CN109372602A - A kind of biomass incinerator and coal unit steam coupled system and method - Google Patents
A kind of biomass incinerator and coal unit steam coupled system and method Download PDFInfo
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- CN109372602A CN109372602A CN201811043765.8A CN201811043765A CN109372602A CN 109372602 A CN109372602 A CN 109372602A CN 201811043765 A CN201811043765 A CN 201811043765A CN 109372602 A CN109372602 A CN 109372602A
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- 239000003245 coal Substances 0.000 title claims abstract description 74
- 239000002028 Biomass Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000002918 waste heat Substances 0.000 claims abstract description 154
- 238000000605 extraction Methods 0.000 claims abstract description 132
- 238000010248 power generation Methods 0.000 claims abstract description 14
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims description 17
- 238000005086 pumping Methods 0.000 claims 2
- 238000010168 coupling process Methods 0.000 description 24
- 230000008878 coupling Effects 0.000 description 23
- 238000005859 coupling reaction Methods 0.000 description 23
- 239000010813 municipal solid waste Substances 0.000 description 13
- 239000002699 waste material Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000010025 steaming Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002154 agricultural waste Substances 0.000 description 2
- 239000002361 compost Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 244000068988 Glycine max Species 0.000 description 1
- 235000010469 Glycine max Nutrition 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000010907 stover Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- 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
-
- 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
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The present invention relates to the system and method that a kind of biomass incinerator is coupled with coal unit steam, multiple bypass lines are added on the steam (vapor) outlet pipeline of existing waste heat boiler, respectively enter the different sections and high pressure cylinder blow-off line of level-one extraction line by different bypass lines according to the big minor adjustment steam of waste heat boiler generation quantity of steam.When quantity of steam is smaller, steam enters the level-one extraction line after extraction check valve, instead of No. 1 original high-pressure heater steam extraction；When quantity of steam increases, when No. 1 high-pressure heater steam extraction cannot dissolve steam completely, extra steam enters the level-one extraction line before extraction check valve by filling valve, and returns to coal unit steam turbine high pressure cylinder and carry out acting power generation；When quantity of steam continues growing, substitutes No. 1 high-pressure heater steam extraction and enter coal unit steam turbine high pressure cylinder mode of both doing work and combine when can not dissolve steam completely, extra steam is coupled through temperature-decreased pressure reducer with the steam discharge in high pressure cylinder blow-off line.
Description
Technical field
The invention belongs to field of thermal power, more specifically to a kind of biomass incinerator and coal unit steam coupling
The system and method for conjunction.
Background technique
As social population increases, industry and agricultural development, house refuse, industry and agricultural waste are also growing day by day.Mesh
Before, the method for garbage disposal mainly has landfill, compost, burning etc. a variety of, but is the mankind by garbage harmless, recycling treatment
The target of garbage disposal.Burning is one of the important means of rubbish processing to be harmless, is had compared with Other Waste processing mode
Short processing time, decrement are significant, innoxious more thoroughly and the advantages that recyclable rubbish waste gas of incineration, obtain extensively in countries in the world
General application.
China is as a large agricultural country, other than the house refuse for being mainly derived from city, also from rural area
Agricultural crop straw, such as corn stover, soybean stalk etc..These agricultural wastes of compost treatment not only take up an area greatly, and when needing
Between it is long, therefore, burning be handle these rubbish best way.But field burns and not only causes environmental pollution, and burns
The heat of generation is directly wasted.Biomass incinerator and coal unit coupled electricity-generation can crack the burning of stalk field, sludge rubbish
The governance problems such as rubbish besieged city are a kind of effective means for improving Biomass Energy Utilization efficiency, reducing disposal of pollutants.
Waste incinerator is disposed with the waste heat boiler of superheater using burning heat for the purpose of handling rubbish in furnace,
The generating efficiency of waste-heat oven is very low, 18%~25%, far below the generating efficiency of efficient fuel coal unit about 45%.Meanwhile rubbish
There are equipment investment height, heating surface high temperature corrosion, tail portion low-temperature corrosion, dioxin flue gas emission index errors etc. to lack for rubbish incinerator
It falls into, and the flue gas purification systems such as individual desulphurization and denitration, dedusting need to be equipped with, equipment cost and operation and maintenance cost are high.Cause
This, it is effective one of means for solving waste incinerator drawbacks described above that waste incinerator is combined with coal-burning boiler.
