CN108487954A - A kind of coal gas synergy electricity generation system based on industry dragging - Google Patents
A kind of coal gas synergy electricity generation system based on industry dragging Download PDFInfo
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- CN108487954A CN108487954A CN201810097111.7A CN201810097111A CN108487954A CN 108487954 A CN108487954 A CN 108487954A CN 201810097111 A CN201810097111 A CN 201810097111A CN 108487954 A CN108487954 A CN 108487954A
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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
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- 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
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- 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
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G7/00—Steam superheaters characterised by location, arrangement, or disposition
- F22G7/12—Steam superheaters characterised by location, arrangement, or disposition in flues
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K5/00—Feeding or distributing other fuel to combustion apparatus
- F23K5/002—Gaseous fuel
- F23K5/005—Gaseous fuel from a central source to a plurality of burners
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Water Supply & Treatment (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
A kind of coal gas synergy electricity generation system based on industry dragging, including gaspipe network, first coal gas synergy electricity generation system and the second coal gas synergy electricity generation system, first coal gas synergy electricity generation system includes low parameter gas boiler, low parameter steam turbine, second coal gas synergy electricity generation system includes multiple second coal gas synergy power generation sub-systems, each second coal gas synergy power generation sub-system includes high parameter gas boiler, the first steam turbine of high parameter, the second steam turbine of high parameter, the first generator of high parameter, the second generator of high parameter, oxygen-eliminating device, in the first coal gas synergy electricity generation system, the steam drive low parameter steam turbine acting that low parameter gas boiler generates；In every 1 second coal gas synergy power generation sub-system, the steam that high parameter gas boiler generates sequentially enters the second steam turbine of the first steam turbine of high parameter and high parameter, respectively drives corresponding electrical power generators.
Description
Technical field
The present invention relates to high efficiency of energy to utilize technical field, specifically, being related to a kind of coal gas increasing based on industry dragging
Imitate electricity generation system.
Background technology
In the production process in the fields such as steel, coking, there is a large amount of high-power, high energy consumption rotating machinery, including wind
Machine, compressor, water pump etc., as the auxiliary equipment of process unit, these rotating machineries are that enterprise's station service power consumption rate is caused to occupy height not
Under principal element.On the other hand, will produce by-product gas during steel, coking production, as blast furnace gas, coal gas of converter,
Coke-stove gas etc..In recent years, with the promotion of the raising and technical capability of each factory's energy-saving and emission-reduction consciousness, a large amount of factory adopts
It is dragged with steam turbine and replaces traditional motor drag mode, for driving these high-power rotating machineries, by above-mentioned by-product gas
It is sent into boiler to burn, the steam of generation is used for driving steam turbine, and rotating machinery is driven to do work, the driving of more traditional motor
Mode has apparent economic benefit.
In recent years, with the gradually expansion of factory's production capacity, under the electronic trend for changing steam-operating, there are the lands Quan Chang in many factories
Continuing built by separate periods and ultimately forming more low parameter (such as medium temperature and medium pressure) boiler+low parameter (such as medium temperature and medium pressure) industrial steam turbines
Installation pattern.However, low parameter boiler and low parameter steam turbine all have the shortcomings of efficiency is relatively low, heat consumption is higher, lead to factory
By-product gas resource is underutilized.For example, certain steel mill has built more than ten platform medium temperature and medium pressure steam turbines successively, steam is by more
Platform medium temperature and medium pressure gas boiler is supplied, and the actual operating efficiency of these medium temperature and medium pressure low capacity boilers only has 82%, far below height
The thermal efficiency of parameter heavy duty boiler, in addition, the efficiency of medium temperature and medium pressure steam turbine is also far below high-parameter steam turbine, this is resulted in
The thermal efficiency of full factory is relatively low, to the heat utilization rate wretched insufficiency of by-product gas.For this purpose, related technical personnel are seeking to carry always
Effective rebuilding approach of the unit entirety thermal efficiency is risen, still, since industry dragging steam turbine is the most crucial process unit in upstream
Energy supply, it is necessary to assure its safe and stable operation, this point are different from conventional power unit transformation, therefore, how not change in original system
On the basis of, a set of coal gas synergy electricity generating plan is built, Gas Resource utilization ratio is improved, is current each factory's general concern
Problem has important Practical significance.
Invention content
The technical problem to be solved in the invention is to provide a kind of coal gas synergy electricity generation system based on industry dragging.
In order to solve the above technical problems, the technical solution adopted in the present invention is：A kind of coal gas increasing based on industry dragging
Imitate electricity generation system, including gaspipe network, the first coal gas synergy electricity generation system and the second coal gas synergy electricity generation system, wherein first
Coal gas synergy electricity generation system includes low parameter gas boiler, low parameter steam turbine, and the second coal gas synergy electricity generation system includes multiple
Second coal gas synergy power generation sub-system, each second coal gas synergy power generation sub-system include high parameter gas boiler, high parameter
First steam turbine, the second steam turbine of high parameter, the first generator of high parameter, the second generator of high parameter, oxygen-eliminating device, gaspipe network
It is connected to respectively with the gas inlet of all low parameter gas boilers and all high parameter gas boilers, is low parameter gas boiler
And/or high parameter gas boiler supplies fuel；In the first coal gas synergy electricity generation system, the main steam of low parameter gas boiler goes out
Mouth is connected to the air intake of corresponding low parameter steam turbine；In every 1 second coal gas synergy power generation sub-system, high parameter coal gas
The main-steam outlet of boiler is connected to the air intake of the first steam turbine of high parameter, and the steam drain of first steam turbine of high parameter with
The air intake of the second steam turbine of high parameter is connected to, the steam drain of the second steam turbine of the high parameter and the steam of the oxygen-eliminating device into
Mouth connection；The first steam turbine of the high parameter is connected with the first generator of the high parameter, and the high parameter first is driven to generate electricity
Machine generates electricity；The second steam turbine of the high parameter is connected with the second generator of the high parameter, and the high parameter second is driven to generate electricity
Machine generates electricity, wherein the first steam turbine of the high parameter and the second steam turbine of high parameter are back pressure turbine.
Preferably, further include reheater in every 1 second coal gas synergy power generation sub-system, the reheater is arranged in height
In the high-temperature flue of parameter gas boiler, the steam drain of the first steam turbine of high parameter is connected to the air intake of reheater, reheater
Venthole be connected to the air intake of the second steam turbine of the air intake of each low parameter steam turbine and high parameter.
Preferably, further include low parameter condenser, low parameter condensate pump in the first coal gas synergy electricity generation system,
Further include low-pressure coal saver, feed pump in every 1 second coal gas synergy power generation sub-system, the coal gas synergy is also wrapped using system
Include condensate tank and condensed water booster pump, wherein the first coal gas synergy utilize system in low parameter steam turbine steam drain with
Corresponding low parameter condenser, corresponding low parameter condensate pump are sequentially connected to along carbonated drink flow direction, are collected into condensate tank
Water inlet, and by the water outlet of the condensate tank through the condensed water booster pump respectively with the second coal gas synergy generate electricity subsystem
The water inlet of low-pressure coal saver, oxygen-eliminating device in system is sequentially communicated；In every 1 second coal gas synergy power generation sub-system, oxygen-eliminating device
Water outlet be connected to the water inlet of high parameter gas boiler by the feed pump, to high parameter gas boiler supply water；It is described
Low-pressure coal saver is set in the back-end ductwork of the high parameter gas boiler, is heat with the fume afterheat of the back-end ductwork
The condensed water in low-pressure coal saver is heated in source.
Preferably, the coal gas synergy electricity generation system further includes condensation water preheater, and the condensation water preheater is in carbonated drink
It is set in flow between the condensed water booster pump and the low-pressure coal saver, the condensed water for coming to condensate tank carries out
Preheating；The steam inlet of the condensation water preheater is connected to low-pressure steam pipeline in factory, and the condensation water preheater is in factory
The steam that low-pressure steam pipeline comes is as heat source.
Preferably, further include that reheated steam collects main pipe, wherein the venthole of each reheater is first steamed with the reheating
Vapour collects main pipe connection, then collects main pipe by the reheated steam and be connected to the air intake of each low parameter steam turbine.
Preferably, further include that condensed water collects main pipe, wherein the water outlet of each low parameter condensate pump first with it is described
Condensed water collects main pipe connection, then collects main pipe by the condensed water and be connected to the water inlet of the condensate tank.
Preferably, each high parameter gas boiler is adopted with the main steam system between the first steam turbine of corresponding high parameter
It is logical between the main-steam outlet of each high parameter gas boiler and the air intake of the first steam turbine of corresponding high parameter with unit style
Cross individual jet chimney connection；Reheated steam between the first steam turbine of each high parameter gas boiler and the high parameter
System also uses unit style, the steam inlet of the reheater of each high parameter gas boiler and the first steam turbine of corresponding high parameter
Steam drain between be connected to by individual jet chimney.
Preferably, the first coal gas synergy is factory's original system using system, and the second coal gas synergy utilizes system
System is that factory creates system, and when normal operation, the low parameter gas boiler in original system is stopped transport, and displaces gas supply to new
The high parameter gas boiler built, the steam that high parameter gas boiler generates are utilized by high-parameter steam turbine and are sent after reheated device
To the low parameter steam turbine in original system, the low parameter steam turbine in the original system keeps original state to run substantially；When new
When the high-parameter steam turbine built in system breaks down, the steam that high parameter gas boiler generates subtracts by turbine bypass system
The low parameter steam turbine into original system, the low parameter steam turbine in the original system is sent to keep substantially after warm reduced pressure treatment
Original state is run；When the high parameter gas boiler in newly-built system breaks down, newly-built high parameter gas boiler is stopped transport, original
Low parameter gas boiler in system puts into operation, in the steam supply original system that the low parameter gas boiler in original system generates
Low parameter steam turbine, a whole set of first coal gas synergy restored to the original state operation using system.
