CN209714765U - A kind of industrial smoke high temperature desulfurizing denitration dust removal system - Google Patents
A kind of industrial smoke high temperature desulfurizing denitration dust removal system Download PDFInfo
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- CN209714765U CN209714765U CN201920153280.8U CN201920153280U CN209714765U CN 209714765 U CN209714765 U CN 209714765U CN 201920153280 U CN201920153280 U CN 201920153280U CN 209714765 U CN209714765 U CN 209714765U
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Abstract
It further include by the sequentially connected desulfurizing tower of pipeline, whirlwind tower, quenched unit, ceramic integrated unit the utility model discloses a kind of industrial smoke high temperature desulfurizing denitration dust removal system, including UTILIZATION OF VESIDUAL HEAT IN unit；Desulfurizing tower includes desulfurizing tower and the pipeline that is connected with desulfurizing tower；Whirlwind tower includes whirlwind tower and the pipeline that is connected with whirlwind tower；Quenched unit includes feeding tower, tempering tower, ammonia reservoir, water reservoir；Ceramic integrated unit includes the ceramic catalytic reaction kettle of multiple parallel connections.This system integrates a variety of processing functions, and the concentration of SO2, NOX, fine particle can be effectively reduced；Can be improved the service life of device, realize high temperature desulfurizing, hence it is evident that reduce the content of fine particle, the setting of leading portion high temperature desulfurizing can reduce in low-temperature zone waste heat boiler, pipeline, the blocking corrosion of equipment etc. improves the service life and operation stability of device.The exhaust gas such as the good mutually standby realization desulphurization denitration dedusting of system are continuously uninterruptedly handled.
Description
Technical field
The utility model relates to environment protection fields, and in particular to a kind of industrial smoke high temperature desulfurizing denitration dust removal system.
Background technique
The concern of environmental protection was continuously improved in China in recent years, and respective standard is also being continuously improved.Some industrial productions
Discharge standard must be reached by, which discharging pollutants, can just discharge.Main ingredient is fine particle, SO in the flue gas of industrial discharge2、
NOXDeng, the industries kiln such as glass burning petroleum is burnt or the flue gas of other fossil fuel discharges have sulfur content it is high, containing fluorination
Object, pollutant are complicated and have the characteristics that stickum, cause environmental protection treatment to reach preferable purification standard extremely difficult.
It is traditional desulphurization denitration dust removal process technique that the processing of kiln gas, which experienced the first kind: the flue gas of kiln discharge
At 500 DEG C or more, temperature is quenched into tempering tower progress between 350-400 DEG C after progress level-one UTILIZATION OF VESIDUAL HEAT IN first, quenched
Afterwards enter electric precipitator in be dusted, temperature is down to 330-380 DEG C after dedusting, into SCR denitration tower carry out denitration, then into
Row second level Heat Treatment, the temperature after second level Heat Treatment are down to 200 DEG C or so, carry out desulfurization into desulfurizing tower, desulfurization is laggard
Enter bag filter to be dusted, chimney is finally introduced by air-introduced machine and is excluded, temperature when discharge is 50-70 DEG C.
Electrostatic precipitation is carried out in temperature higher stage in above-mentioned traditional process, and efficiency of dust collection is low, and flue dust is usually in 50-
100mg/m3More than, subsequent SCR, which can be blocked, containing the harmful substances such as alkali metal and other heavy metals in the flue dust of high concentration takes off
Nitre tower, at the same make denitrating catalyst be poisoned in various degree reduce denitration effect increase the escaping of ammonia, this makes the service life of catalyst
Only 1 to two years；There is no the exhaust gas of desulfurization to contain a large amount of SO2Equal highly acids etchant gas and the ammonia of escape form hydrogen sulfate
Ammonium causes waste heat boiler and system pipeline seriously corroded, so that boiler and pipeline service life is short is usually no more than 1 year, is safeguarded
At high cost, system is unable to safe and stable operation；Bag-type dust can only achieve 30-50mg/m3, and the service life of cloth bag is usual
No more than 2 years；Traditional processing unit takes up a large area, and the discharge of final desulphurization denitration is 400mg/m3Left and right, is not achieved
The higher environmental emission standard of country.
Second class is ceramic integration desulfurization denitration dust pelletizing system, and this system relies primarily on the progress of ceramic catalytic reaction kettle
Desulphurization denitration dedusting.It is quenched subsequently into tempering tower that flue gas in kiln carries out level-one UTILIZATION OF VESIDUAL HEAT IN first, subsequently into ceramics
The lime-ash of catalytic reaction kettle, dedusting, desulphurization and denitration in a kettle, collection is excluded in bottom, and flue gas enters second segment waste heat benefit
Chimney discharge is introduced by air-introduced machine with rear.
The processing mode of second class is only applicable to the fuel of the cleaning such as natural gas, and the original sulfur content in flue gas is less than
1000mg/m3, and because adsorbent utilization rate is low, operating cost is relatively high.
When the sulfureous in flue gas content of discharge is 2000 or more, how to handle complicated flue gas and reach country to the height of flue gas
Discharge standard is the problem for the urgent need to resolve that present enterprise faces.
Utility model content
To solve the above-mentioned problems, the utility model provides a kind of industrial smoke high temperature desulfurizing denitration dust removal system, this
Kind system integrates a variety of processing functions, and SO can be effectively reduced2、NOX, fine particle concentration, make SO2、NOXIt discharges dense
Degree is less than 100mg/m3, the concentration of fine particle is less than 5mg/m3, realize high standard minimum discharge.
