CN109603508A - Using the coal gas flue gas processing device and method of sodium bicarbonate dry desulfurization - Google Patents
Using the coal gas flue gas processing device and method of sodium bicarbonate dry desulfurization Download PDFInfo
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- CN109603508A CN109603508A CN201811482346.4A CN201811482346A CN109603508A CN 109603508 A CN109603508 A CN 109603508A CN 201811482346 A CN201811482346 A CN 201811482346A CN 109603508 A CN109603508 A CN 109603508A
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- gas
- sodium bicarbonate
- flue
- burning
- boiler
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- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 title claims abstract description 176
- 229910000030 sodium bicarbonate Inorganic materials 0.000 title claims abstract description 88
- 235000017557 sodium bicarbonate Nutrition 0.000 title claims abstract description 88
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 239000003546 flue gas Substances 0.000 title claims abstract description 68
- 239000003034 coal gas Substances 0.000 title claims abstract description 55
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 41
- 230000023556 desulfurization Effects 0.000 title claims abstract description 40
- 238000012545 processing Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims description 7
- 239000007789 gas Substances 0.000 claims abstract description 155
- 238000004140 cleaning Methods 0.000 claims abstract description 21
- 230000000149 penetrating effect Effects 0.000 claims abstract description 14
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 238000003672 processing method Methods 0.000 claims abstract description 3
- 239000007921 spray Substances 0.000 claims description 16
- 239000000779 smoke Substances 0.000 claims description 11
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 7
- 239000003245 coal Substances 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-N sodium;hydron;carbonate Chemical compound [Na+].OC(O)=O UIIMBOGNXHQVGW-UHFFFAOYSA-N 0.000 claims 2
- 206010022000 influenza Diseases 0.000 claims 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract description 34
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract description 24
- 229910000029 sodium carbonate Inorganic materials 0.000 abstract description 16
- 238000000354 decomposition reaction Methods 0.000 abstract description 9
- 238000011282 treatment Methods 0.000 abstract description 5
- 239000003517 fume Substances 0.000 abstract description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 description 4
- 235000011152 sodium sulphate Nutrition 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 3
- 230000003009 desulfurizing effect Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
-
- 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
- F23J15/003—Arrangements of devices for treating smoke or fumes for supplying chemicals to fumes, e.g. using injection devices
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/606—Carbonates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/20—Sulfur; Compounds thereof
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to coal gas fume treatments, a kind of coal gas flue gas processing device using sodium bicarbonate dry desulfurization is provided, including burning gas boiler, the exhanst gas outlet of burning gas boiler is connected to chimney by gas cleaning processing component, in being provided with economizer and air preheater in burning gas boiler, it further include sodium bicarbonate adding set, sodium bicarbonate adding set includes the penetrating pipe that sodium bicarbonate storehouse and feeding inlet are connected to sodium bicarbonate storehouse, the discharge port for spraying into pipe is connected to the flue of gas boiler and discharge port is located between the exhanst gas outlet of economizer and the exhanst gas outlet of burning gas boiler；A kind of coal gas flue gas processing method using sodium bicarbonate dry desulfurization is also provided.In the present invention, sodium bicarbonate is sprayed into the flue of burning gas boiler, sodium bicarbonate can be effectively decomposed using the high temperature in burning gas boiler flue, the sodium carbonate generated after decomposition can sufficiently react under the conditions of suitable temperature with the sulfur dioxide in flue gas to reach desulfurization purpose, it is ensured that sodium bicarbonate desulfuration efficiency.
Description
Technical field
The present invention relates at coal gas fume treatment more particularly to a kind of coal gas flue gas using sodium bicarbonate dry desulfurization
Manage device and method.
Background technique
In recent years, numerous iron and steel enterprises start gradually to reinforce to recycle surplus gas resource (such as blast furnace gas, coal gas of converter,
Coke-stove gas etc.) it is used for burning gas boiler generating set.According to National Emission Standard GB13223-2011, " thermal power plant is big
Gas pollutant emission standard " regulation, it is of less demanding as the boiler of fuel or gas turbine group sulfur dioxide emissioning concentration using gas
In 35mg/Nm3, so the flue gas desulfurization processing of burning gas boiler is particularly important.Although being disclosed at present using sodium bicarbonate
Dry desulfurization, but sodium bicarbonate desulfurizing agent is difficult to effectively carry out chemical reaction absorption sulfur dioxide in flue, so flue gas is de-
Sulphur effect is often not ideal enough, it is difficult to meet sulfur dioxide emissioning concentration not higher than 35mg/Nm3Discharge standard or more sternly want
It asks.
Summary of the invention
The purpose of the present invention is to provide a kind of using the coal gas flue gas processing device of sodium bicarbonate dry desulfurization and side
Method, it is intended to for solving the problems, such as that existing coal gas flue gas is poor using sodium bicarbonate desulfurization effect.
The present invention is implemented as follows:
The embodiment of the present invention provides a kind of coal gas flue gas processing device using sodium bicarbonate dry desulfurization, including coal gas
The exhanst gas outlet of boiler, the burning gas boiler is connected to chimney, Yu Suoshu burning gas boiler by gas cleaning processing component
It is inside provided with economizer and air preheater, is connected between the economizer and the air preheater by flue, and described
Air preheater further includes sodium bicarbonate adding set close to the exhanst gas outlet of the burning gas boiler, the sodium bicarbonate addition dress
Set the penetrating pipe being connected to including sodium bicarbonate storehouse and feeding inlet with the sodium bicarbonate storehouse, the discharge port and the coal for spraying into pipe
The flue gas of the flue of gas boiler is connected to and the discharge port is located at the economizer exhanst gas outlet and the burning gas boiler goes out
Between mouthful.
Further, when the coal gas to burn in the burning gas boiler is blast furnace gas or coal gas of converter, it is described go out
Material mouth is connected to the flue between the economizer and the air preheater.
Further, and in the gas inlet of the exhanst gas outlet of the burning gas boiler and the gas cleaning processing component
Between flue on be provided with gas heater.
Further, when the coal gas to burn in the burning gas boiler is coke-stove gas, the discharge port is connected to institute
The flue of the smoke outlet of air preheater is stated, and the sodium bicarbonate of the discharge outlet is heated.
Further, flue duct bypass is provided on Yu Suoshu burning gas boiler, described flue duct bypass one end is connected to described
The exhanst gas outlet of economizer, the other end is connected to the smoke outlet of the air preheater, and sets on the by-pass flue
It is equipped with the damper for adjusting flue gas flow in it.
Further, and in the gas inlet of the air preheater and smoke outlet it is provided with smoke temperature measuring point.
Further, the penetrating pipe is two, sodium bicarbonate storehouse described in two penetrating pipe parallel communications and the combustion
The flue of gas boiler, two it is described spray into pipes on be provided with control its on-off valve.
Further, the sodium bicarbonate in the sodium bicarbonate storehouse is powdered, and passes through compressed air for it by the penetrating
Pipe blasts in the flue of the burning gas boiler.
Further, the burning gas boiler is provided with cleaning door, the fire coal immediately below the air preheater
The exhanst gas outlet of gas boiler is located at the top of the cleaning door.
The embodiment of the present invention also provides a kind of coal gas flue gas processing method using sodium bicarbonate dry desulfurization, in coal gas
Boiler work during, by exhanst gas outlet from sodium bicarbonate storehouse to burning gas boiler and economizer exhanst gas outlet between flue
Interior penetrating sodium bicarbonate powder carries out desulfurization to the flue gas in flue by sodium bicarbonate, and the flue gas after desulfurization is through gas cleaning component
It is discharged after processing by chimney.
The invention has the following advantages:
In processing unit of the invention, coal gas more than needed imports burning in burning gas boiler and generates flue gas, when flue gas stream
When through flue between economizer and the exhanst gas outlet of burning gas boiler, little Su is injected into this section of flue by sodium bicarbonate storehouse
It beats, sodium bicarbonate can be mixed with high-temperature flue gas derived from the exhanst gas outlet of economizer, the flue gas temperature being in general discharged through economizer
Degree reaches 250 degree or more, and under the temperature conditions, sodium bicarbonate can be completely decomposed into sodium carbonate, and under the hot environment
The sodium carbonate of decomposition can be reacted with the sulfur dioxide in flue gas generates sodium sulphate, and then realizes the desulfurization effect to flue gas.?
