CN110317911A - Blast furnace medium-capital overhauling quickly draws coal gas method after going into operation - Google Patents
Blast furnace medium-capital overhauling quickly draws coal gas method after going into operation Download PDFInfo
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- CN110317911A CN110317911A CN201910543564.2A CN201910543564A CN110317911A CN 110317911 A CN110317911 A CN 110317911A CN 201910543564 A CN201910543564 A CN 201910543564A CN 110317911 A CN110317911 A CN 110317911A
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- blast furnace
- coal gas
- gas
- going
- dust
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
-
- 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
- C21B7/22—Dust arresters
-
- C21B2100/02—
Abstract
Quickly draw coal gas method after going into operation the present invention relates to blast furnace medium-capital overhauling, belong to Blast Furnace Iron-making Production Technology field, comprising the following steps: installs coal gas diffusing device additional on the clean coal gas branch pipe before dry all cabinet clean coal gas butterfly valves of dedusting；Blast furnace guides to blast furnace gas from dry dust-removing box clean coal gas branch pipe from blast furnace gas pipeline network before going into operation；After blast furnace ignition blow-on, it is stepped up air quantity, when air quantity and top temperature reach target value, starts to draw coal gas；Blast furnace gas successively passes through gravitational precipitator, coal gas dust removal cabinet and by the gas bleeding valve emission coal gas at the top of dust-removing box.Blast furnace medium-capital overhauling provided by the invention quickly draws coal gas method after going into operation, and substantially shortens the time that blast furnace gas is introduced to gaspipe network, improves production security.
Description
Technical field
Quickly draw coal gas method after going into operation the present invention relates to blast furnace medium-capital overhauling, belongs to Blast Furnace Iron-making Production Technology field.
Background technique
Blast furnace carry out it is big or middle repair operation after, need in time by the gas safety of generation, smoothly introducing company's gas pipe
Net reduces the coal gas diffusion time, while being conducive to the fast quick-recovery of conditions of blast furnace, improves coal gas and utilizes.Because coal gas have it is toxic,
Therefore inflammable and explosive special nature draws in course of gas that there are great security risks, while when introducing blast furnace gas
Gaspipe network is the key factor that blast furnace restores speed." forward direction " is mostly used to draw coal gas method greatly at this stage, when needing longer
Between, during which coal gas largely diffuses, and waste of energy while pollutes environment, while extending the recovery time of blast furnace.
Summary of the invention
Quickly draw coal gas method after going into operation the object of the present invention is to provide blast furnace medium-capital overhauling, substantially shortens and draw blast furnace gas
Enter the time of gaspipe network, improves production security.
To achieve the goals above, the technical solution adopted by the present invention is that:
Blast furnace medium-capital overhauling quickly draws coal gas method after going into operation, and includes the following steps,
1), coal gas diffusing device is installed additional on the clean coal gas branch pipe before dry all cabinet clean coal gas butterfly valves of dedusting；
2), blast furnace guides to blast furnace gas from dry dust-removing box clean coal gas branch pipe from blast furnace gas pipeline network before going into operation；
3), after blast furnace ignition blow-on, it is stepped up air quantity, when air quantity and top temperature reach target value, starts to draw coal gas；
4), blast furnace gas successively passes through gravitational precipitator, coal gas dust removal cabinet, and passes through the gas bleeding valve at the top of dust-removing box
Emission coal gas.
Technical solution of the present invention further improvement lies in that: in step 1), coal gas diffusing device include gas bleeding valve and
Probe tube.
Technical solution of the present invention further improvement lies in that: in step 1), from all cabinet clean coal gas branch pipe bleeding devices
Sampling hole does explosion test no less than three times, until qualification.
Technical solution of the present invention further improvement lies in that: in step 2, blast furnace go into operation before blast furnace gas is guided to for 24 hours it is dry
At dust-removing box clean coal gas branch pipe.
Technical solution of the present invention further improvement lies in that: the target value of air quantity and top temperature is in step 3), air quantity
Reach 50% or more of normal air quantity and top temperature reaches 150 DEG C or more.
Technical solution of the present invention further improvement lies in that: in step 4), blast furnace in drawing course of gas, open by high furnace side
Gravitational precipitator intercepter valve (IV) simultaneously closes off bleeding valve；Open the purified gas butterfly of all dust-removing boxs in coal gas dust removal housing area
Valve.
