SE410641B - GAS TURBIN VALVE DEVICE - Google Patents

Description

10 15 20 25 55 gvsozzss-z i f 2 according to the invention. Figures 5 and 4 show two, different constructive, designs of the valve according to the invention. mg 1 shows a gas turbine plant comprising a compressor 1, gesture bin 2 and two. combustion chambers 3. The compressed air is conducted. from the compressor to one each b surrounding jacket 4 through an outer tube 5 surrounding an inner tube 6 leading them the hot gases from the combustion chamber to the turbine.

As mentioned above, when using a fluidized bed burner burner, one must be able to shut down. this. completely from the plant in the event of disturbances, such as cargo loss or breakdown. At the same time must compressor air carried directly to the gas turbine, partly so as not to slow down the compressor, partly to cool the turbine. The principle for this is shown in Fig. 2, where the barrier the valves 7 ooh B have ineattsi the air and gas line 5 and 6, respectively, . while the bypass valve 9 is inserted between said two. management. when operating these valves, the valves apply. 7 and 8 must not be closed off before the bypass valve 9 has been opened to avoid violent braking of airflowpuTo secure. this coordinates the actuators of the valves suitably so. that the valve 9 'is opened before starting to switch off is ventilated. 7 and e. 'e Furthermore, the combustion chamber must be able to be read after shutting down, which can happen by means of a special valve 10, a so-called dumper valve, which leads to the plant chimney or avg reason. In the event of an accident, this is the only possible option. Is it on the other hand, just ask., if late loss, the combustion chamber can be slowly relieved to bees if: only the air and fuel supply are blocked. You can take advantage of this. the fact that it at current. dimensions and temperatures anyway. is It is difficult to make valves 7 and 8 completely tight without the risk of them becoming clamped fixed in closed position. These valves are therefore designed with a certain play and ensures that the valve 8 always has a larger play than the valve 7. On. so. show comer the combustion chamber to be slowly relieved over the valve 8, while the air supply is over venmen 7 m1- negligible.

The constructive. the design of the valve combination according to the invention appears of Fig. 3, where the valves are located in a housing 11 on. an angular bend of. coaxial- line S, 6.

Ventiler-na. 7 and 8 are suitably designed as double flap valves and as shown of the drawing, the inner gas line 6 advances in an unbroken bend, while the air line 5 is then disconnected. the valve 7 opens freely into the housing 11.

Claims (6)

The bypass valve 9 is located in a small cylindrical housing 12 located between the outer wall of the housing 11 and an inner jacket 13 which surrounds the elevation of the conduit 6. The design of the valve 9 and the housing 12 is shown in more detail in Fig. 4. To limit. the dimensions. on the valve 9 and thus on the housing 11, the valve 9 is divided into several valves, as well. can be seen from Fig. 4. Fig. 4 shows, as mentioned, a slightly different design of the valve combination, wherein the housing 11 is substantially limited to an extension. the air line 5 to make room for the bypass valves 9 and the air valve 7. the valve 9 consists of an non-cylindrical housing 12 with an opening 14 on it. the upstream side seen in relation to the air flow. The valve itself consists of a flap 15 which is located in a partition wall 16 »in the valve housing 12. In addition to functioning as bypass valves at quick stops, one or more of the valves can. 9 can be used as control valves to sound at partial load. some of the air from the compressor passes the combustion chamber and thus at a constant speed on the turbine directs the air down to the combustion chamber in relation to a reduced amount of fuel. Fig. 4 also shows actuators 17 and 18 for the valves. PATEINPKRAV A valve device for bypassing the combustion chamber tube (3) in a gas turbine plant, characterized in that the device comprises valves (7, 8) for shutting off the combustion chamber from the turbine (2) and the compressor (1) and a bypass valve (9) which directly connects the outlet side of the compressor to the inlet side of the turbine 2. Valve device. according to claim 1, characterized in that said valves (7, 8, 9) are designed as flap valves. Valve assembly according to claim 2, wherein the air line (5) from the compressor (1) to the fuel nozzle (5) surrounds the gas line (6) from the boiler and the turbine (2), characterized in that the gas line valve (8) ) are arranged inside the gas line, while the two. the other valves (7, 9) are arranged in a housing (11) surrounding the pipes. I - 7802285 -2 vaozzas-2 4 4. ' vantiianaraaing another patent hub 5, .kannataaknaa of this, to bathe laaningama (5, 6) are bent 1 angle vialpaaaagan of said nua (11) aan att luftlaanmgana (5) vantu (7) a: anaranaa i an extension of aan ana gran av aan tögaa lurtlaauingan. 5. A valve breather according to claim 3, characterized in that the bypass valve (9) comprises the breathing mats of the hub glove (15) arranged directly corresponding to the cylindrical housing (12) placed radially between the walls. in both. the wires (5, 6). 6. Valve device according to patent law 2, characterized in that said flap valves (7, 8) in the air and gas line are formed with a certain play in the closed position, the valve (8) of the gale charge (6) having a larger play than the air locks (5) valve (7). MENTIONED PUBLICATIONS: