CN205216553U - Hydrogen peroxide solution deNOx systems - Google Patents

Hydrogen peroxide solution deNOx systems Download PDF

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Publication number
CN205216553U
CN205216553U CN201520966067.0U CN201520966067U CN205216553U CN 205216553 U CN205216553 U CN 205216553U CN 201520966067 U CN201520966067 U CN 201520966067U CN 205216553 U CN205216553 U CN 205216553U
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CN
China
Prior art keywords
hydrogen peroxide
denitrating tower
peroxide solution
denitrating
nitric acid
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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CN201520966067.0U
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Chinese (zh)
Inventor
姚俊新
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Hubei Weitian Environment Protection Technology Co Ltd
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Hubei Weitian Environment Protection Technology Co Ltd
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Priority to CN201520966067.0U priority Critical patent/CN205216553U/en
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Publication of CN205216553U publication Critical patent/CN205216553U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model relates to a hydrogen peroxide solution deNOx systems, including hydrogen peroxide solution storage jar, denitrating tower, static nitric acid separator and the nitric acid storage jar that sets gradually, the denitrating tower disposes atomizing nozzle, hydrogen peroxide solution storage jar with on -tube between the atomizing nozzle is provided with steam generator on the road, and steam and hydrogen peroxide solution that steam generator produced mix the back atomizing and get into the denitrating tower, and the denitrating tower bottom is provided with flue gas inlet, the flue gas from flue gas inlet get into the denitrating tower from lower to upper with hydrogen peroxide solution atomizing steam backmixing, static denitrated acid separator and denitrating tower switch -on are followed the mixed gas entering static denitrated acid separator that comes out at the denitrating tower top and are carried out gas -liquid separation, and the liquid phase export of static denitrated acid separator is taken over nitric acid storage jar, the gas exports of static denitrated acid separator puts through the atmosphere. Above -mentioned deNOx systems has a simple structure, and convenient operation's advantage has improved and has retrieved the effect to nitrogen oxide's oxidation, has improved denitration efficiency.

Description

A kind of hydrogen peroxide denitrating system
Technical field
The utility model belongs to industrial denitration technology field, is specifically related to a kind ofly utilize the NOx in hydrogen peroxide oxidation flue gas and reclaim the system and device of accessory substance nitric acid.
Background technology
In July, 2011, " fossil-fuel power plant atmospheric pollutant emission standard " (GB13224-2011) are implemented in Environmental Protection Department official approval.Because " fossil-fuel power plant atmospheric pollutant emission standard " (hereinafter referred to as New emission standard) relates to the Pollutant emission concentration control overflow of each thermal power generation unit whole operation phase, and in this " New emission standard ", significantly improve the discharge standard of thermal power plant's atmosphere pollution, to the sulfur dioxide of newly-built, built thermal power plant, the discharge restriction of nitrogen oxide, stricter than the control limit of current standard several times, considerably beyond US and European, become the tightest standard.Simultaneously " New emission standard " to be defined in territorial development density higher, environmental bearing capacity starts to weaken, or atmospheric environment capacity is less, ecological environment frailty, easy generation serious atmospheric problem of environmental pollution and need strictly to control Air Pollutant Emission key area (not yet specifying key area, city at present), strictly should control the pollutant emission behavior of enterprise, the concentration of emission of key area coal-fired electric generation furnace nitrogen oxide is less than 100mg/m 3.
In order to tackle the new demand of country to discharged nitrous oxides, environment protection, carrying out denitration to nitrogen oxide tail gas is industrial important necessary step.
Utility model content
The purpose of this utility model is to provide a kind of denitrating system utilizing hydrogen peroxide to be oxidized tail gas, main NO and NO reclaimed in tail gas 2, gained accessory substance nitric acid is as industrial cycle, and flow process is simple, and react completely, hydrogen peroxide utilization rate is high.
The technical scheme in the invention for solving the above technical problem is: a kind of hydrogen peroxide denitrating system, comprise the hydrogen peroxide storage tank set gradually, catalytic unit, denitrating tower, electrostatic nitric acid separator and nitric acid storage tank, described denitrating tower is configured with atomizer, connection pipeline between described hydrogen peroxide storage tank and described atomizer is provided with the catalytic unit heating hydrogen peroxide, hydrogen peroxide enters denitrating tower after being catalyzed into OH, gas approach is provided with bottom denitrating tower, flue gas enters denitrating tower from gas approach, and mix reverse with OH generates nitric acid from lower to upper, described electrostatic denitrated acid separator and denitrating tower are connected, from denitrating tower top, mixing gas out enters electrostatic denitrated acid separator and carries out gas-liquid separation, the liquid-phase outlet of electrostatic denitrated acid separator takes over described nitric acid storage tank, the gaseous phase outlet of electrostatic denitrated acid separator connects air.
Method of denitration corresponding to above-mentioned denitrating system is using hydrogen peroxide as oxidant, after HTHP catalysis, atomization is mixed vapour, then mixed vapour is mixed with flue gas, make the oxidized recovery of the nitrogen oxide in flue gas, final mixture is through gas-liquid separation, reclaim denitration accessory substance nitric acid and nitrous acid solution, the flue gas after denitration is arranged outward;
Chemical equation is
H 2O 2→2·OH
H 2O 2+·OH→HO 2·+H 2O
NO+HO 2·→NO 2+·OH
NO 2+·OH→HNO 3
NO+·OH→HNO 2
NO+H 2O 2→NO 2+H 2O
H 2O 2+2NO 2→HNO 3
Preferably, the mass concentration of hydrogen peroxide is 27.5% ~ 50%.
Technique corresponding to flue gas denitrification system of the present utility model adopts HTHP catalysis hydrogen peroxide, makes hydrogen peroxide produce more hydroxy radical group OH and HO 2react with nitrogen oxides in effluent, directly obtain nitric acid or nitrous acid, improve denitration effect, denitration is thoroughly complete, high-temperature steam can make hydrogen peroxide tend to be decomposed into the reaction of hydroxy radical, oxidability due to hydroxy radical will be far longer than the oxidability of hydrogen peroxide self, thus can obtain higher denitration effect, improves the denitration of hydrogen peroxide.
Compared with prior art, the utility model has the advantage of: provide a set of denitrating system, structure is simple, be convenient to assembly and adjustment, utilize the technique that hydrogen peroxide removes the nitrogen oxide in flue gas, principle is simple, improve the denitration effect of hydrogen peroxide, denitration reaction is thoroughly complete.
Accompanying drawing explanation
Fig. 1 is the structure chart of hydrogen peroxide denitrating system in the utility model embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the utility model is described in further detail.
A kind of hydrogen peroxide denitrating technique, hydrogen peroxide using 50% is as oxidant, by HTHP, hydrogen peroxide catalysis is generated OH, HTHP is that hydrogen peroxide is directly heated to 400 ~ 500 DEG C, the extra pressure that hydrogen peroxide produces is that 1.6 ~ 2.0KPa, OH mix with flue gas and (be mainly NO and NO to the nitrogen oxide in flue gas 2deng) carrying out oxid-reclamatiom, final mixture, through gas-liquid separation, reclaims denitration accessory substance nitric acid and nitrous acid solution, and the flue gas after denitration can be arranged directly outward;
Concrete chemical equation is
H 2O 2→2·OH
H 2O 2+·OH→HO 2·+H 2O
NO+HO 2·→NO 2+·OH
NO 2+·OH→HNO 3
NO+·OH→HNO 2
NO+H 2O 2→NO 2+H 2O
H 2O 2+2NO 2→HNO 3
Above-mentioned denitrating technique is realized by following system and device,
Hydrogen peroxide denitrating system, comprise the hydrogen peroxide storage tank 1 set gradually, denitrating tower 2, electrostatic nitric acid separator 3 and nitric acid storage tank 4 and hydrogen peroxide catalytic unit 5, described denitrating tower 2 is configured with atomizer 2.1, catalytic unit 5 for heating hydrogen peroxide is set between described hydrogen peroxide storage tank 1 and described atomizer 2.1, the OH that hydrogen peroxide catalytic unit 5 produces enters denitrating tower 2, gas approach 2.2 is provided with bottom denitrating tower 2, flue gas enters from gas approach 2.2 that denitrating tower 2 is reverse with OH from lower to upper to be mixed, described electrostatic denitrated acid separator 3 is connected with denitrating tower 2, from denitrating tower 2 top, mixing gas out enters electrostatic denitrated acid separator 3 and carries out gas-liquid separation, the liquid-phase outlet of electrostatic denitrated acid separator 3 takes over described nitric acid storage tank 4, the gaseous phase outlet of electrostatic denitrated acid separator 3 connects air.
Above-mentioned hydrogen peroxide denitrating technique, using hydrogen peroxide as denitration oxidant, by HTHP catalysis, makes hydrogen peroxide tend to be decomposed into hydroxy radical OH and HO 2, improve the oxid-reclamatiom effect to nitrogen oxide, improve denitration rate.It is simple that the denitrating system mated with denitrating technique has structure, easy to operate advantage.

Claims (1)

1. a hydrogen peroxide denitrating system, it is characterized in that: comprise the hydrogen peroxide storage tank set gradually, catalytic unit, denitrating tower, electrostatic nitric acid separator and nitric acid storage tank, described denitrating tower is configured with atomizer, connection pipeline between described hydrogen peroxide storage tank and described atomizer is provided with the catalytic unit heating hydrogen peroxide, hydrogen peroxide enters denitrating tower after being catalyzed into OH, gas approach is provided with bottom denitrating tower, flue gas enters denitrating tower from gas approach, and mix reverse with OH generates nitric acid from lower to upper, described electrostatic denitrated acid separator and denitrating tower are connected, from denitrating tower top, mixing gas out enters electrostatic denitrated acid separator and carries out gas-liquid separation, the liquid-phase outlet of electrostatic denitrated acid separator takes over described nitric acid storage tank, the gaseous phase outlet of electrostatic denitrated acid separator connects air.
CN201520966067.0U 2015-11-27 2015-11-27 Hydrogen peroxide solution deNOx systems Expired - Fee Related CN205216553U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520966067.0U CN205216553U (en) 2015-11-27 2015-11-27 Hydrogen peroxide solution deNOx systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520966067.0U CN205216553U (en) 2015-11-27 2015-11-27 Hydrogen peroxide solution deNOx systems

Publications (1)

Publication Number Publication Date
CN205216553U true CN205216553U (en) 2016-05-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107185373A (en) * 2017-06-12 2017-09-22 太仓运权化工防腐设备有限公司 A kind of denitration wastewater waste gas cleaning system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107185373A (en) * 2017-06-12 2017-09-22 太仓运权化工防腐设备有限公司 A kind of denitration wastewater waste gas cleaning system

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160511

Termination date: 20171127

CF01 Termination of patent right due to non-payment of annual fee