CN100351597C - Afterheat recovery method and special appts for silcon ore furnace fume purification and nano si02 micro powder - Google Patents
Afterheat recovery method and special appts for silcon ore furnace fume purification and nano si02 micro powder Download PDFInfo
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- CN100351597C CN100351597C CNB2004100299908A CN200410029990A CN100351597C CN 100351597 C CN100351597 C CN 100351597C CN B2004100299908 A CNB2004100299908 A CN B2004100299908A CN 200410029990 A CN200410029990 A CN 200410029990A CN 100351597 C CN100351597 C CN 100351597C
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P10/25—Process efficiency
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- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The present invention relates to a waste heat recovering method and a special device thereof for purifying the smoke gas of a heating furnace for silicon ore and recovering nanometer SiO2 micropowder, which is characterized in that nanometer SiO2 micropowder is recovered from the smoke dust of the heating furnace for silicon ore, a plurality of dispersive devices for cursorily and subtly purifying smoke gas are integrated with a waste heat recovering boiler, the special device is composed of a smoke dust leading-in tube with a water sprayer., an upper conical air purifying chamber, a straight segment recovering chamber, a lower conical dust collecting chamber, a dust discharging machine and a purified air leading-out tube, wherein the upper part of the straight segment recovering chamber is composed of a plurality of metal rubber or ceramic filters with micro holes, and the lower part of the straight segment recovering chamber is composed of a plurality of tubular heat exchangers with forced circulation cooling water-cooled guide plates. The purified smoke gas reaches the discharge standard, the recovered saturated steam can be used for production and life, and the recovered nanometer SiO2 micropowder contains more than 60% of particles whose particle diameters are smaller than 100 nm.
Description
Technical field
Hot stove of silicon mine gas cleaning of the present invention, nanometer SiO
2Micro mist reclaims and the method and the special equipment thereof of waste heat recovery, belongs to smoke and dust treatment, waste heat recovery and the nanometer SiO of manufacture silicon, ferrosilicon, silicomanganese, the hot stove of ferro-silicon-calcium
2The technical field of preparation.
Technical background
Existing nanometer SiO
2Technology of preparing mainly contains following method:
(1) gas phase synthesis method
Under the nitrogen atmosphere protection, SiCl
4Produce SiO in the combustion process
2Micro mist:
SiCl
4+2H
2+O
2＝SiO
2+4HCl
This method complex process, the production cost height, the price height is difficult to apply.
(2) Sol-Gel method
Adopt siliceous raw materials such as ethyl orthosilicate, Ludox, waterglass fully to mix, regulate gel time as gel catalyst with inorganic acid with alcohols solvent.After finishing gel and filtration, handle, carry out supercritical drying again, obtain the nano-silicon aeroge at last through suitable ageing.Though the Sol-Gel method is more simple to operation than gas phase synthesis method, nanometer SiO
2Micro mist easily produces hard aggregation, and its granularity and structure are difficult to control.And production process also will be discharged large amount of sewage.
Under hot stove of silicon mine high temperature reduction atmosphere, in manufacture silicon, ferrosilicon, silicomanganese, the silico-calcium process, produce a large amount of SiO
2, CO, SO
2, C, Al
2O
3, Fe
2O
3, flue gas and dust such as MgO, CaO.For example, 6.3MVA industrial silicium mine heating furnace flue discharge capacity is 72340m
3/ h, 12.5MVA avasite heating furnace flue discharge capacity is 150000m
3More than/the h, 1 ton of industrial silicon of general every production produces the 250kg dust, and 1 ton of ferrosilicon of every production, silicomanganese, silico-calcium produce 180～200kg dust, and wherein main content is SiO in the flue dust
2Micro mist-silicon ash, purity can reach more than 90%.Hot stove of silicon mine belongs to high energy consumption, with serious pollution industrial production project.At present, most of hot stove of silicon mine does not have gas cleaning and waste heat recovery apparatus, and the flue dust that is discharged can cause the respiratory disease that humans and animals is serious, influences normal growth of teenager and growth; On plant stem-leaf, easily form adhesion layer and stop up pore, cause plant withered; Because the silicon ash is long in the air floating time, water imbibition is strong, causes the dry and air quality decline of zonal air easily.And, do not find from the hot stove of silicon mine flue dust, to reclaim nanometer SiO at present as yet
2Method and special equipment thereof.
Have only indivedual stoves to adopt traditional wet dedusting and dry method electric precipitation, sack cleaner in the existing hot stove of silicon mine, mainly there are the following problems:
The warm therapy dedusting: (1) need wash precipitation, power consumption height in a large number; (2) large amount of sewage need be provided with huge water treatment system, and the secondary pollution problem occurs; (3) because SiO
2Micro mist water absorption rate height need be provided with dehydration and drying device; (4) flue gas physics heat is not fully used; (5) production link is many, and floor space is big, and investment is high.
The dry method electric precipitation: since the hot stove of silicon mine flue dust than resistance height (10
4About Ω cm), if utilize the dry method electrostatic precipitator, need take measures such as modifier treatment to flue dust, specification requirement height, operational management complexity.Therefore, investment and operating cost are all bigger, and general enterprise is difficult to accept.
Dry-method bag-type dust collecting: the filtration duty ratio of (1) cloth bag is less, and volume ratio is bigger, and being arranges puts, take up an area of very big, the general layout difficulty, be applied to the hot stove of large ore comparatively the difficulty; (2) the cloth bag life-span low because the nanometer SiO that hot stove of silicon mine reclaims
2Micro mist, granularity is little, adheres to greatly, and is very fast with the obstruction of cloth bag filter opening, and blowback or rapping are to the deliming DeGrain, and generally using just needs to change cloth bag about 0.5 year; (3) cloth bag can not be high temperature resistant, cooling system must be set or residual neat recovering system is set for ore deposit 600 ℃ of left and right sides flue dust of hot stove; (4) because filter box is many, and ash discharging system equipment is many, each production link links more complicated, and the leakage loss phenomenon is commonplace, and secondary pollution is serious, and production environment is poor.
In the existing hot stove of silicon mine cleaner encryption device is arranged generally, its principle is to utilize under the effect of high pressure, high velocity air, the silicon ash particle clashes into mutually, gas is to the impact shear effect of silicon ash particle and impact friction, the shear action of soot dust granule and pulverizing chamber inwall, make hollow and thin-walled structure wollastonite powder broken, aggregate into 0.5mm left and right sides spheric granules again, thereby make the silicon ash from 0.15g/cm
3Be increased to 0.5～0.6g/cm
3, be convenient to packing and transportation.Because silicon ash particle hollow structure destroys, and becomes the hard aggregation structure, is unfavorable for the dispersion of micro mist, specific area obviously reduces, and silicon ash performance and Technological Economy is worth reduces.
The most of method that adopts cold wind to sneak into method and air cooler of the hot stove cleaner of existing silicon solves the flue gas cool-down problem.Though the cold wind method of sneaking into helps the formation of silicon ash, the silicon ash can significantly increase.But the silicone content of silicon product can reduce, and is difficult to improve the grade of silicon product.Simultaneously, also be to strengthen dedusting fan power and operating cost, fume afterheat does not obtain recycling.Adopt air cooler, floor space is big, and device structure is huge, has wasted the fume afterheat resource, and drops into the expense that appropriate litigation fees drops in waste heat boiler.Therefore, traditional dedusting technology is difficult to be satisfied with fully the smoke and dust treatment requirement of hot stove of silicon mine, need be transformed traditional cleaner, develops the gas cleaning, the nanometer SiO that meet hot stove of silicon mine flue dust characteristics
2The method and the special equipment thereof of micro mist recovery and waste heat recovery.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the deficiency of existing hot stove of silicon mine dust collection method and equipment thereof, provides a kind of and reclaims nanometer SiO from the hot stove of silicon mine flue dust
2Micro mist, reach dust emission standard, the incorporate hot stove of silicon mine gas cleaning of flue dust waste heat recovery, nanometer SiO
2The method and the special equipment thereof of micro mist recovery and waste heat recovery.
