CN106352316A - Heat exchange system of dry and wet flue gas of power plant boiler and method thereof - Google Patents
Heat exchange system of dry and wet flue gas of power plant boiler and method thereof Download PDFInfo
- Publication number
- CN106352316A CN106352316A CN201610727454.8A CN201610727454A CN106352316A CN 106352316 A CN106352316 A CN 106352316A CN 201610727454 A CN201610727454 A CN 201610727454A CN 106352316 A CN106352316 A CN 106352316A
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- heat
- flue gas
- exhaust gases
- exchange
- gases passes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Water Supply & Treatment (AREA)
- Air Supply (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention provides a heat exchange system of dry and wet flue gas of power plant boiler and a method thereof. The system comprises a boiler purging system and a heat exchange system, wherein the boiler purging system comprises a boiler, a first flue gas channel, a first desulfurizer, a first electric bag deduster and a first induced draft fan connected along the first flue gas channel, the second flue gas channel and second desulfurizer, second electric bag deduster and second induced draft fan; the second heat exchange system comprises a dry flue gas heat exchanger, desulfurizer, wet flue gas heat exchanger, the third flue gas channel and heat pump, the a water circulating pipe is set among the dry flue gas heat exchanger, heat pump and the wet flue gas heat exchanger, the first flue gas channel and the second flue gas channel joins to connect the third flue gas channel; the third flue gas channel is connected with the chimney to the air.
Description
Technical field
The present invention relates to energy-conserving and environment-protective technical fiel, particularly to a kind of dry and wet mixed flue gas heat-exchange system of boiler of power plant
And heat-exchange method.
Background technology
With the fast development of various countries' economy, earth energy resource consumption, Global climate change, Acid Rain Pollution, water resource
Crisis, natural biology multiformity fall sharply and the pollution of persistent organism is more and more prominent.For the row reducing greenhouse gases
Put, environmental protection is very urgent.At present, senior sister apprentice can have based on structure one fossil energy, and fossil energy is in a long time still
It is the energy basis of human survival and development, the fossil energy such as its petrochina, natural gas and coal accounts for 85%, most of power train
System still depends on fossil energy, and coal is still the main fuel of power generation, and global demand amount is continuing to increase.
Under normal conditions, gas fired-boiler equipment can produce substantial amounts of high-temperature flue gas in the course of the work, at existing place
The flue gas of high temperature directly can be drained in reason mode, a large amount of heat energy in such high-temperature flue gas take in the air to and there is harmful gas
Body, to environment.Meanwhile, after boiler fired coal, most waste heat energy is discharged in environment, a large amount of damages to heat energy
Lose.Exhaust gas temperature is often higher than design temperature, and only by the low efficiency of boiler, the dust emission that also add cleaner unit is dense
Degree, causes huge pollution to environment.In recent years, due to energy shortage, with the development further of energy conservation, various new
The advanced boiler of type, energy-conservation is gradually improved.Burning is enhanced using advanced burner, reduces imperfect combustion.However, fall
Low exhaust gas heat loss becomes estranged the technology still slower development of Mist heat recovering.In order to improve the thermal efficiency of boiler further, reach
Energy-saving purpose, Mist heat recovering is also an important energy saving way.
In order to overcome defect present in above existing boiler flue gas treatment system, can be effectively right in the urgent need to one kind
The system that boiler smoke is reclaimed.
Therefore, the invention provides a kind of dry and wet mixed flue gas heat-exchange system of boiler of power plant and heat-exchange method, pass through
Rationally the arrangement to boiler smoke recovery system is it is achieved that to the waste heat efficient recovery in boiler emission flue gas, by recovery waste heat
Condensed water send boiler back to again, make water resource reuse.
