CN105737123B - Blast furnace gas distributed energy resource system - Google Patents
Blast furnace gas distributed energy resource system Download PDFInfo
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- CN105737123B CN105737123B CN201610240711.5A CN201610240711A CN105737123B CN 105737123 B CN105737123 B CN 105737123B CN 201610240711 A CN201610240711 A CN 201610240711A CN 105737123 B CN105737123 B CN 105737123B
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- furnace gas
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- steam
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 137
- 239000007789 gas Substances 0.000 claims abstract description 67
- 238000010521 absorption reaction Methods 0.000 claims abstract description 19
- 238000005057 refrigeration Methods 0.000 claims abstract description 14
- 239000003517 fume Substances 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000001172 regenerating effect Effects 0.000 claims description 5
- 239000003245 coal Substances 0.000 claims description 4
- 210000004907 gland Anatomy 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 2
- 238000009833 condensation Methods 0.000 claims description 2
- 238000007710 freezing Methods 0.000 claims 1
- 230000008014 freezing Effects 0.000 claims 1
- 239000000446 fuel Substances 0.000 abstract description 5
- 230000006872 improvement Effects 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 9
- 239000003546 flue gas Substances 0.000 description 9
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000003303 reheating Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/183—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines in combination with metallurgical converter installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
-
- 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
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
- Y02B30/625—Absorption based systems combined with heat or power generation [CHP], e.g. trigeneration
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Abstract
The present invention discloses a kind of blast furnace gas distributed energy resource system, mainly optimizes layout by the energy source user to blast furnace ironmaking region, and joint supply is carried out to the various energy resources such as hot and cold, electric, work(form by fuel of blast furnace gas.The steam that the blast furnace gas boiler of blast furnace gas distributed energy resource system of the present invention is produced first passes through the acting of back pressure steam turbine drive blast furnace blower, then driving condensing turbine drives generator operation output electric energy, drives hot water operated absorption refrigerating machine to organize work while further recycling output thermal source to blast furnace gas boiler fume afterheat progress step and provides low-temperature receiver for refrigeration consumer.Blast furnace gas distributed energy resource system of the present invention realizes the performance improvement of systems thermodynamics, improves the comprehensive utilization rate of energy source of system.
Description
Technical field
The present invention relates to a kind of blast furnace gas distributed energy resource system.
Background technology
" energy, environment, development " is three big themes of face of mankind nowadays, and the rational exploitation and use of the energy is environment friend
The important guarantee of good and human kind sustainable development.In the rapid economic development in past more than 30 years, the energy resource structure based on coal
Caused environmental pollution and ecological problem cause immense pressure to the sustainable development of China.Coal is in exploitation, transport
With the destruction to land resource, destruction and atmosphere pollution to water resource can be caused using link.How energy-consuming knot is improved
Structure, it is to realize the key issue that the strategy of sustainable development is faced that environmental pollution is reduced to greatest extent.
For reply Global climate change, China plan to the year two thousand twenty unit GDP CO2 emission than
Decline within 2005Wherein the contribution rate of Energy Conservation high energy efficiency will reach more than 85%, and this also gives energy-saving and emission-reduction band
Huge challenge is carried out.
In today of energy supply growing tension, it is energy-saving, rationally using resource, improve efficiency of energy utilization and turned into
People's question of common concern, is also the fundamental way of China's energy development.In order to improve efficiency of energy utilization, in the urgent need to inciting somebody to action
Electric and low-quality hot and cold three kinds of energy requirement organic unities of high-quality, cool and thermal power distributed energy resource system is exactly in the energy
A kind of Optimum utilization ways of the raising efficiency of energy utilization emerged in structural adjustment, it is mounted in the efficient of user terminal
Cooling heating and power generation system, is the modern energy method of supplying for realizing energy supply nearby in load center.
Distributed energy energy comprehensive utilization ratio reachesFractional energy savings reachesRealize
Science can meet energy-conserving and environment-protective and requirement of building a conservation-minded society with energy cascade utilization.Distributed energy is to solve China
Energy and environment problem, the important technology approach for carrying forward vigorously energy-saving and emission-reduction and science energy, it has concurrently, and energy efficiency is high, pacify
Entirely, economic, environment-friendly the features such as, be the key technology for building future new era energy resource system.
Steel and iron industry is one of basic industry of China, is mainstay of the national economy industry, it is in whole national economy
In play very important effect.Steel and iron industry production procedure is a huge, complicated energy circulatory system, in the system
In each production process, there is substantial amounts of energy demand user, and these users exist with can it is big, with can condition it is uneven,
The features such as user's point disperses.For a long time, steel plant always with the optimization and upgrading of each production technology in itself, process equipment capacity and
Scale is promoted to Major Developmental Objectives, for heat integration attention degree well below other industrial circles, cause
The significant waste of steel industry using energy source, or even have impact on the development and progress speed of steel and iron industry.Therefore, for steel
Each production process of factory with that can carry out Conformity planning, build a set of rational distributed energy and utilize system, with important warp
Benefit of helping and social value.
In smelting iron and steel flow, substantial amounts of by-product gas, including blast furnace gas, coal gas of converter and coke-oven coal can be produced
Gas.Wherein, the yield of blast furnace gas is maximum, but is due to that blast furnace gas calorific value is low, steel plant to the utilization of blast furnace gas not
Fully.At present, steel plant generally add the pattern of Turbo-generator Set to utilize blast furnace gas using blast furnace gas boiler, but this
The comprehensive utilization rate of energy source of the pattern of kind only has 35% or so, accessible with NG Distributed Energy SystemThere is very big gap in comprehensive utilization ratio, if steel mill's energy situation can be combined, according to " distribution according to need, energy
The a set of distributed energy resource system based on blast furnace gas of principle construction of counterpart, cascade utilization ", realizes that science can, optimize and uses
Can, considerable income can be necessarily produced, is that structural adjustment, the optimization and upgrading of steel and iron industry produce important impetus.
The content of the invention
Present invention offer is a kind of can to realize energy cascade utilization and many to cold and hot electric work etc. based on blast furnace gas
Plant the blast furnace gas distributed energy resource system that energy form carries out joint supply.
It is described to reach above-mentioned purpose, a kind of blast furnace gas distributed energy resource system of the invention, including blast furnace gas boiler
The steam (vapor) outlet of blast furnace gas boiler is sequentially connected by jet chimney is provided with back pressure turbine, condensing turbine, institute
One-level gas-water heat exchanger, secondary smoke-water- to-water heat exchanger are disposed with the back-end ductwork for stating blast furnace gas boiler；
Wherein, the back pressure turbine is coaxially connected with blast furnace blower, high described in the back pressure steam turbine drive
Stove air blast is done work；The condensing turbine is connected with generator coaxle, and the condensing turbine drives the generator
Generate electricity；
The condensing turbine is connected by blow-off line with condenser, and the condenser adds with condensate pump, axle envelope
Hot device, low-pressure heater are sequentially connected in series and connected along condensing Water flow-path in thermodynamic system of steam tur, the low-pressure heater it is solidifying
Outlet is born water with the next stage bleeder heater of Steam Turbine Regenerative System to be connected；The water side of the secondary smoke-water- to-water heat exchanger is entered
Mouth and water side outlet are connected with the incoming condensing water pipeline and outlet condensing water conduit of the low-pressure heater respectively；
What the water side-entrance of the one-level gas-water heat exchanger and water side outlet were organized with hot water operated absorption refrigerating machine respectively
Hot water outlet is connected with hot water inlet, wherein, the water side outlet of the one-level gas-water heat exchanger separates branch pipe all the way and office
It is connected with workshop heating user；
The chilled water import and chilled water outlet of hot water operated absorption refrigerating machine group respectively with air dehumidifying device
Chilled water outlet is connected with chilled water import, the chilled water outlet of hot water operated absorption refrigerating machine group separate all the way branch pipe with
Office is connected with workshop refrigeration consumer.
Further, it is provided with reheating on the jet chimney between the back pressure turbine and the condensing turbine
Device.
Further, the hot water connecting tube that the one-level gas-water heat exchanger is organized with the hot water operated absorption refrigerating machine
First circulation water pump is provided with road, hot water operated absorption refrigerating machine's group is connected with the chilled water of the air dehumidifying device
Second circulation water pump is provided with pipeline.
Further, it is provided between the steam inlet of the back pressure turbine and outlet by back pressure turbine steam
The first reducing-and-cooling plant is provided with road, the back pressure turbine steam by-pass；
Condensing turbine steam by-pass is provided between the steam inlet of the condensing turbine and outlet, it is described solidifying
The second reducing-and-cooling plant is provided with the bypass of vapour formula steam-turbine.
