CN103432891A - Desulfurization and denitrification system and method - Google Patents
Desulfurization and denitrification system and method Download PDFInfo
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- CN103432891A CN103432891A CN2013104379597A CN201310437959A CN103432891A CN 103432891 A CN103432891 A CN 103432891A CN 2013104379597 A CN2013104379597 A CN 2013104379597A CN 201310437959 A CN201310437959 A CN 201310437959A CN 103432891 A CN103432891 A CN 103432891A
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Abstract
The invention provides a desulfurization and denitrification system comprising a smoke generating device, a dust collector and an absorption tower connected with the dust collector through a second flue, wherein the top of the absorption tower is connected with a chimney, and the bottom of the absorption tower is connected with a circulating pump; the second flue is internally provided with a hydrogen peroxide high-temperature decomposition system comprising a gas mixing device and a heating device, wherein the gas mixing device is composed of at least three layers of pipe fittings, each layer of pipe fittings includes a plurality of pipe fittings, and the plurality of pipe fittings are arranged horizontally; based on the smoke entering direction, the heating device is arranged inside all the pipe fittings at the even layer of the gas mixing device; and the hydrogen peroxide high-temperature decomposition system is connected with a hydrogen peroxide storage tank through a pipeline, and an inlet of the hydrogen peroxide high-temperature decomposition system is arranged between the pipe fittings at the odd layer and the even layer of the gas mixing device. According to the invention, the second flue is internally provided with the hydrogen peroxide high-temperature decomposition system, so that the activity and utilization ratio of hydrogen peroxide are increased, and the desulfurization and denitrification efficiencies are high.
Description
Technical field
The present invention relates to the desulphurization denitration technical field, relate in particular to a kind of system for desulfuration and denitration and method.
Background technology
The nitrogen oxide and the oxysulfide that in the burning of fossil fuel and Chemical Manufacture, produce have caused serious harm to atmospheric environment, the desulfur technology at present air contaminant treatment generally adopted has several classes such as dry method, semidry method and wet method, but these technology seem helpless aspect denitration.At present, the more denitration technology of industrial employing is selective catalytic reduction (SCR).But there is following problem in the method: the investment and operating cost is high, floor space is large; Reducing agent liquefied ammonia used is national secondary dangerous material, and management maintenance is strict; The solid catalyst refuse difficult treatment produced; During to old boiler improvement, need transformation flue and air preheater, thereby cause the problem that difficulty is large and expense is high.
Wet Flue Gas Desulfurization Technology (WFGD) is most widely used desulfur technology on our times, its desulfuration efficiency is high, and the good gas-liquid mass transfer of wet scrubber tower is a kind of potential advantages for the absorption of nitrogen oxide, therefore, exploitation wet process of FGD denitrification integral process has wide development space.
Aspect wet denitration, oxidation absorption process denitration technology has overcome some deficiency of SCR technique, becomes the focus of research and development.And, in numerous oxidants, hydrogen peroxide is quite favored because of cheap; But hydrogen peroxide activity at low temperatures is not high, be not enough to the lower valency nitrogen oxide in flue gas is oxidized to high valence state nitrogen oxide soluble in water, need to be excited the generation oxyradical to its heating.But, because hydrogen peroxide high temperature excites the oxyradical time-to-live of rear generation extremely short, after needing to produce, immediate response could effectively utilize.
The United States Patent (USP) that publication number is US6793903B1 discloses a kind of hydrogen peroxide pyrolytic system and method, and the method is first preheating before hydrogen peroxide enters decomposer, then in decomposer, adopts special heating plate to excite it; The difference of the application and above-mentioned United States Patent (USP) is: the hydrogen peroxide preheating device is not set, and the application's hydrogen peroxide pyrolytic system has been introduced the venturi design concept, in the process that adds the thermal excitation hydrogen peroxide, system itself has the flue gas immixture, has solved oxyradical and has produced the i.e. problem of reaction.The Chinese patent that publication number is CN102327735A disclose a kind of based on the hydrogen peroxide effect to the flue gas and desulfurizing and denitrifying system and method, this system and method aspect the peroxide heating system with the described hydrogen peroxide pyrolytic of the application system essential distinction is being arranged.
Summary of the invention
The technical problem that the present invention solves is to provide that a kind of denitrification efficiency is high, investment and low system for desulfuration and denitration and the method for operating cost.
In view of this, the invention provides a kind of system for desulfuration and denitration, comprise the flue gas generation device, the deduster be connected with the flue gas generation device by the first flue, the absorption tower be connected with described deduster by the second flue, the top on described absorption tower is connected with chimney, bottom is connected with circulating pump, the inside of described the second flue is provided with hydrogen peroxide pyrolytic system, described hydrogen peroxide pyrolytic system comprises gas mixing device and heater, described gas mixing device is comprised of at least three layers of pipe fitting, and every layer comprises multiple tubing element, and described multiple tubing element is horizontal; The telegoniometer entered from flue gas, described heater is arranged at the inside of described each pipe fitting of gas mixing device even level; Described hydrogen peroxide pyrolytic system is connected by pipeline with the hydrogen peroxide storage tank, and the entrance of described hydrogen peroxide pyrolytic system is arranged between the odd-level pipe fitting and even level pipe fitting of described gas mixing device.
Preferably, the even level pipe fitting of described gas mixing device is under gap between each pipe fitting of odd-level.
Preferably, described pipe fitting is pipe, and the diameter of described pipe is 25mm～159mm, and the distance of adjacent pipe is 10mm～140mm, and the diameter of described pipe is greater than the distance of described adjacent pipe.
Preferably, described pipe fitting is square tube, and the catercorner length of described square tube is 25mm～159mm, and the distance of adjacent square tube is 10mm～140mm, and described catercorner length is greater than the distance of described adjacent square tube.
Preferably, described heater is one or more in thermocouple, far infrared, high-temperature flue gas and high-temperature steam.
Preferably, bottom, described absorption tower is provided with oxidation fan.
Preferably, comprise alkaline solution and auxiliary agent in described absorption tower, described alkaline solution is one or more in NaOH, calcium hydroxide, calcium oxide, magnesia, calcium carbonate, ammoniacal liquor and seawater, and described auxiliary agent is organic solvent.
The present invention also provides the desulfurization denitration method that utilizes described system for desulfuration and denitration, comprises the following steps:
A) adopt heater by the even level pipe heating of gas mixing device;
B) hydrogenperoxide steam generator in the hydrogen peroxide storage tank is ejected into to the even level pipe fitting surface after heating, after decomposing, with the flue gas after the interior dedusting of the second flue, mixes and reacts;
C) reacted flue gas is entered to absorption tower and washed, the flue gas after washing is discharge after dehumidifying.
Preferably, the temperature heated described in step a) is 300～600 ℃.
Preferably, after step c), also comprise:
By the absorption liquid iterative cycles after described washing, the salt concentration in absorption liquid reaches 30wt%～40wt%, and the self-absorption tower bottom is discharged, and carries out successively liquid dedusting, condensing crystallizing and drying.
The invention provides a kind of system for desulfuration and denitration, the present invention by arranging hydrogen peroxide pyrolytic system in the second flue of system for desulfuration and denitration, the hydrogenperoxide steam generator sprayed from the hydrogen peroxide storage tank is heated by the heater in hydrogen peroxide pyrolytic system, hydrogen peroxide is decomposed and produce oxyradical, flue gas mixes and reacts with the oxyradical that hydrogen peroxide decomposes by the gas mixing device of hydrogen peroxide pyrolytic system simultaneously, flue gas middle or low price state nitrogen oxide is oxidized to high valence state nitride soluble in water, oxidizing sulfur dioxide becomes sulfur trioxide, thereby reach the purpose of desulphurization denitration.The present invention is by hydrogen peroxide pyrolytic system is set in the second flue, and it has flue gas concurrently and all mixes up and use and the hydrogen peroxide excitation, and in time, fully, the hydrogen peroxide utilization rate is high, and desulfurization removing nitric efficiency is high in reaction.Experimental result shows, desulfuration efficiency of the present invention can reach more than 95%, and nitric efficiency is more than 80%.In addition, this system for desulfuration and denitration investment and operating cost are all lower than selective catalytic reduction+Wet Flue Gas Desulfurization Technology; Floor space is little, easily realizes desulfurization and denitrification integral; Applied range, be convenient to promote.
The accompanying drawing explanation
The schematic diagram that Fig. 1 is system for desulfuration and denitration of the present invention;
The schematic diagram that Fig. 2 is the embodiment of the present invention 1～3 system for desulfuration and denitration;
Vertical sectional structure schematic diagram that Fig. 3 is hydrogen peroxide pyrolytic system of the present invention;
Vertical sectional structure schematic diagram that Fig. 4 is hydrogen peroxide pyrolytic system of the present invention;
Fig. 5 be in Fig. 3, Fig. 4 flue A-A to the cross section structure schematic diagram.
