CN206267893U - Cogeneration turbine - Google Patents
Cogeneration turbine Download PDFInfo
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- CN206267893U CN206267893U CN201621200030.8U CN201621200030U CN206267893U CN 206267893 U CN206267893 U CN 206267893U CN 201621200030 U CN201621200030 U CN 201621200030U CN 206267893 U CN206267893 U CN 206267893U
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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 is related to main steam turbine technical field, more particularly to a kind of cogeneration turbine, including is sequentially connected and the high pressure cylinder of single shaft arrangement, intermediate pressure cylinder, the first low pressure (LP) cylinder and the second low pressure (LP) cylinder, and the amount of capacity of the first low pressure (LP) cylinder and the second low pressure (LP) cylinder is unequal；The steam drain of intermediate pressure cylinder is respectively communicated with by mesolow connecting pipe with the air intake of the first low pressure (LP) cylinder and the second low pressure (LP) cylinder, control valve group is provided with mesolow connecting pipe between intermediate pressure cylinder and the second low pressure (LP) cylinder, first clutch is provided between the armature spindle of the first low pressure (LP) cylinder and the second low pressure (LP) cylinder, the steam drain and/or intermediate pressure cylinder of high pressure cylinder are connected with the steam bleeding system for leading to heat supply network.Can be according to the change of demand of drawing gas, adjustment steam turbine participates in the number of the low pressure (LP) cylinder of operation, the problem of unit efficiency step-down, improves the operational efficiency of unit as far as possible caused by overcoming the turbine low pressure cylinder throttle flow off-design point for changing greatly generation because of thermic load of cogeneration turbine generally existing excessive.
Description
Technical field
The utility model is related to steam turbine technology field, more particularly to a kind of cogeneration turbine.
Background technology
Turbo-generator Set be it is a kind of convert thermal energy into mechanical energy and then be converted into the energy conversion device of electric energy, be electricity
One of crucial power-equipment stood in building.High temperature, the high steam produced by boiler, by steam turbine, by heat energy and pressure
Potential energy converting and energy, the mechanical energy as steam turbine drives the acting of turbine rotor output shaft, and the mechanical energy is exported by turbine rotor
Axle passes to generator, so as to convert mechanical energy into electric energy, therefore, steam turbine is commonly referred to as in " source of light " as source motivation.
Cogeneration Turbo-generator Set refers to again in steamer while steam turbine drives generator to power network conveying electric energy
Extract a part of steam at the suitable flow passing position of machine out and enter heat supply network heat supply, another part steam continues to be expanded in turbine runner
Work done drives the rotor of output shaft axle acting of steam turbine, and steam discharge the heat release of level pressure constant temperature and condenses into water, finally, then enters in condenser
Enter in the middle of thermodynamic cycle.
Although cogeneration turbine has heat utilization rate higher, it there is also drawback：When the amount of drawing gas is larger, vapour
The internal efficiency of turbine unit is changed greatly, and the optimal design operating mode only one of which of steam turbine, and general steam turbine is selected in design
Declared working condition is the design point (optimal design conditions) of unit, because the operating mode is generally performance guarantee operating mode.Work as unit operation
The efficiency of unit will drastically decline during off-design operating mode, and the internal efficiency that this results in the unit under specified supplying thermal condition is relatively low.
Utility model content
When the technical problems to be solved in the utility model is to provide a kind of unit operation off-design operating mode operational efficiency according to
Right cogeneration turbine higher, to overcome the drawbacks described above of prior art.
In order to solve the above-mentioned technical problem, the utility model is adopted the following technical scheme that：A kind of cogeneration turbine, bag
Include be sequentially connected and single shaft arrangement high pressure cylinder, intermediate pressure cylinder, the first low pressure (LP) cylinder and the second low pressure (LP) cylinder, the first low pressure (LP) cylinder and second low
The amount of capacity of cylinder pressure is unequal；The steam drain of intermediate pressure cylinder passes through mesolow connecting pipe and the first low pressure (LP) cylinder and the second low pressure (LP) cylinder
Air intake be respectively communicated with, control valve group is provided with the mesolow connecting pipe between intermediate pressure cylinder and the second low pressure (LP) cylinder,
First clutch, steam drain and/or the intermediate pressure cylinder connection of high pressure cylinder are provided between the armature spindle of one low pressure (LP) cylinder and the second low pressure (LP) cylinder
There is the steam bleeding system for leading to heat supply network.
Preferably, the steam drain of the first low pressure (LP) cylinder is connected with the first condenser, and the steam drain of the second low pressure (LP) cylinder and second coagulates
Vapour device is connected.
