CN206094933U - High -efficient waste heat utilization of oxide ore flash furnace tail gas and clean dust collecting system - Google Patents
High -efficient waste heat utilization of oxide ore flash furnace tail gas and clean dust collecting system Download PDFInfo
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- CN206094933U CN206094933U CN201621075973.2U CN201621075973U CN206094933U CN 206094933 U CN206094933 U CN 206094933U CN 201621075973 U CN201621075973 U CN 201621075973U CN 206094933 U CN206094933 U CN 206094933U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model provides a high -efficient waste heat utilization of oxide ore flash furnace tail gas and clean dust collecting system, include the oxide ore flash furnace, exhaust -heat boiler, dust removal subassembly, first draught fan, gas boiler, air heater, second draught fan and the chimney that communicate in proper order through the tail gas pipeline, exhaust -heat boiler, dust removal subassembly, first draught fan, second draught fan and chimney all are equipped with flue gas inlet and flue gas gas outlet, gas boiler is last except being equipped with flue gas inlet and flue gas gas outlet, still is equipped with air inlet in addition, air heater is last except being equipped with flue gas entry, exhanst gas outlet, still is equipped with a pair of air inlet and air outlet in addition, air heater's air outlet pass through the pipeline with gas boiler's air inlet links to each other. High -efficient waste heat utilization of oxide ore flash furnace tail gas and clean dust collecting system, can realize oxide ore flash furnace high temperature, high dust -laden, the high efficient handling who contains in CO's the flue gas thermal abundant recovery and dust.
Description
Technical field
The utility model belongs to fume afterheat and utilizes technical field, efficient more particularly, to a kind of oxide ore flash furnace exhaust gas
UTILIZATION OF VESIDUAL HEAT IN and cleaning dust collecting system.
Background technology
Oxide ore Flash Smelting Furnace is used for metal smelting oxide ore, for example：Iron ore, lateritic nickel ore, iron and steel flue dust (containing zinc oxide)
Deng, cardinal principle be using breeze specific surface area it is big, at high temperature with the fireballing feature of gas reaction, in space with reduction
Atmosphere reduces metal oxide to be smelted.At home, it is contemplated that the factor such as the cost of raw material and source, reducing atmosphere typically leads to
Cross the reaction of coal oxygen to manufacture.Oxide ore Flash Smelting Furnace is flue gas continuous-stable the characteristics of going out kiln gas, and temperature is up to 1200-1600
DEG C, dust content is up to 6-10%, and the volume ratio containing CO is usually more than 40% in flue gas.Have simultaneously so high dust content,
The flue gas of such high temperature and CO concentration, peerless in industrial circle, how sufficiently effective recycling is therein
Sensible heat and chemical energy, neither waste secondary energy sources, can make that flue gas does not produce new pollutant in processing procedure and environmental protection reaches again
Mark discharge, while and can as far as possible reduce investment, simplification of flowsheet, it is a great difficult problem to accomplish that this three takes into account, and is existed at present
Also similar tail gas is not successfully processed precedent in industrial production.
The content of the invention
In view of this, the utility model is directed to a kind of oxide ore flash furnace exhaust gas efficient waste heat utilization and cleaning is gathered dust
System, with solve current oxide ore Flash Smelting Furnace high temperature, high dust-laden, the high flue gas containing CO be difficult to effectively to recover energy and clean it is up to standard
A difficult problem for discharge.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in：
Oxide ore flash furnace exhaust gas efficient waste heat is utilized and cleans dust collecting system, including what is be sequentially communicated by exhaust pipe
Oxide ore Flash Smelting Furnace, waste heat boiler, dedusting component, the first air-introduced machine, gas fired-boiler, air preheater, the second air-introduced machine and cigarette
Cylinder；
The oxide ore Flash Smelting Furnace is provided with exhanst gas outlet；The waste heat boiler, dedusting component, the first air-introduced machine, second
Air-introduced machine and chimney are equipped with smoke air inlet and flue gas gas outlet；Except being provided with smoke air inlet and cigarette on the gas fired-boiler
Outside gas gas outlet, air intake is also additionally provided with；Except being provided with smoke inlet, exhanst gas outlet on the air preheater, also separately set
There are a pair of air intakes and air outlet slit；The air outlet slit of the air preheater passes through the air of pipeline and the gas fired-boiler
Entrance is connected.
Up to 1200-1600 DEG C of flue gas enters waste heat boiler from the offgas outlet of oxide ore Flash Smelting Furnace, because in flue gas
Water content is few, and sulfur content is extremely low, and the dew point of flue gas is relatively low, thus can directly be cooled to 140-200 DEG C by waste heat boiler, and produces
Raw steam is used to generate electricity, while rough dusting, the flue dust that waste heat boiler is collected can return Flash Smelting Furnace batch bin.Additionally, passing through
Waste heat boiler disposably cools to less than 200 DEG C of setting, and the effective waste heat in flue gas can be made full use of to produce steam, it is to avoid
The waste of sensible heat, meanwhile, after temperature drop, configuration requirement of the equipment such as follow-up air-introduced machine and deduster to the heatproof rank that works
Will decline, greatly save investment.
Dedusting component can to the further dedusting of flue gas, make in flue gas except dust quantity meets discharge standard, flue gas enters after dedusting
Enter the first air-introduced machine, the first air-introduced machine is used for the pump drainage of flue gas and overcomes SR, realizes micro- required for Flash Smelting Furnace space
Negative pressure smelts environment.Additionally, dedusting component is arranged in before the equipment such as the first air-introduced machine, the high dust content in flue gas can be avoided
Affect the service life of follow-up equipment.
The setting of gas fired-boiler is due to containing a large amount of CO and H in flue gas2Deng fuel gas, by the sky for introducing abundance
Gas, makes CO and H in flue gas2Deng fuel gas in gas fired-boiler after-flame, while produce steam.The heat exchange of gas-fired boiler inner flue gas of the stove
Efficiency is higher, and flue-gas temperature can be controlled in less than 200 DEG C when coming out of the stove.Flue gas reenters gas fired-boiler burning Jing after waste heat boiler cooling
Setting, relative to existing burning and the combustion again that is integrated of cooling or reheat-type waste heat boiler, 1200-1600 can be avoided
DEG C high-temperature flue gas after combustion temperature it is further up to body of heater cause damage, and then affect waste heat boiler service life.
Flue gas after gas fired-boiler, also more than 140 DEG C of temperature, the more difficult recovery of heat ratio of this part, if directly
Discharge, then can waste heat energy.The utility model arranges air preheater in gas fired-boiler smoke outlet, makes from gas fired-boiler to go out
The flue gas for coming makes the normal temperature air temperature bring up to 50 DEG C through air preheater, heating into the normal temperature air of gas fired-boiler
More than, so as to improve the efficiency of combustion of gas fired-boiler.The flue gas cool-down to less than 120 DEG C Jing after air preheater.
The flowing that second air-introduced machine is flue gas in gas fired-boiler and air preheater provides power, and flue gas draws through second
Discharge into chimney after blower fan.
Further, in the dedusting component heavy dirt room, electrostatic precipitator, sack cleaner, cyclone dust collectors one or
It is multiple.The reason for dedusting component can be selected so is, because flue gas Jing waste heat boiler temperature is reduced to less than 200 DEG C,
Therefore the selection face of cleaner is relatively wide, the configuration level of equipment is required also than relatively low, dedusting component can be multistage dedusting
Equipment can also be single cleaner, can be one in heavy dirt room, electrostatic precipitator, sack cleaner, cyclone dust collectors
Or multiple collocation are used.
Further, the dedusting component is several heavy dirt rooms collocation electrostatic precipitator.
Further, it is provided with herringbone flue in the heavy dirt room；The quantity of the heavy dirt room is 2-4.
Further, it is provided with desulfurizer between the second air-introduced machine exhanst gas outlet and chimney smoke inlet.Set herein
Putting the purpose of desulfurizer is, when sulfur content is relatively low in flue gas, but when may exceed discharge standard, the device can remove flue gas
In sulphur, it is ensured that flue gas qualified discharge.If sulfur content in fuel is too low in fuel, this device can be saved.
Further, it is provided with desulfurizer between the dedusting component exhanst gas outlet and the first air-introduced machine smoke inlet.
Arranging the purpose of desulfurizer herein is, if sulfur content is higher in flue gas, more than discharge standard, but is not suitable for introducing relieving haperacidity stream
Journey, the device can remove the sulphur contained in flue gas, it is to avoid the high flue gas dew point of sulfur content is too low, corrode follow-up equipment.
Further, the desulfurizer is wet limestone-gypsum FGD device.
