CN101974658B - Air bag type pressure regulating process for feeding of high-pressure smelting furnace - Google Patents
Air bag type pressure regulating process for feeding of high-pressure smelting furnace Download PDFInfo
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- CN101974658B CN101974658B CN2010105439178A CN201010543917A CN101974658B CN 101974658 B CN101974658 B CN 101974658B CN 2010105439178 A CN2010105439178 A CN 2010105439178A CN 201010543917 A CN201010543917 A CN 201010543917A CN 101974658 B CN101974658 B CN 101974658B
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- air bag
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Abstract
The invention relates to a pressure regulating process for the feeding of a high-pressure smelting furnace in the field of iron and steel industry, in particular to an air bag type pressure regulating process for the feeding of the high-pressure smelting furnace. The process is characterized by comprising the following steps of: 1, serially connecting an air bag type pressure regulating device at a pressure regulating outlet of a feeding tank; 2, when the high-pressure smelting furnace is just put on production, introducing high-pressure nitrogen into an air bag, then compressing the volume of a gas at one side of the feeding tank to ensure that the pressure of the feeding tank raises to be same with the pressure in the high-pressure smelting furnace, opening a discharging gate at the lower part of the feeding tank so that materials can be fed in the high-pressure smelting furnace; and 3, when pressure is discharged, directly dispersing high-pressure nitrogen in the air bag towards air to ensure that the volume of the gas at one side of the feeding tank is increased, after the pressure is reduced to atmosphere pressure, opening a receiving gate on the feeding tank so that the materials are fed in the feeding tank, and circulating the steps to complete the process of regulating the pressure. The process can achieve the purposes of zero emission of the gas in a pressure regulating process, complete internal circulating utilization of the gas, and no pollution to the environment.
Description
Technical field
The present invention relates to the reinforced used pressure of a kind of Iron And Steel Industry field mesohigh smelting furnace and regulate technology.
Background technology
The demand for development of Iron And Steel Industry is carried out process optimization from the whole production flow process, reaches energy-saving and cost-reducing, satisfies increasingly serious environmental requirement and cruel market competition, reduces cost, and improves the vitality of steel products.With the blast furnace iron-making process is example, and its weighing batch can is in all to press, diffuse under the alternation program and accomplishes in the blast furnace furnace roof equipment dress discharge process, all presses (pressurising) to need raw gas, half purified gas or N
2Pour in the weighing batch can, behind the charged through all press reach identical with the State of Blast Furnace internal pressure in case in State of Blast Furnace discharge; Must in atmosphere, discharge raw gas when diffusing, reach the pressure identical, satisfy the material feeding of weighing batch can with atmosphere; The process of diffusing has been discharged a large amount of coal gas and dust; Dust can be recovered into stove through cyclone dust removal, but this part coal gas emptying, the amount of diffusing of ton iron is at 6～8Nm
3, the annual molten iron output of China is about 600,000,000 tons, and (the blast furnace gas unit price is by 0.11 yuan/Nm just to reach 40 billion cubic meters via the coal gas amount of blast furnace furnace roof pressure-equalizing and discharging equipment exhausting
3Calculate, be about 4.4 hundred million Renminbi) more than, the wasting of resources has also caused severe contamination to atmosphere simultaneously greatly, and coal gas itself also has good economic worth.
In the emerging non-blast furnace ironmaking technology, what also all adopt is to regulate technology with the similar feed pressure of present blast furnace, and waste greatly.How person skilled all accomplishes zero release to reach energy-saving and cost-reducing, to be beneficial to environmental protection in research.
Summary of the invention
Problem to be solved by this invention is to above-mentioned prior art, proposes a kind of reinforced bladder-type pressure of high pressure smelting furnace that is used for and regulates technology, and this technology can be accomplished the coal gas zero release in the pressure regulate process, and the complete circulating inside of coal gas is used, and is free from environmental pollution.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: be used for the reinforced bladder-type pressure of high pressure smelting furnace and regulate technology, it is characterized in that it comprises the steps:
1) regulates outlet series connection one bladder-type pressure regulating device at the pressure of batch can 1;
2) when the high pressure smelting furnace has just put into production, the batch can 1 interior pressure of filling it up with material is normal pressure, opens with pressure and regulates the pressure adjusting trip valve 5 that exports the bladder-type pressure regulating device that links to each other; Open the high pressure nitrogen trip valve 9 on the nitrogen tube 13 that links to each other with air bag 7 again; In air bag 7, feed high pressure nitrogen, thereby high pressure nitrogen charges into the coal gas volume in the air bag 7 compression pressure equilibrators 6, and then the gas volume of compression batch can one side; Make the pressure of batch can be elevated to smelting furnace in behind the identical pressure; Close high pressure nitrogen trip valve 9, pressure adjusting trip valve 5, open the blanking lock 4 of batch can 1 bottom, can be to smelting furnace charge;
When 3) carrying out row pressure, open earlier with pressure and regulate the pressure adjusting trip valve 5 that exports the bladder-type pressure regulating device that links to each other, after; The nitrogen of opening again on the nitrogen bleeder 12 that links to each other with air bag 7 diffuses valve 8; High pressure nitrogen in the air bag 7 directly diffuses sky, makes the gas volume of batch can 1 one sides increase, after pressure is reduced to barometric point; Close nitrogen and diffuse valve 8 and pressure adjusting trip valve 5; After opening the material feeding lock 10 on the batch can 1, can in batch can 1, feed in raw material, so circulation is regulated technology to accomplish pressure.
Principle of the present invention is: the adjustment of batch can internal pressure is actually through the variation of the gas volume in compression and the release batch can and accomplishes; Gas its temperature in the pressure regulate process does not change in the batch can; And the gas in the outside in air bag cuts off fully; This condition satisfies the isothermal process of equation for ideal gases, and the principle formula is P
1V
1=P
2V
2
Therefore, the adjustment through the air bag volume changes the pressure of the gas volume size in the outside in the air bag with the adjustment both sides, makes that the pressure in the batch can reaches the technology controlling and process requirement; Satisfy and produce, be respectively nitrogen and raw gas inside and outside the air bag, airbag aeration during pressurising; The raw gas gas volume of compression batch can side carries out discharge after making the rising of batch can internal pressure reach the pressure in the stove, and air bag deflation during row pressure makes the volume of batch can side increase; Pressure reduces, and satisfies the batch can material feeding after dropping to barometric point.The adjustment of air bag volume is filled denitrogen gas and is realized through the serial connection high pressure nitrogen.
The invention has the beneficial effects as follows: fundamentally changed traditional pressure and regulated technology; Solved raw gas to empty emission problem; Replace the discharging of coal gas with the discharging of nitrogen, and simplified original technology, equipment, material, simple to operate; Reduce fixed investment, practiced thrift the production run cost.This method stopped fully coal gas in the pressure-equalizing and discharging process to the sky discharging, what the pressure regulate process was used all is nitrogen, accomplishes the coal gas zero release in the pressure regulate process, the complete circulating inside of coal gas is used, and is free from environmental pollution.The effect of this technology is obvious.
Description of drawings
Fig. 1 is the structural representation that is used for the reinforced bladder-type pressure regulating device of high pressure smelting furnace of the present invention;
Wherein: 1---batch can; 2---universal FlexbleJoint; 3---axial FlexbleJoint; 4---the blanking lock; 5---pressure is regulated trip valve; 6---pressure equaliser; 7---air bag; 8---nitrogen diffuses valve; 9---the high pressure nitrogen trip valve; 10---the material feeding lock, 11---pressure-equalizing passageway, 12---the nitrogen bleeder, 13---nitrogen tube.
Embodiment
Through accompanying drawing the present invention is done further explanation below, but can not be construed as limiting the invention.
Embodiment 1:
Be used for the reinforced bladder-type pressure of high pressure smelting furnace and regulate technology, it comprises the steps:
1) regulates outlet series connection one bladder-type pressure regulating device (, accomplishing pressure controlled process) at the pressure of batch can 1 through the volume size in the adjustment air bag as the terminal;
2) when the high pressure smelting furnace has just put into production; The batch can 1 interior pressure of filling it up with material is normal pressure; Open with the pressure that pressure is regulated the bladder-type pressure regulating device that outlet links to each other and regulate trip valve 5, open the high pressure nitrogen trip valve 9 on the nitrogen tube 13 that links to each other with air bag 7 again, to air bag 7 in the feeding high pressure nitrogen (the employing routine; Can adopt the high pressure nitrogen of 0.4-15Mpa), (pressure equaliser is for sealing thereby high pressure nitrogen charges into coal gas volume in the air bag 7 compression pressure equilibrators 6; It is big that the volume of air bag becomes), and then compression batch can one side (is the air bag outside; Be called the inboard in the air bag) gas volume, make the pressure of batch can be elevated to smelting furnace in behind the identical pressure, close high pressure nitrogen trip valve 9, pressure is regulated trip valve 5, opens the blanking lock 4 of batch can 1 bottom, can be to smelting furnace charge;
When 3) carrying out row pressure; Open earlier with pressure and regulate the pressure adjusting trip valve 5 that exports the bladder-type pressure regulating device that links to each other; After; The nitrogen of opening again on the nitrogen bleeder 12 that links to each other with air bag 7 diffuses valve 8, and the high pressure nitrogens in the air bag 7 directly diffuse sky, makes that batch can (being the weighing batch can) 1 one sides (are the air bag outside; The smaller volume of air bag) gas volume increases, and after pressure is reduced to barometric point, closes nitrogen and diffuses valve 8 and regulate trip valve 5 with pressure, open the material feeding lock 10 on the batch can 1 after, can to batch can 1 in, feed in raw material, so circulation is with completion pressure adjusting technology.
As shown in Figure 1, described bladder-type pressure regulating device comprises universal FlexbleJoint 2, axially FlexbleJoint 3, pressure are regulated trip valve 5, pressure equaliser 6, air bag 7, nitrogen and diffused valve 8, high pressure nitrogen trip valve 9, pressure-equalizing passageway 11, nitrogen bleeder 12, nitrogen tube 13; One end of pressure-equalizing passageway 11 is regulated outlet with the pressure of batch can 1 and is connected; The other end of pressure-equalizing passageway 11 and the pressure equaliser of sealing (or claiming pressure balancing tank) 6 is connected, and pressure-equalizing passageway 11 is provided with universal FlexbleJoint 2, axially FlexbleJoint 3, pressure are regulated trip valve 5; Air bag 7 is positioned at the cavity of pressure equaliser 6, and an end of the air bag 7 nitrogen bleeder 12 outer with being positioned at pressure equaliser 6 respectively through communication port, nitrogen tube 13 is connected, and (communication port can be located on the pressure equaliser 6; Nitrogen diffuses valve 8 and also can be directly arranged in nitrogen and diffuse on the communication port), nitrogen bleeder 12 is provided with nitrogen and diffuses valve 8, and the other end of nitrogen tube 13 is connected with source nitrogen (like high-pressure nitrogen bottle), and nitrogen tube 13 is provided with high pressure nitrogen trip valve 9.
The volume of described air bag 7 is 2～2.5 times of the volumetrical of batch can 1.
