CN108413379B - It is a kind of that system is utilized based on the industrial coal gas synergy dragged - Google Patents
It is a kind of that system is utilized based on the industrial coal gas synergy dragged Download PDFInfo
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- CN108413379B CN108413379B CN201810097157.9A CN201810097157A CN108413379B CN 108413379 B CN108413379 B CN 108413379B CN 201810097157 A CN201810097157 A CN 201810097157A CN 108413379 B CN108413379 B CN 108413379B
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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
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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
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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
- F01K13/00—General layout or general methods of operation of complete plants
-
- 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
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/006—Auxiliaries or details not otherwise provided for
-
- 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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- 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)
Abstract
It is a kind of that system is utilized based on the industrial coal gas synergy dragged, system is utilized including gaspipe network and the first, second coal gas synergy, first coal gas synergy includes multiple low parameter steam turbines and low parameter gas boiler using system, second coal gas synergy includes high parameter gas boiler, high-parameter steam turbine, high parameter generator, reheater using system, and the main-steam outlet of low parameter gas boiler is connected to the air intake of low parameter steam turbine；The main-steam outlet of high parameter gas boiler is connected to the air intake of high-parameter steam turbine, and the steam drain of the high-parameter steam turbine is connected to the air intake of reheater；The reheater is set in the high-temperature flue of the high parameter gas boiler, the venthole of the reheater is connected to the steam inlet of each low parameter steam turbine, the high-parameter steam turbine is connected with the high parameter generator, the high parameter electrical power generators are driven, the high-parameter steam turbine is back pressure turbine.
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
Effect utilizes system.
Background technique
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, by-product gas can be generated during steel, coking production, as blast furnace gas, coal gas of converter,
Coke-stove gas etc..In recent years, with the raising of each factory's energy-saving and emission-reduction consciousness and the promotion of technical capability, a large amount of factory is adopted
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, more traditional motor driven
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 is the land 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 mode.However, low parameter boiler and low parameter steam turbine all have the disadvantages 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
The supply of platform medium temperature and medium pressure gas boiler, the actual operating efficiency of these medium temperature and medium pressure low capacity boilers only have 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 lower, to the heat utilization rate wretched insufficiency of by-product gas.For this purpose, related technical personnel are seeking to mention 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 Utilization plan is constructed, Gas Resource utilization efficiency is improved, is current each factory's general concern
Problem has important Practical significance.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of coal gas synergy based on industry dragging to utilize system.
In order to solve the above technical problems, the technical scheme adopted by the invention is that: a kind of coal gas increasing based on industry dragging
Effect utilizes system, including gaspipe network, the first coal gas synergy to utilize system using system and the second coal gas synergy, wherein first
Coal gas synergy includes low parameter gas boiler, low parameter steam turbine using system, and the second coal gas synergy includes senior staff officer using system
Number gas boilers, high-parameter steam turbine, high parameter generator, reheater, gaspipe network respectively with all low parameter gas boilers
It is connected to the gas inlet of all high parameter gas boilers, is low parameter gas boiler and/or the supply combustion of high parameter gas boiler
Material；The main-steam outlet of low parameter gas boiler is connected to the air intake of low parameter steam turbine；The main steaming of high parameter gas boiler
Vapor outlet is connected to the air intake of high-parameter steam turbine, and the air intake of the steam drain of the high-parameter steam turbine and reheater connects
It is logical；The reheater is set in the high-temperature flue of the high parameter gas boiler, the venthole of the reheater and each low ginseng
The steam inlet connection of number steam turbine, the high-parameter steam turbine are connected with the high parameter generator, drive the high parameter
Electrical power generators, the high-parameter steam turbine are back pressure turbine.
Preferably, it is utilized in system in the first coal gas synergy, further includes low parameter condenser, low parameter condensate pump, In
Every one second coal gas synergy utilizes in subsystem, further includes low-pressure coal saver, oxygen-eliminating device, feed pump, and the coal gas synergy utilizes
System further includes condensate tank and condensed water booster pump, wherein the steam drain of each low parameter steam turbine is solidifying with corresponding low parameter
Vapour device, corresponding low parameter condensate pump are sequentially connected to along carbonated drink flow direction, collect the water inlet into condensate tank, the condensation
The water outlet of water tank through the condensed water booster pump respectively with each second coal gas synergy using in subsystem low-pressure coal saver, remove
The water inlet of oxygen device is sequentially communicated；In every one second coal gas synergy using in subsystem, the water outlet of oxygen-eliminating device is given by described
Water pump is connected to the water inlet of high parameter gas boiler, is supplied water to high parameter gas boiler；The low-pressure coal saver is set to institute
In the back-end ductwork for stating high parameter gas boiler, using the fume afterheat of the back-end ductwork as heat source, in low-pressure coal saver
Condensed water is heated.
Preferably, the coal gas synergy further includes condensation water preheater using system, and the condensation water preheater is in carbonated drink
It is set in process 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 with plant area
The steam that jet chimney comes is as heat source.
It preferably, further include that reheated steam collects main pipe, condensed water collects main pipe, wherein each low parameter condensed water
The water outlet of pump first collects main pipe with the condensed water and is connected to, then collects main pipe and the condensate tank by the condensed water
Water inlet connection；The venthole of each reheater first collects main pipe with the reheated steam and is connected to, then is steamed by the reheating
Vapour collects main pipe and is connected to the air intake of each low parameter steam turbine.
Preferably, it is utilized in subsystem in every one second coal gas synergy, further includes removing oxygen evaporator, it is described to remove oxygen evaporator
It is installed in the back-end ductwork of the high parameter gas boiler, is located at after economizer, before air preheater；The oxygen-eliminating device
It for higher-pressure deaerator, is made of deoxygenation head and drum, the drum has the function of steam-water separation, and is used as deaerated water again simultaneously
Case；Drum in the oxygen-eliminating device is connected to by down-comer with the water inlet except oxygen evaporator, the oxygen evaporator that removes
Venthole is connected to by tedge with the rising nozzle of the drum, and a steam/water circulating circuit is formed；In the tedge
Steam water interface, which enters, first carries out steam-water separation after drum, wherein saturation water section drops downward into drum hydrospace, vapor portion
Then enter deoxygenation head, thermal de-aeration carried out to the condensed water for entering oxygen-eliminating device, thus complete boiler feedwater from oxygen removal process.
Preferably, in every one second coal gas synergy using in subsystem, further including that low-pressure coal saver bypasses, the low pressure is saved
The inlet and outlet of coal device bypass are connected to the inlet and outlet of low-pressure coal saver respectively, by the low-pressure coal saver
Road is provided with flow control valve, to control the condensing water flow bypassed by low-pressure coal saver.
Preferably, the main steam system between the high parameter gas boiler and the high-parameter steam turbine uses unit
System, i.e., by individual between the main-steam outlet of each high parameter gas boiler and the air intake of corresponding high-parameter steam turbine
Jet chimney connection；Reheating steam system between the high parameter gas boiler and the high-parameter steam turbine also uses unit
System, i.e., it is logical between the steam inlet of the reheater of each high parameter gas boiler and the steam drain of corresponding high-parameter steam turbine
Cross individual jet chimney connection.
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
Low parameter steam turbine into original system, the low parameter steam turbine in the original system keep 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 is sent after warm reduced pressure treatment, the low parameter steam turbine in the original system is kept substantially
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
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 operating equipment to drag unit and for driven generator
One or both of generating set, wherein industry dragging unit is used to guarantee the normal operation of process upstream facility, and generator
Group is then for balancing residue steam amount；The type selecting capacity of high parameter gas boiler is greater 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 greater 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 corresponding relationships for the steam parameter of the low parameter gas boiler and high parameter gas boiler, if low
Parameter gas boiler is time boiler of 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.
Coal gas synergy based on industry dragging of the invention is had the advantages that using system
1) the coal gas synergy based on industry dragging is constructed to pass through under conditions of not increasing any energy consumption using system
It promotes boiler parameter and adds back pressure type steam turbine generating set, realize being substantially improved for the unit entirety thermal efficiency, ensure that
Factory's original low parameter industry dragging steam turbine is remained stationary operation, and the high parameter back pressure type steam turbine generating set created
Generated energy is that this system mainly increases income newly.
2) system proposed by the present invention has also fully considered the variation of actual operating mode, to reduce energy waste and guarantee
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 greater 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 guarantees 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 guarantee the normal operation of industry dragging steam turbine.
