CN202946246U - Fuel switching device - Google Patents
Fuel switching device Download PDFInfo
- Publication number
- CN202946246U CN202946246U CN 201220588590 CN201220588590U CN202946246U CN 202946246 U CN202946246 U CN 202946246U CN 201220588590 CN201220588590 CN 201220588590 CN 201220588590 U CN201220588590 U CN 201220588590U CN 202946246 U CN202946246 U CN 202946246U
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- CN
- China
- Prior art keywords
- pipeline
- duty
- valve
- fuel
- blast furnace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a fuel switching device which comprises a duty gas pipeline 1 and a blast furnace gas pipeline 2, wherein the duty gas pipeline 2 is provided with a valve 5. The fuel switching device is characterized by further comprising a nitrogen pipeline 3 and a blast furnace gas switching pipeline 4, wherein the blast furnace gas switching pipeline 4 is connected with the duty gas pipeline 1 and the blast furnace gas pipeline 2; the nitrogen pipeline 3 is connected with the duty gas pipeline 1; the blast furnace gas switching pipeline 4 is provided with a valve 6; a valve 7 is additionally arranged on the duty gas pipeline; and a valve 8 is arranged on the nitrogen pipeline. The fuel switching device disclosed by the utility model can realize safe and rapid switching between the duty fuel and an alternative fuel, and can implement a remote control and operation without a field manual operation, so as to guarantee normal and safe operation of the machine set.
Description
Technical field
The utility model relates to a kind of fuel changing-over device, belongs to mechanical field.
Background technique
The low combustion value furnace gas gas turbine adopts the mode of fuel on duty (coke-stove gas) mostly in order to light a fire and to ensure public security; the continuous use of fuel on duty; cause the increase of buying, use, maintenance cost; and because the failure cause of this part causes the main equipment fault at a plurality of scenes, generation to be arranged; what according to incompletely statistics, fuel system trouble reason on duty caused in the reason of unit disorderly closedown accounts for 27%.
The Taiyuan Iron and Steel Co. energy source and power CCPP of factory generator set gas turbine adopts Mitsubishi M251 type, in order to light a fire and to ensure public security, unit disposes coke-stove gas fuel system on duty, can cut off the supply of fuel on duty through overtesting and operating experience proof under the operating mode of the normal operation of unit, but can not mechanically turn off the coke gas supply valve, only close and supply the tempering that valve easily causes supply line, the danger of blasting.Utilize the blast furnace gas of unit to replace fuel on duty can solve this danger, but need design one cover to switch fast the device of two kinds of fuel.
Summary of the invention
In order to address the above problem, the utility model provides a kind of fuel changing-over device, carries out null value class fuels run under the operating mode of the normal operation of unit, can switch fast the fuel on duty that puts into operation when unit need to be ensured public security.
The technical solution adopted in the utility model is: a kind of fuel changing-over device, comprise gaspipe line 1 on duty, blast furnace gas pipeline 2, wherein gaspipe line 1 on duty is provided with valve 5, it is characterized in that: this device comprises that also nitrogen pipeline 3 and blast furnace gas switch pipeline 4, wherein blast furnace gas switches pipeline 4 connection gaspipe line 1 on duty and blast furnace gas pipelines 2, nitrogen pipeline 3 connects gaspipe line 1 on duty, blast furnace gas switches pipeline 4 and is provided with valve 6, have additional valve 7 on gaspipe line on duty, nitrogen pipeline is provided with valve 8.
In the situation that unit has fuel on duty, to open and close other valve, fuel on duty enters burner combustion, keeps original fuel system on duty; Unit will be realized null value class fuel, when cutting off coke-stove gas, can not simply close the valve on gaspipe line on duty, and this processing ease generation tempering is dangerous.During switching, at first open the valve 6 on blast furnace gas switching pipeline, throttle down 7 utilizes blast furnace gas to replace coke-stove gas, and guaranteeing has the fuel forward flow in fuel channel on duty, reverse flow does not occur produce tempering; Then throttle down 5, open the valve 8 on nitrogen pipeline, are filled with high pressure nitrogen between valve 7 and valve 5, utilize the inertia of nitrogen thoroughly operational system and coke oven gas system to be separated safely.Above all valves are selected pneumatic execution, and the operation of valve can realize distant place procedure operation, need not execute-in-place, avoid operator that the danger of gas poisoning occurs.
The fuel changing-over device that the utility model provides can be realized the switching safely and fast of fuel on duty and replacement fuel, and control operation in the distance, need not manual operation at the scene, guarantees the normal safe operation of unit.
Below in conjunction with drawings and Examples, the utility model is described further.
Description of drawings
Fig. 1 is the structural representation of existing fuel changing-over device.
Fig. 2 is the structural representation of the utility model fuel changing-over device.
In figure, 1 is gaspipe line on duty, and 2 is the blast furnace gas pipeline, and 3 is nitrogen pipeline, and 4 for blast furnace gas switches pipeline, and 5,6,7,8 is valve, and 9 is burner.
Embodiment
Embodiment:
As shown in Figure 1, existing fuel changing-over device comprises gaspipe line 1 on duty and blast furnace gas pipeline 2, and the valve 5 during switching on direct control gaspipe line 1 on duty, this device cause that easily tempering is dangerous.
As shown in Figure 2, the fuel changing-over device that the utility model provides, comprise gaspipe line 1 on duty, blast furnace gas pipeline 2, wherein gaspipe line 1 on duty is provided with valve 5, it is characterized in that: this device comprises that also nitrogen pipeline 3 and blast furnace gas switch pipeline 4, wherein blast furnace gas switches pipeline 4 connection gaspipe line 1 on duty and blast furnace gas pipelines 2, nitrogen pipeline 3 connects gaspipe line 1 on duty, blast furnace gas switches pipeline 4 and is provided with valve 6, have additional valve 7 on gaspipe line on duty, nitrogen pipeline is provided with valve 8.
In the situation that unit has fuel on duty, valve 5,7 is in open mode, and valve 6,8 is in closed condition, and fuel on duty enters burner combustion by valve 5,7, keeps original fuel system on duty; Unit will be realized null value class fuel, and when cutting off coke-stove gas, simply throttle down 5, and tempering danger easily occurs.During switching, at first open valve 6, throttle down 7 utilizes blast furnace gas to replace coke-stove gas, and guaranteeing has the fuel forward flow in fuel channel on duty, reverse flow does not occur produce tempering; Then throttle down 5, open valve 8, are filled with high pressure nitrogen between valve 7 and valve 5, utilize the inertia of nitrogen thoroughly operational system and coke oven gas system to be separated safely.Above all valves are selected pneumatic execution, and the operation of valve can realize distant place procedure operation, need not execute-in-place, avoid operator that the danger of gas poisoning occurs.
Taiyuan Iron and Steel Co. energy source and power brand-name computer group began this fuel changing-over device on probation at the beginning of 2012 9 months, in process of the test, the switching of fuel changing-over device fast, accurately, is satisfied the requirement that unit changed or withdrawed from the fuel mode operation of null value class over to, and operational effect is good.
Claims (1)
1. fuel changing-over device, comprise gaspipe line on duty (1), blast furnace gas pipeline (2), wherein gaspipe line on duty (1) is provided with valve (5), it is characterized in that: this device comprises that also nitrogen pipeline (3) and blast furnace gas switch pipeline (4), wherein blast furnace gas switching pipeline (4) connects gaspipe line on duty (1) and blast furnace gas pipeline (2), nitrogen pipeline (3) connects gaspipe line on duty (1), blast furnace gas switches pipeline (4) and is provided with valve (6), have additional valve (7) on gaspipe line on duty, nitrogen pipeline is provided with valve (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220588590 CN202946246U (en) | 2012-11-09 | 2012-11-09 | Fuel switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220588590 CN202946246U (en) | 2012-11-09 | 2012-11-09 | Fuel switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202946246U true CN202946246U (en) | 2013-05-22 |
Family
ID=48421954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220588590 Expired - Fee Related CN202946246U (en) | 2012-11-09 | 2012-11-09 | Fuel switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202946246U (en) |
-
2012
- 2012-11-09 CN CN 201220588590 patent/CN202946246U/en not_active Expired - Fee Related
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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: 20130522 Termination date: 20181109 |