To achieve the above object, the utility model uses the following technical solution:
A kind of industrial smoke high temperature desulfurizing denitration dust removal system, including UTILIZATION OF VESIDUAL HEAT IN unit, for attracting smoke movement
Air-introduced machine and the chimney being connected with air-introduced machine for discharging clean flue gas, the UTILIZATION OF VESIDUAL HEAT IN unit include the first boiler,
Second boiler further includes by the sequentially connected desulfurizing tower of pipeline, whirlwind tower, quenched unit, ceramic integrated unit；
Wherein, the quenched unit includes feeding tower, tempering tower, ammonia reservoir, water reservoir；The ceramics integration is single
Member includes the ceramic catalytic reaction kettle of multiple parallel connections；
The flue gas emission mouth of first boiler is connected by pipeline with the desulfurizing tower gas inlet that desulfurizing tower lower part is arranged；
The desulfurizing tower exhanst gas outlet that desulfurizing tower top is arranged in is connected by pipeline with the whirlwind tower gas inlet on whirlwind tower top；Setting
Whirlwind tower exhanst gas outlet on whirlwind tower top is connected with the tempering tower gas inlet that tempering tower lower part is arranged in by pipeline, In
The feeding tower for launching fresh calcium hydroxide is provided on pipeline between whirlwind tower and tempering tower；The top of the tempering tower is provided with
Tempering tower exhanst gas outlet is connected with ceramic integrated unit by pipeline, and ceramic integrated unit passes through pipeline and the second boiler
It is connected, second boiler flue gas outlet is communicated with air-introduced machine；
System further includes cycling element, and the cycling element includes flue gas recirculation pipeline and calcium hydroxide circulation line, institute
It states on the pipeline that one end of flue gas recirculation pipeline is arranged between air-introduced machine and chimney, the other end is connected to desulfurizing tower in desulfurizing tower
On, the calcium hydroxide circulation line is arranged between ceramic catalytic reaction kettle and desulfurizing tower.
Former flue gas greater than 500 DEG C enters the first boiler after kiln discharge and carries out waste heat recycling, and temperature is reduced to 350-
400 DEG C, the former flue gas after the cooling of the first boiler enters desulfurizing tower from the lower section of desulfurizing tower by pipeline.Calcium hydroxide circulation pipe
Road will include that the useless ash of calcium hydroxide is transported to inside desulfurizing tower outside desulfurizing tower, by former flue gas by the useless ash including calcium hydroxide
It blows afloat, the SO in former flue gasXIt comes into full contact with, is reacted with calcium hydroxide, so that the substance containing S is detached from former flue gas and realizes for the first time
Desulfurization.It includes the useless grey into whirlwind tower of calcium hydroxide that former flue gas, which carries,.Useless ash comprising calcium hydroxide is in the mistake flowed to whirlwind tower
Cheng Zhong, containing S material, the reaction was continued carries out second desulfurization with flue gas in whirlwind tower.It include imperfect combustion in former flue gas
Emplastic, particle and the useless ash Jing Guo desulfurization, be dusted in whirlwind tower, the reacted calcium hydroxide of a part,
Be adsorbed with the calcium hydroxide block of stickum, particle is discharged in the discharge valve of the bottom of whirlwind tower, by storehouse pump arranged
Enter in waste bin, the flue gas that another part is flowed is carried along into pipeline.The flue gas being discharged from whirlwind tower enters tune by pipeline
Matter tower is provided with feeding tower for launching calcium hydroxide between whirlwind tower and tempering tower, and wherein the ratio of Ca and S is 2-5:1.Newly
Fresh calcium hydroxide enters tempering tower from the lower part of tempering tower with flue gas, and the flue gas flowed up drives calcium hydroxide to flow up, and adjusts
Injection water carries out temperature adjustment in matter tower, sprays ammonia denitration, and flue gas is reacted with fresh calcium hydroxide completes third time in tempering tower
Desulfurization.The flue gas being discharged from tempering tower top will be disappeared into the lower part of ceramic catalytic reaction kettle by the filtering of ceramic filter
Lime, particle, dust isolation, react with the calcium hydroxide of ceramic filter adsorption when flue gas enters ceramic filter, realize
4th desulfurization.Ammonia reacts realization denitration with nitrogen to flue gas under the action of catalyst when by inside ceramic filter.It is filtered
Calcium hydroxide, particle, dust fall by blowback and collected and pumped and be discharged by storehouse by discharger and storehouse pump discharge, a part
Waste bin another part is discharged into desulfurizing tower again and is recycled.The flue gas given off from ceramic catalytic reaction kettle has reached
The standard of discharge, treated sulfide in flue gas, nitrogen oxides are respectively less than 100mg/m3, the content of fine particle is less than
5mg/m3, the temperature of flue gas is 320-380 DEG C, and flue gas carries out UTILIZATION OF VESIDUAL HEAT IN by the second boiler, and temperature is reduced, arranged through air-introduced machine
Enter chimney.
The utility model compared with prior art, has the following beneficial effects:
1, the utility model is suitble to the flue gas of high sulfur content, high nitrogen-containing and complex component, and sulphur contains flue gas before treatment
Amount is generally in 2000-8000mg/m3, 100mg/m is respectively less than by Tthe utility model system processing after cure object, nitrogen oxides3,
The content of fine particle is less than 5mg/m3, discharge index is much better than national standard.
2, the prior art is all made of low-temp desulfurization, (NH4)HSO3The table of pipeline, equipment is easily adhered to when being lower than 147 DEG C
Face is the maximum cause of corrosion.300 DEG C or more desulfurization may be implemented in the desulfurizing tower of this system leading portion, ceramic integrated unit is de-
Sulphur denitration dust collecting, reduces (NH4)HSO3, blocking and etching problem of the sour corrosion substance to waste heat boiler, pipeline, increase
The operation stability of entire desulphurization denitration dust pelletizing system, improves the service life and utilization rate of waste heat of device.Service life can
It is up to 10 years or more with using, further reduced operation expense.
3, the utility model environment protection device has fully considered overhaul of the equipments needs, can ensure 10 years or more it is continuous net
Change processing flue gas to ensure that glass etc. is worked continuously kiln gas environment protection standard for many years.
Detailed description of the invention
Fig. 1 is the utility model flow chart；
Fig. 2 is utility model device connection schematic diagram；
Fig. 3 is the utility model ceramic catalytic reaction kettle structural schematic diagram；
Fig. 4 is the utility model ceramic filter structure schematic diagram；
Fig. 5 is the portion the A enlarged drawing of Fig. 4；
Fig. 6 is auxiliary smoke inlet pipe and Structure of Flue Gas Desulfuration Absorbing schematic diagram；
Fig. 7 is humidity, temperature to SO2The influence diagram of removing.
In figure, kiln 1, the first boiler 2, desulfurizing tower 3, whirlwind tower 4, feeding tower 5, tempering tower 6, the second boiler 7, ceramics are urged
Change reaction kettle 8, chimney 9, air-introduced machine 10, the first storehouse pump 11, supervisor 31, branch pipe 32, ammonia reservoir 61, water reservoir 62, ammonia pump
63, water pump 64, air-purifying chamber 81, exhaust air chamber 82, net gas outlet 83, discharger 84, waste residue outlet 85, reaction kettle gas inlet 86,
Ceramic filter 87, recoil mouth 88, branch pipe gas inlet 321, filter outlet 871, flue gas diffusion layer 875, surface stack layer
874, fibrous filter layer 873, inner cavity 872.
Specific embodiment
The utility model is described in further detail below in conjunction with Figure of description, and provides specific embodiment.
As shown in Figs 1-4, a kind of industrial smoke high temperature desulfurizing denitration dust removal system, including UTILIZATION OF VESIDUAL HEAT IN unit, for inhaling
The chimney 9 for drawing the air-introduced machine 10 of smoke movement and being connected with air-introduced machine 10 for discharging clean flue gas, the UTILIZATION OF VESIDUAL HEAT IN
Unit include the first boiler 2, the second boiler 7, further include by the sequentially connected desulfurizing tower 3 of pipeline, whirlwind tower 4, quenched unit,
Ceramic integrated unit；
Wherein, the quenched unit includes feeding tower 5, tempering tower 6, ammonia reservoir 61, water reservoir 62；Described ceramic one
Body unit includes ceramic catalytic reaction kettle 8；
The flue gas emission mouth of first boiler 2 passes through the desulfurizing tower gas inlet phase that pipeline is arranged with 3 lower part of desulfurizing tower
Even；The desulfurizing tower exhanst gas outlet that 3 top of desulfurizing tower is arranged in passes through the whirlwind tower gas inlet phase of pipeline and 4 top of whirlwind tower
Even；The whirlwind tower exhanst gas outlet that 4 top of whirlwind tower is arranged in and the tempering tower gas inlet that 6 lower part of tempering tower is arranged in pass through pipe
Road is connected, and the feeding tower 5 for launching fresh calcium hydroxide is provided on the pipeline between whirlwind tower 4 and tempering tower 6；The tempering tower
6 top is provided with tempering tower exhanst gas outlet and is connected with ceramic integrated unit by pipeline, and ceramic integrated unit passes through
Pipeline is connected with the second boiler 7, and 7 exhanst gas outlet of the second boiler is communicated with air-introduced machine 10；
System further includes cycling element, and the cycling element includes flue gas recirculation pipeline and calcium hydroxide circulation line, institute
It states on the pipeline that flue gas recirculation pipeline one end is arranged between air-introduced machine 10 and chimney 9, the other end is connected to the institute on desulfurizing tower 3
Calcium hydroxide circulation line is stated to be arranged between ceramic catalytic reaction kettle 8 and desulfurizing tower 3.
The upper one end of the ceramic catalytic reaction kettle 8 is provided with recoil mouth 88, and one end opposite with recoil mouth 88 is arranged
There is a net gas outlet 83, the lower part of ceramic catalytic reaction kettle 8 is provided with reaction kettle gas inlet 86, under ceramic catalytic reaction kettle 8
End is provided with waste residue outlet 85, and discharger 84 is provided in the waste residue outlet 85, is divided into exhaust gas inside ceramic catalytic reaction kettle 8
Room 82 and the air-purifying chamber 81 above exhaust air chamber 82, the exhaust air chamber 82 completely cut off with air-purifying chamber 81, reaction kettle gas inlet
86 are connected to exhaust air chamber 82, and the air-purifying chamber 81 is connected to recoil mouth 88, net gas outlet 83, in the ceramic catalytic reaction kettle 8
Portion is provided with the more ceramic filters 87 for desulphurization and denitration, dedusting.
The structure of the more ceramic filters 87 tubulose all the same that another end opening is closed in one end, is urged by load
The fibrous filter layer 873 of agent wraps up.
Second boiler 7 be connected to by pipeline with chimney 9, and air-introduced machine 10 be arranged the second boiler 7 and chimney 9 it
Between, the flue gas being discharged from the second boiler 7 can be entered chimney 9 by air-introduced machine 10.
The useless ash comprising calcium hydroxide for discharging ceramic catalytic reaction kettle 8 is provided on the calcium hydroxide circulation line
It is transmitted back to the conveying device of desulfurizing tower 3, the conveying device includes the first storehouse pump 11 or air compressor.
The ammonia reservoir 61 is connected with the ammonia pump 63 that ammonia is delivered to tempering tower 6, and the water reservoir 62 is connected with
Water is delivered to the water pump 64 of tempering tower 6.
A kind of processing method of desulfurizing industrial fume denitration dust collecting, includes the following steps:
The former flue gas of the kiln 1 of S1: greater than 500 DEG C enters the first boiler 2 by pipeline and carries out temperature adjustment, and temperature falls to 350-
400 DEG C enter desulfurizing tower gas inlet by the coconnected pipeline of outlet of the first boiler 2；
S2: the useless ash comprising calcium hydroxide inside desulfurizing tower 3 from the conveying of calcium hydroxide circulation line forms fluidized bed
Form, high-temperature flue gas and calcium hydroxide haptoreaction complete first time desulfurization process, and the flue gas after first time desulfurization passes through desulfurizing tower
Desulfurizing tower 3 is discharged in exhanst gas outlet；
S3: the flue gas being discharged from desulfurizing tower 3 enters whirlwind tower gas inlet through piping and enters inside whirlwind tower 4, flue gas
Calcium hydroxide after the dust of carrying, stickum, reaction precipitates herein realizes dedusting, and makes sulphur-containing substance in flue gas and disappear
Lime reaction realizes second of desulfurization, and whirlwind tower 4 is discharged by whirlwind tower exhanst gas outlet in the flue gas after dedusting；
S4: the flue gas being discharged from whirlwind tower 4 enters tempering tower 6 by pipeline, the pipe between whirlwind tower 4 and tempering tower 6
The feeding tower 5 of road setting delivers the fresh calcium hydroxide of 300-500 mesh according to the ratio that Ca:S is 2-5:1 to flue gas, and flue gas is herein
Segment pipe carries fresh calcium hydroxide and enters tempering tower gas inlet；
S5: flue gas is entered inside tempering tower 6 by tempering tower gas inlet, and water pump 64 pumps water from water reservoir 62
Enter temperature adjustment in tempering tower 6, ammonia pump 63 will be pumped into tempering tower 6 in ammonia ammonia reservoir 61 and be uniformly mixed with exhaust gas, fresh
Calcium hydroxide be sufficiently mixed react here with flue gas and complete third time desulfurization, and the quenched of flue gas is realized, in tempering tower 6
Temperature is reduced to 330-380 DEG C after interior completion temperature adjustment, and flue gas is discharged tempering tower 6 by tempering tower exhanst gas outlet and is entered by pipeline
The reaction kettle gas inlet 86 of ceramic catalytic reaction kettle 8；
S6: the exhaust air chamber 82 of ceramic catalytic reaction kettle 8 is entered by 86 flue gas of reaction kettle gas inlet, by ceramic mistake
The 4th desulphurization and denitration, dedusting are completed in absorption, filtering, the catalysis of filter 87, and purified flue gas enters ceramic filter 87
Inner cavity 872 is discharged into air-purifying chamber 81 by the filter outlet 871 of ceramic filter 87, this ceramics is discharged by net gas outlet 83 and urges
Change reaction kettle 8, the temperature of flue gas is 320-380 DEG C at this time after ceramic integrated unit；
S7: the flue gas being discharged from ceramic integrated unit, which enters the second boiler 7, to carry out UTILIZATION OF VESIDUAL HEAT IN and then passes through air-introduced machine
Clean flue gas is discharged through chimney 9 or is transmitted back to clean flue gas introducing flue gas recirculation pipeline again by air-introduced machine 10 by 10
Inside desulfurizing tower 3；
S8: the lower section of each ceramic catalytic reaction kettle 8 is provided with discharger 84, collects under ceramic integrated unit recoil
Useless ash comprising calcium hydroxide is transmitted back to desulfurizing tower 3 by calcium hydroxide circulation line.
A kind of industrial smoke high temperature desulfurizing denitration dust removal system, including UTILIZATION OF VESIDUAL HEAT IN unit, desulfurizing tower 3, whirlwind tower 4, tune
Matter unit, ceramic integrated unit, cycling element, wherein UTILIZATION OF VESIDUAL HEAT IN unit includes the first boiler 2, the second boiler 7.Original cigarette
Gas is discharged from kiln 1, and into the first boiler 2, second boiler 7 is connected with the chimney 9 that flue gas finally discharges, by second
It is discharged after secondary pre- recuperation of heat from chimney 9.It is set gradually between the first boiler 2 and the second boiler 7 according to the sequence of flow of flue gas
Have: desulfurizing tower 3, whirlwind tower 4, quenched unit, ceramic integrated unit, the cycling element include flue gas recirculation pipeline and disappear
Lime circulation line；
Wherein, the lower part of the desulfurizing tower 3 is provided with desulfurizing tower gas inlet, desulfurizing tower calcium hydroxide import, on desulfurizing tower 3
Portion is provided with desulfurizing tower exhanst gas outlet, and pipeline is communicated on the desulfurizing tower gas inlet, and the whirlwind tower 4 includes whirlwind tower 4
And the pipeline being connected with whirlwind tower 4；The quenched unit includes feeding tower 5, tempering tower 6, ammonia reservoir 61, water reservoir
62 and the pipeline that is connected with tempering tower 6；The ceramics integrated unit include the ceramic catalytic reaction kettle 8 of multiple parallel connections with
And the pipeline being connected with ceramic integrated unit；One end of the flue gas recirculation pipeline is arranged after air-introduced machine 10, another
The desulfurization fume entrance of desulfurizing tower 3 is arranged in end, so that flue gas is urged by desulfurizing tower 3, whirlwind tower 4, tempering tower 6, ceramics
The formation circulation of desulfurizing tower 3 is returned again after changing reaction kettle 8 and air-introduced machine 10；Drawing with setting one end of the calcium hydroxide circulation line
On pipeline between blower 10 and chimney 9, the other end is connected with desulfurizing tower 3.
Industrial original flue gas is discharged into pipeline from kiln 1, and 2 bypass pipe of the first boiler is provided on former smoke discharge pipe road
Road and valve, bypass line one end are connected between kiln 1 and the first boiler 2, and the other end is connected to the first boiler 2 and desulfurizing tower
Between 3, and it is provided with flue-gas temperature detection unit, bypass line valve can be passed through when the temperature of raw flue gas is greater than 400 DEG C
Opening size adjusts part or all of flue gas and enters the progress first time waste heat recycling of the first boiler 2, then passes through the first boiler 2
The coconnected pipeline of discharge outlet enters inside desulfurizing tower 3；When the temperature of raw flue gas is less than 400 DEG C, raw flue gas is directly logical
It crosses standard-sized sheet by-passing valve and enters desulfurizing tower 3.The gas inlet of first boiler 2 and outlet are designed with shut-off valve, and full pass shut-off valve can be right
The maintenance of first boiler 2 is without influencing whole system operation.
It is provided with desulfurizing tower calcium hydroxide import on desulfurizing tower 3, is connected to calcium hydroxide circulation line, calcium hydroxide circulation line
Other end setting pumps 11 for the useless ash comprising calcium hydroxide in ceramic integrated unit in ceramic integrated unit, by the first storehouse
It is transmitted back to inside desulfurizing tower 3.
Flue gas passes through the desulfurizing tower exhanst gas outlet of desulfurizing tower 3, into whirlwind tower 4.The top of whirlwind tower 4 is provided with whirlwind tower
Gas inlet, whirlwind tower exhanst gas outlet；Useless ash outlet is provided with below whirlwind tower 4.
Flue gas is discharged through whirlwind tower exhanst gas outlet, enters tempering tower 6 by pipeline.It is set between whirlwind tower 4 and tempering tower 6
It is equipped with feeding tower 5, brings fresh calcium hydroxide into pipeline between whirlwind tower 4 and tempering tower 6, the flue gas of flowing disappears fresh
Lime is brought into inside tempering tower 6.In lower part, tempering tower exhanst gas outlet is arranged upper for the tempering tower gas inlet setting of tempering tower 6
Portion, tempering tower 6 are internally provided with atomizer, and atomizer sprays water, the high settings such as in tempering tower 6.Have outside tempering tower 6
Ammonia reservoir 61, water reservoir 62, by ammonia pump 63, water pump 64, respectively by ammonia reservoir 61, water reservoir 62 ammonia and
Water is pumped into tempering tower 6, and water is quenched for cooling down, and ammonia is in back segment catalytic denitration.
Flue gas is discharged by the tempering tower exhanst gas outlet of tempering tower 6, and the ceramics of ceramic integrated unit are entered by pipeline
Catalytic reaction kettle 8.The ceramic catalytic reaction kettle 8 includes that shell and enclosure interior are mutually not attached to logical air-purifying chamber 81 and exhaust gas
Room 82 is provided with partition between the air-purifying chamber 81 and exhaust air chamber 82, multiple ceramic filters 87, institute are fixed at intervals on partition
Stating ceramic filter 87 is tubular structure closed at one end, and the open end is located in air-purifying chamber 81, and closed end is located at exhaust air chamber
In 82, the tube wall of the ceramic filter 87 is fibrous filter layer 873, and fibrous filter layer 873 is ceramic fibre, main component packet
Include Al2O3\SiO2, fibrous filter layer 873 with a thickness of 20mm, load has catalyst, the catalysis on fibrous filter layer 873
Agent is impregnated by nanometer to be combined on centrifugation technique load and fibrous filter layer 873.The reaction kettle flue gas of ceramic catalytic reaction kettle 8 into
The lower parts that ceramic catalytic reaction kettle 8 is arranged in mouth 86 are connected with exhaust air chamber 82, and net 83 setting of gas outlet is reacted in ceramic catalytic
The top of kettle 8 is connected with air-purifying chamber 81, and flue gas enters exhaust air chamber 82 and enters air-purifying chamber 81 after the filtering of ceramic filter 87
And it is discharged from net gas outlet 83.
Ceramic integrated unit has multiple ceramic catalytic reaction kettles 8 to be formed in parallel.Each ceramic catalytic reaction kettle 8 has multiple
Ceramic filter 87 is formed in parallel, and each ceramic catalytic reaction kettle 8 being capable of independent operating.It include being oppositely arranged on air-purifying chamber 81
Recoil mouth 88 and net gas outlet 83, interconnected each other by valve between each air-purifying chamber 81, Shuttoff Valve can be anti-to this
Answer kettle overhaul and other ceramic catalytic reaction kettles 8 work on, wherein the recoil mouth 88 on each reaction kettle air-purifying chamber 81 connects
Logical recoiling device, recoils to ceramic filter 87 included by this reaction kettle, other reaction kettle ceramic filters 87 are still
It can keep the work of desulphurization denitration dedusting.Multiple alternations of ceramic catalytic reaction kettle 8 have ensured that ceramic integrated unit can
Many years continuous work purified treatment flue gas.
Still up to 320-380 DEG C of the flue-gas temperature being discharged from ceramic integrated unit, flue gas is carried out into the second boiler 7
Second of UTILIZATION OF VESIDUAL HEAT IN after temperature reduces, introduces chimney 9 by air-introduced machine 10 and discharges, or enter flue gas recirculation pipeline, again
Into inside desulfurizing tower 3.Second boiler 7 is also equipped with bypass line and valve as the first boiler 2, closes 7 cigarette of the second boiler
Gas inlet and outlet valve, opening bypass line valve can make flue gas discharge to boiler maintenance, ensure entire gas cleaning system
System continuous operation.
The utility model patent can complete flue gas desulfurization, denitration, dedusting in 300 DEG C of front end or more, and change existing
There is technology to carry out the setting of desulfurization in low-temperature zone, NH can be reduced by carrying out desulfurization in leading portion4HSO4With acidic materials to middle section, after
The corrosiveness of Duan Guanlu.Temperature of the flue gas in entire purification system is always held at 350 DEG C or so, this is because 350
DEG C slaked lime desulfurizing effect is best, as shown in fig. 7, the desulfurization of flue gas is not affected by humidity at 330-370 DEG C, so
The temperature of whole system is controlled at 350 DEG C or so.
Containing SO in S material in original industrial smoke2It is relatively stable, and relatively active SO3With in system ammonia and water it is anti-
The NH with deep-etching effect should be generated4HSO4。NH4HSO4(1) equipment can be caused, which to block and corrode (2), causes catalyst to lose
It is living.It is maximum bottleneck in low-temp desulfurization.And SO3(1) aerosol itself can be caused to form plume (2) and form acidic materials corrosion
Pipeline and equipment (3) are that the precursor (3) of PM2.5 reduces boiler efficiency.The environment for keeping 350 DEG C in the present system, accelerates SO3's
Removing reduces NH4HSO4Generation, extend the service life of equipment.It is monitored by on-line monitoring equipment, desulfurizing tower 3, whirlwind tower 4
The SO of > 99% can be removed3。
SO3With NH3There is following reaction:
NH3+SO3+H2O=NH4HSO4(liquid)
2NH3+SO3+H2O=(NH4)2SO4(solid)
The reason of the escaping of ammonia includes: improper (2) flow of flue gas uneven distribution (3) low temperature of ratio of (1) ammonia Yu the substance containing N
(4) catalyst inactivation or catalyst reaction area are inadequate.320-400 DEG C of the reaction environment of this system and the pottery for invading profit catalyst
The high response area of porcelain filter screen nano size voids efficiently controls the escaping of ammonia, reduces NH4HSO4。
Inside desulfurizing tower 3, flue gas blows afloat the useless ash comprising calcium hydroxide, and useless ash both falls again by gravity and flows up and down shape
At fluidized bed.The fluidized bed bed that requires not collapse is formed inside desulfurizing tower 3 needs to keep the flow velocity and flow of certain flue gas, in order to
It ensures that exhaust gas volumn is stablized to need to attract the clean cigarette for having had reached discharge standard by flue gas recirculation pipeline after air-introduced machine 10
Gas recycling supplement.Need to maintain enough calcium hydroxides to reach desulfuration efficiency, calcium hydroxide circulation line is anti-by ceramic catalytic
It answers the useless ash comprising calcium hydroxide of 8 self-filtering of kettle to transport back desulfurizing tower 3, is the utilization in order to improve system calcium hydroxide with useless ash
Rate reduces cost.
Desulfurizing tower 3 is venturi fluidized beds empty tower structure, to Various Complex harmful exhaust and impurity in this desulfurizing tower 3
It carries out preliminary desulfurization depickling processing and first grade desulfurizing is realized to waste gas conditioning.Due to useless grey desulfurization so first grade desulfurizing is imitated herein
Rate is 50-70%.The main chemical reactions principle of Circulating Fluidized Bed Flue Gas Desulfurization Technology is as follows:
In the vertical Dual-Phrase Distribution of Gas olid system of nature, it can get at recirculating fluidized bed state (4~6m/s of gas velocity)
It is equivalent to the tens of gas-solid slip velocities to hundreds of times of individual particle slip velocity.Due to SO2Particle with calcium hydroxide is in recycle stream
Change the reaction process in bed, is that the chemical reaction process of external diffusion control is enhanced by slip velocity big between gas-solid
Mass transfer, rate of heat transfer and gas-solid mixing between gas-solid, to meet the condition requirement of sulfur dioxide and calcium hydroxide highly effective reaction.
Cause constantly to collide between particle by the fierce turbulence of particle, obtains the surface of calcium hydroxide constantly more
Newly and Desulphurization it is continuous recycled, to substantially increase the utilization rate of calcium hydroxide.
In recirculating fluidized bed, SO2With Ca (OH)2Reaction generate by-product CaSO3·1/2H2O, while and and SO3、HF
Corresponding by-product CaSO is generated with HCl reaction4·1/2H2O、CaF2、CaCl2Deng.Main chemical reactions equation is as follows:
Ca(OH)2+SO2=CaSO31/2H2O+1/2H2O
Ca(OH)2+SO3=CaSO4·1/2H2O+1/2H2O
CaSO3·1/2H2O+1/2O2=CaSO4·1/2H2O
Ca(OH)2+CO2=CaCO3+H2O
Ca(OH)2+ 2HCl=CaCl2·2H2O
2Ca(OH)2+ 2HCl=CaCl2·Ca(OH)2·2H2O
Ca(OH)2+ 2HF=CaF2+2H2O
In whirlwind tower 4, dust is carry into the flue gas in whirlwind tower 4, flue gas is downward, and because of centrifugal action,
Grain, dust encounter 4 inner wall of whirlwind tower, and particle, dust fall into bottom, from 4 bottom collection of whirlwind tower and are discharged into waste bin.In whirlwind
Inside tower 4, second of desulphurization reaction is carried out, while carrying out first time dedusting, and after the reaction of used first grade desulfurizing
The useless ash discharge in part, reduces the content of desulfurization product in systems, is conducive to the progress of desulphurization reaction, plays first quenched
Effect.Some stickums in systems also by most of discharge system, reduce the shadow to ceramic catalytic reaction kettle 8 herein
It rings.Secondary desulfuration efficiency is 30-50%.
Niter ash cellar is provided on feeding tower 5, the calcium hydroxide that granularity is narrower than 300-500 mesh in storehouse, which increases specific surface area, to be had
Conducive to quickening reaction.Internal system carries out 2-5 times of calcium sulfur ratio or more and sprays into fresh calcium hydroxide, it is ensured that the efficient of acidic components takes off
It removes, while substantially increasing the efficient utilization rate of adsorbent.
Ammonia inside tempering tower 6 is used to remove the substance containing N in flue gas, but denitration reaction needs catalyst, is adjusting
Ammonia and the ratio of the substance containing N are mainly adjusted inside matter tower 6 and are uniformly mixed, water primarily serves adjusting temperature, so that into
Flue gas is in optimum temperature range when next unit.Third level desulfurization and quenched is carried out before entering tempering tower 6 and in tower,
It mainly uses venturi principle, to flue gas, calcium hydroxide, atomization ammonia, is effectively mixed, it is ensured that extend and effectively connect
The time is touched, so that the acidic components improved effectively remove, and it is real to ensure that mixed uniformly flue gas enters ceramic catalytic reaction kettle 8
The efficient removal of existing multi-pollutant；Another function of tempering tower 6 is exactly event occur in the first Waste-heat boiler or desulfurizing tower 3
Hinder or safeguarded, implantation tempering tower 6 can carry out effective flue-gas temperature control to flue gas by sprayer unit, it is ensured that rear end
Lower than 400 DEG C safe operations of 8 catalytic denitration of ceramic catalytic reaction kettle reaction.Three-level desulfuration efficiency is 40-60%.
As shown in figure 5, after flue gas enters exhaust air chamber 82 from 8 gas inlet of ceramic catalytic reaction kettle, the calcium hydroxide meeting of carrying
Assemble the surface of ceramic filter 87, flue gas diffusion layer 875 surrounds ceramic filter 87, close to the surface of ceramic filter 87
When, because the surface of its fibrous filter layer 873 is the nano active factor, there is suction-operated, the surface to form calcium hydroxide can be adsorbed
Stack layer 874, and particle, calcium hydroxide are adsorbed on surface stack layer 874, play the role of dust removal by filtration and remove heavy metal, together
When sulfur-bearing S, hydrogen chloride HCl, react with calcium hydroxide when hydrogen fluoride HF gas passes through and play desulfurization deacidification, fiber
Load has catalyst on filter layer 873, has the function of that denitrification NOx, denitration, purified flue gas enter ceramic filter
The inner cavity 872 of device 87, and by filter outlet 871 enter air-purifying chamber 81 through air-purifying chamber 81 export discharge and it is in parallel with other
Ceramic integrated unit is discharged in the clean flue gas mixing that ceramic catalytic reaction kettle 8 is discharged.
The niter that recoil mouth 88 is used to be adsorbed on surface stack layer 874 is provided with above each ceramic catalytic reaction kettle 8
Into ash collecting box, unlatching discharger 84 is discharged ceramic catalytic reaction kettle 8 by waste residue outlet 85 and enters calcium hydroxide circulation for ash recoil
Pipeline.