The specific embodiment
In order further to understand the present invention, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should be appreciated that these are described is for further illustrating the features and advantages of the present invention, rather than limiting to the claimed invention.
The embodiment of the invention discloses a kind of system for desulfuration and denitration, comprise the flue gas generation device, the deduster be connected with the flue gas generation device by the first flue, the absorption tower be connected with described deduster by the second flue, the top on described absorption tower is connected with chimney, bottom is connected with circulating pump, the inside of described the second flue is provided with hydrogen peroxide pyrolytic system, described hydrogen peroxide pyrolytic system comprises gas mixing device and heater, described gas mixing device is comprised of at least three layers of pipe fitting, every layer comprises multiple tubing element, and described multiple tubing element is horizontal; The telegoniometer entered from flue gas, described heater is arranged at the inside of described each pipe fitting of gas mixing device even level; Described hydrogen peroxide pyrolytic system is connected by pipeline with the hydrogen peroxide storage tank, and the entrance of described hydrogen peroxide pyrolytic system is arranged between the odd-level pipe fitting and even level pipe fitting of described gas mixing device.
As shown in Figure 1, the schematic diagram that Fig. 1 is system for desulfuration and denitration, in figure, 1 is the flue gas generation device, 2 is deduster, 3 is absorption tower, and 4 is chimney, and 5 is liquid dust arrester, 6 is concentration and crystallization device, 7 for dry, pack or dump device, 8 is the hydrogen peroxide storage tank, 9 is hydrogen peroxide pyrolytic system, 10 is oxidation fan, and 11 is circulating pump.
As shown in Fig. 3, Fig. 4 and Fig. 5, vertical sectional structure schematic diagram that Fig. 3 is hydrogen peroxide pyrolytic system, vertical sectional structure schematic diagram that Fig. 4 is hydrogen peroxide pyrolytic system, Fig. 5 be in Fig. 3, Fig. 4 flue A-A to the cross section structure schematic diagram, in figure, 12 is heater, 13 is pipe fitting, and in Fig. 3, pipe fitting 13 is pipe, and in Fig. 4, pipe fitting 13 is square tube.
The present invention arranges hydrogen peroxide pyrolytic system 9 by the second flue in system for desulfuration and denitration, make to be heated and decomposed into the generation oxyradical from the hydrogenperoxide steam generator in the hydrogen peroxide storage tank, the oxyradical produced mixes and reacts with the flue gas by the venturi member that consists of gas mixing device in the second flue, flue gas middle or low price state nitrogen oxide is oxidized to high valence state nitrogen oxide soluble in water, oxidizing sulfur dioxide becomes sulfur trioxide, thereby reaches the purpose of desulphurization denitration.
According to the present invention, the flue gas produced by flue gas generation device 1 enters deduster 2 through described the first flue, and the large particulate matters such as dust in flue gas are removed.Flue gas through deduster enters the second flue.
Described hydrogen peroxide pyrolytic system 9 is arranged at the second flue inside, and described hydrogen peroxide pyrolytic system 9 comprises gas mixing device and heater 12; Wherein said gas mixing device is comprised of many pipe fittings arranged side by side 13 by least three layers.Gas mixing device of the present invention be when air-flow by the time can produce the venturi member of Venturi effect.Enter the telegoniometer of the second flue from flue gas, pipe fitting is designated as odd-level pipe fitting and even level pipe fitting.In order to make described gas mixing device there is Venturi effect preferably, the oxyradical that makes flue gas add thermal decomposition with hydrogen peroxide mixes and reacts rapidly, reduce as far as possible the flue gas short circuit phenomenon, be that oxyradical that flue gas does not decompose with hydrogen peroxide does not react just and drains, the even level pipe fitting of described gas mixing device be positioned at odd-level pipe fitting gap under.
