CN103790642A - Gas-steam combined cycle cogeneration turbine and combined cycle unit - Google Patents
Gas-steam combined cycle cogeneration turbine and combined cycle unit Download PDFInfo
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- CN103790642A CN103790642A CN201310344220.1A CN201310344220A CN103790642A CN 103790642 A CN103790642 A CN 103790642A CN 201310344220 A CN201310344220 A CN 201310344220A CN 103790642 A CN103790642 A CN 103790642A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E20/14—Combined heat and power generation [CHP]
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Abstract
An embodiment of the invention discloses a gas-steam combined cycle cogeneration turbine and combined cycle unit. The cogeneration turbine comprises a high-intermediate pressure cylinder, a low-pressure cylinder and a synchronous self-shifting (SSS) clutch, a high-intermediate pressure rotor of the high-intermediate pressure cylinder is connected with the output end of the SSS clutch, and a low-pressure rotor of the low-pressure cylinder is connected with the input end of the SSS clutch. The combined cycle unit comprises the gas-steam combined cycle cogeneration turbine. The cogeneration turbine can allow the low-pressure cylinder and the high-intermediate pressure cylinder thereof to stop running or start running when the cogeneration combined cycle unit is in a running state, and the cogeneration turbine can adopt different modes to run under different working conditions. The gas-steam combined cycle cogeneration turbine can adopt the different modes to run according to requirements, so that heat efficiency of the whole combined cycle unit is improved.
Description
Technical field
The present invention relates to dynamo-electric field, relate in particular to Gas-steam Combined Cycle co-generation turbine and Gas-steam Combined Cycle cogeneration of heat and power Combined Cycle Unit.
Background technique
Gas-steam Combined Cycle cogeneration of heat and power Combined Cycle Unit, refer to by gas turbine, exhaust heat boiler and steamer Combined Cycle Unit, both utilize gas turbine and co-generation turbine to produce electric energy, and utilized again co-generation turbine to make the power plant of the external heat supply of steam of merit.Because heat energy can be generated electricity and provide to cogeneration of heat and power Combined Cycle Unit simultaneously, than producing respectively electricity, heat energy mode, energy fuel saving improves the utilization ratio of energy resources, is a kind of power plant remarkable advantage, that have large development potentiality that have.
Because the external heat supply of cogeneration of heat and power Combined Cycle Unit is mainly by steaming the co-generation turbine realization of drawing gas, thermoelectricity is than conventionally less, in order to guarantee that the heat supply of cogeneration of heat and power Combined Cycle Unit reaches maximum, the most frequently used mode is to adopt the co-generation turbine of back pressure steam-extracting type co-generation turbine as cogeneration of heat and power Combined Cycle Unit.
Adopt and adjust the co-generation turbine of steam-extracting type co-generation turbine as cogeneration of heat and power Combined Cycle Unit, in the time of maximum heating load for guarantee co-generation turbine low pressure (LP) cylinder not because of exhaust stage blade air blast cause exhaust temperature raise, just need to there is a certain amount of cooling steam flow to lower the temperature to it, this part cooling steam does work seldom in low pressure (LP) cylinder, its entrained heat is recycled cooling water and absorbs through cooling tower consumption, this will cause heat waste, and the thermal efficiency of whole Combined Cycle Unit is low.
Summary of the invention
The embodiment of the present invention provides Gas-steam Combined Cycle co-generation turbine and Gas-steam Combined Cycle cogeneration of heat and power Combined Cycle Unit, to solve the low problem of the existing Gas-steam Combined Cycle heat supply Combined Cycle Unit thermal efficiency.
First aspect, the embodiment of the present invention provides a kind of co-generation turbine, and this co-generation turbine comprises:
High intermediate pressure cylinder, low pressure (LP) cylinder and synchronously from gear shift (SSS, SYNCHRO SELF SHIFTING) clutch, the high pressure rotor of described high intermediate pressure cylinder is connected with the output terminal of SSS clutch, and the low pressure rotor of described low pressure (LP) cylinder is connected with the input end of SSS clutch.
In conjunction with first aspect, in the possible implementation of the first, the high intermediate pressure cylinder of described co-generation turbine is connected by mesolow steam guiding tube road with low pressure (LP) cylinder, described mesolow steam guiding tube is provided with steam stop MESV and steam regulation valve MECV on road, described MESV is near described high intermediate pressure cylinder setting, described MECV is near low pressure (LP) cylinder setting, and heat supply network pump-line is connected to described in described mesolow steam guiding tube road in the part between MESV and described high intermediate pressure cylinder.
