CN211987923U - Denitration system for flue gas denitration by using hydrogen peroxide and turbulent ball tower - Google Patents
Denitration system for flue gas denitration by using hydrogen peroxide and turbulent ball tower Download PDFInfo
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- CN211987923U CN211987923U CN202020070657.6U CN202020070657U CN211987923U CN 211987923 U CN211987923 U CN 211987923U CN 202020070657 U CN202020070657 U CN 202020070657U CN 211987923 U CN211987923 U CN 211987923U
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Abstract
The invention discloses a denitration system for denitration of flue gas by using hydrogen peroxide and turbulent ball tower, comprising turbulent ball tower, hydrogen peroxide supply system and soluble alkali solution supply system, wherein the soluble alkali solution supply system conveys the soluble alkali solution into a turbulent ball region of the turbulent ball tower through a liquid inlet pipe, the hydrogen peroxide supply system conveys the hydrogen peroxide into the turbulent ball region through a water inlet pipe, the flue gas enters the turbulent ball region from the lower part, and denitration is completed by the flue gas in the turbulent ball region.
Description
Technical Field
The invention relates to the technical field of flue gas denitration, in particular to a flue gas denitration system by using hydrogen peroxide and a turbulent ball tower.
Background
Coal-fired power generation, steel mill steelmaking and other processes taking coal and petroleum as heat sources are one of the main sources of nitrogen oxide increase in the environment. In order to reduce the influence on the environment, various manufacturers adopt various methods to reduce the emission of nitrogen oxides in the combustion tail gas (the flue gas), namely, the flue gas is subjected to denitration treatment. The existing flue gas denitration technology mainly comprises two main types, namely a catalytic reduction method and an oxidation method. For the catalytic reduction method, the required working temperature range is 400-450 ℃, and the emission temperature of the process flue gas is lower than the temperature, for example, the temperature of the boiler flue gas of a power plant, the sintering furnace flue gas of an iron and steel plant, and the flue gas of other boilers is usually between 80-150 ℃, so that extra energy consumption is needed to increase the temperature of the flue gas. In addition, because the reducing agent adopts ammonia gas, excessive reducing agent can be released into the atmosphere, secondary pollution can be caused finally, and moreover, the catalyst adopts precious metal and is easy to age. Therefore, the denitration cost by the reduction method is high; the oxidation methods disclosed in the prior art include ozone oxidation, sodium hypochlorite oxidation, etc., and the main disadvantages of these methods are poor removal effect of nitrogen oxides, too high cost, and great difficulty in treating the oxidation products (such as sodium hypochlorite method), thus having great disadvantages. In the existing flue gas denitration process, mature technology is rarely popularized and applied. The hydrogen peroxide has certain oxidizability and low price, and is a clean oxidant, so the hydrogen peroxide is applied to flue gas denitration and has a great prospect. However, experimental results show that the simple hydrogen peroxide has poor effect of oxidizing low-concentration NO in the flue gas. In the prior art, when hydrogen peroxide is applied to flue gas denitration, the measures adopted are that hydrogen peroxide is catalyzed at high temperature to generate hydroxyl radicals, and NO in flue gas is oxidized by the hydroxyl radicals. The publication No. CN106582277A discloses a denitration system and method using catalytic hydrogen peroxide, which uses titanium-based catalyst loaded with iron element to generate hydroxyl radical to oxidize NO at the temperature of 160-240 ℃. Patent publication No. CN106861392 discloses a process for removing nitrogen oxides based on hydrogen peroxide catalytic oxidation, wherein the adopted activating catalyst is oxides such as cerium dioxide, cobaltosic oxide, nickel oxide and the like, and the carrier is titanium dioxide. Hydroxyl radicals are generated to oxidize NO at the high temperature of 100 ℃ and 300 ℃. The above-mentioned technology has the problem that the applicable temperature is higher, so as to ensure the generation of hydroxyl free radical, thus extra energy consumption is needed to raise the flue gas temperature; noble metal oxide or noble metal is used as a catalyst, so that the cost is high; in addition, most of the hydrogen peroxide in the flue gas is directly decomposed into water and oxygen at a higher temperature instead of hydroxyl radicals, so that a large amount of hydrogen peroxide is additionally consumed, and the cost is increased.
