CN112742154A - Device and method for eliminating wet smoke plume by using waste heat of smoke - Google Patents
Device and method for eliminating wet smoke plume by using waste heat of smoke Download PDFInfo
- Publication number
- CN112742154A CN112742154A CN201911043380.6A CN201911043380A CN112742154A CN 112742154 A CN112742154 A CN 112742154A CN 201911043380 A CN201911043380 A CN 201911043380A CN 112742154 A CN112742154 A CN 112742154A
- Authority
- CN
- China
- Prior art keywords
- air
- flue gas
- outlet
- smoke
- mixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000779 smoke Substances 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 48
- 239000002918 waste heat Substances 0.000 title claims abstract description 32
- 239000003570 air Substances 0.000 claims abstract description 221
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 104
- 239000003546 flue gas Substances 0.000 claims abstract description 104
- 238000010438 heat treatment Methods 0.000 claims abstract description 45
- 239000012080 ambient air Substances 0.000 claims abstract description 43
- 238000000746 purification Methods 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000006477 desulfuration reaction Methods 0.000 claims description 8
- 230000023556 desulfurization Effects 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 230000008030 elimination Effects 0.000 claims description 2
- 238000003379 elimination reaction Methods 0.000 claims description 2
- 230000003009 desulfurizing effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000003303 reheating Methods 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000005562 fading Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/005—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by heat treatment
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention discloses a device for eliminating and dehumidifying smoke plume by using smoke waste heat, which comprises: a mixing duct including an ambient air inlet, a hot air inlet, and a mixed air outlet; the air blower comprises an air inlet end and an air outlet end, and the air inlet end is communicated with the mixed air outlet; the heat exchanger comprises a flue gas inlet, a mixed air inlet, a heat exchange area, a flue gas outlet and a hot air outlet, the mixed air inlet is communicated with the air outlet end, the hot air outlet is respectively communicated with a circulating air channel and a heating air channel through a heat exchanger outlet air channel, the circulating air channel is communicated with the hot air inlet, and the flue gas outlet is communicated with the flue gas inlet of the purification tower; the flue gas mixer is arranged in a flue gas channel in a chimney of the purification tower and comprises a flue gas inlet, a hot air inlet, a mixing area and a flue gas mixed gas outlet, and the hot air inlet is communicated with the hot air channel. The invention also discloses a method for eliminating the moisture smoke plume by using the smoke waste heat.
Description
Technical Field
The invention belongs to the technical field of waste gas treatment, relates to a treatment technology of colored smoke plume, and particularly relates to a device and a method for eliminating wet smoke plume by using waste heat of smoke.
Background
When wet desulphurization is adopted for flue gas desulphurization, the flue gas at a desulphurization outlet is usually in a saturated humidity state, the saturated humidity flue gas is rapidly cooled by the atmosphere with lower temperature after being discharged from a chimney, water vapor in the flue gas is condensed into a liquid state, and the light transmittance is reduced, so that the phenomenon of white smoke plume visible to naked eyes appears; along with the diffusion of the water vapor in the atmosphere, the concentration of the water vapor is reduced, the light transmittance is improved, and the white smoke plume is slowly reduced until disappears and cannot be seen.
There are generally three solutions to reduce the appearance of white smoke: (1) smoke is condensed, the temperature of the smoke is reduced, the condensed moisture is extracted, the moisture of the smoke is reduced, the temperature difference between the smoke and the ambient air is reduced, the change curve of the smoke and the saturation curve are not intersected or the intersection section is reduced, and the white smoke emission phenomenon can be reduced or completely eliminated by the method; (2) heating the flue gas, and increasing the temperature of the flue gas to enable the flue gas parameters at the outlet of the chimney to be far away from the saturation curve; (3) the smoke is condensed and heated, so that the moisture of the discharged smoke can be reduced, and the smoke parameters at the outlet of the chimney can be far away from the saturation curve. Wherein, (2) flue gas heating and (3) first condensing and reheating are the main methods applied to the existing white-removing process.
However, the chimneys of many wet desulphurization devices are placed on the top of the desulphurization tower and are integrally arranged with the smoke tower. Therefore, no reserved space and load are generally provided, and if the flue gas condensing or reheating heat exchanger is additionally arranged on a chimney at the top of the tower, the modification amount of the desulfurizing tower is very large, the investment for engineering implementation is large, and the construction period is long.
