CN203602640U - Non gas holder single-base blast furnace production gaspipe network - Google Patents
Non gas holder single-base blast furnace production gaspipe network Download PDFInfo
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- CN203602640U CN203602640U CN201320669261.3U CN201320669261U CN203602640U CN 203602640 U CN203602640 U CN 203602640U CN 201320669261 U CN201320669261 U CN 201320669261U CN 203602640 U CN203602640 U CN 203602640U
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- blast furnace
- gaspipe network
- ball valve
- gaspipe
- network
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Abstract
The utility model discloses a non gas holder single-base blast furnace production gaspipe network, the blast furnace is an iron-making blast furnace, the gaspipe network is connected with gas use unit, and the gaspipe network is connected with a low-pressure nitrogen pipe network through a nitrogen pipeline. By adopting the above technical scheme, each gas user has time to turn off a nozzle valve in the premise of guaranteeing reduced pressure condition of the pipe network, the positive pressure of the pipe network is guaranteed, the back draft explosion accident is prevented, and the safe and stable operation of the pipe network is guaranteed; after the blast furnace is re-blown, the blast furnace gas user explosion-proof test is qualified in short time since the internal of the pipeline is always in positive pressure and free from the air, and the user can rapidly resume production.
Description
Technical field
The utility model belongs to the technical field of metallurgical industry production unit, relates to the technology of blast furnace production unit, and more particularly, the utility model relates to without gas holder single seat blast furnace produces gaspipe network.
Background technology
Because blast furnace is at the operation initial stage, produce still unstablely, what often there will be planned and unplanned property promptly cuts gas damping down.Plan damping down is cut coal gas and the unexpected chaser of blower fan, causes blast furnace to cut suddenly coal gas and happens occasionally;
Because single seat blast furnace is produced, once blast furnace is cut gas damping down, ductwork pressure sharply declines, and may cause very greatly pipe network negative pressure again, and each user has little time to close burner valve, causes back draft and other secondary serious accident.
In order to address the above problem, present most of iron and steel enterprises, under the single seat blast furnace condition of production, adopt gas holder to ensure public security to pipe network.Because some enterprise's gas holder can not synchronously put into operation in the time that blast furnace is produced, in the situation that producing without gas holder blast furnace, the hidden danger that gaspipe network security presence is very large.
Utility model content
The utility model provides a kind of and produces gaspipe network without gas holder single seat blast furnace, its objective is the safety ensureing without the gaspipe network of gas holder.
To achieve these goals, the technical scheme that the utility model is taked is:
Of the present utility model without gas holder single seat blast furnace production 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 at respectively on the nitrogen pipeline at pneumatic ball valve two ends.
The electromagnetic mechanism of described pneumatic ball valve is connected with gaspipe network Controlling System by signal line.
Described coal gas applying unit comprises that 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, the utility model also provides the above-described method for safe operation of producing gaspipe network without gas holder single seat blast furnace, and its technical scheme is:
Under the state of closing at pneumatic ball valve, the pressure drop of described gaspipe network, and drop to while being equal to or less than low pressure set(ting)value, gaspipe network Controlling System is sent the electromagnetic mechanism of signal to 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, and gaspipe network is carried out to pressurize;
Under the state of opening at pneumatic ball valve, the pressure rise of described gaspipe network, and while being raised to higher than high pressure set(ting)value, gaspipe network Controlling System is sent the electromagnetic mechanism of signal to pneumatic ball valve, controls electromagnetic mechanism action, closes the power gas source of pneumatic ball valve, pneumatic ball valve is closed, make nitrogen pipeline cut-off, low-pressure nitrogen pipe network stops supplementing nitrogen to gaspipe network, guarantees not superpressure of gaspipe network.
The pressure of described low-pressure nitrogen pipe network is 0.8MPa.
The low pressure set(ting)value of described gaspipe network is 1000Pa; High pressure set(ting)value is 3000Pa.
The utility model adopts technique scheme, guarantees that each coal gas user, in pipe network decompression situation, can close burner valve if having time, guarantees pipe network malleation, prevents back draft accident, guarantees 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 guarantee that user resumes production rapidly.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, embodiment of the present utility model is described in further detail, to help those skilled in the art to have more complete, accurate and deep understanding to inventive concept of the present utility model, technical scheme.
Structure of the present utility model as shown in the figure, produces gaspipe network for one without gas holder single seat blast furnace, and described blast furnace is iron-smelting blast furnace; Described gaspipe network is also connected with coal gas applying unit.
In order to solve the problem of prior art existence and to overcome its defect, realize the goal of the invention of guarantee without the safety of the gaspipe network of gas holder, the technical scheme that the utility model is taked is:
As shown in Figure 1, of the present utility model without gas holder single seat blast furnace production 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 utility model, guarantees 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 guarantee that rapidly user resumes production.
The utility model has solved at blast furnace and has cut suddenly gas damping down, ductwork pressure sharply declines, and causes pipe network negative pressure, and each user has little time to close in burner valve situation, and back draft does not occur blast furnace gas pipeline network, guarantees blast furnace gas system safety operation.
Low-pressure nitrogen pipe network is connected to (concrete mode of connection as shown in the figure) with the valving that blast furnace gas pipeline network consists of gate valve, pneumatic ball valve, 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 at respectively on the nitrogen pipeline at pneumatic ball valve two ends.
The utility model principal facility is the nitrogen valving shown in Fig. 1, and gate valve A is connected with blast furnace gas pipeline, and Main Function is to be used in conjunction with gate valve B; 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.
In the time that blast furnace is cut suddenly gas damping down, blast furnace gas pipeline network pressure is during 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, guarantee that each coal gas user is in pipe network decompression situation, each user can close burner valve if having time, guarantees pipe network malleation, prevents back draft accident.
