CN108644801A - A kind of thermal power generation system - Google Patents
A kind of thermal power generation system Download PDFInfo
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- CN108644801A CN108644801A CN201810204664.8A CN201810204664A CN108644801A CN 108644801 A CN108644801 A CN 108644801A CN 201810204664 A CN201810204664 A CN 201810204664A CN 108644801 A CN108644801 A CN 108644801A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
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Abstract
The present invention relates to field of thermal power, disclose a kind of thermal power generation system, including boiler, main burner and coal supply unit, drying section, coal pulverizer, coal dust classifier, pulverized coal bin and the pulverizer coal feeder being sequentially communicated, pulverizer coal feeder are connected to main burner；Further include Dehumidifying element and flue gas mixed cell, flue gas mixed cell is connected to the smoke outlet of boiler, which is used to provide drier to drying section；Heat exchange pipeline is provided in Dehumidifying element, a part for the lack of gas being discharged from Dehumidifying element enters in flue gas mixed cell to be incorporated as drier and enters in drying section with from the stove cigarette extracted in smoke outlet is mixed, in the coal dust feeding main burner that another part of the lack of gas being discharged from Dehumidifying element supplies pulverizer coal feeder as First air.In the present invention, although using warehouse style powder processed, the partial fume in system can turn again to boiler as pumped (conveying) medium, therefore will not accumulate and impact to heated surface at the end of boiler.
Description
Technical field
The present invention relates to field of thermal power, more particularly to a kind of thermal power generation system.
Background technology
Lignite has the advantages that cleaning, low volatilization and low-sulfur, has these excellent just because of lignite as a kind of fuel
Point, therefore have many national main energy sources lignite as power generation, such as Victoria,Australia.At me
State accounts for the 5.74% of coal resources in China total amount, lignite verifies reserves due to 3194.38 hundred million tons of lignite resource amount
It 1291.32 hundred million tons, accounts for the whole nation and verifies the 12.69% of reserves, therefore, some power plants are also gradually using lignite as hair
Electric energy.
However, that there is humidity is big again while having the advantages that above-mentioned, burning point is low and CO2 emissions for lignite
Big disadvantage.In this way, if lignite directly burns, the thermal efficiency is relatively low, but also can make boiler, fuel pulverizing plant, Ge Geguan
The size in road is all larger, involves great expense, and other auxiliary system capacity are also larger, and station service power consumption rate is higher.At present for the combustion of lignite
It burns and fan mill and the technologies such as circulating fluidized bed boiler and brown coal drying is mainly matched using coal-powder boiler, wherein pulverized-coal fired boiler configures fan
Mill coal pulverizer system is at home and abroad most widely used, but since lignite moisture content is high, is directly entered boiler combustion, boiler effect
Rate is relatively low.Therefore, in order to improve boiler efficiency, in the prior art some power plant to boiler configure blower mill pulverized coal preparation system into
Gone improvement, be combined using fan mill and warehouse style powder processed, it is dry after lack of gas by entering boiler tail after waste heat recovery
Flue gas system, the system realize lack of gas UTILIZATION OF VESIDUAL HEAT IN and water recycling.
However, its partial fume does not return again to boiler body but by passing through after waste heat recovery due to improved system
Boiler tail flue gas system is discharged, this has a certain impact to heated surface at the end of boiler product tool, is unfavorable for burning.
Invention content
It is of the existing technology right since partial fume does not return again to boiler body the purpose of the invention is to overcome
Heated surface at the end of boiler product has influence, while being unfavorable for combustion problem, provides a kind of thermal power generation system, the thermal power generation system
System can not influence heated surface at the end of boiler product in the case where improving boiler efficiency.
