CN105983311A - Desulfurization and denitrification integrated system for flue gas of chain-grate boiler - Google Patents
Desulfurization and denitrification integrated system for flue gas of chain-grate boiler Download PDFInfo
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Abstract
The invention relates to a desulfurization and denitrification integrated system for flue gas of a chain-grate boiler. The desulfurization and denitrification integrated system comprises a desulfurization and denitrification apparatus, an ozone pre-denitrification apparatus, and an oxidizing agent supply device. The desulfurization and denitrification apparatus has a flue gas inlet connected with a boiler smoke-evacuation pipe, a desulfurization dust-removal chamber, a denitrification chamber and a smoke-evacuation chamber arranged in the desulfurization and denitrification apparatus at intervals; the ozone pre-denitrification apparatus comprises an ozone generator and a rapid mixing/filling apparatus possessing a filling pipe, the filling pipe is arranged on the boiler smoke-evacuation pipe for supplying the ozone; the oxidizing agent supply device comprises an oxidizing agent storage tank and several atomization spray guns, and the atomization spray guns are arranged in the denitrification chamber. After processing the flue gas in the boiler by the desulfurization and denitrification integrated system, the dust-collection efficiency is 96-99%, the desulfurization efficiency is 96-98%, and the denitrification efficiency is 75-85%. Based on the different reaction characteristics of ozone and hydrogen peroxide, the desulfurization and denitrification integrated system provides the reasonable transformation on the current flue gas purification systems, and the unexpected effect is obtained. The ozone and hydrogen peroxide consumption used by the integrated system is little, and the denitrification cost is greatly reduced.
Description
Technical field
The present invention relates to a kind of boiler desulfurization dust arrester and Denitration in Boiler device, more specifically, be to carry out desulfurization and denitrification integral system about a kind of flue gas to chain-grate boiler.
Background technology
We always work on the research and extension of the desulfurization to boiler smoke and denitrification apparatus for many years, achieved the most at first in 1999, by FGD by spraying mist equipment, the flue gas of Industrial Boiler and various kiln is carried out desulfurization and dedusting, big-and-middle shape dust, granule and SO entrained in major part flue gas can be removed2Gas, therefore FGD by spraying mist equipment has spraying or spray desulfurization and the dual function of dedusting, obtain very good effect, but because this equipment volume is big and floor space is big, it is the most uneconomic, and the inside of existing apparatus arrange also have certain not enough, and manufacturing cost and producing cost the highest.Later, through above-mentioned FGD by spraying mist equipment is updated and perfect, propose a kind of entitled " the gas-liquid swirling-flow desulfurizing dust-collector of high-efficient desulfation dust-extraction device " Patent No. ZL 200920286787.7,2009 applyings date December utility model patent on the 30th.nullThe desulfurizing dust-collector of this patent is the body being built rectangular cubic repeatedly by masonry，It has spray except mist portion、、Water smoke separated part and pond portion: spray is formed except mist portion by first and second rooms of erecting being adjacently located on body inwall side and connected by they lower openings，First upper end erecting room has the air inlet connecting external feed stream pipe，Wall is provided with two-layer spray swirling flow layer，Each spray swirling flow layer is provided with one or more nozzles and one or more overflowing boards by feed liquid pipeline，Second erects room wall is provided with a floor spraying layer，This spray swirling flow layer is provided with one or more nozzles by feed liquid pipeline，Described overflowing board is motorless swirling flow blower fan，It is arranged on below the nozzle of each spray swirling flow layer，Described spray erects bottom room the connection position at opening except mist portion first and second and arranges the common pond portion storing water；Fume emission portion is positioned at spray except the opposite side of the relative body inwall in mist portion adjacent by the first interior wall, and its upper end has the air vent of connection outer exhaust duct；Water smoke separated part spray in body except mist portion and the left side in fume emission portion and by second and the 3rd interior wall remove mist portion and fume emission portion is adjacent with spraying.In its work process, first erects the high pressure that room nozzle ejects forms vapour mist flow containing alkali liquor, when flowing through overflowing board, promotes overflowing board to rotate, with promote to absorb the SO in flue gas and its heat content and make flue dust, flying dust fully with the contacting of alkalies, temperature decline and beneficially desulfurization and dedusting.Therefore, having spraying or spray desulfurization and the dual function of dedusting, efficiency of dust collection about reaches 99%, and desulfuration efficiency is about 98%.Therefore, we have accumulated certain experience in desulfurating dust-removing equipment manufacture and application aspect, can provide the user stronger, the technology of reliable desulfurization and dedusting and technology ensuring.
