CN110848723A - Flue gas white elimination system and method - Google Patents
Flue gas white elimination system and method Download PDFInfo
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- CN110848723A CN110848723A CN201911063554.5A CN201911063554A CN110848723A CN 110848723 A CN110848723 A CN 110848723A CN 201911063554 A CN201911063554 A CN 201911063554A CN 110848723 A CN110848723 A CN 110848723A
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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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- 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
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
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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
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention relates to the technical field of flue gas treatment, in particular to a flue gas whitening system, which comprises: the device comprises a shell, a fan, an evaporator, a water baffle, a condenser, a compressor and a throttling element, wherein the fan, the evaporator, the water baffle, the condenser, the compressor and the throttling element are arranged in the shell; the compressor, the condenser, the throttling element and the evaporator are sequentially connected to form a first heat exchange cycle. The invention not only can simplify the process flow of the smoke whitening, but also can greatly reduce the energy consumption required by the smoke whitening.
Description
Technical Field
The invention relates to the technical field of flue gas treatment, in particular to a flue gas whitening system and a flue gas whitening method.
Background
The flue gas is a mixture of gas and smoke dust, the components of the flue gas are complex, the gas comprises water vapor, sulfur dioxide, nitrogen, oxygen, carbon monoxide, carbon dioxide, hydrocarbons, nitrogen oxides and the like, and the smoke dust comprises ash, coal particles, oil drops, high-temperature cracking products and the like of fuel. The white smoke is formed by smoke rich in moisture, is a main reason for polluting atmosphere of residential areas, not only influences the environment, but also damages the health of people. The industries such as steel or power plants can continuously generate a large amount of smoke in the operation process, the smoke rich in moisture is discharged into the atmosphere and can be contacted with the air, the smoke is cooled, and the moisture in the smoke can be condensed to generate white smoke. If the white smoke is not treated, a large amount of moisture can be taken away, and the environment is corroded and polluted. Therefore, in order to achieve environmental protection, the flue gas needs to be dehydrated and whitened before being discharged. The white elimination treatment is to cool and dehumidify the flue gas, and then heat and discharge the flue gas. Therefore, the temperature and the humidity of the smoke are changed, and the phenomenon of white smoke caused by carrying away a large amount of moisture or contacting with air can be avoided when the smoke is discharged. The pollution of white smoke is relieved, and the natural environment is protected. In the prior art, the white flue gas can be cooled, heated, dehumidified, humidified and even filtered, so that the white flue gas can be well treated, and the pollution to the environment caused by the white flue gas directly discharged into the atmosphere is avoided.
Although the prior art can well realize the whitening of the smoke and solve the problem of the pollution of the white smoke, the defects still exist in the process of whitening the smoke. For example, in the process of cooling and heating white smoke, the prior art needs two energy sources, one for cooling and one for heating, and in addition, a set of refrigeration equipment needs to be arranged to cool the smoke, and another set of heating equipment heats the smoke, so that the whole process flow of smoke whitening can be completed only by arranging independent energy sources and processing equipment respectively. Although this can achieve the purpose of white smoke abatement, the white smoke treatment device is extremely complicated in arrangement, and two energy sources are required to be provided at the same time, which makes the whole process flow of the smoke abatement energy consumption huge. The prior art flue gas whitening, whether in the method and arrangement of the device, makes the cost very high. Therefore, there is a need for a device and a method that can simplify the process flow of the smoke whitening and greatly reduce the energy consumption required by the smoke whitening.
Disclosure of Invention
In order to solve the above problems, the present invention provides a system and a method for eliminating smoke white, which simplify the process flow of smoke white elimination and greatly reduce the energy consumption required by smoke white elimination.
The technical scheme adopted by the invention is as follows:
a flue gas whitening system, comprising: the device comprises a shell, a fan, an evaporator, a water baffle, a condenser, a compressor and a throttling element, wherein the fan, the evaporator, the water baffle, the condenser, the compressor and the throttling element are arranged in the shell; the compressor, the condenser, the throttling element and the evaporator are sequentially connected to form a first heat exchange cycle.
