CN108201778A - A kind of limekiln combined denitration system - Google Patents
A kind of limekiln combined denitration system Download PDFInfo
- Publication number
- CN108201778A CN108201778A CN201810189031.4A CN201810189031A CN108201778A CN 108201778 A CN108201778 A CN 108201778A CN 201810189031 A CN201810189031 A CN 201810189031A CN 108201778 A CN108201778 A CN 108201778A
- Authority
- CN
- China
- Prior art keywords
- spray gun
- reducing agent
- agent
- denitration
- denitrfying agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
- B01D53/83—Solid phase processes with moving reactants
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/202—Hydrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/204—Carbon monoxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/208—Hydrocarbons
-
- 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
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Dispersion Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to a kind of limekiln combined denitration system, including compressed air reservoir, reducing agent storage tank, desalination water storage tank, denitrfying agent storage tank and limekiln.Limekiln is equipped with reducing agent spray gun and denitrfying agent spray gun, and compressed air reservoir is in charge of the compressed air inlet that each reducing agent spray gun and denitrfying agent spray gun are connected respectively to compressed air branch pipe by compressed air main pipe, compressed air.Reducing agent storage tank is in charge of the reducing agent entrance that each reducing agent spray gun is connected to reducing agent branch pipe by reducing agent main pipe, reducing agent.Denitrfying agent storage tank is connected to static mixer by denitration pump and gauge, desalination water storage tank is connected to static mixer by desalination water pump and gauge, and static mixer is in charge of the denitrfying agent entrance that each denitrfying agent spray gun is connected to denitrfying agent branch pipe by denitrfying agent main pipe, denitrfying agent.The present invention carries out denitration using the combined denitration system that denitrfying agent denitration and reducing agent denitration are combined, and improves the denitration efficiency of limekiln flue gas selective non-catalytic reduction.
Description
Technical field
The invention belongs to industrial furnace tail gas disposal technique fields, are related to a kind of denitration device, and in particular to a kind of lime
Kiln combined denitration system.
Background technology
Flue gas is the predominant emissions in limekiln, and burn the gaseous mixture generated with decomposition of limestone for combustible in kiln body
Body.It, can be dirty if these nitrogen oxides are directly discharged in air due to containing a large amount of nitrogen oxide NOx such as NO in flue gas
Air is contaminated, photochemical fog and acid rain is formed, is detrimental to health, therefore flue gas has to pass through denitrogenation before discharge（It is i.e. de-
Nitre）Processing.
At present there are mainly two types of gas denitrifying technologies：Selective recall reduction（SCR）Technology and selective non-catalytic reduction
（SNCR）Technology.Selective non-catalytic reduction（SNCR）Denitration is the condition in inapplicable catalyst the reducing agent containing amino
Lower uniformly to spray into the region that flue-gas temperature is 850-1050 DEG C, the selective NOx in flue gas is reduced to N2And H2O, to reach
The purpose of emission reduction nitrogen oxides.In addition find that the reducing agents such as methane, hydrogen, carbon monoxide are sprayed into high-temperature flue gas also to be had centainly
Denitration effect.The SNCR denitration technique of the prior art is applied in circulating fluidized bed boiler, denitration efficiency between 30-50%,
Not yet find that SNCR denitration is applied to limekiln denitrating flue gas field, the prior art cannot fully meet limekiln flue gas emission
Quality requirement.
Invention content
The object of the present invention is to provide a kind of limekiln combined denitration systems, and denitrfying agent denitration is mutually tied with reducing agent denitration
Altogether, combined denitration is carried out, to improve the denitration efficiency of limekiln flue gas selective non-catalytic reduction.
The technical scheme is that：Limekiln combined denitration system including compressed air reservoir, reducing agent storage tank, is removed
Brine reservoir, denitrfying agent storage tank, wastewater treatment equipment, static mixer and limekiln, denitrfying agent storage tank and wastewater treatment equipment
Connection.Limekiln is equipped with reducing agent spray gun and/or denitrfying agent spray gun, and reducing agent spray gun is equipped with reducing agent entrance and compressed air enters
Mouthful, denitrfying agent spray gun is equipped with denitrfying agent entrance and compressed air inlet.Compressed air reservoir is by compressed air main pipe, also compress
Air is in charge of the compressed air inlet that each reducing agent spray gun and denitrfying agent spray gun are connected respectively to compressed air branch pipe.Reducing agent
Storage tank is in charge of the reducing agent entrance that each reducing agent spray gun is connected to reducing agent branch pipe by reducing agent main pipe, reducing agent, reduction
Agent main pipe is equipped with gauge.Denitrfying agent storage tank is connected to static mixer by denitration pump and gauge, and desalination water storage tank passes through
Desalination water pump and gauge are connected to static mixer, and static mixer is in charge of by denitrfying agent main pipe, denitrfying agent and denitrfying agent
Branch pipe is connected to the denitrfying agent entrance of each denitrfying agent spray gun.
Limekiln is double thorax kilns, rotary kiln sleeve kiln, beam type kiln or annular to firing.Double thorax kilns are equipped with burning zone and lead to
Road, channel are equipped with reducing agent spray gun and/or denitrfying agent spray gun, and reducing agent spray gun and denitrfying agent spray gun are in two kiln thoraxes of double thorax kilns
It is circular layout.Burning zone be equipped with denitrfying agent spray gun, reducing agent spray gun or composite spray gun or denitrfying agent spray gun, reducing agent spray gun and
The arbitrary the two combination of composite spray gun or denitrfying agent spray gun, reducing agent spray gun and composite spray gun are set simultaneously.Composite spray gun is equipped with also
Former agent atomizer, reducing agent atomizer are equipped with denitrfying agent entrance and compressed air inlet, and the outlet of reducing agent atomizer is connected to
The cooling medium channel of spray gun.Static mixer is in charge of by denitrfying agent main pipe, denitrfying agent is connected to reduction with denitrfying agent branch pipe
The denitrfying agent entrance of agent atomizer, compressed air reservoir are in charge of and compressed air branch pipe by compressed air main pipe, compressed air
It is connected to the compressed air inlet of reducing agent atomizer.
Burning zone and channel all setting denitrfying agent spray gun or whole setting reducing agent spray guns, or both set simultaneously, two
Person's quantitative proportion is arbitrarily adjusted, and the two sum is arbitrary to be adjusted.Composite spray gun is individual layer or the sleeve structure of bilayer, is sleeved on fuel
Compound ejection denitrfying agent and/or reducing agent on spray gun；Or denitrfying agent spray gun/reducing agent spray gun is separately provided, it is sprayed independently of fuel
Rifle, position is above Fuel lance or below Fuel lance, so as to so that denitrfying agent spray gun reaches deeper ground at higher temperature
Side.Denitrfying agent spray gun and reducing agent spray gun work under calcined state or work under heat storage state.Denitrfying agent spray gun and reduction
Agent spray gun works under the conditions of flue gas downstream or works under the conditions of flue gas adverse current.
Rotary kiln includes kiln hood, kiln tail and preheater, and preheater is connect with kiln tail.Kiln tail set reducing agent spray gun and/or
Denitrfying agent spray gun.Kiln tail all setting denitrfying agent spray gun or all setting reducing agent spray gun, or both set simultaneously, the two number
Amount ratio is arbitrarily adjusted, and the two sum is arbitrary to be adjusted.It sprays with fuel or individually sprays after the compressed air atomizing of denitrfying agent
Go out.Denitrfying agent is ammonium hydroxide or urea or the mixture of both of the above.Reducing agent is hydrogen, methane or carbon monoxide or above-mentioned gas
The mixture of the mixture of body or carbon containing reducibility gas or liquid or solid or more substance.
Beam type kiln is equipped with preheating zone, burning zone and cooling zone, and preheating zone is equipped with upper suction bar, and the lower part of upper suction bar is equipped with
Denitration beam, burning zone are equipped with burning beam, and cooling zone is equipped with lower suction bar.Upper suction bar is equipped with denitration spray gun, lower pumping beam and de-
Nitre beam is equipped with denitration channel, and denitration spray gun and denitration channel are equipped with denitrfying agent atomizer, and denitrfying agent atomizer enters equipped with denitrfying agent
Mouth and compressed air inlet.Static mixer is in charge of by denitrfying agent main pipe, denitrfying agent is connected to upper pumping with denitrfying agent branch pipe
The denitrfying agent entrance of the denitration atomizer of beam lower part denitration spray gun, denitration beam denitration channel and lower pumping beam denitration channel.Compression
Air reservoir is in charge of by compressed air main pipe, compressed air is connected respectively to each denitration spray gun and denitration with compressed air branch pipe
The compressed air inlet of the denitrfying agent atomizer of channel.
The outlet of desalination water storage tank and denitrfying agent storage tank is equipped with filter, and desalination water storage tank is connected to desalination by filter
Water pump, tank used for storing ammonia denitrfying agent storage tank are connected to denitration by filter and pump.Desalination water storage tank and denitrfying agent storage tank are respectively equipped with
Return line, desalination water pump outlet return to desalination water storage tank by return line all the way.Denitration pump is connected by return line
To denitrfying agent storage tank.Denitrfying agent, which is in charge of, is equipped with reversal valve, controls the commutation of ammonium hydroxide.Reducing agent, which is in charge of, is equipped with reversal valve,
Control the switch operation of reducing agent.
Denitrfying agent denitration and reducing agent denitration are combined together by combined denitration system in limekiln of the present invention, and it is de- to carry out joint
Nitre improves the denitration efficiency of limekiln flue gas selective non-catalytic reduction.Double thorax kilns are using composite spray gun in accumulation of heat thorax by spraying
The ammonium hydroxide denitrfying agent fog that rifle cooling medium channel is sprayed into after the atomization of reducing agent atomizer is contacted with flue gas adverse current, is increased anti-
Between seasonable, denitration efficiency is improved, while the cooling medium for also serving as spray gun is used.The ammonium hydroxide that rotary kiln denitrfying agent spray gun sprays
It is contacted with flue gas adverse current, increases the reaction time, improve denitration efficiency.
