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Boiler in-furnace desulfurization, denitration solid mercury integrated method

A technology for desulfurization, denitrification, and boiler furnaces, applied in the field of control, can solve the problems of low pollutant removal efficiency and high pollutant cost by dry method, and achieve the effects of accelerating combustion reaction speed, broad market prospects, and improving efficiency.

Inactive Publication Date: 2010-06-09
TONGJI UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of low efficiency of dry removal of pollutants, high cost of wet removal of pollutants and secondary pollution, and the shortcomings of one method that can only remove one pollutant in the prior art

Method used

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  • Boiler in-furnace desulfurization, denitration solid mercury integrated method
  • Boiler in-furnace desulfurization, denitration solid mercury integrated method
  • Boiler in-furnace desulfurization, denitration solid mercury integrated method

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Embodiment Construction

[0022] Such as Figure 1-3 As shown, in the area above the burner where the temperature is 1100°C to 1400°C, a number of (4 or 12) modified manganese oxide nozzles are arranged in a corner or wall, inversely cut or opposed. Modified manganese oxide powder contains MnO, Mn 2 o 3 and MnO 2 , where the highly active component MnO 1.7-1.9 It accounts for more than 90% of the total amount, and the modified component CaO and the like account for 1-10% of the total amount. Manganese oxide powder with an average particle size of 65 μm is carried by air and sprayed at a direct jet velocity of 50 m / s, and its swirl intensity is 1 to 4.5. It is disposed in a position with a temperature of 1000-1400°C by means of continuous spraying, and the product of the manganese absorbent is collected by the boiler dust collector. The removal rates of nitrogen oxides, sulfur oxides and mercury can respectively reach more than 80%.

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Abstract

The invention discloses an integrated technique of desulfidation, denitration and mercury solidification in a boiler stove, and the invention injects modified MnO2 (manganese dioxide) into a boiler furnace and synthetically removes sulfur dioxide, nitrogen oxide and mercury by using the strong oxidizing property of manganese oxide; meanwhile, as the reaction of removing various infectants with modified MnO2 (manganese dioxide) is favorable for the conglobation of micro dust particles, the method can also reduce the exhaustion of inhalable particulates of PM2.5 from boilers.

Description

technical field [0001] The invention belongs to the field of energy and power engineering, and relates to an efficient and low-cost integrated multi-pollutant SO 2 , NOx, Hg and PM2.5 control methods. Background technique [0002] Environmental protection projects have only social benefits, but no economic benefits to enterprises. The investment, operation and maintenance costs of the industrialized and mature wet pollutant control technologies are relatively high, while the removal efficiency of dry pollutant control technologies is low, and most technologies Both can only control one kind of pollutant. With people's emphasis on the environment and the improvement of environmental legislation standards, there is an urgent need to study a low-cost multi-pollutant SO 2 , NO x , Hg and PM2.5 control methods. Contents of the invention [0003] The object of the present invention is to overcome the disadvantages of low efficiency of removing pollutants by dry method, high c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/81B01D53/60B01D53/64
CPCY02A50/20
Inventor 安恩科
Owner TONGJI UNIV
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