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Smoke wet-type oxidation integral desulfuration denitration and energy using method

A desulfurization, denitrification, wet oxidation technology, applied in chemical instruments and methods, separation methods, air quality improvement, etc., can solve problems such as large energy consumption of devices, troubles in collecting by-products, high cost of organic solvents, catalyst stabilization and regeneration reduction, etc. achieve huge economic benefits

Inactive Publication Date: 2013-03-27
HENAN LVDIAN ENERGY SAVING & ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the dry processes represented by the electron beam irradiation (ER) method, activated carbon adsorption desulfurization and denitrification, and ammonia method have good desulfurization and denitrification efficiencies, problems such as high energy consumption of the device and subsequent collection of by-products have plagued its development. The essential
The wet process represented by lye absorption method, oxidation absorption method, iron-cobalt complex complex absorption, etc. also has the reuse of lye, the volatilization of organic solvents and high costs, the stability of catalysts and regeneration and reduction. , effective disposal of by-products and other difficult problems

Method used

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  • Smoke wet-type oxidation integral desulfuration denitration and energy using method

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Embodiment 1

[0024] Take 1 L of ferric chloride solution with a hydrogen ion concentration of 1 mol / L and a ferric iron concentration of 1.66 mol / L, and feed sulfur dioxide and nitrogen monoxide gas simultaneously at 30°C under one atmospheric pressure, the amount of which is 0.84 mol respectively , 1.66mol, the reaction time is 0-3h, stop until the absorption liquid turns dark brown, after standing for 1h, the absorption liquid is fed with 0.83mol oxygen, the reaction time is 0-5h, the released nitrogen dioxide gas enters the combustion Furnace combustion, spray 20g of kerosene, the temperature difference of the combustion furnace is 120°C; the combustion pressure in the sealed pressure-resistant furnace can be as high as about 25 atmospheres.

[0025] A proper amount of oxygen is introduced into the absorption solution after the oxidation treatment, so that all the divalent iron in the solution is converted into trivalent iron. The resulting solution was concentrated and recrystallized t...

Embodiment 2

[0027] Take 1 L of a mixed solution of ferric chloride and ferrous chloride with a hydrogen ion concentration of 0.6 mol / L, a ferric iron concentration of 1.66 mol / L, and a ferrous iron solution concentration of 0.54 mol / L. Simultaneously feed sulfur dioxide and nitrogen monoxide gas under atmospheric pressure, the amount of feed is 0.84mol, 2.2mol respectively, the reaction time is 0-3h, stop until the absorption liquid turns dark brown, after standing for 1h, the absorption liquid is passed into 1.1 mol oxygen, the reaction time is 0-5h, the released nitrogen dioxide gas is cooled and pressurized, sprayed into 25g of kerosene, and the temperature difference of the combustion furnace is 140°C; the combustion pressure in the sealed pressure-resistant furnace can reach nearly 30 atmospheres .

[0028] A proper amount of oxygen is introduced into the absorption solution after the oxidation treatment, so that all the divalent iron in the solution is converted into trivalent iron....

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Abstract

The invention discloses a smoke wet-type oxidation integral desulfuration denitration and energy using method which comprise leading smoke containing SO2 and NOX in an acid ferric iron solution or a ferric iron and ferrous mixed solution, absorbing the NOX and the SO2 under 0-100 DEG C to generate a puce mixing solution composed of nitrous ferrous salt, sulfate, less nitric acid and nitrous acid, accordingly achieving desulfuration denitration treatment on the smoke, leading the mixing solution in an oxidizing agent to enable the nitrogen dioxide to be discharged, collected and safely stored, then using the nitrogen dioxide to serve as a combustion improver to burn with fuel to produce heat and motive power, achieve heat supply or heat / electricity joint supply and achieve a purpose of energy use.

Description

technical field [0001] The invention relates to the technical field of flue gas purification, in particular to a flue gas wet oxidation integrated desulfurization and denitrification and energy utilization method. Background technique [0002] Due to the difference in fuel composition, the flue gas produced during combustion contains both nitrogen oxides and sulfur dioxide, usually the latter content is greater than the former. Desulfurization and denitrification technology can be divided into two categories: simultaneous desulfurization and denitrification technology in the combustion process in the furnace and desulfurization and denitrification technology in the flue gas after combustion. Because the simultaneous desulfurization and denitrification technology in the combustion process affects the combustion degree of fuel and reduces the thermal efficiency of the boiler Therefore, simultaneous desulfurization and denitrification of flue gas after combustion has become a d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/60
CPCB01D53/60Y02A50/20
Inventor 田文学贾汉东李慧陈晨
Owner HENAN LVDIAN ENERGY SAVING & ENVIRONMENTAL PROTECTION TECH