CN205914020U - Modular flue gas denitration system - Google Patents
Modular flue gas denitration system Download PDFInfo
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- CN205914020U CN205914020U CN201620653573.9U CN201620653573U CN205914020U CN 205914020 U CN205914020 U CN 205914020U CN 201620653573 U CN201620653573 U CN 201620653573U CN 205914020 U CN205914020 U CN 205914020U
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Abstract
The utility model provides a modular flue gas denitration system, including desalting water tank, aqueous ammonia storage jar, compressed air reservoir, desalting water tank is connected with static mixer through removing salty water convey module and desalination water metering adjusting module, ammonia storing tank passes through the aqueous ammonia and carries module and ammonia water metering adjusting module to be connected with static mixer, static mixer and compressed air reservoir are connected with the distribution module, the distribution module is connected with SNCR dosing module, SNCR dosing module sets up in boiler furnace's exhanst gas outlet department, boiler furnace's exhanst gas outlet department is connected with cyclone, cyclone is connected with afterbody heated surface tube panel, afterbody heated surface tube panel is including the over heater that from top to bottom sets gradually, high -temperature economizer, flue gas guide device, ammonia injection grid, catalytic module, the low -level (stack -gas) economizer, a coal economizer and an air preheater, ammonia injection grid is connected with ammonia generating means, not only denitrification effect is good, and can fine solution catalyst deposition, the wearing and tearing scheduling problem.
Description
Technical field
This utility model is related to a kind of assembled smoke gas denitrating system.
Background technology
Nox, as forming one of acid rain and photochemical fog and main matter of damaging the ozone layer, has very strong toxicity,
To human body, environment, ecological very harmful.The data display announced according to national environmental protection, the row of nox discharge capacity ranking front three
Industry is followed successively by the production of electric power and heating power and supplies industry, nonmetallic grounded module, ferrous metal smelting and rolling processing industry, about
Account for the 81.4% of Statistics nox discharge capacity.Wherein the production of electric power and heating power and supply industry account for 64.8%.
At present or even in a very long time from now on, the electric power in physical ability source and the production of heating power and supply based on coal
Industry, the nox that its coal-fired boiler combustion produces in flue gas is still one of main source of artificial nox.For this reason, realizing coal-burning boiler
The effective control of nox discharge, remains the important process of national emission reduction work.
Issue on July 29th, 2011 with gb13223-2011 " fossil-fuel power plant atmospheric pollutant emission standard ", from 2012
Since execution from January 1, in, the coal-burning boiler in the whole country has been basically completed nox and has allowed emission limit 100mg/nm3(weight
Point area) and the non-key area of 200mg/nm3() flue gas denitrification system reform strengthening.Wherein denitration restoration and reuse is the widest
General, technology is the most ripe, run technique the most stable mainly the low nitrogen transformation of combustion system, SNCR method
(hereinafter referred to as sncr) and selective catalytic reduction (hereinafter referred to as scr).
For the discharge of coal-burning boiler atmosphere pollution of keeping under strict control further, " the coal electricity energy-conservation printed and distributed according to the General Office of the State Council
Reduce discharging upgrading with transformation action plan (2014 the year two thousand twenty) " requirement, each key area put into effect successively " coal electricity energy-saving and emission-reduction
All it has been distinctly claimed Thermal generation unit Air Pollutant Emission concentration in upgrading and transformation implementation plan " and basically reached combustion gas wheel
Unit emission limit, that is, under the conditions of benchmark oxygen content 6%, flue dust, so2, nox concentration of emission respectively no higher than 10,35,50mg/
nm3.
Therefore, mark upgrading is carried to currently built fire coal boiler fume denitrating system, Thermal Power Generation Industry certainly will be become
The ecological requirements of a new round.Especially with the stronger CFBB of coal adaptability, more select throwing than important place
The relatively low sncr flue-gas denitration process of money construction cost, disclosure satisfy that the discharge that nox concentration is less than 100mg/nm3 will substantially
Ask.But the stability that the supplies consumption of sncr denitrating system is big, run by the change of boiler load and coal affected greatly, incomplete
The objective factors such as the impact to boiler back end ductwork heating surface for the excessive reducing agent nh3 of reaction, and key area coal-burning boiler
The policy requirements of more strict nox emission limit 50mg/nm3 etc. will be executed, be simple sncr flue gas denitrification system institute
Insurmountable.
How on the basis of former sncr denitrating technique, carry out transformation and upgrade lower cost, solve above-mentioned sncr denitration system
The disadvantage that system exists, on the premise of guaranteeing fire coal boiler fume nox emission compliance, farthest ensures the thermal efficiency of boiler
And operation stability, a very promising developing way will be become.
Content of the invention
The purpose of this utility model is to overcome the shortcomings of above-mentioned technology, thus providing a kind of assembled smoke gas denitration system
System, not only denitration effect is good, and can solve the problems such as catalyst dust stratification, abrasion very well.
This utility model be employed technical scheme comprise that such: assembled smoke gas denitrating system, including sweet-water tank, ammonia
Water storage tank, compressed air reservoir, described sweet-water tank pass through demineralized water conveyor module and demineralized water measure adjustment module with
Static mixer connects, and described tank used for storing ammonia passes through ammonia conveyor module and ammonia measures adjustment module and described static mixing
Device connects, and described static mixer and described compressed air reservoir are connected with distribute module, and described distribute module is connected with
Sncr jet module, described sncr jet module is arranged at the smoke outlet of boiler furnace, and the flue gas of described boiler furnace goes out
Mouthful at be connected with cyclone separator, described cyclone separator is connected with afterbody heating device, described afterbody heating device include by
The superheater that up to sets gradually down, high-temperature economizer, flue gas flow guiding device, ammonia-spraying grid, catalytic module, low-level (stack-gas) economizer,
Air preheater, described ammonia-spraying grid is connected with ammonia generating mechanism；
Described ammonia generating mechanism includes ammonia carburator, and the air intake vent of described ammonia carburator is provided with booster fan,
Described ammonia carburator is connected with described compressed air reservoir, described sweet-water tank and described ammonia storage tank respectively, institute
The ammonia outlet stating ammonia carburator is connected with described ammonia-spraying grid；
Described catalytic module includes catalyst body, the ceramic honey comb layer being arranged at described catalyst body upper surface, sets
It is placed between described ammonia-spraying grid and described ceramic honey comb layer and be used for clearing up the deashing mechanism of described ceramic honey comb layer surface dust stratification；
Described deashing mechanism includes being horizontally set at the turn-screw above described ceramic honey comb layer and described turn-screw
The mobile swivel nut that matches, rotate the rotary nozzle being arranged on described mobile swivel nut, the two ends fixation of described turn-screw sets
It is equipped with discoidal swivel joint, wherein swivel joint described in side is by the first motor-driven rotation, swivel joint described in both sides
Between be provided with that section is triangular in shape or the guide post of rectangle, described swivel joint offers and matches with described guide post
Pilot hole, described swivel joint be hollow structure, the periphery wall of described swivel joint offers some clean-out hatch, described rotation
Adaptor is connected with compressed gas source by compressed gas delivery pipe, is additionally provided with described for being wound around outside described saver device
The wind of compressed gas delivery pipe, tub that described wind includes being fixedly installed, rotates and is arranged in described tub
Winding tube filler, described winding tube filler is provided with spiral support by the second motor-driven rotation, the periphery wall of described winding tube filler
Plate, described spiral brancheses fagging offers arcuate groove, and described compressed gas delivery pipe is located in described arcuate groove.
Further improved it is: described high-temperature economizer and described low-level (stack-gas) economizer are H type fin tubular type economizer.
