CN206035552U - Cogeneration vapour turbine system - Google Patents
Cogeneration vapour turbine system Download PDFInfo
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- CN206035552U CN206035552U CN201621039683.2U CN201621039683U CN206035552U CN 206035552 U CN206035552 U CN 206035552U CN 201621039683 U CN201621039683 U CN 201621039683U CN 206035552 U CN206035552 U CN 206035552U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Abstract
The utility model relates to a steam turbine technical field especially relates to a cogeneration vapour turbine system, including high pressure cylinder, intermediate pressure cylinder, low pressure jar and re -heater, the steam drain of high pressure cylinder is through the entry intercommunication of cold reheat steam pipeline with the re -heater, is equipped with the cold section of leading to the heat supply network branch road that draws gas on cold reheat steam pipeline, is equipped with cold section draw gas shut -off valve, cold section draw gas a quick closing valve governing valve and a cold section temperature and pressure reducing device in proper order from the upper reaches to low reaches on a way is drawn gas to cold section, the export of re -heater is equipped with reheat steam admission valves through the steam inlet intercommunication of hot reheat steam pipeline with the intermediate pressure cylinder on the steam inlet of intermediate pressure cylinder. The high regulated extraction steam of arranging of branch road realization but logical super -cooling section draws gas, the difference in temperature waste of comparing prior art is much little, has reduced the waste of the high -quality energy, makes actual extraction temperature and draws gas demand temperature phase -match, is suitable for the demand parameter value that draws gas and extensively, just need not to set up a rotary spacer or a cylinder valve and realize drawing gas in the steam turbine is through -flow, and the through -flow internal efficiency of unit is high.
Description
Technical field
This utility model is related to steam turbine technology field, more particularly to a kind of cogeneration turbine system.
Background technology
Steam turbine is one of crucial power-equipment in power plant construction, is to convert thermal energy into mechanical energy and then be converted into electricity
The energy conversion device of energy.By the high temperature of boiler generation, high steam, through steam turbine, heat energy is changed with pressure potential
Into the mechanical energy of steam turbine, the acting of turbine rotor output shaft, the mechanical energy is driven to pass to by turbine rotor output shaft
Electromotor, so as to convert mechanical energy into electric energy.
Gas-steam Combined Cycle meant gas turbine as preposition turbine, reclaims gas turbine with waste heat boiler
Exhaust heat, some grades of initial steams of output inject steam turbines, and steam expansion work exports electric energy in steam turbine.Combustion gas-
Steam Combined Cycle is the gas turbine with higher average endothermic temperature and with the steam turbine compared with harmonic(-)mean exothermic temperature
Combine, make the high-temperature tail gas of gas turbine enter waste heat boiler and produce steam, and make steam continue acting in steam turbine
Generate electricity, reach the purpose maximized favourable factors and minimized unfavourable ones, mutually make up, make the heat energy utilization level of whole combined cycle have bright compared with simple cycle
It is aobvious to improve.The net efficiency of combined cycle generation is up to 48%～62%.
At present the conventional combined cycle system double pressures widely used just like E level circulating power stations, without reheat system and F
Level circulating power station adopted three pressure, reheat system.The former generates electricity net efficiency 50% or so, and the latter's generating net efficiency exists
More than 58%.Additionally, also H level combined cycle system of the generating efficiency more than 60%.Thermoelectricity (cold) coproduction, refers in steamer
Extracting a part of steam at the through-flow suitable location within of machine out is used for factory steam, and original intention is to realize the rational gradient of the energy
Utilize.The combined cycle efficiency of cogeneration of heat and power can reach more than 70%.
But, existing combined heat and power blood circulation comes with some shortcomings.With the main flow F level fuel gas-steam of existing market
As a example by combined cycle thermoelectric jointly-supplying technology, the F level gas Combined turbine cycle groups of two sets of one-to-one type configurations will go up in steam power plant,
Steam demand of drawing gas is 1.8MPa, and 265 DEG C, quantity of steam is specified 150t/h, maximum 210t/h, extremely maximum 280t/h.According to
Traditional rotating barrier draws gas technology, in the through-flow pressure matched with demand pressure parameter (1.8MPa) of drawing gas of the intermediate pressure cylinder of steam turbine
Before power level, place arranges a rotating barrier or seat cylinder valve to realize adjusting the pressure for extracting steam, but the through-flow vapor (steam) temperature at this is
460 DEG C or so, with (265 DEG C) mismatches of the demand temperature parameter that draws gas, there is a problem of that the temperature difference is wasted larger, so as to inevitable
There is the phenomenon of high-quality energy waste in ground.Also, for the different demand parameters that draws gas, need to adjust rotating barrier or seat cylinder
Position of the valve in Steam Turbine Through IP Admission passage, causes steam turbine narrow to the scope of application of the demand parameter that draws gas.Additionally, traditional
The rotating barrier technology of drawing gas destroy the through-flow seriality of original Steam Turbine Through IP Admission, there is the through-flow internal efficiency of unit low
Problem.
Utility model content
The technical problems to be solved in the utility model be to provide a kind of actual extraction temperature match with the demand temperature of drawing gas,
The high cogeneration turbine system of internal efficiency that is suitable for that demand parameter scope of drawing gas is wide, unit is through-flow, to overcome prior art
Drawbacks described above.
In order to solve above-mentioned technical problem, this utility model is adopted the following technical scheme that：A kind of cogeneration turbine system
System, including high pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder and reheater, the steam drain of high pressure cylinder passes through cold reheaing steam pipe and reheater
Entrance connection, the cold section of branch road that draws gas for leading to heat supply network is provided with cold reheaing steam pipe, on the cold section of branch road that draws gas on
Swim to downstream and be sequentially provided with the cold section of shut-off valve that draws gas, cold section of draw gas quick closing valve regulating valve and cold section of reducing-and-cooling plant；Reheater
Outlet is connected with the air intake of intermediate pressure cylinder by hot reheat steam line, is provided with reheated steam and enters vapour on the air intake of intermediate pressure cylinder
Valve group.
Preferably, hot arc is communicated between hot reheat steam line and cold section of reducing-and-cooling plant to draw gas branch road, in heat
The section branch road that draws gas is provided with hot arc and draws gas quick closing valve regulating valve.
Preferably, draw gas branch road in the draws gas hot arc that be communicated between branch road of hot reheat steam line and cold section, and hot arc is taken out
Vapour branch road is connected with the cold section of branch road that draws gas in the downstream of cold section of reducing-and-cooling plant；Draw gas on branch road from upstream under hot arc is stated
Trip is sequentially provided with hot arc and draws gas quick closing valve regulating valve and hot arc reducing-and-cooling plant.
Preferably, hot arc is provided with hot arc draws gas branch road to draw gas shut-off valve, the hot arc shut-off valve that draws gas draws gas positioned at hot arc
The upstream of quick closing valve regulating valve.
Preferably, reheated steam inlet valve group includes reheating main steam valve and reheat control valve.
Preferably, reheat control valve includes the first reheat control valve and the second reheat control valve, the second reheat control valve with
First reheat control valve is in parallel.
Preferably, the air intake of high pressure cylinder is connected with High Pressure Steam Host Piping, on the air intake of high pressure cylinder is provided with high pressure
Main steam inlet valve group.
Preferably, high pressure turbine by is communicated between High Pressure Steam Host Piping and cold reheaing steam pipe, in high pressure turbine by
It is provided with high pressure bypass valve.
Preferably, high exhaust check valve and high row's shut-off valve are provided with cold reheaing steam pipe, high row's shut-off valve is located at cold
Section draw gas branch road upstream and positioned at high exhaust check valve downstream.
Preferably, low pressure gas filling pipeline is connected with the air intake of low pressure (LP) cylinder including condenser also, in low pressure gas filling pipeline
The low voltage bypass connected with condenser is provided with, low voltage bypass valve is provided with low voltage bypass.
Preferably, the intermediate pressure by-pass connected with condenser is provided with hot reheat steam line, is provided with intermediate pressure by-pass
Intermediate pressure by-pass valve.
Compared with prior art, this utility model has significant progressive：The logical super cooled sect branch road that draws gas realizes that high row draws gas,
When without heat demand, cold section of quick closing valve regulating valve closing of drawing gas, cold section of shut-off valve closing of drawing gas, reheated steam inlet valve group are complete
Open, turbine system is in single condition of supplying power, with existing combined heat and power blood circulation inside without supplying thermal condition tubine
The restriction loss that rotating barrier or seat cylinder valve in through-flow middle intermediate pressure cylinder is caused still is present to be compared, the effect that generates electricity of the present utility model
Rate is significantly improved.When there is heat demand, logical super cooled sect draws gas the cooperating of quick closing valve regulating valve and reheated steam inlet valve group
Adjustable steam extraction is realized, with wider applicable demand parameter scope of drawing gas；Also, high due to high pressure cylinder arranges steam (i.e.
Cold reheated steam) temperature Steam Turbine Through IP Admission in prior art be much smaller than realized that adjustment is drawn gas the temperature of place's steam, therefore,
This utility model is compared the temperature difference of prior art and wastes much smaller, so that high-quality energy waste phenomenon is significantly changed
It is kind.Additionally, this utility model is realized drawing gas without the need in the through-flow interior setting rotating barrier of steam turbine or seat cylinder valve so that steam turbine
The internal efficiency of extraction turbine that is equipped with apparently higher than under traditional mode of through-flow internal efficiency.
Description of the drawings
Fig. 1 is a kind of structural representation of the cogeneration turbine system of this utility model embodiment.
Fig. 2 is another kind of structural representation of the cogeneration turbine system of this utility model embodiment.
In figure：
HP, high pressure cylinder IP, intermediate pressure cylinder LP, low pressure (LP) cylinder
2nd, reheater 3, heat supply network 4, condenser
5th, cold section of reducing-and-cooling plant 6, high pressure main steam inlet valve group 6a, high pressure main stop valve
6b, septum valve 7, reheated steam inlet valve group 7a, reheating main steam valve
7b, the first reheat control valve 7c, the second reheat control valve 8, low pressure filling valve group
8a, low pressure stop valve 8b, low pressure modulating valve 9, high exhaust check valve
10th, cold section of quick closing valve regulating valve 11, hot arc of drawing gas is drawn gas quick closing valve regulating valve 12, high pressure bypass valve
13rd, the first spray water control valve 14, intermediate pressure by-pass valve 15, the second spray water control valve
16th, low voltage bypass valve 17, the 3rd spray water control valve 18, high row's ventilation valve
19th, cold section of shut-off valve 20, hot arc that draws gas draws gas shut-off valve 21, high row's shut-off valve
22nd, hot arc reducing-and-cooling plant
100th, cold reheaing steam pipe 101, the cold section of branch road 102, air pipeline that draws gas
200th, hot reheat steam line 201, hot arc draws gas branch road 202, intermediate pressure by-pass
300th, High Pressure Steam Host Piping 301, high pressure turbine by 400, low pressure gas filling pipeline
401st, low voltage bypass 500, the first water pipeline 600, the second water pipeline
700th, the 3rd water pipeline
Specific embodiment
Below in conjunction with the accompanying drawings specific embodiment of the present utility model is described in further detail.These embodiments are only
For illustrating this utility model, and it is not limitation of the utility model.
In description of the present utility model, it should be noted that term " on ", D score, "front", "rear", "left", "right",
The orientation or position relationship of the instruction such as " vertical ", " level ", " top ", " bottom " " interior ", " outward " be based on orientation shown in the drawings or
Position relationship, is for only for ease of description this utility model and simplifies description, rather than indicate or imply device or the unit of indication
Part must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance.
As depicted in figs. 1 and 2, a kind of embodiment of cogeneration turbine system of the present utility model.As shown in figure 1,
The cogeneration turbine system of the present embodiment includes high pressure cylinder HP, intermediate pressure cylinder IP, low pressure (LP) cylinder LP, reheater 2, condenser 4, cold
Reheaing steam pipe 100, hot reheat steam line 200, High Pressure Steam Host Piping 300 and low pressure gas filling pipeline 400.In this enforcement
In example, high pressure cylinder HP, intermediate pressure cylinder IP and low pressure (LP) cylinder LP can individually divide cylinder, intermediate pressure cylinder IP and low pressure (LP) cylinder LP to close using high pressure cylinder HP
The structure of cylinder, it would however also be possible to employ high pressure cylinder HP and intermediate pressure cylinder IP close cylinder, low pressure (LP) cylinder LP individually divide cylinder structure or high pressure cylinder HP,
Intermediate pressure cylinder IP and low pressure (LP) cylinder LP all individually divides the structure of cylinder.The cogeneration turbine system especially suitable three of the present embodiment
Pressure, reheating combined cycle thermoelectric co-feeding system, below by taking three pressures, reheating combined cycle thermoelectric co-feeding system as an example.In three pressures, again
In heat integration circulating thermoelectric co-feeding system, the steam produced in waste heat boiler includes three strands：High pressure main steam, reheat heat steam and
Low-pressure steam, each leads in high pressure cylinder HP, intermediate pressure cylinder IP and low pressure (LP) cylinder LP.Reheater 2 is cold for what is discharged to high pressure cylinder HP
The gaseous mixture of the middle pressure steam in reheated steam and waste heat boiler is reheated and is produced reheat heat steam.
Specifically, in the present embodiment, the air intake of high pressure cylinder HP and High Pressure Steam Host Piping 300 with connect, by high pressure
Main steam line 300 is passed through high pressure main steam into high pressure cylinder HP.High pressure main steam is provided with the air intake of high pressure cylinder HP to enter
Steam valve group 6, for controlling and adjusting the throttle flow of high pressure main steam.High pressure main steam inlet valve group 6 includes high pressure main stop valve 6a
Connect with septum valve 6b, high pressure main stop valve 6a and septum valve 6b.The steam drain of high pressure cylinder HP is by cold reheated steam
Pipeline 100 is connected with the entrance of reheater 2, high row's steam (i.e. cold reheated steam) cold reheating of Jing that high pressure cylinder HP steam drains are discharged
Jet chimney 100 is reheated in being passed through reheater 2.High exhaust check valve 9 is provided with cold reheaing steam pipe 100, is used for
Prevent cold reheated steam from flowing backwards in high pressure cylinder HP.
The outlet of reheater 2 is connected with the air intake of intermediate pressure cylinder IP by hot reheat steam line 200, is produced in reheater 2
Raw reheat heat steam Jing hot reheat steam lines 200 are passed through in intermediate pressure cylinder IP.Reheating is provided with the air intake of intermediate pressure cylinder IP
Steam inlet valve group 7, for controlling and adjusting the throttle flow of reheat heat steam.Reheated steam inlet valve group 7 includes the main vapour of reheating
Valve 7a and the first reheat control valve 7b, reheating main steam valve 7a and the first reheat control valve 7b series connection.
Low pressure gas filling pipeline 400 is connected with the air intake of low pressure (LP) cylinder LP, from low pressure gas filling pipeline 400 to low pressure (LP) cylinder LP in
It is passed through low-pressure steam.Low pressure filling valve group 8 is provided with the air intake of low pressure (LP) cylinder LP, for controlling and adjusting entering for low-pressure steam
Vapour amount.Low pressure filling valve group 8 includes that low pressure stop valve 8a and low pressure modulating valve 8b, low pressure stop valve 8a and low pressure modulating valve 8b go here and there
Connection.Preferably, on low pressure gas filling pipeline 400, the upstream of low pressure filling valve group 8 can also arrange a low pressure filling and adjust valve group
(not shown), in big flow, high row draws gas under operating mode, and low pressure filling adjusts the regulating valve in valve group and can control low pressure benefit
The pressure in front of the door of steam valve group 8.
In the present embodiment, the cold section of branch road 101 that draws gas for leading to heat supply network 3 is provided with cold reheaing steam pipe 100, for taking out
Take the cold reheated steam in part in cold reheaing steam pipe 100, and the cold reheated steam for extracting is passed through in heat supply network 3 thinks heat supply network
3 provide heat.On branch road 101 draw gas at cold section from upstream to downstream be sequentially provided with the cold section of shut-off valve 19 that draws gas, cold section draw gas it is fast
Close regulating valve 10 and cold section of reducing-and-cooling plant 5.
Wherein, the cold section of cold reheating for drawing gas quick closing valve regulating valve 10 for controlling and adjusting the cold section of extraction of branch road 101 of drawing gas is steamed
The flow of vapour, the first reheat control valve 7b that logical super cooled sect draws gas in quick closing valve regulating valve 10 and reheated steam inlet valve group 7 are mutual
Coordinate, the cold reheated steam assignment of traffic in can draw gas to cold section branch road 101 and cold reheaing steam pipe 100 is adjusted and controls
System, realizes adjustable steam extraction.
Cold section of reducing-and-cooling plant 5 carries out pressure and temperature reducing for the cold reheated steam extracted in the branch road 101 that draws gas to cold section
Process, to obtain the steam that temperature and pressure are matched with the demand parameter that draws gas.The cold section of branch road 101 that draws gas is connected with heat supply network 3
It is logical, the steam Jing after cold section of reducing-and-cooling plant 5 is processed can be sent into heat supply network 3, realize heat supply.
Under supplying thermal condition, the cold section of shut-off valve 19 that draws gas is in normally open, cold section of 101 normal work of branch road of drawing gas.This
If when heat supply network 3 break down, can pass through to close the circulation status that cold section of shut-off valve 19 that draws gas cut off the cold section of branch road 101 that draws gas, break
The connection of cold reheaing steam pipe 100 and heat supply network 3 is opened, so as to avoid causing because 3 fault impact turbine system of heat supply network runs
Compressor emergency shutdown, plays a protective role to set grid-connection safe and stable operation.Under non-supplying thermal condition, due to the cold section of quick closing valve tune that draws gas
Section valve 10 there may be and be not closed completely close problem and easily produce cold reheated steam leakage, now by closing cold section of pass of drawing gas
Disconnected valve 19, ensure that and cut out tightly the cold section of branch road 101 that draws gas, it is to avoid cold reheated steam leakage occurs and wastes.
