CN105987379B - Boiler controller system - Google Patents
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- CN105987379B CN105987379B CN201510098493.1A CN201510098493A CN105987379B CN 105987379 B CN105987379 B CN 105987379B CN 201510098493 A CN201510098493 A CN 201510098493A CN 105987379 B CN105987379 B CN 105987379B
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- air duct
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- control valve
- boiler controller
- cold air
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- 239000003245 coal Substances 0.000 claims abstract description 106
- 238000000197 pyrolysis Methods 0.000 claims abstract description 100
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 28
- 239000007787 solid Substances 0.000 claims description 16
- 238000002485 combustion reaction Methods 0.000 claims description 12
- 239000002817 coal dust Substances 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 22
- 239000000843 powder Substances 0.000 abstract description 13
- 239000000446 fuel Substances 0.000 abstract description 12
- 238000010304 firing Methods 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 43
- 239000007789 gas Substances 0.000 description 36
- 238000010438 heat treatment Methods 0.000 description 11
- 230000015572 biosynthetic process Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 238000003786 synthesis reaction Methods 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- 238000006722 reduction reaction Methods 0.000 description 7
- 239000007921 spray Substances 0.000 description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000000779 smoke Substances 0.000 description 6
- 238000005979 thermal decomposition reaction Methods 0.000 description 5
- 235000019504 cigarettes Nutrition 0.000 description 4
- 239000000567 combustion gas Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000000391 smoking effect Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
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- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
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- 230000001276 controlling effect Effects 0.000 description 1
- -1 dust (NOx Chemical class 0.000 description 1
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- 239000003344 environmental pollutant Substances 0.000 description 1
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- 230000036541 health Effects 0.000 description 1
- 208000018875 hypoxemia Diseases 0.000 description 1
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- 239000004615 ingredient Substances 0.000 description 1
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Abstract
The invention discloses a kind of boiler controller systems, including furnace body, main burner, gas burner is fired again, hot air duct and coal pulverizer, boiler controller system further includes pulverized coal pyrolysis stove, cold air duct and small oil gun, the outlet of pulverized coal pyrolysis stove is connected to by firing gas burner again with burner hearth, the outlet of coal pulverizer is connected to by main burner with burner hearth, hot air duct is connected to the entrance of coal pulverizer, small oil gun is arranged on cold air duct and burning makes the cold wind in cold air duct be changed into hot wind in cold air duct, wherein, cold air duct is switchably connected to pulverized coal pyrolysis stove and hot air duct hot wind is delivered to pulverized coal pyrolysis stove or coal pulverizer.The small oil gun of the boiler controller system can make coal pulverizer reach the temperature needed for powder processed in boiler controller system cold start, again pyrolysis institute calorific requirement can be provided for pulverized coal pyrolysis stove in boiler controller system normal operation, suitable reburning fuel is provided to implement reburning technology, to reduce boiler controller system NOx emission.
Description
Technical field
The present invention relates to thermal machine field, more particularly to a kind of boiler controller system.
Background technology
Coal-burning boiler unit will produce a large amount of NOx, SO in the process of running2, the pollutants, wherein nitrogen oxides such as dust
(NOx, including NO, NO2And N2O 67%) is accounted for, is substantially considered as one of the main source of atmosphere pollution, threatens the mankind's
Life and health.It is increasingly stringent with national environmental protection policy, higher environmental requirement is proposed to thermal power plant, from July, 2014
It rises, existing thermal power generation boiler unit discharged nitrous oxides concentration is no more than 100mg/m3。
Mainly there are low NOx combusting technology and SCR (Selective Catalytic in power plant to the control measure of NOx at present
Reduction, selective catalytic reduction) two kinds of technology.SCR technology is current most widely used and most effective technology, but should
Technology is there are initial outlay and operating cost are higher, and there are the security hidden troubles of ammonia leakage.Low NOx combusting technology is main
Including low oxygen combustion, flue gas recirculation, low-NOx combustor technology, air classification, reburning technology etc..Low NOx combusting technology cost
It is relatively low, but general reduction NOx amplitudes are smaller.In general, hypoxemia is run, flue gas recirculation, low-NOx combustor technology, air classification
The NOx reduction rates of equal low NOx combusting technologies are 10~40%.And compared as the reburning technology of reburning fuel using gaseous fuel
Other low NOx combusting technologies have some superiority in terms of NOx removal, can reach 60%~70%.
Reburning technology is also known as fuel staging techniques or furnace reduction technology, it is many stove internal controls for reducing NOx emission
One of most effective measure in method processed.It is that 80%~85% fuel is sent into primary zone, is more than 1 in excess air factor
Under conditions of burn, top a certain suitable position of remaining 15%~20% fuel as reducing agent in primary zone sprays into be formed again
Area is fired, and reburning zone excess air coefficient is less than 1, generated NOx is restored in reburning zone, while further suppressing the generation of NOx.
Natural gas, blast furnace gas and coke-stove gas etc. all can serve as reburning fuel, but for the power plant for not stablizing air source,
The preparation of gas is a comparison stubborn problem, therefore how to implement to adaptation to local conditions a set of small investment, efficient, and is tied
The simple combustion system of structure becomes the key for promoting denitration by refueling technology.
Chinese patent CN101761920A (denominations of invention：A kind of low NOx combustion method fired again using pulverized coal pyrolysis gas and
Device) it is mainly to enter pyrolysis reactor using the part heat smoke of pulverized-coal fired boiler unit back-end ductwork pulverized coal pyrolysis is made to generate again
Combustion gas body again needed for combustion is sent into pulverized-coal fired boiler unit reburning zone and restores NOx, realizes the low NOx drainage of pulverized-coal fired boiler unit.
Wherein, pyrolysis of coal refers to being heated in the absence of air conditions to coal, and a system occurs at different temperatures for coal
The physical change of row and the complex process of chemical change.Pulverized coal pyrolysis stove is after coal dust and required flue gas are passed through in stove,
Under high temperature action, part pulverized coal pyrolysis is generated into CO, H2Deng a kind of device for firing the required body of combustion gas again again.
But this method smokes stove wind turbine primary disadvantage is that needing to increase optional equipment, and flue gas belongs to high-temperature medium,
And it is mingled with a large amount of fly ash granules in flue gas, stove wind turbine of smoking, which is often run under conditions of high temperature and dust, can cause to take out stove
The failure of cigarette wind turbine and maintenance down, while labor intensive, material resources, the discharge value of unit NOx cannot meet discharge standard,
Influence the normal operation of unit.
In addition, boiler controller system cold start is common one of the startup type of station boiler unit, new-built unit and in-service
Cold start is required for after unit maintenance.When boiler controller system black furnace starts, if to start pulverized coal preparation system, the big oil that first puts into operation is needed
Rifle carries out baker, until hot blast temperature reaches the requirement of powder processed, needs to consume a large amount of fuel oil in this way.To solve the problems, such as this and
The black furnace pulverized coal preparation system of invention, which can be implemented without, individually builds starting trouble unit or the independent startup using external heat source
Generating set generates electricity by way of merging two or more grid systems, and realizes that boiler controller system is saved fuel oil, safely and fast started.Wherein black furnace pulverized coal preparation system refers in boiler
When unit cold start, by installing steam air heater or oily auxiliary heating system additional to entering coal pulverizer on First air hot air duct
Temperature needed for cold air heating to coal-grinding mechanism powder, realizes the cold start of boiler controller system.
Chinese patent CN102506407A (denominations of invention：Boiler cold-state start oily auxiliary heating system and generating set without
Heat source starts method) a set of oily auxiliary heating system using small oil gun mainly is installed in the hot air duct of coal pulverizer inlet,
In boiler controller system cold start, the cold air to entering coal pulverizer preheats, and coal pulverizer is made to reach operating condition.Wherein, small oil
Rifle is one kind after fuel-oil atmozation, will make combustion oil be atomized into fine particle, clean-burning ignition installation by air or steam.
The shortcomings that this method is exactly to stop fortune using the oily auxiliary heating system of small oil gun after boiler controller system startup
Row, since the relatively large oil gun of small oil gun nozzle orifice is smaller, when oil gun system shutdown, the contamination precipitation in oil adds hot wind
In contain a large amount of dust, small oil gun spray nozzle clogging can be led to problems such as, wait next time enable when, need first to small oil gun clean
It can come into operation, it is very inconvenient.
Invention content
The purpose of the present invention is to provide a kind of boiler controller system, the small oil gun of the boiler controller system can be in boiler controller system cold conditions
So that coal pulverizer is reached the temperature needed for powder processed when startup, and pyrolysis can be provided in boiler controller system normal operation for pulverized coal pyrolysis stove
Institute's calorific requirement provides suitable reburning fuel, to reduce boiler controller system NOx emission to implement reburning technology.
The present invention provides a kind of boiler controller system, including furnace body, main burner, fires gas burner, hot air duct and mill again
Coal machine, the boiler controller system further include pulverized coal pyrolysis stove, cold air duct and small oil gun, and the outlet of the pulverized coal pyrolysis stove passes through institute
It states and fires gas burner again and be connected to the burner hearth, the outlet of the coal pulverizer passes through the main burner and connects with the burner hearth
Logical, the hot air duct is connected to the entrance of the coal pulverizer, and the small oil gun is arranged on the cold air duct and described
Burning makes the cold wind in the cold air duct be changed into hot wind in cold air duct, wherein the cold air duct switchably with institute
Pulverized coal pyrolysis stove is stated to be connected to the hot air duct the hot wind is delivered to the pulverized coal pyrolysis stove or the coal pulverizer.
Further, the boiler controller system further includes gas-solid separator, and the gas-solid separator includes entrance, gas vent
It is exported with carbon residue, the outlet of the pulverized coal pyrolysis stove is connected to the entrance of the gas-solid separator, and the gas vent passes through institute
It states and fires gas burner again and be connected to the burner hearth.
Further, the boiler controller system further includes carbon residue burner, and the carbon residue outlet passes through the carbon residue burner
It is connected to the burner hearth.
Further, the carbon residue burner is set to the downstream of the main burner, and the gas burner that fires again is set
It is placed in the downstream of the carbon residue burner.
Further, the outlet end of the cold air duct is connect with the hot air duct, and the boiler controller system further includes heat
Solution stove air inlet duct, the first control valve and the second control valve, the arrival end of the pyrolysis oven air inlet duct are connect with the cold air duct,
The outlet end of the pyrolysis oven air inlet duct is connect with the pulverized coal pyrolysis stove, first control valve be set to the pyrolysis oven into
On air duct, second control valve be set on the cold air duct and positioned at the arrival end of the pyrolysis oven air inlet duct with it is described
Between the outlet end of cold air duct.
Further, the boiler controller system further includes third control valve, and the third control valve is set to the cool air hose
Between arrival end and the arrival end of the pyrolysis oven air inlet duct on road and positioned at the cold air duct.
Further, the small oil gun is between the third control valve and the arrival end of the pyrolysis oven air inlet duct.
Further, the boiler controller system further includes by-pass line and the 4th control valve, the arrival end of the by-pass line
It is connect respectively with the cold air duct with outlet end, and the arrival end of the by-pass line is located at the small oil gun and the third
Between control valve, the outlet end of the by-pass line between second control valve and the outlet end of the cold air duct,
4th control valve is set on the by-pass line.
Further, the boiler controller system further includes the 5th control valve, and the 5th control valve is set to the hot blast pipe
The upstream of outlet end on road and positioned at the cold air duct.
Further, first control valve and second control valve are shut-off valve；It is the third control valve, described
4th control valve and the 5th control valve are regulating valve.
Based on boiler controller system provided by the invention, burn on cold air duct and in cold air duct since small oil gun is arranged
So that the cold wind in cold air duct is changed into hot wind, and cold air duct be switchably connected to pulverized coal pyrolysis stove and hot air duct with
Hot wind is delivered to pulverized coal pyrolysis stove or coal pulverizer.It therefore, can will be small in cold air duct in boiler controller system cold start
The hot wind of oil gun heating is sent into coal pulverizer, so that coal pulverizer is reached the temperature needed for powder processed, realizes the cold start of boiler controller system.And
In boiler controller system normal operation, the hot wind by small oil gun heating in cold air duct can be sent into pulverized coal pyrolysis stove, be coal dust
Pyrolysis oven provides pyrolysis coal-fired required heat, is formed and contains CO, H2、CO2Pyrolysis synthetic gas, and wherein CO and H2Have
Very strong reduction is passed through the reburning zone of boiler controller system burner hearth using the pyrolysis synthesis gas as reburning fuel, can be by main combustion
The NOx that area generates is reduced into N2, achieve the purpose that the NOx emission for reducing coal-burning boiler unit.In addition, taking out stove due to being not necessarily to installation
Cigarette wind turbine also overcomes pulverized coal pyrolysis device in the prior art by smoking stove wind turbine for a long time from boiler controller system back-end ductwork pumping
When heat furnace cigarette, stove fan trouble of smoking caused by high temperature and grieshoch environment is shut down the problem of influencing boiler controller system NOx emission.And
The problem of will not deactivating in boiler controller system normal operation due to small oil gun, also alleviate small oil gun spray nozzle clogging.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the principle schematic of the boiler controller system of the preferred embodiment of the present invention.
In Fig. 1, each reference numeral respectively represents：
1, pulverized coal bin；
2, the first power transportation pipe；
3, pulverized coal pyrolysis stove；
4, pyrolysis oven air inlet duct；
5, the first control valve；
6, small oil gun；
7, cold air duct；
8, third control valve；
9, the 5th control valve；
10, hot air duct；
11, thermal decomposition product outlet conduit；
12, gas-solid separator；
13, the second control valve；
14, the 4th control valve；
15, gas pipeline is fired again；
16, carbon residue conveyance conduit；
17, the second power transportation pipe；
18, main burner；
19, coal pulverizer；
20, fire air nozzle；
21, gas burner is fired again；
22, carbon residue burner；
23, burner hearth；
24, furnace body；
25, by-pass line.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Below
Description only actually at least one exemplary embodiment is illustrative, is never used as to the present invention and its application or makes
Any restrictions.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, shall fall within the protection scope of the present invention.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
It is not limited the scope of the invention up to formula and numerical value.Simultaneously, it should be appreciated that for ease of description, attached each portion shown in the drawings
The size divided not is to be drawn according to actual proportionate relationship.For technology, side known to person of ordinary skill in the relevant
Method and equipment may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as authorizing explanation
A part for book.In shown here and discussion all examples, any occurrence should be construed as merely illustrative, and
Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should be noted that：Similar label
Similar terms are indicated in following attached drawing with letter, therefore, once it is defined in a certain Xiang Yi attached drawing, then subsequent attached
It need not be further discussed in figure.
Fig. 1 is the principle schematic of the boiler controller system of the preferred embodiment of the present invention.As shown in Figure 1, the embodiment boiler machine
Group includes pulverized coal bin 1, the first power transportation pipe 2, pulverized coal pyrolysis stove 3, pyrolysis oven air inlet duct 4, the first control valve 5, small oil gun
6, cold air duct 7, third control valve 8, the 5th control valve 9, hot air duct 10, thermal decomposition product outlet conduit 11, gas-solid separator
12, the second control valve 13, the 4th control valve 14, fire gas pipeline 15, carbon residue conveyance conduit 16, the second power transportation pipe again
17, main burner 18, coal pulverizer 19, fire air nozzle 20, fire again gas burner 21, carbon residue burner 22, have burner hearth 23
Furnace body 24 and by-pass line 25.
Wherein, main burner 18, fire again gas burner 21, fire air nozzle 20 and burner hearth 23 be low NOx combustion system
Chief component.Pulverized coal bin 1, the first power transportation pipe 2, pulverized coal pyrolysis stove 3, thermal decomposition product outlet conduit 11 and gas-solid
Separator 12 is the chief component of pulverized coal pyrolysis device.Small oil gun 6, cold air duct 7, hot air duct 10 and coal pulverizer 19 are
The chief component of black furnace pulverized coal preparation system.
