CN101922315A

CN101922315A - Steam supplementing type turbine and steam supplementing device thereof

Info

Publication number: CN101922315A
Application number: CN 201010287109
Authority: CN
Inventors: 潘世明; 张佩娟; 高开向; 韩守晓
Original assignee: QINGDAO JIENENG POWER STATION ENGEERING CO Ltd
Current assignee: QINGDAO JIENENG POWER STATION ENGEERING CO Ltd
Priority date: 2010-09-16
Filing date: 2010-09-16
Publication date: 2010-12-22
Anticipated expiration: 2030-09-16
Also published as: CN101922315B

Abstract

The invention discloses a turbine steam supplementing device which comprises a steam supplementing valve and a steam supplementing cylinder, wherein a steam supplementing opening is arranged on the steam supplementing cylinder; the steam supplementing valve is connected with the steam supplementing opening; and a steam supplementing mixed chamber in the steam supplementing cylinder has a volute type structure. In the invention, the steam supplementing mixed chamber in the steam supplementing cylinder is designed into the volute type structure by a full tree-dimensional technology according to the flow characteristic after main steam and supplemented steam are mixed and in accordance with a volute theory. By designing the steam supplementing mixed chamber into the volute type, the steam chamber space filled with the supplemented steam is increased, thus the supplemented steam can be rapidly dispersed after entering the cylinder so as to reduce the impact on a main stream flow; the stream flows as even as possible, and the flow efficiency reaches an optimal value; and the invention has less steam energy loss and high efficiency inside the turbine and effectively utilizes residual heat.

Description

Steam compensating turbine and filling device thereof

Technical field

The present invention relates to the steam turbine technology field, more particularly, relate to a kind of steam compensating turbine and filling device thereof.

Background technique

Existing steam compensating turbine often has problems such as filling instability or filling difficulty, analyze reason, be because some unit filling chamber design is unreasonable, some in addition change extraction opening into filling mouth and move as steam compensating turbine, run counter to this principle of through-current capability that steam compensating turbine should strengthen the mesolow cylinder.The through-current capability of back cylinder of unit has been considered extraction flow owing to draw gas, and more the do not draw gas flow area of unit of its flow area is little, so the steam flow that is in operation is bigger, causes vapor lock.The filling point pressure is raised, and makes steam and the steam turbine filling point place difficulty that must mend that suitable pressure reduction be arranged, so filling is difficult.

Because space, filling chamber is big inadequately, steam to be mended can not spread rapidly after entering cylinder, can impact main steam flow, makes steam flow evenly not flow.Reduced utilization rate of waste heat.

Summary of the invention

In view of this, the invention provides a kind of steam compensating turbine and filling device thereof,, improve utilization rate of waste heat, increase generated energy to reduce the impact of filling to main steam flow.

For achieving the above object, the invention provides following technological scheme:

A kind of steam turbine filling device comprises filling valve and filling cylinder, and described filling cylinder is provided with filling mouth, and described filling valve links to each other with described filling mouth, and the filling mixing chamber of described filling cylinder inside is the scroll casing type structure.

Preferably, in above-mentioned steam turbine filling device, also comprise the electric liquid interlock adjusting fast valve that is connected between described filling valve and the described filling mouth.

Preferably, in above-mentioned steam turbine filling device, the filling passage of described filling mixing chamber is a scroll casing type annular filling passage.

A kind of steam compensating turbine comprises aforesaid steam turbine filling device.

From above-mentioned technological scheme as can be seen, the present invention presses the spiral case theory by the filling mixing chamber with filling cylinder inside according to main vapour, the mixed flow characteristic of filling, becomes the scroll casing type structure with complete three-dimensional art designs.By the filling mixing chamber is designed to scroll casing type, strengthened the steam chest space that filling enters, so that filling can be spread the impact that has reduced main steam flow rapidly after entering cylinder, steam flow is evenly flowed as far as possible, flow efficiency reaches optimum value, the steam energy loss is little, has effectively utilized waste heat, steam turbine internal efficiency height.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technological scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

The structural representation of the filling steam turbine that Fig. 1 provides for the embodiment of the invention;

The structural representation of the steam turbine filling mixing chamber that Fig. 2 provides for the embodiment of the invention;

The outline drawing of the steam turbine filling mixing chamber that Fig. 3 provides for the embodiment of the invention;

The steam turbine filling device control principle figure that Fig. 4 provides for the embodiment of the invention;

The steam turbine filling adjustment module figure that Fig. 5 provides for the embodiment of the invention.