Claims (3)
1. be used for the reinforced bladder-type pressure of high pressure smelting furnace and regulate technology, it is characterized in that it comprises the steps:
1) regulates outlet series connection one bladder-type pressure regulating device at the pressure of batch can (1);
2) when the high pressure smelting furnace has just put into production; The interior pressure of batch can (1) of filling it up with material is normal pressure; Open with pressure and regulate the pressure adjusting trip valve (5) that exports the bladder-type pressure regulating device that links to each other, open the high pressure nitrogen trip valve (9) on the nitrogen tube (13) that links to each other with air bag (7) again, in air bag (7), feed high pressure nitrogen; High pressure nitrogen charges into air bag (7) thereby the coal gas volume in the compression pressure equilibrator (6); And then the gas volume of compression batch can one side, make the pressure of batch can be elevated to smelting furnace in behind the identical pressure, close high pressure nitrogen trip valve (9), pressure is regulated trip valve (5); Open the blanking lock (4) of batch can (1) bottom, can be to smelting furnace charge;
When 3) carrying out row pressure, open earlier with pressure and regulate the pressure adjusting trip valve (5) that exports the bladder-type pressure regulating device that links to each other, after; The nitrogen of opening again on the nitrogen bleeder (12) that links to each other with air bag (7) diffuses valve (8); High pressure nitrogen in the air bag (7) directly diffuses sky, makes the gas volume of batch can (1) one side increase, after pressure is reduced to barometric point; Close nitrogen and diffuse valve (8) and pressure adjusting trip valve (5); After opening the material feeding lock (10) on the batch can (1), can in batch can (1), feed in raw material, so circulation is regulated technology to accomplish pressure;
Described bladder-type pressure regulating device comprises that pressure adjusting trip valve (5), pressure equaliser (6), air bag (7), nitrogen diffuse valve (8), high pressure nitrogen trip valve (9), pressure-equalizing passageway (11), nitrogen bleeder (12), nitrogen tube (13); One end of pressure-equalizing passageway (11) is regulated outlet with the pressure of batch can (1) and is connected, and the other end of pressure-equalizing passageway (11) is connected with the pressure equaliser (6) of sealing, and pressure-equalizing passageway (11) is provided with pressure and regulates trip valve (5); Air bag (7) is positioned at the cavity of pressure equaliser (6); Air bag (7) the nitrogen bleeder (12) outer with being positioned at pressure equaliser (6) respectively through communication port, an end of nitrogen tube (13) are connected; Nitrogen bleeder (12) is provided with nitrogen and diffuses valve (8); The other end of nitrogen tube (13) is connected with source nitrogen, and nitrogen tube (13) is provided with high pressure nitrogen trip valve (9).
2. the reinforced bladder-type pressure of high pressure smelting furnace that is used for according to claim 1 is regulated technology, it is characterized in that: the volume of described air bag (7) is 2～2.5 times of the volumetrical of batch can (1).
3. the reinforced bladder-type pressure of high pressure smelting furnace that is used for according to claim 1 is regulated technology, it is characterized in that: pressure-equalizing passageway (11) is provided with universal FlexbleJoint (2) and axial FlexbleJoint (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105439178A CN101974658B (en) | 2010-11-15 | 2010-11-15 | Air bag type pressure regulating process for feeding of high-pressure smelting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105439178A CN101974658B (en) | 2010-11-15 | 2010-11-15 | Air bag type pressure regulating process for feeding of high-pressure smelting furnace |
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| Publication Number | Publication Date |
|---|---|
| CN101974658A CN101974658A (en) | 2011-02-16 |
| CN101974658B true CN101974658B (en) | 2012-05-23 |
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| CN2010105439178A Expired - Fee Related CN101974658B (en) | 2010-11-15 | 2010-11-15 | Air bag type pressure regulating process for feeding of high-pressure smelting furnace |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102816882B (en) * | 2011-06-08 | 2013-10-16 | 郭楚昊 | Recovery apparatus for exhaust pressure gas |
| CN102337366A (en) * | 2011-07-20 | 2012-02-01 | 中冶南方工程技术有限公司 | Roller extrusion air bag type blast furnace top pressure-equalizing bleeding gas recovering device |
| CN102337363A (en) * | 2011-07-20 | 2012-02-01 | 中冶南方工程技术有限公司 | Process for recovering coal gas in equalizing and relieving process of furnace top of blast furnace in mode of squeezing air bag by roller |
| CN104762430B (en) * | 2015-01-05 | 2017-09-29 | 中冶南方工程技术有限公司 | The furnace top material tank for blast furnace and its charging process that need not be diffused |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH09324206A (en) * | 1996-04-02 | 1997-12-16 | Nippon Steel Corp | Method for controlling rate of blowing pulverized powder to blast furnace and pulverized coal blowing device |
| CN101768648A (en) * | 2009-12-30 | 2010-07-07 | 中冶南方工程技术有限公司 | Blast furnace top pressure control system adopting gas dry-method dust-removal device |
| CN101875988A (en) * | 2010-07-30 | 2010-11-03 | 中冶南方工程技术有限公司 | Pressure-equalizing and discharging process for J-shaped sealing water pipe type blast furnace top |
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| CN101974658A (en) | 2011-02-16 |
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Granted publication date: 20120523 Termination date: 20131115 |