Disclosure of Invention
In order to solve the technical problems, the invention provides a denitration system for flue gas denitration by using hydrogen peroxide and a turbulent ball tower, which comprises the following contents:
the utility model provides an utilize hydrogen peroxide solution and turbulent ball tower to carry out denitration system of flue gas denitration, including turbulent ball tower, hydrogen peroxide solution feed system, soluble alkali lye feed system passes through the turbulent ball district that soluble alkali lye is carried into turbulent ball tower through the feed liquor pipe, turbulent ball position in the backup pad with keep off between the net, settle a plurality of turbulent balls in the turbulent ball district, a serial communication port, hydrogen peroxide solution feed system carries hydrogen peroxide solution into turbulent ball district through the inlet tube, the flue gas gets into turbulent ball district from the below, flue gas and soluble alkali lye in turbulent ball district, hydrogen peroxide solution mixes, reaction and mass transfer.
Preferably, the denitration system is further provided with a mixer, the soluble alkali liquor supply system conveys the soluble alkali liquor into the mixer through a liquid inlet pipe, the hydrogen peroxide supply system also conveys the hydrogen peroxide into the mixer through a water inlet pipe, and the soluble alkali liquor and the hydrogen peroxide are mixed in the mixer and then conveyed into the turbulent ball area.
Preferably, the hydrogen peroxide is conveyed into the turbulent ball region under the wrapping of soluble alkali liquor.
The invention content is explained in the following with the prior art:
theoretical basis of the invention
1. Oxidation of NO:
the prior art shows that hydrogen peroxide by itself is not capable of oxidizing low concentrations of NO in flue gas (see US7628967B 2). Experiments also show that when the hydrogen peroxide is neutral or acidic, the hydrogen peroxide is very stable, and the flue gas containing NO with lower concentration is contacted with the acidic or neutral hydrogen peroxide, so that the NO cannot be oxidized by the hydrogen peroxide.
However, experiments show that in alkaline solution, hydrogen peroxide can be rapidly decomposed, and when flue gas containing low-concentration NO is mixed with alkaline solution and hydrogen peroxideWhen the combined liquid contacts, NO in the flue gas can be well removed. The reason for this is OH in the alkaline solution-The ions catalyze the decomposition of hydrogen peroxide:
H2O2 = H2O + O ——
O + O = O2 ——
O + O2 = O3 ——
o produced during the decomposition of hydrogen peroxide2O and O3Collectively referred to as active oxygen.
The active oxygen formed after catalysis plays a role in oxidizing NO:
O + NO → NO2 ——④
NO + O + NO → N2O3 ——⑤
O3 + NO →NO2 + O2 ——⑥
2NO + O2→ 2NO2(Low temperature) — c
In the above reaction, oxygen atoms have a larger oxidizing property than oxygen, and thus it is easy to oxidize nitrogen monoxide into nitrogen dioxide and other nitrogen oxides; in addition, the oxygen atom may be additionally bonded to O2Generation of O3And O is3Also has large oxidizing property, and can oxidize NO into NO2(ii) a Even if it is O2Since the oxidation reaction is generated in an aqueous solution of a soluble base and the temperature is low, NO can be oxidized into NO in the solution2.
Therefore, in alkaline solutions, the active oxygen is able to oxidize NO in the flue gas.
2. Absorption of high-valence nitrogen oxides:
in the presence of OH-In the presence of an environment in which NO is oxidized to NO2After then, NO2It is immediately absorbed by soluble alkali and converted into nitrate and nitrite.
The reaction formula is as follows:
3NO2+ 2OH-→ 2NO3 - + H2O + NO ——⑧
NO2 + NO + 2OH-→ 2NO2 - + H2O ——⑨
the oxidation and absorption are transient, i.e. NO is absorbed by the soluble base immediately after oxidation. In addition, except for NO2In addition, very small amounts of N in the flue gas2O3The nitrogen oxides with high valence also react with soluble alkali to produce nitrate, etc.
The whole denitration technology comprises the following steps:
in aqueous solution of soluble base, due to OH-The hydrogen peroxide decomposes active oxygen under the catalytic action of ions; the active oxygen oxidizes NO into high-valence nitrogen oxide which can be absorbed by alkali liquor or water; meanwhile, in the aqueous solution, the soluble alkali reacts with the high-valence nitrogen oxide immediately to generate nitrate or nitrous acid. Thereby completing the removal of the nitrogen oxides in the flue gas. That is, there are two types of reactions: catalytic decomposition of hydrogen peroxide and absorption of nitrogen oxides, and both reactions occur in aqueous solution. Moreover, the soluble lye serves two functions: catalysis and absorption.
