CN203906098U - Gas and steam combination circulating unit - Google Patents
Gas and steam combination circulating unit Download PDFInfo
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- CN203906098U CN203906098U CN201420340996.6U CN201420340996U CN203906098U CN 203906098 U CN203906098 U CN 203906098U CN 201420340996 U CN201420340996 U CN 201420340996U CN 203906098 U CN203906098 U CN 203906098U
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- 238000001514 detection method Methods 0.000 claims abstract description 39
- 238000002485 combustion reaction Methods 0.000 claims description 51
- 238000000605 extraction Methods 0.000 claims description 4
- 238000003303 reheating Methods 0.000 abstract 3
- 238000000034 method Methods 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- VEMKTZHHVJILDY-UHFFFAOYSA-N resmethrin Chemical compound CC1(C)C(C=C(C)C)C1C(=O)OCC1=COC(CC=2C=CC=CC=2)=C1 VEMKTZHHVJILDY-UHFFFAOYSA-N 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Control Of Turbines (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The utility model discloses a gas and steam combination circulating unit which comprises a steam turbine and two gas turbines, wherein each gas turbine comprises a gas turbine body, a boiler, a high-pressure system and a medium-pressure system; each boiler comprises a main high-pressure steam pipeline and a reheater; the reheaters are provided with main reheating steam pipelines; the gas and steam combination circulating unit further comprises first high-pressure detection devices arranged on the main high-pressure steam pipelines, second high-pressure detection devices arranged between the high-side-valve reheaters, third high-pressure detection devices for detecting pressures of high-pressure cylinders, first medium-pressure detection devices arranged on the main reheating steam pipelines, and a controller for controlling main steam valves, reheating steam valves, high side valves, bypass valves, medium-side valves and inlet adjustment valves. The gas and steam combination circulating unit can improve the running safety of host equipment and also increase the starting speed; energy is saved, and the operating intensity of an operator can be also reduced; the phenomenon of mis-operation is avoided.
Description
Technical field
The utility model has related to a kind of power generating equipment, especially also relates to a kind of combustion and steam Combined Cycle Unit.
Background technique
Combustion and steam Combined Cycle Unit adopts the method for operation of " two drag ", i.e. steam turbine operation of two gas turbine bands is introduced exhaust heat boiler by the exhaust of gas turbine, and the high temperature of generation, high pressure steam driving steam turbine drive steamer generating.
At present those skilled in the art and generally have following two kinds of modes during vapour: main reheated steam simultaneously and vapour, first and medium pressure steam again and high pressure steam.
In the prior art, main reheated steam while vapour adopt and manually operate, concrete steps are as follows: at the 1st combustion machine, start, steam turbine " one-to-one " mode moves, combustion machine steady load is when 30% rated load, start the 2nd combustion machine, as the master of 2 exhaust heat boilers, the temperature and pressure of reheated steam while matching, manually carries out and vapour operation.Main reheated steam simultaneously and vapour be that the main reheated steam parameter of controlling steam turbine both sides by high pressure turbine by and intermediate pressure by-pass meets and vapour requirement, then manually synchronously open gradually high pressure and middle pressure vapour mortor operated valve.Although this kind way of steam are little to the impact of steam turbine, axial displacement changes little, and operation amount is large, easily makes reheated steam pressure and temperature produce larger fluctuation, and the difficulty that simultaneously completes also vapour operation is larger.
In the prior art, first and medium pressure steam again and high pressure steam adopt manual mode to operate, concrete steps are as follows: combustion machine load is identical and at 30%-50% load, intermediate pressure by-pass valve is controlled and thrown automatically first to maintain two, and setting value is followed the reheat pressure that has moved side automatically.Reheated steam pressure, temperature meet and vapour condition after, slowly open reheated steam vapour mortor operated valve.And if before and after vapour mortor operated valve, pressure reduction is large, can suspend, and after pressure is consistent, continues to be opened into standard-sized sheet.Now intermediate pressure by-pass valve regulates automatically, maintains pressure stability and closes with certain speed.When medium pressure steam vapour, treat the also reheater inlet flow rate modulating valve complete shut-down of stove, therefore can there is not the cold crossfire of steam again, the reheated steam pressure of impact operation stove.After high pressure main steam pressure, temperature meet the requirements, high pressure turbine by and cooling water are thrown (cooling water setting value is the temperature of high-pressure cylinder steam discharge) automatically, open high pressure main steam mortor operated valve and be progressively incorporated to high pressure main steam, to treat that also the reheater entrance modulating valve of stove is opened in time, make cold reheated steam get back to corresponding reheater, then the medium pressure steam after heat directly enter steam turbine work done.When high pressure vapour mortor operated valve reach position, high pressure bypass valve complete shut-down, and steam turbine operation is when stablize, and high pressure vapour operation can complete.This kind of mode is owing to adopting manually-operable, thereby in large-scale unit complex working condition handoff procedure, the Security of unit is caused to serious threat, the unit starting speed that simultaneously also can slow down, increases operations staff's manipulation strength, easily causes the appearance of misoperation phenomenon when wasting energy.
Model utility content
In order to overcome the above-mentioned defect of prior art, technical problem to be solved in the utility model be to provide a kind of combustion and steam Combined Cycle Unit and and vapour method, itself and vapour processing ease are simple and vapour is effective.
Concrete technological scheme of the present utility model is:
A combustion and steam Combined Cycle Unit, it comprises:
Steam turbine, it comprises high-pressure cylinder and intermediate pressure cylinder;
Two gas turbines, each gas turbine comprises combustion machine, boiler, high-pressure system and medium voltage network, and each boiler comprises High Pressure Steam Host Piping and reheater, and described reheater has hot live steam piping again;
Described high-pressure system comprises high side valve, main stop valve and the by-pass valve for the outlet end of described high-pressure cylinder is connected with described reheater for described High Pressure Steam Host Piping is connected with the entry end of described high-pressure cylinder for described High Pressure Steam Host Piping is connected with described reheater, the entrance modulating valve between described by-pass valve and described reheater;
Described medium voltage network comprise the reheat stop valve for described hot live steam piping is again connected with the entry end of described intermediate pressure cylinder and be arranged on described in the side valve between hot live steam piping and described reheat stop valve again, described two middle side valves are connected with a heat supply network steam extraction head;
Described combustion and steam Combined Cycle Unit also comprises the first high-pressure detection device being arranged on High Pressure Steam Host Piping, be arranged on the second high-pressure detection device between described high side valve and described reheater, third high pressure pressure detection device for detection of high-pressure cylinder pressure, pressure pressure detection device on hot live steam piping first again described in being arranged on, one for to described main stop valve, described reheat stop valve, described high side valve, described by-pass valve, described middle side valve, the controller that described entrance modulating valve is controlled.
Preferably, described combustion and steam Combined Cycle Unit also comprises the first flow detection device being arranged on High Pressure Steam Host Piping.
Preferably, described combustion and steam Combined Cycle Unit also comprises the load detection device for detection of combustion machine load.
Adopt combustion and steam Combined Cycle Unit in the utility model and vapour process in the maximum 0.04mm of variation of the axial displacement of turbine rotor, therefore the combustion and steam Combined Cycle Unit in the utility model can improve the Security of main process equipment operation, accelerate unit starting speed simultaneously, in the time of energy saving, reduce operations staff's manipulation strength, stop the appearance that people is misoperation phenomenon.
Accompanying drawing explanation
Accompanying drawing described here is only for task of explanation, and is not intended to limit by any way the utility model scope of disclosure.In addition, the shape of each parts in figure and proportional sizes etc. are only schematically, for helping understanding of the present utility model, are not shape and the proportional sizes that specifically limits each parts of the utility model.Those skilled in the art, under instruction of the present utility model, can select various possible shapes and proportional sizes to implement the utility model as the case may be.
Fig. 1 has shown the structural principle schematic diagram of combustion and steam Combined Cycle Unit in the utility model.
The reference character of above accompanying drawing: 1, steam turbine; 11, high-pressure cylinder; 12, intermediate pressure cylinder; 20, the first combustion machine; 21, the first boiler; 22, the first High Pressure Steam Host Piping; 23, the first reheater; 24, the first hot live steam piping again; 251, the first high side valve; 252, the first main stop valve; 253, the first entrance modulating valve; 254, the first reheat stop valve; 255, side valve in first; 30, the second combustion machine; 31, the second boiler; 32, the second High Pressure Steam Host Piping; 33, the second reheater; 34, the second hot live steam piping again; 351, the second high side valve; 352, the second main stop valve; 353, the second entrance modulating valve; 354, the second reheat stop valve; 355, side valve in second; 41, the first high-pressure detection device; 42, the second high-pressure detection device; 43, third high pressure pressure detection device; 44, pressure pressure detection device in first; 45, first flow detection device; 5, by-pass valve; 6, heat supply network steam extraction head.
Embodiment
With the description of the utility model embodiment, can more be well understood to details of the present utility model by reference to the accompanying drawings.But embodiment of the present utility model described here,, for explaining the purpose of this utility model, is only to restriction of the present utility model and can not be understood as by any way.Under instruction of the present utility model, technician can conceive based on possible distortion arbitrarily of the present utility model, and these all should be regarded as belonging to scope of the present utility model.
Shown in Fig. 1, a kind of combustion and steam Combined Cycle Unit, it comprises steam turbine 1, two gas turbines.
Steam turbine 1 comprises high-pressure cylinder 11 and intermediate pressure cylinder 12.Steam turbine 1 is the transformation of energy of steam to be become to the rotary power machinery of mechanical work.
Gas turbine is that to take the gas of continuous-flow be working medium impeller High Rotation Speed, the energy of fuel is changed into the internal combustion type dynamic power machine of useful work, is the wheeled heat engine of a kind of pivoting leaf.Each gas turbine comprises combustion machine, boiler, high-pressure system and medium voltage network, and each boiler comprises High Pressure Steam Host Piping and reheater, and described reheater has hot live steam piping again; Described high-pressure system comprises high side valve, main stop valve and the by-pass valve 5 for the outlet end of described high-pressure cylinder 11 is connected with described reheater for described High Pressure Steam Host Piping is connected with the entry end of described high-pressure cylinder 11 for described High Pressure Steam Host Piping is connected with described reheater; Described medium voltage network comprise the reheat stop valve for described hot live steam piping is again connected with the entry end of described intermediate pressure cylinder 12 and be arranged on described in the side valve between hot live steam piping and described reheat stop valve again.
In the present embodiment, combustion and steam Combined Cycle Unit comprises the first gas turbine and the second gas turbine.
The first gas turbine comprises the first combustion machine 20, the first boiler 21, the first high-pressure system and the first medium voltage network, and the first boiler 21 comprises that the first High Pressure Steam Host Piping 22 and the first reheater 23, the first reheaters 23 have the first hot live steam piping 24 again; The first high-pressure system comprises the first high side valve 251, the first main stop valve 252 and the by-pass valve 5 for the outlet end of described high-pressure cylinder 11 is connected with described the first reheater 23 for described the first High Pressure Steam Host Piping 22 is connected with the entry end of described the first high-pressure cylinder 11 for described the first High Pressure Steam Host Piping 22 is connected with reheater described in first, the first entrance modulating valve 253 between described by-pass valve 5 and described the first reheater 23; The first medium voltage network comprises for by described first the first reheat stop valve 254 that hot live steam piping 24 is connected with the entry end of described intermediate pressure cylinder 12 again and be arranged on described first the first side valve 255 between hot live steam piping 24 and described the first reheat stop valve 254 again.
The second gas turbine comprises the second combustion machine 30, the second boiler 31, the second high-pressure system and the second medium voltage network, and the second boiler 31 comprises that the second High Pressure Steam Host Piping 32 and the second reheater 33, the second reheaters 33 have the second hot live steam piping 34 again; The second high-pressure system comprises the second high side valve 351 for described the second High Pressure Steam Host Piping 32 is connected with reheater described in second, the second main stop valve 352 for described the second High Pressure Steam Host Piping 32 is connected with the entry end of described the second high-pressure cylinder 11, by-pass valve 5 is connected the outlet end of described high-pressure cylinder 11 with described the second reheater 33, the second entrance modulating valve 353 between by-pass valve 5 and described the second reheater 33; The second medium voltage network comprises for by described second the second reheat stop valve 354 that hot live steam piping 34 is connected with the entry end of described intermediate pressure cylinder 12 again and be arranged on described second the second side valve 355 between hot live steam piping 34 and described the second reheat stop valve 354 again.In first, in side valve 255 and second, side valve 355 is connected with a heat supply network steam extraction head 6 respectively.
Described combustion and steam Combined Cycle Unit also comprises the first high-pressure detection device 41 being arranged on High Pressure Steam Host Piping, be arranged on the second high-pressure detection device 42 between described high side valve and described reheater, third high pressure pressure detection device 43 for detection of high-pressure cylinder 11 pressure, be arranged on the first flow detection device 45 on High Pressure Steam Host Piping, load detection device for detection of combustion machine load, pressure pressure detection device 44 on hot live steam piping first again described in being arranged on, one for to described main stop valve, described reheat stop valve, described high side valve, described by-pass valve 5, described middle side valve, the controller that described entrance modulating valve is controlled.
When starting, the first combustion machine 20 of combustion and steam Combined Cycle Unit starts, the first combustion machine 20 drives steam turbine 1 to move in " one-to-one " mode, at the first combustion machine 20 steady loads during in the rated load such as 30%, controller orders about side valve 255 in the first high side valve 251, by-pass valve 5, first and closes, and restarts the second combustion machine 30.As the master of 2 exhaust heat boilers,, the temperature and pressure of reheated steam while matching, by controller, undertaken automatically and vapour operates.
At " one-to-one ", switch in the process of " one drag two ", the second high-pressure system brings into operation: the second boiler 31 do not light a fire or initial stage main steam amount little in, under the control of controller, the second high side valve 351, the second main stop valve 352 are closed automatically.When detecting vapor pressure, the first high-pressure detection device 41 reaches 2bar, by-pass valve 5 apertures are greater than at 3 percent o'clock, the second high side valve 351 is opened, now the actual pressure of 42 pairs of high pressure turbine bies of the second high-pressure detection device carries out numerical value detection, controller is to the servo-actuated rising along with actual steam pressure rise of the pressure set points of high pressure turbine by, but setting value is to follow actual pressure forever, at this after-stage, switching value " A UP " and " A DOW " according to this pressure set points of deviation size automatic lifting between pressure set points and actual pressure to maintain between the two deviation between-1～1.5bar, be that pressure set points is followed actual pressure rising, controller orders about the aperture of by-pass valve 5 and also opens gradually thereupon.Meanwhile, this has also realized the function of part heating coil.Along with the second high side valve 351 is opened completely, when the pressure that high-pressure cylinder 11 detected when third high pressure pressure detection device 43 is greater than 2MPa, controller is limited to 40 percent aperture to the aperture of the second high side valve 351, build the pressure to red switch pressure, controller maintains red switch pressure within a certain period of time.
The second medium voltage network operation: at reheater off-duty or initial operating stage, side valve 355, the second reheat stop valve 354 are closed in second under the control of controller.When the absolute value that deducts the power of the first combustion machine 20 when the power of the second combustion machine 30 is less than 20KW, side valve 355 is opened in second.
At high-pressure system and medium voltage network after above-mentioned adjusting, high-pressure system maintains the red switch pressure of certain hour, when in first in medium voltage network, pressure pressure detection device 44 detects second the pressure on hot live steam piping 34 deducts first the absolute value of the pressure of hot main gas tube 24 is less than 0.05MPa more again, starts and vapour.When combustion and steam Combined Cycle Unit, from one-to-one pattern, cut toward two while dragging a pattern, load detection device detects in real time to the load of the first combustion machine 20 and the second combustion machine 30.Controller remains unchanged the total load of combustion and steam Combined Cycle Unit 2GT+1ST.Controller orders about along with second combustion machine on-load gradually, and orders about the corresponding decline of load of First combustion machine, and sum of the two is constant, and corresponding, the steam parameter that enters steam turbine also can decline, and is conducive to and the operation of vapour.By full factory coordinate control overhead regulating system by two combustion machine load adjustments at 100MW.Controller opens the second main stop valve 352 simultaneously and the second reheat stop valve 354 carries out and vapour; Also in vapour process, opening and be positioned at the second entrance modulating valve 353 of the second reheater 33 gradually, and closing gradually height, middle side valve, until also vapour completes.
Adopt combustion and steam Combined Cycle Unit in the utility model and vapour process in the maximum 0.04mm of variation of steam turbine 1 rotor axial displacement, therefore the combustion and steam Combined Cycle Unit in the utility model can improve the Security of main process equipment operation, accelerate unit starting speed simultaneously, in the time of energy saving, reduce operations staff's manipulation strength, stop the appearance that people is misoperation phenomenon.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiments, between each embodiment identical similar part mutually referring to.
Above-described embodiment is only explanation technical conceive of the present utility model and feature, and its object is to allow person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, within all should being encompassed in protection domain of the present utility model.
Claims (3)
1. a combustion and steam Combined Cycle Unit, it comprises:
Steam turbine, it comprises high-pressure cylinder and intermediate pressure cylinder;
Two gas turbines, each gas turbine comprises combustion machine, boiler, high-pressure system and medium voltage network, and each boiler comprises High Pressure Steam Host Piping and reheater, and described reheater has hot live steam piping again;
Described high-pressure system comprises high side valve, main stop valve and the by-pass valve for the outlet end of described high-pressure cylinder is connected with described reheater for described High Pressure Steam Host Piping is connected with the entry end of described high-pressure cylinder for described High Pressure Steam Host Piping is connected with described reheater, the entrance modulating valve between described by-pass valve and described reheater;
Described medium voltage network comprise the reheat stop valve for described hot live steam piping is again connected with the entry end of described intermediate pressure cylinder and be arranged on described in the side valve between hot live steam piping and described reheat stop valve again, described two middle side valves are connected with a heat supply network steam extraction head;
It is characterized in that:
Described combustion and steam Combined Cycle Unit also comprises the first high-pressure detection device being arranged on High Pressure Steam Host Piping, be arranged on the second high-pressure detection device between described high side valve and described reheater, third high pressure pressure detection device for detection of high-pressure cylinder pressure, pressure pressure detection device on hot live steam piping first again described in being arranged on, one for to described main stop valve, described reheat stop valve, described high side valve, described by-pass valve, described middle side valve, the controller that described entrance modulating valve is controlled.
2. combustion and steam Combined Cycle Unit according to claim 1, is characterized in that: described combustion and steam Combined Cycle Unit also comprises the first flow detection device being arranged on High Pressure Steam Host Piping.
3. combustion and steam Combined Cycle Unit according to claim 1, is characterized in that: described combustion and steam Combined Cycle Unit also comprises the load detection device for detection of combustion machine load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420340996.6U CN203906098U (en) | 2014-06-24 | 2014-06-24 | Gas and steam combination circulating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420340996.6U CN203906098U (en) | 2014-06-24 | 2014-06-24 | Gas and steam combination circulating unit |
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| Publication Number | Publication Date |
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| CN203906098U true CN203906098U (en) | 2014-10-29 |
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| CN201420340996.6U Expired - Lifetime CN203906098U (en) | 2014-06-24 | 2014-06-24 | Gas and steam combination circulating unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074610A (en) * | 2014-06-24 | 2014-10-01 | 北京京桥热电有限责任公司 | Gas-steam combined circulation machine unit and combination method thereof |
| CN108019732A (en) * | 2016-11-23 | 2018-05-11 | 林振娴 | A kind of computational methods for determining double discard heat boiler high-low pressure steam flows |
| CN113356939A (en) * | 2021-07-20 | 2021-09-07 | 广东韶钢松山股份有限公司 | Method and system for rapidly starting main pipe unit in cold state |
-
2014
- 2014-06-24 CN CN201420340996.6U patent/CN203906098U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074610A (en) * | 2014-06-24 | 2014-10-01 | 北京京桥热电有限责任公司 | Gas-steam combined circulation machine unit and combination method thereof |
| CN104074610B (en) * | 2014-06-24 | 2016-04-06 | 北京京桥热电有限责任公司 | The also vapour method of Combined cycle gas-steam turbine unit |
| CN108019732A (en) * | 2016-11-23 | 2018-05-11 | 林振娴 | A kind of computational methods for determining double discard heat boiler high-low pressure steam flows |
| CN113356939A (en) * | 2021-07-20 | 2021-09-07 | 广东韶钢松山股份有限公司 | Method and system for rapidly starting main pipe unit in cold state |
| CN113356939B (en) * | 2021-07-20 | 2022-10-14 | 广东韶钢松山股份有限公司 | Method and system for cold-state quick start of main pipe unit |
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