Cause the accident for fear of pipeline superpressure, when blast furnace gas pipeline network pressure is higher than pressure set points, while exceeding 3000Pa, pneumatic ball valve is closed automatically simultaneously, guarantees that super high pressure accident does not occur pipe network.
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 during lower than set(ting)value, instrument control is given a signal, controls the magnetic valve of ball valve switch and opens, conducting power gas source, pneumatic ball valve is opened, and to pipe network inflated with nitrogen, pipe network is carried out to pressurize; When ductwork pressure is during higher than set(ting)value, when giving a signal, instrument control controls the closed electromagnetic valve of ball valve switch, and ball valve is closed, and stops gas line inflated with nitrogen, guarantees not superpressure of pipe network.
Described coal gas applying unit comprises that coker, generating set, naked light diffuse equipment, coal powder injection equipment, blast funnace hot blast stove, steel rolling equipment.Be denoted as in the drawings that coking, generating, naked light are diffused, 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.
Many places gate valve is also set, to control uninterrupted or to open and close pipeline in pipeline.
In order to realize the goal of the invention identical with technique scheme, the utility model also provides the above-described method for safe operation of producing gaspipe network without gas holder single seat blast furnace, and its technical scheme is:
Under the state of closing at pneumatic ball valve, the pressure drop of described gaspipe network, and drop to while being equal to or less than low pressure set(ting)value, gaspipe network Controlling System is sent the electromagnetic mechanism of signal to 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, and gaspipe network is carried out to pressurize;
Under the state of opening at pneumatic ball valve, the pressure rise of described gaspipe network, and while being raised to higher than high pressure set(ting)value, gaspipe network Controlling System is sent the electromagnetic mechanism of signal to pneumatic ball valve, controls electromagnetic mechanism action, closes the power gas source of pneumatic ball valve, pneumatic ball valve is closed, make nitrogen pipeline cut-off, low-pressure nitrogen pipe network stops supplementing nitrogen to gaspipe network, guarantees not superpressure of gaspipe network.
The pressure of described low-pressure nitrogen pipe network is 0.8MPa.
The low pressure set(ting)value of described gaspipe network is 1000Pa; High pressure set(ting)value is 3000Pa.
Low-pressure nitrogen pipe network is connected to (concrete mode of connection as shown in Figure 1) with the valving that blast furnace gas pipeline network consists of gate valve, pneumatic ball valve, 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, the gate valve of nitrogen flow before by ball valve regulates; 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 during lower than 1000Pa, use Automatic Control Theory nitrogen ball valve automatically to open, now low-pressure nitrogen enters blast furnace gas pipeline, guarantee that pipeline is in barotropic state, guarantee that each coal gas user is in pipe network decompression situation, each user can close burner valve if having time, guarantees pipe network malleation, prevents back draft accident.Cause the accident for fear of pipeline superpressure, in the time that blast furnace gas pipeline network pressure exceedes 3000Pa, nitrogen ball valve is closed automatically simultaneously, guarantees that super high pressure accident does not occur pipe network.
By reference to the accompanying drawings the utility model is exemplarily described above; obviously the utility model specific implementation is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present utility model design and technical scheme carry out; or without improving, design of the present utility model and technical scheme are directly applied to other occasion, all within protection domain of the present utility model.
Claims (7)
1. produce gaspipe network without gas holder single seat blast furnace, described blast furnace is iron-smelting blast furnace; Described gaspipe network is also connected with coal gas applying unit, it is characterized in that: described gaspipe network is connected with low-pressure nitrogen pipe network by nitrogen pipeline.
2. produce gaspipe network according to claimed in claim 1 without gas holder single seat blast furnace, it is characterized in that: described nitrogen pipeline is provided with pneumatic ball valve group.
3. produce gaspipe network according to claimed in claim 2 without gas holder single seat blast furnace, it is characterized in that: described pneumatic ball valve group comprises pneumatic ball valve and two gate valves; Two described gate valves are located at respectively on the nitrogen pipeline at pneumatic ball valve two ends.
4. produce gaspipe network according to claimed in claim 3 without gas holder single seat blast furnace, it is characterized in that: the electromagnetic mechanism of described pneumatic ball valve is connected with gaspipe network Controlling System by signal line.
5. produce gaspipe network according to claimed in claim 1 without gas holder single seat blast furnace, it is characterized in that: described coal gas applying unit comprises coker, generating set.
6. produce gaspipe network according to claimed in claim 1 without gas holder single seat blast furnace, it is characterized in that: described coal gas applying unit comprises that naked light diffuses equipment, coal powder injection equipment.
7. produce gaspipe network according to claimed in claim 1 without gas holder single seat blast furnace, it is characterized in that: described coal gas applying unit comprises blast funnace hot blast stove, steel rolling equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320669261.3U CN203602640U (en) | 2013-10-26 | 2013-10-26 | Non gas holder single-base blast furnace production gaspipe network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320669261.3U CN203602640U (en) | 2013-10-26 | 2013-10-26 | Non gas holder single-base blast furnace production gaspipe network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203602640U true CN203602640U (en) | 2014-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320669261.3U Expired - Fee Related CN203602640U (en) | 2013-10-26 | 2013-10-26 | Non gas holder single-base blast furnace production gaspipe network |
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| Country | Link |
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| CN (1) | CN203602640U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103614502A (en) * | 2013-10-26 | 2014-03-05 | 芜湖新兴铸管有限责任公司 | Gas-holder-free single blast furnace produced gas pipe network |
-
2013
- 2013-10-26 CN CN201320669261.3U patent/CN203602640U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103614502A (en) * | 2013-10-26 | 2014-03-05 | 芜湖新兴铸管有限责任公司 | Gas-holder-free single blast furnace produced gas pipe network |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140521 Termination date: 20201026 |