The scheme adopts a set of cold and hot homologous system, and a flue gas channel is formed by sequentially connecting a flue gas inlet, a fan, an evaporator, a water baffle, a condenser and a flue gas outlet; and then the compressor, the condenser, the throttling element and the evaporator are sequentially connected to form a first heat exchange cycle. The flue gas channel and the first heat exchange cycle work simultaneously and interact with each other to realize the whole flow of flue gas whitening. The specific process comprises the following steps: the fan sucks high-temperature flue gas into the system from the flue gas inlet, the flue gas enters the system and firstly reaches the evaporator, the evaporator cools the flue gas, the heat of the flue gas is absorbed, the cooled flue gas flows through the water baffle, the condensed moisture in the flue gas is intercepted by the water baffle under the driving of wind power, and the flue gas continuously moves forward in the flue gas channel and enters the condenser. At the moment, the heat absorbed by the evaporator when the flue gas is cooled is transported to the condenser through the first heat exchange cycle, the condenser releases the transported heat to heat the flue gas, and the finally heated flue gas is discharged from the smoke exhaust port. Because the cold and hot energy is transferred in the same system, all the steps of the smoke whitening can be independently completed by only one energy source in the scheme, the system of the scheme not only simplifies the whole process flow of the smoke whitening, reduces the number of required devices, reduces the operation cost, but also has the advantages of energy conservation and consumption reduction, and has remarkable energy conservation compared with the prior art.
Furthermore, the system also comprises a heat absorber and a heat radiator, wherein the smoke inlet, the fan, the heat absorber, the evaporator, the water baffle, the heat radiator, the condenser and the smoke outlet are sequentially connected to form a smoke channel; the heat absorber is connected with the heat radiator to form a second heat exchange cycle.
Specifically, add heat absorber, heat emitter for the system, the flue gas passageway is: the heat exchanger is connected with the heat radiator to form a second heat exchange cycle. When the flue gas enters the flue gas channel from the flue gas inlet, the flue gas flows through the heat absorber before the evaporator cools the flue gas, and the heat absorber absorbs the heat of the flue gas to primarily cool the flue gas; when the flue gas passes through the water baffle, the flue gas reaches the heat radiator before the condenser heats the flue gas. At this moment, the heat that absorbs when the heat absorber carries out preliminary cooling to the flue gas transports the heat emitter through second heat transfer circulation, and the heat emitter releases the heat of transportation and carries out preliminary heating to the flue gas. The heat absorber and the heat radiator finish primary cooling and primary heating in the system, reduce the load of the evaporator and the condenser, reduce the energy output requirement of the original system, and the second heat exchange circulation formed by the heat absorber and the heat radiator realizes the mutual transfer of cold and heat energy in the same circulation, thus further reducing the energy consumption of the whole system.
Furthermore, the system also comprises a precooler and a cooling tower, wherein the smoke inlet, the fan, the heat absorber, the precooler, the evaporator, the water baffle, the heat radiator, the condenser and the smoke outlet are sequentially connected to form a smoke channel; and the cooling tower is connected with the precooler to form a third heat exchange cycle.
Specifically, before the flue gas gets into the evaporimeter and cools down and dehumidifies, the precooler of flowing through earlier, and the precooler cools down the dehumidification to it, and the cooling tower is connected with the precooler and is formed the third heat transfer circulation, and the third heat transfer circulation of this scheme is water-cooling, and is very little to the required requirement of energy consumption, and the cooling effect to the flue gas is showing very much, consequently adopts the mode of water-cooling can further energy-conservation.
Further, the system also comprises a thermostat, wherein the thermostat is arranged after the condenser; the temperature regulator is connected with the cooling tower to form a fourth heat exchange cycle.
Specifically, the cooling tower is also connected to a thermostat, which regulates the temperature of the flue gas as it passes through the thermostat before exiting the system. The cooling tower is connected with the temperature regulator to form a fourth heat exchange circulation, the fourth heat exchange circulation also adopts water cooling, and similarly, the fourth heat exchange circulation has very small requirements on energy consumption, but is very obvious on the temperature regulation effect of the flue gas, so that the energy can be further saved.
Further, the heat exchange medium of the third heat exchange cycle and/or the fourth heat exchange cycle is water or brine.
Further, the evaporator and/or the condenser and/or the precooler and/or the attemperator are finned tube heat exchangers.
Specifically, the system is additionally provided with a water receiving disc, the heat absorber, the precooler, the evaporator, the water baffle, the condenser, the heat radiator, the temperature regulator and other components are arranged above the inner part of the shell, the water receiving disc is arranged below the heat absorber, the precooler, the evaporator, the water baffle, the condenser, the heat radiator and the temperature regulator, and the water receiving disc can discharge redundant water generated when the heat absorber, the precooler, the evaporator, the water baffle, the condenser, the heat radiator and the temperature regulator work to corresponding places, so that the influence on other devices is avoided, and the interference on the operation of the system is avoided.
A smoke whitening method is used for the smoke whitening system, and comprises the following steps:
the flue gas is introduced into an evaporator, and the evaporator absorbs first heat to cool the flue gas;
guiding the cooled flue gas into a water baffle;
the flue gas through the water baffle is introduced into a condenser, the condenser releases first heat to heat the flue gas, and the heated flue gas is discharged out of the system.
Specifically, the evaporator cools down the flue gas, absorbs first heat to adopted the heat pipe principle, taken first heat to the condenser through freon, released when the condenser heats the flue gas, realized thermal transfer and utilization with this, reached energy-conserving purpose of reducing consumption.
Further, before the step of guiding the flue gas into the evaporator, the method further comprises the following steps:
the flue gas is guided to enter a heat absorber, and the heat absorber absorbs second heat to carry out primary cooling on the flue gas;
after the step of guiding the flue gas into the water baffle and before the step of guiding the flue gas into the condenser, the method further comprises the following steps:
and (4) guiding the flue gas into a heat radiator, and releasing second heat by the heat radiator to preliminarily heat the flue gas.
Specifically, the heat absorber cools down the flue gas, absorbs the second heat to also adopted the heat pipe principle, taken the second heat to the heat emitter through freon, released when the heat emitter heats the flue gas, further reached energy-conserving purpose of reducing consumption with this realization heat transfer and utilization.
Further, after the step of guiding the flue gas into the heat absorber and before the step of guiding the flue gas into the evaporator, the method further comprises the following steps:
and (4) guiding the flue gas into a precooler to cool the flue gas.
Specifically, low-temperature cooling water provided by a cooling tower flows in the precooler, and the cooling water is utilized to reduce the cooling energy consumption.
Further, after the step of introducing the flue gas into the condenser and before the step of exhausting the flue gas out of the system, the method further comprises the following steps:
and (4) guiding the flue gas into a temperature regulator to regulate the temperature of the flue gas.
In particular, the temperature regulator utilizes cooling water to reduce the energy consumption of temperature reduction.
Compared with the prior art, the invention has the beneficial effects that:
(1) the device with cold and hot sources is adopted for smoke whitening, the process flow of smoke whitening is simplified, and the equipment and operation cost is reduced.
(2) The evaporator, the condenser, the heat absorber and the heat radiator realize that cold and hot energy is only transferred in the same system in the process of cooling and heating, thereby realizing energy conservation and consumption reduction.
(3) The precooler and the temperature regulator further save energy and reduce consumption of the whole system by utilizing the characteristic that the water cooling energy consumption is low but the temperature regulation effect is obvious.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic view of a first heat exchange cycle of the present invention;
FIG. 3 is a schematic view of a second heat exchange cycle of the present invention;
in the figure: 1-smoke inlet, 2-fan, 3-precooler, 4-evaporator, 5-water baffle, 6-condenser, 7-temperature regulator, 8-smoke outlet, 9-water pan, 10-cooling tower, 11-compressor, 12-shell, 14-throttling element, 15-heat absorber, 16-heat radiator.
Detailed Description
The drawings are only for purposes of illustration and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Examples
The embodiment provides a smoke whitening system, fig. 1 is a schematic diagram of the system of the present invention, and as shown in the figure, the system includes: the device comprises a shell 12, a fan 2, an evaporator 4, a water baffle 5, a condenser 6, a compressor 11 and a throttling element 14, wherein the fan 2, the evaporator 4, the water baffle 5, the condenser 6, the compressor 11 and the throttling element 14 are arranged in the shell 12, the shell 12 is provided with a smoke inlet 1 and a smoke outlet 8, and the smoke inlet 1, the fan 2, the evaporator 4, the water baffle 5, the condenser 6 and the smoke outlet 8 are sequentially connected to form a smoke channel; fig. 2 is a schematic diagram of a first heat exchange cycle of the present invention, and as shown in the figure, the compressor 11, the condenser 6, the throttling element 14 and the evaporator 4 are connected in sequence to form the first heat exchange cycle.
In the embodiment, a set of cold and hot homologous system is adopted, and a flue gas channel is formed by sequentially connecting a flue gas inlet 1, a fan 2, an evaporator 4, a water baffle 5, a condenser 6 and a flue gas outlet 8; the compressor 11, the condenser 6, the throttling element 14 and the evaporator 4 are then connected in sequence to form a first heat exchange cycle. The flue gas channel and the first heat exchange cycle work simultaneously and interact with each other to realize the whole flow of flue gas whitening. The specific process comprises the following steps: the fan 2 sucks high-temperature flue gas into the system from the flue gas inlet 1, the flue gas enters the system and firstly reaches the evaporator 4, the evaporator 4 cools the flue gas, the heat of the flue gas is absorbed, the cooled flue gas flows through the water baffle 5, the condensed moisture in the flue gas is intercepted by the water baffle 5 under the driving of wind power, and the flue gas continuously moves forward in the flue gas channel and enters the condenser 6. At this moment, the heat absorbed by the evaporator 4 when the flue gas is cooled is transported to the condenser 6 through the first heat exchange cycle, the condenser 6 releases the transported heat to heat the flue gas, and the flue gas after being heated is discharged from the flue gas outlet 8. Because the cold and hot energy is transferred in the same system, in the embodiment, all the steps of the flue gas whitening can be independently completed by only one energy source, and the system of the embodiment not only simplifies the whole process flow of the flue gas whitening, reduces the number of required equipment, lightens the operation cost, but also has the advantages of energy conservation and consumption reduction, and has remarkable energy conservation compared with the prior art.
Further, the system also comprises a heat absorber 15 and a heat radiator 16, wherein the smoke inlet 1, the fan 2, the heat absorber 15, the evaporator 4, the water baffle 5, the heat radiator 16, the condenser 6 and the smoke outlet 8 are sequentially connected to form a smoke channel; fig. 3 is a schematic diagram of a second heat exchange cycle of the present invention, wherein a heat absorber 15 is connected to a heat spreader 16 to form the second heat exchange cycle.
Specifically, a heat absorber 15 and a heat radiator 16 are added into the system, and the flue gas channel is as follows: the heat exchanger comprises a smoke inlet 1, a fan 2, a heat absorber 15, an evaporator 4, a water baffle 5, a heat radiator 16, a condenser 6 and a smoke outlet 8, wherein the heat absorber 15 is connected with the heat radiator 16 to form a second heat exchange cycle. When the flue gas enters the flue gas channel from the flue gas inlet 1, the flue gas flows through the heat absorber 15 before the evaporator 4 cools the flue gas, and the heat absorber 15 absorbs the heat of the flue gas to primarily cool the flue gas; when the flue gas passes through the water baffle 5, the flue gas reaches the heat radiator 16 before the condenser 6 heats the flue gas. At this time, the heat absorbed when the heat absorber 15 preliminarily cools down the flue gas is transported to the heat emitter 16 through the second heat exchange cycle, and the heat emitter 16 releases the transported heat to preliminarily heat the flue gas. The heat absorber 15 and the heat radiator 16 finish primary cooling and primary heating in the system, reduce the load of the evaporator 4 and the condenser 6, reduce the energy output requirement of the original system, and the second heat exchange cycle formed by the heat absorber 15 and the heat radiator 16 realizes mutual transfer of cold and heat energy in the same cycle, so that the energy consumption of the whole system is further reduced.
Further, the system also comprises a precooler 3 and a cooling tower 10, wherein the smoke inlet 1, the fan 2, the heat absorber 15, the precooler 3, the evaporator 4, the water baffle 5, the heat radiator 16, the condenser 6 and the smoke exhaust port 8 are sequentially connected to form a smoke channel; the cooling tower 10 is connected with the precooler 3 to form a third heat exchange cycle.
Specifically, before entering the evaporator 4 for cooling and dehumidifying, the flue gas firstly flows through the precooler 3, the precooler 3 cools and dehumidifies the flue gas, and the cooling tower 10 is connected with the precooler 3 to form a third heat exchange cycle.
Further, the system also comprises a thermostat 7, the thermostat 7 being arranged after the condenser 6; the temperature regulator 7 is connected with the cooling tower 10 to form a fourth heat exchange cycle.
In particular, the cooling tower 10 is also connected to a thermostat 7, which thermostat 7 regulates the temperature of the flue gases as they pass through the thermostat 7 before they exit the system. The cooling tower 10 is connected with the temperature regulator 7 to form a fourth heat exchange cycle, the fourth heat exchange cycle adopts water cooling, and similarly, the fourth heat exchange cycle has small requirements on energy consumption and has obvious temperature regulation effect on the flue gas, so that the energy can be further saved.
Further, the evaporator and/or the condenser and/or the precooler and/or the attemperator are finned tube heat exchangers.
Further, the evaporator 4, the condenser 6, the precooler 3 and the thermostat 7 are all fin-and-tube heat exchangers.
Specifically, the system is further provided with a water receiving tray 9, the heat absorber 15, the precooler 3, the evaporator 4, the water baffle 5, the condenser 6, the heat radiator 16, the temperature regulator 7 and other components are arranged above the inside of the shell 12, the water receiving tray 9 is arranged below the heat absorber 15, the precooler 3, the evaporator 4, the water baffle 5, the condenser 6, the heat radiator 16 and the temperature regulator 7, and the water receiving tray 9 can discharge excessive water generated when the heat absorber 15, the precooler 3, the evaporator 4, the water baffle 5, the condenser 6, the heat radiator 16 and the temperature regulator 7 work to corresponding places, so that influence on other devices is avoided, and the operation of the system is prevented from being interfered.
A smoke whitening method is used for the smoke whitening system, and comprises the following steps:
the flue gas is introduced into an evaporator 4, and the evaporator 4 absorbs first heat to cool the flue gas;
guiding the cooled flue gas into a water baffle 5;
the flue gas passing through the water baffle 5 is introduced into a condenser 6 in a drainage mode, the condenser 6 releases first heat to heat the flue gas, and the heated flue gas is discharged out of the system.
Specifically, the evaporator 4 cools down the flue gas, absorbs first heat, and has adopted the heat pipe principle, takes first heat to the condenser 6 through freon, releases when the condenser 6 heats the flue gas to this realizes thermal transfer and utilizes, reaches energy-conserving purpose of reducing consumption.
Further, before the step of guiding the flue gas into the evaporator 4, the method further comprises the following steps:
the flue gas is guided to enter a heat absorber 15, and the heat absorber 15 absorbs second heat to carry out primary cooling on the flue gas;
after the step of guiding the flue gas into the water baffle 5 and before the step of guiding the flue gas into the condenser 6, the method further comprises the following steps:
the flue gas is guided into the heat emitter 16, and the heat emitter 16 emits the second heat to perform the preliminary heating of the flue gas.
Specifically, the heat absorber 15 cools down the flue gas, absorbs the second heat, and also adopts the heat pipe principle, takes the second heat to the heat emitter 16 through freon, releases when the heat emitter 16 heats the flue gas, thereby realizing the transfer and utilization of the heat, and further achieving the purpose of energy conservation and consumption reduction.
Further, after the step of guiding the flue gas into the heat absorber 15 and before the step of guiding the flue gas into the evaporator 4, the method further comprises the following steps:
the flue gas is introduced into a precooler 3 to cool the flue gas.
Specifically, the precooler 3 flows low-temperature cooling water supplied from the cooling tower 10, and the cooling water is used for reducing the cooling energy consumption.
Further, after the step of introducing the flue gas into the condenser 6 and before the step of discharging the flue gas out of the system, the method further comprises the following steps:
the flue gas is guided into a temperature regulator 7 for temperature regulation of the flue gas.
In particular, the thermostat 7 reduces cooling energy consumption by using cooling water.