To achieve the goals above, one aspect of the present invention provides a kind of thermal power generation system, the thermal power generation system packet
Include boiler, the main burner on the boiler and the coal supply unit being sequentially communicated, drying section, coal pulverizer, coal dust point
From device, pulverized coal bin and pulverizer coal feeder, the coal dust classifier is for detaching coal dust and lack of gas, the pulverizer coal feeder and the main burner
Connection；
The thermal power generation system further includes Dehumidifying element and flue gas mixed cell, the flue gas mixed cell and the pot
The smoke outlet of stove is connected to, which is used to provide drier to the drying section；It is provided in the Dehumidifying element
Heat exchange pipeline, the lack of gas that the coal dust classifier is isolated enter in the Dehumidifying element to be removed by heat exchange pipeline heat exchange
Wet, a part for the lack of gas being discharged from the Dehumidifying element enters in the flue gas mixed cell to be extracted with from the smoke outlet
The mixed drier that is incorporated as of stove cigarette into the drying section, another part conduct for the lack of gas being discharged from the Dehumidifying element
The coal dust that First air supplies the pulverizer coal feeder is sent into the main burner.
Preferably, the bottom of the Dehumidifying element is connected with moisture recovery unit.
Preferably, coal collector, the coal powder collection are provided between the coal dust classifier and the Dehumidifying element
Device is equipped on the boiler for being dusted to the lack of gas isolated from the coal dust classifier positioned at the main combustion
Secondary burner above burner, the thermal power generation system further include air preheater, the entrance of the air preheater with
External environment is connected to, and the outlet of the air preheater is connected with hot air duct, and the one of the hot wind being discharged from the hot air duct
Part is sent into as the coal dust that Secondary Air is used to collect the coal collector in the secondary burner, from the hot blast pipe
A part for the hot wind of road discharge is used to provide combustion air to the main burner.
Preferably, the outlet of the Dehumidifying element is connected with lack of gas pipeline, and the hot wind being discharged from the hot air duct remains
Remaining part point by lateral enters lack of gas pipeline with the lack of gas as First air being discharged from the Dehumidifying element and mixes laggard
Enter in the main burner, one way stop peturn valve is provided on the lateral.
Preferably, the coal dust classifier includes that tailing separator and the fine powder being connected to the tailing separator detach
Device, the outlet of the tailing separator and the coal pulverizer, the pulverized-coal collector pass through conveyance conduit and the coal dust
Collector is connected to, and the tailing separator is used to provide satisfactory coal dust to the pulverized-coal collector and for that will not meet
It is required that coal dust be back to the coal pulverizer, the pulverized-coal collector is used to provide satisfactory coal dust simultaneously to the pulverized coal bin
The lack of gas isolated are provided in the coal collector by the conveyance conduit.
Preferably, the drying section is drying tube, the coal supply unit and the flue gas mixed cell with the drying
The top of pipe is connected to, and the bottom of the drying tube is connected to the coal pulverizer.
Preferably, the Dehumidifying element is more sets, and often covers and be both provided with the heat exchange pipeline in the Dehumidifying element,
The Dehumidifying element is covered to be arranged in parallel more.
Preferably, the thermal power generation system further includes being arranged between the drying section and the flue gas mixed cell
Oxygen content monitoring unit, the oxygen that the oxygen content monitoring unit is used to detect in the drier into the drying section contain
Amount.
Preferably, the coal pulverizer is blower mill.
Preferably, the coal supply unit includes the run coal bin, weighing device and feeder being sequentially communicated, the feeder
Outlet be connected to the drying section.
In the present invention, using warehouse style powder processed, facilitate the pulverized coal flow for adjusting main burner, and the present invention uses lack of gas
Powder feeding, specifically, lack of gas return to boiler, another part lack of gas and high temperature furnace through air heat humidity rear portion as pumped (conveying) medium
Cigarette mixing is used as dried medium, that is to say, that and in the present invention, lack of gas recycle in system, not only have the function of pulverized coal conveying, but also
Play the role of low-temperature furnace smoke, avoid lack of gas direct emission and pollute environment, while not needing low-temperature furnace smoke bleeding point, subtracts
Stove pipe road length is lacked, therefore, in the present invention, although using warehouse style powder processed, the partial fume in system can be made
Boiler is turned again to for pumped (conveying) medium, to will not be as in the prior art, since partial fume does not return again to boiler body
And heated surface at the end of boiler product is impacted.
