CN112844015A - High-temperature critical treatment method and system for dioxin in waste incineration flue gas - Google Patents
High-temperature critical treatment method and system for dioxin in waste incineration flue gas Download PDFInfo
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- CN112844015A CN112844015A CN202011510648.5A CN202011510648A CN112844015A CN 112844015 A CN112844015 A CN 112844015A CN 202011510648 A CN202011510648 A CN 202011510648A CN 112844015 A CN112844015 A CN 112844015A
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- dioxin
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 133
- 239000003546 flue gas Substances 0.000 title claims abstract description 128
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 238000004056 waste incineration Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000000779 smoke Substances 0.000 claims abstract description 100
- 238000005507 spraying Methods 0.000 claims abstract description 59
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 238000001179 sorption measurement Methods 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims description 73
- 238000003860 storage Methods 0.000 claims description 59
- 239000007921 spray Substances 0.000 claims description 52
- 239000012295 chemical reaction liquid Substances 0.000 claims description 49
- 238000007789 sealing Methods 0.000 claims description 22
- 239000011575 calcium Substances 0.000 claims description 20
- 229910052791 calcium Inorganic materials 0.000 claims description 20
- 239000003463 adsorbent Substances 0.000 claims description 18
- 239000010881 fly ash Substances 0.000 claims description 18
- 238000001802 infusion Methods 0.000 claims description 18
- 239000010813 municipal solid waste Substances 0.000 claims description 17
- 239000002956 ash Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 15
- -1 calcium amino acid Chemical class 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 239000002699 waste material Substances 0.000 claims description 8
- 239000003814 drug Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 230000001502 supplementing effect Effects 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 4
- 239000002041 carbon nanotube Substances 0.000 claims description 3
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000010865 sewage Substances 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims 2
- 238000012545 processing Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 10
- 239000000460 chlorine Substances 0.000 description 10
- 229910052801 chlorine Inorganic materials 0.000 description 10
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 9
- 241000208125 Nicotiana Species 0.000 description 9
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 9
- 150000001413 amino acids Chemical class 0.000 description 9
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 9
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 9
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 8
- 239000004202 carbamide Substances 0.000 description 8
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 8
- 235000019345 sodium thiosulphate Nutrition 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 6
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 6
- 239000002243 precursor Substances 0.000 description 6
- 229910001385 heavy metal Inorganic materials 0.000 description 5
- 239000002923 metal particle Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- ISPYQTSUDJAMAB-UHFFFAOYSA-N 2-chlorophenol Chemical compound OC1=CC=CC=C1Cl ISPYQTSUDJAMAB-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 229910001510 metal chloride Inorganic materials 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 238000006479 redox reaction Methods 0.000 description 3
- 239000003517 fume Substances 0.000 description 2
- 239000002574 poison Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
- B01D53/70—Organic halogen compounds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/206—Organic halogen compounds
- B01D2257/2064—Chlorine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
- B01D2258/0291—Flue gases from waste incineration plants
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a high-temperature critical treatment method and a system for dioxin in waste incineration flue gas, wherein a first smoke pipe is arranged at the top of an incineration tower of a high-temperature critical treatment system for dioxin in waste incineration flue gas, one end, far away from the incineration tower, of the first smoke pipe is connected to one end of a spraying mechanism, a second smoke pipe is arranged at the top of the spraying mechanism, one end, far away from the spraying mechanism, of the second smoke pipe is arranged at the top of one side of a cyclone separator in a tangential direction, a third smoke pipe is arranged at the top of the other side of the cyclone separator, one end, far away from the cyclone separator, of the third smoke pipe is connected to one end of an adsorption box, the other end of the adsorption box is connected to an air inlet of an air blower, and an air outlet of the air; this high temperature critical processing system of dioxin can restrain the waste incineration in-process and produce the dioxin to the effectual getting rid of the dioxin that will produce, the flue gas that makes waste incineration produce easily reaches emission standard, and the treatment effect of dioxin is good and treatment cost is low.
Description
Technical Field
The invention relates to the field of flue gas treatment, in particular to a high-temperature critical treatment method and system for dioxin in waste incineration flue gas.
Background
Dioxin is usually 1, 4-dioxane diene and derivatives thereof, has strong toxicity, great harm to human bodies and natural environment, is difficult to naturally degrade in natural environment, often exists in atmosphere, soil and water as tiny particles, and the main pollution sources are industries of chemical and metallurgical industry, waste incineration, paper making, pesticide production and the like. The rubber bags used in daily life and PVC (polyvinyl chloride) soft rubber contain chlorine, and when the objects are burnt, dioxin is released and is suspended in the air. Therefore, the dioxin in the discharged gas is imperative to be treated.
Because dioxin is likely to be synthesized in each process of waste treatment and is resynthesized in the process of cooling even after high-temperature thermal decomposition, the control on the content of the dioxin in waste incineration mainly comprises the improvement of equipment at present, and the cost is higher; or the secondary synthesis of the dioxin can not be avoided by regulating and controlling at a certain stage, so that the content of the dioxin in the final fly ash can not reach the emission standard.
Therefore, how to improve the problems that a large amount of dioxin is easy to generate in the existing waste incineration process, the generated dioxin is difficult to treat, and the treatment effect is poor is the problem to be solved by the invention.
Disclosure of Invention
In order to overcome the technical problems, the invention aims to provide a high-temperature critical treatment method and a system for dioxin in waste incineration flue gas, wherein the method comprises the following steps: the method comprises the steps of opening a sealing door on an incineration tower, uniformly mixing garbage and calcium amino acid, adding the mixture into an inner cavity of the incineration tower, closing the sealing door, injecting reaction liquid into an inner cavity of a liquid storage bin through a liquid adding pipe, starting a flame sprayer, releasing flame by the flame sprayer to incinerate the garbage and the calcium amino acid, enabling smoke generated by the garbage to pass through filter holes in a smoke filter plate, enabling large-volume fly ash to be blocked by the smoke filter plate or attached to the bottom of the smoke filter plate, starting a vibration motor, driving the smoke filter plate to vibrate and drop the large-volume fly ash to the bottom of the inner cavity of the incineration tower through the vibration motor, enabling the smoke to enter the inner cavity of a spray bin from a smoke inlet through a first smoke pipe, starting an infusion pump, pumping the reaction liquid out of the liquid storage bin through a return pipe, conveying the reaction liquid into the spray pipe through a conveying pipe, and spraying the reaction liquid from, reaction liquid is used for spraying and treating flue gas, the reaction liquid after the flue gas treatment flows back to the liquid storage bin through the support pipe, the reaction liquid is circularly sprayed after being filtered by the liquid filter plate, the reaction liquid after the flue gas treatment which does not pass through the liquid filter plate is discharged through the blow-off pipe, the flue gas is discharged from the smoke outlet and is conveyed to the inner cavity of the cyclone separator in the tangential direction through the second smoke pipe, fly ash in the flue gas forms an outer rotational flow and enters the inner cavity of the ash storage tank from the material receiving pipe for storage, the rest flue gas is conveyed to the inner cavity of the adsorption tank through the third smoke pipe, after dioxin in the flue gas is adsorbed by the adsorbent in the inner cavity of the adsorption tank, the air blower is started, the air blower operates to draw out the flue gas and convey the flue gas to the smoke exhaust pipe for discharge, and the problems that a large amount of dioxin is easy to generate in the existing garbage incineration process, the generated dioxin is difficult to.
The purpose of the invention can be realized by the following technical scheme:
a high-temperature critical treatment method for dioxin in waste incineration flue gas comprises the following steps:
the method comprises the following steps: opening a sealing door on an incineration tower of a high-temperature critical treatment system for dioxin in waste incineration flue gas, uniformly mixing the waste and calcium amino acid, then adding the mixture into an inner cavity of the incineration tower together, closing the sealing door, and injecting reaction liquid into an inner cavity of a liquid storage bin through a liquid adding pipe;
step two: starting the flame sprayers, releasing flame by a plurality of flame sprayers to burn the garbage and the calcium amino acid, enabling smoke generated by the garbage to pass through filter holes in a smoke filter plate, blocking large-volume fly ash by the smoke filter plate or attaching the large-volume fly ash to the bottom of the smoke filter plate, starting a vibration motor, and driving the smoke filter plate to vibrate to enable the large-volume fly ash to fall to the bottom of an inner cavity of the burning tower;
step three: the flue gas enters the inner cavity of the spraying bin from the flue gas inlet through the first flue pipe, the infusion pump is started, the infusion pump runs to pump the reaction liquid out of the liquid storage bin through the return pipe and convey the reaction liquid to the spraying pipe through the conveying pipe, the reaction liquid is sprayed out from the spray head after filling the arc spraying pipe and the transverse spraying pipe, and the reaction liquid sprays the flue gas;
step four: the reaction liquid after the flue gas treatment flows back to the liquid storage bin through the supporting pipe, is filtered by the liquid filter plate and then is circularly sprayed, and the reaction liquid after the flue gas treatment which does not pass through the liquid filter plate is discharged through the discharge pipe;
step five: the smoke is discharged from the smoke outlet and is conveyed to the inner cavity of the cyclone separator in the tangential direction through the second smoke tube, the fly ash in the smoke forms an external rotational flow and enters the inner cavity of the ash storage tank from the material receiving tube for storage, and the rest smoke is conveyed to the inner cavity of the adsorption tank through the third smoke tube;
step six: after dioxin in the flue gas is adsorbed by the adsorbent in the inner cavity of the adsorption box, the blower is started, the blower operates to pump out the flue gas and convey the flue gas to the smoke exhaust pipe for discharging, and the high-temperature critical treatment process of the dioxin in the waste incineration flue gas is completed.
As a further scheme of the invention: the utility model provides a critical processing system of high temperature of dioxin in msw incineration flue gas, includes incineration tower, first tobacco pipe, sprays mechanism, second tobacco pipe, cyclone, third tobacco pipe, adsorption tank, discharge fume pipe, air-blower, first tobacco pipe is installed at incineration tower's top, the one end that incineration tower was kept away from to first tobacco pipe is connected to the one end that sprays the mechanism, the second tobacco pipe is installed at the top that sprays the mechanism, the one end that sprays the mechanism is kept away from to the second tobacco pipe is installed at cyclone's one side top with tangential direction, the third tobacco pipe is installed at cyclone's opposite side top, cyclone's one end is connected to one of adsorption tank is served to the third tobacco pipe, the other end of adsorption tank is connected to on the air intake of air-blower, the air outlet of air-blower is connected to discharge fume on one side of pipe.
As a further scheme of the invention: it has the sealing door to burn hinged joint on one side of tower, burn the top one end of tower and install and mend the pencil, the bottom of mending the pencil runs through one side of burning the tower and extends to the inner chamber that burns the tower in, burn and install a plurality of flame thrower on the bottom inner wall of tower, burn the inner chamber top of tower and install the flue gas filter, vibrating motor, two are all installed at the both ends of flue gas filter vibrating motor all installs in the inner wall that burns the tower.
As a further scheme of the invention: the spraying mechanism comprises a spraying bin, a smoke inlet, a smoke outlet, supporting legs, a liquid storage bin, supporting tubes, a backflow tube, an infusion pump and a conveying tube, wherein the smoke inlet is formed in one end of the spraying bin, the smoke inlet is communicated with a first smoke tube, the smoke outlet is formed in the middle of the top of the spraying bin, the smoke outlet is communicated with a second smoke tube, four supporting legs and four liquid storage bins are installed at the bottom of the spraying bin, a plurality of supporting tubes are installed between the bottom of the spraying bin and the liquid storage bin, the backflow tube is installed at the bottom of the liquid storage bin, and one end, away from the liquid storage bin, of the backflow tube is connected to an inlet of the infusion pump.
As a further scheme of the invention: the utility model discloses a liquid pump, including spraying bin, conveyer pipe, liquid filter, liquid feeding pipe, blow off pipe, shower pipe, conveyer pipe, liquid filter, liquid feeding pipe, blow off pipe, the other end bottom of holding the storehouse is installed to the inner chamber of spraying bin, the conveyer pipe runs through one of them stay tube and is connected to on the liquid outlet of transfer pump, hold and install the liquid filter in the inner chamber of storehouse, the one end top that holds.
As a further scheme of the invention: the spraying pipe comprises an arc spraying pipe and a transverse spraying pipe, the arc spraying pipes are arranged side by side, the plurality of transverse spraying pipes are arranged at the bottoms of the arc spraying pipes in an equal radian mode, and a plurality of spray heads are arranged at the bottoms of the arc spraying pipes and the transverse spraying pipes.
As a further scheme of the invention: the cyclone separator is installed on the supporting frame, the bottom end of the cyclone separator is connected with the top end of the material receiving pipe through a bolt, the material receiving pipe is installed at the top of the sealing cover, and the sealing cover is connected to the top of the ash storage tank in a buckling mode.
As a further scheme of the invention: an inner cavity of the ash storage tank is filled with an adsorbent, and the adsorbent is one or a mixture of more of activated carbon, coal powder and carbon nano tubes in any proportion.
As a further scheme of the invention: the working principle of the high-temperature critical treatment system for dioxin in waste incineration flue gas is as follows:
the amino acid calcium and the garbage are mixed through the incineration tower and then are incinerated together, the amino acid calcium and chlorine generated by the garbage incineration can generate chemical action in the early combustion stage with lower temperature to generate hydrogen chloride, and then the hydrogen chloride can react with the residual amino acid calcium to generate metal chloride, so that the attack of chlorine source on carbide is inhibited, the generation of chlorophenol or chlorobenzene is greatly reduced, namely the content of precursor of dioxin is greatly reduced, reaction liquid is sprayed into the flue gas through a spraying mechanism, the reaction liquid is mixed aqueous solution of sodium thiosulfate and urea, the mixed solution of the sodium thiosulfate and the urea is alkaline, on one hand, reactants which are generated by chlorine, hydrogen chloride and the like in the flue gas and generate dioxin can be neutralized, on the other hand, oxidation reduction reaction can be generated with harmful substances such as dioxin in the flue gas, and in addition, heavy metal particles in the flue gas can be poisoned by sulfur dioxide, ammonia and the like generated in the reaction, the catalytic activity of the flue gas is lost, and the resynthesis of decomposed dioxin precursors is avoided, so that the generation of dioxin is inhibited, after particulate matters in the flue gas are removed through the cyclone separator, the flue gas is adsorbed through the adsorbent, and the dioxin is adsorbed by the adsorbent and cannot be discharged along with the flue gas.
