CN1038147C - Gas supply and control device for spraying oxygen in blast furnace - Google Patents
Gas supply and control device for spraying oxygen in blast furnace Download PDFInfo
- Publication number
- CN1038147C CN1038147C CN 95102433 CN95102433A CN1038147C CN 1038147 C CN1038147 C CN 1038147C CN 95102433 CN95102433 CN 95102433 CN 95102433 A CN95102433 A CN 95102433A CN 1038147 C CN1038147 C CN 1038147C
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- oxygen
- valve
- control
- nitrogen
- blast
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Abstract
The present invention relates to an oxygen supplying and controlling device for blowing oxygen to oxygen coal of a blast furnace, which is especially suitable for a blast furnace which adopts a blast furnace oxygen coal gun to blow coal powder. The controlling device is characterized in that the controlling device integrates important devices, such as an oxygen pressure regulating and controlling station (2), a nitrogen pressure regulating and controlling station (8), a flow and pressure controlling valve group (5), etc., and a meter into a managing station (20) to be isolated from a blast furnace production field. The whole device has the advantages of high sensitivity, reliable operation, convenient maintenance, and service life extension of the meter and the devices, and consequently, the safe and smooth operation of the oxygen coal blowing technology is ensured.
Description
The present invention relates to a kind of blast furnace table gas supply and control device, be specially adapted to adopt the blast furnace of oxygen coal gun oxygen-enriched injection coal dust to use.
Adopt at present the blast furnace of oxygen-coal puffing art, the required oxygen of jetting is to deliver to the oxygen supply endless tube that depends on bustle pipe by the oxygen main, again by the oxygen supply arm respectively to the oxygen coal gun oxygen supply that inserts in each air port.By-pass valve control on oxygen supply endless tube and each arm, monitoring instrument, various lead are divided equally to scatter and are put each top, air port of dried blast furnace, are exposed in temperature height on the table, dust is many, noise the is big severe environment.Not only seriously reduce the work-ing life of valve, instrument, improved operation and maintenance cost, and reduced the sensitivity and the reliability of valve, instrument, lost the safeguard protection effect of oxygen system.Particularly because the blast furnace table is in the naked light area, blast furnace sprays into coal dust and amount of oxygen respectively up to per hour 1000～2500 kilograms and 100～300 cubic metres from the air port, every blast furnace has 12～40 oxygen coal guns, even oxygen coal gun breakage, cause oxygen leakage, also can bring beyond measure infringement to field staff and production unit.
The object of the invention is to provide a kind of maintenance management of being convenient to, and improves valve, instrumentation environment, prolongs service life of equipment, the gas supply and the control device of protection blast furnace oxygen-coal puffing art safety.
Gas supply of the present invention and control device have comprised oxygen Regulation Control station (2), nitrogen Regulation Control station (8), 5～60 contain flow, the oxygen manifold of safety-valve group (6) before pressure control valve group (5) and the rifle, 5～60 purging nitrogen arms that contain quick open T-valve (11), the number of nitrogen arm is corresponding with the oxygen manifold number, control is with nitrogen supply (NS) and control device (18), blast-furnace tuyere stops up monitoring pressure difference transmitter (16), oxygen Regulation Control station (2) links by house steward (3) and pipeline (4) with each nitrogen arm, control with nitrogen supply (NS) and control device (18) by pipeline (19) respectively with oxygen Regulation Control station (2), flow and pressure control valve group (5) and open fast T-valve (11) link, blast-furnace tuyere stops up monitoring and uses pressure difference transmitter (16) by signal line and flow, pressure control valve group (5) links, the invention is characterized in: gas supply and control device are with oxygen Regulation Control station (2), nitrogen Regulation Control station (8), oxygen house steward (3), nitrogen header pipe (9), flow, pressure control valve group (5), fast open T-valve (11), control is with nitrogen supply (NS) and control device (18) and pipeline (19), focus on an area and be in 10～80 square metres the centralized management station (20), management station (20) isolates with the blast furnace production scene.
The invention has the advantages that it is with instrument important in gas supply and the control device and the centralized management of important valve, whole device sensitivity height, reliable operation is convenient to maintaining, prolonged the work-ing life of instrument and equipment, thus guaranteed oxygen-coal puffing art safe, carry out smoothly.
Below in conjunction with accompanying drawing the present invention is described in further detail.
Fig. 1 is apparatus of the present invention pie graphs.
Fig. 2 is typical oxygen, a nitrogen branch road structure iron in apparatus of the present invention.
Oxygen enters supply main (3) by oxygen main (1) through oxygen Regulation Control station (2), and safety-valve group (6) is delivered to blast-furnace tuyere and oxygen coal gun links before pipeline (4) is by flow, pressure control valve group (5) and rifle again.Look the furnace volume size, every blast furnace oxygen manifold has 5～60.Nitrogen enters nitrogen supply (NS) house steward (9) by nitrogen main (7) through nitrogen Regulation Control station (8), again between pipeline (10) is by repid cut-off valve (23) on fast open T-valve (11), pipeline (12) the aerating oxygen arm and flow control valve (21), unnecessary nitrogen is drained into outside the centralized management station by bleeder (13), and the number of nitrogen arm is corresponding with the oxygen manifold number.Control is provided by the nitrogen stabilization pressure jar (17) that is connected in nitrogen supply (NS) house steward (9) with nitrogen, enters after control nitrogen supply (NS) and control device (18) pressure regulation and respectively controls arm (19).