Preferably, the first low pressure (LP) cylinder and the second low pressure (LP) cylinder are double split flow structure or single current structure.
Preferably, one or two extraction opening is set on intermediate pressure cylinder, in through-flow one or two rotation of interior setting of intermediate pressure cylinder
Dividing plate or built-in regulating valve, extraction opening are connected with steam bleeding system.
Preferably, also including reheater, extraction line is provided with the steam drain of high pressure cylinder, extraction line passes through cold reheat pipe
Road is connected with the entrance of reheater, and the outlet of reheater is pressed into steam pipe road and is connected with the air intake of intermediate pressure cylinder in passing through, in middle pressure
Steam valve group is pressed into being provided with the air intake of cylinder；Steam bleeding system includes leading to the first cold of the first heat supply network on the extraction line
Section is drawn gas branch road, and the first quick closing valve regulating valve is provided with first cold section of branch road that draws gas.
Preferably, on first cold section of branch road that draws gas the downstream of the first quick closing valve regulating valve be provided with the first reducing-and-cooling plant or
Back pressure turbine.
Preferably, back pressure turbine is arranged or split axle arrangement with high pressure cylinder using single shaft.
Preferably, the first generator is provided with the rotor of output shaft axle of high pressure cylinder, the armature spindle of back pressure turbine passes through
Shaft coupling or the 3rd clutch are connected with the first generator.
Preferably, back pressure turbine is single current structure or double split flow structure.
Preferably, the secondary cooling zone for leading to the first heat supply network that steam bleeding system also includes on the extraction line draws gas branch road,
Secondary cooling zone draws gas branch road and first cold section of branch circuit parallel connection that draws gas, and is set successively from upstream to downstream on secondary cooling zone draws gas branch road
There are the second quick closing valve regulating valve and the second reducing-and-cooling plant.
Preferably, steam bleeding system also includes that the hot arc that steam pipe road and the second reducing-and-cooling plant are pressed into connection draws gas branch
Road, is provided with the 3rd quick closing valve regulating valve on hot arc draws gas branch road.
Preferably, steam bleeding system also includes being pressed into steam pipe road in connection and the draw gas hot arc of branch road of secondary cooling zone draws gas branch
Road, the hot arc branch road branch road that drawn gas with secondary cooling zone in the downstream of the second reducing-and-cooling plant that draws gas is connected, and is drawn gas branch road in hot arc
On be sequentially provided with the 3rd quick closing valve regulating valve and the 3rd reducing-and-cooling plant from upstream to downstream.
Preferably, the middle pressure towards the second heat supply network that steam bleeding system also includes at the intermediate pressure cylinder steam drain is drawn gas branch road,
It is middle to press the branch road that draws gas to be provided with the 4th quick closing valve regulating valve.
Preferably, it is provided with second clutch between the armature spindle of intermediate pressure cylinder and the first low pressure (LP) cylinder.
Compared with prior art, the utility model has significant progressive：By setting two unequal low pressure of capacity
Cylinder, according to the size of demand of drawing gas, by the second low pressure (LP) cylinder enter steam flow amount be designed as it is suitable with the specified heat supply amount of drawing gas, in volume
Determine under supplying thermal condition, by the second low pressure (LP) cylinder off-the-line, now can still maintain the air inflow and pure condensate work of the first low pressure (LP) cylinder
The throttle flow of condition quite, ensures that the first low pressure (LP) cylinder can maintain internal efficiency higher under operating mode of drawing gas.Thus, according to
The change of demand of drawing gas, adjustment steam turbine participates in the number of the low pressure (LP) cylinder of operation, overcomes cogeneration turbine and generally deposits
The turbine low pressure cylinder throttle flow off-design point for changing greatly generation because of thermic load it is excessive caused by unit efficiency become
Low problem, improves the operational efficiency of unit as much as possible.
Brief description of the drawings
Fig. 1 is the structural representation of the cogeneration turbine of the utility model embodiment one.
Fig. 2 is the structural representation of the cogeneration turbine of the utility model embodiment two.
Fig. 3 is that the back pressure turbine of the cogeneration turbine of the utility model embodiment two and high pressure cylinder use single shaft
The structural representation of arrangement.
