CN103883364B - Solve the method for cogeneration of heat and power, split axle heat supply Turbo-generator Set and operation method - Google Patents
Solve the method for cogeneration of heat and power, split axle heat supply Turbo-generator Set and operation method Download PDFInfo
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Abstract
A kind of method, split axle heat supply Turbo-generator Set and operation method solving cogeneration of heat and power, comprise at least two steam turbine, steam turbine is divided into top turbine and base turbine, top turbine is back pressure turbine or extraction back pressure turbine, base turbine is pure condensed steam formula low-pressure turbine, top turbine is connected by pipeline with base turbine, and the connecting tube of top turbine and base turbine is arranged and goes user pipe, pipeline is controlled by pipe control part; Every platform top turbine all respectively configures 1 steam turbine generator, and base turbine configures vapour condenser at configuration 1 steam turbine generator simultaneously.The present invention utilizes back pressure turbine and low pressure parameter pure condensate formula steam turbine technology, by carrying out split axle combination to two kinds of types, realization can back pressure, can steam extraction and condensing, can pure condensate roadability, the generating thermal efficiency of unit will be greatly improved during back pressure operation pattern, when steam extraction and condensing formula or pure condensate formula operating mode, will greatly improve the operational flexibility of unit.
Description
Technical field
The invention belongs to power field, particularly relate to Turbo-generator Set.
Background technique
Conventional Turbo-generator Set for cogeneration of heat and power in thermal power industry is generally divided into back pressure type, takes out back of the body formula, condensing bleeder turbine unit, back pressure type and take out the back of the body formula unit affected by hot loading restriction tighter, when heat load just can not generate electricity lower than during certain limit, the operational flexibility of back pressure unit is poor; Although condensing bleeder turbine unit can extraction for heat supply, also can pure condensate run, operational flexibility is stronger, but low pressure rotor windage loss causes temperature to rise the Security directly affecting unit operation, must ensure that low pressure (LP) cylinder has one cooling flow, this part cooling flow enters vapour condenser after promoting low pressure rotor acting, in vapour condenser, heat release becomes water of condensation, a large amount of cold source energies is there is in heat exchanging process, this some vapor amount reduces the heat capacity of unit, institute's generated energy is pure condensate generating electricity, greatly reduces the generating thermal efficiency.
Adapting to heat load changing capability for strengthening Turbo-generator Set, improving the generating thermal efficiency, improving operational flexibility, each turbine making business in the world strengthens research and development capabilities one after another, develops new steam turbine pattern, to meet the requirement of various operating mode, various condition.Generally target be the method for operation realize can draw gas, can back pressure, can pure condensate run, can back pressure operation at Heating Period, expand unit Heating Load heat capacity, improve the generating thermal efficiency, can steam extraction and condensing formula run at non-heating period, industrial heat load being provided, can pure condensate running when there is no heat load.But Problems existing is all confined to single shafting unit increase clutch and realizes above-mentioned target, and the reliability of clutch directly determines the reliability of unit operation, and steam turbine is owing to being single shafting, generator needs to be arranged in high pressure cylinder end, cause turbine body structural modification very large, the steam turbine price of clutch and new structure is all very expensive, has certain feasibility for large sized unit, and for small-load generators, substantially do not possess the Economy of exploitation.
Summary of the invention
In order to solve single shafting steam turbine realize cogeneration of heat and power time, the problem that complex structure, lattice are all very expensive, the invention provides and a kind ofly utilize conventional Turbo-generator Set to solve the method for cogeneration of heat and power, and provide a kind of split shaft cogeneration of heat and power Turbo-generator Set.
