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A high-voltage electric field preionization-laser induced ionization desulfurization and denitrification method

A technology of desulfurization and denitrification, high-voltage electric field, applied in the field of air pollution control, can solve the problems of bulky equipment, complex process, high energy consumption, etc., and achieve the effect of overcoming high energy consumption, reducing volume, and completely collecting

Active Publication Date: 2015-11-11
赵根
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is to provide a high-voltage electric field pre-ionization-laser-induced ionization desulfurization and denitrification method that is simple in equipment, easy to operate, and can be used independently or in combination without changing the existing technical means and devices. Various desulfurization and denitrification methods have disadvantages such as high energy consumption, bulky equipment, complex process, and low efficiency, so as to improve the removal rate of sulfur dioxide and nitrogen-containing waste

Method used

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  • A high-voltage electric field preionization-laser induced ionization desulfurization and denitrification method
  • A high-voltage electric field preionization-laser induced ionization desulfurization and denitrification method
  • A high-voltage electric field preionization-laser induced ionization desulfurization and denitrification method

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Embodiment 1

[0043] like figure 1 Shown, a kind of high voltage electric field pre-ionization-laser induced ionization desulfurization and denitrification method of the present invention comprises the following processes:

[0044] The flue gas containing sulfur dioxide and nitrogen oxides produced by combustion flows into the fence-shaped desulfurization and denitrification system at a certain rate from the flue gas inlet 1. Under the action of the high-voltage electric field formed between the positive pole 2 and the negative plate 5, sulfur dioxide and nitrogen oxides The component of the substance is pre-ionized first, and the electric field voltage is controlled at 800kV;

[0045] When the flue gas pre-ionized by the high-voltage electric field flows through the area of ​​the laser ray field 7 generated by the laser 3, the sulfur dioxide and nitrogen oxide molecules in the flue gas are ionized into SO under the induction of the laser. 2 + , NO + , NO 2 + For ions and electrons, 6 ...

Embodiment 2-5

[0049] According to the same method as in Example 1, there are three lasers with wavelengths of 266nm, 320nm and 350nm each, which are arranged in a uniform double circle around the end of the flue gas inlet 1, and the laser beam emission direction is at an angle of 60° with the plane where the center of the circle is located. 2-5 Select different electric field voltages, laser wavelengths, laser pulse widths and total laser power to study the desulfurization effect of high-voltage electric field-laser induced synergy on the flue gas of the same component. The results are shown in the following table:

[0050]

[0051] In summary, the present invention adopts the high-voltage electric field-laser induced synergistic ionization method for desulfurization and denitrification, and its removal efficiency is obvious; compared with using high-voltage electric field ionization or laser ionization alone, when the same removal rate is reached , the electric field voltage required for...

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Abstract

The invention discloses a desulfurization and denitrification method implemented by preionization-laser induced ionization in a high-voltage electric field. The desulfurization and denitrification method comprises the following processes: under a synergistic effect of a high-voltage electric field and laser, sulfur dioxide and nitric oxide components in sulfur dioxide and nitric oxides containing flue gas produced by burning is subjected to a preionization-ionization process; after ionized released electrons are in an ionic state, the electrons are instantaneously adsorbed to a negative plate under the action of a high-voltage electric field, and then neutralized and adsorbed by water (or an alkaline solution) flowing downwards from the top end on the surface of the negative plate; a newly formed solution flows to the inside of a collecting tank to be recycled under the action of gravity; purified flue gas is discharged from an exhaust system. According to the method disclosed by the invention, the required equipment is simple and easy to operate, and the method can be independently used or jointly used under the condition of not changing existing technological means and devices, and overcomes the defects of high energy consumption, huge equipment size, complex process and low efficiency and the like in existing various desulfurization and denitrification methods; the method obviously increases the removal rates of sulfur dioxide and nitrogenous wastes, so that the greenization degree is greatly increased.

Description

technical field [0001] The invention relates to a flue gas desulfurization and denitrification method, in particular to a high-voltage electric field preionization-laser induced ionization desulfurization and denitrification method, which belongs to the field of air pollution control. Background technique [0002] As a major polluting gas, sulfur dioxide has been controlled for many years in China. The Air Pollution Prevention and Control Law of the People's Republic of China promulgated in September 1987 is the basic legal basis for the prevention and control of polluting gases produced by coal combustion. It underwent two revisions in 1995 and 2000. In the Air Pollution Control Law of 2000, detailed and strict regulations were made on the emission concentration of sulfur dioxide. Newly built thermal power plants and other large and medium-sized pollutant discharge enterprises must build desulfurization devices or take other measures to control sulfur dioxide emissions if ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/32
CPCY02A50/20
Inventor 赵根
Owner 赵根
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