CN106975335A - A kind of sodium base spray dry desulfurization system - Google Patents
A kind of sodium base spray dry desulfurization system Download PDFInfo
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- CN106975335A CN106975335A CN201710233693.2A CN201710233693A CN106975335A CN 106975335 A CN106975335 A CN 106975335A CN 201710233693 A CN201710233693 A CN 201710233693A CN 106975335 A CN106975335 A CN 106975335A
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- Prior art keywords
- compressed air
- lye
- injection
- lye tank
- spray dry
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 73
- 230000023556 desulfurization Effects 0.000 title claims abstract description 66
- 239000007921 spray Substances 0.000 title claims abstract description 59
- 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 title claims abstract description 40
- 239000011734 sodium Substances 0.000 title claims abstract description 40
- 229910052708 sodium Inorganic materials 0.000 title claims abstract description 40
- 239000003513 alkali Substances 0.000 claims abstract description 90
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000003546 flue gas Substances 0.000 claims abstract description 48
- 239000002585 base Substances 0.000 claims abstract description 44
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 43
- 235000019504 cigarettes Nutrition 0.000 claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Substances [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 590
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 306
- 238000002347 injection Methods 0.000 claims description 102
- 239000007924 injection Substances 0.000 claims description 102
- 239000007788 liquid Substances 0.000 claims description 64
- 239000012530 fluid Substances 0.000 claims description 60
- 239000007864 aqueous solution Substances 0.000 claims description 38
- 238000003756 stirring Methods 0.000 claims description 31
- 238000006243 chemical reaction Methods 0.000 claims description 30
- 239000007789 gas Substances 0.000 claims description 26
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 25
- 238000004140 cleaning Methods 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 7
- 239000003599 detergent Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 31
- 239000003595 mist Substances 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 8
- 239000011575 calcium Substances 0.000 abstract description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052791 calcium Inorganic materials 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 abstract description 5
- 238000004537 pulping Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000002956 ash Substances 0.000 description 62
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 56
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 29
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 28
- 239000000243 solution Substances 0.000 description 19
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 14
- 229910052938 sodium sulfate Inorganic materials 0.000 description 14
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 14
- 235000011152 sodium sulphate Nutrition 0.000 description 13
- 235000010265 sodium sulphite Nutrition 0.000 description 13
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 12
- 238000005507 spraying Methods 0.000 description 12
- 239000003795 chemical substances by application Substances 0.000 description 10
- 239000002245 particle Substances 0.000 description 10
- 239000005864 Sulphur Substances 0.000 description 9
- 239000007787 solid Substances 0.000 description 9
- 230000003009 desulfurizing effect Effects 0.000 description 8
- 238000011049 filling Methods 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- 239000002002 slurry Substances 0.000 description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 239000012467 final product Substances 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000001694 spray drying Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 3
- 229910001948 sodium oxide Inorganic materials 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 2
- 239000000347 magnesium hydroxide Substances 0.000 description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 2
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000007832 Na2SO4 Substances 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000010882 bottom ash Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010129 solution processing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/18—Evaporating by spraying to obtain dry solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
-
- 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
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- 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
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to environmental technology field, a kind of sodium base spray dry desulfurization system, including desulfurizer, alkali lye feeding mechanism, pneumatic ash conveying plant, compressed air supply system and control device are disclosed.Sodium base spray dry desulfurization system of the present invention solves fouling and blocking, rich solution in existing Wet Flue Gas Desulfurization Technique and is difficult to handle, corrode and wear and tear and formed the insoluble problem such as white cigarette mist, simultaneously, also pulping process complexity, the one-time investment for solving calcium base spray dry desulfurization technique are high, the problems such as pump, pipeline and sprayer unit are blocked.In addition, when in use, sodium base spray dry desulfurization system desulfuration efficiency of the present invention is high, floor space is small, and water saving, energy-saving effect are notable.
Description
Technical field
The present invention relates to environmental technology field, more particularly to a kind of sodium base spray dry desulfurization system.
Background technology
In process of production, in various stoves, kiln during the fuel of combustion of sulfur, sulphur in fuel at high temperature with air
Following reaction occurs for oxygen：
S+O2=S O2Generate sulfur dioxide (S O2)。
Sulfur dioxide is the toxic and harmful gas for seriously endangering human health.In the prior art, in order to eliminate titanium dioxide
Harm of the sulphur to human health, is usually removed (abbreviation desulfurization) to the sulfur dioxide in flue gas in the following ways：Utilize
Some alkaline matters (such as calcium oxide or magnesia), calcium hydroxide (Ca (OH) is made by adding water2) or magnesium hydroxide (Mg
(OH)2) slurries, then squeeze into absorption tower through pump and fully contacted with flue gas, make the titanium dioxide in the nitride sulphur flue gas in flue gas
Sulphur carries out reaction generation MgSO with the calcium hydroxide or magnesium hydroxide in slurries3Or CaSO3, so as to remove the titanium dioxide in flue gas
Sulphur.This technology is currently the agent technology of desulfurization, also known as Wet Flue Gas Desulfurization Technique, and about more than 90% desulfurization tolerance uses this
The technology of kind.But this technology has some disadvantages：
Fouling and blocking：In this flue gas desulfurization, equipment and defeated slurries pipeline are it occur frequently that fouling and blocking, serious shadow
The normal work of devulcanizer is rung, even results in that equipment is entirely ineffective to scrap.
The processing of rich solution：The rich solution (containing waste liquids such as flue dust, sulfate, sulphite) washed after sulfur dioxide is if handle not
In time, the pollution of water body is caused simultaneously, the rich solution of recycling causes the decline of desulfuration efficiency also because of its alkalescence reduction.
Corrosion and abrasion：During coal burning in addition to sulfur dioxide is generated, a small amount of sulfur trioxide (SO is also generated3), cigarette
The concentration of sulfur trioxide is 10~40ppm in gas, due to typically containing water (4%~12%), the sulfur trioxide of generation in flue gas
Sulfuric acid mist is formed in moment.When the temperature is low, sulfuric acid mist condenses into sulfuric acid and is attached on the inwall of equipment, or is dissolved in washing
In liquid.Here it is wet absorption tower and about equipment corrosion quite serious main cause.
Form white cigarette mist：Wet absorption tower in the process of running, is also easy to produce " mist " that particle diameter is 10~60 μm." mist " not only
Containing moisture, it is also dissolved with sulfuric acid, sulfate, sulfur dioxide etc., if do not properly settled, " mist " of any entrance chimney, actual
Exactly sulfur dioxide is discharged into air again, is the important sources of the formation such as PM2.5 in atmospheric haze.
Also have lime slurry spray dry desulfurization method (calcium base spray dry desulfurization method) at present, although this method overcomes
Some shortcomings of sulfur method are stated, but because of pulping process complexity, one-time investment height in its technique, pump, pipeline and spraying dress
The reasons such as blocking are put, are not also widely used.
The content of the invention
(1) technical problem to be solved
The present invention provides a kind of sodium base spray dry desulfurization system, to solve in existing Wet Flue Gas Desulfurization Technique fouling and stifled
Plug, rich solution are the problem of be difficult to handle, corrode and wear and tear and formed white cigarette mist and lime slurry spray dry desulfurization method its slurrying
Complex process, one-time investment are high, the problem of pump, pipeline and sprayer unit are blocked.
(2) technical scheme
In order to solve the above-mentioned technical problem, the invention provides a kind of sodium base spray dry desulfurization system, the system bag
Desulfurizer, alkali lye feeding mechanism, pneumatic ash conveying plant, compressed air supply system and control device are included,
The middle and upper part that the desulfurizer is included in sealed housing, the housing is provided with multiple two-fluid shower nozzles, institute
The lower end for stating housing is connected with ash bucket, the housing and is provided with flue, and the air inlet of the flue is through described
The side wall of the lateral wall of the lower sides of housing and the flue and the housing is tightly connected, and the flue goes out
Gas port is arranged on the top of the two-fluid shower nozzle and with being connected in the housing, is additionally provided with the lower sides of the housing
SO is provided with exhanst gas outlet, the exhanst gas outlet2Sensor,
The Pneumatic ash conveying component includes being arranged on the Pneumatic ash conveying pipeline below the ash bucket,
The alkali lye feeding mechanism is included at least one lye tank for storing sodium hydrate aqueous solution, the lye tank
Liquid level sensor is provided with, the lye tank is connected by transfer line with the liquid-inlet of the two-fluid shower nozzle, described defeated
Frequency conversion lye pump is provided with liquid pipe line,
The compressed air supply system includes air compressor and compressed air reservoir, the compressed air reservoir
Connected respectively by pipeline with the air intlet, Pneumatic ash conveying pipeline and lye tank of the two-fluid shower nozzle,
The control device and the SO2Sensor, liquid level sensor and frequency conversion lye pump are electrically connected.
Further, the lye tank is two, and two lye tanks are standby each other, and liquid level is provided with each lye tank
Sensor, the control device is respectively connected with the liquid level sensor in each lye tank.
Further, the ash bucket is in infundibulate, and the ash bucket includes being arranged in several below the housing, each
The discharging opening of the ash bucket is provided with star-shaped discharge valve,
The Pneumatic ash conveying pipeline includes the Pneumatic ash conveying Trunk Line connected with the compressed air reservoir and is connected
The Pneumatic ash conveying by-pass line of the discharging opening of each ash bucket, the Pneumatic ash conveying Trunk Line is connected simultaneously with the Pneumatic ash conveying by-pass line
Compressed air is conveyed into the Pneumatic ash conveying by-pass line.
Further, it is provided with conical fairing cap above the gas outlet of the correspondence flue in the housing.
Further, upper and lower two layers of flow straightening grid is provided with the upper space of the housing, the two-fluid shower nozzle is set
Put between two layers of flow straightening grid；
The jet of the two-fluid shower nozzle is set towards top.
Further, the transfer line includes the injection alkali lye Trunk Line connected with the lye tank and is connected to institute
Many injection branch road alkali liquor pipes on injection alkali lye Trunk Line are stated,
Connecting the pipeline of the two-fluid shower nozzle and the compressed air reservoir includes and the compressed air reservoir
The injection compressed air Trunk Line of connection and many injection branch roads compression being connected with the injection compressed air Trunk Line are empty
Tracheae,
The air inlet of each two-fluid shower nozzle connects short tube and the injection branch road compressed air by compressed air
Pipe is connected, and the liquid-inlet of each two-fluid shower nozzle connects short tube by feed flow and connected with the injection branch road alkali liquor pipe.
Further, the injection alkali lye Trunk Line is connected by lye tank supply pipe before pump respectively with two lye tanks,
Lye tank feed flow switch valve before pump is provided with before every pump on lye tank supply pipe, the frequency conversion lye pump is arranged on institute
State on injection alkali lye Trunk Line.
Further, in addition to detergent line, the detergent line includes clear water Trunk Line, and the clear water Trunk Line is divided into
Upper and two alkali lye are managed in three road outlet pipes, respectively clear water cleaning pipe, two lye tank clear water water injection pipes, the clear water cleaning
Case clear water water injection pipe is respectively arranged with the water injection valve of control water conduction,
The delivery port of clear water cleaning pipe is connected with the alkali lye Trunk Line that sprays, two lye tank clear water water injection pipes
Delivery port is corresponded with two lye tanks and connected.
Further, the outlet of the compressed air reservoir is provided with the main pressure-reducing valve of compressed air and compressed air master
Switch valve,
The inlet end of the injection branch road compressed air hose is provided with injection compressed air bypass valve and injection branch road compression
Air reducing valve,
The compressed air reservoir is connected by lye tank compressed air stirring pipe with the lye tank, the lye tank
Lye tank stirring compressed air pressure-reducing valve and lye tank stirring air pressure switch valve are provided with compressed air stirring pipe；
The compressed air reservoir is connected by Pneumatic ash conveying compressed-air line with the Pneumatic ash conveying pipeline, described
Pneumatic ash conveying pulse of compressed air valve and Pneumatic ash conveying compressed air pressure-reducing valve are provided with Pneumatic ash conveying compressed-air line.
Further, the control device be HNI touch-screen microprocessors, the HNI touch-screens microprocessor with it is described
SO2Sensor, the frequency conversion lye pump are electrically connected and according to SO2The feedback signal of sensor controls the frequency conversion lye pump
Rotating speed,
The HNI touch-screens microprocessor is connected with the liquid level sensor, and the HNI touch-screens microprocessor is also connected with
Sound light crossing-signal, the HNI touch-screens microprocessor is according to the feedback signal of the liquid level sensor to the sound and light alarm
Device sends control instruction.
(3) beneficial effect
The above-mentioned technical proposal of the present invention has the following advantages that：The sodium base spray dry desulfurization system that the present invention is provided, profit
With sodium hydrate aqueous solution as desulfurizing agent, and sodium hydrate aqueous solution and high pressure air are mixed using two-fluid shower nozzle
Sprayed afterwards from the nozzle of two-fluid shower nozzle, because there is larger speed difference, the height of high flow between air-flow and liquid stream during ejection
Pressure compressed air tears up the liquid film in liquid flow, and moment makes the huge micron order drop of sodium hydrate aqueous solution quantity of formation,
The micron order sodium hydrate aqueous solution drop of enormous amount has great specific surface area, the sulfur dioxide in flue
Chemistry hair occurs with ultra-fine sodium hydrate aqueous solution drop rapidly should generate microgranular sodium sulfite or sodium sulphate drop；It is microgranular
Sodium sulfite or sodium sulphate drop continue to run in housing with flue gas, and drying forms solid particle shape under high-temperature flue gas effect
Sodium sulfite or sodium sulphate.
