CN109708120A - Dangerous waste incineration and smoke processing system and method - Google Patents
Dangerous waste incineration and smoke processing system and method Download PDFInfo
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- CN109708120A CN109708120A CN201910053877.XA CN201910053877A CN109708120A CN 109708120 A CN109708120 A CN 109708120A CN 201910053877 A CN201910053877 A CN 201910053877A CN 109708120 A CN109708120 A CN 109708120A
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- activated coke
- flue gas
- smoke
- tower
- desulphurization denitration
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The invention discloses a kind of dangerous waste incineration and smoke processing system and methods, including sequentially connected rotary kiln, dual firing chamber, waste heat boiler, chilling tower, activated coke combined desulfurization and denitration device, bag filter and blowdown stack；Waste heat boiler is equipped with high-temperature flue gas import end and low-temperature flue gas outlet end, and high-temperature flue gas import end is connected to the smoke outlet of dual firing chamber, and low-temperature flue gas outlet end is connected to the smoke inlet and activated coke combined desulfurization and denitration device of chilling tower；It is equipped with material pit at the feed inlet of rotary kiln, driving system is equipped with above material pit, driving system is grabbed for hanging the waste material in material pit into rotary kiln.Simplify the process flow of hazardous waste more, without using raw materials such as calcium hydroxide, liquid alkaline, urea, reduce resource consumption, do not generate brine waste, reduce treatment pressure of sewage and cost, meets resources circulation use, the requirement of cascaded utilization of energy.
Description
Technical field
The invention belongs to waste incineration and filed of flue gas purification, more particularly, to a kind of dangerous waste incineration and flue gas
Processing system and method.
Background technique
With the exacerbation that earth environment pollutes, country is increasingly stringenter the supervision of environmental protection, makes the row of domestic incineration tail gas
Put standard towards minimum discharge trend development.In recent years, as hazardous waste handles putting more effort for disposition, hazardous waste
Burning amount increases severely.Current semidry method or dry method adds being applied in combination for wet desulphurization and SNCR/SCR denitration technology, Neng Goushi
Existing minimum discharge, but the flue gas " Mao Bai " discharged after wet process depickling, and a large amount of waste water are generated, SNCR/SCR denitration technology needs
Consume the raw materials such as urea and ammonium hydroxide, and equipment caused to corrode, process flow there are the shortcomings that it is as follows:
1) dry method adds wet desulphurization or semi-dry desulphurization need to use a variety of desulfurizing agents such as a large amount of calcium hydroxide, liquid alkaline, raw
It produces at high cost；And wet desulphurization can generate a large amount of saline sewage, to saline sewage, there are no good processing methods at present, dirty
Water process difficulty is big, further increases production cost；
2) denitration technologies such as SNCR/SCR more mature at present are needed using raw materials such as a large amount of urea or ammonium hydroxide, and
Reaction condition is harsher, control it is bad will cause the escaping of ammonia, secondary pollution is formed, along with making for urea liquid or ammonium hydroxide
With will increase pipeline blockage, equipment corrosion risk；
3) process flow is longer, increases smoke flow resistance, the control of index is seriously lagged.
Therefore, it is necessary to develop a kind of dangerous waste incineration and smoke processing system and methods, are simplifying the same of process flow
When, it avoids because generating exhaust gas and waste water, and secondary pollution is formed, and avoid equipment corrosion, reduce the processing of hazardous waste
Cost, and can be realized the recycling of the energy, energy conservation and environmental protection.
Summary of the invention
The object of the present invention is to provide a kind of dangerous waste incineration and smoke processing system and methods, are not using niter
Under the premise of the raw materials such as ash, liquid alkaline, urea, simplifies the process flow of hazardous waste more, reduce resource consumption, do not generate and contain
Salt waste water reduces treatment pressure of sewage and cost, meets resources circulation use, the requirement of cascaded utilization of energy.
To achieve the goals above, the first aspect of the present invention provides a kind of dangerous waste incineration and smoke processing system,
Including sequentially connected rotary kiln, dual firing chamber, waste heat boiler, chilling tower, activated coke combined desulfurization and denitration device, bag filter
And blowdown stack；
The waste heat boiler is equipped with high-temperature flue gas import end and low-temperature flue gas outlet end, and the high-temperature flue gas import end connects
Be connected to the smoke outlet of the dual firing chamber, the low-temperature flue gas outlet end be connected to the chilling tower smoke inlet and the activated coke
Combined desulfurization and denitration device；
It is equipped with material pit at the feed inlet of the rotary kiln, is equipped with driving system, the vehicle-driving above the material pit
System is grabbed for hanging the waste material in the material pit into the rotary kiln.
