CN206486556U - Coal gas of converter diffuses catalytic combustion system - Google Patents
Coal gas of converter diffuses catalytic combustion system Download PDFInfo
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- CN206486556U CN206486556U CN201620942573.0U CN201620942573U CN206486556U CN 206486556 U CN206486556 U CN 206486556U CN 201620942573 U CN201620942573 U CN 201620942573U CN 206486556 U CN206486556 U CN 206486556U
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- converter
- coal gas
- catalytic combustion
- diffuses
- pipeline
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Abstract
The utility model discloses a kind of coal gas of converter and diffuses catalytic combustion system.Described system at least includes a sensor, control device and the controlled three-way switch valve connected in converter gas pipeline；Wherein, when the CO contents in described flue gas pipeline are more than predetermined value, control device control three-way switch valve switching is connected with recovery line；When the CO contents in described flue gas pipeline are less than predetermined value, control device control three-way switch valve switching is connected with diffusing pipeline, and energy recovery is carried out through catalytic combustion system.The utility model is by diffusing CO content in smoke making a distinction and controlling that the sufficient burning of the heat in the coal gas in the stage of diffusing can not only be used, while it also avoid coal gas discharge pollution on the environment.While the utility model small investment, in a short time being capable of cost recovery rapidly.
Description
Technical field
The utility model is related to a kind of coal gas of converter and diffuses catalytic combustion system.
Background technology
Current iron and steel enterprise is in steelmaking process, mainly using converter smelting.Converter is produced greatly during oxygen blast
The high-temperature flue gas of amount, wherein CO contents are up to more than 86%, and other are CO2、N2Deng energy value height；It is basic using not both at home and abroad
Combustion method wet method or dry purifying system are purified to converter gas, and realize that coal gas is reclaimed automatically.
Converter gas purification dust pelletizing system takes unburned method cleaning system.High-temperature flue gas (1400~1600 DEG C) is through vaporization
Cooling stack is cooled down, and flue-gas temperature is reduced to~900 DEG C, successively enters evaporation scrubbing tower, washing Venturi tube (dry method horizontal electric precipitation
Device) carry out refined dedusting.When coal gas meets recovery condition after purification, flue gas switches to water seal inverted valve by triple valve, by water
Envelope non-return valve and gas holder Inlet water are honored as a queen and are sent to gas chamber, are then sent to gas pressing by the booster fan of Gas Pressurization Station
Each user；When flue gas does not meet recovery condition, flue gas switches to diffusing chimney through by-passing valve, triple valve, then passes through discharge
Stack ignition is diffused.
Gas recovery condition C O≤25%, O2<1.5%, when condition is not satisfied, coal gas of converter, which is switched to, diffuses shape
State, coal gas of converter ignition is diffused.According to converter heat size from 50 tons to 300 tons, smelting cycle was from 20 minutes to 60 minutes
In difference, each smelting cycle, in the 2-4 minutes in Converter Oxigen Blowing initial stage and latter stage, CO concentration is relatively low, now all by low concentration
Coal gas ignition diffuse.
On the one hand traditional flame combustion can lose portion of energy in the form of visible ray, and another aspect part CO is not complete
Full burning causes efficiency of combustion relatively low, while generating toxic pollutant NOxPollute environment.Being catalyzed burning is entered in catalyst surface
Capable flameless combustion, makes CO carry out oxidation reaction at a lower temperature by catalyst.Catalysis is burnt for improving combustion process,
Reaction temperature is reduced, promotes burning completely, plays the role of in terms of the formation for suppressing poisonous and harmful substance particularly important.With biography
The flame combustion of system is compared, with obvious advantage：
(1) initiation temperature is low, non-secondary pollution
Coal gas of converter carries out flame combustion, need to be heated to 700 DEG C of high temperature above, and conventional auxiliary ignition device uses hyperpyrexia
It is worth fuel ignition burning, cost is too high, and is also easy to produce NOx, cause secondary pollution；And combustion reaction can be reduced by catalyst
Activation energy, allows reaction to carry out at relatively low temperature, and reaction temperature can be down to 300-400 DEG C.
(2) energy utilization rate is high
In catalyst combustion reaction, fuel complete oxidation, the ratio usually not between waste of fuel, and fuel and air
Example can be controlled, and can reduce the energy loss that air or fuel excess are caused.React and reach after initiation temperature, can be without extraneous
Heat supply, reduces energy consumption, subsequently regulates and controls heat supply according to carrying out practically situation.
At present, domestic steel mill diffuses for the coal gas ignition of low concentration is all provided with auxiliary igniter, and igniter fuel is height
Calorific value coke-stove gas, and 24 hours burn, be referred to as altar lamp, be often only this igniting needs coal gas be just worth it is hundreds thousand of
Hundreds of thousands member is also wanted in member, igniter investment.In addition, directly burning and exhausting can produce thermal NOx, air is polluted,
The heat that burning is produced also results in surrounding environment thermal pollution.Some small shaped steel enterprises is save part investment and operating cost, very
Misfire burning, directly discharge, severe contamination surrounding environment to emission coal gas, infringement people's is healthy.
