CN109385497A - A method of improving blast furnace top gas temperature in gravitational precipitator - Google Patents
A method of improving blast furnace top gas temperature in gravitational precipitator Download PDFInfo
- Publication number
- CN109385497A CN109385497A CN201811379629.6A CN201811379629A CN109385497A CN 109385497 A CN109385497 A CN 109385497A CN 201811379629 A CN201811379629 A CN 201811379629A CN 109385497 A CN109385497 A CN 109385497A
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- Prior art keywords
- gas
- temperature
- front tube
- oxygen
- tower front
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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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The method that the invention discloses a kind of to improve blast furnace top gas temperature in gravitational precipitator, pass through circumference setting gas nozzle and igniter on gravitational precipitator inner wall, high pressure oxygen is sprayed by gas nozzle and opens ignition device, the heat for generation of burning is for improving blast furnace gas temperature；The present invention utilizes top gas itself chemical energy, pass through carbon monoxide in burning blast furnace gas, the mode for generating amount of heat heats blast furnace gas, can effectively improve top gas and enter the temperature before bag filter, reduces subsequent bag filter cleaning frequency.
Description
Technical field
The invention belongs to blast furnace in metallurgical industry smelting operation technical field, it is related to a kind of control blast furnace top gas temperature
Method, and in particular to a method of blast furnace top gas temperature is improved in gravitational precipitator.
Background technique
Gravitational precipitator is widely used in the industrial production, is that a kind of gravity using particulate matter itself makes particulate matter from gas
The device of sedimentation separation in body.Granularity is larger in gas, and the particulate matter of heavier-weight can be smoothly detached by gravitational precipitator, but
Still there is granularity smaller, the particulate matter of lighter in weight can not be removed by gravitational precipitator, therefore latter by gravitational precipitator
As can also install bag filter additional.
In metallurgical production process, top gas ingredient is carbon monoxide, carbon dioxide, hydrogen, nitrogen etc., wherein
Containing a large amount of particulate matters and moisture, therefore, most of smelter selection gravitational precipitator and bag filter are for removing height
Dust in producer gas.Substantially 80-100 DEG C of the blast furnace gas temperature range at the coal gas down-comer of gravitational precipitator is passed through
Temperature is generally lower than 100 DEG C when gravitational precipitator reaches bag filter.Due to containing moisture in gas, when temperature is slightly lower,
Hydrogenesis is attached on cloth bag in conjunction with dust remaining in gas at droplet, forms " paste cloth bag " phenomenon, when " paste cloth bag " produces
When raw, the efficiency of dust collection of bag filter will decline, and cloth bag is blocked when serious, causes bag filter that can not work, Zhi Nengguan
Stop equipment replacement cloth bag, causes energy waste and environmental pollution.
Summary of the invention
In view of this, in order to solve, blast furnace roof temperature is too low to cause bag filter to need to be regularly maintained asking for cleaning
Topic, the method that the present invention provides a kind of to improve blast furnace top gas temperature in gravitational precipitator, to solve bag filter
Middle needs often clear up the problem of cloth bag.
A kind of method improving blast furnace top gas temperature in gravitational precipitator of the invention, the gravitational precipitator
Including coal gas down-comer, deduster, center ingress pipe and tower front tube, the top gas constituent occlusion body integral
The CO gas of 22% or more number, specifically, including the following steps:
(1) circumference setting gas nozzle and igniter on gravitational precipitator inner wall；
(2) gas measurement device is set at coal gas down-comer and tower front tube, for carbon monoxide in real-time measurement gas,
The percent by volume of hydrogen, oxygen；
(3) temperature measuring device, real-time measurement gas temperature are set at coal gas down-comer and tower front tube；
(4) fire-preventing check valve is set at gas nozzle, prevents fuel gas from flowing back；
(5) gas nozzle is connected into high pressure oxygen, high pressure oxygen flow and pressure size are adjustable, and high pressure oxygen temperature can
It adjusts；
(6) in gravitational precipitator operational process, high pressure oxygen is sprayed by gas nozzle and opens ignition device；
(7) during gas-fired at real-time measurement coal gas down-comer and tower front tube carbon monoxide, hydrogen and oxygen body
Product percentage, gas temperature at real-time measurement tower front tube, according to above-mentioned measured value, dynamic adjustment spray into the flow of oxygen, pressure,
Temperature, so that blast furnace gas is heated to 100-120 DEG C before entering tower front tube.
The blast furnace gas of the invention air temperature ranges at coal gas down-comer are 80-100 DEG C, final by the above method
Blast furnace gas can be heated to 100-120 DEG C before entering tower front tube.
In above-mentioned technical proposal, the top gas range of flow is 200000-300000m3/ h, pressure are
0.15-0.25MPa。
In above-mentioned technical proposal, the range of flow for spraying into oxygen is 2000-3000m3/ h, pressure limit 0.15-
0.30MPa, temperature range are 50-80 DEG C.
In above-mentioned technical proposal, decline 2-4% into carbon monoxide percentage by volume in the top gas of tower front tube.
In above-mentioned technical proposal, the oxygen percentage by volume in tower front tube is entered less than 1%.
Compared with prior art, technical solution beneficial effect provided by the invention is:
The present invention utilizes top gas itself chemical energy, by carbon monoxide in burning blast furnace gas, generates a large amount of
The mode of heat heats blast furnace gas, can effectively improve top gas and enter the temperature before bag filter, subtract
Few subsequent bag filter clears up frequency.
Detailed description of the invention
Fig. 1 is the arrangement and device operation schematic diagram that gas nozzle is arranged in gravitational precipitator provided by the invention.
Specific embodiment
Below in conjunction with the embodiment of the present invention and attached drawing, technical solution in the embodiment of the present invention carries out detailed retouch
It states.
As shown in Fig. 1, the gravitational precipitator that the present invention uses includes coal gas down-comer 1, deduster 4, center ingress pipe 3
With tower front tube 2, circumference setting gas nozzle 51 and igniter 52 on gravitational precipitator inner wall；Before coal gas down-comer and tower
Gas measurement device 11, gas measurement device 21 are respectively set at pipe, for carbon monoxide, hydrogen and oxygen in real-time measurement gas
The percent by volume of gas；Temperature measuring device 12, temperature measuring device 22 are respectively set at coal gas down-comer and tower front tube, it is real
When measure gas temperature；Gas nozzle connects high pressure oxygen, and high pressure oxygen flow and pressure size are adjustable, and high pressure oxygen temperature can
It adjusts, is controlled by Oxygen control equipment 53；Fire-preventing check valve is set at gas nozzle, prevents fuel gas from flowing back.
Embodiment 1
Gravitational precipitator is run, the top gas flow of entrance is 220000m3/ h, pressure 0.16MPa, by
The gas measurement device 11 of coal gas down-comer 1 measures carbon monoxide in stock gas, the percent by volume of hydrogen is respectively 26%,
2%, and be 90 DEG C by the furnace top gas temperature that temperature measuring device 12 measures entrance.Gas nozzle 51 is opened, spraying into pressure is
The high pressure oxygen of 0.18MPa simultaneously opens the igniting of igniter 52, and the flow of high pressure oxygen is 2500m3/ h, temperature are 80 DEG C.It opens
After opening device 12 hours, by the gas measurement device 21 of tower front tube 2, the volume of carbon monoxide in coal gas, hydrogen, oxygen is measured
Percentage is respectively 23%, < 1%, < 1%, and is 112 DEG C by the gas temperature that temperature measuring device 22 measures tower front tube,
Dynamic adjustment sprays into flow, the pressure and temperature of oxygen, so that blast furnace gas is heated to 100-120 DEG C before entering tower front tube.
Embodiment 2
Gravitational precipitator is run, the top gas flow of entrance is 250000m3/ h, pressure 0.20MPa, by
The gas measurement device 11 of coal gas down-comer 1 measures carbon monoxide in stock gas, the percent by volume of hydrogen is respectively 25%,
2%, and be 95 DEG C by the furnace top gas temperature that temperature measuring device 12 measures entrance.Gas nozzle 51 is opened, spraying into pressure is
The high pressure oxygen of 0.22MPa simultaneously opens the igniting of igniter 52, and the flow of high pressure oxygen is 2000m3/ h, temperature are 60 DEG C.It opens
After opening device 12 hours, by the gas measurement device 21 of tower front tube 2, the volume of carbon monoxide in coal gas, hydrogen, oxygen is measured
Percentage is respectively 23%, < 1%, < 1%, and is 110 DEG C by the gas temperature that temperature measuring device 22 measures tower front tube,
Dynamic adjustment sprays into flow, the pressure and temperature of oxygen, so that blast furnace gas is heated to 100-120 DEG C before entering tower front tube.
Embodiment 3
Gravitational precipitator is run, the top gas flow of entrance is 250000m3/ h, pressure 0.18MPa, by
The gas measurement device 11 of coal gas down-comer 1 measures carbon monoxide in stock gas, the percent by volume of hydrogen is respectively 28%,
3%, and be 86 DEG C by the furnace top gas temperature that temperature measuring device 12 measures entrance.Gas nozzle 51 is opened, spraying into pressure is
The high pressure oxygen of 0.22MPa simultaneously opens the igniting of igniter 52, and the flow of high pressure oxygen is 2600m3/ h, temperature are 80 DEG C.It opens
After opening device 12 hours, by the gas measurement device 21 of tower front tube 2, the volume of carbon monoxide in coal gas, hydrogen, oxygen is measured
Percentage is respectively 24%, < 1%, < 1%, and is 105 DEG C by the gas temperature that temperature measuring device 22 measures tower front tube,
Dynamic adjustment sprays into flow, the pressure and temperature of oxygen, so that blast furnace gas is heated to 100-120 DEG C before entering tower front tube.
Comparative example 1
Gravitational precipitator is run, the top gas flow of entrance is 2000m3/ h, pressure 0.20MPa, by coal
The gas measurement device 11 of gas down-comer 1 measures carbon monoxide in stock gas, the percent by volume of hydrogen is respectively 25%,
3%, and be 90 DEG C by the furnace top gas temperature that temperature measuring device 12 measures entrance.Close gas nozzle 51 and igniter
After 52,12 hours, measuring the gas temperature at tower front tube by the temperature measuring device 22 of tower front tube 2 is 90 DEG C.
Claims (5)
1. a kind of method for improving blast furnace top gas temperature in gravitational precipitator, which is characterized in that the gravitational dust collection
Device includes coal gas down-comer, deduster, center ingress pipe and tower front tube, and the top gas includes volume fraction 22%
Above carbon monoxide, includes the following steps:
S1, circumference setting gas nozzle and igniter on gravitational precipitator inner wall；
S2, the gas measurement device that real-time measurement gas volume percentage is set at coal gas down-comer and tower front tube；
S3, the temperature measuring device that real-time measurement gas temperature is set at coal gas down-comer and tower front tube；
S4, the fire-preventing check valve that setting prevents fuel gas from flowing back at gas nozzle；
S5, gas nozzle is connected into flow, pressure, the adjustable high pressure oxygen of temperature；
S6, in gravitational precipitator operational process, sprayed by gas nozzle and high pressure oxygen and open ignition device；
Carbon monoxide at real-time measurement coal gas down-comer and tower front tube in S7, top gas combustion process, hydrogen, oxygen
Percent by volume, gas temperature at real-time measurement tower front tube, according to above-mentioned measured value, dynamic adjustment sprays into the flow of oxygen, pressure
Power, temperature, so that top gas is heated to 100-120 DEG C before entering tower front tube.
2. the method according to claim 1, wherein the top gas flow is 200000-
300000m3/ h, pressure 0.15-0.25MPa.
