CN112856432A - Vortex self-heating type low-temperature dioxin detoxification device and detoxification system - Google Patents
Vortex self-heating type low-temperature dioxin detoxification device and detoxification system Download PDFInfo
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- CN112856432A CN112856432A CN202110292455.5A CN202110292455A CN112856432A CN 112856432 A CN112856432 A CN 112856432A CN 202110292455 A CN202110292455 A CN 202110292455A CN 112856432 A CN112856432 A CN 112856432A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 80
- 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 56
- 238000001784 detoxification Methods 0.000 title claims abstract description 46
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 89
- 239000010881 fly ash Substances 0.000 claims abstract description 50
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 41
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000001816 cooling Methods 0.000 claims abstract description 33
- 239000003546 flue gas Substances 0.000 claims abstract description 33
- 239000002912 waste gas Substances 0.000 claims abstract description 16
- 230000001939 inductive effect Effects 0.000 claims abstract description 13
- 239000002893 slag Substances 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000000428 dust Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 8
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 4
- 239000000460 chlorine Substances 0.000 claims description 4
- 229910052801 chlorine Inorganic materials 0.000 claims description 4
- SMDSYYDAICEBIB-UHFFFAOYSA-N O1C=COC=C1.C1=CC=CC=C1C1=CC=CC=C1 Chemical class O1C=COC=C1.C1=CC=CC=C1C1=CC=CC=C1 SMDSYYDAICEBIB-UHFFFAOYSA-N 0.000 claims description 3
- 239000002956 ash Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 5
- 238000005485 electric heating Methods 0.000 abstract description 4
- 238000000354 decomposition reaction Methods 0.000 abstract description 3
- 239000005416 organic matter Substances 0.000 abstract description 3
- 230000006698 induction Effects 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 150000003071 polychlorinated biphenyls Chemical group 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/027—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
- F23G5/10—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/442—Waste feed arrangements
- F23G5/444—Waste feed arrangements for solid waste
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a vortex self-heating low-temperature dioxin detoxification device, which is characterized by comprising the following components: the device comprises a preheating section, a heating section and a cooling section which are connected, wherein the preheating section is provided with a fly ash feeding port and a waste gas discharge port; the outlet of the preheating section is connected with the inlet of the heating section through a first kiln core connecting device; the heating section is an inductive heating device, and the inductive heating device comprises a heating kiln body structure, an inductive heating coil and an insulating shield around the inductive heating coil from inside to outside; the outlet of the heating section is connected with a cooling section through a second kiln core linking device, and the cooling section is provided with a discharge hole and a nitrogen inlet. The invention also discloses a low-temperature nitrogen replacement detoxification system containing dioxin fly ash. The invention adopts a sectional electric heating mode, can reasonably separate organic matter decomposition, dioxin replacement and cooling slag discharge, adopts a counter-flow flue gas design, heats materials entering a preheating section through discharged waste gas, and has good energy-saving effect.
Description
Technical Field
The invention relates to the field of waste incineration treatment, in particular to a vortex self-heating type low-temperature dioxin detoxification device and a detoxification system.
Background
With the development of industry and the improvement of living standard of people, the amount of generated solid waste is increased year by year. Incineration is the main treatment means of household garbage, and the fly ash production amount in the incineration process accounts for 2% -6% of the incineration garbage. The fly ash contains a large amount of toxic and harmful organic matters such as soluble salts, dioxin and the like, and the ecological environment is greatly threatened if the fly ash is not disposed easily. At present, fly ash is washed, dried and enters a cement kiln for cooperative treatment, and generated wastewater contains toxic and harmful organic matters such as dioxin, so that the treatment process is complex and the cost is high; the cement kiln is regional, the receiving and disposal quantity of the fly ash is limited, and the annual increasing trend of the fly ash production and the annual stockpiling are only cup water salaries. Meanwhile, the high disposal cost limits the process of recycling the fly ash. A typical low-temperature nitrogen replacement detoxification system for fly ash containing dioxin takes electricity as a heat source, and achieves high detoxification efficiency, low energy consumption and extremely small amount of waste gas through reasonable air distribution and accurate process temperature control technology. The technology accords with the development direction of 'no-waste cities' in China, and 'city circular economy' is really realized.
