CN111689497A - Dangerous waste carbon energy-saving activation regeneration system capable of inhibiting generation of dioxin - Google Patents
Dangerous waste carbon energy-saving activation regeneration system capable of inhibiting generation of dioxin Download PDFInfo
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- CN111689497A CN111689497A CN202010692752.4A CN202010692752A CN111689497A CN 111689497 A CN111689497 A CN 111689497A CN 202010692752 A CN202010692752 A CN 202010692752A CN 111689497 A CN111689497 A CN 111689497A
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- 238000011069 regeneration method Methods 0.000 title claims abstract description 64
- 230000008929 regeneration Effects 0.000 title claims abstract description 59
- 230000004913 activation Effects 0.000 title claims abstract description 42
- 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 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 153
- 229910052799 carbon Inorganic materials 0.000 title claims description 80
- 239000002699 waste material Substances 0.000 title claims description 57
- 230000002401 inhibitory effect Effects 0.000 title claims description 14
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000004202 carbamide Substances 0.000 claims abstract description 42
- 238000002485 combustion reaction Methods 0.000 claims abstract description 28
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- 239000003610 charcoal Substances 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims description 72
- 238000001994 activation Methods 0.000 claims description 51
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- 239000012071 phase Substances 0.000 claims description 43
- 238000010521 absorption reaction Methods 0.000 claims description 25
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- 238000010791 quenching Methods 0.000 claims description 22
- 230000000171 quenching effect Effects 0.000 claims description 21
- 238000001704 evaporation Methods 0.000 claims description 20
- 230000008020 evaporation Effects 0.000 claims description 20
- 239000002920 hazardous waste Substances 0.000 claims description 17
- 239000007790 solid phase Substances 0.000 claims description 17
- 239000002918 waste heat Substances 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 9
- 239000007792 gaseous phase Substances 0.000 claims description 7
- 230000003009 desulfurizing effect Effects 0.000 claims description 6
- 229910000765 intermetallic Inorganic materials 0.000 claims description 3
- 239000007791 liquid phase Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 210000003437 trachea Anatomy 0.000 claims description 2
- 239000003546 flue gas Substances 0.000 abstract description 34
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 32
- 239000000126 substance Substances 0.000 abstract description 24
- 230000000185 dioxinlike effect Effects 0.000 abstract description 7
- 239000000779 smoke Substances 0.000 abstract description 3
- 230000014759 maintenance of location Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 25
- 239000002245 particle Substances 0.000 description 12
- 239000003513 alkali Substances 0.000 description 10
- 239000000843 powder Substances 0.000 description 10
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- 239000002585 base Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 8
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- 238000001179 sorption measurement Methods 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
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- 150000001875 compounds Chemical class 0.000 description 3
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- 239000002253 acid Substances 0.000 description 2
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- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 description 2
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- 125000003118 aryl group Chemical group 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
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- 235000019580 granularity Nutrition 0.000 description 1
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/354—After-treatment
- C01B32/36—Reactivation or regeneration
- C01B32/366—Reactivation or regeneration by physical processes, e.g. by irradiation, by using electric current passing through carbonaceous feedstock or by using recyclable inert heating bodies
-
- 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
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3416—Regenerating or reactivating of sorbents or filter aids comprising free carbon, e.g. activated carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3483—Regenerating or reactivating by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
- F27D13/002—Preheating scrap
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The utility model provides a can restrain energy-conserving activation regeneration system of dangerous useless charcoal of dioxin generation, including useless charcoal regeneration unit, tail gas processing unit includes the buffer tank, two combustion chambers, exhaust-heat boiler, the denitration part, two combustion chambers include outer furnace body, interior furnace body, the coaxial suit of interior furnace body is in outer furnace body, the inner wall of interior furnace body forms annular preheating chamber with the inner wall of outer furnace body, the export of buffer tank passes through the bottom intercommunication of pipeline and inner furnace body, the annular preheating chamber between the outer furnace body, exhaust-heat boiler's entry passes through the pipeline and communicates with the bottom of inner furnace body inner chamber, the denitration part includes urea agitator tank, the circulating pump, urea solution storage tank, the measuring pump, urea atomizing nozzle is in order to spout the furnace of exhaust-heat boiler with the urea solution after atomizing, organic substance in the tail gas sends into two combustion chambers complete combustion and forms the flue gas, the flue, the smoke retention time is more than 2s, and the generation of dioxin-like substances can be inhibited.
Description
Technical Field
The invention relates to the technical field of solid waste harmless treatment equipment, in particular to a dangerous waste carbon energy-saving activation regeneration system capable of inhibiting generation of dioxin.
Background
The activated carbon is a good carbon-based adsorption material and is an industrial adsorbent with wide application. The activated carbon loses its activity as the adsorption amount increases, and becomes a hazardous waste because it contains harmful components. The regeneration of the activated carbon means that the carbon which loses activity after being adsorbed and wasted is treated by physical, chemical or biochemical methods and the like, and the adsorption performance of the carbon is recovered to achieve the aim of recycling. The regeneration method of the activated carbon comprises thermal regeneration, chemical regeneration, biological regeneration, a novel supercritical fluid regeneration method, an electrochemical regeneration method, a photocatalytic regeneration method, a microwave radiation heating method and the like. The heating regeneration process utilizes the characteristic that adsorbate in the adsorbed dangerous waste carbon can be desorbed from pores of the active carbon at high temperature, so that the originally blocked pores of the active carbon are opened, and the adsorption performance of the active carbon is recovered. Heating regeneration is a mainstream regeneration method because it can decompose various adsorbates, and thus has versatility and thorough regeneration. The heating regeneration device has many forms, the heating regeneration device mainly used in China at present is a rotary kiln, a fluidized bed and a fluidized bed, the drying is needed in the initial stage no matter what form of heating regeneration device is adopted, the active carbon to be regenerated is generally filter cake-shaped and paste-shaped materials with various granularities and high water content, and the drying equipment aiming at the characteristic materials is not found in China at present. In the activation process, the rotary kiln needs to use primary energy, electric power and other high-grade energy as heating energy, the energy consumption is high, a fluidized bed or a fluidized bed is adopted, the conventional gas-solid separation device is a bag-type dust collector, and the regenerated activated carbon can be subjected to gas-solid separation only after being cooled because the bag-type dust collector is not resistant to high temperature, so that the energy consumption is high. The tail gas generated in the regeneration process of the activated carbon contains a plurality of harmful substances, wherein dioxin is used as a pollutant with extremely strong toxicity, has a high melting point, no polarity and is insoluble in water, the dioxin is stable in strong acid and strong alkali and can exist in the environment for a long time, and the solubility and volatility of PCDD/Fs are reduced along with the enhancement of the chlorination degree. The effects of microbial degradation, hydrolysis and photodecomposition in the natural environment have little influence on the molecular structure of dioxin, so that the harmless treatment of the dioxin in the tail gas becomes a difficult problem to be solved urgently in the activated carbon regeneration technology.
