CN108096989A - A kind of flue gas purifying method and device including flue gas temperature control - Google Patents

A kind of flue gas purifying method and device including flue gas temperature control Download PDF

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Publication number
CN108096989A
CN108096989A CN201810135593.0A CN201810135593A CN108096989A CN 108096989 A CN108096989 A CN 108096989A CN 201810135593 A CN201810135593 A CN 201810135593A CN 108096989 A CN108096989 A CN 108096989A
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flue
gas
flue gas
temperature
conveying duct
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CN108096989B (en
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魏进超
叶恒棣
杨本涛
李勇
刘昌齐
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Zhongye Changtian International Engineering Co Ltd
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Zhongye Changtian International Engineering Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/30—Technologies for a more efficient combustion or heat usage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Treating Waste Gases (AREA)

Abstract

A kind of flue gas purifying method for including flue gas temperature control, this method comprise the following steps：1) former smoke conveying duct separates bypass flue；2) 1. waste water is sprayed into bypass flue by atomizer, and waste water forms flue gas and waste water mixed gas with carrying out heat exchange into the flue gas of bypass flue；2. separating the downstream of bypass flue position in former smoke conveying duct, cold air is passed through into former smoke conveying duct to adjust the temperature of flue gas；3. the flue gas and waste water mixed gas in bypass flue are mixed in former smoke conveying duct by the flue gas after cold air temperature control, into adsorption tower；Flue-gas temperature at adsorption column inlet is conditioned within the limits prescribed；3) mixed flue gas enters activated carbon adsorber, by adsorption tower activated carbon adsorption, discharge after purification, adsorbed the activated carbon of pollutant in flue gas from absorption tower bottom discharge.The present invention not only can guarantee that waste water was rationally disposed, but also can realize being precisely controlled for smoke temperature.

Description

A kind of flue gas purifying method and device including flue gas temperature control
Technical field
The present invention relates to the flue gases purification using activated carbon adsorber, it is more particularly related to a kind of bag The flue gas purifying method and device of flue gas temperature control are included, belongs to sintering fume treatment field.
Background technology
For industrial smoke, the especially sintering device flue gas of steel and iron industry, using including activated carbon adsorber and parsing Large-scale dry desulfurization, denitrification apparatus and the technique of tower are more satisfactory.Activated carbon flue gases purification has and can take off simultaneously By-product resource, the features such as adsorbent can be recycled, denitrification efficiency is high, are realized in sulphur denitration, and right and wrong are often with there is development The desulfurization and denitrification integral technology of prospect.In the desulphurization and denitration device including activated carbon adsorber and Analytic Tower (or regenerator) In, activated carbon adsorber is used to include sulphur from sintering flue gas or exhaust gas (the especially sintering flue gas of the sintering machine of steel and iron industry) absorption Oxide, nitrogen oxides He pollutant including bioxin, and Analytic Tower is used for the hot recycling of activated carbon.
However, activated carbon method flue gases purification is more demanding for the control of former flue-gas temperature, former flue gas is through booster fan Temperature is often at 150 DEG C or more (by taking the steel 1# sintering machines of Zhanjiang as an example, without the adsorption column inlet flue gas temperature of cooling processing afterwards Degree can reach 150-180 DEG C), former flue-gas temperature is higher, the easier generation high temperature of activated carbon.In general, activated carbon adsorber The normal temperature of interior active carbon bed is 100-160 DEG C, is preferably controlled in 110-150 DEG C.
On the one hand, the activated carbon burning in bed in order to prevent, it is stringent control active carbon bed temperature less than 165 DEG C, it is excellent Choosing is less than 160 DEG C.This is because although the burning point of activated carbon at 430 DEG C or so, occurs chemical anti-in activated carbon surface Exothermic reaction should be generally, and containing a small amount of inflammable, combustion-supporting material in the dust in flue gas, and also entrainment is easy in itself for activated carbon Combustion property dust.If without strictly controlling the temperature in adsorption tower, the presence of these flammable materials or inflammability dust with Shi Zaocheng security risks gently may then cause activated carbon spontaneous combustion in tens meters of high adsorption towers, seriously then cause dust explosion, this The appearance of two kinds of accidents is all catastrophic for large-scale desulphurization denitration tower apparatus.So for the sake of security, generally It is 165 DEG C to set active carbon bed temperature alarming temperature.The former flue gas temperature after booster fan pressurizes of sintering be generally 90 DEG C- Between 200 DEG C, preferably 100-180 DEG C, and oxygen content height in flue gas is sintered, bed temperature after activated carbon surface oxidation in tower 5-15 DEG C can be higher by than input gas temperature, thus in order to ensure desulfuring and denitrifying apparatus safe operation, it is necessary to into adsorbing The flue-gas temperature of tower is controlled, general to set alarm temperature as 145 DEG C.In addition, before adsorption tower is stopped transport, activity in tower must be kept Charcoal bed temperature is less than 90 DEG C, needs to cool down active carbon bed at this time, therefore in order to ensure stopping transport safely, it also must be right Active carbon bed temperature is controlled.
On the other hand, stringent control is needed during activated carbon flue gas purification system normal operation into the flue-gas temperature of adsorption tower Be higher than or not less than 100 DEG C, preferably above or not less than 110 DEG C.This is because if flue-gas temperature is less than 100 DEG C, enter The temperature of contained water vapour easily becomes water and is aoxidized with sulphur close to dew point (or set point) in sintering flue gas in bed Object reacts the acid for becoming severe corrosive, causes the heavy corrosion of device and seriously reduces the effect of desulphurization and denitration.
Traditional flue gas cool-down method is that direct atomized water spray realizes flue gas cool-down into flue gas.This cooling means then cannot Using waste water (such as waste water that washing system generates in activated carbon method) as water source, because harmful element can be in system in waste water Internal circulation collection, etching system equipment.
The content of the invention
In view of the above shortcomings of the prior art, it is an object of the invention to provide a kind of gas cleanings for including flue gas temperature control Method and apparatus.The present invention separates bypass flue on the basis of existing technology, using former smoke conveying duct, bypasses cigarette Gas blowout enters waste water cooling, additional to carry out dedusting to waste water, not only can guarantee that waste water was rationally disposed, but also can realize that smoke temperature is precisely controlled System.
According to the first embodiment of the present invention, a kind of flue gas purifying method for including flue gas temperature control is provided：
A kind of flue gas purifying method for including flue gas temperature control, this method comprise the following steps：
1) separate bypass flue to the former smoke conveying duct of activated carbon adsorber conveying high-temperature flue gas, flue gas via Former smoke conveying duct and bypass flue enter adsorption tower；
2) the step of flue gas temperature control or the step of flue gas temperature adjustment, which includes following sub-step：
1. bypass the flue gas temperature control of flue：It bypasses flue and is equipped with atomizer, waste water is atomized by atomizer Then with the flue gas mixing in bypass flue, the flue gas that waste water bypasses flue with entering carries out heat exchange, forms cigarette Gas and waste water mixed gas；Preferably, flue gas and waste water mixed gas pass through deduster dedusting, flue gas and waste water mixed gas In impurity discharged from the solid outlet of deduster；
2. the flue gas temperature control of former smoke conveying duct：It is separated in former smoke conveying duct under bypass flue position Trip, cold air is passed through into former smoke conveying duct to adjust the temperature of flue gas in former smoke conveying duct；
3. the flue gas and waste water mixed gas in bypass flue are incorporated into former smoke conveying duct, conveyed with former flue gas It is mixed in pipeline by the flue gas after cold air temperature control or temperature adjustment, into adsorption tower；Flue-gas temperature at adsorption column inlet is adjusted Section is within the limits prescribed；
3) mixed flue gas enters activated carbon adsorber, by adsorption tower activated carbon adsorption, purification after discharge, adsorb The activated carbon of pollutant is from absorption tower bottom discharge in flue gas.
Wherein, sub-step 1. in, the flue gas and waste water mixed gas refer to, waste water with into bypass flue in Flue gas carry out heat exchange when, waste water evaporation becomes vaporous water, the vaporous water after evaporation is mixed with flue gas, as flue gas and waste water Mixed gas.
Preferably, the sub-step of the above method 1. in, the waste water enters mist by wastewater storage tank along waste water input channel Change device.It is preferred that the waste water in wastewater storage tank is neutral or alkalescence.Preferably, waste water input channel is equipped with waste water pump, waste water It pumps and enters atomizer for waste water power is provided.
Preferably, the sub-step of the above method 2. in, the cold air is delivered to former flue gas delivery pipe by air pipeline Road.
Preferably, in the step 2) of the above method, the upper of bypass flue position is separated in former smoke conveying duct Trip sets the first temperature measuring point.Former smoke conveying duct be passed through cold air position and bypass flue to be incorporated into former flue gas defeated It send and the second temperature measuring point is set between the position of pipeline.The 3rd thermometric is set on bypass flue and positioned at deduster downstream Point.On former smoke conveying duct, bypass the 4th thermometric of downstream setting that flue is incorporated into former smoke conveying duct position Point.Flue-gas temperature T1 in first temperature measuring point on-line checking corresponding position flue.Second temperature measuring point on-line checking correspondence position Locate the flue-gas temperature T2 in flue.Flue-gas temperature T3 in 3rd temperature measuring point on-line checking corresponding position flue.4th thermometric Flue-gas temperature T4 in the flue of point on-line checking corresponding position.Wherein it is in the temperature target or setting value of the 4th temperature measuring point T4If。
The heat Q discharged according to the flue gas into bypass flueCigarette 1Waste water with spraying into bypass flue is inhaled The heat Q of receiptsWaterIt is equal, it calculates and adjusts the sub-step 1. middle amount into the flue gas for bypassing flue.Further basis passes through The heat Q that the flue gas that former smoke conveying duct enters adsorption tower is dischargedCigarette 2Cold air with being passed through former smoke conveying duct is inhaled The heat Q of receiptsGasIt is equal, it calculates and the amount of the cold air of former smoke conveying duct is passed through in adjusting sub-step 2..By adjust into Enter to bypass the amount of the flue gas of flue, the amount for the cold air for being passed through former smoke conveying duct so that the temperature of the 4th temperature measuring point T4 is adjusted or controlled in T4If± t DEG C scope, wherein t DEG C is in 1-5 DEG C of scope.
Preferably, wherein in the temperature target of the 4th temperature measuring point or setting value T4If100-145 DEG C, preferably exist Value in the range of 110-140 DEG C；Flue-gas temperature i.e. at adsorption column inlet is conditioned within the limits prescribed, such as in 100- 145 DEG C, preferably in 110-140 DEG C of scope.
Preferably, the heat Q discharged according to the flue gas into bypass flueCigarette 1Flue gas is bypassed with spraying into The heat Q that the waste water of pipeline is absorbedWaterIt is equal, it calculates and adjusts the sub-step 1. middle amount into the flue gas for bypassing flue, Specially：
The temperature of the former flue gas of first temperature measuring point detection is T1, sets flue gas and waste water mixed gas at the 3rd temperature measuring point position Temperature be T3If, wherein：T3IfFor 100-160 DEG C, the preferred value in the range of 110-140 DEG C；
A) calculating processing waste water institute calorific requirement：Liquid level gauge is equipped in wastewater storage tank, is obtained according to liquid level gauge in wastewater storage tank Wastewater flow rate to be treated is MWater, the initial temperature for detecting waste water is TWater, suction required for the waste water in wastewater storage tank is handled as a result, The heat Q of receiptsWaterFor：
QWater=MWaterrWater+CSteamMWaterΔTWater=MWater(rWater+CSteam(T3If-TWater)) (1),
R in formula (1)WaterFor the heat of vaporization of waste water, CSteamFor the specific heat capacity of steam；
B) exhaust gas volumn needed for bypass flue is calculated：If the amount into the flue gas of bypass flue is M1, as a result, The heat Q discharged into the flue gas of bypass flueCigarette 1For：
QCigarette 1=CCigaretteM1ΔTCigarette 1=CCigaretteM1(T1-T3If) (2),
C in formula (2)CigaretteFor the specific heat capacity of flue gas；
By the heat Q discharged into the flue gas of bypass flueCigarette 1Waste water with spraying into bypass flue is absorbed Heat QWaterIt is equal, it can obtain：
CCigaretteM1(T1-T3If)=MWater(rWater+CSteam(T3If-TWater)) (3),
To obtain the final product：
M1=MWater(rWater+CSteam(T3If-TWater))/(CCigarette(T1-T3If)) (4)；
Adjust the aperture of bypass valve on bypass flue so that the amount into the flue gas of bypass flue is M1。
In the present invention, flue gas and the flue gas and waste water gaseous mixture after waste water heat exchange can be generally set as the case may be The temperature T3 of bodyIf.For example, it is contemplated that trying one's best the atomizer of the 3rd temperature measuring point upstream and the load of deduster is allowed to be dropped to most with abrasion It is low, it is normally set up T3IfFor T4IfMarginal value, such as T3If=105 DEG C.
In addition, waste water carries out heat exchange, waste water evaporation endothermic with flue gas, water evaporation absorbs heat and is generally divided into two parts meter It calculates, a part is that initial temperature is TWaterWaste water be evaporated to temperature as TWaterSteam, recept the caloric as MWaterrWater, another part is temperature For TWaterSteam be heated to be temperature for T3IfSteam, recept the caloric as CSteamMWaterΔTWater。
Preferably, it is described further to enter the heat that the flue gas of adsorption tower discharged according to by former smoke conveying duct QCigarette 2The heat Q that cold air with being passed through former smoke conveying duct is absorbedGasIt is equal, it calculates and is passed through original in adjusting sub-step 2. The amount of the cold air of smoke conveying duct, specially：
The total amount that the flow measurement of first temperature measuring point upstream obtains flue gas is M0, the temperature of the former flue gas of the first temperature measuring point detection is T1 sets at the second temperature measuring point position the temperature of flue gas and cold air mixed gas as T2If, wherein：T2IfFor 100-160 DEG C, it is excellent It is selected in value in the range of 110-140 DEG C；
A) heat that former smoke conveying duct Central Plains flue gas needs discharge is calculated：Absorption is entered by former smoke conveying duct The amount of the flue gas of tower is (M0-M1), the heat Q that the flue gas of adsorption tower discharged is entered by former smoke conveying ductCigarette 2For：
QCigarette 2=CCigarette(M0-M1)ΔTCigarette 2=CCigarette(M0-M1)(T1-T2If) (5),
B) amount for the cold air for being passed through former smoke conveying duct is calculated：If it is passed through the amount of the cold air of former smoke conveying duct For MGas, the initial temperature for measuring cold air is TGas, the heat Q that the cold air of former smoke conveying duct is absorbed is passed through as a result,Gas For：
QGas=CGasMGasΔTGas=CGasMGas(T2If-TGas) (6),
C in formula (6)GasFor the specific heat capacity of cold air；
The heat Q discharged by the flue gas for entering adsorption tower by former smoke conveying ductCigarette 2With being passed through former flue gas delivery pipe The heat Q that the cold air in road is absorbedGasIt is equal, it can obtain：
CCigarette(M0-M1)(T1-T2If)=CGasMGas(T2If-TGas) (7)；
To obtain the final product：
MGas=CCigarette(M0-M1)(T1-T2If)/(CGas(T2If-TGas)) (8)；
Adjust the aperture of cold blast sliding valve on air pipeline so that the amount for being passed through the cold air of former smoke conveying duct is MGas。
Preferably, it is described by adjusting the amount into the flue gas for bypassing flue, being passed through former smoke conveying duct The amount of cold air so that the temperature T4 of the 4th temperature measuring point is adjusted or controlled in T4If± t DEG C scope, specially：
Bypass flue gas in flue and waste water mixed gas in former smoke conveying duct by cold air temperature control or Flue gas and the mixing of cold air mixed gas after temperature adjustment, after heat exchange occurs for two-way gas, the temperature T4 of the 4th temperature measuring point (P4) It adjusts or controls in T4If± t DEG C scope.Flue gas and waste water mixed gas in bypass flue absorb the heat of (or release) Measure QCigarette+waterThe heat Q of (or absorption) is discharged with the flue gas in former smoke conveying duct and cold air mixed gasCigarette+gasIt is equal, i.e.,：
QCigarette+water=QCigarette+gas(9),
I.e.：C1(M1+MWater)(T4If-T3If)=C2(M0-M1+MGas)(T2If-T4If) (10),
C in formula (10)1For flue gas and the specific heat capacity of waste water mixed gas；C2For flue gas and the specific heat of cold air mixed gas Hold.
Preferably, T2If=T3If=T4If。
In the present invention, in order to make bypass flue and the mixed flue gas of two-way flue gas in former smoke conveying duct Temperature (i.e. flue-gas temperature T4 in the 4th temperature measuring point corresponding position flue) is easier to control in T4If± t DEG C scope, by two-way Flue-gas temperature setting or control before flue gas mixing are T4If, i.e. T3If=T4If, T2If=T4If。
Preferably, according to the flue-gas temperature T2 in the second temperature measuring point on-line checking corresponding position flue.If T2 etc. In T2If, continue to run with；T2 is not equal to T2If, adjustment be passed through former smoke conveying duct cold air amount so that T2 be equal to T2If。
T2 is more than T2IfWhen, the aperture of cold blast sliding valve on air pipeline is tuned up, the cold of former smoke conveying duct is passed through so as to increase The amount of air so that T2 is equal to T2If；T2 is less than T2IfWhen, it turns the aperture of cold blast sliding valve on air pipeline down, original is passed through so as to reduce The amount of the cold air of smoke conveying duct so that T2 is equal to T2If。
According to the flue-gas temperature T3 in the 3rd temperature measuring point on-line checking corresponding position flue.If T3 is equal to T3If, continue Operation；T3 is not equal to T3If, be adjusted into bypass flue flue gas amount so that T3 be equal to T3If。
T3 is more than T3IfWhen, it turns the aperture of bypass valve on bypass flue down, enters bypass flue so as to reduce The amount of flue gas so that T3 is equal to T3If；T3 is less than T3IfWhen, tune up bypass flue on bypass valve aperture, so as to increase into Enter to bypass the amount of the flue gas of flue so that T3 is equal to T3If。
According to the flue-gas temperature T4 in the 4th temperature measuring point on-line checking corresponding position flue.If T4 is equal to T4If, continue Operation；T4 is not equal to T4If, adjust the amount for the cold air for being passed through former smoke conveying duct and enter the flue gas of bypass flue Amount so that T4 is equal to T4If。
T4 is more than T4IfWhen, the aperture of cold blast sliding valve on air pipeline is tuned up, the cold of former smoke conveying duct is passed through so as to increase The amount of air, while turn the aperture of bypass valve on bypass flue down, so as to reduce into the flue gas of bypass flue Amount so that T4 is equal to T4If；T4 is less than T4IfWhen, turn the aperture of cold blast sliding valve on air pipeline down, to be passed through former flue gas defeated so as to reduce The amount of the cold air of pipeline is sent, while tunes up the aperture of bypass valve on bypass flue, so as to increase into bypass fume pipe The amount of the flue gas in road so that T4 is equal to T4If。
Preferably, in the step 3) of the above method, by adsorption tower activated carbon adsorption, purified flue gas pass through cigarette Chimney discharges.
Second of embodiment according to the present invention provides a kind of smoke eliminator for including flue gas temperature control：
A kind of smoke eliminator including flue gas temperature control or the smoke eliminator for the above method, the device include Adsorption tower, adsorption tower are equipped with adsorption tower smoke inlet.Adsorption tower smoke inlet is connected with former smoke conveying duct.Former flue gas is defeated Pipeline is sent to separate bypass flue.It bypasses and is equipped with atomizer, deduster on flue successively.Atomizer enters equipped with flue gas Mouth, exhanst gas outlet, waterwater entrance.Deduster is equipped with gas access, gas vent, solid outlet.Flue is bypassed to pass through Former smoke conveying duct is incorporated into after atomizer, deduster.Atomizer is arranged on the upstream of deduster.
Former smoke conveying duct is equipped with the first booster fan.First booster fan is arranged on bypass flue and is incorporated into The downstream of former smoke conveying duct position.
Air pipeline is connected on former smoke conveying duct.Air pipeline is connected to former smoke conveying duct and separates bypass cigarette The position of feed channel and bypass flue are incorporated between the position of former smoke conveying duct.
Preferably, which further includes the bypass valve being arranged on bypass flue.Bypass valve is located at atomizer Upstream.
Preferably, which further includes the cold blast sliding valve being arranged on air pipeline.In the present invention, conveyed in former flue gas The upstream that pipeline separates bypass flue position sets the first temperature measuring point.In the position of former smoke conveying duct connection air pipeline It puts and bypasses between flue is incorporated into the position of former smoke conveying duct and the second temperature measuring point is set.On bypass flue And the 3rd temperature measuring point is set positioned at deduster downstream.On former smoke conveying duct, bypass flue be incorporated into former flue gas The downstream of conveyance conduit position sets the 4th temperature measuring point.
Preferably, which further includes wastewater storage tank.Wastewater storage tank is connected to atomizer by waste water input channel Waterwater entrance.It is preferred that waste water input channel is equipped with waste water pump.Preferably, waste water temperature detection dress is equipped in wastewater storage tank It puts.
Preferably, air pipeline is equipped with air themperature detection device.
Preferably, on former smoke conveying duct, the upstream of the first temperature measuring point is equipped with flowmeter.
Preferably, bypass flue and be equipped with the second booster fan, the second booster fan is arranged under deduster Trip.
Preferably, which further includes chimney.Adsorption tower is equipped with adsorption tower exhanst gas outlet, adsorption tower exhanst gas outlet warp Chimney is connected to by former smoke conveying duct.
In the present invention, the first booster fan is arranged on former smoke conveying duct.First booster fan is arranged to cigarette Gas, which flows along flue and enters adsorption tower, provides power.The first booster fan is arranged on former smoke conveying duct as a result, On specific location do not limit, can meet and enter adsorption tower for flue gas power is provided.For example, the first booster fan can be with It is arranged on the position downstream that bypass flue is incorporated into former smoke conveying duct；Former smoke conveying duct can also be arranged on to close And the position upstream of extremely former smoke conveying duct.
In the present invention, the second booster fan is arranged on from the bypass flue that former smoke conveying duct separates.The The flue gas that is arranged to of two booster fans enters bypass flue offer power.Correspondingly, the second booster fan is arranged on bypass Specific location on flue does not limit, can meet for flue gas enter bypass flue power is provided.For example, the Two booster fans can be arranged on the downstream of atomizer；The upstream of atomizer can also be arranged on.
The flue gas purifying method for including flue gas temperature control of the present invention, first according to flue gas and waste water in bypass flue into The heat that flue gas is discharged during row heat exchange is equal with the heat that waste water is absorbed, i.e., extrapolates the corresponding waste water of processing by formula (3) In the case of amount, the amount of the required flue gas into bypass flue；Further according to flue gas and cold air in former smoke conveying duct The heat that flue gas is discharged when carrying out heat exchange is equal with the heat that cold air is absorbed, i.e., extrapolates required be passed through by formula (7) The amount of the cold air of former smoke conveying duct；Finally by the amount for adjusting the flue gas into bypass flue, it is passed through former flue gas The amount of the cold air of conveyance conduit so that the temperature T4 (flue-gas temperature i.e. at adsorption column inlet) of the 4th temperature measuring point is in target temperature Spend T4If± t DEG C scope, i.e., at 100-145 DEG C, preferably in 110-140 DEG C of scope.
In the present invention, the specific heat capacity within the scope of temperature of each substance in corresponding pipeline is as follows：
The specific heat capacity C of flue gasCigarette=1.005~1.026kJ/ (kg DEG C)；The heat of vaporization r of waste waterWater=2307.8~ 2457.7kJ/kg；The specific heat capacity C of steamSteam=1.864~1.930kJ/ (kg DEG C)；The specific heat capacity C of cold airGas=1.005 ~1.009kJ/ (kg DEG C)；The specific heat capacity C of flue gas and waste water mixed gas1=1.009~1.032kJ/ (kg DEG C)；Flue gas With the specific heat capacity C of cold air mixed gas2=1.009~1.017kJ/ (kg DEG C).
In the present invention, the downstream of atomizer sets deduster, and the harmful substance in waste water can after being converted into salts substances Whole device is discharged by deduster, so as to effectively avoid the harmful element etching system equipment in waste water, solves existing skill The problem of water source of the waste water as cooled flue gas cannot be used in art.
In the present invention, in the industries such as steel, electric power, coloured, petrochemical industry, chemical industry or building materials, due to the use of raw material type It is more, the flue gas containing multiple pollutant is often generated, flue gas includes such as SO2, NOx, dust, VOCs, the impurity such as heavy metal.It is more Pollutant flue gas passes through adsorption treatment, has adsorbed the adsorbent (such as activated carbon) of multi-pollutant by dissection process, cycling makes With；In resolving, the parsing gas of generation, parsing gas generates substantial amounts of waste water by carrying out washing treatment in washing process, solves Air-breathing body washes fails effectively to handle, serious pollution environment.The present invention utilizes former flue gas (such as former sintering flue gas) Heat handles the waste water generated in processes such as parsing, parsing gas treatments.This method has flue gas and waste water collaboration processing, fortune The advantage that capable at low cost, low equipment investment, cleaning treatment, secondary pollution effectively control, realizes wastewater zero discharge.
In the present invention, it would be desirable to which whole waste water of processing are evaporated by the waste heat of former flue gas, then dedusting, then defeated It send to adsorption tower and is handled, realize the zero-emission of waste water.Waste water is transported to former smoke conveying duct to handle, still If all former flue gases mixed with waste water, due in waste water containing metal ion, chlorion, fluorine ion, sulfate radical from The impurity such as son；Waste water can generate crystallization after being mixed with flue gas, it is necessary to can just be delivered to adsorption tower by dust removal process；Otherwise, mix The flue gas for closing such waste water will seriously affect the performance of activated carbon in adsorption tower so that adsorption effect is had a greatly reduced quality, and will seriously be made It obtains activated carbon thoroughly to inactivate, causes the waste of resource.If waste water and whole flue gases mixed, using dust-removing process, due to Exhaust gas volumn to be treated is big, this will greatly increase the work of dedusting in entire technological process, and expense increases, cleaner input Greatly, bigger is lost.
Therefore, the former smoke conveying duct for conveying high-temperature flue gas is separated bypass flue by the present invention, will be in former flue gas Part drainage into bypass flue, waste water is dried and crystallized by the flue gas bypassed in flue, then After the effluent part and the mixed flue gas of flue gas and waste water mixed gas are delivered to adsorption tower progress again by dust removal process Continuous processing.Technical scheme only needs will be for the mixed gas after the partial fume of composite waste and waste water atomization By processing, remaining does not need not move through dust removal process by the flue gas of bypass flue, this just substantially reduces dedusting Workload, it is energy saving, reduce input.
The wastewater flow rate that the present invention is handled as needed, accurate control enter the amount of flue gas in bypass flue so that into The effluent part can just be handled by entering the flue gas bypassed in flue.If the flue gas for introducing bypass flue is very few, It will so that wastewater treatment is incomplete, loses meaning of the present invention；If the flue gas for introducing bypass flue is excessive, it will cause side Flue gas is superfluous in the flue of road, the flue gas that processing waste water need not be superfluous, since the flue gas in bypass flue is both needed to lead to It crosses deduster to be handled, therefore, the workload of dedusting will excessively be increased by introducing the flue gas of bypass flue, to deduster It is required that it is also more stringent, increase input cost.The present invention introduces the exhaust gas volumn of bypass flue by accurately controlling so that The partial fume can just handle pending waste water, and will not additionally increase the workload of dedusting.It removes and introduces bypass cigarette The flue gas of feed channel, the flue gas of remainder continue through former smoke conveying duct and are fed directly to adsorption tower, wherein, the part Flue gas is cooled down by being blended into cold air so that the flue-gas temperature at adsorption column inlet is conditioned within the limits prescribed.
If the flue gas temperature for inputting adsorption tower is too low, the temperature conditionss of activated carbon removing pollutant will be not achieved so that The adsorption effect of activated carbon is poor, and the purpose of gas cleaning is not achieved；If the flue-gas temperature for inputting adsorption tower is excessively high, can cause to inhale Activated carbon in attached tower is inactivated because of high temperature, loses adsorption function.Therefore, the flue-gas temperature at adsorption column inlet is accurately controlled It is most important.The present invention is by accurately controlling the flue-gas temperature of bypass flue and the temperature of the flue gas of former smoke conveying duct Degree, the temperature ensured into flue gas in adsorption tower are adjusted in suitable scope.
In the present invention, the former smoke conveying duct for conveying high-temperature flue gas separates bypass flue, and flue gas is via former cigarette Letter shoot road and bypass flue enter adsorption tower.Waste water is mixed by bypassing flue with the flue gas in the pipeline, So that waste water is mixed with flue gas, flue gas and waste water mixed gas are formed；Achieve the purpose that handle waste water.Due to containing gold in waste water Belong to the substances such as ion, chlorion, fluorine ion, sulfate ion, after waste water is transported to bypass flue, can utilize and bypass cigarette Flue gas in feed channel is dried so that the ion in waste water forms crystal salt；Such as villaumite, villiaumite, sulfate etc.；Mixing In flue gas and waste water mixed gas afterwards, due to containing ion in waste water before, after forming crystal salt, by dust removal process, Crystal salt is discharged from the solid outlet of deduster；Crystal salt is recycled, can sell or as other purposes, generate economic valency Value.Therefore, technical scheme has handled the waste water containing impurity, and can recycle by-product crystal salt, generates warp Ji value；In addition, the waste water for spraying into bypass flue also acts the effect adjusted into flue-gas temperature in adsorption tower so that Into the flue gas control in adsorption tower within the temperature range of suitable activated carbon adsorption processing.Flue gas in former smoke conveying duct It is adjusted by being blended into cold wind into trip temperature, the flue gas control met into adsorption tower is being suitble to the temperature of activated carbon adsorption processing In the range of.
In the present invention, the wastewater flow rate that handles as needed, the temperature into the flue gas in adsorption tower, calculating processing waste water Institute's calorific requirement.The heat needed for waste water is handled to be provided by the flue gas in bypass flue, it, can be with according to the temperature of raw flue gas It is accurate to calculate into the exhaust gas volumn in bypass flue；So as to by adjusting and controlling so that into bypass flue Exhaust gas volumn can just handle waste water completely, and there is no superfluous situation, so as to will not additionally increase the negative of dust removal process Lotus；In addition, by accurately controlling, it can also be ensured that the temperature control into the flue gas in adsorption tower is being suitble at activated carbon adsorption Within the temperature range of reason.
In the present invention, former flue gas is divided into two parts, and a part is used to handle waste water by above-mentioned bypass flue； Another part is delivered to adsorption tower by former smoke conveying duct.The flue gas conveyed by former smoke conveying duct, due to needing The temperature into the flue gas in adsorption tower is controlled, which is adjusted by being blended into cold wind into trip temperature.The skill of the present invention Art scheme, can be according to the exhaust gas volumn in the temperature of former flue gas, the pipeline, the temperature into the flue gas in adsorption tower, and calculating should The heat that partial fume needs discharge.The heat of the release is handled by the cold wind being blended into, according to the temperature of cold wind, so as to To accurately calculate the cold blast rate for needing to be blended into, ensure that the temperature of the flue gas into adsorption tower is controlled in suitable activated carbon adsorption Within the temperature range of processing.If it is excessive to be blended into cold wind so that the temperature into the flue gas of adsorption tower is too low, influences absorption effect Fruit；If the cold wind being blended into is very few so that the temperature into the flue gas of adsorption tower is excessively high, can cause activated carbon in adsorption tower because It is inactivated for high temperature or even loses adsorption function.Therefore, the cold blast rate being blended into needs accurate control, just can guarantee subsequent technique Stabilization, efficiently and smooth.
In the present invention, the waste water that can be handled as needed number, adapt to adjust into bypass flue in Exhaust gas volumn.Meanwhile it can adapt to adjust the cold blast rate being blended into and enter bypass flue gas according to the temperature of the flue gas into adsorption tower Exhaust gas volumn in pipeline.
In the present invention, flue gas and waste water mixed gas after waste water in bypass flue and flue gas being mixed Temperature be set as the temperature into the flue gas requirement of adsorption tower, in former smoke conveying duct after flue gas and cold air mixing The temperature of flue gas and cold air mixed gas is also set to the temperature into the flue gas requirement of adsorption tower, the two-way gas mixing Afterwards, it is temperature-resistant, adsorption tower is delivered to, so as to ensure that the temperature control for entering the flue gas in adsorption tower is inhaled in suitable activated carbon Within the temperature range of attached processing.Can also be：Flue gas and waste water after waste water and flue gas mix in setting bypass flue The temperature of mixed gas is less than the temperature into the flue gas requirement of adsorption tower, sets flue gas and cold air in former smoke conveying duct The temperature of flue gas and cold air mixed gas after mixing is higher than the temperature into the flue gas requirement of adsorption tower, further according to two-way Exhaust gas volumn in flue is calculated by formula (10), after the flue gas mixing in the two-way flue, is ensured into adsorption tower The temperature control of interior flue gas is within the temperature range of suitable activated carbon adsorption processing.It can also be：Setting bypass flue The temperature of flue gas and waste water mixed gas after interior waste water and flue gas mixing is higher than the temperature into the flue gas requirement of adsorption tower, The temperature of flue gas and cold air mixed gas after flue gas and cold air mix in the former smoke conveying duct of setting, which is less than, to be entered The temperature of the flue gas requirement of adsorption tower, further according to the exhaust gas volumn in two-way flue, is calculated, the two-way flue gas by formula (10) After flue gas mixing in pipeline, ensure that the temperature control of the flue gas into adsorption tower is being suitble to the temperature of activated carbon adsorption processing In the range of.In addition, in technical scheme, on the premise of it can handle waste water completely, according in bypass flue Exhaust gas volumn and former smoke conveying duct in exhaust gas volumn, adjust T2IfAnd T3IfTemperature value, after ensureing the mixing of two-way flue gas, into Enter the temperature control of the flue gas in adsorption tower within the temperature range of suitable activated carbon adsorption processing, i.e. T4 is adjusted or controlled T4If± t DEG C scope.
In the present invention, T2 is higher than according to the flue-gas temperature T2 in the second temperature measuring point on-line checking corresponding position flueIf, Increase is passed through the amount of the cold air of former smoke conveying duct；If T2 is less than T2If, reduce the cold sky for being passed through former smoke conveying duct The amount of gas.T3 is higher than according to the flue-gas temperature T3 in the 3rd temperature measuring point on-line checking corresponding position flueIf, reduce into bypass The amount of the flue gas of flue；If T3 is less than T3If, increase the amount into the flue gas for bypassing flue.According to the 4th thermometric Flue-gas temperature T4 in the flue of point on-line checking corresponding position is higher than T4If, increase the cold air for being passed through former smoke conveying duct Amount and/or, on the premise of it can handle waste water completely, reduce into bypass flue flue gas amount；If T4 is low In T4If, reduce be passed through former smoke conveying duct cold air amount and/or, on the premise of it can handle waste water completely, fit When increase enters the amount of the flue gas of bypass flue.
In the present invention, the amount of waste water is handled as needed, calculates the amount of the flue gas into bypass flue.In reality In the operating procedure of border, often bypass flue flue gas and waste water synchronous transport to bypassing flue；According to waste water Amount and into bypass flue flue gas amount, adjust input bypass flue in waste water rate and into bypass flue gas The rate of the flue gas of pipeline so that the flue gas into bypass flue can just handle waste water completely, realize the zero of waste water Discharge.The rate of waste water is controlled by waste water pump in input bypass flue.Into the rate of the flue gas of bypass flue It is controlled by bypass valve.
In this application, " upstream ", " downstream " are the direction settings according to flow of flue gas in pipeline." bottom " is basis The short transverse setting of device.
Compared with prior art, the invention has the advantages that：
1st, methods and apparatus of the present invention separates bypass flue using former smoke conveying duct, and waste water is all sprayed Enter to bypass in flue, cool down to bypass flue gas, while dedusting is carried out to waste water, be usually difficult to handle so as to ensure that Waste water rationally disposed, and can realize flue-gas temperature control；
2nd, in the present invention, the flue gas bypassed in flue is cooled down by spraying into waste water, in former smoke conveying duct Flue gas cooled down by being passed through cold air, respectively cool down after two-way flue gas mixing, according to low in heat exchanging process several times The heat that warm substance is absorbed is equal with high temperature substance institute liberated heat, and final realize is precisely controlled flue-gas temperature；
3rd, flue gas self-temperature is higher, after must often being cooled down by way of filling into large quantity of air at ability purification Reason, the present invention spray into waste water to bypass flue gas and cool down, and using fume afterheat evaporating waste water, reduce energy waste；But also Waste water is rationally disposed, and reduces the cost input of wastewater treatment；It reduces simultaneously and fills into air capacity, reduce smoke eliminator Operating cost；
4th, the method for the present invention and device are easy to operate, need not put into complicated pipe-line equipment and reaction unit, entire to fill Put stable, input cost is low.
Description of the drawings
Fig. 1 is the process flow chart of flue gas cool-down in the prior art；
Fig. 2 is the process flow chart for the flue gas purifying method that the present invention includes flue gas temperature control；
Fig. 3 is the schematic diagram for the smoke eliminator that the present invention includes flue gas temperature control.
Reference numeral：1：Adsorption tower；101：Adsorption tower smoke inlet；102：Adsorption tower exhanst gas outlet；2：Atomizer；201： Smoke inlet；202：Exhanst gas outlet；203：Waterwater entrance；3：Deduster；301：Gas access；302：Gas vent；303：Gu Body exports；4：Wastewater storage tank；5：Waste water pump；6：Bypass valve；7：Flowmeter；8：Cold blast sliding valve；9：Chimney；10：First booster fan； 11：Waste water temperature detection device；12：Air themperature detection device；13：Second booster fan；
L1：Former smoke conveying duct；L2：Bypass flue；L3：Waste water input channel；L4：Air pipeline；
P1：First temperature measuring point；P2：Second temperature measuring point；P3：3rd temperature measuring point；P4：4th temperature measuring point.
Specific embodiment
According to the first embodiment of the present invention, a kind of flue gas purifying method for including flue gas temperature control is provided：
A kind of flue gas purifying method for including flue gas temperature control, this method comprise the following steps：
1) the former smoke conveying duct L1 that high-temperature flue gas is conveyed to activated carbon adsorber 1 separates bypass flue L2, cigarette Gas enters adsorption tower 1 via former smoke conveying duct L1 and bypass flue L2；
2) the step of flue gas temperature control or the step of flue gas temperature adjustment, which includes following sub-step：
1. bypass the flue gas temperature control of flue L2：It bypasses flue L2 and is equipped with atomizer 2, waste water passes through atomizer Flue gas mixing of 2 atomizations then and in bypass flue L2, waste water carry out hot friendship with entering the flue gas of bypass flue L2 It changes, forms flue gas and waste water mixed gas；Preferably, flue gas and waste water mixed gas be by 3 dedusting of deduster, flue gas and useless Impurity in water mixed gas is discharged from the solid outlet 303 of deduster 3；
2. the flue gas temperature control of former smoke conveying duct L1：Bypass flue L2 positions are separated in former smoke conveying duct L1 Downstream, be passed through cold air into former smoke conveying duct L1 to adjust the temperature of flue gas in former smoke conveying duct L1；
3. the flue gas and waste water mixed gas in bypass flue L2 are incorporated into former smoke conveying duct L1, with former flue gas It is mixed in conveyance conduit L1 by the flue gas after cold air temperature control or temperature adjustment, into adsorption tower 1；The flue gas of 1 inlet of adsorption tower Temperature is conditioned within the limits prescribed；
3) mixed flue gas enters activated carbon adsorber 1, by adsorption tower 1 activated carbon adsorption, purification after discharge, inhale The activated carbon of pollutant is discharged from 1 bottom of adsorption tower in attached flue gas.
Preferably, the sub-step of the above method 1. in, the waste water by wastewater storage tank 4 along waste water input channel L3 enter Atomizer 2.It is preferred that the waste water in wastewater storage tank 4 is neutral or alkalescence.Preferably, waste water input channel L3 is equipped with waste water Pump 5, waste water pump 5 enter atomizer 2 for waste water and provide power.
Preferably, the sub-step of the above method 2. in, the cold air is delivered to former flue gas by air pipeline L4 and conveys Pipeline L1.
Preferably, in the step 2) of the above method, bypass flue L2 positions are separated in former smoke conveying duct L1 Upstream set the first temperature measuring point P1.The position of cold air is passed through in former smoke conveying duct L1 and bypass flue L2 merges To setting the second temperature measuring point P2 between the position of former smoke conveying duct L1.On bypass flue L2 and positioned at deduster 3 downstreams set the 3rd temperature measuring point P3.On former smoke conveying duct L1, bypass flue L2 be incorporated into former smoke conveying duct The downstream of L1 positions sets the 4th temperature measuring point P4.Flue-gas temperature in first temperature measuring point P1 on-line checkings corresponding position flue T1.Flue-gas temperature T2 in second temperature measuring point P2 on-line checkings corresponding position flue.3rd temperature measuring point P3 on-line checkings correspond to Flue-gas temperature T3 at position in flue.Flue-gas temperature T4 in 4th temperature measuring point P4 on-line checkings corresponding position flue.Its In the 4th temperature measuring point P4 temperature target or setting value be T4If。
The heat Q discharged according to the flue gas into bypass flue L2Cigarette 1Waste water with spraying into bypass flue L2 The heat Q absorbedWaterIt is equal, it calculates and adjusts the sub-step 1. middle amount into the flue gas for bypassing flue L2.Further root The heat Q discharged according to the flue gas for entering adsorption tower 1 by former smoke conveying duct L1Cigarette 2With being passed through former smoke conveying duct L1 The heat Q that is absorbed of cold airGasIt is equal, it calculates and the cold air of former smoke conveying duct L1 is passed through in adjusting sub-step 2. Amount.Pass through amount, the amount for the cold air for being passed through former smoke conveying duct L1 for adjusting the flue gas into bypass flue L2 so that The temperature T4 of 4th temperature measuring point P4 is adjusted or controlled in T4If± t DEG C scope, wherein t DEG C is in 1-5 DEG C of scope.
Preferably, wherein in the temperature target of the 4th temperature measuring point P4 or setting value T4If100-145 DEG C, preferably exist Value in the range of 110-140 DEG C；That is the flue-gas temperature of 1 inlet of adsorption tower is conditioned within the limits prescribed, such as in 100- 145 DEG C, preferably in 110-140 DEG C of scope.
Preferably, the heat Q discharged according to the flue gas into bypass flue L2Cigarette 1Cigarette is bypassed with spraying into The heat Q that the waste water of feed channel L2 is absorbedWaterIt is equal, it calculates and adjusts the sub-step 1. middle flue gas into bypass flue L2 Amount, be specially：
The temperature of the former flue gas of first temperature measuring point P1 detections is T1, sets flue gas and waste water mixing at the 3rd temperature measuring point P3 positions The temperature of gas is T3If, wherein：T3IfFor 100-160 DEG C, the preferred value in the range of 110-140 DEG C；
A) calculating processing waste water institute calorific requirement：Liquid level gauge is equipped in wastewater storage tank 4, wastewater storage tank 4 is obtained according to liquid level gauge Interior wastewater flow rate to be treated is MWater, the initial temperature for detecting waste water is TWater, handle as a result, needed for the waste water in wastewater storage tank 4 The heat Q to be absorbedWaterFor：
QWater=MWaterrWater+CSteamMWaterΔTWater=MWater(rWater+CSteam(T3If-TWater)) (1),
R in formula (1)WaterFor the heat of vaporization of waste water, CSteamFor the specific heat capacity of steam；
B) exhaust gas volumn needed for bypass flue L2 is calculated：If the amount into the flue gas of bypass flue L2 is M1, The heat Q discharged as a result, into the flue gas of bypass flue L2Cigarette 1For：
QCigarette 1=CCigaretteM1ΔTCigarette 1=CCigaretteM1(T1-T3If) (2),
C in formula (2)CigaretteFor the specific heat capacity of flue gas；
By the heat Q discharged into the flue gas of bypass flue L2Cigarette 1Waste water institute with spraying into bypass flue L2 The heat Q of absorptionWaterIt is equal, it can obtain：
CCigaretteM1(T1-T3If)=MWater(rWater+CSteam(T3If-TWater)) (3),
To obtain the final product：
M1=MWater(rWater+CSteam(T3If-TWater))/(CCigarette(T1-T3If)) (4)；
Adjust the aperture of the upper bypass valves 6 of bypass flue L2 so that the amount into the flue gas for bypassing flue L2 is M1。
Preferably, the further basis is discharged by the former smoke conveying duct L1 flue gases for entering adsorption tower 1 Heat QCigarette 2The heat Q that cold air with being passed through former smoke conveying duct L1 is absorbedGasIt is equal, in calculating and adjusting sub-step 2. The amount of the cold air of former smoke conveying duct L1 is passed through, is specially：
The total amount that the flowmeter 7 of first temperature measuring point P1 upstreams measures flue gas is M0, the former flue gas of the first temperature measuring point P1 detections Temperature is T1, sets the temperature of flue gas and cold air mixed gas at the second temperature measuring point P2 positions as T2If, wherein：T2IfFor 100- 160 DEG C, the preferred value in the range of 110-140 DEG C；
A) heat that original smoke conveying duct L1 Central Plains flue gas needs discharge is calculated：Entered by former smoke conveying duct L1 The amount of the flue gas of adsorption tower 1 is (M0-M1), the heat that the flue gas of adsorption tower 1 discharged is entered by former smoke conveying duct L1 QCigarette 2For：
QCigarette 2=CCigarette(M0-M1)ΔTCigarette 2=CCigarette(M0-M1)(T1-T2If) (5),
B) amount for the cold air for being passed through former smoke conveying duct L1 is calculated：If it is passed through the cold air of former smoke conveying duct L1 Amount be MGas, the initial temperature for measuring cold air is TGas, the heat that the cold air of former smoke conveying duct L1 is absorbed is passed through as a result, Measure QGasFor：
QGas=CGasMGasΔTGas=CGasMGas(T2If-TGas) (6),
C in formula (6)GasFor the specific heat capacity of cold air；
The heat Q discharged by the flue gas for entering adsorption tower 1 by former smoke conveying duct L1Cigarette 2It is defeated with being passed through former flue gas Send the heat Q that the cold air of pipeline L1 is absorbedGasIt is equal, it can obtain：
CCigarette(M0-M1)(T1-T2If)=CGasMGas(T2If-TGas) (7)；
To obtain the final product：
MGas=CCigarette(M0-M1)(T1-T2If)/(CGas(T2If-TGas)) (8)；
Adjust the aperture of cold blast sliding valve 8 on air pipeline L4 so that the amount for being passed through the cold air of former smoke conveying duct L1 is MGas。
Preferably, it is described by adjusting the amount into the flue gas for bypassing flue L2, being passed through former smoke conveying duct The amount of the cold air of L1 so that the temperature T4 of the 4th temperature measuring point P4 is adjusted or controlled in T4If± t DEG C scope, specially：
Flue gas and waste water mixed gas in bypass flue L2 in former smoke conveying duct L1 with passing through cold air control Flue gas and the mixing of cold air mixed gas after temperature or temperature adjustment, after heat exchange occurs for two-way gas, the temperature of the 4th temperature measuring point P4 T4 is adjusted or controlled in T4If± t DEG C scope.Flue gas and waste water mixed gas in bypass flue L2 absorb (or release) Heat QCigarette+waterThe heat Q of (or absorption) is discharged with the flue gas in former smoke conveying duct L1 and cold air mixed gasCigarette+gasPhase Deng that is,：
QCigarette+water=QCigarette+gas(9),
I.e.：C1(M1+MWater)(T4If-T3If)=C2(M0-M1+MGas)(T2If-T4If) (10),
C in formula (10)1For flue gas and the specific heat capacity of waste water mixed gas；C2For flue gas and the specific heat of cold air mixed gas Hold.
Preferably, T2If=T3If=T4If。
Preferably, according to the flue-gas temperature T2 in the second temperature measuring point P2 on-line checkings corresponding position flue.If T2 Equal to T2If, continue to run with；T2 is not equal to T2If, adjustment be passed through former smoke conveying duct L1 cold air amount so that T2 is equal to T2If。
According to the flue-gas temperature T3 in the 3rd temperature measuring point P3 on-line checkings corresponding position flue.If T3 is equal to T3If, after Reforwarding row；T3 is not equal to T3If, it is adjusted into the amount of the flue gas of bypass flue L2 so that T3 is equal to T3If。
According to the flue-gas temperature T4 in the 4th temperature measuring point P4 on-line checkings corresponding position flue.If T4 is equal to T4If, after Reforwarding row；T4 is not equal to T4If, adjustment, which is passed through the amount of the cold air of former smoke conveying duct L1 and enters, bypasses flue L2's The amount of flue gas so that T4 is equal to T4If。
Preferably, in the step 3) of the above method, by adsorption tower 1 activated carbon adsorption, purified flue gas passes through Chimney 9 discharges.
Second of embodiment according to the present invention provides a kind of smoke eliminator for including flue gas temperature control：
A kind of smoke eliminator including flue gas temperature control or the smoke eliminator for the above method, the device include Adsorption tower 1, adsorption tower 1 are equipped with adsorption tower smoke inlet 101.Adsorption tower smoke inlet 101 connects with former smoke conveying duct L1 It connects.Former smoke conveying duct L1 separates bypass flue L2.It bypasses and is equipped with atomizer 2, deduster on flue L2 successively 3.Atomizer 2 is equipped with smoke inlet 201, exhanst gas outlet 202, waterwater entrance 203.Deduster 3 be equipped with gas access 301, Gas vent 302, solid outlet 303.Bypass flue L2 is incorporated into former flue gas delivery pipe after atomizer 2, deduster 3 Road L1.Atomizer 2 is arranged on the upstream of deduster 3.
Former smoke conveying duct L1 is equipped with the first booster fan 10.First booster fan 10 is arranged on bypass flue L2 is incorporated into the downstream of former smoke conveying duct L1 positions.
Air pipeline L4 is connected on former smoke conveying duct L1.Air pipeline L4 is connected to former smoke conveying duct L1 points The position and bypass flue L2 for going out to bypass flue L2 are incorporated between the position of former smoke conveying duct L1.
Preferably, which further includes the bypass valve 6 being arranged on bypass flue L2.Bypass valve 6 is located at atomization The upstream of device 2.
Preferably, which further includes the cold blast sliding valve 8 being arranged on air pipeline L4.
In the present invention, the upstream for bypass flue L2 positions being separated in former smoke conveying duct L1 sets the first thermometric Point P1.Former flue gas delivery pipe is incorporated into the position of former smoke conveying duct L1 connection air pipelines L4 and bypass flue L2 Second temperature measuring point P2 is set between the position of road L1.The 3rd is set on bypass flue L2 and positioned at 3 downstream of deduster Temperature measuring point P3.On former smoke conveying duct L1, bypass the downstream that flue L2 is incorporated into former smoke conveying duct L1 positions 4th temperature measuring point P4 is set.
Preferably, which further includes wastewater storage tank 4.Wastewater storage tank 4 is connected to atomization by waste water input channel L3 The waterwater entrance 203 of device 2.It is preferred that waste water input channel L3 is equipped with waste water pump 5.Preferably, it is equipped in wastewater storage tank 4 useless Coolant-temperature gage detection device 11.
Preferably, air pipeline L4 is equipped with air themperature detection device 12.
Preferably, on former smoke conveying duct L1, the upstream of the first temperature measuring point P1 is equipped with flowmeter 7.
Preferably, bypass flue L2 and be equipped with the second booster fan 13, the second booster fan 13 is arranged on dedusting The downstream of device 3.
Preferably, which further includes chimney 9.Adsorption tower 1 is equipped with adsorption tower exhanst gas outlet 102, adsorbs tower flue gas Outlet 102 is connected to chimney 9 via former smoke conveying duct L1.
Embodiment 1
As shown in figure 3, a kind of smoke eliminator for including flue gas temperature control, which includes adsorption tower 1, on adsorption tower 1 Equipped with adsorption tower smoke inlet 101.Adsorption tower smoke inlet 101 is connected with original smoke conveying duct L1.Former smoke conveying duct L1 separates bypass flue L2.It bypasses and is equipped with atomizer 2, deduster 3 on flue L2 successively.Atomizer 2 is equipped with cigarette Gas entrance 201, exhanst gas outlet 202, waterwater entrance 203.Deduster 3 goes out equipped with gas access 301, gas vent 302, solid Mouth 303.Bypass flue L2 is incorporated into former smoke conveying duct L1 after atomizer 2, deduster 3.Atomizer 2 is arranged on The upstream of deduster 3.
Former smoke conveying duct L1 is equipped with the first booster fan 10.First booster fan 10 is arranged on bypass flue L2 is incorporated into the downstream of former smoke conveying duct L1 positions.
Air pipeline L4 is connected on former smoke conveying duct L1.Air pipeline L4 is connected to former smoke conveying duct L1 points The position and bypass flue L2 for going out to bypass flue L2 are incorporated between the position of former smoke conveying duct L1.
The device further includes the bypass valve 6 being arranged on bypass flue L2.Bypass valve 6 is located at the upstream of atomizer 2. The device further includes the cold blast sliding valve 8 being arranged on air pipeline L4.
The upstream that bypass flue L2 positions are separated in former smoke conveying duct L1 sets the first temperature measuring point P1.In former cigarette The position of letter shoot road L1 connection air pipelines L4 and bypass flue L2 are incorporated into the position of former smoke conveying duct L1 Between the second temperature measuring point P2 is set.The 3rd temperature measuring point P3 is set on bypass flue L2 and positioned at 3 downstream of deduster. On former smoke conveying duct L1, bypass the 4th thermometric of downstream setting that flue L2 is incorporated into former smoke conveying duct L1 positions Point P4.
The device further includes wastewater storage tank 4.Wastewater storage tank 4 is connected to the waste water of atomizer 2 by waste water input channel L3 Entrance 203.Waste water input channel L3 is equipped with waste water pump 5.Waste water temperature detection device 11 is equipped in wastewater storage tank 4.
Air pipeline L4 is equipped with air themperature detection device 12.
On former smoke conveying duct L1, the upstream of the first temperature measuring point P1 be equipped with flowmeter 7.
It bypasses flue L2 and is equipped with the second booster fan 13, the second booster fan 13 is arranged on the downstream of deduster 3.
The device further includes chimney 9.Adsorption tower 1 is equipped with adsorption tower exhanst gas outlet 102, and adsorption tower exhanst gas outlet 102 passes through Chimney 9 is connected to by former smoke conveying duct L1.
Embodiment 2
A kind of flue gas purifying method for including flue gas temperature control, using the device in embodiment 1, this method includes following step Suddenly：
1) the former smoke conveying duct L1 that high-temperature flue gas is conveyed to activated carbon adsorber 1 separates bypass flue L2, cigarette Gas enters adsorption tower 1 via former smoke conveying duct L1 and bypass flue L2；
2) the step of flue gas temperature control or the step of flue gas temperature adjustment, which includes following sub-step：
1. bypass the flue gas temperature control of flue L2：It bypasses flue L2 and is equipped with atomizer 2, waste water passes through atomizer Flue gas mixing of 2 atomizations then and in bypass flue L2, waste water carry out hot friendship with entering the flue gas of bypass flue L2 It changes, forms flue gas and waste water mixed gas；Flue gas and waste water mixed gas pass through 3 dedusting of deduster, flue gas and waste water gaseous mixture Impurity in body is discharged from the solid outlet 303 of deduster 3；
2. the flue gas temperature control of former smoke conveying duct L1：Bypass flue L2 positions are separated in former smoke conveying duct L1 Downstream, be passed through cold air into former smoke conveying duct L1 to adjust the temperature of flue gas in former smoke conveying duct L1；
3. the flue gas and waste water mixed gas in bypass flue L2 are incorporated into former smoke conveying duct L1, with former flue gas It is mixed in conveyance conduit L1 by the flue gas after cold air temperature control or temperature adjustment, into adsorption tower 1；The flue gas of 1 inlet of adsorption tower Temperature is adjusted in 100-145 DEG C of scope；
3) mixed flue gas enters activated carbon adsorber 1, by adsorption tower 1 activated carbon adsorption, purification after discharge, inhale The activated carbon of pollutant is discharged from 1 bottom of adsorption tower in attached flue gas.
Embodiment 3
A kind of flue gas purifying method for including flue gas temperature control, using the device in embodiment 1, this method includes following step Suddenly：
1) the former smoke conveying duct L1 that high-temperature flue gas is conveyed to activated carbon adsorber 1 separates bypass flue L2, cigarette Gas enters adsorption tower 1 via former smoke conveying duct L1 and bypass flue L2；
2) the step of flue gas temperature control or the step of flue gas temperature adjustment, which includes following sub-step：
1. bypass the flue gas temperature control of flue L2：
It bypasses flue L2 and is equipped with atomizer 2, waste water enters atomizer by wastewater storage tank 4 along waste water input channel L3 2.Waste water in wastewater storage tank 4 is alkalescence.Waste water pump 5 on waste water input channel L3 enters atomizer 2 for waste water and provides power. Waste water is mixed by flue gas of the atomization of atomizer 2 then and in bypass flue L2, and waste water is with entering bypass flue L2 Flue gas carry out heat exchange, waste water evaporation becomes vaporous water, and vaporous water is mixed to form flue gas and waste water mixed gas with flue gas；Cigarette Gas and waste water mixed gas are by 3 dedusting of deduster, and impurity in flue gas and waste water mixed gas is from the solid outlet of deduster 3 303 discharges；
2. the flue gas temperature control of former smoke conveying duct L1：Bypass flue L2 positions are separated in former smoke conveying duct L1 Downstream, cold air is passed through to adjust cigarette in former smoke conveying duct L1 into former smoke conveying duct L1 by air pipeline L4 The temperature of gas；
3. the flue gas and waste water mixed gas in bypass flue L2 are incorporated into former smoke conveying duct L1, with former flue gas It is mixed in conveyance conduit L1 by the flue gas after cold air temperature control or temperature adjustment, into adsorption tower 1；The flue gas of 1 inlet of adsorption tower Temperature is adjusted in 100-145 DEG C of scope；
Wherein, the upstream for bypass flue L2 positions being separated in former smoke conveying duct L1 sets the first temperature measuring point P1. The position of cold air is passed through in former smoke conveying duct L1 and bypass flue L2 is incorporated into the position of former smoke conveying duct L1 Second temperature measuring point P2 is set between putting.The 3rd temperature measuring point P3 is set on bypass flue L2 and positioned at 3 downstream of deduster. On former smoke conveying duct L1, bypass the 4th survey of downstream setting that flue L2 is incorporated into former smoke conveying duct L1 positions Warm spot P4.Flue-gas temperature T1 in first temperature measuring point P1 on-line checkings corresponding position flue.Second temperature measuring point P2 on-line checkings Flue-gas temperature T2 in the flue of corresponding position.Flue-gas temperature in 3rd temperature measuring point P3 on-line checkings corresponding position flue T3.Flue-gas temperature T4 in 4th temperature measuring point P4 on-line checkings corresponding position flue.Wherein in the temperature of the 4th temperature measuring point P4 Desired value or setting value are T4If=130 DEG C.
The heat Q discharged according to the flue gas into bypass flue L2Cigarette 1Waste water with spraying into bypass flue L2 The heat Q absorbedWaterIt is equal, it calculates and adjusts the sub-step 1. middle amount into the flue gas for bypassing flue L2.Further root The heat Q discharged according to the flue gas for entering adsorption tower 1 by former smoke conveying duct L1Cigarette 2With being passed through former smoke conveying duct L1 The heat Q that is absorbed of cold airGasIt is equal, it calculates and the cold air of former smoke conveying duct L1 is passed through in adjusting sub-step 2. Amount.Pass through amount, the amount for the cold air for being passed through former smoke conveying duct L1 for adjusting the flue gas into bypass flue L2 so that The temperature T4 of 4th temperature measuring point P4 is adjusted or controlled in T4If± t DEG C scope, wherein t DEG C=3 DEG C.
The heat Q discharged according to the flue gas into bypass flue L2Cigarette 1With spraying into bypass flue L2's The heat Q that waste water is absorbedWaterIt is equal, it calculates and adjusts the sub-step 1. middle amount into the flue gas for bypassing flue L2, specifically For：
The temperature of the former flue gas of first temperature measuring point P1 detections is T1=160 DEG C, set at the 3rd temperature measuring point P3 positions flue gas and The temperature of waste water mixed gas is T3If, wherein：T3If=120 DEG C；
A) calculating processing waste water institute calorific requirement：Liquid level gauge is equipped in wastewater storage tank 4, wastewater storage tank 4 is obtained according to liquid level gauge Interior wastewater flow rate to be treated is MWater=3t/h, the initial temperature for detecting waste water are TWater=60 DEG C, wastewater storage tank 4 is handled as a result, The heat Q absorbed required for interior waste waterWaterFor：
QWater=MWaterrWater+CSteamMWaterΔTWater=MWater(rWater+CSteam(T3If-TWater)) (1),
R in formula (1)WaterFor the heat of vaporization of waste water, rWater=2358.0kJ/kg；CSteamFor the specific heat capacity of steam, CSteam= 1.890kJ/(kg·℃)；
B) exhaust gas volumn needed for bypass flue L2 is calculated：If the amount into the flue gas of bypass flue L2 is M1, The heat Q discharged as a result, into the flue gas of bypass flue L2Cigarette 1For：
QCigarette 1=CCigaretteM1ΔTCigarette 1=CCigaretteM1(T1-T3If) (2),
C in formula (2)CigaretteFor the specific heat capacity of flue gas, CCigarette=1.014kJ/ (kg DEG C)；
By the heat Q discharged into the flue gas of bypass flue L2Cigarette 1Waste water institute with spraying into bypass flue L2 The heat Q of absorptionWaterIt is equal, it can obtain：
CCigaretteM1(T1-T3If)=MWater(rWater+CSteam(T3If-TWater)) (3),
To obtain the final product：
M1=MWater(rWater+CSteam(T3If-TWater))/(CCigarette(T1-T3If))=135000Nm3/h (4)；
Adjust the aperture of the upper bypass valves 6 of bypass flue L2 so that the amount into the flue gas for bypassing flue L2 is M1。
The heat Q that further basis is discharged by the former smoke conveying duct L1 flue gases for entering adsorption tower 1Cigarette 2With It is passed through the heat Q that the cold air of former smoke conveying duct L1 is absorbedGasIt is equal, it calculates and is passed through former flue gas in adjusting sub-step 2. The amount of the cold air of conveyance conduit L1, specially：
The total amount that the flowmeter 7 of first temperature measuring point P1 upstreams measures flue gas is M0=900000Nm3/ h, the first temperature measuring point P1 The temperature of the former flue gas of detection is T1=160 DEG C, sets flue gas and the temperature of cold air mixed gas at the second temperature measuring point P2 positions For T2If, wherein：T2If=132 DEG C；
A) heat that original smoke conveying duct L1 Central Plains flue gas needs discharge is calculated：Entered by former smoke conveying duct L1 The amount of the flue gas of adsorption tower 1 is (M0-M1), the heat that the flue gas of adsorption tower 1 discharged is entered by former smoke conveying duct L1 QCigarette 2For：
QCigarette 2=CCigarette(M0-M1)ΔTCigarette=CCigarette(M0-M1)(T1-T2If) (5),
B) amount for the cold air for being passed through former smoke conveying duct L1 is calculated：If it is passed through the cold air of former smoke conveying duct L1 Amount be MGas, the initial temperature for measuring cold air is TGas=20 DEG C, the cold air for being passed through former smoke conveying duct L1 as a result, is inhaled The heat Q of receiptsGasFor：
QGas=CGasMGasΔTGas=CGasMGas(T2If-TGas) (6),
C in formula (6)GasFor the specific heat capacity of cold air, CGas=1.005kJ/ (kg DEG C)；
The heat Q discharged by the flue gas for entering adsorption tower 1 by former smoke conveying duct L1Cigarette 2It is defeated with being passed through former flue gas Send the heat Q that the cold air of pipeline L1 is absorbedGasIt is equal, it can obtain：
CCigarette(M0-M1)(T1-T2If)=CGasMGas(T2If-TGas) (7)；
To obtain the final product：
MGas=CCigarette(M0-M1)(T1-T2If)/(CGas(T2If-TGas))=196000Nm3/h (8)；
Adjust the aperture of cold blast sliding valve 8 on air pipeline L4 so that the amount for being passed through the cold air of former smoke conveying duct L1 is MGas。
The cold air by adjusting the amount into the flue gas for bypassing flue L2, being passed through former smoke conveying duct L1 Amount so that the temperature T4 of the 4th temperature measuring point P4 is adjusted or controlled in T4If± 3 DEG C of scopes, specially：
Flue gas and waste water mixed gas in bypass flue L2 in former smoke conveying duct L1 with passing through cold air control Heat exchange occurs for flue gas and the mixing of cold air mixed gas, two-way gas after temperature or temperature adjustment, bypasses the cigarette in flue L2 The heat Q that gas and waste water mixed gas are absorbedCigarette+waterWith the flue gas in former smoke conveying duct L1 and cold air mixed gas institute The heat Q of releaseCigarette+gasIt is equal, i.e.,：
QCigarette+water=QCigarette+gas(9),
I.e.：C1(M1+MWater)(T4If-T3If)=C2(M0-M1+MGas)(T2If-T4If) (10),
C in formula (10)1For flue gas and the specific heat capacity of waste water mixed gas, C1=1.009kJ/ (kg DEG C)；C2For flue gas and The specific heat capacity of cold air mixed gas, C2=1.011kJ/ (kg DEG C).
According to the flue-gas temperature T2 in the second temperature measuring point P2 on-line checkings corresponding position flue.If T2 is equal to T2If, after Reforwarding row；T2 is not equal to T2If, adjustment be passed through former smoke conveying duct L1 cold air amount so that T2 be equal to T2If。
According to the flue-gas temperature T3 in the 3rd temperature measuring point P3 on-line checkings corresponding position flue.If T3 is equal to T3If, after Reforwarding row；T3 is not equal to T3If, it is adjusted into the amount of the flue gas of bypass flue L2 so that T3 is equal to T3If。
According to the flue-gas temperature T4 in the 4th temperature measuring point P4 on-line checkings corresponding position flue.If T4 is equal to T4If, after Reforwarding row；T4 is not equal to T4If, adjustment, which is passed through the amount of the cold air of former smoke conveying duct L1 and enters, bypasses flue L2's The amount of flue gas so that T4 is equal to T4If。
3) mixed flue gas enters activated carbon adsorber 1, by adsorption tower 1 activated carbon adsorption, purification after pass through cigarette Chimney 9 discharges, and the activated carbon for having adsorbed pollutant in flue gas is discharged from 1 bottom of adsorption tower.
Embodiment 4
Embodiment 3 is repeated, simply sets flue gas and the temperature T3 of waste water mixed gas at the 3rd temperature measuring point P3 positionsIfWith Flue gas and the temperature T2 of cold air mixed gas at two temperature measuring point P2 positionsIfIt is equal, and equal at the 4th temperature measuring point P4 positions Temperature target or setting value T4If, i.e. T2If=T3If=T4If=130 DEG C.

Claims (13)

1. a kind of flue gas purifying method for including flue gas temperature control, this method comprise the following steps：
1) bypass flue (L2) is separated to the former smoke conveying duct (L1) of activated carbon adsorber (1) conveying high-temperature flue gas, Flue gas enters adsorption tower (1) via former smoke conveying duct (L1) and bypass flue (L2)；
2) the step of flue gas temperature control or the step of flue gas temperature adjustment, which includes following sub-step：
1. bypass the flue gas temperature control of flue (L2)：It bypasses flue (L2) and is equipped with atomizer (2), waste water passes through atomization Flue gas mixing of device (2) atomization then and in bypass flue (L2), waste water and the flue gas for entering bypass flue (L2) Heat exchange is carried out, forms flue gas and waste water mixed gas；Preferably, flue gas and waste water mixed gas are removed by deduster (3) Dirt, the impurity in flue gas and waste water mixed gas are discharged from the solid outlet (303) of deduster (3)；
2. the flue gas temperature control of former smoke conveying duct (L1)：Bypass flue (L2) position is separated in former smoke conveying duct (L1) The downstream put is passed through cold air to adjust the temperature of former smoke conveying duct (L1) interior flue gas into former smoke conveying duct (L1) Degree；
3. the flue gas and waste water mixed gas in bypass flue (L2) are incorporated into former smoke conveying duct (L1), with former flue gas It is mixed in conveyance conduit (L1) by the flue gas after cold air temperature control or temperature adjustment, into adsorption tower (1)；Adsorption tower (1) inlet Flue-gas temperature be conditioned within the limits prescribed；
3) mixed flue gas enters activated carbon adsorber (1), by adsorption tower (1) activated carbon adsorption, purification after discharge, inhale The activated carbon of pollutant is discharged from adsorption tower (1) bottom in attached flue gas.
2. according to the method described in claim 1, it is characterized in that：Sub-step 1. in, the waste water is by wastewater storage tank (4) along useless Water inlet pipe road (L3) enters atomizer (2)；It is preferred that the waste water in wastewater storage tank (4) is neutral or alkalescence；It is preferably, useless Water inlet pipe road (L3) is equipped with waste water pump (5), and waste water pump (5) enters atomizer (2) for waste water and provides power；And/or
Sub-step 2. in, the cold air is delivered to former smoke conveying duct (L1) by air pipeline (L4).
3. according to the method described in claim 2, it is characterized in that：In step 2), side is separated in former smoke conveying duct (L1) The upstream of road flue (L2) position sets the first temperature measuring point (P1)；The position of cold air is passed through in former smoke conveying duct (L1) It puts and bypasses between flue (L2) is incorporated into the position of former smoke conveying duct (L1) and the second temperature measuring point (P2) is set；On side The 3rd temperature measuring point (P3) is set on road flue (L2) and positioned at deduster (3) downstream；At former smoke conveying duct (L1) The downstream that upper, bypass flue (L2) is incorporated into former smoke conveying duct (L1) position sets the 4th temperature measuring point (P4)；First Flue-gas temperature T1 in the flue of temperature measuring point (P1) on-line checking corresponding position, the second temperature measuring point (P2) on-line checking correspondence position Locate the flue-gas temperature T2 in flue, the flue-gas temperature T3 in the 3rd temperature measuring point (P3) on-line checking corresponding position flue, the 4th Flue-gas temperature T4 in the flue of temperature measuring point (P4) on-line checking corresponding position；Wherein in the temperature objectives of the 4th temperature measuring point (P4) Value or setting value are T4If；
The heat Q discharged according to the flue gas into bypass flue (L2)Cigarette 1Waste water with spraying into bypass flue (L2) The heat Q absorbedWaterIt is equal, it calculates and adjusts the sub-step 1. middle amount into the flue gas for bypassing flue (L2)；Further According to the heat Q discharged by flue gas of the former smoke conveying duct (L1) into adsorption tower (1)Cigarette 2It is conveyed with being passed through former flue gas The heat Q that the cold air of pipeline (L1) is absorbedGasIt is equal, it calculates and former smoke conveying duct (L1) is passed through in adjusting sub-step 2. Cold air amount；By adjusting the amount of the flue gas into bypass flue (L2), being passed through former smoke conveying duct (L1) The amount of cold air so that the temperature T4 of the 4th temperature measuring point (P4) is adjusted or controlled in T4If± t DEG C scope, wherein t DEG C is in 1-5 DEG C scope；As preferred：Wherein in the temperature target or setting value T4 of the 4th temperature measuring point (P4)If100-145 DEG C, preferably exist Value in the range of 110-140 DEG C；That is the flue-gas temperature of adsorption tower (1) inlet is conditioned within the limits prescribed, such as 100-145 DEG C, preferably in 110-140 DEG C of scope.
4. according to the method described in claim 3, it is characterized in that：The flue gas institute according into bypass flue (L2) The heat Q of releaseCigarette 1The heat Q that waste water with spraying into bypass flue (L2) is absorbedWaterIt is equal, it calculates and adjusts sub-step 1. the amount of the middle flue gas into bypass flue (L2), is specially：
The temperature of the former flue gas of first temperature measuring point (P1) detection is T1, sets flue gas and waste water mixing at the 3rd temperature measuring point (P3) position The temperature of gas is T3If, wherein：T3IfFor 100-160 DEG C, the preferred value in the range of 110-140 DEG C；
A) calculating processing waste water institute calorific requirement：Liquid level gauge is equipped in wastewater storage tank (4), wastewater storage tank (4) is obtained according to liquid level gauge Interior wastewater flow rate to be treated is MWater, the initial temperature for detecting waste water is TWater, the waste water institute in wastewater storage tank (4) is handled as a result, Need the heat Q absorbedWaterFor：
QWater=MWaterrWater+CSteamMWaterΔTWater=MWater(rWater+CSteam(T3If-TWater)) (1),
R in formula (1)WaterFor the heat of vaporization of waste water, CSteamFor the specific heat capacity of steam；
B) exhaust gas volumn needed for bypass flue (L2) is calculated：If the amount into the flue gas of bypass flue (L2) is M1, by This, the heat Q discharged into the flue gas for bypassing flue (L2)Cigarette 1For：
QCigarette 1=CCigaretteM1ΔTCigarette 1=CCigaretteM1(T1-T3If) (2),
C in formula (2)CigaretteFor the specific heat capacity of flue gas；
By the heat Q discharged into the flue gas of bypass flue (L2)Cigarette 1Waste water institute with spraying into bypass flue (L2) The heat Q of absorptionWaterIt is equal, it can obtain：
CCigaretteM1(T1-T3If)=MWater(rWater+CSteam(T3If-TWater)) (3),
To obtain the final product：
M1=MWater(rWater+CSteam(T3If-TWater))/(CCigarette(T1-T3If)) (4)；
Adjust the aperture of bypass valve (6) on bypass flue (L2) so that into the amount of the flue gas of bypass flue (L2) For M1。
5. according to the method described in claim 4, it is characterized in that：The further basis passes through former smoke conveying duct (L1) The heat Q discharged into the flue gas of adsorption tower (1)Cigarette 2The heat that cold air with being passed through former smoke conveying duct (L1) is absorbed Measure QGasIt is equal, it calculates and the amount of the cold air of former smoke conveying duct (L1) is passed through in adjusting sub-step 2., be specially：
The total amount that the flowmeter (7) of the first temperature measuring point (P1) upstream measures flue gas is M0, the former flue gas of the first temperature measuring point (P1) detection Temperature is T1, sets at the second temperature measuring point (P2) position the temperature of flue gas and cold air mixed gas as T2If, wherein：T2IfFor 100-160 DEG C, the preferred value in the range of 110-140 DEG C；
A) heat that former smoke conveying duct (L1) Central Plains flue gas needs discharge is calculated：Entered by former smoke conveying duct (L1) The amount of the flue gas of adsorption tower (1) is (M0-M1), it is discharged by the flue gas of former smoke conveying duct (L1) into adsorption tower (1) Heat QCigarette 2For：
QCigarette 2=CCigarette(M0-M1)ΔTCigarette=CCigarette(M0-M1)(T1-T2If) (5),
B) amount for the cold air for being passed through former smoke conveying duct (L1) is calculated：If it is passed through the cold air of former smoke conveying duct (L1) Amount be MGas, the initial temperature for measuring cold air is TGas, it is passed through what the cold air of former smoke conveying duct (L1) was absorbed as a result, Heat QGasFor：
QGas=CGasMGasΔTGas=CGasMGas(T2If-TGas) (6),
C in formula (6)GasFor the specific heat capacity of cold air；
By the heat Q discharged by flue gas of the former smoke conveying duct (L1) into adsorption tower (1)Cigarette 2It is conveyed with being passed through former flue gas The heat Q that the cold air of pipeline (L1) is absorbedGasIt is equal, it can obtain：
CCigarette(M0-M1)(T1-T2If)=CGasMGas(T2If-TGas) (7)；
To obtain the final product：
MGas=CCigarette(M0-M1)(T1-T2If)/(CGas(T2If-TGas)) (8)；
Adjust the aperture of cold blast sliding valve (8) on air pipeline (L4) so that be passed through the amount of the cold air of former smoke conveying duct (L1) For MGas。
6. according to the method described in claim 5, it is characterized in that：The cigarette for entering bypass flue (L2) by adjusting The amount of gas, be passed through former smoke conveying duct (L1) cold air amount so that the temperature T4 of the 4th temperature measuring point (P4) is adjusted or control System is in T4If± t DEG C scope, specially：
Flue gas and waste water mixed gas in bypass flue (L2) in former smoke conveying duct (L1) with passing through cold air control Flue gas and the mixing of cold air mixed gas after temperature or temperature adjustment, after heat exchange occurs for two-way gas, the temperature of the 4th temperature measuring point (P4) T4 is spent to adjust or control in T4If± t DEG C scope；Flue gas and waste water mixed gas in bypass flue (L2) absorb (or Release) heat QCigarette+waterThe heat of (or absorption) is discharged with the flue gas in former smoke conveying duct (L1) and cold air mixed gas Measure QCigarette+gasIt is equal, i.e.,：
QCigarette+water=QCigarette+gas(9),
I.e.：C1(M1+MWater)(T4If-T3If)=C2(M0-M1+MGas)(T2If-T4If) (10),
C in formula (10)1For flue gas and the specific heat capacity of waste water mixed gas；C2For flue gas and the specific heat capacity of cold air mixed gas.
7. according to the method described in claim 6, it is characterized in that：T2If=T3If=T4If；And/or
According to the flue-gas temperature T2 in the flue of the second temperature measuring point (P2) on-line checking corresponding position；If T2 is equal to T2If, continue Operation；T2 is not equal to T2If, adjustment be passed through former smoke conveying duct (L1) cold air amount so that T2 be equal to T2If；
According to the flue-gas temperature T3 in the 3rd temperature measuring point (P3) on-line checking corresponding position flue；If T3 is equal to T3If, continue Operation；T3 is not equal to T3If, be adjusted into bypass flue (L2) flue gas amount so that T3 be equal to T3If；
According to the flue-gas temperature T4 in the 4th temperature measuring point (P4) on-line checking corresponding position flue；If T4 is equal to T4If, continue Operation；T4 is not equal to T4If, adjustment, which is passed through the amount of the cold air of former smoke conveying duct (L1) and enters, bypasses flue (L2) Flue gas amount so that T4 be equal to T4If。
8. according to the described method of any one of claim 1-7, it is characterised in that：In step 3), by the work in adsorption tower (1) Property charcoal absorption, purified flue gas pass through chimney (9) discharge.
9. a kind of smoke eliminator including flue gas temperature control or the flue gas for the method any one of claim 1-8 Purifier, the device include adsorption tower (1), and adsorption tower (1) is equipped with adsorption tower smoke inlet (101)；Absorption tower flue gas enters Mouth (101) is connected with former smoke conveying duct (L1)；Former smoke conveying duct (L1) separates bypass flue (L2)；Bypass cigarette Atomizer (2), deduster (3) are equipped in feed channel (L2) successively；Atomizer (2) is equipped with smoke inlet (201), exhanst gas outlet (202), waterwater entrance (203)；Deduster (3) is equipped with gas access (301), gas vent (302), solid outlet (303)； Bypass flue (L2) is incorporated into former smoke conveying duct (L1) after atomizer (2), deduster (3)；Atomizer (2) is set It puts in the upstream of deduster (3)；
Former smoke conveying duct (L1) is equipped with the first booster fan (10), and the first booster fan (10) is arranged on bypass fume pipe Road (L2) is incorporated into the downstream of former smoke conveying duct (L1) position；
Air pipeline (L4) is connected on former smoke conveying duct (L1), air pipeline (L4) is connected to former smoke conveying duct (L1) separate the position of bypass flue (L2) and bypass flue (L2) is incorporated into the position of former smoke conveying duct (L1) Between putting.
10. device according to claim 9, it is characterised in that：The device, which further includes, is arranged on bypass flue (L2) On bypass valve (6)；Bypass valve (6) is located at the upstream of atomizer (2)；And/or
The device further includes the cold blast sliding valve (8) being arranged on air pipeline (L4).
11. the device according to claim 9 or 10, it is characterised in that：Bypass cigarette is separated in former smoke conveying duct (L1) The upstream of feed channel (L2) position sets the first temperature measuring point (P1)；In former smoke conveying duct (L1) connection air pipeline (L4) Position and bypass flue (L2) set the second temperature measuring point (P2) between being incorporated into the position of former smoke conveying duct (L1)； It bypasses on flue (L2) and the 3rd temperature measuring point (P3) is set positioned at deduster (3) downstream；In former smoke conveying duct (L1) on, the 4th temperature measuring point (P4) of downstream setting that flue (L2) is incorporated into former smoke conveying duct (L1) position is bypassed.
12. according to the device any one of claim 9-11, it is characterised in that：The device further includes wastewater storage tank (4)； Wastewater storage tank (4) is connected to the waterwater entrance (203) of atomizer (2) by waste water input channel (L3)；It is preferred that waste water input pipe Road (L3) is equipped with waste water pump (5)；Preferably, waste water temperature detection device (11) is equipped in wastewater storage tank (4)；
Preferably, air pipeline (L4) is equipped with air themperature detection device (12)；And/or
On former smoke conveying duct (L1), the upstream of the first temperature measuring point (P1) be equipped with flowmeter (7).
13. according to the device any one of claim 9-12, it is characterised in that：It bypasses flue (L2) and is equipped with the Two booster fans (13), the second booster fan (13) are arranged on the downstream of deduster (3)；And/or
The device further includes chimney (9)；Adsorption tower (1) is equipped with adsorption tower exhanst gas outlet (102), adsorption tower exhanst gas outlet (102) it is connected to chimney (9) via former smoke conveying duct (L1).
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CN109092008A (en) * 2018-08-02 2018-12-28 中南大学 A kind of sintering flue gas active carbon high-efficiency purification process

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CN105879542A (en) * 2016-03-07 2016-08-24 上海龙净环保科技工程有限公司 Power plant desulfurization wastewater bypass treatment system and method and flue gas treatment system and method

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CN105879542A (en) * 2016-03-07 2016-08-24 上海龙净环保科技工程有限公司 Power plant desulfurization wastewater bypass treatment system and method and flue gas treatment system and method

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