Preferably, low parameter steam turbine includes for driving the industry of implement to drag unit and for driving generator
One or both of generating set, wherein industry dragging unit is used to ensure the normal operation of process upstream facility, and generator
Group is then used to balance residue steam amount；The type selecting capacity of high parameter gas boiler is more than the capacity of low parameter industry dragging unit；
When the gas volume for supplying gas boiler is bigger than normal, the quantity of steam in reheating main pipe is more than the consumption of the industry dragging unit of low parameter
Amount, steam extra at this time is sent into generating set, for generating electricity.
Preferably, there are correspondences for the steam parameter of the low parameter gas boiler and high parameter gas boiler, if low
Parameter gas boiler is the boiler of time high temperature sub-high pressure boiler, medium temperature and medium pressure boiler or more low parameter, then high parameter gas boiler
It is the boiler of high-temperature high-pressure boiler, superhigh-pressure high-temp boiler, superhigh temperature superpressure boiler or more high parameter.
The coal gas synergy electricity generation system based on industry dragging of the present invention has the advantages that：
1) a kind of coal gas synergy electricity generation system based on industry dragging is constructed, under conditions of not increasing any energy consumption,
By promoting boiler parameter and adding back pressure type steam turbine generating set, being substantially improved for the unit entirety thermal efficiency is realized, is protected
Zheng Liao factories original low parameter industry dragging steam turbine is remained stationary operation, and newly-built high parameter back pressure turbine generates electricity
The generated energy of unit is that this system mainly increases income newly.
2) it is optimized for deaerating type of cycles, the present invention is used using the first turbine discharge of high parameter to supply deoxygenation
Vapour, while in view of the pressure of newly-built the first turbine discharge of high parameter is far above the operating pressure of oxygen-eliminating device, therefore logical height
The second steam turbine of parameter reduces steam pressure, absorbs high-grade steam energy, the second steam turbine of high parameter that then will be newly-built
Deoxygenation vapour of the low-pressure steam of discharge as oxygen-eliminating device, this with routine using high parameter the first turbine discharge pressure and temperature reducing come
It is compared for the mode of deoxygenation steam, economic benefit highly significant.
3) newly-built the first steam turbine of high parameter and newly-built the second steam turbine of high parameter are all made of back pressure turbine, nothing
Condenser system, a whole set of more conventional condensing-type unit of carbonated drink therrmodynamic system is greatly simplified, reduces condensing plant and pipeline, build at
Originally it is greatly reduced；In addition, this patent steam turbine main building arrangement, compared with condensing turbine main building, arrangement is greatly simplified,
Firing floor absolute altitude and main building absolute altitude can be reduced suitably, to reduce workshop building cost.
4) system proposed by the present invention has also fully considered the variation of actual operating mode, to reduce energy waste and ensure
The normal operation of industry dragging steam turbine drags steamer when newly-built high parameter boiler entrance gas volume is excessively high for industry
The quantity of steam of machine is more than its actual demand, and steam extra at this time is carried out by the generating set in original low parameter steam turbine
Digestion；And when newly-built high parameter boiler entrance gas volume is too low, the quantity of steam for industry dragging steam turbine is less than in fact
Border demand ensures the newly-built high parameter coal gas of this system by shutting down coal gas user outside this system or reducing its gas consumption at this time
The air inflow of boiler, and then ensure the normal operation of industry dragging steam turbine.
5) design, more conventional gas generating system is optimized to therrmodynamic system in the present invention, and this patent is additionally arranged low pressure
The waste heat of boiler tail flue gas is rationally utilized in the setting of economizer, condensation water preheater, wherein low-pressure coal saver, realizes solidifying
The preheating born water reduces the heat consumption of deaerating type of cycles, to reduce boiler oil consumption, achievees the purpose that " saving coal "；And
Condensation water preheater then heats the low-temperature condensate of condenser outlet using the low-pressure steam in low-pressure steam pipeline in factory, carries
The condensing water temperature of high-low pressure economizer entrance so that low-pressure coal saver wall surface is not in low-temperature-acid-corrosion, ensures that low pressure saves
The safe operation of coal device.
Description of the drawings
By the way that embodiment is described in conjunction with following accompanying drawings, features described above of the invention and technological merit will become
More understands and be readily appreciated that.
Fig. 1 is the coal gas synergy electricity generation system process flow chart based on industry dragging for indicating the embodiment of the present invention.
Specific implementation mode
Below with reference to the accompanying drawings come describe it is of the present invention based on industry dragging coal gas synergy electricity generation system implementation
Example.Those skilled in the art will recognize, without departing from the spirit and scope of the present invention, can use each
The different mode or combinations thereof of kind is modified described embodiment.Therefore, attached drawing and description are inherently illustrative
, it is not intended to limit the scope of the claims.In addition, in the present specification, attached drawing is drawn not in scale, and phase
Same reference numeral indicates identical part.
In the coal gas synergy electricity generation system based on industry dragging of the present invention, low parameter, high parameter refer to the first coal gas
Synergy electricity generation system and the second coal gas synergy electricity generation system are comparatively.The wherein described parameter is the performances such as finger pressure, temperature
Parameter.Low parameter gas boiler with respect to high parameter gas boiler for, correspondingly, corresponding with low parameter gas boiler be
Low parameter steam turbine and low parameter generator.Corresponding with high parameter boiler is high-parameter steam turbine and high parameter generator.It is low
The steam parameter of parameter gas boiler and high parameter gas boiler may exist certain correspondence, if for example, low parameter coal
Gas boiler is time high temperature sub-high pressure boiler or medium temperature and medium pressure the boiler even lower boiler of parameter, then high parameter gas boiler can be with
It is high-temperature high-pressure boiler, superhigh-pressure high-temp boiler or superhigh temperature the superpressure boiler even higher boiler of parameter.
1 illustrates the coal gas synergy electricity generation system based on industry dragging below in conjunction with the accompanying drawings comprising gaspipe network 5, the
One coal gas synergy electricity generation system and the second coal gas synergy electricity generation system, wherein
First coal gas synergy electricity generation system includes multiple first coal gas synergy power generation sub-systems, each first coal gas synergy hair
Electronic system includes low parameter gas boiler, low parameter steam turbine.In Fig. 1, the first coal gas synergy electricity generation system includes low
Parameter gas boiler 1.1, low parameter steam turbine 2.1 until low parameter gas boiler 1.N, low parameter steam turbine 2.N N number of first
Coal gas synergy power generation sub-system.In every 1 first coal gas synergy power generation sub-system, the main-steam outlet of low parameter gas boiler
It is connected to the air intake of corresponding low parameter steam turbine.In Fig. 1, the main-steam outlet of low parameter gas boiler 1.1 and low ginseng
The air intake connection of number steam turbine 2.1.It the above is only exemplary illustration, in fact, the first coal gas synergy also may be used using subsystem
To be different, for example, the first coal gas synergy having only has low parameter gas boiler using subsystem, the first coal gas having
Synergy only has low parameter steam turbine using subsystem, and some then has low parameter gas boiler and low parameter steam turbine simultaneously.Also
It is to say, low parameter gas boiler and low parameter steam turbine are not one-to-one.First coal gas synergy both can be with using system
It is first pooled together using the outlet vapor of piping-main scheme, i.e., more gas boilers, then connected respectively with the air intake of each steam turbine
It is logical.Can also be unit style, i.e., low parameter gas boiler connects one to one with low parameter steam turbine.
Second coal gas synergy electricity generation system includes multiple second coal gas synergy power generation sub-systems, is with two second in Fig. 1
It is illustrated for coal gas synergy power generation sub-system, but the present invention is not limited thereto.Each second coal gas synergy power generation sub-system
Include high parameter gas boiler, the first steam turbine of high parameter, the second steam turbine of high parameter, the first generator of high parameter, senior staff officer
Several second generators, oxygen-eliminating device.In Fig. 1, the first coal gas synergy electricity generation system includes two the second coal gas synergy power generation subsystems
System, a second coal gas synergy power generation sub-system include high parameter gas boiler 6.1, the first steam turbine of high parameter 7.1 and with
Its first generator of high parameter 8.1 connected, the second steam turbine of high parameter 10.1 and high parameter connected to it second generate electricity
Machine 11.1, oxygen-eliminating device 19.1.Another the second coal gas synergy power generation sub-system includes high parameter gas boiler 6.2, high parameter
It one steam turbine 7.2 and first generator of high parameter connected to it 8.2, the second steam turbine of high parameter 10.2 and is connected thereto
The second generator of high parameter 11.2, oxygen-eliminating device 19.2.Wherein, the second steam turbine of the first steam turbine of the high parameter and high parameter
It is back pressure turbine.
In every 1 second coal gas synergy power generation sub-system, main-steam outlet and the high parameter first of high parameter gas boiler
The air intake of steam turbine is connected to, and the steam drain of first steam turbine of high parameter and the air intake of the second steam turbine of high parameter connect
Logical, the steam drain of the second steam turbine of the high parameter is connected to the steam inlet of the oxygen-eliminating device.As shown in Figure 1, high parameter coal
The main-steam outlet of gas boiler 6.1 is connected to the air intake of the first steam turbine of high parameter 7.1, and first steam turbine of high parameter
7.1 steam drain is connected to the air intake of the second steam turbine of high parameter 10.1, the steam discharge of the second steam turbine of the high parameter 10.1
Mouth is connected to the steam inlet of the oxygen-eliminating device 19.1.
Gaspipe network is connected to the gas inlet of all low parameter gas boilers and all high parameter gas boilers respectively, is
Low parameter gas boiler and/or high parameter gas boiler supply fuel.
The present embodiment is not under conditions of increasing any energy consumption, by promoting boiler parameter and adding back pressure type steam turbine hair
Motor group constructs a kind of coal gas synergy electricity generation system based on industry dragging, can apply in currently employed low parameter coal gas
In the system reform of boiler.Steam pressure is reduced by the second steam turbine, high-grade steam energy is absorbed, then by the second vapour
Deoxygenation vapour of the low-pressure steam of turbine discharge as oxygen-eliminating device, this is supplied with routine using the first turbine discharge pressure and temperature reducing
The mode of deoxygenation steam is compared, economic benefit highly significant.
The second coal gas synergy is briefly described below being applied using system, the first coal gas synergy (is being adopted using system
With the system of low parameter gas boiler) transformation on, the first coal gas synergy using system be factory's original system, the second coal gas increase
Effect is that factory creates system using system, and when normal operation, the low parameter gas boiler in original system is stopped transport, and coal gas is displaced
It is supplied to newly-built high parameter gas boiler, the steam that high parameter gas boiler generates to be utilized by high-parameter steam turbine and through again
Send the low parameter steam turbine into original system, the low parameter steam turbine in original system that original state is kept to run substantially after heat；When
When high-parameter steam turbine in newly-built system breaks down, the steam that high parameter gas boiler generates passes through turbine bypass system
The low parameter steam turbine into original system, the low parameter steam turbine in original system is sent to keep former substantially after pressure and temperature reducing processing
Shape is run；When the high parameter gas boiler in newly-built system breaks down, newly-built high parameter gas boiler is stopped transport, original system
Low parameter gas boiler in system puts into operation, in the steam supply original system that the low parameter gas boiler in original system generates
Low parameter steam turbine, a whole set of first coal gas synergy is restored to the original state using system to be run.
In one alternate embodiment, in every 1 second coal gas synergy power generation sub-system, in high parameter gas boiler
Reheater is additionally provided in high-temperature flue, the steam drain of the first steam turbine of high parameter is first connected to the air intake of the reheater,
The venthole of the reheater is connected to the air intake of the second steam turbine of high parameter again.As shown in Figure 1, in high parameter gas boiler
It is provided with reheater 9.1 in 6.1 high-temperature flue, the steam drain of the first steam turbine of high parameter 7.1 is first with reheater 9.1 into vapour
Mouth connection, the venthole of reheater 9.1 are connected to the air intake of the second steam turbine of high parameter 10.1 again.Similarly, in high parameter
Reheater 9.2, the steam drain elder generation of the first steam turbine of high parameter 7.2 and reheater are provided in the high-temperature flue of gas boiler 6.2
9.2 air intake connection, the venthole of reheater 9.2 are connected to the air intake of the second steam turbine of high parameter 10.2 again.
In one alternate embodiment, the venthole of each reheater also connects with the air intake of each low parameter steam turbine respectively
It is logical.
In one alternate embodiment, further include low parameter condenser, low parameter in the first coal gas synergy electricity generation system
Condensate pump, as shown in Figure 1, there is low parameter condenser 3.1 to 3.N, low parameter condensate pump 4.1 to 4.N.In every 1 second coal
Further include low-pressure coal saver, feed pump in gas synergy power generation sub-system, as shown in Figure 1, low-pressure coal saver 16.1 is set to senior staff officer
In the back-end ductwork of number gas boiler 6.1, using the fume afterheat of back-end ductwork as heat source, to the condensation in low-pressure coal saver 16.1
Water is heated.Similarly, low-pressure coal saver 16.2 is set in the back-end ductwork of high parameter gas boiler 6.2, with tail portion cigarette
The fume afterheat in road is heat source, is preheated to the condensed water in low-pressure coal saver 16.2.As shown in Figure 1, oxygen-eliminating device 19.1 is logical
It crosses feed pump 20.1 to supply water to high parameter boiler 6.1, oxygen-eliminating device 19.2 is supplied water by feed pump 20.2 to high parameter boiler 6.2.
Coal gas synergy electricity generation system is additionally provided with condensate tank 14 and condensed water booster pump 15, wherein each low parameter steamer
The steam drain of machine is flowed with the water inlet of corresponding low parameter condenser, corresponding low parameter condensate pump, condensate tank along carbonated drink
To being sequentially connected to, and the water outlet of condensate tank is then divided into multiple branches through the condensed water booster pump, each branch with it is right
The water inlet of the low-pressure coal saver, oxygen-eliminating device answered is sequentially communicated.The water outlet of each oxygen-eliminating device by respective feed pump with it is right
The water inlet for the high parameter gas boiler answered is connected to, and is supplied water to high parameter gas boiler.
In one alternate embodiment, coal gas synergy electricity generation system further includes condensation water preheater 16, and the condensed water is pre-
Hot device 16 is set in carbonated drink flow between the condensed water booster pump 15 and the low-pressure coal saver, for condensate tank
The condensed water come is preheated.The steam inlet of condensation water preheater is connected to low-pressure steam pipeline in factory, is steamed with low pressure in factory
The steam that steam pipe road comes is as heat source.As shown in Figure 1, condensation water preheater 16 using the steam of low-pressure steam pipeline 17 in factory come
Heat-setting water.
In one alternate embodiment, as shown in Figure 1, further including that condensed water collects main pipe 13.Each low parameter condensed water
The water outlet of pump first collects main pipe 13 with condensed water and is connected to, then collects the water inlet of main pipe 13 and condensate tank 14 by condensed water
Connection.
In one alternate embodiment, as shown in Figure 1, further including that reheated steam collects main pipe 12.Each reheater goes out
Steam ports first collects main pipe 12 with reheated steam and is connected to, then by reheated steam collect main pipe and each low parameter steam turbine into vapour
Mouth connection.
In one alternate embodiment, the main steam between high parameter gas boiler and the first steam turbine of corresponding high parameter
System use unit style, the main-steam outlet of each high parameter gas boiler and the air intake of the first steam turbine of corresponding high parameter it
Between be connected to by individual jet chimney.
Reheating steam system between the first steam turbine of high parameter gas boiler and high parameter also uses unit style, each height
By independent between the steam inlet of the reheater of parameter gas boiler and the steam drain of the first steam turbine of corresponding high parameter
Jet chimney connection.
In one alternate embodiment, the low parameter steam turbine includes the industry dragging unit for driving implement
With the generating set two types for driving generator.Low parameter steam turbine includes the industry dragging for driving implement
Unit and one or both of generating set for driving generator.Wherein, industry dragging unit is for ensureing that process upstream is set
The normal operation applied, and generating set is then used to balance residue steam amount；The type selecting capacity of high parameter gas boiler is more than low ginseng
The capacity of number industry dragging unit；When the gas volume for supplying gas boiler is bigger than normal, the quantity of steam in reheating main pipe is more than low ginseng
The consumption of several industry dragging units, steam extra at this time is sent into generating set, for generating electricity.
The coal gas synergy electricity generation system based on industry dragging of the present invention has the advantages that：
1) a kind of coal gas synergy electricity generation system based on industry dragging is constructed, under conditions of not increasing any energy consumption,
By promoting boiler parameter and adding back pressure type steam turbine generating set, being substantially improved for the unit entirety thermal efficiency is realized, is protected
Zheng Liao factories original low parameter industry dragging steam turbine is remained stationary operation, and newly-built high parameter back pressure turbine generates electricity
The generated energy of unit is that this system mainly increases income newly.
2) it is optimized for deaerating type of cycles, the present invention is used using the first turbine discharge of high parameter to supply deoxygenation
Vapour, while in view of the pressure of newly-built the first turbine discharge of high parameter is far above the operating pressure of oxygen-eliminating device, therefore logical height
The second steam turbine of parameter reduces steam pressure, absorbs high-grade steam energy, the second steam turbine of high parameter that then will be newly-built
Deoxygenation vapour of the low-pressure steam of discharge as oxygen-eliminating device, this with routine using high parameter the first turbine discharge pressure and temperature reducing come
It is compared for the mode of deoxygenation steam, economic benefit highly significant.
3) newly-built the first steam turbine of high parameter and newly-built the second steam turbine of high parameter are all made of back pressure turbine, nothing
Condenser system, a whole set of more conventional condensing-type unit of carbonated drink therrmodynamic system is greatly simplified, reduces condensing plant and pipeline, build at
Originally it is greatly reduced；In addition, this patent steam turbine main building arrangement, compared with condensing turbine main building, arrangement is greatly simplified,
Firing floor absolute altitude and main building absolute altitude can be reduced suitably, to reduce workshop building cost.
4) system proposed by the present invention has also fully considered the variation of actual operating mode, to reduce energy waste and ensure
The normal operation of industry dragging steam turbine drags steamer when newly-built high parameter boiler entrance gas volume is excessively high for industry
The quantity of steam of machine is more than its actual demand, and steam extra at this time is carried out by the generating set in original low parameter steam turbine
Digestion；And when newly-built high parameter boiler entrance gas volume is too low, the quantity of steam for industry dragging steam turbine is less than in fact
Border demand ensures the newly-built high parameter coal gas of this system by shutting down coal gas user outside this system or reducing its gas consumption at this time
The air inflow of boiler, and then ensure the normal operation of industry dragging steam turbine.
