CN109292866A - A kind of desulfurizing waste water processing device and processing method - Google Patents
A kind of desulfurizing waste water processing device and processing method Download PDFInfo
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- CN109292866A CN109292866A CN201811417618.2A CN201811417618A CN109292866A CN 109292866 A CN109292866 A CN 109292866A CN 201811417618 A CN201811417618 A CN 201811417618A CN 109292866 A CN109292866 A CN 109292866A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 86
- 230000003009 desulfurizing effect Effects 0.000 title claims abstract description 32
- 238000012545 processing Methods 0.000 title claims abstract description 26
- 238000003672 processing method Methods 0.000 title description 3
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 47
- 230000023556 desulfurization Effects 0.000 claims abstract description 47
- 230000001105 regulatory effect Effects 0.000 claims abstract description 41
- 230000001276 controlling effect Effects 0.000 claims abstract description 10
- 239000007921 spray Substances 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 11
- 238000004065 wastewater treatment Methods 0.000 claims description 11
- 235000019504 cigarettes Nutrition 0.000 claims description 5
- 238000000889 atomisation Methods 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 abstract description 28
- 230000008020 evaporation Effects 0.000 abstract description 23
- 239000002245 particle Substances 0.000 abstract description 20
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 16
- 239000007789 gas Substances 0.000 description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 12
- 239000003546 flue gas Substances 0.000 description 12
- 239000007788 liquid Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000010881 fly ash Substances 0.000 description 7
- 239000000779 smoke Substances 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- 239000000428 dust Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
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- 150000003839 salts Chemical class 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
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- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 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
- 238000009388 chemical precipitation Methods 0.000 description 1
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- 238000005520 cutting process Methods 0.000 description 1
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- 230000009977 dual effect Effects 0.000 description 1
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- 239000004744 fabric Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- 230000011218 segmentation Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
- C02F1/12—Spray evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/38—Gas flow rate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/40—Liquid flow rate
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of desulfurizing waste water processing devices, including control system, air balance tank, desulfurization wastewater compensator and atomizing lance, the air balance tank, desulfurization wastewater compensator pass through bypass line respectively and are connected with atomizing lance, the omnipotent regulating valve of high regulating ratio is equipped in the bypass line, the control system carries out automatically controlling the omnipotent regulating valve in bypass line, the omnipotent valve on admission line, the omnipotent valve of threeway, frequency converter and waste water pump in input duct.Compared with prior art, the present invention realizes the high-precision control of air intake duct and input duct flow, the partial size of its atomizing particle is set to reach the micron-sized adjusting control of partial size by the adjusting of high regulating ratio, it can prevent excessive droplet from making waste water evaporation is not dry to cause to be bonded in chamber wall and prevent too small particle from cannot be recycled by deduster.There is no any waste discharge, becomes desulfurization wastewater zero-emission truly.
Description
Technical field
The present invention relates to a kind of sewage treatment field more particularly to a kind of desulfurizing waste water processing device and processing methods.
Background technique
After flue gas desulfurization facilities are built, the desulfurization wastewater of discharge is because being enriched flue gas, lime stone, the salinity in process water
And salt content in water is caused to generally reach 25000-45000mg/L, even as high as 60000mg/L.Variation water quality is big, and water is unstable
It is fixed.Although balancing the effluent part by reuse in the water balance design drawing of designing institute to realizing wastewater zero discharge,
The 1/5-1/4 or even 1/3 of desulfurization wastewater Liang Zhan thermal power plant effluent sewage discharge amount, has blended saliferous in the recycle-water of desulfurization wastewater
Amount has reached 5000-15000mg/L, and serious corrosion, therefore this blending in actual production process can be caused to system equipment
Reuse mode is infeasible.
Desulfurization wastewater processing technique mainly has at present: settling tank method, chemical precipitation method, biological treatment, mixes Zero-valent Iron
Technology law, with flying dust mixing method, evaporation tank method, flue evaporation, artificial swamp method, steam concentration and evaporation method etc..It wherein can be true
It is positive realize zero-emission almost without treatment effeciency is low, can also be with secondary pollution.
Desulfurization wastewater: being atomized by wherein flue evaporation using double fluid atomization nozzle and spray into air preheater and deduster it
Between flue in, using fume afterheat by waste water evaporating completely, the pollutant in waste water is made to be converted into crystal or salt, with fly
Ash is trapped by subsequent deduster together.
Flue spray evaporation process section
When carrying out the design of this process section, it is first determined following and several important parameters:
1. the selection of flue internal spraying position:
It is needed in practical projects to the progress CFD simulation of flue flow field, simulated experiment and studies have shown that in straight short flue
Interior, flow field is more steady, and drop still has a large amount of waste water drop not to be evaporated after entering deduster, and is bent long flue due to cigarette
Road is longer, and residence time of the drop in flue is longer, and drop has been vaporized completely before entering deduster, therefore nozzle cloth
Seated position will select on being bent long flue.
2. the selection of smoke evaporative temperature
There is researcher's discovery to evaporate waste water, droplet cluster evaporates in the unit time in 453K by flue-gas temperature control
Quality is maximum, alternative temperature range section 413K-473K.
The smoke box that researcher has studied when entrance flue gas temperature is respectively 110,115,120,125,130 and 135 DEG C is residual
Liquid stay amount, discovery is when smoke inlet temperature is 127.4 DEG C, the quality of the non-evaporating completely drop of deduster air inlet smoke box entrance
Score about 0.2%, the mass fraction that deduster air inlet smoke box exports non-evaporating completely drop is 0.
3. the influence of atomizing particle partial size
The particle diameter of nozzle atomization has very important influence to the evaporation of drop.Atomizing particle size is bigger, and residual is not
The drop of evaporating completely is more, also more with the drop of flue collision with wall, this is because liquid-drop diameter is smaller, the ratio table of drop
Area is bigger, and the evaporation time used is fewer, and the rate of evaporation is also faster, and partial drop has steamed in face of arrival walling of flue
Hair.
The all good solution of preceding two o'clock, the control of the 3rd atomizing particle partial size, although atomizing particle partial size can be by increasing air inlet
Ratio, it is possible in theory to realize the purpose for reducing granularity, but never solve in real process.
And by us the study found that grain diameter is easy greatly very much to condense in flue tube wall, when itself and flyash phase
The cement of high grade has been reformed into after mixing, once be bonded in walling of flue will cause cleaning it is cumbersome.Grain diameter is too small, after
Phase deduster can not capture collection completely, cannot achieve zero-emission.
Existing power plant mostly uses greatly chemical mode to carry out desulfurization wastewater processing, not only at high cost but also can not accomplish zero-emission
It puts, still there is a large amount of pollutant to enter underground water and rivers and lakes He Hai.Major Utilities Electric Co. all has seen that the excellent of spray evaporation scheme
Gesture is tested one after another.But the scheme used has direct with solenoid valve, and the common regulating valve of some is all unable to accurately control
The partial size of droplet causes the generation of flue blockage accident.Even there is large-scale power company to forbid grinding for this technology of spray evaporation
Study carefully.Also large-scale power company requests Chinese Ministry of Environmental Protection loosens the emission request of desulfurization wastewater.The difficult point of all technologies all concentrate on as
What controls the partial size of droplet.
Applicant is in a kind of omnipotent regulating valve invention of CN201820248426.2, a kind of omnipotent tune of CN201810140069.2
Valve is saved, sealing performance is improved with pressure difference self-sealing, valve seat automatic centering, increases cutting pressure difference, to increase variable damping range, with
Regulation performance is improved, increases regulating ratio with V-type mouth is opened, corrects characteristic curve with dual sealing technique.It mentions to solve this problem
Solid foundation is supplied.
Summary of the invention
It solves the above problems the object of the invention is that providing one kind, desulfurizing waste water processing device is evaporated to realization flue
And processing system.
To achieve the goals above, the technical solution adopted by the present invention is that: a kind of desulfurizing waste water processing device, including control
System, air balance tank, desulfurization wastewater compensator and atomizing lance, the atomizing lance use two-phase atomizing lance, the sky
Gas compensator is connected by the air inlet of a bypass line and atomizing lance, and waste water compensator passes through a bypass line and mist
The inlet for changing spray gun is connected, inside the atomizing lance insertion flue or evaporator,
The air balance tank is that the influence for fluctuating the air mass flow of each branch to other branches is reduced,
The fluid balance tank is that the influence for fluctuating the wastewater flow of each branch to other branches is reduced,
The omnipotent regulating valve of high regulating ratio is equipped in the bypass line, the omnipotent regulating valve of high regulating ratio is for adjusting
The maximum stream flow that gas liquid ratio and evaporation capacity allow, to realize that high-precision adjusting gas liquid ratio achievees the purpose that control atomizing particle size,
The control system is in the omnipotent regulating valve in bypass line, the omnipotent valve on admission line, input duct
The omnipotent valve of threeway, frequency converter and waste water pump carry out automatically controlling.The automatic control system is to be with the omnipotent valve of high regulating ratio
Core is set up and the core of this system.By design, make the dry formed after the spray evaporation of the generation of atomizing lance
Mass-energy is absorbed by deduster, and the steam formed after spray evaporation can be desulfurized tower absorption, and will not crystallize in flue.
By experiment, present apparatus generation aerosolized particles particle size high-precision in 1-100 micron range is adjustable, wherein
Atomizing particle size controlling effect at 40 microns is best.
Preferably, the control system is mainly by the electromagnetism of PLC logic controller, detection wastewater flow for control
Flowmeter, the vortex-shedding meter for detecting air mass flow, the pressure transmitter for detecting pressure or other electronic control units composition, institute
PLC logic controller is stated to the omnipotent regulating valve in bypass line, the omnipotent valve on admission line, the threeway ten thousand in input duct
Energy threshold, frequency converter and waste water pump, which carry out automatically controlling, carries out electric signal control.
The control system sets wastewater flow according to the exhaust gas temperature of auxiliary flue (or flue, evaporator) and flow
And gas liquid ratio, achieve the purpose that maximum throughput and minimum air consumption.
The control system controls the gas liquid ratio of each spray gun according to the characteristic curve of each spray gun, to control droplet
Partial size.
The control system reaches stable waste water compensator with the frequency and the regurgitant volume of waste water compensator that control frequency converter
Pressure.
Control system reaches the pressure of control air balance tank by controlling the air inflow of air balance tank.
The control system carries out remote monitoring to whole system by network, to reach the automatic mesh diagnosed and optimize
's.
The air balance tank is equipped with admission line, and the pipeline that carries out is equipped with air pump and carries out flow control
Omnipotent valve, the omnipotent valve for carrying out flow control play the purpose of stable equilibrium's pressure tank.
The desulfurization wastewater compensator is equipped with input duct, and the input duct is equipped with the waste water pump by transducer drive
With the omnipotent valve of threeway of the big regulating ratio with reflux capability, waste water it is compressible smaller, pass through the threeway ten thousand of big regulating ratio
The pressure of accurate control waste water compensator just can be achieved in the driving of energy threshold and frequency converter.Wherein, waste water pump selects lift relatively steady
Fixed waste water pump,
Preferably, the pipeline of precise control of flew in need be equipped with regulating valve, controlled convenient for precision.
Preferably, the atomizer there are several, atomizer array is formed, each atomizer passes through independence
Bypass line be connected to respectively with air balance tank, desulfurization wastewater compensator, the omnipotent adjusting of the high regulating ratio in bypass line
Valve forms omnipotent valve array.Enable the present apparatus to parallel unit or more units while being controlled and being switched, it is more convenient for coping with
The case where unit is run.It forms array arrangement and is convenient for centralized control and management, preferably, the atomizing lance is spray with four
One group of rifle, four spray guns are set to same on flue, experiment finds one group of spray gun of a flue.
System connection type 1: a kind of desulfurization wastewater treatment system, flue, desulfurizing tower including power plants generating electricity unit and
Desulfurizing waste water processing device, the flue are equipped with economizer, air preheater and deduster, and the atomizing lance is inserted directly into
Inside the flue of the air preheater rear end of power plants generating electricity unit.
System connection type 2: a kind of desulfurization wastewater treatment system, flue, desulfurizing tower including power plants generating electricity unit and
Desulfurizing waste water processing device, the flue are equipped with economizer, air preheater and deduster, and the flue is equipped with auxiliary cigarette
Road, the auxiliary flue finally merge before deduster with flue collector, in the atomizing lance insertion auxiliary flue.
System connection type 3: a kind of desulfurization wastewater treatment system, flue, desulfurizing tower including power plants generating electricity unit and
Desulfurizing waste water processing device, the flue are equipped with economizer, air preheater and deduster, further include carrying out dry matter separation
Evaporator, the atomizing lance is inserted at the top of the evaporator, and the evaporator upper end introduces the tail gas of air preheater front end,
Lower end merges before deduster with flue collector.Dry matter convenient for being formed after evaporation is absorbed by deduster.
Preferably, being expansion segment at the top of the evaporator, and expansion angle is greater than the spray angle of atomizing lance, avoids
Spraying and evaporator contact atomizing particle is attached to evaporator inner wall, and the base of evaporator is contraction section, increases outlet pressure.
Preferably, the evaporator upper end is connected to by air entraining pipe with the flue of air preheater front end, under evaporator
End is connected to by escape pipe with the flue of deduster front end, is equipped with regulating valve on the air entraining pipe and escape pipe.It is steamed with adjusting
Send out the heating amount of device.And evaporator can be disengaged as long as closing regulating valve when needing to repair evaporator, convenient for tearing open
It unloads and repairs.
Compared with existing flue evaporation technique, the present invention has the advantages that realizing air intake duct and input duct stream
The high-precision control of amount.It is controlled with the high-precision ratio that this carries out liquid inlet volume and air inflow, passes through the partial size of its atomizing particle
High regulating ratio adjusting reaches the micron-sized adjusting control of partial size, solves the technical bottleneck of existing desulfurization wastewater evaporation, Ji Nengfang
Only excessive droplet makes waste water evaporation is not dry to cause to be bonded in chamber wall, and can prevent too small particle from cannot be returned by deduster
It receives.It can steam quilt with the raw material of making cement factory, after evaporation after the solid salt that is formed and flyash are sufficiently mixed after waste water evaporation
Desulfurizing tower recycling.This method does not have any waste discharge, becomes desulfurization wastewater zero-emission truly.
Detailed description of the invention
Fig. 1 is structure of the invention schematic diagram；
Fig. 2 is the system principle diagram of embodiment of the present invention 1；
Fig. 3 is the system principle diagram of embodiment of the present invention 2；
Fig. 4 is the structural schematic diagram of evaporator of the present invention.
In figure: 1, atomizing lance；2, evaporator；3, air entraining pipe；4, escape pipe；5, solenoid valve.
Specific embodiment
The invention will be further described below.
The present invention is based on CN201820248426.2, CN201810140069.2's, the spool of the omnipotent regulating valve is hat
Shape core is provided with medium channel on core spherical surface, and the profile molded line of the medium channel is V-characteristic, the V in small guide vane work
The area that shape curve and valve seat surround is passage section, and circulation area increases, stream when reaching maximum opening with the increase of aperture
Logical area is equal to valve seat area.The V-type mouth of V-characteristic formation is offered on the spherical crown surface of core two sides, when valve core rotation,
Flow changes with the continuous variation of V-type mouth, realizes that high regulating ratio is adjusted, while also guaranteeing traffic characteristic well, valve
Valve seat.
Since desulfurization wastewater is saturation industrial brine, it is easy to crystallize.Once crystallization, can not just be adjusted.The tune of omnipotent valve
Section process is a kind of rotary course, and spool and valve seat can generate shearing effect.Once crystallization, will cut Nacl by scraping
It scales off, realizes self-cleaning.
A kind of desulfurizing waste water processing device, referring to Fig. 1, including control system, air balance tank, desulfurization wastewater compensator and
Atomizing lance, the air balance tank, desulfurization wastewater compensator pass through bypass line respectively and are connected with atomizing lance, the branch
The omnipotent regulating valve of high regulating ratio is equipped on the pipeline of road, the control system is to the omnipotent regulating valve in bypass line, air inlet
The omnipotent valve of threeway, frequency converter and the waste water pump on omnipotent valve, input duct on pipeline carries out automatically controlling.
The air balance tank is equipped with admission line, and the pipeline that carries out is equipped with air pump and carries out flow control
Omnipotent valve.The desulfurization wastewater compensator is equipped with input duct, and the input duct is equipped with the waste water pump by transducer drive
With the omnipotent valve of threeway of the big regulating ratio with reflux capability.
The present invention utilizes the high regulating ratio of the omnipotent regulating valve, realizes air inlet amount and desulfurization wastewater liquid inlet volume flow
High-precision control.Make the partial size of its atomizing particle reach its micron-sized adjusting by its high regulating ratio to control, solve existing
The technical bottleneck for thering is flue to evaporate.
By carrying out experiment discovery to the present apparatus, high-precision can in 1-100 micron range for aerosolized particles particle size
It adjusts, the end value at the both ends of specific aerosolized particles partial size can be adjusted specifically according to flue situation, deduster product type,
Wherein atomizing particle partial size is best with 40 microns, enters flue at this time and is dried soon, will not both be attached to tube wall, also easily
It is recycled by deduster.
The input duct is equipped with force (forcing) pump, and since the compressible amount of waste liquid is small, pump discharge pressure is excessive, certainly will will cause
Waste liquid conveying capacity is unstable, and the waste drains pump must select the preferable waste water pump of pressure stability, it is ensured that the pressure of its waste liquid is steady
It is fixed, when being later period gas-liquid mixed, realize the guarantee of high-precision regulation.
The atomizing lance 4 with four be one group of spray gun, four spray guns are set on same root flue, can carry out simultaneously into
It is atomized, the processing unit of a set of desulfurization wastewater can be set on every flue of Power Plant, by 60W unit, 4 flues, 16 sprays
Rifle about handles 10 tons of desulfurization wastewater per hour.30W unit can handle 5 tons per hour.
After present invention progress power plant runs on the spot, effect analysis:
1. fluctuating produce load without influence, on-line checking air preheater exiting flue gas amount and flue-gas temperature, according to testing number
Suitable nozzle flow is calculated according to automatic, then is adjusted by automatic instrument(s), realizes and automatically controls, guarantee spray amount and flue gas
The matching of amount, it is ensured that the stabilization of production.
2. can be reduced FGD entrance reduces smoke temperature and institute's water requirement using the temperature drop of desulfurization wastewater evaporation, reduce water purification use
Amount.
3. on flue substantially without influence, because the amplitude that desulfurization wastewater evaporation causes smoke temperature to reduce is smaller.With 600MW unit
For FGD, when handling wastewater flow rate is 3.27t/h, the average temperature drop of flue gas is 4.6 in flue, and humidity increases to 6.2%；If place
Reason amount increases to 5.0t/h, then it is 6.4 that temperature drop, which increases, humidity 6.4%, on flue system substantially without influence.
4. will not influence electric precipitator operation, desulfurization wastewater evaporation and solid residue will not influence electric precipitator operation,
It is beneficial to the raising of efficiency of dust collection instead.Power plant generallys use low-sulfur coal, and the increase of fly ash resistivity reduces electric precipitator
Efficiency of dust collection, and the salt and waste water in waste water act on the humidification of flue gas, reduction flue-gas temperature, can suitably reduce flying dust ratio
Resistance is conducive to the efficiency of dust collection for improving electric precipitator, and control flue gas equilibrium temperature is not less than the acid dew point under corresponding operating condition, no
It will cause acid moisture condensation to happen.