Second aspect, the embodiment of the present invention also provides a kind of Gas-steam Combined Cycle cogeneration of heat and power steamer Combined Cycle Unit, and described Combined Cycle Unit comprises the co-generation turbine described in the implementation that the first of aforementioned first aspect and first aspect is possible.
Compared with prior art, Gas-steam Combined Cycle cogeneration of heat and power machine provided by the invention can be in cogeneration of heat and power Combined Cycle Unit during in running state, make the independent out of service or startup operation with high intermediate pressure cylinder of low pressure (LP) cylinder of co-generation turbine, make co-generation turbine can under different operating modes, adopt different mode operation, for improving the low condition of having created of the thermal efficiency of whole cogeneration of heat and power Combined Cycle Unit; Gas-steam Combined Cycle co-generation turbine provided by the invention, owing to can adopt as required different mode operations under different operating modes, can improve the thermal efficiency of whole cogeneration of heat and power Combined Cycle Unit.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.Shown in accompanying drawing, above-mentioned and other object of the present invention, Characteristics and advantages will be more clear.In whole accompanying drawings, identical reference character is indicated identical part.Deliberately do not draw accompanying drawing by actual size equal proportion convergent-divergent, focus on illustrating purport of the present invention.
Fig. 1 is embodiment's block diagram of Gas-steam Combined Cycle co-generation turbine of the present invention;
Fig. 2 is another embodiment's block diagram of Gas-steam Combined Cycle co-generation turbine of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technological scheme in the embodiment of the present invention is carried out to clear, complete description, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment who obtains under creative work prerequisite, belong to the scope of protection of the invention.
Secondly, the present invention is described in detail in conjunction with schematic diagram, in the time that the embodiment of the present invention is described in detail in detail; for ease of explanation; the sectional drawing of indication device structure can be disobeyed general ratio and be done local amplification, and described schematic diagram is example, and it should not limit the scope of protection of the invention at this.In addition in actual fabrication, should comprise, the three-dimensional space of length, width and the degree of depth.
As shown in Figure 1, for one of co-generation turbine of the present invention implements block diagram.Co-generation turbine provided by the invention comprises high intermediate pressure cylinder 101, low pressure (LP) cylinder 102 and SSS clutch 103.
SSS clutch, refers to and has the synchronously clutch from gear shift (SYNCHRO SELF SHIFTING) function, synchronously refers in the time that the rotating speed tendency of SSS clutch input end exceedes output terminal from gear shift function, and clutch engagement, output terminal is driven; In the time that SSS clutch input end rotating speed tendency reduces with respect to output terminal, produce opposing torque, throw-out-of clutch.
As shown in Figure 1, SSS clutch 103 is arranged between co-generation turbine high-pressure cylinder 101 and low pressure (LP) cylinder 102, and the high pressure rotor 1011 of co-generation turbine high intermediate pressure cylinder 101 is connected by SSS clutch 103 with the low pressure rotor 1021 of low pressure (LP) cylinder 102.Specifically, the output terminal 1031 of SSS clutch 103 is connected with the high pressure rotor 1011 of co-generation turbine, the input end 1032 of SSS clutch 103 with the low pressure rotor 1021 of co-generation turbine to being connected.Generator 104 is arranged in high-pressure cylinder side, can be driven by high pressure rotor 1011 separately, also can jointly drive by meshing together by SSS clutch 103 by low pressure rotor 1021 and high pressure rotor 1011.
When the high intermediate pressure cylinder 101 of co-generation turbine and low pressure (LP) cylinder 102 are during in common running state, the high pressure rotor 1011 of co-generation turbine and low pressure rotor 1021 engage automatically by SSS clutch 103, jointly drive generator 104.
In the time that co-generation turbine low pressure (LP) cylinder 102 is out of service, after rotating speed in low pressure rotor 1021 coasting operation lower than high pressure rotor 1011, SSS clutch 103 will be thrown off off-the-line by low pressure rotor 1021 automatically, make the low pressure (LP) cylinder 102 of co-generation turbine can be independent of the high-pressure cylinder 101 of co-generation turbine out of service separately, drive separately generator 104 by high pressure rotor 101.
