CN106247371B - A comprehensive utilization device for flue gas waste heat in a thermal power plant - Google Patents
A comprehensive utilization device for flue gas waste heat in a thermal power plant Download PDFInfo
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- CN106247371B CN106247371B CN201610815429.5A CN201610815429A CN106247371B CN 106247371 B CN106247371 B CN 106247371B CN 201610815429 A CN201610815429 A CN 201610815429A CN 106247371 B CN106247371 B CN 106247371B
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- 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
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- 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
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
- F23J3/023—Cleaning furnace tubes; Cleaning flues or chimneys cleaning the fireside of watertubes in boilers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Supply (AREA)
- Chimneys And Flues (AREA)
Abstract
本发明提供一种火电厂烟气余热综合利用装置，其包括空气预热器、第一级换热器、冷凝水装置、吸收式制冷机、电除尘装置、第二级换热器、脱硫装置和烟囱；空气预热器、电除尘装置、脱硫装置和烟囱依次通过管路串联连接；在空气预热器和电除尘装置之间增设了第一级换热器，用于降低空气预热器排出的烟气温度，并将该高温的烟气与冷水交换后将加热的水输送至冷凝水装置和吸收式制冷机再次利用；第二级换热器将热能又输送至空气预热器得到二次利用，防止了能源浪费。本发明增加了第一级换热器和第二级换热器，可以降低排出烟气的温度，防止烟气对空气造成污染。
The invention provides a comprehensive utilization device for flue gas waste heat in a thermal power plant, which includes an air preheater, a first-stage heat exchanger, a condensation water device, an absorption refrigerator, an electric dust removal device, a second-stage heat exchanger, and a desulfurization device and the chimney; the air preheater, the electric precipitator, the desulfurization device and the chimney are connected in series through pipelines; a first-stage heat exchanger is added between the air preheater and the electric precipitator to reduce the air preheater The exhausted flue gas temperature, and the high-temperature flue gas is exchanged with cold water, and the heated water is sent to the condensing water device and the absorption refrigerator for reuse; the second-stage heat exchanger transfers the heat energy to the air preheater to obtain Secondary utilization prevents energy waste. The invention adds a first-stage heat exchanger and a second-stage heat exchanger, which can reduce the temperature of exhausted flue gas and prevent the flue gas from polluting the air.
Description
Technical field
The invention belongs to thermal power plant's technical fields, specifically, the present invention is more particularly directed to a kind of coal steam-electric plant smoke waste heat is comprehensive
It closes and utilizes device.
Background technique
Water is heated into water vapour, the pressure-driven vapour of water vapour using the thermal energy that fuel such as coal combustion generates by thermal power plant
Turbine acting is to produce electricl energy.
However during thermal power generation, fuel combustion release flue gas in containing dust, carbon dioxide, oxysulfide,
Flue gas direct emission is not only polluted atmosphere, brought to people's health by the harmful substances such as oxycarbide, mercury and mercuric compounds
Harm, it is also possible to which phenomena such as causing acid rain, photochemical fog, Ozone hole, greenhouse effects further threatens the ring of human survival
Border.Furthermore country puts forward new requirements requirement to energy conservation.It is increasingly urgent for improving boiler thermal efficiency.It wherein utilizes more than boiler exhaust gas
Heat is one of the most effective ways.Show the original design due to boiler according to related data and uses the variation of coal, general work
The thermal efficiency of industry boiler is about 60%~70%, its exhaust gas temperature is probably between 250~350 DEG C, and heat-conducting oil furnace, smoke evacuation
Temperature is even more to reach 280 DEG C or more, and a large amount of waste heats are not sufficiently sharp, greatly waste the energy.
By upper analysis, it is known that there are following characteristics and defect for thermal power plant's power generation process of the prior art:
1, the flue gas by the power generation release of existing thermal power plant is directly discharged in air, will lead to temperature raising, and to environment
It pollutes.
2, the flue gas of present thermal power plant's power generation release is directly discharged in air, and a large amount of waste heats is caused not obtain abundant benefit
With greatly wasting the energy.
Therefore the important channel that boiler smoke temperature has become boiler energy-saving is reduced.
Summary of the invention
The purpose of the present invention is to provide a kind of coal steam-electric plant smoke comprehensive waste-heat utilizing devices, at least to solve the prior art
Existing the problems such as polluting the environment, and further solve the problems such as waste of resource exists in the prior art.
To solve the above-mentioned problems, the present invention provides a kind of coal steam-electric plant smoke comprehensive waste-heat utilizing device, technical solution
It is as follows:
A kind of coal steam-electric plant smoke comprehensive waste-heat utilizing device, comprising: including air preheater, first order heat exchanger, condensation
Water installations, Absorption Refrigerator, electrical dust collector device, desulfurizer and chimney；Flue gas by the air preheater gas inlet
End enters in the air preheater, the first circuit of the smoke outlet of the air preheater and the first order heat exchanger
Input end is connected by pipeline；The input end at the first circuit outlet end and the electrical dust collector device of the first order heat exchanger
It is connected by pipeline；The outlet end of the electrical dust collector device is connected with the input end of the desulfurizer by pipeline；Institute
The outlet end for stating desulfurizer passes through pipeline connection to the chimney；The second servo loop outlet end of the first order heat exchanger and institute
The input end for stating condensate water device is connected by pipeline；The outlet end of the condensate water device and the first order heat exchanger
Second servo loop input end is connected by pipeline；The tertiary circuit outlet end of the first order heat exchanger and the absorption refrigeration
The input end of machine is connected by pipeline；The tertiary circuit of the outlet end of the Absorption Refrigerator and the first order heat exchanger
Input end is connected by pipeline.
Preferably, in the coal steam-electric plant smoke comprehensive waste-heat utilizing device, further includes: second level heat exchanger, described
The input end of secondary heat exchanger is connected with the outlet end of the electrical dust collector device by pipeline；The second level heat exchanger goes out
Mouth end is connected with the input end of the desulfurizer by pipeline.
Preferably, in the coal steam-electric plant smoke comprehensive waste-heat utilizing device, the second level heat exchanger is additionally provided with cold sky
Gas input end and hot air outlet end are additionally provided with hot-air on the air preheater and answer back end；The second level heat exchanger
Inlet of cold air end communicated with atmosphere；The hot air outlet end of the second level heat exchanger and the heat of the air preheater are empty
Gas answers back to hold to be connected by pipeline.
Preferably, in the coal steam-electric plant smoke comprehensive waste-heat utilizing device, first time with the first order heat exchanger
Input end connected exhaust gases passes air inlet section in road is gradual-enlargement type bell-mouth structure of air, is gone out with the first circuit of the first order heat exchanger
The connected exhaust gases passes air outlet section in mouth end is tapering type bell-mouth structure of air, makes the stream of the exhaust gases passes in the first order heat exchanger
Logical sectional area is constant.
Preferably, the input end in the coal steam-electric plant smoke comprehensive waste-heat utilizing device, with the second level heat exchanger
Connected exhaust gases passes air inlet section is gradual-enlargement type bell-mouth structure of air, and the flue gas being connected with the outlet end of the second level heat exchanger is logical
Road air outlet section is tapering type bell-mouth structure of air, keeps the flue gas actual internal area in the second level heat exchanger constant.
Preferably, in the coal steam-electric plant smoke comprehensive waste-heat utilizing device, further includes: supporting element, the supporting element are set
It sets between the exhaust gases passes air inlet section and first circuit inlet end, while the supporting element is additionally arranged at the flue gas
Between channel air outlet section and first circuit outlet end, for providing fixed support to the first order heat exchanger.
Preferably, in the coal steam-electric plant smoke comprehensive waste-heat utilizing device, further includes: wear strip, the wear strip peace
It is anti-wear for playing the role of at the windward side of the front end heat exchanger tube of the first order heat exchanger.
Preferably, in the coal steam-electric plant smoke comprehensive waste-heat utilizing device, further includes: two pressure dynamometers, one
The pressure dynamometer is mounted on the exhaust gases passes of first order heat exchanger front, does not enter the first order for measuring
The flue gas pressures of heat exchanger, another described pressure dynamometer are mounted on the exhaust gases passes at first order heat exchanger rear portion,
For measuring the flue gas pressures of the first order heat exchanger discharge；And shock wave soot blower, the shock wave soot blower are mounted on first
In grade heat exchanger, when the pressure difference between two pressure dynamometers is greater than 400Pa, starts the shock wave soot blower and carry out
Soot blowing processing.
Preferably, in the coal steam-electric plant smoke comprehensive waste-heat utilizing device, the shock wave soot blower be it is multiple, and it is described
The number of rows of heat exchanger tube is identical in first order heat exchanger, is separately mounted to the side of every row's heat exchanger tube of the first order heat exchanger,
For cigarette ash on row's heat exchanger tube to be blown off.
Preferably, in the coal steam-electric plant smoke comprehensive waste-heat utilizing device, the heat exchanger tube of the second level heat exchanger is
Glass tube or ceramic tube.
Analysis is it is found that compared with prior art, the present invention increases first order heat exchanger and second level heat exchanger first, drop
The temperature of low discharge flue gas, prevents flue gas from polluting to air.Furthermore the thermal energy of first order heat exchanger is used for cold by the present invention
Condensate device and Absorption Refrigerator make full use of the thermal energy in flue gas again, it is therefore prevented that energy waste.This hair
The bright thermal energy by second level heat exchanger returns again is delivered to air preheater, improves the secondary air temperature for entering air preheater, in this way
Conventional steam air heater can be reduced uses quantity of steam, enhances the combustion efficiency of boiler；Furthermore air preheater outlet end can be improved
Flue-gas temperature, be fume afterheat further using providing condition.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the preferred embodiment of the present invention.
Fig. 2 is the group of the first order heat exchanger of the preferred embodiment of the present invention, the first circuit inlet end, the first circuit outlet end
Assembling structure schematic diagram.
1- air preheater；11- gas inlet end；12- smoke outlet；13- hot gas is answered back end；The heat exchange of the 2- first order
Device；The first circuit inlet of 21- end；The first circuit outlet of 22- end；23- second servo loop outlet end；24- second servo loop input end；
25- tertiary circuit outlet end；26- tertiary circuit input end；27- exhaust gases passes air inlet section；28- exhaust gases passes air outlet section；3- is cold
Condensate device；31- input end；The outlet end 32-；4- Absorption Refrigerator；41- input end；The outlet end 42-；5- electrical dust collector device；
51- input end；The outlet end 52-；The second level 6- heat exchanger；61- input end；The outlet end 62-；63- inlet of cold air end；64- heat
Air outlet slit end；7- desulfurizer；71- input end；The outlet end 72-.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawings and detailed description.
As shown in Figure 1, the coal steam-electric plant smoke comprehensive waste-heat utilizing device of the preferred embodiment of the present invention mainly includes that air is pre-
Hot device 1, first order heat exchanger 2, condensate water device 3, Absorption Refrigerator 4, electrical dust collector device 5, desulfurizer 7 and chimney.
Air preheater 1 and first order heat exchanger 2 are heated using the heat of flue gas to respectively internal fluid is entered.
Air preheater 1, electrical dust collector device 5, desulfurizer 7 are sequentially connected in series, and first order heat exchanger 2 is arranged in air preheater
Between 1 and electrical dust collector device 5.
Specifically, gas inlet end 11, smoke outlet 12 are equipped on air preheater 1, in air preheater 8
The fluid of circulation is air, and flue gas enters through the gas inlet end 11 of air preheater 1, is discharged from smoke outlet 12, again
In the process, it exchanges heat with the air in air preheater 1, so that the air themperature in it increases, flue-gas temperature is reduced, temperature
High air is used as external application, and the flue gas after temperature reduces enters first order heat exchanger 2 and the first order by the first circuit inlet end 21
Fluid in heat exchanger 2 exchanges heat；
First order heat exchanger 2 is for flowing the flue gas waste heat recovery between air preheater 1 and electrical dust collector device 5 in it
Logical fluid carries out heat exchange, so that the heat of recycling and condensate water device 3, Absorption Refrigerator 4 are carried out heat exchange；Exist
Fluid in first order heat exchanger 2 is cold water, the outlet end 32 of condensate water device 3 and the second input end of first order heat exchanger 2
24 are connected by pipeline；The input end 31 of condensate water device 3 and the second outlet end 23 of first order heat exchanger 2 pass through pipeline phase
Connection；The outlet end 42 of Absorption Refrigerator 4 is connected with the third input end 26 of first order heat exchanger 2 by pipeline, is absorbed
The input end 41 of formula refrigeration machine 4 is connected with the third outlet end 25 of first order heat exchanger 2 by pipeline；First order heat exchanger 2
The flue gas heat of recycling is used to heat cold water in it, and by the cold water after heating by pipeline be divided into two-way be delivered to respectively it is cold
Condensate device 3 and Absorption Refrigerator 4；Condensed water in heating condensate water device 3 (i.e. power plant's heat regenerative system) is reduced with reaching
The pumping of power plant's backheat, reduces the effect of unit heat consumption rate；The hot working fluid water in Absorption Refrigerator 4 is heated, as absorption
The driving heat source of refrigeration machine 4, Absorption Refrigerator 4 export cooling capacity to supply all refrigeration dutys in power plant, including the building Ji Kong, trick
To institute, office building etc.；
First circuit outlet end 22 of first order heat exchanger 2 passes through pipe by the input end 51 of pipeline and electrical dust collector device 5
Road is connected, and the flue-gas temperature for finally making first order heat exchanger 2 be delivered to electrical dust collector device 5 is down to 110 DEG C or so；Enter in this way
The flue-gas temperature of electrical dust collector device 5 reduces, and can promote the dust removing effects of electrical dust collector device 5 while can effectively lower equipment electricity
Consumption.7 desulfurization of desulfurizer is entered back into, is then discharged by chimney.