In figure：
HP, high pressure cylinder IP, intermediate pressure cylinder LP, low pressure (LP) cylinder
LP1, the first low pressure (LP) cylinder LP2, the second low pressure (LP) cylinder 1, the first quick closing valve regulating valve
2nd, the second quick closing valve regulating valve 3, the 3rd quick closing valve regulating valve 4, the 4th quick closing valve regulating valve
5th, control valve group 6, back pressure turbine 7, the first generator
8th, safety valve 9, regulating valve 10, the first heat supply network
11st, the first reducing-and-cooling plant 12, the second reducing-and-cooling plant 13, the 3rd reducing-and-cooling plant
14th, the second heat supply network 15, reheater 16, the second generator
17th, high-pressure admission valve group 18, high exhaust check valve 19, in be pressed into steam valve group
20th, middle pressure non-return valve 21, the first condenser 22, the second condenser
23rd, first clutch 24, second clutch 25, the 3rd clutch
1.1st, high-pressure admission pipeline 1.2, extraction line 1.3, cold reheat pipe road
1.4th, 1.5, first cold section of the steam pipe road branch road 1.6, secondary cooling zone that draws gas is pressed into draw gas branch road
1.7th, draw gas branch road 1.8, mesolow connecting pipe 1.9, middle pressure of hot arc is drawn gas branch road
Specific embodiment
Specific embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings.These implementation methods are only
For illustrating the utility model, and it is not limitation of the utility model.
, it is necessary to illustrate in description of the present utility model, term " first ", " second " are only used for describing purpose, and
It is not intended that indicating or implying relative importance.Unless otherwise clearly defined and limited, term " installation ", " connected ", " company
Connect " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or it is integrally connected；It can be machine
Tool is connected, or electrically connected；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two units
Connection inside part.For the ordinary skill in the art, can as the case may be understand above-mentioned term in this reality
With the concrete meaning in new.
Embodiment one
As shown in figure 1, a kind of embodiment of cogeneration turbine of the present utility model.The cogeneration of the present embodiment one
Steam turbine includes high pressure cylinder HP, intermediate pressure cylinder IP, the first low pressure (LP) cylinder LP1, the second low pressure (LP) cylinder LP2 and reheater 15.Wherein, high pressure
Cylinder HP, intermediate pressure cylinder IP, the first low pressure (LP) cylinder LP1 and the second low pressure (LP) cylinder LP2 single shafts arrange and are sequentially connected that the rotor of high pressure cylinder HP is defeated
The first generator 7 is connected with shaft.High pressure cylinder HP and intermediate pressure cylinder IP can be using the structure of individually point cylinder, it would however also be possible to employ close
The structure of cylinder.First low pressure (LP) cylinder LP1 and the second low pressure (LP) cylinder LP2 can use double split flow structure, it is also possible to using single current knot
Structure, or it is double split flow, the structure that another is single current to use one of them.First low pressure (LP) cylinder LP1's and the second low pressure (LP) cylinder LP2
Amount of capacity is unequal, i.e. the exhaust stage blade of the first low pressure (LP) cylinder LP1 and the second low pressure (LP) cylinder LP2 is differed.In the first low pressure (LP) cylinder LP1
And second low pressure (LP) cylinder LP2 armature spindle between be provided with first clutch 23.Preferably, first clutch 23 is using with locking work(
The self-synchronizing clutch of energy, in order to manipulate, improves the degree of automation.
The air intake of high pressure cylinder HP is connected with high-pressure admission pipeline 1.1, from high-pressure admission pipeline 1.1 to being passed through in high pressure cylinder
High steam.High-pressure admission valve group 17 is provided with high-pressure admission pipeline 1.1, is passed through in high pressure cylinder HP for controlling and adjusting
High steam flow.
Extraction line 1.2 is provided with the steam drain of high pressure cylinder HP, extraction line 1.2 passes through cold reheat pipe road 1.3 and reheating
The entrance connection of device 15, is provided with high exhaust check valve 18 on extraction line 1.2, for preventing row's steam (i.e. cold reheated steam) high
Flow backwards into high pressure cylinder HP.
The outlet of reheater 15 is pressed into steam pipe road 1.4 and is connected with the air intake of intermediate pressure cylinder IP in passing through, intermediate pressure cylinder IP's
Steam valve group 19 is pressed into being provided with air intake, the throttle flow for controlling and adjusting middle pressure steam (i.e. reheat heat steam).
The steam drain of intermediate pressure cylinder IP is by the low pressure (LP) cylinder LP1's of mesolow connecting pipe 1.8 and first and the second low pressure (LP) cylinder LP2
Air intake is respectively communicated with, and control valve group is provided with the mesolow connecting pipe 1.8 between intermediate pressure cylinder IP and the second low pressure (LP) cylinder LP2
5。
The steam drain of the first low pressure (LP) cylinder LP1 is connected with the first condenser 21, and the steam drain of the second low pressure (LP) cylinder LP2 and second coagulates
Vapour device 22 is connected.Preferably, for energy-saving purpose, the first condenser 21 and the second condenser 22 using Double-casing,
The condenser of double-flow, double back pressure patterns.
The cogeneration turbine of the present embodiment one is additionally provided with the steam bleeding system for leading to heat supply network, for extracting steam turbine in
Some vapor is simultaneously sent to heat supply network heat supply.The steam bleeding system of the present embodiment one can be arranged at the steam drain of high pressure cylinder HP, to take out
Take row's steam high and be sent to heat supply network heat supply；Can also be set at the through-flow position matched with heat supply network demand parameter inside intermediate pressure cylinder IP
Extraction opening is put, or using the steam drain of intermediate pressure cylinder IP as extraction opening, steam bleeding system is connected with the extraction opening of intermediate pressure cylinder IP,
Heat supply network heat supply is sent to extract the steam in intermediate pressure cylinder IP；Can also be simultaneously in the steam drain of high pressure cylinder HP and taking out for intermediate pressure cylinder IP
A steam bleeding system is respectively provided with steam ports, and the steam of extraction is sent to different heat supply network heat supplies respectively.
Specifically, when extraction opening is arranged on intermediate pressure cylinder IP flow passing positions, can be by the through-flow interior settings of intermediate pressure cylinder IP
One or two rotating barrier or built-in regulating valve, realize one-level or two-stage adjustable steam extraction in intermediate pressure cylinder IP.
When steam bleeding system is arranged at the steam drain of high pressure cylinder HP, the steam bleeding system includes being located at extraction line 1.2
On first cold section that leads to the first heat supply network 10 branch road 1.5 that draws gas, draw gas branch road 1.5 at first cold section on be provided with the first quick closing valve tune
Section valve 1.The mutual cooperation that steam valve group 19 is pressed into in by the first quick closing valve regulating valve 1 is capable of achieving Stress control and height at row high
The assignment of traffic of pressure vapour, so as to realize adjustable steam extraction.
Preferably, the present embodiment one draw gas branch road 1.5 at first cold section on the first quick closing valve regulating valve 1 downstream set first
Reducing-and-cooling plant 11, in the branch road 1.5 that drawn gas to first cold section extract steam carry out pressure and temperature reducing treatment, with obtain with
The steam of the heat demand match parameters of the first heat supply network 10, meets the heat demand of the first heat supply network 10.According to actual heat supply
Need, can also be connected one or more subordinate's reducing-and-cooling plant in the downstream of the first reducing-and-cooling plant 11, first subtracts
After steam in warm decompressor 11 is through the further pressure and temperature reducing of subordinate's reducing-and-cooling plant, the heat supply network that pressure demand is lower can be removed
Heat supply.
Further, the steam bleeding system of the present embodiment one can also include on the extraction line 1.2 towards the first heat supply network
10 secondary cooling zone draws gas branch road 1.6, and the secondary cooling zone branch road 1.6 that draws gas is in parallel with first cold section of branch road 1.5 that draws gas, cold second
Section to be drawn gas and be sequentially provided with the second quick closing valve regulating valve 2 and the second reducing-and-cooling plant 12 from upstream to downstream on branch road 1.6.By
Two quick closing valve regulating valves 2 steam flow extracted in branch road 1.6 that can be drawn gas to secondary cooling zone is controlled and adjusts, by second
The steam extracted in branch road 1.6 that can be drawn gas to secondary cooling zone of reducing-and-cooling plant 12 carries out pressure and temperature reducing treatment, makes it with the
The heat demand of one heat supply network 10 matches.Thus, the branch road 1.5 that drawn gas at first cold section can not meet the heat supply need of the first heat supply network 10
When asking, branch road 1.6 can be drawn gas to the heat supply of the first heat supply network 10 from secondary cooling zone.
