CN107089694A - A kind of swirling flow atomizing desulfurization wastewater coalescence dedusting self-adaptive processing device and method - Google Patents
A kind of swirling flow atomizing desulfurization wastewater coalescence dedusting self-adaptive processing device and method Download PDFInfo
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- 239000002351 wastewater Substances 0.000 title claims abstract description 162
- 230000003009 desulfurizing Effects 0.000 title claims abstract description 128
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 115
- 238000004581 coalescence Methods 0.000 title claims abstract description 26
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 110
- 239000003546 flue gas Substances 0.000 claims abstract description 110
- 230000003044 adaptive Effects 0.000 claims abstract description 29
- 238000000889 atomisation Methods 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 12
- 238000001704 evaporation Methods 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 16
- 239000000428 dust Substances 0.000 claims description 13
- 239000000725 suspension Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 230000001808 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 6
- 239000003500 flue dust Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 239000003344 environmental pollutant Substances 0.000 claims description 4
- 231100000719 pollutant Toxicity 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 238000005119 centrifugation Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 239000002918 waste heat Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 239000003517 fume Substances 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 5
- 235000019504 cigarettes Nutrition 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 238000002425 crystallisation Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000000875 corresponding Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L Calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000011068 load Methods 0.000 description 2
- 230000000149 penetrating Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000009692 water atomization Methods 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L Sulphite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000005591 charge neutralization Effects 0.000 description 1
- 238000005039 chemical industry Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxyl anion Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 230000003020 moisturizing Effects 0.000 description 1
- 230000001264 neutralization Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- 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
- C02F1/048—Purification of waste water by evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- 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
Abstract
The invention discloses a kind of swirling flow atomizing desulfurization wastewater coalescence dedusting self-adaptive processing device and method；Including boiler and flue gas waste water adaptive processing system；The flue gas of boiler sequentially passes through air preheater, back-end ductwork, electric cleaner and desulfurizing tower and finally discharged by chimney；Rotational flow atomizer is arranged in back-end ductwork；Desulfurization wastewater pond is provided with below desulfurizing tower；Desulfurization wastewater pond is sequentially connected swirling flow atomizing pump, magnetic valve, rotational flow atomizer by water pipe；Flue gas waste water adaptive processing system includes flue-gas temperature sensor, flue gas flow sensor, flue gas pressures sensor, wastewater temperature sensor, wastewater disposal basin liquid level sensor, wastewater flow sensor, atomizing pressure sensor and the wastewater treatment full working scope coupler based on multinomial balance model being connected with the sensor.Present treatment device can effectively realize desulfurization wastewater atomization, evaporation, coalescence, solve fouling, corrosion and blockage problem in flue evaporation.
Description
Technical field
The present invention relates to flue gas desulphurization dust removal field, more particularly to a kind of swirling flow atomizing desulfurization wastewater coalescence dedusting
Self-adaptive processing device and method.
Background technology
In recent years, with the fast development of economic society, China's thermoelectricity installed capacity constantly increases, but incident dirt
The increase for contaminating the total emission volumn of thing brings huge pressure to ecological environment, therefore flue gas desulfurization treatment technology is gradually closed
Note.Currently, Limestone-gypsum Wet Flue Gas Desulfurization Process technology is because with strong applicability, desulfuration efficiency is high, absorbent utilization rate is high, equipment
The advantages of running rate is high, desulfurizing agent lime stone abundance is cheap and easy to get, as most widely used, technology most ripe desulfurization work
Skill.
However, the pH of the desulfurization wastewater produced by this technique is 4~6, and contain substantial amounts of suspension (gypsum
Grain, silica, the hydroxide of aluminium and iron), oversaturated sulphite, sulfate, fluoride and micro heavy metal.This
Wherein it is much the first pollutant that control is required in national environmental standard, using chemistry such as conventional neutralization, flocculation, precipitations
Discharge index is also unable to reach after method processing.Due to the particularity of water quality, desulfurization wastewater intractability is larger, handles not up to standard
Serious water pollution will be caused.
