Emission control method of PM2.5 of fuel coal

An emission control and coal-fired technology, applied in the field of coal-fired flue gas treatment, can solve the problems of boiler superheater or reheater burst pipes, and the unsatisfactory dust removal effect of pulverized coal combustion. The effect of investment and operating costs

Inactive Publication Date: 2013-02-13
HENAN UNIV OF SCI & TECH
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Problems solved by technology

[0007] In order to solve the phenomenon of high-temperature corrosion generated in the combustion process of pulverized coal in the prior art, which causes boiler superheater or reheater to burst, and the dust removal effect of pulverized coal combustion is not ideal, the present invention provides a coal-fired PM2.5 Emission control method, which can effectively control the emission of coal-fired ultrafine particles, especially PM2.5 particles, reduce environmental pollution, reduce harm to human health, and improve the removal of coal-fired ultrafine particles by traditional dust removal devices removal efficiency

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  • Emission control method of PM2.5 of fuel coal
  • Emission control method of PM2.5 of fuel coal

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[0026] A method for controlling the emission of coal-fired PM2.5 of the present invention, the steps are:

[0027] Step 1. Grinding the Sn-based removal agent into a particle size of 54-105 The particles of the Sn-based scavenger are mixed with the coal, the addition of the Sn-based scavenger is 3-6wt% of the amount of coal burned, and the Sn-based scavenger is SnO 2 , Sn(OH) 2 or SnCO 3 , or SnO 2 , Sn(OH) 2 or SnCO 3 A mixture of any two or three of them, the amount of Sn-based removal agent added is adjusted according to the concentration of fly ash in the flue gas after the dust collector.

[0028] Step 2: send the coal to the coal mill for grinding, send the ground coal into the boiler furnace, and send the Sn-based removal agent into the boiler furnace along with the secondary air from the secondary air port of the boiler Combustion, the air required for combustion is sent into the boiler furnace by the blower;

[0029] Step 3: After combustion, the flue gas mixe...

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Abstract

The invention relates to an emission control method of PM2.5 of fuel coal. The emission control method comprises the following steps of: grinding an Sn-based removing agent into particles with the particle diameter of 54-105 mu m, and mixing the Sn-based removing agent with the fuel coal, wherein the addition amount of the Sn-based removing agent is 3-6 wt% that of the fuel coal; and the Sn-based removing agent is a mixture of SnO2, Sn(OH)2 or SnCO3 or SnO2, Sn(OH)2 or SnCO3; feeding the fuel coal into a coal mill, feeding the fuel coal into the hearth of the boiler after grinding, feeding the Sn-based removing agent into the hearth of the boiler from a secondary air hole of the boiler along secondary air to be burned, and feeding air required for combustion into the hearth of the boiler by an air feeder; discharging smoke mixed with the Sn-based removing agent after combustion after filtering by entering a dust remover. The method disclosed by the invention is capable of effectively reducing high-temperature corrosion of an over-heater or a reheater of the boiler by alkali metal sodium and potassium; and harmful heavy metal elements in smoke can also be removed while PM2.5 is removed.

Description

technical field [0001] The invention relates to coal-fired flue gas treatment technology, belongs to the technical field of environmental pollution prevention and clean coal combustion, and specifically relates to a coal-fired PM2.5 emission control method. Background technique [0002] Pulverized coal combustion provides us with the necessary heat and power resources, but at the same time, it also produces serious environmental pollution. Although power plants have installed high-efficiency dust removal equipment, they have a high collection efficiency for large-size particles that account for a large proportion of mass, but the collection efficiency for the large number of ultrafine particles in fly ash is not high, especially for submicron The collection efficiency of particles will be lower, resulting in a large amount of ultra-fine particles being directly discharged into the atmosphere. Coal-burning ultra-fine particles have become one of the main sources of atmospheric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/06
Inventor 屈成锐徐斌吴健刘建新
Owner HENAN UNIV OF SCI & TECH
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