CN103471405A - Method of recovering flue gas waste heat and dust in nonferrous metal smelting - Google Patents
Method of recovering flue gas waste heat and dust in nonferrous metal smelting Download PDFInfo
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- CN103471405A CN103471405A CN2013104011180A CN201310401118A CN103471405A CN 103471405 A CN103471405 A CN 103471405A CN 2013104011180 A CN2013104011180 A CN 2013104011180A CN 201310401118 A CN201310401118 A CN 201310401118A CN 103471405 A CN103471405 A CN 103471405A
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- 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
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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- 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
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
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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
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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Abstract
The invention relates to a method of recovering flue gas waste heat and dust in nonferrous metal smelting and belongs to a method of waste heat utilization and waste gas treatment. A waste heat recovery device and a dust recovery device are formed by connecting a counter flow heat exchange waste heat boiler A, a silicon nitride porous ceramic filter, a counter flow heat exchange waste heat boiler B, a counter flow heat exchange waste heat boiler medium preheater, a plate type passage gas counter flow heat exchanger, a bag filter, and a draught fan through a pipeline or pipes; flue gas subjected to waste heat and dust recovery is subjected to sulfur recovery in a desulfurization shop, and the tail gas can be discharged standardly. The method includes the steps of primary waste heat recovery, filtration, dedusting and purification of high temperature flue gas, secondary waste heat recovery, tertiary waste heat recovery, quaternary waste heat recovery, low temperature filtration and dedusting, sulfur recovery, and emission of tail gas under national standard. The method has the advantages that waste heat recovery is efficient, dust recovery is complete, process control is simple, and recovery cost is low.
Description
Technical field
The present invention is the recoverying and utilizing method of a kind of smelting non-ferrous metal fume afterheat and dust.The method that belongs to UTILIZATION OF VESIDUAL HEAT IN and exhaust-gas treatment.
Background technology
The a large amount of heat energy of nonferrous metallurgical process consumption, come spontaneous combustion coal, oil, casing-head gas or electric energy.In nonferrous metallurgical process, the flue gas of discharge is up to more than 1000 ℃, and the heat of taking away accounts for the over half of metal smelt total energy consumption.Wherein temperature accounts for 52% of total fume afterheat higher than the fume afterheat of 1000 ℃, the middle high-temperature residual heat of temperature between 600～1000 ℃ accounts for 26% of total fume afterheat, lower than the low temperature exhaust heats of 600 ℃ account for total fume afterheat 22%. therefore, the waste heat carried in the flue gas of smelting non-ferrous metal discharge is the valuable energy.Data statistics is arranged, and in the residual heat resources of nonferrous metallurgy industry, the fume afterheat resource accounts for more than 80% of available residual heat resources.The recycling of the heat energy that the flue gas of smelting non-ferrous metal discharge carries is the important step of metal smelt industry energy conservation consumption reduction.
In prior art, the recycling of non-ferrous metal metallurgy fume afterheat, mostly adopt waste heat boiler, only the high-temperature flue gas waste heat recycled, and middle-low temperature heat is not also recycled fully, therefore, exists the residual heat resources rate of recovery lower.Still have part of waste heat to enter atmosphere with tail gas.Both wasted energy, again contaminated environment.
The recovery method of dust in non-ferrous metal metallurgy flue gas of the prior art, have dry method to gather dust and wet dust collector.Dry method is gathered dust and is reclaimed dust and use morely, exists process control unstable, burns out the cloth bag recover, or the fault that cloth bag stops up happens occasionally, and energy consumption is higher.
A kind of high-temperature residual heat that not only reclaims, and the recovery middle-low temperature heat, waste heat recovery efficiency is high, and dust reclaims fully, and low equipment investment, technology controlling and process is easy, cost recovery is lower smelting non-ferrous metal fume afterheat and the recoverying and utilizing method of dust, be that people expect.
Summary of the invention
The object of the invention is to avoid above-mentioned weak point of the prior art, and provide a kind of high-temperature residual heat that not only reclaims, and recovery middle-low temperature heat, waste heat recovery efficiency is high, dust reclaims fully, and low equipment investment, technology controlling and process is easy, cost recovery is lower smelting non-ferrous metal fume afterheat and the recoverying and utilizing method of dust.