At present, the difficulty in treatment of desulfurization wastewater mainly have it is following some：
1st, water quality, water are influenceed greatly by coal-fired, desulphurization system moisturizing and desulfurization operation condition, and variation water quality scope is very big；
2nd, concentration of suspension is high, and fine particle ratio is big, easily causes film filter dirt stifled；
3rd, silicon, magnesium isoconcentration are high, and calcium sulfate degree of supersaturation is high, and fouling tendency is strong, and membranous system fouling cleaning recovers difficult；
4th, when organic concentration is high, membranous system runnability is significantly affected, causes film dirt stifled.
Therefore, it is the focus of industry to the innovative research of heat-engine plant desulfurized waste water treatment process.Except traditional dosing,
Outside precipitation, press filtration, also have using techniques such as molecule membrane filtrations, but not only processing cost is high for these techniques, and difficult to realize zero
Discharge.
Currently, in the Zero-discharge treating process field of desulfurization wastewater, mainly there are two class process routes：Evaporative crystallization method and pot
Stove flue facture.
Evaporative crystallization method is introduced into desulfurization wastewater in special evaporator, and boiling is heated to by steam or electric heater
Rise so that the moisture in waste water gradually flashes to gas phase, and regelation, into liquid phase, obtains weight to separated gas phase water after cooling
It is multiple to utilize；Suspension and solable matter in waste water be trapped within the increase of cycles of concentration steaming raffinate in, finally with
Crystal form is separated out.Evaporative crystallization method is extensive because its heat transfer coefficient is high, operating flexibility is big, enter the advantages of water pretreatment is simple
Applied in the fields such as chemical industry, medicine, desalinization and wastewater treatment.But high energy consumption that evaporative crystallization method has, equipment
The shortcomings of easy fouling and big investment is the key factor for restricting its application.
And boiler flue facture is a kind of method in flue internal spraying evaporation process desulfurization wastewater.I.e. by certain
In spray regime, the boiler back end ductwork after desulfurization wastewater is atomized before penetrating electric cleaner so that the exhausted water after atomization
Rapid evaporation gasification under the heating of high-temperature flue gas is dropped in, and suspension therein then forms tiny solid with solable matter
Grain, is together caught by electrode into electric cleaner under the entrainment effect of flue gas stream, is excluded as ash content, realize the waste water of desulfurization
Near-zero release is handled.
Compared with traditional evaporative crystallization method, the equipment required for flue facture is simple, the extra chemistry without adding
Medicament, can effectively solve the problem that the number of devices present in current Waste Water Treatment is more, investment amount is huge, operating cost is high
The shortcomings of workload of high and repair and maintenance is larger；At the same time, the operation operating process of system is simple, the dirt in desulfurization wastewater
Contaminating thing turns into ash content exclusion, thus in the absence of the subsequent treatment problem of sludge；At the same time, boiler afterheat is rationally make use of,
Reach the purpose of environmental protection and energy saving.
At present, had a patented technology of substantial amounts of flue facture, but in its practical application successful case report compared with
It is few.Main cause is that desulfurization wastewater enters after flue, causes flue-gas temperature to reduce.Because boiler load is continually changing, boiler smoke
Tolerance and temperature also constantly change, and desulfurization wastewater, which is sprayed into, may bring the penetrating temperature that lights a cigarette to spend low, on the one hand be down to acid
Dew point, causes flue largely to corrode；On the other hand because the atomization difference and arrangement of nozzle are unreasonable, cause flue big
Measure ash deposit and slag buildup, wash away, cause flue blockage.Such as Chinese invention patent application (application publication number：CN101844819A, Shen
Please date of publication：2010-9-29) disclose a kind of heat-engine plant wet flue gas desulfurization waste-water flue spraying treatment method.This method exists
Two-fluid spray nozzle is arranged in flue after air preheater, and desulfurization wastewater is pumped into nozzle evaporation after atomization, with flue gas
Together discharge.Because arrangement of nozzles mode is unreasonable, waste water is difficult to abundant contact, heat exchange with flue gas, thus may lead
Cause atomized drop can not evaporating completely in a short time, cause boiler flue corrosion, wash away；On the other hand, this method is not to atomization
Wastewater flow control effectively, and what is taken is fixed atomization quantity, can not be to the cigarette after processing when unit operation working conditions change
Temperature degree is achieved effective control, and may bring the relevant issues of low-temperature corrosion.
In view of the above-mentioned problems, inventor is by repetition test, it is found that desulfurization wastewater sprays into temperature and its changing value, the spray of point
The flow field for entering rear heterogeneous fluid is the key for restricting desulfurization wastewater processing.Therefore, the efficient rotary that the present invention is invented using inventor
Atomizer is flowed by eddy flow placement technique, designs a set of wastewater treatment equipment being adapted with unit load and method, can be with
It is effective to realize desulfurization wastewater atomization, evaporation, coalescence, solve fouling, corrosion and blockage problem in flue evaporation hair.
The content of the invention
It is an object of the invention to the shortcoming and defect for overcoming above-mentioned prior art, there is provided a kind of swirling flow atomizing desulfurization wastewater
Coalescence dedusting self-adaptive processing device and method.Both the process problem of desulfurization wastewater had been solved, desulfuration efficiency is improved；Promote again
The coalescence of fine particle, improves the arresting efficiency of electric precipitation, reduces the discharge of fine particle；Effectively utilize boiler simultaneously
Waste heat, saves energy consumption.
The present invention is achieved through the following technical solutions：
A kind of swirling flow atomizing desulfurization wastewater coalescence dedusting self-adaptive processing device, including boiler 1 and flue gas waste water it is adaptive
Processing system 11；
The exhanst gas outlet of the boiler 1 is sequentially connected by flue：Air preheater 2, afterbody heating flue 3, electric cleaner
4th, desulfurizing tower 5；The flue gas that the boiler 1 is discharged sequentially passes through air preheater 2, afterbody heating flue 3, electric cleaner 4 and desulfurization
Tower 5, is finally discharged by chimney 8；
Multiple rotational flow atomizers 9 are disposed with the afterbody heating flue 3；
The side of desulfurizing tower 5 is provided with desulfurization wastewater pond 6, the desulfurization wastewater for collecting the generation of desulfurizing tower 5；
The desulfurization wastewater pond 6 is sequentially connected swirling flow atomizing pump 7, magnetic valve, rotational flow atomizer 9 by water pipe；
The flue gas waste water adaptive processing system 11 includes：Flue-gas temperature sensor, flue gas flow sensor, flue gas pressure
Force snesor, wastewater temperature sensor, wastewater disposal basin liquid level sensor, wastewater flow sensor, atomizing pressure sensor with
And the wastewater treatment full working scope coupler based on multinomial balance model being connected with the sensor；
The flue-gas temperature sensor, flue gas flow sensor are arranged in flue；
The wastewater temperature sensor, wastewater disposal basin liquid level sensor are arranged in desulfurization wastewater pond 6；
The wastewater flow sensor, atomizing pressure sensor are arranged on the water pipe line of magnetic valve and rotational flow atomizer 9
On；
The flue gas waste water adaptive processing system 11 uses Model coupling device and adaptive controller, mode input amount bag
Include flue gas flow Qp, wastewater disposal basin liquid level H, before processing flue gas pressures P1, before processing flue-gas temperature T1, flue gas pressures after processing
P2, flue-gas temperature T after processing2, wastewater pressure P3, wastewater temperature T3, atomizing pressure P4, atomization temperature T4, controlled quentity controlled variable is that atomization is useless
Water-carrying capacity Ql, i.e. regulation swirling flow atomizing pump pressure and valve opening, realize Self Adaptive Control.
The rotational flow atomizer 9 is multiple and the hot cigarette of afterbody after air preheater 2 is tangentially arranged in the way of eddy flow
On the same section in road 3, it is that desulfurization wastewater is atomized into 5-15 μm of fine droplets that it, which is acted on, by flue gas under bigger serface
Used heat evaporates.
The mode of the eddy flow refers to：The center line of rotational flow atomizer 9 is tangent with an imaginary circle；Where the imaginary circle
Plane is vertical with flow of flue gas direction；The center of circle of the imaginary circle is on the center line of flue；The imaginary diameter of a circle and cigarette
The ratio between the inscribed circle diameter in road is less than 1:2, for realizing that the desulfurization wastewater of flue gas and rotation at a high speed forms stable rotation in flue
Flow field, dust-laden heat smoke mutually intervolves suction with being atomized fine waste water drop generation, hits and mix.
Agitator 10 is provided with the desulfurization wastewater pond 6, for stirring desulphurization waste water, it is to avoid particulate matter is settled.
In the specific embodiment of the present invention, the desulfurization wastewater temperature under normal temperature in desulfurization wastewater pond is 25 DEG C, and air is pre-
The flue-gas temperature that hot device 2 is exported is 160 DEG C.When temperature drop control is at 2 DEG C or so after being atomized desulfurization wastewater cooling, according to flue
Thermal balance relation in 3 can obtain the ratio between desulfurization wastewater atomization flow and flue gas flow, when flue gas flow is 1,200,000 m3/h
When, desulfurization wastewater atomization flow is adjusted to 8-10m3/h.Flue-gas temperature T after processing2During less than 158 DEG C, automatically adjusting device will adjust
Valve opening is saved, realizes that cigarette temperature is stable.It is possible thereby to by Model coupling device and Self Adaptive Control according to different flue gas flow bars
Part automatically adjusts corresponding desulfurization wastewater atomization quantity, realizes the adaptive-flow control of desulfurization wastewater treatment system.
A kind of swirling flow atomizing desulfurization wastewater coalescence dedusting adaptive processing method, it comprises the following steps：
Step one：Desulfurization wastewater is pumped into rotational flow atomizer 9 by swirling flow atomizing pump 7, by the high-speed rotational of rotational flow atomizer 9
Centrifuge with after atomization, being sprayed into along circle of contact direction along afterbody heating flue 3, with the flue gas containing dust occur violent volume inhale,
Hit and mix；
Step 2：Solid particulate matter in desulfurization wastewater produces centrifugation, its fine water-spray and dust combination coalescence, quilt
Quick heating, moisture film is rapidly evaporated, and is entered with flue gas in electric cleaner 4；In eddy flow turbulent flow processes, the fine powder in flue gas
The rapid coalescence of the desulfurization wastewater particle of dirt and wetted perimeter is into bulky grain, while suspension and soluble pollutants in desulfurization wastewater,
Separate out and grow up in solid form, and together caught by electric cleaner 4, as ash content discharge system；
Now, flue gas waste water adaptive processing system 11 passes through the temperature and pressure change before and after real-time detection process flue gas
Gradient, with reference to flue gas flow, the pressure of rotational flow atomizer 9, is calculated by model, automatically adjusts swirling flow atomizing pump pressure and valve is opened
Degree, is adjusted into the wastewater flow rate of rotational flow atomizer 9, and depreciation is controlled within 2 DEG C at a temperature of making swirling flow atomizing region mixed flue gas,
And higher than 5 DEG C of flue dust dew-point temperature.
The automatic adjusument of flue gas waste water adaptive processing system 11 is according to also including following parameter：
For a specific embodiment：Under normal temperature, the desulfurization wastewater temperature in desulfurization wastewater pond is 25 DEG C, air preheater 2
The flue-gas temperature of outlet is 160 DEG C；
When temperature drop control is at 2 DEG C or so after being atomized desulfurization wastewater cooling, closed according to the thermal balance in afterbody heating flue 3
System, can obtain the ratio between desulfurization wastewater atomization flow and flue gas flow, when flue gas flow is 1,200,000 m3During/h, desulfurization wastewater mist
Change Flow-rate adjustment is 8-10m3/h；
Flue-gas temperature T after processing2During less than 158 DEG C, device is automatically adjusted by electromagnetic valve for adjusting aperture, realizes that cigarette temperature is steady
It is fixed；Thus corresponding desulfurization can be automatically adjusted according to different flue gas flow conditions by Model coupling device and Self Adaptive Control to give up
Water atomization amount, realizes the adaptive-flow control of desulfurization wastewater treatment system.
The present invention has the following advantages and effect relative to prior art：
1st, swirling flow atomizing pump pressure and valve opening are automatically adjusted by flue gas waste water adaptive processing system, it can be ensured that
Swirling flow atomizing area temperature will not be reduced to acid dew point, realize fibre selection, reduce the possibility of boiler flue corrosion；
2nd, nozzle is arranged in flue using eddy flow so that flue gas occurs violent volume suction with desulfurization wastewater, hit and mixed
Close, be together threadingly advanced in flue, realize uniform flow field, and make desulfurization wastewater there is time enough to reach evaporation state, it is to avoid
Drop washes away wall.
3rd, the desulfurization wastewater and flue gas of rotation occur in violent shock and mixed process at a high speed, and dust granules produce efficient
Coalescence and eddy flow advance, become bulky grain, are easy to deduster to catch, dust deposit in flue will not be caused to block.
4th, desulfurization wastewater is introduced into flue, can suitably reduces flue-gas temperature, reduced volume flow, draw so as to reduce
The power consumption of blower fan.
5th, the desulfurization wastewater being introduced into flue can improve the ratio resistance of dust granule in smoke moisture, reduction flue gas, by force
Change subparticle charged, be conducive to improving dust collector efficiency.
6th, rationally desulfurization wastewater is evaporated using boiler afterheat, the desulfurization wastewater treatment system phase with conventionally employed evaporator
Than greatly reducing energy consumption, having reached the purpose of energy-conservation.
7th, the moisture in desulfurization wastewater largely enters the water circulation that sulfur removal technology is participated in after desulfurizing tower, it is possible to decrease desulfurization work
Skill water consume.
8th, desulfurization wastewater rapid evaporation gasification, suspension and soluble solids therein in the flue before electric cleaner
Enter electric cleaner under the entrainment effect of air-flow and caught by electrode and remove, both solve the process problem of desulfurization wastewater, again
Efficiency of dust collection is improved, the zero discharge treatment of desulfurization wastewater is finally realized.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
Fig. 2 is A-A sectional views in Fig. 1；That is the distribution schematic diagram of rotational flow atomizer 9.
Embodiment
The present invention is more specifically described in detail with reference to specific embodiment.
As shown in Figure 1, 2.The invention discloses a kind of swirling flow atomizing desulfurization wastewater coalescence dedusting self-adaptive processing device, bag
Include boiler 1 and flue gas waste water adaptive processing system 11；
The exhanst gas outlet of the boiler 1 is sequentially connected by flue：Air preheater 2, afterbody heating flue 3, electric cleaner
4th, desulfurizing tower 5；The flue gas that the boiler 1 is discharged sequentially passes through air preheater 2, afterbody heating flue 3, electric cleaner 4 and desulfurization
Tower 5, is finally discharged by chimney 8；
Multiple rotational flow atomizers (9) are disposed with the back-end ductwork (3)；
The side of desulfurizing tower 5 is provided with desulfurization wastewater pond 6, the desulfurization wastewater for collecting the generation of desulfurizing tower 5；
Desulfurization wastewater is atomized into the atomizing particle that particle diameter is less than 15 μm by rotational flow atomizer 9, and the big I of atomizing particle is led to
Cross the regulation valve regulation of rotational flow atomizer 9.
The desulfurization wastewater pond 6 is sequentially connected swirling flow atomizing pump 7, magnetic valve, rotational flow atomizer 9 by water pipe；Eddy flow mist
Change the entrance of pump 7 and rotary sieve is installed.
The flue gas waste water adaptive processing system 11 includes：Flue-gas temperature sensor, flue gas flow sensor, flue gas pressure
Force snesor, wastewater temperature sensor, wastewater disposal basin liquid level sensor, wastewater flow sensor, atomizing pressure sensor with
And the wastewater treatment full working scope coupler based on multinomial balance model being connected with the sensor；
The flue-gas temperature sensor, flue gas flow sensor are arranged in flue；
The wastewater temperature sensor, wastewater disposal basin liquid level sensor are arranged in desulfurization wastewater pond 6；
The wastewater flow sensor, atomizing pressure sensor are arranged on the water pipe line of magnetic valve and rotational flow atomizer 9
On；
The flue gas waste water adaptive processing system 11 uses Model coupling device and adaptive controller, mode input amount bag
Include flue gas flow Qp, wastewater disposal basin liquid level H, before processing flue gas pressures P1, before processing flue-gas temperature T1, flue gas pressures after processing
P2, flue-gas temperature T after processing2, wastewater pressure P3, wastewater temperature T3, atomizing pressure P4, atomization temperature T4, controlled quentity controlled variable is that atomization is useless
Water-carrying capacity Ql, i.e. regulation swirling flow atomizing pump pressure and valve opening, realize Self Adaptive Control.
The rotational flow atomizer 9 is multiple and the hot cigarette of afterbody after air preheater 2 is tangentially arranged in the way of eddy flow
On the same section in road 3, it is that desulfurization wastewater is atomized into 5-15 μm of fine droplets that it, which is acted on, by flue gas under bigger serface
Used heat evaporates.
The mode of the eddy flow refers to：The center line of rotational flow atomizer 9 is tangent with an imaginary circle；Where the imaginary circle
Plane is vertical with flow of flue gas direction；The center of circle of the imaginary circle is on the center line of flue；The imaginary diameter of a circle and cigarette
The ratio between the inscribed circle diameter in road is less than 1:2, for realizing that the desulfurization wastewater of flue gas and rotation at a high speed forms stable rotation in flue
Flow field, dust-laden heat smoke mutually intervolves suction with being atomized fine waste water drop generation, hits and mix.
The bottom slurry of desulfurizing tower 5 is after dewater treatment, and the desulfurization wastewater of separation is stored in desulfurization wastewater pond 6；It is described
Agitator 10 is provided with desulfurization wastewater pond 6, for stirring desulphurization waste water, it is to avoid particulate matter is settled.
Its general principles are as follows：
1. desulfurization wastewater is atomized into less than 10 μm of droplet using efficient rotational flow atomizer, while in desulfurization wastewater
Suspension is separated under rotational flow atomizer centrifugal action with waste water；
2. the nozzle of rotational flow atomizer is arranged in flue using eddy flow so that with desulfurization wastewater violent volume occurs for flue gas
Inhale, hit and mix, be together threadingly advanced with flue dust in flue, promote particle coalescence.Using point of multiple rotational flow atomizers
Cloth, not only uniform flow field, and avoid drop and wash away wall.
3. utilizing auto-adaptive control theory, by detecting flue-gas temperature and flow in real time, rotational flow atomizer pressure passes through fortune
Calculate, automatically adjust swirling flow atomizing pump pressure and waterwater entrance aperture, it is ensured that the temperature drop of eddy flow range of atomization is no more than 2 under variable working condition
DEG C and mixing temperature be higher than 5 DEG C of flue dust dew-point temperature.
Swirling flow atomizing desulfurization wastewater coalescence dedusting adaptive processing method of the present invention, it comprises the following steps：
Step one：Desulfurization wastewater is pumped into rotational flow atomizer 9 by swirling flow atomizing pump 7, by the high-speed rotational of rotational flow atomizer 9
Centrifuge with after atomization, being sprayed into along circle of contact direction along afterbody heating flue 3, with the flue gas containing dust occur violent volume inhale,
Hit and mix；
Step 2：Solid particulate matter in desulfurization wastewater produces centrifugation, its fine water-spray and dust combination coalescence, quilt
Quick heating, moisture film is rapidly evaporated, and is entered with flue gas in electric cleaner 4；In eddy flow turbulent flow processes, the fine powder in flue gas
The rapid coalescence of the desulfurization wastewater particle of dirt and wetted perimeter is into bulky grain, while suspension and soluble pollutants in desulfurization wastewater,
Separate out and grow up in solid form, and together caught by electric cleaner 4, as ash content discharge system；
Now, flue gas waste water adaptive processing system 11 passes through the temperature and pressure change before and after real-time detection process flue gas
Gradient, with reference to flue gas flow, the pressure of rotational flow atomizer 9, is calculated by model, automatically adjusts swirling flow atomizing pump pressure and valve is opened
Degree, is adjusted into the wastewater flow rate of rotational flow atomizer 9, and depreciation is controlled within 2 DEG C at a temperature of making swirling flow atomizing region mixed flue gas,
And higher than 5 DEG C of flue dust dew-point temperature.
The automatic adjusument of flue gas waste water adaptive processing system 11 is according to also including following parameter：
For a specific embodiment：Under normal temperature, the desulfurization wastewater temperature in desulfurization wastewater pond is 25 DEG C, air preheater 2
The flue-gas temperature of outlet is 160 DEG C；
When temperature drop control is at 2 DEG C or so after being atomized desulfurization wastewater cooling, closed according to the thermal balance in afterbody heating flue 3
System, can obtain the ratio between desulfurization wastewater atomization flow and flue gas flow, when flue gas flow is 1,200,000 m3During/h, desulfurization wastewater mist
Change Flow-rate adjustment is 8-10m3/h；
Flue-gas temperature T after processing2During less than 158 DEG C, device is automatically adjusted by electromagnetic valve for adjusting aperture, realizes that cigarette temperature is steady
It is fixed；Thus corresponding desulfurization can be automatically adjusted according to different flue gas flow conditions by Model coupling device and Self Adaptive Control to give up
Water atomization amount, realizes the adaptive-flow control of desulfurization wastewater treatment system.
As described above, the present invention can be better realized.
Embodiments of the present invention are simultaneously not restricted to the described embodiments, other any Spirit Essences without departing from the present invention
With the change made under principle, modification, replacement, combine, simplify, should be equivalent substitute mode, be included in the present invention
Within protection domain.
Claims (5)
1. a kind of swirling flow atomizing desulfurization wastewater coalescence dedusting self-adaptive processing device, it is characterised in that：Including boiler (1) and flue gas
Waste water adaptive processing system (11)；
The exhanst gas outlet of the boiler (1) is sequentially connected by flue：Air preheater (2), afterbody Yan Re roads (3), electric precipitation
Device (4), desulfurizing tower (5)；The flue gas of boiler (1) discharge sequentially passes through air preheater (2), afterbody heating flue (3), electricity and removed
Dirt device (4) and desulfurizing tower (5), are finally discharged by chimney (8)；
Multiple rotational flow atomizers (9) are disposed with the afterbody heating flue (3)；
Desulfurization wastewater pond (6) are provided with by the desulfurizing tower (5), the desulfurization wastewater for collecting desulfurizing tower (5) generation；
The desulfurization wastewater pond (6) is sequentially connected swirling flow atomizing pump (7), magnetic valve, rotational flow atomizer (9) by water pipe；
The flue gas waste water adaptive processing system (11) includes：Flue-gas temperature sensor, flue gas flow sensor, flue gas pressures
Sensor, wastewater temperature sensor, wastewater disposal basin liquid level sensor, wastewater flow sensor, atomizing pressure sensor and
The wastewater treatment full working scope coupler based on multinomial balance model being connected with the sensor；
The flue-gas temperature sensor, flue gas flow sensor are arranged in flue；
The wastewater temperature sensor, wastewater disposal basin liquid level sensor are arranged in desulfurization wastewater pond (6)；
The wastewater flow sensor, atomizing pressure sensor are arranged on the water pipe line of magnetic valve and rotational flow atomizer (9)；
The flue gas waste water adaptive processing system (11) uses Model coupling device and adaptive controller, and mode input amount includes
Flue gas flow Qp, wastewater disposal basin liquid level H, before processing flue gas pressures P1, before processing flue-gas temperature T1, flue gas pressures P after processing2、
Flue-gas temperature T after processing2, wastewater pressure P3, wastewater temperature T3, atomizing pressure P4, atomization temperature T4, controlled quentity controlled variable is atomization waste water stream
Measure Ql, i.e. regulation swirling flow atomizing pump pressure and valve opening, realize Self Adaptive Control.