The pipe fitting of described gas mixing device can be square tube, can be also pipe, and the present invention has no particular limits.But can form Venturi effect to a certain degree in order to ensure gas mixing device; and make flue gas fully contact, mix and react with the oxyradical that hydrogen peroxide decomposes; the present invention preferably defines the size of gas mixing device pipe fitting; when described pipe fitting is pipe; the diameter of pipe is preferably 25mm～159mm; when described pipe fitting is square tube, the catercorner length of described square tube is 25mm～159mm.In order to strengthen Venturi effect, and the resistance that level pipe fitting arranged side by side forms can not be too large, if the pipe fitting of described gas mixing device is pipe, the distance of adjacent pipe is preferably 10mm～140mm, and the diameter of described pipe is greater than the distance of described adjacent pipe; If described pipe fitting is square tube, the distance of adjacent square tube is preferably 10mm～140mm, and described catercorner length is greater than the distance of described adjacent square tube.Gas mixing device of the present invention at least arranges three layers of horizontal pipe fitting, ground floor pipe fitting arranged side by side can guarantee that flue gas enters hydrogen peroxide pyrolytic system and directly rushes at the heating pipe fitting and react with the oxyradical after hydrogen peroxide decomposes, and second layer pipe fitting arranged side by side is the carrying out of heater being installed and maintaining said process; The 3rd layer of pipe fitting arranged side by side is a strengthening process, promotes the nitrogen oxide in flue gas and the oxyradical hybrid reaction that oxysulfide is sufficient and hydrogen peroxide decomposes.The pipe fitting number of plies of gas mixing device of the present invention is preferably greater than 3 layers, more preferably 5 layers.
9 effects that arrange of the pyrolytic of hydrogen peroxide described in the present invention system are to make flue gas to react with the oxyradical that hydrogen peroxide decomposes.And the oxyradical that hydrogen peroxide decomposes is realized by heater 12.Described heater 12 can be one or more in thermocouple, far infrared, high-temperature flue gas and high-temperature steam.The even level pipe fitting surface of the hydrogenperoxide steam generator provided from the hydrogen peroxide storage tank along duct injection to hydrogen peroxide pyrolytic system 9, hydrogenperoxide steam generator is in the situation that oxyradical is resolved in heating, mix with the flue gas through in hydrogen peroxide pyrolytic system 9, thereby complete the desulphurization denitration process.In order to make fully hybrid reaction of flue gas and oxyradical, as preferred version, be connected with supply pump on described hydrogen peroxide storage tank 8, be connected with check valve on described supply pump, be connected with control valve on described check valve, be connected with flowmeter and atomizer on described control valve, described atomizer is arranged in described hydrogen peroxide pyrolytic system 9, and the center of described atomizer is corresponding with the center line of described gas mixing device even level pipe fitting.
Flue gas after the oxidation of hydrogen peroxide pyrolytic system enters absorption tower 3, and nitrogen oxide and oxysulfide after oxidized in flue gas carry out washing absorption by the interior cleaning solution in absorption tower 3, and the flue gas after washing enters atmosphere through dehumidifying from chimney 4.The bottom on described absorption tower is connected with circulating pump 11, on described circulating pump 11, is connected with atomizer, and described cleaning solution is injected in absorption tower from atomizer, and the flue gas after oxidation is washed.The bottom on described absorption tower 3 also is provided with liquid dust arrester 5, and the outlet of described liquid dust arrester 5 is connected with the entrance of concentration and crystallization device 6, and the outlet of described concentration and crystallization device 6 is connected with entrance dry, that pack or dump device 7.The bottom liquid on described absorption tower 3 absorbs through iterative cycles, after the salt concentration in absorption liquid reaches 30wt%～40wt%, discharges and carries out successively liquid dedusting, condensing crystallizing and drying from the bottom, absorption tower, then packed or dump.Bottom, absorption tower of the present invention also preferably is provided with oxidation fan 10, inferior sulfate radical and nitrite anions that described oxidation fan 10 is not oxidized for the forced oxidation absorption liquid.
The invention provides a kind of system for desulfuration and denitration, the present invention by arranging hydrogen peroxide pyrolytic system in the second flue of system for desulfuration and denitration, the hydrogenperoxide steam generator sprayed from the hydrogen peroxide storage tank is heated by the heater in hydrogen peroxide pyrolytic system, hydrogen peroxide is decomposed and produce oxyradical, flue gas mixes and reacts with the oxyradical that hydrogen peroxide decomposes by the gas mixing device of hydrogen peroxide pyrolytic system simultaneously, flue gas middle or low price state nitrogen oxide is oxidized to high valence state nitride soluble in water, oxidizing sulfur dioxide becomes sulfur trioxide, thereby reach the purpose of desulphurization denitration.The present invention is by hydrogen peroxide pyrolytic system is set in the second flue, and it has flue gas concurrently and all mixes up for the hydrogen peroxide excitation, and in time, fully, the hydrogen peroxide utilization rate is high, and desulfurization removing nitric efficiency is high in reaction.Experimental result shows, desulfuration efficiency of the present invention can reach more than 95%, and nitric efficiency is more than 80%.In addition, this system for desulfuration and denitration investment and operating cost are all lower than WFGD+SCR; Floor space is little, easily realizes desulfurization and denitrification integral; Applied range, be convenient to promote.
