CN105692745B - A kind of hybrid flue gas is evaporated desulfurization wastewater device and method - Google Patents
A kind of hybrid flue gas is evaporated desulfurization wastewater device and method Download PDFInfo
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- CN105692745B CN105692745B CN201610116413.5A CN201610116413A CN105692745B CN 105692745 B CN105692745 B CN 105692745B CN 201610116413 A CN201610116413 A CN 201610116413A CN 105692745 B CN105692745 B CN 105692745B
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- flue gas
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- desulfurization wastewater
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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
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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
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
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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
- 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
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
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- Treating Waste Gases (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The present invention relates to a kind of hybrid flue gases to be evaporated desulfurization wastewater device and method.Existing boiler smoke is evaporated desulfurization wastewater mode there are wall sticking phenomenon or blocks flue phenomenon, and desulfuration efficiency is low.The present invention includes that gaseous mixture is evaporated desulfurization portion and the quenched desulfurization portion of gas, it includes drying tower, Wastewater Pretreatment pipeline and mixed gas pipeline that gaseous mixture, which is evaporated desulfurization portion, drying tower is led to by offgas duct and flue main pipe, gaseous mixture pipeline includes supervisor, the first branch pipe and the second branch pipe for leading to and flowing through the air preheater with outside air, and the outside air of flue gas and heating is mixed and fed into drying tower and carries out being evaporated processing to desulfurization wastewater.Effectively solve the wall sticking phenomenon that gaseous mixture occurs in evaporation drying desulfurization wastewater, ensure drying tower service life, the influence because using outside air to boiler efficiency can also be effectively reduced, effectively improve desulfuration efficiency, desulfurization wastewater amount can also be reduced, and then mitigate the live load of evaporation operation, reduce the thermal losses for evaporating desulfurization wastewater.
Description
Technical field
The present invention relates to steam turbine power generation fields, and in particular to boiler smoke is evaporated desulfurization wastewater device and method.
Background technology
Coal forms the gaseous pollutant of sulfur-bearing in boiler after burning, these substances can enter tail with boiler exhaust gas
Feed channel, and pass through economizer, SCR successively（Selective catalytic reactor）、AH（Air preheater）、ESP（Electric precipitator）Afterwards
By FGD（Desulfuration absorbing tower）After absorption, the concentrate of desulfuration absorbing tower（Include a variety of salts）It arranges, holds outside in the form of desulfurization wastewater
Secondary pollution is easily caused, is arranged outside desulfurization wastewater to eliminate, in the prior art frequently with L-shaped desulfuration waste water flue gas evaporating device
Or the processing of gas bypass processing unit, the equal existing defects of both processing units：L-shaped desulfuration waste water flue gas evaporating device due to
Desulfurization wastewater is injected directly into flue so that desulfurization wastewater directly evaporates in flue, and the salinity in waste water is caused to be easy in cigarette
It is deposited in road and then leads to flue blockage, influence unit safety operation；And existing gas bypass processing unit is because being introduced separately into
, easily there is wall sticking phenomenon in be evaporated heat source of the high ash content flue gas as desulfurization wastewater, to make drying tower operation cannot normally into
Row, has an effect on equipment life.If in addition, individually using the hot-air of air preheater as the heat source being evaporated, compare heat smoke
It says, boiler efficiency is influenced big；Meanwhile the discharge capacity of desulfurization wastewater be also influence boiler efficiency medical university's factor, it is necessary to have with
Mating decrement measure and technology.
Invention content
In order to solve the deficiencies in the prior art, a kind of hybrid flue gas of present invention offer is evaporated desulfurization wastewater device and side
Method is evaporated the cooperation of desulfurization portion by the quenched decrement desulfurization wastewater portion of gas and gaseous mixture and realizes that flue gas batch is evaporated desulfurization wastewater,
And hot-air is introduced in gaseous mixture to reduce flue gas ash content, and then it is effectively improved wall sticking phenomenon, and ensureing will be to boiler efficiency
Influence be preferably minimized.