In order to further decrease flue-gas temperature, it can be equipped with the second level between electrical dust collector device 5 and desulfurizer 7 and exchange heat
Device 6, specifically: the outlet end 52 of electrical dust collector device 5 is connected with the input end 61 of second level heat exchanger 6 by pipeline, and second
The outlet end 62 of grade heat exchanger 6 is connected with the input end 71 of desulfurizer 7 by pipeline, and the outlet end 72 of desulfurizer 7 connects
Pass to chimney.
In order to further utilize the waste heat in flue gas, second level heat exchanger 6 is equipped with inlet of cold air end 63 and hot-air goes out
Mouthful end 64 is equipped with hot-air on air preheater 1 and answers back end 13, flue gas is carried out in second level heat exchanger 6 and air (comes
From in the cold air at inlet of cold air end 63) heat exchange, and the hot-air after heat exchange 13 is delivered to by hot-air end of answering back
Air preheater 1 improves the secondary air temperature for entering air preheater 1, and can reduce conventional steam air heater in this way uses quantity of steam, increases
The combustion efficiency of strong boiler；Furthermore the flue-gas temperature at air preheater outlet end 12 can be improved, be that fume afterheat is further sharp
With the condition of offer.
In the actual work, it requires consideration for how to realize that the exhaust gases passes of 2 installation site of first order heat exchanger (are managed
Road) in actual internal area it is constant, in this case, change appropriate made to original exhaust gases passes, increase the section
The geometric dimension of exhaust gases passes, as shown in Fig. 2, the means that the present invention uses are as follows: the flue gas being connected with the first circuit inlet end 21
Channel inlet section 27 is gradual-enlargement type bell-mouth structure of air, and the exhaust gases passes air outlet section 28 being connected with the first circuit outlet end 22 is tapered
Formula bell-mouth structure of air keeps the actual internal area of the exhaust gases passes in first order heat exchanger 2 constant.Its theory is to change the first order
The exhaust gases passes air inlet section 27 of hot 2 front position of device is designed using gradual-enlargement type horn mouth, by 2 back-end location of first order heat exchanger
Exhaust gases passes air outlet section 28 is designed using tapering type horn mouth, first order heat exchanger 2 can be made to be mounted in exhaust gases passes in this way
Guarantee that actual internal area is constant.Similarly, the exhaust gases passes air inlet section that the present invention is connected with input end 61 is gradual-enlargement type horn mouth knot
Structure, the exhaust gases passes air outlet section being connected with outlet end 62 are tapering type bell-mouth structure of air, make the flue gas stream in second level heat exchanger 6
Logical sectional area is constant.
First order heat exchanger 2 is mounted in exhaust gases passes, needing to give consideration to how can make the first order newly increased exchange heat
Device 2 is stable and firm in exhaust gases passes, is based on this, and the invention also includes supporting element, supporting element is arranged in exhaust gases passes air inlet section
27 and first between circuit inlet end 21, while supporting element is additionally arranged at exhaust gases passes air outlet section 28 and the first circuit outlet end 22
Between, for providing fixed support to first order heat exchanger 2.Similarly, the present invention input end 61 and exhaust gases passes air inlet section it
Between supporting element is set, supporting element is set between outlet end 62 and exhaust gases passes air outlet section, for second level heat exchanger 6 provide
Fixed support.
In order to make first order heat exchanger 2 that gas-liquid heat exchange (flue gas and condensed water i.e. in exhaust gases passes be better achieved
Device 3, Absorption Refrigerator 4 liquid between carry out heat exchange), and flue gas can be prevented to the knot of first order heat exchanger 2
It is configured to damage, the invention also includes wear strip (not shown), wear strip is mounted on the front end heat exchanger tube of first order heat exchanger 2
It is anti-wear for playing the role of at windward side.Further it is preferably, in meeting for three row's heat exchanger tube of the front end of first order heat exchanger 2
Wind face is respectively mounted wear strip.
First order heat exchanger 2 of the invention is accomplished that gas-liquid heat exchange, and due to carrying cigarette ash in flue gas, cigarette ash is passing through the
It can be adhered to when first-class heat exchanger 2 on the heat exchanger tube of first order heat exchanger 2, the quality of gas-liquid heat exchange can be reduced in this way, in order to
Enough guarantee heat exchange quality, the present invention requires consideration for how to be adhered to cigarette ash on heat exchanger tube and is adhered in first order heat exchanger 2
Cigarette ash on wall is disposed, and is based on this, the invention also includes two pressure dynamometers, a pressure dynamometer is mounted on the first order
On the exhaust gases passes of 2 front of heat exchanger, for measuring the flue gas pressures for not entering first order heat exchanger 2, another pressure dynamometry
Device is mounted on the exhaust gases passes at 2 rear portion of first order heat exchanger, for measuring the flue gas pressures of the discharge of first order heat exchanger 2；With
Shock wave soot blower (not shown), shock wave soot blower are mounted in first order heat exchanger 2, the pressure between two pressure dynamometers
It when difference is greater than 400Pa, then proves in first order heat exchanger 2 dust stratification, needs soot blowing, at this moment start shock wave soot blower and carry out soot blowing
Processing.In order to improve soot blowing quality, shock wave soot blower of the invention be it is multiple, quantity and the first order of shock wave soot blower are changed
The number of rows of heat exchanger tube is identical in hot device 2, is separately mounted to the side of every row's heat exchanger tube of first order heat exchanger 2, is used for the row
Cigarette ash is blown off on heat exchanger tube.
Gas-gas heat exchanges different from the gas-liquid heat exchange of first order heat exchanger 2, that second level heat exchanger 6 carries out, are changed in the second level
The flue gas specific heat capacity and air specific heat capacity of hot device 6 are not much different, much smaller than specific heat capacity and liquid (the i.e. condensate water device 3 of flue gas
With working-medium water in Absorption Refrigerator 4) specific heat capacity difference, so heat exchange area in second level heat exchanger 6 and volume foot
It is enough to can be achieved with exchanging heat greatly；But second level heat exchanger 6 is the direct cold air for borrowing external environment, is needed in this case
Consider how solve cold air Anticorrosion, be based on this, the heat exchanger tube of second level heat exchanger 6 of the invention be selected as glass tube or
Ceramic tube makes full use of the corrosion resistant stability of glass tube and ceramic tube.Furthermore flue-gas temperature should not also reduce excessively, with
Meet premised on subsequent desulfurization needs, temperature be reduced to 50 DEG C~70 DEG C it is more appropriate, optimum temperature is 70 DEG C, and (i.e. the second level is changed
The temperature of 62 smoke dischargings in outlet end is 70 DEG C after hot device 6 exchanges heat)；Temperature is reduced to the temperature of the needs of desulfurizer 7, if warm
Degree is higher than the gas inlet temperature that desulfurizer 7 needs, then needs to continue spray cooling, waste water.If temperature is lower than de-
The gas inlet temperature that sulphur device 7 needs, then influence desulfurization effect.The control of flue-gas temperature can be exchanged heat using the second level is entered
The flow of the cold air of device 6 and bypass amount are realized, when flue-gas temperature is low, reduce the cold air for entering second level heat exchanger 6
Amount increases bypass amount；Otherwise increases the cold air amount of second level heat exchanger that enters, reduces bypass amount.
In the preferred embodiment, by two-stage heat exchanger, and the heating water and hot-air that heat exchanger obtains are obtained again
Secondary utilization, has saved cost, prevents from polluting the environment.
To sum up, the present invention may be implemented it is following the utility model has the advantages that
1, exhaust gas temperature is reduced, the efficiency of boiler is improved；
2, the secondary air temperature for entering boiler is improved, the efficiency of combustion of boiler is improved；
3, it is lowered into the flue-gas temperature of electrical dust collector device 5, improves the service efficiency of electrical dust collector device 5, reduces electric precipitation
The power consumption of device 5；
4, it by extracting the cold water and flue gas heat exchange of a part, stands fast in condensate water device 3 (i.e. power plant's heat regenerative system) and taking out
Vapour amount reduces the heat consumption rate of power plant；Using fume afterheat as the driving heat source of Absorption Refrigerator 4, Absorption Refrigerator 4 is defeated
Cooling capacity is used to all refrigeration dutys supplied in power plant out, reduces the station service power consumption rate of power plant.
As known by the technical knowledge, the present invention can pass through the embodiment party of other essence without departing from its spirit or essential feature
Case is realized.Therefore, embodiment disclosed above, in all respects are merely illustrative, not the only.Institute
Have within the scope of the present invention or is included in the invention in the change being equal in the scope of the present invention.
Claims (3)
1. a kind of coal steam-electric plant smoke comprehensive waste-heat utilizing device, it is characterised in that: including air preheater, first order heat exchanger,
Condensate water device, Absorption Refrigerator, electrical dust collector device, desulfurizer, chimney and supporting element；
Flue gas is entered in the air preheater by the gas inlet end of the air preheater, the flue gas of the air preheater
Outlet end is connected with the first circuit inlet end of the first order heat exchanger by pipeline；The first of the first order heat exchanger
Circuit outlet end is connected with the input end of the electrical dust collector device by pipeline；The outlet end of the electrical dust collector device with it is described
The input end of desulfurizer is connected by pipeline；The outlet end of the desulfurizer passes through pipeline connection to the chimney；
The second servo loop outlet end of the first order heat exchanger is connected with the input end of the condensate water device by pipeline；Institute
The outlet end for stating condensate water device is connected with the second servo loop input end of the first order heat exchanger by pipeline；
The tertiary circuit outlet end of the first order heat exchanger is connected with the input end of the Absorption Refrigerator by pipeline；
The outlet end of the Absorption Refrigerator is connected with the tertiary circuit input end of the first order heat exchanger by pipeline；
The exhaust gases passes air inlet section being connected with the first circuit inlet end of the first order heat exchanger is gradual-enlargement type bell-mouth structure of air,
The exhaust gases passes air outlet section being connected with the first circuit outlet end of the first order heat exchanger is tapering type bell-mouth structure of air, makes institute
The actual internal area for stating the exhaust gases passes in first order heat exchanger is constant；
The supporting element is arranged between the exhaust gases passes air inlet section and first circuit inlet end, while the supporting element
It is additionally arranged between the exhaust gases passes air outlet section and first circuit outlet end, for providing the first order heat exchanger
Fixed support；
Further include:
Wear strip, the wear strip is mounted at the windward side of the front end heat exchanger tube of the first order heat exchanger, anti-for playing
Abrasive action；
The input end of second level heat exchanger, the second level heat exchanger is connected with the outlet end of the electrical dust collector device by pipeline
It is logical；The outlet end of the second level heat exchanger is connected with the input end of the desulfurizer by pipeline；
The exhaust gases passes air inlet section being connected with the input end of the second level heat exchanger is gradual-enlargement type bell-mouth structure of air, with described the
The connected exhaust gases passes air outlet section in the outlet end of secondary heat exchanger is tapering type bell-mouth structure of air, is made in the second level heat exchanger
Flue gas actual internal area it is constant；
Two pressure dynamometers, a pressure dynamometer are mounted on the exhaust gases passes of first order heat exchanger front,
For measuring the flue gas pressures for not entering the first order heat exchanger, another described pressure dynamometer is mounted on the first order
On the exhaust gases passes at heat exchanger rear portion, for measuring the flue gas pressures of the first order heat exchanger discharge；With
Shock wave soot blower, the shock wave soot blower are mounted in first order heat exchanger, when between two pressure dynamometers
When pressure difference is greater than 400Pa, starts the shock wave soot blower and carry out soot blowing processing；
The shock wave soot blower be it is multiple, it is identical as the number of rows of heat exchanger tube in the first order heat exchanger, be separately mounted to described
The side of every row's heat exchanger tube of first order heat exchanger, for blowing cigarette ash on row's heat exchanger tube off.
2. coal steam-electric plant smoke comprehensive waste-heat utilizing device according to claim 1, it is characterised in that:
The second level heat exchanger is additionally provided with inlet of cold air end and hot air outlet end, is additionally provided on the air preheater
Hot-air is answered back end；
The inlet of cold air end of the second level heat exchanger is communicated with atmosphere；The hot air outlet end of the second level heat exchanger with
The hot-air of the air preheater answers back to hold to be connected by pipeline.
3. coal steam-electric plant smoke comprehensive waste-heat utilizing device according to claim 2, it is characterised in that:
The heat exchanger tube of the second level heat exchanger is glass tube or ceramic tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610815429.5A CN106247371B (en) | 2014-08-28 | 2015-01-07 | A comprehensive utilization device for flue gas waste heat in a thermal power plant |
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| CN201420493120 | 2014-08-28 | ||
| CN201510007428.3A CN104534450B (en) | 2014-08-28 | 2015-01-07 | A comprehensive utilization device for flue gas waste heat in a thermal power plant |
| CN201610815429.5A CN106247371B (en) | 2014-08-28 | 2015-01-07 | A comprehensive utilization device for flue gas waste heat in a thermal power plant |
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| CN201510007428.3A Division CN104534450B (en) | 2014-08-28 | 2015-01-07 | A comprehensive utilization device for flue gas waste heat in a thermal power plant |
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| CN106247371A CN106247371A (en) | 2016-12-21 |
| CN106247371B true CN106247371B (en) | 2018-12-28 |
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| CN201520009067.1U Expired - Lifetime CN204438087U (en) | 2014-08-28 | 2015-01-07 | A kind of coal steam-electric plant smoke comprehensive waste-heat utilizing device |
| CN201510007428.3A Active CN104534450B (en) | 2014-08-28 | 2015-01-07 | A comprehensive utilization device for flue gas waste heat in a thermal power plant |
| CN201610815429.5A Active CN106247371B (en) | 2014-08-28 | 2015-01-07 | A comprehensive utilization device for flue gas waste heat in a thermal power plant |
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| CN201520009067.1U Expired - Lifetime CN204438087U (en) | 2014-08-28 | 2015-01-07 | A kind of coal steam-electric plant smoke comprehensive waste-heat utilizing device |
| CN201510007428.3A Active CN104534450B (en) | 2014-08-28 | 2015-01-07 | A comprehensive utilization device for flue gas waste heat in a thermal power plant |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204438087U (en) * | 2014-08-28 | 2015-07-01 | 国电龙源电力技术工程有限责任公司 | A kind of coal steam-electric plant smoke comprehensive waste-heat utilizing device |
| CN105737123B (en) * | 2016-04-15 | 2017-10-13 | 中冶华天工程技术有限公司 | Blast furnace gas distributed energy resource system |
| CN108131656B (en) * | 2017-07-10 | 2024-03-15 | 昊姆（上海）节能科技有限公司 | Ultra-clean emission cold and hot co-production system of coking plant |
| CN107860022B (en) * | 2017-11-28 | 2023-10-24 | 西安交通大学 | A tube air preheater with variable flue cross section |
| CN111908686B (en) * | 2020-06-22 | 2021-10-08 | 西安交通大学 | Desulfurization wastewater zero-discharge system and method for deep utilization of flue gas waste heat |
| CN113623895B (en) * | 2021-07-01 | 2022-11-01 | 华电电力科学研究院有限公司 | Combined cooling heating and power system for cooling data center and control method thereof |
| CN114001558A (en) * | 2021-11-15 | 2022-02-01 | 南通山剑石墨设备有限公司 | Flue gas waste heat reutilization process device |
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2015
- 2015-01-07 CN CN201520009067.1U patent/CN204438087U/en not_active Expired - Lifetime
- 2015-01-07 CN CN201510007428.3A patent/CN104534450B/en active Active
- 2015-01-07 CN CN201610815429.5A patent/CN106247371B/en active Active
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| CN2632589Y (en) * | 2003-06-06 | 2004-08-11 | 天津大学 | Hot piping double-effect lithium bromide absorbing cold hot water apparatus with smoke waste heat drive |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104534450B (en) | 2016-10-26 |
| CN106247371A (en) | 2016-12-21 |
| CN204438087U (en) | 2015-07-01 |
| CN104534450A (en) | 2015-04-22 |
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