Disclosure of Invention
In order to overcome the defects of the prior art, the aim of recycling fly ash at low cost is fulfilled by aiming at the problem of harmless treatment of physicochemical property of the fly ash, and the vortex self-heating low-temperature dioxin detoxification device and the detoxification system are provided.
A vortex self-heating type low-temperature dioxin detoxification device comprises:
a preheating section, a heating section and a cooling section which are connected,
the preheating section is provided with a fly ash feeding port and a waste gas discharge port;
the outlet of the preheating section is connected with the inlet of the heating section through a first kiln core connecting device;
the heating section is an inductive heating device, and the inductive heating device comprises a heating kiln body structure, an inductive heating coil and an insulating shield around the inductive heating coil from inside to outside;
the outlet of the heating section is connected with a cooling section through a second kiln core connecting device,
the cooling section is provided with a discharge hole and a nitrogen inlet;
the fly ash is preheated in the eddy self-heating low-temperature dioxin detoxification device through the preheating section, reaches the process requirement temperature of 350-450 ℃ in the heating section, decomposes and carbonizes organic matters in the fly ash under the action of oxygen-free and nitrogen gas, so that chlorine in polychlorinated biphenyl (dioxin) is replaced by nitrogen, the dioxin in the fly ash is decomposed and modified, and the detoxification reaction of the fly ash containing the dioxin is completed.
In a preferred embodiment of the invention, a plurality of shoveling plates are arranged at intervals inside the heating kiln body structure.
In a preferred embodiment of the invention, the preheating section comprises a kiln head cover and a preheating cylinder which are connected, and the exhaust gas discharge port is arranged at the upper part of the kiln head cover;
and a screw feeder is arranged on the fly ash feeding hole.
In a preferred embodiment of the invention, the cooling section comprises a connected cooling cylinder and a kiln tail cover which is connected with the tail part of the cooling cylinder in a sealing way;
a nitrogen inlet with a nitrogen regulating valve is arranged on the kiln tail cover;
the lower end of the kiln tail cover is provided with a spiral slag discharging machine.
In a preferred embodiment of the invention, a rotary transmission device is arranged outside the kiln core engagement device to drive the preheating cylinder, the heating cylinder and the cooling cylinder to synchronously rotate; the preheating cylinder, the heating cylinder and the cooling cylinder are connected into a whole through a kiln core connecting device.
A low-temperature nitrogen replacement detoxification system containing dioxin fly ash comprises:
a feeding device for collecting fly ash containing dioxin, wherein a feeding outlet of the feeding device is connected with a fly ash feeding port of the vortex self-heating low-temperature dioxin detoxification device;
the waste gas discharged after the detoxification treatment is carried out by the vortex self-heating low-temperature dioxin detoxification device is introduced into a cyclone dust collector and then discharged into a burnout flue;
discharging the residual high-temperature flue gas after burning organic matters in the waste gas into a gas-gas heat exchanger, introducing normal-temperature nitrogen to indirectly cool the high-temperature flue gas, introducing the cooled high-temperature flue gas into a quench tower to spray water for cooling, raising the temperature of the normal-temperature nitrogen to 350-450 ℃, and introducing a vortex self-heating low-temperature dioxin detoxification device to participate in reaction;
and introducing the low-temperature flue gas subjected to secondary temperature reduction into a dust remover to react with activated carbon to replace and recover valuable metals, deacidifying the residual flue gas by a multistage wet deacidification system, removing moisture in the flue gas by a demister, and discharging the flue gas after reaching the standard.
In a preferred embodiment of the invention, the water removed from the flue gas by the demister is discharged into a multistage wet deacidification system for reuse through a lye circulating water tank.