Purpose of the present invention can reach by following measure:
The recoverying and utilizing method of smelting non-ferrous metal fume afterheat of the present invention and dust, comprise waste-heat recovery device and device for recovering powder, it is characterized in that described waste-heat recovery device and device for recovering powder are by countercurrent flow waste heat boiler A(1), porous SiN ceramic filter (2), countercurrent flow waste heat boiler B(3), countercurrent flow waste heat boiler working medium preheater (4), chip runner back flow of gas heat exchanger (5), bag type filtering deduster (6), air-introduced machine (7) is formed by connecting by pipeline or pipe fitting, flue gas after waste heat and dust recovery removes sulfur removal plant (8), after sulfur recovery is processed, the tail gas qualified discharge,
Described recoverying and utilizing method comprises the steps:
1.. the waste heat one-level reclaims
The smelting non-ferrous metal flue gas enters countercurrent flow waste heat boiler A(1), with working medium countercurrent flow in boiler, the high temperature heat that it is carried passes to boiler working substance; Flue gas self temperature is reduced to≤700 ℃ realize that the waste heat one-level reclaims;
2.. the filtering high-temperature flue gas udst separation
Through step 1. the flue gas of waste heat one-level after reclaiming enter porous SiN ceramic filter (2), dust removal by filtration purifies;
3.. the waste heat secondary recovery
Through step 2. the flue gas of dust removal by filtration after purifying enter countercurrent flow waste heat boiler (3), with the boiler working substance countercurrent flow, the thermal energy transfer that it is carried is to boiler evaporating working medium; Flue gas self temperature is reduced to≤400 ℃ realize the waste heat secondary recovery;
4.. three grades of recovery of waste heat
Through step 3. the flue gas after the waste heat secondary recovery enter countercurrent flow waste heat boiler working medium preheater (4), with the working medium countercurrent flow of countercurrent flow waste heat boiler working medium preheater (4), the thermal energy transfer that it is carried is to the working medium of boiler working substance preheater; Flue gas self temperature is reduced to≤150 ℃ realize three grades of recovery of waste heat;
5.. the level Four waste heat recovery
Through step 4. the flue gas after three grades of recovery of waste heat enter chip runner back flow of gas heat exchanger (5), the thermal energy transfer that it is carried is to air at room temperature, the hot-air of generation is for hot-air user use, self temperature is reduced to≤70 ℃;
6.. the filter at low temperature dedusting
Through the 5. low-temperature flue gas after the air waste heat recovery of step, enter bag type filtering deduster (6), further dust removal by filtration purifies; In flue gas, dust is removed more than 98%;
7.. desulfurization
Through step after 5. the flue gas after dust removal by filtration is sent into sulfur removal plant (8) sulfur recovery and processed, the tail gas qualified discharge.
From thermodynamic (al) theory, the most rational heat exchange mode is countercurrent flow, and under same heat transfer boundary condition, countercurrent flow can be realized the uniform temperature difference, and the irreversible loss that makes heat transfer process produce is little, therefore changes efficiency high.The technical scheme that the waste heat carried in the flue gas that the present inventor adopts countercurrent heat exchange method to discharge for the metallic copper melting is recycled, for solving the technical problem to be solved in the present invention, made outstanding contribution.
Porous ceramics is high temperature resistant, density is low, chemical stability is good, is applicable to the high temperature fluid filter.Especially the stable covalent structure of silicon nitride, give many excellent properties such as its fusing point is high, elevated temperature strength is high, hardness is high, elastic modelling quantity is large, wear-resisting, thermal coefficient of expansion is little, Heat stability is good.Therefore, that porous SiN ceramic has is high temperature resistant, corrosion-resistant, anti-thermal shock, anti-oxidant, wear-resistant etc. good, and in technical scheme of the present invention, the porous SiN ceramic filter of selecting, produced unexpected technique effect to completing task of the present invention.
Purpose of the present invention can also reach by following measure:
The recoverying and utilizing method of smelting non-ferrous metal fume afterheat of the present invention and dust, is characterized in that during step 2. the porous SiN ceramic filter (2) adopted, the silicon nitride foam ceramic material manufacture of selecting silicon nitride, aluminium oxide and yittrium oxide to form.Three's mass percent consists of silicon nitride: aluminium oxide: yittrium oxide=90:2:8.
It is a preferred technical scheme.
The recoverying and utilizing method of smelting non-ferrous metal fume afterheat of the present invention and dust, it is characterized in that step 1., 3., the waste-heat recovery device countercurrent flow waste heat boiler A(1 that adopts in 4.), countercurrent flow waste heat boiler B(3) and countercurrent flow waste heat boiler working medium preheater (4) flue gas reclaim the heat exchange employing pair bushing type countercurrent heat exchange methods between working medium with boiler afterheat, or three bushing type countercurrent heat exchange methods; Wherein:
Described pair of bushing type countercurrent heat exchange method, the heat-exchanger rig two straight tube suit configurations different by several diameters constitute, and flue gas is walked central tube, and waste heat recovery working medium is walked the annular space pipe, and the two flow direction is contrary, realizes countercurrent flow;
Described three bushing type countercurrent heat exchange methods, the heat-exchanger rig three straight tube suit configurations different by diameter form, and flue gas is walked central tube and outer annular space, and waste heat recovery working medium is walked interior annular space pipe, and the two flow direction is contrary, realizes countercurrent flow.
It is preferred technical scheme.
The recoverying and utilizing method of smelting non-ferrous metal fume afterheat of the present invention and dust, it is characterized in that step 1., 3., 4. in waste-heat recovery device countercurrent flow waste heat boiler A(1), countercurrent flow waste heat boiler B(3) and the heat exchange of reclaiming between working medium of countercurrent flow waste heat boiler working medium preheater (4) flue gas and boiler afterheat all adopt two bushing type countercurrent heat exchange methods. heat-exchanger rig two straight tubes different by several diameters are set with to configure and constitute, flue gas is walked central tube, waste heat recovery working medium is walked the annular space pipe, the two flow direction is contrary, realizes countercurrent flow.
It is a preferred technical scheme.
The recoverying and utilizing method of smelting non-ferrous metal fume afterheat of the present invention and dust, it is characterized in that step 1., 3., the waste-heat recovery device countercurrent flow waste heat boiler A(1 that adopts in 4.), countercurrent flow waste heat boiler B(3) and countercurrent flow waste heat boiler working medium preheater (4) flue gas and boiler working substance between heat exchange all adopt three bushing type countercurrent heat exchange methods, the heat-exchanger rig three straight tube suit configurations different by diameter form, flue gas is walked central tube and outer annular space, waste heat recovery working medium is walked interior annular space pipe, the two flow direction is contrary, realizes countercurrent flow.
It is a preferred technical scheme.
The recoverying and utilizing method of smelting non-ferrous metal fume afterheat of the present invention and dust, is characterized in that step is 1., 3., adopt waste-heat recovery device countercurrent flow waste heat boiler A(1 in 4.) flue gas all adopts pair bushing type countercurrent heat exchange methods with the heat exchange that boiler afterheat reclaims between working medium; Countercurrent flow waste heat boiler B(3) and the heat exchange between countercurrent flow waste heat boiler working medium preheater (4) flue gas and boiler working substance adopt three bushing type countercurrent heat exchange methods.
It is most preferred technical scheme.
The recoverying and utilizing method of smelting non-ferrous metal fume afterheat of the present invention and dust, it is characterized in that 5. chip runner back flow of gas heat exchanger (5) of step, by many groups runner sheet heat exchange unit, formed, every group of runner sheet heat exchange unit is comprised of the runner sheet A and the runner sheet B that link together by shared heat exchanger plates, the upper end of the side of runner sheet A has the runner entrance, and another relative lower end, side has runner exit; The lower end of the side of runner sheet B has the runner entrance, and another relative upper end, side has runner exit; Flue gas and air by runner sheet A or runner sheet B, are realized countercurrent flow respectively.
