CN104745755B - Online dust cleaning method for blast furnace gas dry dust removing system - Google Patents
Online dust cleaning method for blast furnace gas dry dust removing system Download PDFInfo
- Publication number
- CN104745755B CN104745755B CN201510211979.1A CN201510211979A CN104745755B CN 104745755 B CN104745755 B CN 104745755B CN 201510211979 A CN201510211979 A CN 201510211979A CN 104745755 B CN104745755 B CN 104745755B
- Authority
- CN
- China
- Prior art keywords
- pressure
- blast furnace
- valve
- cylinder
- barrel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/22—Dust arresters
-
- 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
-
- C21B2100/02—
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
Abstract
The invention discloses an online dust cleaning method for a blast furnace gas dry dust removing system. The method comprises the following steps: I, closing an inlet valve and an outlet valve; II, opening a top blow-off valve; III, when the internal pressure of a barrel is lower than the inlet pressure of the barrel and the difference between the internal pressure of the barrel and the inlet pressure of the barrel is between 80kPa and 120kPa, opening the inlet valve; IV, when the internal pressure of the barrel is lower than the inlet pressure of the barrel and the difference between the internal pressure of the barrel and the inlet pressure of the barrel is between 20kPa and 30kPa, closing the top blow-off valve; V, observing the internal pressure of the barrel and the inlet pressure of the barrel, and opening the outlet valve if the internal pressure of the barrel is equal to the inlet pressure of the barrel; otherwise, repeating steps I to IV, and opening the outlet valve till the internal pressure of the barrel is equal to the inlet pressure of the barrel. By adopting the online dust cleaning method for the blast furnace gas dry dust removing system, normal production of a blast furnace can be ensured.
Description
Technical field
The present invention relates to dust pelletizing system technical field, more particularly to a kind of blast furnace gas dry dusting system online ash removal
Method.
Background technology
Blast furnace gas dry dusting system mainly purifies to raw gas produced by the production processes such as blast furnace ironmaking,
Reduce the pollutant load in discharged coal gas.In blast furnace gas dry dusting system, nonaqueous dust cleaner is that it is main
Dust arrester, nonaqueous dust cleaner mainly includes being provided with the cylinder of inlet valve, outlet valve and top diffusion valve.
With the development of bad ore deposit low temperature ironmaking technology, in blast furnace gas, alkali metal content, water content increase severely, and enter dry method and remove
In raw gas in dirt device, the viscosity of dust and humidity are larger, in shorter run time, dust can stick hardened in dry method
On the pipeline that the inlet valve of cleaner unit is located, block pipeline, had a strong impact on the normal operation of blast furnace.
Therefore, in order to pipeline is carried out with deashing process, existing method is blast furnace staying, by under the pipeline being blocked dismounting
Come, then carry out deashing process, the pipeline cleaning out is re-started installation.
But, due to needing to be cleared up again after dismantling pipeline, need to force blast furnace staying in scale removal process, lead to
Blast furnace can not be normally carried out producing；And due to dust can be occurred in shorter run time to block the problem of pipeline, because
This needs frequently pipeline to be cleared up, and cleaning each time all can impact to the normal production of blast furnace, thus leading
Production efficiency is caused to reduce.
Therefore, how to carry out online soot blowing cleaning to pipeline is those skilled in the art's technical issues that need to address.
Content of the invention
In view of this, the purpose of the application is to provide a kind of blast furnace gas dry dusting system online ash removal method, permissible
Avoid blast furnace staying in deashing process it is ensured that the normal production of blast furnace.
This application provides a kind of blast furnace gas dry dusting system online ash removal method, including step:
Step one, closes inlet valve and outlet valve；
Step 2, opens top diffusion valve；
Step 3, when inner barrel pressure is less than cylinder inlet pressure and the difference of inner barrel pressure and cylinder inlet pressure
When value is between 80kpa to 120kpa, open inlet valve；
Step 4, when inner barrel pressure is less than cylinder inlet pressure and the difference of inner barrel pressure and cylinder inlet pressure
When value is between 20kpa to 30kpa, close described top diffusion valve；
Step 5, observes the pressure of described inner barrel and described cylinder inlet pressure, if described inner barrel pressure
Maintain an equal level with described cylinder inlet pressure phase, open described outlet valve；Otherwise repeat step one is to step 4, until in described cylinder
Portion's pressure is at a stalemate at ordinary times with described cylinder inlet pressure, opens described outlet valve.
Preferably, also include step 6, open ash output valve, carry out blow tank conveying cleaning.
Preferably, described blast furnace gas dry dusting system includes cylinder described at least two, and repeat step one is to step
Six, one by one deashing is carried out to described cylinder successively.
A kind of blast furnace gas dry dusting system online ash removal method provided herein comprises the steps:
Step one, closes inlet valve and outlet valve；
Step 2, opens top diffusion valve；
Step 3, when inner barrel pressure is less than cylinder inlet pressure and the difference of inner barrel pressure and cylinder inlet pressure
When value is between 80kpa to 120kpa, open described inlet valve；
Step 4, when inner barrel pressure is less than cylinder inlet pressure and the difference of inner barrel pressure and cylinder inlet pressure
When value is between 20kpa to 30kpa, close described top diffusion valve；
Step 5, observes pressure and the cylinder inlet pressure of inner barrel, if inner barrel pressure and cylinder inlet-pressure
Power phase maintains an equal level, and opens described outlet valve；Otherwise repeat step one is to step 4, until inner barrel pressure and cylinder inlet pressure
At a stalemate at ordinary times, open outlet valve.
So, by closing inlet valve and outlet valve, then open top diffusion valve again it is ensured that cylinder inlet pressure
There is larger pressure reduction and inner barrel pressure between, then open inlet valve again, using pressure reduction between the two, import is propped up
The dust of the deposition in pipe pours inner barrel, thus will in the purpose that realization is cleared up to entrance branch, with prior art
Pipeline disassembles and carries out dust stratification and compare, by using blast furnace gas dry dusting system online ash removal side provided herein
Method, using the pressure reduction between cylinder inlet pressure and inner barrel pressure, moment increases pipeline internal medium (specially flue gas)
Flow velocity, the dust being deposited in entrance branch, in flow process, can be poured inner barrel by medium, thus realizing to import
Arm is cleared up, because whole deashing process does not need blast furnace staying, such that it is able to guarantee that blast furnace is normally produced.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of nonaqueous dust cleaner in a kind of specific embodiment provided herein；
Wherein, in Fig. 1:
Cylinder 1, inlet valve 2, outlet valve 3, top diffusion valve 4, entrance branch 5, ash output valve 6, storehouse pump 7.
Specific embodiment
The invention discloses a kind of blast furnace gas dry dusting system online ash removal method, can avoid in deashing process
Blast furnace staying is it is ensured that the normal production of blast furnace.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
Refer to Fig. 1, Fig. 1 is the structural representation of nonaqueous dust cleaner in a kind of specific embodiment provided herein
Figure.In FIG, arrow represents the flow direction of blast furnace gas.
In this embodiment, blast furnace gas dry dusting system online ash removal method comprises the steps:
Step one, closes inlet valve 2 and outlet valve 3；
Step 2, opens top diffusion valve 4；
Step 3, when cylinder 1 internal pressure is less than cylinder 1 inlet pressure and cylinder 1 internal pressure and cylinder 1 inlet pressure
Difference between 80kpa to 120kpa when, open inlet valve 2；
Step 4, when cylinder 1 internal pressure is less than cylinder 1 inlet pressure and cylinder 1 internal pressure and cylinder 1 inlet pressure
Difference between 20kpa to 30kpa when, close top diffusion valve 4；
Step 5, observes cylinder 1 internal pressure and cylinder 1 inlet pressure, if cylinder 1 internal pressure and cylinder 1 import
Pressure phase maintains an equal level, and determines that blocking is removed, opens outlet valve 3；Otherwise, repeat step one is to step 4, until cylinder 1 internal pressure
At a stalemate at ordinary times with cylinder 1 inlet pressure, open outlet valve 3；
So, by closing inlet valve 2 and outlet valve 3, then open top diffusion valve 4 again it is ensured that cylinder 1 import
There is larger pressure reduction between pressure and cylinder 1 internal pressure, then open inlet valve 2 again, will using pressure reduction between the two
The dust of the deposition in entrance branch 5 pours inside cylinder 1, thus realizing purpose that entrance branch 5 is cleared up, and existing
In technology, pipeline is disassembled carry out dust stratification cleaning compare, by using blast furnace gas dry dusting system provided herein
System online ash removal method, using the pressure reduction between cylinder 1 inlet pressure and cylinder 1 internal pressure, moment increases pipeline internal medium
The flow velocity of (specially flue gas), medium, in flow process, can pour the dust being deposited in entrance branch 5 in cylinder 1
Portion, thus realize entrance branch 5 being cleared up, because whole deashing process does not need blast furnace staying, such that it is able to guarantee height
Stove is normally produced.
Simultaneously as not needing to be dismantled pipeline, can avoid, in deashing process, the phenomenons such as airborne dust occur, and then
May insure the spatter property of working environment.
It should be noted that in order to ensure the completeness cleaned, above-mentioned steps can be typically repeated 1 to 4 with repetitive operation
Secondary aforesaid operations, you can reach the purpose of dust stratification thoroughly cleaning, certainly, be also not excluded for determining weight according to the actual condition of production
The number of times of multiple operation.
Additionally, in order to recycle to dust, in this embodiment, also include step 6, treating above-mentioned steps
After the completion of, open ash output valve 6, enter the defeated ash cleaning of firm position pump 7, so can ensure that will be defeated for collected dust in nonaqueous dust cleaner
Go out, then dust is processed, reused.
Further, since blast furnace gas dry dusting system includes at least two cylinders, therefore repeat step one to step 6,
One by one deashing is carried out to cylinder 1 successively.So, by way of using one by one deashing being carried out to cylinder, can be normal in blast furnace
In running, remove each dust deposited in pipeline of dust pelletizing system, it is to avoid blast furnace staying is it is ensured that normal produce.
In this specification, each embodiment is described by the way of going forward one by one, and what each embodiment stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple modifications to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and be to fit to and principles disclosed herein and features of novelty phase one
The scope the widest causing.
Claims (3)
1. a kind of blast furnace gas dry dusting system online ash removal method is it is characterised in that include step:
Step one, closes inlet valve and outlet valve；
Step 2, opens top diffusion valve；
Step 3, when inner barrel pressure is less than cylinder inlet pressure and the difference of inner barrel pressure and cylinder inlet pressure Jie
When between 80kpa to 120kpa, open described inlet valve；
Step 4, when inner barrel pressure is less than cylinder inlet pressure and the difference of inner barrel pressure and cylinder inlet pressure Jie
When between 20kpa to 30kpa, close described top diffusion valve；
Step 5, observes the pressure of described inner barrel and described cylinder inlet pressure, if described inner barrel pressure and institute
State cylinder inlet pressure phase to maintain an equal level, open described outlet valve；Otherwise repeat step one is to step 4, until described inner barrel pressure
Power is at a stalemate at ordinary times with described cylinder inlet pressure, opens described outlet valve.
2. blast furnace gas dry dusting system online ash removal method as claimed in claim 1 is it is characterised in that also include step
Six, open ash output valve, carry out blow tank conveying cleaning.
3. blast furnace gas dry dusting system online ash removal method as claimed in claim 2 is it is characterised in that described blast furnace coal
Air drying dust pelletizing system includes cylinder described at least two, repeat step one to step 6, one by one described cylinder is carried out successively
Deashing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510211979.1A CN104745755B (en) | 2015-04-29 | 2015-04-29 | Online dust cleaning method for blast furnace gas dry dust removing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510211979.1A CN104745755B (en) | 2015-04-29 | 2015-04-29 | Online dust cleaning method for blast furnace gas dry dust removing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104745755A CN104745755A (en) | 2015-07-01 |
| CN104745755B true CN104745755B (en) | 2017-01-18 |
Family
ID=53586002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510211979.1A Active CN104745755B (en) | 2015-04-29 | 2015-04-29 | Online dust cleaning method for blast furnace gas dry dust removing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104745755B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027295B (en) * | 2018-09-10 | 2019-09-06 | 启东市鑫宇冶金设备有限公司 | A kind of PE ball valve |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5935401B2 (en) * | 1980-08-28 | 1984-08-28 | 住友金属工業株式会社 | Blast furnace gas dry dust removal system for multiple blast furnaces |
| CN2383844Y (en) * | 1999-04-14 | 2000-06-21 | 北京市科林环保工程技术研究所 | Pulse bag-type duster for gas from blast furnace |
| CN102140562A (en) * | 2011-03-02 | 2011-08-03 | 柳州钢铁股份有限公司 | Dry deduster for blast furnace gas |
-
2015
- 2015-04-29 CN CN201510211979.1A patent/CN104745755B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104745755A (en) | 2015-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102519051B (en) | Flue gas spraying, purifying and heat recovering system for coal burning boiler | |
| CN104279759B (en) | A kind of gas heater and automatic cleaning method for carrying clearing function | |
| CN207270970U (en) | Boiler smoke minimum discharge high-pressure buffer desulfurizing dust-collector | |
| CN104745755B (en) | Online dust cleaning method for blast furnace gas dry dust removing system | |
| CN205128525U (en) | Prevent that horizontal cleaning tube from blockking up device | |
| CN109457069B (en) | Energy-saving and white-eliminating system for blast furnace slag granulation | |
| CN204901803U (en) | Production boiler | |
| CN204494473U (en) | The anti-blocking apparatus for ash of air pre-heater with rotary heating surface | |
| CN211133558U (en) | SCR automatic ash removal device of TFT glass kiln flue gas treatment system | |
| CN103537157B (en) | A kind of continuous casting smelting furnace burning exhaust treatment system | |
| CN104826438B (en) | A kind of dust and waste gas treatment device | |
| CN106422532B (en) | Cleaning shaft spark blowout | |
| CN203209177U (en) | Wet type electrostatic precipitator for blast furnace gas | |
| CN105003928A (en) | Waste gas processing device suitable for semiconductor manufacturing process | |
| CN204142064U (en) | A kind of flue gas heat-exchange unit | |
| CN104315908B (en) | A kind of flue gas heat-exchange unit and on-line cleaning method thereof | |
| CN206064007U (en) | A kind of blast furnace ironmaking dust arrester | |
| CN111994252A (en) | Exhaust discharge pipe capable of reducing blockage and working method thereof | |
| CN105833663A (en) | High-temperature flue gas cooling device | |
| CN204202185U (en) | A kind of gas heater carrying clearing function | |
| CN204338334U (en) | A kind of electric dust removal system installing ash bucket blow device additional | |
| CN220901313U (en) | Self-cleaning dust removal system for pipeline | |
| CN204897956U (en) | Improve wet process dust removal effect's dust pelletizing system | |
| CN211502847U (en) | Natural ventilation smoke tower device suitable for waste incineration power plant | |
| CN214680581U (en) | Online ash removal device for dust removal pipeline |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |