CN205965464U - Desulphurization of exhaust gas denitration ultra -clean dust removal integrated device - Google Patents
Desulphurization of exhaust gas denitration ultra -clean dust removal integrated device Download PDFInfo
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- CN205965464U CN205965464U CN201620853580.3U CN201620853580U CN205965464U CN 205965464 U CN205965464 U CN 205965464U CN 201620853580 U CN201620853580 U CN 201620853580U CN 205965464 U CN205965464 U CN 205965464U
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Abstract
The utility model discloses a desulphurization of exhaust gas denitration ultra -clean dust removal integrated device, it includes the synchronous SOx/NOx control district and the district of removing dust to absorb the gas wash tower, waste gas access connection oxidation reactor, oxidation reactor connects reduction reactor, reduction reactor connects the absorption gas wash tower, the side of absorbing the gas wash tower is equipped with the alkali lye district, the circulation fluid treatment region sets up in the lower part of absorbing the gas wash tower, circulation fluid treatment region top is equipped with synchronous SOx/NOx control district, remove dust and distinguish the top that sets up in synchronous SOx/NOx control district, it is equipped with electrostatic precipitator to remove dust to distinguish, dust removal district top is equipped with exhaust outlet. The utility model discloses the advantage lies in: it is integrated to have realized that the SOx/NOx control ultra -clean removes dust, takes up an area of fewly, the cost is few, low running cost. Application range is wide, both has been adapted to the grassroot project, and it is with the obvious advantage also to be applicable to the project that the off -the -shelf item carried mark transformation, especially land used nervous.
Description
Technical field
This utility model is related to a kind of desulphurization denitration and purifying and dedusting device, and more particularly, to a kind of exhuast gas desulfurization denitration is ultra-clean
Dust removal integrated plant, belongs to combustion products process field.
Background technology
Waste gas PM2.5 is the main cause of atmospheric haze.Nitrogen oxides are the main causes causing chemical fumes, are also acid
The major reason of rain.Sulfur dioxide is the main cause of acid rain.The ultra-clean dedusting of waste gas, desulfurization and denitration are three of waste gas pollution control and treatment
Vital task.
Waste gas dedusting method mainly has cyclone dust removal, earthenware dedusting, water bath dust-removing, bag-type dust, dry type static dust
And wet static dedusting.Cyclone dust removal utilizes centrifugal dust removal, can only remove big dust particle, and outlet particle concentration is generally only
500-800mg/Nm can be reached3.Earthenware dedusting is physics dedusting, and the particulate matter in waste gas is transferred in water by water bath dust-removing,
Earthenware and water bath dust-removing can only remove PM50, and outlet particle concentration can only achieve 200-300mg/Nm3.Bag-type dust utilizes
The filtration dedusting of cloth bag, main removal PM10 and PM2.5, outlet particle concentration is normally controlled in 30-50mg/Nm3.Dry
Formula electrostatic precipitation utilizes the chargeding performance of particulate matter in dry waste gas, is driven by high-voltage electrostatic field and is enriched with dedusting in anode, mainly
Remove PM10, outlet particle concentration is normally controlled in 50-100mg/Nm3.PM2.5 is superfine particulate matter, and charge capacity is poor,
Grain is not more than 2.5 μm.Wet static dedusting carries out water spray humidification first to waste gas, makes the vapor in waste gas reach supersaturation shape
State, greatly increases the charging performance of superfine particulate matter, then removes superfine particulate matter by high-voltage electrostatic field, main removal
PM2.5, outlet particle concentration can reach 5mg/Nm3Below.Cloth bag and dry type static dust outlet particulate matter are dense in theory
Degree can reach 5mg/Nm3Hereinafter, but load rate of plant reduces at double, pressure drop is excessive, and power consumption is too high, operating cost mistake
High.Particulate matter requires generally to adopt combination technique when reaching ultra-clean discharge, removes big using earthenware dedusting, water bath dust-removing etc.
Grain thing, removes PM10 using dry type static dust, bag-type dust, removes PM2.5 using wet static dedusting.Wet static dedusting
It is the usual technique of ultra-clean dedusting and last guarantee.
Desulfurizing method of exhaust gas mainly has dry type, half dry type and wet type desulfurizing.Dry type desulfurizing feeding lime stone, magnesium oxide etc. are done
Powder desulfurizing agent, directly with waste gas sulfur dioxide react and generate the dry products such as calcium sulfite, magnesium sulfite, then dedusting.Half
The desulfurizer slurries such as dry type desulfurizing feeding lime, magnesium oxide, sodium hydroxide, directly react generation Asia with the sulfur dioxide in waste gas
The dry products such as calcium sulfate, magnesium sulfite, then dedusting.Dry type, the advantage of half dry type desulfurization are not need water, there is not pulp water and divide
From with water recycle problem；Shortcoming is to react not thorough, and efficiency is low, is required for dedusting before and after desulfurization, and repeated construction is serious,
Pressure drop is big, and operating cost is high.Wet type desulfurizing sprays waste gas with doctor solution first, and the sulfur dioxide in waste gas is transferred to shape in water
Become sulfurous acid, then the acid doctor solution of the neutralization such as feeding lime, magnesium oxide, sodium hydroxide, doctor solution follows after slag-liquid separation
Ring uses.The advantage of wet type desulfurizing is that sulfur dioxide transfer velocity is fast, efficiency high, and effect is good；Shortcoming is to consume water, and doctor solution needs
Want slag-liquid separation and recycle.Generally adopt wet type desulfurizing at present, seldom adopt dry type and half dry type desulfurization.
Main flow denitration technology mainly selective catalytic reduction method (SCR) and SNCR method (SNCR).Its
His technology mainly has electronic beam method (EBA), activated coke absorption, normal temperature oxidation reducing process etc..SCR law technology is in catalyst action
Under, reducing agent NH3NO in (liquefied ammonia, ammonia, carbamide etc.) and flue gasXReaction, by the NO in flue gasXIt is reduced to nitrogen and water.Its
Reactor is arranged between boiler economizer outlet and air preheater entrance, and reaction temperature is typically between 320 DEG C -400 DEG C.
SNCR law technology NH3, the reducing agent such as carbamide spray into the region that in-furnace temperature is 850～1100 DEG C, in reducing agent and flue gas
NOxCarry out selective reaction, NOxIt is reduced to nitrogen and water.SCR and SNCR technology be required for specific reaction temperature condition and
Strict automatically controls, and reducing agent is not enough, and reaction is not thorough, and instead excess generation the escaping of ammonia increases nitrogen oxides, results in process
Effect reduces.Electronic beam method utilizes the high energy particle that electron accelerator produces to irradiate flue gas so as to SO2And NOxOxidation generates sulphuric acid
And nitric acid, then react generation ammonium sulphate and nitric acid ammonia with the ammonia adding.This technology does not have waste water it is not necessary to catalyst, to flue gas
Condition changes strong adaptability, but power consumption is big, is not also suitable for large-scale application.Active coke absorption method carries out cigarette with activated coke
Desulfurization and denitrogenation while gas.SO2Adsorbed by activated coke, by hot recycling, product is converted into the pairs such as sulfur, sulphuric acid, chemical fertilizer
Product.NOXIt is under conditions of ammonification, the catalytic action through activated coke generates water and nitrogen enters air again.This technology does not have
Waste water, it is not necessary to catalyst, changes strong adaptability to flue gas condition, but operation is more complicated, and side-product produces complicated, carbon consumption
Greatly, tower pressure drop is big.NO is first oxidized to NO by normal temperature oxidation reducing process2, then by NO2Transfer to and in water, become HNO3, finally utilize
H2SO3By HNO3It is reduced into N2Discharge.This technical matters process similar with desulfurization it is not necessary to reducing agent, flue gas condition is changed
, moreover it is possible to the noxious substance such as simultaneous oxidation two English and remove removing heavy metals etc., operating cost is low for strong adaptability, difficult point be oxidation and
The control of reduction.
Because technique limits, the denitration such as SCR, SNCR, activated coke absorption synchronously can not possibly be carried out with desulfurization, and both can only make
For separate unit it is impossible to realize technique and the integration of device, floor space is big, and investment is many, and operating cost is high.Only several
Normal temperature oxidation reduction denitration example is also all independent denitration after desulfurization, there is a problem of same.Electronic beam method denitration needs
Produce high energy particle using electron accelerator, energy consumption is very big, is difficult to commercial production.
Wet type desulfurizing and normal temperature oxidation reduce denitrating technique by the way of spray-absorption liquid by the sulfur dioxide in waste gas
Transfer to oxidation product nitrogen dioxide and in water, form sulfurous acid and nitric acid, acid is neutralized using Calx, magnesium oxide, sodium hydroxide etc.
Property absorbing liquid, produce a large amount of water smokes during spray, in water smoke contain the product such as a large amount of sulphite, sulfate, nitrate,
Need to process further.Generally processed using flap demister.This demister efficiency is low, and effect is poor, water droplet in waste gas
Concentration still reaches 70-100mg/Nm3, particle concentration still reaches 30-100mg/Nm3It is difficult to reach ultra-clean discharge standard.
In order to reach ultra-clean discharge standard, generally wet electrostatic is set after wet type desulfurizing and normal temperature oxidation reduction denitration
Dedusting.Due to the restriction of technique, the waste gas of wet type desulfurizing and normal temperature oxidation reduction denitration can only bottom-up flow.Quiet in wet type
In electric precipitation, the moisture film that anode contains particulate matter relies on gravity from up to down to flow；Flowing in order to ensure moisture film is smooth, air-flow side
To being usually designed to downwards or level.Because wet type desulfurizing is different from the airflow direction of wet static dedusting, both only as
, it is impossible to realize technique and the integration of device, floor space is big for separate unit, and investment is many, and pressure drop is big.
Utility model content
The purpose of this utility model is to overcome weak point in prior art, and provides a kind of wet type desulfurizing technology, often
Warm oxidoreduction denitration technology and wet static dedusting technology combine, and define the ultra-clean dust removal integrated dress of exhuast gas desulfurization denitration
Put, exhuast gas desulfurization, denitration, ultra-clean dedusting, hazardous contaminant process etc. are carried out in set of device, substantially increase waste gas and take off
Effect and efficiency that sulfur, denitration, ultra-clean dedusting, hazardous contaminant are processed, greatly reduce investment, operating cost and occupation of land
Area.
The ultra-clean dust removal integrated plant of this exhuast gas desulfurization denitration, absorbs gas wash tower and includes synchronized desulfuring and denitrifying area and dedusting
Area, exhaust gas inlet connects oxidation reactor, oxidation reactor connects reduction reactor, reduction reactor connects absorption gas wash tower,
The side absorbing gas wash tower is provided with alkali liquor area, and circulation fluid treatment region is arranged on the bottom absorbing gas wash tower, on circulation fluid treatment region
Side is provided with synchronized desulfuring and denitrifying area, and dedusting area is arranged on the top in synchronized desulfuring and denitrifying area, is provided with waste gas outlet above dedusting area.
Described electrostatic precipitator is made up of high-voltage DC power supply, polar curve, pole plate and deflector, is provided between two two-plates
Polar curve, polar curve connects high-voltage DC power supply, and deflector is arranged on the top of dedusting area, and the bottom of waste gas outlet.
Described circulation fluid treatment region side is provided with dope elevator pump, and circulation fluid treatment region is upper with synchronized desulfuring and denitrifying area
Be provided with circulating pump between side, below alkali liquor area and synchronized desulfuring and denitrifying area between be provided with dosing pump.
It is additionally added strong acid in described reduction reactor.
This utility model advantage is：
1. integration, oxidation of nitric oxide, sulfur dioxide absorb, nitrogen dioxide absorbs, nitrogen dioxide absorption product reduces,
Hazardous contaminant oxidation and the ultra-clean dedusting of exhaust gas particle thing, in soda acid, slag-liquid separation and water recycle etc. a set of
Complete in facility it is achieved that desulphurization denitration is ultra-clean dust removal integrated.
2. take up an area few, desulphurization denitration is ultra-clean dust removal integrated, save floor space 50-60%；
3. cost is few, saves cost 25-30%；
4. operating cost is low, saves operating cost 20-25%；
5. range is wide, is not only applicable to grassroot project, is also applied for off-the-shelf item and proposes mark transformation, especially land used is nervous
Project with the obvious advantage.
Brief description
Fig. 1 is the structural representation of the ultra-clean dust removal integrated plant of exhuast gas desulfurization denitration.
In figure labelling：：1- oxidation reactor, 2- reduction reactor, 3- high-voltage DC power supply, 4- polar curve, 5- pole plate, 6- lead
Stream plate, 7- absorb gas wash tower, 8- dosing pump, 9- circulating pump, 10- dope elevator pump, 11- exhaust gas inlet, the process of 12- circulation fluid
Area, 13- alkali liquor area, 14- synchronized desulfuring and denitrifying area, 15- dedusting area, 16- waste gas outlet.
Specific embodiment
To exhuast gas desulfurization denitration, ultra-clean dust removal integrated plant is further described below in conjunction with the accompanying drawings.
The ultra-clean dust removal integrated plant of this exhuast gas desulfurization denitration, absorbs gas wash tower 7 and includes synchronized desulfuring and denitrifying area 14 He
Dedusting area 15, exhaust gas inlet 11 connects oxidation reactor 1, oxidation reactor 1 connects reduction reactor 2, reduction reactor 2 connects
Absorb gas wash tower 7, the side absorbing gas wash tower 7 is provided with alkali liquor area 13, circulation fluid treatment region 12 is arranged under absorption gas wash tower 7
Portion, is provided with synchronized desulfuring and denitrifying area 14 above circulation fluid treatment region 12, dedusting area 15 is arranged on the upper of synchronized desulfuring and denitrifying area 14
Side, dedusting area 15 is provided with electrostatic precipitator, is provided with waste gas outlet 16 above dedusting area 15.Described electrostatic precipitator is by high straightening
Stream power supply 3, polar curve 4, pole plate 5 and deflector 6 form, and are provided with polar curve 4 between two two-plates 5, and polar curve 4 connects high-voltage DC power supply
3, deflector 6 is arranged on the top of dedusting area 15, and the bottom of waste gas outlet 16.
Described circulation fluid treatment region 12 side is provided with dope elevator pump 10, circulation fluid treatment region 12 and synchronized desulfuring and denitrifying
It is provided with circulating pump 9 between the top in area 14, between alkali liquor area 13 and synchronized desulfuring and denitrifying area 14 lower section, be provided with dosing pump 8.
It is additionally added strong acid in described reduction reactor 2.
Specifically wet type desulfurizing technology, normal temperature oxidation reduction denitration technology and wet static dedusting technology combine, and are formed
Exhuast gas desulfurization denitration ultra-clean dust removal integrated plant, exhuast gas desulfurization, denitration, ultra-clean dedusting, hazardous contaminant are processed etc.
Carry out in set of device, substantially increase exhuast gas desulfurization, denitration, ultra-clean dedusting, the effect of hazardous contaminant process and effect
Rate, greatly reduces investment, operating cost and floor space.
Waste gas first passes through exhaust gas inlet 11 and enters oxidation reactor 1 by Viability for inertia oxidation of nitric oxide product, so
Enter reduction reactor 2 afterwards and nitric oxide bioactivity product is reduced into nitrogen, waste gas subsequently enters absorption gas wash tower 7, dosing pump 8
Bottom alkali liquor uniformly being sprayed absorption gas wash tower 7 carries out acid-base neutralization, and circulation fluid is uniformly sprayed absorption and removes by circulating pump 9
The top of chimney 7 absorbs soluble gas, and waste gas continuously rises to dedusting after absorbing the synchronized desulfuring and denitrifying area 14 of gas wash tower 7
Area 15, high-voltage DC power supply 3 high-voltage DC power supply is dispensed into polar curve 4, and polar curve 4 electric discharge promotes water smoke and particulate matter to move to pole plate
5 formation moisture films, moisture film falls synchronized desulfuring and denitrifying area 14 along pole plate 5 flower, and water smoke and particulate matter are removed, and purify waste gas discharge；
Circulation fluid falls into circulation fluid treatment region 12, and circulation fluid treatment region 12 supernatant continues cycling through use, circulation fluid treatment region 12 dope
Processed facility is sent to by dope elevator pump 10.
Oxidation of nitric oxide, sulfur dioxide absorb, nitrogen dioxide absorbs, nitrogen dioxide absorption product reduces, poisonous and harmful
In pollutant oxidation and the ultra-clean dedusting of exhaust gas particle thing, soda acid, slag-liquid separation and water recycle etc. complete in a set of facility
Become.
The present embodiment exhaust gas flow 350000Nm3/ h, reaction tower diameter 6.4m, high 26.8m；Inlet exhaust sulfur dioxide is dense
Degree 600-700mg/Nm3, nitrous oxides concentration 200-300mg/Nm3, particle concentration 50-120mg/Nm3, outlet exhaust dioxy
Change sulphur concentration 15-20mg/Nm3, nitrous oxides concentration 20-30mg/Nm3, particle concentration 1-3mg/Nm3, all reach ultra-clean discharge
Standard.
