CN109028047A - A kind of recirculating fluidized bed thermal power plant unit slag cooler afterheat utilizing system - Google Patents
A kind of recirculating fluidized bed thermal power plant unit slag cooler afterheat utilizing system Download PDFInfo
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- CN109028047A CN109028047A CN201810701489.3A CN201810701489A CN109028047A CN 109028047 A CN109028047 A CN 109028047A CN 201810701489 A CN201810701489 A CN 201810701489A CN 109028047 A CN109028047 A CN 109028047A
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- water
- heat supply
- supply network
- slag cooler
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/24—Devices for removal of material from the bed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2206/00—Fluidised bed combustion
- F23C2206/10—Circulating fluidised bed
Abstract
The invention discloses a kind of recirculating fluidized bed thermal power plant unit slag cooler afterheat utilizing systems, belong to Sector of Cfb Boilers, including heat supply network return water cooling system and condensation water cooling system, the low-pressure heater of the condensation water cooling system and the heat exchangers for district heating of heat supply network return water cooling system are in parallel with slag cooler, the low-pressure heater is parallel in the coagulation hydroenergy backwater bypass line and condensed water water inlet bypass line at slag cooler both ends and is respectively equipped with valve one and valve two, the heat exchangers for district heating is parallel in the heat supply network return water bypass line and heat supply network water inlet bypass line at slag cooler both ends and is respectively equipped with valve three and valve four.The present invention is realized deslagging heat recovery to condensate system in non-heating period, and deslagging heat is directly used in heat supply by Heating Period, has carried out flexible utilization to deslagging heat.
Description
Technical field
The present invention relates to Sector of Cfb Boilers, and in particular to a kind of recirculating fluidized bed thermal power plant unit slag cooler
Afterheat utilizing system.
Background technique
Properties of CFB is due to the advantages such as its fuel tolerance is wide, efficient desulfuration in furnace, NOx emission are low, in recent years
Develop very fast.But Properties of CFB deslagging temperature is very high, often reaches 850 DEG C or more, deslagging heat loss is very big, such as
Fruit can recycle this partial heat, then can greatly improve economy of power plant.
The UTILIZATION OF VESIDUAL HEAT IN mode generallyd use at present is by deslagging heat recovery to condensate system, and specific practice is to arrange
Slag cooler is arranged in cinder notch, draws condensed water all the way from the import of certain grade of low-pressure heater and enters slag cooler, absorbs bottom ash heat, and will
Heat returns to condensate system, and system circulation caloric receptivity reduces, to improve the heat-economy of unit.
This UTILIZATION OF VESIDUAL HEAT IN mode is not very economical in fact, on the one hand because drawing all the way from certain low-pressure heater entrance
Condensed water removes slag cooler, so that reducing into the low main condensate amount added is bypassed, corresponding regenerative steam amount is also reduced, and reduces
Backheat effect；On the other hand, if slag cooler return water position is improper, return water temperature is lower than the main condensate temperature for importing point,
The effect of UTILIZATION OF VESIDUAL HEAT IN can then be further decreased.
In this regard, application No. is 201710385560.7 Chinese patents to disclose a kind of cold slag of recirculating fluidized bed thermal power plant unit
Slag cooler waste heat can be directly used in heat supply in Heating Period by device residual heat using device.The apparatus structure is as shown in Figure 1, include
Heat exchangers for district heating, the heat exchangers for district heating are connect with main road heat supply network water return pipeline, are parallel with heat on main road heat supply network water return pipeline
Net return water bypass line, the heat supply network return water bypass line and slag cooler are connected to the pipeline that cooling water enters slag cooler, pass through
Cooling water and main road heat supply network return water after slag cooler heat absorption heating, which merge into, to be made to connect with the water inlet of heat exchangers for district heating all the way, institute
It states heat exchangers for district heating to connect with four pumping extraction lines, increase heat supply network return water temperature by heat supply steam extraction, heat exchangers for district heating goes out
The mouth of a river is connect by pipeline with heat supply network water inlet line, and heat supply network return water reaches the temperature of heat supply needs and gives heat user.The present invention
Slag cooler waste heat is directly used in heat supply, good economy performance, unit can improve the peak modulation capacity of unit with multiple electricity.