Disclosure of Invention
In view of the above, it is necessary to provide an energy-saving activation and regeneration system for hazardous waste carbon with low energy consumption, which can suppress the generation of dioxin.
The utility model provides a dangerous waste carbon energy-saving activation regeneration system that can restrain dioxin formation, includes waste carbon regeneration unit, tail gas processing unit, waste carbon regeneration unit includes flash dryer, cyclone, second metallic film bag filter, dynamic regeneration stove, first metallic film bag filter, negative-pressure air fan, flash dryer includes flash drying body, air inlet distributor, be equipped with solid phase entry on the flash drying body rampart, flash drying body top is equipped with the gaseous phase export, overlaps at flash drying body outside bottom and establishes the air inlet distributor, the air inlet distributor is the hollow ring body, be equipped with the gaseous phase entry on the outside rampart of air inlet distributor, the inboard rampart of air inlet distributor is equipped with the wind gap, is equipped with a plurality of slits on the flash drying body lateral wall, the slit is along the circumference equipartition of flash drying body, the export and the flash drying body inner chamber intercommunication of slit, the outlet of the slit is along the tangential direction of the flash evaporation drying body, the inlet of the slit is connected with the air port of the air inlet distributor, the gas phase outlet of the flash evaporation drying body is connected with the gas phase inlet of the side part of the cyclone dust collector, the gas phase outlet of the top part of the cyclone dust collector is connected with the gas phase inlet of the side part of the second metal film bag filter, the inlet of the negative pressure fan is connected with the gas phase outlet of the top part of the second metal film bag filter, the dynamic regeneration furnace is a door-shaped hollow cylinder, the dynamic regeneration furnace comprises a carbonization section, a connection section and an activation section, the solid phase outlet of the bottom part of the cyclone dust collector is connected with the solid phase inlet of the side part of the carbonization section, the solid phase outlet of the bottom part of the second metal film bag filter is connected with the solid phase inlet of the side part of the carbonization section, the gas phase inlet is arranged at the lower part of the carbonization, the other end of the connecting section is connected with a gas phase inlet at the top of the activation section, a gas phase outlet at the lower part of the activation section is connected with a gas phase inlet at the side part of the first metal film bag filter, a gas phase outlet at the top of the first metal film bag filter is connected with a gas phase inlet of the air inlet distributor, the tail gas treatment unit comprises a buffer tank, a secondary combustion chamber, a waste heat boiler and a denitration component, an inlet of the buffer tank is connected with an outlet of a negative pressure fan, the secondary combustion chamber comprises an outer furnace body and an inner furnace body, the outer furnace body is hollow, the inner furnace body is a hollow cylinder with an open top, the inner furnace body is coaxially sleeved in the outer furnace body, the lower end surface of the inner furnace body is contacted with the bottom surface of the outer furnace body, the upper end surface of the inner furnace body is not contacted with the top surface of the inner furnace body, the outer diameter of the inner furnace body is smaller than the, the export of buffer tank passes through the bottom intercommunication in the annular preheating chamber between pipeline and interior furnace body, the outer furnace body, exhaust-heat boiler's entry passes through the bottom intercommunication of pipeline and interior furnace body inner chamber, the denitration part includes urea agitator tank, circulating pump, urea solution storage tank, measuring pump, urea atomizing nozzle, the export of urea agitator tank and the entry linkage of circulating pump, the exit of circulating pump and the entry linkage of urea solution storage tank, the exit storehouse of urea solution storage tank and the entry linkage of measuring pump, the export of measuring pump and the liquid phase entry linkage of urea atomizing nozzle, the gaseous phase entry of urea atomizing nozzle is used for letting in highly-compressed air, urea atomizing nozzle spouts exhaust-heat boiler's furnace with the urea solution after will atomizing.
Preferably, the flash drying machine still includes hierarchical ring, breaks up the subassembly, the flash drying body is the cavity barrel, installs hierarchical ring on the upper portion of flash drying body inner chamber, is equipped with the toper bottom surface in the bottom of flash drying body inner chamber, break up the subassembly including breaking up main shaft, driving motor, breaking up the blade, break up the lower extreme of main shaft and driving motor's output coaxial coupling, break up the vertical toper bottom surface that upwards passes the flash drying body in main shaft upper end, break up the blade and set firmly in the upper end of breaking up the main shaft.
Preferably, the flash drying machine still includes base, compressed gas subassembly, the compressed gas subassembly includes air pump, trachea, on the base was arranged in to the flash drying body, formed confined bottom chamber between the upper surface of base and the toper bottom surface of flash drying body, driving motor sets firmly on the base, break up the vertical toper bottom surface that upwards passes base and the dry body of evaporation to dryness in main shaft upper end, it passes through the bearing and is connected with the base rotation to break up the main shaft, the export of air pump is connected with tracheal one end, tracheal other end and bottom chamber intercommunication.
