Waste heat utilization method in wet production process of sodium silicate for quick-setting cement

Abstract

The invention provides a waste heat utilization method in a wet production process of sodium silicate for quick-setting cement. The method comprises the following steps: conveying sodium hydroxide to a material mixing tank through a metering system, conveying solid quartz sand to the material mixing tank through a belt conveyor, overdosing the quartz sand by 30 percent in a mixing process, heating the quartz sand by steam to the temperature of 65 DEG C, and performing stirring mixing in the material mixing tank to obtain slurry; conveying the mixed slurry to a reaction kettle through a sand pump, heating the slurry by using steam of which the pressure is 0.65Mpa, performing a reaction at the temperature of 165 DEG C, after the reaction is performed for 7h, relieving the pressure of the reaction kettle to 0.3Mpa, quickly settling a material in the reaction kettle by the auto-rotation of the reaction kettle around a central shaft thereof serving as the center, performing standing and natural settling for 1.5h after the reaction kettle auto-rotates for 2h to separate the sodium silicate from a suspended solid, conveying the sodium silicate into a finished product tank through a pump, and discharging a settlement object settled in the reaction kettle to a re-mixing system. According to the waste heat utilization method in the wet production process of the sodium silicate for the quick-setting cement, waste gas is recycled; the settlement time is shortened, and energy consumption can be reduced by 25 percent; the production efficiency is improved; solid waste is recycled by utilizing the re-mixing system, and the utilization rate of raw materials is high.

Description

technical field [0001] The invention relates to the technical field of sodium bicarbonate production, in particular to a method for utilizing waste heat in a wet production process of sodium bicarbonate for quick-drying cement. Background technique [0002] The production process of Sodium Sodium can be divided into two types: dry method and wet method. Usually, the dry method is used to produce solid Sodium Sodium, and then it is transformed into liquid Sodium Sodium by dissolution. The conversion ratio is 1:2.5 . The raw materials for the production of sodium silicate are quartz sand and soda ash. The two are mixed in a certain proportion and sent to the reverberatory kiln. After being calcined and quenched by water in the melting furnace, the solid sodium silicate is packaged. Solid natron is good for transportation and storage. Dissolving the solid sodium hydroxide into liquid at a certain temperature and pressure is the liquid sodium hydroxide. [0003] The tradition...

AI Technical Summary

Problems solved by technology

[0003] The traditional wet-process sodium hydroxide production process consumes a lot of energy, requires high investment, is complicated to operate, and requires relatively high skill requirements for personnel.