Gas supply of the present invention and control device utilize physical parameters such as flow, pressure difference as control signal, in the oxygen coal injection process, when oxygen coal gun rifle head scaling loss or obstruction, flow and pressure difference in the oxygen manifold all will change, when its changing value surpasses set(ting)value, flow control valve (21), pressure regulator valve (22) provide control signal, make repid cut-off valve (23) action, cut off oxygen, simultaneously nitrogen control T-valve (24) is opened, and makes on the rapid aerating oxygen arm of nitrogen between the repid cut-off valve (23) and flow control valve (21).Repid cut-off valve on the oxygen manifold (23) and blast-furnace hot-air surrounding pipes (14); bend pipe (15) stops up monitoring by blast-furnace tuyere and links with pressure difference transmitter (16); when blast-furnace tuyere stops up for some reason; pressure difference between bustle pipe (14) and the bend pipe (15) reduces; during less than threshold value; blast-furnace tuyere stops up monitoring and provides control signal with pressure difference transmitter (16); make repid cut-off valve (23) action; cut off oxygen; and open rapidly and open T-valve (24) fast; make on the nitrogen aerating oxygen arm between the repid cut-off valve (23) and flow control valve (21), thereby play the safeguard protection effect.
Claims (3)
1. the gas supply and the control device of a spraying oxygen in blast furnace, comprise oxygen Regulation Control station (2), nitrogen Regulation Control station (8), 5～60 contain flow, the oxygen manifold of safety-valve group (6) before pressure control valve group (5) and the rifle, 5～60 purging nitrogen arms that contain quick open T-valve (11), the number of nitrogen arm is corresponding with the oxygen manifold number, control is with nitrogen supply (NS) and control device (18), blast-furnace tuyere stops up monitoring pressure difference transmitter (16), oxygen Regulation Control station (2) links by house steward (3) and pipeline (4) with each nitrogen arm, control with nitrogen supply (NS) and control device (18) by pipeline (19) respectively with oxygen Regulation Control station (2), flow, pressure control valve group (5) and open fast T-valve (11) link, blast-furnace tuyere stops up monitoring and uses pressure difference transmitter (16) by signal line and flow, pressure control valve group (5) links, it is characterized in that: gas supply and control device are with oxygen Regulation Control station (2), nitrogen Regulation Control station (8), oxygen house steward (3), nitrogen header pipe (9), flow, pressure control valve group (5), fast open T-valve (11), control is with nitrogen supply (NS) and control device (18) and pipeline (19), focus on an area and be in 10～30 square metres the centralized management chamber (20), caretaker room (20) is isolated with the blast furnace production scene.
2. the gas supply and the control device of spraying oxygen in blast furnace as claimed in claim 1, it is characterized in that: gas control equipment is to utilize flow, physical parameters such as pressure difference are as control signal, in the oxygen coal injection process, when oxygen coal gun rifle head scaling loss or obstruction, flow and pressure difference in the oxygen manifold all will change, when its changing value surpasses set(ting)value, flow control valve (21), pressure regulator valve (22) provides control signal, make repid cut-off valve (23) action, cut off oxygen, nitrogen control T-valve (24) is opened simultaneously, makes nitrogen rapidly by between repid cut-off valve on the oxygen manifold (23) and the flow control valve.
3. the gas supply and the control device of spraying oxygen in blast furnace as claimed in claim 1, it is characterized in that: repid cut-off valve on the gas control equipment oxygen manifold (23) and blast-furnace hot-air surrounding pipes (14), bend pipe (15) stops up monitoring by blast-furnace tuyere and links with pressure difference transmitter (16), when blast-furnace tuyere stops up for some reason, pressure difference between bustle pipe (14) and the bend pipe (15) reduces, during less than threshold value, blast-furnace tuyere stops up monitoring and provides control signal with pressure difference transmitter (16), make repid cut-off valve (23) action, cut off oxygen, and open rapidly fast open T-valve (24), make on the nitrogen aerating oxygen arm between the repid cut-off valve (23) and flow control valve (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95102433 CN1038147C (en) | 1995-03-20 | 1995-03-20 | Gas supply and control device for spraying oxygen in blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95102433 CN1038147C (en) | 1995-03-20 | 1995-03-20 | Gas supply and control device for spraying oxygen in blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1110718A CN1110718A (en) | 1995-10-25 |
| CN1038147C true CN1038147C (en) | 1998-04-22 |
Family
ID=5074334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95102433 Expired - Fee Related CN1038147C (en) | 1995-03-20 | 1995-03-20 | Gas supply and control device for spraying oxygen in blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1038147C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104854249A (en) * | 2012-12-11 | 2015-08-19 | 杰富意钢铁株式会社 | Equipment for injecting oxygen from blast furnace tuyere and blast furnace operation method |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451132C (en) * | 2004-07-23 | 2009-01-14 | 东北大学 | Local on-line repairing methd of blast furnace crucible and blast furnace bottom |
| CN102409122A (en) * | 2011-11-23 | 2012-04-11 | 福建三钢闽光股份有限公司 | Blast furnace oxygen adding coal injection method and apparatus thereof |
| CN103014205A (en) * | 2012-12-31 | 2013-04-03 | 中冶京诚工程技术有限公司 | Oxygen supply method for oxygen-enriched coal injection of blast furnace |
| CN103953918B (en) * | 2014-04-28 | 2017-01-18 | 首钢京唐钢铁联合有限责任公司 | Oxygen-enriched combustion system for coal gas-pulverized coal mixed combustion power station boiler |
| WO2018234481A1 (en) * | 2017-06-22 | 2018-12-27 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process fluid injection into shaft furnace with injector status test |
-
1995
- 1995-03-20 CN CN 95102433 patent/CN1038147C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104854249A (en) * | 2012-12-11 | 2015-08-19 | 杰富意钢铁株式会社 | Equipment for injecting oxygen from blast furnace tuyere and blast furnace operation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1110718A (en) | 1995-10-25 |
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