Preferably, the second combustion chamber further comprises a checker brick and a gas proportion adjusting burner, the lower part of the inner side of the outer furnace body is a cylindrical cavity, the upper part of the inner side of the outer furnace body is a tapered cavity, a fire hole is formed in the top of the outer furnace body, the checker brick is filled in the inner furnace body, the gas proportion adjusting burner is installed at the top of the outer furnace body, a nozzle of the gas proportion adjusting burner is connected with the fire hole of the outer furnace body, a labyrinth brick joint is formed between the checker brick and the checker brick, an explosion-proof hole is further formed in the top of the outer furnace body, and an explosion-proof cover covers the explosion-proof hole.
Preferably, the flash dryer is a spin flash dryer, and the first metal film bag filter and the second metal film bag filter are both intermetallic compound asymmetric dust collectors.
Preferably, the waste carbon regeneration unit further comprises a tower-type cooling bed, and an inlet of the tower-type cooling bed is connected with a solid phase outlet at the bottom of the first metal film bag filter.
Preferably, a steam outlet of the waste heat boiler is communicated with an inner cavity of the activation section through a pipeline.
Preferably, the tail gas treatment unit further comprises a quenching absorption tower, and an inlet of the quenching absorption tower is connected with an outlet of the waste heat boiler.
Preferably, the tail gas treatment unit further comprises a bag-type dust remover, and an inlet of the bag-type dust remover is connected with an outlet of the quenching absorption tower.
Preferably, the tail gas treatment unit further comprises a desulfurizing tower, and an inlet of the desulfurizing tower is connected with an outlet of the bag dust collector.
The invention has the beneficial effects that:
(1) the regenerated active carbon and the tail gas are subjected to gas-solid separation by cloth bag dust removal, and due to the fact that the temperature of the tail gas is high, cloth bag dust removal equipment can be burnt out, so that the gas-solid separation can be carried out only after the active carbon and the tail gas are cooled, and further the heat energy of the tail gas cannot be utilized.
(2) The hazardous waste carbon powder is dried by using a flash evaporation dryer, the water content of the dried hazardous waste carbon can be stabilized at about 10%, the part of residual water can react with trace residual organic matters in the hazardous waste carbon in the activation stage, and the part of residual water is not beneficial to activation due to overhigh or overlow content.
(3) The gas-solid separation rate of the first metal film bag filter is more than 99.99%, the regenerated active carbon micro powder entering the flash evaporation dryer together with the tail gas is very little, and the problem that the water content of the dried dangerous waste carbon is reduced after a large amount of regenerated active carbon micro powder enters the flash evaporation dryer so as to influence the activation process is avoided.
(4) In the gas-solid separation process of the first metal film bag filter, activated carbon powder is adhered to the microporous metal film filter material of the first metal film bag filter, organic gas in tail gas can be absorbed by the activated carbon powder, the situation that the organic gas returns to a dynamic activation furnace after passing through a flash evaporation dryer and reacts with residual water of dried dangerous waste carbon is avoided, the water content of the dried dangerous waste carbon is indirectly reduced, and the activation process is influenced.
(5) Utilize flash distillation desiccator to carry out the drying to dangerous waste carbon, dangerous waste carbon dispersibility is good, and in carbonization, activation process, dangerous waste carbon is dilute phase pneumatic conveying for dangerous waste carbon activation reaction time is short, and the reaction is more abundant, and whole journey is in the encapsulated situation, and dangerous waste carbon can maintain whole device temperature basically in the reaction heat of carbonization, activation process, and the energy consumption is very low.
(6) Utilize flash dryer to carry out the drying to dangerous waste carbon, dangerous waste carbon particle size after the drying can be stabilized in a predetermined within range, and dangerous waste carbon particle size is controllable, is favorable to guaranteeing that the dangerous waste carbon fluidization state in the dynamic activation is stable to make carbonization, activation process stable.
(7) The secondary combustion chamber is reasonable in air distribution, sufficient in gas mixing, high in turbulence degree and free of dead zones, organic substances in tail gas are sent into the secondary combustion chamber to be completely combusted, organic substances in the tail gas are sent into the secondary combustion chamber to be completely combusted to form flue gas, the temperature of the flue gas reaches 1200 ℃, the residence time of the flue gas is more than 2s, harmful odor and polychlorinated compounds can be fully decomposed, generation of dioxin-like substances is inhibited, and finally a small molecular substance C0 is generated2、S02、N0X、H2O, and the like.
(8) Urea water solution is sprayed into a hearth of the waste heat boiler by using a urea atomizing nozzle, the flue gas is fully mixed with the sprayed atomized urea solution, and NO in the flue gasXWith the component O2In the presence of (B) is reduced to N2And water is mixed, and at the same time, the water content of the urea solution is completely vaporized and taken away by the flue gas, so that the aims of removing and reducing the nitrogen oxides in the flue gas are fulfilled.
Drawings
Fig. 1 is an isometric view of the hazardous waste carbon energy-saving activation regeneration system capable of inhibiting the generation of dioxin.
Fig. 2 is a schematic structural view of the denitration part.
Fig. 3 is a schematic structural view of the flash dryer.
Fig. 4 is a partially cut-away view of the second combustion chamber.
In the figure: the waste carbon regeneration unit 10, the flash dryer 11, the flash drying body 111, the tapered bottom 1111, the grading ring 112, the breaking component 113, the breaking main shaft 1131, the driving motor 1132, the breaking blade 1133, the air inlet distributor 114, the base 115, the compressed gas component 116, the air pump 1161, the air pipe 1162, the cyclone 12, the second metal film bag filter 13, the dynamic regeneration furnace 14, the carbonization section 141, the connection section 142, the activation section 143, the first metal film bag filter 15, the negative pressure fan 16, the tower cooling bed 17, the tail gas treatment unit 20, the buffer tank 21, the secondary combustion chamber 22, the outer furnace body 221, the inner furnace body 222, the lattice brick 223, the gas proportional control burner 224, the waste heat boiler 23, the quenching absorption tower 24, the cloth bag filter 25, the desulfurization tower 26, the bag dust remover part 27, the urea stirring tank 271, the circulating pump 272, the urea solution storage tank 273, the metering pump 274, the dioxin treatment part 28, the waste carbon regeneration part, the dynamic regeneration, An activated carbon silo 281.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Referring to fig. 1 to 4, an embodiment of the present invention provides an energy-saving activation regeneration system for hazardous waste carbon capable of inhibiting generation of dioxin, including a waste carbon regeneration unit 10 and a tail gas treatment unit 20, where the waste carbon regeneration unit 10 includes a flash dryer 11, a cyclone 12, a second metal film bag filter 13, a dynamic regeneration furnace 14, a first metal film bag filter 15, and a negative pressure fan 16, the flash dryer 11 includes a flash drying body 111 and an air inlet distributor 114, a solid phase inlet is disposed on an annular wall of the flash drying body 111, a gas phase outlet is disposed at a top of the flash drying body 111, the air inlet distributor 114 is sleeved at a bottom of an outer side of the flash drying body 111, the air inlet distributor 114 is a hollow annular body, a gas phase inlet is disposed on an outer annular wall of the air inlet distributor 114, an inner annular wall of the air inlet distributor 114 is provided with an air port, a plurality of slits are disposed on a side wall of the, the slits are uniformly distributed along the circumferential direction of the flash evaporation drying body 111, the outlet of the slits is communicated with the inner cavity of the flash evaporation drying body 111, the outlet of the slits is along the tangential direction of the flash evaporation drying body 111, the inlet of the slits is connected with the air inlet of the air inlet distributor 114, the gas phase outlet of the flash evaporation drying body 111 is connected with the gas phase inlet of the side part of the cyclone dust collector 12, the gas phase outlet of the top part of the cyclone dust collector 12 is connected with the gas phase inlet of the side part of the second metal film bag filter 13, the inlet of the negative pressure fan 16 is connected with the gas phase outlet of the top part of the second metal film bag filter 13, the dynamic regeneration furnace 14 is a 'door' -shaped hollow cylinder body, the dynamic regeneration furnace 14 comprises a carbonization section 141, a connection section 142 and an activation section 143, the solid phase outlet of the bottom part of the cyclone dust collector 12 is connected with the solid phase inlet of the side part of the carbonization, the lower part of the carbonization section 141 is provided with a gas phase inlet, a gas phase outlet at the top of the carbonization section 141 is connected with one end of the connecting section 142, the other end of the connecting section 142 is connected with the gas phase inlet at the top of the activation section 143, a gas phase outlet at the lower part of the activation section 143 is connected with the gas phase inlet at the side part of the first metal film bag filter 15, the gas phase outlet at the top of the first metal film bag filter 15 is connected with the gas phase inlet of the air inlet distributor 114, the tail gas processing unit 20 comprises a buffer tank 21, a secondary combustion chamber 22, a waste heat boiler 23 and a denitration part 27, the inlet of the buffer tank 21 is connected with the outlet of the negative pressure fan 16, the secondary combustion chamber 22 comprises an outer furnace body 221 and an inner furnace body 222, the outer furnace body 221 is hollow, the inner furnace body 222 is a hollow cylinder with an open top, the inner furnace body 222 is coaxially sleeved in the outer furnace body 221, the lower end surface of the inner furnace body, the outer diameter of the inner furnace body 222 is smaller than the inner diameter of the outer furnace body 221, the inner wall of the inner furnace body 222 and the inner wall of the outer furnace body 221 form an annular preheating cavity, the outlet of the buffer tank 21 is communicated with the bottom of the annular preheating cavity between the inner furnace body 222 and the outer furnace body 221 through a pipeline, the inlet of the waste heat boiler 23 is communicated with the bottom of the inner cavity of the inner furnace body 222 through a pipeline, the denitration part 27 comprises a urea stirring tank 271 and a circulating pump 272, urea solution storage tank 273, measuring pump 274, urea atomizing nozzle, the export of urea agitator tank 271 and the entry linkage of circulating pump 272, the export of circulating pump 272 and the entry linkage of urea solution storage tank 273, the export storehouse of urea solution storage tank 273 and the entry linkage of measuring pump 274, the export of measuring pump 274 and the liquid phase entry linkage of urea atomizing nozzle, the gaseous phase entry of urea atomizing nozzle is used for letting in highly-compressed air, urea atomizing nozzle is in order to spout the furnace of exhaust-heat boiler 23 with the urea solution after the atomizing.
In the drying process of the dangerous waste carbon, pore water is mainly evaporated, and volatile organic substances such as adsorbed micromolecule hydrocarbon, aromatic organic substances and the like are desorbed and separated to enter tail gas.
Under the condition of high temp., the residual organic substances in the dangerous waste carbon are volatilized, decomposed, carbonized and oxidized, and then removed from the matrix of the dangerous waste carbon, and converted into organic gas, and then fed into tail gas.
The trace amount of residual organic matter is activated by the residual water and the supplementary oxidizing gas such as water vapor to produce CO and CO2、H2And nitrogen oxide and the like are decomposed and desorbed from the dangerous waste carbon.
Specifically, the denitration unit 27 is disposed at the first return of the exhaust-heat boiler 23, that is, in a 900 ℃ to 1050 ℃ region in the furnace of the exhaust-heat boiler 23.
The invention has the beneficial effects that:
(1) the regenerated active carbon and the tail gas are subjected to gas-solid separation by cloth bag dust removal, the cloth bag dust removal equipment can be burnt out due to the high temperature of the tail gas, so that the gas-solid separation can be carried out only after the active carbon and the tail gas are cooled, and further the heat energy of the tail gas cannot be utilized.
(2) The dangerous waste carbon powder is dried by using the flash evaporation dryer 11, the water content of the dried dangerous waste carbon can be stabilized at about 10%, the part of residual water can react with trace residual organic matters in the dangerous waste carbon in the activation stage, and the part of residual water is not beneficial to activation due to overhigh or overlow content.
(3) The gas-solid separation rate of the first metal film bag filter 15 is more than 99.99%, the regenerated active carbon micro powder entering the flash evaporation dryer 11 together with the tail gas is very little, and the problem that the water content of the dried dangerous waste carbon is reduced after a large amount of regenerated active carbon micro powder enters the flash evaporation dryer 11, and the activation process is influenced is avoided.
(4) In the process of gas-solid separation, the first metal film bag filter 15 has activated carbon powder adhered to the microporous metal film filter material of the first metal film bag filter 15, and organic gas in the tail gas can be absorbed by the activated carbon powder, so that the organic gas is prevented from returning to the dynamic activation furnace after passing through the flash evaporation dryer 11 and reacting with residual water of the dried dangerous waste carbon, the water content of the dried dangerous waste carbon is indirectly reduced, and the activation process is influenced.
(5) Utilize flash dryer 11 to carry out the drying to dangerous waste carbon, dangerous waste carbon dispersibility is good, and in carbonization, activation process, dangerous waste carbon is dilute phase pneumatic conveying for dangerous waste carbon activation reaction time is short, and the reaction is more abundant, and whole journey is in the encapsulated situation, and dangerous waste carbon can maintain whole device temperature in the reaction heat of carbonization, activation process basically, and the energy consumption is very low.
(6) Utilize flash dryer 11 to carry out the drying to dangerous waste carbon, dangerous waste carbon particle size after the drying can be stabilized in a predetermined within range, and dangerous waste carbon particle size is controllable, is favorable to guaranteeing that the dangerous waste carbon fluidization state in the dynamic activation is stable to make carbonization, activation process stable.
(7) The secondary combustion chamber 22 is reasonable in air distribution, sufficient in gas mixing, high in turbulence degree and free of dead zones, organic substances in tail gas are sent into the secondary combustion chamber 22 to be completely combusted, organic substances in the tail gas are sent into the secondary combustion chamber 22 to be completely combusted to form flue gas, the temperature of the flue gas reaches 1200 ℃, the residence time of the flue gas is more than 2s, harmful odor and polychlorinated compounds can be fully decomposed, generation of dioxin-like substances is inhibited, and finally a small molecular substance C0 is generated2、S02、N0X、H2O, and the like.
(8) Urea water solution is sprayed into the hearth of the waste heat boiler 23 by using a urea atomizing nozzle, the flue gas is fully mixed with the sprayed atomized urea solution, and NO in the flue gasXWith the component O2In the presence of (B) is reduced to N2And water is mixed, and at the same time, the water content of the urea solution is completely vaporized and taken away by the flue gas, so that the aims of removing and reducing the nitrogen oxides in the flue gas are fulfilled.
Referring to fig. 1 and 3, further, the flash dryer 11 further includes a grading ring 112 and a scattering assembly 113, the flash drying body 111 is a hollow cylinder, the grading ring 112 is installed on the upper portion of the inner cavity of the flash drying body 111, a conical bottom surface 1111 is arranged at the bottom of the inner cavity of the flash drying body 111, the scattering assembly 113 includes a scattering main shaft 1131, a driving motor 1132 and a scattering blade 1133, the lower end of the scattering main shaft 1131 is coaxially connected with the output end of the driving motor 1132, the upper end of the scattering main shaft 1131 vertically and upwardly penetrates through the conical bottom surface 1111 of the flash drying body 111, and the scattering blade 1133 is fixedly arranged at the upper end of the scattering main shaft 1131.
Dangerous waste carbon gets into flash drying body 111 by the screw feeder in, breaks up under the effect of blade 1133, and dangerous waste carbon obtains the dispersion under the effect that receives the striking, rubs and cuts, and cubic dangerous waste carbon is smashed, fully contacts with hot-air, is heated, is dry. The dehydrated dry powder material rises along with hot gas, the grading ring 112 intercepts large particles, small particles are discharged out of the dryer from the center of the ring and are recovered by the cyclone dust collector 12 and the second metal film bag filter 13, large dangerous waste carbon which is not dried thoroughly is thrown to the inner wall of the flash evaporation drying body 111 under the action of centrifugal force, and falls to the bottom of the flash evaporation drying body 111 again to be crushed and dried. The flash evaporation dryer 11 integrates drying and crushing, so that materials in paste and filter cake shapes with different particle sizes are quickly dried into powder at one time, the heat and mass transfer time in the drying process is short, the drying strength is high, the heat efficiency is high, and the particle size and the humidity of the obtained dry powder are controllable.
Referring to fig. 1 and 3, further, the flash dryer 11 further includes a base 115 and a compressed air assembly 116, the compressed air assembly 116 includes an air pump 1161 and an air pipe 1162, the flash drying body 111 is disposed on the base 115, a closed bottom cavity is formed between an upper surface of the base 115 and a tapered bottom surface 1111 of the flash drying body 111, a driving motor 1132 is fixedly disposed on the base 115, an upper end of a scattering spindle 1131 vertically penetrates the base 115 and the tapered bottom surface 1111 of the dry drying body upwards, the scattering spindle 1131 is rotatably connected with the base 115 through a bearing, an outlet of the air pump 1161 is connected with one end of the air pipe 1162, and the other end of the air pipe 1162 is communicated with the bottom cavity.
The compressed air assembly 116 is arranged to ensure that the flash dryer 11 does not leak materials to the bottom cavity, the damage rate of the bearing is reduced, compressed air enters the flash drying body 111 through a gap between the scattering main shaft 1131 and the conical bottom surface 1111, the speed of dangerous waste carbon powder carried by a rotating wind field in the flash drying body 111 can be interfered, the speed of the dangerous waste carbon powder is prevented from being close to the speed of the scattering blades 1133, and therefore the reduction of the crushing efficiency caused by the reduction of the relative speed of the dangerous waste carbon powder and the scattering blades 1133 is avoided.
Referring to fig. 1 and 4, the second combustion chamber 22 further comprises lattice bricks 223 and a gas proportion adjusting burner 224, the lower part of the inner side of the outer furnace body 221 is a cylindrical cavity, the upper part of the inner side of the outer furnace body 221 is a tapered cavity, a fire hole is arranged at the top of the outer furnace body 221, the lattice bricks 223 are filled in the inner furnace body 222, the gas proportion adjusting burner 224 is arranged at the top of the outer furnace body 221, a nozzle of the gas proportion adjusting burner 224 is connected with the fire hole of the outer furnace body 221, a labyrinth brick seam is formed between the lattice bricks 223 and the lattice bricks 223, explosion-proof holes are further arranged at the top of the outer furnace body 221, and explosion-proof covers are covered on the explosion-proof holes.
The brick joints between the checker bricks 223 and the checker bricks 223 are in a labyrinth shape, so that the mixing effect of the tail gas and the combustion-supporting gas is better.
The tail gas firstly enters the bottom of the annular preheating cavity between the inner furnace body 222 and the outer furnace body 221, then flows upwards along the outer wall of the inner furnace body 222, is preheated by the inner furnace body 222 in the upward flowing process, and after being preheated, the tail gas is favorable for entering the inner furnace body 222 for full combustion, and the heat transfer of the inner furnace body 222 to the outer furnace body 221 is blocked, so that the heat loss of the secondary combustion chamber 22 is avoided.
After entering the annular preheating cavity, the tail gas turns 90 degrees to flow upwards along the outer wall of the inner furnace body 222, flows upwards along the outer wall of the inner furnace body 222 to meet the top wall of the outer furnace body 221, then turns 180 degrees, and flows in a zigzag manner in the secondary combustion chamber 22, so that the tail gas is in a turbulent flow state in the secondary combustion chamber 22, and the hot tail gas in the turbulent flow state and the high-temperature combustion-supporting gas which is jetted downwards along the axial direction of the inner furnace body 222 by the gas proportion adjusting burner 224 can be fully mixed and further fully combusted.
The upper portion of outer furnace body 221 is the toper, and tail gas can form downward rotatory air current along outer furnace body 221 toper rampart flow in-process, and rotatory air current is abundant dispersion in inner furnace body 222 for the tail gas does not have the brick seam between blind spot entering checker brick 223 and the checker brick 223 of dead zone, and the tail gas gets into the brick seam after, further fully mixes with combustion-supporting gas, has strengthened the burning.
The secondary combustion chamber 22 is reasonable in air distribution, sufficient in gas mixing, high in turbulence degree and free of dead zones, organic substances in tail gas are sent into the secondary combustion chamber 22 to be completely combusted, organic substances in the tail gas are sent into the secondary combustion chamber 22 to be completely combusted to form flue gas, the temperature of the flue gas reaches 1200 ℃, the residence time of the flue gas is more than 2s, harmful odor and polychlorinated compounds can be fully decomposed, generation of dioxin-like substances is inhibited, and finally a small molecular substance C0 is generated2、S02、N0X、H2O, and the like.
Referring to fig. 1, further, the flash dryer 11 is a spin flash dryer 11, and the first metal film bag filter 15 and the second metal film bag filter 13 are both an asymmetric dust scrubber for intermetallic compounds.
Referring to fig. 1, further, the waste carbon regeneration unit 10 further comprises a tower cooling bed 17, and an inlet of the tower cooling bed 17 is connected with a solid phase outlet at the bottom of the first metal film bag filter 15.
Referring to fig. 1, further, the steam outlet of the waste heat boiler 23 is communicated with the inner cavity of the activation section 143 through a pipeline.
The steam of exhaust-heat boiler 23 is as the steam that the dangerous useless charcoal activation in-process supplyed, provides the heat for whole device maintains stable temperature and supplyes, and steam itself has the activating effect and the difficult loss of burning of the charcoal component in the dangerous useless charcoal to dangerous useless charcoal.
Referring to fig. 1, further, the tail gas treatment unit 20 further includes a quenching absorption tower 24, and an inlet of the quenching absorption tower 24 is connected to an outlet of the waste heat boiler 23.
The main function of the quenching absorption tower 24 is to rapidly cool the flue gas and simultaneously absorb the acid components in the tail gas by using alkali liquor.
The quench absorption tower 24 is directly cooled by spraying an alkali solution. Flue gas flowing through the tower 24 of the quenching absorption tower directly contacts with the sprayed alkali liquor after atomization, the mass transfer speed and the heat transfer speed are high, the sprayed alkali liquor is quickly gasified to take away a large amount of heat, and the temperature of the flue gas can be quickly reduced to about 200 ℃, so that the regeneration of dioxin-like substances is avoided, and meanwhile, the acidic components in the flue gas are neutralized.
Specifically, the flue gas temperature after passing through the exhaust-heat boiler 23 is about 500 ℃, in order to avoid the regeneration of dioxin substances in the temperature range of 250-500 ℃, the system must shorten the residence time of the flue gas in the temperature range as much as possible, so the system is provided with the rapid cooling absorption tower 24 for the flue gas, the upper part of the rapid cooling absorption tower 24 is provided with an alkali liquor atomizing nozzle, the alkali liquor atomizing nozzle is a double-layer jacket pipe, the alkali liquor flows away from an inner pipe, the compressed air flows away from an outer pipe, the alkali liquor and the compressed air are intensively mixed at a nozzle head and then are sprayed out from the nozzle, and the alkali liquor is atomized into fine particles and is contacted with the flue gas for absorption.
Referring to fig. 1, further, the tail gas treatment unit 20 further includes a bag-type dust collector 25, and an inlet of the bag-type dust collector 25 is connected to an outlet of the quenching absorption tower 24.
Referring to fig. 1, further, the tail gas treatment unit 20 further includes a desulfurizing tower 26, and an inlet of the desulfurizing tower 26 is connected to an outlet of the bag dust collector.
Referring to fig. 1, in a specific embodiment, the tail gas treatment unit 20 further includes a dioxin treatment component 28, the dioxin treatment component 28 includes an activated carbon bin 281, an outlet of the activated carbon bin 281 is communicated with a pipeline between the bag-type dust remover 25 and the quenching absorption tower 24, powdered activated carbon in the activated carbon bin 281 enters the pipeline between the bag-type dust remover 25 and the quenching absorption tower 24 and then is mixed with flue gas in the pipeline, and the activated carbon further absorbs dioxin-like substances in the flue gas. Further, the dioxin treatment component 28 further includes a disk feeder, an activated carbon conveyor fan, and a dry reactor, the activated carbon is stored in an activated carbon bin 281, the activated carbon in the activated carbon bin 281 is conveyed to the activated carbon conveyor fan by the disk feeder, the activated carbon is conveyed to the dry reactor by the activated carbon conveyor fan, an outlet of the quenching absorption tower 24 is connected with an inlet at the bottom of the dry reactor, an outlet of the dry reactor is connected with an inlet of a bag-type dust collector 25, activated carbon powder with a particle size of about 200 meshes is sprayed in the direction of the flow of the flue gas, the activated carbon powder is dispersed in the flue gas by means of the flue gas flow, the contact time of the activated carbon particles and the flue gas is prolonged in the dry reactor, and the activated carbon particles adsorbing dioxin are finally collected by the bag-type dust collector 25.
Referring to fig. 1, in a specific embodiment, two ends of a pipeline between the bag-type dust collector 25 and the quenching absorption tower 24 are thick, the middle of the pipeline is thin, an outlet of the activated carbon bin 281 is communicated with a middle part of the pipeline between the bag-type dust collector 25 and the quenching absorption tower 24, activated carbon powder in the activated carbon bin 281 can be sucked by negative pressure generated by the middle part of the pipeline between the bag-type dust collector 25 and the quenching absorption tower 24, meanwhile, because two ends of the pipeline between the bag-type dust collector 25 and the quenching absorption tower 24 are thick, the middle of the pipeline is thin, smoke in the pipeline between the bag-type dust collector 25 and the quenching absorption tower 24 can form turbulence, because the smoke and the activated carbon are fully mixed, the activated carbon can be adhered to the inner surface of a bag of the bag-type dust collector 25 after entering the bag-type dust collector 25, and dioxin-like substances are further absorbed by.
Referring to fig. 1, in a specific embodiment, the tail gas treatment unit 20 further includes a dry deacidification component, the dry deacidification component includes a disk feeder, a roots blower, a slaked lime bin and a dry reactor, lime powder is stored in the slaked lime bin, the lime powder is continuously and uniformly sprayed into the dry reactor through the disk feeder and the roots blower, an outlet of the quenching absorption tower 24 is connected with an inlet at the bottom of the dry reactor, an outlet of the dry reactor is connected with an inlet of the bag-type dust collector 25, flue gas enters from the bottom of the dry reactor and reacts with the lime powder chemically, and C0 in the flue gas can be removed2、S02、H2O, and the like.
Referring to fig. 1, a method for activating and regenerating hazardous waste carbon is provided, which comprises the following steps:
heating the dynamic regeneration furnace 14 to a preset temperature, starting the negative pressure fan 16, feeding cold air from a gas phase inlet arranged at the lower part of the carbonization section 141, sequentially passing the dangerous waste carbon powder through the carbonization section 141 of the dynamic regeneration furnace 14, the connection section 142 of the dynamic regeneration furnace 14, the activation section 143 of the dynamic regeneration furnace 14 and the first metal film bag filter 15, sequentially carbonizing and activating the dangerous waste carbon powder to form activated carbon, then discharging the activated carbon from a solid phase outlet of the first metal film bag filter 15, feeding hot tail gas from a gas phase outlet of the first metal film bag filter 15 into the flash drying body 111, feeding the hot tail gas from the gas phase inlet of the flash drying body 111 into the bottom of the flash drying body 111 in a tangential direction of the flash drying body 111 to form a rotary wind field, and feeding the hot tail gas carrying the dangerous waste carbon powder with a predetermined moisture content and particle size from the gas phase outlet of the flash drying body 111, and the tail gas passes through the cyclone dust collector 12 and the second metal film bag filter 13 in sequence, the tail gas is discharged from a gas phase outlet of the second metal film bag filter 13, and the dangerous waste carbon powder separated by the cyclone dust collector 12 and the second metal film bag filter 13 is sent to the carbonization section 141 of the dynamic regeneration furnace 14.
The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs.
The modules or units in the device of the embodiment of the invention can be combined, divided and deleted according to actual needs.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a dangerous waste carbon energy-saving activation regeneration system that can restrain dioxin and produce which characterized in that: including useless charcoal regeneration unit, tail gas processing unit, useless charcoal regeneration unit includes flash dryer, cyclone, second metal film bag filter, dynamic regeneration stove, first metal film bag filter, negative-pressure air fan, the flash dryer includes flash drying body, air inlet distributor, be equipped with the solid phase entry on the flash drying body rampart, flash drying body top is equipped with the gaseous phase export, establishes the air inlet distributor in flash drying body outside bottom cover, the air inlet distributor is the hollow ring body, be equipped with the gaseous phase entry on the outside rampart of air inlet distributor, the inboard rampart of air inlet distributor is equipped with the wind gap, is equipped with a plurality of slits on the flash drying body lateral wall, the circumference equipartition of flash drying body is followed to the slit, the export and the flash drying body inner chamber intercommunication of slit, the tangential direction of flash drying body is followed in the export of slit, the inlet of the slit is connected with the air port of the air inlet distributor, the gas phase outlet of the flash evaporation drying body is connected with the gas phase inlet of the side part of the cyclone dust collector, the gas phase outlet of the top part of the cyclone dust collector is connected with the gas phase inlet of the side part of the second metal film bag filter, the inlet of the negative pressure fan is connected with the gas phase outlet of the top part of the second metal film bag filter, the dynamic regeneration furnace is a door-shaped hollow cylinder and comprises a carbonization section, a connection section and an activation section, the solid phase outlet of the bottom part of the cyclone dust collector is connected with the solid phase inlet of the side part of the carbonization section, the solid phase outlet of the bottom part of the second metal film bag filter is connected with the solid phase inlet of the side part of the carbonization section, the gas phase inlet is arranged at the lower part of the carbonization section, the gas phase outlet of the top part of the carbonization section is connected with one end of the connection section, the gas phase outlet at the lower part of the activation section is connected with the gas phase inlet at the side part of the first metal film bag filter, the gas phase outlet at the top part of the first metal film bag filter is connected with the gas phase inlet of the air inlet distributor, the tail gas treatment unit comprises a buffer tank, a secondary combustion chamber, a waste heat boiler and a denitration part, the inlet of the buffer tank is connected with the outlet of the negative pressure fan, the secondary combustion chamber comprises an outer furnace body and an inner furnace body, the outer furnace body is hollow, the inner furnace body is a hollow cylinder with an opening at the top, the inner furnace body is coaxially sleeved in the outer furnace body, the lower end surface of the inner furnace body is contacted with the bottom surface of the outer furnace body, the upper end surface of the inner furnace body is not contacted with the top surface of the inner furnace body, the outer diameter of the inner furnace body is smaller than the inner diameter of the outer furnace body, the inner wall of the inner furnace, The bottom intercommunication in annular preheating chamber between the outer furnace body, exhaust-heat boiler's entry passes through the bottom intercommunication of pipeline and interior furnace body inner chamber, the denitration part includes urea agitator tank, circulating pump, urea solution storage tank, measuring pump, urea atomizing nozzle, the exit of urea agitator tank and the entry linkage of circulating pump, the exit of circulating pump and the entry linkage of urea solution storage tank, the exit storehouse of urea solution storage tank and the entry linkage of measuring pump, the exit of measuring pump and the liquid phase entry linkage of urea atomizing nozzle, the gaseous phase entry of urea atomizing nozzle is used for letting in highly-compressed air, urea atomizing nozzle is in order to spout into exhaust-heat boiler's furnace with the urea solution after the atomizing.
