JPH04137201U - air mixture turbine - Google Patents

Abstract

(57) [Summary] [Purpose] To start a mixture turbine without consuming valuable high-pressure steam with a high unit price. [Structure] Low-pressure, low-temperature air-fuel mixture is introduced into the low-pressure turbine (2) from the pipe (7) and started. If this happens, the high-pressure turbine (1) will idle and the temperature will rise, so in order to cool this, the air mixture is reversed from the outlet side to the inlet side of the high-pressure turbine (1) and condensed through the pipe (10). Lead to the vessel.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is applicable to air-fuel mixture turbines, especially devices that are started from the low-pressure turbine side by air-fuel mixture. related.

0002

[Conventional technology]

A mixed pressure turbine, also called a mixed pressure turbine, is a low-pressure If there is excess steam in the plant, it is introduced into the intermediate stage of the turbine to reduce pressure. It is effectively used as a power source for turbines, and is mainly used in private power generation plants. It's being used. Figures 2 and 3 both illustrate conventional air-fuel mixture turbine types. FIG.

0003 In the type shown in Fig. 2, a high pressure turbine 1 and a low pressure turbine 2 are coaxially shaped. It is housed in one compartment. And the high pressure turbine 1 has high pressure steam High pressure steam is supplied from the system via a high pressure steam inlet pipe 4. Also, low pressure turbine 2 A low pressure gas is supplied from the mixture pipe 7 to the mixture chamber provided between the high pressure turbine and the low pressure turbine 2. Pressurized steam is supplied.

0004 In the type shown in Fig. 3, the casings and shafts of the high-pressure turbine 1 and low-pressure turbine 2 are Each shaft is made separately, and both shafts are connected by a joint. Driven by steam High pressure steam is supplied to the high pressure turbine 1 from the high pressure steam system via the high pressure steam inlet pipe 4. The exhaust gas is led to the inlet of the low pressure turbine 2 through the connecting pipe 13. and, The air mixture pipe 7 from the low pressure steam system is connected to the connecting pipe 13 to drive the low pressure turbine. Serve.

[0005] Starting up such a mixture turbine is conventionally done by supplying high pressure from the high pressure steam system to the high pressure turbine. This is done by sending steam and adjusting the steam control valve 6, and after paralleling, low pressure steam is released from the low pressure steam system. This is done by sending the mixture to the mixture pipe, opening the mixture stop valve 8, and adjusting the mixture control valve 9. .

[0006]

[Problem that the idea aims to solve]

According to the conventional startup method from the high-pressure turbine side, even if there is excess steam Even if there is a Expenses cannot be ignored. In addition, the operation method that starts only from the high-pressure turbine side has a wide range of possibilities. lacking in flexibility. This becomes a negative factor for improving driving skills. Book The invention was made to overcome this drawback.

[0007]

[Means to solve the problem]

In order to solve the above-mentioned conventional problems, the present invention has been developed so that the steam outlet of the high-pressure turbine has low pressure. A device that communicates with the steam inlet of the turbine and has an air mixture inlet pipe connected to the communication part. The pipe connecting the steam inlet of the high-pressure turbine to the condenser and the closed pipe installed in the pipe are The present invention proposes an air-fuel mixture turbine characterized by being equipped with a stop valve.

[0008]

[Effect]

Starting from the low-pressure turbine side, which is coaxial with the high-pressure turbine or connected to the shaft by a joint. If the air mixture stop valve and air mixture adjustment valve are opened to allow air mixture to flow into the low pressure turbine, The air-fuel mixture flows through the low-pressure turbine and starts the low-pressure turbine. Along with this, high pressure turbine The engine also rotates, idling and performing thermal work in the absence of steam flow. This state If left as is, the temperature of the high-pressure turbine will rise until it is balanced by heat radiation. did Therefore, it is necessary to prevent the high-pressure turbine from generating heat.

[0009] Therefore, in this invention, we developed a pipe line (high-pressure turbine) from the steam inlet side of the high-pressure turbine to the condenser. - Open the shutoff valve (backflow cooling valve) installed in the bottle backflow cooling pipe. Then, low The high-pressure and low-temperature air-fuel mixture also flows into the high-pressure turbine, and the steam enters from the high-pressure turbine exhaust side. The flow flows backwards to the side to cool the high pressure turbine.

0010

【Example】 FIG. 1 is a system diagram showing one embodiment of the present invention. High pressure turbine 1 and low pressure turbine 2 are arranged coaxially (the same applies to mixed-air turbines connected by joints). low The pressure turbine 2 and the generator 3 are connected by a joint. Steam from high pressure turbine 1 A high-pressure steam inlet pipe 4 is connected to the inlet, and this pipe has a main steam stop valve 5 and a main steam stop valve 5. A steam control valve 6 is provided. Between the high pressure turbine 1 and the low pressure turbine 2, An air mixture chamber is provided, to which an air mixture inlet pipe 7 is connected, and an air mixture stop valve 8 and an air mixture stop valve 8 are connected to this pipe. An air mixture control valve 9 is provided. Also, the exhaust port of low pressure turbine 2 is used as a condenser. It is connected to the.

[0011] In this embodiment, a high pressure pipe is installed on the steam inlet side of the high pressure turbine 1 separately from the main steam inlet pipe 4. A turbine backflow cooling pipe 10 is installed, and this backflow cooling pipe 10 is connected to a low pressure turbine. It is connected to the condenser as well as the exhaust. In this pipe line 10, a high pressure turbine is installed. A backflow cooling valve (shutoff valve) 11 is provided.

0012 In such a piping system, the main steam stop valve 5 and the main steam control valve 6 are closed. If the mixture is allowed to flow into the low pressure turbine 2 from the low pressure steam system while the The bin 2 starts and at the same time the high pressure turbine 1 also rotates. Next, the steam inlet of the high pressure turbine If you open the backflow cooling valve 11 of the backflow cooling pipe 10 provided on the side, the low temperature and low pressure air-fuel mixture will flow into the high pressure tank. The steam flows backward from the exhaust side of the steam bin 1 to the steam inlet side to cool the high pressure turbine.

[0013]

[Effect of the idea]

According to this invention, it is possible to start the turbine without consuming high pressure steam. Moreover, it does not cause any trouble to the high pressure turbine side. Also, high pressure turbine and low pressure turbine The ability to start from either turbine side of the turbine increases operational flexibility. It also contributes to the improvement of technology.

[Brief explanation of drawings]

FIG. 1 is a system diagram showing a mixed air turbine according to an embodiment of the present invention.

FIG. 2 is a system diagram showing an example of a conventional air-fuel mixture turbine.

FIG. 3 is a system diagram showing another example of a conventional mixed air turbine.

[Explanation of symbols]

1 High pressure turbine 2 Low pressure turbine 3 Generator 4 High pressure steam inlet pipe 5 Steam stop valve 6 Steam control valve 7 Air mixture inlet pipe 8 Air mixture stop valve 9 Air mixture control valve 10 High pressure turbine reverse flow cooling pipe 11 High pressure turbine backflow cooling valve (shutoff valve)

Claims (1)

[Scope of utility model registration request] Claim 1: A steam outlet of a high-pressure turbine communicates with a steam inlet of a low-pressure turbine, and an air mixture inlet pipe is connected to the communication part, the pipe connecting the steam inlet of the high-pressure turbine to a condenser; , and a shutoff valve provided in the same conduit.