Further, denitrification apparatus are provided between the gas fired-boiler and air preheater.Denitrification apparatus are only in flue gas
Just arranged in the case that the nitrogen oxides that contains is exceeded, to remove flue gas in nitrogen oxides, make flue gas qualified discharge.
Further, the denitrification apparatus are SCR denitration device.
Relative to prior art, oxide ore flash furnace exhaust gas efficient waste heat described in the utility model is utilized and cleaning is gathered dust
System has the advantage that：
Oxide ore flash furnace exhaust gas efficient waste heat described in the utility model utilizes and cleans dust collecting system, by oxidation
Waste heat boiler is set after ore deposit Flash Smelting Furnace, the effective waste heat in flue gas can be made full use of to produce steam, it is to avoid the waste of sensible heat, together
When, chemical energy production steam during gas fired-boiler is set to make full use of flue gas, then low-temperature flue gas heat energy is realized by heat exchanger
Recycle, so that the energy in flash furnace exhaust gas obtains high efficiente callback utilization, accomplish substantially " eating dry bleeding ".
Oxide ore flash furnace exhaust gas efficient waste heat described in the utility model is utilized and cleans dust collecting system, by described remaining
Heat boiler, makes more than 1200 DEG C of high-temperature flue gas directly drop to less than 200 DEG C after coming out of the stove, so as to reduce the heatproof of follow-up equipment
Require, significantly reduce the one-time investment of equipment.To reach the requirement of above-mentioned falling temperature gradient, the waste heat boiler is according to engineering
Practical situations, may also be employed the mode of multi-stage boilers arranged in series.
Oxide ore flash furnace exhaust gas efficient waste heat described in the utility model is utilized and cleans dust collecting system, by waste heat pot
The configuration of stove and burning boiler, the combustion again being integrated relative to existing burning and cooling or reheat-type waste heat boiler, make sudden strain of a muscle
The first separating treatment mode burnt by gas fired-boiler again Jing after waste heat boiler cooling of fast furnace exhaust gas, it is to avoid 1200-1600 DEG C
High-temperature tail gas cause to damage after after combustion temperature is further up to waste heat boiler body of heater；Arrange air preheater heating to enter
The normal temperature air of gas fired-boiler, using air themperature more than 50 DEG C are brought up to, and are improved the efficiency of combustion of gas fired-boiler and are reclaimed profit
With the low temperature exhaust heat of flue gas.
Oxide ore flash furnace exhaust gas efficient waste heat described in the utility model utilizes and cleans dust collecting system reasonable in design, can
Realize the UTILIZATION OF VESIDUAL HEAT IN to oxide ore flash furnace exhaust gas and purification, both energy-conserving and environment-protective, the equipment that exhaust treatment system is reduced again
Investment.
Description of the drawings
The accompanying drawing for constituting a part of the present utility model is used for providing further understanding to of the present utility model, and this practicality is new
The schematic description and description of type is used to explain the utility model, does not constitute to improper restriction of the present utility model.
In accompanying drawing：
Fig. 1 is that the oxide ore flash furnace exhaust gas efficient waste heat described in the utility model embodiment 1 is utilized and cleaning is gathered dust and is
System rough schematic；
Fig. 2 is that the oxide ore flash furnace exhaust gas efficient waste heat described in the utility model embodiment 2 is utilized and cleaning is gathered dust and is
System rough schematic；
Fig. 3 is that the oxide ore flash furnace exhaust gas efficient waste heat described in the utility model embodiment 3 is utilized and cleaning is gathered dust and is
System rough schematic；
Fig. 4 is that the oxide ore flash furnace exhaust gas efficient waste heat described in the utility model embodiment 4 is utilized and cleaning is gathered dust and is
System rough schematic.
Description of reference numerals：
1- oxide ore Flash Smelting Furnaces；2- waste heat boilers；3- dedusting components；The air-introduced machines of 4- first；5- gas fired-boilers；6- air is pre-
Hot device；The air-introduced machines of 7- second；8- chimneys；9- desulfurizers；10- denitrification apparatus.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the utility model can
To be mutually combined.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " horizontal ", " on ", D score,
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward " is
Based on orientation shown in the drawings or position relationship, it is for only for ease of description the utility model and simplifies description, rather than indicates
Or the device or element of hint indication with specific orientation, with specific azimuth configuration and operation, therefore must not be understood that
It is to restriction of the present utility model.Additionally, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicating
Or hint relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, " first ", " second " etc. are defined
Feature can express or implicitly include one or more this feature.In description of the present utility model, unless separately
It is described, " multiple " are meant that two or more.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integratedly
Connection；Can be mechanically connected, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, can be by concrete condition understanding
State concrete meaning of the term in the utility model.
Below with reference to the accompanying drawings and in conjunction with the embodiments describing the utility model in detail.
Embodiment 1
As shown in figure 1, oxide ore flash furnace exhaust gas efficient waste heat is utilized and cleans dust collecting system, including by exhaust pipe
Oxide ore Flash Smelting Furnace 1, waste heat boiler 2, dedusting component 3, the first air-introduced machine 4, the gas fired-boiler 5, air preheater being sequentially communicated
6th, the second air-introduced machine 7 and chimney 8；
The oxide ore Flash Smelting Furnace 1 is provided with exhanst gas outlet；The waste heat boiler 2, dedusting component 3, the first air-introduced machine 4,
Second air-introduced machine 7 and chimney 8 are equipped with smoke air inlet and flue gas gas outlet；Enter except being provided with flue gas on the gas fired-boiler 5
Outside gas port and flue gas gas outlet, air intake is also additionally provided with；Go out except being provided with smoke inlet, flue gas on the air preheater 6
Mouthful, also it is additionally provided with a pair of air intakes and air outlet slit；The air outlet slit of the air preheater 6 is by pipeline and the combustion gas
The air intake of boiler 5 is connected.
The dedusting component 3 is several heavy dirt rooms collocation electrostatic precipitator.
Herringbone flue is provided with the heavy dirt room；The quantity of the heavy dirt room is 2.
The course of work of the present embodiment is：
Up to 1200-1600 DEG C of flue gas enters described remaining from the uptake flue offgas outlet of the oxide ore Flash Smelting Furnace 1
Heat boiler 2, if water content is few in flue gas, sulfur content is extremely low, and the dew point of flue gas is relatively low, thus can be straight by the waste heat boiler 2
Connect and be cooled to 140-200 DEG C, and produce steam for generating electricity, while rough dusting is realized indirectly, what the waste heat boiler 2 was collected
Flue dust can return the batch bin of oxide ore Flash Smelting Furnace 1；Subsequently further dedusting is made to flue gas by the dedusting component 3,
The SR of flue gas transmission is overcome by the exhausting of first air-introduced machine 4, the tiny structure required for Flash Smelting Furnace space is realized
Smelt environment；Afterwards flue gas enters the gas fired-boiler 5, while introducing sufficient air enters gas fired-boiler 5, in making flue gas
Fuel gas after-flame；Then flue gas enters the air preheater 6, while normal temperature air is introduced in the air preheater 6,
So that in the air preheater 6, low-temperature flue gas are fully exchanged heat with normal temperature air, so that atmosphere temperature rising, afterwards will
Air through heating introduces the gas fired-boiler 5；And flue gas then enters second air-introduced machine 7, afterwards into the chimney 8
Discharge.
Embodiment 2
As shown in Fig. 2 on the basis of embodiment 1, if sulfur content is relatively low in flue gas, but more than discharge standard, can be in institute
State after the second air-introduced machine 7, the desulfurizer 9, the preferred wet limestone-gypsum FGD of the desulfurizer 9 are set before chimney 8
Device, removes sulfureous in flue gas, makes the flue gas can qualified discharge.
The course of work of the present embodiment is similar to Example 1, repeats no more.
Embodiment 3
As shown in figure 3, on the basis of embodiment 1, if sulfur content is higher in flue gas, more than discharge standard, but it is uncomfortable
Close and introduce relieving haperacidity flow process, the temperature that waste heat boiler 2 goes out kiln gas can be suitably adjusted, while drawing with first in the dedusting component 3
The desulfurizer 9 is set between blower fan 4, the sulphur contained in flue gas is removed, it is to avoid the high flue gas dew point of sulfur content is too low, in temperature
Corrosion follow-up fume treatment auxiliary is condensed when degree is reduced.
The course of work of the present embodiment is similar to Example 1, repeats no more.
Embodiment 4
As shown in figure 4, on the basis of embodiment 1, if the nitrogen oxides for containing in flue gas is exceeded, in the combustion gas
The low-temperature denitration device 10, the preferred SCR denitration of the denitrification apparatus 10 dress can be set after boiler 5, before air preheater 6
Put, to remove flue gas in nitrogen oxides.
The course of work of the present embodiment is similar to Example 1, repeats no more.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc. should be included in the utility model
Protection domain within.