Sodium base spray dry desulfurization system of the present invention is compared with conventional wet desulfurization technology：Due to water-soluble using sodium hydroxide
Liquid does not result in equipment and liquid-transport pipe-line fouling and obstruction as desulfurizing agent；Because sulfur dioxide and ultra-fine sodium hydroxide are water-soluble
The final product of liquid drop is solid particle shape sodium sulfite or sodium sulphate, so rich solution will not be produced, it is to avoid rich solution processing
Trouble；Hair can also occur with ultra-fine sodium hydrate aqueous solution drop and answer final product to be microgranular sulphur for sulfur trioxide in flue gas
Sour sodium, so sulfur trioxide is solved in low temperature, the problem of sulfuric acid droplet corrodes and worn and torn to equipment inner wall；Hydrogen of the present invention
Aqueous solution of sodium oxide drop is atomized rear particle diameter and reaches micron order, so unreacted sodium hydroxide solution drop is in later stage high temperature cigarette
It can be also oven-dried in the presence of gas, simultaneously because solubility of the sodium hydroxide in water is high, reach more than 50%, therefore its solution
In desulfurization, the consumption of solution is considerably less, so sodium base spray dry desulfurization system of the present invention will not also produce asking for white cigarette mist
Topic.
Sodium base spray dry desulfurization system of the present invention is compared with lime slurry spray drying Wet Flue Gas Desulfurization Technique：Sodium hydroxide
The aqueous solution is as desulfurizing agent, and it obtains technique than simple, reduces production cost, and sodium hydrate aqueous solution will not produce pump,
The problem of pipeline and spray assembly block.
Sodium base spray dry desulfurization system of the present invention solves fouling and blocking, rich solution in existing desulfurization technology and is difficult to locate
The insoluble problem such as reason, corrosion and abrasion and formation white cigarette mist；Meanwhile, with calcium base spray dry desulfurization process phase
Than pulping process complexity, the one-time investment for solving calcium base spray dry desulfurization technique are high, and pump, pipeline and sprayer unit are stifled
The problems such as plug.In addition, when in use, sodium base spray dry desulfurization system of the present invention is compared than other desulfurization methods, floor space
Small, desulfuration efficiency is high, and water saving, energy-saving effect are notable.
Except it is described above present invention solves the technical problem that, constitute technical scheme technical characteristic and have this
Outside the advantage that the technical characteristic of a little technical schemes is brought, what other technical characteristics of the invention and these technical characteristics were brought
Advantage, will be further illustrated with reference to accompanying drawing.
Brief description of the drawings
Fig. 1 is the structural representation of sodium base spray dry desulfurization system of the embodiment of the present invention；
Fig. 2 is Fig. 1 A-A sectional views；
Fig. 3 is Fig. 1 B-B sectional views；
Fig. 4 is Fig. 1 C-C sectional views；
Fig. 5 is the mounting structure figure of the two-fluid shower nozzle of sodium base spray dry desulfurization system of the embodiment of the present invention；
Fig. 6 is the control system schematic diagram of sodium base spray dry desulfurization system of the embodiment of the present invention.
In figure：1- supporting legs, 2- Pneumatic ash conveying Trunk Lines, 3- star-shaped discharge valves, 4- ash buckets, 5- exhanst gas outlets, 6- housings, 7-
Flue, 8- lower floors flow straightening grid, 9- injection branch road alkali liquor pipes, 10- feed flows connection short tube, 11- two-fluid shower nozzles, 12- sprays
Penetrate branch road compressed air hose, 13- upper stratas flow straightening grid, 14- fairing cap pillars, 15- fairing caps, 16- top covers, 17- injection branch roads
Compressed air pressure-reducing valve, 18- injection alkali lye bypass valves, 19- injection compressed air bypass valves, 20- injection compressed air Trunk Lines,
21- injection alkali lye Trunk Lines, the main pressure-reducing valve of 22- compressed airs, 23- compressed air main switching valves, 24- compressed air reservoirs,
25- air compressor export pipelines, 26- air compressors, 27- Pneumatic ash conveying by-pass lines, the decompression of 28- Pneumatic ash conveyings compressed air
Valve, 29- Pneumatic ash conveying pulse of compressed air valves, 30- Pneumatic ash conveying compressed-air lines, the lye tanks of 31- second stirring compression is empty
Exhaust switch valve, the lye tanks of 32- first stirring air pressure switch valve, the lye tanks of 33- second stirring compressed air pressure-reducing valve, 34-
First lye tank stirs compressed air pressure-reducing valve, and 35- the first lye tank compressed air stirring pipes, the lye tanks of 36- second compression is empty
Gas agitating pipe, 37- clear water cleaning pipe, 38- clear water purge valves, 39- the first lye tank clear water water injection valves, the lye tanks of 40- first are clear
Water water injection pipe, 41- the second lye tank clear water water injection valves, 42- the second lye tank clear water water injection pipes, the lye tanks of 43- first, 44-
First alkali lye before first lye tank feed pipe before two lye tanks, 45- clear water Trunk Lines, 46- frequency conversion lye pumps, 47- pumps, 48- pumps
Second lye tank feed flow switch valve, 51- compressed airs before second lye tank feed pipe, 50- pumps before case feed flow switch valve, 49- pumps
Connect short tube, 52- the first lye tank liquid level sensors, 53- the first liquid level sensor signal wires, 54-SO2Sensor, 55-SO2Pass
Sensor signal line, 56-HNI touch-screen microprocessors, the audible-visual annunciators of 57- first, the audible-visual annunciators of 58- second, 59- power supplys,
60- frequency converters, 61- the second liquid level sensor signal wires, 62- the second lye tank liquid level sensors.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained on the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
In addition, in the description of the invention, unless otherwise indicated, " multiple ", " many ", " multigroup " be meant that two or
Two or more, " several ", " some ", " some groups " are meant that one or more.
As shown in figure 1, sodium base spray dry desulfurization system provided in an embodiment of the present invention, the system is filled including desulfurization
Put, alkali lye feeding mechanism, pneumatic ash conveying plant, compressed air supply system and control device.
The desulfurizer includes housing 6, and the housing 6 is rectangular apparatus wall box, the top surrounded by four sides steel plate
The closing space of lid 16 and multiple bottom ash buckets 4 composition.Housing 6 is fixed by supporting leg 1 and supported.The middle and upper part of the housing 6
Multiple two-fluid shower nozzles 11 are disposed with, it is circular flue 7, the fume pipe that the inside center of housing 6, which is provided with section,
The air inlet in road 7 is through the lower sides of the housing 6 and the side wall of the lateral wall of the flue 7 and the housing 6 is close
Envelope connection, the gas outlet of the flue 7 is arranged on the top of the two-fluid shower nozzle 11 and connected with the enclosure interior.
The lower sidewall of the housing 6, which is provided with exhanst gas outlet 5, the exhanst gas outlet 5, to be provided with for detecting that desulfurizer is handled
The SO of the sulfur dioxide concentration in flue gas afterwards2Sensor 54.It is understood that the exhanst gas outlet 5 of the lower sidewall of housing 6 is used
Flue gas feeding subordinate sack cleaner after by desulfurization carries out dust removal process.
