CN206682921U - A kind of station boiler multi-element heterogeneous afterheat utilizing system - Google Patents
A kind of station boiler multi-element heterogeneous afterheat utilizing system Download PDFInfo
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- CN206682921U CN206682921U CN201720413377.9U CN201720413377U CN206682921U CN 206682921 U CN206682921 U CN 206682921U CN 201720413377 U CN201720413377 U CN 201720413377U CN 206682921 U CN206682921 U CN 206682921U
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Abstract
The utility model discloses station boiler multi-element heterogeneous afterheat utilizing system, according to flue gas circulating direction, including：A gas bypass is additionally provided between the smoke inlet end of air preheater and smoke outlet, bypass high-pressure economizer and bypass low-pressure coal saver have been sequentially connected in series on gas bypass；According to air circulation direction, the arrival end of air preheater is also passed through a cold wind and secondary cold wind, and a cold wind is passed through coal pulverizer after converging again with another way first cooling by wind after air preheater and heat primary air cooler successively；Secondary cold wind is partly conveyed directly to burner hearth after air preheater preheats, and another part is sent to burner hearth after flowing through hot blast slag cooler；According to clinker discharge direction, the system also includes being connected in series hot blast slag cooler and water at low temperature slag cooler, and hot blast slag cooler is directly mounted at burner hearth bottom, and hot blast slag cooler is resent to burner hearth after being also passed through the secondary cold wind in part after air preheater preheats；Water at low temperature slag cooler is in parallel with bypass low-pressure coal saver.
Description
Technical field
The utility model belongs to energy source and power technical field, more particularly to a kind of station boiler multi-element heterogeneous UTILIZATION OF VESIDUAL HEAT IN system
System.
Background technology
At present, station boiler residual heat resources in China's are a lot, but only residual heat from boiler fume has obtained recycling.Also
In the presence of the residual heat resources not being utilized a lot.
There is no the boiler air and flue system of waste heat referring to Fig. 1, first flue gas caused by boiler combustion flows through burner hearth (1), sky
Air preheater (2), deduster (3) and air-introduced machine (4) flow to desulphurization system.Cold wind from pressure fan (5) passes through air preheat
Device heater is directly entered boiler furnace, and the cold wind from primary air fan (6) divides two-way, adds all the way by air preheater (2)
Turn into hot blast after heat, another way after cold-air flap (7) regulation with first via bout into after suitable temperature by coal pulverizer (8)
Into burner hearth.
Air temperature of coal pulverizer (8) outlet necessarily be in suitable temperature range, this temperature range according to ature of coal and
Coal pulverizer it is different and different.If temperature drift, the possibility of coal dust explosion increases, and the security of power plant's operation is by serious
Threaten；If temperature is relatively low, the moisture in coal is unable to evaporating completely and liquid is presented, and easily causes coal pulverizer outlet tube cell to block up
Plug.Therefore, Modern Power Plant adjusts coal pulverizer inlet air themperature, reaches control coal pulverizer typically by the aperture of cold-air flap (7)
The purpose of outlet temperature.
1st, boiler exhaust gas waste heat
For exhaust gas temperature typically more than 120 DEG C, heat loss due to exhaust gas accounts for 70~80% ratio of boiler heat loss, mesh
The preceding energy-saving principle for smoke discharging residual heat is：Utilize the cold First air and cold two of residual heat from boiler fume heating air inlet preheater
Secondary wind, air preheater outlet cigarette temperature accordingly raise.Therefore, method as shown in Figure 2 is additionally arranged air preheater bypass flue, on side
Setting bypass high-pressure economizer replaces part is high to add in the flue of road, and amount of energy saving is of a relatively high.But secondary hot-air temperature can be caused
Reduce, energy-saving effect is relatively low.
2nd, heat primary air waste heat
It is preceding it is stated that, in order to keep coal pulverizer (8) outlet be in suitable temperature range, by cold-air flap (7) adjust into
Enter the air themperature of coal pulverizer (8).During normal operation, the temperature of heat primary air enters coal pulverizer at 300 DEG C or so after mixing
(8) temperature is at 200 DEG C or so.Heat primary air drops to 200 DEG C from 300 DEG C and discharges partial heat, and this partial heat is directly unrestrained
Expense is fallen.
The existing method using heat primary air heat is：Cancel cold-air flap (7), all cold First air air inlets are pre-
Hot device (2).On the heat primary air pipeline of air preheater (2) outlet, the condensate of Steam Turbine Regenerative System is heated, instead of portion
Divide low add.On the premise of Coal-fired capacity is constant, generated energy is improved.
Above-mentioned heat primary air is using the shortcomings that system：First, the total blast volume increase of air inlet preheater, cause heat two
Secondary air temperature declines, and the amount of energy saving of system is impacted；Second, too big with heat primary air cooler heat transfer temperature difference, regulation enters heat
The condensing water flow of First air cooler, the influence to regulation coal pulverizer outlet wind-warm syndrome are limited.
3rd, the afterheat of slags of boiler
Generating plant pulverized coal boiler, ash content in ature of coal 90% ratio after burning become flying dust, as flue gas is from chimney
Discharge.Remaining 10%, become clinker and discharged from the furnace hopper of boiler.The temperature of clinker is very high, about at 1000 DEG C or so.Electricity
Factory generally uses slag tapping boiler, and high temperature furnace slag, which is fallen directly in the pond below furnace hopper, to cool, after wasting substantial amounts of heat,
Discharged by dragveyer.
Due to flue gas, heat primary air waste heat and afterheat of slags these three residual heat resources, temperature levels are different, at present not
A kind of system, consider above-mentioned three kinds of residual heat resources, optimize therrmodynamic system, improve therrmodynamic system economy.The utility model
For this problem, a kind of thermo-power station boiler multi-element heterogeneous afterheat utilizing system is proposed.It is so-called polynary, allow for three kinds or more
Kind residual heat resources.So-called heterogeneous, allowing for every kind of waste heat has different temperature grade.
Utility model content
In view of the above-mentioned problems, the purpose of this utility model is to propose station boiler multi-element heterogeneous afterheat utilizing system.This reality
Above-mentioned three kinds of residual heat resources are considered with novel integrated, therrmodynamic system is optimized, improves therrmodynamic system economy.
The utility model provides the first station boiler multi-element heterogeneous afterheat utilizing system.
The first station boiler multi-element heterogeneous afterheat utilizing system, according to flue gas circulating direction, including is sequentially connected in series
Air preheater, deduster, air-introduced machine and gas cooler；The smoke inlet end of air preheater and smoke outlet it
Between be additionally provided with a gas bypass, be sequentially connected in series on gas bypass bypass high-pressure economizer with bypass low-pressure coal saver；
According to air circulation direction, the arrival end of air preheater is also passed through a cold wind and secondary cold wind, a cold wind
Coal pulverizer is passed through after converging again with another way first cooling by wind after air preheater and heat primary air cooler successively；Secondary cold wind
Burner hearth is partly sent to after air preheater preheats, burner hearth is delivered to after partly being heated up via hot blast slag cooler.
According to clinker discharge direction, the system also includes being connected in series hot blast slag cooler and water at low temperature slag cooler, and hot blast is cold
Slag device is directly mounted at burner hearth bottom, and hot blast slag cooler is also passed through after the secondary secondary hot blast in the part after air preheater preheats again
It is sent to burner hearth；Water at low temperature slag cooler is arranged in parallel with air preheater bypass low-pressure coal saver.
Further, air preheater is connected by First air steam air heater with primary air fan, and the First air steam air heater is used
In the cold wind that heating primary air fan transmission comes；Air preheater is connected by Secondary Air steam air heater with pressure fan, and described two
Secondary wind steam air heater is used to heat the secondary cold wind that pressure fan transmission comes.
Further, gas cooler by closed circle water system respectively with First air steam air heater and Secondary Air steam air heater
It is connected；
Further, it is described bypass high-pressure economizer and bypass low-pressure coal saver respectively with high-pressure heater and low-pressure heating
Device is in parallel.
The utility model provides second of station boiler multi-element heterogeneous afterheat utilizing system.
Second of station boiler multi-element heterogeneous afterheat utilizing system, it is characterised in that according to flue gas circulating direction, including according to
The secondary air preheater being connected in series, deduster, air-introduced machine and gas cooler；In the smoke inlet end of air preheater and cigarette
A gas bypass is additionally provided between the gas port of export, it is low with bypassing that bypass high-pressure economizer has been sequentially connected in series on gas bypass
Press economizer；
According to air circulation direction, the arrival end of air preheater is also passed through a cold wind and secondary cold wind, a cold wind
Coal pulverizer is passed through after converging again with another way first cooling by wind after air preheater and heat primary air cooler successively；Secondary cold wind
Burner hearth is partly sent to after air preheater preheats, burner hearth is delivered to after partly being heated up via hot blast slag cooler.
