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Composite dioxygen oxidizing and denitrifying process method and device

A process method and compound hydrogen peroxide technology, applied in chemical instruments and methods, separation methods, gas treatment and other directions, can solve the problems of increasing investment in dust removal systems, high requirements for flue gas quality, and high initial investment costs, and achieve fast denitrification treatment. , The effect of short flue gas residence time, reducing investment and operating burden

Inactive Publication Date: 2016-12-07
山东格润内泽姆环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Their respective problems are that the initial investment cost of purchasing a plasma generating device is very high, and the plasma generating device also has high requirements on the quality of flue gas entering its interior, which increases the investment in the dust removal system before denitrification; the initial investment in purchasing an ozone generator The cost is high, and it takes about 7 kilowatt-hours of electricity to generate 1kg of ozone, and the later operation cost is also high; hydrogen peroxide can oxidize NO at the same time x and SO 2 , the consumption is too large, and the efficiency of hydrogen peroxide is low, the highest is about 60%

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  • Composite dioxygen oxidizing and denitrifying process method and device
  • Composite dioxygen oxidizing and denitrifying process method and device
  • Composite dioxygen oxidizing and denitrifying process method and device

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Embodiment 1

[0049] This embodiment provides a compound hydrogen peroxide oxidation denitrification process, including the steps of: configuring a denitrification agent according to the weight ratio of sodium chlorite and sodium hypochlorite at a ratio of 3:1. Then mix the denitration agent and water to prepare a denitration solution. The obtained denitrification liquid is mixed with the untreated nitrate-containing flue gas for denitrification reaction.

[0050] In another preferred improved embodiment, before performing the denitration reaction, the flue gas containing nitrate to be treated is firstly subjected to dust removal treatment.

[0051] In another preferred improved embodiment, the mass concentration of the denitration agent in the denitration solution is 25%. The denitrification solution with a mass concentration of 25% can achieve better denitrification efficiency while controlling the input cost of denitrification agent. According to NO in flue gas containing nitrate to be...

Embodiment 2

[0054] This embodiment provides a compound hydrogen peroxide oxidation denitrification device, including a denitrification tower 1, a first atomization spray system 3, a first plate type demister 60, a first circulating pump 4, a metering pump 5 and a denitration agent solution storage tank 6; the lower part of the side wall of the denitrification tower 1 is provided with a denitrification tower air inlet 11, and the top of the denitrification tower 1 is provided with a denitrification tower gas outlet 12; the first atomization spray system 3 is located in the denitrification tower Tower 1, and is located between the denitrification tower inlet 11 and the denitrification tower outlet 12; the first flat plate demister 60 is located inside the denitration tower 1, and is located in the first fog between the chemical spray system 3 and the gas outlet 12 of the denitrification tower; the liquid inlet of the first circulation pump 4 communicates with the bottom of the denitration to...

Embodiment 3

[0060] This embodiment provides a compound hydrogen peroxide oxidation denitrification device, including a denitrification tower 1, a first atomization spray system 3, a first circulation pump 4, a metering pump 5 and a denitrification agent solution storage tank 6; the denitrification tower 1 The lower part of the side wall is provided with a denitrification tower air inlet 11, and the top of the denitrification tower 1 is provided with a denitrification tower gas outlet 12; the first atomization spray system 3 is located inside the denitrification tower 1, and is located in the between the air inlet 11 of the tower and the gas outlet 12 of the denitrification tower; the liquid inlet of the first circulation pump 4 communicates with the bottom of the denitration tower 1, and the liquid outlet of the first circulation pump 4 is connected to The pipe is connected with the first atomizing spray system 3; the liquid outlet of the metering pump 5 is connected with the liquid inlet ...

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Abstract

The invention belongs to the technical field of denitrifying treatment of nitrate-containing flue gas and particularly provides a composite dioxygen oxidizing and denitrifying process method. The composite dioxygen oxidizing and denitrifying process method comprises the following steps of: weighing and mixing a denitrifying agent and water to prepare denitrifying liquid, wherein the denitrifying agent mainly comprises sodium chlorite and sodium hypochlorite according to the weight ratio of 3-5:1; mixing the denitrifying liquid and nitrate-containing flue gas to be treated so as to carry out denitrifying reaction. The invention also provides a corresponding composite dioxygen oxidizing and denitrifying device. The dioxygen oxidizing and denitrifying method and device provided by the invention have the advantages that the denitrifying efficiency is high, the cost for infrastructure at the earlier stage and operation at the later stage is lower, the reliability is good, and denitrifying treatment for difficultly-treated low-temperature flue gas exhausted by furnace types such as a chain furnace, an incinerator and a kiln furnace and the like can be realized.

Description

technical field [0001] The invention belongs to the technical field of denitrification treatment of flue gas containing nitrate, and in particular relates to a compound hydrogen peroxide oxidation denitrification process method and device. Background technique [0002] Chain furnaces, incinerators, kilns and other furnaces emit flue gas that contains nitrogen oxides and sulfides and other pollutants. Direct emission will cause air pollution. It needs to be desulfurized, denitrified and dust-removed before being discharged up to standard. Since the working temperature of furnaces such as chain furnaces, incinerators, and kilns is below 700°C, most of the time it is around 550°C, and the boiler load is adjusted at any time as the temperature changes, resulting in large changes in furnace temperature and exhaust gas temperature, so Not suitable for SCR, SNCR and low NO x Any process in combustion technology. [0003] In the prior art, for the flue gas discharged from chain fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/56
CPCB01D53/78B01D53/56B01D2251/108B01D2251/304B01D2258/0283
Inventor 张美玉张欢
Owner 山东格润内泽姆环保科技有限公司
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