CN110241284A - A kind of flue gas particles of steelmaking converter purification system and purification method again - Google Patents
A kind of flue gas particles of steelmaking converter purification system and purification method again Download PDFInfo
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- CN110241284A CN110241284A CN201910671826.3A CN201910671826A CN110241284A CN 110241284 A CN110241284 A CN 110241284A CN 201910671826 A CN201910671826 A CN 201910671826A CN 110241284 A CN110241284 A CN 110241284A
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- 238000000746 purification Methods 0.000 title claims abstract description 60
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000003546 flue gas Substances 0.000 title claims abstract description 57
- 238000009628 steelmaking Methods 0.000 title claims abstract description 43
- 239000002245 particle Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000007789 gas Substances 0.000 claims abstract description 102
- 230000007246 mechanism Effects 0.000 claims abstract description 42
- 239000000428 dust Substances 0.000 claims abstract description 21
- 241001313855 Bletilla Species 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 15
- 239000003034 coal gas Substances 0.000 claims description 10
- 238000002309 gasification Methods 0.000 claims description 10
- 238000011084 recovery Methods 0.000 claims description 10
- 238000004868 gas analysis Methods 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000013618 particulate matter Substances 0.000 claims description 3
- 235000019504 cigarettes Nutrition 0.000 abstract description 25
- 239000003245 coal Substances 0.000 abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- 239000001301 oxygen Substances 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000004064 recycling Methods 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010422 painting Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C2100/00—Exhaust gas
- C21C2100/02—Treatment of the exhaust gas
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a kind of flue gas particles of steelmaking converter purification system and purification methods again, including row pipeline outside steelmaking converter, once dust collection of converter mechanism and first gas, the purification system again further includes gas chamber and carries out the purification mechanism again that steam heat-exchanging takes off bletilla dedusting to the flue gas after the dedusting of once dust collection of converter mechanism, and gas chamber, again purification mechanism and the outer row pipeline of first gas are connect by shunting air delivering pipeline with the gas outlet of once dust collection of converter mechanism.The present invention to because it is unqualified cannot recycle, cigarette (coal) gas by chimney release carries out further purified treatment again, realize economic, efficient target.
Description
Technical field
The invention belongs to technical field of energy saving and environmental protection, and in particular to a kind of flue gas particles of steelmaking converter purify again is
System and purification method.
Background technique
With the sternness increasingly of environmentally friendly form, environment protection emission requires further harsh.With regard to cigarette of steel industry steelmaking converter
Aerated particle object discharge limit for, State Ministry of Environmental Protection put into effect " iron and steel enterprise's minimum discharge retrofit work scheme (consults on
Original text) " it requires: flue gas particles discharge limit of steelmaking converter will be by 50mg/Nm3Drop to 10mg/Nm3, and in the world most
Stringent discharge limit requirement, the whole nation is implemented before planning the year two thousand twenty, some environmentally sensitive areas have been put into effect and implemented at present
Corresponding minimum discharge provincial standard.
Since nineteen fifty-two oxygen steelmaking converter comes out, (converter is once removed for converter gas purification and coal-gas recovering technique
Dirt technique) it is the essential link of STEELMAKING PRODUCTION, take converter coal gas purification, recycling function.Flue gas of steelmaking converter
Grain object is the most important index for examining once dust collection of converter technology, present GB 28664-2012 " steel industry atmosphere pollution row
Put standard " in define a flue gas and refer to the coal gas that pneumatic steelmaking coal-gas recovering is diffused by unqualified cannot recycle, particulate matter row
Putting limit is 50mg/Nm3。
Currently, oxygen steelmaking once dust collection of converter technique mainly uses wet process (OG), dry method (LT), semidry method both at home and abroad,
It is derived mainly from Germany and Japan, the country has also carried out corresponding technical transform and production domesticization application.With regard to primary dedusting wet processing
For, flue gas particles discharge value generally can control in 50mg/Nm3Left and right；Dry method (LT), the discharge of semidry method flue gas particles
Value generally can control in 20mg/Nm3Left and right, is not able to satisfy 10mg/Nm3The requirement of minimum discharge limit.How using it is economical,
Efficient means realize flue gas particles minimum discharge target of steelmaking converter, are that domestic steel industry must face and be badly in need of
It solves the problems, such as.
Therefore, an a set of economic, efficient flue gas particles minimum discharge of steelmaking converter purification system and net again is established
Change method is significant.
Summary of the invention
Present invention seek to address that the technical problems existing in the prior art.For this purpose, the present invention provides a kind of steelmaking converter one
Secondary flue gas particles purification system and purification method again, it is therefore an objective to convenient for being purified again to discharged gas fume.
To achieve the goals above, the technical scheme adopted by the invention is as follows:
A kind of flue gas particles of steelmaking converter purification system again, including steelmaking converter, once dust collection of converter mechanism and
The outer row pipeline of first gas, the purification system again further include gas chamber and to the flue gas after the dedusting of once dust collection of converter mechanism into
Row steam heat-exchanging takes off the purification mechanism again of bletilla dedusting, and gas chamber, again purification mechanism and the outer row pipeline of first gas pass through shunting
Air delivering pipeline is connect with the gas outlet of once dust collection of converter mechanism.
The purification mechanism again includes heat exchanger and deduster, and the air inlet of heat exchanger by purifying pipeline and converter one again
The gas outlet of secondary dedusting mechanism connects, and the gas outlet of heat exchanger and the air inlet of deduster connect, the gas outlet of deduster and the
Two gas discharging piping connections.
For the pipeline that purifies again equipped with the first stop valve, the outer row pipeline of the second gas is equipped with the second stop valve.
The outer row pipeline of the first gas is connect with chimney with the outer row pipeline of second gas.
The once dust collection of converter mechanism includes sequentially connected gasification cooling flue, rough dedusting tower, refined dedusting mechanism, rotation
Wind dehydrator and air-introduced machine, the air inlet of the gasification cooling flue and the gas outlet of steelmaking converter connect, the outlet air of air-introduced machine
Mouth is connect with the air inlet for shunting air delivering pipeline.
The refined dedusting mechanism is venturi scrubber.
The air delivering pipeline that shunts includes shunting appendix and set on the triple valve shunted on appendix, the shunting gas transmission
Pipe includes shunting air inlet pipe, shunt recovery tube and shunting outer comb, and the air outlet of air-introduced machine is by shunting air inlet pipe and triple valve
Air inlet connection, gas chamber connects by shunting a gas outlet of recovery tube and triple valve, the outer row pipeline of first gas and
The outer row pipeline of second gas is connected by shunting another gas outlet of outer comb and triple valve.
The purification system again further includes set on the gas analysis instrument shunted in air inlet pipe.
The outer row pipeline of the first gas includes the first outer comb and the by-passing valve on the first outer comb.
The purification method of flue gas particles of steelmaking converter purification system again is the cigarette that first steelmaking converter is discharged
Gas is successively through rough dedusting tower removes grade particulate matter, refined dedusting removes micron particles object, after tornado evaporator dehydration, then leads to
It crosses air-introduced machine and divides two-way to export by triple valve the flue gas after dedusting: gas chamber being entered by flue all the way；Another way is divided again
The output of two branches: a branch accesses chimney by the outer row pipeline of first gas；Another branch purifies again through heat exchanger, deduster
Afterwards, chimney is accessed by row pipeline outside second gas.
Using selective end contamination control mode, the operation of once dust collection of converter systems stay, only to because it is unqualified cannot
Recycling, cigarette (coal) gas by chimney release carry out further purified treatment again, realize economic, efficient target.Main purpose: 1.
Selective end contamination control mode: only carrying out further purified treatment again to cigarette (coal) the gas pollutant Jing Guo chimney outlet,
Reach with strong points, economic, efficient purpose；2. purification system is designed according to field working conditions again: adapting to molecule, cigarette (coal) gas
Low temperature and water content relative superiority or inferiority high dust collection efficiency, constant resisting force such as take up little area at technologies and the working condition requirement；3. having de- contour painting energy: logical
Cigarette (coal) temperature degree that the vapor heat exchanger being equipped with improves outlet is crossed, realizes de- white effect.
Beneficial effects of the present invention: purification mechanism again of the invention guarantees that mechanical water completely vaporizes in flue gas, realizes simultaneously
Flue gas emission takes off contour painting energy, realizes that the further purification to micron particles object removes using deduster.The present invention is not to because
Qualification cannot recycle, cigarette (coal) gas by chimney release carries out further purified treatment again, realize economic, efficient target.
Detailed description of the invention
This specification includes the following drawings, and shown content is respectively:
Fig. 1 is purification system process flow chart of the invention.
In the figure, it is marked as
1- steelmaking converter；2- gasification cooling flue；3- rough dedusting tower；4- refined dedusting mechanism；5- tornado evaporator；6- cigarette
Road；7- air-introduced machine；8- gas analysis instrument；9- triple valve；10- gas chamber；11 chimneys；12- heat exchanger；13- deduster；14-
Preceding stop valve；Stop valve after 15-；16- by-passing valve；17- shunts air inlet pipe；18- shunts recovery tube；19- shunts outer comb.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to a specific embodiment of the invention further details of
Explanation, it is therefore an objective to those skilled in the art be helped to have more complete, accurate and deep reason to design of the invention, technical solution
Solution, and facilitate its implementation.It should be noted that term " on ", "lower", "front", "rear", "left", "right", "vertical", "inner",
The orientation or positional relationship of the instructions such as "outside" is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing this hair
Bright and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation
Construction and operation, therefore should not be understood as the limitation to invention.
As shown in Figure 1, a kind of flue gas particles of steelmaking converter purification system again, including steelmaking converter 1, converter are primary
The outer row pipeline of dedusting mechanism and first gas, purification system further includes gas chamber 10 and to the dedusting of once dust collection of converter mechanism again for this
Flue gas afterwards carries out the purification mechanism again that steam heat-exchanging takes off bletilla dedusting, gas chamber 10, again purification mechanism and first gas outlet
Pipeline is connect by shunting air delivering pipeline with the gas outlet of once dust collection of converter mechanism.The main mesh of once dust collection of converter recovery system
Be that the high temperature generated during oxygen furnace steel to converter, coal gas of converter dusty cool down, purify, recycle.It is net again
The setting for changing mechanism carries out further purified treatment again to cigarette (coal) the gas pollutant of outlet, reaches with strong points, economical, high
Imitate purpose.
Purification mechanism includes heat exchanger 12 and deduster 13 again, and the air inlet of heat exchanger 12 by purifying pipeline and converter again
The gas outlet of primary dedusting mechanism connects, and the gas outlet of heat exchanger 12 is connect with the air inlet of deduster 13, and deduster 13 goes out
Port and second gas outlet piping connection.Pipeline is purified again equipped with the first stop valve, the first stop valve is preceding stop valve 14,
The outer row pipeline of second gas is equipped with the second stop valve, and the second stop valve is rear stop valve 15.The outer row pipeline of first gas and the
Two gas discharging pipelines are connect with chimney, convenient for by treated, flue gas passes through chimney outlet.Specifically, outside first gas
Row pipeline includes the first outer comb and the by-passing valve 16 on the first outer comb.The outer row pipeline of second gas includes the second outlet
Pipe and the rear stop valve 15 on the second outer comb.
Once dust collection of converter mechanism includes sequentially connected gasification cooling flue 2, rough dedusting tower 3, refined dedusting mechanism 4, rotation
The air inlet of wind dehydrator 5 and air-introduced machine 7, gasification cooling flue 2 is connect with the gas outlet of steelmaking converter 1, the outlet air of air-introduced machine 7
Mouth is connect with the air inlet for shunting air delivering pipeline.Refined dedusting mechanism is preferably venturi scrubber.It is generated during oxygen furnace steel
High temperature, converter cigarette (coal) gas dusty be inhaled into the gasification cooling flue that inner wall is furnished with water cooling coil pipe, flue-gas temperature is by about
1600 DEG C are reduced to about 1000 DEG C；Into rough dedusting tower (spray column), is sprayed, is washed, cooled down by many (operating) water nozzles, milli
Scale particles object is flutterred by gravity catches sedimentation, and with washing water outlet, flue-gas temperature is reduced to about 65 DEG C by about 1000 DEG C, removes into essence
Dirt system (venturi scrubber), is controlled by venturi pressure difference, and the washing of micron particles object is flutterred in realization catches；Enter back into rotation
Wind dehydrator carries out centrifugation abjection to the mechanical water in flue gas using centrifugal principle, this tornado evaporator is interior equipped with atomization
Cooling system, that is, utilize low temperature purification water, by high-pressure nozzle atomizing spray into dehydrator in, cooled flue gas temperature to about 40 DEG C,
Playing reduces flue gas saturation moisture content, reduces flue gas operating condition volume (improving blower power output), further dedusting purpose；Whirlwind dehydration
The flue gas that device comes out enters frequency converting induced draft fan and extracts, is oriented to next process later.
Shunting air delivering pipeline includes shunting appendix and the triple valve 9 on shunting appendix, shunts appendix and includes
Air inlet pipe 17 is shunted, recovery tube 18 is shunted and shunts outer comb 19, the air outlet of air-introduced machine 7 is by shunting air inlet pipe 17 and threeway
The air inlet of valve 9 connects, and gas chamber 10 is connect by shunting recovery tube 18 with a gas outlet of triple valve 9, outside first gas
Row pipeline and the outer row pipeline of second gas are connect by shunting outer comb 19 with another gas outlet of triple valve 9.For the ease of
Component content after detection primary dedusting in gas shunts air inlet pipe 17 and is equipped with gas analysis instrument 8.Frequency converting induced draft fan is by cigarette
Gas divides two-way to export by triple valve: entering gas chamber all the way and collects, another way passes through chimney outlet.Triple valve control logic is logical
Before crossing it, the gas analysis instrument flue gas on-line analysis numerical value judgement arranged after frequency converting induced draft fan: 1. work as O2Content is greater than 1%
When, triple valve is located at chimney outlet state；2. triple valve is located at chimney outlet state when CO content is less than 30% (adjustable).
Composition and function in system are described in detail below:
Steelmaking converter: oxygen top-blown converter is the converter made steel by top oxygen blast, i.e., with spray gun high at the top of converter
Pressure oxygen is blown into furnace to strengthen steelmaking process and improve melting bath stirring.By furnace body and tilting system, oxygen rifle and oxygen system
Each section is constituted.High pressure oxygen in the carbon reaction process in molten iron in converter, generate about 1600 DEG C and contain high CO, dusty
Coal gas of converter, pass through once dust collection of converter recovery system absorption handle.
Gasification cooling flue: inner wall is furnished with water cooling coil pipe, high temperature, the cigarette dusty (coal gas) generated during bessemerizing
It is inhaled into, the cooling water in water cooling coil pipe is heated to generate steam, is collected utilization.
Rough dedusting tower: cylinder tower structure is sprayed by many (operating) water nozzles of inside arrangement, is washed, is cooled down, millimeter
Grade particles object is flutterred by gravity catches sedimentation, and with washing water outlet, flue-gas temperature is reduced to about 65 DEG C by about 1000 DEG C.
Tornado evaporator: centrifugation abjection is carried out to the mechanical water in flue gas using centrifugal principle.It is interior cold equipped with being atomized
But system utilizes low temperature purification water, sprayed into dehydrator by high-pressure nozzle atomizing, cooled flue gas temperature is to about 40 DEG C.
Flue: flue gas convey duct coupling (including in primary dedusting gas pipeline, the first outer comb, the second outer comb,
Air inlet pipe is shunted, recovery tube is shunted and shunts outer comb).
Frequency converting induced draft fan: flue gas conveys power source, using frequency control.
Gas analysis instrument: O in on-line analysis cigarette (coal) gas2And CO content, 1. work as O2When content is greater than 1%, threeway is controlled
Valve is located at chimney outlet (release) state；2. control triple valve is located at chimney (release) when CO content is less than 30% (adjustable)
Outlet state, other stages are located at gas chamber and collect (recycling) state.
Triple valve: coal gas passes through bis- tunnel Qi Fen, enters gas chamber all the way and collects, another way passes through chimney outlet.It is smooth all the way
When logical, another way is closed.
Gas chamber: gas chamber, which is collected, collects converter cigarette (coal) gas under (recycling) state.
Chimney: air-introduced machine pressure, conveying, guidance converter cigarette (coal) gas outlet are utilized.
Heat exchanger: utilizing about 200 DEG C of steam, using finned tube heating flue-gas temperature to about 60 DEG C, guarantees mechanical in flue gas
Water completely vaporizes, while realizing that flue gas emission takes off contour painting energy.
Deduster: filtrate uses sintered plate, and heatproof realizes that the further purification to micron particles object removes up to 100 DEG C,
Have nitrogen automatic back blow and pre-washing function.
Preceding stop valve: it opens when purification mechanism use, is cut off when deactivated again.
Stop valve afterwards: it opens when purification mechanism use, is cut off when deactivated again.
By-passing valve: purification mechanism is in use, cutting again.
As shown in Figure 1, the purification process of purification system: by steelmaking converter 1 cigarette (coal) gas pass through gasification cooling flue 2
Into rough dedusting tower 3, refined dedusting mechanism 4, tornado evaporator 5, frequency converting induced draft fan 7, frequency converting induced draft fan are sequentially entered by flue 6
7 discharge cigarette (coal) gas divide two tunnels to export by triple valve 9: a-road-through excessively flows back to closed tube 18 (flue) into gas chamber 10；Separately
Bifurcate output all the way: a branch accesses chimney 11 by the outer row pipeline (flue) of first gas, by-passing valve 16；Another branch
By purifying the outer row pipeline of pipeline (flue), preceding stop valve 14, heat exchanger 12, deduster 13, rear stop valve 15, second gas again
Access chimney 11.
Flue gas dust collecting system cigarette (coal) gas output of steelmaking converter divides two states: 1. recycling state: when real-time cigarette
O in (coal) gas2Less than 1% and when CO content is greater than 30% when (adjustable), cigarette (coal) gas is guided to coal gas by triple valve content
Cabinet is recycled；2. diffusing state: as O in real-time cigarette (coal) gas2When content is greater than 1% or CO content less than 30% (adjustable)
When, cigarette (coal) gas guides to flue dust by triple valve and carries out release discharge.
Purification system is intended to the state of diffusing to flue gas particles of this steelmaking converter again, allows dustiness about 50mg/Nm3Cigarette
(coal) gas not directly enters smoke stack emission, but passes through the purification systems again of the compositions such as heat exchanger, deduster further at purification
After reason, dustiness is reduced to 10mg/Nm3Within after, using smoke stack emission, to realizing minimum discharge target.
To realize that ultralow, de- white effect mainly controls following parameter: 1. in tornado evaporator equipped with atomization cooling system,
Low temperature purification water is utilized, is sprayed into dehydrator by high-pressure nozzle atomizing, cooled flue gas temperature makes from about 65 DEG C to about 40 DEG C
Saturated water content is by 160g/m in cigarette (coal) gas3It is reduced to 50g/m above3Left and right；2. heat exchanger utilizes about 200 DEG C of steam, use
Finned tube heating cigarette (coal) temperature degree is increased to about 60 DEG C from about 40 DEG C, guarantees that mechanical water completely vaporizes and in overheat in flue gas
State realizes that flue gas emission takes off contour painting energy；3. filtrate uses sintered plate in deduster, heatproof is realized up to 100 DEG C to micron order
The further purification removing of grain object, has nitrogen automatic back blow and pre-washing function.
Deduster blowback and pre-washing function use automatic control mode, automatically control with flue gas ash removal of former steelmaking converter
It is chain, periodical blowback and flushing are carried out when triple valve is in recycling state or frequency converting induced draft fan is in halted state.
The present invention is exemplarily described in conjunction with attached drawing above.Obviously, present invention specific implementation is not by above-mentioned side
The limitation of formula.As long as using the improvement for the various unsubstantialities that the inventive concept and technical scheme of the present invention carry out；Or not
It is improved, above-mentioned conception and technical scheme of the invention are directly applied into other occasions, in protection scope of the present invention
Within.
Claims (10)
1. a kind of flue gas particles of steelmaking converter purification system, including steelmaking converter, once dust collection of converter mechanism and again
One gas discharging pipeline, which is characterized in that the purification system again further includes gas chamber and to the dedusting of once dust collection of converter mechanism
Flue gas afterwards carries out the purification mechanism again that steam heat-exchanging takes off bletilla dedusting, gas chamber, again purification mechanism and the outer comb of first gas
Road is connect by shunting air delivering pipeline with the gas outlet of once dust collection of converter mechanism.
2. flue gas particles of steelmaking converter purification system again according to claim 1, which is characterized in that described to purify again
Mechanism includes heat exchanger and deduster, and the air inlet of heat exchanger passes through the gas outlet for purifying pipeline Yu once dust collection of converter mechanism again
Connection, the gas outlet of heat exchanger and the air inlet of deduster connect, the gas outlet of deduster and second gas outlet piping connection.
3. flue gas particles of steelmaking converter purification system again according to claim 2, which is characterized in that described to purify again
Pipeline is equipped with the first stop valve, and the outer row pipeline of the second gas is equipped with the second stop valve.
4. flue gas particles of steelmaking converter purification system again according to claim 2, which is characterized in that first gas
External row pipeline is connect with chimney with the outer row pipeline of second gas.
5. flue gas particles of steelmaking converter purification system again according to claim 1, which is characterized in that the converter one
Secondary dedusting mechanism includes sequentially connected gasification cooling flue, rough dedusting tower, refined dedusting mechanism, tornado evaporator and air-introduced machine,
The air inlet of the gasification cooling flue and the gas outlet of steelmaking converter connect, air outlet and the shunting air delivering pipeline of air-introduced machine
Air inlet connection.
6. flue gas particles of steelmaking converter purification system again according to claim 5, which is characterized in that the refined dedusting
Mechanism is venturi scrubber.
7. flue gas particles of steelmaking converter purification system again according to claim 5, which is characterized in that it is described shunt it is defeated
Air pipe include shunt appendix and set on shunt appendix on triple valve, the shuntings appendix include shunting air inlet pipe,
It shunts recovery tube and shunts outer comb, the air outlet of air-introduced machine is connected by shunting the air inlet of air inlet pipe and triple valve, coal gas
Cabinet is connected by shunting a gas outlet of recovery tube and triple valve, and the outer row pipeline of first gas and the outer row pipeline of second gas are logical
Cross another gas outlet connection for shunting outlet pipe and triple valve.
8. flue gas particles of steelmaking converter purification system again according to claim 7, which is characterized in that described to purify again
System further includes set on the gas analysis instrument shunted in air inlet pipe.
9. flue gas particles of steelmaking converter purification system again according to claim 1, which is characterized in that first gas
External row pipeline includes the first outer comb and the by-passing valve on the first outer comb.
10. the purification method of any one of -9 described flue gas particles of steelmaking converter purification system again according to claim 1,
Be characterized in that, the purification method be first by steelmaking converter discharge flue gas successively through rough dedusting tower remove grade particulate matter,
After refined dedusting removes micron particles object, tornado evaporator dehydration, then passes through air-introduced machine and the flue gas after dedusting is passed through into triple valve
Divide two-way output: gas chamber being entered by flue all the way；Another way bifurcates output again: a branch passes through first gas outlet
Pipeline accesses chimney；Another branch accesses chimney after heat exchanger, deduster purify again, through row pipeline outside second gas.
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