CN109439821A - Coal gas diffusion at top of blast furnace system - Google Patents
Coal gas diffusion at top of blast furnace system Download PDFInfo
- Publication number
- CN109439821A CN109439821A CN201811594752.XA CN201811594752A CN109439821A CN 109439821 A CN109439821 A CN 109439821A CN 201811594752 A CN201811594752 A CN 201811594752A CN 109439821 A CN109439821 A CN 109439821A
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- China
- Prior art keywords
- coal gas
- gas diffusion
- blast furnace
- dirt pocket
- furnace system
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/002—Evacuating and treating of exhaust gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/007—Controlling or regulating of the top pressure
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/22—Dust arresters
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
- Blast Furnaces (AREA)
Abstract
The present invention relates to a kind of coal gas diffusion at top of blast furnace system, including coal gas riser culverts, the coal gas riser culverts are connected with coal-gas recovering pipeline and at least one furnace gas release pipeline, and the furnace gas release pipeline terminal is provided with furnace gas diffusion valve.The coal gas diffusion at top of blast furnace system further includes dirt pocket, and the dirt pocket is equipped with exhaust passage, is equipped with the interior spraying mechanism sprayed water into its chamber in the dirt pocket, each furnace gas diffusion valve is contained in the dirt pocket.Coal gas diffusion at top of blast furnace system provided by the invention, in each furnace gas diffusion valve is surrounded on by setting dirt pocket, and spraying mechanism in being arranged in dirt pocket, cleaning dust is carried out to the indoor coal gas of dedusting is discharged into, the clean level for improving emission coal gas, reduces the Particulate Pollution of coal gas diffusion.
Description
Technical field
The invention belongs to BF Technology in Bao Steel fields, and in particular to a kind of coal gas diffusion at top of blast furnace system.
Background technique
Currently, coal gas diffusion at top of blast furnace, is mainly the following situation:
Emission coal gas of a part in iso-pressure blow off system.The blast furnace more early built, due to historical reasons weighing pot
In pressure coal gas, directly row Xiang great Qi；The blast furnace built in recent years is had taken up due to cost pressure and environmental protection pressure
Recycling measure.
Release when another part is from blast furnace staying: (1) planning damping down situation, the common approach is that early period is diffused,
Gas pressure is relatively high, takes recycling measure, when gas pressure drops to 30kPa~15kPa, in order to improve coal gas discharge
Speed reduces the damping down time, often diffuses into atmosphere low-pressure gas by furnace roof furnace gas diffusion valve 25, brings biggish make an uproar
The pollution of sound and particulate matter；(2) damping down outside the plan, situation are anxious, it is desirable that quickly reduce pressure in furnace body 1, be all often directly to open
It opens furnace roof furnace gas diffusion valve 25 coal gas is discharged into atmosphere, gas flow is especially big at this time, and discharge process brings serious
Noise and Particulate Pollution.
Such as Fig. 1, the coal gas generated in 1 production process of blast furnace is converged by the first tedge 21, the second tedge 22
To convergence tube 23 is risen, it is connected with three release pipelines on rising convergence tube 23 and desorption tube road is equipped with furnace gas diffusion valve 25,
In addition rise the steering of convergence tube 23 and be connected to coal gas down-comer 24, be connected to the dedusting recycling system of blast furnace.Stop in plan
When wind, recovery system is first opened, the high pressure gas in furnace body 1 is recycled, when furnace pressure drops to 30kPa~15kPa,
In order to improve coal gas mass rate of emission, the damping down time is reduced, furnace roof furnace gas is opened and diffuses furnace 25, coal gas is directly arranged into Xiang great Qi；?
When damping down and furnace pressure superelevation outside the plan, directly opening furnace roof furnace gas diffuses furnace 25, and coal gas is directly arranged Xiang great Qi；
For creating blast furnace, due to environmental protection, the pressure of cost, it is equipped with pressure-equalizing and discharging coal-gas recovering and utilizes system.Process is such as
Under: when needing to press in weighing pot 11, the high pressure gas in source capsule 63 of calming the anger provides pressure into weighing pot 11 by pipeline
Gas improves pressure inside the tank.When needing to reduce the release operation of pressure inside the tank, the pressure coal gas in weighing pot 11 passes through weighing pot
Pressure-equalizing and discharging pipe 61 is connected to pressure-equalizing and discharging gas recovery system 64, is recycled to coal gas.
It is not provided with uniform emission coal gas recovery system 64 than older blast furnace for some, common method is exactly
By opening pressure equalizing blow off valve 62, coal gas is directly discharged to atmosphere by pressure-equalizing and discharging pipe 61.
Above several situations, the coal gas of discharge can all bring serious noise pollution and Particulate Pollution, that is, common
Blast furnace over-emitting black exhaust, tobacco.
Summary of the invention
The present embodiments relate to a kind of coal gas diffusion at top of blast furnace system, the part that can at least solve the prior art is lacked
It falls into.
The present embodiments relate to a kind of coal gas diffusion at top of blast furnace system, including coal gas riser culverts, on the coal gas
Riser road is connected with coal-gas recovering pipeline and at least one furnace gas release pipeline, and the furnace gas release pipeline terminal is provided with furnace gas
Diffusion valve further includes dirt pocket, and the dirt pocket is equipped with exhaust passage, is equipped in the dirt pocket and to spray water into its chamber
Interior spraying mechanism, each furnace gas diffusion valve are contained in the dirt pocket.
As one of embodiment, at least one siding of the dirt pocket is microperforated panel and to constitute the exhaust logical
Road.
As one of embodiment, the outside of each microperforated panel is equipped with the outer spray thrower sprayed water to its opening area
Structure.
As one of embodiment, drip tray is equipped with below the dirt pocket.
As one of embodiment, the drip tray is connected with header tank by return pipe, is equipped in Yu Suoshu header tank
Filter structure, and the water supplying pipe connected with corresponding spraying mechanism is equipped in water purification side in case, water supply pump on the water supplying pipe.
It is equipped with partition as one of embodiment, in the header tank and space in case is divided into return water compartment and water supply compartment,
The return pipe is connected to the return water compartment, and the water supplying pipe is connected to the water supply compartment, and the partition is equipped with overflow ducts
And filter screen is equipped at overflow ducts.
As one of embodiment, which further includes expanding chamber, and the expanding chamber is equipped with and puts
Channel is dissipated, the clean room layout is in the expanding chamber.
As one of embodiment, the expanding chamber is equipped at least one silencer, the airflow channel structure of the silencer
At the release channel.
As one of embodiment, the siding of the expanding chamber is for cored slab and in sandwiched muffler plate in the hollow cavity of siding.
As one of embodiment, which further includes and weighs tank connected pressure-equalizing and discharging pipe
Road, the pressure-equalizing and discharging pipeline are equipped with pressure equalizing blow off valve, and the outlet end of the pressure-equalizing and discharging pipeline stretches to the dirt pocket
It is interior.
The embodiment of the present invention at least has the following beneficial effects:
Each furnace gas diffusion valve is surrounded on by coal gas diffusion at top of blast furnace system provided by the invention by setting dirt pocket
It is interior, and interior spraying mechanism is set in dirt pocket, cleaning dust is carried out to the indoor coal gas of dedusting is discharged into, improves emission coal gas
Clean level reduces the Particulate Pollution of coal gas diffusion.
The embodiment of the present invention further has the following beneficial effects:
Microperforated panel is set by the siding of dirt pocket, it is possible to reduce the noise that coal gas diffusion generates improves noise pollution.
The embodiment of the present invention further has the following beneficial effects:
By the way that outer spraying mechanism is arranged, cleaning dust is carried out to the coal gas being discharged from dirt pocket, improves the clean of emission coal gas
Net degree reduces the Particulate Pollution of coal gas diffusion, and can prevent microperforated panel from blocking.
The embodiment of the present invention further has the following beneficial effects:
By the way that expanding chamber is arranged silencer is set in particular on expanding chamber, further emission coal gas can be dropped
It makes an uproar, improves the noise pollution of coal gas diffusion.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram for the existing coal gas diffusion at top of blast furnace system that background technique provides；
Fig. 2 is the structural schematic diagram of coal gas diffusion at top of blast furnace system provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Such as Fig. 2, the embodiment of the present invention provides a kind of coal gas diffusion at top of blast furnace system, including coal gas riser culverts, described
Coal gas riser culverts are connected with coal-gas recovering pipeline 24 and at least one furnace gas release pipeline, and the furnace gas release pipeline terminal is set
It is equipped with furnace gas diffusion valve 25, generally, which includes that the first tedge 21, the second tedge 22 and rising converge
Pipe 23, the first tedge 21 is connect with blast furnace 1 with the second tedge 22 and outlet end connects with the rising convergence tube 23
It connects；In the present embodiment, above-mentioned furnace gas release pipeline has three, i.e., corresponding there are three furnace gas diffusion valves 25.
Further, if Fig. 2, the coal gas diffusion at top of blast furnace system further include dirt pocket 3, the dirt pocket 3 is equipped with
Exhaust passage, the dirt pocket 3 is interior to be equipped with the interior spraying mechanism 42 sprayed water into its chamber, and each diffusion valve is contained in institute
It states in dirt pocket 3.Conventional dedusting atomizer can be used in the interior spraying mechanism 42, wherein can be in each furnace gas diffusion valve
An atomizer is respectively set in 25 top, and the quantity and spacing of atomizer are selected according to the spacious degree of dirt pocket 3.
Coal gas diffusion at top of blast furnace system provided by the invention is surrounded each furnace gas diffusion valve 25 by setting dirt pocket 3
In interior, and spraying mechanism 42 in being arranged in dirt pocket 3, cleaning dust is carried out to the coal gas being discharged into dirt pocket 3, improves release
The clean level of coal gas reduces the Particulate Pollution of coal gas diffusion.
Further, at least one siding of the dirt pocket 3 is microperforated panel 31, it is possible to reduce what coal gas diffusion generated
Noise, improves noise pollution, i.e. the dirt pocket 3 can also play the role of anechoic chamber.Microperforated panel 31 is existing noise reduction knot
Structure offers multiple apertures on plate body, which is preferably sheet metal.
Preferably, such as Fig. 2, which is square box cell structure, designs the wall of each side in its left and right sides/all around
Plate is microperforated panel 31.Coal gas moves, Ke Yiyan after being discharged in each furnace gas diffusion valve 25 to 3 left and right sides/surrounding of dirt pocket
Its long residence time in dirt pocket 3, erasure effect on the one hand can be improved, on the other hand, dust removing effects can be improved.
It is further preferred that the outside of each microperforated panel 31 is equipped with the outer spray sprayed water to its opening area such as Fig. 2
Mechanism 41 is drenched, which can be used conventional dedusting atomizer.By the way that outer spraying mechanism 41 is arranged, to from removing
The coal gas that dirt room 3 is discharged carries out cleaning dust, improves the clean level of emission coal gas, reduces the Particulate Pollution of coal gas diffusion,
And it can prevent microperforated panel 31 from blocking.
Further, based on the above-mentioned structure for being provided with spraying mechanism, such as Fig. 2 is equipped with drip tray below the dirt pocket 3
43, for accepting the water flow down after washing coal gas.It, can be from the microperforated panel 31 of two sides for the shower water in dirt pocket 3
Outflow, can also be arranged multiple return ports on the bottom plate of dirt pocket 3.
The washing water accepted by drip tray 43 can carry out reuse, to reduce spray water consumption.Correspondingly, described such as Fig. 2
Drip tray 43 is connected with header tank 44 by return pipe, is equipped with filter mechanism in Yu Suoshu header tank 44, and in water purification side in case
Equipped with the water supplying pipe connected with corresponding spraying mechanism, water supply pump 45 on the water supplying pipe.Filter mechanism is used for will be in washing water
Dust etc. filter out, avoid atomizer etc. from blocking；It can wait conventional filter plant using filter screen 442.Wherein
In one embodiment, such as Fig. 2, the header tank 44 is interior to be equipped with partition 441 and space in case is divided into return water compartment and water supply compartment,
The return pipe is connected to the return water compartment, and the water supplying pipe is connected to the water supply compartment, and the partition 441 is logical equipped with overflow
Road and at overflow ducts be equipped with filter screen 442；Aforementioned barriers 441 can with contacted at the top of header tank 44 and in 441 plate body of partition
Upper setting overflow hole, can not also with contacted at the top of header tank 44, thus its space, that is, conduct header tank between 44 tops
Overflow ducts.
Advanced optimize the structure of above-mentioned coal gas diffusion at top of blast furnace system, such as Fig. 2, the coal gas diffusion at top of blast furnace system
It further include expanding chamber 5, the expanding chamber 5 is equipped with release channel, and the dirt pocket 3 is arranged in the expanding chamber 5.Diffuse coal
When gas is discharged into expanding chamber 5 out of dirt pocket 3, volume expansion can further achieve the purpose that noise reduction dedusting.Its
In, it is preferable that the expanding chamber 5 is equipped at least one silencer 51, puts described in the airflow channel composition of the silencer 51
Channel is dissipated, which can be used existing conventional channel-type silencing equipment, micropunch plate type silencer as escribed above, pipe
Formula muffler etc. can be bought by market, and specific structure does not repeat herein.It is apparent that the silencer 51 being arranged on expanding chamber 5
Noise reduction can further be played the role of.
Such as Fig. 2, it is rectangular case structure which, which is preferably again, and silencer 51 may be disposed at the side of the expanding chamber 5
On wall, it can be set in the two side walls of left and right, may also set up on four side walls all around.
In addition, the siding of the expanding chamber 5 mentions for cored slab and in sandwiched muffler plate 52 in the hollow cavity of siding such as Fig. 2
The noise reduction effect of high expansion room 5.It is the folded of inside and outside two-layered steel plates and inner clip muffler plate 52 that each siding of the expanding chamber 5, which is both preferably,
Layer structure.
Preferably, above-mentioned expanding chamber 5 and dirt pocket 3 are detachable structure, it is easily installed and safeguards.For example, swollen
The six of swollen room 5 face the wall and meditate equipped with the mechanism being rapidly assembled and disassembled between plate, can be to be bolted or snap connection；Dirt pocket
3 can be used same structure, not repeat one by one herein.
Advanced optimize the structure of above-mentioned coal gas diffusion at top of blast furnace system, such as Fig. 2, the coal gas diffusion at top of blast furnace system
It further include the pressure-equalizing and discharging pipeline 61 being connect with weighing pot 11, the pressure-equalizing and discharging pipeline 61 is equipped with pressure equalizing blow off valve 62, institute
The outlet end for stating pressure-equalizing and discharging pipeline 61 stretches in the dirt pocket 3, by means of above-mentioned noise reduction dedusting structure, can play pair
The effect of the noise reduction dedusting of blast furnace pressure-equalizing and discharging coal gas.On the pressure-equalizing and discharging pipeline 61, in pressure equalizing blow off valve 62 and it can weigh
The cleaners such as cyclone dust collectors 65 are set between tank 11.
The specific work process of above-mentioned coal gas diffusion at top of blast furnace system approximately as:
(1) it is weighed for being not provided with the blast furnace of pressure-equalizing and discharging gas recovery system according to its pressure-equalizing and discharging operating process
Tank 11 proposes that release decompression requires, and pressure equalizing blow off valve 62 is opened, while starting water supply pump 45, into dirt pocket 3 and on dirt pocket 3
Microperforated panel 31 spray water, coal gas from dirt pocket 3 enter expanding chamber 5 during, by dedusting noise reduction.Then pass through 5 He of expanding chamber
The noise reduction again of silencer 51, achievees the purpose that dedusting noise reduction.
(2) the case where reducing is needed for pressure in plan damping down, furnace body 1, recovery system is opened, by the height in furnace body 1
Pressure coal gas quickly recycles, and when pressure drops to 30~15KPa, recycling speed is reduced, in order to improve coal gas mass rate of emission in furnace body 1,
The damping down time is reduced, the blast furnace gas recycling system that coal-gas recovering pipeline 24 connects is closed, starts water supply pump 45, to dedusting
Microperforated panel 31 in room 3 and on dirt pocket 3 is sprayed water, and is then turned on each furnace gas diffusion valve 25, gas of high flow rate is put by furnace gas
It dissipates valve 25 to enter in dirt pocket 3, during coal gas is from dirt pocket 3 into expanding chamber 5, by dedusting noise reduction, then passes through expanding chamber 5
With the noise reduction again of silencer 51, achieve the purpose that dedusting noise reduction.
(3) unplanned damping down situation, coal gas needs reduction of blood pressure in high-speed in blast furnace 1, closes coal-gas recovering pipeline 24 and connects
Blast furnace gas recycling system, start water supply pump 45, microperforated panel 31 into dirt pocket 3 and on dirt pocket 3 is sprayed water, so
After open each furnace gas diffusion valve 25, gas of high flow rate is entered in dirt pocket 3 by furnace gas diffusion valve 25, coal gas from dirt pocket 3 into
During entering expanding chamber 5, by dedusting noise reduction, then passes through the noise reduction again of expanding chamber 5 and silencer 51, reach dedusting noise reduction
Purpose.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of coal gas diffusion at top of blast furnace system, including coal gas riser culverts, the coal gas riser culverts are connected with coal gas and return
Closed tube road and at least one furnace gas diffuse pipeline, and the furnace gas release pipeline terminal is provided with furnace gas diffusion valve, it is characterised in that:
It further include dirt pocket, the dirt pocket is equipped with exhaust passage, is equipped with the interior spray sprayed water into its chamber in the dirt pocket
Mechanism, each furnace gas diffusion valve are contained in the dirt pocket.
2. coal gas diffusion at top of blast furnace system as described in claim 1, it is characterised in that: at least one wall of the dirt pocket
Plate is microperforated panel and constitutes the exhaust passage.
3. coal gas diffusion at top of blast furnace system as claimed in claim 2, it is characterised in that: the outside of each microperforated panel
Equipped with the outer spraying mechanism sprayed water to its opening area.
4. coal gas diffusion at top of blast furnace system as claimed in claim 1 or 3, it is characterised in that: be equipped with below the dirt pocket
Drip tray.
5. coal gas diffusion at top of blast furnace system as claimed in claim 4, it is characterised in that: the drip tray is connected by return pipe
It is connected to header tank, filter mechanism is equipped in Yu Suoshu header tank, and be equipped in water purification side in case and connect with corresponding spraying mechanism
Water supplying pipe, water supply pump on the water supplying pipe.
6. coal gas diffusion at top of blast furnace system as claimed in claim 5, it is characterised in that: be equipped in the header tank partition and
Space in case is divided into return water compartment and water supply compartment, the return pipe is connected to the return water compartment, the water supplying pipe and the confession
The connection of water compartment, the partition are equipped with overflow ducts and are equipped with filter screen at overflow ducts.
7. coal gas diffusion at top of blast furnace system as described in claim 1, it is characterised in that: it further include expanding chamber, the expansion
Room is equipped with release channel, and the clean room layout is in the expanding chamber.
8. coal gas diffusion at top of blast furnace system as claimed in claim 7, it is characterised in that: the expanding chamber is equipped at least one
The airflow channel of a silencer, the silencer constitutes the release channel.
9. coal gas diffusion at top of blast furnace system as claimed in claim 7, it is characterised in that: the siding of the expanding chamber is hollow
Plate and in sandwiched muffler plate in the hollow cavity of siding.
10. coal gas diffusion at top of blast furnace system as described in claim 1, it is characterised in that: further include tank connected with weighing
Pressure-equalizing and discharging pipeline, the pressure-equalizing and discharging pipeline are equipped with pressure equalizing blow off valve, and the outlet end of the pressure-equalizing and discharging pipeline stretches to
In the dirt pocket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811594752.XA CN109439821B (en) | 2018-12-25 | 2018-12-25 | Blast furnace top gas bleeding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811594752.XA CN109439821B (en) | 2018-12-25 | 2018-12-25 | Blast furnace top gas bleeding system |
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| Publication Number | Publication Date |
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| CN109439821A true CN109439821A (en) | 2019-03-08 |
| CN109439821B CN109439821B (en) | 2021-01-05 |
Family
ID=65538113
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811594752.XA Active CN109439821B (en) | 2018-12-25 | 2018-12-25 | Blast furnace top gas bleeding system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021136010A1 (en) * | 2019-12-31 | 2021-07-08 | 中冶南方工程技术有限公司 | Furnace top diffused gas dust removal device during blowing-down and reblowing of blast furnace |
| CN113278747A (en) * | 2020-02-20 | 2021-08-20 | 宝山钢铁股份有限公司 | Method for preventing ash emission from top of blast furnace |
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| CN113278747A (en) * | 2020-02-20 | 2021-08-20 | 宝山钢铁股份有限公司 | Method for preventing ash emission from top of blast furnace |
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| CN109439821B (en) | 2021-01-05 |
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