CN105674256B - Circulating fluidized bed boiler quick start system and method - Google Patents
Circulating fluidized bed boiler quick start system and method Download PDFInfo
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- CN105674256B CN105674256B CN201510842228.XA CN201510842228A CN105674256B CN 105674256 B CN105674256 B CN 105674256B CN 201510842228 A CN201510842228 A CN 201510842228A CN 105674256 B CN105674256 B CN 105674256B
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Abstract
The invention discloses a kind of circulating fluidized bed boiler quick start system and methods, the remover ash discharge dust mouth of more circulating fluidized bed boiler is connected with grey library, also it is connected with the burner hearth of boiler, the flying dust that deduster is collected can be delivered to grey library, can also be delivered to the burner hearth of boiler.When certain boiler startup, coal feeding amount is few, and burner hearth internal particle concentration is low, boiler there are overtemperature risks cannot quick load up；At this time, the fly ash carry for the boiler dust remover trapping that adjacent furnace is operated normally to the starting boiler furnace, improve the ash concentration inside the starting trouble burner hearth, the boiler for starting this quickly establishes grey balance, avoids burner hearth from causing overtemperature coking problem since ash concentration is low, boiler can be with fast lifting load, effectively shorten starting time of boiler, the steam production of boiler is improved, while reducing the overtemperature coking risk during boiler startup, improves the safety of boiler operatiopn.
Description
Technical field
The present invention relates to circulating fluidized bed boiler running technology field, particularly belongs to a kind of circulating fluidized bed boiler and quickly open
Dynamic system and method.
Background technique
Circulating fluidized bed boiler has obtained a wide range of popularization in China during the last ten years recently as a kind of cleaning combustion devices
Using.According to incompletely statistics, the circulating fluidized bed boiler of the various capacity to put into operation in China is more than 3000, and wherein the whole world holds
Measure the successfully investment life in 2013 of maximum circulating fluidized bed boiler-supercritical circulating fluidized bed demonstration project of Baima 600MW
It produces.
Circulating fluidized bed boiler belongs to low-temperature burning, and fire box temperature is lower than 1000 DEG C, and heat exchange both includes radiation heat transfer in furnace,
It again include heat convection, wherein furnace endoparticle concentration has a major impact heat exchange in furnace.Furnace endoparticle concentration is high, heat-energy transducer in furnace
Power is strong, and the fire box temperature of boiler is able to maintain that in normal operation range, if furnace endoparticle concentration is too low, exchange capability of heat in furnace
Difference, the heat absorption capacity of heating surface is insufficient, will lead to fire box temperature be difficult to control, furnace temperature overtemperature, or even boiler coke blowing out occurs
Failure.
In order to maintain the normal furnace temperature of boiler, circulating fluidized bed boiler starting needs to take following measure: (1) boiler startup
Before, a certain amount of bed material of addition in burner hearth, to there is enough ash concentrations when boiler startup in burner hearth；(2) in boiler startup
The supplement addition bed material in burner hearth in the process, to maintain the concentration of furnace ash of burner hearth start-up course；(3) it is thrown when boiler temperature meets
When coal condition, coal is thrown as early as possible, using the bed material of coal ash supplement boiler, however, it is necessary to be slowly increased coal-supplying amount, is slowly increased negative
Lotus, avoid due to boiler coal feeding amount is excessive and boiler bed material is insufficient, overtemperature coking problem occurs for burner hearth internal heat ability difference.
By above-mentioned measure, although the purpose of circulating fluidized bed boiler starting, this traditional circulation may be implemented
Fluidized-bed combustion boiler Starting mode Shortcomings.
It is gone in burner hearth in boiler startup and adds certain bed material Shortcomings.There are mainly two types of bed is added in burner hearth at present
The mode of material: artificial addition bed material mode and mechanical addition bed material mode.The steam production of circulating fluidized bed boiler of power station generally exists
400t/h or more, even as high as 2000t/h, boiler startup go to the bed material added in burner hearth to be up to tons up to a hundred.If using people
Work adds bed material, and labor intensity is very big, is totally-enclosed space, operating condition very severe in burner hearth；If added using machinery
Extra bed material is general that the bed material for being made ready beforehand for being stored in starting bed material storehouse is transported in burner hearth using pneumatic conveying mode.By
In bed material average particle size in 3mm to 5mm or so, the bed material of so big granularity is conveyed using pneumatic conveying mode, defeated
Send that difficult, time-consuming.For boiler capacity in the circulating fluidized bed boiler of 400t/h, whether bed material in manual type, still
Bed material in mechanical system, general time-consuming are unfavorable for boiler quick start all at 10 hours or more.
When not having throwing coal condition during boiler startup, the heat boiler of fuel burning release is generally relied on.
Since, almost without ash content, fuel burning not can increase the bed material of boiler, and the pressure fan and air inducing of boiler not only in fuel oil
Machine all has been switched on, and opening starting bed material, especially thin bed material that stokehold is added in furnace can be taken away by flue gas, and thin in burner hearth
Grain is fewer and fewer, and the ash concentration of burner hearth is caused to gradually decrease.For this purpose, boiler needs to add before activation more bed material, addition
Bed material time-consuming is longer.
Bed material Shortcomings are added during boiler startup in boiler.When starting bed material is generally from boiler normal operation
The clinker of discharge will be suitble to the little particle for doing boiler startup bed material to screen, be prestored to starting bed material after screening
In storehouse, the biggish starting bed material storehouse of volume and screening system are needed, it is also necessary to which occupied ground, initial cost is higher, system complex, event
Barrier rate is high.
Addition is coal-fired in burner hearth during boiler startup supplements bed material Shortcomings.Coal is consumed needed for during boiler startup
The coal ash of less generation after coal combustion is measured as supplement bed material, long time integration is needed just to be able to satisfy wanting for the concentration of furnace ash
It asks.Since the ash concentration in this stage furnace is low, in furnace, exchange capability of heat is poor, the caloric receptivity of furnace internal heating surface is limited, once throw coal
Speed is excessive, is very easy to lead to burner hearth overtemperature coking.For this purpose, in boiler startup, it is necessary to be slowly increased to coal speed, slowly
Increase boiler load, boiler takes a long time to can be only achieved at full capacity.
In conclusion the starting of circulating fluidized bed boiler has addition starting bed material, time-consuming, full from boiler startup to band
It is long the time required to load, and there are the concentration of furnace ash relatively low, boiler the problems such as there are overtemperature and coking risks.
Summary of the invention
The object of the present invention is to provide a kind of circulating fluidized bed boiler quick start system and methods, overcome existing skill
The deficiency of art, rationally, the remover ash discharge dust mouths of more circulating fluidized bed boiler is connected with ash library for design, also with the burner hearth of boiler
It is connected, the flying dust that deduster is collected can be delivered to grey library, can also be delivered to the burner hearth of boiler.When certain boiler startup
When, coal feeding amount is few, and burner hearth internal particle concentration is low, boiler there are overtemperature risks cannot quick load up；At this point, adjacent furnace is normal
The fly ash carry of the boiler dust remover trapping of operation improves grey dense inside the starting trouble burner hearth to the boiler furnace of the starting
Degree, the boiler for starting this quickly establish grey balance, avoid burner hearth from causing overtemperature coking problem since ash concentration is low, boiler can
With fast lifting load, starting time of boiler is effectively shortened, improve the steam production of boiler, while during reducing boiler startup
Overtemperature coking risk, improve the safety of boiler operatiopn.
The technical solution adopted by the invention is as follows:
A kind of circulating fluidized bed boiler quick start system, including A furnace and B furnace, it is characterised in that: the A furnace passes through A
Furnace ash inlet tube is connected with A furnace remover ash discharge dust mouth and B furnace remover ash discharge dust mouth respectively, and the B furnace passes through B furnace ash inlet tube point
It is not connected with A furnace remover ash discharge dust mouth and B furnace remover ash discharge dust mouth；The import of A outlet of still Yu the A furnace cyclone separator
It is connected, the outlet of the A furnace cyclone separator is connected with A back-end ductwork import, the outlet of the A furnace back-end ductwork
It is connected with A furnace deduster import, the ash discharging hole of the A furnace deduster passes through A furnace ash inlet tube respectively and is connected with A furnace, leads to
B furnace ash inlet tube is crossed to be connected with B furnace, be connected by ash pipeline with Hui Ku；The B outlet of still and B furnace cyclone separator
Import is connected, and the outlet of B furnace cyclone separator is connected with B furnace back-end ductwork import, the outlet of B furnace back-end ductwork and B furnace
Deduster import is connected, and the ash discharging hole of B furnace deduster passes through B furnace ash inlet tube respectively and is connected with B furnace, by A furnace ash inlet tube
It is connected with A furnace, is connected by ash pipeline with Hui Ku.
Setting A furnace returns grey valve, A furnace deduster in the connecting pipe of the A furnace remover ash discharge dust mouth and A furnace ash inlet tube
A furnace is set in the connecting pipe of ash discharging hole and ash pipeline into grey library valve, the connection of A furnace remover ash discharge dust mouth and B furnace ash inlet tube
A furnace is set on pipeline and returns grey valve into B furnace.
Setting B furnace returns grey valve, B furnace deduster in the connecting pipe of the B furnace remover ash discharge dust mouth and B furnace ash inlet tube
B furnace is set in the connecting pipe of ash discharging hole and ash pipeline into grey library valve, the connection of B furnace remover ash discharge dust mouth and A furnace ash inlet tube
B furnace is set on pipeline and returns grey valve into A furnace.
Arrange that A furnace heating surface, A outlet of still are connected with the import of A furnace cyclone separator in the A furnace, A furnace whirlwind point
Outlet from device is connected with A furnace material returning device import, and the outlet of A furnace material returning device is connected with A furnace import.
Arrange that B furnace heating surface, B outlet of still are connected with the import of B furnace cyclone separator in the B furnace, B furnace whirlwind point
Outlet from device is connected with B furnace material returning device import, and the outlet of B furnace material returning device is connected with B furnace import.
A kind of circulating fluidized bed boiler quick start method, comprising the following steps: fuel and air burn in A furnace, combustion
Burning product flue gas, to carry bed material, coal ash, the particles such as desulfurizing agent mobile to A furnace top, and to A furnace heating surface heat release, later flue gas
It carries particle and leaves A furnace, enter A furnace cyclone separator, the coarse granule that flue gas carries is trapped simultaneously by A furnace cyclone separator
A furnace is returned to through A furnace material returning device, the fine grained that flue gas carries enters A furnace tail portion after leaving A furnace cyclone separator together with flue gas
Flue enters A furnace deduster after completing heat release, and the most fine graineds carried in flue gas are collected by A furnace deduster, are received
The fine grained collected is discharged through A furnace remover ash discharge dust mouth；Fuel and air burn in B furnace, and combustion product flue gas carries bed
The particles such as material, coal ash, desulfurizing agent are mobile to B furnace top, and to B furnace heating surface heat release, flue gas carries particle and leaves B furnace later,
B furnace cyclone separator is entered, the coarse granule that flue gas carries is trapped and returned through B furnace material returning device by B furnace cyclone separator
To B furnace, the fine grained that flue gas carries enters B furnace back-end ductwork after leaving B furnace cyclone separator together with flue gas, after completing heat release
Into B furnace deduster, the most fine graineds carried in flue gas are collected by B furnace deduster, collect the fine grained to get off
It is discharged through B furnace remover ash discharge dust mouth；
When B furnace operates normally, and starts A furnace, start following steps: in the starting of A furnace, the coal feeding amount of A furnace is few, in A furnace
Granule density it is low, it is low in the emission capacity of particle to the A furnace heating surface of the flue gas and its carrying of A furnace (A1), if at this time to A
A large amount of coals are launched in furnace, fire box temperature quicklys increase, and particle overtemperature is be easy to cause to lead to the failures such as coking；A furnace is closed into Hui Ku
Valve opens A furnace and returns grey valve, the fine grained that A furnace deduster is collected is delivered to A furnace by A furnace ash inlet tube；Close B furnace into
Grey library valve and B furnace return ash valve, open B furnace into A furnace and return grey valve, the fine grained that B furnace deduster is collected passes through A furnace into ash
Pipe is delivered to A furnace；It is delivered to A furnace by the fine grained that the fine grained and B furnace deduster of collecting A furnace deduster are collected, effectively
The granule density of A furnace is improved, thermal discharge of the flue gas and particle in raising A furnace to A furnace heating surface；When the granule density foot of A furnace
When enough high, the throwing coal rate to A furnace is increased, quick start A furnace under conditions of A furnace not overtemperature.
When A furnace operates normally, and starts B furnace, start following steps: in the starting of B furnace, the coal feeding amount of B furnace is few, in B furnace
Granule density it is low, it is low in the emission capacity of particle to the B furnace heating surface of the flue gas and its carrying of B furnace, if at this time into B furnace
A large amount of coals are launched, fire box temperature quicklys increase, and particle overtemperature is be easy to cause to lead to the failures such as coking；B furnace is closed into grey library valve,
It opens B furnace and returns grey valve, the fine grained that B furnace deduster is collected is delivered to B furnace by B furnace ash inlet tube；A furnace is closed into grey library valve
Door and A furnace return grey valve, open A furnace into B furnace and return grey valve, the fine grained that A furnace deduster is collected is conveyed by B furnace ash inlet tube
To B furnace；It is delivered to B furnace by the fine grained that the fine grained and A furnace deduster of collecting B furnace deduster are collected, effectively improves B furnace
Granule density, improve B furnace in flue gas and thermal discharge from particle to B furnace heating surface；When the granule density of B furnace is sufficiently high,
The throwing coal rate to B furnace is increased, quick start B furnace under conditions of B furnace not overtemperature.
Compared with the prior art, beneficial effects of the present invention are as follows:
1) in the start-up course of boiler, by fly ash carry that boiler dust remover that adjacent furnace operates normally is collected to starting pot
In furnace, the concentration of furnace ash of starting trouble is quickly improved, solves that the concentration of furnace ash during boiler startup is low, loading rate
Slowly, open furnace time long problem, also reduce during boiler startup as the concentration of furnace ash it is low caused by burner hearth overtemperature coking
Risk.
2) present invention solve circulating fluidized bed boiler during startup coal-supplying amount increase slowly, load increase slowly,
Boiler establishes the slow problem of normal grey cyclic process, and boiler can be made quickly to establish normal grey balance during startup.Cause
This, after applying the present invention, the bed material additive amount before boiler startup can be greatly reduced not only saves workload, also substantially
Degree is shortened the time required to addition starting bed material, can make boiler quickly put into operation in furnace.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
A1-A furnace, A2-A furnace material returning device, A3-A furnace ash inlet tube, A4-A furnace return grey valve, and A5-B furnace is into A ashes valve
Door, A6-A furnace is into grey library valve, A7-A furnace cyclone separator, A8-A furnace back-end ductwork, A9-A furnace deduster, A10-A furnace
Remover ash discharge dust mouth, A11-A furnace heating surface, B1-B furnace, B2-B furnace material returning device, B3-B furnace ash inlet tube, B4-B furnace return grey valve
Door, B5-A furnace is into B ashes valve, and B6-B furnace is into grey library valve, B7-B furnace cyclone separator, B8-B furnace back-end ductwork,
B9-B furnace deduster, B10-B furnace remover ash discharge dust mouth, B11-B furnace heating surface, C1- ash pipeline, C2- ash library
Specific embodiment
Referring to attached drawing, a kind of circulating fluidized bed boiler quick start system, including A furnace (A1) and B furnace (B1), feature exists
In: the A furnace (A1) by A furnace ash inlet tube (A3) respectively with A furnace remover ash discharge dust mouth (A10) and B furnace remover ash discharge dust mouth
(B10) it is connected, the B furnace (B1) is removed with A furnace remover ash discharge dust mouth (A10) and B furnace respectively by B furnace ash inlet tube (B3)
Dirt device ash discharging hole (B10) is connected；A furnace (A1) outlet is connected with the import of A furnace cyclone separator (A7), described
The outlet of A furnace cyclone separator (A7) is connected with A furnace back-end ductwork (A8) import, and the A furnace back-end ductwork (A8) goes out
Mouth is connected with A furnace deduster (A9) import, and the ash discharging hole (A10) of the A furnace deduster (A9) passes through A furnace ash inlet tube respectively
(A3) it is connected with A furnace (A1), is connected by B furnace ash inlet tube (B3) with B furnace (B1), by ash pipeline (C1) and grey library (C2)
It is connected；B furnace (B1) outlet is connected with the import of B furnace cyclone separator (B7), and B furnace cyclone separator (B7) goes out
Mouth is connected with B furnace back-end ductwork (B8) import, and the outlet of B furnace back-end ductwork (B8) is connected with B furnace deduster (B9) import,
The ash discharging hole (B10) of B furnace deduster (B9) is connected, by A furnace ash inlet tube with B furnace (B1) respectively by B furnace ash inlet tube (B3)
(A3) it is connected with A furnace (A1), is connected by ash pipeline (C1) with grey library (C2)；The A furnace remover ash discharge dust mouth (A10)
Grey valve (A4), A furnace remover ash discharge dust mouth (A10) and ash pipeline are returned with A furnace is arranged in the connecting pipe of A furnace ash inlet tube (A3)
(C1) A furnace is set in connecting pipe into grey library valve (A6), A furnace remover ash discharge dust mouth (A10) and B furnace ash inlet tube (B3))
A furnace is set in connecting pipe and returns grey valve (B5) into B furnace；The B furnace remover ash discharge dust mouth (B10) and B furnace ash inlet tube (B3)
Connecting pipe on setting B furnace return grey valve (B4), in the connecting pipe of B furnace remover ash discharge dust mouth (B10) and ash pipeline (C1)
B furnace is set into grey library valve (B6), B furnace remover ash discharge dust mouth (B10) and A furnace ash inlet tube (A3)) connecting pipe on B furnace is set
Grey valve (A5) is returned into A furnace；A furnace heating surface (A11) is arranged in the A furnace (A1), A furnace (A1) outlet and A furnace cyclonic separation
The import of device (A7) is connected, and the outlet of A furnace cyclone separator (A7) is connected with A furnace material returning device (A2) import, A furnace material returning device
(A2) outlet is connected with A furnace (A1) import；B furnace heating surface (B11) is arranged in the B furnace (B1), B furnace (B1) outlet and B
The import of furnace cyclone separator (B7) is connected, and the outlet of B furnace cyclone separator (B7) is connected with B furnace material returning device (B2) import
Logical, B furnace material returning device (B2) outlet is connected with B furnace (B1) import.
A kind of circulating fluidized bed boiler quick start method, comprising the following steps: fuel and air are in A furnace (A1) internal combustion
It burns, it is mobile to the A furnace top (A1) that combustion product flue gas carries bed material, coal ash, the particles such as desulfurizing agent, and to A furnace heating surface (A11)
Heat release, flue gas carries particle and leaves A furnace (A1) later, enters A furnace cyclone separator (A7), the coarse granule that flue gas carries is by A
The fine grained and flue gas that furnace cyclone separator (A7) is trapped and carried through A furnace material returning device (A2) back to A furnace (A1), flue gas
A furnace cyclone separator (A7) is left together and enters A furnace back-end ductwork (A8) afterwards, enters A furnace deduster (A9), cigarette after completing heat release
The most fine graineds carried in gas are collected by A furnace deduster (A9), are collected the fine grained to get off and are arranged through A furnace deduster
Grey mouth (A10) discharge；The burning in B furnace (B1) of fuel and air, combustion product flue gas carry bed material, coal ash, desulfurizing agent etc.
Grain is mobile to the B furnace top (B1), and to B furnace heating surface (B11) heat release, flue gas carries particle and leaves B furnace (B1) later, enters
B furnace cyclone separator (B7), the coarse granule that flue gas carries are trapped by B furnace cyclone separator (B7) and through B furnace material returning device
(B2) B furnace (B1) is returned to, the fine grained that flue gas carries leaves B furnace cyclone separator (B7) together with flue gas and enters B furnace tail afterwards
Portion's flue (B8) enters B furnace deduster (B9) after completing heat release, and the most fine graineds carried in flue gas are by B furnace deduster
(B9) it collects, collects the fine grained to get off and be discharged through B furnace remover ash discharge dust mouth (B10)；When B furnace (B1) normal operation, open
When dynamic A furnace (A1), start following steps: in the starting of A furnace, the coal feeding amount of A furnace is few, and the granule density in A furnace (A1) is low, in A
The emission capacity of particle to the A furnace heating surface (A11) of the flue gas and its carrying of furnace (A1) is low, if thrown at this time into A furnace (A1)
Amplification quantity coal, fire box temperature quickly increase, and particle overtemperature is be easy to cause to lead to the failures such as coking；A furnace is closed into grey library valve
(A6), it opens A furnace and returns grey valve (A4), the fine grained that A furnace deduster (A9) is collected is delivered to A by A furnace ash inlet tube (A3)
Furnace (A1)；It closes B furnace and returns grey valve (B4) into grey library valve (B6) and B furnace, open B furnace into A furnace and return grey valve (A5), by B furnace
The fine grained that deduster (B9) is collected is delivered to A furnace (A1) by A furnace ash inlet tube (A3)；By the way that A furnace deduster (A9) is collected
Fine grained and B furnace deduster (B9) collect fine grained be delivered to A furnace (A1), effectively improve the granule density of A furnace (A1), mention
The thermal discharge of flue gas and particle in high A furnace (A1) to A furnace heating surface (A11)；When the granule density of A furnace (A1) is sufficiently high,
The throwing coal rate to A furnace (A1) is increased, quick start A furnace under conditions of A furnace (A1) not overtemperature.When A furnace (A1) operate normally,
When starting B furnace (B1), start following steps: in the starting of B furnace, the coal feeding amount of B furnace is few, and the granule density in B furnace (B1) is low,
The emission capacity of particle to the B furnace heating surface (B11) of the flue gas and its carrying of B furnace (B1) is low, if thrown at this time into B furnace (B1)
Amplification quantity coal, fire box temperature quickly increase, and particle overtemperature is be easy to cause to lead to the failures such as coking；B furnace is closed into grey library valve
(B6), it opens B furnace and returns grey valve (B4), the fine grained that B furnace deduster (B9) is collected is delivered to B by B furnace ash inlet tube (B3)
Furnace (B1)；It closes A furnace and returns grey valve (A4) into grey library valve (A6) and A furnace, open A furnace into B furnace and return grey valve (B5), by A furnace
The fine grained that deduster (A9) is collected is delivered to B furnace (B1) by B furnace ash inlet tube (B3)；By the way that B furnace deduster (B9) is collected
Fine grained and A furnace deduster (A9) collect fine grained be delivered to B furnace (B1), effectively improve the granule density of B furnace (B1), mention
The thermal discharge of flue gas and particle in high B furnace (B1) to B furnace heating surface (B11)；When the granule density of B furnace (B1) is sufficiently high,
The throwing coal rate to B furnace (B1) is increased, quick start B furnace under conditions of B furnace (B1) not overtemperature.
The remover ash discharge dust mouth of more circulating fluidized bed boiler is connected with grey library, is also connected with the burner hearth of boiler, removes
The flying dust that dirt device is collected can be delivered to grey library, can also be delivered to the burner hearth of boiler.When certain boiler startup, coal feeding amount
Few, burner hearth internal particle concentration is low, boiler there are overtemperature risks cannot quick load up；At this point, the pot that adjacent furnace is operated normally
The fly ash carry of furnace deduster trapping improves the ash concentration inside the starting trouble burner hearth, makes this to the boiler furnace of the starting
The boiler of platform starting quickly establishes grey balance, avoids burner hearth from causing overtemperature coking problem since ash concentration is low, boiler can be quick
Increasing productivity, effectively shortens starting time of boiler, improves the steam production of boiler, while reducing the overtemperature during boiler startup
Coking risk improves the safety of boiler operatiopn.
Claims (8)
1. a kind of circulating fluidized bed boiler quick start system, including A furnace and B furnace, it is characterised in that: the A furnace passes through A furnace
Ash inlet tube is connected with A furnace remover ash discharge dust mouth and B furnace remover ash discharge dust mouth respectively, and the B furnace is distinguished by B furnace ash inlet tube
It is connected with A furnace remover ash discharge dust mouth and B furnace remover ash discharge dust mouth；The import phase of the A outlet of still and A furnace cyclone separator
Connection, the outlet of the A furnace cyclone separator are connected with A furnace back-end ductwork import, the outlet of the A furnace back-end ductwork
It is connected with A furnace deduster import, the ash discharging hole of the A furnace deduster passes through A furnace ash inlet tube respectively and is connected with A furnace, leads to
B furnace ash inlet tube is crossed to be connected with B furnace, be connected by ash pipeline with Hui Ku；The B outlet of still and B furnace cyclone separator
Import is connected, and the outlet of B furnace cyclone separator is connected with B furnace back-end ductwork import, the outlet of B furnace back-end ductwork and B furnace
Deduster import is connected, and the ash discharging hole of B furnace deduster passes through B furnace ash inlet tube respectively and is connected with B furnace, by A furnace ash inlet tube
It is connected with A furnace, is connected by ash pipeline with Hui Ku.
2. a kind of circulating fluidized bed boiler quick start system according to claim 1, it is characterised in that: the A furnace
The grey valve of setting A furnace time in the connecting pipe of remover ash discharge dust mouth and A furnace ash inlet tube, A furnace remover ash discharge dust mouth and ash pipeline
A furnace is set into grey library valve, setting A furnace is into B in the connecting pipe of A furnace remover ash discharge dust mouth and B furnace ash inlet tube in connecting pipe
Furnace returns grey valve.
3. a kind of circulating fluidized bed boiler quick start system according to claim 1, it is characterised in that: the B furnace
The grey valve of setting B furnace time in the connecting pipe of remover ash discharge dust mouth and B furnace ash inlet tube, B furnace remover ash discharge dust mouth and ash pipeline
B furnace is set into grey library valve, setting B furnace is into A in the connecting pipe of B furnace remover ash discharge dust mouth and A furnace ash inlet tube in connecting pipe
Furnace returns grey valve.
4. a kind of circulating fluidized bed boiler quick start system according to claim 1 or 2, it is characterised in that: the A
Arrange that A furnace heating surface, A outlet of still are connected with the import of A furnace cyclone separator in furnace, the outlet of A furnace cyclone separator and A furnace
Material returning device import is connected, and the outlet of A furnace material returning device is connected with A furnace import.
5. a kind of circulating fluidized bed boiler quick start system according to claim 1 or 3, it is characterised in that: the B
Arrange that B furnace heating surface, B outlet of still are connected with the import of B furnace cyclone separator in furnace, the outlet of B furnace cyclone separator and B furnace
Material returning device import is connected, and the outlet of B furnace material returning device is connected with B furnace import.
6. a kind of starting method of circulating fluidized bed boiler quick start system according to claim 1, it is characterised in that:
The following steps are included: fuel and air burn in A furnace, combustion product flue gas carries bed material particle, coal ash particle, desulfurizing agent
Grain is mobile to A furnace top, and to A furnace heating surface heat release, flue gas carries particle and leaves A furnace later, enters A furnace cyclonic separation
Device, the coarse granule that flue gas carries are trapped by A furnace cyclone separator and through A furnace material returning device back to A furnace, and flue gas carries thin
Particle enters A furnace back-end ductwork after leaving A furnace cyclone separator together with flue gas, enters A furnace deduster, flue gas after completing heat release
Most fine graineds of middle carrying are collected by A furnace deduster, are collected the fine grained to get off and are arranged through A furnace remover ash discharge dust mouth
Out；Fuel and air burn in B furnace, and combustion product flue gas carries bed material particle, coal ash particle, sorbent particle on B furnace
Portion is mobile, and to B furnace heating surface heat release, flue gas carries particle and leaves B furnace later, enters B furnace cyclone separator, and flue gas carries
Coarse granule trapped by B furnace cyclone separator and through B furnace material returning device back to B furnace, fine grained and flue gas that flue gas carries
Enter B furnace back-end ductwork after leaving B furnace cyclone separator together, enters B furnace deduster after completing heat release, carried in flue gas exhausted
Most of fine grained is collected by B furnace deduster, is collected the fine grained to get off and is discharged through B furnace remover ash discharge dust mouth.
7. a kind of starting method of circulating fluidized bed boiler quick start system according to claim 6, it is characterised in that:
When B furnace operates normally, and starts A furnace, start following steps: in the starting of A furnace, the coal feeding amount of A furnace is few, and the particle in A furnace is dense
Spend it is low, it is low in the emission capacity of particle to the A furnace heating surface of the flue gas and its carrying of A furnace (A1), if launched at this time into A furnace
A large amount of coals, fire box temperature quickly increase, and particle overtemperature is be easy to cause to lead to coking failure；A furnace is closed into grey library valve, opens A
Furnace returns grey valve, and the fine grained that A furnace deduster is collected is delivered to A furnace by A furnace ash inlet tube；B furnace is closed into grey library valve and B
Furnace returns grey valve, opens B furnace into A furnace and returns grey valve, the fine grained that B furnace deduster is collected is delivered to A by A furnace ash inlet tube
Furnace；It is delivered to A furnace by the fine grained that the fine grained and B furnace deduster of collecting A furnace deduster are collected, effectively improves A furnace
Granule density, improve A furnace in flue gas and thermal discharge from particle to A furnace heating surface；When the granule density of A furnace is sufficiently high, add
Greatly to the throwing coal rate of A furnace, quick start A furnace under conditions of A furnace not overtemperature.
8. a kind of starting method of circulating fluidized bed boiler quick start system according to claim 6, it is characterised in that:
When A furnace operates normally, and starts B furnace, start following steps: in the starting of B furnace, the coal feeding amount of B furnace is few, and the particle in B furnace is dense
Spend it is low, it is low in the emission capacity of particle to the B furnace heating surface of the flue gas and its carrying of B furnace, if launched at this time into B furnace a large amount of
Coal, fire box temperature quickly increase, and particle overtemperature is be easy to cause to lead to coking failure；B furnace is closed into grey library valve, B furnace is opened and returns
The fine grained that B furnace deduster is collected is delivered to B furnace by B furnace ash inlet tube by grey valve；A furnace is closed to return into grey library valve and A furnace
Grey valve opens A furnace into B furnace and returns grey valve, the fine grained that A furnace deduster is collected is delivered to B furnace by B furnace ash inlet tube；It is logical
It crosses and the fine grained that fine grained and A furnace deduster that B furnace deduster is collected are collected is delivered to B furnace, the particle for effectively improving B furnace is dense
It spends, thermal discharge of the flue gas and particle in raising B furnace to B furnace heating surface；When the granule density of B furnace is sufficiently high, increase to B furnace
Throwing coal rate, quick start B furnace under conditions of B furnace not overtemperature.
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| CN106196010B (en) * | 2016-08-29 | 2019-03-05 | 江苏汇能锅炉有限公司 | A kind of flying dust recycling device for the low ash coal burning boiler that burns |
| CN111895391B (en) * | 2020-07-17 | 2022-11-01 | 东方电气集团东方锅炉股份有限公司 | Operation regulation and control method for preventing hearth from coking after BT (BT) of supercritical circulating fluidized bed boiler |
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