The advantageous effect of combined denitration system in limekiln of the present invention is compared with prior art：1. denitrfying agent denitrating system
Wastewater treatment equipment is set, ammonium hydroxide in denitrfying agent storage tank can in emergency circumstances be discharged rapidly and carry out harmless treatment.2. join
Denitrating system setting reversal valve is closed, the supply of ammonium hydroxide commutates with the periodically commutation of double thorax kilns, realizes denitration pump and desalination
Water pump is continuously run, and is avoided the frequent unlatching of pump, is extended its service life.3. denitrfying agent spray gun uses high temperature resistant material system
Make, high-temperature corrosion resistance, wear-resistant, load regulation rate is big, atomized particle size is thin, output is big, ammonia pressures are low, gas consumption is small, validity period
Limit for length expands the load range of combined denitration system, improves denitration effect, advantageously reduces atomizing medium consumption,
Reduce power consumption.4. denitration pump, desalination water pump are the using and the reserved, filter is respectively provided with before pump, improves combined denitration
The stability of system.5. denitration pump and desalination water pump setting return line, prevent equipment damage and system overload, improve connection
Close the safety of denitrating system；6. reducing agent spray gun is made, high-temperature corrosion resistance, wear-resistant, Load Regulation of high temperature resistant material
Than big, the load range of system is expanded.
Description of the drawings
Fig. 1 is the flow diagram of combined denitration system in limekiln of the present invention；
Fig. 2 is the schematic diagram of double thorax kiln denitrating systems；
Fig. 3 is the schematic diagram of another embodiment of the present invention；
Fig. 4 is the schematic diagram of yet another embodiment of the present invention；
Wherein：1-compressed air reservoir, 2-reducing agent storage tank, 3-desalination water storage tank, 4-denitrfying agent storage tank, at 5-waste water
Manage device, 6-exhaust gases passes, 7-lance ejection area, 8-gauge, 9-desalination water pump, 10-denitration pump, 11-valve,
12-check-valves, 13-filter, 14-static mixer, 15-compressed air main pipe, 16-cooling medium channel, 17-also
Former agent atomizer, 18-reducing agent main pipe, 19-denitrfying agent main pipe, 20-reducing agent branch pipe, 21-compressed air branch pipe, 22-
Reducing agent spray gun, 23-reversal valve, 24-denitrfying agent branch pipe, 25-denitrfying agent are in charge of, 26-reducing agent is in charge of, 27-compound spray
Rifle, 28-denitrfying agent spray gun, 29-rotary kiln, 30-preheater, 31-return line, 32-overflow valve, 33-compressed air
Be in charge of, 34-burning zone, 35-preheating zone, 36-cooling zone, 37-discharge port, 38-feed system, 39-upper suction bar,
40-denitration spray gun, 41-denitration beam, 42-burning beam, 43-lower suction bar, 44-denitration channel, 45-beam type kiln.
Specific embodiment
With reference to embodiment and attached drawing, the present invention is described in detail.The scope of the present invention is not limited to embodiment,
Those skilled in the art make any change in the range of claim restriction and also belong to the scope of protection of the invention.
Embodiment 1
Combined denitration system in limekiln of the present invention is as shown in Figure 1, including compressed air reservoir 1, reducing agent storage tank 2, demineralized water storage
Tank 3, denitrfying agent storage tank 4, wastewater treatment equipment 5, static mixer 14 and limekiln.Reducing agent in reducing agent storage tank 2 is hydrogen
Gas, the denitrfying agent in denitrfying agent tank are ammonium hydroxide.Denitrfying agent storage tank is equipped with automatic overflow pipeline and discharge pipeline, and at waste water
Reason device communicates.Limekiln is double thorax kilns, as shown in Fig. 2, double thorax kilns are equipped with channel 6 and burning zone 34, channel is equipped with reducing agent
Spray gun 22 and denitrfying agent spray gun 28, reducing agent spray gun and denitrfying agent spray gun are circular layout in two kiln thoraxes of double thorax kilns.Reducing agent
Spray gun and denitrfying agent spray alternate setting, and reducing agent spray gun and denitrfying agent lance ejection point are located in the exhaust gases passes of double thorax kilns, also
Former agent lance ejection point is not repeated with denitrfying agent lance ejection point.Burning zone 34 is equipped with composite spray gun 27, and composite spray gun is equipped with also
Former agent atomizer 17, reducing agent atomizer are equipped with denitrfying agent entrance and compressed air inlet, and the outlet of reducing agent atomizer connects
To the cooling medium channel 16 of spray gun.Ammonium hydroxide enters composite spray gun 27 by cooling medium channel 16 after atomization, is ejected into compound
Lance ejection area 7.Reducing agent spray gun be equipped with reducing agent entrance and compressed air inlet, denitrfying agent spray gun be equipped with denitrfying agent entrance and
Compressed air inlet, reducing agent atomizer are equipped with denitrfying agent entrance and compressed air inlet.Compressed air reservoir 1 is empty by compressing
Gas main pipe 15, compressed air be in charge of 33 and compressed air branch pipe 21 be connected respectively to each reducing agent spray gun, reducing agent atomizer and
The compressed air inlet of denitrfying agent spray gun sum.Reducing agent storage tank 2 is in charge of 26 and reducing agent branch by reducing agent main pipe 18, reducing agent
Pipe 20 is connected to the reducing agent entrance of each reducing agent spray gun, and reducing agent main pipe is equipped with gauge 8.Reducing agent, which is in charge of on 26, to be equipped with