But the device is only capable of using in Heating Period, the above-mentioned prior art can not achieve recirculating fluidized bed thermal power plant unit and exist
The flexible utilization of Heating Period and non-heating period to deslagging heat.
Summary of the invention
The present invention In view of the above shortcomings of the prior art, provides a kind of recirculating fluidized bed thermal power plant unit slag cooler waste heat
Using system, the present invention be may be implemented deslagging heat recovery to condensate system in non-heating period, and Heating Period is by deslagging heat
It is directly used in heat supply, flexible utilization has been carried out to deslagging heat.
The technical solution of present invention solution technical problem are as follows:
A kind of recirculating fluidized bed thermal power plant unit slag cooler afterheat utilizing system, including heat supply network return water cooling system and condensed water
Cooling system, it is described condensation water cooling system low-pressure heater and heat supply network return water cooling system heat exchangers for district heating with cold slag
Device is in parallel, and the low-pressure heater is parallel to the coagulation hydroenergy backwater bypass line and condensed water water inlet bypass line at slag cooler both ends
On be respectively equipped with valve one and valve two, the heat exchangers for district heating is parallel to the heat supply network return water bypass line and heat at slag cooler both ends
Valve three and valve four are respectively equipped in net water inlet bypass line.
Further, the low-pressure heater water inlet is connect with coagulation hydroenergy backwater main pipeline, the coagulation hydroenergy backwater master
The coagulation hydroenergy backwater bypass line is parallel on pipeline, coagulation hydroenergy backwater bypass line is connect with slag cooler water inlet, described
Slag cooler water outlet is connect with condensed water water inlet bypass line, and condensed water water inlet bypass line returns to low-pressure heater water outlet
Mouthful.
Further, the heat exchangers for district heating water inlet is connect with heat supply network backwater main pipeline, in heat supply network backwater main pipeline simultaneously
It is associated with the heat supply network return water bypass line, heat supply network return water bypass line is connect with slag cooler water inlet, and slag cooler water outlet passes through
The heat supply network water inlet bypass line is connect with heat supply network water inlet main pipeline.
Further, cold pulp water is equipped with before the slag cooler water inlet to pump.
Further, the heat exchangers for district heating is connect with extraction line, the heat exchangers for district heating water outlet and the heat supply network
Main pipeline of intaking connects.
Further, the coagulation hydroenergy backwater bypass line is equipped with electric adjustable valve one, the heat supply network return water bypass line
It is equipped with electric adjustable valve two, the extraction line is equipped with electric adjustable valve three.
Further, the valve one, valve two, valve three and valve four are all made of gate valve.
Beneficial effects of the present invention:
1, in non-heating period, valve one and valve two are opened, closes valve three and valve four, is i.e. closing heat supply network return water is cold
But system opens condensation water cooling system, at this point, condensed water, as cooling water, a part of condensed water is responsible for from coagulation hydroenergy backwater
Road enters the heat exchange of low-pressure heater water inlet, enters condensate system after condensed water heating；Another part condensed water passes sequentially through
Coagulation hydroenergy backwater main pipeline and coagulation hydroenergy backwater bypass line, and enter after the cold pulp water pump boosting before slag cooler water inlet
Slag cooler cools down bottom ash, and temperature increases after the condensed water absorption heat of bottom ash, from slag cooler water outlet enters condensate system.