In a preferred embodiment of the invention, the inlet of the burnout flue is provided with a temperature-controlled burner so that the temperature in the burnout flue is > 1100 ℃.
In a preferred embodiment of the invention, the normal-temperature nitrogen is introduced through a nitrogen making machine connected with the gas-gas heat exchanger and is indirectly heated into high-temperature nitrogen through high-temperature flue gas at the flue gas side of the gas-gas heat exchanger, and the high-temperature nitrogen is nitrogen with the temperature of 350-450 ℃.
In a preferred embodiment of the invention, the ash collected by the cyclone is sent to the feeding device by means of a conveying device and is then reprocessed.
The invention has the beneficial effects that:
the invention adopts a sectional electric heating mode, can reasonably separate organic matter decomposition, dioxin replacement and cooling slag discharge, adopts a counter-flow flue gas design, heats materials entering a preheating section through discharged waste gas, and has good energy-saving effect.
Drawings
Fig. 1 is a flow chart of a low-temperature nitrogen replacement detoxification system for fly ash containing dioxin.
Fig. 2 is a schematic structural view of a vortex self-heating type low-temperature dioxin detoxification device.
Fig. 3 is a schematic structural view of the heating section.
Detailed Description
The system for low-temperature nitrogen displacement detoxification of fly ash containing dioxin as shown in fig. 1-3 comprises a feeding device 100 for collecting fly ash containing dioxin, wherein the feeding device 100 generally adopts a storage bin and a feeding system. The continuous feeding according to the set amount can be ensured.
A feed outlet (not shown) of the feeding device 100 is inserted into the fly ash feed inlet 212 of the vortex self-heating type low-temperature dioxin detoxification device 200. The eddy self-heating type low-temperature dioxin detoxification device 200 comprises a preheating section 220, a heating section 230 and a cooling section 240 which are connected.
The preheating section 220 includes a kiln head housing 210 and a preheating cylinder 222 connected, and a waste gas discharge port 250 is provided at an upper portion of the kiln head housing 210. The kiln hood 210 is also provided with a fly ash inlet 212, and the fly ash inlet 212 is provided with a screw feeder 211.
The cooling section 240 comprises a cooling cylinder 241 and a kiln tail cover 242, wherein the cooling cylinder 241 is connected with the tail of the cooling cylinder 241 through a sealing scale 243, and a nitrogen inlet 261 with a nitrogen regulating valve 260 is arranged on the kiln tail cover 242; the lower end of the kiln tail hood 242 is provided with a spiral slag extractor 270.
The nitrogen gas lets in the pipeline and is equipped with the valve, and nitrogen gas lets in the volume and can show through the flowmeter and coordinate the size adjustment control that opens and shuts of valve, and nitrogen gas lets in the volume control easier, and the fly ash dioxin detoxifies efficiently.
The kiln tail cover is provided with a nitrogen inlet, and the kiln head cover is provided with a waste gas discharge port; the blanking channel is communicated with the kiln tail cover, and the feeding channel is communicated with the kiln head cover; the negative pressure of the kiln head cover and the kiln tail cover is controlled by the induced draft fan, and dust is not generated in the blanking and feeding processes.
By adopting the counter-flow flue gas design, the material entering the preheating section is heated by the discharged waste gas, and the energy-saving effect is good.
The electric heating is adopted, the temperature control is flexible and accurate, the temperature is controlled to +/-10 ℃, and the process temperature interval is ensured; the replacement reaction effect is good, the dioxin removal efficiency is high, and the product is safer. The process temperature is accurately controlled below 500 ℃, which is far lower than the melting temperature of the salt in the fly ash, so that the phenomenon of coking and wall hanging is avoided.
Only the heating section is provided with an inductive coil for heating, and the heating section is a main reaction section for organic matter pyrolysis and dioxin replacement reaction. The cooling section reduces the temperature of slag discharge through heat exchange with materials.