Reversal valve 23 controls the switch operation of reducing agent.The outlet of desalination water storage tank and denitrfying agent storage tank is equipped with filter, demineralized water storage
Tank is connected to desalination water pump by filter, and desalination water pump outlet is divided by check-valves 12 and valve 11 for two-way, is passed through all the way
Gauge 8 is connected to static mixer 14, is connected to the reflux inlet of desalination water storage tank, return duct by return line 31 all the way
Road is equipped with valve 11 and overflow valve 32.Denitrfying agent storage tank is connected to denitration pump 10 by filter.Denitration pump discharge passes through non-return
Valve 12 and valve 11 divide for two-way, are connected to static mixer 14 by gauge 8 all the way, are connected all the way by return line 31
To the reflux inlet of denitrfying agent storage tank, return line is equipped with valve 11 and overflow valve.Static mixer by denitrfying agent main pipe 19,
Denitrfying agent be in charge of 25 and denitrfying agent branch pipe 24 be connected to the denitrfying agent entrance of each denitrfying agent spray gun and reducing agent atomizer 17.It is de-
Nitre agent is in charge of 25 and is equipped with reversal valve 23, controls the commutation of ammonium hydroxide.Denitration pump and desalination water pump are respectively 2, the using and the reserved.Reduction
Agent branch pipe 20, compressed air branch pipe 21 and denitrfying agent branch pipe 24 are equipped with valve 11 and check-valves 12.
Ammonium hydroxide through denitrfying agent main pipe after denitrfying agent is in charge of, wherein the spray gun of three road denitrfying agent branch pipes supply accumulation of heat kiln thoraxes,
The cooling medium channel through composite spray gun is sprayed into the kiln thorax of heat storage state after being atomized by reducing agent atomizer, is connect with flue gas adverse current
It touches, while the ammonium hydroxide fog being atomized also serves as cooling spray gun and is used.At this time compressed air as atomized ammonia atomizing medium it
With.Combustion chamber composite spray gun stops supply ammonium hydroxide, only supplies compressed air, and compressed air is used as cooling spray gun at this time.
Burning zone and channel all setting denitrfying agent spray gun or whole setting reducing agent spray guns, or both set simultaneously, two
Person's quantitative proportion is arbitrarily adjusted, and the two sum is arbitrary to be adjusted.Composite spray gun is individual layer or the sleeve structure of bilayer, is sleeved on fuel
On spray gun.When composite spray gun be individual layer sleeve structure, refer to Fuel lance outer ring set a snare pipe, denitrfying agent and/or also
Former agent is sprayed out of Fuel lance outer ring is set with endless tube；When composite spray gun be double-layer sleeve structure, refer to outside Fuel lance
Circle two snare pipes of setting, denitrfying agent and reducing agent are sprayed out of Fuel lance outer ring is set with endless tube respectively；It can also be by endless tube
It is compounded in Fuel lance, is individual spray gun structure in fuel injection pipe, denitrfying agent and/or reducing agent are sprayed with fuel
Go out.Or denitrfying agent spray gun/reducing agent spray gun is separately provided, independently of Fuel lance, position is above Fuel lance or in fuel
Below spray gun, so as to so that denitrfying agent spray gun reaches deeper place at higher temperature.It is adjoint after the compressed air atomizing of denitrfying agent
Fuel is sprayed or is individually sprayed；Denitrfying agent spray gun and reducing agent spray gun work under the conditions of flue gas downstream or in flue gas adverse current items
It works under part.
Double thorax kiln combined denitration systems are connected in parallel under PLC system control, are worked automatically by program, process is：（1）Ammonia water tank
Ammonia pipeline is unloaded in vehicle access, and ammonia pump is unloaded in unlatching, and ammonium hydroxide enters denitrfying agent storage tank 4 after being filtered, ammonium hydroxide in denitrfying agent storage tank
Mass concentration be 20-25%.（2）Ammonium hydroxide in denitrfying agent storage tank flows out due to the suction that denitration pump generates, by 13 mistake of filter
After filter, pump into denitration, into denitrfying agent main pipe, after gauge is measured, enter together with the demineralized water being filtered
Static mixer 14 mixes, and the mass concentration of ammonium hydroxide is 8-15% after static mixer.Low concentration ammonia after mixed diluting
Water enters denitrfying agent main pipe 19 on kiln.（3）Denitrfying agent main pipe is by the corresponding denitrfying agent of the double thorax kilns of low concentration ammonia moisture dispensing on kiln
It is in charge of, denitrfying agent is in charge of distributes to denitrfying agent branch pipe by ammonium hydroxide again, into the denitrfying agent spray gun positioned at double thorax kiln exhaust gases passes, warp
Enter denitration in kiln after compressed air atomization.Two kiln thorax switch operations, alternately calcining and accumulation of heat.Denitrfying agent denitration
Cheng Zhong, atomizing medium of the compressed air as ammonium hydroxide, while as cold to stopping the denitrfying agent spray gun of supply ammonium hydroxide during commutation
But cooling medium.（4）Denitrfying agent branch pipe is commutated and stopped during supply ammonium hydroxide, is continued empty to the supply compression of denitrfying agent spray gun
Gas, the cooling denitrfying agent spray gun of compressed air conduct at this time are used.（5）When denitrfying agent working pressure of pipeline is higher than ammonium hydroxide return line
During overflow valve pressure set points, overflow valve is opened, and ammonium hydroxide excess flow is back to denitrfying agent storage tank through ammonium hydroxide return line.
（6）When desalination water piping system operating pressure is higher than demineralized water return line overflow valve pressure set points, overflow valve is opened,
Demineralized water excess flow is back to desalination water storage tank through demineralized water return line.（7）When tank used for storing ammonia denitrfying agent tank level height
When highest liquid level, ammonium hydroxide automatic overflow to wastewater treatment equipment.When being in an emergency, open denitrfying agent tank bottom and unload
Put pipeline, the ammonium hydroxide discharge in denitrfying agent storage tank and kiln upper pipeline to wastewater treatment equipment.（8）Denitrfying agent main pipe and demineralized water
Pipeline is equipped with flow measurement device, can monitor ammonium hydroxide flow and desalination water flow in real time, realize the accurate control to ammonia concn
System.（9）It sets coarse filter, denitration that fine filtrator is set before pumping preceding and desalination water pump before unloading ammonia pump, prevents sundries from entering system
It is interior, prevent system jams and damage equipment.Denitration pump and desalination water pump prevent equipment damage and system mistake using the using and the reserved
It carries, ensures that system is safe and stable.（10）There is overflow valve level pressure overflow effect, pressure stabilization function, system unloaded effect, safety to protect
Shield acts on, and ensures that system pressure is constant.（11）Reducing agent enters reducing agent main pipe because of pressure difference in reducing agent storage tank, through flow measurement
After device metering, distribute to the corresponding reducing agent of calcining thorax and be in charge of, reallocate and give reducing agent branch pipe, into reducing agent spray gun, spray
It is incident upon denitration in double thorax kiln exhaust gases passes.（12）Reducing agent branch pipe is commutated and stopped during supply reducing agent, and reducing agent spray gun is opened
Begin supply compressed air, and compressed air is used as cooling reducing agent spray gun at this time.Reducing agent denitrating system and denitrfying agent denitration
System is used cooperatively, and improves denitration efficiency.
Embodiment 2
For another embodiment of the present invention as shown in figure 3, limekiln is rotary kiln 29, rotary kiln includes kiln hood, kiln tail and preheating
Device 30, preheater is connect with kiln tail.Reducing agent spray gun 22 and denitrfying agent spray gun 28 are arranged on kiln tail.Reducing agent spray gun is equipped with reduction
Agent entrance and compressed air inlet, denitrfying agent spray gun are equipped with denitrfying agent entrance and compressed air inlet.Compressed air reservoir passes through
Compressed air main pipe 15, compressed air 33 are in charge of is connected respectively to reducing agent spray gun and denitrfying agent spray gun with compressed air branch pipe 21
The compressed air inlet of sum.Reducing agent storage tank 2 by reducing agent main pipe 18, reducing agent be in charge of 26 and reducing agent branch pipe 20 be connected to
The reducing agent entrance of each reducing agent spray gun.The outlet of desalination water storage tank and denitrfying agent storage tank is equipped with filter, and desalination water storage tank leads to
It crosses filter and is connected to desalination water pump, desalination water pump outlet is divided by check-valves 12 and valve 11 for two-way, passes through desalination all the way
Water pump 9 and gauge 8 are connected to static mixer 14, are connected to passing back into for desalination water storage tank by return line 31 all the way
Mouthful.Denitrfying agent storage tank is connected to denitration pump 10 by filter.Denitration pump discharge is divided by check-valves 12 and valve 11 for two-way,
Static mixer 14 is connected to by denitration pump 10 and gauge 8 all the way, being connected to denitrfying agent by return line 31 all the way stores up
The reflux inlet of tank.Static mixer by denitrfying agent main pipe 19, denitrfying agent be in charge of 25 and denitrfying agent branch pipe 24 be connected to it is each de-
The denitrfying agent entrance of nitre agent spray gun and reducing agent atomizer 17.Reducing agent in reducing agent storage tank 2 is carbon monoxide.Denitration pumps
It is respectively 2 with desalination water pump, the using and the reserved.The operation of the present embodiment is same as Example 1.
Embodiment 3
For another embodiment of the present invention as shown in figure 4, limekiln is beam type kiln 45, beam type kiln includes feed system 38, kiln body
With discharge port 37.Preheating zone 35, burning zone 34 and cooling zone 36 are equipped in kiln body.Preheating zone is equipped with upper suction bar 39, upper suction
The lower part of beam is equipped with denitration beam 41, and burning zone is equipped with burning beam 42, and cooling zone is equipped with lower suction bar 43.Upper suction bar is equipped with denitration
Spray gun 40, lower pumping beam and denitration beam are equipped with denitration channel 44, and denitration spray gun and denitration channel are equipped with denitrfying agent atomizer, denitration
Agent atomizer is equipped with denitrfying agent entrance and compressed air inlet.Desalination water storage tank is connected to quiet by desalination water pump and gauge 8
State mixer 14, denitrfying agent storage tank are connected to static mixer 14 by denitration pump 10 and gauge 8.Static mixer passes through de-
Nitre agent main pipe 19, denitrfying agent be in charge of 25 and denitrfying agent branch pipe 24 be connected respectively to pumping beam lower part denitration spray gun 40, denitration beam
The denitrfying agent entrance of the denitration atomizer of denitration channel and lower pumping beam denitration channel 44.Compressed air reservoir 1 is empty by compressing
Gas main pipe 15, compressed air are in charge of 33 and compressed air branch pipe 21 is connected respectively to the denitration mist of each denitration spray gun and denitration channel
Change the compressed air inlet of device.
Ammonium hydroxide after nitre agent main pipe 19, denitrfying agent are in charge of 25, respectively pumping beam lower part denitration spray gun in supply, denitration beam,
The corresponding denitrfying agent branch pipe 24 of lower pumping beam denitration channel, through upper pumping beam lower part denitration spray after being atomized by denitrfying agent atomizer
Rifle, denitration beam, lower pumping beam denitration channel respectively enter preheating zone, cooling zone, are mixed with flue gas and carry out denitration, and compression is empty at this time
Gas is used as the atomizing medium of atomized ammonia.Upper pumping beam lower part denitration spray gun, denitration beam, lower pumping beam denitration channel stop
When supplying ammonium hydroxide, continue to supply compressed air, compressed air is used as cooling medium at this time.
Claims (10)
1. a kind of limekiln combined denitration system, including compressed air reservoir（1）, reducing agent storage tank（2）, desalination water storage tank（3）、
Denitrfying agent storage tank（4）, wastewater treatment equipment（5）, static mixer（14）And limekiln, denitrfying agent storage tank and wastewater treatment equipment
Connection；It is characterized in that：The limekiln is equipped with reducing agent spray gun（22）And/or denitrfying agent spray gun（28）, the reducing agent spray gun
Equipped with reducing agent entrance and compressed air inlet, the denitrfying agent spray gun is equipped with denitrfying agent entrance and compressed air inlet；It is described
Compressed air reservoir（1）Pass through compressed air main pipe（15）, compressed air is in charge of（33）With compressed air branch pipe（21）Connect respectively
It is connected to the compressed air inlet of each reducing agent spray gun and denitrfying agent spray gun；The reducing agent storage tank（2）Pass through reducing agent main pipe
（18）, reducing agent is in charge of（26）With reducing agent branch pipe（20）It is connected to the reducing agent entrance of each reducing agent spray gun, the reducing agent
Main pipe is equipped with gauge（8）；The denitrfying agent storage tank is pumped by denitration（10）And gauge（8）Static mixer is connected to, institute
State desalination water storage tank（3）Pass through desalination water pump（9）And gauge（8）It is connected to static mixer（14）, the static mixer
Pass through denitrfying agent main pipe（19）, denitrfying agent is in charge of（25）With denitrfying agent branch pipe（24）The denitrfying agent for being connected to each denitrfying agent spray gun enters
Mouthful.
2. combined denitration system in limekiln according to claim 1, it is characterized in that：The limekiln is double thorax kilns, revolution
Kiln（29）, sleeve kiln, beam type kiln or annular to firing.
3. combined denitration system in limekiln according to claim 2, it is characterized in that：Double thorax kilns are equipped with burning zone（34）
And channel（6）, the channel（6）Equipped with reducing agent spray gun（22）And/or denitrfying agent spray gun（28）, the reducing agent spray gun and de-
Nitre agent spray gun is circular layout in two kiln thoraxes of double thorax kilns；The burning zone is equipped with denitrfying agent spray gun（28）, reducing agent spray gun
（22）Or composite spray gun（27）Or the arbitrary the two combination of denitrfying agent spray gun, reducing agent spray gun and composite spray gun or denitrfying agent spray
Rifle, reducing agent spray gun and composite spray gun are set simultaneously；Composite spray gun is furnished with reducing agent atomizer, and reducing agent atomizer is equipped with denitration
Agent entrance and compressed air inlet, the outlet of reducing agent atomizer are connected to the cooling medium channel of spray gun（16）；The static state
Mixer passes through denitrfying agent main pipe（19）, denitrfying agent is in charge of（25）With denitrfying agent branch pipe（24）It is connected to the de- of reducing agent atomizer
Nitre agent entrance, the compressed air reservoir（1）Pass through compressed air main pipe（15）, compressed air is in charge of（33）And compressed air
Branch pipe（21）It is connected to the compressed air inlet of reducing agent atomizer.
4. combined denitration system in limekiln according to claim 3, it is characterized in that：The burning zone and channel are all set
Denitrfying agent spray gun or all setting reducing agent spray gun, or both set simultaneously, the two quantitative proportion is arbitrarily adjusted, and the two is total
It is arbitrary to adjust；Composite spray gun is individual layer or the sleeve structure of bilayer, is sleeved on compound ejection denitrfying agent on Fuel lance and/or goes back
Former agent；Or denitrfying agent spray gun/reducing agent spray gun is separately provided, independently of Fuel lance, position is above Fuel lance or is firing
Expect below spray gun, so as to so that denitrfying agent spray gun reaches deeper place at higher temperature；The compressed air atomizing of denitrfying agent
It sprays with fuel or individually sprays afterwards；Denitrfying agent spray gun and reducing agent spray gun work under calcined state or in heat storage state
Lower work；Denitrfying agent spray gun and reducing agent spray gun work under the conditions of flue gas downstream or work under the conditions of flue gas adverse current.
