CN103571985B - Without the method for safe operation of gas holder single seat blast fumance gaspipe network - Google Patents
Without the method for safe operation of gas holder single seat blast fumance gaspipe network Download PDFInfo
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- CN103571985B CN103571985B CN201310517285.1A CN201310517285A CN103571985B CN 103571985 B CN103571985 B CN 103571985B CN 201310517285 A CN201310517285 A CN 201310517285A CN 103571985 B CN103571985 B CN 103571985B
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Abstract
The invention discloses a kind of method for safe operation without gas holder single seat blast fumance gaspipe network, described blast furnace is iron-smelting blast furnace; Described gaspipe network is also connected with coal gas applying unit, and described gaspipe network is connected with low-pressure nitrogen pipe network by nitrogen pipeline.Present invention also offers the method for safe operation of described gaspipe network.Adopt technique scheme, ensure that each coal gas user is in pipe network decompression situation, can close burner valve if having time, ensure pipe network malleation, prevent back draft accident, ensure the safety and stability of pipe network operation; After furnace compound wind, due to malleation all the time in pipeline, enter without air, in the short period of time, blast furnace gas user explosion-proof test is qualified, can ensure that user resumes production rapidly.
Description
Technical field
The invention belongs to the technical field of metallurgical industry production unit, relate to the technology of blast fumance equipment, more particularly, the present invention relates to a kind of method for safe operation without gas holder single seat blast fumance gaspipe network.
Background technology
Because blast furnace is at the operation initial stage, produce still unstable, what often there will be planned and unplanned property promptly cuts gas damping down.Plan damping down cuts coal gas and the unexpected chaser of blower fan, causes blast furnace to cut suddenly coal gas and happens occasionally;
Again due to single seat blast fumance, once gas damping down cut by blast furnace, ductwork pressure sharply declines, and may cause pipe network negative pressure very greatly, and each user has little time to close burner valve, causes back draft and other secondary serious accident.
In order to solve the problem, present most of iron and steel enterprise, in single seat blast fumance situation, adopts gas holder to ensure public security to pipe network.Because some enterprise's gas holder can not synchronously put into operation when blast fumance, when without gas holder blast fumance, the hidden danger that gaspipe network security presence is very large.
Summary of the invention
The invention provides a kind of without gas holder single seat blast fumance gaspipe network, its objective is the safety ensured without the gaspipe network of gas holder.
To achieve these goals, the technical scheme that the present invention takes is:
Of the present invention without gas holder single seat blast fumance gaspipe network, described blast furnace is iron-smelting blast furnace; Described gaspipe network is also connected with coal gas applying unit, and described gaspipe network is connected with low-pressure nitrogen pipe network by nitrogen pipeline.
Described nitrogen pipeline is provided with pneumatic ball valve group.
Described pneumatic ball valve group comprises pneumatic ball valve and two gate valves; Two described gate valves are located on the nitrogen pipeline at pneumatic ball valve two ends respectively.
The electromagnetic mechanism of described pneumatic ball valve is connected with gaspipe network Controlling System by signal line.
Described coal gas applying unit comprises coker, generating set, naked light diffuse equipment, coal powder injection equipment, blast funnace hot blast stove, steel rolling equipment.
In order to realize the goal of the invention identical with technique scheme, present invention also offers the above-described method for safe operation without gas holder single seat blast fumance gaspipe network, its technical scheme is:
Under the state that pneumatic ball valve is closed, the pressure drop of described gaspipe network, and drop to when being equal to or less than low-pressure settings, gaspipe network Controlling System sends signal to the electromagnetic mechanism of pneumatic ball valve, controls electromagnetic mechanism action, the power gas source of conducting pneumatic ball valve, pneumatic ball valve is opened, make nitrogen pipeline conducting, low-pressure nitrogen pipe network supplements nitrogen to gaspipe network, carries out pressurize to gaspipe network;
Under the state that pneumatic ball valve is opened, the pressure increase of described gaspipe network, and when being raised to higher than high pressure set point, gaspipe network Controlling System sends signal to the electromagnetic mechanism of pneumatic ball valve, controls electromagnetic mechanism action, closes the power gas source of pneumatic ball valve, pneumatic ball valve is closed, nitrogen pipeline is ended, and low-pressure nitrogen pipe network stops supplementing nitrogen to gaspipe network, ensures gaspipe network not superpressure.
