CN109331647A - Flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus and its processing method - Google Patents
Flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus and its processing method Download PDFInfo
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- CN109331647A CN109331647A CN201811339309.8A CN201811339309A CN109331647A CN 109331647 A CN109331647 A CN 109331647A CN 201811339309 A CN201811339309 A CN 201811339309A CN 109331647 A CN109331647 A CN 109331647A
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- flue gas
- denitration
- air
- area
- integrated apparatus
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- 239000003546 flue gas Substances 0.000 title claims abstract description 92
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 238000003672 processing method Methods 0.000 title claims abstract description 10
- 239000007789 gas Substances 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 239000000428 dust Substances 0.000 claims abstract description 19
- 230000000694 effects Effects 0.000 claims abstract description 10
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims description 28
- 238000010410 dusting Methods 0.000 claims description 23
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 22
- 239000003054 catalyst Substances 0.000 claims description 20
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 12
- 229910021529 ammonia Inorganic materials 0.000 claims description 11
- 238000007664 blowing Methods 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 229910000765 intermetallic Inorganic materials 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 3
- 239000003517 fume Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 238000000746 purification Methods 0.000 abstract description 6
- 230000004888 barrier function Effects 0.000 abstract description 2
- 238000005192 partition Methods 0.000 abstract description 2
- 239000002956 ash Substances 0.000 description 27
- 238000005265 energy consumption Methods 0.000 description 4
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/02—Arrangements of regenerators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The present invention relates to flue gases purification field, a kind of flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus and its processing method are disclosed.The present invention is connected between boiler economizer and desulfurizing tower, including shell, enclosure interior is the horizontal alignment dedusting area and combined reaction area arranging and be interconnected by barrier partitions, is disposed with denitration region and air preheating area along flow of flue gas direction in combined reaction area；Gas inlet is offered in the housing sidewall of dedusting area, offers exhanst gas outlet in the housing sidewall of combined reaction area bottom；The high-temperature dust removal module that filtering can be directly dusted to 350-400 DEG C of flue gas is provided in dedusting area；Combined reaction area top is denitration region；Air preheating area is located at immediately below denitration region, is internally provided with air preheater.The configuration of the present invention is simple, economic cost and operating cost are low, and apparatus structure is simple, good dedusting effect, and denitration efficiency is high, and equipment volume is small.
Description
Technical field
The present invention relates to flue gases purification fields, integrally disguise more particularly to a kind of flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN
It sets and its processing method.
Background technique
It is poisonous and harmful containing a large amount of carbon dioxide, sulfur dioxide, flue dust and dust etc. in the flue gas that coal burning generates
Substance and impurity is an important factor for causing atmosphere pollution, therefore before discharge, it is necessary to by stringent denitration, desulfurization, remove
Dirt processing, is just able to satisfy discharge standard.
In more traditional flue gas purification system, denitration, desulfurization, dedusting are all equipped with purification reactor independent, whole
Equipment needed for a processing system is more, and structure is complicated, takes up a large area, and investment cost and operating cost is high, and different function
Between each equipment, either on the clean-up effect that the selection of type still finally embodies, all there is stronger restriction, in turn
Influence overall clean-up effect.
There are the research and use of some integrated apparatus at present, one is by wet desulphurization, denitration and electrostatic precipitator technology
It combines to form integrated apparatus, but the device volume formed is huge, internal structure is complicated, and operation water consumption is big, is easy shape
At wet misty rain, operating cost and maintenance cost are higher；One is combining dust-extraction unit with desulfurizing tower, but this equipment is usual
Energy consumption is high, and technical process control difficulty is big, and clean-up effect stability is poor.
The flue gas temperature also with higher of these integrated apparatus discharge can in order to make full use of this partial heat energy source
Additionally to add air preheater in purification system, the air before entering boiler is preheated using this partial heat energy, is mentioned
The heat exchange performance of high boiler reduces energy consumption, but is influenced by dust in flue gas, the selection form of air preheater
By biggish limitation, heat exchange efficiency is lower.
Summary of the invention
The present invention provides one kind relative to traditional handicraft, and construction cost and operating cost are low, and apparatus structure is simple, dedusting effect
Fruit is good, and denitration efficiency is high, the small flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of equipment volume and its processing method.
The technical issues of solution, is: existing integrated apparatus, bulky, and internal structure is complicated, cost of investment and operation
At high cost, technical process control difficulty is big, and clean-up effect stability is poor.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
Flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of the present invention, is connected between boiler economizer and desulfurizing tower, including shell
Body, enclosure interior is by dedusting area and combined reaction area that barrier partitions are that horizontal alignment arranges and is interconnected, combined reaction area
It is interior to be disposed with denitration region and air preheating area along flow of flue gas direction；
Gas inlet is offered in the housing sidewall of dedusting area, is offered flue gas in the housing sidewall of combined reaction area bottom and is gone out
Mouthful；
The high-temperature dust removal module that filtering can be directly dusted to 350-400 DEG C of flue gas is provided in dedusting area；
Combined reaction area top is denitration region, is provided with multilayer denitrating catalyst in denitration region；
Air preheating area is located at immediately below denitration region, is internally provided with air preheater, the air inlet of air preheater with
The connection of fan outlet pipeline, air outlet are connected by the wind main pipe of hot air delivery pipe road and boiler.
Flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of the present invention, further, the baffle is vertically arranged, bottom side edge
Along and Housing Base sealing fix, and two sides along and housing sidewall sealing fix, between top edge and cover top plate there are
Horizontally disposed exhaust gases passes.
Flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of the present invention, further, the high-temperature dust removal module include more
The metal dusting cylinder of a horizontal alignment arrangement, metal dusting cylinder are vertically arranged, and uniform intervals are arranged in the cross section of dedusting area.
Flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of the present invention, further, the metal dusting cylinder is by metal
Tubular filter element made of anisotropic membrane intermetallic compound porous material made of powder sintered.
Flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of the present invention is further set right above the metal dusting cylinder
It is equipped with blowing device, the air inlet of the blowing device and the compressed air tunnel of hull outside connect.
Flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of the present invention, further, the setting height of the blowing device
Concordant with the top edge of baffle, gas inlet is lower than orifice plate setting at the top of metal dusting cylinder.
Flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of the present invention, further, the dedusting area bottom is provided with ash
It struggles against, is provided with ash-valve at the outlet at bottom of ash bucket.
Flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of the present invention, further, the aperture of the denitrating catalyst is
3-5mm。
Flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of the present invention, further, the air preheater include at least 2
The surface-type heat exchanger that a fume side is connected in series, surface-type heat exchanger are intervally arranged up and down.
The processing method of flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of the present invention, comprising the following steps:
Step 1: the high-temperature flue gas of boiler economizer discharge enters dedusting area after mixing with ammonia, the flow velocity of high-temperature flue gas is hindered
Slow down, dust and floating material therein are intercepted by metal dusting cylinder, fall into housing bottom；
Step 2: the high-temperature flue gas after dedusting goes successively to denitration region, catalysis of the nitrogen oxides in flue gas in denitrating catalyst
Effect is lower to react with the ammonia in air, is reduced to nitrogen；
Step 3: the flue gas after dedusting denitration carries out heat exchange, temperature by the cold air in air preheating area, with air preheater
Integrated apparatus is discharged from the exhanst gas outlet of bottom after degree reduction；
Step 4: the flue gas of discharge introduces the purified treatment that desulfurizing tower carries out next step by air-introduced machine.
Flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of the present invention and its processing method compared with prior art, have such as
It is lower the utility model has the advantages that
Flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus internal structure of the present invention is simple, more than high-temperature dust removal, denitration and utilization
Heat carries out air preheat and integrates makeup and set, and enormously simplifies smoke processing system, reduce equipment input cost and
Operation expense.
