CN106988810A - The multi-stage heating system and method for a kind of waste heat overbottom pressure cascade utilization - Google Patents
The multi-stage heating system and method for a kind of waste heat overbottom pressure cascade utilization Download PDFInfo
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- CN106988810A CN106988810A CN201710271832.0A CN201710271832A CN106988810A CN 106988810 A CN106988810 A CN 106988810A CN 201710271832 A CN201710271832 A CN 201710271832A CN 106988810 A CN106988810 A CN 106988810A
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- heat
- heater
- heat supply
- work
- steam
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 63
- 239000002918 waste heat Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000007789 gas Substances 0.000 claims abstract description 59
- 238000010521 absorption reaction Methods 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 18
- 238000000605 extraction Methods 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 2
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Abstract
The multi-stage heating system and method for a kind of waste heat overbottom pressure cascade utilization, system mainly include work(Hot gas turbine, generator, absorption heat pump, first-degree heating network heater and secondary heat networks heater；The air intake of work(Hot gas turbine is connected with main steam turbine heat supply extraction line, and electrical power generators are driven using part heat supply；Turbine discharge is divided into two, and is partly into absorption heat pump, as the driving steam of heat pump, reclaims the heat energy in low-grade heat source, heats heat supply backwater, hydrophobic return therrmodynamic system of the driving steam after heat pump；Another part enters first-degree heating network heater, further heating heat supply network backwater, and therrmodynamic system is returned after the hydrophobic cold side outflow from first-degree heating network heater of heater；Supplying hot water after being heated through first-degree heating network heater subsequently enters secondary heat networks heater, is sent out after temperature needed for being further heated to, to heat supply；The cold side of secondary heat networks heater is connected with the heat supply extraction line of main steam turbine, and therrmodynamic system is returned after the hydrophobic cold side outflow from secondary heat networks heater of heater.
Description
Technical field
The present invention relates to steam turbine, heat pump and heat supply process field, specifically, more than a kind of waste heat
Press the multi-stage heating system and method for cascade utilization.
Background technology
China's efficiency of energy utilization is relatively low, seriously constrains the economic growth and social progress of China.In face of national energy-saving
The Major Strategic Demand of emission reduction, exploitation high efficiency of energy is utilized and the new technology of low emission is imperative.In cogeneration unit,
In order to improve energy utilization rate, the cascade utilization of energy is realized, it is general to use main steam turbine extraction for heat supply.But, with main vapour
The parameter more and more higher of turbine operation, the pressure and temperature that main steam turbine heat supply is drawn gas is often higher than the demand of heating system, directly
Connect the significant wastage for supplying water and being heated energy is caused to heat supply network.
Meanwhile, it is special there is also substantial amounts of waste heat in the industries such as the electric power of highly energy-consuming, steel, cement, glass
It is not that less than 100 DEG C of low-grade heat source waste heat is effectively utilized, such as exhaust steam in steam turbine, industrial circulating cooling water, boiler emission tail
Gas etc., this also result in relatively low and the energy the waste of energy utilization efficiency.
The content of the invention
In order to solve the above problems, efficiency of energy utilization is improved, reduces energy waste, increases thermal power plant unit efficiency, is improved
Economic benefit, reduces coal consumption, realizes the cascade utilization of energy, add the invention provides a kind of multistage of waste heat overbottom pressure cascade utilization
Hot systems and method, main steam turbine is drawn gas and is divided into two-way, and point two-way after work(Hot gas turbine generates electricity is passed through all the way, reaches that three-level adds
The purpose of heat.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of multi-stage heating system of waste heat overbottom pressure cascade utilization, including work(Hot gas turbine 1, its air intake and main steam turbine
Heat supply extraction line is connected；Absorption heat pump 3, the steam discharge of the driving steam inlet connection work(Hot gas turbine 1 of absorption heat pump 3
Mouthful, the part steam discharge of work(Hot gas turbine 1 is as the driving steam of absorption heat pump 3, and the thermal source inlet connection of absorption heat pump 3 is low
Grade thermal source 4, reclaims the heat energy in low-grade heat source 4, heats heat supply backwater, the hydrophobic outlet connection heating power of absorption heat pump 3
System；First-degree heating network heater 5, its heat supply network water inlet connects the heat supply network water out of absorption heat pump 3, first-degree heating network heater 5
Cold side be connected with the steam drain of work(Hot gas turbine 1, further heat hot net water, the hydrophobic outlet of first-degree heating network heater 5
Connect therrmodynamic system；Secondary heat networks heater 6, the heat supply network water out of its heat supply network water inlet connection first-degree heating network heater 5, two grades
The cold side of heat exchangers for district heating 6 is connected with main steam turbine heat supply extraction line, and hot net water, secondary heat networks heater 6 are heated again
Hydrophobic outlet connection therrmodynamic system；The heat supply of main steam turbine is drawn gas and is divided into two, is generated electricity all the way into work(Hot gas turbine 1,
The steam discharge of work(Hot gas turbine 1 is divided into two again, all the way as the driving heat source of absorption heat pump 3, reclaims in low-grade heat source 4
Heat energy, heat heat supply backwater；Another road is directly entered first-degree heating network heater 5, to the confession after the heating of absorption heat pump 3
Hot backwater is heated again；The second road steam that main steam turbine heat supply is drawn gas is directly entered secondary heat networks heater 6, to passing through one-level
Heat supply backwater after heat exchangers for district heating 5 is heated is heated again, it is achieved thereby that overbottom pressure UTILIZATION OF VESIDUAL HEAT IN that part heat supply is drawn gas and low
The UTILIZATION OF VESIDUAL HEAT IN of grade thermal source, improves economic benefit.
The work(Hot gas turbine 1 is back pressure turbine, and work(Hot gas turbine 1 drives energy conversion device 2 by shaft coupling,
Externally export energy.
The energy conversion device 2 is synchronous generator, asynchronous generator, pump, blower fan or compressor.
In order to meet the driving steam parameter demand of absorption heat pump 3, between work(Hot gas turbine 1 and absorption heat pump 3
Temperature-decreased pressure reducer 9 is installed, is easy to that steam parameter is adjusted.
The low-grade heat source 4 is exhaust steam in steam turbine, recirculated cooling water or boiler smoke.
Is provided with the pipeline that the cold side of the first-degree heating network heater 5 is connected with the steam drain of work(Hot gas turbine 1
One choke valve 7, to control the parameter of drawing gas into first-degree heating network heater 5.
Second throttle 8 is installed between the cold side and main steam turbine heat supply extraction line of the secondary heat networks heater 6,
To control the parameter of drawing gas into secondary heat networks heater 6.
The Multi-stage heating method of the multi-stage heating system of described waste heat overbottom pressure cascade utilization, a part of main steam turbine heat supply
Draw gas into work(Hot gas turbine 1, work(Hot gas turbine 1 drives energy conversion device 2 to generate electricity by shaft coupling；Work(Hot gas turbine part
Steam discharge is connected through pipeline with absorption heat pump 3, as the driving vapour source of absorption heat pump 3, from the hydrophobic of the outflow of absorption heat pump 3
Return to therrmodynamic system；Absorption heat pump 3 reclaims the heat energy in low-grade heat source 4, heats heat supply backwater；Heat supply backwater after heating
First-degree heating network heater 5 is subsequently entered, the cold side of first-degree heating network heater 5 is connected with the steam outlet pipe road of work(Hot gas turbine 1, used
To heat heat supply network water supply, the hydrophobic return therrmodynamic system of first-degree heating network heater 5；The confession heated by first-degree heating network heater 5
Hot backwater subsequently enters secondary heat networks heater 6, cold side and the main steam turbine heat supply extraction line phase of secondary heat networks heater 6
Even, supplied water to heat heat supply network, the hydrophobic return therrmodynamic system of heater.Compared with prior art, beneficial effects of the present invention
It is：
1st, efficiency of energy utilization is improved, increases thermal power plant unit generated energy, economic benefit is lifted, effects of energy saving and emission reduction is obvious.
2nd, the simple and compact for structure of whole device, cost are low.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
In figure, 1 is work(Hot gas turbine, and 2 be energy conversion device, and 3 be absorption heat pump, and 4 be low-grade heat source, and 5 be one
Level heat exchangers for district heating, 6 be secondary heat networks heater, and 7 be first throttle valve, and 8 be second throttle, and 9 be temperature-decreased pressure reducer, and 10 are
Pumps for hot water supply net.
Embodiment
Describe embodiments of the present invention in detail with reference to the accompanying drawings and examples.
Shown in figure Fig. 1, a kind of multi-stage heating system of waste heat overbottom pressure cascade utilization of the present embodiment, a part of heat supply draw gas into
Enter work(Hot gas turbine 1, work(Hot gas turbine 1 is back pressure turbine, and Generation of induction motor is driven by shaft coupling.Work(Hot gas turbine
1 part steam discharge is connected through pipeline with absorption heat pump 3, as the driving vapour source of absorption heat pump 3, is flowed out from absorption heat pump 3
Hydrophobic return therrmodynamic system.Between work(Hot gas turbine 1 and absorption heat pump 3, temperature-decreased pressure reducer 9 can be installed, be easy to adjust
The parameter of section driving steam, to meet the requirements of one's work of absorption heat pump 3.Absorption heat pump 3 is the kind absorption type of lithium bromide first
Heat pump, reclaims the heat energy in low-grade heat source 4, heats heat supply backwater.Heat supply backwater after heating subsequently enters first-degree heating network and added
Hot device 5, the cold side of first-degree heating network heater 5 is connected with the steam outlet pipe road of work(Hot gas turbine 1, is supplied water to heat heat supply network, and one
The hydrophobic return therrmodynamic system of level heat exchangers for district heating 5.Go out vapour in cold side and the work(Hot gas turbine 1 of first-degree heating network heater 5
Pipeline enclosure is provided with first throttle valve 7, to control the parameter of drawing gas into first-degree heating network heater 5.By first-degree heating network plus
The heat supply backwater that hot device 5 is heated subsequently enters secondary heat networks heater 6, the cold side and main steam turbine of secondary heat networks heater 6
Heat supply extraction line is connected, and is supplied water to heat heat supply network, the hydrophobic return therrmodynamic system of heater.In secondary heat networks heater 6
Cold side and main steam turbine heat supply extraction line between second throttle 8 is installed, to control enter secondary heat networks heater 6
Parameter of drawing gas.
The operation principle of the present invention is as follows：The present invention, which draws gas the heat supply of main steam turbine, to be divided into two, all the way into work(heat
Steam turbine 1 generates electricity, and the steam discharge of work(Hot gas turbine 1 is divided into two again, all the way as the driving heat source of absorption heat pump 3, reclaims
Heat energy in low-grade heat source 4, heats heat supply backwater；Another road is directly entered first-degree heating network heater 5, to passing through absorption type heat
Heat supply backwater after pump 3 is heated is heated again.The second road steam that main steam turbine heat supply is drawn gas is directly entered secondary heat networks heating
Device 6, to by first-degree heating network heater 5 heating after heat supply backwater heat again, it is achieved thereby that part heat supply draw gas it is remaining
Discard heat utilization and the UTILIZATION OF VESIDUAL HEAT IN of low-grade heat source, improve economic benefit.
Claims (8)
1. a kind of multi-stage heating system of waste heat overbottom pressure cascade utilization, it is characterised in that including work(Hot gas turbine (1), it enters vapour
Mouth is connected with main steam turbine heat supply extraction line；Absorption heat pump (3), the driving steam inlet connection work(of absorption heat pump (3)
The steam drain of Hot gas turbine (1), the part steam discharge of work(Hot gas turbine (1) as absorption heat pump (3) driving steam, it is absorption
The thermal source inlet connection low-grade heat source (4) of heat pump (3), reclaims the heat energy in low-grade heat source (4), heats heat supply backwater, inhales
The hydrophobic outlet connection therrmodynamic system of receipts formula heat pump (3)；First-degree heating network heater (5), its heat supply network water inlet connection absorption type heat
The heat supply network water out of pump (3), the cold side of first-degree heating network heater (5) is connected with the steam drain of work(Hot gas turbine (1), further
Heat hot net water, the hydrophobic outlet connection therrmodynamic system of first-degree heating network heater (5)；Secondary heat networks heater (6), its hot net water
The heat supply network water out of entrance connection first-degree heating network heater (5), cold side and the main steam turbine heat supply of secondary heat networks heater (6)
Extraction line is connected, and hot net water, the hydrophobic outlet connection therrmodynamic system of secondary heat networks heater (6) are heated again；By main steamer
The heat supply of machine, which is drawn gas, to be divided into two, and is generated electricity all the way into work(Hot gas turbine (1), and the steam discharge of work(Hot gas turbine (1) is for one point again
Two, all the way as the driving heat source of absorption heat pump (3), the heat energy in low-grade heat source (4) is reclaimed, heat supply backwater is heated；Separately
First-degree heating network heater (5) is directly entered all the way, and the heat supply backwater after absorption heat pump (3) heating is heated again；It is main
The second road steam that steam turbine heat supply is drawn gas is directly entered secondary heat networks heater (6), to adding by first-degree heating network heater (5)
Heat supply backwater after heat is heated again, it is achieved thereby that overbottom pressure UTILIZATION OF VESIDUAL HEAT IN and the waste heat of low-grade heat source that part heat supply is drawn gas
Utilize, improve economic benefit.
2. the multi-stage heating system of waste heat overbottom pressure cascade utilization according to claim 1, it is characterised in that the work(hot vapour
Turbine (1) is back pressure turbine, and work(Hot gas turbine (1) drives energy conversion device (2) by shaft coupling, externally exports energy
Amount.
3. the multi-stage heating system of the waste heat overbottom pressure cascade utilization according to right 2, it is characterised in that the energy converting means
(2) are put for synchronous generator, asynchronous generator, pump, blower fan or compressor.
4. the multi-stage heating system of waste heat overbottom pressure cascade utilization according to claim 1, it is characterised in that in order to meet suction
The driving steam parameter demand of receipts formula heat pump (3), pressure and temperature reducing is installed between work(Hot gas turbine (1) and absorption heat pump (3)
Device (9), is easy to that steam parameter is adjusted.
5. the multi-stage heating system of waste heat overbottom pressure cascade utilization according to claim 1, it is characterised in that described low-grade
Thermal source (4) is exhaust steam in steam turbine, recirculated cooling water or boiler smoke.
6. the multi-stage heating system of waste heat overbottom pressure cascade utilization according to claim 1, it is characterised in that the one-level heat
First throttle valve (7) is installed on the pipeline that the cold side of net heater (5) is connected with the steam drain of work(Hot gas turbine (1), used
To control the parameter of drawing gas for entering first-degree heating network heater (5).
7. the multi-stage heating system of waste heat overbottom pressure cascade utilization according to claim 1, it is characterised in that two grades of heat
Second throttle (8) is installed between the cold side and main steam turbine heat supply extraction line of net heater (6)), to control to enter
The parameter of drawing gas of secondary heat networks heater (6).
8. the Multi-stage heating method of the multi-stage heating system of the waste heat overbottom pressure cascade utilization described in any one of claim 1 to 7, its
It is characterised by, a part of main steam turbine heat supply is drawn gas into work(Hot gas turbine (1), and work(Hot gas turbine (1) is driven by shaft coupling
Energy conversion device (2) generates electricity；Work(Hot gas turbine part steam discharge is connected through pipeline with absorption heat pump (3), is used as absorption type heat
The driving vapour source of pump (3), the hydrophobic return therrmodynamic system flowed out from absorption heat pump (3)；Absorption heat pump (3) reclaims low-grade
Heat energy in thermal source (4), heats heat supply backwater；Heat supply backwater after heating subsequently enters first-degree heating network heater (5), one-level heat
The cold side of net heater (5) is connected with the steam outlet pipe road of work(Hot gas turbine (1), is supplied water to heat heat supply network, first-degree heating network adds
The hydrophobic return therrmodynamic system of hot device (5)；The heat supply backwater heated by first-degree heating network heater (5) subsequently enters secondary heat networks
Heater (6), the cold side of secondary heat networks heater (6) is connected with main steam turbine heat supply extraction line, is supplied to heat heat supply network
Water, the hydrophobic return therrmodynamic system of heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710271832.0A CN106988810A (en) | 2017-04-24 | 2017-04-24 | The multi-stage heating system and method for a kind of waste heat overbottom pressure cascade utilization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710271832.0A CN106988810A (en) | 2017-04-24 | 2017-04-24 | The multi-stage heating system and method for a kind of waste heat overbottom pressure cascade utilization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106988810A true CN106988810A (en) | 2017-07-28 |
Family
ID=59417037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710271832.0A Pending CN106988810A (en) | 2017-04-24 | 2017-04-24 | The multi-stage heating system and method for a kind of waste heat overbottom pressure cascade utilization |
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| Country | Link |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339877A (en) * | 2018-10-25 | 2019-02-15 | 中国能源建设集团陕西省电力设计院有限公司 | A kind of coal base distributing-supplying-energy system |
| CN109441552A (en) * | 2018-09-10 | 2019-03-08 | 东方电气集团东方汽轮机有限公司 | A kind of overbottom pressure utilizes system using steam turbine and overbottom pressure |
| CN110454248A (en) * | 2019-07-23 | 2019-11-15 | 上海发电设备成套设计研究院有限责任公司 | A kind of heating steam pressurizing transmission system |
| CN113218217A (en) * | 2021-06-09 | 2021-08-06 | 西安热工研究院有限公司 | Energy cascade utilization system |
| CN115264565A (en) * | 2022-07-25 | 2022-11-01 | 西安西热节能技术有限公司 | Low-pressure cylinder zero-output unit waste heat deep recovery optimized heating system |
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Application publication date: 20170728 |