Preferably, the activated coke combined desulfurization and denitration device includes desulphurization denitration tower, active coke regeneration device and by-product
Object collection device, the desulphurization denitration tower is equipped with smoke inlet, exhanst gas outlet and activated coke entrance, activated coke exports, described
Smoke inlet is connected to the smoke outlet of the chilling tower, and the exhanst gas outlet is connected to the entrance of the bag filter；
The active coke regeneration device includes heating cabinet and the activated coke being set to inside the heating cabinet regenerates storehouse, described
Heating cabinet is equipped with hot fume import and cold flue gas exports, and activated coke regeneration storehouse is equipped with exhaust outlet, feed inlet and discharging
Mouthful, the hot fume import is connected to the smoke outlet of the waste heat boiler, and the cold flue gas outlet is connected to two combustion
Room, the activated coke outlet of the desulphurization denitration tower are connected to the feed inlet in activated coke regeneration storehouse, and the activated coke regenerates storehouse
Discharge port be connected to the activated coke entrance of the desulphurization denitration tower, the exhaust outlet is connected to the byproduct collection device.
Preferably, in the activated coke combined desulfurization and denitration device include at least two desulphurization denitration towers, described at least two
A desulphurization denitration tower is parallel with one another.
Preferably, the activated coke combined desulfurization and denitration device further includes ammonia spirit injection apparatus, the ammonia spirit
Injection apparatus is connected to the desulphurization denitration tower.
Preferably, the activated coke inlet of the desulphurization denitration tower is equipped with activated coke adding set, the activated coke entrance
It is connect with the activated coke adding set by carrier bar, the discharge port and the activated coke adding set in activated coke regeneration storehouse
It is connected by carrier bar.
Preferably, stop valve is equipped at the smoke inlet of the desulphurization denitration tower, the activated coke of the desulphurization denitration tower goes out
Pass through conveyer between mouth and the feed inlet in activated coke regeneration storehouse to connect.
Preferably, it is equipped with flue gas on-line continuous monitoring device between the bag filter and the blowdown stack, is used for
Monitor smoke components.
The second aspect of the present invention provides a kind of danger carried out using above-mentioned dangerous waste incineration and smoke processing system
Incineration of waste and flue gas processing method, described method includes following steps:
1) hazardous waste in material pit is hung to grab using driving system and is burned into rotary kiln, hazardous waste is returning
Combustion decomposition generates harmful smoke and waste residue containing dioxin in rotary kiln, and waste residue is discharged by rotary kiln bottom, harmful smoke into
Enter dual firing chamber；
2) high-temperature flue gas is emitted into waste heat boiler changes later by harmful smoke through pyrolytic in dual firing chamber
Heat, obtained low-temperature flue gas are discharged into chilling tower and further cool down；
3) low-temperature flue gas after cooling enters the progress desulphurization denitration processing of activated coke combined desulfurization and denitration device；
4) through desulphurization denitration, treated that flue gas enters purifying and dedusting in bag filter；
5) it after purifying and dedusting to discharge standard, is discharged through blowdown stack.
Preferably, desulphurization denitration described in step 3) is handled, and is included the following steps:
3.1) activated coke is added into desulphurization denitration tower by activated coke entrance, is later discharged into flue gas by smoke inlet
In desulphurization denitration tower, desulphurization denitration is carried out using the adsorption function of activated coke, the flue gas after the completion of adsorbing is entered by exhanst gas outlet
To next processing step；
3.2) it is exported and is discharged by activated coke after activated coke adsorption saturation, enter activated coke regeneration storehouse, waste heat pot through feed inlet
The flue gas of the low-temperature flue gas outlet end of furnace enters heating cabinet by hot fume import, adds indirectly to the activated coke in activated coke regeneration storehouse
Heat is allowed to regenerate through thermal desorption；
3.3) gas generated in thermal desorption regenerative process enters byproduct collection device through exhaust outlet, and it is former to be used as chemical industry
Material；
3.4) after completing heating, the flue gas in heating cabinet is exported by cold flue gas to be discharged, and is returned in dual firing chamber, is further decomposed
Dioxin；
3.5) activated coke after thermal desorption regenerates is discharged by discharge port, returns to weight in desulphurization denitration tower through activated coke entrance
It is multiple to utilize.
Preferably, the heating temperature in the dual firing chamber is at least 1100 DEG C, the heating in the active coke regeneration device
Temperature is 380 DEG C -420 DEG C.
The beneficial effects of the present invention are:
1, desulphurization denitration is carried out using activated coke combined desulfurization and denitration device in this processing system, without in addition setting desulfurization
Equipment and denitration device simplify process flow more；Using active coke desulphurizing denitration, calcium hydroxide, liquid alkaline, urea etc. are not needed
Raw material reduces resource consumption, does not generate brine waste, reduces treatment pressure of sewage and cost；Waste heat boiler utilizes dual firing chamber
High-temperature flue gas as production and life needed for heat source, and using heat exchange after low-temperature flue gas be activated coke combined desulfurization and denitration
Device heating, is not required to heating device is arranged in the processing system, and meets that resources circulation uses, cascaded utilization of energy is wanted
It asks.
2, the activated coke in desulphurization denitration tower, which can enter in active coke regeneration device, carries out thermal desorption regeneration and is recycled,
Processing cost is reduced, while the high-concentration sulfur-containing body containing niter air adsorbed in activated coke can be collected during thermal desorption
As industrial chemicals, resource is made full use of；It can return in dual firing chamber and be heated for the flue gas that active coke regeneration device heats,
Dioxin is further decomposed, prevents flue gas from getting into the air and pollutes environment.
3, at least two desulphurization denitration towers are arranged in parallel in activated coke combined desulfurization and denitration device, a part uses another
Part switches to stand-by still after wherein using tower adsorption saturation and continues to adsorb as spare, and by adsorption saturation
Activated coke, which is expelled in active coke regeneration device, carries out regeneration treatment, is back in desulphurization denitration tower after being disposed, multiple de-
Sulphur denitrating tower is recycled, and guarantees the continuity for the treatment of process.
4, ammonia spirit injection apparatus is set in desulphurization denitration tower, increases by one section of spray ammonia reaction zone, by activated coke and SCR phase
In conjunction with activated coke is mainly physical adsorption and chemical adsorption to the removing of nitrogen oxides, in addition containing a large amount of in activated coke hole
Functional group, these functional groups can be catalyzed well ammonia and be reacted with nitrogen oxides, and the combination of two kinds of technique, effect is more excellent,
Further decrease discharged nitrous oxides.
Other features and advantages of the present invention will then part of the detailed description can be specified.
Detailed description of the invention
Exemplary embodiment of the invention is described in more detail in conjunction with the accompanying drawings, it is of the invention above-mentioned and its
Its purpose, feature and advantage will be apparent, wherein in exemplary embodiment of the invention, identical reference label
Typically represent same parts.
Fig. 1 shows the schematic diagram of dangerous waste incineration and smoke processing system according to an embodiment of the invention.
Fig. 2 shows the schematic diagrames of activated coke combined desulfurization and denitration device according to an embodiment of the invention.
Description of symbols
1, material pit；2, driving system；3, rotary kiln；4, dual firing chamber；5, waste heat boiler；6, chilling tower；7, activated coke joins
Close desulfuring and denitrifying apparatus；8, bag filter；9, blowdown stack；10, desulphurization denitration tower；11, activated coke adding set；12, living
Property coke regenerating unit；13, byproduct collection device；14, valve；15, smoke inlet；16, exhanst gas outlet.
Specific embodiment
The preferred embodiment of the present invention is described in more detail below.Although the following describe preferred implementations of the invention
Mode, however, it is to be appreciated that may be realized in various forms the present invention without that should be limited by the embodiments set forth herein.Phase
Instead, these embodiments are provided so that the present invention is more thorough and complete, and can be by the scope of the present invention completely
It is communicated to those skilled in the art.
Dangerous waste incineration and smoke processing system according to the present invention, including it is sequentially connected rotary kiln, dual firing chamber, remaining
Heat boiler, chilling tower, activated coke combined desulfurization and denitration device, bag filter and blowdown stack；
Waste heat boiler is equipped with high-temperature flue gas import end and low-temperature flue gas outlet end, and high-temperature flue gas import end is connected to two combustions
The smoke outlet of room, low-temperature flue gas outlet end are connected to the smoke inlet and activated coke combined desulfurization and denitration device of chilling tower；
It is equipped with material pit at the feed inlet of rotary kiln, driving system is equipped with above material pit, driving system is used for storing
Waste material in hole, which is hung, grabs into rotary kiln.
In waste heat boiler of the invention, in addition to above-mentioned high-temperature flue gas import end and low-temperature flue gas outlet end, it is additionally provided with water
Input end and steam outlet end, for exchanging heat with high-temperature flue gas, to realize the utilization of waste heat.
Specifically, desulphurization denitration is carried out using activated coke combined desulfurization and denitration device in this processing system, without in addition setting
Desulphurization plant and denitration device are set, simplifies process flow more；Using active coke desulphurizing denitration, do not need calcium hydroxide, liquid alkaline,
The raw materials such as urea reduce resource consumption, do not generate brine waste, reduce treatment pressure of sewage and cost；Waste heat boiler utilizes
Heat source of the high-temperature flue gas of dual firing chamber as production and needed for living, and be that activated coke joint is de- using the low-temperature flue gas after heat exchange
The heating of sulphur denitrification apparatus, is not required to that heating device is arranged in the processing system, and meets resources circulation use, cascaded utilization of energy
Requirement.
Preferably, activated coke combined desulfurization and denitration device includes desulphurization denitration tower, active coke regeneration device and pair
Collection of products device, desulphurization denitration tower is equipped with smoke inlet, exhanst gas outlet and activated coke entrance, activated coke exports, and flue gas enters
Mouth is connected to the smoke outlet of chilling tower, and exhanst gas outlet is connected to the entrance of bag filter；
Active coke regeneration device includes heating cabinet and the activated coke being set to inside heating cabinet regeneration storehouse, and heating cabinet is equipped with
Hot fume import and cold flue gas outlet, activated coke regenerate storehouse and are equipped with exhaust outlet, inlet port and outlet port, hot fume import connection
In the low-temperature flue gas outlet end of waste heat boiler, cold flue gas outlet is connected to dual firing chamber, and the activated coke of desulphurization denitration tower exports connection
The discharge port of feed inlet in activated coke regeneration storehouse, activated coke regeneration storehouse is connected to the activated coke entrance of desulphurization denitration tower, exhaust
Mouth is connected to byproduct collection device.
Specifically, the activated coke in desulphurization denitration tower, which can enter in active coke regeneration device, carries out thermal desorption regeneration and recycles
It uses, reduces processing cost, while the high-concentration sulfur-containing body containing niter air adsorbed in activated coke can be received during thermal desorption
Collect as industrial chemicals, resource has been made full use of；For active coke regeneration device heating flue gas can return in dual firing chamber into
Row heating, further decomposes dioxin, prevents flue gas from getting into the air and pollute environment.
Preferably, in activated coke combined desulfurization and denitration device include at least two desulphurization denitration towers, at least two
Desulphurization denitration tower is parallel with one another.
Specifically, at least two desulphurization denitration towers are arranged in parallel in activated coke combined desulfurization and denitration device, a part makes
Another part is used to switch to stand-by still after wherein using tower adsorption saturation and continue to adsorb as spare, and will absorption
The activated coke of saturation, which is expelled in active coke regeneration device, carries out regeneration treatment, is back in desulphurization denitration tower after being disposed,
Multiple desulphurization denitration towers are recycled, and guarantee the continuity for the treatment of process.
Preferably, activated coke combined desulfurization and denitration device further includes ammonia spirit injection apparatus, ammonia spirit spray
Injection device is connected to desulphurization denitration tower.
Specifically, ammonia spirit injection apparatus is set in desulphurization denitration tower, increases by one section of spray ammonia reaction zone, by activated coke and
SCR is combined, and activated coke is mainly physical adsorption and chemical adsorption to the removing of nitrogen oxides, is in addition contained in activated coke hole
A large amount of functional group, these functional groups can be catalyzed well ammonia and be reacted with nitrogen oxides, and the combination of two kinds of technique, effect is more
It is excellent, further decrease discharged nitrous oxides.
Preferably, the activated coke inlet of desulphurization denitration tower be equipped with activated coke adding set, activated coke entrance with
Activated coke adding set is connected by carrier bar, and the discharge port in activated coke regeneration storehouse is connect with activated coke adding set by carrier bar.
Preferably, stop valve is equipped at the smoke inlet of desulphurization denitration tower, the activated coke of desulphurization denitration tower exports
It is connect between the feed inlet in activated coke regeneration storehouse by conveyer.
Preferably, flue gas on-line continuous monitoring device is equipped between bag filter and blowdown stack, for supervising
Survey smoke components, feedback control system for desulfuration and denitration, to guarantee flue gas qualified discharge.