Technical solution of the present invention further improvement lies in that: in step 4), blast furnace gas is diffused through gas bleeding valve, every
Explosion test is done no less than three times in the dust measuring hole of a coal gas dust removal cabinet, and after each dust measuring hole is qualified, blast furnace gas is simultaneously
Enter blast furnace gas main pipe net.
By adopting the above-described technical solution, the technical effect that the present invention obtains has:
Blast furnace medium-capital overhauling provided by the invention quickly draws coal gas method after going into operation, and is that completely new big or middle repair of blast furnace of one kind draws coal gas
Method, relatively traditional " forward direction " draw coal gas method, save the time, reduce the blast furnace gas diffusing time, are conducive to conditions of blast furnace
Fast quick-recovery.
Blast furnace medium-capital overhauling provided by the invention quickly draws coal gas method after going into operation, and substantially shortens the blast furnace gas diffusing time,
The high coal gas of recycling calorific capacity as much as possible, reduces atmosphere pollution, reduces thermal losses, shortens blast furnace and restores normally to smelt
Time.
Blast furnace medium-capital overhauling provided by the invention quickly draws coal gas method after going into operation, and practical operation is simple and easy；The coal of installation
The manufacture of gas bleeding device is simple, and " forward direction " before bleed workload is compared is drawn coal gas method and greatly reduced, and labor intensity is substantially
Degree reduces.
Detailed description of the invention
Fig. 1 is the flow chart for quickly drawing coal gas method after blast furnace medium-capital overhauling of the invention is gone into operation.
Specific embodiment
With reference to the accompanying drawing 1 and specific embodiment the present invention is described in further details.
Blast furnace medium-capital overhauling of the invention as shown in Fig. 1 quickly draws the flow chart of coal gas method after going into operation, the present invention is public
It has opened and has quickly drawn coal gas method after a kind of blast furnace medium-capital overhauling is gone into operation, this method is used for blast furnace ironmaking.Here is specific embodiment:
Blast furnace medium-capital overhauling disclosed by the invention quickly draws coal gas method after going into operation, specifically includes the following steps:
1), coal gas diffusing device is installed additional on the clean coal gas branch pipe before dry all cabinet clean coal gas butterfly valves of dedusting.
The coal gas diffusing device includes gas bleeding valve and probe tube.Specifically, the coal gas diffusing device includes setting
Set the gas bleeding valve on clean coal gas branch pipe, and the probe tube connecting with gas bleeding valve exit seal；The probe tube
Top is provided with sampling hole.
Further, explosion test is done no less than three times from all cabinet clean coal gas branch pipe bleeding device sampling holes, until
Until qualification.
2), blast furnace guides to blast furnace gas from dry dust-removing box clean coal gas branch pipe from blast furnace gas pipeline network before going into operation.
Specifically, blast furnace for 24 hours guides to blast furnace gas at dry dust-removing box clean coal gas branch pipe before going into operation.It is provided in the present invention
Embodiment in, the time interval of guiding to blast furnace gas at dry dust-removing box clean coal gas branch pipe can be for 24 hours before blast furnace is gone into operation
Left and right, explosion test can be taken turns doing from all cabinet clean coal gas branch pipe bleeding device sampling holes by closing on timing node, until
Until qualification.
3), after blast furnace ignition blow-on, it is stepped up air quantity, when air quantity and top temperature reach target value, starts to draw coal
Gas.
In embodiment provided by the invention, the target value of air quantity and top temperature is that air quantity reaches the 50% of normal air quantity
Above and top temperature reaches 150 DEG C or more.
4), blast furnace gas successively passes through gravitational precipitator, coal gas dust removal cabinet, and is put by the coal gas at the top of dust-removing box
Dissipate valve emission coal gas.
Blast furnace in drawing course of gas, open gravitational precipitator intercepter valve (IV) and simultaneously close off bleeding valve by high furnace side；Coal gas
Open the clean coal gas butterfly valve of all dust-removing boxs in dust-removing box region.
Further, blast furnace gas is diffused through gas bleeding valve, does outburst examination in the dust measuring hole of each coal gas dust removal cabinet
It tests no less than three times, after each dust measuring hole is qualified, blast furnace gas is incorporated to blast furnace gas main pipe net.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (7)
1. blast furnace medium-capital overhauling quickly draws coal gas method after going into operation, it is characterised in that: include the following steps,
1), coal gas diffusing device is installed additional on the clean coal gas branch pipe before dry all cabinet clean coal gas butterfly valves of dedusting；
2), blast furnace guides to blast furnace gas from dry dust-removing box clean coal gas branch pipe from blast furnace gas pipeline network before going into operation；
3), after blast furnace ignition blow-on, it is stepped up air quantity, when air quantity and top temperature reach target value, starts to draw coal gas；
4), blast furnace gas successively passes through gravitational precipitator, coal gas dust removal cabinet, and passes through the gas bleeding valve at the top of dust-removing box
Emission coal gas.