When low pressure (LP) cylinder 102 is when never running state puts into operation, low pressure rotor 1021 can be along with the operation speedup gradually of low pressure (LP) cylinder 102, when after the rotating speed of low pressure rotor 1021 rotating speed a little more than high pressure rotor 1011, SSS clutch 103 will engage low pressure rotor 1021 automatically with high pressure rotor 1011, common drive generator 104, thus the running state of co-generation turbine is remained on to high intermediate pressure cylinder and the common running state of low pressure (LP) cylinder 102.
Co-generation turbine provided by the invention can also comprise blocking device, and blocking device is used for locking SSS clutch 103.In the time that low pressure (LP) cylinder 102 is out of service, only in the time that SSS clutch 103 blocking devices are switched to released state, SSS clutch 103 could be thrown off off-the-line by high pressure rotor 1011 and low pressure rotor 1021, by out of service low pressure (LP) cylinder 102, for installing blocking device additional, SSS clutch 103 can prevent in running because ambient conditions affects or low pressure (LP) cylinder 102 operations occur that fluctuation causes SSS clutch 103 in the time should not throwing off off-the-line, throws off off-the-line by high pressure rotor 1011 and low pressure rotor 1021.
Can find out from above-described embodiment, steamer Combined Cycle Unit provided by the invention can be in cogeneration of heat and power Combined Cycle Unit during in running state, make the independent out of service or startup operation with high intermediate pressure cylinder of low pressure (LP) cylinder of co-generation turbine, make co-generation turbine can under different operating modes, adopt different mode operation, for improving the low condition of having created of the thermal efficiency of whole Combined Cycle Unit.
Usually, Gas-steam Combined Cycle unit can be that single shaft or multiaxis are arranged, single shaft arranges that the axle system that refers to gas turbine axle system and co-generation turbine is connected into an axle system, drives same generator jointly; Multiaxis is arranged both gas turbine and the each self-driven independent generator of co-generation turbine.Gas-steam Combined Cycle unit can also use 2 or many gas turbines as required, by a co-generation turbine of the common driving of corresponding exhaust heat boiler.What Gas-steam Combined Cycle unit great majority adopted at present is the Combined Cycle Unit collocation form of 2GTG & HRSG+1STG, use two gas turbines by a common co-generation turbine, the i.e. Combined Cycle Unit of " two drag one " form of driving of corresponding 2 exhaust heat boilers.
As shown in Figure 2, the high intermediate pressure cylinder 201 of Gas-steam Combined Cycle co-generation turbine is connected by heat supply network extraction line 204 with heat supply network 211, heat supply network extraction line 204 to heat supply network steam discharge, is provided with ELCV 206 and the heat supply network non-return flap 207 that draws gas for high intermediate pressure cylinder 201 on described heat supply network extraction line 204; High intermediate pressure cylinder 201 is connected by mesolow steam guiding tube road 205 with low pressure (LP) cylinder 202, mesolow steam guiding tube road 205 for high intermediate pressure cylinder 201 to low pressure (LP) cylinder 202 steam discharges, on mesolow steam guiding tube road 205, be provided with MESV 208 and MECV 209, MESV 208 is near described high intermediate pressure cylinder setting, MECV 209 is near low pressure (LP) cylinder setting, heat supply network pump-line 204 be connected to mesolow steam guiding tube road 205 MESV 208 and high intermediate pressure cylinder 201 part on.
Based on aforementioned co-generation turbine, the invention provides a kind of Gas-steam Combined Cycle cogeneration of heat and power steamer Combined Cycle Unit, the co-generation turbine that Combined Cycle Unit comprises is the Gas-steam Combined Cycle co-generation turbine described in previous embodiment of the present invention.Outside part apart from specified otherwise, in cogeneration of heat and power steamer Combined Cycle Unit of the present invention, in the Placement of co-generation turbine of the present invention and other equipment in cogeneration of heat and power Combined Cycle Unit and prior art, in co-generation turbine and cogeneration of heat and power Combined Cycle Unit, the Placement of other equipment is consistent.
When Combined Cycle Unit in non-when the thermal condition, the height of co-generation turbine, middle pressure rotor and low pressure rotor are linked to be an axle by SSS clutch 203, by blocking device, SSS clutch 203 is locked, high intermediate pressure cylinder 201 steam discharges are closed to the ELCV 206 on the heat supply network extraction line 204 of heat supply network 211, MESV 208 opens, and MECV 209 apertures are adjusted to maximum, and steam enters low pressure (LP) cylinder 202 and does work, exhaust steam after acting is discharged to vapour condenser 210, and now co-generation turbine is pure condensate operating mode.
At the beginning of heat supply, latter stage and heat demand amount are increasing and decreasing process gradually, Combined Cycle Unit is in the time of part heat load operating mode, co-generation turbine can adopt to be taken out solidifying mode and moves, reach desired value with the ratio that realizes heat load and electric load, take out when solidifying mode is maximum to be moved for thermal condition, MESV 208 opens, MECV 209 will ensure a minimum aperture, this aperture is set according to the difference of Combined Cycle Unit and operation conditions, prevent that low pressure (LP) cylinder 202 temperature from raising, now co-generation turbine is for taking out solidifying operating mode, also be general for the normal heat supply mode adopting of thermoelectricity plant at present.
When Winter heat supply demand large, while requiring the maximum heating load of Combined Cycle Unit band, Combined Cycle Unit is switched to back pressure mode, , SSS clutch 203 blocking devices of co-generation turbine are switched to released state, close MESV208 and MECV 209, stop to low pressure (LP) cylinder 202 admission, low pressure (LP) cylinder 202 will stop doing power, when low pressure rotor coasting operation is lower than height, after the rotating speed of middle pressure rotor, SSS clutch 203 will be thrown off off-the-line by low pressure rotor automatically, now co-generation turbine is back pressure operation pattern, control the exhaust steam pressure of high intermediate pressure cylinder to the ELCV 206 on the heat supply network extraction line 204 of heat supply network 211, the main vapour of the steam discharge of high intermediate pressure cylinder 201 and low pressure is all for heating heat exchangers for district heating, to obtain larger heat capacity and the higher thermal efficiency.
When needs are switched to Combined Cycle Unit while taking out solidifying operating mode, as long as open high intermediate pressure cylinder 201 steam discharges to MESV208 and MECV 209 on the mesolow steam guiding tube road 205 of low pressure (LP) cylinder 202, low pressure (LP) cylinder 202 is devoted oneself to work, low pressure rotor is speedup gradually, when after the rotating speed of rotating speed a little more than high rotor, SSS clutch, device 203 will start low pressure rotor acting automatically side by side.Now can use locking device that SSS clutch 203 is locked.
Take " two drag one " Gas-steam Combined Cycle steamer Combined Cycle Unit as example, 2 gas turbines of Combined Cycle Unit, drive a co-generation turbine by corresponding exhaust heat boiler is common, co-generation turbine is three pressing of providing of previous embodiment, steam discharge Gas-steam Combined Cycle co-generation turbine under heat, twin-tub again.Combined cycle steamer Combined Cycle Unit at non-heating period according to condensing or take out solidifying mode and move, winter Combined Cycle Unit back pressure heat supply running.According to Combined Cycle Unit feature, can be by the hydrophobic heat supply network vapour condenser of all getting back to, condensate pump can adopt conventionally used 3 × 50% allocation plan, fixed pressure operation, when Combined Cycle Unit is normally moved, 2 operation condensate pumps can move in high efficient area.This kind of solidifying pump allocation plan simplified whole cogeneration of heat and power heating power system, can reduce on the one hand the initial outlay of condensate pump and frequency variator thereof, saved 4 heat supply network drainage pumps and frequency variator thereof; Also can reduce on the other hand solidifying pump operation cost, the operating cost of simultaneously saving heat supply network drainage pump.
Adopt the co-generation turbine of installation SSS clutch provided by the invention, can at utmost improve Gas-steam Combined Cycle unit heat capacity, than " two drag one " Gas-steam Combined Cycle heat supply Combined Cycle Unit having put into operation under the suitable condition of generated output, heat supply is exerted oneself and is improved 15～20% left and right, and the Combined Cycle Unit thermal efficiency improves 5% left and right.Described Combined Cycle Unit can also comprise with the water-cooled heat supply network secondary of enclosed drain cooler, it is high that solution Combined Cycle Unit is taken out solidifying operating mode heat supply network drain temperature, drain into vapour condenser and will occur the hydrophobic vaporization phenomenon of heat supply network, also be convenient to Combined Cycle Unit and take out solidifying operating mode and be switched to back pressure operating mode, vapour condenser is transitioned into low vacuum state operation by high vacuum.
Can find out from above-described embodiment, between the high intermediate pressure cylinder of combined cycle cogeneration steam turbine and low pressure (LP) cylinder, connect by installing SSS clutch additional, can make co-generation turbine in pure condensate, take out under solidifying, 3 kinds of patterns of back pressure and switch, make Combined Cycle Unit changeable according to the back pressure machine method of operation in the winter time, by SSS clutch by low pressure (LP) cylinder off-the-line, whole steam discharges of intermediate pressure cylinder and the main vapour of low pressure are all for heating heat exchangers for district heating, to the heat supply of heating power outer net pipeline, improve the heat capacity of Combined Cycle Unit; Lower or non-when the thermal condition in heat load, high intermediate pressure cylinder and low pressure (LP) cylinder are linked to be an axle by clutch, and co-generation turbine changes into takes out solidifying or the pure condensate method of operation, makes Combined Cycle Unit have good generated energy and generating efficiency.
Those skilled in the art can be well understood to the mode that technology in the embodiment of the present invention can add essential general hardware platform by software and realize.Based on such understanding, the part that technological scheme in the embodiment of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product can be stored in storage medium, as ROM/RAM, magnetic disc, CD etc., comprise that some instructions (can be personal computers in order to make a computer equipment, server, or the network equipment etc.) carry out the method described in some part of each embodiment of the present invention or embodiment.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, between each embodiment identical similar part mutually referring to, what each embodiment stressed is and other embodiments' difference.Especially,, for system embodiment, because it is substantially similar in appearance to embodiment of the method, so description is fairly simple, relevant part is referring to the part explanation of embodiment of the method.
Above-described embodiment of the present invention, does not form limiting the scope of the present invention.Any modification of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (3)
1. a Gas-steam Combined Cycle co-generation turbine, is characterized in that, described co-generation turbine comprises:
High intermediate pressure cylinder, low pressure (LP) cylinder and synchronously from gear shift SSS clutch, the high pressure rotor of described high intermediate pressure cylinder is connected with the output terminal of SSS clutch, and the low pressure rotor of described low pressure (LP) cylinder is connected with the input end of SSS clutch.
2. co-generation turbine as claimed in claim 1, is characterized in that,
The high intermediate pressure cylinder of described co-generation turbine is connected by mesolow steam guiding tube road with low pressure (LP) cylinder, described mesolow steam guiding tube is provided with steam stop MESV and steam regulation valve MECV on road, described MESV is near described high intermediate pressure cylinder setting, described MECV is near low pressure (LP) cylinder setting, and heat supply network pump-line is connected to described in described mesolow steam guiding tube road in the part between MESV and described high intermediate pressure cylinder.
3. a Gas-steam Combined Cycle cogeneration of heat and power Combined Cycle Unit, is characterized in that, described Combined Cycle Unit comprises co-generation turbine as claimed in claim 1 or 2.
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| CN201310344220.1A CN103790642A (en) | 2013-08-08 | 2013-08-08 | Gas-steam combined cycle cogeneration turbine and combined cycle unit |
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| CN107013262A (en) * | 2017-05-26 | 2017-08-04 | 中国华能集团公司 | It is a kind of to cut off heating system and method that low pressure (LP) cylinder enters vapour |
| CN107687352A (en) * | 2017-07-03 | 2018-02-13 | 中国能源建设集团广东省电力设计研究院有限公司 | Combined cycle gas-steam turbine heating system |
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| CN110318832A (en) * | 2019-08-02 | 2019-10-11 | 西安西热节能技术有限公司 | A kind of cogeneration units thermoelectricity decoupling operating system of spray desuperheating |
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| CN108661726A (en) * | 2018-07-24 | 2018-10-16 | 华能国际电力股份有限公司 | A kind of low pressure cylinder cooling system that thermal power plant unit low pressure (LP) cylinder zero is contributed |
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| CN110318832A (en) * | 2019-08-02 | 2019-10-11 | 西安西热节能技术有限公司 | A kind of cogeneration units thermoelectricity decoupling operating system of spray desuperheating |
| CN110318832B (en) * | 2019-08-02 | 2024-01-23 | 西安西热节能技术有限公司 | Water spray temperature reduction thermal power cogeneration unit thermal electrolytic coupling operation system |
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Application publication date: 20140514 |