In Heating Period, valve one and valve two are closed, opens valve three and valve four, that is, closes condensation water cooling system,
Heat supply network return water cooling system is opened, at this point, heat supply network return water, as cooling water, a part of heat supply network return water passes through heat supply network backwater main pipeline
It exchanges heat into the high temperature steam extraction in heat exchangers for district heating, with heat exchangers for district heating, temperature after the heat of heat supply network return water absorption high temperature steam extraction
It increases, into heat supply network water inlet main pipeline；Another part heat supply network return water passes sequentially through heat supply network backwater main pipeline and heat supply network return water branch
Pipeline, and enter the cooling bottom ash of slag cooler after the cold pulp water pump boosting before slag cooler water inlet, heat supply network return water absorbs bottom
Temperature increases after the heat of slag, enters heat supply network water inlet main pipeline from slag cooler water outlet by heat supply network water inlet bypass line.
Slag cooler waste heat is directly used in heat supply and compared with slag cooler waste heat is recycled to condensate system by Heating Period, a side
Face will not squeeze the steam extraction amount of low-pressure heater, and backheat effect is more preferable；Another aspect heat supply network return water absorbs heat, row from slag cooler
The higher heat supply steam extraction of efficiency grade has been squeezed, unit can be with multiple electricity, and economy is more preferable, and unit heat supply steam extraction amount is reduced,
Thermoelectricity decoupling is realized to a certain extent, and peak load regulation ability is also enhanced.
By control valve one, valve two, valve three and valve four, Heating Period and two line cooling system of non-heating period are realized
Free switching, Heating Period using heat supply network return water be used as cooling water, non-heating period use condensed water as cooling water so that
Slag cooler waste heat is directly used in heat supply by Heating Period, and slag cooler waste heat is recycled to condensate system by non-heating period.
2, when the work of condensation water cooling system, condensed water can not only be heated up by low-pressure heater, can be also passed through
Slag cooler heats up condensed water, and the deslagging waste heat in slag cooler is utilized, improves heating efficiency, is suitable for non-heating period.
3, when heat supply network return water cooling system works, it is cold the waste heat of deslagging in slag cooler can be directly recovered to heat supply network return water
But system reduces the steam extraction amount of heat exchangers for district heating, is both effectively utilized residual heat resources, also improves heating efficiency, in heating
Phase, heat supply network return water cooling system are especially applicable in.
4, it is equipped with cold pulp water before slag cooler water inlet to pump, cold pulp water pump provides conveying for the cooling water into lag cooler and moves
Power.
5, it is connect by heat exchangers for district heating with extraction line, heat exchangers for district heating water outlet and heat supply network water inlet main pipeline connect
It connects, the high temperature steam extraction in pump-line can be subjected to heat with the heat supply network return water in heat exchangers for district heating and exchanged, heat supply network return water is inhaled
Heating enters heat supply network water inlet main pipeline after receiving the heat of high temperature steam extraction, is used for heat supply.
6, by coagulation hydroenergy backwater bypass line be equipped with electric adjustable valve one, can according to deslagging heat number, lead to
It crosses electric adjustable valve one and adjusts the flow for entering the condensed water of slag cooler；Electric adjustable valve is additionally provided in heat supply network return water bypass line
Two, according to deslagging heat number, by electric adjustable valve two adjust enter slag cooler heat supply network return water flow；In extraction line
It is equipped with electric adjustable valve three, to adjust the flow into the high temperature steam extraction of heat exchangers for district heating.
7, the valve one, valve two, valve three and valve four are all made of gate valve, and gate valve has outstanding sealing performance,
Be opened and closed relatively labor-saving, sealing surface is small by medium erosion when standard-sized sheet, is not limited by medium flow direction, have double fluid to, structure length compared with
It is small, it is cheap, it is applied widely.
Detailed description of the invention
Fig. 1 is that application No. is 201710385560.7 recirculating fluidized bed thermal power plant unit slag cooler residual heat using device structures
Schematic diagram；
Fig. 2 is a kind of recirculating fluidized bed thermal power plant unit slag cooler afterheat utilizing system figure of the invention；
Fig. 3 is the schematic diagram of one slag cooler afterheat utilizing system of scheme；
Fig. 4 is two slag cooler afterheat utilizing system of scheme.