3) design is optimized to boiler heating surface, more conventional gas boiler, this system is in newly-built high parameter coal gas
Reheater is additionally arranged in boiler, except oxygen evaporator, low-pressure coal saver, wherein reheater is completed to back pressure turbine steam discharge
Reheating, ensure that original low parameter industrial steam turbine into vapour condition keep original state, except oxygen evaporator then realize boiler to
Water simplifies deoxygenation vapour source acquisition modes without external vapour source from deoxygenation, in addition, removing the parameter designing of oxygen evaporator and removing
The parameter of oxygen device matches, and compared with conventional pressure and temperature reducing obtains the mode of final deoxygenation steam, substantially reduces energy damage
It loses, heat-economy is substantially improved；And the waste heat of boiler tail flue gas is then rationally utilized in the setting of 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 ".
4) by setting condensation water preheater, gone out using the low-pressure steam in factory in low-pressure steam pipeline to heat condenser
The low-temperature condensate of mouth, to improve the condensing water temperature of low-pressure coal saver entrance, so that low-pressure coal saver wall surface is not in low
Warm acid corrosion guarantees the safe operation of low-pressure coal saver.
5) it is bypassed by setting low-pressure coal saver, and to be provided with flow control valve logical to control in low-pressure coal saver bypass
The condensing water flow of low-pressure coal saver bypass is crossed, and then adjusts the condensing water temperature for entering oxygen-eliminating device, to control the steaming of oxygen-eliminating device
Steam consumption is mainly used for avoiding under some operating conditions, in fact it could happen that since except oxygen evaporator steam production, to be greater than oxygen-eliminating device real
Border steam demand amount so as to cause steam releasing phenomenon.
Detailed description of the invention
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 to indicate that the coal gas synergy based on industry dragging of the embodiment of the present invention utilizes the process flow chart of system.
Specific embodiment
Below with reference to the accompanying drawings come describe it is of the present invention based on industry dragging coal gas synergy utilize 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 appended drawing reference indicates identical part.
In the coal gas synergy of the invention based on industry dragging using in system, low parameter, high parameter refer to the first coal gas
Synergy using system and the second coal gas synergy using system comparatively.Low parameter gas boiler is opposite high parameter coal gas pot
For furnace, correspondingly, corresponding with low parameter gas boiler is low parameter steam turbine and low parameter generator.With high parameter pot
Corresponding furnace is high-parameter steam turbine and high parameter generator.The steam parameter of low parameter gas boiler and high parameter gas boiler
There may be certain corresponding relationships, for example, if low parameter gas boiler is time high temperature sub-high pressure boiler or medium temperature and medium pressure boiler
The even lower boiler of parameter, then high parameter gas boiler can be 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 based on industry dragging using system with reference to the accompanying drawing comprising gaspipe network 5, the
One coal gas synergy utilizes system using system and the second coal gas synergy, wherein
First coal gas synergy includes that multiple first coal gas synergy utilize subsystem, each first coal gas synergy benefit using system
It include low parameter gas boiler, low parameter steam turbine with subsystem.As shown in figure 1, the first coal gas synergy includes low using system
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 utilizes subsystem.It is utilized in subsystem in any first coal gas synergy, the main-steam outlet of low parameter gas boiler
It is connected to the air intake of corresponding low parameter steam turbine.As shown in figure 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.The above is only exemplary illustrations, in fact, the first coal gas synergy can also 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.It is also possible to unit style, i.e. low parameter gas boiler connects one to one with low parameter steam turbine.
Second coal gas synergy includes that multiple second coal gas synergy utilize subsystem using system, is with two second in Fig. 1
Coal gas synergy for subsystem using being illustrated, but the present invention is not limited thereto.Each second coal gas synergy utilizes subsystem
It include high parameter gas boiler, high-parameter steam turbine, high parameter generator, wherein the high-parameter steam turbine is back pressure type
Steam turbine.As shown in figure 1, the second coal gas synergy includes that two the second coal gas synergy utilize subsystem, second coal using system
Gas synergy includes that high parameter gas boiler 6.1, high-parameter steam turbine 7.1 and high parameter connected to it generate electricity using subsystem
Machine 8.1.Another the second coal gas synergy using subsystem include high parameter gas boiler 6.2, high-parameter steam turbine 7.2 and with
Its high parameter generator 8.2 connected.
It is utilized in subsystem in every one second coal gas synergy, the main-steam outlet and high parameter steamer of high parameter gas boiler
The air intake of machine is connected to, and the steam drain of the high-parameter steam turbine is connected to the air intake of each low parameter steam turbine.Preferably, In
Reheater, steam drain elder generation and the reheater of high-parameter steam turbine are additionally provided in the high-temperature flue of high parameter gas boiler
Air intake connection, the venthole of the reheater are connected to the air intake of each low parameter steam turbine again.As shown in Figure 1, in senior staff officer
Reheater 9.1, steam drain elder generation and the reheater 9.1 of high-parameter steam turbine 7.1 are provided in the high-temperature flue of several gas boilers 6.1
Air intake connection, the venthole of reheater 9.1 is connected to the air intake of each low parameter steam turbine again.Similarly, in high parameter
Reheater 9.2, steam drain elder generation and the reheater 9.2 of high-parameter steam turbine 7.2 are provided in the high-temperature flue of gas boiler 6.2
Air intake connection, the venthole of reheater 9.2 are connected to the air intake of each low parameter steam turbine again.
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 based on industry dragging using system, can apply in currently employed low parameter coal gas
In the system reform of boiler.
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.First coal gas synergy is factory's original system using system, and the second coal gas increases
Effect is that factory creates system using system, and when normal operation, the low parameter gas boiler in original system is stopped transport, and displaces coal gas
It is supplied to newly-built high parameter gas boiler, the steam that high parameter gas boiler generates utilizes by high-parameter steam turbine and through again
The low parameter steam turbine into original system is sent after heat, the low parameter steam turbine in original system keeps original state to run substantially；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 is sent after pressure and temperature reducing processing, the low parameter steam turbine in original system keeps former substantially
Shape operation；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, it is utilized in system in the first coal gas synergy, further includes low parameter condenser, low parameter
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 one second coal
Gas synergy utilizes in subsystem, further includes low-pressure coal saver, oxygen-eliminating device, feed pump, as shown in Figure 1, low-pressure coal saver 16.1 is set
It is placed in the back-end ductwork of high parameter gas boiler 6.1, using the fume afterheat of back-end ductwork as heat source, to low-pressure coal saver 16.1
In condensed water preheated.Similarly, low-pressure coal saver 16.2 is set in the back-end ductwork of high parameter gas boiler 6.2,
Using the fume afterheat of back-end ductwork as heat source, the condensed water in low-pressure coal saver 16.2 is heated.
Coal gas synergy is additionally provided with condensate tank 12 and condensed water booster pump 13 using system, wherein each low parameter steamer
The steam drain of machine and corresponding low parameter condenser, corresponding low parameter condensate pump, condensate tank 12 water inlet along carbonated drink
Flow direction is sequentially connected to, and the water outlet of condensate tank 12 then divides through the condensed water booster pump 13 for multiple branches, each branch
All it is sequentially communicated with the water inlet of corresponding low-pressure coal saver, oxygen-eliminating device.The water outlet of each oxygen-eliminating device passes through respective water supply
It pumps and is connected to the water inlet of corresponding high parameter gas boiler, supplied water to high parameter gas boiler.As shown in Figure 1, oxygen-eliminating device
17.1 are supplied water by feed pump 19.1 to high parameter boiler 6.1, and oxygen-eliminating device 17.2 gives high parameter boiler 6.2 by feed pump 19.2
It supplies water.
In one alternate embodiment, economizer is additionally provided in each high parameter gas boiler, each oxygen-eliminating device
Water outlet is connected to by respective feed pump with the water inlet of the economizer in corresponding high parameter gas boiler.As shown in Figure 1,
The water outlet of feed pump 19.1 is connected to the water inlet of the economizer 20.1 in high parameter gas boiler 6.1.Feed pump 19.2
Water outlet is connected to the water inlet of the economizer 20.2 in high parameter gas boiler 6.2.
In one alternate embodiment, it is utilized in subsystem in every one second coal gas synergy, further includes except oxygen evaporator, institute
State and be installed in the back-end ductwork of the high parameter gas boiler except oxygen evaporator, be located at after economizer, air preheater it
Before.As shown in Figure 1, except oxygen evaporator 18.1 is mounted in the back-end ductwork between economizer 20.1 and air preheater 21.1.
It is mounted in the back-end ductwork between economizer 20.2 and air preheater 21.2 except oxygen evaporator 18.2.The oxygen-eliminating device is height
Oxygen-eliminating device is pressed, is made of deoxygenation head and drum, the drum has the function of steam-water separation, and is used as deoxygenation water tank again simultaneously；Institute
It states drum in oxygen-eliminating device to be connected to by down-comer with the water inlet except oxygen evaporator, the venthole except oxygen evaporator
It is connected to by tedge with the rising nozzle of the drum, forms a steam/water circulating circuit；Carbonated drink in the tedge is mixed
Conjunction object, which enters, first carries out steam-water separation after drum, wherein saturation water section drops downward into drum hydrospace, vapor portion then enters
Deoxygenation head carries out thermal de-aeration to the condensed water for entering oxygen-eliminating device, thus complete boiler feedwater from oxygen removal process.
In one alternate embodiment, it is utilized in subsystem in every one second coal gas synergy, further includes by low-pressure coal saver
The inlet and outlet on road, the low-pressure coal saver bypass are connected to the inlet and outlet of low-pressure coal saver respectively, institute
It states and is provided with flow control valve in low-pressure coal saver bypass, to control the condensing water flow bypassed by low-pressure coal saver, in turn
Control the inflow temperature of oxygen-eliminating device, the final steam consumption quantity for controlling oxygen-eliminating device.As shown in Figure 1, low-pressure coal saver bypass 22.1
Inlet and outlet are connected to the inlet and outlet of low-pressure coal saver 16.1 respectively, the low-pressure coal saver bypass 22.1
On be provided with flow control valve 23.1, with control by low-pressure coal saver bypass 22.1 condensing water flow, and then control deoxygenation
The inflow temperature of device 17.1, when to avoid system conditions variation, in fact it could happen that due to being greater than except oxygen evaporator steam production
Oxygen-eliminating device actual steam demand so as to cause steam releasing phenomenon.
In one alternate embodiment, the coal gas synergy further includes condensation water preheater, the condensed water using system
Preheater is set between the condensed water booster pump and the low-pressure coal saver in carbonated drink process, for coming to condensate tank
Condensed water preheated.Condensation water preheater steam inlet be connected to low-pressure steam pipeline in factory, condensation water preheater with
The steam that low-pressure steam pipeline comes in factory is as heat source.As shown in Figure 1, condensation water preheater 14 utilizes low-pressure steam pipeline in factory
15 steam heats condensed water.
It in one alternate embodiment, further include that reheated steam collects main pipe 10, condensed water collects main pipe 11.Each low ginseng
The water outlet of number condensate pump first collects main pipe 11 with condensed water and is connected to, then collects main pipe 11 and condensate tank 12 by condensed water
Water inlet connection.The venthole of each reheater first collects main pipe 10 with reheated steam and is connected to, then is collected by reheated steam
Main pipe 10 is connected to the air intake of each low parameter steam turbine.
In one alternate embodiment, the main steam system between high parameter gas boiler and corresponding high-parameter steam turbine
Using unit style, pass through between the main-steam outlet of each high parameter gas boiler and the air intake of corresponding high-parameter steam turbine
Individual jet chimney connection.
Reheating steam system between high parameter gas boiler and high-parameter steam turbine also uses unit style, each high parameter
Pass through individual steam pipe between the steam inlet of the reheater of gas boiler and the steam drain of corresponding high-parameter steam turbine
Road connection.
In one alternate embodiment, the low parameter steam turbine includes the industry dragging unit for driving operating equipment
With the generating set two types for driven generator.Low parameter steam turbine includes the industry dragging for driving operating equipment
One or both of unit and the generating set for driven generator.Wherein, industry dragging unit is for guaranteeing 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 greater 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 greater than low ginseng
The consumption of several industry dragging units, steam extra at this time is sent into generating set, for generating electricity.
Coal gas synergy based on industry dragging of the invention is had the advantages that using system
1) the coal gas synergy based on industry dragging is constructed to pass through under conditions of not increasing any energy consumption using system
It promotes boiler parameter and adds back pressure type steam turbine generating set, realize being substantially improved for the unit entirety thermal efficiency, ensure that
Factory's original low parameter industry dragging steam turbine is remained stationary operation, and the high parameter back pressure type steam turbine generating set created
Generated energy is that this system mainly increases income newly.
2) system proposed by the present invention has also fully considered the variation of actual operating mode, to reduce energy waste and guarantee
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 greater 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 guarantees 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 guarantee the normal operation of industry dragging steam turbine.
3) design is optimized to boiler heating surface, more conventional gas boiler, this system is in newly-built high parameter coal gas
Reheater is additionally arranged in boiler, except oxygen evaporator, low-pressure coal saver, wherein reheater is completed to back pressure turbine steam discharge
Reheating, ensure that original low parameter industrial steam turbine into vapour condition keep original state, except oxygen evaporator then realize boiler to
Water simplifies deoxygenation vapour source acquisition modes without external vapour source from deoxygenation, in addition, removing the parameter designing of oxygen evaporator and removing
The parameter of oxygen device matches, and compared with conventional pressure and temperature reducing obtains the mode of final deoxygenation steam, substantially reduces energy damage
It loses, heat-economy is substantially improved；And the waste heat of boiler tail flue gas is then rationally utilized in the setting of 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 ".
4) by setting condensation water preheater, gone out using the low-pressure steam in factory in low-pressure steam pipeline to heat condenser
The low-temperature condensate of mouth, to improve the condensing water temperature of low-pressure coal saver entrance, so that low-pressure coal saver wall surface is not in low
Warm acid corrosion guarantees the safe operation of low-pressure coal saver.
5) it is bypassed by setting low-pressure coal saver, and to be provided with flow control valve logical to control in low-pressure coal saver bypass
The condensing water flow of low-pressure coal saver bypass is crossed, and then adjusts the condensing water temperature for entering oxygen-eliminating device, to control the steaming of oxygen-eliminating device
Steam consumption is mainly used for avoiding under some operating conditions, in fact it could happen that since except oxygen evaporator steam production, to be greater than oxygen-eliminating device real
Border steam demand amount so as to cause steam releasing phenomenon.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of coal gas synergy based on industry dragging utilizes system, which is characterized in that including gaspipe network, the first coal gas synergy
System is utilized using system and the second coal gas synergy, wherein
First coal gas synergy includes low parameter gas boiler, low parameter steam turbine using system,
Second coal gas synergy includes high parameter gas boiler, high-parameter steam turbine, high parameter generator, reheater using system,
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；
The main-steam outlet of low parameter gas boiler is connected to the air intake of low parameter steam turbine；
The main-steam outlet of high parameter gas boiler is connected to the air intake of high-parameter steam turbine, and the row of the high-parameter steam turbine
Steam ports is connected to the air intake of reheater；
The reheater is set in the high-temperature flue of the high parameter gas boiler, the venthole of the reheater and each low ginseng
The steam inlet connection of number steam turbine, the high-parameter steam turbine are connected with the high parameter generator, drive the high parameter
Electrical power generators,
The high-parameter steam turbine is back pressure turbine,
Wherein, when normal operation, the first coal gas synergy is stopped transport using the low parameter gas boiler in system, displaces gas supply
The high parameter gas boiler of system is utilized to the second coal gas synergy, the steam that high parameter gas boiler generates passes through high parameter steamer
Machine, which is utilized and sent after reheated device to the first coal gas synergy, utilizes the low parameter steam turbine in system, the first coal gas synergy benefit
Original state is kept to run substantially with the low parameter steam turbine in system；
When the second coal gas synergy is broken down using the high-parameter steam turbine in system, the steam of high parameter gas boiler generation
It is sent after the processing of turbine bypass system pressure and temperature reducing to the first coal gas synergy using the low parameter steam turbine in system, it is described
First coal gas synergy keeps original state to run substantially using the low parameter steam turbine in system；
When the second coal gas synergy is broken down using the high parameter gas boiler in system, the second coal gas synergy utilizes system
High parameter gas boiler is stopped transport, and the first coal gas synergy is put into operation using the low parameter gas boiler in system, the first coal gas synergy benefit
Steam the first coal gas synergy of supply generated with the low parameter gas boiler in system is whole using the low parameter steam turbine in system
The first coal gas synergy is covered using system reinstatement operation.
2. the coal gas synergy according to claim 1 based on industry dragging utilizes system, which is characterized in that
In the first coal gas synergy using in system, further including low parameter condenser, low parameter condensate pump,
In every one second coal gas synergy using in subsystem, further including low-pressure coal saver, oxygen-eliminating device, feed pump,
The coal gas synergy further includes condensate tank and condensed water booster pump using system,
Wherein, the steam drain of each low parameter steam turbine is with corresponding low parameter condenser, corresponding low parameter condensate pump along vapour
Water flow collects the water inlet into condensate tank to being sequentially connected to, and the water outlet of the condensate tank is pressurized through the condensed water
Pump is sequentially communicated with each second coal gas synergy using the water inlet of low-pressure coal saver, oxygen-eliminating device in subsystem respectively；
In every one second coal gas synergy using in subsystem, the water outlet of oxygen-eliminating device passes through the feed pump and high parameter coal gas pot
The water inlet of furnace 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.
3. the coal gas synergy according to claim 2 based on industry dragging utilizes system, which is characterized in that further include condensation
Water preheater,
The condensation water preheater is set between the condensed water booster pump and the low-pressure coal saver in carbonated drink process, 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.
4. the coal gas synergy according to claim 2 based on industry dragging utilizes system, which is characterized in that
It further include that reheated steam collects main pipe, 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；
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.
5. the coal gas synergy according to claim 2 based on industry dragging utilizes system, which is characterized in that
Every one second coal gas synergy using in subsystem, further include except oxygen evaporator, it is described except oxygen evaporator be installed on it is described
In the back-end ductwork of high parameter gas boiler, it is located at after economizer, before air preheater；
The oxygen-eliminating device is higher-pressure deaerator, is made of deoxygenation head and drum, the drum has the function of steam-water separation, and simultaneously
It is used as deoxygenation water tank again；
Drum in the oxygen-eliminating device is connected to by down-comer with the water inlet except oxygen evaporator, the oxygen evaporator that removes
Venthole is connected to by tedge with the rising nozzle of the drum, and a steam/water circulating circuit is formed；
Steam water interface in the tedge, which enters, first carries out steam-water separation after drum, wherein saturation water section drops downward into vapour
Wrap hydrospace, vapor portion then enters deoxygenation head, thermal de-aeration is carried out to the condensed water for entering oxygen-eliminating device, thus complete boiler to
Water from oxygen removal process.
6. the coal gas synergy according to claim 2 based on industry dragging utilizes system, which is characterized in that
It is utilized in subsystem in every one second coal gas synergy, further includes low-pressure coal saver bypass, the low-pressure coal saver bypass
Inlet and outlet are connected to the inlet and outlet of low-pressure coal saver respectively, are provided in the low-pressure coal saver bypass
Flow control valve, to control the condensing water flow bypassed by low-pressure coal saver.
7. the coal gas synergy according to claim 1 based on industry dragging utilizes system, which is characterized in that
Main steam system between the high parameter gas boiler and the high-parameter steam turbine uses unit style, i.e. each senior staff officer
It is connected to by individual jet chimney between the main-steam outlet and the air intake of corresponding high-parameter steam turbine of number gas boiler；
Reheating steam system between the high parameter gas boiler and the high-parameter steam turbine also uses unit style, i.e., each
By individual between the steam inlet of the reheater of high parameter gas boiler and the steam drain of corresponding high-parameter steam turbine
Jet chimney connection.
8. the coal gas synergy according to claim 1 based on industry dragging utilizes system, which is characterized in that low parameter steamer
Machine includes industry dragging one or both of the unit and the generating set for driven generator for driving operating equipment,
Wherein, industry dragging unit is used to guarantee the normal operation of process upstream facility, and generating set be then used to balance it is more than needed
Quantity of steam；
The type selecting capacity of high parameter gas boiler is greater 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 greater than the industry dragging unit of low parameter
Consumption, steam extra at this time is sent into generating set, for generating electricity.
9. the coal gas synergy according to claim 1 based on industry dragging utilizes system, which is characterized in that the low parameter
There are corresponding relationships for the steam parameter of gas boiler and high parameter gas boiler, if low parameter gas boiler is time high temperature sub-high pressure
The boiler of boiler, medium temperature and medium pressure boiler or more low parameter, then high parameter gas boiler is high-temperature high-pressure boiler, superhigh-pressure high-temp pot
The boiler of furnace, superhigh temperature superpressure boiler or more high parameter.
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| CN111058909B (en) * | 2019-12-12 | 2024-02-02 | 上海发电设备成套设计研究院有限责任公司 | Low-pressure steam Rankine cycle power generation system and method |
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