CN201269405Y - Gas preposition apparatus of gas turbine - Google Patents
Gas preposition apparatus of gas turbine Download PDFInfo
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- CN201269405Y CN201269405Y CNU200820172850XU CN200820172850U CN201269405Y CN 201269405 Y CN201269405 Y CN 201269405Y CN U200820172850X U CNU200820172850X U CN U200820172850XU CN 200820172850 U CN200820172850 U CN 200820172850U CN 201269405 Y CN201269405 Y CN 201269405Y
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- gas turbine
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Abstract
The utility model discloses a gas turbine pre-gas device, which comprises a gas pipeline; the gas pipeline is provided with a relief valve 1, two ends of the relief valve 1 are connected with an emptying valve 1 in parallel, and the gas pipeline is connected with a gas turbine zone. The utility model is characterized in that: the gas pipeline between the relief valve 1 and the gas turbine zone is provided with a gas buffer device, two ends of the emptying valve 1 is connected with an emptying valve 2 in parallel. After modifying the nitrogen and mixed gas pre-system, a nitrogen buffer tank can adjust the nitrogen pressure value before the switch of the oil-gas, thus satisfying the pressure requirements of the nitrogen emptying. During the switch of the oil-gas, two emptying valves and the relief valve can well cooperate with the gas turbine zone valve group so as to ensure the gas pressure is stable when completing the whole gas switch process, and the automation is realized, so the stability and the security of the gas turbine gas system are greatly improved.
Description
Technical field
The utility model relates to a kind of gas turbine front device, specifically, relates to a kind of front device of adjusting gas turbine fuel gas pipeline suction pressure.
Background technique
Gas Turbine Generating Units generally is that the employing rock gas is the unit of fuel, some gas turbine generator group also utilizes water coal slurry pressure gasification gained coal gas to be fuel, must redesign peripheral systems such as nitrogen, synthetic gas when pressing coal gas in the utilization, to adapt to the start-up course of gas turbine, the combustion gas that the utility model adopts is a synthetic gas.
The preposition nitrogen of combustion machine that uses, coal gas system technological process at present as shown in Figure 1, the gas turbine generator group is a main fuel with the middle calorific value of gas of coal water slurry gasification, the high temperature heat that the burning back produces promotes the turbine engine rotation, after the load gear-box slows down, drives generator for electricity generation.When starting, the combustion machine, switches to middle calorific value of gas after reaching certain load with the igniting of higher calorific value Diesel oil.Cutting needs before the gas blow clearly with nitrogen, and nitrogen is to come the high pressure nitrogen in autopneumatolysis workshop two step-downs enter nitrogen pot through reduction valve, establishes atmospheric valve coal gas, the air line that the back cuts before the gas gas turbine that reduce pressure once more and blow clearly behind nitrogen pot; Coal gas is that gasification oven product water gas is delivered to combustion machine battery limit (BL) after the methanol purification desulfurization, and through entering the combustion machine after coal gas compression release valve one step-down, calorific value of gas is to rated load in burning when normally moving.
The working principle of gas turbine is: gas compressor sucks air from atmosphere, and it is compressed to the certain pressure value, enter firing chamber and the fuel mix burning that sprays into then, form the combustion gas of high temperature, high pressure, the high-temperature high-pressure fuel gas with acting ability enters the turbine expansion acting, and promotion turbine rotor band gas compressor and rotated together, thereby the mechanical energy that changes into of the part of the chemical energy in the fuel, the combustion gas acting of in turbine, expanding, its pressure and temperature descends gradually, and row is to exhaust heat boiler.
Coal gas system is in the protection of turbine control system, and when gas pressure surpassed certain value, the blocking of unit superpressure was fired machine and promptly cut oil when being lower than certain value, and the combustion machine directly interdicts the jumping car when being lower than certain value again.Thereby, in former design, be provided with reduction valve one, after being decompressed to a certain appropriate value, gas pressure enters combustion machine battery limit (BL).But cut in the controlled atmosphere examination at unit oil and to find that the gas pressure fluctuation after decompression is regulated is bigger, reduction valve one vibration is serious, can't satisfy the requirement of combustion machine to gas pressure, and it is repeatedly unsuccessful to cause in the debugging oil to cut gas.