Description of symbols: 101- coagulation hydroenergy backwater main pipeline, 102- coagulation hydroenergy backwater bypass line, 103- condensed water into
Water bypass line, 201- gate valve one, 202- gate valve two, 203- gate valve three, 204- gate valve four, 301- electric adjustable valve one, 302- electricity
Dynamic tune valve two, 303- electric adjustable valve three, the cold pulp water pump of 4-, 501- heat supply network backwater main pipeline, 502- heat supply network return water bypass line,
503- heat supply network water inlet bypass line, 504- heat supply network water inlet main pipeline, 6- extraction line.
Specific embodiment
In order to better understand the present invention, the present invention is further elaborated with reference to the accompanying drawing:
As shown in Fig. 2, a kind of recirculating fluidized bed thermal power plant unit slag cooler afterheat utilizing system of the invention, cold comprising two-way
But water system, is heat supply network return water cooling system all the way, is condensation water cooling system all the way.
The condensation water cooling system includes low-pressure heater, and the low-pressure heater water inlet and coagulation hydroenergy backwater are responsible for
Road 101 connects, and is parallel with coagulation hydroenergy backwater bypass line 102, the coagulation hydroenergy backwater on the coagulation hydroenergy backwater main pipeline 101
Bypass line 102 is connect with slag cooler water inlet, and the slag cooler water outlet is connect with condensed water water inlet bypass line 103, institute
It states condensed water water inlet bypass line 103 and returns to low-pressure heater water outlet.
The heat supply network return water cooling system includes heat exchangers for district heating, and the heat exchangers for district heating water inlet and heat supply network return water are responsible for
Road 501 connects, and is parallel with heat supply network return water bypass line 502, the heat supply network return water bypass duct in the heat supply network backwater main pipeline 501
Road 502 is connect with slag cooler water inlet, and the slag cooler water outlet is responsible for by heat supply network water inlet bypass line 503 and heat supply network water inlet
Road 504 connects.
Before the slag cooler water inlet be equipped with cold pulp water pump 4, the heat supply network return water bypass line 502 cold pulp water pump 4 it
It is preceding to be synthesized all the way with 102 pipeline of coagulation hydroenergy backwater branch.
The coagulation hydroenergy backwater bypass line 102, condensed water water inlet bypass line 103,502 and of heat supply network return water bypass line
Gate valve 1, gate valve 2 202, gate valve 3 203 and gate valve 4 204 are respectively equipped in heat supply network water inlet bypass line 503.
Further, the coagulation hydroenergy backwater bypass line 102 is equipped with electric adjustable valve 1, the heat supply network return water branch
Road pipeline 502 is equipped with electric adjustable valve 2 302.The extraction line 6 is equipped with electric adjustable valve 3 303.
Further, the heat exchangers for district heating is connect with extraction line 6, the heat exchangers for district heating water outlet and the heat supply network
Main pipeline 504 of intaking connects.
Working principle:
In non-heating period, gate valve 1 and gate valve 2 202, closing gate valve 3 203 and gate valve 4 204 are opened, that is, is closed
Heat supply network return water cooling system opens condensation water cooling system, at this point, condensed water is as cooling water, a part of condensed water is from condensation
Water backwater main pipeline 101 enters low-pressure heater water inlet and exchanges heat, and enters condensate system after condensed water heating；Another part is solidifying
It bears water and passes sequentially through coagulation hydroenergy backwater main pipeline 101 and coagulation hydroenergy backwater bypass line 102, and by before slag cooler water inlet
Enter the cooling bottom ash of slag cooler after cold 4 boosting of pulp water pump, while solidifying according to bed drain purge adjustment one 301 aperture de-regulation of electric adjustable valve
Flow is born water, deslagging temperature is made to drop to 150 DEG C, temperature increases after the condensed water absorption heat of bottom ash, from slag cooler water outlet
Low-pressure heater water outlet is returned to, into condensate system.