5) design, more conventional gas generating system is optimized to therrmodynamic system in the present invention, and this patent is additionally arranged low pressure
The waste heat of boiler tail flue gas is rationally utilized in the setting of economizer, condensation water preheater, wherein low-pressure coal saver, realizes solidifying
The preheating born water reduces the heat consumption of deaerating type of cycles, to reduce boiler oil consumption, achievees the purpose that " saving coal "；And
Condensation water preheater then heats the low-temperature condensate of condenser outlet using the low-pressure steam in low-pressure steam pipeline in factory, carries
The condensing water temperature of high-low pressure economizer entrance so that low-pressure coal saver wall surface is not in low-temperature-acid-corrosion, ensures that low pressure saves
The safe operation of coal device.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification made by all within the spirits and principles of the present invention,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of coal gas synergy electricity generation system based on industry dragging, which is characterized in that including gaspipe network, the first coal gas synergy
Electricity generation system and the second coal gas synergy electricity generation system, wherein
First coal gas synergy electricity generation system includes low parameter gas boiler, low parameter steam turbine,
Second coal gas synergy electricity generation system includes multiple second coal gas synergy power generation sub-systems, each second coal gas synergy power generation
System include high parameter gas boiler, the first steam turbine of high parameter, the second steam turbine of high parameter, the first generator of high parameter,
The second generator of high parameter, oxygen-eliminating device,
Gaspipe network is connected to the gas inlet of all low parameter gas boilers and all high parameter gas boilers respectively, is low ginseng
Number gas boiler and/or high parameter gas boiler supply fuel；
In the first coal gas synergy electricity generation system, the main-steam outlet of low parameter gas boiler and corresponding low parameter steam turbine
Air intake is connected to；
In every 1 second coal gas synergy power generation sub-system, main-steam outlet and the first steamer of high parameter of high parameter gas boiler
The air intake of machine is connected to, and the steam drain of first steam turbine of high parameter is connected to the air intake of the second steam turbine of high parameter, institute
The steam drain for stating the second steam turbine of high parameter is connected to the steam inlet of the oxygen-eliminating device；
The first steam turbine of the high parameter is connected with the first generator of the high parameter, and the first generator of the high parameter is driven to send out
Electricity；
The second steam turbine of the high parameter is connected with the second generator of the high parameter, and the second generator of the high parameter is driven to send out
Electricity,
Wherein, the first steam turbine of the high parameter and the second steam turbine of high parameter are back pressure turbine.
2. the coal gas synergy electricity generation system according to claim 1 based on industry dragging, which is characterized in that
Further include reheater in every 1 second coal gas synergy power generation sub-system,
The reheater is arranged in the high-temperature flue of high parameter gas boiler, the steam drain and reheating of the first steam turbine of high parameter
The air intake of device is connected to, the venthole of reheater and the second steam turbine of air intake and high parameter of each low parameter steam turbine into
Steam ports is connected to.
3. the coal gas synergy electricity generation system according to claim 2 based on industry dragging, which is characterized in that
Further include low parameter condenser, low parameter condensate pump in the first coal gas synergy electricity generation system,
Further include low-pressure coal saver, feed pump in every 1 second coal gas synergy power generation sub-system,
The coal gas synergy further includes condensate tank and condensed water booster pump using system,
Wherein, the first coal gas synergy using the low parameter steam turbine in system steam drain and corresponding low parameter condenser, right
The low parameter condensate pump answered sequentially is connected to along carbonated drink flow direction, collects the water inlet into condensate tank, and pass through the condensation
The water outlet of water tank through the condensed water booster pump respectively with the low-pressure coal saver in the second coal gas synergy power generation sub-system, deoxygenation
The water inlet of device is sequentially communicated；
In every 1 second coal gas synergy power generation sub-system, the water outlet of oxygen-eliminating device passes through the feed pump and high parameter coal gas pot
The water inlet of stove is connected to, and is supplied water to high parameter gas boiler；
The low-pressure coal saver is set in the back-end ductwork of the high parameter gas boiler, more than the flue gas of the back-end ductwork
Heat is heat source, is heated to the condensed water in low-pressure coal saver.
4. the coal gas synergy electricity generation system according to claim 3 based on industry dragging, which is characterized in that further include condensation
Water preheater,
The condensation water preheater is set in carbonated drink flow between the condensed water booster pump and the low-pressure coal saver, is used
It is preheated in the low-temperature condensate come to condensate tank；
The steam inlet of the condensation water preheater is connected to low-pressure steam pipeline in factory, and the condensation water preheater is with low in factory
Press the steam of jet chimney as heat source.
5. the coal gas synergy electricity generation system according to claim 4 based on industry dragging, which is characterized in that
Further include that reheated steam collects main pipe, wherein
The venthole of each reheater first collects main pipe with the reheated steam and is connected to, then collects mother by the reheated steam
Pipe is connected to the air intake of each low parameter steam turbine.
6. the coal gas synergy electricity generation system according to claim 5 based on industry dragging, which is characterized in that
Further include that condensed water collects main pipe, wherein
The water outlet of each low parameter condensate pump first collects main pipe with the condensed water and is connected to, then is converged by the condensed water
Collection main pipe is connected to the water inlet of the condensate tank.
7. the coal gas synergy electricity generation system according to claim 1 based on industry dragging, which is characterized in that
Main steam system between each high parameter gas boiler and the first steam turbine of corresponding high parameter uses unit style, respectively
By individually steaming between the main-steam outlet of platform high parameter gas boiler and the air intake of the first steam turbine of corresponding high parameter
Steam pipe road is connected to；
Reheating steam system between the first steam turbine of each high parameter gas boiler and the high parameter also uses unit style,
It is logical between the steam inlet of the reheater of each high parameter gas boiler and the steam drain of the first steam turbine of corresponding high parameter
Cross individual jet chimney connection.
8. the coal gas synergy electricity generation system according to claim 1 based on industry dragging, which is characterized in that first coal
Gas synergy is factory's original system using system, and the second coal gas synergy is that factory creates system using system,
When normal operation, the low parameter gas boiler in original system is stopped transport, and displaces gas supply to newly-built high parameter coal
Gas boiler, the steam that high parameter gas boiler generates are utilized by high-parameter steam turbine and are sent into original system after reheated device
Low parameter steam turbine, the low parameter steam turbine in the original system keeps original state to run substantially；
When the high-parameter steam turbine in newly-built system breaks down, the steam that high parameter gas boiler generates is by by steam turbine
The low parameter steam turbine into original system, the low parameter steam turbine in the original system are sent after the system pressure and temperature reducing processing of road
It is basic to keep original state operation；
When the high parameter gas boiler in newly-built system breaks down, newly-built high parameter gas boiler is stopped transport, original system
In low parameter gas boiler put into operation, it is low in the steam supply original system that low parameter gas boiler in original system generates
Parameter steam turbine, a whole set of first coal gas synergy is restored to the original state using system to be run.
9. the coal gas synergy electricity generation system according to claim 1 based on industry dragging, which is characterized in that low parameter steamer
Machine includes the industry dragging unit for driving implement and one or both of generating set for driving generator,
Wherein, industry dragging unit is used to ensure the normal operation of process upstream facility, and generating set is then more than needed for balancing
Quantity of steam；
The type selecting capacity of high parameter gas boiler is more than the capacity of low parameter industry dragging unit；
When the gas volume for supplying gas boiler is bigger than normal, the quantity of steam in reheating main pipe is more than the industry dragging unit of low parameter
Consumption, steam extra at this time is sent into generating set, for generating electricity.
10. the coal gas synergy electricity generation system according to claim 1 based on industry dragging, which is characterized in that the low ginseng
There are correspondences for the steam parameter of number gas boiler and high parameter gas boiler, if low parameter gas boiler is that time high temperature time is high
The boiler of boiler, medium temperature and medium pressure boiler or more low parameter is pressed, then high parameter gas boiler is high-temperature high-pressure boiler, superhigh-pressure high-temp
The boiler of boiler, superhigh temperature superpressure boiler or more high parameter.
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| CN102080582A (en) * | 2010-12-06 | 2011-06-01 | 南京凯盛开能环保能源有限公司 | Coal-fired power generation and waste heat power generation coupling system for private station of cement kiln |
| KR20120037224A (en) * | 2010-10-11 | 2012-04-19 | 현대중공업 주식회사 | Hybrid of Solar Thermal Power Plant and Fossil Fuel Boiler |
| CN206875995U (en) * | 2017-05-18 | 2018-01-12 | 中冶华天南京工程技术有限公司 | Heat power generating system based on coke-oven plant's residual heat and energy integrated utilization |
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- 2018-01-31 CN CN201810097111.7A patent/CN108487954B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120037224A (en) * | 2010-10-11 | 2012-04-19 | 현대중공업 주식회사 | Hybrid of Solar Thermal Power Plant and Fossil Fuel Boiler |
| CN102080582A (en) * | 2010-12-06 | 2011-06-01 | 南京凯盛开能环保能源有限公司 | Coal-fired power generation and waste heat power generation coupling system for private station of cement kiln |
| CN206875995U (en) * | 2017-05-18 | 2018-01-12 | 中冶华天南京工程技术有限公司 | Heat power generating system based on coke-oven plant's residual heat and energy integrated utilization |
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