The logical super cooled sect of the cogeneration turbine system of the present embodiment branch road 101 that draws gas realizes that high row draws gas, without heat supply
During demand, cold section draw gas quick closing valve regulating valve 10 and cold section of shut-off valve 19 that draws gas close, 7 standard-sized sheet of reheated steam inlet valve group, steamer
Machine system in single condition of supplying power, with existing combined heat and power blood circulation inside without supplying thermal condition tubine it is through-flow in
The restriction loss that rotating barrier or seat cylinder valve in cylinder pressure is caused still is present to be compared, and the generating efficiency of the present embodiment is substantially carried
It is high.When there is heat demand, logical super cooled sect draws gas the first thermal conditioning again in quick closing valve regulating valve 10 and reheated steam inlet valve group 7
Cooperating for valve 7b realizes adjustable steam extraction, with wider applicable demand parameter scope of drawing gas；Also, due to high pressure cylinder
During the temperature of high row's steam of HP to be much smaller than prior art, Steam Turbine Through IP Admission is realized adjusting the temperature of the place's steam that draws gas, because
This, the present embodiment is compared the temperature difference of prior art and wastes much smaller, so that high-quality energy waste phenomenon is significantly changed
It is kind.Additionally, the present embodiment is realized drawing gas without the need in the through-flow interior setting rotating barrier of steam turbine or seat cylinder valve so that steam turbine
The internal efficiency of the extraction turbine that through-flow internal efficiency is equipped with apparently higher than under traditional mode.
Further, in the present embodiment, as shown in figure 1, in hot reheat steam line 200 and cold section of reducing-and-cooling plant 5
Between be communicated with hot arc and draw gas branch road 201, hot arc draws gas branch road 201 positioned at the upstream of reheated steam inlet valve group 7.Hot arc draws gas
Branch road 201 is used to extract the part reheat heat steam in hot reheat steam line 200, and the reheat heat steam for extracting is sent into cold
The cold reheated steam that the branch road 101 that drawn gas with cold section in section reducing-and-cooling plant 5 is extracted mixes, and can increase total extraction flow simultaneously
The temperature of the cold reheated steam being lifted in cold section of reducing-and-cooling plant 5, it is to avoid the flow and temperature of the cold reheated steam of extraction
Spend relatively low and demand of actually drawing gas can not be met so that flow and temperature and the actual demand of the steam of extraction matches.Certainly,
As shown in Fig. 2 the hot arc of the present embodiment draws gas, branch road 201 can also be arranged on hot reheat steam line 200 and draw gas with cold section
Between road 101, and the hot arc branch road 201 that draws gas is connected with the cold section of branch road 101 that draws gas in the downstream of cold section of reducing-and-cooling plant 5.
Hot arc draws gas and is sequentially provided with hot arc from upstream to downstream on branch road 201 and draws gas quick closing valve regulating valve 11 and hot arc reducing-and-cooling plant
22.Steam Jing after cold section of 5 pressure and temperature reducing of reducing-and-cooling plant and the steam Jing after 22 pressure and temperature reducing of hot arc reducing-and-cooling plant
3 heat supply of heat supply network is sent into after mixing.
The present embodiment is provided with hot arc on hot arc draws gas branch road 201 and draws gas quick closing valve regulating valve 11, for controlling and adjusting heat
Section draw gas the extraction of branch road 201 reheat heat steam flow, drawn gas quick closing valve regulating valve 11 and reheated steam inlet valve by hot arc
The first reheat control valve 7b's in group 7 cooperates, and hot arc can be drawn gas in branch road 201 and hot reheat steam line 200
The distribution of reheat heat steam flow is adjusted and controls, and realizes adjustable steam extraction.Thus, drawing gas branch road 201 by hot arc can be right
The amount of drawing gas of the cold section of branch road 101 that draws gas is supplemented or is adjusted, and the cold reheated steam extracted in the branch road 101 that draws gas to cold section
Temperature is adjusted.On the one hand can lead to that cold section of quick closing valve regulating valve 10, hot arc of drawing gas draws gas quick closing valve regulating valve 11 and reheated steam is entered
Cooperating for steam valve group 7, increases the amount of drawing gas, and improves the heat capacity of turbine system；On the other hand, even if in high pressure cylinder HP
The temperature of high row's steam can not meet reality less than the demand temperature parameter that actually draws gas, or the amount of drawing gas of the cold section of branch road 101 that draws gas
Border draw gas demand when, the supplement of the branch road 201 that drawn gas by hot arc realizes that cold reheated steam is taken out with reheat heat steam heat supply
Vapour, it is also possible to ensure that the temperature and flow of the steam for sending into heat supply network 3 disclosure satisfy that actual demand.
Preferably, the present embodiment is additionally provided with hot arc on hot arc draws gas branch road 201 and draws gas shut-off valve 20, and hot arc draws gas shut-off
Valve 20 draws gas positioned at hot arc the upstream of quick closing valve regulating valve 11.When hot arc draw gas branch road 201 also assist in heat supply when, draw gas with cold section
Cold section on road 101 draws gas shut-off valve 19 in the same manner, and hot arc draws gas shut-off valve 20 in normally open, and hot arc draws gas branch road 201
Normal work.If now heat supply network 3 breaks down, hot arc can be cut off draw gas branch road 201 by closing the hot arc shut-off valve 20 that draws gas
Circulation status, disconnect the connection of hot reheat steam line 200 and heat supply network 3, so as to avoid because of 3 fault impact turbine system of heat supply network
Run and cause compressor emergency shutdown, set grid-connection safe and stable operation is played a protective role.Under non-supplying thermal condition, due to hot arc
Quick closing valve regulating valve 11 of drawing gas there may be and be not closed completely close problem and easily produce the leakage of reheat heat steam, now by closing
Hot arc draws gas shut-off valve 20, ensure that and closes tightly the hot arc branch road 201 that draws gas, it is to avoid reheat heat steam leakage wave occurs
Take.
Further, in the present embodiment, height is communicated between High Pressure Steam Host Piping 300 and cold reheaing steam pipe 100
Pressure bypass 301, high pressure turbine by 301 is located at the upstream of high pressure main steam inlet valve group 6.It is provided with by high pressure on high pressure turbine by 301
Road valve 12, high pressure bypass valve 12 are connected with the first water pipeline 500, and the first water pipeline 500 is provided with the first spray water control valve
13。
It is provided with intermediate pressure by-pass 202 on hot reheat steam line 200, intermediate pressure by-pass 202 draws gas branch road 201 positioned at hot arc
Upstream, intermediate pressure by-pass 202 are connected with condenser 4.Be provided with intermediate pressure by-pass valve 14 on intermediate pressure by-pass 202, intermediate pressure by-pass valve 14 with
Second water pipeline 600 is connected, and the second water pipeline 600 is provided with the second spray water control valve 15.
Low voltage bypass 401 is provided with low pressure gas filling pipeline 400, and low voltage bypass 401 is located at the upper of low pressure filling valve group 8
Trip, low voltage bypass 401 are connected with condenser 4.Low voltage bypass valve 16, low voltage bypass valve 16 and are provided with low voltage bypass 401
Three water pipelines 700 are connected, and the 3rd water pipeline 700 is provided with the 3rd spray water control valve 17.
Additionally, air pipeline 102 is provided with cold reheaing steam pipe 100, and air pipeline 102 is located at high exhaust check valve
9 upstream, air pipeline 102 are connected with condenser 4, and high row's ventilation valve 18 is provided with air pipeline 102.
Thus, the cogeneration turbine system of the present embodiment enters one in steam turbine failure or in the heat demand of heat supply network 3
When step is increased, heat supply can be still realized, steam turbine can be cut off, realize steam turbine fault condition or full cut condition heat supply,
So as to realize the maximization of heat capacity.Now, gas turbine is normally run with waste heat boiler, the main steaming of high pressure of turbine system
Vapour inlet valve group 6, reheated steam inlet valve group 7,9 Close All of low pressure filling valve group 8 and high exhaust check valve.High pressure main steam
Into after High Pressure Steam Host Piping 300, can enter in high pressure turbine by 301, Jing high pressure bypass valves 12 and the first water spray are adjusted
During cold reheaing steam pipe 100 is passed through after 13 spray cooling of valve and it is divided into two-way：Wherein all the way into the cold section of branch road 101 that draws gas
In, 3 heat supply of heat supply network is sent into Jing after the cold section of shut-off valve 19 that draws gas, cold section of draw gas quick closing valve regulating valve 10 and cold section of reducing-and-cooling plant 5；
The cold reheaing steam pipe 100 of another Lu Zejing is entered in reheater 2, and the outlet from reheater 2 is passed through hot reheat steam line
In 200, draw gas branch road 201 subsequently into hot arc, the Jing hot arcs shut-off valve 20, hot arc that draws gas draws gas quick closing valve regulating valve 11 into cold section
Mix in reducing-and-cooling plant 5 and with high pressure main steam therein, then send into 3 heat supply of heat supply network in the lump.It is low in waste heat boiler
Pressure steam can then send to the relatively low heat supply network heat supply of demand pressure parameter of drawing gas, it is also possible to which Jing low voltage bypasses 401 send into condenser 4
In.
Further, the present embodiment is additionally provided with high row's shut-off valve 21, high row's shut-off valve 21 on cold reheaing steam pipe 100
Draw gas in cold section branch road 101 upstream and be located at high exhaust check valve 9 downstream.In non-faulting operating mode heat supply, high row's shut-off valve
21 are shown in a fully open operation.In fault condition heat supply, high row's shut-off valve 21 is closed, can prevent from being not closed completely because of high exhaust check valve 9
It is close and produce steam leakage, it is to avoid high pressure main steam leaks into high pressure cylinder by 100 Jing high exhaust check valves 9 of cold reheaing steam pipe
In HP.
To sum up, the cogeneration turbine system of the present embodiment can be realized that the following four amount of drawing gas is incremented by successively and draw gas
Operating mode, to meet the demand of the different amounts of drawing gas：
(1) when the amount of the drawing gas very little of 3 demand of heat supply network, only lead to super cooled sect quick closing valve regulating valve 10 of drawing gas and be capable of achieving the net that reduces phlegm and internal heat
3 extraction flow is adjusted.Now, hot arc draws gas shut-off valve 20 and hot arc quick closing valve regulating valve 11 of drawing gas is closed, and reheated steam enters vapour
7 standard-sized sheet of valve group, cold section is drawn gas shut-off valve 19 and cold section of quick closing valve regulating valve 10 of drawing gas is opened.
(2) the first reheat control valve of reheated steam inlet valve group 7 can when 3 amount of drawing gas demand of heat supply network increases, be passed through
7b coordinates regulation with cold section of quick closing valve regulating valve 10 of drawing gas, and realizes the assignment of traffic of cold reheated steam.Cold reheated steam maximum is drawn gas
Amount is limited by the injection flow rate and steam turbine steam inlet condition of boiler, is also required to sometimes consider boiler reheater minimum cooling flow limit
System.
(3) when 3 amount of drawing gas of heat supply network further increases when maximum capacity (exceed cold draw gas again), hot arc can be opened and is taken out
Vapour shut-off valve 20 and hot arc draw gas quick closing valve regulating valve 11, and adjust hot arc and draw gas the aperture of quick closing valve regulating valve 11, increase all the way
Reheat heat steam enters cold section of reducing-and-cooling plant 5, realizes mixing heat supply, so as to further lift the heat capacity of unit.This
When, the quantity of steam into Steam Turbine Through IP Admission IP will tail off, as the exhaust stage blade of steam turbine needs minimum cooling flow, because
This increases hot arc and draws gas after branch road 201 draws gas, and the maximum heat capacity of unit is limited to minimum cooling flow.In the mixing heat supply
Under operating mode, in order to the regulation and control of the amount of drawing gas are better achieved, a valve aperture can be preferably set up less than the first reheat control valve
Second reheat control valve 7c of 7b valve apertures, and the second reheat control valve 7c is in parallel with the first reheat control valve 7b.Work as needs
The reheat heat steam flow of extraction is larger, the first reheat control valve 7b regulation performance can not be met when requiring well, can close
Close the first reheat control valve 7b, open the second reheat control valve 7c, drawn gas quick closing valve regulating valve 11 and the second thermal conditioning again by hot arc
Valve 7c cooperates adjustment extraction flow, so as to realize that big flow is evacuated.
(4) when the heat demand of heat supply network further increases, the full cut condition heat supply of steam turbine can be adopted, will steam turbine
Excision.At this point it is possible to close high pressure main steam inlet valve group 6, reheated steam inlet valve group 7 and low pressure filling valve group 8.High pressure
Main steam enters high pressure turbine by 301, and cold reheating is entered Jing after 13 spray cooling of high pressure bypass valve 12 and the first spray water control valve
Jet chimney 100 is simultaneously divided into two-way：Reheater 2 is entered all the way, is drawn gas in branch road 101 into cold section all the way.Heat in reheater 2
Steam Jing hot reheat steam lines 200 and hot arc draw gas branch road 201 again, finally also into cold section of reducing-and-cooling plant 5, so as to reality
Heat supply maximization is showed.Now, the meaning of the full cut condition of steam turbine is：The heat capacity of single unit disclosure satisfy that original two
The rated heating capacity demand of platform unit.The technical scheme can be relatively reliable guarantee heat supply network load need.
The above is only preferred implementation of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from this utility model know-why, some improvement and replacement can also be made, these change
Enter and replace also to should be regarded as protection domain of the present utility model.
Claims (11)
1. a kind of cogeneration turbine system, it is characterised in that including high pressure cylinder (HP), intermediate pressure cylinder (IP), low pressure (LP) cylinder (LP)
With reheater (2), the steam drain of the high pressure cylinder (HP) entered by cold reheaing steam pipe (100) and the reheater (2)
Mouth connection, is provided with the cold section of branch road that draws gas (101) for leading to heat supply network (3), on the cold reheaing steam pipe (100) described cold
Section to be drawn gas and be sequentially provided with the cold section of shut-off valve that draws gas (19), cold section of quick closing valve regulating valve of drawing gas from upstream to downstream on branch road (101)
And cold section of reducing-and-cooling plant (5) (10)；The outlet of the reheater (2) by hot reheat steam line (200) with it is described in
The air intake connection of cylinder pressure (IP), is provided with reheated steam inlet valve group (7) on the air intake of medium pressure cylinder (IP).
2. cogeneration turbine system according to claim 1, it is characterised in that in the hot reheat steam line
(200) it is communicated with hot arc to draw gas branch road (201) between the cold section of reducing-and-cooling plant (5), draws gas branch road in the hot arc
(201) it is provided with hot arc to draw gas quick closing valve regulating valve (11).
3. cogeneration turbine system according to claim 1, it is characterised in that in the hot reheat steam line
(200) it is communicated with hot arc to draw gas branch road (201) between the cold section of branch road that draws gas (101), and the hot arc draws gas branch road
(201) it is connected with the cold section of branch road that draws gas (101) in the downstream of the cold section of reducing-and-cooling plant (5)；Draw gas hot arc is stated
Hot arc is sequentially provided with from upstream to downstream on branch road (201) to draw gas quick closing valve regulating valve (11) and hot arc reducing-and-cooling plant (22).
4. the cogeneration turbine system according to Claims 2 or 3, it is characterised in that draw gas branch road in the hot arc
(201) it is provided with hot arc to draw gas shut-off valve (20), the hot arc shut-off valve (20) that draws gas draws gas quick closing valve regulation positioned at the hot arc
The upstream of valve (11).
5. cogeneration turbine system according to claim 1, it is characterised in that the reheated steam inlet valve group
(7) including reheating main steam valve (7a) and reheat control valve.
6. cogeneration turbine system according to claim 5, it is characterised in that the reheat control valve includes first
Reheat control valve (7b) and the second reheat control valve (7c), second reheat control valve (7c) and first reheat control valve
(7b) it is in parallel.
7. cogeneration turbine system according to claim 1, it is characterised in that the air intake of the high pressure cylinder (HP)
Connect with High Pressure Steam Host Piping (300), high pressure main steam inlet valve group is provided with the air intake of the high pressure cylinder (HP)
(6)。
8. cogeneration turbine system according to claim 7, it is characterised in that in the High Pressure Steam Host Piping
(300) high pressure turbine by (301) is communicated between the cold reheaing steam pipe (100), set on the high pressure turbine by (301)
There is high pressure bypass valve (12).
9. cogeneration turbine system according to claim 8, it is characterised in that in the cold reheaing steam pipe
(100) high exhaust check valve (9) and high row's shut-off valve (21) are provided with, high row's shut-off valve (21) is drawn gas positioned at described cold section and propped up
The upstream on road (101) the downstream positioned at the high exhaust check valve (9).
10. cogeneration turbine system according to claim 1, it is characterised in that also including condenser (4), described
Low pressure gas filling pipeline (400) is connected with the air intake of low pressure (LP) cylinder (LP), is provided with and institute on the low pressure gas filling pipeline (400)
The low voltage bypass (401) that condenser (4) is connected is stated, low voltage bypass valve (16) is provided with the low voltage bypass (401).
11. cogeneration turbine systems according to claim 10, it is characterised in that in the hot reheat steam line
(200) intermediate pressure by-pass (202) connected with the condenser (4) is provided with, is provided with by middle pressure in medium pressure bypass (202)
Road valve (14).
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| CN201621039683.2U CN206035552U (en) | 2016-09-06 | 2016-09-06 | Cogeneration vapour turbine system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621039683.2U CN206035552U (en) | 2016-09-06 | 2016-09-06 | Cogeneration vapour turbine system |
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| CN112502789B (en) * | 2020-09-30 | 2022-11-22 | 广西电网有限责任公司电力科学研究院 | Combined heat and power generation unit with reheater cold and hot sections for steam extraction in cooperation |
| CN112502788A (en) * | 2020-09-30 | 2021-03-16 | 广西电网有限责任公司电力科学研究院 | Control method of combined heat and power generation unit based on reheater cold and hot section cooperative steam extraction |
| CN114658497A (en) * | 2022-03-01 | 2022-06-24 | 华电电力科学研究院有限公司 | Switching front-end control system and control method for steam extraction system of double-extraction back steam turbine |
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