The pneumatic ash conveying plant includes being arranged on the Pneumatic ash conveying pipeline below the ash bucket.Ash bucket 4 is shaped as Lou
Bucket shape, the discharging opening of infundibulate ash bucket 4 is provided with star-shaped discharge valve 3.(star-shaped discharge valve 3 can realize ash bucket 4 and sky in housing
Between sealing simultaneously again the dust in ash bucket 4 can smoothly be discharged) the Pneumatic ash conveying pipeline include by Pneumatic ash conveying compression
Pneumatic ash conveying Trunk Line 2 that air line 30 is connected with compressed air reservoir 24 and the respectively discharging opening with multiple ash buckets 4
Many Pneumatic ash conveying by-pass lines 27 being connected, many Pneumatic ash conveying by-pass lines 27 are connected with the Pneumatic ash conveying Trunk Line 2.
The function of the pneumatic ash conveying plant is the feed bin that the ash for discharging star-shaped discharge valve 3 is transported to distal end.It is to be appreciated that, in order to
Control to be provided with Pneumatic ash conveying compression sky on the compressed air on Pneumatic ash conveying pipeline, the Pneumatic ash conveying compressed-air line 30
Gas pulse valve 29 and Pneumatic ash conveying compressed air pressure-reducing valve 28.
The alkali lye feeding mechanism includes setting at least one lye tank of storage sodium hydrate aqueous solution, the lye tank
Liquid level sensor is equipped with, the lye tank is connected by transfer line with the liquid-inlet of the two-fluid shower nozzle 11, described defeated
Frequency conversion lye pump 46 is provided with liquid pipe line.Lye tank is used for configuring and storing sodium hydrate aqueous solution, and liquid level sensor can
The liquid level in lye tank is detected, and signal is sent to control device, frequency conversion lye pump 46 being capable of giving according to control device
The signal timely adjustment gone out is supplied to the alkali lye amount of two-fluid shower nozzle.
The compressed air supply system mainly includes compressed air reservoir 24, air compressor 26, and the compression is empty
Gas air accumulator 24 passes through respectively with the compressed air inlet of the two-fluid shower nozzle 11, Pneumatic ash conveying Trunk Line 2 and lye tank
Pipeline is connected.The one side of compressed air reservoir 24 is that two-fluid shower nozzle 11 provides the compressed air needed, meanwhile, also it is strength
Defeated grey Trunk Line 2 provides wind-force and blows out dust fallen into ash bucket etc. by compressed air；Compressed air is transported to lye tank
Effect be in order to stir the liquid in lye tank, to promote the sodium hydroxide lye in lye tank to be well mixed.
The control device and the SO2Sensor 54, liquid level sensor and frequency conversion lye pump 46 are electrically connected.Control
Device processed can be according to SO2The sulfur dioxide concentration that sensor 54 is detected controls the operating speed of frequency conversion lye pump 46 as feedback signal
Degree, so that the consumption of intelligent control alkali lye, realizes the reasonable utilization of alkali lye, reduces production cost；Control device also has simultaneously
The liquid level signal transmitted according to liquid level sensor is sent out instruction, reminds the change of liquid level in operating personnel's lye tank, so that
Operating personnel are facilitated to carry out corresponding operating.
The present embodiment sodium base spray dry desulfurization system, by the use of sodium hydrate aqueous solution as desulfurizing agent, and utilizes double fluid
Body shower nozzle 11 will sodium hydrate aqueous solution and high pressure air mix after sprayed from the nozzle of two-fluid shower nozzle, during ejection because
There is larger speed difference between air-flow and liquid stream, swiftly flowing high pressure air tears up the liquid film in liquid flow, moment
Make the micron order drop that sodium hydrate aqueous solution quantity of formation is huge, the micron order sodium hydrate aqueous solution drop tool of enormous amount
There is great specific surface area, the sulfur dioxide in flue is concurrent with ultra-fine sodium hydrate aqueous solution drop contact rapidly
Biochemical hair should generate microgranular sodium sulfite or sodium sulphate drop；Microgranular sodium sulfite or sodium sulphate drop continues with flue gas
Run in housing, the moisture under high-temperature flue gas effect in ultra-fine sodium hydrate aqueous solution drop evaporates rapidly, surplus materials
Drying forms solid particle shape sodium sulfite or sodium sulphate particulate.Solid particle shape sodium sulfite or a sodium sulphate part are with flue gas
Entered by the exhanst gas outlet 5 on housing 6 and be removed after subordinate's sack cleaner, a part is fallen into the ash bucket 4 of bottom,
And go out through Pneumatic ash conveying pipelined outside system.
Meanwhile, the setting flue 7, one side cigarette inside housing 6 of the present embodiment sodium base spray dry desulfurization system
Feed channel 7 can realize that flue gas enters after case top from the bottom of housing 6, be arranged again from the bottom of housing 6 after reverse deceleration
Go out, slow down the flowing velocity of flue gas, promote the reactive absorption of the sulfur dioxide and sodium hydrate aqueous solution in flue gas；Simultaneously
Flue 7 can maintain the state of high temperature in housing 6, promote microgranular sodium sulfite to provide certain heat in housing 6
Or sodium sulphate drop flashes to solid-state.
The present embodiment sodium base spray dry desulfurization system, as desulfurizing agent, is taken off using sodium hydrate aqueous solution relative to other
Sulphur agent, solubility of the sodium hydroxide in water it is high (such as at 20 DEG C, 1 kg of water can be completely dissolved 1.09 kilograms of sodium hydroxides,
And at 20 DEG C, 1 kg of water is only completely dissolved 0.0016 kilogram of calcium hydroxide, the two solubility differs 630 times), it is possible to
The sodium hydrate aqueous solution of high concentration is as desulfurizing agent required for configuration, and the configuration in the solution used than other sulfur methods makes
Water consumption is less, configuration process is simple, and cost is relatively low.
The present embodiment sodium base spray dry desulfurization system is compared with conventional wet desulfurization technology：Due to using sodium hydroxide water
Solution does not result in equipment and sets liquid-transport pipe-line fouling and obstruction as desulfurizing agent；Due to sulfur dioxide and ultra-fine sodium hydroxide water
The final product of solution droplets is solid particle shape sodium sulfite or sodium sulphate, so rich solution will not be produced, it is to avoid at rich solution
The trouble of reason；Hair can also occur with ultra-fine sodium hydrate aqueous solution drop and answer final product to be microgranular for sulfur trioxide in flue gas
Sodium sulphate, so sulfur trioxide is solved in low temperature, the problem of sulfuric acid droplet corrodes and worn and torn to equipment inner wall；The present invention
Sodium oxide molybdena is water-soluble because solubility is high, and solution usage is few, while drop, which is atomized rear particle diameter, reaches micron order, so unreacted
Sodium hydroxide solution drop can also be dried rapidly in the presence of later stage high-temperature flue gas, so sodium base of the present invention spray drying is de-
The problem of sulphur system never produces white cigarette mist.
Sodium base spray dry desulfurization system of the present invention is compared with lime slurry spray drying Wet Flue Gas Desulfurization Technique：Sodium hydroxide
The aqueous solution is as desulfurizing agent, and it obtains technique than simple, reduces production cost, and sodium hydrate aqueous solution will not produce pump,
The problem of pipeline and spray assembly block.