According to clinker discharge direction, the system also includes being connected in series water at low temperature slag cooler and high-temperature water slag cooler, high temperature
Water slag cooler is directly mounted at burner hearth bottom, and water at low temperature slag cooler and high-temperature water slag cooler add with low-pressure heater and high pressure respectively
Hot device is in parallel.
Further, the air preheater is connected by First air steam air heater with primary air fan, the First air warm wind
Device is used to heat the cold wind that primary air fan transmission comes；Air preheater is connected by Secondary Air steam air heater with pressure fan, institute
Secondary Air steam air heater is stated to be used to heat the secondary cold wind that pressure fan transmission comes.
Further, the gas cooler is warmed up with First air steam air heater and Secondary Air respectively by closed circle water system
Wind device is connected；
Further, it is described bypass high-pressure economizer and bypass low-pressure coal saver respectively with high-pressure heater and low-pressure heating
Device and company.
The utility model provides the third station boiler multi-element heterogeneous afterheat utilizing system.
The third station boiler multi-element heterogeneous afterheat utilizing system, it is characterised in that according to flue gas circulating direction, including according to
The secondary air preheater being connected in series, deduster, air-introduced machine and gas cooler；In the smoke inlet end of air preheater and cigarette
A gas bypass is additionally provided between the gas port of export, it is low with bypassing that bypass high-pressure economizer has been sequentially connected in series on gas bypass
Press economizer；
According to air circulation direction, the arrival end of air preheater is also passed through a cold wind and secondary cold wind, a cold wind
Coal pulverizer is passed through after converging again with another way first cooling by wind after air preheater and heat primary air cooler successively；Secondary cold wind
Burner hearth is partly sent to after air preheater preheats, burner hearth is delivered to after partly being heated up via hot blast slag cooler.
According to clinker discharge direction, the system also includes being connected in series hot blast slag cooler and low-temperature air-cooling slag device, and hot blast is cold
Slag device is directly mounted at burner hearth bottom, and hot blast slag cooler is also passed through after the secondary secondary hot blast in the part after air preheater preheats again
It is sent to burner hearth；Secondary cold wind after being heated by closed Water System delivers to air preheater through low-temperature air-cooling slag device.
Further, the air preheater is directly connected with primary air fan, and primary air fan directly send a cold wind
To air preheater；Low-temperature air-cooling slag device is directly connected with pressure fan, and secondary cold wind is fed directly to low-temperature air-cooling by pressure fan
Slag device.
The beneficial effects of the utility model are：
(1) the utility model realizes the cascade utilization of heat primary air, flue gas and afterheat of slags, according to heat primary air, cigarette
The temperature levels difference suitable low-temperature receiver working medium of heating-up temperature of these three residual heat resources of gas and clinker, such as：High warm air, low temperature
Wind, high-temperature water, water at low temperature；Consider heat primary air, flue gas and clinker these three residual heat resources, optimize therrmodynamic system,
Improve therrmodynamic system economy.
(2) the utility model utilizes bypass flue high-pressure economizer, bypass flue low-pressure coal saver and heat primary air cooling
The condensate of device equipment heating Steam Turbine Regenerative System or feedwater, instead of part height plus or the low effect added.It is constant in Coal-fired capacity
On the premise of, the economy of raising generated output and unit.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrate be used for explain the application, do not form the improper restriction to the application.
Fig. 1 is the station boiler system structure diagram of no UTILIZATION OF VESIDUAL HEAT IN；
Fig. 2 is the station boiler system structure diagram that a kind of fume afterheat utilizes；
Fig. 3 is a kind of structural representation of station boiler multi-element heterogeneous afterheat utilizing system embodiment one；
Fig. 4 is a kind of structural representation of station boiler multi-element heterogeneous afterheat utilizing system embodiment two；
Fig. 5 is a kind of structural representation of station boiler multi-element heterogeneous afterheat utilizing system embodiment three；
Fig. 6 is a kind of station boiler multi-element heterogeneous afterheat utilizing system example IV structural representation；
Fig. 7 is a kind of structural representation of station boiler multi-element heterogeneous afterheat utilizing system embodiment five.
Wherein, 1, burner hearth；2nd, air preheater；3rd, deduster；4th, air-introduced machine；5th, pressure fan；6th, primary air fan；7th, cold wind
Door；8th, coal pulverizer；9th, high-pressure heater；10th, low-pressure heater；11st, feed pump；12nd, condensate pump；13rd, gas cooler；
14th, Secondary Air steam air heater；15th, First air steam air heater；16th, high-pressure economizer is bypassed；17th, low-pressure coal saver is bypassed；18th, hot blast is cold
Slag device；19th, water at low temperature slag cooler；20th, heat primary air cooler；21st, high-temperature water slag cooler；22nd, low-temperature air-cooling slag device.
Embodiment
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
Case study on implementation one
Fig. 3 is a kind of structural representation of station boiler multi-element heterogeneous afterheat utilizing system embodiment one.
As shown in figure 3, station boiler multi-element heterogeneous afterheat utilizing system, according to flue gas circulating direction, including is sequentially connected in series
Air preheater (2), deduster (3), air-introduced machine (4) and the gas cooler (13) of connection；Flue gas in air preheater (2)
A gas bypass is additionally provided between arrival end and smoke outlet, bypass high pressure has been sequentially connected in series on gas bypass and has saved coal
Device (16) and bypass low-pressure coal saver (17)；
According to air circulation direction, the arrival end of air preheater (2) is also passed through a cold wind and secondary cold wind, once cold
Wind is passed through coal pulverizer after converging again with another way first cooling by wind after air preheater (2) and heat primary air cooler (20) successively
(8)；Secondary cold wind is partly sent to burner hearth (1) after air preheater (2) preheating, and another part passes through hot blast slag cooler (18)
After be sent to burner hearth (1)；
According to clinker discharge direction, the system also includes being connected in series hot blast slag cooler (18) and water at low temperature slag cooler
(19), hot blast slag cooler (18) is directly mounted at burner hearth (1) bottom, and hot blast slag cooler (18) is also passed through through air preheater (2)
Burner hearth (1) is resent to after secondary cold wind after preheating；Water at low temperature slag cooler (19) water side is in parallel with low-pressure heater, instead of portion
Divide the low effect added.
In this embodiment, air preheater (2) is connected by First air steam air heater (15) with primary air fan (6), described
First air steam air heater (15) is used to heat the cold wind that primary air fan (6) transmission comes；Air preheater (2) is warmed up by Secondary Air
Wind device (14) is connected with pressure fan (5), and the Secondary Air steam air heater (14) is used to heat the secondary cold of pressure fan (5) transmission
Wind.
The utility model utilize cold-air flap (7) be used for control by primary air fan (6) into the First air in coal pulverizer (8)
Flow.
Gas cooler (13) by closed circle water system respectively with First air steam air heater (14) and Secondary Air steam air heater
(15) it is connected.
Bypass high-pressure economizer (16) with bypass low-pressure coal saver (17) respectively with high-pressure heater (9) and low-pressure heater
(10) it is in parallel.
The utility model is using bypass high-pressure economizer (16) and bypass low-pressure coal saver (17) heating steam turbine backheat system
The condensate of system or feedwater, instead of part it is high plus or it is low plus effect so that on the premise of Coal-fired capacity is constant, improve generating work(
The economy of rate and unit.
Wherein, condensate pump (12) is connected with low-pressure heater (10), and feed pump (11) is connected with high-pressure heater (9).
Come pair with reference to flue gas flow, air flow and clinker flow in station boiler multi-element heterogeneous afterheat utilizing system
The system is described in detail：
Flue gas flow：Air preheater sets bypass flue, and the flue gas from boiler enters rotary regenerative air preheater (2)
It is divided into two-way before.Air preheater (2) is flowed through all the way, and flue gas heat is passed into a Secondary Air；Another way flows through bypass cigarette
Road, in bypass high-pressure economizer (16) and bypass low-pressure coal saver (17), by flue gas heat be delivered separately to part feedwater and
Condensate, instead of the effect of partial high pressure heater (9) and low-pressure heater (10).Two-way flue gas flows separately through dedusting after converging
Device (3), air-introduced machine (4) and gas cooler (13).In gas cooler (13), flue gas heat is added by closed cycle water
Hot one or two cold wind.
Air flow：One Secondary Air enters First air steam air heater (15) by primary air fan (6) and pressure fan (5) respectively
With Secondary Air steam air heater (14), one or two cold wind are heated using smoke discharging residual heat.A heated Secondary Air enters swinging air
Preheater (2), heat primary air is fed water by heat primary air cooler (20) heating part, instead of partial high pressure heater (9)
Effect.Heat primary air after cooled is mixed into suitable temperature with the First air come from primary air fan by bypass air door (7),
Into coal pulverizer (8).A mixture of powder and dust is directly entered burner hearth after coal pulverizer (8) outflow.Hot Secondary Air part is directly entered
Enter burner hearth, be partly introduced in high temperature wind slag cooler (18), using high temperature furnace slag waste heat, heat hot Secondary Air, be then fed into
Burner hearth.
Condense Water flow-path：(specific extraction location is because of the actual feelings of unit for water from Steam Turbine Regenerative System low-pressure section
Condition is different), divide two-way in parallel.Entering bypass low-pressure coal saver (17) all the way, another way enters water at low temperature slag cooler (19),
Converge after absorbing preheater bypass flue flue gas heat and clinker low temperature exhaust heat respectively, it is (specific to return to steam turbine condensate system
Reentry point position because unit actual conditions it is different).
To Water flow-path：Water from feedwater pump discharge, two-way is in parallel, enters bypass high-pressure economizer (16) all the way, another
Road enters heat primary air cooler (20), converges after absorbing air preheater bypass flue gas heat and heat primary air high-temperature residual heat respectively,
Return to steam turbine water supply system.
Clinker flow：High-temperature boiler clinker cools by high temperature wind slag cooler (18) and water at low temperature slag cooler (19) respectively,
High temperature furnace slag heat transfer is gone out into boiler to high warm air with water at low temperature heel row.
Case study on implementation two
As shown in figure 4, it is to instead of high temperature with high-temperature water slag cooler (21) with the main distinction of case study on implementation one air-cooled
Slag device (18), the high-temperature water slag cooler (21) is in parallel with heat primary air cooler (20) and bypass high-pressure economizer (16) three,
Heating comes from the feedwater of feed pump (11) outlet, outlet hot water and the afterbody high pressure of three equipment (16,20,21) in parallel
Heater (9) outlet water lines are connected, instead of the effect of partial high pressure heater (9).Remaining pipe-line system and case study on implementation one
It is approximate.
Case study on implementation three
As shown in figure 5, it is to instead of low-temperature air-cooling with low-temperature air-cooling slag device (22) with the main distinction of case study on implementation one
Slag device (19), the low-temperature air-cooling slag device (22) mainly heats the Secondary Air from Secondary Air steam air heater (14), by boiler low-temperature stove
After slag waste heat passes to Secondary Air, rotary regenerative air preheater (2) is entered back into.Other pipelines system is approximate with case study on implementation one.
Case study on implementation four
As shown in fig. 6, it is with the main distinction of first three case study on implementation：The mode of heating of air preheater intake air
Difference, foregoing three cases are respectively provided with gas cooler (13), First air steam air heater (14) and Secondary Air steam air heater (15) composition
Closed circle water system utilize cold wind of the fume afterheat heating from primary air fan (6) and pressure fan (5).
The air mode of heating of present case is：Cold wind from pressure fan (5), first flow through low-temperature air-cooling slag device (22) and carry
Rise wind-warm syndrome.Two-way is then divided into, is directly entered rotary regenerative air preheater (2) as Secondary Air all the way, another way is set once
Enter rotary regenerative air preheater (2) after blower fan (6) lifting pressure head.
Due to eliminating closed cycle formula system, therefore the system is not provided with First air steam air heater (15) and Secondary Air warm wind
Device (14), gas cooler (13) is in parallel with bypass low-pressure coal saver (17), and heating comes from steam turbine one-level low-pressure heating
The condensate of device (10) outlet, the outlet hot water of two equipment (13,17) in parallel go out saliva with another grade of low-pressure heater (10)
Pipeline is connected, instead of the low effect for adding (10) in part.Remaining system is approximate with case study on implementation three.
Case study on implementation five
As shown in fig. 7, case study on implementation five is the simple version of case study on implementation four, part investment can be reduced, is reached than implementing
The slightly lower energy-saving effect of case five.It is with the main distinction of case study on implementation four, eliminates the bypass cigarette of air preheater (2)
Road, bypass high-pressure economizer (16) and bypass low-pressure coal saver (17).Partial high pressure is replaced using heat primary air cooler (20)
Heater (9), part low-pressure heater (10) is replaced with gas cooler (13), reaches energy-saving effect.Other systems are with implementing
Case four is similar.
The utility model realizes the cascade utilization of heat primary air, flue gas and afterheat of slags, according to heat primary air, flue gas and
The temperature levels difference suitable low-temperature receiver working medium of heating-up temperature of these three residual heat resources of clinker, such as：High warm air, low temperature wind, height
Warm water, water at low temperature；Heat primary air, flue gas and clinker these three residual heat resources are considered, have optimized therrmodynamic system, improve
Therrmodynamic system economy.
The utility model is set using bypass flue high-pressure economizer, bypass flue low-pressure coal saver and heat primary air cooler
Condensate or feedwater for heating Steam Turbine Regenerative System, instead of part height plus or the low effect added.Before Coal-fired capacity is constant
Put, improve the economy of generated output and unit.
It is not new to this practicality although above-mentioned specific embodiment of the present utility model is described with reference to accompanying drawing
The limitation of type protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, ability
Field technique personnel need not pay the various modifications that creative work can make or deformation still in protection model of the present utility model
Within enclosing.
Claims (10)
1. a kind of station boiler multi-element heterogeneous afterheat utilizing system, it is characterised in that according to flue gas circulating direction, including go here and there successively
Join air preheater, deduster, air-introduced machine and the gas cooler of connection；Go out at the smoke inlet end of air preheater and flue gas
Mouth is additionally provided with a gas bypass between end, and bypass high-pressure economizer has been sequentially connected in series on gas bypass and has been saved with bypass low pressure
Coal device；
According to air circulation direction, the arrival end of air preheater is also passed through a cold wind and secondary cold wind, and a cold wind is successively
Coal pulverizer is passed through after converging again with another way first cooling by wind after air preheater and heat primary air cooler；Secondary cold wind is through sky
Burner hearth is partly conveyed directly to after air preheater preheating, another part flows through hot blast slag cooler and is sent to burner hearth；
According to clinker discharge direction, the system also includes being connected in series hot blast slag cooler and water at low temperature slag cooler, hot blast slag cooler
Burner hearth bottom is directly mounted at, hot blast slag cooler is resent to stove after being also passed through the secondary cold wind after air preheater preheats
Thorax；Water at low temperature slag cooler water side is in parallel with bypass low-pressure coal saver.
2. a kind of station boiler multi-element heterogeneous afterheat utilizing system as claimed in claim 1, it is characterised in that the air is pre-
Hot device is connected by First air steam air heater with primary air fan, and the First air steam air heater is used to heat primary air fan transmission comes one
Secondary cold wind；Air preheater is connected by Secondary Air steam air heater with pressure fan, and the Secondary Air steam air heater is used to heat pressure fan
The secondary cold wind that transmission comes.
3. a kind of station boiler multi-element heterogeneous afterheat utilizing system as claimed in claim 2, it is characterised in that the flue gas is cold
But device is connected with First air steam air heater and Secondary Air steam air heater respectively by closed circle water system.
4. a kind of station boiler multi-element heterogeneous afterheat utilizing system as claimed in claim 3, it is characterised in that the bypass is high
Press economizer and bypass low-pressure coal saver in parallel with high-pressure heater and low-pressure heater respectively.
5. a kind of station boiler multi-element heterogeneous afterheat utilizing system, it is characterised in that according to flue gas circulating direction, including go here and there successively
Join air preheater, deduster, air-introduced machine and the gas cooler of connection；Go out at the smoke inlet end of air preheater and flue gas
Mouth is additionally provided with a gas bypass between end, and bypass high-pressure economizer has been sequentially connected in series on gas bypass and has been saved with bypass low pressure
Coal device；
According to air circulation direction, the arrival end of air preheater is also passed through a cold wind and secondary cold wind, and a cold wind is successively
Coal pulverizer is passed through after converging again with another way first cooling by wind after air preheater and heat primary air cooler；Secondary cold wind is through sky
Burner hearth is partly conveyed directly to after air preheater preheating, another part is sent to burner hearth after flowing through hot blast slag cooler；
According to clinker discharge direction, the system also includes being connected in series water at low temperature slag cooler and high-temperature water slag cooler, high-temperature water cooling
Slag device is directly mounted at burner hearth bottom, and water at low temperature slag cooler and high-temperature water slag cooler are low with bypass high-pressure economizer and bypass respectively
Press economizer in parallel.
6. a kind of station boiler multi-element heterogeneous afterheat utilizing system as claimed in claim 5, it is characterised in that the air is pre-
Hot device is connected by First air steam air heater with primary air fan, and the First air steam air heater is used to heat primary air fan transmission comes one
Secondary cold wind；Air preheater is connected by Secondary Air steam air heater with pressure fan, and the Secondary Air steam air heater is used to heat pressure fan
The secondary cold wind that transmission comes.
7. a kind of station boiler multi-element heterogeneous afterheat utilizing system as claimed in claim 6, it is characterised in that the flue gas is cold
But device is connected with First air steam air heater and Secondary Air steam air heater respectively by closed circle water system.
8. a kind of station boiler multi-element heterogeneous afterheat utilizing system as claimed in claim 7, it is characterised in that the bypass is high
Pressure economizer and bypass low-pressure coal saver are connected with high-pressure heater and low-pressure heater respectively.
9. a kind of station boiler multi-element heterogeneous afterheat utilizing system, it is characterised in that according to flue gas circulating direction, including go here and there successively
Join air preheater, deduster, air-introduced machine and the gas cooler of connection；Go out at the smoke inlet end of air preheater and flue gas
Mouth is additionally provided with a gas bypass between end, and bypass high-pressure economizer has been sequentially connected in series on gas bypass and has been saved with bypass low pressure
Coal device；
According to air circulation direction, the arrival end of air preheater is also passed through a cold wind and secondary cold wind, and a cold wind is successively
Coal pulverizer is passed through after converging again with another way first cooling by wind after air preheater and heat primary air cooler；Secondary cold wind is through sky
Burner hearth is sent to after air preheater preheating；
According to clinker discharge direction, the system also includes being connected in series hot blast slag cooler and low-temperature air-cooling slag device, hot blast slag cooler
It is directly mounted at burner hearth bottom；Secondary cold wind after being heated delivers to air preheater through low-temperature air-cooling slag device.
A kind of 10. station boiler multi-element heterogeneous afterheat utilizing system as claimed in claim 9, it is characterised in that the air
Preheater is directly connected with primary air fan, and a cold wind is fed directly to air preheater by primary air fan；Low-temperature air-cooling slag device
Directly it is connected with pressure fan, secondary cold wind is fed directly to low-temperature air-cooling slag device by pressure fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720413377.9U CN206682921U (en) | 2017-04-19 | 2017-04-19 | A kind of station boiler multi-element heterogeneous afterheat utilizing system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895390A (en) * | 2017-04-19 | 2017-06-27 | 山东大学 | A kind of station boiler multi-element heterogeneous afterheat utilizing system |
| CN109282280A (en) * | 2018-09-29 | 2019-01-29 | 中国能源建设集团广东省电力设计研究院有限公司 | CFB Boiler water combined recovery heat of slags system and its control method |
| CN109404958A (en) * | 2018-11-12 | 2019-03-01 | 南京博沃科技发展有限公司 | A kind of energy efficiency anti-blocking method and system based on air preheater bypass flue |
-
2017
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895390A (en) * | 2017-04-19 | 2017-06-27 | 山东大学 | A kind of station boiler multi-element heterogeneous afterheat utilizing system |
| CN109282280A (en) * | 2018-09-29 | 2019-01-29 | 中国能源建设集团广东省电力设计研究院有限公司 | CFB Boiler water combined recovery heat of slags system and its control method |
| CN109404958A (en) * | 2018-11-12 | 2019-03-01 | 南京博沃科技发展有限公司 | A kind of energy efficiency anti-blocking method and system based on air preheater bypass flue |
| CN109404958B (en) * | 2018-11-12 | 2024-02-02 | 南京博沃科技发展有限公司 | Energy-saving synergistic anti-blocking method and system based on bypass flue of air preheater |
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