Description of the drawings
Fig. 1 is the structural schematic diagram for the thermal power generation system that the specific implementation mode of the present invention provides.
Reference sign
1- run coal bins；2- weighing devices；
3- feeders；4- drying sections；
5- blower mills；6- tailing separators；
7- powder pipelines；8- pulverized-coal collectors；
9- pulverized coal bins；10- pulverizer coal feeders；
11- coal collectors；12- wind powder mixing chambers；
13- one way stop peturn valves；14- pulverized coal channels；
15- hot air ducts；15a- laterals；
16- pressure fan；17- main burners；
18- secondary burners；19- stove mouths；
20- boilers；21- air preheaters；
22- dedusters；23- back-end ductworks；
24- air-introduced machines；25- fume treatment units；
26- chimneys；27- high-temperature furnace smoke pipelines；
28- flue gas mixed cells；29- excessive fans；
30- Dehumidifying elements；31- heat exchange pipelines；
32- moisture recovery units；33- lack of gas pipelines；
34- recycles excessive fan.
Specific implementation mode
The specific implementation mode of the present invention is described in detail below in conjunction with attached drawing.It should be understood that this place is retouched
The specific implementation mode stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can
To be combined with each other.
In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, left and right, top, bottom " is logical
Be often for direction shown in the drawings either for it is vertical, vertically or on gravity direction for the mutual position of each component
Set relationship description word.In addition, " inside and outside " refers to the inside and outside of the profile relative to each component itself.
The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiment.
As shown in Figure 1, the thermal power generation system that the specific implementation mode of the present invention provides includes boiler 20, is mounted on boiler
Main burner 17 on 20 and the coal supply unit being sequentially communicated, drying section 4, coal pulverizer 5, coal dust classifier, pulverized coal bin 9 and to
Powder machine 10.That is, the outlet of drying section 4 and coal supply unit, the outlet of coal pulverizer 5 and drying section 4, coal dust point
Outlet from device and coal pulverizer 5, the outlet of pulverized coal bin 9 and coal dust classifier, and pulverizer coal feeder 10 and pulverized coal bin 9
Outlet, for detaching coal dust and lack of gas, pulverizer coal feeder 10 is connected to coal dust classifier with main burner 17.Wherein, the coal-grinding
Machine 5 can be blower mill.
Thermal power generation system further includes Dehumidifying element 30 and flue gas mixed cell 28, flue gas mixed cell 28 and boiler 20
Smoke outlet 19 (smoke outlet 19 here is preferably provided at the position for capableing of extracting high-temperature stove cigarette) is connected to, the flue gas mixed cell 28
For providing drier to drying section 4.Heat exchange pipeline 31, the outlet connection of the Dehumidifying element 30 are provided in Dehumidifying element 30
There is a lack of gas pipeline 33, the lack of gas that coal dust classifier is isolated enter in Dehumidifying element 30 through 31 air heat humidity of heat exchange pipeline, from
A part for the lack of gas that Dehumidifying element 30 is discharged enters in flue gas mixed cell 28 to be mixed with the stove cigarette extracted from smoke outlet 19
And enter in drying section 4 as drier, the another part for the lack of gas being discharged from Dehumidifying element 30 enters lack of gas as First air
In pipeline 33 and the coal dust feeding main burner 17 for being used to supply pulverizer coal feeder 10.Wherein, as shown in Figure 1, lack of gas can pass through
Cycle excessive fan 34 is recycled, and is entered in flue gas mixed cell 28.