2. swirling flow atomizing desulfurization wastewater coalescence dedusting self-adaptive processing device according to claim 1, it is characterised in that：It is described
Rotational flow atomizer (9) is multiple and the afterbody heating flue (3) after air preheater (2) is tangentially arranged in the way of eddy flow
On same section, it is that desulfurization wastewater is atomized into 5-15 μm of fine droplets that it, which is acted on, by fume waste heat under bigger serface
Evaporation.
3. swirling flow atomizing desulfurization wastewater coalescence dedusting self-adaptive processing device according to claim 2, it is characterised in that：It is described
The mode of eddy flow refers to：The center line of rotational flow atomizer (9) is tangent with an imaginary circle；Plane and flue gas where the imaginary circle
Flow direction is vertical；The center of circle of the imaginary circle is on the center line of flue；The inscribed circle of the imaginary diameter of a circle and flue
Diameter ratio is less than 1:2, for realizing that the desulfurization wastewater of flue gas and rotation forms stable eddy flow field, dust-laden heat smoke in flue
Suction is mutually intervolved with being atomized fine waste water drop generation, hits and mixes.
4. swirling flow atomizing desulfurization wastewater coalescence dedusting self-adaptive processing device according to claim 3, it is characterised in that：It is described
Agitator (10) is provided with desulfurization wastewater pond (6), for stirring desulphurization waste water, it is to avoid particulate matter is settled.
5. a kind of swirling flow atomizing desulfurization wastewater coalescence dedusting adaptive processing method, it is characterised in that using described in claim 4
Swirling flow atomizing desulfurization wastewater coalescence dedusting self-adaptive processing device realizes that it comprises the following steps：
Step one：Desulfurization wastewater is pumped into rotational flow atomizer (9) by swirling flow atomizing pump (7), by rotational flow atomizer (9) eddy flow from
The heart is separated with after atomization, being sprayed into along circle of contact direction in afterbody heating flue (3), with the flue gas containing dust occur volume inhale, hit and
Mixing；
Step 2：Solid particulate matter in desulfurization wastewater produces centrifugation, its water smoke and dust combination coalescence, is quickly added
Heat, moisture film is rapidly evaporated, and is entered with flue gas in electric cleaner (4)；In eddy flow turbulent flow processes, dust and wetted perimeter in flue gas
Desulfurization wastewater particle coalescence into bulky grain, while suspension and soluble pollutants in desulfurization wastewater, in solid form
Precipitation is grown up, and is together caught by electric cleaner (4), as ash content discharge system；
Now, flue gas waste water adaptive processing system (11) passes through the temperature before and after real-time detection process flue gas and pressure change ladder
Degree, with reference to flue gas flow, rotational flow atomizer (9) pressure, is calculated by model, automatically adjusts swirling flow atomizing pump pressure and valve is opened
Degree, is adjusted into the wastewater flow rate of rotational flow atomizer (9), make at a temperature of the mixed flue gas of swirling flow atomizing region depreciation control 2 DEG C with
It is interior, and higher than 5 DEG C of flue dust dew-point temperature.
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| CN113104917A (en) * | 2021-04-07 | 2021-07-13 | 武汉天和技术股份有限公司 | Automatic spraying and evaporating system for main flue of desulfurization waste water boiler |
| CN113501559B (en) * | 2021-07-29 | 2022-06-10 | 南方电网电力科技股份有限公司 | Method and device for adjusting desulfurization wastewater, electronic equipment and storage medium |
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