The flue gas reheating is not limited to heating by using a heat exchanger at a chimney, and one of flue gas heating modes is mixed air heating, namely, a certain amount of hot air is mixed with clean flue gas at the outlet of a desulfurizing tower, so that the temperature of the mixed clean flue gas is improved. The purified flue gas temperature can be increased while the flue gas humidity can be reduced, which is equivalent to further increasing the superheat degree, thereby eliminating white smoke plume.
The hot air source that usually needs is that ambient air passes through the heat transfer with desulfurizing tower entry flue gas promptly and obtains, in order to prevent the low temperature corrosion of flue gas and air heat exchanger, can not directly be with the heat transfer of ambient cold air and hot flue gas, need do the heat transfer with the flue gas after the cold air is properly preheated.
Therefore, the primary steam, the heat medium water or the electric heater is added before or after heat exchange with the flue gas to heat the air, but the air volume of the mixed ambient air is large, so that a large amount of energy is consumed for heating the ambient air, and the operation cost is high.
Disclosure of Invention
Aiming at the problems, the invention provides a method and a device for eliminating and removing smoke plume by using smoke waste heat. According to the method and the device for removing and eliminating the smoke plume by using the smoke waste heat, a smoke reheater is not required to be arranged on a chimney at the top of the tower, the modification amount of the absorption tower is small, the hot air is mainly generated by exchanging heat between the ambient air and the high-temperature raw smoke, the using amount of steam or hot medium water is greatly reduced, and the energy-saving effect is good.
Therefore, the invention provides a device for eliminating and dehumidifying smoke plume by using smoke waste heat, which comprises:
a mixing duct including an ambient air inlet, a hot air inlet, and a mixed air outlet;
the air blower comprises an air inlet end and an air outlet end, and the air inlet end is communicated with the mixed air outlet;
the heat exchanger comprises a flue gas inlet, a mixed air inlet, a heat exchange area, a flue gas outlet and a hot air outlet, the mixed air inlet is communicated with the air outlet end, the hot air outlet is communicated with a heat exchanger outlet air channel, the heat exchanger outlet air channel is respectively communicated with a circulating air channel and a heating air channel, the circulating air channel is communicated with the hot air inlet, and the flue gas outlet is communicated with the flue gas inlet of the purification tower;
the flue gas mixer is arranged in a flue gas channel in a chimney of the purification tower and comprises a flue gas inlet, a hot air inlet, a mixing area and a flue gas mixed gas outlet, and the hot air inlet is communicated with the hot air channel.
The device for eliminating and dehumidifying smoke plume by using smoke waste heat according to the present invention preferably further comprises:
the preheater comprises a cold air inlet, a heat source inlet, a heat exchange zone, a preheated air outlet and a heat source outlet, and the preheated air outlet is communicated with the ambient air inlet.
At this time, the device for eliminating and dehumidifying smoke plume by using waste heat of smoke according to the present invention is specifically described as including:
the preheater comprises a cold air inlet, a heat source inlet, a heat exchange zone, a preheated air outlet and a heat source outlet;
the air blower comprises an air inlet end and an air outlet end, and the air inlet end is communicated with the preheated air outlet through a preheater outlet air duct;
the heat exchanger comprises a flue gas inlet, a mixed air inlet, a heat exchange area, a flue gas outlet and a hot air outlet, the hot air outlet is respectively communicated with a circulating air channel and a heating air channel through a heat exchanger outlet air channel, the circulating air channel is communicated with a preheater outlet air channel, and the flue gas outlet is communicated with a flue gas inlet of the purification tower;
the flue gas mixer is arranged in a flue gas channel in a chimney of the purification tower and comprises a flue gas inlet, a hot air inlet, a mixing area and a flue gas mixed gas outlet, and the hot air inlet is communicated with the hot air channel.
In the device for removing and dehumidifying smoke plume by using flue gas waste heat, the heat source of the preheater is preferably steam, hot water or hot oil.
The device for eliminating and dehumidifying smoke plume by using smoke waste heat is characterized in that the heat exchanger is preferably a tube bundle heat exchanger or a plate heat exchanger.
In the device for removing and dehumidifying smoke plume by using waste heat of flue gas, a flow regulator is preferably arranged at the communication position of the heat exchanger outlet air duct and the circulating air duct, or a flow regulator is preferably arranged at the communication position of the heat exchanger outlet air duct and the heating air duct.