The Base Material of ceramic filter 87 is ceramic fibre (Al2O3\SiO2), it is formed by centrifuging process.Ceramic filter
Device 87 is suitable for the gas cleaning of 200-1100 DEG C of temperature range, impregnates technology with nanometer and implements deeply to 87 tube body of ceramic filter
It spends SCR catalyst to impregnate deeply, being formed has high-effective dust-removing, desulfurization and NO_x Reduction by Effective in the ceramic catalytic filter of one, property
Can characteristic reaction mechanism be to containing nitride NOx and ammonium hydroxide NH3Flue gas be homogenized distribution, and penetrate nanometer scale ceramics mistake
Reduction reaction occurs for filtering layer and the high-efficiency activated factor direct collision of deep layer ceramic fibre surface SCR catalyst, has denitration efficiency
The features such as high low with the escaping of ammonia.
The principle of ceramic filter 87:
(1) dust in flue gas is removed by the tube surfaces of ceramic filter 87；
(2) slaked lime powder is used, SOx and acidic components are removed by the adsorption layer on ceramic pipe type filter.
SO2+Ca(OH)2=CaSO3+H2O
CaSO3+1/2O2=CaSO4
SO3+Ca(OH)2=CaSO4+H2O
2HCl+Ca(OH)2=CaCl2+2H2O
2HF+Ca(OH)2=CaF2+2H2O
(3) NH is used3Or urea realizes denitration as reducing agent when through the Catalytic Layer of 20mm, flue gas is passing through
Denitration reaction is carried out when the Catalytic Layer of 20mm, removal efficiency is high, and NH3 escapement ratio is low.
4NO+4NH3+O2=4N2+6H2O
2NO2+4NH3+O2=3N2+6H2O
The advantages of ceramic filter 87 includes:
(1) ceramic filter 87 can be in hot operation, the typical dedusting < 5mg/Nm of filtering material ontology3, ceramic filter
The validity of the desulfurization of component body superficial layer and other acidic components cooperation-removals；
(2) ceramic filter 87 including desulfurization, defluorinate, two is disliked in the high efficiency of high temperature catalytic denitration up to 95% or more
English and other acidic components efficient removals etc.；
Flue gas index after ceramic catalytic reaction kettle 8 is as follows:
Dirt < 5mg/Nm3；
Nitride NOx removal rate > 97%；
Sulfide SOx removal efficiency > 95%；
Acidic components HF, HCl, SO3And other acidic components removal efficiencies > 95%；
Dioxin removal efficiency is greater than 99%.
Discharge flue gas alkali metal content excessively high the defects of easily causing catalyst poisoning.Ceramic filter disclosed by the utility model
Device 87 accumulates desulphurization and denitration, defluorinate, dust removal integrated control technology, feature show system multi-pollutant cooperation-removal rate it is high,
Operating cost is low and the advantages such as long service life, can be applied to boiler, waste incineration, ceramics, cement glass and other industry kilns
Kiln gas purification techniques etc..Ceramic filter 87 uses wide in range 200-380 DEG C of Acclimation temperature range, and how dirty 330-380 DEG C of section be
Contaminate object efficient removal；The national following environmental protection standard is promoted adaptable, it can be achieved that kiln gas multi-pollutant minimum discharge；Pottery
Porcelain catalyst tubular type screen pipe cost performance with higher, service life are even up to 10 years or more, are had high-effective dust-removing, are taken off
Sulphur, denitration and other acidic components are in the technical advantage of one；System footprint area is small, operational reliability is high, it is lower to have
Operating cost.
One of structure of desulfurizing tower 3 assists smoke inlet pipe road as shown in fig. 6, being arranged outside desulfurizing tower 3, described
Auxiliary smoke inlet pipe road is connected with flue gas recirculation pipeline, and auxiliary smoke inlet pipe road includes being arranged on supervisor 31 and supervisor 31
Multiple branch pipes 32, the supervisor 31 is arranged around desulfurizing tower 3, and one end of each branch pipe 32 is connected with being responsible for 31, the other end
It is extended to inside desulfurizing tower 3 for branch pipe gas inlet 321, the multiple branch pipe gas inlet 321 tilts upward setting.Assist cigarette
Be provided with air pressure pump in gas air inlet pipe, accelerate flue gas and spray into speed to form jet stream, jet strengthened calcium hydroxide and flue gas it is opposite
Sliding friction speed improves the desulfurization deacidification efficiency of fluidized bed.
The system of the utility model can purify sulfur content in 2000-8000mg/m3Between industrial smoke, by desulfurization
The first desulfurization of tower 3,4 secondary desulfuration of whirlwind tower, 8 four desulfurization, ceramic catalytic reaction kettle desulfurization three times in tempering tower 6, desulfurization effect
Fruit is obvious, and whole system keeps high temperature at 350 DEG C or so, is conducive to react containing S material with calcium hydroxide, accelerates desulfurization effect.It follows
Ring clean flue gas supplement holding system exhaust gas volumn stabilization prevents the bed that collapses.Calcium hydroxide circulation line recycles calcium hydroxide, subtracts
The investment of few calcium hydroxide, which improves utilization efficiency, reduces desulphurization cost.The high temperature desulfurizing depickling of this system front end, reduce acidic materials and
NH4HSO4 centering, back segment pipeline, equipment corrosiveness, improve the service life of whole system.Middle section dedusting, absorption viscosity
Substance, acidic materials, the blocking that poisons for reducing the ceramic catalytic reaction kettle 8 that back segment is arranged influence, further increase ceramics and urge
Change the catalytic effect of reaction kettle 8, NO_x Reduction by Effective reduces the escaping of ammonia, reduces NH4HSO4.Ceramic catalytic reaction kettle 8 passes through fiber
The long-pending desulphurization and denitration of the filtering and catalytic action of filter layer 873, dedusting further increase the catharsis of this system in one.This
The waste heat that the UTILIZATION OF VESIDUAL HEAT IN unit of system can make full use of industrial smoke can also play adjustment effect to the reaction temperature of system.
The 8 parallel configuration independent operating of ceramic catalytic reaction kettle of the waste heat boiler bypass line of this system and ceramic integrated unit is protected
System 10 years or more continuous operations are hindered.
System disclosed by the utility model greatly reduces the discharge of dust, pernicious gas as an organic whole, real
The effect of high temperature desulfurizing is showed, so that the fume indication of discharge is far superior to national standard.
