CN109821330B - Flue gas treatment device and energy system - Google Patents
Flue gas treatment device and energy system Download PDFInfo
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- CN109821330B CN109821330B CN201910210675.1A CN201910210675A CN109821330B CN 109821330 B CN109821330 B CN 109821330B CN 201910210675 A CN201910210675 A CN 201910210675A CN 109821330 B CN109821330 B CN 109821330B
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- flue gas
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- water
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- 239000003546 flue gas Substances 0.000 title claims abstract description 310
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 309
- 239000007788 liquid Substances 0.000 claims abstract description 162
- 239000002918 waste heat Substances 0.000 claims abstract description 68
- 238000011084 recovery Methods 0.000 claims abstract description 53
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 38
- 230000023556 desulfurization Effects 0.000 claims abstract description 38
- 230000002087 whitening effect Effects 0.000 claims abstract description 32
- 238000004064 recycling Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 222
- 239000007921 spray Substances 0.000 claims description 44
- 239000000779 smoke Substances 0.000 claims description 27
- 238000001816 cooling Methods 0.000 claims description 24
- 238000010248 power generation Methods 0.000 claims description 19
- 230000003009 desulfurizing effect Effects 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 2
- 238000012546 transfer Methods 0.000 abstract description 14
- 239000003344 environmental pollutant Substances 0.000 abstract description 8
- 231100000719 pollutant Toxicity 0.000 abstract description 8
- 239000000428 dust Substances 0.000 abstract description 6
- 239000003570 air Substances 0.000 description 64
- 239000008239 natural water Substances 0.000 description 15
- 238000010438 heat treatment Methods 0.000 description 12
- 239000002002 slurry Substances 0.000 description 9
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 241000196171 Hydrodictyon reticulatum Species 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 150000003568 thioethers Chemical class 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Treating Waste Gases (AREA)
Abstract
The application provides a flue gas treatment device and an energy system, which are characterized in that flue gas dust removal, desulfurization, denitration, waste heat recovery and flue gas whitening are integrated, so that on one hand, the recycling of energy is realized, on the other hand, the pollutant content in the flue gas is reduced, and the pollution of the flue gas to the air of the natural environment is reduced. In detail, the flue gas treatment device comprises a flue gas desulfurization unit, a flue gas waste heat recovery unit and a flue gas whitening unit. The flue gas desulfurization unit carries out desulfurization treatment on the flue gas and then conveys the flue gas to the flue gas waste heat recovery unit. The flue gas waste heat recovery unit transfers heat in the flue gas after desulfurization treatment to the first liquid provided by the first liquid providing device, and conveys the flue gas after treatment to the flue gas whitening unit. The flue gas waste heat recovery unit further transfers heat in the first liquid to the second liquid provided by the second liquid providing device. The flue gas whitening unit performs whitening treatment on the flue gas treated by the flue gas waste heat recovery unit and then discharges the flue gas to the outside.
Description
Technical Field
The application relates to the technical field of energy, in particular to a flue gas treatment device and an energy system.
Background
The coal contains hydrogen and water, a large amount of water vapor is generated when the coal is combusted in a boiler, and the latent heat of the water vapor is often discharged into the atmosphere along with the flue gas, so that waste of flue gas waste heat is caused, and the flue gas waste heat accounts for about 10% of the low-level heat productivity of the coal. In the prior art, the utilization of the heat supply network backwater to recover the flue gas waste heat is a mature technology, but the heat supply network backwater temperature is higher, the sensible heat capacity of air is small, and the flue gas waste heat cannot be deeply recovered. The other widely applied technology is an air preheater, which can exchange heat with flue gas by utilizing low-temperature ambient air through a dividing wall type heat exchanger, but because the air side only has sensible heat change, the flue gas side has latent heat change, the specific heat capacity of the air side and the flue gas side are not matched, and the flue gas waste heat cannot be deeply recovered. The heat efficiency of the boiler can be improved by 3-5% by the two technologies, and a large amount of waste heat of flue gas is wasted.
On the other hand, the flue gas generated by the boiler combustion also contains a large amount of pollutants such as particulate matters, sulfur dioxide SO2, nitrogen oxides NO x and the like, and the direct discharge is easy to cause air pollution. In the prior art, a wet desulfurization method can be adopted to carry out desulfurization treatment on flue gas generated in a coal-fired boiler, but the common wet desulfurization can lead the coal-fired flue gas to generate a phenomenon of white smoke at a chimney mouth, the white smoke contains a large number of sulfate small liquid drops, the secondary pollution has great influence on the formation of haze, and air pollution can still be caused.
Disclosure of Invention
In view of the above, an objective of the embodiments of the present application is to provide a flue gas treatment device and an energy system for solving the above-mentioned problems.
In a first aspect, an embodiment of the present application provides a flue gas treatment device, where the flue gas treatment device includes a flue gas desulfurization unit, a flue gas waste heat recovery unit, and a flue gas whitening unit;
The flue gas desulfurization unit is communicated with the flue gas waste heat recovery unit, and is used for desulfurizing the flue gas in the flue gas desulfurization unit and conveying the desulfurized flue gas to the flue gas waste heat recovery unit;
The flue gas waste heat recovery unit is communicated with the first liquid supply device and is used for transferring heat in the flue gas after desulfurization treatment to the first liquid supplied by the first liquid supply device; the flue gas waste heat recovery unit is also communicated with a second liquid supply device and is used for transferring heat in the first liquid to the second liquid supplied by the second liquid supply device;
the flue gas whitening unit is communicated with the flue gas waste heat recovery unit and is used for whitening the flue gas treated by the flue gas waste heat recovery unit and discharging the flue gas to the outside.
Optionally, the device further comprises a first heat exchanger, wherein the first heat exchanger comprises a first flue gas inlet, a first flue gas outlet, a first air inlet and a first air outlet;
the flue gas desulfurization unit comprises a spray tower for desulfurizing flue gas, and the spray tower comprises a second flue gas inlet;
The first flue gas inlet is communicated with a second flue gas outlet of the flue gas generating device, the first flue gas outlet is communicated with the second flue gas inlet, the first heat exchanger is used for transferring heat in flue gas obtained through the second flue gas outlet and the first flue gas inlet to air introduced by the first air inlet, and the flue gas subjected to heat exchange is conveyed to the spray tower through the first flue gas outlet and the second flue gas inlet;
the first air outlet is communicated with the second air inlet of the smoke generating device, and the first heat exchanger is also used for conveying the air subjected to heat exchange to the smoke generating device through the first air outlet and the second air inlet.
Optionally, the flue gas waste heat recovery unit comprises a heat-moisture exchanger, a water processor and a second heat exchanger;
the heat-moisture exchanger comprises a first water inlet, a first water outlet and a third flue gas inlet; the water processor comprises a second water inlet and a second water outlet; the second heat exchanger comprises a third water inlet, a third air inlet and a second air outlet; the spray tower also comprises a third flue gas outlet;
The first water inlet is communicated with the first liquid providing device, the third flue gas inlet is communicated with the third flue gas outlet, and the heat-moisture exchanger is used for transferring heat in the flue gas after desulfurization treatment to the first liquid introduced by the first water inlet;
The first water outlet is communicated with the second water inlet, the second water outlet is communicated with the third water inlet, and the water processor is used for performing water quality treatment on the first liquid obtained through the first water outlet and the second water inlet and conveying the first liquid subjected to the water quality treatment to the second heat exchanger through the second water outlet and the third water inlet;
the third air inlet is communicated with the outside, the second air outlet is communicated with the first air inlet, and the second heat exchanger is used for transferring heat in the first liquid to air introduced from the outside through the third air inlet and conveying the air subjected to heat exchange to the first heat exchanger through the second air outlet and the first air inlet.
Optionally, the flue gas waste heat recovery unit further comprises a multi-stage electric heat pump;
The multistage electric heating pump comprises a first cold source inlet, a first cold source outlet, a first heat source inlet and a first heat source outlet; the water processor further comprises a third water outlet; the second heat exchanger further comprises a fourth water outlet;
The first heat source inlet is communicated with the third water outlet and the fourth water outlet, the first heat source inlet is communicated with the fifth water outlet of the second liquid providing device, the first heat source outlet is communicated with the fourth water inlet of the second liquid providing device, and the multistage electric heat pump is used for transferring heat in first liquid obtained through the third water outlet, the fourth water outlet and the first heat source inlet to second liquid obtained through the fifth water outlet and the first heat source inlet and conveying the second liquid subjected to heat exchange to the second liquid providing device through the first heat source outlet and the fourth water inlet.
Optionally, the flue gas waste heat recovery unit further comprises a third heat exchanger;
The third heat exchanger comprises a second heat source inlet, a second heat source outlet, a second cold source inlet and a second cold source outlet;
The second heat source inlet is communicated with the third water outlet and the fourth water outlet, the second cold source inlet is communicated with the fifth water outlet, the second cold source outlet is communicated with the fourth water inlet, the third heat exchanger is used for transferring heat in the first liquid obtained through the third water outlet, the fourth water outlet and the second heat source inlet to the second liquid obtained through the fifth water outlet and the second cold source inlet, and conveying the second liquid subjected to heat exchange to the second liquid providing device through the second cold source outlet and the fourth water inlet.
Optionally, the flue gas waste heat recovery unit further comprises a cooling tower;
The cooling tower comprises a fifth water inlet and a sixth water outlet;
the fifth water inlet is communicated with the first cold source outlet or the second heat source outlet, and the cooling tower is used for storing first liquid obtained through the first cold source outlet or the second heat source outlet and the fifth water inlet;
the sixth water outlet is communicated with the first water inlet, and the heat-moisture exchanger is further used for obtaining the first liquid stored in the cooling tower through the sixth water outlet and the first water inlet so as to realize the recycling of the first liquid.
Optionally, the flue gas whitening unit comprises a fourth heat exchanger;
The fourth heat exchanger comprises a fourth flue gas inlet, a fifth flue gas outlet, a sixth water inlet and a sixth water outlet; the heat-moisture exchanger further comprises a fourth flue gas outlet;
the fourth flue gas inlet is communicated with the fourth flue gas outlet, the sixth water inlet is communicated with the first heat source outlet or the second cold source outlet, the sixth water outlet is communicated with the first heat source inlet or the second cold source inlet, and the fourth heat exchanger is used for carrying out heat exchange on first liquid obtained through the first heat source outlet or the second cold source outlet and the sixth water inlet and flue gas obtained through the fourth flue gas outlet and the fourth flue gas inlet so as to carry out whitening treatment on the obtained flue gas;
The fourth heat exchanger is also used for discharging the flue gas subjected to the whitening treatment to the outside through the fifth flue gas outlet.
Optionally, the spray tower further comprises a seventh water inlet;
The seventh water inlet is communicated with the first water outlet, and the heat-moisture exchanger is further used for conveying the first liquid subjected to heat exchange to the spray tower through the first water outlet and the seventh water inlet so as to supplement the desulfurization liquid in the spray tower.
Optionally, the device further comprises a wind power generation unit and a photovoltaic power generation unit;
The wind power generation is electrically connected with the multi-stage electric heat pump and is used for converting wind energy into electric energy and supplying the electric energy converted from the wind energy to the multi-stage electric heat pump;
The photovoltaic power generation unit is electrically connected with the multi-stage electric heat pump and is used for converting light energy into electric energy and supplying the electric energy converted by the light energy to the multi-stage electric heat pump.
In a second aspect, embodiments per se also provide an energy system comprising a flue gas treatment device as described above.