In use, raw coal enters drying in drying section 4 through coal supply unit, in drying section 4, raw coal is mixed with drier,
It after preliminarily dried, crushes and is further dried into coal pulverizer 5, the coal dust after the crushing of coal pulverizer 5 (is actually wind at this time
Powder mixture, coal pulverizer 5 export coal dust moisture 10% hereinafter, wind powder mixture temperature is between 150 DEG C~200 DEG C) enter
It is detached in coal dust classifier, by coal dust and lack of gas (being used for powder feeding) separation in coal dust classifier, the coal dust isolated is used
It burns in entering in boiler 20, the lack of gas isolated enter Dehumidifying element 30 and (can will be divided by excessive fan 29 shown in FIG. 1
The lack of gas separated out are sent into Dehumidifying element 30) in, in Dehumidifying element 30, a large amount of vapor warps and heat exchanger tube contained in lack of gas
Become liquid condensed water after coolant liquid heat exchange in road 31, lack of gas are by exchange heat and dehumidify rear portion and high-temperature flue gas (temperature
Degree is about within the scope of 1000~1200 DEG C) be mixed and used as in flue gas mixed cell 28 drier (two kinds of different temperatures
It is about 700~800 DEG C that flue gas forms temperature after blending according to a certain percentage), lack of gas another part after heat exchange and dehumidifying
The coal dust for supplying pulverizer coal feeder 10 as pumped (conveying) medium is sent into main burner 17, that is to say, that from the Dehumidifying element 30
The dry gas of discharge are divided into two-way, are mixed with high-temperature flue gas be used as drier all the way, used all the way as First air.
The thermal power generation system provided in the present invention is adapted to the brown burning of coal of different in moisture, different calorific values.
In the present invention, on the one hand, use warehouse style powder processed, facilitate the pulverized coal flow for adjusting main burner 17, and the present invention is using weary
Pneumatic transmission powder, specifically, lack of gas return to boiler, another part lack of gas and high temperature through air heat humidity rear portion as pumped (conveying) medium
The mixing of stove cigarette is used as dried medium, that is to say, that and in the present invention, lack of gas recycle in system, both have the function of pulverized coal conveying,
Play the role of low-temperature furnace smoke again, avoid lack of gas direct emission and pollute environment, while not needing low-temperature furnace smoke bleeding point,
Reduce stove pipe road length, therefore, in the present invention, although using warehouse style powder processed, the partial fume meeting in system
Boiler is turned again to as pumped (conveying) medium, to will not be as in the prior art, since partial fume does not return again to boiler sheet
Body and to heated surface at the end of boiler product impact, be unfavorable for burning.
On the other hand it is used as drier pair by mixing the high-temperature flue gas extracted out from smoke outlet 19 and dry lack of gas
Lignite to be combusted is dried, and oxygen content is low, and pulverized coal preparation system safety reduces smoking mouth and stove cigarette without extracting low-temperature furnace smoke
Duct length, and the pollution arranged outside lack of gas to environment is further reduced, simultaneously because the moisture in lignite does not enter burner hearth
(make the higher lignite of water content before combustion by being significantly dehydrated using thermal power generation system provided by the invention,
Test proves that lignite dehydration rate is about enabled to reach 90% or more), furnace combustion temperature can be made to increase, helped
In improving fuel economy, improve boiler efficiency (specifically, by taking the lignite of Hulunbeier area moisture 33.4% as an example, pot
The efficiency of furnace can be increased to 93.5% or more from 91.5%), reduce the heating surface area of boiler, reduces boiler and auxiliary system initial cost
And operation power consumption.Simultaneously because exhaust gas volumn substantially reduces, boiler and auxiliary system capacity and power of motor reduce, and can save just
Investment and operating cost.In addition, heat exchange is also carried out with high temperature lack of gas by the coolant liquid in heat exchange pipeline 31 in the present invention, from
And can be with recovery waste heat, the waste heat of recycling can be used for heating cooling water heat supply, to improve integrated heat efficiency, have significant
Economic benefit.