The present invention is accomplished by the following way：A kind of hybrid flue gas is evaporated desulfurization wastewater device, including one and boiler smoke
The desulfurizer of road main pipe cooperation, the flue main pipe includes the scr reactor being sequentially connected in series, air preheat
Device, the first flue gas waste heat recoverer, electric precipitator, desulfurizing tower, the second flue gas waste heat recoverer and chimney, the desulfurization wastewater
It is evaporated device and is evaporated desulfurization wastewater portion and the quenched desulfurization portion of a gas including a gaseous mixture, the gaseous mixture is evaporated desulfurization portion and includes
One drying tower, the Wastewater Pretreatment pipeline led to the desulfurizing tower and a mixed gas pipeline, the drying tower pass through one
Offgas duct is led to the flue main pipe, and the gaseous mixture pipeline includes the supervisor led to a drying tower, connect and is located at
Between the scr reactor and air preheater the first branch pipe of flue main pipe and lead to outside air and
The second branch pipe of the air preheater is flowed through, flue gas is mixed and fed into drying tower to desulfurization wastewater with the outside air after heating
It carries out being evaporated processing.Second led to free surrounding space will be added on the smoke inlet pipe of original gas bypass processing unit
Pipe passes through export the high ash content flue gas drawn from flue main pipe and air preheater since the content of ashes of hot-air is extremely low
Part hot-air mixes to play the role of reducing gaseous mixture content of ashes, and it is useless in evaporation drying desulfurization both effectively to solve gaseous mixture
The wall sticking phenomenon occurred when water, it is ensured that drying tower service life, moreover it is possible to effectively reduce because using the part heat that air preheater exports empty
Influence of the gas to boiler efficiency, in addition, the quenched desulfurization portion of gas is also added in desulfurizer, before flue gas is by desulfurizing tower
First carry out first time desulfurization（Remove hydrogen chloride and hydrogen fluoride simultaneously）Operation, by flue main pipe spray into lye come with sour gas
Precursor reactant forms solid particle, and the solid particle of formation is realized outer row using the electric precipitator in flue main pipe, both changed original
Desulfurizer only by the present situation of an approach desulfurization, effectively improves desulfuration efficiency, moreover it is possible to reduce desulfurization wastewater amount, and then mitigate
The live load of operation is evaporated, reduces the thermal losses for evaporating desulfurization wastewater, it is ensured that boiler normal operation.Outside air exists
It needs to carry out the pre-heat treatment before mixing with high-temperature flue gas, had both ensured that gaseous mixture had the heat for being sufficiently used for evaporation desulfurization wastewater,
Also be avoided that leads to the problem of local desulfurization wastewater cannot be evaporated in time in drying tower because hot and cold air mixes unevenness, and then keeps away
Exempt from desulfurization wastewater to mix with ash content and the case where viscous wall occur.
Preferably, being equipped with controllable register door on first branch pipe and the second branch pipe, the supervisor is equipped with a control
Valve processed, described supervisor one end are led to the drying tower, and the other end leads to first branch pipe and the second branch pipe respectively.Set up separately
Controllable register door on the first branch pipe and the second branch pipe realizes high ash content flue gas and low ash content outside air by cooperating
Mixed proportion, and then gaseous mixture ingredient is adjusted according to the situation in drying tower, has both effectively avoided viscous wall from happening, also answered
It reduces outside air input quantity to the greatest extent, and then reduces the influence to normal operation of boiler；Supervisor plays unified conveying gaseous mixture
It acts on, the control valve on supervisor is used to adjust the gas input for being sent into drying tower, it is ensured that gaseous mixture input quantity and desulfurization wastewater
It is flux matched.
Preferably, the drying tower top be equipped with one with it is described be responsible for the scroll casing type air distributor that leads to and one with
The centrifugal type atomizer that the Wastewater Pretreatment pipeline leads to, the drying tower lower part are equipped with solid discharge mouth.Due in supervisor
Flue gas and outside air mixing it is uneven, there are local ash content Density inhomogeneity, each different feelings of portion's temperature in gaseous mixture
Condition, so needing to realize reduction gaseous mixture ash content density by scroll casing type air distributor in supervisor and ensuring mixed air temperature
Balanced purpose is spent, scroll casing type air distributor also acts as the effect for equably spreading gaseous mixture to each portion of drying tower, it is ensured that
Gaseous mixture is uniformly contacted with misty desulfurization wastewater.The Wastewater Pretreatment pipeline is converted desulfurization wastewater by centrifugal type atomizer
Each portion of drying tower is diffused to for mist and uniformly, heat transfer is improved by expanding the contact area of desulfurization wastewater and gaseous mixture
Efficiency, and then improve water evaporation rate.The solid particle that moisture in desulfurization wastewater is formed after being evaporated can utilize itself weight
Power descends slowly and lightly to the bottom of drying tower, and the solid particle that solid discharge mouth is used to gather is arranged outside.
Preferably, leading in the middle part of described offgas duct one end and the drying tower, the other end is connected to positioned at described first
In flue main pipe between flue gas waste heat recoverer and electric precipitator.Offgas duct is used for the gas discharging in drying tower to flue mother
The outer ranking of Guan Zhong, offgas duct are arranged in after the flue gas heater of flue main pipe and before electric precipitator, due in drying tower
The gaseous mixture of outer row is declined by temperature after evaporating operation, so to be passed through the area that flue main pipe is located at after flue gas heater
Section so that the two temperature is approximate, and then reduces the influence to flue mother's inner tube smoke, due to the fraction solids particle in drying tower
It can together blow out with the tail gas of outer row, be arranged outside solid particle it is therefore desirable to be realized by electric precipitator, effectively improve desulfurization effect
Rate.
Preferably, the Wastewater Pretreatment pipeline includes three headers contacted successively, preliminary sedimentation device, inspissator and charging
The desulfurization wastewater pipe of pump, desulfurization wastewater pipe one end are led to the desulfurizing tower, and the other end is logical with the centrifugal type atomizer
Even.The desulfurization wastewater concentration that desulfurizing tower is formed is relatively low and quantity is larger, if all being handled using evaporation mode, both desulfuration efficiency was low
Under, it is also necessary to consumption is largely used to the heat of evaporable water, increases desulphurization cost, can also influence unit normal operation, so
It needs to carry out advance purification, concentration, both effectively ensures the disengaging efficiency of sulphur-containing substance, also reduce thermal losses to the greatest extent.
Preferably, the quenched desulfurization portion of gas includes a lye reserve tank and an alkali lye pipeline with infusion pump,
Described alkali lye pipeline one end is led to the lye reserve tank, and the other end is connected to positioned at the air preheater and described first
In flue main pipe between flue gas waste heat recoverer.Lye reserve tank is used to store the lye for neutralizing sulphur-containing substance, and lye passes through defeated
Liquid pump is sent into flue main pipe, and reacts to form solid particle with the sulphur-containing substance in flue gas, and solid particle is arranged outside electric precipitator.
Lye is admitted in the flue main pipe between the air preheater and first flue gas waste heat recoverer, due to the section flue
Flue gas in main pipe also has more heat, has both effectively improved the reaction rate of lye and sulphur-containing substance, moreover it is possible to by rapid
The mode of moisture in lye is issued additional to avoid wall sticking phenomenon.
A kind of hybrid flue gas is evaporated desulfurization wastewater method, and desulfurization work is realized by the following method in the flue gas arranged outside boiler
Industry：First, the flue gas in flue main pipe is formed with the misty alkaline reaction of flue main pipe is sprayed by the quenched desulfurization portion of gas
Solid particle, solid particle realize that amount of sulfur contenting in smoke reduces by being arranged outside electric precipitator；Secondly, flue gas is formed de- by desulfurizing tower
Sulphur waste water, desulfurization wastewater settled successively by Wastewater Pretreatment pipeline, enrichment process and is sprayed by centrifugal type atomizer
Drying tower, at the same time, drying tower obtain evaporation desulfurization wastewater high-temperature mixed gas, the gaseous mixture by gaseous mixture pipeline
Body includes the outside air preheated and the bypass flue gas introduced from flue main pipe；Finally, the desulfurization of mixed gas and atomization is useless
Water contacts in drying tower, and the moisture evaporation in desulfurization wastewater forms vapor, and sulfur-containing solid is formed after desulfurization wastewater dehydration
Grain, the mixed gas for carrying vapor secretly are imported by offgas duct in flue main pipe, and solid particle drops to dry tower bottom and quilt
Outer row.The sulfur-containing smoke gas being discharged from boiler forms the solid particle of sulfur-bearing by way of spraying lye first, then passes through evaporation
The mode of desulfurization wastewater forms sulfur-containing solid particle, and being evaporated desulfurization portion by the quenched desulfurization portion of gas and gaseous mixture is used cooperatively,
There is higher desulfuration efficiency relative to desulfurization means and mode single in original technology.
Preferably, the bypass flue gas is located at quoted from the flue main pipe before first flue gas waste heat recoverer
Section, the outside air complete preheating procedure by the air preheater, and outside air passes through scroll casing type air with flue gas
Distributor uniformly mixes, and the mixed proportion between the bypass flue gas and outside air is by setting up separately in the first branch pipe and the second branch pipe
On controllable register gate system.The mixed gas for carrying vapor secretly is sent into the flue main pipe and is located at described the by the offgas duct
Section between one flue gas waste heat recoverer and electric precipitator is formed and with mixed flue gas using being come outside electric precipitator in drying tower
The solid particle of outer row.
The protrusion advantageous effect of the present invention：One and the external world will be added on the smoke inlet pipe of original gas bypass processing unit
The second branch pipe that space is led to both effectively had solved the wall sticking phenomenon that gaseous mixture occurs in evaporation drying desulfurization wastewater, it is ensured that dry
Dry tower service life, moreover it is possible to the influence because using outside air to boiler efficiency is effectively reduced, in addition, also increasing in desulfurizer
The quenched desulfurization portion of gas is added, first time desulfuration operations is first carried out before flue gas is by desulfurizing tower, then has been evaporated by gaseous mixture de-
Sulphur portion carries out the second desulfuration operations, had both changed original desulfurizer only by the present situation of an approach desulfurization, and had effectively improved desulfurization
Efficiency, moreover it is possible to reduce desulfurization wastewater amount, and then mitigate the live load of evaporation operation, reduce the heat for evaporating desulfurization wastewater
Loss, it is ensured that boiler normal operation.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention；
In figure：1, flue main pipe, 2, scr reactor, 3, air preheater, the 4, first fume afterheat returns
Receive device, 5, electric precipitator, 6, desulfurizing tower, 7, drying tower, 8, offgas duct, 9, supervisor, the 10, first branch pipe, the 11, second branch pipe, 12,
Control valve, 13, scroll casing type air distributor, 14, centrifugal type atomizer, 15, solid discharge mouth, 16, three headers, 17, preliminary sedimentation device,
18, inspissator, 19, feed pump, 20, lye reserve tank, 21, infusion pump.
Specific implementation mode
The substantive distinguishing features of the present invention are further described with specific implementation mode with reference to the accompanying drawings of the specification.
A kind of hybrid flue gas as shown in Figure 1 is evaporated desulfurization wastewater device, from one and taking off with boiler flue main pipe 1
Sulphur device forms, and the flue main pipe 1 includes scr reactor 2, the air preheater 3, first being sequentially connected in series
Flue gas waste heat recoverer 4, electric precipitator 5, desulfurizing tower 6, the second flue gas waste heat recoverer and chimney, the desulfurizer include
One gaseous mixture is evaporated desulfurization portion and the quenched desulfurization portion of a gas, the gaseous mixture be evaporated desulfurization portion include a drying tower 7, with it is described
The Wastewater Pretreatment pipeline and a mixed gas pipeline that desulfurizing tower 6 leads to, the drying tower 7 by an offgas duct 8 with it is described
Flue main pipe 1 is led to, and the gaseous mixture pipeline includes the supervisor 9 led to a drying tower 7, connect positioned at the selectivity
First branch pipe 10 of flue main pipe 1 and lead to outside air between catalytic reduction reactor 2 and air preheater 3 and flow through institute
State the second branch pipe 11 of air preheater 3, the outside air of flue gas and heating is mixed and fed into drying tower 7 and is carried out to desulfurization wastewater
It is evaporated processing.
A kind of hybrid flue gas implemented according to above structure is evaporated desulfurization wastewater method, the flue gas arranged outside boiler by with
Lower method realizes desulfuration operations：First, the flue gas in flue main pipe 1 sprays into flue main pipe 1 with by the quenched desulfurization portion of gas
Misty alkaline reaction forms solid particle, and solid particle passes through to arrange outside electric precipitator 5 realizes that amount of sulfur contenting in smoke reduces；Secondly,
Flue gas forms desulfurization wastewater by desulfurizing tower 6, desulfurization wastewater settled successively by Wastewater Pretreatment pipeline, enrichment process simultaneously
Drying tower 7 is sprayed by centrifugal type atomizer 14, at the same time, drying tower 7 obtains evaporation desulfurization wastewater by gaseous mixture pipeline
With high-temperature mixed gas, the mixed gas includes the outside air preheated and the bypass flue gas introduced from flue main pipe 1；Most
Afterwards, mixed gas is contacted with the desulfurization wastewater of atomization in drying tower 7, and the moisture evaporation in desulfurization wastewater forms vapor, is taken off
Sulfur-containing solid particle is formed after the dehydration of sulphur waste water, the mixed gas for carrying vapor secretly is imported by offgas duct 8 in flue main pipe 1,
Solid particle drops to 7 bottom of drying tower and by outer row.
In practical operation, the flue gas that boiler generates can be with arranging, due to the sulfur-bearing object of solid granular outside flue main pipe 1
Matter can be arranged outside electric precipitator 5, so existing sulfurous gas in a gaseous form in the technical program mainly removal flue gas, contains
Sulphur gas occurs to chemically react and forms solid particle with lye first, can not be removed by electricity with the sulfurous gas of alkaline reaction
It is desulfurized tower 6 after dirt device 5 to absorb and be dissolved in desulfurization wastewater, desulfurization wastewater is admitted to drying tower after the pretreatments such as concentration
It is dried and is formed in 7 convenient for the solid particle of outer row.There is sulfurous gas in the flue gas introduced by the first branch pipe 10, this
Portion gas can be completed to be evaporated after operation in drying tower 7 imports flue main pipe 1 again by offgas duct 8, and is desulfurized the receipts of tower 6
Collection enters Wastewater Pretreatment pipeline.The bypass flue gas is located at first flue gas waste heat recoverer 4 quoted from the flue main pipe 1
Section before, the outside air complete preheating procedure by the air preheater 3, and outside air passes through spiral case with flue gas
Formula air distributor 13 uniformly mixes, and the mixed proportion between the bypass flue gas and outside air is by setting up separately in the first branch pipe 10
System is gated with the controllable register on the second branch pipe 11.
In practical operation, 8 one end of the offgas duct is led to 7 middle part of the drying tower, and the other end is connected to positioned at institute
It states in the flue main pipe 1 between the first flue gas waste heat recoverer 4 and electric precipitator 5.The offgas duct 8 will carry the mixing of vapor secretly
Gas is sent into section of the flue main pipe 1 between first flue gas waste heat recoverer 4 and electric precipitator 5, is removed using electricity
It comes and is formed in drying tower 7 and with the solid particle arranged outside mixed flue gas outside dirt device 5.
In practical operation, the quenched desulfurization portion of gas includes an alkali of the lye reserve tank 20 and one with infusion pump 21
Liquid pipe road, described alkali lye pipeline one end are led to the lye reserve tank 20, and the other end is connected to positioned at the air preheater 3
In flue main pipe 1 between first flue gas waste heat recoverer 4.Lye reserve tank 20 can have both lye it is quenched and storage
Function, and the dosage and concentration of lye are adjusted according to the response situation in lye penetrating flue main pipe 1, and then meet gas tune
The desulfurization requirement in matter desulfurization portion.It when in use, can be with when the solid particle forming amount after lye sprays into flue main pipe 1 is on the low side
Increase lye straying quatity or improve the mode of concentration of lye and operated, efficiency is arranged outside sweetening substance to improve, when passing through
Solid particle forming amount is when dramatically increasing after increasing lye straying quatity or improving concentration, by reduce lye straying quatity or
The mode that person reduces concentration of lye operates, to reduce production cost.One end of alkali lye pipeline is connected to positioned at the air
In flue main pipe 1 between preheater 3 and first flue gas waste heat recoverer 4, lye can also be adjusted according to actual conditions
The installation site of pipeline has both and facilitates installation and the advantages of compared with high desulfurization efficiency, also should be regarded as specific embodiments of the present invention.
In practical operation, the lye is preferably calcium hydroxide solution, can also according to circumstances use other ingredients
Lye, such as sodium hydroxide solution, are regarded as specific embodiments of the present invention.
In practical operation, one end of the second branch pipe 11 is led to free surrounding space, and is equipped with protective cover, prevents foreign matter from passing through
Second branch pipe 11 enter drying tower 7, the second branch pipe 11 pass through the air preheater 3, and with original cigarette in air preheater 3
Feed channel and boiler air hose are mutual indepedent, have both realized the purpose that outside air is heated by heat exchange, and will not also
The ingredient of original flue gas by air preheater 3 and boiler air is had an impact.
In practical operation, controllable register door is equipped on first branch pipe, 10 and second branch pipe 11, it is described to be responsible on 9
Equipped with a control valve 12, the supervisor leads to 9 one end with the drying tower 7, the other end respectively with first branch pipe 10 and
Two branch pipes 11 lead to.Realize gaseous mixture at sub-control by controlling the controllable register door on the first branch pipe 10 and the second branch pipe 11 respectively
System can cause the case where gluing wall in drying tower 7 to occur since the high-ash flue gas of high temperature is used alone, but when outside air inputs
When excessive, smoke components can be changed, and then the working efficiency for influencing the equipment on the way of flue main pipe 1 passes through control so in control
Controllable register door processed adjusts the ingredient of gaseous mixture, when occurring wall sticking phenomenon in equipment, passes through the content for improving outside air
It mixture temperature and ash content is reduced, alleviation is played the role of and eliminates wall sticking phenomenon, when not occurring wall sticking phenomenon in equipment
When, pass through the influence for improving the content of flue gas to reduce because of input outside air to flue main pipe 1 on the way equipment.
In practical operation, 7 top of the drying tower is equipped with a scroll casing type air distributor 13 led to the supervisor 9
And the centrifugal type atomizer 14 that leads to the Wastewater Pretreatment pipeline, 7 lower part of the drying tower is equipped with solid discharge mouth
15.When in use, the desulfurization wastewater in Wastewater Pretreatment device is sent into the centrifugal type atomizer 14 by feed pump 19, it is described from
Desulfurization wastewater is atomized into the droplet that grain size is less than 60 microns by core type atomizer 14, it is ensured that desulfurization wastewater is rapid in drying tower 7
Dry, desulfurization wastewater is atomized to form the droplet that grain size is 20 microns by preferred embodiment, the centrifugal type atomizer 14, also may be used certainly
To adjust atomizing particle size according to actual conditions, to meet the needs of the normal work of drying tower 7, it is regarded as the specific of the present invention
Embodiment.In addition, the treating capacity of desulfurization wastewater should be adjusted according to mixture temperature variation caused by unit load, with reduction pair
The influence that unit runs well.The feed pump 19 preferably uses high-pressure pump.
In practical operation, the Wastewater Pretreatment pipeline includes three headers 16, preliminary sedimentation device 17, the inspissator contacted successively
18 and feed pump 19 desulfurization wastewater pipe, desulfurization wastewater pipe one end leads to the desulfurizing tower 6, the other end with it is described from
Core type atomizer 14 leads to.
Claims (9)
1. a kind of hybrid flue gas is evaporated desulfurization wastewater device, including one and boiler flue main pipe（1）The desulfurizer of cooperation, institute
State flue main pipe（1）Including the scr reactor being sequentially connected in series（2）, air preheater（3）, the first fume afterheat
Recover（4）, electric precipitator（5）, desulfurizing tower（6）, the second flue gas waste heat recoverer and chimney, it is characterised in that the desulfurization
Device is evaporated desulfurization portion and the quenched desulfurization portion of a gas including a gaseous mixture, and it includes a drying tower that the gaseous mixture, which is evaporated desulfurization portion,
（7）And the desulfurizing tower（6）The Wastewater Pretreatment pipeline and a mixed gas pipeline led to, the drying tower（7）Pass through one
Offgas duct（8）With the flue main pipe（1）Lead to, the gaseous mixture pipeline includes and a drying tower（7）The supervisor led to
（9）, connection be located at the scr reactor（2）With air preheater（3）Between flue main pipe（1）The first branch pipe
（10）And leads to outside air and flow through the air preheater（3）The second branch pipe（11）, the external world of flue gas and heating
Air is mixed and fed into drying tower（7）Desulfurization wastewater is carried out to be evaporated processing.
2. a kind of hybrid flue gas according to claim 1 is evaporated desulfurization wastewater device, it is characterised in that described first
Pipe（10）With the second branch pipe（11）On be equipped with controllable register door, the supervisor（9）It is equipped with a control valve（12）, the supervisor
（9）One end and the drying tower（7）Lead to, the other end respectively with first branch pipe（10）With the second branch pipe（11）Lead to.
3. a kind of hybrid flue gas according to claim 2 is evaporated desulfurization wastewater device, it is characterised in that the drying tower
（7）Top is equipped with one and the supervisor（9）The scroll casing type air distributor led to（13）And one with the Wastewater Pretreatment pipe
The centrifugal type atomizer that road is led to（14）, the drying tower（7）Lower part is equipped with solid discharge mouth（15）.
4. a kind of hybrid flue gas according to claim 1 is evaporated desulfurization wastewater device, it is characterised in that the offgas duct
（8）One end and the drying tower（7）Middle part is led to, and the other end is connected to positioned at first flue gas waste heat recoverer（4）And electricity
Deduster（5）Between flue main pipe（1）On.
5. a kind of hybrid flue gas according to claim 3 is evaporated desulfurization wastewater device, it is characterised in that the waste water is pre-
It includes three headers contacted successively to handle pipeline（16）, preliminary sedimentation device（17）, inspissator（18）And feed pump（19）Desulfurization it is useless
Water pipe, desulfurization wastewater pipe one end and the desulfurizing tower（6）Lead to, the other end and centrifugal type atomizer（14）Lead to.
6. being evaporated desulfurization wastewater device according to a kind of any hybrid flue gases of claim 1-5, it is characterised in that described
The quenched desulfurization portion of gas includes a lye reserve tank（20）And one band infusion pump（21）Alkali lye pipeline, the alkali lye pipeline one
End and the lye reserve tank（20）Lead to, the other end is connected to positioned at the air preheater（3）More than first flue gas
Heat regenerator（4）Between flue main pipe（1）On.
7. a kind of hybrid flue gas using claim 1 described device is evaporated desulfurization wastewater method, it is characterised in that outside boiler
Desulfuration operations are realized by the following method in the flue gas of row：First, flue main pipe（1）Interior flue gas and pass through the quenched desulfurization portion of gas
Spray into flue main pipe（1）Misty alkaline reaction form solid particle, solid particle passes through electric precipitator（5）Outer row realizes cigarette
Gas sulfur content reduces；Secondly, flue gas passes through desulfurizing tower（6）Formed desulfurization wastewater, desulfurization wastewater by Wastewater Pretreatment pipeline according to
It is secondary to be settled, enrichment process and pass through centrifugal type atomizer（14）Spray into drying tower（7）, at the same time, drying tower（7）Pass through
Gaseous mixture pipeline obtain evaporation desulfurization wastewater high-temperature mixed gas, the mixed gas include preheating outside air and from
Flue main pipe（1）The bypass flue gas of introducing；Finally, mixed gas and the desulfurization wastewater of atomization are in drying tower（7）Middle contact, desulfurization
Moisture evaporation in waste water forms vapor, forms sulfur-containing solid particle after desulfurization wastewater dehydration, carries the gaseous mixture of vapor secretly
Body passes through offgas duct（8）Import flue main pipe（1）In, solid particle drops to drying tower（7）Bottom and by outer row.
8. a kind of hybrid flue gas according to claim 7 is evaporated desulfurization wastewater method, it is characterised in that the bypass cigarette
Gas is quoted from the flue main pipe（1）Positioned at the first flue gas waste heat recoverer（4）Section before, the outside air pass through described
Air preheater（3）Preheating procedure is completed, outside air passes through scroll casing type air distributor with flue gas（13）Uniformly mixing, it is described
The mixed proportion between flue gas and outside air is bypassed by setting up separately in the first branch pipe（10）With the second branch pipe（11）On adjusting gear
Plate gate system.
9. a kind of hybrid flue gas according to claim 7 is evaporated desulfurization wastewater method, it is characterised in that the offgas duct
（8）The mixed gas for carrying vapor secretly is sent into the flue main pipe（1）Positioned at the first flue gas waste heat recoverer（4）With electric precipitation
Device（5）Between section, utilize electric precipitator（5）Come drying tower outside（7）Middle formation and the solid particle arranged outside with mixed flue gas.
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| US10267517B2 (en) * | 2016-07-08 | 2019-04-23 | Arvos Ljungstrom Llc | Method and system for improving boiler effectiveness |
| WO2018028425A1 (en) * | 2016-08-08 | 2018-02-15 | 浙江大学 | Desulphurization wastewater zero-discharge system for removing fluorine and chlorine from coal-fired flue gas by semi-dry process |
| CN106512456B (en) * | 2016-10-14 | 2018-12-28 | 北京姚魏环保技术有限公司 | A kind of four sections of method vaporising devices and method of desulfurization wastewater |
| CN106477794B (en) * | 2016-11-16 | 2019-04-30 | 重庆大学 | The System and method for of desulfurization wastewater concentration and flue gas drying integrated treatment |
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| CN107562102B (en) * | 2017-03-31 | 2022-09-06 | 浙江浙能长兴发电有限公司 | Desulfurization wastewater device control method and system based on energy balance |
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| CN109111009A (en) * | 2018-09-30 | 2019-01-01 | 杭州天蓝净环保科技有限公司 | A kind of desulfurization wastewater technique of zero discharge and device |
| CN112524984A (en) * | 2020-11-30 | 2021-03-19 | 中国海洋大学 | System for refrigerating and desulfurizing wastewater by using coal cinder waste heat |
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