5. total utilization of PCA is not influenced, according to testing result, the sulfur trioxide of the flyash after spraying into desulfurization wastewater
Content 1.01~1.02% or so is lower than 3.0% controlling value of standard requirements <.Flyash is for finally producing in different concrete
Product chloride ion content requires 0.06% limits value of < 0.0063~0.0221% or so, lower than highest standard.Flyash is used for
It is 20%~25% by GB/T 175-2007 " common portland cement " proportion design in cement, the chloride ion content in cement
Finally 0.048~0.058%；Calcium oxide, the final of magnesia in cement or concrete are contained after spraying into desulfurization wastewater
Amount, is below 4.0% controlling value of < of standard requirements, will not impact.
Embodiment 1: be directed to the higher unit of flue temperature, referring to fig. 2, in figure FGD be desulfurizing tower, AH be economizer,
ESP is deduster.
A kind of desulfurization wastewater treatment system, flue, desulfurizing tower and desulfurization wastewater processing dress including power plants generating electricity unit
It sets, the flue is equipped with economizer and deduster, is equipped with dewatering system, the desulfurizing waste water processing device in the desulfurizing tower
Input duct and the dewatering system of desulfurizing tower connect, connect inside the atomizing lance and flue of the desulfurizing waste water processing device
Logical, the link position of the atomizing lance and flue is located at economizer rear end, and far from deduster.
Advantage: 1. low energy consumption, takes full advantage of the later flue residue heat of air preheater；
2. reducing exhaust gas temperature；
3. cost is relatively low, without setting equipment.
Disadvantage: 1. pairs of exhaust gas temperatures require, and too low exhaust gas temperature will cause moisture condensation；
2. vapo(u)rization system, which breaks down, will cause the failure of flue collector, and bad segmentation.
Basic model vapo(u)rization system needs the condition met (by 600MW unit design)
Embodiment 2: for the not high unit of flue temperature, referring to Fig. 3, in figure FGD be desulfurizing tower, AH be economizer,
ESP is deduster.Referring to fig. 4.
A kind of desulfurization wastewater treatment system, flue, desulfurizing tower and desulfurization wastewater processing dress including power plants generating electricity unit
It sets, it further includes the evaporator 2 for carrying out dry matter separation that the flue, which is equipped with economizer, air preheater and deduster, described
Atomizing lance 1 is inserted at the top of evaporator 2, and 2 upper end of evaporator introduces the tail gas of air preheater front end, and lower end is in dedusting
Merge before device with flue collector.Dry matter convenient for being formed after evaporation is absorbed by deduster.
Be expansion segment at the top of the evaporator 2, and expansion angle is greater than the spray angle of atomizing lance 1, avoid it is spraying with
Evaporator 2 contacts atomizing particle and is attached to 2 inner wall of evaporator, and 2 bottom of evaporator is contraction section, increases outlet pressure.
2 upper end of evaporator is connected to by air entraining pipe 3 with the flue of air preheater front end, and 2 lower end of evaporator passes through
Escape pipe 4 is connected to the flue of deduster front end, is equipped with regulating valve 5 on the air entraining pipe 3 and escape pipe 4.Regulating valve 5 is used for
Adjust the heating amount of evaporator.And evaporator can be disengaged as long as closing regulating valve when needing to repair evaporator,
Easy to disassemble and maintenance.
Disadvantage: 1. due to taking hot gas from economizer front end, and energy consumption slightly improves, and every degree electricity about increases by 1 gram of coal consumption；
Advantage: 1. due to taking heat from economizer front end, and the flue-gas temperature of economizer front end is able to satisfy needs completely, therefore suitable
Together in a variety of different exhaust gas temperature occasions；
2. vapo(u)rization system failure can be cut off at any time, will not have any impact to flue collector.
Modified vapo(u)rization system needs the condition met (by 600MW unit design)
Desulfurization wastewater treating capacity: 9.0-11.0m3/h
Maximum rated air consumption: 60Nm3/min
Minimum rated air consumption: 10Nm3/min
Atomizing lance can be inserted directly into auxiliary flue by embodiment 3 for the unit by auxiliary flue, scheme
Structural principle is identical as embodiment 3, avoids it dry in flue collector.
Exhaustive presentation has been carried out to a kind of processing unit of desulfurization wastewater provided by the present invention above, it is used herein
A specific example illustrates the principle and implementation of the invention, and the above embodiments are only used to help understand originally
The method and its core concept of invention；At the same time, for those skilled in the art, according to the thought of the present invention, specific
There will be changes in embodiment and application range, will be to change and improvement of the invention it is possible, without exceeding
The conception and scope of accessory claim defined, in conclusion the contents of this specification are not to be construed as limiting the invention.
Claims (10)
1. a kind of desulfurizing waste water processing device, it is characterised in that: including control system, air balance tank, desulfurization wastewater compensator
And atomizing lance, the air balance tank, desulfurization wastewater compensator pass through bypass line respectively and are connected with atomizing lance, described
Be equipped with the omnipotent regulating valve of high regulating ratio in bypass line, the control system in bypass line omnipotent regulating valve, into
The omnipotent valve of threeway, frequency converter and the waste water pump on omnipotent valve, input duct in feed channel carries out automatically controlling.
2. a kind of desulfurizing waste water processing device according to claim 1, it is characterised in that: the air balance tank is equipped with
Admission line, the pipeline that carries out are equipped with air pump and carry out the omnipotent valve of flow control.
3. a kind of desulfurizing waste water processing device according to claim 1, it is characterised in that: the desulfurization wastewater compensator is set
There is input duct, the input duct is equipped with three by the waste water pump of transducer drive and the big regulating ratio with reflux capability
Lead to omnipotent valve.
4. a kind of desulfurizing waste water processing device according to claim 1, it is characterised in that: the control system mainly by with
In the PLC logic controller of control, the electromagnetic flowmeter for detecting wastewater flow, the vortex-shedding meter of detection air mass flow, detection
The pressure transmitter of pressure forms, and the PLC logic controller is to the omnipotent regulating valve in bypass line, ten thousand on admission line
The omnipotent valve of threeway, frequency converter and waste water pump on energy threshold, input duct, which carry out automatically controlling, carries out electric signal control.
5. a kind of desulfurization wastewater treatment system according to claim 1, it is characterised in that: the atomizer has several
It is a, formed atomizer array, each atomizer by independent bypass line respectively with air balance tank, desulfurization wastewater
Compensator is connected to, and the omnipotent regulating valve of the high regulating ratio in bypass line forms omnipotent valve array.
6. a kind of desulfurization wastewater treatment system according to claim 1, it is characterised in that: the cigarette including power plants generating electricity unit
Road, desulfurizing tower and desulfurizing waste water processing device, the flue are equipped with economizer, air preheater and deduster, feature
Be: the atomizing lance is inserted directly into inside the flue of air preheater rear end of power plants generating electricity unit.
7. a kind of desulfurization wastewater treatment system according to claim 1, it is characterised in that: the cigarette including power plants generating electricity unit
Road, desulfurizing tower and desulfurizing waste water processing device, the flue are equipped with economizer, air preheater and deduster, feature
Be: the flue is equipped with auxiliary flue, and the auxiliary flue finally merges before deduster with flue collector, the atomization spray
In rifle insertion auxiliary flue.
8. a kind of desulfurization wastewater treatment system according to claim 1, it is characterised in that: the cigarette including power plants generating electricity unit
Road, desulfurizing tower and desulfurizing waste water processing device, the flue are equipped with economizer, air preheater and deduster, feature
It is: further includes the evaporator for carrying out dry matter separation, the atomizing lance is inserted at the top of evaporator, the evaporator upper end
The tail gas of air preheater front end is introduced, lower end merges before deduster with flue collector.
9. a kind of desulfurization wastewater treatment system according to claim 8, it is characterised in that: be expansion at the top of the evaporator
Section, and expansion angle is greater than the spray angle of atomizing lance, the base of evaporator is contraction section.
10. a kind of desulfurization wastewater treatment system according to claim 9, it is characterised in that: the evaporator upper end passes through
Air entraining pipe is connected to the flue of air preheater front end, and evaporator lower end is connected to by escape pipe with the flue of deduster front end,
Regulating valve is equipped on the air entraining pipe and escape pipe.
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Application publication date: 20190201 |