As shown in figure 1, as one embodiment of the present of invention, the head clearance certain distance of flue 7 is provided with circle
Conical flow guiding lid 15, the fairing cap 15 is welded to connect with the top of flue 7 by fairing cap pillar 14.
It is understood that flue gas uniform and stable can be guided to around flue by fairing cap 15, it is easy to cigarette
Gas uniform and stable flows downwardly to the bottom of housing 6.
As shown in figure 1, in order to further realize the steady of flue gas, the middle and upper part of the housing 6 is provided with two layers of honeycomb screen
Grid, respectively upper strata flow straightening grid 13 and lower floor's flow straightening grid 8, upper strata flow straightening grid 13 and lower floor's flow straightening grid 8 are by steel
The grid with certain length that plate is welded, its outside and the inwall of housing 6 are welded to connect.
Multiple two-fluid shower nozzles 11 are arranged between upper strata flow straightening grid 13 and lower floor's flow straightening grid 8, specific setting side
Formula is as shown in Figure 1,3：Transfer line and injection gas transmission line are provided between upper strata flow straightening grid 13 and lower floor's flow straightening grid 8,
Wherein transfer line includes the injection alkali lye Trunk Line 21 connected with lye tank, the injection being connected on injection alkali lye Trunk Line 21
Branch road alkali liquor pipe 9, the feed flow connection short tube 10 being connected on injection branch road alkali liquor pipe 9, feed flow connection short tube 10 are ultimately connected to
Alkali lye is transported in two-fluid shower nozzle 11 by the bottom of two-fluid shower nozzle 11；Spray the switch valve that alkali lye bypass valve 18 is the branch road；
Injection gas transmission line include connected with compressed air reservoir injection compressed air Trunk Line 20, be connected to injection compressed air
Injection branch road compressed air hose 12 on Trunk Line 20, the compressed air connection being connected on injection branch road compressed air hose 12 are short
Pipe 51, compressed air connection short tube 51 is ultimately connected to the side of two-fluid shower nozzle 11 and delivers compressed air to two-fluid shower nozzle 11
It is interior, the decompression and switch valve of injection branch road compressed air pressure-reducing valve 17, injection compressed air bypass valve 19 for the branch road.
The jet of the two-fluid shower nozzle 11 is set towards top, namely：Two-fluid shower nozzle sprays alkali lye upwards, double fluid
The bottom of body shower nozzle 11 is liquid-inlet and connects short tube 10 by feed flow and spray branch road alkali liquor pipe 9 to connect, the two-fluid
The side of shower nozzle 11 (air inlet) connects short tube 51 by compressed air and injection branch road compressed air hose 12 is connected.Wherein, every
Multiple two-fluid shower nozzles 11 can be installed on bar injection branch road alkali liquor pipe 9 and injection branch road compressed air hose 12, while spraying branch road
Alkali liquor pipe 9 and injection branch road compressed air hose 12 are also constituted by many.
It should be noted that injection branch road compressed air pressure-reducing valve 17 and injection compressed air bypass valve 19 are arranged on injection
The input of branch road compressed air hose 12, injection alkali lye bypass valve 18 is arranged on the input of injection branch road alkali liquor pipe 9, the spray
Penetrating branch road compressed air pressure-reducing valve 17 and injection compressed air bypass valve 19 and injection alkali lye bypass valve 18 is used to adjust the branch road
The spray regime of multiple two-fluid shower nozzles 11.Each injection branch road compressed air hose 12 passes through welding and injection compressed air Trunk Line
20 be connected, respectively injection branch road alkali liquor pipe 9 be connected by welding with spraying alkali lye Trunk Line 21.
It is understood that two-fluid shower nozzle is set by the way of being sprayed towards top, the hydrogen after atomization can be slowed down
The flow velocity of sodium oxide molybdena drop, promotes the sulfur dioxide and sodium hydroxide drop reactive absorption in flue gas.
As shown in figure 1, as one embodiment of the present of invention, the lye tank includes two, it is respectively that four sides is stainless
The rectangular box that steel plate is surrounded, bottom is closed by stainless steel plate, top is unlimited, is respectively defined as the first lye tank 43 and second
It (is respectively the first liquid level sensor 52, the second liquid level sensor that liquid level sensor is provided with lye tank 44, each lye tank
62), the control device is respectively connected with the liquid level sensor in frequency conversion lye pump and each lye tank.
It is understood that lye tank is preferably two, it can be consumed in the sodium hydrate aqueous solution in a lye tank
When complete, another lye tank is switched to, and new alkali lye is configured in the lye tank for consumed alkali lye, it is achieved thereby that sweetening process
Be carried out continuously.
As shown in figure 1, as one embodiment of the present of invention, alkali lye is configured for convenience, the spraying of the present embodiment sodium base is dry
Dry desulphurization system also includes clear water pipeline, and the detergent line includes clear water Trunk Line 45, and the clear water Trunk Line 45 leads to respectively
The first lye tank clear water water injection pipe 40, the second lye tank clear water water injection pipe 42 are crossed into the first lye tank 43, the second lye tank 44
Water filling, and in order to realize on the control of current, the first lye tank clear water water injection pipe 40, the second lye tank clear water water injection pipe 42
It is respectively arranged with the first lye tank clear water water injection valve 39, the second lye tank clear water water injection valve 41.
Pass through the first lye tank compressed air stirring pipe 35, the second alkali in first lye tank 43, the second lye tank 44 respectively
Liquid case compressed air stirring pipe 36 is passed through compressed air, and in order to control the circulation of compressed air that is passed through in each lye tank and
The first lye tank stirring air pressure switch valve 32, the are provided with flow velocity, the first lye tank compressed air stirring pipe 35
The stirring of the second lye tank is provided with one lye tank stirring compressed air pressure-reducing valve 34, the second lye tank compressed air stirring pipe 36
Air pressure switch valve 31, the second lye tank stirring compressed air pressure-reducing valve 33.
As shown in figure 1, as a kind of arrangement of frequency conversion lye pump, frequency conversion lye pump 46 is arranged on injection alkali lye supervisor
On line 21, injection alkali lye Trunk Line 21 is distinguished by the second lye tank feed pipe 49 before the first lye tank feed pipe 47, pump before pump
Connected with the first lye tank 43, the second lye tank 44 and feed liquor, and in order to control the first alkali lye before the conducting of feed pipe, the pump
It is respectively arranged with before case feed pipe 47, pump on the second lye tank feed pipe 49 before pump before the first lye tank feed flow switch valve 48, pump
Second lye tank feed flow switch valve 50.
As shown in figure 1, cleaning alkali lye transfer pipeline and two-fluid shower nozzle 11 for convenience, clear water Trunk Line 45 is also set up
There is the clear water connected with injection alkali lye Trunk Line 21 to clean on pipe 37, the clear water cleaning pipe 37 and be provided with clear water purge valve 38.