The pressure of described low-pressure nitrogen pipe network is 0.8MPa.
The low-pressure settings of described gaspipe network is 1000Pa; High pressure set point is 3000Pa.
The present invention adopts technique scheme, ensures that each coal gas user is in pipe network decompression situation, can close burner valve if having time, ensures pipe network malleation, prevents back draft accident, ensures the safety and stability of pipe network operation; After furnace compound wind, due to malleation all the time in pipeline, enter without air, in the short period of time, blast furnace gas user explosion-proof test is qualified, can ensure that user resumes production rapidly.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is described in further detail, have more complete, accurate and deep understanding to help those skilled in the art to inventive concept of the present invention, technical scheme.
Structure of the present invention as shown in the figure, for a kind of without gas holder single seat blast fumance gaspipe network, described blast furnace is iron-smelting blast furnace; Described gaspipe network is also connected with coal gas applying unit.
In order to solve prior art Problems existing and overcome its defect, realize ensureing the goal of the invention without the safety of the gaspipe network of gas holder, the technical scheme that the present invention takes is:
As shown in Figure 1, of the present invention without gas holder single seat blast fumance gaspipe network, be connected with low-pressure nitrogen pipe network by nitrogen pipeline.
After blast furnace is gone into operation, plan damping down is cut coal gas and the unexpected chaser of blower fan and is caused blast furnace to cut suddenly coal gas to happen occasionally, and technique scheme of the present invention, ensures pipe network operation safety and stability.After furnace compound wind, due to malleation all the time in pipeline, enter without air, in the short period of time, blast furnace gas user explosion-proof test is qualified, can ensure that rapidly user resumes production.
The invention solves and cut suddenly gas damping down at blast furnace, ductwork pressure sharply declines, cause pipe network negative pressure, under each user has little time to close burner valve situation, there is not back draft in blast furnace gas pipeline network, ensures blast furnace gas system safety operation.
Low-pressure nitrogen pipe network is undertaken being connected (concrete mode of connection as shown in the figure) by the valving that gate valve, pneumatic ball valve form with blast furnace gas pipeline network, and low-pressure nitrogen pipeline is from company's low-pressure nitrogen pipe network, and nitrogen pressure remains on 0.8MPa.
Described nitrogen pipeline is provided with pneumatic ball valve group.
Described pneumatic ball valve group comprises pneumatic ball valve and two gate valves; Two described gate valves are located on the nitrogen pipeline at pneumatic ball valve two ends respectively.
Principal facility of the present invention is the nitrogen valving shown in Fig. 1, and gate valve A is connected with blast furnace gas pipeline, Main Function be with gate valve B with the use of; Gate valve B is connected with low-pressure nitrogen pipe network.When pneumatic ball valve in use breaks down, closing gate valve A, gate valve B, overhaul pneumatic dismounting ball valve.
Except said effect above, can also play and control the effect that nitrogen enters blast furnace gas pipeline network flow, generally in debugging, this valve opening is transferred to appropriate location.
Control principle: utilize blast furnace gas main pipe pressure and nitrogen operated pneumatic valve chain.
When gas damping down cut suddenly by blast furnace, when blast furnace gas pipeline network pressure is lower than 1000Pa, pneumatic ball valve is opened automatically, now low-pressure nitrogen enters blast furnace gas pipeline, carries out pressurize to pipe network inflated with nitrogen, guarantees that pipeline is in barotropic state, ensure that each coal gas user is in pipe network decompression situation, each user can close burner valve if having time, ensures pipe network malleation, prevents back draft accident.
Simultaneously in order to avoid pipeline superpressure causes the accident, when blast furnace gas pipeline network pressure is higher than pressure set points, during more than 3000Pa, pneumatic ball valve is closed automatically, ensures that pipe network super high pressure accident does not occur.
The electromagnetic mechanism of described pneumatic ball valve is connected with gaspipe network Controlling System by signal line.
Pneumatic ball valve is the core component in this facility, the propulsion source of this valve switch is low-pressure nitrogen, control signal is converted to electrical signal by instrument control signal, when ductwork pressure is lower than set(ting)value, instrument control gives a signal, and the magnetic valve controlling ball valve switch is opened, conducting power gas source, pneumatic ball valve is opened, and carries out pressurize to pipe network inflated with nitrogen to pipe network; When ductwork pressure is higher than set(ting)value, instrument control gives the closed electromagnetic valve controlling ball valve switch during a signal, and ball valve is closed, and stops gas line inflated with nitrogen, ensures pipe network not superpressure.
Described coal gas applying unit comprises coker, generating set, naked light diffuse equipment, coal powder injection equipment, blast funnace hot blast stove, steel rolling equipment.Be denoted as coking in the drawings, generating, naked light diffuse, coal powder injection, blast funnace hot blast stove, steel rolling.No. 1 stove of smelting iron is aerogenesis unit.Low-pressure nitrogen is nitrogen pressurize source of the gas.
In pipeline, many places gate valve is also set, to control uninterrupted or opening and closing pipeline.
In order to realize the goal of the invention identical with technique scheme, present invention also offers the above-described method for safe operation without gas holder single seat blast fumance gaspipe network, its technical scheme is:
Under the state that pneumatic ball valve is closed, the pressure drop of described gaspipe network, and drop to when being equal to or less than low-pressure settings, gaspipe network Controlling System sends signal to the electromagnetic mechanism of pneumatic ball valve, controls electromagnetic mechanism action, the power gas source of conducting pneumatic ball valve, pneumatic ball valve is opened, make nitrogen pipeline conducting, low-pressure nitrogen pipe network supplements nitrogen to gaspipe network, carries out pressurize to gaspipe network;
Under the state that pneumatic ball valve is opened, the pressure increase of described gaspipe network, and when being raised to higher than high pressure set point, gaspipe network Controlling System sends signal to the electromagnetic mechanism of pneumatic ball valve, controls electromagnetic mechanism action, closes the power gas source of pneumatic ball valve, pneumatic ball valve is closed, nitrogen pipeline is ended, and low-pressure nitrogen pipe network stops supplementing nitrogen to gaspipe network, ensures gaspipe network not superpressure.
The pressure of described low-pressure nitrogen pipe network is 0.8MPa.
The low-pressure settings of described gaspipe network is 1000Pa; High pressure set point is 3000Pa.
Low-pressure nitrogen pipe network is undertaken being connected (concrete mode of connection as shown in Figure 1) by the valving that gate valve, pneumatic ball valve form with blast furnace gas pipeline network, low-pressure nitrogen pipeline is from enterprise's low-pressure nitrogen pipe network, nitrogen pressure remains on 0.8MPa, because this pneumatic ball valve is standard-sized sheet and full cut-off, nitrogen flow is regulated by the gate valve before ball valve; For the ease of operation, connect place and be located at blast furnace gas holder platform place, by gas-holder operation, personnel monitor valve state, current check maintaining.
Utilize blast furnace gas main pipe pressure and nitrogen operated pneumatic valve chain.When blast furnace gas pipeline network pressure is lower than 1000Pa, Automatic Control Theory nitrogen ball valve is used automatically to open, now low-pressure nitrogen enters blast furnace gas pipeline, guarantee that pipeline is in barotropic state, ensure that each coal gas user is in pipe network decompression situation, each user can close burner valve if having time, ensures pipe network malleation, prevents back draft accident.Simultaneously in order to avoid pipeline superpressure causes the accident, when blast furnace gas pipeline network pressure is closed automatically more than nitrogen ball valve during 3000Pa, ensure that pipe network super high pressure accident does not occur.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.
Claims (7)
1., without the method for safe operation of gas holder single seat blast fumance gaspipe network, described blast furnace is iron-smelting blast furnace; Described gaspipe network is also connected with coal gas applying unit, and described gaspipe network is connected with low-pressure nitrogen pipe network by nitrogen pipeline;
It is characterized in that described method for safe operation is:
Under the state that pneumatic ball valve is closed, the pressure drop of described gaspipe network, and drop to when being equal to or less than low-pressure settings, gaspipe network Controlling System sends signal to the electromagnetic mechanism of pneumatic ball valve, controls electromagnetic mechanism action, the power gas source of conducting pneumatic ball valve, pneumatic ball valve is opened, make nitrogen pipeline conducting, low-pressure nitrogen pipe network supplements nitrogen to gaspipe network, carries out pressurize to gaspipe network;
Under the state that pneumatic ball valve is opened, the pressure increase of described gaspipe network, and when being raised to higher than high pressure set point, gaspipe network Controlling System sends signal to the electromagnetic mechanism of pneumatic ball valve, controls electromagnetic mechanism action, closes the power gas source of pneumatic ball valve, pneumatic ball valve is closed, nitrogen pipeline is ended, and low-pressure nitrogen pipe network stops supplementing nitrogen to gaspipe network, ensures gaspipe network not superpressure;
The pressure of described low-pressure nitrogen pipe network is 0.8MPa;
The low-pressure settings of described gaspipe network is 1000Pa; High pressure set point is 3000Pa.
2. according to method for safe operation according to claim 1, it is characterized in that: described nitrogen pipeline is provided with pneumatic ball valve group.
3. according to method for safe operation according to claim 2, it is characterized in that: described pneumatic ball valve group comprises pneumatic ball valve and two gate valves; Two described gate valves are located on the nitrogen pipeline at pneumatic ball valve two ends respectively.
4. according to method for safe operation according to claim 3, it is characterized in that: the electromagnetic mechanism of described pneumatic ball valve is connected with gaspipe network Controlling System by signal line.
5. according to method for safe operation according to claim 1, it is characterized in that: described coal gas applying unit comprises coker, generating set.
6. according to method for safe operation according to claim 1, it is characterized in that: described coal gas applying unit comprises naked light and diffuses equipment, coal powder injection equipment.
7. according to method for safe operation according to claim 1, it is characterized in that: described coal gas applying unit comprises blast funnace hot blast stove, steel rolling equipment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310517285.1A CN103571985B (en) | 2013-10-26 | 2013-10-26 | Without the method for safe operation of gas holder single seat blast fumance gaspipe network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310517285.1A CN103571985B (en) | 2013-10-26 | 2013-10-26 | Without the method for safe operation of gas holder single seat blast fumance gaspipe network |
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| CN103571985A CN103571985A (en) | 2014-02-12 |
| CN103571985B true CN103571985B (en) | 2015-09-16 |
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| CN106481982A (en) * | 2016-09-29 | 2017-03-08 | 马鞍山钢铁股份有限公司 | A kind of automatic nitrogen safety purge gaspipe line device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07253280A (en) * | 1994-03-15 | 1995-10-03 | Kawasaki Heavy Ind Ltd | Exhaust gas-switching apparatus |
| CN102618302A (en) * | 2012-03-18 | 2012-08-01 | 莱芜市泰山焦化有限公司 | Device for preventing coke oven gas main pipe from forming negative pressure and using method thereof |
| CN202912975U (en) * | 2012-11-12 | 2013-05-01 | 鞍钢集团工程技术有限公司 | Process unit for jetting coke oven gas to blast furnace |
| CN103205515A (en) * | 2013-03-26 | 2013-07-17 | 鞍钢股份有限公司 | Blast furnace coke oven gas injection system and method thereof |
-
2013
- 2013-10-26 CN CN201310517285.1A patent/CN103571985B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07253280A (en) * | 1994-03-15 | 1995-10-03 | Kawasaki Heavy Ind Ltd | Exhaust gas-switching apparatus |
| CN102618302A (en) * | 2012-03-18 | 2012-08-01 | 莱芜市泰山焦化有限公司 | Device for preventing coke oven gas main pipe from forming negative pressure and using method thereof |
| CN202912975U (en) * | 2012-11-12 | 2013-05-01 | 鞍钢集团工程技术有限公司 | Process unit for jetting coke oven gas to blast furnace |
| CN103205515A (en) * | 2013-03-26 | 2013-07-17 | 鞍钢股份有限公司 | Blast furnace coke oven gas injection system and method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 无气柜转炉煤气回收利用;邱欣盛;《冶金动力》;20030228(第1期);第16页第2.0节、第17页第3.2节及图1 * |
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