It is divided into the dedusting area and combined reaction area of connection in apparatus of the present invention shell, the flue gas of entrance first passes through dedusting area,
It is removed using the intermetallic compound anisotropic membrane that can directly handle 350-400 DEG C of high-temperature flue gas is porous except dirt barrel carries out high temperature
Dirt, dust removing effects are good, and the 1/1500 of dustiness, can achieve 1- in the former flue gas of dustiness deficiency after filtering in flue gas
20mg/Nm3, high degree improve the efficiency of subsequent denitration and UTILIZATION OF VESIDUAL HEAT IN, therefore can select aperture is the small of 3-5mm
Aperture denitrating catalyst increases the specific surface area of denitrating catalyst without clogging, improves the denitration of flue gas
Reaction efficiency extends the service life of catalyst.
Flue gas of the present invention reduces the velocity of liquid assets of flue gas when passing through metal dusting cylinder, fill convenient for flue gas and denitrification reducing agent
Divide and be mixed, improves denitration efficiency, avoid the setting in extra flow-disturbing space；The setting of small-bore denitrating catalyst is reduced
Catalyst needs the area being arranged, and substantially reduces the volume of integrated apparatus.
Flue gas of the present invention Jing Guo dedusting denitration is directly over air preheater, recovered flue gas heat, before entering boiler
Air preheated, improve the heat exchange performance of boiler, reduce energy consumption；It is just surface because high-temperature dust removal works well
The application of formula heat exchanger provides possibility.
With reference to the accompanying drawing to flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of the invention and its processing method make into
One step explanation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of the present invention.
Appended drawing reference:
1- shell；11- gas inlet；12- exhanst gas outlet；2- baffle；The dedusting area 3-；4- combined reaction area；5- exhaust gases passes；6-
Metal dusting cylinder；61- ash bucket；62- ash-valve；7- blowing device；8- denitrating catalyst；9- air preheater.
Specific embodiment
As shown in Figure 1, flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of the present invention is connected to boiler economizer and desulfurization
Between tower, including shell 1, the dedusting area 3 and combined reaction area 4 of horizontal alignment arrangement are divided into inside shell 1 by baffle 2, it is comprehensive
It closes in reaction zone 4 and is disposed with denitration region and air preheating area along flow of flue gas direction.
Baffle 2 in shell 1 is vertically arranged, and bottom side edge seals fixation, and two sides edge and shell 1 along with 1 bottom plate of shell
Side wall sealing is fixed, and there are horizontally disposed exhaust gases passes 5 between 1 top plate of top edge and shell, anti-for dedusting area 3 and synthesis
The flue gas in area 4 is answered to circulate；Gas inlet 11 is offered on 1 side wall of shell of dedusting area 3, gas inlet 11 passes through short-range water
The outlet of flat flue and boiler economizer connects, and is provided with air-introduced machine on horizontal flue；1 side of shell of 4 bottom of combined reaction area
Exhanst gas outlet 12 is offered on wall, exhanst gas outlet 12 is connect by flue with desulfurizing tower, and air-introduced machine is again provided on flue.
High-temperature dust removal module is provided in dedusting area 3, can the flue gas to 350-400 DEG C of high temperature be directly dusted place
Reason, high-temperature dust removal module include the metal dusting cylinder 6 of multiple horizontal alignment arrangements, and metal dusting cylinder 6 is vertically arranged, in dedusting area
Uniform intervals are arranged in 3 cross section, and metal dusting cylinder 6 is the anisotropic membrane intermetallic compound as made of metal powder sintered
Tubular filter element made of porous material；Blowing device 7 is provided with right above metal dusting cylinder 6, blowing device 7 blows for sound wave
The air inlet of grey device, blowing device 7 is connect with the compressed air tunnel outside shell 1；The setting height of blowing device 7 with
The top edge of baffle 2 is concordant, and gas inlet 11, which is lower than at the top of metal dusting cylinder 6, to be arranged.
3 bottom of dedusting area is provided with ash bucket 61, and ash-valve 62, metal dusting cylinder 6 are provided at the outlet at bottom of ash bucket 61
The ashes of collection is fallen into ash bucket 61, is discharged by ash-valve 62, and the flue gas that the flue gas after dedusting passes upward through 1 top of shell is logical
Road 5 enters combined reaction area 4.
