CN106334426A - Ammonia method flue gas dedusting-desulphurization-denitration integrated purification system and method - Google Patents
Ammonia method flue gas dedusting-desulphurization-denitration integrated purification system and method Download PDFInfo
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- CN106334426A CN106334426A CN201510408994.5A CN201510408994A CN106334426A CN 106334426 A CN106334426 A CN 106334426A CN 201510408994 A CN201510408994 A CN 201510408994A CN 106334426 A CN106334426 A CN 106334426A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses an ammonia method flue gas dedusting-desulphurization-denitration integrated purification system and method. The purification system comprises a flue gas introducing device (1), an ozone supplying device (2), a flue gas washing tower device (3), a solid dust removal device (4), a fertilizer preparation device (5) and a flue gas discharge device (6). The purification method comprises ozone treatment, flue gas washing and fertilizer preparation. The ammonia method flue gas dedusting-desulphurization-denitration integrated purification system and method realize direct ammonia method flue gas dedusting and desulphurization cleaning treatment on untreated flue gas, transform a sulfur oxide and a nitric oxide in flue gas into ammonium sulfate-ammonium nitrate mixed fertilizer and prevent sewage discharge.
Description
Technical field
The present invention relates to a kind of ammonia flue gas dust-removal and desulfurizing denitrification integral cleaning system and its method, specifically
Ground, relates to directly carry out the flue gas without any process ammonia flue gas dust-removal and desulfurizing denitration energy
Reach the flue gas purification system simultaneously preparing ammonium sulfate and ammonium nitrate mixed fertilizer and method.
Background technology
Industrialization, while strong propulsion economic development, causes and can not keep away also to air and ecological environment
The pollution problem exempted from.Wherein, from the oxysulfide of thermoelectricity, smelting iron and steel and petroleum refining industry
(sox), nitrogen oxides (nox) and the discharge of dust granules thing are also cause atmospheric pollution mainly former
Therefore one, with country, more stringent requirement is prevented and treated to atmosphere and water pollution, flue gas pollutant " is become
Waste be changed into values " resource reclaim while avoid as far as possible secondary pollution by be flue gas cleaningization process one have
The solution of competitiveness.
At present, domestic flue-gas dust-removing and desulfurization denitration mainly has two kinds of mainstream technology schemes, and one kind is that ammonia selects
Property catalytic reduction method (scr) denitration+soda washing desulphurization technology;Another kind is washed for ozone oxidation+soda
Wash combined desulfurization and denitration technology.
Wherein, in ammine selectivity catalytic reduction method (scr) denitration+soda washing desulphurization technology, denitration
Part adopts scr denitration reaction unit, sprays into nox in ammonia and flue gas in the presence of catalyst
There is reduction reaction, generate n2And h2O, afterwards flue gas enter back into carry out in desulfurization washing tower soda with
The neutralization reaction of sox, generates sodium sulfate saline sewage, processes through sewage chemical oxygen demand (cod) and closes
It is emitted into sea after lattice.The main deficiency of this technology is: 1) non-integral technology, i.e. desulfurization and denitration
Process is carried out respectively in two autonomous systems, and plant area and investment are all larger.2) sulfur acid sodium is dirty
Water drains into sea outside needing, unfavorable to the smoke eliminator sewage discharge being in inland.
In ozone oxidation+soda washing combined desulfurization and denitration technology, initially with ozone by the no in flue gas
Be oxidized to high-valence state nitrogen oxides soluble in water, afterwards contain sox and nox flue gas together enter de-
Sulfur denitration scrubbing tower, occurs acid-base neutralization reaction to generate sodium sulfate and sodium nitrate saline sewage, warp with soda
It is emitted into sea after sewage cod process is qualified.The major defect of this technology is: 1) with country to water
The increasingly harsh requirement of source pollution, there is presently no the nitrate anion in the technical finesse saline sewage of maturation
Ion.2) problem common with abandoning method fume treatment technology is to the smoke eliminator being in inland
Sewage discharge is unfavorable.