The present invention also provides a kind of desulfurization denitration method that utilizes above-mentioned system for desulfuration and denitration, comprises the following steps:
A) adopt heater by the even level pipe heating of gas mixing device;
B) hydrogenperoxide steam generator in the hydrogen peroxide storage tank is ejected into to the even level pipe fitting surface after heating, the flue gas after decomposing after the dedusting interior with the second flue mixes and reacts;
C) reacted flue gas is entered to absorption tower and washed, the flue gas after washing is discharge after dehumidifying.
According to the present invention, in order to make the oxyradical hybrid reaction after flue gas and hydrogen peroxide add thermal decomposition, the present invention adopts the heater of hydrogen peroxide pyrolytic system 9 by gas mixing device even level pipe heating, can resolve into oxyradical while making hydrogen peroxide in entering the second flue, the temperature of described heating is preferably 300～600 ℃, and what this temperature value was enough to guarantee hydrogen peroxide excites decomposition fully.
After the even level pipe heating by hydrogen peroxide pyrolytic system 9, hydrogenperoxide steam generator is sprayed into the even level pipe fitting surface of the hydrogen peroxide pyrolytic system 9 of the second flue from the hydrogen peroxide storage tank, make hydrogen peroxide resolve into oxyradical, flue gas after the deduster dedusting is entered to the second flue simultaneously, flue gas after dedusting mixes and reacts with the oxyradical that hydrogen peroxide decomposes through the odd-level pipe fitting of described hydrogen peroxide pyrolytic system 9 gas mixing devices, the lower valency nitrogen oxide in flue gas is oxidized to high valence state nitrogen oxide soluble in water, oxidizing sulfur dioxide becomes sulfur trioxide.
According to the present invention, enter after flue gas is oxidized in ， absorption tower, absorption tower and be washed the liquid washing absorption, the flue gas after washing through the dehumidifying after from smoke stack emission.Described cleaning solution is preferably the mixture of alkaline solution and auxiliary agent; Described alkaline solution is preferably one or more in NaOH, calcium hydroxide, calcium oxide, magnesia, calcium carbonate and ammoniacal liquor.After the cleaning solution repetitive cycling, when salt concentration wherein reaches 30wt%～40wt%, cleaning solution is discharged from the bottom of scrubbing tower, carries out successively liquid dedusting, condensing crystallizing and drying, then is packed or dump.
In order further to understand the present invention, below in conjunction with embodiment, system for desulfuration and denitration provided by the invention is elaborated, protection scope of the present invention is not limited by the following examples.
As shown in Figure 2, flue gas generation device 1 is boiler to system for desulfuration and denitration described in the present embodiment, and absorption tower 3 is spray column, and diameter is 1.2m, is highly 18m; Hydrogen peroxide pyrolytic system 9 is arranged on the flue between deduster 2 and absorption tower 3, and pipe fitting is pipe, and the venturi member arranges 5 layers, as shown in Figure 3, adopts thermocouple heating even level pipe fitting.Carry out desulphurization denitration when operation at flue gas, adopt heater by the even level pipe heating of gas mixing device to 500 ℃ of temperature; Hydrogenperoxide steam generator metering in the hydrogen peroxide storage tank is ejected on the surface that is heated pipe fitting by atomizer after extracting, the hydrogen peroxide straying quatity is 1.36 times of nitrogen oxide molal quantity, it is decomposed at 500 ℃ of temperature and produce oxyradical, the oxyradical produced mixes and reacts with the flue gas in flue, flue gas middle or low price state nitrogen oxide is oxidized to high valence state nitrogen oxide soluble in water, and oxidizing sulfur dioxide becomes sulfur trioxide; Flue gas after oxidation enters absorption tower, and by the mixed liquor washing absorption of the NaOH in tower and auxiliary agent, the flue gas after purification enters atmosphere through chimney; Enter cesspool after the absorption liquid iterative cycles.
Adopt the Test350 flue gas analyzer to measure exhaust gas components: the flue gas generation device produces SO in flue gas
2for 350ppm, NO
xfor 165ppm; SO in absorption tower outlet flue gas after desulphurization denitration
2for 0ppm, NO is 10ppm, NO
xfor 25ppm.
