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Tangential pulverized coal fired boiler and coal-fired power generation system

A technology of pulverized coal combustion and four-corner tangent, which is applied in the combustion of block fuel and powder fuel, the combustion of liquid fuel and powder fuel, the combustion of gaseous fuel and powder fuel, etc. To meet the needs of environmental protection and other issues

Pending Publication Date: 2018-11-06
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] As mentioned above, in order to achieve sustainable social and economic development, we put forward more and more stringent requirements for environmental protection, and the current power plant boilers have been difficult to meet the current or future environmental protection needs

Method used

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  • Tangential pulverized coal fired boiler and coal-fired power generation system
  • Tangential pulverized coal fired boiler and coal-fired power generation system
  • Tangential pulverized coal fired boiler and coal-fired power generation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 , figure 2 As shown, take a four-corner tangential combustion boiler with an intermediate storage bin-type steel ball mill hot air pulverization system as an example (the system equipment involved in this example is only the main equipment in the entire system, and is not listed. all devices).

[0028] The pulverized coal enters the drying pipe 3 from the coal feeder 2, mixes with the hot air coming out of the preheater 9 and enters the drying pipe 3, and then enters the coal mill 4, and the air powder coming out of the drying pipe 3 passes through the coal mill 4 and then enters the coarse powder Separator 5, unqualified coal powder returns to coal feeder 2, qualified coal powder enters fine powder separator 6, after passing through fine powder separator 6, qualified coal powder enters coal powder bin 7, under the action of other equipment The hot air from the preheater 9 carries the pulverized coal from the pulverized coal bin 7 into the corner bur...

Embodiment 2

[0031] Such as figure 2 , Figure 4 As shown, on the basis of the first embodiment, the four walls of the furnace 1 are provided with two-layer exhaust gas nozzles in the vertical direction, including the first layer of wall-type exhaust nozzles 12-1 and the second layer of wall-type exhaust nozzles. Air spout 12-2.

Embodiment 3

[0033] Such as figure 2 , Figure 5 As shown, on the basis of the second embodiment, the corner-type exhaust gas nozzles 16 arranged at the four diagonal corners of the furnace 1 are further added. After the exhaust gas enters the furnace, it forms a coupled combustion of angular tangential combustion and wall tangential combustion.

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Abstract

The invention discloses a tangential pulverized coal fired boiler, comprising a hearth and corner burner units arranged at four corners of the hearth; gas entering the hearth from the corner burner units forms corner tangent in the center of the hearth; each of the four walls of the hearth is provided with a wall-type exhaust gas nozzle; the exhaust gas is sprayed into the hearth via the wall-typeexhaust gas nozzles to form wall tangent in the center of the hearth; the diameter of the wall tangent is greater than that of the corner tangent. The invention also discloses a coal-fired power generation system using the above tangential pulverized coal fired boiler. The tangential pulverized coal fired boiler and the coal-fired power generation system have the advantages that exhaust gas is delivered in from the four sides, exhaust gas wall tangential firing is formed, NOx emission, fly ash and large slag are further decreased for the tangential pulverized coal fired boiler with exhaust gas, and boiler efficiency is further improved.

Description

technical field [0001] The invention relates to the field of coal-fired power generation equipment, in particular to a pulverized coal combustion boiler. Background technique [0002] my country's current power plant boilers have problems such as high pollutant emissions and high coal consumption per unit of power generation. my country's energy consumption accounts for 8% to 9% of the world's total, but SO 2 Emissions account for 15.1% of the world's NO x accounted for 10.1%, CO 2 Accounted for 13.2%. Among them, the SO released from coal combustion in my country 2 Accounting for 85% of the country's total emissions, CO 2 Accounted for 85%, NO x Accounted for 60%, dust accounted for 70%. Acid rain areas have exceeded 40% of the country's land area. Therefore, the improvement of power plant boilers plays an important role in the realization of my country's "energy saving and emission reduction" goals. [0003] A typical coal-fired power generation system includes eq...

Claims

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Application Information

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IPC IPC(8): F23C5/32F23C7/00F23K3/02
CPCF23C5/32F23C7/00F23K3/02
Inventor 杨章宁孔红兵安维宏吕小亮莫春鸿陈灿张山鹰倪刚董康
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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