Utilize conventional Turbo-generator Set to solve a method for cogeneration of heat and power, comprise the following steps:
A. at least 1 back pressure turbine or extraction back pressure turbine is selected, at least 1 pure condensed steam formula low-pressure turbine, carry out cogeneration of heat and power, before condensed steam type low-pressure turbine, heat-obtaining supplies outward, described back pressure turbine or extraction back pressure turbine are top turbine, and pure condensed steam formula low-pressure turbine is base turbine;
B. parameter is determined
Determine heat user demand parameter,
External heating parameter is determined according to heat user demand parameter,
According to electric user's request parameter determination supplying power for outside parameter,
According to external heating parameter and supplying power for outside parameter determination base turbine and top turbine boundary parameter, base turbine admission flow needs by choosing after top turbine exhaust steam flow, the flux matched calculating of thermal load demands;
C. steam turbine is determined
According to boundary parameter, determine base turbine capacity and top turbine capacity;
According to top turbine, base turbine and heat load supply balance, determine top turbine quantity, base turbine quantity.
D. cogeneration of heat and power is realized
By top turbine and base turbine according to can draw gas, can back pressure, can pure condensate run, can back pressure operation at Heating Period, expand unit Heating Load heat capacity, improve the generating thermal efficiency, can steam extraction and condensing formula run at non-heating period, industrial heat load is provided, the requirement that runs of pure condensate can carries out the control connection of pipeline when there is no heat load, realizing cogeneration of heat and power.
A kind of split shaft heat supply Turbo-generator Set, comprise at least two steam turbine, described steam turbine is divided into top turbine and base turbine, top turbine is back pressure turbine or extraction back pressure turbine, base turbine is pure condensed steam formula low-pressure turbine, top turbine is connected by pipeline with base turbine, and the connecting tube of top turbine and base turbine is arranged and goes user pipe, pipeline is controlled by pipe control part; Every platform top turbine all respectively configures 1 steam turbine generator, and base turbine configures vapour condenser at configuration 1 steam turbine generator simultaneously.
Described split shaft heat supply Turbo-generator Set, described top turbine and base turbine are respectively 1 and are connected in series, the pipe control part that top turbine and base turbine connecting tube are arranged is steam discharge check valve, dynamic Control shut-off valve, base turbine body wears the institution of distributing gas or modulating valve, steam discharge check valve and between pipeline on arrange and go user pipe, go user pipe is established externally for heat regulating valve.
Described split shaft heat supply Turbo-generator Set, described top turbine is, after 2-4 platform is arranged in parallel, be connected in series with base turbine.
Described split shaft heat supply Turbo-generator Set, described top turbine is 2, and base turbine is 1, and described pipe control part is, on the parallel pipeline of first top turbine, sets gradually the first steam discharge check valve, the first dynamic Control shut-off valve; On the parallel pipeline of second top turbine, set gradually the second steam discharge check valve, the second dynamic Control shut-off valve; Serial pipe sets gradually the 3rd dynamic Control shut-off valve, modulating valve, on first dynamic Control shut-off valve or the pipeline between the second dynamic Control shut-off valve and the 3rd dynamic Control shut-off valve, user pipe is gone in setting, goes user pipe to set gradually external heat supply shut-off valve, externally supply heat regulating valve.
Split shaft heat supply Turbo-generator Set using method, its method of operation is as follows: when Heating Period heat demand amount is larger, close dynamic Control shut-off valve, modulating valve, base turbine is stopped transport, top turbine, back pressure operation, outer for heat regulating valve, externally heat supply shut-off valve unlatching, directly externally heat supply, by regulating thermoelectricity load for heat regulating valve, it is now pure back pressure turbine operating mode.
Reduce with heat load at non-heating period, 1 top turbine of can stopping transport, generally when separate unit back pressure unit displacement exceedes thermal load demands 20%, start base turbine.Now open dynamic Control shut-off valve, modulating valve, base turbine puts into operation, top turbine or back pressure operation, external for heat regulating valve, externally heat supply shut-off valve unlatching, by distributing pure condensate unit throttle flow and external heating load for heat regulating valve and modulating valve combine regulation, unit enters steam extraction and condensing formula operating mode.
If be the preposition back pressure turbine of multiple stage, can to stop transport top turbine by platform; In like manner increasing requirement for meeting generated energy, also can start base turbine, 1 base turbine configuration multiple stage top turbine runs.
When heat load is decreased to zero, close externally for heat regulating valve, externally heat supply shut-off valve, unit proceeds to straight condensing turbine operating mode.
Adopt the present invention of technique scheme, utilize mature back pressure turbine and low pressure parameter pure condensate formula steam turbine technology, by carrying out split axle combination to two kinds of types, unit after combination realize can back pressure, can steam extraction and condensing, can pure condensate roadability, the generating thermal efficiency of unit will be greatly improved during back pressure operation pattern, when steam extraction and condensing formula or pure condensate formula operating mode, will greatly improve the operational flexibility of unit.Because a whole set of Turbo-generator Set is the split shaft combination that dissimilar steam turbine carries out, large change need not be carried out to the body structure Design and manufacture of steam turbine, by the innovation to system Placement, parameter configuration, control system, realization can back pressure, can steam extraction and condensing, can pure condensate operation function, compared with realizing said function with employing clutch single shaft Turbo-generator Set, substantially increase the reliability of unit, reduce the cost of engineering.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention.
Embodiment
Utilize conventional Turbo-generator Set to solve a method for cogeneration of heat and power, comprise the following steps:
A. at least 1 back pressure turbine or extraction back pressure turbine is selected, at least 1 pure condensed steam formula low-pressure turbine, carry out cogeneration of heat and power, before condensed steam type low-pressure turbine, heat-obtaining supplies outward, described back pressure turbine or extraction back pressure turbine are top turbine, and pure condensed steam formula low-pressure turbine is base turbine; Typical case illustrates and sees below.
B. parameter is determined:
Determine heat user demand parameter, routine heat user demand parameter is 0.4MPa, 180 DEG C, maximum 80.32t/h, the minimum 12.5t/h of average 60t/h;
External heating parameter is determined, 0.6MPa, 200 DEG C, maximum 80.32t/h, the minimum 12.5t/h of average 60t/h according to heat user demand parameter;
According to electric user's request parameter determination supplying power for outside parameter, determine by " electricity determining by heat " principle, maximum output power presses 8MW.
According to external heating parameter and supplying power for outside parameter determination base turbine and top turbine boundary parameter, by 0.6MPa, 200 DEG C of parameter boundary, base turbine admission flow needs by choosing after top turbine exhaust steam flow, the flux matched calculating of thermal load demands, be 26t/h to the maximum, minimum is 0t/h;
C. steam turbine is determined:
According to boundary parameter, determine base turbine capacity and top turbine capacity; Base turbine capacity is 4MW, 9.4MW.
According to top turbine, base turbine and heat load supply balance, determine that top turbine quantity is 2, base turbine quantity is 1.
D. realize cogeneration of heat and power: by top turbine and base turbine according to can draw gas, can back pressure, can pure condensate run, can back pressure operation at Heating Period, expand unit Heating Load heat capacity, improve the generating thermal efficiency, can steam extraction and condensing formula run at non-heating period, industrial heat load is provided, the requirement that runs of pure condensate can carries out the control connection of pipeline when there is no heat load, realizing focus coproduction.
A kind of split shaft heat supply Turbo-generator Set, comprise at least two steam turbine, described steam turbine is divided into top turbine 1 and base turbine 3, top turbine 1 is back pressure turbine or extraction back pressure turbine, base turbine 3 is pure condensed steam formula low-pressure turbine, top turbine 1 is connected by pipeline with base turbine 3, and the connecting tube of top turbine 1 and base turbine 3 is arranged and goes user pipe, pipeline is controlled by pipe control part; Every platform top turbine all respectively configures 1 steam turbine generator 12,22, and base turbine configures vapour condenser 5 at configuration 1 steam turbine generator 4 simultaneously.
Described split shaft heat supply Turbo-generator Set, described top turbine and base turbine are respectively 1 and are connected in series, the pipe control part that top turbine and base turbine connecting tube are arranged is steam discharge check valve 13, dynamic Control shut-off valve 6, base turbine body wears the institution of distributing gas or modulating valve 7, steam discharge check valve 13 and between pipeline on arrange and go user pipe, go user pipe is established externally for heat regulating valve 8.
Described split shaft heat supply Turbo-generator Set, described top turbine can be after 2-4 platform is arranged in parallel, and is connected in series with base turbine.
Described split shaft heat supply Turbo-generator Set, described top turbine is 2, and base turbine is 1, and described pipe control part is, on the parallel pipeline of first top turbine 11, set gradually the first steam discharge check valve 13, first dynamic Control shut-off valve 14; On the parallel pipeline of second top turbine 21, set gradually the second steam discharge check valve 23, second dynamic Control shut-off valve 24; Serial pipe sets gradually the 3rd dynamic Control shut-off valve 6, modulating valve 7, on first dynamic Control shut-off valve 14 or the pipeline between the second dynamic Control shut-off valve 24 and the 3rd dynamic Control shut-off valve 6, user pipe is gone in setting, goes user pipe to set gradually external heat supply shut-off valve 9, externally for heat regulating valve 8.
Described split shaft heat supply Turbo-generator Set using method, its method of operation is as follows:
When Heating Period heat demand amount is larger, close dynamic Control shut-off valve 6, modulating valve 7, base turbine 3 is stopped transport, top turbine 11,12 back pressure operation, outer heat regulating valve 8, externally the heat supply shut-off valve 9 of supplying is opened, directly externally heat supply, by regulating thermoelectricity load for heat regulating valve 8, is now pure back pressure turbine operating mode.
Reduce with heat load at non-heating period, 1 top turbine of can stopping transport, generally when separate unit back pressure unit displacement exceedes thermal load demands 20%, start base turbine.Now open dynamic Control shut-off valve 6, modulating valve 7, base turbine 3 puts into operation, top turbine 11 or 12 back pressure operation, external heat regulating valve 8, externally the heat supply shut-off valve 9 of supplying is opened, by externally distributing pure condensate unit throttle flow and external heating load for heat regulating valve 8 and modulating valve 7 combine regulation, unit enters steam extraction and condensing formula operating mode.
If be the preposition back pressure turbine of multiple stage, can to stop transport top turbine by platform; In like manner increasing requirement for meeting generated energy, also can start base turbine, 1 base turbine configuration multiple stage top turbine runs.
When heat load is decreased to zero, close externally for heat regulating valve 8, externally heat supply shut-off valve 9, unit proceeds to straight condensing turbine operating mode.
Claims (2)
1. a split shaft heat supply Turbo-generator Set; comprise at least two steam turbine; it is characterized in that: described steam turbine is divided into top turbine and base turbine; top turbine is back pressure turbine or extraction back pressure turbine; base turbine is pure condensed steam formula low-pressure turbine; top turbine is connected by pipeline with base turbine, and the connecting tube of top turbine and base turbine is arranged and goes user pipe, pipeline is controlled by pipe control part; Every platform top turbine all respectively configures 1 steam turbine generator, and base turbine configures vapour condenser at configuration 1 steam turbine generator simultaneously;
Described top turbine be 2 be arranged in parallel after, be connected in series with base turbine, base turbine is 1; Described pipe control part is: on the parallel pipeline of first top turbine (11) steam discharge, sets gradually the first steam discharge check valve (13), the first dynamic Control shut-off valve (14); On the parallel pipeline of second top turbine (21) steam discharge, set gradually the second steam discharge check valve (23), the second dynamic Control shut-off valve (24); Serial pipe sets gradually the 3rd dynamic Control shut-off valve (6), modulating valve (7), on first dynamic Control shut-off valve (14) or the pipeline between the second dynamic Control shut-off valve (24) and the 3rd dynamic Control shut-off valve (6), user pipe is gone in setting, goes user pipe to set gradually external heat supply shut-off valve (9), externally supply heat regulating valve (8).
2. a split shaft heat supply Turbo-generator Set using method as claimed in claim 1, its method of operation is as follows: when Heating Period heat demand amount is larger, close the 3rd dynamic Control shut-off valve (6), modulating valve (7), base turbine (3) is stopped transport, top turbine back pressure operation, external for heat regulating valve (8), externally heat supply shut-off valve (9) unlatching, directly externally heat supply, by externally regulating thermoelectricity load for heat regulating valve (8), it is now pure back pressure turbine operating mode;
Reduce with heat load at non-heating period, 1 top turbine of stopping transport, generally when separate unit back pressure unit displacement exceedes thermal load demands 20%, start base turbine;
Now open the 3rd dynamic Control shut-off valve (6), modulating valve (7), base turbine (3) puts into operation, top turbine back pressure operation, external for heat regulating valve (8), externally heat supply shut-off valve (9) unlatching, by externally distributing pure condensate unit throttle flow and external heating load for heat regulating valve (8) and modulating valve (7) combine regulation, unit enters steam extraction and condensing formula operating mode;
If be multiple stage top turbine, by platform stoppage in transit top turbine; In like manner increasing requirement for meeting generated energy, starting base turbine, 1 base turbine configuration multiple stage top turbine runs;
When heat load is decreased to zero, close externally for heat regulating valve (8), externally heat supply shut-off valve (9), unit proceeds to straight condensing turbine operating mode.
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| CN107062350B (en) * | 2017-05-03 | 2019-01-15 | 国网山东省电力公司电力科学研究院 | A kind of thermal power plant unit renewable energy Depth peak regulating method |
| CN111706411A (en) * | 2020-07-22 | 2020-09-25 | 西安西热节能技术有限公司 | Thermodynamic system for transforming back pressure unit into extraction condensing unit and working method |
| CN113006895B (en) * | 2021-04-01 | 2022-02-15 | 济南达能动力技术有限责任公司 | Method and system for reducing station power consumption rate of power plant |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2869331Y (en) * | 2006-01-27 | 2007-02-14 | 沈同银 | Steam turbine condensing-back pressure two-purpose machine |
| CN201297185Y (en) * | 2008-11-26 | 2009-08-26 | 何坚忍 | New NCB biaxial heat-supply turbogenerator set |
| CN102392694A (en) * | 2011-11-28 | 2012-03-28 | 北京北重汽轮电机有限责任公司 | Heating cogeneration generator unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06317103A (en) * | 1993-05-07 | 1994-11-15 | Hitachi Ltd | Steam supply and power generating plant |
| JP5148535B2 (en) * | 2009-03-11 | 2013-02-20 | 株式会社東芝 | Steam turbine equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2869331Y (en) * | 2006-01-27 | 2007-02-14 | 沈同银 | Steam turbine condensing-back pressure two-purpose machine |
| CN201297185Y (en) * | 2008-11-26 | 2009-08-26 | 何坚忍 | New NCB biaxial heat-supply turbogenerator set |
| CN102392694A (en) * | 2011-11-28 | 2012-03-28 | 北京北重汽轮电机有限责任公司 | Heating cogeneration generator unit |
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Address after: 450007 Zhengzhou Zhongyuan Road, Henan, No. 212 Patentee after: China Electric Power Construction Group Henan electric survey and Design Institute Co., Ltd. Address before: 450007 Zhengzhou Zhongyuan Road, Central Plains, Henan, No. 212 Patentee before: Hennan Electric Power Survey & Design Institute |
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Granted publication date: 20160217 Termination date: 20191215 |