CN1085120A - The method and the chimney that are used for condensation and purifying combustion gas - Google Patents
The method and the chimney that are used for condensation and purifying combustion gas Download PDFInfo
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- CN1085120A CN1085120A CN92111340A CN92111340A CN1085120A CN 1085120 A CN1085120 A CN 1085120A CN 92111340 A CN92111340 A CN 92111340A CN 92111340 A CN92111340 A CN 92111340A CN 1085120 A CN1085120 A CN 1085120A
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- Prior art keywords
- burnt gas
- chimney
- gas
- water
- descending
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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
- Y02E20/32—Direct CO2 mitigation
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind ofly be used to condense, the method and the chimney of purifying combustion waste gas, can be used as a kind of anti-pollution means and be used for incinerator and chemical plant.
Description
The present invention relates to a kind of method and chimney that is used for condensation and purifying combustion waste gas, can be used as a kind of anti-pollution means and be used for incinerator and chemical plant.
Known a kind of chimney is last shower water or the lime aqueous solution to the combustion gas of being emitted by incinerator, by chemistry and physical action purification with cool off said gas.But in the case,, must equip an air blast and also waste gas in this chimney be reheated in order to improve the smoke abatement ability.Therefore, a kind of like this cleaning system of prior art just needs huge equipment investment and operating cost.Therefore, although the configuration of this kind equipment is the ten minutes needs, yet because above-mentioned, in industrial underdeveloped country, a lot of coal-fired power plants does not still have this class cleaning system.
Known another kind of method is a dry method, in the method, injects in this chimney with a kind of top of an electron radiation Shu Congyi vertical stack, collects and remove flue dust and harmful fine grained whereby.But the detergent power of this method is limited, and its equipment investment is the same with wet method with operating cost high.
The purpose of this invention is to provide a kind of can be with the efficient purifying combustion waste gas of cheap apparatus and with its cooling and enter method in the atmosphere, and provide one to be used to implement the required chimney of this method.
The invention provides a kind of device that is used for addressing the above problem, as shown in Figure 1, this device comprises: up-hill line 3, and it is used to guide the burnt gas 2 from burner 1, makes its up charging; A downward-sloping descending pipeline 4, it is connected with up-hill line 3, is used for guiding burnt gas 2 descending chargings; A spray thrower 5, it is used on the whole length of descending pipeline 4 a kind of small droplet (for example water or lime aqueous solution) spray being gone into this pipeline; And a detarred device 6, it is installed in the bottom of descending pipeline, is used for collecting the pollutant and the carbon dioxide that are included in from the flue gas of descending pipeline discharge.
People wish to remove such as SO consumingly now
2And NO
2One class burnt gas is because they are the main causes that form acid rain.A large amount of up to now CO that enter in the atmosphere
2Just causing people's very big concern, i.e. CO
2Very likely make global warming quickly than former estimation.According to the present invention, can make the height (or height of the up-hill line of saying so) of chimney half (this smoke abatement that just means it is very competent) less than upright chimney length.The descending pipeline of this inclination can be with a kind of antirust sheet metal manufacturing.Because this chimney has the overall structure of U-shaped or V-arrangement, so its stable height and cost are low.
In addition, according to the present invention,, therefore can absorb noxious pollutant automatically, naturally owing on the whole length of descending pipeline 4, simply water is sprayed in this pipeline.This spray thrower is simple in structure, and it is made up of a low-power pump and a nozzle that is used to spray water.Its operating cost is low.In addition, the water droplet that has absorbed noxious pollutant also can adhere on the detar device 6 owing to the gravity effect descends, and so just is easy to collect these water droplets.
Narration and the independent accompanying drawing of reference according to hereinafter can make other features of the present invention and purpose all become very clear, wherein:
Fig. 1 is the deep cutting view of an embodiment of condensation cleaning chimney of the present invention.