The another one problem that gas turbine exists is: before nitrogen system oil is cut gas, for blowing down the remaining air of possibility in coal gas and the compressed air line, or behind the autogenous cutting oil (or urgent blocking parking back), for blowing down the inner coal gas that may be residual of pipeline and unit, need with nitrogen it to be blown displacement clearly, blowing clearly needs to keep a period of time, and clear blow pressure power also must not be lower than the force value of demand, otherwise system can judge and blows failure clearly, does not carry out next step program.Find during test run that when blowing clearly, the clear blow pressure power of nitrogen is low, blows clearly and does not pass through.
The model utility content
Main purpose of the present utility model is to overcome the technical problem that the gas pressure fluctuation causes the gas turbine cisco unity malfunction more greatly, and the gas inlet system of redesign gas turbine provides a kind of front device of adjusting the gaspipe line suction pressure.
The utility model adopts following technological scheme to realize goal of the invention:
A kind of gas turbine combustion gas front device, comprise fuel gas pipeline, described fuel gas pipeline is provided with reduction valve one, reduction valve one two ends also are connected to exhaust-valve one, described fuel gas pipeline connects combustion machine battery limit (BL), it is characterized in that: the fuel gas pipeline between described reduction valve one and the combustion machine battery limit (BL) is provided with the combustion gas damping device, and described exhaust-valve one two ends also are connected to exhaust-valve two.
Preferably, described combustion gas damping device is the coal gas knock out drum.
Preferably, described combustion machine battery limit (BL) also is connected with nitrogen pipeline.
Preferably, described nitrogen pipeline is connected to described combustion machine battery limit (BL) by reduction valve two, nitrogen pot, the atmospheric valve that is provided with on it successively.
Preferably, the pipeline between described atmospheric valve and the combustion machine battery limit (BL) is provided with the nitrogen damping device.
Preferably, described nitrogen damping device is a nitrogen buffer tank.
Advantage of the present utility model and good effect are: after nitrogen, synthetic gas front device were transformed, nitrogen buffer tank can be regulated oil-autogenous cutting and change preceding nitrogen pressure value, has satisfied the pressure requirement that nitrogen blows clearly.Oil-autogenous cutting changes in the process, two exhaust-valves one, two and reduction valve one can cooperate the valve group action of combustion machine battery limit (BL) preferably, guarantee that stable the finishing of gas pressure wholely cut the gas process, and realized automation, improved the stability and the Security of combustion machine-made egg-shaped or honey-comb coal briquets gas system operation greatly.
Description of drawings
Fig. 1 transforms preceding front-end system structural representation for gas turbine.
Fig. 2 is the structural representation of the utility model preferred embodiment.
Among Fig. 1,1, reduction valve one, 2, nitrogen pot, 3, atmospheric valve, 4, combustion machine battery limit (BL), 5, exhaust-valve, 6, reduction valve two.
Among Fig. 2,1, reduction valve one, 2, nitrogen pot, 3, atmospheric valve, 4, combustion machine battery limit (BL), 5, exhaust-valve one, 6, reduction valve two, 7, exhaust-valve two, 8, nitrogen buffer tank, 9, the coal gas knock out drum.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment the utility model is done further to describe in detail.
Referring to Fig. 2, the utility model is stable in order to guarantee double nitrogen pressure required when blowing clearly, increases a nitrogen buffer tank 8 in reduction valve 3 backs.Blow the best automatic setting value that reduction valve 26 and atmospheric valve 3 are determined in test clearly by making the combustion machine.Nitrogen buffer tank 8 keeps the certain pressure value before driving, when combustion machine nitrogen blows clearly, nitrogen pressure slowly descends under the buffering of nitrogen buffer tank 8, when nitrogen pressure is lower than nitrogen buffer tank 8 force value, atmospheric valve 3 is opened to nitrogen buffer tank 8 pressurisings, slow down gradually the underspeeding of nitrogen pressure, final nitrogen pressure arrives a low spot (be higher than nitrogen and blow demand minimum pressure value clearly) time and slowly rises, during the clear blowing bundle of nitrogen, when nitrogen buffer tank pressure rises near atmospheric valve 3 automatic setting values, atmospheric valve 3 cuts out gradually and finally closes to zero-bit, and this moment, nitrogen buffer tank pressure rose to atmospheric valve 3 automatic setting values.