In terms of the denitration of boiler smoke, there are two class ways both at home and abroad at present, one class is to use the denitration dust collecting device being individually for denitration and manufacture and design, a kind of associating SCR/SNCR method of denitration of such as United States Patent (USP) US 6146606A, specifically discloses carbon fuel and air and burn in combustion furnace and produce flue gas by lance ejection alkali liquor-urea liquid with the nitrogen oxides NO in flue gas discharged in the burning of pretreatment oil burning boilerx, then the nitrogen oxides in residue flue gas utilizes catalyst to carry out catalytic reduction reaction to reach the purpose of denitrating flue gas and dedusting.In addition, also have a kind of " emission of oil burning boiler be may select the method using non-catalytic reduction " such as European patent EP 0426978A1 different from above-mentioned United States Patent (USP) institute's nitrogen-containing oxide method on processing in residue flue gas, be the method using reducing agent directly to be reduced.This class method of denitration can not meet simultaneously need to desulfurization and the occasion of denitration.Another kind of way is the desulfuring and denitrifying apparatus that desulfurization and denitration are combined and manufactured and designed, such as Shanghai Communications Universitys etc. are positioned Chinese invention patent ZL 2010106166787 that on October 22nd, 2010 submits to, that authorized, entitled, " implementation method reclaimed based on magnesium-ammonium method synthesis desulfurating denitration and product ", propose addition oxidant in flue gas, with the synthesis desulfurating denitration simultaneously of the magnesia slurry containing carbamide, oxidant includes one or more of ozone, hypochlorite or chlorine dioxide.The method is succeeded utilization in terms of the desulphurization denitration of coal-burning boiler, it it is a developing direction of smoke comprehensive improvement, but, this patented technology on denitration efficiency less than 70%, the highest, for that purpose it is necessary to seek a kind of there is higher denitrification efficiency, structure more advantages of simple, new removing SO easy to use2And NOxIntegrated Processing Unit and method.
Summary of the invention
It is an object of the invention to overcome the deficiency of existing flue gas desulfurization and denitrification device, and propose a kind of flue gas to chain-grate boiler and carry out desulfurization and denitrification integral system, it is according to smoke distribution, temperature and the flow feature of combustion coal chain boiler, existing desulfation dust-extraction device is transformed, can be used for noncatalytic reduction and carry out secondary flue gas denitration and with carry out flue gas desulfurization containing alkali liquor, there is connection and reasonable arrangement, the processing system of the reliable and high desulphurization denitration governance efficiency of structure..
Realize the technical scheme of object above to be to provide a kind of flue gas to chain-grate boiler and carry out desulfurization and denitrification integral system, including desulfuring and denitrifying apparatus, desulphurization circulating liquid bath, spray equipment, overflowing board, the pre-denitration device of ozone, oxidant supply arrangement, demister and chimney, wherein, desulfuring and denitrifying apparatus is had to connect the gas approach of boiler exhaust gas pipe and connect purifying smoke after desulfuring and denitrifying apparatus desulphurization denitration and is discharged into the exhanst gas outlet of chimney by connecting tube, it is characterized in that: the desulfuring and denitrifying apparatus between its gas approach and exhanst gas outlet is the most internal is interval with the desulfurization dust chamber being connected to boiler exhaust gas pipe, denitration chamber and two fume emission rooms being connected to chimney connector,
The pre-denitration device of described ozone includes ozonator and quickly mixes filling apparatus, wherein, described quick mixing filling apparatus includes one or more filler pipe and mixing stirring mechanism, wherein, filler pipe is installed on boiler exhaust gas pipe in the inlet arranged, described ozonator is connected by the filler pipe of pipeline with boiler exhaust gas pipe, with from filler pipe to in boiler exhaust gas pipe provide ozone, described mixing stirring mechanism is installed on the boiler exhaust gas pipe being positioned at above filler pipe；
Desulfuring and denitrifying apparatus is to be built folded or Plate Welding rear inner lining anti-corrosion material by masonry to form, rectangular cube, and with desulfurization dust chamber, denitration chamber with separated by interior wall except the sequencing of mist process chamber and be connected by interior wall duct to each other；Described spray equipment and overflowing board are arranged in desulfurization dust chamber；
Described oxidant supply arrangement includes oxidant storage tank, necessary supply regulation metering unit and multiple atomizing lance, wherein, described atomizing lance with some rows form one group be arranged on denitration chamber in and by pipeline connection oxidant storage tank；
Described demister is that multilamellar removes mist plate, is arranged on fume emission indoor.