Chip runner back flow of gas heat exchanger heat exchange efficiency is high, flue-gas temperature after heat exchange drops to≤and 70 ℃, the fault of fundamentally having avoided the bag type filtering deduster to be burnt ring, make the bag type filtering deduster in dust collecting process, maximize favourable factors and minimize unfavourable ones, continue on in dust collecting process.
The recoverying and utilizing method of smelting non-ferrous metal fume afterheat of the present invention and dust, is characterized in that waste heat that the flue gas during smelting of described flue-gas temperature≤1000 ℃ carries and the recoverying and utilizing method of dust, and described step is 3.. the waste heat secondary recovery, saving need not.It is preferred technical scheme.
The recoverying and utilizing method of smelting non-ferrous metal fume afterheat of the present invention and dust, the working medium that it is characterized in that described waste heat boiler working medium or waste heat boiler working medium preheater is water or low boiling organic working medium.
The application of the recoverying and utilizing method of smelting non-ferrous metal fume afterheat of the present invention and dust, the waste heat that the flue gas that it is characterized in that being applicable to discharge in useless composition brass refining production technology carries and the recycling of dust.
The application of the recoverying and utilizing method of smelting non-ferrous metal fume afterheat of the present invention and dust, the waste heat that the flue gas that it is characterized in that being applicable to discharge in copper, nickel, lead, zinc smelting technology process units carries and the recycling of dust.
The recoverying and utilizing method of smelting non-ferrous metal fume afterheat of the present invention and dust can produce following unexpected technique effect compared to existing technology:
1. a kind of high-temperature residual heat that not only reclaims is provided, and recovery middle-low temperature heat, waste heat recovery efficiency is high, and dust reclaims fully, and the lower smelting non-ferrous metal fume afterheat of low equipment investment, cost recovery that technology controlling and process is easy and the recoverying and utilizing method of dust.
2. adopt level Four waste heat recovery, the heat recovery rate of carrying in flue gas >=95%.
3. adopt the porous SiN ceramic filter, realized the udst separation for high-temperature flue gas, fume recovery rate >=90%, for follow-up heat recovery with dust reclaims and the normal operation of sulfuric acid plant provides assurance.
4. adopt chip runner back flow of gas heat exchanger, flue-gas temperature after heat exchange drops to≤and 70 ℃, the fault of fundamentally having avoided the bag type filtering deduster to be burnt ring, make the bag type filtering deduster in dust collecting process, maximize favourable factors and minimize unfavourable ones, continue on in dust collecting process.
Through the bag type filtering deduster at≤70 ℃ of temperature after dedusting, the dust dust removal efficiency in flue gas reaches more than 98%, has guaranteed the effectively normal operation of sulfur removal plant sulfur recovery technique.
6. waste heat recovery rate is high, and dust purification is complete, and emission reaches discharge standard.For saving the energy, protection of the environment has been made contribution.
The accompanying drawing explanation
Fig. 1 is the recoverying and utilizing method of smelting non-ferrous metal fume afterheat of the present invention and dust.Process flow diagram.Wherein:
1.-countercurrent flow waste heat boiler A
2.-porous SiN ceramic filter
3.-countercurrent flow waste heat boiler B
4.-countercurrent flow waste heat boiler working medium preheater
5.-board-like counterflow air heat exchanger
6.-bag type filtering deduster
7.-air-introduced machine
8.-sulfur removal plant
The specific embodiment
The present invention will now be further detailed embodiment:
Embodiment 1
The recoverying and utilizing method of a kind of non-ferrous metal copper melting fume afterheat of the present invention and dust
Comprise waste-heat recovery device and device for recovering powder, it is characterized in that described waste-heat recovery device and device for recovering powder are by countercurrent flow waste heat boiler A(1), porous SiN ceramic filter (2), countercurrent flow waste heat boiler B(3), countercurrent flow waste heat boiler working medium preheater (4), chip runner back flow of gas heat exchanger (5), bag type filtering deduster (6), air-introduced machine (7) be formed by connecting by pipeline or pipe fitting, after flue gas desulfuration acid workshop (8) desulfurization after waste heat and dust recovery is processed, the tail gas qualified discharge;
Described recoverying and utilizing method comprises the steps:
1.. the waste heat one-level reclaims
The flue gas of 1400 ℃ from the copper refining stove enters countercurrent flow waste heat boiler A(1), with working medium countercurrent flow in boiler, the high temperature heat that it is carried passes to boiler working substance; Flue gas self temperature is reduced to≤700 ℃ realize that the waste heat one-level reclaims; At countercurrent flow waste heat boiler A(1) in, flue gas adopts two bushing type countercurrent heat exchange methods from the heat exchange that boiler afterheat reclaims between working medium. and the heat-exchanger rig two straight tube suit configurations different by several diameters constitute, flue gas is walked central tube, waste heat recovery working medium is walked the annular space pipe, the two flow direction is contrary, realizes countercurrent flow.
2.. the filtering high-temperature flue gas udst separation
Through step 1. the flue gas of waste heat one-level after reclaiming enter porous SiN ceramic filter (2), dust removal by filtration purifies; The porous SiN ceramic filter (2) adopted, the silicon nitride foam ceramic material manufacture of selecting silicon nitride, aluminium oxide and yittrium oxide to form.Three's mass percent consists of silicon nitride: aluminium oxide: yittrium oxide=90:6:4.
3.. the waste heat secondary recovery
Through step 2. the flue gas of dust removal by filtration after purifying enter countercurrent flow waste heat boiler (3), with the boiler working substance countercurrent flow, the thermal energy transfer that it is carried is to boiler evaporating working medium; Flue gas self temperature is reduced to≤400 ℃ realize the waste heat secondary recovery; In countercurrent flow waste heat boiler (3), flue gas adopts two bushing type countercurrent heat exchange methods from the heat exchange that boiler afterheat reclaims between working medium. and the heat-exchanger rig two straight tube suit configurations different by several diameters constitute, flue gas is walked central tube, waste heat recovery working medium is walked the annular space pipe, the two flow direction is contrary, realizes countercurrent flow.
4.. three grades of recovery of waste heat
Through step 3. the flue gas after the waste heat secondary recovery enter countercurrent flow waste heat boiler working medium preheater (4), with the working medium countercurrent flow of countercurrent flow waste heat boiler working medium preheater (4), the thermal energy transfer that it is carried is to the working medium of boiler working substance preheater; Flue gas self temperature is reduced to≤150 ℃ realize three grades of recovery of waste heat; In countercurrent flow waste heat boiler working medium preheater (4), flue gas adopts two bushing type countercurrent heat exchange methods from the heat exchange that boiler afterheat reclaims between working medium. and the heat-exchanger rig two straight tube suit configurations different by several diameters constitute, flue gas is walked central tube, waste heat recovery working medium is walked the annular space pipe, the two flow direction is contrary, realizes countercurrent flow.
5.. the level Four waste heat recovery
Through step 4. the flue gas after three grades of recovery of waste heat enter chip runner back flow of gas heat exchanger (5), the thermal energy transfer that it is carried is to air at room temperature, the hot-air of generation is for the refining oxidation stage utilization of copper, self temperature is reduced to≤70 ℃; Chip runner back flow of gas heat exchanger (5) is comprised of many groups runner sheet heat exchange unit, every group of runner sheet heat exchange unit is comprised of the runner sheet A and the runner sheet B that link together by shared heat exchanger plates, the upper end of the side of runner sheet A has the runner entrance, and another relative lower end, side has runner exit; The lower end of the side of runner sheet B has the runner entrance, and another relative upper end, side has runner exit; Flue gas and air by runner sheet A or runner sheet B, are realized countercurrent flow respectively.
6.. the filter at low temperature dedusting
Through the 5. low-temperature flue gas after the air waste heat recovery of step, enter bag type filtering deduster (6), further dust removal by filtration purifies;
7.. desulfurization
Through step after 5. the flue gas after dust removal by filtration is sent into sulfur removal plant (8) sulfur recovery and processed, the tail gas qualified discharge.
