Coke cleaning and coal saving additive for power plant pulverized coal boiler and preparation method thereof

Abstract

The invention provides a decoking and energy saving additive for pulverized coal boilers in power plants. The additive is prepared from the following raw materials by mass percent: 16-45% of aluminium oxide, 10-25% of calcium carbonate, 8-22% of copper oxide, 5-16% of chromic anhydride, 3-15% of dolomite, 3-10% of zinc nitrate, 8-25% of vermiculite, 2-10% of graphite, 2-15% of bentonite and 3-18% of kaolin. The invention also provides a method for preparing the additive. The method is characterized by grinding all the raw materials into powder with grain size of 100-150 meshes, mixing the powder and then adding the mixture to a stirrer to be stirred uniformly, thus obtaining the decoking and energy saving additive for pulverized coal boilers in power plants. Without the components such as chlorine, sulfur, potassium, sodium and the like, the additive can effectively prevent corrosion of equipment, and the additive is small in additive amount, has prominent decoking and energy saving effects and has very obvious economic benefits.

Description

technical field [0001] The invention belongs to the technical field of coal industry, and relates to a coke-cleaning and coal-saving additive for pulverized coal boilers in power plants and a preparation method thereof. Background technique [0002] my country's current energy production and consumption is still dominated by coal, which accounts for about 70% of my country's energy consumption. Power plants are undoubtedly the largest consumers of coal, and coal combustion is the main source of polluting gases such as sulfur dioxide and nitrogen oxides. Energy conservation and emission reduction is a basic state policy of the country. Building a resource-saving and environment-friendly society and carrying out technological innovations for energy conservation and emission reduction are research hotspots and difficulties for technicians in this field. [0003] The coal-fired boiler of a power plant is a kind of thermal power equipment that uses the heat released by coal comb...

AI Technical Summary

Problems solved by technology

In the process of coal combustion, due to the large ash content of coal and low calorific value, coal-fired boilers have different degrees of coking. The coking of the water-cooled wall in the furnace will affect the slagging function of the boiler. In severe cases, the water-cooled wall is covered by coke. The thickness of the coke body can reach several tens of centimeters, which seriously affects the thermal efficiency of the boiler. Coking may even cause the nozzle of the burner to be blocked.

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