CN1597995A - Method and apparatus for raising temp. of gas in furnace - Google Patents
Method and apparatus for raising temp. of gas in furnace Download PDFInfo
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- CN1597995A CN1597995A CN 200410024560 CN200410024560A CN1597995A CN 1597995 A CN1597995 A CN 1597995A CN 200410024560 CN200410024560 CN 200410024560 CN 200410024560 A CN200410024560 A CN 200410024560A CN 1597995 A CN1597995 A CN 1597995A
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Abstract
The invention relates to the method of increasing the temperatuer of the blast furnace gas and its device. It is mixing gas with air and burning and mixing the wasted gas with the gas. increasing the temperature of the blast furnace for reaching to scale of the dust catcher. A gas heat riser includes pipeline air line air nozzle and combustion chamber. The combustion air inlets the air nozle through the air line, mixes with the gas which inlets the combustion chamber through the gas intake using the high temperature and heat of the combustion air or the portfire to light.
Description
Affiliated technical field
The invention belongs to metallurgical technology field, specifically a kind of blast-furnace gas heating-up method and apparatus.
Background technology
Iron-smelting blast furnace is discharged the raw gas that contains the high density dust in a large number from furnace roof in process of production, for the utilization of coal gas, need purify coal gas.Purifying method has 2 kinds of dry method dust and wet dedustings.The technological process of wet dedusting is: the raw gas from the blast furnace furnace roof is discharged, behind gravitational precipitator or tornado dust collector rough dusting, enter washing tower and Venturi meter, and in washing tower and Venturi meter, be subjected to the flushing of water smoke and thin current and purify.The sewage that contains dust after the washing is separated mud by separation system, and water turns back to washing tower and Venturi meter again by water pump and pipeline.Dry method dust is divided into 2 kinds, and a kind of is dry-method bag-type dust collecting, and another kind is the dry method electric precipitation.The technological process of dry-method bag-type dust collecting is: the raw gas from the blast furnace furnace roof is discharged, behind gravitational precipitator or tornado dust collector rough dusting, enter sack cleaner, and utilize the filteration of cloth bag directly dust separation to be come out.The technological process of dry method electric precipitation is: the raw gas from the blast furnace furnace roof is discharged, behind gravitational precipitator or tornado dust collector rough dusting, enter electric precipitator, and utilize the high pressure static electricity effect that dust separation is come out.Compare with wet dedusting, dry method dust only power loss just reduces 30%～35%.Outstanding advantages such as that dry method dust has is energy-conservation, water saving, environmental protection, gas purification is effective, economic benefit is huge have good development prospect.But for the dry-method bag-type dust collecting device, because the restriction of cloth bag material etc., it is 100 ℃～250 ℃ that the gas temperature that enters the dry-method bag-type dust collecting device requires.Gas temperature is too high, can burn out cloth bag; Gas temperature is low excessively, can make moisture dewfall contained in the coal gas, thereby the viscosity that makes dust become is very strong, sticks on the cloth bag, makes fly-ash separator airtight, causes stopping production or coal gas to be forced to diffuse.For the dry method electric precipitator, it is 100 ℃～300 ℃ that the gas temperature that enters the dry method electric precipitator requires.Gas temperature is too high, can make fly-ash separator structural distortion; Gas temperature is low excessively, can make moisture dewfall contained in the coal gas, thereby makes the insulation of electric precipitator descend, and voltage of electric field reduces, and makes the efficiency of dust collection of electric precipitator descend significantly, and blast furnace stops production or coal gas is forced to diffuse.During blast furnace is produced,, gas temperature can occur and cross low or too high situation because the fluctuation of stove ore deposit makes that the temperature variation of the raw gas that the blast furnace furnace roof is discharged is bigger.Adjust the chronic of furnace top gas temperature by blast furnace operating.Therefore, when gas temperature was too high, normally position spray coolings such as gravitational precipitator between nonaqueous dust cleaner and blast furnace or gas line met the requirements gas temperature.But when gas temperature is lower than the temperature (100 ℃) of regulation, but can only be with coal gas diffusion.So just cause serious environmental to pollute, also wasted the valuable energy.