Content of the invention
One aspect of the present invention is to provide a kind of dry and wet mixed flue gas heat-exchange system of boiler of power plant, described system bag
Include boiler exhaust gas system and heat-exchange system；
Described boiler exhaust gas system include boiler, the first exhaust gases passes, connect successively along described first exhaust gases passes
One desulfurizing tower, the first electrostatic fabric filter and the first air-introduced machine, the second exhaust gases passes and along described second exhaust gases passes phase successively
The second desulfurizing tower, the second electrostatic fabric filter and the second air-introduced machine connecing；
Described heat-exchange system include dry type flue gas heat-exchange unit, desulfurizing tower, Wet smoke heat exchanger, the 3rd exhaust gases passes and
Heat pump, is provided for the waterpipe of water circulation between described dry type flue gas heat-exchange unit, heat pump and described Wet smoke heat exchanger,
Described Wet smoke heat exchanger is provided with the outlet pipe connecting with fume gas condensation pond；Described dry type flue gas heat-exchange unit includes intaking
Mouth, the first outlet and the second outlet, described first outlet and the second outlet are sequentially communicated power plant heat by pipeline
Force system low-temperature heater, power plant therrmodynamic system middle temperature heater, power plant therrmodynamic system high temperature heater (HTH) and boiler, make wet
Condensate in formula flue gas heat-exchange unit returns to boiler after heating up；The described waterpipe for water circulation include the first water inlet pipe,
Two water inlet pipes, the first outlet pipe and the second outlet pipe；Described first water inlet pipe connects steam condensate charging pump, the first outlet pipe
Connect described Wet smoke heat exchanger with the second water inlet pipe, the second outlet pipe connects the water inlet of described dry type flue gas heat-exchange unit；
Described first exhaust gases passes are connected described 3rd exhaust gases passes with described second exhaust gases passes after converging；Described 3rd
Exhaust gases passes connect the chimney leading to air.
Preferably, described heat-exchange system be arranged in juxtaposition one or more groups of.
Preferably, described boiler exhaust gas system be arranged in juxtaposition one or more groups of.
Preferably, described heat pump be arranged in juxtaposition one or more groups of.
Preferably, the multigroup described heat-exchange system being arranged in juxtaposition, Wet smoke heat exchanger passes through outlet pipe and fume gas condensation
Pond connects.
Preferably, the multigroup described heat-exchange system being arranged in juxtaposition, multigroup 3rd exhaust gases passes mutually converge connection and lead to greatly
The chimney of gas.
Another aspect of the present invention provides a kind of heat-exchange method of the dry and wet smoke heat exchanging system of utilization boiler of power plant,
Methods described includes:
(1) flue gas of boiler of power plant discharge enters into described first exhaust gases passes and the second flue gas and leads to, and wherein flue gas is the
Desulfurization and dust removal process is sequentially passed through, flue gas sequentially passes through at desulfurization and dedusting in the second exhaust gases passes in one exhaust gases passes
Reason；
Flue gas in (2) first exhaust gases passes and the second exhaust gases passes meets at the 3rd exhaust gases passes, the flue gas after converging
Enter dry type flue gas heat-exchange unit by the 3rd exhaust gases passes；
(3) flue gas after the heat exchange of dry type flue gas heat-exchange unit enters desulfurizing tower by the 3rd exhaust gases passes to carry out desulfurization again laggard
Enter Wet smoke heat exchanger；
(4) temperature is that 40 DEG C of recirculated waters deliver to heat pump cooling by steam condensate charging pump, and described circulating water temperature is reduced to
Deliver to Wet smoke heat exchanger for 15 DEG C and heat exchange is carried out to flue gas；
(5) recirculated water after heat exchange in Wet smoke heat exchanger returns to and delivers to doing described in step (2) after heat pump heats up
In formula flue gas heat-exchange unit, flue gas heat exchange is processed, by power plant therrmodynamic system low-temperature heater, generating after described recirculated water heat exchange
Boiler is delivered in factory's therrmodynamic system middle temperature heater and the heating of power plant therrmodynamic system high temperature heater (HTH)；
Fume gas condensation pond is entered after water vapor condensation in flue gas in Wet smoke heat exchanger.