Further improved it is: catalyst installation door is offered on described saver device, sets in described saver device
It is equipped with the lifting calabash for lifting described catalyst module.
Further improved it is: it is female that described ammonia-spraying grid includes two grids being connected with described ammonia generating mechanism
Pipe, some tubulations in u-shaped being connected between two described grid main pipes, the lower 30 ° of sides of the level of every described tubulation and side
To common arrangement four row's nozzles, every described tubulation is respectively arranged with pressure tester and adjusts switch valve.
Further improved it is: in two described grid main pipes, be connected to some supports.
By adopting preceding solution, the beneficial effects of the utility model are:
1st, sncr+scr combined denitration technology is with reference to the low cost of sncr technology, transformation be easy and scr technique to high-efficiency rate
Feature, that is, overcome the requirement that sncr denitration efficiency can not meet nox minimum discharge, reduce application the building of scr technology again
And if operating cost.Combine the technical advantage of sncr and scr, maximize favourable factors and minimize unfavourable ones, be combined with scr engineering method by sncr, can stablize
Reach more than 80% denitration efficiency, and reduce operating cost, reduce investment outlay；
2nd, the optimization of ammonia-spraying grid, for the narrow spatial altitude of scr Benitration reactor in specific stove, from ammonia spray site
Coverage rate and the convenience controlling and safeguarding cleaning etc. that adjusts of the mixability of flue gas, ammonia usage all have optimization to improve,
Thus improve the utilization rate of reducing agent ammonia, that is, controlling the consumption consumption of ammonia, reducing supplies consumption cost；
3rd, pass through setting ceramic honey comb layer and effectively can reduce catalyst abrasion, and can be had by arranging deashing mechanism
Effect solves the problems, such as catalyst dust stratification.
Brief description
Fig. 1 is this utility model system flow chart；
Fig. 2 is saver device schematic diagram；
Fig. 3 is ammonia-spraying grid side view；
Fig. 4 is ammonia-spraying grid top view；
Fig. 5 is deashing mechanism schematic diagram.
Wherein: 1, sweet-water tank；2nd, ammonia storage tank；3rd, compressed air reservoir；4th, demineralized water conveyor module；5th, demineralized water
Metering adjustment module；6th, static mixer；7th, ammonia conveyor module；8th, ammonia metering adjustment module；9th, distribute module；10th, pot
Stove burner hearth；11st, sncr jet module；12nd, cyclone separator；13rd, superheater；14th, high-temperature economizer；15th, flue gas flow guiding device；
16th, catalyst body；17th, ceramic honey comb layer；18th, low-level (stack-gas) economizer；19th, air preheater；20th, turn-screw；21st, mobile spiral shell
Set；22nd, swivel joint；23rd, guide post；24th, rotary nozzle；25th, compressed gas delivery pipe；26th, tub；27th, it is wound around tube filler；
28th, spiral brancheses fagging；29th, grid main pipe；30th, tubulation；31st, pressure tester；32nd, adjust switch valve；33rd, booster fan；34th, ammonia
Water vaporizer.
Specific embodiment
To further illustrate this utility model below in conjunction with the drawings and specific embodiments.
As Figure 1-Figure 5, this utility model discloses a kind of assembled smoke gas denitrating system, including sweet-water tank 1, ammonia
Storage tank 2, compressed air reservoir 3, described sweet-water tank 1 passes through demineralized water conveyor module 4 and demineralized water measures adjustment module 5
Be connected with static mixer 6, described ammonia storage tank 2 pass through ammonia conveyor module 7 and ammonia measure adjustment module 8 with described
Static mixer 6 connects, and described static mixer 6 and described compressed air reservoir 3 are connected with distribute module 9, described point
Join module 9 and be connected with sncr jet module 11, described sncr jet module 11 is arranged at the smoke outlet of boiler furnace 10, institute
The smoke outlet stating boiler furnace 10 is connected with cyclone separator 12, and described cyclone separator 12 is connected with afterbody and is subject to hot charging
Put, superheater 13 that described afterbody heating device includes from top to bottom setting gradually, high-temperature economizer 14, flue gas flow guiding device
15th, ammonia-spraying grid, catalytic module, low-level (stack-gas) economizer 18, air preheater 19, described ammonia-spraying grid is connected with ammonia generating mechanism
Connect；
Described ammonia generating mechanism includes ammonia carburator 34, and the air intake vent of described ammonia carburator 34 is provided with supercharging wind
Machine 33, described ammonia carburator 34 respectively with described compressed air reservoir 3, described sweet-water tank 1 and described ammonia storage tank 2
It is connected, the ammonia outlet of described ammonia carburator 34 is connected with described ammonia-spraying grid；
Described catalytic module includes catalyst body 16, is arranged at the ceramic honey comb layer of described catalyst body 16 upper surface
17th, it is arranged between described ammonia-spraying grid and described ceramic honey comb layer 17 and be used for clearing up described ceramic honey comb layer 17 superficial dust
Deashing mechanism；
Described deashing mechanism includes being horizontally set at the turn-screw of described ceramic honey comb layer 17 top and described driving wire
Mobile swivel nut 21 that thick stick matches, rotate the rotary nozzle 24 being arranged on described mobile swivel nut 21, the two of described turn-screw
End is fixedly installed discoidal swivel joint 22, and wherein described in side, swivel joint 22 is by the first motor-driven rotation, both sides
It is provided between described swivel joint 22 that section is triangular in shape or the guide post 23 of rectangle, described swivel joint 22 offers
The pilot hole matching with described guide post 23, described swivel joint 22 is hollow structure, the periphery wall of described swivel joint 22
On offer some clean-out hatch, described swivel joint 22 is connected with compressed gas source by compressed gas delivery pipe 25, described province
It is additionally provided with the wind for being wound around described compressed gas delivery pipe 25, described wind includes fixing outside coal device device
The tub 26 of setting, rotation are arranged at the winding tube filler 27 in described tub 26, and described winding tube filler 27 is by the second Motor drive
Rotate, the described periphery wall being wound around tube filler 27 is provided with spiral brancheses fagging 28, and described spiral brancheses fagging 28 offers arcuate groove,
Described compressed gas delivery pipe 25 is located in described arcuate groove.
Sncr+scr combined denitration technology is with reference to the low cost of sncr technology, transformation be easy and scr technique to high-efficiency rate
Feature, that is, overcome the requirement that sncr denitration efficiency can not meet nox minimum discharge, reduces the construction of application scr technology again
And operating cost.Combine the technical advantage of sncr and scr, maximize favourable factors and minimize unfavourable ones, be combined with scr engineering method by sncr, can stably reach
To more than 80% denitration efficiency, and reduce operating cost, reduce investment outlay；
Effectively catalyst abrasion can be reduced by arranging ceramic honey comb layer 17, and can be had by arranging deashing mechanism
Effect solves the problems, such as catalyst dust stratification, and the leading portion of catalyst windward side is most susceptible to the erosive wear that the high dust of high speed brings,
Though the hardening end of 20mm length is left in catalyst front end during production, the wear-resisting intensity of denitrating catalyst because of vanadium tungsten titanium system has in itself
Certain limitation, is still inevitably present certain abrasion, by increasing 50mm length, pattern and specification in the upper end of catalyst
The honeycomb ceramic body consistent with catalyst monomer, using the higher rigid and wear-resisting feature of pottery, realizes the guarantor to catalyst
Shield, extends the physical life of catalyst, meanwhile, when flue gas (ammonia containing reducing agent) is through honeycomb ceramic body, can obtain preferably
Homogenizing and to enter catalyst flue gas inflow angle significantly revised, further improve catalyst operational efficiency.