The invention has the beneficial effects that:
the invention relates to a high-temperature critical treatment method and a system for dioxin in waste incineration flue gas, which comprises the steps of opening a sealing door on an incineration tower, uniformly mixing the waste and calcium amino acid, then adding the mixture into an inner cavity of the incineration tower, closing the sealing door, injecting reaction liquid into an inner cavity of a liquid storage bin through a liquid adding pipe, starting a flame thrower, releasing flame by a plurality of flame throwers to incinerate the waste and the calcium amino acid, leading flue gas generated by the waste to pass through filter holes on a flue gas filter plate, wherein large-volume fly ash is blocked by the flue gas filter plate or attached to the bottom of the flue gas filter plate, starting a vibrating motor, driving the flue gas filter plate to vibrate and drop the large-volume fly ash to the bottom of the inner cavity of the incineration tower by the vibrating motor, leading the flue gas to enter the inner cavity of the spray bin from a flue gas inlet through a first flue pipe, starting an, and is conveyed into the spray pipes through the conveying pipes, reaction liquid is sprayed out from the spray heads after the arc-shaped spray pipes and the transverse spray pipes are filled with the reaction liquid, the reaction liquid is used for spraying the flue gas, the reaction liquid after the flue gas treatment flows back to the liquid storage bin through the supporting pipe, is filtered by the liquid filter plate and then is circularly sprayed, the reaction liquid after the flue gas treatment which does not pass through the liquid filter plate is discharged through the blow-off pipe, the flue gas is discharged from the flue gas outlet and is conveyed to the inner cavity of the cyclone separator in the tangential direction through the second smoke pipe, the fly ash in the flue gas forms an external rotational flow and enters the inner cavity of the ash storage tank from the material receiving pipe for storage, the rest flue gas is conveyed to the inner cavity of the adsorption tank through the third smoke pipe, and after dioxin in the flue gas is adsorbed by the adsorbent in the inner cavity of the adsorption tank, starting a blower, operating the blower to pump out the flue gas and convey the flue gas to a smoke exhaust pipe for exhaust, and finishing the high-temperature critical treatment process of dioxin in the waste incineration flue gas;
the high-temperature critical treatment system for the dioxin in the waste incineration flue gas is characterized in that amino acid calcium and the garbage are mixed through the incineration tower and then are incinerated together, the amino acid calcium can generate chemical action with chlorine generated by the garbage incineration in an early combustion stage with lower temperature to generate hydrogen chloride, and then the hydrogen chloride can react with the residual amino acid calcium to generate metal chloride, so that the carbide is inhibited from being attacked by a chlorine source, the generated chlorophenol or chlorobenzene is greatly reduced, namely the content of a precursor of the dioxin is greatly reduced, a reaction liquid is sprayed into the flue gas through the spraying mechanism, the reaction liquid is a mixed aqueous solution of sodium thiosulfate and urea, the mixed solution of the sodium thiosulfate and the urea is alkaline, on one hand, reactants which are capable of neutralizing the chlorine, the hydrogen chloride and the like in the flue gas to generate the dioxin, on the other hand, the oxidation reduction reaction can also be generated with harmful substances such as the dioxin and the, in addition, sulfur dioxide, ammonia gas and the like generated in the reaction can poison heavy metal particles in the flue gas, so that the heavy metal particles lose catalytic activity, and the resynthesis of decomposed dioxin precursors is avoided, so that the generation of dioxin is inhibited, after particulate matters in the flue gas are removed through a cyclone separator, the flue gas is adsorbed through an adsorbent, so that the dioxin is adsorbed by the adsorbent and cannot be discharged along with the flue gas.
This high temperature critical processing system of dioxin in msw incineration flue gas simple structure can burn rubbish and restrain the msw incineration in-process and produce the dioxin to obtain effectual the getting rid of the dioxin that produces, make the flue gas that msw incineration produced easily reach emission standard, reduced the treatment cost of dioxin under the reduction causes the pollution to the environment.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of a high-temperature critical treatment system for dioxin in waste incineration flue gas in the invention;
FIG. 2 is a schematic view of the construction of an incineration tower according to the invention;
FIG. 3 is a schematic view showing the internal structure of an incineration tower in the invention;
FIG. 4 is a schematic structural view of a spray mechanism of the present invention;
FIG. 5 is a schematic view of the internal structure of the spray mechanism of the present invention;
FIG. 6 is a schematic view of the structure of the shower pipe of the present invention;
FIG. 7 is a view showing the connection of the arc-shaped shower pipe and the shower head according to the present invention;
FIG. 8 is a view showing the connection of the cyclone separator, the supporting frame and the ash storage tank according to the present invention;
FIG. 9 is a view showing the connection of the receiving pipe, the sealing cover and the ash storage tank according to the present invention;
FIG. 10 is a schematic view showing the internal structure of the adsorption tank of the present invention.
In the figure: 101. an incineration tower; 102. a first smoke tube; 103. a spraying mechanism; 104. a second smoke tube; 105. a cyclone separator; 106. a third smoke tube; 107. an adsorption tank; 108. a smoke exhaust pipe; 109. a blower; 110. a sealing door; 111. a medicine supplementing pipe; 112. a flame thrower; 113. a flue gas filter plate; 114. a vibration motor; 115. a spraying bin; 116. a smoke inlet; 117. a smoke outlet; 118. supporting legs; 119. a liquid storage bin; 120. supporting a tube; 121. a return pipe; 122. an infusion pump; 123. a delivery pipe; 124. a shower pipe; 125. a liquid filter plate; 126. a liquid feeding pipe; 127. a blow-off pipe; 128. an arc-shaped spray pipe; 129. a transverse spray pipe; 130. a spray head; 131. a support frame; 132. a material receiving pipe; 133. a sealing cover; 134. ash storage and irrigation; 135. an adsorbent.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
referring to fig. 1-10, the high temperature critical processing system for dioxin in waste incineration flue gas in this embodiment includes an incineration tower 101, a first smoke pipe 102, a spraying mechanism 103, a second smoke pipe 104, a cyclone separator 105, a third smoke pipe 106, an adsorption tank 107, a smoke exhaust pipe 108, and a blower 109, where the first smoke pipe 102 is installed on the top of the incineration tower 101, one end of the first smoke pipe 102 away from the incineration tower 101 is connected to one end of the spraying mechanism 103, the second smoke pipe 104 is installed on the top of the spraying mechanism 103, one end of the second smoke pipe 104 away from the spraying mechanism 103 is installed on the top of one side of the cyclone separator 105 in a tangential direction, the third smoke pipe 106 is installed on the top of the other side of the cyclone separator 105, one end of the third smoke pipe 106 away from the cyclone separator 105 is connected to one end of the adsorption tank 107, the other end of the adsorption tank 107 is connected to an air inlet of the blower 109, the air outlet of the blower 109 is connected to one side of the smoke exhaust pipe 108;
the incinerator is characterized in that a sealing door 110 is hinged to one side of the incineration tower 101, a medicine supplementing pipe 111 is installed at one end of the top of the incineration tower 101, the bottom end of the medicine supplementing pipe 111 penetrates through one side of the incineration tower 101 and extends into an inner cavity of the incineration tower 101, a plurality of flame sprayers 112 are installed on the inner wall of the bottom of the incineration tower 101, a flue gas filter plate 113 is installed at the top of the inner cavity of the incineration tower 101, vibration motors 114 are installed at two ends of the flue gas filter plate 113, and the two vibration motors 114 are installed in the inner wall of the incineration tower 101;
the spraying mechanism 103 comprises a spraying bin 115, a smoke inlet 116, a smoke outlet 117, supporting legs 118, a liquid storage bin 119, supporting tubes 120, a return tube 121, an infusion pump 122 and a delivery tube 123, wherein the smoke inlet 116 is formed in one end of the spraying bin 115, the smoke inlet 116 is communicated with a first smoke tube 102, the smoke outlet 117 is formed in the middle of the top of the spraying bin 115, the smoke outlet 117 is communicated with a second smoke tube 104, four supporting legs 118 are installed at the bottom of the spraying bin 115, the liquid storage bin 119 is installed among the four supporting legs 118, a plurality of supporting tubes 120 are installed between the bottom of the spraying bin 115 and the liquid storage bin 119, the return tube 121 is installed at the bottom of the liquid storage bin 119, and one end, away from the liquid storage bin 119, of the return tube 121 is connected to a liquid inlet of the infusion pump;
a spray pipe 124 is arranged in the inner cavity of the spray bin 115, a delivery pipe 123 is arranged at the bottom of the spray pipe 124, the delivery pipe 123 penetrates through one of the support pipes 120 and is connected to a liquid outlet of the infusion pump 122, a liquid filter plate 125 is arranged in the inner cavity of the liquid storage bin 119, a liquid feeding pipe 126 is arranged at the top of one end of the liquid storage bin 119, and a sewage discharge pipe 127 is arranged at the bottom of the other end of the liquid storage bin 119;
the spray pipes 124 comprise arc spray pipes 128 and transverse spray pipes 129, the arc spray pipes 128 are arranged side by side, the transverse spray pipes 129 are arranged at the bottoms of the arc spray pipes 128 in an equal radian mode, and a plurality of spray heads 130 are arranged at the bottoms of the arc spray pipes 128 and the transverse spray pipes 129;
the cyclone separator 105 is arranged on the supporting frame 131, the bottom end of the cyclone separator 105 is in bolt connection with the top end of the material receiving pipe 132, the material receiving pipe 132 is arranged on the top of the sealing cover 133, and the sealing cover 133 is connected to the top of the ash storage tank 134 in a buckling mode;
an inner cavity of the ash storage tank 134 is filled with an adsorbent 135, and the adsorbent 135 is one or a mixture of more of activated carbon, pulverized coal and carbon nanotubes in any proportion.
Example 2:
referring to fig. 1 to 10, the present embodiment is a high-temperature critical treatment method for dioxin in waste incineration flue gas, including the following steps:
the method comprises the following steps: opening a sealing door 110 on an incineration tower 101 of a high-temperature critical treatment system for dioxin in waste incineration flue gas, uniformly mixing the waste and calcium amino acid according to the weight ratio of 300-500:1, adding the mixture into an inner cavity of the incineration tower 101, closing the sealing door 110, and injecting reaction liquid into an inner cavity of a liquid storage bin 119 through a liquid adding pipe 126; the reaction solution is a mixed aqueous solution of sodium thiosulfate and urea, wherein the mass fraction of the sodium thiosulfate is 10%, and the mass fraction of the urea is 5%;
step two: starting the torches 112, wherein a plurality of torches 112 release flame to burn the garbage and the calcium amino acid, smoke generated by the garbage passes through filter holes on the smoke filter plate 113, large-volume fly ash in the smoke passes through the filter holes on the smoke filter plate 113, and is blocked by the smoke filter plate 113 or attached to the bottom of the smoke filter plate 113, starting the vibration motor 114, and the vibration motor 114 drives the smoke filter plate 113 to vibrate and drop the large-volume fly ash to the bottom of the inner cavity of the incineration tower 101;
step three: the flue gas enters the inner cavity of the spraying bin 115 from the flue gas inlet 116 through the first flue pipe 102, the infusion pump 122 is started, the infusion pump 122 operates to pump the reaction liquid out of the liquid storage bin 119 through the return pipe 121 and deliver the reaction liquid to the spraying pipe 124 through the delivery pipe 123, the reaction liquid is sprayed out from the spray head 130 after filling the arc spraying pipe 128 and the transverse spraying pipe 129 with the reaction liquid, and the reaction liquid sprays the flue gas;
step four: the reaction liquid after the flue gas treatment flows back to the liquid storage bin 119 through the support pipe 120, is filtered by the liquid filter plate 125 and then is circularly sprayed, and the reaction liquid after the flue gas treatment which does not pass through the liquid filter plate 125 is discharged through the discharge pipe 127;
step five: the flue gas is discharged from the flue gas outlet 117, and is transported to the inner cavity of the cyclone separator 105 through the second flue pipe 104 in a tangential direction, the fly ash in the flue gas forms an external rotational flow and enters the inner cavity of the ash storage tank 134 from the material receiving pipe 132 for storage, and the rest flue gas is transported to the inner cavity of the adsorption box 107 through the third flue pipe 106;
step six: after dioxin in the flue gas is adsorbed by the adsorbent 135 in the inner cavity of the adsorption box 107, the blower 109 is started, the blower 109 operates to pump out the flue gas and convey the flue gas to the smoke exhaust pipe 108 for exhaust, and the high-temperature critical treatment process of the dioxin in the waste incineration flue gas is completed.
Referring to fig. 1 to 10, the working principle of the high-temperature critical treatment system for dioxin in waste incineration flue gas in this embodiment is as follows:
the invention discloses part: the garbage and calcium amino acid are uniformly mixed according to the weight ratio of 300-, the infusion pump 122 is started, the infusion pump 122 operates to pump the reaction liquid out of the liquid storage bin 119 through the return pipe 121, the reaction liquid is conveyed into the spray pipe 124 through the conveying pipe 123, the reaction liquid is sprayed out of the spray head 130 after filling the arc-shaped spray pipe 128 and the transverse spray pipe 129, the reaction liquid sprays the flue gas, the reaction liquid after the flue gas treatment flows back into the liquid storage bin 119 through the support pipe 120, the reaction liquid is circularly sprayed after being filtered by the liquid filter plate 125, the reaction liquid after the flue gas treatment which does not pass through the liquid filter plate 125 is discharged through the drain pipe 127, the flue gas is discharged from the flue gas outlet 117 and conveyed to the inner cavity of the cyclone separator 105 through the second smoke pipe 104 in the tangential direction, the fly ash in the flue gas forms an external rotational flow, the external rotational flow enters the inner cavity of the ash storage bin 134 from the material receiving pipe 132 for storage, the rest flue gas is conveyed into the inner cavity of the adsorption tank 107 through the third smoke pipe 106, and the dioxin in, starting the blower 109, wherein the blower 109 operates to pump out the flue gas and convey the flue gas to the smoke exhaust pipe 108 for exhaust, and the high-temperature critical treatment process of dioxin in the waste incineration flue gas is completed;
according to the high-temperature critical treatment system for dioxin in waste incineration flue gas, amino acid calcium and waste are mixed through the incineration tower 101 and then are incinerated together, the amino acid calcium can have a chemical action with chlorine generated by waste incineration in an early combustion stage with a low temperature to generate hydrogen chloride, and then the hydrogen chloride can react with the residual amino acid calcium to generate metal chloride, so that the phenomenon that a chlorine source attacks carbide is inhibited, the generation of chlorophenol or chlorobenzene is greatly reduced, namely the content of a precursor of the dioxin is greatly reduced, a reaction liquid is sprayed into the flue gas through the spraying mechanism 103, the reaction liquid is a mixed aqueous solution of sodium thiosulfate and urea, the mixed solution of the sodium thiosulfate and the urea is alkaline, on one hand, reactants of the chlorine, the hydrogen chloride and the like in the flue gas to generate the dioxin, and on the other hand, an oxidation reduction reaction can be generated with harmful substances such as the dioxin and the like in the flue gas, in addition, sulfur dioxide, ammonia gas and the like generated in the reaction can poison heavy metal particles in the flue gas, so that the heavy metal particles lose catalytic activity, and resynthesis of decomposed dioxin precursors is avoided, so that generation of dioxin is inhibited, after particulate matters in the flue gas are removed through the cyclone separator 105, the flue gas is adsorbed through the adsorbent 135, so that the dioxin is adsorbed by the adsorbent 135 and cannot be discharged along with the flue gas.
This high temperature critical processing system of dioxin in msw incineration flue gas simple structure can burn rubbish and restrain the msw incineration in-process and produce the dioxin to obtain effectual the getting rid of the dioxin that produces, make the flue gas that msw incineration produced easily reach emission standard, reduced the treatment cost of dioxin under the reduction causes the pollution to the environment.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (8)
1. A high-temperature critical treatment method for dioxin in waste incineration flue gas is characterized by comprising the following steps:
the method comprises the following steps: opening a sealing door (110) on an incineration tower (101) of a high-temperature critical treatment system for dioxin in waste incineration flue gas, uniformly mixing the waste and calcium amino acid, adding the mixture into an inner cavity of the incineration tower (101), closing the sealing door (110), and injecting reaction liquid into an inner cavity of a liquid storage bin (119) through a liquid adding pipe (126);
step two: starting the flame sprayers (112), enabling a plurality of flame sprayers (112) to release flame to burn the garbage and the calcium amino acid, enabling smoke generated by the garbage to pass through filter holes in the smoke filter plate (113), enabling large-volume fly ash to be blocked by the smoke filter plate (113) or attached to the bottom of the smoke filter plate (113), starting the vibration motor (114), and enabling the smoke filter plate (113) to vibrate by the vibration motor (114) to enable the large-volume fly ash to fall to the bottom of an inner cavity of the burning tower (101);
step three: the flue gas enters an inner cavity of a spraying bin (115) from a flue gas inlet (116) through a first flue pipe (102), an infusion pump (122) is started, the infusion pump (122) operates to pump reaction liquid out of a liquid storage bin (119) through a return pipe (121) and convey the reaction liquid into a spraying pipe (124) through a conveying pipe (123), the reaction liquid is sprayed out from a spray head (130) after filling an arc spraying pipe (128) and a transverse spraying pipe (129), and the reaction liquid sprays the flue gas;
step four: the reaction liquid after the flue gas treatment flows back to the liquid storage bin (119) through the support pipe (120), is filtered by the liquid filter plate (125) and then is circularly sprayed, and the reaction liquid after the flue gas treatment which does not pass through the liquid filter plate (125) is discharged through the drain pipe (127);
step five: the flue gas is discharged from the flue gas outlet (117) and is conveyed to the inner cavity of the cyclone separator (105) in the tangential direction through the second flue pipe (104), the fly ash in the flue gas forms an outer rotational flow and enters the inner cavity of the ash storage tank (134) from the material receiving pipe (132) for storage, and the rest flue gas is conveyed to the inner cavity of the adsorption tank (107) through the third flue pipe (106);
step six: after dioxin in the flue gas is adsorbed by the adsorbent (135) in the inner cavity of the adsorption box (107), the blower (109) is started, the blower (109) operates to pump out the flue gas and convey the flue gas to the smoke exhaust pipe (108) for discharging, and the high-temperature critical treatment process of the dioxin in the waste incineration flue gas is completed.
2. The high-temperature critical treatment system for the dioxin in the waste incineration flue gas is characterized by comprising an incineration tower (101), a first smoke pipe (102), a spraying mechanism (103), a second smoke pipe (104), a cyclone separator (105), a third smoke pipe (106), an adsorption box (107), a smoke exhaust pipe (108) and a blower (109), wherein the first smoke pipe (102) is installed at the top of the incineration tower (101), one end, far away from the incineration tower (101), of the first smoke pipe (102) is connected to one end of the spraying mechanism (103), the second smoke pipe (104) is installed at the top of the spraying mechanism (103), one end, far away from the spraying mechanism (103), of the second smoke pipe (104) is installed at the top of one side of the cyclone separator (105) in the tangential direction, the top of the other side of the cyclone separator (105) is provided with the third smoke pipe (106), one end, far away from the cyclone separator (105), of the third smoke pipe (106) is connected to one end of the adsorption box (107), the other end of the adsorption box (107) is connected to an air inlet of an air blower (109), and an air outlet of the air blower (109) is connected to one side of a smoke exhaust pipe (108).
3. The high-temperature critical treatment system for dioxin in waste incineration flue gas according to claim 2, characterized in that a sealing door (110) is hinged to one side of the incineration tower (101), a medicine supplementing pipe (111) is installed at one end of the top of the incineration tower (101), the bottom end of the medicine supplementing pipe (111) extends into the inner cavity of the incineration tower (101) through one side of the incineration tower (101), a plurality of flame sprayers (112) are installed on the inner wall of the bottom of the incineration tower (101), a flue gas filtering plate (113) is installed at the top of the inner cavity of the incineration tower (101), vibrating motors (114) are installed at both ends of the flue gas filtering plate (113), and two vibrating motors (114) are installed in the inner wall of the incineration tower (101).
4. The high-temperature critical treatment system for dioxin in waste incineration flue gas according to claim 2, wherein the spraying mechanism (103) comprises a spraying bin (115), a smoke inlet (116), a smoke outlet (117), supporting legs (118), a liquid storage bin (119), supporting tubes (120), a return tube (121), an infusion pump (122), and a delivery tube (123), one end of the spraying bin (115) is provided with the smoke inlet (116), the smoke inlet (116) is communicated with a first flue tube (102), the middle position of the top of the spraying bin (115) is provided with the smoke outlet (117), the smoke outlet (117) is communicated with a second flue tube (104), the bottom of the spraying bin (115) is provided with four supporting legs (118), the liquid storage bin (119) is arranged between the four supporting legs (118), and a plurality of supporting tubes (120) are arranged between the bottom of the spraying bin (115) and the liquid storage bin (119), a return pipe (121) is installed at the bottom of the liquid storage bin (119), and one end, far away from the liquid storage bin (119), of the return pipe (121) is connected to a liquid inlet of the liquid infusion pump (122).
5. The high-temperature critical treatment system for dioxin in waste incineration flue gas according to claim 4, wherein a spray pipe (124) is installed in the inner cavity of the spray bin (115), a delivery pipe (123) is installed at the bottom of the spray pipe (124), the delivery pipe (123) penetrates through one of the support pipes (120) and is connected to the liquid outlet of the infusion pump (122), a liquid filter plate (125) is installed in the inner cavity of the liquid storage bin (119), a liquid feeding pipe (126) is installed at the top of one end of the liquid storage bin (119), and a sewage discharge pipe (127) is installed at the bottom of the other end of the liquid storage bin (119).
6. The high-temperature critical treatment system for dioxin in waste incineration flue gas according to claim 5, wherein the spray pipes (124) comprise arc-shaped spray pipes (128) and transverse spray pipes (129), a plurality of arc-shaped spray pipes (128) are arranged side by side, a plurality of transverse spray pipes (129) are installed at the bottoms of the arc-shaped spray pipes (128) in an equal radian, and a plurality of spray heads (130) are installed at the bottoms of the arc-shaped spray pipes (128) and the transverse spray pipes (129).
7. The high-temperature critical treatment system for dioxin in waste incineration flue gas according to claim 2, wherein the cyclone separator (105) is installed on a support frame (131), the bottom end of the cyclone separator (105) is connected with the top end of a material receiving pipe (132) through a bolt, the material receiving pipe (132) is installed on the top of a sealing cover (133), and the sealing cover (133) is connected to the top of an ash storage tank (134) in a buckling mode.
8. The high-temperature critical treatment system for dioxin in waste incineration flue gas according to claim 7, wherein the inner cavity of the ash storage tank (134) is filled with an adsorbent (135), and the adsorbent (135) is one or a mixture of more of activated carbon, pulverized coal and carbon nanotubes in any proportion.
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