The technical idea is obviously different from the technical idea of the prior art.
(II) turbulent ball tower
The turbulent ball tower is a place for realizing the technical idea in the denitration system. Except the hydrogen peroxide conveying system, the turbulent ball tower has other structure of available technology, including tower shell, support plate, light balls, baffle net, demister, etc. The working principle is as follows: the support plate (grid plate) is arranged in the tower shell, a certain amount of turbulent balls are placed on the support plate, a blocking net is arranged at a certain position above the support plate, and the space between the blocking net and the support plate is a turbulent ball area. In general, gas enters the turbulent ball region from the lower part through the support plate, liquid enters the turbulent ball region from the upper part or the side part, and the turbulent ball is suspended to form turbulent rotation and mutual collision under the interaction of various forces such as the impulsive force of high-speed gas flow, the buoyancy force of the liquid, the self gravity and the like, so that the gas and the liquid are closely contacted, and the actions such as mass transfer, reaction and the like are effectively carried out. The turbulent ball tower has the advantages of high gas speed, great treating capacity, homogeneous gas-liquid distribution, simple structure and less jamming.
The turbulent ball is a light small ball with the diameter of 20-38 mm, is made of plastics such as PVC, PE, PP and the like, and is hollow or solid. Stainless steel hollow spheres are also sometimes used. When the turbulent ball tower runs, the turbulent ball is in a motion state.
(III) Hydrogen peroxide solution supply System
The system comprises a hydrogen peroxide tank, a pressure pump, a valve, a water inlet pipe and the like. The function is to convey hydrogen peroxide to the turbulent ball region through the water inlet pipe. The supply amount of the hydrogen peroxide is specifically set according to the content of NO in the flue gas and the concentration of the hydrogen peroxide. According to the formula
R, r and b, NO and H2O2In a molar ratio of 1: relation of 1, i.e. an H2O2Can absorb 1 NO, but according to
Tetra, penta and nino, NO and H2O2Is less than 1:1, which can use a smaller amount of hydrogen peroxide. Considering the consumption of hydrogen peroxide and the formula
And (c) the influence of the chemical reaction is generally 1:1-5 in the process.
The hydrogen peroxide solution is called as hydrogen peroxide aqueous solution in the invention. Commercial products are available in the market, mainly 35wt% and 27.5 wt%. During denitration, industrial products can be directly used, and hydrogen peroxide can be diluted by water for use, such as to 20wt%, 15wt%, and even less than 10 wt%.
In a preferred scheme, hydrogen peroxide is input into the turbulent ball region in the presence of soluble alkali liquor, for example, a water inlet pipe is directly communicated with the alkali liquor in the turbulent ball region; when spraying, the soluble alkali liquor is sprayed above the hydrogen peroxide outlet, and the like. The reason is that, firstly, as mentioned above, hydrogen peroxide can be catalyzed to oxidize NO only in soluble alkali liquor; secondly, the flue gas temperature is high, if hydrogen peroxide fails to contact the flue gas in the presence of alkali liquor, decomposition occurs, and No. 1 is not oxidized.
(IV) soluble alkali liquor supply system
The soluble alkali in the present invention refers to a substance capable of ionizing hydroxide ions in water, and specifically includes substances capable of dissolving in water and ionizing hydroxide ions in water, such as sodium hydroxide, potassium hydroxide, calcium hydroxide, ammonia, alcohol amine, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, and urea.
The system comprises a lye tank, a pressure pump, a valve, a liquid inlet pipe and the like. The function is to convey soluble alkali liquor to the turbulent ball region. The alkali liquor flowing from the turbulent ball area to the alkali liquor tank has a larger pH value, so that the alkali liquor can be recycled. If the pH value is reduced, the catalysis and absorption effects are influenced, and soluble alkali can be added into the lye tank for adjustment. The reaction product may be periodically withdrawn from the lye tank. A better definition of this system is: a soluble alkali liquor supply and circulation system.
OH of soluble base-The ion concentration is measured as pH. Experiments show that when the pH value reaches 9, NO in the flue gas can be oxidized, and under the condition of NO change under other conditions, the larger the pH value is, the better the NO removal effect is. When the pH value is 11, the denitration rate of NO can exceed 70%, and when the pH value reaches 12, the denitration rate of NO exceeds 83%. The pH value is preferably in the range of 12 to 14 from the viewpoint of cost.
The soluble alkali liquor only plays a role of a catalyst in catalyzing the reaction of the hydrogen peroxide, and has NO consumption, so that theoretically, the consumption of the soluble alkali liquor can be determined according to high-valence nitrogen oxides, and the high-valence nitrogen oxides are mainly converted from NO, so the consumption of the soluble alkali liquor is determined by the amount of NO in the flue gas. However, considering the actual situation of the turbulent tower, that is, a certain height of liquid turbulent layer must be formed in the turbulent flow zone, the adding amount of the soluble alkali liquor is determined comprehensively according to the lift force of the flue gas, the height of the required turbulent layer and the gap rate of the supporting plates.
The influence factor of the height of the turbulent layer is more important than the content of nitrogen oxides in the flue gas, so that the adding amount of the soluble alkali liquor can be directly determined according to the actual operation requirement of the turbulent tower.
(V) mixer
In a preferred embodiment, a mixer is provided. The mixer has the function of providing a place for the uniform mixing of the hydrogen peroxide and the soluble alkali liquor. When the hydrogen peroxide and the soluble alkali liquor are separately injected into the turbulent ball region, the hydrogen peroxide is injected into the alkali liquor in the turbulent ball region, which inevitably causes uneven local mixing of the hydrogen peroxide and the alkali liquor, thereby being not beneficial to removing nitrogen oxides in the flue gas. The mixer is a closed cavity connected with a hydrogen peroxide inlet pipe and a soluble alkali liquor inlet pipe. Hydrogen peroxide and soluble alkali liquor respectively enter the mixer through the water inlet pipe and the soluble alkali liquor inlet pipe, are mixed in the mixer and are then conveyed to the turbulent ball area. Hydrogen peroxide in alkali solution OH in a mixer-Under the action of (3), the catalyst begins to decompose active oxygen.
The mixer can be a single container or a section of connecting pipe; either outside or inside the turbulent ball tower, requires that the time from the mixer to the zone of turbulence be no more than 10 seconds, preferably no more than 5 seconds. The reason is that OH-The reaction for catalyzing the decomposition of hydrogen peroxide is immediate, and if the time is too long, more free O is combined into O2Resulting in a weakened oxidizing effect. Thus, the optimal location for the mixer is near the liquid outlet so that the two liquids can be mixed immediately into the turbulent zone for optimal oxidation.
Figure 3 shows two structural forms of the liquid mixer, wherein hydrogen peroxide and soluble alkali liquor respectively enter from an inlet and flow out from an outlet after being mixed.
The invention has the beneficial effects that:
1. the hydrogen peroxide is used for flue gas denitration, so that the cost is low and the efficiency is high;
2. the NO is oxidized by catalyzing hydrogen peroxide with alkali liquor, and the oxidation product is absorbed by the alkali liquor, so that NO additional catalyst is needed, the cost is low, and unexpected technical effects are achieved.
3. The range of applicable flue gas temperature is large, the flue gas is particularly suitable for low-temperature flue gas, and the lower the flue gas temperature is, the better the denitration effect is; compared with the prior art, the flue gas does not need to be heated, and the method has great economic benefit and social benefit.
Drawings
FIG. 1: schematic structural diagram of example 1.
FIG. 2: the structure of embodiment 2 is schematically shown.
FIG. 3: two structural forms of the mixer.
Detailed Description
Example 1
The invention is described with reference to the accompanying figure 1:
the turbulent ball tower is a cylinder with the diameter of 0.8m, the height of the tower is 5m, the wall thickness is 8mm, and the turbulent ball tower is made of 304L stainless steel. The support plate 1 is arranged at a position 2.5 meters away from the bottom of the tower shell. The support plate 1 is a circular grid plate structure, the gap spacing is 15mm, and the material is 304 stainless steel. A baffle net 2 is arranged 1.5m above a bearing plate 1, the diameter of a hole of the baffle net 2 is 20mm, the space between the bearing plate 1 and the baffle net 2 is a turbulent ball region 3, a turbulent ball 4 is placed in the turbulent ball region 3, the turbulent ball 4 is a 34mm hollow PE ball, and the height of the turbulent ball layer is about 0.4m when the turbulent ball is static.
The flue gas inlet 5 is arranged at a position 1.5m away from the bottom of the turbulent ball tower, the flue gas outlet 6 is arranged at the top of the tower shell, and the bottom space of the turbulent ball tower is used as a lye tank 7. The hydrogen peroxide inlet pipe 8 is connected with a hydrogen peroxide tank 9 outside the turbulent ball tower, and a booster pump 10-a and a flow regulating valve 11-a are also arranged on the pipeline. A conical solid shower nozzle 12 is arranged at the tail end of the water inlet pipe 8, the shower nozzle 12 is close to the turbulent ball region 3 and is positioned above the turbulent ball region 3, and hydrogen peroxide is sprayed to the turbulent ball region 3 through the shower nozzle 12; a booster pump 10-b and a flow regulating valve 11-b are also arranged on the pipeline of the liquid inlet pipe 13 of the soluble alkali liquor. The end of the liquid inlet pipe 13 is also connected with a shower nozzle 14, the shower nozzle 14 is positioned above the shower nozzle 12, and the shower nozzle 14 sprays the soluble alkali liquid to the turbulent ball zone 3.
The flue gas is the sintering flue gas of a sintering workshop of a certain steel mill. The initial flue gas parameters are: the temperature of the smoke is 125-143 ℃, the humidity of the smoke is 0.01-0.04 percent, and the NO content is 181-197mg/m3Oxygen content is 14-16%, and flue gas flow is 1800m3/h。
The concentration of the hydrogen peroxide is 35 wt%. The soluble alkali is NaOH, and is adjusted to be an aqueous solution with pH value of 14 and then injected into the lye tank 7.
The flue gas enters the turbulent ball tower through the flue gas inlet 5, rises in the tower, and enters the turbulent ball area 3 through the gap of the support plate 1; opening a booster pump 10-b and a flow regulating valve 11-b, conveying soluble alkali liquor from an alkali liquor tank 7 to a spray head 14 through a liquor inlet pipe 13, and spraying the soluble alkali liquor to the turbulent flow zone 3; and opening a flow regulating valve 11-a and a booster pump 10-a of a hydrogen peroxide pipeline, and conveying hydrogen peroxide from a hydrogen peroxide tank 9 to a spray head 12 through a water inlet pipe 8 and spraying the hydrogen peroxide to the turbulent flow zone 3. The flow of the hydrogen peroxide is adjusted by the adjusting valve 11-a, so that the hydrogen peroxide is uniformly input, and the input quantity per hour is not lower than 3 kg; the flow of the alkali liquor is adjusted by the adjusting valve 11-b, so that the height of the liquid layer in the turbulent flow zone 3 is about 0.5 m.
In the turbulent ball region 3, a turbulent flow is formed under the combined action of the flue gas and the liquid, the contact, reaction and mass transfer among the flue gas, the hydrogen peroxide and the alkali liquor are completed, and the turbulent ball 4 irregularly moves in the turbulent flow region 3, so that the contact and mass transfer effects are enhanced.
Measured at the flue gas outlet 6 of the turbulent ball tower, the NO content is 23-31mg/m3The total content of nitrogen oxides is 37-44mg/m3。
Example 2
The invention is described with reference to fig. 2:
the turbulent ball tower is a cylinder with the diameter of 0.8m, the height of the tower is 5m, the wall thickness is 8mm, and the turbulent ball tower is made of 304L stainless steel. The support plate 1 is arranged at a position 2.5 meters away from the bottom of the tower shell. The support plate 1 is a circular grid plate structure, the gap spacing is 15mm, and the material is 304 stainless steel. A baffle net 2 is arranged 1.5m above a bearing plate 1, the diameter of a hole of the baffle net 2 is 20mm, the space between the bearing plate 1 and the baffle net 2 is a turbulent ball region 3, a turbulent ball 4 is placed in the turbulent ball 3, the turbulent ball 4 is a 34mm hollow PE ball, and the height of the turbulent ball layer is about 0.4m when the turbulent ball is static.
