CN109869205A

CN109869205A - It is a kind of for the heat accumulation of cogeneration units, power generation and heating system

Info

Publication number: CN109869205A
Application number: CN201910234639.9A
Authority: CN
Inventors: 陈群; 张孟起; 葛维春; 刘一涛; 袁野
Original assignee: Tsinghua University; State Grid Liaoning Electric Power Co Ltd; Tieling Power Supply Co of State Grid Liaoning Electric Power Co Ltd
Current assignee: Tsinghua University; State Grid Liaoning Electric Power Co Ltd; Tieling Power Supply Co of State Grid Liaoning Electric Power Co Ltd
Priority date: 2019-03-26
Filing date: 2019-03-26
Publication date: 2019-06-11
Anticipated expiration: 2039-03-26
Also published as: CN109869205B

Abstract

An embodiment of the present invention provides a heat storage, power generation and heat supply system for a cogeneration unit. The system includes: a first heat storage heat exchanger, a first heat storage device, a first control valve and a first circulation pump The first heat storage circuit is formed in turn, and the first heat storage device, the first heat release heat exchanger, the first control valve and the first circulation pump are formed in turn to form the first heat release circuit. The first heat storage circuit is used to store the heat of the steam extracted by the cogeneration unit from the steam extraction pipeline in front of the high pressure cylinder and the steam extraction pipeline in front of the medium pressure cylinder in the first heat storage device; It is used to pressurize and heat condensed water into high-pressure steam. The high-pressure steam can be output to the small steam turbine for power generation, and the feed water can be heated by the regenerator, and it can also be adjusted to meet the needs of steam users after adjusting the temperature and pressure, or enter the first station of the heating network for heating. On the premise of ensuring the heating load, the embodiment of the present invention realizes the decoupling of the electrical output and the thermal output of the cogeneration unit, thereby improving the flexibility of the electrical output of the unit.

Description

It is a kind of for the heat accumulation of cogeneration units, power generation and heating system

Technical field

The present embodiments relate to technical field of energy utilization more particularly to a kind of heat accumulation for cogeneration units, Power generation and heating system.

Background technique

Cogeneration of heat and power is to improve a kind of power-saving technology of efficiency of energy utilization based on cascaded utilization of energy principle.In thermoelectricity In coproduction unit, high temperature, the high steam obtained by modes such as combustion of fossil fuel, solar energy heating, nuclear fuel reactions is first First for generating electricity, the steam of lower temperature is used for heat supply after power generation, and therefore, cogeneration units have energy saving, reduction greatly Many advantages, such as urban land, is saved in gas pollution.

In heat supply, in order to meet the thermic load of the users such as industry, resident, there is minimum main steaming in Conventional thermoelectric coproduction unit The limitation such as vapour amount and maximum sucking rate, therefore steam flows through the amount of work of steam turbine there are lower limit, i.e., unit is with " electricity determining by heat " Mode operation, which limits unit electricity power output regulating power.With renewable energy power generations such as China's wind energy, solar energy Technology is greatly developed, and the electricity of minimum existing for cogeneration units power output reduces the power generation space of renewable energy when heat supply, Result in large-scale " abandonment " and " abandoning light " problem and power network safety operation problem.

Under the premise of guaranteeing heating demand, cogeneration units can pass through bypass high pressure cylinder and intermediate pressure cylinder (steam stream Journey transformation) mode, by a part of high pressure cylinder and intermediate pressure cylinder be used for generate electricity high-temperature steam by bypass extract, be used to Heat supply increases the heat power output of unit with this, reduces the electricity power output of unit, so that renewable energy be promoted to dissolve, improves power grid fortune Capable security and stability.However, although the program effectively reduces the electricity power output of cogeneration units, but also reduce machine The generating efficiency of group.

Summary of the invention

In view of the above-mentioned problems, the embodiment of the present invention provide it is a kind of for the heat accumulation of cogeneration units, power generation and heat supply system System, comprising:

First heat storage exchanger, the first heat-storing device, the first heat release heat exchanger, the first control valve, first pressure regulating valve, First feed pump, second pressure regulating valve, first circulation pump, regenerator, steam temp lowering device, the first triple valve, small turbine and Gateway Station in Heating Network, in which:

First heat storage exchanger, first heat-storing device, first control valve and the first circulation pump according to The first heat accumulation circuit of secondary composition, first heat-storing device, first heat release heat exchanger, first control valve and described One circulating pump successively forms the first heat release circuit, and first heat accumulation circuit is used for the steam extraction before high pressure cylinder by cogeneration units The heat of extracted steam is stored in first heat-storing device in bleed steam pipework before pipeline and intermediate pressure cylinder；

The entrance of first heat release heat exchanger is connect by the first feed pump with condensed water output end, first heat release Circuit is heated into high pressure steaming for being pressurized condensed water in first feed pump in first heat release heat exchanger Vapour；

The steam (vapor) outlet of first heat release heat exchanger is connect with the entrance of the small turbine, and the small turbine utilizes The steam carries out work done, and can be used for generating electricity；

The steam (vapor) outlet of first heat release heat exchanger is connect with the steam temp lowering device, the steam temp lowering device for pair The steam carries out temperature adjustment, and the outlet of the steam temp lowering device is connect with the second pressure regulating valve, the second pressure tune Save valve be used for the steam carry out pressure regulation so that the steam after temperature adjustment, pressure regulation can satisfy steam user demand or into Enter the Gateway Station in Heating Network and carries out heat supply；

The steam (vapor) outlet of first heat release heat exchanger is also connect with the regenerator, to be described return using the steam The water supply of cogeneration units is heated in hot device.

It is provided in an embodiment of the present invention a kind of for the heat accumulation of cogeneration units, power generation and heating system, it can basis Actual needs realizes heat accumulation, power generation, for heating integrated, when needing to reduce cogeneration units electricity power output, is extracted by bypass The heat of this some vapor is stored in the first heat-storing device by the steam before high pressure cylinder, before intermediate pressure cylinder；It is needing to promote unit When electricity power output, the condensed water after pressurization is heated to be steam using the heat stored in the first heat-storing device, and by the first heat release Steam at heat exchanger exit is exported to small turbine, is generated electricity by small turbine；When needing to increase heat supply/for quantity of steam When, the steam after generating electricity via small turbine can be exported to Gateway Station in Heating Network, to carry out heat supply.It can also be by the first heat release The steam (vapor) outlet of heat exchanger is connect with steam temp lowering device, second pressure regulating valve simultaneously, and steam temp lowering device and second pressure are adjusted Valve is used to carry out temperature adjustment and pressure regulation to steam so that the steam after temperature adjustment, pressure regulation can satisfy steam user demand or into Enter Gateway Station in Heating Network and carries out heat supply；And heating the steam come out can be used for the heating of cogeneration units regenerator, reduce thermoelectricity The heat recovery steam of coproduction unit improves the generating efficiency of cogeneration units.

Under the premise of guaranteeing total heating demand, the minimum electricity for further decreasing cogeneration units goes out the embodiment of the present invention Power, promotes the maximum electricity power output of cogeneration units, and improves the generating efficiency of cogeneration units, realizes cogeneration of heat and power machine The further decoupling of group electricity power output and heat power output, to improve the flexibility of cogeneration units.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root Other attached drawings are obtained according to these attached drawings.

Fig. 1 is a kind of knot for the heat accumulation of cogeneration units, power generation and heating system provided in an embodiment of the present invention Structure schematic diagram；

Fig. 2 is provided in an embodiment of the present invention a kind of for the heat accumulation of back pressure type cogeneration units, power generation and heat supply system The structural schematic diagram of system；

Fig. 3 is provided in an embodiment of the present invention a kind of for the heat accumulation of extraction condensing type cogeneration unit, power generation and heat supply system The structural schematic diagram of system；

Fig. 4 and Fig. 5 is provided in an embodiment of the present invention a kind of for the heat accumulation of back pressure type cogeneration units, power generation and confession Hot systems carry out the process schematic of power generation and heat supply；

Fig. 6 is provided in an embodiment of the present invention a kind of for the heat accumulation of back pressure type cogeneration units, power generation and heat supply system System carries out the process schematic of heat supply；

Fig. 7 is provided in an embodiment of the present invention a kind of for the heat accumulation of back pressure type cogeneration units, power generation and heat supply system System carries out the process schematic for steam；

Fig. 8 is provided in an embodiment of the present invention a kind of for the heat accumulation of back pressure type cogeneration units, power generation and heat supply system System heats water supply by regenerator, for reducing the process schematic of main steam turbine steam extraction amount；

Fig. 9 and Figure 10 be a kind of heat accumulation for extraction condensing type cogeneration unit provided in an embodiment of the present invention, power generation and Heating system carries out the process schematic of power generation and heat supply；

Figure 11 is provided in an embodiment of the present invention a kind of for the heat accumulation of extraction condensing type cogeneration unit, power generation and heat supply system System carries out the process schematic of heat supply；

Figure 12 is provided in an embodiment of the present invention a kind of for the heat accumulation of extraction condensing type cogeneration unit, power generation and heat supply system System carries out the process schematic for steam；

Figure 13 is provided in an embodiment of the present invention a kind of for the heat accumulation of extraction condensing type cogeneration unit, power generation and heat supply system System heats water supply by regenerator, for reducing the process schematic of main steam turbine steam extraction amount.

Appended drawing reference:

1, the first heat storage exchanger；2, the first heat-storing device；

3, the first heat release heat exchanger；4, regenerator；

5, small turbine；6, steam temp lowering device；

7, mechanical heat pump；8, Gateway Station in Heating Network；

9, the second heat release heat exchanger；10, the second heat-storing device；

11, the second heat storage exchanger；12, bleed steam pipework output end before high pressure cylinder；

13, bleed steam pipework output end before intermediate pressure cylinder；14, bleed steam pipework output end after intermediate pressure cylinder；

15, steam (vapor) outlet；16, condenser entrance；

17, condensed water bypasses output end；18, regenerator steam (vapor) outlet；

19, regenerator feed-water inlet；20, regenerator feedwater outlet；

21, main steam turbine low pressure (LP) cylinder exhaust vent；22, desuperheating water；

23, for steam (vapor) outlet；24, the outlet of heat supply network return pipe；

25, heat supply network water supply tube inlet；26, first pressure regulating valve；

27, second pressure regulating valve；28, the first control valve；

29, the first triple valve；30, four-way valve；

31, the second control valve；32, first circulation pump；

33, second circulation pump；34, the first feed pump；

35, pumps for hot water supply net.

Specific embodiment

In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.

Power plant not only produces electric energy, but also is to the production method of user's heat supply using the steam for making function in steam turbine The technical process for referring to while producing electricity, thermal energy, the mode compared with production electric energy respectively, thermal energy save fuel.With cogeneration of heat and power side The power plant of formula operation is known as steam power plant, and the same unit is known as cogeneration units.

In heat supply, in order to guarantee the heat demand of the users such as industry, resident, Conventional thermoelectric coproduction unit exists minimum main Quantity of steam, therefore, steam flow through the amount of work (i.e. generated energy) of steam turbine there are lower limit, i.e. the mode of unit " electricity determining by heat " is transported Row, which limits the regulating powers of unit electricity power output.

In view of the above-mentioned problems, Fig. 1 be a kind of heat accumulation for cogeneration units provided in an embodiment of the present invention, power generation and The structural schematic diagram of heating system.As shown in Figure 1, the heat accumulation electricity generation system includes: the first heat storage exchanger 1, the first heat accumulation dress Set the 2, first heat release heat exchanger 3, the first control valve 28, first pressure regulating valve 26, the first feed pump 34, second pressure regulating valve 27, first circulation pump 32, regenerator 4, steam temp lowering device 6, the first triple valve 29, small turbine 5 and Gateway Station in Heating Network 8, in which:

First heat storage exchanger 1, first heat-storing device 2, first control valve 28 and the first circulation Pump 32 successively forms the first heat accumulation circuit, first heat-storing device 2, first heat release heat exchanger 3, first control valve 28 and first circulation pump 32 successively form the first heat release circuit, first heat accumulation circuit be used for by cogeneration units from Before high pressure cylinder before bleed steam pipework (high pressure cylinder bypass) and intermediate pressure cylinder in bleed steam pipework (intermediate pressure cylinder bypass) extracted steam heat It is stored in first heat-storing device 2；

The entrance of first heat release heat exchanger 3 is connect by first feed pump 34 with condensed water output end 17, institute The first heat release circuit is stated for condensed water to be pressurized in first feed pump 34, and in first heat release heat exchanger 3 It is heated into high steam.

Specifically, in the embodiment of the present invention, before the first end of the first heat storage exchanger 1 and the high pressure cylinder of cogeneration units Bleed steam pipework 12 is connected by first pressure regulating valve 26, in the second end and cogeneration units of the first heat storage exchanger 1 Bleed steam pipework 13 connects before cylinder pressure, the first heat storage exchanger 1, the first heat-storing device 2, the first control valve 28 and first circulation pump 32 Successively form the first heat accumulation circuit, the first heat-storing device 2, the first heat release heat exchanger 3, the first control valve 28 and first circulation pump 32 The first heat release circuit is successively formed, the entrance of the first heat release heat exchanger 3 passes through first feed pump 34 and condensed water output end 17 connections.

First control valve 28 can according to need, and can be set to triple valve, four-way valve or other multiple-way valves, and the present invention is real It applies in example as triple valve.

When the system works, bleed steam pipework (the high pressure cylinder bypass) before high pressure cylinder by cogeneration units of the first heat accumulation circuit It is stored in the first heat-storing device with the heat of extracted steam in bleed steam pipework before intermediate pressure cylinder (intermediate pressure cylinder bypass), specifically:

Cogeneration units from before bleed steam pipework before high pressure cylinder and intermediate pressure cylinder in bleed steam pipework extracting high-temperature steam to first In heat storage exchanger, steam exchanges heat with the loop medium in the first heat storage exchanger, and loop medium and heat accumulation working medium exist It exchanges heat in first heat-storing device, it, will be in heat storage and the first heat-storing device with this.

First heat release circuit will be heated into steaming in the first heat release heat exchanger 3 through the pressurized condensed water of the first feed pump Vapour, specifically:

First heat release heat exchanger 3 is connect by the first feed pump 34 with condensed water output end 17, and condensed water is given by first Water pump 34 exchanges heat in the first heat release heat exchanger 3 after pressurizeing with loop medium, and is heated to form high steam.

In first heat storage exchanger, the steam after heat exchange can return to main steam turbine steam-return line by steam (vapor) outlet 15.

It should be noted that the first heat release heat exchanger can be both placed in the first heat-storing device, the first storage can also be placed on Outside thermal.

Need to reduce cogeneration units electricity power output when, by bypass extract high pressure cylinder before, the steam before intermediate pressure cylinder, and The heat of this some vapor is stored in the first heat-storing device.

When needing to be promoted unit electricity power output or increasing heating amount, will be pressurizeed using the heat stored in the first heat-storing device Condensed water afterwards is heated to be high steam, can carry out power generation and heat supply, and the steam that heating comes out can be used by regenerator It is heated in the water supply of cogeneration units, reduces the steam extraction amount of main steam turbine in cogeneration units, improve cogeneration units Generating efficiency.

Specifically, the steam (vapor) outlet of first heat release heat exchanger 3 is connect with the entrance of the small turbine 5, described small Steam turbine 5 is used to carry out work done using the steam, and can be used for generating electricity, and the steam is made to generate electricity via the small turbine 5 Enter 8 heat supply of Gateway Station in Heating Network afterwards.

Further, the steam (vapor) outlet of first heat release heat exchanger 3 is connect with the steam temp lowering device 6, the steam Attemperator 6 is used to carry out the steam temperature adjustment, the outlet of the steam temp lowering device and the second pressure regulating valve 27 connection, The second pressure regulating valve 27 is used to carry out pressure regulation to the steam, so that the steam after temperature adjustment, pressure regulation can satisfy steaming The demand of vapour user enters the Gateway Station in Heating Network 8 progress heat supply.

Further, further includes: the steam (vapor) outlet of first heat release heat exchanger 3 is connect with the regenerator 4, to utilize The steam heats the water supply of cogeneration units in one or more levels described regenerator 4, reduces the steam extraction of main steam turbine Amount, and then promote the generating capacity of unit.The regenerator 4 includes feed-water inlet 19, feedwater outlet 20 and steam (vapor) outlet 18。

As shown in Figure 1, the steam (vapor) outlet of the first heat release heat exchanger 3 is connect with the entrance of small turbine 5, small turbine 5 is used It generates electricity in using steam, and enters 8 heat supply of Gateway Station in Heating Network after so that steam is generated electricity via small turbine 5.

The steam (vapor) outlet of first heat release heat exchanger 3 is also connect with steam temp lowering device 6 and second pressure regulating valve 27, and steam subtracts Warm device 6 is used to carry out steam temperature adjustment, and second pressure regulating valve 27 is used to carry out pressure regulation to steam, so that after temperature adjustment, pressure regulation Steam can satisfy steam user demand or enter Gateway Station in Heating Network 8 carry out heat supply.

The steam (vapor) outlet of first heat release heat exchanger 3 is connect with regenerator 4, to utilize steam in one or more levels regenerator 4 The water supply of middle heating cogeneration units, reduces the steam extraction amount of main steam turbine, and then promote the generating capacity of unit.Regenerator 4 include feed-water inlet 19, feedwater outlet 20 and steam (vapor) outlet 18.

Fig. 2 is provided in an embodiment of the present invention a kind of for the heat accumulation of back pressure type cogeneration units, power generation and heat supply system The structural schematic diagram of system.As shown in Fig. 2, on the basis of the above embodiments, it is preferable that further include: the second heat storage exchanger 11, Second heat-storing device 10, the second heat release heat exchanger 9, the second control valve 31 and second circulation pump 33, in which:

Second heat storage exchanger 11, second heat-storing device 10, second control valve 31 and described second follow Ring pump 33 successively forms the second heat accumulation circuit, second heat-storing device 10, second heat release heat exchanger 9, second control Valve 31 processed and second circulation pump 33 successively form the second heat release circuit, and second heat accumulation circuit is for joining the thermoelectricity Unit is produced from the heat of extracted steam is stored in second heat-storing device 10 in bleed steam pipework 14 after intermediate pressure cylinder；

The entrance of second heat release heat exchanger 9 is connect with heat supply network return water output end 24, and second heat release circuit is used for Heat supply network return water is heated in second heat release heat exchanger 9.Second heat release heat exchanger 9 and the Gateway Station in Heating Network 8 are connected Or it is connected in parallel.

Specifically, the entrance of the second heat storage exchanger 11 connects with bleed steam pipework 14 after the intermediate pressure cylinder of the cogeneration units It connects, the second heat storage exchanger 11, the second heat-storing device 10, the second control valve 31 and second circulation pump 33 successively form the second heat accumulation Circuit, successively composition second is put for the second heat-storing device 10, the second heat release heat exchanger 9, the second control valve 31 and second circulation pump 33 Hot loop.

After heat supply network return water output end 24 is pressurizeed by the second water pump 35, it is connect with the entrance of the second heat release heat exchanger 9, second The outlet of heat release heat exchanger 9 is connect with heat supply initial station 8.Second heat release heat exchanger 9 and Gateway Station in Heating Network 8 can choose series connection or simultaneously Connection connection.

Cogeneration units are from steam is extracted in bleed steam pipework 14 after intermediate pressure cylinder, and steam is via loop medium and heat-storage medium It exchanges heat, heat is stored in the second heat-storing device 10, the heat in the second heat-storing device 10 is used for heat supply network return water It is heated, and heat supply network return water is sent to Gateway Station in Heating Network 8.