Deashing principle: driving swivel joint 22 to rotate by the first motor, thus driving turn-screw to rotate, then moving
Swivel nut 21 is rotated shower nozzle 24 and moves along horizontal direction, is triangle due to being provided with cross section between both sides swivel joint 22
The guide post 23 of shape or rectangle, is limited by guide post 23 degree of freedom, and rotary nozzle 24 relative movement swivel nut 21 rotates, from
And realize rotating ash removal, and by arranging wind, can be defeated to compressed gas with the shift position of mobile swivel nut 21
Pipe 25 is sent to carry out freedom retractable.
It is preferred embodiment that described high-temperature economizer 14 and described low-level (stack-gas) economizer 18 are h in the present embodiment
Type fin tubular type economizer, that is, adopt H type fin tubular type economizer to substitute original Bare Tube Economizer, using H type extended surface tube
Expanded type heating surface feature, vacate the spatial altitude of about half, for arranging monolayer scr catalyst, and, low temperature save coal
After device adopts H type extended surface tube pattern, the more former Bare Tube Economizer of its weight reduces about half, for making up because increasing scr reaction
And the weight that catalyst increases, reduce the shadow to boiler original flue steelframe because of the weighing load setting up the increase of scr Benitration reactor
Ring, reduce steelframe and reinforce difficulty, cost-effective.
It is preferred embodiment that catalyst installation door, described province are offered on described saver device in the present embodiment
It is provided with the lifting calabash for lifting described catalyst module in coal device device.
It is preferred embodiment that described ammonia-spraying grid is included two and is connected with described ammonia generating mechanism in the present embodiment
Logical grid main pipe 29, some tubulations 30 in u-shaped being connected between two described grid main pipes 29, every described tubulation 30
The lower 30 ° of directions of level and side arrange four row's nozzles altogether, every described tubulation 30 is respectively arranged with pressure tester 31 and adjust
Section switch valve 32, two described grid main pipes 29 are connected to some supports.The optimization of ammonia-spraying grid, for specific stove
The narrow spatial altitude of interior scr Benitration reactor, from the mixability of the coverage rate of ammonia spray site and flue gas, ammonia usage
Adjusting convenience controlling and safeguarding cleaning etc. all has optimization to improve, thus improve the utilization rate of reducing agent ammonia, that is, controls
The consumption consumption of ammonia, reduces supplies consumption cost.
Of the present utility model ultimate principle and principal character and its advantage, the technology people of the industry have been shown and described above
It should be appreciated that this utility model is not restricted to the described embodiments, described in above-described embodiment and explanation is that this is described to member
The principle of utility model, on the premise of without departing from this utility model spirit and scope, this utility model also has various change
And improvement, these changes and improvements both fall within the range of claimed this utility model, and this utility model claims scope
By appending claims and its equivalent thereof.
Claims (5)
1. assembled smoke gas denitrating system it is characterised in that: include sweet-water tank, ammonia storage tank, compressed air reservoir, described
Sweet-water tank passes through demineralized water conveyor module and demineralized water is measured adjustment module and is connected with static mixer, described tank used for storing ammonia
Measure adjustment module by ammonia conveyor module and ammonia to be connected with described static mixer, described static mixer and institute
State compressed air reservoir to be connected with distribute module, described distribute module is connected with sncr jet module, described sncr sprays mould
Block is arranged at the smoke outlet of boiler furnace, and the smoke outlet of described boiler furnace is connected with cyclone separator, described rotation
Wind separator is connected with afterbody heating device, and described afterbody heating device includes superheater, the high temperature from top to bottom setting gradually
Economizer, flue gas flow guiding device, ammonia-spraying grid, catalytic module, low-level (stack-gas) economizer, air preheater, described ammonia-spraying grid and ammonia
Gas generating mechanism is connected；
Described ammonia generating mechanism includes ammonia carburator, and the air intake vent of described ammonia carburator is provided with booster fan, described
Ammonia carburator is connected with described compressed air reservoir, described sweet-water tank and described ammonia storage tank respectively, described ammonia
The ammonia outlet of water vaporizer is connected with described ammonia-spraying grid；
Described catalytic module includes catalyst body, the ceramic honey comb layer being arranged at described catalyst body upper surface, is arranged at
It is used between described ammonia-spraying grid and described ceramic honey comb layer clearing up the deashing mechanism of described ceramic honey comb layer surface dust stratification；
The turn-screw that described deashing mechanism includes being horizontally set above described ceramic honey comb layer is matched with described turn-screw
The mobile swivel nut of conjunction, rotation are arranged at the rotary nozzle on described mobile swivel nut, and the two ends of described turn-screw are fixedly installed
Swivel joint described in discoidal swivel joint, wherein side by the first motor-driven rotation, described in both sides between swivel joint
It is provided with that section is triangular in shape or the guide post of rectangle, described swivel joint offers and leading that described guide post matches
Xiang Kong, described swivel joint is hollow structure, the periphery wall of described swivel joint offers some clean-out hatch, described rotation connects
Head is connected with compressed gas source by compressed gas delivery pipe, is additionally provided with for being wound around described compression outside described saver device
The wind of air shooter, tub that described wind includes being fixedly installed, rotates and is arranged at twining in described tub
Around tube filler, described winding tube filler is provided with spiral brancheses fagging, institute by the second motor-driven rotation, the periphery wall of described winding tube filler
State and offer arcuate groove on spiral brancheses fagging, described compressed gas delivery pipe is located in described arcuate groove.
2. assembled smoke gas denitrating system according to claim 1 it is characterised in that: described high-temperature economizer and described
Low-level (stack-gas) economizer is H type fin tubular type economizer.
3. assembled smoke gas denitrating system according to claim 1 it is characterised in that: offer on described saver device
Catalyst installation door, is provided with the lifting calabash for lifting described catalyst module in described saver device.
4. assembled smoke gas denitrating system according to claim 1 it is characterised in that: described ammonia-spraying grid include two with
Grid main pipe that described ammonia generating mechanism is connected, some tubulations in u-shaped being connected between two described grid main pipes,
Four row's nozzles are arranged in the lower 30 ° of directions of the level of every described tubulation and side altogether, and every described tubulation is respectively arranged with pressure measurement dress
Put and adjust switch valve.
5. assembled smoke gas denitrating system according to claim 4 it is characterised in that: in two described grid main pipes respectively
It is connected with some supports.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620653573.9U CN205914020U (en) | 2016-06-28 | 2016-06-28 | Modular flue gas denitration system |
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| CN201620653573.9U CN205914020U (en) | 2016-06-28 | 2016-06-28 | Modular flue gas denitration system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105964142A (en) * | 2016-06-28 | 2016-09-28 | 江苏亿金环保科技有限公司 | Combined type flue gas denitration system |
| CN110030569A (en) * | 2019-05-27 | 2019-07-19 | 桂林航天工业学院 | Based on the photocatelysis oxidation integrated refuse burning system of the selective catalytic denitrification process and method |
| CN110030570A (en) * | 2019-05-27 | 2019-07-19 | 桂林航天工业学院 | Based on the integrated refuse burning system of the selective catalytic denitrification process plasma and method |
-
2016
- 2016-06-28 CN CN201620653573.9U patent/CN205914020U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105964142A (en) * | 2016-06-28 | 2016-09-28 | 江苏亿金环保科技有限公司 | Combined type flue gas denitration system |
| CN110030569A (en) * | 2019-05-27 | 2019-07-19 | 桂林航天工业学院 | Based on the photocatelysis oxidation integrated refuse burning system of the selective catalytic denitrification process and method |
| CN110030570A (en) * | 2019-05-27 | 2019-07-19 | 桂林航天工业学院 | Based on the integrated refuse burning system of the selective catalytic denitrification process plasma and method |
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