In the device for removing and dehumidifying smoke plume by using waste heat of flue gas, the purification tower is preferably a desulfurizing tower or a washing tower.
The invention also provides a method for eliminating the moisture smoke plume by using the smoke waste heat, which comprises the following steps:
s1, mixing and heating ambient air and circulating hot air to obtain mixed air;
and S2, after the mixed air exchanges heat with the raw flue gas, the raw flue gas is purified to become clean flue gas, the mixed air is heated to be hot air, one part of the hot air is used as circulating hot air, and the other part of the hot air is used as heating gas to be mixed with the clean flue gas.
The method for eliminating and dehumidifying smoke plume by using smoke waste heat preferably comprises the following steps:
in step S1, the ambient air is preheated by a heat source to be heated to be preheated ambient air, and the preheated ambient air is mixed with the circulated hot air to be heated.
At this time, the method for eliminating the moisture smoke plume by using the smoke waste heat is specifically described as comprising the following steps:
(1) after the ambient air is preheated by steam (the process is a first-stage preheating process or first heating), the ambient air is heated to be preheated ambient air, and the steam is cooled to be condensed water;
(2) mixing and heating the preheated ambient air and circulating hot air (the process is a second-stage preheating process or a second heating process) to obtain mixed air;
(3) after the mixed air exchanges heat with the raw flue gas (the process is a third-stage preheating process or a third heating process), the raw flue gas is purified (desulfurized and/or washed) to become clean flue gas, the mixed air is heated to become hot air, one part of the hot air is used as circulating hot air, and the other part of the hot air is used as heating gas to be mixed with the clean flue gas.
In the method for removing moisture and smoke plume by using waste heat of flue gas, the heat source is preferably steam, hot water or hot oil.
The method for eliminating and dehumidifying the smoke plume by using the waste heat of the smoke is characterized in that the purification is preferably desulfurization and/or washing.
The invention has the following effects: in the device and the method, the hot air and the clean flue gas are directly mixed and heated, and a flue gas reheater is not needed to be arranged on a chimney at the top of the tower, so that the modification amount of the absorption tower is small, the hot air is mainly generated by exchanging heat between the ambient air and the high-temperature raw flue gas, the use of an additional heat source is reduced, and the energy-saving effect is good.
The device and the method can utilize the heat of the original flue gas to the maximum extent, one part of hot air after heat exchange with the original flue gas is sent to the inlet of the air blower to be mixed with the ambient air, the air temperature at the inlet of the air blower is increased, and the other part of hot air is sent to the chimney to be mixed with the clean flue gas. The amount of steam or heating medium water is reduced, energy is saved, and meanwhile, the mixed air temperature can be conveniently controlled under different working conditions, and the method is as follows.
When the air volume of the hot air required by the white-removing process in summer is reduced, the proportion of the circulated hot air and the heated gas can be adjusted, even a heat source such as steam is stopped, namely the first-stage preheating process is stopped, the air is heated by utilizing the waste heat of the flue gas to the maximum extent by adopting the second-stage preheating process, and the white-removing target is realized; when extremely cold weather is met in winter and the air quantity or the air temperature of hot air (heated air) required by the white fading process rises, the heat exchange quantity of a heat source such as steam can be increased or the proportion of the circulated hot air and the heated air can be adjusted through an air door (or a flow regulator), so that the white fading target is achieved.
The device and the method of the invention complement the preheating processes of two stages, namely steam preheating (first stage preheating process) and circulating mixed air preheating (second stage preheating process) in the preheater, maximally utilize the waste heat of the flue gas under the condition of not causing corrosion problem to equipment, save energy, reduce consumption and have higher overall economic value in the service life cycle of the whole system.
Drawings
FIG. 1 is a schematic structural diagram of the device for eliminating wet smoke plume by using the residual heat of smoke in the present invention.
Wherein the reference numerals are:
1. a cold air inlet duct; 2. a preheater; 3. an outlet duct of the preheater; 4. a blower; 5. an air outlet duct of the blower; 6. a heat exchanger; 7. an outlet duct of the heat exchanger; 8. a circulating air duct; 9. heating an air duct; 10. a flue gas duct; 11. an outlet flue of the heat exchanger; 12. a preheater heat source inlet line; 13. a preheater heat source outlet line; 14. a chimney; 15. a flue gas mixer; 16. a desulfurizing tower.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In some embodiments, the device for removing moisture and smoke plume by using waste heat of flue gas provided by the present invention, in operation, as shown in fig. 1, ambient air, i.e. cold air, enters the preheater 2 through the cold air inlet duct 1, and simultaneously, steam enters the preheater 2 through the heat source inlet line 12 of the preheater 2, and in the preheater 2, the steam is cooled to generate condensed water and is discharged through the heat source outlet line 13 of the preheater; the primary preheating (first heating) of the ambient air results in preheated ambient air which enters the preheater outlet duct 3 where it is mixed with the hot air in the circulating duct 8 (second heating) resulting in mixed air at a re-increased temperature.