Preferably, the flue gas in Wet smoke heat exchanger is arranged to air from chimney after heat exchange.
A kind of dry and wet mixed flue gas heat-exchange system of boiler of power plant and heat-exchange method that the present invention provides, to boiler smoke
Recovery system reasonable Arrangement, fume afterheat boiler of power plant being produced by dry type flue gas heat-exchange unit and Wet smoke heat exchanger is many
Secondary heat exchange is it is achieved that to the waste heat efficient recovery in boiler emission flue gas, the condensed water of recovery waste heat being sent back to boiler again, making
Water resource reuses.
It should be appreciated that aforementioned description substantially and subsequently detailed description are exemplary illustration and explanation, should not
As the restriction to the claimed content of the present invention.
Brief description
With reference to the accompanying drawing enclosed, the more purpose of the present invention, function and advantage will be as follows by embodiment of the present invention
Description is illustrated, wherein:
Fig. 1 schematically shows the schematic diagram of the dry and wet mixed flue gas heat-exchange system of boiler of power plant of the present invention；
Fig. 2 shows the schematic diagram of one group of boiler exhaust gas system in one embodiment of the invention；
Fig. 3 shows the schematic diagram of heat-exchange system in one embodiment of the invention.
Specific embodiment
By reference to one exemplary embodiment, the purpose of the present invention and function and the side for realizing these purposes and function
Method will be illustrated.However, the present invention is not limited to one exemplary embodiment disclosed below；Can by multi-form Lai
It is realized.The essence of description is only to aid in the detail of the various equivalent modifications Integrated Understanding present invention.
Hereinafter, embodiments of the invention will be described with reference to the drawings.In the accompanying drawings, identical reference represent identical
Or similar part, or same or similar step.
The schematic diagram of the dry and wet mixed flue gas heat-exchange system of boiler of power plant of the present invention as shown in Figure 1, described dry and wet mixes cigarette
Gas heat-exchange system includes boiler exhaust gas system 100 and heat-exchange system 200 and the chimney 300 leading to air.The present embodiment boiler
Smoke evacuation system arrange two groups be used for power plant boilers, in some other embodiment boiler exhaust gas system 100 can arrange multigroup
Boiler for power plant.Two groups of boilers of the present embodiment are arranged in juxtaposition, and the cigarette that boiler produces enters into heat exchange system by exhaust gases passes
Carry out heat exchange in system 200, the waste heat in flue gas is reclaimed.Flue gas after heat-exchange system 200 recovery waste heat converge into
Enter and enter in air to chimney 300.Hereafter the boiler exhaust gas system 100 and heat-exchange system 200 of the present embodiment is illustrated.
The schematic diagram of one group of boiler exhaust gas system, shown boiler exhaust gas system in one embodiment of the invention as shown in Figure 2
Including boiler of power plant 101, the first exhaust gases passes 102, the first de- sulfur tower 103 that connects successively along described first flue gas 102 passage,
First electrostatic fabric filter 104 and the first air-introduced machine 105, the second exhaust gases passes 106 and along described second exhaust gases passes 106 successively
The second desulfurizing tower 107, the second electrostatic fabric filter 108 and the second air-introduced machine 109 connecting.First exhaust gases passes 102 exit and
Second exhaust gases passes 106 exit and the 3rd exhaust gases passes 110 are interconnected, and so that the first exhaust gases passes 102 and the second flue gas is led to
Flue gas in road 106 enters in the 3rd exhaust gases passes 110.Flue gas in 3rd exhaust gases passes 110 is through smoke heat exchanging system
Connect the chimney leading to air afterwards.
The schematic diagram of heat-exchange system in one embodiment of the invention as shown in Figure 3, heat-exchange system includes dry type flue gas heat exchange
Device 213, desulfurizing tower 201, Wet smoke heat exchanger 202, the 3rd exhaust gases passes 210 and heat pump 205.Preferably, the present embodiment
From three groups of heat pumps arranged side by side, in further embodiments, heat pump 205 can select to be arranged in juxtaposition multigroup.Dry type flue gas heat exchange
It is provided for the waterpipe of water circulation, Wet smoke heat exchange between device 213, heat pump 205 and described Wet smoke heat exchanger 202
Device 202 is provided with the outlet pipe 211 connecting with fume gas condensation pond 212.Described dry type flue gas heat-exchange unit include water inlet 214,
One outlet 215 and the second outlet 216, the first outlet 215 is connected power plant heating power with the second outlet 216 by pipeline
System hypothermia heater, the water after heat exchange sequentially passes through power plant therrmodynamic system low-temperature heater, the middle temperature of power plant therrmodynamic system
Send boiler after heater and power plant therrmodynamic system high temperature heater (HTH) again back to utilize.Waterpipe for water circulation includes first
Water inlet pipe 207, the second water inlet pipe 209, the first outlet pipe 208 and the second outlet pipe 206；Described first water inlet pipe 207 connects steaming
Vapour condensate charging pump, the first outlet pipe 208 and the second water inlet pipe 209 connect described Wet smoke heat exchanger 202, the second water outlet
Pipe connects the water inlet of dry type flue gas heat-exchange unit 213 described in 206.Dry type heat exchanger 213 first outlet 215 and the second outlet
216 connect power plant therrmodynamic system low-temperature heater by pipeline, and the water after heat exchange sequentially passes through power plant therrmodynamic system low temperature
Send boiler after heater, power plant therrmodynamic system middle temperature heater and power plant therrmodynamic system high temperature heater (HTH) again back to utilize.
Wet smoke heat exchanger 202 is provided with the water inlet 203 entering for recirculated water and outlet 204, meanwhile, Wet smoke
Heat exchanger 202 is provided with the outlet pipe 211 connecting with fume gas condensation pond 212, makes in flue gas after Wet smoke heat exchanger 202 heat exchange
Hydrogenesis tailing edge outlet pipe 211 enter fume gas condensation pond 212.It should be appreciated that in the present embodiment heat-exchange system is simultaneously
Two groups of row arrangement, in two groups of smoke heat exchanging systems being arranged in juxtaposition, passes through outlet pipe 211 phase between two groups of Wet smoke heat exchangers
Intercommunicated；It is interconnected by outlet conduit between two groups of dry type flue gas heat-exchange units.In further embodiments, can select simultaneously
Arrange multigroup heat-exchange system, be interconnected by outlet pipe between multigroup Wet smoke heat exchanger.
It should be noted that the present invention arranges multigroup boiler exhaust gas system and multigroup heat-exchange system in different embodiments, often
Described in one embodiment, the boiler exhaust gas system of arrangement should be corresponding with smoke heat exchanging system number.
The flue gas hereinafter specifically present invention being discharged for boiler of power plant to accompanying drawing 3 with reference to the present embodiment accompanying drawing 1
The process of heat exchange.
The schematic diagram of the dry and wet mixed flue gas heat-exchange system of boiler of power plant of the present invention as shown in Figure 1, boiler in the present embodiment
Smoke evacuation system 100 and heat-exchange system 200 all arrange two groups.In order to succinctly clearly illustrate.By one group of boiler exhaust gas system 100
With one group of heat-exchange system 200, the heat transfer process of boiler of power plant flue gas is illustrated.
The schematic diagram of one group of boiler exhaust gas system in one embodiment of the invention as shown in Figure 2, in boiler 101 burner hearth up to
150 DEG C of flue gas enters the first exhaust gases passes 102 and the second exhaust gases passes 106.The flue gas that boiler produces leads to through the first flue gas
Road 102, enters the first desulfurizing tower 103 and carries out desulfurization process to the sulfide in flue gas, the flue gas after desulfurization enters into the
One electrostatic fabric filter 104 carries out dust removal process to flue gas, and the flue gas through desulfurization and dedusting enters into the first air-introduced machine afterwards
105.The flue gas that boiler produces, through the second exhaust gases passes 106, enters the second desulfurizing tower 107 and the sulfide in flue gas is taken off
Sulphuring treatment, flue gas after desulfurization enters the second electrostatic fabric filter 108 and carries out dust removal process to flue gas, afterwards through desulfurization and
The flue gas of dedusting enters into the second air-introduced machine 109.It is preferable that the first exhaust gases passes and the second exhaust gases passes phase in the present embodiment
Mutually it is arranged in juxtaposition.Through the first air-introduced machine 105, the flue gas in first exhaust gases passes is incorporated in the 3rd exhaust gases passes 110, simultaneously
Flue gas in second exhaust gases passes is incorporated in the 3rd exhaust gases passes 110 second air-introduced machine 109.
Flue gas enters into heat-exchange system through the 3rd exhaust gases passes and carries out heat exchange to flue gas, the present invention as shown in Figure 3
The schematic diagram of heat-exchange system in embodiment, temperature is that 150 DEG C of flue gas enters dry type flue gas through the 3rd exhaust gases passes 210 (110)
Heat exchanger 213 carry out heat exchange after temperature drop to 60 DEG C, through dry type heat exchanger 213 heat exchange cooling after flue gas enter into desulfurization
Tower 201 carries out second desulfurization process, after desulfurization process flue-gas temperature be reduced to 56 DEG C enter Wet smoke heat exchangers 202 enter
Row heat exchange, after Wet smoke heat exchanger 202 heat exchange, temperature is reduced to 30 DEG C, enters chimney by the 3rd exhaust gases passes 210 and enters
Air.
Meanwhile, during above-mentioned fume emission, steam condensate charging pump passes through the first water inlet pipe of heat pump 205
207 offer temperature are 40 DEG C of recirculated water, and after heat pump 205, water temperature drop is flowed out to 15 DEG C by the first outlet pipe 208, through wet
The water inlet 203 of formula flue gas heat-exchange unit 202 enters in described Wet smoke heat exchanger 202 and carries out heat exchange to flue gas.Through heat exchange
Posterior circle coolant-temperature gage is increased to 28 DEG C and is flowed out by the outlet 204 of Wet smoke heat exchanger 202, the second water inlet through heat pump 205
Mouthfuls 209 enter heat pumps 205 after recirculated water is heated up, temperature is increased to 85 DEG C of recirculated water the second outlet pipe 206 by heat pump 205
Enter in dry type flue gas heat-exchange unit 213 through the water inlet 214 of dry type flue gas heat-exchange unit 213 and heat exchange is carried out to flue gas, after heat exchange
Circulating water temperature is increased to 140 DEG C and enters into power plant by dry type flue gas heat-exchange unit the first outlet 215 and the second outlet 216
Therrmodynamic system low-temperature heater, the water after heat exchange sequentially passes through power plant therrmodynamic system low-temperature heater, power plant therrmodynamic system
Send boiler after middle temperature heater and power plant therrmodynamic system high temperature heater (HTH) again back to utilize.The present embodiment is arranged in juxtaposition two groups and changes
Hot systems, are interconnected by outlet pipe 211 between two groups of Wet smoke heat exchangers, enter into after making the hydrogenesis in flue gas
Fume gas condensation pond 212；It is interconnected by outlet conduit between two groups of dry type flue gas heat-exchange units, after the heat exchange making, temperature is
140 DEG C of recirculated water enters power plant therrmodynamic system low-temperature heater by outlet conduit, and the recirculated water after heat exchange sequentially passes through to be sent out
After power plant thermal system low-temperature heater, power plant therrmodynamic system middle temperature heater and power plant therrmodynamic system high temperature heater (HTH) again
Secondary boiler of sending back to utilizes.Boiler smoke is reduced to 30 DEG C through smoke heat exchanging system temperature of the present invention, is entered by the 3rd exhaust gases passes 210
Enter chimney and enter air.
