CN209612647U - Magnesite shaft furnace flue gas NO_x Reduction by Effective equipment - Google Patents
Magnesite shaft furnace flue gas NO_x Reduction by Effective equipment Download PDFInfo
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- CN209612647U CN209612647U CN201920167001.3U CN201920167001U CN209612647U CN 209612647 U CN209612647 U CN 209612647U CN 201920167001 U CN201920167001 U CN 201920167001U CN 209612647 U CN209612647 U CN 209612647U
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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
- 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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model relates to a kind of magnesite shaft furnace flue gas NO_x Reduction by Effective equipment, including level-one SCR reactor, second level SCR reactor, flue gas heat-exchange unit and combustion furnace, the cold medium entrance of flue gas heat-exchange unit is connected with gas approach, the cold medium outlet of flue gas heat-exchange unit is connected with the inlet air stack towards level-one SCR reactor air inlet, outlet flue is connected between second level SCR reactor gas outlet and the thermal medium entrance of flue gas heat-exchange unit, the thermal medium outlet of flue gas heat-exchange unit is connected with exhaust pass；The air distribution flue towards combustion furnace is connected to by inlet air stack, the hot-blast outlet of combustion furnace is connected with the air return flues for returning to inlet air stack；Ammonia water spray point is provided on inlet air stack and transition flue duct.The utility model will carry out the processing of SCR reaction denitration after flue gas to suitable temperature, operating cost is low, high financial profit, and the flue gas of non-denitration is rationally given using the temperature of neat stress, reduces thermal loss, effectively improves capacity usage ratio.
Description
Technical field
The utility model relates to a kind of magnesite shaft furnace flue gas NO_x Reduction by Effective equipment.
Background technique
There are following three features for magnesite shaft furnace flue gas: (1) nitrous oxides concentration is high, and flue gas is in golden yellow；(2) flue gas
Water content is low；(3) flue gas oxygen content is high.
Magnesite shaft furnace Gas Parameters:
Popular flue-gas denitration process method in the world at present, main selective catalytic reduction method (SCR), selection
Property noncatalytic reduction (SNCR) and low-temperature oxidation (ozone/wet oxidation) denitrification apparatus etc..SCR reaction temperature is 320~400
DEG C, SNCR reaction temperature is required at 850~1150 DEG C, and wet denitration can react under the conditions of temperature is lower than 80 DEG C.Although magnesite
Mine shaft furnace flue-gas temperature is slightly above 90 DEG C, but too high using the operating cost of wet process oxidation technology and ozonation technology, by-product
Object is not easy to dispose.
Utility model content
In view of this, the purpose of the utility model is to provide a kind of operating cost is low, the high magnesite shaft furnace of denitration efficiency
Flue gas NO_x Reduction by Effective equipment.
The utility model is realized using following scheme: a kind of magnesite shaft furnace flue gas NO_x Reduction by Effective equipment, including level-one SCR
Reactor, second level SCR reactor, flue gas heat-exchange unit and combustion furnace, the cold medium entrance of flue gas heat-exchange unit are connected with towards shaft furnace
The cold medium outlet of the gas approach of exhanst gas outlet, flue gas heat-exchange unit is connected with the air inlet towards level-one SCR reactor air inlet
Flue is connected with transition flue duct, second level SCR reactor between level-one SCR reactor gas outlet and second level SCR reactor air inlet
Outlet flue is connected between gas outlet and the thermal medium entrance of flue gas heat-exchange unit, the thermal medium outlet of flue gas heat-exchange unit is connected with
Towards the exhaust pass of chimney；The air distribution flue towards combustion furnace is connected to by inlet air stack, the hot-blast outlet of combustion furnace is connected with
Return to the air return flues of inlet air stack；Ammonia water spray point is provided on inlet air stack and transition flue duct.
Further, it is provided with multi-layer catalyst layer in the level-one SCR reactor and second level SCR reactor, be located at
Rectifier is provided with above top layer's catalyst layer.
Further, it is connected with reflux flue between the exhaust pass and gas approach, is arranged on the reflux flue
There is reflux blower；Air distribution blower is provided on the air distribution flue.
Further, the ammonia water spray point is connect through liquid supply pipe with the tank used for storing ammonia equipped with 20% ammonium hydroxide, is set on liquid supply pipe
It is equipped with aqua ammonia pump and adjusts measuring equipment.
Compared with prior art, the utility model has the following beneficial effects: the utility model denitration device magnesite is perpendicular
Kiln will carry out the processing of SCR reaction denitration after flue gas to suitable temperature, operating cost is low, high financial profit, a part
Flue gas rationally utilizes the temperature of neat stress to improve to the flue gas of non-denitration and dilution by the blower reflux inlet flue that flows back
Reaction efficiency reduces thermal loss, effectively improves the denitration efficiency of capacity usage ratio and device.
For the purpose of this utility model, technical solution and advantage is more clearly understood, specific embodiment will be passed through below
And relevant drawings, the utility model is described in further detail.
Detailed description of the invention
Fig. 1 is the utility model embodiment organigram；
Figure label explanation: 100- level-one SCR reactor, 110- catalyst layer, 120- rectifier, 200- second level SCR are anti-
Answer device, 300- flue gas heat-exchange unit, 310- gas approach, 320- inlet air stack, 330- outlet flue, 340- exhaust pass, 341-
Air-introduced machine, 350- reflux flue, 351- reflux blower, 400- combustion furnace, 410- air distribution flue, 411- air distribution blower, 420- are returned
Wind and smoke road, 500- transition flue duct, 600- ammonia water spray point, 700- tank used for storing ammonia, 710- liquid supply pipe, 711- aqua ammonia pump, 712- tune
Save measuring equipment, 800- chimney.
Specific embodiment
As shown in Figure 1, a kind of magnesite shaft furnace flue gas NO_x Reduction by Effective equipment, including level-one SCR reactor 100, second level SCR
Reactor 200, flue gas heat-exchange unit 300 and combustion furnace 400, the cold medium entrance of flue gas heat-exchange unit 300 are connected with towards shaft furnace cigarette
The cold medium outlet of the gas approach 310 of gas outlet, flue gas heat-exchange unit 300 is connected with towards level-one SCR reactor air inlet
Inlet air stack 320 is connected with transition flue duct between 200 air inlet of 100 gas outlet of level-one SCR reactor and second level SCR reactor
Outlet flue 330, cigarette are connected between 200 gas outlet of 500, second level SCR reactor and the thermal medium entrance of flue gas heat-exchange unit 300
The thermal medium outlet of gas heat exchanger is connected with the exhaust pass 340 towards chimney；It is connected to by inlet air stack 320 towards combustion furnace
400 air distribution flue 410, the hot-blast outlet of combustion furnace are connected with the air return flues 420 for returning to inlet air stack；Inlet air stack and mistake
It crosses on flue and is provided with ammonia water spray point 600, ammonia water spray point 600 uniformly sprays ammonium hydroxide；The utility model magnesite shaft furnace
Flue gas NO_x Reduction by Effective equipment carries out SCR denitration transformation, and flue gas is reheated by flue gas heat-exchange unit and combustion furnace and improves temperature
The suitable temperature reacted to SCR；The exhanst gas outlet of denitration device magnesite shaft furnace draws cigarette receiving gas, the exhanst gas outlet of magnesite shaft furnace
It is provided with bag filter；The flue gas attracted passes through flue gas heat-exchange unit first makes flue-gas temperature be increased to 150 DEG C or so, then draws
Part of smoke is heated to after 500 DEG C being mixed into flue gas of the temperature at 330 DEG C or so with former flue gas again by combustion furnace out, then
SCR reactor is mixed into ammonia and carries out denitration process, and the neat stress temperature after denitration process returns to cigarette at 280 DEG C or so
Gas heat exchanger is cooled to 140 DEG C or so and drains into chimney, rationally the flue gas using the temperature of neat stress to non-denitration and dilution
Reaction efficiency is improved, thermal loss is reduced, effectively improves the denitration efficiency of capacity usage ratio and device.
Denitration reaction principle wherein in SCR reactor is as follows:
4NO+4NH3+ O2 → 4N2+ 6H2O
2NO2+ 4NH3+ O2 → 3N2+ 6H2O
In the present embodiment, multilayer catalysis is provided in the level-one SCR reactor 100 and second level SCR reactor 200
Oxidant layer 110 is provided with rectifier 120, height in the catalyst choice in catalyst layer 110 above top layer's catalyst layer
Warm catalyst has good adaptability and activity；By two-stage denitration process, final denitration efficiency be not less than 98%, and
Operating cost is low, good in economic efficiency.
In the present embodiment, be connected between the exhaust pass 310 and gas approach 340 reflux flue 350, described time
It is provided with reflux blower 351 on flow flue 350, is carried out by reflux flue 350 using flue gas of the part neat stress to non-denitration
Dilution, can effectively improve denitration process effect, and can improve to a certain extent into the flue gas between flue gas heat-exchange unit
Temperature is further reduced thermal loss.
In the present embodiment, it is provided with air distribution blower 411 on the air distribution flue 410, reflux cigarette is located on exhaust pass
Pipeline between road 340 and chimney 800 is provided with air-introduced machine 341.
In the present embodiment, the ammonia water spray point 600 connects through liquid supply pipe 710 and the tank used for storing ammonia 700 equipped with 20% ammonium hydroxide
It connects, aqua ammonia pump 711 is provided on liquid supply pipe and adjusts measuring equipment 712, adjusting measuring equipment 712 is that flowmeter and flow are adjusted
Valve；Liquid supply pipe forms Liang Ge branch and is connected respectively with ammonia water spray point 600 on both inlet air stack and transition flue duct, and supplies
It is respectively arranged with adjusting measuring equipment 712 in the Liang Ge branch of liquid pipe and reaches saving in order to according to circumstances adjust ammonium hydroxide flow
The purpose of material；Reducing agent using 20% ammonia spirit as denitration device, flue gas under high temperature environment, NOx in flue gas and
The ammonia sprayed into through ammonia water spray point is mixed, and denitration reaction occurs after catalyst, completes denitrification process；Ammonia water spray point
It being made of double-current spray gun body and smoke deflector, smoke deflector is also disposed on exhaust pass, ammonium hydroxide becomes ammonia after spraying,
Ammonia is mixed with flue gas；Ammonium hydroxide transports plant area by groove tank car, the fluid injection into tank used for storing ammonia by discharging pumping plant, to avoid in tank
Breather valve is installed in over-voltage or vacuum, tank top.
In the present embodiment, natural gas, coal gas, heavy oil etc. can be used in the fuel of combustion furnace 400, passes through direct combustion system
Low-temperature flue gas is heated in flue, enough measuring point stub (tube)s are set on flue, convenient for being carried out in trial operation and operation
Measurement (temperature measurement and sampling).
The course of work of the magnesite shaft furnace flue gas NO_x Reduction by Effective equipment: (1) flue gas of the gas approach from magnesite shaft furnace
Draw cigarette receiving gas in outlet；(2) flue gas that gas approach attracts makes flue-gas temperature be increased to 140 ~ 170 DEG C by flue gas heat-exchange unit 300
Enter inlet air stack afterwards；(3) part of smoke that air distribution flue 410 is drawn in inlet air stack 320 is heated to 480 by combustion furnace
It is mixed into the flue gas that temperature is 320 ~ 350 DEG C or so after ~ 520 DEG C with the flue gas in inlet air stack 320 again；(4) flue gas and ammonia
Enter level-one SCR reactor 100 after mixing and carry out denitration process, flue-gas temperature is 300 ~ 320 DEG C at this time；(5) anti-through level-one SCR
It answers the flue gas of device denitration process to enter second level SCR reactor 200 and carries out denitration process, flue-gas temperature is 280 ~ 310 DEG C at this time；
(6) neat stress after denitration process enters flue gas heat-exchange unit and cools down heel row to chimney, and the temperature of the neat stress in exhaust pass is
130~160℃。
In the present embodiment, reflux flue 350 draws the cigarette in part of smoke and gas approach in exhaust pass 340
Gas enters flue gas heat-exchange unit after being mixed.
Above-mentioned any technical solution disclosed in the utility model unless otherwise stated, if it discloses numberical range,
So disclosed numberical range is preferred numberical range, and any it should be appreciated by those skilled in the art preferred numerical value
Range is only the numerical value that technical effect is obvious or representative in many enforceable numerical value.Since numerical value is more,
It is impossible to exhaust, so the utility model discloses component values just to illustrate the technical solution of the utility model, also, above-mentioned
The numerical value enumerated should not constitute the limitation that protection scope is created to the utility model.
If the utility model is open or relates to the components or structural member of connection fastened to each other, except as otherwise sound
It is bright outer, it is fixedly connected it is to be understood that connection (such as using bolt or screw connection) can be removedly fixed, can also manage
Solution are as follows: it is non-removable to be fixedly connected with (such as riveting, welding), certainly, connection fastened to each other or integral structure (
Such as manufactured using casting technique is integrally formed) replaced (obviously can not be using except integrally formed technique).