5. combined denitration system in limekiln according to claim 2, it is characterized in that：The rotary kiln（29）Including kiln hood,
Kiln tail and preheater（30）, preheater connect with kiln tail；The kiln tail sets reducing agent spray gun（22）And/or denitrfying agent spray gun
（28）；The kiln tail all setting denitrfying agent spray gun or whole setting reducing agent spray guns, or both set simultaneously, the two quantity
Ratio is arbitrarily adjusted, and the two sum is arbitrary to be adjusted；It sprays with fuel or individually sprays after the compressed air atomizing of denitrfying agent.
6. combined denitration system in limekiln according to claim 2, it is characterized in that：The beam type kiln（45）Equipped with preheating zone
（35）, burning zone（34）And cooling zone（36）, the preheating zone is equipped with upper suction bar（39）, the lower part of the upper suction bar is equipped with
Denitration beam（41）, the burning zone is equipped with burning beam（42）, the cooling zone is equipped with lower suction bar（43）；The upper suction bar is set
There is denitration spray gun（40）, the lower pumping beam and denitration beam are equipped with denitration channel（44）；The denitration spray gun（40）Lead to denitration
Road（44）Equipped with denitrfying agent atomizer, denitrfying agent atomizer is equipped with denitrfying agent entrance and compressed air inlet；The static mixing
Device passes through denitrfying agent main pipe（19）, denitrfying agent is in charge of（25）With denitrfying agent branch pipe（24）It is connected to pumping beam lower part denitration spray gun
（40）, denitration beam denitration channel and lower pumping beam denitration channel（44）Denitrfying agent atomizer denitrfying agent entrance；The compression
Air reservoir（1）Pass through compressed air main pipe（15）, compressed air is in charge of（33）With compressed air branch pipe（21）It is connected respectively to
The compressed air inlet of the denitrfying agent atomizer of each denitration spray gun and denitration channel.
7. combined denitration system in limekiln according to claim 1, it is characterized in that：The desalination water storage tank（3）And denitration
Agent storage tank（4）Outlet be equipped with filter（13）, the desalination water storage tank（3）Desalination water pump is connected to by filter（9）, institute
It states denitrfying agent storage tank and denitration pump is connected to by filter（10）.
8. combined denitration system in limekiln according to claim 1, it is characterized in that：The desalination water storage tank（3）And denitration
Agent storage tank（4）It is respectively equipped with return line（31）, the desalination water pump（9）Outlet returns to demineralized water by return line all the way
Storage tank；The denitration pump（10）Denitrfying agent storage tank is connected to by return line（4）.
9. combined denitration system in limekiln according to claim 1, it is characterized in that：The denitrfying agent is in charge of（25）It is equipped with
Reversal valve（23）, control the commutation of ammonium hydroxide；The reducing agent is in charge of（26）On reversal valve is installed, the commutation of reducing agent is controlled to grasp
Make.
10. combined denitration system in limekiln according to claim 1, it is characterized in that：The denitrfying agent is ammonium hydroxide or urea
Or the mixture of both of the above；The reducing agent is hydrogen, methane or carbon monoxide or the mixture or carbon containing of above-mentioned gas
Reducibility gas or liquid or solid or more substance mixture.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018101322250 | 2018-02-09 | ||
| CN201810132225 | 2018-02-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108201778A true CN108201778A (en) | 2018-06-26 |
Family
ID=62606805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810189031.4A Pending CN108201778A (en) | 2018-02-09 | 2018-03-08 | A kind of limekiln combined denitration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108201778A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109045971A (en) * | 2018-08-13 | 2018-12-21 | 中国华能集团有限公司 | CHiWith NHiThe denitration of boiler smoke method and system of collaboration |
| CN110327754A (en) * | 2019-07-26 | 2019-10-15 | 启明星宇节能科技股份有限公司 | A kind of tunnel stove denitrating system |
| CN111006500A (en) * | 2019-11-13 | 2020-04-14 | 石家庄新华能源环保科技股份有限公司 | Industrial shaft kiln for producing lime |
| CN111302674A (en) * | 2020-02-26 | 2020-06-19 | 上海柯来浦能源科技有限公司 | Beam type lime kiln with auxiliary beam |
| CN112791571A (en) * | 2021-01-04 | 2021-05-14 | 河北用邦环保设备科技有限公司 | Online denitration method for double-hearth kiln |
| CN111302674B (en) * | 2020-02-26 | 2024-06-21 | 上海柯来浦能源科技有限公司 | Beam lime kiln with auxiliary beam |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992660A (en) * | 2012-12-25 | 2013-03-27 | 石家庄新华能源环保科技股份有限公司 | Low-heat value fuel lime kiln |
