CN104634126A - Treatment apparatus and method of high-boron high-fluoride flue gas for glass melting furnaces - Google Patents
Treatment apparatus and method of high-boron high-fluoride flue gas for glass melting furnaces Download PDFInfo
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Abstract
The invention discloses a treatment apparatus and method of high-boron high-fluoride flue gas for glass melting furnaces. The apparatus comprises the glass melting furnace communicated with a waste heat boiler, an air cooler and the waste heat boiler. The air outlet of the waste heat boiler is communicated with an air inlet of a reaction column. The side of the reaction column is provided with a bin used for adding calcium powder. An atomizer atomizes water and feeds the water into the reaction column for reaction between the flue gas and the calcium powder; the reaction column is connected with a dust collector; the dust collector is communicated with an ash chamber used for discharging waste ash; an air outlet of the dust collector is connected with a fan; the fan provides power to convey the dedusted flue gas from the dust collector to a chimney. The combined process of waste heat boiler cooling, dry boron-removing and fluoride-removing reaction columns and bag dust collectors is utilized, waste heat of the glue gas from the glass melting furnace is make effective use, the temperature of the flue gas is decreased to a range required by a following treatment system, boride and fluoride in the flue gas are efficiently removed, the concentration of pollutants in emitted waste gas meets the emission standard, and environment friendliness is enhanced.
Description
Technical field
The present invention relates to energy saving technical reconstruction field, particularly a kind of glass melter height boron height fluorine flue gas processing device and method.
Background technology
Along with the development of industrial technology and the progress of society, pay attention to the common recognition that energy saving standard becomes glass enterprise, for this reason, glass industry has made various effort on energy-conservation.Because oxygen-enriched combusting has energy-conservation with environmental protection two-fold advantage, natural gas oxygen-enriched combustion technology is progressively used widely at glass industry.Glass melter adopts natural gas oxygen-enriched burning, and oxygen content often increases by 1%, and theoretical temperature combustion improves about 60 DEG C, and exhaust gas volumn on average about reduces 3%, and the dust contained flue gas concentration of discharge is lower than 50mg/ Nm
3, boron oxide compound concentration is 95 mg/ Nm
3left and right, SO
2concentration is less than 400mg/Nm
3.Boron oxide compound (B
2o
3) there is the effect increasing glass low-temperature viscosity, reduce high-temperature viscosity, also having very high heat absorption coefficients and mass-absorption coefficient, in glass production, producing high borosilicate glass by adding boron element.High borosilicate glass has excellent chemical stability, lower thermal coefficient of expansion and good mechanical performance, has been widely used in precise light electrical domain and medicinal glass-tube glass tube vial field.
But, because the high temperature in glass melter causes B
2o
3volatilization, B
2o
3volatilization not only can consume a large amount of raw materials, reduces the quality of glass, also has very large erosion to stove simultaneously, shortens the service life of stove.In flue gas of glass melting furnace, boride derives from the borax raw material added, and in high boron glass batch, the chemical composition of boride is generally 11 ~ 15% (mass ratioes).Boron oxide fusing point is 450 DEG C, easily volatilizees at low temperatures.Liu little Qing adopts differential thermal analysis (DSC) and thermogravimetric analysis (TG) to carry out batch and to heat up weightless research, result show boric acid change into boride be a process of progressively dewatering (reduce the technical study that B2O3 volatilizees in borosilicate glass. Wuhan University of Technology's journal. 2013).H within the scope of 69 ~ 100 DEG C
3bO
3dehydration becomes HBO gradually
2, HBO within the scope of 100 ~ 231 DEG C
2further dehydration becomes H
2b
4o
7, H within the scope of 231 ~ 320 DEG C
2b
4o
7final dewatering becomes B
2o
3.Under glass melter 1000 DEG C of high temperature actions, B in glass batch
2o
3volatility is 8.9 ~ 12.78%, the B of volatilization
2o
3become boride in flue gas of glass melting furnace source (on the impact of Structure of Borosilicate Glasses and performance. Wuhan University of Technology's journal, 2012).Such as, in medicinal glass bottle production process, be mixed into borax in frit, the boride containing higher concentration in discharging waste gas, reaches 600 ~ 800mg/Nm
3(with B
2o
3meter).Boride comprises boric acid, HBO
2, B
2o
3deng, its composition depends on temperature and steam partial pressure.Boron oxide compound with fume emission in environment, can and the water in air react and generate boric acid and produce acid rain, to environment.The a large amount of B contained in flue gas
2o
3flue gas dew point can be caused higher, easily produce dew condensation phenomenon and stick with paste bag, adding project treatment difficulty.