For example, Chinese Patent Application No. CN108266718A discloses a kind of waste incinerator low-lying level working medium and coal-fired pot
The high level of furnace coupling utilizes system, the another way water supply of the outlet water conduits and high-pressure heater of the waste incinerator of the system
Pipeline converges to be connected with the tail portion economizer of coal-burning boiler afterwards, realizes the hot water that waste incinerator generates being introduced into coal-fired pot
The economizer of furnace is to improve the temperature that economizer entrance is intake (referring to Fig. 1).
In another example Chinese Patent Application No. CN 107559058A discloses a kind of waste incinerator middle pressure steam and coal burning machine
The Thermal-mechanical Coupling electricity generation system of group, including rubbish furnace body, feed pump, low-pressure heater, oxygen-eliminating device, high-pressure heater, water supply
Pipeline, coal unit, main steam line, reheater piping, ultra-high pressure cylinder, high pressure cylinder, condenser, level-one bleed steam pipework and second level
Bleed steam pipework, high-pressure heater include level-one high-pressure heater and second level high-pressure heater interconnected, the ultra-high pressure cylinder
High pressure cylinder is connected, feed pump connects oxygen-eliminating device by piping connection low-pressure heater, low-pressure heater by the road, and oxygen-eliminating device is through pipe
Road connects high-pressure heater, and high-pressure heater connects coal unit through supply line, and coal unit connects main steam line, main steaming
Steam pipe road connects ultra-high pressure cylinder, and ultra-high pressure cylinder connects three-level high-pressure heater through level-one bleed steam pipework, and ultra-high pressure cylinder is taken out through second level
Vapor pipeline connects second level high-pressure heater, and coal unit connects high pressure cylinder by reheater piping, and high pressure cylinder connects condenser, institute
The steam (vapor) outlet for stating rubbish furnace body is connected (referring to fig. 2) through pipeline with level-one bleed steam pipework.The Thermal-mechanical Coupling electricity generation system will
The steam that refuse furnace burning generates is coupled into steam turbine therrmodynamic system, but the steam is used only for reducing steam turbine steam extraction, improves combustion
The feed temperature of coal burning boiler.It, cannot be complete only by steam turbine steam extraction when the steam that the waste heat boiler burnt away the refuse generates is excessive
It totally disappeared when receiving the steam, the utilization rate that this is bound to cause the steam of waste heat boiler generation is not high, causes the thermal energy of steam unrestrained in vain
Take.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of biomass incinerators with what coal unit steam coupled is
System and method, the method for operation of the size cases Automatic Optimal regulating system of the quantity of steam according to caused by waste heat boiler,
So that the energy for the steam that waste heat boiler generates is fully used, realize that energy utilization maximizes.
In order to achieve the above objectives, technical scheme is as follows:
Biomass incinerator and coal unit steam coupled system of the invention includes: waste heat boiler, coal unit steam turbine
High pressure cylinder, the level-one extraction line being connected with coal unit steam turbine high pressure cylinder, wherein the level-one extraction line is provided with steam extraction
Non-return valve, the waste heat boiler by waste heat boiler steam (vapor) outlet main pipeline and waste heat boiler steam (vapor) outlet first branch pipeline with
Level-one extraction line after extraction check valve is connected, wherein one end of the waste heat boiler steam (vapor) outlet first branch pipeline and institute
It states waste heat boiler steam (vapor) outlet main pipeline to be connected, the other end is connected with the level-one extraction line after extraction check valve, in this way, waste heat
The steam that boiler generates passes sequentially through the waste heat boiler steam (vapor) outlet main pipeline and the waste heat boiler steam (vapor) outlet first
Road pipeline is coupled into the level-one extraction line after the extraction check valve with steam extraction therein.