The flue gas inlet 5 is arranged at a position 1.5m away from the bottom of the turbulent ball tower, the flue gas outlet 6 is arranged at the top of the tower shell, and the bottom space of the turbulent ball tower is used as a lye tank 7. The hydrogen peroxide inlet pipe 8 is connected with a hydrogen peroxide tank 9 outside the turbulent ball tower, and a booster pump 10-a and a flow regulating valve 11-a are also arranged on the pipeline.
The tail end of the water inlet pipe 8 is connected to a mixer 15, the mixer 15 is a 316 steel spherical shell with the diameter of 200mm and the thickness of 4mm, and the mixer 15 is arranged above the baffle net 2; the end of the inlet pipe 13 is also connected to a mixer 15, which mixer 15 is connected to a shower head 17 via an outlet pipe 16, which shower head 17 is located in a position above the turbulent ball zone 3. The hydrogen peroxide and the soluble alkali liquor enter the mixer 15 respectively, and then are conveyed to the spray head 17 together through the liquid outlet pipe 16 and are sprayed to the turbulent ball region 3.
The flue gas is the sintering flue gas of a sintering workshop of a certain steel mill. The initial flue gas parameters are: the temperature of the smoke is 125-143 ℃, the humidity of the smoke is 0.01-0.04 percent, and the NO content is 181-197mg/m3Oxygen content is 14-16%, and flue gas flow is 1800m3/h。
The concentration of the hydrogen peroxide is 35 wt%. The soluble alkali is NaOH, and is adjusted to be an aqueous solution with pH value of 14 and then injected into the lye tank 7.
The flue gas enters the turbulent ball tower through the flue gas inlet 5, rises in the tower, and enters the turbulent ball area 3 through the gap of the support plate 1; opening a booster pump 10-b and a flow regulating valve 11-b, and conveying soluble alkali liquor from an alkali liquor tank 7 to a mixer 15 through a liquor inlet pipe 13; and opening a flow regulating valve 11-a and a booster pump 10-a of a hydrogen peroxide pipeline, conveying hydrogen peroxide from a hydrogen peroxide tank 9 to a mixer 15 through a water inlet pipe 8, and spraying liquid in the mixer 15 to the turbulent flow zone 3 through a spray head 17 through a liquid outlet pipe 16. The flow of the hydrogen peroxide is adjusted by the adjusting valve 11-a, so that the hydrogen peroxide is uniformly input, and the input quantity per hour is not lower than 3 kg; the flow of the alkali liquor is adjusted by the adjusting valve 11-b, so that the height of the liquid layer in the turbulent flow zone 3 is about 0.5 m.
In the turbulent ball region 3, a turbulent flow is formed under the combined action of the flue gas and the liquid, the contact, reaction and mass transfer among the flue gas, the hydrogen peroxide and the alkali liquor are completed, and the turbulent ball 4 irregularly moves in the turbulent flow region 3, so that the contact and mass transfer effects are enhanced.
Measured at the flue gas outlet 6 of the turbulent ball tower, the NO content is 17-25mg/m3The total content of nitrogen oxides is 29-37mg/m3。
Claims (3)
1. The utility model provides an utilize hydrogen peroxide solution and turbulent ball tower to carry out deNOx systems of flue gas denitration, including turbulent ball tower, hydrogen peroxide solution feed system, soluble alkali lye feed system is carried into the turbulent ball district of turbulent ball tower through the feed liquor pipe, settle a plurality of turbulent balls in the turbulent ball district, a serial communication port, hydrogen peroxide solution feed system carries hydrogen peroxide solution into the turbulent ball district through the inlet tube, the flue gas gets into the turbulent ball district from the below, flue gas and soluble alkali lye in the turbulent ball district, hydrogen peroxide solution intermix, reaction and mass transfer.
2. The denitration system for flue gas denitration by using hydrogen peroxide and the turbulent ball tower as claimed in claim 1, wherein a mixer is further provided, the soluble alkali solution supply system firstly conveys the soluble alkali solution into the mixer through the liquid inlet pipe, the hydrogen peroxide supply system also conveys the hydrogen peroxide into the mixer through the water inlet pipe, and the soluble alkali solution and the hydrogen peroxide are mixed in the mixer and then conveyed into the turbulent ball region.
3. The denitration system for flue gas denitration by using hydrogen peroxide and the turbulent ball tower as claimed in claim 1, wherein the hydrogen peroxide is transported into the turbulent ball zone under the wrapping of soluble alkali liquor.
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