Consider flue gas of glass melting furnace high temperature, high humidity, containing higher concentration boride and fluoride feature, glass melter height boron fume treatment is a systematic engineering of business, up to now, also not having the boride in effective method removal flue gas, is single treatment process at present mostly.
Flue gas of glass melting furnace outlet temperature is generally at 1000 ~ 1200 DEG C, and high temperature produces a very large impact de-boron dust pelletizing system, shows that high temperature makes pipe-line equipment aging, and cleaner burning damages.At present, the cooling measure of flue gas of glass melting furnace mainly adopts mixed cold wind to lower the temperature.The advantage of mixed air cooling is that operational management is convenient, and offer mixed air port at walling of flue, shortcoming is mixed into cold air can increase treatment quantity, machine utilization and floss hole NO
xconcentration.Such as, designing gas consumption is 1700 Nm
3the natural gas flue gas of glass melting furnace generation of/h is 6875Nm
3/ h, flue-gas temperature is reduced to 400 DEG C of needs from 1200 DEG C and is mixed into cold wind 20440 Nm
3/ h, be 3 times of actual treatment exhaust gas volumn, draught fan matching power rises to 33Kw from 12Kw.
The same with oxysulfide, nitrogen oxide, boride is that acidic materials are soluble in water, and a lot of technique adopts the method such as alkali liquor absorption and clear water washing to remove boride in flue gas of glass melting furnace, is usually divided into wet method, dry method and process for cooling fast.
Wet processing is that all pollutant component liquid of gas are carried out reactive absorption, is mainly divided into sodium alkali and ammonia absorption process etc.Utilize B
2o
3moisture-absorption characteristics make to react with ionic state with absorbent in its water-soluble solution to generate nontoxic material, be exactly current the most widely used technology.Xiao Lin adopts sodium hydroxide lye absorption tower process 120,000 Nm
3/ h boracic flue gas, empty tower gas velocity remains on 1.7m/s, inlet temperature 80 ~ 130 DEG C, and alkali lye Buffer Pool pH value is maintained at 5.5 ~ 8, and the alkali lye droplet of multilayer atomizer ejection fully contacts with boracic flue gas, chimney outlet B
2o
3concentration is less than 1 mg/m
3boron-silicon-Fe alloy electric furnace smoke gas purification system and energy saving research. environmental project, 2013).The research of Zhang Gui Ping also obtains similar results.Teller develops two-phase method boracic flue gas treating process: the first stage, in flue gas, spray NaOH, sodium carbonate and sodium acid carbonate, the mixed solution of nepheline and syenite, high-temperature flue gas makes product generate solid salt at pot bottom, flue-gas temperature is reduced to 100 ~ 150 DEG C from 260 DEG C, and relative humidity reaches 30 ~ 50%; Second stage, sprinkling aqua calcis absorb, and flue-gas temperature reduces further, reaches 85 DEG C, and in flue gas, boride clearance reaches 93.75%.Wet processing has the high advantage of removal efficiency, and weak point is, large-minded owing to processing, operating cost is high; In flue gas of glass melting furnace, fluoride is under moist environment, and metal equipment corrosion can be caused serious, and pipe-line equipment blocks, and maintenance workload is large, and fan operation does not reach the phenomenons such as mark condition.In glass flue gas, fluoride produces a very large impact glass flue gas dust collecting system, and high-effective defluorination is the important prerequisite except boron system high efficiency runs.
Mori Yoichi studies and adopts sodium hydrogen carbonate powder 200 DEG C, and average grain diameter is preferably 20 ~ 50 μm, and optimum grain-diameter is 30 μm, sodium acid carbonate and B
2o
3when mol ratio is 15:1, B
2o
3clearance is 52%, and when mol ratio is 25:1, clearance is 82%, improves 30%.But this technique is only applicable to the low-temperature flue gas of less than 200 DEG C, temperature is slightly high, and sodium acid carbonate can decompose, and decomposing the sodium carbonate produced can not react with boric acid, can not improve the removal efficiency of boride.
Philip Hurst Ge Luohuo Paderewski utilizes boride cryogenic temperature condensation characteristic, adopts quick process for cooling to remove boride.500 DEG C of glass flue gases adopt air and water to cool fast, and when flue-gas temperature is cooled to 65-100 DEG C, boron compound becomes solid phase from gas phase, and by gravity settling separation, residue boride adopts sack cleaner to filter and removes.Field, ridge behaviour also develops quick cooling and purifying boracic flue gas process, and difference is that after cooling, boride is for liquid, and the boride in waste liquid adopts press filtration to be separated, and liquid-gas ratio is 0.5 ~ 1.0L/m
3, glass melter 10,000 m
3/ h exhaust gas volumn, water consumption is 10m
3/ h.Fast cooling technique due to cooling extent excessive, cause the system cools water water yield that disappears large, thermal loss is large.
Summary of the invention
For solving the energy dissipation and this problem of environmental pollution that the glass melter height boron height fluorine flue gas that exists in above-mentioned technology brings, the invention provides a kind of glass melter height boron height fluorine flue gas processing device and method, the method employing " waste heat boiler cooling+dry method is except boron is except fluorine reaction tower+sack cleaner " group technology, effectively utilize flue gas of glass melting furnace waste heat and make flue-gas temperature be reduced to the scope of aftertreatment systems needs, boride in efficient removal flue gas and fluoride, reach the object that discharging waste gas pollutant levels reach discharge standard.The method utilizes waste heat boiler energy conservation characteristic, calcium powder powder is utilized to carry out chemical reaction characteristic with boride and fluoride in a wetted condition, utilize sack cleaner to the dust in flue gas and the efficient removal ability of unreacted calcium powder, to high temperature, high humidity, process containing the flue gas of glass melting furnace of high concentration boride and fluoride, there is the features such as energy saving of system efficiency is high, equipment corrosion rate is low, operation maintenance is simple.
The object of the invention is to realize in the following manner:
A kind of glass melter height boron height fluorine flue gas processing device, comprise glass melter, described glass melter is communicated with waste heat boiler, air-cooler is provided with between glass melter and waste heat boiler, this air-cooler sends into waste heat boiler after being mixed with flue gas by cold wind, the air outlet of described waste heat boiler is communicated with the air intake vent of reaction tower, the feed bin for adding calcium powder is provided with in described reaction tower side, send into after atomizer makes water fogging in reaction tower for realizing flue gas and calcium powder reacts, described reaction tower connects deduster, described deduster is communicated with the ash silo for discharging useless ash, the air outlet connecting fan of deduster, there is provided power to be transported in chimney from deduster by the flue gas after dedusting by blower fan to discharge.
Be provided with porous plate in described deduster, deduster is divided into dust-laden chamber and clean chamber by porous plate, and described porous plate is provided with the filter bag containing filtrate.
Be provided with flue-dust retainer bottom described deduster, ash silo communicates with flue-dust retainer.
Be communicated with by flue between described glass melter and waste heat boiler, the junction of flue and air-cooler is provided with several air admission holes.
The quantity of described air admission hole is 2 ~ 6.
A kind of glass melter height boron height fluorine flue gas processing method, comprises the following steps:
Step one, the flue gas of discharging in glass melter to be delivered in waste heat boiler through flue, and to inject cooling water in waste heat boiler, need by air-cooler to transporting cold wind in flue while supplied flue gases;
Step 2, the single storehouse pump be connected with heat boiler outlet pressurize, enter in reaction tower with the mixed flue gas of cold wind, calcium powder in feed bin is delivered in reaction tower, and the water smoke after atomization sprays in reaction tower by atomizer simultaneously, and the fluoride in flue gas and boride calcium powder fully react;
Reacted flue gas sucks in deduster with calcium powder by reaction tower for step 3, blower fan, filter in deduster and remove unreacted calcium powder, unreacted calcium powder dust reacts with the boride of remnants in flue gas further simultaneously, and the flue dust after filtration is delivered to chimney by blower fan and discharges.
The calcium powder added in step 2 comprises CaCO
3, Ca (OH)
2and CaO.
Preferably, the particle diameter size of the calcium powder added in step 2 is 20 ~ 50 μm.
Preferred, the particle diameter size of the calcium powder added in step 2 is 30 μm.
In step 2, the water smoke pressure of atomizer ejection is 2 ~ 3MPa.
Income effect: relative to prior art, the present invention to be mixed with flue gas by air-cooler and reduces certain flue-gas temperature, converts the partial heat energy of flue gas to steam or hot water, saves the energy, improve the value of the energy by waste heat boiler; In a wetted condition, the fluoride in flue gas, boride and calcium powder react, and generate calcirm-fluoride and line borate, eliminate the fluoride in flue gas and boride, filter through sack cleaner and remove the impurity such as calcirm-fluoride and line borate, prevent flue gas from entering pollution in air, enhance environment protecting; There is again anticorrosion, economical and efficient, simple operation and other advantages simultaneously.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Graphical indicia, 1, glass melter, 2, air-cooler, 3, waste heat boiler, 4, feed bin, 5, reaction tower, 6, atomizer, 7, ash silo, 8, deduster, 9, blower fan, 10, chimney, 11, porous plate.
Detailed description of the invention
Elaborate to embodiments of the invention below in conjunction with accompanying drawing, the present embodiment, premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
A kind of glass melter height boron height fluorine flue gas processing device as shown in Figure 1, comprise glass melter 1, described glass melter 1 is communicated with waste heat boiler 3 by flue, waste heat boiler 3 can adopt heat pipe boiler or horizontal smoke tube boiler, also can be other boiler, waste heat boiler 3 smoke pipe purge mode adopts hot blast jetting deashing, also can adopt steel brush deashing.Air-cooler 2 is provided with between glass melter 1 and waste heat boiler 3, the air outlet direction of air-cooler 2 is towards waste heat boiler 3, waste heat boiler 3 is sent into after cold wind mixes with flue gas by air-cooler 2, the air outlet of described waste heat boiler 3 is communicated with the air intake vent of reaction tower 5, the feed bin 4 for adding calcium powder is provided with in described reaction tower 5 side, calcium powder is sent in reaction tower 5 by feed bin 4, reaction tower 5 is communicated with an atomizer 6, atomizer 6 is communicated with outside water tank, send in reaction tower 5 after the water atomization that water tank supplies by atomizer 6 and be used for realizing flue gas and calcium powder reacts, described reaction tower 5 connects deduster 8, described deduster 8 is communicated with the ash silo 7 for discharging useless ash, the air outlet connecting fan 9 of deduster 8, flue gas after dedusting is transported in chimney 10 and discharges by this blower fan 9 from deduster 8.
In deduster 8, be provided with porous plate 11, deduster 8 is divided into dust-laden chamber and clean chamber by porous plate 11, and described porous plate 11 is provided with the filter bag containing filtrate.
Because deduster can filter the impurity such as calcium powder and fluoride, the reacted calcirm-fluoride of boride and line borate, bottom deduster 8, be provided with flue-dust retainer, calcirm-fluoride and line borate can precipitate gradually and enter in flue-dust retainer, and ash silo 7 communicates with flue-dust retainer.
In addition, be communicated with between described glass melter 1 and waste heat boiler 3 by flue, the junction of flue and air-cooler 2 is provided with several air admission holes, and the quantity of air admission hole is 2 ~ 6, port size 200 × 200mm.
A kind of glass melter height boron height fluorine flue gas processing method, comprises the following steps:
Step one, the flue gas of discharging in glass melter 1 to be delivered in waste heat boiler 3 through flue, and to inject cooling water in waste heat boiler 3, need by air-cooler 2 to transporting cold wind in flue while supplied flue gases;
Step 2, export with waste heat boiler 3 the single storehouse pump be connected and pressurize, enter in reaction tower 5 with the mixed flue gas of cold wind, calcium powder in feed bin 4 is delivered in reaction tower 5, and the water smoke after atomization sprays in reaction tower 5 by atomizer 6 simultaneously, and the fluoride in flue gas and boride calcium powder fully react;
Reacted flue gas sucks in deduster 8 with calcium powder by reaction tower 5 for step 3, blower fan, filter in deduster 7 and remove unreacted calcium powder, unreacted calcium powder dust reacts with the boride of remnants in flue gas further simultaneously, and the flue dust after filtration is delivered to chimney 10 by blower fan 9 and discharges.
By said method complete to the principle of glass melting furnaces height boron height fluorine fume treatment and income effect as follows:
Flue-gas temperature scope in glass melter 1 is 1200 ~ 1300 DEG C, a certain amount of cold wind enters in flue by air admission hole by air-cooler 2, after flue gas is mixed into a small amount of cold wind, temperature is reduced to 800 ~ 900 DEG C, after cooling, flue gas enters waste heat boiler 3, waste heat boiler 3 connects outside water system, the cooling water that heat exchanger tube Inner eycle water system in waste heat boiler 3 provides, flue gas provides hot water to cooling water heating, and after heat exchange, flue-gas temperature is 300 ~ 360 DEG C.The vapor (steam) temperature that waste heat boiler 3 produces is 320 DEG C, main steam pressure 1.4MPa, and the steam that waste heat boiler 3 produces can drive vapor wheel unit drive electrical generators to generate electricity, and the hot water produced after simultaneously heating cooling water is for having a bath or heating.
The air outlet of waste heat boiler 3 is communicated with reaction tower 5, in tower, speed air flow remains on 0.9 ~ 1.5m/s, and flue gas cowling panel is installed on tower top, and 5 atomizers are installed at middle part radially, atomizer is connected with the atomizer 6 of joining water box, the rotatable adjustment of atomizer angle 35 ~ 105 °, irrigation pressure 2 ~ 3MPa, for improving atomizing effect, salting liquid is added in water tank, the water smoke particle size range of atomizer ejection is 60 ~ 90 μm, and liquid-gas ratio is 0.03L/m3, keeps humidity about 60%.
Reaction tower 5 side is provided with the feed bin for adding calcium powder, and calcium powder comprises CaCO
3, Ca (OH)
2and CaO, proportioning is respectively 13 ~ 17%, 45 ~ 55%, 25 ~ 30%, the powder average grain diameter of calcium powder fragmentation is preferably 20 ~ 50 μm, optimum grain-diameter is 30 μm, calcium powder can adopt single storehouse pump to be input in reaction tower 5, and Venturi tube also can be adopted to spray into, and the water smoke that in reaction tower 5, calcium powder and atomizer 6 produce contacts, calcium powder surface is able to moistening, F in flue gas
-, B
2o
3also simultaneously moistening Deng sour gas, attachment also reacts with the calcium powder of alkalescence, generates corresponding calcium salt, and each theory reaction is as follows:
Ca(OH)
2+2F
-→ CaF
2+2OH
-
3Ca(OH)
2+B
2O
3→Ca
3(BO
3)
2+3H
2O
Ca(OH)
2+CO
2→ CaCO
3+H
2O
CaCO
3+2F
-+H
2O →CaF
2+CO
2+2OH
-
CaO+H
2O → Ca(OH)
2，
Wherein Ca (OH)
2with B
2o
3molar ratio range is 8 ~ 15:1, and calcium powder is in excessive state, contributes to the absorption strengthening fluoride and boride.
Installation gas outlet, reaction tower 5 bottom, gas outlet is communicated with deduster 8, in reaction tower 5, reacted flue gas, calcium salt and unreacted powder enter in deduster 8, porous plate 11 is provided with in deduster 8, deduster 8 is divided into dust-laden chamber and clean chamber by porous plate 11, and described porous plate 11 is provided with the filter bag containing filtrate, and filter bag adopts acid and alkali-resistance PTFE to make, thickness 1.80mm, air permeability is 15 ~ 40cm/s.The filter bag sustained service temperature of PTFE bearing more than 250 DEG C, instantaneous temperature 280 DEG C; Acid and alkali-resistance and oxidation, fiber is not easily aging, and filter bag also has another feature to be that waterproof is anti-blocking, even if surface contact drop also can keep integral filter performance., deduster 8 inside has steel frame to support.Bottom deduster 8, flue-dust retainer is installed, the ash content of sedimentation enters in the ash silo 7 of connected set ash bucket, and the part collection dirt in ash silo 7 returns and enters reaction tower pipeline, strengthening reaction and recycling, make its utilization that reaches capacity, bottom reaction tower 3, the dust of sedimentation also can enter in reaction tower pipeline.
In processing procedure, need to be incubated deduster 8 housing, adopt the materials such as expanded pearlite rock wool to be incubated to deduster 8 housing, insulation layer thickness 100 ~ 200mm, being cause device damage to prevent deduster 8 inner surface dust accumulation from producing to cave in, preventing the flue-dust retainer of instantaneous a large amount of dust blocking deduster 8 bottom.At place's set temperature sensors such as the bag room import transfer valve of deduster 8, flue and sack cleaner entrances, what control atomizer 6 by PLC system sprays into water yield size, and regulable control enters the flue-gas temperature of deduster 8, makes it at 280 ~ 240 DEG C.
Flue gas after deduster 8 purifies delivers to chimney 10 qualified discharge in surrounding environment through blower fan 9.
A kind of glass melter height boron height fluorine flue gas processing device described in utilization and method, both having reached the effect of environmental protection and energy saving, and created again certain economic benefit, is the specific embodiment of the present invention as follows, is certainly not limited only to following embodiment:
Scale produces pharmaceutical glass pipe 50,000 tons per year, is made up of 2 oxygen-enriched combusting glass melter production lines, wall scroll production line daily output glass solution 70 tons.Fuel adopts coke oven flue gas (or natural gas), and amount of consumed gas is 600 m
3/ h, combustion-supporting gas is high purity oxygen gas, the oxygen of 92% and the argon gas of 7%, excess oxygen coefficient 1.2.Glass melter exiting flue gas amount: 2250Nm
3/ h; Flue gas exit temperature: 1200 ~ 1300 DEG C; Dust angle of repose: dynamic angle of repose 45 °, quiet angle of repose 60 °; Dust contained flue gas concentration: dust 1.4-1.7g/Nm
3; B
2o
3: 0.6-0.8g/Nm
3; Smoke moisture (volume ratio): 55%.
Table 1 all-oxygen combustion glass furnace smoke components table (unit: %)
Particulate component table (unit: %) in table 2 all-oxygen combustion glass furnace flue gas
The consumption of its energy is respectively: day consumption coke oven flue gas 1.4 ten thousand m
3(10.5 × 10
6kJ/h), average 6900kJ/kg glass metal, wherein actually founds and heats glass metal 4.2 × 10
6kJ/h, accounts for 40%, kiln body heat radiation 2.7 × 10
6kJ/h, accounts for 26%, fume afterheat 3.57 × 10
6kJ/h, accounts for 34%.The glass melter of different tonnage, the distribution situation of energy consumption is not quite similar, the melting furnaces that tonnage is less, and the ratio that fume afterheat accounts for is larger.As recycled this part waste gas residual heat resource, not only can economize energy, and can also decreasing pollution environment.
Glass melter outlet is the high-temperature flue gas of 1200 DEG C, the easy deformation failure of hardware at this temperature, and for ensureing that follow-up UTILIZATION OF VESIDUAL HEAT IN is normally carried out, employing is mixed into a small amount of cold wind mode and reduces the temperature to 900 DEG C.Glass melter exiting flue gas amount 2250Nm
3/ h, becomes 3500 Nm after being mixed into cold wind
3/ h.