The waste heat boiler also passes through waste heat boiler steam (vapor) outlet main pipeline, waste heat boiler steam (vapor) outlet first branch pipeline
It is connected with bypass duct with the level-one extraction line before extraction check valve, wherein one end of the bypass duct and the waste heat pot
Furnace steam (vapor) outlet first branch pipeline is connected, and the other end is connected with the level-one extraction line before extraction check valve, in this way, waste heat pot
The steam that furnace generates passes sequentially through the waste heat boiler steam (vapor) outlet main pipeline, the waste heat boiler steam (vapor) outlet first branch pipe
Road and the bypass duct enter the level-one extraction line before the extraction check valve, high subsequently into the coal unit steam turbine
Cylinder pressure carries out acting power generation.
The waste heat boiler also passes through waste heat boiler steam (vapor) outlet main pipeline and waste heat boiler steam (vapor) outlet second branch pipe
Road is connected with high pressure cylinder blow-off line, wherein the high pressure cylinder blow-off line is connected with the coal unit steam turbine high pressure cylinder, institute
The one end for stating waste heat boiler steam (vapor) outlet second branch pipeline is connected with the waste heat boiler steam (vapor) outlet main pipeline, the other end with
The high pressure cylinder blow-off line is connected, in this way, the steam that waste heat boiler generates passes sequentially through the waste heat boiler steam (vapor) outlet master
Pipeline and the waste heat boiler steam (vapor) outlet second branch pipeline enter the high pressure cylinder blow-off line and couple with steam discharge therein.
It is provided with vapour pressure monitor on the waste heat boiler steam (vapor) outlet main pipeline, for detecting the waste heat boiler steam
Export the pressure size of steam in main pipeline.
Filling valve is provided on the bypass duct, for controlling the steam in the bypass duct into the coal burning machine
Group steam turbine high pressure cylinder.
It is provided with regulating valve on the waste heat boiler steam (vapor) outlet second branch pipeline, adjusts and enters waste heat boiler steaming
The steam flow rate of vapor outlet second branch pipeline.
It is provided with temperature-decreased pressure reducer on the waste heat boiler steam (vapor) outlet second branch pipeline, for the waste heat boiler
Steam in steam (vapor) outlet second branch pipeline carries out pressure and temperature reducing to enter the high pressure cylinder blow-off line and row therein
Vapour coupling.Relative to the regulating valve, the temperature-decreased pressure reducer is located at the waste heat boiler steam (vapor) outlet second branch pipeline
Downstream.
The present invention also provides a kind of methods that biomass incinerator is coupled with coal unit steam, this method comprises:
The steam for generating waste heat boiler is successively through waste heat boiler steam (vapor) outlet main pipeline and waste heat boiler steam (vapor) outlet the
One bypass line enters the level-one extraction line after extraction check valve, is then coupled with steam extraction therein；
The steam for generating waste heat boiler successively passes through waste heat boiler steam (vapor) outlet main pipeline, waste heat boiler steam (vapor) outlet the
One bypass line and bypass duct enter the level-one extraction line before extraction check valve, subsequently into coal unit steam turbine high pressure cylinder
Carry out acting power generation.
This method further comprises: make waste heat boiler generate steam successively pass through waste heat boiler steam (vapor) outlet main pipeline and
Waste heat boiler steam (vapor) outlet second branch pipeline enters the high pressure cylinder blow-off line being connected with coal unit steam turbine high pressure cylinder, then
It is coupled with steam discharge therein.
In the method that biomass incinerator of the invention is coupled with coal unit steam, as waste heat boiler steam (vapor) outlet master
When steam pressure in pipeline is less than first pressure predetermined value, the filling valve and waste heat boiler steam (vapor) outlet on bypass duct are closed
Regulating valve on second branch pipeline makes steam completely into the level-one extraction line and steam extraction coupling therein after extraction check valve
It closes.
In the method that biomass incinerator of the invention is coupled with coal unit steam, as waste heat boiler steam (vapor) outlet master
When steam pressure in pipeline is greater than first pressure predetermined value less than second pressure predetermined value, the filling on bypass duct is opened
Valve, and the regulating valve on waste heat boiler steam (vapor) outlet second branch pipeline is closed, a part for the steam for generating waste heat boiler
Into the level-one extraction line after extraction check valve, another part enters the level-one extraction line before extraction check valve, then into
Enter the acting power generation of coal unit steam turbine high pressure cylinder.