Claims (4)
1. the ultra-clean dust removal integrated plant of a kind of exhuast gas desulfurization denitration, absorbs gas wash tower (7) and includes synchronized desulfuring and denitrifying area (14)
With dedusting area (15) it is characterised in that：Exhaust gas inlet (11) connects oxidation reactor (1), oxidation reactor (1) connects reduction instead
Answer device (2), reduction reactor (2) to connect and absorb gas wash tower (7), the side absorbing gas wash tower (7) is provided with alkali liquor area (13), circulation
Liquid treatment region (12) is arranged on the bottom absorbing gas wash tower (7), and circulation fluid treatment region is provided with synchronized desulfuring and denitrifying area above (12)
(14), dedusting area (15) are arranged on the top of synchronized desulfuring and denitrifying area (14), and dedusting area (15) are provided with electrostatic precipitator, dedusting area
(15) it is provided with waste gas outlet (16) above.
2. the ultra-clean dust removal integrated plant of exhuast gas desulfurization denitration according to claim 1 it is characterised in that：Described electrostatic
Cleaner unit is made up of high-voltage DC power supply (3), polar curve (4), pole plate (5) and deflector (6), and two two-plates are provided with pole between (5)
Line (4), polar curve (4) connects high-voltage DC power supply (3), and deflector (6) is arranged on the top of dedusting area (15), and waste gas outlet
(16) bottom.
3. the ultra-clean dust removal integrated plant of exhuast gas desulfurization denitration according to claim 1 it is characterised in that：Described circulation
Liquid treatment region (12) side is provided with dope elevator pump (10), the top in circulation fluid treatment region (12) and synchronized desulfuring and denitrifying area (14)
Between be provided with circulating pump (9), below alkali liquor area (13) and synchronized desulfuring and denitrifying area (14) between be provided with dosing pump (8).
4. the ultra-clean dust removal integrated plant of exhuast gas desulfurization denitration according to claim 1 it is characterised in that：Described reduction
Reactor is additionally added strong acid in (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620853580.3U CN205965464U (en) | 2016-08-08 | 2016-08-08 | Desulphurization of exhaust gas denitration ultra -clean dust removal integrated device |
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| CN201620853580.3U CN205965464U (en) | 2016-08-08 | 2016-08-08 | Desulphurization of exhaust gas denitration ultra -clean dust removal integrated device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106064016A (en) * | 2016-08-08 | 2016-11-02 | 辽宁信威环保科技有限公司 | The ultra-clean dust removal integrated plant of exhuast gas desulfurization denitration |
| CN110252059A (en) * | 2019-06-14 | 2019-09-20 | 苏州市协力环保设备有限公司 | Fiberboard dry waste gas processing system and fiberboard dry waste gas treatment process |
-
2016
- 2016-08-08 CN CN201620853580.3U patent/CN205965464U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106064016A (en) * | 2016-08-08 | 2016-11-02 | 辽宁信威环保科技有限公司 | The ultra-clean dust removal integrated plant of exhuast gas desulfurization denitration |
| CN110252059A (en) * | 2019-06-14 | 2019-09-20 | 苏州市协力环保设备有限公司 | Fiberboard dry waste gas processing system and fiberboard dry waste gas treatment process |
| CN110252059B (en) * | 2019-06-14 | 2021-08-27 | 苏州市协力环保设备有限公司 | Fiberboard drying waste gas treatment system and fiberboard drying waste gas treatment process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Liaoning Fenghua Industrial Co., Ltd. Assignor: Liaoning Xinwei Environmental Protection Technology Co. Ltd. Contract record no.: 2017210000033 Denomination of utility model: Waste gas desulfurization, denitration and ultra-clean dust removal integrated apparatus Granted publication date: 20170222 License type: Common License Record date: 20171108 Assignee: Dashiqiao Xinwei Refractory Material Co.,Ltd. Assignor: Liaoning Xinwei Environmental Protection Technology Co. Ltd. Contract record no.: 2017210000032 Denomination of utility model: Waste gas desulfurization, denitration and ultra-clean dust removal integrated apparatus Granted publication date: 20170222 License type: Common License Record date: 20171108 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170222 Termination date: 20200808 |
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| CF01 | Termination of patent right due to non-payment of annual fee |