By adopting an electric heating mode, air does not need to be supplemented in the kiln to support fuel combustion, and little waste gas is discharged in the production process. The vortex self-heating low-temperature dioxin detoxification device and the tail gas facility have small volume and low investment; the tail gas treatment cost is low; the smoke discharge loss is less, and the energy consumption is low; meanwhile, the anaerobic state in the eddy self-heating type low-temperature dioxin detoxification device can be ensured, and the decomposition effect of organic matters such as dioxin is improved.
The eddy self-heating rotary kiln is selected, the temperature is quickly increased, and the defects of long start-up and shutdown time and high energy consumption of the traditional fuel kiln are overcome.
The outlet of the preheating section 220 is connected with the inlet of the heating section 230 through a first kiln core engaging device 281;
the heating section 230 is an induction heating device, and the induction heating device comprises a heating kiln body structure 231, an induction heating coil 232 and an insulation shield 233 at the periphery of the induction heating coil from inside to outside. A plurality of shovelling plates 234 are arranged at intervals inside the heating kiln body structure 231.
The heating kiln body structure 231 and the induction heating coil 232 are cylinder structures, and the kiln core engaging device 280, the transmission riding wheel 283 and the power rotating device (not shown in the figure) drive the preheating cylinder body 222, the heating cylinder body 235 and the cooling cylinder body 241 to rotate.
The rotary kiln is adopted, so that continuous production can be realized; the materials are dynamically rolled all the time in the processes of preheating, heating and cooling in the rotary kiln, and can not be adhered and coked; the rotary kiln is internally provided with the frying plate, the fly ash is carried to a high place by the shoveling plate and falls down, the fly ash is always lifted and fully contacted with nitrogen, and the replacement reaction effect is better.
The outlet of the heating section 230 is connected to the cooling section 240 by a second kiln core engaging means 282.
Adopt screw feeder and mucking machine, airtight effectual, the air leakage is few, and nitrogen gas volume is more controllable, reduces the loss of discharging fume.
The fly ash is preheated in the eddy self-heating type low-temperature dioxin detoxification device 200 through the preheating section 220, reaches the process required temperature of 350-450 ℃ in the heating section 230, decomposes and carbonizes organic matters in the fly ash under the action of oxygen-free and nitrogen gas, so that chlorine in polychlorinated biphenyl (dioxin) is replaced by nitrogen, the dioxin in the fly ash is decomposed and modified and is cooled in the cooling section 240, and the detoxification reaction of the fly ash containing the dioxin is completed.
Meanwhile, the normal-temperature nitrogen is heated to the process temperature, so that the replacement effect of chlorine in dioxin (polychlorinated biphenyl) is improved, and the method is energy-saving and more environment-friendly.
The exhaust gas discharged after the detoxification treatment by the vortex self-heating type low-temperature dioxin detoxification device 200 is introduced into the cyclone dust collector 300 and then discharged into the burnout flue 400, the temperature control burner 410 is arranged at the inlet end of the burnout flue 400 to ensure that the temperature of the burnout flue 400 is more than 1100 ℃, and the organic matters carried in the exhaust gas are completely burnt to destroy the secondary synthesis conditions of the dioxin.
The volume of the burnout flue 400 is large, the adiabatic design is adopted, the retention time of waste gas is more than 2 seconds, organic matters carried in the waste gas are burnt in the burnout flue 400, high-temperature flue gas enters the flue gas side of the gas-gas heat exchanger 500, normal-temperature nitrogen generated by the nitrogen making machine 510 enters the air side of the gas-gas heat exchanger 500, the temperature of the normal-temperature nitrogen is heated to 350-450 ℃ through heat exchange, the temperature of the high-temperature flue gas is reduced to be more than 550 ℃, the high-temperature flue gas is introduced into the quenching tower 600 to be sprayed with water for cooling, the temperature of the flue gas is reduced to be less than 200 ℃ within 1 second, and the resynthesis conditions of dioxin are destroyed.