In the method that biomass incinerator of the invention is coupled with coal unit steam, as waste heat boiler steam (vapor) outlet master
When steam pressure in pipeline is greater than second pressure predetermined value, the filling valve and waste heat boiler steam on bypass duct are opened simultaneously
The regulating valve on second branch pipeline is exported, a part for the steam for generating waste heat boiler enters the level-one after extraction check valve
Extraction line, the level-one extraction line that another part enters before extraction check valve eventually enter into the acting of coal unit steam turbine high pressure cylinder
Power generation, some enters the high pressure cylinder blow-off line being connected with coal unit steam turbine high pressure cylinder and couples with steam discharge therein.
Biomass incinerator and coal unit steam coupled system of the invention is the steam (vapor) outlet in existing waste heat boiler
Multiple bypass lines are added on pipeline, according to waste heat boiler generate quantity of steam size (in steam (vapor) outlet pipeline steam pressure and
Quantity of steam is directly proportional), it adjusts steam and is respectively enterd and coal unit steam turbine high pressure cylinder by different steam (vapor) outlet bypass lines
The different sections and high pressure cylinder blow-off line of connected level-one extraction line, when quantity of steam (i.e. steam pressure) is smaller, steam is complete
The level-one extraction line that portion enters after extraction check valve is coupled with steam extraction therein, instead of No. 1 original high-pressure heater steam extraction；
When quantity of steam increases, when No. 1 high-pressure heater steam extraction cannot dissolve the coupling steam completely, extra steam passes through steam extraction check
Level-one extraction line before valve enters coal unit steam turbine high pressure cylinder and carries out acting power generation；When quantity of steam continues to increase, No. 1 is substituted
High-pressure heater steam extraction and enters coal unit steam turbine high pressure cylinder mode of both doing work and combines when can not dissolve the steam completely,
Extra steam enters high pressure cylinder blow-off line, couples after temperature-decreased pressure reducer with steam discharge therein, eventually enters into No. 2 high pressures
Heater or cold section of coal-burning boiler reheater overcome the steam of prior art single utilization waste heat boiler generation, work as quantity of steam
When larger, steam cannot dissolve the defect of coupling completely.Invention achieves following significant technologies to imitate compared with prior art
Fruit:
(1) steam caused by waste heat boiler can substitute No. 1 high-pressure heater steam extraction but also return to coal unit steam turbine
High pressure cylinder acting power generation has subversiveness to recognize and use traditional high-pressure heater extraction opening, substantially increases
The whole coupling utilization efficiency of biomass thermal energy；
(2) novel steam coupling process is realized, due to high-pressure heater steam extraction, returns to coal unit steam turbine high pressure cylinder
Acting generates electricity and carry out consumption coupling into the steam that high pressure cylinder steam discharge can generate waste heat boiler, with single coupled modes
It compares, the present invention is flexible with steam consumption coupled modes, biomass processes amount and consumption coupling steam amount are big, can adapt to fire
The characteristics of coal unit various loads.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is the attached drawing of technology to do simply to introduce, it is clear that drawings discussed below be only to some embodiments of the present invention, for
For those of ordinary skill in the art, under the preceding topic not made the creative labor, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 schematically shows one embodiment of the prior art.
Fig. 2 schematically shows another embodiments of the prior art.
Fig. 3 schematically shows the structure of biomass incinerator and coal unit steam coupled system of the invention.
Specific embodiment
" first pressure predetermined value " is the steam generated according to No. 1 high-pressure heater consumption coupling waste heat boiler in the present invention
Amount setting, the quantity of steam that No. 1 high-pressure heater consumption coupling waste heat boiler generates reaches corresponding waste heat boiler when maximum value
Vapour pressure force value in steam (vapor) outlet main pipeline 9 is first pressure predetermined value.
" second pressure predetermined value " is the steam generated according to No. 1 high-pressure heater consumption coupling waste heat boiler in the present invention
It measures and coal unit steam turbine high pressure cylinder is dissolved by level-one extraction line and couples what the quantity of steam that waste heat boiler generates was set, 1
The quantity of steam and coal unit steam turbine high pressure cylinder that number high-pressure heater consumption coupling waste heat boiler generates pass through level-one extraction line
The quantity of steam that consumption coupling waste heat boiler generates all reaches steaming when maximum value in corresponding waste heat boiler steam (vapor) outlet main pipeline 9
Vapour pressure force value is second pressure predetermined value.
" upstream " and " downstream " is defined according to the flow direction of fluid in pipeline in the present invention.
" the level-one extraction line before extraction check valve " and " the level-one extraction line after extraction check valve " is in the present invention
It is defined according to the flow direction of steam extraction in level-one extraction line, from steam extraction from the flow direction in level-one extraction line,
Level-one extraction line between extraction check valve and coal unit steam turbine high pressure cylinder is known as " the level-one extraction steam pipe before extraction check valve
Road ", the level-one extraction line between extraction check valve and No. 1 high-pressure heater are known as " the level-one extraction steam pipe after extraction check valve
Road ".
In order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be readily apparent from understanding, tie below
Attached drawing is closed, the present invention is further explained.
As shown in Fig. 3, in the present embodiment, biomass incinerator and coal unit steam coupled system include incinerator
1, waste heat boiler 2 and coal unit steam turbine high pressure cylinder 3.Incinerator 1 is connected with waste heat boiler 2 by flue 12.Waste heat pot
Furnace 2 is connected with feedwater piping 13.Coal unit steam turbine high pressure cylinder 3 connects one end and the high pressure cylinder gland steam exhauster of level-one extraction line 10
The one end in road 11, the other end of level-one extraction line 10 connect No. 1 high-pressure heater, and the other end of high pressure cylinder blow-off line 11 connects
Connect No. 2 high-pressure heaters and cold section of coal-burning boiler reheater.Extraction check valve 4 is provided on level-one extraction line 10.
Waste heat boiler 2 connects waste heat boiler steam (vapor) outlet main pipeline 9, and waste heat boiler steam (vapor) outlet main pipeline 9 is used for will be remaining
The steam output that heat boiler 2 generates, waste heat boiler steam (vapor) outlet main pipeline 9 are also connected with waste heat boiler steam (vapor) outlet first branch pipe
The one end in road 91, such as connected by triplet type pipeline.The other end of waste heat boiler steam (vapor) outlet first branch pipeline 91 connects
Level-one extraction line 10 after extraction check valve (4), such as connected by triplet type pipeline.Waste heat boiler steam (vapor) outlet first
Road pipeline 91 is also connected with one end of bypass duct 911, such as is connected by triplet type pipeline.The other end of bypass duct 911 connects
Level-one extraction line 10 before connecing extraction check valve (4), such as connected by triplet type pipeline.
As shown in Fig. 3, in the present embodiment, waste heat boiler 2 is also connected with waste heat boiler steam (vapor) outlet second branch pipeline
92 one end, such as connected by triplet type pipeline.The other end of waste heat boiler steam (vapor) outlet second branch pipeline 92 connects high
Cylinder pressure blow-off line 11, such as connected by triplet type pipeline.
It is provided with vapour pressure monitor 7 on waste heat boiler steam (vapor) outlet main pipeline 9, for detecting waste heat boiler steam (vapor) outlet master
The pressure size of steam in pipeline 9.Filling valve 5 is provided on bypass duct 911, for adjusting the steam in bypass duct,
Level-one extraction line before making it through extraction check valve enters the coal unit steam turbine high pressure cylinder and carries out acting power generation.Waste heat
It is additionally provided with regulating valve 6 and temperature-decreased pressure reducer 8 on Boiler Steam outlet second branch pipeline 92, relative to regulating valve 6, desuperheat subtracts
Depressor 8 is located at the downstream of waste heat boiler steam (vapor) outlet second branch pipeline 92.Regulating valve 6 enters waste heat boiler steam for adjusting
Export the quantity of steam of second branch pipeline.Temperature-decreased pressure reducer 8 is used to make the steaming in waste heat boiler steam (vapor) outlet second branch pipeline
Then vapour pressure and temperature reducing enters 2 grades of high-pressure heaters or cold section of coal-burning boiler reheater by high pressure cylinder blow-off line 11.