Further, the air dehumidifying device is connected by air duct with the blast furnace blower, the blast furnace drum
The air outlet slit of blower fan is connected by pipeline with blast funnace hot blast stove.
Further, the secondary smoke-water- to-water heat exchanger is connected in parallel with the low-pressure heater, and the secondary smoke-
The water side-entrance pipeline and water side outlet pipeline of water- to-water heat exchanger and the incoming condensing water pipeline of the low-pressure heater and outlet
Valve is respectively arranged with condensing water conduit.
Further, the fume side exhaust pass of the secondary smoke-water- to-water heat exchanger is connected with chimney, two grades of cigarettes
Air-introduced machine is provided with the fume side exhaust pass of air-water heat exchanger.
Blast furnace gas distributed energy resource system of the present invention realizes the various energy resources shape such as cold and hot electric work by fuel of blast furnace gas
The joint supply of formula：The steam that blast furnace gas boiler is produced first passes through back pressure steam turbine drive blast furnace blower output work, so
Driving condensing turbine drives generator operation output electricity afterwards, and further carrying out step to blast furnace gas boiler fume afterheat returns
Receive and provide low-temperature receiver using drive hot water operated absorption refrigerating machine group work while exporting thermal source for refrigeration consumer.Blast furnace of the present invention
Gas flow distribution formula energy resource system optimized by the energy source user to blast furnace ironmaking region it is integrated, using blast furnace gas as fuel,
Joint supply is carried out to the various energy resources such as hot and cold, electric, work(form, according to the original of " distribution according to need, energy counterpart, cascade utilization "
A set of distributed energy resource system based on blast furnace gas is then constructed, Integrated Energy is substantially increased compared with energy pattern with tradition
Utilization ratio, realizes the performance improvement of systems thermodynamics, reaches science energy, the purpose of optimization energy.
Brief description of the drawings
Fig. 1 is the schematic diagram of the blast furnace gas distributed energy resource system of embodiment 1.
Embodiment
With reference to Figure of description, the present invention will be further described.
Embodiment 1
As shown in figure 1, the present embodiment blast furnace gas distributed energy resource system, including blast furnace gas boiler 1, back pressure type steam turbine
Machine 2, reheater 3, condensing turbine 4, blast furnace blower 5, generator 6, condenser 7, condensate pump 8, gland heater 9,
Low-pressure heater 10, one-level gas-water heat exchanger 11, secondary smoke-water- to-water heat exchanger 12, air-introduced machine 13, chimney 14, hot-water type is inhaled
Receipts formula refrigeration unit 15, air dehumidifying device 16, first circulation water pump 17, second circulation water pump 18, back pressure turbine steam
Bypass 19, the first reducing-and-cooling plant 20, condensing turbine steam by-pass 21, the second reducing-and-cooling plant 22, wherein：
The blast furnace gas boiler 1 and the one-level gas-water heat exchanger 11, secondary smoke-water- to-water heat exchanger 12, air-introduced machine
13rd, chimney 14 connects by the way that flue is in sequential series, and the blast furnace gas boiler 1 is using blast furnace gas as fuel, blast furnace gas boiler 1
The flue gas of back-end ductwork discharge is introduced into one-level gas-water heat exchanger 11 and once exchanged heat, and is changed subsequently into secondary smoke-water
Hot device 12 carries out secondary heat exchange, then after the boosting of air-introduced machine 13 by the row of chimney 14 to air；
The steam (vapor) outlet of the blast furnace gas boiler 1 and the back pressure turbine 2, reheater 3, condensing turbine 4
It is sequentially connected by jet chimney, the steam that blast furnace gas boiler 1 is produced is introduced into back pressure turbine 2, back pressure described in red switch
Formula steam turbine 2 does work, and carries out reheating subsequently into reheater 3, finally enters the condensing turbine 4.
The back pressure turbine 2 with the blast furnace blower 5 is coaxial is connected, the dragging operating acting of blast furnace blower 5；Institute
State condensing turbine 4 and the generator 6 is coaxial is connected, the operating of drawing generator 6 generates electricity.
The condensing turbine 4 is connected by blow-off line with the condenser 7；The condenser 7 and condensate pump
8th, gland heater 9, low-pressure heater 10 are sequentially connected in series along condensation Water flow-path in thermodynamic system of steam tur and connected, the low pressure
The outlet condensate of heater 10 delivers to steam turbine next stage bleeder heater；The water side of the secondary smoke-water- to-water heat exchanger 12
Import and water side outlet are connected with the incoming condensing water pipeline and outlet condensing water conduit of the low-pressure heater 10 respectively, described
Secondary smoke-water- to-water heat exchanger 12 is connected in parallel with the low-pressure heater 10, and the water side of the secondary smoke-water- to-water heat exchanger 12 is entered
Divide on the incoming condensing water pipeline and outlet condensing water conduit of mouth pipeline and water side outlet pipeline and the low-pressure heater 10
Valve is not provided with, the condensate from gland heater 9, which switches over selection by valve and flows through the secondary smoke-water, to be changed
Steam turbine next stage bleeder heater is sent into after hot device 12 or the low-pressure heater 10；
The water side-entrance of the one-level gas-water heat exchanger 11 and water side outlet respectively with the hot-water type absorption refrigeration
The hot water outlet of unit 15 is connected with hot water inlet, and the one-level gas-water heat exchanger 11 is the hot-water type absorption refrigeration
Unit 15 provides driving heat source；The water side outlet of the one-level gas-water heat exchanger 11 separates branch pipe all the way and office and workshop
Heating user is connected, and is that office and workshop heating user provide thermal source.The chilled water of hot water operated absorption refrigerating machine's group 15
Import and chilled water outlet are connected with the chilled water outlet and chilled water import of air dehumidifying device 16 respectively, and the hot-water type is inhaled
Receipts formula refrigeration unit 15 is that the air dehumidifying device 16 provides low-temperature receiver；The chilled water of hot water operated absorption refrigerating machine's group 15
Outlet separates branch pipe all the way and is connected with office and workshop refrigeration consumer, is that office and workshop refrigeration consumer provide low-temperature receiver.
The one-level gas-water heat exchanger 11 is organized with the hot water operated absorption refrigerating machine to be set on 15 hot water connecting line
First circulation water pump 17 is equipped with, hot water operated absorption refrigerating machine's group 15 is connected with the chilled water of the air dehumidifying device 16
Second circulation water pump 18 is provided with pipeline, to overcome pipe resistance；
The air dehumidifying device 16 is connected by air duct with the blast furnace blower 5, the air dehumidifying device
The air cooled down after dehumidification is delivered to the blast furnace blower 5 by 16 to be compressed, and the outlet air of blast furnace blower 5 passes through pipeline
Deliver to blast funnace hot blast stove；
Back pressure turbine steam by-pass 19, the back of the body are provided between the inlet and outlet of the back pressure turbine 2
The first reducing-and-cooling plant 20 is provided with pressure type steam-turbine bypass 19；
Condensing turbine steam by-pass 21 is provided between the inlet and outlet of the condensing turbine 4, it is described solidifying
The second reducing-and-cooling plant 22 is provided with vapour formula steam-turbine bypass 21；
Preferably, blast furnace gas boiler 1 and back pressure turbine 2 use superhigh-pressure high-temp parameter.
The beneficial effect of the present embodiment blast furnace gas distributed energy resource system is：
1) using blast furnace gas as fuel, joint supply is carried out to the various energy resources such as hot and cold, electric, work(form, with traditional height
Combination of the producer gas boiler with Turbo-generator Set, which is compared, substantially increases comprehensive utilization rate of energy source, and passes through the energy
Cascade utilization realizes the performance improvement of systems thermodynamics.
2) blast furnace blower is driven using steam turbine, compared to conventional motorized motions mode, power transmission and distribution system can be reduced
The energy loss of buck of uniting and motor, increases economic efficiency；The dynamic back of the body of high parameter steam setter that blast furnace gas boiler is produced
Pressure type steam turbine drags blast furnace blower, then drives condensing turbine to be generated electricity again, and condensing is used with conventional
Formula steam turbine is compared, and can be saved a set of condenser and the related auxiliary equipment of recirculated water, be simplified system, reduce investment；
The present invention can control the rotating speed of back pressure turbine by the regulation of back pressure turbine throttle flow, and then realize
The operation control of blast furnace air fan delivery and blast；Height is driven using back pressure turbine rather than the condensing turbine in downstream
Stove air blast, it is ensured that desired quick response is adjusted to blast furnace blower；
In addition, under the conditions of equal blast furnace gas consumption, matching somebody with somebody corresponding steam-operating air blast with conventional use blast furnace gas boiler
Unit is compared with remaining blast furnace gas using combination of the blast furnace gas boiler with Turbo-generator Set, the machine that the present invention is used
Group single-machine capacity is bigger, more efficient, and overall economy quality is more preferable, and system is simply a lot, Installed capital cost and occupation of land face
Product is also much smaller.
3) steam discharge of back pressure turbine first sends into blast furnace gas boiler and carries out entering back into condensing turbine punching after reheating
Favourable turn group is done work, and on the one hand can be improved the thermal efficiency of cycle of whole unit, on the other hand can be improved condensing turbine most end several
Steam quality at grade blade, improves the service condition of last stage vane of steam turbine, is conducive to unit safety operation.
4) setting of back pressure turbine steam by-pass and condensing turbine steam by-pass not only contributes to improve unit
Startability, also help system under accident condition stable；In addition, back pressure turbine steam by-pass can also play guarantor
Reheater, the effect for being adequately cooled reheater are protected, and condensing turbine steam by-pass then can be in condensing turbine
Ensure the normal operation of back pressure turbine under accident or stopped status, so that preferentially ensure the normal operation of blast furnace blower,
Avoid because Turbo-generator Sets Faults cause the stoppage in transit of blast furnace system.
5) depth reclaims the low-temperature waste heat resource in blast furnace gas boiler tail flue gas, sets two-stage gas-water heat exchanger
To absorb the heat in flue gas, the final exhaust gas temperature of blast furnace gas boiler can be greatly reduced, the energy of blast furnace gas boiler is improved
Source utilization rate.
6) by blast furnace gas boiler thermal flue gas hot water preparing, and refrigeration unit is driven, and then is air cooling dehumidifying
Device provides low-temperature receiver, and the low water capacity air that dehumidifying device is produced sends into blast furnace, it is possible to decrease blast furnace coke ratio, stable State of Blast Furnace
Condition, improves blast furnace production capacity.
7) Steam Turbine Regenerative System condensate is heated by blast furnace gas boiler thermal flue gas, steam turbine low-pressure is substituted and adds
Hot device draws gas, and the low-pressure heater of exclusion, which draws gas, can continue to do work in condensing turbine, increase unit generation amount.
8) fume waste heat of cascade utilization blast furnace gas boiler outlet, gas-water is set according to the temperature of medium height
The position of heat exchanger, the gas-water heat exchanger connected with hot water absorption refrigeration unit is arranged on previous in flue gas flow
Level, the gas-water heat exchanger connected with Steam Turbine Regenerative System condensing water conduit is arranged on the rear stage in flue gas flow, is led to
Heat in flue gas of the hot water to absorb relatively-high temperature for the absorption refrigeration unit for crossing relatively-high temperature, passes through the vapour of relative low temperature
Heat in flue gas of the turbine heat regenerative system condensate to absorb relative low temperature, realizes the reasonable cascade utilization of smoke heat energy.
More than, only presently preferred embodiments of the present invention, but protection scope of the present invention is not limited thereto, and it is any to be familiar with sheet
Those skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in should all be covered
Within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should be defined by claim is defined.
Claims (7)
1. a kind of blast furnace gas distributed energy resource system, it is characterised in that：Including blast furnace gas boiler, the blast furnace gas boiler
Steam (vapor) outlet be sequentially connected by jet chimney and be provided with back pressure turbine, condensing turbine, the blast furnace coal steam pot
One-level gas-water heat exchanger, secondary smoke-water- to-water heat exchanger are disposed with the back-end ductwork of stove；
Wherein, the back pressure turbine is coaxially connected with blast furnace blower, and blast furnace described in the back pressure steam turbine drive is roused
Blower fan does work；The condensing turbine is connected with generator coaxle, and the condensing turbine drives the electrical power generators；
The condensing turbine is connected by blow-off line with condenser, the condenser and condensate pump, gland heater,
Low-pressure heater is sequentially connected in series in thermodynamic system of steam tur along condensation Water flow-path to connect, and the condensate of the low-pressure heater goes out
Mouth is connected with the next stage bleeder heater of Steam Turbine Regenerative System；The water side-entrance of the secondary smoke-water- to-water heat exchanger and water
Side outlet is connected with the incoming condensing water pipeline and outlet condensing water conduit of the low-pressure heater respectively；
The hot water that the water side-entrance of the one-level gas-water heat exchanger and water side outlet are organized with hot water operated absorption refrigerating machine respectively
Outlet is connected with hot water inlet, wherein, the water side outlet of the one-level gas-water heat exchanger separates branch pipe all the way and office and car
Between heating user be connected；
The freezing of the chilled water import and chilled water outlet of hot water operated absorption refrigerating machine's group respectively with air dehumidifying device
Water out is connected with chilled water import, and the chilled water outlet of hot water operated absorption refrigerating machine's group separates branch pipe all the way and office
It is connected with workshop refrigeration consumer.
2. blast furnace gas distributed energy resource system according to claim 1, it is characterised in that：The back pressure turbine with
Reheater is provided with jet chimney between the condensing turbine.
3. blast furnace gas distributed energy resource system according to claim 1, it is characterised in that：The one-level gas-water is changed
First circulation water pump is provided with the hot water connecting line that hot device is organized with the hot water operated absorption refrigerating machine, the hot-water type is inhaled
Receipts formula refrigeration unit on the chilled water connecting line of the air dehumidifying device with being provided with second circulation water pump.
4. blast furnace gas distributed energy resource system according to claim 1, it is characterised in that：The back pressure turbine
It is provided with back pressure turbine steam by-pass, the back pressure turbine steam by-pass and is provided between steam inlet and outlet
First reducing-and-cooling plant；
Condensing turbine steam by-pass, the condensing-type are provided between the steam inlet of the condensing turbine and outlet
The second reducing-and-cooling plant is provided with steam-turbine bypass.
5. blast furnace gas distributed energy resource system according to claim 1, it is characterised in that：The air dehumidifying device leads to
Cross air duct with the blast furnace blower to be connected, the air outlet slit of the blast furnace blower is connected by pipeline and blast funnace hot blast stove
Connect.
6. blast furnace gas distributed energy resource system according to claim 1, it is characterised in that：Secondary smoke-the water is changed
Hot device is connected in parallel with the low-pressure heater, the water side-entrance pipeline and water side outlet pipe of the secondary smoke-water- to-water heat exchanger
Valve is respectively arranged with the incoming condensing water pipeline and outlet condensing water conduit of road and the low-pressure heater.
7. blast furnace gas distributed energy resource system according to claim 1, it is characterised in that：Secondary smoke-the water is changed
The fume side exhaust pass of hot device is connected with chimney, is provided with the fume side exhaust pass of the secondary smoke-water- to-water heat exchanger
Air-introduced machine.
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| CN106321174B (en) * | 2016-08-23 | 2018-02-13 | 中信重工机械股份有限公司 | A kind of electricity generation system using high-temperature flue gas waste heat |
| CN106321175A (en) * | 2016-08-23 | 2017-01-11 | 中信重工机械股份有限公司 | Coal gas power generation system for steel mills |
| CN106523058A (en) * | 2016-12-05 | 2017-03-22 | 中冶华天工程技术有限公司 | Steam-driven blower system based on optimal utilization of saturated steam of steel mill |
| CN109852750A (en) * | 2019-01-15 | 2019-06-07 | 东北大学 | A kind of refrigerated air-conditioning system and its working method using blast-furnace top gas recovery |
| CN110671206A (en) * | 2019-11-05 | 2020-01-10 | 华润电力郑州航空港智慧能源有限公司 | Distributed energy power station system and energy cascade utilization method |
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| AT511243B1 (en) * | 2011-03-17 | 2013-01-15 | Siemens Vai Metals Tech Gmbh | HÜTTENTECHNISCHE ANLAGE WITH EFFICIENT DOWNWATER USE |
| CN102851420B (en) * | 2012-09-12 | 2014-04-30 | 首钢总公司 | Steelmaking residual heat step recycling method |
| JP5596216B1 (en) * | 2013-10-10 | 2014-09-24 | 株式会社神鋼環境ソリューション | Waste treatment facility |
| CN104534450B (en) * | 2014-08-28 | 2016-10-26 | 国电龙源电力技术工程有限责任公司 | A kind of coal steam-electric plant smoke comprehensive waste-heat utilizing device |
| CN205480908U (en) * | 2016-04-15 | 2016-08-17 | 中冶华天工程技术有限公司 | Blast furnace gas distributed energy system |
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