In other embodiments of the invention, during from multigroup smoke heat exchanging system, through dry type flue gas heat-exchange unit and wet type cigarette
After gas heat exchanger heat exchange, flue gas meets in an entrance chimney by the 3rd exhaust gases passes, dry type flue gas heat-exchange unit and wet type cigarette
Recirculated water is made to circulate between dry type heat exchanger and wet type heat exchanger by heat pump between gas heat exchanger, effectively to more than in flue gas
Heat is reclaimed.
A kind of dry and wet mixed flue gas heat-exchange system of boiler of power plant and heat-exchange method that the present invention provides, to boiler smoke
Recovery system reasonable Arrangement, fume afterheat boiler of power plant being produced by dry type flue gas heat-exchange unit and Wet smoke heat exchanger is many
Secondary heat exchange is it is achieved that to the waste heat efficient recovery in boiler emission flue gas, the condensed water of recovery waste heat being sent back to boiler again, making
Water resource reuses.
Explanation in conjunction with the present invention disclosing here and practice, the other embodiment of the present invention is for those skilled in the art
All will be readily apparent and understand.Illustrate and embodiment be to be considered only as exemplary, the true scope of the present invention and purport equal
It is defined in the claims.
Claims (8)
1. a kind of dry and wet mixed flue gas heat-exchange system of boiler of power plant is it is characterised in that described system includes boiler exhaust gas system
And smoke heat exchanging system；
Described boiler exhaust gas system includes boiler, the first exhaust gases passes, takes off along described first exhaust gases passes connect successively first
Sulfur tower, the first electrostatic fabric filter and the first air-introduced machine, the second exhaust gases passes and connect successively along described second exhaust gases passes
Second desulfurizing tower, the second electrostatic fabric filter and the second air-introduced machine；
Described heat-exchange system includes dry type flue gas heat-exchange unit, desulfurizing tower, Wet smoke heat exchanger, the 3rd exhaust gases passes and heat
Pump, is provided for the waterpipe of water circulation, institute between described dry type flue gas heat-exchange unit, heat pump and described Wet smoke heat exchanger
State Wet smoke heat exchanger and be provided with the outlet pipe connecting with fume gas condensation pond；Described dry type flue gas heat-exchange unit include water inlet,
First outlet and the second outlet, described first outlet and the second outlet are sequentially communicated power plant heating power system by pipeline
System low-temperature heater, power plant therrmodynamic system middle temperature heater, power plant therrmodynamic system high temperature heater (HTH) and boiler, make wet type cigarette
Condensate in gas heat exchanger returns to boiler after heating up；The described waterpipe for water circulation includes the first water inlet pipe, second enters
Water pipe, the first outlet pipe and the second outlet pipe；Described first water inlet pipe connects steam condensate charging pump, the first outlet pipe and the
Two water inlet pipes connect described Wet smoke heat exchanger, and the second outlet pipe connects the water inlet of described dry type flue gas heat-exchange unit；Described
First exhaust gases passes are connected described 3rd exhaust gases passes with described second exhaust gases passes after converging；Described 3rd exhaust gases passes connect
Lead to the chimney of air.
2. smoke heat exchanging system according to claim 1 is it is characterised in that described heat-exchange system is arranged in juxtaposition one group or many
Group.
3. smoke heat exchanging system according to claim 1 is it is characterised in that described boiler exhaust gas system is arranged in juxtaposition one group
Or it is multigroup.
4. smoke heat exchanging system according to claim 1 it is characterised in that described heat pump be arranged in juxtaposition one or more groups of.
5. smoke heat exchanging system according to claim 2 is it is characterised in that the multigroup described heat-exchange system that is arranged in juxtaposition,
Wet smoke heat exchanger is connected with fume gas condensation pond by outlet pipe.
6. smoke heat exchanging system according to claim 2 is it is characterised in that the multigroup described heat-exchange system that is arranged in juxtaposition,
Multigroup 3rd exhaust gases passes mutually converge and connect the chimney leading to air.
7. in a kind of utilization claim 1 to 6 smoke heat exchanging system described in any claim heat-exchange method, its feature exists
In methods described includes:
(1) flue gas of boiler of power plant discharge enters into described first exhaust gases passes and the second flue gas leads to, and wherein flue gas is in the first cigarette
Desulfurization and dust removal process is sequentially passed through, flue gas sequentially passes through desulfurization and dust removal process in the second exhaust gases passes in gas passage；
Flue gas in (2) first exhaust gases passes and the second exhaust gases passes meets at the 3rd exhaust gases passes, and the flue gas after converging is by
Three exhaust gases passes enter dry type flue gas heat-exchange unit；
(3) flue gas after the heat exchange of dry type flue gas heat-exchange unit by the 3rd exhaust gases passes enter desulfurizing tower carry out entering after desulfurization again wet
Formula flue gas heat-exchange unit；
(4) temperature is that 40 DEG C of recirculated waters deliver to heat pump cooling by steam condensate charging pump, and described circulating water temperature is reduced to 15 DEG C
Deliver to Wet smoke heat exchanger and heat exchange is carried out to flue gas；
(5) recirculated water after heat exchange in Wet smoke heat exchanger returns to after heat pump heats up and delivers to the dry type cigarette described in step (2)
In gas heat exchanger, flue gas heat exchange is processed, by power plant therrmodynamic system low-temperature heater, power plant heat after described recirculated water heat exchange
Boiler is delivered in Force system middle temperature heater and the heating of power plant therrmodynamic system high temperature heater (HTH)；
Fume gas condensation pond is entered after water vapor condensation in flue gas in Wet smoke heat exchanger.
8. heat-exchange method according to claim 7 is it is characterised in that the flue gas in Wet smoke heat exchanger is after heat exchange
Arranged to air from chimney.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610727454.8A CN106352316A (en) | 2016-08-25 | 2016-08-25 | Heat exchange system of dry and wet flue gas of power plant boiler and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610727454.8A CN106352316A (en) | 2016-08-25 | 2016-08-25 | Heat exchange system of dry and wet flue gas of power plant boiler and method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN106352316A true CN106352316A (en) | 2017-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610727454.8A Pending CN106352316A (en) | 2016-08-25 | 2016-08-25 | Heat exchange system of dry and wet flue gas of power plant boiler and method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101165399A (en) * | 2007-08-07 | 2008-04-23 | 江苏工业学院 | Boiler low grade residual heat combined reclamation method and device |
| JP4599139B2 (en) * | 2004-11-15 | 2010-12-15 | 三菱重工業株式会社 | Steam turbine plant |
| CN103968366A (en) * | 2014-05-04 | 2014-08-06 | 广州迪森热能技术股份有限公司 | Biomass boiler blow-down waste heat recycling system |
| CN105588108A (en) * | 2014-11-14 | 2016-05-18 | 西安子竹电子科技有限公司 | System for replenishing water to steam boiler by means of steam condensate |
| CN205897183U (en) * | 2016-08-18 | 2017-01-18 | 夏树威 | A do wet mixing exhaust gas heat exchanging system for power boiler |
-
2016
- 2016-08-25 CN CN201610727454.8A patent/CN106352316A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4599139B2 (en) * | 2004-11-15 | 2010-12-15 | 三菱重工業株式会社 | Steam turbine plant |
| CN101165399A (en) * | 2007-08-07 | 2008-04-23 | 江苏工业学院 | Boiler low grade residual heat combined reclamation method and device |
| CN103968366A (en) * | 2014-05-04 | 2014-08-06 | 广州迪森热能技术股份有限公司 | Biomass boiler blow-down waste heat recycling system |
| CN105588108A (en) * | 2014-11-14 | 2016-05-18 | 西安子竹电子科技有限公司 | System for replenishing water to steam boiler by means of steam condensate |
| CN205897183U (en) * | 2016-08-18 | 2017-01-18 | 夏树威 | A do wet mixing exhaust gas heat exchanging system for power boiler |
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Application publication date: 20170125 |
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| RJ01 | Rejection of invention patent application after publication |