The heat recovery rate of carrying in flue gas >=95%., fume recovery rate >=98%.
The recoverying and utilizing method of a kind of non-ferrous metal copper melting fume afterheat of the present invention and dust
According to method and the step of embodiment 1, difference is:
1.. 1350 ℃ of flue-gas temperatures
2.. step 1., 3., the waste-heat recovery device countercurrent flow waste heat boiler A(1 that adopts in 4.), countercurrent flow waste heat boiler B(3) and countercurrent flow waste heat boiler working medium preheater (4) flue gas and boiler working substance between heat exchange all adopt three bushing type countercurrent heat exchange methods, the heat-exchanger rig three straight tube suit configurations different by diameter form, flue gas is walked central tube and outer annular space, waste heat recovery working medium is walked interior annular space pipe, the two flow direction is contrary, realizes countercurrent flow.
The heat recovery rate of carrying in flue gas >=97%., fume recovery rate >=98%.
The recoverying and utilizing method of a kind of non-ferrous metal copper melting fume afterheat of the present invention and dust
According to method and the step of embodiment 1, difference is: the heat exchange that countercurrent flow waste heat boiler A(1) flue gas and boiler afterheat reclaim between working medium all adopts two bushing type countercurrent heat exchange methods;
1.. 1400 ℃ of flue-gas temperatures
2.. countercurrent flow waste heat boiler B(3) and countercurrent flow waste heat boiler working medium preheater (4) flue gas and boiler working substance between heat exchange adopt three bushing type countercurrent heat exchange methods.
The heat recovery rate of carrying in flue gas >=96%., fume recovery rate >=98%.
The recoverying and utilizing method of a kind of non-ferrous metal nickel melting fume afterheat of the present invention and dust
Method and step according to claim 1.Difference is: smoke treatment is from the flue gas discharged in non-ferrous metal nickel smelting technology process units, 1380 ℃ of flue-gas temperatures.
The heat recovery rate of carrying in flue gas >=96%., fume recovery rate >=98%.
The recoverying and utilizing method of a kind of non-ferrous metal lead smelting fume afterheat of the present invention and dust
According to method and the step of claim 1, adopt the heat exchange mode of embodiment 2.Difference is: smoke treatment is from the flue gas discharged in non-ferrous metal lead smelting explained hereafter device, 1350 ℃ of flue-gas temperatures.
The heat recovery rate of carrying in flue gas >=97%., fume recovery rate >=98%.
The recoverying and utilizing method of a kind of non-ferrous zinc melting fume afterheat of the present invention and dust
According to method and the step of claim 1, adopt the heat exchange mode of embodiment 3.Difference is: smoke treatment is from the flue gas discharged in non-ferrous zinc smelting technology process units, 1300 ℃ of flue-gas temperatures.
The heat recovery rate of carrying in flue gas >=96%., fume recovery rate >=98%.