The present invention also provides a kind of dangerous waste incinerations carried out using above-mentioned dangerous waste incineration and smoke processing system
And flue gas processing method, this method comprises the following steps:
1) hazardous waste in material pit is hung to grab using driving system and is burned into rotary kiln, hazardous waste is returning
Harmful smoke and waste residue containing dioxin are generated through pyrolysis in rotary kiln, waste residue is discharged by rotary kiln bottom, and harmful smoke enters
Dual firing chamber；
2) high-temperature flue gas is emitted into waste heat boiler changes later by harmful smoke through pyrolytic in dual firing chamber
Heat, obtained low-temperature flue gas are discharged into chilling tower and further cool down；
3) low-temperature flue gas after cooling enters the progress desulphurization denitration processing of activated coke combined desulfurization and denitration device；
4) through desulphurization denitration, treated that flue gas enters purifying and dedusting in bag filter；
5) it after purifying and dedusting to discharge standard, is discharged through blowdown stack.
Preferably, the desulphurization denitration processing in step 3), includes the following steps:
3.1) activated coke is added into desulphurization denitration tower by activated coke entrance, is later discharged into flue gas by smoke inlet
In desulphurization denitration tower, desulphurization denitration is carried out using the adsorption function of activated coke, the flue gas after the completion of adsorbing is entered by exhanst gas outlet
To next processing step；
3.2) it is exported and is discharged by activated coke after activated coke adsorption saturation, enter activated coke regeneration storehouse, waste heat pot through feed inlet
The flue gas of the low-temperature flue gas outlet end of furnace enters heating cabinet by hot fume import, adds indirectly to the activated coke in activated coke regeneration storehouse
Heat is allowed to regenerate through thermal desorption；
3.3) gas generated in thermal desorption regenerative process enters byproduct collection device through exhaust outlet, and it is former to be used as chemical industry
Material；
3.4) after completing heating, the flue gas in heating cabinet is exported by cold flue gas to be discharged, and is returned in dual firing chamber and is carried out at heating
Reason, further decomposes dioxin；
3.5) activated coke after thermal desorption regenerates is discharged by discharge port, returns to weight in desulphurization denitration tower through activated coke entrance
It is multiple to utilize.
Preferably, the heating temperature in dual firing chamber is at least 1100 DEG C, the heating temperature in active coke regeneration device
Degree is 380 DEG C -420 DEG C.
Embodiment 1
Fig. 1 shows the schematic diagram of dangerous waste incineration and smoke processing system according to the present embodiment；
Fig. 2 shows the schematic diagrames according to the activated coke combined desulfurization and denitration device of the present embodiment.
As shown in Figure 1 to Figure 2, the dangerous waste incineration and smoke processing system, including sequentially connected rotary kiln 3, two
Fire room 4, waste heat boiler 5, chilling tower 6, activated coke combined desulfurization and denitration device 7, bag filter 8 and blowdown stack 9；Rotary kiln
It is equipped with material pit 1 at 3 feed inlet, driving system 2 is equipped with above material pit 1, driving system 2 is used for will be useless in material pit 1
Material, which is hung, grabs into rotary kiln 3；Waste heat boiler 5 is equipped with high-temperature flue gas import end and low-temperature flue gas outlet end；Wherein, activated coke joins
Closing desulfuring and denitrifying apparatus 7 includes two desulphurization denitration towers 10, active coke regeneration device 12 and byproduct collection device 13, and two de-
Sulphur denitrating tower 10 is parallel with one another, and each desulphurization denitration tower 10 is equipped with smoke inlet 15, exhanst gas outlet 16 and activated coke entrance, work
Property coke outlet, stop valve is equipped at smoke inlet 15, smoke inlet 15 is connected to the smoke outlet of chilling tower 6, and exhanst gas outlet 16 connects
It is connected to the entrance of bag filter 8；Active coke regeneration device 12 include heating cabinet and the activated coke that is set to inside heating cabinet again
Raw storehouse, heating cabinet is equipped with hot fume import and cold flue gas exports, and activated coke regenerates storehouse and is equipped with exhaust outlet, feed inlet and discharging
Mouthful, hot fume import is connected to the low-temperature flue gas outlet end of waste heat boiler 5, and cold flue gas outlet is connected to dual firing chamber 4, desulphurization denitration
The activated coke outlet of tower 10 is connected to the feed inlet that activated coke regenerates storehouse by conveyer, and activated coke regenerates the discharge port connection in storehouse
In activated coke adding set 11, activated coke adding set 11 is connected to the activated coke entrance on desulphurization denitration tower 10 by pipeline,
Pipeline is equipped with valve 14, and exhaust outlet is connected to byproduct collection device 13, and the gas being collected into is used as industrial chemicals；Waste heat pot
Furnace 5 be used for UTILIZATION OF VESIDUAL HEAT IN, between bag filter 8 and blowdown stack 9 be equipped with continuous flue gas monitoring device, for monitor flue gas at
Point.