Fig. 3 is provided in an embodiment of the present invention a kind of for the heat accumulation of extraction condensing type cogeneration unit, power generation and heat supply system The structural schematic diagram of system, as shown in figure 3, on the basis of the above embodiments, it is preferable that if the cogeneration units are to take out to coagulate Formula cogeneration units, correspondingly, further includes: mechanical heat pump 7, wherein the small turbine 5 drives the mechanical heat pump 7, the entrance of the small turbine 5 is connect with the steam (vapor) outlet of first heat release heat exchanger 3, the outlet of the small turbine 5 It is connect with the low-temperature end of the mechanical heat pump 7.Heat supply network return water output end 24 passes through four-way valve 30 and the mechanical heat pump 7 Temperature end connection.

A part of the heat supply network return water 24 heats in the mechanical heat pump 7, and another part is in second heat release After being heated in heat exchanger 9, output to the Gateway Station in Heating Network 8；Second heat release heat exchanger 9, the mechanical heat pump 7 and described Gateway Station in Heating Network 8, which can choose, to be connected in series or in parallel.

As shown in figure 3, specifically, small turbine 5 drives mechanical heat pump 7, the entrance of small turbine 5 is changed with the first heat release The steam (vapor) outlet of hot device 3 connects, and the outlet of small turbine 5 is connect with the low-temperature end of mechanical heat pump 7.Heat supply network return water output end 24 It is connect by four-way valve 30 with the temperature end of mechanical heat pump 7.

A part of heat supply network return water 24 heats in mechanical heat pump 7, and another part heats in the second heat release heat exchanger 9 Afterwards, it exports to Gateway Station in Heating Network 8；Second heat release heat exchanger 9, mechanical heat pump 7 and the Gateway Station in Heating Network 8 can choose series connection or simultaneously Connection connection.

In summary, the embodiment of the present invention propose for the heat accumulation of cogeneration units, power generation and heating system, can be with According to actual needs, heat accumulation, power generation are realized, for heating integrated, when needing to reduce cogeneration units electricity power output, passes through bypass Extract high pressure cylinder before, the steam before intermediate pressure cylinder, the heat of this some vapor is stored in the first heat-storing device；It is needing to be promoted When unit electricity is contributed, the condensed water after pressurization is heated to be steam using the heat stored in the first heat-storing device, and by first The steam in heat release heat exchanger exit is exported to small turbine, is generated electricity by small turbine；When needing to increase heat supply/for steam When amount, the steam after generating electricity via small turbine can be exported to Gateway Station in Heating Network, to carry out heat supply.First can also be put The steam (vapor) outlet of heat exchanger is connect with steam temp lowering device and second pressure regulating valve, steam temp lowering device and second pressure regulating valve For carrying out temperature adjustment and pressure regulation to steam, so that the steam after temperature adjustment, pressure regulation can satisfy the demand or entrance of steam user Gateway Station in Heating Network carries out heat supply；And heating the steam come out can be used for the heating of cogeneration units regenerator, reduce thermoelectricity connection The heat recovery steam for producing unit, improves the generating efficiency of cogeneration units.

In order to be better illustrated to the embodiment of the present invention, illustrate below by relevant figure the heat accumulation, power generation and The working principle of heating system.

Fig. 2 is provided in an embodiment of the present invention a kind of for the heat accumulation of back pressure type cogeneration units, power generation and heat supply system The structural schematic diagram of system.As shown in Fig. 2, the first heat storage exchanger 1 is connect with the output end 12 of bleed steam pipework before high pressure cylinder, thermoelectricity The steam that coproduction unit is extracted out before high pressure cylinder exports after being depressured via first pressure regulating valve 26 to the first heat storage exchanger 1, It exchanges heat in the first heat storage exchanger 1 with loop medium, loop medium exchanges heat in heat-storing device 2 with first the first matter of heat accumulation work And heat is stored in the first heat-storing device 2.

First heat storage exchanger 1 is connect with the output end 13 of bleed steam pipework before intermediate pressure cylinder, and cogeneration units are from intermediate pressure cylinder Steam is exported to the first heat storage exchanger 1 heat of preceding extraction again, is exchanged heat in the first heat storage exchanger 1 with loop medium, circuit Medium and heat accumulation working medium exchange heat in the first heat-storing device 2 and store heat in the first heat-storing device 2.

Second heat storage exchanger 11 is connect with the output end 14 of bleed steam pipework after intermediate pressure cylinder, and cogeneration units are from intermediate pressure cylinder The steam extracted out afterwards is exported to the second heat storage exchanger 11, is exchanged heat in the second heat storage exchanger 11 with loop medium, and circuit is situated between Matter and heat accumulation working medium exchange heat in the second heat-storing device 10 and store heat in the second heat-storing device 10.

First heat release heat exchanger 3 is connect with condensation water out 17, and condensed water is situated between after pressurizeing via the first water pump 34 with circuit Matter exchanges heat in the first heat release heat exchanger 3, and is heated to form steam.

The steam (vapor) outlet of first heat release heat exchanger 3 is connect with 5 entrance of small turbine, and steam generates electricity via small turbine 5 Afterwards, heat supply network return water 24 is heated into Gateway Station in Heating Network 8.

The steam (vapor) outlet of first heat release heat exchanger 3 is also connect with steam temp lowering device 6 and second pressure regulating valve 27, and steam subtracts Warm device 6 and second pressure regulating valve 27 are used to carry out temperature adjustment and pressure regulation to steam, so that the steam after temperature adjustment, pressure regulation can expire The demand of sufficient steam user enters the progress heat supply of Gateway Station in Heating Network 8；

The steam (vapor) outlet of first heat release heat exchanger 3 is also connect with 4 entrance of cogeneration units regenerator, to be using steam The water supply of cogeneration units is heated in regenerator 4, reduces the heat recovery steam of unit.

Second heat release heat exchanger 9 is connect with the four-way valve 30 at heat supply network backwater outlet end, and heat supply network return water 24 and loop medium exist It exchanges heat in second heat release heat exchanger 9；

The outlet of second heat release heat exchanger 9 is connect with Gateway Station in Heating Network 8, and heat supply network return water 24 exports after being heated to Gateway Station in Heating Network 8。

The output end 12 of bleed steam pipework connects before the first end and high pressure cylinder of first heat storage exchanger 1, cogeneration units The steam extracted out before high pressure cylinder exports after being depressured via pressure-regulating valve to the first heat storage exchanger 1, the first heat storage exchanger 1 Second end and intermediate pressure cylinder before the output end 13 of bleed steam pipework connect, the heat steam again that cogeneration units are extracted out before intermediate pressure cylinder Output exchanges heat in the first heat storage exchanger 1 to the first heat storage exchanger 1, steam and loop medium, loop medium and heat accumulation work Matter exchanges heat in the first heat-storing device 2 and stores heat in the first heat-storing device 2.

The output end 14 of bleed steam pipework connects after the first end and intermediate pressure cylinder of second heat storage exchanger 11, cogeneration units The steam extracted out after intermediate pressure cylinder export to the second heat storage exchanger 11, steam and loop medium and in heat storage exchanger 11 Heat exchange, loop medium and heat accumulation working medium exchange heat in the second heat-storing device 10 and store heat in the second heat-storing device 10；

On the basis of the above embodiments, it is preferable that first heat-storing device utilizes latent heat heat accumulation, is stored up using sensible heat Heat, or utilize chemical heat storage.

Specifically, the first heat-storing device and the second heat-storing device can use latent heat heat accumulation, alternatively, also can use sensible heat Heat accumulation, alternatively, also can use chemical heat storage.

On the basis of the above embodiments, it is preferable that loop medium in first heat-storing device be conduction oil, water, One of melting salt, hydrated salt and liquid state organics.

Fig. 4 is provided in an embodiment of the present invention a kind of for the heat accumulation of back pressure type cogeneration units, power generation and heat supply system System carries out the process schematic of power generation and heat supply, as shown in figure 4, the solid line expression in figure is generated electricity and supplied using small turbine The required component of heat, the specific implementation process is as follows:

The steam (vapor) outlet of first heat release heat exchanger 3 is connect with 5 entrance of small turbine, small turbine 5 and heat supply initial station in factory It is connected in series, small turbine 5 enters heat supply network head for generating electricity using steam after so that steam is generated electricity via small turbine 5 It stands 8 heat supplies.Steam heats heat supply network return water into Gateway Station in Heating Network 8, steam is in heat supply network after generating electricity via small turbine 5 At first stop 8 exchange heat after, export to heat supply network draining system, heat supply network return water after Gateway Station in Heating Network 8 exchanges heat, output to heat supply network confession Water pipe.The outlet of second heat release heat exchanger 9 and Gateway Station in Heating Network 8 are connected in series, and heat supply network return water exports after being preheated to Gateway Station in Heating Network 8。

Specifically, the output end 12 of bleed steam pipework connects before the first end of the first heat storage exchanger 1 and high pressure cylinder, thermoelectricity connection It produces after the steam that unit is extracted out before high pressure cylinder is depressured via pressure-regulating valve and exports to the first heat storage exchanger 1, the first heat accumulation The output end 13 of bleed steam pipework connects before the second end and intermediate pressure cylinder of heat exchanger 1, what cogeneration units were extracted out before intermediate pressure cylinder Hot steam again is exported to the first heat storage exchanger 1, steam and loop medium to exchange heat in the first heat storage exchanger 1, loop medium It exchanges heat in the first heat-storing device 2 with heat accumulation working medium and stores heat in the first heat-storing device 2.

The output end 14 of bleed steam pipework connects after the first end and intermediate pressure cylinder of second heat storage exchanger 11, cogeneration units The steam extracted out after intermediate pressure cylinder is exported to the second heat storage exchanger 11, steam and loop medium in the second heat storage exchanger 11 Heat exchange, loop medium and heat accumulation working medium exchange heat in the second heat-storing device 10 and store heat in the second heat-storing device 10.

Fig. 5 is provided in an embodiment of the present invention a kind of for the heat accumulation of back pressure type cogeneration units, power generation and heat supply system System carries out the process schematic of power generation and heat supply, as shown in figure 5, the solid line in figure indicates portion needed for carrying out power generation and heat supply Part, the specific implementation process is as follows:

The steam (vapor) outlet of first heat release heat exchanger 3 is connect with 5 entrance of small turbine, small turbine 5 and heat supply initial station in factory It is connected in series, small turbine 5 enters heat supply network head for generating electricity using steam after so that steam is generated electricity via small turbine 5 It stands 8 heat supplies.Steam heats heat supply network return water into Gateway Station in Heating Network 8, steam is in heat supply network after generating electricity via small turbine 5 At first stop 8 exchange heat after, export to heat supply network draining system, heat supply network return water after Gateway Station in Heating Network 8 exchanges heat, output to heat supply network confession Water pipe.The first end of second heat release heat exchanger 9 is connect with heat supply network backwater outlet end, and second end is connect with heat supply network water supplying pipe 25, heat Net return water via triple valve distribute flow, a part enter heat release heat exchanger 9 exchange heat after output to heat supply network supply water, another part into Enter output to heat supply network after Gateway Station in Heating Network 8 exchanges heat to supply water.Second heat release heat exchanger 9 is connected in parallel with Gateway Station in Heating Network 8.

Specifically, the output end 12 of bleed steam pipework connects before the first end of the first heat storage exchanger 1 and high pressure cylinder, thermoelectricity connection It produces after the steam that unit is extracted out before high pressure cylinder is depressured via pressure-regulating valve and exports to the first heat storage exchanger 1, the first heat accumulation The output end 13 of bleed steam pipework connects before the second end and intermediate pressure cylinder of heat exchanger 1, what cogeneration units were extracted out before intermediate pressure cylinder Hot steam again is exported to heat storage exchanger 1, steam and loop medium to exchange heat in the first heat storage exchanger 1, loop medium and storage Hot working fluid exchanges heat in the first heat-storing device 2 and stores heat in the first heat-storing device 2.

Fig. 6 is provided in an embodiment of the present invention a kind of for the heat accumulation of back pressure type cogeneration units, power generation and heat supply system Unite the process schematic of heat supply, as shown in fig. 6, solid line in figure indicate heat supply needed for component, the specific implementation process is as follows:

The steam (vapor) outlet of first heat release heat exchanger 3 is also connect with steam temp lowering device 6 and second pressure regulating valve 27, the second pressure Force regulating valve 27 is connect with triple valve 29；Triple valve 29 is connect with Gateway Station in Heating Network 8；Steam temp lowering device 6 and second pressure regulating valve 27 for carrying out temperature adjustment and pressure regulation to steam, so that the steam after temperature adjustment, pressure regulation, which is able to enter Gateway Station in Heating Network 8, carries out heat supply； 9 first end of heat release heat exchanger is connect with the triple valve at heat supply network backwater outlet end, and second end is connect with Gateway Station in Heating Network 8, heat supply network return water It exports after being preheated to Gateway Station in Heating Network 8.

Fig. 7 is provided in an embodiment of the present invention a kind of for the heat accumulation of non-condensing cogeneration units, power generation and heat supply System carries out the process schematic for steam, as shown in fig. 7, the solid line in figure is indicated for component needed for steam, specific implementation Process is as follows:

The steam (vapor) outlet of first heat release heat exchanger 3 is also connect with steam temp lowering device 6 and second pressure regulating valve 27, the second pressure Force regulating valve 27 is connect with triple valve 29；Triple valve 29 is connect with for steam inlet 23；Steam temp lowering device 6 and second pressure are adjusted Valve 27 is used to carry out temperature adjustment and pressure regulation to steam so that the steam after temperature adjustment, pressure regulation can satisfy the demand of steam user into Enter for steam inlet 23；9 first end of heat release heat exchanger is connect with the triple valve at heat supply network backwater outlet end, second end and Gateway Station in Heating Network 8 connections, heat supply network return water export after being preheated to Gateway Station in Heating Network 8.

Fig. 8 is provided in an embodiment of the present invention a kind of for the heat accumulation of back pressure type cogeneration units, power generation and heat supply system System heats water supply by regenerator, for reducing the process schematic of main steam turbine steam extraction amount, as shown in figure 8, the solid line in figure Indicate component needed for reducing heat recovery steam, the specific implementation process is as follows:

The outlet of first heat release heat exchanger 3 couples with 4 entrance of cogeneration units regenerator, and steam is in one or more levels backheat Water supply 19 is heated in device, reduces the heat recovery steam in one or more levels regenerator of unit, and then reduce the coal consumption of unit.

After steam completes heat exchange in one or more levels regenerator, output to next stage regenerator 18.Water supply 19 is in backheat After completing heat exchange in device, output to next stage regenerator entrance 20 continues to be heated.The outlet of second heat release heat exchanger 9 with Gateway Station in Heating Network 8 couples, and heat supply network return water 24 exports after being preheated to Gateway Station in Heating Network 8.

Specifically, the output end 12 of bleed steam pipework connects before the first end of the first heat storage exchanger 1 and high pressure cylinder, thermoelectricity connection It produces after the steam that unit is extracted out before high pressure cylinder is depressured via pressure-regulating valve and exports to the first heat storage exchanger 1, the first heat accumulation The output end 13 of bleed steam pipework connects before the second end and intermediate pressure cylinder of heat exchanger 1, what cogeneration units were extracted out before intermediate pressure cylinder Hot steam is exported to the first heat storage exchanger 1, steam and loop medium and is exchanged heat in the first heat storage exchanger 1, loop medium with Heat accumulation working medium exchanges heat in the first heat-storing device 2 and stores heat in the first heat-storing device 2.

The embodiment of the present invention propose for the heat accumulation of cogeneration units, power generation and heating system, can be according to reality It needs, realizes heat accumulation, power generation, heat supply integral system, when needing to reduce cogeneration units electricity power output, extracted by bypass The heat of this some vapor is stored in the first heat-storing device by the steam before high pressure cylinder, before intermediate pressure cylinder；It is needing to promote unit When electricity power output, condensed water is heated to be steam using the heat stored in the first heat-storing device, it can be by the first heat release heat exchanger The steam in exit is exported to small turbine, is generated electricity by small turbine；It, can be with when needing to increase heat supply/for quantity of steam The steam after generating electricity via small turbine is exported to Gateway Station in Heating Network, to carry out heat supply.It can also be by the first heat release heat exchanger Steam (vapor) outlet is connect with steam temp lowering device and second pressure regulating valve, and steam temp lowering device and second pressure regulating valve are used for steam Carry out temperature adjustment and pressure regulation so that the steam after temperature adjustment, pressure regulation can satisfy the demand of steam user or enter Gateway Station in Heating Network into Row heat supply；And heating the steam come out can be used for the heating of cogeneration units regenerator, reduce returning for cogeneration units Hot steam improves the generating efficiency of cogeneration units.The embodiment of the present invention is under the premise of guaranteeing total heating demand, further The minimum electricity power output for reducing cogeneration units, promotes the maximum electricity power output of cogeneration units, and improves cogeneration units Generating efficiency, realize cogeneration units electricity power output and heat power output further decoupling, to improve cogeneration of heat and power machine The flexibility of group.

It is carried out below for heat accumulation, power supply and the heat supplying process that cogeneration units are extraction condensing type cogeneration unit detailed Explanation.

As shown in figure 3, the first heat storage exchanger 1 is connect with the output end 12 of bleed steam pipework before high pressure cylinder, also, the first storage First pressure regulating valve 26 is installed, cogeneration units are taken out before high pressure cylinder before heat exchanger 1 and high pressure cylinder between bleed steam pipework Output is to the first heat storage exchanger 1 after steam out is depressured via pressure-regulating valve, and the steam and loop medium of extraction are first It exchanges heat in heat storage exchanger 1, loop medium exchanges heat in the first heat-storing device 2 with heat accumulation working medium, and heat is stored in first In heat-storing device 2.

First heat storage exchanger 1 is connect with the output end 13 of bleed steam pipework before intermediate pressure cylinder, and cogeneration units are from intermediate pressure cylinder The hot steam of preceding extraction is exported to the first heat storage exchanger 1, and the hot steam and loop medium of extraction are in the first heat storage exchanger 1 Heat exchange, loop medium exchanges heat in the first heat-storing device 2 with heat accumulation working medium, and heat is stored in the first heat-storing device 2.

Second heat storage exchanger 11 is connect with the output end 14 of bleed steam pipework after intermediate pressure cylinder, and cogeneration units are from intermediate pressure cylinder The steam extracted out afterwards is exported to the second heat storage exchanger 11, and the steam and loop medium of extraction change in the second heat storage exchanger 11 Heat, loop medium exchanges heat in the second heat-storing device 10 with heat accumulation working medium, and energy is stored in the second heat-storing device 10.

The steam (vapor) outlet of first heat release heat exchanger 3 is connect with 5 entrance of small turbine, wherein the mechanical heat of small turbine driving Pump, the outlet of small turbine 5 with mechanically the low-temperature end of heat pump 7 connect.The temperature end and Gateway Station in Heating Network of mechanical heat pump 7 connect It connects, steam mixes, the machine driven into small turbine 5 after generating electricity via small turbine 5 with host low pressure (LP) cylinder outlet steam discharge 21 Tool formula heat pump 7 is heated into the heat supply network return water before Gateway Station in Heating Network 8.

Fig. 9 is provided in an embodiment of the present invention a kind of for the heat accumulation of extraction condensing type cogeneration unit, power generation and heat supply system System carries out the process schematic of power generation and heat supply, as shown in figure 9, the solid line in figure indicates portion needed for carrying out power generation and heat supply Part, the specific implementation process is as follows:

The steam (vapor) outlet of first heat release heat exchanger 3 is connect with 5 entrance of small turbine, wherein the mechanical heat of small turbine driving Pump, the outlet of small turbine with mechanically the low-temperature end of heat pump connect.The temperature end of mechanical heat pump is connect with Gateway Station in Heating Network, Steam is mixed with host low pressure (LP) cylinder outlet steam discharge, is driven into small turbine 5 mechanical after generating electricity via small turbine 5 Heat pump 7 is heated into the heat supply network return water 24 before Gateway Station in Heating Network 8.Steam is after mechanical heat pump 7 exchanges heat, output To cogeneration units condenser outlet 16；After the preheating of mechanical heat pump 7, output to Gateway Station in Heating Network 8 carries out heat supply network return water 24 Heat exchange.The outlet of second heat release heat exchanger 9 and Gateway Station in Heating Network 8 are connected in series, and heat supply network return water exports after being preheated to Gateway Station in Heating Network 8。

Specifically, the output end 12 of bleed steam pipework connects before the first end of the first heat storage exchanger 1 and high pressure cylinder, thermoelectricity connection It produces after the steam that unit is extracted out before high pressure cylinder is depressured via first pressure regulating valve 26 and exports to the first heat storage exchanger 1, the The output end 13 of bleed steam pipework connects before the second end and intermediate pressure cylinder of one heat storage exchanger 1, and cogeneration units are before intermediate pressure cylinder The hot steam again of extraction is exported to the first heat storage exchanger 1, steam and loop medium to exchange heat in the first heat storage exchanger 1, returns Road medium and heat accumulation working medium exchange heat in the first heat-storing device 2 and store heat in the first heat-storing device 2.

Figure 10 is provided in an embodiment of the present invention a kind of for the heat accumulation of extraction condensing type cogeneration unit, power generation and heat supply system System carries out the process schematic of power generation and heat supply, as shown in Figure 10, portion needed for the solid line expression in figure carries out power generation and heat supply Part, the specific implementation process is as follows:

The steam (vapor) outlet of first heat release heat exchanger 3 is connect with 5 entrance of small turbine, wherein the mechanical heat of small turbine driving Pump, the outlet of small turbine with mechanically the low-temperature end of heat pump connect.The temperature end of mechanical heat pump is connect with Gateway Station in Heating Network, Steam is mixed with host low pressure (LP) cylinder outlet steam discharge, is driven into small turbine 5 mechanical after generating electricity via small turbine 5 Heat pump 7 is heated into the heat supply network return water 24 before Gateway Station in Heating Network 8.Steam is after mechanical heat pump 7 exchanges heat, output To cogeneration units condenser outlet 16；After the preheating of mechanical heat pump 7, output to Gateway Station in Heating Network 8 carries out heat supply network return water 24 Heat exchange.

The first end of second heat release heat exchanger 9 is connect with heat supply network backwater outlet end, and second end is connect with heat supply network water supplying pipe 25, Heat supply network return water 24 via four-way valve 30 distribute flow, a part enter mechanical heat pump 7 heat exchange after output to heat supply network supply water 25, one To heat supply network water supply 25, another part, which enters after Gateway Station in Heating Network 8 exchanges heat, to be exported for output after part enters the heat exchange of the second heat release heat exchanger 9 To heat supply network water supply 25；Second heat release heat exchanger 9 is connected in parallel with Gateway Station in Heating Network 8.Steam after mechanical heat pump 7 exchanges heat, Output to cogeneration units condenser exports 16；

The output end 14 of bleed steam pipework connects after the first end and intermediate pressure cylinder of second heat storage exchanger 11, cogeneration units The steam extracted out after intermediate pressure cylinder is exported to the second heat storage exchanger 11, steam and loop medium in the second heat storage exchanger 11 Heat exchange, loop medium and heat accumulation working medium exchange heat in heat-storing device 10 and store heat in the second heat-storing device 10.

Figure 11 is provided in an embodiment of the present invention a kind of for the heat accumulation of extraction condensing type cogeneration unit, power generation and heat supply system System carries out the process schematic of heat supply, and as shown in figure 11, component needed for the solid line in figure indicates heat supply, specific implementation process is such as Under:

The outlet of first heat release heat exchanger 3 is connect with steam temp lowering device 6 and second pressure regulating valve 27, second pressure regulating valve 27 connect with triple valve 29, and triple valve 29 is connect with Gateway Station in Heating Network 8, steam temp lowering device 6 and second pressure regulating valve 27 for pair Steam carries out temperature adjustment and pressure regulation, so that the steam after temperature adjustment, pressure regulation, which enters Gateway Station in Heating Network 8, carries out heat supply；Second heat release heat exchange The first end of device 9 is connect with the triple valve at heat supply network backwater outlet end, and the second end and Gateway Station in Heating Network 8 of the second heat release heat exchanger 9 connect It connects, heat supply network return water exports after being preheated to Gateway Station in Heating Network 8.

Figure 12 is provided in an embodiment of the present invention a kind of for the heat accumulation of extraction condensing type cogeneration unit, power generation and heat supply system System carries out the process schematic for steam, and as shown in figure 12, the solid line in figure indicates to implement for component needed for steam Journey is as follows:

Figure 13 is provided in an embodiment of the present invention a kind of for the heat accumulation of extraction condensing type cogeneration unit, power generation and heat supply system System heats water supply by regenerator, for reducing the process schematic of main steam turbine steam extraction amount, as shown in figure 13, the reality in figure Line indicates component needed for reducing heat recovery steam, the specific implementation process is as follows:

Specifically, the first end of the first heat storage exchanger 1 couples with the output end 12 of bleed steam pipework before high pressure cylinder, thermoelectricity connection It produces after the steam that unit is extracted out before high pressure cylinder is depressured via pressure-regulating valve and exports to the first heat storage exchanger 1, the first heat accumulation The second end of heat exchanger 1 couples with the output end 13 of bleed steam pipework before intermediate pressure cylinder, what cogeneration units were extracted out before intermediate pressure cylinder Steam is exported to the first heat storage exchanger 1 heat again, and steam and loop medium exchange heat in heat storage exchanger 1, loop medium and storage Hot working fluid exchanges heat in heat-storing device 2 and stores heat in heat-storing device 2.

The first end of second heat storage exchanger 11 couples with the output end 14 of bleed steam pipework after intermediate pressure cylinder, cogeneration units The steam extracted out after intermediate pressure cylinder is exported to the second heat storage exchanger 11, steam and loop medium in the second heat storage exchanger 11 Heat exchange, loop medium and heat accumulation working medium exchange heat in the second heat-storing device 10 and store heat in the second heat-storing device 10.

The heat accumulation of the system, power generation and heat supplying process are for extraction condensing type cogeneration unit in Fig. 9 to Figure 13.