Introducing the low-temperature flue gas subjected to secondary temperature reduction into a dust remover 700 (a bag-type dust remover is usually used) to react with activated carbon to replace and recover valuable metals, introducing the residual flue gas into a multistage wet deacidification system 800 through an induced draft fan 710 for deacidification, removing water in the flue gas through a demister 900, and discharging the flue gas through an exhaust funnel 910 after reaching the standard. The water removed from the flue gas by the demister 900 is discharged to the multistage wet deacidification system 800 through the alkali liquor circulating water tank 810 for reuse.
The arrangement aims at arranging no deacidification system in front of the bag-type dust remover and arranging the activated carbon for spraying; the collecting efficiency is high, the collected valuable metal ash does not contain neutralizing alkali, the metal content is high, and the value is high.
The cyclone dust collector 700 collects the non-detoxified fly ash carried over by the exhaust gas and re-enters the feed bin 100 together with the dioxin-containing fly ash to be treated, thereby preventing the non-reacted fly ash from entering the burnout flue and the tail gas purification facility.
Claims (10)
1. A vortex self-heating low-temperature dioxin detoxification device is characterized by comprising:
a preheating section, a heating section and a cooling section which are connected,
the preheating section is provided with a fly ash feeding port and a waste gas discharge port;
the outlet of the preheating section is connected with the inlet of the heating section through a first kiln core connecting device;
the heating section is an inductive heating device, and the inductive heating device comprises a heating kiln body structure, an inductive heating coil and an insulating shield around the inductive heating coil from inside to outside;
the outlet of the heating section is connected with a cooling section through a second kiln core connecting device,
the cooling section is provided with a discharge hole and a nitrogen inlet;
the fly ash is preheated in the eddy self-heating low-temperature dioxin detoxification device through the preheating section, reaches the process requirement temperature of 350-450 ℃ in the heating section, decomposes and carbonizes organic matters in the fly ash under the action of oxygen-free and nitrogen gas, so that chlorine in polychlorinated biphenyl (dioxin) is replaced by nitrogen, the dioxin in the fly ash is decomposed and modified, and the detoxification reaction of the fly ash containing the dioxin is completed.
2. The eddy current self-heating type low-temperature dioxin detoxification device according to claim 1, wherein a plurality of shoveling plates are arranged at intervals inside the structure of the heating kiln body.
3. The eddy current self-heating type low-temperature dioxin detoxification device according to claim 1, wherein the preheating section comprises a kiln head cover and a preheating cylinder which are connected, and the exhaust gas discharge port is arranged at the upper part of the kiln head cover;
and a screw feeder is arranged on the fly ash feeding hole.
4. The eddy current self-heating type low-temperature dioxin detoxification device according to claim 1, wherein the cooling section comprises a cooling cylinder body and a kiln tail cover hermetically connected with the tail of the cooling cylinder body;
a nitrogen inlet with a nitrogen regulating valve is arranged on the kiln tail cover;
the lower end of the kiln tail cover is provided with a spiral slag discharging machine.
5. The eddy current self-heating type low-temperature dioxin detoxification device according to claim 1, wherein a rotary transmission device is arranged outside the kiln core engagement device to drive the preheating cylinder, the heating cylinder and the cooling cylinder to synchronously rotate.
6. A low-temperature nitrogen replacement detoxification system containing dioxin fly ash is characterized by comprising:
a feeding device for collecting fly ash containing dioxin, a feeding outlet of the feeding device being connected with a fly ash feeding port of the vortex self-heating low-temperature dioxin detoxification device according to any one of claims 1 to 5;
the waste gas discharged after the detoxification treatment is carried out by the vortex self-heating low-temperature dioxin detoxification device is introduced into a cyclone dust collector and then discharged into a burnout flue;
discharging the residual high-temperature flue gas after burning organic matters in the waste gas into a gas-gas heat exchanger, introducing normal-temperature nitrogen to indirectly cool the high-temperature flue gas, introducing the cooled high-temperature flue gas into a quench tower to spray water for cooling, raising the temperature of the normal-temperature nitrogen to 350-450 ℃, and introducing a vortex self-heating low-temperature dioxin detoxification device to participate in reaction;
and introducing the low-temperature flue gas subjected to secondary temperature reduction into a dust remover to react with activated carbon to replace and recover valuable metals, deacidifying the residual flue gas by a multistage wet deacidification system, removing moisture in the flue gas by a demister, and discharging the flue gas after reaching the standard.