Under the suction of the air blower 4, the mixed air enters the air blower 4 and enters the heat exchanger 6 through the air blower outlet air duct 5, meanwhile, the raw flue gas enters the heat exchanger 6 through the flue gas duct 10, in the heat exchanger 6, the raw flue gas enters the purification tower (here, the desulfurization tower 16) through the heat exchanger outlet air duct 11 after being cooled, and the mixed air is heated for the third time to obtain hot air.
Then, the hot air enters the heat exchanger outlet air duct 7 and then is divided into two parts, one part enters the circulating air duct 8, and then is mixed with preheated ambient air at the preheater outlet air duct 3, so that the temperature of the ambient air is raised, and secondary heating is carried out; the other part enters a smoke mixer 15 arranged in a smoke channel of the chimney 14 through the heating air duct 9, so that the other part is mixed with the clean smoke, the temperature of the clean smoke is heated, and the aim of eliminating the trailing phenomenon of the white smoke is achieved.
The heat exchanger 6 may take many forms, in some embodiments, a tube bundle heat exchanger, and in other embodiments, a plate heat exchanger.
In some embodiments, the material of the heat exchanger is a metal or an alloy.
All the air ducts and flues (such as the cold air inlet air duct 1, the preheater outlet air duct 3, the blower outlet air duct 5, the heat exchanger outlet air duct 7, the circulating air duct 8, the heating air duct 9, the raw flue gas flue 10, and the heat exchanger outlet flue 11) may be rectangular or circular, and are not limited herein. The material may be metal, alloy, or other material such as glass fiber reinforced plastic, and is not limited herein.
In some embodiments, the method for removing moisture from smoke plume by using waste heat of smoke provided by the present invention can be implemented by the apparatus shown in fig. 1. The method specifically comprises the following steps:
(1) after the ambient air is preheated by steam (the process is a first-stage preheating process or first heating and can be realized by a preheater 2), the ambient air is heated to be preheated ambient air, and the steam is cooled to be condensed water;
(2) the preheated ambient air and the circulating hot air are mixed and heated (the process is a second-stage preheating process or a second heating process which can be realized in an outlet air duct 3 of the preheater) to obtain mixed air;
(3) after the mixed air exchanges heat with the raw flue gas (the process is a third-stage preheating process or third heating and can be realized through the heat exchanger 6), the raw flue gas is purified (desulfurization and/or washing and can be realized through the desulfurization tower 16 and/or the washing tower) to become clean flue gas, the mixed air is heated to be hot air, one part of the hot air is used as circulating hot air, and the other part of the hot air is used as heating gas to be mixed with the clean flue gas.
When the method is implemented based on the device shown in fig. 1, the following is specifically described:
ambient air, namely cold air, enters the preheater 2 from the cold air inlet air duct 1, meanwhile, steam enters the preheater 2 from a heat source inlet pipeline 12 of the preheater 2, in the preheater 2, the steam is cooled to generate condensed water, and the condensed water is discharged from a heat source outlet pipeline 13 of the preheater; the primary preheating (first heating) of the ambient air results in preheated ambient air which enters the preheater outlet duct 3 where it is mixed with the hot air in the circulating duct 8 (second heating) resulting in mixed air at a re-increased temperature.
Under the suction of the air blower 4, the mixed air enters the air blower 4 and enters the heat exchanger 6 through the air blower outlet air duct 5, meanwhile, the raw flue gas enters the heat exchanger 6 through the flue gas duct 10, in the heat exchanger 6, the raw flue gas enters the purification tower (here, the desulfurization tower 16) through the heat exchanger outlet air duct 11 after being cooled, and the mixed air is heated for the third time to obtain hot air.