4 top of combined reaction area is denitration region, is provided with multilayer denitrating catalyst 8, the hole of denitrating catalyst 8 in denitration region
Diameter is 3-5mm；Denitration spray ammonia point is arranged on the pipeline between integrated apparatus and boiler economizer, after flue gas is mixed with ammonia
Into integrated apparatus, the flue gas for being mixed with ammonia by dust separation passes through the circulation aperture of denitrating catalyst 8, removes smoke abatement
Flue gas after nitrogen oxides in gas continues downwards by air preheating area.
Air preheating area is located at immediately below denitration region, is internally provided with air preheater 9, and air preheater 9 includes at least 2
The surface-type heat exchanger that a fume side is connected in series, surface-type heat exchanger are intervally arranged up and down, the air inlet of air preheater 9
Mouth is connect with primary air fan or secondary air fan outlet conduit, and air outlet passes through the First air in hot air delivery pipe road and boiler
Main pipe or the connection of Secondary Air main pipe；Exhanst gas outlet 12 is located at below air preheating area；High-temperature flue gas after dedusting denitration passes through table
Face formula heat exchanger carries out heat exchange with cold air, makes full use of the waste heat of flue gas, will preheat into the air before boiler,
The heat exchange performance of boiler is improved, energy consumption is reduced.
The processing method of flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus of the present invention, comprising the following steps:
Step 1: integrated apparatus is introduced through air-introduced machine, into removing after the high-temperature flue gas of boiler economizer discharge is mixed with ammonia
Dirt area 3, by metal dusting cylinder 6, the flow velocity of high-temperature flue gas, which is hindered, to be slowed down, and dust and floating material therein are by metal dusting cylinder 6
It intercepts, falls into the ash bucket 61 of bottom, shell 1 is periodically discharged by ash-valve 62；
After metal dusting cylinder 6,1/1500 of the insufficient former dust content of dustiness in flue gas, boiler economizer outlet
Flue-gas temperature is 350-400 DEG C, and dust content therein is 30-40g/Nm3, and the dust content after dust removal and filtration is 1-
The phenomenon that 20mg/Nm3 is not in the blocking circulation aperture of denitrating catalyst 8；
Mixed flue gas low speed is more advantageous to being sufficiently mixed for flue gas and ammonia by metal dusting cylinder 6 simultaneously.
Step 2: the high-temperature flue gas after dedusting enters denitration region by the exhaust gases passes 5 at 1 top of shell, the nitrogen in flue gas
With the ammonia in air redox reaction occurs for oxide under the catalytic action of denitrating catalyst 8, and nitrogen oxides is reduced
For nitrogen, flue gas enters the air preheating area of lower section by the circulation aperture of denitrating catalyst 8；
The dustiness in flue gas due to entering denitration region is only 1-20mg/Nm3, substantially reduces equipment normal operation institute
The circulation aperture of the denitrating catalyst 8 needed, increases the specific surface area of denitrating catalyst 8, improves the denitration reaction of flue gas
Efficiency extends the service life of catalyst, and since flue gas first passes through metal dusting cylinder 6, reduces flowing velocity, therefore
Denitration region flue gas mixed with the ammonia in air more sufficiently, denitration effect is improved in the case where no setting is required spoiler
Rate.
Step 3: the flue gas after dedusting denitration carries out hot friendship by the cold air in air preheating area, with air preheater 9
After changing, integrated apparatus is discharged from the exhanst gas outlet 12 of bottom；
The cold air and high temperature purification flue gas heat exchange in air preheater 9 are flowed through, temperature enters back into boiler after increasing, and improves pot
The efficiency of furnace.
Step 4: the flue gas of discharge introduces the purified treatment that desulfurizing tower carries out next step by air-introduced machine.
Embodiment described above only describe the preferred embodiments of the invention, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made should all be fallen into the protection scope that claims of the present invention determines.