In addition, for indicating positional relationship or shape applied in above-mentioned any technical solution disclosed by the utility model
Term its meaning includes approximate with its, similar or close state or shape unless otherwise stated.
Either component provided by the utility model by multiple individual component parts either assembled, or
The separate part that integrally formed technique manufactures.
Finally it should be noted that: above embodiments are only to illustrate the technical solution of the utility model rather than limit it
System；Although the utility model has been described in detail with reference to the preferred embodiment, those of ordinary skill in the art should
Understand: specific implementation of the utility model can still be modified or is equally replaced to some technical characteristics
It changes；Without departing from the spirit of technical solutions of the utility model, should all cover in the claimed technical solution of the utility model
In range.
Claims (4)
1. a kind of magnesite shaft furnace flue gas NO_x Reduction by Effective equipment, it is characterised in that: reacted including level-one SCR reactor, second level SCR
Device, flue gas heat-exchange unit and combustion furnace, the cold medium entrance of flue gas heat-exchange unit are connected with the gas approach towards shaft furnace exhanst gas outlet,
The cold medium outlet of flue gas heat-exchange unit is connected with the inlet air stack towards level-one SCR reactor air inlet, and level-one SCR reactor goes out
It is connected with transition flue duct between port and second level SCR reactor air inlet, second level SCR reactor gas outlet and flue gas heat-exchange unit
Outlet flue is connected between thermal medium entrance, the thermal medium outlet of flue gas heat-exchange unit is connected with the exhaust pass towards chimney；
The air distribution flue towards combustion furnace is connected to by inlet air stack, the hot-blast outlet of combustion furnace is connected with the return air cigarette for returning to inlet air stack
Road；Ammonia water spray point is provided on inlet air stack and transition flue duct.
2. magnesite shaft furnace flue gas NO_x Reduction by Effective equipment according to claim 1, it is characterised in that: the level-one SCR is anti-
It answers in device and second level SCR reactor and is provided with multi-layer catalyst layer, rectification is provided with above top layer's catalyst layer
Device.
3. magnesite shaft furnace flue gas NO_x Reduction by Effective equipment according to claim 1, it is characterised in that: the exhaust pass with
It is connected with reflux flue between gas approach, is provided with reflux blower on the reflux flue；It is provided on the air distribution flue
Air distribution blower.
4. magnesite shaft furnace flue gas NO_x Reduction by Effective equipment according to claim 1, it is characterised in that: the ammonia water spray point
It is connect through liquid supply pipe with the tank used for storing ammonia equipped with 20% ammonium hydroxide, aqua ammonia pump is provided on liquid supply pipe and adjusts measuring equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920167001.3U CN209612647U (en) | 2019-01-31 | 2019-01-31 | Magnesite shaft furnace flue gas NO_x Reduction by Effective equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920167001.3U CN209612647U (en) | 2019-01-31 | 2019-01-31 | Magnesite shaft furnace flue gas NO_x Reduction by Effective equipment |
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| Publication Number | Publication Date |
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| CN209612647U true CN209612647U (en) | 2019-11-12 |
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| CN201920167001.3U Active CN209612647U (en) | 2019-01-31 | 2019-01-31 | Magnesite shaft furnace flue gas NO_x Reduction by Effective equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109569294A (en) * | 2019-01-31 | 2019-04-05 | 福建鑫泽环保设备工程有限公司 | Magnesite shaft furnace flue gas NO_x Reduction by Effective equipment and its technique |
| CN112179153A (en) * | 2020-09-16 | 2021-01-05 | 东北大学 | Denitration method for sintering magnesia calcining flue gas |
| CN114653182A (en) * | 2022-03-28 | 2022-06-24 | 山东一然环保科技有限公司 | Energy-conserving high-efficient compound denitration device |
-
2019
- 2019-01-31 CN CN201920167001.3U patent/CN209612647U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109569294A (en) * | 2019-01-31 | 2019-04-05 | 福建鑫泽环保设备工程有限公司 | Magnesite shaft furnace flue gas NO_x Reduction by Effective equipment and its technique |
| CN112179153A (en) * | 2020-09-16 | 2021-01-05 | 东北大学 | Denitration method for sintering magnesia calcining flue gas |
| CN114653182A (en) * | 2022-03-28 | 2022-06-24 | 山东一然环保科技有限公司 | Energy-conserving high-efficient compound denitration device |
| CN114653182B (en) * | 2022-03-28 | 2023-11-28 | 山东一然环保科技有限公司 | Energy-saving efficient composite denitration device |
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