2. blast furnace medium-capital overhauling according to claim 1 quickly draws coal gas method after going into operation, it is characterised in that: in step 1),
Coal gas diffusing device includes gas bleeding valve and probe tube.
3. blast furnace medium-capital overhauling according to claim 1 quickly draws coal gas method after going into operation, it is characterised in that: in step 1),
Explosion test is done no less than three times from all cabinet clean coal gas branch pipe bleeding device sampling holes, until qualification.
4. blast furnace medium-capital overhauling according to claim 1 quickly draws coal gas method after going into operation, it is characterised in that: in step 2,
Blast furnace for 24 hours guides to blast furnace gas at dry dust-removing box clean coal gas branch pipe before going into operation.
5. blast furnace medium-capital overhauling according to claim 1 quickly draws coal gas method after going into operation, it is characterised in that: step 3) apoplexy
The target value of amount and top temperature is that air quantity reaches 50% or more of normal air quantity and top temperature reaches 150 DEG C or more.
6. blast furnace medium-capital overhauling according to claim 1 quickly draws coal gas method after going into operation, it is characterised in that: in step 4),
Blast furnace in drawing course of gas, open gravitational precipitator intercepter valve (IV) and simultaneously close off bleeding valve by high furnace side；Coal gas dust removal cabinet
Open the clean coal gas butterfly valve of all dust-removing boxs in region.
7. blast furnace medium-capital overhauling according to claim 1 quickly draws coal gas method after going into operation, it is characterised in that: in step 4),
Blast furnace gas is diffused through gas bleeding valve, does explosion test no less than three times in the dust measuring hole of each coal gas dust removal cabinet, until
After the qualification of each dust measuring hole, blast furnace gas is incorporated to blast furnace gas main pipe net.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910543564.2A CN110317911B (en) | 2019-06-21 | 2019-06-21 | Method for quickly introducing coal gas after blast furnace overhaul and mid-term delivery |
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| CN201910543564.2A CN110317911B (en) | 2019-06-21 | 2019-06-21 | Method for quickly introducing coal gas after blast furnace overhaul and mid-term delivery |
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| CN110317911A true CN110317911A (en) | 2019-10-11 |
| CN110317911B CN110317911B (en) | 2021-03-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111020086A (en) * | 2019-12-30 | 2020-04-17 | 山东钢铁集团日照有限公司 | Method for quickly introducing coal gas during blow-in of blast furnace |
| CN114921599A (en) * | 2022-05-23 | 2022-08-19 | 广东韶钢松山股份有限公司 | Method for introducing coal gas by blowing in blast furnace |
| CN115820955A (en) * | 2022-11-11 | 2023-03-21 | 日照钢铁控股集团有限公司 | Process method for quickly introducing coal gas during blow-in of blast furnace |
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| CN205062095U (en) * | 2015-10-29 | 2016-03-02 | 中冶华天南京工程技术有限公司 | Blast furnace furnace roof material jar diffuses gas purifying, recovery system |
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2019
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Patent Citations (6)
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| JP2001276536A (en) * | 2000-03-29 | 2001-10-09 | Hitachi Zosen Corp | Dry dust collecting apparatus for blast furnace |
| CN101260322A (en) * | 2006-08-29 | 2008-09-10 | 包头钢铁（集团）有限责任公司 | Blast furnace gas dust removing device and technique by dry method |
| CN102337364A (en) * | 2011-07-20 | 2012-02-01 | 中冶南方工程技术有限公司 | Device for recovering coal gas in equalizing and relieving process of furnace top of blast furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111020086A (en) * | 2019-12-30 | 2020-04-17 | 山东钢铁集团日照有限公司 | Method for quickly introducing coal gas during blow-in of blast furnace |
| CN114921599A (en) * | 2022-05-23 | 2022-08-19 | 广东韶钢松山股份有限公司 | Method for introducing coal gas by blowing in blast furnace |
| CN115820955A (en) * | 2022-11-11 | 2023-03-21 | 日照钢铁控股集团有限公司 | Process method for quickly introducing coal gas during blow-in of blast furnace |
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| CN110317911B (en) | 2021-03-26 |
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