Further, the bottom of the Dehumidifying element 30 is connected with moisture recovery unit 32, big contained in lack of gas as a result,
Vapor is measured to dehumidify singly as after liquid condensed water, condensed water can pass through through with after the coolant liquid heat exchange in heat exchange pipeline 31
First 30 bottoms, which enter in moisture recovery unit 32, recycles, test proves that, it in the present invention can by moisture recovery unit 32
Realize in lignite 90% moisture recycling, by taking the lignite-fired unit of Hulunbeier area 2*600MW as an example, the total moisture of lignite is
33.4%, recyclable 1,000,000 tons annual or more water resource, this has important meaning in Xinjiang of China, the Inner Mongol water-deficient areas Deng Fumei
Justice.In addition, the moisture recovery unit 32 can be connected with water treatment of power plant system, after lack of gas heat exchange, temperature is down to water dew point
Hereinafter, the water after condensation enters water treatment system recycling.
To meet boiler smoke emission request, as shown in Figure 1, the thermal power generation system further includes fume treatment unit
25, the tail flue gas being discharged from boiler 20 can first pass through back-end ductwork 23 and enter dedusting in deduster 22, then pass through air inducing
Machine 24, which enters in fume treatment unit 25, purifies (such as carrying out desulfurization process), and purified flue gas can pass through 26 row of chimney
Go out.
Further, coal collector 11 is provided between coal dust classifier and Dehumidifying element 30, coal collector 11 is used
In the lack of gas isolated from coal dust classifier are dusted with (namely by the coal dust being blended in lack of gas remove), coal powder collection
Device 11 exports lack of gas and is sent into Dehumidifying element 30 through excessive fan 29.Further, it is also equipped with positioned at main burning on boiler 20
The secondary burner 18 of the top of device 17, thermal power generation system further include air preheater 21, the entrance of air preheater 21 with it is outer
Boundary's environmental communication (as shown in Figure 1, pressure fan 16 can be arranged in the inlet of air preheater 21), air preheater 21 goes out
Mouth is connected with hot air duct 15, and a part for the hot wind being discharged from hot air duct 15 is used for as Secondary Air by coal collector 11
The coal dust of collection is sent into secondary burner 18, and a part for the hot wind being discharged from hot air duct 15 is used to carry to main burner 17
For combustion air.In addition, from hot air duct 15 be discharged hot wind remainder by lateral 15a enter lack of gas pipeline 33 with
Enter in main burner 17 after the lack of gas mixing as First air being discharged from Dehumidifying element 30, in this way, (making in powder delivery medium
For the lack of gas of First air) in appropriate hot wind (first passing through air preheater between powder feeding to be heated) be added improve wind powder
Temperature improves the flammability of fuel, enhances boiler low load stable combustion performance, while ensureing the oxygen for having enough when boiler combustion
Gas is further provided with one way stop peturn valve 13 on lateral 15a, for preventing lack of gas from entering hot air duct 15.
In use, the cold air in external environment is sent into air preheater 21 by pressure fan 16 and is heated, the heat after heating
Air is conveyed by hot air duct 15 and is divided into three tunnels, and after being mixed all the way with lack of gas as First air, coal dust is sent to main burning
Device 17 (can wind powder mixing chamber 12 be set in the upstream of main burner 17, wind powder mixing chamber 12 can by pulverized coal channel 14 with
Main burner 17 connect), be also directed to main burner 17 as combustion air all the way, in addition all the way with the fine powder in coal collector 11
Enter secondary burner 18 after mixing and form fractional combustion, that is to say, that makees the fine powder in coal collector 11 in the present invention
It is sent into hearth combustion for secondary fuel, not only improves fuel availability, but also reduce the generation of burner hearth nitrogen oxides.