Finally, it is stated that above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng
The utility model is described in detail according to preferred embodiment, those skilled in the art should understand that, it can be to this
The technical solution of utility model is modified or replaced equivalently, without departing from the objective and model of technical solutions of the utility model
It encloses, should all cover in the scope of the claims of the utility model.
Claims (6)
1. a kind of industrial smoke high temperature desulfurizing denitration dust removal system, including UTILIZATION OF VESIDUAL HEAT IN unit, for attracting drawing for smoke movement
Blower (10) and the chimney (9) being connected with air-introduced machine (10) for discharging clean flue gas, the UTILIZATION OF VESIDUAL HEAT IN unit include
First boiler (2), the second boiler (7), it is characterised in that: further include by the sequentially connected desulfurizing tower of pipeline (3), whirlwind tower
(4), quenched unit, ceramic integrated unit；
Wherein, the quenched unit includes feeding tower (5), tempering tower (6), ammonia reservoir (61), water reservoir (62)；The pottery
Porcelain integrated unit includes the ceramic catalytic reaction kettle (8) of multiple parallel connections；
The flue gas emission mouth of first boiler (2) passes through the desulfurizing tower gas inlet phase that pipeline is arranged with desulfurizing tower (3) lower part
Even；The whirlwind tower gas inlet that desulfurizing tower exhanst gas outlet on desulfurizing tower (3) top passes through pipeline and whirlwind tower (4) top is set
It is connected；Be arranged whirlwind tower (4) top whirlwind tower exhanst gas outlet and setting tempering tower (6) lower part tempering tower gas inlet
It is connected by pipeline, is provided with the feeding tower for launching fresh calcium hydroxide on the pipeline between whirlwind tower (4) and tempering tower (6)
(5)；The tempering tower exhanst gas outlet of the top setting of the tempering tower (6) is connected with ceramic integrated unit by pipeline, is made pottery
Porcelain integrated unit is connected by pipeline with the second boiler (7), and the second boiler (7) exhanst gas outlet is communicated with air-introduced machine
(10)；
System further includes cycling element, and the cycling element includes flue gas recirculation pipeline and calcium hydroxide circulation line, the cigarette
On the pipeline that gas circulation line one end is arranged between air-introduced machine (10) and chimney (9), the other end is connected on desulfurizing tower (3),
The calcium hydroxide circulation line is arranged between ceramic catalytic reaction kettle (8) and desulfurizing tower (3).
2. a kind of industrial smoke high temperature desulfurizing denitration dust removal system according to claim 1, it is characterised in that: the ceramics
The upper one end of catalytic reaction kettle (8) is provided with recoil mouth (88), and opposite one end is provided with net gas and exports with recoil mouth (88)
(83), the lower part of ceramic catalytic reaction kettle (8) is provided with reaction kettle gas inlet (86), the lower end of ceramic catalytic reaction kettle (8)
It is provided with waste residue outlet (85), is provided with discharger (84) on the waste residue outlet (85), ceramic catalytic reaction kettle (8) inner part
For exhaust air chamber (82) and the air-purifying chamber (81) being located above exhaust air chamber (82), the exhaust air chamber (82) and air-purifying chamber (81) every
Absolutely, reaction kettle gas inlet (86) is connected to exhaust air chamber (82), the air-purifying chamber (81) and recoil mouth (88), net gas outlet (83)
Connection, the ceramic catalytic reaction kettle (8) are internally provided with the more ceramic filters (87) for desulphurization and denitration, dedusting.
3. a kind of industrial smoke high temperature desulfurizing denitration dust removal system according to claim 2, it is characterised in that: described more
The structure of ceramic filter (87) tubulose all the same that another end opening is closed in one end, is there is the fiber filter of catalyst by load
Layer (873) wraps up.
4. a kind of industrial smoke high temperature desulfurizing denitration dust removal system according to claim 1, it is characterised in that: described second
Boiler (7) is connected to by pipeline with chimney (9), and air-introduced machine (10) is arranged between the second boiler (7) and chimney (9), air inducing
The flue gas being discharged from the second boiler (7) can be entered chimney (9) by machine (10).
5. a kind of industrial smoke high temperature desulfurizing denitration dust removal system according to claim 4, it is characterised in that: the niter
It is provided with the useless ash comprising calcium hydroxide for discharging ceramic catalytic reaction kettle (8) on grey circulation line and is transmitted back to desulfurizing tower
(3) conveying device, the conveying device include the first storehouse pump (11) or air compressor.
6. a kind of industrial smoke high temperature desulfurizing denitration dust removal system according to claim 1, it is characterised in that: the ammonia storage
Storage (61) is connected with the ammonia pump (63) that ammonia is delivered to tempering tower (6), and the water reservoir (62), which is connected with, conveys water
To the water pump (64) of tempering tower (6).
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| CN201920153280.8U CN209714765U (en) | 2019-01-29 | 2019-01-29 | A kind of industrial smoke high temperature desulfurizing denitration dust removal system |
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| CN201920153280.8U CN209714765U (en) | 2019-01-29 | 2019-01-29 | A kind of industrial smoke high temperature desulfurizing denitration dust removal system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109603539A (en) * | 2019-01-29 | 2019-04-12 | 张红卫 | A kind of industrial smoke high temperature desulfurizing denitration dust removal system and its processing method |
| CN111249881A (en) * | 2020-02-25 | 2020-06-09 | 四川美富特环境治理有限责任公司 | Glass kiln flue gas treatment method and system |
| CN111659242A (en) * | 2020-06-24 | 2020-09-15 | 山西焦煤集团有限责任公司 | Coke oven flue gas desulfurization, denitrification and dust removal system and method with exhaust gas circulation |
-
2019
- 2019-01-29 CN CN201920153280.8U patent/CN209714765U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109603539A (en) * | 2019-01-29 | 2019-04-12 | 张红卫 | A kind of industrial smoke high temperature desulfurizing denitration dust removal system and its processing method |
| CN111249881A (en) * | 2020-02-25 | 2020-06-09 | 四川美富特环境治理有限责任公司 | Glass kiln flue gas treatment method and system |
| CN111659242A (en) * | 2020-06-24 | 2020-09-15 | 山西焦煤集团有限责任公司 | Coke oven flue gas desulfurization, denitrification and dust removal system and method with exhaust gas circulation |
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