In the present invention, what is considered first is sodium bicarbonate decomposition temperature, and sodium bicarbonate is injected in the suitable position of flue, so that flue can expire
The decomposition temperature requirement of sufficient sodium bicarbonate, sodium bicarbonate sufficiently can be decomposed even completely, and the sodium carbonate generated after decomposition is suitable
It can sufficiently be reacted with the sulfur dioxide in flue gas under the conditions of temperature and generate sodium sulphate, so that the desulfurization effect in flue gas is non-
Chang Hao carries out purified treatment to the dust granule in it subsequently through gas cleaning processing component, so that the flue gas of discharge chimney
Reach discharge standard.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the coal gas of the coal gas flue gas processing device provided in an embodiment of the present invention using sodium bicarbonate dry desulfurization
For blast furnace gas or the structural schematic diagram of coal gas of converter；
Fig. 2 is the coal gas of the coal gas flue gas processing device provided in an embodiment of the present invention using sodium bicarbonate dry desulfurization
For the structural schematic diagram of coke-stove gas.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1 and Fig. 2, the embodiment of the present invention provides a kind of coal gas fume treatment using sodium bicarbonate dry desulfurization
Device, primarily directed to the fume treatment that coal gas burning generates, coal gas is specially blast furnace gas, coal gas of converter and coke oven
Coal gas etc., processing unit include burning gas boiler 1, and coal gas imports burning in burning gas boiler 1 and fired with generating coal gas flue gas
The exhanst gas outlet of gas boiler 1 is connected to chimney 8 by gas cleaning processing component 2, and wherein gas cleaning processing component 2 is main
For bag filter, the solid particle being mainly used in purifying smoke, such as dust etc. are discharged in burning gas boiler 1
Flue gas is discharged after bag filter filters by chimney 8, and bag filter carries out deashing, the interior ash collected by compressed air
Dirt can be directed at ash cellar, and economizer 3 and air preheater 4 are provided in burning gas boiler 1, and wherein economizer 3 is generally used for
To circulating water heating, and air preheater 4 is then for preheating to air, and economizer 3 is located at 4 top of air preheater,
It is connected between the two by flue, and air preheater 4 is close to the exhanst gas outlet of burning gas boiler 1, i.e., by the flue gas of economizer 3
Export derived flue gas and enter air preheater 4 through flue and exchange heat, and by the flue gas of the exhanst gas outlet of air preheater 4 by
The exhanst gas outlet of burning gas boiler 1 is discharged；Processing unit further includes sodium bicarbonate adding set 5 comprising sodium bicarbonate storehouse 51 and
Pipe 52 is sprayed into, wherein 51 memory of sodium bicarbonate storehouse is placed with sodium bicarbonate powder, and spraying into pipe 52 then is connection sodium bicarbonate storehouse 51 and fire coal
The flue of gas boiler 1, specifically penetrating pipe 52 feeding inlet be connected to the bottom in sodium bicarbonate storehouse 51, penetrating pipe 52 discharge port and
The flue of burning gas boiler 1 is connected to, and the bottom in sodium bicarbonate storehouse 51 uses funnel structure, is in gradually-reducing shape in a downward direction, small
Sodium bicarbonate powder in soda storehouse 51 can be fallen to automatically to be sprayed into pipe 52, and small in pipe 52 by will spray into compressed air
Soda sprays into burning gas boiler 1, and the discharge port for spraying into pipe 52 is connected to the flue of gas boiler and discharge port is located at economizer 3
Exhanst gas outlet and burning gas boiler 1 exhanst gas outlet between.It is empty by compression when burning gas boiler 1 works in the present invention
Gas sprays into the sodium bicarbonate in pipe 52 is sprayed into the correspondence flue of burning gas boiler 1, and under the effect of flue hot environment, usually should
Temperature is more than 250 degree, and sodium bicarbonate can sufficiently be completely decomposed into sodium carbonate, and sodium carbonate can be flowed with flue gas is synchronous, can be in height
It is reacted under conditions of 140 degree with the sulfur dioxide in flue gas and generates sodium sulphate, and then the desulfurization movement to flue gas may be implemented,
And it is discharged after the solid particle handled in flue gas through gas cleaning processing component 2 by chimney 8.In the above-mentioned course of work, consider
To the decomposition temperature of sodium bicarbonate, thus sodium bicarbonate powder is injected directly into burning gas boiler 1, the flue gas in burning gas boiler 1
Temperature can satisfy the decomposition temperature of sodium bicarbonate, sodium bicarbonate be decomposed completely in the flue of burning gas boiler 1, in turn
The sulfur dioxide in flue gas can be effectively absorbed, sprays into point position from there through flexible choice sodium bicarbonate, it can be farthest
Promote sodium bicarbonate by thermal decomposition to preferably play desulfidation, and can minimally reduce because desulfurizing agent sprays into point position
The influence for changing and air preheater 4 being generated.
Referring specifically to Fig. 1, for the difference of coal gas, sodium bicarbonate sprays into point position and should be adjusted, for example works as coal gas
When the interior coal gas to burn of boiler 1 is blast furnace gas or coal gas of converter, the discharge port for spraying into pipe 52 is connected to economizer 3 and sky
Flue between air preheater 4.In the present embodiment, sodium bicarbonate sprays into the flue between economizer 3 and air preheater 4, and
It is relatively high in the flue gas in flue temperature, it is greater than 250 degree, sodium bicarbonate is by direct fast decoupled, and the sodium carbonate after decomposition is with cigarette
Gas is flowed in flue, and then can be uniformly mixed with the flue gas in flue, generally the flue gas temperature after the heat exchange of air preheater 4
Degree is greater than 140 degree, can satisfy the temperature requirement that sodium carbonate is reacted with sulfur dioxide also to 160 degree or so, then the carbon after decomposing
Sour sodium can be with the sulfur dioxide fully reacting in flue gas.Generally, when using blast furnace gas or coal gas of converter as coal gas,
Heated by gas is additionally provided on flue between the exhanst gas outlet of gas boiler and the gas inlet of gas cleaning processing component 2
Device 6, gas heater 6 is also heat exchanger components, for preheating to the coal gas of burning, to improve the heat utilization of coal gas
Rate, the sodium carbonate after sodium bicarbonate decomposes mainly carry out desulfurization in the flue before gas heater 6.In addition in gas heater
It is provided with soot blower 61 on 6, for improving the heat exchange efficiency of gas heater 6, the dust stratification in flue is avoided to influence heat transmitting effect
Fruit.
Referring specifically to Fig. 2, and in another embodiment, coal gas is coke-stove gas, then the discharge port for spraying into pipe 52 connects
The flue near the exhanst gas outlet of air preheater 4 is passed to, and the sodium bicarbonate of discharge port is heated.In the present embodiment,
Coal gas is coke-stove gas, and the sulfur-bearing comparison of ingredients in coke-stove gas is high, generally requires the exhanst gas outlet temperature of air preheater 4
Degree is higher than dew-point temperature, thus the discharge port for spraying into pipe 52 is set to the flue of the exhanst gas outlet side of air preheater 4, but
It is then before sodium bicarbonate sprays into flue, to be heated to sodium bicarbonate, so that little Su since flue-gas temperature is lower than 250 degree at this
It beats and is decomposed into sodium carbonate in a heated condition, then show that the desulfurizing agent entered in 1 flue of burning gas boiler is the carbonic acid after decomposing
Sodium, sodium carbonate can sufficiently react in flue with the sulfur dioxide in flue gas.In a preferred approach, it is set on burning gas boiler 1
It is equipped with flue duct bypass 7,7 one end of flue duct bypass is connected to the exhanst gas outlet of economizer 3, and the other end is connected to air preheater 4
Smoke outlet is provided with the damper 71 for adjusting its flue gas flow on flue duct bypass 7, can be controlled by damper 71
The on-off of flue duct bypass 7 processed and the flue gas flow in it, to meet the reaction temperature requirement of sodium bicarbonate.It is, of course, also possible to adopt
Individually the sodium bicarbonate sprayed into pipe 52 is heated with other forms, so that sodium bicarbonate is being sprayed onto cigarette in burning gas boiler 1
It has been decomposed when road.In the present embodiment, flue duct bypass 7 is the heating structure of sodium bicarbonate, by flue duct bypass 7 by air preheater
Flue gas partial before 4 gas inlet directly passes through the exhanst gas outlet side that flue duct bypass 7 is directed at air preheater 4, the portion
Flue gas is divided to exchange heat without air preheater 4, but the pyrolysis heat source as sodium bicarbonate, it is in general first by itself and penetrating
Sodium bicarbonate in pipe 52 is mixed, and sodium bicarbonate is first decomposed into sodium carbonate, and sodium carbonate is then sprayed into air preheater 4 again
In one side flue of exhanst gas outlet.In addition, the gas inlet and smoke outlet in air preheater 4 are provided with smoke temperature measuring point,
For detecting the flue-gas temperature at the two positions, the flue gas flow in flue duct bypass 7 is controlled by this temperature point mode.
Referring again to Fig. 1 and Fig. 2, further, pass through two between sodium bicarbonate storehouse 51 and the flue of burning gas boiler 1
It sprays into pipe 52 to connect, the valve 521 for being provided with controller on-off on pipe 52 is sprayed at two.In the present invention, sodium bicarbonate is powder
Last shape sprays into pipe 52 in compressed air effect lower edge and flows, it is possible that the case where generating blocking, is thus arranged two penetratings and manages
52, one main one is secondary, and formation is spare, to guarantee that sodium bicarbonate continues desulfurization.In addition, two penetrating pipes 52 can share a gas source,
When in use, spray into pipe 52 on valve 521 open, on the contrary it is then by spray into pipe 52 on valve 521 close, it is certain two spray into
Valve 521 on pipe 52 should be all made of solenoid valve, facilitate control.In general, burning gas boiler 1 air preheater 4 just under
Side is provided with cleaning door 11, and the exhanst gas outlet area of burning gas boiler 1 is located at 11 top of cleaning door.The cleaning door of burning gas boiler 1
11 use throat structure, and partial desulfurization reaction is occurred in burning gas boiler 1, and the sodium sulphate particle part of generation is in coal gas
Deposition in boiler 1, and then can be collected and be discharged by the cleaning door 11, there are also the partial particulates carried in flue gas certainly can also be in deashing
Mouth 11 is collected.
Referring to Fig. 1 and Fig. 2, the embodiment of the present invention is also provided at a kind of coal gas flue gas using sodium bicarbonate dry desulfurization
Reason method mainly passes through sodium bicarbonate storehouse 51 specifically in 1 course of work of burning gas boiler using above-mentioned processing unit
To burning gas boiler 1 exhanst gas outlet and economizer 3 exhanst gas outlet between flue in spray into sodium bicarbonate powder, sodium bicarbonate exists
Sodium carbonate is first decomposed under 250 degree or more high temperature actions, and the sodium carbonate under 140 degree of high temperature actions after decomposition can be with flue gas
In sulfur dioxide reaction, with achieve the purpose that the flue gas to flue gas desulfurization, after desulfurization through gas cleaning component processing after by cigarette
Chimney 8 is discharged.In the present embodiment, by spraying into sodium bicarbonate into the flue of burning gas boiler 1 to achieve the purpose that desulfurization, selection are closed
Suitable penetrating position recycles the sodium carbonate desulfurization after decomposing, can be effectively ensured de- so that sodium bicarbonate can be decomposed first completely
Sulphur efficiency.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of coal gas flue gas processing device using sodium bicarbonate dry desulfurization, including burning gas boiler, the fire coal steam pot
The exhanst gas outlet of furnace is connected to chimney by gas cleaning processing component, and economizer and sky are provided in Yu Suoshu burning gas boiler
Air preheater is connected between the economizer and the air preheater by flue, and the air preheater is close to described
The exhanst gas outlet of burning gas boiler, it is characterised in that: further include sodium bicarbonate adding set, the sodium bicarbonate adding set includes small
The penetrating pipe that soda storehouse and feeding inlet are connected to the sodium bicarbonate storehouse, the discharge port for spraying into pipe and the gas boiler
Flue is connected to and the discharge port is located between the exhanst gas outlet of the economizer and the exhanst gas outlet of the burning gas boiler.
2. using the coal gas flue gas processing device of sodium bicarbonate dry desulfurization as described in claim 1, it is characterised in that: described
When the coal gas to burn in burning gas boiler is blast furnace gas or coal gas of converter, the discharge port be connected to the economizer with
Flue between the air preheater.
3. using the coal gas flue gas processing device of sodium bicarbonate dry desulfurization as claimed in claim 2, it is characterised in that: and in
Coal is provided on flue between the exhanst gas outlet of the burning gas boiler and the gas inlet of the gas cleaning processing component
Hot-air heater.
4. using the coal gas flue gas processing device of sodium bicarbonate dry desulfurization as described in claim 1, it is characterised in that: described
When the coal gas to burn in burning gas boiler is coke-stove gas, the discharge port is connected to the exhanst gas outlet of the air preheater
The flue at place, and the sodium bicarbonate of the discharge outlet is heated.
5. using the coal gas flue gas processing device of sodium bicarbonate dry desulfurization as claimed in claim 4, it is characterised in that: in institute
It states and is provided with flue duct bypass on burning gas boiler, described flue duct bypass one end is connected to the exhanst gas outlet of the economizer, another
End is connected to the smoke outlet of the air preheater, and in being provided on the by-pass flue for adjusting flue gas stream in it
The damper of amount.
6. using the coal gas flue gas processing device of sodium bicarbonate dry desulfurization as claimed in claim 5, it is characterised in that: and in
The gas inlet and smoke outlet of the air preheater are provided with smoke temperature measuring point.
7. using the coal gas flue gas processing device of sodium bicarbonate dry desulfurization as described in claim 1, it is characterised in that: described
Spraying into pipe is two, two flues for spraying into sodium bicarbonate storehouse and the burning gas boiler described in pipe parallel communication, two institutes
State the valve for spraying into and being provided on pipe and controlling its on-off.
8. using the coal gas flue gas processing device of sodium bicarbonate dry desulfurization as described in claim 1, it is characterised in that: described
Sodium bicarbonate in sodium bicarbonate storehouse is powdered, and it is blasted the burning gas boiler by the penetrating pipe by compressed air
In flue.
9. using the coal gas flue gas processing device of sodium bicarbonate dry desulfurization as described in claim 1, it is characterised in that: described
Burning gas boiler is provided with cleaning door immediately below the air preheater, and the exhanst gas outlet of the burning gas boiler is located at institute
State the top of cleaning door.
10. a kind of coal gas flue gas processing method using sodium bicarbonate dry desulfurization, which is characterized in that work in burning gas boiler
In the process, by exhanst gas outlet from sodium bicarbonate storehouse to burning gas boiler and economizer exhanst gas outlet between flue in spray into it is small
Soda powder carries out desulfurization to the flue gas in flue by sodium bicarbonate, flue gas after desulfurization after the processing of gas cleaning component by
Chimney discharge.
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| CN201811482346.4A CN109603508A (en) | 2018-12-05 | 2018-12-05 | Using the coal gas flue gas processing device and method of sodium bicarbonate dry desulfurization |
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| CN201811482346.4A CN109603508A (en) | 2018-12-05 | 2018-12-05 | Using the coal gas flue gas processing device and method of sodium bicarbonate dry desulfurization |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111928290A (en) * | 2020-07-21 | 2020-11-13 | 中冶南方都市环保工程技术股份有限公司 | Boiler flue gas treatment system |
| CN112484062A (en) * | 2020-10-27 | 2021-03-12 | 中冶南方都市环保工程技术股份有限公司 | Energy-saving and emission-reducing system for tail flue gas of gas boiler |
| CN112915771A (en) * | 2021-03-23 | 2021-06-08 | 中国能源建设集团湖南省电力设计院有限公司 | Baking soda dry desulfurization flue gas bypass device |
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| CN111928290A (en) * | 2020-07-21 | 2020-11-13 | 中冶南方都市环保工程技术股份有限公司 | Boiler flue gas treatment system |
| CN112484062A (en) * | 2020-10-27 | 2021-03-12 | 中冶南方都市环保工程技术股份有限公司 | Energy-saving and emission-reducing system for tail flue gas of gas boiler |
| CN112915771A (en) * | 2021-03-23 | 2021-06-08 | 中国能源建设集团湖南省电力设计院有限公司 | Baking soda dry desulfurization flue gas bypass device |
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