In a word, the common problem of two kinds of main flow desulphurization denitration technology is: 1) not to the pollution in flue gas
Thing (sox and nox) is using the resource recovery scheme turned waste into wealth;2) row of sewage can all be produced
Put problem, restrictive condition is produced to inland gas cleaning, exists simultaneously and environment is caused with the hidden of secondary pollution
Suffer from.
Content of the invention
It is an object of the invention to provide a kind of ammonia process that the flue gas without any process directly can be carried out takes off
Sulfur denitration purified treatment, the sulfur and nitrogen oxides in flue gas are converted into ammonium sulfate and nitric acid simultaneously
The ammonia flue gas dust-removal and desulfurizing denitrification integral cleaning system of ammonium mixed fertilizer and not externally discharged waste water and its side
Method.
To achieve these goals, the present invention provides a kind of ammonia flue gas dust-removal and desulfurizing denitrification integral to purify
System, wherein, this cleaning system includes pollution discharge, ozone supply means, flue gas washing tower dress
Put, solid dust removing means, chemical fertilizer preparation facilitiess and flue gas discharger, described ozone supply
Device is connected with described pollution discharge, for the ozone mixing that will produce in described ozone supply means
In flue gas stream in described pollution discharge, described pollution discharge is filled with described flue gas washing tower
Put middle part to be connected, for importing in described flue gas washing tower apparatus the flue gas being mixed with ozone, in institute
The tower body top stating flue gas washing tower apparatus is provided with condensate water recovery device, described flue gas discharger with
Described flue gas washing tower apparatus top is connected, for the flue gas after washing is discharged, described flue gas washing tower
Bottom of device is connected with described solid dust removing means entrance, described solid dust removing means outlet point
It is not connected with described flue gas washing tower apparatus top and described chemical fertilizer preparation facilitiess.
Preferably, the ammonia flue gas dust-removal and desulfurizing denitrification integral cleaning system according to the present invention, wherein,
Described pollution discharge includes flue gas import pipe and is arranged on the flue gas fall in flue gas import pipe
Warm device.Described flue gas cool-down device is used for the flue gas stream in flue gas import pipe is lowered the temperature.
Preferably, the ammonia flue gas dust-removal and desulfurizing denitrification integral cleaning system according to the present invention, wherein,
Described ozone supply means include ozonator and ozone distributor.
Preferably, the ammonia flue gas dust-removal and desulfurizing denitrification integral cleaning system according to the present invention, wherein,
In addition to condensate water recovery device, described flue gas washing tower apparatus (3) also include returning positioned at condensed water
Flue gas cool-down layer below receiving apparatus and tower bottom liquid circulated sprinkling layer.
Preferably, the ammonia flue gas dust-removal and desulfurizing denitrification integral cleaning system according to the present invention, wherein,
Described solid dust removing means is connected with the tower bottom liquid circulated sprinkling layer of described flue gas washing tower apparatus.
A kind of ammonia flue gas dust-removal and desulfurizing denitrification integral purification method is it is characterised in that this purification method
Including following operation:
Ozone treatment process is it would be desirable to the flue gas purifying directly and ozone contact, makes the nitrogen oxidation in flue gas
Thing aoxidizes;
Flue gas washing operation: in the presence of oxygen, by the flue gas after ozone is processed with contain ammonia
Serosity counter current contacting, carry out flue gas washing;And,
Chemical fertilizer preparation section: after the solid dust removing in the solution after flue gas washing, a part of solution
It is back in flue gas washing operation and uses as the serosity containing ammonia, a part of condensing crystallizing simultaneously is dried
Prepare chemical fertilizer.
Preferably, the ammonia flue gas dust-removal and desulfurizing denitrification integral purification method according to the present invention, wherein,
This purification method also included the first flue gas cool-down treatment process before ozone treatment process, by the temperature of flue gas
Degree controls at 100-150 DEG C.
Preferably, the ammonia flue gas dust-removal and desulfurizing denitrification integral purification method according to the present invention, wherein,
In flue gas washing operation, after flue gas and the serosity counter current contacting containing ammonia, carry out the second cigarette further
Gas cooling is processed.
