CN109554538A - A kind of sintering method and device that can reduce solid fuel consumption amount and carbon emission - Google Patents
A kind of sintering method and device that can reduce solid fuel consumption amount and carbon emission Download PDFInfo
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Abstract
A kind of sintering method that can reduce solid fuel consumption amount and carbon emission: conventional to be laid with sinter bed；Sintering；The flue gas of generation is outer for the sintering of hot gas sintering section, extra discharge.Use device: being mainly made of sintering pallet, flue gas gathering tube, deduster, exhaust fan and smoke ejector, cooled material receiver, hot waste gas pipe, hot waste gas regulating valve, hot waste gas deduster and the cold regenerator of ring, blanking device, and sintering pallet is successively set since the sintering pallet head and is divided into hot gas sintering section, natural gas sintering stage and three sections of accumulation of heat sintering stage.The present invention can be under the premise of guaranteeing sintering process and sintered products quality stabilization and making full use of hot waste gas waste heat, pass through the bed of material Natural GasInjecting in the middle part of sintering pallet, its heat for supplementing the middle part bed of material lost because solid fuel reduces, solid fuel consumption is reduced, and then reduces the CO of discharge flue gas2Content at least 10%.
Description
Technical field
The present invention relates to a kind of sintering process and devices, and solid fuel consumption amount and carbon emission can be reduced by definitely belonging to
Sintering method and device.
Background technique
Steel industry is the rich and influential family of energy consumption and environmental pollution, and coal dosage accounts for 70% or more of the total dosage of China's energy,
The greenhouse gases CO of discharge2The 98% of the total pernicious gas amount of Zhan.And sintering is the important procedure in steel production, solid combustion
Consumption accounts for the 75%~80% of entire sintering process energy consumption.The greenhouse gases CO generated by solid fuel2Account for entire steel industry
10% or so.In addition, if solid fuel and air insufficient contact are also easy to generate toxic gas CO in sintering process, to environment
It pollutes, therefore reduce sintering solid fuel consumption and carbon emission also to become one of sintering urgent problem.
Traditional sintering process is: sinter mixture (Iron Ore Powder, fuel, is returned mine at flux) is equipped with amount of water,
Mixed, pelletize after be taped against on sintering machine；Afterwards under the draft effect of lower part bellows, a little fight from upper on bed of material surface and
Under be sintered reaction, under the action of fuel combustion in sinter bed generates high temperature, a series of physical occurs for mixture
Variation is learned, sinter is eventually become.
Sintering fuel used is anthracite or coke powder, and solid fuel is distributed in the bed of material in dispersed, and proportion typically constitutes from
Mixture total heavy 3% ~ 5%, burn provided by heat account for 90% or so of the total calorific requirement of sintering.In sintering flue gas
CO2Discharge amount and fuel dosage and fuel in fix carbon content and be proportional to, i.e., firing rate is bigger, fixed in fuel
Carbon content is higher, then CO2Discharge amount it is bigger.
Currently, the major measure for reducing sintering solid fuel consumption is to carry out hot gas sintering using the hot waste gas of sintering, lead to
Cross the hot waste gas introduced above cooler increases the temperature on bed of material top, such as to promote the gas flow temperature by sinter bed
Domestic Baosteel, Anshan iron and steel plant, Baogang etc. has been all made of hot air sintering technology, while reducing sintering solid fuel consumption, changes
It has been apt to the intensity of surface layer sinter, has played preferable effect.
But hot air sintering technology to reduce solid fuel consumption be it is limited, only to improve surface layer sinter intensity have
Certain effect, however the heat in sinter bed short transverse still relies on the solid fuel of adapted in sintering feed to mention
For.Solid fuel burns during the sintering process generates a large amount of " greenhouse gases " CO2If sintering process poor air permeability, solid combustion
Material and air insufficient contact, can also generate toxic gas CO, cause the carbon emission amount in sintering flue gas high, are current
The main problem that sintering environmental protection faces.
Summary of the invention
The invention reside in overcome the prior art there are solid fuel consumptions big, CO in the flue gas of discharge2The high deficiency of content,
There is provided it is a kind of can be under the premise of guaranteeing that sintering process and sintered products quality are stablized, moreover it is possible to reduce solid fuel consumption, in turn
Reduce the CO of discharge flue gas2The sintering method and device of content at least 10%.
Realize the measure of above-mentioned purpose:
A kind of sintering method that can reduce solid fuel consumption amount and carbon emission, step:
1) routinely it is laid with sinter bed；
2) it is sintered:
A, in the hot gas sintering section of sintering machine front end, heat-agglomerating is carried out to sintering feed jointly using solid fuel and hot waste gas；
It controls heatrejection and is not less than 200 DEG C；
The hot gas sintering section is since sintering device handpiece, and length accounts for the 40 ~ 50% of sintering pallet total length；
B, be set as natural gas sintering stage in the middle part of the trolley after hot gas sintering section, length account for sintering pallet total length 20 ~
25%；Increase in this section and sintering feed is heated using natural gas, the intake of natural gas reduces dosage to supplement solid fuel
After reduce heatAmount25 ~ 30% be principle；
C, remaining sintering pallet length is set as accumulation of heat sintering stage after natural gas sintering stage；The section still use exhausting heat accumulating type into
Row sintering；
3) for flue gas generated in sintering process, in addition to for the sintering of hot gas sintering section, extra flue gas then enters flue row
It puts.
A kind of device for the sintering method that can reduce solid fuel consumption amount and carbon emission, mainly by sintering pallet, with
The flue gas gathering tube of sintering pallet connection, deduster, exhaust fan and the smoke ejector installed on flue gas gathering tube, sintering board
The cooled material receiver that is arranged below vehicle, the hot waste gas pipe being connect with cooled material receiver, the hot waste gas installed on hot waste gas pipe
Regulating valve, hot waste gas deduster and the cold regenerator of ring, the blanking device connecting with sintering pallet head composition, are: will burn
Knot machine trolley, which is successively set since the sintering pallet head, is divided into hot gas sintering section, natural gas sintering stage and accumulation of heat sintering stage three
Section；
Hot gas sintering section is since sintering pallet head, and length accounts for the 40 ~ 50% of sintering pallet total length；Hot waste gas
Pipe is connected to hot gas sintering section；
After natural gas sintering stage is located at hot gas sintering section, length accounts for the 20 ~ 25% of sintering pallet total length；It is burnt in natural gas
Knot section is connected with natural gas tube, and natural gas tube is simultaneously connect with gas source；And security system, natural gas are housed on natural gas tube
Regulating valve, instrument check device；
Remaining sintering pallet length is accumulation of heat sintering stage.
It is: being at least connected with a natural gas branch pipe on natural gas tube, connects along natural gas sintering stage short transverse
Natural gas branch pipe, and natural gas adjusting valve is housed on natural gas branch pipe；Natural gas distribution valve is installed on natural gas tube.
It is: at least one hot waste gas branch pipe is connected on hot waste gas pipe, hot waste gas branch pipe is along hot gas sintering section height
Direction is uniformly distributed, and hot waste gas regulating valve is housed on hot waste gas branch pipe；Hot waste gas distributing valve is housed on hot waste gas pipe.
The present invention why by sintering pallet overall length from being spatially divided into three sections, i.e., since the sintering pallet head according to
Secondary set is divided into hot gas sintering section, natural gas sintering stage and accumulation of heat sintering stage, respectively corresponds the top bed of material of sintering, the middle part bed of material
With the lower part bed of material, and every section of length is defined, be due to the conventional sintering bed of material from short transverse heat on to
Under gradually rise, can be under conditions of solid fuel consumption reduces, according to hot in sinter bed short transverse by the measure
Unbalanced feature is measured, heat supplement targetedly is carried out to the lower top bed of material of heat and the middle part bed of material, makes bed of material height
The heat spent on direction maximizes equilibrium, improves the utilization efficiency of heat.
Compared with prior art, the present invention can be under the premise of guaranteeing that sintering process and sintered products quality are stablized, and fill
Divide using efficient, the clean natural gas of bed of material blowing in the middle part of sintering pallet under the premise of hot waste gas waste heat, is passed through, supplements
The heat of middle part bed of material lose because solid fuel reduces reduces solid fuel consumption, and then reduces the CO for discharging flue gas2
Content at least 10%.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of present invention process device；
In figure: 1-sintering pallet, 2-flue gas gathering tubes, 3-dedusters, 4-exhaust fans, 5-smoke ejectors, 6-cooleds
Material receiver, 7-hot waste gas pipes, 8-hot waste gas regulating valves, 9-hot waste gas dedusters, the cold regenerator of 10-rings, 11-blanking devices,
12-hot gas sintering sections, 13-natural gas sintering stages, 14-accumulation of heat sintering stages, 15-natural gas tubes, 16-gas sources, 17-
Security system, 18-natural gas adjusting valves, 19-instrument check devices, 20-natural gas branch pipes, 21-natural gas distribution valves,
22-hot waste gas branch pipes, 23-hot waste gas distributing valves.
Specific embodiment
The device of the invention is described in detail with reference to the accompanying drawing:
For a kind of device of sintering method that can reduce solid fuel consumption amount and carbon emission, mainly by sintering pallet 1, with
The flue gas gathering tube 2 of the connection of sintering pallet 1, is burnt deduster 3, exhaust fan 4 and the smoke ejector 5 installed on flue gas gathering tube 2
The cooled splicing vehicle 6 being arranged below knot machine trolley 1, the hot waste gas pipe 7, the hot waste gas Guan Shangan that are connect with cooled material receiver 6
The hot waste gas regulating valve 8 of dress, hot waste gas deduster 9 and ring cold regenerator 10, the blanking device 11 that is connect with 1 head of sintering pallet
Composition, is: sintering pallet 1 is successively set since the sintering pallet head be divided into hot gas sintering section 12, natural gas is burnt
Tie section 13 and 14 3 sections of accumulation of heat sintering stage；
Hot gas sintering section 12 is since 1 head of sintering pallet, and length accounts for the 40 ~ 50% of 1 total length of sintering pallet；Heat
Flue gas leading 7 is connected at hot gas sintering section 12 using welding or connector；
After natural gas sintering stage 13 is located at hot gas sintering section 12, length accounts for the 20 ~ 25% of 1 total length of sintering pallet；Natural
Gas sintering stage is connected with natural gas tube 15 using welding or connector, and natural gas tube 15 is simultaneously connect with gas source 16；And natural
Security system 17, natural gas adjusting valve 18, instrument check device 19 are housed on tracheae 15；
Remaining 1 length of sintering pallet is accumulation of heat sintering stage 14.
At least one natural gas branch pipe 20 is communicated with using welding manner on natural gas tube 15, along natural gas sintering stage 13
Short transverse welding or connector link natural gas branch pipe 20, and natural gas adjusting valve 18 is housed on natural gas branch pipe 20；In day
Natural gas distribution valve 21 is installed on right tracheae 15.
At least one hot waste gas branch pipe 22 is communicated with using welding manner on hot waste gas pipe 7, hot waste gas branch pipe 22 is along hot wind
12 short transverse of sintering stage is uniformly distributed, and hot waste gas regulating valve 8 is housed on hot waste gas branch pipe 22；Equipped with heat on hot waste gas pipe 7
Exhaust gas distributing valve 23.
Following embodiment of the method is all made of apparatus described above progress.
Embodiment 1
The present embodiment is with 220m2The mating 240m of sintering machine2The present invention will be described for ring cold machine, sintering pallet overall length
Degree is 55 meters；The solid fuel of the present embodiment is anthracite.
A kind of sintering method that can reduce solid fuel consumption amount and carbon emission, step:
1) routinely it is laid with sinter bed；
2) it is sintered:
A, in the hot gas sintering section 12 of sintering machine front end, heating burning is carried out to sintering feed jointly using solid fuel and hot waste gas
Knot；251 DEG C of heatrejection of control；
The hot gas sintering section 12 is to take its length to account for the 42% of sintering pallet total length since sintering device handpiece, i.e. the section
Length is 23.1 meters；
B, it is set as natural gas sintering stage 13 in the middle part of the sintering pallet 1 after hot gas sintering section 12, its length is taken to account for trolley overall length
The 21% of degree, the i.e. length of this section are 11.6 meters；Increase in this section and sintering feed is heated using natural gas；Natural gas leads to
Enter amount to supplement after solid fuel reduces dosage and make 25% principle of heat reduction amount；
C, remaining 1 length of sintering pallet is set as accumulation of heat sintering stage 14 after natural gas sintering stage 13；The section still uses exhausting to store
Hot type is sintered；
3) for flue gas generated in sintering process, through being drawn from cooled splicing vehicle 6, and through hot waste gas deduster 9 and ring
It is sintered outside after cold regenerator 10 for hot gas sintering section 12, extra flue gas then enters air flue emission；
4) it routinely discharges after being sintered.
When using conventional sintering technique, it is 60kg that anthracite, which is sinter per ton with dosage, and anthracite is matched after the present invention
It is 49.5kg that dosage, which is reduced to sinter per ton,；It is 30MJ/ kg calculating according to anthracitic calorific capacity, then after anthracite reduces
Sinter per ton reduction heat are as follows: (60 kg -49.5 kg) × 30MJ/ kg=315MJ；Use blowing calorific capacity for
35MJ/m3Natural gas, then the blowing amount of natural gas by anthracite reduce after reduced heat 25% calculating, then per ton
The blowing amount of sinter are as follows:
315MJ×25%÷35MJ/m3=2.25m3。
Embodiment 2
The present embodiment is with 450m2The mating 460m of sintering machine2The present invention will be described for ring cold machine, sintering pallet overall length
Degree is 90 meters；The solid fuel of the present embodiment is anthracite.
A kind of sintering method that can reduce solid fuel consumption amount and carbon emission, step:
1) routinely it is laid with sinter bed；
2) it is sintered:
A, in the hot gas sintering section 12 of sintering machine front end, heating burning is carried out to sintering feed jointly using solid fuel and hot waste gas
Knot；270 DEG C of heatrejection of control；
The hot gas sintering section 12 is to take its length to account for the 45% of sintering pallet total length since sintering device handpiece, i.e. the section
Length is 40.5 meters；
B, it is set as natural gas sintering stage 13 in the middle part of the sintering pallet 1 after hot gas sintering section 12, its length is taken to account for trolley overall length
The 23% of degree, the i.e. length of this section are 20.7 meters；Increase in this section and sintering feed is heated using natural gas；Natural gas leads to
Enter amount to supplement after solid fuel reduces dosage and make 27% principle of heat reduction amount；
C, remaining 1 length of sintering pallet is set as accumulation of heat sintering stage 14 after natural gas sintering stage 13；The section still uses exhausting to store
Hot type is sintered；
3) for flue gas generated in sintering process, through being drawn from cooled splicing vehicle 6, and through hot waste gas deduster 9 and ring
It is sintered outside after cold regenerator 10 for hot gas sintering section 12, extra flue gas then enters air flue emission；
4) it routinely discharges after being sintered.
When using conventional sintering technique, it is 60 kg that anthracite, which is sinter per ton with dosage, and anthracite is matched after the present invention
It is 48 kg that dosage, which is reduced to sinter per ton,；It is 30MJ/ kg calculating according to anthracitic calorific capacity, then it is every after anthracite reduces
Ton sinter reduction heat are as follows: (60 kg -48 kg) × 30MJ/ kg=360MJ；Use blowing calorific capacity for 35MJ/m3
Natural gas, then the blowing amount of natural gas reduced by anthracite after reduced heat 27% calculating, then sinter per ton
Blowing amount are as follows:
360 MJ×27%÷35 MJ/m3=2.78m3。
Illustrate: in each embodiment, other structure members that do not refer in process are by normal operation, without repeating.
Present embodiment is only the best example, not to the restricted implementation of technical solution of the present invention.
Claims (4)
1. a kind of sintering method that can reduce solid fuel consumption amount and carbon emission, step:
1) routinely it is laid with sinter bed；
2) it is sintered:
A, in the hot gas sintering section of sintering machine front end, heat-agglomerating is carried out to sintering feed jointly using solid fuel and hot waste gas；
It controls heatrejection and is not less than 200 DEG C；
The hot gas sintering section is since sintering device handpiece, and length accounts for the 40 ~ 50% of sintering pallet total length；
B, be set as natural gas sintering stage in the middle part of the trolley after hot gas sintering section, length account for sintering pallet total length 20 ~
25%；Increase in this section and sintering feed is heated using natural gas, the intake of natural gas reduces dosage to supplement solid fuel
After reduce heatAmount25 ~ 30% be principle；
C, remaining sintering pallet length is set as accumulation of heat sintering stage after natural gas sintering stage；The section still use exhausting heat accumulating type into
Row sintering；
3) for flue gas generated in sintering process, in addition to for the sintering of hot gas sintering section, extra flue gas then enters flue row
It puts.
2. for a kind of device for the sintering method that can reduce solid fuel consumption amount and carbon emission as described in claim 1,
Mainly by sintering pallet, the flue gas gathering tube being connect with sintering pallet, the deduster installed on flue gas gathering tube, exhausting
The cooled material receiver of setting, the hot waste gas pipe connecting with cooled material receiver, heat are useless below machine and smoke ejector, sintering pallet
The hot waste gas regulating valve installed on tracheae, hot waste gas deduster and ring cold regenerator, the blanking that is connect with sintering pallet head
Device composition, it is characterised in that: sintering pallet is successively set since the sintering pallet head and is divided into hot gas sintering section, natural gas
Sintering stage and three sections of accumulation of heat sintering stage；
Hot gas sintering section is since sintering pallet head, and length accounts for the 40 ~ 50% of sintering pallet total length；Hot waste gas
Pipe is connected to hot gas sintering section；
After natural gas sintering stage is located at hot gas sintering section, length accounts for the 20 ~ 25% of sintering pallet total length；It is burnt in natural gas
Knot section is connected with natural gas tube, and natural gas tube is simultaneously connect with gas source；And security system, natural gas are housed on natural gas tube
Regulating valve, instrument check device；
Remaining sintering pallet length is accumulation of heat sintering stage.
3. it is used for a kind of device of sintering method that can reduce solid fuel consumption amount and carbon emission as claimed in claim 2,
It is characterized by: a natural gas branch pipe is at least connected on natural gas tube, natural along the connection of natural gas sintering stage short transverse
Gas branch pipe, and natural gas adjusting valve is housed on natural gas branch pipe；Natural gas distribution valve is installed on natural gas tube.
4. it is used for a kind of device of sintering method that can reduce solid fuel consumption amount and carbon emission as claimed in claim 2,
It is characterized by: being connected at least one hot waste gas branch pipe on hot waste gas pipe, hot waste gas branch pipe is along hot gas sintering section short transverse
It is uniformly distributed, and hot waste gas regulating valve is housed on hot waste gas branch pipe；Hot waste gas distributing valve is housed on hot waste gas pipe.
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| CN201811466791.1A CN109554538B (en) | 2018-12-03 | 2018-12-03 | Sintering method and device capable of reducing solid fuel consumption and carbon emission |
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| CN201811466791.1A CN109554538B (en) | 2018-12-03 | 2018-12-03 | Sintering method and device capable of reducing solid fuel consumption and carbon emission |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110564952A (en) * | 2019-09-09 | 2019-12-13 | 中南大学 | Sintering energy-saving emission-reducing hydrogen-based fuel gas staged injection method |
| CN110592370A (en) * | 2019-09-09 | 2019-12-20 | 中南大学 | Low-carbon and low-emission sintering method based on coupling injection of multiple types of fuel gases |
| CN112813257A (en) * | 2020-12-30 | 2021-05-18 | 安徽工业大学 | Carbon-free sintering method for providing heat by adopting high air temperature |
| CN114317950A (en) * | 2021-12-30 | 2022-04-12 | 河北鑫达钢铁集团有限公司 | Environment-friendly sintering system and sintering method |
| CN114440630A (en) * | 2022-02-21 | 2022-05-06 | 中天钢铁集团(南通)有限公司 | Automatic regulation and control method for natural gas injection flow of sintering charge level |
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| CN110564952A (en) * | 2019-09-09 | 2019-12-13 | 中南大学 | Sintering energy-saving emission-reducing hydrogen-based fuel gas staged injection method |
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| CN112813257A (en) * | 2020-12-30 | 2021-05-18 | 安徽工业大学 | Carbon-free sintering method for providing heat by adopting high air temperature |
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| CN114440630A (en) * | 2022-02-21 | 2022-05-06 | 中天钢铁集团(南通)有限公司 | Automatic regulation and control method for natural gas injection flow of sintering charge level |
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| CN109554538B (en) | 2020-05-05 |
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