Summary of the invention
The object of the present invention is to provide a kind of can the mistake to heighten method of temperature when hanging down at gas temperature, and for realizing the device of this method.
The said coal gas temperature-rising method of the present invention is to realize like this, the coal gas heat riser is installed on the gas line before nonaqueous dust cleaner, it comprises the coal gas main channel, air line on the coal gas main channel, be installed in the air nozzle on the air line in the coal gas main channel, the combustion chamber, back up pad, seed element.Air nozzle is installed on the air line in the coal gas main channel, air line links to each other with the external air source pipeline, combustor exit directly communicates with the coal gas main channel, the import of coal gas main channel is connected with gas line from gravitational precipitator, the outlet of coal gas main channel is connected with the gas line that leads to nonaqueous dust cleaner, air line is used to provide combustion air, and combustion air can be that temperature is 800 ℃～1300 ℃ a high temperature combustion air, also can be normal temperature air.When using the normal temperature combustion air, combustion air mixes in the combustion chamber with the coal gas that enters the combustion chamber by the combustion chamber gas inlet, and utilize seed element igniting afterfire, high-temp waste gas after the burning is sneaked in the coal gas, the heat of its generation makes gas temperature raise, thereby temperature of gas is reached in the temperature range that nonaqueous dust cleaner allows.When using the high temperature combustion air, mounting points fire element not, the high temperature combustion air mixes in the combustion chamber with the coal gas that enters the combustion chamber by the combustion chamber gas inlet, utilize the high temperature and the heat ignition of high temperature combustion air, high-temp waste gas after the burning is sneaked in the coal gas, the heat of its generation makes gas temperature raise, thereby temperature of gas is reached in the temperature range that nonaqueous dust cleaner allows.
Compare prior art the present invention and have following advantage:
1, utilize the burning heat release of a spot of coal gas, the gas temperature that temperature is low excessively improves, and can accurately control the gas temperature that enters nonaqueous dust cleaner.
2, the simple structure of coal gas heat riser, cost is low, is convenient to promote.
Accompanying drawing 1 is a structure principle chart of the present invention.
Accompanying drawing 2 is another embodiment of structural principle of the present invention.
Accompanying drawing 3 is another embodiment of structural principle of the present invention.
Accompanying drawing 4 is another embodiment of structural principle of the present invention.
Below in conjunction with accompanying drawing equipment of the present invention is elaborated.
For realizing that the designed coal gas heat riser of the present invention is: this device comprises coal gas main channel 1, on coal gas main channel 1, be fixed with air line 2, air line 2 one ends are equipped with air nozzle 3, the other end links to each other with source of the gas pipeline 8, on coal gas main channel 1, fixedly mount combusters 5 with back up pad 6, one end of combustion chamber 5 has gas inlet 4, coal gas main channel 1 is led directly in the outlet of combustion chamber 5, the inwall of combustion chamber 5 lays refractory lining 9, isolator 14 is fixed on seed element 13 in the combustion chamber 5, and lead 15 provides power supply for seed element 13.1 two ends, coal gas main channel link to each other with gas line 7 respectively.Source of the gas pipeline 8 is used to provide combustion air.Combustion air can be a normal temperature air, also can be that temperature is 800 ℃～1300 ℃ a high temperature combustion air.When using the high temperature combustion air, not mounting points fire element 13, isolator 14 and lead 15.
Principle of work of the present invention:
In accompanying drawing 1, the combustion chamber is built-in.In using the coal gas system of dry dedusting technology, when gas temperature just often, coal gas flows through from coal gas main channel 1, the valve closes on the source of the gas pipeline 8, combustion air do not enter air nozzle 3.When gas temperature is lower than the lower limit temperature of dry dedusting technology regulation, valve open on the source of the gas pipeline 8, when using the high temperature combustion air, temperature is that 800 ℃～1300 ℃ high temperature combustion air enters air nozzle 3 by source of the gas pipeline 8, air line 2, mix with the part coal gas that enters in the combustion chamber 5 from gas inlet 4 in air nozzle 3 outlets, utilize the high temperature and the heat ignition of high temperature combustion air; When using the normal temperature combustion air, combustion air enters air nozzle 3 by source of the gas pipeline 8, air line 2, mix with the part coal gas that enters in the combustion chamber 5 from gas inlet 4 in air nozzle 3 outlets, lead 15 energisings, seed element 13 produces electric arc and makes coal gas and the ignition of Air mixing gas, and the coal gas that burning is consumed accounts for 0.5%～2.5% of coal gas total amount.The high-temp waste gas that burning produces mixes with most of unburn coal gas of process coal gas main channel 1, and gas temperature is raise.Can change the combustion-supporting air quantity that enters coal gas main channel 1 by the aperture of regulating the valve on the source of the gas pipeline 8, thereby regulate the gas temperature of coal gas main channel 1 outlet, make it meet the needed temperature range of nonaqueous dust cleaner.
In accompanying drawing 2, the combustion chamber is an external placed type.Coal gas main channel 1 links with gas line 7, and combustion chamber 5 is installed in the outside of coal gas main channel 1, and the import of combustion chamber 5 links by pipeline 10 and coal gas main channel 1, and the outlet of combustion chamber 5 is by pipeline 11 straight-through coal gas main channels 1.A part of coal gas of coal gas main channel 1 is through pipeline 10, enter combustion chamber 5 from gas inlet 4 then, mix with the combustion air that enters combustion chamber 5 by source of the gas pipeline 8, air line 2, air nozzle 3, the arc ignition burning that utilizes the high temperature and the heat ignition of high temperature combustion air or utilize seed element 13 to produce, the inwall of combustion chamber lays refractory lining 9.High-temp waste gas after the burning directly enters coal gas main channel 1 by pipeline 11, mixes with coal gas in the coal gas main channel 1, makes mixed gas temperature rising, meets the needed temperature range of nonaqueous dust cleaner.The coal gas that burning is consumed accounts for 0.5%～2.5% of coal gas total amount.
In accompanying drawing 3, the combustion chamber also is an external placed type.Coal gas main channel 1 links with gas line 7, the spout of air nozzle 3 is made up of 3～20 spouts, circular array is 5 periphery in the combustion chamber, a part of coal gas of coal gas main channel 1 is through pipeline 10, enter combustion chamber 5 from gas inlet 4 then, with the air mixed that enters the combustion chamber by source of the gas pipeline 8, air line 2, annular air channel 12, air nozzle 3, the arc ignition burning that utilizes the high temperature and the heat ignition of high temperature combustion air or utilize seed element 13 to produce, the inwall of combustion chamber lays refractory lining 9.High-temp waste gas after the burning enters coal gas main channel 1 by pipeline 11, mixes with coal gas in the coal gas main channel 1, makes mixed gas temperature rising, meets the needed temperature range of nonaqueous dust cleaner.The coal gas that burning is consumed accounts for 0.5%～2.5% of coal gas total amount.
In accompanying drawing 4, combustion chamber 5 is integrated with coal gas main channel 1, and air nozzle 3 is arranged in the periphery of coal gas main channel 1 ringwise.Enter the combustion air of combustion chamber mixes with coal gas in the coal gas main channel 1 by source of the gas pipeline 8, air line 2, annular air channel 12, air nozzle 3, the arc ignition burning that utilizes the high temperature and the heat ignition of high temperature combustion air or utilize seed element 13 to produce, high-temp waste gas after the burning mixes with unburn coal gas by coal gas main channel 1, mixed gas temperature is raise, meet the needed temperature range of nonaqueous dust cleaner.The coal gas that burning is consumed accounts for 0.5%～2.5% of coal gas total amount.
In the gas dry-dedusting system that coal gas overbottom pressure turbine generators is not installed, use the present invention, burning sub-fraction coal gas and combustion exhaust are sneaked into coal gas inside, make caloric power of gas reduce by 0.6%～3%, but loss and the pollution having avoided whole coal gas to be diffused causing, than not using energy saving of system degree of the present invention to reach more than 97%, pollute and reduce 100%.In the dry-dedusting system that coal gas overbottom pressure turbine generators has been installed, improve the energy of gas temperature institute incendiary sub-fraction coal gas, in coal gas overbottom pressure turbine generators, obtain reclaiming, so there is not power loss, with do not use system of the present invention to compare, degree of power conservation reaches 100%, pollutes and reduces 100%.
