CN109026225A - A kind of unit extraction for heat supply cascaded utilization of energy method - Google Patents
A kind of unit extraction for heat supply cascaded utilization of energy method Download PDFInfo
- Publication number
- CN109026225A CN109026225A CN201810945621.5A CN201810945621A CN109026225A CN 109026225 A CN109026225 A CN 109026225A CN 201810945621 A CN201810945621 A CN 201810945621A CN 109026225 A CN109026225 A CN 109026225A
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- heat supply
- energy
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- steam
- supply network
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a kind of unit extraction for heat supply cascaded utilization of energy methods, and based on heating heat supply network, which includes back pressure generating set and water circulating pump steam turbine, and unit steam extraction is at least divided into two-way, and the amount of each road unit steam extraction is exported by step；The heat energy utilization back pressure generating set that each road unit steam extraction carries carries out energy and is converted into electric energy, which is put into heating heat supply network and uses or input power grid；The energy utilized water circulating pump steam turbine acting that each road unit steam extraction carries, by kinetic energy conversion thermal energy.After method of the invention, it is recycled all kinetic energy of unit steam extraction and thermal energy all, the electric energy of recycling can increase the electricity volume in power plant, and step is simple, and it is easy to implement, it is at low cost.
Description
Technical field
The present invention relates to heating system technical field more particularly to a kind of unit extraction for heat supply cascaded utilization of energy methods.
Background technique
Currently, large-sized unit extraction for heat supply steam is frequently with intermediate pressure cylinder steam extraction, steam extraction parameter is relatively high, pressure 0.4~
1.0MPa, 370 DEG C of temperature.In general, heating steam is heated after steam extraction pressure and temperature reducing, into Gateway Station in Heating Network by heat exchangers for district heating
Heat supply network recirculated water.Because steam parameter is relatively high, if being directly used in heat supply, cause the kinetic energy of high-quality steam cannot be abundant
It utilizes, there are the lower drawbacks of comprehensive utilization of energy rate.
Summary of the invention
In view of the above deficiencies, the object of the present invention is to provide a kind of unit extraction for heat supply cascaded utilization of energy methods, use
The kinetic energy and thermal energy that steam is taken full advantage of after this method, have also recycled electric energy, increase the electricity volume in power plant, step letter
It is single, it is easy to implement.
To achieve the above object, the technical scheme is that
A kind of unit extraction for heat supply cascaded utilization of energy method, based on heating heat supply network, the heating heat supply network includes back pressure generator
Group and water circulating pump steam turbine, unit steam extraction are at least divided into two-way, and the amount of unit steam extraction described in each road is exported by step；
Back pressure generating set described in the heat energy utilization that unit steam extraction described in each road carries carries out energy and is converted into electric energy, the electric energy quilt
It puts into the heating heat supply network and uses or input power grid；
The heat energy utilization water circulating pump steam turbine acting that unit steam extraction described in each road carries, converts thermal energy into kinetic energy acting.
Preferred embodiment is that the energy that unit steam extraction carries carries out energy conversion in a heat supply network circuit of heating heat supply network,
Or energy conversion is carried out between two or more circuits.
Preferred embodiment is that the unit steam extraction is divided into three tunnels,
The first via enters the back pressure generating set, which directly send after back pressure generating set pressure and temperature reducing
Enter front end processor steam exhaust heat exchangers for district heating and removes heat cycles water；The back pressure generating set carries out pressure and temperature reducing processing to unit steam extraction
When, the thermal energy of the road unit steam extraction is converted into electric energy；
Second tunnel enters the water circulating pump steam turbine acting of the heating heat supply network, is done work using thermal energy；
Third road enters the heat supply network oxygen-eliminating device of the heating heat supply network, supplements water progress deoxygenation by heating heat supply network and is utilized.
Preferred embodiment is that first via unit steam extraction accounts for the 88% of total amount, is suitble to after back pressure generating set pressure and temperature reducing
The heat supply steam of heat supply, the parameter of heat supply steam are pressure 0.3MPa, 240 DEG C of temperature, before which enters
Set machine steam exhaust heat exchangers for district heating heat cycles water.
Preferred embodiment is that the second road unit steam extraction accounts for the 11% of total amount, enters after the acting of steam-operating water circulating pump steam turbine and follows
Pumping steam exhaust heater, steam parameter after acting is pressure 0.3MPa, 240 DEG C of temperature, into heater heat cycles water.
Preferred embodiment is that the unit steam extraction of third road accounts for the 1% of total amount, and the heat supply network oxygen-eliminating device of the heating heat supply network passes through heating
Heat supply network supplement water carries out deoxygenation and is utilized.
Preferred embodiment is that the heating heat supply network further includes the circulating water strainer and drain recovery being serially connected in heating heat supply network
With frequency conversion condensate pump；
The method, further includes:
Wherein, the steam residue thermal energy that the 4th tunnel enters the heating equipment is recycled by frequency conversion condensate pump.
After adopting the above technical scheme, the beneficial effects of the present invention are:
Due to unit extraction for heat supply cascaded utilization of energy method of the invention, based on heating heat supply network, which includes back pressure
Generating set and water circulating pump steam turbine, unit steam extraction are at least divided into two-way, and the amount of each road unit steam extraction is exported by step；Each road
The heat energy utilization back pressure generating set that unit steam extraction carries carries out energy and is converted into electric energy, which is put into heating heat supply network and uses
Or input power grid；The heat energy utilization water circulating pump steam turbine acting that each road unit steam extraction carries, converts thermal energy into kinetic energy acting.
After method of the invention, it is recycled all kinetic energy of unit steam extraction and thermal energy all, the electric energy of recycling can increase
The electricity volume in power plant, step is simple, easy to implement, at low cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of unit extraction for heat supply cascaded utilization of energy method in the present invention；
In figure: 1- unit steam extraction, 2- back pressure generating set, 3- front end processor steam exhaust heat exchangers for district heating, 4- water circulating pump steam turbine.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1, a kind of unit extraction for heat supply cascaded utilization of energy method, based on heating heat supply network, heating heat supply network includes
Back pressure generating set and water circulating pump steam turbine, unit steam extraction are at least divided into two-way, and the amount of each road unit steam extraction is exported by step；
The heat energy utilization back pressure generating set that each road unit steam extraction carries carries out energy and is converted into electric energy, which is put into heating
Heat supply network uses or input power grid；
The heat energy utilization water circulating pump steam turbine acting that each road unit steam extraction carries, converts thermal energy into kinetic energy acting.
As shown in Figure 1, the energy that unit steam extraction carries carries out energy conversion in a heat supply network circuit of heating heat supply network, or
Energy conversion is carried out between two or more circuits.
In the present embodiment, unit steam extraction is divided into three tunnels,
The first via enters back pressure generating set 2, which is sent directly into after 2 pressure and temperature reducing of back pressure generating set
Front end processor steam exhaust heat exchangers for district heating removes heat cycles water；It, will when back pressure generating set 2 carries out pressure and temperature reducing processing to unit steam extraction
The thermal energy of the road unit steam extraction 1 is converted into electric energy.Specific: first via unit steam extraction accounts for the 88% of total amount, through back pressure generating set
The heat supply steam for being suitble to heat supply is obtained after 2 pressure and temperature reducings, the parameter of heat supply steam is pressure 0.3MPa, 240 DEG C of temperature,
The heat supply steam enters 3 heat cycles water of front end processor steam exhaust heat exchangers for district heating.
The water circulating pump steam turbine 4 that second tunnel enters heating heat supply network does work, and is done work using kinetic energy.It is specific: No. second machine
Group steam extraction 1 accounts for the 11% of total amount, enters after the acting of steam-operating water circulating pump steam turbine 4 and follows pump steam exhaust heater, the steam after acting
Parameter be pressure 0.3MPa, 240 DEG C of temperature, into heater heat cycles water.
Third road enters the heat supply network oxygen-eliminating device of heating heat supply network, is utilized by energy conversion.Specifically, third road unit is taken out
Vapour 1 accounts for the 1% of total amount, the heat supply network oxygen-eliminating device for the heat supply network that heats, and supplements water progress deoxygenation by heating heat supply network and is utilized.
Unit steam extraction 1 carry energy heating heat supply network a heat supply network circuit in carry out energy conversion, or two with
Energy conversion is carried out between upper circuit.
Heating heat supply network in this example further includes the circulating water strainer and frequency conversion condensate pump being serially connected in heating heat supply network；That
Method of the invention, further includes:
Wherein, the steam residue thermal energy that the 4th tunnel enters the heating equipment is recycled by frequency conversion condensate pump.
For example:
As shown in Figure 1, calculating according to a 600MW unit steam extraction intermediate pressure cylinder heating steam extraction 600t/h, there is the entrance of 529t/h steam
The power generation of back pressure generating set, generated energy is about 30MW, has the steam of 64t/h to enter the acting of water circulating pump driving steam turbine, there is 7t/
H hours steam enters the utilization of heat supply network oxygen-eliminating device, and all unit steam extraction kinetic energy and thermal energy all recycle.
As it can be seen that can make full use of the kinetic energy and thermal energy compared with high parameter steam, the electricity of recycling after using method of the invention
It can increase the electricity volume in power plant, step is simple, easy to implement.
Claims (7)
1. a kind of unit extraction for heat supply cascaded utilization of energy method, based on heating heat supply network, the heating heat supply network includes back pressure power generation
Unit and water circulating pump steam turbine, which is characterized in that unit steam extraction is at least divided into two-way, and the amount of unit steam extraction described in each road is by ladder
Grade output；
Back pressure generating set described in the heat energy utilization that unit steam extraction described in each road carries carries out energy and is converted into electric energy, the electric energy quilt
It puts into the heating heat supply network and uses or input power grid；
The heat energy utilization water circulating pump steam turbine acting that unit steam extraction described in each road carries, converting thermal energy into kinetic energy is function.
2. the unit extraction for heat supply cascaded utilization of energy method according to claim 1, which is characterized in that unit steam extraction is taken
The energy of band carries out energy conversion in a heat supply network circuit of heating heat supply network, or carries out energy between two or more circuits and turn
It changes.
3. the unit extraction for heat supply cascaded utilization of energy method according to claim 1, which is characterized in that the unit is taken out
Vapour is divided into three tunnels,
The first via enters the back pressure generating set, which directly send after back pressure generating set pressure and temperature reducing
Enter front end processor steam exhaust heat exchangers for district heating and removes heat cycles water；The back pressure generating set carries out pressure and temperature reducing processing to unit steam extraction
When, the thermal energy of the road unit steam extraction is converted into electric energy；
Second tunnel enters the water circulating pump steam turbine acting of the heating heat supply network, is converted into kinetic energy using thermal energy and does work；
Third road enters the heat supply network oxygen-eliminating device of the heating heat supply network, supplements water by heating heat supply network and is utilized.
4. unit extraction for heat supply cascaded utilization of energy method according to claim 3, which is characterized in that first via unit is taken out
Vapour accounts for the 88% of total amount, and the heat supply steam for being suitble to heat supply is obtained after back pressure generating set pressure and temperature reducing, the heat supply steam
Parameter is pressure 0.3MPa, and 240 DEG C of temperature, which enters front end processor steam exhaust heat exchangers for district heating heat cycles water.
5. unit extraction for heat supply cascaded utilization of energy method according to claim 3, which is characterized in that the second road unit is taken out
Vapour accounts for the 11% of total amount, enters after the acting of steam-operating water circulating pump steam turbine and follows pump steam exhaust heater, and the steam parameter after acting is
Pressure 0.3MPa, 240 DEG C of temperature, into heater heat cycles water.
6. unit extraction for heat supply cascaded utilization of energy method according to claim 3, which is characterized in that third road unit is taken out
Vapour accounts for the 1% of total amount, and the heat supply network oxygen-eliminating device of the heating heat supply network supplements water by heating heat supply network and is utilized.
7. unit extraction for heat supply cascaded utilization of energy method according to claim 3, which is characterized in that the heating heat supply network
It further include the circulating water strainer and drain recovery frequency conversion condensate pump being serially connected in heating heat supply network；
The method, further includes:
Wherein, the steam residue thermal energy that the 4th tunnel enters the heating equipment is recycled by frequency conversion condensate pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810945621.5A CN109026225A (en) | 2018-08-20 | 2018-08-20 | A kind of unit extraction for heat supply cascaded utilization of energy method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810945621.5A CN109026225A (en) | 2018-08-20 | 2018-08-20 | A kind of unit extraction for heat supply cascaded utilization of energy method |
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| CN109026225A true CN109026225A (en) | 2018-12-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005488A (en) * | 2019-02-22 | 2019-07-12 | 华电电力科学研究院有限公司 | A kind of high back pressure energy saving in heating system optimization method |
-
2018
- 2018-08-20 CN CN201810945621.5A patent/CN109026225A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005488A (en) * | 2019-02-22 | 2019-07-12 | 华电电力科学研究院有限公司 | A kind of high back pressure energy saving in heating system optimization method |
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