The compressed air supply system includes compressed air reservoir 24 and passes through air compressor export pipeline 25
There is provided to the compressed air reservoir 24 on the air compressor 26 of compressed air, the outlet line of compressed air reservoir 24
It is provided with the main pressure-reducing valve 22 of compressed air, compressed air main switching valve 23.Compressed air outlet pipeline is divided into three tunnels respectively to spray
Penetrate compressed air Trunk Line 20, Pneumatic ash conveying compressed-air line 30, the first lye tank compressed air stirring pipe 35 and the second alkali
Liquid case compressed air stirring pipe 36 provides compressed air.
As shown in fig. 6, the control device can be master element with HNI touch-screens microprocessor 56, SO2 sensors 54,
First lye tank liquid level sensor 52, the second lye tank liquid level sensor 62 input the micro- place of HNI touch-screens by signal wire respectively
Manage in device 56, after identified calculating, output control signal is to frequency converter 60, the first audible-visual annunciator 57 and the second audible-visual annunciator
58 implement control and alarm.Its operation principle is：If exporting SO2Sensor 54 measures the SO in smoke outlet flue gas after desulfurization2
When concentration value is higher than setting value, by exporting SO2Concentration signal is inputted HNI touch-screens microprocessor 56 by sensor signal lines 55
In, then the frequency converter 60 by control signal to frequency conversion lye pump, increases output frequency, improves turning for frequency conversion lye pump 46
Speed, reaches the flow for the alkali lye that increase alkali lye supply system is provided to two-fluid shower nozzle 11, final to realize reduction smoke outlet
SO in flue gas after desulfurization2Concentration；If conversely, outlet SO2Sensor 54 measures the SO in outlet flue gas after desulfurization2Concentration value is low
When setting value, by exporting SO2Sensor signal lines 55 input concentration signal in HNI touch-screens microprocessor 56, through meter
Calculate processing and then send frequency converter 60 of the control signal to frequency conversion lye pump, reduce output frequency, reduction frequency conversion lye pump 46
Rotating speed, reaches the flow for reducing the alkali lye that alkali lye supply system is provided to spraying system, and final realize reduces the consumption of alkali lye,
The use cost of reduction system.In addition, when the first lye tank 43 implements water filling, when clear water liquid level reaches setting position, the
One audible-visual annunciator 57 sends sound and light signal, reminds operating personnel to close the first lye tank clear water water injection valve 39；In the second alkali lye
When case 44 implements water filling, when clear water liquid level reaches setting position, the second audible-visual annunciator 58 sends sound and light signal, reminds operation
Personnel close the second lye tank clear water water injection valve 41.When normal desulfurization works, if the first lye tank 43 is to two-fluid shower nozzle 11
When supplying alkali lye, when the sodium hydrate aqueous solution being stored in the first lye tank 43 is depleted to liquid level as little as setting value, first
Audible-visual annunciator 57 sends sound and light signal, reminds operating personnel to close the first lye tank feed flow switch valve 48 before pump, opens before pump
Second lye tank feed flow switch valve 50, is converted into the second lye tank 44 and supplies alkali lye to spraying system；Equally when the second lye tank
44 to two-fluid shower nozzle 11 supply alkali lye when, when the sodium hydrate aqueous solution being stored in the second lye tank 44, to be depleted to liquid level low
During to setting value, the second audible-visual annunciator 58 sends sound and light signal, reminds operating personnel to close the second lye tank feed flow before pump and opens
Valve 50 is closed, the first lye tank feed flow switch valve 48 before pump is opened, the first lye tank 43 is converted into and supplies alkali lye to spraying system.
In Fig. 6, label 53 refers to the first liquid level sensor signal wire, and 59 refer to power supply, and 61 refer to the second liquid level
Sensor signal lines.
In summary, the present embodiment sodium base spray dry desulfurization system solve in existing desulfurization technology fouling and block,
Rich solution is difficult to handle, corrode and wear and tear and formed the insoluble problem such as white cigarette mist.Meanwhile, with calcium base spray dry desulfurization work
Process is compared, and pulping process complexity, the one-time investment for solving calcium base spray dry desulfurization technique are high, pump, pipeline and spray
The problems such as mist device is blocked.In addition, when in use, the present embodiment sodium base spray dry desulfurization system is than other desulfurization method phases
Than desulfuration efficiency is high, and floor space is small, and water saving, energy-saving effect are notable.
The concrete application embodiment of the present invention is given below
The present embodiment sodium base spray dry desulfurization system is used to handle air quantity for 260000m3/ h, flue-gas temperature is 165 DEG C,
Amount of sulfur contenting in smoke is 750mg/Nm3Flue gas.The appearance and size of desulfurizer housing be length × width × height=8000mm ×
8000mm×21000mm。
When it is implemented, alkali lye preparation is carried out first, in the first lye tank 43 and capacity that capacity is 12 cubic metres
800kg flaky sodium hydrate solids are delivered to be each in 12 cubic metres of the second lye tank 44, the first alkali lye is then separately turned on
Case clear water water injection valve 39 and the second lye tank clear water water injection valve 41, clear water is filled to the first lye tank 43 and the second lye tank 44；
Adding amount per case is 8 cubic metres, and when clear water filling reaches setting position, the first audible-visual annunciator 57 sends acousto-optic letter
Number, remind operating personnel to close the first lye tank clear water water injection valve 39；When the second lye tank 44 implements water filling, when clear water liquid level
When reaching setting position, the second audible-visual annunciator 58 sends sound and light signal, reminds operating personnel to close the second lye tank clear water note
Water valve 41；Now, when the pressure tabular value on unlatching air compressor 26, the main pressure-reducing valve 22 of air to be compressed reaches setting, open
Compressed air main switching valve 23 is opened, being then turned on the first lye tank stirring air pressure switch valve 32 (should be according to the when using first
Liquid level rolling situation adjustment the first lye tank stirring compressed air pressure-reducing valve 34 reaches appropriate blender gas in one lye tank 43
Pressure), pneumatic stirring is carried out to the liquid in the first lye tank 43, treats flaky sodium hydrate solid all untill dissolving.Open
Second lye tank stirring air pressure switch valve 31 (should be according to liquid level rolling situation adjustment in the second lye tank 44 when using first
Second lye tank stirring compressed air pressure-reducing valve 33 reaches appropriate stirring air pressure), the liquid in the second lye tank 44 is carried out
Pneumatic stirring, treats flaky sodium hydrate solid all untill dissolving.Now alkali lye preparation terminates.