Flue gas and desulfurizing and denitrifying system based on the hydrogen peroxide effect is with example 1, and difference is, even level pipe fitting surface temperature is 490 ℃.Adopt the Test350 flue gas analyzer to measure exhaust gas components: the flue gas generation device produces SO in flue gas
2for 345ppm, NO
xfor 172ppm; SO in absorption tower outlet flue gas after desulphurization denitration
2for 2ppm, NO is 16ppm, NO
xfor 33ppm.
Flue gas and desulfurizing and denitrifying system based on the hydrogen peroxide effect is with example 1, and difference is, the hydrogen peroxide straying quatity is 1.1 times of nitrogen oxide molal quantity.Measure exhaust gas components with the Test350 flue gas analyzer: the flue gas generation device produces SO in flue gas
2for 365ppm, NO
xfor 168ppm; SO in absorption tower outlet flue gas after desulphurization denitration
2for 2ppm, NO is 12ppm, NO
xfor 28ppm.
The explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.Multiple modification to these embodiment will be apparent for those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, realization in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a system for desulfuration and denitration, comprise the flue gas generation device, the deduster be connected with the flue gas generation device by the first flue, the absorption tower be connected with described deduster by the second flue, the top on described absorption tower is connected with chimney, bottom is connected with circulating pump, it is characterized in that, the inside of described the second flue is provided with hydrogen peroxide pyrolytic system, described hydrogen peroxide pyrolytic system comprises gas mixing device and heater, described gas mixing device is comprised of at least three layers of pipe fitting, and every layer comprises multiple tubing element, and described multiple tubing element is horizontal; The telegoniometer entered from flue gas, described heater is arranged at the inside of described each pipe fitting of gas mixing device even level; Described hydrogen peroxide pyrolytic system is connected by pipeline with the hydrogen peroxide storage tank, and the entrance of described hydrogen peroxide pyrolytic system is arranged between the odd-level pipe fitting and even level pipe fitting of described gas mixing device.
2. system for desulfuration and denitration according to claim 1, is characterized in that, the even level pipe fitting of described gas mixing device is under gap between each pipe fitting of odd-level.
3. system for desulfuration and denitration according to claim 1, is characterized in that, described pipe fitting is pipe, and the diameter of described pipe is 25mm～159mm, and the distance of adjacent pipe is 10mm～140mm, and the diameter of described pipe is greater than the distance of described adjacent pipe.
4. system for desulfuration and denitration according to claim 1, it is characterized in that, described pipe fitting is square tube, and the catercorner length of described square tube is 25mm～159mm, the distance of adjacent square tube is 10mm～140mm, and described catercorner length is greater than the distance of described adjacent square tube.
5. system for desulfuration and denitration according to claim 1, is characterized in that, described heater is one or more in thermocouple, far infrared, high-temperature flue gas and high-temperature steam.
6. system for desulfuration and denitration according to claim 1, is characterized in that, bottom, described absorption tower is provided with oxidation fan.
7. system for desulfuration and denitration according to claim 1, it is characterized in that, comprise alkaline solution and auxiliary agent in described absorption tower, described alkaline solution is one or more in NaOH, calcium hydroxide, calcium oxide, magnesia, calcium carbonate, ammoniacal liquor and seawater, and described auxiliary agent is organic solvent.
8. a desulfurization denitration method that utilizes the described system for desulfuration and denitration of claim 1～7 any one comprises the following steps:
A) adopt heater by the even level pipe heating of gas mixing device;
B) hydrogenperoxide steam generator in the hydrogen peroxide storage tank is ejected into to the even level pipe fitting surface after heating, after decomposing, with the flue gas after the interior dedusting of the second flue, mixes and reacts;
C) reacted flue gas is entered to absorption tower and washed, the flue gas after washing is discharge after dehumidifying.
9. desulfurization denitration method according to claim 8, is characterized in that, the temperature heated described in step a) is 300～600 ℃.
10. desulfurization denitration method according to claim 8, is characterized in that, after step c), also comprises:
By the absorption liquid iterative cycles after described washing, the salt concentration in absorption liquid reaches 30wt%～40wt%, and the self-absorption tower bottom is discharged, and carries out successively liquid dedusting, condensing crystallizing and drying.
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| CN106823717A (en) * | 2017-01-23 | 2017-06-13 | 湖北蔚天环保科技有限公司 | A kind of coke oven flue gas comprehensive treatment system |
| CN108261900A (en) * | 2018-03-28 | 2018-07-10 | 南京工业大学 | A kind of segmented device and method to flue gas desulfurization and denitrification |
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| CN103432891B (en) | 2015-07-08 |
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