3. the method according to claim 1, wherein the flow for spraying into oxygen is 2000-3000m3/ h, pressure
Power is 0.15-0.30MPa, temperature is 50-80 DEG C.
4. the method according to claim 1, wherein into carbon monoxide body in the top gas of tower front tube
Product percentage declines 2-4%.
5. according to the method described in claim 1, it is characterized by: entering the carrier of oxygen in the top gas of tower front tube
Product percentage is less than 1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811379629.6A CN109385497B (en) | 2018-11-21 | 2018-11-21 | Method for increasing temperature of blast furnace top gas in gravity dust collector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811379629.6A CN109385497B (en) | 2018-11-21 | 2018-11-21 | Method for increasing temperature of blast furnace top gas in gravity dust collector |
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| CN109385497A true CN109385497A (en) | 2019-02-26 |
| CN109385497B CN109385497B (en) | 2020-10-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116516086A (en) * | 2023-05-11 | 2023-08-01 | 新疆八一钢铁股份有限公司 | Oxygen blast furnace top temperature control method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055390A (en) * | 1990-05-30 | 1991-10-16 | 唐山工程技术学院 | Raw gas temperature control novel process and device before the bf bag filter |
| CN2416374Y (en) * | 2000-03-09 | 2001-01-24 | 山东泰山钢铁总公司炼铁二厂 | Semi purified gas self-controlling temperature gravity dust collector |
| CN1597995A (en) * | 2004-08-16 | 2005-03-23 | 山东省冶金设计院 | Method and apparatus for raising temp. of gas in furnace |
| CN101245398A (en) * | 2007-02-14 | 2008-08-20 | 山东省冶金设计院 | Device for quickly elevating temperature, dust removing system and method for blast furnace gas |
| CN101684506A (en) * | 2008-09-27 | 2010-03-31 | 上海梅山钢铁股份有限公司 | Dust removing system and processing method of blast furnace raw gas |
| CN101818220A (en) * | 2009-12-16 | 2010-09-01 | 江苏百斯特环境工程有限公司 | Blast-furnace gas heating-up system |
| CN103866067A (en) * | 2014-03-04 | 2014-06-18 | 中冶南方工程技术有限公司 | Blast furnace coal gas gravitational dust collector with cooling effect |
| CN103933786A (en) * | 2014-04-04 | 2014-07-23 | 莱芜钢铁集团有限公司 | Gravity dust collector |
-
2018
- 2018-11-21 CN CN201811379629.6A patent/CN109385497B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055390A (en) * | 1990-05-30 | 1991-10-16 | 唐山工程技术学院 | Raw gas temperature control novel process and device before the bf bag filter |
| CN2416374Y (en) * | 2000-03-09 | 2001-01-24 | 山东泰山钢铁总公司炼铁二厂 | Semi purified gas self-controlling temperature gravity dust collector |
| CN1597995A (en) * | 2004-08-16 | 2005-03-23 | 山东省冶金设计院 | Method and apparatus for raising temp. of gas in furnace |
| CN101245398A (en) * | 2007-02-14 | 2008-08-20 | 山东省冶金设计院 | Device for quickly elevating temperature, dust removing system and method for blast furnace gas |
| CN101684506A (en) * | 2008-09-27 | 2010-03-31 | 上海梅山钢铁股份有限公司 | Dust removing system and processing method of blast furnace raw gas |
| CN101818220A (en) * | 2009-12-16 | 2010-09-01 | 江苏百斯特环境工程有限公司 | Blast-furnace gas heating-up system |
| CN103866067A (en) * | 2014-03-04 | 2014-06-18 | 中冶南方工程技术有限公司 | Blast furnace coal gas gravitational dust collector with cooling effect |
| CN103933786A (en) * | 2014-04-04 | 2014-07-23 | 莱芜钢铁集团有限公司 | Gravity dust collector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116516086A (en) * | 2023-05-11 | 2023-08-01 | 新疆八一钢铁股份有限公司 | Oxygen blast furnace top temperature control method |
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| CN109385497B (en) | 2020-10-30 |
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