CN107062193A - A kind of system economized on water for coal-burning power plant's UTILIZATION OF VESIDUAL HEAT IN and desulfurization - Google Patents
A kind of system economized on water for coal-burning power plant's UTILIZATION OF VESIDUAL HEAT IN and desulfurization Download PDFInfo
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- CN107062193A CN107062193A CN201710390514.6A CN201710390514A CN107062193A CN 107062193 A CN107062193 A CN 107062193A CN 201710390514 A CN201710390514 A CN 201710390514A CN 107062193 A CN107062193 A CN 107062193A
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 230000023556 desulfurization Effects 0.000 title claims abstract description 34
- 239000002002 slurry Substances 0.000 claims abstract description 23
- 238000010521 absorption reaction Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 30
- 239000003546 flue gas Substances 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 16
- 239000007789 gas Substances 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- 238000003303 reheating Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 235000019504 cigarettes Nutrition 0.000 claims 1
- 230000006872 improvement Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- 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
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/36—Water and air preheating systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/14—Separation 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 by absorption
- B01D53/1456—Removing acid components
- B01D53/1481—Removing sulfur dioxide or sulfur trioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/14—Separation 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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of system economized on water for coal-burning power plant's UTILIZATION OF VESIDUAL HEAT IN and desulfurization, the system includes：Steam turbine, its inlet end is connected with boiler, and the weary gas output end of steam turbine is connected with condenser inlet end；First-class heat exchanger, it is in the slurry pool of absorption tower of desulfuration absorbing tower bottom；Secondary heat exchanger, it is located between desulfuration absorbing tower and deduster, and secondary heat exchanger liquid feeding end is connected with first-class heat exchanger outlet end, secondary heat exchanger outlet end is connected with the inlet duct of level V low-pressure heater, deduster outlet side is connected with secondary heat exchanger inlet end, and the outlet conduit of level V low-pressure heater is connected with boiler；Condensate pump, its liquid feeding end is connected with condenser outlet end, and condensate pump outlet end is connected with first-class heat exchanger；Air preheater, its inlet end is connected with boiler, and air preheater outlet side is connected with deduster inlet end.
Description
Technical field
The present invention relates to coal-burning power plant energy-saving and emission-reduction field, it is used for coal-burning power plant's UTILIZATION OF VESIDUAL HEAT IN in particular to one kind
The system economized on water with desulfurization.
Background technology
Coal-burning power plant enters the flue-gas temperature of desulfuration absorbing tower generally at 90 DEG C~more than 110 DEG C, containing a large amount of in flue gas
Waste heat.The higher flue gas of temperature enters slurry drops heat exchange relatively low with temperature after desulfuration absorbing tower, and slurries moisture largely evaporates simultaneously
Air is ultimately discharged into flue gas outflow absorption tower.Fume afterheat is not utilized effectively during this, and causes slurries big
Amount evaporation, wastes the water resource of preciousness.Under the overall background of energy-saving and emission-reduction, it is necessary to take measures to reduce boiler exhaust gas heat waste
Become estranged desulfurization water consume.
In utility model patent " a kind of new fluid-mixing heat-exchanger rig " (patent No. 201420021124.3), such as Fig. 2
It is shown, propose to install heat exchanger additional above absorption smoke inlet, heat cold water using flue gas and slurries, reach the mesh of UTILIZATION OF VESIDUAL HEAT IN
's.But flue gas causes the heat transfer effect of the device to be restricted into temperature decrease in the short time behind absorption tower.
The content of the invention
To solve the above problems, being used for coal-burning power plant's UTILIZATION OF VESIDUAL HEAT IN and desulfurization water saving it is an object of the invention to provide one kind
System, using flue gas and the heat condensate of slurries, reach raising boiler thermal output and damaged while reducing desulfurizing tower moisture
The effect of mistake.
The invention provides a kind of system economized on water for coal-burning power plant's UTILIZATION OF VESIDUAL HEAT IN and desulfurization, the system includes：
Steam turbine, its inlet end is connected with boiler, and the weary gas output end of the steam turbine is connected with condenser inlet end；
First-class heat exchanger, it is in the slurry pool of absorption tower of desulfuration absorbing tower bottom；
Secondary heat exchanger, its be located between the desulfuration absorbing tower and deduster, and the secondary heat exchanger liquid feeding end with
The inlet duct of the first-class heat exchanger outlet end connection, the secondary heat exchanger outlet end and the 8th grade of low-pressure heater connects
Connect, the deduster outlet side is connected with the secondary heat exchanger inlet end, the outlet conduit of the 8th grade of low-pressure heater
It is connected with the boiler；
Condensate pump, its liquid feeding end is connected with the condenser outlet end, the condensate pump outlet end and the one-level
Heat exchanger is connected；
Air preheater, its inlet end is connected with the boiler, and the air preheater outlet side is entered with the deduster
Gas end is connected.
As a further improvement on the present invention, the UTILIZATION OF VESIDUAL HEAT IN and the system of desulfurization water saving also include flow control valve,
Its one end is connected with the condensate pump, and the flow control valve other end is connected with the first-class heat exchanger liquid feeding end.
As a further improvement on the present invention, the UTILIZATION OF VESIDUAL HEAT IN and desulfurization water saving system also include generator, its with
The steam turbine rotary shaft connection.
As a further improvement on the present invention, the UTILIZATION OF VESIDUAL HEAT IN and the system of desulfurization water saving also include air-introduced machine, and it goes out
Wind end is connected with the desulfuration absorbing tower, and the air-introduced machine air intake is connected with the secondary heat exchanger outlet side.
As a further improvement on the present invention, the UTILIZATION OF VESIDUAL HEAT IN and the system of desulfurization water saving also add including level V low pressure
Hot device, the 6th grade of low-pressure heater, the 7th grade of low-pressure heater, the level V low-pressure heater, the 6th grade of low-pressure heater,
7th grade of low-pressure heater, the 8th grade of low-pressure heater are located between the condensate pump and the boiler, and the described 8th
Level low-pressure heater, the 7th grade of low-pressure heater, the 6th grade of low-pressure heater, level V low-pressure heater are sequentially connected.
As a further improvement on the present invention, the UTILIZATION OF VESIDUAL HEAT IN and the system of desulfurization water saving also include chimney, itself and institute
State the connection of desulfuration absorbing tower upper end.
As a further improvement on the present invention, the steam turbine is taken out provided with four pumping ends, and four of the steam turbine
Gas end adds with the level V low-pressure heater, the 6th grade of low-pressure heater, the 7th grade of low-pressure heater, the 8th grade of low pressure respectively
Hot device connection.
The UTILIZATION OF VESIDUAL HEAT IN and desulfurization water-saving method for the system economized on water present invention also offers a kind of UTILIZATION OF VESIDUAL HEAT IN and desulfurization, its
It is characterised by：
The vapor for the HTHP that boiler is produced enters steam turbine, and steam turbine, which is rotated, drives electrical power generators；
Meanwhile, the high-temperature flue gas air inlet preheater that boiler is produced enters dedusting in deduster after being preheated to air
It is changed into middle temperature flue gas；
The weary gas of steam turbine condenses to form condensate into condenser, and condensate passes through condensate pump；
A part of condensate flows successively through the 8th grade of low-pressure heater, the 7th grade of low-pressure heater, the 6th grade of low-pressure heating
Device, level V low-pressure heater are simultaneously back to heating in boiler；
Another part condensate flows through flow control valve, is introduced into the slurries pair in first-class heat exchanger, slurry pool of absorption tower
Condensate in first-class heat exchanger is once heated；
The middle temperature flue gas that condensate after once heating enters in secondary heat exchanger, deduster is in secondary heat exchanger
Condensate carry out reheating；
The entrance that the condensate after heating twice returns to level V low-pressure heater is eventually passed, is added by level V low pressure
Hot device, which enters in boiler, to be heated.
Beneficial effects of the present invention are：The present invention realizes condensate two-step heating, and flue gas and desulfurization slurry UTILIZATION OF VESIDUAL HEAT IN are more
Fully, and by setting flow control valve, the flow for the condensate for participating in two-step heating can be adjusted according to boiler load, beneficial to excellent
Change unit operation.In addition, first-class heat exchanger is within desulfuration absorbing tower slurry pool, rather than the flow of flue gas on slurry pool
Space, heat exchange efficiency is higher, and will not increase smoke flow resistance.Also, flue gas flows through volume flow after secondary heat exchanger cooling
Amount reduces, and the air-introduced machine power consumption in downstream will be reduced accordingly.
Brief description of the drawings
Fig. 1 is a kind of system economized on water in coal-burning power plant's UTILIZATION OF VESIDUAL HEAT IN and desulfurization described in the embodiment of the present invention；
Fig. 2 is a kind of knot of utility model patent " new fluid-mixing heat-exchanger rig " (patent No. 201420021124.3)
Structure schematic diagram.
In figure,
1st, boiler；2nd, steam turbine；3rd, generator；4th, condenser；5th, condensate pump；6th, desulfuration absorbing tower；6-1, absorption tower
Slurry pool；7th, air preheater；8th, deduster；9th, air-introduced machine；10th, flow control valve；11st, first-class heat exchanger；12nd, secondary heat exchange
Device；13rd, level V low-pressure heater；14th, the 6th grade of low-pressure heater；15th, the 7th grade of low-pressure heater；16th, the 8th grade of low pressure
Heater；17th, chimney.
Embodiment
The present invention is described in further detail below by specific embodiment and with reference to accompanying drawing.
Embodiment 1, as shown in figure 1, described in first embodiment of the invention be it is a kind of be used for coal-burning power plant's UTILIZATION OF VESIDUAL HEAT IN and
The system of desulfurization water saving, the system includes：
Steam turbine 2, its inlet end is connected with boiler 1, and the weary gas output end of steam turbine 2 is connected with the inlet end of condenser 4, pot
The high-temperature high-pressure steam that stove 1 is produced is through entering in steam turbine 2, and high-temperature high-pressure steam completes energy conversion by steam turbine 2
Afterwards, last weary gas carries out cooling condensation into condenser 4 and is converted into condensate.
First-class heat exchanger 11, it utilizes absorption tower slurries in the slurry pool of absorption tower 6-1 of the bottom of desulfuration absorbing tower 6
The temperature of slurries is once heated to the condensate in first-class heat exchanger 11 in the 6-1 of pond.
Secondary heat exchanger 12, it is located between desulfuration absorbing tower 6 and deduster 8, and the liquid feeding end of secondary heat exchanger 12 and one
Level heat exchanger 11 outlet end connection, the outlet end of secondary heat exchanger 12 is connected with the inlet duct of level V low-pressure heater 13, removed
The outlet side of dirt device 8 is connected with the inlet end of secondary heat exchanger 12, and the outlet conduit of level V low-pressure heater 13 is connected with boiler 1.
The condensate for completing once to heat by first-class heat exchanger 11 enters in secondary heat exchanger 12, enters two grades using by deduster 8
The middle temperature flue gas of heat exchanger 12 carries out reheating to condensate, and the condensate after heating twice adds into level V low pressure
In hot device 13.
Condensate pump 5, its liquid feeding end is connected with the outlet end of condenser 4, and the outlet end of condensate pump 5 connects with first-class heat exchanger 11
Connect, the condensate in condenser 4 is pumped into first-class heat exchanger 11 and other condensation hot-water heating systems by condensate pump 5
Row heating.
Air preheater 7, its inlet end is connected with boiler 1, and the outlet side of air preheater 7 is connected with the inlet end of deduster 8,
High-temperature flue gas in the flue of boiler 1 is preheated to the air in air preheater 7, and the high-temperature flue gas after heat exchange enters deduster
Temperature slightly has reduction and is changed into middle temperature flue gas in 8, and last middle temperature flue gas enters secondary heat exchanger 12 and carries out reheating to condensate.
Further, the UTILIZATION OF VESIDUAL HEAT IN and the system of desulfurization water saving also include flow control valve 10, its one end and condensate
Pump 5 is connected, and the other end of flow control valve 10 is connected with the liquid feeding end of first-class heat exchanger 11.Flow control valve 10 is used for adjusting flowing through one
The flow of level heat exchanger 11.When the load of boiler 1 is relatively low, the condensate for flowing through first-class heat exchanger 11 by increase accounts for total condensate
The ratio of amount, can improve boiler feed temperature, be lowered into the flue-gas temperature of desulfuration absorbing tower, and then reach raising boiler hot
Efficiency, reduce desulfuration absorbing tower water consume direct effect, indirect effect be additionally included in boiler load it is relatively low when can properly increase
Into the flue-gas temperature of denitrating system, it is ensured that higher denitration efficiency.
Further, the UTILIZATION OF VESIDUAL HEAT IN and the system of desulfurization water saving also include generator 3, and it connects with the rotary shaft of steam turbine 2
Connect, the blade in high temperature and high pressure gas driving steam turbine 2 is rotated, blade drives generator 3 to be generated electricity by rotary shaft again.
Further, the UTILIZATION OF VESIDUAL HEAT IN and the system of desulfurization water saving also include air-introduced machine 9, its outlet air end and desulfuration absorbing tower
6 connections, the air intake of air-introduced machine 9 is connected with the outlet side of secondary heat exchanger 12, and air-introduced machine 9 sends into the flue gas in secondary heat exchanger 12
In absorption tower 6.
Further, the UTILIZATION OF VESIDUAL HEAT IN and the system of desulfurization water saving also include the 6th grade of low-pressure heater 14, it is the 7th grade low
Heater 15, the 8th grade of low-pressure heater 16 are pressed, three low-pressure heaters are with level V low-pressure heater 13 located at condensation
Between water pump 5 and boiler 1, and the 8th grade of low-pressure heater, the 7th grade of low-pressure heater, the 6th grade of low-pressure heater, level V
Low-pressure heater is sequentially connected.A part of condensate flows through the 8th grade of low-pressure heater, the 7th grade of low-pressure heater, the 6th successively
Level low-pressure heater, level V low-pressure heater, and stepped heating is carried out to it by four low-pressure heaters, finally through the 5th
It is back in boiler 1 and is heated after level low-pressure heater 13.
Further, the UTILIZATION OF VESIDUAL HEAT IN and the system of desulfurization water saving also include chimney 17, and it connects with the upper end of desulfuration absorbing tower 6
Connect, the flue gas in desulfuration absorbing tower 6 is discharged into air after desulfurization process by chimney 17.
Further, steam turbine 2 is provided with four pumping ends, and four of steam turbine 2 pumping ends respectively with level V low pressure
Heater 13, the 6th grade of low-pressure heater 14, the 7th grade of low-pressure heater 15, the 8th grade of low-pressure heater 16 are connected, steam turbine 2
From level V low-pressure heater 13, the 6th grade of low-pressure heater 14, the 7th grade of low-pressure heater 15, the 8th grade of low-pressure heater 16
Middle to realize pumping, the hot gas from four low-pressure heaters can be heated to boiler feedwater.
Embodiment 2, one kind described in second embodiment of the invention is used for coal-burning power plant's UTILIZATION OF VESIDUAL HEAT IN and desulfurization water-saving system
UTILIZATION OF VESIDUAL HEAT IN and desulfurization water-saving method be：
The vapor for the HTHP that boiler 1 is produced enters steam turbine 2, and steam turbine 2, which is rotated, drives generator 3 to generate electricity；
Meanwhile, the high-temperature flue gas air inlet preheater 7 that boiler 1 is produced enters in deduster 8 after being preheated to air
Dedusting is changed into middle temperature flue gas；
The weary gas of steam turbine enters the condensation of condenser 4 and forms condensate, and condensate passes through condensate pump 5；
A part of condensate flows successively through the 8th grade of low-pressure heater 16, the 7th grade of low-pressure heater 15, the 6th grade of low pressure
Heater 14, level V low-pressure heater 13 are simultaneously back to heating in boiler 1；
Another part condensate flows through flow control valve 10, is introduced into first-class heat exchanger 11, slurry pool of absorption tower 6-1
Slurries are once heated to the condensate in first-class heat exchanger 11；
The middle temperature flue gas that condensate after once heating enters in secondary heat exchanger 12, deduster 8 is to secondary heat exchange
Condensate in device 12 carries out reheating；
The entrance that the condensate after heating twice returns to level V low-pressure heater 13 is eventually passed, by level V low pressure
Heater 13, which enters in boiler 1, to be heated.
By taking typical more than 300,000 kilowatts coal-burning power plants as an example, about 30 DEG C of the condensing water temperature in the outlet of condenser 4 a, part is solidifying
Bear water and about 50 DEG C of slurry temperature in primary heater 11, desulfuration absorbing tower slurry pool 6-1 is entered by flow control valve 10, pass through
First-class heat exchanger, condensate is heated to 42 DEG C, afterwards into secondary heat exchanger 12, and (temperature is about for the flue gas exported with deduster 8
110 DEG C) exchange heat, condensate is heated to 85 DEG C, and flue gas is then cooled to 95 DEG C.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (8)
1. a kind of system economized on water for coal-burning power plant's UTILIZATION OF VESIDUAL HEAT IN and desulfurization, it is characterised in that including：
Steam turbine (2), its inlet end is connected with boiler (1), weary gas output end and condenser (4) air inlet of the steam turbine (2)
End connection；
First-class heat exchanger (11), it is in the slurry pool of absorption tower (6-1) of desulfuration absorbing tower (6) bottom；
Secondary heat exchanger (12), it is located between the desulfuration absorbing tower (6) and deduster (8), and the secondary heat exchanger
(12) liquid feeding end is connected with the first-class heat exchanger (11) outlet end, secondary heat exchanger (12) outlet end and level V low pressure
The inlet duct connection of heater (13), deduster (8) outlet side is connected with the secondary heat exchanger (12) inlet end, institute
The outlet conduit for stating level V low-pressure heater (13) is connected with the boiler (1)；
Condensate pump (5), its liquid feeding end is connected with the condenser (4) outlet end, condensate pump (5) outlet end with it is described
First-class heat exchanger (11) liquid feeding end is connected；
Air preheater (7), its inlet end is connected with the boiler (1), air preheater (7) outlet side and the dedusting
Device (8) inlet end is connected.
2. UTILIZATION OF VESIDUAL HEAT IN according to claim 1 and the system of desulfurization water saving, it is characterised in that the system also includes stream
Adjustable valve (10), its one end is connected with the condensate pump (5), and flow control valve (10) other end is changed with the one-level
Hot device (11) liquid feeding end connection.
3. UTILIZATION OF VESIDUAL HEAT IN according to claim 1 and the system of desulfurization water saving, it is characterised in that the system also includes hair
Motor (3), it is connected with the steam turbine (2) rotary shaft.
4. UTILIZATION OF VESIDUAL HEAT IN according to claim 1 and the system of desulfurization water saving, it is characterised in that the system also includes drawing
Blower fan (9), its outlet air end is connected with the desulfuration absorbing tower (6), air-introduced machine (9) air intake and the secondary heat exchanger
(12) outlet side is connected.
5. UTILIZATION OF VESIDUAL HEAT IN according to claim 1 and the system of desulfurization water saving, it is characterised in that the system also includes the
Six grades of low-pressure heaters (14), the 7th grade of low-pressure heater (15), the 8th grade of low-pressure heaters (16), the level V low pressure add
Hot device (13), the 6th grade of low-pressure heater (14), the 7th grade of low-pressure heater (15), the 8th grade of low-pressure heater (16) are located at
Between the condensate pump (5) and the boiler (1), and the 8th grade of low-pressure heater (16), the 7th grade of low-pressure heater
(15), the 6th grade of low-pressure heater (14), level V low-pressure heater (13) are sequentially connected.
6. UTILIZATION OF VESIDUAL HEAT IN according to claim 1 and the system of desulfurization water saving, it is characterised in that the system also includes cigarette
Chimney (17), it is connected with the desulfuration absorbing tower (6) upper end.
7. the system that UTILIZATION OF VESIDUAL HEAT IN and desulfurization are economized on water according to claim 1 or 5, it is characterised in that the steam turbine (2)
Provided with four pumping ends, and four of the steam turbine (2) pumping ends respectively with the 8th grade of low-pressure heater (16), the 7th
Level low-pressure heater (15), the 6th grade of low-pressure heater (14), level V low-pressure heater (13) connection.
8. a kind of UTILIZATION OF VESIDUAL HEAT IN of the system of UTILIZATION OF VESIDUAL HEAT IN and desulfurization water saving using as described in any one in claim 1-7
With desulfurization water-saving method, it is characterised in that：
The vapor for the HTHP that boiler (1) is produced enters steam turbine (2), and steam turbine (2), which is rotated, drives generator (3) hair
Electricity；
Meanwhile, the high-temperature flue gas air inlet preheater (7) that boiler (1) is produced enters deduster (8) after being preheated to air
Middle dedusting is changed into middle temperature flue gas；
The weary gas of steam turbine enters condenser (4) condensation and forms condensate, and condensate passes through condensate pump (5)；
A part of condensate flows successively through the 8th grade of low-pressure heater (16), the 7th grade of low-pressure heater (15), the 6th grade of low pressure
Heater (14), level V low-pressure heater (13) are simultaneously back to heating in boiler (1)；
Another part condensate flows through flow control valve (10), is introduced into first-class heat exchanger (11), slurry pool of absorption tower (6-1)
Slurries the condensate in first-class heat exchanger (11) is once heated；
The middle temperature flue gas that condensate after once heating enters in secondary heat exchanger (12), deduster (8) is to secondary heat exchange
Condensate in device (12) carries out reheating；
The entrance that the condensate after heating twice returns to level V low-pressure heater (13) is eventually passed, is added by level V low pressure
Hot device (13), which enters in boiler (1), heats.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710390514.6A CN107062193A (en) | 2017-05-27 | 2017-05-27 | A kind of system economized on water for coal-burning power plant's UTILIZATION OF VESIDUAL HEAT IN and desulfurization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710390514.6A CN107062193A (en) | 2017-05-27 | 2017-05-27 | A kind of system economized on water for coal-burning power plant's UTILIZATION OF VESIDUAL HEAT IN and desulfurization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107062193A true CN107062193A (en) | 2017-08-18 |
Family
ID=59615557
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710390514.6A Pending CN107062193A (en) | 2017-05-27 | 2017-05-27 | A kind of system economized on water for coal-burning power plant's UTILIZATION OF VESIDUAL HEAT IN and desulfurization |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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