Hot stove of silicon mine gas cleaning, nanometer SiO
2Micro mist reclaims and the method and the special equipment thereof of waste heat recovery are achieved through the following technical solutions: an external flue dust ingress pipe on the hot stove of silicon mine smokestack, flue dust is introduced gas cleaning, nanometer SiO
2Micro mist-waste-heat recovery device.Gas cleaning, nanometer SiO
2Micro mist-waste-heat recovery device be utilize inertia-gravity dedusting, metal-rubber filter or ceramic filter, by forced circulation water-cooled deflector pipe heat exchanger cool off uniform high-temperature smoke, water smoke removes CO, SO
2With the mechanism of extinguishing spark, disperseing a plurality of thick, smart dedustings and waste heat recovery apparatus to be integrated.The similar gravitational precipitator of external form is formed by upper cone, straight section and the connection of lower cone three parts.Upper cone is that headroom chamber, straight section are nanometer SiO
2Micro mist and waste heat recovery chamber, lower cone are dust collection chamber.Between upper cone and the straight section division board is set, several metal-rubbers or ceramic capillary filter are installed on the division board.Adopting the metal-rubber filter is to twine the netted filtering pipe that compacting forms, its surface preparation one deck anti-stick coating by stainless steel wire.Adopting the ceramic capillary filter is by inorganic ceramic minute yardstick powder such as Al
2O
3, TiO
2, SiO
2, ZrO
2-Y
2O
3Form, its mass ratio is 4～7: 0.2～0.7: 1～4: 1～3, through moulding by casting, vacuum drying, high temperature sintering, dip-coating anti-stick coating, intermediate temperature setting process, prepare inorganic ceramic filter with microcellular structure.Metal-rubber or ceramic capillary filter are outside filtering type, and the filter opening aperture is less than 2 μ m, and are the labyrinth type filter openings, and dust is difficult for penetrating.Because filter opening surface and inside and outside wall surface have anti-stick coating, are adsorbed on the flue dust on the filter, are easy to come off and deashing under the effect of purge gas.Therefore, metal-rubber or ceramic filter can not only bear higher filtration velocity, and can also bear 500 ℃～600 ℃ high-temperature flue gas.The diameter of straight section is to calculate definite according to the designing requirement of gravitational precipitator.The filter area of filter is to allow wind speed to design according to filter material.At flue dust ingress pipe top a water spray projector is set, in order to remove CO, SO
2With make SiO
2Micro mist moisture absorption weightening finish helps sedimentation.Because it is moistening that dust obtains, secondary pollution when having avoided unloading ash.Straight section reclaims the chamber and is provided with forced circulation water-cooled deflector pipe heat exchanger, is made up of shellring shape vapour pipe and steel plate.Flue dust comes out to impinge upon on the forced circulation water-cooled deflector pipe heat exchanger from the ingress pipe bottom, makes the flue dust cooling first, second makes uniform rising of flue dust and decline, and three waste heats obtain reclaiming.Burden-guiding cone is a device that prevents that the inner one-tenth arch of dust from resulting in blockage.Be provided with dust unloadnig apparatus in the lower cone bottom.
Owing to adopt technique scheme, described hot stove of silicon mine nanometer SiO
2The method and the special equipment thereof of micro mist recovery and waste heat recovery, through experiment and theory analysis, obtain following beneficial effect: (1) metal-rubber or ceramic filter adopt the labyrinth type filter opening, and powder is difficult for penetrating, more effective than traditional bag filter, the headroom dust content is less than 10mg/m
3, overall clarifying smoke efficient can reach more than 99.9%, can adapt to hot stove of silicon mine flue dust variations in temperature and require and work reliably; (2) the main content of the flue dust of Hui Shouing is SiO
2Micro mist, purity are 93%～98%, and whiteness is about 50%.By TEM-200CX transmissioning electric mirror test, SiO
2Micro mist is spherical particle, and the granule size difference is bigger, and granule is about 20～30nm, and the bulky grain particle diameter is 100～200nm.And, account for more than 60% less than the particle of 100nm.The powder agglomeration is more obvious.In addition, nanometer SiO
2Particle surface coats one deck carbon black particle (about 2nm).Because carbon black is typical smoke agent for shielding.Therefore, the nanometer SiO that has light transmission
2After the coating modification of micro mist process black carbon surface, just become lighttight nanometer SiO
2, outward appearance shows grey, along with carbon content increases, is grey black; (3) cooling soft water by water-cooled deflector pipe heat exchanger, makes flue-gas temperature reduce to below 200 ℃ by 500 ℃～600 ℃ in the forced circulation mode, utilizes waste heat recovery steam.Generally the 6.3MVA hot stove of silicon mine can pressure recovery be about the about 4T/h of saturated vapor of 1.2～1.3Mpa.Steam is incorporated outer net into, can be for producing or the life use; (4) traditional thick dedusting and smart dedusting are integrated, just this special equipment can be installed, do not need other occupation of land, help modernizing and expanding the existing factory in the position that gravity or cyclone dust collectors are set; (5) the conduit top is provided with water spray projector, both can remove CO, SO
2, can make dust moistening again, can also be as spark catcher.Therefore, both help improving dust removing effects, avoided secondary pollution when also helping unloading ash.And, there is not discharge of wastewater to pollute.Therefore, the invention provides and a kind ofly from the hot stove of silicon mine flue dust, can prepare nanometer SiO
2Micro mist can purify flue dust again, new method and special equipment thereof that can also recovery waste heat.