Then, the hot air enters the heat exchanger outlet air duct 7 and then is divided into two parts, one part enters the circulating air duct 8, and then is mixed with preheated ambient air at the preheater outlet air duct 3, so that the temperature of the ambient air is raised, and secondary heating is carried out; the other part enters a smoke mixer 15 arranged in a smoke channel of the chimney 14 through the heating air duct 9, so that the other part is mixed with the clean smoke, the temperature of the clean smoke is heated, and the aim of eliminating the trailing phenomenon of the white smoke is achieved.
Example 1
By adopting the method and the device for heating the flue gas, if the white smoke plume is visually eliminated by the wet flue gas discharged from the chimney, 150000Nm is needed3The/h smoke is heated from 45 ℃ to 65 ℃, and the goal of white elimination can be achieved when the smoke is discharged to the atmosphere.
Wherein, the heating process needs to heat the clean smoke from 45 ℃ to 65 ℃, the temperature of the large-flow smoke is raised to 20 ℃, the hot air and the smoke are mixed for heating, and about 36000Nm3The hot air (150 ℃) is mixed with the smoke gas to meet the process requirements and eliminate the colored smoke plume.
36000Nm are firstly sucked by the blower 43The/h of ambient air (-10 ℃) is introduced into the preheater 2, where it is preheated in a first stage by heat exchange with steam, heated to 20 ℃ and then mixed with the hot air in the circulation duct 8 (42000 Nm)3H, 150 ℃) to 90 ℃ to finish the second stage of preheating, and the obtained mixed air is 78000Nm3/h(90℃)。
Sending the mixed air into a heat exchanger 6 through a blower 4, and heating the mixed air from 90 ℃ to 150 ℃ through heat exchange with the raw flue gas to obtain hot air; meanwhile, the original smoke is reduced from 180 ℃ to 150 ℃.
The hot air obtained is divided into two portions, one portion (42000 Nm)3At 150 ℃ C./h, is circulated back to the preheater outlet flue 3 to mix with ambient air and another portion of the heated air (36000 Nm)3And/h, 150 ℃) is sent into a chimney at the top of the desulfurization tower through a heating air duct 9 to be directly mixed with clean flue gas (45 ℃) at 65 ℃.
The purified flue gas reduces the humidity while the temperature is raised, which is equivalent to further raising the degree of superheat, thereby eliminating white plume.
The specific effect analysis of the device and the method of the invention is as follows:
(1) ambient air is divided into three heating stages. The first stage is a steam (or other heat sources such as heating medium water) preheating stage, and a preheater is adopted for preheating; the second stage is a mixed air preheating stage, and hot air at the downstream of the mixing heat exchanger is used for preheating; the third stage is a heat exchange heating stage, and the heat of the original flue gas is utilized to heat air. The first stage preheating and the second stage preheating can complement each other, so that respective output force can be adjusted conveniently according to actual working conditions, the waste heat of the flue gas is utilized to the greatest extent, and the energy consumption is reduced.
(2) And a part of hot air after heat exchange with the high-temperature raw flue gas returns to the inlet of the blower and is mixed with the ambient air to achieve the effect of preheating the ambient air, and the heat of the raw flue gas is actually utilized in the second preheating stage. The other part enters a chimney to be mixed with the clean smoke, so that the aim of heating the smoke is fulfilled. The proportion of the two gases can be adjusted according to the actual working condition
(3) The flue gas reheating mode does not need to greatly change a desulfurizing tower and a chimney, and the engineering modification amount is small.
(4) The method and the device are simple, and the device has small overhaul workload.
(5) Can avoid the low temperature corrosion of the smoke-air heat exchanger.
It should be noted that the above preferred embodiments are only for illustrating the present invention, but the present invention is not limited to the above embodiments, and variations and modifications within the spirit of the present invention, which are made by those skilled in the art, are included in the protection scope of the present invention.
Claims (10)
1. Utilize device of flue gas waste heat elimination wet smoke plume, its characterized in that includes:
a mixing duct including an ambient air inlet, a hot air inlet, and a mixed air outlet;
the air blower comprises an air inlet end and an air outlet end, and the air inlet end is communicated with the mixed air outlet;
the heat exchanger comprises a flue gas inlet, a mixed air inlet, a heat exchange area, a flue gas outlet and a hot air outlet, the mixed air inlet is communicated with the air outlet end, the hot air outlet is communicated with a heat exchanger outlet air channel, the heat exchanger outlet air channel is respectively communicated with a circulating air channel and a heating air channel, the circulating air channel is communicated with the hot air inlet, and the flue gas outlet is communicated with the flue gas inlet of the purification tower;
the flue gas mixer is arranged in a flue gas channel in a chimney of the purification tower and comprises a flue gas inlet, a hot air inlet, a mixing area and a flue gas mixed gas outlet, and the hot air inlet is communicated with the hot air channel.
2. The device for eliminating the moisture smoke plume by using the waste heat of the smoke as claimed in claim 1, further comprising:
the preheater comprises a cold air inlet, a heat source inlet, a heat exchange zone, a preheated air outlet and a heat source outlet, and the preheated air outlet is communicated with the ambient air inlet.
3. The device for eliminating the wet smoke plume by using the residual heat of the flue gas as claimed in claim 2, wherein the heat source of the preheater is steam, hot water or hot oil.
4. The device for eliminating the moisture smoke plume by using the waste heat of the smoke as claimed in claim 1, wherein the heat exchanger is a tube bundle heat exchanger or a plate heat exchanger.
5. The device for eliminating the smoke plume through the waste heat of the smoke according to claim 1, wherein a flow regulator is arranged at the communication position of the heat exchanger outlet air duct and the circulating air duct, or a flow regulator is arranged at the communication position of the heat exchanger outlet air duct and the heating air duct.
6. The device for eliminating the moisture smoke plume by using the waste heat of the smoke as claimed in claim 1, wherein the purification tower is a desulfurization tower or a washing tower.
7. The method for eliminating and dehumidifying the smoke plume by using the waste heat of the smoke is characterized by comprising the following steps of:
s1, mixing and heating ambient air and circulating hot air to obtain mixed air;
and S2, after the mixed air exchanges heat with the raw flue gas, the cooled raw flue gas is purified to become clean flue gas, the heated mixed air becomes hot air, one part of the hot air is used as the circulating hot air, and the other part of the hot air is used as heating gas to be mixed with the clean flue gas.
8. The method for eliminating moisture plume by using flue gas waste heat as claimed in claim 7, further comprising the steps of:
in step S1, the ambient air is preheated by a heat source to be heated to be preheated ambient air, and the preheated ambient air is mixed with the circulated hot air to be heated.
9. The method for eliminating the wet smoke plume by using the residual heat of the smoke as claimed in claim 8, wherein the heat source is steam, hot water or hot oil.
10. The method for removing moisture plume by using flue gas waste heat as claimed in claim 7, wherein the purification is desulfurization and/or washing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911043380.6A CN112742154A (en) | 2019-10-29 | 2019-10-29 | Device and method for eliminating wet smoke plume by using waste heat of smoke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911043380.6A CN112742154A (en) | 2019-10-29 | 2019-10-29 | Device and method for eliminating wet smoke plume by using waste heat of smoke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112742154A true CN112742154A (en) | 2021-05-04 |
Family
ID=75640373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911043380.6A Pending CN112742154A (en) | 2019-10-29 | 2019-10-29 | Device and method for eliminating wet smoke plume by using waste heat of smoke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112742154A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58133514A (en) * | 1982-02-03 | 1983-08-09 | Kawasaki Heavy Ind Ltd | Method of heat exchange in wet type exhaust gas processing device |
| JPH1026335A (en) * | 1996-07-12 | 1998-01-27 | Hitachi Zosen Corp | White fuming preventing apparatus for refuse incinerator facility |
| JPH10235141A (en) * | 1997-02-24 | 1998-09-08 | Ishikawajima Harima Heavy Ind Co Ltd | Boiler exhaust gas treater |
| JP2000074359A (en) * | 1998-06-16 | 2000-03-14 | Abb Kk | Method and apparatus for processing dust incinerator waste gas |
| JP2004198090A (en) * | 2002-12-20 | 2004-07-15 | Jfe Engineering Kk | Combustion deodorizing method and combustion deodorizing device for waste dry exhaust gas |
| EP2918911A1 (en) * | 2014-03-14 | 2015-09-16 | Pyraine | Combustion process in thermal combustion plant and thermal combustion plant |
| CN107923610A (en) * | 2016-07-08 | 2018-04-17 | 傲华容客有限责任公司 | For improving the method and system of boiler availability |
| CN108534170A (en) * | 2018-03-30 | 2018-09-14 | 珠海市华远自动化科技有限公司 | A kind of boiler smoke wind blending heating regulating system and its control method |
| CN208599467U (en) * | 2018-06-26 | 2019-03-15 | 北京万信同和能源科技有限公司 | The processing equipment of coloured plume |
| CN210993575U (en) * | 2019-10-29 | 2020-07-14 | 北京万信同和能源科技有限公司 | Device for eliminating and dehumidifying smoke plume by using waste heat of smoke |
-
2019
- 2019-10-29 CN CN201911043380.6A patent/CN112742154A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58133514A (en) * | 1982-02-03 | 1983-08-09 | Kawasaki Heavy Ind Ltd | Method of heat exchange in wet type exhaust gas processing device |
| JPH1026335A (en) * | 1996-07-12 | 1998-01-27 | Hitachi Zosen Corp | White fuming preventing apparatus for refuse incinerator facility |
| JPH10235141A (en) * | 1997-02-24 | 1998-09-08 | Ishikawajima Harima Heavy Ind Co Ltd | Boiler exhaust gas treater |
| JP2000074359A (en) * | 1998-06-16 | 2000-03-14 | Abb Kk | Method and apparatus for processing dust incinerator waste gas |
| JP2004198090A (en) * | 2002-12-20 | 2004-07-15 | Jfe Engineering Kk | Combustion deodorizing method and combustion deodorizing device for waste dry exhaust gas |
| EP2918911A1 (en) * | 2014-03-14 | 2015-09-16 | Pyraine | Combustion process in thermal combustion plant and thermal combustion plant |
| CN107923610A (en) * | 2016-07-08 | 2018-04-17 | 傲华容客有限责任公司 | For improving the method and system of boiler availability |
| CN108534170A (en) * | 2018-03-30 | 2018-09-14 | 珠海市华远自动化科技有限公司 | A kind of boiler smoke wind blending heating regulating system and its control method |
| CN208599467U (en) * | 2018-06-26 | 2019-03-15 | 北京万信同和能源科技有限公司 | The processing equipment of coloured plume |
| CN210993575U (en) * | 2019-10-29 | 2020-07-14 | 北京万信同和能源科技有限公司 | Device for eliminating and dehumidifying smoke plume by using waste heat of smoke |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105688616B (en) | A kind of condensation of wet-method desulfurized fume takes off white equipment and process except haze | |
| CN108592068A (en) | A kind of waste heat using desulfurization slurry eliminates the system and technique that chimney emits white cigarette | |
| CN107014217B (en) | Coke oven gas utilization and flue gas treatment system of coking plant and treatment method thereof | |
| CN208599467U (en) | The processing equipment of coloured plume | |
| CN208704475U (en) | A kind of flue gas for coking industry wet desulphurization takes off white system | |
| CN109939556A (en) | The flue gas advanced purification system and its method that residual heat utilization-type plume is eliminated | |
| CN109539290B (en) | Boiler slag waste heat utilization system and process | |
| CN203848266U (en) | Recycling system for waste heat of flue gas of blast furnace gas boiler | |
| CN210993575U (en) | Device for eliminating and dehumidifying smoke plume by using waste heat of smoke | |
| CN109114840B (en) | Absorption heat pump treatment equipment | |
| CN108644794A (en) | A kind of improvement VOCs systems | |
| CN211694962U (en) | Coal fired power plant waste heat recovery utilizes and white system is disappears to flue gas | |
| CN210729109U (en) | Novel coal-fired power generation ultralow emission flue gas pollution control system | |
| CN112742154A (en) | Device and method for eliminating wet smoke plume by using waste heat of smoke | |
| CN212142066U (en) | High-temperature flue gas white elimination system | |
| CN207214097U (en) | A kind of coal-burning boiler based on smoke evacuation vapor internal-circulation type condensing units | |
| CN208332300U (en) | A kind of system emitting white cigarette using the waste heat elimination chimney of desulfurization slurry | |
| CN108518700A (en) | A kind of system and technique eliminated boiler and industrial furnace chimney and emit white cigarette | |
| CN210425078U (en) | Flue gas white elimination system | |
| CN208139315U (en) | A kind of system eliminated boiler and industrial furnace chimney and emit white cigarette | |
| CN210568527U (en) | Device for backheating and heating flue gas by using condensed water | |
| CN210891734U (en) | Wet flue gas desulfurization waste heat recovery and white elimination system | |
| CN209630899U (en) | The processing unit of wet misty rain after a kind of cement plant wet desulphurization | |
| CN210861164U (en) | Efficient boiler integration system | |
| CN210993740U (en) | Wet smoke plume treatment facility in scrubbing tower export |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |