CN207760375U - Converter gas dry dedusting waste heat recovery system - Google Patents
Converter gas dry dedusting waste heat recovery system Download PDFInfo
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- CN207760375U CN207760375U CN201721769503.0U CN201721769503U CN207760375U CN 207760375 U CN207760375 U CN 207760375U CN 201721769503 U CN201721769503 U CN 201721769503U CN 207760375 U CN207760375 U CN 207760375U
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- 239000002918 waste heat Substances 0.000 title claims abstract description 78
- 239000007789 gas Substances 0.000 title claims abstract description 48
- 238000011084 recovery Methods 0.000 title claims abstract description 29
- 239000003034 coal gas Substances 0.000 claims abstract description 71
- 239000000428 dust Substances 0.000 claims abstract description 25
- 239000000779 smoke Substances 0.000 claims description 45
- 238000006243 chemical reaction Methods 0.000 claims description 38
- 238000001816 cooling Methods 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 28
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 23
- 239000003546 flue gas Substances 0.000 claims description 23
- 238000002309 gasification Methods 0.000 claims description 20
- 239000000919 ceramic Substances 0.000 claims description 17
- 239000000498 cooling water Substances 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 12
- 238000004146 energy storage Methods 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 abstract description 11
- 238000001035 drying Methods 0.000 abstract description 10
- 239000000126 substance Substances 0.000 abstract description 9
- 238000004880 explosion Methods 0.000 abstract description 7
- 238000013022 venting Methods 0.000 abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 15
- 239000001301 oxygen Substances 0.000 description 15
- 229910052760 oxygen Inorganic materials 0.000 description 15
- 238000004064 recycling Methods 0.000 description 15
- 238000009628 steelmaking Methods 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 8
- 230000001590 oxidative effect Effects 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 7
- 239000002184 metal Substances 0.000 description 6
- 238000007664 blowing Methods 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000010079 rubber tapping Methods 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 239000012717 electrostatic precipitator Substances 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005108 dry cleaning Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model discloses a converter coal gas dry process dust removal waste heat recovery system, including gas filter (3), chemical chain combustion apparatus (6) and exhaust-heat boiler (7), chemical chain combustion apparatus (6) contain chemical chain combustion reaction device (600), the export of gas filter (3) is through the entry linkage of first exhaust duct (611) with chemical chain combustion reaction device (600), the export of chemical chain combustion reaction device (600) is through the first entry linkage of second exhaust duct (612) with exhaust-heat boiler (7), chemical chain combustion reaction device (600) have recovery tube (621) in parallel. The dry dedusting waste heat recovery system for the converter gas can realize the recovery of sensible heat energy of the converter gas at the temperature of below 900 ℃, realize zero emission of the converter gas, does not need to arrange an explosion venting valve, and can discontinuously treat the converter gas to realize continuous energy supply.
Description
Technical field
The utility model is related to off-gas recoveries to utilize technical field, and particularly a kind of dry dedusting of converter waste heat returns
Receipts system.
Background technology
Under normal circumstances, the pneumatic steelmaking period is 36 minutes, and oxygen blow duration is 15 minutes, this has a large amount of height in the process
The high ash-laden gas of temperature generates, and flue-gas temperature is 1500 DEG C~1600 DEG C, and dust main component is FeO, Fe2O3, CaO and SiO2Deng,
Dustiness reaches 80g/m3~150g/m3。
Since coal gas of converter intermittence generates, while having the characteristics that the high dust-laden of high temperature so that the dedusting of coal gas of converter and
Waste heat recovery is relatively difficult.In terms of dedusting, the dedusting technology of existing converter emission coal gas is broadly divided into wet method dedusting system and does
Method dust pelletizing system.
Wet method dedusting system is mainly made of parts such as flue gas cooling, purification, coal-gas recovering and sewage disposals.Wet dedusting
System has the disadvantage that：One, efficiency of dust collection is low, and treated, and gas content is about 50~100mg/Nm3；Two, system resistance damage
Greatly, operating cost is high；Three, there are secondary pollutions, have a large amount of sewage generation to need to handle；Four, it takes up a large area.Dry method dust
System is mainly made of the part such as gasification cooling stack, steam generator, electrostatic precipitator, compared with wet method dedusting system, tool
It has a clear superiority.One, high dust collection efficiency, dust content can be down to 5~15mg/Nm3；Two, small, operating cost is damaged in system resistance
It is low；Three, non-secondary pollution, no sewage generate, and recycling dust can be utilized directly；Four, floor space is small, convenient for management and safeguards.
The shortcoming of dry-dedusting system is essentially consisted in there are hidden peril of explosion, needs to install explosion venting valve, and big explosion is possible to super
It crosses the tolerance range of electrostatic precipitator explosion venting valve and demolishs electrostatic precipitator.
In terms of waste heat recovery, above-mentioned wet method dedusting system and dry-dedusting system are not recycled effectively.Especially
To 900 DEG C of the coal gas of converter sensible heat energy below through cooling stack output of gasifying.The dry method dust waste heat recovery of ceramic filter
System can solve the problems, such as this, and the coal gas of converter exported from gasification cooling stack enters ceramic filter and is dusted, through dedusting
Purified coal gas of converter enters waste heat boiler and utilizes its sensible heat.However, because the generation of coal gas of converter has the period
Property, ceramic filter dry-dedusting system and afterheat boiler system can only be interrupted use, i.e., have converter within the Converter Oxigen Blowing period
Coal gas uses when generating, it cannot be guaranteed that the continuity of energy supply.Meanwhile as coal gas of converter O2Recycling is not met with CO contents to require
When, it need to be diffused, the chemical energy of this segment converter coal gas can not be used, will also result in the pollution of environment.
Explanation of nouns：
Oxygen carrier：In burning chemistry chains reaction, the soild oxide for transmitting oxygen is known as oxygen carrier.Mainly there is Cu
The oxygen carriers such as base, Ni bases, Fe bases, Ca bases.By taking Cu base load oxysomes as an example, generally CuO is active component, with Al2O3、SiO2Deng
It is prepared for inert carrier.
Utility model content
The problem of for above-mentioned energy supply discontinuity, the utility model provide a kind of dry dedusting of converter waste heat time
Receipts system, the dry dedusting of converter residual neat recovering system can realize the recycling of 900 DEG C of following temperature sensible heats energy of coal gas of converter,
Realize zero diffusing for coal gas of converter, it is not necessary that explosion venting valve is arranged, can the processing coal gas of converter of discontinuity realize continuous energy supply.
Technical solution adopted by the utility model to solve its technical problems is：A kind of dry dedusting of converter waste heat time
Receipts system, including smoke filter, burning chemistry chains equipment and waste heat boiler, it is anti-that burning chemistry chains equipment contains burning chemistry chains
Device, the outlet of smoke filter is answered to be connect with the entrance of burning chemistry chains reaction unit by first exhaust pipeline, chemical chain
The outlet of combustion reaction device is connected by the first entrance of second exhaust pipeline and waste heat boiler, smoke filter and waste heat pot
Recovery channel is additionally provided between stove, recovery channel is arranged in parallel with burning chemistry chains reaction unit.
First exhaust pipeline is equipped with triple valve, and triple valve is containing there are one entrance and two outlets, the entrances of recovery channel
End is connect with the one outlet of triple valve, and the outlet end of recovery channel and the second entrance of waste heat boiler connect.
Flue gas analyzer is additionally provided on first exhaust pipeline, flue gas analyzer between smoke filter and triple valve,
The arrival end of smoke filter is externally connected with can be to gasification cooling stack that flue gas cools down.
Gasification cooling stack is connected with energy storage device, which can store the heat of flue gas in gasification cooling stack
Amount, gasification cooling stack is interior to be equipped with ultrasonic wave deashing device, and smoke filter is ceramic smoke filter, burning chemistry chains reaction
Device is externally provided with cooling water jecket.
Burning chemistry chains equipment also contains third discharge duct and the 4th discharge duct, and the entrance of third discharge duct connects
There are air blower, the outlet of third discharge duct to be connect with the outlet of burning chemistry chains reaction unit, the 4th discharge duct enters
Mouth is connect with the entrance of burning chemistry chains reaction unit, and the outlet of the 4th discharge duct and the first entrance of waste heat boiler connect.
First exhaust pipeline is equipped with the first valve, and second exhaust pipeline is equipped with the second valve, on third discharge duct
Equipped with third valve, the 4th discharge duct is equipped with the 4th valve.
The dry dedusting of converter residual neat recovering system further includes gas cooler, gas holder and diffusing tower, waste heat pot
The first outlet of stove is connect by the first smoke discharging pipe with diffusing tower, the second outlet of waste heat boiler by the second smoke discharging pipe with
The entrance of gas cooler connects, and the outlet of gas cooler is connected by the entrance of third smoke discharging pipe and gas holder.
The utility model has the beneficial effects that：The dry dedusting of converter residual neat recovering system uses burning chemistry chains
Reaction unit, the coal gas of converter that ingredient can be not achieved to recycling standard are handled, and using ceramic filter, can efficiently be gone
Except the dust in coal gas of converter.This system and technique can recycle 900 DEG C of coal gas of converter sensible heat below can be with emission coal gas
Chemical energy is that a kind of high dust collection efficiency, operation energy consumption are few, and the new dry method dust waste heat of coal gas total heat recovery and coal gas zero-emission returns
Receipts system and technique.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide a further understanding of the present invention, this practicality
Novel illustrative embodiments and their description are not constituted improper limits to the present invention for explaining the utility model.
Fig. 1 is the structural schematic diagram of dry dedusting of converter residual neat recovering system described in the utility model.
Fig. 2 is the inner tubular structure schematic diagram of waste heat boiler.
1, converter；2, gasify cooling stack；3, smoke filter；4, flue gas analyzer；5, triple valve；6, burning chemistry chains
Equipment；7, waste heat boiler；8, gas cooler；9, gas holder；10, diffusing tower；
501, the first solenoid valve；502, second solenoid valve；
600, burning chemistry chains reaction unit；601, the first valve；602, the second valve；603, third valve；604,
Four valves；605, air blower；606, cooling water jecket；
611, first exhaust pipeline；612, second exhaust pipeline；613, third discharge duct；614, the 4th discharge duct；
621, recovery channel；
701, the first smoke discharging pipe；702, the second smoke discharging pipe；703, third smoke discharging pipe.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
A kind of dry dedusting of converter residual neat recovering system, including smoke filter 3, burning chemistry chains equipment 6 and remaining
Heat boiler 7, burning chemistry chains equipment 6 contain burning chemistry chains reaction unit 600, and the outlet of smoke filter 3 passes through first row
Feed channel 611 is connect with the entrance of burning chemistry chains reaction unit 600, and the outlet of burning chemistry chains reaction unit 600 passes through
Two discharge ducts 612 are connect with the first entrance of waste heat boiler 7, and recovery tube is additionally provided between smoke filter 3 and waste heat boiler 7
Road 621, recovery channel 621 are arranged in parallel with burning chemistry chains reaction unit 600, as shown in Figure 1.
In the present embodiment, first exhaust pipeline 611 is equipped with triple valve 5, and triple valve 5 is containing there are one entrances and two to go out
Mouthful, the arrival end of recovery channel 621 is connect with the one outlet of triple valve 5, and the one outlet of triple valve 5 is equipped with second solenoid valve
502, the outlet end of recovery channel 621 is connect with the second entrance of waste heat boiler 7, the entrance of burning chemistry chains reaction unit 600
It can be equipped with the first solenoid valve 501, smoke filter with another outlet of triple valve 5, another outlet of triple valve 5
3 outlet can be connected to the entrance of triple valve 5.Flue gas analyzer 4, flue gas analyzer 4 are additionally provided on first exhaust pipeline 611
Between smoke filter 3 and triple valve 5, flue gas analyzer 4 can analyze smoke filter 3 be discharged flue gas ingredient and
Content, the arrival end of smoke filter 3 is externally connected with can be to gasification cooling stack 2 that flue gas cools down.
In the present embodiment, the arrival end of gasification cooling stack 2 is located at the top of converter 1, is equipped in the cooling stack 2 that gasifies
Cooling water pipe, coal gas of converter initially enter gasification cooling stack 2, and the tube wall of coal gas of converter and flue is changed indirectly by cooling water
The cooling water pipe of heat, gasification cooling stack 2 is connected with energy storage device, which also connect with waste heat boiler 7, energy storage dress
The heat of flue gas in gasification cooling stack 2 can be stored by setting, which can store the heat of the absorption of waste heat boiler 7.Gas
Change and be additionally provided with ultrasonic wave deashing device in cooling stack 2, smoke filter 3 is ceramic smoke filter, burning chemistry chains reaction
Device 600 is externally provided with cooling water jecket 606.
Waste heat boiler 7 containing two entrances and two outlets, the first entrance of waste heat boiler 7 by the first interior conduit only with
The first outlet of waste heat boiler 7 is connected to, the second entrance of waste heat boiler 7 by the second interior conduit only with waste heat boiler 7 second
Outlet, i.e., from the first entrance of waste heat boiler 7 enter fluid can only from the first outlet of waste heat boiler 7 be discharged and cannot
It is discharged from the second outlet of waste heat boiler 7, the fluid entered from the second entrance of waste heat boiler 7 can only be from the of waste heat boiler 7
Two outlets are discharged and cannot be discharged from the first outlet of waste heat boiler 7, as shown in Figure 2.When coal gas of converter reaches recycling standard,
Recovery channel 621 is directly walked without burning chemistry chains reactor, is entered after the progress heat recovery of waste heat boiler 7 by second
Enter gas cooler 8 after smoke discharging pipe 702 and gas holder 9 stores coal gas.When recycling standard is not achieved, by chemistry
Chain combustion reactor is entered by second exhaust pipeline 612 in waste heat boiler 7, after being recycled to waste heat, passes through
One smoke discharging pipe 701, which enters in diffusing tower 10, to be discharged.
In the present embodiment, burning chemistry chains equipment 6 also contains third discharge duct 613 and the 4th discharge duct 614, the
The entrance of three discharge ducts 613 is connected with air blower 605, and dress is reacted in the outlet of third discharge duct 613 with burning chemistry chains
600 outlet connection is set, the entrance of the 4th discharge duct 614 is connect with the entrance of burning chemistry chains reaction unit 600, the 4th row
The outlet of feed channel 614 is connect with the first entrance of waste heat boiler 7, as shown in Figure 1.First exhaust pipeline 611 is equipped with first
Valve 601, second exhaust pipeline 612 are equipped with the second valve 602, and third discharge duct 613 is equipped with third valve 603, the
Four discharge ducts 614 are equipped with the 4th valve 604.First valve 601, the second valve 602, third valve 603 and the 4th valve
604 be solenoid valve.
In the present embodiment, the dry dedusting of converter residual neat recovering system further includes gas cooler 8, gas holder 9
It is connect with diffusing tower 10 by the first smoke discharging pipe 701 with the first outlet of diffusing tower 10, waste heat boiler 7, the of waste heat boiler 7
Two outlets are connect by the second smoke discharging pipe 702 with the entrance of gas cooler 8, and the outlet of gas cooler 8 is arranged by third
Smoke pipeline 703 is connect with the entrance of gas holder 9, as shown in Figure 1.
The course of work of each device in dry dedusting of converter residual neat recovering system described in the utility model is described below.
In pneumatic steelmaking, into converter 1, oxygen decarburization will generate a large amount of coal gas of converter.
When the coal gas of converter is by gasification cooling stack 2, which carries out heat exchange with the cooling water in flue,
Cooling water heat absorption simultaneously flashes to saturated vapor；The saturated vapor and waste heat boiler 7 that the gasification cooling stack 2 generates generate
Vapor export to steam energy storage device.