Desulfurization and denitrification integral system as described above, wherein, described desulfurization dust chamber directly connects with gas approach, one layer or two-layer spray swirling flow layer it is provided with in it, each spray swirling flow layer is provided with one or more nozzle being connected with the supply desulphurization circulating liquid bath pipeline containing alkali liquor water and one or more overflowing boards, described overflowing board is motorless swirling flow blower fan, is arranged on below the nozzle of each spray swirling flow layerInstituteThe connection position stating porthole road within it bottom desulfurization dust chamber is provided below the first pond portion storing water.
Desulfurization and denitrification integral system as described above, wherein, the filler pipe of described quick mixing filling apparatus is the pipe being offered multiple hole by tube wall, described mixing stirring mechanism is unpowered mixer, is to be made up of the blade ozone ejected from filling pore and flue gas being carried out mix and blend when filling ozone。
Desulfurization and denitrification integral system as described above, wherein, the concentration of described oxidant is 8-20% weight percent, the atomizing lance of described oxidant supply arrangement has oxidizer discharge mouth and air-out, air-out provides the pressure air of 6-8 kg/cm by air compressor machine, to be atomized by the oxidant that oxidizer discharge mouth exports.；
Desulfurization and denitrification integral system as described above, wherein, described atomizing lance is formed 1 group by multiple unit atomizing spray guns, has 1-2 layer, is arranged in denitration chamber to be spaced up and down when 2 layers,
Desulfurization and denitrification integral system as described above, wherein, the pipeline between described ozonator and quickly mixing filling apparatus is provided with smelly oxygen valve, to be automatically adjusted ozone injection pressure, concentration and flow velocity.
Desulfurization and denitrification integral system as described above, wherein, the input pressure of described ozone is 1 kilograms per centimeter square。
Desulfurization and denitrification integral system as described above, wherein, described quick mixing filling apparatus uses jet to inject and jet water conservancy diversion hybrid technology, it is ensured that ozone is sufficiently mixed with flue gas, and total mixing resistance is less than the time of contact of 10Pa, ozone and flue gas at 1-3s.
Desulfurization and denitrification integral system as described above, wherein, the inlet of described boiler exhaust gas pipe and the gas approach air line distance of desulfuring and denitrifying apparatus are 5-10 rice, the filler pipe a length of 2-5 rice of described quick mixing filling apparatus.
Desulfurization and denitrification integral system as described above, wherein, it is characterised in that: the efficiency of dust collection of described system for desulfuration and denitration be maintained at 96～99%, desulfuration efficiency: 96～98% and denitration efficiency: 75～85%.
Use the present invention described system for desulfuration and denitration to boiler smoke process after, efficiency of dust collection be maintained at 96～99%, desulfuration efficiency: 96～98% and denitration efficiency 75～85%.For described denitration efficiency, NOxConcentration of emission is by 500 mg/Nm3It is down to 100 mg/Nm3Hereinafter, pulverized-coal fired boiler denitration improved discharged nitrous oxides concentration is made to meet the discharge standard of " fossil-fuel power plant atmospheric pollutant emission standard " (BG13223-2011) emission limits of nitrogen oxides 100 milligram/cubic metre.
From the above, based on the response characteristic that above-mentioned ozone and hydrogen peroxide are different, propose pre-denitration and the desulphurization denitration composite processing system of " before desulfuring and denitrifying apparatus, in ozone pre-oxidation denitration-desulfuring and denitrifying apparatus, hydrogen peroxide oxidation after desulfurization and dedusting absorbs nitrogen oxides in effluent ", the most particularly " flue gas combination oxidative absorption denitration " technique, as long as the equipment of existing flue gas purification system is carried out the most reasonable and easy transformation, just can obtain beyond thought effect, and make the desulfurization of boiler and denitration no longer each independence and denitrating technique seem more motility and on-the-spot adaptability.Meanwhile, this composite processing system uses ozone and hydrogen peroxide inexpensive, consumes also few, also can be substantially reduced denitration cost.
Brief Description Of Drawings
Fig. 1 is the structure sectional view of desulfuring and denitrifying apparatus in the present invention, also show spray spout, spray nozzle, overflowing board, the demister wherein installed and is connected with the boiler exhaust gas pipe equipped with quickly mixing filling apparatus on its gas approach and the situation of connection of exhanst gas outlet and chimney in figure；；
Fig. 2 is desulphurization circulating liquid bath in the present invention, oxidant supply arrangement, the pre-denitration device of ozone and the layout schematic diagram of oxidant circulation liquid bath；
Fig. 3 is the A-A sectional view of Fig. 1.
Detailed description of the invention
nullRefer to Fig. 1 and Fig. 3，Figure showing, the flue gas to chain-grate boiler of the present invention carries out desulfurization and denitrification integral system，Including desulfuring and denitrifying apparatus 1、Spray equipment 2、Desulphurization circulating liquid bath 3、Overflowing board 4、Oxidant supply arrangement 5、The pre-denitration device of ozone 6、Demister 7、Chimney 8 and oxidant circulation liquid bath 10，Wherein，Desulfuring and denitrifying apparatus 1 is that repeatedly or Plate Welding rear inner lining anti-corrosion material forms by masonry block，Rectangular cube，Its outer gas approach 19 with connection boiler exhaust gas pipe 9 and connection purifying smoke after desulfuring and denitrifying apparatus desulphurization denitration are discharged into the exhanst gas outlet 18 of chimney 8 by connecting tube，Desulfuring and denitrifying apparatus body between its gas approach 19 and exhanst gas outlet 18 has the desulfurization dust chamber 11 being separated by interior wall sequentially and being connected by the duct of interior wall to each other in it、Denitration removes fog chamber 12 and two fume emission rooms 13、The sequencing of 14 is by interior wall 111、121、131 separate and to each other by the duct 112 of interior wall、122、132 are connected.Additionally, described gas approach 19 is in desulfurization dust chamber 11 upper end, described exhanst gas outlet 18 is in top, fume emission room 14,InstituteState and be provided below divider wall 113 to form first pond portion 114 and the second pond portion 115 that store water with denitration except the duct 112 of fog chamber 12 interior wall connects position at it bottom desulfurization dust chamber.
Described spray equipment 2 and overflowing board 4 are arranged in desulfurization dust chamber 11.Preferably, described spray equipment 2 and overflowing board 4 are provided with two-layer, arrange at certain intervals, and each layer of spray equipment 2 and overflowing board 4 are provided with multiple nozzle being connected with supply desulphurization circulating liquid bath 3 pipeline containing alkali liquor water and one or more overflowing boards 4.Described overflowing board 4 is motorless swirling flow blower fan, is arranged on the lower section of each spray equipment.Generally, nozzle selection uses WC series hollow cone nozzle, and flow is at 82 ~ 136 liters/min, and pressure is at 0.7-1 bar.
Described desulphurization circulating liquid bath 3 as the doctor solution of spray equipment 2 supply and spray desulfurization process after liquid, the i.e. accumulator tank from the waste water in the first pond portion 114 be positioned near boiler or desulfuring and denitrifying apparatus 1.
Described oxidant supply arrangement 5 includes oxidant storage tank oxidant storage tank 51, necessary supply regulation metering unit 53 and multiple atomizing lance 52, wherein, oxidant storage tank oxidant storage tank 51 uses the canned oxidant can bought on market, such as, include sodium sulfite, sodium chlorite, hydrogen peroxide, sodium peroxydisulfate etc.；Necessary supply regulation metering unit includes that dosing pump, effusion meter, Pressure gauge and control valve, described atomizing lance 52 form one group with some rows, is arranged on denitration except fog chamber 12 is interior and connects oxidant storage tank 51 by pipeline.Wherein, the concentration of oxidant that oxidant storage tank oxidant storage tank 51 provides is 8-20%, for weight percent and can be regulated.Described atomizing lance is atomized spray rifle, has oxidizer discharge mouth and air-out, and air-out provides the pressure air of 6-8 kg/cm by air compressor machine, to be atomized by the oxidant that oxidizer discharge mouth exports.It addition, described atomizing lance 52 also can be formed 1 group by multiple unit spray guns, there is 1-2 layer, be arranged on denitration except in fog chamber when 2 layers to be spaced up and down,
Described demister 7, is arranged in fume emission room 13 except mist plate for multilamellar, to remove the fog in flue gas and fine particle after denitration.
The pre-denitration device of described ozone 6 includes ozonator 61, ozone control set for adjusting 63 and quickly mixes filling apparatus 62, wherein, described ozonator 61 can be selected for such as model NLO-25K (separate unit ozonator ozone output 25kg/h, nominal concentrations: 135mg/L), MB-D-K10000(separate unit ozonator rated output 15000gO3/ h, ozone concentration 20～35mg/L), it is connected to the inlet 91 of boiler exhaust gas pipe 9 by pipeline, and described ozone control set for adjusting includes air relief valve, pneumatic on-off valve, smelly oxygen valve, pressure and temperature transmitter etc.；Described quick mixing filling apparatus 62 includes one or more filler pipe 621 and mixing stirring mechanism 622, wherein, filler pipe 621 is installed on boiler exhaust gas pipe 9 in the inlet 91 arranged, described ozonator 61 is connected with the filler pipe 621 of boiler exhaust gas pipe by pipeline, with from filler pipe to in boiler exhaust gas pipe provide ozone, described mixing stirring mechanism 622 is installed on the boiler exhaust gas pipe 9 being positioned at above filler pipe.The filler pipe 621 of described quick mixing filling apparatus is the pipe being offered multiple hole 6211 by tube wall, described mixing stirring mechanism 622 is unpowered mixer, is that the blade 6221 being carried out mix and blend by the ozone ejected in the hole 6211 of pipe when filling ozone and flue gas is constituted.Ozone control set for adjusting is installed, to be automatically adjusted ozone injection pressure, concentration and flow velocity on pipeline between described ozonator 61 and quickly mixing filling apparatus 62.The input pressure of described ozone is 1 kg/cm, and therefore, described quick mixing filling apparatus 62 needs to use jet to inject and jet water conservancy diversion hybrid technology, and to ensure that ozone is sufficiently mixed with flue gas, and total mixing resistance controls less than 10Pa.In the installation of filler pipe 621, the inlet 91 of described boiler exhaust gas pipe 9 is 6-10 rice with gas approach 19 air line distance of desulfuring and denitrifying apparatus 1.The filler pipe 621 a length of 2-6 rice of described quick mixing filling apparatus.
Oxidant circulation liquid bath 10 is the liquid after the oxidant for storing in oxidant storage tank is processed by atomizing lance 52 denitration, i.e. flows to the recovery of the useless oxidant in the second pond portion 115, with by its treated recycling.
The efficiency of dust collection of the described system for desulfuration and denitration of the present invention be maintained at 96～99%, desulfuration efficiency: 96～98% and denitration efficiency: 75～85%.
The flue gas to combustion coal chain boiler of the present invention carries out pre-denitration and desulphurization denitration composite processing system apply 75 tons/time pulverized-coal fired boiler, the denitration of flue gas and desulfurization processing procedure:
1, pre-denitration: in the boiler exhaust gas pipe 9 above desulfuring and denitrifying apparatus 1, the temperature of flue gas is 160 DEG C (the boiler exhaust gas inner tube smoke temperature of usual above-mentioned boiler is 120-180 DEG C), ozone produced by ozonator 61 is delivered to quickly mix the filler pipe 621 of filling apparatus 62 and also can be affected the size of conveying capacity by its quantity of hole 6211(from inlet 91 through piping) with ozone concentration 30mg/L, the flow and the discharge pressure that set eject as 1 kg/cm, only need to ensure flue gas before entering desulfuring and denitrifying apparatus 1 time of contact of ozone and flue gas at 1-3s.As for the dosage of ozone, can by with NOxMol ratio in 0.3-0.8 range regulation, NO in specific implementation process flue gas to be regardedxActual concentrations and set denitration efficiency depending on.
Ozone squit hole 6211 also impacts blade 6221 and makes it persistently rotate, and accelerates to be thoroughly mixed with flue gas, it is achieved NO is to NO2Conversion.The reaction related generally to is as follows:
NO+O3→NO2+O2
NO2+O3→NO3+O2
NO3+NO2→N2O5
NO+O+M→NO2+M
NO2+O→NO3
Here, the ozone in inlet 91 input is designed with jet and injects and water conservancy diversion hybrid technology, on the basis of ensureing that ozone and flue gas are sufficiently mixed, reduces its gas-flow resistance as far as possible, controls less than 10Pa for this total mixing resistance hole.
