CN110260674A - Air cooling system and control method for thermal power plant - Google Patents
Air cooling system and control method for thermal power plant Download PDFInfo
- Publication number
- CN110260674A CN110260674A CN201910512295.3A CN201910512295A CN110260674A CN 110260674 A CN110260674 A CN 110260674A CN 201910512295 A CN201910512295 A CN 201910512295A CN 110260674 A CN110260674 A CN 110260674A
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- heat exchange
- heat
- flue gas
- circulation pipe
- valve
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- 238000001816 cooling Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000003546 flue gas Substances 0.000 claims abstract description 120
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 118
- 239000007789 gas Substances 0.000 claims abstract description 67
- 238000009423 ventilation Methods 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 132
- 238000000605 extraction Methods 0.000 claims description 25
- 238000006477 desulfuration reaction Methods 0.000 claims description 24
- 238000012545 processing Methods 0.000 claims description 18
- 238000004064 recycling Methods 0.000 claims description 18
- 239000000779 smoke Substances 0.000 claims description 18
- 239000003517 fume Substances 0.000 claims description 12
- 239000002918 waste heat Substances 0.000 claims description 11
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 15
- 235000019504 cigarettes Nutrition 0.000 description 11
- 238000010586 diagram Methods 0.000 description 8
- 239000000428 dust Substances 0.000 description 8
- 238000010248 power generation Methods 0.000 description 8
- 238000005265 energy consumption Methods 0.000 description 5
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 239000003245 coal Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000284 extract Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000012717 electrostatic precipitator Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000003077 lignite Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 239000012716 precipitator Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910052815 sulfur oxide Inorganic materials 0.000 description 2
- 210000000038 chest Anatomy 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B11/00—Controlling arrangements with features specially adapted for condensers
Abstract
The invention discloses a kind of air cooling systems and control method for thermal power plant, and the air cooling system for thermal power plant includes: indirect cool tower, are equipped with the first air inlet and the first air outlet；It is externally provided with the first heat-exchanger rig including independently operated first, second heat exchange unit；Gas trap, the first heat exchange unit are connected to gas trap by first circulation pipe, and the second heat exchange unit is connected to gas trap by the second circulation pipe for being equipped with the first valve；Force ventilation indirect cool tower is provided with the second air inlet and the second air outlet, is provided with blower in the second air inlet or/and the second air outlet；The second heat-exchanger rig is provided with outside it；Flue gas temperature difference picotan is located in indirect cool tower, is connected to the second heat-exchanger rig by the third circulation pipe for being equipped with the second valve；It is connected to the second heat exchange unit by the 4th circulation pipe for being equipped with third valve.The present invention provides a kind of air cooling system and control method for thermal power plant, reduces noise pollution and electricity consumption.
Description
Technical field
The present invention relates to thermal power generating technology fields, cooling more particularly, to a kind of air for thermal power plant
System and control method.
Background technique
Thermal power generation unit is the important equipment in thermal power plant.Thermal power generation unit is with coal etc. for fuel, heating
Water in boiler is allowed to heat, then acts the unit to generate electricity with the Steam Actuation turbine of certain pressure.In operation process
In, thermal power generation unit consumes a large amount of water, in general, 600MW grades of units consume 120~150 tons of water per hour, for water resource
Deficient region, the development of thermal power generation unit will receive considerable restraint.
Certain power plant is in the region of water resources shortage, and using the biggish lignite of water content as fuel, since water provides
Source is deficient, in coal fired generation process, is of great significance to water resource recycling.Lignite moisture is big, generates after burning
Contain a large amount of moisture in flue gas, especially after wet desulphurization, the water content of the neat stress of 600MW grades of units is greater than per hour
200 tons, this part water is discharged into atmosphere by flue gas carrying, causes the waste to water resource；Therefore, using for thermal power generation
Aqueous in the air cooling system extraction neat stress of factory, though the temperature of neat stress side reduces by 5~10 DEG C, water lift amount be may be implemented
Desulfurization spot patch water, or even realize the spot patch water in power plant.In general, thermal power generation unit and natural ventilation system are with the use of progress
Cooling, the air cooling system for thermal power plant is used cooperatively with mechanical air supply system to be cooled down, mechanical air supply system
Because using the equipment such as air blower, it is easy to produce noise, power consumption is high.
Therefore, it is necessary to a kind of air cooling systems and control method for thermal power plant, to solve the above problems.
Summary of the invention
In view of this, it is an object of the invention to propose a kind of air cooling system and controlling party for thermal power plant
Method, mechanical air supply system and natural air feed system are used in parallel, and by adjusting the runing time of mechanical air supply system, reduce year
Equal noise pollution reduces average annual electricity consumption, reduces energy consumption.
Based on a kind of above-mentioned purpose air cooling system for thermal power plant provided by the invention, comprising:
Indirect cool tower, the indirect cool tower are provided with the first air inlet and the first air outlet；The indirect cool tower is provided with outside and institute
The first opposite heat-exchanger rig of the first air inlet is stated, first heat-exchanger rig includes the first heat exchange unit independently controlled
With the second heat exchange unit；
Gas trap, first heat exchange unit are connected to the gas trap by first circulation pipe, and second heat exchange is single
First to be connected to the gas trap by second circulation pipe, the water inlet end of the second circulation pipe and water outlet are provided with the first valve
Door；
Force ventilation indirect cool tower, the force ventilation indirect cool tower are provided with the second air inlet and the second air outlet, and described
Blower is provided in two air inlets or/and second air outlet；It is provided with and described second outside the force ventilation indirect cool tower
The second opposite heat-exchanger rig of air inlet；
Flue gas temperature difference picotan, the flue gas temperature difference picotan are located in the indirect cool tower, and the flue gas temperature difference mentions
Water installations are connected to second heat-exchanger rig by third circulation pipe, and the water inlet end of the third circulation pipe and water outlet are all provided with
It is equipped with the second valve；The flue gas temperature difference picotan is connected to second heat exchange unit by the 4th circulation pipe, and described
The water inlet end of four circulation pipes and water outlet are provided with third valve.
Preferably, be provided at least one set of smoke processing system in the indirect cool tower, the smoke processing system include from
First air inlet is used to remove the desulfuration absorbing tower of oxysulfide, for recycling to what first air inlet was sequentially communicated
The flue gas temperature difference picotan, dust-extraction unit and the chimney of water；First air inlet is connected to boiler furnace；The pot
Equipment for denitrifying flue gas for removing denitrification is provided between furnace burner hearth and first air inlet and for recycling heat
The fume waste heat exchange device of amount.
Preferably, the flue gas temperature difference picotan includes the exhaust gases passes and medium channel that can mutually exchange heat, the cigarette
The inlet and outlet in gas channel is connected to the desulfuration absorbing tower and the dust-extraction unit respectively, the import of the medium channel and
Outlet is respectively communicated with the first tee pipe fitting and the second tee pipe fitting, an interface and the medium channel of the first tee pipe fitting
Inlet communication, other two interface of first tee pipe fitting respectively with the water outlet of the second circulation pipe and the third
The water outlet of circulation pipe is connected to；The outlet of one interface and the medium channel of second tee pipe fitting, described
Other two interface of two tee pipe fittings water inlet end with the water inlet end of the second circulation pipe and the third circulation pipe respectively
Connection.
Preferably, first heat-exchanger rig further include: support frame, support frame as described above divide along the circumferential direction of the indirect cool tower
Cloth and along the short transverse of the indirect cool tower extend, first heat exchange unit and second heat exchange unit pass through fixation
Part is connect with support frame as described above.
The present invention also provides a kind of control methods such as the above-mentioned air cooling system for thermal power plant, comprising:
(1) when environment temperature is greater than or equal to preset temperature, the first heat exchange unit, gas trap and indirect cool tower form the first heat
Measure exchange cycles；The first valve is opened, so that second circulation pipe is connected to, so as to the second heat exchange unit, the gas trap and described
Indirect cool tower forms the second heat exchange cycles；Open the second valve so that third circulation pipe be connected to, so as to the second heat-exchanger rig,
Flue gas temperature difference picotan and force ventilation indirect cool tower form third heat exchange cycles；Third valve is closed, so that the 4th follows
Endless tube is in close state；
(2) when environment temperature is less than preset temperature, the first heat exchange unit, gas trap and indirect cool tower form the exchange of the first heat
Circulation；First valve is closed, so that the second circulation pipe is in close state；Second valve is closed, so that institute
State the closing of third circulation canal；Open the third valve so that the 4th circulation pipe be connected to, so as to second heat exchange unit,
The flue gas temperature difference picotan and the indirect cool tower form the 4th heat exchange cycles.
Preferably, in step (1) further include: when first heat exchange unit, the gas trap and the indirect cool tower shape
When at the first heat exchange cycles, first valve is closed, so that second circulation pipe is closed.
Preferably, be provided at least one set of smoke processing system in the indirect cool tower, the smoke processing system include from
First air inlet is used to remove the desulfuration absorbing tower of oxysulfide, for recycling to what first air inlet was sequentially communicated
The flue gas temperature difference picotan, dust-extraction unit and the chimney of water；First air inlet is connected to boiler furnace；The pot
Equipment for denitrifying flue gas for removing denitrification is provided between furnace burner hearth and first air inlet and for recycling heat
The fume waste heat exchange device of amount；In step (1) and step (2), when flue gas temperature difference picotan starting, Boiler Furnace
The flue gas of thorax discharge successively passes through the equipment for denitrifying flue gas, fume waste heat exchange device, the desulfuration absorbing tower, described
Flue gas temperature difference picotan, the dust-extraction unit and the chimney, and the indirect cool tower is discharged to from first air outlet
It is external.
Preferably, the flue gas temperature difference picotan includes the exhaust gases passes and medium channel that can mutually exchange heat, the cigarette
The inlet and outlet in gas channel is connected to the desulfuration absorbing tower and the dust-extraction unit respectively, the import of the medium channel and
Outlet is respectively communicated with the first tee pipe fitting and the second tee pipe fitting, an interface and the medium channel of the first tee pipe fitting
Inlet communication, other two interface of first tee pipe fitting respectively with the water outlet of the second circulation pipe and the third
The water outlet of circulation pipe is connected to；The outlet of one interface and the medium channel of second tee pipe fitting, described
Other two interface of two tee pipe fittings water inlet end with the water inlet end of the second circulation pipe and the third circulation pipe respectively
Connection；When environment temperature is greater than or equal to preset temperature, both first tee pipe fitting and second tee pipe fitting and institute
The interface for stating the connection of second circulation pipe is closed, and both first tee pipe fitting and second tee pipe fitting and the third
The interface of circulation pipe connection is opened；When environment temperature is less than preset temperature, first tee pipe fitting and second tee tube
The interface that both parts are connected to the second circulation pipe is opened, and both first tee pipe fitting and second tee pipe fitting
The interface being connected to the third circulation pipe is closed.
Preferably, first heat-exchanger rig further include: support frame, before step (1) further include: by support frame as described above
Extend along the circumferentially distributed of the indirect cool tower and along the short transverse of the indirect cool tower, by first heat exchange unit and institute
It states the second heat exchange unit and passes through fixing piece and connect with support frame as described above.
Furthermore it is preferred that being used for the air cooling system in thermal power plant further include: sensor and control device, sensing
Device is for monitoring ambient temperature data and sending the control device to；First valve, second valve and described
Three valves are electrically connected with the control device；The control device receives ambient temperature data and compared with preset temperature, and
Corresponding actions are made according to comparison result；In step (1), the control device controls first valve opening, described the
Two valve openings and the third valve are closed；In step (2), the control device control first valve close,
Second valve is closed and the third valve opening.
From the above it can be seen that provided by the present invention for the air cooling system and controlling party in thermal power plant
Method has the advantage that the runing time first, by reducing force ventilation indirect cool tower, reduces blower compared with prior art
Use duration, reduce average annual noise pollution, reduce average annual long electricity consumption, reduce energy consumption.Second, being changed by independent control first
Hot cell and the second heat exchange unit, redistribute the heat-sinking capability of indirect cool tower, to expand the scope of application of indirect cool tower.
Especially, when force ventilation indirect cool tower needs repair and maintenance, heat dissipation is provided for flue gas temperature difference picotan by indirect cool tower, guarantees cigarette
Air Temperature Difference picotan continuous service.
Detailed description of the invention
By the way that embodiment is described with reference to the accompanying drawing, features described above of the invention and technological merit will become
More understands and be readily appreciated that.
Fig. 1 is the schematic diagram of the air cooling system for thermal power plant used in the specific embodiment of the invention.
Fig. 2 is the use state diagram of the air cooling system shown in FIG. 1 for thermal power plant.
Fig. 3 is another use state diagram of the air cooling system shown in FIG. 1 for thermal power plant.
Fig. 4 is the another use state diagram of the air cooling system shown in FIG. 1 for thermal power plant.
Wherein appended drawing reference:
1: indirect cool tower；2: the first heat exchange units；3: the second heat exchange units；
4: gas trap；5: blower；6: force ventilation indirect cool tower；
7: the second heat-exchanger rigs；8: flue gas temperature difference picotan；9: the first valves；
10: the second valves；11: third valve.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.Wherein identical components are presented with like reference characters.It needs to illustrate
It is that word "front", "rear" used in the following description, "left", "right", "up" and "down" refer to the direction in attached drawing.It uses
Word "inner" and "outside" refer respectively to the direction towards or away from geometric center of specific component.
Fig. 1 is the schematic diagram of the air cooling system for thermal power plant used in the specific embodiment of the invention.Such as
Shown in Fig. 1, air cooling system for thermal power plant: indirect cool tower 1, gas trap 4, force ventilation indirect cool tower 6 and flue gas temperature
Poor picotan 8.
Indirect cool tower 1 is provided with the first air inlet and the first air outlet；In general, the first air inlet and the first air outlet are set respectively
It sets in the lower part and top of indirect cool tower 1；It is provided with first heat-exchanger rig opposite with the first air inlet outside indirect cool tower 1, first changes
Thermal includes the first heat exchange unit 2 and the second heat exchange unit 3 independently controlled；
First heat exchange unit 2 is connected to gas trap 4 by first circulation pipe, and the second heat exchange unit 3 and gas trap 4 pass through the
The connection of two circulation pipes, the water inlet end of second circulation pipe and water outlet are provided with the first valve 9；
Force ventilation indirect cool tower 6 is provided with the second air inlet and the second air outlet, in general, the second air inlet and the second outlet air
Mouth is separately positioned on the lower part and top of force ventilation indirect cool tower 6；Blower is provided in second air inlet or/and the second air outlet
5；Second heat-exchanger rig 7 opposite with the second air inlet is provided with outside force ventilation indirect cool tower 6；
Flue gas temperature difference picotan 8 is located in indirect cool tower 1, and flue gas temperature difference picotan 8 and the second heat-exchanger rig 7 pass through the
The connection of three circulation pipes, the water inlet end of third circulation pipe and water outlet are provided with the second valve 9；Flue gas temperature difference picotan 8 with
Second heat exchange unit 3 is connected to by the 4th circulation pipe, and the water inlet end of the 4th circulation pipe and water outlet are provided with third valve 11.
The water outlet (cold water) of high-temperature steam and the first heat-exchanger rig in condenser 4 after steam turbine workmanship exchanges heat, high
Warm steam loses heat and condenses into water recycling, and the water outlet of the first heat-exchanger rig obtains heat and is changed into hot water, hot water again into
Enter in the first heat-exchanger rig；The water inlet (hot water) of first heat-exchanger rig and the cold air of indirect cool tower 1 exchange heat, and cold air obtains
Heat is changed into hot-air and is discharged to outside indirect cool tower 1 in 1 inboard lift of indirect cool tower；The hot water of first heat-exchanger rig is after heat exchange
It loses heat and forms cold water, while being promoted again into gas trap 4 by circulating pump, into recycling next time.High-temperature flue gas and cigarette
The water inlet (cold water) that air Temperature Difference picotan 8 provides exchanges heat, and high-temperature flue gas loses heat and condenses into water recycling, because of cigarette
The water inlet of air Temperature Difference picotan 8 obtains heat, and the water outlet that flue gas temperature difference picotan 8 provides is hot water, is promoted by circulating pump
Into the second heat-exchanger rig 7；The hot water that cold water in second heat-exchanger rig 7 is provided with flue gas temperature difference picotan 8 exchanges heat,
The hot water of flue gas temperature difference picotan 8 loses heat and forms cold water, is again introduced into flue gas temperature difference picotan 8 and is followed next time
Ring；Cold water in second heat-exchanger rig 7 obtains heat and forms hot water, and exchanges heat with the cold air of force ventilation indirect cool tower 6,
Cold air acquisition heat is changed into hot-air and is discharged to outside force ventilation indirect cool tower 6 in 6 inboard lift of force ventilation indirect cool tower；The
The hot water of two heat-exchanger rigs loses heat after heat exchange and forms cold water, to carry out next time with flue gas temperature difference picotan 8
Circulation.When normal use, the first heat-exchanger rig, gas trap 4 and indirect cool tower 1 form heat exchange cycles；Second heat-exchanger rig 7,
Flue gas temperature difference picotan 8 and force ventilation indirect cool tower 6 form heat exchange cycles；The two is independently run, and is independent of each other.
When the outside ambient temperature is low, indirect cool tower 1 is after meeting the heat exchange of gas trap 4 and needing, and there are also additional exchange capability of heat, at this point,
Mechanical-draft cooling tower 6 and the second heat-exchanger rig 7 are closed, the heat exchange needs of gas trap 4 are met by the first heat exchange unit 2, i.e.,
First heat exchange unit 2, gas trap 3 and indirect cool tower 1 form heat exchange cycles；Meet the flue gas temperature difference by the second heat exchange unit 3
The heat exchange of picotan 8 needs, i.e. the second heat exchange unit 3, flue gas temperature difference picotan 8 and indirect cool tower 1 form heat exchange and follow
Ring.Using the above-mentioned air cooling system for thermal power plant, mechanical air supply system and natural air feed system are used in parallel, and
By adjusting the runing time of mechanical air supply system, average annual noise pollution is reduced, reduces average annual electricity consumption, reduces energy consumption.
Preferably, be provided at least one set of smoke processing system (not shown) in indirect cool tower 1, smoke processing system include from
What the first air inlet to the first air inlet was sequentially communicated is used to remove the desulfuration absorbing tower of oxysulfide, for the flue gas of recycle-water
Temperature difference picotan 8, dust-extraction unit and chimney；First air inlet is connected to boiler furnace (not shown)；Boiler furnace (does not show
The equipment for denitrifying flue gas for removing denitrification and the flue gas for recycling heat are provided between the first air inlet out)
Residual heat heat-exchanging device.Flue gas from boiler furnace pass sequentially through equipment for denitrifying flue gas, fume waste heat exchange device, the first air inlet,
Desulfuration absorbing tower, flue gas temperature difference picotan 8, dust-extraction unit, chimney and the first air outlet, wherein equipment for denitrifying flue gas is to cigarette
Nitrogen oxides in gas is handled；Fume waste heat exchange device can extract the heat in flue gas, recycling heat to medium into
Row heating；Desulfuration absorbing tower handles the oxysulfide in flue gas；Flue gas temperature difference picotan 8 extracts the water in flue gas
Point, recycle-water recycling；Dust-extraction unit handles the dust in flue gas；For chimney for discharging flue gas, indirect cool tower 1 makes cigarette
Gas is discharged into environment after being lifted to certain altitude；For the mating smoke processing system of indirect cool tower 1, make flue gas in boiler emission flue gas
After treatment, discharge index meets relevant laws and regulations requirement to pollutant.
In the present embodiment, two 660MW ultra supercritical fire coal air cooling turbo-generators share a circulating pump room, main vapour
Turbine and small steam turbine exhaust steam condensation use the indirect dry cooling tower of surface-type, and indirect dry cooling tower is arranged near circulating pump room.
Smoke processing system is interspersed in indirect dry cooling tower, and smoke dust discharge concentration is not more than 1mg/ after dust-extraction unit is handled
Nm3, dust-extraction unit includes but is not limited to electrostatic precipitator and wet electrical dust precipitator；Chimney cylinder diameter 8m, chimney steel cylinder top
Absolute altitude 100m；After desulfuration absorbing tower is handled, sulfur dioxide in flue gas concentration of emission is not more than 10mg/Nm3, de- by flue gas
After nitre device (such as SCR) processing, nitrogen oxides is (with NO2Meter) concentration of emission be not more than 20mg/Nm3；It is filled by flue gas temperature difference water lift
Set moisture in 8 extraction flue gases to recycle, realize that power plant's production water source is self-supporting, water lift while realize dust, NOx and
The collaboration of SOx removes effect, and thermal power generation unit emission is made to meet environmental protection standard.
Preferably, flue gas temperature difference picotan 8 includes the exhaust gases passes and medium channel that can mutually exchange heat, exhaust gases passes
Inlet and outlet is connected to desulfuration absorbing tower and dust-extraction unit respectively, and the inlet and outlet of medium channel is respectively communicated with the first threeway
Pipe fitting and the second tee pipe fitting, the inlet communication of an interface and medium channel of the first tee pipe fitting, the first tee pipe fitting
Other two interface is connected to the water outlet of the water outlet of second circulation pipe and third circulation pipe respectively；The one of second tee pipe fitting
The outlet of a interface and medium channel, other two interface of the second tee pipe fitting water inlet end with second circulation pipe respectively
It is connected to the water inlet end of third circulation pipe.The high-temperature flue gas that desulfuration absorbing tower provides enters exhaust gases passes, flue gas temperature difference water lift dress
The cold water for setting 8 influent sides enters medium channel, and exhaust gases passes exchange heat with medium channel, and the cigarette of heat is lost in exhaust gases passes
Gas is discharged in indirect cool tower 1, and the cold water that heat is obtained in medium channel forms hot water and arranges to the second heat-exchanger rig 7.Using
One tee pipe fitting and the second tee pipe fitting reduce the assembling difficulty between each circulation pipe, facilitate operation.
Preferably, the first heat-exchanger rig further include: support frame (not shown), support frame are circumferentially distributed along indirect cool tower 1
And extend along the short transverse of indirect cool tower 1, the first heat exchange unit 2 and the second heat exchange unit 3 pass through fixing piece and support frame 1
Connection.Support frame be used to support the first heat exchange unit 2 and the second heat exchange unit 3 along the circumferentially distributed of indirect cool tower 1 and along
The short transverse of cold tower 1 extends, by being stacked the first heat exchange unit 2 and the second heat exchange unit 3, to reduce by the first heat exchange
The occupied space of device avoids the radial width for increasing indirect cool tower 1, will not influence the ratio of height to diameter of indirect cool tower, guarantee the warp of cost
Ji property；Overlap come while sharing treating capacity using the first heat exchange unit 2 and the second heat exchange unit 3, avoid by flow and
The limitation of flow velocity is held in flow velocity and water collateral resistance inside 3 the two of the first heat exchange unit 2 and the second heat exchange unit suitable
In the range of, 1 cost economic of indirect cool tower is improved, the operating cost of the first heat-exchanger rig is reduced.
In the present embodiment, support frame is that the first heat exchange unit 2 of different layers and the second heat exchange unit 3 provide support and limit
Position effect, while making the first heat exchange unit 2 of same layer and the second heat exchange unit 3 can be along the circumferentially distributed fixation of air cooling tower 1；Branch
End cap is provided at the top of support, the gap between the salable indirect cool tower 1 of end cap and support frame avoids rainwater or sundries etc. from entering
In gap.
The use process of the air cooling system for thermal power plant is described further below.
When ambient temperature higher (normal use), the first heat-exchanger rig, gas trap 4 and indirect cool tower 1 form heat
Exchange cycles；Wherein, the first heat exchange unit, gas trap and indirect cool tower form the first heat exchange cycles；First valve 9 can basis
Actual needs opens or closes, and such as opens the first valve 9, so that second circulation pipe is connected to, so as to the second heat exchange unit 3, solidifying gas
Device 4 and indirect cool tower 1 form the second heat exchange cycles；The first valve is such as closed, so that second circulation pipe is in close state, only
There is the starting of the first heat exchange cycles.Second heat-exchanger rig 7, flue gas temperature difference picotan 8 and force ventilation indirect cool tower 6 form heat
Measure exchange cycles；Wherein, the second valve 10 is opened, so that third circulation pipe is connected to, so as to the second heat-exchanger rig 7, the flue gas temperature difference
Picotan 8 and force ventilation indirect cool tower 6 form third heat exchange cycles；Third valve 11 is closed, so that the 4th circulation pipe
It is in close state.
When the outside ambient temperature is low, indirect cool tower 1 is after meeting the heat exchange of gas trap 4 and needing, and there are also additional heat-energy transducers
Power meets the heat exchange of gas trap 4 by the first heat exchange unit 2 at this point, closing mechanical-draft cooling tower 6 and the second heat-exchanger rig 7
It needs, i.e. the first heat exchange unit 2, gas trap 3 and indirect cool tower 1 form the first heat exchange cycles；It is full by the second heat exchange unit 3
The heat exchange of sufficient flue gas temperature difference picotan 8 needs, that is, the first valve 9 is closed, so that second circulation pipe is in close state；It closes
Second valve 10, so that third circulation canal is closed；Third valve 11 is opened, so that the 4th circulation pipe is connected to, is changed so as to second
Hot cell 3, flue gas temperature difference picotan 8 and indirect cool tower 1 form the 4th heat exchange cycles.
Fig. 2 is the use state diagram of the air cooling system shown in FIG. 1 for thermal power plant.Fig. 3 is Fig. 1 institute
Another use state diagram of the air cooling system for thermal power plant shown.As shown in Figures 2 and 3, it is used for firepower
The air cooling system in power plant includes indirect cool tower 1, gas trap 4, force ventilation indirect cool tower 6 and flue gas temperature difference picotan 8.
The present invention also provides a kind of control methods such as the above-mentioned air cooling system for thermal power plant, comprising:
(1) when environment temperature is greater than or equal to preset temperature, the first heat exchange unit 2, gas trap 4 and indirect cool tower 1 form the
One heat exchange cycles；Open the first valve 9 so that second circulation pipe be connected to, so as to the second heat exchange unit 3, gas trap 4 and
Cold tower 1 forms the second heat exchange cycles；The second valve 10 is opened, so that third circulation pipe is connected to, so as to the second heat-exchanger rig
7, flue gas temperature difference picotan 8 and force ventilation indirect cool tower 6 form third heat exchange cycles；Third valve 11 is closed, so that
4th circulation pipe is in close state；
(2) when environment temperature is less than preset temperature, the first heat exchange unit 2, gas trap 4 and indirect cool tower 1 form the first heat
Exchange cycles；The first valve 9 is closed, so that second circulation pipe is in close state；The second valve 10 is closed, so that third recycles
Channel is closed；Third valve 11 is opened, so that the 4th circulation pipe is connected to, so as to the second heat exchange unit 3, flue gas temperature difference picotan
8 and indirect cool tower 1 formed the 4th heat exchange cycles.
The water outlet (cold water) of high-temperature steam and the first heat-exchanger rig in condenser 4 after steam turbine workmanship exchanges heat, high
Warm steam loses heat and condenses into water recycling, and the water outlet of the first heat-exchanger rig obtains heat and is changed into hot water, hot water again into
Enter in the first heat-exchanger rig；The water inlet (hot water) of first heat-exchanger rig and the cold air of indirect cool tower 1 exchange heat, and cold air obtains
Heat is changed into hot-air and is discharged to outside indirect cool tower 1 in 1 inboard lift of indirect cool tower；The hot water of first heat-exchanger rig is after heat exchange
It loses heat and forms cold water, while being promoted again into gas trap 4 by circulating pump, into recycling next time.High-temperature flue gas and cigarette
The water inlet (cold water) that air Temperature Difference picotan 8 provides exchanges heat, and high-temperature flue gas loses heat and condenses into water recycling, because of cigarette
The water inlet of air Temperature Difference picotan 8 obtains heat, and the water outlet that flue gas temperature difference picotan 8 provides is hot water, is promoted by circulating pump
Into the second heat-exchanger rig 7；The hot water that cold water in second heat-exchanger rig 7 is provided with flue gas temperature difference picotan 8 exchanges heat,
The hot water of flue gas temperature difference picotan 8 loses heat and forms cold water, is again introduced into flue gas temperature difference picotan 8 and is followed next time
Ring；Cold water in second heat-exchanger rig 7 obtains heat and forms hot water, and exchanges heat with the cold air of force ventilation indirect cool tower 6,
Cold air acquisition heat is changed into hot-air and is discharged to outside force ventilation indirect cool tower 6 in 6 inboard lift of force ventilation indirect cool tower；The
The hot water of two heat-exchanger rigs loses heat after heat exchange and forms cold water, to carry out next time with flue gas temperature difference picotan 8
Circulation.When the outside ambient temperature is low, indirect cool tower 1 is after meeting the heat exchange of gas trap 4 and needing, there are also additional exchange capability of heat,
At this point, closing mechanical-draft cooling tower 6 and the second heat-exchanger rig 7, the heat exchange need of gas trap 4 are met by the first heat exchange unit 2
It wants, i.e. the first heat exchange unit 2, gas trap 3 and indirect cool tower 1 form the first heat exchange cycles；Met by the second heat exchange unit 3
The heat exchange of flue gas temperature difference picotan 8 needs, that is, the first valve 9 is closed, so that second circulation pipe is in close state；Close the
Two valves 10, so that third circulation canal is closed；Third valve 11 is opened, so that the 4th circulation pipe is connected to, so as to the second heat exchange
Unit 3, flue gas temperature difference picotan 8 and indirect cool tower 1 form the 4th heat exchange cycles.When ambient temperature is higher (normal
Using) when, the first heat-exchanger rig, gas trap 4 and indirect cool tower 1 form heat exchange cycles；Wherein, the first heat exchange unit, solidifying gas
Device and indirect cool tower form the first heat exchange cycles；First valve 9 can open or close according to actual needs, such as open the first valve
Door 9 follows so that second circulation pipe is connected to so that the second heat exchange unit 3, gas trap 4 and indirect cool tower 1 form the exchange of the second heat
Ring；The first valve is such as closed, so that second circulation pipe is in close state, the starting of only the first heat exchange cycles.Second changes
Thermal 7, flue gas temperature difference picotan 8 and force ventilation indirect cool tower 6 form heat exchange cycles；Wherein, the second valve is opened
10, so that third circulation pipe is connected to, so as to 6 shape of the second heat-exchanger rig 7, flue gas temperature difference picotan 8 and force ventilation indirect cool tower
At third heat exchange cycles；Third valve 11 is closed, so that the 4th circulation pipe is in close state.Using above-mentioned control method
When operation is used for the air cooling system in thermal power plant, mechanical air supply system and natural air feed system are used in parallel, and pass through
The runing time for adjusting mechanical air supply system, reduces average annual noise pollution, reduces average annual electricity consumption, reduces energy consumption.
Fig. 4 is the another use state diagram of the air cooling system shown in FIG. 1 for thermal power plant.Such as Fig. 4
Shown, the first heat exchange unit 2 and the second heat exchange unit can control operation respectively.
Preferably, in step (1) further include: when the first heat exchange unit 2, gas trap 4 and indirect cool tower 1 form the first heat
When exchange cycles, the first valve 9 is closed, so that second circulation pipe is closed.Make when the first heat exchange unit 2 can satisfy gas trap 4
When with requiring, can the first valve of temporary close 9 so that 3 operation suspension of the second heat exchange unit.
Preferably, at least one set of smoke processing system is provided in indirect cool tower, smoke processing system includes from the first air inlet
Mouth is used to remove the desulfuration absorbing tower of oxysulfide, for the flue gas temperature difference water lift of recycle-water to what the first air inlet was sequentially communicated
Device 8, dust-extraction unit and chimney；First air inlet is connected to boiler furnace；It is arranged between boiler furnace and the first air inlet
There are the equipment for denitrifying flue gas for removing nitrogen oxides and the fume waste heat exchange device for recycling heat；In step (1)
In step (2), when the flue gas temperature difference picotan starting when, boiler furnace discharge flue gas successively pass through equipment for denitrifying flue gas,
Fume waste heat exchange device, desulfuration absorbing tower, flue gas temperature difference picotan, dust-extraction unit and chimney, and from the first air outlet
It is discharged to outside indirect cool tower.Flue gas passes sequentially through equipment for denitrifying flue gas, fume waste heat exchange device, the first air inlet from boiler furnace
Mouth, desulfuration absorbing tower, flue gas temperature difference picotan 8, dust-extraction unit, chimney and the first air outlet, wherein equipment for denitrifying flue gas pair
Nitrogen oxides in flue gas is handled；Fume waste heat exchange device can extract the heat in flue gas, recycle heat to medium
It is heated；Desulfuration absorbing tower handles the oxysulfide in flue gas；Flue gas temperature difference picotan 8 extracts the water in flue gas
Point, recycle-water recycling；Dust-extraction unit handles the dust in flue gas；For chimney for discharging flue gas, indirect cool tower 1 makes cigarette
Gas is discharged into environment after being lifted to certain altitude；For the mating smoke processing system of indirect cool tower 1, make flue gas in boiler emission flue gas
After treatment, discharge index meets relevant laws and regulations requirement to pollutant.
In the present embodiment, two 660MW ultra supercritical fire coal air cooling turbo-generators share a circulating pump room, main vapour
Turbine and small steam turbine exhaust steam condensation use the indirect dry cooling tower of surface-type, and indirect dry cooling tower is arranged near circulating pump room.
Smoke processing system is interspersed in indirect dry cooling tower, and smoke dust discharge concentration is not more than 1mg/ after dust-extraction unit is handled
Nm3, dust-extraction unit includes but is not limited to electrostatic precipitator and wet electrical dust precipitator；Chimney cylinder diameter 8m, chimney steel cylinder top
Absolute altitude 100m；After desulfuration absorbing tower is handled, sulfur dioxide in flue gas concentration of emission is not more than 10mg/Nm3, de- by flue gas
After nitre device (such as SCR) processing, nitrogen oxides is (with NO2Meter) concentration of emission be not more than 20mg/Nm3；It is filled by flue gas temperature difference water lift
Set moisture in 8 extraction flue gases to recycle, realize that power plant's production water source is self-supporting, water lift while realize dust, NOx and
The collaboration of SOx removes effect, and thermal power generation unit emission is made to meet environmental protection standard.
Preferably, flue gas temperature difference picotan 8 includes the exhaust gases passes and medium channel that can mutually exchange heat, exhaust gases passes
Inlet and outlet is connected to desulfuration absorbing tower and dust-extraction unit respectively, and the inlet and outlet of medium channel is respectively communicated with the first threeway
Pipe fitting and the second tee pipe fitting, the inlet communication of an interface and medium channel of the first tee pipe fitting, the first tee pipe fitting
Other two interface is connected to the water outlet of the water outlet of second circulation pipe and third circulation pipe respectively；The one of second tee pipe fitting
The outlet of a interface and medium channel, other two interface of the second tee pipe fitting water inlet end with second circulation pipe respectively
It is connected to the water inlet end of third circulation pipe；When environment temperature is greater than or equal to preset temperature, the first tee pipe fitting and the second threeway
The interface that both pipe fittings are connected to second circulation pipe is closed, and both the first tee pipe fitting and the second tee pipe fitting are recycled with third
The interface of pipe connection is opened；When environment temperature is less than preset temperature, both the first tee pipe fitting and the second tee pipe fitting and second
The interface of circulation pipe connection is opened, and the interface that both the first tee pipe fitting and the second tee pipe fitting are connected to third circulation pipe closes
It closes.The high-temperature flue gas that desulfuration absorbing tower provides enters exhaust gases passes, and the cold water of 8 influent side of flue gas temperature difference picotan enters medium
Channel, exhaust gases passes exchange heat with medium channel, and the flue gas that heat is lost in exhaust gases passes is discharged in indirect cool tower 1, medium
The cold water that heat is obtained in channel forms hot water and arranges to the second heat-exchanger rig 7.Using the first tee pipe fitting and the second tee tube
Part reduces the assembling difficulty between each circulation pipe, facilitates operation.
Preferably, the first heat-exchanger rig further include: support frame, before step (1) further include: by support frame along cold
Tower 1 circumferentially distributed and extend along the short transverse of indirect cool tower 1, the first heat exchange unit 2 and the second heat exchange unit 3 are passed through
Fixing piece is connect with support frame 1.Support frame is used to support the first heat exchange unit 2 and the second heat exchange unit 3 along the week of indirect cool tower 1
Extend to distribution and along the short transverse of indirect cool tower 1, by being stacked the first heat exchange unit 2 and the second heat exchange unit 3, with
Just the occupied space for reducing by the first heat-exchanger rig avoids the radial width for increasing indirect cool tower 1, will not influence the Gao Jing of indirect cool tower
Than guaranteeing the economy of cost；Treating capacity is overlapped come while sharing using the first heat exchange unit 2 and the second heat exchange unit 3,
The limitation by flow and flow rate is avoided, flow velocity and the resistance of water side inside 3 the two of the first heat exchange unit 2 and the second heat exchange unit are made
Power is held in suitable range, improves 1 cost economic of indirect cool tower, reduces the operating cost of the first heat-exchanger rig.
In the present embodiment, support frame is that the first heat exchange unit 2 of different layers and the second heat exchange unit 3 provide support and limit
Position effect, while making the first heat exchange unit 2 of same layer and the second heat exchange unit 3 can be along the circumferentially distributed fixation of air cooling tower 1；Branch
End cap is provided at the top of support, the gap between the salable indirect cool tower 1 of end cap and support frame avoids rainwater or sundries etc. from entering
In gap.
Furthermore it is preferred that being used for the air cooling system in thermal power plant further include: sensor and control device, sensing
Device is for monitoring ambient temperature data and sending control device to；First valve 9, the second valve 10 and third valve 11 with control
Device electrical connection processed；Control device receives ambient temperature data and makes accordingly compared with preset temperature, and according to comparison result
Movement；In step (1), control device controls the unlatching of the first valve 9, the second valve 10 is opened and third valve 11 is closed；
In step (2), control device controls the closing of the first valve 9, the second valve 10 is closed and third valve 11 is opened.By setting
Control device and sensor are set, it can be achieved that automatic operating, reduces working intensity.
From the description above with practice it is found that air cooling system and control provided by the present invention for thermal power plant
Method has the advantage that the runing time first, by reducing force ventilation indirect cool tower, reduces wind compared with prior art
The use duration of machine reduces average annual noise pollution, reduces average annual long electricity consumption, reduces energy consumption.Second, passing through independent control first
Heat exchange unit and the second heat exchange unit, redistribute the heat-sinking capability of indirect cool tower, to expand the applicable model of indirect cool tower
It encloses.Especially, when force ventilation indirect cool tower needs repair and maintenance, heat dissipation is provided for flue gas temperature difference picotan by indirect cool tower, is protected
Demonstrate,prove flue gas temperature difference picotan continuous service.
It should be understood by those ordinary skilled in the art that: the above is only a specific embodiment of the present invention, and
It is not used in the limitation present invention, all any modification, equivalent substitution, improvement and etc. within purport of the invention, done should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of air cooling system for thermal power plant characterized by comprising
Indirect cool tower, the indirect cool tower are provided with the first air inlet and the first air outlet；It is provided with outside the indirect cool tower and described the
The first opposite heat-exchanger rig of one air inlet, first heat-exchanger rig include the first heat exchange unit independently controlled and
Two heat exchange units；
Gas trap, first heat exchange unit are connected to the gas trap by first circulation pipe, second heat exchange unit with
The gas trap is connected to by second circulation pipe, and the water inlet end of the second circulation pipe and water outlet are provided with the first valve；
Force ventilation indirect cool tower, the force ventilation indirect cool tower are provided with the second air inlet and the second air outlet, described second into
Blower is provided in air port or/and second air outlet；It is provided with outside the force ventilation indirect cool tower and second air inlet
The second opposite heat-exchanger rig of mouth；
Flue gas temperature difference picotan, the flue gas temperature difference picotan are located in the indirect cool tower, the flue gas temperature difference water lift dress
It sets and is connected to second heat-exchanger rig by third circulation pipe, the water inlet end of the third circulation pipe and water outlet are provided with
Second valve；The flue gas temperature difference picotan is connected to second heat exchange unit by the 4th circulation pipe, and the described 4th follows
The water inlet end of endless tube and water outlet are provided with third valve.
2. the air cooling system according to claim 1 for thermal power plant, which is characterized in that in the indirect cool tower
It is provided at least one set of smoke processing system, the smoke processing system includes from first air inlet to first air inlet
Mouth be sequentially communicated for remove oxysulfide desulfuration absorbing tower, for recycle-water the flue gas temperature difference picotan, remove
Dirt device and chimney；First air inlet is connected to boiler furnace；Between the boiler furnace and first air inlet
It is provided with the equipment for denitrifying flue gas for removing denitrification and the fume waste heat exchange device for recycling heat.
3. the air cooling system according to claim 2 for thermal power plant, which is characterized in that the flue gas temperature difference
Picotan includes the exhaust gases passes and medium channel that can mutually exchange heat, the inlet and outlet of the exhaust gases passes respectively with it is described
Desulfuration absorbing tower is connected to the dust-extraction unit, and the inlet and outlet of the medium channel is respectively communicated with the first tee pipe fitting and
Two tee pipe fittings, the inlet communication of an interface and the medium channel of the first tee pipe fitting, first tee pipe fitting
Other two interface is connected to the water outlet of the water outlet of the second circulation pipe and the third circulation pipe respectively；Described second
The outlet of one interface and the medium channel of tee pipe fitting, other two interface difference of second tee pipe fitting
It is connected to the water inlet end of the water inlet end of the second circulation pipe and the third circulation pipe.
4. the air cooling system according to any one of claims 1 to 3 for thermal power plant, which is characterized in that institute
State the first heat-exchanger rig further include: support frame, support frame as described above is along the circumferentially distributed of the indirect cool tower and along cold between described
The short transverse of tower extends, and first heat exchange unit and second heat exchange unit pass through fixing piece and support frame as described above company
It connects.
5. a kind of control method of such as described in any item air cooling systems for thermal power plant of Claims 1-4,
It is characterized in that, comprising:
(1) when environment temperature is greater than or equal to preset temperature, the first heat exchange unit, gas trap and indirect cool tower form the first heat and hand over
Change circulation；Open the first valve so that second circulation pipe be connected to, so as to the second heat exchange unit, the gas trap and it is described between it is cold
Tower forms the second heat exchange cycles；The second valve is opened, so that third circulation pipe is connected to, so as to the second heat-exchanger rig, flue gas
Temperature difference picotan and force ventilation indirect cool tower form third heat exchange cycles；Third valve is closed, so that the 4th circulation pipe
It is in close state；
(2) when environment temperature is less than preset temperature, the first heat exchange unit, gas trap and indirect cool tower form the exchange of the first heat and follow
Ring；First valve is closed, so that the second circulation pipe is in close state；Second valve is closed, so that described
Third circulation canal is closed；The third valve is opened, so that the 4th circulation pipe is connected to, so as to second heat exchange unit, institute
It states flue gas temperature difference picotan and the indirect cool tower forms the 4th heat exchange cycles.
6. the control method of the air cooling system according to claim 5 for thermal power plant, which is characterized in that
In step (1) further include: when first heat exchange unit, the gas trap and the indirect cool tower form the first heat exchange cycles
When, first valve is closed, so that second circulation pipe is closed.
7. the control method of the air cooling system according to claim 5 or 6 for thermal power plant, feature exist
In being provided at least one set of smoke processing system in the indirect cool tower, the smoke processing system includes from first air inlet
Mouth is used to remove the desulfuration absorbing tower of oxysulfide, for the flue gas of recycle-water to what first air inlet was sequentially communicated
Temperature difference picotan, dust-extraction unit and chimney；First air inlet is connected to boiler furnace；The boiler furnace with it is described
The equipment for denitrifying flue gas for removing denitrification and the fume afterheat for recycling heat are provided between first air inlet
Heat-exchanger rig；In step (1) and step (2), when flue gas temperature difference picotan starting, the flue gas of boiler furnace discharge
Successively pass through the equipment for denitrifying flue gas, the fume waste heat exchange device, the desulfuration absorbing tower, the flue gas temperature difference water lift
Device, the dust-extraction unit and the chimney, and be discharged to outside the indirect cool tower from first air outlet.
8. the control method of the air cooling system according to claim 5 or 6 for thermal power plant, feature exist
In the flue gas temperature difference picotan includes the exhaust gases passes and medium channel that can mutually exchange heat, the import of the exhaust gases passes
It is connected to respectively with the desulfuration absorbing tower and the dust-extraction unit with outlet, the inlet and outlet of the medium channel is respectively communicated with
First tee pipe fitting and the second tee pipe fitting, the inlet communication of an interface and the medium channel of the first tee pipe fitting, institute
Other two interface of the first tee pipe fitting is stated to go out with the water outlet of the second circulation pipe and the third circulation pipe respectively
Water end (W.E.) connection；The outlet of one interface and the medium channel of second tee pipe fitting, second tee pipe fitting
Other two interface be connected to respectively with the water inlet end of the water inlet end of the second circulation pipe and the third circulation pipe；Work as environment
Temperature is greater than or equal to preset temperature, both first tee pipe fitting and second tee pipe fitting and the second circulation pipe
The interface of connection closes, and both first tee pipe fitting and second tee pipe fitting are connected to the third circulation pipe
Interface is opened；When environment temperature be less than preset temperature, both first tee pipe fitting and second tee pipe fitting with it is described
The interface of second circulation pipe connection is opened, and both first tee pipe fitting and second tee pipe fitting are followed with the third
The interface of endless tube connection is closed.
9. the control method of the air cooling system according to claim 5 or 6 for thermal power plant, feature exist
In first heat-exchanger rig further include: support frame, before step (1) further include: by support frame as described above along cold between described
Tower circumferentially distributed and extend along the short transverse of the indirect cool tower, will first heat exchange unit and second heat exchange singly
Member is connect by fixing piece with support frame as described above.
10. the control method of the air cooling system according to claim 5 or 6 for thermal power plant, feature exist
In air cooling system for thermal power plant further include: sensor and control device, sensor is for monitoring environment temperature
Data simultaneously send the control device to；First valve, second valve and the third valve with the control
Device electrical connection；The control device receives ambient temperature data and makes phase compared with preset temperature, and according to comparison result
It should act；In step (1), the control device controls first valve opening, second valve opening and described
Third valve is closed；In step (2), the control device control first valve close, second valve close with
And the third valve opening.
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Cited By (1)
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| CN113526165A (en) * | 2021-07-15 | 2021-10-22 | 神华北电胜利能源有限公司 | Coal pulverizer discharge system |
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