2. The system for energy-saving activation and regeneration of hazardous waste carbon capable of inhibiting generation of dioxin according to claim 1, characterized in that: flash drying machine still includes hierarchical ring, breaks up the subassembly, the flash drying body is the cavity barrel, installs hierarchical ring on the upper portion of flash drying body inner chamber, is equipped with the toper bottom surface in the bottom of flash drying body inner chamber, break up the subassembly including breaking up main shaft, driving motor, breaking up the blade, break up the lower extreme of main shaft and driving motor's output coaxial coupling, break up the vertical toper bottom surface that upwards passes the flash drying body in main shaft upper end, break up the blade and set firmly in the upper end of breaking up the main shaft.
3. The system for energy-saving activation and regeneration of hazardous waste carbon capable of inhibiting generation of dioxin according to claim 2, characterized in that: flash drying machine still includes base, compressed gas subassembly, the compressed gas subassembly includes air pump, trachea, on the base was arranged in to the flash drying body, formed confined bottom chamber between the upper surface of base and the toper bottom surface of flash drying body, driving motor sets firmly on the base, break up the vertical toper bottom surface that upwards passes base and the dry body of evaporation to dryness in main shaft upper end, it passes through the bearing and is connected with the base rotation to break up the main shaft, the export of air pump is connected with tracheal one end, tracheal other end and bottom chamber intercommunication.
4. The system for energy-saving activation and regeneration of hazardous waste carbon capable of inhibiting generation of dioxin according to claim 1, characterized in that: the secondary combustion chamber further comprises a lattice brick and a gas proportion adjusting burner, the lower part of the inner side of the outer furnace body is a columnar cavity, the upper part of the inner side of the outer furnace body is a conical cavity, a fire hole is formed in the top of the outer furnace body, the lattice brick is filled in the inner furnace body, the gas proportion adjusting burner is installed at the top of the outer furnace body, a nozzle of the gas proportion adjusting burner is connected with the fire hole of the outer furnace body, a labyrinth brick joint is formed between the lattice brick and the lattice brick, an explosion-proof hole is further formed in the top of the outer furnace body, and an explosion-proof cover covers the explosion-proof hole.
5. The system for energy-saving activation and regeneration of hazardous waste carbon capable of inhibiting generation of dioxin according to claim 1, characterized in that: the flash dryer is a rotary flash dryer, and the first metal film bag filter and the second metal film bag filter are both intermetallic compound asymmetric dust collectors.
6. The system for energy-saving activation and regeneration of hazardous waste carbon capable of inhibiting generation of dioxin according to claim 1, characterized in that: the waste carbon regeneration unit further comprises a tower type cooling bed, and an inlet of the tower type cooling bed is connected with a solid phase outlet at the bottom of the first metal film bag filter.
7. The system for energy-saving activation and regeneration of hazardous waste carbon capable of inhibiting generation of dioxin according to claim 1, characterized in that: and a steam outlet of the waste heat boiler is communicated with an inner cavity of the activation section through a pipeline.
8. The system for energy-saving activation and regeneration of hazardous waste carbon capable of inhibiting generation of dioxin according to claim 1, characterized in that: the tail gas treatment unit also comprises a quenching absorption tower, and an inlet of the quenching absorption tower is connected with an outlet of the waste heat boiler.
9. The system for energy-saving activation and regeneration of hazardous waste carbon capable of inhibiting generation of dioxin according to claim 8, characterized in that: the tail gas treatment unit also comprises a bag-type dust remover, and an inlet of the bag-type dust remover is connected with an outlet of the quenching absorption tower.
10. The system for energy-saving activation and regeneration of hazardous waste carbon capable of inhibiting generation of dioxin according to claim 9, characterized in that: the tail gas treatment unit also comprises a desulfurizing tower, and an inlet of the desulfurizing tower is connected with an outlet of the bag dust collector.
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| CN112377930A (en) * | 2020-10-16 | 2021-02-19 | 雷波凯瑞磷化工有限责任公司 | Method and equipment for reducing nitrogen oxide emission by yellow phosphorus tail gas combustion |
| CN112393229A (en) * | 2020-10-16 | 2021-02-23 | 雷波凯瑞磷化工有限责任公司 | Boiler capable of reducing nitrogen oxide emission during combustion of yellow phosphorus tail gas |
| CN114917888A (en) * | 2022-05-12 | 2022-08-19 | 江苏清淼环保有限公司 | Vertical regenerative furnace with temperature adjusting effect and adjusting method |
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