The utility model content

The purpose of this utility model is to overcome the weak point of above-mentioned conventional art, provide a kind of not changing boiler any structure and the situation of former boiler characteristics under increase substantially coal utilization ratio, realize economizing on coal, reducing a kind of environmental protection and energy saving coal powder injection burner of nitrogen oxide and sulfur dioxide (SO2) emissions.

The purpose of this utility model reaches by following technical measures:

A kind of environmental protection and energy saving coal powder injection burner, comprise boiler and coal bunker, it is characterized in that: also comprise micropowder grinding, the charging aperture of described micropowder grinding is connected with coal handling plant, described coal handling plant is connected with coal bunker, the discharging opening of described micropowder grinding is connected with the pipeline that dusts, and the other end of the described pipeline that dusts is connected with burner noz(zle), and described burner noz(zle) is arranged in the combustion chamber of boiler.Micropowder grinding is the abbreviation of high-pressure micronizer powder machine, mainly is applicable to grinding of conventional material, such as the superfine powder processing of the materials such as coal, active carbon, bentonite, potter's clay, carbon black, kaolin, lime stone, calcite.In the utility model, the coal that lumpiness and moisture are qualified is put coal bunker into, by coal handling plant coal is transported to micropowder grinding and carries out fragmentation and become coal dust, and coal dust sprays into the combustion chamber internal combustion of boiler by the stokehold of the Pipeline transport that dusts through the burner noz(zle) eddy flow.The utility model carries out stokehold nonstick system of control powder, conveying and spray combustion in the situation of any structure that does not change boiler and former boiler characteristics, be characterized in the fire grate burning of chain-grate boiler and the burning of dusting are organically combined, share on a stove, utilize each other, maximize favourable factors and minimize unfavourable ones.In combustion process, coal dust is lighted by the fire grate grate, the moment burning, and the thermal-flame that coal dust firing forms improves rapidly fire box temperature.At this moment the efficiency of combustion of coal dust can reach more than 98%, simultaneously can strengthen again the burning in fire grate coal seam, and therefore, this compound combustion mode effect more than 15% that can realize economizing on coal reduces the discharging of nitrogen oxide and sulfur dioxide simultaneously.

As a kind of improvement, described micropowder grinding is electrically connected with automatic control system.Can realize stokehold nonstick system of control powder, conveying by automatic control system, significantly alleviate intensity and the difficulty of manpower work.Automatic control system can also realize easily that fineness of pulverized coal is adjustable, by adjusting the size of intake, adjusts the fineness of coal dust, satisfies the demand of various operating modes.

As a kind of improvement, described coal handling plant is provided with the frequency conversion metering device.

As a kind of improvement, described automatic control system is electrically connected with the frequency conversion metering device.The coal amount that the frequency conversion metering device is carried coal handling plant is more easily measured, and can better control by automatic control system the input quantity of coal, satisfies the demand of various operating modes.

As a kind of improvement, described coal handling plant is provided with tramp iron separator.Tramp iron separator can be selected removing with the irony foreign material that mix in the coal, avoids it to the micropowder grinding injury.

As a kind of preferred version, described tramp iron separator is electric magnetic iron remover or permanent magnet tramp iron separator.Electric magnetic iron remover magnetic force is strong, and is effective, but need to consume electric energy; Permanent magnet tramp iron separator de-ferrous effect is poor, but does not have other energy resource consumption.

As a kind of preferred version, described burner noz(zle) is the spiral-flow type burner noz(zle).Form eddy flow when the spiral-flow type burner noz(zle) can make pulverized coal injection go out, reach better combustion efficiency, programming rate reduces the generation discharging of nitrogen oxide and sulfur dioxide faster.

As a kind of preferred version, described micropowder grinding is Horizontal micronizer.Horizontal micronizer is another patent of our company, has longer service life, and to coal lumpiness and moisture require low, also farther to the fed distance of coal dust.

As a kind of improvement, the end that the described pipeline that dusts is connected with discharging opening is provided with coal even separator.Coal even separator can evenly divide the coal dust of micropowder grinding output by the pipeline that dusts delivers to different boilers.

As a kind of improvement, described coal even separator has a plurality of outlets, and a described outlet is connected with a burner noz(zle) by the pipeline that dusts.In the boiler burner noz(zle) can be set, can make a micropowder grinding linking number platform boiler by coal even separator, make transformation, use, the maintenance cost of conventional chain type boiler low.

Owing to having adopted technique scheme, compared with prior art, having the utility model has the advantages that:

The utility model is by adopting the swirl nozzle design of Horizontal micronizer, automatic control system, science in the device, have and automatically to control coal, automatically regulate the amount of dusting, equipment volume is little, and reliability is high, installation and maintenance are easy to use, can transform in the situation that does not change conventional chain type boiler agent structure, operating cost is low, consumes energy low, the advantages such as fed distance is far away, and the replacing consumable accessory is quick.

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.