CN107617316A - A kind of full-automatic laminar flow screw spraying high-efficiency desulfurization system - Google Patents
A kind of full-automatic laminar flow screw spraying high-efficiency desulfurization system Download PDFInfo
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 65
- 238000005507 spraying Methods 0.000 title claims abstract description 65
- 230000023556 desulfurization Effects 0.000 title claims abstract description 47
- 239000002002 slurry Substances 0.000 claims abstract description 80
- 239000007921 spray Substances 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 239000006028 limestone Substances 0.000 claims description 51
- 235000019738 Limestone Nutrition 0.000 claims description 50
- 239000007788 liquid Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 16
- 238000010521 absorption reaction Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 8
- 238000004090 dissolution Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 229910052717 sulfur Inorganic materials 0.000 claims description 7
- 239000011593 sulfur Substances 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 239000000523 sample Substances 0.000 claims description 4
- 238000004062 sedimentation Methods 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 239000002250 absorbent Substances 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 3
- -1 close Degree Substances 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims 1
- 235000019504 cigarettes Nutrition 0.000 claims 1
- 238000002386 leaching Methods 0.000 claims 1
- 210000002966 serum Anatomy 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 50
- 230000008569 process Effects 0.000 abstract description 21
- 230000001105 regulatory effect Effects 0.000 abstract description 5
- 239000003245 coal Substances 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 22
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 22
- 239000003546 flue gas Substances 0.000 description 22
- 238000005516 engineering process Methods 0.000 description 9
- 230000003009 desulfurizing effect Effects 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000005864 Sulphur Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000010440 gypsum Substances 0.000 description 5
- 229910052602 gypsum Inorganic materials 0.000 description 5
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Inorganic materials O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 238000003916 acid precipitation Methods 0.000 description 4
- 239000000443 aerosol Substances 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical group [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- PFRUBEOIWWEFOL-UHFFFAOYSA-N [N].[S] Chemical compound [N].[S] PFRUBEOIWWEFOL-UHFFFAOYSA-N 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 235000010261 calcium sulphite Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical group 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Abstract
A kind of full-automatic laminar flow screw spraying high-efficiency desulfurization system, is related to a kind of desulphurization system, and the system includes pH value automatic regulating system and laminar flow for paste system, screw spraying system three parts；Laminar flow includes upper box for slurry case（1）, lower box（3）, 10 100 laminar flow pipes are distributed with inside（2）, upper and lower box house is distributed with 2 12 closed chambers, overturns slurries up and down 3 10 times；Screw spraying system is made up of 25 helical layer spraying layers, is 100 500mm per helical layer spacing, and spiral angle is 30 60 °, individual layer spray head quantity 40 200.The system includes pH value automatic regulating system and laminar flow for paste system, screw spraying system three parts.Improve the wet process of FGD processing of existing steel plant, coal fired thermal power plant, while investment is low needed for the present invention, it is quick, desulfuration efficiency is improved, there is higher economic value.
Description
Technical field
The present invention relates to a kind of desulphurization system, more particularly to a kind of steel plant, the WFDG wet flue gas of coal fired thermal power plant
The process system of the full-automatic laminar flow and screw spraying desulphurization denitration regulation of desulfurization process.
Background technology
As industry grows continuously and fast, the coal-fired consumption in China turns into the first in the world, thus brings sulphur, nitrogen oxides
Etc. a large amount of discharges of harmful substance, problem of environmental pollution becomes increasingly conspicuous caused by SO2 is discharged.Sulfur dioxide, the nitrogen oxygen of excess
Compound forms the acid rain of large area, and acid rain is one of overall situation problem of the world today three.Due to SO2 in flue gas caused by fuel
It is the main reason for forming acid rain, countries in the world are all using flue gas desulfurization as control SO2Pollution, the main skill of preventing and treating acid rain harm
Art means.
Flue gas desulfurization technique is calculated, and is respectively：Limestone wet-process, in-furnace calcium spraying afterbody humidification method, rotating spraying are done
Dry method, simply wet constructed, wet-type ammonia, electronic beam method.But pass through multiple scholars and expert's practice, such as Guangxi University Lee such as
Fine jade passes through multiple data analyses, and WFGD limestone wet-process is optimal method, and not smaller than other method gaps.China at present
And the sulfur removal technology of the state such as America and Europe more than 90% uses WFGD wet fuel gas desulfurizing technologies.
Although wet process of FGD is maturation process, but be related to factors：（1）Lime stone storing and transporting system,（2）Lime
Stone slurries prepare and feed system,（3）Flue gas system,（4）SO2 absorption systems,（5）Gypsum dehydration system,（6）Gypsum accumulating
System,（7）Slurries exhaust system,（8）Technique water system,（9）Compressed air system,（10）Waste Water Treatment,（11）Oxidation
Air system,（12）Electric control system.Wet fuel gas desulfurizing technology is the whole desulfurization using limestone slurry as washing absorption agent
Journey is divided into two stages progress, i.e., upper loop and lower loop.Limestone slurry can be introduced separately into loop up and down, and flue gas is tangentially
Loop under into absorption tower, flue gas saturation temperature is cooled to, while part SO2 absorbs generation gypsum (CaSO by lime stone4·
2H2O).The flue gas of cooling enters the spraying area in loop on absorption tower, through fully washing, reaches SO2 maximum absorbance, SO2Turn
Calcium sulfite is turned to, final absorption product is calcium sulphate crystal (gypsum) slurries after air oxidation.It is warm and humid using HMT337 types
Spend transmitter experimental study desulfurizing tower import flue gas humiture, empty tower gas velocity, liquid-gas ratio, doctor solution temperature and desulfurizing tower class
The influence system desulfuration efficiency to wet desulphurization neat stress humiture such as type, slurries p H values are mainly by slurries for slurry condition, lime
Stone dissolves and SO2 inhalation effects, and the rapid rising for causing p H values for slurry of desulphurization system, SO2, which absorbs, causes slurries p H
Slowly decline, the increase of lime stone dissolution time, which can provide the stable pH value of slurries, will all influence desulfuration efficiency, therefore present invention hair
Desulfuration efficiency is of great immediate significance a kind of bright full-automatic laminar flow screw spraying high-efficiency desulfurization technique of offer and practical warp
Ji value.
Invention number 201210271760.7, Chen Biao et al. described a kind of limestone slurry of desulfurization system pH value in 2013
Control method, the process are to disclose a kind of limestone slurry of desulfurization system pH value control methods.This method includes：
According to the SO for entering absorption tower2Mass flow obtain for slurry flow theory value；According to SO2Mass flow and pH initial values
Between functional relation determine into pH initial values corresponding to the SO2 on absorption tower mass flow, by the pH initial values and current
The lime stone slurry pH values of measure are compared to obtain for slurry flow correction value；The functional relation is to meet predetermined take off
Pass through the SO to entering absorption tower under the conditions of sulphur efficiency2Mass flow and absorption tower sodalime stone slurries actual pH between
Mapping data in advance fitting form；According to described for starching flow correction value to being modified for slurry flow theory value；According to
The revised actual stock volume for slurry flow value control lime stone slurry.Laminar flow screw spraying desulfurization method of the present invention
It is that lime stone dissolution time is extended by laminar flow using offer, so as to temperature pH value, stereoeffect is produced by screw spraying and increased
Air night contact area, so as to improve desulfuration efficiency.The equipment and technology mode of stable pH value, its control mode nor with
SO2Mass flow on the basis of, this is due in steel mill, and power plant obtains actual production, and the discharge capacity of flue gas is not stable
Numerical value, there is the characteristics of interim, thus employing mode of the present invention and the invention control embodiment and principle exist it is bright
Aobvious difference.
Invention number 201610051851.8 Yao Kun are bright et al. to describe a kind of multi-mode control method for keeping pH value stable
And device, including two pieces of conductivity meters, a measuring pump, a control cabinet, a molten medicine-chest, it is molten that the inside is equipped with NaOH
Liquid, NaOH solution is squeezed into by electric generator inner cooling water circulation system by measuring pump and woven hose, by two pieces of conductivity meters
Signal controls the startup of measuring pump by control cabinet or stops keeping the stable multi-mode of pH value to control the present invention relates to a kind of
Method and the device for realizing this method, this method include：PH value setting procedure, pH value measuring process, pH value automatically control step,
PH value concentration transfinite determination step, different PH control parameter switch step, alkaline material 1 add step, pH value feedforward control
Step, the addition of alkaline material 2 automatically control step, the addition measuring process of alkaline material 2 and perform step.The above method and
Device can either help chemical enterprise to maintain the stable setting value in technological requirement of pH value in process of production, while and can enough exists
After detecting that fluctuation occurs for the charging for influenceing pH value, and the addition of the first alkaline material can not continue to control pH value
When, the inlet amount of fast automatic another alkaline material of adjustment, so as to meet the requirement of pH value control, overcome manual operation mistake
The operating difficulties that the two in journey can not be taken into account, drastically increases control accuracy and production efficiency.The invention has certain borrow
Reflect meaning, but the stable pH value of desulfuration field changes and changed with lime stone dissolution time, be not simple addition number, because
This invention can't resolve situations of the PH with the time using change in the case of same addition, and laminar flow control of the present invention is implemented
Method, spray improves contact surface method and the invention has obvious difference.
Invention number 201410591969.0 Yang Ying jasmines et al. describe a kind of sintering flue gas desulfurization method of denitration, are included in
Desulphurization denitration processing is carried out to sintering flue gas using pyrolusite powder in SDA absorption towers.Using the oxidisability of pyrolusite powder, will sinter
Sulfide, nitrogen oxides in flue gas, so as to remove sulphur and nitre in sintering flue gas.Slurry is made in pyrolusite powder by the present invention
Liquid, and by the atomization of rotary atomizer in SDA absorption towers, can fully contact, fill with the sintering flue gas for shape motion of spinning
The sulphur and nitre divided in removing sintering flue gas.Unreacted pyrolusite powder is included in dust after dust removal process, part dust is returned
Overfall liquid pool, is recycled.Method desulfurization of the slurries using SDA rotary-atomizings is made in pyrolusite powder by the invention, and of the invention
Take the pH value of stable lime stone slurry while desulfurization is carried out using screw spraying mode, embodiment and control mode have bright
Aobvious difference.
201510276877.8 ancestor's seats of invention number et al. describe a kind of desulphurization denitration automatic control system, including：From
Autocontrol system is made up of smoke detectors, powder transfer device, bin-level detection means and upper monitoring machine, PLC controls
Cabinet communicates to connect with upper monitoring machine, and upper monitoring machine is used for the state for monitoring and showing whole automatic control system；Powder is defeated
Device is sent to input catalyst into chimney according to the feeding amount of the catalyst relation directly proportional to nitrogen sulfur content in flue gas, when urging
When agent exceedes low material position or high charge level, can alert, to remind staff to add materials；When the composition of catalyst
After being unsatisfactory for the desulphurization denitration processing to flue gas, alert, to take measures.The invention is realized to a certain extent
Automated condtrol, but control mode does not also fully achieve automation, it is necessary to manually participate in；And controlled in the present invention by stable
The pH value of slurrying liquid simultaneously automatically adjusts plasm PH value with reference to foregoing my invention 201610590043.9, is carried by screw spraying
High gas-liquid contact face, it is achieved thereby that it is full-automatic, there is obvious difference with the invention.