| CN204469529U (en) * | 2015-04-22 | 2015-07-15 | 张少篪 | A kind of annealing kiln equipment for denitrifying flue gas |
| CN104785090A (en) * | 2015-04-22 | 2015-07-22 | 张少篪 | Annealing furnace flue gas denitration device and technology |
| CN104792154A (en) * | 2015-04-03 | 2015-07-22 | 石家庄新华能源环保科技股份有限公司 | Dividing wall type rotary kiln device |
| CN106237821A (en) * | 2016-07-21 | 2016-12-21 | 石家庄新华能源环保科技股份有限公司 | A kind of limekiln denitrating system |
| CN208574451U (en) * | 2018-02-09 | 2019-03-05 | 石家庄新华能源环保科技股份有限公司 | A kind of limekiln combined denitration system |
-
2018
- 2018-03-08 CN CN201810189031.4A patent/CN108201778A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992660A (en) * | 2012-12-25 | 2013-03-27 | 石家庄新华能源环保科技股份有限公司 | Low-heat value fuel lime kiln |
| CN104792154A (en) * | 2015-04-03 | 2015-07-22 | 石家庄新华能源环保科技股份有限公司 | Dividing wall type rotary kiln device |
| CN204469529U (en) * | 2015-04-22 | 2015-07-15 | 张少篪 | A kind of annealing kiln equipment for denitrifying flue gas |
| CN104785090A (en) * | 2015-04-22 | 2015-07-22 | 张少篪 | Annealing furnace flue gas denitration device and technology |
| CN106237821A (en) * | 2016-07-21 | 2016-12-21 | 石家庄新华能源环保科技股份有限公司 | A kind of limekiln denitrating system |
| CN208574451U (en) * | 2018-02-09 | 2019-03-05 | 石家庄新华能源环保科技股份有限公司 | A kind of limekiln combined denitration system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109045971A (en) * | 2018-08-13 | 2018-12-21 | 中国华能集团有限公司 | CHiWith NHiThe denitration of boiler smoke method and system of collaboration |
| CN110327754A (en) * | 2019-07-26 | 2019-10-15 | 启明星宇节能科技股份有限公司 | A kind of tunnel stove denitrating system |
| CN111006500A (en) * | 2019-11-13 | 2020-04-14 | 石家庄新华能源环保科技股份有限公司 | Industrial shaft kiln for producing lime |
| CN111302674A (en) * | 2020-02-26 | 2020-06-19 | 上海柯来浦能源科技有限公司 | Beam type lime kiln with auxiliary beam |
| CN111302674B (en) * | 2020-02-26 | 2024-06-21 | 上海柯来浦能源科技有限公司 | Beam lime kiln with auxiliary beam |
| CN112791571A (en) * | 2021-01-04 | 2021-05-14 | 河北用邦环保设备科技有限公司 | Online denitration method for double-hearth kiln |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108201778A (en) | A kind of limekiln combined denitration system | |
| CN106166437B (en) | A kind of cement kiln flue gas desulphurization system and method | |
| KR102093799B1 (en) | Integrated apparatus for treating exhaust gas using metal filter | |
| CN109821392A (en) | A kind of denitrating system and its control method of dry method cement rotary kiln | |
| CN208574451U (en) | A kind of limekiln combined denitration system | |
| CN204768208U (en) | Flue gas to chain boiler carries out SOx/NOx control integration system | |
| CN205995253U (en) | A kind of cement kiln flue gas desulphurization system | |
| CN204735100U (en) | Absorption system who carries out wet process oxidation denitration to flue gas of coal -fired chain boiler | |
| CN109529616A (en) | Cement kiln equipment for denitrifying flue gas | |
| CN108295652A (en) | Carbon rotary kiln flue gas desulfurization and denitrification UTILIZATION OF VESIDUAL HEAT IN integral process and system | |
| CN105983311A (en) | Desulfurization and denitrification integrated system for flue gas of chain-grate boiler | |
| CN208542022U (en) | Incineration flue gas non-catalytic reduction denitrating system based on high concentration reducing agent | |
| CN106731798A (en) | Granule materials Industrial Boiler flue gas denitrification system and method for denitration | |
| CN109999630A (en) | A kind of SNCR denitration system | |
| CN109092040A (en) | The method that garbage burning boiler Leachate site returns spray system and reduces NOx content | |
| CN106823757A (en) | Chain furnace composite denitration equipment | |
| CN110787609A (en) | Flue gas denitration device for tank furnace and denitration method thereof | |
| CN110141944A (en) | A kind of SNCR and PNCR synergistic combinations denitrating system and denitration method for flue gas for High-temp. kiln | |
| CN208449035U (en) | A kind of SNCR denitration system | |
| CN205461737U (en) | Non - catalytic reduction method deNOx systems of two reductant selectivity | |
| CN207970688U (en) | A kind of Industrial Stoves denitration modernization system | |
| CN210495849U (en) | SNCR and PNCR collaborative combined denitration system for high-temperature furnace | |
| CN202122907U (en) | Secondary-combination flue gas denitration device of oil burning boiler | |
| CN206404574U (en) | A kind of flue gas denitrification system | |
| CN110180367A (en) | A kind of gas-liquid mixed type denitration of boiler smoke Processes and apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |