CN107120714B - A kind of whole yearization comprehensive utilization energy conserving system - Google Patents

A kind of whole yearization comprehensive utilization energy conserving system Download PDF

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Publication number
CN107120714B
CN107120714B CN201710352036.XA CN201710352036A CN107120714B CN 107120714 B CN107120714 B CN 107120714B CN 201710352036 A CN201710352036 A CN 201710352036A CN 107120714 B CN107120714 B CN 107120714B
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water
heat
pump
way valve
supply network
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CN107120714A (en
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王海超
端木琳
李祥立
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Dalian University of Technology
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Dalian University of Technology
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00Hot-water central heating systems
    • F24D3/18Hot-water central heating systems using heat pumps
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/80Semi-solid phase processes, i.e. by using slurries
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22DPREHEATING, 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
    • F22D11/00Feed-water supply not provided for in other main groups
    • F22D11/02Arrangements of feed-water pumps
    • F22D11/06Arrangements of feed-water pumps for returning condensate to boiler
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/02Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/04Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/06Arrangements of devices for treating smoke or fumes of coolers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2215/00Preventing emissions
    • F23J2215/20Sulfur; Compounds thereof
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12Hot water central heating systems using heat pumps
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/30Technologies for a more efficient combustion or heat usage

Abstract

The present invention provides a kind of thermal power plant boiler fume afterheats to comprehensively utilize energy conserving system for the whole yearization of central heating or heating boiler feed water, belongs to thermal power plant boiler flue gas waste heat recovery and utilizes technical field.The flue gas waste heat recovery of the flue gas waste heat recovery system is divided into two parts, the heat of the high-temperature water formed in recycling wet desulphurization tower by desulfurization slurry and flue gas direct contact heat transfer first, for the equipment used for absorption heat pump, high-order drive energy comes from extracted steam from turbine;Water after preliminary heating enters the air-water heat exchanger being set to before deduster, inside there is enough snake pipes, and water flows the fume afterheat for absorbing high temperature from pipeline, further heated.The utilization of waste heat is also classified into two parts, and Heating Season is mainly used for heating heat supply network return water, if coolant-temperature gage can reach heat supply network requirement at this time, is not required to enter heat exchangers for district heating, otherwise enters temperature needed for heat exchangers for district heating is heated to heat supply network.Non-heating season is then used to improve thermal power plant boiler feed temperature.

Description

A kind of whole yearization comprehensive utilization energy conserving system
Technical field
The present invention relates to thermal power plant boiler flue gas waste heat recoveries to be directly used in using field more particularly to fume afterheat The whole yearization of central heating or heating boiler feed water comprehensively utilizes energy conserving system.
Background technique
The fume afterheat of thermal power plant boiler is rarely used in recycling at present, and flue gas loses one and occupies most in boiler loss Big specific gravity, so if this waste heat can be recycled, Heating Season is used for central heating, and non-heating season is used for heating boiler feed water The whole yearization comprehensive utilization that will really realize remaining heat of flue gas from steam power plant improves the effect of steam power plant under the premise of seldom consumption coal Rate, to achieve energy-saving and emission reduction purposes.Wet desulphurization is widely used in steam power plant, if calcium method and magnesium processes are most common sides Method, their common ground are using desulfurizing tower desulfurization, and desulfurizing tower inside smoke and desulfurization slurry carry out directly contact and carry out caloic Exchange, on the one hand remove flue gas in sulphur and further dedusting, on the other hand by flue gas sensible heat and part latent heat exchange arrive In desulfurization slurry, so that flue gas exit temperature is greatly reduced, while the temperature of desulfurization slurry also would rise to 45 DEG C or so, so High temperature is ideal low order heat source for heat pump, is much better than other low level heat energies, therefore recycling that this partial heat has very much must It wants, in conjunction with the air-water heat exchanger of high-temperature flue gas side, it will improve boiler efficiency and steam power plant's efficiency, and reduce the row of pollutant It puts.
Summary of the invention
Technical solution of the present invention:
A kind of thermal power plant boiler fume afterheat is energy saving for the comprehensive utilization of the whole yearization of central heating or heating boiler feed water System, the comprehensive gradient utilization system of fume afterheat whole yearization for being divided into desulfurizing tower collecting-tank and oxidation pond one are catchmented with desulfurizing tower Comprehensive two kinds of the gradient utilization system of the fume afterheat whole yearization that pond and oxidation pond are provided separately;
The fume afterheat whole yearization of desulfurizing tower collecting-tank and oxidation pond one integrates gradient utilization system, including boiler 1, vapour Turbine 2, condensing plant 3, deoxygenation water tank 4, boiler blow-down water pump 5, condensate tank 6, low-pressure heater 7, high-pressure heater 8, desuperheat Pressure reducer 9, air-water heat exchanger 10, deduster 11, desulfurizing tower 12, chimney 13, absorption heat pump 14, desulfurization slurry circulating pump 15, Technique water pump 16, desulfurizing agent delivery pump 17, blower 18, desulfuration byproduct delivery pump 19, soot-blowing control device 28, collecting-tank 29 and oxygen Change pond 30;
In Heating Period, heat supply network return water enters absorption heat pump 14 by the 4th three-way valve 27, and heat supply network return water is absorption 50~65 DEG C are heated in heat pump 14 for the first time;It comes out and passes sequentially through from absorption heat pump 14 by the heat supply network return water heated for the first time Third three-way valve 25 and the second three-way valve 24 enter back into air-water heat exchanger 10 and realize reheating to 55~68 DEG C;From gas The reheating water body that water- to-water heat exchanger 10 comes out successively adds by low-pressure heater 7 and high pressure after the first three-way valve 22 Hot device 8, temperature needed for making water body be heated to current central heating realize that heat supply network supplies water with this;
In non-heating period, the process that heat supply network return water absorbs waste heat does not run, i.e., changes without absorption heat pump 14 and air water The reheating of hot device 10, without supplying water to heat supply network;The condensed moisture in condensing plant 3 is two parts at this time, and a part enters Deoxygenation water tank 4 carries out deoxygenation, and the water by deoxygenation is turned again in boiler 1 by boiler blow-down water pump 5 and used;Another part passes through Third three-way valve 25 enters absorption heat pump 14, and condensed water is passed sequentially through the after tentatively being heated in absorption heat pump 14 Four three-way valves 27 and the second three-way valve 24 enter back into air-water heat exchanger 10 and realize reheating;It is come out from air-water heat exchanger 10 Reheating condensed water after the first three-way valve 22, into deoxygenation water tank 4 carry out deoxygenation, pass through pot by the water of deoxygenation Furnace back water pump 5 is turned again in boiler 1 and is used;
The steam that boiler 1 generates is divided into two parts, and a part enters heat supply network high-pressure heater 8 by temperature-decreased pressure reducer 9, changes Enter condensate tank 6 after heat;Another part enters steam turbine 2, is divided into steam exhaust and steam extraction two parts again later, and steam exhaust enters cold Solidifying equipment 3, realizes condensation;Steam extraction is divided into two parts, and first part's steam extraction enters heat supply network low-pressure heater by the first valve 20 7, condensate tank 6 is entered after heat exchange, second part steam extraction enters absorption heat pump 14 as driving heat by the second valve 21 Source also enters condensate tank 6 later;
Desulfurization slurry in desulfurizing tower 12 enters absorption heat pump 14 by slurries pump 15, its heat is discharged into heat supply network and is returned After water, the desulfurization slurry for reducing temperature is again introduced into the spray system of desulfurizing tower 12, absorbs fume afterheat and carries out desulfurization, by This continuously generates high temperature desulfurizing slurries and turns again to absorption heat pump 14;
Desulfurizing tower 12 sets gradually technique water pump 16, desulfurizing agent delivery pump 17 and desulfuration byproduct delivery pump from top to bottom 19, for supplying water into desulfurizing tower 12, desulfurizing agent delivery pump 17 takes off technique water pump 16 for adding desulfurizing agent into desulfurizing tower 12 Byproduct in sulphur tower 12 is discharged from desulfuration byproduct delivery pump 19;Desulfurizing tower 12 is equipped with blower 18, accelerates desulfuration byproduct Precipitating;
The clean flue gas to cool down after desulfurization and caloic exchange in desulfurizing tower 12 enters in chimney 13;
Air-water heat exchanger 10 is set first in the flue of boiler 1, after the heat exchange of heat supply network return water, by 11 dedusting of deduster, It enters back into desulfurizing tower 12 and carries out desulfurization process;
Air-water heat exchanger 10 connects soot-blowing control device 28;
4th valve 26 is set between third three-way valve 25 and the 4th three-way valve 27, when absorption heat pump 14 carries out When maintenance, third three-way valve 25 and the 4th three-way valve 27 are closed, it is subsequent that heat supply network return water directly passes through the entrance of the 4th valve 26 Process;
Third valve 23 is set between the first three-way valve 22 and the second three-way valve 24, when air-water heat exchanger 10 carries out When maintenance, the first three-way valve 22 and the second three-way valve 24 are closed, it is subsequent that heat supply network return water directly passes through the entrance of third valve 23 Process.
The comprehensive gradient utilization system of the fume afterheat whole yearization that desulfurizing tower collecting-tank and oxidation pond are provided separately includes boiler 1, steam turbine 2, condensing plant 3, deoxygenation water tank 4, boiler blow-down water pump 5, condensate tank 6, low-pressure heater 7, high-pressure heater 8, Temperature-decreased pressure reducer 9, air-water heat exchanger 10, deduster 11, desulfurizing tower 12, chimney 13, absorption heat pump 14, desulfurization slurry circulation Pump 15, technique water pump 16, desulfurizing agent delivery pump 17, blower 18, desulfuration byproduct delivery pump 19, soot-blowing control device 28, collecting-tank 29 and oxidation pond 30;
In Heating Period, heat supply network return water enters absorption heat pump 14 by the 4th three-way valve 27, and heat supply network return water is absorption 50~65 DEG C are heated in heat pump 14 for the first time;It comes out and passes sequentially through from absorption heat pump 14 by the heat supply network return water heated for the first time Third three-way valve 25 and the second three-way valve 24 enter back into air-water heat exchanger 10 and realize reheating to 55~68 DEG C;From gas The reheating water body that water- to-water heat exchanger 10 comes out successively adds by low-pressure heater 7 and high pressure after the first three-way valve 22 Hot device 8, temperature needed for making water body be heated to current central heating realize that heat supply network supplies water with this;
In non-heating period, the process that heat supply network return water absorbs waste heat does not run, i.e., changes without absorption heat pump 14 and air water The reheating of hot device 10, without supplying water to heat supply network;The condensed moisture in condensing plant 3 is two parts at this time, and a part enters Deoxygenation water tank 4 carries out deoxygenation, and the water by deoxygenation is turned again in boiler 1 by boiler blow-down water pump 5 and used;Another part passes through Third three-way valve 25 enters absorption heat pump 14, and condensed water is passed sequentially through the after tentatively being heated in absorption heat pump 14 Four three-way valves 27 and the second three-way valve 24 enter back into air-water heat exchanger 10 and realize reheating;It is come out from air-water heat exchanger 10 Reheating condensed water after the first three-way valve 22, into deoxygenation water tank 4 carry out deoxygenation, pass through pot by the water of deoxygenation Furnace back water pump 5 is turned again in boiler 1 and is used;
The steam that boiler 1 generates is divided into two parts, and a part enters heat supply network high-pressure heater 8 by temperature-decreased pressure reducer 9, changes Enter condensate tank 6 after heat;Another part enters steam turbine 2, is divided into steam exhaust and steam extraction two parts again later, and steam exhaust enters cold Solidifying equipment 3, realizes condensation;Steam extraction is divided into two parts, and first part's steam extraction enters heat supply network low-pressure heater by the first valve 20 7, condensate tank 6 is entered after heat exchange, second part steam extraction enters absorption heat pump 14 as driving heat by the second valve 21 Source also enters condensate tank 6 later;
Desulfurization slurry in desulfurizing tower 12 enters collecting-tank 29, and the water outlet of collecting-tank 29 enters absorption type heat by slurries pump 15 Pump 14, after its heat is discharged into heat supply network return water, the water outlet for reducing temperature is again introduced into the spray system of desulfurizing tower 12;
Technique water pump 16 is set on desulfurizing tower 12, for supplying water into desulfurizing tower 12;
Desulfurizing agent delivery pump 17 is for adding desulfurizing agent into collecting-tank 29;
Blower 18 and desulfuration byproduct delivery pump 19 are arranged on oxidation pond 30, and the byproduct in collecting-tank 29 passes through oxidation It is discharged after 30 oxidation processes of pond through desulfuration byproduct delivery pump 19;Blower 18 accelerates desulfuration byproduct precipitating;
The clean flue gas to cool down after desulfurization and caloic exchange in desulfurizing tower 12 enters in chimney 13;
Air-water heat exchanger 10 is set first in the flue of boiler 1, after the heat exchange of heat supply network return water, by 11 dedusting of deduster, It enters back into desulfurizing tower 12 and carries out desulfurization process;
Air-water heat exchanger 10 connects soot-blowing control device 28;
4th valve 26 is set between third three-way valve 25 and the 4th three-way valve 27, when absorption heat pump 14 carries out When maintenance, third three-way valve 25 and the 4th three-way valve 27 are closed, it is subsequent that heat supply network return water directly passes through the entrance of the 4th valve 26 Process;
Third valve 23 is set between the first three-way valve 22 and the second three-way valve 24, when air-water heat exchanger 10 carries out When maintenance, the first three-way valve 22 and the second three-way valve 24 are closed, it is subsequent that heat supply network return water directly passes through the entrance of third valve 23 Process.
Beneficial effects of the present invention: system proposed by the present invention can carry out adequately whole yearization to remaining heat of flue gas from steam power plant Comprehensive cascade utilization, increases the heat capacity of steam power plant, effectively reduces the energy consumption of steam power plant, improve efficiency of energy utilization, The environment for reducing steam power plant influences.
Detailed description of the invention
Fig. 1 is the comprehensive gradient utilization system of fume afterheat whole yearization of desulfurizing tower collecting-tank and oxidation pond one.
Fig. 2 is the comprehensive gradient utilization system of fume afterheat whole yearization that desulfurizing tower collecting-tank and oxidation pond are provided separately.
In figure: 1 boiler;2 steam turbines;3 condensing plants;4 deoxygenation water tanks;5 boiler blow-down waters pump;6 condensate tanks;7 low pressure add Hot device;8 high-pressure heaters;9 temperature-decreased pressure reducers;10 air-water heat exchangers;11 dedusters;12 desulfurizing towers;13 chimneys;14 is absorption Heat pump;15 desulfurization slurry circulating pumps;16 technique water pumps;17 desulfurizing agent delivery pumps;18 blowers;19 desulfuration byproduct delivery pumps; 20,21,23,26 valve;22,24,25,27 three-way valve;28 soot-blowing control devices;29 collecting-tanks;30 oxidation ponds.
Specific embodiment
Below in conjunction with attached drawing and technical solution, a specific embodiment of the invention is further illustrated.
In system described in Fig. 1, in Heating Season, three-way valve (22), (24), (25) and (27) and heat supply network return water connection.Temperature Degree is ThHeat supply return water first flow through absorption heat pump (14), recycle desulfurizing tower (12) interior high-temperature water heat, temperature rise Δ T1, enter the high-temperature flue gas side air-water heat exchanger (10) before deduster by the heat supply network return water tentatively to heat up later, pass through suction The sensible heat for receiving high-temperature flue gas makes temperature rise Δ T2.If (Th+ΔT1+ΔT2) >=Tg, i.e. water temperature have reached the current heating stage Supply water temperature requirement, then close valve 20, central heating system heat is supplied by fume afterheat completely at this time.When outdoor gas Temperature drop is low, when fume afterheat amount is insufficient for heat demand, i.e. (Th+ΔT1+ΔT2) < Tg, then Open valve 20, starting are hot Net heater (7), further heats heat supply network return water, but heating amount only needs to meet temperature rise Tg- (Th+ΔT1+ΔT2), Therefore the steam extraction amount of heat exchangers for district heating can be greatly decreased.
In system described in Fig. 1, in non-heating season, if condensing water temperature is higher than desulfurization slurry temperature, triple valve (22), (24), (25) and (27) and condensed water connection.Condensed water first flows through absorption heat pump (14), recycles desulfurizing tower (12) interior high-temperature water Heat, enter the high-temperature flue gas side air-water heat exchanger (10) before deduster by the condensed water that tentatively heats up later, pass through The sensible heat for absorbing high-temperature flue gas makes temperature further up.Send oxygen-eliminating device back to later, due to boiler feedwater obtain it is additional Temperature rise, therefore required heat is reduced in boiler, improves the efficiency of boiler.
Since steam power plant's method of operation and parameter difference close valve if condensing water temperature is lower than desulfurization slurry temperature (21), using the heat of water in direct water water heat exchange mode Absorption Desulfurization;If the two temperature difference is few, valve is closed (21), valve (26) are opened, closes the connection of three-way valve (25) and (27) and heat pump, such condensed water will be directed into air water Heat exchanger (10) absorbs the heat of high-temperature flue gas, then returns to oxygen-eliminating device.

Claims (1)

1. a kind of thermal power plant boiler fume afterheat is for the whole yearization of central heating or heating boiler feed water comprehensive utilization energy conservation system System, for the comprehensive gradient utilization system of fume afterheat whole yearization that desulfurizing tower collecting-tank and oxidation pond are provided separately, feature exists In the comprehensive gradient utilization system of the fume afterheat whole yearization that the desulfurizing tower collecting-tank and oxidation pond are provided separately includes boiler (1), steam turbine (2), condensing plant (3), deoxygenation water tank (4), boiler blow-down water pump (5), condensate tank (6), low-pressure heater (7), high-pressure heater (8), temperature-decreased pressure reducer (9), air-water heat exchanger (10), deduster (11), desulfurizing tower (12), chimney (13), absorption heat pump (14), desulfurization slurry circulating pump (15), technique water pump (16), desulfurizing agent delivery pump (17), blower (18), desulfuration byproduct delivery pump (19), soot-blowing control device (28), collecting-tank (29) and oxidation pond (30);
In Heating Period, heat supply network return water enters absorption heat pump (14) by the 4th three-way valve (27), and heat supply network return water is absorption Heat pump is heated to 50~65 DEG C in (14) for the first time;It is come out successively by the heat supply network return water heated for the first time from absorption heat pump (14) By third three-way valve (25) and the second three-way valve (24), enter back into air-water heat exchanger (10) realize reheating to 55~ 68℃;The reheating water body come out from air-water heat exchanger (10) successively adds by low pressure after the first three-way valve (22) Hot device (7) and high-pressure heater (8), temperature needed for making water body be heated to current central heating realize that heat supply network supplies water with this;
In non-heating period, the process that heat supply network return water absorbs waste heat is not run, i.e., exchanges heat without absorption heat pump (14) and air water The reheating of device (10), without supplying water to heat supply network;At this time the condensed moisture in condensing plant (3) be two parts, a part into Enter deoxygenation water tank (4) and carry out deoxygenation, the water by deoxygenation is turned again in boiler (1) by boiler blow-down water pump (5) and used;It is another Part enters absorption heat pump (14) by third three-way valve (25), and condensed water is tentatively heated in absorption heat pump (14) The 4th three-way valve (27) is passed sequentially through later and the second three-way valve (24) enters back into air-water heat exchanger (10) and realizes secondary add Heat;The reheating condensed water come out from air-water heat exchanger (10) is after the first three-way valve (22), into deoxygenation water tank (4) Deoxygenation is carried out, the water by deoxygenation is turned again in boiler (1) by boiler blow-down water pump (5) and used;
The steam that boiler (1) generates is divided into two parts, and a part enters heat supply network high-pressure heater (8) by temperature-decreased pressure reducer (9), Enter condensate tank (6) after heat exchange;Another part enters steam turbine (2), is divided into steam exhaust and steam extraction two parts, steam exhaust again later Into condensing plant (3), condensation is realized;Steam extraction is divided into two parts, and first part's steam extraction enters heat supply network by the first valve (20) Low-pressure heater (7) enters condensate tank (6) after heat exchange, and second part steam extraction enters absorption by the second valve (21) Heat pump (14) is used as driving heat source, also enters condensate tank (6) later;
Desulfurization slurry in desulfurizing tower (12) enters collecting-tank (29), and collecting-tank (29) water outlet is entered by slurries pump (15) to be absorbed Formula heat pump (14), after its heat is discharged into heat supply network return water, the water outlet for reducing temperature is again introduced into the spray of desulfurizing tower (12) System;
Technique water pump (16) are set on desulfurizing tower (12), for supplying water into desulfurizing tower (12);
Desulfurizing agent delivery pump (17) is used to add desulfurizing agent into collecting-tank (29);
Blower (18) and desulfuration byproduct delivery pump (19) are arranged on oxidation pond (30), and the byproduct in collecting-tank (29) passes through It is discharged after oxidation pond (30) oxidation processes through desulfuration byproduct delivery pump (19);Blower (18) accelerates desulfuration byproduct precipitating;
The clean flue gas to cool down after desulfurization and caloic exchange in desulfurizing tower (12) enters in chimney (13);
Air-water heat exchanger (10) are set first in the flue of boiler (1), after the heat exchange of heat supply network return water, are removed by deduster (11) Dirt enters back into desulfurizing tower (12) and carries out desulfurization process;
Air-water heat exchanger (10) connects soot-blowing control device (28);
4th valve (26) is set between third three-way valve (25) and the 4th three-way valve (27), when absorption heat pump (14) When being overhauled, closes third three-way valve (25) and the 4th three-way valve (27), heat supply network return water directly pass through the 4th valve (26) enter follow-up process;
Third valve (23) is set between the first three-way valve (22) and the second three-way valve (24), when air-water heat exchanger (10) When being overhauled, closes the first three-way valve (22) and the second three-way valve (24), heat supply network return water directly pass through third valve (23) enter follow-up process.
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CN109945278A (en) * 2019-03-25 2019-06-28 大连理工大学 A kind of energy conserving system being used for central heating using absorption heat pump depth Mist heat recovering
CN109945277A (en) * 2019-03-25 2019-06-28 大连理工大学 A kind of energy conserving system being used for central heating using electric heat pump depth recycling remaining heat of flue gas from steam power plant
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