Although having pallet desulfurizing tower to improve gas liquid interfacial area improves desulfuration efficiency, blocking is easily produced.Currently from
Country's invention retrieval draws domestic also without the technique of full-automatic laminar flow screw spraying desulfurization, and also the limestone wet-process useless that solves takes off
Extend the pH value of lime stone dissolution time stable slurry during sulphur operation process and do not influence blocking and realize screw spraying.
The feed that conventional process system uses controls pH value automation detection and control system useless, and supply lines do not have stable
The laminar flow of lime stone solubility supplies paste system, and spray structure uses the structure in multiaspect domain, can not form efficient spiral aerosol.
The content of the invention
It is an object of the invention to provide a kind of full-automatic laminar flow screw spraying high-efficiency desulfurization system, the system includes pH value
Automatic regulating system and laminar flow are for paste system, screw spraying system three parts.Improve existing steel plant, coal fired thermal power plant it is wet
Method flue gas desulfurization is handled, while investment is low needed for the present invention, quick, improves desulfuration efficiency, has higher economic value.
The purpose of the present invention is achieved through the following technical solutions：
A kind of full-automatic laminar flow screw spraying high-efficiency desulfurization system, the system include pH value automatic regulating system and laminar flow for slurry
Material system, screw spraying system three parts；The system combination enterprise desulphurization denitration neutralizer pH value auto-adjustment control, implement complete
Automatic desulphurization control；Laminar flow includes upper box, lower box for slurry case, and 10-100 laminar flow pipes, upper and lower box house is distributed with inside
2-12 closed chamber is distributed with, overturns slurries up and down 3-10 times；Screw spraying system is made up of 2-5 helical layer spraying layers, every layer
Spiral spacing is 100-500mm, and spiral angle is 30-60 °, individual layer spray head quantity 40-200；System passes through storehouse of stocking up
Level sensor feedback provides signal, provides the lime of identical flow by the setting value of feedback by lime stone Weighing feeder
Stone, ground to ball mill according to continuous a few hours, qualified granularity is supplied to stock storehouse by oscillating feeder, ensures
Stock has storing in storehouse, and material by helix tube by being delivered in raw material pond in storehouse of stocking up；PH detects the PH for including raw material
Value, the pH of slurries, the pH value of tailing, Water Pump Circulation System；Wherein PH probes include discussion sensor and controller, pH value instrument
Table every 15min tests pH value once, by connection to control table by control table according to pH value numeric feedback given by its test value
PLC；The several water pump circulation conveying slurries of Water Pump Circulation System value to absorption tower carries out desulfuration operations, reduces sulfur content.
A kind of described full-automatic laminar flow screw spraying high-efficiency desulfurization system, the limestone slurry liquid preparing system provide conjunction
The lime stone absorbent slurry of lattice is the basic of desulfurization, it is necessary to for the pH of slurries, density, liquid level, lime stone slurry
Mass fraction rationally controls, and protects feeding system and stirring system.
A kind of described full-automatic laminar flow screw spraying high-efficiency desulfurization system, the level sensor feedback in the stock storehouse carry
For signal, the lime stone of identical flow is provided by the setting value of feedback by lime stone Weighing feeder, to ball mill according to
Continuous a few hours grinding, qualified granularity are supplied to stock storehouse by oscillating feeder.
A kind of described full-automatic laminar flow screw spraying high-efficiency desulfurization system, the agitating device by support body, stirring motor,
Impeller is formed, and U-steel frame is mounted on above the small pond of raw material.
A kind of described full-automatic laminar flow screw spraying high-efficiency desulfurization system, the laminar flow is for slurry tank inlet slurry under
Road, outlet slurry form loop in Shang Lu, a liquid stream by 8 enclosed cavity types and ordered series of numbers laminar flow, and centre is reciprocal up and down
Sedimentation more than 6 times, realizes the control and extension of lime stone dissolution time.
A kind of described full-automatic laminar flow screw spraying high-efficiency desulfurization system, the laminar flow lime stone solution are examined by pH value
Survey instrument detection in every 30 minutes and once import and export pH value.
A kind of described full-automatic laminar flow screw spraying high-efficiency desulfurization system, the screw spraying system is 3 layers of spray column,
Single spraying layer has spray head 108, is alternately distributed along directions of rays.
A kind of described full-automatic laminar flow screw spraying high-efficiency desulfurization system, the individual layer spacing is 2150mm, and pitch is
300mm, spiral angle are 45 °, and upper and lower spraying layer has 1000mm or so common factors, realizes multi-angle solid spray mode.
A kind of described full-automatic laminar flow screw spraying high-efficiency desulfurization system, the exhaust gas volumn inlet concentration is 3000
mg·Nm-3, air demand 15m3It is that 3 laminar flows supply to starch pH value to be respectively 5.4 from down to up for slurry case to screw spraying tower during/h,
When 5.2,5.0, sprinkle density is 12 m3·m-2·h-1。
Advantages of the present invention is with effect：
1st, the pH value for realizing desulfurization slurry is stable.
2nd, the pH of the slurries involved by sulfur removal technology, density, liquid level are realized, the mass fraction of lime stone slurry closes
Reason control, improves desulfuration efficiency, has saved maintenance cost.
3rd, realize increase desulfurization face domain and solve blockage problem, improve desulfuration efficiency.
Brief description of the drawings
Accompanying drawing 1 is sulfur removal technology structural representation general at present；
Accompanying drawing 2 is full-automatic laminar flow screw spraying high-efficiency desulfurization process system configuration diagram of the invention；
Accompanying drawing 3 is primary bright enterprise's desulphurization denitration neutralizer pH value controlled system with self-regulation configuration diagram；
Accompanying drawing 4 is primary bright enterprise's desulphurization denitration neutralizer pH value process chart；
Accompanying drawing 5 is laminar flow for slurry box structure front view；
Accompanying drawing 6 is laminar flow for slurry box structure top view；
Accompanying drawing 7 is laminar flow for slurry box structure side view；
Accompanying drawing 8 is screw spraying structural front view；
Accompanying drawing 9 is screw spraying structure top view.
Embodiment
Shown accompanying drawing illustrated embodiment below in conjunction with the accompanying drawings, the invention will be further described.
To elaborate embodiments of the present invention, the present invention has taken wherein typical instantiation procedure to implement as the present invention
Scheme is specific as follows according to reference：
PH value automatic regulating system of the present invention（My invention 201610590043.9）Comprising as follows：PH value monitoring is set by PLC
Put the composition of PID Numerical Control slurries；Automatic mixing feeding, weigh to be fed by level-sensing device control lime stone and ground with ball mill
Mill so that the material of feed bin remains at certain position, so provides guarantee for follow-up stable material-supplying；Pass through liquid level
The water inlet of meter control liquid-way system is so as to which to material storage container, for water, feed rear stirrer continuously starts stocks up to material storage container, passes through PH
The supply of value control slurry, so as to realize automation stirring feed；PLC control system, each equipment shape of its subordinate of real-time display
State information, usage time, PH records of values, realize intelligent institutional operation.
Laminar flow includes as follows for paste system：Using layer flow mode so that slurry reciprocal circulation repeatedly in way is flowed through, from
And it is very big extend lime stone dissolution time, stabilize plasm PH value.Embodiments thereof is to use laminar flow control mode so that
Slurries finally flow out back and forth in laminar flow case up and down by the reverse flowing of pipeline and hole.Extension supplies also to keep away while the slurries time
Precipitation is exempted from.Multiple laminar flow feed tanks also achieve the different PH control of multi-layer helical spray pipeline.
Screw spraying system includes as follows：Sprayed using helical structure mode, instead of the face in current desulfurizing tower
Domain sprays mode, significantly increases spray efficiency while has also evaded the blockage problem using pallet desulfurizing tower.So that flue gas
Fully contact.
Full-automatic laminar flow screw spraying high-efficiency desulfurization process system of the invention prepares slurry, laminar flow using automatic pH value regulation
Stable slurry pH value, screw spraying increase desulfuration efficiency, solves lime stone dissolving and pH value stable problem, solves desulfurization effect
The problem of rate can not get both with blockage problem, changes current desulfurization technology, can greatly reduce discharge beyond standards accident.
The embodiment that embodiment 1 to 6 illustrates full-automatic laminar flow screw spraying high-efficiency desulfurization process system framework respectively
It is as follows successively：
Embodiment 1：Example 1 is WFDG sulfur removal technology structural representations general at present, and left side is at power plant exhaust as shown in Figure 1
Schematic diagram is managed, middle part is Structure of Flue Gas Desulfuration Absorbing schematic diagram, and right side is desulfurized limestone slurries subsequent treatment schematic diagram, using the present invention
Structure can greatly reduce right side red circle follow-up work treating capacity.The automatic laminar flow screw spraying high-efficiency desulfurization technique system of the present invention
System effect is that solve the 2 small red circle structure in middle part inside the process chart.The present invention is used for solving traditional handicraft structure three
Big shortcoming, the feed of use control pH value automation detection and control system useless, the unstable lime stone solubility of supply lines
Laminar flow supply paste system, spray structure uses the structure in multiaspect domain, can not form efficient spiral aerosol.
Embodiment 2：Example 2 is full-automatic laminar flow screw spraying high-efficiency desulfurization process system framework at present, as shown in Figure 2 certainly
Prepared by dynamic control and raw material is automatically adjusted using my the former enterprise's desulphurization denitration neutralizer pH value of the patent No. 201610590043.9
Control system,（Left side prepares for slurry in accompanying drawing 1）Further increase laminar flow Stability Analysis of Structures lime on the basis of the preparation of this slurry
Stone solubility and screw spraying structure form spiral aerosol structure, improve desulfuration efficiency.
Embodiment 3：Example 3 is primary bright enterprise's desulphurization denitration neutralizer pH value controlled system with self-regulation, such as Fig. 3 institutes
Show that this includes pH value monitoring system and automatic mixing feeding system, PLC control system three parts.Framework is prepared for slurries feed to show
It is intended to as shown in figure 4, signal is provided by the level sensor feedback in storehouse of stocking up first, by lime stone Weighing feeder by anti-
The setting value of feedback provides the lime stone of identical flow, is ground to ball mill according to continuous a few hours, qualified granularity is led to
Cross oscillating feeder and be supplied to stock storehouse, so as to ensure in stock storehouse there is certain storing forever, material passes through in storehouse of stocking up
It is delivered to by helix tube in raw material pond.Limestone slurry liquid preparing system provides qualified lime stone absorbent slurry in this example
Liquid, be the basic of desulfurization, it is necessary to for the pH of slurries, density, liquid level, the mass fraction of lime stone slurry rationally controls, protect
Protect feeding system and stirring system.There is provided signal by the level sensor in storehouse of stocking up feedback first, by lime stone weigh to
Material machine is provided the lime stone of identical flow by the setting value of feedback, is ground to ball mill according to continuous a few hours, qualified
Granularity stock storehouse is supplied to by oscillating feeder, so as to ensure in stock storehouse there is certain storing forever, in storehouse of stocking up
Material is delivered in raw material pond, as shown in Figure 6 by the hopper in figure for 700X600 by spiral bore 76.In this example
Agitating device is stirred to be made up of support body, stirring motor, impeller as shown in Figure 7.1mX1m alkaline pan feeding pond needs in digital-to-analogue
The impeller of 300mm diameters and 0.75kw motor, mounting groove steelframe are mounted on above the small pond of raw material, when receiving electricity
When control needs to increase the signal of Ph values, feed device stops after starting feeding certain time, and the maximum supply of this example feed device is
100kg/h.PH detections include the pH value of raw material, the pH of slurries, the pH value of tailing, Water Pump Circulation System.Wherein PH probes include
Sensor and controller are inquired into, the pH value sensor probe used such as certain power plant is the 6028 of Hash, then its corresponding controller
For SCD200, pH value instrument every 15min tests pH value once, its test value by connection to control table, by control table according to
According to pH value numeric feedback to PLC.The several water pump circulation conveying slurries of Water Pump Circulation System value to absorption tower carries out desulfuration operations, drop
Low sulfur content.
Embodiment 4：Example 4 is laminar flow for slurry case example：As shown in Fig. 5,6,7, it is divided into upper box 1, lower box 3, entrance
Slurry in lower way outlet slurry in Shang Lu, so as to evade lime stone precipitation.Its internal liquid process is as shown in Figure 7 wherein
One liquid flow path direction, the liquid stream form loop by 8 enclosed cavity types and ordered series of numbers laminar flow 2.Middle reciprocal sedimentation 6 times up and down
More than, it is achieved thereby that the control and extension of lime stone dissolution time, and solve lime stone sedimentation problem.In this example, lead to
Cross laminar flow and realize the pH value of lime stone solution and uniformly mix precipitation-free attachment, pass through the 6028PH value detectors of Hash
PH value is once imported and exported in detection in every 30 minutes, it is found that PH fluctuations are only 0.1 or so, subsequent treatment gypsum dehydration amount is also fallen on a year-on-year basis
5% or so.
Embodiment 5：Example 5 is screw spraying system：As shown in Figure 8,9, it is 3 layers of spray column in example, it is single in example
Spraying layer has spray head 108, is alternately distributed along Fig. 9 directions of rays.Individual layer spacing is 2150mm, pitch 300mm, is supplied water
Pipeline is DN200, and spiral angle is 45 °, and spray head, which employs three-dimensional spray mode, realizes intersection uniformly, will be formed with air-flow
Spiral aerosol.Spraying layer has 1000mm or so common factors up and down simultaneously, has evaded Airflow obstruction and has added acting surface domain again, will be conventional
Spray structure realize multi-angle solid spray mode.
Embodiment 6：To illustrate the process efficient desulfurized effect, example 6 is 3000 mgNm in exhaust gas volumn inlet concentration-3,
Air demand 15m3It is respectively 5.4 from down to up for slurry pH value to screw spraying tower in example to being 3 laminar flows for slurry case during/h,
When 5.2,5.0, sprinkle density is 12 m3·m-2·h-1.Slurry box residence time 15min, spray employ the helical layer of example 5 three
Spray structure, final desulfuration efficiency reach 97.48%, are higher by normal tray tower desulfuration efficiency 1% or so, while block without flue gas
Phenomenon.
Above embodiment only for illustrating the implementation process of the present invention, the claim of the patent using claims as
It is main.
Claims (9)
1. a kind of full-automatic laminar flow screw spraying high-efficiency desulfurization system, it is characterised in that the system automatically adjusts including pH value
System and laminar flow are for paste system, screw spraying system three parts；The system combination enterprise desulphurization denitration neutralizer pH value is automatic
Adjustment control, implement full-automatic desulphurization control；Laminar flow includes upper box for slurry case（1）, lower box（3）, 10- is distributed with inside
100 laminar flow pipes（2）, upper and lower box house is distributed with 2-12 closed chamber, overturns slurries up and down 3-10 times；Screw spraying system by
2-5 helical layers spraying layer is formed, and is 100-500mm per helical layer spacing, and spiral angle is 30-60 °, individual layer spray head quantity
40-200；System provides signal by the level sensor feedback in storehouse of stocking up, by lime stone Weighing feeder by feedback
Setting value provides the lime stone of identical flow, is ground to ball mill according to continuous a few hours, qualified granularity is by shaking
Dynamic batcher is supplied to stock storehouse, has ensured there is storing in stock storehouse, and material by helix tube by being delivered to original in storehouse of stocking up
Expect in pond；PH detections include the pH value of raw material, the pH of slurries, the pH value of tailing, Water Pump Circulation System；Wherein PH probe bags
Containing sensor and controller is inquired into, every 15min tests pH value once, its test value is by connection to control for pH value instrument
Table, by control table according to pH value numeric feedback to PLC；The several water pump circulation conveying slurries of Water Pump Circulation System value to absorption tower is entered
Row desulfuration operations, reduce sulfur content.
A kind of 2. full-automatic laminar flow screw spraying high-efficiency desulfurization system according to claim 1, it is characterised in that the stone
Lime stone serum producing system provides qualified lime stone absorbent slurry, is the basic of desulfurization, it is necessary to pH for slurries, close
Degree, liquid level, the mass fraction of lime stone slurry rationally control, and protect feeding system and stirring system.
3. a kind of full-automatic laminar flow screw spraying high-efficiency desulfurization system according to claim 1, it is characterised in that described standby
The level sensor feedback of feed bin provides signal, and identical flow is provided by the setting value of feedback by lime stone Weighing feeder
Lime stone, ground to ball mill according to continuous a few hours, qualified granularity by oscillating feeder be supplied to stock storehouse.
4. a kind of full-automatic laminar flow screw spraying high-efficiency desulfurization system according to claim 1, it is characterised in that described to stir
Mix device to be made up of support body, stirring motor, impeller, U-steel frame is mounted on above the small pond of raw material.
A kind of 5. full-automatic laminar flow screw spraying high-efficiency desulfurization system according to claim 1, it is characterised in that the layer
Stream passes through 8 enclosed cavity types and ordered series of numbers laminar flow in Xia Lu, outlet slurry for slurry tank inlet slurry in Shang Lu, a liquid stream
（2）Loop is formed, middle reciprocal sedimentation more than 6 times up and down, realizes the control and extension of lime stone dissolution time.
A kind of 6. full-automatic laminar flow screw spraying high-efficiency desulfurization system according to claim 1, it is characterised in that the layer
Flowstone lime stone solution once imports and exports pH value by PH value detector detection in every 30 minutes.
A kind of 7. full-automatic laminar flow screw spraying high-efficiency desulfurization system according to claim 1, it is characterised in that the spiral shell
Rotation spray system is 3 layers of spray column, and single spraying layer has spray head 108, is alternately distributed along directions of rays.
A kind of 8. full-automatic laminar flow screw spraying high-efficiency desulfurization system according to claim 7, it is characterised in that the spray
Leaching tower individual layer spacing is 2150mm, and pitch 300mm, spiral angle is 45 °, and upper and lower spraying layer has 1000mm or so common factors, real
Existing multi-angle solid spray mode.
A kind of 9. full-automatic laminar flow screw spraying high-efficiency desulfurization system according to claim 1, it is characterised in that the cigarette
Tolerance inlet concentration is 3000 mgNm-3, air demand 15m3It is that 3 laminar flows supply screw spraying tower slurry pH value for slurry case during/h
When being respectively 5.4,5.2,5.0 from down to up, sprinkle density is 12 m3·m-2·h-1。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110237690A (en) * | 2019-06-04 | 2019-09-17 | 华电电力科学研究院有限公司 | A kind of coal-burning power plant's flue gas desulphurization unit and its working method |
| CN110585866A (en) * | 2019-10-10 | 2019-12-20 | 江门市同力环保科技有限公司 | Desulfurization and dust removal method for copper-containing industrial sludge smelting flue gas |
-
2017
- 2017-10-10 CN CN201710934438.0A patent/CN107617316A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110237690A (en) * | 2019-06-04 | 2019-09-17 | 华电电力科学研究院有限公司 | A kind of coal-burning power plant's flue gas desulphurization unit and its working method |
| CN110585866A (en) * | 2019-10-10 | 2019-12-20 | 江门市同力环保科技有限公司 | Desulfurization and dust removal method for copper-containing industrial sludge smelting flue gas |
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