Description of drawings
Fig. 1 is a structural representation of the present invention, among the figure: hot stove of silicon mine 1, petticoat pipe 2, flue 3, flue control valve 4, upper cone 5, straight section 6, lower cone 7, dust unloadnig apparatus 8, burden-guiding cone 9, heat exchanger 10, metal-rubber or ceramic capillary filter 11, maintenance hand-hole 12, division board 13, back-flushing valve 14, blowback air bustle pipe 15, flue dust ingress pipe 16, water spray projector 17, water pipe 18, headroom delivery line 19, blower fan 20, headroom delivery pipe 21, motor 22.
Fig. 2 is that the present invention reclaims nanometer SiO from hot stove of silicon mine
2Micro mist pattern and granularity TEM image.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described in further detail:
Among Fig. 1, hot stove of silicon mine 1 flue dust mechanism of production: manufacture silicon, ferrosilicon, silicomanganese, silico-calcium are in the hot stove high temperature reduction atmosphere of ore deposit, with highly purified SiO
2With CaO and coke gasification reaction and make.At SiO
2In the reduction reaction process of CaO, produce a large amount of SiO and CO gas and overflow, gaseous state SiO and airborne O from charge level
2Reaction generates the SiO of free state
2Micro mist, that is:
SiO
2+C＝SiO+CO
CaO+3C＝CaC
2+CO
5SiO
2+2CaC
2＝3Si+2CaSiO
3+4CO
SiO+1/2O
2＝SiO
2
The inventor shows the hot stove SiO of industrial silicium mine through sampling and testing
2Micro mist purity the highest (93%～98%), whiteness are about 50%; Next is ferrosilicon, silico-calcium, the hot stove of bannisterite.SiO
2The micro mist bulk density is 0.15～0.25g/cm
3, specific pore volume is 1.3cm
3About/g, porosity can reach more than 98%.Through detecting, flue-gas temperature is generally more than 500 ℃, and 6.3MVA industrial silicium mine heating furnace flue discharge capacity is at 72340m
3More than/the h, 12.5MVA avasite heating furnace flue discharge capacity is at 150000m
3More than/the h, industrial silicium mine heating furnace flue dustiness is 6.5g/cm
3About, ferrosilicon, silico-calcium and bannisterite heating furnace flue dustiness are 4.5g/cm
3About.
Among Fig. 1, petticoat pipe 2 and flue 3 are collected the flue gas that hot stove of silicon mine 1 produces, and by flue control valve 4 control flue gas yields, by flue dust ingress pipe 16 flue gas are introduced gas cleaning, nanometer SiO
2Micro mist-waste heat recovery apparatus.This equipment is to utilize inertia-gravity dedusting, metal-rubber or ceramic capillary filter, and forced circulation water-cooled deflector pipe heat exchanger cools off uniform high-temperature smoke, water smoke removes CO, SO
2With the mechanism of extinguishing spark, disperseing a plurality of thick, smart dedustings and waste heat recovery apparatus to be integrated.The similar gravitational precipitator of external form is made up of the flue dust ingress pipe 16 that has water spray projector 17, upper cone 5, straight section 6, lower cone 7, dust unloadnig apparatus 8, headroom delivery line 19 6 parts.Upper cone 5 is that headroom chamber, straight section 6 are nanometer SiO
2Micro mist-waste heat recovery chamber, lower cone 7 are dust collection chamber.Between upper cone 5 and the straight section 6 division board 13 is set, several metal-rubbers or ceramic capillary filter 11 are installed on the division board 13.Adopting the metal-rubber filter is to twine the gauze filter that compacting forms, its surface preparation one deck polytetrafluoroethylene (PTFE) or silicone oil anti-stick coating by φ 20～φ 100 μ m stainless steel wires.Adopting the ceramic capillary filter is by Al
2O
3, TiO
2, SiO
2, ZrO
2-Y
2O
3Fine ceramic powders is formed, its mass ratio is 4～7: 0.2～0.7: 1～4: 1～3, through overmolding cast, vacuum drying, high temperature sintering, dip-coating polytetrafluoroethylene (PTFE) or silicone oil anti-stick coating, intermediate temperature setting process, prepare inorganic ceramic filter with microcellular structure.Above-mentioned two kinds of filters are outside filtering type, and the filter opening aperture is less than 2 μ m, and are the labyrinth type filter openings, and dust is difficult for penetrating.Because filter opening surface and inside and outside wall surface have anti-stick coating, are adsorbed on the flue dust on the filter, are easy to come off and deashing under the effect of purge gas.Therefore, metal-rubber or ceramic capillary filter can not only bear higher filtration velocity, and can also bear 500 ℃～600 ℃ high-temperature flue gas.Filter area allows wind speed according to filter material, and (4～12m/min) design.Straight section 6 reclaims the chamber by several to be formed, and each recovery top, chamber is made of several filters 11, and filter 11 is fixed on the division board 13, and several headroom chambers are arranged in the upper cone 5, and headroom number of chambers amount is identical with the recovery chamber, and corresponding up and down mutually.Be provided with electronic (or pneumatic) back-flushing valve 14 and blowback air bustle pipe 15 in the bottom of each headroom chamber, blowback air is from air compressor machine.Each reclaims the bottom, chamber all one group of forced circulation water-cooled deflector pipe heat exchanger pipe heat exchanger, and each group forced circulation water-cooled deflector pipe heat exchanger pipe heat exchanger is made up of shellring shape steel plate and vapour pipe, and internal layer length is the shortest, and outer length is the longest.Flue dust comes out to impinge upon on the forced circulation water-cooled deflector pipe type heat transfer organ pipe from flue dust ingress pipe 16 bottoms, makes the flue dust cooling first, second makes uniform rising of flue dust and decline.At each flue dust ingress pipe 16 top a high pressure water-vapour spraying device 17 is set, first in order to remove CO, SO
2, second make flue dust moisture absorption weightening finish help the flue dust sedimentation, three have spark and capture function, and the four fundamental rules flue gas obtains moistening secondary pollution when having avoided unloading ash.Therefore, 80% flue dust can settle down and enter lower cone 7 dust collection chamber reclaiming the chamber, and remaining flue dust continues to move upward and enters fillter section.Purify back gas and introduce blower fans 20 inlets, form flue gas negative pressure purification process, help prolonging 20 service lifes of blower fan by headroom delivery line 19.At last, will purify in the fume emission atmosphere by blower fan 20 and headroom delivery pipe 21.Analysis of experiments shows, when the hot stove of silicon mine dust concentration is 5g/m
3The time, flue dust is through purifying the back dustiness less than 5mg/m
3, efficiency of dust collection can reach more than 99.9%.
Among Fig. 1, burden-guiding cone 9 is one and prevents that the inner one-tenth of flue dust from encircleing the device that results in blockage.In lower cone dust collection chamber bottom dust unloadnig apparatus 8 is arranged, close flue control valve 4 when unloading ash.
Among Fig. 2, the inventor is by the sub-test analysis of TEM-200CX transmission electron microscope, SiO
2Micro mist is spherical particle, and the granule particle diameter is 20～30nm, and the bulky grain particle diameter is about 100～200nm, and less than the 100nm particle greater than 60%, belong to the synthetic nanometer SiO of gas phase
2, surface silicon atoms keeps the tetrahedral coordination of oxygen, can form the silicon hydroxyl with the water effect in the external world, has the suction-operated and the hollow structure on surface, has physical absorption water, is typical polar adsorbent, drier and catalyst carrier.Nanometer SiO
2Particle surface coats one deck carbon black particle (about 2～10nm), and outward appearance shows grey, increases with carbon content, is grey black, belongs to the lighttight nanometer SiO of surface carbon coating modification
2Micro mist.