Further, the steam bleeding system of the present embodiment one can also include that be pressed into steam pipe road 1.4 in connecting takes out with secondary cooling zone
The hot arc of vapour branch road 1.6 draws gas branch road 1.7, and the hot arc branch road 1.7 that draws gas is cold with second in the downstream of the second reducing-and-cooling plant 12
The section branch road 1.6 that draws gas is connected, and the 3rd quick closing valve regulating valve 3 and the are sequentially provided with from upstream to downstream on hot arc draws gas branch road 1.7
Three reducing-and-cooling plants 13.Subtract through the steam after the pressure and temperature reducing of the second reducing-and-cooling plant 12 and through the 3rd reducing-and-cooling plant 13
The heat supply of the first heat supply network 10 is sent into after steam after temperature decompression.Certainly, hot arc draws gas during branch road 1.7 can also be connected to and is pressed into
Between the reducing-and-cooling plant 12 of steam pipe road 1.4 and second, and the 3rd quick closing valve regulating valve 3 is set on hot arc draws gas branch road 1.7.This
When hot arc draw gas branch road 1.7 and the secondary cooling zone branch road 1.6 that draws gas shares the second reducing-and-cooling plant 12, hot arc draws gas branch road 1.7
The reheat heat steam and secondary cooling zone of extraction draw gas branch road 1.6 extraction cold reheated steam at the second reducing-and-cooling plant 12 mix
The heat supply of the first heat supply network 10 is sent into after merging pressure and temperature reducing.The 3rd quick closing valve regulating valve 3 in the present embodiment one is used to adjust and control
Hot arc draws gas and the flow of steam is extracted in branch road 1.7, when heat demand increase, can open the 3rd quick closing valve regulating valve 3, unlatching
Hot arc draws gas branch road 1.7, is pressed into the part reheat heat steam in steam pipe road 1.4 in extraction, and the reheat heat steam that will be extracted with
Secondary cooling zone draw gas branch road 1.6 extraction cold reheated steam mixing after send into the heat supply of the first heat supply network 10, to increase total stream that draws gas
Amount, meets the heat demand of the first heat supply network 10.
Further, the steam bleeding system of the present embodiment one can also include hot towards second at intermediate pressure cylinder IP steam drains
The middle pressure of net 14 is drawn gas branch road 1.9, and middle pressure to be drawn gas and be sequentially provided with middle pressure non-return valve 20 and the 4th from upstream to downstream on branch road 1.9
Quick closing valve regulating valve 4.The steam that middle pressure non-return valve 20 is used to preventing middle pressure from drawing gas in branch road 1.9 is blowed back into intermediate pressure cylinder IP, and the 4th
Quick closing valve regulating valve 4 presses the flow of extraction steam in the branch road 1.9 that draws gas in being used to adjust.
Preferably, second clutch 24 can be set between the armature spindle of intermediate pressure cylinder IP and the first low pressure (LP) cylinder LP1.When
When extraction flow in the heat demand of two heat supply networks 14 is larger, middle pressure is drawn gas branch road 1.9 is larger, second clutch 24 can be solved
Lock, and block the first low pressure (LP) cylinder LP1 and the second low pressure (LP) cylinder LP2 and enter vapour, make the first low pressure (LP) cylinder LP1's and the second low pressure (LP) cylinder LP2
The rotating speed reduction of rotor of output shaft axle, second clutch 24 is disengaged automatically, so as to realize the first low pressure (LP) cylinder LP1 and the second low pressure (LP) cylinder
The online off-the-line of LP2, it is possible thereby to play the work for saving minimum cooling flow in the first low pressure (LP) cylinder LP1 and the second low pressure (LP) cylinder LP2
With, put forward high pressure and draw gas the extraction flow of branch road 1.9, press extraction for heat supply to maximize in realization.
The first heat supply network 10 in the present embodiment one is industrial heat supply network, is taken out by first cold section of branch road 1.5, secondary cooling zone that draws gas
The draw gas mutual cooperation of branch road 1.7 of vapour branch road 1.6 and hot arc can meet the extraction steam for factories demand of the first heat supply network 10.Second heat
Net 14 is heating heat supply network, can be met the heating of the second heat supply network 14 and is drawn gas demand by the middle pressure branch road 1.9 that draws gas.Thus, this reality
Apply example one and branch road 1.7 is drawn gas and middle pressure is drawn gas branch by first cold section of branch road 1.5, secondary cooling zone that draws gas branch road 1.6, hot arc that draws gas
The steam bleeding system that road 1.9 is constituted, it is possible to achieve while be two different heat supply network heat supplies of heat demand, with good flexible
Property and adaptability.
The operation principle of the cogeneration turbine of the present embodiment one is：When steamer machine-heating load is smaller, i.e. heat supply network
When heat demand is smaller, the steam bleeding system amount of drawing gas is smaller, the first low pressure (LP) cylinder LP1 and the second low pressure (LP) cylinder LP2 on-line operations simultaneously,
First clutch 23 links together the rotor of output shaft axle of the second low pressure (LP) cylinder LP2 with the rotor of output shaft axle of the first low pressure (LP) cylinder LP1.
Now, unit possesses of a relatively high internal efficiency operation.When the thermic load of steam turbine becomes big, i.e., the heat demand of heat supply network becomes
Greatly, when the quantitative change of drawing gas of steam bleeding system is big, the throttle flow of the first low pressure (LP) cylinder LP1 and the second low pressure (LP) cylinder LP2 is reduced to rated steam inlet
During half of amount or so, first first clutch 23 is unlocked, be then shut off control valve group 5, the second low pressure (LP) cylinder LP2's of blocking enters
Vapour, then the rotating speed reduction of the rotor of output shaft axle of the second low pressure (LP) cylinder LP2, first clutch 23 is disengaged automatically, so as to realize that second is low
The online off-the-line of cylinder pressure LP2, can now stop the operation of the second condenser 22, with using electricity wisely.Now, the first low pressure (LP) cylinder
LP1 and the first condenser 21 maintain operation at rating, and whole unit runs under still maintaining efficiency higher.When
The thermic load of steam turbine diminishes again, the throttle flow of the first low pressure (LP) cylinder LP1 is dramatically increased again when, opens control valve group 5, starts second
Low pressure (LP) cylinder LP2 and the second condenser 22, realize that the synchronization of the second low pressure (LP) cylinder LP2 is generated electricity by way of merging two or more grid systems, it is grid-connected after by first clutch 23
Locking so that unit possesses and traditional unit identical running status.
Embodiment two
As shown in Fig. 2 embodiment two provides second embodiment of cogeneration turbine of the present utility model.Implement
Example two is essentially identical with embodiment one, and something in common is repeated no more, and difference is that the present embodiment two draws gas at first cold section
The downstream of the first quick closing valve regulating valve 1 sets back pressure turbine 6 on branch road 1.5, and embodiment one is instead of with back pressure turbine 6
In the first reducing-and-cooling plant 11.The steam drain of back pressure turbine 6 is connected by pipeline with the first heat supply network 10, in back pressure type
The pipeline that steam turbine 6 is connected with the first heat supply network 10 is provided with a safety valve 8 and a regulating valve 9.The back pressure of back pressure turbine 6 can
The heat demand pressure of the first heat supply network 10 is set to, the steaming matched with its demand parameter is provided so as to be embodied as the first heat supply network 10
Vapour, it is to avoid set multistage reducing-and-cooling plant in systems, simple structure can reduce energy loss, it is to avoid high-quality energy
Source wastes.
Back pressure turbine 6 in the present embodiment two can use single current structure, it would however also be possible to employ double split flow structure.Back pressure
Formula steam turbine 6 can be arranged using split axle as shown in Figure 2 with high pressure cylinder HP, generated electricity by high pressure cylinder HP the first generators 7 of drive；
The second generator 16 is driven to generate electricity by back pressure turbine 6, the second generator 16 is small generators.Back pressure turbine 6 and height
Cylinder pressure HP can also be provided with the first generator 7 using single shaft arrangement as shown in Figure 3 in the rotor of output shaft axle of high pressure cylinder HP,
The armature spindle of back pressure turbine 6 is connected with the rotating shaft of the first generator 7.The armature spindle of back pressure turbine 6 can be by connection
Axle device is rigidly connected with the first generator 7, it is also possible to is connected with the first generator 7 by the 3rd clutch 25, is shown in Fig. 3
The armature spindle of back pressure turbine 6 is connected by the 3rd clutch 25 with the first generator 7.Now it is not provided with the second generator
16, drive the first generator 7 to generate electricity jointly by high pressure cylinder HP and back pressure turbine 6.Preferably, as shown in figure 3, high pressure cylinder HP
With intermediate pressure cylinder IP using the structure for individually dividing cylinder, the first generator 7 is located in the rotor of output shaft axle of high pressure cylinder HP, the 3rd clutch
25 are located between the first generator 7 and the armature spindle of back pressure turbine 6.Certainly, high pressure cylinder HP and intermediate pressure cylinder IP can also be adopted
With close cylinder structure, now the first generator 7 then can both be located in the rotor of output shaft axle of high pressure cylinder HP, it is also possible to be located at middle pressure
In the rotor of output shaft axle of cylinder IP.Single shaft advantage of the arrangement with compact conformation, can also save a small generators, i.e., second in addition
Generator 16 can be saved.
In sum, cogeneration turbine of the present utility model is by setting two unequal low pressure (LP) cylinders of capacity, root
According to the size of demand of drawing gas, by the second low pressure (LP) cylinder LP2 enter steam flow amount be designed as it is suitable with the specified heat supply amount of drawing gas, specified
Under supplying thermal condition, can by the second low pressure (LP) cylinder LP2 off-the-lines, now can still maintain the air inflow of the first low pressure (LP) cylinder LP1 with it is pure
The throttle flow of solidifying operating mode quite, ensures that the first low pressure (LP) cylinder LP1 can maintain internal efficiency higher under operating mode of drawing gas.By
This, according to the change of demand of drawing gas, adjustment steam turbine participates in the number of the low pressure (LP) cylinder of operation, overcomes cogeneration turbine
Unit caused by the turbine low pressure cylinder throttle flow off-design point that generation is changed greatly because of thermic load of generally existing is excessive
The problem of efficiency step-down, improves the operational efficiency of unit as much as possible.
The above is only preferred embodiment of the present utility model, it is noted that for the ordinary skill people of the art
Member for, on the premise of the utility model know-why is not departed from, some improvement and replacement can also be made, these improve and
Replacement also should be regarded as protection domain of the present utility model.
Claims (14)
1. a kind of cogeneration turbine, it is characterised in that including be sequentially connected and single shaft arrangement high pressure cylinder (HP), intermediate pressure cylinder
(IP), the first low pressure (LP) cylinder (LP1) and the second low pressure (LP) cylinder (LP2), first low pressure (LP) cylinder (LP1) and the second low pressure (LP) cylinder (LP2)
Amount of capacity is unequal；The steam drain of medium pressure cylinder (IP) passes through mesolow connecting pipe (1.8) and first low pressure (LP) cylinder
(LP1) it is respectively communicated with the air intake of the second low pressure (LP) cylinder (LP2), in medium pressure cylinder (IP) and second low pressure (LP) cylinder (LP2)
Between mesolow connecting pipe (1.8) be provided with control valve group (5), in first low pressure (LP) cylinder (LP1) and the second low pressure (LP) cylinder
(LP2) first clutch (23), the steam drain and/or medium pressure cylinder (IP) of the high pressure cylinder (HP) are provided between armature spindle
It is connected with the steam bleeding system for leading to heat supply network.
2. cogeneration turbine according to claim 1, it is characterised in that the steam discharge of first low pressure (LP) cylinder (LP1)
Mouth is connected with the first condenser (21), and the steam drain of second low pressure (LP) cylinder (LP2) is connected with the second condenser (22).
3. cogeneration turbine according to claim 1, it is characterised in that first low pressure (LP) cylinder (LP1) and second
Low pressure (LP) cylinder (LP2) is double split flow structure or single current structure.
4. cogeneration turbine according to claim 1, it is characterised in that set on medium pressure cylinder (IP) one or
Two extraction openings, medium pressure cylinder (IP) it is through-flow it is interior set one or two rotating barrier or built-in regulating valve, it is described to take out
Steam ports is connected with the steam bleeding system.
5. cogeneration turbine according to claim 1, it is characterised in that also including reheater (15), the high pressure
Be provided with extraction line (1.2) at the steam drain of cylinder (HP), the extraction line (1.2) by cold reheat pipe road (1.3) with it is described
The entrance connection of reheater (15), the outlet of the reheater (15) is pressed into steam pipe road (1.4) and medium pressure cylinder in passing through
(IP) air intake connection, is pressed into steam valve group (19) in being provided with the air intake of medium pressure cylinder (IP)；
The steam bleeding system includes first cold section that leads to the first heat supply network (10) branch of drawing gas on the extraction line (1.2)
Road (1.5), is provided with the first quick closing valve regulating valve (1) on described first cold section of branch road that draws gas (1.5).
6. cogeneration turbine according to claim 5, it is characterised in that in described first cold section of branch road that draws gas
(1.5) downstream of the first quick closing valve regulating valve (1) is provided with the first reducing-and-cooling plant (11) or back pressure turbine (6) on.
7. cogeneration turbine according to claim 6, it is characterised in that the back pressure turbine (6) with it is described
High pressure cylinder (HP) is arranged or split axle arrangement using single shaft.
8. cogeneration turbine according to claim 7, it is characterised in that exported in the rotor of the high pressure cylinder (HP)
Axle is provided with the first generator (7), the armature spindle of the back pressure turbine (6) by shaft coupling or the 3rd clutch (25) with
First generator (7) is connected.
9. cogeneration turbine according to claim 6, it is characterised in that the back pressure turbine (6) is single current
Structure or double split flow structure.
10. cogeneration turbine according to claim 5, it is characterised in that the steam bleeding system also includes being located at institute
State the secondary cooling zone for leading to the first heat supply network (10) on extraction line (1.2) to draw gas branch road (1.6), the secondary cooling zone draws gas branch
Road (1.6) is in parallel with described first cold section of branch road that draws gas (1.5), on the secondary cooling zone draws gas branch road (1.6) from upstream to
Downstream is sequentially provided with the second quick closing valve regulating valve (2) and the second reducing-and-cooling plant (12).
11. cogeneration turbines according to claim 10, it is characterised in that the steam bleeding system also includes connection institute
Steam pipe road (1.4) and the hot arc of second reducing-and-cooling plant (12) are pressed into stating to draw gas branch road (1.7), are taken out in the hot arc
Vapour branch road (1.7) is provided with the 3rd quick closing valve regulating valve (3).
12. cogeneration turbines according to claim 10, it is characterised in that the steam bleeding system also includes connection institute
It is pressed into the draw gas hot arc of branch road (1.6) of steam pipe road (1.4) and the secondary cooling zone in stating to draw gas branch road (1.7), the hot arc is taken out
Vapour branch road (1.7) branch road (1.6) that drawn gas with the secondary cooling zone in the downstream of second reducing-and-cooling plant (12) is connected,
The hot arc to draw gas and be sequentially provided with the 3rd quick closing valve regulating valve (3) and the 3rd pressure and temperature reducing dress from upstream to downstream on branch road (1.7)
Put (13).
13. cogeneration turbines according to claim 5, it is characterised in that the steam bleeding system also includes being located at institute
State the middle pressure towards the second heat supply network (14) at intermediate pressure cylinder (IP) steam drain to draw gas branch road (1.9), medium pressure is drawn gas branch road
(1.9) it is provided with the 4th quick closing valve regulating valve (4).
14. cogeneration turbines according to claim 13, it is characterised in that in medium pressure cylinder (IP) and described
Second clutch (24) is provided between the armature spindle of one low pressure (LP) cylinder (LP1).
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| CN201621200030.8U CN206267893U (en) | 2016-11-07 | 2016-11-07 | Cogeneration turbine |
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| CN201621200030.8U CN206267893U (en) | 2016-11-07 | 2016-11-07 | Cogeneration turbine |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108005740A (en) * | 2017-10-20 | 2018-05-08 | 北京首钢股份有限公司 | A kind of co-generation unit |
| CN109736908A (en) * | 2019-01-31 | 2019-05-10 | 西安西热节能技术有限公司 | A kind of internal bypass turbine generator system and method applied to cogeneration units |
| CN109827218A (en) * | 2018-12-17 | 2019-05-31 | 上海电力学院 | A kind of the extraction for heat supply system and control method of thorough excision separate unit low pressure (LP) cylinder |
| CN110219710A (en) * | 2019-03-15 | 2019-09-10 | 华电电力科学研究院有限公司 | A kind of differential pressure power generating system and operation method |
| CN110454249A (en) * | 2019-09-04 | 2019-11-15 | 西安热工研究院有限公司 | A kind of double back pressure turbine low pressure (LP) cylinders zero are contributed heating system and method for adjustment |
| CN112833378A (en) * | 2020-12-28 | 2021-05-25 | 东方电气集团东方汽轮机有限公司 | Reheating system capable of improving heat supply capacity |
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2016
- 2016-11-07 CN CN201621200030.8U patent/CN206267893U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005740A (en) * | 2017-10-20 | 2018-05-08 | 北京首钢股份有限公司 | A kind of co-generation unit |
| CN109827218A (en) * | 2018-12-17 | 2019-05-31 | 上海电力学院 | A kind of the extraction for heat supply system and control method of thorough excision separate unit low pressure (LP) cylinder |
| CN109736908A (en) * | 2019-01-31 | 2019-05-10 | 西安西热节能技术有限公司 | A kind of internal bypass turbine generator system and method applied to cogeneration units |
| CN110219710A (en) * | 2019-03-15 | 2019-09-10 | 华电电力科学研究院有限公司 | A kind of differential pressure power generating system and operation method |
| CN110454249A (en) * | 2019-09-04 | 2019-11-15 | 西安热工研究院有限公司 | A kind of double back pressure turbine low pressure (LP) cylinders zero are contributed heating system and method for adjustment |
| CN112833378A (en) * | 2020-12-28 | 2021-05-25 | 东方电气集团东方汽轮机有限公司 | Reheating system capable of improving heat supply capacity |
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