In addition, the coal dust classifier includes tailing separator 6 and the pulverized-coal collector being connected to tailing separator 68,
The outlet of tailing separator 6 and coal pulverizer 5, pulverized-coal collector 8 are connected to by conveyance conduit with coal collector 11, coarse powder
Separator 6 is used to provide satisfactory coal dust to pulverized-coal collector 8 and for undesirable coal dust to be back to coal-grinding
Machine 5, pulverized-coal collector 8 is for providing satisfactory coal dust to pulverized coal bin 9 and being put forward the lack of gas isolated by conveyance conduit
It is supplied in coal collector 11.In this way, the coal dust (practical is wind powder mixture) when using after the crushing of coal pulverizer 5 is introduced into slightly
Powder separator 6, tailing separator 6 send coarse pulverized coal particle (i.e. undesirable coal dust) back to coal pulverizer 5 and continue to grind,
Satisfactory coal dust, which is entered by powder pipeline processed 7 as shown in Figure 1 in pulverized-coal collector 8, to be detached, and is detached through pulverized-coal collector 8
The coal dust gone out falls into pulverized coal bin 9, is then fallen into wind powder mixing chamber 12 by pulverizer coal feeder 10 and is mixed with First air, then by First air
It is sent into main burner 17 through pulverized coal channel 14.In addition, the lack of gas containing a small amount of fine powder isolated through pulverized-coal collector 8 pass through coal
Powder collector 11 recycles fine powder, and fine powder enters the secondary burner 18 of upper furnace as secondary fuel after being mixed with Secondary Air,
To form fuel-staged combustion.
Wherein, the coal supply unit includes the run coal bin 1, weighing device 2 and feeder 3 being sequentially communicated, feeder 3
Outlet is connected to drying section 4, specific in use, raw coal is fallen into after run coal bin 1 to weighing device 2 measures by feeder 3
It is dried in drying section 4.Wherein for the ease of weighing, manpower is saved, the weighing device can be that automatic scales claim.Further
Ground, the drying section 4 can be drying tube (drying tube can be arranged in a vertical direction), and the coal supply unit and flue gas mixing are single
Member 28 is connected to the top of drying tube (specifically, flue gas mixed cell 28 can be by high-temperature furnace smoke pipeline as shown in Figure 1
27 are connected to drying tube), the bottom of the drying tube is connected to coal pulverizer 5.Certainly, drying section 4 can also according to actual conditions
It is other structures.
In addition, when being overhauled in order to avoid Dehumidifying element 30, system operation is not influenced, preferably the Dehumidifying element 30 is more
Set, and often cover in Dehumidifying element 30 and be both provided with heat exchange pipeline 31, the Dehumidifying elements 30 that cover are arranged in parallel more.In the present invention,
It should be noted that drier flows through the resistance of high-temperature furnace smoke pipeline 27 and drying section 4 and wind powder mixture flows through coarse powder point
From the resistance of device 6 and pulverized-coal collector 8, by blower mill 5, the promotion pressure head of itself overcomes, and lack of gas flow through coal powder collection
The resistance of device 11, Dehumidifying element 30 and corresponding pipeline is overcome by excessive fan 29.
In addition, though drier is by the mixed of the low high-temperature flue gas of oxygen content of smoke gas and the lack of gas after dust separation dehumidifies
It closes object to serve as, but in order to improve security of system energy, preferably needs to prevent extraneous air from leaking into system operation, therefore
Need the oxygen content monitoring unit between drying section 4 and flue gas mixed cell 28 (it is also assumed that oxygen content monitoring unit is
It is arranged on high-temperature furnace smoke pipeline 27), the oxygen content monitoring unit is used to detect the oxygen in the drier into drying section 4
Gas content, wherein for safety, oxygen content need to be strict controlled in 12% or less.
The thermal power generation system provided in the present invention can not only realize lignite efficiency power generation, but also can recycle the moisture in lignite,
Whole system cost of investment will not be caused excessively to increase simultaneously, there is preferable overall technology economic indicator.Although using
Warehouse style powder processed, but heated surface at the end of boiler can't be accumulated and be impacted.Moreover, by lignite high-temperature flue gas in the present invention
Dry, processed powder, dehydration, burning are combined, and after the moisture in recycling lack of gas, boiler smoke tolerance reduces, and lack of gas recirculate, and subtract
Lack and arranged outside lack of gas, therefore has had the function of water-saving, energy saving, economical and environmentally friendly.
The preferred embodiment of the present invention is described in detail above in association with attached drawing, still, the present invention is not limited thereto.At this
In the range of the technology design of invention, a variety of simple variants, including each particular technique can be carried out to technical scheme of the present invention
Feature is combined in any suitable manner.In order to avoid unnecessary repetition, the present invention is to various combinations of possible ways
No longer separately illustrate.But it should also be regarded as the disclosure of the present invention for these simple variants and combination, belongs to the present invention
Protection domain.
Claims (10)
1. a kind of thermal power generation system, which is characterized in that the thermal power generation system includes boiler (20), is mounted on the boiler
(20) main burner (17) on and coal supply unit, drying section (4), coal pulverizer (5), coal dust classifier, the coal being sequentially communicated
Powder cabin (9) and pulverizer coal feeder (10), the coal dust classifier is for detaching coal dust and lack of gas, the pulverizer coal feeder (10) and the main combustion
Burner (17) is connected to；
The thermal power generation system further includes Dehumidifying element (30) and flue gas mixed cell (28), the flue gas mixed cell (28)
It is connected to the smoke outlet (19) of the boiler (20), which is used to provide drying to the drying section (4)
Agent；It is provided with heat exchange pipeline (31) in the Dehumidifying element (30), is removed described in the lack of gas entrance that the coal dust classifier is isolated
By the heat exchange pipeline (31) air heat humidity in wet unit (30), a part for the lack of gas being discharged from the Dehumidifying element (30)
Enter into the flue gas mixed cell (28) with the mixed drier that is incorporated as of stove cigarette extracted from the smoke outlet (19)
In the drying section (4), another part of the lack of gas being discharged from the Dehumidifying element (30) is as First air by the pulverizer coal feeder
(10) coal dust supplied is sent into the main burner (17).
2. thermal power generation system according to claim 1, which is characterized in that the bottom of the Dehumidifying element (30) is connected with
Moisture recovery unit (32).
3. thermal power generation system according to claim 1, which is characterized in that the coal dust classifier and the Dehumidifying element
(30) it is provided with coal collector (11) between, the coal collector (11) is used for being isolated from the coal dust classifier
The lack of gas are dusted, the secondary burner being equipped on the boiler (20) above the main burner (17)
(18), the thermal power generation system further includes air preheater (21), the entrance and external environment of the air preheater (21)
Connection, the outlet of the air preheater (21) are connected with hot air duct (15), the hot wind being discharged from the hot air duct (15)
The part coal dust feeding secondary burner (18) that is used to collect the coal collector (9) as Secondary Air in,
A part for the hot wind being discharged from the hot air duct (15) is used to provide combustion air to the main burner (17).
4. thermal power generation system according to claim 3, which is characterized in that the outlet of the Dehumidifying element (30) is connected with
The remainder of lack of gas pipeline (33), the hot wind being discharged from the hot air duct (15) enters lack of gas by lateral (15a)
Pipeline (33) with mixed from the lack of gas as First air that the Dehumidifying element (30) is discharged after enter the main burner (17)
In, it is provided with one way stop peturn valve (13) on the lateral (15a).
5. thermal power generation system according to claim 4, which is characterized in that the coal dust classifier includes tailing separator
(6) and with the tailing separator (6) pulverized-coal collector (8) being connected to, the tailing separator (6) and the coal pulverizer
(5) outlet, the pulverized-coal collector (8) are connected to by conveyance conduit with the coal collector (11), the coarse powder
Separator (6) is used to provide satisfactory coal dust to the pulverized-coal collector (8) and for returning undesirable coal dust
It is back to the coal pulverizer (5), the pulverized-coal collector (8) is used to provide satisfactory coal dust to the pulverized coal bin (9) and lead to
It crosses the conveyance conduit lack of gas isolated are provided in the coal collector (11).
6. thermal power generation system according to claim 1, which is characterized in that the drying section (4) is drying tube, the confession
Coal unit and the flue gas mixed cell (28) are connected to the top of the drying tube, the bottom of the drying tube and the mill
Coal machine (5) is connected to.
7. according to the thermal power generation system described in any one of claim 1-6, which is characterized in that the Dehumidifying element (30) is
More sets, and often cover and be both provided with the heat exchange pipeline (31) in the Dehumidifying element (30), cover the Dehumidifying element (30) more
It is arranged in parallel.
8. thermal power generation system according to claim 1, which is characterized in that the thermal power generation system further includes that setting exists
Oxygen content monitoring unit between the drying section (4) and the flue gas mixed cell (28), the oxygen content monitoring unit are used
Oxygen content in the drier that detection enters in the drying section (4).
9. thermal power generation system according to claim 1, which is characterized in that the coal pulverizer is blower mill.
10. thermal power generation system according to claim 1, which is characterized in that the coal supply unit includes being sequentially communicated
Run coal bin (1), weighing device (2) and feeder (3), the outlet of the feeder are connected to the drying section (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810204664.8A CN108644801A (en) | 2018-03-13 | 2018-03-13 | A kind of thermal power generation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798516A (en) * | 2019-01-08 | 2019-05-24 | 武汉耀立环保工程有限公司 | The warehouse style pulverized coal carried by hot air method of efficient low-discharging and its system |
| CN110404650A (en) * | 2019-07-04 | 2019-11-05 | 国能绿色能源股份有限公司 | A kind of safe and efficient coal mill system and its method for preparing lignite |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006153364A (en) * | 2004-11-30 | 2006-06-15 | Ishikawajima Harima Heavy Ind Co Ltd | Operation method of circulating fluidized bed combustion device |
| CN202132966U (en) * | 2011-07-20 | 2012-02-01 | 上海机易电站设备有限公司 | Smoke-predrying fan mill direct blowing type powder making system for brown coal |
| CN202132968U (en) * | 2011-07-20 | 2012-02-01 | 上海机易电站设备有限公司 | Smoke drying steel ball brown-coal milling system |
| CN203116491U (en) * | 2013-03-18 | 2013-08-07 | 施大钟 | Lignite water take-out lignite efficient burning system |
| CN206890551U (en) * | 2017-04-24 | 2018-01-16 | 中国神华能源股份有限公司 | A kind of lignite burning utilizes system |
-
2018
- 2018-03-13 CN CN201810204664.8A patent/CN108644801A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006153364A (en) * | 2004-11-30 | 2006-06-15 | Ishikawajima Harima Heavy Ind Co Ltd | Operation method of circulating fluidized bed combustion device |
| CN202132966U (en) * | 2011-07-20 | 2012-02-01 | 上海机易电站设备有限公司 | Smoke-predrying fan mill direct blowing type powder making system for brown coal |
| CN202132968U (en) * | 2011-07-20 | 2012-02-01 | 上海机易电站设备有限公司 | Smoke drying steel ball brown-coal milling system |
| CN203116491U (en) * | 2013-03-18 | 2013-08-07 | 施大钟 | Lignite water take-out lignite efficient burning system |
| CN206890551U (en) * | 2017-04-24 | 2018-01-16 | 中国神华能源股份有限公司 | A kind of lignite burning utilizes system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798516A (en) * | 2019-01-08 | 2019-05-24 | 武汉耀立环保工程有限公司 | The warehouse style pulverized coal carried by hot air method of efficient low-discharging and its system |
| CN110404650A (en) * | 2019-07-04 | 2019-11-05 | 国能绿色能源股份有限公司 | A kind of safe and efficient coal mill system and its method for preparing lignite |
| CN110404650B (en) * | 2019-07-04 | 2021-04-27 | 国能绿色能源股份有限公司 | Coal grinding system and method for safely and efficiently preparing lignite |
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