The inventor shows that by test and theory analysis when cooling water passed through water-cooled deflector pipe heat exchanger in the forced circulation mode, flue-gas temperature was reduced to below 200 ℃ by 500 ℃～600 ℃, can utilize flue dust waste heat recovery steam.General 6.3MVA hot stove of silicon mine can the about 4t/h of saturated vapor of pressure recovery 1.2～1.3Mpa about.Steam is incorporated outer net into, can be for producing or the life use.
Claims (6)
1. a hot stove of silicon mine gas cleaning, nanometer SiO
2The special equipment of micro mist recovery and waste heat recovery is characterized in that reclaiming nanometer SiO from the hot stove of silicon mine flue dust
2Micro mist, a plurality of thick, the smart flue gas purifying equipment and the waste heat recovery apparatus that disperse are integrated, and described special equipment is made up of the flue dust ingress pipe that has water spray projector, upper cone headroom chamber, straight section recovery chamber, lower cone dust collection chamber, dust unloadnig apparatus, headroom delivery line six parts.
2. special equipment according to claim 1, it is characterized in that in the Lower Half of straight section recovery chamber forced circulation water-cooled deflector pipe heat exchanger being housed, straight section reclaims between chamber and the upper cone headroom chamber division board is set, several outside filtering type metal-rubbers or ceramic capillary filter are installed on the division board, are realized gas cleaning, nanometer SiO
2Micro mist-waste heat recovery.
3. special equipment according to claim 2, it is characterized in that forced circulation water-cooled deflector pipe heat exchanger is shellring shape steel plate and vapour pipe Welding Structure, adopt gradient step pattern, take the forced circulation water-cooled, realize flue dust cooling, uniform, sedimentation and waste heat recovery.
4. special equipment according to claim 2, it is characterized in that outside filtering type metal-rubber filter is to twine the gauze filter that compacting forms by φ 20～φ 100 μ m stainless steel wires, its surface preparation one deck polytetrafluoroethylene (PTFE) or silicone oil anti-stick coating produce the metal-rubber filter with labyrinth type filter opening structure.
5. special equipment according to claim 2 is characterized in that the ceramic capillary filter is by Al
2O
3, TiO
2, SiO
2, ZrO
2-Y
2O
3Fine ceramic powders is formed, its mass ratio is 4～7: 0.2～0.7: 1～4: 1～3, through overmolding cast, vacuum drying, high temperature sintering, dip-coating polytetrafluoroethylene (PTFE) or silicone oil anti-stick coating, intermediate temperature setting process, produce inorganic ceramic millipore filter with microcellular structure.
6. one kind is reclaimed nanometer SiO from hot stove of silicon mine
2The method of micro mist is characterized in that adopting a kind of hot stove of silicon mine gas cleaning, nanometer SiO
2The special equipment of micro mist recovery and waste heat recovery, this equipment is a plurality of thick what disperse, smart flue gas purifying equipment and waste heat recovery apparatus are integrated, described special equipment is by the flue dust ingress pipe that has water spray projector, upper cone headroom chamber, straight section reclaims the chamber, lower cone dust collection chamber, dust unloadnig apparatus, headroom delivery line six parts are formed, straight section reclaims in the Lower Half of chamber forced circulation water-cooled deflector pipe heat exchanger is housed, straight section reclaims between chamber and the upper cone headroom chamber division board is set, and several outside filtering type metal-rubbers or ceramic capillary filter are installed on the division board; In hot stove of silicon mine high temperature reduction atmosphere, in manufacture silicon, ferrosilicon, silicomanganese, the silico-calcium process, from a large amount of gaseous state SiO of charge level effusion, with airborne O
2The reaction back generates the nanometer SiO of free state
2Micro mist enters the flue dust ingress pipe, under the effect of high-pressure water mist, extinguishes spark, chilling cooling, and the moisture absorption weightening finish is quickened sedimentation, can be prevented that hard aggregation and particle from growing up nanometer SiO
2After micro mist comes out from flue dust ingress pipe bottom, impinge upon on the forced circulation water-cooled deflector pipe heat exchanger, further cool uniform rising and decline, the flue dust that rises enters by metal-rubber or ceramic capillary filter forms filtration zone, the nanometer SiO that settles down
2Micro mist enters lower cone dust collection chamber, by the dust unloadnig apparatus packaging bag of packing into.