Embodiment 1: flue gas of glass melting furnace cogeneration.Flue gas of glass melting furnace enters waste heat boiler, and heat boiler outlet flue gas enters reactor.Afterheat generating system comprises two waste heat boilers and a set of condensing steam turbine generator group, and the installed capacity of steam turbine is 0.5MW.The saturated vapor of 1.40MPa-320 DEG C produced by waste heat boiler.Supporting with afterheat heat exchanger, condensing steam turbine generator group is set.Heat pipe waste heat boiler inlet exhaust gases parameter: 3500Nm3/h-900 DEG C, inlet exhaust gases dust content < 100g/Nm3, outlet exhaust temperature >=300 DEG C, feedwater parameter 2t/h-45 DEG C, superheated steam output 1t/h, P=1.4MPa-320 DEG C, boiler always leaks out≤and 1%, arrangement is outdoor.Condensing turbine rated power 0.5MW, rated speed 3000r/min.0.5MW generator rated speed 3000r/min.The equipment such as electricity generation system configuration boiler feed pump, circulating cooling water pump, mechanical-draft cooling tower and station local coordinate frame.By afterheat generating system, improve energy utilization rate 18%, reduce Enterprise Integrated energy consumption.
Waste heat boiler and reactor adopt circular steel airduct to be connected.Average grain diameter is preferably 20 ~ 50 μm, the calcium powder prepared in proportion is stored in feed bin, fully mixes, in dry process reaction device after the pressurization of single storehouse pump with flue gas.In reactor, in tower, empty tower gas velocity remains on 0.9 ~ 1.5m/s, boride, fluoride and CaCO
3, Ca (OH)
2, CaO powder reacts under moist environment.Part material and product are deposited to bottom ash bucket, and major part enters deduster with flue gas.Be 1m/min in media filtration gas speed, filter area is 60m
2, filter bag and framework expense are about 2.1 ten thousand yuan.
House outlet clean flue gas enters chimney qualified discharge in surrounding environment through frequency conversion fan.
According to producing the estimation of 360 day, day work production capacity of 24 hours year, can generate electricity 2,600,000 KWh every year.Need discharge atmospheric carbon dioxide 0.8 kilogram calculating often to consume kilowatt-hour, accumulative to reduce CO2 emissions be 2080t, this to minimizing greenhouse effects, preserving the ecological environment plays positive facilitation.By calculating with scale coal-burning power plant coal consumption 460g/kWh, mark coal 1200t can be saved year.Generated energy adds up to be 2,600,000 kilowatt hours, calculates by electricity price 0.50 yuan/kwh, creates profit 1,300,000 yuan.Energy utilization rate improves 18%, and dust clearance reaches 93%, stablizes and reaches discharge standard.
Embodiment 2: flue gas of glass melting furnace waste heat for supplying water or heating.Flue gas of glass melting furnace enters waste heat boiler, and heat boiler outlet flue gas enters reactor.Waste heat for supplying water and heating system comprise 2 waste heat boilers and 2 cover chemical water drainage facilities, water-making ability 0.3t/h, comprehensive water purifier water-making ability 12t/h.By afterheat hot water or heating system, improve energy utilization rate 18%, reduce Enterprise Integrated energy consumption.
Waste heat boiler and reactor adopt circular steel airduct to be connected.Average grain diameter is preferably 20 ~ 50 μm, the calcium powder prepared in proportion is stored in calcium powder storehouse, fully mixes, enter in dry process reaction device after the pressurization of single storehouse pump with flue gas.In dry process reaction device, in tower, empty tower gas velocity remains on 0.9 ~ 1.5m/s, boride, fluoride and CaCO
3, Ca (OH)
2, CaO powder reacts under moist environment.Part material and product are deposited to bottom ash bucket, are drained into circulation feed bin, and major part enters PTFE sack cleaner with flue gas.Be 1m/min in PTFE media filtration gas speed, filter area is 60m
2, filter bag and framework expense are about 2.1 ten thousand yuan.
Bag house outlet clean flue gas enters chimney qualified discharge in surrounding environment through frequency conversion fan.
According to producing the estimation of 360 day, day work production capacity of 24 hours year, being roughly equal to quantity of steam is 1.15 t/h, and output every day about 55 tons of steam meet plant area's demand, with the 200 yuan of calculating per ton of outsourcing steam, reduce cost about 1.1 ten thousand yuan every day, annual steam saving purchase cost about 4,000,000 yuan.Energy utilization rate improves 18%, and dust clearance reaches 93%, stablizes and reaches discharge standard.
Adopt this method, glass-melting furnace flue gas pollutant concentration of emission reaches " industrial furnace atmosphere pollutants emission standards GB9078-1996 " and " discharge standard of air pollutants GB16297-1996 " 2 grade standards, smoke dust discharge concentration < 100 mg/m
3, efficiency of dust collection>=93%, in table 3.
Pollutant secondary discharge standard in table 3 GB16297-1996
It is prior art that the present invention does not describe part.
Claims (10)
1. a glass melter height boron height fluorine flue gas processing device, comprise glass melter (1), it is characterized in that: described glass melter (1) is communicated with waste heat boiler (3), air-cooler (2) is provided with between glass melter (1) and waste heat boiler (3), waste heat boiler (3) is sent into after cold wind mixes with flue gas by this air-cooler (2), the air outlet of described waste heat boiler (3) is communicated with the air intake vent of reaction tower (5), the feed bin (4) for adding calcium powder is provided with in described reaction tower (5) side, send into after atomizer (6) makes water fogging in reaction tower (5) for realizing flue gas and calcium powder reacts, described reaction tower (5) connects deduster (8), described deduster (8) is communicated with the ash silo (7) for discharging useless ash, the air outlet connecting fan (9) of deduster (8), there is provided power that the flue gas after dedusting is transported to discharge in chimney (10) from deduster (8) by blower fan (9).
2. a kind of glass melter height boron height fluorine flue gas processing device according to claim 1, it is characterized in that: in described deduster (8), be provided with porous plate (11), deduster (8) is divided into dust-laden chamber and clean chamber by porous plate (11), and described porous plate (11) is provided with the filter bag containing filtrate.
3. a kind of glass melter height boron height fluorine flue gas processing device according to claim 1, is characterized in that: described deduster (8) bottom is provided with flue-dust retainer, and ash silo (7) communicates with flue-dust retainer.
4. a kind of glass melter height boron height fluorine flue gas processing device according to claim 1, it is characterized in that: be communicated with by flue between described glass melter (1) and waste heat boiler (3), the junction of flue and air-cooler (2) is provided with several air admission holes.
5. a kind of glass melter height boron height fluorine flue gas processing device according to claim 4, is characterized in that: the quantity of air admission hole is 2 ~ 6.
6. a kind of glass melter height boron height fluorine flue gas processing method according to claim 1,2,3,4 or 5, is characterized in that, comprise the following steps:
Step one, the flue gas of discharging in glass melter (1) is delivered to (3) in waste heat boiler through flue, and injects cooling water in waste heat boiler (3), need by air-cooler (2) to transporting cold wind in flue while supplied flue gases;
Step 2, export with waste heat boiler (3) the single storehouse pump be connected and pressurize, enter in reaction tower (5) with the mixed flue gas of cold wind, calcium powder in feed bin (4) is delivered in reaction tower (5), water smoke after atomization sprays in reaction tower (5) by atomizer (6) simultaneously, and the fluoride in flue gas and boride calcium powder fully react;
Step 3, blower fan suck in deduster (8) by reaction tower (5) with the reacted flue gas of calcium powder, filter in deduster (7) and remove unreacted calcium powder, unreacted calcium powder dust reacts with the boride of remnants in flue gas further simultaneously, and the flue dust after filtration is delivered to chimney (10) by blower fan (9) and discharges.
7. a kind of glass melter height boron height fluorine flue gas processing method according to claim 6, is characterized in that: calcium powder comprises CaCO
3, Ca (OH)
2and CaO.
8. a kind of glass melter height boron height fluorine flue gas processing method according to claim 6 or 7, is characterized in that: the particle diameter size of calcium powder is 20 ~ 50 μm.
9. described a kind of glass melter height boron height fluorine flue gas processing method according to claim 8, is characterized in that: the diameter of the particle diameter grain of calcium powder is 30 μm.
10. a kind of glass melter height boron height fluorine flue gas processing method according to claim 6, is characterized in that: the water smoke pressure that described atomizer (6) sprays is 2 ~ 3MPa.
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Application publication date: 20150520 |