Preferably, the ammonia flue gas dust-removal and desulfurizing denitrification integral purification method according to the present invention, wherein,
In chemical fertilizer preparation section, after solid dust removing, be back to solution in flue gas washing operation and
The flow-rate ratio of the solution for preparing chemical fertilizer is 200:1-500:1, more preferably 250:1-450:1.
Preferably, the ammonia flue gas dust-removal and desulfurizing denitrification integral purification method according to the present invention, wherein,
Flow-rate ratio for the serosity contacting with flue gas adverse current and the water processing for the second flue gas cool-down is 50:
1-200:1, more preferably 80:1-180:1.
By technique scheme, the ammonia flue gas dust-removal and desulfurizing denitrification integral cleaning system of the present invention is led to
Cross using solid dust removing means by with smoke contacts after serosity in dust removing, it is right to be capable of
Flue gas without any process directly carries out ammonia process of desulfurization denitration purified treatment, passes through to remove dust simultaneously
Serosity afterwards sends into chemical fertilizer preparation facilitiess, the sulfur and nitrogen oxides in flue gas can be converted into sulfur
Sour ammonium and ammonium nitrate mixed fertilizer.Advantage is as follows:
1) sulfur and nitrogen oxides in flue gas can be converted into ammonium sulfate and ammonium nitrate hybridization
Fertilizer, in the case of reaching pollutant resourcesization recovery, can also create certain economic worth.
2) adopt the art of this patent scheme, any undressed flue gas can be processed, save flue gas
The investment of pre-processing device (as electric cleaner etc.) and construction floor space.
3) adopt the art of this patent scheme, can be by controlling the serosity contacting with flue gas adverse current and being used for
The flow-rate ratio of the water that the second flue gas cool-down is processed, reaches effective control bottom of towe liquid level, thus realizing device not
The target of externally discharged waste water, effectively prevent the secondary pollution problem of sewage.
4) pass through to arrange condensate water recovery device, can vapor resource to carry in efficient recovery flue gas, reduce device
Water consumption, also can solve the free-and-easy problem of droplet in process of wet desulphurization simultaneously.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, with
Detailed description below is used for explaining the present invention together, but is not construed as limiting the invention.?
In accompanying drawing:
Fig. 1 is the schematic flow sheet of the ammonia flue gas dust-removal and desulfurizing denitrification integral cleaning system of the present invention.
Description of reference numerals
1 pollution discharge, 2 ozone supply means, 3 flue gas washing tower apparatus, 4 solids
Dust removing means, 5 chemical fertilizer preparation facilitiess, 6 flue gas dischargers, 7 condensing hot air furnace
Device, 11 non-purified flue gases, 12 temperature lowering waters, 13 ammonia feed mouths, 14 oxidation airs feed mouths,
15 bottom of towe circulation slurry pumps, 16 tower bottom liquid circulated sprinkling layers, 17 solid dust filter cakes, 18 sulfur
The mixed fertilizer of sour ammonium and ammonium nitrate, 19 condensed waters, 20 tail gas, 21 reclaim condensates, 22
Condensate layer, 23 condensated water recovering pumps
Specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.It should be appreciated that
Specific embodiment described herein is merely to illustrate and explains the present invention, is not limited to the present invention.
Fig. 1 is the schematic flow sheet of the ammonia flue gas dust-removal and desulfurizing denitrification integral cleaning system of the present invention.
As shown in figure 1, the ammonia flue gas dust-removal and desulfurizing denitrification integral cleaning system that the present invention provides, wherein,
This cleaning system include pollution discharge (1), ozone supply means (2), flue gas washing tower apparatus (3),
Solid dust removing means (4), chemical fertilizer preparation facilitiess (5) and flue gas discharger (6), described
Ozone supply means (2) are connected with described pollution discharge (1), for filling described ozone supply
Put the ozone producing in (2) to be mixed in the flue gas stream in described pollution discharge (1), described cigarette
Gas gatherer (1) is connected with the middle part of described flue gas washing tower apparatus (3), for being mixed with ozone
Flue gas import in described flue gas washing tower apparatus (3), in described flue gas washing tower apparatus (3)
Tower body top is provided with condensate water recovery device (7), described flue gas discharger (6) and described flue gas
Washing tower device (3) top is connected, for the flue gas after washing is discharged, described flue gas washing tower dress
Put (3) bottom to be connected with described solid dust removing means (4) entrance, described solid dust removing dress
Put (4) outlet respectively with described flue gas washing tower apparatus (3) top and described chemical fertilizer preparation facilitiess (5)
It is connected.
The described solid dust of serosity being obtained after making washing flue gas in flue gas washing tower apparatus (3)
Removing means (4) carries out solid dust removing, is then respectively delivered to flue gas washing tower apparatus (3) again
In described chemical fertilizer preparation facilitiess (5), be capable of by without any process, especially without
The non-purified flue gas (11) of pre- dust removal process directly carries out ammonia process of desulfurization denitration purified treatment, can avoid
As the setting of the main equipments such as dust arrester, the space requirement of cleaning system can be substantially reduced, pass through simultaneously
Serosity after removing dust is sent into chemical fertilizer preparation facilitiess, can be by the oxysulfide in flue gas and nitrogen oxidation
Thing is converted into ammonium sulfate and ammonium nitrate mixed fertilizer, realizes pollutant and turn waste into wealth carrying out resource recovery
Effect.
In addition, described condensate water recovery device can be by the annular container being provided with anti-pouring top cover and top
Cooling layer is constituted, and carries out cooling down by condensate layer (22) water spray to the flue gas after purifying, generation
Condensate flows in annular container, recycles condensate transfer pump (23) will reclaim condensate (21)
Extract out.Can further by entrained water vapor condensation in flue gas simultaneously by arranging condensate water recovery device
Carry out reclaiming and be used for desulphurization denitration water.
According to the ammonia flue gas dust-removal and desulfurizing denitrification integral cleaning system of the present invention, wherein, described flue gas
Gatherer (1) includes flue gas import pipe and is arranged on the flue gas cool-down device in flue gas import pipe.
Described flue gas cool-down device generally can flue gas is lowered the temperature by the way of spraying temperature lowering water (12).
By arranging flue gas cool-down device in flue gas import pipe, the temperature of flue gas can be effectively controlled
100-150 DEG C, and then it is able to ensure that nitrogen oxides in flue gas fully by from ozone supply means (2)
Ozone oxidation.
According to the ammonia flue gas dust-removal and desulfurizing denitrification integral cleaning system of the present invention, wherein, described ozone
Feedway (2) includes ozonator and ozone distributor.Ozone is produced simultaneously by ozonator
Equably ozone is distributed in described pollution discharge (1) by ozone distributor, by flue gas
Nitrogen oxides.
According to the ammonia flue gas dust-removal and desulfurizing denitrification integral cleaning system of the present invention, wherein, except condensation
Beyond apparatus for recovering (7), described flue gas washing tower apparatus (3) also include filling positioned at condensing hot air furnace
Put the flue gas cool-down layer below (7) and tower bottom liquid circulated sprinkling layer (16).Flue gas enters in the middle part of tower body
After tower body, with the tower bottom liquid counter current contacting containing ammonia being sprayed by tower bottom liquid circulated sprinkling layer (16)
Afterwards, further by the flue gas cool-down layer positioned at tower body top, after making flue gas cool-down, pass through cold further
Solidifying apparatus for recovering reclaims through entrained water vapor condensation in flue gas, and flue gas discharges dress eventually through flue gas
Put (6) to discharge.
Described flue gas cool-down layer generally can come flue gas is lowered the temperature in the way of using spray water, the present invention
In by the flow to tower bottom liquid in spray flow in flue gas cool-down layer and tower bottom liquid circulated sprinkling layer (16)
It is controlled, the vapor drag-out carrying in flue gas can be controlled it is ensured that bottom of towe level stability, realize
The not purpose of externally discharged waste water.
Further, described flue gas washing tower apparatus (3) can also arrange ammonia on tower body further and mend
To mouth (13) and oxidation air supply mouth (14), for feeding ammonia and the oxygen of continuous consumption.Really
The flue gas protected in flue gas washing tower apparatus (3) fully carries out desulphurization denitration.
According to the ammonia flue gas dust-removal and desulfurizing denitrification integral cleaning system of the present invention, wherein, described solid
Dust removing means (4) and tower bottom liquid circulated sprinkling layer (16) of described flue gas washing tower apparatus (3)
It is connected.Tower bottom liquid enters solid dust removing means after bottom of towe circulation slurry pump (15) extracts boosting out
(4), after solid dust removing, a part of tower bottom liquid is back to tower bottom liquid circulated sprinkling layer (16),
A part is supplied to chemical fertilizer preparation facilitiess (5) and is used for preparing chemical fertilizer, and solid dust is with solid dust filter cake
(17) form is separated.
Described solid dust removing means (4) can be filtered using commonly used utilization in this area
Or centrifugation principle removes the equipment of contained solid dust in serosity, for example can be using metal sintering filter
Core defecator or the solid centrifugation cyclone separator of liquid.
Described chemical fertilizer preparation facilitiess (5) can be using conventional use of single-action or multiple-effect vacuum in this area
Evaporation crystallization equipment, the serosity after removing solid dust is sent into crystallizer and is evaporated crystallizing, obtain
Slip obtains ammonium sulfate and ammonium nitrate mixed fertilizer (18) through settlement separate, centrifugation and after being dried again.
The condensed water (condensed water) producing in chemical fertilizer preparation process can be back to flue gas washing tower apparatus (3) again
In reuse.
The ammonia flue gas dust-removal and desulfurizing denitrification integral purification method being provided according to the present invention, wherein, this is net
Change method includes following operation:
Ozone treatment process is it would be desirable to the flue gas purifying directly and ozone contact, makes the nitrogen oxidation in flue gas
Thing aoxidizes;
Flue gas washing operation: in the presence of oxygen, by the flue gas after ozone is processed with contain ammonia
Serosity counter current contacting, carry out flue gas washing;And,
Chemical fertilizer preparation section: after the solid dust removing in the solution after flue gas washing, a part of solution
It is back in flue gas washing operation and uses as the serosity containing ammonia, a part of condensing crystallizing simultaneously is dried
Prepare chemical fertilizer;
Wherein, in flue gas washing operation, also include the operation to flue gas condensing Water Sproading.
According to the ammonia flue gas dust-removal and desulfurizing denitrification integral purification method of the present invention, by flue gas washing,
Ammonia occurs acid-base neutralization reaction to generate ammonium sulfate and nitric acid with the sulfur and nitrogen oxides in flue gas
Ammonium, is together entered in bottom of towe serosity with the solid dust washing.Solution after flue gas washing is (i.e.
Tower bottom liquid) in solid dust removing, be then respectively delivered to flue gas washing tower apparatus (3) and institute again
State in chemical fertilizer preparation facilitiess (5), be capable of without any process, especially without removing in advance
The flue gas that dirt is processed directly carries out ammonia process of desulfurization denitration purified treatment, can avoid as large-scale in dust arrester etc.
The setting of equipment, can be substantially reduced the space requirement of cleaning system, simultaneously by removing the slurry after dust
Liquid send into chemical fertilizer preparation facilitiess, can by the sulfur and nitrogen oxides in flue gas be converted into ammonium sulfate and
Ammonium nitrate mixed fertilizer, realizes pollutant and turns waste into wealth carrying out the effect of resource recovery.
In addition, by reclaiming to flue gas condensing water, can further entrained water in flue gas be steamed
Air cooling coalescence carries out reclaiming for desulphurization denitration water.
According to the ammonia flue gas dust-removal and desulfurizing denitrification integral purification method of the present invention, wherein, this purification side
Method also included the first flue gas cool-down treatment process before ozone treatment process, and the temperature control of flue gas is existed
100-150℃.Cooling processes generally can come flue gas is lowered the temperature in the way of using spray water, passes through
The temperature of flue gas is effectively controlled 100-150 DEG C it can be ensured that the nitrogen oxides in flue gas are fully come
Ozone oxidation from ozone supply means (2).
According to the ammonia flue gas dust-removal and desulfurizing denitrification integral purification method of the present invention, wherein, wash in flue gas
Wash in operation, after flue gas and the serosity counter current contacting containing ammonia, carry out further at the second flue gas cool-down
Reason.Described second flue gas cool-down processes generally can come flue gas is lowered the temperature in the way of using spray water.
By the second flue gas cool-down process is carried out to flue gas in the present invention, the vapor carrying in flue gas can be controlled
Drag-out, it is ensured that bottom of towe level stability, realizes the purpose of not externally discharged waste water.
According to the ammonia flue gas dust-removal and desulfurizing denitrification integral purification method of the present invention, wherein, wash in flue gas
Wash in operation, can further include ammonia supply operation and oxidation air supply operation, for feeding
The ammonia constantly consuming during flue gas washing and oxygen.Guarantee that the flue gas in flue gas washing operation fully enters
Row desulphurization denitration.
According to the ammonia flue gas dust-removal and desulfurizing denitrification integral purification method of the present invention, wherein, in chemical fertilizer system
In standby operation, after solid dust removing, the solution that is back in flue gas washing operation and be used for preparing
The flow-rate ratio of the solution of chemical fertilizer is 200:1-500:1, preferably 250:1-450:1.By flowing back
The volume ratio of the solution in flue gas washing operation and the solution for preparing chemical fertilizer controls in above range
Interior it can be ensured that the tower bottom liquid containing ammonia of abundance is back in flue gas washing operation, simultaneously can be true
Protect the product such as produced ammonium sulfate and ammonium nitrate in flue gas washing operation and be effectively supplied to chemical fertilizer preparation
During.
According to the ammonia flue gas dust-removal and desulfurizing denitrification integral purification method of the present invention, wherein, for cigarette
The serosity of gas counter current contacting is 50:1-200:1 with the flow-rate ratio of the water processing for the second flue gas cool-down,
It is preferably 80:1-180:1.Pass through the supply speed of the serosity being used for contacting with flue gas adverse current in the present invention
Degree controls within the above range with the ratio of the water feed speed processing for the second flue gas cool-down, can be effective
Carry out the second flue gas cool-down process, and the vapor drag-out carrying in flue gas can be controlled it is ensured that bottom of towe
Level stability, realizes the purpose of not externally discharged waste water.
Embodiment
Below by enumerating embodiment, system is purified to the ammonia flue gas dust-removal and desulfurizing denitrification integral of the present invention
System and its method are further described.But the present invention and be defined in set forth below for embodiment.
Embodiment 1
Future catalytic cracking waste heat boiler flue gas (flue gas flow: 300000nm3/ h) it is introduced directly into
Pollution discharge (1), carries out spray cooling to 130 DEG C in pollution discharge (1) to flue gas,
The ozone that ozone supply means (2) produce again is evenly injected in the flue of pollution discharge (1),
Nitrogen oxides in flue gas are high-valence state nitrogen oxides, enter flue gas washing tower apparatus (3) afterwards,
Sulfur oxygen during the tower bottom liquid counter current contacting with tower bottom liquid circulated sprinkling layer (16) for the flue gas, in flue gas
There is acid-base neutralization reaction, the ammonium sulfate of generation and nitre with the weak ammonia in tower bottom liquid in compound and nitrogen oxides
Sour ammonium mixture enters in bottom of towe tower bottom liquid, and the flue gas after washing, purifying passes through flue gas further
The shower water cooling of cooling layer, passing through condensation water condensing unit further will be cold for the vapor carrying in flue gas
After solidifying recovery, directly it is emitted into air through flue gas discharger (6).Liquid containing ammonium sulfate and the tower of ammonium nitrate
Bottom tower bottom liquid enters solid dust removing means (4) after bottom of towe extraction, after a small amount of solid dust is fallen in removing
A tower bottom liquid part be recycled to tower bottom liquid circulated sprinkling layer (16) of flue gas washing tower apparatus (3),
Another part enters in chemical fertilizer preparation facilitiess (5), and through concentrating, crystallizing, dry run is prepared
Solid, powdery ammonium sulfate and ammonium nitrate mixed fertilizer.The condensate reclaiming during evaporative condenser can conduct
Cooling water again returns in flue gas washing tower apparatus (3).It is recycled to flue gas washing tower apparatus (3)
The tower bottom liquid of tower bottom liquid circulated sprinkling layer (16) and be supplied to tower bottom liquid in chemical fertilizer preparation facilitiess (5)
Flow-rate ratio be 300:1, the tower bottom liquid of tower bottom liquid circulated sprinkling layer (16) contacting with flue gas adverse current and
The flow-rate ratio of the shower water of flue gas cool-down layer is 120:1.By online pollutant analysis instrument (cems)
Method is measured to the concentration of oxysulfide, nitrogen oxides and dust in the flue gas before and after purifying, its
Result is as shown in table 1.
Embodiment 2
Flue gas is carried out with spray cooling to 100 DEG C in pollution discharge (1), flue gas will be recycled to
The tower bottom liquid of tower bottom liquid circulated sprinkling layer (16) of washing tower device (3) fills with being supplied to chemical fertilizer preparation
The flow-rate ratio putting tower bottom liquid in (5) is 200:1, the tower bottom liquid circulated sprinkling layer contacting with flue gas adverse current
(16) tower bottom liquid and the flow-rate ratio of the shower water of flue gas cool-down layer are 50:1, in addition, with reality
Apply example 1 and similarly ammonia flue gas dust-removal and desulfurizing denitration one is carried out to the flue gas from On Fcc Waste Heat Boiler
Body purified treatment.By online pollutant analysis instrument (cems) method in the flue gas before and after purifying
The concentration of oxysulfide, nitrogen oxides and dust be measured, its result is as shown in table 1.
Embodiment 3
Flue gas is carried out with spray cooling to 150 DEG C in pollution discharge (1), flue gas will be recycled to
The tower bottom liquid of tower bottom liquid circulated sprinkling layer (16) of washing tower device (3) fills with being supplied to chemical fertilizer preparation
The flow-rate ratio putting tower bottom liquid in (5) is 500:1, the tower bottom liquid circulated sprinkling layer contacting with flue gas adverse current
(16) tower bottom liquid and the flow-rate ratio of the shower water of flue gas cool-down layer are 200:1, in addition, with reality
Apply example 1 and similarly ammonia flue gas dust-removal and desulfurizing denitration one is carried out to the flue gas from On Fcc Waste Heat Boiler
Body purified treatment.By online pollutant analysis instrument (cems) method in the flue gas before and after purifying
The concentration of oxysulfide, nitrogen oxides and dust be measured, its result is as shown in table 1.
Table 1
Ammonia flue gas dust-removal and desulfurizing denitrification integral cleaning system according to the present invention and its method, 1) remove
Dirt, desulfurization and denitration efficiency can respectively reach 90%, 95% and more than 85%;2) in gas cleaning
While can with producing ammonium sulfate byproduct and ammonium nitrate mixed fertilizer, reach pollutant resourcesization recovery purpose;
3) not externally discharged waste water, has prevented environment is caused with the probability of secondary pollution;4) flue gas desulfurization and denitrification mistake
Journey is concentrated in a scrubbing tower and is completed, and flow process is simple, and plant area is less, also can be effectively reduced simultaneously
Plant investment.
Describe the preferred embodiment of the present invention above in association with accompanying drawing in detail, but, the present invention does not limit
Detail in above-mentioned embodiment, in the range of the technology design of the present invention, can be to the present invention
Technical scheme carry out multiple simple variant, these simple variant belong to protection scope of the present invention.Example
As single-effect vacuum evaporation crystallization equipment changed into multiple-effect vacuum evaporation crystallization equipment as chemical fertilizer system
Standby device.
It is further to note that each particular technique feature described in above-mentioned specific embodiment,
In the case of reconcilable, can be combined by any suitable means, for example, flue gas be imported dress
Put (1) to include flue gas import pipe and be arranged on flue gas cool-down device and ozone in flue gas import pipe
Feedway (2) includes ozonator and the situation of ozone distributor combination.In order to avoid unnecessary
Repetition, the present invention no longer separately illustrates to various possible compound modes.
Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as its
Without prejudice to the thought of the present invention, it equally should be considered as content disclosed in this invention.
Claims (10)
1. a kind of ammonia flue gas dust-removal and desulfurizing denitrification integral cleaning system is it is characterised in that this purification
System includes pollution discharge (1), ozone supply means (2), flue gas washing tower apparatus (3), consolidates
Body dust removing means (4), chemical fertilizer preparation facilitiess (5) and flue gas discharger (6) are described smelly
Oxygen supply device (2) is connected with described pollution discharge (1), for by described ozone supply means
(2) ozone producing in is mixed in the flue gas stream in described pollution discharge (1), described flue gas
Gatherer (1) is connected with the middle part of described flue gas washing tower apparatus (3), for being mixed with ozone
Flue gas imports in described flue gas washing tower apparatus (3), in the tower of described flue gas washing tower apparatus (3)
Body top is provided with condensate water recovery device (7), and described flue gas discharger (6) is washed with described flue gas
Wash tower apparatus (3) top to be connected, for the flue gas after washing is discharged, described flue gas washing tower apparatus
(3) bottom is connected with described solid dust removing means (4) entrance, described solid dust removing means
(4) outlet respectively with described flue gas washing tower apparatus (3) top and described chemical fertilizer preparation facilitiess (5)
It is connected.
2. ammonia flue gas dust-removal and desulfurizing denitrification integral cleaning system according to claim 1, its
In, described pollution discharge (1) includes flue gas import pipe and is arranged in flue gas import pipe
Flue gas cool-down device.
3. ammonia flue gas dust-removal and desulfurizing denitrification integral cleaning system according to claim 1, its
In, described ozone supply means (2) include ozonator and ozone distributor.
4. the ammonia flue gas dust-removal and desulfurizing denitrification integral according to any one in claim 1-3
Cleaning system, wherein, in addition to condensate water recovery device (7), described flue gas washing tower apparatus (3)
Also include the flue gas cool-down layer below condensate water recovery device (7) and tower bottom liquid circulated sprinkling layer (16).
5. the ammonia flue gas dust-removal and desulfurizing denitrification integral according to any one in claim 4 is net
Change system, wherein, described solid dust removing means (4) and described flue gas washing tower apparatus (3)
Tower bottom liquid circulated sprinkling layer (16) is connected.
6. a kind of ammonia flue gas dust-removal and desulfurizing denitrification integral purification method is it is characterised in that this purification
Method includes following operation:
Ozone treatment process is it would be desirable to the flue gas purifying directly and ozone contact, makes the nitrogen oxidation in flue gas
Thing aoxidizes;
Flue gas washing operation: in the presence of oxygen, by the flue gas after ozone is processed with contain ammonia
Serosity counter current contacting, carry out flue gas washing;And,
Chemical fertilizer preparation section: after the solid dust removing in the solution after flue gas washing, a part of solution
It is back in flue gas washing operation and uses as the serosity containing ammonia, a part of condensing crystallizing simultaneously is dried
Prepare chemical fertilizer;
Wherein, in flue gas washing operation, also include the operation to flue gas condensing Water Sproading.
7. ammonia flue gas dust-removal and desulfurizing denitrification integral purification method according to claim 6, its
In, this purification method also included the first flue gas cool-down treatment process before ozone treatment process, by flue gas
Temperature control at 100-150 DEG C.
8. the ammonia flue gas dust-removal and desulfurizing denitrification integral purification method according to claim 6 or 7,
Wherein, in flue gas washing operation, after flue gas and the serosity counter current contacting containing ammonia, carry out further
Second flue gas cool-down is processed.
9. ammonia flue gas dust-removal and desulfurizing denitrification integral purification method according to claim 8, its
In, in chemical fertilizer preparation section, after solid dust removing, it is back to molten in flue gas washing operation
The flow-rate ratio of liquid and the solution for preparing chemical fertilizer is 200:1-500:1.
10. ammonia flue gas dust-removal and desulfurizing denitrification integral purification method according to claim 9, its
In, the flow-rate ratio for the serosity contacting with flue gas adverse current and the water processing for the second flue gas cool-down is 50:
1-200:1.
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