Burner hearth 23 is divided into primary zone, reburning zone and burning-out zone from upstream to downstream.Main burner 18, carbon residue burner
22, gas burner 21 is fired again and fire air nozzle 20 is set in turn in from upstream to downstream on furnace body 24.Main burner 18 divides
Three layer arrangements.
The both ends of first power transportation pipe 2 connect with the fuel inlet of the outlet of pulverized coal bin 1 and pulverized coal pyrolysis stove 3 respectively
It connects, the coal dust in pulverized coal bin 1 is delivered in pulverized coal pyrolysis stove 3.
The outlet of pulverized coal pyrolysis stove 3 is connected to by firing gas burner 21 again with burner hearth 23, and the outlet of coal pulverizer 19 passes through
Main burner 18 is connected to burner hearth 23, and hot air duct 10 is connected to the entrance of coal pulverizer 19, and small oil gun 6 is arranged in cold air duct 7
It is upper and in cold air duct 7 burning so that the cold wind in cold air duct 7 is changed into hot wind, wherein cold air duct 7 switchably with coal
Powder pyrolysis oven 3 is connected to hot air duct 10 hot wind is delivered to pulverized coal pyrolysis stove 3 or coal pulverizer 19.Preferably, small oil gun 6 is pacified
Elbow on cold air duct 7.
When boiler controller system black furnace starts, small oil gun 6 is used to heat the cold wind needed for pulverized coal preparation system.Boiler controller system is negative at this time
Lotus is relatively low, and NOx emission concentration is relatively low.After equal boiler controller systems normally start, with the raising of boiler controller system load, fire box temperature
It is increasing, NOx emission concentration can also gradually increase, and First air hot wind is enough to ensure that the normal operation of pulverized coal preparation system, at this time can be with
The hot wind that small oil gun 6 heats is switched to pulverized coal pyrolysis stove 3, the pyrolysis synthesis gas generated by pulverized coal pyrolysis fires reduction boiler again
Unit NOx emission.Therefore, in the boiler controller system of the present embodiment small oil gun 6 can be realized simultaneously reduce boiler controller system NOx emission and
Two kinds of purposes of black furnace powder.
In the present embodiment, gas burner 21 and burner hearth 23 are fired by gas-solid separator 12 and again in the outlet of pulverized coal pyrolysis stove
Connection.Gas-solid separator 12 includes entrance, gas vent and carbon residue outlet, outlet and the gas-solid separator 12 of pulverized coal pyrolysis stove 3
Entrance pass through thermal decomposition product outlet conduit 11 be connected to.Gas vent passes sequentially through fires gas pipeline 15 and again combustion gas volumetric combustion again
Device 21 is connected to burner hearth 23.And carbon residue outlet passes sequentially through carbon residue conveyance conduit 16 and carbon residue burner 22 is connected to burner hearth 23.
As shown in Figure 1, the outlet end of cold air duct 7 is connect with hot air duct 10, the arrival end of pyrolysis oven air inlet duct 4 with it is cold
Wind pipeline 7 connects, and the outlet end of pyrolysis oven air inlet duct 4 is connect with pulverized coal pyrolysis stove 3.First control valve 5 be set to pyrolysis oven into
On air duct 4.Second control valve 13 is set to arrival end and cold air duct 7 on cold air duct 7 and positioned at pyrolysis oven air inlet duct 4
Between outlet end.In the present embodiment, the first control valve 5 and the second control valve 13 are electric check valve.
By the way that cold air duct 7 and pulverized coal pyrolysis may be implemented to the break-make control of the first control valve 5 and the second control valve 13
Stove 3 is switchably connected to hot air duct 10 to select hot wind being delivered to pulverized coal pyrolysis stove 3 or coal pulverizer 19.
Pulverized coal pyrolysis stove 3 is connect with pyrolysis oven air inlet duct 4, what the cold wind in cold air duct 7 was formed after the heating of small oil gun 6
Hot wind can be entered by pyrolysis oven air inlet duct 4 in pulverized coal pyrolysis stove 3 in the case where the first control valve 5 is opened, to be coal
Powder pyrolysis provides heat.
Third control valve 8 is set on cold air duct 7 and positioned at the arrival end of cold air duct 7 and pyrolysis oven air inlet duct 4
Between arrival end.Third control valve 8 is preferably regulating valve, for controlling the cold flow into cold air duct 7.
Small oil gun 6 is between third control valve 8 and the arrival end of pyrolysis oven air inlet duct 4.The setting of the position of small oil gun 6
Energy can be saved only to needing the air for being heated to be hot wind to heat.
The arrival end of by-pass line 25 and outlet end are connect with cold air duct 7 respectively, and the arrival end position of by-pass line 25
Between small oil gun 6 and third control valve 8, the outlet end of by-pass line 25 is located at going out for the second control valve 13 and cold air duct 7
Between mouth end.4th control valve 14 is set on by-pass line 25.4th control valve 14 is preferably regulating valve.By-pass line 25
Mixing with the 4th control valve 14 in boiler controller system normal operation by cold wind and hot wind adjusts 19 powder institute processed of coal pulverizer
The temperature needed.
5th control valve 9 is set to the upstream of the outlet end on hot air duct 10 and positioned at cold air duct 7.5th control valve
9 be preferably regulating valve, and the 5th control valve 9 is for adjusting First air hot wind air quantity and for coordinating the 4th control valve 14 to adjust
Temperature needed for 19 powder processed of coal pulverizer.
How the boiler controller system that above example is illustrated below in conjunction with Fig. 1 is realized and is fired again using pulverized coal pyrolysis synthesis gas
Reduce boiler controller system NOx emission.
When the normal load carrying of boiler controller system, 85%~95% main fuel coal is sent into burner hearth by main burner 18
Primary zone, primary zone excess air coefficient α be 0.8~0.95 under conditions of burning generate nitrogen oxides, by remaining 5%~15%
Fuel be sent into pulverized coal pyrolysis stove 3.
The first control valve 5 on pyrolysis oven air inlet duct 4 is opened, the second control valve 13 on cold wind air duct 7 and simultaneously is closed
The 4th control valve 14 on bypass line 25 is opened, First air cold wind is when flowing through positioned at the small oil gun 6 of elbow by heating shape
At hot wind, the hot wind after being heated is entered by pyrolysis oven air inlet duct 4 in pulverized coal pyrolysis stove 3, will be conveyed from pulverized coal bin 1 through coal dust
The coal dust that pipeline 2 enters in pulverized coal pyrolysis stove 3 is pyrolyzed.It includes that semicoke etc. is solid that pulverized coal pyrolysis mixture is generated after pyrolysis
Body product (calling carbon residue in the following text) and pyrolysis synthesis gas.
Pulverized coal pyrolysis mixture is sent by thermal decomposition product outlet 11 in gas-solid separator 12.Carbon residue and pyrolysis synthesis gas
After the separation of gas-solid separator 12, pyrolysis synthesis gas is delivered to by firing gas pipeline 15 again mounted on main burner 18 and combustion
It burns the reburning zone fired gas burner 21 again and spray into burner hearth 23 to the greatest extent between wind snout 20.It is pyrolyzed the ingredient of synthesis gas
Mainly there are CO, H2、CO2Deng wherein CO and H2With very strong reduction, it is passed through the pyrolysis synthesis gas as combustion gas body again
The NOx that primary zone generates can be reduced into N by the reburning zone of burner hearth 232, and in burning-out zone after-flame, reaching reduces coal-burning boiler machine
The NOx that coal dust firing in burner hearth 23 generates is dropped to the level of environmental requirement discharge by the purpose of the NOx emission of group.
Carbon residue of the pulverized coal pyrolysis mixture after the separation of gas-solid separator 12 enters carbon residue by carbon residue conveyance conduit 16 and fires
Burner 22 sprays into burner hearth 23 and Secondary Air is mixed and burned, after-flame.The carbon residue generated after pulverized coal pyrolysis, which passes through, is located at main burner
18 and the carbon residue burner 22 of reducing zone between gas burner 21 is fired again spray into burner hearth 23 and burn, can further enhance also
Originality atmosphere realizes that depth reduces the function of NOx.
How the boiler controller system of above example is illustrated in no starting trouble and external heat source below in conjunction with Fig. 1
In the case of carry out black furnace startup when, realize black furnace powder.
When black furnace starts, the first control valve 5, the 4th control valve 14 and the 5th control valve 9 are closed, opens the second control valve
13, cold wind is thermally formed hot wind when passing through the small oil gun 6 for being installed in elbow, and the hot wind after being heated reaches coal pulverizer 19
Temperature needed for work, grinds coal dust, the coal dust ground enters through the second power transportation pipe 17 subsequently into coal pulverizer 19
Main burner 18 sprays into burner hearth 23 and burns, and boiler controller system is driven to start.
After boiler controller system normally starts, fire box temperature increases, and stove smoke temperature degree increases, and First air adds by air preheater
When hot blast temperature after heat disclosure satisfy that the requirement of coal pulverizer, the second control valve 13 can be closed, open the 5th control valve 9 and the
Four control valves 14 make mixed wind-warm syndrome reach the requirement of coal pulverizer 19 by the adjusting of First air hot wind and cold wind.It beats simultaneously
The first control valve 5 is opened, the cold wind after the heating of small oil gun 6 reaches and enters pulverized coal pyrolysis by pyrolysis oven air inlet duct 4 after certain temperature
Stove 3 carries out pyrolysis to coal dust and generates pyrolysis gas, and the low NOx system of bonded boiler unit reduces the discharge of boiler controller system NOx, to reach
The purpose of multiple use is realized to a set of small oil gun 6.
From the above description, it can be seen that above example of the present invention has the following advantages that：
1, small oil gun can make coal pulverizer reach the temperature needed for powder processed in boiler controller system cold start, and can be in boiler
Pyrolysis institute calorific requirement is provided for pulverized coal pyrolysis stove when unit normal operation, suitable combustion again is provided to implement reburning technology
Material, to reduce boiler controller system NOx emission.
2, the heat source needed for pulverized coal pyrolysis stove comes from the hot wind after small oil gun heating, relative to smoke for stove impurity compared with
It is few, and the system does not have to installation and smokes stove wind turbine, avoid with smoke stove wind turbine extraction boiler controller system tail portion heat smoke when, hot cigarette
Dust in gas and flue gas causes to smoke stove fan trouble, influences the NOx emission of boiler controller system.
3, the NOx generated in boiler controller system combustion process is down to the level of environmental requirement using pyrolysis synthesis gas, it can be with
Reduce initial outlay and the operating cost of flue gas denitrification system SCR device.
4, on the basis of a set of small oil gun realizes that pyrolysis is coal-fired and black furnace powder is double-duty, since small oil gun can be grown
Phase comes into operation, and small oil gun caused by also can avoid when small oil gun deactivates blocks.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
It can modify to the specific implementation mode of the present invention or equivalent replacement is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (10)
1. a kind of boiler controller system, including furnace body (24), main burner (18), gas burner (21), hot air duct (10) are fired again
With coal pulverizer (19), which is characterized in that the boiler controller system further includes pulverized coal pyrolysis stove (3), cold air duct (7) and small oil gun
(6), the outlet of the pulverized coal pyrolysis stove (3) is fired gas burner (21) described in and is connected to burner hearth (23) again, the coal-grinding
The outlet of machine (19) is connected to by the main burner (18) with the burner hearth (23), the hot air duct (10) and the coal-grinding
The entrance of machine (19) is connected to, and the small oil gun (6) is arranged on the cold air duct (7) and in the cold air duct (7) internal combustion
Burning makes the cold wind in the cold air duct (7) be changed into hot wind, wherein the cold air duct (7) switchably with the coal dust
Pyrolysis oven (3) is connected to the hot air duct (10) the hot wind is delivered to the pulverized coal pyrolysis stove (3) or the coal-grinding
Machine (19).
2. boiler controller system according to claim 1, which is characterized in that the boiler controller system further includes gas-solid separator
(12), the gas-solid separator (12) include entrance, gas vent and carbon residue outlet, the outlet of the pulverized coal pyrolysis stove (3) with
The entrance of the gas-solid separator (12) is connected to, and the gas vent fires gas burner (21) and the burner hearth again by described
(23) it is connected to.
3. boiler controller system according to claim 2, which is characterized in that the boiler controller system further includes carbon residue burner
(22), the carbon residue outlet is connected to by the carbon residue burner (22) with the burner hearth (23).
4. boiler controller system according to claim 3, which is characterized in that the carbon residue burner (22) is set to the main combustion
The downstream of burner (18), the downstream fired gas burner (21) again and be set to the carbon residue burner (22).
5. boiler controller system according to any one of claim 1 to 4, which is characterized in that the outlet of the cold air duct (7)
End is connect with the hot air duct (10), and the boiler controller system further includes pyrolysis oven air inlet duct (4), the first control valve (5) and the
The arrival end of two control valves (13), the pyrolysis oven air inlet duct (4) is connect with the cold air duct (7), the pyrolysis oven air inlet
The outlet end in road (4) is connect with the pulverized coal pyrolysis stove (3), and first control valve (5) is set to the pyrolysis oven air inlet duct
(4) on, second control valve (13) is set to entering on the cold air duct (7) and positioned at pyrolysis oven air inlet duct (4)
Between mouth end and the outlet end of the cold air duct (7).
6. boiler controller system according to claim 5, which is characterized in that the boiler controller system further includes third control valve (8),
The third control valve (8) is set on the cold air duct (7) and is located at the arrival end of the cold air duct (7) and the heat
Between the arrival end for solving stove air inlet duct (4).
7. boiler controller system according to claim 6, which is characterized in that the small oil gun (6) is located at the third control valve
(8) between the arrival end of the pyrolysis oven air inlet duct (4).
8. boiler controller system according to claim 7, which is characterized in that the boiler controller system further include by-pass line (25) and
4th control valve (14), the arrival end of the by-pass line (25) and outlet end are connect with the cold air duct (7) respectively, and institute
The arrival end of by-pass line (25) is stated between the small oil gun (6) and the third control valve (8), the by-pass line
(25) outlet end is between second control valve (13) and the outlet end of the cold air duct (7), the 4th control
Valve (14) is set on the by-pass line (25).
9. boiler controller system according to claim 8, which is characterized in that the boiler controller system further includes the 5th control valve (9),
5th control valve (9) is set to the upstream of the outlet end on the hot air duct (10) and positioned at the cold air duct (7).
10. boiler controller system according to claim 9, which is characterized in that first control valve (5) and second control
Valve (13) is shut-off valve；The third control valve (8), the 4th control valve (14) and the 5th control valve (9) are
Regulating valve.
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| CN108151008B (en) * | 2017-11-18 | 2019-03-12 | 西安交通大学 | A kind of mixed combustion system and method for power boiler low NOx of high-temperature flue gas preheating semicoke |
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| CN110220211B (en) * | 2019-07-03 | 2024-04-02 | 国能南京电力试验研究有限公司 | Device and method for cooperatively controlling load of coal-fired boiler by utilizing coupling of coal and gas |
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| CN110846060A (en) * | 2019-12-14 | 2020-02-28 | 陕西煤业化工技术研究院有限责任公司 | Pulverized coal pyrolysis and coke powder combustion power generation coupling system and method |
| CN113304864B (en) * | 2020-11-03 | 2022-08-26 | 华能国际电力股份有限公司南通电厂 | One-key start-stop control method for coal mill system capable of automatically saving fuel oil |
| CN113154369A (en) * | 2021-05-27 | 2021-07-23 | 西安热工研究院有限公司 | Pulverized coal and ammonia mixed fuel preheating and decomposing combustion system and method |
| CN114811575B (en) * | 2022-04-19 | 2023-04-25 | 东方电气集团东方锅炉股份有限公司 | Coal-fired and natural gas dual-purpose boiler system and application method thereof |
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