The coal gas of converter exported from gasification cooling stack 2 enters smoke filter 3 (ceramic filter) and is dusted；Flue gas
The dust that 3 dedusting of filter traps is sent to briquetting station through conveyer, is molded dust through hot pressing, and obtained powder agglomates is used for converter
Steel-making.The ceramic filter is dusted the coal gas of converter of dust-laden by sieving actoion, when the ceramic filter appearance
When area ash is excessive, dedusting resistance is excessive, reverse gas cleaning is carried out to it.
After coal gas of converter enters waste heat boiler 7, and the water indirect heat exchange in waste heat boiler 7, while in waste heat boiler 7
Vapor is formed after water heat absorption.
Coal gas of converter enters gas holder 9 after waste heat boiler cooling processing, after further cooling down into gas cooler 8 to carry out
Storage.Or coal gas of converter diffuses after waste heat boiler cooling processing into diffusing tower 10.
Metal oxygen carrier is filled in burning chemistry chains reaction unit 600.Metal oxygen carrier is Cu base loads oxysome or Fe bases
One or two kinds of mixture of oxygen carrier.Metal oxygen carrier as mentioned can be with Fe2O3For the Fe base load oxygen of principal component
Body and using CuO as the mixture of the Cu base load oxysomes of principal component；The quality of the Cu base load oxysomes accounts for the total matter of metal oxygen carrier
The 5%~20% of amount.Cooling water jecket 606 is provided in the outer housing of the burning chemistry chains reaction unit 600.
The adiabatic reaction Wen Sheng of metal oxygen carrier based on Fe base load oxysomes, oxidation reaction is very big, new in this practicality
In type, cooling water jecket 606 is added to burning chemistry chains reaction unit, for stablizing temperature of reactor, is risen violently to avoid temperature
And damage metal oxygen carrier.
Each device in dry dedusting of converter residual neat recovering system described in the utility model may be used existing
Device, such as burning chemistry chains reaction unit 600, gasification cooling stack 2, ultrasonic wave deashing device, cooling water jecket 606 and storage
Energy device etc..
A kind of converter coal gas dry-process purifying waste heat reclaiming process below.
The converter coal gas dry-process purifying waste heat reclaiming process is carried out at the same time with the pneumatic steelmaking period, the pneumatic steelmaking period
Contain the preparation stage, blowing stage and tapping stage being arranged in order, a converter coal gas dry-process purifying waste heat reclaiming process mistake
Journey and the three phases in the pneumatic steelmaking period correspond, and the converter coal gas dry-process purifying waste heat reclaiming process uses
The dry dedusting of converter residual neat recovering system stated, the converter coal gas dry-process purifying waste heat reclaiming process include following step
Suddenly：
Step 1, in the preparation stage, make be located at the arrival end of recovery channel 621 and entering for burning chemistry chains reaction unit 600
First exhaust pipeline 611 between mouthful is closed；
Step 2, in the blowing stage, judge whether the flue gas that smoke filter 3 is discharged reaches recycling standard, when can reach
When recycling standard, the flue gas that smoke filter 3 is discharged only enters waste heat boiler 7 by recovery channel 621；When recycling cannot be reached
When standard, the flue gas that smoke filter 3 is discharged only is entered by first exhaust pipeline 611 in burning chemistry chains reaction unit 600
Reduction reaction is concurrently given birth to, reducing gas product is discharged into waste heat by burning chemistry chains reaction unit 600 by second exhaust pipeline 612
Boiler 7；
Step 3, tapping the stage, make be located at the arrival end of recovery channel 621 and entering for burning chemistry chains reaction unit 600
First exhaust pipeline 611 between mouthful is closed.
In step 1 and step 3, chemically the outlet of chain combustion reaction device 600 is to burning chemistry chains reaction unit 600
It is inside blown into air, the air is in burning chemistry chains reaction unit 600 and occurs oxidation reaction, oxidizing gas product chemically chain
The entrance of combustion reaction device 600 escapes and enter waste heat boiler 7.The converter coal gas dry-process purifying waste heat reclaiming process can be realized
The recycling of 900 DEG C of following temperature sensible heats energy of coal gas of converter, realizes that the zero of coal gas of converter diffuses, it is not necessary that explosion venting valve is arranged, can be interrupted
Property processing coal gas of converter realize continuous energy supply.
Due to the three phases one of a converter coal gas dry-process purifying waste heat reclaiming process process and the pneumatic steelmaking period
One corresponds to, with moving in circles for pneumatic steelmaking period, the converter coal gas dry-process purifying waste heat reclaiming process also will accordingly according to
It is secondary to move in circles.
Converter coal gas dry-process purifying described in the utility model is discussed in detail for being below 36min by the pneumatic steelmaking period
Waste heat reclaiming process.
Assuming that the pneumatic steelmaking period be 36min, wherein 0min~10min be Primary period preparation stage, 10min~
26min is the blowing stage, and wherein 12min~24min is the coal-gas recovering stage, and 26min~36min is the tapping stage, then this turn
Producer gas dry cleaning waste heat reclaiming process process is as follows：
Step 1,0min~10min in the preparation stage, corresponding steel-making period 36min, no coal gas of converter generate, chemistry
Chain combustion reaction device 600 switches to oxidation reaction process, and the first solenoid valve 501 is closed, the first valve 601 and the second valve
602 close, and third valve 603 and the 4th valve 604 are opened, meanwhile, air blower 605 is opened.At this point, anti-in burning chemistry chains
It answers in device 600 and oxidation reaction occurs：
Cu+1/2O2=CuO △ H=-35.971kcal/mol
2Fe3O4+1/2O2=3Fe2O3△ H=-57.776kcal/mol
2FeO+1/2O2=Fe2O3△ H=-66.403kcal/mol
The temperature of the oxidation reaction is 900 DEG C~1000 DEG C, and oxidizing gas product is N2Into waste heat boiler 7, in waste heat
In boiler 7, oxidizing gas product and water indirect heat exchange, coal gas of converter temperature are reduced to 150 DEG C~200 DEG C, become after water heat absorption
Vapor enters steamdrum.Oxidizing gas product is emptied by diffusing tower 10.
Step 2,10min~26min in the blowing stage, corresponding steel-making period 36min, the oxygen decarburization in converter 1
A large amount of coal gas of converter thus is generated, the coal gas of converter temperature of output is about 1500 DEG C, and the coal gas of converter of high temperature dust is first
Into gasification cooling stack 2, the tube wall of coal gas of converter and flue, by cooling water indirect heat exchange, gas temperature is dropped by 1500 DEG C
To 900 DEG C, cooling water heat absorption flashes to saturated vapor.900 DEG C of coal gas of converter enters smoke filter 3 and is dusted.
Coal gas of converter after ceramic filter dedusting determines whether to reach recycling standard by flue gas analyzer 4, if
Reach the recycling standard (volume fraction or molar fraction of the volume fraction of CO or molar fraction >=35% and O2 in such as coal gas of converter
≤ 2%) 12min~24min periods in period 36min, i.e. coal-gas recovering stage, the recycling of triple valve 5, are generally made steel
The second solenoid valve 502 of side is opened, and the first solenoid valve 501 for diffusing side is closed, and the coal gas of converter that smoke filter 3 is discharged passes through
Recovery channel 621 is directly entered waste heat boiler 7, in waste heat boiler 7, coal gas of converter and water indirect heat exchange, and coal gas of converter temperature
It further decreases, until 150 DEG C~200 DEG C, become water vapour after water heat absorption and enters steamdrum.Later, coal gas of converter enters coal gas
In cooler 8, coal gas of converter is down to 70 DEG C from 150 DEG C~200 DEG C, is stored subsequently into gas holder 9.
If the recycling standard (body of CO in such as coal gas of converter cannot be reached by the coal gas of converter that smoke filter 3 is discharged
Volume fraction≤2% of fraction >=35% or O2) when, it generally blows in the preceding 2min in stage and in rear 2min, at this time three
The second solenoid valve 502 of the recycling side of port valve 5 is closed, and the first solenoid valve 501 for diffusing side is opened, the first valve 601 and second
Valve 602 is opened, and third valve 603 and the 4th valve 604 are closed, and coal gas of converter enters burning chemistry chains reaction unit 600.
In burning chemistry chains reaction unit 600, with metal oxide reduction reaction occurs for coal gas of converter：
3Fe2O3+ CO=2Fe3O4+CO2△ H=-9.768kcal/mol
Fe2O3+ CO=2FeO+CO2△ H=-1.163kcal/mol
CuO+CO=Cu+CO2△ H=-31.595kcal/mol
Reduction reaction temperature is 900 DEG C~1000 DEG C, reducing gas product CO2Into waste heat boiler 7, in waste heat boiler 7
In, reducing gas product and water indirect heat exchange, coal gas of converter temperature further decrease, until 150 DEG C~200 DEG C, become after water heat absorption
Enter steamdrum at vapor.Reducing gas product is emptied by diffusing tower 10.
Step 3,26min~36min in the tapping stage, corresponding steel-making period 36min, when no coal gas of converter generates,
Burning chemistry chains reaction unit 600 switches to oxidation reaction process, and the first solenoid valve 501 is closed, the first valve 601 and the second valve
Door 602 is closed, and third valve 603 and the 4th valve 604 are opened, meanwhile, air blower 605 is opened.At this point, in burning chemistry chains
Oxidation reaction occurs in reaction unit 600：
Cu+1/2O2=CuO △ H=-35.971kcal/mol
2Fe3O4+1/2O2=3Fe2O3△ H=-57.776kcal/mol
2FeO+1/2O2=Fe2O3△ H=-66.403kcal/mol
Oxidizing reaction temperature is 900 DEG C~1000 DEG C, and oxidizing gas product is N2Into waste heat boiler 7, in waste heat boiler 7
In, oxidizing gas product and water indirect heat exchange, coal gas of converter temperature are reduced to 150 DEG C~200 DEG C, become vapor after water heat absorption
Into steamdrum.Oxidizing gas product is emptied by diffusing tower 10.
Wherein, which is equipped with ultrasonic wave deashing device, to remove inner wall dust, improves changing for coal air-water
Hot coefficient increases amount of steam withdrawn.The vapor that the saturated vapor and waste heat boiler that the gasification cooling stack 2 generates generate
Output can be used for process for making, can also be used for heating to steam energy storage device.
Smoke filter 3 can be ceramic filter, which belongs to high temperature resistant dust collector, and ceramic filter is adopted
With pulse dust cleaning mode, up to 99.9%, ceramic filter is mainly dusted dust-laden coal gas by sieving actoion efficiency of dust collection.
When ceramic filter outer surface, dust stratification is excessive, when dedusting resistance is excessive, needs to carry out reverse gas cleaning to it.Ceramic filter uses
Pulse dust cleaning mode, air source are high temperature and pressure nitrogen.The dust of ceramic filter trapping is sent to briquetting station through conveyer, using heat
Dust compression moulding, molding powder agglomates can be directly used for pneumatic steelmaking by the mode of briquetting.
In addition, there is unknown place to may refer to Chinese patent CN 104388627A, it is March 4 2015 publication date, public
It opens《A kind of coal gas dust removal of converter method and system》.
The above, only specific embodiment of the utility model cannot limit the range that utility model is implemented, institute with it
With the displacement of its equivalent assemblies, or according to equivalent variations made by the utility model patent protection domain and modification, should all still fall within
The scope that this patent is covered.In addition, between technical characteristic and technical characteristic in the utility model, technical characteristic and technical solution
Between, between technical solution and technical solution use can be freely combined.
Claims (7)
1. a kind of dry dedusting of converter residual neat recovering system, which is characterized in that the dry dedusting of converter waste heat returns
Receipts system includes smoke filter (3), burning chemistry chains equipment (6) and waste heat boiler (7), and burning chemistry chains equipment (6) contains
The outlet of burning chemistry chains reaction unit (600), smoke filter (3) passes through first exhaust pipeline (611) and burning chemistry chains
The entrance of reaction unit (600) connects, the outlet of burning chemistry chains reaction unit (600) by second exhaust pipeline (612) with
The first entrance of waste heat boiler (7) connects, and recovery channel (621) is additionally provided between smoke filter (3) and waste heat boiler (7),
Recovery channel (621) is arranged in parallel with burning chemistry chains reaction unit (600).
2. dry dedusting of converter residual neat recovering system according to claim 1, which is characterized in that first exhaust pipeline
(611) be equipped with triple valve (5), triple valve (5) contain there are one entrance and two outlet, the arrival end of recovery channel (621) with
The one outlet of triple valve (5) connects, and the outlet end of recovery channel (621) is connect with the second entrance of waste heat boiler (7).
3. dry dedusting of converter residual neat recovering system according to claim 2, which is characterized in that first exhaust pipeline
(611) flue gas analyzer (4) is additionally provided on, flue gas analyzer (4) is located between smoke filter (3) and triple valve (5), flue gas
The arrival end of filter (3) is externally connected with can be to gasification cooling stack (2) that flue gas cools down.
4. dry dedusting of converter residual neat recovering system according to claim 3, which is characterized in that gasification cooling stack
(2) it is connected with energy storage device, which can store the heat of flue gas in gasification cooling stack (2), and gasify cooling stack
(2) ultrasonic wave deashing device is equipped in, smoke filter (3) is ceramic smoke filter, burning chemistry chains reaction unit (600)
It is externally provided with cooling water jecket (606).
5. dry dedusting of converter residual neat recovering system according to claim 1, which is characterized in that burning chemistry chains are set
Standby (6) also contain third discharge duct (613) and the 4th discharge duct (614), and the entrance of third discharge duct (613) is connected with
The outlet of air blower (605), third discharge duct (613) is connect with the outlet of burning chemistry chains reaction unit (600), and the 4th
The entrance of discharge duct (614) is connect with the entrance of burning chemistry chains reaction unit (600), and the 4th discharge duct (614) go out
Mouth is connect with the first entrance of waste heat boiler (7).
6. dry dedusting of converter residual neat recovering system according to claim 5, which is characterized in that first exhaust pipeline
(611) it is equipped with the first valve (601), second exhaust pipeline (612) is equipped with the second valve (602), third discharge duct
(613) it is equipped with third valve (603), the 4th discharge duct (614) is equipped with the 4th valve (604).
7. dry dedusting of converter residual neat recovering system according to claim 1, which is characterized in that the coal gas of converter
Dry method dust residual neat recovering system further includes gas cooler (8), gas holder (9) and diffusing tower (10), and the first of waste heat boiler (7)
Outlet is connect by the first smoke discharging pipe (701) with diffusing tower (10), and the second outlet of waste heat boiler (7) passes through the second smoke exhaust pipe
Road (702) is connect with the entrance of gas cooler (8), and the outlet of gas cooler (8) passes through third smoke discharging pipe (703) and gas
The entrance of cabinet (9) connects.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721769503.0U CN207760375U (en) | 2017-12-18 | 2017-12-18 | Converter gas dry dedusting waste heat recovery system |
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| CN201721769503.0U CN207760375U (en) | 2017-12-18 | 2017-12-18 | Converter gas dry dedusting waste heat recovery system |
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| CN207760375U true CN207760375U (en) | 2018-08-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107893143A (en) * | 2017-12-18 | 2018-04-10 | 北京京诚泽宇能源环保工程技术有限公司 | Converter gas dry dedusting waste heat recovery system and process |
| CN114058774A (en) * | 2021-11-10 | 2022-02-18 | 南京博纳能源环保科技有限公司 | Combustion system for recycling converter gas |
-
2017
- 2017-12-18 CN CN201721769503.0U patent/CN207760375U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107893143A (en) * | 2017-12-18 | 2018-04-10 | 北京京诚泽宇能源环保工程技术有限公司 | Converter gas dry dedusting waste heat recovery system and process |
| CN107893143B (en) * | 2017-12-18 | 2023-01-13 | 北京京诚泽宇能源环保工程技术有限公司 | Converter gas dry dedusting waste heat recovery system and process |
| CN114058774A (en) * | 2021-11-10 | 2022-02-18 | 南京博纳能源环保科技有限公司 | Combustion system for recycling converter gas |
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