With reference now to Fig. 1,, chimney wherein comprises a up-hill line 3, and it is same as the burnt gas 2 up chargings that guiding is emitted by burner 1; A descending pipeline 4, it and up-hill line 3 are linked to be integral body, are used to guide the descending charging of burnt gas; A spray thrower 5, it is used on the whole length of the descending pipeline 4 that tilts a kind of liquid (water or lime aqueous solution) spray being gone into this pipeline; And a detar device 6, it is installed in the bottom of descending pipeline 4, is used for collecting the pollutant and the carbon dioxide that are included in flue gas.This detar device 6 contains one group by certain interval (15～20mm) corrugated platings (for example long 1-2m) that are provided with abreast for example.
Said burnt gas 2 purifies by following mode.When fuel burns, produced burnt gas 2 in burner 1.As shown in table 1, this waste gas contains a large amount of water vapours, and this water vapour is owing to the chemical bond between the oxygen in hydrogen atom and the atmosphere generates.
Though burnt gas 2 contains so a large amount of water vapour, because its maintenance at high temperature, so it remains undersaturated.This undersaturated burnt gas 2 is by up-hill line 3 and up.When waste gas 2 entered descending pipeline 4, it just stood the spray quinoline from the fine water droplets of spray equipment 5.Therefore water droplet 7 gasifications that spray seize a large amount of heat from burnt gas 2.The result makes burnt gas promptly cool down and therefore reaches capacity state.When burnt gas 2 has reached saturation state and owing to being further cooled with contacting of water droplet 7, it just is condensed into a kind of tiny water droplet.When the humidity of burnt gas 2 had reached normal water temperature, the major part of the water vapour that generates when fuel combustion just was condensed into a large amount of fine smog.
Meteorological educational circles is thought, when airborne water vapour condensation becomes smog or rain, is suspended in airborne fine flue dust, sea salt particle and ion particles and just plays a kind of core of examining for water droplet.
According to same reason, can think, when being condensed into fine smog in the pipeline (referring to chimney) of a large amount of water vapours a sealing, such as NO
2Or SO
2Formed smog etc. the molecule of hydrophilic gas with regard to the central role that plays water droplet.Even these molecules do not play the effect of water droplet core, also be difficult to their surfaces that can not be formed the fine water droplets of smog of the imagination and absorb.
The smog 8 of condensation and fine water droplets 7 carrier bands that spray pollutant contained in the burnt gas 2 charging downwards by descending pipeline 4.When being in feed state, the collision and their particle diameter is increased mutually of the smog 8 of the fine water droplets of spray 7 and condensation, the result is because the gravity effect makes them land on the inwall of descending pipeline 4 and be rinsed.
Be suspended in ducted any smog and all be brought in the detar device 6, they are condensed and are rinsed herein.Similar through burnt gas 2 present its compositions of handling like this to the composition of surrounding air, return in the atmosphere.
The quantity that is present in the water vapour in the burnt gas 2 is described now.
We will lift one and use propane (C
3H
8) example.For completing combustion 100g propane, will need 364g(255L) oxygen.Need supply with 1.45kg(1212L for this reason) air.The waste gas that produces owing to burning contains 1.09kg nitrogen and 300g carbon dioxide gas and 164g water vapour, heavily is 1.55kg altogether.In other words, this waste gas is equivalent to contain the steam of 118g in 1kg dry air (not comprising steam).As shown in table 2, great changes have taken place with temperature for the content of water vapour (saturated vapor).
The relation of table 2 temperature and steam content
Temperature (℃) saturated vapor content (g/1kg dry air)
10 7.6
20 14.4
30 25.3
40 42.6
60 108
80 244
100 498
As can be seen from Table 2, above-mentioned burnt gas (contain in the 1kg dry air 118 gram steam) is undersaturated under 80 ℃, but when it is cooled to 60 ℃, 10g(118-108=10g will be arranged) water vapour cools off out and forms smog.When further being cooled to 20 ℃, 104g(118-14.4=104g) water recovery forms smog.
A feature of the present invention is to be provided with spray thrower 5.The thin smog 8 of condensation that the fine water droplets 7 that is sprayed by spray thrower 5 when gas molecule is generated during cooling rapidly has very big surface area.Because its huge surface area makes gas molecule be absorbed by fine smog certainly.More particularly, volume is 1ml the surface area that water droplet had is 4.83cm
2When this water droplet is subdivided into the water droplet that some diameters are 3 μ m (this is a kind of minimum water droplet that can with the naked eye see), its gross area will increase to 2.0m
2Or perhaps 20000cm
2, this area is equivalent to an independent 1cm
34140 times of water droplet area.In the condensation incipient stage, the diameter of water droplet is also little, therefore makes their total surface area bigger.For SO
2And NO
2Molecule, they are certain to be absorbed by surface area big fine smog 8 like this.
We have carried out such experiment, use one to have the film that chimney that length separately is all the up-hill line 3 of 3m and descending pipeline 4 burns a kind of vinyl chloride in this experiment.The result proves that the canescence flue gas of discharging from descending pipeline 4 bottoms (major part is the smog of condensation) does not have the smell of chlorine.
Burnt gas 2 contains a large amount of carbonic acid gases.If spray is not water but limewash, so just can make carbon dioxide in the burnt gas with CaCO
3Form be fixed, the result makes the absorptivity of carbon dioxide improve greatly.Therefore, limewash has the absorptivity more much higher than pure water.
If chimney of the present invention is just bent by the straight tube of a routine simply and forms, its smoke abatement ability will equal zero so.Yet chimney of the present invention is equipped with a spray thrower 5.Therefore the burnt gas 2 that enters descending pipeline 4 is also very promptly cooled down by fine water droplets 7 sprays that spray thrower 5 sprays.From aerodynamics, also can receive same effect in the first half heat exhaust gases of the upright chimney of a routine.That is to say, cool off the inside of descending pipeline 4 and can improve the smoke abatement ability.
In actual experiment, in case begin spray in descending pipeline 4, even at this moment form an opening partly in the top curved part, flue gas also can't be escaped away by this opening.In contrast, air outside is drawn in this chimney by this opening.
According to the present invention, on the whole length of descending pipeline 4, water is sprayed in this pipeline simply, can make harmful pollutant automatically, be absorbed naturally.This spray thrower is simple in structure, and it is made up of pump and a nozzle that is used to spray water of a smaller power, and its operating cost is low.In addition, the water droplet that has absorbed noxious pollutant descends owing to the gravity effect and adheres on the detar device 6, so just makes these water droplets be easy to be collected.Place shower water of collecting and condensed water a defecator to make it purification and it is recycled to be used for spray.Along with the increase of running time, must constantly replenish the spray water, in order to avoid cause the deficiency of cooling water.
The invention is not restricted to above-mentioned embodiment.Can carry out various improvement and change within the scope of the invention.
Claims (2)
1, a kind of method by the coagulation purifying combustion waste gas, said method comprises the following step: the burnt gas that guiding is emitted from the burner charging that makes progress, then guide the charging downwards obliquely of said burnt gas, and simultaneously from obliquely the top of the burnt gas of charging downwards spray a kind of small droplet, and collect and to be suspended in airborne small droplet, carrier band is walked pollutant and carbon dioxide.
2, a kind of chimney that is used for coming purifying combustion waste gas by condensation, it comprises: a up-hill line is used to guide the burnt gas of emitting from burner; One is connected with said up-hill line and downward-sloping descending pipeline, is used to guide said burnt gas descending; A spray thrower is used on the whole length of said descending pipeline a kind of fine droplets being sprayed into this pipeline; And a detar device that is arranged at said descending duct bottom, be used for collecting and be suspended in the said fine droplets that air and carrier band pollutant and carbon dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92111340A CN1085120A (en) | 1992-10-07 | 1992-10-07 | The method and the chimney that are used for condensation and purifying combustion gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92111340A CN1085120A (en) | 1992-10-07 | 1992-10-07 | The method and the chimney that are used for condensation and purifying combustion gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1085120A true CN1085120A (en) | 1994-04-13 |
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ID=4945306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92111340A Pending CN1085120A (en) | 1992-10-07 | 1992-10-07 | The method and the chimney that are used for condensation and purifying combustion gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1085120A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021139815A1 (en) * | 2020-01-09 | 2021-07-15 | 高境 | Exhaust gas purifying system and method |
-
1992
- 1992-10-07 CN CN92111340A patent/CN1085120A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021139815A1 (en) * | 2020-01-09 | 2021-07-15 | 高境 | Exhaust gas purifying system and method |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |