CN104745755A - 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
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- CN104745755A CN104745755A CN201510211979.1A CN201510211979A CN104745755A CN 104745755 A CN104745755 A CN 104745755A CN 201510211979 A CN201510211979 A CN 201510211979A CN 104745755 A CN104745755 A CN 104745755A
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- pressure
- cylindrical shell
- blast furnace
- valve
- barrel
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- 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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- 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
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- C21B2100/02—
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- 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-removal system technical field, particularly relate to a kind of blast furnace gas dry dusting system online ash removal method.
Background technology
Blast furnace gas dry dusting system mainly purifies the raw gas that the production processes such as blast furnace ironmaking produce, and reduces the pollutant load in the coal gas discharged.In blast furnace gas dry dusting system, nonaqueous dust cleaner is its main cleaning apparatus, and nonaqueous dust cleaner mainly comprises the cylindrical shell being provided with inlet valve, outlet valve and top diffusion valve.
Along with the development of bad ore deposit low temperature ironmaking technology, in blast furnace gas, alkali metal content, water content increase severely, the viscosity and the humidity that enter dust in the raw gas in nonaqueous dust cleaner are larger, within shorter working time, dust can stick and hardens on the pipeline at the inlet valve place of nonaqueous dust cleaner, blocking pipe, has had a strong impact on the normal operation of blast furnace.
Therefore, in order to carry out deashing process to pipeline, existing method is blast furnace staying, is disassembled by blocked pipeline, then carries out deashing process, and the pipeline cleaned out is re-started installation.
But, because needs are cleared up after pipeline dismounting again, need to force blast furnace staying in scale removal process, cause blast furnace normally not produce; And due to the problem of dust blocking pipe namely can be there is within shorter working time, therefore need to clear up pipeline frequently, and cleaning each time all can impact the normal production of blast furnace, thus cause production efficiency to reduce.
Therefore, how blowing ash cleaning online to pipeline is those skilled in the art's technical issues that need to address.
Summary of the invention
In view of this, the object of the application is to provide a kind of blast furnace gas dry dusting system online ash removal method, can avoid blast furnace staying in deashing process, ensures the normal production of blast furnace.
This application provides a kind of blast furnace gas dry dusting system online ash removal method, comprise step:
Step one, closes inlet valve and outlet valve;
Step 2, opens top diffusion valve;
Step 3, when inner barrel pressure lower than cylindrical shell intake pressure and the difference of inner barrel pressure and cylindrical shell intake pressure between 80kPa to 120kPa time, open inlet valve;
Step 4, when inner barrel pressure lower than cylindrical shell intake pressure and the difference of inner barrel pressure and cylindrical shell intake pressure between 20kPa to 30kPa time, close described top diffusion valve;
Step 5, observes the pressure of described inner barrel and described cylindrical shell intake pressure, if described inner barrel pressure maintains an equal level mutually with described cylindrical shell intake pressure, opens described outlet valve; Otherwise repeating step one to step 4, until described inner barrel pressure and described cylindrical shell intake pressure at ordinary times at a stalemate, open described outlet valve.
Preferably, also comprise step 6, open ash output valve, carry out blow tank conveying cleaning.
Preferably, described blast furnace gas dry dusting system comprises at least two described cylindrical shells, and repeating step one to step 6 carries out deashing to described cylindrical shell successively one by one.
A kind of blast furnace gas dry dusting system online ash removal method that the application provides comprises the steps:
Step one, closes inlet valve and outlet valve;
Step 2, opens top diffusion valve;
Step 3, when inner barrel pressure lower than cylindrical shell intake pressure and the difference of inner barrel pressure and cylindrical shell intake pressure between 80kPa to 120kPa time, open described inlet valve;
Step 4, when inner barrel pressure lower than cylindrical shell intake pressure and the difference of inner barrel pressure and cylindrical shell intake pressure between 20kPa to 30kPa time, close described top diffusion valve;
Step 5, observes pressure and the cylindrical shell intake pressure of inner barrel, if inner barrel pressure maintains an equal level mutually with cylindrical shell intake pressure, opens described outlet valve; Otherwise repeating step one to step 4, until inner barrel pressure and cylindrical shell intake pressure at ordinary times at a stalemate, open outlet valve.
So, by closing inlet valve and outlet valve, and then open top diffusion valve, can ensure to there is larger pressure reduction between cylindrical shell intake pressure and inner barrel pressure, and then open inlet valve, utilize pressure reduction between the two that the dust of the deposition in inlet branch is poured inner barrel, thus the object that realization is cleared up inlet branch, carry out compared with dust stratification with pipeline being disassembled in prior art, by the blast furnace gas dry dusting system online ash removal method adopting the application to provide, utilize the pressure reduction between cylindrical shell intake pressure and inner barrel pressure, increase the flow velocity of pipeline internal medium (being specially flue gas) instantaneously, medium is in flow process, the dust be deposited in inlet branch can be poured inner barrel, thus realize clearing up inlet branch, because whole deashing process does not need blast furnace staying, thus can guarantee that blast furnace is normally produced.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of nonaqueous dust cleaner in a kind of embodiment that Fig. 1 provides for the application;
Wherein, in Fig. 1:
Cylindrical shell 1, inlet valve 2, outlet valve 3, top diffusion valve 4, inlet branch 5, ash output valve 6, storehouse pump 7.
Embodiment
The invention discloses a kind of blast furnace gas dry dusting system online ash removal method, blast furnace staying in deashing process can be avoided, ensure the normal production of blast furnace.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Please refer to Fig. 1, the structural representation of nonaqueous dust cleaner in a kind of embodiment that Fig. 1 provides for the application.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 cylindrical shell 1 internal pressure lower than cylindrical shell 1 intake pressure and the difference of cylindrical shell 1 internal pressure and cylindrical shell 1 intake pressure between 80kPa to 120kPa time, open inlet valve 2;
Step 4, when cylindrical shell 1 internal pressure lower than cylindrical shell 1 intake pressure and the difference of cylindrical shell 1 internal pressure and cylindrical shell 1 intake pressure between 20kPa to 30kPa time, close top diffusion valve 4;
Step 5, observes cylindrical shell 1 internal pressure and cylindrical shell 1 intake pressure, if cylindrical shell 1 internal pressure maintains an equal level mutually with cylindrical shell 1 intake pressure, determines that blocking is removed, opens outlet valve 3; Otherwise, repeating step one to step 4, until cylindrical shell 1 internal pressure and cylindrical shell 1 intake pressure at ordinary times at a stalemate, open outlet valve 3;
So, by closing inlet valve 2 and outlet valve 3, and then open top diffusion valve 4, can ensure to there is larger pressure reduction between cylindrical shell 1 intake pressure and cylindrical shell 1 internal pressure, and then open inlet valve 2, pressure reduction is between the two utilized the dust of the deposition in inlet branch 5 to be poured cylindrical shell 1 inner, thus the object that realization is cleared up inlet branch 5, carry out compared with dust stratification cleans with pipeline being disassembled in prior art, by the blast furnace gas dry dusting system online ash removal method adopting the application to provide, utilize the pressure reduction between cylindrical shell 1 intake pressure and cylindrical shell 1 internal pressure, increase the flow velocity of pipeline internal medium (being specially flue gas) instantaneously, medium is in flow process, the dust be deposited in inlet branch 5 can be poured cylindrical shell 1 inner, thus realize clearing up inlet branch 5, because whole deashing process does not need blast furnace staying, thus can guarantee that blast furnace is normally produced.
Meanwhile, owing to not needing to be dismantled by pipeline, can avoid, in deashing process, the phenomenons such as airborne dust occur, and then the spatter property of Working environment can be guaranteed.
It should be noted that, in order to ensure the thoroughness of cleaning, above-mentioned steps can with repetitive operation, general repetition 1 to 4 aforesaid operations, the object of thoroughly being cleaned by dust stratification can be reached, certainly, also do not get rid of the number of times of the condition of production determination repetitive operation according to reality.
In addition, in order to recycle dust, in this embodiment, also comprise step 6, after above-mentioned steps completes, open ash output valve 6, carry out the defeated ash cleaning of storehouse pump 7, dust collected in nonaqueous dust cleaner so can be ensured to export, then dust is processed, again utilize.
In addition, because blast furnace gas dry dusting system comprises at least two cylindrical shells, therefore repeating step one to step 6, carries out deashing to cylindrical shell 1 successively one by one.So, by adopting the mode of one by one cylindrical shell being carried out to deashing, in blast furnace normal course of operation, each dust deposited in pipeline of dust-removal system can be removed, avoid blast furnace staying, ensureing normally to produce.
In this specification sheets, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (3)
1. a blast furnace gas dry dusting system online ash removal method, is characterized in that, comprise step:
Step one, closes inlet valve and outlet valve;
Step 2, opens top diffusion valve;
Step 3, when inner barrel pressure lower than cylindrical shell intake pressure and the difference of inner barrel pressure and cylindrical shell intake pressure between 80kPa to 120kPa time, open described inlet valve;
Step 4, when inner barrel pressure lower than cylindrical shell intake pressure and the difference of inner barrel pressure and cylindrical shell intake pressure between 20kPa to 30kPa time, close described top diffusion valve;
Step 5, observes the pressure of described inner barrel and described cylindrical shell intake pressure, if described inner barrel pressure maintains an equal level mutually with described cylindrical shell intake pressure, opens described outlet valve; Otherwise repeating step one to step 4, until described inner barrel pressure and described cylindrical shell intake pressure at ordinary times at a stalemate, open described outlet valve.
2. blast furnace gas dry dusting system online ash removal method as claimed in claim 1, is characterized in that, also comprise step 6, 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, it is characterized in that, described blast furnace gas dry dusting system comprises at least two described cylindrical shells, and repeating step one to step 6 carries out deashing to described cylindrical shell successively one by one.
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 |
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| 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 |
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| CN104745755A true CN104745755A (en) | 2015-07-01 |
| CN104745755B CN104745755B (en) | 2017-01-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027295A (en) * | 2018-09-10 | 2018-12-18 | 赵桂凤 | A kind of PE ball valve |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5743912A (en) * | 1980-08-28 | 1982-03-12 | Sumitomo Metal Ind Ltd | Dry-type dust removing system for blast furnace gas of plural 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
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5743912A (en) * | 1980-08-28 | 1982-03-12 | Sumitomo Metal Ind Ltd | Dry-type dust removing system for blast furnace gas of plural 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027295A (en) * | 2018-09-10 | 2018-12-18 | 赵桂凤 | A kind of PE ball valve |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN104745755B (en) | 2017-01-18 |
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