Defective at the coal gas system existence, cut the pressure of coal gas in the gas process for stabilize oil, form two sections flow regulating functions, increase being closely connected between gas turbine and the control system, for ease of the static state debugging of coal gas system, coal gas compression release valve 1 is transformed simultaneously, strengthened the pneumatic membrane head, set up accelerator and solenoid valve (not shown), improve the reduction valve adjusting function; At exhaust-valve one 5 two ends and connect exhaust-valve 27, before cutting gas, sets up by oil the emptying flow of setting respectively by exhaust-valve one, two, so that oil cut in the gas process cooperate subtract reduction valve 1 one by one linearity close, thereby the performance characteristic of simulation speed ratio valve, form two sections flow regulating functions, it is stable to guarantee to cut in the gas process gas pressure; For further stable switching and the normally gas pressure that enters the combustion machine in service, behind reduction valve 1, set up a coal gas knock out drum 9; Introduce oil gas from gas turbine and switch the trigger signal of beginning and stopping signal to control system; make the interlock program simultaneously; so as to cut mutually at oil-gas, during each operating mode operation such as emergency shutdown; control system can be controlled reduction valve and each exhaust-valve is made relevant action; be implemented under each operating mode and the emergency and can coordinate control preferably between the gas turbine engine systems and control system; thereby realize that oil-autogenous cutting changes the stable of gas pressure in the process, guarantees the handoff procedure success.After whole the transformation, the dynamic process when cutting gas and autogenous cutting oil by simulation combustion machine oil has possessed the ability of two stage type gas Flow-rate adjustment when making oil cut gas.
Certainly; above-mentioned explanation is not to restriction of the present utility model; the utility model also is not limited only to above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also belong to protection domain of the present utility model.
Claims (6)
1, a kind of gas turbine combustion gas front device, comprise fuel gas pipeline, described fuel gas pipeline is provided with reduction valve one, reduction valve one two ends also are connected to exhaust-valve one, described fuel gas pipeline connects combustion machine battery limit (BL), it is characterized in that: the fuel gas pipeline between described reduction valve one and the combustion machine battery limit (BL) is provided with the combustion gas damping device, and described exhaust-valve one two ends also are connected to exhaust-valve two.
2, gas turbine combustion gas front device according to claim 1, it is characterized in that: described combustion gas damping device is the coal gas knock out drum.
3, gas turbine combustion gas front device according to claim 1 is characterized in that: described combustion machine battery limit (BL) also is connected with nitrogen pipeline.
4, gas turbine combustion gas front device according to claim 3 is characterized in that: described nitrogen pipeline is connected to described combustion machine battery limit (BL) by reduction valve two, nitrogen pot, the atmospheric valve that is provided with on it successively.
5, gas turbine combustion gas front device according to claim 4 is characterized in that: the pipeline between described atmospheric valve and the combustion machine battery limit (BL) is provided with the nitrogen damping device.
6, gas turbine front device according to claim 5 is characterized in that: described nitrogen damping device is a nitrogen buffer tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820172850XU CN201269405Y (en) | 2008-10-07 | 2008-10-07 | Gas preposition apparatus of gas turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820172850XU CN201269405Y (en) | 2008-10-07 | 2008-10-07 | Gas preposition apparatus of gas turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201269405Y true CN201269405Y (en) | 2009-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820172850XU Expired - Lifetime CN201269405Y (en) | 2008-10-07 | 2008-10-07 | Gas preposition apparatus of gas turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201269405Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114810A (en) * | 2015-09-22 | 2015-12-02 | 赵安吉 | Pressure adjusting system for hydrogen pipe network and using method |
| CN109578145A (en) * | 2018-11-15 | 2019-04-05 | 重庆千信能源环保有限公司 | A kind of GE combustion engine starting method |
-
2008
- 2008-10-07 CN CNU200820172850XU patent/CN201269405Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114810A (en) * | 2015-09-22 | 2015-12-02 | 赵安吉 | Pressure adjusting system for hydrogen pipe network and using method |
| CN109578145A (en) * | 2018-11-15 | 2019-04-05 | 重庆千信能源环保有限公司 | A kind of GE combustion engine starting method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090708 |
|
| CX01 | Expiry of patent term |