grout materials currently used have high construction costs and problems in terms of economy and durability, making it difficult to use them in large quantities. A certain degree of toxicity, easy to pollute the environment and endanger human health

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