During system life's work (if it is determined that first supplying alkali lye to two-fluid shower nozzle with the first lye tank 43), open the before pump
One lye tank feed flow switch valve 48, closes the second lye tank feed flow switch valve 50 before pump, connects the power supply 59 of control device, opens
When pressure tabular value on air compressor 26, the main pressure-reducing valve 22 of air to be compressed reaches setting, compressed air main switch is opened
Valve 23.Each system of sodium base spray drying devulcanizer is set to be in normal operating conditions.Now, the high-temperature flue gas of sulfur-bearing is in air inducing
Risen under the driving of machine by flue 7 and reach the top of flue 7, because of effect of inertia, high-temperature flue gas stream can hit setting
Fairing cap 15 in the top of flue 7, makes high-temperature flue gas stream flow downward, and has certain length via welded steel plate
The rectification of upper strata flow straightening grid 13 of grid, enables high-temperature flue gas stream to compare uniformly across by injection branch road alkali liquor pipe 9, feed flow company
Connect short tube 10, two-fluid shower nozzle 11, injection branch road compressed air hose 12, injection branch road compressed air pressure-reducing valve 17, injection compression
Air passage valve 19, injection alkali lye bypass valve 18, compressed air connection short tube 51, spraying system compressed air Trunk Line 20 and spray
Penetrate the spraying system of the composition of alkali lye Trunk Line 21.
Under the driving of frequency conversion lye pump 46, sodium hydrate aqueous solution flows out from the first lye tank 43, through the first alkali before pump
First lye tank feed flow switch valve 48, frequency conversion lye pump 46, injection alkali lye Trunk Line 21, injection branch before liquid case feed pipe 47, pump
Reached after road alkali liquor pipe 9, feed flow connection short tube 10 in two-fluid shower nozzle 11；It is simultaneously defeated through air compressor 26, air compressor
Go out the main pressure-reducing valve 22 of pipeline 25, compressed air reservoir 24, compressed air, compressed air main switching valve 23, injection compressed air
High pressure air after Trunk Line 20, injection branch road compressed air hose 12, compressed air connection short tube 51 also reaches two-fluid
In shower nozzle 11.The spray of sodium hydrate aqueous solution and high pressure air in two-fluid shower nozzle 11 after mixing from two-fluid shower nozzle 11
Sprayed at mouthful, because there is huge speed difference between air-flow and liquid stream during ejection, swiftly flowing high pressure air can be by liquid
Liquid film in body stream is torn up, and moment makes the huge micron order drop of sodium hydrate aqueous solution quantity of formation, these enormous amounts
Micron order drop forms uniform sodium hydrate aqueous solution fog-zone in injection region, when high-temperature flue gas passes through this piece fog-zone
When, because the micron order sodium hydrate aqueous solution drop of enormous amount has great specific surface area, now, in high-temperature flue gas
SO2Occur following chemically react with sodium hydroxide in ultra-fine sodium hydrate aqueous solution drop rapidly：
SO2+2NaOH→Na2SO3+H2O
Na2SO3+H2O+SO2→2NaHSO3
NaHSO3+NaOH→Na2SO3+H2O
Na2SO3+1/2O2→Na2SO4
End reaction thing is microgranular sodium sulfite or sodium sulphate drop.These drops continue to transport in device with flue gas
OK, drying forms solid-state sodium sulfite or sodium sulphate particle under high-temperature flue gas effect, these solid-state sodium sulfites or sodium sulphate
A part for particle is removed in the sack cleaner of rear class with cigarette ash, and another part falls into the ash bucket 4 of device bottom
In, it is transported to through star-shaped discharge valve 3, Pneumatic ash conveying branch spool 27, Pneumatic ash conveying Trunk Line 2 in the ash silo of distal end.Pneumatic ash conveying
The active force of system is through air compressor 26, air compressor export pipeline 25, compressed air reservoir 24, compressed air master
Pressure-reducing valve 22, compressed air main switching valve 23, Pneumatic ash conveying compressed-air line 30, Pneumatic ash conveying compressed air pressure-reducing valve 28,
The high pressure air of Pneumatic ash conveying pulse of compressed air valve 29.Through above-mentioned processing, most SO in high-temperature flue gas2Gone
Remove, realize the purpose of sulfur dioxide in efficient removal high-temperature flue gas.
Operationally, control system complete work be：If exporting SO2Sensor 54 is measured at exhanst gas outlet 5 after desulfurization
SO in flue gas2When concentration value is higher than setting value, by exporting SO2Concentration signal is inputted HNI touch-screens by sensor signal lines 55
In microprocessor 56, it is computed handling and then sends control signal to frequency converter 60, increase output frequency, improve frequency conversion lye pump
46 rotating speed, reaches the flow for the alkali lye that increase alkali lye supply system is provided to spraying system, final to realize reduction exhanst gas outlet
SO at de- 5 after sulphur in flue gas2Concentration, if conversely, outlet SO2Sensor 54 is measured at exhanst gas outlet 5 in flue gas after desulfurization
SO2Concentration value is less than when setting value, by exporting SO2Concentration signal is inputted HNI touch-screen microprocessors by sensor signal lines 55
In device 56, then it is computed sending control signal after processing to frequency converter 60, reduces output frequency, reduction frequency conversion lye pump 46
Rotating speed, reaches the flow for reducing the alkali lye that alkali lye supply system is provided to spraying system, and final realize reduces the consumption of alkali lye,
The use cost of reduction system.In addition, when the first lye tank 43 implements water filling, when clear water liquid level reaches setting position, the
One audible-visual annunciator 57 sends sound and light signal, reminds operating personnel to close the first lye tank clear water water injection valve 39；In the second alkali lye
When case 44 implements water filling, when clear water liquid level reaches setting position, the second audible-visual annunciator 58 sends sound and light signal, reminds operation
Personnel close the second lye tank clear water water injection valve 41；When normal desulfurization works, if the first lye tank 43 is supplied to two-fluid shower nozzle
When answering alkali lye, when the sodium hydrate aqueous solution being stored in the first lye tank 43 is depleted to liquid level as little as setting value, the first sound
Light crossing-signal 57 sends sound and light signal, reminds operating personnel to close the first lye tank feed flow switch valve 48 before pump, opens before pump the
Two lye tank feed flow switch valves 50, are converted into the second lye tank 44 and supply alkali lye to two-fluid shower nozzle 11；Equally when the second alkali lye
Case 44 to two-fluid shower nozzle supply alkali lye when, when the sodium hydrate aqueous solution being stored in the second lye tank 44, to be depleted to liquid level low
During to setting value, the second audible-visual annunciator 58 sends sound and light signal, reminds operating personnel to close the second lye tank feed flow before pump and opens
Valve 50 is closed, the first lye tank feed flow switch valve 48 before pump is opened, the first lye tank 43 is converted into and supplies alkali lye to two-fluid shower nozzle.
In blowing out, frequency conversion lye pump 46 is stopped, now, closes the first lye tank clear water water injection valve 39 and the second alkali
Liquid case clear water water injection valve 41；Clear water purge valve 38 is opened, cleaning clear water cleans pipe 37, injection alkali lye Trunk Line 21, spray through clear water
Reached after penetrating branch road alkali liquor pipe 9, feed flow connection short tube 10 in two-fluid shower nozzle 11, it is defeated through air compressor 26, air compressor
Go out the main pressure-reducing valve 22 of pipeline 25, compressed air reservoir 24, compressed air, compressed air main switching valve 23, injection compressed air
High pressure air after Trunk Line 20, injection branch road compressed air hose 12, compressed air connection short tube 51 also reaches two-fluid
In shower nozzle 11.Clean the nozzle spray from two-fluid shower nozzle 11 after clear water and high pressure air are mixed in two-fluid shower nozzle 11
Go out, after running 20 minutes, sodium hydrate aqueous solution remaining in alkali lye feeding mechanism, transfer line is cleaned completely after whole pump
Totally, it is to avoid remaining sodium hydrate aqueous solution, which is dried, to be separated out solid NuaO and cause the stifled of liquid-supplying system and spraying system
Plug, be next blow-on be ready,
Through final detection, the SO in smoke outlet, flue gas2Concentration be only 21mg/Nm3, remove SO2Efficiency be
97.2%.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. a kind of sodium base spray dry desulfurization system, it is characterised in that：The system include desulfurizer, alkali lye feeding mechanism,
Pneumatic ash conveying plant, compressed air supply system and control device,
The middle and upper part that the desulfurizer is included in sealed housing, the housing is provided with multiple two-fluid shower nozzles, the shell
The lower end of body, which is connected with ash bucket, the housing, is provided with flue, and the air inlet of the flue passes through the housing
Lower sides and the side wall of the lateral wall of the flue and the housing be tightly connected, the gas outlet of the flue
It is arranged on the top of the two-fluid shower nozzle and with being connected in the housing, flue gas is additionally provided with the lower sides of the housing
SO is provided with outlet, the exhanst gas outlet2Sensor,
The Pneumatic ash conveying component includes being arranged on the Pneumatic ash conveying pipeline below the ash bucket,
The alkali lye feeding mechanism includes setting at least one lye tank for storing sodium hydrate aqueous solution, the lye tank
There is liquid level sensor, the lye tank is connected by transfer line with the liquid-inlet of the two-fluid shower nozzle, the woven hose
Frequency conversion lye pump is provided with line,
The compressed air supply system includes air compressor and compressed air reservoir, the compressed air reservoir and institute
The air intlet, Pneumatic ash conveying pipeline and lye tank for stating two-fluid shower nozzle are connected by pipeline respectively,
The control device and the SO2Sensor, liquid level sensor and frequency conversion lye pump are electrically connected.
2. sodium base spray dry desulfurization system according to claim 1, it is characterised in that：The lye tank is two, two
Individual lye tank is standby each other, is provided with each lye tank in liquid level sensor, the control device and each lye tank
Liquid level sensor is respectively connected with.
3. sodium base spray dry desulfurization system according to claim 1, it is characterised in that：The ash bucket is in infundibulate, institute
Stating ash bucket includes being arranged in several below the housing, and the discharging opening of each ash bucket is provided with star-shaped discharge valve,
The Pneumatic ash conveying pipeline includes the Pneumatic ash conveying Trunk Line connected with the compressed air reservoir and is connected each
The Pneumatic ash conveying by-pass line of the discharging opening of ash bucket, the Pneumatic ash conveying Trunk Line is connected with the Pneumatic ash conveying by-pass line and to institute
State conveying compressed air in Pneumatic ash conveying by-pass line.
4. sodium base spray dry desulfurization system according to claim 1, it is characterised in that：The correspondence cigarette in the housing
Conical fairing cap is provided with above the gas outlet of feed channel.
5. sodium base spray dry desulfurization system according to claim 1, it is characterised in that：In the upper space of the housing
Upper and lower two layers of flow straightening grid is provided with, the two-fluid shower nozzle is arranged between two layers of flow straightening grid；
The jet of the two-fluid shower nozzle is set towards top.
6. sodium base spray dry desulfurization system according to claim 1, it is characterised in that：The transfer line includes and institute
State the injection alkali lye Trunk Line of lye tank connection and many injection branch road alkali lye being connected on the injection alkali lye Trunk Line
Pipe,
Connect the two-fluid shower nozzle includes connecting with the compressed air reservoir with the pipeline of the compressed air reservoir
Injection compressed air Trunk Line and with many injection branch road compressed air hoses being connected of injection compressed air Trunk Line,
The air inlet of each two-fluid shower nozzle connects short tube by compressed air and connected with the injection branch road compressed air hose
Logical, the liquid-inlet of each two-fluid shower nozzle connects short tube by feed flow and connected with the injection branch road alkali liquor pipe.
7. sodium base spray dry desulfurization system according to claim 6, it is characterised in that：It is described injection alkali lye Trunk Line with
Two lye tanks are connected by lye tank supply pipe before pump respectively, are provided with before every pump on lye tank supply pipe before pump
Lye tank feed flow switch valve, the frequency conversion lye pump is arranged on the injection alkali lye Trunk Line.
8. sodium base spray dry desulfurization system according to claim 7, it is characterised in that：Also include detergent line, it is described
Detergent line includes clear water Trunk Line, and the clear water Trunk Line is divided into three road outlet pipes, respectively clear water cleaning pipe, two alkali lye
Case clear water water injection pipe, the clear water cleaning pipe is upper and two lye tank clear water water injection pipes are respectively arranged with control water conduction
Water injection valve,
The delivery port of the clear water cleaning pipe is connected with the injection alkali lye Trunk Line, the water outlet of two lye tank clear water water injection pipes
Mouth is corresponded with two lye tanks and connected.
9. sodium base spray dry desulfurization system according to claim 6, it is characterised in that：The compressed air reservoir
Outlet is provided with the main pressure-reducing valve of compressed air and compressed air main switching valve,
The inlet end of the injection branch road compressed air hose is provided with injection compressed air bypass valve and injection branch road compressed air
Pressure-reducing valve,
The compressed air reservoir is connected by lye tank compressed air stirring pipe with the lye tank, the lye tank compression
Lye tank stirring compressed air pressure-reducing valve and lye tank stirring air pressure switch valve are provided with air stirring pipe；
The compressed air reservoir is connected by Pneumatic ash conveying compressed-air line with the Pneumatic ash conveying pipeline, the strength
Pneumatic ash conveying pulse of compressed air valve and Pneumatic ash conveying compressed air pressure-reducing valve are provided with defeated grey compressed-air line.
10. the sodium base spray dry desulfurization system according to claim any one of 1-9, it is characterised in that：The control dress
It is set to HNI touch-screen microprocessors, the HNI touch-screens microprocessor and the SO2Sensor, frequency conversion lye pump difference
Electrically connect and according to SO2The feedback signal of sensor controls the rotating speed of the frequency conversion lye pump,
The HNI touch-screens microprocessor is connected with the liquid level sensor, and the HNI touch-screens microprocessor is also connected with sound
Light crossing-signal, the HNI touch-screens microprocessor is sent out according to the feedback signal of the liquid level sensor to the audible-visual annunciator
Send control instruction.
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Effective date of registration: 20200817 Address after: 601, unit 6, building 7, jianxiyuan Zhongli, Haidian District, Beijing 100043 Applicant after: Bao Chensheng Address before: Unit 601, unit 6, building 7, jianxiyuan Zhongli, Haidian District, Beijing 100054 Applicant before: SHANDONG BAOAIER ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
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Application publication date: 20170725 |