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Wet-type oxidative denitration and energy utilization method of smoke

一种湿式氧化、能源化的技术，应用在一氧化二氮捕获、化学仪器和方法、分离方法等方向，能够解决运行费用高、易中毒、催化剂强度不够等问题，达到经济效益巨大的效果

Inactive Publication Date: 2013-04-03
HENAN LVDIAN ENERGY SAVING & ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the invention right of SCR flue gas denitrification technology belongs to the United States, and it has the disadvantages of high cost, large equipment investment, high operating cost, insufficient catalyst strength and easy poisoning.

Method used

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  • Wet-type oxidative denitration and energy utilization method of smoke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 1L of ferric chloride solution with a hydrogen ion concentration of 1mol / L and a ferric iron concentration of 2.7mol / L, and then at 30°C and at one atmosphere, pass in nitric oxide gas with an amount of 1.7mol, The reaction time is 0-4h until the absorption liquid becomes dark brown and stops. After standing for 1h, the absorption liquid is filled with oxygen

[0025] 1.35mol, the reaction time is 3-5h, the released nitrogen dioxide gas is passed into the combustion furnace and burned, 30g kerosene is sprayed, and the temperature difference of the combustion furnace is 180°C.

Embodiment 2

[0027] Take 300ml of ferric chloride solution with a hydrogen ion concentration of 0.7mol / L and a ferric iron concentration of 1.3mol / L, and then at 30°C and one atmosphere pressure, pass in nitric oxide gas, the amount of pass is 0.39mol The reaction time is 0-3h until the absorption liquid turns dark brown and stops. After standing for 1h, the absorption liquid is filled with 0.22mol of oxygen, and the reaction time is 0-5h. The released nitrogen dioxide gas is passed into the combustion furnace and burned. Inject 22g of kerosene, and the temperature difference of the combustion furnace is 120°C.

Embodiment 3

[0029] Take 300ml of ferric chloride solution with a hydrogen ion concentration of 0.7 mol / L and a ferric iron concentration of 1.3 mol / L, and then at 30°C, pass in nitric oxide gas, the passing volume is 0.39 mol, the reaction time is 0-3h, until the absorption liquid turns dark brown and stop. After standing for 1h, the absorption liquid is filled with oxygen 0.22mol, and the reaction time is 0-5h. The released nitrogen dioxide gas is burned in the combustion furnace and sprayed into kerosene. 22g, the heating temperature difference of the combustion furnace is 120°C; the combustion pressure in the sealed pressure furnace can be as high as about 28 atmospheres.

[0030] A flue gas wet oxidation denitrification and energy utilization method provided by the present invention has the following beneficial effects:

[0031] 1. Change the existing treatment process to achieve denitrification, while reducing the investment cost and device scale, and reducing the operating cost. It is a ...

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Abstract

The invention relates to a wet-type oxidative denitration and energy utilization method of smoke, which comprises the following steps of: filling smoke which contains nitrogen oxides (NOX) and is to be processed into an acid ferrous iron solution; at temperature of 0-100 DEG C, absorbing the NOX, to generate dark brown mixing liquid containing nitroso ferrous salt, nitric acid and nitrous acid; oxidizing the mixing liquid; adding an oxidizing agent into denitrated absorbing liquid; releasing nitrogen dioxide, collecting and safely storing; burning the nitrogen dioxide, as a combustion improver, with a fuel, to generate thermal energy and kinetic energy, so as to realize heat supply or thermal / electric combined supply and to achieve the purpose of energy utilization.

Description

Technical field [0001] The invention relates to the technical field of flue gas purification, in particular to a flue gas wet oxidation denitration and energy utilization method. Background technique [0002] The gas produced by the combustion of fuel contains harmful components of nitrogen oxides, mainly nitrogen monoxide, nitrogen dioxide, dinitrogen trioxide and a small amount of dinitrogen pentoxide, abbreviated as NO X . Eliminate NO X , The process of purifying exhaust gas is called denitration. [0003] At present, my country’s x There are three main control methods: pre-combustion control, mid-combustion control and post-combustion control. Pre-combustion control refers to the selection of low-nitrogen fuels, but the cost is high and engineering applications are less. In-combustion control refers to the improvement of combustion methods and production processes, using low NO x Combustion technology to reduce NO in the furnace x The cost of this method is low, but due to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/79B01D53/56
CPCY02C20/10Y02A50/20
Inventor 田文学贾汉东李慧陈晨
Owner HENAN LVDIAN ENERGY SAVING & ENVIRONMENTAL PROTECTION TECH
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