2, desulfurization and dedusting in desulfuring and denitrifying apparatus: enter desulfurization dust chamber 11 from top to down from gas approach 19 through the flue gas of pre-denitration, flue gas is first subjected to spraying containing alkali liquor water (liquid that alkali liquor mixes) of nozzle ejection with water, form vapour mist flow, when it flows through overflowing board, promotion overflowing board rotates, flue dust and flying dust is made to be in swirling flow, fully with the contacting of alkalies, and to rush at pond portion at a high speed under injection and swirling flow effect, make flue gas water is carried out water-bath, evoke the eddy current of water in the portion of pond, by SO in flue gas2Again by alkali liquor absorption, reaction, and flying dust grit soaks, in molten heavy water.In the process, flue gas and alkaline reaction are except absorbing SO2Outside with flue dust, absorbing its heat content the most in large quantities so that it is temperature is greatly reduced, temperature is from entering the 140 of gas approach 19oAbout C drops to 60～80 oC.This creates good condition for follow-up denitration except mist.
3, in desulfuring and denitrifying apparatus, denitration removes mist: through the process of journey 2 processed above, flue gas enters denitration from bottom to up except fog chamber 12 from the duct 112 of the interior wall 111 of desulfurization dust chamber 11 bottom, oxidizing agent solution containing about 15% is sprayed from spray gun 52, in denitration is except fog chamber 12, forms fog layer and nitrogen oxides will be carried out efficient absorption, meanwhile oxidant is also to sulfur dioxide effect remaining after desulfurization dust chamber 11 desulfurization and dedusting processes, can further improve desulfuration efficiency, therefore the denitration utilization rate of oxidant can be significantly improved.Its reaction is as follows:
NO+H2O2(liquid phase) → NO2+H2O
2NO2+H2O2(liquid phase) → 2HNO3
2NO+ H2O2(liquid phase) → 2HNO2
SO2+ H2O2(liquid phase) → H2SO4
In denitration except, in fog chamber 13, the flue gas after oxidizing agent solution processes will be by being positioned at the multilamellar of the demister 7 above spray gun 52 except mist plate is to remove steam, fog and tiny micronic dust in flue gas.
4, fume emission in desulfuring and denitrifying apparatus: after the denitration of journey 3 processed above removes mist, flue gas passes upward through the duct 122 on interior wall 121 top and flows to fume emission room 13, steam is made to condense further, processed flue gas makes flowing velocity suitably reduce because of extension, finally from the exhanst gas outlet 18 being positioned at this bottom, room by externally discharged for treated purifying smoke exhaustor until chimney 8.
After whole processing procedure completes, through detection, efficiency of dust collection is 99%, and desulfurized effect is except usual recirculated water alkalescence PH Han alkali liquor
8.5, have the assosting effect of oxidant concurrently and improve, desulfuration efficiency 98%, denitration efficiency 82%.Additionally, also the most perishable because of desulfuring and denitrifying apparatus, service life is longer.
Claims (10)
1. the flue gas to chain-grate boiler carries out desulfurization and denitrification integral system, including desulfuring and denitrifying apparatus, desulphurization circulating liquid bath, spray equipment, overflowing board, the pre-denitration device of ozone, oxidant supply arrangement, demister and chimney, wherein, desulfuring and denitrifying apparatus is had to connect the gas approach of boiler exhaust gas pipe and connect purifying smoke after desulfuring and denitrifying apparatus desulphurization denitration and is discharged into the exhanst gas outlet of chimney by connecting tube, it is characterized in that: the desulfuring and denitrifying apparatus between its gas approach and exhanst gas outlet is the most internal is interval with the desulfurization dust chamber being connected to boiler exhaust gas pipe, denitration chamber and two fume emission rooms being connected to chimney connector,
The pre-denitration device of described ozone includes ozonator and quickly mixes filling apparatus, wherein, described quick mixing filling apparatus includes one or more filler pipe and mixing stirring mechanism, wherein, filler pipe is installed on boiler exhaust gas pipe in the inlet arranged, described ozonator is connected by the filler pipe of pipeline with boiler exhaust gas pipe, with from filler pipe to in boiler exhaust gas pipe provide ozone, described mixing stirring mechanism is installed on the boiler exhaust gas pipe being positioned at above filler pipe；
Desulfuring and denitrifying apparatus is to be built folded or Plate Welding rear inner lining anti-corrosion material by masonry to form, rectangular cube, and with desulfurization dust chamber, denitration chamber with separated by interior wall except the sequencing of mist process chamber and be connected by interior wall duct to each other；Described spray equipment and overflowing board are arranged in desulfurization dust chamber；
Described oxidant supply arrangement includes oxidant storage tank, necessary supply regulation metering unit and multiple atomizing lance, wherein, described atomizing lance with some rows form one group be arranged on denitration chamber in and by pipeline connection oxidant storage tank；
Described demister is that multilamellar removes mist plate, is arranged on fume emission indoor.
2. desulfurization and denitrification integral system as claimed in claim 1, it is characterized in that: described desulfurization dust chamber directly connects with gas approach, one layer or two-layer spray swirling flow layer it is provided with in it, each spray swirling flow layer is provided with one or more nozzle being connected with the supply desulphurization circulating liquid bath pipeline containing alkali liquor water and one or more overflowing boards, described overflowing board is motorless swirling flow blower fan, it is arranged on below the nozzle of each spray swirling flow layerInstituteThe connection position stating porthole road within it bottom desulfurization dust chamber is provided below the first pond portion storing water.
3. desulfurization and denitrification integral system as claimed in claim 1, it is characterized in that: the filler pipe of described quick mixing filling apparatus is the pipe being offered multiple hole by tube wall, described mixing stirring mechanism is unpowered mixer, is to be made up of the blade ozone ejected from filling pore and flue gas being carried out mix and blend when filling ozone。
4. desulfurization and denitrification integral system as claimed in claim 1, it is characterized in that: the concentration of described oxidant is 8-20% weight percent, the atomizing lance of described oxidant supply arrangement has oxidizer discharge mouth and air-out, air-out provides the pressure air of 6-8 kg/cm by air compressor machine, to be atomized by the oxidant that oxidizer discharge mouth exports.
5. desulfurization and denitrification integral system as claimed in claim 1, it is characterised in that: described atomizing lance is formed 1 group by multiple unit atomizing spray guns, has 1-2 layer, is arranged in denitration chamber to be spaced up and down when 2 layers。
6. desulfurization and denitrification integral system as claimed in claim 1, it is characterised in that:
Smelly oxygen valve is installed, to be automatically adjusted ozone injection pressure, concentration and flow velocity on pipeline between described ozonator and quickly mixing filling apparatus.
7. desulfurization and denitrification integral system as claimed in claim 6, it is characterised in that: the input pressure of described ozone is 1 kilograms per centimeter square。
8. desulfurization and denitrification integral system as claimed in claim 1, it is characterized in that: described quick mixing filling apparatus uses jet to inject and jet water conservancy diversion hybrid technology, ensure that ozone is sufficiently mixed with flue gas, and total mixing resistance is less than the time of contact of 10Pa, ozone and flue gas at 1-3s.
9. desulfurization and denitrification integral system as claimed in claim 1, it is characterised in that: the inlet of described boiler exhaust gas pipe and the gas approach air line distance of desulfuring and denitrifying apparatus are 5-10 rice, the filler pipe a length of 2-5 rice of described quick mixing filling apparatus.
10. the desulfurization and denitrification integral system as described in any one of claim 1 to 9, it is characterised in that: the efficiency of dust collection of described system for desulfuration and denitration be maintained at 96～99%, desulfuration efficiency: 96～98% and denitration efficiency: 75～85%.
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| CN106881012A (en) * | 2017-03-16 | 2017-06-23 | 黄胜建 | A kind of coking furnace desulfurization and denitrification integral system |
| CN108126464A (en) * | 2018-02-06 | 2018-06-08 | 东营市胜东特种纸有限责任公司 | Boiler desulphurization denitration dedusting minimum discharge system and its desulphurization denitration dust removal method |
| CN110180345A (en) * | 2019-07-01 | 2019-08-30 | 台州锐祥机械设备有限公司 | Liquid waste processing proportion mixing desulfuring and denitrifying apparatus |
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| CN108126464A (en) * | 2018-02-06 | 2018-06-08 | 东营市胜东特种纸有限责任公司 | Boiler desulphurization denitration dedusting minimum discharge system and its desulphurization denitration dust removal method |
| CN110180345A (en) * | 2019-07-01 | 2019-08-30 | 台州锐祥机械设备有限公司 | Liquid waste processing proportion mixing desulfuring and denitrifying apparatus |
| CN111760439A (en) * | 2020-07-20 | 2020-10-13 | 江西庞泰环保股份有限公司 | Dust removal, desulfurization and denitrification process and device |
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