Hazardous waste in material pit 1 is hung to grab into rotary kiln 3 using driving system 2 and is burned, hazardous waste exists
Harmful smoke and waste residue containing dioxin are generated through pyrolysis in rotary kiln 3, waste residue is discharged by 3 bottom of rotary kiln, harmful smoke
Into dual firing chamber 4, in dual firing chamber 4 after pyrolytic, high-temperature flue gas is emitted into waste heat boiler 5 and is exchanged heat, is obtained
To low-temperature flue gas be discharged into chilling tower 6 and further cool down；Low-temperature flue gas after cooling enters desulphurization denitration tower 10, utilizes desulfurization
Active coke desulphurizing denitration in denitrating tower 10；Two desulphurization denitration towers 10, the using and the reserved are cut after one of tower adsorption saturation
It shifts to another tower to continue, while the activated coke of adsorption saturation being exported from the activated coke of desulphurization denitration tower 10 and is discharged,
Active coke regeneration device 12 is transported to by conveyer and carries out thermal desorption regeneration treatment, the heat source in activated coke regenerative process are as follows: will
Activated coke is regenerated in storehouse and has been inhaled by (about 550 DEG C) introducing heating cabinets of partial fume of the low-temperature flue gas outlet end of waste heat boiler 5
The activated coke indirect heating of attached saturation is to carrying out thermal desorption between 380 DEG C -420 DEG C；Low-temperature flue gas after exchanging heat in heating cabinet
It is returned in dual firing chamber 4 from hot fume outlet, it is using 1100 DEG C or more of high temperature of dual firing chamber 4, the dioxin in flue gas is complete
It decomposes, avoids pollution environment；Activated coke after being disposed loads sulphur denitrating tower back off by activated coke adding set 11 again
In 10, two desulphurization denitration towers 10 are recycled；Desulphurization denitration tower 10 is arranged before bag filter 8, can remove some larger
The flue dust of particle, then after bag filter 8 filters dust, can directly be discharged by blowdown stack 9, exhaust temperature is
160 DEG C -170 DEG C, avoid " Mao Baiyan "；Activated coke in activated coke combined desulfurization and denitration device 7 can be recycled, still
The treatment effect of flue gas is declined after being recycled for multiple times, needs to re-replace activated coke, with specific reference to practical execution.
Embodiment 2
Fig. 1 shows the schematic diagram of dangerous waste incineration and smoke processing system according to the present embodiment；
Fig. 2 shows the schematic diagrames according to the activated coke combined desulfurization and denitration device of the present embodiment.
As shown in Figure 1 to Figure 2, the dangerous waste incineration and smoke processing system, including sequentially connected rotary kiln 3, two
Fire room 4, waste heat boiler 5, chilling tower 6, activated coke combined desulfurization and denitration device 7, bag filter 8 and blowdown stack 9；Rotary kiln
It is equipped with material pit 1 at 3 feed inlet, driving system 2 is equipped with above material pit 1, driving system 2 is used for will be useless in material pit 1
Material, which is hung, grabs into rotary kiln 3；Waste heat boiler 5 is equipped with high-temperature flue gas import end and low-temperature flue gas outlet end；Wherein, activated coke joins
Closing desulfuring and denitrifying apparatus 7 includes two desulphurization denitration towers 10, ammonia spirit injection apparatus, active coke regeneration device 11 and by-product
Collection device 12, two desulphurization denitration towers 10 are parallel with one another, and each desulphurization denitration tower 10 is equipped with smoke inlet 15, exhanst gas outlet
16 and activated coke entrance, activated coke outlet, stop valve is equipped at smoke inlet 15, smoke inlet 15 is connected to the row of chilling tower 6
Mouth, exhanst gas outlet 16 are connected to the entrance of bag filter 8, and ammonia spirit injection apparatus is connected to desulphurization denitration tower 10；It is living
Property coke regenerating unit 12 include heating cabinet and the activated coke being set to inside heating cabinet regeneration storehouse, heating cabinet be equipped with hot fume into
Mouth and cold flue gas outlet, activated coke regenerate storehouse and are equipped with exhaust outlet, inlet port and outlet port, and hot fume import is connected to waste heat pot
The low-temperature flue gas outlet end of furnace 5, cold flue gas outlet are connected to dual firing chamber 4, and the activated coke outlet of desulphurization denitration tower 10 passes through conveying
Machine is connected to the feed inlet in activated coke regeneration storehouse, and the discharge port in activated coke regeneration storehouse is connected to activated coke adding set 11, activity
Burnt adding set 11 is connected to the activated coke entrance on desulphurization denitration tower 10 by pipeline, and pipeline is equipped with valve 14, exhaust outlet
It is connected to byproduct collection device 13, the gas being collected into is used as industrial chemicals；Waste heat boiler 5 is used for UTILIZATION OF VESIDUAL HEAT IN, and cloth bag removes
Continuous flue gas monitoring device is equipped between dirt device 8 and blowdown stack 9, for monitoring smoke components.
Hazardous waste in material pit 1 is hung to grab into rotary kiln 3 using driving system 2 and is burned, hazardous waste exists
Harmful smoke and waste residue containing dioxin are generated through pyrolysis in rotary kiln 3, waste residue is discharged by 3 bottom of rotary kiln, harmful smoke
Into dual firing chamber 4, in dual firing chamber 4 after pyrolytic, high-temperature flue gas is emitted into waste heat boiler 5 and is exchanged heat, is obtained
To low-temperature flue gas be discharged into chilling tower 6 and further cool down；Low-temperature flue gas after cooling enters desulphurization denitration tower 10, utilizes desulfurization
Active coke desulphurizing denitration in denitrating tower 10；Two desulphurization denitration towers 10, the using and the reserved are cut after one of tower adsorption saturation
It shifts to another tower to continue, while the activated coke of adsorption saturation being exported from the activated coke of desulphurization denitration tower 10 and is discharged,
Active coke regeneration device 12 is transported to by conveyer and carries out thermal desorption regeneration treatment, the heat source in activated coke regenerative process are as follows: will
Activated coke is regenerated in storehouse and has been inhaled by (about 550 DEG C) introducing heating cabinets of partial fume of the low-temperature flue gas outlet end of waste heat boiler 5
The activated coke indirect heating of attached saturation to being desorbed between 380 DEG C -420 DEG C, the low-temperature flue gas after exchanging heat in heating cabinet from
Cold flue gas outlet returns in dual firing chamber 4, and using 1100 DEG C or more of high temperature of dual firing chamber 4, the dioxin in flue gas is divided completely
Solution, avoids pollution environment；Using activated coke physical absorption and chemisorption function nitrogen oxides is removed while,
Ammonia is sprayed into the flue gas of desulphurization denitration tower using ammonia spirit injection apparatus, utilizes a large amount of function contained in activated coke hole
Group, catalysis ammonia are reacted with nitrogen oxides, and the combination of two kinds of technique further realizes nitrogen oxides minimum discharge；It has handled
Activated coke after finishing is loaded in sulphur denitrating tower 10 back off again by activated coke adding set 11, and two desulphurization denitration towers 10 recycle
It uses；Desulphurization denitration tower 10 is arranged before bag filter 8, can remove the flue dust of some larger particles, then through bag filter 8
It after filtering dust, can directly be discharged by blowdown stack 9, exhaust temperature is 160 DEG C -170 DEG C, avoids " Mao Baiyan "；
Activated coke used in activated coke combined desulfurization and denitration device 7 can be recycled, but to flue gas after being recycled for multiple times
Treatment effect decline, needs to re-replace activated coke, with specific reference to practical execution.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.
Claims (10)
1. a kind of dangerous waste incineration and smoke processing system, which is characterized in that including sequentially connected rotary kiln, dual firing chamber,
Waste heat boiler, chilling tower, activated coke combined desulfurization and denitration device, bag filter and blowdown stack；
The waste heat boiler is equipped with high-temperature flue gas import end and low-temperature flue gas outlet end, and the high-temperature flue gas import end is connected to
The smoke outlet of the dual firing chamber, the low-temperature flue gas outlet end are connected to the smoke inlet and activated coke joint of the chilling tower
Desulfuring and denitrifying apparatus；
It is equipped with material pit at the feed inlet of the rotary kiln, driving system is equipped with above the material pit, the driving system is used
It grabs in hanging the waste material in the material pit into the rotary kiln.
2. dangerous waste incineration according to claim 1 and smoke processing system, which is characterized in that the activated coke joint
Desulfuring and denitrifying apparatus includes desulphurization denitration tower, active coke regeneration device and byproduct collection device, is set on the desulphurization denitration tower
There are smoke inlet, exhanst gas outlet and activated coke entrance, activated coke outlet, the smoke inlet is connected to the smoke evacuation of the chilling tower
Mouthful, the exhanst gas outlet is connected to the entrance of the bag filter；
The active coke regeneration device includes heating cabinet and the activated coke being set to inside heating cabinet regeneration storehouse, the heating
Storehouse is equipped with hot fume import and cold flue gas exports, and activated coke regeneration storehouse is equipped with exhaust outlet, inlet port and outlet port, institute
The smoke outlet that hot fume import is connected to the waste heat boiler is stated, the cold flue gas outlet is connected to the dual firing chamber, institute
The activated coke outlet for stating desulphurization denitration tower is connected to the feed inlet in activated coke regeneration storehouse, the discharging in activated coke regeneration storehouse
Mouth is connected to the activated coke entrance of the desulphurization denitration tower, and the exhaust outlet is connected to the byproduct collection device.
3. dangerous waste incineration according to claim 2 and smoke processing system, which is characterized in that the activated coke joint
It include at least two desulphurization denitration towers in desulfuring and denitrifying apparatus, at least two desulphurization denitrations tower is parallel with one another.
4. dangerous waste incineration according to claim 2 and smoke processing system, which is characterized in that the activated coke joint
Desulfuring and denitrifying apparatus further includes ammonia spirit injection apparatus, and the ammonia spirit injection apparatus is connected to the desulphurization denitration tower.
5. dangerous waste incineration according to claim 2 and smoke processing system, which is characterized in that the desulphurization denitration tower
Activated coke inlet be equipped with activated coke adding set, it is defeated that the activated coke entrance and the activated coke adding set pass through carrier bar
Machine is sent to connect, the discharge port in activated coke regeneration storehouse is connect with the activated coke adding set by chain scraper conveyor.
6. dangerous waste incineration according to claim 5 and smoke processing system, which is characterized in that the desulphurization denitration tower
Smoke inlet at be equipped with stop valve, the desulphurization denitration tower activated coke outlet with the activated coke regeneration storehouse feed inlet it
Between pass through conveyer connect.
7. dangerous waste incineration according to claim 1 and smoke processing system, which is characterized in that the bag filter
Flue gas on-line continuous monitoring device is equipped between the blowdown stack, for monitoring smoke components.
8. a kind of danger carried out using the dangerous waste incineration of any of claims 1-7 and smoke processing system is useless
Object burns and flue gas processing method, which is characterized in that described method includes following steps:
1) hazardous waste in material pit is hung to grab using driving system and is burned into rotary kiln, hazardous waste is in rotary kiln
Middle to generate harmful smoke and waste residue containing dioxin through combustion decomposition, waste residue is discharged by rotary kiln bottom, and harmful smoke enters
Dual firing chamber；
2) high-temperature flue gas is emitted into waste heat boiler exchanges heat later by harmful smoke through pyrolytic in dual firing chamber, obtains
To low-temperature flue gas be discharged into chilling tower and further cool down；
3) low-temperature flue gas after cooling enters the progress desulphurization denitration processing of activated coke combined desulfurization and denitration device；
4) through desulphurization denitration, treated that flue gas enters purifying and dedusting in bag filter；
5) it after purifying and dedusting to discharge standard, is discharged through blowdown stack.
9. dangerous waste incineration according to claim 8 and flue gas processing method, which is characterized in that described in step 3)
Desulphurization denitration processing, includes the following steps:
3.1) activated coke is added into desulphurization denitration tower by activated coke entrance, flue gas is discharged into desulfurization by smoke inlet later
In denitrating tower, desulphurization denitration is carried out using the adsorption function of activated coke, the flue gas after the completion of adsorbing is entered down by exhanst gas outlet
One processing step；
3.2) it is exported and is discharged by activated coke after activated coke adsorption saturation, enter activated coke regeneration storehouse, waste heat boiler cigarette through feed inlet
The flue gas of gas outlet end enters heating cabinet by hot fume import, indirectly to activated coke regeneration storehouse in activated coke heat, be allowed to through
Thermal desorption regeneration；
3.3) gas generated in thermal desorption regenerative process enters byproduct collection device through exhaust outlet, is used as industrial chemicals；
3.4) after completing heating, the flue gas in heating cabinet is exported by cold flue gas to be discharged, and is returned in dual firing chamber, is further decomposed two and is disliked
English；
3.5) activated coke after thermal desorption regenerates is discharged by discharge port, is returned to through activated coke entrance and is repeated benefit in desulphurization denitration tower
With.
10. dangerous waste incineration and flue gas processing method according to claim 8 or claim 9, which is characterized in that the dual firing chamber
In heating temperature be at least 1100 DEG C, the heating temperature in the active coke regeneration device be 380 DEG C -420 DEG C.
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