CN217357015U - Multi-unit cooperative combined heat and power generation system - Google Patents
Multi-unit cooperative combined heat and power generation system Download PDFInfo
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- CN217357015U CN217357015U CN202221184345.3U CN202221184345U CN217357015U CN 217357015 U CN217357015 U CN 217357015U CN 202221184345 U CN202221184345 U CN 202221184345U CN 217357015 U CN217357015 U CN 217357015U
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Abstract
The utility model discloses a multiunit cooperative combined heat and power generation system. The system divides the return water heating process of the heat supply network into 2 stages: after the heat supply network circulating water pump is pressurized, the steam enters a 3# unit condenser and a heat supply condenser at first, the exhaust steam of a 2# unit is used for heating, then the exhaust steam is divided into two parts, one part enters a heat supply network heater and is heated by the steam extraction of a steam turbine, the other part enters a small steam turbine exhaust steam heater, the exhaust steam of the small steam turbine of the heat supply network circulating water pump is used for heating, then the exhaust steam is converged, and the heat supply is carried out externally. The system reasonably distributes heating heat sources at different stages, reasonably utilizes the waste heat of the system, and has higher energy utilization rate of the unit; the steam extraction source can be adjusted according to the running condition of the unit, and flexible running of the unit is facilitated.
Description
Technical Field
The utility model belongs to the technical field of the combined heat and power generation, concretely relates to multiunit is cooperative combined heat and power generation system.
Background
The electric power is the power of economic society development, along with the development of society, in order to reduce carbon emission, the installed capacities of time-varying strong wind energy, solar energy and the like are rapidly increased, the coal-fired generating set is changed to basic energy, and simultaneously, the peak regulation function and the heat supply function are also considered.
Along with the improvement of the living standard of residents, the heating demand is gradually increased, and the energy utilization efficiency and the operation flexibility of the whole plant are improved while the demand of electric heating load is met.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a multiunit collaborative combined heat and power generation system to coal-fired generating set moves inflexible problem in peak shaving and heat supply function among the solution prior art.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a multi-unit cooperative cogeneration system comprises units and a heat supply network circulating water pump, wherein a water outlet pipeline of the heat supply network circulating water pump is divided into two branches, the two branches are respectively connected to a cold side working medium inlet of a heat supply condenser and a cold side working medium inlet of a 3# unit condenser, and a cold side working medium outlet of the heat supply condenser and a cold side working medium outlet of the 3# unit condenser are converged to a main pipe;
the main pipe is divided into two branches, one branch is communicated to a cold side working medium inlet of the heat supply network heater, the other branch is communicated to a cold side working medium inlet of the small steam turbine exhaust steam heater, and a cold side working medium outlet of the heat supply network heater and a cold side working medium outlet of the small steam turbine exhaust steam heater are converged into a heat supply network water supply pipeline;
the unit consists of a steam turbine, and a steam exhaust pipeline in the unit is respectively communicated to a heat supply network heater, a small steam turbine of a heat supply network circulating water pump, a heat supply condenser and a 3# unit condenser.
The utility model discloses a further improvement lies in:
preferably, the unit comprises a 1# unit medium pressure turbine, a 1# unit low pressure turbine and a 2# unit medium pressure turbine which are arranged in parallel;
the exhaust steam of the 1# unit medium pressure turbine is respectively connected to the steam inlet of the 1# unit low pressure turbine and the inlet of the first control valve, the exhaust steam of the 2# unit medium pressure turbine is respectively connected to the inlet of the 2# unit low pressure turbine and the inlet of the second control valve, and the exhaust steam of the 3# unit medium pressure turbine is respectively connected to the inlet of the 3# unit low pressure turbine and the inlet of the third control valve;
steam output by the outlet of the first control valve, the outlet of the second control valve and the outlet of the third control valve supplies steam for the small steam turbine of the heat supply network circulating water pump and the heat supply network heater together.
Preferably, the outlet of the first control valve, the outlet of the second control valve and the outlet of the third control valve are connected to a heat supply steam extraction communicating pipe, the outlet of the heat supply steam extraction communicating pipe is divided into two branches, one branch is communicated with the steam inlet of the small turbine of the heat supply network circulating water pump, and the other branch is communicated with the steam inlet of the heat supply network heater.
Preferably, the exhaust pipeline of the low-pressure turbine of the 3# unit is divided into two branches, one branch is communicated with a hot-side working medium inlet of the condenser of the 3# unit, and the other branch is communicated with a hot-side working medium inlet of the heat supply condenser.
Preferably, the steam exhaust pipeline of the small steam turbine of the heat supply network circulating water pump is communicated with a hot side working medium inlet of the steam exhaust heater of the small steam turbine.
Preferably, a hot side working medium outlet of the heat supply network heater and a hot side working medium outlet of the small steam turbine exhaust steam heater are communicated to the heat supply drain tank together.
Preferably, the power output end of the small steam turbine of the heat supply network circulating water pump is connected with the heat supply network circulating water pump.
Preferably, a hot side working medium outlet of the 3# unit condenser and a hot side working medium outlet of the heat supply condenser are connected to the 3# unit deaerator.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a multiunit cooperative combined heat and power generation system. The system adopts Rankine cycle as power cycle, utilizes exhaust steam and extracted steam of the turbine generator unit, and provides two energy sources of heat and electricity for users. The cold source loss and the steam extraction of rational utilization unit, the utility model discloses can increase substantially coal-fired unit's energy utilization. The system divides the backwater heating process of the heat supply network into 2 stages: after the heat supply network circulating water pump is pressurized, the steam enters a 3# unit condenser and a heat supply condenser at first, the exhaust steam of a 2# unit is used for heating, then the exhaust steam is divided into two parts, one part enters a heat supply network heater and is heated by the steam extraction of a steam turbine, the other part enters a small steam turbine exhaust steam heater, the exhaust steam of the small steam turbine of the heat supply network circulating water pump is used for heating, then the exhaust steam is converged, and the heat supply is carried out externally. The system reasonably distributes heating heat sources at different stages, reasonably utilizes the waste heat of the system, and has higher energy utilization rate of the unit; the steam extraction source can be adjusted according to the running condition of the unit, and flexible running of the unit is facilitated. The utility model discloses a high back pressure unit exhaust steam and heat supply are taken out the vapour and are heated the heat supply network return water in proper order, and the cold junction waste heat of rational utilization high back pressure unit has also reduced the partial cold source loss of steam extraction unit, improves energy utilization, can show reduction unit and synthesize the electricity generation coal consumption rate. The utility model discloses a steam turbine is taken out vapour drive heat supply network circulating water pump to be used for heating the heat supply network water with little steam turbine exhaust steam, the pressure and the heat of rational utilization steam turbine extraction steam realize the step utilization of energy, can reduce the electricity generation coal consumption rate of unit. The utility model discloses can adjust the source that the heat supply was taken out vapour in a flexible way, when satisfying the heat supply demand, make 1# unit, 2# unit and 3# unit all can satisfy the demand of nimble operation.
Drawings
FIG. 1 is a system configuration diagram of the present invention;
wherein: the system comprises a 1# unit medium pressure turbine, a 2# unit low pressure turbine, a 3# unit medium pressure turbine, a 4 # unit low pressure turbine, a 5 # unit medium pressure turbine, a 6 # unit low pressure turbine, a 7 # heat supply condenser, a 8 # 3 unit condenser, a 9 # heat supply steam extraction communicating pipe, a 10 # heat supply network heater, a 11 # heat supply network circulating water pump small steam turbine, a 12 # small steam turbine exhaust steam heater, a 13 # heat supply network circulating water pump, a 14 # first control valve, a 15 # second control valve and a 16 # third control valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and encompass, for example, both fixed and removable connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model provides a multiunit collaborative cogeneration system, is including being linked together heat supply network circulating water pump 13 in proper order, heat supply condenser 7 and heat supply network heater 10, still includes 1# unit middling pressure turbine 1, 1# unit low pressure turbine 2, 2# unit middling pressure turbine 3, 2# unit low pressure turbine 4, 3# unit middling pressure turbine 5, 3# unit low pressure turbine 6, 3# unit condenser 8, heat supply extraction communicating pipe 9, heat supply network circulating water pump small steam turbine 11, small steam turbine exhaust steam heater 12, first control valve 14, second control valve 15 and third control valve 16.
A water inlet of a heat supply network circulating water pump 13 is communicated with heat supply network backwater and heat supply network water replenishing simultaneously, a water outlet of the heat supply network circulating water pump 13 is divided into two branches, one branch is communicated with a cold side working medium inlet of a heat supply condenser 7, the other branch is communicated with a 3# unit condenser 8, after a cold side working medium outlet of the heat supply condenser 7 is converged with a cold side working medium outlet of the 3# unit condenser 8, the branches are divided into two branches again, one branch is communicated with the cold side working medium inlet of a heat supply network heater 10, the other branch is connected with the cold side working medium inlet of a small steam turbine exhaust steam heater 12, the cold side working medium outlet of the heat supply network heater 10 is converged with the cold side working medium outlet of the small steam turbine exhaust steam heater 12, and then is communicated with the heat supply network water to supply heat externally. And a working medium outlet at the hot side of the 3# unit condenser 8 and a working medium outlet at the hot side of the heat supply condenser 7 are converged and then are converged into the 3# unit deaerator.
The exhaust steam of the 1# unit medium pressure turbine 1 is respectively communicated with the inlet of the 1# unit low pressure turbine 2 and the inlet of the first control valve 14; the exhaust steam of the 2# unit medium pressure turbine 3 is respectively communicated with the inlet of the 2# unit low pressure turbine 4 and the inlet of the second control valve 15; the exhaust steam of the 3# unit medium pressure turbine 5 is respectively communicated with the inlet of the 3# unit low pressure turbine 6 and the inlet of the third control valve 16; the exhaust steam of the low-pressure turbine 6 of the 3# unit is respectively communicated with a hot side working medium inlet of a condenser 8 of the 3# unit and a hot side working medium inlet of a heat supply condenser 7.
The inlet of the heat supply steam extraction communicating pipe 9 is respectively communicated with the outlet of the first control valve 14, the outlet of the second control valve 15 and the outlet of the third control valve 16, and the outlet of the heat supply steam extraction communicating pipe 9 is respectively communicated with the working medium inlet at the hot side of the heat supply network heater 10 and the inlet of the small steam turbine 11 of the heat supply network circulating water pump.
An inlet of a heat supply network circulating water pump 13 is communicated with heat supply network backwater and heat supply network water replenishing, an outlet of the heat supply network circulating water pump is communicated with a cold side working medium inlet of a 3# unit condenser 8 and a cold side working medium inlet of a heat supply condenser 7, and power of the heat supply network circulating water pump 13 is provided by a small turbine 11 of the heat supply network circulating water pump;
the steam discharging phase of the small steam turbine 11 of the heat supply network circulating water pump is communicated with the hot side working medium inlet of the small steam turbine exhaust steam heater 12, and the hot side working medium outlet of the small steam turbine exhaust steam heater 12 is communicated with the hot side working medium outlet of the heat supply network heater 10 and converged into the heat supply drain box.
The working process of the system is as follows:
the return water of the heat supply network firstly passes through a heat supply network circulating water pump 13 to complete a pressurization process, then is divided into two parts, one part enters a 3# unit condenser 8, the other part enters a heat supply condenser 7, the exhaust steam of a 3# unit low-pressure turbine 6 is used for heating, after heating, a working medium outlet at the cold side of the heat supply condenser 7 is converged, then is divided into two parts again, one part enters a heat supply network heater 10 to be heated by using the extracted steam, the other part enters a small steam turbine exhaust steam heater 12 to be heated by using the exhaust steam of a small steam turbine 11 of the heat supply network circulating water pump, and then is converged to supply heat to the outside; the small steam turbine 11 of the heat supply network circulating water pump is driven by steam extraction to drive the heat supply network circulating water pump 13 to pressurize the return water of the heat supply network.
The return water of the heat supply network is firstly pressurized by 0.4-0.6MPa through a heat supply network circulating water pump 13, then enters a 3# unit condenser 8 and a heat supply condenser 7 and is heated to 60-70 ℃ by the exhaust steam of a 3# unit low-pressure turbine 6 in the 3# unit, the cold side outlet water of the 3# unit condenser 8 and the heat supply condenser 7 is converged and then is divided into two parts, one part is heated through a heat supply network heater 10, the other part is heated through a small steam turbine exhaust steam heater 12, and the temperature of the heat supply outlet is adjusted by adjusting the temperature and the flow of a working medium at the hot side of the heat supply network heater 10, so that the temperature requirements of different heat supply periods are met; the extraction steam of the 1# unit, the 2# unit and the 3# unit can enter the heat supply extraction steam communicating pipe 9, and the source of the heat supply extraction steam can be adjusted according to the operation state of the units through the adjustment of opening and closing the first control valve 14, the second control valve 15 and the third control valve 16, so that the 1# unit, the 2# unit and the 3# unit can meet the requirement of flexible operation while heat load is met.
The power output end of the small steam turbine 11 of the heat supply network circulating water pump is connected with the power input end of the heat supply network circulating water pump 13, power is provided for the operation of the heat supply network circulating water pump 13, and the energy of the whole system is further fully utilized.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The multi-unit cooperative cogeneration system is characterized by comprising a unit and a heat supply network circulating water pump (13), wherein a water outlet pipeline of the heat supply network circulating water pump (13) is divided into two branches, the two branches are respectively connected to a cold side working medium inlet of a heat supply condenser (7) and a cold side working medium inlet of a 3# unit condenser (8), and a cold side working medium outlet of the heat supply condenser (7) and a cold side working medium outlet of the 3# unit condenser (8) are converged to a main pipe;
the main pipe is divided into two branches, one branch is communicated to a cold side working medium inlet of the heat supply network heater (10), the other branch is communicated to a cold side working medium inlet of the small steam turbine exhaust steam heater (12), and a cold side working medium outlet of the heat supply network heater (10) and a cold side working medium outlet of the small steam turbine exhaust steam heater (12) are converged into a heat supply network water supply pipeline;
the unit consists of a steam turbine, and a steam exhaust pipeline in the unit is respectively communicated to a heat supply network heater (10), a heat supply network circulating water pump small steam turbine (11), a heat supply condenser (7) and a 3# unit condenser (8).
2. A multi-unit synergistic cogeneration system according to claim 1, wherein said units comprise a # 1 unit intermediate pressure turbine (1), a # 1 unit low pressure turbine (2) and a # 2 unit intermediate pressure turbine (3) arranged in parallel;
the exhaust steam of the 1# unit medium pressure turbine (1) is connected to the steam inlet of the 1# unit low pressure turbine (2) and the inlet of a first control valve (14) respectively, the exhaust steam of the 2# unit medium pressure turbine (3) is connected to the inlet of the 2# unit low pressure turbine (4) and the inlet of a second control valve (15) respectively, and the exhaust steam of the 3# unit medium pressure turbine (5) is connected to the inlet of the 3# unit low pressure turbine (6) and the inlet of a third control valve (16) respectively;
steam output by the outlet of the first control valve (14), the outlet of the second control valve (15) and the outlet of the third control valve (16) supplies steam for the small steam turbine (11) of the heat supply network circulating water pump and the heat supply network heater (10) together.
3. A multi-unit cooperative cogeneration system according to claim 2, wherein the outlet of the first control valve (14), the outlet of the second control valve (15) and the outlet of the third control valve (16) are commonly connected to the heating steam extraction connection pipe (9), the outlet of the heating steam extraction connection pipe (9) is divided into two branches, one branch is connected to the steam inlet of the heat supply network circulating water pump steam generator (11), and the other branch is connected to the steam inlet of the heat supply network heater (10).
4. A multi-unit cooperative cogeneration system according to claim 2, wherein the exhaust line of the low pressure turbine (6) of the 3# unit is divided into two branches, one branch is communicated with the hot side working medium inlet of the condenser (8) of the 3# unit, and the other branch is communicated with the hot side working medium inlet of the heat supply condenser (7).
5. A multi-unit coordinated combined heat and power generation system as claimed in claim 1, wherein the steam exhaust pipeline of the small steam turbine (11) of the heat network circulating water pump is communicated with the hot side working medium inlet of the exhaust steam heater (12) of the small steam turbine.
6. A multi-unit cooperative cogeneration system according to claim 1, wherein a hot side working medium outlet of the heat supply network heater (10) and a hot side working medium outlet of the small steam turbine exhaust steam heater (12) are commonly communicated to the heat supply steam trap.
7. A multi-unit synergistic cogeneration system according to claim 1, wherein the power output of said heat supply network circulating water pump steam generator (11) is connected with the heat supply network circulating water pump (13).
8. The multi-unit cooperative cogeneration system according to any one of claims 1 to 7, wherein a hot side working medium outlet of the 3# unit condenser (8) and a hot side working medium outlet of the heat supply condenser (7) are connected to the 3# unit deaerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221184345.3U CN217357015U (en) | 2022-05-17 | 2022-05-17 | Multi-unit cooperative combined heat and power generation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221184345.3U CN217357015U (en) | 2022-05-17 | 2022-05-17 | Multi-unit cooperative combined heat and power generation system |
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| CN217357015U true CN217357015U (en) | 2022-09-02 |
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| CN202221184345.3U Active CN217357015U (en) | 2022-05-17 | 2022-05-17 | Multi-unit cooperative combined heat and power generation system |
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- 2022-05-17 CN CN202221184345.3U patent/CN217357015U/en active Active
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