The working principle and the working process of the smoke whitening system of the embodiment are briefly described as follows:
the flue gas white elimination system of this embodiment at first uses fan 2 in with the leading-in system of high temperature flue gas that is rich in moisture content, at first reach heat absorber 15, the inside freon refrigerant that is of heat absorber 15 absorbs the high temperature flue gas heat, and adopted the heat pipe principle, bring the heat to radiator 16 end through freon, flue gas after preliminary cooling passes through precooler 3, precooler 3 internal flow has the cryogenic cooling water that comes from cooling tower 10 and provides, the flue gas is dehumidified and is cooled down simultaneously when contacting with precooler 3, precooler 3 utilizes the water-cooling to consume less energy, the characteristics that the cooling effect is showing, energy saving and consumption reduction have been realized. The flue gas passes through the evaporator 4, low-temperature Freon refrigerant flows in the evaporator 4, the flue gas is further cooled and dehumidified by the evaporator 4, then passes through the water baffle 5, when the flue gas passes through the water baffle 5, water drops driven by wind power are intercepted by the water baffle 5, so that the flue gas can pass through the heat radiator 16 without condensed moisture, the heat radiator 16 releases heat transferred from the heat absorber 15 into the flue gas, the flue gas is subjected to primary heating and temperature rise, then the flue gas passes through the condenser 6, high-temperature Freon refrigerant flows in the condenser 6, so that the flue gas is subjected to deep heating and temperature rise, then the high-temperature dry flue gas passes through the temperature regulator 7, low-temperature water flows in the temperature regulator 7 from the cooling tower 10, and the temperature value of the flue gas collected by the temperature sensor can be compared with the set temperature requirement value through the control system, so as to adjust the amount of cooling water supplied to the temperature regulator 7, the cooling amplitude of the high-temperature dry flue gas is adjusted, and after the process, the dry flue gas reaching the set temperature enters a chimney through a smoke exhaust port 8 and is exhausted out of the atmospheric environment.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention claims should be included in the protection scope of the present invention claims.
Claims (10)
1. A flue gas whitening system, comprising: the device comprises a shell, a fan, an evaporator, a water baffle, a condenser, a compressor and a throttling element, wherein the fan, the evaporator, the water baffle, the condenser, the compressor and the throttling element are arranged in the shell; the compressor, the condenser, the throttling element and the evaporator are sequentially connected to form a first heat exchange cycle.
2. The system according to claim 1, further comprising a heat absorber and a heat radiator, wherein the flue gas inlet, the fan, the heat absorber, the evaporator, the water baffle, the heat radiator, the condenser and the flue gas outlet are connected in sequence to form a flue gas channel; the heat absorber is connected with the heat radiator to form a second heat exchange cycle.
3. The system of claim 2, further comprising a precooler and a cooling tower, wherein the flue gas inlet, the fan, the heat absorber, the precooler, the evaporator, the water baffle, the heat radiator, the condenser and the flue gas outlet are connected in sequence to form a flue gas channel; and the cooling tower is connected with the precooler to form a third heat exchange cycle.
4. The system of claim 3, further comprising a temperature regulator, wherein the flue gas inlet, the fan, the heat absorber, the precooler, the evaporator, the water baffle, the heat radiator, the condenser, the temperature regulator and the flue gas outlet are sequentially connected to form a flue gas channel; the temperature regulator is connected with the cooling tower to form a fourth heat exchange cycle.
5. The flue gas whitening system of claim 4, wherein the heat exchange medium of the third heat exchange cycle and/or the fourth heat exchange cycle is water or brine.
6. The flue gas whitening system of claim 5, wherein the evaporator and/or condenser and/or precooler and/or attemperator is a finned-tube heat exchanger.
7. A method of smoke whitening for a smoke whitening system as claimed in any one of claims 1 to 6, characterized in that it comprises the following steps:
guiding the flue gas into an evaporator through a flue gas inlet, and absorbing first heat by the evaporator to cool the flue gas;
guiding the cooled flue gas into a water baffle;
guiding the flue gas passing through the water baffle into a condenser, and releasing first heat by the condenser to heat the flue gas;
and discharging the heated flue gas out of the system through a flue gas outlet.
8. The method of claim 7, further comprising, prior to the step of directing the flue gas into the evaporator, the steps of:
the flue gas is guided to enter a heat absorber, and the heat absorber absorbs second heat to carry out primary cooling on the flue gas;
after the step of guiding the flue gas into the water baffle and before the step of guiding the flue gas into the condenser, the method further comprises the following steps:
and (4) guiding the flue gas into a heat radiator, and releasing second heat by the heat radiator to preliminarily heat the flue gas.
9. The method of claim 8, further comprising the steps of, after the step of channeling the flue gas into the heat absorber and before the step of channeling the flue gas into the evaporator:
and (4) guiding the flue gas into a precooler to cool the flue gas.
10. The method of claim 9, further comprising the steps of, after the step of channeling the flue gas into the condenser and before the step of exhausting the flue gas out of the system:
and (4) guiding the flue gas into a temperature regulator to regulate the temperature of the flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN111365774A (en) * | 2020-03-08 | 2020-07-03 | 中国人民解放军火箭军工程设计研究院 | Smoke-eliminating, dehumidifying and temperature-regulating system for diesel engine of underground engineering |
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