The working method of biomass incinerator of the invention and coal unit steam coupled system is as follows:
The flue gas that biomass carries out burning generation in incinerator 1 enters waste heat boiler 2 by exhaust gases passes 12, to passing through
The water that feedwater piping 13 is transported in waste heat boiler 2 is heated, and is allowed to be converted into the steam of high temperature and pressure, the steam then into
Enter waste heat boiler steam (vapor) outlet main pipeline 9, when vapour pressure monitor 7 detects the steam in waste heat boiler steam (vapor) outlet main pipeline 9
When pressure is less than first pressure predetermined value, filling valve 5 and regulating valve 6 are closed, in this way, the steam that waste heat boiler generates all passes through
Waste heat boiler steam (vapor) outlet first branch pipeline 91 is into the level-one extraction line 10 after coal unit extraction check valve 4 and wherein
Steam extraction coupling, eventually enter into No. 1 high-pressure heater.
As the quantity of steam that waste heat boiler generates increases, when vapour pressure monitor 7 detects that waste heat boiler steam (vapor) outlet is responsible for
When steam pressure in road 9 is greater than first pressure predetermined value but is less than second pressure predetermined value, filling valve 5 is gradually opened, still
Regulating valve 6 is still within closed state.In this way, a part of the steam in waste heat boiler steam (vapor) outlet first branch pipeline 91 is logical
Cross bypass channel 911 enter extraction check valve 4 before level-one steam extraction channel 10, eventually enter into coal unit steam turbine high pressure cylinder 3 into
Row acting generates electricity, and another part of the steam in waste heat boiler steam (vapor) outlet first branch pipeline 91 still enters extraction check valve
Level-one extraction line 10 after 4 eventually enters into No. 1 high-pressure heater.
As the quantity of steam that waste heat boiler generates further increases, when vapour pressure monitor 7 detects that waste heat boiler steam goes out
When steam pressure in mouth main pipeline 9 is greater than second pressure predetermined value, regulating valve 6 is gradually opened, filling valve 5 is also at out at this time
Open state.In this way, a part of the steam in waste heat boiler steam (vapor) outlet main pipeline 9 enters waste heat boiler steam (vapor) outlet second
Then road pipeline 92 enters high pressure cylinder exhaust passage 11 after temperature-decreased pressure reducer 8 carries out pressure and temperature reducing and couples with steam discharge therein,
Eventually enter into No. 2 high-pressure heaters or cold section of coal-burning boiler reheater.Steam into No. 2 high-pressure heaters can substitute steamer
2 grades of steam extractions of machine enter steam turbine intermediate pressure cylinder after the heating of coal-burning boiler reheater into cold section of coal-burning boiler reheater of steam
Acting.Another part of steam in waste heat boiler steam (vapor) outlet main pipeline 9 still enters waste heat boiler steam (vapor) outlet first
Road pipeline 91, a part of the steam in waste heat boiler steam (vapor) outlet first branch pipeline 91 enter one after extraction check valve 4
Grade extraction line 10, eventually enter into No. 1 high-pressure heater, the steam in waste heat boiler steam (vapor) outlet first branch pipeline 91 it is another
A part enters the level-one steam extraction channel 10 before extraction check valve 4 by bypass channel 911, and it is high to eventually enter into coal unit steam turbine
Cylinder pressure carries out acting power generation.
Pass through above description, it can be seen that the present invention be the blade strength in former coal unit steam turbine, cylinder pressurization ratio,
Under the premise of the safety of shafting vibration, thrust etc. is protected, the preferred steam coupling for generating waste heat boiler introduces energy
The relatively high coal unit steam turbine high pressure cylinder level-one extraction line of utilization efficiency, instead of No. 1 original high-pressure heater steam extraction；When
Quantity of steam increases, and when No. 1 high-pressure heater steam extraction cannot dissolve coupling steam completely, extra steam is introduced coal unit vapour
Machine high pressure cylinder carries out acting power generation；When quantity of steam further increases, above two mode still cannot dissolve coupling steam completely
When, extra steam is coupled through pressure and temperature reducing with high pressure cylinder steam discharge.The mode of this Multiple modality consumption coupling steam, greatly
The whole coupling utilization efficiency of biomass thermal energy is improved greatly.Therefore, invention achieves following significant technical effects:
1. steam is coupled with the steam extraction in level-one extraction line, instead of original when the quantity of steam that waste heat boiler generates is smaller
No. 1 high-pressure heater steam extraction come；
2. when the quantity of steam that waste heat boiler generates increases, No. 1 high-pressure heater steam extraction cannot dissolve the coupling steam completely
When, extra steam enters coal unit steam turbine high pressure cylinder and carries out acting power generation；
3. when the quantity of steam that waste heat boiler generates continues to increase, No. 1 high-pressure heater steam extraction and entrance coal unit steam turbine
When the two ways joint that high pressure cylinder does work can not dissolve the steam completely, extra steam is after temperature-decreased pressure reducer
It is incorporated to high pressure cylinder steam discharge, eventually enters into No. 2 high-pressure heaters or cold section of coal-burning boiler reheater.Into No. 2 high-pressure heaters
Steam can substitute 2 grades of steam extractions of steam turbine, enter vapour after the heating of coal-burning boiler reheater into cold section of reheater of steam
The acting of machine intermediate pressure cylinder.
Basic principles and main features and advantages of the present invention of the invention have been shown and described above.The skill of the industry
Art personnel it should be appreciated that the present invention is not limited to the above embodiments, the above embodiments and description only describe
The principle of the present invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these
Changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and
Its equivalent thereof.
Claims (11)
1. a kind of biomass incinerator and coal unit steam coupled system, the system further include: waste heat boiler (2), coal burning machine
Group steam turbine high pressure cylinder (3), the level-one extraction line (10) being connected with coal unit steam turbine high pressure cylinder (3), wherein the level-one is taken out
Extraction check valve (4) are provided on steam pipe road (10),
It is characterized in that,
The waste heat boiler (2) passes through waste heat boiler steam (vapor) outlet main pipeline (9) and waste heat boiler steam (vapor) outlet first branch pipe
Road (91) is connected with the level-one extraction line (10) after extraction check valve (4), wherein the waste heat boiler steam (vapor) outlet first
One end of road pipeline (91) is connected with the waste heat boiler steam (vapor) outlet main pipeline (9), after the other end and extraction check valve (4)
Level-one extraction line (10) is connected, in this way, the steam that waste heat boiler (2) generates passes sequentially through the waste heat boiler steam (vapor) outlet master
Pipeline (9) and the waste heat boiler steam (vapor) outlet first branch pipeline (91) enter the level-one pumping after the extraction check valve (4)
Steam pipe road (10) is coupled with steam extraction therein,
The waste heat boiler (2) also passes through waste heat boiler steam (vapor) outlet main pipeline (9), waste heat boiler steam (vapor) outlet first branch pipe
Road (91) and bypass duct (911) are connected with the level-one extraction line (10) before extraction check valve (4), wherein the bypass duct
(911) one end is connected with the waste heat boiler steam (vapor) outlet first branch pipeline (91), before the other end and extraction check valve (4)
Level-one extraction line (10) be connected, in this way, waste heat boiler (2) generate steam pass sequentially through the waste heat boiler steam (vapor) outlet
Main pipeline (9), the waste heat boiler steam (vapor) outlet first branch pipeline (91) and the bypass duct (911) enter the steam extraction
Level-one extraction line (10) before non-return valve (4) does work subsequently into the coal unit steam turbine high pressure cylinder (3).
2. biomass incinerator according to claim 1 and coal unit steam coupled system, which is characterized in that described remaining
Heat boiler (2) also by waste heat boiler steam (vapor) outlet main pipeline (9) and waste heat boiler steam (vapor) outlet second branch pipeline (92) and
High pressure cylinder blow-off line (11) is connected, wherein the high pressure cylinder blow-off line (11) and the coal unit steam turbine high pressure cylinder (3)
It is connected, one end of the waste heat boiler steam (vapor) outlet second branch pipeline (92) and the waste heat boiler steam (vapor) outlet main pipeline
(9) it is connected, the other end is connected with the high pressure cylinder blow-off line (11), in this way, the steam that waste heat boiler (2) generates passes sequentially through
The waste heat boiler steam (vapor) outlet main pipeline (9) and the waste heat boiler steam (vapor) outlet second branch pipeline (92) enter the height
Cylinder pressure blow-off line (11) is coupled with steam discharge therein.
3. feature exists according to claim 1 with 2 described in any item biomass incinerators and coal unit steam coupled system
In being provided with vapour pressure monitor (7) on the waste heat boiler steam (vapor) outlet main pipeline (9).
4. feature exists according to claim 1 with 2 described in any item biomass incinerators and coal unit steam coupled system
In being provided with filling valve (5) on the bypass duct (911).
5. feature exists according to claim 1 with 2 described in any item biomass incinerators and coal unit steam coupled system
In being provided with regulating valve (6) on the waste heat boiler steam (vapor) outlet second branch pipeline (92).
6. feature exists according to claim 1 with 2 described in any item biomass incinerators and coal unit steam coupled system
In temperature-decreased pressure reducer (8) being provided on the waste heat boiler steam (vapor) outlet second branch pipeline (92), relative to the regulating valve
(6), the temperature-decreased pressure reducer (8) is located at waste heat boiler steam (vapor) outlet second branch pipeline (92) downstream.
7. a kind of method that biomass incinerator is coupled with coal unit steam, which is characterized in that
The steam for generating waste heat boiler (2) is successively through waste heat boiler steam (vapor) outlet main pipeline (9) and waste heat boiler steam (vapor) outlet
First branch pipeline (91) enters the level-one extraction line (10) after extraction check valve (4), then couples with steam extraction therein,
The steam for generating waste heat boiler (2) successively passes through waste heat boiler steam (vapor) outlet main pipeline (9), waste heat boiler steam (vapor) outlet
First branch pipeline (91) and bypass duct (911) enter the level-one extraction line (10) before extraction check valve (4), subsequently into
Coal unit steam turbine high pressure cylinder (3) carries out acting power generation.
8. the method that biomass incinerator is coupled with coal unit steam according to claim 7, which is characterized in that this method
It further comprise that the steam for generating waste heat boiler (2) successively passes through waste heat boiler steam (vapor) outlet main pipeline (9) and waste heat boiler
Steam (vapor) outlet second branch pipeline (92) enters the high pressure cylinder blow-off line (11) being connected with coal unit steam turbine high pressure cylinder (3),
Then it is coupled with steam discharge therein.
9. according to the method that any one of claim 7 and 8 biomass incinerator is coupled with coal unit steam, feature exists
In, when the steam pressure in waste heat boiler steam (vapor) outlet main pipeline (9) is less than first pressure predetermined value, closing bypass duct
(911) regulating valve (6) on filling valve (5) and waste heat boiler steam (vapor) outlet second branch pipeline (92) on, keeps steam complete
It is coupled into the level-one extraction line (10) after extraction check valve (4) with steam extraction therein.
10. according to the method that any one of claim 7 and 8 biomass incinerator is coupled with coal unit steam, feature
It is, when the steam pressure in waste heat boiler steam (vapor) outlet main pipeline (9) is pre- less than second pressure greater than first pressure predetermined value
When definite value, the filling valve (5) on bypass duct (911) is opened, and close waste heat boiler steam (vapor) outlet second branch pipeline (92)
On regulating valve (6), a part of steam for generating waste heat boiler (2) enters the level-one extraction steam pipe after extraction check valve (4)
Road (10), another part enters the level-one extraction line (10) before extraction check valve (4), subsequently into coal unit steam turbine high pressure
Cylinder (3) acting power generation.
11. according to the method that any one of claim 7 and 8 biomass incinerator is coupled with coal unit steam, feature
It is, when the steam pressure in waste heat boiler steam (vapor) outlet main pipeline (9) is greater than second pressure predetermined value, opens simultaneously bypass
The regulating valve (6) on filling valve (5) and waste heat boiler steam (vapor) outlet second branch pipeline (92) on pipeline (911), makes waste heat
The a part for the steam that boiler (2) generates enters the level-one extraction line (10) after extraction check valve (4), and another part enters pumping
Level-one extraction line (10) before vapour non-return valve (4) eventually enters into coal unit steam turbine high pressure cylinder (3) acting power generation, and there are also one
The high pressure cylinder blow-off line (11) for entering and being connected with coal unit steam turbine high pressure cylinder (3) is divided to couple with steam discharge therein.
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