In view of this, it would be highly desirable to provide it is a kind of more rationally effectively diffuse state converter gas processing system, reduce environment
The operating cost that pollution and steel are looked forward to.
Utility model content
To overcome drawbacks described above, the utility model purpose, which is to provide, a kind of to be reclaimed the heat diffused in phase coal gas, saves
Steel enterprise cost, the coal gas of converter of reduction environmental pollution diffuse catalytic combustion system.
To reach above-mentioned purpose, the utility model coal gas of converter diffuses catalytic combustion system, and described system at least includes
One sensor, control device and the controlled three-way switch valve connected in converter gas pipeline；Wherein, when described flue gas pipeline
When interior CO contents are more than predetermined value, control device control three-way switch valve switching is connected with recovery line；When described flue gas
When CO contents in pipeline are less than predetermined value, control device control three-way switch valve switching is connected with diffusing pipeline.
Preferably, being provided with catalytic combustion reactor in the described pipeline that diffuses.
Preferably, described catalytic combustion reactor is equipped with two layers of catalyst, described catalyst is noble metal catalyst
And/or non-precious metal catalyst.
Preferably, be also sequentially connected in series between described catalytic combustion reactor and three-way switch valve air intake mixing section and
Spark arrester；There is homogenizing plate inside the air intake mixing section.
Preferably, wind outlet section is additionally provided with pipeline after described catalytic combustion reactor, it is residual neat recovering system, soft
Change water system.
Preferably, the residual neat recovering system at least includes heat-pipe heat exchanger.
The utility model is by can not only be by the coal in the stage of diffusing to diffusing that CO content in smoke makes a distinction and control
Sufficiently burning is used heat in gas, while it also avoid coal gas discharge pollution on the environment.This practicality simultaneously
New Ventures are few, in a short time being capable of cost recovery rapidly.
Brief description of the drawings
Fig. 1 is converter gas Recovery Purifying and the structured flowchart using system in the utility model.
Embodiment
Embodiment of the present utility model is described in further detail with reference to the accompanying drawings and examples.Following examples
For illustrating the utility model, but it can not be used for limiting scope of the present utility model.
A kind of coal gas of converter of the present utility model diffuses catalysis burning and recycles integrated system, including one with residual heat resources
Sensor, control device and the controlled three-way switch valve connected in converter gas pipeline；Wherein, when in described flue gas pipeline
CO contents be more than predetermined value when, control device control three-way switch valve switching is connected with recovery line；When described fume pipe
When CO contents in line are less than predetermined value, control device control three-way switch valve switching is connected with diffusing pipeline.Described diffuses
Pipeline includes air intake mixing section, spark arrester, catalytic combustion reactor, wind outlet section, residual neat recovering system, softening water system.
Wherein, there is homogenizing plate inside above-mentioned air intake mixing section, emission coal gas and air can be sufficiently mixed.Above-mentioned back-fire relief
Device prevents tempering, and its refractory temperature is not less than 1000 DEG C.
Above-mentioned catalytic combustion reactor can be fixation built with catalyst, preferably integral catalyzer, structure of reactor
Bed or fluid bed.Wherein, the catalyst is noble metal catalyst (Pd/Cu/CeO2/ ceramic honeycomb carrier, Pt/Cu/CeO2/
Metal beehive carrier, Au/CeO2/ ceramic honeycomb carrier etc.), non-precious metal catalyst (MnOx/ YSZ/ ceramic honeycomb carriers,
LaMnO3/ ceramic honeycomb carrier, LaCo1-xFexO3/ metal beehive carrier etc.) in one or more.Above-mentioned catalyst combustion reaction
The igniter of device is fuel igniter or electrical heating igniter.Above-mentioned catalytic combustion reactor is provided with temperature control device,
It is 300-700 DEG C that regulation and control catalytic combustion system initiation temperature scope, which can be stablized,.
The above-mentioned preferred heat-pipe heat exchanger of residual neat recovering system, efficiently converts the water to height by the heat of flue gas after burning
Warm high steam, into steam pipe system.Water in the steam pipe system need to be handled by softening water system.
Catalysis burning is diffused to coal gas of converter of the present utility model there is provided one embodiment below according to carrying out practically flow
Integrated system apparatus is recycled with residual heat resources to illustrate.
Embodiment 1
Fig. 1 is referred to, the utility model is that a kind of coal gas of converter diffuses catalysis burning and residual heat resources recycling is integrated
System.
Converter inner flue gas of the stove is after the purification of dry method electric cleaner, when CO content in smoke is more than 25%, three-way switch valve
Qualified coal gas is switched to recovery side, coal gas enters gas chamber and stores utilization.
3 minutes initial stages of oxygen blast and 3 minutes latter stages, coal gas (about 72 of the CO contents below 25% after purification are being smelted in converter
DEG C), gone to by three-way switch valve and diffuse side, into catalytic combustion thermal energy recovery system.Emission coal gas and a certain amount of air are mixed
Catalytic reactor is entered by homogenizing plate after conjunction.Wherein, catalytic reactor fills catalyst respectively expensive equipped with two layers of catalyst
Metallic catalyst (Pd/Cu/CeO2/ ceramic honeycomb carrier, Pt/Cu/CeO2/ metal beehive carrier, Au/CeO2/ ceramic honeycomb is carried
Body etc.), non-precious metal catalyst (MnOx/ YSZ/ ceramic honeycomb carriers, LaMnO3/ ceramic honeycomb carrier, LaCo1-xFexO3/ gold
Belong to honeycomb substrate etc.) in one or more.When catalytic reactor starts, fuel igniter is lighted a fire first, until catalyst
Bed temperature reaches 400 DEG C.Emission coal gas and air Mixture are passed through, in this catalytic reactor, the CO in coal gas is in catalysis
Catalyst combustion reaction is carried out under the catalytic action of agent, CO is oxidized generation CO2, and substantial amounts of heat is discharged, coal is diffused in regulation and control
Gas and AIR Proportional, control catalysis burn rate, make exit gas temperature maintain 800~900 DEG C.
High-temperature flue gas changes into high temperature and high pressure steam by heat pipe-type residual neat recovering system, water of the heat by softening, and
It is stored in storage heater, the steam pipe system for being sent to steel mill is subject to efficient and rational utilization.
More than, preferred embodiment only of the present utility model, but protection domain of the present utility model is not limited thereto, and appoints
What those familiar with the art the change that can readily occur in or replaces in the technical scope that the utility model is disclosed
Change, should all cover within protection domain of the present utility model.Therefore, protection domain of the present utility model should be with claim
The protection domain defined is defined.
Claims (6)
1. a kind of coal gas of converter diffuses catalytic combustion system, it is characterised in that described system at least includes a sensor, control
Device and the controlled three-way switch valve connected in converter gas pipeline；Wherein, when the CO contents in described flue gas pipeline are big
When predetermined value, control device control three-way switch valve switching is connected with recovery line；When the CO in described flue gas pipeline contains
When amount is less than predetermined value, control device control three-way switch valve switching is connected with diffusing pipeline.
2. coal gas of converter as claimed in claim 1 diffuses catalytic combustion system, it is characterised in that set in the described pipeline that diffuses
It is equipped with catalytic combustion reactor.
3. coal gas of converter as claimed in claim 2 diffuses catalytic combustion system, it is characterised in that described catalyst combustion reaction
Device is noble metal catalyst and/or non-precious metal catalyst equipped with two layers of catalyst, described catalyst.
4. coal gas of converter as claimed in claim 2 diffuses catalytic combustion system, it is characterised in that in described catalysis burning instead
Answer and air intake mixing section and spark arrester have also been sequentially connected in series between device and three-way switch valve；Have inside the air intake mixing section and flow
Plate.
5. coal gas of converter as claimed in claim 2 diffuses catalytic combustion system, it is characterised in that in described catalysis burning instead
Answer and wind outlet section, residual neat recovering system, softening water system are additionally provided with the pipeline after device.
6. coal gas of converter as claimed in claim 5 diffuses catalytic combustion system, it is characterised in that the residual neat recovering system is extremely
Include heat-pipe heat exchanger less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620942573.0U CN206486556U (en) | 2016-08-25 | 2016-08-25 | Coal gas of converter diffuses catalytic combustion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620942573.0U CN206486556U (en) | 2016-08-25 | 2016-08-25 | Coal gas of converter diffuses catalytic combustion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206486556U true CN206486556U (en) | 2017-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620942573.0U Active CN206486556U (en) | 2016-08-25 | 2016-08-25 | Coal gas of converter diffuses catalytic combustion system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206486556U (en) |
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2016
- 2016-08-25 CN CN201620942573.0U patent/CN206486556U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220602 Address after: 243000 Fu Chang Industrial Park, 259 HSI Nan Road, Ma'anshan economic and Technological Development Zone, Anhui Patentee after: HUATIAN ENGINEERING & TECHNOLOGY CORPORATION, MCC Patentee after: HUATIAN NANJING ENGINEERING & TECHNOLOGY CORPORATION, MCC Address before: 243005 Hunan West Road, Ma'anshan, Ma'anshan, Anhui Patentee before: HUATIAN ENGINEERING & TECHNOLOGY CORPORATION, MCC Patentee before: MCC HUATIAN (ANHUI) ENERGY SAVING ENVIRONMENTAL PROTECTION RESEARCH INSTITUTE Co.,Ltd. |
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| TR01 | Transfer of patent right |