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| CN101269813B (en) * | 2008-04-15 | 2012-01-04 | 北京民海艳科技有限公司 | Novel technique for purification recovery of tiny silica flour |
| CN101385935B (en) * | 2008-05-23 | 2011-04-27 | 南安市三晶阳光电力有限公司 | Water-cooling dust-separating method of metallic silicon smelting furnace |
| CN101746765B (en) * | 2008-12-01 | 2012-04-18 | 贵州海天铁合金磨料有限责任公司 | Method and device for separating and purifying silicon dioxide micropowder from electric furnace dust |
| CN101936666B (en) * | 2010-09-17 | 2012-06-27 | 集美大学 | Process and device for recovering complementary energy of silicon smelting furnace |
| CN103063045A (en) * | 2013-01-24 | 2013-04-24 | 河南省四达仙龙实业有限公司 | Smoke-dust discharge device of medium frequency furnace |
| CN103357234B (en) * | 2013-07-23 | 2015-03-11 | 国电科学技术研究院 | Coal-fired flue gas deep purification processing device |
| CN107741159A (en) * | 2017-11-13 | 2018-02-27 | 晶科能源有限公司 | A kind of retracting device and recycling system of silicon ingot heat |
| CN109827442B (en) * | 2019-02-28 | 2023-08-29 | 中卫市茂烨冶金有限责任公司 | Multi-station flue gas and waste heat collecting device for ferrosilicon pouring |
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|---|---|---|---|---|
| JPS56121612A (en) * | 1980-03-03 | 1981-09-24 | Shintaro Yamada | Water warmer having silencer and purifier of exhaust gas |
| CN2030904U (en) * | 1987-10-18 | 1989-01-18 | 高鹤寿 | Multi-function, high efficient, low noise, multi-tube dust cleaning device |
| JPH0957036A (en) * | 1995-08-24 | 1997-03-04 | Kawasaki Steel Corp | Dry filter dust collector for blast furnace |
| US5752994A (en) * | 1994-02-24 | 1998-05-19 | The Babcock & Wilcox Company | Black liquor gasifier |
| CN2299653Y (en) * | 1997-04-10 | 1998-12-09 | 烟台宏伟集团总公司 | High-efficiency smoke and dust eliminating and desulfurizing purifier |
| CN2403488Y (en) * | 1999-12-22 | 2000-11-01 | 王海林 | Efficient desulfurizing dust control apparatus mating with boiler |
| CN2592262Y (en) * | 2002-12-23 | 2003-12-17 | 吴忠标 | Energy-saving efficient desulfurizing and dust eliminating upparatus by residual-heat utilization |
| GB2390668A (en) * | 2001-10-13 | 2004-01-14 | Alastair Robertson | Heat recovery from flue gas of a boiler |
-
2004
- 2004-04-09 CN CNB2004100299908A patent/CN100351597C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56121612A (en) * | 1980-03-03 | 1981-09-24 | Shintaro Yamada | Water warmer having silencer and purifier of exhaust gas |
| CN2030904U (en) * | 1987-10-18 | 1989-01-18 | 高鹤寿 | Multi-function, high efficient, low noise, multi-tube dust cleaning device |
| US5752994A (en) * | 1994-02-24 | 1998-05-19 | The Babcock & Wilcox Company | Black liquor gasifier |
| JPH0957036A (en) * | 1995-08-24 | 1997-03-04 | Kawasaki Steel Corp | Dry filter dust collector for blast furnace |
| CN2299653Y (en) * | 1997-04-10 | 1998-12-09 | 烟台宏伟集团总公司 | High-efficiency smoke and dust eliminating and desulfurizing purifier |
| CN2403488Y (en) * | 1999-12-22 | 2000-11-01 | 王海林 | Efficient desulfurizing dust control apparatus mating with boiler |
| GB2390668A (en) * | 2001-10-13 | 2004-01-14 | Alastair Robertson | Heat recovery from flue gas of a boiler |
| CN2592262Y (en) * | 2002-12-23 | 2003-12-17 | 吴忠标 | Energy-saving efficient desulfurizing and dust eliminating upparatus by residual-heat utilization |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1563872A (en) | 2005-01-12 |
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