In Heating Period, closing gate valve 1 and gate valve 2 202 open gate valve 3 203 and gate valve 4 204, that is, close condensation
Water cooling system opens heat supply network return water cooling system, at this point, heat supply network return water, as cooling water, a part of heat supply network return water passes through heat
Net backwater main pipeline 501 enters the high temperature steam extraction heat exchange in heat exchangers for district heating, with heat exchangers for district heating, and heat supply network return water absorbs high temperature and takes out
Temperature increases after the heat of vapour, into heat supply network water inlet main pipeline 504；Another part heat supply network return water passes sequentially through heat supply network return water supervisor
Road 501 and heat supply network return water bypass line 502 equipped with gate valve 3 203 and electric adjustable valve 2 302, and by before slag cooler water inlet
4 boosting of cold pulp water pump after enter the cooling bottom ash of slag cooler, while the 2 302 aperture de-regulation of electric adjustable valve is adjusted according to bed drain purge
Heat supply network circling water flow rate, so that deslagging temperature drops to 150 DEG C and heat supply network return water temperature is increased to 95 DEG C, heat supply network return water goes out from slag cooler
The mouth of a river intakes bypass line 503 into heat supply network water inlet main pipeline 504 by the heat supply network equipped with gate valve 4 204, is directly used in heat supply.
Coagulation hydroenergy backwater bypass line 102, condensed water water inlet bypass line 103, heat supply network is separately mounted to by control to return
Gate valve 1, gate valve 2 202, gate valve 3 203 and gate valve four in water bypass line 502 and heat supply network water inlet bypass line 503
204, the free switching of two line cooling system of Heating Period and non-heating period may be implemented, it can be cold using heat supply network return water in Heating Period
But system uses condensation water cooling system in non-heating period.
Comparative example
Certain 150MW Properties of CFB equipment overview is as follows: boiler is the superelevation of Shanghai Furnace Factory Co., Ltd's production
Press resuperheat, single drum Natural Circulation, circulating fluidized bed boiler, boiler model SG-480/13.7-M569.Steam turbine is Shanghai
Super-pressure, resuperheat, twin-cylinder double flow, single shaft, a condensing turbine for steam turbine plant production, unit model N150-
13.24/535/535。
The unit later period is to carry out heat supply to city, heat supply transformation is carried out to steam turbine, in steam turbine mesolow communicating pipe
Steam extraction is punched, design steam extraction amount is 200t/h, and builds heat supply one at first stop, using the 0.9MPa from steam turbine building, 352 DEG C
Superheated steam is after vapor-water heat exchanger and water water- to-water heat exchanger are by high-temperature-hot-water of the heat supply network circulating water heating at 95/50 DEG C, condensation
Water returns to power plant thermal system by condensate pump.The return water that 50 DEG C of heat supply network enters water circulating pump through dirt separator, pressurizes laggard
Enter heat exchanger, after being heated to form 95 DEG C, is sent by hot water pipe net to each city secondary heat exchange station.
Bed drain purge of the every boiler of the unit under design coal is 9.2t/h, and checking the bed drain purge under coal is 17.2t/
H, there are two slag-drip openings for every boiler furnace respectively in the left and right sides of burner hearth, and boiler slag removal temperature is 1000 DEG C, the row of burner hearth
Slag is discharged by tapered valve through Residue extraction pipeline, and the internal diameter of scum pipe slag-drip opening is Ф 500mm.Two are installed respectively in each slag-drip opening
Platform water cold drum formula cold-slag slagging equipment, is equipped with altogether four rolling-cylinder type slag-coolers, and the cooling capacity of rolling-cylinder type slag-cooler has enough
Surplus guarantees under boiler at full capacity operating condition no matter periodically or continuously deslagging, can guarantee that deslagging temperature is less than 100 DEG C of < and energy
Long-term safety reliability service.The cooling water inflow < 60t/h of slag cooler, inflow temperature are 34.6-51.1 DEG C, and water source is power plant's condensation
Water, import hydraulic pressure are about 2.45MPa, and output water temperature is less than 90 DEG C, slag cooler water resistance 0.05MPa.
As shown in figure 3, the existing slag cooler UTILIZATION OF VESIDUAL HEAT IN scheme of 150MW recirculating fluidized bed thermal power plant unit is by slag cooler
Waste heat is recycled to condensate system (being hereafter referred to as scheme one), and specially slag cooler is in parallel with No.1 low-pressure heater, carrys out self-solidifying
The condensed water of backwater main pipeline 101 is born water before No.1 low-pressure heater, separates two-way, it is low to be directly entered No.1 for condensed water all the way
Press heater；Another way condensed water passes through the cold slag on coagulation hydroenergy backwater bypass line 102 and coagulation hydroenergy backwater bypass line 102
Water pump 4 enters slag cooler after boosting, which is intake bypass line after slag cooler absorbs deslagging heat by condensed water
103 return to the import of No.1 low-pressure heater, are equipped with electronic pitch 1, Ke Yigen in coagulation hydroenergy backwater bypass line 102
Cooling water flow is adjusted according to bed drain purge.
Embodiment
It is transformed using slag cooler afterheat utilizing system of the technical solution proposed by the present invention to scheme one, as side
Case two increases slag cooler cooling water source all the way as shown in figure 4, scheme two increases heat supply network return water cooling system all the way.Institute
It states heat supply network return water cooling system to be represented by dashed line, the condensation water cooling system is indicated by the solid line.Specifically from heat supply network return water master
Pipeline 501 draws cooling water of the heat supply network return water as slag cooler all the way, which passes through heat supply network return water bypass line
502, and enter the cooling bottom ash of slag cooler after 4 boosting of supercooling pulp water pump, and electric adjustable is installed in heat supply network return water bypass line
Valve 2 302 can adjust the flow of heat supply network return water, so that deslagging temperature drops to 100 DEG C and heat supply network return water according to unit bed drain purge
Temperature is increased to 95 DEG C, and the cooling water after heating enters heat supply network water inlet main pipeline 504 by heat supply network water inlet bypass line 503 and is used for
Heat supply.
Also, scheme two is in coagulation hydroenergy backwater bypass line 102, condensed water water inlet bypass line 103, heat supply network return water branch
Gate valve 1, gate valve 2 202, gate valve 3 203 and gate valve four are respectively equipped in pipeline 502 and heat supply network water inlet bypass line 503
204, realize the switching in Heating Period and non-heating period slag cooler cooling water source.Specifically, in non-heating period, gate valve one is opened
201 and gate valve 2 202, closing gate valve 3 203 and gate valve 4 204, i.e. closing heat supply network return water cooling system, it is cooling to open condensed water
System；In Heating Period, closing gate valve 1 and gate valve 2 202 open gate valve 3 203 and gate valve 4 204, i.e. closing condensed water
Cooling system opens heat supply network return water cooling system.Original system and its equipment is utilized in scheme two to greatest extent, only in periphery
Increase cooling water pipeline all the way, the simple small investment of system.
Using the method for equivalent heat drop, unit is calculated separately and has taken scheme one and side under design coal and check coal
Do work increment caused by 2 two kinds of UTILIZATION OF VESIDUAL HEAT IN schemes of case, and is converted into coal consumption for power generation, by equipment annual utilization hours 5000
Hour converts unit in the mark coal amount of heating period saving in 4 months, so that two schemes, which are calculated, gives unit bring annual earnings,
Specific calculated result is as shown in table 1.
The econmics comparison of table 1 scheme one and scheme two
As can be seen from the above table, under design coal, unit takes 12.11 ten thousand yuan of the income more than one than scheme of scheme two；?
It checks under coal, unit takes 20.7 ten thousand yuan of the income more than one than scheme of scheme two, and energy saving profit increases；Bed drain purge is bigger, unit
Take the energy saving profit of scheme two bigger.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (7)
1. a kind of recirculating fluidized bed thermal power plant unit slag cooler afterheat utilizing system, including condensation water cooling system and heat supply network return water it is cold
But system, which is characterized in that the heat supply network heating of the low-pressure heater and heat supply network return water cooling system of the condensation water cooling system
Device is in parallel with slag cooler, the low-pressure heater be parallel to slag cooler both ends coagulation hydroenergy backwater bypass line and condensed water into
Valve one and valve two are respectively equipped in water bypass line, the heat exchangers for district heating is parallel to the heat supply network return water branch at slag cooler both ends
Valve three and valve four are respectively equipped in road pipeline and heat supply network water inlet bypass line.
2. a kind of recirculating fluidized bed thermal power plant unit slag cooler afterheat utilizing system according to claim 1, which is characterized in that
The low-pressure heater water inlet is connect with coagulation hydroenergy backwater main pipeline, and the condensed water is parallel on coagulation hydroenergy backwater main pipeline
Return water bypass line, coagulation hydroenergy backwater bypass line are connect with slag cooler water inlet, slag cooler water outlet and the condensed water into
The connection of water bypass line, condensed water water inlet bypass line return to low-pressure heater water outlet.
3. a kind of recirculating fluidized bed thermal power plant unit slag cooler afterheat utilizing system according to claim 1, which is characterized in that
The heat exchangers for district heating water inlet is connect with heat supply network backwater main pipeline, and the heat supply network return water branch is parallel in heat supply network backwater main pipeline
Road pipeline, heat supply network return water bypass line are connect with slag cooler water inlet, and slag cooler water outlet passes through heat supply network water inlet bypass duct
Road is connect with heat supply network water inlet main pipeline.
4. a kind of recirculating fluidized bed thermal power plant unit slag cooler afterheat utilizing system according to claim 2 or 3, feature exist
In equipped with cold pulp water pump before the slag cooler water inlet.
5. a kind of recirculating fluidized bed thermal power plant unit slag cooler afterheat utilizing system according to claim 3, which is characterized in that
The heat exchangers for district heating is connect with extraction line, and the heat exchangers for district heating water outlet is connect with heat supply network water inlet main pipeline.
6. a kind of recirculating fluidized bed thermal power plant unit slag cooler afterheat utilizing system according to claim 5, which is characterized in that
The coagulation hydroenergy backwater bypass line is equipped with electric adjustable valve one, and the heat supply network return water bypass line is equipped with electric adjustable valve two,
The extraction line is equipped with electric adjustable valve three.
7. a kind of recirculating fluidized bed thermal power plant unit slag cooler afterheat utilizing system according to claim 1, which is characterized in that
The valve one, valve two, valve three and valve four are all made of gate valve.
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| CN201810701489.3A CN109028047A (en) | 2018-06-29 | 2018-06-29 | A kind of recirculating fluidized bed thermal power plant unit slag cooler afterheat utilizing system |
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| CN201810701489.3A CN109028047A (en) | 2018-06-29 | 2018-06-29 | A kind of recirculating fluidized bed thermal power plant unit slag cooler afterheat utilizing system |
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| CN201475979U (en) * | 2009-08-19 | 2010-05-19 | 赵永权 | Device for supplying heat through directly using the residual heat of smoke discharged from power plant |
| CN203036658U (en) * | 2012-12-10 | 2013-07-03 | 河北省电力勘测设计研究院 | Boiler flue gas waste heat multipurpose utilization system |
| CN203848266U (en) * | 2014-04-29 | 2014-09-24 | 中冶华天南京工程技术有限公司 | Recycling system for waste heat of flue gas of blast furnace gas boiler |
| CN206786696U (en) * | 2017-05-24 | 2017-12-22 | 中国能源建设集团湖南省电力设计院有限公司 | Thermal power plant Slag Cooler for Circulation Fluidized Bed Boiler cooling water system |
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Application publication date: 20181218 |