Compared with the prior art, the application has the following beneficial effects:
According to the flue gas treatment device and the energy system provided by the embodiment of the application, the flue gas is subjected to desulfurization treatment through the flue gas desulfurization unit, so that the contents of sulfides and smoke dust in the flue gas are reduced; the flue gas waste heat recovery unit fully utilizes the cold source provided by the first liquid providing device to condense and recover water vapor in the flue gas, and is used for heating the second liquid provided by the second liquid providing device to deeply recover the flue gas waste heat and fully utilize the recovered flue gas waste heat; the moisture content in the smoke is reduced by the smoke whitening unit, and the generation of white smoke is reduced. The flue gas treatment device combines flue gas dust removal, desulfurization, denitration, waste heat recovery and flue gas whitening into a whole, so that the flue gas temperature, moisture content and pollutant content are obviously reduced, the whitening effect is achieved, and the technical problems that a large amount of flue gas waste heat is wasted and the 'white smoke' phenomenon in the prior art is effectively relieved. On one hand, the recycling of energy and water resources is realized, and on the other hand, the pollutant content in the flue gas is reduced, and the pollution of the flue gas to the air of the natural environment is reduced.
Drawings
For a clearer description of the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and should not be considered limiting the scope, and that other related drawings can be obtained according to these drawings without the inventive effort for a person skilled in the art.
FIG. 1 is a schematic block diagram of a flue gas treatment device according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a flue gas treatment device according to an embodiment of the present application;
FIG. 3 is a second schematic diagram of a flue gas treatment device according to an embodiment of the present application;
FIG. 4 is a third schematic diagram of a flue gas treatment device according to an embodiment of the present application;
fig. 5 is a schematic diagram of a flue gas treatment device according to an embodiment of the present application.
Icon: 100-a flue gas treatment device; 110-a flue gas desulfurization unit; 111-a spray tower; 120-a flue gas waste heat recovery unit; 121-a first heat exchanger; 122-heat-moisture exchanger; 123-a water treatment device; 124-a second heat exchanger; 125-multistage electric heat pump; 126-a third heat exchanger; 127-cooling tower; 130-a smoke whitening unit; 131-fourth heat exchanger; 140-a wind power generation unit; 150-a photovoltaic power generation unit; 200-a first liquid supply; 300-a second liquid supply; 400-flue gas generating device.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that, the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that is commonly put in use of the product of the application, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present application.
In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In order to overcome the problems of the prior art described above, the applicant has studied to provide the solutions given in the following specific examples.
Referring to fig. 1 and fig. 2 in combination, fig. 1 is a block schematic diagram of a flue gas treatment device 100 according to an embodiment of the present application, and fig. 2 is a schematic diagram of a structure of the flue gas treatment device 100 according to an embodiment of the present application. The flue gas treatment device 100 will be described in detail below.
As shown in fig. 1, the flue gas treatment device 100 includes a flue gas desulfurization unit 110, a flue gas waste heat recovery unit 120, and a flue gas whitening unit 130.
The flue gas desulfurization unit 110 is communicated with the flue gas waste heat recovery unit 120, and the flue gas desulfurization unit 110 is used for desulfurizing the flue gas in the flue gas desulfurization unit 110 and conveying the desulfurized flue gas to the flue gas waste heat recovery unit 120.
The flue gas waste heat recovery unit 120 is in communication with the first liquid supply device 200, and is configured to transfer heat in the flue gas after desulfurization treatment to the first liquid supplied by the first liquid supply device 200. The flue gas waste heat recovery unit 120 is also in communication with the second liquid supply device 300 for transferring heat from the first liquid to the second liquid supplied by the second liquid supply device 300.
The flue gas whitening unit 130 is communicated with the flue gas waste heat recovery unit 120, and is configured to perform whitening treatment on the flue gas treated by the flue gas waste heat recovery unit 120 and discharge the flue gas to the outside.
The first liquid supply device 200 may be an external water storage device such as a water storage tank and a reservoir, or a natural water source such as a reservoir, a pond, a river, etc., and the first liquid may be natural cold source water introduced from the external water storage device or the natural water source such as the reservoir, the pond, the river, etc. The second liquid supply 300 may be a user-heated mains and the second liquid may be user-heated mains water. The flue gas is sequentially treated by the flue gas desulfurization unit 110, the flue gas waste heat recovery unit 120 and the flue gas whitening unit 130 and then discharged to the outside, so that the heat in the flue gas can be recovered, the content of smoke dust and pollutants in the flue gas is reduced, and the pollution to the surrounding environment is reduced. And moreover, the outdoor natural cold source resources are rich in winter, the flue gas waste heat is deeply recovered by utilizing the natural cold source, meanwhile, the water in the flue gas is recycled, and the recovered heat is used for heating the water of the user heat supply network so as to supply heat to the user heat supply network.
As shown in fig. 2, the flue gas desulfurization unit 110 includes a spray tower 111 for desulfurizing the flue gas. The flue gas waste heat recovery unit 120 comprises a first heat exchanger 121. The flue gas treatment device 100 further comprises pipelines L1 to L25 for connecting the components of the flue gas treatment device 100.
Optionally, the first heat exchanger 121 includes a first flue gas inlet, a first flue gas outlet, a first air inlet, and a first air outlet, and the spray tower 111 includes a second flue gas inlet. The first flue gas inlet is communicated with a second flue gas outlet of the flue gas generating device 400 through a pipeline L3. The first flue gas outlet is communicated with the second flue gas inlet through a pipeline L4. The first heat exchanger 121 is configured to transfer heat in the flue gas obtained through the second flue gas outlet and the first flue gas inlet to air introduced by the first air inlet, and transfer the heat exchanged flue gas to the spray tower 111 through the first flue gas outlet and the second flue gas inlet.
The first air outlet communicates with a second air inlet of the flue gas generating device 400 via a line L2. The first heat exchanger 121 is further configured to convey the heat exchanged air to the flue gas generating device 400 through the first air outlet and the second air inlet.
The flue gas in the flue gas generating device 400 is conveyed into the first heat exchanger 121 through a pipeline L3, and exchanges heat with the air introduced through the pipeline L1. Because a large amount of heat is contained in the flue gas, after heat exchange is carried out with air, part of the heat is transferred to the air with relatively low temperature, so that the temperature of the air is raised. The heated air is conveyed to the smoke generating device 400 through the pipeline L2 to support combustion, so that the energy consumed by combustion in the smoke generating device 400 is reduced to a certain extent, and part of waste heat in the smoke is recycled. The flue gas after heat exchange is conveyed to the spray tower 111 through a pipeline L4.
Optionally, the first heat exchanger 121 is a flue gas-air heat exchanger, for enabling indirect heat exchange between flue gas and air. The flue gas generating apparatus 400 may be a coal-fired boiler.
As an alternative embodiment, the spray tower 111 includes a slurry tank and a spray header, the slurry tank is disposed at the bottom of the spray tower 111, the spray header is disposed at the top of the spray tower 111, and the spray header is communicated with the slurry tank through a pipeline L7. Wherein, the slurry pond stores spray slurry containing desulfurizing agent, and the spray slurry in the slurry pond is pumped to the spray header by a water pump arranged on the pipeline L7 to spray and desulfurize the flue gas in the spray tower 111. And the sprayed slurry falls into the slurry pool again to realize cyclic spraying. The spray tower 111 may take the form of a packed tower, an air spray tower, a tray tower, etc.
Optionally, the flue gas waste heat recovery unit 120 further comprises a heat-moisture exchanger 122.
The heat and humidity exchanger 122 includes a first water inlet and a third flue gas inlet. The first water inlet is communicated with the first liquid supply device 200 through a pipeline L6, and the third flue gas inlet is communicated with the third flue gas outlet through a hood a. The heat-moisture exchanger 122 is used for transferring heat in the flue gas after desulfurization treatment to the first liquid introduced from the first water inlet. From the spray tower 111, the flue gas enters the heat-moisture exchanger 122 through the hood a, heat exchange occurs between the heat-moisture exchanger 122 and the first liquid introduced by the pipeline L6, and heat in the flue gas is transferred to the first liquid and further recovered.
The heat and humidity exchanger 122 further includes a first water outlet, and the spray tower 111 further includes a seventh water inlet. The first water outlet is communicated with the seventh water inlet through a pipeline L8, and the seventh water inlet is communicated with a spray header of the spray tower 111. The heat-humidity exchanger 122 is further configured to send a portion of the first liquid after heat exchange to the spray tower 111, so as to supplement the desulfurization solution in the spray tower 111. As an alternative embodiment, a dosing port for adding desulfurizing agent may be further provided at the seventh water inlet.
The heat-moisture exchanger 122 may further be provided with a spray pipe, an inlet of the spray pipe is communicated with the first water inlet, a dosing port may be provided at an inlet of the spray pipe, and a denitration agent is added into the first liquid through the dosing port, so that the flue gas in the heat-moisture exchanger 122 is subjected to denitration treatment while heat exchange, and effects of neutralizing acidity of a solution and reducing emission of NO x are achieved.
A first overflow port may be further provided in the heat-humidity exchanger 122, and when the level of the first liquid in the heat-humidity exchanger 122 exceeds the position of the first overflow port, the first liquid in the heat-humidity exchanger 122 is discharged through the first overflow port.
Alternatively, the heat and humidity exchanger 122 may employ a direct contact heat exchanger or an indirect contact heat exchanger, such as a cross-flow heat exchanger, a counter-flow heat exchanger, or a concurrent heat exchanger. When the heat and moisture exchanger 122 is a direct contact heat exchanger, the direct contact heat exchanger may be a cavity structure heat exchanger or a packing structure heat exchanger. Wherein, cavity structure heat exchanger distributes liquid through spraying mechanism, and packing structure heat exchanger distributes liquid through spraying mechanism or drenching a set mechanism.
Optionally, the flue gas waste heat recovery unit 120 further includes a water processor 123 and a second heat exchanger 124.
The water processor 123 includes a second water inlet and a second water outlet, and the second heat exchanger 124 includes a third water inlet. The second water inlet is communicated with the first water outlet of the heat-humidity exchanger 122 through a pipeline L8, and the second water outlet is communicated with the third water inlet through a pipeline L9. The water processor 123 is configured to perform water quality treatment on the first liquid obtained through the first water outlet and the second water inlet, and convey the first liquid after water quality treatment to the second heat exchanger 124 through the second water outlet and the third water inlet. After exchanging heat with the flue gas in the heat-humidity exchanger 122, the first liquid enters the water processor 123 through a pipeline L8, water quality treatment is performed in the water processor 123, and a part of the treated first liquid enters the second heat exchanger 124 through a pipeline L9.
The water processor 123 is also in communication with the first overflow port of the heat and moisture exchanger 122 via a line L19, for receiving the first liquid discharged from the heat and moisture exchanger 122 via the first overflow port and the line L19, and for performing a water treatment on the first liquid obtained via the line L19.
Optionally, the water processor 123 includes, but is not limited to, a plurality of treatment tanks such as a sedimentation tank, a filtration tank, a neutralization tank, etc., and performs water quality treatment in various manners such as impurity sedimentation, filtration, acid-base neutralization, etc., on the first liquid, so as to achieve the purposes of purifying water quality and protecting environment.
The second heat exchanger 124 further includes a third air inlet and a second air outlet, and the spray tower 111 further includes a third flue gas outlet. The third air inlet is communicated with the outside through a pipeline L0, and the second air outlet is communicated with the first air inlet of the first heat exchanger 121 through a pipeline L1. The second heat exchanger 124 is configured to transfer heat in the first liquid to air introduced from the outside through the third air inlet, and transfer the heat-exchanged air to the first heat exchanger 121 through the second air outlet and the first air inlet. The external air enters the second heat exchanger 124 through the pipeline L0, exchanges heat with the first liquid entering the second heat exchanger 124 through the pipeline L9, and the heat in the first liquid is transferred to the air to heat the air, and the heated air is conveyed to the first heat exchanger 121 through the pipeline L1.
Alternatively, the second heat exchanger 124 may be a water-air heat exchanger for enabling the air in the second heat exchanger 124 and the first liquid to exchange heat without direct contact.
Optionally, the flue gas waste heat recovery unit 120 further comprises a multi-stage electric heat pump 125.
The multi-stage electric heat pump 125 includes a first cold source inlet, a first cold source outlet, a first heat source inlet, and a first heat source outlet. The water processor 123 further includes a third water outlet, and the second heat exchanger 124 further includes a fourth water outlet. The first cold source inlet is communicated with the third water outlet through a pipeline L11 and is communicated with the fourth water outlet through a pipeline L10; the first heat source inlet is communicated with a fifth water outlet of the second liquid supply device 300 through a pipeline L14; the first heat source outlet communicates with the fourth water inlet of the second liquid supply apparatus 300 through a line L15. The multi-stage electric heat pump 125 is configured to transfer heat in the first liquid obtained through the third water outlet, the fourth water outlet, and the first cold source inlet to the second liquid obtained through the fifth water outlet and the first heat source inlet, and transfer the heat exchanged second liquid to the second liquid providing device 300 through the first heat source outlet and the fourth water inlet.
The first liquid in the water processor 123 enters the multi-stage electric heat pump 125 through a pipeline L11, and the first liquid in the second heat exchanger 124 enters the multi-stage electric heat pump 125 through a pipeline L10. The second liquid supplied from the second liquid supply device 300 enters the multistage electric heat pump 125 through a line L14. The multi-stage electric heat pump 125 extracts heat from the first liquid by using electric energy, transfers the extracted heat from the first liquid and heat generated by electric energy consumption to the second liquid, heats the second liquid, returns the heated second liquid to the user heat supply network through a pipeline L15, and provides hot water to the user heat supply network.
As an alternative embodiment, the multi-stage electric heat pump 125 includes a plurality of electric heat pumps from stage 1 to stage N. The first cold source inlet is a cold source inlet of the 1 st-stage electric heat pump. Starting from the 1 st stage electric heat pump, the cold source outlet of each stage electric heat pump is communicated with the cold source inlet of the adjacent next stage electric heat pump until the N-1 st stage electric heat pump. And the cold source outlet of the Nth-stage electric heat pump is the first cold source outlet. The first heat source inlet is the heat source inlet of the Nth-stage electric heat pump. Starting from the Nth stage electric heat pump, the heat source outlet of each stage of electric heat pump is communicated with the heat source inlet of the adjacent previous stage of electric heat pump until the 2 nd stage of electric heat pump. The heat source outlet of the 1 st-stage electric heat pump is the first heat source outlet. The first liquid enters the 1 st stage electric heat pump from the first cold source inlet, the heat is pumped by the 1 st stage electric heat pump and then enters the 2 nd stage electric heat pump, and the rest heat in the first liquid is deeply recovered through N times of energy pumping of the N stages of electric heat pumps. The second liquid enters the N-stage electric heat pump from the first heat source inlet, enters the N-1 stage electric heat pump after being heated for the first time in the N-stage electric heat pump, and the second liquid is returned to the user heat network through the first heat source outlet after being heated for N times by the N-stage electric heat pump.
Optionally, the flue gas waste heat recovery unit 120 further comprises a third heat exchanger 126.
The third heat exchanger 126 includes a second heat source inlet, a second heat source outlet, a second heat sink inlet, and a second heat sink outlet. The second heat source inlet is communicated with the third water outlet of the water processor 123 through a pipeline L20 and is communicated with the fourth water outlet of the second heat exchanger 124 through a pipeline L21; the second cold source inlet is communicated with a fifth water outlet of the second liquid supply device 300 through a pipeline L23; the second cold source outlet is communicated with the fourth water inlet of the second liquid supply device 300 through a pipeline L24. The third heat exchanger 126 is configured to transfer heat in the first liquid obtained through the third water outlet, the fourth water outlet, and the second heat source inlet to the second liquid obtained through the fifth water outlet and the second heat source inlet, and transfer the heat-exchanged second liquid to the second liquid providing device 300 through the second heat source outlet and the fourth water inlet.
The first liquid in the water processor 123 enters the third heat exchanger 126 through a pipeline L20, and the first liquid in the second heat exchanger 124 enters the third heat exchanger 126 through a pipeline L21. The second liquid supplied from the second liquid supply device 300 enters the third heat exchanger 126 through a line L23. The first liquid exchanges heat with the second liquid in the third heat exchanger 126, and the heat in the first liquid is transferred to the second liquid to heat the second liquid. The heated second liquid is returned to the consumer heat supply network via line L24 to provide heated water to the consumer heat supply network.
Alternatively, the third heat exchanger 126 may be a water-water heat exchanger for indirect contact heat exchange between the first liquid and the second liquid.
Optionally, the flue gas waste heat recovery unit 120 further comprises a cooling tower 127.
The cooling tower 127 includes a fifth water inlet that communicates with the first heat source outlet of the multi-stage electric heat pump 125 via line L12 and with the second heat source outlet of the third heat exchanger 126 via line L22. The cooling tower 127 is used for storing the first liquid obtained through the first cold source outlet, the second heat source outlet and the fifth water inlet.
The first liquid is introduced into the cooling tower 127 through the pipeline L12 after heat is extracted from the multi-stage electric heat pump 125, or introduced into the cooling tower 127 through the pipeline L22 after heat exchange and temperature reduction are performed between the first liquid and the second liquid in the third heat exchanger 126, and the first liquid stored in the cooling tower 127 is contacted with the outside air to perform natural heat exchange.
The cooling tower 127 further includes a sixth water outlet in communication with the first water inlet of the heat and humidity exchanger 122 via a line L13. The heat-humidity exchanger 122 is further configured to obtain the first liquid stored in the cooling tower 127 through the sixth water outlet and the first water inlet, so as to implement recycling of the first liquid.
After being naturally cooled, the first liquid stored in the cooling tower 127 is conveyed to the heat-humidity exchanger 122 through a pipeline L13, and enters the next flue gas waste heat recovery cycle together with the supplementary natural cold source. It will be appreciated that the first liquid stored in the cooling tower 127 may also be used for other water supplies, such as domestic water, industrial process water, and the like.
Optionally, the flue gas whitening unit 130 comprises a fourth heat exchanger 131.
The fourth heat exchanger 131 includes a fourth flue gas inlet, a sixth water inlet, and a sixth water outlet. The heat and humidity exchanger 122 further comprises a fourth flue gas outlet. The fourth flue gas inlet is communicated with the fourth flue gas outlet through a hood b; the sixth water inlet is communicated with a pipeline L15 of the first heat source outlet through a pipeline L16, or is communicated with a pipeline L24 of the second heat source outlet through a pipeline L16; the sixth water outlet is communicated with a pipeline L14 of the first heat source inlet through a pipeline L17, or is communicated with a pipeline L23 of the second cold source inlet through a pipeline L17. Optionally, the sixth water inlet may also be connected to a cold source outlet of any one of the multi-stage electric heat pumps 125 through a pipeline L16. The fourth heat exchanger 131 is configured to perform heat exchange between the first liquid obtained through the first heat source outlet or the second heat source outlet, and the sixth water inlet, and the flue gas obtained through the fourth flue gas outlet and the fourth flue gas inlet, so as to perform whitening treatment on the obtained flue gas.
The second liquid heated in the multi-stage electric heat pump 125 or the third heat exchanger 126 enters the fourth heat exchanger 131 through a line L16. In addition, the flue gas is sent from the heat-humidity exchanger 122 to the fourth heat exchanger 131 through the hood b, and exchanges heat with the second liquid in the fourth heat exchanger 131. The flue gas obtains the heat transferred by the second liquid, is heated by sensible heat to be far away from a saturation line, so that the water vapor content in the flue gas is in an unsaturated state, and the relative humidity is reduced, thereby reducing the phenomenon of generating white smoke when the flue gas is discharged to the outside, and realizing the effect of whitening the flue gas.
The fourth heat exchanger 131 further includes a fifth flue gas outlet, and the fifth flue gas outlet is communicated with the outside through a pipeline L5. The fourth heat exchanger 131 is further configured to discharge the flue gas after the whitening treatment to the outside through the fifth flue gas outlet.
Optionally, the fourth heat exchanger 131 may be further provided with a second overflow port, which is connected to the water treatment device 123 via a line L18. The fourth heat exchanger 131 may generate condensed water when the flue gas is whitened, and when the liquid level of the condensed water generated in the fourth heat exchanger 131 exceeds the position of the second overflow port, the condensed water in the fourth heat exchanger 131 may be discharged to the water processor 123 through the second overflow port and the pipeline L18.
Optionally, the fourth heat exchanger 131 is a flue gas-water dividing wall type heat exchanger, and the flue gas-water dividing wall type heat exchanger may be a cross flow heat exchanger or a counter flow heat exchanger.
Referring to fig. 2 again, optionally, the flue gas treatment device 100 further includes a wind power generation unit 140 and a photovoltaic power generation unit 150.
The wind power generation unit 140 is electrically connected to the multi-stage electric heat pump 125, and is configured to convert wind energy into electric energy and provide the electric energy converted from the wind energy to the multi-stage electric heat pump 125. Alternatively, the wind power generation unit 140 may be a wind power generator.
The photovoltaic power generation unit 150 is electrically connected to the multi-stage electric heat pump 125, and is configured to convert light energy into electric energy and provide the electric energy converted from the light energy to the multi-stage electric heat pump 125. Alternatively, the photovoltaic power generation unit 150 may be a solar power generation device, such as a solar panel, or the like.
In this embodiment, as an alternative implementation manner, the spray tower 111, the heat-humidity exchanger 122 and the fourth heat exchanger 131 are jointly disposed in an energy tower, where the spray tower 111 is disposed at the bottommost part of the energy tower, the heat-humidity exchanger 122 is centered, the fourth heat exchanger 131 is disposed at the topmost part of the energy tower, and the three are sequentially communicated to form a flue gas channel. The wind power generation unit 140 may be disposed at the top end outside the energy tower. The photovoltaic power generation unit 150 may be disposed on a light receiving surface of the energy tower, for example, a tower top or an outer wall of the energy tower.
Referring to fig. 3, as an alternative embodiment, the flue gas waste heat recovery unit 120 of the flue gas treatment device 100 includes a first heat exchanger 121, a heat-humidity exchanger 122, a water processor 123, a second heat exchanger 124, a multi-stage electric heat pump 125, and a cooling tower 127. In this embodiment, low-temperature natural water sources from rivers, lakes and the like can be adopted to enter the heat-humidity exchanger 122 to cool the flue gas, and the low-temperature natural water sources are heated and then sequentially enter the water processor 123, the second heat exchanger 124 and the multi-stage electric heat pump 125. The second heat exchanger 124 transfers heat from the natural water source to the air. Further, as a cold source of the multi-stage electric heat pump 125, heat in a natural water source is extracted by the electric energy of the multi-stage electric heat pump 125 and transferred to the heat supply network for backwater. The natural water source enters the cooling tower 127 after being cooled in the multi-stage electric heat pump 125, and enters the heat-humidity exchanger 122 together with the supplementary natural water source for the next flue gas waste heat recovery cycle.
The flue gas treatment device 100 in the present embodiment can be applied to heating seasons, such as winter. In the heating season, the user heat supply network needs hot water with higher temperature (for example, 90-95 ℃) as a heat source for heating, and the multistage electric heat pump 125 is used for extracting heat in the first liquid through electric energy to heat the second liquid, so that the utilization rate of the flue gas waste heat recovered by the first liquid is improved.
Referring to fig. 4, as another alternative embodiment, the flue gas waste heat recovery unit 120 of the flue gas treatment device 100 includes a first heat exchanger 121, a heat-humidity exchanger 122, a water processor 123, a second heat exchanger 124, a third heat exchanger 126, and a cooling tower 127. In this embodiment, the low-temperature natural water source from the river, the lake, etc. may be used to enter the heat-humidity exchanger 122 to cool the flue gas, and the low-temperature natural water source is heated and then enters the water processor 123, the second heat exchanger 124, and the third heat exchanger 126 in sequence. The second heat exchanger 124 transfers heat from the natural water source to the air. Further, as the heat source of the third heat exchanger 126, the heat in the natural water source is transferred to the heat supply network backwater through the third heat exchanger 126. The natural water source enters the cooling tower 127 after heat exchange and temperature reduction, and enters the heat-humidity exchanger 122 together with the supplementary natural water source for the next flue gas waste heat recovery cycle.
The flue gas treatment device 100 according to the present embodiment can be applied to non-heating seasons, such as spring and summer. The user heat supply network in non-heating season does not need hot water with high temperature as a heat source, and the third heat exchanger 126 is adopted to enable the first liquid and the second liquid to exchange heat so as to meet the water temperature requirement of the heat supply network. It is understood that the second liquid supply apparatus 300 in a non-heating season may be a domestic water net or an industrial water net.
Referring to fig. 2 again, in combination with fig. 5, as a further alternative embodiment, the flue gas waste heat recovery unit 120 of the flue gas treatment device 100 includes a first heat exchanger 121, a heat-humidity exchanger 122, a water processor 123, a second heat exchanger 124, a multi-stage electric heat pump 125, a third heat exchanger 126, and a cooling tower 127. The flue gas treatment device 100 further comprises a plurality of detectors, such as the detectors S0-S22 shown in fig. 5. The monitors are used for detecting various information on the pipelines respectively. For liquid, the device can be used for detecting the information such as the water temperature, the water quality, the flow rate, the pressure intensity and the like of the liquid; for air, the device can be used for detecting temperature, humidity, flow rate, pressure and other information; the flue gas can be used for detecting information such as temperature, humidity, flow rate, pressure intensity, smoke particulate matter concentration, oxynitride concentration, sulfur dioxide concentration and the like.
In this embodiment, a valve (not shown) is further provided on each pipe. The opening and closing states of the valves on the respective pipelines can be controlled according to various information or data of the flue gas, air, liquid and the like in the respective pipelines detected by the respective detectors, so as to control the operation of the flue gas treatment device 100. The flue gas treatment device 100 can be in an operation mode other than heating season or an operation mode in heating season by controlling the valve according to actual conditions. For example, a plurality of monitoring points such as the temperature, the humidity, the flow rate, the smoke particulate matters, the nitrogen oxide and sulfur dioxide concentration and the like of a natural water source, the backwater of a heating network and the smoke are arranged at key points of each part, and the thermal parameters of the water, the air and the smoke and the emission parameters of the smoke pollutants are controlled by utilizing a plurality of monitoring indexes to guide the operation of all year round and all variable working conditions.
It should be noted that, in the above embodiments, the connection relationship and the function between the units of the flue gas treatment device 100 are similar to those described above in connection with fig. 1 and 2, and reference may be made to the foregoing description.
The embodiment of the application also provides an energy system comprising the flue gas treatment device 100 described in the above embodiment.
In summary, according to the flue gas treatment device and the energy system provided by the embodiment of the application, the flue gas is subjected to desulfurization treatment through the flue gas desulfurization unit, so that the contents of sulfides and smoke dust in the flue gas are reduced; the flue gas waste heat recovery unit fully utilizes the cold source provided by the first liquid providing device to condense and recover water vapor in the flue gas, and is used for heating the second liquid provided by the second liquid providing device to deeply recover the flue gas waste heat and fully utilize the recovered flue gas waste heat; the moisture content in the smoke is reduced by the smoke whitening unit, and the generation of white smoke is reduced. The flue gas treatment device combines flue gas dust removal, desulfurization, denitration, waste heat recovery and flue gas whitening into a whole, so that the flue gas temperature, moisture content and pollutant content are obviously reduced, the whitening effect is achieved, and the technical problems that a large amount of flue gas waste heat is wasted and the 'white smoke' phenomenon in the prior art is effectively relieved. On one hand, the recycling of energy and water resources is realized, and on the other hand, the pollutant content in the flue gas is reduced, and the pollution of the flue gas to the air of the natural environment is reduced.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions, and are not to be construed as indicating or implying a relative importance of the referenced content.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (7)
1. The flue gas treatment device is characterized by comprising a flue gas desulfurization unit, a flue gas waste heat recovery unit and a flue gas whitening unit;
The flue gas desulfurization unit is communicated with the flue gas waste heat recovery unit, and is used for desulfurizing the flue gas in the flue gas desulfurization unit and conveying the desulfurized flue gas to the flue gas waste heat recovery unit;
The flue gas waste heat recovery unit is communicated with the first liquid supply device and is used for transferring heat in the flue gas after desulfurization treatment to the first liquid supplied by the first liquid supply device; the flue gas waste heat recovery unit is also communicated with a second liquid supply device and is used for transferring heat in the first liquid to the second liquid supplied by the second liquid supply device;
the flue gas whitening unit is communicated with the flue gas waste heat recovery unit and is used for whitening the flue gas treated by the flue gas waste heat recovery unit and discharging the flue gas to the outside;
The device also comprises a first heat exchanger, wherein the first heat exchanger comprises a first flue gas inlet, a first flue gas outlet, a first air inlet and a first air outlet;
the flue gas desulfurization unit comprises a spray tower for desulfurizing flue gas, and the spray tower comprises a second flue gas inlet;
The first flue gas inlet is communicated with a second flue gas outlet of the flue gas generating device, the first flue gas outlet is communicated with the second flue gas inlet, the first heat exchanger is used for transferring heat in flue gas obtained through the second flue gas outlet and the first flue gas inlet to air introduced by the first air inlet, and the flue gas subjected to heat exchange is conveyed to the spray tower through the first flue gas outlet and the second flue gas inlet;
the first air outlet is communicated with a second air inlet of the smoke generating device, and the first heat exchanger is also used for conveying the air subjected to heat exchange to the smoke generating device through the first air outlet and the second air inlet;
the flue gas waste heat recovery unit comprises a heat-moisture exchanger, a water processor and a second heat exchanger;
the heat-moisture exchanger comprises a first water inlet, a first water outlet and a third flue gas inlet; the water processor comprises a second water inlet and a second water outlet; the second heat exchanger comprises a third water inlet, a third air inlet and a second air outlet; the spray tower also comprises a third flue gas outlet;
The first water inlet is communicated with the first liquid providing device, the third flue gas inlet is communicated with the third flue gas outlet, and the heat-moisture exchanger is used for transferring heat in the flue gas after desulfurization treatment to the first liquid introduced by the first water inlet;
The first water outlet is communicated with the second water inlet, the second water outlet is communicated with the third water inlet, and the water processor is used for performing water quality treatment on the first liquid obtained through the first water outlet and the second water inlet and conveying the first liquid subjected to the water quality treatment to the second heat exchanger through the second water outlet and the third water inlet;
the second heat exchanger is used for transferring heat in the first liquid to air introduced from the outside through the third air inlet and conveying the air subjected to heat exchange to the first heat exchanger through the second air outlet and the first air inlet;
the flue gas waste heat recovery unit further comprises a multi-stage electric heat pump;
The multistage electric heating pump comprises a first cold source inlet, a first cold source outlet, a first heat source inlet and a first heat source outlet; the water processor further comprises a third water outlet; the second heat exchanger further comprises a fourth water outlet;
The first heat source inlet is communicated with the third water outlet and the fourth water outlet, the first heat source inlet is communicated with the fifth water outlet of the second liquid providing device, the first heat source outlet is communicated with the fourth water inlet of the second liquid providing device, and the multistage electric heat pump is used for transferring heat in first liquid obtained through the third water outlet, the fourth water outlet and the first heat source inlet to second liquid obtained through the fifth water outlet and the first heat source inlet and conveying the second liquid subjected to heat exchange to the second liquid providing device through the first heat source outlet and the fourth water inlet.
2. The flue gas treatment device according to claim 1, wherein the flue gas waste heat recovery unit further comprises a third heat exchanger;
The third heat exchanger comprises a second heat source inlet, a second heat source outlet, a second cold source inlet and a second cold source outlet;
The second heat source inlet is communicated with the third water outlet and the fourth water outlet, the second cold source inlet is communicated with the fifth water outlet, the second cold source outlet is communicated with the fourth water inlet, the third heat exchanger is used for transferring heat in the first liquid obtained through the third water outlet, the fourth water outlet and the second heat source inlet to the second liquid obtained through the fifth water outlet and the second cold source inlet, and conveying the second liquid subjected to heat exchange to the second liquid providing device through the second cold source outlet and the fourth water inlet.
3. The flue gas treatment device according to claim 2, wherein the flue gas waste heat recovery unit further comprises a cooling tower;
The cooling tower comprises a fifth water inlet and a sixth water outlet;
the fifth water inlet is communicated with the first cold source outlet or the second heat source outlet, and the cooling tower is used for storing first liquid obtained through the first cold source outlet or the second heat source outlet and the fifth water inlet;
the sixth water outlet is communicated with the first water inlet, and the heat-moisture exchanger is further used for obtaining the first liquid stored in the cooling tower through the sixth water outlet and the first water inlet so as to realize the recycling of the first liquid.
4. A flue gas treatment device according to claim 3, wherein the flue gas whitening unit comprises a fourth heat exchanger;
The fourth heat exchanger comprises a fourth flue gas inlet, a fifth flue gas outlet, a sixth water inlet and a sixth water outlet; the heat-moisture exchanger further comprises a fourth flue gas outlet;
the fourth flue gas inlet is communicated with the fourth flue gas outlet, the sixth water inlet is communicated with the first heat source outlet or the second cold source outlet, the sixth water outlet is communicated with the first heat source inlet or the second cold source inlet, and the fourth heat exchanger is used for carrying out heat exchange on first liquid obtained through the first heat source outlet or the second cold source outlet and the sixth water inlet and flue gas obtained through the fourth flue gas outlet and the fourth flue gas inlet so as to carry out whitening treatment on the obtained flue gas;
The fourth heat exchanger is also used for discharging the flue gas subjected to the whitening treatment to the outside through the fifth flue gas outlet.
5. The flue gas treatment device of claim 4, wherein the spray tower further comprises a seventh water inlet;
The seventh water inlet is communicated with the first water outlet, and the heat-moisture exchanger is further used for conveying the first liquid subjected to heat exchange to the spray tower through the first water outlet and the seventh water inlet so as to supplement the desulfurization liquid in the spray tower.
6. The flue gas treatment device according to claim 5, wherein the device further comprises a wind power generation unit and a photovoltaic power generation unit;
The wind power generation is electrically connected with the multi-stage electric heat pump and is used for converting wind energy into electric energy and supplying the electric energy converted from the wind energy to the multi-stage electric heat pump;
The photovoltaic power generation unit is electrically connected with the multi-stage electric heat pump and is used for converting light energy into electric energy and supplying the electric energy converted by the light energy to the multi-stage electric heat pump.
7. An energy system, characterized in that it comprises a flue gas treatment device according to any one of claims 1-6.
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| CN112361650B (en) * | 2020-11-10 | 2022-02-18 | 昊姆（上海）节能科技有限公司 | Opening-closing type integrated heat pump device and application thereof |
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| CN108775595A (en) * | 2018-06-26 | 2018-11-09 | 云能科技有限公司 | Coal-fired flue-gas disappears white, emission reduction and waste heat depth retracting device and system |
| CN209714619U (en) * | 2019-03-20 | 2019-12-03 | 云能科技有限公司 | Flue gas processing device and energy resource system |
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| KR100954230B1 (en) * | 2009-09-28 | 2010-04-21 | 주식회사 유성엔지니어링 | Wet tipic desulfurizing system |
| CN204555136U (en) * | 2015-02-06 | 2015-08-12 | 王全龄 | A kind of full rinsing type air contaminant treatment system |
| CN108939889B (en) * | 2018-09-03 | 2020-12-11 | 东南大学 | Solution deep dehumidification flue gas treatment system |
| CN109432936A (en) * | 2018-12-04 | 2019-03-08 | 中冶南方都市环保工程技术股份有限公司 | Sintering flue gas processing method and processing system |
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| CN108775595A (en) * | 2018-06-26 | 2018-11-09 | 云能科技有限公司 | Coal-fired flue-gas disappears white, emission reduction and waste heat depth retracting device and system |
| CN209714619U (en) * | 2019-03-20 | 2019-12-03 | 云能科技有限公司 | Flue gas processing device and energy resource system |
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