7. The dioxin-containing fly ash low-temperature nitrogen displacement detoxification system of claim 6, wherein the water removed from the flue gas by the demister is discharged to a multistage wet deacidification system for reuse through a lye circulating water tank.
8. The dioxin-containing fly ash low-temperature nitrogen displacement detoxification system according to claim 6, wherein the inlet of the burnout flue is provided with a temperature-controlled burner so that the temperature in the burnout flue is more than 1100 ℃.
9. The system for low-temperature nitrogen replacement detoxification of dioxin-containing fly ash according to claim 6, wherein the normal temperature nitrogen is introduced through a nitrogen generator connected to the gas-gas heat exchanger and is heated into high temperature nitrogen through high temperature flue gas at the flue gas side of the gas-gas heat exchanger, and the high temperature nitrogen is nitrogen with the temperature of 350 ℃ to 450 ℃.
10. The system of claim 6, wherein the ash collected by the cyclone is sent to the feeding device through a conveying device and then is treated again.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110292455.5A CN112856432A (en) | 2021-03-18 | 2021-03-18 | Vortex self-heating type low-temperature dioxin detoxification device and detoxification system |
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| CN202110292455.5A CN112856432A (en) | 2021-03-18 | 2021-03-18 | Vortex self-heating type low-temperature dioxin detoxification device and detoxification system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113617807A (en) * | 2021-08-20 | 2021-11-09 | 北科蕴宏环保科技(北京)有限公司 | Novel waste incineration fly ash pyrolysis system and method |
| CN113617805A (en) * | 2021-08-20 | 2021-11-09 | 北科蕴宏环保科技(北京)有限公司 | System and method for low-temperature heat treatment of fly ash |
| CN113634584A (en) * | 2021-08-20 | 2021-11-12 | 北科蕴宏环保科技(北京)有限公司 | Novel fly ash heat treatment method and device |
| CN113669731A (en) * | 2021-08-20 | 2021-11-19 | 北科蕴宏环保科技(北京)有限公司 | High-efficiency fly ash heat treatment method and device |
| CN117086080A (en) * | 2023-08-23 | 2023-11-21 | 浙江京兰环保科技有限公司 | Waste incineration fly ash dioxin pyrolysis system |
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2021
- 2021-03-18 CN CN202110292455.5A patent/CN112856432A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113617807A (en) * | 2021-08-20 | 2021-11-09 | 北科蕴宏环保科技(北京)有限公司 | Novel waste incineration fly ash pyrolysis system and method |
| CN113617805A (en) * | 2021-08-20 | 2021-11-09 | 北科蕴宏环保科技(北京)有限公司 | System and method for low-temperature heat treatment of fly ash |
| CN113634584A (en) * | 2021-08-20 | 2021-11-12 | 北科蕴宏环保科技(北京)有限公司 | Novel fly ash heat treatment method and device |
| CN113669731A (en) * | 2021-08-20 | 2021-11-19 | 北科蕴宏环保科技(北京)有限公司 | High-efficiency fly ash heat treatment method and device |
| CN113617805B (en) * | 2021-08-20 | 2022-06-03 | 北科蕴宏环保科技(北京)有限公司 | System and method for low-temperature heat treatment of fly ash |
| CN117086080A (en) * | 2023-08-23 | 2023-11-21 | 浙江京兰环保科技有限公司 | Waste incineration fly ash dioxin pyrolysis system |
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