In summary, the embodiment of the present invention propose for the heat accumulation of cogeneration units, power generation and heating system, can be with According to actual needs, heat accumulation, power generation, heat supply integral system are realized, when needing to reduce cogeneration units electricity power output, is passed through It bypasses before extracting high pressure cylinder, the steam before intermediate pressure cylinder, the heat of this some vapor is stored in the first heat-storing device；It is needing When promoting unit electricity power output, condensed water is heated to be steam using the heat stored in the first heat-storing device, first can be put The steam in heat exchanger exit is exported to small turbine, is generated electricity by small turbine；When needing to increase heat supply/for quantity of steam When, the steam after generating electricity via small turbine can be exported to Gateway Station in Heating Network, to carry out heat supply.It can also be by the first heat release The steam (vapor) outlet of heat exchanger is connect with steam temp lowering device and second pressure regulating valve, and steam temp lowering device and second pressure regulating valve are used In carrying out temperature adjustment and pressure regulation to steam, so that the steam after temperature adjustment, pressure regulation can satisfy the demand of steam user or enter heat Net initial station carries out heat supply；And heating the steam come out can be used for the heating of cogeneration units regenerator, reduce cogeneration of heat and power The heat recovery steam of unit improves the generating efficiency of cogeneration units.

The apparatus embodiments described above are merely exemplary, wherein described, unit can as illustrated by the separation member It is physically separated with being or may not be, component shown as a unit may or may not be physics list Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs In some or all of the modules achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness Labour in the case where, it can understand and implement.

Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation Method described in certain parts of example or embodiment.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features； And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and Range.

Claims

1. a kind of for the heat accumulation of cogeneration units, power generation and heating system characterized by comprising the first heat storage and exchange Device, the first heat-storing device, the first heat release heat exchanger, the first control valve, first pressure regulating valve, the first feed pump, second pressure Regulating valve, first circulation pump, regenerator, steam temp lowering device, the first triple valve, small turbine and Gateway Station in Heating Network, in which:

First heat storage exchanger, first heat-storing device, first control valve and the first circulation pump successively group At the first heat accumulation circuit, first heat-storing device, first heat release heat exchanger, first control valve and described first are followed Ring pump successively forms the first heat release circuit, and first heat accumulation circuit is used for cogeneration units the bleed steam pipework before high pressure cylinder With the heat of extracted steam is stored in first heat-storing device in bleed steam pipework before intermediate pressure cylinder；

The entrance of first heat release heat exchanger is connect by first feed pump with condensed water output end, first heat release Circuit is heated into high pressure steaming for being pressurized condensed water in first feed pump in first heat release heat exchanger Vapour；

The steam (vapor) outlet of first heat release heat exchanger is connect with the entrance of the small turbine, described in the small turbine utilization Steam carries out work done, and for generating electricity；

The steam (vapor) outlet of first heat release heat exchanger is connect with the steam temp lowering device, and the steam temp lowering device is used for described Steam carries out temperature adjustment, and the outlet of the steam temp lowering device is connect with the second pressure regulating valve, the second pressure regulating valve For carrying out pressure regulation to the steam, so that the steam after temperature adjustment, pressure regulation can satisfy the demand of steam user or enter institute It states Gateway Station in Heating Network and carries out heat supply；

The steam (vapor) outlet of first heat release heat exchanger is also connect with the regenerator, to utilize the steam for the regenerator The water supply of middle cogeneration units is heated.

2. system according to claim 1, which is characterized in that further include: the second heat storage exchanger, the second heat-storing device, Two heat release heat exchangers, the second control valve and second circulation pump, in which:

Second heat storage exchanger, second heat-storing device, second control valve and the second circulation pump successively group At the second heat accumulation circuit, second heat-storing device, second heat release heat exchanger, second control valve and described second are followed Ring pump successively forms the second heat release circuit, and second heat accumulation circuit is used for the steam extraction after intermediate pressure cylinder by the cogeneration units The heat of extracted steam is stored in second heat-storing device in pipeline；

The entrance of second heat release heat exchanger is connect with heat supply network return water output end, and second heat release circuit is used to return heat supply network Water heats in second heat release heat exchanger.

3. system according to claim 2, which is characterized in that the outlet and the Gateway Station in Heating Network of second heat release heat exchanger Connection, the heat supply network return water export after being heated to the Gateway Station in Heating Network.

4. system according to claim 2, which is characterized in that the steam is directly entered after generating electricity via the small turbine The Gateway Station in Heating Network heat supply.

5. system according to claim 2, which is characterized in that if the cogeneration units are non-condensing cogeneration of heat and power machine Group, correspondingly, second heat release heat exchanger are connect with the Gateway Station in Heating Network, and the heat supply network return water exchanges heat in second heat release After being heated in device, output to the Gateway Station in Heating Network；

Or, after described heat supply network return water a part heats in second heat release heat exchanger, output to the heat supply network water supplying pipe, institute It states heat supply network return water another part and is directly output to the Gateway Station in Heating Network；

Second heat release heat exchanger and the Gateway Station in Heating Network are connected in series or in parallel.

6. system according to claim 2, which is characterized in that if the cogeneration units are extraction condensing type cogeneration machine Group, correspondingly, further includes: mechanical heat pump, wherein the small turbine drives the mechanical heat pump, the small turbine Outlet is connect with the low-temperature end of the mechanical heat pump, and the heat supply network return water output end passes through four-way valve and the mechanical heat pump Temperature end connection；

Described heat supply network return water a part heats in the mechanical heat pump, and another part adds in second heat release heat exchanger After heat, output to the Gateway Station in Heating Network；

Or, described heat supply network return water a part is in the mechanical heat pump, a part heats in second heat release heat exchanger Afterwards, to the heat supply network water supplying pipe, described heat supply network return water another part is directly output to the Gateway Station in Heating Network for output；

Second heat release heat exchanger, the mechanical heat pump and the Gateway Station in Heating Network are connected in series or in parallel.

7. system according to claim 6, which is characterized in that after the steam generates electricity via the small turbine, with main vapour Turbine low pressure (LP) cylinder enters the mechanical heat pump after exporting steam discharge mixing.

8. system according to claim 6, which is characterized in that the mechanical heat pump of the small turbine driving passes through Absorb steam discharge heat or by absorb cooling water in heat, with to enter the Gateway Station in Heating Network before heat supply network return water add Heat.

9. system according to claim 1, which is characterized in that first heat-storing device utilizes latent heat heat accumulation, utilizes sensible heat Heat accumulation, or utilize chemical heat storage.

10. system according to claim 1, which is characterized in that loop medium in first heat-storing device be conduction oil, One of water, melting salt, hydrated salt and liquid state organics.