Embodiment

The invention discloses a kind of steam compensating turbine and filling device thereof,, improve utilization rate of waste heat, increase generated energy to reduce the impact of filling to main steam flow.

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technological scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiments.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment who is obtained under the creative work prerequisite.

Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and other embodiments' difference that identical similar part is mutually referring to getting final product between each embodiment.

See also Fig. 1-Fig. 5, the structural representation of the filling steam turbine that Fig. 1 provides for the embodiment of the invention; The structural representation of the steam turbine filling mixing chamber that Fig. 2 provides for the embodiment of the invention; The outline drawing of the steam turbine filling mixing chamber that Fig. 3 provides for the embodiment of the invention; The steam turbine filling device control principle figure that Fig. 4 provides for the embodiment of the invention; The steam turbine filling adjustment module figure that Fig. 5 provides for the embodiment of the invention.

Wherein, 1 is filling valve, and 2 is that fast valve is regulated in electric liquid interlock, and 3 is filling cylinder, and 4 are the filling mixing chamber, and 5 is condenser, and 6 is filling mouth.

Steam turbine filling device provided by the invention comprises filling valve 1 and filling cylinder 3, and described filling cylinder 3 is provided with filling mouth 6, and filling mouth 6 is for waiting to mend the steam inlet of low pressure steam, and filling valve 1 links to each other with filling mouth 6, and filling valve 1 is the valve that filling enters filling cylinder 3.Wherein, the filling mixing chamber 4 of described filling cylinder 3 inside is the scroll casing type structure.

The present invention presses the spiral case theory by the filling mixing chamber 4 with filling cylinder 3 inside according to main vapour, the mixed flow characteristic of filling, becomes the scroll casing type structure with complete three-dimensional art designs.By filling mixing chamber 4 is designed to scroll casing type, strengthened the steam chest space that filling enters, so that filling can be spread rapidly after entering cylinder, reduced impact to main steam flow, steam flow is evenly flowed as far as possible, and flow efficiency reaches optimum value, and the steam energy loss is little, effectively utilized waste heat, steam turbine internal efficiency height.

Fast valve 2 is regulated in also the be connected with electric liquid interlock of steam turbine filling device provided by the invention between described filling valve 1 and described filling mouth 6, and steam turbine filling amount is regulated fast valve 2 controls by electric liquid interlock.Before filling valve 1 was contained in electric liquid interlock adjusting fast valve 2, the switch of filling valve 1 was interlocked by electric-regulating device control and with main inlet throttle-stop valve, in emergency circumstances any, and fast shut-off filling automatically; When steam turbine normally moves, can cut off filling at any time by force.

The filling passage of the filling mixing chamber 4 in the steam turbine filling device provided by the invention is a scroll casing type annular filling passage, makes steam cover steam turbine smoothly, makes the filling part mix the back acting with the main steam part along circumference full and uniformly, and the steam energy loss is little.And this filling device can reach automatic control and adjustment filling amount, has effectively utilized waste heat, steam turbine internal efficiency height.

See also Fig. 5, the filling adjustment module figure of the steam turbine that Fig. 5 provides for the embodiment of the invention.

During steam turbine operation, the steam that enters from high-pressure autoclave, enter the acting of steam turbine high pressure section by main inlet throttle-stop valve, the steam that enters from low pressure boiler passes through filling valve 1 to filling mouth 6, then by filling mixing chamber 4, in steam turbine,,, enter condenser 5 at last in the acting of cylinder low pressure stage along the circumferential direction with after front master's steam flow carries out full and uniform the mixing.

The present invention also provides a kind of steam compensating turbine with above-mentioned filling device.

To the above-mentioned explanation of the disclosed embodiments, make related domain professional and technical personnel can realize or use the present invention.Multiple modification to these embodiments will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to these embodiments shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

Claims

1. a steam turbine filling device comprises filling valve and filling cylinder, and described filling cylinder is provided with filling mouth, and described filling valve links to each other with described filling mouth, it is characterized in that, the filling mixing chamber of described filling cylinder inside is the scroll casing type structure.

2. steam turbine filling device as claimed in claim 1 is characterized in that, also comprises the electric liquid interlock adjusting fast valve that is connected between described filling valve and the described filling mouth.

3. steam turbine filling device as claimed in claim 1 is characterized in that, the filling passage of described filling mixing chamber is a scroll casing type annular filling passage.

4. a steam compensating turbine is characterized in that, comprises each described steam turbine filling device as claim 1-3.