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Method for realizing energy-saving running of coal burning boiler

A technology for coal-fired boilers and furnaces, which is applied in the direction of combustion methods, fuel supply adjustment, and combustion control. It can solve problems such as incomplete combustion, boilers that cannot maximize efficiency, and carbon residues.

Active Publication Date: 2015-02-04
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
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  • Abstract
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  • Application Information

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Problems solved by technology

When the amount of oxygen is insufficient or the mixture with coal powder is not good, the reaction 2C+O will occur 2 =2CO, some carbon monoxide is generated, or some carbon residue will be accompanied, which will lead to an increase in the carbon content of fly ash. At this time, the combustion is not complete, and the boiler cannot exert its maximum efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Grid measuring points are arranged in the horizontal and vertical directions on the furnace wall around the furnace combustion zone of the four-corner tangential circle boiler burning bituminous coal. The distance between the grid measuring points is 2 meters. The laser online gas analyzer is used to monitor the three different positions in real time. Concentration of carbon monoxide in pulverized coal combustion products in the furnace combustion zone at grid measuring point 1, measuring point 2 and measuring point 3 (μl / l) and the concentration of carbon dioxide (μl / l), at the same time, take the fly ash generated by combustion from each measuring point every 0.5 hours, and use the industrial analysis method to analyze the carbon content of the fly ash FC ash (%). Summarize the monitoring data of each measuring point within 24 hours, see Table 1, Table 2, and Table 3 (for the convenience of statistics, only C CO 、C CO2 Concentration data corresponding to every in...

Embodiment 2

[0030] The grid measuring points are arranged horizontally and vertically on the furnace wall around the furnace combustion zone. Concentration of carbon monoxide in pulverized coal combustion products in the furnace combustion zone at measuring point 1', measuring point 2' and measuring point 3' (μl / l) and the concentration of carbon dioxide (μl / l), at the same time, take the fly ash generated by combustion from each measuring point every 0.5 hours, and use the industrial analysis method to analyze the carbon content of the fly ash (%). Summarize the monitoring data of each measuring point within 24 hours, see Table 4, Table 5, and Table 6 (for the convenience of statistics, only C CO 、C CO2 Concentration data corresponding to each interval of 0.5h), respectively for the 1’ pulverized coal combustion at the measuring point , and fly ash carbon content averaged to get =120 、 =144000 and =2.0; the pulverized coal combustion at measuring point 2' , and fly...

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Abstract

The invention relates to a method for realizing energy-saving running of a coal burning boiler. The method comprises the following steps of: arranging grid measuring points on furnace walls around a hearth combustion region in horizontal and vertical directions at the intervals of 1-2 meters, and monitoring the carbon monoxide concentration and carbon dioxide concentration of a coal dust burning product in the hearth combustion region at the grid measuring points in real time by using an online monitoring system; taking fly ash generated by combustion from each measuring point every half or one hour, and analyzing the carbon content of the fly ash; and summarizing monitoring data of each measuring point within 24 hours, calculating a comprehensive combustion index r, judging the combustion state of the boiler according to a combustion state distribution figure of an entire hearth drawn on the basis of comprehensive combustion indexes, and performing corresponding combustion adjustment on the boiler. Due to the adoption of the method, the combustion of the boiler can be monitored and adjusted, so that the problems of coking, fire extinguishment, incomplete local combustion, corrosion of a water-cooled walls and the like existing in the boiler are further prevented, and energy-saving running of the boiler is realized.

Description

technical field [0001] The invention belongs to the field of energy, and in particular relates to a method for realizing energy-saving operation of a coal-fired boiler. Background technique [0002] The energy-saving operation of traditional boilers mainly relies on monitoring the temperature field change in the furnace to adjust the combustion. However, the temperature field change in the furnace is greatly affected by the coal type, so this method has great uncertainty. Implementation There are many difficulties and inconveniences. [0003] For coal-fired boilers, the main reaction in the furnace is the combustion reaction of carbon. When the oxygen is sufficient and fully mixed and contacted with coal powder, the main reaction is C+O 2 =CO 2 , the product is mainly carbon dioxide. At this time, the combustion is complete and complete, and the boiler efficiency is the highest. When the amount of oxygen is insufficient or the mixture with coal powder is not good, the rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23N5/00F23N1/02
CPCY02E20/328
Inventor 汪永威吴文龙
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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