Claims (9)
1. oxide ore flash furnace exhaust gas efficient waste heat utilizes and cleans dust collecting system, it is characterised in that：Including by exhaust pipe
The oxide ore Flash Smelting Furnace (1) that is sequentially communicated, waste heat boiler (2), dedusting component (3), the first air-introduced machine (4), gas fired-boiler (5),
Air preheater (6), the second air-introduced machine (7) and chimney (8)；
The oxide ore Flash Smelting Furnace (1) is provided with exhanst gas outlet；The waste heat boiler (2), dedusting component (3), the first air-introduced machine
(4), the second air-introduced machine (7) and chimney (8) are equipped with smoke air inlet and flue gas gas outlet；On the gas fired-boiler (5) except
It is provided with outside smoke air inlet and flue gas gas outlet, is also additionally provided with air intake；Except being provided with flue gas on the air preheater (6)
Entrance, exhanst gas outlet, are also additionally provided with a pair of air intakes and air outlet slit；The air outlet slit of the air preheater (6) passes through
Pipeline is connected with the air intake of the gas fired-boiler (5).
2. oxide ore flash furnace exhaust gas efficient waste heat according to claim 1 is utilized and cleans dust collecting system, and its feature exists
In：The dedusting component (3) in heavy dirt room, electrostatic precipitator, sack cleaner, cyclone dust collectors one or more.
3. oxide ore flash furnace exhaust gas efficient waste heat according to claim 2 is utilized and cleans dust collecting system, and its feature exists
In：The dedusting component (3) is several heavy dirt rooms collocation electrostatic precipitator.
4. oxide ore flash furnace exhaust gas efficient waste heat according to claim 3 is utilized and cleans dust collecting system, and its feature exists
In：Herringbone flue is provided with the heavy dirt room；The quantity of the heavy dirt room is 2-4.
5. oxide ore flash furnace exhaust gas efficient waste heat according to claim 1 is utilized and cleans dust collecting system, and its feature exists
In：Desulfurizer (9) is provided between second air-introduced machine (7) exhanst gas outlet and chimney (8) smoke inlet.
6. oxide ore flash furnace exhaust gas efficient waste heat according to claim 1 is utilized and cleans dust collecting system, and its feature exists
In：Desulfurizer (9) is provided between dedusting component (3) exhanst gas outlet and the first air-introduced machine (4) smoke inlet.
7. the oxide ore flash furnace exhaust gas efficient waste heat according to claim 5 or 6 utilizes and cleans dust collecting system, its feature
It is：The desulfurizer (9) is wet limestone-gypsum FGD device.
8. oxide ore flash furnace exhaust gas efficient waste heat according to claim 1 is utilized and cleans dust collecting system, and its feature exists
In：Denitrification apparatus (10) are provided between the gas fired-boiler (5) and air preheater (6).
9. oxide ore flash furnace exhaust gas efficient waste heat according to claim 8 is utilized and cleans dust collecting system, and its feature exists
In：The denitrification apparatus (10) are SCR denitration device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621075973.2U CN206094933U (en) | 2016-09-23 | 2016-09-23 | High -efficient waste heat utilization of oxide ore flash furnace tail gas and clean dust collecting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621075973.2U CN206094933U (en) | 2016-09-23 | 2016-09-23 | High -efficient waste heat utilization of oxide ore flash furnace tail gas and clean dust collecting system |
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| CN206094933U true CN206094933U (en) | 2017-04-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108607341A (en) * | 2018-04-19 | 2018-10-02 | 杨清海 | A kind of collaboration treatment process of sintering flue gas pollutant removing and Btu utilization |
| CN110926227A (en) * | 2019-12-09 | 2020-03-27 | 阳新鹏富矿业有限公司 | Smelting furnace smoke dust collecting and treating method |
-
2016
- 2016-09-23 CN CN201621075973.2U patent/CN206094933U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108607341A (en) * | 2018-04-19 | 2018-10-02 | 杨清海 | A kind of collaboration treatment process of sintering flue gas pollutant removing and Btu utilization |
| CN110926227A (en) * | 2019-12-09 | 2020-03-27 | 阳新鹏富矿业有限公司 | Smelting furnace smoke dust collecting and treating method |
| CN110926227B (en) * | 2019-12-09 | 2022-02-15 | 阳新鹏富矿业有限公司 | Smelting furnace smoke dust collecting and treating method |
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