Claims (8)
1, a kind of blast-furnace gas heating-up method, it is to make the burning of combustion gas and air mixed, and the high-temp waste gas after the burning is sneaked in the coal gas, and its heat that carries makes gas temperature raise, thereby the temperature of blast furnace gas is reached in the temperature range that nonaqueous dust cleaner allows.
2, be exclusively used in a kind of blast-furnace gas heating-up device of the described blast-furnace gas heating-up method of claim 1, it comprises coal gas main channel (1), combustion chamber (5), air line (2), air nozzle (3), it is characterized in that: coal gas main channel (1) is led directly in the outlet of combustion chamber (5).
3, a kind of blast-furnace gas heating-up device according to claim 2 is characterized in that: employed combustion air is 800 ℃～1300 ℃ warm air for the hotblast stove temperature after heating.
4, a kind of blast-furnace gas heating-up device according to claim 2, it is characterized in that: employed combustion air is a normal temperature air, and seed element (13) is installed in combustion chamber (5).
5, a kind of blast-furnace gas heating-up device according to claim 2 is characterized in that: combustion chamber (5) are installed in inside, coal gas main channel (1).
6, a kind of blast-furnace gas heating-up device according to claim 2 is characterized in that: combustion chamber (5) are installed in outside, coal gas main channel (1).
7, a kind of blast-furnace gas heating-up device according to claim 2, it is characterized in that: air nozzle (3) is arranged in the periphery of combustion chamber (5) ringwise.
8, a kind of blast-furnace gas heating-up device according to claim 2 is characterized in that: combustion chamber (5) are integrated with coal gas main channel (1), and air nozzle (3) is arranged in the periphery of coal gas main channel (1) ringwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410024560 CN1597995A (en) | 2004-08-16 | 2004-08-16 | Method and apparatus for raising temp. of gas in furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410024560 CN1597995A (en) | 2004-08-16 | 2004-08-16 | Method and apparatus for raising temp. of gas in furnace |
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| CN1597995A true CN1597995A (en) | 2005-03-23 |
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| CN 200410024560 Pending CN1597995A (en) | 2004-08-16 | 2004-08-16 | Method and apparatus for raising temp. of gas in furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451342A (en) * | 2013-09-05 | 2013-12-18 | 鞍钢股份有限公司 | Device and method for increasing temperature of blast furnace hot air |
| CN109385497A (en) * | 2018-11-21 | 2019-02-26 | 苏州大学 | A method of improving blast furnace top gas temperature in gravitational precipitator |
| CN111944982A (en) * | 2020-09-15 | 2020-11-17 | 大连万通能源装备有限公司 | Novel energy-saving consumption-reducing continuous type cast tube annealing furnace system |
| CN116516087A (en) * | 2023-05-11 | 2023-08-01 | 新疆八一钢铁股份有限公司 | Method for increasing temperature of top gas of hydrogen-rich carbon circulating oxygen blast furnace |
-
2004
- 2004-08-16 CN CN 200410024560 patent/CN1597995A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451342A (en) * | 2013-09-05 | 2013-12-18 | 鞍钢股份有限公司 | Device and method for increasing temperature of blast furnace hot air |
| CN103451342B (en) * | 2013-09-05 | 2015-07-08 | 鞍钢股份有限公司 | Device and method for increasing temperature of blast furnace hot air |
| CN109385497A (en) * | 2018-11-21 | 2019-02-26 | 苏州大学 | A method of improving blast furnace top gas temperature in gravitational precipitator |
| CN111944982A (en) * | 2020-09-15 | 2020-11-17 | 大连万通能源装备有限公司 | Novel energy-saving consumption-reducing continuous type cast tube annealing furnace system |
| CN111944982B (en) * | 2020-09-15 | 2022-03-29 | 大连万通能源装备有限公司 | Novel energy-saving consumption-reducing continuous type cast tube annealing furnace system |
| CN116516087A (en) * | 2023-05-11 | 2023-08-01 | 新疆八一钢铁股份有限公司 | Method for increasing temperature of top gas of hydrogen-rich carbon circulating oxygen blast furnace |
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