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Efficient desulfuration and denitration method for coal combustion

A coal combustion and high-efficiency technology, applied in the direction of combustion method, fuel burned in molten state, combustion type, etc., can solve the problems such as difficult to meet the NOx emission standards, and achieve the effect of increasing the reaction speed, improving the completion degree, and improving the contact completeness

Inactive Publication Date: 2020-02-07
浙江新中港热电股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the implementation of ultra-low emissions in the "Emission Standards for Large Pollutants from Thermal Power Plants", the emission concentrations of SO2 and NOx must be lower than the standards of 35 and 50mg / Nm3 respectively. compliance issues

Method used

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  • Efficient desulfuration and denitration method for coal combustion
  • Efficient desulfuration and denitration method for coal combustion
  • Efficient desulfuration and denitration method for coal combustion

Examples

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Effect test

Embodiment 1

[0039] A method for efficient desulfurization and denitrification of coal combustion, referring to figure 1 , including the following steps: coal enters from the circulating fluidized bed boiler for combustion, the circulating fluidized bed boiler includes a furnace 1 for burning coal, the furnace 1 is in a cylindrical shape, a coal inlet pipe 11 and a secondary air pipe 12 are installed at the lower end of the furnace 1, The side wall near the top of the furnace 1 is provided with an outlet, the outlet is connected with a cyclone separator 3 , and the secondary air pipe 12 is also connected with a feed pipe 13 . The desulfurizing agent is added from the feed pipe 13, and the desulfurizing agent is limestone powder. The coal is added from the coal inlet pipe 11, and the desulfurizing agent enters the furnace 1 under the drive of the secondary air in the secondary air pipe 12. The outlet of the furnace 1 and the inlet of the cyclone separator 3 are sprayed with a denitration ag...

Embodiment 2

[0042] A method for efficient desulfurization and denitrification of coal combustion, referring to figure 2 The difference from Embodiment 1 is that the furnace 1 is provided with a coal inlet pipe 11, a secondary air pipe 12 and a discharge port sequentially from bottom to top along the height direction, and the discharge port of the furnace 1 is connected to the cyclone separator 3 through the pipeline 2. A desulfurizing agent is sprayed into the furnace 1 near and above the secondary air duct 12, and the desulfurizing agent is limestone powder.

[0043] refer to image 3 and Figure 4 , the inner wall of the furnace 1 and between the coal inlet pipe 11 and the secondary air pipe 12 are fixedly provided with a mounting frame 15, and the mounting frame 15 is equipped with a support ring 4 through bolts, combined with Figure 4 The side of the support ring 4 facing downward is provided with a first notch 41 along its circumferential direction, the support ring 4 communicates ...

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Abstract

The invention relates to an efficient desulfuration and denitration method for coal combustion and relates to the technical field of clean combustion. The method comprises the following steps that coal is injected into a coal feeding pipe of a circulation fluidized bed boiler and burns in a furnace, and a desulfuration agent is sprayed into the furnace and sprayed into the portion, located at a cyclone separator inlet, of a discharging port of the furnace. According to the method, SO2 and NOx in smoke are removed through the desulfuration agent and a denitration agent, the content of SO2 and NOx in discharged gas is lowered, and the discharged gas meets the state-specified super-low emission concentration standard.

Description

technical field [0001] The invention relates to the technical field of clean combustion, in particular to a method for efficient desulfurization and denitrification of coal combustion. Background technique [0002] Circulating fluidized bed (CFB) combustion technology is a new type of clean combustion and emission technology developed in recent years, which has been widely used and vigorously developed in China. On the one hand, the circulating fluidized bed boiler has a wide range of fuel adaptability, and can be used to burn general thermal coal, as well as washed coal gangue, washed coal and coal slime, etc.; on the other hand, the circulating fluidized bed boiler has high combustion efficiency and high efficiency Desulfurization, and low emissions of nitrogen oxides (NOx) and other environmental protection characteristics; at the same time, circulating fluidized bed boilers also have the advantages of large load adjustment range, low load stable combustion, and easy compr...

Claims

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Application Information

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IPC IPC(8): F23C10/22F23J7/00F23J15/02B01D53/50B01D53/56
CPCB01D53/508B01D53/56F23C10/22F23J7/00F23J15/02F23J2215/10F23J2215/20
Inventor 谢百军
Owner 浙江新中港热电股份有限公司
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