Claims (10)
1. flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus, it is characterised in that: it is connected between boiler economizer and desulfurizing tower,
Including shell (1), shell (1) is internal to be divided into dedusting area (3) that horizontal alignment arranges and is interconnected and comprehensive by baffle (2)
It closes reaction zone (4), is disposed with denitration region and air preheating area along flow of flue gas direction in combined reaction area (4)；
It is offered gas inlet (11) on shell (1) side wall of dedusting area (3), shell (1) side wall of combined reaction area (4) bottom
On offer exhanst gas outlet (12)；
The high-temperature dust removal module that filtering can be directly dusted to 350-400 DEG C of flue gas is provided in dedusting area (3)；
Combined reaction area (4) top is denitration region, is provided with multilayer denitrating catalyst (8) in denitration region；
Air preheating area is located at immediately below denitration region, is internally provided with air preheater (9), the air of air preheater (9) into
Port is connect with fan outlet pipeline, and air outlet is connected by the wind main pipe of hot air delivery pipe road and boiler.
2. flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus according to claim 1, it is characterised in that: the baffle
(2) it is vertically arranged, bottom side edge seals fixation along with shell (1) bottom plate, and two sides are fixed along with the sealing of shell (1) side wall, top
End edge along with there are horizontally disposed exhaust gases passes (5) between shell (1) top plate.
3. flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus according to claim 1, it is characterised in that: the high temperature removes
Dirt module includes the metal dusting cylinder (6) of multiple horizontal alignment arrangements, and metal dusting cylinder (6) is vertically arranged, in dedusting area (3)
Uniform intervals are arranged in cross section.
4. flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus according to claim 3, it is characterised in that: the metal removes
Dirt barrel (6) is tubular filter element made of the anisotropic membrane intermetallic compound porous material made of metal powder sintered.
5. flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus according to claim 3, it is characterised in that: the metal removes
It is provided with blowing device (7) right above dirt barrel (6), the compressed air of the air inlet of the blowing device (7) and shell (1) outside
Conveyance conduit connection.
6. flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus according to claim 5, it is characterised in that: the blowing dress
The setting height for setting (7) is concordant with the top edge of baffle (2), and gas inlet (11) is lower than orifice plate at the top of metal dusting cylinder (6)
Setting.
7. flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus according to claim 1, it is characterised in that: the dedusting area
(3) bottom is provided with ash bucket (61), and ash-valve (62) are provided at the outlet at bottom of ash bucket (61).
8. flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus according to claim 1, it is characterised in that: the denitration is urged
The aperture of agent (8) is 3-5mm.
9. flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus according to claim 1, it is characterised in that: the air is pre-
Hot device (9) includes the surface-type heat exchanger that at least two fume side is connected in series, and surface-type heat exchanger is intervally arranged up and down.
10. the processing method of flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus according to claim 1, feature exist
In: the following steps are included:
Step 1: the high-temperature flue gas of boiler economizer discharge enters dedusting area (3) after mixing with ammonia, the flow velocity quilt of high-temperature flue gas
Resistance slows down, and dust and floating material therein are intercepted by metal dusting cylinder (6), falls into shell (1) bottom；
Step 2: the high-temperature flue gas after dedusting goes successively to denitration region, the nitrogen oxides in flue gas is urged denitrating catalyst (8)
Change effect is lower to react with the ammonia in air, is reduced to nitrogen；
Step 3: the flue gas after dedusting denitration carries out hot friendship by the cold air in air preheating area, with air preheater (9)
It changes, integrated apparatus is discharged from the exhanst gas outlet (12) of bottom after temperature reduction；
Step 4: the flue gas of discharge introduces the purified treatment that desulfurizing tower carries out next step by air-introduced machine.
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| CN201811339309.8A CN109331647A (en) | 2018-11-12 | 2018-11-12 | Flue gas ash removal denitration UTILIZATION OF VESIDUAL HEAT IN integrated apparatus and its processing method |
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Address after: 100039, room 9, floor 1, building 16, No. 901 West Fourth Ring Road, Beijing, Haidian District Applicant after: Guoneng Longyuan environmental protection Co.,Ltd. Address before: 100039, room 1, building 16, No. 911 West Fourth Ring Road, Beijing, Haidian District Applicant before: BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENGINEERING Co.,Ltd. |
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Application publication date: 20190215 |