Claims (10)
1. the recoverying and utilizing method of a smelting non-ferrous metal fume afterheat and dust, comprise waste-heat recovery device and device for recovering powder, it is characterized in that described waste-heat recovery device and device for recovering powder are by countercurrent flow waste heat boiler A(1), porous SiN ceramic filter (2), countercurrent flow waste heat boiler B(3), countercurrent flow waste heat boiler working medium preheater (4), chip runner back flow of gas heat exchanger (5), bag type filtering deduster (6), air-introduced machine (7) is formed by connecting by pipeline or pipe fitting, flue gas after waste heat and dust recovery removes sulfur removal plant (8), after sulfur recovery is processed, the tail gas qualified discharge,
Described recoverying and utilizing method comprises the steps:
1.. the waste heat one-level reclaims
The smelting non-ferrous metal flue gas enters countercurrent flow waste heat boiler A(1), with working medium countercurrent flow in boiler, the high temperature heat that it is carried passes to boiler working substance; Flue gas self temperature is reduced to≤700 ℃ realize that the waste heat one-level reclaims;
2.. the filtering high-temperature flue gas udst separation
Through step 1. the flue gas of waste heat one-level after reclaiming enter porous SiN ceramic filter (2), dust removal by filtration purifies;
3.. the waste heat secondary recovery
Through step 2. the flue gas of dust removal by filtration after purifying enter countercurrent flow waste heat boiler (3), with the boiler working substance countercurrent flow, the thermal energy transfer that it is carried is to boiler evaporating working medium; Flue gas self temperature is reduced to≤400 ℃ realize the waste heat secondary recovery;
4.. three grades of recovery of waste heat
Through step 3. the flue gas after the waste heat secondary recovery enter countercurrent flow waste heat boiler working medium preheater (4), with the working medium countercurrent flow of countercurrent flow waste heat boiler working medium preheater (4), the thermal energy transfer that it is carried is to the working medium of boiler working substance preheater; Flue gas self temperature is reduced to≤150 ℃ realize three grades of recovery of waste heat;
5.. the level Four waste heat recovery
Through step 4. the flue gas after three grades of recovery of waste heat enter chip runner back flow of gas heat exchanger (5), the thermal energy transfer that it is carried is to air at room temperature, the hot-air of generation is for hot-air user use, self temperature is reduced to≤70 ℃;
6.. the filter at low temperature dedusting
Through the 5. low-temperature flue gas after the air waste heat recovery of step, enter bag type filtering deduster (6), further dust removal by filtration purifies; In flue gas, dust is removed more than 98%;
7.. desulfurization
Through step after 5. the flue gas after dust removal by filtration is sent into sulfur removal plant (8) sulfur recovery and processed, the tail gas qualified discharge.
2. according to the recoverying and utilizing method of smelting non-ferrous metal fume afterheat claimed in claim 1 and dust, it is characterized in that during step 2. the porous SiN ceramic filter (2) adopted, the silicon nitride foam ceramic material manufacture of selecting silicon nitride, aluminium oxide and yittrium oxide to form.Three's mass percent consists of silicon nitride: aluminium oxide: yittrium oxide=90:2:8.
3. according to the recoverying and utilizing method of smelting non-ferrous metal fume afterheat claimed in claim 1 and dust, it is characterized in that step 1., 3., the waste-heat recovery device countercurrent flow waste heat boiler A(1 that adopts in 4.), countercurrent flow waste heat boiler B(3) and countercurrent flow waste heat boiler working medium preheater (4) flue gas reclaim the heat exchange employing pair bushing type countercurrent heat exchange methods between working medium with boiler afterheat, or three bushing type countercurrent heat exchange methods; Wherein:
Described pair of bushing type countercurrent heat exchange method, the heat-exchanger rig two straight tube suit configurations different by several diameters constitute, and flue gas is walked central tube, and waste heat recovery working medium is walked the annular space pipe, and the two flow direction is contrary, realizes countercurrent flow;
Described three bushing type countercurrent heat exchange methods, the heat-exchanger rig three straight tube suit configurations different by diameter form, and flue gas is walked central tube and outer annular space, and waste heat recovery working medium is walked interior annular space pipe, and the two flow direction is contrary, realizes countercurrent flow.
4. according to the recoverying and utilizing method of smelting non-ferrous metal fume afterheat claimed in claim 1 and dust, it is characterized in that step 1., 3., 4. middle waste-heat recovery device countercurrent flow waste heat boiler A(1), countercurrent flow waste heat boiler B(3) and the heat exchange of reclaiming between working medium of countercurrent flow waste heat boiler working medium preheater (4) flue gas and boiler afterheat all adopt two bushing type countercurrent heat exchange methods. the heat-exchanger rig two straight tubes suit configurations different by several diameters constitute, flue gas is walked central tube, waste heat recovery working medium is walked the annular space pipe, the two flow direction is contrary, realize countercurrent flow.
5. according to the recoverying and utilizing method of smelting non-ferrous metal fume afterheat claimed in claim 1 and dust, it is characterized in that step 1., 3., 4. the waste-heat recovery device countercurrent flow waste heat boiler A(1 adopted in), countercurrent flow waste heat boiler B(3) and the heat exchange between countercurrent flow waste heat boiler working medium preheater (4) flue gas and boiler working substance all adopt three bushing type countercurrent heat exchange methods, the heat-exchanger rig three straight tube suit configurations different by diameter form, flue gas is walked central tube and outer annular space, waste heat recovery working medium is walked interior annular space pipe, the two flow direction is contrary, realize countercurrent flow.
6. according to the recoverying and utilizing method of smelting non-ferrous metal fume afterheat claimed in claim 1 and dust, it is characterized in that step is 1., 3., adopt waste-heat recovery device countercurrent flow waste heat boiler A(1 in 4.) flue gas all adopts pair bushing type countercurrent heat exchange methods with the heat exchange that boiler afterheat reclaims between working medium; Countercurrent flow waste heat boiler B(3) and the heat exchange between countercurrent flow waste heat boiler working medium preheater (4) flue gas and boiler working substance adopt three bushing type countercurrent heat exchange methods.
7. according to the recoverying and utilizing method of smelting non-ferrous metal fume afterheat claimed in claim 1 and dust, it is characterized in that 5. chip runner back flow of gas heat exchanger (5) of step, by many groups runner sheet heat exchange unit, formed, every group of runner sheet heat exchange unit is comprised of the runner sheet A and the runner sheet B that link together by shared heat exchanger plates, the upper end of the side of runner sheet A has the runner entrance, and another relative lower end, side has runner exit; The lower end of the side of runner sheet B has the runner entrance, and another relative upper end, side has runner exit; Flue gas and air by runner sheet A or runner sheet B, are realized countercurrent flow respectively.
8. according to the recoverying and utilizing method of smelting non-ferrous metal fume afterheat claimed in claim 1 and dust, it is characterized in that waste heat that the flue gas during smelting of described flue-gas temperature≤1000 ℃ carries and the recoverying and utilizing method of dust, described step is 3.. and the waste heat secondary recovery, saving need not.
9. according to the recoverying and utilizing method of smelting non-ferrous metal fume afterheat claimed in claim 1 and dust, the working medium that it is characterized in that described waste heat boiler working medium or waste heat boiler working medium preheater is water or low boiling organic working medium.
10. the application of the recoverying and utilizing method of smelting non-ferrous metal fume afterheat claimed in claim 1 and dust, the waste heat that the flue gas that it is characterized in that being applicable to discharge in copper, nickel, lead, zinc smelting technology process units carries and the recycling of dust.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310401118.0A CN103471405B8 (en) | 2013-09-05 | The recoverying and utilizing method of smelting non-ferrous metal fume afterheat and dust | |
| PCT/CN2014/084226 WO2015032265A1 (en) | 2013-09-05 | 2014-08-13 | Method of recycling flue gas waste heat and dust in nonferrous metal smelting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310401118.0A CN103471405B8 (en) | 2013-09-05 | The recoverying and utilizing method of smelting non-ferrous metal fume afterheat and dust |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| CN103471405A true CN103471405A (en) | 2013-12-25 |
| CN103471405B CN103471405B (en) | 2016-03-30 |
| CN103471405B8 CN103471405B8 (en) | 2016-06-01 |
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| CN108499315A (en) * | 2018-04-02 | 2018-09-07 | 中电环保股份有限公司 | Integrated apparatus and method for removing non-ferrous metal metallurgy relieving haperacidity sulfureous in flue gas oxide and heavy metal |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2015032265A1 (en) | 2015-03-12 |
| CN103471405B (en) | 2016-03-30 |
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Effective date of registration: 20140618 Address after: 276037 Shandong city of Linyi province Lanshan Nanfang town of Qingnian Road No. 2 Applicant after: Shandong Jinsheng Non-Ferrous Group Co., Ltd. Applicant after: Eastern Copper Company Ltd. Address before: 276037 Shandong city of Linyi province Lanshan Nanfang town of Qingnian Road No. 2 Applicant before: Shandong Jinsheng Non-Ferrous Group Co., Ltd. |
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